TY - JOUR T1 - A 3D finite element ALE method using an approximate Riemann solution AN - 1868325829; PQ0004092772 AB - Arbitrary Lagrangian-Eulerian finite volume methods that solve a multidimensional Riemann-like problem at the cell center in a staggered grid hydrodynamic (SGH) arrangement have been proposed. This research proposes a new 3D finite element arbitrary Lagrangian-Eulerian SGH method that incorporates a multidimensional Riemann-like problem. Two different Riemann jump relations are investigated. A new limiting method that greatly improves the accuracy of the SGH method on isentropic flows is investigated. A remap method that improves upon a well-known mesh relaxation and remapping technique in order to ensure total energy conservation during the remap is also presented. Numerical details and test problem results are presented. A finite element arbitrary Lagrangian-Eulerian method that solves a multidirectional Riemann-like problem incorporating two limiting coefficients: the first is based on the minmod limiter and the second is a function of the discrete Mach number is presented. Our approach produces substantially less internal energy errors than the minmod limiter alone for a steel shell implosion as shown in Figure 1. For strong shock problems, the new limiter is more accurate and converges at a higher rate than the quadratic artificial viscosity. JF - International Journal for Numerical Methods in Fluids AU - Chiravalle, V P AU - Morgan, N R AD - Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM, USA. Y1 - 2017/03// PY - 2017 DA - March 2017 SP - 642 EP - 663 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 83 IS - 8 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1868325829?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=A+3D+finite+element+ALE+method+using+an+approximate+Riemann+solution&rft.au=Chiravalle%2C+V+P%3BMorgan%2C+N+R&rft.aulast=Chiravalle&rft.aufirst=V&rft.date=2017-03-01&rft.volume=83&rft.issue=8&rft.spage=642&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.4284 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-02-01 N1 - Last updated - 2017-02-15 DO - http://dx.doi.org/10.1002/fld.4284 ER - TY - JOUR T1 - Structure of Methylobacterium extorquens malyl-CoA lyase: CoA-substrate binding correlates with domain shift AN - 1872827460; PQ0004097826 AB - Malyl-CoA lyase (MCL) is an Mg super(2+)-dependent enzyme that catalyzes the reversible cleavage of (2S)-4-malyl-CoA to yield acetyl-CoA and glyoxylate. MCL enzymes, which are found in a variety of bacteria, are members of the citrate lyase-like family and are involved in the assimilation of one- and two-carbon compounds. Here, the 1.56Aa resolution X-ray crystal structure of MCL from Methylobacterium extorquens AM1 with bound Mg super(2+) is presented. Structural alignment with the closely related Rhodobacter sphaeroides malyl-CoA lyase complexed with Mg super(2+), oxalate and CoA allows a detailed analysis of the domain motion of the enzyme caused by substrate binding. Alignment of the structures shows that a simple hinge motion centered on the conserved residues Phe268 and Thr269 moves the C-terminal domain by about 30 degree relative to the rest of the molecule. This domain motion positions a conserved aspartate residue located in the C-terminal domain in the active site of the adjacent monomer, which may serve as a general acid/base in the catalytic mechanism. The structure of M. extorquens malyl-CoA lyase is reported, along with a detailed analysis of the domain motions involved in regulating its enzymatic activity. JF - Acta Crystallographica. Section F : Structural Biology Communications AU - Gonzalez, Javier M AU - Marti-Arbona, Ricardo AU - Chen, Julian C-H AU - Unkefer, Clifford J AD - Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM87545, USA. Y1 - 2017/02// PY - 2017 DA - February 2017 SP - 79 EP - 85 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 73 IS - 2 SN - 2053-230X, 2053-230X KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Microbiology Abstracts B: Bacteriology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1872827460?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Acta+Crystallographica.+Section+F+%3A+Structural+Biology+Communications&rft.atitle=Structure+of+Methylobacterium+extorquens+malyl-CoA+lyase%3A+CoA-substrate+binding+correlates+with+domain+shift&rft.au=Gonzalez%2C+Javier+M%3BMarti-Arbona%2C+Ricardo%3BChen%2C+Julian+C-H%3BUnkefer%2C+Clifford+J&rft.aulast=Gonzalez&rft.aufirst=Javier&rft.date=2017-02-01&rft.volume=73&rft.issue=2&rft.spage=79&rft.isbn=&rft.btitle=&rft.title=Acta+Crystallographica.+Section+F+%3A+Structural+Biology+Communications&rft.issn=2053230X&rft_id=info:doi/10.1107%2FS2053230X17001029 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-03-01 N1 - Last updated - 2017-03-01 DO - http://dx.doi.org/10.1107/S2053230X17001029 ER - TY - JOUR T1 - Transverse relaxation of selectively excited metabolites in stroke at 21.1T AN - 1868340446; PQ0004054581 AB - Purpose This study seeks to evaluate in vivo T sub(2) relaxation times of selectively excited stroke-relevant metabolites via super(1)H relaxation-enhanced magnetic resonance spectroscopy (RE-MRS) at 21.1T (900 MHz). Methods A quadrature surface coil was designed and optimized for investigations of rodents at 21.1T. With voxel localization, a RE-MRS pulse sequence incorporating the excitation of selected metabolites was modified to include a variable echo delay for T sub(2) measurements. A middle cerebral artery occlusion (MCAO) animal model for stroke was examined with spectra taken 24h post occlusion. Fourteen echo times were acquired, with each measurement completed in less than 2min. Results The RE-MRS approach produced high-quality spectra of the selectively excited metabolites in the stroked and contralateral regions. T sub(2) measurements reveal differential results between these regions, with significance achieved for lactic acid. Conclusion Using the RE-MRS technique at ultra-high magnetic field and an optimized quadrature surface coil design, full metabolic T sub(2) quantifications in a localized voxel is now possible in less than 27min. Magn Reson Med 77:520-528, 2017. JF - Magnetic Resonance in Medicine AU - Rosenberg, Jens T AU - Shemesh, Noam AU - Muniz, Jose A AU - Dumez, Jean-Nicolas AU - Frydman, Lucio AU - Grant, Samuel C AD - The National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, USA. Y1 - 2017/02// PY - 2017 DA - February 2017 SP - 520 EP - 528 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 77 IS - 2 SN - 0740-3194, 0740-3194 KW - Biotechnology and Bioengineering Abstracts KW - Magnetic fields KW - Magnetic resonance spectroscopy KW - Stroke KW - Animal models KW - Lactic acid KW - Metabolites KW - N.M.R. KW - Ischemia KW - Localization KW - Cerebral blood flow KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1868340446?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Magnetic+Resonance+in+Medicine&rft.atitle=Transverse+relaxation+of+selectively+excited+metabolites+in+stroke+at+21.1T&rft.au=Rosenberg%2C+Jens+T%3BShemesh%2C+Noam%3BMuniz%2C+Jose+A%3BDumez%2C+Jean-Nicolas%3BFrydman%2C+Lucio%3BGrant%2C+Samuel+C&rft.aulast=Rosenberg&rft.aufirst=Jens&rft.date=2017-02-01&rft.volume=77&rft.issue=2&rft.spage=520&rft.isbn=&rft.btitle=&rft.title=Magnetic+Resonance+in+Medicine&rft.issn=07403194&rft_id=info:doi/10.1002%2Fmrm.26132 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-02-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Magnetic fields; Magnetic resonance spectroscopy; Stroke; Lactic acid; Animal models; N.M.R.; Metabolites; Localization; Ischemia; Cerebral blood flow DO - http://dx.doi.org/10.1002/mrm.26132 ER - TY - JOUR T1 - Role of Atomic Layer Functionalization in Building Scalable Bottom-Up Assembly of Ultra-Low Density Multifunctional Three-Dimensional Nanostructures. AN - 1851292403; 27977930 AB - Building three-dimensional (3D) structures from their constituent zero-, one-, and two-dimensional nanoscale building blocks in a bottom-up assembly is considered the holey grail of nanotechnology. However, fabricating such 3D nanostructures at ambient conditions still remains a challenge. Here, we demonstrate an easily scalable facile method to fabricate 3D nanostructures made up of entirely zero-dimensional silicon dioxide (SiO2) nanoparticles. By combining functional groups and vacuum filtration, we fabricate lightweight and highly structural stable 3D SiO2 materials. Further synergistic effect of material is shown by addition of a 2D material, graphene oxide (GO) as reinforcement which results in 15-fold increase in stiffness. Molecular dynamics (MD) simulations are used to understand the interaction between silane functional groups (3-aminopropyl triethoxysilane) and SiO2 nanoparticles thus confirming the reinforcement capability of GO. In addition, the material is stable under high temperature and offers a cost-effective alternative to both fire-retardant and oil absorption materials. JF - ACS nano AU - Owuor, Peter Samora AU - Tsafack, Thierry AU - Hwang, Hye Yoon AU - Park, Ok-Kyung AU - Ozden, Sehmus AU - Bhowmick, Sanjit AU - Syed Amanulla, Syed Asif AU - Vajtai, Robert AU - Lou, Jun AU - Tiwary, Chandra Sekhar AU - Ajayan, Pulickel M AD - Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States. ; Materials Physics and Application Divison, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States. ; Hysitron, Inc. , Minneapolis, Minnesota 55344, United States. Y1 - 2017/01/24/ PY - 2017 DA - 2017 Jan 24 SP - 806 EP - 813 VL - 11 IS - 1 KW - silicon dioxide (SiO2) KW - silanes KW - stiffness KW - graphene oxide (GO) KW - molecular dynamics KW - functionalization UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1851292403?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Role+of+Atomic+Layer+Functionalization+in+Building+Scalable+Bottom-Up+Assembly+of+Ultra-Low+Density+Multifunctional+Three-Dimensional+Nanostructures.&rft.au=Owuor%2C+Peter+Samora%3BTsafack%2C+Thierry%3BHwang%2C+Hye+Yoon%3BPark%2C+Ok-Kyung%3BOzden%2C+Sehmus%3BBhowmick%2C+Sanjit%3BSyed+Amanulla%2C+Syed+Asif%3BVajtai%2C+Robert%3BLou%2C+Jun%3BTiwary%2C+Chandra+Sekhar%3BAjayan%2C+Pulickel+M&rft.aulast=Owuor&rft.aufirst=Peter&rft.date=2017-01-24&rft.volume=111&rft.issue=&rft.spage=871&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-12-15 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsnano.6b07249 ER - TY - JOUR T1 - Historical Perspectives and Guidelines for Botulinum Neurotoxin Subtype Nomenclature. AN - 1861583700; 28106761 AB - Botulinum neurotoxins are diverse proteins. They are currently represented by at least seven serotypes and more than 40 subtypes. New clostridial strains that produce novel neurotoxin variants are being identified with increasing frequency, which presents challenges when organizing the nomenclature surrounding these neurotoxins. Worldwide, researchers are faced with the possibility that toxins having identical sequences may be given different designations or novel toxins having unique sequences may be given the same designations on publication. In order to minimize these problems, an ad hoc committee consisting of over 20 researchers in the field of botulinum neurotoxin research was convened to discuss the clarification of the issues involved in botulinum neurotoxin nomenclature. This publication presents a historical overview of the issues and provides guidelines for botulinum neurotoxin subtype nomenclature in the future. JF - Toxins AU - Peck, Michael W AU - Smith, Theresa J AU - Anniballi, Fabrizio AU - Austin, John W AU - Bano, Luca AU - Bradshaw, Marite AU - Cuervo, Paula AU - Cheng, Luisa W AU - Derman, Yagmur AU - Dorner, Brigitte G AU - Fisher, Audrey AU - Hill, Karen K AU - Kalb, Suzanne R AU - Korkeala, Hannu AU - Lindström, Miia AU - Lista, Florigio AU - Lúquez, Carolina AU - Mazuet, Christelle AU - Pirazzini, Marco AU - Popoff, Michel R AU - Rossetto, Ornella AU - Rummel, Andreas AU - Sesardic, Dorothea AU - Singh, Bal Ram AU - Stringer, Sandra C AD - Institute of Food Research, Norwich NR4 7UA, UK. Mike.Peck@ifr.ac.uk. ; Molecular and Translational Sciences Division, United States Army Medical Institute of Infectious Diseases, Fort Detrick, MD 21702, USA. theresa.j.smith.ctr@mail.mil. ; National Reference Centre for Botulism, Istituto Superiore di Sanita, Rome 299-00161, Italy. fabrizio.anniballi@iss.it. ; Bureau of Microbial Hazards, Health Canada, Ottawa, ON K1A 0K9, Canada. john.austin@hc-sc.gc.ca. ; Istituto Zooprofilattico Sperimentale delle Venezie, Treviso 31020, Italy. lbano@izsvenezie.it. ; Department of Bacteriology, University of Wisconsin, Madison, WI 53706, USA. mbradsha@wisc.edu. ; Área de Microbiología, Departamento de Patología, Universidad Nacional de Cuyo, Mendoza 450001, Argentina. paulacuervo84@gmail.com. ; Foodborne Toxin Detection and Prevention Research Unit, Western Regional Research Center, U.S. Department of Agriculture, Albany, CA 94710, USA. luisa.cheng@ars.usda.gov. ; Department of Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, Helsinki 00014, Finland. yagmur.derman@helsinki.fi. ; Robert Koch Institute, Berlin 13353, Germany. dornerb@rki.de. ; Applied Physics Laboratory, Johns Hopkins University, Baltimore, MD 21218, USA. audrey.fischer@jhuapl.edu. ; Los Alamos National Laboratories, Los Alamos, NM 87545, USA. khill@lanl.gov. ; National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA. skalb@cdc.gov. ; Department of Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, Helsinki 00014, Finland. hannu.korkeala@helsinki.fi. ; Department of Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, Helsinki 00014, Finland. miia.lindstrom@helsinki.fi. ; Army Medical and Veterinary Research Center, Rome 00184, Italy. romano.lista@gmail.com. ; National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA. cluquez@cdc.gov. ; Institut Pasteur, Bactéries anaérobies et Toxines, Paris 75015, France. christelle.mazuet@pasteur.fr. ; Biomedical Sciences Department, University of Padova, Padova 35131, Italy. marcopiraz@gmail.com. ; Institut Pasteur, Bactéries anaérobies et Toxines, Paris 75015, France. mpopoff@pasteur.fr. ; Biomedical Sciences Department, University of Padova, Padova 35131, Italy. ornella.rossetto@unipd.it. ; Institut für Toxikologie, Medizinische Hochschule Hannover, Hannover 30623, Germany. Rummel.Andreas@mh-hannover.de. ; National Institute for Biological Standards and Control, a Centre of Medicines and Healthcare Products Regulatory Agency, Hertfordshire EN6 3QG, UK. thea.sesardic@nibsc.org. ; Botulinum Research Center, Institute of Advanced Sciences, Dartmouth, MA 02747, USA. bsingh@inads.org. ; Institute of Food Research, Norwich NR4 7UA, UK. Sandra.Stringer@ifr.ac.uk. Y1 - 2017/01/18/ PY - 2017 DA - 2017 Jan 18 VL - 9 IS - 1 KW - subtypes KW - nomenclature KW - neurotoxins KW - botulinum KW - guidelines KW - Clostridium botulinum KW - botulism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861583700?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Toxins&rft.atitle=Historical+Perspectives+and+Guidelines+for+Botulinum+Neurotoxin+Subtype+Nomenclature.&rft.au=Peck%2C+Michael+W%3BSmith%2C+Theresa+J%3BAnniballi%2C+Fabrizio%3BAustin%2C+John+W%3BBano%2C+Luca%3BBradshaw%2C+Marite%3BCuervo%2C+Paula%3BCheng%2C+Luisa+W%3BDerman%2C+Yagmur%3BDorner%2C+Brigitte+G%3BFisher%2C+Audrey%3BHill%2C+Karen+K%3BKalb%2C+Suzanne+R%3BKorkeala%2C+Hannu%3BLindstr%C3%B6m%2C+Miia%3BLista%2C+Florigio%3BL%C3%BAquez%2C+Carolina%3BMazuet%2C+Christelle%3BPirazzini%2C+Marco%3BPopoff%2C+Michel+R%3BRossetto%2C+Ornella%3BRummel%2C+Andreas%3BSesardic%2C+Dorothea%3BSingh%2C+Bal+Ram%3BStringer%2C+Sandra+C&rft.aulast=Peck&rft.aufirst=Michael&rft.date=2017-01-18&rft.volume=9&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Toxins&rft.issn=2072-6651&rft_id=info:doi/10.3390%2Ftoxins9010038 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2017-01-20 N1 - Date revised - 2017-02-28 N1 - SuppNotes - Cited By: Curr Microbiol. 1998 Nov;37(5):312-8 [9767710] Microbiol Immunol. 1995;39(10):767-74 [8577267] Infect Immun. 2005 Sep;73(9):5450-7 [16113261] BMC Microbiol. 2012 Oct 31;12 :245 [23113872] J Clin Microbiol. 2009 Sep;47(9):2720-8 [19571018] Zentralbl Bakteriol Orig. 1970;215(2):212-20 [4992024] Infect Immun. 2013 Oct;81(10):3894-902 [23918782] PLoS One. 2014 Jan 27;9(1):e77792 [24475015] J Cell Biol. 2007 Dec 31;179(7):1511-22 [18158333] J Infect Dis. 2014 Jan 15;209(2):183-91 [24106296] FEBS Lett. 2012 Jan 20;586(2):109-15 [22172278] Curr Microbiol. 1998 Oct;37(4):262-8 [9732534] J Bacteriol. 1919 Sep;4(5):555-570.1 [16558852] J Infect Dis. 2014 Jan 15;209(2):192-202 [24106295] Appl Environ Microbiol. 2014 Oct;80(20):6334-45 [25107978] J Clin Microbiol. 2015 Feb;53(2):722-6 [25428161] Curr Top Microbiol Immunol. 2013;364:1-20 [23239346] Eur J Biochem. 1990 Apr 20;189(1):73-81 [2185020] J Cell Sci. 2012 Jul 1;125(Pt 13):3233-42 [22454523] Biochem Biophys Res Commun. 1972 Jul 11;48(1):108-12 [5041870] Nucleic Acids Res. 1990 Sep 25;18(18):5556 [2216736] Food Microbiol. 2011 Apr;28(2):183-91 [21315972] Res Microbiol. 2015 May;166(4):290-302 [25312020] J Biol Chem. 1996 May 3;271(18):10786-92 [8631890] J Clin Microbiol. 2006 Nov;44(11):4057-65 [16971642] Curr Top Microbiol Immunol. 2013;364:139-57 [23239352] Biochem Biophys Res Commun. 2007 Sep 14;361(1):49-54 [17658467] Jpn J Med Sci Biol. 1984 Jun;37(3):137-40 [6389944] Appl Environ Microbiol. 1992 Aug;58(8):2345-54 [1514783] PLoS One. 2009;4(3):e4829 [19287483] Science. 2006 Apr 28;312(5773):592-6 [16543415] Appl Environ Microbiol. 2011 Dec;77(24):8625-34 [22003031] Toxicon. 2015 Dec 1;107(Pt A):37-42 [26130522] mSphere. 2016 Feb 24;1(1):null [27303710] Adv Microb Physiol. 2009;55:183-265, 320 [19573697] Genome Biol Evol. 2016 Mar 02;8(3):540-55 [26936890] Appl Environ Microbiol. 2015 Aug 15;81(16):5420-9 [26048939] Toxicon. 2013 Oct;73:9-16 [23834917] J Bacteriol. 2007 Dec;189(23):8643-50 [17905976] Infect Immun. 1986 Jun;52(3):786-91 [2423459] Genome Announc. 2015 Apr 02;3(2):null [25838491] Health Lab Sci. 1978 Apr;15(2):74-80 [355208] BMC Genomics. 2016 Mar 03;17 :180 [26939550] Nat Struct Mol Biol. 2016 Jul;23 (7):656-62 [27294781] Medicina (B Aires). 1972 Nov-Dec;32(6):596-606 [4576316] Biochim Biophys Acta. 1993 Dec 14;1216(3):487-91 [8268233] BMC Genomics. 2013 May 16;14:333 [23679073] J Clin Microbiol. 1994 Aug;32(8):1911-7 [7989542] J Mol Biol. 2006 Sep 29;362(4):733-42 [16938310] J Infect Dis. 2016 Feb 1;213(3):379-85 [26068781] Infect Genet Evol. 2015 Mar;30:102-13 [25489752] Appl Environ Microbiol. 2011 Jun;77(12):4217-22 [21515732] Eur J Biochem. 1992 Mar 1;204(2):657-67 [1541280] Appl Environ Microbiol. 2014 Dec;80(23):7415-22 [25239905] BMC Genomics. 2009 Mar 19;10:115 [19298644] Appl Environ Microbiol. 2010 Jul;76(14):4805-12 [20511432] FEMS Immunol Med Microbiol. 1999 Jul;24(3):267-74 [10397310] Curr Microbiol. 1994 Feb;28(2):101-10 [7764370] Mol Biol Cell. 2008 Dec;19(12 ):5226-37 [18815274] Toxicon. 2015 Dec 1;107(Pt A):2-8 [26368006] J Infect Dis. 2016 May 15;213(10):1606-14 [26936913] Anal Chem. 2015 Apr 7;87(7):3911-7 [25731972] Infect Immun. 1972 Oct;6(4):587-90 [4564288] PLoS Pathog. 2011 Mar;7(3):e1002008 [21483489] Appl Environ Microbiol. 2012 May;78(9):3108-13 [22367089] Mol Microbiol. 2011 Jul;81(1):143-56 [21542861] FEMS Microbiol Lett. 1992 Sep 15;75(2-3):225-30 [1398040] FEBS Lett. 2015 Jan 30;589(3):342-8 [25541486] Infect Genet Evol. 2015 Dec;36:62-71 [26341861] Infect Immun. 1982 Oct;38(1):14-20 [6183207] Genome Res. 2007 Jul;17(7):1082-92 [17519437] J Cell Biol. 2003 Sep 29;162(7):1293-303 [14504267] BMC Genomics. 2011 Apr 12;12:185 [21486474] Infect Immun. 1998 Oct;66(10):4811-6 [9746583] Nucleic Acids Res. 1990 Aug 25;18(16):4924 [2204031] J Appl Bacteriol. 1988 Apr;64(4):285-91 [3049499] PLoS One. 2014 Feb 27;9(2):e90252 [24587301] Nat Rev Microbiol. 2014 Aug;12(8):535-49 [24975322] J Biol Chem. 1990 Jun 5;265(16):9153-8 [2160960] J Infect Dis. 1981 Jan;143(1):22-7 [7012244] J Bacteriol. 2007 Feb;189(3):818-32 [17114256] J Clin Microbiol. 1988 Oct;26(10):2191-2 [3183004] Rev Infect Dis. 1979 Jul-Aug;1(4):701-19 [399378] FEBS Lett. 2006 Apr 3;580(8):2011-4 [16545378] Dev Biol Stand. 1976;32:175-83 [793913] FEBS Lett. 2011 Jan 3;585(1):199-206 [21126520] Cell Mol Life Sci. 2014 Mar;71(5):793-811 [23749048] PLoS One. 2007 Dec 05;2(12):e1271 [18060065] Appl Environ Microbiol. 1985 Jul;50(1):63-7 [3927840] Biochim Biophys Acta. 1996 Jun 7;1307(2):123-6 [8679691] Biochem Biophys Res Commun. 1992 Feb 28;183(1):107-13 [1543481] J Biol Chem. 2004 Jul 16;279(29):30865-70 [15123599] Genome Biol Evol. 2013;5(5):1032-7 [23645598] Res Microbiol. 1993 Sep;144(7):547-56 [8310180] Toxicon. 2013 Dec 1;75:101-7 [23396042] Res Microbiol. 2015 May;166(4):303-17 [25445012] Avian Dis. 2005 Sep;49(3):376-81 [16252491] J Neurochem. 2009 Sep;110(6):1942-54 [19650874] Biochem J. 2013 Jul 1;453(1):37-47 [23621114] JAMA. 2001 Feb 28;285(8):1059-70 [11209178] PLoS One. 2015 Feb 06;10(2):e0116381 [25658638] Biochemistry. 2009 Jun 23;48(24):5631-41 [19476346] Sci Rep. 2016 Jul 22;6:30257 [27443638] Toxicon. 2015 Dec 1;107(Pt A):9-24 [26363288] Conflict of Interest: The authors declare no conflict of interest. N1 - Last updated - 2017-02-28 DO - http://dx.doi.org/10.3390/toxins9010038 ER - TY - JOUR T1 - Base changes in tumour DNA have the power to reveal the causes and evolution of cancer. AN - 1826697725; 27270430 AB - Next-generation sequencing (NGS) technology has demonstrated that the cancer genomes are peppered with mutations. Although most somatic tumour mutations are unlikely to have any role in the cancer process per se, the spectra of DNA sequence changes in tumour mutation catalogues have the potential to identify the mutagens, and to reveal the mutagenic processes responsible for human cancer. Very recently, a novel approach for data mining of the vast compilations of tumour NGS data succeeded in separating and precisely defining at least 30 distinct patterns of sequence change hidden in mutation databases. At least half of these mutational signatures can be readily assigned to known human carcinogenic exposures or endogenous mechanisms of mutagenesis. A quantum leap in our knowledge of mutagenesis in human cancers has resulted, stimulating a flurry of research activity. We trace here the major findings leading first to the hypothesis that carcinogenic insults leave characteristic imprints on the DNA sequence of tumours, and culminating in empirical evidence from NGS data that well-defined carcinogen mutational signatures are indeed present in tumour genomic DNA from a variety of cancer types. The notion that tumour DNAs can divulge environmental sources of mutation is now a well-accepted fact. This approach to cancer aetiology has also incriminated various endogenous, enzyme-driven processes that increase the somatic mutation load in sporadic cancers. The tasks now confronting the field of molecular epidemiology are to assign mutagenic processes to orphan and newly discovered tumour mutation patterns, and to determine whether avoidable cancer risk factors influence signatures produced by endogenous enzymatic mechanisms. Innovative research with experimental models and exploitation of the geographical heterogeneity in cancer incidence can address these challenges. JF - Oncogene AU - Hollstein, M AU - Alexandrov, L B AU - Wild, C P AU - Ardin, M AU - Zavadil, J AD - Molecular Mechanisms and Biomarkers, International Agency for Research on Cancer, World Health Organization, Lyon, France. ; Theoretical Biology and Biophysics (T-6), Los Alamos National Laboratory, Los Alamos, NM, USA. ; International Agency for Research on Cancer, World Health Organization, Lyon, France. Y1 - 2017/01/12/ PY - 2017 DA - 2017 Jan 12 SP - 158 EP - 167 VL - 36 IS - 2 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1826697725?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Oncogene&rft.atitle=Base+changes+in+tumour+DNA+have+the+power+to+reveal+the+causes+and+evolution+of+cancer.&rft.au=Hollstein%2C+M%3BAlexandrov%2C+L+B%3BWild%2C+C+P%3BArdin%2C+M%3BZavadil%2C+J&rft.aulast=Hollstein&rft.aufirst=M&rft.date=2017-01-12&rft.volume=36&rft.issue=2&rft.spage=158&rft.isbn=&rft.btitle=&rft.title=Oncogene&rft.issn=1476-5594&rft_id=info:doi/10.1038%2Fonc.2016.192 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-06-08 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/onc.2016.192 ER - TY - JOUR T1 - Phase Separation of Dirac Electrons in Topological Insulators at the Spatial Limit. AN - 1853740596; 28026959 AB - In this work we present unique signatures manifested by the local electronic properties of the topological surface state in Bi2Te3 nanostructures as the spatial limit is approached. We concentrate on the pure nanoscale limit (nanoplatelets) with spatial electronic resolution down to 1 nm. The highlights include strong dependencies on nanoplatelet size: (1) observation of a phase separation of Dirac electrons whose length scale decreases as the spatial limit is approached, and (2) the evolution from heavily n-type to lightly n-type surface doping as nanoplatelet thickness increases. Our results show a new approach to tune the Dirac point together with reduction of electronic disorder in topological insulator (TI) nanostructured systems. We expect our work will provide a new route for application of these nanostructured Dirac systems in electronic devices. JF - Nano letters AU - Parra, Carolina AU - Rodrigues da Cunha, Thiago Henrique AU - Contryman, Alex W AU - Kong, Desheng AU - Montero-Silva, Francisco AU - Rezende Gonçalves, Pedro Henrique AU - Dos Reis, Diogo Duarte AU - Giraldo-Gallo, Paula AU - Segura, Rodrigo AU - Olivares, Fernanda AU - Niestemski, Francis AU - Cui, Yi AU - Magalhaes-Paniago, Rogerio AU - Manoharan, Hari C AD - Laboratorio Nanobiomateriales, Departamento de Física, Universidad Técnica Federico Santa María , Avenida España, 1680, Valparaíso, Chile. ; CTNanotubos, Universidade Federal de Minas Gerais , Rua Professor José Vieira de Mendonça 1.000, Engenho Nogueira, BH, Brazil. ; Department of Applied Physics, Stanford University , Stanford, California 94305, United States. ; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory , Menlo Park, California 94025, United States. ; Departamento de Física, Universidade Federal de Minas Gerais , CP 702 Belo Horizonte, MG CEP 30123-970, Brazil. ; National High Magnetic Field Laboratory , Tallahassee, Florida 32310, United States. ; Instituto de Química y Bioquímica, Facultad de Ciencias, Universidad de Valparaíso , Av. Gran Bretaña, 1111 Valparaíso, Chile. ; Department of Physics, Stanford University , Stanford, California 94305, United States. Y1 - 2017/01/11/ PY - 2017 DA - 2017 Jan 11 SP - 97 EP - 103 VL - 17 IS - 1 KW - scanning tunneling spectroscopy KW - Bi2Te3 KW - Topological insulator nanostructures KW - Dirac electrons KW - phase separation KW - doping UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1853740596?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nano+letters&rft.atitle=Phase+Separation+of+Dirac+Electrons+in+Topological+Insulators+at+the+Spatial+Limit.&rft.au=Parra%2C+Carolina%3BRodrigues+da+Cunha%2C+Thiago+Henrique%3BContryman%2C+Alex+W%3BKong%2C+Desheng%3BMontero-Silva%2C+Francisco%3BRezende+Gon%C3%A7alves%2C+Pedro+Henrique%3BDos+Reis%2C+Diogo+Duarte%3BGiraldo-Gallo%2C+Paula%3BSegura%2C+Rodrigo%3BOlivares%2C+Fernanda%3BNiestemski%2C+Francis%3BCui%2C+Yi%3BMagalhaes-Paniago%2C+Rogerio%3BManoharan%2C+Hari+C&rft.aulast=Parra&rft.aufirst=Carolina&rft.date=2017-01-11&rft.volume=17&rft.issue=1&rft.spage=97&rft.isbn=&rft.btitle=&rft.title=Nano+letters&rft.issn=1530-6992&rft_id=info:doi/10.1021%2Facs.nanolett.6b03506 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-12-27 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acs.nanolett.6b03506 ER - TY - JOUR T1 - Accurate relative location estimates for the North Korean nuclear tests using empirical slowness corrections AN - 1873349690; 2017-014241 AB - Declared North Korean nuclear tests in 2006, 2009, 2013 and 2016 were observed seismically at regional and teleseismic distances. Waveform similarity allows the events to be located relatively with far greater accuracy than the absolute locations can be determined from seismic data alone. There is now significant redundancy in the data given the large number of regional and teleseismic stations that have recorded multiple events, and relative location estimates can be confirmed independently by performing calculations on many mutually exclusive sets of measurements. Using a 1-D global velocity model, the distances between the events estimated using teleseismic P phases are found to be approximately 25 per cent shorter than the distances between events estimated using regional Pn phases. The 2009, 2013 and 2016 events all take place within 1 km of each other and the discrepancy between the regional and teleseismic relative location estimates is no more than about 150 m. The discrepancy is much more significant when estimating the location of the more distant 2006 event relative to the later explosions with regional and teleseismic estimates varying by many hundreds of metres. The relative location of the 2006 event is challenging given the smaller number of observing stations, the lower signal-to-noise ratio and significant waveform dissimilarity at some regional stations. The 2006 event is however highly significant in constraining the absolute locations in the terrain at the Punggye-ri test-site in relation to observed surface infrastructure. For each seismic arrival used to estimate the relative locations, we define a slowness scaling factor which multiplies the gradient of seismic traveltime versus distance, evaluated at the source, relative to the applied 1-D velocity model. A procedure for estimating correction terms which reduce the double-difference time residual vector norms is presented together with a discussion of the associated uncertainty. The modified velocity gradients reduce the residuals, the relative location uncertainties and the sensitivity to the combination of stations used. The traveltime gradients appear to be overestimated for the regional phases, and teleseismic relative location estimates are likely to be more accurate despite an apparent lower precision. Calibrations for regional phases are essential given that smaller magnitude events are likely not to be recorded teleseismically. We discuss the implications for the absolute event locations. Placing the 2006 event under a local maximum of overburden at 41.293 degrees N, 129.105 degrees E would imply a location of 41.299 degrees N, 129.075 degrees E for the January 2016 event, providing almost optimal overburden for the later four events. JF - Geophysical Journal International AU - Gibbons, Steven J AU - Pabian, F AU - Nasholm, S P AU - Kvaerna, T AU - Mykkeltveit, S Y1 - 2017/01// PY - 2017 DA - January 2017 SP - 101 EP - 117 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 208 IS - 1 SN - 0956-540X, 0956-540X KW - scale factor KW - P-waves KW - Far East KW - one-dimensional models KW - Pn-waves KW - North Korea KW - elastic waves KW - calibration KW - waveforms KW - seismic sources KW - velocity KW - nuclear explosions KW - Asia KW - uncertainty KW - body waves KW - precision KW - overburden KW - monitoring KW - double-difference method KW - time series analysis KW - explosions KW - statistical analysis KW - inverse problem KW - Korea KW - teleseismic signals KW - Punggye-ri Test Site KW - traveltime KW - signal-to-noise ratio KW - seismic waves KW - corrections KW - seismic networks KW - NORSAR KW - accuracy KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873349690?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Accurate+relative+location+estimates+for+the+North+Korean+nuclear+tests+using+empirical+slowness+corrections&rft.au=Gibbons%2C+Steven+J%3BPabian%2C+F%3BNasholm%2C+S+P%3BKvaerna%2C+T%3BMykkeltveit%2C+S&rft.aulast=Gibbons&rft.aufirst=Steven&rft.date=2017-01-01&rft.volume=110&rft.issue=&rft.spage=840&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - Number of references - 22 N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - Last updated - 2017-03-02 N1 - SubjectsTermNotLitGenreText - accuracy; Asia; body waves; calibration; Comprehensive Test Ban Treaty; corrections; double-difference method; elastic waves; explosions; Far East; inverse problem; Korea; monitoring; NORSAR; North Korea; nuclear explosions; one-dimensional models; overburden; P-waves; Pn-waves; precision; Punggye-ri Test Site; scale factor; seismic networks; seismic sources; seismic waves; signal-to-noise ratio; statistical analysis; teleseismic signals; time series analysis; traveltime; uncertainty; velocity; waveforms DO - http://dx.doi.org/10.1093/gji/ggw379 ER - TY - JOUR T1 - Piceance Basin Mesaverde anomalous self-potential response; identification of capillary seals in a basin-centered gas accumulation AN - 1869031486; 2017-012051 AB - Wells in the Piceance Basin show anomalous large-magnitude (up to 200 mV), large-interval (>2000 ft [610 m]) self-potential (SP) log responses in the Mesaverde gas-producing interval that can be best explained by electrokinetic potential resulting from water flow toward producing Mesaverde wells. Water flow is compartmentalized by capillary seals that are formed when gas generated from coals saturates adjacent thinly bedded sandstones and shales. Capillary seals can be identified by shifts in the SP baseline. The first wells drilled in an area with no previous Mesaverde production have very little SP response, as is expected in tight sandstones with single- to double-digit microdarcy permeability. After Mesaverde production is established in a new area, the SP log begins to show stepwise changes to more negative values beginning in the upper Mesaverde and becoming increasingly more negative with increased depth. The magnitude of the change to more negative values increases with time in an area of active Mesaverde production; some of the more recent SP logs have negative deflections of over 200 mV. This type of SP anomaly has not been reported before, and these anomalies can be used to identify large-scale water movement within a reservoir. JF - AAPG Bulletin AU - Cumella, Stephen P AU - Woodruff, William F AU - Revil, Andre Y1 - 2017/01// PY - 2017 DA - January 2017 SP - 19 EP - 37 PB - American Association of Petroleum Geologists, Tulsa, OK VL - 101 IS - 1 SN - 0149-1423, 0149-1423 KW - United States KW - overpressure KW - Piceance Basin KW - Cretaceous KW - natural gas KW - Mesaverde Group KW - sandstone KW - regression KW - petroleum KW - tight sands KW - production KW - Upper Cretaceous KW - sedimentary rocks KW - compartmentalization KW - coal KW - migration KW - well logs KW - shale KW - Mamm Creek Field KW - geophysical methods KW - electrical methods KW - petroleum accumulation KW - Mesozoic KW - genesis KW - self-potential methods KW - sea-level changes KW - saturation KW - Colorado KW - northwestern Colorado KW - clastic rocks KW - permeability KW - 29A:Economic geology, geology of energy sources KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869031486?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=AAPG+Bulletin&rft.atitle=Piceance+Basin+Mesaverde+anomalous+self-potential+response%3B+identification+of+capillary+seals+in+a+basin-centered+gas+accumulation&rft.au=Cumella%2C+Stephen+P%3BWoodruff%2C+William+F%3BRevil%2C+Andre&rft.aulast=Cumella&rft.aufirst=Stephen&rft.date=2017-01-01&rft.volume=101&rft.issue=1&rft.spage=19&rft.isbn=&rft.btitle=&rft.title=AAPG+Bulletin&rft.issn=01491423&rft_id=info:doi/10.1306%2F06201615130 L2 - http://aapgbull.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States N1 - Date revised - 2017-01-01 N1 - Number of references - 24 N1 - PubXState - OK N1 - Document feature - illus. incl. sects., strat. cols., sketch maps N1 - Last updated - 2017-02-17 N1 - CODEN - AABUD2 N1 - SubjectsTermNotLitGenreText - clastic rocks; coal; Colorado; compartmentalization; Cretaceous; electrical methods; genesis; geophysical methods; Mamm Creek Field; Mesaverde Group; Mesozoic; migration; natural gas; northwestern Colorado; overpressure; permeability; petroleum; petroleum accumulation; Piceance Basin; production; regression; sandstone; saturation; sea-level changes; sedimentary rocks; self-potential methods; shale; tight sands; United States; Upper Cretaceous; well logs DO - http://dx.doi.org/10.1306/06201615130 ER - TY - JOUR T1 - Chemistry of diagenetic features analyzed by ChemCam at Pahrump Hills, Gale Crater, Mars AN - 1861082834; 783948-10 AB - The Curiosity rover's campaign at Pahrump Hills provides the first analyses of lower Mount Sharp strata. Here we report ChemCam elemental composition of a diverse assemblage of post-depositional features embedded in, or cross-cutting, the host rock. ChemCam results demonstrate their compositional diversity, especially compared to the surrounding host rock: (i) Dendritic aggregates and relief enhanced features, characterized by a magnesium enhancement and sulfur detection, and interpreted as Mg-sulfates; (ii) A localized observation that displays iron enrichment associated with sulfur, interpreted as Fe-sulfate; (iii) Dark raised ridges with varying Mg- and Ca-enriched compositions compared to host rock; (iv) Several dark-toned veins with calcium enhancement associated with fluorine detection, interpreted as fluorite veins. (v) Light-toned veins with enhanced calcium associated with sulfur detection, and interpreted as Ca-sulfates. The diversity of the Pahrump Hills diagenetic assemblage suggests a complex post-depositional history for fine-grained sediments for which the origin has been interpreted as fluvial and lacustrine. Assessment of the spatial and relative temporal distribution of these features shows that the Mg-sulfate features are predominant in the lower part of the section, suggesting local modification of the sediments by early diagenetic fluids. In contrast, light-toned Ca-sulfate veins occur in the whole section and cross-cut all other features. A relatively late stage shift in geochemical conditions could explain this observation. The Pahrump Hills diagenetic features have no equivalent compared to targets analyzed in other locations at Gale crater. Only the light-toned Ca-sulfate veins are present elsewhere, along Curiosity's path, suggesting they formed through a common late-stage process that occurred at over a broad area. JF - Icarus AU - Nachon, Marion AU - Mangold, N AU - Forni, O AU - Kah, L C AU - Cousin, A AU - Wiens, R C AU - Anderson, R AU - Blaney, D AU - Blank, J G AU - Calef, F AU - Clegg, S M AU - Fabre, C AU - Fisk, M R AU - Gasnault, O AU - Grotzinger, J P AU - Kronyak, R AU - Lanza, N L AU - Lasue, J AU - Le Deit, L AU - Le Mouelic, S AU - Maurice, S AU - Meslin, P Y AU - Oehler, D Z AU - Payre, V AU - Rapin, W AU - Schroeder, S AU - Stack, K AU - Sumner, D Y1 - 2017/01/01/ PY - 2017 DA - 2017 Jan 01 SP - 121 EP - 136 PB - Elsevier, New York, NY VL - 281 SN - 0019-1035, 0019-1035 KW - halides KW - calcium sulfate KW - calcium KW - magnesium KW - fluorides KW - Mars KW - iron KW - Gale Crater KW - spatial distribution KW - Curiosity Rover KW - chemical composition KW - fluorite KW - ChemCam instrument KW - alkaline earth metals KW - magnesium sulfates KW - sulfates KW - textures KW - veins KW - iron sulfates KW - Pahrump Hills KW - terrestrial planets KW - aqueous alteration KW - planets KW - metals KW - diagenesis KW - Mars Science Laboratory KW - sulfur KW - temporal distribution KW - Mount Sharp KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861082834?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=Chemistry+of+diagenetic+features+analyzed+by+ChemCam+at+Pahrump+Hills%2C+Gale+Crater%2C+Mars&rft.au=Nachon%2C+Marion%3BMangold%2C+N%3BForni%2C+O%3BKah%2C+L+C%3BCousin%2C+A%3BWiens%2C+R+C%3BAnderson%2C+R%3BBlaney%2C+D%3BBlank%2C+J+G%3BCalef%2C+F%3BClegg%2C+S+M%3BFabre%2C+C%3BFisk%2C+M+R%3BGasnault%2C+O%3BGrotzinger%2C+J+P%3BKronyak%2C+R%3BLanza%2C+N+L%3BLasue%2C+J%3BLe+Deit%2C+L%3BLe+Mouelic%2C+S%3BMaurice%2C+S%3BMeslin%2C+P+Y%3BOehler%2C+D+Z%3BPayre%2C+V%3BRapin%2C+W%3BSchroeder%2C+S%3BStack%2C+K%3BSumner%2C+D&rft.aulast=Nachon&rft.aufirst=Marion&rft.date=2017-01-01&rft.volume=281&rft.issue=&rft.spage=121&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2016.08.026 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Number of references - 50 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables, strat. col. N1 - Last updated - 2017-01-24 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; aqueous alteration; calcium; calcium sulfate; ChemCam instrument; chemical composition; Curiosity Rover; diagenesis; fluorides; fluorite; Gale Crater; halides; iron; iron sulfates; magnesium; magnesium sulfates; Mars; Mars Science Laboratory; metals; Mount Sharp; Pahrump Hills; planets; spatial distribution; sulfates; sulfur; temporal distribution; terrestrial planets; textures; veins DO - http://dx.doi.org/10.1016/j.icarus.2016.08.026 ER - TY - JOUR T1 - Allan R. Sanford (1927-2016) AN - 1859790098; 2017-006078 JF - Seismological Research Letters AU - Hartse, Hans Y1 - 2017/01// PY - 2017 DA - January 2017 SP - 4 EP - 5 PB - Seismological Society of America, El Cerrito, CA VL - 88 IS - 1 SN - 0895-0695, 0895-0695 KW - Sanford, Allan R. KW - publications KW - microearthquakes KW - earthquakes KW - biography KW - crust KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859790098?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Allan+R.+Sanford+%281927-2016%29&rft.au=Hartse%2C+Hans&rft.aulast=Hartse&rft.aufirst=Hans&rft.date=2017-01-01&rft.volume=88&rft.issue=1&rft.spage=4&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220160198 L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CA N1 - Document feature - portr. N1 - Last updated - 2017-01-19 N1 - SubjectsTermNotLitGenreText - biography; crust; earthquakes; microearthquakes; publications; Sanford, Allan R. DO - http://dx.doi.org/10.1785/0220160198 ER - TY - JOUR T1 - Precipitation, not air temperature, drives functional responses of trees in semi-arid ecosystems AN - 1859489195; PQ0003966408 AB - 1. Model scenarios of climate change predict that warming and drought will occur simultaneously in the future in many regions. The capacity of woody species to modify their physiology and morphology in response to environmental conditions is widely recognized, but little is known about the responses of trees to reduced precipitation and increased temperature acting simultaneously. 2. In a semi-arid woodland, we assessed the responses in physiological (needle emergence, maximum photosynthesis, stomatal conductance, water use efficiency (WUE) and shoot elongation) and morphological (needle length and thickness, and leaf mass per area (LMA)) foliar traits of pinon pine (Pinus edulis) in response to three years of a 45% reduction in precipitation, a 4.8 degree C increase in air temperature and their simultaneous effects. 3. A strong change in physiological and morphological traits in response to reduced precipitation was observed. Precipitation reduction delayed needle emergence, decreased photosynthesis and stomatal conductance, increased WUE, decreased shoot elongation and induced shorter needles with a higher LMA. Trees subjected to simultaneous reductions in precipitation and warming demonstrated a similar response. However, atmospheric warming did not induce a response in any of the measured traits. 4. Physiological and morphological traits of trees in this semi-arid climate were more responsive to changes in soil moisture than air temperature. Long-term exposure to seasonal drought stress in arid sites may have resulted in strong plastic responses to this first stressor. However, atmospheric warming probably was not experienced as a stress for trees in this warm and dry climate. Overall, our results indicate that in semi-arid ecosystems where tree functioning is already highly limited by soil water availability, atmospheric warming as anticipated with climate change may have less impact on foliar trait responses than previously thought. Warming and drought will occur simultaneously in the future in many regions, but little is known about the responses of trees to reduced precipitation and increased temperature acting at once. In a semi-arid woodland, we assessed the responses in physiological and morphological foliar traits of pinon pine and juniper in response to three years of a 45% reduction in precipitation, a 4.8 degree C increase in air temperature and their simultaneous effects. Our results indicate that in ecosystems where tree functioning is already highly limited by soil water availability, atmospheric warming as anticipated with climate change may have less impact on foliar trait responses than previously thought. JF - Journal of Ecology AU - Grossiord, Charlotte AU - Sevanto, Sanna AU - Adams, Henry D AU - Collins, Adam D AU - Dickman, Lee T AU - McBranch, Natalie AU - Michaletz, Sean T AU - Stockton, Elizabeth A AU - Vigil, Miguel AU - McDowell, Nate G AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Y1 - 2017/01// PY - 2017 DA - January 2017 SP - 163 EP - 175 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 105 IS - 1 SN - 0022-0477, 0022-0477 KW - Environment Abstracts; Ecology Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Ecosystems KW - Photosynthesis KW - Trees KW - Rainfall KW - Physiology KW - Climatic changes KW - Climate change KW - Water availability KW - Air temperature KW - Water KW - Models KW - Soil KW - Needles KW - Stomata KW - Soils KW - Plastics KW - Droughts KW - Abiotic factors KW - Atmospheric precipitations KW - Temperature effects KW - Conductance KW - Leaves KW - Environmental impact KW - Stress KW - Precipitation KW - Shoots KW - Elongation KW - Water use KW - Semiarid environments KW - Morphology KW - Pinus edulis KW - Environmental conditions KW - Soil moisture KW - D 04040:Ecosystem and Ecology Studies KW - Q1 08604:Stock assessment and management KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859489195?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Ecology&rft.atitle=Precipitation%2C+not+air+temperature%2C+drives+functional+responses+of+trees+in+semi-arid+ecosystems&rft.au=Grossiord%2C+Charlotte%3BSevanto%2C+Sanna%3BAdams%2C+Henry+D%3BCollins%2C+Adam+D%3BDickman%2C+Lee+T%3BMcBranch%2C+Natalie%3BMichaletz%2C+Sean+T%3BStockton%2C+Elizabeth+A%3BVigil%2C+Miguel%3BMcDowell%2C+Nate+G&rft.aulast=Grossiord&rft.aufirst=Charlotte&rft.date=2017-01-01&rft.volume=105&rft.issue=1&rft.spage=163&rft.isbn=&rft.btitle=&rft.title=Journal+of+Ecology&rft.issn=00220477&rft_id=info:doi/10.1111%2F1365-2745.12662 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-01-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Temperature effects; Atmospheric precipitations; Climate change; Soils; Environmental impact; Droughts; Water; Air temperature; Abiotic factors; Photosynthesis; Trees; Conductance; Climatic changes; Leaves; Stress; Precipitation; Water availability; Models; Shoots; Water use; Elongation; Stomata; Morphology; Plastics; Soil moisture; Environmental conditions; Ecosystems; Rainfall; Physiology; Needles; Soil; Semiarid environments; Pinus edulis DO - http://dx.doi.org/10.1111/1365-2745.12662 ER - TY - JOUR T1 - Warming combined with more extreme precipitation regimes modifies the water sources used by trees AN - 1859471947; PQ0003986189 AB - * The persistence of vegetation under climate change will depend on a plant's capacity to exploit water resources. We analyzed water source dynamics in pinon pine and juniper trees subjected to precipitation reduction, atmospheric warming, and to both simultaneously. * Pinon and juniper exhibited different and opposite shifts in water uptake depth in response to experimental stress and background climate over 3 yr. During a dry summer, juniper responded to warming with a shift to shallow water sources, whereas pinon pine responded to precipitation reduction with a shift to deeper sources in autumn. In normal and wet summers, both species responded to precipitation reduction, but juniper increased deep water uptake and pinon increased shallow water uptake. * Shifts in the utilization of water sources were associated with reduced stomatal conductance and photosynthesis, suggesting that belowground compensation in response to warming and water reduction did not alleviate stress impacts for gas exchange. * We have demonstrated that predicted climate change could modify water sources of trees. Warming impairs juniper uptake of deep sources during extended dry periods. Precipitation reduction alters the uptake of shallow sources following extended droughts for pinon. Shifts in water sources may not compensate for climate change impacts on tree physiology. JF - New Phytologist AU - Grossiord, Charlotte AU - Sevanto, Sanna AU - Dawson, Todd E AU - Adams, Henry D AU - Collins, Adam D AU - Dickman, Lee T AU - Newman, Brent D AU - Stockton, Elizabeth A AU - McDowell, Nate G AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA. Y1 - 2017/01// PY - 2017 DA - January 2017 SP - 584 EP - 596 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 213 IS - 2 SN - 0028-646X, 0028-646X KW - ASFA 1: Biological Sciences & Living Resources; Biotechnology and Bioengineering Abstracts KW - Atmospheric precipitations KW - Gas exchange KW - Photosynthesis KW - Trees KW - Conductance KW - Climatic changes KW - Climate change KW - Climate KW - Autumn KW - Vegetation KW - Water resources KW - Precipitation KW - Water KW - Deep water KW - Water uptake KW - Stomata KW - Shallow water KW - Uptake KW - Droughts KW - W 30930:Agricultural Applications KW - Q1 08604:Stock assessment and management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859471947?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=New+Phytologist&rft.atitle=Warming+combined+with+more+extreme+precipitation+regimes+modifies+the+water+sources+used+by+trees&rft.au=Grossiord%2C+Charlotte%3BSevanto%2C+Sanna%3BDawson%2C+Todd+E%3BAdams%2C+Henry+D%3BCollins%2C+Adam+D%3BDickman%2C+Lee+T%3BNewman%2C+Brent+D%3BStockton%2C+Elizabeth+A%3BMcDowell%2C+Nate+G&rft.aulast=Grossiord&rft.aufirst=Charlotte&rft.date=2017-01-01&rft.volume=213&rft.issue=2&rft.spage=584&rft.isbn=&rft.btitle=&rft.title=New+Phytologist&rft.issn=0028646X&rft_id=info:doi/10.1111%2Fnph.14192 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-01-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Gas exchange; Atmospheric precipitations; Shallow water; Climate; Climate change; Autumn; Water resources; Uptake; Water; Water uptake; Stomata; Photosynthesis; Conductance; Trees; Climatic changes; Vegetation; Precipitation; Droughts; Deep water DO - http://dx.doi.org/10.1111/nph.14192 ER - TY - JOUR T1 - Robust data transmission and recovery of images by compressed sensing for structural health diagnosis AN - 1855074477; PQ0003949999 AB - Digital cameras are cost-effective vision sensors and able to directly provide two-dimensional information of structural condition in monitoring and assessment applications. For example, digital cameras are essential components of unmanned aerial vehicles (UAVs) and robotic agents for mobile sensing and inspection of pipelines, buildings, transportation infrastructure, etc, especially in post-natural disaster and man-made extreme events assessment. Additionally, while surveillance cameras have been widely used for transportation systems (e.g., traffic monitoring), if appropriately mounted on the large-scale structures such as the bridges, they can continuously monitor the structural condition under operational loads and hazards, complementing the regular visual inspection and assessment conducted by experts. In these or other applications, efficiently and reliably transferring the structural images or videos, which are as such large-scale, are important and challenging, especially in wireless platform that is either required (e.g., UAVs and robotic agents) or more suitable (e.g., camera monitoring networks) with only limited power and communication resources. This paper studies the computational algorithms for efficient and reliable transmission of the structural monitoring images; in particular, the compressed sensing (CS) technique is explored for robust data transmission and recovery. The sparse representation or data structure of the structural images is exploited, leading to the CS based central strategy: on some sparse domain, randomly encode large-scale image data into few relevant coefficients, which are then transferred (robust to random data loss) and recovered (in base station) for subsequent structural health diagnosis. Image data of bench scale pipe structure, concrete structure and full scale stay cable are employed for validation of the CS based method. Its performance is also compared with traditional transform coding and low-dimensional encoding (sampling), and their advantages and drawbacks are discussed. JF - Structural Control and Health Monitoring (Online) AU - Yang, Yongchao AU - Nagarajaiah, Satish AD - Department of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA; currently at Engineering Institute, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Y1 - 2017/01// PY - 2017 DA - January 2017 SP - [np] PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 24 IS - 1 SN - 1545-2255, 1545-2255 KW - Environment Abstracts KW - Pipes KW - Bridges KW - Sensors KW - Disasters KW - Data transmission KW - Buildings KW - Infrastructure KW - Communications KW - Transportation KW - Vision KW - Economics KW - Exploitation KW - Pipelines KW - Inspection KW - ENA 18:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855074477?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Structural+Control+and+Health+Monitoring+%28Online%29&rft.atitle=Robust+data+transmission+and+recovery+of+images+by+compressed+sensing+for+structural+health+diagnosis&rft.au=Yang%2C+Yongchao%3BNagarajaiah%2C+Satish&rft.aulast=Yang&rft.aufirst=Yongchao&rft.date=2017-01-01&rft.volume=24&rft.issue=1&rft.spage=%5Bnp%5D&rft.isbn=&rft.btitle=&rft.title=Structural+Control+and+Health+Monitoring+%28Online%29&rft.issn=15452255&rft_id=info:doi/10.1002%2Fstc.1856 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-01-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Pipes; Bridges; Sensors; Data transmission; Disasters; Buildings; Infrastructure; Transportation; Communications; Vision; Economics; Pipelines; Exploitation; Inspection DO - http://dx.doi.org/10.1002/stc.1856 ER - TY - JOUR T1 - Original Research: Evaluation of pulmonary response to inhaled tungsten (IV) oxide nanoparticles in golden Syrian hamsters. AN - 1846365595; 27534980 AB - Extensive industrial and military uses of tungsten have raised the possibilities of human occupational and environmental exposure to nanoparticles of this metal, with concomitant health concerns. The goal of this study was to investigate the potential mechanism of pulmonary toxicity associated with inhaled tungsten (IV) oxide nanoparticles (WO3 NPs) in Golden Syrian Hamsters. Animals exposed to WO3 NPs via inhalation were divided into three groups - control and two treatment groups exposed to either 5 or 10 mg/m3 of aerosolized WO3 NPs for 4 h/day for four days. A long-term exposure study (4 h/day for eight days) was also carried out using an additional three groups. Pulmonary toxicity assessed by examining changes in cell numbers, lactate dehydrogenase activity, alkaline phosphatase activity, total protein content, TNF-α, and HMGB1 levels in bronchoalveolar lavage fluids showed a significant difference when compared to control (P < 0.05). The molecular mechanism was established by assessing protein expression of cathepsin B, TXNIP, NLRP3, ASC, IL-1β and caspase-1. Western blot analysis indicated a 1.5 and 1.7 fold changes in NLRP3 in treatment groups (5 mg/m3, P < 0.05 and 10 mg/m3, P < 0.01, respectively), whereas levels of cathepsin B were 1.3 fold higher in lung tissue exposed to WO3 NPs suggesting activation of inflammasome pathway. Morphological changes studied using light and electron microscopy showed localization of nanoparticles and subsequent perturbation in airway epithelia, macrophages, and interstitial areas of alveolar structures. Results from the current study indicate that inhalation exposure to WO3 NPs may induce cytotoxicity, morphological changes, and lung injury via pyroptotic cell death pathway caused by activation of caspase-1. JF - Experimental biology and medicine (Maywood, N.J.) AU - Prajapati, Milankumar V AU - Adebolu, Olujoba O AU - Morrow, Benjamin M AU - Cerreta, Joseph M AD - College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA. ; Materials Science & Technology, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. ; College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA cerretaj@stjohns.edu. Y1 - 2017/01// PY - 2017 DA - January 2017 SP - 29 EP - 44 VL - 242 IS - 1 KW - inflammasome KW - inhalation KW - Tungsten oxide KW - nanoparticles UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846365595?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Experimental+biology+and+medicine+%28Maywood%2C+N.J.%29&rft.atitle=Original+Research%3A+Evaluation+of+pulmonary+response+to+inhaled+tungsten+%28IV%29+oxide+nanoparticles+in+golden+Syrian+hamsters.&rft.au=Prajapati%2C+Milankumar+V%3BAdebolu%2C+Olujoba+O%3BMorrow%2C+Benjamin+M%3BCerreta%2C+Joseph+M&rft.aulast=Prajapati&rft.aufirst=Milankumar&rft.date=2017-01-01&rft.volume=242&rft.issue=1&rft.spage=29&rft.isbn=&rft.btitle=&rft.title=Experimental+biology+and+medicine+%28Maywood%2C+N.J.%29&rft.issn=1535-3699&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-08-18 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 ER - TY - JOUR T1 - Two-phase deformation of lower mantle mineral analogs AN - 1863566718; 2017-008710 AB - The lower mantle is estimated to be composed of mostly bridgmanite and a smaller percentage of ferropericlase, yet very little information exists for two-phase deformation of these minerals. To better understand the rheology and active deformation mechanisms of these lower mantle minerals, especially dislocation slip and the development of crystallographic preferred orientation (CPO), we deformed mineral analogs neighborite (NaMgF (sub 3) , iso-structural with bridgmanite) and halite (NaCl, iso-structural with ferropericlase) together in the deformation-DIA at the Advanced Photon Source up to 51% axial shortening. Development of CPO was recorded in situ with X-ray diffraction, and information on microstructural evolution was collected using X-ray microtomography. Results show that when present in as little as 15% volume, the weak phase (NaCl) controls the deformation. Compared to single phase NaMgF (sub 3) samples, samples with just 15% volume NaCl show a reduction of CPO in NaMgF (sub 3) and weakening of the aggregate. Microtomography shows both NaMgF (sub 3) and NaCl form highly interconnected networks of grains. Polycrystal plasticity simulations were carried out to gain insight into slip activity, CPO evolution, and strain and stress partitioning between phases for different synthetic two-phase microstructures. The results suggest that ferropericlase may control deformation in the lower mantle and reduce CPO in bridgmanite, which implies a less viscous lower mantle and helps to explain why the lower mantle is fairly isotropic. JF - Earth and Planetary Science Letters AU - Kaercher, P AU - Miyagi, L AU - Kanitpanyacharoen, W AU - Zepeda-Alarcon, E AU - Wang, Y AU - Parkinson, D AU - Lebensohn, R A AU - De Carlo, F AU - Wenk, H R Y1 - 2016/12/15/ PY - 2016 DA - 2016 Dec 15 SP - 134 EP - 145 PB - Elsevier, Amsterdam VL - 456 SN - 0012-821X, 0012-821X KW - halides KW - fluorides KW - X-ray diffraction data KW - strain KW - microstructure KW - mantle KW - crystal structure KW - neighborite KW - preferred orientation KW - lower mantle KW - rheology KW - chlorides KW - oxides KW - plasticity KW - sodium chloride KW - experimental studies KW - pressure KW - structural analysis KW - stress KW - X-ray microtomography KW - deformation KW - high pressure KW - halite KW - X-ray data KW - viscosity KW - natural analogs KW - anvil cells KW - computed tomography data KW - ferropericlase KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1863566718?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+and+Planetary+Science+Letters&rft.atitle=Two-phase+deformation+of+lower+mantle+mineral+analogs&rft.au=Kaercher%2C+P%3BMiyagi%2C+L%3BKanitpanyacharoen%2C+W%3BZepeda-Alarcon%2C+E%3BWang%2C+Y%3BParkinson%2C+D%3BLebensohn%2C+R+A%3BDe+Carlo%2C+F%3BWenk%2C+H+R&rft.aulast=Kaercher&rft.aufirst=P&rft.date=2016-12-15&rft.volume=456&rft.issue=&rft.spage=134&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2016.09.030 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2017-01-01 N1 - Number of references - 56 N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendix N1 - Last updated - 2017-02-02 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - anvil cells; chlorides; computed tomography data; crystal structure; deformation; experimental studies; ferropericlase; fluorides; halides; halite; high pressure; lower mantle; mantle; microstructure; natural analogs; neighborite; oxides; plasticity; preferred orientation; pressure; rheology; sodium chloride; strain; stress; structural analysis; viscosity; X-ray data; X-ray diffraction data; X-ray microtomography DO - http://dx.doi.org/10.1016/j.epsl.2016.09.030 ER - TY - JOUR T1 - Isotopic constraints on the genesis and evolution of basanitic lavas at Haleakala, Island of Maui, Hawaii AN - 1861095570; 786675-11 AB - To understand the dynamics of solid mantle upwelling and melting in the Hawaiian plume, we present new major and trace element data, Nd, Sr, Hf, and Pb isotopic compositions, and (super 238) U- (super 230) Th- (super 226) Ra and (super 235) U- (super 231) Pa- (super 227) Ac activities for 13 Haleakala Crater nepheline normative basanites with ages ranging from approximately 900 to 4100 yr B.P. These basanites of the Hana Volcanics exhibit an enrichment in incompatible trace elements and a more depleted isotopic signature than similarly aged Hawaiian shield lavas from Kilauea and Mauna Loa. Here we posit that as the Pacific lithosphere beneath the active shield volcanoes moves away from the center of the Hawaiian plume, increased incorporation of an intrinsic depleted component with relatively low (super 206) Pb/ (super 204) Pb produces the source of the basanites of the Hana Volcanics. Haleakala Crater basanites have average ( (super 230) Th/ (super 238) U) of 1.23 (n = 13), average age-corrected ( (super 226) Ra/ (super 230) Th) of 1.25 (n = 13), and average ( (super 231) Pa/ (super 235) U) of 1.67 (n = 4), significantly higher than Kilauea and Mauna Loa tholeiites. U-series modeling shows that solid mantle upwelling velocity for Haleakala Crater basanites ranges from approximately 0.7 to 1.0 cm/yr, compared to approximately 10 to 20 cm/yr for tholeiites and approximately 1 to 2 cm/yr for alkali basalts. These modeling results indicate that solid mantle upwelling rates and porosity of the melting zone are lower for Hana Volcanics basanites than for shield-stage tholeiites from Kilauea and Mauna Loa and alkali basalts from Hualalai. The melting rate, which is directly proportional to both the solid mantle upwelling rate and the degree of melting, is therefore greatest in the center of the Hawaiian plume and lower on its periphery. Our results indicate that solid mantle upwelling velocity is at least 10 times higher at the center of the plume than at its periphery under Haleakala. JF - Geochimica et Cosmochimica Acta AU - Phillips, Erin H AU - Sims, Kenneth W W AU - Sherrod, David R AU - Salters, Vincent J M AU - Blusztajn, Jurek AU - Dulai, Henrietta Y1 - 2016/12/15/ PY - 2016 DA - 2016 Dec 15 SP - 201 EP - 225 PB - Elsevier, New York, NY VL - 195 SN - 0016-7037, 0016-7037 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861095570?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Isotopic+constraints+on+the+genesis+and+evolution+of+basanitic+lavas+at+Haleakala%2C+Island+of+Maui%2C+Hawaii&rft.au=Phillips%2C+Erin+H%3BSims%2C+Kenneth+W+W%3BSherrod%2C+David+R%3BSalters%2C+Vincent+J+M%3BBlusztajn%2C+Jurek%3BDulai%2C+Henrietta&rft.aulast=Phillips&rft.aufirst=Erin&rft.date=2016-12-15&rft.volume=195&rft.issue=&rft.spage=201&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2016.08.017 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - PubXState - NY N1 - Last updated - 2017-01-24 N1 - CODEN - GCACAK DO - http://dx.doi.org/10.1016/j.gca.2016.08.017 ER - TY - JOUR T1 - An ecology-oriented exploitation mode of ground water resources in the northern Tian Shan Mountains, China AN - 1873350389; 2017-015668 AB - In recent years, ecological degradation caused by irrational groundwater exploitation has been of growing concern in arid and semiarid regions. To address the groundwater-ecological issues, this paper proposes a groundwater-resource exploitation mode to evaluate the tradeoff between groundwater development and ecological environment in the northern Tianshan Mountains, northwest China's Xinjiang Uygur Autonomous Region. Field surveys and remote sensing studies were conducted to analyze the relation between the distribution of hydrological conditions and the occurrence of ecological types. The results show that there is a good correlation between groundwater depth and the supergene ecological type. Numerical simulations and ecological assessment models were applied to develop an ecology-oriented exploitation mode of groundwater resources. The mode allows the groundwater levels in different zones to be regulated by optimizing groundwater exploitation modes. The prediction results show that the supergene ecological quality will be better in 2020 and even more groundwater can be exploited in this mode. This study provides guidance for regional groundwater management, especially in regions with an obvious water scarcity. JF - Journal of Hydrology AU - Shang, Haimin AU - Wang, Wenke AU - Dai, Zhenxue AU - Duan, Lei AU - Zhao, Yaqian AU - Zhang, Jing Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 386 EP - 394 PB - Elsevier, Amsterdam VL - 543 IS - Part B SN - 0022-1694, 0022-1694 KW - terrestrial environment KW - Far East KW - finite difference analysis KW - rivers and streams KW - water management KW - Tien Shan KW - Xinjiang China KW - exploitation KW - ecosystems KW - simulation KW - ground water KW - environmental management KW - geographic information systems KW - northwestern China KW - drainage basins KW - Asia KW - China KW - Manas River KW - Kuitun River KW - Junggar Basin KW - Hutubi River KW - northern Tien Shan KW - southern Junggar Basin KW - rainfall KW - arid environment KW - optimization KW - Urumqi River KW - correlation KW - equations KW - satellite methods KW - aquifers KW - models KW - Landsat KW - mathematical methods KW - information systems KW - water resources KW - remote sensing KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350389?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology&rft.atitle=An+ecology-oriented+exploitation+mode+of+ground+water+resources+in+the+northern+Tian+Shan+Mountains%2C+China&rft.au=Shang%2C+Haimin%3BWang%2C+Wenke%3BDai%2C+Zhenxue%3BDuan%2C+Lei%3BZhao%2C+Yaqian%3BZhang%2C+Jing&rft.aulast=Shang&rft.aufirst=Haimin&rft.date=2016-12-01&rft.volume=543&rft.issue=Part+B&rft.spage=386&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2016.10.012 L2 - http://www.sciencedirect.com/science/journal/00221694 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2017-01-01 N1 - Number of references - 66 N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - Last updated - 2017-03-02 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - aquifers; arid environment; Asia; China; correlation; drainage basins; ecosystems; environmental management; equations; exploitation; Far East; finite difference analysis; geographic information systems; ground water; Hutubi River; information systems; Junggar Basin; Kuitun River; Landsat; Manas River; mathematical methods; models; northern Tien Shan; northwestern China; optimization; rainfall; remote sensing; rivers and streams; satellite methods; simulation; southern Junggar Basin; terrestrial environment; Tien Shan; Urumqi River; water management; water resources; Xinjiang China DO - http://dx.doi.org/10.1016/j.jhydrol.2016.10.012 ER - TY - JOUR T1 - Modeling the influence of preferential flow on the spatial variability and time-dependence of mineral weathering rates AN - 1868308693; PQ0004053694 AB - Inferences of weathering rates from laboratory and field observations suggest significant scale and time-dependence. Preferential flow induced by heterogeneity (manifest as permeability variations or discrete fractures) has been suggested as one potential mechanism causing scale/time-dependence. We present a quantitative evaluation of the influence of preferential flow on weathering rates using reactive transport modeling. Simulations were performed in discrete fracture networks (DFNs) and correlated random permeability fields (CRPFs), and compared to simulations in homogeneous permeability fields. The simulations reveal spatial variability in the weathering rate, multidimensional distribution of reactions zones, and the formation of rough weathering interfaces and corestones due to preferential flow. In the homogeneous fields and CRPFs, the domain-averaged weathering rate is initially constant as long as the weathering front is contained within the domain, reflecting equilibrium-controlled behavior. The behavior in the CRPFs was influenced by macrodispersion, with more spread-out weathering profiles, an earlier departure from the initial constant rate and longer persistence of weathering. DFN simulations exhibited a sustained time-dependence resulting from the formation of diffusion-controlled weathering fronts in matrix blocks, which is consistent with the shrinking core mechanism. A significant decrease in the domain-averaged weathering rate is evident despite high remaining mineral volume fractions, but the decline does not follow a [Formulaomitted] dependence, characteristic of diffusion, due to network scale effects and advection-controlled behavior near the inflow boundary. The DFN simulations also reveal relatively constant horizontally averaged weathering rates over a significant depth range, challenging the very notion of a weathering front. Key Points * Weathering rates in the Critical Zone are shown to be influenced by the type and degree of preferential flow * Time and scale dependence of weathering is partially explained by preferential flow through connected fractures * Behavior in discrete fracture networks and random permeability fields is related to departure from equilibrium-controlled behavior JF - Water Resources Research AU - Pandey, Sachin AU - Rajaram, Harihar AD - Los Alamos National Laboratory Computational Earth Sciences (EES-16), Los Alamos, New Mexico, USA. Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 9344 EP - 9366 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 52 IS - 12 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Variability KW - Geographical distribution KW - Behaviour KW - Water resources KW - Current observations KW - Evaluation KW - Spatial variations KW - Permeability KW - Weathering KW - Heterogeneity KW - Spatial variability KW - Modelling KW - Simulation Analysis KW - Fractures KW - Numerical simulations KW - Fronts KW - Boundaries KW - Preferential Flow KW - Water resources research KW - Minerals KW - AQ 00001:Water Resources and Supplies KW - SW 0810:General KW - M2 556.18:Water Management (556.18) KW - Q2 09261:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1868308693?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Modeling+the+influence+of+preferential+flow+on+the+spatial+variability+and+time-dependence+of+mineral+weathering+rates&rft.au=Pandey%2C+Sachin%3BRajaram%2C+Harihar&rft.aulast=Pandey&rft.aufirst=Sachin&rft.date=2016-12-01&rft.volume=52&rft.issue=12&rft.spage=9344&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2016WR019026 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-02-01 N1 - Last updated - 2017-03-01 N1 - SubjectsTermNotLitGenreText - Spatial variations; Permeability; Geographical distribution; Behaviour; Fractures; Water resources; Weathering; Current observations; Modelling; Fronts; Numerical simulations; Water resources research; Spatial variability; Evaluation; Variability; Simulation Analysis; Boundaries; Preferential Flow; Heterogeneity; Minerals DO - http://dx.doi.org/10.1002/2016WR019026 ER - TY - JOUR T1 - Push-pull tracer tests: Their information content and use for characterizing non-Fickian, mobile-immobile behavior AN - 1868302181; PQ0004053701 AB - Path reversibility and radial symmetry are often assumed in push-pull tracer test analysis. In reality, heterogeneous flow fields mean that both assumptions are idealizations. To understand their impact, we perform a parametric study which quantifies the scattering effects of ambient flow, local-scale dispersion, and velocity field heterogeneity on push-pull breakthrough curves and compares them to the effects of mobile-immobile mass transfer (MIMT) processes including sorption and diffusion into secondary porosity. We identify specific circumstances in which MIMT overwhelmingly determines the breakthrough curve, which may then be considered uninformative about drift and local-scale dispersion. Assuming path reversibility, we develop a continuous-time-random-walk-based interpretation framework which is flow-field-agnostic and well suited to quantifying MIMT. Adopting this perspective, we show that the radial flow assumption is often harmless: to the extent that solute paths are reversible, the breakthrough curve is uninformative about velocity field heterogeneity. Our interpretation method determines a mapping function (i.e., subordinator) from travel time in the absence of MIMT to travel time in its presence. A mathematical theory allowing this function to be directly "plugged into" an existing Laplace-domain transport model to incorporate MIMT is presented and demonstrated. Algorithms implementing the calibration are presented and applied to interpretation of data from a push-pull test performed in a heterogeneous environment. A successful four-parameter fit is obtained, of comparable fidelity to one obtained using a million-node 3-D numerical model. Finally, we demonstrate analytically and numerically how push-pull tests quantifying MIMT are sensitive to remobilization, but not immobilization, kinetics. Key Points * Which information about transport properties is visible to push-pull tests (PPTs), and which is not, is determined * A flow-field-agnostic conceptual model is developed for quantification of mobile-immobile behavior from PPTs * Methods for PPT characterization of mass transfer rates and use in linear non-Fickian transport models are developed JF - Water Resources Research AU - Hansen, Scott K AU - Berkowitz, Brian AU - Vesselinov, Velimir V AU - O'Malley, Daniel AU - Karra, Satish AD - Computational Earth Sciences Group (EES-16), Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 9565 EP - 9585 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 52 IS - 12 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Flow KW - Behaviour KW - Algorithms KW - Water resources KW - Tracers KW - Solutes KW - Numerical models KW - Calibrations KW - Heterogeneity KW - Modelling KW - Mathematical models KW - Mass Transfer KW - Velocity KW - Traveltime KW - Methodology KW - Mass transfer KW - Water resources research KW - Water Resources KW - Dispersion KW - AQ 00001:Water Resources and Supplies KW - Q2 09127:General papers on resources KW - SW 0810:General KW - M2 556.18:Water Management (556.18) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1868302181?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Push-pull+tracer+tests%3A+Their+information+content+and+use+for+characterizing+non-Fickian%2C+mobile-immobile+behavior&rft.au=Hansen%2C+Scott+K%3BBerkowitz%2C+Brian%3BVesselinov%2C+Velimir+V%3BO%27Malley%2C+Daniel%3BKarra%2C+Satish&rft.aulast=Hansen&rft.aufirst=Scott&rft.date=2016-12-01&rft.volume=52&rft.issue=12&rft.spage=9565&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2016WR018769 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-02-01 N1 - Last updated - 2017-03-01 N1 - SubjectsTermNotLitGenreText - Solutes; Tracers; Mathematical models; Behaviour; Water resources; Mass transfer; Dispersion; Methodology; Modelling; Numerical models; Algorithms; Water resources research; Flow; Calibrations; Mass Transfer; Velocity; Traveltime; Heterogeneity; Water Resources DO - http://dx.doi.org/10.1002/2016WR018769 ER - TY - JOUR T1 - SALSA3D; a tomographic model of compressional wave slowness in the earth's mantle for improved travel-time prediction and travel-time prediction uncertainty AN - 1859791432; 2017-006013 AB - The task of monitoring the Earth for nuclear explosions relies heavily on seismic data to detect, locate, and characterize suspected nuclear tests. Motivated by the need to locate suspected explosions as accurately and precisely as possible, we developed a tomographic model of the compressional wave slowness in the Earth's mantle with primary focus on the accuracy and precision of travel-time predictions for P and Pn ray paths through the model. Path-dependent travel-time prediction uncertainties are obtained by computing the full 3D model covariance matrix and then integrating slowness variance and covariance along ray paths from source to receiver. Path-dependent travel-time prediction uncertainties reflect the amount of seismic data that was used in tomography with very low values for paths represented by abundant data in the tomographic data set and very high values for paths through portions of the model that were poorly sampled by the tomography data set. The pattern of travel-time prediction uncertainty is a direct result of the off-diagonal terms of the model covariance matrix and underscores the importance of incorporating the full model covariance matrix in the determination of travel-time prediction uncertainty. The computed pattern of uncertainty differs significantly from that of 1D distance-dependent travel-time uncertainties computed using traditional methods, which are only appropriate for use with travel times computed through 1D velocity models. JF - Bulletin of the Seismological Society of America AU - Ballard, Sanford AU - Hipp, James R AU - Begnaud, Michael L AU - Young, Christopher J AU - Encarnacao, Andre V AU - Chael, Eric P AU - Phillips, W Scott Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 2900 EP - 2916 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 6 SN - 0037-1106, 0037-1106 KW - tomography KW - P-waves KW - body waves KW - numerical models KW - three-dimensional models KW - explosions KW - Bayesian analysis KW - statistical analysis KW - mantle KW - elastic waves KW - core-mantle boundary KW - Mohorovicic discontinuity KW - outer core KW - lower mantle KW - traveltime KW - velocity KW - SALSA3D KW - propagation KW - core KW - seismic waves KW - nuclear explosions KW - 18:Solid-earth geophysics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859791432?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=SALSA3D%3B+a+tomographic+model+of+compressional+wave+slowness+in+the+earth%27s+mantle+for+improved+travel-time+prediction+and+travel-time+prediction+uncertainty&rft.au=Ballard%2C+Sanford%3BHipp%2C+James+R%3BBegnaud%2C+Michael+L%3BYoung%2C+Christopher+J%3BEncarnacao%2C+Andre+V%3BChael%2C+Eric+P%3BPhillips%2C+W+Scott&rft.aulast=Ballard&rft.aufirst=Sanford&rft.date=2016-12-01&rft.volume=106&rft.issue=6&rft.spage=2900&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ L2 - http://bssa.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2017-01-01 N1 - Number of references - 46 N1 - PubXState - CA N1 - Document feature - illus. N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - Bayesian analysis; body waves; core; core-mantle boundary; elastic waves; explosions; lower mantle; mantle; Mohorovicic discontinuity; nuclear explosions; numerical models; outer core; P-waves; propagation; SALSA3D; seismic waves; statistical analysis; three-dimensional models; tomography; traveltime; velocity DO - http://dx.doi.org/10.1785/0120150271 ER - TY - JOUR T1 - A Case Study of the Weather Research and Forecasting Model Applied to the Joint Urban 2003 Tracer Field Experiment. Part 2: Gas Tracer Dispersion AN - 1846418240; PQ0003887007 AB - The Quick Urban & Industrial Complex (QUIC) atmospheric transport, and dispersion modelling, system was evaluated against the Joint Urban 2003 tracer-gas measurements. This was done using the wind and turbulence fields computed by the Weather Research and Forecasting (WRF) model. We compare the simulated and observed plume transport when using WRF-model-simulated wind fields, and local on-site wind measurements. Degradation of the WRF-model-based plume simulations was cased by errors in the simulated wind direction, and limitations in reproducing the small-scale wind-field variability. We explore two methods for importing turbulence from the WRF model simulations into the QUIC system. The first method uses parametrized turbulence profiles computed from WRF-model-computed boundary-layer similarity parameters; and the second method directly imports turbulent kinetic energy from the WRF model. Using the WRF model's Mellor-Yamada-Janjic boundary-layer scheme, the parametrized turbulence profiles and the direct import of turbulent kinetic energy were found to overpredict and underpredict the observed turbulence quantities, respectively. Near-source building effects were found to propagate several km downwind. These building effects and the temporal/spatial variations in the observed wind field were often found to have a stronger influence over the lateral and vertical plume spread than the intensity of turbulence. Correcting the WRF model wind directions using a single observational location improved the performance of the WRF-model-based simulations, but using the spatially-varying flow fields generated from multiple observation profiles generally provided the best performance. JF - Boundary-Layer Meteorology AU - Nelson, Matthew A AU - Brown, Michael J AU - Halverson, Scot A AU - Bieringer, Paul E AU - Annunzio, Andrew AU - Bieberbach, George AU - Meech, Scott AD - Los Alamos National Laboratory, PO Box 1663, MS F609, Los Alamos, NM, 87545, USA, nelsonm@lanl.gov Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 461 EP - 490 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 161 IS - 3 SN - 0006-8314, 0006-8314 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts KW - Prediction KW - Atmospheric pollution models KW - Wind measurement KW - Turbulent kinetic energy KW - turbulence KW - Wind fields KW - Kinetic Energy KW - Spatial variations KW - Tracers KW - Atmospheric transport KW - Wind measurements KW - Forecasting KW - Plumes KW - Weather forecasting KW - Wind KW - Dispersion of gases KW - Modelling KW - Weather KW - Wind shear KW - Turbulence fields KW - Simulation Analysis KW - Wind direction KW - Buildings KW - Methodology KW - Numerical simulations KW - Turbulence profiles KW - Dispersion models KW - Dispersion KW - SW 0810:General KW - O 6030:Oil and Gas Resources KW - Q2 09244:Air-sea coupling KW - M2 551.509.1/.5:Forecasting (551.509.1/.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846418240?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Boundary-Layer+Meteorology&rft.atitle=A+Case+Study+of+the+Weather+Research+and+Forecasting+Model+Applied+to+the+Joint+Urban+2003+Tracer+Field+Experiment.+Part+2%3A+Gas+Tracer+Dispersion&rft.au=Nelson%2C+Matthew+A%3BBrown%2C+Michael+J%3BHalverson%2C+Scot+A%3BBieringer%2C+Paul+E%3BAnnunzio%2C+Andrew%3BBieberbach%2C+George%3BMeech%2C+Scott&rft.aulast=Nelson&rft.aufirst=Matthew&rft.date=2016-12-01&rft.volume=161&rft.issue=3&rft.spage=461&rft.isbn=&rft.btitle=&rft.title=Boundary-Layer+Meteorology&rft.issn=00068314&rft_id=info:doi/10.1007%2Fs10546-016-0188-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Number of references - 43 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Spatial variations; Prediction; Tracers; Wind measurement; Weather forecasting; Wind fields; Dispersion; Methodology; Modelling; Wind shear; Atmospheric transport; Turbulence fields; Atmospheric pollution models; Turbulence profiles; Numerical simulations; Wind measurements; Turbulent kinetic energy; Dispersion models; Wind direction; Dispersion of gases; Weather; Simulation Analysis; Forecasting; turbulence; Buildings; Plumes; Wind; Kinetic Energy DO - http://dx.doi.org/10.1007/s10546-016-0188-z ER - TY - JOUR T1 - Self-feeding paper based biofuel cell/self-powered hybrid mu -supercapacitor integrated system AN - 1827910934; PQ0003662292 AB - For the first time, a paper based enzymatic fuel cell is used as self-recharged supercapacitor. In this supercapacitive enzymatic fuel cell (SC-EFC), the supercapacitive features of the electrodes are exploited to demonstrate high power output under pulse operation. Glucose dehydrogenase-based anode and bilirubin oxidase-based cathode were assembled to a quasi-2D capillary-driven microfluidic system. Capillary flow guarantees the continuous supply of glucose, cofactor and electrolytes to the anodic enzyme and the gas-diffusional cathode design provides the passive supply of oxygen to the catalytic layer of the electrode. The paper-based cell was self-recharged under rest and discharged by high current pulses up to 4mAcm-2. The supercapacitive behavior and low equivalent series resistance of the cell permitted to achieve up to a maximum power of 0.87mWcm-2 (10.6mW) for pulses of 0.01s at 4mAcm-2. This operation mode allowed the system to achieve at least one order of magnitude higher current/power generation compared to the steady state operation. JF - Biosensors and Bioelectronics AU - Narvaez Villarrubia, Claudia W AU - Soavi, Francesca AU - Santoro, Carlo AU - Arbizzani, Catia AU - Serov, Alexey AU - Rojas-Carbonell, Santiago AU - Gupta, Gautam AU - Atanassov, Plamen AD - MPA-11 Material Synthesis and Integrated Devices, Los Alamos National Laboratory, Los Alamos, NM, USA Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 459 EP - 465 PB - Elsevier B.V., 660 White Plains Rd. Tarrytown NY 10591-5153 United States VL - 86 SN - 0956-5663, 0956-5663 KW - Biotechnology and Bioengineering Abstracts KW - Enzymatic fuel cell KW - Supercapacitor KW - Paper-based microfluidic system KW - Power pulses KW - Cathodes KW - fuel cells KW - Glucose KW - Enzymes KW - Biosensors KW - Oxygen KW - Microfluidics KW - Cofactors KW - Hybrids KW - Anodes KW - Electrodes KW - Bilirubin KW - Biofuels KW - W 30955:Biosensors UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1827910934?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biosensors+and+Bioelectronics&rft.atitle=Self-feeding+paper+based+biofuel+cell%2Fself-powered+hybrid+mu+-supercapacitor+integrated+system&rft.au=Narvaez+Villarrubia%2C+Claudia+W%3BSoavi%2C+Francesca%3BSantoro%2C+Carlo%3BArbizzani%2C+Catia%3BSerov%2C+Alexey%3BRojas-Carbonell%2C+Santiago%3BGupta%2C+Gautam%3BAtanassov%2C+Plamen&rft.aulast=Narvaez+Villarrubia&rft.aufirst=Claudia&rft.date=2016-12-01&rft.volume=86&rft.issue=&rft.spage=459&rft.isbn=&rft.btitle=&rft.title=Biosensors+and+Bioelectronics&rft.issn=09565663&rft_id=info:doi/10.1016%2Fj.bios.2016.06.084 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Last updated - 2016-10-12 N1 - SubjectsTermNotLitGenreText - Cathodes; fuel cells; Glucose; Enzymes; Biosensors; Oxygen; Microfluidics; Cofactors; Hybrids; Electrodes; Anodes; Bilirubin; Biofuels DO - http://dx.doi.org/10.1016/j.bios.2016.06.084 ER - TY - JOUR T1 - Apparent explosion moments from Rg waves recorded on SPE AN - 1859791857; 2017-006040 AB - Seismic moments for the first four chemical tests making up phase I of the Source Physics Experiments (SPE) are estimated from 6-Hz Rg waves recorded along a single radial line of geophones under the assumption that the tests are pure explosions. These apparent explosion moments are compared with moments determined from the reduced displacement potential method applied to free-field data. Light detection and ranging (lidar) observations, strong ground motions on the free surface in the vicinity of ground zero, and moment tensor inversion results are evidence that the fourth test SPE-4P is a pure explosion, and the moments show good agreement, 8X10 (super 10) N.m for free-field data versus 9X10 (super 10) N.m for Rg waves. In stark contrast, apparent moments for the first three tests are smaller than near-field moments by factors of 3-4. Relative amplitudes for the three tests determined from Rg interferometry using SPE-4P as an empirical Green's function indicate that radiation patterns are cylindrically symmetric within a factor of 1.25 (25%). This fact assures that the apparent moments are reliable even though they were measured on just one azimuth. Spallation occurred on the first three tests, and ground-based lidar detected permanent deformations. As such, the source medium suffered late-time damage. Destructive interference between Rg waves radiated by explosion and damage sources will reduce amplitudes and explain why apparent moments are smaller than near-field moments based on compressional energy emitted directly from the source. JF - Bulletin of the Seismological Society of America AU - Larmat, Carene AU - Rougier, Esteban AU - Patton, Howard J Y1 - 2016/11/29/ PY - 2016 DA - 2016 Nov 29 PB - Seismological Society of America, Berkeley, CA VL - Pre-Issue Publication SN - 0037-1106, 0037-1106 KW - United States KW - laser methods KW - igneous rocks KW - chemical explosions KW - granites KW - Green function KW - elastic waves KW - waveforms KW - short-period waves KW - seismic sources KW - surface waves KW - plutonic rocks KW - Rg-waves KW - Nevada KW - faults KW - guided waves KW - explosions KW - seismic moment KW - stress KW - Nye County Nevada KW - Rayleigh waves KW - Mesozoic KW - interferometry KW - moment tensors KW - lidar methods KW - ground motion KW - seismic waves KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859791857?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Apparent+explosion+moments+from+Rg+waves+recorded+on+SPE&rft.au=Larmat%2C+Carene%3BRougier%2C+Esteban%3BPatton%2C+Howard+J&rft.aulast=Larmat&rft.aufirst=Carene&rft.date=2016-11-29&rft.volume=Pre-Issue+Publication&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120160163 L2 - http://bssa.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2017-01-01 N1 - Number of references - 12 N1 - PubXState - CA N1 - Document feature - illus. incl. 3 tables, geol. sketch map N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - chemical explosions; earthquakes; elastic waves; explosions; faults; granites; Green function; ground motion; guided waves; igneous rocks; interferometry; laser methods; lidar methods; Mesozoic; moment tensors; Nevada; Nye County Nevada; plutonic rocks; Rayleigh waves; Rg-waves; seismic moment; seismic sources; seismic waves; short-period waves; stress; surface waves; United States; waveforms DO - http://dx.doi.org/10.1785/0120160163 ER - TY - JOUR T1 - In situ measurement of atmospheric krypton and xenon on Mars with Mars Science Laboratory AN - 1849308149; 2016-110865 AB - Mars Science Laboratory's Sample Analysis at Mars (SAM) investigation has measured all of the stable isotopes of the heavy noble gases krypton and xenon in the martian atmosphere, in situ, from the Curiosity Rover at Gale Crater, Mars. Previous knowledge of martian atmospheric krypton and xenon isotope ratios has been based upon a combination of the Viking mission's krypton and xenon detections and measurements of noble gas isotope ratios in martian meteorites. However, the meteorite measurements reveal an impure mixture of atmospheric, mantle, and spallation contributions. The xenon and krypton isotopic measurements reported here include the complete set of stable isotopes, unmeasured by Viking. The new results generally agree with Mars meteorite measurements but also provide a unique opportunity to identify various non-atmospheric heavy noble gas components in the meteorites. Kr isotopic measurements define a solar-like atmospheric composition, but deviating from the solar wind pattern at (super 80) Kr and (super 82) Kr in a manner consistent with contributions originating from neutron capture in Br. The Xe measurements suggest an intriguing possibility that isotopes lighter than (super 132) Xe have been enriched to varying degrees by spallation and neutron capture products degassed to the atmosphere from the regolith, and a model is constructed to explore this possibility. Such a spallation component, however, is not apparent in atmospheric Xe trapped in the glassy phases of martian meteorites. JF - Earth and Planetary Science Letters AU - Conrad, Pamela G AU - Malespin, C A AU - Franz, H B AU - Pepin, R O AU - Trainer, Melissa G AU - Schwenzer, S P AU - Atreya, S K AU - Freissinet, Caroline AU - Jones, J H AU - Manning, H AU - Owen, T AU - Pavlov, A A AU - Wiens, R C AU - Wong, M H AU - Mahaffy, Paul R Y1 - 2016/11/15/ PY - 2016 DA - 2016 Nov 15 SP - 1 EP - 9 PB - Elsevier, Amsterdam VL - 454 SN - 0012-821X, 0012-821X KW - stony meteorites KW - isotopes KW - Martian meteorites KW - enrichment KW - halogens KW - mass spectra KW - Mars KW - stable isotopes KW - Gale Crater KW - meteorites KW - noble gases KW - mixing KW - Curiosity Rover KW - spectra KW - spallation KW - in situ KW - neutron capture KW - atmosphere KW - bromine KW - xenon KW - krypton KW - achondrites KW - measurement KW - terrestrial planets KW - planets KW - Mars Science Laboratory KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849308149?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+and+Planetary+Science+Letters&rft.atitle=In+situ+measurement+of+atmospheric+krypton+and+xenon+on+Mars+with+Mars+Science+Laboratory&rft.au=Conrad%2C+Pamela+G%3BMalespin%2C+C+A%3BFranz%2C+H+B%3BPepin%2C+R+O%3BTrainer%2C+Melissa+G%3BSchwenzer%2C+S+P%3BAtreya%2C+S+K%3BFreissinet%2C+Caroline%3BJones%2C+J+H%3BManning%2C+H%3BOwen%2C+T%3BPavlov%2C+A+A%3BWiens%2C+R+C%3BWong%2C+M+H%3BMahaffy%2C+Paul+R&rft.aulast=Conrad&rft.aufirst=Pamela&rft.date=2016-11-15&rft.volume=454&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2016.08.028 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 47 N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendix N1 - Last updated - 2016-12-16 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - achondrites; atmosphere; bromine; Curiosity Rover; enrichment; Gale Crater; halogens; in situ; isotopes; krypton; Mars; Mars Science Laboratory; Martian meteorites; mass spectra; measurement; meteorites; mixing; neutron capture; noble gases; planets; regolith; spallation; spectra; stable isotopes; stony meteorites; terrestrial planets; xenon DO - http://dx.doi.org/10.1016/j.epsl.2016.08.028 ER - TY - JOUR T1 - Hydrothermal transport, deposition, and fractionation of the REE; experimental data and thermodynamic calculations AN - 1819896251; 2016-081392 AB - For many years, our understanding of the behavior of the REE in hydrothermal systems was based on semi-empirical estimates involving extrapolation of thermodynamic data obtained at 25 degrees C (Haas et al., 1995; Wood, 1990a). Since then, a substantial body of experimental data has accumulated on the stability of aqueous complexes of the REE. These data have shown that some of the predictions of Haas et al. (1995) are accurate, but others may be in error by several orders of magnitude. However, application of the data in modeling hydrothermal transport and deposition of the REE has been severely hampered by the lack of data on the thermodynamic properties of even the most common REE minerals. The discrepancies between the predictions of Haas et al. (1995) and experimental determinations of the thermodynamic properties of aqueous REE species, together with the paucity of data on the stability of REE minerals, raise serious questions about the reliability of some models that have been proposed for the hydrothermal mobility of these critical metals. In this contribution, we review a body of high-temperature experimental data collected over the past 15 years on the stability of REE aqueous species and minerals. Using this new thermodynamic dataset, we re-evaluate the mechanisms responsible for hydrothermal transport and deposition of the REE. We also discuss the mechanisms that can result in REE fractionation during their hydrothermal transport and deposition. Our calculations suggest that in hydrothermal solutions, the main REE transporting ligands are chloride and sulfate, whereas fluoride, carbonate, and phosphate likely play an important role as depositional ligands. In addition to crystallographic fractionation, which is based on the differing affinity of mineral structures for the REE, our models suggest that the REE can be fractionated hydrothermally due to the differences in the stability of the LREE and HREE as aqueous chloride complexes. JF - Chemical Geology AU - Migdisov, A AU - Williams-Jones, A E AU - Brugger, Joel AU - Caporuscio, F A Y1 - 2016/11/07/ PY - 2016 DA - 2016 Nov 07 SP - 13 EP - 42 PB - Elsevier, Amsterdam VL - 439 SN - 0009-2541, 0009-2541 KW - mineral deposits, genesis KW - halides KW - fluorides KW - complexing KW - hydrolysis KW - aqueous solutions KW - metasomatism KW - NMR spectra KW - temperature KW - ligands KW - metallogeny KW - errors KW - transport KW - phase equilibria KW - hydrothermal alteration KW - spectra KW - rare earths KW - mineral assemblages KW - europium KW - thermodynamic properties KW - experimental studies KW - sulfates KW - prediction KW - hydrothermal conditions KW - molecular structure KW - models KW - deposition KW - metals KW - mathematical methods KW - metal ores KW - mobilization KW - accuracy KW - chemical fractionation KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819896251?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Hydrothermal+transport%2C+deposition%2C+and+fractionation+of+the+REE%3B+experimental+data+and+thermodynamic+calculations&rft.au=Migdisov%2C+A%3BWilliams-Jones%2C+A+E%3BBrugger%2C+Joel%3BCaporuscio%2C+F+A&rft.aulast=Migdisov&rft.aufirst=A&rft.date=2016-11-07&rft.volume=439&rft.issue=&rft.spage=13&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2016.06.005 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 158 N1 - Document feature - illus. incl. 5 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-09-16 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - accuracy; aqueous solutions; chemical fractionation; complexing; deposition; errors; europium; experimental studies; fluorides; halides; hydrolysis; hydrothermal alteration; hydrothermal conditions; ligands; mathematical methods; metal ores; metallogeny; metals; metasomatism; mineral assemblages; mineral deposits, genesis; mobilization; models; molecular structure; NMR spectra; phase equilibria; prediction; rare earths; spectra; sulfates; temperature; thermodynamic properties; transport DO - http://dx.doi.org/10.1016/j.chemgeo.2016.06.005 ER - TY - JOUR T1 - Mutational signatures associated with tobacco smoking in human cancer. AN - 1836730384; 27811275 AB - Tobacco smoking increases the risk of at least 17 classes of human cancer. We analyzed somatic mutations and DNA methylation in 5243 cancers of types for which tobacco smoking confers an elevated risk. Smoking is associated with increased mutation burdens of multiple distinct mutational signatures, which contribute to different extents in different cancers. One of these signatures, mainly found in cancers derived from tissues directly exposed to tobacco smoke, is attributable to misreplication of DNA damage caused by tobacco carcinogens. Others likely reflect indirect activation of DNA editing by APOBEC cytidine deaminases and of an endogenous clocklike mutational process. Smoking is associated with limited differences in methylation. The results are consistent with the proposition that smoking increases cancer risk by increasing the somatic mutation load, although direct evidence for this mechanism is lacking in some smoking-related cancer types. JF - Science (New York, N.Y.) AU - Alexandrov, Ludmil B AU - Ju, Young Seok AU - Haase, Kerstin AU - Van Loo, Peter AU - Martincorena, Iñigo AU - Nik-Zainal, Serena AU - Totoki, Yasushi AU - Fujimoto, Akihiro AU - Nakagawa, Hidewaki AU - Shibata, Tatsuhiro AU - Campbell, Peter J AU - Vineis, Paolo AU - Phillips, David H AU - Stratton, Michael R AD - Theoretical Biology and Biophysics (T-6), Los Alamos National Laboratory, Los Alamos, NM 87545, USA. lba@lanl.gov mrs@sanger.ac.uk. ; Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea. ; The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK. ; Cancer Genome Project, Wellcome Trust Sanger Institute, Hinxton CB10 1SA, Cambridgeshire, UK. ; Division of Cancer Genomics, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan. ; Laboratory for Genome Sequencing Analysis, RIKEN Center for Integrative Medical Sciences, Tokyo, Japan. ; Human Genetics Foundation, 10126 Torino, Italy. ; King's College London, MRC-PHE Centre for Environment and Health, Analytical and Environmental Sciences Division, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, UK. ; Cancer Genome Project, Wellcome Trust Sanger Institute, Hinxton CB10 1SA, Cambridgeshire, UK. lba@lanl.gov mrs@sanger.ac.uk. Y1 - 2016/11/04/ PY - 2016 DA - 2016 Nov 04 SP - 618 EP - 622 VL - 354 IS - 6312 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1836730384?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+%28New+York%2C+N.Y.%29&rft.atitle=Mutational+signatures+associated+with+tobacco+smoking+in+human+cancer.&rft.au=Alexandrov%2C+Ludmil+B%3BJu%2C+Young+Seok%3BHaase%2C+Kerstin%3BVan+Loo%2C+Peter%3BMartincorena%2C+I%C3%B1igo%3BNik-Zainal%2C+Serena%3BTotoki%2C+Yasushi%3BFujimoto%2C+Akihiro%3BNakagawa%2C+Hidewaki%3BShibata%2C+Tatsuhiro%3BCampbell%2C+Peter+J%3BVineis%2C+Paolo%3BPhillips%2C+David+H%3BStratton%2C+Michael+R&rft.aulast=Alexandrov&rft.aufirst=Ludmil&rft.date=2016-11-04&rft.volume=354&rft.issue=6312&rft.spage=618&rft.isbn=&rft.btitle=&rft.title=Science+%28New+York%2C+N.Y.%29&rft.issn=1095-9203&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-11-04 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 ER - TY - JOUR T1 - Fluidized-sediment pipes in Gale Crater, Mars, and possible Earth analogs AN - 1849307740; 2016-110971 AB - Since landing in Gale crater, the Mars Science Laboratory rover Curiosity has traversed fluvial, lacustrine, and eolian sedimentary rocks that were deposited within the crater approximately 3.6 to 3.2 b.y. ago. Here we describe structures interpreted to be pipes formed by vertical movement of fluidized sediment. Like many pipes on Earth, those in Gale crater are more resistant to erosion than the host rock; they form near other pipes, dikes, or deformed sediment; and some contain internal concentric or eccentric layering. These structures provide new evidence of the importance of subsurface aqueous processes in shaping the near-surface geology of Mars. JF - Geology (Boulder) AU - Rubin, David M AU - Fairen, Alberto G AU - Martinez-Frias, J AU - Frydenvang, Jens AU - Gasnault, Olivier AU - Gelfenbaum, G AU - Goetz, W AU - Grotzinger, John P AU - Le Mouelic, S AU - Mangold, N AU - Newsom, H AU - Oehler, D Z AU - Rapin, William AU - Schieber, Juergen AU - Wiens, R C Y1 - 2016/11/03/ PY - 2016 DA - 2016 Nov 03 SP - 7 EP - 10 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 1 SN - 0091-7613, 0091-7613 KW - United States KW - processes KW - Colorado Plateau KW - Mars KW - Gale Crater KW - flows KW - terrestrial planets KW - case studies KW - planets KW - cylindrical structures KW - Curiosity Rover KW - sediments KW - Mars Science Laboratory KW - terrestrial comparison KW - fluidization KW - sedimentary structures KW - 06A:Sedimentary petrology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849307740?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Cryosphere+%28Online%29&rft.atitle=Parameterization+of+basal+friction+near+grounding+lines+in+a+one-dimensional+ice+sheet+model&rft.au=Leguy%2C+G+R%3BAsay-Davis%2C+X+S%3BLipscomb%2C+W+H&rft.aulast=Leguy&rft.aufirst=G&rft.date=2014-01-01&rft.volume=8&rft.issue=4&rft.spage=1239&rft.isbn=&rft.btitle=&rft.title=The+Cryosphere+%28Online%29&rft.issn=1994-0424&rft_id=info:doi/10.5194%2Ftc-8-1239-2014 L2 - http://geology.gsapubs.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 36 N1 - PubXState - CO N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2017-01-19 N1 - CODEN - GLGYBA N1 - SubjectsTermNotLitGenreText - case studies; Colorado Plateau; Curiosity Rover; cylindrical structures; flows; fluidization; Gale Crater; Mars; Mars Science Laboratory; planets; processes; sedimentary structures; sediments; terrestrial comparison; terrestrial planets; United States DO - http://dx.doi.org/10.1130/G38339.1 ER - TY - JOUR T1 - Fluids during diagenesis and sulfate vein formation in sediments at Gale Crater, Mars AN - 1873348550; 2017-013483 AB - We model the fluids involved in the alteration processes recorded in the Sheepbed Member mudstones of Yellowknife Bay (YKB), Gale crater, Mars, as revealed by the Mars Science Laboratory Curiosity rover investigations. We compare the Gale crater waters with fluids modeled for shergottites, nakhlites, and the ancient meteorite ALH 84001, as well as rocks analyzed by the Mars Exploration rovers, and with terrestrial ground and surface waters. The aqueous solution present during sediment alteration associated with phyllosilicate formation at Gale was high in Na, K, and Si; had low Mg, Fe, and Al concentrations-relative to terrestrial groundwaters such as the Deccan Traps and other modeled Mars fluids; and had near neutral to alkaline pH. Ca and S species were present in the 10 (super -3) to 10 (super -2) concentration range. A fluid local to Gale crater strata produced the alteration products observed by Curiosity and subsequent evaporation of this groundwater-type fluid formed impure sulfate- and silica-rich deposits-veins or horizons. In a second, separate stage of alteration, partial dissolution of this sulfate-rich layer in Yellowknife Bay, or beyond, led to the pure sulfate veins observed in YKB. This scenario is analogous to similar processes identified at a terrestrial site in Triassic sediments with gypsum veins of the Mercia Mudstone Group in Watchet Bay, UK. Abstract Copyright (2016), The Authors Meteoritics & Planetary Science published by Wiley Periodicals, Inc. on behalf of The Meteoritical Society (MET) JF - Meteoritics & Planetary Science AU - Schwenzer, Susanne P AU - Bridges, J C AU - Wiens, R C AU - Conrad, P G AU - Kelley, S P AU - Leveille, R AU - Mangold, N AU - Martin-Torres, J AU - McAdam, A AU - Newsom, H AU - Zorzano, M P AU - Rapin, W AU - Spray, J AU - Treiman, A H AU - Westall, F AU - Fairen, A G AU - Meslin, P Y Y1 - 2016/11// PY - 2016 DA - November 2016 SP - 2175 EP - 2202 PB - Meteoritical Society, Fayetteville, AR VL - 51 IS - 11 SN - 1086-9379, 1086-9379 KW - Somerset England KW - England KW - Mars KW - fluid phase KW - Europe KW - aqueous solutions KW - Sheepbed Member KW - Great Britain KW - ground water KW - Gale Crater KW - sedimentary rocks KW - Triassic KW - silica KW - Curiosity Rover KW - sediments KW - Upper Triassic KW - Yellowknife Bay KW - Western Europe KW - mudstone KW - sulfates KW - veins KW - United Kingdom KW - Mesozoic KW - Watchet Bay KW - terrestrial planets KW - aqueous alteration KW - planets KW - evaporation KW - diagenesis KW - natural analogs KW - Mars Science Laboratory KW - terrestrial comparison KW - Mercia Mudstone KW - clastic rocks KW - 06A:Sedimentary petrology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873348550?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Meteoritics+%26+Planetary+Science&rft.atitle=Fluids+during+diagenesis+and+sulfate+vein+formation+in+sediments+at+Gale+Crater%2C+Mars&rft.au=Schwenzer%2C+Susanne+P%3BBridges%2C+J+C%3BWiens%2C+R+C%3BConrad%2C+P+G%3BKelley%2C+S+P%3BLeveille%2C+R%3BMangold%2C+N%3BMartin-Torres%2C+J%3BMcAdam%2C+A%3BNewsom%2C+H%3BZorzano%2C+M+P%3BRapin%2C+W%3BSpray%2C+J%3BTreiman%2C+A+H%3BWestall%2C+F%3BFairen%2C+A+G%3BMeslin%2C+P+Y&rft.aulast=Schwenzer&rft.aufirst=Susanne&rft.date=2016-11-01&rft.volume=51&rft.issue=11&rft.spage=2175&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12668 L2 - http://cavern.uark.edu/~meteor/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 143 N1 - PubXState - AR N1 - Document feature - illus. incl. 3 tables, geol. sketch map N1 - Last updated - 2017-03-02 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aqueous alteration; aqueous solutions; clastic rocks; Curiosity Rover; diagenesis; England; Europe; evaporation; fluid phase; Gale Crater; Great Britain; ground water; Mars; Mars Science Laboratory; Mercia Mudstone; Mesozoic; mudstone; natural analogs; planets; sedimentary rocks; sediments; Sheepbed Member; silica; Somerset England; sulfates; terrestrial comparison; terrestrial planets; Triassic; United Kingdom; Upper Triassic; veins; Watchet Bay; Western Europe; Yellowknife Bay DO - http://dx.doi.org/10.1111/maps.12668 ER - TY - JOUR T1 - Structural transitions and hysteresis in clump- and stripe-forming systems under dynamic compression AN - 1850780539; PQ0003912363 AB - Using numerical simulations, we study the dynamical evolution of particles interacting via competing long-range repulsion and short-range attraction in two dimensions. The particles are compressed using a time-dependent quasi-one dimensional trough potential that controls the local density, causing the system to undergo a series of structural phase transitions from a low density clump lattice to stripes, voids, and a high density uniform state. The compression proceeds via slow elastic motion that is interrupted with avalanche-like bursts of activity as the system collapses to progressively higher densities via plastic rearrangements. The plastic events vary in magnitude from small rearrangements of particles, including the formation of quadrupole-like defects, to large-scale vorticity and structural phase transitions. In the dense uniform phase, the system compresses through row reduction transitions mediated by a disorder-order process. We characterize the rearrangement events by measuring changes in the potential energy, the fraction of sixfold coordinated particles, the local density, and the velocity distribution. At high confinements, we find power law scaling of the velocity distribution during row reduction transitions. We observe hysteresis under a reversal of the compression when relatively few plastic rearrangements occur. The decompressing system exhibits distinct phase morphologies, and the phase transitions occur at lower compression forces as the system expands compared to when it is compressed. JF - Soft Matter AU - McDermott, Danielle AU - Olson Reichhardt, Cynthia J AU - Reichhardt, Charles AD - Theoretical Division; Los Alamos National Laboratory; Los Alamos; New Mexico 87545; USA; +1 505 606 0917; +1 505 665 1134 Y1 - 2016/11// PY - 2016 DA - November 2016 SP - 9549 EP - 9560 PB - Royal Society of Chemistry VL - 12 IS - 47 SN - 1744-683X, 1744-683X KW - Biotechnology and Bioengineering Abstracts KW - Mathematical models KW - Energy KW - Phase transition KW - Hysteresis KW - Plastics KW - Scaling KW - Evolution KW - Compression KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1850780539?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Soft+Matter&rft.atitle=Structural+transitions+and+hysteresis+in+clump-+and+stripe-forming+systems+under+dynamic+compression&rft.au=McDermott%2C+Danielle%3BOlson+Reichhardt%2C+Cynthia+J%3BReichhardt%2C+Charles&rft.aulast=McDermott&rft.aufirst=Danielle&rft.date=2016-11-01&rft.volume=12&rft.issue=47&rft.spage=9549&rft.isbn=&rft.btitle=&rft.title=Soft+Matter&rft.issn=1744683X&rft_id=info:doi/10.1039%2Fc6sm01939k LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Number of references - 42 N1 - Last updated - 2016-12-21 N1 - SubjectsTermNotLitGenreText - Mathematical models; Energy; Hysteresis; Phase transition; Plastics; Scaling; Evolution; Compression DO - http://dx.doi.org/10.1039/c6sm01939k ER - TY - JOUR T1 - The role of Atlantic Multi-decadal Oscillation in the global mean temperature variability AN - 1837323555; PQ0003750168 AB - The global mean 1900-2015 warming simulated by 42 Coupled Models Inter-comparison Project, phase 5 (CMIP5) climate models varies between 0.58 and 1.70 degree C. The observed warming according to the NASA GISS temperature analysis is 0.95 degree C with a 1200 km smoothing radius, or 0.86 degree C with a 250 km smoothing radius. The projection of the future 2015-2100 global warming under a moderate increase of anthropogenic radiative forcing (RCP4.5 scenario) by individual models is between 0.7 and 2.3 degree C. The CMIP5 climate models agree that the future climate will be warmer; however, there is little consensus as to how large the warming will be (reflected by an uncertainty of over a factor of three). A parsimonious statistical regression model with just three explanatory variables [anthropogenic radiative forcing due to greenhouse gases and aerosols (GHGA), solar variability, and the Atlantic Multi-decadal Oscillation (AMO) index] accounts for over 95 % of the observed 1900-2015 temperature variance. This statistical regression model reproduces very accurately the past warming (0.96 degree C compared to the observed 0.95 degree C) and projects the future 2015-2100 warming to be around 0.95 degree C (with the IPCC 2013 suggested RCP4.5 radiative forcing and an assumed cyclic AMO behavior). The AMO contribution to the 1970-2005 warming was between 0.13 and 0.20 degree C (depending on which AMO index is used) compared to the GHGA contribution of 0.49-0.58 degree C. During the twenty-first century AMO cycle the AMO contribution is projected to remain the same (0.13-0.20 degree C), while the GHGA contribution is expected to decrease to 0.21-0.25 degree C due to the levelling off of the GHGA radiative forcing that is assumed according to the RCP4.5 scenario. Thus the anthropogenic contribution and natural variability are expected to contribute about equally to the anticipated global warming during the second half of the twenty-first century for the RCP4.5 trajectory. JF - Climate Dynamics AU - Chylek, Petr AU - Klett, James D AU - Dubey, Manvendra K AU - Hengartner, Nicolas AD - Los Alamos National Laboratory, Earth and Environmental Sciences, Los Alamos, NM, USA, chylek@lanl.gov Y1 - 2016/11// PY - 2016 DA - November 2016 SP - 3271 EP - 3279 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 47 IS - 9-10 SN - 0930-7575, 0930-7575 KW - Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - Solar variability KW - Variability KW - Climate change KW - Anthropogenic factors KW - Levelling KW - Temperature analysis KW - Radiative forcing KW - Ocean-atmosphere system KW - Modelling KW - Marine KW - Mean temperatures KW - Aerosols KW - Climate models KW - Climates KW - Regression models KW - Climate KW - Temperature KW - Natural variability KW - Greenhouse effect KW - Intergovernmental Panel on Climate Change KW - Global Warming KW - A, Atlantic KW - Global warming KW - Greenhouse gases KW - Future climates KW - SW 0810:General KW - M2 551.588:Environmental Influences (551.588) KW - Q2 09244:Air-sea coupling KW - O 4060:Pollution - Environment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1837323555?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+Dynamics&rft.atitle=The+role+of+Atlantic+Multi-decadal+Oscillation+in+the+global+mean+temperature+variability&rft.au=Chylek%2C+Petr%3BKlett%2C+James+D%3BDubey%2C+Manvendra+K%3BHengartner%2C+Nicolas&rft.aulast=Chylek&rft.aufirst=Petr&rft.date=2016-11-01&rft.volume=47&rft.issue=9-10&rft.spage=3271&rft.isbn=&rft.btitle=&rft.title=Climate+Dynamics&rft.issn=09307575&rft_id=info:doi/10.1007%2Fs00382-016-3025-7 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-11-01 N1 - Number of references - 46 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Aerosols; Climate change; Climate; Ocean-atmosphere system; Anthropogenic factors; Levelling; Greenhouse effect; Modelling; Solar variability; Mean temperatures; Radiative forcing; Climate models; Regression models; Natural variability; Global warming; Intergovernmental Panel on Climate Change; Greenhouse gases; Temperature analysis; Future climates; Variability; Climates; Temperature; Global Warming; A, Atlantic; Marine DO - http://dx.doi.org/10.1007/s00382-016-3025-7 ER - TY - JOUR T1 - Uranium isotope composition of waters from South Texas uranium ore deposits AN - 1812216591; 2016-069236 AB - Redox conditions and associated changes in mobility of uranium (U) are tightly linked to a multitude of challenges connected with U mining in sandstone-hosted deposits and new methods that directly measure reduction or oxidation of U can inform on these questions. A novel proxy for understanding U redox chemistry has recently emerged, the volume dependent isotopic fractionation of uranium-238 ( (super 238) U) from uranium-235 ( (super 235) U). Novel measurements of (super 238) U/ (super 235) U isotopic ratio are combined with measurements of the more commonly utilized uranium-234/uranium-238 activity [( (super 234) U/ (super 238) U)] ratio, as both isotopic ratios can be measured simultaneously. However, application of both U isotopic ratios in the contexts of exploration and environmental remediation of U ores requires characterization of these isotopic ratios across a variety of redox settings. Here, (super 238) U/ (super 235) U and ( (super 234) U/ (super 238) U) ratios are examined from eight transects in two U ore bodies (the Rosita and Kingsville Dome deposits) in South Texas; these sites are classic roll front deposits and exhibit a wide variety of both natural and altered redox conditions. Across all transects it is observed that ( (super 234) U/ (super 238) U) ratios decrease systematically towards the ore body from both the oxidizing and reducing sides, irrespective of whether the site has been mined or not. This pattern reflects geologically recent and significant U leaching and mobility and is characteristic of active roll fronts. Overall delta (super 238) U values in these transects decrease systematically towards the reducing zone. A simple Rayleigh fractionation model, where U ore is deposited from an increasingly isotopically depleted reservoir of dissolved U best explains the overall trend; very negative delta (super 238) U values likely reflect multiple cycles of U deposition and dissolution. The South Texas data set indicates that both ( (super 234) U/ (super 238) U) ratios and delta (super 238) U values can be variable at an individual mine site. However, overall low ( (super 234) U/ (super 238) U) ratios and negative delta (super 238) U values are characteristic of active roll front deposits. The comprehensive U isotopic composition of both ores and well waters represents a powerful new tool in prospecting of sandstone-hosted U ore and in environmental remediation following extraction of U ore. JF - Chemical Geology AU - Placzek, Christa J AU - Heikoop, Jeffrey M AU - House, Brian AU - Linhoff, Benjamin S AU - Pelizza, Mark Y1 - 2016/10/25/ PY - 2016 DA - 2016 Oct 25 SP - 44 EP - 55 PB - Elsevier, Amsterdam VL - 437 SN - 0009-2541, 0009-2541 KW - United States KW - mineral exploration KW - mineral deposits, genesis KW - isotopes KW - roll-type deposits KW - mass spectra KW - southern Texas KW - remediation KW - ground water KW - Cenozoic KW - Rosita Deposit KW - radioactive isotopes KW - metallogeny KW - Kingsville Dome Deposit KW - South Texas uranium district KW - spectra KW - chemical composition KW - water pollution KW - Eh KW - pollutants KW - isotope ratios KW - pollution KW - Texas KW - solubility KW - Goliad Sand KW - ICP mass spectra KW - uranium ores KW - Tertiary KW - Brooks County Texas KW - sandstone-type deposits KW - metals KW - metal ores KW - uranium KW - mobilization KW - U-238/U-235 KW - water wells KW - actinides KW - 27A:Economic geology, geology of ore deposits KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812216591?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Uranium+isotope+composition+of+waters+from+South+Texas+uranium+ore+deposits&rft.au=Placzek%2C+Christa+J%3BHeikoop%2C+Jeffrey+M%3BHouse%2C+Brian%3BLinhoff%2C+Benjamin+S%3BPelizza%2C+Mark&rft.aulast=Placzek&rft.aufirst=Christa&rft.date=2016-10-25&rft.volume=437&rft.issue=&rft.spage=44&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2016.05.008 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 49 N1 - Document feature - illus. incl. 1 table, geol. sketch map N1 - Last updated - 2016-11-17 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - actinides; Brooks County Texas; Cenozoic; chemical composition; Eh; Goliad Sand; ground water; ICP mass spectra; isotope ratios; isotopes; Kingsville Dome Deposit; mass spectra; metal ores; metallogeny; metals; mineral deposits, genesis; mineral exploration; mobilization; pollutants; pollution; radioactive isotopes; remediation; roll-type deposits; Rosita Deposit; sandstone-type deposits; solubility; South Texas uranium district; southern Texas; spectra; Tertiary; Texas; U-238/U-235; United States; uranium; uranium ores; water pollution; water wells DO - http://dx.doi.org/10.1016/j.chemgeo.2016.05.008 ER - TY - JOUR T1 - Association of Distinct Mutational Signatures With Correlates of Increased Immune Activity in Pancreatic Ductal Adenocarcinoma. AN - 1835513629; 27768182 AB - ImportanceOutcomes for patients with pancreatic ductal adenocarcinoma (PDAC) remain poor. Advances in next-generation sequencing provide a route to therapeutic approaches, and integrating DNA and RNA analysis with clinicopathologic data may be a crucial step toward personalized treatment strategies for this disease.ObjectiveTo classify PDAC according to distinct mutational processes, and explore their clinical significance.Design, Setting, and ParticipantsWe performed a retrospective cohort study of resected PDAC, using cases collected between 2008 and 2015 as part of the International Cancer Genome Consortium. The discovery cohort comprised 160 PDAC cases from 154 patients (148 primary; 12 metastases) that underwent tumor enrichment prior to whole-genome and RNA sequencing. The replication cohort comprised 95 primary PDAC cases that underwent whole-genome sequencing and expression microarray on bulk biospecimens.Main Outcomes and MeasuresSomatic mutations accumulate from sequence-specific processes creating signatures detectable by DNA sequencing. Using nonnegative matrix factorization, we measured the contribution of each signature to carcinogenesis, and used hierarchical clustering to subtype each cohort. We examined expression of antitumor immunity genes across subtypes to uncover biomarkers predictive of response to systemic therapies.ResultsThe discovery cohort was 53% male (n = 79) and had a median age of 67 (interquartile range, 58-74) years. The replication cohort was 50% male (n = 48) and had a median age of 68 (interquartile range, 60-75) years. Five predominant mutational subtypes were identified that clustered PDAC into 4 major subtypes: age related, double-strand break repair, mismatch repair, and 1 with unknown etiology (signature 8). These were replicated and validated. Signatures were faithfully propagated from primaries to matched metastases, implying their stability during carcinogenesis. Twelve of 27 (45%) double-strand break repair cases lacked germline or somatic events in canonical homologous recombination genes-BRCA1, BRCA2, or PALB2. Double-strand break repair and mismatch repair subtypes were associated with increased expression of antitumor immunity, including activation of CD8-positive T lymphocytes (GZMA and PRF1) and overexpression of regulatory molecules (cytotoxic T-lymphocyte antigen 4, programmed cell death 1, and indolamine 2,3-dioxygenase 1), corresponding to higher frequency of somatic mutations and tumor-specific neoantigens.Conclusions and RelevanceSignature-based subtyping may guide personalized therapy of PDAC in the context of biomarker-driven prospective trials. JF - JAMA oncology AU - Connor, Ashton A AU - Denroche, Robert E AU - Jang, Gun Ho AU - Timms, Lee AU - Kalimuthu, Sangeetha N AU - Selander, Iris AU - McPherson, Treasa AU - Wilson, Gavin W AU - Chan-Seng-Yue, Michelle A AU - Borozan, Ivan AU - Ferretti, Vincent AU - Grant, Robert C AU - Lungu, Ilinca M AU - Costello, Eithne AU - Greenhalf, William AU - Palmer, Daniel AU - Ghaneh, Paula AU - Neoptolemos, John P AU - Buchler, Markus AU - Petersen, Gloria AU - Thayer, Sarah AU - Hollingsworth, Michael A AU - Sherker, Alana AU - Durocher, Daniel AU - Dhani, Neesha AU - Hedley, David AU - Serra, Stefano AU - Pollett, Aaron AU - Roehrl, Michael H A AU - Bavi, Prashant AU - Bartlett, John M S AU - Cleary, Sean AU - Wilson, Julie M AU - Alexandrov, Ludmil B AU - Moore, Malcolm AU - Wouters, Bradly G AU - McPherson, John D AU - Notta, Faiyaz AU - Stein, Lincoln D AU - Gallinger, Steven AD - PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada2Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada3Hepatobiliary/Pancreatic Surgical Oncology Program, University Health Network, Toronto, Ontario, Canada. ; PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada4Informatics and Bio-computing Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada. ; PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada4Informatics and Bio-computing Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada5Department of Statistical Science, University of Toronto, Toronto, Ontario, Canada. ; PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada6Genome Technologies Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada. ; PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada. ; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada. ; Informatics and Bio-computing Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada. ; PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada2Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada. ; Transformative Pathology, Ontario Institute for Cancer Research, Toronto, Ontario, Canada. ; University of Liverpool, Liverpool, England. ; Heidelberg University Hospital, Heidelberg, Germany. ; Mayo Clinic, Rochester, Minnesota. ; Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts. ; University of Nebraska Medical Centre, Omaha, Nebraska. ; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada13Molecular Genetics Department, University of Toronto, Toronto, Ontario, Canada. ; Division of Medical Oncology, Princess Margaret Cancer Centre, Toronto, Ontario, Canada. ; Hepatobiliary/Pancreatic Surgical Oncology Program, University Health Network, Toronto, Ontario, Canada. ; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada15Department of Laboratory Medicine and Pathobiology, University of Toronto, Ontario, Canada. ; PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada15Department of Laboratory Medicine and Pathobiology, University of Toronto, Ontario, Canada16Department of Pathology, University Health Network, Toronto, Ontario, Canada17Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada18BioSpecimen Sciences Program, University Health Network, Toronto, Ontario, Canada. ; PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada3Hepatobiliary/Pancreatic Surgical Oncology Program, University Health Network, Toronto, Ontario, Canada. ; Theoretical Biology and Biophysics (T-6), Los Alamos National Laboratory, Los Alamos, New Mexico20Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico. ; Department of Pathology, University Health Network, Toronto, Ontario, Canada. ; Genome Technologies Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada17Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada. ; Informatics and Bio-computing Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada13Molecular Genetics Department, University of Toronto, Toronto, Ontario, Canada. Y1 - 2016/10/20/ PY - 2016 DA - 2016 Oct 20 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1835513629?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=JAMA+oncology&rft.atitle=Association+of+Distinct+Mutational+Signatures+With+Correlates+of+Increased+Immune+Activity+in+Pancreatic+Ductal+Adenocarcinoma.&rft.au=Connor%2C+Ashton+A%3BDenroche%2C+Robert+E%3BJang%2C+Gun+Ho%3BTimms%2C+Lee%3BKalimuthu%2C+Sangeetha+N%3BSelander%2C+Iris%3BMcPherson%2C+Treasa%3BWilson%2C+Gavin+W%3BChan-Seng-Yue%2C+Michelle+A%3BBorozan%2C+Ivan%3BFerretti%2C+Vincent%3BGrant%2C+Robert+C%3BLungu%2C+Ilinca+M%3BCostello%2C+Eithne%3BGreenhalf%2C+William%3BPalmer%2C+Daniel%3BGhaneh%2C+Paula%3BNeoptolemos%2C+John+P%3BBuchler%2C+Markus%3BPetersen%2C+Gloria%3BThayer%2C+Sarah%3BHollingsworth%2C+Michael+A%3BSherker%2C+Alana%3BDurocher%2C+Daniel%3BDhani%2C+Neesha%3BHedley%2C+David%3BSerra%2C+Stefano%3BPollett%2C+Aaron%3BRoehrl%2C+Michael+H+A%3BBavi%2C+Prashant%3BBartlett%2C+John+M+S%3BCleary%2C+Sean%3BWilson%2C+Julie+M%3BAlexandrov%2C+Ludmil+B%3BMoore%2C+Malcolm%3BWouters%2C+Bradly+G%3BMcPherson%2C+John+D%3BNotta%2C+Faiyaz%3BStein%2C+Lincoln+D%3BGallinger%2C+Steven&rft.aulast=Connor&rft.aufirst=Ashton&rft.date=2016-10-20&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=JAMA+oncology&rft.issn=2374-2445&rft_id=info:doi/10.1001%2Fjamaoncol.2016.3916 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-10-21 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1001/jamaoncol.2016.3916 ER - TY - JOUR T1 - A renewed model of pancreatic cancer evolution based on genomic rearrangement patterns. AN - 1835416179; 27732578 AB - Pancreatic cancer, a highly aggressive tumour type with uniformly poor prognosis, exemplifies the classically held view of stepwise cancer development. The current model of tumorigenesis, based on analyses of precursor lesions, termed pancreatic intraepithelial neoplasm (PanINs) lesions, makes two predictions: first, that pancreatic cancer develops through a particular sequence of genetic alterations (KRAS, followed by CDKN2A, then TP53 and SMAD4); and second, that the evolutionary trajectory of pancreatic cancer progression is gradual because each alteration is acquired independently. A shortcoming of this model is that clonally expanded precursor lesions do not always belong to the tumour lineage, indicating that the evolutionary trajectory of the tumour lineage and precursor lesions can be divergent. This prevailing model of tumorigenesis has contributed to the clinical notion that pancreatic cancer evolves slowly and presents at a late stage. However, the propensity for this disease to rapidly metastasize and the inability to improve patient outcomes, despite efforts aimed at early detection, suggest that pancreatic cancer progression is not gradual. Here, using newly developed informatics tools, we tracked changes in DNA copy number and their associated rearrangements in tumour-enriched genomes and found that pancreatic cancer tumorigenesis is neither gradual nor follows the accepted mutation order. Two-thirds of tumours harbour complex rearrangement patterns associated with mitotic errors, consistent with punctuated equilibrium as the principal evolutionary trajectory. In a subset of cases, the consequence of such errors is the simultaneous, rather than sequential, knockout of canonical preneoplastic genetic drivers that are likely to set-off invasive cancer growth. These findings challenge the current progression model of pancreatic cancer and provide insights into the mutational processes that give rise to these aggressive tumours. JF - Nature AU - Notta, Faiyaz AU - Chan-Seng-Yue, Michelle AU - Lemire, Mathieu AU - Li, Yilong AU - Wilson, Gavin W AU - Connor, Ashton A AU - Denroche, Robert E AU - Liang, Sheng-Ben AU - Brown, Andrew M K AU - Kim, Jaeseung C AU - Wang, Tao AU - Simpson, Jared T AU - Beck, Timothy AU - Borgida, Ayelet AU - Buchner, Nicholas AU - Chadwick, Dianne AU - Hafezi-Bakhtiari, Sara AU - Dick, John E AU - Heisler, Lawrence AU - Hollingsworth, Michael A AU - Ibrahimov, Emin AU - Jang, Gun Ho AU - Johns, Jeremy AU - Jorgensen, Lars G T AU - Law, Calvin AU - Ludkovski, Olga AU - Lungu, Ilinca AU - Ng, Karen AU - Pasternack, Danielle AU - Petersen, Gloria M AU - Shlush, Liran I AU - Timms, Lee AU - Tsao, Ming-Sound AU - Wilson, Julie M AU - Yung, Christina K AU - Zogopoulos, George AU - Bartlett, John M S AU - Alexandrov, Ludmil B AU - Real, Francisco X AU - Cleary, Sean P AU - Roehrl, Michael H AU - McPherson, John D AU - Stein, Lincoln D AU - Hudson, Thomas J AU - Campbell, Peter J AU - Gallinger, Steven AD - Ontario Institute for Cancer Research, Toronto, Ontario M5G 0A3, Canada. ; Cancer Genome Project, Wellcome Trust Sanger Institute, Hinxton CB10 1SA, UK. ; UHN Program in BioSpecimen Sciences, Department of Pathology, University Health Network, Toronto, Ontario M5G 2C4, Canada. ; Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 1L7, Canada. ; Eppley Institute for Research in Cancer, Nebraska Medical Center, Omaha, Nebraska 68198, USA. ; Division of Surgical Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, Toronto, Ontario M4N 3M5, Canada. ; Princess Margaret Cancer Centre, University Health Network (UHN), Toronto, Ontario M5G 2M9, Canada. ; Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota 55905, USA. ; Research Institute of the McGill University Health Centre, Montreal, Québec, Canada, H3H 2L9. ; Theoretical Biology and Biophysics (T-6) and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico, USA, 87545. ; Epithelial Carcinogenesis Group, Spanish National Cancer Research Centre (CNIO), Madrid 28029, Spain. ; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario M5G 1X5, Canada. Y1 - 2016/10/20/ PY - 2016 DA - 2016 Oct 20 SP - 378 EP - 382 VL - 538 IS - 7625 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1835416179?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature&rft.atitle=A+renewed+model+of+pancreatic+cancer+evolution+based+on+genomic+rearrangement+patterns.&rft.au=Notta%2C+Faiyaz%3BChan-Seng-Yue%2C+Michelle%3BLemire%2C+Mathieu%3BLi%2C+Yilong%3BWilson%2C+Gavin+W%3BConnor%2C+Ashton+A%3BDenroche%2C+Robert+E%3BLiang%2C+Sheng-Ben%3BBrown%2C+Andrew+M+K%3BKim%2C+Jaeseung+C%3BWang%2C+Tao%3BSimpson%2C+Jared+T%3BBeck%2C+Timothy%3BBorgida%2C+Ayelet%3BBuchner%2C+Nicholas%3BChadwick%2C+Dianne%3BHafezi-Bakhtiari%2C+Sara%3BDick%2C+John+E%3BHeisler%2C+Lawrence%3BHollingsworth%2C+Michael+A%3BIbrahimov%2C+Emin%3BJang%2C+Gun+Ho%3BJohns%2C+Jeremy%3BJorgensen%2C+Lars+G+T%3BLaw%2C+Calvin%3BLudkovski%2C+Olga%3BLungu%2C+Ilinca%3BNg%2C+Karen%3BPasternack%2C+Danielle%3BPetersen%2C+Gloria+M%3BShlush%2C+Liran+I%3BTimms%2C+Lee%3BTsao%2C+Ming-Sound%3BWilson%2C+Julie+M%3BYung%2C+Christina+K%3BZogopoulos%2C+George%3BBartlett%2C+John+M+S%3BAlexandrov%2C+Ludmil+B%3BReal%2C+Francisco+X%3BCleary%2C+Sean+P%3BRoehrl%2C+Michael+H%3BMcPherson%2C+John+D%3BStein%2C+Lincoln+D%3BHudson%2C+Thomas+J%3BCampbell%2C+Peter+J%3BGallinger%2C+Steven&rft.aulast=Notta&rft.aufirst=Faiyaz&rft.date=2016-10-20&rft.volume=538&rft.issue=7625&rft.spage=378&rft.isbn=&rft.btitle=&rft.title=Nature&rft.issn=1476-4687&rft_id=info:doi/10.1038%2Fnature19823 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-10-12 N1 - Date revised - 2017-02-28 N1 - Last updated - 2017-02-28 DO - http://dx.doi.org/10.1038/nature19823 ER - TY - JOUR T1 - Low stress drop earthquakes in the rupture zone of the 1992 Nicaragua tsunami earthquake AN - 1869031853; 2017-011357 AB - Tsunami earthquakes, events that generate larger than expected tsunami and are deficient in high-frequency seismic radiation, are rare but hazardous to coastal populations. One model for these events is shallow rupture through low-strength materials. We calculate seismic moment, corner frequency, and stress drop for 216 earthquakes (2.1 < M (sub w) < 4.7, November 2005 to June 2006) within and external to the 1992 Nicaragua tsunami earthquake rupture zone to test the hypothesis that differences in fault zone properties defined the limits of the 1992 tsunami rupture zone and continue to produce spatial variations in earthquake source properties. Mean stress drop of events within the rupture area is 1.2 MPa, and 5.5 MPa for events just outside of the rupture zone, with similar magnitude earthquakes in each group. Our results demonstrate different source parameter characteristics for microseismicity in the region of a past tsunami earthquake. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Bilek, Susan L AU - Rotman, Holly M M AU - Phillips, W Scott Y1 - 2016/10/16/ PY - 2016 DA - 2016 Oct 16 SP - 10 EP - 10,188 PB - American Geophysical Union, Washington, DC VL - 43 IS - 19 SN - 0094-8276, 0094-8276 KW - tsunamis KW - stress drops KW - body waves KW - seismology KW - seismic moment KW - Costa Rica KW - northern Costa Rica KW - stress KW - magnitude KW - elastic waves KW - frequency KW - spatial variations KW - rupture KW - seismicity KW - coastal environment KW - seismic waves KW - Nicaragua earthquake 1992 KW - earthquakes KW - Central America KW - S-waves KW - faults KW - fault zones KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869031853?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=Between+the+wars+%281920-1940%29&rft.au=Kues%2C+Barry+S%3BLewis%2C+Claudia+J%3BFassett%2C+James+E%3BWilliamson%2C+Thomas+E%3BPhillips%2C+Fred+M&rft.aulast=Kues&rft.aufirst=Barry&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=121&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 65 N1 - PubXState - DC N1 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2017-02-17 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - body waves; Central America; coastal environment; Costa Rica; earthquakes; elastic waves; fault zones; faults; frequency; magnitude; Nicaragua earthquake 1992; northern Costa Rica; rupture; S-waves; seismic moment; seismic waves; seismicity; seismology; spatial variations; stress; stress drops; tsunamis DO - http://dx.doi.org/10.1002/2016GL070409 ER - TY - JOUR T1 - Hydration state of calcium sulfates in Gale Crater, Mars; identification of bassanite veins AN - 1832727500; 2016-092729 AB - In-situ analyses reveal the presence of hydrogen within calcium sulfate veins crosscutting the sediments found in Gale crater. Laboratory experiments were performed to calibrate the hydrogen signal measured by laser induced breakdown spectroscopy (LIBS) in a range applicable to martian data. The analyses indicate that all veins targeted so far at Gale consist predominantly of bassanite which most likely formed by dehydration of gypsum. This scenario suggests that the percolating water produced gypsum, possibly by hydration of anhydrite in aqueous solution, and remained at temperatures below approximately 60 degrees C at that time. Desiccating conditions followed, consistent with a hyperarid climate and favored by burial or impacts. Additionally, anhydrite with lesser bassanite has been found by XRD in samples of sediments hosting the veins. Our result suggests bassanite is likely found in the veins and anhydrite may be more common as a fine-grained component within the sediments. JF - Earth and Planetary Science Letters AU - Rapin, William AU - Meslin, P Y AU - Maurice, S AU - Vaniman, D AU - Nachon, M AU - Mangold, N AU - Schroeder, S AU - Gasnault, O AU - Forni, O AU - Wiens, Roger C AU - Martinez, G M AU - Cousin, A AU - Sautter, Violaine AU - Lasue, J AU - Rampe, E B AU - Archer, D Y1 - 2016/10/15/ PY - 2016 DA - 2016 Oct 15 SP - 197 EP - 205 PB - Elsevier, Amsterdam VL - 452 SN - 0012-821X, 0012-821X KW - calcium sulfate KW - anhydrite KW - Mars KW - Hesperian KW - aqueous solutions KW - paleoclimatology KW - bassanite KW - burial KW - Gale Crater KW - emission spectra KW - laboratory studies KW - gypsum KW - LIBS spectra KW - percolation KW - spectra KW - water KW - hydrology KW - ChemCam instrument KW - experimental studies KW - sulfates KW - impacts KW - veins KW - depth KW - desiccation KW - terrestrial planets KW - planets KW - identification KW - hydrogen KW - dehydration KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832727500?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+and+Planetary+Science+Letters&rft.atitle=Hydration+state+of+calcium+sulfates+in+Gale+Crater%2C+Mars%3B+identification+of+bassanite+veins&rft.au=Rapin%2C+William%3BMeslin%2C+P+Y%3BMaurice%2C+S%3BVaniman%2C+D%3BNachon%2C+M%3BMangold%2C+N%3BSchroeder%2C+S%3BGasnault%2C+O%3BForni%2C+O%3BWiens%2C+Roger+C%3BMartinez%2C+G+M%3BCousin%2C+A%3BSautter%2C+Violaine%3BLasue%2C+J%3BRampe%2C+E+B%3BArcher%2C+D&rft.aulast=Rapin&rft.aufirst=William&rft.date=2016-10-15&rft.volume=12&rft.issue=&rft.spage=75&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 53 N1 - Document feature - illus. N1 - SuppNotes - Includes appendix N1 - Last updated - 2016-10-27 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - anhydrite; aqueous solutions; bassanite; burial; calcium sulfate; ChemCam instrument; dehydration; depth; desiccation; emission spectra; experimental studies; Gale Crater; gypsum; Hesperian; hydrogen; hydrology; identification; impacts; laboratory studies; LIBS spectra; Mars; paleoclimatology; percolation; planets; spectra; sulfates; terrestrial planets; veins; water DO - http://dx.doi.org/10.1016/j.epsl.2016.07.045 ER - TY - JOUR T1 - Se Isotopes as Groundwater Redox Indicators: Detecting Natural Attenuation of Se at an in Situ Recovery U Mine. AN - 1835356638; 27547844 AB - One of the major ecological concerns associated with the in situ recovery (ISR) of uranium (U) is the environmental release of soluble, toxic selenium (Se) oxyanions generated by mining. Post-mining natural attenuation by the residual reductants in the ore body and reduced down-gradient sediments should mitigate the risk of Se contamination in groundwater. In this work, we investigate the Se concentrations and Se isotope systematics of groundwater and of U ore bearing sediments from an ISR site at Rosita, TX, USA. Our results show that selenate (Se(VI)) is the dominant Se species in Rosita groundwater, and while several up-gradient wells have elevated Se(VI), the majority of the ore zone and down-gradient wells have little or no Se oxyanions. In addition, the δ82SeVI of Rosita groundwater is generally elevated relative to the U ore up to +6.14‰, with the most enriched values observed in the ore-zone wells. Increasing δ82Se with decreasing Se(VI) conforms to a Rayleigh type distillation model with an ε of -2.25‰ ± 0.61‰, suggesting natural Se(VI) reduction occurring along the hydraulic gradient at the Rosita ISR site. Furthermore, our results show that Se isotopes are excellent sensors for detecting and monitoring post-mining natural attenuation of Se oxyanions at ISR sites. JF - Environmental science & technology AU - Basu, Anirban AU - Schilling, Kathrin AU - Brown, Shaun T AU - Johnson, Thomas M AU - Christensen, John N AU - Hartmann, Matt AU - Reimus, Paul W AU - Heikoop, Jeffrey M AU - Woldegabriel, Giday AU - DePaolo, Donald J AD - Department of Earth and Planetary Science, University of California , 307 McCone Hall, Berkeley, California 94720, United States. ; Department of Environmental Science, Policy and Management, University of California , 130 Mulford Hall, Berkeley, California 94720, United States. ; Department of Geology, University of Illinois at Urbana-Champaign , 605 East Springfield Avenue, Champaign, Illinois 61820, United States. ; Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States. ; Uranium Resources, Inc. , 6950 South Potomac Street, Suite 300, Centennial, Colorado 80112, United States. ; Earth and Environmental Sciences Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States. Y1 - 2016/10/04/ PY - 2016 DA - 2016 Oct 04 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1835356638?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+science+%26+technology&rft.atitle=Se+Isotopes+as+Groundwater+Redox+Indicators%3A+Detecting+Natural+Attenuation+of+Se+at+an+in+Situ+Recovery+U+Mine.&rft.au=Basu%2C+Anirban%3BSchilling%2C+Kathrin%3BBrown%2C+Shaun+T%3BJohnson%2C+Thomas+M%3BChristensen%2C+John+N%3BHartmann%2C+Matt%3BReimus%2C+Paul+W%3BHeikoop%2C+Jeffrey+M%3BWoldegabriel%2C+Giday%3BDePaolo%2C+Donald+J&rft.aulast=Basu&rft.aufirst=Anirban&rft.date=2016-10-04&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Environmental+science+%26+technology&rft.issn=1520-5851&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-08-22 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 ER - TY - JOUR T1 - Contaminant point source localization error estimates as functions of data quantity and model quality AN - 1861081906; 785479-8 AB - We develop empirically-grounded error envelopes for localization of a point contamination release event in the saturated zone of a previously uncharacterized heterogeneous aquifer into which a number of plume-intercepting wells have been drilled. We assume that flow direction in the aquifer is known exactly and velocity is known to within a factor of two of our best guess from well observations prior to source identification. Other aquifer and source parameters must be estimated by interpretation of well breakthrough data via the advection-dispersion equation. We employ high performance computing to generate numerous random realizations of aquifer parameters and well locations, simulate well breakthrough data, and then employ unsupervised machine optimization techniques to estimate the most likely spatial (or space-time) location of the source. Tabulating the accuracy of these estimates from the multiple realizations, we relate the size of 90% and 95% confidence envelopes to the data quantity (number of wells) and model quality (fidelity of ADE interpretation model to actual concentrations in a heterogeneous aquifer with channelized flow). We find that for purely spatial localization of the contaminant source, increased data quantities can make up for reduced model quality. For space-time localization, we find similar qualitative behavior, but significantly degraded spatial localization reliability and less improvement from extra data collection. Since the space-time source localization problem is much more challenging, we also tried a multiple-initial-guess optimization strategy. This greatly enhanced performance, but gains from additional data collection remained limited. JF - Journal of Contaminant Hydrology AU - Hansen, Scott K AU - Vesselinov, Velimir V Y1 - 2016/10// PY - 2016 DA - October 2016 SP - 74 EP - 85 PB - Elsevier, Amsterdam VL - 193 SN - 0169-7722, 0169-7722 KW - contaminant plumes KW - data acquisition KW - data processing KW - observation wells KW - simulation KW - reservoir rocks KW - ground water KW - spatial distribution KW - saturated zone KW - errors KW - stochastic processes KW - movement KW - algorithms KW - water pollution KW - pollutants KW - statistical analysis KW - graphic display KW - pollution KW - optimization KW - channels KW - aquifers KW - models KW - heterogeneous materials KW - mathematical methods KW - quality control KW - reservoir properties KW - temporal distribution KW - accuracy KW - point sources KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861081906?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Contaminant+Hydrology&rft.atitle=Contaminant+point+source+localization+error+estimates+as+functions+of+data+quantity+and+model+quality&rft.au=Hansen%2C+Scott+K%3BVesselinov%2C+Velimir+V&rft.aulast=Hansen&rft.aufirst=Scott&rft.date=2016-10-01&rft.volume=193&rft.issue=&rft.spage=74&rft.isbn=&rft.btitle=&rft.title=Journal+of+Contaminant+Hydrology&rft.issn=01697722&rft_id=info:doi/10.1016%2Fj.jconhyd.2016.09.003 L2 - http://www.sciencedirect.com/science/journal/01697722 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Number of references - 35 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - accuracy; algorithms; aquifers; channels; contaminant plumes; data acquisition; data processing; errors; graphic display; ground water; heterogeneous materials; mathematical methods; models; movement; observation wells; optimization; point sources; pollutants; pollution; quality control; reservoir properties; reservoir rocks; saturated zone; simulation; spatial distribution; statistical analysis; stochastic processes; temporal distribution; water pollution DO - http://dx.doi.org/10.1016/j.jconhyd.2016.09.003 ER - TY - JOUR T1 - Collective ratchet effects and reversals for active matter particles on quasi-one-dimensional asymmetric substrates AN - 1837312236; PQ0003756986 AB - Using computer simulations, we study a two-dimensional system of sterically interacting self-mobile run-and-tumble disk-shaped particles with an underlying periodic quasi-one-dimensional asymmetric substrate, and show that a rich variety of collective active ratchet behaviors arise as a function of particle density, activity, substrate period, and the maximum force exerted by the substrate. The net dc drift, or ratchet transport flux, is nonmonotonic since it increases with increased activity but is diminished by the onset of self-clustering of the active particles. Increasing the particle density decreases the ratchet transport flux for shallow substrates but increases the ratchet transport flux for deep substrates due to collective hopping events. At the highest particle densities, the ratchet motion is destroyed by a self-jamming effect. We show that it is possible to realize reversals of the direction of the net dc drift in the deep substrate limit when multiple rows of active particles can be confined in each substrate minimum, permitting emergent particle-like excitations to appear that experience an inverted effective substrate potential. We map out a phase diagram of the forward and reverse ratchet effects as a function of the particle density, activity, and substrate properties. JF - Soft Matter AU - McDermott, Danielle AU - Olson Reichhardt, Cynthia J AU - Reichhardt, Charles AD - Theoretical Division; Los Alamos National Laboratory; Los Alamos; New Mexico 87545; USA; +1 505 606 0917; +1 505 665 1134 Y1 - 2016/10// PY - 2016 DA - October 2016 SP - 8606 EP - 8615 PB - Royal Society of Chemistry VL - 12 IS - 41 SN - 1744-683X, 1744-683X KW - Biotechnology and Bioengineering Abstracts KW - Mathematical models KW - Drift KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1837312236?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Soft+Matter&rft.atitle=Collective+ratchet+effects+and+reversals+for+active+matter+particles+on+quasi-one-dimensional+asymmetric+substrates&rft.au=McDermott%2C+Danielle%3BOlson+Reichhardt%2C+Cynthia+J%3BReichhardt%2C+Charles&rft.aulast=McDermott&rft.aufirst=Danielle&rft.date=2016-10-01&rft.volume=12&rft.issue=41&rft.spage=8606&rft.isbn=&rft.btitle=&rft.title=Soft+Matter&rft.issn=1744683X&rft_id=info:doi/10.1039%2Fc6sm01394e LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-11-01 N1 - Number of references - 64 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Mathematical models; Drift DO - http://dx.doi.org/10.1039/c6sm01394e ER - TY - JOUR T1 - Hollow fiber integrated microfluidic platforms for in vitro Co-culture of multiple cell types AN - 1827908736; PQ0003689210 AB - This study demonstrates a rapid prototyping approach for fabricating and integrating porous hollow fibers (HFs) into microfluidic device. Integration of HF can enhance mass transfer and recapitulate tubular shapes for tissue-engineered environments. We demonstrate the integration of single or multiple HFs, which can give the users the flexibility to control the total surface area for tissue development. We also present three microfluidic designs to enable different co-culture conditions such as the ability to co-culture multiple cell types simultaneously on a flat and tubular surface, or inside the lumen of multiple HFs. Additionally, we introduce a pressurized cell seeding process that can allow the cells to uniformly adhere on the inner surface of HFs without losing their viabilities. Co-cultures of lung epithelial cells and microvascular endothelial cells were demonstrated on the different platforms for at least five days. Overall, these platforms provide new opportunities for co-culturing of multiple cell types in a single device to reconstruct native tissue micro-environment for biomedical and tissue engineering research. JF - Biomedical Microdevices AU - Huang, Jen-Huang AU - Harris, Jennifer F AU - Nath, Pulak AU - Iyer, Rashi AD - Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA, pulakn@lanl.gov Y1 - 2016/10// PY - 2016 DA - October 2016 SP - 1 EP - 8 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 18 IS - 5 SN - 1387-2176, 1387-2176 KW - Biotechnology and Bioengineering Abstracts KW - Endothelial cells KW - Integration KW - Fibers KW - Epithelial cells KW - Microvasculature KW - Microfluidics KW - Lung KW - Surface area KW - Mass transfer KW - Tissue engineering KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1827908736?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=Early+explorations%3B+Part+1%2C+First+observations&rft.au=Anonymous&rft.aulast=Anonymous&rft.aufirst=&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=11&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Number of references - 23 N1 - Last updated - 2016-10-12 N1 - SubjectsTermNotLitGenreText - Endothelial cells; Microvasculature; Epithelial cells; Fibers; Integration; Microfluidics; Lung; Surface area; Mass transfer; Tissue engineering DO - http://dx.doi.org/10.1007/s10544-016-0102-y ER - TY - JOUR T1 - ChemCam investigation of the John Klein and Cumberland drill holes and tailings, Gale Crater, Mars AN - 1824215082; 2016-081528 AB - The ChemCam instrument on the Mars Science Laboratory rover analyzed the rock surface, drill hole walls, tailings, and unprocessed and sieved dump piles to investigate chemical variations with depth in the first two martian drill holes and possible fractionation or segregation effects of the drilling and sample processing. The drill sites are both in Sheepbed Mudstone, the lowest exposed member of the Yellowknife Bay formation. Yellowknife Bay is composed of detrital basaltic materials in addition to clay minerals and an amorphous component. The drill tailings are a mixture of basaltic sediments and diagenetic material like calcium sulfate veins, while the shots on the drill site surface and walls of the drill holes are closer to those pure end members. The sediment dumped from the sample acquisition, processing, and handling subsystem is of similar composition to the tailings; however, due to the specifics of the drilling process the tailings and dump piles come from different depths within the hole. This allows the ChemCam instrument to analyze samples representing the bulk composition from different depths. On the pre-drill surfaces, the Cumberland site has a greater amount of CaO and evidence for calcium sulfate veins, than the John Klein site. However, John Klein has a greater amount of calcium sulfate veins below the surface, as seen in mapping, drill hole wall analysis, and observations in the drill tailings and dump pile. In addition, the Cumberland site does not have any evidence of variations in bulk composition with depth down the drill hole, while the John Klein site has evidence for a greater amount of CaO (calcium sulfates) in the top portion of the hole compared to the middle section of the hole, where the drill sample was collected. JF - Icarus AU - Jackson, Ryan Steele AU - Wiens, R C AU - Vaniman, D T AU - Beegle, L AU - Gasnault, O AU - Newsom, H E AU - Maurice, S AU - Meslin, P Y AU - Clegg, S AU - Cousin, A AU - Schroeder, S AU - Williams, J M Y1 - 2016/10// PY - 2016 DA - October 2016 SP - 330 EP - 341 PB - Elsevier, New York, NY VL - 277 SN - 0019-1035, 0019-1035 KW - calcium sulfate KW - calcium KW - Mars KW - Gale Crater KW - emission spectra KW - sedimentary rocks KW - sampling KW - LIBS spectra KW - spectra KW - drilling KW - chemical composition KW - basaltic composition KW - ChemCam instrument KW - alkaline earth metals KW - experimental studies KW - mine waste KW - mudstone KW - Yellowknife Bay Formation KW - Sheepbed Mudstone KW - terrestrial planets KW - planets KW - boreholes KW - metals KW - diagenesis KW - Mars Science Laboratory KW - tailings KW - clastic rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215082?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=ChemCam+investigation+of+the+John+Klein+and+Cumberland+drill+holes+and+tailings%2C+Gale+Crater%2C+Mars&rft.au=Jackson%2C+Ryan+Steele%3BWiens%2C+R+C%3BVaniman%2C+D+T%3BBeegle%2C+L%3BGasnault%2C+O%3BNewsom%2C+H+E%3BMaurice%2C+S%3BMeslin%2C+P+Y%3BClegg%2C+S%3BCousin%2C+A%3BSchroeder%2C+S%3BWilliams%2C+J+M&rft.aulast=Jackson&rft.aufirst=Ryan&rft.date=2016-10-01&rft.volume=277&rft.issue=&rft.spage=330&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2016.04.026 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 23 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-09-29 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; basaltic composition; boreholes; calcium; calcium sulfate; ChemCam instrument; chemical composition; clastic rocks; diagenesis; drilling; emission spectra; experimental studies; Gale Crater; LIBS spectra; Mars; Mars Science Laboratory; metals; mine waste; mudstone; planets; sampling; sedimentary rocks; Sheepbed Mudstone; spectra; tailings; terrestrial planets; Yellowknife Bay Formation DO - http://dx.doi.org/10.1016/j.icarus.2016.04.026 ER - TY - JOUR T1 - Full-field predictions of ice dynamic recrystallisation under simple shear conditions AN - 1819897222; 2016-081429 AB - Understanding the flow of ice on the microstructural scale is essential for improving our knowledge of large-scale ice dynamics, and thus our ability to predict future changes of ice sheets. Polar ice behaves anisotropically during flow, which can lead to strain localisation. In order to study how dynamic recrystallisation affects to strain localisation in deep levels of polar ice sheets, we present a series of numerical simulations of ice polycrystals deformed under simple-shear conditions. The models explicitly simulate the evolution of microstructures using a full-field approach, based on the coupling of a viscoplastic deformation code (VPFFT) with dynamic recrystallisation codes. The simulations provide new insights into the distribution of stress, strain rate and lattice orientation fields with progressive strain, up to a shear strain of three. Our simulations show how the recrystallisation processes have a strong influence on the resulting microstructure (grain size and shape), while the development of lattice preferred orientations (LPO) appears to be less affected. Activation of non-basal slip systems is enhanced by recrystallisation and induces a strain hardening behaviour up to the onset of strain localisation and strain weakening behaviour. Simulations demonstrate that the strong intrinsic anisotropy of ice crystals is transferred to the polycrystalline scale and results in the development of strain localisation bands than can be masked by grain boundary migration. Therefore, the finite-strain history is non-directly reflected by the final microstructure. Masked strain localisation can be recognised in ice cores, such as the EDML, from the presence of stepped boundaries, microshear and grains with zig-zag geometries. JF - Earth and Planetary Science Letters AU - Llorens, Maria-Gema AU - Griera, Albert AU - Bons, Paul D AU - Lebensohn, Ricardo A AU - Evans, Lynn A AU - Jansen, Daniela AU - Weikusat, Ilka Y1 - 2016/09/15/ PY - 2016 DA - 2016 Sep 15 SP - 233 EP - 242 PB - Elsevier, Amsterdam VL - 450 SN - 0012-821X, 0012-821X KW - ice cores KW - experimental studies KW - numerical models KW - lattice KW - strain KW - viscoplastic materials KW - stress KW - microstructure KW - glaciers KW - deformation KW - simulation KW - recrystallization KW - ice sheets KW - preferred orientation KW - ice movement KW - grain boundaries KW - dynamics KW - rheology KW - ice KW - shear KW - polycrystalline materials KW - glacial geology KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819897222?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+and+Planetary+Science+Letters&rft.atitle=Full-field+predictions+of+ice+dynamic+recrystallisation+under+simple+shear+conditions&rft.au=Llorens%2C+Maria-Gema%3BGriera%2C+Albert%3BBons%2C+Paul+D%3BLebensohn%2C+Ricardo+A%3BEvans%2C+Lynn+A%3BJansen%2C+Daniela%3BWeikusat%2C+Ilka&rft.aulast=Llorens&rft.aufirst=Maria-Gema&rft.date=2016-09-15&rft.volume=450&rft.issue=&rft.spage=233&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2016.06.045 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 50 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-16 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - deformation; dynamics; experimental studies; glacial geology; glaciers; grain boundaries; ice; ice cores; ice movement; ice sheets; lattice; microstructure; numerical models; polycrystalline materials; preferred orientation; recrystallization; rheology; shear; simulation; strain; stress; viscoplastic materials DO - http://dx.doi.org/10.1016/j.epsl.2016.06.045 ER - TY - JOUR T1 - Structure and thermodynamics of uranium-containing iron garnets AN - 1815667793; 2016-076822 AB - Use of crystalline garnet as a waste form phase appears to be advantageous for accommodating actinides from nuclear waste. Previous studies show that large amounts of uranium (U) and its analogues such as cerium (Ce) and thorium (Th) can be incorporated into the garnet structure. In this study, we synthesized U loaded garnet phases, Ca (sub 3) U (sub x) Zr (sub 2-) (sub x) Fe (sub 3) O (sub 12) (x = 0.5-0.7), along with the endmember phase, Ca (sub 3) (Zr (sub 2) )SiFe (super 3+) (sub 2) O (sub 12) , for comparison. The oxidation states of U were determined by X-ray photoelectron and absorption spectroscopies, revealing the presence of mixed pentavalent and hexavalent uranium in the phases with x = 0.6 and 0.7. The oxidation states and coordination environments of Fe were measured using transmission (super 57) Fe-Mossbauer spectroscopy, which shows that all iron is tetrahedrally coordinated Fe (super 3+) . U substitution had a significant effect on local environments, the extent of U substitution within this range had a minimal effect on the structure, and unlike in the x = 0 sample, Fe exists in two different environments in the substituted garnets. The enthalpies of formation of garnet phases from constituent oxides and elements were first time determined by high temperature oxide melt solution calorimetry. The results indicate that these substituted garnets are thermodynamically stable under reducing conditions. Our structural and thermodynamic analysis further provides explanation for the formation of natural uranium garnet, elbrusite-(Zr), and supports the potential use of Ca (sub 3) U (sub x) Zr (sub 2-) (sub x) Fe (sub 3) O (sub 12) as viable waste form phases for U and other actinides. JF - Geochimica et Cosmochimica Acta AU - Guo, Xiaofeng AU - Navrotsky, Alexandra AU - Kukkadapu, Ravi K AU - Engelhard, Mark H AU - Lanzirotti, Antonio AU - Newville, Matthew AU - Ilton, Eugene S AU - Sutton, Stephen R AU - Xu, Hongwu Y1 - 2016/09/15/ PY - 2016 DA - 2016 Sep 15 SP - 269 EP - 281 PB - Elsevier, New York, NY VL - 189 SN - 0016-7037, 0016-7037 KW - silicates KW - hazardous waste KW - X-ray diffraction data KW - isotopes KW - garnet group KW - crystal structure KW - reservoir rocks KW - radioactive waste KW - electron probe data KW - cerium KW - XANES spectra KW - radioactive isotopes KW - mineral composition KW - chemical reactions KW - orthosilicates KW - spectra KW - rare earths KW - X-ray photoelectron spectra KW - thermodynamic properties KW - chemical composition KW - Mossbauer spectra KW - calorimetry KW - pollutants KW - oxidation KW - pollution KW - X-ray spectra KW - nesosilicates KW - metals KW - mathematical methods KW - thorium KW - reservoir properties KW - uranium KW - waste disposal KW - crystal chemistry KW - actinides KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815667793?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Structure+and+thermodynamics+of+uranium-containing+iron+garnets&rft.au=Guo%2C+Xiaofeng%3BNavrotsky%2C+Alexandra%3BKukkadapu%2C+Ravi+K%3BEngelhard%2C+Mark+H%3BLanzirotti%2C+Antonio%3BNewville%2C+Matthew%3BIlton%2C+Eugene+S%3BSutton%2C+Stephen+R%3BXu%2C+Hongwu&rft.aulast=Guo&rft.aufirst=Xiaofeng&rft.date=2016-09-15&rft.volume=189&rft.issue=&rft.spage=269&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2016.05.043 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 79 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-09-01 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - actinides; calorimetry; cerium; chemical composition; chemical reactions; crystal chemistry; crystal structure; electron probe data; garnet group; hazardous waste; isotopes; mathematical methods; metals; mineral composition; Mossbauer spectra; nesosilicates; orthosilicates; oxidation; pollutants; pollution; radioactive isotopes; radioactive waste; rare earths; reservoir properties; reservoir rocks; silicates; spectra; thermodynamic properties; thorium; uranium; waste disposal; X-ray diffraction data; X-ray photoelectron spectra; X-ray spectra; XANES spectra DO - http://dx.doi.org/10.1016/j.gca.2016.05.043 ER - TY - JOUR T1 - A record of uranium series transport at Nopal I, Sierra Pena Blanca, Mexico; implications for natural uranium deposits and radioactive waste repositories AN - 1812216053; 2016-068934 AB - Studies of uranium-series (U-series) disequilibria within and around ore deposits provide valuable information on the extent and timing of actinide mobility, via mineral-fluid interaction, over a range of spatial and temporal scales. Such information is useful in studies of analogs of high-level nuclear-waste repositories, as well as for mining and mineral extraction sites, locations of previous nuclear weapons testing, and legacy nuclear waste contamination. In this study we present isotope dilution mass spectrometry U-series measurements for fracture-fill materials (hematite, goethite, kaolinite, calcite, dolomite and quartz) from one such analog; the Nopal I uranium ore deposit situated at Pena Blanca in the Chihuahua region of northern Mexico. The ore deposit is located in fractured, unsaturated volcanic tuff and fracture-fill materials from surface fractures as well as fractures in a vertical drill core have been analyzed. High uranium concentrations in the fracture-fill materials (between 12 and 7700 ppm) indicate uranium mobility and transport from the deposit. Uranium concentrations generally decrease with horizontal distance away from the deposit but in this deposit there is no trend with depth below the surface. Isotopic activity ratios, (super 238) U- (super 234) U- (super 230) Th- (super 232) Th linear age trends, and U-Th-Pa model ages indicate an actinide mobility evolution that can be characterized as complex and varied. There is evidence of both open and closed system behavior for uranium, depending on both sample and time-scale. The (super 234) U/ (super 238) U activity ratios indicate U mobility from 1.2-0.2 Ma. In the last 0.2 Ma there is isotopic evidence for some U mobility but mostly U immobility. In almost all cases the Th-Pa radionuclides studied here have been immobile for the past 200 ka. Radium appears to have been recently (0.1-8 ka) mobile due to ongoing fluid flow in the fractures. Overall, the mainly closed system behavior for U-Th-Pa over the past approximately 200 ka provides an indicator of the geochemical immobility of these actinides over time-scales relevant for potential nuclear waste repositories situated in fractured, unsaturated tuff. JF - Chemical Geology AU - Denton, J S AU - Goldstein, S J AU - Paviet, P AU - Nunn, A J AU - Amato, R S AU - Hinrichs, K A Y1 - 2016/09/15/ PY - 2016 DA - 2016 Sep 15 SP - 12 EP - 27 PB - Elsevier, Amsterdam VL - 434 SN - 0009-2541, 0009-2541 KW - hazardous waste KW - fractured materials KW - volcanic rocks KW - isotopes KW - igneous rocks KW - thermal ionization mass spectra KW - mass spectra KW - Chihuahua Mexico KW - Th/U KW - Nopal Formation KW - uranium disequilibrium KW - reservoir rocks KW - radioactive waste KW - radioactive isotopes KW - water-rock interaction KW - transport KW - dates KW - absolute age KW - Nopal Deposit KW - tuff KW - spectra KW - Pozos Formation KW - alkaline earth metals KW - Colorados Formation KW - radium KW - pollutants KW - isotope ratios KW - pollution KW - pyroclastics KW - uranium ores KW - Pena Blanca Mexico KW - Mexico KW - ion chromatograms KW - metals KW - chromatograms KW - metal ores KW - reservoir properties KW - uranium KW - U-238/U-234 KW - northern Mexico KW - mobilization KW - waste disposal KW - actinides KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812216053?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=A+record+of+uranium+series+transport+at+Nopal+I%2C+Sierra+Pena+Blanca%2C+Mexico%3B+implications+for+natural+uranium+deposits+and+radioactive+waste+repositories&rft.au=Denton%2C+J+S%3BGoldstein%2C+S+J%3BPaviet%2C+P%3BNunn%2C+A+J%3BAmato%2C+R+S%3BHinrichs%2C+K+A&rft.aulast=Denton&rft.aufirst=J&rft.date=2016-09-15&rft.volume=434&rft.issue=&rft.spage=12&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2016.03.034 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 115 N1 - Document feature - illus. incl. 4 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-08-18 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - absolute age; actinides; alkaline earth metals; Chihuahua Mexico; chromatograms; Colorados Formation; dates; fractured materials; hazardous waste; igneous rocks; ion chromatograms; isotope ratios; isotopes; mass spectra; metal ores; metals; Mexico; mobilization; Nopal Deposit; Nopal Formation; northern Mexico; Pena Blanca Mexico; pollutants; pollution; Pozos Formation; pyroclastics; radioactive isotopes; radioactive waste; radium; reservoir properties; reservoir rocks; spectra; Th/U; thermal ionization mass spectra; transport; tuff; U-238/U-234; uranium; uranium disequilibrium; uranium ores; volcanic rocks; waste disposal; water-rock interaction DO - http://dx.doi.org/10.1016/j.chemgeo.2016.03.034 ER - TY - JOUR T1 - A waveform detector that targets template-decorrelated signals and achieves its predicted performance; Part I, Demonstration with IMS data AN - 1828846245; 2016-087273 AB - Waveform correlation detectors used in seismic monitoring scan multichannel data to test two competing hypotheses: that the data contain (1) a noisy, amplitude-scaled version of a template waveform or (2) only noise. In reality, seismic wavefields include signals triggered by nontarget sources (background seismicity) and target signals that are only partially correlated with the waveform template. We reform the waveform correlation detector hypothesis test to accommodate deterministic uncertainty in template-to-target waveform similarity and thereby derive a new detector from convex set projections (the cone detector) for use in explosion monitoring. Our analyses give probability density functions that quantify the detectors' degraded performance with decreasing waveform similarity. We then apply our results to three announced North Korean nuclear tests and use International Monitoring System (IMS) arrays to determine the probability that low magnitude, off-site explosions can be reliably detected with a given waveform template. We demonstrate that cone detectors provide (1) an improved predictive capability over correlation detectors to identify such spatially separated explosive sources, (2) competitive detection rates, and (3) reduced false alarms on background seismicity. Online Material: Description and illustration of several theoretical and practical aspects of implementing the correlation and cone detector on geophysical waveform data. JF - Bulletin of the Seismological Society of America AU - Carmichael, Joshua D Y1 - 2016/09/13/ PY - 2016 DA - 2016 Sep 13 SP - 1998 EP - 2012 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 5 SN - 0037-1106, 0037-1106 KW - technology KW - monitoring KW - Far East KW - explosions KW - North Korea KW - Korea KW - detection KW - seismicity KW - focus KW - algorithms KW - nuclear explosions KW - Asia KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846245?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=A+waveform+detector+that+targets+template-decorrelated+signals+and+achieves+its+predicted+performance%3B+Part+I%2C+Demonstration+with+IMS+data&rft.au=Carmichael%2C+Joshua+D&rft.aulast=Carmichael&rft.aufirst=Joshua&rft.date=2016-09-13&rft.volume=106&rft.issue=5&rft.spage=1998&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120160047 L2 - http://bssa.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 20 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; Asia; detection; earthquakes; explosions; Far East; focus; instruments; Korea; monitoring; North Korea; nuclear explosions; seismicity; technology DO - http://dx.doi.org/10.1785/0120160047 ER - TY - JOUR T1 - A computationally efficient parallel Levenberg-Marquardt algorithm for highly parameterized inverse model analyses AN - 1861082945; 785517-15 AB - Inverse modeling seeks model parameters given a set of observations. However, for practical problems because the number of measurements is often large and the model parameters are also numerous, conventional methods for inverse modeling can be computationally expensive. We have developed a new, computationally efficient parallel Levenberg-Marquardt method for solving inverse modeling problems with a highly parameterized model space. Levenberg-Marquardt methods require the solution of a linear system of equations which can be prohibitively expensive to compute for moderate to large-scale problems. Our novel method projects the original linear problem down to a Krylov subspace such that the dimensionality of the problem can be significantly reduced. Furthermore, we store the Krylov subspace computed when using the first damping parameter and recycle the subspace for the subsequent damping parameters. The efficiency of our new inverse modeling algorithm is significantly improved using these computational techniques. We apply this new inverse modeling method to invert for random transmissivity fields in 2-D and a random hydraulic conductivity field in 3-D. Our algorithm is fast enough to solve for the distributed model parameters (transmissivity) in the model domain. The algorithm is coded in Julia and implemented in the MADS computational framework ( (sub url href="http://mads.lanl.gov" (super http://mads.lanl.gov (sub /url (super ). By comparing with Levenberg-Marquardt methods using standard linear inversion techniques such as QR or SVD methods, our Levenberg-Marquardt method yields a speed-up ratio on the order of (sub math xmlns="http://www.w3.org/1998/Math/MathML" display="inline" altimg="urn:x-wiley:00431397:media:wrcr22226:wrcr22226-math-0001" wiley:location="equation/wrcr22226-math-0001.png" (super (sub mrow (super (sub mo (super approximately (sub /mo (super (sub mrow (super (sub msup (super (sub mrow (super (sub mn (super 10 (sub /mn (super (sub /mrow (super (sub mn (super 1 (sub /mn (super (sub /msup (super (sub /mrow (super (sub /mrow (super (sub /math (super to (sub math xmlns="http://www.w3.org/1998/Math/MathML" display="inline" altimg="urn:x-wiley:00431397:media:wrcr22226:wrcr22226-math-0002" wiley:location="equation/wrcr22226-math-0002.png" (super (sub mrow (super (sub mo (super approximately (sub /mo (super (sub mrow (super (sub msup (super (sub mrow (super (sub mn (super 10 (sub /mn (super (sub /mrow (super (sub mn (super 2 (sub /mn (super (sub /msup (super (sub /mrow (super (sub /mrow (super (sub /math (super in a multicore computational environment. Therefore, our new inverse modeling method is a powerful tool for characterizing subsurface heterogeneity for moderate to large-scale problems. Abstract Copyright Published 2016. This article is a U.S. Government work and is in the public domain in the USA. JF - Water Resources Research AU - Lin, Youzuo AU - O'Malley, Daniel AU - Vesselinov, Velimir V Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 6948 EP - 6977 PB - American Geophysical Union, Washington, DC VL - 52 IS - 9 SN - 0043-1397, 0043-1397 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861082945?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=A+computationally+efficient+parallel+Levenberg-Marquardt+algorithm+for+highly+parameterized+inverse+model+analyses&rft.au=Lin%2C+Youzuo%3BO%27Malley%2C+Daniel%3BVesselinov%2C+Velimir+V&rft.aulast=Lin&rft.aufirst=Youzuo&rft.date=2016-09-01&rft.volume=52&rft.issue=9&rft.spage=6948&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2016WR019028 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2017-01-24 N1 - CODEN - WRERAQ DO - http://dx.doi.org/10.1002/2016WR019028 ER - TY - JOUR T1 - Resonant Ultrasound Spectroscopy studies of Berea sandstone at high temperature AN - 1861077203; 785542-9 AB - Resonant Ultrasound Spectroscopy was used to determine the elastic moduli of Berea sandstone from room temperature to 478 K. Sandstone is a common component of oil reservoirs, and the temperature range was chosen to be representative of typical downhole conditions, down to about 8 km. In agreement with previous works, Berea sandstone was found to be relatively soft with a bulk modulus of approximately 6 GPa as compared to 37.5 GPa for alpha -quartz at room temperature and pressure. It was found that Berea sandstone undergoes a nearly equal 17% softening in bulk modulus between room temperature and 385 K, followed by an abnormal behavior of similar stiffening between 385 K and 478 K. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Davis, Eric S AU - Sturtevant, Blake T AU - Sinha, Dipen N AU - Pantea, Cristian Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 6401 EP - 6410 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 9 SN - 2169-9313, 2169-9313 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861077203?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Resonant+Ultrasound+Spectroscopy+studies+of+Berea+sandstone+at+high+temperature&rft.au=Davis%2C+Eric+S%3BSturtevant%2C+Blake+T%3BSinha%2C+Dipen+N%3BPantea%2C+Cristian&rft.aulast=Davis&rft.aufirst=Eric&rft.date=2016-09-01&rft.volume=121&rft.issue=9&rft.spage=6401&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2016JB013410 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1002/2016JB013410 ER - TY - JOUR T1 - A calcium-in-olivine geohygrometer and its application to subduction zone magmatism AN - 1859792047; 2017-004867 JF - Journal of Petrology AU - Gavrilenko, Maxim AU - Herzberg, Claude AU - Vidito, Christopher AU - Carr, Michael J AU - Tenner, Travis AU - Ozerov, Alexey Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 1811 EP - 1832 PB - Oxford University Press, Oxford VL - 57 IS - 9 SN - 0022-3530, 0022-3530 KW - United States KW - silicates KW - calcium KW - Gorely KW - volcanic rocks KW - subduction zones KW - Northeast Pacific KW - Kamchatka Peninsula KW - igneous rocks KW - Costa Rica KW - olivine group KW - komatiite KW - Russian Federation KW - Siqueiros fracture zone KW - Kamchatka Russian Federation KW - Commonwealth of Independent States KW - olivine KW - basalts KW - orthosilicates KW - Platanar KW - lithogeochemistry KW - Asia KW - geochemistry KW - Klyuchevskaya Sopka KW - East Pacific KW - alkaline earth metals KW - Shiveluch KW - Hawaii KW - East Pacific Ocean Islands KW - nesosilicates KW - Cerro Negro KW - North Pacific KW - metals KW - Pacific Ocean KW - mid-ocean ridge basalts KW - Barva KW - Oceania KW - Polynesia KW - Irazu KW - Central America KW - 02C:Geochemistry of rocks, soils, and sediments KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859792047?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Petrology&rft.atitle=A+calcium-in-olivine+geohygrometer+and+its+application+to+subduction+zone+magmatism&rft.au=Gavrilenko%2C+Maxim%3BHerzberg%2C+Claude%3BVidito%2C+Christopher%3BCarr%2C+Michael+J%3BTenner%2C+Travis%3BOzerov%2C+Alexey&rft.aulast=Gavrilenko&rft.aufirst=Maxim&rft.date=2016-09-01&rft.volume=57&rft.issue=9&rft.spage=1811&rft.isbn=&rft.btitle=&rft.title=Journal+of+Petrology&rft.issn=00223530&rft_id=info:doi/10.1093%2Fpetrology%2Fegw062 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - Number of references - 147 N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2017-01-19 N1 - CODEN - JPTGAD N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Asia; Barva; basalts; calcium; Central America; Cerro Negro; Commonwealth of Independent States; Costa Rica; East Pacific; East Pacific Ocean Islands; geochemistry; Gorely; Hawaii; igneous rocks; Irazu; Kamchatka Peninsula; Kamchatka Russian Federation; Klyuchevskaya Sopka; komatiite; lithogeochemistry; metals; mid-ocean ridge basalts; nesosilicates; North Pacific; Northeast Pacific; Oceania; olivine; olivine group; orthosilicates; Pacific Ocean; Platanar; Polynesia; Russian Federation; Shiveluch; silicates; Siqueiros fracture zone; subduction zones; United States; volcanic rocks DO - http://dx.doi.org/10.1093/petrology/egw062 ER - TY - JOUR T1 - Geographical environment determinism for discovery of mineral deposits AN - 1840615108; 2016-093946 AB - The spatial distribution of metallic mineral deposits discovered in China during 1901 to 2007 shows that nearly 85% of the total 2906 metallic mineral deposits with the magnitude greater than medium-size are located on the southeastern side of the famous Heihe-Tengchong "geo-demographic demarcation line". This spatial pattern is consistent with the population distribution of China, indicating that the spatial distribution of discovered mineral deposits may be related to exploration level that is strongly restricted by the geographic environments. We found that the number of discovered deposits per unit area in explored regions increases with the exploration level, following a power-law model. From this model, if the geological, geochemical and geophysical exploration in the NW region of the geo-demographic demarcation line reaches the same level as that in the SE region of the line, about 2000 metallic mineral deposits with magnitudes greater than medium-size remain to be discovered in the NW region of China. JF - Journal of Geochemical Exploration AU - Ma, Tuhua AU - Li, Changjiang AU - Lu, Zhiming Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 163 EP - 168 PB - Elsevier, Amsterdam-New York VL - 168 SN - 0375-6742, 0375-6742 KW - mineral exploration KW - Far East KW - power law KW - statistical analysis KW - decision-making KW - Heihe-Tengchong line KW - models KW - spatial distribution KW - discoveries KW - metal ores KW - temporal distribution KW - Asia KW - fractals KW - China KW - 27A:Economic geology, geology of ore deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840615108?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Progress+in+Computational+Fluid+Dynamics&rft.atitle=Modelling+fluid+flow+in+domains+containing+moving+interfaces&rft.au=Carrington%2C+David+B%3BMunoz%2C+Dominic+A%3BHeinrich%2C+Juan+C&rft.aulast=Carrington&rft.aufirst=David&rft.date=2014-01-01&rft.volume=14&rft.issue=3&rft.spage=139&rft.isbn=&rft.btitle=&rft.title=Progress+in+Computational+Fluid+Dynamics&rft.issn=14684349&rft_id=info:doi/10.1504%2FPCFD.2014.062429 L2 - http://www.sciencedirect.com/science/journal/03756742 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 25 N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2016-11-17 N1 - CODEN - JGCEAT N1 - SubjectsTermNotLitGenreText - Asia; China; decision-making; discoveries; Far East; fractals; Heihe-Tengchong line; metal ores; mineral exploration; models; power law; spatial distribution; statistical analysis; temporal distribution DO - http://dx.doi.org/10.1016/j.gexplo.2016.07.001 ER - TY - JOUR T1 - Lessons learned from the pioneering hot dry rock project at Fenton Hill, USA AN - 1824212569; 2016-083412 AB - Interest in geothermal energy production has grown rapidly in recent years due to the increasing demand for clean, renewable, domestic energy. Recent publications have suggested that geothermal energy from Enhanced Geothermal Systems could satisfy a large portion of the energy needs in the U.S. if the technology were implemented on a large scale. Pertinent to this goal are many of the lessons learned from the pioneering Hot Dry Rock project aimed at producing usable energy form the heat of the earth, conducted from 1970 to 1995 at Fenton Hill, New Mexico, USA. During this project, the Los Alamos National Laboratory created and tested two reservoirs at depths in the range of 2.8-3.5 km in crystalline rock formations underlying the Fenton Hill site. Thermal energies in the range of 3-10 MWt were produced demonstrating the technical feasibility of the concept. Many important lessons were learned regarding the creation, engineering and operation of such subsurface systems-these lessons will prove valuable as the geothermal community moves towards the goal of realizing the immense potential of this ubiquitous renewable energy resource. The purpose of this paper is to provide a brief, easy to read overview of this pioneering project. JF - Geothermics AU - Kelkar, Sharad AU - WoldeGabriel, Giday AU - Rehfeldt, Kenneth Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 5 EP - 14 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - North America KW - experimental studies KW - well stimulation KW - site exploration KW - Sandoval County New Mexico KW - Jemez Field KW - enhanced recovery KW - New Mexico KW - hot dry rocks KW - volcanic fields KW - Rio Grande Rift KW - history KW - geothermal energy KW - geothermal fields KW - Fenton Hill KW - microseisms KW - reservoir properties KW - hydraulic conductivity KW - permeability KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212569?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Lessons+learned+from+the+pioneering+hot+dry+rock+project+at+Fenton+Hill%2C+USA&rft.au=Kelkar%2C+Sharad%3BWoldeGabriel%2C+Giday%3BRehfeldt%2C+Kenneth&rft.aulast=Kelkar&rft.aufirst=Sharad&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=5&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.08.008 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 75 N1 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - enhanced recovery; experimental studies; Fenton Hill; geothermal energy; geothermal fields; history; hot dry rocks; hydraulic conductivity; Jemez Field; microseisms; New Mexico; North America; permeability; reservoir properties; Rio Grande Rift; Sandoval County New Mexico; site exploration; United States; volcanic fields; well stimulation DO - http://dx.doi.org/10.1016/j.geothermics.2015.08.008 ER - TY - JOUR T1 - Source Spectra of the First Four Source Physics Experiments (SPE) Explosions from the Frequency-Domain Moment Tensor Inversion AN - 1811901120; PQ0003521208 AB - I used seismic waveforms recorded within 2 km from the epicenter of the first four Source Physics Experiments (SPE) explosions to invert for the moment tensor spectra of these explosions. I employed a 1D Earth model for Green's function calculations. The model was developed from P- and Rg-wave travel times and amplitudes. I selected data for the inversion based on the criterion that they had consistent travel times and amplitude behavior as those predicted by the 1D model. Because of limited azimuthal coverage of the sources and the mostly vertical-component-only nature of the dataset, only long-period, volumetric components of the moment tensor spectra were well constrained. The source spectra, particularly their long-period levels and corner frequencies, could not be fit by traditional explosion source models. To achieve a better fit, I used a model with parameters derived from regressing observed values against source yield and depth. These values were calculated from measured source moments and corner frequencies. Although the number of data points used in the regression is small, the approach suggests a potential way to develop a source model for chemical explosions when more data with wider coverage of yield, depth of burial, and material property are collected. JF - Bulletin of the Seismological Society of America. Berkeley CA AU - Yang, Xiaoning AD - Los Alamos National Laboratory, EES-17, MS F665, Los Alamos, New Mexico 87545, xyang@lanl.gov Y1 - 2016/08/28/ PY - 2016 DA - 2016 Aug 28 SP - 1637 EP - 1651 PB - Seismological Society of America VL - 106 IS - 4 SN - 0037-1106, 0037-1106 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Green's function KW - Wave spectra KW - Yield KW - Physics KW - Inversion KW - Traveltime KW - Explosions KW - Inversions KW - Modelling KW - Q2 09270:Seismology KW - SW 0810:General KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1811901120?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America.+Berkeley+CA&rft.atitle=Source+Spectra+of+the+First+Four+Source+Physics+Experiments+%28SPE%29+Explosions+from+the+Frequency-Domain+Moment+Tensor+Inversion&rft.au=Yang%2C+Xiaoning&rft.aulast=Yang&rft.aufirst=Xiaoning&rft.date=2016-08-28&rft.volume=106&rft.issue=4&rft.spage=1637&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America.+Berkeley+CA&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150263 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Wave spectra; Green's function; Inversions; Explosions; Modelling; Physics; Inversion; Yield; Traveltime DO - http://dx.doi.org/10.1785/0120150263 ER - TY - JOUR T1 - Cation exchange synthesis of uniform PbSe/PbS core/shell tetra-pods and their use as near-infrared photodetectors. AN - 1806443049; 27387963 AB - In this work we explore the preparation of complex-shaped semiconductor nanostructures composed of different materials via a cationic exchange process in which the cations of the original semiconductor nanostructure are replaced by cations of different metals with preservation of the shape and the anionic framework of the nanocrystals. Utilizing this cation exchange method, we synthesized two new tetrapods for the first time: Cu2-xSe/Cu2-xS and PbSe/PbS, both prepared from CdSe/CdS tetrapods as 'templates'. We also fabricated near-infrared (NIR) photodetectors with a very simple architecture comprising a PbSe/PbS tetrapod layer between two Au electrodes on a glass substrate. When illuminated by a NIR laser, these devices are capable of achieving a responsivity of 11.9 A W(-1) without the use of ligand-exchange processes, thermal annealing or hybrid device architecture. Transient absorption spectroscopy was carried out on these PbSe/PbS tetrapods, the results of which suggest that the branched morphology contributes in part to device performance. Investigation of the charge dynamics of the PbSe/PbS tetrapods revealed an extremely long-lived exciton recombination lifetime of ∼17 ms, which can result in enhanced photoconductive gain. Overall, these heterostructured tetrapods showcase simultaneously the importance of nanoparticle shape, band structure, and surface chemistry in the attainment of NIR photodetection. JF - Nanoscale AU - Mishra, N AU - Mukherjee, B AU - Xing, G AU - Chakrabortty, S AU - Guchhait, A AU - Lim, J Y AD - Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543. Nimai@lanl.gov nimaiiitm@gmail.com. Y1 - 2016/08/07/ PY - 2016 DA - 2016 Aug 07 SP - 14203 EP - 14212 VL - 8 IS - 29 KW - Index Medicus UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1806443049?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nanoscale&rft.atitle=Cation+exchange+synthesis+of+uniform+PbSe%2FPbS+core%2Fshell+tetra-pods+and+their+use+as+near-infrared+photodetectors.&rft.au=Goderis%2C+S%3BBrandon%2C+A+D%3BMayer%2C+B%3BHumayun%2C+M%3BAnonymous&rft.aulast=Goderis&rft.aufirst=S&rft.date=2014-01-01&rft.volume=5&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=NIPR+Symposium+on+Polar+Science&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-07-21 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1039/c6nr02579j ER - TY - JOUR T1 - Integrated surface/subsurface permafrost thermal hydrology; model formulation and proof-of-concept simulations AN - 1855316248; 2017-001034 AB - The need to understand potential climate impacts and feedbacks in Arctic regions has prompted recent interest in modeling of permafrost dynamics in a warming climate. A new fine-scale integrated surface/subsurface thermal hydrology modeling capability is described and demonstrated in proof-of-concept simulations. The new modeling capability combines a surface energy balance model with recently developed three-dimensional subsurface thermal hydrology models and new models for nonisothermal surface water flows and snow distribution in the microtopography. Surface water flows are modeled using the diffusion wave equation extended to include energy transport and phase change of ponded water. Variation of snow depth in the microtopography, physically the result of wind scour, is modeled phenomenologically with a diffusion wave equation. The multiple surface and subsurface processes are implemented by leveraging highly parallel community software. Fully integrated thermal hydrology simulations on the tilted open book catchment, an important test case for integrated surface/subsurface flow modeling, are presented. Fine-scale 100 year projections of the integrated permafrost thermal hydrological system on an ice wedge polygon at Barrow Alaska in a warming climate are also presented. These simulations demonstrate the feasibility of microtopography-resolving, process-rich simulations as a tool to help understand possible future evolution of the carbon-rich Arctic tundra in a warming climate. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Painter, Scott L AU - Coon, Ethan T AU - Atchley, Adam L AU - Berndt, Markus AU - Garimella, Rao AU - Moulton, J David AU - Svyatskiy, Daniil AU - Wilson, Cathy J Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 6062 EP - 6077 PB - American Geophysical Union, Washington, DC VL - 52 IS - 8 SN - 0043-1397, 0043-1397 KW - United States KW - hydrology KW - cryosphere KW - permafrost KW - three-dimensional models KW - tundra KW - Arctic region KW - data processing KW - global change KW - thawing KW - climate change KW - Barrow Alaska KW - ground water KW - computer programs KW - digital simulation KW - Alaska KW - frozen ground KW - global warming KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855316248?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Integrated+surface%2Fsubsurface+permafrost+thermal+hydrology%3B+model+formulation+and+proof-of-concept+simulations&rft.au=Painter%2C+Scott+L%3BCoon%2C+Ethan+T%3BAtchley%2C+Adam+L%3BBerndt%2C+Markus%3BGarimella%2C+Rao%3BMoulton%2C+J+David%3BSvyatskiy%2C+Daniil%3BWilson%2C+Cathy+J&rft.aulast=Painter&rft.aufirst=Scott&rft.date=2016-08-01&rft.volume=52&rft.issue=8&rft.spage=6062&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR018427 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 63 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2017-01-05 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - Alaska; Arctic region; Barrow Alaska; climate change; computer programs; cryosphere; data processing; digital simulation; frozen ground; global change; global warming; ground water; hydrology; permafrost; thawing; three-dimensional models; tundra; United States DO - http://dx.doi.org/10.1002/2015WR018427 ER - TY - JOUR T1 - Fracture size and transmissivity correlations; implications for transport simulations in sparse three-dimensional discrete fracture networks following a truncated power law distribution of fracture size AN - 1855315953; 2017-001057 AB - We characterize how different fracture size-transmissivity relationships influence flow and transport simulations through sparse three-dimensional discrete fracture networks. Although it is generally accepted that there is a positive correlation between a fracture's size and its transmissivity/aperture, the functional form of that relationship remains a matter of debate. Relationships that assume perfect correlation, semicorrelation, and noncorrelation between the two have been proposed. To study the impact that adopting one of these relationships has on transport properties, we generate multiple sparse fracture networks composed of circular fractures whose radii follow a truncated power law distribution. The distribution of transmissivities are selected so that the mean transmissivity of the fracture networks are the same and the distributions of aperture and transmissivity in models that include a stochastic term are also the same. We observe that adopting a correlation between a fracture size and its transmissivity leads to earlier breakthrough times and higher effective permeability when compared to networks where no correlation is used. While fracture network geometry plays the principal role in determining where transport occurs within the network, the relationship between size and transmissivity controls the flow speed. These observations indicate DFN modelers should be aware that breakthrough times and effective permeabilities can be strongly influenced by such a relationship in addition to fracture and network statistics. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Hyman, J D AU - Aldrich, G AU - Viswanathan, H AU - Makedonska, N AU - Karra, S Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 6472 EP - 6489 PB - American Geophysical Union, Washington, DC VL - 52 IS - 8 SN - 0043-1397, 0043-1397 KW - power law KW - numerical models KW - three-dimensional models KW - density functional theory KW - data processing KW - correlation KW - preferential flow KW - statistical distribution KW - size KW - ground water KW - fractures KW - transmissivity KW - transport KW - stochastic processes KW - digital simulation KW - breakthrough curves KW - permeability KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855315953?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Fracture+size+and+transmissivity+correlations%3B+implications+for+transport+simulations+in+sparse+three-dimensional+discrete+fracture+networks+following+a+truncated+power+law+distribution+of+fracture+size&rft.au=Hyman%2C+J+D%3BAldrich%2C+G%3BViswanathan%2C+H%3BMakedonska%2C+N%3BKarra%2C+S&rft.aulast=Hyman&rft.aufirst=J&rft.date=2016-08-01&rft.volume=52&rft.issue=8&rft.spage=6472&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2016WR018806 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 80 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2017-01-05 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - breakthrough curves; correlation; data processing; density functional theory; digital simulation; fractures; ground water; numerical models; permeability; power law; preferential flow; size; statistical distribution; stochastic processes; three-dimensional models; transmissivity; transport DO - http://dx.doi.org/10.1002/2016WR018806 ER - TY - JOUR T1 - Sanctions as a nonproliferation tool: Lessons from Libya AN - 1835735387 AB - Libya's nuclear program provides a relatively straightforward "closed case" that allows us to analyze the contribution of economic and diplomatic sanctions to nonproliferation efforts. While Libya endured substantial economic difficulties during the period when sanctions were in place, sanctions served mostly as a magnifier for these problems, rather than as a primary cause. However, we find that sanctions can be an effective nonproliferation tool when they: have multilateral support, exploit specific weaknesses in the target state's economy, take advantage of political shifts and divisions in the target state, and are used in combination with other tools. JF - Comparative Strategy AU - Barnum, Miriam AU - Fearey, Bryan L AD - National Security Office, The Los Alamos National Laboratory, Los Alamos, NM, USA ; National Security Office, The Los Alamos National Laboratory, Los Alamos, NM, USA Y1 - 2016/08// PY - 2016 DA - Aug 2016 SP - 234 EP - 245 CY - New York PB - Taylor & Francis Ltd. VL - 35 IS - 4 SN - 0149-5933 KW - Political Science KW - Sanctions KW - Multilateralism KW - Nuclear Proliferation KW - Libya KW - 9063:international relations; international relations KW - 9141:political economy; political economy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1835735387?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awpsa&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+chemical+biology&rft.atitle=Chemical+inhibition+of+prometastatic+lysyl-tRNA+synthetase-laminin+receptor+interaction.&rft.au=Kim%2C+Dae+Gyu%3BLee%2C+Jin+Young%3BKwon%2C+Nam+Hoon%3BFang%2C+Pengfei%3BZhang%2C+Qian%3BWang%2C+Jing%3BYoung%2C+Nicolas+L%3BGuo%2C+Min%3BCho%2C+Hye+Young%3BMushtaq%2C+Ameeq+Ul%3BJeon%2C+Young+Ho%3BChoi%2C+Jin+Woo%3BHan%2C+Jung+Min%3BKang%2C+Ho+Woong%3BJoo%2C+Jae+Eun%3BHur%2C+Youn%3BKang%2C+Wonyoung%3BYang%2C+Heekyoung%3BNam%2C+Do-Hyun%3BLee%2C+Mi-Sook%3BLee%2C+Jung+Weon%3BKim%2C+Eun-Sook%3BMoon%2C+Aree%3BKim%2C+Kibom%3BKim%2C+Doyeun%3BKang%2C+Eun+Joo%3BMoon%2C+Youngji%3BRhee%2C+Kyung+Hee%3BHan%2C+Byung+Woo%3BYang%2C+Jee+Sun%3BHan%2C+Gyoonhee%3BYang%2C+Won+Suk%3BLee%2C+Cheolju%3BWang%2C+Ming-Wei%3BKim%2C+Sunghoon&rft.aulast=Kim&rft.aufirst=Dae&rft.date=2014-01-01&rft.volume=10&rft.issue=1&rft.spage=29&rft.isbn=&rft.btitle=&rft.title=Nature+chemical+biology&rft.issn=1552-4469&rft_id=info:doi/10.1038%2Fnchembio.1381 LA - English DB - PAIS Index; Worldwide Political Science Abstracts N1 - Copyright - © 2016 The Los Alamos National Laboratory N1 - Last updated - 2016-12-05 N1 - SubjectsTermNotLitGenreText - Libya DO - http://dx.doi.org/10.1080/01495933.2016.1222830 ER - TY - JOUR T1 - Book Review [ Source Mechanisms of Earthquakes: Theory and Practice by Agustin Udias, Raul Madariaga and Elisa Buforn, Cambridge University Press, 2014; ISBN: 978-1-107-04027-4 (hardback), USD 84.99] AN - 1832648590; 782318-26 JF - Pure and Applied Geophysics AU - Chen, Yu Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 2971 EP - 2972 PB - Birkhaeuser, Basel VL - 173 IS - 8 SN - 0033-4553, 0033-4553 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832648590?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Pure+and+Applied+Geophysics&rft.atitle=Book+Review+%5B+Source+Mechanisms+of+Earthquakes%3A+Theory+and+Practice+by+Agustin+Udias%2C+Raul+Madariaga+and+Elisa+Buforn%2C+Cambridge+University+Press%2C+2014%3B+ISBN%3A+978-1-107-04027-4+%28hardback%29%2C+USD+84.99%5D&rft.au=Chen%2C+Yu&rft.aulast=Chen&rft.aufirst=Yu&rft.date=2016-08-01&rft.volume=173&rft.issue=8&rft.spage=2971&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-016-1361-5 L2 - http://link.springer.de/link/service/journals/00024/index.htm LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1007/s00024-016-1361-5 ER - TY - JOUR T1 - New preconditioning strategy for Jacobian-free solvers for variably saturated flows with Richards' equation AN - 1832646299; 782152-2 AB - We develop a new approach for solving the nonlinear Richards' equation arising in variably saturated flow modeling. The growing complexity of geometric models for simulation of subsurface flows leads to the necessity of using unstructured meshes and advanced discretization methods. Typically, a numerical solution is obtained by first discretizing PDEs and then solving the resulting system of nonlinear discrete equations with a Newton-Raphson-type method. Efficiency and robustness of the existing solvers rely on many factors, including an empiric quality control of intermediate iterates, complexity of the employed discretization method and a customized preconditioner. We propose and analyze a new preconditioning strategy that is based on a stable discretization of the continuum Jacobian. We will show with numerical experiments for challenging problems in subsurface hydrology that this new preconditioner improves convergence of the existing Jacobian-free solvers 3-20 times. We also show that the Picard method with this preconditioner becomes a more efficient nonlinear solver than a few widely used Jacobian-free solvers. JF - Advances in Water Resources AU - Lipnikov, Konstantin AU - Moulton, David AU - Svyatskiy, Daniil Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 11 EP - 22 PB - Elsevier, Oxford VL - 94 SN - 0309-1708, 0309-1708 KW - models KW - hydrology KW - saturation KW - Richards equation KW - fluid flow KW - Picard methods KW - simulation KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832646299?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=New+preconditioning+strategy+for+Jacobian-free+solvers+for+variably+saturated+flows+with+Richards%27+equation&rft.au=Lipnikov%2C+Konstantin%3BMoulton%2C+David%3BSvyatskiy%2C+Daniil&rft.aulast=Lipnikov&rft.aufirst=Konstantin&rft.date=2016-08-01&rft.volume=94&rft.issue=&rft.spage=11&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2016.04.016 L2 - http://www.sciencedirect.com/science/journal/03091708 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Number of references - 40 N1 - Document feature - illus. incl. 12 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - fluid flow; hydrology; models; Picard methods; Richards equation; saturation; simulation DO - http://dx.doi.org/10.1016/j.advwatres.2016.04.016 ER - TY - JOUR T1 - Source spectra of the first four source physics experiments (SPE) explosions from the frequency-domain moment tensor inversion AN - 1824213709; 2016-085231 AB - I used seismic waveforms recorded within 2 km from the epicenter of the first four Source Physics Experiments (SPE) explosions to invert for the moment tensor spectra of these explosions. I employed a 1D Earth model for Green's function calculations. The model was developed from P- and Rg-wave travel times and amplitudes. I selected data for the inversion based on the criterion that they had consistent travel times and amplitude behavior as those predicted by the 1D model. Because of limited azimuthal coverage of the sources and the mostly vertical-component-only nature of the dataset, only long-period, volumetric components of the moment tensor spectra were well constrained. The source spectra, particularly their long-period levels and corner frequencies, could not be fit by traditional explosion source models. To achieve a better fit, I used a model with parameters derived from regressing observed values against source yield and depth. These values were calculated from measured source moments and corner frequencies. Although the number of data points used in the regression is small, the approach suggests a potential way to develop a source model for chemical explosions when more data with wider coverage of yield, depth of burial, and material property are collected. JF - Bulletin of the Seismological Society of America AU - Yang, Xiaoning Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 1647 EP - 1651 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 4 SN - 0037-1106, 0037-1106 KW - United States KW - seismograms KW - technology KW - explosions KW - chemical explosions KW - Green function KW - elastic waves KW - seismic sources KW - information management KW - depth KW - data management KW - models KW - Nevada Test Site KW - moment tensors KW - spectra KW - algorithms KW - Nevada KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213709?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Source+spectra+of+the+first+four+source+physics+experiments+%28SPE%29+explosions+from+the+frequency-domain+moment+tensor+inversion&rft.au=Yang%2C+Xiaoning&rft.aulast=Yang&rft.aufirst=Xiaoning&rft.date=2016-08-01&rft.volume=106&rft.issue=4&rft.spage=1647&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150263 L2 - http://bssa.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 33 N1 - PubXState - CA N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2016-09-29 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; amplitude; chemical explosions; data management; depth; elastic waves; explosions; Green function; information management; models; moment tensors; Nevada; Nevada Test Site; seismic sources; seismograms; spectra; technology; United States DO - http://dx.doi.org/10.1785/0120150263 ER - TY - JOUR T1 - Evaluating the effect of internal aperture variability on transport in kilometer scale discrete fracture networks AN - 1811888497; PQ0003497737 AB - The apertures of natural fractures in fractured rock are highly heterogeneous. However, in-fracture aperture variability is often neglected in flow and transport modeling and individual fractures are assumed to have uniform aperture distribution. The relative importance of in-fracture variability in flow and transport modeling within kilometer-scale field-scale fracture networks has been under a matter of debate for a long time because the flow in each single fracture is controlled not only by in-fracture variability but also by boundary conditions. Computational limitations have previously prohibited researchers from investigating the relative importance of in-fracture variability in flow and transport modeling within large-scale fracture networks. We address this question by incorporating internal heterogeneity of individual fractures into flow simulations within kilometer scale three-dimensional fracture networks, where fracture intensity, P32 (ratio between total fracture area and domain volume) is between 0.027 and 0.031 [1/m]. A recently developed discrete fracture network (DFN) simulation capability, dfnWorks, is used to generate DFNs that include in-fracture aperture variability represented by a stationary log-normal stochastic field with various correlation lengths and variances. The Lagrangian transport parameters, non-reacting travel time and cumulative retention, are calculated along particles streamlines. It is observed that due to local flow channeling early particle travel times are more sensitive to in-fracture variability than the tails of travel time distributions, where no significant effect of the in-fracture transmissivity variations and spatial correlation length is observed. JF - Advances in Water Resources AU - Makedonska, Nataliia AU - Hyman, Jeffrey D AU - Karra, Satish AU - Painter, Scott L AU - Gable, Carl W AU - Viswanathan, Hari S AD - Computational Earth Science Group, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 486 EP - 497 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 94 SN - 0309-1708, 0309-1708 KW - Environment Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Meteorological & Geoastrophysical Abstracts KW - Discrete fracture networks KW - Subsurface flow and transport KW - Heterogeneity KW - Advective transport KW - Aperture variability KW - High-performance computing KW - Fractured rock KW - Flow KW - Variability KW - Ecological distribution KW - Correlations KW - Water resources KW - Particulates KW - Boundary conditions KW - Geologic Fractures KW - Streamlines KW - Simulation Analysis KW - Boundary Conditions KW - Fractures KW - Simulation KW - Traveltime KW - Rocks KW - Numerical simulations KW - Water Resources KW - AQ 00001:Water Resources and Supplies KW - Q2 09127:General papers on resources KW - SW 0810:General KW - M2 551.5:General (551.5) KW - ENA 16:Renewable Resources-Water UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1811888497?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Evaluating+the+effect+of+internal+aperture+variability+on+transport+in+kilometer+scale+discrete+fracture+networks&rft.au=Makedonska%2C+Nataliia%3BHyman%2C+Jeffrey+D%3BKarra%2C+Satish%3BPainter%2C+Scott+L%3BGable%2C+Carl+W%3BViswanathan%2C+Hari+S&rft.aulast=Makedonska&rft.aufirst=Nataliia&rft.date=2016-08-01&rft.volume=94&rft.issue=&rft.spage=486&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2016.06.010 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Number of references - 53 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Streamlines; Ecological distribution; Fractures; Water resources; Numerical simulations; Correlations; Boundary conditions; Simulation; Particulates; Flow; Geologic Fractures; Variability; Rocks; Boundary Conditions; Simulation Analysis; Heterogeneity; Traveltime; Water Resources DO - http://dx.doi.org/10.1016/j.advwatres.2016.06.010 ER - TY - JOUR T1 - Oxidation of manganese in an ancient aquifer, Kimberley Formation, Gale Crater, Mars AN - 1859792271; 2017-004562 AB - The Curiosity rover observed high Mn abundances (>25 wt % MnO) in fracture-filling materials that crosscut sandstones in the Kimberley region of Gale crater, Mars. The correlation between Mn and trace metal abundances plus the lack of correlation between Mn and elements such as S, Cl, and C, reveals that these deposits are Mn oxides rather than evaporites or other salts. On Earth, environments that concentrate Mn and deposit Mn minerals require water and highly oxidizing conditions; hence, these findings suggest that similar processes occurred on Mars. Based on the strong association between Mn-oxide deposition and evolving atmospheric dioxygen levels on Earth, the presence of these Mn phases on Mars suggests that there was more abundant molecular oxygen within the atmosphere and some groundwaters of ancient Mars than in the present day. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Lanza, Nina L AU - Wiens, Roger C AU - Arvidson, Raymond E AU - Clark, Benton C AU - Fischer, Woodward W AU - Gellert, Ralf AU - Grotzinger, John P AU - Hurowitz, Joel A AU - McLennan, Scott M AU - Morris, Richard V AU - Rice, Melissa S AU - Bell, James F, III AU - Berger, Jeffrey A AU - Blaney, Diana L AU - Bridges, Nathan T AU - Calef, Fred, III AU - Campbell, John L AU - Clegg, Samuel M AU - Cousin, Agnes AU - Edgett, Kenneth S AU - Fabre, Cecile AU - Fisk, Martin R AU - Forni, Olivier AU - Frydenvang, Jens AU - Hardy, Keian R AU - Hardgrove, Craig AU - Johnson, Jeffrey R AU - Lasue, Jeremie AU - Le Mouelic, Stephane AU - Malin, Michael C AU - Mangold, Nicolas AU - Martin-Torres, Javier AU - Maurice, Sylvestre AU - McBride, Marie J AU - Ming, Douglas W AU - Newsom, Horton E AU - Ollila, Ann M AU - Sautter, Violaine AU - Schroeder, Susanne AU - Thompson, Lucy M AU - Treiman, Allan H AU - VanBommel, Scott AU - Vaniman, David T AU - Zorzano, Maria-Paz Y1 - 2016/07/28/ PY - 2016 DA - 2016 Jul 28 SP - 7398 EP - 7407 PB - American Geophysical Union, Washington, DC VL - 43 IS - 14 SN - 0094-8276, 0094-8276 KW - fractured materials KW - oxygen KW - enrichment KW - alpha particles KW - Mars KW - manganese KW - ground water KW - Gale Crater KW - major elements KW - Curiosity Rover KW - manganese oxides KW - oxides KW - interplanetary comparison KW - ChemCam KW - spectra KW - chemical composition KW - geochemistry KW - concentration KW - Earth KW - Mount Remarkable Member KW - paleoatmosphere KW - oxidation KW - cosmochemistry KW - Kimberley Formation KW - X-ray spectra KW - aquifers KW - terrestrial planets KW - planets KW - paleoenvironment KW - extraterrestrial geology KW - metals KW - Mars Science Laboratory KW - terrestrial comparison KW - trace metals KW - Dillinger Member KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859792271?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Oxidation+of+manganese+in+an+ancient+aquifer%2C+Kimberley+Formation%2C+Gale+Crater%2C+Mars&rft.au=Lanza%2C+Nina+L%3BWiens%2C+Roger+C%3BArvidson%2C+Raymond+E%3BClark%2C+Benton+C%3BFischer%2C+Woodward+W%3BGellert%2C+Ralf%3BGrotzinger%2C+John+P%3BHurowitz%2C+Joel+A%3BMcLennan%2C+Scott+M%3BMorris%2C+Richard+V%3BRice%2C+Melissa+S%3BBell%2C+James+F%2C+III%3BBerger%2C+Jeffrey+A%3BBlaney%2C+Diana+L%3BBridges%2C+Nathan+T%3BCalef%2C+Fred%2C+III%3BCampbell%2C+John+L%3BClegg%2C+Samuel+M%3BCousin%2C+Agnes%3BEdgett%2C+Kenneth+S%3BFabre%2C+Cecile%3BFisk%2C+Martin+R%3BForni%2C+Olivier%3BFrydenvang%2C+Jens%3BHardy%2C+Keian+R%3BHardgrove%2C+Craig%3BJohnson%2C+Jeffrey+R%3BLasue%2C+Jeremie%3BLe+Mouelic%2C+Stephane%3BMalin%2C+Michael+C%3BMangold%2C+Nicolas%3BMartin-Torres%2C+Javier%3BMaurice%2C+Sylvestre%3BMcBride%2C+Marie+J%3BMing%2C+Douglas+W%3BNewsom%2C+Horton+E%3BOllila%2C+Ann+M%3BSautter%2C+Violaine%3BSchroeder%2C+Susanne%3BThompson%2C+Lucy+M%3BTreiman%2C+Allan+H%3BVanBommel%2C+Scott%3BVaniman%2C+David+T%3BZorzano%2C+Maria-Paz&rft.aulast=Lanza&rft.aufirst=Nina&rft.date=2016-07-28&rft.volume=43&rft.issue=14&rft.spage=7398&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2016GL069109 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 50 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-01-19 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - alpha particles; aquifers; ChemCam; chemical composition; concentration; cosmochemistry; Curiosity Rover; Dillinger Member; Earth; enrichment; extraterrestrial geology; fractured materials; Gale Crater; geochemistry; ground water; interplanetary comparison; Kimberley Formation; major elements; manganese; manganese oxides; Mars; Mars Science Laboratory; metals; Mount Remarkable Member; oxidation; oxides; oxygen; paleoatmosphere; paleoenvironment; planets; spectra; terrestrial comparison; terrestrial planets; trace metals; X-ray spectra DO - http://dx.doi.org/10.1002/2016GL069109 ER - TY - GEN T1 - The Next Generation Of Solar Panels AN - 1803956572 JF - Breaking Energy AU - Nancy Ambrosiano | Los Alamos National Laboratory Y1 - 2016/07/14/ PY - 2016 DA - 2016 Jul 14 CY - New York PB - SyndiGate Media Inc KW - Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803956572?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aabitrade&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=Breaking+Energy&rft.atitle=The+Next+Generation+Of+Solar+Panels&rft.au=Nancy+Ambrosiano+%3B+Los+Alamos+National+Laboratory&rft.aulast=Nancy+Ambrosiano+%7C+Los+Alamos+National+Laboratory&rft.aufirst=&rft.date=2016-07-14&rft.volume=60&rft.issue=220&rft.spage=361&rft.isbn=&rft.btitle=&rft.title=Journal+of+Glaciology&rft.issn=00221430&rft_id=info:doi/10.3189%2F2014JoG13J095 LA - English DB - ProQuest Central N1 - Copyright - Copyright © 2016 Breaking Media, Inc. All rights reserved. Provided by SyndiGate Media Inc. (Syndigate.info). N1 - Last updated - 2016-07-15 ER - TY - JOUR T1 - Limitations of One-Dimensional Mesoscale PBL Parameterizations in Reproducing Mountain-Wave Flows AN - 1846409498; PQ0003820176 AB - Mesoscale models are considered to be the state of the art in modeling mountain-wave flows. Herein, the authors investigate the role and accuracy of planetary boundary layer (PBL) parameterizations in handling the interaction between large-scale mountain waves and the atmospheric boundary layer. To that end, recent large-eddy simulation (LES) results of mountain waves over a symmetric two-dimensional bell-shaped hill are used and compared to four commonly used PBL schemes. It is found that one-dimensional PBL parameterizations produce reasonable agreement with the LES results in terms of vertical wavelength, amplitude of velocity, and turbulent kinetic energy distribution in the downhill shooting-flow region. However, the assumption of horizontal homogeneity in PBL parameterizations does not hold in the context of these complex flow configurations. This inappropriate modeling assumption results in a vertical wavelength shift, producing errors of approximately 10 m s super(-1) at downstream locations because of the presence of a coherent trapped lee wave that does not mix with the atmospheric boundary layer. In contrast, horizontally integrated momentum flux derived from these PBL schemes displays a realistic pattern. Therefore, results from mesoscale models using ensembles of one-dimensional PBL schemes can still potentially be used to parameterize drag effects in general circulation models. Nonetheless, three-dimensional PBL schemes must be developed in order for mesoscale models to accurately represent complex terrain and other types of flows where one-dimensional PBL assumptions are violated. JF - Journal of the Atmospheric Sciences AU - Munoz-Esparza, Domingo AU - Sauer, Jeremy A AU - Linn, Rodman R AU - Kosovic, Branko AD - Los Alamos National Laboratory, Los Alamos, New Mexico Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 2603 EP - 2614 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 73 IS - 7 SN - 0022-4928, 0022-4928 KW - Water Resources Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Flow KW - Mountain waves KW - Atmospheric sciences KW - Turbulent kinetic energy KW - Handling KW - Boundary Layers KW - Lee waves KW - Wave amplitude KW - Kinetic Energy KW - Mountains KW - Waves KW - Downstream KW - Atmospheric boundary layer KW - Wave velocity KW - Modelling KW - Homogeneity KW - Atmospheric circulation KW - Large eddy simulations KW - Wavelengths KW - Drag KW - General circulation models KW - Mesoscale models KW - Momentum flux KW - Fluctuations KW - Momentum transfer KW - O 5080:Legal/Governmental KW - SW 0810:General KW - Q2 09244:Air-sea coupling KW - M2 551.509.1/.5:Forecasting (551.509.1/.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846409498?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+Atmospheric+Sciences&rft.atitle=Limitations+of+One-Dimensional+Mesoscale+PBL+Parameterizations+in+Reproducing+Mountain-Wave+Flows&rft.au=Munoz-Esparza%2C+Domingo%3BSauer%2C+Jeremy+A%3BLinn%2C+Rodman+R%3BKosovic%2C+Branko&rft.aulast=Munoz-Esparza&rft.aufirst=Domingo&rft.date=2016-07-01&rft.volume=73&rft.issue=7&rft.spage=2603&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+Atmospheric+Sciences&rft.issn=00224928&rft_id=info:doi/10.1175%2FJAS-D-15-0304.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Number of references - 39 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Atmospheric sciences; Handling; Atmospheric circulation; Atmospheric boundary layer; Wave velocity; Momentum transfer; Wave amplitude; Lee waves; Modelling; Mountain waves; Turbulent kinetic energy; General circulation models; Mesoscale models; Momentum flux; Large eddy simulations; Drag; Homogeneity; Mountains; Flow; Boundary Layers; Downstream; Waves; Fluctuations; Kinetic Energy; Wavelengths DO - http://dx.doi.org/10.1175/JAS-D-15-0304.1 ER - TY - JOUR T1 - A Large-Eddy Simulation Study of Atmospheric Boundary Layer Influence on Stratified Flows over Terrain AN - 1846405482; PQ0003820175 AB - The impact of atmospheric boundary layer (ABL) interactions with large-scale stably stratified flow over an isolated, two-dimensional hill is investigated using turbulence-resolving large-eddy simulations. The onset of internal gravity wave breaking and leeside flow response regimes of trapped lee waves and nonlinear breakdown (or hydraulic-jump-like state) as they depend on the classical inverse Froude number, Fr super(-1) = Nh/U sub(g), is explored in detail. Here, N is the Brunt-Vaeisaelae frequency, h is the hill height, and U sub(g) is the geostrophic wind. The results here demonstrate that the presence of a turbulent ABL influences mountain wave (MW) development in critical aspects, such as dissipation of trapped lee waves and amplified stagnation zone turbulence through Kelvin-Helmholtz instability. It is shown that the nature of interactions between the large-scale flow and the ABL is better characterized by a proposed inverse compensated Froude number, = N(h - z sub(i))/U sub(g), where z sub(i) is the ABL height. In addition, it is found that the onset of the nonlinear-breakdown regime, approximately 1.0, is initiated when the vertical wavelength becomes comparable to the sufficiently energetic scales of turbulence in the stagnation zone and ABL, yielding an abrupt change in leeside flow response. Finally, energy spectra are presented in the context of MW flows, supporting the existence of a clear transition in leeside flow response, and illustrating two distinct energy distribution states for the trapped-lee-wave and the nonlinear-breakdown regimes. JF - Journal of the Atmospheric Sciences AU - Sauer, Jeremy A AU - Munoz-Esparza, Domingo AU - Canfield, Jesse M AU - Costigan, Keeley R AU - Linn, Rodman R AU - Kim, Young-Joon AD - Computer, Computational, and Statistical Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 2615 EP - 2632 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 73 IS - 7 SN - 0022-4928, 0022-4928 KW - Water Resources Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Flow KW - Kelvin-helmholtz instability KW - Hydrological Regime KW - Mountain waves KW - Atmospheric sciences KW - Boundary Layers KW - Brunt-Vaeisaelae frequency KW - turbulence KW - Internal gravity waves KW - Lee waves KW - Waves KW - Atmospheric boundary layer KW - Marine KW - Simulation Analysis KW - Energy spectra KW - Kelvin-Helmholtz instability KW - Oceanic eddies KW - Large eddy simulations KW - Stratified Flow KW - Geostrophic winds KW - Energy KW - Stratified flow KW - Froude number KW - Froude Number KW - M2 551.551:Atmospheric Turbulence/Variations (551.551) KW - SW 0810:General KW - O 6030:Oil and Gas Resources KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846405482?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+Atmospheric+Sciences&rft.atitle=A+Large-Eddy+Simulation+Study+of+Atmospheric+Boundary+Layer+Influence+on+Stratified+Flows+over+Terrain&rft.au=Sauer%2C+Jeremy+A%3BMunoz-Esparza%2C+Domingo%3BCanfield%2C+Jesse+M%3BCostigan%2C+Keeley+R%3BLinn%2C+Rodman+R%3BKim%2C+Young-Joon&rft.aulast=Sauer&rft.aufirst=Jeremy&rft.date=2016-07-01&rft.volume=73&rft.issue=7&rft.spage=2615&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+Atmospheric+Sciences&rft.issn=00224928&rft_id=info:doi/10.1175%2FJAS-D-15-0282.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Number of references - 46 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Kelvin-helmholtz instability; Atmospheric sciences; Energy spectra; Oceanic eddies; Froude number; Atmospheric boundary layer; Stratified flow; Lee waves; Geostrophic winds; Mountain waves; Brunt-Vaeisaelae frequency; Kelvin-Helmholtz instability; Large eddy simulations; Internal gravity waves; Flow; Hydrological Regime; Simulation Analysis; Energy; Boundary Layers; Waves; Froude Number; turbulence; Stratified Flow; Marine DO - http://dx.doi.org/10.1175/JAS-D-15-0282.1 ER - TY - JOUR T1 - Where Does Water Go During Hydraulic Fracturing? AN - 1846400855; PQ0003820643 AB - During hydraulic fracturing millions of gallons of water are typically injected at high pressure into deep shale formations. This water can be housed in fractures, within the shale matrix, and can potentially migrate beyond the shale formation via fractures and/or faults raising environmental concerns. We describe a generic framework for producing estimates of the volume available in fractures and undamaged shale matrix where water injected into a representative shale site could reside during hydraulic fracturing, and apply it to a representative site that incorporates available field data. The amount of water that can be stored in the fractures is estimated by calculating the volume of all the fractures associated with a discrete fracture network (DFN) based on real data and using probability theory to estimate the volume of smaller fractures that are below the lower cutoff for the fracture radius in the DFN. The amount of water stored in the matrix is estimated utilizing two distinct methods-one using a two-phase model at the pore-scale and the other using a single-phase model at the continuum scale. Based on these calculations, it appears that most of the water resides in the matrix with a lesser amount in the fractures. JF - Ground Water AU - O'Malley, D AU - Karra, S AU - Currier, R P AU - Makedonska, N AU - Hyman, J D AU - Viswanathan, H S AD - Computational Earth Science, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545. Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 488 EP - 497 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 54 IS - 4 SN - 0017-467X, 0017-467X KW - Environment Abstracts; Water Resources Abstracts; Aqualine Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Geologic Fractures KW - Hydraulics KW - Cutoffs KW - Fractures KW - Hydraulic Fracturing KW - Environmental perception KW - Shales KW - Probability theory KW - High Pressure KW - Groundwater KW - Modelling KW - AQ 00001:Water Resources and Supplies KW - Q5 08503:Characteristics, behavior and fate KW - Q2 09144:Regional studies, expeditions and data reports KW - SW 6050:Rock mechanics and geology KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846400855?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ground+Water&rft.atitle=Where+Does+Water+Go+During+Hydraulic+Fracturing%3F&rft.au=O%27Malley%2C+D%3BKarra%2C+S%3BCurrier%2C+R+P%3BMakedonska%2C+N%3BHyman%2C+J+D%3BViswanathan%2C+H+S&rft.aulast=O%27Malley&rft.aufirst=D&rft.date=2016-07-01&rft.volume=54&rft.issue=4&rft.spage=488&rft.isbn=&rft.btitle=&rft.title=Ground+Water&rft.issn=0017467X&rft_id=info:doi/10.1111%2Fgwat.12380 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Probability theory; Fractures; Modelling; Hydraulics; Groundwater; Environmental perception; Geologic Fractures; Shales; Cutoffs; High Pressure; Hydraulic Fracturing DO - http://dx.doi.org/10.1111/gwat.12380 ER - TY - JOUR T1 - A synthesis of the basal thermal state of the Greenland ice sheet AN - 1840614688; 2016-093991 AB - The basal thermal state of an ice sheet (frozen or thawed) is an important control upon its evolution, dynamics, and response to external forcings. However, this state can only be observed directly at sparse boreholes or inferred conclusively from the presence of subglacial lakes. Here we synthesize spatially extensive inferences of the basal thermal state of the Greenland Ice Sheet to better constrain this state. Existing inferences include outputs from the eight thermomechanical ice-flow models included in the Sea Level Response to Ice Sheet Evolution (SeaRISE) effort. New remote-sensing inferences of the basal thermal state are derived from Holocene radiostratigraphy, modern surface velocity, and Moderate Resolution Imaging Spectroradiometer (MODIS) imagery. Both thermomechanical modeling and remote inferences generally agree that the Northeast Greenland Ice Stream and large portions of the southwestern ice-drainage systems are thawed at the bed, whereas the bed beneath the central ice divides, particularly their west facing slopes, is frozen. Elsewhere, there is poorer agreement regarding the basal thermal state. Both models and remote inferences rarely represent the borehole-observed basal thermal state accurately near NorthGRIP and DYE-3. This synthesis identifies a large portion of the Greenland Ice Sheet (about one third by area), where additional observations would most improve knowledge of its overall basal thermal state. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Earth Surface AU - MacGregor, Joseph A AU - Fahnestock, Mark A AU - Catania, Ginny A AU - Aschwanden, Andy AU - Clow, Gary D AU - Colgan, William T AU - Gogineni, S Prasad AU - Morlighem, Mathieu AU - Nowicki, Sophie M J AU - Paden, John D AU - Price, Stephen F AU - Seroussi, Helene Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 1328 EP - 1350 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 7 SN - 2169-9003, 2169-9003 KW - imagery KW - Quaternary KW - Arctic region KW - drainage KW - lakes KW - Greenland ice sheet KW - plastic flow KW - glacial features KW - thermal regime KW - Holocene KW - ice sheets KW - Cenozoic KW - Greenland KW - sea-level changes KW - boreholes KW - stratification KW - radiometers KW - ice KW - streams KW - glacial geology KW - subglacial lakes KW - remote sensing KW - MODIS KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840614688?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.atitle=A+synthesis+of+the+basal+thermal+state+of+the+Greenland+ice+sheet&rft.au=MacGregor%2C+Joseph+A%3BFahnestock%2C+Mark+A%3BCatania%2C+Ginny+A%3BAschwanden%2C+Andy%3BClow%2C+Gary+D%3BColgan%2C+William+T%3BGogineni%2C+S+Prasad%3BMorlighem%2C+Mathieu%3BNowicki%2C+Sophie+M+J%3BPaden%2C+John+D%3BPrice%2C+Stephen+F%3BSeroussi%2C+Helene&rft.aulast=MacGregor&rft.aufirst=Joseph&rft.date=2016-07-01&rft.volume=121&rft.issue=7&rft.spage=1328&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.issn=21699003&rft_id=info:doi/10.1002%2F2015JF003803 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9011/issues?year=2013 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 97 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - Arctic region; boreholes; Cenozoic; drainage; glacial features; glacial geology; Greenland; Greenland ice sheet; Holocene; ice; ice sheets; imagery; lakes; MODIS; plastic flow; Quaternary; radiometers; remote sensing; sea-level changes; stratification; streams; subglacial lakes; thermal regime DO - http://dx.doi.org/10.1002/2015JF003803 ER - TY - JOUR T1 - Constraints on iron sulfate and iron oxide mineralogy from ChemCam visible/near-infrared reflectance spectroscopy of Mt. Sharp basal units, Gale Crater, Mars AN - 1819896462; 2016-079213 AB - Relative reflectace point spectra (400-840 nm) were acquired by the Chemistry and Camera (ChemCam) instrument on the Mars Science Laboratory (MSL) rover Curiosity in passive mode (no laser) of drill tailings and broken rock fragments near the rover as it entered the lower reaches of Mt. Sharp and of landforms at distances of 2-8 km. Freshly disturbed surfaces are less subject to the spectral masking effects of dust, and revealed spectral features consistent with the presence of iron oxides and ferric sulfates. We present the first detection on Mars of a approximately 433 nm absorption band consistent with small abundances of ferric sulfates, corroborated by jarosite detections by the Chemistry and Mineralogy (CheMin) X-ray diffraction instrument in the Mojave, Telegraph Peak, and Confidence Hills drilled samples. Disturbed materials near the Bonanza King region also exhibited strong 433 nm bands and negative near-infrared spectral slopes consistent with jarosite. ChemCam passive spectra of the Confidence Hills and Mojave drill tailings showed features suggestive of the crystalline hematite identified by CheMin analyses. The Windjana drill sample tailings exhibited flat, low relative reflectance spectra, explained by the occurrence of magnetite detected by CheMin. Passive spectra of Bonanza King were similar, suggesting the presence of spectrally dark and neutral minerals such as magnetite. Long-distance spectra of the "Hematite Ridge" feature (3-5 km from the rover) exhibited features consistent with crystalline hematite. The Bagnold dune field north of the Hematite Ridge area exhibited low relative reflectance and near-infrared features indicative of basaltic materials (olivine, pyroxene). Light-toned layers south of Hematite Ridge lacked distinct spectral features in the 400-840 nm region, and may represent portions of nearby clay minerals and sulfates mapped with orbital near-infrared observations. The presence of ferric sulfates such as jarosite in the drill tailings suggests a relatively acidic environment, likely associated with flow of iron-bearing fluids, associated oxidation, and/or hydrothermal leaching of sedimentary rocks. Combined with other remote sensing data sets, mineralogical constraints from ChemCam passive spectra will continue to play an important role in interpreting the mineralogy and composition of materials encountered as Curiosity traverses further south within the basal layers of the Mt. Sharp complex. JF - American Mineralogist AU - Johnson, Jeffrey R AU - Bell, James F, III AU - Bender, Steve AU - Blaney, Diana AU - Cloutis, Edward AU - Ehlmann, Bethany L AU - Fraeman, Abigail AU - Gasnault, Olivier AU - Kinch, Kjartan AU - Le Mouelic, Stephane AU - Maurice, Sylvestre AU - Rampe, Elizabeth AU - Vaniman, David AU - Wiens, Roger C Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 1501 EP - 1514 PB - Mineralogical Society of America, Washington, DC VL - 101 IS - 7 SN - 0003-004X, 0003-004X KW - silicates KW - near-infrared spectra KW - volcanic rocks KW - iron oxides KW - igneous rocks KW - optical spectra KW - olivine group KW - Mars KW - landing sites KW - Gale Crater KW - infrared spectroscopy KW - pyroxene group KW - hematite KW - olivine KW - Curiosity Rover KW - basalts KW - orthosilicates KW - oxides KW - ChemCam KW - spectra KW - drilling KW - chain silicates KW - sulfates KW - iron sulfates KW - terrestrial planets KW - nesosilicates KW - planets KW - identification KW - Mars Science Laboratory KW - spectroscopy KW - reflectance KW - Mount Sharp KW - remote sensing KW - magnetite KW - 04:Extraterrestrial geology KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819896462?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Mineralogist&rft.atitle=Constraints+on+iron+sulfate+and+iron+oxide+mineralogy+from+ChemCam+visible%2Fnear-infrared+reflectance+spectroscopy+of+Mt.+Sharp+basal+units%2C+Gale+Crater%2C+Mars&rft.au=Johnson%2C+Jeffrey+R%3BBell%2C+James+F%2C+III%3BBender%2C+Steve%3BBlaney%2C+Diana%3BCloutis%2C+Edward%3BEhlmann%2C+Bethany+L%3BFraeman%2C+Abigail%3BGasnault%2C+Olivier%3BKinch%2C+Kjartan%3BLe+Mouelic%2C+Stephane%3BMaurice%2C+Sylvestre%3BRampe%2C+Elizabeth%3BVaniman%2C+David%3BWiens%2C+Roger+C&rft.aulast=Johnson&rft.aufirst=Jeffrey&rft.date=2016-07-01&rft.volume=101&rft.issue=7&rft.spage=1501&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam-2016-5553 L2 - http://www.minsocam.org/MSA/AmMin/TOC/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 89 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2016-09-16 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - basalts; chain silicates; ChemCam; Curiosity Rover; drilling; Gale Crater; hematite; identification; igneous rocks; infrared spectroscopy; iron oxides; iron sulfates; landing sites; magnetite; Mars; Mars Science Laboratory; Mount Sharp; near-infrared spectra; nesosilicates; olivine; olivine group; optical spectra; orthosilicates; oxides; planets; pyroxene group; reflectance; remote sensing; silicates; spectra; spectroscopy; sulfates; terrestrial planets; volcanic rocks DO - http://dx.doi.org/10.2138/am-2016-5553 ER - TY - JOUR T1 - High-stress triaxial direct-shear fracturing of Utica shale and in situ X-ray microtomography with permeability measurement AN - 1815696371; PQ0003584362 AB - The challenge of characterizing subsurface fluid flow has motivated extensive laboratory studies, yet fluid flow through rock specimens in which fractures are created and maintained at high-stress conditions remains underinvestigated at this time. The studies of this type that do exist do not include in situ fracture geometry measurements acquired at stressed conditions, which would be beneficial for interpreting the flow behavior. Therefore, this study investigates the apparent permeability induced by direct-shear fracture stimulation through Utica shale (a shale gas resource and potential caprock material) at high triaxial stress confinement and for the first time relates these values to simultaneously acquired in situ X-ray radiography and microtomography images. Change in fracture geometry and apparent permeability was also investigated at additional reduced stress states. Finite element and combined finite-discrete element modeling were used to evaluate the in situ observed fracturing process. Results from this study indicate that the increase in apparent permeability through fractures created at high-stress (22.2MPa) was minimal relative to the intact rock (less than 1 order of magnitude increase), while fractures created at low stress (3.4MPa) were significantly more permeable (2 to 4 orders of magnitude increase). This study demonstrates the benefit of in situ X-ray observation coupled with apparent permeability measurement to analyze fracture creation in the subsurface. Our results show that the permeability induced by fractures through shale at high stress can be minor and therefore favorable in application to CO sub(2) sequestration caprock integrity but unfavorable for hydrocarbon recovery from unconventional reservoirs. Key Points * Caprock leakage potential via fresh fractures decreases significantly with depth * In situ X-ray microtomography is used to better evaluate fracture flow behavior at elevated stresses * In situ X-ray video is used to observe fracture propagation at high stress and aid triaxial experiment control JF - Journal of Geophysical Research: Solid Earth AU - Frash, Luke P AU - Carey, JWilliam AU - Lei, Zhou AU - Rougier, Esteban AU - Ickes, Timothy AU - Viswanathan, Hari S AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 5493 EP - 5508 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 121 IS - 7 SN - 2169-9313, 2169-9313 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Audiovisual materials KW - Leakage KW - Fractures KW - Stress KW - Permeability KW - Potential resources KW - Sedimentary rocks KW - Radiography KW - Carbon dioxide KW - Shale KW - Fluid flow KW - Q2 09102:Institutes and organizations KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815696371?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=High-stress+triaxial+direct-shear+fracturing+of+Utica+shale+and+in+situ+X-ray+microtomography+with+permeability+measurement&rft.au=Frash%2C+Luke+P%3BCarey%2C+JWilliam%3BLei%2C+Zhou%3BRougier%2C+Esteban%3BIckes%2C+Timothy%3BViswanathan%2C+Hari+S&rft.aulast=Frash&rft.aufirst=Luke&rft.date=2016-07-01&rft.volume=121&rft.issue=7&rft.spage=5493&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2016JB012850 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Audiovisual materials; Permeability; Potential resources; Sedimentary rocks; Fractures; Radiography; Shale; Carbon dioxide; Fluid flow; Leakage; Stress DO - http://dx.doi.org/10.1002/2016JB012850 ER - TY - JOUR T1 - Quantitative Mass Spectrometry Reveals Changes in Histone H2B Variants as Cells Undergo Inorganic Arsenic-Mediated Cellular Transformation. AN - 1801435036; 27169413 AB - Exposure to inorganic arsenic, a ubiquitous environmental toxic metalloid, leads to carcinogenesis. However, the mechanism is unknown. Several studies have shown that inorganic arsenic exposure alters specific gene expression patterns, possibly through alterations in chromatin structure. While most studies on understanding the mechanism of chromatin-mediated gene regulation have focused on histone post-translational modifications, the role of histone variants remains largely unknown. Incorporation of histone variants alters the functional properties of chromatin. To understand the global dynamics of chromatin structure and function in arsenic-mediated carcinogenesis, analysis of the histone variants incorporated into the nucleosome and their covalent modifications is required. Here we report the first global mass spectrometric analysis of histone H2B variants as cells undergo arsenic-mediated epithelial to mesenchymal transition. We used electron capture dissociation-based top-down tandem mass spectrometry analysis validated with quantitative reverse transcription real-time polymerase chain reaction to identify changes in the expression levels of H2B variants in inorganic arsenic-mediated epithelial-mesenchymal transition. We identified changes in the expression levels of specific histone H2B variants in two cell types, which are dependent on dose and length of exposure of inorganic arsenic. In particular, we found increases in H2B variants H2B1H/1K/1C/1J/1O and H2B2E/2F, and significant decreases in H2B1N/1D/1B as cells undergo inorganic arsenic-mediated epithelial-mesenchymal transition. The analysis of these histone variants provides a first step toward an understanding of the functional significance of the diversity of histone structures, especially in inorganic arsenic-mediated gene expression and carcinogenesis. JF - Molecular & cellular proteomics : MCP AU - Rea, Matthew AU - Jiang, Tingting AU - Eleazer, Rebekah AU - Eckstein, Meredith AU - Marshall, Alan G AU - Fondufe-Mittendorf, Yvonne N AD - From the ‡Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky 40536; ; §Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306; ; §Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306; ¶Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310. ; From the ‡Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky 40536; y.fondufe-mittendorf@uky.edu. Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 2411 EP - 2422 VL - 15 IS - 7 KW - Index Medicus UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1801435036?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Molecular+%26+cellular+proteomics+%3A+MCP&rft.atitle=Quantitative+Mass+Spectrometry+Reveals+Changes+in+Histone+H2B+Variants+as+Cells+Undergo+Inorganic+Arsenic-Mediated+Cellular+Transformation.&rft.au=Rea%2C+Matthew%3BJiang%2C+Tingting%3BEleazer%2C+Rebekah%3BEckstein%2C+Meredith%3BMarshall%2C+Alan+G%3BFondufe-Mittendorf%2C+Yvonne+N&rft.aulast=Rea&rft.aufirst=Matthew&rft.date=2016-07-01&rft.volume=15&rft.issue=7&rft.spage=2411&rft.isbn=&rft.btitle=&rft.title=Molecular+%26+cellular+proteomics+%3A+MCP&rft.issn=1535-9484&rft_id=info:doi/10.1074%2Fmcp.M116.058412 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-07-02 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1074/mcp.M116.058412 ER - TY - JOUR T1 - The effect of crack orientation on the nonlinear interaction of a P wave with an S wave AN - 1815667609; 2016-076414 AB - Cracks, joints, fluids, and other pore-scale structures have long been hypothesized to be the cause of the large elastic nonlinearity observed in rocks. It is difficult to definitively say which pore-scale features are most important, however, because of the difficulty in isolating the source of the nonlinear interaction. In this work, we focus on the influence of cracks on the recorded nonlinear signal and in particular on how the orientation of microcracks changes the strength of the nonlinear interaction. We do this by studying the effect of orientation on the measurements in a rock with anisotropy correlated with the presence and alignment of microcracks. We measure the nonlinear response via the traveltime delay induced in a low-amplitude P wave probe by a high-amplitude S wave pump. We find evidence that crack orientation has a significant effect on the nonlinear signal. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - TenCate, J A AU - Malcolm, A E AU - Feng, X AU - Fehler, M C Y1 - 2016/06/28/ PY - 2016 DA - 2016 Jun 28 SP - 6146 EP - 6152 PB - American Geophysical Union, Washington, DC VL - 43 IS - 12 SN - 0094-8276, 0094-8276 KW - P-waves KW - anisotropic materials KW - strain KW - microcracks KW - data processing KW - sandstone KW - mechanism KW - fluid phase KW - elastic waves KW - frequency KW - rock mechanics KW - distortion KW - sedimentary rocks KW - propagation KW - orientation KW - body waves KW - experimental studies KW - elasticity KW - time variations KW - nonlinear distortion KW - stress KW - geophysical methods KW - effects KW - signals KW - seismic methods KW - solid phase KW - cracks KW - traveltime KW - seismic waves KW - nonlinear processes KW - clastic rocks KW - S-waves KW - instruments KW - image analysis KW - anisotropy KW - 30:Engineering geology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815667609?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=The+effect+of+crack+orientation+on+the+nonlinear+interaction+of+a+P+wave+with+an+S+wave&rft.au=TenCate%2C+J+A%3BMalcolm%2C+A+E%3BFeng%2C+X%3BFehler%2C+M+C&rft.aulast=TenCate&rft.aufirst=J&rft.date=2016-06-28&rft.volume=43&rft.issue=12&rft.spage=6146&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2016GL069219 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 21 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2016-09-01 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - anisotropic materials; anisotropy; body waves; clastic rocks; cracks; data processing; distortion; effects; elastic waves; elasticity; experimental studies; fluid phase; frequency; geophysical methods; image analysis; instruments; mechanism; microcracks; nonlinear distortion; nonlinear processes; orientation; P-waves; propagation; rock mechanics; S-waves; sandstone; sedimentary rocks; seismic methods; seismic waves; signals; solid phase; strain; stress; time variations; traveltime DO - http://dx.doi.org/10.1002/2016GL069219 ER - TY - JOUR T1 - Constraining depth range of S wave velocity decrease after large earthquakes near Parkfield, California AN - 1815665270; 2016-076412 AB - We use noise correlation and surface wave inversion to measure the S wave velocity changes at different depths near Parkfield, California, after the 2003 San Simeon and 2004 Parkfield earthquakes. We process continuous seismic recordings from 13 stations to obtain the noise cross-correlation functions and measure the Rayleigh wave phase velocity changes over six frequency bands. We then invert the Rayleigh wave phase velocity changes using a series of sensitivity kernels to obtain the S wave velocity changes at different depths. Our results indicate that the S wave velocity decreases caused by the San Simeon earthquake are relatively small ( approximately 0.02%) and access depths of at least 2.3 km. The S wave velocity decreases caused by the Parkfield earthquake are larger ( approximately 0.2%), and access depths of at least 1.2 km. Our observations can be best explained by material damage and healing resulting mainly from the dynamic stress perturbations of the two large earthquakes. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Wu, Chunquan AU - Delorey, Andrew AU - Brenguier, Florent AU - Hadziioannou, Celine AU - Daub, Eric G AU - Johnson, Paul Y1 - 2016/06/28/ PY - 2016 DA - 2016 Jun 28 SP - 6129 EP - 6136 PB - American Geophysical Union, Washington, DC VL - 43 IS - 12 SN - 0094-8276, 0094-8276 KW - velocity analysis KW - United States KW - geophysical surveys KW - characteristic earthquakes KW - data processing KW - mechanism KW - elastic waves KW - frequency KW - California KW - surface waves KW - phase velocity KW - stacking KW - crosscorrelation KW - Monterey County California KW - velocity KW - Parkfield California KW - algorithms KW - Parkfield earthquakes KW - body waves KW - seismic profiles KW - seismology KW - annual variations KW - guided waves KW - time variations KW - Central California KW - statistical analysis KW - San Luis Obispo County California KW - geophysical methods KW - inverse problem KW - San Simeon earthquake 2003 KW - Rayleigh waves KW - interferometry KW - depth KW - seismic methods KW - noise KW - Parkfield earthquake 2004 KW - surveys KW - geophysical profiles KW - seismic waves KW - seismic networks KW - earthquakes KW - S-waves KW - 19:Seismology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815665270?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Constraining+depth+range+of+S+wave+velocity+decrease+after+large+earthquakes+near+Parkfield%2C+California&rft.au=Wu%2C+Chunquan%3BDelorey%2C+Andrew%3BBrenguier%2C+Florent%3BHadziioannou%2C+Celine%3BDaub%2C+Eric+G%3BJohnson%2C+Paul&rft.aulast=Wu&rft.aufirst=Chunquan&rft.date=2016-06-28&rft.volume=43&rft.issue=12&rft.spage=6129&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2016GL069145 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 49 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map, 1 table, sect. N1 - Last updated - 2016-10-25 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - algorithms; annual variations; body waves; California; Central California; characteristic earthquakes; crosscorrelation; data processing; depth; earthquakes; elastic waves; frequency; geophysical methods; geophysical profiles; geophysical surveys; guided waves; interferometry; inverse problem; mechanism; Monterey County California; noise; Parkfield California; Parkfield earthquake 2004; Parkfield earthquakes; phase velocity; Rayleigh waves; S-waves; San Luis Obispo County California; San Simeon earthquake 2003; seismic methods; seismic networks; seismic profiles; seismic waves; seismology; stacking; statistical analysis; surface waves; surveys; time variations; United States; velocity; velocity analysis DO - http://dx.doi.org/10.1002/2016GL069145 ER - TY - JOUR T1 - Irradiation-induced grain growth and defect evolution in nanocrystalline zirconia with doped grain boundaries. AN - 1799211323; 27282392 AB - Grain boundaries are effective sinks for radiation-induced defects, ultimately impacting the radiation tolerance of nanocrystalline materials (dense materials with nanosized grains) against net defect accumulation. However, irradiation-induced grain growth leads to grain boundary area decrease, shortening potential benefits of nanostructures. A possible approach to mitigate this is the introduction of dopants to target a decrease in grain boundary mobility or a reduction in grain boundary energy to eliminate driving forces for grain growth (using similar strategies as to control thermal growth). Here we tested this concept in nanocrystalline zirconia doped with lanthanum. Although the dopant is observed to segregate to the grain boundaries, causing grain boundary energy decrease and promoting dragging forces for thermally activated boundary movement, irradiation induced grain growth could not be avoided under heavy ion irradiation, suggesting a different growth mechanism as compared to thermal growth. Furthermore, it is apparent that reducing the grain boundary energy reduced the effectiveness of the grain boundary as sinks, and the number of defects in the doped material is higher than in undoped (La-free) YSZ. JF - Physical chemistry chemical physics : PCCP AU - Dey, Sanchita AU - Mardinly, John AU - Wang, Yongqiang AU - Valdez, James A AU - Holesinger, Terry G AU - Uberuaga, Blas P AU - Ditto, Jeff J AU - Drazin, John W AU - Castro, Ricardo H R AD - Department of Materials Science and Engineering & NEAT ORU, University of California, Davis, CA 95616, USA. rhrcastro@ucdavis.edu. ; John Cowley Center for HREM, LE-CSSS. Arizona State University, Tempe, AZ, USA. ; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. ; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. ; Department of Chemistry and Biochemistry, University of Oregon, Eugene, OR 97403, USA. Y1 - 2016/06/22/ PY - 2016 DA - 2016 Jun 22 SP - 16921 EP - 16929 VL - 18 IS - 25 KW - Index Medicus UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1799211323?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Physical+chemistry+chemical+physics+%3A+PCCP&rft.atitle=Irradiation-induced+grain+growth+and+defect+evolution+in+nanocrystalline+zirconia+with+doped+grain+boundaries.&rft.au=Dey%2C+Sanchita%3BMardinly%2C+John%3BWang%2C+Yongqiang%3BValdez%2C+James+A%3BHolesinger%2C+Terry+G%3BUberuaga%2C+Blas+P%3BDitto%2C+Jeff+J%3BDrazin%2C+John+W%3BCastro%2C+Ricardo+H+R&rft.aulast=Dey&rft.aufirst=Sanchita&rft.date=2016-06-22&rft.volume=18&rft.issue=25&rft.spage=16921&rft.isbn=&rft.btitle=&rft.title=Physical+chemistry+chemical+physics+%3A+PCCP&rft.issn=1463-9084&rft_id=info:doi/10.1039%2Fc6cp01763k LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-06-22 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1039/c6cp01763k ER - TY - JOUR T1 - Wellbore and groundwater temperature distribution eastern Snake River plain, Idaho; implications for groundwater flow and geothermal potential AN - 1824216041; 2016-085176 AB - A map of groundwater temperatures from the Eastern Snake River Plain (ESRP) regional aquifer can be used to identify and interpret important features of the aquifer, including aquifer flow direction, aquifer thickness, and potential geothermal anomalies. The ESRP is an area of high heat flow, yet most of this thermal energy fails to reach the surface, due to the heat being swept downgradient by the aquifer to the major spring complexes near Thousand Springs, ID, a distance of 300 km. Nine deep boreholes that fully penetrate the regional aquifer display three common features: (1) high thermal gradients beneath the aquifer, corresponding to high conductive heat flow in low-permeability hydrothermally-altered rocks; (2) isothermal temperature profiles within the aquifer, characteristic of an actively flowing groundwater; and (3) moderate thermal gradients in the vadose zone with values that indicate that over half of the geothermal heat flow is removed by advective transport in the regional aquifer system. This study utilized temperature data from 250 ESRP aquifer wells to evaluate regional aquifer flow direction, aquifer thickness, and potential geothermal anomalies. Because the thermal gradients are typically low in the aquifer, any measurement of groundwater temperature is a reasonable estimate of temperature throughout the aquifer thickness, allowing the construction of a regional aquifer temperature map for the ESRP. Mapped temperatures are used to identify cold thermal plumes associated with recharge from tributary valleys and adjacent uplands, and warm zones associated with geothermal input to the aquifer. Warm zones in the aquifer can have various causes, including local circulation of groundwater through the deep conductively dominated region, slow groundwater movement in low-permeability regions, or localized heat flow from deeper thermal features. JF - Journal of Volcanology and Geothermal Research AU - McLing, Travis L AU - Smith, Richard P AU - Smith, Robert W AU - Blackwell, David D AU - Roback, Robert C AU - Sondrup, Andrus J Y1 - 2016/06/15/ PY - 2016 DA - 2016 Jun 15 SP - 144 EP - 155 PB - Elsevier, Amsterdam VL - 320 SN - 0377-0273, 0377-0273 KW - United States KW - plumes KW - thermal alteration KW - unsaturated zone KW - preferential flow KW - metasomatism KW - temperature KW - ground water KW - geothermal systems KW - thermal anomalies KW - transport KW - heat flow KW - tracers KW - hydrothermal alteration KW - geothermal gradient KW - Idaho KW - fluid flow KW - advection KW - distribution KW - aquifers KW - geothermal energy KW - water table KW - geothermal exploration KW - boreholes KW - water wells KW - Snake River plain KW - permeability KW - 29A:Economic geology, geology of energy sources KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824216041?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Volcanology+and+Geothermal+Research&rft.atitle=Wellbore+and+groundwater+temperature+distribution+eastern+Snake+River+plain%2C+Idaho%3B+implications+for+groundwater+flow+and+geothermal+potential&rft.au=McLing%2C+Travis+L%3BSmith%2C+Richard+P%3BSmith%2C+Robert+W%3BBlackwell%2C+David+D%3BRoback%2C+Robert+C%3BSondrup%2C+Andrus+J&rft.aulast=McLing&rft.aufirst=Travis&rft.date=2016-06-15&rft.volume=320&rft.issue=&rft.spage=144&rft.isbn=&rft.btitle=&rft.title=Journal+of+Volcanology+and+Geothermal+Research&rft.issn=03770273&rft_id=info:doi/10.1016%2Fj.jvolgeores.2016.04.006 L2 - http://www.sciencedirect.com/science/journal/03770273 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 110 N1 - Document feature - illus. incl. sect., 1 table, sketch maps N1 - Last updated - 2016-09-29 N1 - CODEN - JVGRDQ N1 - SubjectsTermNotLitGenreText - advection; aquifers; boreholes; distribution; fluid flow; geothermal energy; geothermal exploration; geothermal gradient; geothermal systems; ground water; heat flow; hydrothermal alteration; Idaho; metasomatism; permeability; plumes; preferential flow; Snake River plain; temperature; thermal alteration; thermal anomalies; tracers; transport; United States; unsaturated zone; water table; water wells DO - http://dx.doi.org/10.1016/j.jvolgeores.2016.04.006 ER - TY - JOUR T1 - Multiple plates subducting beneath Colombia, as illuminated by seismicity and velocity from the joint inversion of seismic and gravity data AN - 1800393199; 2016-056435 AB - Subduction beneath the northernmost Andes in Colombia is complex. Based on seismicity distributions, multiple segments of slab appear to be subducting, and arc volcanism ceases north of 5 degrees N. Here, we illuminate the subduction system through hypocentral relocations and Vp and Vs models resulting from the joint inversion of local body wave arrivals, surface wave dispersion measurements, and gravity data. The simultaneous use of multiple data types takes advantage of the differing sensitivities of each data type, resulting in velocity models that have improved resolution at both shallower and deeper depths than would result from traditional travel time tomography alone. The relocated earthquake dataset and velocity model clearly indicate a tear in the Nazca slab at 5 degrees N, corresponding to a 250-km shift in slab seismicity and the termination of arc volcanism. North of this tear, the slab is flat, and it comprises slabs of two sources: the Nazca and Caribbean plates. The Bucaramanga nest, a small region of among the most intense intermediate-depth seismicity globally, is associated with the boundary between these two plates and possibly with a zone of melting or elevated water content, based on reduced Vp and increased Vp/Vs. We also use relocated seismicity to identify two new faults in the South American plate, one related to plate convergence and one highlighted by induced seismicity. Abstract Copyright (2016) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Syracuse, Ellen M AU - Maceira, Monica AU - Prieto, German A AU - Zhang, Haijiang AU - Ammon, Charles J Y1 - 2016/06/15/ PY - 2016 DA - 2016 Jun 15 SP - 139 EP - 149 PB - Elsevier, Amsterdam VL - 444 SN - 0012-821X, 0012-821X KW - subduction zones KW - geophysical surveys KW - South American Plate KW - segmentation KW - elastic waves KW - Colombia KW - gravity methods KW - surface waves KW - seismicity KW - volcanism KW - focus KW - Bucaramanga Nest KW - faults KW - body waves KW - guided waves KW - geophysical methods KW - inverse problem KW - Caribbean region KW - subduction KW - plate convergence KW - depth KW - Caribbean Plate KW - South America KW - plate tectonics KW - velocity structure KW - slabs KW - surveys KW - seismic waves KW - earthquakes KW - Nazca Plate KW - 18:Solid-earth geophysics KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800393199?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+and+Planetary+Science+Letters&rft.atitle=Multiple+plates+subducting+beneath+Colombia%2C+as+illuminated+by+seismicity+and+velocity+from+the+joint+inversion+of+seismic+and+gravity+data&rft.au=Syracuse%2C+Ellen+M%3BMaceira%2C+Monica%3BPrieto%2C+German+A%3BZhang%2C+Haijiang%3BAmmon%2C+Charles+J&rft.aulast=Syracuse&rft.aufirst=Ellen&rft.date=2016-06-15&rft.volume=7&rft.issue=3&rft.spage=1183&rft.isbn=&rft.btitle=&rft.title=Geoscientific+Model+Development+%28GMD%29&rft.issn=1991959X&rft_id=info:doi/ L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 70 N1 - Document feature - illus. incl. sects., sketch maps N1 - SuppNotes - Includes appendix N1 - Last updated - 2016-06-30 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - body waves; Bucaramanga Nest; Caribbean Plate; Caribbean region; Colombia; depth; earthquakes; elastic waves; faults; focus; geophysical methods; geophysical surveys; gravity methods; guided waves; inverse problem; Nazca Plate; plate convergence; plate tectonics; segmentation; seismic waves; seismicity; slabs; South America; South American Plate; subduction; subduction zones; surface waves; surveys; velocity structure; volcanism DO - http://dx.doi.org/10.1016/j.epsl.2016.03.050 ER - TY - JOUR T1 - Self-Assembled Epitaxial Au-Oxide Vertically Aligned Nanocomposites for Nanoscale Metamaterials. AN - 1795868495; 27186652 AB - Metamaterials made of nanoscale inclusions or artificial unit cells exhibit exotic optical properties that do not exist in natural materials. Promising applications, such as super-resolution imaging, cloaking, hyperbolic propagation, and ultrafast phase velocities have been demonstrated based on mostly micrometer-scale metamaterials and few nanoscale metamaterials. To date, most metamaterials are created using costly and tedious fabrication techniques with limited paths toward reliable large-scale fabrication. In this work, we demonstrate the one-step direct growth of self-assembled epitaxial metal-oxide nanocomposites as a drastically different approach to fabricating large-area nanostructured metamaterials. Using pulsed laser deposition, we fabricated nanocomposite films with vertically aligned gold (Au) nanopillars (∼20 nm in diameter) embedded in various oxide matrices with high epitaxial quality. Strong, broad absorption features in the measured absorbance spectrum are clear signatures of plasmon resonances of Au nanopillars. By tuning their densities on selected substrates, anisotropic optical properties are demonstrated via angular dependent and polarization resolved reflectivity measurements and reproduced by full-wave simulations and effective medium theory. Our model predicts exotic properties, such as zero permittivity responses and topological transitions. Our studies suggest that these self-assembled metal-oxide nanostructures provide an exciting new material platform to control and enhance optical response at nanometer scales. JF - Nano letters AU - Li, Leigang AU - Sun, Liuyang AU - Gomez-Diaz, Juan Sebastian AU - Hogan, Nicki L AU - Lu, Ping AU - Khatkhatay, Fauzia AU - Zhang, Wenrui AU - Jian, Jie AU - Huang, Jijie AU - Su, Qing AU - Fan, Meng AU - Jacob, Clement AU - Li, Jin AU - Zhang, Xinghang AU - Jia, Quanxi AU - Sheldon, Matthew AU - Alù, Andrea AU - Li, Xiaoqin AU - Wang, Haiyan AD - Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States. ; Department of Chemistry, Texas A&M University , College Station, Texas 77843, United States. ; Sandia National Laboratories , Albuquerque, New Mexico 87185, United States. ; Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States. Y1 - 2016/06/08/ PY - 2016 DA - 2016 Jun 08 SP - 3936 EP - 3943 VL - 16 IS - 6 KW - Index Medicus KW - plasmonic property KW - Nanoscale metamaterial KW - gold nanopillar KW - vertically aligned nanocomposite (VAN) KW - self-assembled metamaterial KW - BaTiO3 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1795868495?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nano+letters&rft.atitle=Self-Assembled+Epitaxial+Au-Oxide+Vertically+Aligned+Nanocomposites+for+Nanoscale+Metamaterials.&rft.au=Li%2C+Leigang%3BSun%2C+Liuyang%3BGomez-Diaz%2C+Juan+Sebastian%3BHogan%2C+Nicki+L%3BLu%2C+Ping%3BKhatkhatay%2C+Fauzia%3BZhang%2C+Wenrui%3BJian%2C+Jie%3BHuang%2C+Jijie%3BSu%2C+Qing%3BFan%2C+Meng%3BJacob%2C+Clement%3BLi%2C+Jin%3BZhang%2C+Xinghang%3BJia%2C+Quanxi%3BSheldon%2C+Matthew%3BAl%C3%B9%2C+Andrea%3BLi%2C+Xiaoqin%3BWang%2C+Haiyan&rft.aulast=Li&rft.aufirst=Leigang&rft.date=2016-06-08&rft.volume=16&rft.issue=6&rft.spage=3936&rft.isbn=&rft.btitle=&rft.title=Nano+letters&rft.issn=1530-6992&rft_id=info:doi/10.1021%2Facs.nanolett.6b01575 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-06-09 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acs.nanolett.6b01575 ER - TY - JOUR T1 - Identification of hydrochemical facies in the Roswell Artesian Basin, New Mexico (USA), using graphical and statistical methods AN - 1849305770; 2016-110438 AB - Analysis of groundwater chemistry can yield important insights about subsurface conditions, and provide an alternative and complementary method for characterizing basin hydrogeology, especially in areas where hydraulic data are limited. More specifically, hydrochemical facies have been used for decades to help understand basin flow and transport, and a set of facies were developed for the Roswell Artesian Basin (RAB) in a semi-arid part of New Mexico, USA. The RAB is an important agricultural water source, and is an excellent example of a rechargeable artesian system. However, substantial uncertainties about the RAB hydrogeology and groundwater chemistry exist. The RAB was a great opportunity to explore hydrochemcial facies definition. A set of facies, derived from fingerprint diagrams (graphical approach), existed as a basis for testing and for comparison to principal components, factor analysis, and cluster analyses (statistical approaches). Geochemical data from over 300 RAB wells in the central basin were examined. The statistical testing of fingerprint-diagram-based facies was useful in terms of quantitatively evaluating differences between facies, and for understanding potential controls on basin groundwater chemistry. This study suggests the presence of three hydrochemical facies in the shallower part of the RAB (mostly unconfined conditions) and three in the deeper artesian system of the RAB. These facies reflect significant spatial differences in chemistry in the basin that are associated with specific stratigraphic intervals as well as structural features. Substantial chemical variability across faults and within fault blocks was also observed. Copyright 2016 Springer-Verlag Berlin Heidelberg and Springer-Verlag Berlin Heidelberg (outside the USA) JF - Hydrogeology Journal AU - Newman, Brent D AU - Havenor, Kay C AU - Longmire, Patrick Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 819 EP - 839 PB - Springer, Berlin - Heidelberg VL - 24 IS - 4 SN - 1431-2174, 1431-2174 KW - calcium KW - water quality KW - terrestrial environment KW - agricultural waste KW - halogens KW - Rustler Formation KW - New Mexico KW - ions KW - cluster analysis KW - artesian waters KW - sedimentary rocks KW - hydrochemical facies KW - chloride ion KW - nitrate ion KW - faults KW - Santa Rosa Sandstone KW - Roswell New Mexico KW - sulfate ion KW - Guadalupian KW - Paleozoic KW - solutes KW - potentiometric surface KW - Upper Permian KW - recharge KW - Chaves County New Mexico KW - alluvium aquifers KW - Carlsbad New Mexico KW - waste disposal KW - carbonate rocks KW - water resources KW - United States KW - Sacramento Mountains KW - Eddy County New Mexico KW - factor analysis KW - semi-arid environment KW - environmental analysis KW - ground water KW - Roswell Artesian Basin KW - Triassic KW - Pecos Slope KW - Upper Triassic KW - chemical composition KW - Salado Formation KW - chlorine KW - concentration KW - alkaline earth metals KW - three-dimensional models KW - Artesia Group KW - statistical analysis KW - pollution KW - Permian KW - Mesozoic KW - aquifers KW - lithofacies KW - metals KW - Castile Formation KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849305770?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=Identification+of+hydrochemical+facies+in+the+Roswell+Artesian+Basin%2C+New+Mexico+%28USA%29%2C+using+graphical+and+statistical+methods&rft.au=Newman%2C+Brent+D%3BHavenor%2C+Kay+C%3BLongmire%2C+Patrick&rft.aulast=Newman&rft.aufirst=Brent&rft.date=2016-06-01&rft.volume=24&rft.issue=4&rft.spage=819&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-016-1401-3 L2 - http://www.springerlink.com/content/102028/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 33 N1 - Document feature - illus. incl. 7 tables, geol. sketch maps N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - agricultural waste; alkaline earth metals; alluvium aquifers; aquifers; Artesia Group; artesian waters; calcium; carbonate rocks; Carlsbad New Mexico; Castile Formation; Chaves County New Mexico; chemical composition; chloride ion; chlorine; cluster analysis; concentration; Eddy County New Mexico; environmental analysis; factor analysis; faults; ground water; Guadalupian; halogens; hydrochemical facies; ions; lithofacies; Mesozoic; metals; New Mexico; nitrate ion; Paleozoic; Pecos Slope; Permian; pollution; potentiometric surface; recharge; Roswell Artesian Basin; Roswell New Mexico; Rustler Formation; Sacramento Mountains; Salado Formation; Santa Rosa Sandstone; sedimentary rocks; semi-arid environment; solutes; statistical analysis; sulfate ion; terrestrial environment; three-dimensional models; Triassic; United States; Upper Permian; Upper Triassic; waste disposal; water quality; water resources DO - http://dx.doi.org/10.1007/s10040-016-1401-3 ER - TY - JOUR T1 - The hydrogeology of the Sacramento Mountains and Roswell and Salt Basins of New Mexico, USA; overview of investigations on dryland groundwater systems using environmental tracers and geochemical approaches AN - 1849304999; 2016-110434 JF - Hydrogeology Journal AU - Newman, Brent D AU - Land, Lewis AU - Phillips, Fred M AU - Rawling, Geoffrey C Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 753 EP - 756 PB - Springer, Berlin - Heidelberg VL - 24 IS - 4 SN - 1431-2174, 1431-2174 KW - United States KW - water quality KW - Sacramento Mountains KW - terrestrial environment KW - south-central New Mexico KW - Salt Basin KW - hydrogeology KW - atmospheric precipitation KW - New Mexico KW - preferential flow KW - climate change KW - ground water KW - sedimentary rocks KW - water-rock interaction KW - conservation KW - tracers KW - hydrofacies KW - chemical composition KW - Rowswell Basin KW - arid environment KW - aquifers KW - recharge KW - residence time KW - carbonate rocks KW - water resources KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849304999?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=The+hydrogeology+of+the+Sacramento+Mountains+and+Roswell+and+Salt+Basins+of+New+Mexico%2C+USA%3B+overview+of+investigations+on+dryland+groundwater+systems+using+environmental+tracers+and+geochemical+approaches&rft.au=Newman%2C+Brent+D%3BLand%2C+Lewis%3BPhillips%2C+Fred+M%3BRawling%2C+Geoffrey+C&rft.aulast=Newman&rft.aufirst=Brent&rft.date=2016-06-01&rft.volume=24&rft.issue=4&rft.spage=753&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-016-1404-0 L2 - http://www.springerlink.com/content/102028/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 19 N1 - Document feature - illus. N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - aquifers; arid environment; atmospheric precipitation; carbonate rocks; chemical composition; climate change; conservation; ground water; hydrofacies; hydrogeology; New Mexico; preferential flow; recharge; residence time; Rowswell Basin; Sacramento Mountains; Salt Basin; sedimentary rocks; south-central New Mexico; terrestrial environment; tracers; United States; water quality; water resources; water-rock interaction DO - http://dx.doi.org/10.1007/s10040-016-1404-0 ER - TY - JOUR T1 - High-pressure behavior of the polymorphs of FeOOH AN - 1819895259; 2016-079209 AB - The high-pressure structural and electronic behavior of alpha -, beta -, and gamma -FeOOH were studied in situ using a combination of synchrotron X-ray diffraction (XRD) and X-ray emission spectroscopy (XES). We monitored alpha -FeOOH by XES as a function of pressure up to 85 GPa and observed an electronic spin transition that began at approximately 50 GPa, which is consistent with previous results. In the gamma -FeOOH sample, we see the initiation of a spin transition at 35 GPa that remains incomplete up to 65 GPa. beta -FeOOH does not show any indication of a spin transition up to 65 GPa. Analysis of the high-pressure XRD data shows that neither beta -FeOOH nor gamma -FeOOH transform to new crystal structures, and both amorphize above 20 GPa. Comparing our EOS results for the beta and gamma phases with recently published data on the alpha and epsilon phases, we found that beta -FeOOH exhibits distinct behavior from the other three polymorphs, as it is significantly less compressible and does not undergo a spin transition. A systematic examination of these iron hydroxide polymorphs as a function of pressure can provide insight into the relationship between electronic spin transitions and structural transitions in these OH- and Fe (super 3+) -bearing phases that may have implications on our understanding of the water content and oxidation state of the mantle. JF - American Mineralogist AU - Reagan, Mary M AU - Gleason, Arianna E AU - Daemen, Luke AU - Xiao, Yuming AU - Mao, Wendy L Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 1483 EP - 1488 PB - Mineralogical Society of America, Washington, DC VL - 101 IS - 6 SN - 0003-004X, 0003-004X KW - water KW - pressure KW - X-ray diffraction data KW - mantle KW - phase transitions KW - crystal structure KW - high pressure KW - X-ray spectra KW - iron hydroxides KW - iron KW - hydroxides KW - hydroxyl ion KW - ferric iron KW - polymorphism KW - metals KW - oxides KW - spectra KW - electronic spin transitions KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819895259?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Mineralogist&rft.atitle=High-pressure+behavior+of+the+polymorphs+of+FeOOH&rft.au=Reagan%2C+Mary+M%3BGleason%2C+Arianna+E%3BDaemen%2C+Luke%3BXiao%2C+Yuming%3BMao%2C+Wendy+L&rft.aulast=Reagan&rft.aufirst=Mary&rft.date=2016-06-01&rft.volume=101&rft.issue=6&rft.spage=1483&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam-2016-5449 L2 - http://www.minsocam.org/MSA/AmMin/TOC/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 31 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-09-16 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - crystal structure; electronic spin transitions; ferric iron; high pressure; hydroxides; hydroxyl ion; iron; iron hydroxides; mantle; metals; oxides; phase transitions; polymorphism; pressure; spectra; water; X-ray diffraction data; X-ray spectra DO - http://dx.doi.org/10.2138/am-2016-5449 ER - TY - JOUR T1 - Characterization at Atomic Resolution of Carbon Nanotube/Resin Interface in Nanocomposites by Mapping sp super(2)-Bonding States Using Electron Energy-Loss Spectroscopy AN - 1808645982; PQ0003335753 AB - Functionalization is critical for improving mechanical properties of carbon nanotubes (CNTs)/polymer nanocomposites. A fundamental understanding of the role of the CNT/polymer interface and bonding structure is key to improving functionalization procedures for higher mechanical performance. In this study, we investigated the effects of chemical functionalization on the nanocomposite interface at atomic resolution to provide direct and quantifiable information of the interactions and interface formation between CNT surfaces and adjacent resin molecules. We observed and compared electronic structures and their changes at the interfaces of nonfunctionalized and functionalized CNT/polymer nanocomposite samples via scanning transmission electron microscopy and electron energy-loss spectroscopy (EELS) spectrum imaging techniques. The results show that the state of sp super(2) bonding and its distribution at the CNT/resin interface can be clearly visualized through EELS mapping. We found that the functionalized CNT/polymer samples exhibited a lower fraction of sp super(2) bonding and a lower [pi]*/[sigma]* ratio compared with the nonfunctionalized cases. A good correlation between near-edge fine structures and low-loss plasmon energies was observed. JF - Microscopy and Microanalysis AU - Su, Yi-Feng AU - Park, Jin G AU - Koo, Ana AU - Trayner, Sarah AU - Hao, Ayou AU - Downes, Rebekah AU - Liang, Richard AD - National High Magnetic Field Laboratory, High-Performance Materials Institute, Florida State University, Tallahassee, FL 32310, USA, zliang@fsu.edu Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 666 EP - 672 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 22 IS - 3 SN - 1431-9276, 1431-9276 KW - Biotechnology and Bioengineering Abstracts KW - Resins KW - Carbon KW - Transmission electron microscopy KW - Energy KW - Nanocomposites KW - Mapping KW - Spectroscopy KW - Ultrastructure KW - imaging KW - Mechanical properties KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808645982?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Microscopy+and+Microanalysis&rft.atitle=Characterization+at+Atomic+Resolution+of+Carbon+Nanotube%2FResin+Interface+in+Nanocomposites+by+Mapping+sp+super%282%29-Bonding+States+Using+Electron+Energy-Loss+Spectroscopy&rft.au=Su%2C+Yi-Feng%3BPark%2C+Jin+G%3BKoo%2C+Ana%3BTrayner%2C+Sarah%3BHao%2C+Ayou%3BDownes%2C+Rebekah%3BLiang%2C+Richard&rft.aulast=Su&rft.aufirst=Yi-Feng&rft.date=2016-06-01&rft.volume=22&rft.issue=3&rft.spage=666&rft.isbn=&rft.btitle=&rft.title=Microscopy+and+Microanalysis&rft.issn=14319276&rft_id=info:doi/10.1017%2FS1431927616000805 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Number of references - 36 N1 - Last updated - 2016-08-17 N1 - SubjectsTermNotLitGenreText - Resins; Carbon; Energy; Transmission electron microscopy; Nanocomposites; Mapping; Ultrastructure; Spectroscopy; imaging; Mechanical properties DO - http://dx.doi.org/10.1017/S1431927616000805 ER - TY - JOUR T1 - Magmatic complexity on early Mars as seen through a combination of orbital, in situ and meteorite data AN - 1803774620; 2016-062762 AB - Until recently, Mars was considered a basalt-covered world, but this vision is evolving thanks to new orbital, in situ and meteorite observations, in particular of rocks of the ancient Noachian period. In this contribution we summarise newly recognised compositional and mineralogical differences between older and more recent rocks, and explore the geodynamic implications of these new findings. For example the MSL rover has discovered abundant felsic rocks close to the landing site coming from the wall of Gale crater ranging from alkali basalt to trachyte. In addition, the recently discovered Martian regolith breccia NWA 7034 (and paired samples) contain many coarse-grained noritic-monzonitic clasts demonstrably Noachian in age, and even some clasts that plot in the mugearite field. Olivine is also conspicuously lacking in these ancient samples, in contrast to later Hesperian rocks. The alkali-suite requires low-degree melting of the Martian mantle at low pressure, whereas the later Hesperian magmatism would appear to be produced by higher mantle temperatures. Various scenarios are proposed to explain these observations, including different styles of magmatic activity (i.e. passive upwelling vs. hotspots). A second petrological suite of increasing interest involves quartzo-feldspathic materials that were first inferred from orbit, in local patches in the southern highlands and in the lower units of Valles Marineris. However, identification of felsic rocks from orbit is limited by the low detectability of feldspar in the near infrared. On the other hand, the MSL rover has described the texture, mineralogy and composition of felsic rocks in Gale crater that are granodiorite-like samples akin to terrestrial TTG (Tonalite-Trondhjemite-Granodiorite suites). These observations, and the low average density of the highlands crust, suggest the early formation of 'continental' crust on Mars, although the details of the geodynamic scenario and the importance of volatiles in their generation are aspects that require further work. Abstract Copyright (2016) Elsevier, B.V. JF - Lithos (Oslo) AU - Sautter, Violaine AU - Toplis, Michael J AU - Beck, Pierre AU - Mangold, Nicolas AU - Wiens, Roger AU - Pinet, Patrick AU - Cousin, Agnes AU - Maurice, Sylvestre AU - LeDeit, Laetitia AU - Hewins, Roger AU - Gasnault, Olivier AU - Quantin, Cathy AU - Forni, Olivier AU - Newsom, Horton AU - Meslin, Pierre-Yves AU - Wray, James AU - Bridges, Nathan T AU - Payre, Valerie AU - Rapin, William AU - Le Mouelic, Stephane Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 36 EP - 52 PB - Elsevier, Amsterdam VL - 254-255 SN - 0024-4937, 0024-4937 KW - Northwest Africa Meteorites KW - near-infrared spectra KW - Valles Marineris KW - stony meteorites KW - Martian meteorites KW - igneous rocks KW - Mars KW - mapping KW - monzonites KW - Gale Crater KW - meteorites KW - plutonic rocks KW - mineral composition KW - NWA 7034 KW - granodiorites KW - spectra KW - norite KW - chemical composition KW - geochemistry KW - breccia KW - textures KW - magmatism KW - cosmochemistry KW - achondrites KW - alkalic composition KW - terrestrial planets KW - planets KW - magmas KW - tonalite-trondhjemite-granodiorite magmas KW - gabbros KW - regolith KW - crust KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803774620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Lithos+%28Oslo%29&rft.atitle=Magmatic+complexity+on+early+Mars+as+seen+through+a+combination+of+orbital%2C+in+situ+and+meteorite+data&rft.au=Sautter%2C+Violaine%3BToplis%2C+Michael+J%3BBeck%2C+Pierre%3BMangold%2C+Nicolas%3BWiens%2C+Roger%3BPinet%2C+Patrick%3BCousin%2C+Agnes%3BMaurice%2C+Sylvestre%3BLeDeit%2C+Laetitia%3BHewins%2C+Roger%3BGasnault%2C+Olivier%3BQuantin%2C+Cathy%3BForni%2C+Olivier%3BNewsom%2C+Horton%3BMeslin%2C+Pierre-Yves%3BWray%2C+James%3BBridges%2C+Nathan+T%3BPayre%2C+Valerie%3BRapin%2C+William%3BLe+Mouelic%2C+Stephane&rft.aulast=Sautter&rft.aufirst=Violaine&rft.date=2016-06-01&rft.volume=254-255&rft.issue=&rft.spage=36&rft.isbn=&rft.btitle=&rft.title=Lithos+%28Oslo%29&rft.issn=00244937&rft_id=info:doi/10.1016%2Fj.lithos.2016.02.023 L2 - http://www.sciencedirect.com/science/journal/00244937 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 142 N1 - Document feature - illus. N1 - Last updated - 2016-07-14 N1 - CODEN - LITHAN N1 - SubjectsTermNotLitGenreText - achondrites; alkalic composition; breccia; chemical composition; cosmochemistry; crust; gabbros; Gale Crater; geochemistry; granodiorites; igneous rocks; magmas; magmatism; mapping; Mars; Martian meteorites; meteorites; mineral composition; monzonites; near-infrared spectra; norite; Northwest Africa Meteorites; NWA 7034; planets; plutonic rocks; regolith; spectra; stony meteorites; terrestrial planets; textures; tonalite-trondhjemite-granodiorite magmas; Valles Marineris DO - http://dx.doi.org/10.1016/j.lithos.2016.02.023 ER - TY - JOUR T1 - Choline and Geranate Deep Eutectic Solvent as a Broad-Spectrum Antiseptic Agent for Preventive and Therapeutic Applications. AN - 1795873611; 26959835 AB - Antiseptic agents are the primary arsenal to disinfect skin and prevent pathogens spreading within the host as well as into the surroundings; however the Food and Drug Administration published a report in 2015 requiring additional validation of nearly all current antiseptic agents before their continued use can be allowed. This vulnerable position calls for urgent identification of novel antiseptic agents. Recently, the ability of a deep eutectic, Choline And Geranate (CAGE), to treat biofilms of Pseudomonas aeruginosa and Salmonella enterica was demonstrated. Here it is reported that CAGE exhibits broad-spectrum antimicrobial activity against a number of drug-resistant bacteria, fungi, and viruses including clinical isolates of Mycobacterium tuberculosis, Staphylococcus aureus, and Candida albicans as well as laboratory strains of Herpes Simplex Virus. Studies in human keratinocytes and mice show that CAGE affords negligible local or systemic toxicity, and an ≈180-14 000-fold improved efficacy/toxicity ratio over currently used antiseptic agents. Further, CAGE penetrates deep into the dermis and treats pathogens located in deep skin layers as confirmed by the ability of CAGE in vivo to treat Propionibacterium acnes infection. In combination, the results clearly demonstrate CAGE holds promise as a transformative platform antiseptic agent for preventive as well as therapeutic applications. JF - Advanced healthcare materials AU - Zakrewsky, Michael AU - Banerjee, Amrita AU - Apte, Sanjana AU - Kern, Theresa L AU - Jones, Mattie R AU - Sesto, Rico E Del AU - Koppisch, Andrew T AU - Fox, David T AU - Mitragotri, Samir AD - Center for Bioengineering and Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, 93106, USA. ; Bioenergy and Biome Science Group, Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA. ; Department of Physical Sciences - Chemistry, Dixie State University, Saint George, UT, 84770, USA. ; Department of Chemistry and Biochemistry, Northern Arizona University, Flagstaff, AZ, 86011, USA. Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 1282 EP - 1289 VL - 5 IS - 11 KW - Index Medicus KW - infection prevention KW - antimicrobial resistance KW - drug delivery KW - beacterial infections KW - antiseptics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1795873611?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advanced+healthcare+materials&rft.atitle=Choline+and+Geranate+Deep+Eutectic+Solvent+as+a+Broad-Spectrum+Antiseptic+Agent+for+Preventive+and+Therapeutic+Applications.&rft.au=Zakrewsky%2C+Michael%3BBanerjee%2C+Amrita%3BApte%2C+Sanjana%3BKern%2C+Theresa+L%3BJones%2C+Mattie+R%3BSesto%2C+Rico+E+Del%3BKoppisch%2C+Andrew+T%3BFox%2C+David+T%3BMitragotri%2C+Samir&rft.aulast=Zakrewsky&rft.aufirst=Michael&rft.date=2016-06-01&rft.volume=5&rft.issue=11&rft.spage=1282&rft.isbn=&rft.btitle=&rft.title=Advanced+healthcare+materials&rft.issn=2192-2659&rft_id=info:doi/10.1002%2Fadhm.201600086 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-06-09 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1002/adhm.201600086 ER - TY - JOUR T1 - Understanding mutagenesis through delineation of mutational signatures in human cancer. AN - 1791328412; 27207657 AB - Each individual cell within a human body acquires a certain number of somatic mutations during a course of its lifetime. These mutations originate from a wide spectra of both endogenous and exogenous mutational processes that leave distinct patterns of mutations, termed mutational signatures, embedded within the genomes of all cells. In recent years, the vast amount of data produced by sequencing of cancer genomes was coupled with novel mathematical models and computational tools to generate the first comprehensive map of mutational signatures in human cancer. Up to date, >30 distinct mutational signatures have been identified, and etiologies have been proposed for many of them. This review provides a brief historical background on examination of mutational patterns in human cancer, summarizes the knowledge accumulated since introducing the concept of mutational signatures and discusses their future potential applications and perspectives within the field. JF - Carcinogenesis AU - Petljak, Mia AU - Alexandrov, Ludmil B AD - Theoretical Biology and Biophysics (T-6) and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA and University of New Mexico Comprehensive Cancer Center, Albuquerque, NM 87102, USA lba@lanl.gov. Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 531 EP - 540 VL - 37 IS - 6 KW - Index Medicus KW - Genome, Human KW - Humans KW - Mutation KW - Neoplasms -- genetics KW - Mutagenesis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1791328412?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Carcinogenesis&rft.atitle=Understanding+mutagenesis+through+delineation+of+mutational+signatures+in+human+cancer.&rft.au=Petljak%2C+Mia%3BAlexandrov%2C+Ludmil+B&rft.aulast=Petljak&rft.aufirst=Mia&rft.date=2016-06-01&rft.volume=37&rft.issue=6&rft.spage=531&rft.isbn=&rft.btitle=&rft.title=Carcinogenesis&rft.issn=1460-2180&rft_id=info:doi/10.1093%2Fcarcin%2Fbgw055 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2017-02-06 N1 - Date created - 2016-05-24 N1 - Date revised - 2017-02-18 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1093/carcin/bgw055 ER - TY - JOUR T1 - Influences and interactions of inundation, peat, and snow on active layer thickness AN - 1873350963; 2017-015188 AB - Active layer thickness (ALT), the uppermost layer of soil that thaws on an annual basis, is a direct control on the amount of organic carbon potentially available for decomposition and release to the atmosphere as carbon-rich Arctic permafrost soils thaw in a warming climate. We investigate how key site characteristics affect ALT using an integrated surface/subsurface permafrost thermal hydrology model. ALT is most sensitive to organic layer thickness followed by snow depth but is relatively insensitive to the amount of water on the landscape with other conditions held fixed. The weak ALT sensitivity to subsurface saturation suggests that changes in Arctic landscape hydrology may only have a minor effect on future ALT. However, surface inundation amplifies the sensitivities to the other parameters and under large snowpacks can trigger the formation of near-surface taliks. Abstract Copyright Published 2016. This article is a US Government work and is in the public domain in the United States of America. JF - Geophysical Research Letters AU - Atchley, Adam L AU - Coon, Ethan T AU - Painter, Scott L AU - Harp, Dylan R AU - Wilson, Cathy J Y1 - 2016/05/28/ PY - 2016 DA - 2016 May 28 SP - 5116 EP - 5123 PB - American Geophysical Union, Washington, DC VL - 43 IS - 10 SN - 0094-8276, 0094-8276 KW - United States KW - permafrost KW - degradation KW - atmospheric precipitation KW - simulation KW - environmental analysis KW - Barrow Alaska KW - air pollution KW - volatilization KW - water-rock interaction KW - carbon KW - snow KW - sediments KW - floods KW - thickness KW - organic carbon KW - taliks KW - gaseous phase KW - pollutants KW - pollution KW - thawing KW - models KW - peat KW - organic compounds KW - saturation KW - Alaska KW - active layer KW - 23:Geomorphology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350963?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Influences+and+interactions+of+inundation%2C+peat%2C+and+snow+on+active+layer+thickness&rft.au=Atchley%2C+Adam+L%3BCoon%2C+Ethan+T%3BPainter%2C+Scott+L%3BHarp%2C+Dylan+R%3BWilson%2C+Cathy+J&rft.aulast=Atchley&rft.aufirst=Adam&rft.date=2016-05-28&rft.volume=43&rft.issue=10&rft.spage=5116&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2016GL068550 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 60 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-03-02 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - active layer; air pollution; Alaska; atmospheric precipitation; Barrow Alaska; carbon; degradation; environmental analysis; floods; gaseous phase; models; organic carbon; organic compounds; peat; permafrost; pollutants; pollution; saturation; sediments; simulation; snow; taliks; thawing; thickness; United States; volatilization; water-rock interaction DO - http://dx.doi.org/10.1002/2016GL068550 ER - TY - JOUR T1 - Influences and interactions of inundation, peat, and snow on active layer thickness AN - 1832650845; 779552-56 AB - Active layer thickness (ALT), the uppermost layer of soil that thaws on an annual basis, is a direct control on the amount of organic carbon potentially available for decomposition and release to the atmosphere as carbon-rich Arctic permafrost soils thaw in a warming climate. We investigate how key site characteristics affect ALT using an integrated surface/subsurface permafrost thermal hydrology model. ALT is most sensitive to organic layer thickness followed by snow depth but is relatively insensitive to the amount of water on the landscape with other conditions held fixed. The weak ALT sensitivity to subsurface saturation suggests that changes in Arctic landscape hydrology may only have a minor effect on future ALT. However, surface inundation amplifies the sensitivities to the other parameters and under large snowpacks can trigger the formation of near-surface taliks. Abstract Copyright Published 2016. This article is a US Government work and is in the public domain in the United States of America. JF - Geophysical Research Letters AU - Atchley, Adam L AU - Coon, Ethan T AU - Painter, Scott L AU - Harp, Dylan R AU - Wilson, Cathy J Y1 - 2016/05/28/ PY - 2016 DA - 2016 May 28 SP - 5116 EP - 5123 PB - American Geophysical Union, Washington, DC VL - 43 IS - 10 SN - 0094-8276, 0094-8276 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832650845?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Influences+and+interactions+of+inundation%2C+peat%2C+and+snow+on+active+layer+thickness&rft.au=Atchley%2C+Adam+L%3BCoon%2C+Ethan+T%3BPainter%2C+Scott+L%3BHarp%2C+Dylan+R%3BWilson%2C+Cathy+J&rft.aulast=Atchley&rft.aufirst=Adam&rft.date=2016-05-28&rft.volume=43&rft.issue=10&rft.spage=5116&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1016%2Fj.compfluid.2013.12.021 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-01-24 N1 - CODEN - GPRLAJ DO - http://dx.doi.org/10.1002/2016GL068550 ER - TY - GEN T1 - Plastic Bags Might Kickstart The Carbon Capture Industry AN - 1787863283 JF - Breaking Energy AU - Richard S Middleton | Los Alamos National Laboratory Y1 - 2016/05/10/ PY - 2016 DA - 2016 May 10 CY - New York PB - SyndiGate Media Inc KW - Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1787863283?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aabitrade&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=Breaking+Energy&rft.atitle=Plastic+Bags+Might+Kickstart+The+Carbon+Capture+Industry&rft.au=Richard+S+Middleton+%3B+Los+Alamos+National+Laboratory&rft.aulast=Richard+S+Middleton+%7C+Los+Alamos+National+Laboratory&rft.aufirst=&rft.date=2016-05-10&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Breaking+Energy&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright © 2016 Breaking Media, Inc. All rights reserved. Provided by SyndiGate Media Inc. (Syndigate.info). N1 - Last updated - 2016-05-11 ER - TY - JOUR T1 - From documentation to prediction; raising the bar for thermokarst research AN - 1849300344; 2016-106456 JF - Hydrogeology Journal AU - Rowland, Joel C AU - Coon, Ethan T Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 645 EP - 648 PB - Springer, Berlin - Heidelberg VL - 24 IS - 3 SN - 1431-2174, 1431-2174 KW - United States KW - settling KW - permafrost KW - degradation KW - laser methods KW - geologic hazards KW - global change KW - freezing KW - climate change KW - SAR KW - carbon KW - arctic environment KW - global warming KW - soil mechanics KW - North Slope KW - cyclic processes KW - thermal properties KW - radar methods KW - prediction KW - thawing KW - geochemical cycle KW - models KW - detection KW - lidar methods KW - frost action KW - thermokarst KW - natural hazards KW - risk assessment KW - Alaska KW - InSAR KW - carbon cycle KW - landscapes KW - active layer KW - frozen ground KW - remote sensing KW - 23:Geomorphology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849300344?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=From+documentation+to+prediction%3B+raising+the+bar+for+thermokarst+research&rft.au=Rowland%2C+Joel+C%3BCoon%2C+Ethan+T&rft.aulast=Rowland&rft.aufirst=Joel&rft.date=2016-05-01&rft.volume=24&rft.issue=3&rft.spage=645&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-015-1331-5 L2 - http://www.springerlink.com/content/102028/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 40 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - active layer; Alaska; arctic environment; carbon; carbon cycle; climate change; cyclic processes; degradation; detection; freezing; frost action; frozen ground; geochemical cycle; geologic hazards; global change; global warming; InSAR; landscapes; laser methods; lidar methods; models; natural hazards; North Slope; permafrost; prediction; radar methods; remote sensing; risk assessment; SAR; settling; soil mechanics; thawing; thermal properties; thermokarst; United States DO - http://dx.doi.org/10.1007/s10040-015-1331-5 ER - TY - JOUR T1 - Preface; land subsidence processes AN - 1849299401; 2016-106449 JF - Hydrogeology Journal AU - Galloway, Devin L AU - Erkens, Gilles AU - Kuniansky, Eve L AU - Rowland, Joel C Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 547 EP - 550 PB - Springer, Berlin - Heidelberg VL - 24 IS - 3 SN - 1431-2174, 1431-2174 KW - permafrost KW - geologic hazards KW - collapse structures KW - waste water KW - karst hydrology KW - land subsidence KW - ground water KW - environmental management KW - sedimentary rocks KW - sediments KW - discharge KW - chemically precipitated rocks KW - human activity KW - solutes KW - solubility KW - evaporites KW - thawing KW - aquifers KW - models KW - water table KW - fluctuations KW - sinkholes KW - natural hazards KW - shallow aquifers KW - carbonate rocks KW - water resources KW - solution features KW - carbonates KW - land use KW - consolidation KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849299401?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=Preface%3B+land+subsidence+processes&rft.au=Galloway%2C+Devin+L%3BErkens%2C+Gilles%3BKuniansky%2C+Eve+L%3BRowland%2C+Joel+C&rft.aulast=Galloway&rft.aufirst=Devin&rft.date=2016-05-01&rft.volume=24&rft.issue=3&rft.spage=547&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-016-1386-y L2 - http://www.springerlink.com/content/102028/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - aquifers; carbonate rocks; carbonates; chemically precipitated rocks; collapse structures; consolidation; discharge; environmental management; evaporites; fluctuations; geologic hazards; ground water; human activity; karst hydrology; land subsidence; land use; models; natural hazards; permafrost; sedimentary rocks; sediments; shallow aquifers; sinkholes; solubility; solutes; solution features; thawing; waste water; water resources; water table DO - http://dx.doi.org/10.1007/s10040-016-1386-y ER - TY - JOUR T1 - Land subsidence processes AN - 1849298557; 2016-106448 JF - Hydrogeology Journal Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 547 EP - 747 PB - Springer, Berlin - Heidelberg VL - 24 IS - 3 SN - 1431-2174, 1431-2174 KW - hydrology KW - soil mechanics KW - geologic hazards KW - natural hazards KW - porous materials KW - land subsidence KW - water resources KW - 30:Engineering geology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849298557?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=Land+subsidence+processes&rft.au=&rft.aulast=&rft.aufirst=&rft.date=2016-05-01&rft.volume=24&rft.issue=3&rft.spage=547&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/ L2 - http://www.springerlink.com/content/102028/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Document feature - illus. N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - geologic hazards; hydrology; land subsidence; natural hazards; porous materials; soil mechanics; water resources ER - TY - JOUR T1 - Surface waves affect frontogenesis AN - 1819897251; 2016-081262 AB - This paper provides a detailed analysis of momentum, angular momentum, vorticity, and energy budgets of a submesoscale front undergoing frontogenesis driven by an upper-ocean, submesoscale eddy field in a Large Eddy Simulation (LES). The LES solves the wave-averaged, or Craik-Leibovich, equations in order to account for the Stokes forces that result from interactions between nonbreaking surface waves and currents, and resolves both submesoscale eddies and boundary layer turbulence down to 4.9 m X 4.9 m X 1.25 m grid scales. It is found that submesoscale frontogenesis differs from traditional frontogenesis theory due to four effects: Stokes forces, momentum and kinetic energy transfer from submesoscale eddies to frontal secondary circulations, resolved turbulent stresses, and unbalanced torque. In the energy, momentum, angular momentum, and vorticity budgets for the frontal overturning circulation, the Stokes shear force is a leading-order contributor, typically either the second or third largest source of frontal overturning. These effects violate hydrostatic and thermal wind balances during submesoscale frontogenesis. The effect of the Stokes shear force becomes stronger with increasing alignment of the front and Stokes shear and with a nondimensional scaling. The Stokes shear force and momentum transfer from submesoscale eddies significantly energize the frontal secondary circulation along with the buoyancy. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Suzuki, Nobuhiro AU - Fox-Kemper, Baylor AU - Hamlington, Peter E AU - van Roekel, Luke P Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 3597 EP - 3624 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 5 SN - 2169-9275, 2169-9275 KW - currents KW - ocean circulation KW - numerical models KW - mathematical models KW - vorticity KW - turbulence KW - energy balance KW - ocean currents KW - buoyancy KW - genesis KW - Criak-Leibovich equations KW - eddies KW - ocean waves KW - digital simulation KW - hydrodynamics KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819897251?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Surface+waves+affect+frontogenesis&rft.au=Suzuki%2C+Nobuhiro%3BFox-Kemper%2C+Baylor%3BHamlington%2C+Peter+E%3Bvan+Roekel%2C+Luke+P&rft.aulast=Suzuki&rft.aufirst=Nobuhiro&rft.date=2016-05-01&rft.volume=15&rft.issue=1&rft.spage=366&rft.isbn=&rft.btitle=&rft.title=BMC+Bioinformatics&rft.issn=14712105&rft_id=info:doi/10.1186%2Fs12859-014-0366-2 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 65 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - buoyancy; Criak-Leibovich equations; currents; digital simulation; eddies; energy balance; genesis; hydrodynamics; mathematical models; numerical models; ocean circulation; ocean currents; ocean waves; turbulence; vorticity DO - http://dx.doi.org/10.1002/2015JC011563 ER - TY - JOUR T1 - The potassic sedimentary rocks in Gale Crater, Mars, as seen by ChemCam on board Curiosity AN - 1803776486; 2016-063117 AB - The Mars Science Laboratory rover Curiosity encountered potassium-rich clastic sedimentary rocks at two sites in Gale Crater, the waypoints Cooperstown and Kimberley. These rocks include several distinct meters thick sedimentary outcrops ranging from fine sandstone to conglomerate, interpreted to record an ancient fluvial or fluvio-deltaic depositional system. From ChemCam Laser-Induced Breakdown Spectroscopy (LIBS) chemical analyses, this suite of sedimentary rocks has an overall mean K (sub 2) O abundance that is more than 5 times higher than that of the average Martian crust. The combined analysis of ChemCam data with stratigraphic and geographic locations reveals that the mean K (sub 2) O abundance increases upward through the stratigraphic section. Chemical analyses across each unit can be represented as mixtures of several distinct chemical components, i.e., mineral phases, including K-bearing minerals, mafic silicates, Fe-oxides, and Fe-hydroxide/oxyhydroxides. Possible K-bearing minerals include alkali feldspar (including anorthoclase and sanidine) and K-bearing phyllosilicate such as illite. Mixtures of different source rocks, including a potassium-rich rock located on the rim and walls of Gale Crater, are the likely origin of observed chemical variations within each unit. Physical sorting may have also played a role in the enrichment in K in the Kimberley formation. The occurrence of these potassic sedimentary rocks provides additional evidence for the chemical diversity of the crust exposed at Gale Crater. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Le Deit, Laetitia AU - Mangold, Nicolas AU - Forni, O AU - Cousin, A AU - Lasue, J AU - Schroeder, S AU - Wiens, R C AU - Sumner, D AU - Fabre, C AU - Stack, K M AU - Anderson, R B AU - Blaney, D AU - Clegg, S AU - Dromart, G AU - Fisk, M AU - Gasnault, Olivier AU - Grotzinger, J P AU - Gupta, S AU - Lanza, N AU - Le Mouelic, Stephane AU - Maurice, S AU - McLennan, S M AU - Meslin, P Y AU - Nachon, M AU - Newsom, H AU - Payre, V AU - Rapin, W AU - Rice, M AU - Sautter, V AU - Treiman, A H Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 784 EP - 804 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 5 SN - 2169-9097, 2169-9097 KW - silicates KW - chemical analysis KW - in situ KW - techniques KW - potassic composition KW - Mars KW - illite KW - iron hydroxides KW - Gale Crater KW - emission spectra KW - terrestrial planets KW - hydroxides KW - planets KW - sedimentary rocks KW - Curiosity Rover KW - Mars Science Laboratory KW - oxides KW - LIBS spectra KW - ChemCam KW - sheet silicates KW - spectra KW - instruments KW - crust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803776486?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=The+potassic+sedimentary+rocks+in+Gale+Crater%2C+Mars%2C+as+seen+by+ChemCam+on+board+Curiosity&rft.au=Le+Deit%2C+Laetitia%3BMangold%2C+Nicolas%3BForni%2C+O%3BCousin%2C+A%3BLasue%2C+J%3BSchroeder%2C+S%3BWiens%2C+R+C%3BSumner%2C+D%3BFabre%2C+C%3BStack%2C+K+M%3BAnderson%2C+R+B%3BBlaney%2C+D%3BClegg%2C+S%3BDromart%2C+G%3BFisk%2C+M%3BGasnault%2C+Olivier%3BGrotzinger%2C+J+P%3BGupta%2C+S%3BLanza%2C+N%3BLe+Mouelic%2C+Stephane%3BMaurice%2C+S%3BMcLennan%2C+S+M%3BMeslin%2C+P+Y%3BNachon%2C+M%3BNewsom%2C+H%3BPayre%2C+V%3BRapin%2C+W%3BRice%2C+M%3BSautter%2C+V%3BTreiman%2C+A+H&rft.aulast=Le+Deit&rft.aufirst=Laetitia&rft.date=2016-05-01&rft.volume=121&rft.issue=5&rft.spage=784&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2015JE004987 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 61 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-07-14 N1 - SubjectsTermNotLitGenreText - ChemCam; chemical analysis; crust; Curiosity Rover; emission spectra; Gale Crater; hydroxides; illite; in situ; instruments; iron hydroxides; LIBS spectra; Mars; Mars Science Laboratory; oxides; planets; potassic composition; sedimentary rocks; sheet silicates; silicates; spectra; techniques; terrestrial planets DO - http://dx.doi.org/10.1002/2015JE004987 ER - TY - JOUR T1 - Frequency, pressure, and strain dependence of nonlinear elasticity in Berea Sandstone AN - 1819895470; 2016-080702 AB - Acoustoelasticity measurements in a sample of room dry Berea sandstone are conducted at various loading frequencies to explore the transition between the quasi-static (f --> 0) and dynamic (few kilohertz) nonlinear elastic response. We carry out these measurements at multiple confining pressures and perform a multivariate regression analysis to quantify the dependence of the harmonic content on strain amplitude, frequency, and pressure. The modulus softening (equivalent to the harmonic at 0f) increases by a factor 2-3 over 3 orders of magnitude increase in frequency. Harmonics at 2f, 4f, and 6f exhibit similar behaviors. In contrast, the harmonic at 1f appears frequency independent. This result corroborates previous studies showing that the nonlinear elasticity of rocks can be described with a minimum of two physical mechanisms. This study provides quantitative data that describes the rate dependency of nonlinear elasticity. These findings can be used to improve theories relating the macroscopic elastic response to microstructural features. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Riviere, Jacques AU - Pimienta, Lucas AU - Scuderi, Marco AU - Candela, Thibault AU - Shokouhi, Parisa AU - Fortin, Jerome AU - Schubnel, Alexandre AU - Marone, Chris AU - Johnson, Paul A Y1 - 2016/04/16/ PY - 2016 DA - 2016 Apr 16 SP - 3226 EP - 3236 PB - American Geophysical Union, Washington, DC VL - 43 IS - 7 SN - 0094-8276, 0094-8276 KW - United States KW - experimental studies KW - elasticity KW - pressure KW - strain KW - Paleozoic KW - loading KW - elastic properties KW - stress KW - microstructure KW - Berea Sandstone KW - mechanism KW - rates KW - elastic waves KW - frequency KW - equations KW - elastic constants KW - rock mechanics KW - measurement KW - oscillations KW - velocity KW - confining pressure KW - amplitude KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819895470?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Frequency%2C+pressure%2C+and+strain+dependence+of+nonlinear+elasticity+in+Berea+Sandstone&rft.au=Riviere%2C+Jacques%3BPimienta%2C+Lucas%3BScuderi%2C+Marco%3BCandela%2C+Thibault%3BShokouhi%2C+Parisa%3BFortin%2C+Jerome%3BSchubnel%2C+Alexandre%3BMarone%2C+Chris%3BJohnson%2C+Paul+A&rft.aulast=Riviere&rft.aufirst=Jacques&rft.date=2016-04-16&rft.volume=43&rft.issue=7&rft.spage=3226&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2016GL068061 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 60 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-16 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - amplitude; Berea Sandstone; confining pressure; elastic constants; elastic properties; elastic waves; elasticity; equations; experimental studies; frequency; loading; measurement; mechanism; microstructure; oscillations; Paleozoic; pressure; rates; rock mechanics; strain; stress; United States; velocity DO - http://dx.doi.org/10.1002/2016GL068061 ER - TY - JOUR T1 - Volcanic lightning and plume behavior reveal evolving hazards during the April 2015 eruption of Calbuco Volcano, Chile AN - 1819894013; 2016-080715 AB - Soon after the onset of an eruption, model forecasts of ash dispersal are used to mitigate the hazards to aircraft, infrastructure, and communities downwind. However, it is a significant challenge to constrain the model inputs during an evolving eruption. Here we demonstrate that volcanic lightning may be used in tandem with satellite detection to recognize and quantify changes in eruption style and intensity. Using the eruption of Calbuco volcano in southern Chile on 22 and 23 April 2015, we investigate rates of umbrella cloud expansion from satellite observations, occurrence of lightning, and mapped characteristics of the fall deposits. Our remote sensing analysis gives a total erupted volume that is within uncertainty of the mapped volume (0.56 + or - 0.28 km (super 3) bulk). Observations and volcanic plume modeling further suggest that electrical activity was enhanced both by ice formation in the ash clouds >10 km above sea level and development of a low-level charge layer from ground-hugging currents. Abstract Copyright Published 2016. American Geophysical Union. This article is a US Government work and is in the public domain in the USA. JF - Geophysical Research Letters AU - van Eaton, Alexa R AU - Amigo, Alvaro AU - Bertin, Daniel AU - Mastin, Larry G AU - Giacosa, Raul E AU - Gonzalez, Jeronimo AU - Valderrama, Oscar AU - Fontijn, Karen AU - Behnke, Sonja A Y1 - 2016/04/16/ PY - 2016 DA - 2016 Apr 16 SP - 3563 EP - 3571 PB - American Geophysical Union, Washington, DC VL - 43 IS - 7 SN - 0094-8276, 0094-8276 KW - volcanic rocks KW - geophysical surveys KW - geologic hazards KW - one-dimensional models KW - igneous rocks KW - Chile KW - Calbuco KW - observations KW - quantitative analysis KW - thickness KW - volcanic ash KW - equations KW - measurement KW - models KW - pyroclastics KW - South America KW - lightning KW - detection KW - eruptions KW - natural hazards KW - volcanoes KW - surveys KW - electrical currents KW - remote sensing KW - 24:Quaternary geology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894013?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Review+of+Environment+and+Resources&rft.atitle=The+environmental+costs+and+benefits+of+fracking&rft.au=Jackson%2C+Robert+B%3BVengosh%2C+Avner%3BCarey%2C+J+William%3BDavies%2C+Richard+J%3BDarrah%2C+Thomas+H%3BO%27Sullivan%2C+Francis%3BPetron%2C+Gabrielle&rft.aulast=Jackson&rft.aufirst=Robert&rft.date=2014-01-01&rft.volume=39&rft.issue=&rft.spage=327&rft.isbn=&rft.btitle=&rft.title=Annual+Review+of+Environment+and+Resources&rft.issn=15435938&rft_id=info:doi/10.1146%2Fannurev-environ-031113-144051 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 49 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2016-09-16 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - Calbuco; Chile; detection; electrical currents; equations; eruptions; geologic hazards; geophysical surveys; igneous rocks; lightning; measurement; models; natural hazards; observations; one-dimensional models; pyroclastics; quantitative analysis; remote sensing; South America; surveys; thickness; volcanic ash; volcanic rocks; volcanoes DO - http://dx.doi.org/10.1002/2016GL068076 ER - TY - JOUR T1 - Uncertainty quantification and global sensitivity analysis of the Los Alamos sea ice model AN - 1819897539; 2016-078867 AB - Changes in the high-latitude climate system have the potential to affect global climate through feedbacks with the atmosphere and connections with midlatitudes. Sea ice and climate models used to understand these changes have uncertainties that need to be characterized and quantified. We present a quantitative way to assess uncertainty in complex computer models, which is a new approach in the analysis of sea ice models. We characterize parametric uncertainty in the Los Alamos sea ice model (CICE) in a standalone configuration and quantify the sensitivity of sea ice area, extent, and volume with respect to uncertainty in 39 individual model parameters. Unlike common sensitivity analyses conducted in previous studies where parameters are varied one at a time, this study uses a global variance-based approach in which Sobol' sequences are used to efficiently sample the full 39-dimensional parameter space. We implement a fast emulator of the sea ice model whose predictions of sea ice extent, area, and volume are used to compute the Sobol' sensitivity indices of the 39 parameters. Main effects and interactions among the most influential parameters are also estimated by a nonparametric regression technique based on generalized additive models. A ranking based on the sensitivity indices indicates that model predictions are most sensitive to snow parameters such as snow conductivity and grain size, and the drainage of melt ponds. It is recommended that research be prioritized toward more accurately determining these most influential parameter values by observational studies or by improving parameterizations in the sea ice model. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Urrego-Blanco, Jorge R AU - Urban, Nathan M AU - Hunke, Elizabeth C AU - Turner, Adrian K AU - Jeffery, Nicole Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 2709 EP - 2732 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 4 SN - 2169-9275, 2169-9275 KW - Community Ice Code model KW - numerical models KW - sea ice KW - global KW - quantitative analysis KW - sensitivity analysis KW - ice KW - digital simulation KW - accuracy KW - world ocean KW - uncertainty KW - climate KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819897539?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Uncertainty+quantification+and+global+sensitivity+analysis+of+the+Los+Alamos+sea+ice+model&rft.au=Urrego-Blanco%2C+Jorge+R%3BUrban%2C+Nathan+M%3BHunke%2C+Elizabeth+C%3BTurner%2C+Adrian+K%3BJeffery%2C+Nicole&rft.aulast=Urrego-Blanco&rft.aufirst=Jorge&rft.date=2016-04-01&rft.volume=121&rft.issue=4&rft.spage=2709&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2015JC011558 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 88 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - accuracy; climate; Community Ice Code model; digital simulation; global; ice; numerical models; quantitative analysis; sea ice; sensitivity analysis; uncertainty; world ocean DO - http://dx.doi.org/10.1002/2015JC011558 ER - TY - JOUR T1 - Reflection imaging of the Moon's interior using deep-moonquake seismic interferometry AN - 1803776453; 2016-063113 AB - The internal structure of the Moon has been investigated over many years using a variety of seismic methods, such as travel time analysis, receiver functions, and tomography. Here we propose to apply body-wave seismic interferometry to deep moonquakes in order to retrieve zero-offset reflection responses (and thus images) beneath the Apollo stations on the nearside of the Moon from virtual sources colocated with the stations. This method is called deep-moonquake seismic interferometry (DMSI). Our results show a laterally coherent acoustic boundary around 50 km depth beneath all four Apollo stations. We interpret this boundary as the lunar seismic Moho. This depth agrees with Japan Aerospace Exploration Agency's (JAXA) SELenological and Engineering Explorer (SELENE) result and previous travel time analysis at the Apollo 12/14 sites. The deeper part of the image we obtain from DMSI shows laterally incoherent structures. Such lateral inhomogeneity we interpret as representing a zone characterized by strong scattering and constant apparent seismic velocity at our resolution scale (0.2-2.0 Hz). Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Nishitsuji, Yohei AU - Rowe, C A AU - Wapenaar, Kees AU - Draganov, Deyan Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 695 EP - 713 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 4 SN - 2169-9097, 2169-9097 KW - tomography KW - receiver functions KW - imagery KW - moonquakes KW - Moon KW - geophysical methods KW - reflection methods KW - Apollo Program KW - interferometry KW - depth KW - seismic methods KW - discontinuities KW - planetary interiors KW - 04:Extraterrestrial geology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803776453?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Reflection+imaging+of+the+Moon%27s+interior+using+deep-moonquake+seismic+interferometry&rft.au=Nishitsuji%2C+Yohei%3BRowe%2C+C+A%3BWapenaar%2C+Kees%3BDraganov%2C+Deyan&rft.aulast=Nishitsuji&rft.aufirst=Yohei&rft.date=2016-04-01&rft.volume=121&rft.issue=4&rft.spage=695&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2015JE004975 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 60 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-07-14 N1 - SubjectsTermNotLitGenreText - Apollo Program; depth; discontinuities; geophysical methods; imagery; interferometry; Moon; moonquakes; planetary interiors; receiver functions; reflection methods; seismic methods; tomography DO - http://dx.doi.org/10.1002/2015JE004975 ER - TY - JOUR T1 - Water quality and hydrogeochemistry of a basin and range watershed in a semi-arid region of northern New Mexico AN - 1802205207; PQ0002927490 AB - Hundreds of domestic wells in northern New Mexico, have concentrations of U, As, and NO sub(3) super(-) that exceed the Environmental Protection Agency's (EPA) maximum contaminant level (MCL) for drinking water consumption. As part of a case study in groundwater quality, we collected groundwater samples from 749 domestic wells throughout the eastern half of the Espanola Basin. All water samples were analyzed for major ions, trace metals, and alkalinity. Selected samples were also analyzed for stable isotopes of O, H, and N. Of the wells we measured, 15, 173, and 99 had respective NO sub(3) super(-), U, and As concentrations that exceeded the EPA's MCL. Total dissolved solids (TDS), U, and HCO sub(3) super(-) were elevated in the Sangre de Cristo mountain block and around the town of Nambe. Our findings suggest that roll-front U deposits and devitrification of volcanic ash result in elevated U near Nambe, while weathering of granitic rocks accounts for high U in the mountain block. Arsenic concentrations were high in much of the study area with the exception of the Santa Fe metro region and the mountain block. Elevated As concentrations can be explained by devitrification of volcanic ash, anion exchange with clays, and mixing with hydrothermal fluids. In wells with high NO sub(3) super(-) concentrations, analysis of N isotopes are consistent with contamination from domestic wastewater effluent. Our findings suggest that the geochemistry of the region is largely influenced by local geology while groundwater contamination from domestic water treatment and wastewater effluent is an emerging issue. JF - Environmental Earth Sciences AU - Linhoff, Benjamin AU - Longmire, Patrick AU - Rearick, Michael AU - McQuillan, Denis AU - Perkins, George AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA, blinhoff@whoi.edu Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 1 EP - 13 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 75 IS - 8 SN - 1866-6280, 1866-6280 KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - USA, New Mexico KW - Isotopes KW - Clay KW - Groundwater quality KW - Ash KW - Geochemistry KW - Volcanoes KW - Basins KW - Watersheds KW - Effluents KW - Water quality KW - Towns KW - Environmental protection KW - Mountains KW - EPA KW - Volcanic activity KW - Water consumption KW - Water wells KW - Groundwater pollution KW - Weathering KW - Drinking water KW - M2 556.38:Groundwater Basins (556.38) KW - P 2000:FRESHWATER POLLUTION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1802205207?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Earth+Sciences&rft.atitle=Water+quality+and+hydrogeochemistry+of+a+basin+and+range+watershed+in+a+semi-arid+region+of+northern+New+Mexico&rft.au=Linhoff%2C+Benjamin%3BLongmire%2C+Patrick%3BRearick%2C+Michael%3BMcQuillan%2C+Denis%3BPerkins%2C+George&rft.aulast=Linhoff&rft.aufirst=Benjamin&rft.date=2016-04-01&rft.volume=75&rft.issue=8&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Environmental+Earth+Sciences&rft.issn=18666280&rft_id=info:doi/10.1007%2Fs12665-015-5179-8 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-04-01 N1 - Number of references - 27 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Groundwater quality; Volcanic activity; Water consumption; Geochemistry; Groundwater pollution; Weathering; Water quality; Environmental protection; Isotopes; Clay; Ash; Volcanoes; Basins; Effluents; Watersheds; Towns; Mountains; EPA; Water wells; Drinking water; USA, New Mexico DO - http://dx.doi.org/10.1007/s12665-015-5179-8 ER - TY - JOUR T1 - Impact on Quality Activities of Measurement Systems Meeting an L:1 Rule AN - 1800497719; PQ0002835016 AB - This article considers the impact of a measurement system that meets an L:1 rule on various quality activities. These activities include inspection, acceptance sampling, and control charting. A measurement system that meets a 10:1 rule performs much better than one that meets a 4:1 rule. R code is provided so that the practitioner can evaluate these activities to his or her particular situation. JF - Quality and Reliability Engineering International AU - Hamada AU - Burkhardt, J H AD - Statistical Sciences, Los Alamos National Laboratory, Los Alamos, 87545, NM, USA. Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 1021 EP - 1028 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 32 IS - 3 SN - 0748-8017, 0748-8017 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN) KW - Reliability engineering KW - Acceptance KW - Meetings KW - Sampling KW - Inspection UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800497719?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Quality+and+Reliability+Engineering+International&rft.atitle=Impact+on+Quality+Activities+of+Measurement+Systems+Meeting+an+L%3A1+Rule&rft.au=Hamada%3BBurkhardt%2C+J+H&rft.aulast=Hamada&rft.aufirst=&rft.date=2016-04-01&rft.volume=32&rft.issue=3&rft.spage=1021&rft.isbn=&rft.btitle=&rft.title=Quality+and+Reliability+Engineering+International&rft.issn=07488017&rft_id=info:doi/10.1002%2Fqre.1811 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Last updated - 2016-06-30 DO - http://dx.doi.org/10.1002/qre.1811 ER - TY - JOUR T1 - Pan-Arctic ice-wedge degradation in warming permafrost and its influence on tundra hydrology AN - 1800390937; 2016-056550 JF - Nature Geoscience AU - Liljedahl, Anna K AU - Boike, Julia AU - Daanen, Ronald P AU - Fedorov, Alexander N AU - Frost, Gerald V AU - Grosse, Guido AU - Hinzman, Larry D AU - Iijma, Yoshihiro AU - Jorgenson, Janet C AU - Matveyeva, Nadya AU - Necsoiu, Marius AU - Raynolds, Martha K AU - Romanovsky, Vladimir E AU - Schulla, Jorg AU - Tape, Ken D AU - Walker, Donald A AU - Wilson, Cathy J AU - Yabuki, Hironori AU - Zona, Donatella Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 312 EP - 318 PB - Nature Publishing Group, London VL - 9 IS - 4 SN - 1752-0894, 1752-0894 KW - hydrology KW - permafrost KW - degradation KW - tundra KW - Arctic region KW - periglacial features KW - ice wedges KW - thawing KW - temperature KW - melting KW - cracks KW - wetlands KW - glacial geology KW - landscapes KW - polygons KW - climate KW - 23:Geomorphology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800390937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+Geoscience&rft.atitle=Pan-Arctic+ice-wedge+degradation+in+warming+permafrost+and+its+influence+on+tundra+hydrology&rft.au=Liljedahl%2C+Anna+K%3BBoike%2C+Julia%3BDaanen%2C+Ronald+P%3BFedorov%2C+Alexander+N%3BFrost%2C+Gerald+V%3BGrosse%2C+Guido%3BHinzman%2C+Larry+D%3BIijma%2C+Yoshihiro%3BJorgenson%2C+Janet+C%3BMatveyeva%2C+Nadya%3BNecsoiu%2C+Marius%3BRaynolds%2C+Martha+K%3BRomanovsky%2C+Vladimir+E%3BSchulla%2C+Jorg%3BTape%2C+Ken+D%3BWalker%2C+Donald+A%3BWilson%2C+Cathy+J%3BYabuki%2C+Hironori%3BZona%2C+Donatella&rft.aulast=Liljedahl&rft.aufirst=Anna&rft.date=2016-04-01&rft.volume=9&rft.issue=4&rft.spage=312&rft.isbn=&rft.btitle=&rft.title=Nature+Geoscience&rft.issn=17520894&rft_id=info:doi/10.1038%2FNGEO2674 L2 - http://www.nature.com/ngeo/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 42 N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2016-06-30 N1 - SubjectsTermNotLitGenreText - Arctic region; climate; cracks; degradation; glacial geology; hydrology; ice wedges; landscapes; melting; periglacial features; permafrost; polygons; temperature; thawing; tundra; wetlands DO - http://dx.doi.org/10.1038/NGEO2674 ER - TY - JOUR T1 - Threshold magnitudes for a multichannel correlation detector in background seismicity AN - 1797543966; 2016-054074 AB - Colocated explosive sources often produce correlated seismic waveforms. Multichannel correlation detectors identify these signals by scanning template waveforms recorded from known reference events against target data to find similar waveforms. This screening problem is challenged at thresholds required to monitor smaller explosions, often because nontarget signals falsely trigger such detectors. Therefore, it is generally unclear what thresholds will reliably identify a target explosion while screening nontarget background seismicity. Here, we estimate threshold magnitudes for hypothetical explosions located at the North Korean nuclear test site over 6 months of 2010, by processing International Monitoring System (IMS) array data with a multichannel waveform correlation detector. Our method (1) accounts for low-amplitude background seismicity that falsely triggers correlation detectors but is unidentifiable with conventional power beams, (2) adapts to diurnally variable noise levels, and (3) uses source-receiver reciprocity concepts to estimate thresholds for explosions spatially separated from the template source. We find that underground explosions with body-wave magnitudes m (sub b) approximately 1.66 are detectable at the IMS array USRK with probability 0.99, when using template waveforms consisting only of Pwaves, without false alarms. We conservatively find that these thresholds also increase by up to a magnitude unit for sources located 4 km or more from the 12 February 2013 announced nuclear test. JF - Bulletin of the Seismological Society of America AU - Carmichael, Joshua D AU - Hartse, Hans Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 478 EP - 498 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 2 SN - 0037-1106, 0037-1106 KW - body waves KW - technology KW - monitoring KW - explosions KW - magnitude KW - elastic waves KW - signals KW - noise KW - International Monitoring System KW - seismicity KW - seismic waves KW - algorithms KW - nuclear explosions KW - earthquakes KW - instruments KW - arrays KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797543966?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Threshold+magnitudes+for+a+multichannel+correlation+detector+in+background+seismicity&rft.au=Carmichael%2C+Joshua+D%3BHartse%2C+Hans&rft.aulast=Carmichael&rft.aufirst=Joshua&rft.date=2016-04-01&rft.volume=106&rft.issue=2&rft.spage=478&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150191 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 50 N1 - PubXState - CA N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-06-17 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; arrays; body waves; earthquakes; elastic waves; explosions; instruments; International Monitoring System; magnitude; monitoring; noise; nuclear explosions; seismic waves; seismicity; signals; technology DO - http://dx.doi.org/10.1785/0120150191 ER - TY - JOUR T1 - The soil water characteristic as new class of closed form parametric expressions for the flow duration curve AN - 1797538228; 2016-051238 AB - The flow duration curve is a signature catchment characteristic that depicts graphically the relationship between the exceedance probability of streamflow and its magnitude. This curve is relatively easy to create and interpret, and is used widely for hydrologic analysis, water quality management, and the design of hydroelectric power plants (among others). Several mathematical expressions have been proposed to mimic the FDC. Yet, these efforts have not been particularly successful, in large part because available functions are not flexible enough to portray accurately the functional shape of the FDC for a large range of catchments and contrasting hydrologic behaviors. Here, we extend the work of Vrugt and Sadegh (2013) and introduce several commonly used models of the soil water characteristic as new class of closed-form parametric expressions for the flow duration curve. These soil water retention functions are relatively simple to use, contain between two to three parameters, and mimic closely the empirical FDCs of 430 catchments of the MOPEX data set. We then relate the calibrated parameter values of these models to physical and climatological characteristics of the watershed using multivariate linear regression analysis, and evaluate the regionalization potential of our proposed models against those of the literature. If quality of fit is of main importance then the 3-parameter van Genuchten model is preferred, whereas the 2-parameter lognormal, 3-parameter GEV and generalized Pareto models show greater promise for regionalization. Abstract Copyright (2016) Elsevier, B.V. JF - Journal of Hydrology AU - Sadegh, M AU - Vrugt, J A AU - Gupta, H V AU - Xu, C Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 438 EP - 456 PB - Elsevier, Amsterdam VL - 535 SN - 0022-1694, 0022-1694 KW - soils KW - water quality KW - van Genuchten model KW - Pareto model KW - flow duration curve KW - statistical analysis KW - characterization KW - water management KW - MOPEX KW - hydroelectric energy KW - ground water KW - models KW - streamflow KW - multivariate analysis KW - regional KW - movement KW - mathematical methods KW - retention KW - model paraemeter estimation experiment KW - drainage basins KW - water content KW - probability KW - water resources KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538228?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology&rft.atitle=The+soil+water+characteristic+as+new+class+of+closed+form+parametric+expressions+for+the+flow+duration+curve&rft.au=Dromart%2C+Gilles%3BMaurice%2C+Sylvestre%3BSaccoccio%2C+Muriel%3BWiens%2C+Roger%3BGellert%2C+Ralf%3BAnonymous&rft.aulast=Dromart&rft.aufirst=Gilles&rft.date=2014-01-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts%3A+Annual+Meeting+-+American+Association+of+Petroleum+Geologists&rft.issn=&rft_id=info:doi/ L2 - http://www.sciencedirect.com/science/journal/00221694 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 145 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2016-06-17 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - characterization; drainage basins; flow duration curve; ground water; hydroelectric energy; mathematical methods; model paraemeter estimation experiment; models; MOPEX; movement; multivariate analysis; Pareto model; probability; regional; retention; soils; statistical analysis; streamflow; van Genuchten model; water content; water management; water quality; water resources DO - http://dx.doi.org/10.1016/j.jhydrol.2016.01.027 ER - TY - JOUR T1 - Generalization of the lightning electromagnetic equations of Uman, McLain, and Krider based on Jefimenko equations AN - 1787978449; PQ0002975312 AB - The fundamental electromagnetic equations used by lightning researchers were introduced in a seminal paper by Uman, McLain, and Krider in 1975. However, these equations were derived for an infinitely thin, one-dimensional source current, and not for a general three-dimensional current distribution. In this paper, we introduce a corresponding pair of generalized equations that are determined from a three-dimensional, time-dependent current density distribution based on Jefimenko's original electric and magnetic equations. To do this, we derive the Jefimenko electric field equation into a new form that depends only on the time-dependent current density similar to that of Uman, McLain, and Krider, rather than on both the charge and current densities in its original form. The original Jefimenko magnetic field equation depends only on current, so no further derivation is needed. We show that the equations of Uman, McLain, and Krider can be readily obtained from the generalized equations if a one-dimensional source current is considered. For the purpose of practical applications, we discuss computational implementation of the new equations and present electric field calculations for a three-dimensional, conical-shape discharge. Key Points * Generalized lightning EM equations * EM equations based on time-dependent, 3-D current density * New form of Jefimenko electric field equation JF - Journal of Geophysical Research: Atmospheres AU - Shao, Xuan-Min AD - Space and Remote Sensing Group, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 3363 EP - 3371 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 121 IS - 7 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Magnetic fields KW - Geographical distribution KW - Mathematical models KW - Lightning KW - Density KW - Electric fields KW - Electric Fields KW - Electric field KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 0810:General KW - M2 551.5:General (551.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1787978449?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Atmospheres&rft.atitle=Generalization+of+the+lightning+electromagnetic+equations+of+Uman%2C+McLain%2C+and+Krider+based+on+Jefimenko+equations&rft.au=Shao%2C+Xuan-Min&rft.aulast=Shao&rft.aufirst=Xuan-Min&rft.date=2016-04-01&rft.volume=121&rft.issue=7&rft.spage=3363&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2015JD024717 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Magnetic fields; Geographical distribution; Mathematical models; Lightning; Electric fields; Electric field; Density; Electric Fields DO - http://dx.doi.org/10.1002/2015JD024717 ER - TY - JOUR T1 - Managing complexity in simulations of land surface and near-surface processes AN - 1780529722; PQ0002666093 AB - Increasing computing power and the growing role of simulation in Earth systems science have led to an increase in the number and complexity of processes in modern simulators. We present a multiphysics framework that specifies interfaces for coupled processes and automates weak and strong coupling strategies to manage this complexity. Process management is enabled by viewing the system of equations as a tree, where individual equations are associated with leaf nodes and coupling strategies with internal nodes. A dynamically generated dependency graph connects a variable to its dependencies, streamlining and automating model evaluation, easing model development, and ensuring models are modular and flexible. Additionally, the dependency graph is used to ensure that data requirements are consistent between all processes in a given simulation. Here we discuss the design and implementation of these concepts within the Arcos framework, and demonstrate their use for verification testing and hypothesis evaluation in numerical experiments. JF - Environmental Modelling & Software AU - Coon, Ethan T AU - David Moulton, J AU - Painter, Scott L AD - Computational Earth Sciences, Los Alamos National Laboratory, USA Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 134 EP - 149 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 78 SN - 1364-8152, 1364-8152 KW - Environmental Engineering Abstracts (EN); Computer and Information Systems Abstracts (CI); CSA / ASCE Civil Engineering Abstracts (CE) KW - Multiphysics KW - Framework KW - Directed acyclic graph KW - Land surface modeling KW - Thermal hydrology KW - Joining KW - Mathematical models KW - Computer simulation KW - Complexity KW - Dynamical systems KW - Strategy KW - Graphs KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780529722?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Modelling+%26+Software&rft.atitle=Managing+complexity+in+simulations+of+land+surface+and+near-surface+processes&rft.au=Coon%2C+Ethan+T%3BDavid+Moulton%2C+J%3BPainter%2C+Scott+L&rft.aulast=Coon&rft.aufirst=Ethan&rft.date=2016-04-01&rft.volume=78&rft.issue=&rft.spage=134&rft.isbn=&rft.btitle=&rft.title=Environmental+Modelling+%26+Software&rft.issn=13648152&rft_id=info:doi/10.1016%2Fj.envsoft.2015.12.017 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-06-01 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1016/j.envsoft.2015.12.017 ER - TY - JOUR T1 - Chemical evidence for differentiation, evaporation and recondensation from silicate clasts in Gujba AN - 1789747755; 2016-045232 AB - The silicate and metal clasts in CB chondrites have been inferred to form as condensates from an impact-generated vapor plume between a metal-rich body and a silicate body. A detailed study of the condensation of impact-generated vapor plumes showed that the range of CB silicate clast compositions could not be successfully explained without invoking a chemically differentiated target. Here, we report the most comprehensive elemental study yet performed on CB silicates with 32 silicate clasts from nine slices of Gujba analyzed by laser ablation inductively coupled plasma mass spectrometry for 53 elements. Like in other studies of CBs, the silicate clasts are either barred olivine (BO) or cryptocrystalline (CC) in texture. In major elements, the Gujba silicate clasts ranged from chondritic to refractory enriched. Refractory element abundances ranged from 2 to 10 X CI, with notable anomalies in Ba, Ce, Eu, and U abundances. The two most refractory-enriched BO clasts exhibited negative Ce anomalies and were depleted in U relative to Th, characteristic of volatilization residues, while other BO clasts and the CC clasts exhibited positive Ce anomalies with excess U (1-3 X CI), and Ba (1-6 X CI) anomalies indicating re-condensation of ultra-refractory element depleted vapor. The Rare Earth Elements (REE) also exhibit light REE (LREE) enrichment or depletion in several clasts with a range of (La/Sm) (sub CI) of 0.9-1.8. This variation in the LREE is essentially impossible to accomplish by processes involving vapor-liquid or vapor-solid exchange of REE, and appears to have been inherited from a differentiated target. The most distinctive evidence for inherited chemical differentiation is observed in highly refractory element (Sc, Zr, Nb, Hf, Ta, Th) systematics. The Gujba clasts exhibit fractionations in Nb/Ta that correlate positively with Zr/Hf and span the range known from lunar and Martian basalts, and exceed the range in Zr/Hf variation known from eucrites. Variations of highly incompatible refractory elements (e.g., Th) against less incompatible elements (e.g., Zr, Sr, Sc) are not chondritic, but exhibit distinctly higher Th abundances requiring a differentiated crust to be admixed with depleted mantle in ratios that are biased to higher crust/mantle ratios than in a chondritic body. The possibility that these variations are due to admixture of refractory inclusion-debris into normal chondritic matter is raised but cannot be definitively tested because existing "bulk" analyses of CAIs carry artifacts of unrepresentative sampling. The inferences drawn from the compositions of Gujba silicate clasts, here, complement what has been inferred from the compositions of metallic clasts, but provide surprisingly detailed insight into the structure of the target. Evidence that metal and silicate in CB chondrites both formed from impact-generated vapor plumes, taken together with recent work on metallic nodules in E chondrites, and on ordinary chondrites, indicates that chondrule formation occurs by this mechanism quite widely. However, the nature of the impact on the CB body is quite different than the popular conceptions of impact of partially or wholly molten chondritic bodies and the younger (5 Ma) age of CB chondrules is consistent with origin in a disk with more evolved targets and impactors gravitationally perturbed by nascent planets. Abstract Copyright (2016) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Oulton, Jonathan AU - Humayun, Munir AU - Fedkin, Alexei AU - Grossman, Lawrence Y1 - 2016/03/15/ PY - 2016 DA - 2016 Mar 15 SP - 254 EP - 274 PB - Elsevier, New York, NY VL - 177 SN - 0016-7037, 0016-7037 KW - silicates KW - laser methods KW - Gujba Meteorite KW - isotopes KW - mass spectra KW - cerium KW - meteorites KW - major elements KW - geochemical anomalies KW - spectra KW - rare earths KW - trace elements KW - chemical composition KW - chemical ratios KW - condensation KW - textures KW - differentiation KW - laser ablation KW - electron microscopy data KW - cosmochemistry KW - clasts KW - ICP mass spectra KW - evaporation KW - metals KW - SEM data KW - backscattering KW - 05B:Petrology of meteorites and tektites KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789747755?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Chemical+evidence+for+differentiation%2C+evaporation+and+recondensation+from+silicate+clasts+in+Gujba&rft.au=Oulton%2C+Jonathan%3BHumayun%2C+Munir%3BFedkin%2C+Alexei%3BGrossman%2C+Lawrence&rft.aulast=Oulton&rft.aufirst=Jonathan&rft.date=2016-03-15&rft.volume=177&rft.issue=&rft.spage=254&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2016.01.008 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 86 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-05-19 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - backscattering; cerium; chemical composition; chemical ratios; clasts; condensation; cosmochemistry; differentiation; electron microscopy data; evaporation; geochemical anomalies; Gujba Meteorite; ICP mass spectra; isotopes; laser ablation; laser methods; major elements; mass spectra; metals; meteorites; rare earths; SEM data; silicates; spectra; textures; trace elements DO - http://dx.doi.org/10.1016/j.gca.2016.01.008 ER - TY - JOUR T1 - Photochemical changes in water accommodated fractions of MC252 and surrogate oil created during solar exposure as determined by FT-ICR MS. AN - 1774530067; 26774346 AB - To determine effects of photochemical weathering of petroleum, surrogate and Macondo (MC252) crude oils were exposed to solar radiation during the formation of Water Accommodated Fractions (WAFs) in sterile seawater. Samples were incubated in either unfiltered sunlight, with ultraviolet radiation blocked (Photosynthetically Active Radiation [PAR] only), or in darkness. WAFs were collected at two time points over the course of a week. Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) analyses of water soluble species formed during exposure to sunlight were compared for the different treatments. Photochemical alterations resulted in differences in compound class distributions. In general, surrogate oil was photo-oxidized across a wider carbon number range compared to MC252. While photochemical differences were observed between MC252 and surrogate oils, microbial production in seawater responded similarly to both WAFs from both types of oils with the majority of the inhibition resulting from oil exposure to visible light. JF - Marine pollution bulletin AU - Vaughan, Pamela P AU - Wilson, Tashiema AU - Kamerman, Rebecca AU - Hagy, Melissa E AU - McKenna, Amy AU - Chen, Huan AU - Jeffrey, Wade H AD - Department of Chemistry, University of West Florida, 11000 University Parkway, Pensacola, FL 32514, United States. ; Center for Environmental Diagnostics and Bioremediation, University of West Florida, 11000 University Parkway, Pensacola, FL 32514, United States. ; National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Dr., Tallahassee, FL 32310-3706, United States. Y1 - 2016/03/15/ PY - 2016 DA - 2016 Mar 15 SP - 262 EP - 268 VL - 104 IS - 1-2 KW - Water Pollutants, Chemical KW - 0 KW - Index Medicus KW - Photochemistry KW - Petroleum KW - FT-ICR MS KW - Weathering KW - Toxicity KW - Oil spill KW - Seawater -- chemistry KW - Oxidation-Reduction KW - Spectroscopy, Fourier Transform Infrared KW - Mass Spectrometry KW - Photolysis KW - Ultraviolet Rays KW - Petroleum Pollution KW - Sunlight KW - Water Pollutants, Chemical -- radiation effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1774530067?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Marine+pollution+bulletin&rft.atitle=Photochemical+changes+in+water+accommodated+fractions+of+MC252+and+surrogate+oil+created+during+solar+exposure+as+determined+by+FT-ICR+MS.&rft.au=Vaughan%2C+Pamela+P%3BWilson%2C+Tashiema%3BKamerman%2C+Rebecca%3BHagy%2C+Melissa+E%3BMcKenna%2C+Amy%3BChen%2C+Huan%3BJeffrey%2C+Wade+H&rft.aulast=Vaughan&rft.aufirst=Pamela&rft.date=2016-03-15&rft.volume=104&rft.issue=1-2&rft.spage=262&rft.isbn=&rft.btitle=&rft.title=Marine+pollution+bulletin&rft.issn=1879-3363&rft_id=info:doi/10.1016%2Fj.marpolbul.2016.01.012 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-12-15 N1 - Date created - 2016-03-18 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.marpolbul.2016.01.012 ER - TY - JOUR T1 - Role of natural organic matter on iodine and (super 239,240) Pu distribution and mobility in environmental samples from the northwestern Fukushima Prefecture, Japan AN - 1849306856; 2016-110162 AB - In order to assess how environmental factors are affecting the distribution and migration of radioiodine and plutonium that were emitted from the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident, we quantified iodine and (super 239,240) Pu concentration changes in soil samples with different land uses (urban, paddy, deciduous forest and coniferous forest), as well as iodine speciation in surface water and rainwater. Sampling locations were 53-63 km northwest of the FDNPP within a 75-km radius, in close proximity of each other. A ranking of the land uses by their surface soil ( deciduous forest > urban > paddy, and (super 239,240) Pu concentrations ranked as deciduous forest > coniferous forest > paddy > or = urban. Both were quite distinct from that of (super 134) Cs and (super 137) Cs: urban > coniferous forest > deciduous forest > paddy, indicating differences in their sources, deposition phases, and biogeochemical behavior in these soil systems. Although stable (super 127) I might not have fully equilibrated with Fukushima-derived (super 129) I, it likely still works as a proxy for the long-term fate of (super 129) I. Surficial soil (super 127) I content was well correlated to soil organic matter (SOM) content, regardless of land use type, suggesting that SOM might be an important factor affecting iodine biogeochemistry. Other soil chemical properties, such as Eh and pH, had strong correlations to soil (super 127) I content, but only within a given land use (e.g., within urban soils). Organic carbon (OC) concentrations and Eh were positively, and pH was negatively correlated to (super 127) I concentrations in surface water and rain samples. It is also noticeable that (super 127) I in the wet deposition was concentrated in both the deciduous and coniferous forest throughfall and stemfall water, respectively, comparing to the bulk rainwater. Further, both forest throughfall and stemflow water consisted exclusively of organo-iodine, suggesting all inorganic iodine in the original bulk deposition ( approximately 28.6% of total iodine) have been completely converted to organo-iodine. Fukushima-derived (super 239,240) Pu was detectable at a distance approximately 61 km away, NW of FDNPP. However, it is confined to the litter layer, even three years after the FDNPP accident-derived emissions. Plutonium-239,240 activities were significantly correlated with soil OC and nitrogen contents, indicating Pu may be associated with nitrogen-containing SOM, similar to what has been observed at other locations in the United States. Together, these finding suggest that natural organic matter (NOM) plays a key role in affecting the fate and transport of I and Pu and may warrant greater consideration for predicting long-term stewardship of contaminated areas and evaluating various remediation options in Japan. Abstract Copyright (2016) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Xu, Chen AU - Zhang, Saijin AU - Sugiyama, Yuko AU - Ohte, Nobuhito AU - Ho, Yi-Fang AU - Fujitake, Nobuhide AU - Kaplan, Daniel I AU - Yeager, Chris M AU - Schwehr, Kathleen AU - Santschi, Peter H Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 156 EP - 166 PB - Elsevier, Oxford VL - 153 SN - 0265-931X, 0265-931X KW - Pu-240/Pu-239 KW - forest soils KW - Far East KW - isotopes KW - plutonium KW - halogens KW - mass spectra KW - vegetation KW - environmental analysis KW - nitrogen KW - Fukushima nuclear accident KW - iodine KW - radioactive isotopes KW - I-129 KW - cesium KW - spectra KW - Asia KW - fallout KW - pH KW - Eh KW - soils KW - Fukushima Japan KW - pollutants KW - isotope ratios KW - alkali metals KW - pollution KW - migration of elements KW - stemflow KW - ICP mass spectra KW - organic compounds KW - Cs-137 KW - Oguni Forest KW - deposition KW - soil pollution KW - metals KW - mobilization KW - Honshu KW - actinides KW - Japan KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849306856?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Environmental+Radioactivity&rft.atitle=Role+of+natural+organic+matter+on+iodine+and+%28super+239%2C240%29+Pu+distribution+and+mobility+in+environmental+samples+from+the+northwestern+Fukushima+Prefecture%2C+Japan&rft.au=Xu%2C+Chen%3BZhang%2C+Saijin%3BSugiyama%2C+Yuko%3BOhte%2C+Nobuhito%3BHo%2C+Yi-Fang%3BFujitake%2C+Nobuhide%3BKaplan%2C+Daniel+I%3BYeager%2C+Chris+M%3BSchwehr%2C+Kathleen%3BSantschi%2C+Peter+H&rft.aulast=Xu&rft.aufirst=Chen&rft.date=2016-03-01&rft.volume=153&rft.issue=&rft.spage=156&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2015.12.022 L2 - http://www.sciencedirect.com/science/journal/0265931X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 93 N1 - Document feature - illus. incl. 2 tables, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - actinides; alkali metals; Asia; cesium; Cs-137; deposition; Eh; environmental analysis; fallout; Far East; forest soils; Fukushima Japan; Fukushima nuclear accident; halogens; Honshu; I-129; ICP mass spectra; iodine; isotope ratios; isotopes; Japan; mass spectra; metals; migration of elements; mobilization; nitrogen; Oguni Forest; organic compounds; pH; plutonium; pollutants; pollution; Pu-240/Pu-239; radioactive isotopes; soil pollution; soils; spectra; stemflow; vegetation DO - http://dx.doi.org/10.1016/j.jenvrad.2015.12.022 ER - TY - JOUR T1 - Three-dimensional modeling of outcrop-to-outcrop hydrothermal circulation on the eastern flank of the Juan de Fuca Ridge AN - 1840615569; 2016-093829 AB - We present three-dimensional simulations of coupled fluid and heat transport in the ocean crust, to explore patterns and controls on ridge-flank hydrothermal circulation on the eastern flank of the Juan de Fuca Ridge. Field studies have shown that there is large-scale fluid flow in the volcanic ocean crust in this region, including local convection and circulation between two basement outcrops separated by approximately 50 km. New simulations include an assessment of crustal permeability and aquifer thickness, outcrop permeability, the potential influence of multiple discharging outcrops, and a comparison between two-dimensional (profile) and three-dimensional representations of the natural system. Field observations that help to constrain new simulations include a modest range of flow rates between recharging and discharging outcrops, secondary convection adjacent to the recharging outcrop, crustal permeability determinations made in boreholes, and the lack of a regional seafloor heat flux anomaly as a consequence of advective heat loss from the crust. Three-dimensional simulations are most consistent with field observations when models use a crustal permeability of 3 X 10 (super -13) to 2 X 10 (super -12) m (super 2) , and the crustal aquifer is < or =300 m thick, values consistent with borehole observations. We find fluid flow rates and crustal cooling efficiencies that are an order of magnitude greater in three-dimensional simulations than in two-dimensional simulations using equivalent properties. Simulations including discharge from an additional outcrop can also replicate field observations but tend to increase the overall rate of recharge and reduce the flow rate at the primary discharge site. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Winslow, Dustin M AU - Fisher, Andrew T AU - Stauffer, Phil H AU - Gable, Carl W AU - Zyvoloski, George A Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 1365 EP - 1382 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 3 SN - 2169-9313, 2169-9313 KW - oceanic crust KW - Northeast Pacific KW - oceanic lithosphere KW - ground water KW - Juan de Fuca Ridge KW - ocean floors KW - discharge KW - East Pacific KW - three-dimensional models KW - lithosphere KW - fluid flow KW - Equatorial Pacific KW - DSDP Site 504 KW - convection KW - hydrothermal conditions KW - aquifers KW - Grizzly Bare KW - plate tectonics KW - boreholes KW - North Pacific KW - Pacific Ocean KW - Ocean Drilling Program KW - Baby Bare KW - permeability KW - crust KW - mid-ocean ridges KW - 18:Solid-earth geophysics KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840615569?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Three-dimensional+modeling+of+outcrop-to-outcrop+hydrothermal+circulation+on+the+eastern+flank+of+the+Juan+de+Fuca+Ridge&rft.au=Winslow%2C+Dustin+M%3BFisher%2C+Andrew+T%3BStauffer%2C+Phil+H%3BGable%2C+Carl+W%3BZyvoloski%2C+George+A&rft.aulast=Winslow&rft.aufirst=Dustin&rft.date=2016-03-01&rft.volume=121&rft.issue=3&rft.spage=1365&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2015JB012606 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 35 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - aquifers; Baby Bare; boreholes; convection; crust; discharge; DSDP Site 504; East Pacific; Equatorial Pacific; fluid flow; Grizzly Bare; ground water; hydrothermal conditions; Juan de Fuca Ridge; lithosphere; mid-ocean ridges; North Pacific; Northeast Pacific; Ocean Drilling Program; ocean floors; oceanic crust; oceanic lithosphere; Pacific Ocean; permeability; plate tectonics; three-dimensional models DO - http://dx.doi.org/10.1002/2015JB012606 ER - TY - JOUR T1 - Permeability and flow field evolution due to dissolution of calcite in a 3-D porous rock under geothermal gradient and through-flow AN - 1832603909; 772370-3 AB - Flow of undersaturated water in limestone aquifer can cause continuous permeability growth due to dissolution. We have simulated the evolution of permeability field of a 3-D porous limestone aquifer subjected to geothermal temperature gradient and vertical through-flow. The upward flow through porous limestone results in dissolution since calcite is a retrograde soluble mineral. In addition to permeability growth by promoting more dissolution, through-flow also inhibits Rayleigh Benard convection. To understand the temporal evolution of permeability and flow fields, we have performed several simulations with various combinations of initial permeability and through-flow magnitude. Since our computational domain is different in size and boundary conditions from past studies related to buoyant convection in porous medium, we have carried out simulations without reactive alteration to distinguish the hydrothermal systems as stable or unstable. The permeability growth is insignificant in the central part of the reservoir as the temperature gradient vanishes due to forced convection. Permeability growth is more near the edges, where temperature gradients are significant due to conductive heat transfer from the boundaries. For small magnitudes of through-flow, convection rolls are formed near the corners. However, the growth is very localized and rolls never form when magnitude of through-flow is large. Copyright 2016 Springer Science+Business Media Dordrecht JF - Transport in Porous Media AU - Sandeep, V R AU - Chaudhuri, Abhijit AU - Kelkar, Sharad Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 39 EP - 52 PB - Springer, Dordrecht VL - 112 IS - 1 SN - 0169-3913, 0169-3913 KW - limestone KW - fluid flow KW - porous materials KW - convection KW - solution KW - simulation KW - boundary conditions KW - reservoir rocks KW - ground water KW - calcite KW - aquifers KW - throughflow KW - Rayleigh-Benard convection KW - sedimentary rocks KW - geothermal systems KW - heat flow KW - geothermal gradient KW - carbonate rocks KW - carbonates KW - permeability KW - 18:Solid-earth geophysics KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832603909?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transport+in+Porous+Media&rft.atitle=Permeability+and+flow+field+evolution+due+to+dissolution+of+calcite+in+a+3-D+porous+rock+under+geothermal+gradient+and+through-flow&rft.au=Sandeep%2C+V+R%3BChaudhuri%2C+Abhijit%3BKelkar%2C+Sharad&rft.aulast=Sandeep&rft.aufirst=V&rft.date=2016-03-01&rft.volume=112&rft.issue=1&rft.spage=39&rft.isbn=&rft.btitle=&rft.title=Transport+in+Porous+Media&rft.issn=01693913&rft_id=info:doi/10.1007%2Fs11242-016-0631-0 L2 - http://springerlink.metapress.com/(l4tqdq55jga2hgb0achos1qm)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100342,1 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Number of references - 22 N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aquifers; boundary conditions; calcite; carbonate rocks; carbonates; convection; fluid flow; geothermal gradient; geothermal systems; ground water; heat flow; limestone; permeability; porous materials; Rayleigh-Benard convection; reservoir rocks; sedimentary rocks; simulation; solution; throughflow DO - http://dx.doi.org/10.1007/s11242-016-0631-0 ER - TY - JOUR T1 - Thermal effects of groundwater flow through subarctic fens; a case study based on field observations and numerical modeling AN - 1815665168; 2016-076034 AB - Modeling and observation of ground temperature dynamics are the main tools for understanding current permafrost thermal regimes and projecting future thaw. Until recently, most studies on permafrost have focused on vertical ground heat fluxes. Groundwater can transport heat in both lateral and vertical directions but its influence on ground temperatures at local scales in permafrost environments is not well understood. In this study we combine field observations from a subarctic fen in the sporadic permafrost zone with numerical simulations of coupled water and thermal fluxes. At the Tavvavuoma study site in northern Sweden, ground temperature profiles and groundwater levels were observed in boreholes. These observations were used to set up one- and two-dimensional simulations down to 2 m depth across a gradient of permafrost conditions within and surrounding the fen. Two-dimensional scenarios representing the fen under various hydraulic gradients were developed to quantify the influence of groundwater flow on ground temperature. Our observations suggest that lateral groundwater flow significantly affects ground temperatures. This is corroborated by modeling results that show seasonal ground ice melts 1 month earlier when a lateral groundwater flux is present. Further, although the thermal regime may be dominated by vertically conducted heat fluxes during most of the year, isolated high groundwater flow rate events such as the spring freshet are potentially important for ground temperatures. As sporadic permafrost environments often contain substantial portions of unfrozen ground with active groundwater flow paths, knowledge of this heat transport mechanism is important for understanding permafrost dynamics in these environments. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Sjoberg, Ylva AU - Coon, Ethan AU - Sannel, A Britta K AU - Pannetier, Romain AU - Harp, Dylan AU - Frampton, Andrew AU - Painter, Scott L AU - Lyon, Steve W Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 1591 EP - 1606 PB - American Geophysical Union, Washington, DC VL - 52 IS - 3 SN - 0043-1397, 0043-1397 KW - peatlands KW - terrestrial environment KW - permafrost KW - Western Europe KW - numerical models KW - Europe KW - preferential flow KW - advection KW - thermal regime KW - Lapland KW - ground water KW - boreal environment KW - case studies KW - Scandinavia KW - mires KW - fens KW - Tavvavuoma National Park KW - ice KW - heat transfer KW - ground ice KW - thermal effects KW - Sweden KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815665168?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Thermal+effects+of+groundwater+flow+through+subarctic+fens%3B+a+case+study+based+on+field+observations+and+numerical+modeling&rft.au=Sjoberg%2C+Ylva%3BCoon%2C+Ethan%3BSannel%2C+A+Britta+K%3BPannetier%2C+Romain%3BHarp%2C+Dylan%3BFrampton%2C+Andrew%3BPainter%2C+Scott+L%3BLyon%2C+Steve+W&rft.aulast=Sjoberg&rft.aufirst=Ylva&rft.date=2016-03-01&rft.volume=52&rft.issue=3&rft.spage=1591&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR017571 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 51 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2016-09-01 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - advection; boreal environment; case studies; Europe; fens; ground ice; ground water; heat transfer; ice; Lapland; mires; numerical models; peatlands; permafrost; preferential flow; Scandinavia; Sweden; Tavvavuoma National Park; terrestrial environment; thermal effects; thermal regime; Western Europe DO - http://dx.doi.org/10.1002/2015WR017571 ER - TY - JOUR T1 - Fusing geophysical signatures of locally recorded surface explosions to improve blast detection AN - 1803780230; 2016-060591 AB - We recorded acoustic, seismic and radio-frequency signatures of 70 solid charge ( approximately 2-12 kg) surface explosions (shots) at local distances (0.1-1.5 km) to determine if such signals could be fused for blast monitoring. We observed that each geophysical signature was sufficiently repeatable between similar shots to be identifiable with multichannel correlation detectors. Using template signals from a large explosion, we then processed heavily contaminated data recording a smaller shot with these detectors, and missed or marginally detected the resultant target signals. By then fusing the p-values of these statistics through Fisher's combined probability test, we clearly identified the same explosion signals at thresholds consistent with the false alarm on noise rates of the correlation detectors. This resulting Fisher test thereby provided high-probability detections, zero false alarms and higher theoretical detection capability. JF - Geophysical Journal International AU - Carmichael, Joshua D AU - Nemzek, Robert AU - Arrowsmith, Stephen AU - Sentz, Kari Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 1838 EP - 1842 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 204 IS - 3 SN - 0956-540X, 0956-540X KW - technology KW - monitoring KW - explosions KW - statistical analysis KW - elastic waves KW - waveforms KW - noise KW - seismicity KW - propagation KW - probability KW - seismic waves KW - algorithms KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803780230?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Fusing+geophysical+signatures+of+locally+recorded+surface+explosions+to+improve+blast+detection&rft.au=Carmichael%2C+Joshua+D%3BNemzek%2C+Robert%3BArrowsmith%2C+Stephen%3BSentz%2C+Kari&rft.aulast=Carmichael&rft.aufirst=Joshua&rft.date=2016-03-01&rft.volume=204&rft.issue=3&rft.spage=1838&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/ L2 - http://gji.oxfordjournals.org/content/204/3/1838.abstract http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 10 N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-07-14 N1 - SubjectsTermNotLitGenreText - algorithms; elastic waves; explosions; monitoring; noise; probability; propagation; seismic waves; seismicity; statistical analysis; technology; waveforms ER - TY - JOUR T1 - Observation of > 5 wt % zinc at the Kimberley outcrop, Gale Crater, Mars AN - 1800396229; 2016-058712 AB - Zinc-enriched targets have been detected at the Kimberley formation, Gale crater, Mars, using the Chemistry Camera (ChemCam) instrument. The Zn content is analyzed with a univariate calibration based on the 481.2 nm emission line. The limit of quantification for ZnO is 3 wt % (at 95% confidence level) and 1 wt % (at 68% confidence level). The limit of detection is shown to be around 0.5 wt %. As of sol 950, 12 targets on Mars present high ZnO content ranging from 1.0 wt % to 8.4 wt % (Yarrada, sol 628). Those Zn-enriched targets are almost entirely located at the Dillinger member of the Kimberley formation, where high Mn and alkali contents were also detected, probably in different phases. Zn enrichment does not depend on the textures of the rocks (coarse-grained sandstones, pebbly conglomerates, and resistant fins). The lack of sulfur enhancement suggests that Zn is not present in the sphalerite phase. Zn appears somewhat correlated with Na (sub 2) O and the ChemCam hydration index, suggesting that it could be in an amorphous clay phase (such as sauconite). On Earth, such an enrichment would be consistent with a supergene alteration of a sphalerite gossan cap in a primary siliciclastic bedrock or a possible hypogene nonsulfide zinc deposition where Zn, Fe, Mn would have been transported in a reduced sulfur-poor fluid and precipitated rapidly in the form of oxides. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Lasue, J AU - Clegg, S M AU - Forni, O AU - Cousin, A AU - Wiens, R C AU - Lanza, N AU - Mangold, Nicolas AU - Le Deit, L AU - Gasnault, O AU - Maurice, S AU - Berger, J A AU - Stack, K AU - Blaney, D AU - Fabre, C AU - Goetz, W AU - Johnson, J AU - Le Mouelic, S AU - Nachon, M AU - Payre, V AU - Rapin, W AU - Sumner, Dawn Y Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 338 EP - 352 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 3 SN - 2169-9097, 2169-9097 KW - zinc KW - laser-induced breakdown spectroscopy KW - data processing KW - sandstone KW - techniques KW - Mars KW - Kimberley Formation KW - manganese KW - iron KW - conglomerate KW - Gale Crater KW - emission spectroscopy KW - terrestrial planets KW - planets KW - sedimentary rocks KW - metals KW - spectroscopy KW - clastic rocks KW - Dillinger Member KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800396229?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Observation+of+%26gt%3B+5+wt+%25+zinc+at+the+Kimberley+outcrop%2C+Gale+Crater%2C+Mars&rft.au=Lasue%2C+J%3BClegg%2C+S+M%3BForni%2C+O%3BCousin%2C+A%3BWiens%2C+R+C%3BLanza%2C+N%3BMangold%2C+Nicolas%3BLe+Deit%2C+L%3BGasnault%2C+O%3BMaurice%2C+S%3BBerger%2C+J+A%3BStack%2C+K%3BBlaney%2C+D%3BFabre%2C+C%3BGoetz%2C+W%3BJohnson%2C+J%3BLe+Mouelic%2C+S%3BNachon%2C+M%3BPayre%2C+V%3BRapin%2C+W%3BSumner%2C+Dawn+Y&rft.aulast=Lasue&rft.aufirst=J&rft.date=2016-03-01&rft.volume=121&rft.issue=3&rft.spage=338&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2015JE004946 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 62 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-06-30 N1 - SubjectsTermNotLitGenreText - clastic rocks; conglomerate; data processing; Dillinger Member; emission spectroscopy; Gale Crater; iron; Kimberley Formation; laser-induced breakdown spectroscopy; manganese; Mars; metals; planets; sandstone; sedimentary rocks; spectroscopy; techniques; terrestrial planets; zinc DO - http://dx.doi.org/10.1002/2015JE004946 ER - TY - JOUR T1 - Composition of conglomerates analyzed by the Curiosity Rover; implications for Gale Crater crust and sediment sources AN - 1800394952; 2016-058713 AB - The Curiosity rover has analyzed various detrital sedimentary rocks at Gale Crater, among which fluvial and lacustrine rocks are predominant. Conglomerates correspond both to the coarsest sediments analyzed and the least modified by chemical alteration, enabling us to link their chemistry to that of source rocks on the Gale Crater rims. In this study, we report the results of six conglomerate targets analyzed by Alpha-Particle X-ray Spectrometer and 40 analyzed by ChemCam. The bulk chemistry derived by both instruments suggests two distinct end-members for the conglomerate compositions. The first group (Darwin type) is typical of conglomerates analyzed before sol 540; it has a felsic alkali-rich composition, with a Na (sub 2) O/K (sub 2) O > 5. The second group (Kimberley type) is typical of conglomerates analyzed between sols 540 and 670 in the vicinity of the Kimberley waypoint; it has an alkali-rich potassic composition with Na (sub 2) O/K (sub 2) O < 2. The variety of chemistry and igneous textures (when identifiable) of individual clasts suggest that each conglomerate type is a mixture of multiple source rocks. Conglomerate compositions are in agreement with most of the felsic alkali-rich float rock compositions analyzed in the hummocky plains. The average composition of conglomerates can be taken as a proxy of the average igneous crust composition at Gale Crater. Differences between the composition of conglomerates and that of finer-grained detrital sediments analyzed by the rover suggest modifications by diagenetic processes (especially for Mg enrichments in fine-grained rocks), physical sorting, and mixing with finer-grained material of different composition. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Mangold, Nicolas AU - Thompson, L M AU - Forni, O AU - Williams, A J AU - Fabre, C AU - Le Deit, L AU - Wiens, R C AU - Williams, R AU - Anderson, R B AU - Blaney, D L AU - Calef, F AU - Cousin, A AU - Clegg, S M AU - Dromart, G AU - Dietrich, William E AU - Edgett, K S AU - Fisk, M R AU - Gasnault, O AU - Gellert, R AU - Grotzinger, J P AU - Kah, L AU - Le Mouelic, S AU - McLennan, S M AU - Maurice, S AU - Meslin, P Y AU - Newsom, H E AU - Palucis, M C AU - Rapin, W AU - Sautter, V AU - Siebach, K L AU - Stack, K AU - Sumner, Dawn Y AU - Yingst, A Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 353 EP - 387 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 3 SN - 2169-9097, 2169-9097 KW - magnesium KW - enrichment KW - Mars KW - Gale Crater KW - sedimentary rocks KW - Curiosity Rover KW - sediments KW - spectra KW - detrital deposits KW - chemical composition KW - alkaline earth metals KW - sedimentation KW - fluvial sedimentation KW - X-ray spectra KW - conglomerate KW - terrestrial planets KW - provenance KW - planets KW - metals KW - fine-grained materials KW - diagenesis KW - Mars Science Laboratory KW - clastic rocks KW - crust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800394952?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Composition+of+conglomerates+analyzed+by+the+Curiosity+Rover%3B+implications+for+Gale+Crater+crust+and+sediment+sources&rft.au=Mangold%2C+Nicolas%3BThompson%2C+L+M%3BForni%2C+O%3BWilliams%2C+A+J%3BFabre%2C+C%3BLe+Deit%2C+L%3BWiens%2C+R+C%3BWilliams%2C+R%3BAnderson%2C+R+B%3BBlaney%2C+D+L%3BCalef%2C+F%3BCousin%2C+A%3BClegg%2C+S+M%3BDromart%2C+G%3BDietrich%2C+William+E%3BEdgett%2C+K+S%3BFisk%2C+M+R%3BGasnault%2C+O%3BGellert%2C+R%3BGrotzinger%2C+J+P%3BKah%2C+L%3BLe+Mouelic%2C+S%3BMcLennan%2C+S+M%3BMaurice%2C+S%3BMeslin%2C+P+Y%3BNewsom%2C+H+E%3BPalucis%2C+M+C%3BRapin%2C+W%3BSautter%2C+V%3BSiebach%2C+K+L%3BStack%2C+K%3BSumner%2C+Dawn+Y%3BYingst%2C+A&rft.aulast=Mangold&rft.aufirst=Nicolas&rft.date=2016-03-01&rft.volume=121&rft.issue=3&rft.spage=353&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2015JE004977 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 97 N1 - PubXState - DC N1 - Document feature - illus. incl. 8 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-06-30 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; chemical composition; clastic rocks; conglomerate; crust; Curiosity Rover; detrital deposits; diagenesis; enrichment; fine-grained materials; fluvial sedimentation; Gale Crater; magnesium; Mars; Mars Science Laboratory; metals; planets; provenance; sedimentary rocks; sedimentation; sediments; spectra; terrestrial planets; X-ray spectra DO - http://dx.doi.org/10.1002/2015JE004977 ER - TY - JOUR T1 - Statistic inversion of multi-zone transition probability models for aquifer characterization in alluvial fans AN - 1776648228; PQ0002813388 AB - Understanding the heterogeneity arising from the complex architecture of sedimentary sequences in alluvial fans is challenging. This paper develops a statistical inverse framework in a multi-zone transition probability approach for characterizing the heterogeneity in alluvial fans. An analytical solution of the transition probability matrix is used to define the statistical relationships among different hydrofacies and their mean lengths, integral scales, and volumetric proportions. A statistical inversion is conducted to identify the multi-zone transition probability models and estimate the optimal statistical parameters using the modified Gauss-Newton-Levenberg-Marquardt method. The Jacobian matrix is computed by the sensitivity equation method, which results in an accurate inverse solution with quantification of parameter uncertainty. We use the Chaobai River alluvial fan in the Beijing Plain, China, as an example for elucidating the methodology of alluvial fan characterization. The alluvial fan is divided into three sediment zones. In each zone, the explicit mathematical formulations of the transition probability models are constructed with optimized different integral scales and volumetric proportions. The hydrofacies distributions in the three zones are simulated sequentially by the multi-zone transition probability-based indicator simulations. The result of this study provides the heterogeneous structure of the alluvial fan for further study of flow and transport simulations. JF - Stochastic Environmental Research and Risk Assessment AU - Zhu, Lin AU - Dai, Zhenxue AU - Gong, Huili AU - Gable, Carl AU - Teatini, Pietro AD - College of Resources Environment and Tourism, Capital Normal University, Laboratory Cultivation Base of Environment Process and Digital Simulation, Beijing, 100048, China, daiz@lanl.gov Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 1005 EP - 1016 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 30 IS - 3 SN - 1436-3240, 1436-3240 KW - Risk Abstracts UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1776648228?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Stochastic+Environmental+Research+and+Risk+Assessment&rft.atitle=Statistic+inversion+of+multi-zone+transition+probability+models+for+aquifer+characterization+in+alluvial+fans&rft.au=Zhu%2C+Lin%3BDai%2C+Zhenxue%3BGong%2C+Huili%3BGable%2C+Carl%3BTeatini%2C+Pietro&rft.aulast=Zhu&rft.aufirst=Lin&rft.date=2016-03-01&rft.volume=30&rft.issue=3&rft.spage=1005&rft.isbn=&rft.btitle=&rft.title=Stochastic+Environmental+Research+and+Risk+Assessment&rft.issn=14363240&rft_id=info:doi/10.1007%2Fs00477-015-1089-2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Number of references - 44 N1 - Last updated - 2016-03-30 DO - http://dx.doi.org/10.1007/s00477-015-1089-2 ER - TY - JOUR T1 - Quantitative Mass Spectrometry Reveals that Intact Histone H1 Phosphorylations are Variant Specific and Exhibit Single Molecule Hierarchical Dependence. AN - 1770219795; 26209608 AB - Breast cancer was the second leading cause of cancer related mortality for females in 2014. Recent studies suggest histone H1 phosphorylation may be useful as a clinical biomarker of breast and other cancers because of its ability to recognize proliferative cell populations. Although monitoring a single phosphorylated H1 residue is adequate to stratify high-grade breast tumors, expanding our knowledge of how H1 is phosphorylated through the cell cycle is paramount to understanding its role in carcinogenesis. H1 analysis by bottom-up MS is challenging because of the presence of highly homologous sequence variants expressed by most cells. These highly basic proteins are difficult to analyze by LC-MS/MS because of the small, hydrophilic nature of peptides produced by tryptic digestion. Although bottom-up methods permit identification of several H1 phosphorylation events, these peptides are not useful for observing the combinatorial post-translational modification (PTM) patterns on the protein of interest. To complement the information provided by bottom-up MS, we utilized a top-down MS/MS workflow to permit identification and quantitation of H1 proteoforms related to the progression of breast cells through the cell cycle. Histones H1.2 and H1.4 were observed in MDA-MB-231 metastatic breast cells, whereas an additional histone variant, histone H1.3, was identified only in nonneoplastic MCF-10A cells. Progressive phosphorylation of histone H1.4 was identified in both cell lines at mitosis (M phase). Phosphorylation occurred first at S172 followed successively by S187, T18, T146, and T154. Notably, phosphorylation at S173 of histone H1.2 and S172, S187, T18, T146, and T154 of H1.4 significantly increases during M phase relative to S phase, suggesting that these events are cell cycle-dependent and may serve as markers for proliferation. Finally, we report the observation of the H1.2 SNP variant A18V in MCF-10A cells. JF - Molecular & cellular proteomics : MCP AU - Chen, Yu AU - Hoover, Michael E AU - Dang, Xibei AU - Shomo, Alan A AU - Guan, Xiaoyan AU - Marshall, Alan G AU - Freitas, Michael A AU - Young, Nicolas L AD - From the ‡Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, 32310; ; §Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, Ohio, College of Medicine and Arthur G. James Comprehensive Cancer Center, Columbus, Ohio, 43210; ; ¶Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306. ; From the ‡Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, 32310; ¶Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306. ; §Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, Ohio, College of Medicine and Arthur G. James Comprehensive Cancer Center, Columbus, Ohio, 43210; nyoung@magnet.fsu.edu freitas.5@osu.edu. ; From the ‡Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, 32310; nyoung@magnet.fsu.edu freitas.5@osu.edu. Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 818 EP - 833 VL - 15 IS - 3 KW - Histones KW - 0 KW - Index Medicus KW - Polymorphism, Single Nucleotide KW - Phosphorylation KW - Humans KW - Protein Processing, Post-Translational KW - Cell Line, Tumor KW - Cell Proliferation KW - Cell Cycle KW - Female KW - Histones -- metabolism KW - Tandem Mass Spectrometry -- methods KW - Breast Neoplasms -- metabolism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770219795?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Molecular+%26+cellular+proteomics+%3A+MCP&rft.atitle=Quantitative+Mass+Spectrometry+Reveals+that+Intact+Histone+H1+Phosphorylations+are+Variant+Specific+and+Exhibit+Single+Molecule+Hierarchical+Dependence.&rft.au=Chen%2C+Yu%3BHoover%2C+Michael+E%3BDang%2C+Xibei%3BShomo%2C+Alan+A%3BGuan%2C+Xiaoyan%3BMarshall%2C+Alan+G%3BFreitas%2C+Michael+A%3BYoung%2C+Nicolas+L&rft.aulast=Chen&rft.aufirst=Yu&rft.date=2016-03-01&rft.volume=15&rft.issue=3&rft.spage=818&rft.isbn=&rft.btitle=&rft.title=Molecular+%26+cellular+proteomics+%3A+MCP&rft.issn=1535-9484&rft_id=info:doi/10.1074%2Fmcp.M114.046441 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-12-13 N1 - Date created - 2016-03-02 N1 - Date revised - 2017-03-02 N1 - SuppNotes - Cited By: BJU Int. 2011 Oct;108(8 Pt 2):E290-6 [21627749] N Engl J Med. 2003 Apr 24;348(17):1672-80 [12711743] Mol Cell. 2007 Mar 23;25(6):801-12 [17363312] Am J Pathol. 2009 May;174(5):1619-28 [19349354] J Biol Chem. 1994 Apr 1;269(13):9568-73 [8144543] J Biol Chem. 1975 May 25;250(10):3936-44 [1168641] J Proteome Res. 2009 Nov;8(11):5367-74 [19764812] Nature. 2005 Jun 30;435(7046):1262-6 [15988529] Nucleic Acids Res. 1978 Sep;5(9):3195-207 [704351] J Am Soc Mass Spectrom. 2002 Nov;13(11):1304-12 [12443021] FEBS Lett. 2014 Jun 27;588(14):2353-62 [24873882] Anal Chem. 2011 Sep 1;83(17):6907-10 [21838231] Oncogene. 2012 Sep 27;31(39):4290-301 [22249259] J Biol Chem. 1995 Nov 17;270(46):27653-60 [7499230] Diagn Cytopathol. 2008 Nov;36(11):797-800 [18831009] Cancer Res. 2009 May 1;69(9):3802-9 [19366799] Curr Protoc Protein Sci. 2014;77:23.7.1-28 [25081742] Curr Protoc Bioinformatics. 2007 Sep;Chapter 13:Unit 13.6 [18428787] Nucleic Acids Res. 2014 Apr;42(7):4474-93 [24476918] Nature. 2000 Jan 6;403(6765):41-5 [10638745] J Clin Oncol. 2010 Mar 10;28(8):1358-65 [20142597] J Am Soc Mass Spectrom. 2000 Apr;11(4):320-32 [10757168] Cell. 2011 Mar 4;144(5):646-74 [21376230] Histopathology. 2006 May;48(6):708-16 [16681687] FEBS J. 2005 Jul;272(14):3673-83 [16008566] J Clin Oncol. 2007 Oct 1;25(28):4358-64 [17906200] Proteomics. 2014 May;14(10):1130-40 [24644084] Nat Methods. 2013 Mar;10(3):186-7 [23443629] J Proteomics. 2012 Jul 16;75(13):4124-38 [22647927] PLoS Genet. 2008 Oct;4(10):e1000227 [18927631] Proteomics. 2010 Dec;10(23):4281-92 [21110323] Trends Cell Biol. 2002 Apr;12(4):164-72 [11978535] J Am Soc Mass Spectrom. 2006 Sep;17(9):1299-305 [16839773] J Am Soc Mass Spectrom. 2011 Aug;22(8):1343-51 [21953188] Cancer Res. 1990 Sep 15;50(18):6075-86 [1975513] Hum Pathol. 2003 Feb;34(2):166-73 [12612885] Mod Pathol. 2002 Jul;15(7):705-11 [12118107] Nucleic Acids Res. 2004 Jul 1;32(Web Server issue):W340-5 [15215407] Chromosoma. 2009 Dec;118(6):693-709 [19609548] J Cell Sci. 2011 May 15;124(Pt 10):1623-8 [21511733] J Urol. 2009 Mar;181(3):1387-92 [19157440] Mol Cell Proteomics. 2006 Sep;5(9):1593-609 [16835217] Eur J Biochem. 1973 Feb 15;33(1):131-9 [4570762] Anal Chem. 2010 Nov 1;82(21):8807-12 [20954755] J Proteome Res. 2004 Nov-Dec;3(6):1219-27 [15595731] Eur J Biochem. 1978 Mar;84(1):1-15 [206429] Proc Natl Acad Sci U S A. 2013 Jan 29;110(5):1708-13 [23302691] J Biol Chem. 2008 Apr 4;283(14):9113-26 [18258596] J Proteome Res. 2013 Jul 5;12(7):3317-26 [23675690] Anal Chem. 1984 Dec;56(14):2744-8 [6524653] Genome Biol. 2012;13(10):R86 [23034525] J Biol Chem. 2001 Dec 7;276(49):46429-35 [11584004] Mol Cell Biol. 2007 Apr;27(7):2746-57 [17242185] J Proteomics. 2013 Oct 8;91:595-604 [24013129] Genome Med. 2013 Jun 27;5(6):53 [23806018] Nucleic Acids Res. 2007 Jul;35(Web Server issue):W701-6 [17586823] Nature. 1980 Mar 13;284(5752):181-3 [7360244] Nucleic Acids Res. 2013 Nov;41(21):9593-609 [23945933] J Biol Chem. 1999 May 21;274(21):14533-6 [10329641] Eur J Biochem. 1975 Apr 1;52(3):605-13 [1236150] Anal Chem. 2003 Aug 15;75(16):4081-6 [14632120] J Biol Chem. 2006 Mar 10;281(10):6573-80 [16377619] Proteomics. 2014 Mar;14(4-5):489-97 [24339419] Biochemistry. 1981 Mar 17;20(6):1445-54 [7225343] Histopathology. 2006 May;48(6):717-22 [16681688] Mol Cell Proteomics. 2007 Jan;6(1):72-87 [17043054] Genes Dev. 2012 Apr 15;26(8):797-802 [22465951] Anal Chem. 1998 Oct 1;70(19):4111-9 [9784749] J Biol Chem. 2011 Oct 14;286(41):35843-51 [21852232] J Biochem. 1989 Nov;106(5):844-57 [2613692] Mass Spectrom Rev. 2010 Mar-Apr;29(2):294-312 [19391099] Proc Natl Acad Sci U S A. 2011 May 3;108(18):7541-6 [21502505] J Cell Biol. 2010 May 3;189(3):407-15 [20439994] Epigenetics Chromatin. 2011 Aug 05;4:15 [21819549] J Proteome Res. 2014 May 2;13(5):2453-67 [24601643] N1 - Last updated - 2017-03-02 DO - http://dx.doi.org/10.1074/mcp.M114.046441 ER - TY - JOUR T1 - Dynamically triggered slip leading to sustained fault gouge weakening under laboratory shear conditions AN - 1819894719; 2016-080327 AB - We investigate dynamic wave-triggered slip under laboratory shear conditions. The experiment is composed of a three-block system containing two gouge layers composed of glass beads and held in place by a fixed load in a biaxial configuration. When the system is sheared under steady state conditions at a normal load of 4 MPa, we find that shear failure may be instantaneously triggered by a dynamic wave, corresponding to material weakening and softening if the system is in a critical shear stress state (near failure). Following triggering, the gouge material remains in a perturbed state over multiple slip cycles as evidenced by the recovery of the material strength, shear modulus, and slip recurrence time. This work suggests that faults must be critically stressed to trigger under dynamic conditions and that the recovery process following a dynamically triggered event differs from the recovery following a spontaneous event. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Johnson, P A AU - Carmeliet, J AU - Savage, H M AU - Scuderi, Marco AU - Carpenter, B M AU - Guyer, R A AU - Daub, E G AU - Marone, C Y1 - 2016/02/28/ PY - 2016 DA - 2016 Feb 28 SP - 1559 EP - 1565 PB - American Geophysical Union, Washington, DC VL - 43 IS - 4 SN - 0094-8276, 0094-8276 KW - United States KW - failures KW - experimental studies KW - shear stress KW - loading KW - magnitude KW - slip rates KW - elastic constants KW - physical models KW - Landers earthquake 1992 KW - California KW - laboratory studies KW - gouge KW - dynamics KW - shear KW - shear modulus KW - active faults KW - earthquakes KW - faults KW - 19:Seismology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894719?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Dynamically+triggered+slip+leading+to+sustained+fault+gouge+weakening+under+laboratory+shear+conditions&rft.au=Johnson%2C+P+A%3BCarmeliet%2C+J%3BSavage%2C+H+M%3BScuderi%2C+Marco%3BCarpenter%2C+B+M%3BGuyer%2C+R+A%3BDaub%2C+E+G%3BMarone%2C+C&rft.aulast=Johnson&rft.aufirst=P&rft.date=2016-02-28&rft.volume=43&rft.issue=4&rft.spage=1559&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2015GL067056 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 27 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2016-09-16 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - active faults; California; dynamics; earthquakes; elastic constants; experimental studies; failures; faults; gouge; laboratory studies; Landers earthquake 1992; loading; magnitude; physical models; shear; shear modulus; shear stress; slip rates; United States DO - http://dx.doi.org/10.1002/2015GL067056 ER - TY - JOUR T1 - distributed modeling of ablation (1996-2011) and climate sensitivity on the glaciers of Taylor Valley, Antarctica AN - 1832619640; 776726-1 JF - Journal of Glaciology AU - Hoffman, Matthew J AU - Fountain, Andrew G AU - Liston, Glen E Y1 - 2016/02/24/ PY - 2016 DA - 2016 Feb 24 SP - 15 PB - International Glaciological Society, Cambridge VL - 2016 SN - 0022-1430, 0022-1430 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832619640?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Glaciology&rft.atitle=distributed+modeling+of+ablation+%281996-2011%29+and+climate+sensitivity+on+the+glaciers+of+Taylor+Valley%2C+Antarctica&rft.au=Hoffman%2C+Matthew+J%3BFountain%2C+Andrew+G%3BListon%2C+Glen+E&rft.aulast=Hoffman&rft.aufirst=Matthew&rft.date=2016-02-24&rft.volume=2016&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Journal+of+Glaciology&rft.issn=00221430&rft_id=info:doi/10.1017%2Fjog.2015.2 L2 - http://www.igsoc.org/journal/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 89 N1 - Last updated - 2017-01-24 N1 - CODEN - JOGLAO DO - http://dx.doi.org/10.1017/jog.2015.2 ER - TY - JOUR T1 - Quantum Yield Heterogeneity among Single Nonblinking Quantum Dots Revealed by Atomic Structure-Quantum Optics Correlation. AN - 1767912400; 26849531 AB - Physical variations in colloidal nanostructures give rise to heterogeneity in expressed optical behavior. This correlation between nanoscale structure and function demands interrogation of both atomic structure and photophysics at the level of single nanostructures to be fully understood. Herein, by conducting detailed analyses of fine atomic structure, chemical composition, and time-resolved single-photon photoluminescence data for the same individual nanocrystals, we reveal inhomogeneity in the quantum yields of single nonblinking "giant" CdSe/CdS core/shell quantum dots (g-QDs). We find that each g-QD possesses distinctive single exciton and biexciton quantum yields that result mainly from variations in the degree of charging, rather than from volume or structure inhomogeneity. We further establish that there is a very limited nonemissive "dark" fraction (<2%) among the studied g-QDs and present direct evidence that the g-QD core must lack inorganic passivation for the g-QD to be "dark". Therefore, in contrast to conventional QDs, ensemble photoluminescence quantum yield is principally defined by charging processes rather than the existence of dark g-QDs. JF - ACS nano AU - Orfield, Noah J AU - McBride, James R AU - Wang, Feng AU - Buck, Matthew R AU - Keene, Joseph D AU - Reid, Kemar R AU - Htoon, Han AU - Hollingsworth, Jennifer A AU - Rosenthal, Sandra J AD - Department of Chemistry, Vanderbilt University , Nashville, Tennessee 37235, United States. ; Materials Physics & Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States. ; Vanderbilt Institute for Nanoscale Science and Engineering, Vanderbilt University , Nashville, Tennessee 37235, United States. Y1 - 2016/02/23/ PY - 2016 DA - 2016 Feb 23 SP - 1960 EP - 1968 VL - 10 IS - 2 KW - quantum yield KW - nanocrystal atomic structure KW - correlation KW - heterogeneity KW - nanocrystal quantum dot UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1767912400?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Quantum+Yield+Heterogeneity+among+Single+Nonblinking+Quantum+Dots+Revealed+by+Atomic+Structure-Quantum+Optics+Correlation.&rft.au=Orfield%2C+Noah+J%3BMcBride%2C+James+R%3BWang%2C+Feng%3BBuck%2C+Matthew+R%3BKeene%2C+Joseph+D%3BReid%2C+Kemar+R%3BHtoon%2C+Han%3BHollingsworth%2C+Jennifer+A%3BRosenthal%2C+Sandra+J&rft.aulast=Orfield&rft.aufirst=Noah&rft.date=2016-02-23&rft.volume=10&rft.issue=2&rft.spage=1960&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Facsnano.5b05876 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-08-02 N1 - Date created - 2016-02-23 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsnano.5b05876 ER - TY - JOUR T1 - New geological and palaeontological age constraint for the gorilla-human lineage split AN - 1793208496; 2016-047457 JF - Nature (London) AU - Katoh, Shigehiro AU - Beyene, Yonas AU - Itaya, Tetsumaru AU - Hyodo, Hironobu AU - Hyodo, Masayuki AU - Yagi, Koshi AU - Gouzu, Chitaro AU - WoldeGabriel, Giday AU - Hart, William K AU - Ambrose, Stanley H AU - Nakaya, Hideo AU - Bernor, Raymond L AU - Boisserie, Jean-Renaud AU - Bibi, Faysal AU - Saegusa, Haruo AU - Sasaki, Tomohiko AU - Sano, Katsuhiro AU - Asfaw, Berhane AU - Suwa, Gen Y1 - 2016/02/11/ PY - 2016 DA - 2016 Feb 11 SP - 215 EP - 218 PB - Macmillan Journals, London VL - 530 IS - 7589 SN - 0028-0836, 0028-0836 KW - type localities KW - East Africa KW - Homo KW - Cenozoic KW - Theria KW - Ethiopia KW - Chorora Formation KW - Eutheria KW - Chordata KW - Gorilla KW - chronostratigraphy KW - Mammalia KW - biologic evolution KW - Primates KW - Miocene KW - Hominidae KW - Nakalipithecus nakayamai KW - Tertiary KW - Chororapithecus abyssinicus KW - speciation KW - Neogene KW - Africa KW - upper Miocene KW - Vertebrata KW - Tetrapoda KW - 11:Vertebrate paleontology KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793208496?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+%28London%29&rft.atitle=New+geological+and+palaeontological+age+constraint+for+the+gorilla-human+lineage+split&rft.au=Katoh%2C+Shigehiro%3BBeyene%2C+Yonas%3BItaya%2C+Tetsumaru%3BHyodo%2C+Hironobu%3BHyodo%2C+Masayuki%3BYagi%2C+Koshi%3BGouzu%2C+Chitaro%3BWoldeGabriel%2C+Giday%3BHart%2C+William+K%3BAmbrose%2C+Stanley+H%3BNakaya%2C+Hideo%3BBernor%2C+Raymond+L%3BBoisserie%2C+Jean-Renaud%3BBibi%2C+Faysal%3BSaegusa%2C+Haruo%3BSasaki%2C+Tomohiko%3BSano%2C+Katsuhiro%3BAsfaw%2C+Berhane%3BSuwa%2C+Gen&rft.aulast=Katoh&rft.aufirst=Shigehiro&rft.date=2016-02-11&rft.volume=530&rft.issue=7589&rft.spage=215&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature16510 L2 - http://www.nature.com/nature/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 30 N1 - Document feature - illus. incl. strat. cols., sketch maps N1 - Last updated - 2016-06-02 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - Africa; biologic evolution; Cenozoic; Chordata; Chorora Formation; Chororapithecus abyssinicus; chronostratigraphy; East Africa; Ethiopia; Eutheria; Gorilla; Hominidae; Homo; Mammalia; Miocene; Nakalipithecus nakayamai; Neogene; Primates; speciation; Tertiary; Tetrapoda; Theria; type localities; upper Miocene; Vertebrata DO - http://dx.doi.org/10.1038/nature16510 ER - TY - JOUR T1 - Phenomenology and modeling of explosion-generated shear energy for the source physics experiments AN - 1803774824; 2016-060221 AB - We present a mechanism for shear-wave generation from buried explosions as part of the Source Physics Experiment (SPE) series. The SPE series includes sensitized heavy ammonium nitrate/fuel oil sources of various sizes detonated in a borehole in the jointed Climax stock granite. The cylinder-shaped shots were grouted in the borehole to couple the energy to the rock. A high-fidelity site model-with explicit inclusion of the cylindrical explosive, the grout-filled borehole, and site joint sets-was included in a numerical simulation that mimics the near-field velocity environment measured by an array of in-ground accelerometers. This approach was accommodated through a coupled Euler-Lagrange code that allows simultaneous solving of a Euler domain to model the high-deformation source region and a Lagrange domain that includes the complex geology with full contact. Specific laboratory-measured geomechanical properties for the rock and the joint sets were included in the model. The simulations compare favorably to the data and provide a possible physical mechanism for unexpected shear motion through the release of stored shear strain on the joints. This research will advance our understanding of explosion-generated shear-wave energy from low-yield nuclear tests. JF - Bulletin of the Seismological Society of America AU - Steedman, David W AU - Bradley, Christopher R AU - Rougier, Esteban AU - Coblentz, David D Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 42 EP - 53 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 1 SN - 0037-1106, 0037-1106 KW - United States KW - body waves KW - technology KW - explosions KW - joints KW - elastic waves KW - seismic sources KW - simulation KW - information management KW - data management KW - models KW - Nevada Test Site KW - fractures KW - style KW - seismicity KW - seismic waves KW - seismic energy KW - nuclear explosions KW - earthquakes KW - S-waves KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803774824?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Phenomenology+and+modeling+of+explosion-generated+shear+energy+for+the+source+physics+experiments&rft.au=Steedman%2C+David+W%3BBradley%2C+Christopher+R%3BRougier%2C+Esteban%3BCoblentz%2C+David+D&rft.aulast=Steedman&rft.aufirst=David&rft.date=2016-02-01&rft.volume=106&rft.issue=1&rft.spage=42&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150011 L2 - http://bssa.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 48 N1 - PubXState - CA N1 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2016-07-14 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - body waves; data management; earthquakes; elastic waves; explosions; fractures; information management; joints; models; Nevada; Nevada Test Site; nuclear explosions; S-waves; seismic energy; seismic sources; seismic waves; seismicity; simulation; style; technology; United States DO - http://dx.doi.org/10.1785/0120150011 ER - TY - JOUR T1 - Indirect Aerosol Effect Increases CMIP5 Models' Projected Arctic Warming AN - 1790970810; PQ0003081502 AB - Phase 5 of the Coupled Model Intercomparison Project (CMIP5) climate models' projections of the 2014-2100 Arctic warming under radiative forcing from representative concentration pathway 4.5 (RCP4.5) vary from 0.9 degree to 6.7 degree C. Climate models with or without a full indirect aerosol effect are both equally successful in reproducing the observed (1900-2014) Arctic warming and its trends. However, the 2014-2100 Arctic warming and the warming trends projected by models that include a full indirect aerosol effect (denoted here as AA models) are significantly higher (mean projected Arctic warming is about 1.5 degree C higher) than those projected by models without a full indirect aerosol effect (denoted here as NAA models). The suggestion is that, within models including full indirect aerosol effects, those projecting stronger future changes are not necessarily distinguishable historically because any stronger past warming may have been partially offset by stronger historical aerosol cooling. The CMIP5 models that include a full indirect aerosol effect follow an inverse radiative forcing to equilibrium climate sensitivity relationship, while models without it do not. JF - Journal of Climate AU - Chylek, Petr AU - Vogelsang, Timothy J AU - Klett, James D AU - Hengartner, Nicholas AU - Higdon, Dave AU - Lesins, Glen AD - Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, New Mexico Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 1417 EP - 1428 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 29 IS - 4 SN - 0894-8755, 0894-8755 KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Geographic location/entity KW - Arctic KW - Physical Meteorology and Climatology KW - Temperature KW - Mathematical and statistical techniques KW - Time series KW - Models and modeling KW - Climate models KW - Model comparison KW - Variability KW - Climate variability KW - Aerosols KW - Climates KW - Climate change KW - Projections KW - Cooling KW - Model Studies KW - PN, Arctic KW - Radiative forcing KW - Climate sensitivity KW - Modelling KW - AQ 00001:Water Resources and Supplies KW - SW 0810:General KW - M2 551.581:Latitudinal Influences (551.581) KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1790970810?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Climate&rft.atitle=Indirect+Aerosol+Effect+Increases+CMIP5+Models%27+Projected+Arctic+Warming&rft.au=Chylek%2C+Petr%3BVogelsang%2C+Timothy+J%3BKlett%2C+James+D%3BHengartner%2C+Nicholas%3BHigdon%2C+Dave%3BLesins%2C+Glen&rft.aulast=Chylek&rft.aufirst=Petr&rft.date=2016-02-01&rft.volume=29&rft.issue=4&rft.spage=1417&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-15-0362.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Number of references - 41 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Aerosols; Climate change; Modelling; Radiative forcing; Climate models; Climate sensitivity; Climates; Projections; Cooling; Arctic; Model Studies; PN, Arctic DO - http://dx.doi.org/10.1175/JCLI-D-15-0362.1 ER - TY - JOUR T1 - The nature and origin of the REE mineralization in the Wicheeda Carbonatite, British Columbia, Canada AN - 1780805418; 2016-032940 AB - The Wicheeda carbonatite is a deformed plug or sill that hosts relatively high grade light rare earth elements (LREE) mineralization in the British Columbia alkaline province. It was emplaced within metasedimentary rocks belonging to the Kechika Group, which have been altered to potassic fenite near the intrusion and sodic fenite at greater distances from it. The intrusion comprises a ferroan dolomite carbonatite core, which passes gradationally outward into calcite carbonatite. The potentially economic REE mineralization is hosted by the dolomite carbonatite. Three types of dolomite have been recognized. Dolomite 1 constitutes the bulk of the dolomite carbonatite, dolomite 2 replaced dolomite 1 near veins and vugs, and dolomite 3 occurs in veins and vugs together with the REE mineralization. Carbon and oxygen isotope ratios indicate that the calcite carbonatite crystallized from a magma of mantle origin, that dolomite 1 is of primary igneous origin, that dolomite 2 has a largely igneous signature with a small hydrothermal component, and that dolomite 3 is of hydrothermal origin. The REE minerals comprise REE fluorocarbonates, ancylite-(Ce), and monazite-(Ce). In addition to dolomite 3, they occur with barite, molybdenite, pyrite, and thorite. Minor concentrations of niobium are present as magmatic pyrochlore in the calcite carbonatite. A model is proposed in which crystallization of calcite carbonatite preceded that of dolomite carbonatite. During crystallization of the latter, an aqueous-carbonic fluid was exsolved, which mobilized the REE as chloride complexes into vugs and fractures in the dolomite carbonatite, where they precipitated mainly in response to the increase in pH that accompanied fluid-rock interaction and, in the case of the REE fluorocarbonates, decreasing temperature. These fluids altered the host metasedimentary rock to potassic fenite adjacent to the carbonatite and, distal to it, they mixed with formational waters to produce sodic fenite. JF - Economic Geology and the Bulletin of the Society of Economic Geologists AU - Trofanenko, J AU - Williams-Jones, A E AU - Simandl, G J AU - Migdisov, A A Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 199 EP - 223 PB - Economic Geology Publishing Company, Lancaster, PA VL - 111 IS - 1 SN - 0361-0128, 0361-0128 KW - mineral deposits, genesis KW - isotope fractionation KW - oxygen KW - isotopes KW - igneous rocks KW - stable isotopes KW - electron probe data KW - mineral composition KW - water-rock interaction KW - mixing KW - carbon KW - metamorphic rocks KW - mineralization KW - lithogeochemistry KW - carbonatites KW - chemical composition KW - geochemistry KW - pH KW - Kechika Group KW - high-field-strength elements KW - Wicheeda Carbonatite KW - isotope ratios KW - C-13/C-12 KW - British Columbia KW - O-18/O-16 KW - paragenesis KW - models KW - Canada KW - magmas KW - metal ores KW - crystallization KW - Western Canada KW - fenite KW - rare earth deposits KW - metasomatic rocks KW - 27A:Economic geology, geology of ore deposits KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780805418?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Fluid+composition+and+mineral+reactions+at+Yellowknife+Bay%2C+Mars&rft.au=Bridges%2C+J+C%3BSchwenzer%2C+S+P%3BLeveille%2C+R%3BWestall%2C+F%3BOllila%2C+A+M%3BWiens%2C+R%3BMangold%2C+N%3BBerger%2C+G%3BMcAdam%2C+A+C%3BAnonymous&rft.aulast=Bridges&rft.aufirst=J&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://econgeol.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Society of Economic Geologists | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 86 N1 - PubXState - PA N1 - Document feature - illus. incl. 9 tables, sketch maps N1 - Last updated - 2016-04-14 N1 - CODEN - ECGLAL N1 - SubjectsTermNotLitGenreText - British Columbia; C-13/C-12; Canada; carbon; carbonatites; chemical composition; crystallization; electron probe data; fenite; geochemistry; high-field-strength elements; igneous rocks; isotope fractionation; isotope ratios; isotopes; Kechika Group; lithogeochemistry; magmas; metal ores; metamorphic rocks; metasomatic rocks; mineral composition; mineral deposits, genesis; mineralization; mixing; models; O-18/O-16; oxygen; paragenesis; pH; rare earth deposits; stable isotopes; water-rock interaction; Western Canada; Wicheeda Carbonatite DO - http://dx.doi.org/10.2113/econgeo.111.1.199 ER - TY - JOUR T1 - Forecasting and remote sensing outer belt relativistic electrons from low Earth orbit AN - 1776665736; PQ0002777307 AB - This study demonstrates the feasibility and reliability of using observations from low Earth orbit (LEO) to forecast and nowcast relativistic electrons in the outer radiation belt. We first report a high cross-energy, cross-pitch-angle coherence discovered between the trapped MeV electrons and precipitating approximately hundreds (~100s) of keV electrons-observed by satellites with very different altitudes-with correlation coefficients as high as 0.85. Based upon the coherence, we then tested the feasibility of applying linear prediction filters to LEO data to predict the arrival of new MeV electrons during geomagnetic storms, as well as their evolving distributions afterward. Reliability of these predictive filters is quantified by the performance efficiency with values as high as 0.74 when driven merely by LEO observations (or up to 0.94 with the inclusion of in situ MeV electron measurements). Finally, a hypothesis based upon the wave-particle resonance theory is proposed to explain the coherence, and a first-principle electron tracing model yields supporting evidence. Key Points * Event-specific behavior of MeV electrons can be predicted from LEO observations with high fidelity * Dominance of in situ wave-particle interactions explains cross-energy, cross-pitch-angle coherence * A new reliable and powerful approach to forecasting and nowcasting the outer belt electrons JF - Geophysical Research Letters AU - Chen, Yue AU - Reeves, Geoffrey D AU - Cunningham, Gregory S AU - Redmon, Robert J AU - Henderson, Michael G AD - Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 1031 EP - 1038 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 43 IS - 3 SN - 0094-8276, 0094-8276 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Remote Sensing KW - Prediction KW - New records KW - Correlation Coefficient KW - Correlations KW - Remote sensing KW - Radiation belts KW - Storms KW - Nowcasting KW - Dominance hierarchies KW - Wave interactions KW - Yield KW - Radiation KW - Forecasting KW - Modelling KW - Satellite Technology KW - Earth orbit KW - Filters KW - Satellite data KW - Resonance KW - Geomagnetic storms KW - Q2 09262:Methods and instruments KW - SW 0810:General KW - M2 550.38:Geomagnetism (550.38) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1776665736?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Forecasting+and+remote+sensing+outer+belt+relativistic+electrons+from+low+Earth+orbit&rft.au=Chen%2C+Yue%3BReeves%2C+Geoffrey+D%3BCunningham%2C+Gregory+S%3BRedmon%2C+Robert+J%3BHenderson%2C+Michael+G&rft.aulast=Chen&rft.aufirst=Yue&rft.date=2016-02-01&rft.volume=43&rft.issue=3&rft.spage=1031&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2015GL067481 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - New records; Prediction; Radiation; Resonance; Earth orbit; Remote sensing; Dominance hierarchies; Modelling; Wave interactions; Satellite data; Geomagnetic storms; Correlations; Radiation belts; Nowcasting; Filters; Remote Sensing; Satellite Technology; Yield; Correlation Coefficient; Forecasting; Storms DO - http://dx.doi.org/10.1002/2015GL067481 ER - TY - JOUR T1 - Sodium MRI of glioma in animal models at ultrahigh magnetic fields AN - 1776659260; PQ0002807240 AB - High magnetic fields expand our capability to use sodium MRI for biomedical applications. The central goal of this review is devoted to the unique features of sodium MRI in tumor animal models, mainly in glioma, performed at 9.4 and 21.1T. The ability of sodium MRI to monitor tumor response to therapy was evaluated. It is noteworthy that sodium MRI can detect glioma response to chemotherapy earlier than diffusion MRI. Especially attractive is the ability of sodium MRI to predict tumor therapeutic resistance before therapy. The non-invasive prediction of tumor chemo-resistance by sodium MRI presents a potential to individualize strategies for cancer treatment. Specifics of sodium MRI and technical aspects of imaging are also presented. Sodium MRI has the potential to reveal tumor chemotherapy resistance both prior to treatment and non-invasively. Application of sodium MRI may lead to individualized cancer treatment strategies, avoiding unsuccessful interventions. It can also serve as a marker for multidrug resistance and as a valuable tool for cancer drug development. JF - NMR in Biomedicine AU - Schepkin, Victor D AD - National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA. Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 175 EP - 186 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 29 IS - 2 SN - 0952-3480, 0952-3480 KW - Biotechnology and Bioengineering Abstracts KW - Sodium KW - Brain tumors KW - Magnetic fields KW - Chemotherapy KW - Magnetic resonance imaging KW - Animal models KW - Drug development KW - N.M.R. KW - Multidrug resistance KW - Tumors KW - Glioma KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1776659260?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=NMR+in+Biomedicine&rft.atitle=Sodium+MRI+of+glioma+in+animal+models+at+ultrahigh+magnetic+fields&rft.au=Schepkin%2C+Victor+D&rft.aulast=Schepkin&rft.aufirst=Victor&rft.date=2016-02-01&rft.volume=29&rft.issue=2&rft.spage=175&rft.isbn=&rft.btitle=&rft.title=NMR+in+Biomedicine&rft.issn=09523480&rft_id=info:doi/10.1002%2Fnbm.3347 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-04-13 N1 - SubjectsTermNotLitGenreText - Brain tumors; Sodium; Magnetic fields; Chemotherapy; Magnetic resonance imaging; Animal models; Multidrug resistance; N.M.R.; Drug development; Glioma; Tumors DO - http://dx.doi.org/10.1002/nbm.3347 ER - TY - JOUR T1 - A Case Study of the Weather Research and Forecasting Model Applied to the Joint Urban 2003 Tracer Field Experiment. Part 1: Wind and Turbulence AN - 1765983725; PQ0002588176 AB - (ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).Numerical-weather-prediction models are often used to supply the mean wind and turbulence fields for atmospheric transport and dispersion plume models as they provide dense horizontally- and vertically-resolved geographic coverage in comparison to typically sparse monitoring networks. Here, the Weather Research and Forecasting (WRF) model was run over the month-long period of the Joint Urban 2003 field campaign conducted in Oklahoma City and the simulated fields important to transport and dispersion models were compared to measurements from a number of sodars, tower-based sonic anemometers, and balloon soundings located in the greater metropolitan area. Time histories of computed wind speed, wind direction, turbulent kinetic energy (e), friction velocity (...), and reciprocal Obukhov length (1 / L) were compared to measurements over the 1-month field campaign. Vertical profiles of wind speed, potential temperature (...), and e were compared during short intensive operating periods. The WRF model was typically able to replicate the measured diurnal variation of the wind fields, but with an average absolute wind direction and speed difference of ... and ..., respectively. Using the Mellor-Yamada-Janjic (MYJ) surface-layer scheme, the WRF model was found to generally underpredict surface-layer TKE but overpredict ... that was observed above a suburban region of Oklahoma City. The TKE-threshold method used by the WRF model's MYJ surface-layer scheme to compute the boundary-layer height (h) consistently overestimated h derived from a ... gradient method whether using observed or modelled ... profiles. JF - Boundary-Layer Meteorology AU - Nelson, Matthew A AU - Brown, Michael J AU - Halverson, Scot A AU - Bieringer, Paul E AU - Annunzio, Andrew AU - Bieberbach, George AU - Meech, Scott AD - Los Alamos National Laboratory, MS F609, PO Box 1663, Los Alamos, NM, 87545, USA, nelsonm@lanl.gov Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 285 EP - 309 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 158 IS - 2 SN - 0006-8314, 0006-8314 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Prediction KW - Mean winds KW - Boundary layer height KW - Turbulent kinetic energy KW - turbulence KW - Wind fields KW - USA, Oklahoma, Oklahoma City KW - Plume models KW - Wind speed KW - Atmospheric transport KW - History KW - Networks KW - Anemometers KW - Forecasting KW - Sonic anemometers KW - Weather forecasting KW - Turbulence KW - Wind KW - Weather KW - Turbulence fields KW - Temperature KW - Soundings KW - Wind direction KW - Model Studies KW - Atmospheric dispersion KW - Profiles KW - Potential temperature KW - Dispersion models KW - Obukhov length KW - Dispersion KW - SW 2060:Effects on water of human nonwater activities KW - Q2 09244:Air-sea coupling KW - M2 551.509.1/.5:Forecasting (551.509.1/.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765983725?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Boundary-Layer+Meteorology&rft.atitle=A+Case+Study+of+the+Weather+Research+and+Forecasting+Model+Applied+to+the+Joint+Urban+2003+Tracer+Field+Experiment.+Part+1%3A+Wind+and+Turbulence&rft.au=Nelson%2C+Matthew+A%3BBrown%2C+Michael+J%3BHalverson%2C+Scot+A%3BBieringer%2C+Paul+E%3BAnnunzio%2C+Andrew%3BBieberbach%2C+George%3BMeech%2C+Scott&rft.aulast=Nelson&rft.aufirst=Matthew&rft.date=2016-02-01&rft.volume=158&rft.issue=2&rft.spage=285&rft.isbn=&rft.btitle=&rft.title=Boundary-Layer+Meteorology&rft.issn=00068314&rft_id=info:doi/10.1007%2Fs10546-015-0091-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Number of references - 29 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Wind speed; Prediction; Potential temperature; Anemometers; Soundings; Turbulence; Weather forecasting; Wind fields; Dispersion; Turbulence fields; Mean winds; Boundary layer height; Turbulent kinetic energy; Wind direction; Plume models; Atmospheric dispersion; Atmospheric transport; Sonic anemometers; Dispersion models; Obukhov length; Weather; History; Profiles; Networks; Temperature; Forecasting; turbulence; Wind; Model Studies; USA, Oklahoma, Oklahoma City DO - http://dx.doi.org/10.1007/s10546-015-0091-z ER - TY - JOUR T1 - Mixing in a three-phase system; enhanced production of oil-wet reservoirs by CO (sub 2) injection AN - 1812220674; 2016-072374 AB - We recreate three-phase reservoir conditions (high-pressure/temperature) using a microfluidics system and show that the use of scCO (sub 2) for restimulation operations, such as hydraulic fracturing, can enhance mixing and production. The results inform hydrocarbon extraction from deep shale formations, which has recently generated an energy boom that has lowered hydrocarbon costs. However, production decreases rapidly and methods to increase efficiency or allow restimulation of wells are needed. In our experiments, the presence of residual brine from initial production creates spatiotemporal variability in the system that causes the injected scCO (sub 2) to more effectively interact-mix with trapped hydrocarbon, thereby increasing recovery. We apply volume-averaging techniques to upscale brine saturation, which allows us to analyze the complex three-phase system in the framework of well characterized two-phase systems. The upscaled three-phase system behaves like a two-phase system: greater mixing with larger non-wetting content and higher heterogeneity. The results are contrary to previous observations in water-wet systems. Abstract Copyright Published 2016. American Geophysical Union. This article is a US Government work and is in the public domain in the United States of America. JF - Geophysical Research Letters AU - Jimenez-Martinez, Joaquin AU - Porter, Mark L AU - Hyman, Jeffrey D AU - Carey, J William AU - Viswanathan, Hari S Y1 - 2016/01/16/ PY - 2016 DA - 2016 Jan 16 SP - 196 EP - 205 PB - American Geophysical Union, Washington, DC VL - 43 IS - 1 SN - 0094-8276, 0094-8276 KW - hydraulic fracturing KW - petroleum engineering KW - well stimulation KW - pressure KW - shale KW - characterization KW - petroleum KW - production KW - cost KW - temperature KW - reservoir rocks KW - carbon dioxide KW - gas injection KW - sedimentary rocks KW - mixing KW - efficiency KW - clastic rocks KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812220674?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Mixing+in+a+three-phase+system%3B+enhanced+production+of+oil-wet+reservoirs+by+CO+%28sub+2%29+injection&rft.au=Jimenez-Martinez%2C+Joaquin%3BPorter%2C+Mark+L%3BHyman%2C+Jeffrey+D%3BCarey%2C+J+William%3BViswanathan%2C+Hari+S&rft.aulast=Jimenez-Martinez&rft.aufirst=Joaquin&rft.date=2016-01-16&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 69 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2016-08-18 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - carbon dioxide; characterization; clastic rocks; cost; efficiency; gas injection; hydraulic fracturing; mixing; petroleum; petroleum engineering; pressure; production; reservoir rocks; sedimentary rocks; shale; temperature; well stimulation DO - http://dx.doi.org/10.1002/2015GL066787 ER - TY - JOUR T1 - Three kinds of metamorphic pulses; geodynamic, thermodynamic, kinetic AN - 1873350973; 2017-013519 AB - Traditionally, metamorphism has been regarded and modeled as a slow, steady, tectonically paced process. However, new data and observations from the past decade have shown that this may not always be the case. Instead, metamorphism can be punctuated or even dominated by brief pulses. It may be that most of the physical and chemical manifestations of long-lived tectonometamorphic processes were created only during these brief pulses of activity. As evidence for such metamorphic pulses has grown, we must take care to note the differences and similarities in how we define "metamorphic pulses", both in terms of how they are caused, and how they are manifested in the rock record. We recognize a "pulse" as any process, condition, or manifestation thereof that persists or dramatically accelerates for a brief period of time (relative to the background timescale of tectonic forcing). Here, we review some of the data and categorize metamorphic pulses into three groups: geodynamic pulses, thermodynamic pulses, kinetic pulses. A geodynamic pulse results from a rapid tectonic forcing that causes P,T, or X to change rapidly thus forcing a rapid petrologic manifestation. Advective heat transfer via magma emplacement, or vertical motion near shear zones, or any passage through sharp thermal gradients (such as may exist in subduction zones) are examples of scenarios that may create geodynamic pulses. A thermodynamic pulse results from equilibrium thermodynamic effects (i.e. growth of products, consumption of reactants) when a specific net-transfer reaction is crossed, or if reaction isopleths become narrowly spaced, even with slow and steady P-T change. A kinetic pulse can occur if a thermodynamically stable reaction has been overstepped due to some kinetic barrier. Once that barrier is removed or overcome via some kinetic trigger (perhaps the introduction of a catalyzing fluid), a rapid pulse of mineral growth can result. The three types of pulses have different implications for how we model and understand metamorphism and the driving tectonic forcings behind it. JF - Abstracts with Programs - Geological Society of America AU - Baxter, Ethan F AU - Caddick, Mark J AU - Ague, Jay J AU - Dragovic, Besim AU - Pollington, Anthony D AU - Sullivan, Nora AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 27 EP - 1 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350973?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Three+kinds+of+metamorphic+pulses%3B+geodynamic%2C+thermodynamic%2C+kinetic&rft.au=Baxter%2C+Ethan+F%3BCaddick%2C+Mark+J%3BAgue%2C+Jay+J%3BDragovic%2C+Besim%3BPollington%2C+Anthony+D%3BSullivan%2C+Nora%3BAnonymous&rft.aulast=Baxter&rft.aufirst=Ethan&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Alternative states of stream form, function, and carbon storage induced by historic land use in forested watersheds of the Southern Rocky Mountains AN - 1873350931; 2017-013638 AB - The concept of alternative states in ecology recognizes that biotic community structure and function can exist in multiple states under the same environmental conditions. Multiple physical states, induced naturally and from human changes to watersheds, have been demonstrated in streams, but are rarely described explicitly as alternative states or supported by field data. We propose that the geomorphic concepts of thresholds, river metamorphosis, and complex response are the geomorphic analog to alternative states in ecology. Using field data from the Southern Rocky Mountains of Colorado and Wyoming in streams flowing through relatively unconfined valleys with old-growth forests, younger-growth, naturally disturbed forests, and forests that have undergone past land use changes (management) such as logging, we demonstrate how land use can drive streams across a threshold to induce an alternative state of significantly reduced complexity of stream and floodplain form and function, as well as reduced carbon storage in large instream and floodplain wood and instream particulate organic matter. Field data show a threshold of differences between unmanaged and managed stream segments, regardless of current forest stand age, supporting our hypothesis that the legacy effects of past land use on riparian forest characteristics leave affected watersheds in an alternative state of stream complexity and carbon storage. Complexity and retention in streams and across floodplains can maintain aquatic-riparian ecosystem functions, suggesting that the reduced state of managed watersheds can be the physical template for an alternative ecologic state with reduced carbon storage, ecosystem productivity, and biotic diversity. The cumulative effects of reduced carbon storage in mountainous environments experiencing analogous human alteration may have large implications for global carbon budgets. Maintenance of riparian forest buffers around streams in laterally unconfined valley segments is a recommended first-order restoration technique. JF - Abstracts with Programs - Geological Society of America AU - Livers, Bridget AU - Wohl, Ellen AU - Sutfin, Nicholas A AU - Jackson, Karen J AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 36 EP - 2 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350931?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Alternative+states+of+stream+form%2C+function%2C+and+carbon+storage+induced+by+historic+land+use+in+forested+watersheds+of+the+Southern+Rocky+Mountains&rft.au=Livers%2C+Bridget%3BWohl%2C+Ellen%3BSutfin%2C+Nicholas+A%3BJackson%2C+Karen+J%3BAnonymous&rft.aulast=Livers&rft.aufirst=Bridget&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Quantifying the export of floodplain soil carbon to Arctic rivers by bank erosion AN - 1873350555; 2017-013641 AB - Recent efforts to quantify terrestrial carbon budgets highlight the importance of inland waters in the transport, loss to the atmosphere, and storage of carbon. Many of the estimates of carbon loss and storage along river systems are largely based on differencing the estimated input to rivers in headwaters from the outflows at measured at river mouths. However, studies of sediment exchange between river and floodplains, on systems large and small, have reported that the total amount of sediment being moved between river and floodplains can exceed the amount being discharged at the river mouth on an annual basis. This back and forth of sediment also likely impacts the storage, release and fate of particulate carbon in systems with floodplains. Here we present the results of a study that seeks to quantify the flux of soil carbon from floodplains into rivers across the Arctic. Using satellite imagery and aerial photography collected over 4 decades, we quantified rates of lateral floodplain erosion on approximately 5,000 km of rivers in 12 Arctic watersheds. An empirical model for lateral erosion rates was developed using topographic, climatological and permafrost distribution datasets. This model was then used to extrapolate erosion rates from the measured other sections of rivers across the Arctic. This extrapolation was restricted to only rivers with detectable alluvial floodplains. We then coupled these pan-Arctic erosion estimates with recently published maps of soil carbon across permafrost regions to quantify the annualized flux of soil carbon from the upper few meters of floodplains into rivers. Preliminary results indicate that annually tens of Terragrams (Tg) of carbon enter arctic rivers from their bounding floodplains. The fate of this carbon is presently unknown. Much of the carbon may be redeposited downstream or respired to the atmosphere. However, based on limited data of particulate carbon fluxes measured at the mouths of arctic rivers, it appears that more carbon is cycled between rivers and their floodplains than is exported to the ocean. JF - Abstracts with Programs - Geological Society of America AU - Rowland, Joel C AU - Muss, Jordan AU - Shelef, Eitan AU - Stauffer, Sophie J AU - Sutfin, Nicholas A AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 36 EP - 5 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350555?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Quantifying+the+export+of+floodplain+soil+carbon+to+Arctic+rivers+by+bank+erosion&rft.au=Rowland%2C+Joel+C%3BMuss%2C+Jordan%3BShelef%2C+Eitan%3BStauffer%2C+Sophie+J%3BSutfin%2C+Nicholas+A%3BAnonymous&rft.aulast=Rowland&rft.aufirst=Joel&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Linking annual flux of floodplain sediment and organic carbon with discharge along a meandering mountain river AN - 1873350313; 2017-013639 AB - Linking floodplain response to variability in annual discharge provides insight into potential shifts in floodplain dynamics under increasing demand for freshwater and a changing climate. We use 13 historical aerial images spanning 45 years, a 0.5-m resolution aerial LIDAR dataset from 2015, field measurements of soil depth, soil samples, sediment aggradation tiles on the floodplain, and reconstructed hydrographs of the East River near Crested Butte, CO, USA to estimate net sediment and organic carbon (OC) flux in relation to discharge. Differences in river channel location are used to quantify bank erosion and lateral floodplain accretion rates within the period between 2 images. The area of deposition and vertical aggradation rate will be used to estimate the volume of accumulated sediment on the floodplain for each time interval. Net difference between volumes of eroded and deposited sediment will be used to estimate the flux of floodplain sediment within the period between aerial images. Preliminary results for the entire 13-km study reach indicate 22685 m (super 2) of lateral accretion and 25318 m (super 2) of erosion resulting in net erosion of 2633 m (super 2) between the late summer of 2013 and 2015. Using an accretion rate of 1 cm yr (super -1) , estimated from contemporary depths of fine sediment where gravel pointbars were present in 1990, and a mean measured depth of fine sediment of 57 cm along a subreach nearly equal 4 km long, we estimate that 455 m (super 3) of deposition and 14378 m (super 3) of erosion resulted in a net efflux of 13923 m (super 3) of sediment across the entire floodplain. Using a measured mean soil bulk density of nearly equal 0.86 g/cm (super 3) and soil organic carbon content of 3.5% and assuming these values represent sediment both imported and exported to the floodplain, this equates to a net efflux of carbon of 419 Mg and 1.44 Mg C ha (super -1) y (super -1) . Flows during 2014 and 2015 were relatively high compared to bankfull discharge with approximately 5- and 3-year recurrence intervals, respectively, but analysis was completed only point bars and did not account for vertical accretion across the entire floodplain. Furthermore, meander cutoffs and infilling of oxbow lakes, likely store a significant amount of organic carbon. JF - Abstracts with Programs - Geological Society of America AU - Sutfin, Nicholas A AU - Rowland, Joel C AU - Stauffer, Sophie J AU - Fratkin, Mulu AU - Williams, Kenneth H AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 36 EP - 3 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350313?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Linking+annual+flux+of+floodplain+sediment+and+organic+carbon+with+discharge+along+a+meandering+mountain+river&rft.au=Sutfin%2C+Nicholas+A%3BRowland%2C+Joel+C%3BStauffer%2C+Sophie+J%3BFratkin%2C+Mulu%3BWilliams%2C+Kenneth+H%3BAnonymous&rft.aulast=Sutfin&rft.aufirst=Nicholas&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Stress-permeability effects through shear fractures formed in the subsurface AN - 1873350285; 2017-013603 AB - The potential for permeability increase through stimulated fractures and faults in the subsurface has become a significant concern, especially as associated with induced seismicity. However, the effect of stresses on the permeability of freshly formed fractures is not yet well understood. In this study, we use X-ray imaging to directly observe fracture initiation and propagation through rock at stressed conditions and we couple this information with simultaneous permeability testing. Fractures were created using a triaxial direct-shear method through initially intact specimens of fine-grained Utica shale. X-ray computed tomography images of a specimen that was fractured at 22 MPa confining stress and observed at stressed conditions, indicate that significant shear deformation can be accommodated by distributed fracturing and communition of the rock, all without creating a hydraulically connected fracture aperture pathway or significantly enhanced permeability. However, in experiments at lower confining stress (3.5 MPa), significant permeability increases of 2 to 4 orders of magnitude were observed in which discrete hydraulically open fractures were created by shear and propped open by asperities. Results from our experiments show that even moderate-stress conditions can reduce or inhibit permeability enhancement of shear-stimulated fractures. These results highlight the challenges of stimulating permeability in hydraulic fracturing operations, while illustrating the potential resilience of caprock. JF - Abstracts with Programs - Geological Society of America AU - Frash, Luke AU - Carey, J William AU - Viswanathan, Hari AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 33 EP - 6 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350285?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Stress-permeability+effects+through+shear+fractures+formed+in+the+subsurface&rft.au=Frash%2C+Luke%3BCarey%2C+J+William%3BViswanathan%2C+Hari%3BAnonymous&rft.aulast=Frash&rft.aufirst=Luke&rft.date=2016-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Oceanographic redox changes associated with the Late Silurian Lau event as evidenced from the Brownsport Formation, Tennessee AN - 1873349181; 2017-014163 AB - The late Silurian is characterized by global oceanographic and biotic changes related to the Lau carbon isotope excursion (CIE). The Lau CIE is well documented in areas such as Sweden, Ukraine, Australia, and North America. This excursion is one of the largest positive carbon isotope excursions in the Phanerozoic, +8 ppm or greater in some localities. The associated Lau-Kozlowski extinction event (LKE), was initially defined by conodonts and graptolites, but has also been confirmed in many other prevalent marine fauna, and is the most severe and widespread documented biotic event in the Silurian. Importantly, the LKE is known for having anachronistic facies comparable to those associated with larger mass extinction events such as the Permo-Triassic. The causes and consequences of this extinction event are not well understood with most work hypothesizing changes in the global carbon cycle, redox conditions and/or eustatic sea level. Here we report new paired delta (super 34) S (sub CAS) and delta (super 13) C (sub carb) analyses from the Brownsport Formation, central Tennessee. This data will help to elucidate the temporal variation of the global carbon cycle and the duration of such a perturbation. Generally, positive excursions in both the delta (super 13) C and delta (super 34) S data would indicate that the carbon isotope excursion was caused by the global burial of organic matter and pyrite. An expansion of euxinia is required to have a dramatic delta (super 34) S excursion and could have been a fundamental factor in the extinction event. A positive excursion in only the delta (super 13) C data could be indicative of either anoxia leading to the burial of organic matter or the weathering of a carbonate platform and thus not largely tied to ocean oxygenation like that of oceanic anoxic events. This can be further clarified by the use of the I/Ca proxy. Additionally, we will analyze the section for I/Ca to fingerprint local temporal changes dissolved O (sub 2) concentrations. This study has identified the Lau CIE in a new roadcut in central Tennessee, with heaviest values (+4.7 ppm) from the "Bob" Member of the Brownsport Formation. For the first time we present new delta (super 34) S and I/Ca data. This study begins to test whether the Lau CIE was the result of the increased burial of organic carbon as a result of anoxia/euxinia or the weathering of a subaerial carbonate platform as a result of eustatic sea level fall. JF - Abstracts with Programs - Geological Society of America AU - Bowman, Chelsie N AU - Young, Seth A AU - Owens, Jeremy AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 240 EP - 10 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 02C:Geochemistry of rocks, soils, and sediments KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873349181?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Oceanographic+redox+changes+associated+with+the+Late+Silurian+Lau+event+as+evidenced+from+the+Brownsport+Formation%2C+Tennessee&rft.au=Bowman%2C+Chelsie+N%3BYoung%2C+Seth+A%3BOwens%2C+Jeremy%3BAnonymous&rft.aulast=Bowman&rft.aufirst=Chelsie&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Increasing the production efficiency and reducing the water requirements for hydraulic fracturing AN - 1873348363; 2017-013607 AB - Shale gas is an unconventional fossil energy resource profoundly impacting US energy independence and is projected to last for at least 100 years. Production of methane and other hydrocarbons from low permeability shale involves hydraulic fracturing of rock, establishing fracture connectivity, and multiphase fluid-flow and reaction processes all of which are poorly understood. The result is inefficient extraction with many environmental concerns. A science-based capability is required to quantify the governing mesoscale fluid-solid interactions, including microstructural control of fracture patterns and the interaction of engineered fluids with hydrocarbon flow. These interactions depend on coupled thermo-hydro-mechanical-chemical (THMC) processes over scales from microns to tens of meters. Determining the key mechanisms in subsurface THMC systems has been impeded due to the lack of sophisticated experimental methods to measure fracture aperture and connectivity, multiphase permeability, and chemical exchange capacities at the high temperature, pressure, and stresses present in the subsurface. In this study, we developed and prototyped the microfluidic and triaxial core flood experiments required to reveal the fundamental dynamics of fracture-fluid interactions. The goal is transformation of hydraulic fracturing from present ad hoc approaches to science-based strategies while safely enhancing production. Specifically, we have demonstrated an integrated experimental/modeling approach that allows for a comprehensive characterization of fluid-solid interactions and develop models that can be used to determine the reservoir operating conditions necessary to gain a degree of control over fracture generation, fluid flow, and interfacial processes over a range of subsurface conditions. JF - Abstracts with Programs - Geological Society of America AU - Viswanathan, Hari AU - Carey, J William AU - Rougier, Esteban AU - Porter, Mark AU - Karra, Satish AU - Kang, Qinjun AU - Hyman, Jeffrey AU - Martinez, Joaquin Jimenez AU - Lei, Zhou AU - Makedonska, Nataliia AU - Frash, Luke AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 33 EP - 10 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873348363?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Increasing+the+production+efficiency+and+reducing+the+water+requirements+for+hydraulic+fracturing&rft.au=Viswanathan%2C+Hari%3BCarey%2C+J+William%3BRougier%2C+Esteban%3BPorter%2C+Mark%3BKarra%2C+Satish%3BKang%2C+Qinjun%3BHyman%2C+Jeffrey%3BMartinez%2C+Joaquin+Jimenez%3BLei%2C+Zhou%3BMakedonska%2C+Nataliia%3BFrash%2C+Luke%3BAnonymous&rft.aulast=Viswanathan&rft.aufirst=Hari&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Fate and transport of RDX and its degradation products in soils of the Bandelier Tuft, Los Alamos New Mexico AN - 1873347709; 2017-014050 AB - High explosive compounds including hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) were used extensively in weapons research and testing at Los Alamos National Laboratory (LANL). Waste from the manufacture and testing of weapons components containing RDX was released directly to the surface of Canon de Valle at LANL's Technical Area 16, resulting in the contamination of the alluvial, intermediate and regional groundwater aquifers. Monitoring of groundwater wells within Canon de Valle have shown persistent RDX contamination in deep perched intermediate groundwater, located between 650 and 1200 feet below ground surface. Batch and column experiments were conducted to determine the extent of adsorption-desorption and transport of RDX and its degradation products MNX, DNX, and TNX in three subsurface materials that intercept segments of the RDX plume. The three core segments examined are representatives of the Otowi member of the Bandelier tuff, and the underlying alluvial fan deposits of the Puye formation. All experiments were performed using water obtained from a well located at the center of the plume, which is fairly oxic and has a neutral pH of 7.5. Transport results for RDX, MNX, DNX and TNX were fairly consistent and showed significant retardation of these compounds relative to a bromide tracer. Preliminary processing of the data revealed retardation factors up to 3.3, which are significantly higher than those observed in studies of the movement of RDX though shallow groundwater aquifers. The most significant retardation factors for these compounds were observed in the pumice-rich Otowi material. A reactive transport model is being developed to predict the subsurface migration of RDX in the vadose zone and in groundwater utilizing the first-order sorption and degradation parameters. Recommendations for future work include conducting laboratory and field studies of in-situ treatment options to remediate RDX in groundwater. JF - Abstracts with Programs - Geological Society of America AU - Heerspink, Brent P AU - Boukhalfa, Hakim AU - Ware, Stuart D AU - Marina, Oana C AU - Reimus, Paul W AU - Wolde Gabriel, Giday AU - Pandey, Sachin AU - Vesselinov, Velimir AU - Goering, Tim J AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 215 EP - 7 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873347709?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Fate+and+transport+of+RDX+and+its+degradation+products+in+soils+of+the+Bandelier+Tuft%2C+Los+Alamos+New+Mexico&rft.au=Heerspink%2C+Brent+P%3BBoukhalfa%2C+Hakim%3BWare%2C+Stuart+D%3BMarina%2C+Oana+C%3BReimus%2C+Paul+W%3BWolde+Gabriel%2C+Giday%3BPandey%2C+Sachin%3BVesselinov%2C+Velimir%3BGoering%2C+Tim+J%3BAnonymous&rft.aulast=Heerspink&rft.aufirst=Brent&rft.date=2016-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine (RDX) natural attenuation and active bioremediation AN - 1873347329; 2017-014045 AB - RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) is a widely-used high explosive compound which has been detected in soil and groundwater around military sites, at manufacturing and testing sites including Los Alamos National Laboratory. RDX has toxicological effects on the central nervous system, and the EPA has established a drinking water health advisory for RDX. Remediation strategies are being sought to reduce the risk of exposure to environmental receptors. In this study, we focused on identifying biotic and abiotic processes that contribute to the attenuation of RDX in groundwater at Technical Area 16 (TA-16) at Los Alamos National Laboratory, and to identify microbial signatures of RDX degradation in groundwater. We tested the potential use of OSORB (super R) samplers available through ABS Materials Inc., (Wooster,OH) to concentrate RDX and its degradation products by deploying the samplers in monitoring wells completed in contaminated groundwater at TA-16. Our data indicate that under site-specific conditions at LANL, the OSORB (super R) samplers multiplied RDX concentrations observed in groundwater by a factor of 10. We also observed that the ratio of MNX/RDX concentration was higher in OSORB (super R) samplers relative to values obtained by directly analyzing the water, suggesting that the OSORB (super R) samplers may be a more conservative approach for sampling RDX degradation products. A second series of field tests was conducted at TA-16 by deploying the OSORB (super R) samplers in the shallow and deeper groundwater for a relatively-long period of 3 months. Data from the second deployment showed that RDX degradation is presently occurring, but at a very slow rate. Biostimulation column tests were conducted in the laboratory to identify nutrients and microorganisms that could enhance RDX degradation. The results demonstrated that vegetable oil promotes RDX degradation under anaerobic conditions. The results of this study expand our current understanding of the natural attenuation of RDX, the nutrient requirements for biodegradation, and the microbial ecology in RDX-contaminated groundwater at TA-16. The results provide valuable information regarding the importance of key nutrients and microbes in the biodegradation process. JF - Abstracts with Programs - Geological Society of America AU - Marina, Oana C AU - Martinez, Bennie A AU - Goering, Tim J AU - Wang, Dongping AU - Rearick, Michael S AU - Boukhalfa, Hakim AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 215 EP - 2 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873347329?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Hexahydro-1%2C+3%2C+5-trinitro-1%2C+3%2C+5-triazine+%28RDX%29+natural+attenuation+and+active+bioremediation&rft.au=Marina%2C+Oana+C%3BMartinez%2C+Bennie+A%3BGoering%2C+Tim+J%3BWang%2C+Dongping%3BRearick%2C+Michael+S%3BBoukhalfa%2C+Hakim%3BAnonymous&rft.aulast=Marina&rft.aufirst=Oana&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Deciphering a structural change at 11 Ma in the evolution of a classic transfer fault zone, the southern Embudo fault system in north-central New Mexico AN - 1869034048; 2017-010346 AB - In the late Neogene, the Embudo fault system (EFS) served as a classic transfer structure in accommodating extensional strain between the oppositely tilted San Luis and Espanola Basins of the northern Rio Grande rift. We emphasize a major change in structural configuration that occurred ca. 11 Ma on the southern half of this fault system, which accompanied a previously documented inward focusing of extensional strain from border faults of the northwestern Espanola Basin (EB) onto the southern EFS. Prior to 11 Ma, what became the EFS in the northern EB consisted of the NE-trending Velarde graben (VG) bounded by normal or normal-oblique faults, at least one of which was active in early rifting. After 11 Ma, throw rates of VG bounding faults and stratal accumulation rates within the graben decreased. Concomitant with these changes, we postulate that a mapped NE-striking, left-lateral oblique (NW-down) fault developed along the axis of the VG. This fault terminates southward at a E-W syncline, where there is a 2 km right step-over to a ESE-down, normal-oblique fault (Santa Clara fault of the EFS) that continues southward and forms the northeast margin of the Santa Clara graben. On the northern Santa Clara fault, stratigraphic markers indicate lower throw rates during 11-8 Ma compared to 8.5-3.5 Ma. We propose that previously reported high extensional strain rates at 15-10 Ma promoted NE-directed growth of VG eastern border faults along a pre-existing, NE-trending crustal weakness (Jemez lineament) and eventual hard linkage with the master fault(s) of the San Luis Basin half graben. This created an effective transfer fault following what previously may have been a more complex, broader transverse accommodation zone. Strain was then concentrated on the southern EFS from the northwestern EB border faults and from VG border faults -- resulting in a ca. 11 Ma unconformity and 11-9 Ma compressed stratigraphic section on the immediate footwalls of the northern Santa Clara fault and the western bounding fault of the VG. Increased strain rates on the southern EFS may also have facilitated extensive basaltic volcanism and the associated Rio del Oso dike swarm southwest of the VG; intrusion of the latter possibly reduced local extensional stresses and temporarily decreased throw rates on the northern Santa Clara fault until 10-8 Ma. JF - Abstracts with Programs - Geological Society of America AU - Koning, Daniel J AU - Baldridge, W Scott AU - Ferguson, John F AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 54 EP - 6 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869034048?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Deciphering+a+structural+change+at+11+Ma+in+the+evolution+of+a+classic+transfer+fault+zone%2C+the+southern+Embudo+fault+system+in+north-central+New+Mexico&rft.au=Koning%2C+Daniel+J%3BBaldridge%2C+W+Scott%3BFerguson%2C+John+F%3BAnonymous&rft.aulast=Koning&rft.aufirst=Daniel&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-02-17 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Long distance observations with the ChemCam remote micro-imager; Mount Sharp and related sedimentary deposits on Gale crater floor? AN - 1869033040; 2017-011706 AB - A major question for Gale Crater (age 3.6 BY), is whether some deposits in the central mound (informally Mt. Sharp) originally extended across the crater floor, prior to the deposition of Peace Vallis and other fans at 3.2 BY. Orbital images show partly eroded deposits in the vicinity of the Peace Vallis fan and as yardangs on Mt. Sharp, but their nature- aeolian, fluvial, or impact-related - is not obvious. Curiosity's ChemCam includes a Remote Micro-Imager (RMI) to provide context for the laser pits, and to obtain high resolution long-range images from the rover perspective. Use of the RMI has been enhanced by a new autofocus algorithm using onboard analysis of RMI images. The RMI has the finest pixel scale on the rover with 19.6 mu rad/pixel (1024x1024 grayscale), compared to Mastcam M100 color images (74 mu rad/pixel), although ChemCam optics somewhat degrade the useful RMI resolution. The theoretical pixel scale for RMI images is nearly equal 2 cm at 1 km, and nearly equal 26 cm at 12 km, beyond which HiRISE orbital resolution (25 cm/pixel) is better. Note: resolution of geological features requires 3-5 pixels. Long distance RMI images show planar beds in eroded yardangs on Mt. Sharp. Images were also obtained of partly eroded sediments in the vicinity of, but predating the Peace Vallis fan. The RMI of these deposits near the west edge of the fan confirm the presence of eroded buttes with up to 8-10 horizontal layers (0.8-1.6 m thick), consistent with a sedimentary origin. The layered buttes rise as much as 12 meters above the surrounding deposits. The surrounding deposits embay the lower portions of the buttes and are probably a phase of the Peace Vallis fan. RMI images of blocks in this fan unit about 50-80 cm across are consistent with enhanced retention of craters previously noted for this unit. Another RMI observation just above the Peace Vallis channel shows an eroded bench, that could indicate sediments deposited prior to Peace Vallis fan or entrenched early fan deposits. Conclusions - The RMI images are clarifying the sedimentary origin of materials on Mt. Sharp and on the crater floor near the Peace Vallis fan. The sediments near the Peace Vallis fan are highly eroded, are of unknown original thickness, and may be related to deposits in Mt. Sharp. The high resolution RMI images from the rover's perspective are a powerful tool for geological analysis at Gale Crater. JF - Abstracts with Programs - Geological Society of America AU - Newsom, Horton E AU - Gasnault, Olivier AU - Le Mouelic, Stephane AU - Mangold, N AU - Le Deit, Laetitia AU - Wiens, R C AU - Anderson, Ryan B AU - Edgar, Lauren A AU - Herkenhoff, Ken E AU - Johnson, Jeffrey R AU - Jacob, Samantha R AU - Gupta, Sanjeev AU - Grotzinger, John P AU - Bridges, Nathan T AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 20 EP - 7 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869033040?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Long+distance+observations+with+the+ChemCam+remote+micro-imager%3B+Mount+Sharp+and+related+sedimentary+deposits+on+Gale+crater+floor%3F&rft.au=Newsom%2C+Horton+E%3BGasnault%2C+Olivier%3BLe+Mouelic%2C+Stephane%3BMangold%2C+N%3BLe+Deit%2C+Laetitia%3BWiens%2C+R+C%3BAnderson%2C+Ryan+B%3BEdgar%2C+Lauren+A%3BHerkenhoff%2C+Ken+E%3BJohnson%2C+Jeffrey+R%3BJacob%2C+Samantha+R%3BGupta%2C+Sanjeev%3BGrotzinger%2C+John+P%3BBridges%2C+Nathan+T%3BAnonymous&rft.aulast=Newsom&rft.aufirst=Horton&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-02-17 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - The kISMET (permeability (K) and induced seismicity management for energy technologies) project; an underground field laboratory for investigating the relations between natural and induced fractures, stress field, and rock fabric AN - 1869032103; 2017-011506 AB - kISMET is part of the US Department of Energy's Subsurface Technology & Engineering Research (SubTER) crosscutting initiative for adaptive control of fractures, reactions, and flow in the subsurface. The project is located at the Sanford Underground Research Facility (SURF) in the former Homestake gold mine in Lead, SD. The kISMET site consists of five closely spaced near-vertical boreholes on the 4850 level that are designed for a series of hydraulic fracturing stress measurements and induced-fracture stimulation experiments. Four of the boreholes are HQ-sized holes that are 50 m in depth and will host monitoring sensors; in conjunction with a central NQ borehole they form a five-spot pattern at depth. The monitoring boreholes are located nearly equal 3 m away from the central borehole, allowing for very precise monitoring of fracture initiation and growth. The host rock is the Poorman Formation, a highly foliated phyllite that is steeply dipping at the kISMET site. Initial characterization of the site is being conducted using core samples, televiewer logs, and extensive preexisting geologic data. A straddle packer assembly will be installed at several depths in the central borehole to conduct stress measurements, and later to perform a series of hydrofracture stimulations. Preliminary analytical and numerical fracture initiation and growth model simulations conducted using existing geomechanical data for the Poorman phyllite suggest rock breakdown pressures in the range of 35-50 MPa. Two primary methods will be employed to monitor the experiments: continuous active-source seismic monitoring (CASSM) and electrical resistivity tomography (ERT); these will be complemented by passive microseismic (MEQ), pore pressure and injection rate monitoring. These experiments are aimed at understanding the effects of stress state, rock fabric, existing fractures, and stimulation approach on the character of the fracture(s) created (e.g., permeability enhancement, size, orientation, aperture), the fracturing process, and the associated induced microseismicity. Results of this research will be directly applicable to fracture stimulation and reservoir creation in Enhanced Geothermal Systems (EGS). JF - Abstracts with Programs - Geological Society of America AU - Dobson, Patrick F AU - Oldenburg, Curtis M AU - Daley, Thomas M AU - Birkholzer, Jens T AU - Cook, Paul J AU - Ajo-Franklin, Jonathan AU - Rutqvist, Jonny AU - Siler, Drew L AU - Kneafsey, Timothy J AU - Nakagawa, Seiji AU - Wu, Yuxin AU - Guglielmi, Yves AU - Ulrich, Craig AU - Wang, Herb F AU - Haimson, Bezalel C AU - Sone, Hiroki AU - Vigilante, Peter AU - Roggenthen, William M AU - Doe, Thomas W AU - Lee, Moo Y AU - Mattson, Earl D AU - Huang, Hai AU - Johnson, Timothy J AU - Morris, Joseph P AU - White, Joshua A AU - Johnson, Paul A AU - Coblentz, David D AU - Heise, Jaret AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 4 EP - 9 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 27A:Economic geology, geology of ore deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869032103?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=The+kISMET+%28permeability+%28K%29+and+induced+seismicity+management+for+energy+technologies%29+project%3B+an+underground+field+laboratory+for+investigating+the+relations+between+natural+and+induced+fractures%2C+stress+field%2C+and+rock+fabric&rft.au=Dobson%2C+Patrick+F%3BOldenburg%2C+Curtis+M%3BDaley%2C+Thomas+M%3BBirkholzer%2C+Jens+T%3BCook%2C+Paul+J%3BAjo-Franklin%2C+Jonathan%3BRutqvist%2C+Jonny%3BSiler%2C+Drew+L%3BKneafsey%2C+Timothy+J%3BNakagawa%2C+Seiji%3BWu%2C+Yuxin%3BGuglielmi%2C+Yves%3BUlrich%2C+Craig%3BWang%2C+Herb+F%3BHaimson%2C+Bezalel+C%3BSone%2C+Hiroki%3BVigilante%2C+Peter%3BRoggenthen%2C+William+M%3BDoe%2C+Thomas+W%3BLee%2C+Moo+Y%3BMattson%2C+Earl+D%3BHuang%2C+Hai%3BJohnson%2C+Timothy+J%3BMorris%2C+Joseph+P%3BWhite%2C+Joshua+A%3BJohnson%2C+Paul+A%3BCoblentz%2C+David+D%3BHeise%2C+Jaret%3BAnonymous&rft.aulast=Dobson&rft.aufirst=Patrick&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-02-17 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Thermal Behavior of Polyhalite: A Mineral Relevant to Salt Repository AN - 1861113350; 782780-82 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Xu, H AU - Guo, X AU - Bai, J AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 3482 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861113350?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Thermal+Behavior+of+Polyhalite%3A+A+Mineral+Relevant+to+Salt+Repository&rft.au=Xu%2C+H%3BGuo%2C+X%3BBai%2C+J%3BAnonymous&rft.aulast=Xu&rft.aufirst=H&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=3482&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/3482.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2016 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Microbial processes that impact iodine speciation at environmentally relevant concentrations AN - 1861112574; 782781-91 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Yeager, Chris M AU - Grandbois, Russell AU - Li, Hsiu-Ping AU - Xu, Chen AU - Zhang, Saijin AU - Schwehr, Kathleen A AU - Santschi, Peter H AU - Kaplan, Daniel I AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 3591 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861112574?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Microbial+processes+that+impact+iodine+speciation+at+environmentally+relevant+concentrations&rft.au=Yeager%2C+Chris+M%3BGrandbois%2C+Russell%3BLi%2C+Hsiu-Ping%3BXu%2C+Chen%3BZhang%2C+Saijin%3BSchwehr%2C+Kathleen+A%3BSantschi%2C+Peter+H%3BKaplan%2C+Daniel+I%3BAnonymous&rft.aulast=Yeager&rft.aufirst=Chris&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=3591&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/3591.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2016 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Role of natural organic matter on iodine and Pu distribution and mobility in environmental samples from the northwestern Fukushima Prefecture AN - 1861112515; 782780-79 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Xu, C AU - Zhang, S AU - Sugiyama, Y AU - Ohte, N AU - Ho, Y F AU - Fujitake, N AU - Kaplan, D I AU - Yeager, C M AU - Schwehr, K A AU - Santschi, P H AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 3479 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861112515?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Role+of+natural+organic+matter+on+iodine+and+Pu+distribution+and+mobility+in+environmental+samples+from+the+northwestern+Fukushima+Prefecture&rft.au=Xu%2C+C%3BZhang%2C+S%3BSugiyama%2C+Y%3BOhte%2C+N%3BHo%2C+Y+F%3BFujitake%2C+N%3BKaplan%2C+D+I%3BYeager%2C+C+M%3BSchwehr%2C+K+A%3BSantschi%2C+P+H%3BAnonymous&rft.aulast=Plesko&rft.aufirst=C&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/3479.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2016 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Predicting cutoff locations along meander bends on the East River in Crested Butte, Colorado AN - 1861110821; 787345-65 AB - The East River is a snow-melt dominated, meandering, mountain river that flows through Crested Butte, Colorado. Lidar and Worldview 2 multispectral satellite imagery collected in 2015 revealed approximately 100 abandoned channels in our 10 kilometer long study reach that occupy approximately 25% of the floodplain. Abandoned channels preserve the shape of former river meander bends. The imagery was also used to identify headcuts on several bends that could erode to become chute cutoffs under the proper flow conditions. Linear regression was used to extend discharge data along the study reach to 1934 using a USGS gauge station at the East River in Almont, Colorado. Fifteen satellite and aerial images spanning 60 years were used to count the number of cutoffs in each image and relate it to the peak and mean discharge for that time period. Field measurements are being collected at current bends with and without headcuts and chute channels to provide information for an empirical model to identify the probability of cutoff formation. Our preliminary model incorporates soil depth, grain size, meander neck length, bend orientation, peak and mean discharge, slope, erosion rates, and sinuosity to predict at which bends a cutoff will likely form. The slope along the meander neck and the orientation of the neck relative to the valley slope could influence the surface flow direction and likelihood of a chute cutoff. Beaver activity along the East River complicates cutoff prediction if water is re-routed over a dam or along a beaver trail that intersects a meander bend. The only cutoff to occur between 2013 and 2015 formed along a bend containing a beaver dam and additional past cutoffs have occurred where beaver dams were present in historical imagery. One cutoff formed between 2009 and 2011, three cutoffs formed between 2005 and 2009, and three cutoffs formed between 1990 and 2005. This study is made possible by the temporal data sets it combines, and reflects the evolution of cutoffs in the river landscape over time. JF - Abstracts with Programs - Geological Society of America AU - Stauffer, Sophie J AU - Rowland, Joel C AU - Sutfin, Nicholas A AU - Fratkin, Mulu AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 59 EP - 36 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861110821?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Predicting+cutoff+locations+along+meander+bends+on+the+East+River+in+Crested+Butte%2C+Colorado&rft.au=Stauffer%2C+Sophie+J%3BRowland%2C+Joel+C%3BSutfin%2C+Nicholas+A%3BFratkin%2C+Mulu%3BAnonymous&rft.aulast=Stauffer&rft.aufirst=Sophie&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Mapping the state of stress from the plate- to reservoir-scale; implications and challenges AN - 1861110653; 787345-14 AB - Adaptive control of subsurface fractures and fluid flow is a crosscutting challenge being addressed by the new DOE Subsurface Technology and Engineering Research, Development, and Demonstration (SubTER) Crosscut initiative that has the potential to transform subsurface energy production and waste storage strategies. A critical aspect of this initiative is improving our understanding of the tectonic influence on the state of stress. The state of stress exerts important controls on in-situ reservoir geomechanics activities (e.g., fracture orientation, fluid flow, wellbore breakout, fault failure, etc.), and yet we lack the quantitative means to measure it. This issue is becoming increasingly important in light of the fact that the subsurface provides more than 80 percent of the energy used in the U.S. and is a potentially a vast reservoir for CO (sub 2) , nuclear waste, and energy storage. Until recently, present-day crustal stresses were widely thought to be oriented parallel to plate motion and thus controlled by plate boundary forces. However, recent stress and GPS data reveal that stresses are not aligned with plate motion in many regions (Australia, Europe, South America, Asia), suggesting a strong influence of intra-plate forces on the tectonic stress pattern. Here we combine information from the World Stress Map dataset with numerical modeling to evaluate the tectonic influence on the state of stress in a plate with good alignment between plate motion and the observed SHmax orientation (North America). The plate-scale stresses establish the background or ambient state of stress that is locally modulated at the reservoir-scale by material and structural features. Evaluation of this stress modulation and its influence on fault and fracture dynamics is facilitated by the use of high fidelity geologic framework models (GFMs) that integrate geologic data, provide numerical meshes for geomechanical modeling, and provide the means to conduct uncertainty quantification. An important utility of GFMs is their use for identifying critically stressed faults and evaluating seismic hazard associated with anthropogenic subsurface activities. The goal of this work is to develop regional stress maps that can inform parties of interest to plan and prepare more effectively. JF - Abstracts with Programs - Geological Society of America AU - Snelson, Catherine M AU - Coblentz, David AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 57 EP - 3 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861110653?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Mapping+the+state+of+stress+from+the+plate-+to+reservoir-scale%3B+implications+and+challenges&rft.au=Snelson%2C+Catherine+M%3BCoblentz%2C+David%3BAnonymous&rft.aulast=Snelson&rft.aufirst=Catherine&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Detection limit of sequential leaching method for assessing small amounts of chromium retardation in subsurface AN - 1861109264; 787353-94 AB - Retardation is an important process that can slow down the aqueous transport of hexavalent chromium, Cr(VI), either by adsorption of Cr(VI) to sediments, or by reduction to immobile trivalent chromium, Cr(III). In previous (Musa et al., 2015) and ongoing studies, sequential leaching tests were performed on chromium contaminated sediments and non-contaminated sediments from the regional aquifer beneath Los Alamos National Laboratory to look for evidence of retardation of chromium on the contaminated sediments. In this study, the detection limit of the sequential leaching method was determined using bentonite and biotite, representing two types of minerals present in the aquifer that could potentially reduce or adsorb the chromium. Prior to the sequential leaching tests, the bentonite and biotite samples were exposed to potassium dichromate solutions with concentrations of 5, 2, 1, 0.5, and 0.2 ppm, respectively. The last three concentrations corresponding to those of the Cr(VI) concentrations measured in groundwater within the plume. The samples were then leached sequentially for three days with 0.01 M nitric acid followed by three days of 0.1 M nitric acid, to remove the chromium.aBy carefully measuring the amount of chromium that became associated with the bentonite and biotite samples during the exposures to dichromate solutions, we could assess how much of the non-natural chromium was leached during each sequential leaching step. A leaching of blank samples, not exposed to chromium, yielded a correction for background levels to determine how much and in which steps the natural chromium might be leached. Quantifying the retardation of chromium in the regional aquifer will help develop an integrated remediation strategy for the chromium plume. JF - Abstracts with Programs - Geological Society of America AU - Musa, Dea AU - Harris, Rose AU - Lawver, Angela AU - Perkins, George AU - Ding, Mei AU - Reimus, Paul W AU - Katzman, Danny AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 119 EP - 11 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861109264?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Detection+limit+of+sequential+leaching+method+for+assessing+small+amounts+of+chromium+retardation+in+subsurface&rft.au=Musa%2C+Dea%3BHarris%2C+Rose%3BLawver%2C+Angela%3BPerkins%2C+George%3BDing%2C+Mei%3BReimus%2C+Paul+W%3BKatzman%2C+Danny%3BAnonymous&rft.aulast=Musa&rft.aufirst=Dea&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - A comprehensive study supporting beneficial uses of produced water in southeastern New Mexico AN - 1861109251; 787353-89 AB - We undertook a comprehensive inventory, quality evaluation, spatial variability analysis, volume analysis, and regulatory review of produced water in two southeastern counties (Lea and Eddy Counties) of New Mexico. This region is chronically water stressed and has experienced extensive development of oil and gas operations over the last 10 years. Use, reuse, and beneficial use of produced water both within and outside of the oil and gas industry can help reduce the use of fresh water for drilling, completions, and other important economic activities including mining and possibly agriculture or irrigation. We developed an updated database of produced water information including location information, water quality analyses, formation (where known), and source of sample (where known). New and non-compiled data are important to realize the full potential of produced water as an alternative water source, thus a data gap analysis was also performed. Additionally, the results of the spatial variability study, as well as information from the produced water database, were developed into GIS maps and spatial data layers. The map layers show the distribution of 1) produced water quality by geologic formation; 2) produced water volumes by well and township; and, 3) produced water volumes through time. A review of the regulatory framework for developing produced water for alternative uses was also performed, including state regulations, permits for treatment and use, the water rights framework, and pertinent federal regulations surrounding discharges.aThe study analyzed produced water volume, quality, and treatment options for agricultural purposes and focused on four of the most economically advantageous agronomic crops as well as potential niche market crops. Finally, we created web-mapping applications to locate potential customers for produced water; and to identify potential delivery routes. JF - Abstracts with Programs - Geological Society of America AU - Sullivan Graham, Enid J AU - Fernald, Sam AU - Sabie, Robert P AU - Flynn, Robert AU - Xu, Pei AU - Carroll, Kenneth AU - Cather, Martha AU - Sarpong, Kwabena Addae AU - Ma, Guanyu AU - Tellez, Aracely AU - Chaudhary, Binod AU - Willman, Spencer AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 119 EP - 6 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861109251?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=A+comprehensive+study+supporting+beneficial+uses+of+produced+water+in+southeastern+New+Mexico&rft.au=Sullivan+Graham%2C+Enid+J%3BFernald%2C+Sam%3BSabie%2C+Robert+P%3BFlynn%2C+Robert%3BXu%2C+Pei%3BCarroll%2C+Kenneth%3BCather%2C+Martha%3BSarpong%2C+Kwabena+Addae%3BMa%2C+Guanyu%3BTellez%2C+Aracely%3BChaudhary%2C+Binod%3BWillman%2C+Spencer%3BAnonymous&rft.aulast=Sullivan+Graham&rft.aufirst=Enid&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Assessing natural retardation of chromium by sequential leaching of contaminated and uncontaminated sediments AN - 1861109177; 787353-93 AB - Hexavalent chromium was used as a corrosion inhibitor in Los Alamos National Laboratory power-plant cooling towers between 1956 and 1972. It was released aas daily blowdown into effluent that discharged into a canyon. A complex infiltration pathway resulted in contamination within a deep alluvial aquifer approximately 1000 feet below ground surface. The highest concentration of chromium within the plume is nearly equal 1,000 ppb, compared to the New Mexico drinking water standard of 50 ppb. Natural retardation of Cr(VI) in the aquifer is being evaluated so that it can be properly accounted for in developing a remediation strategy. Elevated levels of chromium (III) in sediments taken from areas of high aqueous Cr(VI) concentrations in the aquifer are potentially an indicator of natural retardation. In a preliminary sequential leaching study, samples taken from chromium-contaminated areas of the aquifer were evaluated. Sample splits were leached three times with a weak alkaline solution (0.05 M sodium bicarbonate and 0.05 M carbonate), and the other split was leached three times with 0.01 M nitric acid. The samples that had been leached with 0.01 M nitric acid were sequentially leached three times with 0.1 M nitric acid. The alkaline solution was intended to desorb chromium (VI) from the sediments, and the acid solutions were intended to extract chromium (III) in successively greater amounts. The levels of chromium (III) leached from the contaminated sediments were barely elevated, if at all, above levels that were leached from similar sediments taken from uncontaminated regions of the aquifer, making it difficult to determine whether the leached Cr(III) was natural or anthropogenic. Therefore, a second leaching study was performed using a large number of uncontaminated samples to assess the variability in background levels of acid-leachable Cr(III) within the aquifer. We will present the results of this study and discuss their implications with respect to distinguishing between natural and anthropogenic Cr(III) in sequential leaching experiments. JF - Abstracts with Programs - Geological Society of America AU - Harris, Rose AU - Reimus, Paul W AU - Ding, Mei AU - Musa, Dea AU - Lawver, Angela AU - WoldeGabriel, Giday AU - Perkins, George AU - Katzman, Danny AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 119 EP - 10 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861109177?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Assessing+natural+retardation+of+chromium+by+sequential+leaching+of+contaminated+and+uncontaminated+sediments&rft.au=Harris%2C+Rose%3BReimus%2C+Paul+W%3BDing%2C+Mei%3BMusa%2C+Dea%3BLawver%2C+Angela%3BWoldeGabriel%2C+Giday%3BPerkins%2C+George%3BKatzman%2C+Danny%3BAnonymous&rft.aulast=Harris&rft.aufirst=Rose&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Actinide sorption in a dolomite rock system: evaluating the degree of conservatism in k (sub d) ranges used in performance assessment models AN - 1861109109; 787355-21 AB - The Waste Isolation Pilot Plant (WIPP) near Carlsbad, NM has been accepting transuranic (TRU) waste since 1999 and is the only operating nuclear waste repository in the US. The WIPP is located in a salt deposit approximately 650 m below the surface overlain by multiple layers of dolomite and other geologic material. Performance assessment (PA) modeling for a 10,000 year period is required to recertify the operating license with the US EPA every five years. Human intrusion caused by drilling operations is the main pathway of concern for environmental release of radioactive material. We are evaluating the degree of conservatism in the estimated sorption partition coefficients (Kds) based on a complementary batch and column method (Dittrich and Reimus, 2016, 2015; Dittrich et al., 2015). The main focus of this work is to investigate the role of ionic strength, solution chemistry, and oxidation state (III-VI) in actinide sorption to dolomite rock. Based on redox conditions and solution chemistry expected at the WIPP, possible actinide species include Pu(III), Pu(IV), U(IV), U(VI), Np(IV), Np(V), Am(III), and Th(IV). We will present (1) a conceptual overview of Kd use in the PA model, (2) background and evolution of the Kd ranges used, and (3) results from batch and column experiments and model predictions for Kds with WIPP geologic media. We will also briefly discuss the challenges of upscaling from lab experiments to field scale predictions, the presence of ligands (e.g., acetate, citrate, EDTA), the role of colloids and microbes, and the effect of engineered barrier materials (e.g., MgO) on sorption and transport conditions. References: Dittrich, T.M., Reimus, P.W. 2016. Reactive transport of uranium in fractured crystalline rock: Upscaling in time and distance. J Environ Manage 165, 124-132 Dittrich, T.M., Reimus, P.W. 2015. Uranium transport in a crushed granodiorite: experiments and reactive transport modeling. J Contam Hydrol 175-176: 44-59. Dittrich, T.M., Boukhalfa, H., Ware, S.D., Reimus, P.W. 2015. Laboratory investigation of the role of desorption kinetics on americium transport associated with bentonite colloids. J Environ Radioactiv 148: 170-182. JF - Abstracts with Programs - Geological Society of America AU - Dittrich, Timothy M AU - Dugas, Michael P AU - Reed, Donald T AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 131 EP - 8 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861109109?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Actinide+sorption+in+a+dolomite+rock+system%3A+evaluating+the+degree+of+conservatism+in+k+%28sub+d%29+ranges+used+in+performance+assessment+models&rft.au=Dittrich%2C+Timothy+M%3BDugas%2C+Michael+P%3BReed%2C+Donald+T%3BAnonymous&rft.aulast=Dittrich&rft.aufirst=Timothy&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Authigenic mineral growth and copper corrosion in hydrothermal bentonite experiments AN - 1861109052; 787355-18 AB - The United States' Department of Energy has initiated the Used Fuel Disposition campaign to evaluate various generic geological repositories for the permanent disposal of used nuclear fuel and wastes. The development and evaluation of engineered barrier system (EBS) design concepts and their potential interactions with the natural barrier or with other EBS interfaces are inherently important to the long-term (i.e., tens of thousands of years) safety and performance assessment of the safety case. In some designs, copper cladding can be added on to the steel canister. Japan and Sweden currently incorporate this canister design. The focus of this experimental work is to characterize interaction of bentonite with potential used-fuel waste container materials (i.e. copper). Experiments were performed up to 300 degrees C at 150 - 160 bars for five to six weeks. Bentonite was saturated with a 1,900 ppm K-Ca-Na-Cl-bearing water with Cu-foils. Copper rapidly degrades into chalcocite (CuS2) and minor covellite (CuS) in the presence of H2S. Chalcocite growth and corrosion pit depths were measured for four different experimental runs yielding corrosion rates between 8.8-116 mu m/yr depending on duration of experiment, brine composition, and clay type (bentonite vs. Opalinus Clay). Results of this research show that nuclear waste containers act as a substrate for mineral growth in response to corrosion and that Cu clad canisters are a possible engineered barrier system material. JF - Abstracts with Programs - Geological Society of America AU - Caporuscio, Florie A AU - Palaich, Sarah AU - Cheshire, Michael C AU - Jove-Colon, Carlos AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 131 EP - 5 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861109052?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Authigenic+mineral+growth+and+copper+corrosion+in+hydrothermal+bentonite+experiments&rft.au=Caporuscio%2C+Florie+A%3BPalaich%2C+Sarah%3BCheshire%2C+Michael+C%3BJove-Colon%2C+Carlos%3BAnonymous&rft.aulast=Caporuscio&rft.aufirst=Florie&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Use of GIS and geologic framework models to support site evaluation and site characterization for a deep borehole field test in crystalline rock AN - 1861108699; 787355-25 AB - Options for disposal of spent nuclear fuel and other high-level radioactive waste are being evaluated through research supported by the DOE Used Fuel Disposition Campaign. In addition to more traditional mined geologic repositories, disposal options include disposal of certain types of radioactive waste in deep boreholes within crystalline basement rock. Understanding of the geologic environment for waste disposal is being supported by development of a Regional Geology GIS Database. In addition to data on the distribution of potential host rocks, the database also incorporates data pertaining to potential siting guidelines and issues, including data for geologic hazards, natural resources and cultural features. A first step in the development of the deep borehole disposal concept is to drill a characterization borehole to a depth of 5 kilometers in suitable crystalline basement rock. In addition to testing the feasibility of drilling a stable and large-diameter borehole, geological, geophysical, hydrological, geochemical and geomechanical data will be collected from the borehole and will be used to assess the potential of using deep boreholes for long-term isolation of waste within a crystalline basement environment. In 2015, DOE initiated a request for proposals in order to obtain a site for a characterization borehole. Guidelines for a site include appropriate depth to basement, structural simplicity within the basement, low heat flow and low seismic activity. Proposals were evaluated with the support of the GIS database, which includes data for most of the specified guidelines. Once a site is selected, the GIS database capability will be combined with a Geologic Framework Model (GFM) to represent existing geologic and geophysical data and to document new data from the borehole test. Existing data would include information from existing nearby boreholes, geophysical surveys, and hydrologic and geologic studies that would aid in understanding the regional and local geologic setting. The GFM would provide a tool for data management and visualization of data obtained from the field test. Data incorporated into the GFM would include stratigraphy, lithologic variations within crystalline basement, fracture data, as well as other data obtained from well logging and scientific tests. JF - Abstracts with Programs - Geological Society of America AU - Perry, Frank AU - Kelley, Richard E AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 131 EP - 12 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861108699?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Sedimentology+of+Darwin+waypoint+from+Curiosity+observations&rft.au=Williams%2C+R+M+E%3BSumner%2C+D+Y%3BGupta%2C+S%3BGrotzinger%2C+J+P%3BRubin%2C+D%3BWiens%2C+R+C%3BEdgett%2C+K+S%3BRice%2C+M+S%3BEdgar%2C+L+A%3BLewis%2C+K+W%3BMinitti%2C+M+E%3BSchieber%2C+J%3BWilliford%2C+K+H%3BBlaney%2C+D+L%3BYingst%2C+R+A%3BMalin%2C+M+C%3BMangold%2C+N%3BCousin%2C+A%3BLasue%2C+J%3BAnderson%2C+R+B%3BSchroeder%2C+S%3BGasnault%2C+O%3BFisk%2C+M+R%3BAnonymous&rft.aulast=Williams&rft.aufirst=R+M&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Updates on salt repository experiments and simulations AN - 1861108288; 787355-20 AB - As part of the Department of Energy's (DOE) Environmental Management (EM) and Nuclear Energy (NE) research programs into nuclear waste repositories, Los Alamos National Laboratory (LANL) has been involved in both experiments and simulations that seek to increase our understanding of the complex coupled processes that occur when hot waste interacts with salt formations in the underground. Specific objectives related to disposal system performance are defined in an update to the UFD Campaign Implementation Plan (McMahon, 2012). For 2013-2016 the research has been focused on using theory, experiments, and modeling in combination with existing underground research laboratory (URL) data to assess disposal system performance, including reduction of uncertainty associated with heat-generating nuclear waste (HGNW). HGNW is defined herein as the combination of both heat generating defense high level waste (DHLW) and civilian spent nuclear fuel (SNF). Thermal, hydrological, mechanical, and chemical (THMC) coupling and related modeling, as well as development of a field testing plan are called out in this objective. In this presentation, we summarize recent advances in coupled heat and mass transfer in granular salt, including water/vapor migration, precipitation/dissolution, chemical reactions and in-situ subsurface evaporation. All of these processes are tied to the technical basis for disposal, spanning the operational, pre- and post-closure, and long term isolation of waste.aAdditionally, this work supports phased field thermal testing in salt planned for the underground at the Waste Isolation Pilot Plant (WIPP) that is expected to begin in early 2017. JF - Abstracts with Programs - Geological Society of America AU - Stauffer, Philip H AU - Weaver, Douglas AU - Boukalfa, Hakim AU - Otto, Shawn AU - Caporuscio, Florie A AU - Zyvoloski, George AU - Chu, Shaoping AU - Bourret, Michelle AU - Johnson, Peter AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 131 EP - 7 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861108288?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Mafic+to+felsic+igneous+rock+in+hummocky+plain+at+Gale+Crater%3B+a+ChemCam+campaign+%28Sol+13-45+and+Sol+326-359%29&rft.au=Sautter%2C+V%3BFabre%2C+C%3BForni%2C+Olivier%3BToplis%2C+M%3BCousin%2C+A%3BOllila%2C+A%3BMeslin%2C+P+Y%3BMangold%2C+N%3BWiens%2C+R+C%3BGasnault%2C+Olivier%3BMaurice%2C+S%3BLanza%2C+N+L%3BAnderson%2C+R+B%3BAnonymous&rft.aulast=Sautter&rft.aufirst=V&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - (super 239) pu- (super 238) u disequilibrium studies at the nopal i uranium ore deposit, pena blanca, Mexico AN - 1861108255; 787355-15 AB - Understanding environmental Pu mobility is necessary in order to evaluate the potential impacts on human health from a radioactive waste repository. Plutonium-239 (t1/2 = 24,100 a) is produced naturally in ore deposits by neutron capture from 238U. Deviations from the expected Pu/U ratio (nuclear equilibrium) suggest either Pu or U mobility in the past 5 239Pu half-lives, most likely through mineral-water interaction. In this study we present U and Pu concentrations and isotopic ratios for samples from the fractures surrounding the Nopal I natural uranium ore deposit at Pe+ or -a Blanca, Mexico. These results were obtained via a highly-sensitive isotope dilution thermal ionization mass spectrometry technique. Our results show much lower plutonium concentrations ( nearly equal 0.2-1.2 fg/g) compared to previously reported data from other locations. Previous U-series work on most of these Pe+ or -a Blanca samples yielded 238U-234U-230Th closed system ages >200 ka (Denton et al., 2016), and so the 238U-239Pu system should be in nuclear equilibrium. Hence, the measured 239Pu/238U ratios (1.9 + or - 1.3 x10-13 (2sigma )) suggest a nuclear equilibrium value for 239Pu/238U that is a factor of 40 lower than previously reported at other uranium ore deposits. One possible explanation for this is a lower neutron flux at this site resulting in less plutonium being produced. Our Pu/U results support previous work at Pena Blanca demonstrating uranium loss at one particular location in the unsaturated zone due to mineral-water interaction. These new results for the nuclear equilibrium value together with those of previous groundwater studies at Pena Blanca allow us to estimate that the retardation factor in the saturated zone for Pu is >10 times that of U, or > nearly equal 13,000 (Goldstein et al., 2010). Consequently we conclude that there is very little plutonium mobility due to mineral-water interaction in the fractured, rhyolitic tuff at Pe+ or -a Blanca. JF - Abstracts with Programs - Geological Society of America AU - Denton, Joanna S AU - Goldstein, Steven J AU - Nunn, Andrew J AU - Hinrichs, Kimberly A AU - Amato, Ronald S AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 131 EP - 2 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861108255?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Mg+profile+correction+in+Genesis+Si+collectors+using+rastered+ion+imaging&rft.au=Westphal%2C+A+J%3BOgliore%2C+R+C%3BHuss%2C+G+R%3BNakashima%2C+K%3BOlinger%2C+C%3BAnonymous&rft.aulast=Westphal&rft.aufirst=A&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - 3-D simulation of soil vapor extraction in a deep unsaturated zone AN - 1861108014; 787353-97 AB - Material Disposal Area L (MDA L) is an inactive liquid-waste disposal site operated from 1973 to 1985 located within the boundary of Los Alamos National Laboratory (LANL). A subsurface vapor plume of volatile organic compounds (VOCs) extends to depths of greater than 100 m in the vadose zone, and site remediation is recommended to reduce possible future impacts to groundwater. Soil vapor extraction (SVE) using two SVE wells was conducted at the site as an interim remediation measure. Over the past 18 months, we have monitored the changes in both the effluent and the subsurface plume over time. We see an overall reduction of concentrations with time in both the SVE effluent and many of the surrounding monitoring wells, changes in the molar concentration ratios of extracted gas, and a 60% decrease in total plume mass. SVE effluent concentration data for the most prevalent VOC contaminant found in the vapor plume (1,1,1 TCA) were compared to those predicted by a previously calibrated 3-D multiphase numerical model of the site. The west side effluent data and model curves matched well, but the east side curves require recalibration of the subsurface permeability. The newly calibrated simulations are then used to explore rebound data and constrain leakage rates from subsurface waste containers. JF - Abstracts with Programs - Geological Society of America AU - Snyder, Emily E AU - Marczak, Stanislaw AU - Salazar, Larry J AU - Fordham, Gerald F AU - Chu, Shaoping AU - Strobridge, Dan AU - Rich, Kent C AU - Stauffer, Philip H AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 120 EP - 2 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861108014?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=3-D+simulation+of+soil+vapor+extraction+in+a+deep+unsaturated+zone&rft.au=Snyder%2C+Emily+E%3BMarczak%2C+Stanislaw%3BSalazar%2C+Larry+J%3BFordham%2C+Gerald+F%3BChu%2C+Shaoping%3BStrobridge%2C+Dan%3BRich%2C+Kent+C%3BStauffer%2C+Philip+H%3BAnonymous&rft.aulast=Snyder&rft.aufirst=Emily&rft.date=2016-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Experimental study of fracture generation and permeability evolution during injection-induced precipitation in carbonate-rich shale AN - 1861101307; 787338-38 AB - Fracture mineralization is commonly observed in nature but has proven difficult to study in the laboratory. Here we present a model system involving reaction of a BaCl (sub 2) aqueous solution with a fine-grained carbonate rock that dissolves calcium carbonate and precipitates barium carbonate within a laboratory-produced fracture network. For the experiments, we use a triaxial direct-shear coreflood system with integrated x-ray tomography and radiography. The experiment was conducted at a confining stress of 3.5 MPa, 20 degrees C and using a 1x1 inch cylinder of an almost pure carbonate core sample from the Utica shale gas play. The specimen was loaded in direct shear to failure, which led to the formation of a through-going, permeable fracture system. We recorded the fracture process using x-ray radiography that showed the formation of a variable aperture fracture coincident with the onset of peak permeability of 0.43 mD. Over the course of a 90-minute injection of a dilute BaCl (sub 2) solution, barium carbonate precipitation was clearly evident in radiography and in subsequent tomography conducted at pressure. X-ray tomography showed that the fracture system was dominated by a primary fracture that connected the shear platens and that had a large but variable aperture. Back-scattered electron microscopy revealed that precipitation of barium carbonate occurred throughout the fracture system and from inlet to outlet. Precipitation was concentrated in small-aperture regions, areas of fracture gouge, and within an extensive network of very small, subsidiary fractures emanating off of the main fractures. Needles of barium carbonate were observed to grow perpendicular to the fracture walls. Despite the extensive precipitation, permeability dropped by only a factor of 3 during the experiment. This model system may be an analog for precipitation occurring in geothermal systems, reactions between injected fluids and formation waters in oil and gas, or as a method of manipulating permeability through reaction-induced in-filling of fractures in applications such as conformance in oil and gas production or caprock integrity in CO (sub 2) sequestration. JF - Abstracts with Programs - Geological Society of America AU - Carey, J William AU - Frash, Luke AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 4 EP - 4 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861101307?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Experimental+study+of+fracture+generation+and+permeability+evolution+during+injection-induced+precipitation+in+carbonate-rich+shale&rft.au=Carey%2C+J+William%3BFrash%2C+Luke%3BAnonymous&rft.aulast=Carey&rft.aufirst=J&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Stress-permeability effects through shear fractures formed in the subsurface AN - 1861101287; 787342-17 AB - The potential for permeability increase through stimulated fractures and faults in the subsurface has become a significant concern, especially as associated with induced seismicity. However, the effect of stresses on the permeability of freshly formed fractures is not yet well understood. In this study, we use X-ray imaging to directly observe fracture initiation and propagation through rock at stressed conditions and we couple this information with simultaneous permeability testing. Fractures were created using a triaxial direct-shear method through initially intact specimens of fine-grained Utica shale. X-ray computed tomography images of a specimen that was fractured at 22 MPa confining stress and observed at stressed conditions, indicate that significant shear deformation can be accommodated by distributed fracturing and communition of the rock, all without creating a hydraulically connected fracture aperture pathway or significantly enhanced permeability. However, in experiments at lower confining stress (3.5 MPa), significant permeability increases of 2 to 4 orders of magnitude were observed in which discrete hydraulically open fractures were created by shear and propped open by asperities. Results from our experiments show that even moderate-stress conditions can reduce or inhibit permeability enhancement of shear-stimulated fractures. These results highlight the challenges of stimulating permeability in hydraulic fracturing operations, while illustrating the potential resilience of caprock. JF - Abstracts with Programs - Geological Society of America AU - Frash, Luke AU - Carey, J William AU - Viswanathan, Hari AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 33 EP - 6 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861101287?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Stress-permeability+effects+through+shear+fractures+formed+in+the+subsurface&rft.au=Frash%2C+Luke%3BCarey%2C+J+William%3BViswanathan%2C+Hari%3BAnonymous&rft.aulast=Frash&rft.aufirst=Luke&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Increasing the production efficiency and reducing the water requirements for hydraulic fracturing AN - 1861100997; 787342-21 AB - Shale gas is an unconventional fossil energy resource profoundly impacting US energy independence and is projected to last for at least 100 years. Production of methane and other hydrocarbons from low permeability shale involves hydraulic fracturing of rock, establishing fracture connectivity, and multiphase fluid-flow and reaction processes all of which are poorly understood. The result is inefficient extraction with many environmental concerns. A science-based capability is required to quantify the governing mesoscale fluid-solid interactions, including microstructural control of fracture patterns and the interaction of engineered fluids with hydrocarbon flow. These interactions depend on coupled thermo-hydro-mechanical-chemical (THMC) processes over scales from microns to tens of meters. Determining the key mechanisms in subsurface THMC systems has been impeded due to the lack of sophisticated experimental methods to measure fracture aperture and connectivity, multiphase permeability, and chemical exchange capacities at the high temperature, pressure, and stresses present in the subsurface. In this study, we developed and prototyped the microfluidic and triaxial core flood experiments required to reveal the fundamental dynamics of fracture-fluid interactions. The goal is transformation of hydraulic fracturing from present ad hoc approaches to science-based strategies while safely enhancing production. Specifically, we have demonstrated an integrated experimental/modeling approach that allows for a comprehensive characterization of fluid-solid interactions and develop models that can be used to determine the reservoir operating conditions necessary to gain a degree of control over fracture generation, fluid flow, and interfacial processes over a range of subsurface conditions. JF - Abstracts with Programs - Geological Society of America AU - Viswanathan, Hari AU - Carey, J William AU - Rougier, Esteban AU - Porter, Mark AU - Karra, Satish AU - Kang, Qinjun AU - Hyman, Jeffrey AU - Martinez, Joaquin Jimenez AU - Lei, Zhou AU - Makedonska, Nataliia AU - Frash, Luke AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 33 EP - 10 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861100997?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Increasing+the+production+efficiency+and+reducing+the+water+requirements+for+hydraulic+fracturing&rft.au=Viswanathan%2C+Hari%3BCarey%2C+J+William%3BRougier%2C+Esteban%3BPorter%2C+Mark%3BKarra%2C+Satish%3BKang%2C+Qinjun%3BHyman%2C+Jeffrey%3BMartinez%2C+Joaquin+Jimenez%3BLei%2C+Zhou%3BMakedonska%2C+Nataliia%3BFrash%2C+Luke%3BAnonymous&rft.aulast=Viswanathan&rft.aufirst=Hari&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Assessing leakage potential of fractured caprocks through discrete fracture network modeling approach AN - 1861100957; 787338-40 AB - Understanding how fluids flow through networks of fractures and fractured porous media has multiple applications, including geologic CO (sub 2) storage, hydrocarbon extraction, geothermal energy production, nuclear waste disposal, etc. Safe, long-term storage of CO (sub 2) requires having a competent caprock above the primary storage reservoir. Evidence based on natural CO (sub 2) reservoirs as well as oil and gas reservoirs demonstrates effectiveness of caprocks. In spite of the evidence it is critical that effectiveness of caprock to limit migration of CO (sub 2) and brine at typical CO (sub 2) storage sites should be assessed, including potential of flow through naturally present fractures and fracture networks. Over the years various approaches have been developed to simulate and predict fluid flow through fractured rocks, including those where fractures are either represented explicitly or as part of multiple, interacting continua. The Discrete Fracture Network (DFN) modeling approach allows to explicitly characterize effect of geometry and properties of fractures (and fracture network) on fluid flow. At Los Alamos National Laboratory we have developed a novel approach to generate high quality, conforming Delaunay triangulation of 3-dimensional discrete fracture network. The approach allows for computationally efficient representation of complex fracture networks that can be used in multi-phase fluid flow simulations. Additionally, we are have also developed an approach that explicitly connects DFNs to volumes such that the process of CO (sub 2) injection into a storage reservoir and subsequent flow through an overlying caprock, which may be fractured, can be simulated. We are applying this approach to perform numerical simulations of multi-phase fluid flow through complex fracture networks in caprocks that overly CO (sub 2) storage reservoirs. Results of our study demonstrate that not all of the fractures in a fracture network contribute to the flow. Additionally, we also observe that CO (sub 2) flow through fractured caprock is affected by the nature of CO (sub 2) movement in the storage reservoir and which parts of fracture networks are intercepted by CO (sub 2) plume. These results have implications on not only assessing the effectiveness of caprocks but also on deploying technologies to effectively monitor leakage through caprocks. JF - Abstracts with Programs - Geological Society of America AU - Pawar, Rajesh J AU - Makedonska, Nataliia AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 4 EP - 6 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861100957?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Assessing+leakage+potential+of+fractured+caprocks+through+discrete+fracture+network+modeling+approach&rft.au=Pawar%2C+Rajesh+J%3BMakedonska%2C+Nataliia%3BAnonymous&rft.aulast=Pawar&rft.aufirst=Rajesh&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Quantifying the export of floodplain soil carbonato arctic rivers by Bank erosion AN - 1861100947; 787342-55 AB - Recent efforts to quantify terrestrial carbon budgets highlight the importance of inland waters in the transport, loss to the atmosphere, and storage of carbon. Many of the estimates of carbon loss and storage along river systems are largely based on differencing the estimated input to rivers in headwaters from the outflows at measured at river mouths. However, studies of sediment exchange between river and floodplains, on systems large and small, have reported that the total amount of sediment being moved between river and floodplains can exceed the amount being discharged at the river mouth on an annual basis. This back and forth of sediment also likely impacts the storage, release and fate of particulate carbon in systems with floodplains. Here we present the results of a study that seeks to quantify the flux of soil carbon from floodplains into rivers across the Arctic. Using satellite imagery and aerial photography collected over 4 decades, we quantified rates of lateral floodplain erosion on approximately 5,000 km of rivers in 12 Arctic watersheds. An empirical model for lateral erosion rates was developed using topographic, climatological and permafrost distribution datasets. This model was then used to extrapolate erosion rates from the measured other sections of rivers across the Arctic. This extrapolation was restricted to only rivers with detectable alluvial floodplains. We then coupled these pan-Arctic erosion estimates with recently published maps of soil carbon across permafrost regions to quantify the annualized flux of soil carbon from the upper few meters of floodplains into rivers. Preliminary results indicate that annually tens of Terragrams (Tg) of carbon enter arctic rivers from their bounding floodplains. The fate of this carbon is presently unknown. Much of the carbon may be redeposited downstream or respired to the atmosphere. However, based on limited data of particulate carbon fluxes measured at the mouths of arctic rivers, it appears that more carbon is cycled between rivers and their floodplains than is exported to the ocean. JF - Abstracts with Programs - Geological Society of America AU - Rowland, Joel C AU - Muss, Jordan AU - Shelef, Eitan AU - Stauffer, Sophie AU - Sutfin, Nicholas A AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 36 EP - 5 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861100947?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Quantifying+the+export+of+floodplain+soil+carbonato+arctic+rivers+by+Bank+erosion&rft.au=Rowland%2C+Joel+C%3BMuss%2C+Jordan%3BShelef%2C+Eitan%3BStauffer%2C+Sophie%3BSutfin%2C+Nicholas+A%3BAnonymous&rft.aulast=Rowland&rft.aufirst=Joel&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Linking annual flux of floodplain sediment and organic carbon with discharge along a meandering mountain river AN - 1861100822; 787342-53 AB - Linking floodplain response to variability in annual discharge provides insight into potential shifts in floodplain dynamics under increasing demand for freshwater and a changing climate. We use 13 historical aerial images spanning 45 years, a 0.5-m resolution aerial LIDAR dataset from 2015, field measurements of soil depth, soil samples, sediment aggradation tiles on the floodplain, and reconstructed hydrographs of the East River near Crested Butte, CO, USA to estimate net sediment and organic carbon (OC) flux in relation to discharge. Differences in river channel location are used to quantify bank erosion and lateral floodplain accretion rates within the period between 2 images. The area of deposition and vertical aggradation rate will be used to estimate the volume of accumulated sediment on the floodplain for each time interval. Net difference between volumes of eroded and deposited sediment will be used to estimate the flux of floodplain sediment within the period between aerial images. Preliminary results for the entire 13-km study reach indicate 22685 m2 of lateral accretion and 25318 m2 of erosion resulting in net erosion of 2633 m2 between the late summer of 2013 and 2015. Using an accretion rate of 1 cm yr-1, estimated from contemporary depths of fine sediment where gravel pointbars were present in 1990, and a mean measured depth of fine sediment of 57 cm along a subreach nearly equal 4 km long, we estimate that 455 m3of deposition and 14378 m3 of erosion resulted in a net efflux of 13923 m3 of sediment across the entire floodplain. Using a measured mean soil bulk density of nearly equal 0.86 g/cm3 and soil organic carbon content of 3.5% and assuming these values represent sediment both imported and exported to the floodplain, this equates to a net efflux of carbon of 419 Mg and 1.44 Mg C ha-1 y-1. Flows during 2014 and 2015 were relatively high compared to bankfull discharge with approximately 5- and 3-year recurrence intervals, respectively, but analysis was completed only point bars and did not account for vertical accretion across the entire floodplain. Furthermore, meander cutoffs and infilling of oxbow lakes, likely store a significant amount of organic carbon. JF - Abstracts with Programs - Geological Society of America AU - Sutfin, Nicholas A AU - Rowland, Joel C AU - Stauffer, Sophie J AU - Fratkin, Mulu AU - Williams, Kenneth H AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 36 EP - 3 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861100822?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Linking+annual+flux+of+floodplain+sediment+and+organic+carbon+with+discharge+along+a+meandering+mountain+river&rft.au=Sutfin%2C+Nicholas+A%3BRowland%2C+Joel+C%3BStauffer%2C+Sophie+J%3BFratkin%2C+Mulu%3BWilliams%2C+Kenneth+H%3BAnonymous&rft.aulast=Sutfin&rft.aufirst=Nicholas&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Recent observations by Curiosity's Mars Hand Lens Imager (MAHLI) of rock strata and eolian sediment on the lower North Slope of Aeolis Mons, Gale Crater, Mars AN - 1861096087; 777406-80 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Edgett, K S AU - Yingst, R A AU - Edgar, L A AU - Gasda, P J AU - Banham, S G AU - Grotzinger, J P AU - Newsom, H E AU - Bridges, N T AU - Watkins, J A AU - Herkenhoff, K E AU - Minitti, M E AU - Kennedy, M R AU - Krezoski, G M AU - Fey, D M AU - Belgacem, I AU - Gupta, S AU - Kah, L C AU - Lewis, K W AU - McBride, M J AU - Schieber, J AU - Stack, K M AU - Williams, R M E AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract 1382.pdf PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861096087?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Recent+observations+by+Curiosity%27s+Mars+Hand+Lens+Imager+%28MAHLI%29+of+rock+strata+and+eolian+sediment+on+the+lower+North+Slope+of+Aeolis+Mons%2C+Gale+Crater%2C+Mars&rft.au=Edgett%2C+K+S%3BYingst%2C+R+A%3BEdgar%2C+L+A%3BGasda%2C+P+J%3BBanham%2C+S+G%3BGrotzinger%2C+J+P%3BNewsom%2C+H+E%3BBridges%2C+N+T%3BWatkins%2C+J+A%3BHerkenhoff%2C+K+E%3BMinitti%2C+M+E%3BKennedy%2C+M+R%3BKrezoski%2C+G+M%3BFey%2C+D+M%3BBelgacem%2C+I%3BGupta%2C+S%3BKah%2C+L+C%3BLewis%2C+K+W%3BMcBride%2C+M+J%3BSchieber%2C+J%3BStack%2C+K+M%3BWilliams%2C+R+M+E%3BAnonymous&rft.aulast=Edgett&rft.aufirst=K&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 9 N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Outcrop-scale studies of a lacustrine-volcanic Mars analog with a Mars 2020-like instrument suite AN - 1861096038; 777408-75 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Martin, P E AU - Ehlmann, B L AU - Blaney, D L AU - Bhartia, R AU - Allwood, A C AU - Thomas, N H AU - Clegg, S M AU - Wiens, R C AU - Beegle, L W AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract 2569.pdf PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861096038?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Outcrop-scale+studies+of+a+lacustrine-volcanic+Mars+analog+with+a+Mars+2020-like+instrument+suite&rft.au=Martin%2C+P+E%3BEhlmann%2C+B+L%3BBlaney%2C+D+L%3BBhartia%2C+R%3BAllwood%2C+A+C%3BThomas%2C+N+H%3BClegg%2C+S+M%3BWiens%2C+R+C%3BBeegle%2C+L+W%3BAnonymous&rft.aulast=Martin&rft.aufirst=P&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 9 N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - New constraints on SW Mg isotopes from understanding Genesis DoS collectors, with implications AN - 1861093643; 777406-16 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Jurewicz, A J G AU - Rieck, K D AU - Wadhwa, M AU - Burnett, D S AU - Hervig, R AU - Williams, P AU - Guan, Y AU - Wiens, R AU - Huss, G R AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract 2350.pdf PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861093643?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=New+constraints+on+SW+Mg+isotopes+from+understanding+Genesis+DoS+collectors%2C+with+implications&rft.au=Jurewicz%2C+A+J+G%3BRieck%2C+K+D%3BWadhwa%2C+M%3BBurnett%2C+D+S%3BHervig%2C+R%3BWilliams%2C+P%3BGuan%2C+Y%3BWiens%2C+R%3BHuss%2C+G+R%3BAnonymous&rft.aulast=Jurewicz&rft.aufirst=A+J&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 5 N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Hydrogen fluence calculated from Genesis collectors AN - 1861093455; 777406-19 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Koeman-Shields, E C AU - Huss, G R AU - Ogliore, R C AU - Jurewicz, A J G AU - Burnett, D S AU - Nagashiima, K AU - Olinger, C T AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract 2800.pdf PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861093455?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Hydrogen+fluence+calculated+from+Genesis+collectors&rft.au=Koeman-Shields%2C+E+C%3BHuss%2C+G+R%3BOgliore%2C+R+C%3BJurewicz%2C+A+J+G%3BBurnett%2C+D+S%3BNagashiima%2C+K%3BOlinger%2C+C+T%3BAnonymous&rft.aulast=Koeman-Shields&rft.aufirst=E&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 7 N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Imaging at long distance with ChemCam remote micro-imager onboard MSL AN - 1861093432; 777406-81 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gasnault, O AU - Le Mouelic, S AU - Newsom, H E AU - Johnson, J R AU - Le Deit, L AU - Anderson, R B AU - Herkenhoff, K E AU - Wiens, R C AU - Bridges, N T AU - Pinet, P AU - Langevin, Y AU - Maurice, S AU - Calef, F J, III AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract 2329.pdf PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861093432?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Imaging+at+long+distance+with+ChemCam+remote+micro-imager+onboard+MSL&rft.au=Gasnault%2C+O%3BLe+Mouelic%2C+S%3BNewsom%2C+H+E%3BJohnson%2C+J+R%3BLe+Deit%2C+L%3BAnderson%2C+R+B%3BHerkenhoff%2C+K+E%3BWiens%2C+R+C%3BBridges%2C+N+T%3BPinet%2C+P%3BLangevin%2C+Y%3BMaurice%2C+S%3BCalef%2C+F+J%2C+III%3BAnonymous&rft.aulast=Gasnault&rft.aufirst=O&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 12 N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Ongoing and planned long distance remote micro imager observations of targets on Aeolis Mons identified from orbit AN - 1861093406; 777406-83 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Anderson, R B AU - Dundas, C M AU - Edgar, L A AU - Gasnault, O AU - Le Mouelic, S AU - Newsom, H AU - Bridges, N AU - Wiens, R C AU - Frydenvang, J AU - Vasavada, A AU - Day, M D AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract 1770.pdf PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861093406?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Ongoing+and+planned+long+distance+remote+micro+imager+observations+of+targets+on+Aeolis+Mons+identified+from+orbit&rft.au=Anderson%2C+R+B%3BDundas%2C+C+M%3BEdgar%2C+L+A%3BGasnault%2C+O%3BLe+Mouelic%2C+S%3BNewsom%2C+H%3BBridges%2C+N%3BWiens%2C+R+C%3BFrydenvang%2C+J%3BVasavada%2C+A%3BDay%2C+M+D%3BAnonymous&rft.aulast=Anderson&rft.aufirst=R&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 6 N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Unexpected behavior of radionuclides associated with natural organic matter in the environment AN - 1861091633; 782773-32 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Santschi, P H AU - Xu, C AU - Kaplan, D AU - Yeager, C AU - Zhang, S AU - Schwehr, K A AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 2732 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861091633?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Unexpected+behavior+of+radionuclides+associated+with+natural+organic+matter+in+the+environment&rft.au=Santschi%2C+P+H%3BXu%2C+C%3BKaplan%2C+D%3BYeager%2C+C%3BZhang%2C+S%3BSchwehr%2C+K+A%3BAnonymous&rft.aulast=Santschi&rft.aufirst=P&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=2732&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/2732.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2016 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Al-Mg choronology of chondrules in the RBT04143 CV3 chondrite AN - 1861091585; 782768-36 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Nakashima, D AU - Ishida, H AU - Tenner, T J AU - Kita, N T AU - Nakamura, T AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 2236 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861091585?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Al-Mg+choronology+of+chondrules+in+the+RBT04143+CV3+chondrite&rft.au=Nakashima%2C+D%3BIshida%2C+H%3BTenner%2C+T+J%3BKita%2C+N+T%3BNakamura%2C+T%3BAnonymous&rft.aulast=Nakashima&rft.aufirst=D&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=2236&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/2236.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2016 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Process-rich projections of permafrost integrates surface/subsurface thermal hydrology in a warming climate AN - 1855320189; 2017-002873 JF - International Conference on Permafrost - Book of Abstracts AU - Painter, Scott L AU - Coon, Ethan T AU - Atchley, Adam AU - Jan, Ahmad Y1 - 2016 PY - 2016 DA - 2016 SP - 682 PB - [publisher varies], [location varies] VL - 11 KW - United States KW - hydrology KW - permafrost KW - degradation KW - snow cover KW - Arctic region KW - global change KW - thawing KW - climate change KW - Barrow Alaska KW - temperature KW - snow KW - climate effects KW - Alaska KW - global warming KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855320189?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Conference+on+Permafrost+-+Book+of+Abstracts&rft.atitle=Process-rich+projections+of+permafrost+integrates+surface%2Fsubsurface+thermal+hydrology+in+a+warming+climate&rft.au=Painter%2C+Scott+L%3BCoon%2C+Ethan+T%3BAtchley%2C+Adam%3BJan%2C+Ahmad&rft.aulast=Painter&rft.aufirst=Scott&rft.date=2016-01-01&rft.volume=11&rft.issue=&rft.spage=682&rft.isbn=&rft.btitle=&rft.title=International+Conference+on+Permafrost+-+Book+of+Abstracts&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Eleventh international conference on Permafrost; exploring permafrost in a future Earth N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - Number of references - 4 N1 - Last updated - 2017-01-05 N1 - CODEN - #07985 N1 - SubjectsTermNotLitGenreText - Alaska; Arctic region; Barrow Alaska; climate change; climate effects; degradation; global change; global warming; hydrology; permafrost; snow; snow cover; temperature; thawing; United States ER - TY - JOUR T1 - The role of groundwater in highly human-modified hydrosystems: a review of impacts and mitigation options in the Campo de Cartagena-Mar Menor coastal plain (SE Spain) AN - 1850770965; PQ0003902372 AB - Hydrological processes and water resources are increasingly modified by anthropogenic actions, leading to multiple pressures on the environment and related ecosystems. A better understanding of the interactions between the anthroposphere and the hydrosphere is necessary to shape more sustainable societies. The pressure of human activities on the environment is especially high along the circum-Mediterranean area because of a combination of biophysical and economic factors. The Campo de Cartagena coastal plain, together with the Mar Menor lagoon, is one of the most exemplary areas in this aspect. This work analyzes this system at the basin level by providing a synthesis of the state of knowledge of each hydrological compartment and the links between them. We pay special attention to the important role that groundwater plays in the overall functioning of the system, both as a promoting and (or) mitigating agent. The principal identified impacts from human actions are water imbalance (28% of consumed water resources are not renewable); aquifer-cross contamination (high areal density, 1.2 wells/km super(2)); acid-mine drainage (mine wastes, accounting for 175 hm super(3) on land and 25 hm super(3) in the sea, accumulated mainly between 1957 and 1992); and lagoon eutrophication (NO sub(3) super(-) up to 1 mg/L). A set of mitigation options and complementary management measures that should be implemented following an integrative and holistic approach are presented and discussed, supporting a more sustainable regional economy and the recovery of critical ecosystem services.Original Abstract: Les processus hydrologiques et les ressources en eau sont de plus en plus modifies par les actions anthropiques, occasionnant de multiples pressions sur l'environnement et les ecosystemes connexes. Une meilleure comprehension des interactions entre l'anthroposphere et l'hydrosphere est necessaire afin de faconner des societes plus durables. La pression des activites humaines sur l'environnement est particulierement elevee le long de la zone circummediterraneenne en raison de la combinaison des facteurs biophysiques et economiques. La plaine cotiere Campo de Cartagena avec la lagune Mar Menor est une des zones les plus representatives a cet egard. Cette etude analyse ce systeme au niveau du basin en produisant une synthese de l'etat des connaissances de chaque milieu hydrologique et des liens entre eux. Nous pretons une attention particuliere au role important que joue l'eau souterraine dans le fonctionnement general du systeme, tant comme agent promoteur qu'attenuateur. Les principaux effets causes par les actions humaines sont : le desequilibre de l'eau (28% des ressources en eau consommees ne sont pas renouvelables), la contamination croisee aquifere (densite de surface elevee, 1.2 puits par km super(2)), le drainage minier acide (les residus miniers, representant 175 hm super(3) sur terre et 25 hm super(3) en mer, accumules principalement entre 1957 et 1992), et l'eutrophisation de la lagune (NO sub(3) super(-) jusqu'a 1 mg/L). On presente et analyse un ensemble d'options d'attenuation et de mesures de gestion complementaires qu'on devrait mettre en oeuvre en suivant une approche integrative et holistique, favorisant une economie regionale plus durable et le retablissement de services ecosystemiques critiques. [Traduit par la Redaction] JF - Environmental Reviews AU - Jimenez-Martinez, J AU - Garcia-Arostegui, J L AU - Hunink, JE AU - Contreras, S AU - Baudron, P AU - Candela, L AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA., jjimenez@lanl.gov Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 377 EP - 392 PB - NRC Research Press VL - 24 IS - 4 SN - 1181-8700, 1181-8700 KW - Environment Abstracts KW - water imbalance KW - aquifer-cross contamination KW - acid-mine drainage KW - eutrophication KW - desequilibre de l'eau KW - contamination croisee aquifere KW - drainage minier acide KW - eutrophisation KW - ANE, Spain KW - ASW, Colombia, Bolivar, Cartagena KW - Mitigation KW - Contamination KW - Ecosystems KW - MED, Spain, Murcia, Mar Menor KW - Drainage KW - Basins KW - Water resources KW - Mines KW - Hydrosphere KW - Lagoons KW - Economic factors KW - Economics KW - Human factors KW - Groundwater KW - ENA 12:Oceans & Estuaries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1850770965?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Reviews&rft.atitle=The+role+of+groundwater+in+highly+human-modified+hydrosystems%3A+a+review+of+impacts+and+mitigation+options+in+the+Campo+de+Cartagena-Mar+Menor+coastal+plain+%28SE+Spain%29&rft.au=Jimenez-Martinez%2C+J%3BGarcia-Arostegui%2C+J+L%3BHunink%2C+JE%3BContreras%2C+S%3BBaudron%2C+P%3BCandela%2C+L&rft.aulast=Jimenez-Martinez&rft.aufirst=J&rft.date=2016-01-01&rft.volume=24&rft.issue=4&rft.spage=377&rft.isbn=&rft.btitle=&rft.title=Environmental+Reviews&rft.issn=11818700&rft_id=info:doi/10.1139%2Fer-2015-0089 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Number of references - 150 N1 - Last updated - 2016-12-21 N1 - SubjectsTermNotLitGenreText - Mitigation; Ecosystems; Contamination; Drainage; Water resources; Basins; Mines; Lagoons; Hydrosphere; Economic factors; Economics; Human factors; Groundwater; ANE, Spain; ASW, Colombia, Bolivar, Cartagena; MED, Spain, Murcia, Mar Menor DO - http://dx.doi.org/10.1139/er-2015-0089 ER - TY - JOUR T1 - The magnesium isotopic composition of Cenozoic planktonic Foraminifera AN - 1849307795; 2016-110665 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Dial, Angela R AU - Misra, S AU - Salters, V J M AU - Landing, W M AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 663 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 KW - oceanic crust KW - magnesium KW - sea water KW - isotopes KW - Mg-26 KW - paleoclimatology KW - stable isotopes KW - climate change KW - Foraminifera KW - dolomite KW - Cenozoic KW - composition KW - Invertebrata KW - chemical ratios KW - alkaline earth metals KW - Protista KW - isotope ratios KW - planktonic taxa KW - weathering KW - Mg-26/Mg-24 KW - metals KW - carbonates KW - microfossils KW - crust KW - 12:Stratigraphy KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849307795?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=The+magnesium+isotopic+composition+of+Cenozoic+planktonic+Foraminifera&rft.au=Dial%2C+Angela+R%3BMisra%2C+S%3BSalters%2C+V+J+M%3BLanding%2C+W+M%3BAnonymous&rft.aulast=Dial&rft.aufirst=Angela&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=663&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/663.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2016 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 3 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; carbonates; Cenozoic; chemical ratios; climate change; composition; crust; dolomite; Foraminifera; Invertebrata; isotope ratios; isotopes; magnesium; metals; Mg-26; Mg-26/Mg-24; microfossils; oceanic crust; paleoclimatology; planktonic taxa; Protista; sea water; stable isotopes; weathering ER - TY - JOUR T1 - Palaeomagnetism in fold and thrust belts; use with caution AN - 1840615093; 2016-094080 AB - The application of palaeomagnetism in fold and thrust belts is a unique way to obtain kinematic information regarding the evolution of these systems. However, since many potential problems can affect the reliability of palaeomagnetic datasets and their interpretations, such data should be used with caution. In this paper, we thoroughly review the sources of error from palaeomagnetism with a particular focus on deciphering vertical-axis rotations and the assumptions behind the method. Recent investigations have demonstrated that the age of the magnetization and syn-folding results from the fold test must also be carefully examined: factors such as internal deformation, deficient isolation of components (i.e. overlapping) or incorrect restoration procedures may produce apparent syn-folding results. In fact, the restoration procedure used to return the palaeomagnetic signal to the palaeogeographic coordinate system may itself inhibit accurate estimations of vertical-axis rotations when complex deformation histories induce different, non-coaxial, deformation axes. We recommend the auxiliary use of the inclination v. dip diagram as an efficient tool for identifying many errors. Finally, to determine accurate vertical axis rotations, the reference direction should honour standard reliability criteria and would ideally be measured within the undeformed foreland of the thrust system. In this paper, we review five decades of palaeomagnetic research in fold and thrust belts by concentrating on maximizing standard reliability criteria procedures to reduce uncertainty and increase confidence when applying palaeomagnetic data to unravel the tectonic evolution of fold and thrust belts. JF - Special Publication - Geological Society of London AU - Pueyo, E L AU - Sussman, A J AU - Oliva-Urcia, B AU - Cifelli, Francesca Y1 - 2016 PY - 2016 DA - 2016 SP - 259 EP - 276 PB - Geological Society of London, London VL - 425 SN - 0305-8719, 0305-8719 KW - remagnetization KW - precision KW - pole positions KW - reliability KW - data KW - paleomagnetism KW - orogenic belts KW - signals KW - bedding KW - kinematics KW - planar bedding structures KW - plate tectonics KW - errors KW - rotation KW - tectonics KW - fold and thrust belts KW - corrections KW - sedimentary structures KW - accuracy KW - 18:Solid-earth geophysics KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840615093?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+Geological+Society+of+London&rft.atitle=Palaeomagnetism+in+fold+and+thrust+belts%3B+use+with+caution&rft.au=Pueyo%2C+E+L%3BSussman%2C+A+J%3BOliva-Urcia%2C+B%3BCifelli%2C+Francesca&rft.aulast=Pueyo&rft.aufirst=E&rft.date=2016-01-01&rft.volume=425&rft.issue=&rft.spage=259&rft.isbn=&rft.btitle=&rft.title=Special+Publication+-+Geological+Society+of+London&rft.issn=03058719&rft_id=info:doi/10.1144%2FSP425.14 L2 - http://sp.lyellcollection.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 210 N1 - Document feature - illus. N1 - Last updated - 2016-11-17 N1 - CODEN - GSLSBW N1 - SubjectsTermNotLitGenreText - accuracy; bedding; corrections; data; errors; fold and thrust belts; kinematics; orogenic belts; paleomagnetism; planar bedding structures; plate tectonics; pole positions; precision; reliability; remagnetization; rotation; sedimentary structures; signals; tectonics DO - http://dx.doi.org/10.1144/SP425.14 ER - TY - JOUR T1 - Remote raman detection of feldspars under daylight condition using a compact remote raman+LIBS+fluorescence system AN - 1832658568; 777378-42 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Misra, A K AU - Sharma, S K AU - Berlanga, G AU - Acosta-Maeda, T E AU - Clegg, S M AU - Wiens, R C AU - Abedin, M N AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no 1408 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832658568?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Remote+raman+detection+of+feldspars+under+daylight+condition+using+a+compact+remote+raman%2BLIBS%2Bfluorescence+system&rft.au=Misra%2C+A+K%3BSharma%2C+S+K%3BBerlanga%2C+G%3BAcosta-Maeda%2C+T+E%3BClegg%2C+S+M%3BWiens%2C+R+C%3BAbedin%2C+M+N%3BAnonymous&rft.aulast=Misra&rft.aufirst=A&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Diurnal variation of near-surface atmospheric water vapor at Gale Crater; analysis form REMS and CHEMCAM measurements AN - 1832657868; 777377-119 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Martinez, G M AU - McConnochie, T AU - Renno, N O AU - Meslin, P-Y AU - Fischer, E AU - Vicente-Retortillo, A AU - Borlina, C S AU - Kemppinen, O AU - Genzer, M AU - Gasnault, O AU - Gomez-Elvira, J AU - Wiens, R AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no 1761 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832657868?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Diurnal+variation+of+near-surface+atmospheric+water+vapor+at+Gale+Crater%3B+analysis+form+REMS+and+CHEMCAM+measurements&rft.au=Martinez%2C+G+M%3BMcConnochie%2C+T%3BRenno%2C+N+O%3BMeslin%2C+P-Y%3BFischer%2C+E%3BVicente-Retortillo%2C+A%3BBorlina%2C+C+S%3BKemppinen%2C+O%3BGenzer%2C+M%3BGasnault%2C+O%3BGomez-Elvira%2C+J%3BWiens%2C+R%3BAnonymous&rft.aulast=Martinez&rft.aufirst=G&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Libs - raman research facility at Los Alamos national Laboratory AN - 1832651069; 777372-22 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Clegg, S M AU - Wiens, R C AU - Delapp, D M AU - McInroy, R E AU - Maurice, S AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no2985 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832651069?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Libs+-+raman+research+facility+at+Los+Alamos+national+Laboratory&rft.au=Clegg%2C+S+M%3BWiens%2C+R+C%3BDelapp%2C+D+M%3BMcInroy%2C+R+E%3BMaurice%2C+S%3BAnonymous&rft.aulast=Clegg&rft.aufirst=S&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - The stability of spectralon, a potential calibration reference for Mars 2020 AN - 1832649878; 777379-7 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Mann, P AU - Cloutis, E A AU - Bell, J F, III AU - Wiens, R C AU - Johnson, J R AU - Durell, C AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstractno 2362 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832649878?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=The+stability+of+spectralon%2C+a+potential+calibration+reference+for+Mars+2020&rft.au=Mann%2C+P%3BCloutis%2C+E+A%3BBell%2C+J+F%2C+III%3BWiens%2C+R+C%3BJohnson%2C+J+R%3BDurell%2C+C%3BAnonymous&rft.aulast=Mann&rft.aufirst=P&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Chemcam investigation of the Pahrump Hills drill sites AN - 1832647552; 776759-61 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Jackson, R S AU - Wiens, R C AU - Vaniman, D T AU - Beegle, L W AU - Nachon, M AU - Forni, O AU - Blaney, D AU - Newsom, H E AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no1767 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832647552?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Chemcam+investigation+of+the+Pahrump+Hills+drill+sites&rft.au=Jackson%2C+R+S%3BWiens%2C+R+C%3BVaniman%2C+D+T%3BBeegle%2C+L+W%3BNachon%2C+M%3BForni%2C+O%3BBlaney%2C+D%3BNewsom%2C+H+E%3BAnonymous&rft.aulast=Jackson&rft.aufirst=R&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Igneous differentiation on Mars; trachybasalts in Gale Crater AN - 1832646140; 777379-57 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Bridges, J C AU - Edwards, P H AU - Anderson, R AU - Dyar, M D AU - Fisk, M AU - Thompson, L AU - Gasda, P AU - Schwenzer, S P AU - Goetz, W AU - Blaney, D AU - Filiberto, J AU - Wiens, R C AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstractno 2160 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832646140?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Igneous+differentiation+on+Mars%3B+trachybasalts+in+Gale+Crater&rft.au=Bridges%2C+J+C%3BEdwards%2C+P+H%3BAnderson%2C+R%3BDyar%2C+M+D%3BFisk%2C+M%3BThompson%2C+L%3BGasda%2C+P%3BSchwenzer%2C+S+P%3BGoetz%2C+W%3BBlaney%2C+D%3BFiliberto%2C+J%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Bridges&rft.aufirst=J&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Integrated geochemical and mineralogical analysis by remote libs, raman and time resolved fluorescence spectroscopy AN - 1832645475; 777378-40 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Clegg, S M AU - Wiens, R C AU - Newell, R AU - Maurice, S AU - Gasnault, O AU - Sharma, S K AU - Misra, A K AU - Anderson, R B AU - Forni, O AU - Lasue, J AU - Nowak-Lovato, K L AU - Angel, S M AU - Rull, F AU - Johnson, J R AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no 2037 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832645475?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Integrated+geochemical+and+mineralogical+analysis+by+remote+libs%2C+raman+and+time+resolved+fluorescence+spectroscopy&rft.au=Clegg%2C+S+M%3BWiens%2C+R+C%3BNewell%2C+R%3BMaurice%2C+S%3BGasnault%2C+O%3BSharma%2C+S+K%3BMisra%2C+A+K%3BAnderson%2C+R+B%3BForni%2C+O%3BLasue%2C+J%3BNowak-Lovato%2C+K+L%3BAngel%2C+S+M%3BRull%2C+F%3BJohnson%2C+J+R%3BAnonymous&rft.aulast=Clegg&rft.aufirst=S&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - A phenomenological theory of the reflectance of particulate media; scattering regimes and Lorentz band features AN - 1832643391; 777378-25 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Jeffery, C A AU - Henderson, B AU - Kulp, T AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no 2710 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832643391?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=A+phenomenological+theory+of+the+reflectance+of+particulate+media%3B+scattering+regimes+and+Lorentz+band+features&rft.au=Jeffery%2C+C+A%3BHenderson%2C+B%3BKulp%2C+T%3BAnonymous&rft.aulast=Jeffery&rft.aufirst=C&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Remote raman detection of natural rocks AN - 1832643339; 777378-44 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Berlanga, Genesis AU - Misra, A K AU - Acosta-Maeda, T AU - Sharma, S K AU - Clegg, S M AU - Wiens, R C AU - Abedin, M N AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no 2895 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832643339?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Remote+raman+detection+of+natural+rocks&rft.au=Berlanga%2C+Genesis%3BMisra%2C+A+K%3BAcosta-Maeda%2C+T%3BSharma%2C+S+K%3BClegg%2C+S+M%3BWiens%2C+R+C%3BAbedin%2C+M+N%3BAnonymous&rft.aulast=Berlanga&rft.aufirst=Genesis&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Effect of silicon on activity coefficients of siderophile elements (P, Au, Pd, As, Ge, Sb, and In) in liquid Fe, with application to core formation AN - 1832642892; 776759-76 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Righter, K AU - Pando, K AU - Danielson, L R AU - Humayun, M AU - Righter, M AU - Lapen, T AU - Boujiibar, A AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no2116 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832642892?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Effect+of+silicon+on+activity+coefficients+of+siderophile+elements+%28P%2C+Au%2C+Pd%2C+As%2C+Ge%2C+Sb%2C+and+In%29+in+liquid+Fe%2C+with+application+to+core+formation&rft.au=Righter%2C+K%3BPando%2C+K%3BDanielson%2C+L+R%3BHumayun%2C+M%3BRighter%2C+M%3BLapen%2C+T%3BBoujiibar%2C+A%3BAnonymous&rft.aulast=Righter&rft.aufirst=K&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Instrumental biases for SIMS magnesium isotope analyses AN - 1832634465; 782761-38 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Kita, N T AU - Ushikubo, T AU - Tenner, T J AU - Romaniello, S J AU - Wadhwa, M AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 1538 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832634465?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Instrumental+biases+for+SIMS+magnesium+isotope+analyses&rft.au=Kita%2C+N+T%3BUshikubo%2C+T%3BTenner%2C+T+J%3BRomaniello%2C+S+J%3BWadhwa%2C+M%3BAnonymous&rft.aulast=Kita&rft.aufirst=N&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=1538&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/1538.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2016 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Dynamic geochemical conditiions recorded by lakebed mudstones in Gale Crater, Mars AN - 1832621841; 776758-61 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Hurowitz, J A AU - Grotzinger, J AU - Fischer, W AU - Milliken, R AU - Dehouck, E AU - Fairen, A AU - Frydenvang, J AU - Gupta, S AU - McLennan, S AU - Siebach, K AU - Stack-Morgan, K AU - Sumner, D AU - Wiens, R AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no1751 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832621841?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Dynamic+geochemical+conditiions+recorded+by+lakebed+mudstones+in+Gale+Crater%2C+Mars&rft.au=Hurowitz%2C+J+A%3BGrotzinger%2C+J%3BFischer%2C+W%3BMilliken%2C+R%3BDehouck%2C+E%3BFairen%2C+A%3BFrydenvang%2C+J%3BGupta%2C+S%3BMcLennan%2C+S%3BSiebach%2C+K%3BStack-Morgan%2C+K%3BSumner%2C+D%3BWiens%2C+R%3BAnonymous&rft.aulast=Hurowitz&rft.aufirst=J&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Internal homogeneity of oxygen isotope ratios in chondrules AN - 1832621075; 776758-52 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Kita, N T AU - Tenner, T J AU - Ushikubo, T AU - Nakashima, D AU - Rudraswami, N G AU - Weisberg, M K AU - Defouilloy, C AU - Kimura, M AU - Nagahara, H AU - bischoff, A AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no2375 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832621075?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Internal+homogeneity+of+oxygen+isotope+ratios+in+chondrules&rft.au=Kita%2C+N+T%3BTenner%2C+T+J%3BUshikubo%2C+T%3BNakashima%2C+D%3BRudraswami%2C+N+G%3BWeisberg%2C+M+K%3BDefouilloy%2C+C%3BKimura%2C+M%3BNagahara%2C+H%3Bbischoff%2C+A%3BAnonymous&rft.aulast=Kita&rft.aufirst=N&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Modeling of sulfide microenvironments on Mars AN - 1832609344; 776758-55 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Schwenzer, S P AU - Bridges, J C AU - McAdam, A AU - Steer, E D AU - Conrad, P G AU - Kelley, S P AU - Wiens, R C AU - Mangold, N AU - Grotzinger, J AU - Eigenbrode, J L AU - Franz, H B AU - Sutter, B AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no1886 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832609344?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Modeling+of+sulfide+microenvironments+on+Mars&rft.au=Schwenzer%2C+S+P%3BBridges%2C+J+C%3BMcAdam%2C+A%3BSteer%2C+E+D%3BConrad%2C+P+G%3BKelley%2C+S+P%3BWiens%2C+R+C%3BMangold%2C+N%3BGrotzinger%2C+J%3BEigenbrode%2C+J+L%3BFranz%2C+H+B%3BSutter%2C+B%3BAnonymous&rft.aulast=Schwenzer&rft.aufirst=S&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Carbon detection with Chemcam; labortory studies and Mars results AN - 1832606774; 777378-95 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Beck, P AU - Forni, O AU - Lasue, J AU - Lewin, E AU - Cousin, A AU - Maurice, S AU - Meslin, P-Y AU - Rapin, W AU - Gasnault, O AU - Wiens, R C AU - Mangold, N AU - Sautter, V AU - Coll, P AU - Szopa, C AU - Dequaire, T AU - Blank, J G AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no 1826 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832606774?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Carbon+detection+with+Chemcam%3B+labortory+studies+and+Mars+results&rft.au=Beck%2C+P%3BForni%2C+O%3BLasue%2C+J%3BLewin%2C+E%3BCousin%2C+A%3BMaurice%2C+S%3BMeslin%2C+P-Y%3BRapin%2C+W%3BGasnault%2C+O%3BWiens%2C+R+C%3BMangold%2C+N%3BSautter%2C+V%3BColl%2C+P%3BSzopa%2C+C%3BDequaire%2C+T%3BBlank%2C+J+G%3BAnonymous&rft.aulast=Beck&rft.aufirst=P&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Correlated nucleaosynthetic anomalies in Mo, Ru and Pd from iron meteorites AN - 1832605732; 777373-40 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Mayer, B AU - Bermingham, K R AU - Worsham, E A AU - Humayun, M AU - Walker, R J AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no2055 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832605732?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Correlated+nucleaosynthetic+anomalies+in+Mo%2C+Ru+and+Pd+from+iron+meteorites&rft.au=Mayer%2C+B%3BBermingham%2C+K+R%3BWorsham%2C+E+A%3BHumayun%2C+M%3BWalker%2C+R+J%3BAnonymous&rft.aulast=Mayer&rft.aufirst=B&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Chemcam passive reflectance spectroscopy of recent drill tailings, hematite-bearing rocks, and dune sands AN - 1832605703; 777372-17 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Johnson, J R AU - Cloutis, E AU - Fraeman, A A AU - Ehlmann, B L AU - Wiens, R C AU - Maurice, S AU - Blaney, D AU - Gasnault, O AU - Le Mouelic, S AU - Pinet, P AU - Bender, S AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no1155 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832605703?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Chemcam+passive+reflectance+spectroscopy+of+recent+drill+tailings%2C+hematite-bearing+rocks%2C+and+dune+sands&rft.au=Johnson%2C+J+R%3BCloutis%2C+E%3BFraeman%2C+A+A%3BEhlmann%2C+B+L%3BWiens%2C+R+C%3BMaurice%2C+S%3BBlaney%2C+D%3BGasnault%2C+O%3BLe+Mouelic%2C+S%3BPinet%2C+P%3BBender%2C+S%3BAnonymous&rft.aulast=Johnson&rft.aufirst=J&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Signs of transport of chemical elements and soil-forming processes in surface soils at Gale Crater, Mars AN - 1832605008; 777371-16 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Hausrath, Elisabeth M AU - Goetz, W AU - Cousin, A AU - Wiens, R C AU - Messlin, P Y AU - Rapin, W AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no. 2493 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 KW - eolian features KW - enrichment KW - Mars KW - iron KW - Gale Crater KW - transport KW - sediments KW - interpretation KW - soils KW - ChemCam instrument KW - chemical weathering KW - chemical elements KW - pedogenesis KW - soil profiles KW - clastic sediments KW - desert pavement KW - weathering KW - depth KW - terrestrial planets KW - planets KW - metals KW - fine-grained materials KW - dust KW - Mars Science Laboratory KW - terrestrial comparison KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832605008?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Signs+of+transport+of+chemical+elements+and+soil-forming+processes+in+surface+soils+at+Gale+Crater%2C+Mars&rft.au=Hausrath%2C+Elisabeth+M%3BGoetz%2C+W%3BCousin%2C+A%3BWiens%2C+R+C%3BMesslin%2C+P+Y%3BRapin%2C+W%3BAnonymous&rft.aulast=Hausrath&rft.aufirst=Elisabeth&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2016/pdf/2493.pdf LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 16 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - ChemCam instrument; chemical elements; chemical weathering; clastic sediments; depth; desert pavement; dust; enrichment; eolian features; fine-grained materials; Gale Crater; interpretation; iron; Mars; Mars Science Laboratory; metals; pedogenesis; planets; sediments; soil profiles; soils; terrestrial comparison; terrestrial planets; transport; weathering ER - TY - JOUR T1 - Aegis intelligent targeting deployed for the curiosity rover's chemcam instrument AN - 1832603348; 777379-8 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Francis, Raymond AU - Estlin, T AU - Gaines, D AU - Doran, G AU - Gasnault, O AU - Johnstone, S AU - Montano, S AU - Mousset, V AU - Verma, V AU - Bornstein, B AU - Burl, M AU - Schaffer, S AU - Wiens, R C AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstractno 2487 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832603348?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Aegis+intelligent+targeting+deployed+for+the+curiosity+rover%27s+chemcam+instrument&rft.au=Francis%2C+Raymond%3BEstlin%2C+T%3BGaines%2C+D%3BDoran%2C+G%3BGasnault%2C+O%3BJohnstone%2C+S%3BMontano%2C+S%3BMousset%2C+V%3BVerma%2C+V%3BBornstein%2C+B%3BBurl%2C+M%3BSchaffer%2C+S%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Francis&rft.aufirst=Raymond&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Emission lines selected for the identification of chlorides, carbonates, and sulfates dispersed in basaltic rock using laser-induced breakdown spectroscopy (libs) AN - 1832603338; 777378-93 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Anderson, D E AU - Ehlmann, B L AU - Forni, O AU - Clegg, S M AU - Cousin, A AU - Thomas, N H AU - Lasue, J AU - Delapp, D M AU - McInroy, R E AU - Gasnault, O AU - Dyar, M D AU - Maurice, S AU - Wiens, R C AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no 2325 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832603338?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Emission+lines+selected+for+the+identification+of+chlorides%2C+carbonates%2C+and+sulfates+dispersed+in+basaltic+rock+using+laser-induced+breakdown+spectroscopy+%28libs%29&rft.au=Anderson%2C+D+E%3BEhlmann%2C+B+L%3BForni%2C+O%3BClegg%2C+S+M%3BCousin%2C+A%3BThomas%2C+N+H%3BLasue%2C+J%3BDelapp%2C+D+M%3BMcInroy%2C+R+E%3BGasnault%2C+O%3BDyar%2C+M+D%3BMaurice%2C+S%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Anderson&rft.aufirst=D&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Oxygen isotopic variations in modern Cetacean teeth and bones; implications for ecological, paleoecological, and paleoclimatic studies AN - 1832603074; 772382-14 AB - The oxygen isotope ratios (delta (super 18) O) preserved in marine sediments have been widely used to reconstruct past ocean temperatures. However, there remain significant uncertainties associated with this method, owing to assumptions about the delta (super 18) O of ancient seawater which affects the temperature inferred from sediment delta (super 18) O records. In this study, oxygen isotope compositions of phosphate in teeth and bones from five different modern cetacean species, including sperm whale, pygmy sperm whale, short-finned pilot whale, killer whale, and Cuvier's beaked whale, and three fossil whales were determined. The data were used to assess whether the oxygen isotope ratios of biogenic phosphate (delta (super 18) O (sub p) ) from cetaceans are a reliable proxy for the oxygen isotopic composition of ocean water (delta (super 18) O (sub w) ). The delta (super 18) O (sub p) values of modern cetaceans range from 15.5 ppm to 21.3 ppm, averaging (19.6 ppm+ or - 0.8 ppm) (n = 136). Using a greatly expanded global cetacean delta (super 18) O (sub p) dataset, the following regression equation is derived for cetaceans: delta (super 18) O (sub w) = 0.95317 (+ or -0.03293) delta (super 18) O (sub p) - 17.971 (+ or -0.605), r = 0.97253. The new equation, when applied to fossil teeth and bones, yielded reasonable estimates of ancient seawater delta (super 18) O (sub w) values. Intra-tooth isotopic variations were observed within individual teeth. Among the selected species, the killer whale (O. orca) has the lowest delta (super 18) O (sub p) values and the largest intra-tooth delta (super 18) O (sub p) variation, reflecting its habitat preference and migratory behavior. The results show that oxygen isotope analysis of phosphate in cetacean teeth and dense ear bones provides a useful tool for reconstructing the oxygen isotopic composition of seawater and for examining environmental preferences (including migratory behavior) of both modern and ancient whales. Copyright 2015 Science China Press and Springer-Verlag Berlin Heidelberg JF - Science Bulletin AU - Ciner, Burcu AU - Wang, Yang AU - Parker, William AU - Anonymous Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 92 EP - 104 PB - Springer for Science China Press, Beijing VL - 61 IS - 1 SN - 2095-9273, 2095-9273 KW - United States KW - Chesapeake Bay KW - oxygen KW - isotopes KW - paleoclimatology KW - stable isotopes KW - variations KW - paleoecology KW - Cenozoic KW - Theria KW - sampling KW - ecology KW - Eutheria KW - geochemistry KW - Chordata KW - isotope ratios KW - Mammalia KW - O-18/O-16 KW - teeth KW - Miocene KW - Tertiary KW - Neogene KW - Vertebrata KW - Cetacea KW - Tetrapoda KW - 12:Stratigraphy KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832603074?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+Bulletin&rft.atitle=Oxygen+isotopic+variations+in+modern+Cetacean+teeth+and+bones%3B+implications+for+ecological%2C+paleoecological%2C+and+paleoclimatic+studies&rft.au=Ciner%2C+Burcu%3BWang%2C+Yang%3BParker%2C+William%3BAnonymous&rft.aulast=Ciner&rft.aufirst=Burcu&rft.date=2016-01-01&rft.volume=61&rft.issue=1&rft.spage=92&rft.isbn=&rft.btitle=&rft.title=Science+Bulletin&rft.issn=20959273&rft_id=info:doi/10.1007%2Fs11434-015-0921-x L2 - http://link.springer.com/journal/volumesAndIssues/11434 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - SuppNotes - The online version of this article (doi:10.1007/s11434-015-0921-x) contains supplementary material, which is available to authorized users. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - Cenozoic; Cetacea; Chesapeake Bay; Chordata; ecology; Eutheria; geochemistry; isotope ratios; isotopes; Mammalia; Miocene; Neogene; O-18/O-16; oxygen; paleoclimatology; paleoecology; sampling; stable isotopes; teeth; Tertiary; Tetrapoda; Theria; United States; variations; Vertebrata DO - http://dx.doi.org/10.1007/s11434-015-0921-x ER - TY - JOUR T1 - Identificaiton of fresh feldspars in gale crater using chemcam AN - 1832600877; 777372-18 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gasda, P J AU - DeLapp, D M AU - Mcinroy, R E AU - Wiens, R C AU - Bridges, J C AU - Edwards, P H AU - Carlson, E AU - Sautter, V AU - Cousin, A AU - Maurice, S AU - Gasnault, O AU - Clegg, S AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no1604 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832600877?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Identificaiton+of+fresh+feldspars+in+gale+crater+using+chemcam&rft.au=Gasda%2C+P+J%3BDeLapp%2C+D+M%3BMcinroy%2C+R+E%3BWiens%2C+R+C%3BBridges%2C+J+C%3BEdwards%2C+P+H%3BCarlson%2C+E%3BSautter%2C+V%3BCousin%2C+A%3BMaurice%2C+S%3BGasnault%2C+O%3BClegg%2C+S%3BAnonymous&rft.aulast=Gasda&rft.aufirst=P&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Impact hazard mitigation research at Los Alamos National Laboratory; current status AN - 1832600466; 777379-45 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Plesko, C S AU - Ferguson, J M AU - Gisler, G R AU - Weaver, R P AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstractno 2764 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832600466?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Impact+hazard+mitigation+research+at+Los+Alamos+National+Laboratory%3B+current+status&rft.au=Plesko%2C+C+S%3BFerguson%2C+J+M%3BGisler%2C+G+R%3BWeaver%2C+R+P%3BAnonymous&rft.aulast=Plesko&rft.aufirst=C&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Apatite/melt partitioning experiments reveal redox sensitivity to CR, V, MN, NI, EU, W, TH, U AN - 1832600374; 777374-67 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Righter, U Kevin AU - Yang, S AU - Humayun, M AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no2168 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832600374?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Apatite%2Fmelt+partitioning+experiments+reveal+redox+sensitivity+to+CR%2C+V%2C+MN%2C+NI%2C+EU%2C+W%2C+TH%2C+U&rft.au=Righter%2C+U+Kevin%3BYang%2C+S%3BHumayun%2C+M%3BAnonymous&rft.aulast=Righter&rft.aufirst=U&rft.date=2016-01-01&rft.volume=47&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 47th lunar and planetary science confernece N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Impact from groundwater flow on ground temperature dynamics; observations and numerical simulations for a sporadic permafrost peatland environment AN - 1828849972; 2016-086921 JF - International Conference on Permafrost - Book of Abstracts AU - Sjoberg, Ylva AU - Coon, Ethan AU - Sannel, Britta AU - Pannetier, Romain AU - Harp, Dylan R AU - Frampton, Andrew AU - Painter, Scott L AU - Lyon, Steve Y1 - 2016 PY - 2016 DA - 2016 SP - 700 PB - [publisher varies], [location varies] VL - 11 KW - hydrology KW - peatlands KW - permafrost KW - Western Europe KW - numerical models KW - Europe KW - freezing KW - climate change KW - temperature KW - ground water KW - Scandinavia KW - mires KW - climate effects KW - hydrodynamics KW - seasonal variations KW - Sweden KW - northern Sweden KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828849972?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Conference+on+Permafrost+-+Book+of+Abstracts&rft.atitle=Impact+from+groundwater+flow+on+ground+temperature+dynamics%3B+observations+and+numerical+simulations+for+a+sporadic+permafrost+peatland+environment&rft.au=Sjoberg%2C+Ylva%3BCoon%2C+Ethan%3BSannel%2C+Britta%3BPannetier%2C+Romain%3BHarp%2C+Dylan+R%3BFrampton%2C+Andrew%3BPainter%2C+Scott+L%3BLyon%2C+Steve&rft.aulast=Sjoberg&rft.aufirst=Ylva&rft.date=2016-01-01&rft.volume=11&rft.issue=&rft.spage=700&rft.isbn=&rft.btitle=&rft.title=International+Conference+on+Permafrost+-+Book+of+Abstracts&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Eleventh international conference on Permafrost; exploring permafrost in a future Earth N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Document feature - illus. N1 - Last updated - 2016-10-25 N1 - CODEN - #07985 N1 - SubjectsTermNotLitGenreText - climate change; climate effects; Europe; freezing; ground water; hydrodynamics; hydrology; mires; northern Sweden; numerical models; peatlands; permafrost; Scandinavia; seasonal variations; Sweden; temperature; Western Europe ER - TY - JOUR T1 - Recent cirum-Arctic ice-wedge degradation and its hydrological impacts AN - 1828845124; 2016-087999 JF - International Conference on Permafrost - Book of Abstracts AU - Liljedahl, Anna K AU - Boike, Julia AU - Daanen, Ronald P AU - Fedorov, Alexander N (Aleksandr N) AU - Frost, Gerald V AU - Grosse, Guido AU - Hinzman, Larry D AU - Iijima, Yoshihiro AU - Jorgenson, Janet C AU - Matveyeva, Nadya AU - Necsoiu, Marius AU - Raynolds, Martha K AU - Romanovsky, Vladimir E AU - Schulla, Joerg AU - Tape, Ken D AU - Walker, Donald A AU - Wilson, Cathy J AU - Yabuki, Hironori Y1 - 2016 PY - 2016 DA - 2016 SP - 926 PB - [publisher varies], [location varies] VL - 11 KW - United States KW - hydrology KW - permafrost KW - degradation KW - Arctic region KW - Russian Federation KW - Russian Arctic KW - periglacial features KW - ice wedges KW - thawing KW - climate change KW - Commonwealth of Independent States KW - Canada KW - ice KW - runoff KW - climate effects KW - ground ice KW - Alaska KW - glacial geology KW - frozen ground KW - polygons KW - meltwater KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828845124?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Conference+on+Permafrost+-+Book+of+Abstracts&rft.atitle=Recent+cirum-Arctic+ice-wedge+degradation+and+its+hydrological+impacts&rft.au=Liljedahl%2C+Anna+K%3BBoike%2C+Julia%3BDaanen%2C+Ronald+P%3BFedorov%2C+Alexander+N+%28Aleksandr+N%29%3BFrost%2C+Gerald+V%3BGrosse%2C+Guido%3BHinzman%2C+Larry+D%3BIijima%2C+Yoshihiro%3BJorgenson%2C+Janet+C%3BMatveyeva%2C+Nadya%3BNecsoiu%2C+Marius%3BRaynolds%2C+Martha+K%3BRomanovsky%2C+Vladimir+E%3BSchulla%2C+Joerg%3BTape%2C+Ken+D%3BWalker%2C+Donald+A%3BWilson%2C+Cathy+J%3BYabuki%2C+Hironori&rft.aulast=Liljedahl&rft.aufirst=Anna&rft.date=2016-01-01&rft.volume=11&rft.issue=&rft.spage=926&rft.isbn=&rft.btitle=&rft.title=International+Conference+on+Permafrost+-+Book+of+Abstracts&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Eleventh international conference on Permafrost; exploring permafrost in a future Earth N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-10-25 N1 - CODEN - #07985 N1 - SubjectsTermNotLitGenreText - Alaska; Arctic region; Canada; climate change; climate effects; Commonwealth of Independent States; degradation; frozen ground; glacial geology; ground ice; hydrology; ice; ice wedges; meltwater; periglacial features; permafrost; polygons; runoff; Russian Arctic; Russian Federation; thawing; United States ER - TY - JOUR T1 - Functional Oxide Thin Films and Nanostructures: Growth, Interface, and Applications AN - 1827881731; PQ0002903033 AB - Metal-oxides exhibiting fascinating physical/chemical properties have been focused on for decades in experimental and theoretical studies. The sensitivity of the functionalities of these oxides to microstructure, surfaces/interfaces, charges, and strain has created challenges and opportunities to materials research communities. Tremendous efforts of material synthesis, structure/defect/property characterizations, and theoretical simulations have improved our knowledge in basic science and practical applications of oxide materials. We invite authors to submit their original research articles regarding functional oxide thin films and nanostructures as well as reviews that summarize recent advances in the oxide fields. JF - Journal of Nanomaterials AU - Chen, Aiping AU - Chu, Ying-Hao AU - Li, Run-Wei AU - Fix, Thomas AU - Hu, Jia-Mian AD - Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, apchen@lanl.gov Y1 - 2016/01// PY - 2016 DA - January 2016 PB - Hindawi Publishing Corporation, P.O. Box 3079 Cuyahoga Falls OH 44223 United States VL - 2016 SN - 1687-4110, 1687-4110 KW - Biotechnology and Bioengineering Abstracts KW - oxides KW - Films KW - nanotechnology KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1827881731?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nanomaterials&rft.atitle=Functional+Oxide+Thin+Films+and+Nanostructures%3A+Growth%2C+Interface%2C+and+Applications&rft.au=Chen%2C+Aiping%3BChu%2C+Ying-Hao%3BLi%2C+Run-Wei%3BFix%2C+Thomas%3BHu%2C+Jia-Mian&rft.aulast=Chen&rft.aufirst=Aiping&rft.date=2016-01-01&rft.volume=2016&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nanomaterials&rft.issn=16874110&rft_id=info:doi/10.1155%2F2016%2F7198726 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - oxides; nanotechnology; Films DO - http://dx.doi.org/10.1155/2016/7198726 ER - TY - JOUR T1 - The Modern Temperature-Accelerated Dynamics Approach AN - 1811884580; PQ0003551844 AB - Accelerated molecular dynamics (AMD) is a class of MD-based methods used to simulate atomistic systems in which the metastable state-to-state evolution is slow compared with thermal vibrations. Temperature-accelerated dynamics (TAD) is a particularly efficient AMD procedure in which the predicted evolution is hastened by elevating the temperature of the system and then recovering the correct state-to-state dynamics at the temperature of interest. TAD has been used to study various materials applications, often revealing surprising behavior beyond the reach of direct MD. This success has inspired several algorithmic performance enhancements, as well as the analysis of its mathematical framework. Recently, these enhancements have leveraged parallel programming techniques to enhance both the spatial and temporal scaling of the traditional approach. We review the ongoing evolution of the modern TAD method and introduce the latest development: speculatively parallel TAD. JF - Annual Review of Chemical and Biomolecular Engineering AU - Zamora, Richard J AU - Uberuaga, Blas P AU - Perez, Danny AU - Voter, Arthur F AD - Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, afv@lanl.gov Y1 - 2016///0, PY - 2016 DA - 0, 2016 SP - 87 EP - 110 PB - Annual Reviews, Inc., 4139 El Camino Way Palo Alto CA 94303-0139 United States VL - 7 SN - 1947-5438, 1947-5438 KW - Biotechnology and Bioengineering Abstracts KW - accelerated molecular dynamics KW - temperature-accelerated dynamics KW - molecular dynamics KW - infrequent events KW - rare events KW - Temperature effects KW - Vibrations KW - Reviews KW - Scaling KW - Evolution KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1811884580?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Review+of+Chemical+and+Biomolecular+Engineering&rft.atitle=The+Modern+Temperature-Accelerated+Dynamics+Approach&rft.au=Zamora%2C+Richard+J%3BUberuaga%2C+Blas+P%3BPerez%2C+Danny%3BVoter%2C+Arthur+F&rft.aulast=Zamora&rft.aufirst=Richard&rft.date=2016-01-01&rft.volume=7&rft.issue=&rft.spage=87&rft.isbn=&rft.btitle=&rft.title=Annual+Review+of+Chemical+and+Biomolecular+Engineering&rft.issn=19475438&rft_id=info:doi/10.1146%2Fannurev-chembioeng-080615-033608 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-09-01 N1 - SubjectsTermNotLitGenreText - Vibrations; Temperature effects; Reviews; Scaling; Evolution DO - http://dx.doi.org/10.1146/annurev-chembioeng-080615-033608 ER - TY - JOUR T1 - Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars; CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale Crater) AN - 1800396043; 2016-055716 AB - The Windjana drill sample, a sandstone of the Dillinger member (Kimberley formation, Gale Crater, Mars), was analyzed by CheMin X-ray diffraction (XRD) in the MSL Curiosity rover. From Rietveld refinements of its XRD pattern, Windjana contains the following: sanidine (21% weight, approximately Or (sub 95) ); augite (20%); magnetite (12%); pigeonite; olivine; plagioclase; amorphous and smectitic material ( approximately 25%); and percent levels of others including ilmenite, fluorapatite, and bassanite. From mass balance on the Alpha Proton X-ray Spectrometer (APXS) chemical analysis, the amorphous material is Fe rich with nearly no other cations-like ferrihydrite. The Windjana sample shows little alteration and was likely cemented by its magnetite and ferrihydrite. From ChemCam Laser-Induced Breakdown Spectrometer (LIBS) chemical analyses, Windjana is representative of the Dillinger and Mount Remarkable members of the Kimberley formation. LIBS data suggest that the Kimberley sediments include at least three chemical components. The most K-rich targets have 5.6% K (sub 2) O, approximately 1.8 times that of Windjana, implying a sediment component with >40% sanidine, e.g., a trachyte. A second component is rich in mafic minerals, with little feldspar (like a shergottite). A third component is richer in plagioclase and in Na (sub 2) O, and is likely to be basaltic. The K-rich sediment component is consistent with APXS and ChemCam observations of K-rich rocks elsewhere in Gale Crater. The source of this sediment component was likely volcanic. The presence of sediment from many igneous sources, in concert with Curiosity's identifications of other igneous materials (e.g., mugearite), implies that the northern rim of Gale Crater exposes a diverse igneous complex, at least as diverse as that found in similar-age terranes on Earth. Abstract Copyright (2015), . The Authors. JF - Journal of Geophysical Research: Planets AU - Treiman, Allan H AU - Bish, David L AU - Vaniman, David T AU - Chipera, Steve J AU - Blake, David F AU - Ming, Doug W AU - Morris, Richard V AU - Bristow, Thomas F AU - Morrison, Shaunna M AU - Baker, Michael B AU - Rampe, Elizabeth B AU - Downs, Robert T AU - Filiberto, Justin AU - Glazner, Allen F AU - Gellert, Ralf AU - Thompson, Lucy M AU - Schmidt, Mariek E AU - Le Deit, Laetitia AU - Wiens, Roger C AU - McAdam, Amy C AU - Achilles, Cherie N AU - Edgett, Kenneth S AU - Farmer, Jack D AU - Fendrich, Kim V AU - Grotzinger, John P AU - Gupta, Sanjeev AU - Morookian, John Michael AU - Newcombe, Megan E AU - Rice, Melissa S AU - Spray, John G AU - Stolper, Edward M AU - Sumner, Dawn Y AU - Vasavada, Ashwin R AU - Yen, Albert S Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 75 EP - 106 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 1 SN - 2169-9097, 2169-9097 KW - silicates KW - alkali basalts KW - Windjana sample KW - pigeonite KW - volcanic rocks KW - X-ray diffraction data KW - sanidine KW - igneous rocks KW - augite KW - sandstone KW - olivine group KW - Mars KW - bassanite KW - cores KW - Gale Crater KW - mugearite KW - sedimentary rocks KW - pyroxene group KW - mineral composition KW - clinopyroxene KW - alkali feldspar KW - olivine KW - Curiosity Rover KW - basalts KW - orthosilicates KW - oxides KW - framework silicates KW - basaltic composition KW - chain silicates KW - plagioclase KW - sulfates KW - smectite KW - potassic composition KW - Kimberley Formation KW - Rietveld refinement KW - ferrihydrite KW - clay minerals KW - terrestrial planets KW - nesosilicates KW - provenance KW - planets KW - diagenesis KW - Mars Science Laboratory KW - sheet silicates KW - feldspar group KW - clastic rocks KW - magnetite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800396043?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Mineralogy%2C+provenance%2C+and+diagenesis+of+a+potassic+basaltic+sandstone+on+Mars%3B+CheMin+X-ray+diffraction+of+the+Windjana+sample+%28Kimberley+area%2C+Gale+Crater%29&rft.au=Treiman%2C+Allan+H%3BBish%2C+David+L%3BVaniman%2C+David+T%3BChipera%2C+Steve+J%3BBlake%2C+David+F%3BMing%2C+Doug+W%3BMorris%2C+Richard+V%3BBristow%2C+Thomas+F%3BMorrison%2C+Shaunna+M%3BBaker%2C+Michael+B%3BRampe%2C+Elizabeth+B%3BDowns%2C+Robert+T%3BFiliberto%2C+Justin%3BGlazner%2C+Allen+F%3BGellert%2C+Ralf%3BThompson%2C+Lucy+M%3BSchmidt%2C+Mariek+E%3BLe+Deit%2C+Laetitia%3BWiens%2C+Roger+C%3BMcAdam%2C+Amy+C%3BAchilles%2C+Cherie+N%3BEdgett%2C+Kenneth+S%3BFarmer%2C+Jack+D%3BFendrich%2C+Kim+V%3BGrotzinger%2C+John+P%3BGupta%2C+Sanjeev%3BMorookian%2C+John+Michael%3BNewcombe%2C+Megan+E%3BRice%2C+Melissa+S%3BSpray%2C+John+G%3BStolper%2C+Edward+M%3BSumner%2C+Dawn+Y%3BVasavada%2C+Ashwin+R%3BYen%2C+Albert+S&rft.aulast=Treiman&rft.aufirst=Allan&rft.date=2016-01-01&rft.volume=121&rft.issue=1&rft.spage=75&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2015JE004932 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 187 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-06-30 N1 - SubjectsTermNotLitGenreText - alkali basalts; alkali feldspar; augite; basaltic composition; basalts; bassanite; chain silicates; clastic rocks; clay minerals; clinopyroxene; cores; Curiosity Rover; diagenesis; feldspar group; ferrihydrite; framework silicates; Gale Crater; igneous rocks; Kimberley Formation; magnetite; Mars; Mars Science Laboratory; mineral composition; mugearite; nesosilicates; olivine; olivine group; orthosilicates; oxides; pigeonite; plagioclase; planets; potassic composition; provenance; pyroxene group; Rietveld refinement; sandstone; sanidine; sedimentary rocks; sheet silicates; silicates; smectite; sulfates; terrestrial planets; volcanic rocks; Windjana sample; X-ray diffraction data DO - http://dx.doi.org/10.1002/2015JE004932 ER - TY - JOUR T1 - Exploration of Circadian Rhythms in Patients with Bilateral Vestibular Loss. AN - 1800131042; 27341473 AB - BACKGROUNDNew insights have expanded the influence of the vestibular system to the regulation of circadian rhythmicity. Indeed, hypergravity or bilateral vestibular loss (BVL) in rodents causes a disruption in their daily rhythmicity for several days. The vestibular system thus influences hypothalamic regulation of circadian rhythms on Earth, which raises the question of whether daily rhythms might be altered due to vestibular pathology in humans. The aim of this study was to evaluate human circadian rhythmicity in people presenting a total bilateral vestibular loss (BVL) in comparison with control participants.METHODOLOGY AND PRINCIPAL FINDINGSNine patients presenting a total idiopathic BVL and 8 healthy participants were compared. Their rest-activity cycle was recorded by actigraphy at home over 2 weeks. The daily rhythm of temperature was continuously recorded using a telemetric device and salivary cortisol was recorded every 3 hours from 6:00AM to 9:00PM over 24 hours. BVL patients displayed a similar rest activity cycle during the day to control participants but had higher nocturnal actigraphy, mainly during weekdays. Sleep efficiency was reduced in patients compared to control participants. Patients had a marked temperature rhythm but with a significant phase advance (73 min) and a higher variability of the acrophase (from 2:24 PM to 9:25 PM) with no correlation to rest-activity cycle, contrary to healthy participants. Salivary cortisol levels were higher in patients compared to healthy people at any time of day.CONCLUSIONWe observed a marked circadian rhythmicity of temperature in patients with BVL, probably due to the influence of the light dark cycle. However, the lack of synchronization between the temperature and rest-activity cycle supports the hypothesis that the vestibular inputs are salient input to the circadian clock that enhance the stabilization and precision of both external and internal entrainment. JF - PloS one AU - Martin, Tristan AU - Moussay, Sébastien AU - Bulla, Ingo AU - Bulla, Jan AU - Toupet, Michel AU - Etard, Olivier AU - Denise, Pierre AU - Davenne, Damien AU - Coquerel, Antoine AU - Quarck, Gaëlle AD - UNICAEN, COMETE, 14032 Caen, France. ; Theoretical Biology and Biophysics, Group T-6, Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America. ; Department of Mathematics, University of Bergen, P.O. Box 7800, 5020 Bergen, Norway. ; Centre d'explorations fonctionnelles oto-neurologiques, 10 rue Falguière, 75 015 Paris, France. ; Normandie Universite, Caen, France. Y1 - 2016 PY - 2016 DA - 2016 SP - 1 VL - 11 IS - 6 KW - Index Medicus UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800131042?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=PloS+one&rft.atitle=Exploration+of+Circadian+Rhythms+in+Patients+with+Bilateral+Vestibular+Loss.&rft.au=Martin%2C+Tristan%3BMoussay%2C+S%C3%A9bastien%3BBulla%2C+Ingo%3BBulla%2C+Jan%3BToupet%2C+Michel%3BEtard%2C+Olivier%3BDenise%2C+Pierre%3BDavenne%2C+Damien%3BCoquerel%2C+Antoine%3BQuarck%2C+Ga%C3%ABlle&rft.aulast=Martin&rft.aufirst=Tristan&rft.date=2016-01-01&rft.volume=11&rft.issue=6&rft.spage=e0155067&rft.isbn=&rft.btitle=&rft.title=PloS+one&rft.issn=1932-6203&rft_id=info:doi/10.1371%2Fjournal.pone.0155067 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-06-25 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1371/journal.pone.0155067 ER - TY - JOUR T1 - Weighing the importance of surface forcing on sea ice: a September 2007 modelling study AN - 1780499163; PQ0002835004 AB - The sea ice minimum of September 2007 is represented in a 50-year simulation using the Los Alamos Sea Ice Model, CICE, in spite of the fact that only four atmospheric forcing fields vary interannually in the model simulation; all other atmospheric and oceanic forcing data are monthly mean climatologies. Simulation results support prior conclusions that an anomalous pressure pattern, ice-ocean albedo feedback effects on sea surface temperature, and the long-term sea ice thinning trend are primarily responsible for the sea ice minimum of 2007. In addition, the simulation indicates that cloudiness, precipitation, and other forcing quantities were of secondary importance. Here we explore the importance of applied atmospheric and oceanic surface forcing for the 2007 sea ice minimum event, along with a group of model parameterizations that control the surface radiation budget in sea ice (melt ponds). Of the oceanic forcing fields acting on sea ice, only the sea surface temperature varied interannually for simulating the 2007 event. Interannual variations of temperature and humidity play a role in the radiation balance applied at the snow and ice surface, and they both have the potential to significantly affect the ice edge. However, humidity (exclusive of clouds) is far less influential on ice volume than is air temperature. The inclusion of albedo changes due to melt ponding is also crucial for determining the radiation forcing experienced by the ice. We compare the effects of four different pond parameterizations now available in CICE for the September 2007 case, and find that while details may differ, they all are able to represent the 2007 event. The impact of feedbacks associated with the radiation balance differs among the pond simulations, presenting a key topic for future study. JF - Quarterly Journal of the Royal Meteorological Society AU - Hunke, E C AD - Los Alamos National Laboratory, Los Alamos, NM, USA. Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 539 EP - 545 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 142 IS - 695 SN - 0035-9009, 0035-9009 KW - Oceanic Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Sea surface KW - USA, New Mexico, Los Alamos KW - Ponds KW - Sea surface temperature anomalies KW - Radiation KW - Sea Ice KW - Cloudiness KW - Ocean-atmosphere system KW - Pressure patterns KW - Climatology KW - Sea ice melt ponds KW - Modelling KW - Temperature effects KW - Marine KW - Ice KW - Simulation Analysis KW - Albedo KW - Radiation balance KW - Temperature KW - Brackish KW - Humidity KW - Precipitation KW - Water temperature KW - Inland water environment KW - Clouds KW - Interannual variability KW - Sea ice KW - Numerical simulations KW - Atmospheric forcing KW - Temperature trends KW - Sea ice models KW - SW 0810:General KW - O 4080:Pollution - Control and Prevention KW - M2 551.326:Floating Ice (551.326) KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780499163?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Quarterly+Journal+of+the+Royal+Meteorological+Society&rft.atitle=Weighing+the+importance+of+surface+forcing+on+sea+ice%3A+a+September+2007+modelling+study&rft.au=Hunke%2C+E+C&rft.aulast=Hunke&rft.aufirst=E&rft.date=2016-01-01&rft.volume=142&rft.issue=695&rft.spage=539&rft.isbn=&rft.btitle=&rft.title=Quarterly+Journal+of+the+Royal+Meteorological+Society&rft.issn=00359009&rft_id=info:doi/10.1002%2Fqj.2353 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-04-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Temperature effects; Sea surface; Albedo; Atmospheric forcing; Ocean-atmosphere system; Water temperature; Inland water environment; Ponds; Modelling; Radiation balance; Humidity; Clouds; Sea ice; Sea surface temperature anomalies; Interannual variability; Numerical simulations; Cloudiness; Pressure patterns; Climatology; Temperature trends; Sea ice melt ponds; Sea ice models; Ice; Radiation; Simulation Analysis; Sea Ice; Temperature; Precipitation; USA, New Mexico, Los Alamos; Marine; Brackish DO - http://dx.doi.org/10.1002/qj.2353 ER - TY - JOUR T1 - Assembly of Active Bacterial and Fungal Communities Along a Natural Environmental Gradient AN - 1762368048; PQ0002491273 AB - Dormancy is thought to promote biodiversity within microbial communities, but how assembly of the active community responds to changes in environmental conditions is unclear. To measure the active and dormant communities of bacteria and fungi colonizing decomposing litter in maple forests, we targeted ribosomal genes and transcripts across a natural environmental gradient. Within bacterial and fungal communities, the active and dormant communities were phylogenetically distinct, but patterns of phylogenetic clustering varied. For bacteria, active communities were significantly more clustered than dormant communities, while the reverse was found for fungi. The proportion of operational taxonomic units (OTUs) classified as active and the degree of phylogenetic clustering of the active bacterial communities declined with increasing pH and decreasing C/N. No significant correlations were found for the fungal community. The opposing pattern of phylogenetic clustering in dormant and active communities and the differential response of active communities to environmental gradients suggest that dormancy differentially structures bacterial and fungal communities. JF - Microbial Ecology AU - Mueller, Rebecca C AU - Gallegos-Graves, Laverne AU - Zak, Donald R AU - Kuske, Cheryl R AD - Bioscience Division, M888, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA, beckymueller@gmail.com Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 57 EP - 67 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 71 IS - 1 SN - 0095-3628, 0095-3628 KW - Microbiology Abstracts C: Algology, Mycology & Protozoology; ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts; Microbiology Abstracts B: Bacteriology KW - Phylogeny KW - Bacteria KW - Litter KW - Fungi KW - Environmental impact KW - Forests KW - Biodiversity KW - Environmental factors KW - Community composition KW - Environmental conditions KW - Dormancy KW - pH effects KW - Phylogenetics KW - J 02310:Genetics & Taxonomy KW - Q1 08482:Ecosystems and energetics KW - D 04040:Ecosystem and Ecology Studies KW - K 03310:Genetics & Taxonomy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1762368048?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Microbial+Ecology&rft.atitle=Assembly+of+Active+Bacterial+and+Fungal+Communities+Along+a+Natural+Environmental+Gradient&rft.au=Mueller%2C+Rebecca+C%3BGallegos-Graves%2C+Laverne%3BZak%2C+Donald+R%3BKuske%2C+Cheryl+R&rft.aulast=Mueller&rft.aufirst=Rebecca&rft.date=2016-01-01&rft.volume=71&rft.issue=1&rft.spage=57&rft.isbn=&rft.btitle=&rft.title=Microbial+Ecology&rft.issn=00953628&rft_id=info:doi/10.1007%2Fs00248-015-0655-y LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Number of references - 59 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Community composition; Litter; Fungi; Environmental impact; Biodiversity; Dormancy; pH effects; Environmental factors; Phylogenetics; Phylogeny; Forests; Environmental conditions; Bacteria DO - http://dx.doi.org/10.1007/s00248-015-0655-y ER - TY - JOUR T1 - Shale gas wastewater management under uncertainty. AN - 1728259555; 26433360 AB - This work presents an optimization framework for evaluating different wastewater treatment/disposal options for water management during hydraulic fracturing (HF) operations. This framework takes into account both cost-effectiveness and system uncertainty. HF has enabled rapid development of shale gas resources. However, wastewater management has been one of the most contentious and widely publicized issues in shale gas production. The flowback and produced water (known as FP water) generated by HF may pose a serious risk to the surrounding environment and public health because this wastewater usually contains many toxic chemicals and high levels of total dissolved solids (TDS). Various treatment/disposal options are available for FP water management, such as underground injection, hazardous wastewater treatment plants, and/or reuse. In order to cost-effectively plan FP water management practices, including allocating FP water to different options and planning treatment facility capacity expansion, an optimization model named UO-FPW is developed in this study. The UO-FPW model can handle the uncertain information expressed in the form of fuzzy membership functions and probability density functions in the modeling parameters. The UO-FPW model is applied to a representative hypothetical case study to demonstrate its applicability in practice. The modeling results reflect the tradeoffs between economic objective (i.e., minimizing total-system cost) and system reliability (i.e., risk of violating fuzzy and/or random constraints, and meeting FP water treatment/disposal requirements). Using the developed optimization model, decision makers can make and adjust appropriate FP water management strategies through refining the values of feasibility degrees for fuzzy constraints and the probability levels for random constraints if the solutions are not satisfactory. The optimization model can be easily integrated into decision support systems for shale oil/gas lifecycle management. JF - Journal of environmental management AU - Zhang, Xiaodong AU - Sun, Alexander Y AU - Duncan, Ian J AD - EES-16, Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM 87545, USA; Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78713, USA. Electronic address: gerryzxd@gmail.com. ; Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78713, USA. Y1 - 2016/01/01/ PY - 2016 DA - 2016 Jan 01 SP - 188 EP - 198 VL - 165 KW - Waste Water KW - 0 KW - Water Pollutants, Chemical KW - Water KW - 059QF0KO0R KW - Index Medicus KW - Uncertainty KW - Wastewater management KW - Shale gas KW - Hydraulic fracturing KW - Hydraulic Fracking KW - Environmental Monitoring KW - Reproducibility of Results KW - Water Purification -- economics KW - Water Purification -- methods KW - Models, Theoretical KW - Water Pollution -- analysis KW - Water Pollutants, Chemical -- chemistry KW - Waste Water -- chemistry KW - Water Pollutants, Chemical -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1728259555?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+management&rft.atitle=Shale+gas+wastewater+management+under+uncertainty.&rft.au=Zhang%2C+Xiaodong%3BSun%2C+Alexander+Y%3BDuncan%2C+Ian+J&rft.aulast=Zhang&rft.aufirst=Xiaodong&rft.date=2016-01-01&rft.volume=165&rft.issue=&rft.spage=188&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+management&rft.issn=1095-8630&rft_id=info:doi/10.1016%2Fj.jenvman.2015.09.038 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-06-07 N1 - Date created - 2015-10-28 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.jenvman.2015.09.038 ER - TY - JOUR T1 - Daily to decadal variability of size-fractionated iron and iron-binding ligands at the Hawaii Ocean Time-series Station ALOHA AN - 1780802342; 2016-032434 AB - Time-series studies of trace metals in the ocean are rare, but they are critical for evaluating both the residence times of the metals themselves and also the timescales over which the marine ecosystems that depend on micronutrient metals can change. In this paper we present two new time-series of the essential micronutrient iron (Fe) taken from the Hawaii Ocean Time-series (HOT) site, Station ALOHA (22.75 degrees N, 158 degrees W): a set of intermittent monthly surface samples taken from approximately 50 dates between 1999 and 2011 by the HOT program, and a daily-resolved sample set from summer 2012 and 2013 containing approximately 80 surface samples and 7 profiles to 1500 m depth. The long-term monthly climatology of surface total dissolvable Fe (TDFe) concentrations covaried with the seasonal cycle of continental Asian dust deposition at Hawaii, indicating dust as the major source of TDFe to ALOHA surface waters and a short residence time for TDFe (order approximately months). During the daily summer time-series, surface Fe was most variable in the larger size fractions (>0.4 mu m particulate and 0.02-0.4 mu m colloidal) and nearly constant in the smallest (<0.02 mu m) soluble size fractions, confirming that the larger size fractions have shorter residence times with respect to scavenging/settling. The most significant Fe event lasted three days in early August and "cascaded" through the Fe size fractions from largest to smallest; lacking evidence that dust triggered this event, we correlated it with the arrival of the edge of an anticyclonic eddy and an increase in diatom abundance at ALOHA. The surface Fe-binding ligand daily time-series showed that excess ligand concentrations lagged dFe by 1-2 days, revealing a short residence time of ligands in the central North Pacific likely due to photochemical degradation. In the ferricline, the dissolved Fe (dFe) linear relationship with apparent oxygen utilization was used to establish a water column dFe:C ratio of 3.12 + or - 0.11 mu mol/mol and a pre-formed dFe concentration of 0.067 + or - 0.009 nmol/kg that defines the central/mode waters of Station ALOHA. Finally, in deep waters near 1200 m, where minimal temporal variation in dFe might be expected, dFe instead ranged over a factor of two in concentration (0.72-1.44 nmol/kg), driven by the intermittent passing of the Loihi hydrothermal plume through Station ALOHA. This study not only provides the largest number of Fe measurements made at a single location anywhere in the global ocean to date but also reveals the strength of time-series measurements for exploring mechanisms and timescales of biogeochemical events. Abstract Copyright (2015) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Fitzsimmons, Jessica N AU - Hayes, Christopher T AU - Al-Subiai, Sherain N AU - Zhang, Ruifeng AU - Morton, Peter L AU - Weisend, Rachel E AU - Ascani, Francois AU - Boyle, Edward A Y1 - 2015/12/15/ PY - 2015 DA - 2015 Dec 15 SP - 303 EP - 324 PB - Elsevier, New York, NY VL - 171 SN - 0016-7037, 0016-7037 KW - United States KW - decadal variations KW - sea water KW - University of Hawaii KW - mass spectra KW - ecosystems KW - bonding KW - iron KW - Hawaii Ocean Time-Series Station ALOHA KW - ligands KW - sediments KW - academic institutions KW - spectra KW - particulate materials KW - diurnal variations KW - chemical composition KW - Asia KW - colloidal materials KW - Honolulu County Hawaii KW - time series analysis KW - clastic sediments KW - biochemistry KW - grain size KW - statistical analysis KW - ALOHA Station KW - solutes KW - Oahu KW - Hawaii KW - East Pacific Ocean Islands KW - satellite methods KW - nutrients KW - ICP mass spectra KW - provenance KW - deposition KW - metals KW - mathematical methods KW - dust KW - Oceania KW - Polynesia KW - remote sensing KW - MODIS KW - chemical fractionation KW - 07:Oceanography KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780802342?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Daily+to+decadal+variability+of+size-fractionated+iron+and+iron-binding+ligands+at+the+Hawaii+Ocean+Time-series+Station+ALOHA&rft.au=Fitzsimmons%2C+Jessica+N%3BHayes%2C+Christopher+T%3BAl-Subiai%2C+Sherain+N%3BZhang%2C+Ruifeng%3BMorton%2C+Peter+L%3BWeisend%2C+Rachel+E%3BAscani%2C+Francois%3BBoyle%2C+Edward+A&rft.aulast=Fitzsimmons&rft.aufirst=Jessica&rft.date=2015-12-15&rft.volume=171&rft.issue=&rft.spage=303&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2015.08.012 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 122 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-08-18 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - academic institutions; ALOHA Station; Asia; biochemistry; bonding; chemical composition; chemical fractionation; clastic sediments; colloidal materials; decadal variations; deposition; diurnal variations; dust; East Pacific Ocean Islands; ecosystems; grain size; Hawaii; Hawaii Ocean Time-Series Station ALOHA; Honolulu County Hawaii; ICP mass spectra; iron; ligands; mass spectra; mathematical methods; metals; MODIS; nutrients; Oahu; Oceania; particulate materials; Polynesia; provenance; remote sensing; satellite methods; sea water; sediments; solutes; spectra; statistical analysis; time series analysis; United States; University of Hawaii DO - http://dx.doi.org/10.1016/j.gca.2015.08.012 ER - TY - JOUR T1 - Shape-Controlled Narrow-Gap SnTe Nanostructures: From Nanocubes to Nanorods and Nanowires. AN - 1747307104; 26545157 AB - The rational design and synthesis of narrow-gap colloidal semiconductor nanocrystals (NCs) is an important step toward the next generation of solution-processable photovoltaics, photodetectors, and thermoelectric devices. SnTe NCs are particularly attractive as a Pb-free alternative to NCs of narrow-gap lead chalcogenides. Previous synthetic efforts on SnTe NCs have focused on spherical nanoparticles. Here we report new strategies for synthesis of SnTe NCs with shapes tunable from highly monodisperse nanocubes, to nanorods (NRs) with variable aspect ratios, and finally to long, straight nanowires (NWs). Reaction at high temperature quickly forms thermodynamically favored nanocubes, but low temperatures lead to elongated particles. Transmission electron microscopy studies of reaction products at various stages of the synthesis reveal that the growth and shape-focusing of monodisperse SnTe nanocubes likely involves interparticle ripening, while directional growth of NRs and NWs may be initiated by particle dimerization via oriented attachment. JF - Journal of the American Chemical Society AU - Guo, Shaojun AU - Fidler, Andrew F AU - He, Kai AU - Su, Dong AU - Chen, Gen AU - Lin, Qianglu AU - Pietryga, Jeffrey M AU - Klimov, Victor I AD - Center for Advanced Solar Photophysics, Chemistry Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States. ; Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States. ; Department of Chemical and Materials Engineering, New Mexico State University , Las Cruces, New Mexico 88003, United States. Y1 - 2015/12/09/ PY - 2015 DA - 2015 Dec 09 SP - 15074 EP - 15077 VL - 137 IS - 48 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1747307104?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+American+Chemical+Society&rft.atitle=Shape-Controlled+Narrow-Gap+SnTe+Nanostructures%3A+From+Nanocubes+to+Nanorods+and+Nanowires.&rft.au=Guo%2C+Shaojun%3BFidler%2C+Andrew+F%3BHe%2C+Kai%3BSu%2C+Dong%3BChen%2C+Gen%3BLin%2C+Qianglu%3BPietryga%2C+Jeffrey+M%3BKlimov%2C+Victor+I&rft.aulast=Guo&rft.aufirst=Shaojun&rft.date=2015-12-09&rft.volume=137&rft.issue=48&rft.spage=15074&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+American+Chemical+Society&rft.issn=1520-5126&rft_id=info:doi/10.1021%2Fjacs.5b09490 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-05-02 N1 - Date created - 2015-12-09 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/jacs.5b09490 ER - TY - JOUR T1 - Dfnworks; a HPC workflow for discrete fracture network modeling with subsurface flow and transport applications AN - 1849310965; 2016-109453 AB - dfnWorks generates discrete fracture networks (DFN) of planar polygons, creates a high quality conforming Delaunay triangulation of the intersecting DFN polygons, assigns properties (aperture, permeability) using geostatistics, sets boundary and initial conditions, solves pressure/flow in single or multi-phase fluids (water, air, CO2) using the parallel PFLOTRAN or serial FEHM, and solves for transport using Lagrangian particle tracking. We outline the dfnWorks workflow and present applications from a range of fractured rock systems. dfnWorks (http://www.lanl.gov/expertise/teams/view/dfnworks) is composed of three main components, all of which are freely available. dfnGen generates a distribution of fracture polygons from site characterization data (statistics or deterministic fractures) and utilizes the FRAM (Feature Rejection Algorithm for Meshing) to guarantee the mesh generation package LaGriT (lagrit.lanl.gov) will generate a high quality conforming Delaunay triangular mesh. dfnWorks links the mesh to either PFLOTRAN (pflotran.org) or FEHM (fehm.lanl.gov) for solving flow and transport. The various physics options available in FEHM and PFLOTRAN such as single and multi-phase flow and reactive transport are all available with appropriate initial and boundary conditions and material property models. dfnTrans utilizes explicit Lagrangian particle tracking on the DFN using a velocity field reconstructed from the steady state pressure/flow field solution obtained in PFLOTRAN or FEHM. Applications are demonstrated for nuclear waste repository in fractured granite, CO2 sequestration and extraction of unconventional hydrocarbon resources. JF - American Geophysical Union Fall Meeting AU - Gable, Carl W AU - Hyman, Jeffrey AU - Karra, Satish AU - Makedonska, Natalia AU - Painter, Scott L AU - Viswanathan, Hari Selvi AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H53I EP - 06 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310965?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Dfnworks%3B+a+HPC+workflow+for+discrete+fracture+network+modeling+with+subsurface+flow+and+transport+applications&rft.au=Gable%2C+Carl+W%3BHyman%2C+Jeffrey%3BKarra%2C+Satish%3BMakedonska%2C+Natalia%3BPainter%2C+Scott+L%3BViswanathan%2C+Hari+Selvi%3BAnonymous&rft.aulast=Gable&rft.aufirst=Carl&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - The state of stress beyond the borehole AN - 1849310749; 2016-109396 AB - The state of stress controls all in-situ reservoir activities and yet we lack the quantitative means to measure it. This problem is important in light of the fact that the subsurface provides more than 80 percent of the energy used in the United States and serves as a reservoir for geological carbon sequestration, used fuel disposition, and nuclear waste storage. Adaptive control of subsurface fractures and fluid flow is a crosscutting challenge being addressed by the new Department of Energy SubTER Initiative that has the potential to transform subsurface energy production and waste storage strategies. Our methodology to address the above mentioned matter is based on a novel Advance Multi-Physics Tomographic (AMT) approach for determining the state of stress, thereby facilitating our ability to monitor and control subsurface geomechanical processes. We developed the AMT algorithm for deriving state-of-stress from integrated density and seismic velocity models and demonstrate the feasibility by applying the AMT approach to synthetic data sets to assess accuracy and resolution of the method as a function of the quality and type of geophysical data. With this method we can produce regional- to basin-scale maps of the background state of stress and identify regions where stresses are changing. Our approach is based on our major advances in the joint inversion of gravity and seismic data to obtain the elastic properties for the subsurface; and coupling afterwards the output from this joint-inversion with theoretical model such that strain (and subsequently) stress can be computed. Ultimately we will obtain the differential state of stress over time to identify and monitor critically stressed faults and evolving regions within the reservoir, and relate them to anthropogenic activities such as fluid/gas injection. JF - American Geophysical Union Fall Meeting AU - Johnson, Paul A AU - Coblentz, David D AU - Maceira, Monica AU - Delorey, Andrew A AU - Guyer, Robert A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51M EP - 1564 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310749?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+state+of+stress+beyond+the+borehole&rft.au=Johnson%2C+Paul+A%3BCoblentz%2C+David+D%3BMaceira%2C+Monica%3BDelorey%2C+Andrew+A%3BGuyer%2C+Robert+A%3BAnonymous&rft.aulast=Johnson&rft.aufirst=Paul&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Quantitative risk assessment of CO (sub 2) sequestration in a commercial-scale EOR site AN - 1849310690; 2016-109443 AB - Enhanced Oil Recovery with CO2 (CO2-EOR) is perhaps the most feasible option for geologic CO2 sequestration (GCS), if only due to existing infrastructure and economic opportunities of associated oil production. Probably the most significant source of uncertainty of CO2 storage forecasts is heterogeneity of reservoir properties. Quantification of storage forecast uncertainty is critical for accurate assessment of risks associated with GCS in EOR fields. This study employs a response surface methodology (RSM) to quantify uncertainties of CO2 storage associated with oil production in an active CO2-EOR field. Specifically, the Morrow formation, a clastic reservoir within the Farnsworth EOR Unit (FWU) in Texas, was selected as a case study. Four uncertain parameters (i.e., independent variables) are reservoir permeability, anisotropy ratio of permeability, water-alternating-gas (WAG) time ratio, and initial oil saturation. Cumulative oil production and net CO2 injection are the output dependent variables. A 3-D FWU reservoir model, including a representative 5-spot well pattern, was constructed for CO2-oil-water multiphase flow analysis. A total of 25 permutations of 3-D reservoir simulations were executed using Eclipse simulator. After performing stepwise regression analysis, a series of response surface models of the output variables at each step were constructed and verified using appropriate goodness-of-fit measures. The R2 values are larger than 0.9 and NRMSE values are less than 5% between the simulated and predicted oil production and net CO2 injection, suggesting that the response surface (or proxy) models are sufficient for predicting CO2-EOR system behavior for FWU case. Given the range of uncertainties in the independent variables, the cumulative distribution functions (CDFs) of dependent variables were estimated using the proxy models. The predicted cumulative oil production and net CO2 injection at 95th percentile after 5 years are about 3.65 times, and 1.7 times as large as the ones at 5th percentile, respectively. These results suggest that significant uncertainties of output variables are propagated from the parameter uncertainties. While we anticipated this result in general, quantitative confirmation is probably necessary for any and all specific cases (fields or operations). JF - American Geophysical Union Fall Meeting AU - Pan, Feng AU - McPherson, Brian J O L AU - Dai, Zhenxue AU - Jia, Wei AU - Lee, Si-Yong AU - Ampomah, William AU - Viswanathan, Hari Selvi AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H53H EP - 1775 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310690?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Quantitative+risk+assessment+of+CO+%28sub+2%29+sequestration+in+a+commercial-scale+EOR+site&rft.au=Pan%2C+Feng%3BMcPherson%2C+Brian+J+O+L%3BDai%2C+Zhenxue%3BJia%2C+Wei%3BLee%2C+Si-Yong%3BAmpomah%2C+William%3BViswanathan%2C+Hari+Selvi%3BAnonymous&rft.aulast=Pan&rft.aufirst=Feng&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Uniaxial compression analysis and microdeformation characterization of Kevin Dome anhydrite caprock AN - 1849310616; 2016-109432 AB - The Department of Energy currently manages the Regional Carbon Sequestration Partnership (RCSP) in efforts to develop techniques to characterize promising CO2 storage sites, efficient and durable technology for injection, and suitable regulations for future CO2 storage. Within the RCSP, the Montana State University-Bozeman led Big Sky Carbon Sequestration Project has focused on potential CO2 storage sites, including the Kevin Dome in northern Montana. The 750 mi2 large dome lies along the north-southwest trending Sweetgrass Arch and is a natural CO2 reservoir with the potential to produce one million tonnes of CO2. The Project intends to extract and reinject this one million tonnes of CO2 back into the water-leg of the Dome within the dolomitic, middle Duperow Formation to monitor impacts on the surrounding environment and communities. The caprock system includes extremely low porosity dolomite in the upper Duperow that is overlain by the anhydrite-dominated Potlatch caprock. Core was extracted by the Project from the Wallawein 22-1 well. Six 1"-diameter sub-samples were taken at depths of 3687 and 3689' of the 4"-diameter core in both vertical and horizontal directions. Unconfined uniaxial compression tests were conducted at room temperature using an Instron 4483 load frame with a 150 kN load cell operated at a strain rate of 6.835-5 mm per second. Samples were instrumented with four strain gages to record elastic moduli and characterize fracture behavior. The Potlatch anhydrite has demonstrated to be both strong and stiff with an average uniaxial compressive strength of 150.62+ or -23.95 MPa, a Young's modulus of 89.96+ or -10.22 GPa, and a Poisson's ratio of 0.32+ or -0.05. These three variables are essential to developing geomechanical models that assess caprock responses to injection during CO2 sequestration. Petrographic characterizations of the fractured samples reveal an 80% groundmass of subeuhedral anhydrite crystals measuring 97-625 mu m and 20% 0.12-1 mm wide veins comprised of 9-35 mu m wide dolomite grains that become increasingly anhedral toward vein centers. Petrographic observations of tightly aligned anhydrite grains support the porosity of 7.5% calculated from sample densities. Such microscopic observations are key to understanding fracture propagation and permeability responses on a reservoir scale. JF - American Geophysical Union Fall Meeting AU - Malenda, Margariete GeorgeAlan AU - Frash, Luke AU - Carey, James W AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H53H EP - 1763 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310616?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Uniaxial+compression+analysis+and+microdeformation+characterization+of+Kevin+Dome+anhydrite+caprock&rft.au=Malenda%2C+Margariete+GeorgeAlan%3BFrash%2C+Luke%3BCarey%2C+James+W%3BAnonymous&rft.aulast=Malenda&rft.aufirst=Margariete&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - The DOE subsurface (SubTER) initiative; revolutionizing responsible use of the subsurface for energy production and storage AN - 1849310478; 2016-109393 AB - The subsurface supplies more than 80% of the U.S.'s total energy needs through geothermal and hydrocarbon strategies and also provides vast potential for safe storage of CO (sub 2) and disposal of nuclear waste. Responsible and efficient use of the subsurface poses many challenges, many of which require the capability to monitor and manipulate sub-surface stress, fractures, and fluid flow at all scales. Adaptive control of subsurface fractures and flow is a multi-disciplinary challenge that, if achieved, has the potential to transform all subsurface energy strategies. As part of the U.S. Department of Energy's SubTER (Subsurface Technology and Engineering Research development and demonstration) initiative, a multi-National Laboratory team is developing next-generation approaches that will allow for adaptive control of subsurface fractures and flow. SubTER has identified an initial suite of technical thrust areas to focus work, and has initiated a number of small projects. This presentation will describe early progress associated with the SubTER technical topic areas of wellbore integrity, subsurface stress and induced seismicity, permeability manipulation and new subsurface signals. It will also describe SubTER plans, and provide a venue to solicit suggestions and discuss potential partnerships associated with future research directions. JF - American Geophysical Union Fall Meeting AU - Hubbard, Susan S AU - Walck, Marianne C AU - Blankenship, Doug AU - Bonneville, Alain AU - Bromhal, Grant S AU - Daley, Thomas M AU - Pawar, Rajesh AU - Polsky, Yarom AU - Mattson, Earl AU - Mellors, Roberts J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51M EP - 1561 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310478?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+DOE+subsurface+%28SubTER%29+initiative%3B+revolutionizing+responsible+use+of+the+subsurface+for+energy+production+and+storage&rft.au=Hubbard%2C+Susan+S%3BWalck%2C+Marianne+C%3BBlankenship%2C+Doug%3BBonneville%2C+Alain%3BBromhal%2C+Grant+S%3BDaley%2C+Thomas+M%3BPawar%2C+Rajesh%3BPolsky%2C+Yarom%3BMattson%2C+Earl%3BMellors%2C+Roberts+J%3BAnonymous&rft.aulast=Hubbard&rft.aufirst=Susan&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Observation of very high passive mode thermal neutron counts by the MSL DAN instrument at Marias pass in Gale Crater AN - 1849305586; 2016-109629 AB - Since landing in August 2012, DAN has provided a wealth of scientific data from the successful surface operation in both Active mode and Passive mode. The main scientific objectives of DAN are twofold. The primary objective is to measure the bulk hydrogen abundance (in forms of water or hydrated minerals) of the subsurface. The secondary objective is to measure the background neutron environment at the surface. DAN achieves the first objective by using the pulsed neutron generator (PNG) as a pulsed 14 MeV neutron source (active mode). When no neutron pulse is used (passive mode), DAN measures the neutron background environment at the Martian surface. The DAN active data have extensively and successfully used in estimating the near-surface contents of hydrogen (in terms of "water equivalent hydrogen" or WEH) and chlorine (in terms of "absorption equivalent chlorine" or AEC) at multiple locations in Gale crater. In the mean time, DAN has been accumulating the passive mode data in almost all sols since landing, and it is the main topic of this presentation. Particularly, we want to show the DAN data on Sol 991 and 992 where we observed very high passive thermal neutron count--a factor of approximately 2 higher than usual count. As a reminder, note that many different factors would influence the amplitude of DAN passive thermal neutron counts--GCR condition, soil compositions, water/chlorine contents, etc. The Sol 991/992 location, which is at a region near a rock target called Elk in Marias Pass, was also analyzed by another MSL instrument ChemCAM. And interestingly, its data show that the Elk target is estimated to contain as high as 80 wt% of SiO (sub 2) , which is radically different from what we have used as a reference soil composition for the interpretation of the DAN passive data. This means that the DAN passive data simulations have to be revisited to account for different soil composition data at the Elk target region. In the final presentation, we will present new simulation results based on the ChemCAM measured soil composition at Elk and the impact of water/chlorine content variation to the DAN passive thermal neutron counts. The DAN active data at Elk will be discussed in a companion paper by M. Litvak. JF - American Geophysical Union Fall Meeting AU - Jun, Insoo AU - Mitrofanov, Igor G AU - Litvak, Maxim L (Maksim L) AU - Sanin, Anton B AU - Martinez Sierra, Luz M AU - Frydenvang, Jens AU - Fedosov, Fedor AU - Golovin, Dmitry (Dmitriy) AU - Hardgrove, Craig J AU - Harshman, Karl AU - Kozyrev, Alexander (Aleksandr) AU - Malakhov, Alexey V (Aleksey V) AU - Mischna, Michael A AU - Moersch, Jeffrey AU - Mokrousov, Maxim (Maksim) AU - Nikiforov, Sergey AU - Tate, Christopher G AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P43B EP - 2113 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849305586?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Observation+of+very+high+passive+mode+thermal+neutron+counts+by+the+MSL+DAN+instrument+at+Marias+pass+in+Gale+Crater&rft.au=Jun%2C+Insoo%3BMitrofanov%2C+Igor+G%3BLitvak%2C+Maxim+L+%28Maksim+L%29%3BSanin%2C+Anton+B%3BMartinez+Sierra%2C+Luz+M%3BFrydenvang%2C+Jens%3BFedosov%2C+Fedor%3BGolovin%2C+Dmitry+%28Dmitriy%29%3BHardgrove%2C+Craig+J%3BHarshman%2C+Karl%3BKozyrev%2C+Alexander+%28Aleksandr%29%3BMalakhov%2C+Alexey+V+%28Aleksey+V%29%3BMischna%2C+Michael+A%3BMoersch%2C+Jeffrey%3BMokrousov%2C+Maxim+%28Maksim%29%3BNikiforov%2C+Sergey%3BTate%2C+Christopher+G%3BAnonymous&rft.aulast=Jun&rft.aufirst=Insoo&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - ChemCam first discovery of high silica sediments in Gale Crater AN - 1849302498; 2016-109635 AB - On sol 991, The Curiosity rover ascended a steep slope to Marias Pass in Gale Crater. Close to the top, ChemCam analyzed the rock target Elk from an apparent bright unit. Utilizing the new elemental calibration implemented for ChemCam in the summer of 2015, four of five points on Elk were measured to contain 76-82 wt% SiO (sub 2) and >3 wt% TiO (sub 2) , whereas the last point showed elevated CaSO (sub 4) . The Elk target is identified to be part of the Murray formation, and hence related to the Pahrump area mudstones that were subjected to intensive studies by the Curiosity rover team over the sols 758-948. While the Murray formation west of Elk did show elevated SiO (sub 2) ( approximately 65 wt%) compared to the Pahrump area, no targets with similarly high SiO (sub 2) wt% as Elk were observed, thus prompting--together with detection of anomalously high DAN H signals in the same area--the Curiosity rover to return to the Elk target area for additional analyses. This return led to numerous additional high Si observations (targets Pistol, Mary, Shepard, Dublin Gulch and Frog) that all corroborated the initial high Si observation at Elk. Additionally, the Alpha Particle X-ray Spectrometer (APXS) analyzed the target Lamoose and found SiO (sub 2) content in excess of 72 wt% and moderately elevated TiO (sub 2) . Considering the difference in footprint (1.7 cm for APXS vs approximately 400mu m for ChemCam) and the fact that the target couldn't be brushed, this is considered a good corroboration of the very high Si observed with ChemCam. These targets suggest that the Elk-area targets represent an end-member of the Murray formation, but there are multiple working hypotheses for the origin of the high SiO (sub 2) and TiO (sub 2) in these: 1. primary precipitates from the water column of a lake, 2. a post-depositional leaching/weathering front and 3. a hydrothermal silica precipitate. JF - American Geophysical Union Fall Meeting AU - Frydenvang, Jens AU - Gasda, Patrick J AU - Wiens, Roger C AU - Newsom, Horton E AU - Bridges, John AU - Gasnault, Olivier AU - Maurice, Sylvestre AU - Forni, Olivier AU - Mangold, Nicolas AU - Cousin, Agnes AU - Payre, Valerie AU - Anderson, Ryan B AU - Mitrofanov, Igor G AU - Jun, Insoo AU - Rice, Melissa S AU - Milliken, Ralph AU - Edwards, Peter AU - Vaniman, David T AU - Morris, Richard V AU - Blake, David F AU - Gellert, Ralf AU - Thompson, Lucy M AU - Clark, Benton C AU - Hurowitz, Joel AU - Sumner, Dawn Y AU - Ehlmann, Bethany L AU - Fraeman, Abigail AU - Kinch, Kjartan M AU - Madsen, Morten B AU - Calef, Fred AU - Grotzinger, John P AU - Vasavada, Ashwin R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P43B EP - 2119 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849302498?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=ChemCam+first+discovery+of+high+silica+sediments+in+Gale+Crater&rft.au=Frydenvang%2C+Jens%3BGasda%2C+Patrick+J%3BWiens%2C+Roger+C%3BNewsom%2C+Horton+E%3BBridges%2C+John%3BGasnault%2C+Olivier%3BMaurice%2C+Sylvestre%3BForni%2C+Olivier%3BMangold%2C+Nicolas%3BCousin%2C+Agnes%3BPayre%2C+Valerie%3BAnderson%2C+Ryan+B%3BMitrofanov%2C+Igor+G%3BJun%2C+Insoo%3BRice%2C+Melissa+S%3BMilliken%2C+Ralph%3BEdwards%2C+Peter%3BVaniman%2C+David+T%3BMorris%2C+Richard+V%3BBlake%2C+David+F%3BGellert%2C+Ralf%3BThompson%2C+Lucy+M%3BClark%2C+Benton+C%3BHurowitz%2C+Joel%3BSumner%2C+Dawn+Y%3BEhlmann%2C+Bethany+L%3BFraeman%2C+Abigail%3BKinch%2C+Kjartan+M%3BMadsen%2C+Morten+B%3BCalef%2C+Fred%3BGrotzinger%2C+John+P%3BVasavada%2C+Ashwin+R%3BAnonymous&rft.aulast=Frydenvang&rft.aufirst=Jens&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Sub-model partial least squares for improved accuracy in quantitative laser induced breakdown spectroscopy AN - 1849302300; 2016-109666 AB - One of the primary challenges faced by the ChemCam instrument on the Curiosity Mars rover is developing a regression model that can accurately predict the composition of the wide range of target types encountered (basalts, calcium sulfate, feldspar, oxides, etc.). The original calibration used 69 rock standards to train a partial least squares (PLS) model for each major element. By expanding the suite of calibration samples to >400 targets spanning a wider range of compositions, the accuracy of the model was improved, but some targets with "extreme" compositions (e.g. pure minerals) were still poorly predicted. We have therefore developed a simple method, referred to as "submodel PLS", to improve the performance of PLS across a wide range of target compositions. In addition to generating a "full" (0-100 wt.%) PLS model for the element of interest, we also generate several overlapping submodels (e.g. for SiO2, we generate "low" (0-50 wt.%), "mid" (30-70 wt.%), and "high" (60-100 wt.%) models). The submodels are generally more accurate than the "full" model for samples within their range because they are able to adjust for matrix effects that are specific to that range. To predict the composition of an unknown target, we first predict the composition with the submodels and the "full" model. Then, based on the predicted composition from the "full" model, the appropriate submodel prediction can be used (e.g. if the full model predicts a low composition, use the "low" model result, which is likely to be more accurate). For samples with "full" predictions that occur in a region of overlap between submodels, the submodel predictions are "blended" using a simple linear weighted sum. The submodel PLS method shows improvements in most of the major elements predicted by ChemCam and reduces the occurrence of negative predictions for low wt.% targets. Submodel PLS is currently being used in conjunction with ICA regression for the major element compositions of ChemCam data. JF - American Geophysical Union Fall Meeting AU - Anderson, Ryan B AU - Clegg, Samuel M AU - Frydenvang, Jens AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P43D EP - 2152 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849302300?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Sub-model+partial+least+squares+for+improved+accuracy+in+quantitative+laser+induced+breakdown+spectroscopy&rft.au=Anderson%2C+Ryan+B%3BClegg%2C+Samuel+M%3BFrydenvang%2C+Jens%3BAnonymous&rft.aulast=Anderson&rft.aufirst=Ryan&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - When do volcanic eruptions make lightning? Observations from Sakurajima, Japan AN - 1849300342; 2016-106135 AB - Previous radio frequency (RF) observations of volcanic lightning have revealed that electrical activity frequently occurs concurrent with the onset of an explosive volcanic event. Typically, a myriad of electrical impulses originating from directly above the vent are observed first and the ensemble has durations of several seconds. The impulses are distinct from those produced by typical types of thunderstorm lightning, and have earned the moniker "continuous RF" due to their high rate and long-lasting nature . Several seconds after the onset of these impulses, small (100s of meters to several kilometers) lightning discharges occur in the plume and near the vent, and have electrical signatures similar to typical thunderstorm lightning. In eruptions with plume heights reaching 8-10 km or more, large scale (10s of kilometers) lightning discharges are observed throughout the plume several minutes after the onset of an explosive event.In May 2015, a campaign began to study the various types of small-scale electrical activity, including continuous RF, during explosive eruptions of Sakurajima volcano in Kyushu, Japan. The volcano was instrumented with two seismometers, two infrasound arrays, a high sensitivity video camera, an infrared camera, two high speed video cameras, still cameras, a 10-station Lightning Mapping Array, slow and fast electric field change sensors, and a broadband very high frequency (VHF) antenna. With these instruments, a robust data set of both the volcanic activity and electrical activity was collected. The preliminary data have revealed brief (1-2 seconds) bursts of continuous RF simultaneous with the onset of the more energetic explosions. Occurrence of continuous RF may be linked to mass eruption rate, explosivity, or grain size. Due to its unique nature, detection of continuous RF is an unambiguous indicator of explosive volcanic activity and is therefore useful for real-time volcano monitoring. JF - American Geophysical Union Fall Meeting AU - Behnke, Sonja A AU - McNutt, Stephen Russell AU - Thomas, Ronald J AU - Smith, Cassandra M AU - Edens, Harald E AU - Van Eaton, Alexa R AU - Cimarelli, Corrado AU - Cigala, Valeria AU - Michel, Christopher W AU - Miki, Daisuke AU - Iguchi, Masato AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V44B EP - 02 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849300342?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=When+do+volcanic+eruptions+make+lightning%3F+Observations+from+Sakurajima%2C+Japan&rft.au=Behnke%2C+Sonja+A%3BMcNutt%2C+Stephen+Russell%3BThomas%2C+Ronald+J%3BSmith%2C+Cassandra+M%3BEdens%2C+Harald+E%3BVan+Eaton%2C+Alexa+R%3BCimarelli%2C+Corrado%3BCigala%2C+Valeria%3BMichel%2C+Christopher+W%3BMiki%2C+Daisuke%3BIguchi%2C+Masato%3BAnonymous&rft.aulast=Behnke&rft.aufirst=Sonja&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Internal convection on Ceres; a possible explanation for dome formation AN - 1849299593; 2016-105889 AB - Numerical 2-D whole-body simulations of the evolution of Ceres' internal dynamics and thermal structure over its history indicate that hydrothermal activity is very strong throughout the first half of Ceres' history, gradually weakening thereafter, but still active even today (Travis et al, 2015, 46 (super th) LPSC). Large-scale upwelling plumes of muddy water extend from the porous, permeable rocky core through an ocean layer and impinge on the bottom of the ice shell. These upwellings are very long-lasting. In addition, small scale, shorter-lived plumes frequently develop on the upper regions of the large plumes. The large-scale plumes occur at roughly +/- 25 degrees latitude. Recently, 3-D simulations of a sector of Ceres shows that the upwellings are indeed plumes and not sheets. In the 3-D model, plume diameters in the model are as small as 15-20 km in diameter, up to several 10s of km or more. Relating internal dynamics to surface features is challenging. Linkage to mounds seen on the surface may be possible. There appear to be two classes of mounds: Large domes (10s of km diameter) and small (<15 km diameter). Morphological evidence such as embayment relations imply that large mounds may be extrusive. The source of the small domes is less clear. They could be extrusive, or they could be pingo-like structures that form when large areas of melt are extruded or produced by impact, although they are larger than terrestrial or martian structures. Mound heights are typically no more than 1 - 5 km. One mechanism for generation of these mounds suggested by our modeling is extrusion of mud through fractures in the icy crust. Over-pressuring of upwelling plumes at the base of the icy crust from freezing of neighboring downwellings could generate fractures in a frozen mud crust. As plumes and icy crust cool, a significant volume expansion occurs due to freezing of water to ice. This pressurization is not uniform in space; the still-liquid upwellings will experience overpressure in our model that may be comparable to or greater than the tensile strength of ice and could create fractures, paths through which plume material could reach the surface. The over-pressure in hydrothermal plumes could be comparable to the overburden pressure at the base of multi-km mounds on the surface of Ceres. JF - American Geophysical Union Fall Meeting AU - Travis, Bryan J AU - Feldman, William C AU - Sizemore, Hanna G AU - O'Brien, David P AU - Sykes, Mark V AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P53E EP - 2192 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849299593?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Internal+convection+on+Ceres%3B+a+possible+explanation+for+dome+formation&rft.au=Travis%2C+Bryan+J%3BFeldman%2C+William+C%3BSizemore%2C+Hanna+G%3BO%27Brien%2C+David+P%3BSykes%2C+Mark+V%3BAnonymous&rft.aulast=Travis&rft.aufirst=Bryan&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Feldspars detected by ChemCam in Gale Crater with implications for future Martian exploration AN - 1849299572; 2016-105784 AB - Feldspar is a common igneous mineral that can shed light on parent magma temperatures, pressures, and compositions. During the first 801 sols of the NASA Mars Science Laboratory mission, we have detected 125 possible feldspar grains using the ChemCam LIBS instrument. We analyzed spectra from successive laser shots at the same location and approximate whole rock compositions for each target. Feldspar-containing targets range from tephrite-basanite to trachyandesite. The most common feldspar type is andesine; no targets are >An60. Over 30% are anorthoclase, and approximately 10% have potassium contents up to Or60. Individual shot measurements in a single spot suggest some feldspars are zoned. Most of these rocks are either float or incorporated into conglomerates, and thus we do not know their provenance. Many of the samples may originate from the Gale crater walls, indicative of Southern Highland ancient crust. Some may also be flung from further away (e.g., emplaced by impact processes). Hence, these rocks may give us a general clue to the variety of evolved igneous materials on Mars. The ubiquity of feldspars at Gale suggests that they have been significantly underestimated for the Southern Highlands, if not for the whole of Mars. For example, significant abundance of andesitic feldspars in both the southern highland and northern lowlands of Mars would imply that Martian volcanism has produced a greater extent of evolved igneous materials to a greater degree than previously thought. Remote sensing instruments are insensitive to plagioclase due to dust cover, lack of exposures, or low feldspar FeO content. However, the Mars 2020 rover will be equipped with 3 new instruments, the arm-mounted SHERLOC Raman, PIXL mu XRF, and the mast-mounted SuperCam combined Raman-LIBS instruments, which should help characterize Martian feldspars. Additionally, the SuperCam instrument plans to include three feldspars in its suite of 20+ onboard standards to improve feldspar chemical analysis. JF - American Geophysical Union Fall Meeting AU - Gasda, Patrick James AU - Carlson, Eric AU - Wiens, Roger C AU - Bridges, John AU - Sautter, Violaine AU - Cousin, Agnes AU - Maurice, Sylvestre AU - Gasnault, Olivier AU - Clegg, Samuel M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P51E EP - 06 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849299572?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Feldspars+detected+by+ChemCam+in+Gale+Crater+with+implications+for+future+Martian+exploration&rft.au=Gasda%2C+Patrick+James%3BCarlson%2C+Eric%3BWiens%2C+Roger+C%3BBridges%2C+John%3BSautter%2C+Violaine%3BCousin%2C+Agnes%3BMaurice%2C+Sylvestre%3BGasnault%2C+Olivier%3BClegg%2C+Samuel+M%3BAnonymous&rft.aulast=Gasda&rft.aufirst=Patrick&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - The SuperCam remote-sensing instrument suite for the Mars 2020 rover mission AN - 1849299523; 2016-105783 AB - The SuperCam remote-sensing instrument suite in development for the Mars 2020 rover represents a significant advance from its precursor, ChemCam, by adding Raman spectroscopy (to 12 m distance) and visible and near-infrared (VISIR) reflectance spectroscopy. For Raman spectroscopy the LIBS Nd:YAG laser is frequency-doubled to 532 nm (green Raman). A transmission spectrometer with an intensified CCD covers 150-4400 cm-1 spectral range at a resolution of 10 cm-1. The system is adjustably time-gated, removing much of the mineral fluorescence from the Raman spectra and also facilitating time-resolved fluorescence studies. The infrared range covers 1.3-2.6 microns in addition to the existing 400-840 nm range on ChemCam. Additional upgrades include doubling the LIBS resolution in the 535-860 nm range and adding color to the Remote Micro-Imager (RMI), which is the highest resolution remote imager on the rover. A large-scale effort is being applied to the on-board standards, being led by U. Valladolid in Spain, with targets contributed by many institutions. The number of geological targets will be increased from 8 (on ChemCam) to 22, planned to include end-member plagioclase feldspars, hi- and low-Ca pyroxene, olivines, several fine-grained basalts, hematite, jarosite, carbonates, apatite, and several synthetic targets doped with trace elements. Three Spectralon targets are planned for IR calibration and several color bands for the RMI. All but the Spectralon and color bands should be available for LIBS calibration, and many are also being designed for Raman and VISIR calibration. For LIBS this collection of standards will significantly improve the accuracy relative to ChemCam; other precision improvements are anticipated to come from correcting for variable plasma temperature. The presentation will illustrate how Mars datasets will be significantly improved via this multi-technique approach and will give a first look at prototype SuperCam spectra. JF - American Geophysical Union Fall Meeting AU - Wiens, Roger C AU - Maurice, Sylvestre AU - Clegg, Samuel M AU - Rull, Fernando AU - Sharma, Shiv K AU - Anderson, Ryan B AU - Beyssac, Olivier AU - Bonal, Lydie AU - DeFlores, Lauren P AU - Dromart, Gilles AU - Fischer, Woodward W AU - Forni, Olivier AU - Gasnault, Olivier AU - Grotzinger, John P AU - Johnson, Jeffrey Roy AU - Martinez-Frias, Jesus AU - Mangold, Nicolas AU - McLennan, Scott M AU - Montmessin, Franck AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P51E EP - 05 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849299523?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+SuperCam+remote-sensing+instrument+suite+for+the+Mars+2020+rover+mission&rft.au=Wiens%2C+Roger+C%3BMaurice%2C+Sylvestre%3BClegg%2C+Samuel+M%3BRull%2C+Fernando%3BSharma%2C+Shiv+K%3BAnderson%2C+Ryan+B%3BBeyssac%2C+Olivier%3BBonal%2C+Lydie%3BDeFlores%2C+Lauren+P%3BDromart%2C+Gilles%3BFischer%2C+Woodward+W%3BForni%2C+Olivier%3BGasnault%2C+Olivier%3BGrotzinger%2C+John+P%3BJohnson%2C+Jeffrey+Roy%3BMartinez-Frias%2C+Jesus%3BMangold%2C+Nicolas%3BMcLennan%2C+Scott+M%3BMontmessin%2C+Franck%3BAnonymous&rft.aulast=Wiens&rft.aufirst=Roger&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Nature and intensity of the 22-23 April 2015 eruptions of Volcan Calbuco, Chile, from satellite, lightning, and field observations AN - 1849299440; 2016-106207 AB - On 22 April 2015, Calbuco Volcano in southern Chile erupted for the first time in 43 years. The two primary phases of eruption, separated by a few hours, produced pyroclastic density currents, lahars, and spectacular vertical eruption columns that rose into the stratosphere. Clear weather conditions allowed the populated areas of Puerto Montt and Puerto Varas full view of the lightning-rich eruption, which was rapidly shared through social media. A wealth of remote-sensing data was also publically available in near real-time. We used this information to assess the eruption behavior by combining satellite-based umbrella growth rates, and the location and frequency of volcanic lightning. Umbrella expansion rates from GOES-13 satellite retrievals correspond to eruption rates of about 4X10 (super 6) kg s (super -1) for the first eruptive phase and 6X10 (super 6) kg s-1 for the second phase, following the approach of Pouget et al. (2013, JVGR, 258, 100-112). The location and timing of lightning flashes were obtained from the World Wide Lightning Location Network (WWLLN) Global Volcanic Lightning Monitor, which is updated approximately every minute (Ewert et al., 2010, Fall AGU Abstract AE31A-04). Interestingly, the onset of detected flashes was delayed by approximately 30 min after the start of each eruptive phase. Lighting provided a useful proxy for the waxing or waning intensity of the eruption, and helped identify the end of significant ash emissions. Using the 1-D volcanic plume model Plumeria, we have also simulated the vertical distribution of ash and ice in the plumes to examine potential causes of the extraordinary amount of volcanic lightning (1,094 flashes detected). Our analysis provides information on eruption timing, duration, and mass flow rate, which are necessary for ash dispersal modeling within hours of eruption. Results are also consistent with the field-based measurements of total erupted volume. We suggest that the combination of satellite-detected umbrella expansion rates with lightning data may provide a useful approach to constrain near real-time inputs for ash dispersal models and hazard warnings. JF - American Geophysical Union Fall Meeting AU - Van Eaton, Alexa R AU - Amigo, Alvaro AU - Bertin, Daniel AU - Mastin, Larry G AU - Giacosa, Raul AU - Behnke, Sonja A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V51E EP - 3080 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849299440?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Nature+and+intensity+of+the+22-23+April+2015+eruptions+of+Volcan+Calbuco%2C+Chile%2C+from+satellite%2C+lightning%2C+and+field+observations&rft.au=Van+Eaton%2C+Alexa+R%3BAmigo%2C+Alvaro%3BBertin%2C+Daniel%3BMastin%2C+Larry+G%3BGiacosa%2C+Raul%3BBehnke%2C+Sonja+A%3BAnonymous&rft.aulast=Van+Eaton&rft.aufirst=Alexa&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Chemistry of the materials above and below an unconformity between the Murray and Stimson Formations in Gale Crater, Mars AN - 1849298550; 2016-105896 AB - MSL began investigating a contact between Murray formation, (fine grained lake deposits) and the younger Stimson formation at Marias Pass in May 2015, on the lower slopes of Mt. Sharp. Images show that the Murray formation, with numerous calcium sulfate veins compared to the Stimson, is truncated at an erosional contact. MAHLI images show a white layer a few mm thick at the contact that might be calcium sulfate. The lowermost beds of the Stimson unit in the Missoula area comprise horizontally laminated or cross-laminated sandstones. The sandstones are poorly sorted with floating granules and very coarse sand grains set in a fine- medium-grained sand 'matrix'. This material directly above the contact is a resistant, basal ledge-forming layer that also forms numerous blocks of float on top of the eroded Murray. This basal layer contains light toned fragments, possibly calcium sulfate, eroded from the Murray. The poor sorting and presence of sub-angular grains, together with the absence of preferential sorting into size sorted layers would seem to rule out eolian processes for the lowermost beds of the Stimson and suggest fluvial processes were responsible for deposition of these beds. For chemostratigraphy, the distance of each ChemCam or APXS observation above or below the contact was determined from images and the NavCam stereo mesh. The top of the Murray near the Missoula area is variable in composition, and additional analyses are planned to determine if weathering occurred at the eroded surface. Above the contact, the lowest 2 cm of the resistant slab is higher in SiO (sub 2) , and lower in Al (sub 2) O (sub 3) , K (sub 2) O and Na (sub 2) O, relative to other Stimson analyses. In a few points with low totals, there is a correlation between Ca and missing components (presumed to be mostly S). These points could be connected to calcium sulfate in the form of cements and/or incorporation of eroded clasts of Murray vein materials. JF - American Geophysical Union Fall Meeting AU - Newsom, Horton E AU - Belgacem, Ines AU - Wiens, Roger C AU - Frydenvang, Jens AU - Gasnault, Olivier AU - Maurice, Sylvestre AU - Gasda, Patrick James AU - Clegg, Samuel M AU - Cousin, Agnes AU - Rapin, William AU - Jackson, Ryan AU - Vaci, Zoltan AU - Ha, Beth AU - Blaney, Diana L AU - Bridges, Nathan AU - Francis, Raymond AU - Payre, Valerie AU - Gupta, Sanjeev AU - Banham, Steven AU - Schroeder, Jeff AU - Calef, Fred J, III AU - Edgett, Kenneth S AU - Fey, Deirdra M AU - Fisk, Martin R AU - Gellert, Ralf AU - Thompson, Lucy M AU - Perrett, Glynis M AU - Grotzinger, John P AU - Rubin, David M AU - Williams, Amy AU - Kah, Linda C AU - Kronyak, Rachel Emily AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P53F EP - 06 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849298550?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Chemistry+of+the+materials+above+and+below+an+unconformity+between+the+Murray+and+Stimson+Formations+in+Gale+Crater%2C+Mars&rft.au=Newsom%2C+Horton+E%3BBelgacem%2C+Ines%3BWiens%2C+Roger+C%3BFrydenvang%2C+Jens%3BGasnault%2C+Olivier%3BMaurice%2C+Sylvestre%3BGasda%2C+Patrick+James%3BClegg%2C+Samuel+M%3BCousin%2C+Agnes%3BRapin%2C+William%3BJackson%2C+Ryan%3BVaci%2C+Zoltan%3BHa%2C+Beth%3BBlaney%2C+Diana+L%3BBridges%2C+Nathan%3BFrancis%2C+Raymond%3BPayre%2C+Valerie%3BGupta%2C+Sanjeev%3BBanham%2C+Steven%3BSchroeder%2C+Jeff%3BCalef%2C+Fred+J%2C+III%3BEdgett%2C+Kenneth+S%3BFey%2C+Deirdra+M%3BFisk%2C+Martin+R%3BGellert%2C+Ralf%3BThompson%2C+Lucy+M%3BPerrett%2C+Glynis+M%3BGrotzinger%2C+John+P%3BRubin%2C+David+M%3BWilliams%2C+Amy%3BKah%2C+Linda+C%3BKronyak%2C+Rachel+Emily%3BAnonymous&rft.aulast=Newsom&rft.aufirst=Horton&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Chemo-stratigraphy in the Murray Formation using ChemCam AN - 1849298548; 2016-105893 AB - Curiosity has completed a detailed chemo-stratigraphy analysis at the Pahrump exposure of the Murray formation. In total >570 chemical measurements and supporting remote micro images to classify texturally were collected. Chemical trends with both stratigraphic position and with texture were evaluated. From these data emerges a complex aqueous history where sediments have interacted with fluids with variable chemistry in distinct episodes. The ChemCam data collected at the nearby "Garden City" (GC) vein complex provides constraints on the chemical evolution of the Pahrump. GC is thought be stratigraphically above the Pahrump outcrop. Fluids producing the veins likely also migrated through the Pahrump sediments. Multiple episodes of fluids are evident at GC, forming distinct Ca sulfate, F-rich, enhanced MgO, and FeO-rich veins. These different fluid chemistries could be the result of distinct fluids migrating through the section from a distance with a pre-established chemical signature, fluids locally evolved from water rock interactions, or both. Texturally rocks have been classified into two distinct categories: fine grained or as cross-bedded sandstones. The sandstones have significantly lower SiO (sub 2) , Al (sub 2) O (sub 3) , and K (sub 2) O and higher FeO, and CaO. Fine grained rocks have further been sub-classified as resistant and recessive with other textural features such as laminations and pits noted. The strongest chemical trend in the fine-grained sandstones shows enhancements in MgO and FeO in erosion-resistant materials compared to fine grained recessive units, suggesting that increased abundance of Mg- and/or iron-rich cements may provide additional strength. The MgO and FeO variations with texture are independent of stratigraphic locations (e.g resistant material at both the bottom and top of the outcrop both are enhanced in MgO and FeO). The presence of the GC MgO and FeO rich veins provides additional evidence for fluids rich in these elements were present in the outcrop. Other elemental trends results including SiO (sub 2) , Al (sub 2) O (sub 3) , K (sub 2) O and Na (sub 2) O will be explored in addition to key trace element signatures such as Li, Cr and F to understand the chemical evolution of the outcrop. JF - American Geophysical Union Fall Meeting AU - Blaney, Diana L AU - Anderson, Ryan B AU - Bridges, Nathan AU - Bridges, John AU - Calef, Fred J, III AU - Clegg, Samuel M AU - Le Deit, Laetitia AU - Fisk, Martin R AU - Forni, Olivier AU - Gasnault, Olivier AU - Kah, Linda C AU - Kronyak, Rachel Emily AU - Lanza, Nina AU - Lasue, Jeremie AU - Mangold, Nicolas AU - Maurice, Sylvestre AU - Milliken, Ralph AU - Ming, Douglas W AU - Nachon, Marion AU - Newsom, Horton E AU - Rapin, William AU - Stack, Kathryn AU - Sumner, Dawn Y AU - Wiens, Roger C AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P53F EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849298548?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Chemo-stratigraphy+in+the+Murray+Formation+using+ChemCam&rft.au=Blaney%2C+Diana+L%3BAnderson%2C+Ryan+B%3BBridges%2C+Nathan%3BBridges%2C+John%3BCalef%2C+Fred+J%2C+III%3BClegg%2C+Samuel+M%3BLe+Deit%2C+Laetitia%3BFisk%2C+Martin+R%3BForni%2C+Olivier%3BGasnault%2C+Olivier%3BKah%2C+Linda+C%3BKronyak%2C+Rachel+Emily%3BLanza%2C+Nina%3BLasue%2C+Jeremie%3BMangold%2C+Nicolas%3BMaurice%2C+Sylvestre%3BMilliken%2C+Ralph%3BMing%2C+Douglas+W%3BNachon%2C+Marion%3BNewsom%2C+Horton+E%3BRapin%2C+William%3BStack%2C+Kathryn%3BSumner%2C+Dawn+Y%3BWiens%2C+Roger+C%3BAnonymous&rft.aulast=Blaney&rft.aufirst=Diana&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integrated numerical models of metamorphism; linking the regional (km) and thin-section (cm) scales in space and time AN - 1844921015; 2016-103285 AB - Advances over the last decade in regional numerical models of metamorphism and models of mineral nucleation and growth at the hand specimen scale allow quantitative estimates of how metamorphism behaves at the kilometer (km) and centimeter (cm) scale in both time and space. Integration of these two methodologies provides a holistic approach that allows predictions of km-scale regional thermal models to be linked to cm-scale hand specimen textures throughout the spatial domain and over the duration of a metamorphic event. To illustrate this concept, models of conductive and advective transport of heat around intrusions in the middle crust display the complex variation of thermal fields at the km scale in space and time for regional-contact metamorphic terranes. The results of these regional scale calculations show that rocks in different locations that have reached the same peak conditions (T (sub max) ,P (sub Tmax) ) attained T (sub max) , P (sub Tmax) at different times (t (sub Tmax) ) during the metamorphic event, cross key pelitic isograds at different times (t (sub Grt in) , t (sub St in) , t (sub Al-sil in) ) and have different rates of reaction overstepping when an isograd is crossed (dDelta G (sub rxn Grt in) /dt, dDelta G (sub rxn St in) /dt, dDelta G (sub rxn Al-sil in) /dt). The variation in these parameters in the 3-D spatial domain around the intrusion causes index minerals to have different nucleation and growth histories depending on their location. Linking the evolution of metamorphic textures to the specific local P-T-t path from the regional thermal models using a local equilibrium, diffusion-controlled nucleation/mineral growth model allows simulation of the evolution of rock textures at various locations as metamorphism progresses. The results of the textural modelling demonstrate that there are subtle differences in crystal size distributions and other textural features in metamorphic rocks that allow a careful petrologist to distinguish their different thermal histories, even though traditional methods using thermobarometry or pseudosections would imply thermal histories were all the same. JF - American Geophysical Union Fall Meeting AU - Dutrow, Barbara L AU - Foster, Charles T AU - Gable, Carl W AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V34A EP - 04 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1844921015?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Integrated+numerical+models+of+metamorphism%3B+linking+the+regional+%28km%29+and+thin-section+%28cm%29+scales+in+space+and+time&rft.au=Dutrow%2C+Barbara+L%3BFoster%2C+Charles+T%3BGable%2C+Carl+W%3BAnonymous&rft.aulast=Dutrow&rft.aufirst=Barbara&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Applications of cosmic ray muon radiography AN - 1840622114; 2016-096067 AB - The Dome of Santa Maria del Fiore, Florence Cathedral, was built between 1420 and 1436 by architect Filippo Brunelleschi and it is now cracking under its own weight. Engineering efforts are underway to model the dome's structure and reinforce it against further deterioration. According to some scholars, Brunelleschi might have built reinforcement structures into the dome itself; however, the only confirmed known subsurface reinforcement is a chain of iron and stone around the dome's base. Tomography with cosmic ray muons is a non-destructive imaging method that can be used to image the interior of the wall and therefore ascertain the layout and status of any iron substructure in the dome. We will show the results from a muon tomography measurement of iron hidden in a mockup of the dome's wall performed at Los Alamos National Lab in 2015. The sensitivity of this technique, and the status of this project will be also discussed. At last, we will show results on muon attenuation radiography of larger shallow targets. JF - American Geophysical Union Fall Meeting AU - Guardincerri, Elena AU - Durham, J Matthew AU - Morris, Christopher L AU - Rowe, Charlotte A AU - Poulson, Daniel C AU - Bacon, Jeffrey D AU - Plaud-Ramos, Kenie AU - Morley, Deborah J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NS21B EP - 1923 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840622114?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Applications+of+cosmic+ray+muon+radiography&rft.au=Guardincerri%2C+Elena%3BDurham%2C+J+Matthew%3BMorris%2C+Christopher+L%3BRowe%2C+Charlotte+A%3BPoulson%2C+Daniel+C%3BBacon%2C+Jeffrey+D%3BPlaud-Ramos%2C+Kenie%3BMorley%2C+Deborah+J%3BAnonymous&rft.aulast=Guardincerri&rft.aufirst=Elena&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Nominal height-of-burst for a near-Earth asteroid; profiles of radiation-deposition and change-in-velocity AN - 1840621731; 2016-095974 AB - In this work we profile the radiation deposition, and the velocity change, for a hazardous near-earth asteroid using a stand-off radiation source delivered at various heights-of-burst. For the radiation deposition, we compare results from analytic calculations, a particle transport code, and an adaptive-mesh radiation-hydrodynamic code; the change in velocity is computed using an adaptive-mesh radiation-hydrodynamic code. The nominal heights-of-burst will be compared, and applied to the potential deflection of the asteroid 101955 Bennu. JF - American Geophysical Union Fall Meeting AU - Ferguson, J AU - Gisler, G R AU - Plesko, C S AU - Weaver, R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH14B EP - 08 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621731?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Nominal+height-of-burst+for+a+near-Earth+asteroid%3B+profiles+of+radiation-deposition+and+change-in-velocity&rft.au=Ferguson%2C+J%3BGisler%2C+G+R%3BPlesko%2C+C+S%3BWeaver%2C+R%3BAnonymous&rft.aulast=Ferguson&rft.aufirst=J&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Cosmic ray scattering radiography AN - 1840621262; 2016-096065 AB - Cosmic ray muons are ubiquitous, are highly penetrating, and can be used to measure material densities by either measuring the stopping rate or by measuring the scattering of transmitted muons. The Los Alamos team has studied scattering radiography for a number of applications. Some results will be shown of scattering imaging for a range of practical applications, and estimates will be made of the utility of scattering radiography for nondestructive assessments of large structures and for geological surveying. Results of imaging the core of the Toshiba Nuclear Critical Assembly (NCA) Reactor in Kawasaki, Japan and simulations of imaging the damaged cores of the Fukushima nuclear reactors will be presented. Below is an image made using muons of a core configuration for the NCA reactor. JF - American Geophysical Union Fall Meeting AU - Morris, Christopher L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NS21B EP - 1920 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621262?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Cosmic+ray+scattering+radiography&rft.au=Morris%2C+Christopher+L%3BAnonymous&rft.aulast=Morris&rft.aufirst=Christopher&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - The high resolution topographic evolution of an active retrogressive thaw slump compiled from a decade of photography, ground surveys, laser scans and satellite imagery AN - 1840620443; 2016-095935 AB - Remote sensing imagery has enables the temporal reconstruction of thermal erosion features including lakes, shorelines and hillslope failures in remote Arctic locations, yet these planar data limit analysis to lines and areas. This study explores the application of varying techniques to reconstruct the three dimensional evolution of a single thermal erosion feature using a mixture of opportunistic oblique photos, ground surveys and satellite imagery. At the Selawik River retrogressive thaw slump in northwest Alaska, a bush plane collected oblique aerial photos when the feature was first discovered in 2004 and in subsequent years. These images were recently processed via Structure from Motion to generate georeferenced point clouds for the years prior to the initiation of our research. High resolution ground surveys in 2007, 2009 and 2010 were completed using robotic total station. Terrestrial laser scans (TLS) were collected in the summers of 2011 and 2012. Analysis of stereo satellite imagery from 2012 and 2015 enable continued monitoring of the feature after ground campaigns ended. As accurate coregistraion between point clouds is vital to topographic change detection, all prior and subsequent datasets were georeferenced to stable features observed in the 2012 TLS scan. Though this coregistration introduces uncertainty into each image, the magnitudes of uncertainty are significantly smaller than the topographic changes detected. Upslope retreat of the slump headwall generally decreases over time as the slump floor progresses from a highly dissected gully topography to a low relief, earthflow dominated depositional plane. The decreasing slope of the slump floor diminishes transport capacity, resulting in the progressive burial of the slump headwall, thus decreasing headwall retreat rates. This self-regulation of slump size based on feature relief and transport capacity suggests a capacity to predict the maximum size a given feature can expand to before stabilization. JF - American Geophysical Union Fall Meeting AU - Crosby, Benjamin T AU - Barnhart, Theodore B AU - Rowland, Joel C AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract EP54B EP - 05 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840620443?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+high+resolution+topographic+evolution+of+an+active+retrogressive+thaw+slump+compiled+from+a+decade+of+photography%2C+ground+surveys%2C+laser+scans+and+satellite+imagery&rft.au=Crosby%2C+Benjamin+T%3BBarnhart%2C+Theodore+B%3BRowland%2C+Joel+C%3BAnonymous&rft.aulast=Crosby&rft.aufirst=Benjamin&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Joint tomographic imaging of 3-D density structure using cosmic ray muons and high-precision gravity data AN - 1840620336; 2016-096072 AB - As part of the CO2 reservoir muon imaging project headed by the Pacific Northwest National Laboratory (PNNL) under the U.S. Department of Energy Subsurface Technology and Engineering Research, Development, and Demonstration (SubTER) iniative, Los Alamos National Laboratory (LANL) and the University of New Mexico (UNM) plan to leverage the recently decommissioned and easily accessible Tunnel Vault on LANL property to test the complementary modeling strengths of muon radiography and high-precision gravity surveys. This tunnel extends roughly 300 feet into the hillside, with a maximum depth below the surface of approximately 300 feet. We will deploy LANL's Mini Muon Tracker (MMT), a detector consisting of 576 drift tubes arranged in alternating parallel planes of orthogonally oriented tubes. This detector is capable of precise determination of trajectories for incoming muons with angular resolution of a few milliradians. We will deploy the MMT at several locations within the tunnel, to obtain numerous crossing muon trajectories and permit a 3D tomographic image of the overburden to be built. In the same project, UNM will use a Scintrex digital gravimeter to collect high-precision gravity data from a dense grid on the hill slope above the tunnel as well as within the tunnel itself. This will provide both direct and differential gravity readings for density modeling of the overburden. By leveraging detailed geologic knowledge of the canyon and the lithology overlying the tunnel, as well as the structural elements, elevations and blueprints of the tunnel itself, we will evaluate the muon and gravity data both independently and in a simultaneous, joint inversion to build a combined 3D density model of the overburden. JF - American Geophysical Union Fall Meeting AU - Rowe, Charlotte A AU - Guardincerri, Elena AU - Roy, Mousumi AU - Dichter, Michal AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NS21B EP - 1928 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840620336?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Joint+tomographic+imaging+of+3-D+density+structure+using+cosmic+ray+muons+and+high-precision+gravity+data&rft.au=Rowe%2C+Charlotte+A%3BGuardincerri%2C+Elena%3BRoy%2C+Mousumi%3BDichter%2C+Michal%3BAnonymous&rft.aulast=Rowe&rft.aufirst=Charlotte&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Spatial features of hydraulic conductivity in alluvial fans AN - 1840619825; 2016-096133 AB - Alluvial fans are highly heterogeneous due to the complicated depositional processes, which make it difficult to characterize the spatial distributions of the hydraulic conductivity and to evaluate the evolution trends. This study develops a methodology to identify the spatial statistical parameters (mean, variance, correlation range) of the hydraulic conductivity by using the hydraulic and geophysical data. The Chaobai River alluvial fan in the Beijing Plain, China, is used as an example to test the developed methodology for depicting the spatial variations of the alluvial fan. Due to the non-stationary property of the hydraulic conductivity distributions in the alluvial fan, a multi-zone parameterization approach is applied to analyze conductivity statistical properties of different hydrofacies and the composite variance of each zone is computed to describe the evolution of the conductivity along the flow direction of the alluvial fan. Results show that conductivity variances of medium-coarse sand and gravel decrease from Zone 1 to Zone 3 along the flow direction, which is consistent with the scales of the sedimentary transport energy. In the upper zone of the alluvial fan sediments were formed by higher-energy flooding, which induces bad sorting and larger conductivity variances in the sediments. The variance of fine sand also decreases from Zone 1 to Zone 3. The variances of the sub-clay and clay increase from the upper zone of the alluvial fan to the lower zone, where multiple layers of the sub-clay and clay formed by different flooding events have quite different conductivity distributions and statistical properties. With a much larger thickness in the lower zone, the vertical variations of conductivity contribute mainly to the relatively increased variance. The result of this study will provide insight for understanding conductivity heterogeneity and a method for characterizing the conductivity spatial distributions in alluvial fans. JF - American Geophysical Union Fall Meeting AU - Dai, Zhenxue AU - Zhu, Lin AU - Ke, Yinghai AU - Pan, Yun AU - Gong, Huili AU - Li, Yongyong AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NS51B EP - 05 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840619825?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Spatial+features+of+hydraulic+conductivity+in+alluvial+fans&rft.au=Dai%2C+Zhenxue%3BZhu%2C+Lin%3BKe%2C+Yinghai%3BPan%2C+Yun%3BGong%2C+Huili%3BLi%2C+Yongyong%3BAnonymous&rft.aulast=Dai&rft.aufirst=Zhenxue&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Contrasting two-dimensional and three-dimensional models of outcrop-to-outcrop hydrothermal circulation on the eastern flank of the Juan de Fuca Ridge AN - 1840617682; 2016-093807 AB - We present results from two-dimensional and three-dimensional coupled (fluid and heat flow) simulations of ridge-flank hydrothermal circulation on the eastern flank of the Juan de Fuca Ridge. Field studies in this region demonstrate the existence of an active hydrothermal siphon operating between two seamounts separated by approximately 50 km, and provide quantitative constraints that help to determine which simulations are successful in replicating known properties and processes. Constraints from field observations include (a) the flow rate between the outcrops, (b) the presence of secondary convection within the basement aquifer, leading to simultaneous recharge and discharge through a single outcrop (in additional to siphon flow between outcrops), (c) direct measurements of crustal permeability in basement boreholes, and (d) the lack of a regional seafloor heat flux anomaly as a consequence of outcrop-to-outcrop circulation. New simulations include an assessment of crustal permeability and thickness, outcrop permeability, and a comparison of simulation results using different geometries. Three-dimensional simulations are more consistent with field observations than their two-dimensional counterparts and indicate a crustal aquifer of < or =300 m thick having a bulk permeability between 3X10 (super -13) and 2X10 (super -12) m (super 2) , values consistent with borehole measurements. In addition, we find fluid flow rates and crustal cooling efficiencies that are an order of magnitude greater in three-dimensional simulations than inferred from two-dimensional simulations using equivalent properties. These results show that three-dimensional simulations of outcrop-to-outcrop hydrothermal circulation on a ridge flank improves the geological and geometric accuracy of results, in comparison to models run in two dimensions. JF - American Geophysical Union Fall Meeting AU - Fisher, Andrew T AU - Winslow, Dustin M AU - Stauffer, Phil H AU - Gable, Carl W AU - Zyvoloski, George A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract OS43A EP - 2018 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840617682?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Contrasting+two-dimensional+and+three-dimensional+models+of+outcrop-to-outcrop+hydrothermal+circulation+on+the+eastern+flank+of+the+Juan+de+Fuca+Ridge&rft.au=Fisher%2C+Andrew+T%3BWinslow%2C+Dustin+M%3BStauffer%2C+Phil+H%3BGable%2C+Carl+W%3BZyvoloski%2C+George+A%3BAnonymous&rft.aulast=Fisher&rft.aufirst=Andrew&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Robust representation of integrated surface-subsurface hydrology at watershed scales AN - 1840617651; 2016-093628 AB - A representation of integrated surface-subsurface hydrology is the central component to process-rich watershed models that are emerging as alternatives to traditional reduced complexity models. These physically based systems are important for assessing potential impacts of climate change and human activities on groundwater-dependent ecosystems and water supply and quality. Integrated surface-subsurface models typically couple three-dimensional solutions for variably saturated flow in the subsurface with the kinematic- or diffusion-wave equation for surface flows. The computational scheme for coupling the surface and subsurface systems is key to the robustness, computational performance, and ease-of-implementation of the integrated system. A new, robust approach for coupling the subsurface and surface systems is developed from the assumption that the vertical gradient in head is negligible at the surface. This tight-coupling assumption allows the surface flow system to be incorporated directly into the subsurface system; effects of surface flow and surface water accumulation are represented as modifications to the subsurface flow and accumulation terms but are not triggered until the subsurface pressure reaches a threshold value corresponding to the appearance of water on the surface. The new approach has been implemented in the highly parallel PFLOTRAN (www.pflotran.org) code. Several synthetic examples and three-dimensional examples from the Walker Branch Watershed in Oak Ridge TN demonstrate the utility and robustness of the new approach using unstructured computational meshes. Representation of solute transport in the new approach is also discussed. Notice: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for the United States Government purposes. JF - American Geophysical Union Fall Meeting AU - Painter, Scott L AU - Tang, Guoping AU - Collier, Nathan AU - Jan, Ahmad AU - Karra, Satish AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H21K EP - 06 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840617651?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Robust+representation+of+integrated+surface-subsurface+hydrology+at+watershed+scales&rft.au=Painter%2C+Scott+L%3BTang%2C+Guoping%3BCollier%2C+Nathan%3BJan%2C+Ahmad%3BKarra%2C+Satish%3BAnonymous&rft.aulast=Painter&rft.aufirst=Scott&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hydraulic conductivity estimates from particle size distributions of sediments from the Los Alamos chromium plume AN - 1832728720; 2016-089366 AB - Chromium used in Los Alamos National Laboratory cooling towers was released as effluent onto laboratory property between 1956 and 1972. As a result, the underlying regional aquifer is contaminated with chromium (VI), a toxin and carcinogen. The highest concentration of chromium is nearly equal 1 ppm in monitoring well R-42, exceeding the New Mexico drinking water standard of 50 ppb. The chromium plume is currently being investigated to identify an effective remediation method. Geologic heterogeneity within the aquifer causes the hydraulic conductivity within the plume to be spatially variable. This variability, particularly with depth, is crucial for predicting plume transport behavior. Though pump tests are useful for obtaining estimates of site specific hydraulic conductivity, they tend to interrogate hydraulic properties of only the most conductive strata. Variations in particle size distribution as a function of depth can complement pump test data by providing estimates of vertical variations in hydraulic conductivity. Samples were collected from five different sonically-drilled core holes within the chromium plume at depths ranging from 732'-1125' below the surface. To obtain particle size distributions, the samples were sieved into six different fractions from the fine sands to gravel range (>4 mm, 2-4 mm, 1.4-2 mm, 0.355-1.4 mm, 180-355 mu m, and smaller than 180 mu m). The Kozeny-Carmen equation (k=(delta g/mu )(dm (super 2) /180)(Phi (super 3) /(1-Phi ) (super 2) )), was used to estimate permeability from the particle size distribution data. Pump tests estimated a hydraulic conductivity varying between 1 and 50 feet per day. The Kozeny-Carmen equation narrowed this estimate down to an average value of 2.635 feet per day for the samples analyzed, with a range of 0.971 ft/day to 6.069 ft/day. The results of this study show that the Kozeny-Carmen equation provides quite specific estimates of hydraulic conductivity in the Los Alamos aquifer. More importantly, it provides pertinent information on the expected variations with depth in hydraulic conductivity not obtainable from pump tests. This information is a prerequisite for modeling the spatial variation of the chromium plume and formulate remediation strategies. JF - American Geophysical Union Fall Meeting AU - Harris, R AU - Reimus, P W AU - Ding, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H43F EP - 1582 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832728720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hydraulic+conductivity+estimates+from+particle+size+distributions+of+sediments+from+the+Los+Alamos+chromium+plume&rft.au=Harris%2C+R%3BReimus%2C+P+W%3BDing%2C+M%3BAnonymous&rft.aulast=Harris&rft.aufirst=R&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hydrocode model representations of asteroid 101955 bennu AN - 1832728714; 2016-089412 AB - 101955 Bennu is the intended target of the 2016 NASA OSIRIS-REx sample return mission. The current state of knowledge of the object is as good or better than what might be available for a potentially hazardous asteroid during the planning of a mitigation attempt. It is a 492-m-diameter B-type carbonaceous asteroid most similar in spectral features to CI and CM meteorites (Hergenrother et al. 203, 2014), with a ridged spheroidal shape that is known to a resolution of 25 m from Aricebo and Goldstone radar data. Bennu is a potentially hazardous asteroid, with an impact probability of 1:37000, and possible impact dates in the late 2100's, according to the JPL SENTRY database. Modeling a deflection attempt against a hypothetical Bennu-like asteroid is part of the NASA-NNSA inter-agency collaboration on impact hazard mitigation. Here we develop a best-estimate design reference model of Bennu based on the OSIRIS-REx DRA (Hergenrother et al. 2014) and available material models, identify uncertainties in the object's composition, and estimate their effects on mitigation planning. JF - American Geophysical Union Fall Meeting AU - Plesko, Catherine S AU - Ferguson, Jim M AU - Gisler, Galen R AU - Weaver, Robert AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH11A EP - 1898 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832728714?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hydrocode+model+representations+of+asteroid+101955+bennu&rft.au=Plesko%2C+Catherine+S%3BFerguson%2C+Jim+M%3BGisler%2C+Galen+R%3BWeaver%2C+Robert%3BAnonymous&rft.aulast=Plesko&rft.aufirst=Catherine&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Kinetic-impact asteroid defense; dependence on porosity and composition AN - 1832728683; 2016-089411 AB - In this work we study the deflection of hazardous near-earth asteroids using a kinetic impactor. The momentum delivered to the asteroid can be greater than the momentum of the impactor because of the reaction force produced by ablation from the impact crater. We use an adaptive-mesh hydrocode to study the momentum-enhancement factor, or beta, varying the assumptions regarding the equation of state, strength, and porosity of the target. Spall from the back side of the asteroid, which partly counters the favorable effect of ablation, is also included in the calculations. The efficiency is shown to be most strongly dependent on the asteroid's porosity, which unfortunately is the most difficult quantity to obtain via remote observations. This study is applied both to the proposed deflection of the 150-meter diameter moon of the binary asteroid 65803 Didymos by the AIDA/DART mission, and to the potential deflection of the 492-meter diameter asteroid 101955 Bennu, which has some possible Earth impacts late in the 22nd century, and is the target of the planned OSIRIS-Rex mission. Figures of merit from both these studies include the bulk momentum imparted to the asteroid and the degree to which the asteroid is disrupted. (LA-UR-15-26214) JF - American Geophysical Union Fall Meeting AU - Gisler, Galen R AU - Ferguson, Jim M AU - Plesko, Catherine S AU - Weaver, Robert AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH11A EP - 1897 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832728683?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Kinetic-impact+asteroid+defense%3B+dependence+on+porosity+and+composition&rft.au=Gisler%2C+Galen+R%3BFerguson%2C+Jim+M%3BPlesko%2C+Catherine+S%3BWeaver%2C+Robert%3BAnonymous&rft.aulast=Gisler&rft.aufirst=Galen&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Optimization of the leading penetrator for the HAIV/NIAC mission concept AN - 1832728635; 2016-089413 AB - The mitigation of potentially hazardous objects (PHOs) can be accomplished by a variety of methods including kinetic impactors, gravity tractors and several nuclear explosion options. Depending on the available lead time prior to Earth impact, non-nuclear options can be very effective at altering a PHO's orbit. However if the warning time is short nuclear options are generally deemed most effective at mitigating the hazard. The NAIC mission concept for a nuclear mission has been presented at several meetings, including the last PDC 2015. We use the adaptive mesh radiation-hydrocode RAGE [Gittings et al., Computational Science and Discovery, 1, 015005] to perform detailed simulations of this HAIV mission concept. We use the RAGE code to simulate the crater formation by the kinetic impactor as well as the explosion and energy coupling from the follower nuclear explosive device (NED) timed to detonate below the original surface to enhance the energy coupling. The RAGE code has been well validated for a wide variety of applications. In this study, we show how an improved "penetrator" shaped leader can greatly enhance the depth of burial of the following NED. In this work we have started to optimize the leading impactor into a penetrator that will create a much deeper crater into which the NED will explode. The more deeply buried NED will couple energy to the asteroid much more efficiently than a surface burst. Better coupling to the asteroid has several implications: 1) for smaller asteroids lower yield NEDs could be employed; or 2) for much larger asteroids this mission concept could provide an acceptable asteroid disruption with systems available today. References [1] Gittings, Weaver et al "The RAGE radiation-hydrodynamics Code," Comp. Sci. Disc. 1 (2008) 015005 November 21, 2008 JF - American Geophysical Union Fall Meeting AU - Weaver, Robert AU - Barbee, Brent AU - Wie, Bong AU - Zimmerman, Ben AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH11A EP - 1899 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832728635?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Optimization+of+the+leading+penetrator+for+the+HAIV%2FNIAC+mission+concept&rft.au=Weaver%2C+Robert%3BBarbee%2C+Brent%3BWie%2C+Bong%3BZimmerman%2C+Ben%3BAnonymous&rft.aulast=Weaver&rft.aufirst=Robert&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Sequential leaching of chromium contaminated sediments; a study characterizing natural attenuation AN - 1832728554; 2016-089374 AB - Natural attenuation is an important process in slowing down the transport of hexavalent chromium, Cr(VI), an anthropogenic environmental contaminant, either by adsorption of Cr(VI) to sediments, or by reduction to nontoxic trivalent chromium, Cr(III). The capacity and mechanism of attenuation is explored in this sequential leaching study of different particle size fractions of chromium contaminated sediments and similar uncontaminated sediments from the regional aquifer near Los Alamos, New Mexico. Using this leaching protocol each sediment sample is split in two: one half is leached three times using a 0.1 M sodium bicarbonate/carbonate solution, while the second half is leached three times using a 0.01 M nitric acid, followed by two consecutively increasing magnitudes of nitric acid concentrations. Based on the amphoteric nature of chromium, alkaline leaching is used to establish the amount of Cr(VI) sorbed on the sediment, whereas acid leaching is used to establish the amount of Cr(III). The weak acid is predicted to release the attenuated anthropogenic Cr(III), without affecting Cr-bearing minerals. The sequential, stronger, acid is anticipated to leach Cr(III)-incorporated in the minerals. The efficiency and validation of the sequential leaching method is assessed by comparing the leaching behavior of bentonite and biotite samples, with and without loaded Cr(VI). A 97% chromium mass balance of leached Cr(VI)-loaded bentonite and biotite proves the viability of this method for further use on leaching contaminated sediments. By comparing contaminated and uncontaminated sediment leachate results, of chromium and other major and trace elements, the signature of anthropogenic chromium is determined. Further mineralogical characterization of the sediments provides a quantitative measure of the natural attenuation capacity for chromium. Understanding these results is pertinent in delineating the optimal procedure for the remediation of Cr(VI) in the regional aquifer near Los Alamos. JF - American Geophysical Union Fall Meeting AU - Musa, D AU - Ding, M AU - Beroff, S AU - Rearick, M AU - Perkins, G AU - WoldeGabriel, G W AU - Ware, D AU - Harris, R AU - Kluk, E AU - Katzman, D AU - Reimus, P W AU - Heikoop, J M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H43F EP - 1590 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832728554?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Sequential+leaching+of+chromium+contaminated+sediments%3B+a+study+characterizing+natural+attenuation&rft.au=Musa%2C+D%3BDing%2C+M%3BBeroff%2C+S%3BRearick%2C+M%3BPerkins%2C+G%3BWoldeGabriel%2C+G+W%3BWare%2C+D%3BHarris%2C+R%3BKluk%2C+E%3BKatzman%2C+D%3BReimus%2C+P+W%3BHeikoop%2C+J+M%3BAnonymous&rft.aulast=Musa&rft.aufirst=D&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - A computationally efficient parallel Levenberg-Marquardt algorithm for large-scale big-data inversion AN - 1832723274; 2016-091989 AB - Inverse modeling seeks model parameters given a set of observed state variables. However, for many practical problems due to the facts that the observed data sets are often large and model parameters are often numerous, conventional methods for solving the inverse modeling can be computationally expensive. We have developed a new, computationally-efficient Levenberg-Marquardt method for solving large-scale inverse modeling. Levenberg-Marquardt methods require the solution of a dense linear system of equations which can be prohibitively expensive to compute for large-scale inverse problems. Our novel method projects the original large-scale linear problem down to a Krylov subspace, such that the dimensionality of the measurements can be significantly reduced. Furthermore, instead of solving the linear system for every Levenberg-Marquardt damping parameter, we store the Krylov subspace computed when solving the first damping parameter and recycle it for all the following damping parameters. The efficiency of our new inverse modeling algorithm is significantly improved by using these computational techniques. We apply this new inverse modeling method to invert for a random transitivity field. Our algorithm is fast enough to solve for the distributed model parameters (transitivity) at each computational node in the model domain. The inversion is also aided by the use regularization techniques. The algorithm is coded in Julia and implemented in the MADS computational framework (http://mads.lanl.gov). Julia is an advanced high-level scientific programming language that allows for efficient memory management and utilization of high-performance computational resources. By comparing with a Levenberg-Marquardt method using standard linear inversion techniques, our Levenberg-Marquardt method yields speed-up ratio of 15 in a multi-core computational environment and a speed-up ratio of 45 in a single-core computational environment. Therefore, our new inverse modeling method is a powerful tool for large-scale applications. JF - American Geophysical Union Fall Meeting AU - Lin, Y AU - O'Malley, D AU - Vesselinov, V V AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H41B EP - 1299 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832723274?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+computationally+efficient+parallel+Levenberg-Marquardt+algorithm+for+large-scale+big-data+inversion&rft.au=Lin%2C+Y%3BO%27Malley%2C+D%3BVesselinov%2C+V+V%3BAnonymous&rft.aulast=Lin&rft.aufirst=Y&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Actinide sorption in a brine/dolomite rock system: evaluating the degree of conservatism in K (sub d) ranges used in performance assessment modeling for the WIPP nuclear waste repository AN - 1828852425; 2016-086448 AB - The Waste Isolation Pilot Plant (WIPP) near Carlsbad, NM is the only operating nuclear waste repository in the US and has been accepting transuranic (TRU) waste since 1999. The WIPP is located in a salt deposit approximately 650 m below the surface and performance assessment (PA) modeling for a 10,000 year period is required to recertify the operating license with the US EPA every five years. The main pathway of concern for environmental release of radioactivity is a human intrusion caused by drilling into a pressurized brine reservoir below the repository. This could result in the flooding of the repository and subsequent transport in the high transmissivity layer (dolomite-rich Culebra formation) above the waste disposal rooms. We evaluate the degree of conservatism in the estimated sorption partition coefficients (Kds) ranges used in the PA based on an approach developed with granite rock and actinides (Dittrich and Reimus, 2015; Dittrich et al., 2015). Sorption onto the waste storage material (Fe drums) may also play a role in mobile actinide concentrations. We will present (1) a conceptual overview of how Kds are used in the PA model, (2) technical background of the evolution of the ranges and (3) results from batch and column experiments and model predictions for Kds with WIPP dolomite and clays, brine with various actinides, and ligands (e.g., acetate, citrate, EDTA) that could promote transport. The current Kd ranges used in performance models are based on oxidation state and are 5-400, 0.5-10,000, 0.03-200, and 0.03-20 mL g (super -1) for elements with oxidation states of III, IV, V, and VI, respectively. Based on redox conditions predicted in the brines, possible actinide species include Pu(III), Pu(IV), U(IV), U(VI), Np(IV), Np(V), Am(III), and Th(IV). We will also discuss the challenges of upscaling from lab experiments to field scale predictions, the role of colloids, and the effect of engineered barrier materials (e.g., MgO) on transport conditions. JF - American Geophysical Union Fall Meeting AU - Dittrich, Timothy M AU - Reed, Donald T AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51S EP - 04 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828852425?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Actinide+sorption+in+a+brine%2Fdolomite+rock+system%3A+evaluating+the+degree+of+conservatism+in+K+%28sub+d%29+ranges+used+in+performance+assessment+modeling+for+the+WIPP+nuclear+waste+repository&rft.au=Dittrich%2C+Timothy+M%3BReed%2C+Donald+T%3BAnonymous&rft.aulast=Dittrich&rft.aufirst=Timothy&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Applications of reduced order models for groundwater impacts due to leaking brine or carbon dioxide AN - 1828847099; 2016-086454 AB - The National Risk Assessment Partnership has developed a suite of reduced-order models (ROMs) that can be used to predict the impact of CO2 and brine leaks on overlying aquifers. The these computationally-efficient models are based on field-scale reactive transport simulations. The ROMs reproduce the ensemble behavior of large numbers of simulations very well and thus are well-suited to applications that consider a large number of scenarios such as sensitivity analysis, risk assessment, and uncertainty analysis. In this presentation, we seek to demonstrate applicability of ROM-based ensemble analysis. We consider two questions. First, what types of decisions could these analyses support? Second, what types of aquifers could these ROMs be applied to? Four examples are presented for applying these ROMs, in ensemble mode, to supporting decisions in the early stages in a hypothetical geologic CO (sub 2) sequestration project. These decisions pertain to site selection, site characterization, monitoring network evaluation, and health impacts. In all these cases, we consider potential brine/CO (sub 2) leak rates at the base of the aquifer to be uncertain. We show that derived probabilities provide information relevant to the decision at hand. Although the ROMs were developed using site-specific data from two aquifers (the High Plains, and the unconfined, carbonate portion of the Edwards), the models accept aquifer characteristics as variable inputs and so they may have more broad applicability. Of the nine water quality metrics the ROMs can predict (pH, TDS, 4 trace metals, 3 organic compounds) we conclude that pH and TDS predictions are the most transferable to other aquifers. Guidelines are presented for determining the aquifer types for which the ROMs should be applicable. JF - American Geophysical Union Fall Meeting AU - Bacon, Diana H AU - Keating, Elizabeth H AU - Carroll, Susan A AU - Mansoor, Kayyum AU - Sun, Yunwei AU - Zheng, Liange AU - Harp, Dylan R AU - Dai, Zhenzue AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51U EP - 01 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828847099?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Applications+of+reduced+order+models+for+groundwater+impacts+due+to+leaking+brine+or+carbon+dioxide&rft.au=Bacon%2C+Diana+H%3BKeating%2C+Elizabeth+H%3BCarroll%2C+Susan+A%3BMansoor%2C+Kayyum%3BSun%2C+Yunwei%3BZheng%2C+Liange%3BHarp%2C+Dylan+R%3BDai%2C+Zhenzue%3BAnonymous&rft.aulast=Bacon&rft.aufirst=Diana&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterization of anomalous contaminant transport via push-pull tracer tests AN - 1828847030; 2016-086447 AB - Push-pull (single-well-injection-withdrawal) tracer tests are widely used as an economical means of characterizing field-scale solute transport properties such as sorption and dispersion. Typically, these are analyzed by means of analytic solutions that assume transport obeys the radial advection-dispersion equation. We revisit this approach as: (1) Recognition of the ubiquity of anomalous transport and its impact on contaminant remediation necessitates the use of new methods to characterize it, and (2) Improved computational power and numerical methods have rendered reliance on analytical solutions obsolete. Here, we present a technique for characterizing diffusion-driven anomalous transport (i.e., anomalous transport driven by a "trapping" process whose trapping and release statistics are independent of the groundwater flow velocity). Examples include diffusion into low permeability zones, kinetic sorption, and matrix diffusion. Using field observations, we simultaneously calibrate an exponential probability distribution for time spent on a single sojourn in the mobile domain and a truncated power law probability distribution for time spent on a single sojourn in the immobile domain via a stochastic global optimization technique. The calibrated distributions, being independent of the flow regime, are applicable to the same domain under any flow conditions, including linear flow. In the context of the continuous time random walk (CTRW), one may simply define a transition to represent a single trap-and-release cycle, and directly compute the spatiotemporal transition distribution that defines the CTRW from the two calibrated distributions and the local seepage velocity (so that existing CTRW transport theory applies). A test of our methodology against a push-pull test from the MADE site demonstrated fitting performance comparable to that of a 3-D MODFLOW/MT3DMS model with a variety of hydraulic conductivity zones and explicit treatment of mobile-immobile mass transfer. In particular, our model captured the heavy tail portion of the breakthrough curve nearly perfectly. Use of the technique for characterization of dual porosity media and uncertainty analysis at a major remediation site at LANL will also be discussed. JF - American Geophysical Union Fall Meeting AU - Hansen, Scott K AU - Vesselinov, Velimir V AU - Berkowitz, Brian AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51S EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828847030?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterization+of+anomalous+contaminant+transport+via+push-pull+tracer+tests&rft.au=Hansen%2C+Scott+K%3BVesselinov%2C+Velimir+V%3BBerkowitz%2C+Brian%3BAnonymous&rft.aulast=Hansen&rft.aufirst=Scott&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Risk assessment and monitoring techniques for geological CO (sub 2) sequestration AN - 1828846872; 2016-086456 AB - The National Risk Assessment Partnership (NRAP) has developed an integrated assessment model (NRAP-IAM-CS) of a carbon storage system that is able to model the full subsurface system from the reservoir to groundwater aquifers and release into the atmosphere. The approach taken uses reduced order models so that systems simulations occur rapidly, even for simulations times of hundreds to thousands of years. In that way, uncertainties of the entire system can be probed in a reasonable time period, using a Monte Carlo approach. The model presented here uses third generation NRAP ROMs that are able to realistically represent several key properties of reservoirs, wells, seals, and groundwater aquifers. Results from the NRAP-IAM-CS model are used to quantify risk profiles for selected parameter distributions of reservoir properties, seal properties, numbers of wells, well properties, thief zones, and groundwater aquifer properties. A series of risk profiles show how the risk under different storage conditions evolves over time, both during injection, in the near-term post injection period, and over the long term. In this study, the NRAP-IAM-CS was also used to investigate the importance of different parameters across the system on risk of leakage and risk of groundwater contamination, under different storage conditions. JF - American Geophysical Union Fall Meeting AU - Pawar, Rajesh AU - Dilmore, Robert M AU - Bromhal, Grant S AU - Guthrie, George D, Jr AU - Stauffer, Phil H AU - Chu, Shaoping AU - Oldenburg, Curtis M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51U EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846872?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Risk+assessment+and+monitoring+techniques+for+geological+CO+%28sub+2%29+sequestration&rft.au=Pawar%2C+Rajesh%3BDilmore%2C+Robert+M%3BBromhal%2C+Grant+S%3BGuthrie%2C+George+D%2C+Jr%3BStauffer%2C+Phil+H%3BChu%2C+Shaoping%3BOldenburg%2C+Curtis+M%3BAnonymous&rft.aulast=Pawar&rft.aufirst=Rajesh&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - A record of uranium-series transport in fractured, unsaturated tuff at Nopal I, Sierra Pena Blanca, Chihuahua, Mexico AN - 1828846783; 2016-086373 AB - In this study we utilize U-series disequilibria measurements to investigate mineral fluid interactions and the role fractures play in the geochemical evolution of an analogue for a high level nuclear waste repository, the Nopal I uranium ore deposit. Samples of fracture-fill materials have been collected from a vertical drill core and surface fractures. High uranium concentrations in these materials (12-7700 ppm) indicate U mobility and transport from the deposit in the past. U concentrations generally decrease with horizontal distance away from the ore deposit but show no trend with depth. Isotopic activity ratios indicate a complicated geochemical evolution in terms of the timing and extent of actinide mobility, possibly due to changing environmental (redox) conditions over the history of the deposit. (super 234) U/ (super 238) U activity ratios are generally distinct from secular equilibrium and indicate some degree of open system U behavior during the past 1.2 Ma. However, calculated closed system (super 238) U- (super 234) U- (super 230) Th model ages are generally >313 ka and >183 ka for the surface fracture and drill core samples respectively, suggesting closed system behavior for U and Th over this most recent time period. Whole rock isochrons drawn for the drill core samples show that at two of three depths fractures have remained closed with respect to U and Th mobility for >200 ka. However, open system behavior for U in the last 350 ka is suggested at 67 m depth. (super 231) Pa/ (super 235) U activity ratios within error of unity suggest closed system behavior for U and Pa for at least the past 185 ka. (super 226) Ra/ (super 230) Th activity ratios are typically <1 (0.7-1.2), suggesting recent (<8 ka) radium loss and mobility due to ongoing fluid flow in the fractures. Overall, the mainly closed system behavior of U-Th-Pa over the past nearly equal 200 ka provides one indicator of the geochemical immobility of these actinides over long time-scales for potential nuclear waste repositories sited in fractured, unsaturated tuff. JF - American Geophysical Union Fall Meeting AU - Denton, J AU - Goldstein, S J AU - Paviet, Patricia AU - Nunn, A J AU - Amato, R S AU - Hinrichs, K A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H31I EP - 1545 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846783?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+record+of+uranium-series+transport+in+fractured%2C+unsaturated+tuff+at+Nopal+I%2C+Sierra+Pena+Blanca%2C+Chihuahua%2C+Mexico&rft.au=Denton%2C+J%3BGoldstein%2C+S+J%3BPaviet%2C+Patricia%3BNunn%2C+A+J%3BAmato%2C+R+S%3BHinrichs%2C+K+A%3BAnonymous&rft.aulast=Denton&rft.aufirst=J&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - A metal stable isotope approach to understanding uranium mobility across roll front redox boundaries AN - 1828846709; 2016-086370 AB - Sedimentary roll-front uranium (U) ore deposits are the principal source of U for nuclear fuel in the USA and an important part of the current all-of-the-above energy strategy. Mining of roll-front U ore in the USA is primarily by in situ alkaline oxidative dissolution of U minerals. There are significant environmental benefits to in situ mining including no mine tailings or radioactive dust, however, the long-term immobilization of U in the aquifer after the completion of mining remains uncertain. We have utilized the metal stable isotopes U, Se and Mo in groundwater from roll-front mines in Texas and Wyoming to quantify the aquifer redox conditions and predict the onset of U reduction after post mining aquifer restoration. Supporting information from the geochemistry of groundwater and aquifer sediments are used to understand the transport of U prior to and after in situ mining. Groundwater was collected across 4 mining units at the Rosita mine in the Texas coastal plain and 2 mining units at the Smith Ranch mine in the Powder River Basin, Wyoming. In general, the sampled waters are moderately reducing and ore zone wells contain the highest aqueous U concentrations. The lowest U concentrations occur in monitoring wells downgradient of the ore zone. (super 238) U/ (super 235) U is lowest in downgradient wells and is correlated with aqueous U concentrations. Rayleigh distillation models of the (super 238) U/ (super 235) U are consistent with U isotope fractionation factors of 1.0004-1.001, similar to lab-based studies. Based on these results we conclude that redox reactions continue to affect U distribution in the ore zone and downgradient regions. We also measured aqueous selenium isotope (delta (super 82) Se) and molybdenum isotope (delta (super 98) Mo) compositions in the Rosita groundwater. Se(VI) primarily occurs in the upgradient wells and is absent in most ore zone and downgradient wells. Rayleigh distillation models suggest reduction of Se(VI) along the groundwater flow path and when superimposed on the U isotope data Se reduction is favored over U reduction. The delta (super 98) Mo of Rosita groundwater is significantly elevated compared to the U ore and is negatively correlated with the groundwater Eh, which suggests localized strong reducing conditions capable of Mo reduction. Ongoing work will determine the Mo isotope systematics of U ores and groundwater from roll-front deposits. JF - American Geophysical Union Fall Meeting AU - Brown, S T AU - Basu, A AU - Christensen, J N AU - DePaolo, D J AU - Heikoop, J M AU - Reimus, P W AU - Maher, K AU - Weaver, K L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H31I EP - 1542 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846709?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+metal+stable+isotope+approach+to+understanding+uranium+mobility+across+roll+front+redox+boundaries&rft.au=Brown%2C+S+T%3BBasu%2C+A%3BChristensen%2C+J+N%3BDePaolo%2C+D+J%3BHeikoop%2C+J+M%3BReimus%2C+P+W%3BMaher%2C+K%3BWeaver%2C+K+L%3BAnonymous&rft.aulast=Brown&rft.aufirst=S&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Field testing of downgradient uranium mobility at an in-situ recovery uranium mine AN - 1828846638; 2016-086368 AB - In-situ recovery (ISR) mining of uranium involves the injection of O (sub 2) and CO (sub 2) (or NaHCO (sub 3) ) into saturated roll-front deposits to oxidize and solubilize the uranium, which is then removed by ion exchange at the surface and processed into U (sub 3) O (sub 8) . While ISR is economical and environmentally-friendly relative to conventional mining, one of the challenges of extracting uranium by this process is that it leaves behind a geochemically-altered aquifer that is exceedingly difficult to restore to pre-mining geochemical conditions, a regulatory objective. In this research, we evaluated the ability of the aquifer downgradient of an ISR mining area to attenuate the transport of uranium and other problem constituents that are mobilized by the mining process. Such an evaluation can help inform both regulators and the mining industry as to how much restoration of the mined ore zone is necessary to achieve regulatory compliance at various distances downgradient of the mining zone even if complete restoration of the ore zone proves to be difficult or impossible. Three single-well push-pull tests and one cross-well test were conducted in which water from an unrestored, previously-mined ore zone was injected into an unmined ore zone that served as a geochemical proxy for the downgradient aquifer. In all tests, non-reactive tracers were injected with the previously-mined ore zone water to allow the transport of uranium and other constituents to be compared to that of the nonreactive species. In the single-well tests, it was shown that the recovery of uranium relative to the nonreactive tracers ranged from 12-25%, suggesting significant attenuation capacity of the aquifer. In the cross-well test, selenate, molybdate and metavanadate were injected with the unrestored water to provide information on the transport of these potentially-problematic anionic constituents. In addition to the species-specific transport information, this test provided valuable constraints on redox conditions within the system, as redox couples involving these species collectively bracket the predicted transition redox potential for the U(VI)/U(IV) couple. Reduction should provide much longer-lasting immobilization of constituents than adsorption, especially given the inherent reducing characteristics of roll-front systems. JF - American Geophysical Union Fall Meeting AU - Reimus, P W AU - Clay, James T AU - Rearick, M AU - Perkins, G AU - Brown, S T AU - Basu, A AU - Chamberlain, K AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H31I EP - 1540 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846638?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Field+testing+of+downgradient+uranium+mobility+at+an+in-situ+recovery+uranium+mine&rft.au=Reimus%2C+P+W%3BClay%2C+James+T%3BRearick%2C+M%3BPerkins%2C+G%3BBrown%2C+S+T%3BBasu%2C+A%3BChamberlain%2C+K%3BAnonymous&rft.aulast=Reimus&rft.aufirst=P&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - A multi-scale approach for CO (sub 2) accounting and risk analysis in CO (sub 2) enhanced oil recovery sites AN - 1828846202; 2016-086455 AB - Using carbon dioxide in enhanced oil recovery (CO (sub 2) -EOR) is a promising technology for emissions management because CO (sub 2) -EOR can dramatically reduce carbon sequestration costs in the absence of greenhouse gas emissions policies that include incentives for carbon capture and storage. This study develops a multi-scale approach to perform CO (sub 2) accounting and risk analysis for understanding CO (sub 2) storage potential within an EOR environment at the Farnsworth Unit of the Anadarko Basin in northern Texas. A set of geostatistical-based Monte Carlo simulations of CO (sub 2) -oil-water flow and transport in the Marrow formation are conducted for global sensitivity and statistical analysis of the major risk metrics: CO (sub 2) injection rate, CO (sub 2) first breakthrough time, CO (sub 2) production rate, cumulative net CO (sub 2) storage, cumulative oil and CH (sub 4) production, and water injection and production rates. A global sensitivity analysis indicates that reservoir permeability, porosity, and thickness are the major intrinsic reservoir parameters that control net CO (sub 2) injection/storage and oil/CH (sub 4) recovery rates. The well spacing (the distance between the injection and production wells) and the sequence of alternating CO (sub 2) and water injection are the major operational parameters for designing an effective five-spot CO (sub 2) -EOR pattern. The response surface analysis shows that net CO (sub 2) injection rate increases with the increasing reservoir thickness, permeability, and porosity. The oil/CH (sub 4) production rates are positively correlated to reservoir permeability, porosity and thickness, but negatively correlated to the initial water saturation. The mean and confidence intervals are estimated for quantifying the uncertainty ranges of the risk metrics. The results from this study provide useful insights for understanding the CO (sub 2) storage potential and the corresponding risks of commercial-scale CO (sub 2) -EOR fields. JF - American Geophysical Union Fall Meeting AU - Dai, Zhenxue AU - Viswanathan, Hari Selvi AU - Middleton, Richard Stephen AU - Pan, Feng AU - Ampomah, William AU - Yang, Changbing AU - Jia, Wei AU - Lee, Si-Yong AU - McPherson, Brian J O L AU - Grigg, Reid AU - White, Mark D AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51U EP - 02 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846202?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+multi-scale+approach+for+CO+%28sub+2%29+accounting+and+risk+analysis+in+CO+%28sub+2%29+enhanced+oil+recovery+sites&rft.au=Dai%2C+Zhenxue%3BViswanathan%2C+Hari+Selvi%3BMiddleton%2C+Richard+Stephen%3BPan%2C+Feng%3BAmpomah%2C+William%3BYang%2C+Changbing%3BJia%2C+Wei%3BLee%2C+Si-Yong%3BMcPherson%2C+Brian+J+O+L%3BGrigg%2C+Reid%3BWhite%2C+Mark+D%3BAnonymous&rft.aulast=Dai&rft.aufirst=Zhenxue&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterization of U ore from a roll-front U deposit; implications of dominant U-Ti mineral for ore genesis and post solution-mining U immobilization AN - 1828845545; 2016-086369 AB - Reductive immobilization of dissolved U(VI) is an important process that gives rise to roll-front U deposits as well as offers a remediation strategy after in situ recovery (ISR) mining of roll-fronts by oxidative dissolution of the U ore. About 25% of the global and over 90% of all U resources in the United States consist of roll-front deposits. Accordingly, nearly equal 50% of global U mining and almost all current U mining in the United States is ISR mining. Therefore, it is important to identify the U immobilization pathways for an improved understanding of the U ore genesis and postmining U(VI) remediation. Here, we characterize (XRD, XRF, SEM/EDS, QEMSCAN) the U ore from a roll-front U deposit and sediments downgradient of the ore from an ISR site at Rosita, TX, USA. The dominant U mineral in Rosita U ore is brannerite (nominally U (super 4) +Ti (sub 2) O (sub 6) , up to 0.032 wt%), followed by coffinite and U-oxides. The U mineralized sand is composed of quartz (41-53%), calcite (15-30%), plagioclase (11-19%), microcline (2-9%), clinoptilolite (0.5-7%) with minor amounts of pyrite/marcasite (2-7%) and clays/micas (1-4%), and very little organic C (<0.1%). Ore zone samples contain minor amounts (<2%) of hematite, V-oxides/V-Ti-Fe-oxides and sulfidized Fe-Ti oxides with variable Fe, Ti and S ratios locally hosting low levels of U. The dominant sulfide mineral is marcasite. We observe a complex relationship between U-Ti minerals and sulfide/silicate phases where U minerals occur as inclusions, irregularly developed veins or intergrowths. Except for the U concentrations, the downgradient sediments are compositionally similar to the ore and contain abundant smectite/illite (7-45%). The predominance of brannerite implies direct reduction of U(VI) on surfaces of reduced Fe-Ti oxides as a major ore-forming mechanism. Our results reveal an as yet unidentified mechanism of ore genesis that differs from the current model that presupposes the sulfidized Fe-Ti oxides as the main reductant of U(VI). Furthermore, previous research demonstrated formation of U-Ti phases structurally similar to brannerite during reduction of U(VI) by titanomagnetites. Abundant Fe-Ti oxides in the downgradient sediments suggest that the interaction between postmining residual U(VI) and Fe-Ti oxides may play a major role in natural remediation of U at Rosita and similar ISR sites. JF - American Geophysical Union Fall Meeting AU - Brown, S T AU - Basu, A AU - Christensen, J N AU - Reimus, P W AU - Heikoop, J M AU - WoldeGabriel, G W AU - Hartmann, M AU - DePaolo, D J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H31I EP - 1541 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828845545?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterization+of+U+ore+from+a+roll-front+U+deposit%3B+implications+of+dominant+U-Ti+mineral+for+ore+genesis+and+post+solution-mining+U+immobilization&rft.au=Brown%2C+S+T%3BBasu%2C+A%3BChristensen%2C+J+N%3BReimus%2C+P+W%3BHeikoop%2C+J+M%3BWoldeGabriel%2C+G+W%3BHartmann%2C+M%3BDePaolo%2C+D+J%3BAnonymous&rft.aulast=Brown&rft.aufirst=S&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Impact of saline tracer mixing on upscaled electrical resistivity under partially saturated conditions; insights from a pore-scale fluorimetry study AN - 1824215702; 2016-082560 AB - Time-lapse electrical resistivity tomography is a widely used geophysical method to remotely monitor water saturation and the migration of contaminant plumes. This is achieved by driving a known electrical current between an electrode pair while measuring the resulting voltage between another electrode pair. The electrical resistivity structure of the subsurface can be estimated by inversion of multiple current injection and voltage pairs. The effects of heterogeneous solute concentrations (i.e., fingering of a saline tracer) below the resolution limits of the tomogram are commonly ignored (i.e, the solution is assumed to be perfectly mixed below this scale). We have adapted an experimental set-up to study the effects of sub-resolution solute heterogeneities on the effective bulk electrical resistivity. We used a 2D analogous porous medium consisting of a Hele-Shaw cell containing a single layer of 4500 cylindrical solid grains built by soft lithography. We monitored the bulk electrical resistivity at a temporal resolution of 2 s. At the same time, we monitored the spatial distribution of the water/air phases and the saline solute concentration field in the water phase using a fluorescent tracer injected together with the saline solute and a high-resolution camera (27 pixels per mm, 12 bit images). We performed saline tracer tests under full and partial water saturations. The unsaturated flow was imposed by jointly injecting air and water. The bulk resistivities measured at the scale of the medium were confronted to resistivities computed numerically from the measured spatial distributions of the fluid phases and the salinity field. We find that the air distribution, saline tracer channeling and fingering, and mixing phenomena all result in large changes in the measured and simulated bulk resistivities by creating preferential flow paths or barriers for electric current at the pore scale. Based on these findings, we postulate that sub-resolution effects contribute to one of the most important inconsistencies in conventional time-lapse ERT imaging, namely the apparent loss of tracer mass. JF - American Geophysical Union Fall Meeting AU - Jougnot, Damien AU - Jimenez-Martinez, Joaquin AU - Meheust, Yves AU - Le Borgne, Tanguy AU - Linde, Niklas AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H44E EP - 04 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215702?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Impact+of+saline+tracer+mixing+on+upscaled+electrical+resistivity+under+partially+saturated+conditions%3B+insights+from+a+pore-scale+fluorimetry+study&rft.au=Jougnot%2C+Damien%3BJimenez-Martinez%2C+Joaquin%3BMeheust%2C+Yves%3BLe+Borgne%2C+Tanguy%3BLinde%2C+Niklas%3BAnonymous&rft.aulast=Jougnot&rft.aufirst=Damien&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Intermediate-scale experimental and numerical study of multiphase CO (sub 2) attenuation in layered shallow aquifers during leakage from geologic sequestration site AN - 1824215600; 2016-082555 AB - In order to effectively predict and mitigate the potential risks from leakage of stored CO (sub 2) , we must first understand the physicochemical processes that CO (sub 2) undergoes during migration through shallow aquifers, including dissolved phase advection and dispersion as well as gas phase exsolution, multiphase flow, and dissolution. Since field sites are inherently large-scale, heterogeneous, 3-D systems, large-scale experimental data is important to validate numerical models and to make confident predictions regarding CO (sub 2) migration. A large, highly instrumented, two-dimensional tank was built and packed with porous media to represent a portion of a layered shallow aquifer. Flow of water across the tank was established by applying a small difference in head between the two ends. A separate stream of water was then saturated with dissolved CO (sub 2) and injected into the bottom of the tank near the upstream end. Various saturation sensors measured the spatiotemporal pattern of gas phase evolution in the tank, while an external sensor and an Ion Chromatograph were used to monitor the dissolved CO (sub 2) concentrations at various locations in the system. The top of the tank was baffled into four sealed compartments, each of which was connected to a gas flow meter to monitor the spatiotemporal pattern of gas phase CO (sub 2) release to the atmosphere. Numerical simulations were also performed to better understand the fundamental physics that drove the observed CO (sub 2) evolution processes, and to help validate a widely used code using the experimental data. The simulations were performed with the Finite Element Heat and Mass Transfer (FEHM) software that was developed at Los Alamos National Laboratory. The model domain, porous media properties, and initial conditions were set up to match those of the experiment, and the boundary conditions were adjusted to investigate the mass transfer between the dissolved and gaseous phases of CO (sub 2) that developed within the system. Results from both the experiments and the simulations indicate that the layer of fine material prevented any release of gas phase CO (sub 2) to the atmosphere. In addition, exsolved gas phase CO (sub 2) accumulated beneath the fine layer and slowly dissolved into the clean water that came from the upstream end of the tank. This led to significant attenuation of dissolved CO (sub 2) migration throughout the system. JF - American Geophysical Union Fall Meeting AU - Plampin, M R AU - Pawar, R AU - Porter, M L AU - Illangasekare, T H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H44D EP - 07 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215600?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Intermediate-scale+experimental+and+numerical+study+of+multiphase+CO+%28sub+2%29+attenuation+in+layered+shallow+aquifers+during+leakage+from+geologic+sequestration+site&rft.au=Plampin%2C+M+R%3BPawar%2C+R%3BPorter%2C+M+L%3BIllangasekare%2C+T+H%3BAnonymous&rft.aulast=Plampin&rft.aufirst=M&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Influence of injection mode on transport properties in kilometer-scale three-dimensional discrete fracture networks AN - 1824215390; 2016-082582 AB - We investigate how the choice of injection mode impacts transport properties in kilometer-scale three-dimensional discrete fracture networks (DFN). The choice of injection mode, resident or flux-weighted, is designed to mimic different physical phenomena. It has been hypothesized that solute plumes injected under resident conditions evolve to behave similarly to solutes injected under flux-weighted conditions. Previously, computational limitations have prohibited the large-scale simulations required to investigate this hypothesis. Using a new high performance DFN suite, dfnWorks, we simulate flow in kilometer-scale three-dimensional DFNs based on fractured granite at the Forsmark site in Sweden, and adopt a Lagrangian approach to simulate transport therein. Results show that after traveling through a pre-equilibrium region both injection methods exhibit linear scaling of the first moment of travel time and power law scaling of the breakthrough curve with similar exponents, slightly larger than two. The physical mechanisms behind this evolution appear to be the combination of in-network channeling of mass into larger fractures, which offer reduced resistance to flow, and in-fracture channeling, which results from the topology of the DFN. JF - American Geophysical Union Fall Meeting AU - Hyman, J AU - Painter, S L AU - Viswanathan, H S AU - Makedonska, N AU - Karra, S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51C EP - 1370 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215390?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Influence+of+injection+mode+on+transport+properties+in+kilometer-scale+three-dimensional+discrete+fracture+networks&rft.au=Hyman%2C+J%3BPainter%2C+S+L%3BViswanathan%2C+H+S%3BMakedonska%2C+N%3BKarra%2C+S%3BAnonymous&rft.aulast=Hyman&rft.aufirst=J&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Fracture and consequences of caprock and cement observed by integrated triaxial coreflood and X-ray tomography AN - 1824214678; 2016-082524 AB - Mechanical damage to caprock and wellbore systems threatens the long-term integrity of CO (sub 2) storage reservoirs. While it is widely recognized that CO (sub 2) injection can generate damage-causing stresses, there is little information on the hydrologic consequences of the resulting fractures in terms of the magnitude of potential CO (sub 2) leakage. In this study, we perform experiments at reservoir conditions designed to fracture caprock and cement while simultaneously observing changes in permeability coupled with direct observation of fracture growth using x-ray video radiography and fracture geometry by x-ray tomography. Triaxial coreflood experiments using a direct-shear configuration were performed at confining pressures ranging from 3-22 MPa at 20 degrees C. Permeability was strongly dependent on confining pressure but also on the orientation of the fractures in relation to bedding. Samples fractured at high confining pressures had low permeability (typically <0.1 mD). Samples fractured at low confining pressures had permeabilities that ranged from 10s of mD across bedding to as high as 1 D parallel to bedding. Video radiography was collected through observations parallel to the direct shear plane. These captured the rate of fracture growth (on the order of seconds) and were used in relation to the onset of elevated permeability to investigate fracture-permeability dynamics. X-ray tomography was conducted at pressure but under static conditions and showed that fracture apertures at high confining pressures were significantly smaller than fracture apertures recovered at atmospheric conditions. Preliminary results suggest that increasing material plasticity accompanying high confining pressures resulted in decreased permeability, smaller apertures, and more poorly connected fracture networks. Typical sequestration conditions correspond to the higher confining pressures used in this study, suggesting that the failure characteristics of caprock and cement may be capable of limiting fracture transmissivity in response to mechanical damage. JF - American Geophysical Union Fall Meeting AU - Carey, J W AU - Frash, L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H43K EP - 04 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214678?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Fracture+and+consequences+of+caprock+and+cement+observed+by+integrated+triaxial+coreflood+and+X-ray+tomography&rft.au=Carey%2C+J+W%3BFrash%2C+L%3BAnonymous&rft.aulast=Carey&rft.aufirst=J&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integrated modeling and experiments to characterize coupled thermo-hydro-geomechanical-chemical processes in hydraulic fracturing AN - 1819897552; 2016-078373 AB - Hydraulic fracturing phenomena involve fluid-solid interactions embedded within coupled thermo-hydro-mechanical-chemical (THMC) processes over scales from microns to tens of meters. Feedbacks between processes result in complex dynamics that must be unraveled if one is to predict and, in the case of unconventional resources, facilitate fracture propagation, fluid flow, and interfacial transport processes. The proposed work is part of a broader class of complex systems involving coupled fluid flow and fractures that are critical to subsurface energy issues, such as shale oil, geothermal, carbon sequestration, and nuclear waste disposal. We use unique LANL microfluidic and triaxial core flood experiments integrated with state-of-the-art numerical simulation to reveal the fundamental dynamics of fracture-fluid interactions to characterize the key coupled processes that impact hydrocarbon production. We are also comparing CO (sub 2) -based fracturing and aqueous fluids to enhance production, greatly reduce waste water, while simultaneously sequestering CO (sub 2) . We will show pore, core and reservoir scale simulations/experiments that investigate the controlling mechanisms that control hydrocarbon production. JF - American Geophysical Union Fall Meeting AU - Viswanathan, Hari Selvi AU - Carey, James W AU - Karra, Satish AU - Porter, Mark L AU - Rougier, Esteban AU - Kang, Qinjun AU - Makedonska, Natalia AU - Hyman, Jeffrey AU - Jimenez Martinez, Joaquin AU - Frash, Luke AU - Chen, Li AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H23K EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819897552?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Integrated+modeling+and+experiments+to+characterize+coupled+thermo-hydro-geomechanical-chemical+processes+in+hydraulic+fracturing&rft.au=Viswanathan%2C+Hari+Selvi%3BCarey%2C+James+W%3BKarra%2C+Satish%3BPorter%2C+Mark+L%3BRougier%2C+Esteban%3BKang%2C+Qinjun%3BMakedonska%2C+Natalia%3BHyman%2C+Jeffrey%3BJimenez+Martinez%2C+Joaquin%3BFrash%2C+Luke%3BChen%2C+Li%3BAnonymous&rft.aulast=Viswanathan&rft.aufirst=Hari&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Modeling methane leakage from faulty wellbores in the Denver-Julesburg Basin, Colorado AN - 1819894613; 2016-080181 AB - Regulations in the State of Colorado mandate that all oil and gas wells be constructed with surface casings that extend 50 feet below the depth of the deepest potable aquifer, and production casings that are cemented to at least 200 feet above the shallowest producing formation. Building wells in accordance with the minimum regulations leaves an uncemented annulus between the production casing and the surrounding rock matrix, extending from the bottom of the surface casing to the top of the production casing cement. In Colorado, this annulus is sealed at the ground surface by the "bradenhead valve". Stray methane can enter the uncemented annulus through faulty cement in the producing formation or an intermediate gas-bearing zone and migrate upwards along the production casing. The gas dissolves into the annular fluid and accumulates below the bradenhead valve building pressure. Data from the Colorado Oil and Gas Conservation Commission (COGCC) indicates that 1,492 wells in the Denver-Julesburg (DJ) Basin have recorded bradenhead pressures greater than 20 psi since 2007. A leak of this kind creates the potential for both the single-phase transport of dissolved methane and the multiphase transport of methane gas away from the well. The degree to which methane transport occurs depends not only on the size of the leak but also the construction of the wellbore. In Colorado, the definition of potable groundwater has changed with time. To meet increasing demands for water, drinking water wells have been drilled deeper. As a result, there are potentially 4,144 wells in the DJ Basin with surface casings too shallow to protect the deepest potable aquifer. In this work, we investigate how a methane leak into the open annulus of an oil and gas wellbore, could result in the transport of dissolved and gas phase methane into a nearby drinking water aquifer. We construct a multiphase wellbore model that computes the pressure distribution and gas fraction along the uncemented annulus of an oil and gas well during a methane leak. The results of the wellbore simulation are used as a boundary condition for a three-dimensional multiphase flow simulation of methane transport away from the annulus of a well. Data from the COGCC database are used to constrain the simulations and construct scenarios representative of the DJ Basin. JF - American Geophysical Union Fall Meeting AU - Lackey, Greg AU - Rajaram, Harihar AU - Karra, Satish AU - Sherwood, Owen AU - Burke, Troy L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11B EP - 1334 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894613?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+methane+leakage+from+faulty+wellbores+in+the+Denver-Julesburg+Basin%2C+Colorado&rft.au=Lackey%2C+Greg%3BRajaram%2C+Harihar%3BKarra%2C+Satish%3BSherwood%2C+Owen%3BBurke%2C+Troy+L%3BAnonymous&rft.aulast=Lackey&rft.aufirst=Greg&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Site guidelines for a deep borehole field test AN - 1819894300; 2016-080172 AB - The US DOE Office of Nuclear Energy Used Nuclear Fuel Disposition Campaign (UFDC) is initiating a Deep Borehole Field Test (DBFT), without use of any radioactive waste, to evaluate the geoscience of the approach and technical capabilities for implementation. DOE has identified Sandia National Laboratories (SNL) as the Technical Lead for the UFDC DBFT Project, with the role of supporting DOE in (i) developing the overall DBFT Project Plan, (ii) management and integration of all DBFT Project activities, and (iii) providing Project technical guidance to DOE, other DOE National Laboratories, and university partners. The DBFT includes drilling one Characterization Borehole (CB-8.5" diameter), followed by an optional Field Test Borehole (FTB), to a depth of about 5,000 m (16,400 feet) into crystalline basement rock in a geologically stable continental location. The DBFT CB will be drilled and completed to facilitate downhole scientific testing and analyses. If site conditions are found to be favorable, DOE may drill the larger-diameter (17") FTB to facilitate proof-of-concept of handling, emplacement, and retrieval activities using surrogate waste containers. Guidelines for favorable DBFT site geohydrochemical and geomechanical conditions will be discussed and status of the DBFT Project will be provided. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. SAND2015-6426A. JF - American Geophysical Union Fall Meeting AU - Sassani, David AU - Kuhlman, Kristopher L AU - Freeze, Geoff A AU - MacKinnon, Robert J AU - Perry, Frank AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11B EP - 1325 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894300?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Site+guidelines+for+a+deep+borehole+field+test&rft.au=Sassani%2C+David%3BKuhlman%2C+Kristopher+L%3BFreeze%2C+Geoff+A%3BMacKinnon%2C+Robert+J%3BPerry%2C+Frank%3BAnonymous&rft.aulast=Sassani&rft.aufirst=David&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Deep boreholes seals subjected to high P,T-conditions; proposed experimental studies AN - 1819894128; 2016-080183 AB - Deep borehole experimental work will constrain the P,T conditions which "seal" material will experience in deep borehole crystalline rock repositories. The rocks of interest to this study include mafic (amphibolites) and silicic (granitic gneiss) end members. The experiments will systematically add components to capture discrete changes in both water and EBS component chemistries. Experiments in the system wall rock-clay-concrete-groundwater will evaluate interactions among components, including: mineral phase stability, metal corrosion rates and thermal limits. Based on engineered barrier studies, experimental investigations will move forward with three focusses. First, evaluation of interaction between "seal" materials and repository wall rock (crystalline) under fluid-saturated conditions over long-term (i.e., six-month) experiments; which reproduces the thermal pulse event of a repository. Second, perform experiments to determine the stability of zeolite minerals (analcime-wairakitess) under repository conditions. Both sets of experiments are critically important for understanding mineral paragenesis (zeolites and/or clay transformations) associated with "seals" in contact with wall rock at elevated temperatures. Third, mineral growth at the metal interface is a principal control on the survivability (i.e. corrosion) of waste canisters in a repository. The objective of this planned experimental work is to evaluate physio-chemical processes for "seal" components and materials relevant to deep borehole disposal. These evaluations will encompass multi-laboratory efforts for the development of seals concepts and application of Thermal-Mechanical-Chemical (TMC) modeling work to assess barrier material interactions with subsurface fluids and other barrier materials, their stability at high temperatures, and the implications of these processes to the evaluation of thermal limits. JF - American Geophysical Union Fall Meeting AU - Caporuscio, Florie AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11B EP - 1336 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894128?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Deep+boreholes+seals+subjected+to+high+P%2CT-conditions%3B+proposed+experimental+studies&rft.au=Caporuscio%2C+Florie%3BAnonymous&rft.aulast=Caporuscio&rft.aufirst=Florie&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Numerical investigation of secondary capture of CO2 leakage in permeable stratigraphic layers within caprock AN - 1819893068; 2016-080180 AB - One of the primary leakage pathways of concern at geologic CO2 sequestration sites is abandoned wellbores. Abandoned wellbores are prevalent at many potential CO2 sequestration sites as a result of fossil energy exploration and extraction. Permeable stratigraphic layers within the caprock above the primary reservoir but below aquifers may provide secondary capture of CO2 leakage along wellbores. These features are prevalent at many potential sequestration sites. In fact, under-pressurized permeable layers encountered during drilling operations are referred to as "thief zones" due to the loss of drilling fluids when they are encountered. While it is unlikely that CO2 leakage will encounter thief zones, unless the CO2 injection operation leads to damage of the caprock, encountering permeable stratigraphic layers along an abandoned wellbore is a likely scenario. The ability for these permeable stratigraphic layers to act as secondary reservoirs is investigated here. We use the FEHM simulator to perform 3D, multi-phase, multi-component, numerical simulations of CO2 and brine leakage along an abandoned wellbore that encounters a potential secondary reservoir. We perform a parametric study of these simulations varying thief zone permeability, wellbore permeability, and CO2 injection rates to investigate the capture provided by the secondary reservoir. The results of this study provide indications of the potential for secondary reservoirs to mitigate leakage along abandoned wellbores during and after CO2 sequestration operations. JF - American Geophysical Union Fall Meeting AU - Harp, Dylan R AU - Pawar, Rajesh AU - Del Valle Maldonado, Jaileen AU - Carey, James W AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11B EP - 1333 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819893068?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Numerical+investigation+of+secondary+capture+of+CO2+leakage+in+permeable+stratigraphic+layers+within+caprock&rft.au=Harp%2C+Dylan+R%3BPawar%2C+Rajesh%3BDel+Valle+Maldonado%2C+Jaileen%3BCarey%2C+James+W%3BAnonymous&rft.aulast=Harp&rft.aufirst=Dylan&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Inexact socio-dynamic modeling of groundwater contamination management AN - 1815673287; 2016-074066 AB - Groundwater contamination may alter the behaviors of the public such as adaptation to such a contamination event. On the other hand, social behaviors may affect groundwater contamination and associated risk levels such as through changing ingestion amount of groundwater due to the contamination. Decisions should consider not only the contamination itself, but also social attitudes on such contamination events. Such decisions are inherently associated with uncertainty, such as subjective judgement from decision makers and their implicit knowledge on selection of whether to supply water or reduce the amount of supplied water under the scenario of the contamination. A socio-dynamic model based on the theories of information-gap and fuzzy sets is being developed to address the social behaviors facing the groundwater contamination and applied to a synthetic problem designed based on typical groundwater remediation sites where the effects of social behaviors on decisions are investigated and analyzed. Different uncertainties including deep uncertainty and vague/ambiguous uncertainty are effectively and integrally addressed. The results can provide scientifically-defensible decision supports for groundwater management in face of the contamination. JF - American Geophysical Union Fall Meeting AU - Vesselinov, Velimir V AU - Zhang, Xiaodong AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract GC33C EP - 1298 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815673287?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Inexact+socio-dynamic+modeling+of+groundwater+contamination+management&rft.au=Vesselinov%2C+Velimir+V%3BZhang%2C+Xiaodong%3BAnonymous&rft.aulast=Vesselinov&rft.aufirst=Velimir&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Frequency modulated spectroscopy (FMS); a novel method for standoff trace gas detection AN - 1815673115; 2016-075801 AB - Geologic storage of carbon rich gases captured from the emissions of fossil fuel combustion is a promising option to mitigate against greenhouse warming scenarios. Monitoring surface gas seepage is a strategy to create a successful geologic storage facility. At Los Alamos National Laboratory, new laser systems have been engineered which can measure concentration and isotope ratios of CO (sub 2) , CH (sub 4) , and H (sub 2) S in real time and up to 1 km distances. These systems can work in closed and open path (LIght Detection And Ranging or LIDAR) settings where we use Frequency Modulated Spectroscopy (FMS) to measure the harmonics of the primary absorption peak for CO (sub 2) , CH (sub 4) , and H (sub 2) S absorptions. This provides between 100-1000 times sensitivity to allow for small concentrations or low abundance isotopes to be observed at distance. We tested these systems at various locations around Los Alamos National Laboratory and at the ZERT Controlled Release site in Bozeman Montana. Results show pollution signatures, ecologically productive fluxes, and carbon storage signatures depending upon location monitored. We will present these results and share unique features of this novel system. Remote detection of concentration and isotope profiles of greenhouse and toxic gases can provide a new method for stand-off detection and mapping of gas in the environment. For geologic storage scenarios, this will allow for larger areas to be interrogated for subsurface CO (sub 2) leak detection and can accelerate the Monitoring Verification and Accounting (MVA) mission goals for the Carbon Sequestration and Storage (CCS) communities. JF - American Geophysical Union Fall Meeting AU - Fessenden, Julianna E AU - Clegg, Samuel M AU - Nowak-Lovato, Kristy AU - Martinez, Ronald AU - Dobeck, Laura M AU - Spangler, Lee AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H23G EP - 1655 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815673115?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Frequency+modulated+spectroscopy+%28FMS%29%3B+a+novel+method+for+standoff+trace+gas+detection&rft.au=Fessenden%2C+Julianna+E%3BClegg%2C+Samuel+M%3BNowak-Lovato%2C+Kristy%3BMartinez%2C+Ronald%3BDobeck%2C+Laura+M%3BSpangler%2C+Lee%3BAnonymous&rft.aulast=Fessenden&rft.aufirst=Julianna&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Potential for the use of wireless sensor networks for monitoring of CO (sub 2) leakage risks AN - 1815673086; 2016-075802 AB - Storage of supercritical CO (sub 2) in deep saline geologic formation is under study as a means to mitigate potential global climate change from green house gas loading to the atmosphere. Leakage of CO (super 2) from these formations poses risk to the storage permanence goal of 99% of injected CO (sub 2) remaining sequestered from the atmosphere. Leaked CO (sub 2) that migrates into overlying groundwater aquifers may cause changes in groundwater quality that pose risks to environmental and human health. For these reasons, technologies for monitoring, measuring and accounting of injected CO (sub 2) are necessary for permitting of CO (sub 2) sequestration projects under EPA's class VI CO (sub 2) injection well regulations. While the probability of leakage related to CO (sub 2) injection is thought to be small at characterized and permitted sites, it is still very important to protect the groundwater resources and develop methods that can efficiently and accurately detect CO (sub 2) leakage. Methods that have been proposed for leakage detection include remote sensing, soil gas monitoring, geophysical techniques, pressure monitoring, vegetation stress and eddy covariance measurements. We have demonstrated the use of wireless sensor networks (WSN) for monitoring of subsurface contaminant plumes. The adaptability of this technology for leakage monitoring of CO (sub 2) through geochemical changes in the shallow subsurface is explored. For this technology to be viable, it is necessary to identify geochemical indicators such as pH or electrical conductivity that have high potential for significant change in groundwater in the event of CO (sub 2) leakage. This talk presents a conceptual approach to use WSNs for CO (sub 2) leakage monitoring. Based on our past work on the use of WSN for subsurface monitoring, some of the challenges that need to be over come for this technology to be viable for leakage detection will be discussed. JF - American Geophysical Union Fall Meeting AU - Pawar, Rajesh AU - Illangasekare, Tissa H AU - Han, Qi AU - Jayasumana, Anura AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H23G EP - 1656 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815673086?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Potential+for+the+use+of+wireless+sensor+networks+for+monitoring+of+CO+%28sub+2%29+leakage+risks&rft.au=Pawar%2C+Rajesh%3BIllangasekare%2C+Tissa+H%3BHan%2C+Qi%3BJayasumana%2C+Anura%3BAnonymous&rft.aulast=Pawar&rft.aufirst=Rajesh&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integrating ensemble data assimilation and indicator geostatistics to delineate hydrofacies spatial distribution AN - 1815672274; 2016-075721 AB - We present a new framework for delineating spatial distributions of hydrofacies from indirect data by linking ensemble-based data assimilation method (e.g., Ensemble Kalman filter, EnKF) with indicator geostatistics based on transition probability. The nature of ensemble data assimilation makes the framework efficient and flexible to integrate various types of observation data. We leveraged the level set concept to establish transformations between discrete hydrofacies and continuous variables, which is a critical element to implement ensemble data assimilation methods for hydrofacies delineation. T-PROGS is used to generate realizations of hydrofacies fields given conditioning points. An additional quenching step of T-PROGS is taken to preserve spatial structure of updated hydrofacies after each data assimilation step. This new method is illustrated by a two-dimensional (2-D) synthetic study in which transient hydraulic head data resulting from pumping is assimilated to delineate hydrofacies distribution. Our results showed that the proposed framework was able to characterize hydrofacies distribution and their associated permeability with adequate accuracy even with limited direct hydrofacies data. This method may find broader applications in facies delineation using other types of indirect measurements, such as tracer tests and geophysical surveys. JF - American Geophysical Union Fall Meeting AU - Song, Xuehang AU - Chen, Xingyuan AU - Ye, Ming AU - Dai, Zhenxue AU - Hammond, Glenn E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H13A EP - 1488 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815672274?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Integrating+ensemble+data+assimilation+and+indicator+geostatistics+to+delineate+hydrofacies+spatial+distribution&rft.au=Song%2C+Xuehang%3BChen%2C+Xingyuan%3BYe%2C+Ming%3BDai%2C+Zhenxue%3BHammond%2C+Glenn+E%3BAnonymous&rft.aulast=Song&rft.aufirst=Xuehang&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Fluid behavior and fluid-solid interactions in nanoporous media AN - 1815672170; 2016-075776 AB - Although shale oil/gas production in the US has increased exponentially, the low energy recovery is a daunting problem needed to be solved for its sustainability and continued growth, especially in light of the recent oil/gas price decline. This is apparently related to the small porosity (a few to a few hundred nm) and low permeability (10-16-10-20 m (super 2) ) of tight shale formations. The fundamental question lies in the anomalous behavior of fluids in nanopores due to confinement effects, which, however, remains poorly understood. In this study, we combined experimental characterization and observations, particularly using small-angle neutron scattering (SANS), with pore-scale modeling using lattice Boltzmann method (LBM), to examine the fluid behavior and fluid-solid interactions in nanopores at reservoir conditions. Experimentally, we characterized the compositions and microstructures of a shale sample from Wolfcamp, Texas, using a variety of analytical techniques. Our analyses reveal that the shale sample is made of organic-matter (OM)-lean and OM-rich layers that exhibit different chemical and mineral compositions, and microstructural characteristics. Using the hydrostatic pressure system and gas-mixing setup we developed, in-situ SANS measurements were conducted at pressures up to 20 kpsi on shale samples imbibed with water or water-methane solutions. The obtained results indicate that capillary effect plays a significant role in fluid-nanopore interactions and the associated changes in nanopore structures vary with pore size and pressure. Computationally, we performed LBM modeling to simulate the flow behavior of methane in kerogen nanoporous structure. The correction factor, which is the ratio of apparent permeability to intrinsic permeability, was calculated. Our results show that the correction factor is always greater than one (non-continuum/non-Darcy effects) and increases with decreasing nanopore size, intrinsic permeability and pressure. Hence, the confined fluids in nanoporous media exhibit significantly different behavior from bulk fluids, which has important implications for developing better production strategies for unconventional reservoirs. JF - American Geophysical Union Fall Meeting AU - Xu, Hongwu AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H23D EP - 1609 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815672170?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Fluid+behavior+and+fluid-solid+interactions+in+nanoporous+media&rft.au=Xu%2C+Hongwu%3BAnonymous&rft.aulast=Xu&rft.aufirst=Hongwu&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Microfluidic investigation of oil mobilization in shale fracture networks at reservoir conditions AN - 1815670857; 2016-075779 AB - Investigations of pore-scale fluid flow and transport phenomena using engineered micromodels has steadily increased in recent years. In these investigations fluid flow is restricted to two-dimensions allowing for real time visualization and quantification of complex flow and reactive transport behavior, which is difficult to obtain in other experimental systems. One drawback to these studies is the use of engineered materials that do not faithfully represent the rock properties (e.g., porosity, wettability, roughness, etc.) encountered in subsurface formations. In this work, we describe a unique high pressure (up to 1500 psi) and temperature (up to 80 degrees C) microfluidics experimental system in which we investigate fluid flow and transport in geo-material (e.g., shale, Portland cement, etc.) micromodels. The use of geo-material micromodels allows us to better represent fluid-rock interactions including wettability, chemical reactivity, and nano-scale porosity at conditions representative of natural subsurface environments. Here, we present experimental results in fracture systems with applications to hydrocarbon mobility in hydraulically fractured shale. Complex fracture network patterns are derived from 3D x-ray tomography images of actual fractures created in shale rock cores. We use both shale and glass micromodels, allowing for a detailed comparison between flow phenomena in the different materials. We discuss results from two-phase huff-and-puff experiments involving N (sub 2) and n-Decane, as well as three-phase displacement experiments involving supercritical CO (sub 2) , brine, and n-Decane. JF - American Geophysical Union Fall Meeting AU - Porter, Mark L AU - Jimenez-Martinez, Joaquin AU - Carey, James W AU - Viswanathan, Hari Selvi AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H23D EP - 1612 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815670857?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Microfluidic+investigation+of+oil+mobilization+in+shale+fracture+networks+at+reservoir+conditions&rft.au=Porter%2C+Mark+L%3BJimenez-Martinez%2C+Joaquin%3BCarey%2C+James+W%3BViswanathan%2C+Hari+Selvi%3BAnonymous&rft.aulast=Porter&rft.aufirst=Mark&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Mixing in three-phase systems; implications for enhanced oil recovery and unconventional gas extraction AN - 1815670786; 2016-075781 AB - Although the mixing of fluids within a porous media is a common process in natural and industrial systems, how the degree of mixing depends on the miscibility of multiple phases is poorly characterized. Often, the direct consequence of miscible mixing is the modification of the resident fluid (brine and hydrocarbons) rheological properties. We investigate supercritical (sc)CO (sub 2) displacement and mixing processes in a three-phase system (scCO (sub 2) , oil, and H (sub 2) O) using a microfluidics experimental system that accommodates the high pressures and temperatures encountered in fossil fuel extraction operations. The miscibility of scCO (sub 2) with the resident fluids, low with aqueous solutions and high with hydrocarbons, impacts the mixing processes that control sweep efficiency in enhanced oil recovery (EOR) and the unlocking of the system in unconventional oil and gas extraction. Using standard volume-averaging techniques we upscale the aqueous phase saturation to the field-scale (i.e., Darcy scale) and interpret the results as a simpler two-phase system. This process allows us to perform a statistical analysis to quantify i) the degree of heterogeneity in the system resulting from the immiscible H (sub 2) O and ii) how that heterogeneity impacts mixing between scCO (sub 2) and oil and their displacement. Our results show that when scCO (sub 2) is used for miscible displacement, the presence of an aqueous solution, which is common in secondary and tertiary EOR and unconventional oil and gas extraction, strongly impacts the mixing of scCO (sub 2) with the hydrocarbons due to low scCO (sub 2) -H (sub 2) O miscibility. H (sub 2) O, which must be displaced advectively by the injected scCO (sub 2) , introduces spatio-temporal variability into the system that acts as a barrier between the two miscibile fluids. This coupled with the effect of viscosity contrast, i.e., viscous fingering, has an impact on the mixing of the more miscible pair. JF - American Geophysical Union Fall Meeting AU - Jimenez-Martinez, Joaquin AU - Porter, Mark L AU - Hyman, Jeffrey AU - Carey, James W AU - Viswanathan, Hari Selvi AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H23D EP - 1614 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815670786?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Mixing+in+three-phase+systems%3B+implications+for+enhanced+oil+recovery+and+unconventional+gas+extraction&rft.au=Jimenez-Martinez%2C+Joaquin%3BPorter%2C+Mark+L%3BHyman%2C+Jeffrey%3BCarey%2C+James+W%3BViswanathan%2C+Hari+Selvi%3BAnonymous&rft.aulast=Jimenez-Martinez&rft.aufirst=Joaquin&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Modeling studies to constrain fluid and gas migration associated with hydraulic fracturing operations AN - 1815670779; 2016-075919 AB - The dramatic increase in the extraction of unconventional oil and gas resources using horizontal wells and hydraulic fracturing (fracking) technologies has raised concerns about potential environmental impacts. Large volumes of hydraulic fracturing fluids are injected during fracking. Incidents of stray gas occurrence in shallow aquifers overlying shale gas reservoirs have been reported; whether these are in any way related to fracking continues to be debated. Computational models serve as useful tools for evaluating potential environmental impacts. We present modeling studies of hydraulic fracturing fluid and gas migration during the various stages of well operation, production, and subsequent plugging. The fluid migration models account for overpressure in the gas reservoir, density contrast between injected fluids and brine, imbibition into partially saturated shale, and well operations. Our results highlight the importance of representing the different stages of well operation consistently. Most importantly, well suction and imbibition both play a significant role in limiting upward migration of injected fluids, even in the presence of permeable connecting pathways. In an overall assessment, our fluid migration simulations suggest very low risk to groundwater aquifers when the vertical separation from a shale gas reservoir is of the order of 1000' or more. Multi-phase models of gas migration were developed to couple flow and transport in compromised wellbores and subsurface formations. These models are useful for evaluating both short-term and long-term scenarios of stray methane release. We present simulation results to evaluate mechanisms controlling stray gas migration, and explore relationships between bradenhead pressures and the likelihood of methane release and transport. JF - American Geophysical Union Fall Meeting AU - Rajaram, Harihar AU - Birdsell, Daniel AU - Lackey, Gregory AU - Karra, Satish AU - Viswanathan, Hari Selvi AU - Dempsey, David AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR53A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815670779?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+studies+to+constrain+fluid+and+gas+migration+associated+with+hydraulic+fracturing+operations&rft.au=Rajaram%2C+Harihar%3BBirdsell%2C+Daniel%3BLackey%2C+Gregory%3BKarra%2C+Satish%3BViswanathan%2C+Hari+Selvi%3BDempsey%2C+David%3BAnonymous&rft.aulast=Rajaram&rft.aufirst=Harihar&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Dynamically triggered slip and sustained fault gouge instability associated with unique slip behavior under laboratory shear conditions AN - 1812222569; 2016-072425 AB - We investigate dynamic-wave triggered slip under laboratory shear conditions. The experiment is comprised of a 3-block system containing two gouge layers composed of glass beads and held in place by a fixed load in a bi-axial configuration. When the system is sheared under steady state conditions at loads from 3-8 MPa, stick-slip exhibiting a characteristic recurrence time is observed. Under these load conditions, we find that shear failure may be instantaneously triggered by a brief dynamical wave if the system is in a critical shear-stress state, near failure. Dynamic triggering is only observed when the dynamic wave amplitude exceeds strains of 10 (super -7) . Following triggering, the gouge material remains in an unstable state for long periods of time as manifest by unique slip characteristics not observed during spontaneous events: the measured physical characteristics-the gouge material strength recovery, the gouge layer thickness, the gouge shear modulus and the stick-slip recurrence time recover over many stick-slip cycles following triggering. This work suggests that faults must be critically stressed to trigger under dynamic conditions and that the recovery process following a dynamically triggered event differs from the recovery following a spontaneous event. JF - American Geophysical Union Fall Meeting AU - Johnson, P A AU - Carmeliet, J AU - Savage, H M AU - Scuderi, M AU - Carpenter, B M AU - Guyer, R A AU - Daub, E G AU - Marone, C AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR33C EP - 2681 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812222569?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Dynamically+triggered+slip+and+sustained+fault+gouge+instability+associated+with+unique+slip+behavior+under+laboratory+shear+conditions&rft.au=Johnson%2C+P+A%3BCarmeliet%2C+J%3BSavage%2C+H+M%3BScuderi%2C+M%3BCarpenter%2C+B+M%3BGuyer%2C+R+A%3BDaub%2C+E+G%3BMarone%2C+C%3BAnonymous&rft.aulast=Johnson&rft.aufirst=P&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Is frictional healing slip-dependent? AN - 1812221711; 2016-072438 AB - Frictional re-strengthening of bare rock surfaces at very low stresses and near zero slip rate, as observed in the laboratory, is traditionally interpreted as showing support for purely time-dependent healing as embodied in the Aging law. However, while slide-hold-slide experiments on bare surfaces do show an apparent (purely) time-dependent increase in the static friction upon reslide, we show that the stress minima attained during the preceding holds show a strong slip-dependence which contradict the Aging law. A velocity strengthening Slip law explains such data much better. We also show that, large velocity step decreases, which drive the system far below steady state just like long holds, clearly support the slip-dependent response of the Slip law over the time-dependent healing contained in the Aging law. But, while time-dependent healing has an intuitive physical picture in terms of growth of the 'real contact area' with time, it is more difficult to ascribe one to slip-dependent healing. Here, we explore the possibility that the slip-dependence arises out of an interplay between contact 'quality' and 'quantity' at the scale of the asperity contacts. First, to further study the slip-dependence of healing, we carry out large velocity step decreases and sequences of long slide-hold-slides on both bare rock and gouge. Secondly, to probe the micro-mechanical origins of healing, we complement our mechanical data with amplitudes and travel time data of ultrasonic P- and S- waves transmitted across the sliding interface. While ultrasonic P-wave transmissivity has been used as a proxy for 'real contact area' in friction experiments by Nagata et al. (2012, 2014) before, the simultaneous use of P- and S-phases in our experiments is designed specifically to probe contact rheology. Initial results show strong correlations between changes in friction, transmitted wave amplitudes and travel times in response to changes in slip rate. We also observe important differences between the friction and ultrasonic data which might illuminate the role of contact 'quality' in determining frictional strength. Using the ultrasonic data along with numerical modeling and inversion of the friction data, we hope to probe the micro-mechanical origins of frictional healing and rate-and-state friction in general. JF - American Geophysical Union Fall Meeting AU - Bhattacharya, Prajukti AU - Rubin, A M AU - Ryan, K L AU - Riviere, Jacques V AU - Marone, C AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR33C EP - 2694 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812221711?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Is+frictional+healing+slip-dependent%3F&rft.au=Bhattacharya%2C+Prajukti%3BRubin%2C+A+M%3BRyan%2C+K+L%3BRiviere%2C+Jacques+V%3BMarone%2C+C%3BAnonymous&rft.aulast=Bhattacharya&rft.aufirst=Prajukti&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Effects of isolated drainage on the seasonal evolution of the Greenland subglacial hydrologic system AN - 1812218319; 2016-068640 AB - The Greenland Ice Sheet speeds up every summer as melt from the surface penetrates km-thick ice through moulins, but observations show that continued meltwater inputs lead to a decay in the speedup and late summer velocities that can be lower than the winter speed. While this decreasing ice dynamic response to meltwater forcing has often been attributed to channelization of the subglacial drainage system, recent observations of water pressure in moulins at one location indicate that the efficiency of the moulin-channel system does not increase during the second half of summer, failing to explain the concurrent drop in ice velocity. Simultaneous observations of lowering water pressure in boreholes sampling poorly-connected regions of the bed suggest that changes in isolated regions of the bed over summer modulate the overall basal traction of the ice sheet. We explore the role of isolated drainage using models of subglacial hydrology and ice dynamics. The subglacial hydrology model includes components for distributed linked-cavity drainage, channelized drainage, and a new component for weakly-connected isolated drainage. Passive cavity opening in the isolated drainage region is capable of reproducing observed diurnal variations in borehole water pressure. Within the model, gradual drainage of water from the isolated cavities leads to a seasonal reduction in water pressure there and an associated decrease in ice speed, similar to the observations. JF - American Geophysical Union Fall Meeting AU - Hoffman, Matthew J AU - Price, Stephen F AU - Andrews, Lauren C AU - Catania, Ginny A AU - Gulley, Jason D AU - Luethi, Martin P AU - Ryser, Claudia AU - Hawley, Robert L AU - Neumann, Thomas AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C43E EP - 05 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812218319?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Effects+of+isolated+drainage+on+the+seasonal+evolution+of+the+Greenland+subglacial+hydrologic+system&rft.au=Hoffman%2C+Matthew+J%3BPrice%2C+Stephen+F%3BAndrews%2C+Lauren+C%3BCatania%2C+Ginny+A%3BGulley%2C+Jason+D%3BLuethi%2C+Martin+P%3BRyser%2C+Claudia%3BHawley%2C+Robert+L%3BNeumann%2C+Thomas%3BAnonymous&rft.aulast=Hoffman&rft.aufirst=Matthew&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Towards quantifying uncertainty in Greenland's contribution to 21st century sea-level rise AN - 1812218192; 2016-068706 AB - We present recent work towards developing a methodology for quantifying uncertainty in Greenland's 21st century contribution to sea-level rise. While we focus on uncertainties associated with the optimization and calibration of the basal sliding parameter field, the methodology is largely generic and could be applied to other (or multiple) sets of uncertain model parameter fields. The first step in the workflow is the solution of a large-scale, deterministic inverse problem, which minimizes the mismatch between observed and computed surface velocities by optimizing the two-dimensional coefficient field in a linear-friction sliding law. We then expand the deviation in this coefficient field from its estimated "mean" state using a reduced basis of Karhunen-Loeve Expansion (KLE) vectors. A Bayesian calibration is used to determine the optimal coefficient values for this expansion. The prior for the Bayesian calibration can be computed using the Hessian of the deterministic inversion or using an exponential covariance kernel. The posterior distribution is then obtained using Markov Chain Monte Carlo run on an emulator of the forward model. Finally, the uncertainty in the modeled sea-level rise is obtained by performing an ensemble of forward propagation runs. We present and discuss preliminary results obtained using a moderate-resolution model of the Greenland Ice sheet. As demonstrated in previous work, the primary difficulty in applying the complete workflow to realistic, high-resolution problems is that the effective dimension of the parameter space is very large. JF - American Geophysical Union Fall Meeting AU - Perego, Mauro AU - Tezaur, Irina AU - Price, Stephen F AU - Jakeman, John AU - Eldred, Mike AU - Salinger, Andy AU - Hoffman, Matthew J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C53E EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812218192?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Towards+quantifying+uncertainty+in+Greenland%27s+contribution+to+21st+century+sea-level+rise&rft.au=Perego%2C+Mauro%3BTezaur%2C+Irina%3BPrice%2C+Stephen+F%3BJakeman%2C+John%3BEldred%2C+Mike%3BSalinger%2C+Andy%3BHoffman%2C+Matthew+J%3BAnonymous&rft.aulast=Perego&rft.aufirst=Mauro&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Layered structure of the North American upper mantle inferred by the combination of long and short period seismic constraints AN - 1812215304; 2016-068788 AB - The nature of the lithosphere-asthenosphere boundary (LAB) and mid-lithospheric discontinuities (MLDs) across the continents remains a subject of debate, and different approaches have been used to image the structure of the lithosphere at continental scale, in particular in North America (NA). Surface wave tomography provides smooth models and cannot uniquely resolve sharp interfaces, such as the Moho, the LAB or the possible presence of MLDs. In order to image such discontinuities, methods based on the analysis of the scattered wavefield have been developed, such as receiver functions (RF), which are able to image mantle interfaces under single stations. Since surface wave data and receiver functions provide complementary constraints on shallow earth structure, it is natural to combine them to obtain more robust models of the crust and upper-mantle (e.g. Julia et al., 2000; Lawrence and Wiens, 2004). Here we present a set of 1D shear-wave models, depicting the first 300 km of the upper mantle, under a number of stations in North America, using Bayesian inversions. There are several original aspects to our approach: 1) we consider both Love and Rayleigh wave dispersion data, allowing us to constrain radial anisotropy; 2) instead of a standard RF methodology, scattered body waveforms (i.e. the coda of P phases) are directly inverted through a cross-convolution misfit function (Bodin et al., 2014), thus avoiding the instability issues arising from deconvolution, and, importantly, allowing us to account for crustal multiples without ambiguity; 3) we use a Bayesian trans-dimensional MCMC approach in which the number of isotropic and of anisotropic layers are treated as unknowns, allowing us to obtain models compatible with the data, with the least number of parameters. In contrast to standard RF analysis, our approach allows us to constrain not only the position of discontinuities, but also the variations of shear wave velocity between them, thus providing better constraints on the characteristics of intra-lithospheric low velocity layers. JF - American Geophysical Union Fall Meeting AU - Calo, M AU - Bodin, T AU - Romanowicz, B A AU - Roy, C AU - Larmat, C S AU - Maceira, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract DI24A EP - 07 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812215304?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Layered+structure+of+the+North+American+upper+mantle+inferred+by+the+combination+of+long+and+short+period+seismic+constraints&rft.au=Calo%2C+M%3BBodin%2C+T%3BRomanowicz%2C+B+A%3BRoy%2C+C%3BLarmat%2C+C+S%3BMaceira%2C+M%3BAnonymous&rft.aulast=Calo&rft.aufirst=M&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Siple Coast ice streams reorganization following the reactivation of Kamb ice stream tributaries, West Antarctica AN - 1812213905; 2016-068679 AB - Ice streams in Antarctica account for most of the ice volume discharged to the ocean, and their flow variability greatly influences the mass balance of the ice sheet. Today, the Siple Coast region is the only one in West Antarctica to experience a positive mass balance of 36 Gt/yr, as a consequence of the stagnation of Kamb Ice Stream 170 years ago as well as the ongoing slowdown of Whillans Ice Stream. However, this positive trend could be temporary, as reconstructions of past flow show that the Siple Coast ice streams have experienced significant flow variability over the past millennia, with episodes of stagnation typically followed by reactivation on a centennial timescale. The impact that this internally induced variability may have on the future mass balance remains unknown. Here, we use the three-dimensional ice sheet model CISM to study the flow variability of the Ross ice streams over a 250 year period, during which the basal properties controlling ice flow evolve according to the distribution of meltwater in a dynamic, regional hydrological system, coupled to a subglacial till layer. To obtain realistic initial flow conditions, we assimilate the 1997 velocity data available for this region. During the forward simulation, all ice streams undergo dynamic changes, traced to persistently weak bed conditions beneath the tributaries of the currently dormant Kamb Ice Stream. This source of regional instability propagates into the catchments of Whillans as well as Bindschadler ice streams within decades, and reorganizes the flow of all the Ross ice streams within two centuries. Ice piracy from Kamb Ice Stream prolongs the fast flow on Whillans Ice Stream, maintaining its trunk active during the first modeled century. At the same time, ice piracy into the catchment of Bindschadler ice stream reactivates the relict Siple Ice Stream, which significantly reduces the mass balance for this region. The trunk of Kamb Ice Stream reactivates last (during the second half of the experiment), because high rates of basal freezing were induced after its stagnation. These model outputs are similar to the reconstruction of past flow. We discuss the mechanisms of flow migrations, and the implication for the future mass balance of the region. JF - American Geophysical Union Fall Meeting AU - Christoffersen, Poul AU - Bougamont, Marion H AU - Price, Stephen F AU - Fricker, Helen A AU - Tulaczyk, Slawek M AU - Carter, Sasha P AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C51C EP - 0729 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812213905?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Siple+Coast+ice+streams+reorganization+following+the+reactivation+of+Kamb+ice+stream+tributaries%2C+West+Antarctica&rft.au=Christoffersen%2C+Poul%3BBougamont%2C+Marion+H%3BPrice%2C+Stephen+F%3BFricker%2C+Helen+A%3BTulaczyk%2C+Slawek+M%3BCarter%2C+Sasha+P%3BAnonymous&rft.aulast=Christoffersen&rft.aufirst=Poul&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Incorporating feedback uncertainties in a model-based assessment of equilibrium climate sensitivity using last glacial maximum temperature reconstructions AN - 1807508940; 2016-064619 AB - As the most recent period of large climate change, the Last Glacial Maximum (LGM) has been a useful target for analysis by model-data comparison. In addition, significant changes in greenhouse gas forcing across the last deglaciation and the relative wealth of LGM temperature reconstructions by proxy data provide a potentially useful opportunity to quantify equilibrium climate sensitivity (ECS), the change in global mean surface air temperature due to a doubling of atmospheric CO2. Past model-data comparisons have attempted to estimate ECS using the LGM climate in two ways: (1) scaling of proxy data with results from general circulation model intercomparisons, and (2) comparing data with results from an ensemble of ECS-tuned simulations using a single intermediate complexity model. While the first approach includes the complexity of climate feedbacks, the sample size of the ECS-space may be insufficiently large to assess climate sensitivity. However, the second approach may be model dependent by not adequately incorporating uncertainty in climate feedbacks. Here, we present a new LGM-based assessment of ECS using the latter approach along with a simple linear parameterization of the longwave and shortwave cloud feedbacks derived from the CMIP5/PMIP3 results applied to the University of Victoria Earth System intermediate complexity model (UVIC). Cloud feedbacks are found to be the largest source of variability among the CMIP5/PMIP3 simulations, and our parameterization emulates these feedbacks in the UVIC model. In using this parameterization, we present a new ensemble of UVIC simulations to estimate ECS based on a Bayesian comparison with LGM temperature reconstructions that determines a probability distribution of optimal overlap between data and model results. JF - American Geophysical Union Fall Meeting AU - Ullman, D J AU - Schmittner, A AU - Urban, N M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract PP43B EP - 2263 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508940?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Incorporating+feedback+uncertainties+in+a+model-based+assessment+of+equilibrium+climate+sensitivity+using+last+glacial+maximum+temperature+reconstructions&rft.au=Ullman%2C+D+J%3BSchmittner%2C+A%3BUrban%2C+N+M%3BAnonymous&rft.aulast=Ullman&rft.aufirst=D&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - A synthesis of the thermal state of the bed of the Greenland Ice Sheet AN - 1807508782; 2016-064495 AB - The thermal state of an ice sheet's bed (frozen or thawed) is an important control upon its history, present dynamics and future vulnerability to external forcings. However, this thermal state can only be either observed directly within sparse boreholes or inferred from the presence of subglacial lakes. Hence, indirect inferences of this state are required for the vast majority of an ice sheet. Here we synthesize new and existing spatially extensive inferences of the present thermal state of the bed of the Greenland Ice Sheet to better constrain this state, identify the most poorly constrained regions and inform ice-flow modeling. New remote inferences of this basal thermal state are derived from modeling of this ice sheet's radiostratigraphy, analysis of surface imagery and interpretation of surface-velocity patterns. Existing inferences include outputs from thermomechanical ice-flow models with varied spin-ups, forcings and underlying assumptions. Between similarly forced models, there is general agreement regarding the thermal state of the bed, except where this state transitions from frozen to thawed. Both observations and modeling generally agree that the Northeast Greenland Ice Stream (NEGIS) and significant portions of the southwestern ice-drainage basins are thawed at the bed, while the vicinities of central ice divides, particularly their west-facing slopes, are frozen. There is poor agreement regarding the basal thermal state within the NEGIS drainage basin outside of NEGIS itself, above nearly equal 2000 m surface elevation in the southern drainage basins and along the eastern ice-sheet margin. Further, remote inferences and modeling rarely represent the observed basal thermal state accurately at NorthGRIP, DYE-3 and near northeastern subglacial lakes. This synthesis identifies large regions of the Greenland Ice Sheet where additional observations could significantly improve assessment of its basal thermal state, and where the ice sheet is likely most sensitive to millennial-scale external forcings. Finally, we discuss the possible sources of disagreement between the observed and modeled basal thermal state. JF - American Geophysical Union Fall Meeting AU - MacGregor, J A AU - Fahnestock, M A AU - Catania, G A AU - Aschwanden, A AU - Clow, G D AU - Colgan, W T AU - Gogineni, P S AU - Morlighem, M AU - Paden, J D AU - Price, S F AU - Seroussi, H L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C42A EP - 05 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508782?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+synthesis+of+the+thermal+state+of+the+bed+of+the+Greenland+Ice+Sheet&rft.au=MacGregor%2C+J+A%3BFahnestock%2C+M+A%3BCatania%2C+G+A%3BAschwanden%2C+A%3BClow%2C+G+D%3BColgan%2C+W+T%3BGogineni%2C+P+S%3BMorlighem%2C+M%3BPaden%2C+J+D%3BPrice%2C+S+F%3BSeroussi%2C+H+L%3BAnonymous&rft.aulast=MacGregor&rft.aufirst=J&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Isotopic and geochemical fingerprinting of a polygonal Arctic ecosystem AN - 1807508585; 2016-066748 AB - Arctic tundra contain large C stocks and may be an important source of CO (sub 2) and CH (sub 4) over the next century due to a rapidly changing climate, degrading permafrost, and redistribution of water across high latitude landscapes. This presentation synthesizes geochemical and isotopic data and examines vertical and lateral factors and processes critical to predicting the C, N, and water balance of tundra ecosystems. Stable water isotope analyses (delta (super 2) H and delta (super 18) O) indicate that summer rain is the dominant source for active layer groundwater, with melting seasonal ice contributing to deeper pore waters in late summer. Microtopography and water table effects on geochemistry were apparent from a comprehensive spatial examination of active layer biogeochemistry, showing a number of significant differences in the concentrations of cations and anions for high- vs. low-centered polygons, microtopographic features (polygonal centers vs. troughs), and with depth. Results have implications for future nutrient availability with projected permafrost degradation and landscape evolution, suggesting greater availability of limiting nutrients (sulfate, phosphate, and nitrate) where polygons undergo a shift from low- to high-centered. Nitrate isotopes (delta (super 15) N and delta (super 18) O) indicated a predominantly microbial source for nitrate in high centered polygons active layers. However, atmospheric nitrate was preserved in permafrost, and may serve as a potential indicator of permafrost degradation. Additionally, results suggest that older, deeper C sources may be promoting a shift in methanogenic pathway, from predominantly acetoclastic to hydrogenotrophic. This mechanistic shift is attributed to the source and quality of available organic substrate. Overall, results showed substantial lateral and vertical variability in biogeochemical, biogeophysical, and hydrological processes across microtopographic- to landscape scales that needs to be accounted for in fine and intermediate scale models. JF - American Geophysical Union Fall Meeting AU - Throckmorton, H AU - Heikoop, J M AU - Newman, B D AU - Wilson, C J AU - Wullschleger, S D AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B51C EP - 0439 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508585?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Isotopic+and+geochemical+fingerprinting+of+a+polygonal+Arctic+ecosystem&rft.au=Throckmorton%2C+H%3BHeikoop%2C+J+M%3BNewman%2C+B+D%3BWilson%2C+C+J%3BWullschleger%2C+S+D%3BAnonymous&rft.aulast=Throckmorton&rft.aufirst=H&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Deformation and crystallographic preferred orientation of two-phase lower mantle mineral analogs; implications for seismic anisotropy in the lower mantle AN - 1807508379; 2016-066818 AB - Geodynamic models predict large strains due to convection in the mantle, and polycrystal plasticity simulations suggest strong crystallographic preferred orientation (CPO), yet much of the lower mantle is observed to be mostly isotropic. However, these models ignore interaction among phases, which is important for the lower mantle, estimated to be composed of nearly equal 25% soft ferropericlase (Mg,Fe)O and nearly equal 70% harder bridgmanite (MgSiO (sub 3) ). Here we consider deformation of these two lower mantle mineral phases together and look at the microstructure to find whether soft ferropericlase becomes interconnected and acts as a lubricant between harder bridgmanite grains or if ferropericlase is largely disconnected leaving deformation to be absorbed by bridgmanite. We quantify how the volume percent of ferropericlase might affect deformation and CPO development in the lower mantle. We deformed lower mantle mineral analogs halite (NaCl, ferropericlase structure) and neighborite (NaMgF (sub 3) , perovskite structure) together in the D-DIA. Development of CPO was recorded in situ with radial X-ray diffraction, and information on microstructural evolution was collected using X-ray microtomography. We performed self-consistent polycrystal plasticity modelling to infer likely slip systems and strain rates in each phase. Results show that when present in as little as 15% volume, the soft halite becomes interconnected during deformation, surrounding the harder neighborite grains. The change in microstructure during deformation coincides with a decrease in differential stress, i.e. weakening of the aggregate, and a reduction in CPO, likely due to a switch in deformation mode. Furthermore, polycrystal plasticity models imply much higher strain rates in the softer halite, suggesting it is absorbing the bulk of deformation. The halite does not develop significant CPO, and CPO in the neighborite is reduced by nearly half with addition of 15% volume halite. The results suggest that ferropericlase controls deformation in the lower mantle through a mechanism that does not produce significant CPO. This implies a more viscous lower mantle and helps to explain why the bulk of the lower mantle is fairly isotropic. JF - American Geophysical Union Fall Meeting AU - Kaercher, P M AU - Miyagi, L M AU - Kanitpanyacharoen, W AU - Zepeda-Alarcon, E AU - Wang, Y AU - Parkinson, D AU - Lebensohn, R AU - DeCarlo, F AU - Wenk, H R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract DI13C EP - 05 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508379?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Deformation+and+crystallographic+preferred+orientation+of+two-phase+lower+mantle+mineral+analogs%3B+implications+for+seismic+anisotropy+in+the+lower+mantle&rft.au=Kaercher%2C+P+M%3BMiyagi%2C+L+M%3BKanitpanyacharoen%2C+W%3BZepeda-Alarcon%2C+E%3BWang%2C+Y%3BParkinson%2C+D%3BLebensohn%2C+R%3BDeCarlo%2C+F%3BWenk%2C+H+R%3BAnonymous&rft.aulast=Kaercher&rft.aufirst=P&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Source parameters for repeating earthquakes along the Middle America Trench AN - 1807508152; 2016-067000 AB - Repeating earthquakes, with their similar locations and similar waveforms, are often thought to represent slip along the same patch of fault. Analysis of these earthquake clusters can provide useful information about the nature of the fault and earthquake interaction. Here we focus on sequences of repeating earthquakes along both the Nicoya Peninsula, Costa Rica and along the Oaxaca segment of Mexico, as both megathrust faults have been well instrumented in recent years with local seismic networks able to record the small magnitude earthquakes. These regions have also experienced large megathrust earthquakes as well as non-volcanic tremor and slow slip, suggesting a complex fault system that allows a wide spectrum of slip. We can use source characteristics of the repeating earthquakes to probe this fault complexity. Along the Nicoya Peninsula, there are over 370 repeating earthquakes (M 0.5-3.3) in the 3 months following the 2012 Mw 7.6 megathrust earthquake grouped into 55 distinct clusters. Along Oaxaca, the earthquake clusters or swarms (M 1.5-5.5) span a wider spatial and temporal range. For our source parameter calculations, we form narrow-frequency band envelopes for pairs of earthquakes within the earthquake clusters to compute spectral ratios for each pair. We determine seismic moment, corner frequency, and earthquake stress drop for each earthquake from these spectral ratios. We compare the source parameters for events within the clusters to examine temporal variations and compare between clusters to explore spatial variations that could be linked to other slip heterogeneity. Preliminary results for the Nicoya region suggest nearly identical stress drop for repeating events within clusters located near the 2012 mainshock, and more variability in stress drops for earthquakes in clusters located updip and to the northwest of the mainshock. JF - American Geophysical Union Fall Meeting AU - Bilek, Susan L AU - Phillips, W S AU - Walter, Jake I AU - Peng, Z AU - Schwartz, S Y AU - Brudzinski, M R AU - Yao, D AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S44A EP - 01 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508152?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Source+parameters+for+repeating+earthquakes+along+the+Middle+America+Trench&rft.au=Bilek%2C+Susan+L%3BPhillips%2C+W+S%3BWalter%2C+Jake+I%3BPeng%2C+Z%3BSchwartz%2C+S+Y%3BBrudzinski%2C+M+R%3BYao%2C+D%3BAnonymous&rft.aulast=Bilek&rft.aufirst=Susan&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - UAS-borne photogrammetry for surface topographic characterization; a ground-truth baseline for future change detection and refinement of scaled remotely-sensed datasets AN - 1807507902; 2016-064446 AB - While long-term objectives of monitoring and verification regimes include remote characterization and discrimination of surficial geologic and topographic features at sites of interest, ground truth data is required to advance development of remote sensing techniques. Increasingly, it is desirable for these ground-based or ground-proximal characterization methodologies to be as nimble, efficient, non-invasive, and non-destructive as their higher-altitude airborne counterparts while ideally providing superior resolution. For this study, the area of interest is an alluvial site at the Nevada National Security Site intended for use in the Source Physics Experiment's (Snelson et al., 2013) second phase. Ground-truth surface topographic characterization was performed using a DJI Inspire 1 unmanned aerial system (UAS), at very low altitude (< 5-30m AGL). 2D photographs captured by the standard UAS camera payload were imported into Agisoft Photoscan to create three-dimensional point clouds. Within the area of interest, careful installation of surveyed ground control fiducial markers supplied necessary targets for field collection, and information for model georectification. The resulting model includes a Digital Elevation Model derived from 2D imagery. It is anticipated that this flexible and versatile characterization process will provide point cloud data resolution equivalent to a purely ground-based LiDAR scanning deployment (e.g., 1-2 cm horizontal and vertical resolution; e.g., Sussman et al., 2012; Schultz-Fellenz et al., 2013). In addition to drastically increasing time efficiency in the field, the UAS method also allows for more complete coverage of the study area when compared to ground-based LiDAR. Comparison and integration of these data with conventionally-acquired airborne LiDAR data from a higher-altitude ( nearly equal 450m) platform will aid significantly in the refinement of technologies and detection capabilities of remote optical systems to identify and detect surface geologic and topographic signatures of interest. This work includes a preliminary comparison of surface signatures detected from varying standoff distances to assess current sensor performance and benefits. JF - American Geophysical Union Fall Meeting AU - Coppersmith, Ryan AU - Schultz-Fellenz, E S AU - Sussman, A J AU - Vigil, S AU - Dzur, R AU - Norskog, K AU - Kelley, R AU - Miller, L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B41D EP - 0464 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807507902?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=UAS-borne+photogrammetry+for+surface+topographic+characterization%3B+a+ground-truth+baseline+for+future+change+detection+and+refinement+of+scaled+remotely-sensed+datasets&rft.au=Coppersmith%2C+Ryan%3BSchultz-Fellenz%2C+E+S%3BSussman%2C+A+J%3BVigil%2C+S%3BDzur%2C+R%3BNorskog%2C+K%3BKelley%2C+R%3BMiller%2C+L%3BAnonymous&rft.aulast=Coppersmith&rft.aufirst=Ryan&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Quantifying subsurface geophysical properties changes using double-difference seismic-waveform inversion with a modified total-variation regularization scheme AN - 1803780016; 2016-060508 AB - Quantifying time-lapse changes of subsurface geophysical properties is crucial for many applications, such as monitoring for oil/gas production, for geologic carbon storage, and for enhanced geothermal systems, etc. We develop a new double-difference acoustic-waveform inversion method and a new double-difference elastic-waveform inversion method using a modified total-variation regularization scheme for accurate estimation of subsurface geophysical properties changes. The method jointly inverts time-lapse seismic data for changes of geophysical properties in target monitoring regions. Our new waveform inversion algorithms incorporate a modified total-variation regularization scheme consisting of two regularization terms: an L2 norm term and an L1 norm total-variation term. We employ an alternating minimization method to decouple our new waveform inversion with the modified total-variation regularization into two minimization subproblems to improve the robustness of waveform inversion. We use seismic-waveform inversion with a modified total-variation regularization scheme to produce an accurate baseline geophysical model using the baseline seismic data and apply our new double-difference seismic-waveform inversion to time-lapse seismic data to quantify time-lapse changes of geophysical properties. Our new double-difference waveform inversion algorithm not only preserves sharp interfaces of the target monitoring regions but also reduces inversion artefacts outside the target monitoring regions. We use synthetic time-lapse seismic data to validate the improvement of our new methods. Our numerical results show that our new double-difference acoustic- and elastic-waveform inversion methods significantly improve the accuracy of time-lapse seismic data inversion compared to other inversion methods. JF - Geophysical Journal International AU - Lin, Youzuo AU - Huang, Lianjie Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 2125 EP - 2149 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 203 IS - 3 SN - 0956-540X, 0956-540X KW - tomography KW - P-waves KW - body waves KW - monitoring KW - elasticity KW - double-difference method KW - numerical models KW - geophysical methods KW - inverse problem KW - elastic waves KW - fluid dynamics KW - seismic methods KW - reservoir rocks KW - models KW - mathematical methods KW - time-lapse methods KW - reservoir properties KW - seismic waves KW - algorithms KW - S-waves KW - faults KW - fault zones KW - 29A:Economic geology, geology of energy sources KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803780016?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Quantifying+subsurface+geophysical+properties+changes+using+double-difference+seismic-waveform+inversion+with+a+modified+total-variation+regularization+scheme&rft.au=Lin%2C+Youzuo%3BHuang%2C+Lianjie&rft.aulast=Lin&rft.aufirst=Youzuo&rft.date=2015-12-01&rft.volume=203&rft.issue=3&rft.spage=2125&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/ L2 - http://gji.oxfordjournals.org/content/203/3/2125.abstract http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 50 N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-07-14 N1 - SubjectsTermNotLitGenreText - algorithms; body waves; double-difference method; elastic waves; elasticity; fault zones; faults; fluid dynamics; geophysical methods; inverse problem; mathematical methods; models; monitoring; numerical models; P-waves; reservoir properties; reservoir rocks; S-waves; seismic methods; seismic waves; time-lapse methods; tomography ER - TY - JOUR T1 - Improved Bayesian infrasonic source localization for regional infrasound AN - 1803775621; 2016-060478 AB - The mathematical framework used in the Bayesian Infrasonic Source Localization (BISL) methodology is examined and simplified providing a generalized method of estimating the source location and time for an infrasonic event. The likelihood function describing an infrasonic detection used in BISL has been redefined to include the von Mises distribution developed in directional statistics and propagation-based, physically derived celerity-range and azimuth deviation models. Frameworks for constructing propagation-based celerity-range and azimuth deviation statistics are presented to demonstrate how stochastic propagation modelling methods can be used to improve the precision and accuracy of the posterior probability density function describing the source localization. Infrasonic signals recorded at a number of arrays in the western United States produced by rocket motor detonations at the Utah Test and Training Range are used to demonstrate the application of the new mathematical framework and to quantify the improvement obtained by using the stochastic propagation modelling methods. Using propagation-based priors, the spatial and temporal confidence bounds of the source decreased by more than 40 per cent in all cases and by as much as 80 per cent in one case. Further, the accuracy of the estimates remained high, keeping the ground truth within the 99 per cent confidence bounds for all cases. JF - Geophysical Journal International AU - Blom, Philip S AU - Marcillo, Omar AU - Arrowsmith, Stephen J Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 1682 EP - 1693 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 203 IS - 3 SN - 0956-540X, 0956-540X KW - United States KW - USArray KW - monitoring KW - numerical models KW - explosions KW - Bayesian analysis KW - Utah Test and Training Range KW - statistical analysis KW - data processing KW - elastic waves KW - seismicity KW - sensitivity analysis KW - mathematical methods KW - propagation KW - probability KW - Utah KW - seismic waves KW - algorithms KW - seismic networks KW - uncertainty KW - arrays KW - acoustical waves KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803775621?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Improved+Bayesian+infrasonic+source+localization+for+regional+infrasound&rft.au=Blom%2C+Philip+S%3BMarcillo%2C+Omar%3BArrowsmith%2C+Stephen+J&rft.aulast=Blom&rft.aufirst=Philip&rft.date=2015-12-01&rft.volume=203&rft.issue=3&rft.spage=1682&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/ L2 - http://gji.oxfordjournals.org/content/203/3/1682.abstract http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 42 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-07-14 N1 - SubjectsTermNotLitGenreText - acoustical waves; algorithms; arrays; Bayesian analysis; Comprehensive Test Ban Treaty; data processing; elastic waves; explosions; mathematical methods; monitoring; numerical models; probability; propagation; seismic networks; seismic waves; seismicity; sensitivity analysis; statistical analysis; uncertainty; United States; USArray; Utah; Utah Test and Training Range ER - TY - JOUR T1 - High-pressure, high-temperature deformation of CaGeO (sub 3) (perovskite)+ or -MgO aggregates; elasto-viscoplastic self-consistent modeling and implications for multi-phase rheology in the lower mantle AN - 1800397190; 2016-058018 AB - As the largest rocky layer in the Earth, the lower mantle plays a critical role in controlling convective patterns in our planet. Current mineralogical models suggest that the lower mantle is dominated by (Mg,Fe)SiO3 perovskite (SiPv; about 70-90% in volume fraction) and (Mg,Fe)O ferropericlase (Fp). Knowledge of rheological properties and textures of the major constituent minerals is critical in understanding dynamic processes of the deep Earth, and relating seismic observations to mineralogy. While individual properties of these phases have been studied, fewer informations on polyphase aggregates are available. Fundamental understanding about the stress-strain interactions among the phases and their effect on the bulk rheology still remains to be properly addressed. We examine stress/strain partitioning and rheological properties of a two-phase polycrystal CaGeO3 perovskite (GePv) and MgO, deformed in the D-DIA at controlled speed approximately 1-3X10 (super -5) s (super -1) at high pressures and temperatures (between 3 to 10 GPa and 300 to 1200 K), with bulk axial strains up to approximately 30%. We use Elasto-Visco Plastic Self-Consistent modeling (EVPSC) to reproduce lattice strains and textures measured in-situ with synchrotron X-ray diffraction. We compare the results to those on an identical deformation experiment with a single phase (GePv) polycrystal. We will discuss stress distributions between the two phases in the composite, texture developments, relationships with active slip systems, and finally the implications for rheological and seismic properties of the lower mantle. JF - American Geophysical Union Fall Meeting AU - Hilairet, Nadege AU - Tome, C AU - Wang, Huamiaow AU - Wang, Y AU - Gasc, J AU - Shi, F AU - Nishiyama, Norimasa AU - Merkel, Sebastien AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR22A EP - 04 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800397190?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=High-pressure%2C+high-temperature+deformation+of+CaGeO+%28sub+3%29+%28perovskite%29%2B+or+-MgO+aggregates%3B+elasto-viscoplastic+self-consistent+modeling+and+implications+for+multi-phase+rheology+in+the+lower+mantle&rft.au=Hilairet%2C+Nadege%3BTome%2C+C%3BWang%2C+Huamiaow%3BWang%2C+Y%3BGasc%2C+J%3BShi%2C+F%3BNishiyama%2C+Norimasa%3BMerkel%2C+Sebastien%3BAnonymous&rft.aulast=Hilairet&rft.aufirst=Nadege&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Improving estimation of microseismic focal mechanisms using a high-resolution velocity model AN - 1800396854; 2016-058443 AB - Injection and migration of CO2 during the geological carbon sequestration change the pore pressure and stress distribution in the reservoir. The change in stress may induce brittle failure on fractures, causing microseismic events. Focal mechanisms of induced microseismic events are useful for understanding stress evolution in the reservoir. An accurate estimation of microseismic focal mechanism depends on the accuracy of velocity models. In this work, we study the improvement on estimation of microseismic focal mechanisms using a high-resolution velocity model. We obtain the velocity model using a velocity inversion algorithm with a modified total-variation scheme rather than the commonly used Tikhonov regularization technique. We demonstrate with synthetic microseismic data that the velocity inversion method with a modified total-variation regularization scheme improves velocity inversion, and the improved velocity models enhance the accuracy of estimated focal mechanisms of microseismic events. We apply the new methodology to microseismic data acquired at a CO2-EOR (enhanced oil recovery) site at Aneth, Utah. JF - American Geophysical Union Fall Meeting AU - Chen, T AU - Chen, Y AU - Lin, Y AU - Huang, L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S24A EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800396854?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Improving+estimation+of+microseismic+focal+mechanisms+using+a+high-resolution+velocity+model&rft.au=Chen%2C+T%3BChen%2C+Y%3BLin%2C+Y%3BHuang%2C+L%3BAnonymous&rft.aulast=Chen&rft.aufirst=T&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - East Asia regionalization based on receiver functions AN - 1800396280; 2016-058388 AB - We present here a first step toward a model of the seismic velocity structure through stochastic full waveform tomography of East Asia. Such inversion typically requires exploring thousands of variations of each parameter that is inverted to ensure reliable probabilistic inferences. Here we explore regionalization in order to reduce the dimension of the parameter space and identify regions with similar seismic characteristics that can be treated as a common block in the subsequent stochastic inversion. We follow the approach of Lekic and Romanowicz (2011) in which regionalization is performed through a cluster analysis of tomographic velocity models. Our analysis is based on teleseismic P-wave Receiver Functions (RFTNs) instead. We apply a K-means algorithm minimizing a distance metrics defined in the vector space of RFTNs. Different metrics have been tested to optimize the clustering. Coherence and association with known tectonic and physiographic features and/or established geophysical information is also tested. We first validate our clustering analysis with two different receiver functions datasets from USArray stations. A first set was built by stacking EARS receiver functions for each available station across all azimuths and with a Gaussian filter width of 2.5 Hz and small ray parameters (0.038 to 0.05 s/km). The second dataset was built by interpolation of the receiver function wavefield (Chai et al., 2015). The agreement with geological and tectonic regions of western US is better for the latter dataset. Our future inversion region is East Asia where remarkable instrumentation efforts open the door to high-resolution tomography studies at the continental scale. Our collaborators provided teleseismic P-wave receiver functions for 785 stations. Clustering results show agreement with known tectonic features of the area, and we will show our attempts of regionalization based on this information. JF - American Geophysical Union Fall Meeting AU - Larmat, C S AU - Maceira, M AU - Romanowicz, B A AU - Chai, C AU - Ammon, C J AU - Zhang, H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S23C EP - 2733 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800396280?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=East+Asia+regionalization+based+on+receiver+functions&rft.au=Larmat%2C+C+S%3BMaceira%2C+M%3BRomanowicz%2C+B+A%3BChai%2C+C%3BAmmon%2C+C+J%3BZhang%2C+H%3BAnonymous&rft.aulast=Larmat&rft.aufirst=C&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Velocity structure of the Iran region using seismic and gravity observations AN - 1800396230; 2016-058392 AB - We present a 3D Vp and Vs model of Iran generated using a joint inversion of body wave travel times, Rayleigh wave dispersion curves, and high-wavenumber filtered Bouguer gravity observations. Our work has two main goals: 1) To better understand the tectonics of a prominent example of continental collision, and 2) To assess the improvements in earthquake location possible as a result of joint inversion. The body wave dataset is mainly derived from previous work on location calibration and includes the first-arrival P and S phases of 2500 earthquakes whose initial locations qualify as GT25 or better. The surface wave dataset consists of Rayleigh wave group velocity measurements for regional earthquakes, which are inverted for a suite of period-dependent Rayleigh wave velocity maps prior to inclusion in the joint inversion for body wave velocities. We use gravity anomalies derived from the global gravity model EGM2008. To avoid mapping broad, possibly dynamic features in the gravity field into variations in density and body wave velocity, we apply a high-pass wavenumber filter to the gravity measurements. We use a simple, approximate relationship between density and velocity so that the three datasets may be combined in a single inversion. The final optimized 3D Vp and Vs model allows us to explore how multi-parameter tomography addresses crustal heterogeneities in areas of limited coverage and improves travel time predictions. We compare earthquake locations from our models to independent locations obtained from InSAR analysis to assess the improvement in locations derived in a joint-inversion model in comparison to those derived in a more traditional body-wave-only velocity model. JF - American Geophysical Union Fall Meeting AU - Syracuse, E M AU - Maceira, M AU - Phillips, W S AU - Begnaud, M L AU - Nippress, S E J AU - Bergman, E AU - Zhang, H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S23C EP - 2737 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800396230?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Velocity+structure+of+the+Iran+region+using+seismic+and+gravity+observations&rft.au=Syracuse%2C+E+M%3BMaceira%2C+M%3BPhillips%2C+W+S%3BBegnaud%2C+M+L%3BNippress%2C+S+E+J%3BBergman%2C+E%3BZhang%2C+H%3BAnonymous&rft.aulast=Syracuse&rft.aufirst=E&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Ocean-based seismic noise sources recorded by a moderate aperture array in Antarctica AN - 1800395959; 2016-055736 AB - The deployment of a temporary, 60 km aperture, broadband seismic array on the Whillans Ice Stream (WIS), West Antarctica provides an opportunity to analyze ocean-derived seismic noise sources. The location of Antarctica, surrounded by the Southern Ocean and the seasonal effect of sea ice on shallow water noise production, allows for an intriguing experiment as to the production of primary and secondary microseisms. The WIS array was deployed for 2 months between December 2010-January 2011 with its primary objective to study WIS stick-slip events and glacial microseismicity. However, daylong stacks of station-to-station correlograms show directionality of the ambient noise field within the frequency bands of the primary and secondary microseisms. Although the WIS array is located close to the grounding line, it lies 700 km from the nearest open water at the end of the austral summer. The array consists of 17 broadband stations arranged in a series of offset concentric circles that minimizes spatial artifacts with regards to the array response. We use beamforming analysis to show that primary microseisms ( nearly equal 15 s) are sourced from three azimuthal directions with some ice-free coastline: Antarctic Peninsula, Victoria Land, and Dronning-Maude Land. Long-period secondary microseisms ( nearly equal 10 s) appear to be sourced in the deep Southern Ocean and track storm systems. Short-period secondary microseisms ( nearly equal 6 s) show much more dependence on the continental shelf and possibly coastal reflections. This is consistent with year-long noise spectra showing diminishment in the 15 s and 6 s bands [Grob et al. 2011]. Modeling of secondary microseism sources [Ardhuin et al. 2011] provides insight on the sources of surface wave noise at higher frequencies. We backproject daily P and PKPbc body wave microseism signals found at lower ray parameters sourced at distances of nearly equal 20-90 degrees and nearly equal 145-155 degrees respectively. The ocean sources for these arrivals remain fairly consistent, suggesting a bathymetric control, although the signal power increases with the passing of storm systems. We conclude that both 15 s primary microseisms and 6 s secondary microseisms at surface wave slownesses are generated in shallow coastal regions, but 10 s microseisms and noise with body wave slownesses are largely generated in deeper oceanic regions. JF - American Geophysical Union Fall Meeting AU - Pratt, M J AU - Winberry, J P AU - Wiens, D AU - Anandakrishnan, S AU - Euler, G G AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S31C EP - 02 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800395959?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Ocean-based+seismic+noise+sources+recorded+by+a+moderate+aperture+array+in+Antarctica&rft.au=Pratt%2C+M+J%3BWinberry%2C+J+P%3BWiens%2C+D%3BAnandakrishnan%2C+S%3BEuler%2C+G+G%3BAnonymous&rft.aulast=Pratt&rft.aufirst=M&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - On the development and testing of a database-centric pipeline for the analysis of a regional infrasound network AN - 1797541457; 2016-050913 AB - We are developing a database-centric pipeline for the analysis of data from a regional network of infrasound arrays. The pipeline includes analysis at station and network levels (using beam-forming and clustering techniques, respectively) for the detection, association and location of events. The pipeline relies on the interaction of the algorithms with a relational database structure to organize and store waveform data, the parameters for the analysis, and results of both levels of analysis. Our implementation can interact seamlessly with traditional (e.g.: Oracle) and serverless (e.g.: SQLite) relational databases. Data from nine infrasonic arrays co-located with University of Utah Seismograph Stations, three additional arrays in Nevada, operated by Southern Methodist University, and IMS arrays at IS56 in Washington State and IS57 in California are used to test the operation of the pipeline, the algorithms, and the sensitivity of the results to the parameters of the analysis JF - American Geophysical Union Fall Meeting AU - Marcillo, O E AU - Blom, P S AU - Euler, G G AU - MacCarthy, J AU - Park, J AU - Stump, B W AU - Hayward, C AU - Dannemann, Fransiska K AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51C EP - 2691 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797541457?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=On+the+development+and+testing+of+a+database-centric+pipeline+for+the+analysis+of+a+regional+infrasound+network&rft.au=Marcillo%2C+O+E%3BBlom%2C+P+S%3BEuler%2C+G+G%3BMacCarthy%2C+J%3BPark%2C+J%3BStump%2C+B+W%3BHayward%2C+C%3BDannemann%2C+Fransiska+K%3BAnonymous&rft.aulast=Marcillo&rft.aufirst=O&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Detection of regional infrasound signals using array data; testing, tuning, and physical interpretation AN - 1797539854; 2016-050919 AB - In order to understand the impact environmental conditions have on infrasound detection, an automated detector that accounts for both correlated and uncorrelated noise is run on data from a number of infrasonic arrays, all in a regional context. Data from six seismo-acoustic arrays in South Korea (BRDAR, CHNAR, KMPAR, KSGAR, TJIAR, and YPDAR), which are cooperatively operated by Korea Institute of Geoscience and Mineral Resources (KIGAM) and Southern Methodist University (SMU), were used. An adaptive F-detector (AFD) (Arrowsmith et al., 2009) is applied that utilizes the F-statistic (Blandford, 1974) with an adaptive procedure that assesses variations in coherent noise in order to reduce false alarms. The adaptive procedure is characterized by the time dependent C-value that is found to depend on the weather conditions and local site effects. Arrays located on islands or near the coast produce noise power densities that are higher, consistent with both higher wind speeds as well as ocean wave contributions that vary seasonally. These results suggest that optimal detection processing requires careful characterization of background noise level and its relationship to enviornmental measures at individual arrays. This study also documents significant seasonal variations in infrasound detections including daily time of occurrence, total number of detections, and phase velocity/azimuth estimates. These time-dependent effects in most part explained by atmospheric models across the Korean peninsula as described by Drob et al. (2003). JF - American Geophysical Union Fall Meeting AU - Park, J AU - Stump, B W AU - Hayward, C AU - Arrowsmith, S AU - Che, I Y AU - Drob, D P AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51C EP - 2697 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797539854?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Detection+of+regional+infrasound+signals+using+array+data%3B+testing%2C+tuning%2C+and+physical+interpretation&rft.au=Park%2C+J%3BStump%2C+B+W%3BHayward%2C+C%3BArrowsmith%2C+S%3BChe%2C+I+Y%3BDrob%2C+D+P%3BAnonymous&rft.aulast=Park&rft.aufirst=J&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterizing explosive eruptions at Sakurajima Volcano, Japan, using seismic, infrasound, lightning and video data AN - 1797539690; 2016-050928 AB - The ability to determine volcanic ash plume characteristics from seismic and/or infrasonic records would enable increased accuracy in volcanic monitoring during times of low visibility. During May-June 2015 a field deployment of 6 infrasound sensors, 2 seismometers, multiple cameras, and 10 Lightning Mapping Array (LMA) stations were deployed around Sakurajima Volcano in Japan. During one month of observations (13 May to 10 June) hundreds of explosive eruptions were observed with plume heights reaching 4.3 km above the vent. The plumes varied in duration, ash content, and physical form. The resulting explosions exhibited a variety of infrasound waveforms including the classic long-period N shape as well as events with a mixture of high and low frequencies. For a subset of larger events, peak pressures ranged from 16 to 741 Pa at a distance of 3.6 km from the vent. The seismic signals are long period and emergent with no clear P or S-waves, although high frequency ground-coupled airwaves are visible in conjunction with the infrasonic record of some of the explosive eruptions. Peak ground displacements on the vertical component ranged from 2.1 to 183 um for the same subset of events. Volcanic lightning was both visually observed and recorded on the LMA stations. One of the goals of this project to determine if there are intrinsic relationships between ash plume characteristics, such as initial velocity or acceleration, ash grain size, texture, and composition, seismic and infrasound waveforms, and the presence and type of volcanic lightning. The rich variety of observations provides a good opportunity to determine such relationships. JF - American Geophysical Union Fall Meeting AU - Smith, C M AU - Behnke, S A AU - Thomas, R J AU - Edens, H E AU - Cimarelli, C AU - Cigala, V AU - Van Eaton, A R AU - Iguchi, M AU - Miki, D AU - McNutt, S R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51D EP - 2706 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797539690?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterizing+explosive+eruptions+at+Sakurajima+Volcano%2C+Japan%2C+using+seismic%2C+infrasound%2C+lightning+and+video+data&rft.au=Smith%2C+C+M%3BBehnke%2C+S+A%3BThomas%2C+R+J%3BEdens%2C+H+E%3BCimarelli%2C+C%3BCigala%2C+V%3BVan+Eaton%2C+A+R%3BIguchi%2C+M%3BMiki%2C+D%3BMcNutt%2C+S+R%3BAnonymous&rft.aulast=Smith&rft.aufirst=C&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geophysics, remote sensing, and the Comprehensive Nuclear-Test-Ban Treaty (CTBT) integrated field exercise 2014 AN - 1797538999; 2016-050999 AB - The Integrated Field Exercise of 2014 (IFE14) was an event held in the Hashemite Kingdom of Jordan (with concurrent activities in Austria) that tested the operational and technical capabilities of an on-site inspection (OSI) within the CTBT verification regime. During an OSI, up to 40 international inspectors will search an area for evidence of a nuclear explosion. Over 250 experts from approximately 50 countries were involved in IFE14 (the largest simulation of a real OSI to date) and worked from a number of different directions, such as the Exercise Management and Control Teams (which executed the scenario in which the exercise was played) and those participants performing as members of the Inspection Team (IT). One of the main objectives of IFE14 was to test and integrate Treaty allowed inspection techniques, including a number of geophysical and remote sensing methods. In order to develop a scenario in which the simulated exercise could be carried out, suites of physical features in the IFE14 inspection area were designed and engineered by the Scenario Task Force (STF) that the IT could detect by applying the geophysical and remote sensing inspection technologies, in addition to other techniques allowed by the CTBT. For example, in preparation for IFE14, the STF modeled a seismic triggering event that was provided to the IT to prompt them to detect and localize aftershocks in the vicinity of a possible explosion. Similarly, the STF planted shallow targets such as borehole casings and pipes for detection using other geophysical methods. In addition, airborne technologies, which included multi-spectral imaging, were deployed such that the IT could identify freshly exposed surfaces, imported materials, and other areas that had been subject to modification. This presentation will introduce the CTBT and OSI, explain the IFE14 in terms of the goals specific to geophysical and remote sensing methods, and show how both the preparation for and execution of IFE14 meet those goals. JF - American Geophysical Union Fall Meeting AU - Sussman, A J AU - Macleod, G AU - Labak, P AU - Malich, G AU - Rowlands, A P AU - Craven, J AU - Sweeney, J J AU - Chiappini, M AU - Tuckwell, G AU - Sankey, Peter AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S52B EP - 07 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538999?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geophysics%2C+remote+sensing%2C+and+the+Comprehensive+Nuclear-Test-Ban+Treaty+%28CTBT%29+integrated+field+exercise+2014&rft.au=Sussman%2C+A+J%3BMacleod%2C+G%3BLabak%2C+P%3BMalich%2C+G%3BRowlands%2C+A+P%3BCraven%2C+J%3BSweeney%2C+J+J%3BChiappini%2C+M%3BTuckwell%2C+G%3BSankey%2C+Peter%3BAnonymous&rft.aulast=Sussman&rft.aufirst=A&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Organic matter controls on iodine and plutonium in atmospheric depositions, streams, and soils in the Fukushima Prefecture AN - 1797538404; 2016-053254 AB - In order to assess how environmental factors are controlling the distribution and migration of radioiodine and plutonium that were emitted from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, we quantified iodine and (super 239,240) Pu concentration changes in soil samples with different land uses (urban, paddy, deciduous forest and coniferous forest), as well as iodine speciation in surface water and rainwater. A ranking of the land uses by their stable (super 127) I and by their (super 239,240) Pu concentrations were quite distinct from that of (super 134,137) Cs, indicating (super 137) Cs might not be a good geochemical proxy for radioactive (super 129) I or Pu in the long-term, post-FDNPP accident. Being a proxy for the long-term fate of (super 129) I, soil (super 127) I content was well correlated to soil organic matter (SOM) content, regardless of land use type, suggesting that SOM might be an important factor controlling iodine biogeochemistry. Other soil chemical properties, such as Eh and pH, had strong correlations to soil (super 127) I content, but only within a given land use (e.g., within urban soils). Organic carbon (OC) and Eh were positively, and pH was negatively correlated to (super 127) I concentrations in surface water and rain samples. It is also noticeable that (super 127) I in the bulk deposition was concentrated along the rainwater passage likely due to plant evapotranspiration activity, with all inorganic iodine being completely converted to organo-iodine by plant organic matter. (super 239,240) Pu activities of all soil samples were well within the global fallout range, but the Fukushima-derived (super 239,240) Pu was detectable at a distance nearly equal 61 km away, NW of FDNPP. However, it is confined to the litter layer, even three years after the FDNPP accident-derived emissions. (super 239,240) Pu activities were significantly correlated with soil OC and nitrogen contents, indicating Pu may be associated with nitrogen-containing SOM, similar to what has been observed at other locations in the United States, e.g., Savannah River Site (SRS) and Rocky Flats Environmental Technology Site (RFETS). Together, these finding suggest that NOM plays an key role in controlling the fate and transport of I and Pu and may warrant greater consideration for predicting long-term stewardship of contaminated areas and evaluating various remediation options in Japan. JF - American Geophysical Union Fall Meeting AU - Xu, C AU - Zhang, S AU - Sugiyama, Y AU - Ohte, N AU - Ho, Y F AU - Fujitake, N AU - Kaplan, D I AU - Yeager, C M AU - Schwehr, K A AU - Santschi, P H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B13A EP - 0599 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538404?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Organic+matter+controls+on+iodine+and+plutonium+in+atmospheric+depositions%2C+streams%2C+and+soils+in+the+Fukushima+Prefecture&rft.au=Xu%2C+C%3BZhang%2C+S%3BSugiyama%2C+Y%3BOhte%2C+N%3BHo%2C+Y+F%3BFujitake%2C+N%3BKaplan%2C+D+I%3BYeager%2C+C+M%3BSchwehr%2C+K+A%3BSantschi%2C+P+H%3BAnonymous&rft.aulast=Xu&rft.aufirst=C&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Ice wedge degradation; why Arctic lowlands are becoming wetter and drier AN - 1797538401; 2016-053338 AB - Top melting of ice-wedges and subsequent ground subsidence is now a widespread phenomenon across the Arctic domain. We show field and remote sensing observations that document extensive ice-wedge degradation, which initially has resulted in increased wetness contrast across the landscape (i.e. both a drying and a wetting), a shift in pond type and an overall drying in later stages. The differential ground subsidence at cold continuous permafrost regions appear to be linked to press and pulse climate forcing. Here, the process of crossing the local threshold for ice-wedge stability may be favored by a press occurrence such as long-term, gradual increases in summer air temperature, mean annual air temperature and/or possibly winter precipitation, but our observations suggest it is most likely initiated by pulse atmospheric forcing such as extreme summer warmth and/or winter precipitation. Field measurements of water levels, frost tables and snow accumulation across the main ice-wedge polygon types and their respective features support dramatic shifts in the hydrologic regime with altered topography and a complexity that ultimately affect the larger-scale hydrologic system. For example, our numerical model experiments show that a connected trough-network reduces inundation and increases runoff and that changing patterns of snow distribution due to the differential ground subsidence play a crucial role in altering lowland tundra water balance. These fine-scale (10's cm) geomorphic changes are expected to further expand and amplify in rapidly warming permafrost regions and likely will dramatically modify land-atmosphere and land-ocean fluxes and exchange of carbon, water, and energy. JF - American Geophysical Union Fall Meeting AU - Liljedahl, A K AU - Boike, J AU - Daanen, R P AU - Fedorov, A N AU - Frost, G V, Jr AU - Grosse, G AU - Hinzman, L D AU - Iijima, Y AU - Jorgenson, J AU - Matveyeva, N AU - Necsoiu, M AU - Raynolds, M K AU - Romanovsky, V E AU - Schulla, J AU - Tape, K D AU - Walker, D A AU - Wilson, C J AU - Yabuki, H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C21C EP - 0749 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538401?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Ice+wedge+degradation%3B+why+Arctic+lowlands+are+becoming+wetter+and+drier&rft.au=Liljedahl%2C+A+K%3BBoike%2C+J%3BDaanen%2C+R+P%3BFedorov%2C+A+N%3BFrost%2C+G+V%2C+Jr%3BGrosse%2C+G%3BHinzman%2C+L+D%3BIijima%2C+Y%3BJorgenson%2C+J%3BMatveyeva%2C+N%3BNecsoiu%2C+M%3BRaynolds%2C+M+K%3BRomanovsky%2C+V+E%3BSchulla%2C+J%3BTape%2C+K+D%3BWalker%2C+D+A%3BWilson%2C+C+J%3BYabuki%2C+H%3BAnonymous&rft.aulast=Liljedahl&rft.aufirst=A&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Real-time realizations of the bayesian infrasonic source localization method AN - 1797538315; 2016-050917 AB - The Bayesian Infrasonic Source Localization method (BISL), introduced by Mordak et al. (2010) and upgraded by Marcillo et al. (2014) is destined for the accurate estimation of the atmospheric event origin at local, regional and global scales by the seismic and infrasonic networks and arrays. The BISL is based on probabilistic models of the source-station infrasonic signal propagation time, picking time and azimuth estimate merged with a prior knowledge about celerity distribution. It requires at each hypothetical source location, integration of the product of the corresponding source-station likelihood functions multiplied by a prior probability density function of celerity over the multivariate parameter space. The present BISL realization is generally time-consuming procedure based on numerical integration. The computational scheme proposed simplifies the target function so that integrals are taken exactly and are represented via standard functions. This makes the procedure much faster and realizable in real-time without practical loss of accuracy. The procedure executed as PYTHON-FORTRAN code demonstrates high performance on a set of the model and real data. JF - American Geophysical Union Fall Meeting AU - Pinsky, V AU - Arrowsmith, S AU - Hofstetter, A AU - Nippress, A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51C EP - 2695 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538315?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Real-time+realizations+of+the+bayesian+infrasonic+source+localization+method&rft.au=Pinsky%2C+V%3BArrowsmith%2C+S%3BHofstetter%2C+A%3BNippress%2C+A%3BAnonymous&rft.aulast=Pinsky&rft.aufirst=V&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Developing path-dependent uncertainty estimates for use with the regional seismic travel time (RSTT) model AN - 1797538257; 2016-050978 AB - The Regional Seismic Travel Time (RSTT) tomography model has been developed to improve travel time predictions for regional phases (Pn, Sn, Pg, Lg) in order to increase seismic location accuracy. The RSTT model is specifically designed to exploit regional phases for location, especially when combined with teleseismic arrivals. The latest RSTT model (version 201404) has been released (http://www.sandia.gov/rstt). Travel time uncertainty estimates for RSTT are determined using one-dimensional (1D), distance-dependent error models, that have the benefit of being very fast to use in standard location algorithms, but do not account for path-dependent variations in error, and structural inadequacy of the RSTTT model (e.g., model error). Although global in extent, the RSTT tomography model is only defined in areas where data exist. A simple 1D error model does not accurately model areas where RSTT has not been calibrated. We are developing and investigating a new covariance matrix for RSTT phase arrivals by mathematically deriving this multivariate error model directly from a unified model of RSTT embedded into a statistical random effects model that captures distance, path and model error effects. An initial method developed is a two-dimensional path-distributed method using residuals. Other methods include a complete random-effects model and the calculation of the full model covariance matrix from the RSTT tomographic inversion. The goals for any RSTT uncertainty method are for it to be both readily useful for the standard RSTT user as well as improve travel time uncertainty estimates for location. JF - American Geophysical Union Fall Meeting AU - Begnaud, M L AU - Anderson, D N AU - Phillips, W S AU - Ballard, S AU - Myers, S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51F EP - 02 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538257?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Developing+path-dependent+uncertainty+estimates+for+use+with+the+regional+seismic+travel+time+%28RSTT%29+model&rft.au=Begnaud%2C+M+L%3BAnderson%2C+D+N%3BPhillips%2C+W+S%3BBallard%2C+S%3BMyers%2C+S%3BAnonymous&rft.aulast=Begnaud&rft.aufirst=M&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - The first long-term and continuous measurements of firn mass-balance and compaction on the Greenland Ice Sheet AN - 1797532890; 2016-053355 AB - Direct, continuous measurements of ice sheet surface mass balance are lacking, particularly in the accumulation zone where the surface snow and firn varies in density. Nearly all of our knowledge of surface mass variability comes from snow pit and ice core stratigraphy, providing annual resolution with relatively large uncertainties that are inadequate for constraining meteorological models. Further, little information is available on how the density of the firn layer changes with time, hampering efforts to estimate mass change from altimetry measurements. Since the spring of 2012 we have obtained continuous measurements of changes in firn column density and, since spring 2015, mass balance at multiple sites in the percolation zone of the Jakobshavn Isbrae catchment in western Greenland. Surface mass balance is obtained from both snow scale and cosmic ray sensors, providing cross-validation. Following a description of the multiple technologies employed, we assess variations in compaction and surface mass balance in relation to meteorological variables. We then compare our measurements to model estimates and conclude with recommendations for continued and expanded observational activities. JF - American Geophysical Union Fall Meeting AU - Howat, I M AU - Behar, A AU - de la Pena, S AU - Price, S F AU - Desilets, D AU - Crowell, James M AU - Thanga, J AU - Womack, G AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C22B EP - 08 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797532890?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+first+long-term+and+continuous+measurements+of+firn+mass-balance+and+compaction+on+the+Greenland+Ice+Sheet&rft.au=Howat%2C+I+M%3BBehar%2C+A%3Bde+la+Pena%2C+S%3BPrice%2C+S+F%3BDesilets%2C+D%3BCrowell%2C+James+M%3BThanga%2C+J%3BWomack%2C+G%3BAnonymous&rft.aulast=Howat&rft.aufirst=I&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Time-dependent moment tensors of the first four source physics experiments (SPE) explosions AN - 1793207297; 2016-046736 AB - We use mainly vertical-component geophone data within 2 km from the epicenter to invert for time-dependent moment tensors of the first four SPE explosions: SPE-1, SPE-2, SPE-3 and SPE-4Prime. We employ a one-dimensional (1D) velocity model developed from P- and Rg-wave travel times for Green's function calculations. The attenuation structure of the model is developed from P- and Rg-wave amplitudes. We select data for the inversion based on the criterion that they show consistent travel times and amplitude behavior as those predicted by the 1D model. Due to limited azimuthal coverage of the sources and the mostly vertical-component-only nature of the dataset, only long-period, diagonal components of the moment tensors are well constrained. Nevertheless, the moment tensors, particularly their isotropic components, provide reasonable estimates of the long-period source amplitudes as well as estimates of corner frequencies, albeit with larger uncertainties. The estimated corner frequencies, however, are consistent with estimates from ratios of seismogram spectra from different explosions. These long-period source amplitudes and corner frequencies cannot be fit by classical P-wave explosion source models. The results motivate the development of new P-wave source models suitable for these chemical explosions. To that end, we fit inverted moment-tensor spectra by modifying the classical explosion model using regressions of estimated source parameters. Although the number of data points used in the regression is small, the approach suggests a way for the new-model development when more data are collected. JF - American Geophysical Union Fall Meeting AU - Yang, X AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2800 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207297?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Time-dependent+moment+tensors+of+the+first+four+source+physics+experiments+%28SPE%29+explosions&rft.au=Yang%2C+X%3BAnonymous&rft.aulast=Yang&rft.aufirst=X&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Large-N seismic deployment at the source physics experiment (SPE) site AN - 1793207239; 2016-046763 AB - The Source Physics Experiment (SPE) is multi-institutional and multi-disciplinary project that consists of a series of chemical explosion experiments at the Nevada National Security Site. The goal of SPE is to understand the complicated effect of earth structures on source energy partitioning and seismic wave propagation, develop and validate physics-based monitoring, and ultimately better discriminate low-yield nuclear explosions from background seismicity. Deployment of a large number of seismic sensors is planned for SPE to image the full 3-D wavefield with about 500 three-component sensors and 500 vertical component sensors. This large-N seismic deployment will operate near the site of SPE-5 shot for about one month, recording the SPE-5 shot, ambient noise, and additional controlled-sources. This presentation focuses on the design of the large-N seismic deployment. We show how we optimized the sensor layout based on the geological structure and experiment goals with a limited number of sensors. In addition, we will also show some preliminary record sections from deployment. This work was conducted under Contract No. DE-AC52-06NA25946 with the U.S. Department of Energy. JF - American Geophysical Union Fall Meeting AU - Chen, T AU - Snelson, C M AU - Mellors, R J AU - Pitarka, A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2827 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207239?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Large-N+seismic+deployment+at+the+source+physics+experiment+%28SPE%29+site&rft.au=Chen%2C+T%3BSnelson%2C+C+M%3BMellors%2C+R+J%3BPitarka%2C+A%3BAnonymous&rft.aulast=Chen&rft.aufirst=T&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Airborne and ground-based optical characterization of legacy underground nuclear test sites AN - 1793207188; 2016-046754 AB - Detecting, locating, and characterizing suspected underground nuclear test sites is a U.S. security priority. Currently, global underground nuclear explosion monitoring relies on seismic and infrasound sensor networks to provide rapid initial detection of potential underground nuclear tests. While seismic and infrasound might be able to generally locate potential underground nuclear tests, additional sensing methods might be required to further pinpoint test site locations. Optical remote sensing is a robust approach for site location and characterization due to the ability it provides to search large areas relatively quickly, resolve surface features in fine detail, and perform these tasks non-intrusively. Optical remote sensing provides both cultural and surface geological information about a site, for example, operational infrastructure, surface fractures. Surface geological information, when combined with known or estimated subsurface geologic information, could provide clues concerning test parameters. We have characterized two legacy nuclear test sites on the Nevada National Security Site (NNSS), U20ak and U20az using helicopter-, ground- and unmanned aerial system-based RGB imagery and light detection and ranging (lidar) systems. The multi-faceted information garnered from these different sensing modalities has allowed us to build a knowledge base of how a nuclear test site might look when sensed remotely, and the standoff distances required to resolve important site characteristics. JF - American Geophysical Union Fall Meeting AU - Vigil, S AU - Craven, J AU - Anderson, D AU - Dzur, R AU - Schultz-Fellenz, E S AU - Sussman, A J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2818 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207188?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Airborne+and+ground-based+optical+characterization+of+legacy+underground+nuclear+test+sites&rft.au=Vigil%2C+S%3BCraven%2C+J%3BAnderson%2C+D%3BDzur%2C+R%3BSchultz-Fellenz%2C+E+S%3BSussman%2C+A+J%3BAnonymous&rft.aulast=Vigil&rft.aufirst=S&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Comparison of reduced displacement potentials from SPE free field measurements; SPE-4Prime versus previous events AN - 1793207182; 2016-046738 AB - Since 2010, the U. S. Department of Energy has funded a series of chemical tests at the National Nuclear Security Site (NNSS) in Climax Stock granite as part of the Source Physics Experiment (SPE) with the aim of gaining a better understanding of the generation and propagation of seismic energy from underground explosions in hard rock media. To date, four tests have been conducted in the same borehole with yields of 100, 1000, 900 and 100 kg at different depths of burials. The nominal scaled depths of burial are 938, 363, 376 and 1556 m/kt1/3 compared to standard containment practices of approximately 120 m/kt1/3. A quite dense array of free field accelerometers were installed around the borehole, both on and off shot depth. Acceleration data were corrected for shock-generated baseline-shifts, and free field ground velocity waveforms were obtained. This work concentrates on the qualitative analysis of the reduced displacement potentials and the explosion source spectra for the last shot of the series (SPE-4Prime) and the comparison of the obtained results against the previous events. Finally, the results obtained from the experimental data are compared to the Mueller-Murphy empirical explosion model both using the Heard and Ackerman and Denny and Johnson cavity radius scaling laws. JF - American Geophysical Union Fall Meeting AU - Patton, H J AU - Rougier, E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2802 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207182?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Comparison+of+reduced+displacement+potentials+from+SPE+free+field+measurements%3B+SPE-4Prime+versus+previous+events&rft.au=Patton%2C+H+J%3BRougier%2C+E%3BAnonymous&rft.aulast=Patton&rft.aufirst=H&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Why waveform correlation sometimes fails AN - 1793207160; 2016-046759 AB - Waveform correlation detectors used in explosion monitoring scan noisy geophysical data to test two competing hypotheses: either (1) an amplitude-scaled version of a template waveform is present, or, (2) no signal is present at all. In reality, geophysical wavefields that are monitored for explosion signatures include waveforms produced by non-target sources that are partially correlated with the waveform template. Such signals can falsely trigger correlation detectors, particularly at low thresholds required to monitor for smaller target explosions. This challenge is particularly formidable when monitoring known test sites for seismic disturbances, since uncatalogued natural seismicity is (generally) more prevalent at lower magnitudes, and could be mistaken for small explosions. To address these challenges, we identify real examples in which correlation detectors targeting explosions falsely trigger on both site-proximal earthquakes (Figure 1, below) and microseismic "noise". Motivated by these examples, we quantify performance loss when applying these detectors, and re-evaluate the correlation-detector's hypothesis test. We thereby derive new detectors from more general hypotheses that admit unknown background seismicity, and apply these to real data. From our treatment, we derive "rules of thumb" for proper template and threshold selection in heavily cluttered signal environments. Last, we answer the question "what is the probability of falsely detecting an earthquake collocated at a test site?", using correlation detectors that include explosion-triggered templates. Figure Top: An eight-channel data stream (black) recorded from an earthquake near a mine. Red markers indicate a detection. Middle: The correlation statistic computed by scanning the template against the data stream at top. The red line indicates the threshold for event declaration, determined by a false-alarm on noise probability constraint, as computed from the signal-absent distribution using the Neyman Pearson criteria. Bottom: The histogram of the correlation statistic time series (gray) superimposed on the theoretical null distribution (black curve). The line shows the threshold, consistent with a right-tail probability, computed from the black curve. JF - American Geophysical Union Fall Meeting AU - Carmichael, Josh AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2823 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207160?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Why+waveform+correlation+sometimes+fails&rft.au=Carmichael%2C+Josh%3BAnonymous&rft.aulast=Carmichael&rft.aufirst=Josh&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Coupling hydrodynamic and wave propagation modeling for waveform modeling of SPE AN - 1793206599; 2016-046735 AB - The goal of the Source Physics Experiment (SPE) is to bring empirical and theoretical advances to the problem of detection and identification of underground nuclear explosions. This paper presents effort to improve knowledge of the processes that affect seismic wave propagation from the hydrodynamic/plastic source region to the elastic/anelastic far field thanks to numerical modeling. The challenge is to couple the prompt processes that take place in the near source region to the ones taking place later in time due to wave propagation in complex 3D geologic environments. In this paper, we report on results of first-principles simulations coupling hydrodynamic simulation codes (Abaqus and CASH), with a 3D full waveform propagation code, SPECFEM3D. Abaqus and CASH model the shocked, hydrodynamic region via equations of state for the explosive, borehole stemming and jointed/weathered granite. LANL has been recently employing a Coupled Euler-Lagrange (CEL) modeling capability. This has allowed the testing of a new phenomenological model for modeling stored shear energy in jointed material. This unique modeling capability has enabled highfidelity modeling of the explosive, the weak grout-filled borehole, as well as the surrounding jointed rock. SPECFEM3D is based on the Spectral Element Method, a direct numerical method for full waveform modeling with mathematical accuracy (e.g. Komatitsch, 1998, 2002) thanks to its use of the weak formulation of the wave equation and of high-order polynomial functions. The coupling interface is a series of grid points of the SEM mesh situated at the edge of the hydrodynamic code domain. Displacement time series at these points are computed from output of CASH or Abaqus (by interpolation if needed) and fed into the time marching scheme of SPECFEM3D. We will present validation tests and waveforms modeled for several SPE tests conducted so far, with a special focus on effect of the local topography. JF - American Geophysical Union Fall Meeting AU - Larmat, C S AU - Steedman, D W AU - Rougier, E AU - Delorey, Andrew AU - Bradley, C R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2799 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206599?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Coupling+hydrodynamic+and+wave+propagation+modeling+for+waveform+modeling+of+SPE&rft.au=Larmat%2C+C+S%3BSteedman%2C+D+W%3BRougier%2C+E%3BDelorey%2C+Andrew%3BBradley%2C+C+R%3BAnonymous&rft.aulast=Larmat&rft.aufirst=C&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - The lithospheric geoid as a constraint on plate dynamics AN - 1793206580; 2016-046841 AB - 100 years after Wegener's pioneering work there is still considerable debate about the dynamics of present-day plate motions. A better understanding of present-day dynamics is key to a better understanding of the supercontinent cycle. The Earth's gravity field is one of the primary data sets to help constrain horizontal density contrasts, and hence plate dynamic forces. Previous work has shown that the global average for the geoid step up from old oceanic lithosphere across passive continental margins to stable continental lithosphere is about 6-9m, and the global average for the geoid anomaly associated with cooling oceanic lithosphere (the so-called "ridge push") is 10-12m. The ridge geoid anomaly corresponds to a net force of approximately 3 X 1012N/m (averaged over the thickness of the lithosphere) due to "ridge push". However, for individual continental margins and mid-ocean ridge systems, there is considerable variation in the geoid step and geoid anomaly and consequently the associated forces contributing to the stress field. We explore the variation in geoid step across passive continental margins looking for correlations with age of continental breakup (and hence place within the supercontinent cycle), hot spot tracks, continental plate velocities, long-wavelength geoid energy (that may be masking signal), and small scale convection. For mid-ocean ridges, we explore variations in geoid anomaly looking for correlations with plate spreading rates, hot spot tracks, long-wavelength geoid energy (that may be masking signal), and small scale convection. We use a band-pass spherical harmonic filter on the full geoid (e.g., EGM2008-WGS84, complete to spherical harmonic degree and order 2159) between orders 6 and 80. The evaluation of the role of spatial variations in the geoid gradient for cooling oceanic lithosphere and across the continental margin in the dynamics of the intraplate stress field requires high spatial resolution modeling. We perform a high resolution finite element analysis ( approximately 35,000 elements for a spatial resolution of approximately 50 km) for the North American Plate, where previous lower resolution modeling has shown the importance of the lithospheric cooling (ridge push) force to model the broad scale stress patterns observed from the middle of the continent to the Mid-Atlantic Ridge. JF - American Geophysical Union Fall Meeting AU - Richardson, R M AU - Coblentz, D D AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract T13A EP - 2981 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206580?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+lithospheric+geoid+as+a+constraint+on+plate+dynamics&rft.au=Richardson%2C+R+M%3BCoblentz%2C+D+D%3BAnonymous&rft.aulast=Richardson&rft.aufirst=R&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Analysis of a multi-stage sounding rocket via ground--based infrasonic observations AN - 1793206541; 2016-046741 AB - Infrasonic signals produced by a four-stage sounding rocket launched from the Alomar observatory in Norway were recorded at several nearby infrasound arrays. An array very near the launch pad detected infrasound due to the rocket during the full launch, while those further from the launch point were in an acoustic shadow zone while the source was at low altitudes. Analysis of the signals on all arrays found agreement with propagation modeling predictions, implying that signals from multiple arrays could provide a means to reproduce the trajectory of a rocket using infrasonic observations. Interestingly, high-altitude stage ignitions have been found to be very low amplitude in this particular data set, possibly due to inefficiency of the aeroacoustic source mechanism in the rarefied upper atmosphere. JF - American Geophysical Union Fall Meeting AU - Blom, P S AU - Marcillo, O E AU - Arrowsmith, S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2805 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206541?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Analysis+of+a+multi-stage+sounding+rocket+via+ground--based+infrasonic+observations&rft.au=Blom%2C+P+S%3BMarcillo%2C+O+E%3BArrowsmith%2C+S%3BAnonymous&rft.aulast=Blom&rft.aufirst=P&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Fast geostatistical inversion using randomized matrix decompositions and sketchings for heterogeneous aquifer characterization AN - 1793204990; 2016-049417 AB - We present a fast, scalable, and highly-implementable stochastic inverse method for characterization of aquifer heterogeneity. The method utilizes recent advances in randomized matrix algebra and exploits the structure of the Quasi-Linear Geostatistical Approach (QLGA), without requiring a structured grid like Fast-Fourier Transform (FFT) methods. The QLGA framework is a more stable version of Gauss-Newton iterates for a large number of unknown model parameters, but provides unbiased estimates. The methods are matrix-free and do not require derivatives or adjoints, and are thus ideal for complex models and black-box implementation. We also incorporate randomized least-square solvers and data-reduction methods, which speed up computation and simulate missing data points. The new inverse methodology is coded in Julia and implemented in the MADS computational framework (http://mads.lanl.gov). Julia is an advanced high-level scientific programing language that allows for efficient memory management and utilization of high-performance computational resources. Inversion results based on series of synthetic problems with steady-state and transient calibration data are presented. JF - American Geophysical Union Fall Meeting AU - O'Malley, D AU - Le, E B AU - Vesselinov, V V AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract T31E EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793204990?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Fast+geostatistical+inversion+using+randomized+matrix+decompositions+and+sketchings+for+heterogeneous+aquifer+characterization&rft.au=O%27Malley%2C+D%3BLe%2C+E+B%3BVesselinov%2C+V+V%3BAnonymous&rft.aulast=O%27Malley&rft.aufirst=D&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - The hydrothermal alteration of cooling lava domes AN - 1793204972; 2016-048969 AB - Hydrothermal alteration is a recognized cause of volcanic instability and edifice collapse, including that of lava domes or dome complexes. Alteration by percolating fluids transforms primary minerals in dome lavas to weaker secondary products such as clay minerals; moreover, secondary mineral precipitation can affect the porosity and permeability of dome lithologies. The location and intensity of alteration in a dome depend heavily on fluid pathways and availability in conjunction with heat supply. Here we investigate postemplacement lava dome weakening by hydrothermal alteration using a finite element numerical model of water migration in simplified dome geometries. This is combined with the rock alteration index (RAI) to predict zones of alteration and secondary mineral precipitation. Our results show that alteration potential is highest at the interface between the hot core of a lava dome and its clastic talus carapace. The longest lived alteration potential fields occur in domes with persistent heat sources and permeabilities that allow sufficient infiltration of water for alteration processes, but not so much that domes cool quickly. This leads us to conclude that alteration-induced collapses are most likely to be shallow seated and originate in the talus or talus/core interface in domes which have a sustained supply of magmatic heat. Mineral precipitation at these zones of permeability contrast could create barriers to fluid flow, potentially causing gas pressurization which might promote deeper seated and larger volume collapses. This study contributes to our knowledge of how hydrothermal alteration can affect lava domes and provides constraints on potential sites for alteration-related collapses, which can be used to target hazard monitoring. Copyright 2015 Springer-Verlag Berlin Heidelberg JF - Bulletin of Volcanology AU - Ball, Jessica L AU - Stauffer, Philip H AU - Calder, Eliza S AU - Valentine, Greg A Y1 - 2015/12// PY - 2015 DA - December 2015 EP - Article 102 PB - Springer International [for the] International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI), Heidelberg VL - 77 IS - 12 SN - 0258-8900, 0258-8900 KW - talus slopes KW - numerical models KW - collapse structures KW - fluid flow KW - erosion features KW - metasomatism KW - porosity KW - boundary conditions KW - lava domes KW - finite element analysis KW - volcanic features KW - lava KW - magmas KW - cooling KW - volcanoes KW - hydrothermal alteration KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793204972?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+Volcanology&rft.atitle=The+hydrothermal+alteration+of+cooling+lava+domes&rft.au=Ball%2C+Jessica+L%3BStauffer%2C+Philip+H%3BCalder%2C+Eliza+S%3BValentine%2C+Greg+A&rft.aulast=Ball&rft.aufirst=Jessica&rft.date=2015-12-01&rft.volume=77&rft.issue=12&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+Volcanology&rft.issn=02588900&rft_id=info:doi/10.1007%2Fs00445-015-0986-z L2 - http://www.springerlink.com/(1k1tfmmpjinass550lg0zy55)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100402,1 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 95 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-06-02 N1 - CODEN - BUVOEW N1 - SubjectsTermNotLitGenreText - boundary conditions; collapse structures; cooling; erosion features; finite element analysis; fluid flow; hydrothermal alteration; lava; lava domes; magmas; metasomatism; numerical models; porosity; talus slopes; volcanic features; volcanoes DO - http://dx.doi.org/10.1007/s00445-015-0986-z ER - TY - JOUR T1 - Ionospheric disturbances originating from tropospheric and ground activities; a new strategic research program at the Los Alamos National Laboratory AN - 1793203301; 2016-049228 AB - It has been increasingly recognized and observed that activities within the troposphere, either natural (e.g., thunderstorm, earthquake, volcano) or anthropogenic (e.g., explosion above or below ground), can substantially disturb the ionosphere in the forms of atmosphere gravity wave, infrasonic acoustic wave, and electric-field-induced ionospheric chemical reaction. These disturbances introduce plasma density variations in the ionosphere that adversely distort the transionospheric radio signals for communication, navigation, surveillance, and other national security missions. A new three-year strategic research program has been initiated at LANL in FY16 to investigate, understand, and characterize the interwoven dynamic and electrodynamic coupling processes from the source in the troposphere to the disturbances in the ionosphere via comprehensive observation and model simulation. The planned study area is chosen to be over the US Great Plains where severe thunderstorms occur frequently and where the necessary atmospheric and ionospheric observations are conducted routinely. In this presentation, we will outline our program plan, technical approaches, and scientific goals, and will discuss opportunities of possible inter-institute collaborations. JF - American Geophysical Union Fall Meeting AU - Shao, X M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract SA41B EP - 2354 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793203301?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Ionospheric+disturbances+originating+from+tropospheric+and+ground+activities%3B+a+new+strategic+research+program+at+the+Los+Alamos+National+Laboratory&rft.au=Shao%2C+X+M%3BAnonymous&rft.aulast=Shao&rft.aufirst=X&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - SALSA3D; a global 3D velocity model for improved seismic event location in nuclear explosion monitoring AN - 1793202916; 2016-046766 AB - The SALSA3D global, 3D velocity model of the Earths mantle has been developed to improve the accuracy and precision of seismic travel time predictions for a wide suite of regional and teleseismic phases. Improved travel time predictions lead directly to significant improvements in the accuracy and precision of seismic event locations as compared to locations computed using standard 1D velocity models like ak135, or 21/2D models like RSTT. A key feature of SALSA3D is that path-specific model uncertainty of travel time predictions are calculated using the full 3D model covariance matrix computed during tomography, which results in more realistic uncertainty ellipses that directly reflect tomographic data coverage. Recent improvements in the model include the generation of an S velocity model to compliment the P velocity model and development of capability to compute travel times for core phases, reflections off the core-mantle boundary and underside reflections off the Moho and the surface of the Earth. For use in routine operations, travel time predictions and prediction uncertainties are precomputed and stored in station-phase-specific 3D lookup tables, which allows fast, reliable retrieval of information needed by locators. The lookup capabilities are based on the open-source GeoTess software package available at http://www.sandia.gov/geotess. JF - American Geophysical Union Fall Meeting AU - Ballard, S AU - Begnaud, M L AU - Hipp, J R AU - Encarnacao, A V AU - Young, C J AU - Phillips, W S AU - Chael, E P AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2830 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793202916?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=SALSA3D%3B+a+global+3D+velocity+model+for+improved+seismic+event+location+in+nuclear+explosion+monitoring&rft.au=Ballard%2C+S%3BBegnaud%2C+M+L%3BHipp%2C+J+R%3BEncarnacao%2C+A+V%3BYoung%2C+C+J%3BPhillips%2C+W+S%3BChael%2C+E+P%3BAnonymous&rft.aulast=Ballard&rft.aufirst=S&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Anisotropic elastic-waveform inversion with compressive sensing for sparse seismic data AN - 1789754396; 2016-042615 AB - Elastic-waveform inversion (EWI) is a promising tool to reconstruct subsurface P- and S-wave velocity models with multicomponent seismic data. However, the existence of velocity anisotropy caused by aligned fractures introduces great challenge in reconstructing accurate medium properties. The number of elastic parameters for anisotropic media is much higher than that of elastic media, making anisotropic elastic-waveform inversion even more nonlinear and non-unique than isotropic elastic-waveform inversion. In addition, seismic data for many applications such as geothermal exploration and monitoring for enhanced geothermal systems are often acquired using sparsely distributed sources and receivers. We develop an anisotropic elastic-waveform inversion method with a compressive sensing technique for characterizing fracture zones using sparse seismic data. Rather than inverting for a reference velocity and Thomsen's anisotropic parameters that are based on weak anisotropy assumption, we directly invert for subsurface elasticity parameters with multicomponent seismic data. We employ a compressive sensing technique to handle sparsely acquired seismic data. Furthermore, we formulate the conventional least-squares-based elastic-waveform inversion problem into two minimization subproblems to improve the robustness and the convergence rate of the inverse problem. We demonstrate the effectiveness of our new anisotropic elastic-waveform inversion with compressive sensing using synthetic and field sparse seismic data. JF - American Geophysical Union Fall Meeting AU - Gao, K AU - Huang, L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S23B EP - 2703 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789754396?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Anisotropic+elastic-waveform+inversion+with+compressive+sensing+for+sparse+seismic+data&rft.au=Gao%2C+K%3BHuang%2C+L%3BAnonymous&rft.aulast=Gao&rft.aufirst=K&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Path-dependent travel time prediction variance and covariance for a global tomographic P- and S-velocity model AN - 1789749593; 2016-042561 AB - Recently our combined SNL-LANL research team has succeeded in developing a global, seamless 3D tomographic P- and S-velocity model (SALSA3D) that provides superior first P and first S travel time predictions at both regional and teleseismic distances. However, given the variable data quality and uneven data sampling associated with this type of model, it is essential that there be a means to calculate high-quality estimates of the path-dependent variance and covariance associated with the predicted travel times of ray paths through the model. In this paper, we describe a methodology for accomplishing this by exploiting the full model covariance matrix and show examples of path-dependent travel time prediction uncertainty computed from our latest tomographic model. Typical global 3D SALSA3D models have on the order of 1/2 million nodes, so the challenge in calculating the covariance matrix is formidable: 0.9 TB storage for 1/2 of a symmetric matrix, necessitating an Out-Of-Core (OOC) blocked matrix solution technique. With our approach the tomography matrix (G which includes a prior model covariance constraint) is multiplied by its transpose (GTG) and written in a blocked sub-matrix fashion. We employ a distributed parallel solution paradigm that solves for (GTG)-1 by assigning blocks to individual processing nodes for matrix decomposition update and scaling operations. We first find the Cholesky decomposition of GTG which is subsequently inverted. Next, we employ OOC matrix multiplication methods to calculate the model covariance matrix from (GTG)-1 and an assumed data covariance matrix. Given the model covariance matrix, we solve for the travel-time covariance associated with arbitrary ray-paths by summing the model covariance along both ray paths. Setting the paths equal and taking the square root yields the travel prediction uncertainty for the single path. JF - American Geophysical Union Fall Meeting AU - Hipp, J R AU - Ballard, S AU - Begnaud, M L AU - Encarnacao, A V AU - Young, C J AU - Phillips, W S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S21B EP - 2693 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789749593?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Path-dependent+travel+time+prediction+variance+and+covariance+for+a+global+tomographic+P-+and+S-velocity+model&rft.au=Hipp%2C+J+R%3BBallard%2C+S%3BBegnaud%2C+M+L%3BEncarnacao%2C+A+V%3BYoung%2C+C+J%3BPhillips%2C+W+S%3BAnonymous&rft.aulast=Hipp&rft.aufirst=J&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Event detection and location of earthquakes using the Cascadia Initiative dataset AN - 1789748484; 2016-045048 AB - The Cascadia subduction zone (CSZ) produces a range of slip behavior along the plate boundary megathrust, from great earthquakes to episodic slow slip and tremor (ETS). Unlike other subduction zones that produce great earthquakes and ETS, the CSZ is notable for the lack of small and moderate magnitude earthquakes recorded. The seismogenic zone extent is currently estimated to be primarily offshore, thus the lack of observed small, interplate earthquakes may be partially due to the use of only land seismometers. The Cascadia Initiative (CI) community seismic experiment seeks to address this issue by including ocean bottom seismometers (OBS) deployed directly over the locked seismogenic zone, in addition to land seismometers. We use these seismic data to explore whether small magnitude earthquakes are occurring on the plate interface, but have gone undetected by the land-based seismic networks. We select a subset of small magnitude (M0.1-3.7) earthquakes from existing earthquake catalogs, based on land seismic data, whose preliminary hypocentral locations suggest they may have occurred on the plate interface. We window the waveforms on CI OBS and land seismometers around the phase arrival times for these earthquakes to generate templates for subspace detection, which allows for additional flexibility over traditional matched filter detection methods. Here we present event detections from the first year of CI deployment and preliminary locations for the detected events. Initial results of scanning the first year of the CI deployment using one cluster of template events, located near a previously identified subducted seamount, include 473 detections on OBS station M08A ( nearly equal 61.6 km offshore) and 710 detections on OBS station J25A ( nearly equal 44.8 km northeast of M08A). Ongoing efforts include detection using additional OBS stations along the margin, as well as determining locations of clusters detected in the first year of deployment. JF - American Geophysical Union Fall Meeting AU - Morton, E AU - Bilek, S L AU - Rowe, C A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract T51D EP - 2902 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789748484?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Event+detection+and+location+of+earthquakes+using+the+Cascadia+Initiative+dataset&rft.au=Morton%2C+E%3BBilek%2C+S+L%3BRowe%2C+C+A%3BAnonymous&rft.aulast=Morton&rft.aufirst=E&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Relative earthquake location for remote offshore and tectonically active continental regions using surface waves AN - 1789747854; 2016-044675 AB - Earthquake locations are a fundamental parameter necessary for reliable seismic monitoring and seismic event characterization. Within dense continental seismic networks, event locations can be accurately and precisely estimated. However, for many regions of interest, existing catalog data and traditional location methods provide neither accurate nor precise hypocenters. In particular, for isolated continental and offshore areas, seismic event locations are estimated primarily using distant observations, often resulting in inaccurate and imprecise locations. The use of larger, moderate-size events is critical to the construction of useful travel-time corrections in regions of strong geologic heterogeneity. Double difference methods applied to cross-correlation measured Rayleigh and Love wave time shifts are an effective tool at providing improved epicentroid locations and relative origin-time shifts in these regions. Previous studies have applied correlation of R1 and G1 waveforms to moderate-magnitude vertical strike-slip transform-fault and normal faulting earthquakes from nearby ridges. In this study, we explore the utility of phase-match filtering techniques applied to surface waves to improve cross-correlation measurements, particularly for smaller magnitude seismic events. We also investigate the challenges associated with applying surface-wave location methods to shallow earthquakes in tectonically active continental regions. JF - American Geophysical Union Fall Meeting AU - Cleveland, M AU - Ammon, C J AU - Vandemark, T F AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S11A EP - 2762 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789747854?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Relative+earthquake+location+for+remote+offshore+and+tectonically+active+continental+regions+using+surface+waves&rft.au=Cleveland%2C+M%3BAmmon%2C+C+J%3BVandemark%2C+T+F%3BAnonymous&rft.aulast=Cleveland&rft.aufirst=M&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Detection and location of earthquakes along the west coast of Chile; examining seismicity in the 2010 M 8.8 Maule and 2014 M 8.1 Iquique earthquake rupture zones AN - 1789747355; 2016-045067 AB - The subduction of the Nazca Plate beneath the South American Plate along Chile has led to some of the largest earthquakes recorded on modern seismic instrumentation. These include the 1960 M 9.5 Valdivia, 2010 M 8.8 Maule, and 2014 M 8.1 Iquique earthquakes. Slip heterogeneity for both the 2010 and 2014 earthquakes has been noted in various studies. In order to explore both spatial variations in the continued aftershocks of the 2010 event, and also seismicity to the north along Iquique prior to the 2014 earthquake relative to the high slip regions, we are expanding the catalog of small earthquakes using template matching algorithms to find other small earthquakes in the region. We start with an earthquake catalog developed from regional and local array data; these events provide the templates used to search through waveform data from a temporary seismic array in Malargue, Argentina, located nearly equal 300 km west of the Maule region, which operated in 2012. Our template events are first identified on the array stations, and we use a 10-s window around the P-wave arrival as the template. We then use a waveform cross-correlation algorithm to compare the template with day-long seismograms from Malargue stations. The newly detected events are then located using the HYPOINVERSE2000 program. Initial results for 103 templates on 19 of the array stations show that we find 275 new events, with an average of three new events for each template correlated. For these preliminary results, events from the Maule region appear to provide the most new detections, with an average of ten new events. We will present our locations for the detected events and we will compare them to patterns of high slip along the 2010 rupture zone of the M 8.8 Maule earthquake and the 2014 M 8.1 Iquique event. JF - American Geophysical Union Fall Meeting AU - Diniakos, R S AU - Bilek, S L AU - Rowe, C A AU - Draganov, D AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract T51D EP - 2921 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789747355?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Detection+and+location+of+earthquakes+along+the+west+coast+of+Chile%3B+examining+seismicity+in+the+2010+M+8.8+Maule+and+2014+M+8.1+Iquique+earthquake+rupture+zones&rft.au=Diniakos%2C+R+S%3BBilek%2C+S+L%3BRowe%2C+C+A%3BDraganov%2C+D%3BAnonymous&rft.aulast=Diniakos&rft.aufirst=R&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Microearthquakes at Valles Caldera, New Mexico; improved detection and location with two additional caldera stations AN - 1789747255; 2016-044673 AB - The Los Alamos Seismic Network (LASN) has operated for 43 years, providing data to locate more than 2,500 earthquakes in north-central New Mexico. Roughly 1-2 earthquakes are detected and located per month within about 150 km of Los Alamos, a total of over 900 from 1973 to present. LASN's primary purpose is to monitor seismicity close to the Los Alamos National Laboratory (LANL) for seismic hazards; monitoring seismicity associated with the nearby Valles Caldera is secondary. Until 2010 the network was focused on monitoring seismic hazards and comprised only 7 stations, all near LANL or in the nearby Jemez Mountains. Just one station-PER, installed in 1998-was close enough to Valles Caldera to be able to detect microearthquakes located in or near the caldera. An initial study of the data from station PER between 1998 and 2002 identified and located 13 events with magnitudes less than 0.5 using the single-station hodogram technique. Those events were all located south of the caldera within a few kilometers of PER. Recently, two new digital broadband stations were installed inside the caldera, one on a northeastern ring-fracture dome, station CDAB, and the other on a northwestern dome, station SAMT. Also, station PER was upgraded with digital broadband instrumentation. Thus, LASN now can detect and record microearthquakes as small as magnitude -1.5 near the caldera, and they can be located using multiple arrival times. Several recent events located near station SAMT on the caldera's ring fracture are the first that have been seen in that area. Additional events were recorded (by all three stations) and located in the area south of the caldera where the earlier hodogram-only events were located. These new multi-station event recordings allow a more quantitative assessment of the uncertainties in the initial single-station hodogram locations. Each event is located using multiple arrival times as well as the hodogram method at as many as three stations. Thus, improvements can be made to the microearthquake locations for the time period before the additional stations were available. Comparisons of the results obtained with these two approaches will be shown and possible implications for the caldera-related origin of these events will be discussed. Public release of LASN data can be granted on a case-by-case basis. JF - American Geophysical Union Fall Meeting AU - Roberts, P M AU - House, L S AU - Ten Cate, J A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S11A EP - 2760 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789747255?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Microearthquakes+at+Valles+Caldera%2C+New+Mexico%3B+improved+detection+and+location+with+two+additional+caldera+stations&rft.au=Roberts%2C+P+M%3BHouse%2C+L+S%3BTen+Cate%2C+J+A%3BAnonymous&rft.aulast=Roberts&rft.aufirst=P&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Simultaneous inversion of interpolated receiver functions, surface-wave dispersion, and gravity observations for lithospheric structure beneath the Eastern United States AN - 1784737007; 2016-038027 AB - The unprecedented high-quality seismic data from Earthscope's Transportable Array provide us a great opportunity to investigate the subsurface structure beneath North America. Even with such a fine network, tightly constraining the 3D lithospheric structure is a challenge. Integrating complementary geophysical observations in simultaneous inversions has produced promising results. We have developed a receiver-function wavefield interpolation/smoothing method to enhance the complementariness of receiver functions and surface-wave dispersion. Combining information from adjacent seismic stations suppresses poorly sampled and difficult-to-interpret back-azimuthal variations and allows the stable extraction of the key features in the receiver-function wavefield. The interpolated receiver functions are inverted simultaneously with Rayleigh-wave phase and group velocities and Bouguer gravity observations to produce a robust estimate of the broad 3D shear-wave speed variations beneath the eastern United States. P-wave velocities and density variations are related to shear-speed using empirical velocity ratios and relations. We constrain the 3D variations to be laterally and vertically smooth. Application of the same methods to the western conterminous United States resulted in velocity images that are consistent with published models on the first order. With the completion of the Transportable Array deployment in the northeast US, the seismic dataset beneath the eastern U.S. region is complete. Preliminary inversions contain expected near-surface low shear-wave speeds associated with large basins and coastal regions and thicker crust beneath the interior compared with the coastal regions. Speeds in the upper mantle are generally typical, but the model includes several regions of relatively slow mantle beneath the northern Mississippi Embayment, the east coast, and beneath New England. JF - American Geophysical Union Fall Meeting AU - Chai, C AU - Ammon, Charles J AU - Maceira, M AU - Herrmann, R B AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S14A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1784737007?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Simultaneous+inversion+of+interpolated+receiver+functions%2C+surface-wave+dispersion%2C+and+gravity+observations+for+lithospheric+structure+beneath+the+Eastern+United+States&rft.au=Chai%2C+C%3BAmmon%2C+Charles+J%3BMaceira%2C+M%3BHerrmann%2C+R+B%3BAnonymous&rft.aulast=Chai&rft.aufirst=C&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-04-28 N1 - CODEN - #07548 ER - TY - JOUR T1 - Improving velocity models for microseismic imaging AN - 1784736075; 2016-038044 AB - Microseismic imaging is a useful tool for monitoring migration of the CO (sub 2) plume and subsurface pressure changes during geologic carbon storage. An accurate velocity model is crucial for microseismic event location and focal mechanism inversion. For cost-effective long-term monitoring, the number of seismic stations are often limited, and their spatial distribution is usually sparse. To obtain an accurate velocity model for microseismic imaging, we develop a double-difference tomography method with a compressive sensing technique. The compressive sensing technique was developed to extract information from sparsely measured signals. We adapt this technique into double-difference tomography to alleviate inversion artifacts caused by the sparse distribution of seismic stations. We validate our new method using synthetic microseismic data and show that our new method significantly improves the accuracy of microseismic velocity inversion for a sparse seismic network. JF - American Geophysical Union Fall Meeting AU - Huang, L AU - Lin, Y AU - Chen, T AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S21A EP - 2672 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1784736075?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Improving+velocity+models+for+microseismic+imaging&rft.au=Huang%2C+L%3BLin%2C+Y%3BChen%2C+T%3BAnonymous&rft.aulast=Huang&rft.aufirst=L&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-04-28 N1 - CODEN - #07548 ER - TY - JOUR T1 - Tidal triggering of earthquakes near Parkfield, California indicates a high coefficient of friction on the shallow San Andreas Fault AN - 1784735906; 2016-037985 AB - Investigators have searched for evidence of tidal triggering of earthquakes for decades because triggering behavior provides potentially valuable information about the stress conditions on faults and how earthquake nucleate. Earth tides are caused by the gravitational pull of the sun and moon which induce periodic stresses with two important components related to the rotation of the Earth relative to the sun and moon (semi-diurnal 12 and approximately 12.4 hours) and the orbit of the moon around the Earth (fortnightly, approximately 14.7 days). Semi-diurnal tidal stresses have previously been shown to trigger low frequency earthquakes (LFEs) and non-volcanic tremors (NVTs) on the San Andreas Fault. LFEs and NVTs occur within the brittle-ductile transition of the Earth's crust, deeper than where regular earthquakes occur. Here we show that tidal stresses trigger earthquakes in the brittle upper crust, which is caused by and detectable due to interactions between the semi-diurnal and fortnightly stress cycles. The triggering of LFEs and NVTs are correlated with tidal shear stresses indicating a low coefficient of friction on the deep San Andreas Fault. In contrast, we find that regular earthquakes are correlated with tidal normal stresses indicating a high coefficient of friction in the shallow San Andreas Fault. That earthquakes are triggered during peak normal (extensional) tidal stresses suggests that pore pressures are below lithostatic pressure in the upper crust. These findings suggests tidal triggering can be applied to infer crustal stress state and pore pressure conditions, two properties of faults that are difficult to measure but are important for understanding earthquake physics and seismic hazards. JF - American Geophysical Union Fall Meeting AU - Delorey, Andrew A AU - Johnson, P A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S13B EP - 2831 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1784735906?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Tidal+triggering+of+earthquakes+near+Parkfield%2C+California+indicates+a+high+coefficient+of+friction+on+the+shallow+San+Andreas+Fault&rft.au=Delorey%2C+Andrew+A%3BJohnson%2C+P+A%3BAnonymous&rft.aulast=Delorey&rft.aufirst=Andrew&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-04-28 N1 - CODEN - #07548 ER - TY - JOUR T1 - Persistent U(IV) and U(VI) following in situ recovery (ISR) mining of a sandstone uranium deposit, Wyoming, USA AN - 1780806001; 2016-033077 AB - Drill-core samples from a sandstone-hosted uranium (U) deposit in Wyoming were characterized to determine the abundance and distribution of uranium following in-situ recovery (ISR) mining with oxygen- and carbon dioxide-enriched water. Concentrations of uranium, collected from ten depth intervals, ranged from 5 to 1920 ppm. A composite sample contained 750 ppm uranium with an average oxidation state of 54% U(VI) and 46% U(IV). Scanning electron microscopy (SEM) indicated rare high uranium ( approximately 1000 ppm U) in spatial association with P/Ca and Si/O attributed to relict uranium minerals, possibly coffinite, uraninite, and autunite, trapped within low permeability layers bypassed during ISR mining. Fission track analysis revealed lower but still elevated concentrations of U in the clay/silica matrix and organic matter (several 10 s ppm) and yet higher concentrations associated with Fe-rich/S-poor sites, likely iron oxides, on altered chlorite or euhedral pyrite surfaces (but not on framboidal pyrite). Organic C (<1.62%), total S (<0.31%), and P (<0.03%) were in low abundance relative to the overall bulk composition. Microbial community analysis showed a diverse group of bacteria present with a wide range of putative metabolisms, and provides evidence for a variety of redox microenvironments co-existing in core samples. Although the uranium minerals persisting in low permeability areas in association with organic carbon were less affected by oxidizing solutions during mining, the likely sequestration of uranium within labile iron oxides following mining and sensitivity to changes in redox conditions requires careful attention during groundwater restoration. Abstract Copyright (2015) Elsevier, B.V. JF - Applied Geochemistry AU - Gallegos, T J AU - Campbell, K M AU - Zielinski, R A AU - Reimus, P W AU - Clay, J T AU - Janot, N AU - Bargar, John R AU - Benzel, William M Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 222 EP - 234 PB - Elsevier, Oxford-New York-Beijing VL - 63 SN - 0883-2927, 0883-2927 KW - United States KW - mineral deposits, genesis KW - sorption KW - iron oxides KW - X-ray diffraction data KW - remediation KW - ground water KW - XANES spectra KW - fission tracks KW - carbon KW - oxides KW - spectra KW - reduction KW - organic carbon KW - water pollution KW - Powder River basin KW - Eh KW - acid mine drainage KW - pollutants KW - metabolism KW - biochemistry KW - Smith Ranch-Highland Mine KW - pollution KW - electron microscopy data KW - Converse County Wyoming KW - solubility KW - X-ray spectra KW - EDS spectra KW - Wyoming KW - uranium ores KW - biogenic processes KW - sandstone-type deposits KW - metals KW - bacteria KW - metal ores KW - uranium KW - sulfides KW - actinides KW - SEM data KW - permeability KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780806001?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=Persistent+U%28IV%29+and+U%28VI%29+following+in+situ+recovery+%28ISR%29+mining+of+a+sandstone+uranium+deposit%2C+Wyoming%2C+USA&rft.au=Gallegos%2C+T+J%3BCampbell%2C+K+M%3BZielinski%2C+R+A%3BReimus%2C+P+W%3BClay%2C+J+T%3BJanot%2C+N%3BBargar%2C+John+R%3BBenzel%2C+William+M&rft.aulast=Gallegos&rft.aufirst=T&rft.date=2015-12-01&rft.volume=63&rft.issue=&rft.spage=222&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2015.08.017 L2 - http://www.sciencedirect.com/science/journal/08832927 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 38 N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-04-14 N1 - SubjectsTermNotLitGenreText - acid mine drainage; actinides; bacteria; biochemistry; biogenic processes; carbon; Converse County Wyoming; EDS spectra; Eh; electron microscopy data; fission tracks; ground water; iron oxides; metabolism; metal ores; metals; mineral deposits, genesis; organic carbon; oxides; permeability; pollutants; pollution; Powder River basin; reduction; remediation; sandstone-type deposits; SEM data; Smith Ranch-Highland Mine; solubility; sorption; spectra; sulfides; United States; uranium; uranium ores; water pollution; Wyoming; X-ray diffraction data; X-ray spectra; XANES spectra DO - http://dx.doi.org/10.1016/j.apgeochem.2015.08.017 ER - TY - JOUR T1 - Field observations and numerical modeling of the thermal effects of groundwater flow through a Subarctic fen AN - 1777469620; 2016-028197 AB - Field observations and numerical modeling of ground temperatures are the main tools for understanding current and projecting future permafrost changes in the rapidly warming Arctic. Traditionally, most studies have focused on vertical fluxes of heat through the ground. Groundwater can transport heat in both lateral and vertical directions but its influence on ground temperatures at local scales in permafrost environments is not well understood. In this study field observations from a subarctic fen located within the sporadic permafrost zone are combined with numerical simulations for investigating coupled water and thermal fluxes. Ground temperature profiles and groundwater levels were observed in boreholes at the Tavvavuoma study site in northern Sweden. Based on these observations, one- and two-dimensional simulations down to 2 m depth across a gradient of permafrost conditions both within and surrounding the fen, were set up. To quantify the influence of groundwater flows on the ground temperature, two-dimensional scenarios representing the fen under various groundwater fluxes were developed. The observations suggest that lateral groundwater flows significantly affect ground temperatures. This is corroborated by modeling results that show seasonal ground ice melts 1 month earlier when a lateral groundwater flux is present. Further, although the thermal regime may be dominated by vertically conducted heat fluxes during most of the year, isolated high groundwater flow events can be potentially important for ground temperatures. Sporadic permafrost environments contain substantial portions of unfrozen ground, often with active groundwater flow paths such as fens. Knowledge of this heat transport mechanism is therefore important for understanding permafrost dynamics in these environments. JF - American Geophysical Union Fall Meeting AU - Sjoberg, Ylva AU - Coon, Ethan AU - Sannel, Britta AU - Pannetier, Romain AU - Harp, Dylan R AU - Frampton, Andrew AU - Painter, Scott L AU - Lyon, Steve W AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract GC23J EP - 1225 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777469620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Field+observations+and+numerical+modeling+of+the+thermal+effects+of+groundwater+flow+through+a+Subarctic+fen&rft.au=Sjoberg%2C+Ylva%3BCoon%2C+Ethan%3BSannel%2C+Britta%3BPannetier%2C+Romain%3BHarp%2C+Dylan+R%3BFrampton%2C+Andrew%3BPainter%2C+Scott+L%3BLyon%2C+Steve+W%3BAnonymous&rft.aulast=Sjoberg&rft.aufirst=Ylva&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-04-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Global-scale environmental control of plant photosynthetic capacity AN - 1776655727; PQ0002757696 AB - Photosynthetic capacity, determined by light harvesting and carboxylation reactions, is a key plant trait that determines the rate of photosynthesis; however, in Earth System Models (ESMs) at a reference temperature, it is either a fixed value for a given plant functional type or derived from a linear function of leaf nitrogen content. In this study, we conducted a comprehensive analysis that considered correlations of environmental factors with photosynthetic capacity as determined by maximum carboxylation (V sub(c,m)) rate scaled to 25[degrees]C (i.e., V sub(c,25); [mu]mol CO sub(2)[middot]m super(-2)[middot]s super(-1)) and maximum electron transport rate (J max) scaled to 25[degrees]C (i.e., J sub(25); [mu]mol electron[middot]m super(-2)[middot]s super(-1)) at the global scale. Our results showed that the percentage of variation in observed V sub(c,25) and J sub(25) explained jointly by the environmental factors (i.e., day length, radiation, temperature, and humidity) were 2-2.5 times and 6-9 times of that explained by area-based leaf nitrogen content, respectively. Environmental factors influenced photosynthetic capacity mainly through photosynthetic nitrogen use efficiency, rather than through leaf nitrogen content. The combination of leaf nitrogen content and environmental factors was able to explain ~56% and ~66% of the variation in V sub(c,25) and J sub(25) at the global scale, respectively. Our analyses suggest that model projections of plant photosynthetic capacity and hence land-atmosphere exchange under changing climatic conditions could be substantially improved if environmental factors are incorporated into algorithms used to parameterize photosynthetic capacity in ESMs. JF - Ecological Applications AU - Ali, Ashehad A AU - Xu, Chonggang AU - Rogers, Alistair AU - McDowell, Nathan G AU - Medlyn, Belinda E AU - Fisher, Rosie A AU - Wullschleger, Stan D AU - Reich, Peter B AU - Vrugt, Jasper A AU - Bauerle, William L AU - Santiago, Louis S AU - Wilson, Cathy J AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 USA, ali.ashehad@gmail.com Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 2349 EP - 2365 PB - Ecological Society of America, 1707 H Street, N.W., Suite 400 Washington DC 20006 United States VL - 25 IS - 8 SN - 1051-0761, 1051-0761 KW - Environment Abstracts; Ecology Abstracts KW - climate change KW - climate variables KW - Earth System Models KW - leaf nitrogen content KW - photosynthetic capacity KW - plant traits KW - Temperature effects KW - Photosynthesis KW - Carboxylation KW - Temperature KW - Leaves KW - Algorithms KW - Humidity KW - Environmental factors KW - Climatic conditions KW - Radiation KW - Electron transport KW - Harvesting KW - Nitrogen KW - D 04040:Ecosystem and Ecology Studies KW - ENA 20:Weather Modification & Geophysical Change UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1776655727?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ecological+Applications&rft.atitle=Global-scale+environmental+control+of+plant+photosynthetic+capacity&rft.au=Ali%2C+Ashehad+A%3BXu%2C+Chonggang%3BRogers%2C+Alistair%3BMcDowell%2C+Nathan+G%3BMedlyn%2C+Belinda+E%3BFisher%2C+Rosie+A%3BWullschleger%2C+Stan+D%3BReich%2C+Peter+B%3BVrugt%2C+Jasper+A%3BBauerle%2C+William+L%3BSantiago%2C+Louis+S%3BWilson%2C+Cathy+J&rft.aulast=Ali&rft.aufirst=Ashehad&rft.date=2015-12-01&rft.volume=25&rft.issue=8&rft.spage=2349&rft.isbn=&rft.btitle=&rft.title=Ecological+Applications&rft.issn=10510761&rft_id=info:doi/10.1890%2F14-2111.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Temperature effects; Photosynthesis; Radiation; Carboxylation; Algorithms; Leaves; Humidity; Electron transport; Climatic conditions; Environmental factors; Harvesting; Nitrogen; Temperature DO - http://dx.doi.org/10.1890/14-2111.1 ER - TY - JOUR T1 - Genetic diversity within the botulinum neurotoxin-producing bacteria and their neurotoxins. AN - 1736411334; 26368006 AB - The recent availability of multiple Clostridium botulinum genomic sequences has initiated a new genomics era that strengthens our understanding of the bacterial species that produce botulinum neurotoxins (BoNTs). Analysis of the genomes has reinforced the historical Group I-VI designations and provided evidence that the bont genes can be located within the chromosome, phage or plasmids. The sequences provide the opportunity to examine closely the variation among the toxin genes, the composition and organization of the toxin complex, the regions flanking the toxin complex and the location of the toxin within different bacterial strains. These comparisons provide evidence of horizontal gene transfer and site-specific insertion and recombination events that have contributed to the variation observed among the neurotoxins. Here, examples that have contributed to the variation observed in serotypes A-H strains are presented to illustrate the mechanisms that have contributed to their variation. JF - Toxicon : official journal of the International Society on Toxinology AU - Hill, K K AU - Xie, G AU - Foley, B T AU - Smith, T J AD - Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Electronic address: khill@lanl.gov. ; Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. ; Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. ; Molecular and Translational Sciences Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD 21702, USA. Y1 - 2015/12/01/ PY - 2015 DA - 2015 Dec 01 SP - 2 EP - 8 VL - 107 KW - botulinum toxin type D KW - 0 KW - botulinum toxin type F KW - botulinum toxin type G KW - rimabotulinumtoxinB KW - 0Y70779M1F KW - Botulinum Toxins KW - EC 3.4.24.69 KW - Botulinum Toxins, Type A KW - botulinum toxin type C KW - FPM7829VMX KW - botulinum toxin type E KW - T579M564JY KW - Index Medicus KW - Genetic diversity KW - Clostridium botulinum KW - Botulinum neurotoxin KW - Genome, Bacterial -- genetics KW - Genetic Variation KW - Genes, Bacterial -- genetics KW - Botulinum Toxins, Type A -- genetics KW - Botulinum Toxins -- genetics KW - Clostridium botulinum -- metabolism KW - Botulinum Toxins -- metabolism KW - Clostridium botulinum -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1736411334?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Toxicon+%3A+official+journal+of+the+International+Society+on+Toxinology&rft.atitle=Genetic+diversity+within+the+botulinum+neurotoxin-producing+bacteria+and+their+neurotoxins.&rft.au=Hill%2C+K+K%3BXie%2C+G%3BFoley%2C+B+T%3BSmith%2C+T+J&rft.aulast=Hill&rft.aufirst=K&rft.date=2015-12-01&rft.volume=107&rft.issue=&rft.spage=2&rft.isbn=&rft.btitle=&rft.title=Toxicon+%3A+official+journal+of+the+International+Society+on+Toxinology&rft.issn=1879-3150&rft_id=info:doi/10.1016%2Fj.toxicon.2015.09.011 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-09-19 N1 - Date created - 2015-11-23 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.toxicon.2015.09.011 ER - TY - JOUR T1 - Vectorization, threading, and cache-blocking considerations for hydrocodes on emerging architectures AN - 1735920935; PQ0002290075 AB - The computational efficiency of existing hydrocodes is expected to suffer as computer architectures advance beyond the traditional parallel central processing unit (CPU) model . Concerning new computer architectures, sources of relative performance degradation might include reduced memory bandwidth per core, increased resource contention due to concurrency, increased single instruction, multiple data (SIMD) length, and increasingly complex memory hierarchies. Concerning existing codes, any performance degradation will be influenced by a lack of attention to performance in their design and implementation. This work reports on considerations for improving computational performance in preparation for current and expected changes to computer architecture. The algorithms studied will include increasingly complex prototypes for radiation hydrodynamics codes, such as gradient routines and diffusion matrix assembly (e.g., in ). The meshes considered for the algorithms are structured or unstructured meshes. The considerations applied for performance improvements are meant to be general in terms of architecture (not specifically graphical processing unit (GPUs) or multi-core machines, for example) and include techniques for vectorization, threading, tiling, and cache blocking. Out of a survey of optimization techniques on applications such as diffusion and hydrodynamics, we make general recommendations with a view toward making these techniques conceptually accessible to the applications code developer. We present considerations for improving computational performance of hydrodynamics codes in preparation for current and expected changes to computer architecture. The algorithms studied include prototypes such as gradient routines, and the considerations applied for performance improvements include techniques for vectorization, threading, tiling, and cache blocking. Out of a survey of optimization techniques on applications such as diffusion and hydro, we make general recommendations with a view toward making these techniques conceptually accessible to the applications code developer. JF - International Journal for Numerical Methods in Fluids AU - Fung, J AU - Aulwes, R T AU - Bement, M T AU - Campbell, J M AU - Ferenbaugh, C R AU - Jean, BA AU - Kelley, T M AU - Kenamond, MA AU - Lally, B R AU - Lovegrove, E G AU - Nelson, E M AU - Powell, D M AD - X-Computational Physics Division, Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87545, USA. Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 596 EP - 613 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 79 IS - 11 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Hydrodynamics KW - Degradation KW - Prototypes KW - Computers KW - Algorithms KW - Architecture KW - Surveys KW - Radiation KW - Fluid dynamics KW - Optimization KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - Q2 09169:Fluid mechanics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1735920935?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=Vectorization%2C+threading%2C+and+cache-blocking+considerations+for+hydrocodes+on+emerging+architectures&rft.au=Fung%2C+J%3BAulwes%2C+R+T%3BBement%2C+M+T%3BCampbell%2C+J+M%3BFerenbaugh%2C+C+R%3BJean%2C+BA%3BKelley%2C+T+M%3BKenamond%2C+MA%3BLally%2C+B+R%3BLovegrove%2C+E+G%3BNelson%2C+E+M%3BPowell%2C+D+M&rft.aulast=Fung&rft.aufirst=J&rft.date=2015-12-01&rft.volume=79&rft.issue=11&rft.spage=596&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.4063 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Radiation; Prototypes; Fluid dynamics; Degradation; Hydrodynamics; Computers; Algorithms; Surveys; Architecture; Optimization DO - http://dx.doi.org/10.1002/fld.4063 ER - TY - JOUR T1 - An evaluation of health risk to the public as a consequence of in situ uranium mining in Wyoming, USA. AN - 1723756665; 26327367 AB - In the United States there is considerable public concern regarding the health effects of in situ recovery uranium mining. These concerns focus principally on exposure to contaminants mobilized in groundwater by the mining process. However, the risk arising as a result of mining must be viewed in light of the presence of naturally occurring uranium ore and other constituents which comprise a latent hazard. The United States Environmental Protection Agency recently proposed new guidelines for successful restoration of an in situ uranium mine by limiting concentrations of thirteen groundwater constituents: arsenic, barium, cadmium, chromium, lead, mercury, selenium, silver, nitrate (as nitrogen), molybdenum, radium, total uranium, and gross α activity. We investigated the changes occurring to these constituents at an ISR uranium mine in Wyoming, USA by comparing groundwater quality at baseline measurement to that at stability (post-restoration) testing. Of the groundwater constituents considered, only uranium and radium-226 showed significant (p < 0.05) deviation from site-wide baseline conditions in matched-wells. Uranium concentrations increased by a factor of 5.6 (95% CI 3.6-8.9 times greater) while radium-226 decreased by a factor of about one half (95% CI 0.42-0.75 times less). Change in risk was calculated using the RESRAD (onsite) code for an individual exposed as a resident-farmer; total radiation dose to a resident farmer decreased from pre-to post-mining by about 5.2 mSv y(-1). Higher concentrations of uranium correspond to increased biomarkers of nephrotoxicity, however the clinical significance of this increase is unclear. JF - Journal of environmental radioactivity AU - Ruedig, Elizabeth AU - Johnson, Thomas E AD - Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87544, USA. Electronic address: elizarue@lanl.gov. ; Colorado State University, Department of Environmental & Radiological Health Sciences, 1618 Campus Delivery, Fort Collins, CO 80523, USA. Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 170 EP - 178 VL - 150 KW - Water Pollutants, Radioactive KW - 0 KW - Uranium KW - 4OC371KSTK KW - Index Medicus KW - Risk assessment KW - Environmental impacts KW - Mining KW - Wyoming KW - Humans KW - Radiation Exposure KW - Groundwater -- analysis KW - Water Pollutants, Radioactive -- analysis KW - Uranium -- adverse effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1723756665?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+radioactivity&rft.atitle=An+evaluation+of+health+risk+to+the+public+as+a+consequence+of+in+situ+uranium+mining+in+Wyoming%2C+USA.&rft.au=Ruedig%2C+Elizabeth%3BJohnson%2C+Thomas+E&rft.aulast=Ruedig&rft.aufirst=Elizabeth&rft.date=2015-12-01&rft.volume=150&rft.issue=&rft.spage=170&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+radioactivity&rft.issn=1879-1700&rft_id=info:doi/10.1016%2Fj.jenvrad.2015.08.004 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-07-29 N1 - Date created - 2015-10-18 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.jenvrad.2015.08.004 ER - TY - JOUR T1 - Pathways and transformations of dissolved methane and dissolved inorganic carbon in Arctic tundra watersheds; evidence from analysis of stable isotopes AN - 1797535087; 2016-050700 AB - Arctic soils contain a large pool of terrestrial C and are of interest due to their potential for releasing significant carbon dioxide (CO (sub 2) ) and methane (CH (sub 4) ) to the atmosphere. Due to substantial landscape heterogeneity, predicting ecosystem-scale CH (sub 4) and CO (sub 2) production is challenging. This study assessed dissolved inorganic carbon (DIC = Sigma (total) dissolved CO (sub 2) ) and CH (sub 4) in watershed drainages in Barrow, Alaska as critical convergent zones of regional geochemistry, substrates, and nutrients. In July and September of 2013, surface waters and saturated subsurface pore waters were collected from 17 drainages. Based on simultaneous DIC and CH (sub 4) cycling, we synthesized isotopic and geochemical methods to develop a subsurface CH (sub 4) and DIC balance by estimating mechanisms of CH (sub 4) and DIC production and transport pathways and oxidation of subsurface CH (sub 4) . We observed a shift from acetoclastic (July) toward hydrogenotropic (September) methanogenesis at sites located toward the end of major freshwater drainages, adjacent to salty estuarine waters, suggesting an interesting landscape-scale effect on CH (sub 4) production mechanism. The majority of subsurface CH (sub 4) was transported upward by plant-mediated transport and ebullition, predominantly bypassing the potential for CH (sub 4) oxidation. Thus, surprisingly, CH (sub 4) oxidation only consumed approximately 2.51 + or - 0.82% (July) and 0.79 + or - 0.79% (September) of CH (sub 4) produced at the frost table, contributing to <0.1% of DIC production. DIC was primarily produced from respiration, with iron and organic matter serving as likely e- acceptors. This work highlights the importance of spatial and temporal variability of CH (sub 4) production at the watershed scale and suggests broad scale investigations are required to build better regional or pan-Arctic representations of CH (sub 4) and CO (sub 2) production. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Global Biogeochemical Cycles AU - Throckmorton, Heather M AU - Heikoop, Jeffrey M AU - Newman, Brent D AU - Altmann, Garrett L AU - Conrad, Mark S AU - Muss, Jordan D AU - Perkins, George B AU - Smith, Lydia J AU - Torn, Margaret S AU - Wullschleger, Stan D AU - Wilson, Cathy J Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 1893 EP - 1910 PB - American Geophysical Union, Washington, DC VL - 29 IS - 11 SN - 0886-6236, 0886-6236 KW - United States KW - soils KW - hydrology KW - methane KW - isotopes KW - tundra KW - isotope ratios KW - Arctic region KW - C-13/C-12 KW - aliphatic hydrocarbons KW - watersheds KW - solutes KW - alkanes KW - stable isotopes KW - geochemical cycle KW - organic compounds KW - transport KW - carbon KW - hydrocarbons KW - Alaska KW - carbon cycle KW - transformations KW - pore water KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797535087?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Global+Biogeochemical+Cycles&rft.atitle=Pathways+and+transformations+of+dissolved+methane+and+dissolved+inorganic+carbon+in+Arctic+tundra+watersheds%3B+evidence+from+analysis+of+stable+isotopes&rft.au=Throckmorton%2C+Heather+M%3BHeikoop%2C+Jeffrey+M%3BNewman%2C+Brent+D%3BAltmann%2C+Garrett+L%3BConrad%2C+Mark+S%3BMuss%2C+Jordan+D%3BPerkins%2C+George+B%3BSmith%2C+Lydia+J%3BTorn%2C+Margaret+S%3BWullschleger%2C+Stan+D%3BWilson%2C+Cathy+J&rft.aulast=Throckmorton&rft.aufirst=Heather&rft.date=2015-11-01&rft.volume=29&rft.issue=11&rft.spage=1893&rft.isbn=&rft.btitle=&rft.title=Global+Biogeochemical+Cycles&rft.issn=08866236&rft_id=info:doi/10.1002%2F2014GB005044 L2 - http://www.agu.org/journals/gb/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 79 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-06-17 N1 - SubjectsTermNotLitGenreText - Alaska; aliphatic hydrocarbons; alkanes; Arctic region; C-13/C-12; carbon; carbon cycle; geochemical cycle; hydrocarbons; hydrology; isotope ratios; isotopes; methane; organic compounds; pore water; soils; solutes; stable isotopes; transformations; transport; tundra; United States; watersheds DO - http://dx.doi.org/10.1002/2014GB005044 ER - TY - JOUR T1 - Using Anderson Acceleration to Accelerate the Convergence of Neutron Transport Calculations with Anisotropic Scattering AN - 1793244615; PQ0002657735 AB - In two recent publications, it was demonstrated that the nonlinear diffusion acceleration (NDA) algorithm, a moment-based accelerator, could be modified to accelerate the solution to neutron transport calculations with anisotropic scattering. It was demonstrated, however, that as the scattering became less isotropic, the performance of the algorithm degraded. Furthermore, it has been shown that Anderson acceleration (AA) could be used to speed up neutron transport and plasma physics calculations. In this paper, we combine these ideas to demonstrate that AA can be used to remedy the degraded performance of NDA when scattering is anisotropic. We describe each of the methods in detail and demonstrate the results on a series of fixed-source calculations and a pair of k-eigenvalue calculations. JF - Nuclear Science and Engineering AU - Willert, Jeffrey AU - Park, H AU - Taitano, William AD - Los Alamos National Laboratory, Theoretical Division, MS B216, Los Alamos, New Mexico 87545 Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 342 EP - 350 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 181 IS - 3 SN - 0029-5639, 0029-5639 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Scattering KW - Anisotropy KW - Degradation KW - Transport KW - Algorithms KW - Accelerators KW - Acceleration KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793244615?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Science+and+Engineering&rft.atitle=Using+Anderson+Acceleration+to+Accelerate+the+Convergence+of+Neutron+Transport+Calculations+with+Anisotropic+Scattering&rft.au=Willert%2C+Jeffrey%3BPark%2C+H%3BTaitano%2C+William&rft.aulast=Willert&rft.aufirst=Jeffrey&rft.date=2015-11-01&rft.volume=181&rft.issue=3&rft.spage=342&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/10.13182%2FNSE15-16 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-06-01 N1 - Number of references - 19 N1 - Last updated - 2016-06-02 DO - http://dx.doi.org/10.13182/NSE15-16 ER - TY - JOUR T1 - Applying Nonlinear Diffusion Acceleration to the Neutron Transport k-Eigenvalue Problem with Anisotropic Scattering AN - 1793241756; PQ0002657736 AB - High-order/low-order (or moment-based acceleration) algorithms have been used to significantly accelerate the solution to the neutron transport k-eigenvalue problem over the past several years. Recently, the nonlinear diffusion acceleration algorithm has been extended to solve fixed-source problems with anisotropic scattering sources. In this paper, we demonstrate that we can extend this algorithm to k-eigenvalue problems in which the scattering source is anisotropic and a significant acceleration can be achieved. Furthermore, we demonstrate that the low-order, diffusion-like eigenvalue problem can be solved efficiently using a technique known as nonlinear elimination. JF - Nuclear Science and Engineering AU - Willert, Jeffrey AU - Park, H AU - Taitano, William AD - Los Alamos National Laboratory, Theoretical Division MS B216, Los Alamos, New Mexico 87545 Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 351 EP - 360 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 181 IS - 3 SN - 0029-5639, 0029-5639 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Scattering KW - Eigenvalues KW - Anisotropy KW - Transport KW - Algorithms KW - Nonlinearity KW - Diffusion KW - Acceleration UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793241756?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Science+and+Engineering&rft.atitle=Applying+Nonlinear+Diffusion+Acceleration+to+the+Neutron+Transport+k-Eigenvalue+Problem+with+Anisotropic+Scattering&rft.au=Willert%2C+Jeffrey%3BPark%2C+H%3BTaitano%2C+William&rft.aulast=Willert&rft.aufirst=Jeffrey&rft.date=2015-11-01&rft.volume=181&rft.issue=3&rft.spage=351&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/10.13182%2FNSE14-131 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-06-01 N1 - Number of references - 15 N1 - Last updated - 2016-06-02 DO - http://dx.doi.org/10.13182/NSE14-131 ER - TY - JOUR T1 - A probabilistic analysis of cumulative carbon emissions and long-term planetary warming AN - 1787961597; PQ0002929977 AB - Efforts to mitigate and adapt to long-term climate change could benefit greatly from probabilistic estimates of cumulative carbon emissions due to fossil fuel burning and resulting CO sub(2)-induced planetary warming. Here we demonstrate the use of a reduced-form model to project these variables. We performed simulations using a large-ensemble framework with parametric uncertainty sampled to produce distributions of future cumulative emissions and consequent planetary warming. A hind-cast ensemble of simulations captured 1980-2012 historical CO sub(2) emissions trends and an ensemble of future projection simulations generated a distribution of emission scenarios that qualitatively resembled the suite of Representative and Extended Concentration Pathways. The resulting cumulative carbon emission and temperature change distributions are characterized by 5-95th percentile ranges of 0.96-4.9 teratonnes C (Tt C) and 1.4 [degrees]C-8.5 [degrees]C, respectively, with 50th percentiles at 3.1 Tt C and 4.7 [degrees]C. Within the wide range of policy-related parameter combinations that produced these distributions, we found that low-emission simulations were characterized by both high carbon prices and low costs of non-fossil fuel energy sources, suggesting the importance of these two policy levers in particular for avoiding dangerous levels of climate warming. With this analysis we demonstrate a probabilistic approach to the challenge of identifying strategies for limiting cumulative carbon emissions and assessing likelihoods of surpassing dangerous temperature thresholds. JF - Environmental Research Letters AU - Fyke, Jeremy AU - Matthews, H Damon AD - Los Alamos National Laboratory, New Mexico, USA, fyke@lanl.gov Y1 - 2015/11// PY - 2015 DA - November 2015 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 10 IS - 11 SN - 1748-9326, 1748-9326 KW - Environment Abstracts KW - Historical account KW - Fossil fuels KW - Fuels KW - Climate change KW - Emissions KW - Temperature KW - Simulation KW - Global warming KW - Burning KW - Carbon dioxide KW - Energy sources KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1787961597?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Research+Letters&rft.atitle=A+probabilistic+analysis+of+cumulative+carbon+emissions+and+long-term+planetary+warming&rft.au=Fyke%2C+Jeremy%3BMatthews%2C+H+Damon&rft.aulast=Fyke&rft.aufirst=Jeremy&rft.date=2015-11-01&rft.volume=10&rft.issue=11&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=17489326&rft_id=info:doi/10.1088%2F1748-9326%2F10%2F11%2F115007 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Historical account; Fossil fuels; Fuels; Climate change; Temperature; Emissions; Global warming; Simulation; Burning; Carbon dioxide; Energy sources DO - http://dx.doi.org/10.1088/1748-9326/10/11/115007 ER - TY - JOUR T1 - Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide AN - 1780517567; PQ0002824326 AB - Dimethyl sulfide (DMS) is a biogenic organosulfur compound which contributes strongly to marine aerosol mass and the determination of cloud condensation nuclei over the remote oceans. Since uncertainties in DMS flux to the atmosphere lead to large variations in climate forcing, the global DMS distribution has been the subject of increasingly complex dynamic simulations. DMS concentrations are directly controlled by marine ecosystems. Phaeocystis is a major DMS producer but is often omitted from global reduced sulfur mechanisms. Here we incorporate this phytoplankton group into the marine ecosystem-biogeochemical module of the Community Earth System Model. To examine its role in the ocean sulfur cycle, an earlier DMS model has been enhanced to include new knowledge gained over the last few years. Results from the baseline run show that simulated Phaeocystis biomass generally agrees with observations, with high concentrations near the Antarctic continent and between 50 degree and 60 degree north. Given the new explicit Phaeocystis representation, the DMS distribution shows significant improvements, especially regarding the amplitude and location of high-latitude peaks. The simulated global mean surface DMS value is 2.26nM, comparable to an estimate of 2.34nM from the latest climatology extrapolated based on observations. The total oceanic DMS source to the atmosphere is 20.4TgS/yr, on the low side of previous estimates. Comparisons with and without Phaeocystis show that the group dominates DMS distributions in temperate and cold waters, contributing 13% of the global flux. The proportion may increase as sea ice declines and should be considered in climate projections. Key Points * A detailed DMS model is updated with explicit global Phaeocystis ecology * Simulated distributions of DMS flux and concentration are improved * The role of Phaeocystis in the global sulfur cycle is evaluated JF - Journal of Geophysical Research. G. Biogeosciences AU - Wang, Shanlin AU - Elliott, Scott AU - Maltrud, Mathew AU - Cameron-Smith, Philip AD - Climate Ocean and Sea Ice Modeling Group, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 2158 EP - 2177 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 120 IS - 11 SN - 2169-8953, 2169-8953 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Ecology Abstracts KW - Sulfur KW - Sulphur KW - organosulfur compounds KW - Ecological distribution KW - Climate change KW - Phytoplankton KW - Atmosphere KW - Phaeocystis KW - Models KW - Sulphides KW - Sulfur Cycle KW - Ocean-atmosphere system KW - Marine ecosystems KW - Climatology KW - Nuclei KW - Modelling KW - Marine KW - Dimethyl sulfide KW - Aerosols KW - Climates KW - Sulfides KW - Climate KW - Brackish KW - Biomass KW - Clouds KW - Sea ice KW - Oceans KW - Atmospheric forcing KW - Condensation KW - Fluctuations KW - Q2 09262:Methods and instruments KW - SW 0810:General KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780517567?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research.+G.+Biogeosciences&rft.atitle=Influence+of+explicit+Phaeocystis+parameterizations+on+the+global+distribution+of+marine+dimethyl+sulfide&rft.au=Wang%2C+Shanlin%3BElliott%2C+Scott%3BMaltrud%2C+Mathew%3BCameron-Smith%2C+Philip&rft.aulast=Wang&rft.aufirst=Shanlin&rft.date=2015-11-01&rft.volume=120&rft.issue=11&rft.spage=2158&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research.+G.+Biogeosciences&rft.issn=21698953&rft_id=info:doi/10.1002%2F2015JG003017 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-04-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Sulphides; Aerosols; Sulphur; Ecological distribution; Climate change; Atmospheric forcing; Ocean-atmosphere system; Climatology; Modelling; Sulfur; Dimethyl sulfide; organosulfur compounds; Climate; Phytoplankton; Biomass; Atmosphere; Models; Clouds; Sea ice; Oceans; Condensation; Marine ecosystems; Nuclei; Sulfur Cycle; Sulfides; Climates; Fluctuations; Phaeocystis; Marine; Brackish DO - http://dx.doi.org/10.1002/2015JG003017 ER - TY - JOUR T1 - Global distribution and surface activity of macromolecules in offline simulations of marine organic chemistry AN - 1753467871; PQ0002368620 AB - Organic macromolecules constitute a high percentage of remote sea spray. They enter the atmosphere through adsorption onto bubbles followed by bursting at the ocean surface, and go on to influence the chemistry of the fine mode aerosol. We present a global estimate of mixed-layer macromolecular distributions, driven by offline marine systems model output. The approach permits estimation of oceanic concentrations and bubble film surface coverages for several classes of organic compound. Mixed layer levels are computed from the output of a global ocean ecodynamics model by relating the macromolecules to standard biogeochemical tracers. Steady state is assumed for labile forms, and for longer-lived components we rely on ratios to existing transported variables. Adsorption is then represented through conventional Langmuir isotherms, with equilibria deduced from laboratory analogs. Open water concentrations locally exceed one micromolar carbon for the total of proteins, polysaccharides and refractory heteropolycondensates. The shorter-lived lipids remain confined to regions of strong biological activity. Results are evaluated against available measurements for all compound types, and agreement is generally well within an order of magnitude. Global distributions are further estimated for both fractional coverage of bubble films at the air-water interface and the two-dimensional concentration excess. Overall, we show that macromolecular mapping provides a novel tool for the comprehension of oceanic surfactant patterns. These results may prove useful in planning field experiments and assessing the potential response of surface chemical behaviors to global change. JF - Biogeochemistry AU - Ogunro, Oluwaseun O AU - Burrows, Susannah M AU - Elliott, Scott AU - Frossard, Amanda A AU - Hoffman, Forrest AU - Letscher, Robert T AU - Moore, JKeith AU - Russell, Lynn M AU - Wang, Shanlin AU - Wingenter, Oliver W AD - New Mexico Institute of Mining and Technology, Socorro, NM, 87801, USA, sme@lanl.gov Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 25 EP - 56 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 126 IS - 1-2 SN - 0168-2563, 0168-2563 KW - Sustainability Science Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts KW - Lipids KW - Tracers KW - Carbon KW - Mapping KW - Isotherms KW - Bubbles KW - Films KW - Modelling KW - Aerosols KW - Biogeochemistry KW - Mixed layer KW - Laboratories KW - Sprays KW - Simulation KW - Surface activity KW - Air-water interface KW - Model Studies KW - Behavior KW - Oceans KW - Atmospheric chemistry KW - Adsorption KW - Proteins KW - Organic compounds KW - Surfactants KW - Q2 09102:Institutes and organizations KW - SW 0810:General KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1753467871?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biogeochemistry&rft.atitle=Global+distribution+and+surface+activity+of+macromolecules+in+offline+simulations+of+marine+organic+chemistry&rft.au=Ogunro%2C+Oluwaseun+O%3BBurrows%2C+Susannah+M%3BElliott%2C+Scott%3BFrossard%2C+Amanda+A%3BHoffman%2C+Forrest%3BLetscher%2C+Robert+T%3BMoore%2C+JKeith%3BRussell%2C+Lynn+M%3BWang%2C+Shanlin%3BWingenter%2C+Oliver+W&rft.aulast=Ogunro&rft.aufirst=Oluwaseun&rft.date=2015-11-01&rft.volume=126&rft.issue=1-2&rft.spage=25&rft.isbn=&rft.btitle=&rft.title=Biogeochemistry&rft.issn=01682563&rft_id=info:doi/10.1007%2Fs10533-015-0136-x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-01-01 N1 - Number of references - 90 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Aerosols; Carbon; Mixed layer; Biogeochemistry; Atmospheric chemistry; Surface activity; Isotherms; Air-water interface; Modelling; Lipids; Sprays; Simulation; Tracers; Behavior; Oceans; Adsorption; Proteins; Organic compounds; Mapping; Surfactants; Laboratories; Bubbles; Films; Model Studies DO - http://dx.doi.org/10.1007/s10533-015-0136-x ER - TY - JOUR T1 - Climate Change and Physical Disturbance Manipulations Result in Distinct Biological Soil Crust Communities AN - 1746892671; PQ0002295855 AB - Biological soil crusts (biocrusts) colonize plant interspaces in many drylands and are critical to soil nutrient cycling. Multiple climate change and land use factors have been shown to detrimentally impact biocrusts on a macroscopic (i.e., visual) scale. However, the impact of these perturbations on the bacterial components of the biocrusts remains poorly understood. We employed multiple long-term field experiments to assess the impacts of chronic physical (foot trampling) and climatic changes (2 degree C soil warming, altered summer precipitation [wetting], and combined warming and wetting) on biocrust bacterial biomass, composition, and metabolic profile. The biocrust bacterial communities adopted distinct states based on the mechanism of disturbance. Chronic trampling decreased biomass and caused small community compositional changes. Soil warming had little effect on biocrust biomass or composition, while wetting resulted in an increase in the cyanobacterial biomass and altered bacterial composition. Warming combined with wetting dramatically altered bacterial composition and decreased Cyanobacteria abundance. Shotgun metagenomic sequencing identified four functional gene categories that differed in relative abundance among the manipulations, suggesting that climate and land use changes affected soil bacterial functional potential. This study illustrates that different types of biocrust disturbance damage biocrusts in macroscopically similar ways, but they differentially impact the resident soil bacterial communities, and the communities' functional profiles can differ depending on the disturbance type. Therefore, the nature of the perturbation and the microbial response are important considerations for management and restoration of drylands. JF - Applied and Environmental Microbiology AU - Steven, Blaire AU - Kuske, Cheryl R AU - Gallegos-Graves, La Verne AU - Reed, Sasha C AU - Belnap, Jayne AD - << + $0, kuske@lanl.gov. Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 7448 EP - 7459 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 United States VL - 81 IS - 21 SN - 0099-2240, 0099-2240 KW - Sustainability Science Abstracts; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Rainfall KW - Climate KW - Climate change KW - Climatic changes KW - Abundance KW - Relative abundance KW - Summer KW - Precipitation KW - Biomass KW - Trampling KW - Land use KW - Soil nutrients KW - Soil microorganisms KW - Soil KW - Cyanobacteria KW - Disturbance KW - M3 1010:Issues in Sustainable Development KW - A 01400:Soil Microbes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1746892671?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+and+Environmental+Microbiology&rft.atitle=Climate+Change+and+Physical+Disturbance+Manipulations+Result+in+Distinct+Biological+Soil+Crust+Communities&rft.au=Steven%2C+Blaire%3BKuske%2C+Cheryl+R%3BGallegos-Graves%2C+La+Verne%3BReed%2C+Sasha+C%3BBelnap%2C+Jayne&rft.aulast=Steven&rft.aufirst=Blaire&rft.date=2015-11-01&rft.volume=81&rft.issue=21&rft.spage=7448&rft.isbn=&rft.btitle=&rft.title=Applied+and+Environmental+Microbiology&rft.issn=00992240&rft_id=info:doi/10.1128%2FAEM.01443-15 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Number of references - 54 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Abundance; Climatic changes; Precipitation; Biomass; Soil nutrients; Land use; Trampling; Soil microorganisms; Soil; Rainfall; Climate change; Climate; Summer; Relative abundance; Disturbance; Cyanobacteria DO - http://dx.doi.org/10.1128/AEM.01443-15 ER - TY - JOUR T1 - DFNWorks; a discrete fracture network framework for modeling subsurface flow and transport AN - 1734265627; 2015-109871 AB - dfnWorks is a parallelized computational suite to generate three-dimensional discrete fracture networks (DFN) and simulate flow and transport. Developed at Los Alamos National Laboratory over the past five years, it has been used to study flow and transport in fractured media at scales ranging from millimeters to kilometers. The networks are created and meshed using dfnGen, which combines fram (the feature rejection algorithm for meshing) methodology to stochastically generate three-dimensional DFNs with the LaGriT meshing toolbox to create a high-quality computational mesh representation. The representation produces a conforming Delaunay triangulation suitable for high performance computing finite volume solvers in an intrinsically parallel fashion. Flow through the network is simulated in dfnFlow, which utilizes the massively parallel subsurface flow and reactive transport finite volume code pflotran. A Lagrangian approach to simulating transport through the DFN is adopted within dfnTrans to determine pathlines and solute transport through the DFN. Example applications of this suite in the areas of nuclear waste repository science, hydraulic fracturing and CO (sub 2) sequestration are also included. Abstract Copyright (2015) Elsevier, B.V. JF - Computers & Geosciences AU - Hyman, Jeffrey D AU - Karra, Satish AU - Makedonska, Nataliia AU - Gable, Carl W AU - Painter, Scott L AU - Viswanathan, Hari S Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 10 EP - 19 PB - Elsevier, Amsterdam VL - 84 SN - 0098-3004, 0098-3004 KW - solute transport KW - hazardous waste KW - fractured materials KW - isotopes KW - data processing KW - fluid phase KW - Europe KW - reservoir rocks KW - radioactive waste KW - carbon dioxide KW - fractures KW - radioactive isotopes KW - transport KW - movement KW - algorithms KW - systems KW - hydraulic fracturing KW - carbon sequestration KW - Western Europe KW - DFNWorks model KW - pollutants KW - structural analysis KW - solutes KW - pollution KW - fluid flow KW - porous materials KW - Forsmark Sweden KW - models KW - Scandinavia KW - physical properties KW - reservoir properties KW - waste disposal KW - Sweden KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734265627?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Geosciences&rft.atitle=DFNWorks%3B+a+discrete+fracture+network+framework+for+modeling+subsurface+flow+and+transport&rft.au=Hyman%2C+Jeffrey+D%3BKarra%2C+Satish%3BMakedonska%2C+Nataliia%3BGable%2C+Carl+W%3BPainter%2C+Scott+L%3BViswanathan%2C+Hari+S&rft.aulast=Hyman&rft.aufirst=Jeffrey&rft.date=2015-11-01&rft.volume=84&rft.issue=&rft.spage=10&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Geosciences&rft.issn=00983004&rft_id=info:doi/10.1016%2Fj.cageo.2015.08.001 L2 - http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5840&_auth=y&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=e5198452fad934c6346f38b57511c8e0 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 58 N1 - Document feature - illus. N1 - Last updated - 2015-11-19 N1 - CODEN - GGEOD5 N1 - SubjectsTermNotLitGenreText - algorithms; carbon dioxide; carbon sequestration; data processing; DFNWorks model; Europe; fluid flow; fluid phase; Forsmark Sweden; fractured materials; fractures; hazardous waste; hydraulic fracturing; isotopes; models; movement; physical properties; pollutants; pollution; porous materials; radioactive isotopes; radioactive waste; reservoir properties; reservoir rocks; Scandinavia; solute transport; solutes; structural analysis; Sweden; systems; transport; waste disposal; Western Europe DO - http://dx.doi.org/10.1016/j.cageo.2015.08.001 ER - TY - JOUR T1 - Experimental drought and heat can delay phenological development and reduce foliar and shoot growth in semiarid trees AN - 1727680514; PQ0002167797 AB - Higher temperatures associated with climate change are anticipated to trigger an earlier start to the growing season, which could increase the terrestrial C sink strength. Greater variability in the amount and timing of precipitation is also expected with higher temperatures, bringing increased drought stress to many ecosystems. We experimentally assessed the effects of higher temperature and drought on the foliar phenology and shoot growth of mature trees of two semiarid conifer species. We exposed field-grown trees to a ~45% reduction in precipitation with a rain-out structure ('drought'), a ~4.8 degree C temperature increase with open-top chambers ('heat'), and a combination of both simultaneously ('drought + heat'). Over the 2013 growing season, drought, heat, and drought + heat treatments reduced shoot and needle growth in pinon pine (Pinus edulis) by greater than or equal to 39%, while juniper (Juniperus monosperma) had low growth and little response to these treatments. Needle emergence on primary axis branches of pinon pine was delayed in heat, drought, and drought + heat treatments by 19-57 days, while secondary axis branches were less likely to produce needles in the heat treatment, and produced no needles at all in the drought + heat treatment. Growth of shoots and needles, and the timing of needle emergence correlated inversely with xylem water tension and positively with nonstructural carbohydrate concentrations. Our findings demonstrate the potential for delayed phenological development and reduced growth with higher temperatures and drought in tree species that are vulnerable to drought and reveal potential mechanistic links to physiological stress responses. Climate change projections of an earlier and longer growing season with higher temperatures, and consequent increases in terrestrial C sink strength, may be incorrect for regions where plants will face increased drought stress with climate change. JF - Global Change Biology AU - Adams, Henry D AU - Collins, Adam D AU - Briggs, Samuel P AU - Vennetier, Michel AU - Dickman, LTurin AU - Sevanto, Sanna A AU - Garcia-Forner, Nuria AU - Powers, Heath H AU - McDowell, Nate G AD - Earth and Environmental Sciences, Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM, 87545, USA. Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 4210 EP - 4220 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 21 IS - 11 SN - 1354-1013, 1354-1013 KW - Environment Abstracts; Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts; Ecology Abstracts KW - Ecosystems KW - Trees KW - Rainfall KW - Physiology KW - Climate change KW - Climatic changes KW - Drought KW - Development KW - Needles KW - Growth KW - Branches KW - Phenology KW - Vulnerability KW - Carbohydrates KW - Droughts KW - Temperature effects KW - Growing season KW - Xylem KW - Temperature KW - Stress KW - Precipitation KW - Conifers KW - Shoots KW - Heat KW - Pinus edulis KW - Juniperus monosperma KW - Heat treatments KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development KW - D 04040:Ecosystem and Ecology Studies KW - ENA 19:Water Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1727680514?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Global+Change+Biology&rft.atitle=Experimental+drought+and+heat+can+delay+phenological+development+and+reduce+foliar+and+shoot+growth+in+semiarid+trees&rft.au=Adams%2C+Henry+D%3BCollins%2C+Adam+D%3BBriggs%2C+Samuel+P%3BVennetier%2C+Michel%3BDickman%2C+LTurin%3BSevanto%2C+Sanna+A%3BGarcia-Forner%2C+Nuria%3BPowers%2C+Heath+H%3BMcDowell%2C+Nate+G&rft.aulast=Adams&rft.aufirst=Henry&rft.date=2015-11-01&rft.volume=21&rft.issue=11&rft.spage=4210&rft.isbn=&rft.btitle=&rft.title=Global+Change+Biology&rft.issn=13541013&rft_id=info:doi/10.1111%2Fgcb.13030 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-10-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Temperature effects; Trees; Xylem; Climatic changes; Stress; Development; Precipitation; Shoots; Conifers; Phenology; Branches; Heat; Carbohydrates; Heat treatments; Droughts; Growing season; Ecosystems; Climate change; Drought; Rainfall; Physiology; Temperature; Needles; Growth; Vulnerability; Pinus edulis; Juniperus monosperma DO - http://dx.doi.org/10.1111/gcb.13030 ER - TY - JOUR T1 - Reactivation of Kamb ice stream tributaries triggers century-scale reorganization of Siple Coast ice flow in West Antarctica AN - 1800392151; 2016-055283 AB - Ongoing, centennial-scale flow variability within the Ross ice streams of West Antarctica suggests that the present-day positive mass balance in this region may reverse in the future. Here we use a three-dimensional ice sheet model to simulate ice flow in this region over 250 years. The flow responds to changing basal properties, as a subglacial till layer interacts with water transported in an active subglacial hydrological system. We show that a persistent weak bed beneath the tributaries of the dormant Kamb Ice Stream is a source of internal ice flow instability, which reorganizes all ice streams in this region, leading to a reduced (positive) mass balance within decades and a net loss of ice within two centuries. This hitherto unaccounted for flow variability could raise sea level by 5 mm this century. Better constraints on future sea level change from this region will require improved estimates of geothermal heat flux and subglacial water transport. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Bougamont, M AU - Christoffersen, P AU - Price, S F AU - Fricker, H A AU - Tulaczyk, S AU - Carter, S P Y1 - 2015/10/28/ PY - 2015 DA - 2015 Oct 28 SP - 8471 EP - 8480 PB - American Geophysical Union, Washington, DC VL - 42 IS - 20 SN - 0094-8276, 0094-8276 KW - hydrology KW - West Antarctica KW - three-dimensional models KW - subglacial processes KW - Kamb ice stream KW - global change KW - climate change KW - ice movement KW - Antarctica KW - ice streams KW - mass balance KW - climate effects KW - glacial geology KW - Ross Ice Shelf KW - Siple Coast KW - global warming KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392151?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Reactivation+of+Kamb+ice+stream+tributaries+triggers+century-scale+reorganization+of+Siple+Coast+ice+flow+in+West+Antarctica&rft.au=Bougamont%2C+M%3BChristoffersen%2C+P%3BPrice%2C+S+F%3BFricker%2C+H+A%3BTulaczyk%2C+S%3BCarter%2C+S+P&rft.aulast=Bougamont&rft.aufirst=M&rft.date=2015-10-28&rft.volume=42&rft.issue=20&rft.spage=8471&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2015GL065782 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 36 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2016-06-30 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - Antarctica; climate change; climate effects; glacial geology; global change; global warming; hydrology; ice movement; ice streams; Kamb ice stream; mass balance; Ross Ice Shelf; Siple Coast; subglacial processes; three-dimensional models; West Antarctica DO - http://dx.doi.org/10.1002/2015GL065782 ER - TY - JOUR T1 - Room Temperature Single-Photon Emission from Individual Perovskite Quantum Dots. AN - 1727985259; 26312994 AB - Lead-halide-based perovskites have been the subject of numerous recent studies largely motivated by their exceptional performance in solar cells. Electronic and optical properties of these materials have been commonly controlled by varying the composition (e.g., the halide component) and/or crystal structure. Use of nanostructured forms of perovskites can provide additional means for tailoring their functionalities via effects of quantum confinement and wave function engineering. Furthermore, it may enable applications that explicitly rely on the quantum nature of electronic excitations. Here, we demonstrate that CsPbX3 quantum dots (X = I, Br) can serve as room-temperature sources of quantum light, as indicated by strong photon antibunching detected in single-dot photoluminescence measurements. We explain this observation by the presence of fast nonradiative Auger recombination, which renders multiexciton states virtually nonemissive and limits the fraction of photon coincidence events to ∼6% on average. We analyze limitations of these quantum dots associated with irreversible photodegradation and fluctuations ("blinking") of the photoluminescence intensity. On the basis of emission intensity-lifetime correlations, we assign the "blinking" behavior to random charging/discharging of the quantum dot driven by photoassisted ionization. This study suggests that perovskite quantum dots hold significant promise for applications such as quantum emitters; however, to realize this goal, one must resolve the problems of photochemical stability and photocharging. These problems are largely similar to those of more traditional quantum dots and, hopefully, can be successfully resolved using advanced methodologies developed over the years in the field of colloidal nanostructures. JF - ACS nano AU - Park, Young-Shin AU - Guo, Shaojun AU - Makarov, Nikolay S AU - Klimov, Victor I AD - Chemistry Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States. Y1 - 2015/10/27/ PY - 2015 DA - 2015 Oct 27 SP - 10386 EP - 10393 VL - 9 IS - 10 KW - Auger recombination KW - photoionization KW - blinking KW - photoluminescence intermittency KW - photon antibunching KW - perovskite KW - nanocrystal KW - quantum dot UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1727985259?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Room+Temperature+Single-Photon+Emission+from+Individual+Perovskite+Quantum+Dots.&rft.au=Park%2C+Young-Shin%3BGuo%2C+Shaojun%3BMakarov%2C+Nikolay+S%3BKlimov%2C+Victor+I&rft.aulast=Park&rft.aufirst=Young-Shin&rft.date=2015-10-27&rft.volume=9&rft.issue=10&rft.spage=10386&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Facsnano.5b04584 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-01-26 N1 - Date created - 2015-10-27 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsnano.5b04584 ER - TY - JOUR T1 - An improved thermodynamic model for the complexation of trivalent actinides and lanthanide with oxalic acid valid to high ionic strength AN - 1769963705; 2016-018594 AB - The dissociation constants of oxalic acid (Ox), and the stability constants of Am (super 3+) , Cm (super 3+) and Eu (super 3+) with Ox (super 2-) have been determined at 25 degrees C, over a range of concentration varying from 0.1 to 6.60 m NaClO (sub 4) using potentiometric titration and extraction techniques, respectively. The experimental data support the formation of complexes, M(Ox) (sub n) (super 3-2n) , where (M = Am (super 3+) , Cm (super 3+) and Eu (super 3+) and n = 1 and 2). The dissociation constant and the stability constant values measured as a function of NaClO (sub 4) concentration were used to estimate the Pitzer parameters for the respective interactions of Am (super 3+) , Cm (super 3+) and Eu (super 3+) with Ox. Furthermore, the stability constants data of Am (super 3+) -Ox measured in NaClO (sub 4) and in NaCl solutions from the literature were simultaneously fitted in order to refine the existing actinide-oxalate complexation model that can be used universally in the safety assessment of radioactive waste disposal. The thermodynamic stability constant: log beta (super 0) (sub 101) = 6.30 + or - 0.06 and log beta (super 0) (sub 102) = 10.84 + or - 0.06 for Am (super 3+) was obtained by simultaneously fitting data in NaCl and NaClO (sub 4) media. Additionally, log beta (super 0) (sub 101) = 6.72 + or - 0.08 and log beta (super 0) (sub 102) = 11.05 + or - 0.09 for the Cm (super 3+) and log beta (super 0) (sub 101) = 6.67 + or - 0.08 and log beta (super 0) (sub 102) = 11.15 + or - 0.09 for the Eu (super 3+) were calculated by extrapolation of data to zero ionic strength in NaClO (sub 4) medium only. For all stability constants, the Pitzer model gives an excellent representation of the data using interaction parameters beta (super (0)) , beta (super (1)) , and C (super Phi ) determined in this work. The thermodynamic model developed in this work will be useful in accurately modeling the potential solubility of trivalent actinides and early lanthanides to ionic strength of 6.60 m in low temperature environments in the presence of Ox. The work is also applicable to the accurate modeling transport of rare earth elements in various environments under the surface conditions. Abstract Copyright (2015) Elsevier, B.V. JF - Chemical Geology AU - Thakur, Punam AU - Xiong, Yongliang AU - Borkowski, Marian Y1 - 2015/10/15/ PY - 2015 DA - 2015 Oct 15 SP - 7 EP - 17 PB - Elsevier, Amsterdam VL - 413 SN - 0009-2541, 0009-2541 KW - hazardous waste KW - isotopes KW - complexing KW - curium KW - radioactivity methods KW - radioactive waste KW - environmental management KW - laboratory studies KW - reactivity KW - radioactive isotopes KW - phase equilibria KW - carboxylic acids KW - valency KW - rare earths KW - europium KW - thermodynamic properties KW - pH KW - experimental studies KW - acids KW - oxalic acid KW - titration KW - pollutants KW - geophysical methods KW - pollution KW - models KW - organic compounds KW - organic acids KW - metals KW - mathematical methods KW - americium KW - waste disposal KW - actinides KW - accuracy KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963705?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=An+improved+thermodynamic+model+for+the+complexation+of+trivalent+actinides+and+lanthanide+with+oxalic+acid+valid+to+high+ionic+strength&rft.au=Thakur%2C+Punam%3BXiong%2C+Yongliang%3BBorkowski%2C+Marian&rft.aulast=Thakur&rft.aufirst=Punam&rft.date=2015-10-15&rft.volume=413&rft.issue=&rft.spage=7&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2015.07.029 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 78 N1 - Document feature - illus. incl. 6 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-03-03 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - accuracy; acids; actinides; americium; carboxylic acids; complexing; curium; environmental management; europium; experimental studies; geophysical methods; hazardous waste; isotopes; laboratory studies; mathematical methods; metals; models; organic acids; organic compounds; oxalic acid; pH; phase equilibria; pollutants; pollution; radioactive isotopes; radioactive waste; radioactivity methods; rare earths; reactivity; thermodynamic properties; titration; valency; waste disposal DO - http://dx.doi.org/10.1016/j.chemgeo.2015.07.029 ER - TY - JOUR T1 - Deposition, exhumation, and paleoclimate of an ancient lake deposit, Gale Crater, Mars AN - 1734265557; 2015-110053 AB - The landforms of northern Gale crater on Mars expose thick sequences of sedimentary rocks. Based on images obtained by the Curiosity rover, we interpret these outcrops as evidence for past fluvial, deltaic, and lacustrine environments. Degradation of the crater wall and rim probably supplied these sediments, which advanced inward from the wall, infilling both the crater and an internal lake basin to a thickness of at least 75 meters. This intracrater lake system probably existed intermittently for thousands to millions of years, implying a relatively wet climate that supplied moisture to the crater rim and transported sediment via streams into the lake basin. The deposits in Gale crater were then exhumed, probably by wind-driven erosion, creating Aeolis Mons (Mount Sharp). JF - Science AU - Grotzinger, J P AU - Gupta, S AU - Malin, M C AU - Rubin, D M AU - Schieber, J AU - Siebach, K AU - Sumner, D Y AU - Stack, K M AU - Vasavada, A R AU - Arvidson, R E AU - Calef, F, III AU - Edgar, L AU - Fischer, W F AU - Grant, J A AU - Griffes, J AU - Kah, L C AU - Lamb, Michael P AU - Lewis, K W AU - Mangold, N AU - Minitti, M E AU - Palucis, M AU - Rice, M AU - Williams, R M E AU - Yingst, R A AU - Blake, D AU - Blaney, D AU - Conrad, P AU - Crisp, J AU - Dietrich, W E AU - Dromart, G AU - Edgett, K S AU - Ewing, R C AU - Gellert, R AU - Hurowitz, J A AU - Kocurek, G AU - Mahaffy, P AU - McBride, M J AU - McLennan, S M AU - Mischna, M AU - Ming, D AU - Milliken, R AU - Newsom, H AU - Oehler, D AU - Parker, T J AU - Vaniman, D AU - Wiens, R C AU - Wilson, S A Y1 - 2015/10/09/ PY - 2015 DA - 2015 Oct 09 SP - 177 PB - American Association for the Advancement of Science, Washington, DC VL - 350 IS - 6257 SN - 0036-8075, 0036-8075 KW - water KW - impact features KW - Mars KW - paleoclimatology KW - Gale Crater KW - terrestrial planets KW - models KW - Aeolis Mons KW - planets KW - sedimentary rocks KW - paleoenvironment KW - Curiosity Rover KW - Mars Science Laboratory Mission KW - lacustrine environment KW - exhumation KW - outcrops KW - impact craters KW - depositional environment KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734265557?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science&rft.atitle=Deposition%2C+exhumation%2C+and+paleoclimate+of+an+ancient+lake+deposit%2C+Gale+Crater%2C+Mars&rft.au=Grotzinger%2C+J+P%3BGupta%2C+S%3BMalin%2C+M+C%3BRubin%2C+D+M%3BSchieber%2C+J%3BSiebach%2C+K%3BSumner%2C+D+Y%3BStack%2C+K+M%3BVasavada%2C+A+R%3BArvidson%2C+R+E%3BCalef%2C+F%2C+III%3BEdgar%2C+L%3BFischer%2C+W+F%3BGrant%2C+J+A%3BGriffes%2C+J%3BKah%2C+L+C%3BLamb%2C+Michael+P%3BLewis%2C+K+W%3BMangold%2C+N%3BMinitti%2C+M+E%3BPalucis%2C+M%3BRice%2C+M%3BWilliams%2C+R+M+E%3BYingst%2C+R+A%3BBlake%2C+D%3BBlaney%2C+D%3BConrad%2C+P%3BCrisp%2C+J%3BDietrich%2C+W+E%3BDromart%2C+G%3BEdgett%2C+K+S%3BEwing%2C+R+C%3BGellert%2C+R%3BHurowitz%2C+J+A%3BKocurek%2C+G%3BMahaffy%2C+P%3BMcBride%2C+M+J%3BMcLennan%2C+S+M%3BMischna%2C+M%3BMing%2C+D%3BMilliken%2C+R%3BNewsom%2C+H%3BOehler%2C+D%3BParker%2C+T+J%3BVaniman%2C+D%3BWiens%2C+R+C%3BWilson%2C+S+A&rft.aulast=Grotzinger&rft.aufirst=J&rft.date=2015-10-09&rft.volume=350&rft.issue=6257&rft.spage=177&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.aac7575 L2 - http://www.sciencemag.org/magazine LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 103 N1 - PubXState - DC N1 - Document feature - illus. incl. strat. cols., geol. sketch maps N1 - SuppNotes - Full text available only online N1 - Last updated - 2015-11-19 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - Aeolis Mons; Curiosity Rover; depositional environment; exhumation; Gale Crater; impact craters; impact features; lacustrine environment; Mars; Mars Science Laboratory Mission; models; outcrops; paleoclimatology; paleoenvironment; planets; sedimentary rocks; terrestrial planets; water DO - http://dx.doi.org/10.1126/science.aac7575 ER - TY - JOUR T1 - Tremor-genic slow slip regions may be deeper and warmer and may slip slower than non-tremor-genic regions AN - 1873351020; 2017-015030 AB - Slow slip events (SSEs) are observed worldwide and often coincide with tectonic tremor. Notable examples of SSEs lacking observed tectonic tremor, however, occur beneath Kilauea Volcano, Hawaii, the Boso Peninsula, Japan, near San Juan Bautista on the San Andreas Fault, California, and recently in Central Ecuador. These SSEs are similar to other worldwide SSEs in many ways (e.g., size or duration), but lack the concurrent tectonic tremor observed elsewhere; instead, they trigger swarms of regular earthquakes. We investigate the physical conditions that may distinguish these non-tremor-genic SSEs from those associated with tectonic tremor, including slip velocity, pressure, temperature, fluids, and fault asperities, although we cannot eliminate the possibility that tectonic tremor may be obscured in highly attenuating regions. Slip velocities of SSEs at Kilauea Volcano ( approximately 10 (super -6) m/s) and Boso Peninsula ( approximately 10 (super -7) m/s) are among the fastest SSEs worldwide. Kilauea Volcano, the Boso Peninsula, and Central Ecuador are also among the shallowest SSEs worldwide, and thus have lower confining pressures and cooler temperatures in their respective slow slip zones. Fluids also likely contribute to tremor generation, and no corresponding zone of high v (sub p) /v (sub s) has been noted at Kilauea or Boso. We suggest that the relatively faster slip velocities at Kilauea Volcano and the Boso Peninsula result from specific physical conditions that may also be responsible for triggering swarms of regular earthquakes adjacent to the slow slip, while different conditions produce slower SSE velocities elsewhere and trigger tectonic tremor. Abstract Copyright (2015). American Geophysical Union. All Rights Reserved. JF - Geochemistry, Geophysics, Geosystems - G3 AU - Montgomery-Brown, E K AU - Syracuse, E M Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 3593 EP - 3606 PB - American Geophysical Union and The Geochemical Society VL - 16 IS - 10 KW - United States KW - Hawaii Island KW - Far East KW - Ecuador KW - mechanism KW - slip rates KW - California KW - seismicity KW - tectonics KW - Kilauea KW - Asia KW - San Juan Bautista California KW - seismotectonics KW - faults KW - Hawaii County Hawaii KW - Hawaii KW - East Pacific Ocean Islands KW - South America KW - San Andreas Fault KW - Oceania KW - volcanoes KW - San Benito County California KW - Polynesia KW - Honshu KW - Chiba Peninsula KW - earthquakes KW - Japan KW - 19:Seismology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873351020?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochemistry%2C+Geophysics%2C+Geosystems+-+G3&rft.atitle=Tremor-genic+slow+slip+regions+may+be+deeper+and+warmer+and+may+slip+slower+than+non-tremor-genic+regions&rft.au=Montgomery-Brown%2C+E+K%3BSyracuse%2C+E+M&rft.aulast=Montgomery-Brown&rft.aufirst=E&rft.date=2015-10-01&rft.volume=16&rft.issue=10&rft.spage=3593&rft.isbn=&rft.btitle=&rft.title=Geochemistry%2C+Geophysics%2C+Geosystems+-+G3&rft.issn=1525-2027&rft_id=info:doi/10.1002%2F2015GC005895 L2 - http://g-cubed.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom | Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2017-01-01 N1 - Number of references - 108 N1 - Document feature - illus. N1 - Last updated - 2017-03-02 N1 - SubjectsTermNotLitGenreText - Asia; California; Chiba Peninsula; earthquakes; East Pacific Ocean Islands; Ecuador; Far East; faults; Hawaii; Hawaii County Hawaii; Hawaii Island; Honshu; Japan; Kilauea; mechanism; Oceania; Polynesia; San Andreas Fault; San Benito County California; San Juan Bautista California; seismicity; seismotectonics; slip rates; South America; tectonics; United States; volcanoes DO - http://dx.doi.org/10.1002/2015GC005895 ER - TY - JOUR T1 - Tremor-genic slow slip regions may be deeper and warmer and may slip slower than non-tremor-genic regions AN - 1832666814; 766406-14 AB - Slow slip events (SSEs) are observed worldwide and often coincide with tectonic tremor. Notable examples of SSEs lacking observed tectonic tremor, however, occur beneath Kilauea Volcano, Hawaii, the Boso Peninsula, Japan, near San Juan Bautista on the San Andreas Fault, California, and recently in Central Ecuador. These SSEs are similar to other worldwide SSEs in many ways (e.g., size or duration), but lack the concurrent tectonic tremor observed elsewhere; instead, they trigger swarms of regular earthquakes. We investigate the physical conditions that may distinguish these non-tremor-genic SSEs from those associated with tectonic tremor, including slip velocity, pressure, temperature, fluids, and fault asperities, although we cannot eliminate the possibility that tectonic tremor may be obscured in highly attenuating regions. Slip velocities of SSEs at Kilauea Volcano ( approximately 10 (super -6) m/s) and Boso Peninsula ( approximately 10 (super -7) m/s) are among the fastest SSEs worldwide. Kilauea Volcano, the Boso Peninsula, and Central Ecuador are also among the shallowest SSEs worldwide, and thus have lower confining pressures and cooler temperatures in their respective slow slip zones. Fluids also likely contribute to tremor generation, and no corresponding zone of high v (sub p) /v (sub s) has been noted at Kilauea or Boso. We suggest that the relatively faster slip velocities at Kilauea Volcano and the Boso Peninsula result from specific physical conditions that may also be responsible for triggering swarms of regular earthquakes adjacent to the slow slip, while different conditions produce slower SSE velocities elsewhere and trigger tectonic tremor. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Geochemistry, Geophysics, Geosystems - G3 AU - Montgomery-Brown, E K AU - Syracuse, E M Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 3593 EP - 3606 PB - American Geophysical Union and The Geochemical Society VL - 16 IS - 10 KW - United States KW - Hawaii Island KW - Far East KW - Ecuador KW - mechanism KW - slip rates KW - California KW - seismicity KW - tectonics KW - Kilauea KW - Asia KW - San Juan Bautista California KW - seismotectonics KW - faults KW - Hawaii County Hawaii KW - Hawaii KW - East Pacific Ocean Islands KW - South America KW - San Andreas Fault KW - Oceania KW - volcanoes KW - San Benito County California KW - Polynesia KW - Honshu KW - Chiba Peninsula KW - earthquakes KW - Japan KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832666814?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochemistry%2C+Geophysics%2C+Geosystems+-+G3&rft.atitle=Tremor-genic+slow+slip+regions+may+be+deeper+and+warmer+and+may+slip+slower+than+non-tremor-genic+regions&rft.au=Montgomery-Brown%2C+E+K%3BSyracuse%2C+E+M&rft.aulast=Montgomery-Brown&rft.aufirst=E&rft.date=2015-10-01&rft.volume=16&rft.issue=10&rft.spage=3593&rft.isbn=&rft.btitle=&rft.title=Geochemistry%2C+Geophysics%2C+Geosystems+-+G3&rft.issn=1525-2027&rft_id=info:doi/10.1002%2F2015GC005895 L2 - http://g-cubed.org LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Number of references - 108 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - Asia; California; Chiba Peninsula; earthquakes; East Pacific Ocean Islands; Ecuador; Far East; faults; Hawaii; Hawaii County Hawaii; Hawaii Island; Honshu; Japan; Kilauea; mechanism; Oceania; Polynesia; San Andreas Fault; San Benito County California; San Juan Bautista California; seismicity; seismotectonics; slip rates; South America; tectonics; United States; volcanoes DO - http://dx.doi.org/10.1002/2015GC005895 ER - TY - JOUR T1 - Particle tracking approach for transport in three-dimensional discrete fracture networks; particle tracking in 3-D DFNs AN - 1824215296; 2016-084521 AB - The discrete fracture network (DFN) model is a method to mimic discrete pathways for fluid flow through a fractured low-permeable rock mass, and may be combined with particle tracking simulations to address solute transport. However, experience has shown that it is challenging to obtain accurate transport results in three-dimensional DFNs because of the high computational burden and difficulty in constructing a high-quality unstructured computational mesh on simulated fractures. We present a new particle tracking capability, which is adapted to control volume (Voronoi polygons) flow solutions on unstructured grids (Delaunay triangulations) on three-dimensional DFNs. The locally mass-conserving finite-volume approach eliminates mass balance-related problems during particle tracking. The scalar fluxes calculated for each control volume face by the flow solver are used to reconstruct a Darcy velocity at each control volume centroid. The groundwater velocities can then be continuously interpolated to any point in the domain of interest. The control volumes at fracture intersections are split into four pieces, and the velocity is reconstructed independently on each piece, which results in multiple groundwater velocities at the intersection, one for each fracture on each side of the intersection line. This technique enables detailed particle transport representation through a complex DFN structure. Verified for small DFNs, the new simulation capability enables numerical experiments on advective transport in large DFNs to be performed. We demonstrate this particle transport approach on a DFN model using parameters similar to those of crystalline rock at a proposed geologic repository for spent nuclear fuel in Forsmark, Sweden. Copyright 2015 Springer International Publishing Switzerland and Springer International Publishing Switzerland (outside the USA) 2015 JF - Computational Geosciences AU - Makedonska, Nataliia AU - Painter, Scott L AU - Bui, Quan M AU - Gable, Carl W AU - Karra, Satish Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 1123 EP - 1137 PB - Springer, Dordrecht VL - 19 IS - 5 SN - 1420-0597, 1420-0597 KW - solute transport KW - Western Europe KW - three-dimensional models KW - Darcy's law KW - discrete fracture network KW - mathematical models KW - Europe KW - advection KW - simulation KW - ground water KW - Forsmark Sweden KW - models KW - case studies KW - particle tracking KW - fractures KW - Scandinavia KW - Uppsala Sweden KW - transport KW - naturally fractured reservoirs KW - mathematical methods KW - hydrodynamics KW - Sweden KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215296?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computational+Geosciences&rft.atitle=Particle+tracking+approach+for+transport+in+three-dimensional+discrete+fracture+networks%3B+particle+tracking+in+3-D+DFNs&rft.au=Makedonska%2C+Nataliia%3BPainter%2C+Scott+L%3BBui%2C+Quan+M%3BGable%2C+Carl+W%3BKarra%2C+Satish&rft.aulast=Makedonska&rft.aufirst=Nataliia&rft.date=2015-10-01&rft.volume=19&rft.issue=5&rft.spage=1123&rft.isbn=&rft.btitle=&rft.title=Computational+Geosciences&rft.issn=14200597&rft_id=info:doi/10.1007%2Fs10596-015-9525-4 L2 - http://www.springerlink.com/content/101744/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 49 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - advection; case studies; Darcy's law; discrete fracture network; Europe; Forsmark Sweden; fractures; ground water; hydrodynamics; mathematical methods; mathematical models; models; naturally fractured reservoirs; particle tracking; Scandinavia; simulation; solute transport; Sweden; three-dimensional models; transport; Uppsala Sweden; Western Europe DO - http://dx.doi.org/10.1007/s10596-015-9525-4 ER - TY - JOUR T1 - Precise relative locations for earthquakes in the Northeast Pacific region AN - 1824214549; 2016-084567 AB - Double-difference methods applied to cross-correlation measured Rayleigh wave time shifts are an effective tool to improve epicentroid locations and relative origin time shifts in remote regions. We apply these methods to seismicity offshore of southwestern Canada and the U.S. Pacific Northwest, occurring along the boundaries of the Pacific and Juan de Fuca (including the Explorer Plate and Gorda Block) Plates. The Blanco, Mendocino, Revere-Dellwood, Nootka, and Sovanco fracture zones host the majority of this seismicity, largely consisting of strike-slip earthquakes. The Explorer, Juan de Fuca, and Gorda spreading ridges join these fracture zones and host normal faulting earthquakes. Our results show that at least the moderate-magnitude activity clusters along fault strike, supporting suggestions of large variations in seismic coupling along oceanic transform faults. Our improved relative locations corroborate earlier interpretations of the internal deformation in the Explorer and Gorda Plates. North of the Explorer Plate, improved locations support models that propose northern extension of the Revere-Dellwood fault. Relocations also support interpretations that favor multiple parallel active faults along the Blanco Transform Fault Zone. Seismicity of the western half of the Blanco appears more scattered and less collinear than the eastern half, possibly related to fault maturity. We use azimuthal variations in the Rayleigh wave cross-correlation amplitude to detect and model rupture directivity for a moderate size earthquake along the eastern Blanco Fault. The observations constrain the seismogenic zone geometry and suggest a relatively narrow seismogenic zone width of 2 to 4 km. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Cleveland, K Michael AU - VanDeMark, Thomas F AU - Ammon, Charles J Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 6960 EP - 6976 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 10 SN - 2169-9313, 2169-9313 KW - East Pacific KW - double-difference method KW - Northeast Pacific KW - Juan de Fuca Plate KW - guided waves KW - statistical analysis KW - elastic waves KW - deformation KW - Rayleigh waves KW - Blanco Fault KW - surface waves KW - plate tectonics KW - seismicity KW - North Pacific KW - Gorda Plate KW - crosscorrelation KW - Pacific Ocean KW - sea-floor spreading KW - epicenters KW - seismic waves KW - Pacific Plate KW - earthquakes KW - spreading centers KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214549?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Precise+relative+locations+for+earthquakes+in+the+Northeast+Pacific+region&rft.au=Cleveland%2C+K+Michael%3BVanDeMark%2C+Thomas+F%3BAmmon%2C+Charles+J&rft.aulast=Cleveland&rft.aufirst=K&rft.date=2015-10-01&rft.volume=120&rft.issue=10&rft.spage=6960&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2015JB012161 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 85 N1 - PubXState - DC N1 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Blanco Fault; crosscorrelation; deformation; double-difference method; earthquakes; East Pacific; elastic waves; epicenters; Gorda Plate; guided waves; Juan de Fuca Plate; North Pacific; Northeast Pacific; Pacific Ocean; Pacific Plate; plate tectonics; Rayleigh waves; sea-floor spreading; seismic waves; seismicity; spreading centers; statistical analysis; surface waves DO - http://dx.doi.org/10.1002/2015JB012161 ER - TY - JOUR T1 - Poromechanics of stick-slip frictional sliding and strength recovery on tectonic faults AN - 1824214457; 2016-084564 AB - Pore fluids influence many aspects of tectonic faulting including frictional strength aseismic creep and effective stress during the seismic cycle. However, the role of pore fluid pressure during earthquake nucleation and dynamic rupture remains poorly understood. Here we report on the evolution of pore fluid pressure and porosity during laboratory stick-slip events as an analog for the seismic cycle. We sheared layers of simulated fault gouge consisting of glass beads in a double-direct shear configuration under true triaxial stresses using drained and undrained fluid conditions and effective normal stress of 5-10 MPa. Shear stress was applied via a constant displacement rate, which we varied in velocity step tests from 0.1 to 30 mu m/s. We observe net pore pressure increases, or compaction, during dynamic failure and pore pressure decreases, or dilation, during the interseismic period, depending on fluid boundary conditions. In some cases, a brief period of dilation is attendant with the onset of dynamic stick slip. Our data show that time-dependent strengthening and dynamic stress drop increase with effective normal stress and vary with fluid conditions. For undrained conditions, dilation and preseismic slip are directly related to pore fluid depressurization; they increase with effective normal stress and recurrence time. Microstructural observations confirm the role of water-activated contact growth and shear-driven elastoplastic processes at grain junctions. Our results indicate that physicochemical processes acting at grain junctions together with fluid pressure changes dictate stick-slip stress drop and interseismic creep rates and thus play a key role in earthquake nucleation and rupture propagation. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Scuderi, Marco M AU - Carpenter, Brett M AU - Johnson, Paul A AU - Marone, Chris Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 6895 EP - 6912 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 10 SN - 2169-9313, 2169-9313 KW - experimental studies KW - numerical models KW - strength KW - shear stress KW - stick-slip KW - stress KW - microstructure KW - rates KW - mechanical properties KW - displacements KW - porosity KW - laboratory studies KW - rupture KW - gouge KW - seismicity KW - tectonics KW - earthquakes KW - faults KW - fault zones KW - 19:Seismology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214457?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Poromechanics+of+stick-slip+frictional+sliding+and+strength+recovery+on+tectonic+faults&rft.au=Scuderi%2C+Marco+M%3BCarpenter%2C+Brett+M%3BJohnson%2C+Paul+A%3BMarone%2C+Chris&rft.aulast=Scuderi&rft.aufirst=Marco&rft.date=2015-10-01&rft.volume=120&rft.issue=10&rft.spage=6895&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2015JB011983 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 67 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - displacements; earthquakes; experimental studies; fault zones; faults; gouge; laboratory studies; mechanical properties; microstructure; numerical models; porosity; rates; rupture; seismicity; shear stress; stick-slip; strength; stress; tectonics DO - http://dx.doi.org/10.1002/2015JB011983 ER - TY - JOUR T1 - Effect of advective flow in fractures and matrix diffusion on natural gas production AN - 1790968019; PQ0003082000 AB - Although hydraulic fracturing has been used for natural gas production for the past couple of decades, there are significant uncertainties about the underlying mechanisms behind the production curves that are seen in the field. A discrete fracture network-based reservoir-scale work flow is used to identify the relative effect of flow of gas in fractures and matrix diffusion on the production curve. With realistic three-dimensional representations of fracture network geometry and aperture variability, simulated production decline curves qualitatively resemble observed production decline curves. The high initial peak of the production curve is controlled by advective fracture flow of free gas within the network and is sensitive to the fracture aperture variability. Matrix diffusion does not significantly affect the production decline curve in the first few years, but contributes to production after approximately 10 years. These results suggest that the initial flushing of gas-filled background fractures combined with highly heterogeneous flow paths to the production well are sufficient to explain observed initial production decline. These results also suggest that matrix diffusion may support reduced production over longer time frames. Key Points: * Initial fast decline in gas production is due to flushing of gas from fractures * Production curve is insensitive to local aperture variability within a fracture * Matrix diffusion can improve gas production at later times JF - Water Resources Research AU - Karra, Satish AU - Makedonska, Nataliia AU - Viswanathan, Hari S AU - Painter, Scott L AU - Hyman, Jeffrey D AD - Computational Earth Science Group, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 8646 EP - 8657 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 51 IS - 10 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Variability KW - Water reservoirs KW - Oil and gas industry KW - Fractures KW - Water resources KW - Hydraulic Fracturing KW - Advective flow KW - Natural gas KW - Natural Gas KW - Gas production KW - Networks KW - Flushing KW - Water resources research KW - AQ 00001:Water Resources and Supplies KW - Q2 09127:General papers on resources KW - M2 556.18:Water Management (556.18) KW - SW 6010:Structures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1790968019?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Effect+of+advective+flow+in+fractures+and+matrix+diffusion+on+natural+gas+production&rft.au=Karra%2C+Satish%3BMakedonska%2C+Nataliia%3BViswanathan%2C+Hari+S%3BPainter%2C+Scott+L%3BHyman%2C+Jeffrey+D&rft.aulast=Karra&rft.aufirst=Satish&rft.date=2015-10-01&rft.volume=51&rft.issue=10&rft.spage=8646&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2014WR016829 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Water reservoirs; Oil and gas industry; Gas production; Fractures; Water resources; Flushing; Natural gas; Advective flow; Water resources research; Natural Gas; Variability; Networks; Hydraulic Fracturing DO - http://dx.doi.org/10.1002/2014WR016829 ER - TY - JOUR T1 - Reaction and diffusion at the reservoir/shale interface during CO (sub 2) storage; impact of geochemical kinetics AN - 1765869413; 2016-015990 AB - We use a reactive diffusion model to investigate what happens to CO (sub 2) injected into a subsurface sandstone reservoir capped by a chlorite- and illite-containing shale seal. The calculations simulate reaction and transport of supercritical (SC) CO (sub 2) at 348.15 K and 30 MPa up to 20,000 a. Given the low shale porosity (5%), chemical reactions mostly occurred in the sandstone for the first 2000 a with some precipitation at the ss/sh interface. From 2000 to 4000 a, ankerite, dolomite and illite began replacing Mg-Fe chlorite at the sandstone/shale interface. Transformation of chlorite to ankerite is the dominant reaction occluding the shale porosity in most simulations: from 4000 to 7500 a, this carbonation seals the reservoir and terminates reaction. Overall, the carbonates (calcite, ankerite, dolomite), chlorite and goethite all remain close to local chemical equilibrium with brine. Quartz is almost inert from the point of its dissolution/precipitation. However, the rate of quartz reaction controls the long-term decline in aqueous silica activity and its evolution toward equilibrium. The reactions of feldspars and clays depend strongly on their reaction rate constants (microcline is closer to local equilibrium than albite). The timing of porosity occlusion mostly therefore depends on the kinetic constants of kaolinite and illite. For example, an increase in the kaolinite kinetic constant by 0.25 logarithmic units hastened porosity closure by 4300 a. The earliest simulated closure of porosity occurred at approximately 108 a for simulations designed as sensitivity tests for the rate constants. These simulations also emphasize that the rate of CO (sub 2) immobilization as aqueous bicarbonate (solubility trapping) or as carbonate minerals (mineral trapping) in sandstone reservoirs depends upon reaction kinetics - but the relative fraction of each trapped CO (sub 2) species only depends upon the initial chemical composition of the host sandstone. For example, at the point of porosity occlusion the fraction of bicarbonate remaining in solution depends upon the initial Na and K content in the host rock but the fraction of carbonate mineralization depends only on the Ca, Mg, Fe content. Since ankerite is the dominant mineral that occludes porosity, the dissolved concentration of ferrous iron is also an important parameter. Future efforts should focus on cross-comparisons and ground-truthing of simulations made for standard case studies as well as laboratory measurements of the reactivities of clay minerals. Abstract Copyright (2015) Elsevier, B.V. JF - Applied Geochemistry AU - Balashov, Victor N AU - Guthrie, George D AU - Lopano, Christina L AU - Hakala, J Alexandra AU - Brantley, Susan L Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 119 EP - 131 PB - Elsevier, Oxford-New York-Beijing VL - 61 SN - 0883-2927, 0883-2927 KW - silicates KW - sandstone KW - gas storage KW - simulation KW - climate change KW - reservoir rocks KW - carbon dioxide KW - air pollution KW - environmental management KW - laboratory studies KW - reactivity KW - sedimentary rocks KW - chemical reactions KW - mineral assemblages KW - thermodynamic properties KW - chlorite group KW - kinetics KW - climate KW - experimental studies KW - diffusion KW - sealing KW - carbon sequestration KW - ankerite KW - shale KW - pollutants KW - pollution KW - bicarbonate ion KW - porosity KW - clay minerals KW - models KW - chlorite KW - precipitation KW - mathematical methods KW - cap rocks KW - sheet silicates KW - reservoir properties KW - mobilization KW - greenhouse gases KW - crystal chemistry KW - clastic rocks KW - carbonates KW - 02C:Geochemistry of rocks, soils, and sediments KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765869413?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=Reaction+and+diffusion+at+the+reservoir%2Fshale+interface+during+CO+%28sub+2%29+storage%3B+impact+of+geochemical+kinetics&rft.au=Balashov%2C+Victor+N%3BGuthrie%2C+George+D%3BLopano%2C+Christina+L%3BHakala%2C+J+Alexandra%3BBrantley%2C+Susan+L&rft.aulast=Balashov&rft.aufirst=Victor&rft.date=2015-10-01&rft.volume=61&rft.issue=&rft.spage=119&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2015.05.013 L2 - http://www.sciencedirect.com/science/journal/08832927 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 76 N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-02-18 N1 - SubjectsTermNotLitGenreText - air pollution; ankerite; bicarbonate ion; cap rocks; carbon dioxide; carbon sequestration; carbonates; chemical reactions; chlorite; chlorite group; clastic rocks; clay minerals; climate; climate change; crystal chemistry; diffusion; environmental management; experimental studies; gas storage; greenhouse gases; kinetics; laboratory studies; mathematical methods; mineral assemblages; mobilization; models; pollutants; pollution; porosity; precipitation; reactivity; reservoir properties; reservoir rocks; sandstone; sealing; sedimentary rocks; shale; sheet silicates; silicates; simulation; thermodynamic properties DO - http://dx.doi.org/10.1016/j.apgeochem.2015.05.013 ER - TY - JOUR T1 - Summer of Applied Geophysical Experience (SAGE); training for our future geoscientists AN - 1756508327; 2016-005449 AB - Energy and natural resources are crucial to the sustainability of worldwide economies, security, and overall well-being. However, the future workforce in the energy and natural-resources sector is at risk, and meeting the challenges of this dwindling workforce requires well-educated geoscientists in exploration and applied geophysics and related geoscience and technology disciplines. Programs such as geophysical field courses that are supported by SEG and industry, in partnership with academic institutions and government laboratories, are important approaches to maintaining and enhancing expertise in exploration geophysics. One example of a geophysical field course devoted to educating our future workforce is the Summer of Applied Geophysical Experience (SAGE), a four-week program based in Santa Fe, New Mexico, designed to actively engage students in all phases of applied geophysical research. SAGE is a unique educational experience that combines teaching and research as a partnership among universities, industry, government agencies, and professional societies. SAGE teaches the principles and applications of refraction and reflection seismology, magnetics, gravity, GPS, heat flow, several electromagnetic (EM) methods, and ground-penetrating radar (GPR) in a field-based, hands-on setting. More than 850 students and qualified professionals have attended SAGE, many of whom have gone on to become leaders in academia, industry, and government. SAGE students are exposed to the exciting challenges that face earth scientists today, and they develop skills that are necessary to address the world's growing energy demands. Examples of SAGE research projects include mapping archaeological sites and tectonic structure and investigating water and geothermal resources in the Rio Grande rift. JF - Leading Edge (Tulsa, OK) AU - Baldridge, W Scott AU - Bedrosian, Paul A AU - Biehler, Shawn AU - Braile, Lawrence W AU - Ferguson, John F AU - Folsom, Matthew AU - Jiracek, George R AU - Kelley, Shari A AU - McPhee, Darcy K AU - Pellerin, Louise AU - Snelson, Catherine M AU - Buckner, Lisa AU - Webb, Susan Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 1214 EP - 1219 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 34 IS - 10 SN - 1070-485X, 1070-485X KW - case studies KW - programs KW - college-level education KW - SAGE KW - geophysical methods KW - education KW - Summer of Applied Geophysical Experience KW - geophysics KW - field studies KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756508327?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Leading+Edge+%28Tulsa%2C+OK%29&rft.atitle=Summer+of+Applied+Geophysical+Experience+%28SAGE%29%3B+training+for+our+future+geoscientists&rft.au=Baldridge%2C+W+Scott%3BBedrosian%2C+Paul+A%3BBiehler%2C+Shawn%3BBraile%2C+Lawrence+W%3BFerguson%2C+John+F%3BFolsom%2C+Matthew%3BJiracek%2C+George+R%3BKelley%2C+Shari+A%3BMcPhee%2C+Darcy+K%3BPellerin%2C+Louise%3BSnelson%2C+Catherine+M%3BBuckner%2C+Lisa%3BWebb%2C+Susan&rft.aulast=Baldridge&rft.aufirst=W&rft.date=2015-10-01&rft.volume=34&rft.issue=10&rft.spage=1214&rft.isbn=&rft.btitle=&rft.title=Leading+Edge+%28Tulsa%2C+OK%29&rft.issn=1070485X&rft_id=info:doi/10.1190%2Ftle34101214.1 L2 - http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1745-6592 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 12 N1 - PubXState - OK N1 - Document feature - illus. incl. sects., sketch map N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - case studies; college-level education; education; field studies; geophysical methods; geophysics; programs; SAGE; Summer of Applied Geophysical Experience DO - http://dx.doi.org/10.1190/tle34101214.1 ER - TY - JOUR T1 - Synthesis and structure of a stuffed derivative of alpha -quartz, Mg (sub 0.5) AlSiO (sub 4) AN - 1756505671; 2016-007303 AB - A structural derivative of quartz with the composition Mg (sub 0.5) AlSiO (sub 4) has been grown from glass and characterized using synchrotron X-ray diffraction (XRD), transmission electron microscopy (TEM), and (super 29) Si nuclear magnetic resonance (NMR) spectroscopy. Rietveld analysis of the XRD data indicates that the framework of Mg (sub 0.5) AlSiO (sub 4) is isostructural with alpha -quartz, rather than beta -quartz, as is consistent with previous theoretical modeling (Sternitzke and Muller 1991). Al and Si exhibit long-range disorder over the framework tetrahedral sites, indicated by the absence of the superlattice reflections corresponding to the doubling of c relative to that of quartz. Nevertheless, (super 29) Si NMR measurements show that Al and Si exhibit partial short-range order with an ordering degree of 56%. Electron diffraction reveals superlattice reflections indicative of doubled periodicities along the A: -axes. Fourier electron density maps show that Mg occupies channel sites that each are bonded to six O atoms, in contrast to the tetrahedral coordination of Li in the beta -quartz-type framework for beta -eucryptite, LiAlSiO (sub 4) . Furthermore, the concentrations of Mg in adjacent channels are different, resulting in framework distortions that generate the superstructures along A: . JF - American Mineralogist AU - Xu, Hongwu AU - Heaney, Peter J AU - Yu, Ping AU - Xu, Huifang Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 2191 EP - 2198 PB - Mineralogical Society of America, Washington, DC VL - 100 IS - 10 SN - 0003-004X, 0003-004X KW - silicates KW - eucryptite KW - magnesium KW - X-ray diffraction data KW - silica minerals KW - coordination KW - electron diffraction data KW - unit cell KW - olivine group KW - crystal structure KW - bonding KW - NMR spectra KW - synchrotron radiation KW - alpha quartz KW - orthosilicates KW - framework silicates KW - spectra KW - synthesis KW - alkaline earth metals KW - electron microscopy data KW - Rietveld refinement KW - TEM data KW - forsterite KW - nesosilicates KW - phenakite group KW - metals KW - quartz KW - lattice parameters KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756505671?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Mineralogist&rft.atitle=Synthesis+and+structure+of+a+stuffed+derivative+of+alpha+-quartz%2C+Mg+%28sub+0.5%29+AlSiO+%28sub+4%29&rft.au=Xu%2C+Hongwu%3BHeaney%2C+Peter+J%3BYu%2C+Ping%3BXu%2C+Huifang&rft.aulast=Xu&rft.aufirst=Hongwu&rft.date=2015-10-01&rft.volume=100&rft.issue=10&rft.spage=2191&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam-2015-5303 L2 - http://www.minsocam.org/MSA/AmMin/TOC/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 44 N1 - PubXState - DC N1 - Document feature - illus. incl. 7 tables N1 - Last updated - 2016-01-14 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - alkaline earth metals; alpha quartz; bonding; coordination; crystal structure; electron diffraction data; electron microscopy data; eucryptite; forsterite; framework silicates; lattice parameters; magnesium; metals; nesosilicates; NMR spectra; olivine group; orthosilicates; phenakite group; quartz; Rietveld refinement; silica minerals; silicates; spectra; synchrotron radiation; synthesis; TEM data; unit cell; X-ray diffraction data DO - http://dx.doi.org/10.2138/am-2015-5303 ER - TY - JOUR T1 - Elevated carbon dioxide is predicted to promote coexistence among competing species in a trait-based model AN - 1732822579; PQ0002230555 AB - Differential species responses to atmospheric CO sub(2) concentration (C sub(a)) could lead to quantitative changes in competition among species and community composition, with flow-on effects for ecosystem function. However, there has been little theoretical analysis of how elevated C sub(a) (eC sub(a)) will affect plant competition, or how composition of plant communities might change. Such theoretical analysis is needed for developing testable hypotheses to frame experimental research. Here, we investigated theoretically how plant competition might change under eC sub(a) by implementing two alternative competition theories, resource use theory and resource capture theory, in a plant carbon and nitrogen cycling model. The model makes several novel predictions for the impact of eC sub(a) on plant community composition. Using resource use theory, the model predicts that eC sub(a) is unlikely to change species dominance in competition, but is likely to increase coexistence among species. Using resource capture theory, the model predicts that eC sub(a) may increase community evenness. Collectively, both theories suggest that eC sub(a) will favor coexistence and hence that species diversity should increase with eC sub(a). Our theoretical analysis leads to a novel hypothesis for the impact of eC sub(a) on plant community composition. This hypothesis has potential to help guide the design and interpretation of eC sub(a) experiments. We investigated theoretically how plant competition might change under elevated carbon dioxide concentrations by implementing two alternative competition theories, resource use theory and resource capture theory, in a plant carbon and nitrogen cycling model. Use of the models allowed us to identify species traits increasing success in competition and develop several testable hypotheses that we suggest could be examined in field experiments to enhance our understanding of competitive relations under elevated carbon dioxide concentration. JF - Ecology and Evolution AU - Ali, Ashehad A AU - Medlyn, Belinda E AU - Aubier, Thomas G AU - Crous, Kristine Y AU - Reich, Peter B AD - Division of Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 4717 EP - 4733 PB - Wiley Subscription Services, Inc. VL - 5 IS - 20 SN - 2045-7758, 2045-7758 KW - Sustainability Science Abstracts; Ecology Abstracts KW - Prediction KW - Carbon cycle KW - Coexistence KW - Dominance KW - Community composition KW - Species diversity KW - Plant communities KW - Nitrogen cycle KW - Carbon dioxide KW - Experimental research KW - Competition KW - Nitrogen KW - M3 1010:Issues in Sustainable Development KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732822579?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ecology+and+Evolution&rft.atitle=Elevated+carbon+dioxide+is+predicted+to+promote+coexistence+among+competing+species+in+a+trait-based+model&rft.au=Ali%2C+Ashehad+A%3BMedlyn%2C+Belinda+E%3BAubier%2C+Thomas+G%3BCrous%2C+Kristine+Y%3BReich%2C+Peter+B&rft.aulast=Ali&rft.aufirst=Ashehad&rft.date=2015-10-01&rft.volume=5&rft.issue=20&rft.spage=4717&rft.isbn=&rft.btitle=&rft.title=Ecology+and+Evolution&rft.issn=20457758&rft_id=info:doi/10.1002%2Fece3.1733 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Last updated - 2016-02-29 N1 - SubjectsTermNotLitGenreText - Community composition; Species diversity; Carbon cycle; Plant communities; Coexistence; Carbon dioxide; Competition; Dominance; Nitrogen; Prediction; Nitrogen cycle; Experimental research DO - http://dx.doi.org/10.1002/ece3.1733 ER - TY - JOUR T1 - On infrasound generated by wind farms and its propagation in low-altitude tropospheric waveguides AN - 1732815446; PQ0002211049 AB - Infrasound from a 60-turbine wind farm was found to propagate to distances up to 90km under nighttime atmospheric conditions. Four infrasound sensor arrays were deployed in central New Mexico in February 2014; three of these arrays captured infrasound from a large wind farm. The arrays were in a linear configuration oriented southeast with 13, 54, 90, and 126km radial distances and azimuths of 166 degree , 119 degree , 113 degree , and 111 degree from the 60 1.6MW turbine Red Mesa Wind Farm, Laguna Pueblo, New Mexico, USA. Peaks at a fundamental frequency slightly below 0.9Hz and its harmonics characterize the spectrum of the detected infrasound. The generation of this signal is linked to the interaction of the blades, flow gradients, and the supporting tower. The production of wind-farm sound, its propagation, and detection at long distances can be related to the characteristics of the atmospheric boundary layer. First, under stable conditions, mostly occurring at night, winds are highly stratified, which enhances the production of thickness sound and the modulation of other higher-frequency wind turbine sounds. Second, nocturnal atmospheric conditions can create low-altitude waveguides (with altitudes on the order of hundreds of meters) allowing long-distance propagation. Third, night and early morning hours are characterized by reduced background atmospheric noise that enhances signal detectability. This work describes the characteristics of the infrasound from a quasi-continuous source with the potential for long-range propagation that could be used to monitor the lower part of the atmospheric boundary layer. Key Points * Wind turbines interact with the atmosphere and produce infrasound * Wind-farm infrasound can propagate long distances * Wind-farm infrasound could be used to probe the lower atmosphere JF - Journal of Geophysical Research: Atmospheres AU - Marcillo, Omar AU - Arrowsmith, Stephen AU - Blom, Philip AU - Jones, Kyle AD - Earth and Environmental Science, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 9855 EP - 9868 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 120 IS - 19 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - Flow KW - Farms KW - Sensors KW - Acoustic waves KW - Boundary Layers KW - Atmosphere KW - Wind turbines KW - Altitude KW - Mesas KW - Noise pollution KW - Atmospheric boundary layer KW - Wind KW - USA, New Mexico KW - Troposphere KW - Wave propagation KW - Turbines KW - Wind energy KW - Wind farm KW - Boundary layers KW - Noise KW - Wave generation KW - Q2 09243:Structure, mechanics and thermodynamics KW - M2 551.55:Wind (551.55) KW - P 0000:AIR POLLUTION KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732815446?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Atmospheres&rft.atitle=On+infrasound+generated+by+wind+farms+and+its+propagation+in+low-altitude+tropospheric+waveguides&rft.au=Marcillo%2C+Omar%3BArrowsmith%2C+Stephen%3BBlom%2C+Philip%3BJones%2C+Kyle&rft.aulast=Marcillo&rft.aufirst=Omar&rft.date=2015-10-01&rft.volume=120&rft.issue=19&rft.spage=9855&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2014JD022821 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Turbines; Sensors; Wind farm; Troposphere; Atmospheric boundary layer; Wave generation; Wave propagation; Wind turbines; Acoustic waves; Noise pollution; Altitude; Wind energy; Boundary layers; Mesas; Atmosphere; Wind; Flow; Farms; Noise; Boundary Layers; USA, New Mexico DO - http://dx.doi.org/10.1002/2014JD022821 ER - TY - JOUR T1 - Highly efficient large-area colourless luminescent solar concentrators using heavy-metal-free colloidal quantum dots. AN - 1720452532; 26301902 AB - Luminescent solar concentrators serving as semitransparent photovoltaic windows could become an important element in net zero energy consumption buildings of the future. Colloidal quantum dots are promising materials for luminescent solar concentrators as they can be engineered to provide the large Stokes shift necessary for suppressing reabsorption losses in large-area devices. Existing Stokes-shift-engineered quantum dots allow for only partial coverage of the solar spectrum, which limits their light-harvesting ability and leads to colouring of the luminescent solar concentrators, complicating their use in architecture. Here, we use quantum dots of ternary I-III-VI2 semiconductors to realize the first large-area quantum dot-luminescent solar concentrators free of toxic elements, with reduced reabsorption and extended coverage of the solar spectrum. By incorporating CuInSexS2-x quantum dots into photo-polymerized poly(lauryl methacrylate), we obtain freestanding, colourless slabs that introduce no distortion to perceived colours and are thus well suited for the realization of photovoltaic windows. Thanks to the suppressed reabsorption and high emission efficiencies of the quantum dots, we achieve an optical power efficiency of 3.2%. Ultrafast spectroscopy studies suggest that the Stokes-shifted emission involves a conduction-band electron and a hole residing in an intragap state associated with a native defect. JF - Nature nanotechnology AU - Meinardi, Francesco AU - McDaniel, Hunter AU - Carulli, Francesco AU - Colombo, Annalisa AU - Velizhanin, Kirill A AU - Makarov, Nikolay S AU - Simonutti, Roberto AU - Klimov, Victor I AU - Brovelli, Sergio AD - Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, via Cozzi 55, Milano I-20125, Italy. ; Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. ; Theoretical Division &Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 878 EP - 885 VL - 10 IS - 10 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1720452532?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+nanotechnology&rft.atitle=Highly+efficient+large-area+colourless+luminescent+solar+concentrators+using+heavy-metal-free+colloidal+quantum+dots.&rft.au=Meinardi%2C+Francesco%3BMcDaniel%2C+Hunter%3BCarulli%2C+Francesco%3BColombo%2C+Annalisa%3BVelizhanin%2C+Kirill+A%3BMakarov%2C+Nikolay+S%3BSimonutti%2C+Roberto%3BKlimov%2C+Victor+I%3BBrovelli%2C+Sergio&rft.aulast=Meinardi&rft.aufirst=Francesco&rft.date=2015-10-01&rft.volume=10&rft.issue=10&rft.spage=878&rft.isbn=&rft.btitle=&rft.title=Nature+nanotechnology&rft.issn=1748-3395&rft_id=info:doi/10.1038%2Fnnano.2015.178 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-01-21 N1 - Date created - 2015-10-07 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/nnano.2015.178 ER - TY - JOUR T1 - Modulation of FadR binding capacity for acyl-CoA fatty acids through structure-guided mutagenesis. AN - 1720451493; 26385696 AB - FadR is a versatile global regulator in Escherichia coli that controls fatty acid metabolism and thereby modulates the ability of this bacterium to grow using fatty acids or acetate as the sole carbon source. FadR regulates fatty acid metabolism in response to intra-cellular concentrations of acyl-CoA lipids. The ability of FadR to bind acyl-CoA fatty acids is thus of significant interest for the engineering of biosynthetic pathways for the production of lipid-based biofuels and commodity chemicals. Based on the available crystal structure of E. coli bound to myristoyl-CoA, we predicted amino acid positions within the effector binding pocket that would alter the ability of FadR to bind acyl-CoA fatty acids without affecting DNA binding. We utilized fluorescence polarization to characterize the in vitro binding properties of wild type and mutant FadR. We found that a Leu102Ala mutant enhanced binding of the effector, likely by increasing the size of the binding pocket for the acyl moiety of the molecule. Conversely, the elimination of the guanidine side chain (Arg213Ala and Arg213Met mutants) of the CoA moiety binding site severely diminished the ability of FadR to bind the acyl-CoA effector. These results demonstrate the ability to fine tune FadR binding capacity. The validation of an efficient method to fully characterize all the binding events involved in the specific activity (effector and DNA operator binding) of FadR has allowed us to increase our understanding of the role of specific amino acids in the binding and recognition of acyl-CoA fatty acids and will greatly facilitate efforts aimed at engineering tunable FadR regulators for synthetic biology. JF - The protein journal AU - Bacik, John-Paul AU - Yeager, Chris M AU - Twary, Scott N AU - Martí-Arbona, Ricardo AD - Bioenergy and Biome Sciences Group, Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM, 87544, USA. ; Bioenergy and Biome Sciences Group, Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM, 87544, USA. rm-a@lanl.gov. Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 359 EP - 366 VL - 34 IS - 5 KW - Bacterial Proteins KW - 0 KW - FadR protein, Bacteria KW - Fatty Acids KW - Repressor Proteins KW - Index Medicus KW - Transcription factor KW - Lipid production KW - FadR KW - Fatty acid metabolism KW - Acyl-CoA KW - Mutagenesis, Site-Directed KW - Models, Molecular KW - Apraxia, Ideomotor KW - Protein Binding KW - Binding Sites KW - Escherichia coli -- metabolism KW - Bacterial Proteins -- genetics KW - Bacterial Proteins -- chemistry KW - Repressor Proteins -- metabolism KW - Bacterial Proteins -- metabolism KW - Fatty Acids -- chemistry KW - Escherichia coli -- genetics KW - Escherichia coli -- chemistry KW - Repressor Proteins -- genetics KW - Repressor Proteins -- chemistry KW - Fatty Acids -- metabolism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1720451493?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+protein+journal&rft.atitle=Modulation+of+FadR+binding+capacity+for+acyl-CoA+fatty+acids+through+structure-guided+mutagenesis.&rft.au=Bacik%2C+John-Paul%3BYeager%2C+Chris+M%3BTwary%2C+Scott+N%3BMart%C3%AD-Arbona%2C+Ricardo&rft.aulast=Bacik&rft.aufirst=John-Paul&rft.date=2015-10-01&rft.volume=34&rft.issue=5&rft.spage=359&rft.isbn=&rft.btitle=&rft.title=The+protein+journal&rft.issn=1875-8355&rft_id=info:doi/10.1007%2Fs10930-015-9630-1 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-04-18 N1 - Date created - 2015-10-07 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1007/s10930-015-9630-1 ER - TY - JOUR T1 - Rainfall intensity-duration thresholds for the initiation of landslides in Zhejiang Province, China AN - 1734267796; 2015-109738 AB - Zhejiang Province, located in the southeast coastal region of China, is highly prone to rainfall-triggered landslides because of its geologic, geomorphologic, and climatic settings. The rainfall-landslide relationship is critically important for predicting rainfall-induced landslides. This study defines landslide-triggering rainfall intensity-duration thresholds for the entire Zhejiang region; and the 62 individual areas that comprise the region, based on 1569 shallow landslides which occurred from 1990 to 2013 and their corresponding detail rainfall records from 2457 rain gauges in the region. The results indicate that the rainfall thresholds vary spatially over the region. For rainfall durations from 1 to 24 h, the threshold tends to increase from the northwestern part of Zhejiang to its southeastern coastal region; and it is lower in the central and coastal hill-basin regions than that in the western and southern mountainous regions. Variability of the threshold in space is mainly affected by the slope-forming materials and terrain slope gradients. Different soil types have different thresholds, and the thresholds for weathered rock slides are generally higher than those for soil slides. For the soil-weathered rock on slopes, the slope gradient has no obvious influence on the thresholds when the slope angle is < 30 degrees ; the thresholds have an obviously increasing trend with the increase of slope angles in the range of slope angles from 30 to about 40 degrees ; and when slope angle is larger than about 40 degrees , the thresholds rapidly decrease with gradient on the whole. These findings will facilitate the improvement of warning systems for regional rainfall-triggered landslides. Abstract Copyright (2015) Elsevier, B.V. JF - Geomorphology AU - Ma, Tuhua AU - Li, Changjiang AU - Lu, Zhiming AU - Bao, Qiyun Y1 - 2015/09/15/ PY - 2015 DA - 2015 Sep 15 SP - 193 EP - 206 PB - Elsevier, Amsterdam VL - 245 SN - 0169-555X, 0169-555X KW - gauging KW - Far East KW - rivers and streams KW - kriging KW - landforms KW - erosion features KW - coastal plains KW - shallow depth KW - mass movements KW - drainage basins KW - Asia KW - China KW - soils KW - hydrology KW - bedrock KW - Zhejiang China KW - rainfall KW - statistical analysis KW - correlation KW - properties KW - weathering KW - landslides KW - terrains KW - mathematical methods KW - temporal distribution KW - slope stability KW - rockslides KW - 23:Geomorphology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734267796?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geomorphology&rft.atitle=Rainfall+intensity-duration+thresholds+for+the+initiation+of+landslides+in+Zhejiang+Province%2C+China&rft.au=Ma%2C+Tuhua%3BLi%2C+Changjiang%3BLu%2C+Zhiming%3BBao%2C+Qiyun&rft.aulast=Ma&rft.aufirst=Tuhua&rft.date=2015-09-15&rft.volume=245&rft.issue=&rft.spage=193&rft.isbn=&rft.btitle=&rft.title=Geomorphology&rft.issn=0169555X&rft_id=info:doi/10.1016%2Fj.geomorph.2015.05.016 L2 - http://www.sciencedirect.com/science/journal/0169555X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 40 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2015-11-19 N1 - SubjectsTermNotLitGenreText - Asia; bedrock; China; coastal plains; correlation; drainage basins; erosion features; Far East; gauging; hydrology; kriging; landforms; landslides; mass movements; mathematical methods; properties; rainfall; rivers and streams; rockslides; shallow depth; slope stability; soils; statistical analysis; temporal distribution; terrains; weathering; Zhejiang China DO - http://dx.doi.org/10.1016/j.geomorph.2015.05.016 ER - TY - JOUR T1 - Isotopic studies of the upper and middle Rio Grande; Part 2, Salt loads and human impacts in south New Mexico and West Texas AN - 1718054620; 2015-094053 JF - Chemical Geology AU - Szynkiewicz, Anna AU - Borrok, David M AU - Ganjegunte, Girisha K AU - Skrzypek, Grzegorz AU - Ma, Lin AU - Rearick, Michael S AU - Perkins, George B Y1 - 2015/09/14/ PY - 2015 DA - 2015 Sep 14 SP - 336 EP - 350 PB - Elsevier, Amsterdam VL - 411 SN - 0009-2541, 0009-2541 KW - United States KW - oxygen KW - isotopes KW - mass spectra KW - Dona Ana County New Mexico KW - New Mexico KW - salinity KW - stable isotopes KW - environmental effects KW - nitrogen KW - middle Rio Grande KW - spectra KW - Rio Grande KW - N-15/N-14 KW - isotope ratios KW - human activity KW - West Texas KW - upper Rio Grande KW - Texas KW - O-18/O-16 KW - ICP mass spectra KW - S-34/S-32 KW - metals KW - sulfur KW - Las Cruces New Mexico KW - uranium KW - actinides KW - land use KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Isotopic+studies+of+the+upper+and+middle+Rio+Grande%3B+Part+2%2C+Salt+loads+and+human+impacts+in+south+New+Mexico+and+West+Texas&rft.au=Szynkiewicz%2C+Anna%3BBorrok%2C+David+M%3BGanjegunte%2C+Girisha+K%3BSkrzypek%2C+Grzegorz%3BMa%2C+Lin%3BRearick%2C+Michael+S%3BPerkins%2C+George+B&rft.aulast=Szynkiewicz&rft.aufirst=Anna&rft.date=2015-09-14&rft.volume=411&rft.issue=&rft.spage=336&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2015.05.023 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 66 N1 - Document feature - illus. incl. 1 table, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-10-01 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - actinides; Dona Ana County New Mexico; environmental effects; human activity; ICP mass spectra; isotope ratios; isotopes; land use; Las Cruces New Mexico; mass spectra; metals; middle Rio Grande; N-15/N-14; New Mexico; nitrogen; O-18/O-16; oxygen; Rio Grande; S-34/S-32; salinity; spectra; stable isotopes; sulfur; Texas; United States; upper Rio Grande; uranium; West Texas DO - http://dx.doi.org/10.1016/j.chemgeo.2015.05.023 ER - TY - JOUR T1 - Isotopic studies of the upper and middle Rio Grande; Part 1, Importance of sulfide weathering in the riverine sulfate budget AN - 1718053222; 2015-094052 AB - In order to characterize the sulfide-derived SO (sub 4) fluxes in the Rio Grande, we collected seasonally (from 2009 to 2011) riverine, agricultural drain and groundwater samples and analyzed them for their major element chemistries and the delta (super 34) S and delta (super 18) O of dissolved SO (sub 4) . The observed variation of delta (super 34) S (- 4 to + 8 ppm) and delta (super 18) O (- 2 to + 7 ppm) in the Rio Grande mainly resulted from mixing between sulfide- and sulfate-derived SO (sub 4) of volcanic and sedimentary origin. Our S isotope mass balance suggests that the average sulfide-derived SO (sub 4) flux usually accounted for 83-94% (+ or - 10-20%) of the sulfate source in the upstream Rio Grande and decreased downstream to 45-51% because of increasing contributions of sulfate-derived SO (sub 4) . The sulfide-derived SO (sub 4) was related to snow melt in the high elevation watersheds and recycling of surficial sulfate-rich salts by episodic water activity in dry areas at lower elevations. Additionally, elevated bedrock sulfide contents in volcanic and some sedimentary terrains of the studied area have been recognized as important factors contributing to sulfide-derived SO (sub 4) in the Rio Grande. Abstract Copyright (2015) Elsevier, B.V. JF - Chemical Geology AU - Szynkiewicz, Anna AU - Borrok, David M AU - Skrzypek, Grzegorz AU - Rearick, Michael S Y1 - 2015/09/14/ PY - 2015 DA - 2015 Sep 14 SP - 323 EP - 335 PB - Elsevier, Amsterdam VL - 411 SN - 0009-2541, 0009-2541 KW - United States KW - Rio Grande KW - chemical weathering KW - oxygen KW - sulfates KW - isotopes KW - Bernalillo County New Mexico KW - isotope ratios KW - surface water KW - upper Rio Grande KW - O-18/O-16 KW - New Mexico KW - weathering KW - stable isotopes KW - ground water KW - Albuquerque New Mexico KW - S-34/S-32 KW - middle Rio Grande KW - sulfur KW - Colorado KW - sulfides KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718053222?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Isotopic+studies+of+the+upper+and+middle+Rio+Grande%3B+Part+1%2C+Importance+of+sulfide+weathering+in+the+riverine+sulfate+budget&rft.au=Szynkiewicz%2C+Anna%3BBorrok%2C+David+M%3BSkrzypek%2C+Grzegorz%3BRearick%2C+Michael+S&rft.aulast=Szynkiewicz&rft.aufirst=Anna&rft.date=2015-09-14&rft.volume=411&rft.issue=&rft.spage=323&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2015.05.022 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 65 N1 - Document feature - illus. incl. 3 tables, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-10-01 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - Albuquerque New Mexico; Bernalillo County New Mexico; chemical weathering; Colorado; ground water; isotope ratios; isotopes; middle Rio Grande; New Mexico; O-18/O-16; oxygen; Rio Grande; S-34/S-32; stable isotopes; sulfates; sulfides; sulfur; surface water; United States; upper Rio Grande; weathering DO - http://dx.doi.org/10.1016/j.chemgeo.2015.05.022 ER - TY - JOUR T1 - The challenges of modelling antibody repertoire dynamics in HIV infection AN - 1808683386; PQ0003437611 AB - Antibody affinity maturation by somatic hypermutation of B-cell immunoglobulin variable region genes has been studied for decades in various model systems using well-defined antigens. While much is known about the molecular details of the process, our understanding of the selective forces that generate affinity maturation are less well developed, particularly in the case of a co-evolving pathogen such as HIV. Despite this gap in understanding, high-throughput antibody sequence data are increasingly being collected to investigate the evolutionary trajectories of antibody lineages in HIV-infected individuals. Here, we review what is known in controlled experimental systems about the mechanisms underlying antibody selection and compare this to the observed temporal patterns of antibody evolution in HIV infection. We describe how our current understanding of antibody selection mechanisms leaves questions about antibody dynamics in HIV infection unanswered. Without a mechanistic understanding of antibody selection in the context of a co-evolving viral population, modelling and analysis of antibody sequences in HIV-infected individuals will be limited in their interpretation and predictive ability. JF - Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences AU - Luo, Shishi AU - Perelson, Alan S AD - Department of Statistics, UC Berkeley, , Berkeley, CA 94110, USA, asp@lanl.gov Y1 - 2015/09/05/ PY - 2015 DA - 2015 Sep 05 SP - 20140247 PB - Royal Society of London, 6 Carlton House Terrace London SW1Y 5AG United Kingdom VL - 370 IS - 1676 SN - 0962-8436, 0962-8436 KW - Virology & AIDS Abstracts; Ecology Abstracts KW - HIV KW - evolution KW - immunology KW - Data processing KW - Lymphocytes B KW - Leaves KW - Pathogens KW - Infection KW - Lentivirus KW - Human immunodeficiency virus KW - Reviews KW - somatic hypermutation KW - Evolution KW - Variable region KW - Immunoglobulins KW - V 22360:AIDS and HIV KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808683386?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Philosophical+Transactions+of+the+Royal+Society+of+London%2C+Series+B%3A+Biological+Sciences&rft.atitle=The+challenges+of+modelling+antibody+repertoire+dynamics+in+HIV+infection&rft.au=Luo%2C+Shishi%3BPerelson%2C+Alan+S&rft.aulast=Luo&rft.aufirst=Shishi&rft.date=2015-09-05&rft.volume=370&rft.issue=1676&rft.spage=20140247&rft.isbn=&rft.btitle=&rft.title=Philosophical+Transactions+of+the+Royal+Society+of+London%2C+Series+B%3A+Biological+Sciences&rft.issn=09628436&rft_id=info:doi/10.1098%2Frstb.2014.0247 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Last updated - 2016-10-12 N1 - SubjectsTermNotLitGenreText - Data processing; Lymphocytes B; Reviews; Leaves; somatic hypermutation; Pathogens; Infection; Evolution; Immunoglobulins; Variable region; Lentivirus; Human immunodeficiency virus DO - http://dx.doi.org/10.1098/rstb.2014.0247 ER - TY - JOUR T1 - The upper mantle geoid; implications for continental structure and the intraplate stress field AN - 1718051430; 2015-096602 AB - We use the fact that geoid anomalies are directly related to the local dipole moment of the density-depth distribution to help constrain density variations within the lithosphere and the associated tectonic stresses. The main challenge with this approach is isolating the upper mantle geoid contribution from the full geoid (which is dominated by sources in the lower mantle). We address this issue by using a high-pass spherical harmonic filtering of the EGM2008-WGS 84 geoid to produce an "upper mantle" geoid. The tectonic implications of the upper mantle are discussed in terms of plate tectonics and intraplate stresses. We find that globally there is a approximately 9 m geoid step associated with the cooling oceanic lithosphere that imparts a net force of approximately 2.5 X 10 (super 12) N/m in the form of "ridge push"-a magnitude that is consistent with one-dimensional models based on first-order density profiles. Furthermore, we find a consistent 6 m geoid step across passive continental margins which has the net effect of reducing the compressive stresses in the continents due to the ridge push force. Furthermore, we use the upper mantle geoid to reevaluate the tectonic reference state which previous studies estimated using an assumption of Airy-based isostasy. Our evaluation of the upper mantle geoid confirms the near-equivalence of the gravitational potential energy of continental lithosphere with an elevation of approximately 750 m and the mid-ocean ridges. This result substantiates early conclusions about the tectonic reference state and further supports the prediction that continental regions are expected to be in a slightly extensional state of stress. JF - Special Paper - Geological Society of America AU - Coblentz, David AU - van Wijk, Jolante AU - Richardson, Randall M AU - Sandiford, Mike Y1 - 2015/09/04/ PY - 2015 DA - 2015 Sep 04 SP - 197 EP - 214, 19 PB - Geological Society of America (GSA), Boulder, CO VL - 514 SN - 0072-1077, 0072-1077 KW - upper mantle KW - continental margin KW - density KW - lithosphere KW - passive margins KW - mantle KW - continental crust KW - stress fields KW - geodesy KW - lower mantle KW - extension KW - continental lithosphere KW - gravity field KW - plate tectonics KW - continents KW - intraplate processes KW - ocean floors KW - geoid KW - dipole moment KW - crust KW - mid-ocean ridges KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718051430?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Paper+-+Geological+Society+of+America&rft.atitle=The+upper+mantle+geoid%3B+implications+for+continental+structure+and+the+intraplate+stress+field&rft.au=Coblentz%2C+David%3Bvan+Wijk%2C+Jolante%3BRichardson%2C+Randall+M%3BSandiford%2C+Mike&rft.aulast=Coblentz&rft.aufirst=David&rft.date=2015-09-04&rft.volume=514&rft.issue=&rft.spage=197&rft.isbn=&rft.btitle=&rft.title=Special+Paper+-+Geological+Society+of+America&rft.issn=00721077&rft_id=info:doi/10.1130%2F2015.2514%2813%29 L2 - http://specialpapers.gsapubs.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 112 N1 - PubXState - CO N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Online First N1 - Last updated - 2015-12-17 N1 - CODEN - GSAPAZ N1 - SubjectsTermNotLitGenreText - continental crust; continental lithosphere; continental margin; continents; crust; density; dipole moment; extension; geodesy; geoid; gravity field; intraplate processes; lithosphere; lower mantle; mantle; mid-ocean ridges; ocean floors; passive margins; plate tectonics; stress fields; upper mantle DO - http://dx.doi.org/10.1130/2015.2514(13) ER - TY - JOUR T1 - Influence of injection mode on transport properties in kilometer-scale three-dimensional discrete fracture networks AN - 1797538405; 2016-053102 AB - We investigate how the choice of injection mode impacts transport properties in kilometer-scale three-dimensional discrete fracture networks (DFN). The choice of injection mode, resident and flux-weighted, is designed to mimic different physical phenomena. It has been hypothesized that solute plumes injected under resident conditions evolve to behave similarly to solutes injected under flux-weighted conditions. Previously, computational limitations have prohibited the large-scale simulations required to investigate this hypothesis. We investigate this hypothesis by using a high-performance DFN suite, dfnWorks, to simulate flow in kilometer-scale three-dimensional DFNs based on fractured granite at the Forsmark site in Sweden, and adopt a Lagrangian approach to simulate transport therein. Results show that after traveling through a pre-equilibrium region, both injection methods exhibit linear scaling of the first moment of travel time and power law scaling of the breakthrough curve with similar exponents, slightly larger than 2. The physical mechanisms behind this evolution appear to be the combination of in-network channeling of mass into larger fractures, which offer reduced resistance to flow, and in-fracture channeling, which results from the topology of the DFN. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Hyman, J D AU - Painter, S L AU - Viswanathan, H AU - Makedonska, N AU - Karra, S AU - Montanari, Alberto AU - Bahr, Jean AU - Bloeschl, Guenter AU - Cai, Ximing AU - Mackay, D Scott AU - Michalak, Anna M AU - Rajaram, Harihar AU - Sander, Graham Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 7289 EP - 7308 PB - American Geophysical Union, Washington, DC VL - 51 IS - 9 SN - 0043-1397, 0043-1397 KW - solute transport KW - networks KW - Western Europe KW - numerical models KW - three-dimensional models KW - waste disposal sites KW - mathematical models KW - Europe KW - equations KW - fracturing KW - discrete fracture networks KW - radioactive waste KW - Forsmark Sweden KW - fractures KW - Scandinavia KW - fluid injection KW - Uppsala Sweden KW - transport KW - waste disposal KW - underground disposal KW - Sweden KW - 30:Engineering geology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538405?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Influence+of+injection+mode+on+transport+properties+in+kilometer-scale+three-dimensional+discrete+fracture+networks&rft.au=Hyman%2C+J+D%3BPainter%2C+S+L%3BViswanathan%2C+H%3BMakedonska%2C+N%3BKarra%2C+S%3BMontanari%2C+Alberto%3BBahr%2C+Jean%3BBloeschl%2C+Guenter%3BCai%2C+Ximing%3BMackay%2C+D+Scott%3BMichalak%2C+Anna+M%3BRajaram%2C+Harihar%3BSander%2C+Graham&rft.aulast=Hyman&rft.aufirst=J&rft.date=2015-09-01&rft.volume=51&rft.issue=9&rft.spage=7289&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR017151 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 63 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-06-17 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - discrete fracture networks; equations; Europe; fluid injection; Forsmark Sweden; fractures; fracturing; mathematical models; networks; numerical models; radioactive waste; Scandinavia; solute transport; Sweden; three-dimensional models; transport; underground disposal; Uppsala Sweden; waste disposal; waste disposal sites; Western Europe DO - http://dx.doi.org/10.1002/2015WR017151 ER - TY - JOUR T1 - Parameter estimation and prediction for groundwater contamination based on measure theory AN - 1797538177; 2016-053118 AB - The problem of groundwater contamination in an aquifer is one with many uncertainties. Properly quantifying these uncertainties is essential in order to make reliable probabilistic-based predictions and decisions regarding remediation strategies. In this work, a measure-theoretic framework is employed to quantify uncertainties in a simplified groundwater contamination transport model. Given uncertain data from observation wells, the stochastic inverse problem is solved numerically to obtain a probability measure on the space of unknown model parameters characterizing groundwater flow and contaminant transport in an aquifer, as well as unknown model boundary or source terms such as the contaminant source release into the environment. This probability measure is used to make predictions of future contaminant concentrations and to analyze possible remediation techniques. The ability to identify regions of small but nonzero probability using this method is illustrated. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Mattis, S A AU - Butler, T D AU - Dawson, C N AU - Estep, D AU - Vesselinov, V V AU - Montanari, Alberto AU - Bahr, Jean AU - Bloeschl, Guenter AU - Cai, Ximing AU - Mackay, D Scott AU - Michalak, Anna M AU - Rajaram, Harihar AU - Sander, Graham Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 7608 EP - 7629 PB - American Geophysical Union, Washington, DC VL - 51 IS - 9 SN - 0043-1397, 0043-1397 KW - numerical models KW - pollutants KW - numerical analysis KW - statistical analysis KW - prediction KW - pollution KW - inverse problem KW - equations KW - remediation KW - ground water KW - aquifers KW - errors KW - transport KW - quantitative analysis KW - probability KW - water pollution KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538177?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Parameter+estimation+and+prediction+for+groundwater+contamination+based+on+measure+theory&rft.au=Mattis%2C+S+A%3BButler%2C+T+D%3BDawson%2C+C+N%3BEstep%2C+D%3BVesselinov%2C+V+V%3BMontanari%2C+Alberto%3BBahr%2C+Jean%3BBloeschl%2C+Guenter%3BCai%2C+Ximing%3BMackay%2C+D+Scott%3BMichalak%2C+Anna+M%3BRajaram%2C+Harihar%3BSander%2C+Graham&rft.aulast=Mattis&rft.aufirst=S&rft.date=2015-09-01&rft.volume=51&rft.issue=9&rft.spage=7608&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR017295 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 48 N1 - PubXState - DC N1 - Document feature - illus. incl. 12 tables N1 - Last updated - 2016-06-17 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - aquifers; equations; errors; ground water; inverse problem; numerical analysis; numerical models; pollutants; pollution; prediction; probability; quantitative analysis; remediation; statistical analysis; transport; water pollution DO - http://dx.doi.org/10.1002/2015WR017295 ER - TY - JOUR T1 - Hydraulic fracturing fluid migration in the subsurface; a review and expanded modeling results AN - 1797532715; 2016-053095 AB - Understanding the transport of hydraulic fracturing (HF) fluid that is injected into the deep subsurface for shale gas extraction is important to ensure that shallow drinking water aquifers are not contaminated. Topographically driven flow, overpressured shale reservoirs, permeable pathways such as faults or leaky wellbores, the increased formation pressure due to HF fluid injection, and the density contrast of the HF fluid to the surrounding brine can encourage upward HF fluid migration. In contrast, the very low shale permeability and capillary imbibition of water into partially saturated shale may sequester much of the HF fluid, and well production will remove HF fluid from the subsurface. We review the literature on important aspects of HF fluid migration. Single-phase flow and transport simulations are performed to quantify how much HF fluid is removed via the wellbore with flowback and produced water, how much reaches overlying aquifers, and how much is permanently sequestered by capillary imbibition, which is treated as a sink term based on a semianalytical, one-dimensional solution for two-phase flow. These simulations include all of the important aspects of HF fluid migration identified in the literature review and are performed in five stages to faithfully represent the typical operation of a hydraulically fractured well. No fracturing fluid reaches the aquifer without a permeable pathway. In the presence of a permeable pathway, 10 times more fracturing fluid reaches the aquifer if well production and capillary imbibition are not included in the model. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Birdsell, Daniel T AU - Rajaram, Harihar AU - Dempsey, David AU - Viswanathan, Hari S AU - Montanari, Alberto AU - Bahr, Jean AU - Bloeschl, Guenter AU - Cai, Ximing AU - Mackay, D Scott AU - Michalak, Anna M AU - Sander, Graham Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 7159 EP - 7188 PB - American Geophysical Union, Washington, DC VL - 51 IS - 9 SN - 0043-1397, 0043-1397 KW - overpressure KW - hydraulic fracturing KW - aquifer vulnerability KW - migration KW - numerical models KW - capillary pressure KW - shale KW - pollution KW - gas shale KW - fluid phase KW - ground water KW - aquifers KW - fluid injection KW - sedimentary rocks KW - boreholes KW - transport KW - shallow aquifers KW - massive hydraulic fracturing KW - water pollution KW - clastic rocks KW - permeability KW - 30:Engineering geology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797532715?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Hydraulic+fracturing+fluid+migration+in+the+subsurface%3B+a+review+and+expanded+modeling+results&rft.au=Birdsell%2C+Daniel+T%3BRajaram%2C+Harihar%3BDempsey%2C+David%3BViswanathan%2C+Hari+S%3BMontanari%2C+Alberto%3BBahr%2C+Jean%3BBloeschl%2C+Guenter%3BCai%2C+Ximing%3BMackay%2C+D+Scott%3BMichalak%2C+Anna+M%3BSander%2C+Graham&rft.aulast=Birdsell&rft.aufirst=Daniel&rft.date=2015-09-01&rft.volume=51&rft.issue=9&rft.spage=7159&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR017810 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 85 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-06-17 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - aquifer vulnerability; aquifers; boreholes; capillary pressure; clastic rocks; fluid injection; fluid phase; gas shale; ground water; hydraulic fracturing; massive hydraulic fracturing; migration; numerical models; overpressure; permeability; pollution; sedimentary rocks; shale; shallow aquifers; transport; water pollution DO - http://dx.doi.org/10.1002/2015WR017810 ER - TY - JOUR T1 - Bayesian-information-gap decision theory with an application to CO (sub 2) sequestration AN - 1797529460; 2016-053091 AB - Decisions related to subsurface engineering problems such as groundwater management, fossil fuel production, and geologic carbon sequestration are frequently challenging because of an overabundance of uncertainties (related to conceptualizations, parameters, observations, etc.). Because of the importance of these problems to agriculture, energy, and the climate (respectively), good decisions that are scientifically defensible must be made despite the uncertainties. We describe a general approach to making decisions for challenging problems such as these in the presence of severe uncertainties that combines probabilistic and nonprobabilistic methods. The approach uses Bayesian sampling to assess parametric uncertainty and Information-Gap Decision Theory (IGDT) to address model inadequacy. The combined approach also resolves an issue that frequently arises when applying Bayesian methods to real-world engineering problems related to the enumeration of possible outcomes. In the case of zero nonprobabilistic uncertainty, the method reduces to a Bayesian method. To illustrate the approach, we apply it to a site-selection decision for geologic CO (sub 2) sequestration. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - O'Malley, D AU - Vesselinov, V V AU - Montanari, Alberto AU - Bahr, Jean AU - Bloeschl, Guenter AU - Cai, Ximing AU - Mackay, D Scott AU - Michalak, Anna M AU - Rajaram, Harihar AU - Sander, Graham Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 7080 EP - 7089 PB - American Geophysical Union, Washington, DC VL - 51 IS - 9 SN - 0043-1397, 0043-1397 KW - carbon sequestration KW - numerical models KW - Bayesian analysis KW - statistical analysis KW - water management KW - decision-making KW - ground water KW - carbon dioxide KW - aquifers KW - gas injection KW - boreholes KW - quantitative analysis KW - probability KW - uncertainty KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797529460?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Bayesian-information-gap+decision+theory+with+an+application+to+CO+%28sub+2%29+sequestration&rft.au=O%27Malley%2C+D%3BVesselinov%2C+V+V%3BMontanari%2C+Alberto%3BBahr%2C+Jean%3BBloeschl%2C+Guenter%3BCai%2C+Ximing%3BMackay%2C+D+Scott%3BMichalak%2C+Anna+M%3BRajaram%2C+Harihar%3BSander%2C+Graham&rft.aulast=O%27Malley&rft.aufirst=D&rft.date=2015-09-01&rft.volume=51&rft.issue=9&rft.spage=7080&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR017413 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 37 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-06-17 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - aquifers; Bayesian analysis; boreholes; carbon dioxide; carbon sequestration; decision-making; gas injection; ground water; numerical models; probability; quantitative analysis; statistical analysis; uncertainty; water management DO - http://dx.doi.org/10.1002/2015WR017413 ER - TY - JOUR T1 - Dynamics of river mouth deposits AN - 1789748715; 2016-042217 AB - Bars and subaqueous levees often form at river mouths due to high sediment availability. Once these deposits emerge and develop into islands, they become important elements of the coastal landscape, hosting rich ecosystems. Sea level rise and sediment starvation are jeopardizing these landforms, motivating a thorough analysis of the mechanisms responsible for their formation and evolution. Here we present recent studies on the dynamics of mouth bars and subaqueous levees. The review encompasses both hydrodynamic and morphological results. We first analyze the hydrodynamics of the water jet exiting a river mouth. We then show how this dynamics coupled to sediment transport leads to the formation of mouth bars and levees. Specifically, we discuss the role of sediment eddy diffusivity and potential vorticity on sediment redistribution and related deposits. The effect of waves, tides, sediment characteristics, and vegetation on river mouth deposits is included in our analysis, thus accounting for the inherent complexity of the coastal environment where these landforms are common. Based on the results presented herein, we discuss in detail how river mouth deposits can be used to build new land or restore deltaic shorelines threatened by erosion. Abstract Copyright (2015), American Geophysical Union. All Rights Reserved. JF - Reviews of Geophysics AU - Fagherazzi, Sergio AU - Edmonds, Douglas A AU - Nardin, William AU - Leonardi, Nicoletta AU - Canestrelli, Alberto AU - Falcini, Federico AU - Jerolmack, Douglas J AU - Mariotti, Giulio AU - Rowland, Joel C AU - Slingerland, Rudy L Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 642 EP - 672 PB - American Geophysical Union, Washington, DC VL - 53 IS - 3 SN - 8755-1209, 8755-1209 KW - numerical models KW - sediment transport KW - erosion KW - deltaic sedimentation KW - sedimentation KW - bars KW - simulation KW - fluvial sedimentation KW - Gulf of Mexico KW - estuarine sedimentation KW - transport KW - dynamics KW - sediments KW - hydrodynamics KW - North Atlantic KW - Atlantic Ocean KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789748715?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reviews+of+Geophysics&rft.atitle=Dynamics+of+river+mouth+deposits&rft.au=Fagherazzi%2C+Sergio%3BEdmonds%2C+Douglas+A%3BNardin%2C+William%3BLeonardi%2C+Nicoletta%3BCanestrelli%2C+Alberto%3BFalcini%2C+Federico%3BJerolmack%2C+Douglas+J%3BMariotti%2C+Giulio%3BRowland%2C+Joel+C%3BSlingerland%2C+Rudy+L&rft.aulast=Fagherazzi&rft.aufirst=Sergio&rft.date=2015-09-01&rft.volume=53&rft.issue=3&rft.spage=642&rft.isbn=&rft.btitle=&rft.title=Reviews+of+Geophysics&rft.issn=87551209&rft_id=info:doi/10.1002%2F2014RG000451 L2 - http://agupubs.onlinelibrary.wiley.com/agu/journal/10.1002/(ISSN)1944-9208/issues/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 144 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2016-05-19 N1 - SubjectsTermNotLitGenreText - Atlantic Ocean; bars; deltaic sedimentation; dynamics; erosion; estuarine sedimentation; fluvial sedimentation; Gulf of Mexico; hydrodynamics; North Atlantic; numerical models; sediment transport; sedimentation; sediments; simulation; transport DO - http://dx.doi.org/10.1002/2014RG000451 ER - TY - JOUR T1 - Thermophysical properties of U sub(3)Si sub(2) to 1773 K AN - 1765965781; PQ0002503672 AB - Use of U sub(3)Si sub(2) in nuclear reactors requires accurate thermophysical property data to capture heat transfer within the core. Compilation of the limited previous research efforts focused on the most critical property, thermal conductivity, reveals extensive disagreement Assessment of this data is challenged by the fact that the critical structural and chemical details of the material used to provide historic data is either absent or confirms the presence of significant impurity phases. This study was initiated to fabricate high purity U sub(3)Si sub(2) to quantify the coefficient of thermal expansion, heat capacity, thermal diffusivity, and thermal conductivity from room temperature to 1773 K. Datasets provided in this manuscript will facilitate more detailed fuel performance modeling to assess both current and proposed reactor designs that incorporate U sub(3)Si sub(2). JF - Journal of Nuclear Materials AU - White, J T AU - Nelson, A T AU - Dunwoody, J T AU - Byler, D D AU - Safarik, D J AU - McClellan, K J AD - Los Alamos National Laboratory, Los Alamos, NM, United States, jtwhite@lanl.gov Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 275 EP - 280 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 464 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Historical account KW - Nuclear reactors KW - Thermal expansion KW - Thermal conductivity KW - Fuels KW - Radioactive materials KW - Thermal diffusivity KW - Temperature KW - Heat transfer KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765965781?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Thermophysical+properties+of+U+sub%283%29Si+sub%282%29+to+1773+K&rft.au=White%2C+J+T%3BNelson%2C+A+T%3BDunwoody%2C+J+T%3BByler%2C+D+D%3BSafarik%2C+D+J%3BMcClellan%2C+K+J&rft.aulast=White&rft.aufirst=J&rft.date=2015-09-01&rft.volume=464&rft.issue=&rft.spage=275&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2015.04.031 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Number of references - 26 N1 - Last updated - 2016-02-29 N1 - SubjectsTermNotLitGenreText - Historical account; Thermal expansion; Nuclear reactors; Thermal conductivity; Fuels; Thermal diffusivity; Radioactive materials; Temperature; Heat transfer DO - http://dx.doi.org/10.1016/j.jnucmat.2015.04.031 ER - TY - JOUR T1 - Fracture transmissivity evolution due to silica dissolution/precipitation during geothermal heat extraction AN - 1761073368; 2016-009026 AB - We present thermo-hydro-chemical simulations of silicic geothermal reservoirs over approximately 20 year durations. For injection of undersaturated or oversaturated water with respect to the solubility of amorphous silica, the highest rates of reactive alteration occur at some distance away from the injection well. This is largely because the temperature dependence of the reaction rate plays a much greater role than temperature dependent solubility. For oversaturated injection, precipitation occurs in a band, confining the flow system to smaller areas. For undersaturated injection, dissolution causes permeability growth far from the injection well, resulting in longer flowpaths that prevent short-circuits, which implies favorable conditions for sustained energy production. Initial permeability heterogeneity influences reservoir response significantly only when the correlation lengths are of the order of 1/10th of the fracture size or more. Abstract Copyright (2015) Elsevier, B.V. JF - Geothermics AU - Pandey, S N AU - Chaudhuri, A AU - Rajaram, H AU - Kelkar, S Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 111 EP - 126 PB - Elsevier, Oxford-New York VL - 57 SN - 0375-6505, 0375-6505 KW - geothermal engineering KW - enhanced recovery KW - correlation KW - hydrochemistry KW - porosity KW - temperature KW - geothermal energy KW - fluid injection KW - heterogeneous materials KW - naturally fractured reservoirs KW - reservoir properties KW - thermochemical properties KW - permeability KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1761073368?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Fracture+transmissivity+evolution+due+to+silica+dissolution%2Fprecipitation+during+geothermal+heat+extraction&rft.au=Pandey%2C+S+N%3BChaudhuri%2C+A%3BRajaram%2C+H%3BKelkar%2C+S&rft.aulast=Pandey&rft.aufirst=S&rft.date=2015-09-01&rft.volume=57&rft.issue=&rft.spage=111&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.06.011 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2016-01-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - correlation; enhanced recovery; fluid injection; geothermal energy; geothermal engineering; heterogeneous materials; hydrochemistry; naturally fractured reservoirs; permeability; porosity; reservoir properties; temperature; thermochemical properties DO - http://dx.doi.org/10.1016/j.geothermics.2015.06.011 ER - TY - JOUR T1 - Numerical modeling of injection, stress and permeability enhancement during shear stimulation at the Desert Peak enhanced geothermal system AN - 1734269833; 2015-112731 AB - Creation of an Enhanced Geothermal System relies on stimulation of fracture permeability through self-propping shear failure that creates a complex fracture network with high surface area for efficient heat transfer. In 2010, shear stimulation was carried out in well 27-15 at Desert Peak geothermal field, Nevada, by injecting cold water at pressure less than the minimum principal stress. An order-of-magnitude improvement in well injectivity was recorded. Here, we describe a numerical model that accounts for injection-induced stress changes and permeability enhancement during this stimulation. We use the coupled thermo-hydrological-mechanical simulator FEHM to (i) construct a wellbore model for non-steady bottom-hole temperature and pressure conditions during the injection, and (ii) apply these pressures and temperatures as a source term in a numerical model of the stimulation. A Mohr-Coulomb failure criterion and empirical fracture permeability is developed to describe permeability evolution of the fractured rock. The numerical model is calibrated using laboratory measurements of material properties on representative core samples and wellhead records of injection pressure and mass flow during the shear stimulation. The model captures both the absence of stimulation at low wellhead pressure (WHP < or =1.7 and < or =2.4 MPa) as well as the timing and magnitude of injectivity rise at medium WHP (3.1 MPa). Results indicate that thermoelastic effects near the wellbore and the associated non-local stresses further from the well combine to propagate a failure front away from the injection well. Elevated WHP promotes failure, increases the injection rate, and cools the wellbore; however, as the overpressure drops off with distance, thermal and non-local stresses play an ongoing role in promoting shear failure at increasing distance from the well. Abstract Copyright (2015) Elsevier, B.V. JF - International Journal of Rock Mechanics and Mining Sciences (1997) AU - Dempsey, David AU - Kelkar, Sharad AU - Davatzes, Nicholas AU - Hickman, Stephen AU - Moos, Daniel Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 190 EP - 206 PB - Elsevier, Oxford-New York VL - 78 SN - 1365-1609, 1365-1609 KW - United States KW - TOUGH2 KW - well stimulation KW - shear stress KW - elastic properties KW - rock mechanics KW - reservoir rocks KW - fluid injection KW - metamorphic rocks KW - metasedimentary rocks KW - Nevada KW - numerical models KW - thermoelastic properties KW - thermal properties KW - stress KW - mechanical properties KW - geothermal engineering KW - enhanced recovery KW - geothermal energy KW - computer programs KW - geothermal fields KW - fluid pressure KW - dilatancy KW - naturally fractured reservoirs KW - Desert Peak Field KW - microearthquakes KW - earthquakes KW - permeability KW - 30:Engineering geology KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734269833?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.atitle=Numerical+modeling+of+injection%2C+stress+and+permeability+enhancement+during+shear+stimulation+at+the+Desert+Peak+enhanced+geothermal+system&rft.au=Dempsey%2C+David%3BKelkar%2C+Sharad%3BDavatzes%2C+Nicholas%3BHickman%2C+Stephen%3BMoos%2C+Daniel&rft.aulast=Dempsey&rft.aufirst=David&rft.date=2015-09-01&rft.volume=78&rft.issue=&rft.spage=190&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.issn=13651609&rft_id=info:doi/10.1016%2Fj.ijrmms.2015.06.003 L2 - http://www.sciencedirect.com/science/journal/13651609 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 50 N1 - Document feature - illus. N1 - Last updated - 2015-11-19 N1 - CODEN - IJRMA2 N1 - SubjectsTermNotLitGenreText - computer programs; Desert Peak Field; dilatancy; earthquakes; elastic properties; enhanced recovery; fluid injection; fluid pressure; geothermal energy; geothermal engineering; geothermal fields; mechanical properties; metamorphic rocks; metasedimentary rocks; microearthquakes; naturally fractured reservoirs; Nevada; numerical models; permeability; reservoir rocks; rock mechanics; shear stress; stress; thermal properties; thermoelastic properties; TOUGH2; United States; well stimulation DO - http://dx.doi.org/10.1016/j.ijrmms.2015.06.003 ER - TY - JOUR T1 - Directly imaging steeply-dipping fault zones in geothermal fields with multicomponent seismic data AN - 1732813231; PQ0002116948 AB - For characterizing geothermal systems, it is important to have clear images of steeply-dipping fault zones because they may confine the boundaries of geothermal reservoirs and influence hydrothermal flow. Elastic reverse-time migration (ERTM) is the most promising tool for subsurface imaging with multicomponent seismic data. However, conventional ERTM usually generates significant artifacts caused by the cross correlation of undesired wavefields and the polarity reversal of shear waves. In addition, it is difficult for conventional ERTM to directly image steeply-dipping fault zones. We develop a new ERTM imaging method in this paper to reduce these artifacts and directly image steeply-dipping fault zones. In our new ERTM method, forward-propagated source wavefields and backward-propagated receiver wavefields are decomposed into compressional (P) and shear (S) components. Each component of these wavefields is separated into left- and right-going, or downgoing and upgoing waves. The cross correlation imaging condition is applied to the separated wavefields along opposite propagation directions. For converted waves (P-to-S or S-to-P), the polarity correction is applied to the separated wavefields based on the analysis of Poynting vectors. Numerical imaging examples of synthetic seismic data demonstrate that our new ERTM method produces high-resolution images of steeply-dipping fault zones. JF - Geothermics AU - Chen, Ting AU - Huang, Lianjie AD - Geophysics Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, tchen@lanl.gov Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 238 EP - 245 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 57 SN - 0375-6505, 0375-6505 KW - Environment Abstracts KW - Steeply-dipping fault KW - Seismic imaging KW - Elastic reverse-time migration KW - Wavefield separation KW - Geothermal exploration KW - Poynting vector KW - Artifacts KW - Migration KW - Reservoirs KW - ENA 06:Food & Drugs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732813231?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Directly+imaging+steeply-dipping+fault+zones+in+geothermal+fields+with+multicomponent+seismic+data&rft.au=Chen%2C+Ting%3BHuang%2C+Lianjie&rft.aulast=Chen&rft.aufirst=Ting&rft.date=2015-09-01&rft.volume=57&rft.issue=&rft.spage=238&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.07.003 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Artifacts; Reservoirs; Migration DO - http://dx.doi.org/10.1016/j.geothermics.2015.07.003 ER - TY - JOUR T1 - Investigation of structural heterogeneity at the SPE site using combined P-wave travel times and Rg phase velocities AN - 1718054758; 2015-094172 AB - We present analyses of the 2D seismic structure beneath Source Physics Experiments (SPE) geophone lines that extended radially at 100 m spacing from 100 to 2000 m from the source borehole. With seismic sources at only one end of the geophone lines, standard refraction profiling methods cannot resolve seismic velocity structures unambiguously. In previous work, we demonstrated overall agreement between body-wave refraction modeling and Rg dispersion curves for the least complex of the five lines. A more detailed inspection supports a 2D reinterpretation of the structure. We obtained Rg phase velocity measurements in both the time and frequency domains, then used iterative adjustment of the initial 1D body-wave model to predict Rg dispersion curves to fit the observed values. Our method applied to the most topographically severe of the geophone lines is supplemented with a 2D ray-tracing approach, whose application to P-wave arrivals supports the Rg analysis. In addition, midline sources will allow us to refine our characterization in future work. JF - Bulletin of the Seismological Society of America AU - Rowe, Charlotte A AU - Patton, Howard J Y1 - 2015/09/01/ PY - 2015 DA - 2015 Sep 01 SP - 2379 EP - 2389 PB - Seismological Society of America, Berkeley, CA VL - 105 IS - 5 SN - 0037-1106, 0037-1106 KW - United States KW - P-waves KW - geophones KW - technology KW - Nevada Nuclear Security Site KW - chemical explosions KW - data processing KW - elastic waves KW - short-period waves KW - surface waves KW - seismicity KW - Rg-waves KW - algorithms KW - heterogeneity KW - Nevada KW - body waves KW - guided waves KW - explosions KW - Source Physics Experiments KW - Rayleigh waves KW - two-dimensional models KW - computer programs KW - boreholes KW - velocity structure KW - seismic waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054758?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Investigation+of+structural+heterogeneity+at+the+SPE+site+using+combined+P-wave+travel+times+and+Rg+phase+velocities&rft.au=Rowe%2C+Charlotte+A%3BPatton%2C+Howard+J&rft.aulast=Rowe&rft.aufirst=Charlotte&rft.date=2015-09-01&rft.volume=105&rft.issue=5&rft.spage=2379&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150022 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 22 N1 - PubXState - CA N1 - Document feature - illus. incl. 4 tables, geol. sketch map N1 - Last updated - 2015-12-17 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; body waves; boreholes; chemical explosions; computer programs; data processing; elastic waves; explosions; geophones; guided waves; heterogeneity; Nevada; Nevada Nuclear Security Site; P-waves; Rayleigh waves; Rg-waves; seismic waves; seismicity; short-period waves; Source Physics Experiments; surface waves; technology; two-dimensional models; United States; velocity structure DO - http://dx.doi.org/10.1785/0120150022 ER - TY - CPAPER T1 - The role of hydraulic failure and avoidance thereof in drought-induced mortality T2 - 100th Annual Meeting of the Ecological Society of America (ESA 2015) AN - 1731769007; 6363314 JF - 100th Annual Meeting of the Ecological Society of America (ESA 2015) AU - McDowell, Nate Y1 - 2015/08/09/ PY - 2015 DA - 2015 Aug 09 KW - Hydraulics KW - Mortality KW - Avoidance reactions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1731769007?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=100th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2015%29&rft.atitle=The+role+of+hydraulic+failure+and+avoidance+thereof+in+drought-induced+mortality&rft.au=McDowell%2C+Nate&rft.aulast=McDowell&rft.aufirst=Nate&rft.date=2015-08-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=100th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2015%29&rft.issn=&rft_id=info:doi/ L2 - http://eco.confex.com/eco/2015/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-06 N1 - Last updated - 2015-11-09 ER - TY - CPAPER T1 - Linking tropical forest function to hydraulic traits in a size-structured and trait-based model T2 - 100th Annual Meeting of the Ecological Society of America (ESA 2015) AN - 1731767395; 6361940 JF - 100th Annual Meeting of the Ecological Society of America (ESA 2015) AU - Christoffersen, Bradley Y1 - 2015/08/09/ PY - 2015 DA - 2015 Aug 09 KW - Hydraulics KW - Tropical forests KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1731767395?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=100th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2015%29&rft.atitle=Linking+tropical+forest+function+to+hydraulic+traits+in+a+size-structured+and+trait-based+model&rft.au=Christoffersen%2C+Bradley&rft.aulast=Christoffersen&rft.aufirst=Bradley&rft.date=2015-08-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=100th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2015%29&rft.issn=&rft_id=info:doi/ L2 - http://eco.confex.com/eco/2015/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-06 N1 - Last updated - 2015-11-09 ER - TY - JOUR T1 - Statistical scaling of geometric characteristics in stochastically generated pore microstructures AN - 1824215150; 2016-084490 AB - We analyze the statistical scaling of structural attributes of virtual porous microstructures that are stochastically generated by thresholding Gaussian random fields. Characterization of the extent at which randomly generated pore spaces can be considered as representative of a particular rock sample depends on the metrics employed to compare the virtual sample against its physical counterpart. Typically, comparisons against features and/patterns of geometric observables, e.g., porosity and specific surface area, flow-related macroscopic parameters, e.g., permeability, or autocorrelation functions are used to assess the representativeness of a virtual sample, and thereby the quality of the generation method. Here, we rely on manifestations of statistical scaling of geometric observables which were recently observed in real millimeter scale rock samples as additional relevant metrics by which to characterize a virtual sample. We explore the statistical scaling of two geometric observables, namely porosity (Phi ) and specific surface area (SSA), of porous microstructures generated using the method of Smolarkiewicz and Winter and Hyman and Winter. Our results suggest that the method can produce virtual pore space samples displaying the symptoms of statistical scaling observed in real rock samples. Order q sample structure functions (statistical moments of absolute increments) of Phi and SSA scale as a power of the separation distance (lag) over a range of lags, and extended self-similarity (linear relationship between log structure functions of successive orders) appears to be an intrinsic property of the generated media. The width of the range of lags where power-law scaling is observed and the Hurst coefficient associated with the variables we consider can be controlled by the generation parameters of the method. Copyright 2015 Springer International Publishing Switzerland JF - Computational Geosciences AU - Hyman, Jeffrey D AU - Guadagnini, Alberto AU - Winter, C Larrabee Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 845 EP - 854 PB - Springer, Dordrecht VL - 19 IS - 4 SN - 1420-0597, 1420-0597 KW - statistical analysis KW - microstructure KW - characterization KW - porous materials KW - mathematical models KW - porosity KW - scaling KW - geometry KW - models KW - stochastic processes KW - autocorrelation KW - Gaussian random fields KW - applications KW - permeability KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215150?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computational+Geosciences&rft.atitle=Statistical+scaling+of+geometric+characteristics+in+stochastically+generated+pore+microstructures&rft.au=Hyman%2C+Jeffrey+D%3BGuadagnini%2C+Alberto%3BWinter%2C+C+Larrabee&rft.aulast=Hyman&rft.aufirst=Jeffrey&rft.date=2015-08-01&rft.volume=19&rft.issue=4&rft.spage=845&rft.isbn=&rft.btitle=&rft.title=Computational+Geosciences&rft.issn=14200597&rft_id=info:doi/10.1007%2Fs10596-015-9493-8 L2 - http://www.springerlink.com/content/101744/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 46 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - applications; autocorrelation; characterization; Gaussian random fields; geometry; mathematical models; microstructure; models; permeability; porosity; porous materials; scaling; statistical analysis; stochastic processes DO - http://dx.doi.org/10.1007/s10596-015-9493-8 ER - TY - JOUR T1 - Interdependence of chronic hydraulic dysfunction and canopy processes can improve integrated models of tree response to drought AN - 1780802572; 2016-032131 AB - Hydraulic systems of plants have evolved in the context of carbon allocation and fitness trade-offs of maximizing carbon gain and water transport in the face of short and long-term fluctuations in environmental conditions. The resulting diversity of traits include a continuum of isohydry-anisohydry or high to low relative stomatal closure during drought, shedding of canopy foliage or disconnecting roots from soil to survive drought, and adjusting root areas to efficiently manage canopy water costs associated with photosynthesis. These traits are examined within TREES, an integrated model that explicitly couples photosynthesis and carbon allocation to soil-plant hydraulics and canopy processes. Key advances of the model are its ability to account for differences in soil and xylem cavitation, transience of hydraulic impairment associated with delayed or no refilling of xylem, and carbon allocation to plant structures based on photosynthetic uptake of carbon and hydraulic limitations to water transport. The model was used to examine hydraulic traits of co-occurring isohydric (pinon pine) and anisohydric (one-seed juniper) trees from a field-based experimental drought. Model predictions of both transpiration and leaf water potential were improved when there was no refilling of xylem over simulations where xylem was able refill in response to soil water recharge. Model experiments with alternative root-to-leaf area ratios (R (sub R/L) ) showed the R (sub R/L) that supports maximum cumulative water use is not beneficial for supporting maximum carbon gain during extended drought, illustrating how a process model reveals trade-offs in plant traits. Abstract Copyright (2015), American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Mackay, D Scott AU - Roberts, David E AU - Ewers, Brent E AU - Sperry, John S AU - McDowell, Nathan G AU - Pockman, William T Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 6156 EP - 6176 PB - American Geophysical Union, Washington, DC VL - 51 IS - 8 SN - 0043-1397, 0043-1397 KW - soils KW - hydrology KW - Plantae KW - roots KW - numerical analysis KW - unsaturated zone KW - equations KW - leaves KW - drought KW - stomata KW - carbon KW - trees KW - soil-water balance KW - hydraulic conductivity KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780802572?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Interdependence+of+chronic+hydraulic+dysfunction+and+canopy+processes+can+improve+integrated+models+of+tree+response+to+drought&rft.au=Mackay%2C+D+Scott%3BRoberts%2C+David+E%3BEwers%2C+Brent+E%3BSperry%2C+John+S%3BMcDowell%2C+Nathan+G%3BPockman%2C+William+T&rft.aulast=Mackay&rft.aufirst=D&rft.date=2015-08-01&rft.volume=51&rft.issue=8&rft.spage=6156&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR017244 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 101 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-04-14 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - carbon; drought; equations; hydraulic conductivity; hydrology; leaves; numerical analysis; Plantae; roots; soil-water balance; soils; stomata; trees; unsaturated zone DO - http://dx.doi.org/10.1002/2015WR017244 ER - TY - JOUR T1 - Spatial-temporal variation of low-frequency earthquake bursts near Parkfield, California AN - 1769967460; 2016-018977 AB - Tectonic tremor (TT) and low-frequency earthquakes (LFEs) have been found in the deeper crust of various tectonic environments globally in the last decade. The spatial-temporal behaviour of LFEs provides insight into deep fault zone processes. In this study, we examine recurrence times from a 12-yr catalogue of 88 LFE families with approximately 730 000 LFEs in the vicinity of the Parkfield section of the San Andreas Fault (SAF) in central California. We apply an automatic burst detection algorithm to the LFE recurrence times to identify the clustering behaviour of LFEs (LFE bursts) in each family. We find that the burst behaviours in the northern and southern LFE groups differ. Generally, the northern group has longer burst duration but fewer LFEs per burst, while the southern group has shorter burst duration but more LFEs per burst. The southern group LFE bursts are generally more correlated than the northern group, suggesting more coherent deep fault slip and relatively simpler deep fault structure beneath the locked section of SAF. We also found that the 2004 Parkfield earthquake clearly increased the number of LFEs per burst and average burst duration for both the northern and the southern groups, with a relatively larger effect on the northern group. This could be due to the weakness of northern part of the fault, or the northwesterly rupture direction of the Parkfield earthquake. JF - Geophysical Journal International AU - Wu, Chunquan AU - Guyer, Robert AU - Shelly, David AU - Trugman, Daniel AU - Frank, William AU - Gomberg, Joan AU - Johnson, Paul Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 914 EP - 919 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 202 IS - 2 SN - 0956-540X, 0956-540X KW - United States KW - P-waves KW - elastic waves KW - strike-slip faults KW - California KW - transform faults KW - spatial variations KW - seismicity KW - Monterey County California KW - Parkfield California KW - tectonics KW - seismotectonics KW - faults KW - orientation KW - body waves KW - continental margin KW - magnitude KW - signals KW - rupture KW - Parkfield earthquake 2004 KW - temporal distribution KW - seismic waves KW - earthquakes KW - S-waves KW - 19:Seismology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769967460?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Spatial-temporal+variation+of+low-frequency+earthquake+bursts+near+Parkfield%2C+California&rft.au=Wu%2C+Chunquan%3BGuyer%2C+Robert%3BShelly%2C+David%3BTrugman%2C+Daniel%3BFrank%2C+William%3BGomberg%2C+Joan%3BJohnson%2C+Paul&rft.aulast=Wu&rft.aufirst=Chunquan&rft.date=2015-08-01&rft.volume=202&rft.issue=2&rft.spage=914&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggv194 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 27 N1 - Document feature - illus. incl. geol. sketch map N1 - Last updated - 2016-03-03 N1 - SubjectsTermNotLitGenreText - body waves; California; continental margin; earthquakes; elastic waves; faults; magnitude; Monterey County California; orientation; P-waves; Parkfield California; Parkfield earthquake 2004; rupture; S-waves; seismic waves; seismicity; seismotectonics; signals; spatial variations; strike-slip faults; tectonics; temporal distribution; transform faults; United States DO - http://dx.doi.org/10.1093/gji/ggv194 ER - TY - JOUR T1 - Statistical tests on clustered global earthquake synthetic data sets AN - 1765875032; 2016-016111 AB - We study the ability of statistical tests to identify nonrandom features of earthquake catalogs, with a focus on the global earthquake record since 1900. We construct four types of synthetic data sets containing varying strengths of clustering, with each data set containing on average 10,000 events over 100 years with magnitudes above M = 6. We apply a suite of statistical tests to each synthetic realization in order to evaluate the ability of each test to identify the sequences of events as nonrandom. Our results show that detection ability is dependent on the quantity of data, the nature of the type of clustering, and the specific signal used in the statistical test. Data sets that exhibit a stronger variation in the seismicity rate are generally easier to identify as nonrandom for a given background rate. We also show that we can address this problem in a Bayesian framework, with the clustered data sets as prior distributions. Using this new Bayesian approach, we can place quantitative bounds on the range of possible clustering strengths that are consistent with the global earthquake data. At M = 7, we can estimate 99th percentile confidence bounds on the number of triggered events, with an upper bound of 20% of the catalog for global aftershock sequences, with a stronger upper bound on the fraction of triggered events of 10% for long-term event clusters. At M = 8, the bounds are less strict due to the reduced number of events. However, our analysis shows that other types of clustering could be present in the data that we are unable to detect. Our results aid in the interpretation of the results of statistical tests on earthquake catalogs, both worldwide and regionally. Abstract Copyright (2015), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Daub, Eric G AU - Trugman, Daniel T AU - Johnson, Paul A Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 5693 EP - 5716 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 8 SN - 2169-9313, 2169-9313 KW - seismicity KW - Bayesian analysis KW - global KW - statistical analysis KW - magnitude KW - earthquakes KW - cluster analysis KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765875032?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Statistical+tests+on+clustered+global+earthquake+synthetic+data+sets&rft.au=Daub%2C+Eric+G%3BTrugman%2C+Daniel+T%3BJohnson%2C+Paul+A&rft.aulast=Daub&rft.aufirst=Eric&rft.date=2015-08-01&rft.volume=120&rft.issue=8&rft.spage=5693&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2014JB011777 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-02-18 N1 - SubjectsTermNotLitGenreText - Bayesian analysis; cluster analysis; earthquakes; global; magnitude; seismicity; statistical analysis DO - http://dx.doi.org/10.1002/2014JB011777 ER - TY - JOUR T1 - Specular interferometric imaging of vertical seismic profile data AN - 1756505697; 2016-006918 AB - We introduce the concept of seminatural migration of multiples in vertical seismic profile (VSP) data, denoted as specular interferometric migration, in which part of the kernel is computed by ray tracing and the other part is obtained from the data. It has the advantage over standard migration of ghost reflections, in that the well statics are eliminated and the migration image is no more sensitive to velocity errors than migration of VSP primaries. Moreover, the VSP ghost image has significantly more subsurface illumination than the VSP primary image. The synthetic and field data results validate the effectiveness of this method. JF - Interpretation (Tulsa) AU - Huang, Yunsong AU - He, Ruiqing AU - Boonyasiriwat, Chaiwoot AU - Luo, Yi AU - Schuster, Gerard T AU - Shemeta, Julie AU - Paulsson, Bjorn AU - Xiao, Xiang AU - Hornby, Brian AU - Karrenbach, Martin AU - Fehler, Mike AU - Hardage, Bob A AU - Huang, Lianjie AU - Yu, Grace AU - Yu, Jianhua Y1 - 2015/08// PY - 2015 DA - August 2015 SP - SW57 EP - SW62 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 3 IS - 3 SN - 2324-8858, 2324-8858 KW - seismic profiles KW - geophysical surveys KW - geophysical methods KW - interferometry KW - Gulf of Mexico KW - seismic methods KW - vertical seismic profiles KW - errors KW - velocity KW - surveys KW - geophysical profiles KW - algorithms KW - North Atlantic KW - Atlantic Ocean KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756505697?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Interpretation+%28Tulsa%29&rft.atitle=Specular+interferometric+imaging+of+vertical+seismic+profile+data&rft.au=Huang%2C+Yunsong%3BHe%2C+Ruiqing%3BBoonyasiriwat%2C+Chaiwoot%3BLuo%2C+Yi%3BSchuster%2C+Gerard+T%3BShemeta%2C+Julie%3BPaulsson%2C+Bjorn%3BXiao%2C+Xiang%3BHornby%2C+Brian%3BKarrenbach%2C+Martin%3BFehler%2C+Mike%3BHardage%2C+Bob+A%3BHuang%2C+Lianjie%3BYu%2C+Grace%3BYu%2C+Jianhua&rft.aulast=Huang&rft.aufirst=Yunsong&rft.date=2015-08-01&rft.volume=3&rft.issue=3&rft.spage=SW57&rft.isbn=&rft.btitle=&rft.title=Interpretation+%28Tulsa%29&rft.issn=23248858&rft_id=info:doi/10.1190%2FINT-2014-0251.1 L2 - http://library.seg.org/journal/inteio LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 14 N1 - PubXState - OK N1 - Document feature - illus. incl. sects. N1 - SuppNotes - Online First N1 - Last updated - 2016-01-14 N1 - SubjectsTermNotLitGenreText - algorithms; Atlantic Ocean; errors; geophysical methods; geophysical profiles; geophysical surveys; Gulf of Mexico; interferometry; North Atlantic; seismic methods; seismic profiles; surveys; velocity; vertical seismic profiles DO - http://dx.doi.org/10.1190/INT-2014-0251.1 ER - TY - JOUR T1 - Vertical seismic profile Kirchhoff migration with structure dip constraint AN - 1756505184; 2016-006917 AB - Prestack Kirchhoff depth migration is commonly used in borehole seismic imaging, where there is uneven illumination due to the limitations of the source-receiver geometry. A new vertical seismic profile (VSP) migration/imaging workflow has been established that incorporates the structure-dip information derived from a newly developed structure tensor analysis into the existing VSP Kirchhoff migration/imaging technique. This allows us to better image the structures in the vicinity of a borehole and the far-field dipping events away from the borehole. We tested the workflow with the HESS salt model. The results were compared with those from reverse time migration, which found that Kirchhoff migration combined with structure-dip information not only reduced ambiguities of the imaging result but also allowed for imaging dip structures (e.g., fault) in the far region from the borehole. This allows for imaging dip structures and provides a useful extension of existing VSP imaging capabilities using Kirchhoff migration. JF - Interpretation (Tulsa) AU - Zhao, Xiaomin AU - Jin, Shengwen AU - Schuster, Gerard T AU - Shemeta, Julie AU - Paulsson, Bjorn AU - Xiao, Xiang AU - Hornby, Brian AU - Karrenbach, Martin AU - Fehler, Mike AU - Hardage, Bob A AU - Huang, Lianjie AU - Yu, Grace AU - Yu, Jianhua Y1 - 2015/08// PY - 2015 DA - August 2015 SP - SW51 EP - SW56 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 3 IS - 3 SN - 2324-8858, 2324-8858 KW - seismic profiles KW - geophysical surveys KW - geophysical methods KW - seismic migration KW - Kirchhoff integral KW - seismic methods KW - geometry KW - vertical seismic profiles KW - dip KW - boreholes KW - surveys KW - geophysical profiles KW - prestack migration KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756505184?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Interpretation+%28Tulsa%29&rft.atitle=Vertical+seismic+profile+Kirchhoff+migration+with+structure+dip+constraint&rft.au=Zhao%2C+Xiaomin%3BJin%2C+Shengwen%3BSchuster%2C+Gerard+T%3BShemeta%2C+Julie%3BPaulsson%2C+Bjorn%3BXiao%2C+Xiang%3BHornby%2C+Brian%3BKarrenbach%2C+Martin%3BFehler%2C+Mike%3BHardage%2C+Bob+A%3BHuang%2C+Lianjie%3BYu%2C+Grace%3BYu%2C+Jianhua&rft.aulast=Zhao&rft.aufirst=Xiaomin&rft.date=2015-08-01&rft.volume=3&rft.issue=3&rft.spage=SW51&rft.isbn=&rft.btitle=&rft.title=Interpretation+%28Tulsa%29&rft.issn=23248858&rft_id=info:doi/10.1190%2FINT-2014-0240.1 L2 - http://library.seg.org/journal/inteio LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 7 N1 - PubXState - OK N1 - Document feature - illus. N1 - SuppNotes - Online First N1 - Last updated - 2016-01-14 N1 - SubjectsTermNotLitGenreText - boreholes; dip; geometry; geophysical methods; geophysical profiles; geophysical surveys; Kirchhoff integral; prestack migration; seismic methods; seismic migration; seismic profiles; surveys; vertical seismic profiles DO - http://dx.doi.org/10.1190/INT-2014-0240.1 ER - TY - JOUR T1 - Performance upgrades to the MCNP6 burnup capability for large scale depletion calculations AN - 1732815135; PQ0002161634 AB - The first MCNP based inline Monte Carlo depletion capability was officially released from the Radiation Safety Information and Computational Center as MCNPX 2.6.0. With the merger of MCNPX and MCNP5, MCNP6 combined the capability of both simulation tools, as well as providing new advanced technology, in a single radiation transport code. The new MCNP6 depletion capability was first showcased at the International Congress for Advancements in Nuclear Power Plants (ICAPP) meeting in 2012. At that conference the new capabilities addressed included the combined distributive and shared memory parallel architecture for the burnup capability, improved memory management, physics enhancements, and new predictability as compared to the H.B Robinson Benchmark. At Los Alamos National Laboratory, a special purpose cluster named "tebow," was constructed such to maximize available RAM per CPU, as well as leveraging swap space with solid state hard drives, to allow larger scale depletion calculations (allowing for significantly more burnable regions than previously examined). As the MCNP6 burnup capability was scaled to larger numbers of burnable regions, a noticeable slowdown was realized. This paper details two specific computational performance strategies for improving calculation speedup: (1) retrieving cross sections during transport: and (2) tallying mechanisms specific to burnup in MCNP. To combat this slowdown new performance upgrades were developed and integrated into MCNP6 1.2. JF - Progress in Nuclear Energy AU - Fensin, M L AU - Galloway, J D AU - James, M R AD - Los Alamos National Laboratory, MS C921, Los Alamos, NM 87545, USA, mfensin@lanl.gov Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 186 EP - 190 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 83 SN - 0149-1970, 0149-1970 KW - Health & Safety Science Abstracts; Environment Abstracts KW - MCNP6 KW - Monte Carlo linked burnup KW - Burnup KW - Monte Carlo simulation KW - Nuclear power plants KW - Mergers and acquisitions KW - Conferences KW - Radiation KW - Congress KW - Simulation KW - Nuclear energy KW - USA, New Mexico, Los Alamos KW - Benchmarks KW - Technology KW - ENA 03:Energy KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732815135?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Progress+in+Nuclear+Energy&rft.atitle=Performance+upgrades+to+the+MCNP6+burnup+capability+for+large+scale+depletion+calculations&rft.au=Fensin%2C+M+L%3BGalloway%2C+J+D%3BJames%2C+M+R&rft.aulast=Fensin&rft.aufirst=M&rft.date=2015-08-01&rft.volume=83&rft.issue=&rft.spage=186&rft.isbn=&rft.btitle=&rft.title=Progress+in+Nuclear+Energy&rft.issn=01491970&rft_id=info:doi/10.1016%2Fj.pnucene.2015.03.017 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Monte Carlo simulation; Mergers and acquisitions; Nuclear power plants; Radiation; Conferences; Congress; Simulation; Nuclear energy; Benchmarks; Technology; USA, New Mexico, Los Alamos DO - http://dx.doi.org/10.1016/j.pnucene.2015.03.017 ER - TY - JOUR T1 - In situ evidence for continental crust on early Mars AN - 1722156698; 2015-099180 JF - Nature Geoscience AU - Sautter, V AU - Toplis, M J AU - Wiens, R C AU - Cousin, A AU - Fabre, C AU - Gasnault, O AU - Maurice, S AU - Forni, O AU - Lasue, J AU - Ollila, A AU - Bridges, J C AU - Mangold, N AU - Le Mouelic, S AU - Fisk, M AU - Meslin, P Y AU - Beck, P AU - Pinet, P AU - Le Deit, L AU - Rapin, W AU - Stolper, E M AU - Newsom, H AU - Dyar, D AU - Vaniman, D AU - Clegg, S AU - Wray, J J Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 605 EP - 609 PB - Nature Publishing Group, London VL - 8 IS - 8 SN - 1752-0894, 1752-0894 KW - volcanic rocks KW - stony meteorites KW - in situ KW - textures KW - Martian meteorites KW - igneous rocks KW - magmatism KW - Mars KW - continental crust KW - achondrites KW - Gale Crater KW - terrestrial planets KW - planets KW - meteorites KW - plutonic rocks KW - mineral composition KW - diorites KW - Curiosity Rover KW - basalts KW - Mars Science Laboratory Mission KW - geochemistry KW - crust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722156698?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+Geoscience&rft.atitle=In+situ+evidence+for+continental+crust+on+early+Mars&rft.au=Sautter%2C+V%3BToplis%2C+M+J%3BWiens%2C+R+C%3BCousin%2C+A%3BFabre%2C+C%3BGasnault%2C+O%3BMaurice%2C+S%3BForni%2C+O%3BLasue%2C+J%3BOllila%2C+A%3BBridges%2C+J+C%3BMangold%2C+N%3BLe+Mouelic%2C+S%3BFisk%2C+M%3BMeslin%2C+P+Y%3BBeck%2C+P%3BPinet%2C+P%3BLe+Deit%2C+L%3BRapin%2C+W%3BStolper%2C+E+M%3BNewsom%2C+H%3BDyar%2C+D%3BVaniman%2C+D%3BClegg%2C+S%3BWray%2C+J+J&rft.aulast=Sautter&rft.aufirst=V&rft.date=2015-08-01&rft.volume=8&rft.issue=8&rft.spage=605&rft.isbn=&rft.btitle=&rft.title=Nature+Geoscience&rft.issn=17520894&rft_id=info:doi/10.1038%2FNGE02474 L2 - http://www.nature.com/ngeo/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 31 N1 - Document feature - illus. N1 - Last updated - 2015-10-15 N1 - SubjectsTermNotLitGenreText - achondrites; basalts; continental crust; crust; Curiosity Rover; diorites; Gale Crater; geochemistry; igneous rocks; in situ; magmatism; Mars; Mars Science Laboratory Mission; Martian meteorites; meteorites; mineral composition; planets; plutonic rocks; stony meteorites; terrestrial planets; textures; volcanic rocks DO - http://dx.doi.org/10.1038/NGE02474 ER - TY - JOUR T1 - Dynamic Variation in Sexual Contact Rates in a Cohort of HIV-Negative Gay Men AN - 1717489577; PQ0001938045 AB - Human immunodeficiency virus (HIV) transmission models that include variability in sexual behavior over time have shown increased incidence, prevalence, and acute-state transmission rates for a given population risk profile. This raises the question of whether dynamic variation in individual sexual behavior is a real phenomenon that can be observed and measured. To study this dynamic variation, we developed a model incorporating heterogeneity in both between-person and within-person sexual contact patterns. Using novel methodology that we call iterated filtering for longitudinal data, we fitted this model by maximum likelihood to longitudinal survey data from the Centers for Disease Control and Prevention's Collaborative HIV Seroincidence Study (1992-1995). We found evidence for individual heterogeneity in sexual behavior over time. We simulated an epidemic process and found that inclusion of empirically measured levels of dynamic variation in individual-level sexual behavior brought the theoretical predictions of HIV incidence into closer alignment with reality given the measured per-act probabilities of transmission. The methods developed here provide a framework for quantifying variation in sexual behaviors that helps in understanding the HIV epidemic among gay men. JF - American Journal of Epidemiology AU - Romero-Severson, E O AU - Volz, E AU - Koopman, J S AU - Leitner, T AU - Ionides, E L AD - Correspondence to Dr. E. O. Romero-Severson, Theoretical Biology and Biophysics Group, Los Alamos National Laboratory, P.O. Box 1663, Mailstop K710, Los Alamos, NM 87545., eoromero@lanl.gov Y1 - 2015/08/01/ PY - 2015 DA - 2015 Aug 01 SP - 255 EP - 262 PB - Oxford University Press, Great Clarendon Street Oxford OX2 6DP United Kingdom VL - 182 IS - 3 SN - 0002-9262, 0002-9262 KW - Virology & AIDS Abstracts; Risk Abstracts; Health & Safety Science Abstracts KW - disease transmission KW - gay men KW - HIV KW - HIV risk KW - iterated filtering KW - partially observed Markov process KW - sexual behavior KW - Prediction KW - Data processing KW - Epidemics KW - Disease control KW - Risk taking KW - Homosexuality KW - Sexual behavior KW - Models KW - Disease transmission KW - Prevention KW - Human immunodeficiency virus KW - H 6000:Natural Disasters/Civil Defense/Emergency Management KW - V 22360:AIDS and HIV KW - R2 23060:Medical and environmental health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1717489577?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Journal+of+Epidemiology&rft.atitle=Dynamic+Variation+in+Sexual+Contact+Rates+in+a+Cohort+of+HIV-Negative+Gay+Men&rft.au=Romero-Severson%2C+E+O%3BVolz%2C+E%3BKoopman%2C+J+S%3BLeitner%2C+T%3BIonides%2C+E+L&rft.aulast=Romero-Severson&rft.aufirst=E&rft.date=2015-08-01&rft.volume=182&rft.issue=3&rft.spage=255&rft.isbn=&rft.btitle=&rft.title=American+Journal+of+Epidemiology&rft.issn=00029262&rft_id=info:doi/10.1093%2Faje%2Fkwv044 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Epidemics; Data processing; Disease control; Sexual behavior; Disease transmission; Models; Prediction; Prevention; Human immunodeficiency virus; Risk taking; Homosexuality DO - http://dx.doi.org/10.1093/aje/kwv044 ER - TY - JOUR T1 - Crystalline Control of {111} Bounded Pt3Cu Nanocrystals: Multiply-Twinned Pt3Cu Icosahedra with Enhanced Electrocatalytic Properties. AN - 1700103399; 26172056 AB - Despite that different facets have distinct catalytic behavior, the important role of twin defects on enhancing the catalytic performance of metallic nanocrystals is largely unrevealed. The key challenge in demonstrating the importance of twin defects for catalysis is the extreme difficulties in creating nanostructures with the same exposed facets but tunable twin defects that are suitable for catalytic investigations. Herein, we show an efficient synthetic strategy to selectively synthesize {111}-terminated Pt3Cu nanocrystals with controllable crystalline features. Two distinct {111}-bounded shapes, namely, multiply-twinned Pt3Cu icosahedra and single-crystalline Pt3Cu octahedra, are successfully prepared by simply changing the types of Cu precursors with the other growth parameters unchanged. Electrocatalytic studies show that the {111}-terminated Pt3Cu nanocrystals exhibit the very interesting crystalline nature-dependent electrocatalytic activities toward both the oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) with multiply-twinned Pt3Cu icosahedra demonstrating enhanced electrocatalytic activities compared to the single-crystalline Pt3Cu octahedra due to their additional yet important effect of twin defect. As a result, under the multiple tuning conditions (alloy, shape, and twin effects), the multiply-twinned Pt3Cu icosahedra exhibit much enhanced electrocatalytic activities in both ORR and MOR with respect to the Pt black. The present work highlights the importance of twin defects in enhancing electrocatalytic activities of metallic nanocrystals. JF - ACS nano AU - Sun, Xiuhui AU - Jiang, Kezhu AU - Zhang, Nan AU - Guo, Shaojun AU - Huang, Xiaoqing AD - †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu 215123, China. ; ‡Physical Chemistry and Applied Spectroscopy, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States. Y1 - 2015/07/28/ PY - 2015 DA - 2015 Jul 28 SP - 7634 EP - 7640 VL - 9 IS - 7 KW - copper KW - Platinum KW - electrocatalyst KW - twin defect KW - icosahedron UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700103399?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Crystalline+Control+of+%7B111%7D+Bounded+Pt3Cu+Nanocrystals%3A+Multiply-Twinned+Pt3Cu+Icosahedra+with+Enhanced+Electrocatalytic+Properties.&rft.au=Sun%2C+Xiuhui%3BJiang%2C+Kezhu%3BZhang%2C+Nan%3BGuo%2C+Shaojun%3BHuang%2C+Xiaoqing&rft.aulast=Sun&rft.aufirst=Xiuhui&rft.date=2015-07-28&rft.volume=9&rft.issue=7&rft.spage=7634&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Facsnano.5b02986 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-11-23 N1 - Date created - 2015-07-28 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsnano.5b02986 ER - TY - JOUR T1 - Preparation of Cd/Pb Chalcogenide Heterostructured Janus Particles via Controllable Cation Exchange. AN - 1700103194; 26161785 AB - We developed a strategy for producing quasi-spherical nanocrystals of anisotropic heterostructures of Cd/Pb chalcogenides. The nanostructures are fabricated via a controlled cation exchange reaction where the Cd(2+) cation is exchanged for the Pb(2+) cation. The cation exchange reaction is thermally activated and can be controlled by adjusting the reaction temperature or time. We characterized the particles using TEM, XPS, PL, and absorption spectroscopy. With complete exchange, high quality Pb-chalcogenide quantum dots are produced. In addition to Cd(2+), we also find suitable conditions for the exchange of Zn(2+) cations for Pb(2+) cations. The cation exchange is anisotropic starting at one edge of the nanocrystals and proceeds along the ⟨111⟩ direction producing a sharp interface at a (111) crystallographic plane. Instead of spherical core/shell structures, we produced and studied quasi-spherical CdS/PbS and CdSe/PbSe Janus-type heterostructures. Nontrivial PL behavior was observed from the CdS(e)/PbS(e) heterostructures as the Pb:Cd ratio is increased. JF - ACS nano AU - Zhang, Jianbing AU - Chernomordik, Boris D AU - Crisp, Ryan W AU - Kroupa, Daniel M AU - Luther, Joseph M AU - Miller, Elisa M AU - Gao, Jianbo AU - Beard, Matthew C AD - †School of Optical and Electronic Information, Huazhong University of Science and Technology, Hubei 430074, China. ; ‡Chemical and Material Sciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States. ; ⊥Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States. Y1 - 2015/07/28/ PY - 2015 DA - 2015 Jul 28 SP - 7151 EP - 7163 VL - 9 IS - 7 KW - heterostructures KW - cation-exchange reactions KW - quantum dots KW - lead chalcogenide KW - synthesis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700103194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Preparation+of+Cd%2FPb+Chalcogenide+Heterostructured+Janus+Particles+via+Controllable+Cation+Exchange.&rft.au=Zhang%2C+Jianbing%3BChernomordik%2C+Boris+D%3BCrisp%2C+Ryan+W%3BKroupa%2C+Daniel+M%3BLuther%2C+Joseph+M%3BMiller%2C+Elisa+M%3BGao%2C+Jianbo%3BBeard%2C+Matthew+C&rft.aulast=Zhang&rft.aufirst=Jianbing&rft.date=2015-07-28&rft.volume=9&rft.issue=7&rft.spage=7151&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Facsnano.5b01859 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-11-23 N1 - Date created - 2015-07-28 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsnano.5b01859 ER - TY - JOUR T1 - Instability of a periodic flow in geostrophic and hydrostatic balance AN - 1765946970; PQ0002461141 AB - Instability of a flow in geostrophic and hydrostatic balance is investigated using numerical simulations of the fully nonlinear, rotating, stratified Boussinesq equations. Burger numbers less than one and small aspect ratio are considered. Although the model we consider has continuous stratification in the vertical, in terms of phenomenology, the large scale baroclinic instability we find is most closely related to that found in the classical setting of Eady 1949 [8]. Indeed, the growth rate and scale of the most unstable mode scale similarly. The advantage of the model we consider lies in being able to use it in studies of unbalanced processes. Preliminary experimentation suggests that there is a small scale instability at small values of Burger number. This instability is initiated in anticyclonic regions, is likely imbalanced, and likely leads to small scale dissipation. By considering two measures of balance-one based on a wave-vortex decomposition and another based on the quasi-geostrophic omega equation-we study the dependence of imbalance on Rossby number. We, however, find that kinetic energy spectra display slopes consistent with quasi-geostrophic turbulence, with no break in slope at high wavenumbers. JF - Computers & Fluids AU - Simon, Guillaume AU - Nadiga, Balasubramanya T AD - Computer, Computational and Statistical Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, USA, gsimon@lanl.gov Y1 - 2015/07/22/ PY - 2015 DA - 2015 Jul 22 SP - 173 EP - 191 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 115 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Baroclinic instability KW - Quasi-geostrophic turbulence KW - Rotating flows KW - Stratified flows KW - Unbalanced instability KW - Growth rate KW - Mathematical models KW - Rossby number KW - Energy spectra KW - Computers KW - Stratification KW - Growth Rates KW - Omega KW - turbulence KW - Decomposition KW - Model Studies KW - Kinetic Energy KW - Wave spectra KW - Hydrostatics KW - Wave slope KW - Slopes KW - SW 0810:General KW - Q2 09183:Physics and chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765946970?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Fluids&rft.atitle=Instability+of+a+periodic+flow+in+geostrophic+and+hydrostatic+balance&rft.au=Simon%2C+Guillaume%3BNadiga%2C+Balasubramanya+T&rft.aulast=Simon&rft.aufirst=Guillaume&rft.date=2015-07-22&rft.volume=115&rft.issue=&rft.spage=173&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/10.1016%2Fj.compfluid.2015.03.014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Wave spectra; Growth rate; Mathematical models; Rossby number; Energy spectra; Baroclinic instability; Hydrostatics; Wave slope; Omega; Computers; Growth Rates; Stratification; turbulence; Slopes; Decomposition; Kinetic Energy; Model Studies DO - http://dx.doi.org/10.1016/j.compfluid.2015.03.014 ER - TY - JOUR T1 - Trimetallic PtSnRh Wavy Nanowires as Efficient Nanoelectrocatalysts for Alcohol Electrooxidation. AN - 1696887195; 26098177 AB - The design and creation of efficient catalysts for alcohol oxidation reaction has attracted great research attention because alcohols are promising fuels for direct fuel cell reactions because of their high energy density, easy storage, and transportation. We herein report an efficient strategy that allows the preparation of ternary PtSnM (M=Co, Ni, and Rh) wavy nanowires (WNWs) with ultrathin diameter of only around 2 nm and tunable compositions in high yield. Detailed catalytic studies show that all the ternary WNWs exhibit high performance for ethanol oxidation reaction (EOR) and methanol oxidation reaction (MOR), and their performance shows interesting composition-dependent electrocatalytic activity with PtSnRh WNWs having the best activity for both EOR and MOR. The PtSnRh WNWs are also more stable than commercial Pt/C catalyst, as revealed by long-time chronoamperometric (CA) measurements. The present work highlights the use of multimetallic WNWs as highly active and durable nanocatalysts in enhancing alcohol electrooxidation, which will open a new way in tuning 1D multimetallic nanostructures for boosting other fuel cell reactions, various heterogeneous reactions, and beyond. JF - ACS applied materials & interfaces AU - Jiang, Kezhu AU - Bu, Lingzheng AU - Wang, Pengtang AU - Guo, Shaojun AU - Huang, Xiaoqing AD - †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China. ; ‡Physical Chemistry and Applied Spectroscopy, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States. Y1 - 2015/07/15/ PY - 2015 DA - 2015 Jul 15 SP - 15061 EP - 15067 VL - 7 IS - 27 KW - platinum KW - rhodium KW - wavy nanowires KW - alcohol electrooxidation KW - tin UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696887195?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+applied+materials+%26+interfaces&rft.atitle=Trimetallic+PtSnRh+Wavy+Nanowires+as+Efficient+Nanoelectrocatalysts+for+Alcohol+Electrooxidation.&rft.au=Jiang%2C+Kezhu%3BBu%2C+Lingzheng%3BWang%2C+Pengtang%3BGuo%2C+Shaojun%3BHuang%2C+Xiaoqing&rft.aulast=Jiang&rft.aufirst=Kezhu&rft.date=2015-07-15&rft.volume=7&rft.issue=27&rft.spage=15061&rft.isbn=&rft.btitle=&rft.title=ACS+applied+materials+%26+interfaces&rft.issn=1944-8252&rft_id=info:doi/10.1021%2Facsami.5b04391 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-10-15 N1 - Date created - 2015-07-15 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsami.5b04391 ER - TY - JOUR T1 - Land subsidence due to groundwater withdrawal in the northern Beijing Plain, China AN - 1780802640; 2016-031885 AB - Beijing is an international metropolis, where over-exploration of water resource makes land subsidence becoming more and more serious. The related problems cannot be avoided in the coming years because of the giant increase of population. The aims of this study are to quantify land subsidence over the period 2003 to 2010, grasp the evolution of the process, and investigate the relation with the triggering factors in the northern area of the Beijing plain. Various data, including deep compaction from vertical multiple borehole extensometers, land subsidence from Persistent Scatterer Interferometry and leveling surveys, groundwater levels, hydrogeological setting from wellbores, and Landsat TM image were collected and effectively used to detect the spatial and temporal features of land subsidence and its possible relation with groundwater level changes, compressible layer thickness, and urban development. Results show that land subsidence is unevenly distributed and continuously increased from 2003 to 2010. The average loss of elevation over the monitoring period amounted to 92.5 mm, with rates up to 52 mm/y. The distribution of the subsidence bowl is only partially consistent with that of the groundwater depression cone because of the variable thickness of the most compressible fine deposits. In fact, extensometers reveal that silty-clay layers account for the larger contribution to land subsidence, with the 15 m thick silty-clay layer between 102 and 117 m depth accounting for about 25% of the total subsidence. Finally, no clear correlation has been observed between the subsidence rates and the increase of the load on the land surface connected to the impressive urban development. This study represents a first step toward the development of a physically-based model of the subsidence occurrence to be used for planning remediation strategies in the northern Beijing plain. Abstract Copyright (2015) Elsevier, B.V. JF - Engineering Geology AU - Zhu, Lin AU - Gong, Huili AU - Li, Xiaojuan AU - Wang, Rong AU - Chen, Beibei AU - Dai, Zhenxue AU - Teatini, Pietro Y1 - 2015/07/02/ PY - 2015 DA - 2015 Jul 02 SP - 243 EP - 255 PB - Elsevier, Amsterdam VL - 193 SN - 0013-7952, 0013-7952 KW - Far East KW - geologic hazards KW - engineering properties KW - pumping KW - radar methods KW - extensometers KW - land subsidence KW - deformation KW - interferometry KW - ground water KW - compaction KW - geographic information systems KW - Beijing Plain KW - SAR KW - natural hazards KW - Hebei China KW - information systems KW - Beijing China KW - InSAR KW - Asia KW - China KW - 30:Engineering geology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780802640?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Engineering+Geology&rft.atitle=Land+subsidence+due+to+groundwater+withdrawal+in+the+northern+Beijing+Plain%2C+China&rft.au=Zhu%2C+Lin%3BGong%2C+Huili%3BLi%2C+Xiaojuan%3BWang%2C+Rong%3BChen%2C+Beibei%3BDai%2C+Zhenxue%3BTeatini%2C+Pietro&rft.aulast=Zhu&rft.aufirst=Lin&rft.date=2015-07-02&rft.volume=193&rft.issue=&rft.spage=243&rft.isbn=&rft.btitle=&rft.title=Engineering+Geology&rft.issn=00137952&rft_id=info:doi/10.1016%2Fj.enggeo.2015.04.020 L2 - http://www.sciencedirect.com/science/journal/00137952 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 54 N1 - Document feature - illus. incl. sect., strat. col., 1 table, geol. sketch maps N1 - Last updated - 2016-04-14 N1 - CODEN - EGGOAO N1 - SubjectsTermNotLitGenreText - Asia; Beijing China; Beijing Plain; China; compaction; deformation; engineering properties; extensometers; Far East; geographic information systems; geologic hazards; ground water; Hebei China; information systems; InSAR; interferometry; land subsidence; natural hazards; pumping; radar methods; SAR DO - http://dx.doi.org/10.1016/j.enggeo.2015.04.020 ER - TY - JOUR T1 - A high-order vertex-based central ENO finite-volume scheme for three-dimensional compressible flows AN - 1709187407; PQ0001641806 AB - High-order discretization methods offer the potential to reduce the computational cost associated with modeling compressible flows. However, it is difficult to obtain accurate high-order discretizations of conservation laws that do not produce spurious oscillations near discontinuities, especially on multi-dimensional unstructured meshes. A novel, high-order, central essentially non-oscillatory (CENO) finite-volume method that does not have these difficulties is proposed for tetrahedral meshes. The proposed unstructured method is vertex-based, which differs from existing cell-based CENO formulations, and uses a hybrid reconstruction procedure that switches between two different solution representations. It applies a high-order k-exact reconstruction in smooth regions and a limited linear reconstruction when discontinuities are encountered. Both reconstructions use a single, central stencil for all variables, making the application of CENO to arbitrary unstructured meshes relatively straightforward. The new approach was applied to the conservation equations governing compressible flows and assessed in terms of accuracy and computational cost. For all problems considered, which included various function reconstructions and idealized flows, CENO demonstrated excellent reliability and robustness. Up to fifth-order accuracy was achieved in smooth regions and essentially non-oscillatory solutions were obtained near discontinuities. The high-order schemes were also more computationally efficient for high-accuracy solutions, i.e., they took less wall time than the lower-order schemes to achieve a desired level of error. In one particular case, it took a factor of 24 less wall-time to obtain a given level of error with the fourth-order CENO scheme than to obtain the same error with the second-order scheme. JF - Computers & Fluids AU - Charest, Marc RJ AU - Canfield, Thomas R AU - Morgan, Nathaniel R AU - Waltz, Jacob AU - Wohlbier, John G AD - Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, United States, charest@lanl.gov Y1 - 2015/07/02/ PY - 2015 DA - 2015 Jul 02 SP - 172 EP - 192 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 114 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Numerical algorithms KW - Computational fluid dynamics KW - High-order methods KW - Compressible flows KW - Shock hydrodynamics KW - Costs KW - Conservation equations KW - Computers KW - Hybrids KW - Conservation KW - Errors KW - Compressible Flow KW - Model Studies KW - Q2 09422:Storage and transport KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709187407?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Fluids&rft.atitle=A+high-order+vertex-based+central+ENO+finite-volume+scheme+for+three-dimensional+compressible+flows&rft.au=Charest%2C+Marc+RJ%3BCanfield%2C+Thomas+R%3BMorgan%2C+Nathaniel+R%3BWaltz%2C+Jacob%3BWohlbier%2C+John+G&rft.aulast=Charest&rft.aufirst=Marc&rft.date=2015-07-02&rft.volume=114&rft.issue=&rft.spage=172&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/10.1016%2Fj.compfluid.2015.03.001 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Conservation equations; Hybrids; Costs; Computers; Conservation; Errors; Compressible Flow; Model Studies DO - http://dx.doi.org/10.1016/j.compfluid.2015.03.001 ER - TY - JOUR T1 - Darcy's law predicts widespread forest mortality under climate warming AN - 1773838343; PQ0002697757 AB - Drought and heat-induced tree mortality is accelerating in many forest biomes as a consequence of a warming climate, resulting in a threat to global forests unlike any in recorded history. Forests store the majority of terrestrial carbon, thus their loss may have significant and sustained impacts on the global carbon cycle. We use a hydraulic corollary to Darcy's law, a core principle of vascular plant physiology, to predict characteristics of plants that will survive and die during drought under warmer future climates. Plants that are tall with isohydric stomatal regulation, low hydraulic conductance, and high leaf area are most likely to die from future drought stress. Thus, tall trees of old-growth forests are at the greatest risk of loss, which has ominous implications for terrestrial carbon storage. This application of Darcy's law indicates today's forests generally should be replaced by shorter and more xeric plants, owing to future warmer droughts and associated wildfires and pest attacks. The Darcy's corollary also provides a simple, robust framework for informing forest management interventions needed to promote the survival of current forests. Given the robustness of Darcy's law for predictions of vascular plant function, we conclude with high certainty that today's forests are going to be subject to continued increases in mortality rates that will result in substantial reorganization of their structure and carbon storage. JF - Nature Climate Change AU - McDowell, Nathan G AU - Allen, Craig D AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, MS J495, Los Alamos, New Mexico 87545, USA Y1 - 2015/07// PY - 2015 DA - July 2015 SP - 669 EP - 672 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 5 IS - 7 SN - 1758-678X, 1758-678X KW - Environment Abstracts; Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts KW - Pest attack KW - Hydraulics KW - Forest management KW - Trees KW - Climate change KW - Intervention KW - Forests KW - Drought KW - Carbon sequestration KW - Droughts KW - Mortality KW - Darcy's law KW - Climate KW - Climate warming KW - Carbon cycle KW - Stress KW - Carbon storage KW - Wildfire KW - Plant physiology KW - Global warming KW - Future climates KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development KW - ENA 20:Weather Modification & Geophysical Change UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773838343?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+Climate+Change&rft.atitle=Darcy%27s+law+predicts+widespread+forest+mortality+under+climate+warming&rft.au=McDowell%2C+Nathan+G%3BAllen%2C+Craig+D&rft.aulast=McDowell&rft.aufirst=Nathan&rft.date=2015-07-01&rft.volume=5&rft.issue=7&rft.spage=669&rft.isbn=&rft.btitle=&rft.title=Nature+Climate+Change&rft.issn=1758678X&rft_id=info:doi/10.1038%2Fnclimate2641 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Forest management; Plant physiology; Darcy's law; Climate change; Climate warming; Carbon cycle; Global warming; Drought; Carbon storage; Future climates; Pest attack; Mortality; Hydraulics; Trees; Climate; Forests; Stress; Intervention; Carbon sequestration; Wildfire; Droughts DO - http://dx.doi.org/10.1038/nclimate2641 ER - TY - JOUR T1 - X-ray reflectivity and grazing incidence diffraction studies of interaction between human adhesion/growth-regulatory galectin-1 and DPPE-GM1 lipid monolayer at an air/water interface AN - 1773837213; PQ0001877290 AB - The specific interaction of ganglioside GM1 with the homodimeric (prototype) endogenous lectin galectin-1 triggers growth regulation in tumor and activated effector T cells. This proven biorelevance directed interest to studying association of the lectin to a model surface, i.e. a 1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamin e/ganglioside GM1 (80: 20 mol%) monolayer, at a bioeffective concentration. Surface expansion by the lectin insertion was detected at a surface pressure of 20 mN/m. On combining the methods of grazing incidence X-ray diffraction and X-ray reflectivity, a transient decrease in lipid-ordered phase of the monolayer was observed. The measured electron density distribution indicated that galectin-1 is oriented with its long axis in the surface plane, ideal for cis-crosslinking. The data reveal a conspicuous difference to the way the pentameric lectin part of the cholera toxin, another GM1-specific lectin, is bound to the monolayer. They also encourage further efforts to monitor effects of structurally different members of the galectin family such as the functionally antagonistic chimera-type galectin-3. JF - Biochemistry (Moscow) AU - Majewski, J AU - Andre, S AU - Jones, E AU - Chi, E AU - Gabius, H-J AD - Neutron Scattering Center, Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM, USA, gabius@tiph.vetmed.uni-muenchen.de Y1 - 2015/07// PY - 2015 DA - July 2015 SP - 943 EP - 956 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 80 IS - 7 SN - 0006-2979, 0006-2979 KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 1: Biological Sciences & Living Resources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773837213?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biochemistry+%28Moscow%29&rft.atitle=X-ray+reflectivity+and+grazing+incidence+diffraction+studies+of+interaction+between+human+adhesion%2Fgrowth-regulatory+galectin-1+and+DPPE-GM1+lipid+monolayer+at+an+air%2Fwater+interface&rft.au=Majewski%2C+J%3BAndre%2C+S%3BJones%2C+E%3BChi%2C+E%3BGabius%2C+H-J&rft.aulast=Majewski&rft.aufirst=J&rft.date=2015-07-01&rft.volume=80&rft.issue=7&rft.spage=943&rft.isbn=&rft.btitle=&rft.title=Biochemistry+%28Moscow%29&rft.issn=00062979&rft_id=info:doi/10.1134%2FS0006297915070135 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Number of references - 82 N1 - Last updated - 2016-03-17 DO - http://dx.doi.org/10.1134/S0006297915070135 ER - TY - JOUR T1 - Resonant ultrasound spectroscopy for materials with high damping and samples of arbitrary geometry AN - 1773797172; 2016-024693 AB - Resonant ultrasound spectroscopy (RUS) is a powerful and established technique for measuring elastic constants of a material with general anisotropy. The first step of this technique consists of extracting resonance frequencies and damping from the vibrational frequency spectrum measured on a sample with free boundary conditions. An inversion technique is then used to retrieve the elastic tensor from the measured resonance frequencies. As originally developed, RUS has been mostly applicable to (i) materials with small damping such that the resonances of the sample are well separated and (ii) samples with simple geometries for which analytical solutions exist. In this paper, these limitations are addressed with a new RUS approach adapted to materials with high damping and samples of arbitrary geometry. Resonances are extracted by fitting a sum of exponentially damped sinusoids to the measured frequency spectrum. The inversion of the elastic tensor is achieved with a genetic algorithm, which allows searching for a global minimum within a discrete and relatively wide solution space. First, the accuracy of the proposed approach is evaluated against numerical data simulated for samples with isotropic symmetry and transversely isotropic symmetry. Subsequently, the applicability of the approach is demonstrated using experimental data collected on a composite structure consisting of a cylindrical sample of Berea sandstone glued to a large piezoelectric disk. In the proposed experiments, RUS is further enhanced by the use of a 3-D laser vibrometer allowing the visualization of most of the modes in the frequency band studied. Abstract Copyright (2015), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Remillieux, Marcel C AU - Ulrich, T J AU - Payan, Cedric AU - Riviere, Jacques AU - Lake, Colton R AU - Le Bas, Pierre-Yves Y1 - 2015/07// PY - 2015 DA - July 2015 SP - 4898 EP - 4916 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 7 SN - 2169-9313, 2169-9313 KW - attenuation KW - genetic algorithms KW - vibration KW - mechanical properties KW - mathematical models KW - elastic constants KW - algorithms KW - anisotropy KW - rock mechanics KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773797172?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Resonant+ultrasound+spectroscopy+for+materials+with+high+damping+and+samples+of+arbitrary+geometry&rft.au=Remillieux%2C+Marcel+C%3BUlrich%2C+T+J%3BPayan%2C+Cedric%3BRiviere%2C+Jacques%3BLake%2C+Colton+R%3BLe+Bas%2C+Pierre-Yves&rft.aulast=Remillieux&rft.aufirst=Marcel&rft.date=2015-07-01&rft.volume=120&rft.issue=7&rft.spage=4898&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2015JB011932 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 22 N1 - PubXState - DC N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - algorithms; anisotropy; attenuation; elastic constants; genetic algorithms; mathematical models; mechanical properties; rock mechanics; vibration DO - http://dx.doi.org/10.1002/2015JB011932 ER - TY - JOUR T1 - Ideal sinks are not always ideal: Radiation damage accumulation in nanocomposites AN - 1732840321; PQ0002249613 AB - Designing radiation tolerant materials is one of the primary challenges associated with advanced nuclear energy systems. One attractive route that has received much attention world-wide is to introduce a high density of sinks, often in the form of interfaces or secondary phases. Here, we develop a simple model of such nanocomposites and examine the ramifications of various factors on the overall radiation stability of the material. In particular, we determine how the distribution of secondary phases, the relative sink strength of those phases, and the irradiation temperature influence the radiation tolerance of the matrix. We find that the best scenario is one in which the sinks have intermediate strength, transiently trapping defects before releasing them back into the matrix. Neither perfect sinks nor the complete absence of sinks perform as well. This provides new insight into the optimal properties of nanocomposites for radiation damage environments. JF - Journal of Nuclear Materials AU - Uberuaga, Blas Pedro AU - Choudhury, Samrat AU - Caro, Alfredo AD - Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, blas@lanl.gov PY - 2015 SP - 402 EP - 408 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 462 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Radiation KW - Irradiation KW - Radioactive materials KW - Temperature KW - Nuclear energy KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732840321?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Ideal+sinks+are+not+always+ideal%3A+Radiation+damage+accumulation+in+nanocomposites&rft.au=Uberuaga%2C+Blas+Pedro%3BChoudhury%2C+Samrat%3BCaro%2C+Alfredo&rft.aulast=Uberuaga&rft.aufirst=Blas&rft.date=2015-07-01&rft.volume=462&rft.issue=&rft.spage=402&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.11.073 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Number of references - 30 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Radiation; Irradiation; Radioactive materials; Temperature; Nuclear energy DO - http://dx.doi.org/10.1016/j.jnucmat.2014.11.073 ER - TY - JOUR T1 - Multiscale simulation of xenon diffusion and grain boundary segregation in UO sub(2) AN - 1732840293; PQ0002249569 AB - In light water reactor fuel, gaseous fission products segregate to grain boundaries, resulting in the nucleation and growth of large intergranular fission gas bubbles. The segregation rate is controlled by diffusion of fission gas atoms through the grains and interaction with the boundaries. Based on the mechanisms established from earlier density functional theory (DFT) and empirical potential calculations, diffusion models for xenon (Xe), uranium (U) vacancies and U interstitials in UO sub(2) have been derived for both intrinsic (no irradiation) and irradiation conditions. Segregation of Xe to grain boundaries is described by combining the bulk diffusion model with a model for the interaction between Xe atoms and three different grain boundaries in UO sub(2) ( capital sigma 5 tilt, capital sigma 5 twist and a high angle random boundary), as derived from atomistic calculations. The present model does not attempt to capture nucleation or growth of fission gas bubbles at the grain boundaries. The point defect and Xe diffusion and segregation models are implemented in the MARMOT phase field code, which is used to calculate effective Xe and U diffusivities as well as to simulate Xe redistribution for a few simple microstructures. JF - Journal of Nuclear Materials AU - Andersson, David A AU - Tonks, Michael R AU - Casillas, Luis AU - Vyas, Shyam AU - Nerikar, Pankaj AU - Uberuaga, Blas P AU - Stanek, Christopher R AD - Materials Science and Technology Division, Los Alamos National Laboratory P.O. Box 1663, Los Alamos, NM 87545, USA, andersson@lanl.gov PY - 2015 SP - 15 EP - 25 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 462 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Fission products KW - Xenon KW - Nuclear reactors KW - Irradiation KW - Uranium KW - Fuels KW - Radioactive materials KW - Simulation KW - Diffusion KW - Grains KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732840293?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Multiscale+simulation+of+xenon+diffusion+and+grain+boundary+segregation+in+UO+sub%282%29&rft.au=Andersson%2C+David+A%3BTonks%2C+Michael+R%3BCasillas%2C+Luis%3BVyas%2C+Shyam%3BNerikar%2C+Pankaj%3BUberuaga%2C+Blas+P%3BStanek%2C+Christopher+R&rft.aulast=Andersson&rft.aufirst=David&rft.date=2015-07-01&rft.volume=462&rft.issue=&rft.spage=15&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2015.03.019 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Number of references - 57 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Fission products; Nuclear reactors; Xenon; Fuels; Uranium; Irradiation; Radioactive materials; Simulation; Diffusion; Grains DO - http://dx.doi.org/10.1016/j.jnucmat.2015.03.019 ER - TY - JOUR T1 - Molecular dynamics study of fission gas bubble nucleation in UO sub(2) AN - 1732840243; PQ0002249568 AB - Molecular dynamics (MD) simulations are used to study helium and xenon gas bubble nucleation in UO sub(2). For helium bubbles, the pressure release mechanism is by creating defects on the oxygen sublattice. Helium atoms diffuse away from the bubbles into nearby bulk UO sub(2), thus forming a diffuse interface. For xenon bubbles, over-pressurized bubbles containing xenon can displace uranium atoms, which tend to aggregate around the xenon bubble as a pressure release mechanism. MD simulations of xenon atoms in pre-existing voids suggest that xenon atoms and the replaced uranium atoms occur in a 1:1 ratio, although kinetic factors may reduce that ratio depending on availability of xenon atoms and vacancies around the bubble. Finally, MD simulations suggest that for small bubbles (1-5 xenon atoms), the xenon bubble nucleus at UO sub(2) grain-boundaries has much lower formation energy compared to that of bubbles of similar sizes in the bulk. However, when the xenon bubble grows into larger sizes, this energy difference is reduced. JF - Journal of Nuclear Materials AU - Liu, X-Y AU - Andersson, D A AD - Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, xyliu@lanl.gov PY - 2015 SP - 8 EP - 14 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 462 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Oxygen KW - Xenon KW - Energy KW - Uranium KW - Kinetics KW - Radioactive materials KW - Helium KW - Simulation KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732840243?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Molecular+dynamics+study+of+fission+gas+bubble+nucleation+in+UO+sub%282%29&rft.au=Liu%2C+X-Y%3BAndersson%2C+D+A&rft.aulast=Liu&rft.aufirst=X-Y&rft.date=2015-07-01&rft.volume=462&rft.issue=&rft.spage=8&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2015.03.030 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Number of references - 36 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Oxygen; Xenon; Kinetics; Uranium; Energy; Radioactive materials; Simulation; Helium DO - http://dx.doi.org/10.1016/j.jnucmat.2015.03.030 ER - TY - JOUR T1 - A numerical homogenization method for heterogeneous, anisotropic elastic media based on multiscale theory AN - 1722154536; 2015-098621 AB - The development of reliable methods for upscaling fine-scale models of elastic media has long been an important topic for rock physics and applied seismology. Several effective medium theories have been developed to provide elastic parameters for materials such as finely layered media or randomly oriented or aligned fractures. In such cases, the analytic solutions for upscaled properties can be used for accurate prediction of wave propagation. However, such theories cannot be applied directly to homogenize elastic media with more complex, arbitrary spatial heterogeneity. Therefore, we have proposed a numerical homogenization algorithm based on multiscale finite-element methods for simulating elastic wave propagation in heterogeneous, anisotropic elastic media. Specifically, our method used multiscale basis functions obtained from a local linear elasticity problem with appropriately defined boundary conditions. Homogenized, effective medium parameters were then computed using these basis functions, and the approach applied a numerical discretization that was similar to the rotated staggered-grid finite-difference scheme. Comparisons of the results from our method and from conventional, analytical approaches for finely layered media showed that the homogenization reliably estimated elastic parameters for this simple geometry. Additional tests examined anisotropic models with arbitrary spatial heterogeneity in which the average size of the heterogeneities ranged from several centimeters to several meters, and the ratio between the dominant wavelength and the average size of the arbitrary heterogeneities ranged from 10 to 100. Comparisons to finite-difference simulations proved that the numerical homogenization was equally accurate for these complex cases. JF - Geophysics AU - Gao, Kai AU - Chung, Eric T AU - Gibson, Richard L, Jr AU - Fu, Shubin AU - Efendiev, Yalchin Y1 - 2015/07// PY - 2015 DA - July 2015 SP - D385 EP - D401 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 80 IS - 4 SN - 0016-8033, 0016-8033 KW - scale factor KW - anisotropic materials KW - numerical models KW - multiscale theory KW - finite difference analysis KW - elastic properties KW - geophysical methods KW - data processing KW - mathematical models KW - elastic waves KW - equations KW - wave fields KW - seismic methods KW - visualization KW - finite element analysis KW - theoretical studies KW - heterogeneous materials KW - propagation KW - seismic waves KW - algorithms KW - accuracy KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722154536?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysics&rft.atitle=A+numerical+homogenization+method+for+heterogeneous%2C+anisotropic+elastic+media+based+on+multiscale+theory&rft.au=Gao%2C+Kai%3BChung%2C+Eric+T%3BGibson%2C+Richard+L%2C+Jr%3BFu%2C+Shubin%3BEfendiev%2C+Yalchin&rft.aulast=Gao&rft.aufirst=Kai&rft.date=2015-07-01&rft.volume=80&rft.issue=4&rft.spage=D385&rft.isbn=&rft.btitle=&rft.title=Geophysics&rft.issn=00168033&rft_id=info:doi/10.1190%2Fgeo2014-0363.1 L2 - http://library.seg.org/journal/gpysa7 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 51 N1 - PubXState - OK N1 - Document feature - illus. N1 - SuppNotes - Date issued: 25 Jun 2015; Includes appendices N1 - Last updated - 2015-10-15 N1 - CODEN - GPYSA7 N1 - SubjectsTermNotLitGenreText - accuracy; algorithms; anisotropic materials; data processing; elastic properties; elastic waves; equations; finite difference analysis; finite element analysis; geophysical methods; heterogeneous materials; mathematical models; multiscale theory; numerical models; propagation; scale factor; seismic methods; seismic waves; theoretical studies; visualization; wave fields DO - http://dx.doi.org/10.1190/geo2014-0363.1 ER - TY - JOUR T1 - Analytical sensitivity analysis of transient groundwater flow in a bounded model domain using the adjoint method AN - 1712778157; PQ0001915232 AB - Sensitivity analyses are an important component of any modeling exercise. We have developed an analytical methodology based on the adjoint method to compute sensitivities of a state variable (hydraulic head) to model parameters (hydraulic conductivity and storage coefficient) for transient groundwater flow in a confined and randomly heterogeneous aquifer under ambient and pumping conditions. For a special case of two-dimensional rectangular domains, these sensitivities are represented in terms of the problem configuration (the domain size, boundary configuration, medium properties, pumping schedules and rates, and observation locations and times), and there is no need to actually solve the adjoint equations. As an example, we present analyses of the obtained solution for typical groundwater flow conditions. Analytical solutions allow us to calculate sensitivities efficiently, which can be useful for model-based analyses such as parameter estimation, data-worth evaluation, and optimal experimental design related to sampling frequency and locations of observation wells. The analytical approach is not limited to groundwater applications but can be extended to any other mathematical problem with similar governing equations and under similar conceptual conditions. Key Points: * Analytic approach to compute transient sensitivities using the adjoint method * Model parameters include distributed transmissivity and storativity * Parameter fields can be correlated or uncorrelated JF - Water Resources Research AU - Lu, Zhiming AU - Vesselinov, Velimir V AD - Computational Earth Science Group (EES-16), MS T003, Los Alamos National Laboratory, Los Alamos, NM 87544, USA. Y1 - 2015/07// PY - 2015 DA - July 2015 SP - 5060 EP - 5080 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 51 IS - 7 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Hydraulic conductivity KW - Aquifers KW - Aquifer KW - Water resources KW - Sensitivity Analysis KW - Observation Wells KW - Ground water KW - Sampling KW - Pumping KW - Aquifer flow KW - Modelling KW - Mathematical models KW - Groundwater flow KW - Model Studies KW - Methodology KW - Sensitivity analysis KW - Analytical techniques KW - Geohydrology KW - Boundaries KW - Groundwater KW - Water resources research KW - Groundwater Movement KW - AQ 00001:Water Resources and Supplies KW - Q2 09403:Chemicals from sea water KW - M2 556.18:Water Management (556.18) KW - SW 6010:Structures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1712778157?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Analytical+sensitivity+analysis+of+transient+groundwater+flow+in+a+bounded+model+domain+using+the+adjoint+method&rft.au=Lu%2C+Zhiming%3BVesselinov%2C+Velimir+V&rft.aulast=Lu&rft.aufirst=Zhiming&rft.date=2015-07-01&rft.volume=51&rft.issue=7&rft.spage=5060&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2014WR016819 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Aquifer; Mathematical models; Analytical techniques; Ground water; Water resources; Pumping; Modelling; Methodology; Aquifers; Hydraulic conductivity; Sensitivity analysis; Groundwater flow; Aquifer flow; Water resources research; Sensitivity Analysis; Observation Wells; Boundaries; Geohydrology; Sampling; Groundwater; Groundwater Movement; Model Studies DO - http://dx.doi.org/10.1002/2014WR016819 ER - TY - JOUR T1 - On buoyancy driven mixing by volumetric microwave energy deposition AN - 1705064040; PQ0001745068 AB - Investigation of buoyancy driven mixing by volumetric energy deposition is of particular interest to inertial confinement fusion research. This contribution describes a new microwave facility and an experiment to study buoyancy driven mixing of miscible fluids by volumetric energy deposition. A light weakly-polar fluid initially rested on top of a heavier and higher polarity fluid. As the fluid system was subjected to microwave radiation, less microwave energy was deposited into the weakly-polar fluid than the higher polarity fluid: thus, the bottom fluid was preferentially heated, and its density decreased due to thermal expansion. With continued microwave heating, the density of the bottom fluid dropped below the density of the upper fluid, creating a Rayleigh-Taylor unstable configuration, and, subsequently, buoyancy driven mixing. The miscible pair of toluene and tetrahydrofuran was chosen for the volumetric energy deposition experiments presented. Initially, single fluid microwave heating experiments, for which the source term in the heat equation was varied by variations in the fluid volume, were performed to provide calibration of a mathematical model. The model provided a prediction of the neutral stability point of the system, which facilitated experimental design and understanding. Measurements of the mixing layer width from this two-fluid mixing experiment are compared with results from a self-similar analysis of the governing equations. JF - International Journal of Heat and Mass Transfer AU - Wachtor, A J AU - Mocko, V AU - Jebrail, F F AU - Andrews, M J AD - Los Alamos National Laboratory, Los Alamos, NM 87545, United States, ajw@lanl.gov Y1 - 2015/07// PY - 2015 DA - Jul 2015 SP - 443 EP - 454 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 86 SN - 0017-9310, 0017-9310 KW - Environment Abstracts KW - Microwaves KW - Mixing KW - Rayleigh-Taylor KW - Unstable stratification KW - Volumetric energy deposition KW - Prediction KW - Microwave radiation KW - Thermal expansion KW - Mathematical models KW - Energy KW - Toluene KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1705064040?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Heat+and+Mass+Transfer&rft.atitle=On+buoyancy+driven+mixing+by+volumetric+microwave+energy+deposition&rft.au=Wachtor%2C+A+J%3BMocko%2C+V%3BJebrail%2C+F+F%3BAndrews%2C+M+J&rft.aulast=Wachtor&rft.aufirst=A&rft.date=2015-07-01&rft.volume=86&rft.issue=&rft.spage=443&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Heat+and+Mass+Transfer&rft.issn=00179310&rft_id=info:doi/10.1016%2Fj.ijheatmasstransfer.2015.01.112 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Number of references - 29 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Prediction; Microwave radiation; Mathematical models; Thermal expansion; Toluene; Energy DO - http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.01.112 ER - TY - JOUR T1 - Rosetta comparative modeling for library design: Engineering alternative inducer specificity in a transcription factor AN - 1694980911; PQ0001665533 AB - Structure-based rational mutagenesis for engineering protein functionality has been limited by the scarcity and difficulty of obtaining crystal structures of desired proteins. On the other hand, when high-throughput selection is possible, directed evolution-based approaches for gaining protein functionalities have been random and fortuitous with limited rationalization. We combine comparative modeling of dimer structures, ab initio loop reconstruction, and ligand docking to select positions for mutagenesis to create a library focused on the ligand-contacting residues. The rationally reduced library requirement enabled conservative control of the substitutions by oligonucleotide synthesis and bounding its size within practical transformation efficiencies (10 super(7) variants). This rational approach was successfully applied on an inducer-binding domain of an Acinetobacter transcription factor (TF), pobR, which shows high specificity for natural effector molecule, 4-hydroxy benzoate (4HB), but no native response to 3,4-dihydroxy benzoate (34DHB). Selection for mutants with high transcriptional induction by 34DHB was carried out at the single-cell level under flow cytometry (via green fluorescent protein expression under the control of pobR promoter). Critically, this selection protocol allows both selection for induction and rejection of constitutively active mutants. In addition to gain-of-function for 34DHB induction, the selected mutants also showed enhanced sensitivity and response for 4HB (native inducer) while no sensitivity was observed for a non-targeted but chemically similar molecule, 2-hydroxy benzoate (2HB). This is unique application of the Rosetta modeling protocols for library design to engineer a TF. Our approach extends applicability of the Rosetta redesign protocol into regimes without a priori precision structural information. Proteins 2015; 83:1327-1340. JF - Proteins: Structure, Function and Bioinformatics AU - Jha, Ramesh K AU - Chakraborti, Subhendu AU - Kern, Theresa L AU - Fox, David T AU - Strauss, Charlie EM AD - Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545. Y1 - 2015/07// PY - 2015 DA - Jul 2015 SP - 1327 EP - 1340 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030 United States VL - 83 IS - 7 SN - 0887-3585, 0887-3585 KW - Biotechnology and Bioengineering Abstracts KW - Flow cytometry KW - Protein structure KW - Promoters KW - Acinetobacter KW - Benzoic acid KW - Transcription factors KW - Crystal structure KW - Green fluorescent protein KW - Bioinformatics KW - Oligonucleotides KW - Mutagenesis KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1694980911?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proteins%3A+Structure%2C+Function+and+Bioinformatics&rft.atitle=Rosetta+comparative+modeling+for+library+design%3A+Engineering+alternative+inducer+specificity+in+a+transcription+factor&rft.au=Jha%2C+Ramesh+K%3BChakraborti%2C+Subhendu%3BKern%2C+Theresa+L%3BFox%2C+David+T%3BStrauss%2C+Charlie+EM&rft.aulast=Jha&rft.aufirst=Ramesh&rft.date=2015-07-01&rft.volume=83&rft.issue=7&rft.spage=1327&rft.isbn=&rft.btitle=&rft.title=Proteins%3A+Structure%2C+Function+and+Bioinformatics&rft.issn=08873585&rft_id=info:doi/10.1002%2Fprot.24828 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Protein structure; Flow cytometry; Promoters; Benzoic acid; Transcription factors; Green fluorescent protein; Crystal structure; Bioinformatics; Oligonucleotides; Mutagenesis; Acinetobacter DO - http://dx.doi.org/10.1002/prot.24828 ER - TY - JOUR T1 - Thermal green protein, an extremely stable, nonaggregating fluorescent protein created by structure-guided surface engineering AN - 1694976244; PQ0001665523 AB - In this article, we describe the engineering and X-ray crystal structure of Thermal Green Protein (TGP), an extremely stable, highly soluble, non-aggregating green fluorescent protein. TGP is a soluble variant of the fluorescent protein eCGP123, which despite being highly stable, has proven to be aggregation-prone. The X-ray crystal structure of eCGP123, also determined within the context of this paper, was used to carry out rational surface engineering to improve its solubility, leading to TGP. The approach involved simultaneously eliminating crystal lattice contacts while increasing the overall negative charge of the protein. Despite intentional disruption of lattice contacts and introduction of high entropy glutamate side chains, TGP crystallized readily in a number of different conditions and the X-ray crystal structure of TGP was determined to 1.9 Aa resolution. The structural reasons for the enhanced stability of TGP and eCGP123 are discussed. We demonstrate the utility of using TGP as a fusion partner in various assays and significantly, in amyloid assays in which the standard fluorescent protein, EGFP, is undesirable because of aberrant oligomerization. Proteins 2015; 83:1225-1237. JF - Proteins: Structure, Function and Bioinformatics AU - Close, Devin W AU - Paul, Craig Don AU - Langan, Patricia S AU - Wilce, Matthew CJ AU - Traore, Daouda AK AU - Halfmann, Randal AU - Rocha, Reginaldo C AU - Waldo, Geoffery S AU - Payne, Riley J AU - Rucker, Joseph B AU - Prescott, Mark AU - Bradbury, Andrew RM AD - Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico. Y1 - 2015/07// PY - 2015 DA - Jul 2015 SP - 1225 EP - 1237 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030 United States VL - 83 IS - 7 SN - 0887-3585, 0887-3585 KW - Biotechnology and Bioengineering Abstracts KW - Protein structure KW - Solubility KW - Ionizing radiation KW - Oligomerization KW - Crystal structure KW - Green fluorescent protein KW - Bioinformatics KW - Glutamic acid KW - Entropy KW - Amyloid KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1694976244?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proteins%3A+Structure%2C+Function+and+Bioinformatics&rft.atitle=Thermal+green+protein%2C+an+extremely+stable%2C+nonaggregating+fluorescent+protein+created+by+structure-guided+surface+engineering&rft.au=Close%2C+Devin+W%3BPaul%2C+Craig+Don%3BLangan%2C+Patricia+S%3BWilce%2C+Matthew+CJ%3BTraore%2C+Daouda+AK%3BHalfmann%2C+Randal%3BRocha%2C+Reginaldo+C%3BWaldo%2C+Geoffery+S%3BPayne%2C+Riley+J%3BRucker%2C+Joseph+B%3BPrescott%2C+Mark%3BBradbury%2C+Andrew+RM&rft.aulast=Close&rft.aufirst=Devin&rft.date=2015-07-01&rft.volume=83&rft.issue=7&rft.spage=1225&rft.isbn=&rft.btitle=&rft.title=Proteins%3A+Structure%2C+Function+and+Bioinformatics&rft.issn=08873585&rft_id=info:doi/10.1002%2Fprot.24699 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Protein structure; Solubility; Ionizing radiation; Oligomerization; Green fluorescent protein; Crystal structure; Glutamic acid; Bioinformatics; Entropy; Amyloid DO - http://dx.doi.org/10.1002/prot.24699 ER - TY - CPAPER T1 - Improving Photosynthetic Efficiency and Biomass Yields in Plants and Algae T2 - 2015 Annual Main Meeting of the Society for Experimental Biology (SEB 2015) AN - 1697992046; 6351859 JF - 2015 Annual Main Meeting of the Society for Experimental Biology (SEB 2015) AU - Sayre, Richard Y1 - 2015/06/30/ PY - 2015 DA - 2015 Jun 30 KW - Photosynthesis KW - Biomass KW - Algae UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1697992046?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2015+Annual+Main+Meeting+of+the+Society+for+Experimental+Biology+%28SEB+2015%29&rft.atitle=Improving+Photosynthetic+Efficiency+and+Biomass+Yields+in+Plants+and+Algae&rft.au=Sayre%2C+Richard&rft.aulast=Sayre&rft.aufirst=Richard&rft.date=2015-06-30&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2015+Annual+Main+Meeting+of+the+Society+for+Experimental+Biology+%28SEB+2015%29&rft.issn=&rft_id=info:doi/ L2 - http://www.sebiology.org/meetings/Prague/programmes.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-06-30 N1 - Last updated - 2015-07-23 ER - TY - JOUR T1 - Light-Driven and Phonon-Assisted Dynamics in Organic and Semiconductor Nanostructures. AN - 1691287548; 25993511 JF - Chemical reviews AU - Kilina, Svetlana AU - Kilin, Dmitri AU - Tretiak, Sergei AD - †Chemistry and Biochemistry Department, North Dakota State University, Fargo, North Dakota 5810, United States. ; ‡Department of Chemistry, University of South Dakota, Vermillion, South Dakota 57069, United States. ; §Theoretical Division, Center for Nonlinear Studies (CNLS) and Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States. Y1 - 2015/06/24/ PY - 2015 DA - 2015 Jun 24 SP - 5929 EP - 5978 VL - 115 IS - 12 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1691287548?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+reviews&rft.atitle=Light-Driven+and+Phonon-Assisted+Dynamics+in+Organic+and+Semiconductor+Nanostructures.&rft.au=Kilina%2C+Svetlana%3BKilin%2C+Dmitri%3BTretiak%2C+Sergei&rft.aulast=Kilina&rft.aufirst=Svetlana&rft.date=2015-06-24&rft.volume=115&rft.issue=12&rft.spage=5929&rft.isbn=&rft.btitle=&rft.title=Chemical+reviews&rft.issn=1520-6890&rft_id=info:doi/10.1021%2Facs.chemrev.5b00012 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-08-26 N1 - Date created - 2015-06-24 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acs.chemrev.5b00012 ER - TY - JOUR T1 - Ridge-push force and the state of stress in the Nubia-Somalia Plate system AN - 1703690157; 2015-078835 AB - We assessed the relative contribution of ridge-push forces to the stress state of the Nubia-Somalia plate system by comparing ridge-push forces with lithospheric strength in the oceanic part of the plate, based on estimates from plate cooling and rheological models. The ridge-push forces were derived from the thermal state of the oceanic lithosphere, seafloor depth, and crustal age data. The results of the comparison show that the magnitude of the ridge-push forces is less than the integrated strength of the oceanic part of the plate. This implies that the oceanic part of the plate is very little deformed; thus, the ridge-push forces may be compensated by significant strain rates outside the oceanic parts of the plate. We used an elastic finite element analysis of geoid gradients of the upper mantle to evaluate stresses associated with the gravitational potential energy of the surrounding ridges and show that these stresses may be transmitted through the oceanic part of the plate, with little modulation in magnitude, before reaching the continental regions. We therefore conclude that the present-day stress fields in continental Africa can be viewed as the product of the gravitational potential energy of the ridge ensemble surrounding the plate in conjunction with lateral variations in lithospheric structure within the continent regions. JF - Lithosphere AU - Mahatsente, Rezene AU - Coblentz, David Y1 - 2015/06/09/ PY - 2015 DA - 2015 Jun 09 SP - 503 EP - 510 PB - Geological Society of America, Boulder, CO VL - 7 IS - 5 SN - 1941-8264, 1941-8264 KW - oceanic crust KW - upper mantle KW - lithosphere KW - stress KW - oceanic lithosphere KW - mantle KW - stress fields KW - geodesy KW - Nubia-Somalia Plate KW - finite element analysis KW - ridge-push force KW - plate tectonics KW - Indian Ocean KW - heat flow KW - Africa KW - geoid KW - crust KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703690157?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Lithosphere&rft.atitle=Ridge-push+force+and+the+state+of+stress+in+the+Nubia-Somalia+Plate+system&rft.au=Mahatsente%2C+Rezene%3BCoblentz%2C+David&rft.aulast=Mahatsente&rft.aufirst=Rezene&rft.date=2015-06-09&rft.volume=7&rft.issue=5&rft.spage=503&rft.isbn=&rft.btitle=&rft.title=Lithosphere&rft.issn=19418264&rft_id=info:doi/10.1130%2FL441.1 L2 - http://lithosphere.gsapubs.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 67 N1 - PubXState - CO N1 - Document feature - illus. incl. 2 tables, geol. sketch maps N1 - Last updated - 2015-10-15 N1 - SubjectsTermNotLitGenreText - Africa; crust; finite element analysis; geodesy; geoid; heat flow; Indian Ocean; lithosphere; mantle; Nubia-Somalia Plate; oceanic crust; oceanic lithosphere; plate tectonics; ridge-push force; stress; stress fields; upper mantle DO - http://dx.doi.org/10.1130/L441.1 ER - TY - JOUR T1 - Casimir physics. AN - 1680955179; 25965028 JF - Journal of physics. Condensed matter : an Institute of Physics journal AU - Palasantzas, George AU - Dalvit, Diego A R AU - Decca, Ricardo AU - Svetovoy, Vitaly B AU - Lambrecht, Astrid AD - Surface Interactions and Nanostructures, Zernike Institute for Advanced Materials, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands. Theoretical Division, MS B213, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Department of Physics, IUPUI, 402 N Blackford St, Bldg LD154, Indianapolis, IN 46202, USA. MESA+ Institute for Nanotechnology, University of Twente, PO 217, 7500 AE Enschede, The Netherlands. Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, Collège de France, 4, place Jussieu Case 74, 75252 Paris Cedex 05, France. Y1 - 2015/06/03/ PY - 2015 DA - 2015 Jun 03 SP - 210301 VL - 27 IS - 21 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680955179?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+physics.+Condensed+matter+%3A+an+Institute+of+Physics+journal&rft.atitle=Casimir+physics.&rft.au=Palasantzas%2C+George%3BDalvit%2C+Diego+A+R%3BDecca%2C+Ricardo%3BSvetovoy%2C+Vitaly+B%3BLambrecht%2C+Astrid&rft.aulast=Palasantzas&rft.aufirst=George&rft.date=2015-06-03&rft.volume=27&rft.issue=21&rft.spage=210301&rft.isbn=&rft.btitle=&rft.title=Journal+of+physics.+Condensed+matter+%3A+an+Institute+of+Physics+journal&rft.issn=1361-648X&rft_id=info:doi/10.1088%2F0953-8984%2F27%2F21%2F210301 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-02-02 N1 - Date created - 2015-05-13 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1088/0953-8984/27/21/210301 ER - TY - JOUR T1 - Reactive transport codes for subsurface environmental simulation AN - 1832643177; 756301-3 AB - A general description of the mathematical and numerical formulations used in modern numerical reactive transport codes relevant for subsurface environmental simulations is presented. The formulations are followed by short descriptions of commonly used and available subsurface simulators that consider continuum representations of flow, transport, and reactions in porous media. These formulations are applicable to most of the subsurface environmental benchmark problems included in this special issue. The list of codes described briefly here includes PHREEQC, HPx, PHT3D, OpenGeoSys (OGS), HYTEC, ORCHESTRA, TOUGHREACT, eSTOMP, HYDROGEOCHEM, CrunchFlow, MIN3P, and PFLOTRAN. The descriptions include a high-level list of capabilities for each of the codes, along with a selective list of applications that highlight their capabilities and historical development. Copyright 2015 Springer International Publishing Switzerland and 2014 The Author(s) JF - Computational Geosciences AU - Steefel, C I AU - Appelo, C A J AU - Arora, B AU - Jacques, D AU - Kalbacher, T AU - Kolditz, O AU - Lagneau, V AU - Lichtner, P C AU - Mayer, K U AU - Meeussen, J C L AU - Molins, S AU - Moulton, D AU - Shao, H AU - Sim&U+016F;nek, J AU - Spycher, N AU - Yabusaki, S B AU - Yeh, G T Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 445 EP - 478 PB - Springer, Dordrecht VL - 19 IS - 3 SN - 1420-0597, 1420-0597 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832643177?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computational+Geosciences&rft.atitle=Reactive+transport+codes+for+subsurface+environmental+simulation&rft.au=Steefel%2C+C+I%3BAppelo%2C+C+A+J%3BArora%2C+B%3BJacques%2C+D%3BKalbacher%2C+T%3BKolditz%2C+O%3BLagneau%2C+V%3BLichtner%2C+P+C%3BMayer%2C+K+U%3BMeeussen%2C+J+C+L%3BMolins%2C+S%3BMoulton%2C+D%3BShao%2C+H%3BSim%26amp%3BU%2B016F%3Bnek%2C+J%3BSpycher%2C+N%3BYabusaki%2C+S+B%3BYeh%2C+G+T&rft.aulast=Steefel&rft.aufirst=C&rft.date=2015-06-01&rft.volume=19&rft.issue=3&rft.spage=445&rft.isbn=&rft.btitle=&rft.title=Computational+Geosciences&rft.issn=14200597&rft_id=info:doi/10.1007%2Fs10596-014-9443-x L2 - http://www.springerlink.com/content/101744/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1007/s10596-014-9443-x ER - TY - JOUR T1 - A note on upscaling retardation factor in hierarchical porous media with multimodal reactive mineral facies AN - 1803774093; 2016-059695 AB - We present a model for upscaling the time-dependent effective retardation factor, , R(t) in hierarchical porous media with multimodal reactive mineral facies. The model extends the approach by Deng et al. (Chemosphere 91(3):248-257, 2013) in which they expanded a Lagrangian-based stochastic theory presented by Rajaram (Adv Water Resour 20(4):217-230, 1997) in order to describe the scaling effect of R(t). They used a first-order linear approximation in deriving their model to make the derivation tractable. Importantly, the linear approximation is known to be valid only to variances of 0.2. In this note, we show that the model can be derived with a higher-order approximation, which allows for representing variances from 0.2 to 1.0. We present the derivation and use the resulting model to recalculate R(t) for the scenario examined by Deng et al. (2013). Copyright 2015 Springer Science+Business Media Dordrecht JF - Transport in Porous Media AU - Soltanian, Mohamad Reza AU - Ritzi, Robert AU - Huang, Chao Cheng AU - Dai, Zhenxue AU - Deng, Hailin Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 355 EP - 366 PB - Springer, Dordrecht VL - 108 IS - 2 SN - 0169-3913, 0169-3913 KW - solute transport KW - bulk density KW - fluid flow KW - porous materials KW - mathematical models KW - porosity KW - ground water KW - models KW - reactivity KW - transport KW - retardation factor KW - reactive transport KW - upscaling KW - mineral surface KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803774093?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transport+in+Porous+Media&rft.atitle=A+note+on+upscaling+retardation+factor+in+hierarchical+porous+media+with+multimodal+reactive+mineral+facies&rft.au=Soltanian%2C+Mohamad+Reza%3BRitzi%2C+Robert%3BHuang%2C+Chao+Cheng%3BDai%2C+Zhenxue%3BDeng%2C+Hailin&rft.aulast=Soltanian&rft.aufirst=Mohamad&rft.date=2015-06-01&rft.volume=108&rft.issue=2&rft.spage=355&rft.isbn=&rft.btitle=&rft.title=Transport+in+Porous+Media&rft.issn=01693913&rft_id=info:doi/10.1007%2Fs11242-015-0480-2 L2 - http://springerlink.metapress.com/(l4tqdq55jga2hgb0achos1qm)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100342,1 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 19 N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2016-07-14 N1 - SubjectsTermNotLitGenreText - bulk density; fluid flow; ground water; mathematical models; mineral surface; models; porosity; porous materials; reactive transport; reactivity; retardation factor; solute transport; transport; upscaling DO - http://dx.doi.org/10.1007/s11242-015-0480-2 ER - TY - JOUR T1 - Correction: Structural vs.intrinsic carriers: contrasting effects of cation chemistry and disorder on ionic conductivity in pyrochlores AN - 1732818659; PQ0002145216 AB - Correction for 'Structural vs.intrinsic carriers: contrasting effects of cation chemistry and disorder on ionic conductivity in pyrochlores' by Romain Perriot et al., J. Mater. Chem. A, 2015, DOI: 10.1039/c5ta01692d. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Perriot, Romain AU - Uberuaga, Blas P AD - Materials Science and Technology Division; Los Alamos National Laboratory; Los Alamos 87545; USA; , rperriot@lanl.gov Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 12557 PB - Royal Society of Chemistry VL - 3 IS - 23 SN - 2050-7488, 2050-7488 KW - Sustainability Science Abstracts KW - Cations KW - Energy KW - Sustainability KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732818659?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.atitle=Correction%3A+Structural+vs.intrinsic+carriers%3A+contrasting+effects+of+cation+chemistry+and+disorder+on+ionic+conductivity+in+pyrochlores&rft.au=Perriot%2C+Romain%3BUberuaga%2C+Blas+P&rft.aulast=Perriot&rft.aufirst=Romain&rft.date=2015-06-01&rft.volume=3&rft.issue=23&rft.spage=12557&rft.isbn=&rft.btitle=&rft.title=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.issn=20507488&rft_id=info:doi/10.1039%2Fc5ta90115d LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Cations; Energy; Sustainability DO - http://dx.doi.org/10.1039/c5ta90115d ER - TY - JOUR T1 - Precise relative earthquake magnitudes from cross correlation AN - 1707522357; 2015-081939 AB - We present a method to estimate precise relative magnitudes using cross correlation of seismic waveforms. Our method incorporates the intercorrelation of all events in a group of earthquakes, as opposed to individual event pairings relative to a reference event. This method works well when a reliable reference event does not exist. We illustrate the method using vertical strike-slip earthquakes located in the northeast Pacific and Panama fracture zone regions. Our results are generally consistent with the Global Centroid Moment Tensor catalog, which we use to establish a baseline for the relative event sizes.Online Material: Supplementary description and formulation of uncertainty, and tables of relative magnitudes. JF - Bulletin of the Seismological Society of America AU - Cleveland, K Michael AU - Ammon, Charles J Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 1792 EP - 1796 PB - Seismological Society of America, Berkeley, CA VL - 105 IS - 3 SN - 0037-1106, 0037-1106 KW - seismograms KW - Panama KW - East Pacific KW - Northeast Pacific KW - Juan de Fuca Plate KW - statistical analysis KW - magnitude KW - waveforms KW - strike-slip faults KW - plate tectonics KW - moment tensors KW - North Pacific KW - crosscorrelation KW - Pacific Ocean KW - Panama fracture zone KW - Pacific Plate KW - algorithms KW - earthquakes KW - Central America KW - accuracy KW - faults KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707522357?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Precise+relative+earthquake+magnitudes+from+cross+correlation&rft.au=Cleveland%2C+K+Michael%3BAmmon%2C+Charles+J&rft.aulast=Cleveland&rft.aufirst=K&rft.date=2015-06-01&rft.volume=105&rft.issue=3&rft.spage=1792&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120140329 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 10 N1 - PubXState - CA N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2015-08-27 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - accuracy; algorithms; Central America; crosscorrelation; earthquakes; East Pacific; faults; Juan de Fuca Plate; magnitude; moment tensors; North Pacific; Northeast Pacific; Pacific Ocean; Pacific Plate; Panama; Panama fracture zone; plate tectonics; seismograms; statistical analysis; strike-slip faults; waveforms DO - http://dx.doi.org/10.1785/0120140329 ER - TY - JOUR T1 - Pore-scale simulation of multicomponent multiphase reactive transport with dissolution and precipitation AN - 1705064759; PQ0001758815 AB - Multicomponent multiphase reactive transport processes with dissolution-precipitation are widely encountered in energy and environment systems. A pore-scale two-phase multi-mixture model based on the lattice Boltzmann method (LBM) is developed for such complex transport processes, where each phase is considered as a mixture of miscible components in it. The liquid-gas fluid flow with large density ratio is simulated using the multicomponent multiphase pseudo-potential LB model; the transport of certain solute in the corresponding solvent is solved using the mass transport LB model; and the dynamic evolutions of the liquid-solid interface due to dissolution-precipitation are captured by an interface tracking scheme. The model developed can predict coupled multiple physicochemical processes including multiphase flow, multicomponent mass transport, homogeneous reactions in the bulk fluid and heterogeneous dissolution-precipitation reactions at the fluid-solid interface, and dynamic evolution of the solid matrix geometries at the pore-scale. The model is then applied to a physicochemical system encountered in shale gas/oil industry involving multiphase flow, multicomponent reactive transport and dissolution-precipitation, with several reactions whose rates can be several orders of magnitude different at a given temperature. The pore-scale phenomena and complex interaction between different sub-processes are investigated and discussed in detail. JF - International Journal of Heat and Mass Transfer AU - Chen, Li AU - Kang, Qinjun AU - Tang, Qing AU - Robinson, Bruce A AU - He, Ya-Ling AU - Tao, Wen-Quan AD - Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; Computational Earth Science Croup (EES-16), Los Alamos National Laboratory, Los Alamos, NM, USA, qkang@lanl.gov Y1 - 2015/06// PY - 2015 DA - Jun 2015 SP - 935 EP - 949 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 85 SN - 0017-9310, 0017-9310 KW - Environment Abstracts KW - Multicomponent multiphase flow KW - Dissolution-precipitation KW - Reactive transport KW - Pore-scale KW - Lattice Boltzmann method KW - Oil KW - Energy KW - Physicochemical properties KW - Temperature KW - Solvents KW - Simulation KW - Mass transport KW - Transport processes KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1705064759?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Heat+and+Mass+Transfer&rft.atitle=Pore-scale+simulation+of+multicomponent+multiphase+reactive+transport+with+dissolution+and+precipitation&rft.au=Chen%2C+Li%3BKang%2C+Qinjun%3BTang%2C+Qing%3BRobinson%2C+Bruce+A%3BHe%2C+Ya-Ling%3BTao%2C+Wen-Quan&rft.aulast=Chen&rft.aufirst=Li&rft.date=2015-06-01&rft.volume=85&rft.issue=&rft.spage=935&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Heat+and+Mass+Transfer&rft.issn=00179310&rft_id=info:doi/10.1016%2Fj.ijheatmasstransfer.2015.02.035 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Number of references - 47 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Oil; Energy; Physicochemical properties; Solvents; Temperature; Simulation; Transport processes; Mass transport DO - http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.02.035 ER - TY - JOUR T1 - Isotopic identification of soil and permafrost nitrate sources in an Arctic tundra ecosystem AN - 1701486811; PQ0001761873 AB - The nitrate (NO sub(3) super(-)) dual isotope approach was applied to snowmelt, tundra active layer pore waters, and underlying permafrost in Barrow, Alaska, USA, to distinguish between NO sub(3) super(-) derived from atmospheric deposition versus that derived from microbial nitrification. Snowmelt had an atmospheric NO sub(3) super(-) signal with delta super(15)N averaging -4.8 plus or minus 1.0ppt (standard error of the mean) and delta super(18)O averaging 70.2 plus or minus 1.7ppt. In active layer pore waters, NO sub(3) super(-) primarily occurred at concentrations suitable for isotopic analysis in the relatively dry and oxic centers of high-centered polygons. The average delta super(15)N and delta super(18)O of NO sub(3) super(-) from high-centered polygons were 0.5 plus or minus 1.1ppt and -4.1 plus or minus 0.6ppt, respectively. When compared to the delta super(15)N of reduced nitrogen (N) sources, and the delta super(18)O of soil pore waters, it was evident that NO sub(3) super(-) in high-centered polygons was primarily from microbial nitrification. Permafrost NO sub(3) super(-) had delta super(15)N ranging from approximately -6ppt to 10ppt, similar to atmospheric and microbial NO sub(3) super(-), and highly variable delta super(18)O ranging from approximately -2ppt to 38ppt. Permafrost ice wedges contained a significant atmospheric component of NO sub(3) super(-), while permafrost textural ice contained a greater proportion of microbially derived NO sub(3) super(-). Large-scale permafrost thaw in this environment would release NO sub(3) super(-) with a delta super(18)O signature intermediate to that of atmospheric and microbial NO sub(3). Consequently, while atmospheric and microbial sources can be readily distinguished by the NO sub(3) super(-) dual isotope technique in tundra environments, attribution of NO sub(3) super(-) from thawing permafrost will not be straightforward. The NO sub(3) super(-) isotopic signature, however, appears useful in identifying NO sub(3) super(-) sources in extant permafrost ice. Key Points * Nitrate isotopes indicate microbial nitrate in high-centered polygons * No clear primary isotopic signal of atmospheric nitrate in active layer soils * Permafrost nitrate isotopes intermediate to microbial and atmospheric nitrate JF - Journal of Geophysical Research. G. Biogeosciences AU - Heikoop, Jeffrey M AU - Throckmorton, Heather M AU - Newman, Brent D AU - Perkins, George B AU - Iversen, Colleen M AU - Roy Chowdhury, Taniya AU - Romanovsky, Vladimir AU - Graham, David E AU - Norby, Richard J AU - Wilson, Cathy J AU - Wullschleger, Stan D AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 1000 EP - 1017 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 120 IS - 6 SN - 2169-8953, 2169-8953 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Ecology Abstracts KW - Nitrate KW - Pore water KW - Isotopes KW - Permafrost KW - Thawing KW - Soil KW - Tundra KW - Soils KW - PNW, USA, Alaska, Barrow KW - Ice KW - Nitrates KW - Interstitial Water KW - PN, Arctic KW - Nitrification KW - Microorganisms KW - Snowmelt KW - Oxygen isotope ratio KW - Nitrogen isotopes KW - Nitrogen KW - Q2 09262:Methods and instruments KW - SW 0810:General KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701486811?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research.+G.+Biogeosciences&rft.atitle=Isotopic+identification+of+soil+and+permafrost+nitrate+sources+in+an+Arctic+tundra+ecosystem&rft.au=Heikoop%2C+Jeffrey+M%3BThrockmorton%2C+Heather+M%3BNewman%2C+Brent+D%3BPerkins%2C+George+B%3BIversen%2C+Colleen+M%3BRoy+Chowdhury%2C+Taniya%3BRomanovsky%2C+Vladimir%3BGraham%2C+David+E%3BNorby%2C+Richard+J%3BWilson%2C+Cathy+J%3BWullschleger%2C+Stan+D&rft.aulast=Heikoop&rft.aufirst=Jeffrey&rft.date=2015-06-01&rft.volume=120&rft.issue=6&rft.spage=1000&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research.+G.+Biogeosciences&rft.issn=21698953&rft_id=info:doi/10.1002%2F2014JG002883 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Nitrates; Nitrification; Soils; Permafrost; Nitrogen isotopes; Oxygen isotope ratio; Thawing; Soil; Pore water; Ice; Nitrate; Isotopes; Tundra; Nitrogen; Snowmelt; Microorganisms; Interstitial Water; PN, Arctic; PNW, USA, Alaska, Barrow DO - http://dx.doi.org/10.1002/2014JG002883 ER - TY - JOUR T1 - Jumpstarting commercial-scale CO sub(2) capture and storage with ethylene production and enhanced oil recovery in the US Gulf AN - 1701479386; PQ0001722599 AB - CO sub(2) capture, utilization, and storage (CCUS) technology has yet to be widely deployed at a commercial scale despite multiple high-profile demonstration projects. We suggest that developing a large-scale, visible, and financially viable CCUS network could potentially overcome many barriers to deployment and jumpstart commercial-scale CCUS. To date, substantial effort has focused on technology development to reduce the costs of CO sub(2) capture from coal-fired power plants. Here, we propose that near-term investment could focus on implementing CO sub(2) capture on facilities that produce high-value chemicals/products. These facilities can absorb the expected impact of the marginal increase in the cost of production on the price of their product, due to the addition of CO sub(2) capture, more than coal-fired power plants. A financially viable demonstration of a large-scale CCUS network requires offsetting the costs of CO sub(2) capture by using the CO sub(2) as an input to the production of market-viable products. We demonstrate this alternative development path with the example of an integrated CCUS system where CO sub(2) is captured from ethylene producers and used for enhanced oil recovery in the US Gulf Coast region. [copy 2015 Society of Chemical Industry and John Wiley & Sons, Ltd JF - Greenhouse Gases: Science and Technology AU - Middleton, Richard S AU - Levine, Jonathan S AU - Bielicki, Jeffrey M AU - Viswanathan, Hari S AU - Carey, JWilliam AU - Stauffer, Philip H AD - Los Alamos National Laboratory, NM, USA. Y1 - 2015/06// PY - 2015 DA - Jun 2015 SP - 241 EP - 253 PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 5 IS - 3 SN - 2152-3878, 2152-3878 KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts KW - Chemicals KW - Coal combustion KW - Coal KW - Chemical industry KW - Storage KW - Coastal zone KW - Power plants KW - Oil recovery KW - Carbon dioxide KW - Greenhouse gases KW - Science and technology KW - Technology KW - ENA 12:Oceans & Estuaries KW - M2 551.510.3/.4:Physical Properties/Composition (551.510.3/.4) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701479386?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Greenhouse+Gases%3A+Science+and+Technology&rft.atitle=Jumpstarting+commercial-scale+CO+sub%282%29+capture+and+storage+with+ethylene+production+and+enhanced+oil+recovery+in+the+US+Gulf&rft.au=Middleton%2C+Richard+S%3BLevine%2C+Jonathan+S%3BBielicki%2C+Jeffrey+M%3BViswanathan%2C+Hari+S%3BCarey%2C+JWilliam%3BStauffer%2C+Philip+H&rft.aulast=Middleton&rft.aufirst=Richard&rft.date=2015-06-01&rft.volume=5&rft.issue=3&rft.spage=241&rft.isbn=&rft.btitle=&rft.title=Greenhouse+Gases%3A+Science+and+Technology&rft.issn=21523878&rft_id=info:doi/10.1002%2Fghg.1490 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Coal combustion; Greenhouse gases; Science and technology; Chemicals; Storage; Coastal zone; Power plants; Oil recovery; Coal; Carbon dioxide; Chemical industry; Technology DO - http://dx.doi.org/10.1002/ghg.1490 ER - TY - JOUR T1 - Measuring diurnal cycles of evapotranspiration in the Arctic with an automated chamber system AN - 1701478986; PQ0001722365 AB - Properly quantifying evapotranspiration (ET) is a critical step in determining water and energy balances, especially in Arctic landscapes where spatial and temporal heterogeneity in soil water content and inundation is pronounced. Although the eddy covariance technique has gained popularity as an approach for estimating ET at aggregate scales, obtaining ET estimates at finer spatial scales remains problematic. Thus, ET is poorly estimated for highly variable tundra landscapes, despite the importance of this process for parameterization and validation of models. To overcome this methodological limitation, we developed an approach to measure diurnal ET by modifying a LI-8100A (LI-COR, Lincoln, NE, USA), a chamber-based instrument typically used for measuring soil CO sub(2) fluxes. To enable the use of the LI-8100A for ET determinations, a calibration method was designed and implemented through laboratory and independent field measurements in Arctic and semi-arid locations. Once calibrated, the instrument was deployed June-September 2013 for diel measurements of ET on the Arctic coastal plain near Barrow, Alaska, USA. We validated the system by comparison to four adjacent plots measured by a LI-6400-09 soil CO sub(2) flux system that was also calibrated to calculate water vapour flux. In conclusion, we determined that with calibration, the LI-8100A can make long-term, high-frequency measurements of ET, even in low flux, continuous-permafrost landscapes. This technique provides an opportunity to assess fine-scale ET and its topographic controls across low-centre and high-centre polygons and to rigorously compare such measurements with aggregate fluxes obtained with eddy covariance. JF - Ecohydrology AU - Cohen, Lily R AU - Raz-Yaseef, Naama AU - Curtis, JBryan AU - Young, Jessica M AU - Rahn, Thom A AU - Wilson, Cathy J AU - Wullschleger, Stan D AU - Newman, Brent D AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA. Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 652 EP - 659 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 8 IS - 4 SN - 1936-0584, 1936-0584 KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts; Environment Abstracts KW - Coastal Plains KW - Spatial distribution KW - Water vapour KW - USA, Alaska, Arctic Coastal Plain KW - Measuring instruments KW - Soil KW - Calibrations KW - Tundra KW - Arctic KW - Heterogeneity KW - PNW, USA, Alaska, Barrow KW - Diurnal variations KW - Landscape KW - Oceanic eddies KW - Evapotranspiration KW - Polar environments KW - Water content KW - Aggregates KW - PN, Arctic KW - Eddies KW - Semiarid environments KW - Energy KW - Carbon dioxide KW - Fluctuations KW - Carbon Dioxide KW - Q2 09243:Structure, mechanics and thermodynamics KW - Q5 08503:Characteristics, behavior and fate KW - AQ 00006:Sewage KW - SW 0810:General KW - ENA 12:Oceans & Estuaries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701478986?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ecohydrology&rft.atitle=Measuring+diurnal+cycles+of+evapotranspiration+in+the+Arctic+with+an+automated+chamber+system&rft.au=Cohen%2C+Lily+R%3BRaz-Yaseef%2C+Naama%3BCurtis%2C+JBryan%3BYoung%2C+Jessica+M%3BRahn%2C+Thom+A%3BWilson%2C+Cathy+J%3BWullschleger%2C+Stan+D%3BNewman%2C+Brent+D&rft.aulast=Cohen&rft.aufirst=Lily&rft.date=2015-06-01&rft.volume=8&rft.issue=4&rft.spage=652&rft.isbn=&rft.btitle=&rft.title=Ecohydrology&rft.issn=19360584&rft_id=info:doi/10.1002%2Feco.1532 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Water vapour; Evapotranspiration; Oceanic eddies; Carbon dioxide; Soil; Diurnal variations; Spatial distribution; Semiarid environments; Tundra; Energy; Landscape; Measuring instruments; Water content; Polar environments; Eddies; Coastal Plains; Calibrations; Heterogeneity; Fluctuations; Arctic; Aggregates; Carbon Dioxide; PN, Arctic; PNW, USA, Alaska, Barrow; USA, Alaska, Arctic Coastal Plain DO - http://dx.doi.org/10.1002/eco.1532 ER - TY - JOUR T1 - Effect of quartz overgrowth precipitation on the multiscale porosity of sandstone; a (U)SANS and imaging analysis AN - 1696873163; 2015-069875 AB - We have performed a series of experiments to understand the effects of quartz overgrowths on nanometer to centimeter scale pore structures of sandstones. Blocks from two samples of St. Peter Sandstone with different initial porosities (5.8% and 18.3%) were reacted from 3 days to 7.5 months at 100 and 200 degrees C in aqueous solutions supersaturated with respect to quartz by reaction with amorphous silica. Porosity in the resultant samples was analyzed using small and ultrasmall angle neutron scattering and scanning electron microscope/backscattered electron (SEM/BSE)-based image-scale processing techniques. Significant changes were observed in the multiscale pore structures. By 3 days much of the overgrowth in the low-porosity sample dissolved away. The reason for this is uncertain, but the overgrowths can be clearly distinguished from the original core grains in the BSE images. At longer times the larger pores are observed to fill with plate-like precipitates. As with the unreacted sandstones, porosity is a step function of size. Grain boundaries are typically fractal, but no evidence of mass fractal or fuzzy interface behavior was observed suggesting a structural difference between chemical and clastic sediments. After the initial loss of the overgrowths, image scale porosity (> approximately 1 cm) decreases with time. Submicron porosity (typically approximately 25% of the total) is relatively constant or slightly decreasing in absolute terms, but the percent change is significant. Fractal dimensions decrease at larger scales, and increase at smaller scales with increased precipitation. Abstract Copyright (2015) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Anovitz, Lawrence M AU - Cole, David R AU - Jackson, Andrew J AU - Rother, Gernot AU - Littrell, Kenneth C AU - Allard, Lawrence F AU - Pollington, Anthony D AU - Wesolowski, David J Y1 - 2015/06/01/ PY - 2015 DA - 2015 Jun 01 SP - 199 EP - 222 PB - Elsevier, New York, NY VL - 158 SN - 0016-7037, 0016-7037 KW - silicates KW - X-ray diffraction data KW - silica minerals KW - Middle Ordovician KW - sandstone KW - petroleum KW - crystal growth KW - reservoir rocks KW - ground water KW - Ordovician KW - sedimentary rocks KW - water-rock interaction KW - grain boundaries KW - retention KW - framework silicates KW - Saint Peter Sandstone KW - pH KW - chemically precipitated rocks KW - textures KW - Paleozoic KW - electron microscopy data KW - migration of elements KW - TEM data KW - porosity KW - aquifers KW - physical properties KW - saturation KW - precipitation KW - mathematical methods KW - quartz KW - clastic rocks KW - SEM data KW - backscattering KW - 06A:Sedimentary petrology KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696873163?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Effect+of+quartz+overgrowth+precipitation+on+the+multiscale+porosity+of+sandstone%3B+a+%28U%29SANS+and+imaging+analysis&rft.au=Anovitz%2C+Lawrence+M%3BCole%2C+David+R%3BJackson%2C+Andrew+J%3BRother%2C+Gernot%3BLittrell%2C+Kenneth+C%3BAllard%2C+Lawrence+F%3BPollington%2C+Anthony+D%3BWesolowski%2C+David+J&rft.aulast=Anovitz&rft.aufirst=Lawrence&rft.date=2015-06-01&rft.volume=158&rft.issue=&rft.spage=199&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2015.01.028 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 76 N1 - PubXState - NY N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-07-17 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - aquifers; backscattering; chemically precipitated rocks; clastic rocks; crystal growth; electron microscopy data; framework silicates; grain boundaries; ground water; mathematical methods; Middle Ordovician; migration of elements; Ordovician; Paleozoic; petroleum; pH; physical properties; porosity; precipitation; quartz; reservoir rocks; retention; Saint Peter Sandstone; sandstone; saturation; sedimentary rocks; SEM data; silica minerals; silicates; TEM data; textures; water-rock interaction; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.gca.2015.01.028 ER - TY - CPAPER T1 - Hamiltonian Ray Tracing in an Arbitrary Curvilinear Coordinate System - Amplitude Estimation T2 - 169th Meeting of the Acoustical Society of America AN - 1669823018; 6341871 JF - 169th Meeting of the Acoustical Society of America AU - Blom, Philip AU - Arrowsmith, Stephen Y1 - 2015/05/18/ PY - 2015 DA - 2015 May 18 KW - Coordinate systems UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1669823018?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=169th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Hamiltonian+Ray+Tracing+in+an+Arbitrary+Curvilinear+Coordinate+System+-+Amplitude+Estimation&rft.au=Blom%2C+Philip%3BArrowsmith%2C+Stephen&rft.aulast=Blom&rft.aufirst=Philip&rft.date=2015-05-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=169th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://asa2015spring.abstractcentral.com/s1agxt/com.scholarone.s1agxt.s1agxt/S1A.html?&a=3285&b=1593989&c=27569&d=17&e=28187732&f=17&g=null&h=BROWSE_THE_PROGRAM&i=N&j=N&k=N&l=Y&m=jRCZ8xrkiyxbb6qNw0u5Nm6JO3s&n=0&o=1426591327892&q=Y&p=https://asa2015spring.abstractcentral.com LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-31 N1 - Last updated - 2015-04-06 ER - TY - CPAPER T1 - Resonant Ultrasound Spectroscopy with Large Attenuation and Arbitrary Geometry T2 - 169th Meeting of the Acoustical Society of America AN - 1669822898; 6341798 JF - 169th Meeting of the Acoustical Society of America AU - Remillieux, Marcel AU - Ulrich, T AU - Le Bas, Pierre-Yves Y1 - 2015/05/18/ PY - 2015 DA - 2015 May 18 KW - Spectroscopy KW - Ultrasound UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1669822898?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=169th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Resonant+Ultrasound+Spectroscopy+with+Large+Attenuation+and+Arbitrary+Geometry&rft.au=Remillieux%2C+Marcel%3BUlrich%2C+T%3BLe+Bas%2C+Pierre-Yves&rft.aulast=Remillieux&rft.aufirst=Marcel&rft.date=2015-05-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=169th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://asa2015spring.abstractcentral.com/planner.jsp LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-31 N1 - Last updated - 2015-04-06 ER - TY - CPAPER T1 - Three Component Vibrational Time Reversal Communication T2 - 169th Meeting of the Acoustical Society of America AN - 1669822440; 6342050 JF - 169th Meeting of the Acoustical Society of America AU - Anderson, Brian AU - Ulrich, Timothy AU - Ten Cate, James Y1 - 2015/05/18/ PY - 2015 DA - 2015 May 18 KW - Communication UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1669822440?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=169th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Three+Component+Vibrational+Time+Reversal+Communication&rft.au=Anderson%2C+Brian%3BUlrich%2C+Timothy%3BTen+Cate%2C+James&rft.aulast=Anderson&rft.aufirst=Brian&rft.date=2015-05-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=169th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://asa2015spring.abstractcentral.com/planner.jsp LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-31 N1 - Last updated - 2015-04-06 ER - TY - JOUR T1 - Nonlinear subcyclotron resonance as a formationmechanism for gaps in banded chorus AN - 1808378827; PQ0001664368 AB - An interesting characteristic of magnetospheric chorus is the presence of a frequency gap at omega 0.5 Omega sub(e), where Omega sub(e) is the electron cyclotron angular frequency. Recent chorus observations sometimes show additional gaps near 0.3 Omega sub(e) and 0.6 Omega sub(e). Here we present a novel nonlinear mechanism for the formation of these gaps using Hamiltonian theory and test particle simulations in a homogeneous, magnetized, collisionless plasma. We find that an oblique whistler wave with frequency at a fraction of the electron cyclotron frequency can resonate with electrons, leading to effective energy exchange between the wave and particles. Key Points * Recent observations of chorus show multiple bands * Nonlinear wave-particle resonances can occur at subcyclotron frequencies * Subcyclotron resonance may lead to formation of gaps in banded chorus JF - Geophysical Research Letters AU - Fu, Xiangrong AU - Guo, Zehua AU - Dong, Chuanfei AU - Gary, SPeter AD - Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 3150 EP - 3159 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 42 IS - 9 SN - 0094-8276, 0094-8276 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Wave frequency KW - Simulation Analysis KW - Resonance KW - Energy KW - Waves KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808378827?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Nonlinear+subcyclotron+resonance+as+a+formationmechanism+for+gaps+in+banded+chorus&rft.au=Fu%2C+Xiangrong%3BGuo%2C+Zehua%3BDong%2C+Chuanfei%3BGary%2C+SPeter&rft.aulast=Fu&rft.aufirst=Xiangrong&rft.date=2015-05-01&rft.volume=42&rft.issue=9&rft.spage=3150&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2015GL064182 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Wave frequency; Resonance; Simulation Analysis; Energy; Waves DO - http://dx.doi.org/10.1002/2015GL064182 ER - TY - JOUR T1 - Plasma Temperature Inference from Deuterium-Tritium/Deuterium-Deuterium Neutron Discrimination AN - 1770378067; PQ0002237223 AB - Deuterium-deuterium and deuterium-tritium reaction rates may be compared to determine plasma temperatures in the 10-to 200-eV range. Distinguishing neutrons from these two reactions is difficult when yields are low or unpredictable. Time-of-flight (TOF) methods fail if the source is extended in time. These neutrons may be distinguished because inelastic scattering of more energetic neutrons by carbon produces a 4.44-MeV gamma ray and because hydrogenous material preferentially attenuates lower-energy neutrons. We describe a detector system that can discriminate between lower-and higher-energy neutrons for fluences as low as O(10 super(2)) neutrons per sterad even when TOF methods fail, define a figure of merit, and calculate its performance over a broad range of parameters. JF - Nuclear Science and Engineering AU - Katz, J I AD - Los Alamos National Laboratory P. O. Box 1663, Los Alamos, New Mexico 87545 katz@wuphys.wustl.edu Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 117 EP - 122 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 180 IS - 1 SN - 0029-5639, 0029-5639 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Carbon KW - Inelastic scattering KW - Figure of merit KW - Reactions (nuclear) KW - Plasma temperature KW - Discrimination KW - Attenuation KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770378067?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Science+and+Engineering&rft.atitle=Plasma+Temperature+Inference+from+Deuterium-Tritium%2FDeuterium-Deuterium+Neutron+Discrimination&rft.au=Katz%2C+J+I&rft.aulast=Katz&rft.aufirst=J&rft.date=2015-05-01&rft.volume=180&rft.issue=1&rft.spage=117&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/10.13182%2FNSE14-81 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Number of references - 3 N1 - Last updated - 2016-03-04 DO - http://dx.doi.org/10.13182/NSE14-81 ER - TY - JOUR T1 - Modeling constituent redistribution in U-Pu-Zr metallic fuel using the advanced fuel performance code BISON AN - 1753542040; PQ0002043881 AB - An improved robust formulation for constituent distribution in metallic nuclear fuels is developed and implemented into the advanced fuel performance framework BISON. The coupled thermal diffusion equations are solved simultaneously to reanalyze the constituent redistribution in post irradiation data from fuel tests performed in Experimental Breeder Reactor-II (EBR-II). Deficiencies observed in previously published formulation and numerical implementations are also improved. The present model corrects an inconsistency between the enthalpies of solution and the solubility limit curves of the phase diagram while also adding an artificial diffusion term when in the 2-phase regime that stabilizes the standard Galerkin finite element (FE) method used by BISON. The model validation included testing against experimental data from fuel pins 1179, DP16 and T459, irradiated in ERR-II. Optimized diffusion coefficients suggest relative improvements in comparison to previous reported values. The most influential or uncertain phase is found to be the gamma phase, followed by alpha phase, and thirdly the beta phase: indicating separate effect testing should concentrate on these phases. JF - Nuclear Engineering and Design AU - Galloway, J AU - Unal, C AU - Carlson, N AU - Porter, D AU - Hayes, S AD - Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, United States PY - 2015 SP - 1 EP - 17 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 286 SN - 0029-5493, 0029-5493 KW - Mechanical & Transportation Engineering Abstracts (MT); METADEX (MD); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Finite element method KW - Mathematical models KW - Constituents KW - Irradiation KW - Fuels KW - Bison KW - Nuclear reactor components KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1753542040?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Engineering+and+Design&rft.atitle=Modeling+constituent+redistribution+in+U-Pu-Zr+metallic+fuel+using+the+advanced+fuel+performance+code+BISON&rft.au=Galloway%2C+J%3BUnal%2C+C%3BCarlson%2C+N%3BPorter%2C+D%3BHayes%2C+S&rft.aulast=Galloway&rft.aufirst=J&rft.date=2015-05-01&rft.volume=286&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Nuclear+Engineering+and+Design&rft.issn=00295493&rft_id=info:doi/10.1016%2Fj.nucengdes.2015.01.014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-01-01 N1 - Number of references - 34 N1 - Last updated - 2016-01-06 DO - http://dx.doi.org/10.1016/j.nucengdes.2015.01.014 ER - TY - JOUR T1 - PrimerDesign-M: a multiple-alignment based multiple-primer design tool for walking across variable genomes AN - 1701473915; PQ0001733294 AB - Summary: Analyses of entire viral genomes or mtDNA requires comprehensive design of many primers across their genomes. Furthermore, simultaneous optimization of several DNA primer design criteria may improve overall experimental efficiency and downstream bioinformatic processing. To achieve these goals, we developed PrimerDesign-M. It includes several options for multiple-primer design, allowing researchers to efficiently design walking primers that cover long DNA targets, such as entire HIV-1 genomes, and that optimizes primers simultaneously informed by genetic diversity in multiple alignments and experimental design constraints given by the user. PrimerDesign-M can also design primers that include DNA barcodes and minimize primer dimerization. PrimerDesign-M finds optimal primers for highly variable DNA targets and facilitates design flexibility by suggesting alternative designs to adapt to experimental conditions.Availability and implementation: PrimerDesign-M is available as a webtool at http://www.hiv.lanl.gov/content/sequence/PRIMER_DESIGN/primer_desi g n.html. JF - Bioinformatics AU - Yoon, Hyejin AU - Leitner, Thomas AD - *To whom correspondence should be addressed., tkl@lanl.gov Y1 - 2015/05/01/ PY - 2015 DA - 2015 May 01 SP - 1472 EP - 1474 PB - Oxford University Press, Great Clarendon Street Oxford OX2 6DP United Kingdom VL - 31 IS - 9 SN - 1367-4803, 1367-4803 KW - Biochemistry Abstracts 2: Nucleic Acids; Biotechnology and Bioengineering Abstracts KW - Genomes KW - Mitochondrial DNA KW - Nucleotide sequence KW - Human immunodeficiency virus 1 KW - DNA KW - Walking KW - Genetic diversity KW - Primers KW - Bioinformatics KW - N 14810:Methods KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701473915?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bioinformatics&rft.atitle=PrimerDesign-M%3A+a+multiple-alignment+based+multiple-primer+design+tool+for+walking+across+variable+genomes&rft.au=Yoon%2C+Hyejin%3BLeitner%2C+Thomas&rft.aulast=Yoon&rft.aufirst=Hyejin&rft.date=2015-05-01&rft.volume=31&rft.issue=9&rft.spage=1472&rft.isbn=&rft.btitle=&rft.title=Bioinformatics&rft.issn=13674803&rft_id=info:doi/10.1093%2Fbioinformatics%2Fbtu832 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Genomes; Mitochondrial DNA; Nucleotide sequence; DNA; Genetic diversity; Walking; Primers; Bioinformatics; Human immunodeficiency virus 1 DO - http://dx.doi.org/10.1093/bioinformatics/btu832 ER - TY - JOUR T1 - Techniques to Alleviate Nuisance Alarms Observed by PCMs Following super(222)Rn-Progeny Deposition on Clothing AN - 1694972018; PQ0001594686 AB - This paper presents technically-based techniques to deal with nuisance personnel contamination monitor (PCM) alarms. The techniques derive from the fundamental physical characteristics of radon progeny. Some PCM alarms, although valid alarms and not actually "false," could be due to nuisance naturally-occurring radionuclides (i.e., radon progeny). Based on certain observed characteristics of the radon progeny, several prompt techniques are discussed that could either remediate or at least mitigate the problem of nuisance alarms. Examples are provided which demonstrate the effective use of the techniques. JF - Health Physics AU - Justus, Alan L AD - Los Alamos National Laboratory (LANL), Los Alamos, NM 87545, ajustus@lanl.gov Y1 - 2015/05// PY - 2015 DA - May 2015 SP - S72 EP - S83 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 108 IS - 5 SN - 0017-9078, 0017-9078 KW - Health & Safety Science Abstracts KW - operational topics KW - monitoring KW - personnel KW - contamination KW - radon progeny KW - Radioisotopes KW - Radon KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1694972018?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Health+Physics&rft.atitle=Techniques+to+Alleviate+Nuisance+Alarms+Observed+by+PCMs+Following+super%28222%29Rn-Progeny+Deposition+on+Clothing&rft.au=Justus%2C+Alan+L&rft.aulast=Justus&rft.aufirst=Alan&rft.date=2015-05-01&rft.volume=108&rft.issue=5&rft.spage=S72&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-23 N1 - SubjectsTermNotLitGenreText - Radioisotopes; Radon ER - TY - JOUR T1 - Double-difference traveltime tomography with edge-preserving regularization and a priori interfaces AN - 1692741849; 2015-060493 AB - Conventional traveltime seismic tomography methods with Tikhonov regularization (L2 norm) typically produce smooth models, but these models may be inappropriate when subsurface structure contains discontinuous features, such as faults or fractures, indicating that tomographic models should contain sharp boundaries. For this reason, we develop a double-difference (DD) traveltime tomography method that uses a modified total-variation regularization scheme incorporated with a priori information on interfaces to preserve sharp property contrasts and obtain accurate inversion results. In order to solve the inversion problem, we employ an alternating minimization method to decouple the original DD tomography problem into two separate subproblems: a conventional DD tomography with Tikhonov regularization and a L2 total-variation inversion. We use the LSQR linear solver to solve the Tikhonov inversion and the split-Bregman iterative method to solve the total-variation inversion. Through our numerical examples, we show that our new DD tomography method yields more accurate results than the conventional DD tomography method at almost the same computational cost. JF - Geophysical Journal International AU - Lin, Youzuo AU - Syracuse, Ellen M AU - Maceira, Monica AU - Zhang, Haijiang AU - Larmat, Carene Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 574 EP - 594 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 201 IS - 2 SN - 0956-540X, 0956-540X KW - tomography KW - P-waves KW - body waves KW - double-difference method KW - elastic waves KW - seismicity KW - mathematical methods KW - traveltime KW - velocity KW - seismic waves KW - algorithms KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692741849?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Double-difference+traveltime+tomography+with+edge-preserving+regularization+and+a+priori+interfaces&rft.au=Lin%2C+Youzuo%3BSyracuse%2C+Ellen+M%3BMaceira%2C+Monica%3BZhang%2C+Haijiang%3BLarmat%2C+Carene&rft.aulast=Lin&rft.aufirst=Youzuo&rft.date=2015-05-01&rft.volume=201&rft.issue=2&rft.spage=574&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggv047 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 53 N1 - Document feature - illus. incl. 1 table, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-07-02 N1 - SubjectsTermNotLitGenreText - algorithms; body waves; double-difference method; earthquakes; elastic waves; mathematical methods; P-waves; seismic waves; seismicity; tomography; traveltime; velocity DO - http://dx.doi.org/10.1093/gji/ggv047 ER - TY - JOUR T1 - Structural vs.intrinsic carriers: contrasting effects of cation chemistry and disorder on ionic conductivity in pyrochlores AN - 1687668574; PQ0001592378 AB - We use molecular dynamics simulations to investigate the role of cation disorder on oxygen diffusion in Gd sub(2)Zr sub(2)O sub(7) (GZO) and Gd sub(2)Ti sub(2)O sub(7) (GTO) pyrochlores, a class of complex oxides which contain a structural vacancy relative to the basic fluorite structure. The introduction of disorder has distinct effects depending on the chemistry of the material, increasing the mobility of structural carriers by up to four orders of magnitude in GZO. In contrast, in GTO, there is no mobility at zero or low disorder on the ns timescale, but higher disorder liberates the otherwise immobile carriers, allowing diffusion with rates comparable to GZO for the fully disordered material. We show that the cation disorder enhances the diffusivity by both increasing the concentration of mobile structural carriers and their individual mobility. The disorder also influences the diffusion in materials containing intrinsic carriers, such as additional vacancies V sub(O) or oxygen interstitials O sub(I). While in ordered GZO and GTO the contribution of the intrinsic carriers dominates the overall diffusion of oxygen, O sub(I) in GZO contributes along with structural carriers, and the total diffusion rate can be calculated by assuming simple additive contributions from the two sources. Although the disorder in the materials with intrinsic defects usually enhances the diffusivity as in the defect-free case, in low concentrations, cation antisites A sub(B) or B sub(A), where A = Gd and B = Zr or Ti, can act as traps for fast intrinsic defects. The trapping results in a lowering of the diffusivity, and causes a non-monotonic behavior of the diffusivity with disorder. By contrast, in the case of slow intrinsic defects, the main effect of the disorder is to liberate the structural carriers, resulting in an increase of the diffusivity regardless of the defect trapping. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Perriot, Romain AU - Uberuaga, Blas P AD - Materials Science and Technology Division; Los Alamos National Laboratory; Los Alamos 87545; USA; , rperriot@lanl.gov Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 11554 EP - 11565 PB - Royal Society of Chemistry VL - 3 IS - 21 SN - 2050-7488, 2050-7488 KW - Sustainability Science Abstracts KW - Oxygen KW - Cations KW - Mobility KW - Behavior KW - Energy KW - Simulation KW - Diffusion KW - Additives KW - Sustainability KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1687668574?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.atitle=Structural+vs.intrinsic+carriers%3A+contrasting+effects+of+cation+chemistry+and+disorder+on+ionic+conductivity+in+pyrochlores&rft.au=Perriot%2C+Romain%3BUberuaga%2C+Blas+P&rft.aulast=Perriot&rft.aufirst=Romain&rft.date=2015-05-01&rft.volume=3&rft.issue=21&rft.spage=11554&rft.isbn=&rft.btitle=&rft.title=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.issn=20507488&rft_id=info:doi/10.1039%2Fc5ta01692d LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-06-01 N1 - Number of references - 45 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Oxygen; Behavior; Mobility; Cations; Energy; Simulation; Diffusion; Additives; Sustainability DO - http://dx.doi.org/10.1039/c5ta01692d ER - TY - JOUR T1 - Historical and current perspectives on Clostridium botulinum diversity. AN - 1677883827; 25312020 AB - For nearly one hundred years, researchers have attempted to categorize botulinum neurotoxin-producing clostridia and the toxins that they produce according to biochemical characterizations, serological comparisons, and genetic analyses. Throughout this period the bacteria and their toxins have defied such attempts at categorization. Below is a description of both historic and current Clostridium botulinum strain and neurotoxin information that illustrates how each new finding has significantly added to the knowledge of the botulinum neurotoxin-containing clostridia and their diversity. JF - Research in microbiology AU - Smith, Theresa J AU - Hill, Karen K AU - Raphael, Brian H AD - Molecular and Translational Sciences, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD 21702, USA. Electronic address: theresa.j.smith.civ@mail.mil. ; Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. ; Enteric Diseases Laboratory Branch, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA. Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 290 EP - 302 VL - 166 IS - 4 KW - Botulinum Toxins KW - EC 3.4.24.69 KW - Index Medicus KW - Serotype KW - Botulinum neurotoxins KW - Clostridium botulinum KW - Genomics KW - History, 21st Century KW - History, 20th Century KW - Bacterial Typing Techniques -- methods KW - Molecular Typing -- methods KW - Serotyping -- methods KW - Genetic Variation KW - Clostridium botulinum -- classification KW - Botulinum Toxins -- genetics KW - Clostridium botulinum -- isolation & purification KW - Clostridium botulinum -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1677883827?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Research+in+microbiology&rft.atitle=Historical+and+current+perspectives+on+Clostridium+botulinum+diversity.&rft.au=Smith%2C+Theresa+J%3BHill%2C+Karen+K%3BRaphael%2C+Brian+H&rft.aulast=Smith&rft.aufirst=Theresa&rft.date=2015-05-01&rft.volume=166&rft.issue=4&rft.spage=290&rft.isbn=&rft.btitle=&rft.title=Research+in+microbiology&rft.issn=1769-7123&rft_id=info:doi/10.1016%2Fj.resmic.2014.09.007 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-01-18 N1 - Date created - 2015-05-02 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.resmic.2014.09.007 ER - TY - JOUR T1 - Location of high-frequency P wave microseismic noise in the Pacific Ocean using multiple small aperture arrays AN - 1873351286; 2017-014840 AB - We investigate source locations of P wave microseisms within a narrow frequency band (0.67-1.33 Hz) that is significantly higher than the classic microseism band ( approximately 0.05-0.3 Hz). Employing a backprojection method, we analyze data recorded during January 2010 from five International Monitoring System arrays that border the Pacific Ocean. We develop a ranking scheme that allows us to combine beam power from multiple arrays to obtain robust locations of the microseisms. Some individual arrays exhibit a strong regional component, but results from the combination of all arrays show high-frequency P wave energy emanating from the North Pacific basin, in general agreement with previous observations in the double-frequency (DF) microseism band ( approximately 0.1-0.3 Hz). This suggests that the North Pacific source of ambient P noise covers a broad range of frequencies and that the wave-wave interaction model is likely valid at shorter periods. Abstract Copyright (2015). American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Pyle, Moira L AU - Koper, Keith D AU - Euler, Garrett G AU - Burlacu, Relu Y1 - 2015/04/28/ PY - 2015 DA - 2015 Apr 28 SP - 2700 EP - 2708 PB - American Geophysical Union, Washington, DC VL - 42 IS - 8 SN - 0094-8276, 0094-8276 KW - oceanic crust KW - P-waves KW - body waves KW - monitoring KW - lithosphere KW - Pacific region KW - oceanic lithosphere KW - elastic waves KW - noise KW - Pacific Basin KW - Pacific Ocean KW - microseisms KW - Circum-Pacific region KW - seismic waves KW - crust KW - arrays KW - 19:Seismology KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873351286?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Location+of+high-frequency+P+wave+microseismic+noise+in+the+Pacific+Ocean+using+multiple+small+aperture+arrays&rft.au=Pyle%2C+Moira+L%3BKoper%2C+Keith+D%3BEuler%2C+Garrett+G%3BBurlacu%2C+Relu&rft.aulast=Pyle&rft.aufirst=Moira&rft.date=2015-04-28&rft.volume=42&rft.issue=8&rft.spage=2700&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2015GL063530 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 36 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2017-03-02 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - arrays; body waves; Circum-Pacific region; crust; elastic waves; lithosphere; microseisms; monitoring; noise; oceanic crust; oceanic lithosphere; P-waves; Pacific Basin; Pacific Ocean; Pacific region; seismic waves DO - http://dx.doi.org/10.1002/2015GL063530 ER - TY - JOUR T1 - Location of high-frequency P wave microseismic noise in the Pacific Ocean using multiple small aperture arrays AN - 1832610427; 742165-18 AB - We investigate source locations of P wave microseisms within a narrow frequency band (0.67-1.33 Hz) that is significantly higher than the classic microseism band ( nearly equal 0.05-0.3 Hz). Employing a backprojection method, we analyze data recorded during January 2010 from five International Monitoring System arrays that border the Pacific Ocean. We develop a ranking scheme that allows us to combine beam power from multiple arrays to obtain robust locations of the microseisms. Some individual arrays exhibit a strong regional component, but results from the combination of all arrays show high-frequency P wave energy emanating from the North Pacific basin, in general agreement with previous observations in the double-frequency (DF) microseism band ( nearly equal 0.1-0.3 Hz). This suggests that the North Pacific source of ambient P noise covers a broad range of frequencies and that the wave-wave interaction model is likely valid at shorter periods. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Pyle, Moira L AU - Koper, Keith D AU - Euler, Garrett G AU - Burlacu, Relu Y1 - 2015/04/28/ PY - 2015 DA - 2015 Apr 28 SP - 2700 EP - 2708 PB - American Geophysical Union, Washington, DC VL - 42 IS - 8 SN - 0094-8276, 0094-8276 KW - oceanic crust KW - P-waves KW - body waves KW - monitoring KW - lithosphere KW - Pacific region KW - oceanic lithosphere KW - elastic waves KW - noise KW - Pacific Basin KW - Pacific Ocean KW - microseisms KW - Circum-Pacific region KW - seismic waves KW - crust KW - arrays KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832610427?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Location+of+high-frequency+P+wave+microseismic+noise+in+the+Pacific+Ocean+using+multiple+small+aperture+arrays&rft.au=Pyle%2C+Moira+L%3BKoper%2C+Keith+D%3BEuler%2C+Garrett+G%3BBurlacu%2C+Relu&rft.aulast=Pyle&rft.aufirst=Moira&rft.date=2015-04-28&rft.volume=42&rft.issue=8&rft.spage=2700&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2015GL063530 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Number of references - 36 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2017-01-24 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - arrays; body waves; Circum-Pacific region; crust; elastic waves; lithosphere; microseisms; monitoring; noise; oceanic crust; oceanic lithosphere; P-waves; Pacific Basin; Pacific Ocean; Pacific region; seismic waves DO - http://dx.doi.org/10.1002/2015GL063530 ER - TY - JOUR T1 - Direct numerical simulation of fully saturated flow in natural porous media at the pore scale: a comparison of three computational systems AN - 1832624044; 743062-11 AB - Direct numerical simulations of flow through two millimeter-scale rock samples of limestone and sandstone are performed using three diverse fluid dynamic simulators. The resulting steady-state velocity fields are compared in terms of the associated empirical probability density functions (PDFs) and key statistics of the velocity fields. The pore space geometry of each sample is imaged at 5.06-mu m voxel size resolution using X-ray microtomography. The samples offer contrasting characteristics in terms of total connected porosity (about 0.31 for the limestone and 0.07 for the sandstone) and are typical of several applications in hydrogeology and petroleum engineering. The three-dimensional fluid velocity fields within the explicit pore spaces are simulated using ANSYS(Registered trademark) FLUENT(Registered trademark) ANSYS Inc. (2009), EULAG Prusa et al. (Comput. Fluids 37, 1193-1207 2008), and SSTOKES Sarkar et al. (2002). These computational approaches are highly disperse in terms of algorithmic complexity, differ in terms of their governing equations, the adopted numerical methodologies, the enforcement of internal no-slip boundary conditions at the fluid-solid interface, and the computational mesh structure. As metrics of comparison to probe in a statistical sense the internal similarities/differences across sample populations of velocities obtained through the computational systems, we consider (i) integral quantities, such as the Darcy flux and (ii) main statistical moments of local velocity distributions including local correlations between velocity fields. Comparison of simulation results indicates that mutually consistent estimates of the state of flow are obtained in the analyzed samples of natural pore spaces despite the considerable differences associated with the three computational approaches. We note that in the higher porosity limestone sample, the structures of the velocity fields obtained using ANSYS FLUENT and EULAG are more alike than either compared against the results obtained using SSTOKES. In the low-porosity sample, the structures of the velocity fields obtained by EULAG and SSTOKES are more similar than either is to the fields obtained using ANSYS FLUENT. With respect to macroscopic quantities, ANSYS FLUENT and SSTOKES provide similar results in terms of the average vertical velocity for both of the complex microscale geometries considered, while EULAG tends to render the largest velocity values. The influence of the pore space structure on fluid velocity field characteristics is also discussed. Copyright 2015 Springer International Publishing Switzerland JF - Computational Geosciences AU - Siena, M AU - Hyman, J D AU - Riva, M AU - Guadagnini, A AU - Winter, C L AU - Smolarkiewicz, P K AU - Gouze, P AU - Sadhukhan, S AU - Inzoli, F AU - Guedon, G AU - Colombo, E Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 423 EP - 437 PB - Springer, Dordrecht VL - 19 IS - 2 SN - 1420-0597, 1420-0597 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832624044?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computational+Geosciences&rft.atitle=Direct+numerical+simulation+of+fully+saturated+flow+in+natural+porous+media+at+the+pore+scale%3A+a+comparison+of+three+computational+systems&rft.au=Siena%2C+M%3BHyman%2C+J+D%3BRiva%2C+M%3BGuadagnini%2C+A%3BWinter%2C+C+L%3BSmolarkiewicz%2C+P+K%3BGouze%2C+P%3BSadhukhan%2C+S%3BInzoli%2C+F%3BGuedon%2C+G%3BColombo%2C+E&rft.aulast=Siena&rft.aufirst=M&rft.date=2015-04-01&rft.volume=19&rft.issue=2&rft.spage=423&rft.isbn=&rft.btitle=&rft.title=Computational+Geosciences&rft.issn=14200597&rft_id=info:doi/10.1007%2Fs10596-015-9486-7 L2 - http://www.springerlink.com/content/101744/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1007/s10596-015-9486-7 ER - TY - JOUR T1 - Infrasound observations from a seismo-acoustic hammer source at the Nevada National Security Site AN - 1812218634; 2016-068532 JF - Seismological Research Letters AU - Jones, K R AU - Abbott, R E AU - Hampshire, J AU - White, R AU - Marcillo, O AU - Whitaker, R AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 732 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - Nevada Test Site KW - Nevada National Security Site KW - experimental studies KW - technology KW - detection KW - seismicity KW - explosions KW - testing KW - nuclear explosions KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812218634?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Infrasound+observations+from+a+seismo-acoustic+hammer+source+at+the+Nevada+National+Security+Site&rft.au=Jones%2C+K+R%3BAbbott%2C+R+E%3BHampshire%2C+J%3BWhite%2C+R%3BMarcillo%2C+O%3BWhitaker%2C+R%3BAnonymous&rft.aulast=Jones&rft.aufirst=K&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=732&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - detection; experimental studies; explosions; Nevada; Nevada National Security Site; Nevada Test Site; nuclear explosions; seismicity; technology; testing; United States ER - TY - JOUR T1 - Development of a ground motion prediction method for carbon dioxide injection-induced earthquakes AN - 1812218572; 2016-068514 JF - Seismological Research Letters AU - Stone, I P AU - Lee, R C AU - Bradley, C R AU - Larmat, C S AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 728 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - carbon sequestration KW - geologic hazards KW - statistical analysis KW - injection KW - earthquake prediction KW - seismic risk KW - natural hazards KW - ground motion KW - risk assessment KW - induced earthquakes KW - earthquakes KW - uncertainty KW - 19:Seismology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812218572?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Development+of+a+ground+motion+prediction+method+for+carbon+dioxide+injection-induced+earthquakes&rft.au=Stone%2C+I+P%3BLee%2C+R+C%3BBradley%2C+C+R%3BLarmat%2C+C+S%3BAnonymous&rft.aulast=Stone&rft.aufirst=I&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=728&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - carbon sequestration; earthquake prediction; earthquakes; geologic hazards; ground motion; induced earthquakes; injection; natural hazards; risk assessment; seismic risk; statistical analysis; uncertainty ER - TY - JOUR T1 - Lateral variations of P-wave velocity gradient in the uppermost mantle under Eurasia AN - 1812218432; 2016-068254 JF - Seismological Research Letters AU - Yang, X AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 677 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - upper mantle KW - P-waves KW - body waves KW - three-dimensional models KW - plate boundaries KW - mantle KW - elastic waves KW - depth KW - plate tectonics KW - seismicity KW - velocity structure KW - Eurasia KW - propagation KW - seismic waves KW - 19:Seismology KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812218432?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Lateral+variations+of+P-wave+velocity+gradient+in+the+uppermost+mantle+under+Eurasia&rft.au=Yang%2C+X%3BAnonymous&rft.aulast=Yang&rft.aufirst=X&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=677&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; depth; elastic waves; Eurasia; mantle; P-waves; plate boundaries; plate tectonics; propagation; seismic waves; seismicity; three-dimensional models; upper mantle; velocity structure ER - TY - JOUR T1 - Multi-decadal analysis of global trends in microseism intensities; a proxy for changes in storm activity and oceanic wave state AN - 1812214223; 2016-068285 JF - Seismological Research Letters AU - Anthony, R E AU - Aster, Rick C AU - Rowe, C AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 683 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - technology KW - sea ice KW - data processing KW - elastic waves KW - Antarctic Peninsula KW - El Nino Southern Oscillation KW - surface waves KW - seismicity KW - ice KW - data bases KW - storms KW - guided waves KW - global KW - magnitude KW - South Pacific KW - Rayleigh waves KW - noise KW - sea-level changes KW - Antarctica KW - Pacific Ocean KW - ocean waves KW - ground motion KW - seismic waves KW - microearthquakes KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812214223?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Multi-decadal+analysis+of+global+trends+in+microseism+intensities%3B+a+proxy+for+changes+in+storm+activity+and+oceanic+wave+state&rft.au=Anthony%2C+R+E%3BAster%2C+Rick+C%3BRowe%2C+C%3BAnonymous&rft.aulast=Anthony&rft.aufirst=R&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=683&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Antarctic Peninsula; Antarctica; data bases; data processing; earthquakes; El Nino Southern Oscillation; elastic waves; global; ground motion; guided waves; ice; magnitude; microearthquakes; noise; ocean waves; Pacific Ocean; Rayleigh waves; sea ice; sea-level changes; seismic waves; seismicity; South Pacific; storms; surface waves; technology ER - TY - JOUR T1 - Joint inversion of seismic and gravity data for velocity structure and hypocentral locations of the Colombian subduction zone AN - 1812213835; 2016-068273 JF - Seismological Research Letters AU - Syracuse, E M AU - Maceira, M AU - Prieto, G A AU - Zhang, H AU - Ammon, Charles J AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 680 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - upper mantle KW - technology KW - subduction zones KW - mantle KW - Colombia KW - models KW - South America KW - seismicity KW - velocity structure KW - focus KW - seismic networks KW - earthquakes KW - crust KW - 19:Seismology KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812213835?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Joint+inversion+of+seismic+and+gravity+data+for+velocity+structure+and+hypocentral+locations+of+the+Colombian+subduction+zone&rft.au=Syracuse%2C+E+M%3BMaceira%2C+M%3BPrieto%2C+G+A%3BZhang%2C+H%3BAmmon%2C+Charles+J%3BAnonymous&rft.aulast=Syracuse&rft.aufirst=E&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=680&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Colombia; crust; earthquakes; focus; mantle; models; seismic networks; seismicity; South America; subduction zones; technology; upper mantle; velocity structure ER - TY - JOUR T1 - Seismic and ionospheric signatures for monitoring the initiation of a tsunami AN - 1812213584; 2016-068539 JF - Seismological Research Letters AU - Rolland, L M AU - Larmat, C S AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 733 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - tsunamis KW - precursors KW - ionosphere KW - technology KW - monitoring KW - Far East KW - geologic hazards KW - prediction KW - geodesy KW - seismicity KW - seismic risk KW - natural hazards KW - risk assessment KW - Asia KW - Japan KW - instruments KW - 19:Seismology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812213584?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Seismic+and+ionospheric+signatures+for+monitoring+the+initiation+of+a+tsunami&rft.au=Rolland%2C+L+M%3BLarmat%2C+C+S%3BAnonymous&rft.aulast=Rolland&rft.aufirst=L&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=733&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - Asia; Far East; geodesy; geologic hazards; instruments; ionosphere; Japan; monitoring; natural hazards; precursors; prediction; risk assessment; seismic risk; seismicity; technology; tsunamis ER - TY - JOUR T1 - Velocity structure of the Iran region using seismic and gravity observations AN - 1812213512; 2016-068248 JF - Seismological Research Letters AU - Maceira, M AU - Syracuse, E M AU - Bergman, E AU - Phillips, W S AU - Begnaud, M L AU - Zhang, H AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 676 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - tomography KW - Iran KW - technology KW - three-dimensional models KW - elastic waves KW - seismicity KW - velocity structure KW - traveltime KW - Asia KW - earthquakes KW - Middle East KW - crust KW - 19:Seismology KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812213512?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Velocity+structure+of+the+Iran+region+using+seismic+and+gravity+observations&rft.au=Maceira%2C+M%3BSyracuse%2C+E+M%3BBergman%2C+E%3BPhillips%2C+W+S%3BBegnaud%2C+M+L%3BZhang%2C+H%3BAnonymous&rft.aulast=Maceira&rft.aufirst=M&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=676&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Asia; crust; earthquakes; elastic waves; Iran; Middle East; seismicity; technology; three-dimensional models; tomography; traveltime; velocity structure ER - TY - JOUR T1 - On the use of microbarometers on balloon platforms to probe the internal structure of Venus AN - 1812213398; 2016-068536 JF - Seismological Research Letters AU - Arrowsmith, S J AU - Bowman, Daniel C AU - Rolland, L M AU - Lees, Jonathan M AU - Mimoun, D AU - Hall, J AU - Marcillo, O AU - Whitaker, R AU - Nolet, G AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 732 EP - 733 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - terrestrial planets KW - planets KW - technology KW - geologic barometry KW - Venus KW - microbarometers KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812213398?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=On+the+use+of+microbarometers+on+balloon+platforms+to+probe+the+internal+structure+of+Venus&rft.au=Arrowsmith%2C+S+J%3BBowman%2C+Daniel+C%3BRolland%2C+L+M%3BLees%2C+Jonathan+M%3BMimoun%2C+D%3BHall%2C+J%3BMarcillo%2C+O%3BWhitaker%2C+R%3BNolet%2C+G%3BAnonymous&rft.aulast=Arrowsmith&rft.aufirst=S&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=732&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - geologic barometry; instruments; microbarometers; planets; technology; terrestrial planets; Venus ER - TY - JOUR T1 - A statistical framework for inversion of atmospheric winds using a distant continuous infrasonic source AN - 1812213312; 2016-068534 JF - Seismological Research Letters AU - Blom, P S AU - Arrowsmith, S J AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 732 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - precursors KW - technology KW - seismicity KW - statistical analysis KW - infrasound waves KW - atmosphere KW - propagation KW - earthquakes KW - winds KW - energy KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812213312?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=A+statistical+framework+for+inversion+of+atmospheric+winds+using+a+distant+continuous+infrasonic+source&rft.au=Blom%2C+P+S%3BArrowsmith%2C+S+J%3BAnonymous&rft.aulast=Blom&rft.aufirst=P&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=732&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - atmosphere; earthquakes; energy; infrasound waves; precursors; propagation; seismicity; statistical analysis; technology; winds ER - TY - JOUR T1 - Passive and active seismic observations of site and topographic response on a mesa near Los Alamos, New Mexico AN - 1812213010; 2016-068449 JF - Seismological Research Letters AU - Stolte, A C AU - Cox, B R AU - Larmat, C S AU - Stokoe, K H AU - Lee, R C AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 715 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - technology KW - mesas KW - three-dimensional models KW - spectral analysis KW - New Mexico KW - Los Alamos County New Mexico KW - erosion features KW - seismic response KW - wave amplification KW - Los Alamos New Mexico KW - topography KW - seismicity KW - ground motion KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812213010?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Passive+and+active+seismic+observations+of+site+and+topographic+response+on+a+mesa+near+Los+Alamos%2C+New+Mexico&rft.au=Stolte%2C+A+C%3BCox%2C+B+R%3BLarmat%2C+C+S%3BStokoe%2C+K+H%3BLee%2C+R+C%3BAnonymous&rft.aulast=Stolte&rft.aufirst=A&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=715&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - earthquakes; erosion features; ground motion; Los Alamos County New Mexico; Los Alamos New Mexico; mesas; New Mexico; seismic response; seismicity; spectral analysis; technology; three-dimensional models; topography; United States; wave amplification ER - TY - JOUR T1 - Observation of temporal variations in seismicity and crustal properties AN - 1812211199; 2016-068296 JF - Seismological Research Letters AU - Delorey, Andrew A AU - Johnson, P A AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 685 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - geologic hazards KW - strain KW - seismicity KW - seismic risk KW - natural hazards KW - risk assessment KW - effects KW - temporal distribution KW - tectonics KW - seismotectonics KW - crust KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812211199?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Observation+of+temporal+variations+in+seismicity+and+crustal+properties&rft.au=Delorey%2C+Andrew+A%3BJohnson%2C+P+A%3BAnonymous&rft.aulast=Delorey&rft.aufirst=Andrew&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=685&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - crust; effects; geologic hazards; natural hazards; risk assessment; seismic risk; seismicity; seismotectonics; strain; tectonics; temporal distribution ER - TY - JOUR T1 - Extending SALSA3D; adding secondary phases to a global 3D model for improved seismic event location AN - 1812211116; 2016-068267 JF - Seismological Research Letters AU - Begnaud, M L AU - Ballard, S AU - Young, C J AU - Hipp, J R AU - Encarnacao, A V AU - Maceira, M AU - Phillips, W S AU - Chael, E P AU - Rowe, C A AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 679 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - tomography KW - P-waves KW - body waves KW - technology KW - three-dimensional models KW - explosions KW - prediction KW - elastic waves KW - seismic sources KW - detection KW - seismicity KW - SALSA3D KW - focus KW - seismic waves KW - compression KW - earthquakes KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812211116?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Extending+SALSA3D%3B+adding+secondary+phases+to+a+global+3D+model+for+improved+seismic+event+location&rft.au=Begnaud%2C+M+L%3BBallard%2C+S%3BYoung%2C+C+J%3BHipp%2C+J+R%3BEncarnacao%2C+A+V%3BMaceira%2C+M%3BPhillips%2C+W+S%3BChael%2C+E+P%3BRowe%2C+C+A%3BAnonymous&rft.aulast=Begnaud&rft.aufirst=M&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=679&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; compression; detection; earthquakes; elastic waves; explosions; focus; P-waves; prediction; S-waves; SALSA3D; seismic sources; seismic waves; seismicity; technology; three-dimensional models; tomography ER - TY - JOUR T1 - On the array processing of wind-farm infrasound signals AN - 1812210938; 2016-068535 JF - Seismological Research Letters AU - Marcillo, O AU - Arrowsmith, S J AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 732 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - wind energy KW - technology KW - detection KW - infrasound waves KW - geophysical methods KW - harmonics KW - arrays KW - signals KW - seismic methods KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812210938?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=On+the+array+processing+of+wind-farm+infrasound+signals&rft.au=Marcillo%2C+O%3BArrowsmith%2C+S+J%3BAnonymous&rft.aulast=Marcillo&rft.aufirst=O&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=732&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - arrays; detection; geophysical methods; harmonics; infrasound waves; seismic methods; signals; technology; wind energy ER - TY - JOUR T1 - Amplitude modeling in the explosion monitoring world AN - 1812210580; 2016-068136 JF - Seismological Research Letters AU - Phillips, W S AU - Fisk, M D AU - Stead, R J AU - Begnaud, M L AU - Yang, X AU - Ballard, S AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 652 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - upper mantle KW - monitoring KW - explosions KW - mantle KW - elastic waves KW - depth KW - signals KW - models KW - attenuation KW - Q KW - ground motion KW - earthquakes KW - crust KW - anisotropy KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812210580?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Amplitude+modeling+in+the+explosion+monitoring+world&rft.au=Phillips%2C+W+S%3BFisk%2C+M+D%3BStead%2C+R+J%3BBegnaud%2C+M+L%3BYang%2C+X%3BBallard%2C+S%3BAnonymous&rft.aulast=Phillips&rft.aufirst=W&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=652&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - amplitude; anisotropy; attenuation; crust; depth; earthquakes; elastic waves; explosions; ground motion; mantle; models; monitoring; Q; signals; upper mantle ER - TY - JOUR T1 - Detection of repeating earthquakes using the Cascadia initiative amphibious dataset AN - 1812210518; 2016-068525 JF - Seismological Research Letters AU - Morton, E A AU - Bilek, S L AU - Rowe, C A AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 731 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - East Pacific KW - technology KW - ocean bottom seismographs KW - Northeast Pacific KW - Cascadia Basin KW - seismographs KW - information management KW - data management KW - seismicity KW - North Pacific KW - Pacific Ocean KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812210518?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Detection+of+repeating+earthquakes+using+the+Cascadia+initiative+amphibious+dataset&rft.au=Morton%2C+E+A%3BBilek%2C+S+L%3BRowe%2C+C+A%3BAnonymous&rft.aulast=Morton&rft.aufirst=E&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=731&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Cascadia Basin; data management; earthquakes; East Pacific; information management; instruments; North Pacific; Northeast Pacific; ocean bottom seismographs; Pacific Ocean; seismicity; seismographs; technology ER - TY - JOUR T1 - An expanded feature set for regional seismic discrimination AN - 1807509599; 2016-066462 JF - Seismological Research Letters AU - Maccarthy, J K AU - Harste, H E AU - Anderson, D N AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 614 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - body waves KW - surface waves KW - seismicity KW - guided waves KW - classification KW - ground motion KW - elastic waves KW - seismic waves KW - earthquakes KW - Rayleigh waves KW - signals KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509599?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=An+expanded+feature+set+for+regional+seismic+discrimination&rft.au=Maccarthy%2C+J+K%3BHarste%2C+H+E%3BAnderson%2C+D+N%3BAnonymous&rft.aulast=Maccarthy&rft.aufirst=J&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=614&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - body waves; classification; earthquakes; elastic waves; ground motion; guided waves; Rayleigh waves; seismic waves; seismicity; signals; surface waves ER - TY - JOUR T1 - Coupling hydrodynamic and wave propagation modeling for waveform modeling of SPE AN - 1807509472; 2016-066458 JF - Seismological Research Letters AU - Larmat, Carene S AU - Steedman, D W AU - Rougier, E AU - Brandley, C AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 613 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - models KW - computer programs KW - underground cavities KW - seismicity KW - explosions KW - data processing KW - propagation KW - nuclear explosions KW - simulation KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509472?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Coupling+hydrodynamic+and+wave+propagation+modeling+for+waveform+modeling+of+SPE&rft.au=Larmat%2C+Carene+S%3BSteedman%2C+D+W%3BRougier%2C+E%3BBrandley%2C+C%3BAnonymous&rft.aulast=Larmat&rft.aufirst=Carene&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=613&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - computer programs; data processing; explosions; models; nuclear explosions; propagation; seismicity; simulation; underground cavities ER - TY - JOUR T1 - Fusing multiple geophysical signatures to detect small chemical explosions at local distances AN - 1807509167; 2016-066430 JF - Seismological Research Letters AU - Carmichael, Joshua D AU - Arrowsmith, S J AU - Nemzek, R J AU - Setnz, K AU - Anderson, D N AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 607 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - technology KW - monitoring KW - seismicity KW - explosions KW - chemical explosions KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509167?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Fusing+multiple+geophysical+signatures+to+detect+small+chemical+explosions+at+local+distances&rft.au=Carmichael%2C+Joshua+D%3BArrowsmith%2C+S+J%3BNemzek%2C+R+J%3BSetnz%2C+K%3BAnderson%2C+D+N%3BAnonymous&rft.aulast=Carmichael&rft.aufirst=Joshua&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=607&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - chemical explosions; explosions; monitoring; seismicity; technology ER - TY - JOUR T1 - Modeling near-source phenomenology with a novel visco-plastic continuum model and its implications on close-in seismic observables AN - 1807509108; 2016-066424 JF - Seismological Research Letters AU - Rougier, E AU - Knight, E E AU - Yang, X AU - Patton, H J AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 606 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - models KW - viscosity KW - underground space KW - seismicity KW - explosions KW - damage KW - propagation KW - focus KW - plasticity KW - earthquakes KW - rock mechanics KW - 30:Engineering geology KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509108?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Modeling+near-source+phenomenology+with+a+novel+visco-plastic+continuum+model+and+its+implications+on+close-in+seismic+observables&rft.au=Rougier%2C+E%3BKnight%2C+E+E%3BYang%2C+X%3BPatton%2C+H+J%3BAnonymous&rft.aulast=Rougier&rft.aufirst=E&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=606&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - damage; earthquakes; explosions; focus; models; plasticity; propagation; rock mechanics; seismicity; underground space; viscosity ER - TY - JOUR T1 - Regionalization based on receiver functions AN - 1807509104; 2016-066581 JF - Seismological Research Letters AU - Larmat, Carene S AU - Maceira, M AU - Romanowicz, Barbara A AU - Chai, C AU - Ammon, C J AU - He, R AU - Zhang, H AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 639 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - tomography KW - P-waves KW - body waves KW - receiver functions KW - technology KW - statistical analysis KW - elastic waves KW - cluster analysis KW - seismicity KW - Western U.S. KW - seismic waves KW - seismic networks KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509104?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Regionalization+based+on+receiver+functions&rft.au=Larmat%2C+Carene+S%3BMaceira%2C+M%3BRomanowicz%2C+Barbara+A%3BChai%2C+C%3BAmmon%2C+C+J%3BHe%2C+R%3BZhang%2C+H%3BAnonymous&rft.aulast=Larmat&rft.aufirst=Carene&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=639&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - body waves; cluster analysis; earthquakes; elastic waves; instruments; P-waves; receiver functions; seismic networks; seismic waves; seismicity; statistical analysis; technology; tomography; United States; Western U.S. ER - TY - JOUR T1 - Well log correlation of the Source Physics Experiment (SPE) phase I test bed AN - 1807508801; 2016-066453 JF - Seismological Research Letters AU - Snelson, C M AU - Coblentz, D AU - Townsend, M J AU - Prothro, L B AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 612 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - body waves KW - experimental studies KW - well logs KW - three-dimensional models KW - explosions KW - data processing KW - elastic waves KW - correlation KW - seismic response KW - rock mechanics KW - computer programs KW - Nevada Test Site KW - seismicity KW - ground motion KW - Yucca Flat KW - seismic waves KW - nuclear explosions KW - earthquakes KW - S-waves KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508801?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Well+log+correlation+of+the+Source+Physics+Experiment+%28SPE%29+phase+I+test+bed&rft.au=Snelson%2C+C+M%3BCoblentz%2C+D%3BTownsend%2C+M+J%3BProthro%2C+L+B%3BAnonymous&rft.aulast=Snelson&rft.aufirst=C&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=612&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; computer programs; correlation; data processing; earthquakes; elastic waves; experimental studies; explosions; ground motion; Nevada; Nevada Test Site; nuclear explosions; rock mechanics; S-waves; seismic response; seismic waves; seismicity; three-dimensional models; United States; well logs; Yucca Flat ER - TY - JOUR T1 - Developing path-dependent uncertainty estimates for use with the regional seismic travel time (Rstt) model AN - 1807508742; 2016-066587 JF - Seismological Research Letters AU - Begnaud, M L AU - Anderson, D N AU - Phillips, W S AU - Myers, S C AU - Ballard, S AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 640 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - tomography KW - models KW - seismicity KW - traveltime KW - elastic waves KW - uncertainty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508742?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Developing+path-dependent+uncertainty+estimates+for+use+with+the+regional+seismic+travel+time+%28Rstt%29+model&rft.au=Begnaud%2C+M+L%3BAnderson%2C+D+N%3BPhillips%2C+W+S%3BMyers%2C+S+C%3BBallard%2C+S%3BAnonymous&rft.aulast=Begnaud&rft.aufirst=M&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=640&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - elastic waves; models; seismicity; tomography; traveltime; uncertainty ER - TY - JOUR T1 - Shear release from explosive loading at a jointed test site AN - 1807508543; 2016-066425 JF - Seismological Research Letters AU - Steedman, D W AU - Bradley, C R AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 606 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - Nevada Test Site KW - Nevada National Security Site KW - seismicity KW - explosions KW - shear KW - propagation KW - simulation KW - Nye County Nevada KW - Nevada KW - rock mechanics KW - 30:Engineering geology KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508543?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Shear+release+from+explosive+loading+at+a+jointed+test+site&rft.au=Steedman%2C+D+W%3BBradley%2C+C+R%3BAnonymous&rft.aulast=Steedman&rft.aufirst=D&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=606&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - explosions; Nevada; Nevada National Security Site; Nevada Test Site; Nye County Nevada; propagation; rock mechanics; seismicity; shear; simulation; United States ER - TY - JOUR T1 - Seismic excitation and modeling of precarious rocks near Los Alamos, New Mexico AN - 1807508540; 2016-066500 JF - Seismological Research Letters AU - Menq, F AU - MacFarlane, E AU - Stokoe, K AU - Schultz-Fellenz, E AU - Lee, R AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 622 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - models KW - finite element analysis KW - technology KW - precarious rocks KW - seismicity KW - New Mexico KW - Los Alamos County New Mexico KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508540?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Seismic+excitation+and+modeling+of+precarious+rocks+near+Los+Alamos%2C+New+Mexico&rft.au=Menq%2C+F%3BMacFarlane%2C+E%3BStokoe%2C+K%3BSchultz-Fellenz%2C+E%3BLee%2C+R%3BAnonymous&rft.aulast=Menq&rft.aufirst=F&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=622&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - earthquakes; finite element analysis; instruments; Los Alamos County New Mexico; models; New Mexico; precarious rocks; seismicity; technology; United States ER - TY - JOUR T1 - Introducing PAsTA; a statistical framework for association of multi-phenomenologies AN - 1807508479; 2016-066454 JF - Seismological Research Letters AU - Euler, G g AU - Blom, P S AU - Arrowsmith, S J AU - Anderson, D N AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 612 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - seismicity KW - explosions KW - chemical explosions KW - statistical analysis KW - ground motion KW - New Mexico KW - Los Alamos County New Mexico KW - Los Alamos National Laboratory KW - earthquakes KW - cluster analysis KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508479?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Introducing+PAsTA%3B+a+statistical+framework+for+association+of+multi-phenomenologies&rft.au=Euler%2C+G+g%3BBlom%2C+P+S%3BArrowsmith%2C+S+J%3BAnderson%2C+D+N%3BAnonymous&rft.aulast=Euler&rft.aufirst=G&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=612&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - chemical explosions; cluster analysis; earthquakes; explosions; ground motion; Los Alamos County New Mexico; Los Alamos National Laboratory; New Mexico; seismicity; statistical analysis; United States ER - TY - JOUR T1 - Nonlinear dynamics induced in a structure by seismic and environmental loading AN - 1807508423; 2016-066419 JF - Seismological Research Letters AU - Gueguen, Philippe AU - Johnson, P A AU - Roux, Philippe AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 605 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - soil mechanics KW - strain KW - seismicity KW - dynamics KW - loading KW - elastic properties KW - damage KW - deformation KW - seismic response KW - earthquakes KW - structures KW - 30:Engineering geology KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508423?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Nonlinear+dynamics+induced+in+a+structure+by+seismic+and+environmental+loading&rft.au=Gueguen%2C+Philippe%3BJohnson%2C+P+A%3BRoux%2C+Philippe%3BAnonymous&rft.aulast=Gueguen&rft.aufirst=Philippe&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=605&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - damage; deformation; dynamics; earthquakes; elastic properties; loading; seismic response; seismicity; soil mechanics; strain; structures ER - TY - JOUR T1 - Upscaling diffusion and nonlinear reactive mass transport in homogeneous porous media AN - 1797533847; 2016-052523 AB - In this work, we revisit the upscaling process of diffusive mass transfer of a solute undergoing a homogeneous reaction in porous media using the method of volume averaging. For linear reaction rate kinetics, the upscaled model exhibits a vis-a-vis correspondence with the mass transfer governing equation at the microscale. When nonlinear reactions are present, other methods must be adopted to upscale the nonlinear term. In this work, we explore a linearization approach for the purpose of solving the associated closure problem. For large rates of nonlinear reaction relative to diffusion, the effective diffusion tensor is shown to be a function of the reaction rate, and this dependence is illustrated by both numerical and analytical means. This approach leads to a macroscale model that also has a similar structure as the microscale counterpart. The necessary conditions for the vis-a-vis correspondence are clearly identified. The validation of the macroscale model is carried out by comparison with pore-scale simulations of the microscale transport process. The predictions of both concentration profiles and effectiveness factors were found to be in acceptable agreement. In an appendix, we also briefly discuss an integral formulation of the nonlinear problem that may be useful in developing more accurate results for the upscaled transport and reaction equations; this approach requires computing the Green function corresponding to the linear transport problem. Copyright 2015 Springer Science+Business Media Dordrecht JF - Transport in Porous Media AU - Lugo-Mendez, Helen D AU - Valdes-Parada, Francisco J AU - Porter, Mark L AU - Wood, Brian D AU - Ochoa-Tapia, J Alberto Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 683 EP - 716 PB - Springer, Dordrecht VL - 107 IS - 3 SN - 0169-3913, 0169-3913 KW - solute transport KW - scale factor KW - concentration KW - diffusion KW - numerical models KW - solutes KW - fluid flow KW - porous materials KW - Green function KW - scale models KW - transport KW - volume KW - reactive transport KW - mass transfer KW - geochemistry KW - upscaling KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797533847?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transport+in+Porous+Media&rft.atitle=Upscaling+diffusion+and+nonlinear+reactive+mass+transport+in+homogeneous+porous+media&rft.au=Lugo-Mendez%2C+Helen+D%3BValdes-Parada%2C+Francisco+J%3BPorter%2C+Mark+L%3BWood%2C+Brian+D%3BOchoa-Tapia%2C+J+Alberto&rft.aulast=Lugo-Mendez&rft.aufirst=Helen&rft.date=2015-04-01&rft.volume=107&rft.issue=3&rft.spage=683&rft.isbn=&rft.btitle=&rft.title=Transport+in+Porous+Media&rft.issn=01693913&rft_id=info:doi/10.1007%2Fs11242-015-0462-4 L2 - http://springerlink.metapress.com/(l4tqdq55jga2hgb0achos1qm)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100342,1 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 68 N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2016-06-17 N1 - SubjectsTermNotLitGenreText - concentration; diffusion; fluid flow; geochemistry; Green function; mass transfer; numerical models; porous materials; reactive transport; scale factor; scale models; solute transport; solutes; transport; upscaling; volume DO - http://dx.doi.org/10.1007/s11242-015-0462-4 ER - TY - JOUR T1 - Impact of the Normalization Condition and Model Information on Evaluated Prompt Fission Neutron Spectra and Associated Uncertainties AN - 1770380048; PQ0002237216 AB - Low evaluated uncertainties compared to experimental information and a strong model impact were observed in some prompt fission neutron spectrum (PFNS) evaluations that include mean values and covariances stemming from a rigid model. Here, we show by studying the super(2)39u PFNS ENDF/B-VII.1 evaluation via generalized least-squares analyses that strong model correlations in combination with the normalization condition on the estimated PFNS and its covariances result in surprisingly low evaluated uncertainties. Furthermore, the model changes the evaluated results by >1[sigma] of combined experimental uncertainties near the average outgoing neutron energy (~2 MeV). We show both analytically and by means of representative numerical examples that the normalization condition on the spectrum and its covariances naturally leads to uncertainties reduced by a fully positively correlated scaling uncertainty JF - Nuclear Science and Engineering AU - Neudecker, D AU - Capote, R AU - Smith, D L AU - Burr, T AU - Talou, P AD - Los Alamos National Laboratory, Theoretical Division, T-2 Nuclear and Particle Physics, Astrophysics and Cosmology, Los Alamos, New Mexico dneudecker@lanl.gov Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 381 EP - 397 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 179 IS - 4 SN - 0029-5639, 0029-5639 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Stemming KW - Nuclear fission KW - Neutron spectra KW - Uncertainty KW - Mathematical models KW - Least squares method KW - Correlation analysis KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770380048?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Science+and+Engineering&rft.atitle=Impact+of+the+Normalization+Condition+and+Model+Information+on+Evaluated+Prompt+Fission+Neutron+Spectra+and+Associated+Uncertainties&rft.au=Neudecker%2C+D%3BCapote%2C+R%3BSmith%2C+D+L%3BBurr%2C+T%3BTalou%2C+P&rft.aulast=Neudecker&rft.aufirst=D&rft.date=2015-04-01&rft.volume=179&rft.issue=4&rft.spage=381&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/10.13182%2FNSE14-6 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Number of references - 45 N1 - Last updated - 2016-03-04 DO - http://dx.doi.org/10.13182/NSE14-6 ER - TY - JOUR T1 - Uranium transport in a crushed granodiorite; experiments and reactive transport modeling AN - 1756505615; 2016-006716 AB - The primary objective of this study was to develop and demonstrate an experimental method to refine and better parameterize process models for reactive contaminant transport in aqueous subsurface environments and to reduce conservatism in such models without attempting to fully describe the geochemical system. Uranium was used as an example of a moderately adsorbing contaminant because of its relevance in geologic disposal of spent nuclear fuel. A fractured granodiorite from the Grimsel Test Site (GTS) in Switzerland was selected because this system has been studied extensively and field experiments have been conducted with radionuclides including uranium. We evaluated the role of pH, porous media size fraction, and flow interruptions on uranium transport. Rock cores drilled from the GTS were shipped to Los Alamos National Laboratory, characterized by x-ray diffraction and optical microscopy, and used in uranium batch sorption and column breakthrough experiments. A synthetic water was prepared that represented the porewater that would be present after groundwater interacts with bentonite backfill material near a nuclear waste package. Uranium was conservatively transported at pH 8.8. Significant adsorption and subsequent desorption was observed at pH nearly equal 7, with long desorption tails resulting after switching the column injection solution to uranium-free groundwater. Our experiments were designed to better interrogate this slow desorption behavior. A three-site model predicted sorption rate constants for a pH 7.2 solution with a 75-150 mu m granodiorite fraction to be 3.5, 0.012, and 0.012 mL/g-h for the forward reactions and 0.49, 0.0025, and 0.001 h (super -1) for the reverse reactions. Surface site densities were 1.3, 0.042, and 0.042 mu mol/g for the first, second, and third sites, respectively. 10-year simulations show that including a slow binding site increases the arrival time of a uranium pulse by nearly equal 70%. Abstract Copyright (2015) Elsevier, B.V. JF - Journal of Contaminant Hydrology AU - Dittrich, T M AU - Reimus, P W Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 44 EP - 59 PB - Elsevier, Amsterdam VL - 175-176 SN - 0169-7722, 0169-7722 KW - solute transport KW - hazardous waste KW - crushed stone KW - sorption KW - desorption KW - X-ray diffraction data KW - isotopes KW - igneous rocks KW - Grimsel Test Site KW - mass spectra KW - power plants KW - Europe KW - simulation KW - Switzerland KW - reservoir rocks KW - radioactive waste KW - ground water KW - reactivity KW - sedimentary rocks KW - radioactive isotopes KW - plutonic rocks KW - major elements KW - transport KW - granodiorites KW - Central Europe KW - spectra KW - trace elements KW - water pollution KW - kinetics KW - pH KW - construction materials KW - PHREEQC KW - experimental studies KW - bentonite KW - pollutants KW - pollution KW - models KW - ICP mass spectra KW - nuclear energy KW - metals KW - reservoir properties KW - uranium KW - Bern Switzerland KW - waste disposal KW - clastic rocks KW - actinides KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756505615?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Contaminant+Hydrology&rft.atitle=Uranium+transport+in+a+crushed+granodiorite%3B+experiments+and+reactive+transport+modeling&rft.au=Dittrich%2C+T+M%3BReimus%2C+P+W&rft.aulast=Dittrich&rft.aufirst=T&rft.date=2015-04-01&rft.volume=175-176&rft.issue=&rft.spage=44&rft.isbn=&rft.btitle=&rft.title=Journal+of+Contaminant+Hydrology&rft.issn=01697722&rft_id=info:doi/10.1016%2Fj.jconhyd.2015.02.004 L2 - http://www.sciencedirect.com/science/journal/01697722 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 46 N1 - Document feature - illus. incl. 8 tables N1 - Last updated - 2016-01-14 N1 - SubjectsTermNotLitGenreText - actinides; bentonite; Bern Switzerland; Central Europe; clastic rocks; construction materials; crushed stone; desorption; Europe; experimental studies; granodiorites; Grimsel Test Site; ground water; hazardous waste; ICP mass spectra; igneous rocks; isotopes; kinetics; major elements; mass spectra; metals; models; nuclear energy; pH; PHREEQC; plutonic rocks; pollutants; pollution; power plants; radioactive isotopes; radioactive waste; reactivity; reservoir properties; reservoir rocks; sedimentary rocks; simulation; solute transport; sorption; spectra; Switzerland; trace elements; transport; uranium; waste disposal; water pollution; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.jconhyd.2015.02.004 ER - TY - JOUR T1 - Diffusion of Zr, Ru, Ce, Y, La, Sr and Ba fission products in U0 sub(2) AN - 1732838672; PQ0001495031 AB - The diffusivity of the solid fission products (FP) Zr (Zr super(4+)), Ru (Ru super(4+), Ru super(3+)), Ce (Ce super(4+)), Y (Y super(3+)), La (La super(3+)), Sr (Sr super(2+)) and Ba (Ba super(2+)) by a vacancy mechanism has been calculated, using a combination of density functional theory (DFT) and empirical potential (EP) calculations. The activation energies for the solid fission products are compared to the activation energy for Xe fission gas atoms calculated previously. Apart from Ru, the solid fission products all exhibit higher activation energy than Xe. For all solid FPs except Y super(3+), the migration of the FP has lower barrier than the migration of a neighboring U atom, making the latter the rate limiting step for direct migration. An indirect mechanism, consisting of two successive migrations around the FP, is also investigated. The calculated diffusivities show that most solid fission products diffuse with rates similar to U self-diffusion. However, Ru, Ba and Sr exhibit faster diffusion than the other solid FPs, with Ru super(3+) and Ru super(4+) diffusing even faster than Xe for T < 1200 K. The diffusivities correlate with the observed fission product solubility in UO sub(2), and the tendency to form metallic and oxide second phase inclusions. JF - Journal of Nuclear Materials AU - Perriot, R AU - Liu, X-Y AU - Stanek, C R AU - Andersson, D A AD - Materials Science and Technology Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, USA, rperriot@lanl.gov PY - 2015 SP - 90 EP - 96 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 459 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Fission products KW - Energy KW - Radioactive materials KW - Diffusion KW - Migration KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732838672?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Diffusion+of+Zr%2C+Ru%2C+Ce%2C+Y%2C+La%2C+Sr+and+Ba+fission+products+in+U0+sub%282%29&rft.au=Perriot%2C+R%3BLiu%2C+X-Y%3BStanek%2C+C+R%3BAndersson%2C+D+A&rft.aulast=Perriot&rft.aufirst=R&rft.date=2015-04-01&rft.volume=459&rft.issue=&rft.spage=90&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016.j.jnucmat.2015.01.001 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Number of references - 65 N1 - Last updated - 2015-12-09 N1 - SubjectsTermNotLitGenreText - Fission products; Energy; Radioactive materials; Diffusion; Migration DO - http://dx.doi.org/10.1016.j.jnucmat.2015.01.001 ER - TY - JOUR T1 - Synthesis, characterization and thermochemistry of Cs-, Rb- and Sr- substituted barium aluminium titanate hollandites AN - 1732831067; PQ0001495028 AB - Titanate hollandites are of considerable interest for immobilization of radioactive Cs, its daughter product Ba and related radionuclides Rb and Sr. In this study, we synthesized three hollandites, Ba sub(1.18)Cs sub(0.21) Al sub(2.44)Ti sub(5.53)O sub(16), Ba sub(1.17)Rb sub(0.19)Al sub(2.46)Ti sub(5.53)O sub(16) and Ba sub(1.14)Sr sub(0.10)Al sub(2.38)Ti sub(5.59)O sub(16), using sol-gel methods. Rietveld analysis of synchrotron XRD data shows that they adopt the tetragonal structure (space group I4/m), and their cell parameters increase with increasing cation size (Sr super(2+) [arrowright] Rb super(+) [arrowright] Cs super(+)). Standard enthalpies of formation of these hollandites were determined from drop solution calorimetric measurements with lead borate as the solvent at 973 K. Their formation enthalpies are similar, consistent with the occurrence of extensive cation substitutions in hollandites. Further energetic analysis with respect to BaTiO sub(3) and SiTiO sub(3) perovskites and other oxides reveals decreased thermodynamic stability from Cs- to Rb- to Sr-hollandite. This trend is consistent with the phase assemblage observed in Synroc, where Cs super(+), Rb super(+) and Ba super(2+) enter into hollandite, whereas Sr super(2+) occurs in perovskite. JF - Journal of Nuclear Materials AU - Xu, H AU - Wu, L AU - Zhu, J AU - Navrotsky, A AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, hxu@lanl.gov PY - 2015 SP - 70 EP - 76 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 459 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Cations KW - Thermodynamics KW - Barium KW - Aluminum KW - Radioactive materials KW - Solvents KW - Radioisotopes KW - Lead KW - ENA 14:Radiological Contamination UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732831067?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Synthesis%2C+characterization+and+thermochemistry+of+Cs-%2C+Rb-+and+Sr-+substituted+barium+aluminium+titanate+hollandites&rft.au=Xu%2C+H%3BWu%2C+L%3BZhu%2C+J%3BNavrotsky%2C+A&rft.aulast=Xu&rft.aufirst=H&rft.date=2015-04-01&rft.volume=459&rft.issue=&rft.spage=70&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2015.01.014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Number of references - 43 N1 - Last updated - 2015-12-09 N1 - SubjectsTermNotLitGenreText - Thermodynamics; Cations; Barium; Radioactive materials; Aluminum; Radioisotopes; Solvents; Lead DO - http://dx.doi.org/10.1016/j.jnucmat.2015.01.014 ER - TY - JOUR T1 - Chemical hydrogen storage material property guidelines for automotive applications AN - 1718919458; PQ0001788577 AB - Chemical hydrogen storage is the sought after hydrogen storage media for automotive applications because of the expected low pressure operation (0.05 kg H sub(2)/kg sub(system)), and system volumetric capacities (>0.05 kg H sub(2)/L sub(system)). Currently, the primary shortcomings of chemical hydrogen storage are regeneration efficiency, fuel cost and fuel phase (i.e., solid or slurry phase). Understanding the required material properties to meet the DOE Technical Targets for Onboard Hydrogen Storage Systems is a critical knowledge gap in the hydrogen storage research community. This study presents a set of fluid-phase chemical hydrogen storage material property guidelines for automotive applications meeting the 2017 DOE technical targets. Viable material properties were determined using a boiler-plate automotive system design. The fluid-phase chemical hydrogen storage media considered in this study were neat liquids, solutions, and non-settling homogeneous slurries. Material properties examined include kinetics, heats of reaction, fuel-cell impurities, gravimetric and volumetric hydrogen storage capacities, and regeneration efficiency. The material properties, although not exhaustive, are an essential first step in identifying viable chemical hydrogen storage material properties-and most important, their implications on system mass, system volume and system performance. JF - Journal of Power Sources AU - Semelsberger, Troy A AU - Brooks, Kriston P AD - Materials Physics and Applications Division, Los Alamos National Laboratory, P.O. Box 1663, Mail Stop K763, Los Alamos, NM 87545, USA Y1 - 2015/04/01/ PY - 2015 DA - 2015 Apr 01 SP - 593 EP - 609 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 279 SN - 0378-7753, 0378-7753 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Chemical hydrogen storage KW - Fuel cells KW - Hydrogen KW - Material properties KW - Chemical hydrides KW - Hydrogen storage materials KW - Hydrogen storage KW - Media KW - Automotive components KW - Slurries KW - Regeneration KW - Guidelines KW - Gravimeters UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718919458?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=Chemical+hydrogen+storage+material+property+guidelines+for+automotive+applications&rft.au=Semelsberger%2C+Troy+A%3BBrooks%2C+Kriston+P&rft.aulast=Semelsberger&rft.aufirst=Troy&rft.date=2015-04-01&rft.volume=279&rft.issue=&rft.spage=593&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/10.1016%2Fj.jpowsour.2015.01.040 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-10-01 N1 - Last updated - 2015-12-07 DO - http://dx.doi.org/10.1016/j.jpowsour.2015.01.040 ER - TY - JOUR T1 - Siderophile and chalcophile element abundances in shergottites; implications for Martian core formation AN - 1700098372; 2015-073223 AB - Elemental abundances for volatile siderophile and chalcophile elements for Mars inform us about processes of accretion and core formation. Such data are few for Martian meteorites, and are often lacking in the growing number of desert finds. In this study, we employed laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) to analyze polished slabs of 15 Martian meteorites for the abundances of about 70 elements. This technique has high sensitivity, excellent precision, and is generally accurate as determined by comparisons of elements for which literature abundances are known. However, in some meteorites, the analyzed surface is not representative of the bulk composition due to the over- or underrepresentation of a key host mineral, e.g., phosphate for rare earth elements (REE). For other meteorites, the range of variation in bulk rastered analyses of REE is within the range of variation reported among bulk REE analyses in the literature. An unexpected benefit has been the determination of the abundances of Ir and Os with a precision and accuracy comparable to the isotope dilution technique. Overall, the speed and small sample consumption afforded by this technique makes it an important tool widely applicable to small or rare meteorites for which a polished sample was prepared. The new volatile siderophile and chalcophile element abundances have been employed to determine Ge and Sb abundances, and revise Zn, As, and Bi abundances for the Martian mantle. The new estimates of Martian mantle composition support core formation at intermediate pressures (14 + or - 3 GPa) in a magma ocean on Mars. Abstract Copyright The Meteoritical Society, 2015. JF - Meteoritics & Planetary Science AU - Yang, Shuying AU - Humayun, Munir AU - Righter, Kevin AU - Jefferson, Gwendolyn AU - Fields, Dana AU - Irving, Anthony J Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 691 EP - 714 PB - Meteoritical Society, Fayetteville, AR VL - 50 IS - 4 SN - 1086-9379, 1086-9379 KW - zinc KW - stony meteorites KW - Martian meteorites KW - bismuth KW - mass spectra KW - mantle KW - Mars KW - platinum group KW - iridium KW - SNC Meteorites KW - meteorites KW - spectra KW - rare earths KW - chemical composition KW - magma oceans KW - antimony KW - accretion KW - pressure KW - arsenic KW - siderophile elements KW - achondrites KW - terrestrial planets KW - isotope dilution KW - ICP mass spectra KW - planets KW - volatiles KW - shergottite KW - metals KW - germanium KW - osmium KW - core KW - chalcophile elements KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700098372?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Meteoritics+%26+Planetary+Science&rft.atitle=Siderophile+and+chalcophile+element+abundances+in+shergottites%3B+implications+for+Martian+core+formation&rft.au=Yang%2C+Shuying%3BHumayun%2C+Munir%3BRighter%2C+Kevin%3BJefferson%2C+Gwendolyn%3BFields%2C+Dana%3BIrving%2C+Anthony+J&rft.aulast=Yang&rft.aufirst=Shuying&rft.date=2015-04-01&rft.volume=50&rft.issue=4&rft.spage=691&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12384 L2 - http://cavern.uark.edu/~meteor/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 104 N1 - PubXState - AR N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-07-30 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - accretion; achondrites; antimony; arsenic; bismuth; chalcophile elements; chemical composition; core; germanium; ICP mass spectra; iridium; isotope dilution; magma oceans; mantle; Mars; Martian meteorites; mass spectra; metals; meteorites; osmium; planets; platinum group; pressure; rare earths; shergottite; siderophile elements; SNC Meteorites; spectra; stony meteorites; terrestrial planets; volatiles; zinc DO - http://dx.doi.org/10.1111/maps.12384 ER - TY - JOUR T1 - Concurrent determination of (super 237) Np and Pu isotopes using ICP-MS; analysis of NIST environmental matrix standard reference materials 4357, 1646a, and 2702 AN - 1692742525; 2015-060377 AB - An optimized method was developed to analyze environmental soil and sediment samples for (super 237) Np, (super 239) Pu, and (super 240) Pu by ICP-MS using a (super 242) Pu isotope dilution standard. The high yield, short time frame required for analysis, and the commercial availability of the (super 242) Pu tracer are significant advantages of the method. Control experiments designed to assess method uncertainty, including variation in inter-element fractionation that occurs during the purification protocol, suggest that the overall precision for measurements of (super 237) Np is typically on the order of + or -5%. Measurements of the (super 237) Np concentration in a Peruvian Soil blank (NIST SRM 4355) spiked with a known concentration of (super 237) Np tracer confirmed the accuracy of the method, agreeing well with the expected value. The method has been used to determine neptunium and plutonium concentrations in several environmental matrix standard reference materials available from NIST: SRM 4357 (Radioactivity Standard), SRM 1646a (Estuarine Sediment) and SRM 2702 (Inorganics in Marine Sediment). Abstract Copyright (2015) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Matteson, Brent S AU - Hanson, Susan K AU - Miller, Jeffrey L AU - Oldham, Warren J, Jr Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 62 EP - 67 PB - Elsevier, Oxford VL - 142 SN - 0265-931X, 0265-931X KW - United States KW - NIST KW - neptunium KW - geologic hazards KW - isotopes KW - radioactivity KW - plutonium KW - Pu-239 KW - government agencies KW - National Institute of Standards and Technology KW - mass spectra KW - environmental management KW - radioactive isotopes KW - standard materials KW - sediments KW - data bases KW - Peru KW - spectra KW - chemical analysis KW - Np-237 KW - pollutants KW - pollution KW - measurement KW - ICP mass spectra KW - South America KW - soil pollution KW - metals KW - mathematical methods KW - natural hazards KW - actinides KW - Pu-240 KW - 02C:Geochemistry of rocks, soils, and sediments KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742525?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Environmental+Radioactivity&rft.atitle=Concurrent+determination+of+%28super+237%29+Np+and+Pu+isotopes+using+ICP-MS%3B+analysis+of+NIST+environmental+matrix+standard+reference+materials+4357%2C+1646a%2C+and+2702&rft.au=Matteson%2C+Brent+S%3BHanson%2C+Susan+K%3BMiller%2C+Jeffrey+L%3BOldham%2C+Warren+J%2C+Jr&rft.aulast=Matteson&rft.aufirst=Brent&rft.date=2015-04-01&rft.volume=142&rft.issue=&rft.spage=62&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2015.01.007 L2 - http://www.sciencedirect.com/science/journal/0265931X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 23 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-07-02 N1 - SubjectsTermNotLitGenreText - actinides; chemical analysis; data bases; environmental management; geologic hazards; government agencies; ICP mass spectra; isotopes; mass spectra; mathematical methods; measurement; metals; National Institute of Standards and Technology; natural hazards; neptunium; NIST; Np-237; Peru; plutonium; pollutants; pollution; Pu-239; Pu-240; radioactive isotopes; radioactivity; sediments; soil pollution; South America; spectra; standard materials; United States DO - http://dx.doi.org/10.1016/j.jenvrad.2015.01.007 ER - TY - JOUR T1 - Keeping Enceladus warm AN - 1692741797; 2015-060383 AB - Despite its small size, Enceladus emits considerable heat, especially at its south pole, even long after simple thermal models predict it should be frozen. Several sources of energy have been proposed as responsible for this heating, such as tidal dissipative heating (TDH), convection and shearing in the ice shell, and exothermic chemical reactions (e.g., serpentine formation). Crater relaxation simulations suggest that episodic heating events have occurred over long stretches of Enceladus' history. Thermal history and hydrothermal simulations reported here show that a combination of steady plus episodic TDH heating could maintain at least a polar ocean to the present time. Hydrothermal circulation can play a significant role in mining Enceladus' internal heat, facilitating the persistence of an ocean even to the present by focusing internal heat to the polar regions. JF - Icarus AU - Travis, B J AU - Schubert, G Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 32 EP - 42 PB - Elsevier, New York, NY VL - 250 SN - 0019-1035, 0019-1035 KW - water KW - icy satellites KW - polar regions KW - numerical models KW - impact features KW - thermal conductivity KW - fluid flow KW - thermal history KW - simulation KW - ice shell KW - hydrothermal conditions KW - gravity field KW - Cassini-Huygens Mission KW - heat flow KW - planetary interiors KW - heating KW - impact craters KW - core KW - Enceladus Satellite KW - satellites KW - permeability KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692741797?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=Keeping+Enceladus+warm&rft.au=Travis%2C+B+J%3BSchubert%2C+G&rft.aulast=Travis&rft.aufirst=B&rft.date=2015-04-01&rft.volume=250&rft.issue=&rft.spage=32&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.11.017 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 52 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-07-02 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - Cassini-Huygens Mission; core; Enceladus Satellite; fluid flow; gravity field; heat flow; heating; hydrothermal conditions; ice shell; icy satellites; impact craters; impact features; numerical models; permeability; planetary interiors; polar regions; satellites; simulation; thermal conductivity; thermal history; water DO - http://dx.doi.org/10.1016/j.icarus.2014.11.017 ER - TY - JOUR T1 - Global sensitivity analysis in hydrological modeling; review of concepts, methods, theoretical framework, and applications AN - 1680751629; 2015-041772 AB - Sensitivity analysis (SA) aims to identify the key parameters that affect model performance and it plays important roles in model parameterization, calibration, optimization, and uncertainty quantification. However, the increasing complexity of hydrological models means that a large number of parameters need to be estimated. To better understand how these complex models work, efficient SA methods should be applied before the application of hydrological modeling. This study provides a comprehensive review of global SA methods in the field of hydrological modeling. The common definitions of SA and the typical categories of SA methods are described. A wide variety of global SA methods have been introduced to provide a more efficient evaluation framework for hydrological modeling. We review, analyze, and categorize research into global SA methods and their applications, with an emphasis on the research accomplished in the hydrological modeling field. The advantages and disadvantages are also discussed and summarized. An application framework and the typical practical steps involved in SA for hydrological modeling are outlined. Further discussions cover several important and often overlooked topics, including the relationship between parameter identification, uncertainty analysis, and optimization in hydrological modeling, how to deal with correlated parameters, and time-varying SA. Finally, some conclusions and guidance recommendations on SA in hydrological modeling are provided, as well as a list of important future research directions that may facilitate more robust analyses when assessing hydrological modeling performance. Abstract Copyright (2015) Elsevier, B.V. JF - Journal of Hydrology AU - Song, Xiaomeng AU - Zhang, Jianyun AU - Zhan, Chesheng AU - Xuan, Yunqing AU - Ye, Ming AU - Xu, Chonggang Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 739 EP - 757 PB - Elsevier, Amsterdam VL - 523 SN - 0022-1694, 0022-1694 KW - hydrology KW - variance analysis KW - statistical analysis KW - data processing KW - optimization KW - calibration KW - models KW - sensitivity analysis KW - mathematical methods KW - classification KW - uncertainty KW - regression analysis KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680751629?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology&rft.atitle=Global+sensitivity+analysis+in+hydrological+modeling%3B+review+of+concepts%2C+methods%2C+theoretical+framework%2C+and+applications&rft.au=Song%2C+Xiaomeng%3BZhang%2C+Jianyun%3BZhan%2C+Chesheng%3BXuan%2C+Yunqing%3BYe%2C+Ming%3BXu%2C+Chonggang&rft.aulast=Song&rft.aufirst=Xiaomeng&rft.date=2015-04-01&rft.volume=523&rft.issue=&rft.spage=739&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2015.02.013 L2 - http://www.sciencedirect.com/science/journal/00221694 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 120 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-10-25 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - calibration; classification; data processing; hydrology; mathematical methods; models; optimization; regression analysis; sensitivity analysis; statistical analysis; uncertainty; variance analysis DO - http://dx.doi.org/10.1016/j.jhydrol.2015.02.013 ER - TY - JOUR T1 - Total neutron emission generation and characterization for a Next Generation Safeguards Initiative spent fuel library AN - 1680452387; PQ0001453593 AB - This paper details both a methodology for generating the spatially dependent gross neutron emission (GNE) as well as a characterization of the GNE for a particular NGSI SFL for two different shuffle patterns. The GNE was characterized by examining three major components: (1) the total neutron emission; (2) the ([alpha], n) and spontaneous fission emissions; and (3) the main contributors to the spontaneous fission and ([alpha], n) emission signals. The total neutron emission was characterized by looking at two different shuffle patterns and using three different pin analysis techniques. These characterizations provide a large set of data with integral values (cooling time vs emission and burnup vs emission) and derivative values (isotopic percent composition) with visual depiction and detailed explanation. This study also shows that the information which can be obtained from the GNE depends upon how the information is grouped and analyzed. JF - Progress in Nuclear Energy AU - Weldon, R A, Jr AU - Fensin, M L AU - Trellue, H R AD - Los Alamos National Laboratory, USA Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 45 EP - 73 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 80 SN - 0149-1970, 0149-1970 KW - Environment Abstracts KW - Total neutron emission KW - Spent fuel characterization KW - NGSI KW - MCNP KW - Fuels KW - Nuclear fuels KW - Emissions KW - Nuclear energy KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680452387?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Progress+in+Nuclear+Energy&rft.atitle=Total+neutron+emission+generation+and+characterization+for+a+Next+Generation+Safeguards+Initiative+spent+fuel+library&rft.au=Weldon%2C+R+A%2C+Jr%3BFensin%2C+M+L%3BTrellue%2C+H+R&rft.aulast=Weldon&rft.aufirst=R&rft.date=2015-04-01&rft.volume=80&rft.issue=&rft.spage=45&rft.isbn=&rft.btitle=&rft.title=Progress+in+Nuclear+Energy&rft.issn=01491970&rft_id=info:doi/10.1016%2Fj.pnucene.2014.10.012 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-05-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Fuels; Nuclear fuels; Emissions; Nuclear energy DO - http://dx.doi.org/10.1016/j.pnucene.2014.10.012 ER - TY - JOUR T1 - Microtopographic and depth controls on active layer chemistry in Arctic polygonal ground AN - 1703689886; 2015-078635 AB - Polygonal ground is a signature characteristic of Arctic lowlands, and carbon release from permafrost thaw can alter feedbacks to Arctic ecosystems and climate. This study describes the first comprehensive spatial examination of active layer biogeochemistry that extends across high- and low-centered, ice wedge polygons, their features, and with depth. Water chemistry measurements of 54 analytes were made on surface and active layer pore waters collected near Barrow, Alaska, USA. Significant differences were observed between high- and low-centered polygons suggesting that polygon types may be useful for landscape-scale geochemical classification. However, differences were found for polygon features (centers and troughs) for analytes that were not significant for polygon type, suggesting that finer-scale features affect biogeochemistry differently from polygon types. Depth variations were also significant, demonstrating important multidimensional aspects of polygonal ground biogeochemistry. These results have major implications for understanding how polygonal ground ecosystems function, and how they may respond to future change. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Newman, B D AU - Throckmorton, H M AU - Graham, D E AU - Gu, B AU - Hubbard, S S AU - Liang, L AU - Wu, Y AU - Heikoop, J M AU - Herndon, E M AU - Phelps, T J AU - Wilson, C J AU - Wullschleger, S D Y1 - 2015/03/28/ PY - 2015 DA - 2015 Mar 28 SP - 1808 EP - 1817 PB - American Geophysical Union, Washington, DC VL - 42 IS - 6 SN - 0094-8276, 0094-8276 KW - United States KW - permafrost KW - North Slope KW - periglacial features KW - ice wedges KW - thawing KW - climate change KW - Barrow Alaska KW - topography KW - climate effects KW - Alaska KW - glacial geology KW - geomorphology KW - active layer KW - patterned ground KW - polygons KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703689886?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Microtopographic+and+depth+controls+on+active+layer+chemistry+in+Arctic+polygonal+ground&rft.au=Newman%2C+B+D%3BThrockmorton%2C+H+M%3BGraham%2C+D+E%3BGu%2C+B%3BHubbard%2C+S+S%3BLiang%2C+L%3BWu%2C+Y%3BHeikoop%2C+J+M%3BHerndon%2C+E+M%3BPhelps%2C+T+J%3BWilson%2C+C+J%3BWullschleger%2C+S+D&rft.aulast=Newman&rft.aufirst=B&rft.date=2015-03-28&rft.volume=42&rft.issue=6&rft.spage=1808&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL062804 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2015-08-13 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - active layer; Alaska; Barrow Alaska; climate change; climate effects; geomorphology; glacial geology; ice wedges; North Slope; patterned ground; periglacial features; permafrost; polygons; thawing; topography; United States DO - http://dx.doi.org/10.1002/2014GL062804 ER - TY - JOUR T1 - Activity of N-coordinated multi-metal-atom active site structures for Pt-free oxygen reduction reaction catalysis: role of *OH ligands. AN - 1665117396; 25788358 AB - We report calculated oxygen reduction reaction energy pathways on multi-metal-atom structures that have previously been shown to be thermodynamically favorable. We predict that such sites have the ability to spontaneously cleave the O2 bond and then will proceed to over-bind reaction intermediates. In particular, the *OH bound state has lower energy than the final 2 H2O state at positive potentials. Contrary to traditional surface catalysts, this *OH binding does not poison the multi-metal-atom site but acts as a modifying ligand that will spontaneously form in aqueous environments leading to new active sites that have higher catalytic activities. These *OH bound structures have the highest calculated activity to date. JF - Scientific reports AU - Holby, Edward F AU - Taylor, Christopher D AD - Los Alamos National Laboratory, Materials Science and Technology Division, Los Alamos, NM, 87545 USA. ; 1] DNV GL, Strategic Research &Innovation, Dublin, OH 43017 USA [2] Fontana Corrosion Center, Dept. of Materials Science &Engineering, The Ohio State University, Columbus, OH 43210 USA. Y1 - 2015/03/19/ PY - 2015 DA - 2015 Mar 19 SP - 9286 VL - 5 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665117396?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Scientific+reports&rft.atitle=Activity+of+N-coordinated+multi-metal-atom+active+site+structures+for+Pt-free+oxygen+reduction+reaction+catalysis%3A+role+of+*OH+ligands.&rft.au=Holby%2C+Edward+F%3BTaylor%2C+Christopher+D&rft.aulast=Holby&rft.aufirst=Edward&rft.date=2015-03-19&rft.volume=5&rft.issue=&rft.spage=9286&rft.isbn=&rft.btitle=&rft.title=Scientific+reports&rft.issn=2045-2322&rft_id=info:doi/10.1038%2Fsrep09286 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-06-04 N1 - Date created - 2015-03-19 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Nat Chem. 2009 Apr;1(1):37-46 [21378799] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/srep09286 ER - TY - CPAPER T1 - Comparative metatranscriptomics of soil fungal and bacterial communities in temperate forests and arid grasslands T2 - 28th Fungal Genetics Conference AN - 1684407732; 6349000 JF - 28th Fungal Genetics Conference AU - Hesse, Cedar AU - Steven, Blaire AU - Gallegos-Graves, LaVerne AU - Kuske, Cheryl Y1 - 2015/03/17/ PY - 2015 DA - 2015 Mar 17 KW - Grasslands KW - Forests KW - Soil microorganisms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1684407732?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=28th+Fungal+Genetics+Conference&rft.atitle=Comparative+metatranscriptomics+of+soil+fungal+and+bacterial+communities+in+temperate+forests+and+arid+grasslands&rft.au=Hesse%2C+Cedar%3BSteven%2C+Blaire%3BGallegos-Graves%2C+LaVerne%3BKuske%2C+Cheryl&rft.aulast=Hesse&rft.aufirst=Cedar&rft.date=2015-03-17&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=28th+Fungal+Genetics+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.genetics-gsa.org/fungal/2015/pages/sessionlisting.shtml LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-05-29 N1 - Last updated - 2015-06-01 ER - TY - JOUR T1 - Understanding the signature of rock coatings in laser-induced breakdown spectroscopy data AN - 1689591602; 2015-057186 AB - Surface compositional features on rocks such as coatings and weathering rinds provide important information about past aqueous environments and water-rock interactions. The search for these features represents an important aspect of the Curiosity rover mission. With its unique ability to do fine-scale chemical depth profiling, the ChemCam laser-induced breakdown spectroscopy instrument (LIBS) onboard Curiosity can be used to both identify and analyze rock surface alteration features. In this study we analyze a terrestrial manganese-rich rock varnish coating on a basalt rock in the laboratory with the ChemCam engineering model to determine the LIBS signature of a natural rock coating. Results show that there is a systematic decrease in peak heights for elements such as Mn that are abundant in the coating but not the rock. There is significant spatial variation in the relative abundance of coating elements detected by LIBS depending on where on the rock surface sampled; this is due to the variability in thickness and spatial discontinuities in the coating. Similar trends have been identified in some martian rock targets in ChemCam data, suggesting that these rocks may have coatings or weathering rinds on their surfaces. JF - Icarus AU - Lanza, Nina L AU - Ollila, Ann M AU - Cousin, Agnes AU - Wiens, Roger C AU - Clegg, Samuel AU - Mangold, Nicolas AU - Bridges, Nathan T AU - Cooper, Daniel AU - Schmidt, Mariek AU - Berger, Jeffrey A AU - Arvidson, Raymond AU - Melikechi, Noureddine AU - Newsom, Horton E AU - Tokar, Robert AU - Hardgrove, Craig AU - Mezzacappa, Alissa AU - Jackson, Ryan S AU - Clark, Benton AU - Forni, Olivier AU - Maurice, Sylvestre AU - Nachon, Marion AU - Anderson, Ryan B AU - Blank, Jennifer AU - Deans, Matthew AU - Delapp, Dorothea AU - Leveille, Richard AU - McInroy, Rhonda AU - Martinez, Ronald AU - Meslin, Pierre-Yves AU - Pinet, Patrick Y1 - 2015/03/15/ PY - 2015 DA - 2015 Mar 15 SP - 62 EP - 73 PB - Elsevier, New York, NY VL - 249 SN - 0019-1035, 0019-1035 KW - alteration KW - experimental studies KW - minor elements KW - weathering rinds KW - Mars KW - manganese KW - depth KW - Gale Crater KW - emission spectra KW - terrestrial planets KW - planets KW - laboratory studies KW - spatial variations KW - paleoenvironment KW - water-rock interaction KW - metals KW - rock varnish KW - Curiosity Rover KW - LIBS spectra KW - ChemCam KW - spectra KW - trace elements KW - rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591602?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=Understanding+the+signature+of+rock+coatings+in+laser-induced+breakdown+spectroscopy+data&rft.au=Lanza%2C+Nina+L%3BOllila%2C+Ann+M%3BCousin%2C+Agnes%3BWiens%2C+Roger+C%3BClegg%2C+Samuel%3BMangold%2C+Nicolas%3BBridges%2C+Nathan+T%3BCooper%2C+Daniel%3BSchmidt%2C+Mariek%3BBerger%2C+Jeffrey+A%3BArvidson%2C+Raymond%3BMelikechi%2C+Noureddine%3BNewsom%2C+Horton+E%3BTokar%2C+Robert%3BHardgrove%2C+Craig%3BMezzacappa%2C+Alissa%3BJackson%2C+Ryan+S%3BClark%2C+Benton%3BForni%2C+Olivier%3BMaurice%2C+Sylvestre%3BNachon%2C+Marion%3BAnderson%2C+Ryan+B%3BBlank%2C+Jennifer%3BDeans%2C+Matthew%3BDelapp%2C+Dorothea%3BLeveille%2C+Richard%3BMcInroy%2C+Rhonda%3BMartinez%2C+Ronald%3BMeslin%2C+Pierre-Yves%3BPinet%2C+Patrick&rft.aulast=Lanza&rft.aufirst=Nina&rft.date=2015-03-15&rft.volume=249&rft.issue=&rft.spage=62&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.05.038 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 44 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-06-18 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - alteration; ChemCam; Curiosity Rover; depth; emission spectra; experimental studies; Gale Crater; laboratory studies; LIBS spectra; manganese; Mars; metals; minor elements; paleoenvironment; planets; rock varnish; rocks; spatial variations; spectra; terrestrial planets; trace elements; water-rock interaction; weathering rinds DO - http://dx.doi.org/10.1016/j.icarus.2014.05.038 ER - TY - JOUR T1 - Gale Crater and impact processes; Curiosity's first 364 sols on Mars AN - 1689591496; 2015-057189 AB - Impact processes at all scales have been involved in the formation and subsequent evolution of Gale crater. Small impact craters in the vicinity of the Curiosity MSL landing site and rover traverse during the 364 Sols after landing have been studied both from orbit and the surface. Evidence for the effect of impacts on basement outcrops may include loose blocks of sandstone and conglomerate, and disrupted (fractured) sedimentary layers, which are not obviously displaced by erosion. Impact ejecta blankets are likely to be present, but in the absence of distinct glass or impact melt phases are difficult to distinguish from sedimentary/volcaniclastic breccia and conglomerate deposits. The occurrence of individual blocks with diverse petrological characteristics, including igneous textures, have been identified across the surface of Bradbury Rise, and some of these blocks may represent distal ejecta from larger craters in the vicinity of Gale. Distal ejecta may also occur in the form of impact spherules identified in the sediments and drift material. Possible examples of impactites in the form of shatter cones, shocked rocks, and ropy textured fragments of materials that may have been molten have been observed, but cannot be uniquely confirmed. Modification by aeolian processes of craters smaller than 40 m in diameter observed in this study, are indicated by erosion of crater rims, and infill of craters with aeolian and airfall dust deposits. Estimates for resurfacing suggest that craters less than 15 m in diameter may represent steady state between production and destruction. The smallest candidate impact crater observed is approximately 0.6 m in diameter. The observed crater record and other data are consistent with a resurfacing rate of the order of 10 mm/Myr; considerably greater than the rate from impact cratering alone, but remarkably lower than terrestrial erosion rates. JF - Icarus AU - Newsom, Horton E AU - Mangold, Nicolas AU - Kah, Linda C AU - Williams, Joshua M AU - Arvidson, Ray E AU - Stein, Nathan AU - Ollila, Ann M AU - Bridges, John C AU - Schwenzer, Susanne P AU - King, Penelope L AU - Grant, John A AU - Pinet, Patrick AU - Bridges, Nathan T AU - Calef, Fred, III AU - Wiens, Roger C AU - Spray, John G AU - Vaniman, David T AU - Elston, Wolf E AU - Berger, Jeffrey A AU - Garvin, James B AU - Palucis, Marisa C Y1 - 2015/03/15/ PY - 2015 DA - 2015 Mar 15 SP - 108 EP - 128 PB - Elsevier, New York, NY VL - 249 SN - 0019-1035, 0019-1035 KW - fractured materials KW - cratering KW - impact features KW - igneous rocks KW - resurfacing KW - sandstone KW - Mars KW - erosion rates KW - Gale Crater KW - sedimentary rocks KW - metamorphic rocks KW - Curiosity Rover KW - spherules KW - soils KW - Peace Vallis KW - impactites KW - textures KW - shatter cones KW - impacts KW - ejecta KW - conglomerate KW - terrestrial planets KW - planets KW - cryptoexplosion features KW - impact craters KW - clastic rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591496?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=Gale+Crater+and+impact+processes%3B+Curiosity%27s+first+364+sols+on+Mars&rft.au=Newsom%2C+Horton+E%3BMangold%2C+Nicolas%3BKah%2C+Linda+C%3BWilliams%2C+Joshua+M%3BArvidson%2C+Ray+E%3BStein%2C+Nathan%3BOllila%2C+Ann+M%3BBridges%2C+John+C%3BSchwenzer%2C+Susanne+P%3BKing%2C+Penelope+L%3BGrant%2C+John+A%3BPinet%2C+Patrick%3BBridges%2C+Nathan+T%3BCalef%2C+Fred%2C+III%3BWiens%2C+Roger+C%3BSpray%2C+John+G%3BVaniman%2C+David+T%3BElston%2C+Wolf+E%3BBerger%2C+Jeffrey+A%3BGarvin%2C+James+B%3BPalucis%2C+Marisa+C&rft.aulast=Newsom&rft.aufirst=Horton&rft.date=2015-03-15&rft.volume=249&rft.issue=&rft.spage=108&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.10.013 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 126 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-10-15 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - clastic rocks; conglomerate; cratering; cryptoexplosion features; Curiosity Rover; ejecta; erosion rates; fractured materials; Gale Crater; igneous rocks; impact craters; impact features; impactites; impacts; Mars; metamorphic rocks; Peace Vallis; planets; resurfacing; sandstone; sedimentary rocks; shatter cones; soils; spherules; terrestrial planets; textures DO - http://dx.doi.org/10.1016/j.icarus.2014.10.013 ER - TY - JOUR T1 - The ChemCam remote micro-imager at Gale Crater; review of the first year of operations on Mars AN - 1689591360; 2015-057188 AB - The Mars Science Laboratory rover, 'Curiosity' landed near the base of a 5 km-high mound of layered material in Gale crater. Mounted on the rover mast, the ChemCam instrument is designed to remotely determine the composition of soils and rocks located a few meters from the rover, using a Laser-Induced Breakdown Spectrometer (LIBS) coupled to a Remote Micro-Imager (RMI). We provide an overview of the diverse imaging investigations that were carried out by ChemCam's RMI during the first year of operation on Mars. 1182 individual panchromatic RMI images were acquired from Sol 10 to Sol 360 to document the ChemCam LIBS measurements and to characterize soils, rocks and rover hardware. We show several types of derived imaging products, including mosaics of images taken before and after laser shots, difference images to enhance the most subtle laser pits, merges with color Mastcam-100 images, micro-topography using the Z-stack technique, and time lapse movies. The very high spatial resolution of RMI is able to resolve rock textures at sub-mm scales, which provides clues regarding the origin (igneous versus sedimentary) of rocks, and to reveal information about their diagenetic and weathering evolution. In addition to its scientific value over the range accessible by LIBS (1-7 m), we also show that RMI can also serve as a powerful long distance reconnaissance tool to characterize the landscape at distances up to several kilometers from the rover. JF - Icarus AU - Le Mouelic, S AU - Gasnault, O AU - Herkenhoff, K E AU - Bridges, Nathan T AU - Langevin, Y AU - Mangold, Nicolas AU - Maurice, Sylvestre AU - Wiens, Roger C AU - Pinet, Patrick AU - Newsom, Horton E AU - Deen, R G AU - Bell, J F, III AU - Johnson, J R AU - Rapin, W AU - Barraclough, B AU - Blaney, D L AU - DeFlores, L AU - Maki, J AU - Main, M C AU - Perez, R AU - Saccoccio, M Y1 - 2015/03/15/ PY - 2015 DA - 2015 Mar 15 SP - 93 EP - 107 PB - Elsevier, New York, NY VL - 249 SN - 0019-1035, 0019-1035 KW - soils KW - imagery KW - textures KW - data processing KW - Mars KW - Gale Crater KW - emission spectra KW - terrestrial planets KW - planets KW - Curiosity Rover KW - LIBS spectra KW - ChemCam KW - spectra KW - rocks KW - image analysis KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591360?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+ChemCam+remote+micro-imager+at+Gale+Crater%3B+review+of+the+first+year+of+operations+on+Mars&rft.au=Le+Mouelic%2C+S%3BGasnault%2C+O%3BHerkenhoff%2C+K+E%3BBridges%2C+Nathan+T%3BLangevin%2C+Y%3BMangold%2C+Nicolas%3BMaurice%2C+Sylvestre%3BWiens%2C+Roger+C%3BPinet%2C+Patrick%3BNewsom%2C+Horton+E%3BDeen%2C+R+G%3BBell%2C+J+F%2C+III%3BJohnson%2C+J+R%3BRapin%2C+W%3BBarraclough%2C+B%3BBlaney%2C+D+L%3BDeFlores%2C+L%3BMaki%2C+J%3BMain%2C+M+C%3BPerez%2C+R%3BSaccoccio%2C+M&rft.aulast=Le+Mouelic&rft.aufirst=S&rft.date=2015-03-15&rft.volume=249&rft.issue=&rft.spage=93&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.05.030 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 32 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-08-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - ChemCam; Curiosity Rover; data processing; emission spectra; Gale Crater; image analysis; imagery; LIBS spectra; Mars; planets; rocks; soils; spectra; terrestrial planets; textures DO - http://dx.doi.org/10.1016/j.icarus.2014.05.030 ER - TY - JOUR T1 - ChemCam passive reflections spectroscopy of surface materials at the Curiosity landing site, Mars AN - 1689591137; 2015-057187 AB - The spectrometers on the Mars Science Laboratory (MSL) ChemCam instrument were used in passive mode to record visible/near-infrared (400-840 nm) radiance from the martian surface. Using the onboard ChemCam calibration targets' housing as a reflectance standard, we developed methods to collect, calibrate, and reduce radiance observations to relative reflectance. Such measurements accurately reproduce the known reflectance spectra of other calibration targets on the rover, and represent the highest spatial resolution (0.65 mrad) and spectral sampling (<1 nm) visible/near-infrared reflectance spectra from a landed platform on Mars. Relative reflectance spectra of surface rocks and soils match those from orbital observations and multispectral data from the MSL Mastcam camera. Preliminary analyses of the band depths, spectral slopes, and reflectance ratios of the more than 2000 spectra taken during the first year of MSL operations demonstrate at least six spectral classes of materials distinguished by variations in ferrous and ferric components. Initial comparisons of ChemCam spectra to laboratory spectra of minerals and Mars analog materials demonstrate similarities with palagonitic soils and indications of orthopyroxene in some dark rocks. Magnesium-rich "raised ridges" tend to exhibit distinct near-infrared slopes. The ferric absorption downturn typically found for martian materials at <600 nm is greatly subdued in brushed rocks and drill tailings, consistent with their more ferrous nature. Calcium-sulfate veins exhibit the highest relative reflectances observed, but are still relatively red owing to the effects of residual dust. Such dust is overall less prominent on rocks sampled within the "blast zone" immediately surrounding the landing site. These samples were likely affected by the landing thrusters, which partially removed the ubiquitous dust coatings. Increased dust coatings on the calibration targets during the first year of the mission were documented by the ChemCam passive measurements as well. Ongoing efforts to model and correct for this dust component should improve calibration of the relative reflectance spectra. This will be useful as additional measurements are acquired during the rover's future examinations of hematite-, sulfate-, and phyllosilicate-bearing materials near the base of Mt. Sharp that are spectrally active in the 400-840 nm region. JF - Icarus AU - Johnson, Jeffrey R AU - Bell, J F, III AU - Bender, S AU - Blaney, D AU - Cloutis, E AU - DeFlores, L AU - Ehlmann, B AU - Gasnault, O AU - Gondet, B AU - Kinch, K AU - Lemmon, Mark T AU - Le Mouelic, S AU - Maurice, Sylvestre AU - Rice, M AU - Wiens, Roger C Y1 - 2015/03/15/ PY - 2015 DA - 2015 Mar 15 SP - 74 EP - 92 PB - Elsevier, New York, NY VL - 249 SN - 0019-1035, 0019-1035 KW - silicates KW - calcium sulfate KW - near-infrared spectra KW - volcanic rocks KW - iron oxides KW - glasses KW - igneous rocks KW - optical spectra KW - Mars KW - calibration KW - landing sites KW - palagonite KW - terrestrial planets KW - planets KW - pyroxene group KW - Curiosity Rover KW - Mars Science Laboratory KW - oxides KW - ChemCam KW - spectra KW - orbital observations KW - reflectance KW - chain silicates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591137?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=ChemCam+passive+reflections+spectroscopy+of+surface+materials+at+the+Curiosity+landing+site%2C+Mars&rft.au=Johnson%2C+Jeffrey+R%3BBell%2C+J+F%2C+III%3BBender%2C+S%3BBlaney%2C+D%3BCloutis%2C+E%3BDeFlores%2C+L%3BEhlmann%2C+B%3BGasnault%2C+O%3BGondet%2C+B%3BKinch%2C+K%3BLemmon%2C+Mark+T%3BLe+Mouelic%2C+S%3BMaurice%2C+Sylvestre%3BRice%2C+M%3BWiens%2C+Roger+C&rft.aulast=Johnson&rft.aufirst=Jeffrey&rft.date=2015-03-15&rft.volume=249&rft.issue=&rft.spage=74&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.02.028 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 71 N1 - PubXState - NY N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2015-06-18 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - calcium sulfate; calibration; chain silicates; ChemCam; Curiosity Rover; glasses; igneous rocks; iron oxides; landing sites; Mars; Mars Science Laboratory; near-infrared spectra; optical spectra; orbital observations; oxides; palagonite; planets; pyroxene group; reflectance; silicates; spectra; terrestrial planets; volcanic rocks DO - http://dx.doi.org/10.1016/j.icarus.2014.02.028 ER - TY - JOUR T1 - Hydrogen detection with ChemCam at Gale Crater AN - 1689590996; 2015-057185 AB - One of the main advantages of ChemCam's LIBS (Laser-Induced Breakdown Spectroscopy) instrument onboard the Curiosity rover is its potential to detect light elements such as hydrogen at fine scales, which has never been achieved on Mars. Hydrogen lines are detected in most of the data obtained within the first 320 sols of the mission at Gale crater, Mars. This work is a description of the hydrogen signal and its variability in the ChemCam LIBS spectra; it discusses the challenges of qualitative and quantitative analysis. Data acquisition and processing steps are investigated and optimized for the detection of hydrogen on Mars. Subtraction of an appropriate dark spectrum and the deconvolution of the superimposed emission of carbon from the low-pressure CO (sub 2) -dominated atmosphere are particularly important. Because the intensities of hydrogen are also affected by matrix effects, the hydrogen signal was investigated within groups of targets sharing common chemical features and similar matrices. The different groups cover a variety of rock and soil compositions encountered along the traverse (calcium sulfate veins, mafic soils, felsic, Mg-rich and Fe-rich rocks) including data from both drill holes and their tailings. Almost all these targets were found to be hydrated to variable extents. Soils have systematically higher hydrogen signals than rocks and pebbles, probably as a result of their alteration. The results from rocks suggest that various alteration processes leading to their hydration have taken place, which is consistent with the fluvial lacustrine context, the diagenetic features, and the mineralogy observed by Curiosity in Yellowknife Bay. JF - Icarus AU - Schroeder, S AU - Meslin, Pierre-Yves AU - Gasnault, O AU - Maurice, Sylvestre AU - Cousin, A AU - Wiens, Roger C AU - Rapin, W AU - Dyar, M D AU - Mangold, Nicolas AU - Forni, O AU - Nachon, Marion AU - Clegg, S AU - Johnson, J R AU - Lasue, J AU - Le Mouelic, S AU - Ollila, Ann M AU - Pinet, Patrick AU - Sautter, V AU - Vaniman, D Y1 - 2015/03/15/ PY - 2015 DA - 2015 Mar 15 SP - 43 EP - 61 PB - Elsevier, New York, NY VL - 249 SN - 0019-1035, 0019-1035 KW - silicates KW - calcium sulfate KW - alteration KW - data acquisition KW - data processing KW - Mars KW - Gale Crater KW - emission spectra KW - cluster analysis KW - mineral composition KW - multivariate analysis KW - Curiosity Rover KW - LIBS spectra KW - ChemCam KW - spectra KW - soils KW - secondary minerals KW - principal components analysis KW - Yellowknife Bay Formation KW - statistical analysis KW - smectite KW - clay minerals KW - terrestrial planets KW - planets KW - hydration KW - detection KW - hydrogen KW - sheet silicates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689590996?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=Hydrogen+detection+with+ChemCam+at+Gale+Crater&rft.au=Schroeder%2C+S%3BMeslin%2C+Pierre-Yves%3BGasnault%2C+O%3BMaurice%2C+Sylvestre%3BCousin%2C+A%3BWiens%2C+Roger+C%3BRapin%2C+W%3BDyar%2C+M+D%3BMangold%2C+Nicolas%3BForni%2C+O%3BNachon%2C+Marion%3BClegg%2C+S%3BJohnson%2C+J+R%3BLasue%2C+J%3BLe+Mouelic%2C+S%3BOllila%2C+Ann+M%3BPinet%2C+Patrick%3BSautter%2C+V%3BVaniman%2C+D&rft.aulast=Schroeder&rft.aufirst=S&rft.date=2015-03-15&rft.volume=249&rft.issue=&rft.spage=43&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.08.029 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 82 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-06-18 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - alteration; calcium sulfate; ChemCam; clay minerals; cluster analysis; Curiosity Rover; data acquisition; data processing; detection; emission spectra; Gale Crater; hydration; hydrogen; LIBS spectra; Mars; mineral composition; multivariate analysis; planets; principal components analysis; secondary minerals; sheet silicates; silicates; smectite; soils; spectra; statistical analysis; terrestrial planets; Yellowknife Bay Formation DO - http://dx.doi.org/10.1016/j.icarus.2014.08.029 ER - TY - JOUR T1 - ChemCam results from the Shaler outcrop in Gale Crater, Mars AN - 1689589778; 2015-057183 AB - The ChemCam campaign at the fluvial sedimentary outcrop 'Shaler' resulted in observations of 28 non-soil targets, 26 of which included active laser induced breakdown spectroscopy (LIBS), and all of which included Remote Micro-Imager (RMI) images. The Shaler outcrop can be divided into seven facies based on grain size, texture, color, resistance to erosion, and sedimentary structures. The ChemCam observations cover Facies 3 through 7. For all targets, the majority of the grains were below the limit of the RMI resolution, but many targets had a portion of resolvable grains coarser than approximately 0.5 mm. The Shaler facies show significant scatter in LIBS spectra and compositions from point to point, but several key compositional trends are apparent, most notably in the average K (sub 2) O content of the observed facies. Facies 3 is lower in K (sub 2) O than the other facies and is similar in composition to the "snake," a clastic dike that occurs lower in the Yellowknife Bay stratigraphic section. Facies 7 is enriched in K (sub 2) O relative to the other facies and shows some compositional and textural similarities to float rocks near Yellowknife Bay. The remaining facies (4, 5, and 6) are similar in composition to the Sheepbed and Gillespie Lake members, although the Shaler facies have slightly elevated K (sub 2) O and FeOT. Several analysis points within Shaler suggest the presence of feldspars, though these points have excess FeOT which suggests the presence of Fe oxide cement or inclusions. The majority of LIBS analyses have compositions which indicate that they are mixtures of pyroxene and feldspar. The Shaler feldspathic compositions are more alkaline than typical feldspars from shergottites, suggesting an alkaline basaltic source region, particularly for the K (sub 2) O-enriched Facies 7. Apart from possible iron-oxide cement, there is little evidence for chemical alteration at Shaler, although calcium-sulfate veins comparable to those observed lower in the stratigraphic section are present. The differing compositions, and inferred provenances at Shaler, suggest compositionally heterogeneous terrain in the Gale crater rim and surroundings, and intermittent periods of deposition. JF - Icarus AU - Anderson, Ryan AU - Bridges, J C AU - Williams, A AU - Edgar, L AU - Ollila, Ann M AU - Williams, J AU - Nachon, Marion AU - Mangold, Nicolas AU - Fisk, M AU - Schieber, J AU - Gupta, S AU - Dromart, G AU - Wiens, Roger C AU - Le Mouelic, S AU - Forni, O AU - Lanza, Nina L AU - Mezzacappa, Alissa AU - Sautter, V AU - Blaney, D AU - Clark, B AU - Clegg, S AU - Gasnault, O AU - Lasue, J AU - Leveille, Richard AU - Lewin, E AU - Lewis, K W AU - Maurice, Sylvestre AU - Newsom, Horton E AU - Schwenzer, Susanne P AU - Vaniman, D Y1 - 2015/03/15/ PY - 2015 DA - 2015 Mar 15 SP - 2 EP - 21 PB - Elsevier, New York, NY VL - 249 SN - 0019-1035, 0019-1035 KW - silicates KW - alteration KW - imagery KW - iron oxides KW - erosion KW - Mars KW - iron KW - Gale Crater KW - emission spectra KW - pyroxene group KW - Shaler outcrop KW - stratigraphic units KW - oxides KW - LIBS spectra KW - ChemCam KW - framework silicates KW - spectra KW - cement KW - chemical composition KW - sedimentary structures KW - cross-bedding KW - chain silicates KW - Yellowknife Bay KW - chemical weathering KW - textures KW - grain size KW - alkali metals KW - weathering KW - Sheepbed Member Formation KW - terrestrial planets KW - planets KW - planar bedding structures KW - metals KW - potassium KW - fluvial environment KW - feldspar group KW - facies KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689589778?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=ChemCam+results+from+the+Shaler+outcrop+in+Gale+Crater%2C+Mars&rft.au=Anderson%2C+Ryan%3BBridges%2C+J+C%3BWilliams%2C+A%3BEdgar%2C+L%3BOllila%2C+Ann+M%3BWilliams%2C+J%3BNachon%2C+Marion%3BMangold%2C+Nicolas%3BFisk%2C+M%3BSchieber%2C+J%3BGupta%2C+S%3BDromart%2C+G%3BWiens%2C+Roger+C%3BLe+Mouelic%2C+S%3BForni%2C+O%3BLanza%2C+Nina+L%3BMezzacappa%2C+Alissa%3BSautter%2C+V%3BBlaney%2C+D%3BClark%2C+B%3BClegg%2C+S%3BGasnault%2C+O%3BLasue%2C+J%3BLeveille%2C+Richard%3BLewin%2C+E%3BLewis%2C+K+W%3BMaurice%2C+Sylvestre%3BNewsom%2C+Horton+E%3BSchwenzer%2C+Susanne+P%3BVaniman%2C+D&rft.aulast=Anderson&rft.aufirst=Ryan&rft.date=2015-03-15&rft.volume=249&rft.issue=&rft.spage=2&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.07.025 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 49 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-06-18 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - alkali metals; alteration; cement; chain silicates; ChemCam; chemical composition; chemical weathering; cross-bedding; emission spectra; erosion; facies; feldspar group; fluvial environment; framework silicates; Gale Crater; grain size; imagery; iron; iron oxides; LIBS spectra; Mars; metals; oxides; planar bedding structures; planets; potassium; pyroxene group; sedimentary structures; Shaler outcrop; Sheepbed Member Formation; silicates; spectra; stratigraphic units; terrestrial planets; textures; weathering; Yellowknife Bay DO - http://dx.doi.org/10.1016/j.icarus.2014.07.025 ER - TY - JOUR T1 - Compositions of coarse and fine particles in Martian soils at Gale; a window into the production of soils AN - 1689589729; 2015-057184 AB - The ChemCam instrument onboard the Curiosity rover provides for the first time an opportunity to study martian soils at a sub-millimeter resolution. In this work, we analyzed 24 soil targets probed by ChemCam during the first 250 sols on Mars. Using the depth profile capability of the ChemCam LIBS (Laser-Induced Breakdown Spectroscopy) technique, we found that 45% of the soils contained coarse grains (>500 mu m). Three distinct clusters have been detected: Cluster 1 shows a low SiO (sub 2) content; Cluster 2 corresponds to coarse grains with a felsic composition, whereas Cluster 3 presents a typical basaltic composition. Coarse grains from Cluster 2 have been mostly observed exposed in the vicinity of the landing site, whereas coarse grains from Clusters 1 and 3 have been detected mostly buried, and were found all along the rover traverse. The possible origin of these coarse grains was investigated. Felsic (Cluster 2) coarse grains have the same origin as the felsic rocks encountered near the landing site, whereas the origin of the coarse grains from Clusters 1 and 3 seems to be more global. Fine-grained soils (particle size < laser beam diameter which is between 300 and 500 mu m) show a homogeneous composition all along the traverse, different from the composition of the rocks encountered at Gale. Although they contain a certain amount of hydrated amorphous component depleted in SiO (sub 2) , possibly present as a surface coating, their overall chemical homogeneity and their close-to-basaltic composition suggest limited, or isochemical alteration, and a limited interaction with liquid water. Fine particles and coarse grains from Cluster 1 have a similar composition, and the former could derive from weathering of the latter. Overall martian soils have a bulk composition between that of fine particles and coarse grains. This work shows that the ChemCam instrument provides a means to study the variability of soil composition at a scale not achievable by bulk chemical analyses. JF - Icarus AU - Cousin, A AU - Meslin, Pierre-Yves AU - Wiens, Roger C AU - Rapin, W AU - Mangold, Nicolas AU - Fabre, C AU - Gasnault, O AU - Forni, O AU - Tokar, Robert AU - Ollila, Ann M AU - Schroeder, S AU - Lasue, J AU - Maurice, Sylvestre AU - Sautter, V AU - Newsom, Horton E AU - Vaniman, D AU - Le Mouelic, S AU - Dyar, D AU - Berger, G AU - Blaney, D AU - Nachon, Marion AU - Dromart, G AU - Lanza, Nina L AU - Clark, B AU - Clegg, S AU - Goetz, W AU - Berger, Jeffrey A AU - Barraclough, B AU - Delapp, D Y1 - 2015/03/15/ PY - 2015 DA - 2015 Mar 15 SP - 22 EP - 42 PB - Elsevier, New York, NY VL - 249 SN - 0019-1035, 0019-1035 KW - Mars KW - landing sites KW - Gale Crater KW - emission spectra KW - cluster analysis KW - multivariate analysis KW - coarse-grained materials KW - silica KW - mixing KW - Curiosity Rover KW - LIBS spectra KW - ChemCam KW - spectra KW - heterogeneity KW - chemical composition KW - basaltic composition KW - soils KW - grain size KW - statistical analysis KW - felsic composition KW - terrestrial planets KW - planets KW - fine-grained materials KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689589729?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=Compositions+of+coarse+and+fine+particles+in+Martian+soils+at+Gale%3B+a+window+into+the+production+of+soils&rft.au=Cousin%2C+A%3BMeslin%2C+Pierre-Yves%3BWiens%2C+Roger+C%3BRapin%2C+W%3BMangold%2C+Nicolas%3BFabre%2C+C%3BGasnault%2C+O%3BForni%2C+O%3BTokar%2C+Robert%3BOllila%2C+Ann+M%3BSchroeder%2C+S%3BLasue%2C+J%3BMaurice%2C+Sylvestre%3BSautter%2C+V%3BNewsom%2C+Horton+E%3BVaniman%2C+D%3BLe+Mouelic%2C+S%3BDyar%2C+D%3BBerger%2C+G%3BBlaney%2C+D%3BNachon%2C+Marion%3BDromart%2C+G%3BLanza%2C+Nina+L%3BClark%2C+B%3BClegg%2C+S%3BGoetz%2C+W%3BBerger%2C+Jeffrey+A%3BBarraclough%2C+B%3BDelapp%2C+D&rft.aulast=Cousin&rft.aufirst=A&rft.date=2015-03-15&rft.volume=249&rft.issue=&rft.spage=22&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.04.052 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 74 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-06-18 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - basaltic composition; ChemCam; chemical composition; cluster analysis; coarse-grained materials; Curiosity Rover; emission spectra; felsic composition; fine-grained materials; Gale Crater; grain size; heterogeneity; landing sites; LIBS spectra; Mars; mixing; multivariate analysis; planets; regolith; silica; soils; spectra; statistical analysis; terrestrial planets DO - http://dx.doi.org/10.1016/j.icarus.2014.04.052 ER - TY - CPAPER T1 - The Aqueous Corrosion Behavior of Technetium Alloy Materials T2 - 2015 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2015) AN - 1684407036; 6349557 JF - 2015 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2015) AU - Kolman, David AU - Cisneros, Mike AU - Goff, George AU - Taylor, Christopher AU - Jarvinen, Gordon AU - Poineau, Frederic Y1 - 2015/03/15/ PY - 2015 DA - 2015 Mar 15 KW - Technetium KW - Corrosion KW - Alloys KW - alloys UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1684407036?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2015+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2015%29&rft.atitle=The+Aqueous+Corrosion+Behavior+of+Technetium+Alloy+Materials&rft.au=Kolman%2C+David%3BCisneros%2C+Mike%3BGoff%2C+George%3BTaylor%2C+Christopher%3BJarvinen%2C+Gordon%3BPoineau%2C+Frederic&rft.aulast=Kolman&rft.aufirst=David&rft.date=2015-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2015+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2015%29&rft.issn=&rft_id=info:doi/ L2 - http://corrosionfp.epubxp.com/t/165607-corrosion-2015-final-program LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-05-29 N1 - Last updated - 2015-06-01 ER - TY - JOUR T1 - Relating reactive solute transport to hierarchical and multiscale sedimentary architecture in a Lagrangian-based transport model; 2, Particle displacement variance AN - 1729843323; 2015-101515 AB - This series of papers addresses the transport of sorbing solutes in groundwater. In part 2, plume dispersion, as quantified by the particle displacement variance, X (super R) (sub 11) (t), is linked to hierarchical sedimentary architecture using a Lagrangian-based transport model. This allows for a fundamental understanding of how dispersion arises from the hierarchical architecture of sedimentary facies, and allows for a quantitative decomposition of dispersion into facies-related contributions at different scales within the hierarchy. As in part 1, the plume behavior is assumed to be controlled by linear-equilibrium sorption and the heterogeneity in both the log permeability, Y=ln(k), and the log distribution coefficient, Xi =ln(k (sub d) ) Heterogeneity in Y and Xi arises from sedimentary processes and is structured by the consequent sedimentary architecture. Our goal is to understand the basic science of the dispersion process at this very fundamental level. The spatial auto and cross covariances for the relevant attributes are linear sums of terms corresponding to the probability of transitioning across stratal facies types defined at different scales. Unlike previous studies that used empirical relationships for the spatial covariances, here the model parameters are developed from independent measurements of physically quantifiable attributes of the stratal architecture (i.e., proportions and lengths of facies types, and univariate statistics for Y and Xi ). Nothing is assumed about Y-Xi point correlation; it is allowed to differ by facies type. However, it is assumed that Y and Xi variance is small but meaningful, and that pore-scale dispersion is negligible. The time-dependent spreading rate is a function of the effective ranges of the cross-transition probability structures (i.e., the ranges of indicator correlation structures) for each relevant scale of stratal hierarchy. As in part 1, the well-documented perchloroethene (PCE) tracer test at the Borden research site is used to illustrate the model. The model was parameterized with univariate statistics for y, Xi of (PCE), and proportions and lengths of lithologic facies types defined at two scales within a two-level hierarchical classification, as given by Ritzi et al. ([Ritzi, R. W., Jr, 2013]). The model gives a viable explanation for the observed PCE plume dispersion, and thus x (super R) (sub 11) (t) can be explained by the process of linear equilibrium sorption and the heterogeneity in k and k (sub d) . The results quantitatively show that the k-k (sub d) cross correlation, though small, and varied by facies type, can significantly impact the particle displacement variance. Furthermore, by quantitatively decomposing the dispersion into facies-related contributions, we gain the fundamental insight that that the time-dependent rate of spreading is mostly defined by the cross-transition probability correlation structure imparted by the proportions and sizes of the larger-scale facies types. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Soltanian, Mohamad Reza AU - Ritzi, Robert W AU - Huang, Chao Cheng AU - Dai, Zhenxue Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 1601 EP - 1618 PB - American Geophysical Union, Washington, DC VL - 51 IS - 3 SN - 0043-1397, 0043-1397 KW - solute transport KW - sorption KW - Simcoe County Ontario KW - contaminant plumes KW - ground water KW - transport KW - reactive transport KW - probability KW - Borden Aquifer KW - North America KW - numerical models KW - sediment transport KW - statistical analysis KW - solutes KW - pollution KW - mathematical models KW - equations KW - Ontario KW - aquifers KW - Canada KW - mathematical methods KW - Borden Ontario KW - Eastern Canada KW - permeability KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729843323?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Relating+reactive+solute+transport+to+hierarchical+and+multiscale+sedimentary+architecture+in+a+Lagrangian-based+transport+model%3B+2%2C+Particle+displacement+variance&rft.au=Soltanian%2C+Mohamad+Reza%3BRitzi%2C+Robert+W%3BHuang%2C+Chao+Cheng%3BDai%2C+Zhenxue&rft.aulast=Soltanian&rft.aufirst=Mohamad&rft.date=2015-03-01&rft.volume=51&rft.issue=3&rft.spage=1601&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2014WR016354 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 53 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-11-05 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - aquifers; Borden Aquifer; Borden Ontario; Canada; contaminant plumes; Eastern Canada; equations; ground water; mathematical methods; mathematical models; North America; numerical models; Ontario; permeability; pollution; probability; reactive transport; sediment transport; Simcoe County Ontario; solute transport; solutes; sorption; statistical analysis; transport DO - http://dx.doi.org/10.1002/2014WR016354 ER - TY - JOUR T1 - Relating reactive solute transport to hierarchical and multiscale sedimentary architecture in a Lagrangian-based transport model; 1, Time-dependent effective retardation factor AN - 1729843255; 2015-101514 AB - This series of papers addresses the transport of reactive solutes in groundwater. In part 1, the time-dependent effective retardation factor, R (sub eff) (t), of reactive solutes undergoing equilibrium sorption is linked to hierarchical stratal architecture using a Lagrangian-based transport model. The model is based on hierarchical expressions of the spatial covariance of the log distribution coefficient, Xi and the spatial cross covariance between Y=ln(k) The spatial correlation structure in these covariance expressions is the probability of transitioning across strata types of different scales, and they are parameterized by independent and quantifiable physical attributes of sedimentary architecture including univariate statistics for Y, Xi and the proportions and lengths of facies. Nothing is assumed about Y-Xi point correlation; it is allowed to differ by facies type. The duration of the time-dependent change in R (sub eff) (t) is a function of the effective ranges of the cross-transition probability structures (i.e., the ranges of indicator correlation structures) for each scale of stratal architecture. The plume velocity and the effective retardation stabilize at a large-time limit after the plume centroid has traveled a distance that encompasses the effective ranges of these cross-transition probability structures. The well-documented perchloroethene (PCE) tracer test at the Borden research site is used to illustrate the model. The model gives a viable explanation for the observed PCE plume deceleration, and thus the observed R (sub eff) (t) cam be explained by the process of linear equilibrium sorption and the heterogeneity in k and K (sub d) . In part 2 [Soltanian et al., [Soltanian, M. R., 2015a]], reactive plume dispersion, as quantified by the particle displacement variance is linked to stratal architecture using a Lagrangian-based transport model. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Soltanian, Mohamad Reza AU - Ritzi, Robert W AU - Huang, Chao Cheng AU - Dai, Zhenxue Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 1586 EP - 1600 PB - American Geophysical Union, Washington, DC VL - 51 IS - 3 SN - 0043-1397, 0043-1397 KW - solute transport KW - North America KW - sorption KW - Simcoe County Ontario KW - numerical models KW - contaminant plumes KW - statistical analysis KW - solutes KW - pollution KW - mathematical models KW - Ontario KW - ground water KW - aquifers KW - Canada KW - transport KW - reactive transport KW - probability KW - Borden Ontario KW - Eastern Canada KW - Borden Aquifer KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729843255?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Relating+reactive+solute+transport+to+hierarchical+and+multiscale+sedimentary+architecture+in+a+Lagrangian-based+transport+model%3B+1%2C+Time-dependent+effective+retardation+factor&rft.au=Soltanian%2C+Mohamad+Reza%3BRitzi%2C+Robert+W%3BHuang%2C+Chao+Cheng%3BDai%2C+Zhenxue&rft.aulast=Soltanian&rft.aufirst=Mohamad&rft.date=2015-03-01&rft.volume=51&rft.issue=3&rft.spage=1586&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2014WR016353 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 53 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-11-05 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - aquifers; Borden Aquifer; Borden Ontario; Canada; contaminant plumes; Eastern Canada; ground water; mathematical models; North America; numerical models; Ontario; pollution; probability; reactive transport; Simcoe County Ontario; solute transport; solutes; sorption; statistical analysis; transport DO - http://dx.doi.org/10.1002/2014WR016353 ER - TY - JOUR T1 - Reconstruction of the diets and habitats of late Miocene herbivores from the Dove Spring Formation, Mojave Desert, Southern California AN - 1718050019; 2015-096475 AB - In the late Miocene, there was a worldwide, rapid increase in C4 ecosystems (RICE). Recent studies from the Great Plains and the Barstow Formation suggest that there may have been a significant amount of C4 grasslands prior to the RICE event. This study examines stable carbon isotopic ratios of herbivore tooth enamel from the Dove Spring Formation (DSF) of southern California, which is geologically younger than the Barstow Formation. Taxa sampled in this study include the Camelidae, Antilocapridae, Gomphotheriidae, Equidae, Merycoidodontidae, Castoridae, and Rhinocerotidae families. The enamel delta 13C values of all taxa sampled are -10.1+ or -1.1 ppm (n=89), ranging from -13.3 to -6.7 ppm. Past studies have used -8 ppm as the cutoff for a pure C3 diet, which would be indicative of a percentage of C4 grasses in diets of some of the DSF herbivores and support the idea of an early regional spread of C4 grasslands. All specimens whose carbon isotopic signature was higher than -8 ppm were from the Equidae and Antilocapridae families, similar to the results of the study of the Barstow Formation ungulates. However, a cutoff value of -8 ppm for a pure C3 diet is reliant on the modern atmospheric delta 13C value. Proxy data indicate that the delta 13C value of atmospheric CO2 has varied significantly in the geologic past. The estimated Miocene delta 13C value of atmospheric CO2 was approximately 2-3 ppm higher than the modern value, making the pure C3 diet cutoff value higher. With a higher end member delta 13C value for a pure C3 diet, much of the reported evidence of an early spread of C4 grasses in areas such as the Great Plains and the Barstow Formation may be a false signal from water-stressed C3 plants and the amount of C4 biomass in the geologic past may have been greatly over-estimated. After accounting for the changes in the delta 13C of atmospheric CO2, tooth enamel delta 13C values from the DSF indicate that late Miocene herbivores in the area had primarily C3 diets and lived in an environment dominated by C3 plants. JF - Abstracts with Programs - Geological Society of America AU - Bowman, Chelsie N AU - Wang, Yang AU - Wang, Xiaoming AU - Takeuchi, Gary T AU - Faull, Mark AU - Anonymous Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 26 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 2 SN - 0016-7592, 0016-7592 KW - 11:Vertebrate paleontology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718050019?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Reconstruction+of+the+diets+and+habitats+of+late+Miocene+herbivores+from+the+Dove+Spring+Formation%2C+Mojave+Desert%2C+Southern+California&rft.au=Bowman%2C+Chelsie+N%3BWang%2C+Yang%3BWang%2C+Xiaoming%3BTakeuchi%2C+Gary+T%3BFaull%2C+Mark%3BAnonymous&rft.aulast=Bowman&rft.aufirst=Chelsie&rft.date=2015-03-01&rft.volume=47&rft.issue=2&rft.spage=26&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Southeastern Section, 64th annual meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-10-01 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Chemical variations in Yellowknife Bay Formation sedimentary rocks analyzed by ChemCam on board the Curiosity Rover on Mars AN - 1700098189; 2015-073235 AB - The Yellowknife Bay formation represents a approximately 5 m thick stratigraphic section of lithified fluvial and lacustrine sediments analyzed by the Curiosity rover in Gale crater, Mars. Previous works have mainly focused on the mudstones that were drilled by the rover at two locations. The present study focuses on the sedimentary rocks stratigraphically above the mudstones by studying their chemical variations in parallel with rock textures. Results show that differences in composition correlate with textures and both manifest subtle but significant variations through the stratigraphic column. Though the chemistry of the sediments does not vary much in the lower part of the stratigraphy, the variations in alkali elements indicate variations in the source material and/or physical sorting, as shown by the identification of alkali feldspars. The sandstones contain similar relative proportions of hydrogen to the mudstones below, suggesting the presence of hydrous minerals that may have contributed to their cementation. Slight variations in magnesium correlate with changes in textures suggesting that diagenesis through cementation and dissolution modified the initial rock composition and texture simultaneously. The upper part of the stratigraphy ( approximately 1 m thick) displays rocks with different compositions suggesting a strong change in the depositional system. The presence of float rocks with similar compositions found along the rover traverse suggests that some of these outcrops extend further away in the nearby hummocky plains. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Mangold, Nicolas AU - Forni, O AU - Dromart, G AU - Stack, K AU - Wiens, R C AU - Gasnault, O AU - Sumner, D Y AU - Nachon, M AU - Meslin, P Y AU - Anderson, R B AU - Barraclough, B AU - Bell, J F, III AU - Berger, G AU - Blaney, D L AU - Bridges, J C AU - Calef, F AU - Clark, B AU - Clegg, S M AU - Cousin, A AU - Edgar, L AU - Edgett, K AU - Ehlmann, B AU - Fabre, C AU - Fisk, M AU - Grotzinger, J AU - Gupta, S AU - Herkenhoff, K E AU - Hurowitz, J AU - Johnson, J R AU - Kah, L C AU - Lanza, Nina L AU - Lasue, Jeremie AU - Le Mouelic, Stephane AU - Leveille, R AU - Lewin, E AU - Malin, M AU - McLennan, S M AU - Maurice, S AU - Melikechi, N AU - Mezzacappa, A AU - Milliken, Ralph AU - Newsom, H E AU - Ollila, A AU - Rowland, Scott K AU - Sautter, V AU - Schmidt, M AU - Schroeder, S AU - d'Uston, C AU - Vaniman, D AU - Williams, R M Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 452 EP - 482 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 3 SN - 2169-9097, 2169-9097 KW - silicates KW - alkaline earth metals KW - magnesium KW - mudstone KW - Yellowknife Bay Formation KW - sedimentation KW - Mars KW - fluvial sedimentation KW - Gale Crater KW - terrestrial planets KW - planets KW - sedimentary rocks KW - alkali feldspar KW - metals KW - diagenesis KW - Curiosity Rover KW - sediments KW - ChemCam KW - framework silicates KW - chemical composition KW - feldspar group KW - clastic rocks KW - lacustrine sedimentation KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700098189?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Chemical+variations+in+Yellowknife+Bay+Formation+sedimentary+rocks+analyzed+by+ChemCam+on+board+the+Curiosity+Rover+on+Mars&rft.au=Mangold%2C+Nicolas%3BForni%2C+O%3BDromart%2C+G%3BStack%2C+K%3BWiens%2C+R+C%3BGasnault%2C+O%3BSumner%2C+D+Y%3BNachon%2C+M%3BMeslin%2C+P+Y%3BAnderson%2C+R+B%3BBarraclough%2C+B%3BBell%2C+J+F%2C+III%3BBerger%2C+G%3BBlaney%2C+D+L%3BBridges%2C+J+C%3BCalef%2C+F%3BClark%2C+B%3BClegg%2C+S+M%3BCousin%2C+A%3BEdgar%2C+L%3BEdgett%2C+K%3BEhlmann%2C+B%3BFabre%2C+C%3BFisk%2C+M%3BGrotzinger%2C+J%3BGupta%2C+S%3BHerkenhoff%2C+K+E%3BHurowitz%2C+J%3BJohnson%2C+J+R%3BKah%2C+L+C%3BLanza%2C+Nina+L%3BLasue%2C+Jeremie%3BLe+Mouelic%2C+Stephane%3BLeveille%2C+R%3BLewin%2C+E%3BMalin%2C+M%3BMcLennan%2C+S+M%3BMaurice%2C+S%3BMelikechi%2C+N%3BMezzacappa%2C+A%3BMilliken%2C+Ralph%3BNewsom%2C+H+E%3BOllila%2C+A%3BRowland%2C+Scott+K%3BSautter%2C+V%3BSchmidt%2C+M%3BSchroeder%2C+S%3Bd%27Uston%2C+C%3BVaniman%2C+D%3BWilliams%2C+R+M&rft.aulast=Mangold&rft.aufirst=Nicolas&rft.date=2015-03-01&rft.volume=120&rft.issue=3&rft.spage=452&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004681 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 61 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-07-30 N1 - SubjectsTermNotLitGenreText - alkali feldspar; alkaline earth metals; ChemCam; chemical composition; clastic rocks; Curiosity Rover; diagenesis; feldspar group; fluvial sedimentation; framework silicates; Gale Crater; lacustrine sedimentation; magnesium; Mars; metals; mudstone; planets; sedimentary rocks; sedimentation; sediments; silicates; terrestrial planets; Yellowknife Bay Formation DO - http://dx.doi.org/10.1002/2014JE004681 ER - TY - JOUR T1 - Lithospheric instability and the source of the Cameroon volcanic line; evidence from Rayleigh wave phase velocity tomography AN - 1692742693; 2015-060678 AB - The Cameroon Volcanic Line (CVL) is a 1800 km long volcanic chain, extending SW-NE from the Gulf of Guinea into Central Africa, that lacks the typical age progression exhibited by hot spot-related volcanic tracks. This study investigates the upper mantle seismic structure beneath the CVL and surrounding regions to constrain the origin of volcanic lines that are poorly described by the classic plume model. Rayleigh wave phase velocities are measured at periods from 20 to 182 s following the two-plane wave methodology, using data from the Cameroon Seismic Experiment, which consists of 32 broadband stations deployed between 2005 and 2007. These phase velocities are then inverted to build a model of shear wave velocity structure in the upper mantle beneath the CVL. Results show that phase velocities beneath the CVL are reduced at all periods, with average velocities beneath the CVL deviating more than -2% from the regional average and +4% beneath the Congo Craton. This distinction is observed for all periods but is less pronounced for the longest periods measured. Inversion for shear wave velocity structure indicates a tabular low velocity anomaly directly beneath the CVL at depths of 50 to at least 200 km and a sharp vertical boundary with faster velocities beneath the Congo Craton. These observations demonstrate widespread infiltration or erosion of the continental lithosphere beneath the CVL, most likely caused by mantle upwelling associated with edge-flow convection driven by the Congo Craton or by lithospheric instabilities that develop due to the nearby edge of the African continent. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Adams, Aubreya N AU - Wiens, Douglas A AU - Nyblade, Andrew A AU - Euler, Garrett G AU - Shore, Patrick J AU - Tibi, Rigobert Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 1708 EP - 1727 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 3 SN - 2169-9313, 2169-9313 KW - tomography KW - hot spots KW - guided waves KW - lithosphere KW - Gulf of Guinea KW - Cameroon Line KW - elastic waves KW - continental crust KW - Central Africa KW - Rayleigh waves KW - Congo Craton KW - continental lithosphere KW - surface waves KW - volcanism KW - volcanoes KW - velocity KW - Africa KW - seismic waves KW - North Atlantic KW - crust KW - Atlantic Ocean KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742693?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Lithospheric+instability+and+the+source+of+the+Cameroon+volcanic+line%3B+evidence+from+Rayleigh+wave+phase+velocity+tomography&rft.au=Adams%2C+Aubreya+N%3BWiens%2C+Douglas+A%3BNyblade%2C+Andrew+A%3BEuler%2C+Garrett+G%3BShore%2C+Patrick+J%3BTibi%2C+Rigobert&rft.aulast=Adams&rft.aufirst=Aubreya&rft.date=2015-03-01&rft.volume=120&rft.issue=3&rft.spage=1708&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2014JB011580 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 34 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2015-07-02 N1 - SubjectsTermNotLitGenreText - Africa; Atlantic Ocean; Cameroon Line; Central Africa; Congo Craton; continental crust; continental lithosphere; crust; elastic waves; guided waves; Gulf of Guinea; hot spots; lithosphere; North Atlantic; Rayleigh waves; seismic waves; surface waves; tomography; velocity; volcanism; volcanoes DO - http://dx.doi.org/10.1002/2014JB011580 ER - TY - JOUR T1 - Eddy-driven sediment transport in the Argentine Basin; is the height of the Zapiola Rise hydrodynamically controlled? AN - 1692742348; 2015-060641 AB - In this study, we address the question whether eddy-driven transports in the Argentine Basin can be held responsible for enhanced sediment accumulation over the Zapiola Rise, hence accounting for the existence and growth of this sediment drift. To address this question, we perform a 6 year simulation with a strongly eddying ocean model. We release two passive tracers, with settling velocities that are consistent with silt and clay size particles. Our experiments show contrasting behavior between the silt fraction and the lighter clay. Due to its larger settling velocity, the silt fraction reaches a quasisteady state within a few years, with abyssal sedimentation rates that match net input. In contrast, clay settles only slowly, and its distribution is heavily stratified, being transported mainly along isopycnals. Yet, both size classes display a significant and persistent concentration minimum over the Zapiola Rise. We show that the Zapiola Anticyclone, a strong eddy-driven vortex that circulates around the Zapiola Rise, is a barrier to sediment transport, and hence prevents significant accumulation of sediments on the Rise. We conclude that sediment transport by the turbulent circulation in the Argentine Basin alone cannot account for the preferred sediment accumulation over the Rise. We speculate that resuspension is a critical process in the formation and maintenance of the Zapiola Rise. Abstract Copyright (2015), . The Authors. JF - Journal of Geophysical Research: Oceans AU - Weijer, Wilbert AU - Maltrud, Mathew E AU - Homoky, William B AU - Polzin, Kurt L AU - Maas, Leo R M Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 2096 EP - 2111 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 3 SN - 2169-9275, 2169-9275 KW - currents KW - ocean circulation KW - sediment transport KW - Argentine Basin KW - marine transport KW - ocean currents KW - Zapiola Rise KW - marine sediments KW - transport KW - eddies KW - sediments KW - hydrodynamics KW - South Atlantic KW - Atlantic Ocean KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742348?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Eddy-driven+sediment+transport+in+the+Argentine+Basin%3B+is+the+height+of+the+Zapiola+Rise+hydrodynamically+controlled%3F&rft.au=Weijer%2C+Wilbert%3BMaltrud%2C+Mathew+E%3BHomoky%2C+William+B%3BPolzin%2C+Kurt+L%3BMaas%2C+Leo+R+M&rft.aulast=Weijer&rft.aufirst=Wilbert&rft.date=2015-03-01&rft.volume=120&rft.issue=3&rft.spage=2096&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2014JC010573 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 38 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2015-07-02 N1 - SubjectsTermNotLitGenreText - Argentine Basin; Atlantic Ocean; currents; eddies; hydrodynamics; marine sediments; marine transport; ocean circulation; ocean currents; sediment transport; sediments; South Atlantic; transport; Zapiola Rise DO - http://dx.doi.org/10.1002/2014JC010573 ER - TY - JOUR T1 - A set of measures for the systematic classification of the nonlinear elastic behavior of disparate rocks AN - 1692742308; 2015-060671 AB - Dynamic acoustoelastic testing is performed on a set of six rock samples (four sandstones, one soapstone, and one granite). From these studies at 20 strain levels 10 (super -7) <<10 (super -5) , four measures characterizing the nonlinear elastic response of each sample are found. Additionally, each sample is tested with nonlinear resonant ultrasonic spectroscopy and a fifth measure of nonlinear elastic response is found. These five measures of the nonlinear elastic response of the samples (approximately 3 X 6X20 X 5 numbers as each measurement is repeated 3 times) are subjected to careful analysis using model-independent statistical methods, principal component analysis, and fuzzy clustering. This analysis reveals differences among the samples and differences among the nonlinear measures. Four of the nonlinear measures are sensing much the same physical mechanism in the samples. The fifth is seeing something different. This is the case for all samples. Although the same physical mechanisms (two) are operating in all samples, there are distinctive features in the way the physical mechanisms present themselves from sample to sample. This suggests classification of the samples into two groups. The numbers in this study and the classification of the measures/samples constitute an empirical characterization of rock nonlinear elastic properties that can serve as a valuable testing ground for physically based theories that relate rock nonlinear elastic properties to microscopic elastic features. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Riviere, Jacques AU - Shokouhi, Parisa AU - Guyer, Robert A AU - Johnson, Paul A Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 1587 EP - 1604 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 3 SN - 2169-9313, 2169-9313 KW - elasticity KW - acoustical properties KW - igneous rocks KW - elastic properties KW - granites KW - statistical analysis KW - sandstone KW - mechanical properties KW - rock mechanics KW - sedimentary rocks KW - plutonic rocks KW - classification KW - soapstone KW - nonlinear processes KW - clastic rocks KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=A+set+of+measures+for+the+systematic+classification+of+the+nonlinear+elastic+behavior+of+disparate+rocks&rft.au=Riviere%2C+Jacques%3BShokouhi%2C+Parisa%3BGuyer%2C+Robert+A%3BJohnson%2C+Paul+A&rft.aulast=Riviere&rft.aufirst=Jacques&rft.date=2015-03-01&rft.volume=120&rft.issue=3&rft.spage=1587&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2014JB011718 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 41 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-07-02 N1 - SubjectsTermNotLitGenreText - acoustical properties; classification; clastic rocks; elastic properties; elasticity; granites; igneous rocks; mechanical properties; nonlinear processes; plutonic rocks; rock mechanics; sandstone; sedimentary rocks; soapstone; statistical analysis DO - http://dx.doi.org/10.1002/2014JB011718 ER - TY - JOUR T1 - First-principles insights into the nature of zirconium-iodine interactions and the initiation of iodine-induced stress-corrosion cracking AN - 1687665921; PQ0001574890 AB - We present research relating to iodine-induced stress corrosion cracking (ISCC) and draw insights relevant to the initiation process. The means by which this corrosion initiates is currently unknown. Our previous work has highlighted some of the chemical processes and properties that must be considered in ISCC, and enable us to make some possible connections in the overall corrosion mechanism. A series of calculations has been performed to better characterize the iodine interaction with zirconium, following a hybrid approach that integrates both molecular and solid-state calculations for incorporation into large scale simulations. JF - Journal of Nuclear Materials AU - Rossi, Matthew L AU - Taylor, Christopher D AD - Los Alamos National Laboratory, Los Alamos, NM 87545, Unites States; U.S. Nuclear Regulatory Commission, Rockville, MD 20852, Unites States, chemistry.mlr@gmail.com Y1 - 2015/03// PY - 2015 DA - Mar 2015 SP - 1 EP - 10 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 458 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Chemical process industry KW - Stress corrosion KW - Hybrids KW - Radioactive materials KW - Corrosion KW - Iodine KW - Simulation KW - Zirconium KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1687665921?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=First-principles+insights+into+the+nature+of+zirconium-iodine+interactions+and+the+initiation+of+iodine-induced+stress-corrosion+cracking&rft.au=Rossi%2C+Matthew+L%3BTaylor%2C+Christopher+D&rft.aulast=Rossi&rft.aufirst=Matthew&rft.date=2015-03-01&rft.volume=458&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.11.114 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-06-01 N1 - Number of references - 61 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Stress corrosion; Chemical process industry; Hybrids; Radioactive materials; Corrosion; Simulation; Iodine; Zirconium DO - http://dx.doi.org/10.1016/j.jnucmat.2014.11.114 ER - TY - JOUR T1 - Ordering of water in opals with different microstructures AN - 1686057545; 2015-052252 AB - Opal has long fascinated scientists. It is one of the few minerals with an amorphous structure, and yet, compared to silica glass, it is highly organized on the mesoscale. By means of inelastic neutron scattering (INS), we could document that in four samples of opal at low temperature an ice-like structure of water is present, with details depending on microstructural characteristics. While FTIR spectra for all samples are nearly identical and thus not very informative, INS shows clear differences, highlighting the significance of microstructures. Neutron diffraction at 100 K on one of the opal samples provides evidence for crystalline cubic ice. JF - European Journal of Mineralogy AU - Eckert, Jurgen AU - Gourdon, Olivier AU - Jacob, Dorrit E AU - Meral, Cagla AU - Monteiro, Paulo J M AU - Vogel, Sven C AU - Wirth, Richard AU - Wenk, Hans-Rudolf Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 203 EP - 213 PB - Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart VL - 27 IS - 2 SN - 0935-1221, 0935-1221 KW - water KW - silicates KW - silica minerals KW - amorphous materials KW - opal KW - microstructure KW - crystal structure KW - TEM data KW - temperature KW - infrared spectra KW - inelastic neutron scattering KW - FTIR spectra KW - neutron diffraction data KW - low temperature KW - water content KW - framework silicates KW - spectra KW - crystal chemistry KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686057545?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=European+Journal+of+Mineralogy&rft.atitle=Ordering+of+water+in+opals+with+different+microstructures&rft.au=Eckert%2C+Jurgen%3BGourdon%2C+Olivier%3BJacob%2C+Dorrit+E%3BMeral%2C+Cagla%3BMonteiro%2C+Paulo+J+M%3BVogel%2C+Sven+C%3BWirth%2C+Richard%3BWenk%2C+Hans-Rudolf&rft.aulast=Eckert&rft.aufirst=Jurgen&rft.date=2015-03-01&rft.volume=27&rft.issue=2&rft.spage=203&rft.isbn=&rft.btitle=&rft.title=European+Journal+of+Mineralogy&rft.issn=09351221&rft_id=info:doi/10.1127%2Fejm%2F2015%2F0027-2428 L2 - http://www.schweizerbart.de/j/ejm/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 57 N1 - Document feature - illus. N1 - Last updated - 2015-06-05 N1 - SubjectsTermNotLitGenreText - amorphous materials; crystal chemistry; crystal structure; framework silicates; FTIR spectra; inelastic neutron scattering; infrared spectra; low temperature; microstructure; neutron diffraction data; opal; silica minerals; silicates; spectra; TEM data; temperature; water; water content DO - http://dx.doi.org/10.1127/ejm/2015/0027-2428 ER - TY - JOUR T1 - Development of a robust and automated infrasound event catalogue using the International Monitoring System AN - 1680753156; 2015-041980 AB - Methods for detecting, associating and locating infrasound events recorded on the global International Monitoring System (IMS) infrasound network are presented. By using likelihood arguments, and reducing the use of empirically determined parameters, our techniques enable us to formally quantify the false alarm rate at both station and network levels, and to calculate confidence areas for event localization. We outline a new association technique that uses graph theory for associating arrivals at multiple spatially separated stations, and perform Monte Carlo simulations to quantify the performance of the scheme under different scenarios. The detection, association and location techniques are applied to 10 large events in the Reviewed Event Bulletin of the Comprehensive Nuclear Test Ban Treaty Organization. Out of 10 events, a total of seven were automatically detected and associated. By analysing the three missed events, we identify improvements that might be made to improve the algorithms. JF - Geophysical Journal International AU - Arrowsmith, Stephen AU - Euler, Garrett AU - Marcillo, Omar AU - Blom, Philip AU - Whitaker, Rod AU - Randall, George Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 1411 EP - 1422 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 200 IS - 3 SN - 0956-540X, 0956-540X KW - monitoring KW - localization KW - time series analysis KW - explosions KW - Monte Carlo analysis KW - global KW - statistical analysis KW - infrasound waves KW - detection KW - nuclear explosions KW - acoustical waves KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680753156?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Development+of+a+robust+and+automated+infrasound+event+catalogue+using+the+International+Monitoring+System&rft.au=Arrowsmith%2C+Stephen%3BEuler%2C+Garrett%3BMarcillo%2C+Omar%3BBlom%2C+Philip%3BWhitaker%2C+Rod%3BRandall%2C+George&rft.aulast=Arrowsmith&rft.aufirst=Stephen&rft.date=2015-03-01&rft.volume=200&rft.issue=3&rft.spage=1411&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu486 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 27 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - acoustical waves; Comprehensive Test Ban Treaty; detection; explosions; global; infrasound waves; localization; monitoring; Monte Carlo analysis; nuclear explosions; statistical analysis; time series analysis DO - http://dx.doi.org/10.1093/gji/ggu486 ER - TY - JOUR T1 - Genomic sequences of six botulinum neurotoxin-producing strains representing three clostridial species illustrate the mobility and diversity of botulinum neurotoxin genes. AN - 1652456245; 25489752 AB - The whole genomes for six botulinum neurotoxin-producing clostridial strains were sequenced to provide references for under-represented toxin types, bivalent strains or unusual toxin complexes associated with a bont gene. The strains include three Clostridium botulinum Group I strains (CDC 297, CDC 1436, and Prevot 594), a Group II C. botulinum strain (Eklund 202F), a Group IV Clostridium argentinense strain (CDC 2741), and a Group V Clostridium baratii strain (Sullivan). Comparisons of the Group I genomic sequences revealed close relationships and conservation of toxin gene locations with previously published Group I C. botulinum genomes. The bont/F6 gene of strain Eklund 202F was determined to be a chimeric toxin gene composed of bont/F1 and bont/F2. The serotype G strain CDC 2741 remained unfinished in 20 contigs with the bont/G located within a 1.15Mb contig, indicating a possible chromosomal location for this toxin gene. Within the genome of C. baratii Sullivan strain, direct repeats of IS1182 insertion sequence (IS) elements were identified flanking the bont/F7 toxin complex that may be the mechanism of bont insertion into C. baratii. Highlights of the six strains are described and release of their genomic sequences will allow further study of unusual neurotoxin-producing clostridial strains. JF - Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases AU - Smith, Theresa J AU - Hill, Karen K AU - Xie, Gary AU - Foley, Brian T AU - Williamson, Charles H D AU - Foster, Jeffrey T AU - Johnson, Shannon L AU - Chertkov, Olga AU - Teshima, Hazuki AU - Gibbons, Henry S AU - Johnsky, Lauren A AU - Karavis, Mark A AU - Smith, Leonard A AD - Molecular and Translational Sciences Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD 21702, United States. Electronic address: theresa.j.smith.civ@mail.mil. ; Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States. ; Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States. ; Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, AZ 86011, United States. ; Biosciences Division, Edgewood Chemical Biological Center, Aberdeen Proving Ground, MD 21010, United States. ; Medical Countermeasures Technology, United States Army Medical Research and Material Command, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD 21702, United States. Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 102 EP - 113 VL - 30 KW - DNA, Bacterial KW - 0 KW - Botulinum Toxins KW - EC 3.4.24.69 KW - Index Medicus KW - Clostridium baratii KW - Clostridium argentinense KW - Clostridium botulinum KW - Botulinum neurotoxin KW - Phylogeny KW - Multigene Family -- genetics KW - Food Microbiology KW - Sequence Alignment KW - Humans KW - DNA, Bacterial -- genetics KW - Clostridium Infections -- microbiology KW - Environmental Microbiology KW - Genome, Bacterial -- genetics KW - Botulinum Toxins -- genetics KW - Clostridium -- pathogenicity KW - Gene Transfer, Horizontal -- genetics KW - Clostridium -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1652456245?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Infection%2C+genetics+and+evolution+%3A+journal+of+molecular+epidemiology+and+evolutionary+genetics+in+infectious+diseases&rft.atitle=Genomic+sequences+of+six+botulinum+neurotoxin-producing+strains+representing+three+clostridial+species+illustrate+the+mobility+and+diversity+of+botulinum+neurotoxin+genes.&rft.au=Smith%2C+Theresa+J%3BHill%2C+Karen+K%3BXie%2C+Gary%3BFoley%2C+Brian+T%3BWilliamson%2C+Charles+H+D%3BFoster%2C+Jeffrey+T%3BJohnson%2C+Shannon+L%3BChertkov%2C+Olga%3BTeshima%2C+Hazuki%3BGibbons%2C+Henry+S%3BJohnsky%2C+Lauren+A%3BKaravis%2C+Mark+A%3BSmith%2C+Leonard+A&rft.aulast=Smith&rft.aufirst=Theresa&rft.date=2015-03-01&rft.volume=30&rft.issue=&rft.spage=102&rft.isbn=&rft.btitle=&rft.title=Infection%2C+genetics+and+evolution+%3A+journal+of+molecular+epidemiology+and+evolutionary+genetics+in+infectious+diseases&rft.issn=1567-7257&rft_id=info:doi/10.1016%2Fj.meegid.2014.12.002 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-09-25 N1 - Date created - 2015-02-03 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.meegid.2014.12.002 ER - TY - JOUR T1 - First detection of fluorine on Mars; implications for Gale Crater's geochemistry AN - 1707522135; 2015-084206 AB - Volatiles and especially halogens (F and Cl) have been recognized as important species in the genesis and melting of planetary magmas. Data from the Chemical Camera instrument on board the Mars Science Laboratory rover Curiosity now provide the first in situ analyses of fluorine at the surface of Mars. Two principal F-bearing mineral assemblages are identified. The first is associated with high aluminum and low calcium contents, in which the F-bearing phase is an aluminosilicate. It is found in conglomerates and may indicate petrologically evolved sources. This is the first time that such a petrologic environment is found on Mars. The second is represented by samples that have high calcium contents, in which the main F-bearing minerals are likely to be fluorapatites and/or fluorites. Fluorapatites are found in some sandstone and may be detrital, while fluorites are also found in the conglomerates, possibly indicating low-T alteration processes. Abstract Copyright (2015), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Forni, Olivier AU - Gaft, Michael AU - Toplis, Michael J AU - Clegg, Samuel M AU - Maurice, Sylvestre AU - Wiens, Roger C AU - Mangold, Nicolas AU - Gasnault, Olivier AU - Sautter, Violaine AU - Le Mouelic, Stephane AU - Meslin, Pierre-Yves AU - Nachon, Marion AU - McInroy, Rhonda E AU - Ollila, Ann M AU - Cousin, Agnes AU - Bridges, John C AU - Lanza, Nina L AU - Dyar, Melinda D Y1 - 2015/02/28/ PY - 2015 DA - 2015 Feb 28 SP - 1020 EP - 1028 PB - American Geophysical Union, Washington, DC VL - 42 IS - 4 SN - 0094-8276, 0094-8276 KW - impact features KW - halogens KW - Mars KW - conglomerate KW - Gale Crater KW - terrestrial planets KW - planets KW - volatiles KW - sedimentary rocks KW - fluorine KW - surface features KW - impact craters KW - chemical composition KW - geochemistry KW - clastic rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707522135?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=First+detection+of+fluorine+on+Mars%3B+implications+for+Gale+Crater%27s+geochemistry&rft.au=Forni%2C+Olivier%3BGaft%2C+Michael%3BToplis%2C+Michael+J%3BClegg%2C+Samuel+M%3BMaurice%2C+Sylvestre%3BWiens%2C+Roger+C%3BMangold%2C+Nicolas%3BGasnault%2C+Olivier%3BSautter%2C+Violaine%3BLe+Mouelic%2C+Stephane%3BMeslin%2C+Pierre-Yves%3BNachon%2C+Marion%3BMcInroy%2C+Rhonda+E%3BOllila%2C+Ann+M%3BCousin%2C+Agnes%3BBridges%2C+John+C%3BLanza%2C+Nina+L%3BDyar%2C+Melinda+D&rft.aulast=Forni&rft.aufirst=Olivier&rft.date=2015-02-28&rft.volume=42&rft.issue=4&rft.spage=1020&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL062742 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 40 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-08-27 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - chemical composition; clastic rocks; conglomerate; fluorine; Gale Crater; geochemistry; halogens; impact craters; impact features; Mars; planets; sedimentary rocks; surface features; terrestrial planets; volatiles DO - http://dx.doi.org/10.1002/2014GL062742 ER - TY - JOUR T1 - Deep fluid circulation within crystalline basement rocks and the role of hydrologic windows in the formation of the Truth or Consequences, New Mexico low-temperature geothermal system AN - 1855316737; 2017-001771 AB - Hot springs can occur in amagmatic settings, but the mechanisms of heating are often obscure. We have investigated the origin of the Truth or Consequences, New Mexico low-temperature (approximately 41 degrees C) hot springs in the southern Rio Grande Rift. We tested two hypotheses that could account for this amagmatic geothermal anomaly: lateral forced convection in a gently dipping carbonate aquifer and circulation through high-permeability crystalline basement rocks to depths of 8 km that is then focused through an overlying faulted hydrologic window. These hypotheses were tested using a regional two-dimensional hydrothermal model. Model parameters were constrained by calibrating to measured temperatures, specific discharge rates, and groundwater residence times. We collected 16 temperature profiles, 11 geochemistry samples, and 6 carbon-14 samples within the study area. The geothermal waters are Na (super +) /Cl (super -) -dominated and have apparent groundwater ages ranging from 5500 to 11 500 years. Hot-spring geochemistry is consistent with water/rock interaction in a silicate geothermal reservoir, rather than a carbonate system. Peclet number analysis of temperature profiles suggests that specific discharge rates beneath Truth or Consequences range from 2 to 4 m year (super -1) . Geothermometry indicates maximum reservoir temperatures are around 170 degrees C. Observed measurements were reasonably reproduced using the deep circulation permeable-basement modeling scenario (10 (super -12) m (super 2) ) but not the lateral forced-convection carbonate-aquifer scenario. Focused geothermal discharge is the result of localized faulting, which has created a hydrologic window through a regional confining unit. In tectonically active areas, such as the Rio Grande Rift, deep groundwater circulation within fractured crystalline basement may play a more prominent role in the formation of geothermal systems than has generally been acknowledged. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - Geofluids (Oxford) AU - Pepin, J AU - Person, M AU - Phillips, F AU - Kelley, S AU - Timmons, S AU - Owens, L AU - Witcher, J AU - Gable, C Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 139 EP - 160 PB - Wiley-Blackwell, Oxford VL - 15 IS - 1-2 SN - 1468-8115, 1468-8115 KW - United States KW - geologic thermometry KW - New Mexico KW - temperature KW - ground water KW - Rio Grande Rift KW - sedimentary rocks KW - neotectonics KW - geothermal systems KW - thermal anomalies KW - circulation KW - crystalline rocks KW - springs KW - hydrodynamics KW - Sierra County New Mexico KW - confining beds KW - tectonics KW - discharge KW - geochemistry KW - Peclet number KW - North America KW - numerical models KW - basement KW - fluid flow KW - convection KW - depth KW - two-dimensional models KW - thermal waters KW - aquifers KW - geothermal energy KW - residence time KW - Truth or Consequences New Mexico KW - low temperature KW - hot springs KW - carbonate rocks KW - permeability KW - 29A:Economic geology, geology of energy sources KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855316737?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geofluids+%28Oxford%29&rft.atitle=Deep+fluid+circulation+within+crystalline+basement+rocks+and+the+role+of+hydrologic+windows+in+the+formation+of+the+Truth+or+Consequences%2C+New+Mexico+low-temperature+geothermal+system&rft.au=Pepin%2C+J%3BPerson%2C+M%3BPhillips%2C+F%3BKelley%2C+S%3BTimmons%2C+S%3BOwens%2C+L%3BWitcher%2C+J%3BGable%2C+C&rft.aulast=Pepin&rft.aufirst=J&rft.date=2015-02-01&rft.volume=15&rft.issue=1-2&rft.spage=139&rft.isbn=&rft.btitle=&rft.title=Geofluids+%28Oxford%29&rft.issn=14688115&rft_id=info:doi/10.1111%2Fgfl.12111 L2 - http://www.blackwellpublishing.com/journal.asp?ref=1468-8115 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 64 N1 - Document feature - illus. incl. sects., 5 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2017-01-05 N1 - SubjectsTermNotLitGenreText - aquifers; basement; carbonate rocks; circulation; confining beds; convection; crystalline rocks; depth; discharge; fluid flow; geochemistry; geologic thermometry; geothermal energy; geothermal systems; ground water; hot springs; hydrodynamics; low temperature; neotectonics; New Mexico; North America; numerical models; Peclet number; permeability; residence time; Rio Grande Rift; sedimentary rocks; Sierra County New Mexico; springs; tectonics; temperature; thermal anomalies; thermal waters; Truth or Consequences New Mexico; two-dimensional models; United States DO - http://dx.doi.org/10.1111/gfl.12111 ER - TY - JOUR T1 - Impacts of a mushy-layer thermodynamic approach in global sea-ice simulations using the CICE sea-ice model AN - 1832668204; 726453-40 AB - We perform global simulations of the Los Alamos sea-ice model, CICE, with a new thermodynamics component that has a fully prognostic, variable bulk salinity vertical profile based on mushy layer physics. The processes of gravity drainage, melt-water flushing and snow-ice formation are parameterized to allow the bulk salinity to evolve with time. We analyze the seasonal and spatial variation of sea-ice bulk salinity, area, volume and thickness and compare these quantities to simulations using the previous thermodynamic component. Adjusting one of the gravity drainage parameters, we find good agreement between simulation results and fieldwork ice-core observations of sea-ice bulk salinity. As expected, bulk salinity is highest during periods of ice growth and lowest after periods of ice melt. In the northern hemisphere the new thermodynamics component produces thicker ice than the previous thermodynamics component. Of the nine major differences between the two models, differences in how salinities are calculated and how melt-pond flushing is parameterized are the principal causes of this thickness difference. Thickness differences are smaller in the southern hemisphere than in the northern hemisphere since a greater fraction of ice melts, and differences cannot accumulate year-on-year. Model differences in how ice thickness changes and snow-ice formation are calculated are the most important causes of the different thickness between the two thermodynamic components in the southern hemisphere. The melt-pond area and volume are found to be highly sensitive to a parameter choice controlling drainage through macroscopic holes in the ice, in both hemispheres. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Turner, Adrian K AU - Hunke, Elizabeth C Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 1253 EP - 1275 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 2 SN - 2169-9275, 2169-9275 KW - ice cover thickness KW - ice KW - snow KW - sea ice KW - ice cover KW - seasonal variations KW - thermodynamic properties KW - salinity KW - temperature KW - meltwater KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832668204?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Impacts+of+a+mushy-layer+thermodynamic+approach+in+global+sea-ice+simulations+using+the+CICE+sea-ice+model&rft.au=Turner%2C+Adrian+K%3BHunke%2C+Elizabeth+C&rft.aulast=Turner&rft.aufirst=Adrian&rft.date=2015-02-01&rft.volume=120&rft.issue=2&rft.spage=1253&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2014JC010358 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Number of references - 40 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - ice; ice cover; ice cover thickness; meltwater; salinity; sea ice; seasonal variations; snow; temperature; thermodynamic properties DO - http://dx.doi.org/10.1002/2014JC010358 ER - TY - JOUR T1 - Seismicity and structure of Akutan and Makushin Volcanoes, Alaska, using joint body and surface wave tomography AN - 1707521944; 2015-084252 AB - Joint inversions of seismic data recover models that simultaneously fit multiple constraints while playing upon the strengths of each data type. Here we jointly invert 14 years of local earthquake body wave arrival times from the Alaska Volcano Observatory catalog and Rayleigh wave dispersion curves based upon ambient noise measurements for local V (sub p) , V (sub s) , and hypocentral locations at Akutan and Makushin Volcanoes using a new joint inversion algorithm. The velocity structure and relocated seismicity of both volcanoes are significantly more complex than many other volcanoes studied using similar techniques. Seismicity is distributed among several areas beneath or beyond the flanks of both volcanoes, illuminating a variety of volcanic and tectonic features. The velocity structures of the two volcanoes are exemplified by the presence of narrow high-V (sub p) features in the near surface, indicating likely current or remnant pathways of magma to the surface. A single broad low-V (sub p) region beneath each volcano is slightly offset from each summit and centered at approximately 7 km depth, indicating a potential magma chamber, where magma is stored over longer time periods. Differing recovery capabilities of the V (sub p) and V (sub s) data sets indicate that the results of these types of joint inversions must be interpreted carefully. Abstract Copyright (2015), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Syracuse, E M AU - Maceira, M AU - Zhang, H AU - Thurber, C H Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 1036 EP - 1052 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 2 SN - 2169-9313, 2169-9313 KW - United States KW - tomography KW - Makushin KW - guided waves KW - Akutan KW - elastic waves KW - surface waves KW - seismicity KW - volcanoes KW - focus KW - Alaska KW - tectonics KW - seismic waves KW - Aleutian Islands KW - earthquakes KW - seismotectonics KW - Unalaska Island KW - 24:Quaternary geology KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707521944?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Seismicity+and+structure+of+Akutan+and+Makushin+Volcanoes%2C+Alaska%2C+using+joint+body+and+surface+wave+tomography&rft.au=Syracuse%2C+E+M%3BMaceira%2C+M%3BZhang%2C+H%3BThurber%2C+C+H&rft.aulast=Syracuse&rft.aufirst=E&rft.date=2015-02-01&rft.volume=120&rft.issue=2&rft.spage=1036&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2014JB011616 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2015-08-27 N1 - SubjectsTermNotLitGenreText - Akutan; Alaska; Aleutian Islands; earthquakes; elastic waves; focus; guided waves; Makushin; seismic waves; seismicity; seismotectonics; surface waves; tectonics; tomography; Unalaska Island; United States; volcanoes DO - http://dx.doi.org/10.1002/2014JB011616 ER - TY - JOUR T1 - Modelling infrasound signal generation from two underground explosions at the source physics experiment using the Rayleigh integral AN - 1686062575; 2015-049724 AB - We use the Rayleigh integral (RI) as an approximation to the Helmholtz-Kirchoff integral to model infrasound generation and propagation from underground chemical explosions at distances of 250 m out to 5 km as part of the Source Physics Experiment (SPE). Using a sparse network of surface accelerometers installed above ground zero, we are able to accurately create synthetic acoustic waveforms and compare them to the observed data. Although the underground explosive sources were designed to be symmetric, the resulting seismic wave at the surface shows an asymmetric propagation pattern that is stronger to the northeast of the borehole. This asymmetric bias may be attributed to the subsurface geology and faulting of the area and is observed in the acoustic waveforms. We compare observed and modeled results from two of the underground SPE tests with a sensitivity study to evaluate the asymmetry observed in the data. This work shows that it is possible to model infrasound signals from underground explosive sources using the RI and that asymmetries observed in the data can be modeled with this technique. JF - Geophysical Journal International AU - Jones, Kyle R AU - Whitaker, Rodney W AU - Arrowsmith, Stephen J Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 777 EP - 788 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 200 IS - 2 SN - 0956-540X, 0956-540X KW - technology KW - monitoring KW - time series analysis KW - explosions KW - statistical analysis KW - acceleration KW - elastic waves KW - seismic sources KW - models KW - seismicity KW - ground motion KW - propagation KW - seismic waves KW - earthquakes KW - acoustical waves KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686062575?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Modelling+infrasound+signal+generation+from+two+underground+explosions+at+the+source+physics+experiment+using+the+Rayleigh+integral&rft.au=Jones%2C+Kyle+R%3BWhitaker%2C+Rodney+W%3BArrowsmith%2C+Stephen+J&rft.aulast=Jones&rft.aufirst=Kyle&rft.date=2015-02-01&rft.volume=200&rft.issue=2&rft.spage=777&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu433 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 16 N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2015-06-05 N1 - SubjectsTermNotLitGenreText - acceleration; acoustical waves; Comprehensive Test Ban Treaty; earthquakes; elastic waves; explosions; ground motion; models; monitoring; propagation; seismic sources; seismic waves; seismicity; statistical analysis; technology; time series analysis DO - http://dx.doi.org/10.1093/gji/ggu433 ER - TY - JOUR T1 - Texture and elastic anisotropy of a mylonitic anorthosite from the Morin shear zone (Quebec, Canada) AN - 1676590950; 2015-039688 AB - A sample of anorthosite from the granulite facies Morin Shear Zone (Quebec, Canada) was investigated for crystal preferred orientation and elastic anisotropy. Time-of-flight neutron diffraction data obtained with the HIPPO diffractometer at LANSCE were analyzed with the Rietveld method to obtain orientation distribution functions of the principal phases (plagioclase, clinopyroxene and orthopyroxene). Texture and microstructures are compatible with the plastic deformation of the aggregate under high-T conditions. All mineral phases depict a significant preferred orientation that could be related to the general top-to-the north shearing history of the Morin Shear Zone. Texture patterns suggest that (010)[001] in plagioclase and (110)[001] in clinopyroxene are likely dominant slip systems. Using preferred orientation data P- and S-waves velocities and elastic anisotropy were calculated and compared with previous studies to explore elastic properties of rocks with different pyroxene-plagioclase mixtures. P-wave velocity, S-wave splitting and anisotropy increase with clinopyroxene content. Seismic anisotropy is linked to the texture symmetry which can lead to large deviations between actual anisotropy and that measured along Cartesian XYZ sample directions (lineation/foliation reference frame). This is significant for the prediction and interpretation of seismic data, particularly for monoclinic or triclinic texture symmetries. Abstract Copyright (2015) Elsevier, B.V. JF - Journal of Structural Geology AU - Gomez Barreiro, Juan AU - Wenk, Hans-Rudolf AU - Vogel, Sven Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 100 EP - 111 PB - Elsevier, Oxford VL - 71 SN - 0191-8141, 0191-8141 KW - silicates KW - P-waves KW - Morin shear zone KW - Quebec KW - igneous rocks KW - elastic properties KW - techniques KW - elastic waves KW - preferred orientation KW - pyroxene group KW - plutonic rocks KW - clinopyroxene KW - metamorphic rocks KW - velocity KW - framework silicates KW - Canadian Shield KW - chain silicates KW - lineation KW - North America KW - Grenville Province KW - body waves KW - plagioclase KW - textures KW - structural analysis KW - mylonites KW - anorthosite KW - wave splitting KW - Canada KW - neutron diffraction data KW - foliation KW - symmetry KW - seismic waves KW - Eastern Canada KW - feldspar group KW - S-waves KW - instruments KW - anisotropy KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676590950?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Structural+Geology&rft.atitle=Texture+and+elastic+anisotropy+of+a+mylonitic+anorthosite+from+the+Morin+shear+zone+%28Quebec%2C+Canada%29&rft.au=Gomez+Barreiro%2C+Juan%3BWenk%2C+Hans-Rudolf%3BVogel%2C+Sven&rft.aulast=Gomez+Barreiro&rft.aufirst=Juan&rft.date=2015-02-01&rft.volume=71&rft.issue=&rft.spage=100&rft.isbn=&rft.btitle=&rft.title=Journal+of+Structural+Geology&rft.issn=01918141&rft_id=info:doi/10.1016%2Fj.jsg.2014.07.021 L2 - http://www.sciencedirect.com/science/journal/01918141 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 95 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-04-30 N1 - CODEN - JSGEDY N1 - SubjectsTermNotLitGenreText - anisotropy; anorthosite; body waves; Canada; Canadian Shield; chain silicates; clinopyroxene; Eastern Canada; elastic properties; elastic waves; feldspar group; foliation; framework silicates; Grenville Province; igneous rocks; instruments; lineation; metamorphic rocks; Morin shear zone; mylonites; neutron diffraction data; North America; P-waves; plagioclase; plutonic rocks; preferred orientation; pyroxene group; Quebec; S-waves; seismic waves; silicates; structural analysis; symmetry; techniques; textures; velocity; wave splitting DO - http://dx.doi.org/10.1016/j.jsg.2014.07.021 ER - TY - JOUR T1 - Grit-mediated frictional ignition of a polymer-bonded explosive during oblique impacts: Probability calculations for safety engineering AN - 1673396240; PQ0001342740 AB - Frictional heating of high-melting-point grit particles during oblique impacts of consolidated explosives is considered to be the major source of ignition in accidents involving dropped explosives. It has been shown in other work that the lower temperature melting point of two frictionally interacting surfaces will cap the maximum temperature reached, which provides a simple way to mitigate the danger in facilities by implementing surfaces with melting points below the ignition temperature of the explosive. However, a recent series of skid testing experiments has shown that ignition can occur on low-melting-point surfaces with a high concentration of grit particles, most likely due to a grit-grit collision mechanism. For risk-based safety engineering purposes, the authors present a method to estimate the probability of grit contact and/or grit-grit collision during an oblique impact. These expressions are applied to potentially high-consequence oblique impact scenarios in order to give the probability of striking one or more grit particles (for high-melting-point surfaces), or the probability of one or more grit-grit collisions occurring (for low-melting-point surfaces). The probability is dependent on a variety of factors, many of which can be controlled for mitigation to achieve acceptable risk levels for safe explosives handling operations. JF - Reliability Engineering & System Safety AU - Heatwole, Eric AU - Parker, Gary AU - Holmes, Matt AU - Dickson, Peter AD - Los Alamos National Laboratory, WX-6, Los Alamos, NM 87S45, USA, heatwole@lanl.gov Y1 - 2015/02// PY - 2015 DA - Feb 2015 SP - 10 EP - 18 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 134 SN - 0951-8320, 0951-8320 KW - Risk Abstracts; Health & Safety Science Abstracts KW - Friction KW - Hot spots KW - PBX 9501 KW - Explosives KW - Skid test KW - Oblique impact KW - Melting point KW - Mitigation KW - Accidents KW - Safety engineering KW - Risk factors KW - Safety KW - Occupational safety KW - Temperature KW - Particulates KW - H 2000:Transportation KW - R2 23010:General: Models, forecasting UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673396240?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Grit-mediated+frictional+ignition+of+a+polymer-bonded+explosive+during+oblique+impacts%3A+Probability+calculations+for+safety+engineering&rft.au=Heatwole%2C+Eric%3BParker%2C+Gary%3BHolmes%2C+Matt%3BDickson%2C+Peter&rft.aulast=Heatwole&rft.aufirst=Eric&rft.date=2015-02-01&rft.volume=134&rft.issue=&rft.spage=10&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/10.1016%2Fj.ress.2014.09.023 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-04-01 N1 - Last updated - 2015-04-29 N1 - SubjectsTermNotLitGenreText - Melting point; Accidents; Mitigation; Safety engineering; Risk factors; Occupational safety; Safety; Temperature; Particulates; Explosives DO - http://dx.doi.org/10.1016/j.ress.2014.09.023 ER - TY - JOUR T1 - ChemCam; chemostratigraphy by the first Mars microprobe AN - 1673366032; 2015-034336 AB - The ChemCam laser-induced breakdown spectrometer on the rover Curiosity has provided more than 200,000 spectra from over 5000 different locations on Mars. This instrument is the first chemical microprobe on Mars and has an analytical footprint 0.3-0.6 mm in diameter. ChemCam has observed a measure of hydration in all the sedimentary materials encountered along the rover traverse in Gale Crater, indicating the ubiquity of phyllosilicates as a constituent of the analyzed sandstones, mudstones, and conglomerates. Diagenetic features, including calcium sulfate veins, millimeter-thick magnesium-rich diagenetic ridges, and manganese-rich rock surfaces, provide clues to water-rock interactions. Float clasts of coarse-grained igneous rocks are rich in alkali feldspars and some are enriched in fluorine, indicating greater magmatic evolution than expected on Mars. The identification of individual soil components has contributed to our understanding of the evolution of Martian soil. These observations have broadened our understanding of Mars as an active and once habitable planet. JF - Elements AU - Wiens, Roger C AU - Maurice, Sylvestre Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 33 EP - 38 PB - Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society VL - 11 IS - 1 SN - 1811-5209, 1811-5209 KW - silicates KW - calcium sulfate KW - sandstone KW - Mars KW - Gale Crater KW - emission spectra KW - sedimentary rocks KW - major elements KW - water-rock interaction KW - Curiosity Rover KW - chemostratigraphy KW - LIBS spectra KW - ChemCam KW - spectra KW - trace elements KW - chemical composition KW - geochemistry KW - soils KW - mudstone KW - smectite KW - conglomerate KW - clay minerals KW - terrestrial planets KW - planets KW - hydration KW - diagenesis KW - Mars Science Laboratory KW - sheet silicates KW - clastic rocks KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366032?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Elements&rft.atitle=ChemCam%3B+chemostratigraphy+by+the+first+Mars+microprobe&rft.au=Wiens%2C+Roger+C%3BMaurice%2C+Sylvestre&rft.aulast=Wiens&rft.aufirst=Roger&rft.date=2015-02-01&rft.volume=11&rft.issue=1&rft.spage=33&rft.isbn=&rft.btitle=&rft.title=Elements&rft.issn=18115209&rft_id=info:doi/10.2113%2Fgselements.11.1.33 L2 - http://www.elementsmagazine.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 28 N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - calcium sulfate; ChemCam; chemical composition; chemostratigraphy; clastic rocks; clay minerals; conglomerate; Curiosity Rover; diagenesis; emission spectra; Gale Crater; geochemistry; hydration; instruments; LIBS spectra; major elements; Mars; Mars Science Laboratory; mudstone; planets; sandstone; sedimentary rocks; sheet silicates; silicates; smectite; soils; spectra; terrestrial planets; trace elements; water-rock interaction DO - http://dx.doi.org/10.2113/gselements.11.1.33 ER - TY - JOUR T1 - Adaptation Genomics of a Small-Colony Variant in a Pseudomonas chlororaphis 30-84 Biofilm AN - 1660410323; PQ0001092274 AB - The rhizosphere-colonizing bacterium Pseudomonas chlororaphis 30-84 is an effective biological control agent against take-all disease of wheat. In this study, we characterize a small-colony variant (SCV) isolated from a P. chlororaphis 30-84 biofilm. The SCV exhibited pleiotropic phenotypes, including small cell size, slow growth and motility, low levels of phenazine production, and increased biofilm formation and resistance to antimicrobials. To better understand the genetic alterations underlying these phenotypes, RNA and whole-genome sequencing analyses were conducted comparing an SCV to the wild-type strain. Of the genome's 5,971 genes, transcriptomic profiling indicated that 1,098 (18.4%) have undergone substantial reprograming of gene expression in the SCV. Whole-genome sequence analysis revealed multiple alterations in the SCV, including mutations in yfiR (cyclic-di-GMP production), fusA (elongation factor), and cyoE (heme synthesis) and a 70-kb deletion. Genetic analysis revealed that the yfiR locus plays a major role in controlling SCV phenotypes, including colony size, growth, motility, and biofilm formation. Moreover, a point mutation in the fusA gene contributed to kanamycin resistance. Interestingly, the SCV can partially switch back to wild-type morphologies under specific conditions. Our data also support the idea that phenotypic switching in P. chlororaphis is not due to simple genetic reversions but may involve multiple secondary mutations. The emergence of these highly adherent and antibiotic-resistant SCVs within the biofilm might play key roles in P. chlororaphis natural persistence. JF - Applied and Environmental Microbiology AU - Wang, Dongping AU - Dorosky, Robert J AU - Han, Cliff S AU - Lo, Chien-chi AU - Dichosa, Armand EK AU - Chain, Patrick S AU - Yu, Jun Myoung AU - Pierson, Leland S, III AU - Pierson, Elizabeth A AD - Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA, eapierson@tamu.edu. PY - 2015 SP - 890 EP - 899 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 United States VL - 81 IS - 3 SN - 0099-2240, 0099-2240 KW - Microbiology Abstracts B: Bacteriology; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Biological control KW - Take-all disease KW - Data processing KW - Adaptations KW - Heme KW - Genetic analysis KW - Point mutation KW - Reversion KW - Kanamycin KW - Antimicrobial agents KW - Triticum aestivum KW - Elongation KW - Motility KW - Colonies KW - RNA KW - Cell size KW - Pseudomonas chlororaphis KW - genomics KW - Biofilms KW - Phenazine KW - A 01370:Biological Control KW - J 02320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660410323?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+and+Environmental+Microbiology&rft.atitle=Adaptation+Genomics+of+a+Small-Colony+Variant+in+a+Pseudomonas+chlororaphis+30-84+Biofilm&rft.au=Wang%2C+Dongping%3BDorosky%2C+Robert+J%3BHan%2C+Cliff+S%3BLo%2C+Chien-chi%3BDichosa%2C+Armand+EK%3BChain%2C+Patrick+S%3BYu%2C+Jun+Myoung%3BPierson%2C+Leland+S%2C+III%3BPierson%2C+Elizabeth+A&rft.aulast=Wang&rft.aufirst=Dongping&rft.date=2015-02-01&rft.volume=81&rft.issue=3&rft.spage=890&rft.isbn=&rft.btitle=&rft.title=Applied+and+Environmental+Microbiology&rft.issn=00992240&rft_id=info:doi/10.1128%2FAEM.02617-14 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Number of references - 42 N1 - Last updated - 2016-01-21 N1 - SubjectsTermNotLitGenreText - Biological control; Take-all disease; Adaptations; Data processing; Heme; Point mutation; Genetic analysis; Reversion; Kanamycin; Antimicrobial agents; Elongation; Colonies; Motility; RNA; Cell size; Biofilms; genomics; Phenazine; Triticum aestivum; Pseudomonas chlororaphis DO - http://dx.doi.org/10.1128/AEM.02617-14 ER - TY - JOUR T1 - Performance analysis of a 3D unstructured mesh hydrodynamics code on multi-core and many-core architectures AN - 1654670620; PQ0001048593 AB - Several next generation high performance computing platforms are or will be based on the so-called many-core architectures, which represent a significant departure from commodity multi-core architectures. A key issue in transitioning large-scale simulation codes from multi-core to many-core systems is closing the serial performance gap, that is, overcoming the large difference in single-core performance between multi-core and many-core systems. In this paper, we discuss how this problem was addressed for a 3D unstructured mesh hydrodynamics code, describe how Amdahl's law can be used to estimate performance targets and guide optimization efforts, and present timing studies performed on multi-core and many-core platforms. Published 2014. This article is a U.S. Government work and is in the public domain in the USA. We present a performance analysis of a 3D unstructured mesh hydrodynamics code on multi-core and many-core architectures. A single programming model is demonstrated to be suitable for both architectures via performance comparisons on a number of standard test problems. JF - International Journal for Numerical Methods in Fluids AU - Waltz, J AU - Wohlbier, J G AU - Risinger, L D AU - Canfield, T R AU - Charest, MRJ AU - Long, A R AU - Morgan, N R AD - X Computational Physics Division, Los Alamos National Laboratory, USA. Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 319 EP - 333 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 77 IS - 6 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Timing KW - Hydrodynamics KW - Architecture KW - Model Testing KW - Model Studies KW - USA KW - Performance Evaluation KW - Planning KW - Fluid dynamics KW - Standards KW - Optimization KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - Q2 09169:Fluid mechanics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1654670620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=Performance+analysis+of+a+3D+unstructured+mesh+hydrodynamics+code+on+multi-core+and+many-core+architectures&rft.au=Waltz%2C+J%3BWohlbier%2C+J+G%3BRisinger%2C+L+D%3BCanfield%2C+T+R%3BCharest%2C+MRJ%3BLong%2C+A+R%3BMorgan%2C+N+R&rft.aulast=Waltz&rft.aufirst=J&rft.date=2015-02-01&rft.volume=77&rft.issue=6&rft.spage=319&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.3982 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-02-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Hydrodynamics; Planning; Fluid dynamics; Timing; Performance Evaluation; Architecture; Standards; Model Testing; Optimization; Model Studies; USA DO - http://dx.doi.org/10.1002/fld.3982 ER - TY - JOUR T1 - Emergency department management of patients internally contaminated with radioactive material. AN - 1652391242; 25455668 AB - After a radiation emergency that involves the dispersal of radioactive material, patients can become externally and internally contaminated with 1 or more radionuclides. Internal contamination can lead to the delivery of harmful ionizing radiation doses to various organs and tissues or the whole body. The clinical consequences can range from acute radiation syndrome to the long-term development of cancer. Estimating the amount of radioactive material absorbed into the body can guide the management of patients. Treatment includes, in addition to supportive care and long term monitoring, certain medical countermeasures like Prussian blue, calcium diethylenetriamine pentaacetic acid (DTPA) and zinc DTPA. JF - Emergency medicine clinics of North America AU - Kazzi, Ziad AU - Buzzell, Jennifer AU - Bertelli, Luiz AU - Christensen, Doran AD - National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, Northeast, MS-F59, Atlanta, GA 30341-3717, USA; Department of Emergency Medicine, Emory University, 531 Asbury Cir-Annex, Suite N-340, Atlanta, GA 30322, USA. Electronic address: ZKAZZI@emory.edu. ; National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, Northeast, MS-F59, Atlanta, GA 30341-3717, USA. ; Los Alamos National Laboratory, Mailstop G761, Los Alamos, NM 87545, USA. ; Radiation Emergency Assistance Center/Training Site, PO Box 117, Oak Ridge TN 37831, USA. Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 179 EP - 196 VL - 33 IS - 1 KW - Chelating Agents KW - 0 KW - Index Medicus KW - Radiation dosage KW - Contamination KW - Radioactive terrorism KW - Chelation therapy KW - Radioactive elements KW - Decontamination -- methods KW - Chelating Agents -- therapeutic use KW - Humans KW - Disasters KW - Environmental Exposure -- adverse effects KW - Radioactive Hazard Release KW - Radiation Injuries -- therapy KW - Emergency Service, Hospital UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1652391242?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Emergency+medicine+clinics+of+North+America&rft.atitle=Emergency+department+management+of+patients+internally+contaminated+with+radioactive+material.&rft.au=Kazzi%2C+Ziad%3BBuzzell%2C+Jennifer%3BBertelli%2C+Luiz%3BChristensen%2C+Doran&rft.aulast=Kazzi&rft.aufirst=Ziad&rft.date=2015-02-01&rft.volume=33&rft.issue=1&rft.spage=179&rft.isbn=&rft.btitle=&rft.title=Emergency+medicine+clinics+of+North+America&rft.issn=1558-0539&rft_id=info:doi/10.1016%2Fj.emc.2014.09.008 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-01-26 N1 - Date created - 2014-12-03 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.emc.2014.09.008 ER - TY - JOUR T1 - On the validation of seismic imaging methods; finite frequency or ray theory? AN - 1696875940; 2015-069400 AB - We investigate the merits of the more recently developed finite-frequency approach to tomography against the more traditional and approximate ray theoretical approach for state of the art seismic models developed for western North America. To this end, we employ the spectral element method to assess the agreement between observations on real data and measurements made on synthetic seismograms predicted by the models under consideration. We check for phase delay agreement as well as waveform cross-correlation values. Based on statistical analyses on S wave phase delay measurements, finite frequency shows an improvement over ray theory. Random sampling using cross-correlation values identifies regions where synthetic seismograms computed with ray theory and finite-frequency models differ the most. Our study suggests that finite-frequency approaches to seismic imaging exhibit measurable improvement for pronounced low-velocity anomalies such as mantle plumes. Abstract Copyright (2015), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Maceira, Monica AU - Larmat, Carene AU - Porritt, Robert W AU - Higdon, David M AU - Rowe, Charlotte A AU - Allen, Richard M Y1 - 2015/01/28/ PY - 2015 DA - 2015 Jan 28 SP - 323 EP - 330 PB - American Geophysical Union, Washington, DC VL - 42 IS - 2 SN - 0094-8276, 0094-8276 KW - United States KW - tomography KW - seismograms KW - seismic profiles KW - geophysical surveys KW - lithosphere KW - geophysical methods KW - mantle KW - seismic methods KW - continental lithosphere KW - Canada KW - Western U.S. KW - theoretical models KW - surveys KW - Western Canada KW - geophysical profiles KW - mantle plumes KW - 18:Solid-earth geophysics KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875940?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=On+the+validation+of+seismic+imaging+methods%3B+finite+frequency+or+ray+theory%3F&rft.au=Maceira%2C+Monica%3BLarmat%2C+Carene%3BPorritt%2C+Robert+W%3BHigdon%2C+David+M%3BRowe%2C+Charlotte+A%3BAllen%2C+Richard+M&rft.aulast=Maceira&rft.aufirst=Monica&rft.date=2015-01-28&rft.volume=42&rft.issue=2&rft.spage=323&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL062571 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 34 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-07-17 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - Canada; continental lithosphere; geophysical methods; geophysical profiles; geophysical surveys; lithosphere; mantle; mantle plumes; seismic methods; seismic profiles; seismograms; surveys; theoretical models; tomography; United States; Western Canada; Western U.S. DO - http://dx.doi.org/10.1002/2014GL062571 ER - TY - JOUR T1 - Design and synthesis of heterostructured quantum dots with dual emission in the visible and infrared. AN - 1652417411; 25427007 AB - The unique optical properties exhibited by visible emitting core/shell quantum dots with especially thick shells are the focus of widespread study, but have yet to be realized in infrared (IR)-active nanostructures. We apply an effective-mass model to identify PbSe/CdSe core/shell quantum dots as a promising system for achieving this goal. We then synthesize colloidal PbSe/CdSe quantum dots with shell thicknesses of up to 4 nm that exhibit unusually slow hole intraband relaxation from shell to core states, as evidenced by the emergence of dual emission, i.e., IR photoluminescence from the PbSe core observed simultaneously with visible emission from the CdSe shell. In addition to the large shell thickness, the development of slowed intraband relaxation is facilitated by the existence of a sharp core-shell interface without discernible alloying. Growth of thick shells without interfacial alloying or incidental formation of homogeneous CdSe nanocrystals was accomplished using insights attained via a systematic study of the dynamics of the cation-exchange synthesis of both PbSe/CdSe and the related system PbS/CdS. Finally, we show that the efficiency of the visible photoluminescence can be greatly enhanced by inorganic passivation. JF - ACS nano AU - Lin, Qianglu AU - Makarov, Nikolay S AU - Koh, Weon-kyu AU - Velizhanin, Kirill A AU - Cirloganu, Claudiu M AU - Luo, Hongmei AU - Klimov, Victor I AU - Pietryga, Jeffrey M AD - Center for Advanced Solar Photophysics, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States. Y1 - 2015/01/27/ PY - 2015 DA - 2015 Jan 27 SP - 539 EP - 547 VL - 9 IS - 1 KW - effective-mass model KW - quantum dots KW - vacancy formation KW - dual emission KW - core/shell nanocrystal KW - cation exchange UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1652417411?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Design+and+synthesis+of+heterostructured+quantum+dots+with+dual+emission+in+the+visible+and+infrared.&rft.au=Lin%2C+Qianglu%3BMakarov%2C+Nikolay+S%3BKoh%2C+Weon-kyu%3BVelizhanin%2C+Kirill+A%3BCirloganu%2C+Claudiu+M%3BLuo%2C+Hongmei%3BKlimov%2C+Victor+I%3BPietryga%2C+Jeffrey+M&rft.aulast=Lin&rft.aufirst=Qianglu&rft.date=2015-01-27&rft.volume=9&rft.issue=1&rft.spage=539&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Fnn505793y LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-04-23 N1 - Date created - 2015-01-27 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/nn505793y ER - TY - JOUR T1 - Development of a ground motion prediction method for carbon dioxide injection induced earthquakes AN - 1861088815; 763019-69 JF - Abstract Volume (Geological Association of Canada) AU - Stone, Ian AU - Lee, Richard C AU - Bradley, Christopher R AU - Larmat, Carene S AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - Abstract S22A EP - 07 PB - Geological Association of Canada, Waterloo, ON VL - 38 SN - 1716-6098, 1716-6098 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861088815?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstract+Volume+%28Geological+Association+of+Canada%29&rft.atitle=Development+of+a+ground+motion+prediction+method+for+carbon+dioxide+injection+induced+earthquakes&rft.au=Stone%2C+Ian%3BLee%2C+Richard+C%3BBradley%2C+Christopher+R%3BLarmat%2C+Carene+S%3BAnonymous&rft.aulast=Stone&rft.aufirst=Ian&rft.date=2015-01-01&rft.volume=38&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstract+Volume+%28Geological+Association+of+Canada%29&rft.issn=17166098&rft_id=info:doi/ L2 - http://www.gac.ca/activities/ LA - English DB - GeoRef N1 - Conference title - Joint assembly of the American Geophysical Union, Geological Association of Canada, Mineralogical Association of Canada, and Canadian Geophysical Union N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - ON N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Hydrothermal transport deposition, and fractionation of REE; experimental data nd thermodynamic calculations AN - 1861082992; 763015-65 JF - Abstract Volume (Geological Association of Canada) AU - Migdissov, Artaches A AU - Williams-Jones, Anthony E AU - Timofeev, Alexander AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - Abstract no34346 File43A EP - 03 PB - Geological Association of Canada, Waterloo, ON VL - 38 SN - 1716-6098, 1716-6098 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861082992?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstract+Volume+%28Geological+Association+of+Canada%29&rft.atitle=Hydrothermal+transport+deposition%2C+and+fractionation+of+REE%3B+experimental+data+nd+thermodynamic+calculations&rft.au=Migdissov%2C+Artaches+A%3BWilliams-Jones%2C+Anthony+E%3BTimofeev%2C+Alexander%3BAnonymous&rft.aulast=Migdissov&rft.aufirst=Artaches&rft.date=2015-01-01&rft.volume=38&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstract+Volume+%28Geological+Association+of+Canada%29&rft.issn=17166098&rft_id=info:doi/ L2 - http://www.gac.ca/activities/ LA - English DB - GeoRef N1 - Conference title - Joint assembly fo the American Geophysical Union, Geological Association of Canada, Mineralogical Associations of Canada, and Canadian Geophysical Union N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - ON N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - thermodynamic modeliing of metal transport in H (sub 2) O-cO (sub 2) vapours; CO (sub 2) -fluxing crashes metal mobility AN - 1861082912; 763023-18 JF - Abstract Volume (Geological Association of Canada) AU - van Hinsberg, Vincent AU - Berlo, Kim AU - Migdissov, Artaches A AU - Williams-Jones, Anthony E AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - Abstract no36542 FileP12B EP - 08 PB - Geological Association of Canada, Waterloo, ON VL - 38 SN - 1716-6098, 1716-6098 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861082912?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstract+Volume+%28Geological+Association+of+Canada%29&rft.atitle=thermodynamic+modeliing+of+metal+transport+in+H+%28sub+2%29+O-cO+%28sub+2%29+vapours%3B+CO+%28sub+2%29+-fluxing+crashes+metal+mobility&rft.au=van+Hinsberg%2C+Vincent%3BBerlo%2C+Kim%3BMigdissov%2C+Artaches+A%3BWilliams-Jones%2C+Anthony+E%3BAnonymous&rft.aulast=van+Hinsberg&rft.aufirst=Vincent&rft.date=2015-01-01&rft.volume=38&rft.issue=&rft.spage=Abstract+no36542+FileP12B&rft.isbn=&rft.btitle=&rft.title=Abstract+Volume+%28Geological+Association+of+Canada%29&rft.issn=17166098&rft_id=info:doi/ L2 - http://www.gac.ca/activities/ LA - English DB - GeoRef N1 - Conference title - Joint assembly of the American Geophysical Union, Geological Associaiton of Canada, Mineralogical Association of Canada, and Canadian Geophysical Union N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - ON N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - The solubility and speciation of tantalum in fluoride-bearing aqueous solutions AN - 1861082283; 763015-67 JF - Abstract Volume (Geological Association of Canada) AU - Timofeev, Alexander AU - Migdissov, Artaches A AU - Williams-Jones, Anthony E AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - Abstract no35392 File43A EP - 05 PB - Geological Association of Canada, Waterloo, ON VL - 38 SN - 1716-6098, 1716-6098 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861082283?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstract+Volume+%28Geological+Association+of+Canada%29&rft.atitle=The+solubility+and+speciation+of+tantalum+in+fluoride-bearing+aqueous+solutions&rft.au=Timofeev%2C+Alexander%3BMigdissov%2C+Artaches+A%3BWilliams-Jones%2C+Anthony+E%3BAnonymous&rft.aulast=Timofeev&rft.aufirst=Alexander&rft.date=2015-01-01&rft.volume=38&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstract+Volume+%28Geological+Association+of+Canada%29&rft.issn=17166098&rft_id=info:doi/ L2 - http://www.gac.ca/activities/ LA - English DB - GeoRef N1 - Conference title - Joint assembly fo the American Geophysical Union, Geological Association of Canada, Mineralogical Associations of Canada, and Canadian Geophysical Union N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - ON N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Distribution of mineralizaed veins from Yellowknife Bay to Mount Sharp, Gale Crater, Mars; insight from textural and compositional variation AN - 1859788598; 2017-005173 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Kronyak, R E AU - Kah, L C AU - Nachon, M AU - Mangold, N AU - Weins, R C AU - Williams, R AU - Schieber, J AU - Grotzinger, J P AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1903 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - Yellowknife Bay KW - overpressure KW - ChemCam instrument KW - calcium sulfate KW - sulfates KW - textures KW - Mars KW - veins KW - burial diagenesis KW - Bradbury Rise KW - Pahrump Hills KW - Gale Crater KW - terrestrial planets KW - spatial distribution KW - planets KW - gypsum KW - diagenesis KW - Curiosity Rover KW - Mars Science Laboratory KW - mobilization KW - Mount Sharp KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859788598?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Distribution+of+mineralizaed+veins+from+Yellowknife+Bay+to+Mount+Sharp%2C+Gale+Crater%2C+Mars%3B+insight+from+textural+and+compositional+variation&rft.au=Kronyak%2C+R+E%3BKah%2C+L+C%3BNachon%2C+M%3BMangold%2C+N%3BWeins%2C+R+C%3BWilliams%2C+R%3BSchieber%2C+J%3BGrotzinger%2C+J+P%3BAnonymous&rft.aulast=Kronyak&rft.aufirst=R&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1903.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - Number of references - 5 N1 - PubXState - TX N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Accessed on July 28, 2016 N1 - Last updated - 2017-01-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Bradbury Rise; burial diagenesis; calcium sulfate; ChemCam instrument; Curiosity Rover; diagenesis; Gale Crater; gypsum; Mars; Mars Science Laboratory; mobilization; Mount Sharp; overpressure; Pahrump Hills; planets; spatial distribution; sulfates; terrestrial planets; textures; veins; Yellowknife Bay ER - TY - JOUR T1 - Hematite indicator of high water to rock ratio alteration in Gale Crater AN - 1855318249; 2017-000685 JF - Annual Meeting of the Meteoritical Society AU - Bridges, J C AU - Schwenzer, S P AU - Leveille, R AU - Wiens, R C AU - McAdam, A AU - Conrad, P G AU - Kelley, S P AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 5293 PB - Meteoritical Society, [varies] VL - 78 SN - 0735-049X, 0735-049X KW - alteration KW - iron oxides KW - Mars KW - indicators KW - metasomatism KW - weathering KW - Sheepbed Mudstone KW - Gale Crater KW - terrestrial planets KW - models KW - planets KW - paleoenvironment KW - water-rock interaction KW - Hematite Ridge KW - hematite KW - diagenesis KW - Curiosity Rover KW - Mars Science Laboratory KW - oxides KW - water content KW - hydrothermal alteration KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855318249?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Hematite+indicator+of+high+water+to+rock+ratio+alteration+in+Gale+Crater&rft.au=Bridges%2C+J+C%3BSchwenzer%2C+S+P%3BLeveille%2C+R%3BWiens%2C+R+C%3BMcAdam%2C+A%3BConrad%2C+P+G%3BKelley%2C+S+P%3BAnonymous&rft.aulast=Bridges&rft.aufirst=J&rft.date=2015-01-01&rft.volume=78&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2015/pdf/5293.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 78th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - Number of references - 5 N1 - SuppNotes - Accessed on Aug. 12, 2016 N1 - Last updated - 2017-01-05 N1 - SubjectsTermNotLitGenreText - alteration; Curiosity Rover; diagenesis; Gale Crater; hematite; Hematite Ridge; hydrothermal alteration; indicators; iron oxides; Mars; Mars Science Laboratory; metasomatism; models; oxides; paleoenvironment; planets; Sheepbed Mudstone; terrestrial planets; water content; water-rock interaction; weathering ER - TY - JOUR T1 - Heat sources within the Greenland ice sheet; dissipation, temperate paleo-firn and cryo-hydrologic warming AN - 1849302606; 2016-104918 AB - Ice temperature profiles from the Greenland Ice Sheet contain information on the deformation history, past climates and recent warming. We present full-depth temperature profiles from two drill sites on a flow line passing through Swiss Camp, West Greenland. Numerical modeling reveals that ice temperatures are considerably higher than would be expected from heat diffusion and dissipation alone. The possible causes for this extra heat are evaluated using a Lagrangian heat flow model. The model results reveal that the observations can be explained with a combination of different processes: enhanced dissipation (strain heating) in ice-age ice, temperate paleo-firn, and cryo-hydrologic warming in deep crevasses. JF - The Cryosphere (Online) AU - Luethi, M P AU - Ryser, C AU - Andrews, L C AU - Catania, G A AU - Funk, M AU - Hawley, R L AU - Hoffman, M J AU - Neumann, T A Y1 - 2015 PY - 2015 DA - 2015 SP - 245 EP - 253 PB - Copernicus on behalf of the European Geosciences Union, Katlenburg-Lindau VL - 9 IS - 1 KW - ablation KW - strain KW - cryo-hydrologic warming KW - Greenland ice sheet KW - West Greenland KW - mechanism KW - freezing KW - thermal regime KW - Holocene KW - dissipation KW - climate change KW - temperature KW - Cenozoic KW - Greenland KW - thermal diffusivity KW - ice KW - heat flow KW - thickness KW - climate KW - hydrology KW - cryosphere KW - crevasses KW - Quaternary KW - numerical models KW - Arctic region KW - firn KW - thermal properties KW - equations KW - glacial features KW - deformation KW - ice sheets KW - measurement KW - models KW - boreholes KW - paleo-firn KW - heat sources KW - heating KW - glacial geology KW - upper Holocene KW - meltwater KW - 24:Quaternary geology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849302606?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Cryosphere+%28Online%29&rft.atitle=Heat+sources+within+the+Greenland+ice+sheet%3B+dissipation%2C+temperate+paleo-firn+and+cryo-hydrologic+warming&rft.au=Luethi%2C+M+P%3BRyser%2C+C%3BAndrews%2C+L+C%3BCatania%2C+G+A%3BFunk%2C+M%3BHawley%2C+R+L%3BHoffman%2C+M+J%3BNeumann%2C+T+A&rft.aulast=Luethi&rft.aufirst=M&rft.date=2015-01-01&rft.volume=9&rft.issue=1&rft.spage=245&rft.isbn=&rft.btitle=&rft.title=The+Cryosphere+%28Online%29&rft.issn=1994-0424&rft_id=info:doi/ L2 - http://www.the-cryosphere.net/9/245/2015/tc-9-245-2015.pdf http://www.the-cryosphere.net/volumes_and_issues.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 37 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - ablation; Arctic region; boreholes; Cenozoic; climate; climate change; crevasses; cryo-hydrologic warming; cryosphere; deformation; dissipation; equations; firn; freezing; glacial features; glacial geology; Greenland; Greenland ice sheet; heat flow; heat sources; heating; Holocene; hydrology; ice; ice sheets; measurement; mechanism; meltwater; models; numerical models; paleo-firn; Quaternary; strain; temperature; thermal diffusivity; thermal properties; thermal regime; thickness; upper Holocene; West Greenland ER - TY - JOUR T1 - Remote geochemical and mineralogical analysis with SuperCam for the Mars 2020 rover AN - 1840621477; 2016-095414 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Clegg, S M AU - Wiens, R C AU - Maurice, Sylvestre AU - Gasnault, O AU - Sharma, S K AU - Misra, A K AU - Newell, R AU - Forni, O AU - Lasue, J AU - Anderson, R B AU - Nowak-Lovato, K L AU - Fouchet, T AU - Angel, S Michael AU - Rull, F AU - Johnson, J R AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2781 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - calcium sulfate KW - experimental studies KW - chemical analysis KW - laser-induced breakdown spectroscopy KW - sulfates KW - SuperCam instrument suite KW - Mars KW - rovers KW - simulation KW - emission spectroscopy KW - emission spectra KW - terrestrial planets KW - Raman spectroscopy KW - planets KW - Raman spectra KW - mineral composition KW - fluorescence KW - Mars 2020 Mission KW - LIBS spectra KW - spectra KW - spectroscopy KW - instruments KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621477?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Remote+geochemical+and+mineralogical+analysis+with+SuperCam+for+the+Mars+2020+rover&rft.au=Clegg%2C+S+M%3BWiens%2C+R+C%3BMaurice%2C+Sylvestre%3BGasnault%2C+O%3BSharma%2C+S+K%3BMisra%2C+A+K%3BNewell%2C+R%3BForni%2C+O%3BLasue%2C+J%3BAnderson%2C+R+B%3BNowak-Lovato%2C+K+L%3BFouchet%2C+T%3BAngel%2C+S+Michael%3BRull%2C+F%3BJohnson%2C+J+R%3BAnonymous&rft.aulast=Clegg&rft.aufirst=S&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2781.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 27, 2016 N1 - Last updated - 2016-11-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calcium sulfate; chemical analysis; emission spectra; emission spectroscopy; experimental studies; fluorescence; instruments; laser-induced breakdown spectroscopy; LIBS spectra; Mars; Mars 2020 Mission; mineral composition; planets; Raman spectra; Raman spectroscopy; remote sensing; rovers; simulation; spectra; spectroscopy; sulfates; SuperCam instrument suite; terrestrial planets ER - TY - JOUR T1 - SuperCam Remote Micro-Imager on Mars 2020 AN - 1840619902; 2016-095416 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gasnault, O AU - Maurice, Sylvestre AU - Wiens, R C AU - Le Mouelic, S AU - Fischer, W W AU - Cais, P AU - McCabe, K AU - Reess, J M AU - Virmontois, C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2990 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - scale factor KW - imagery KW - textures KW - SuperCam instrument suite KW - Remote Micro-Imager KW - Mars KW - terrestrial planets KW - planets KW - Mars 2020 Mission KW - instruments KW - color imagery KW - cameras KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840619902?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=SuperCam+Remote+Micro-Imager+on+Mars+2020&rft.au=Gasnault%2C+O%3BMaurice%2C+Sylvestre%3BWiens%2C+R+C%3BLe+Mouelic%2C+S%3BFischer%2C+W+W%3BCais%2C+P%3BMcCabe%2C+K%3BReess%2C+J+M%3BVirmontois%2C+C%3BAnonymous&rft.aulast=Gasnault&rft.aufirst=O&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2990.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 10 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 27, 2016 N1 - Last updated - 2016-11-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - cameras; color imagery; imagery; instruments; Mars; Mars 2020 Mission; planets; Remote Micro-Imager; scale factor; SuperCam instrument suite; terrestrial planets; textures ER - TY - JOUR T1 - Science objectives of the SuperCam instrument for the Mars 2020 rover AN - 1840618979; 2016-095415 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Maurice, Sylvestre AU - Wiens, R C AU - Anderson, R B AU - Beyssac, O AU - Bonal, L AU - Clegg, S M AU - DeFlores, L AU - Dromart, G AU - Fischer, W W AU - Forni, O AU - Gasnault, O AU - Grotzinger, J AU - Johnson, J R AU - Martinez-Frias, J AU - Mangold, N AU - McLennan, S AU - Montmessin, F AU - Rull, F AU - Sharma, S K AU - Fouchet, T AU - Poulet, F AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2818 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - imagery KW - laser-induced breakdown spectroscopy KW - SuperCam instrument suite KW - astrobiology KW - Mars KW - near infrared spectroscopy KW - fluorescence KW - sedimentary structures KW - color imagery KW - textures KW - atmosphere KW - rovers KW - biomarkers KW - weathering KW - emission spectroscopy KW - terrestrial planets KW - morphology KW - planets KW - volatiles KW - organic compounds KW - objectives KW - optical spectroscopy KW - spectroscopy KW - regolith KW - instruments KW - remote sensing KW - Mars 2020 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840618979?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Science+objectives+of+the+SuperCam+instrument+for+the+Mars+2020+rover&rft.au=Maurice%2C+Sylvestre%3BWiens%2C+R+C%3BAnderson%2C+R+B%3BBeyssac%2C+O%3BBonal%2C+L%3BClegg%2C+S+M%3BDeFlores%2C+L%3BDromart%2C+G%3BFischer%2C+W+W%3BForni%2C+O%3BGasnault%2C+O%3BGrotzinger%2C+J%3BJohnson%2C+J+R%3BMartinez-Frias%2C+J%3BMangold%2C+N%3BMcLennan%2C+S%3BMontmessin%2C+F%3BRull%2C+F%3BSharma%2C+S+K%3BFouchet%2C+T%3BPoulet%2C+F%3BAnonymous&rft.aulast=Maurice&rft.aufirst=Sylvestre&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2818.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 27, 2016 N1 - Last updated - 2016-11-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - astrobiology; atmosphere; biomarkers; color imagery; emission spectroscopy; fluorescence; imagery; instruments; laser-induced breakdown spectroscopy; Mars; Mars 2020; morphology; near infrared spectroscopy; objectives; optical spectroscopy; organic compounds; planets; regolith; remote sensing; rovers; sedimentary structures; spectroscopy; SuperCam instrument suite; terrestrial planets; textures; volatiles; weathering ER - TY - JOUR T1 - Remote Raman detection of frost on minerals AN - 1840617582; 2016-095422 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Misra, A K AU - Sharma, S K AU - Acosta-Maeda, T E AU - Berlanga, G AU - Clegg, S M AU - Wiens, R C AU - Abedin, M N AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1553 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - water KW - methods KW - experimental studies KW - chemical analysis KW - sulfates KW - temperature KW - carbon dioxide KW - calcite KW - Raman spectroscopy KW - Raman spectra KW - detection KW - ice KW - gypsum KW - low temperature KW - spectra KW - spectroscopy KW - carbonates KW - minerals KW - remote sensing KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840617582?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Remote+Raman+detection+of+frost+on+minerals&rft.au=Misra%2C+A+K%3BSharma%2C+S+K%3BAcosta-Maeda%2C+T+E%3BBerlanga%2C+G%3BClegg%2C+S+M%3BWiens%2C+R+C%3BAbedin%2C+M+N%3BAnonymous&rft.aulast=Misra&rft.aufirst=A&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1553.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 31, 2016 N1 - Last updated - 2016-11-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calcite; carbon dioxide; carbonates; chemical analysis; detection; experimental studies; gypsum; ice; low temperature; methods; minerals; Raman spectra; Raman spectroscopy; remote sensing; spectra; spectroscopy; sulfates; temperature; water ER - TY - JOUR T1 - The infrared investigation on the SuperCam instrument for the Mars 2020 rover AN - 1840617289; 2016-095413 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Fouchet, Thierry AU - Montmessin, F AU - Forni, O AU - Maurice, Sylvestre AU - Wiens, R C AU - Johnson, J R AU - Clegg, S M AU - Beck, P AU - Poulet, F AU - Gasnault, O AU - Meslin, P Y AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1736 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - silicates KW - hydrates KW - laser-induced breakdown spectroscopy KW - SuperCam instrument suite KW - olivine group KW - Mars KW - calibration KW - infrared spectroscopy KW - pyroxene group KW - olivine KW - Mars 2020 Mission KW - orthosilicates KW - chain silicates KW - sulfates KW - rovers KW - emission spectroscopy KW - terrestrial planets KW - nesosilicates KW - planets KW - organic compounds KW - signal-to-noise ratio KW - sheet silicates KW - spectroscopy KW - carbonates KW - accuracy KW - instruments KW - design KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840617289?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=The+infrared+investigation+on+the+SuperCam+instrument+for+the+Mars+2020+rover&rft.au=Fouchet%2C+Thierry%3BMontmessin%2C+F%3BForni%2C+O%3BMaurice%2C+Sylvestre%3BWiens%2C+R+C%3BJohnson%2C+J+R%3BClegg%2C+S+M%3BBeck%2C+P%3BPoulet%2C+F%3BGasnault%2C+O%3BMeslin%2C+P+Y%3BAnonymous&rft.aulast=Fouchet&rft.aufirst=Thierry&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1736.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 15 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 26, 2016 N1 - Last updated - 2016-11-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - accuracy; calibration; carbonates; chain silicates; design; emission spectroscopy; hydrates; infrared spectroscopy; instruments; laser-induced breakdown spectroscopy; Mars; Mars 2020 Mission; nesosilicates; olivine; olivine group; organic compounds; orthosilicates; planets; pyroxene group; rovers; sheet silicates; signal-to-noise ratio; silicates; spectroscopy; sulfates; SuperCam instrument suite; terrestrial planets ER - TY - JOUR T1 - A new suite of hydrodynamical simulations of the origin of the obliquity of Uranus AN - 1840616077; 2016-093415 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Teodoro, Luis F A AU - Korycansky, Donald G AU - Warren, Michael S AU - Fryer, Christopher L AU - Rockefeller, Gabriel AU - Zahnle, Kevin AU - Eke, Vincent R AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2916 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - smoothed particle hydrodynamics KW - obliquity of the ecliptic KW - interpolation KW - planetesimals KW - impacts KW - simulation KW - giant planets KW - models KW - planets KW - Uranus KW - hydrodynamics KW - outer planets KW - equations of state KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840616077?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=A+new+suite+of+hydrodynamical+simulations+of+the+origin+of+the+obliquity+of+Uranus&rft.au=Teodoro%2C+Luis+F+A%3BKorycansky%2C+Donald+G%3BWarren%2C+Michael+S%3BFryer%2C+Christopher+L%3BRockefeller%2C+Gabriel%3BZahnle%2C+Kevin%3BEke%2C+Vincent+R%3BAnonymous&rft.aulast=Teodoro&rft.aufirst=Luis+F&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2015/pdf/2916.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 7 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Aug. 29, 2016 N1 - Last updated - 2016-11-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - equations of state; giant planets; hydrodynamics; impacts; interpolation; models; obliquity of the ecliptic; outer planets; planetesimals; planets; simulation; smoothed particle hydrodynamics; Uranus ER - TY - JOUR T1 - Rock abrasion and landscape modification by windblown sand as documented by the MSL Curiosity Rover AN - 1832723413; 2016-091359 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Bridges, Nathan T AU - Blaney, D L AU - Day, M D AU - Herkenhoff, K E AU - Lanza, N L AU - Le Mouelic, S AU - Martin-Torres, F J AU - Maurice, S AU - Newman, C E AU - Newsom, H E AU - Wiens, Roger C AU - Zorzano, M P AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2324 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - scour KW - eolian features KW - orientation KW - ventifacts KW - erosion KW - textures KW - wind erosion KW - Mars KW - Sheepbed Mudstone KW - Gale Crater KW - terrestrial planets KW - planets KW - yardangs KW - abrasion KW - Curiosity Rover KW - Mars Science Laboratory KW - outcrops KW - HiRISE KW - geomorphology KW - dune fields KW - winds KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832723413?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Rock+abrasion+and+landscape+modification+by+windblown+sand+as+documented+by+the+MSL+Curiosity+Rover&rft.au=Bridges%2C+Nathan+T%3BBlaney%2C+D+L%3BDay%2C+M+D%3BHerkenhoff%2C+K+E%3BLanza%2C+N+L%3BLe+Mouelic%2C+S%3BMartin-Torres%2C+F+J%3BMaurice%2C+S%3BNewman%2C+C+E%3BNewsom%2C+H+E%3BWiens%2C+Roger+C%3BZorzano%2C+M+P%3BAnonymous&rft.aulast=Bridges&rft.aufirst=Nathan&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2324.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 16 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 7, 2016 N1 - Last updated - 2016-10-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - abrasion; Curiosity Rover; dune fields; eolian features; erosion; Gale Crater; geomorphology; HiRISE; Mars; Mars Science Laboratory; orientation; outcrops; planets; scour; Sheepbed Mudstone; terrestrial planets; textures; ventifacts; wind erosion; winds; yardangs ER - TY - JOUR T1 - Elemental volatility during vacuum melting of Martian meteorite NWA 8114 AN - 1832681302; 768623-49 JF - Annual Meeting of the Meteoritical Society AU - Humayun, M AU - Crowther, S A AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 5313 PB - The Society, [United States] VL - 78 SN - 0735-049X, 0735-049X KW - Northwest Africa Meteorites KW - zinc KW - stony meteorites KW - refractory materials KW - Martian meteorites KW - mass spectra KW - NWA 7533 KW - melts KW - volatilization KW - vacuum melting KW - meteorites KW - impact melts KW - melting KW - major elements KW - volatile elements KW - spectra KW - trace elements KW - depletion KW - experimental studies KW - NWA 8114 KW - alkali metals KW - sodium KW - achondrites KW - solar nebula KW - ICP mass spectra KW - metals KW - heating KW - uranium KW - actinides KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832681302?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Elemental+volatility+during+vacuum+melting+of+Martian+meteorite+NWA+8114&rft.au=Humayun%2C+M%3BCrowther%2C+S+A%3BAnonymous&rft.aulast=Humayun&rft.aufirst=M&rft.date=2015-01-01&rft.volume=78&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2015/pdf/5313.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 78th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 7 N1 - SuppNotes - Accessed on Sept. 8, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - achondrites; actinides; alkali metals; depletion; experimental studies; heating; ICP mass spectra; impact melts; major elements; Martian meteorites; mass spectra; melting; melts; metals; meteorites; Northwest Africa Meteorites; NWA 7533; NWA 8114; refractory materials; sodium; solar nebula; spectra; stony meteorites; trace elements; uranium; vacuum melting; volatile elements; volatilization; zinc ER - TY - JOUR T1 - Pure mineral phases sampled by the ChemCam instrument in Gale Crater, Mars, as measured using cation ratios for Sols 13-801 AN - 1832671521; 726462-3 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Dyar, M D AU - Dobosh, P AU - Bridges, J AU - Wiens, R AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1514 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - silicates KW - calcium KW - magnesium KW - olivine group KW - Mars KW - silicon KW - iron KW - Gale Crater KW - pyroxene group KW - olivine KW - orthosilicates KW - framework silicates KW - stoichiometry KW - chemical ratios KW - chain silicates KW - ChemCam instrument KW - alkaline earth metals KW - alkali metals KW - sodium KW - terrestrial planets KW - nesosilicates KW - planets KW - metals KW - potassium KW - cations KW - feldspar group KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832671521?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Pure+mineral+phases+sampled+by+the+ChemCam+instrument+in+Gale+Crater%2C+Mars%2C+as+measured+using+cation+ratios+for+Sols+13-801&rft.au=Dyar%2C+M+D%3BDobosh%2C+P%3BBridges%2C+J%3BWiens%2C+R%3BAnonymous&rft.aulast=Dyar&rft.aufirst=M&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1514.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 5 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; calcium; cations; chain silicates; ChemCam instrument; chemical ratios; feldspar group; framework silicates; Gale Crater; iron; magnesium; Mars; metals; nesosilicates; olivine; olivine group; orthosilicates; planets; potassium; pyroxene group; silicates; silicon; sodium; stoichiometry; terrestrial planets ER - TY - JOUR T1 - In-situ depth profile of solar wind helium from Genesis diamond-like carbon AN - 1832645790; 724348-38 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Yurimoto, H AU - Bajo, K AU - Olinger, C T AU - Jurewicz, A J G AU - Sakaguchi, I AU - Suzuki, T AU - Itose, S AU - Ishihara, M AU - uchino, K AU - Wieler, R AU - Burnett, D S AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract 1766.pdf PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832645790?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=In-situ+depth+profile+of+solar+wind+helium+from+Genesis+diamond-like+carbon&rft.au=Yurimoto%2C+H%3BBajo%2C+K%3BOlinger%2C+C+T%3BJurewicz%2C+A+J+G%3BSakaguchi%2C+I%3BSuzuki%2C+T%3BItose%2C+S%3BIshihara%2C+M%3Buchino%2C+K%3BWieler%2C+R%3BBurnett%2C+D+S%3BAnonymous&rft.aulast=Yurimoto&rft.aufirst=H&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 10 N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Impact of acid-cleaning on the solar wind layer of Genesis flight wafers; partial dissolution and recovery of the lithium-6 implant AN - 1832645109; 724348-41 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Waeselmann, N AU - Goreva, Y S AU - Burnett, D s AU - Jurewicz, A AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract 1266.pdf PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832645109?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Impact+of+acid-cleaning+on+the+solar+wind+layer+of+Genesis+flight+wafers%3B+partial+dissolution+and+recovery+of+the+lithium-6+implant&rft.au=Waeselmann%2C+N%3BGoreva%2C+Y+S%3BBurnett%2C+D+s%3BJurewicz%2C+A%3BAnonymous&rft.aulast=Waeselmann&rft.aufirst=N&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 7 N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - An overview of the Los Alamos program on asteroid mitigation AN - 1832636129; 726463-49 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Weaver, R P AU - Plesko, Catherine S AU - Gisler, Galen R AU - Ferguson, Jim M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1148 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - United States KW - programs KW - shock waves KW - asteroids KW - explosions KW - New Mexico KW - Los Alamos County New Mexico KW - Los Alamos National Laboratory KW - impacts KW - simulation KW - models KW - mitigation KW - natural hazards KW - hydrodynamics KW - nuclear explosions KW - kinetics KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832636129?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=An+overview+of+the+Los+Alamos+program+on+asteroid+mitigation&rft.au=Weaver%2C+R+P%3BPlesko%2C+Catherine+S%3BGisler%2C+Galen+R%3BFerguson%2C+Jim+M%3BAnonymous&rft.aulast=Weaver&rft.aufirst=R&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1148.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - asteroids; explosions; hydrodynamics; impacts; kinetics; Los Alamos County New Mexico; Los Alamos National Laboratory; mitigation; models; natural hazards; New Mexico; nuclear explosions; programs; shock waves; simulation; United States ER - TY - JOUR T1 - Calibration transfer of LIBS spectra to correct for Mars-Earth lab differences AN - 1832619622; 726462-1 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Boucher, T AU - Dyar, M D AU - Carey, C AU - Giguere, S AU - Mahadevan, S AU - Clegg, S AU - Anderson, R AU - Wiens, R AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2773 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - ChemCam instrument KW - chemical analysis KW - Earth KW - laser-induced breakdown spectroscopy KW - partial least squares analysis KW - statistical analysis KW - Mars KW - calibration KW - emission spectroscopy KW - emission spectra KW - terrestrial planets KW - calibration transfer KW - planets KW - laboratory studies KW - transfer functions KW - errors KW - Curiosity Rover KW - Mars Science Laboratory KW - LIBS spectra KW - spectra KW - corrections KW - spectroscopy KW - instruments KW - 04:Extraterrestrial geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832619622?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Calibration+transfer+of+LIBS+spectra+to+correct+for+Mars-Earth+lab+differences&rft.au=Boucher%2C+T%3BDyar%2C+M+D%3BCarey%2C+C%3BGiguere%2C+S%3BMahadevan%2C+S%3BClegg%2C+S%3BAnderson%2C+R%3BWiens%2C+R%3BAnonymous&rft.aulast=Boucher&rft.aufirst=T&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2773.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 5 N1 - PubXState - TX N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calibration; calibration transfer; ChemCam instrument; chemical analysis; corrections; Curiosity Rover; Earth; emission spectra; emission spectroscopy; errors; instruments; laboratory studies; laser-induced breakdown spectroscopy; LIBS spectra; Mars; Mars Science Laboratory; partial least squares analysis; planets; spectra; spectroscopy; statistical analysis; terrestrial planets; transfer functions ER - TY - JOUR T1 - Grain size analysis with simulation of digital images from Mars Science Laboratory testbed imagers AN - 1828845667; 2016-085638 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Ha, Beth M AU - Williams, A J AU - Newsom, H AU - Rapin, W AU - Gasnault, O AU - Wiens, R C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2201 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - United States KW - imagery KW - sandstone KW - digital imagery KW - Mars KW - New Mexico KW - Lower Permian KW - Gale Crater KW - sedimentary rocks KW - grain boundaries KW - Curiosity Rover KW - cameras KW - granulometry KW - ChemCam instrument KW - mudstone KW - Paleozoic KW - grain size KW - Abo Formation KW - Permian KW - conglomerate KW - measurement KW - terrestrial planets KW - planets KW - natural analogs KW - Mars Science Laboratory KW - clastic rocks KW - accuracy KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828845667?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Grain+size+analysis+with+simulation+of+digital+images+from+Mars+Science+Laboratory+testbed+imagers&rft.au=Ha%2C+Beth+M%3BWilliams%2C+A+J%3BNewsom%2C+H%3BRapin%2C+W%3BGasnault%2C+O%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Ha&rft.aufirst=Beth&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2201.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Feb. 3, 2016 N1 - Last updated - 2016-10-25 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Abo Formation; accuracy; cameras; ChemCam instrument; clastic rocks; conglomerate; Curiosity Rover; digital imagery; Gale Crater; grain boundaries; grain size; granulometry; imagery; Lower Permian; Mars; Mars Science Laboratory; measurement; mudstone; natural analogs; New Mexico; Paleozoic; Permian; planets; sandstone; sedimentary rocks; terrestrial planets; United States ER - TY - JOUR T1 - Fluids, evaporation and precipitates at Gale Crater, Mars AN - 1824216567; 2016-084321 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Schwenzer, Susanne P AU - Bridges, J C AU - Leveille, R AU - Wiens, Roger C AU - Mangold, N AU - McAdam, A C AU - Conrad, P AU - Kelley, S P AU - Westall, F AU - Martin-Torres, J AU - Zorzano, Maria-Paz AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1441 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - silicates KW - Somerset England KW - anhydrite KW - England KW - Mars KW - fluid phase KW - Europe KW - Great Britain KW - Gale Crater KW - carbon dioxide KW - Watchett Bay England KW - water-rock interaction KW - Triassic KW - silica KW - gypsum KW - Upper Triassic KW - Western Europe KW - sulfates KW - veins KW - United Kingdom KW - Mesozoic KW - clay minerals KW - terrestrial planets KW - models KW - aqueous alteration KW - planets KW - hydration KW - evaporation KW - precipitation KW - natural analogs KW - Mars Science Laboratory KW - sheet silicates KW - carbonates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824216567?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Fluids%2C+evaporation+and+precipitates+at+Gale+Crater%2C+Mars&rft.au=Schwenzer%2C+Susanne+P%3BBridges%2C+J+C%3BLeveille%2C+R%3BWiens%2C+Roger+C%3BMangold%2C+N%3BMcAdam%2C+A+C%3BConrad%2C+P%3BKelley%2C+S+P%3BWestall%2C+F%3BMartin-Torres%2C+J%3BZorzano%2C+Maria-Paz%3BAnonymous&rft.aulast=Schwenzer&rft.aufirst=Susanne&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1441.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 16 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on April 1, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - anhydrite; aqueous alteration; carbon dioxide; carbonates; clay minerals; England; Europe; evaporation; fluid phase; Gale Crater; Great Britain; gypsum; hydration; Mars; Mars Science Laboratory; Mesozoic; models; natural analogs; planets; precipitation; sheet silicates; silica; silicates; Somerset England; sulfates; terrestrial planets; Triassic; United Kingdom; Upper Triassic; veins; Watchett Bay England; water-rock interaction; Western Europe ER - TY - JOUR T1 - Statistical variability of ChemCam LIBS spectra from Gale Crater exploration by Curiosity (MSL); characterizing the sources of uncertainties AN - 1824216559; 2016-084273 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Lewin, Eric AU - Beck, Pierre AU - Lasue, Jeremie AU - Maurice, Sylvestre AU - Wiens, Roger C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 3012 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - ChemCam instrument KW - variance analysis KW - statistical analysis KW - standard deviation KW - Mars KW - variations KW - Gale Crater KW - emission spectra KW - terrestrial planets KW - planets KW - Curiosity Rover KW - Mars Science Laboratory KW - LIBS spectra KW - spectra KW - uncertainty KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824216559?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Statistical+variability+of+ChemCam+LIBS+spectra+from+Gale+Crater+exploration+by+Curiosity+%28MSL%29%3B+characterizing+the+sources+of+uncertainties&rft.au=Lewin%2C+Eric%3BBeck%2C+Pierre%3BLasue%2C+Jeremie%3BMaurice%2C+Sylvestre%3BWiens%2C+Roger+C%3BAnonymous&rft.aulast=Lewin&rft.aufirst=Eric&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/3012.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - TX N1 - SuppNotes - Accessed on March 21, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - ChemCam instrument; Curiosity Rover; emission spectra; Gale Crater; LIBS spectra; Mars; Mars Science Laboratory; planets; spectra; standard deviation; statistical analysis; terrestrial planets; uncertainty; variance analysis; variations ER - TY - JOUR T1 - Laser induced breakdown spectroscopy sampling in Martian polymict breccia Northwest Africa 7034 AN - 1824216480; 2016-084274 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gordon, S R AU - Newsom, H E AU - Clegg, S M AU - Dyar, M D AU - Agee, C B AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2232 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - Northwest Africa Meteorites KW - stony meteorites KW - Martian meteorites KW - standard deviation KW - Mars KW - simulation KW - emission spectra KW - meteorites KW - NWA 7034 KW - major elements KW - quantitative analysis KW - Curiosity Rover KW - LIBS spectra KW - spectra KW - chemical composition KW - ChemCam instrument KW - precision KW - breccia KW - matrix KW - grain size KW - statistical analysis KW - clasts KW - achondrites KW - terrestrial planets KW - planets KW - heterogeneous materials KW - natural analogs KW - Mars Science Laboratory KW - polymict breccia KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824216480?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Laser+induced+breakdown+spectroscopy+sampling+in+Martian+polymict+breccia+Northwest+Africa+7034&rft.au=Gordon%2C+S+R%3BNewsom%2C+H+E%3BClegg%2C+S+M%3BDyar%2C+M+D%3BAgee%2C+C+B%3BAnonymous&rft.aulast=Gordon&rft.aufirst=S&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2232.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 4 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on March 21, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - achondrites; breccia; ChemCam instrument; chemical composition; clasts; Curiosity Rover; emission spectra; grain size; heterogeneous materials; LIBS spectra; major elements; Mars; Mars Science Laboratory; Martian meteorites; matrix; meteorites; natural analogs; Northwest Africa Meteorites; NWA 7034; planets; polymict breccia; precision; quantitative analysis; simulation; spectra; standard deviation; statistical analysis; stony meteorites; terrestrial planets ER - TY - JOUR T1 - ChemCam soil analyses; unusually high hydrogen in the Hidden Valley soils at Gale Crater, Mars AN - 1824216451; 2016-084267 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Schroeder, S AU - Cousin, Agnes AU - Meslin, P Y AU - Gasnault, O AU - Maurice, Sylvestre AU - Lasue, Jeremie AU - Forni, O AU - Bridges, N AU - Clark, B AU - Wiens, Roger C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2022 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - hydrates KW - halides KW - calcium KW - halogens KW - Mars KW - Gale Crater KW - emission spectra KW - Hidden Valley KW - multivariate analysis KW - chlorides KW - LIBS spectra KW - spectra KW - chemical composition KW - soils KW - chlorine KW - ChemCam instrument KW - alkaline earth metals KW - statistical analysis KW - alkali metals KW - sodium KW - perchlorate KW - terrestrial planets KW - univariate analysis KW - planets KW - metals KW - hydrogen KW - potassium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824216451?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=ChemCam+soil+analyses%3B+unusually+high+hydrogen+in+the+Hidden+Valley+soils+at+Gale+Crater%2C+Mars&rft.au=Schroeder%2C+S%3BCousin%2C+Agnes%3BMeslin%2C+P+Y%3BGasnault%2C+O%3BMaurice%2C+Sylvestre%3BLasue%2C+Jeremie%3BForni%2C+O%3BBridges%2C+N%3BClark%2C+B%3BWiens%2C+Roger+C%3BAnonymous&rft.aulast=Schroeder&rft.aufirst=S&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2022.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 10 N1 - PubXState - TX N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Accessed on March 17, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; calcium; ChemCam instrument; chemical composition; chlorides; chlorine; emission spectra; Gale Crater; halides; halogens; Hidden Valley; hydrates; hydrogen; LIBS spectra; Mars; metals; multivariate analysis; perchlorate; planets; potassium; sodium; soils; spectra; statistical analysis; terrestrial planets; univariate analysis ER - TY - JOUR T1 - Diagenetic features analyzed by ChemCam/Curiosity at Pahrump Hills, Gale Crater, Mars AN - 1824216177; 2016-084262 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Nachon, Marion AU - Mangold, N AU - Cousin, Agnes AU - Forni, O AU - Anderson, R B AU - Blank, J G AU - Calef, F AU - Clegg, S M AU - Fabre, C AU - Fisk, M AU - Gasnault, O AU - Kah, L C AU - Kronyak, R AU - Lasue, Jeremie AU - Meslin, P Y AU - Le Mouelic, S AU - Maurice, Sylvestre AU - Oehler, D Z AU - Payre, V AU - Rapin, W AU - Sumner, D AU - Stack, K AU - Schroeder, S AU - Wiens, Roger C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1524 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - ChemCam instrument KW - alkaline earth metals KW - magnesium KW - secondary structures KW - sulfates KW - Mars KW - veins KW - Pahrump Hills KW - Gale Crater KW - emission spectra KW - terrestrial planets KW - planets KW - concretions KW - metals KW - diagenesis KW - Curiosity Rover KW - nickel KW - Mars Science Laboratory KW - sulfur KW - LIBS spectra KW - spectra KW - sedimentary structures KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824216177?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Diagenetic+features+analyzed+by+ChemCam%2FCuriosity+at+Pahrump+Hills%2C+Gale+Crater%2C+Mars&rft.au=Nachon%2C+Marion%3BMangold%2C+N%3BCousin%2C+Agnes%3BForni%2C+O%3BAnderson%2C+R+B%3BBlank%2C+J+G%3BCalef%2C+F%3BClegg%2C+S+M%3BFabre%2C+C%3BFisk%2C+M%3BGasnault%2C+O%3BKah%2C+L+C%3BKronyak%2C+R%3BLasue%2C+Jeremie%3BMeslin%2C+P+Y%3BLe+Mouelic%2C+S%3BMaurice%2C+Sylvestre%3BOehler%2C+D+Z%3BPayre%2C+V%3BRapin%2C+W%3BSumner%2C+D%3BStack%2C+K%3BSchroeder%2C+S%3BWiens%2C+Roger+C%3BAnonymous&rft.aulast=Nachon&rft.aufirst=Marion&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1524.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 10 N1 - PubXState - TX N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Accessed on March 16, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; ChemCam instrument; concretions; Curiosity Rover; diagenesis; emission spectra; Gale Crater; LIBS spectra; magnesium; Mars; Mars Science Laboratory; metals; nickel; Pahrump Hills; planets; secondary structures; sedimentary structures; spectra; sulfates; sulfur; terrestrial planets; veins ER - TY - JOUR T1 - Hydration state of calcium sulfate veins as observed by the ChemCam instrument AN - 1824215301; 2016-084261 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Rapin, W AU - Meslin, P Y AU - Schroeder, S AU - Nachon, Marion AU - Cousin, Agnes AU - Maurice, Sylvestre AU - Wiens, Roger C AU - Lasue, Jeremie AU - Blank, J G AU - Belgacem, I AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2966 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - calcium sulfate KW - anhydrite KW - irradiation KW - data processing KW - Mars KW - calibration KW - bassanite KW - Gale Crater KW - emission spectra KW - laboratory studies KW - gypsum KW - LIBS spectra KW - water content KW - spectra KW - synthetic materials KW - ChemCam instrument KW - experimental studies KW - sulfates KW - veins KW - terrestrial planets KW - planets KW - hydration KW - hydrogen KW - Mars Science Laboratory KW - dehydration KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215301?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Hydration+state+of+calcium+sulfate+veins+as+observed+by+the+ChemCam+instrument&rft.au=Rapin%2C+W%3BMeslin%2C+P+Y%3BSchroeder%2C+S%3BNachon%2C+Marion%3BCousin%2C+Agnes%3BMaurice%2C+Sylvestre%3BWiens%2C+Roger+C%3BLasue%2C+Jeremie%3BBlank%2C+J+G%3BBelgacem%2C+I%3BAnonymous&rft.aulast=Rapin&rft.aufirst=W&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2966.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 7 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on March 16, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - anhydrite; bassanite; calcium sulfate; calibration; ChemCam instrument; data processing; dehydration; emission spectra; experimental studies; Gale Crater; gypsum; hydration; hydrogen; irradiation; laboratory studies; LIBS spectra; Mars; Mars Science Laboratory; planets; spectra; sulfates; synthetic materials; terrestrial planets; veins; water content ER - TY - JOUR T1 - Updated perspective on ChemCam data through clustering AN - 1824215277; 2016-084275 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gasnault, O AU - Forni, O AU - Mangold, N AU - Wiens, Roger C AU - Meslin, P Y AU - Lasue, Jeremie AU - Pinet, P AU - Maurice, Sylvestre AU - Lewin, E AU - Anderson, R B AU - Clark, B AU - Melikechi, N AU - Newsom, H E AU - Sautter, V AU - Blank, J G AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2789 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - silicates KW - calcium sulfate KW - calcium KW - magnesium KW - K-feldspar KW - mafic composition KW - Mars KW - iron KW - Gale Crater KW - emission spectra KW - cluster analysis KW - alkali feldspar KW - Curiosity Rover KW - LIBS spectra KW - framework silicates KW - spectra KW - chemical composition KW - ChemCam instrument KW - alkaline earth metals KW - plagioclase KW - independent component analysis KW - statistical analysis KW - alkali metals KW - felsic composition KW - terrestrial planets KW - planets KW - titanium KW - metals KW - hydrogen KW - potassium KW - Mars Science Laboratory KW - feldspar group KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215277?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Updated+perspective+on+ChemCam+data+through+clustering&rft.au=Gasnault%2C+O%3BForni%2C+O%3BMangold%2C+N%3BWiens%2C+Roger+C%3BMeslin%2C+P+Y%3BLasue%2C+Jeremie%3BPinet%2C+P%3BMaurice%2C+Sylvestre%3BLewin%2C+E%3BAnderson%2C+R+B%3BClark%2C+B%3BMelikechi%2C+N%3BNewsom%2C+H+E%3BSautter%2C+V%3BBlank%2C+J+G%3BAnonymous&rft.aulast=Gasnault&rft.aufirst=O&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2789.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 18 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on March 21, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali feldspar; alkali metals; alkaline earth metals; calcium; calcium sulfate; ChemCam instrument; chemical composition; cluster analysis; Curiosity Rover; emission spectra; feldspar group; felsic composition; framework silicates; Gale Crater; hydrogen; independent component analysis; iron; K-feldspar; LIBS spectra; mafic composition; magnesium; Mars; Mars Science Laboratory; metals; plagioclase; planets; potassium; silicates; spectra; statistical analysis; terrestrial planets; titanium ER - TY - JOUR T1 - Relationship between MSL/ChemCam laser focus, plasma temperature, and compositional calibrations AN - 1824215199; 2016-084278 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Tokar, R L AU - Wiens, Roger C AU - Maurice, Sylvestre AU - Cousin, R AU - Gellert, R AU - Anderson, R B AU - Bender, S C AU - Clegg, S M AU - Dyar, M D AU - Fabre, C AU - Forni, O AU - Gasnault, O AU - Lasue, J AU - Melikechi, N AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1369 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - ChemCam instrument KW - Goldstone KW - alkaline earth metals KW - magnesium KW - chemical analysis KW - laser-induced breakdown spectroscopy KW - Windjana KW - Mars KW - calibration KW - temperature KW - emission spectroscopy KW - emission spectra KW - terrestrial planets KW - planets KW - metals KW - Mars Science Laboratory KW - LIBS spectra KW - spectra KW - spectroscopy KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215199?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Relationship+between+MSL%2FChemCam+laser+focus%2C+plasma+temperature%2C+and+compositional+calibrations&rft.au=Tokar%2C+R+L%3BWiens%2C+Roger+C%3BMaurice%2C+Sylvestre%3BCousin%2C+R%3BGellert%2C+R%3BAnderson%2C+R+B%3BBender%2C+S+C%3BClegg%2C+S+M%3BDyar%2C+M+D%3BFabre%2C+C%3BForni%2C+O%3BGasnault%2C+O%3BLasue%2C+J%3BMelikechi%2C+N%3BAnonymous&rft.aulast=Tokar&rft.aufirst=R&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1369.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 2 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on March 22, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; calibration; ChemCam instrument; chemical analysis; emission spectra; emission spectroscopy; Goldstone; instruments; laser-induced breakdown spectroscopy; LIBS spectra; magnesium; Mars; Mars Science Laboratory; metals; planets; spectra; spectroscopy; temperature; terrestrial planets; Windjana ER - TY - JOUR T1 - Pahrump soils and comparison with previous aeolian deposits AN - 1824215153; 2016-084266 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Cousin, Agnes AU - Schroeder, S AU - Meslin, P Y AU - Gasnault, O AU - Forni, O AU - Clark, B AU - Rapin, W AU - Lasue, Jeremie AU - Fressinet, C AU - Bridges, N AU - Clegg, S M AU - Fraeman, A A AU - Blank, J G AU - Maurice, Sylvestre AU - Wiens, Roger C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2767 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - eolian features KW - calcium KW - enrichment KW - halogens KW - Mars KW - emission spectra KW - Hidden Valley KW - Curiosity Rover KW - LIBS spectra KW - spectra KW - chemical composition KW - chromium KW - soils KW - chlorine KW - ChemCam instrument KW - alkaline earth metals KW - Dingo Gap KW - grain size KW - Rocknest KW - Pahrump Hills KW - terrestrial planets KW - planets KW - metals KW - hydrogen KW - fine-grained materials KW - Mars Science Laboratory KW - strontium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215153?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Pahrump+soils+and+comparison+with+previous+aeolian+deposits&rft.au=Cousin%2C+Agnes%3BSchroeder%2C+S%3BMeslin%2C+P+Y%3BGasnault%2C+O%3BForni%2C+O%3BClark%2C+B%3BRapin%2C+W%3BLasue%2C+Jeremie%3BFressinet%2C+C%3BBridges%2C+N%3BClegg%2C+S+M%3BFraeman%2C+A+A%3BBlank%2C+J+G%3BMaurice%2C+Sylvestre%3BWiens%2C+Roger+C%3BAnonymous&rft.aulast=Cousin&rft.aufirst=Agnes&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2767.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table, sketch map N1 - SuppNotes - Accessed on March 17, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; calcium; ChemCam instrument; chemical composition; chlorine; chromium; Curiosity Rover; Dingo Gap; emission spectra; enrichment; eolian features; fine-grained materials; grain size; halogens; Hidden Valley; hydrogen; LIBS spectra; Mars; Mars Science Laboratory; metals; Pahrump Hills; planets; Rocknest; soils; spectra; strontium; terrestrial planets ER - TY - JOUR T1 - Detection of phosphorous by ChemCam in Gale Crater AN - 1824215039; 2016-082034 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Blank, J G AU - Ollila, A M AU - Lanza, N L AU - Forni, Olivier AU - Mangold, Nicholas AU - Nachon, Marion AU - Clegg, S M AU - Yen, A AU - Maurice, Sylvestre AU - Wiens, Roger C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2850 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - ChemCam instrument KW - experimental studies KW - laser-induced breakdown spectroscopy KW - detection limit KW - phosphorus KW - Mars KW - calibration KW - Gale Crater KW - emission spectroscopy KW - terrestrial planets KW - planets KW - laboratory studies KW - detection KW - quantitative analysis KW - standard materials KW - spectra KW - spectroscopy KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215039?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Detection+of+phosphorous+by+ChemCam+in+Gale+Crater&rft.au=Blank%2C+J+G%3BOllila%2C+A+M%3BLanza%2C+N+L%3BForni%2C+Olivier%3BMangold%2C+Nicholas%3BNachon%2C+Marion%3BClegg%2C+S+M%3BYen%2C+A%3BMaurice%2C+Sylvestre%3BWiens%2C+Roger+C%3BAnonymous&rft.aulast=Blank&rft.aufirst=J&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2850.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 15 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Feb. 25, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calibration; ChemCam instrument; detection; detection limit; emission spectroscopy; experimental studies; Gale Crater; instruments; laboratory studies; laser-induced breakdown spectroscopy; Mars; phosphorus; planets; quantitative analysis; spectra; spectroscopy; standard materials; terrestrial planets ER - TY - JOUR T1 - Detecting high manganese phased in Curiosity Mastcam multispectral images and ChemCam passive visible to near infrared spectra AN - 1824215028; 2016-082036 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Hardgrove, Craig AU - Johnson, J AU - Lanza, N AU - Rice, M S AU - Bell, J AU - Kinch, K AU - Wellington, D AU - Arvidson, R E AU - Godber, A AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2748 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - ChemCam instrument KW - near-infrared spectra KW - imagery KW - experimental studies KW - optical spectra KW - Mars KW - manganese KW - emission spectra KW - terrestrial planets KW - multispectral analysis KW - planets KW - Mastcam KW - laboratory studies KW - detection KW - metals KW - Curiosity Rover KW - Mars Science Laboratory KW - manganese oxides KW - oxides KW - LIBS spectra KW - spectra KW - reflectance KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215028?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Detecting+high+manganese+phased+in+Curiosity+Mastcam+multispectral+images+and+ChemCam+passive+visible+to+near+infrared+spectra&rft.au=Hardgrove%2C+Craig%3BJohnson%2C+J%3BLanza%2C+N%3BRice%2C+M+S%3BBell%2C+J%3BKinch%2C+K%3BWellington%2C+D%3BArvidson%2C+R+E%3BGodber%2C+A%3BAnonymous&rft.aulast=Hardgrove&rft.aufirst=Craig&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2748.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 8 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Feb. 29, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - ChemCam instrument; Curiosity Rover; detection; emission spectra; experimental studies; imagery; laboratory studies; LIBS spectra; manganese; manganese oxides; Mars; Mars Science Laboratory; Mastcam; metals; multispectral analysis; near-infrared spectra; optical spectra; oxides; planets; reflectance; spectra; terrestrial planets ER - TY - JOUR T1 - Discovering chemical structure in ChemCam targets using Gaussian graphical models; compositional trends with depth AN - 1824214989; 2016-084276 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Oyen, D A AU - Lanza, N L AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2940 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - calcium KW - magnesium KW - Mars KW - Gaussian graphical models KW - emission spectra KW - visualization KW - Bell Island KW - sediments KW - LIBS spectra KW - spectra KW - chemical composition KW - ChemCam instrument KW - alkaline earth metals KW - clastic sediments KW - veins KW - depth KW - terrestrial planets KW - models KW - planets KW - metals KW - dust KW - Mars Science Laboratory KW - sulfur KW - graphic methods KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214989?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Discovering+chemical+structure+in+ChemCam+targets+using+Gaussian+graphical+models%3B+compositional+trends+with+depth&rft.au=Oyen%2C+D+A%3BLanza%2C+N+L%3BAnonymous&rft.aulast=Oyen&rft.aufirst=D&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2940.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on March 21, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Bell Island; calcium; ChemCam instrument; chemical composition; clastic sediments; depth; dust; emission spectra; Gaussian graphical models; graphic methods; LIBS spectra; magnesium; Mars; Mars Science Laboratory; metals; models; planets; sediments; spectra; sulfur; terrestrial planets; veins; visualization ER - TY - JOUR T1 - ChemCam investigation of the John Klein and Cumberland drill tailings AN - 1824214965; 2016-084263 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Jackson, R S AU - Wiens, Roger C AU - Newsom, H E AU - Vaniman, D T AU - Beegle, L W AU - Maurice, Sylvestre AU - Williams, J M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2301 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - calcium sulfate KW - calcium KW - John Klein KW - Mars KW - Sheepbed Member KW - emission spectra KW - Cumberland KW - mixing KW - LIBS spectra KW - spectra KW - drilling KW - basaltic composition KW - ChemCam instrument KW - bedrock KW - alkaline earth metals KW - host rocks KW - Yellowknife Bay Formation KW - veins KW - terrestrial planets KW - planets KW - boreholes KW - metals KW - diagenesis KW - Mars Science Laboratory KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214965?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=ChemCam+investigation+of+the+John+Klein+and+Cumberland+drill+tailings&rft.au=Jackson%2C+R+S%3BWiens%2C+Roger+C%3BNewsom%2C+H+E%3BVaniman%2C+D+T%3BBeegle%2C+L+W%3BMaurice%2C+Sylvestre%3BWilliams%2C+J+M%3BAnonymous&rft.aulast=Jackson&rft.aufirst=R&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2301.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 4 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on March 16, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; basaltic composition; bedrock; boreholes; calcium; calcium sulfate; ChemCam instrument; Cumberland; diagenesis; drilling; emission spectra; host rocks; John Klein; LIBS spectra; Mars; Mars Science Laboratory; metals; mixing; planets; Sheepbed Member; spectra; terrestrial planets; veins; Yellowknife Bay Formation ER - TY - JOUR T1 - Fluorine and lithium at the Kimberley outcrop, Gale Crater AN - 1824213844; 2016-082032 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Forni, Olivier AU - Vaniman, D T AU - Le Deit, Laetitia AU - Clegg, S M AU - Lanza, N L AU - Lasue, Jeremie AU - Bish, David L AU - Mangold, Nicholas AU - Wiens, Roger C AU - Meslin, P Y AU - Gasnault, Olivier AU - Maurice, Sylvestre AU - Cousin, A AU - Toplis, M J AU - Newsom, Horton AU - Rampe, E B AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1989 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - silicates KW - halides KW - alteration KW - fluorides KW - halogens KW - sandstone KW - Mars KW - temperature KW - Gale Crater KW - emission spectra KW - sedimentary rocks KW - major elements KW - fluorine KW - siltstone KW - Curiosity Rover KW - LIBS spectra KW - spectra KW - fluorite KW - ChemCam instrument KW - Aeolis Palus KW - lithium KW - alkali metals KW - smectite KW - Kimberley Formation KW - conglomerate KW - clay minerals KW - terrestrial planets KW - planets KW - metals KW - Mars Science Laboratory KW - sheet silicates KW - clastic rocks KW - Dillinger Member KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213844?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Fluorine+and+lithium+at+the+Kimberley+outcrop%2C+Gale+Crater&rft.au=Forni%2C+Olivier%3BVaniman%2C+D+T%3BLe+Deit%2C+Laetitia%3BClegg%2C+S+M%3BLanza%2C+N+L%3BLasue%2C+Jeremie%3BBish%2C+David+L%3BMangold%2C+Nicholas%3BWiens%2C+Roger+C%3BMeslin%2C+P+Y%3BGasnault%2C+Olivier%3BMaurice%2C+Sylvestre%3BCousin%2C+A%3BToplis%2C+M+J%3BNewsom%2C+Horton%3BRampe%2C+E+B%3BAnonymous&rft.aulast=Forni&rft.aufirst=Olivier&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1989.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 17 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Feb. 25, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Aeolis Palus; alkali metals; alteration; ChemCam instrument; clastic rocks; clay minerals; conglomerate; Curiosity Rover; Dillinger Member; emission spectra; fluorides; fluorine; fluorite; Gale Crater; halides; halogens; Kimberley Formation; LIBS spectra; lithium; major elements; Mars; Mars Science Laboratory; metals; planets; sandstone; sedimentary rocks; sheet silicates; silicates; siltstone; smectite; spectra; temperature; terrestrial planets ER - TY - JOUR T1 - Detection of Zn with ChemCam on Mars AN - 1824213641; 2016-082035 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Lasue, Jeremie AU - Clegg, S M AU - Forni, Olivier AU - Cousin, A AU - Wiens, Roger C AU - Lanza, N AU - Mangold, Nicholas AU - Gasnault, Olivier AU - Maurice, Sylvestre AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1413 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - ChemCam instrument KW - zinc KW - oxidation KW - enrichment KW - statistical analysis KW - sphalerite KW - Mars KW - Kimberley Formation KW - manganese KW - weathering KW - Gale Crater KW - emission spectra KW - terrestrial planets KW - planets KW - detection KW - quantitative analysis KW - multivariate analysis KW - metals KW - oxides KW - LIBS spectra KW - spectra KW - sulfides KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213641?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Detection+of+Zn+with+ChemCam+on+Mars&rft.au=Lasue%2C+Jeremie%3BClegg%2C+S+M%3BForni%2C+Olivier%3BCousin%2C+A%3BWiens%2C+Roger+C%3BLanza%2C+N%3BMangold%2C+Nicholas%3BGasnault%2C+Olivier%3BMaurice%2C+Sylvestre%3BAnonymous&rft.aulast=Lasue&rft.aufirst=Jeremie&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1413.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 10 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Feb. 29, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - ChemCam instrument; detection; emission spectra; enrichment; Gale Crater; Kimberley Formation; LIBS spectra; manganese; Mars; metals; multivariate analysis; oxidation; oxides; planets; quantitative analysis; spectra; sphalerite; statistical analysis; sulfides; terrestrial planets; weathering; zinc ER - TY - JOUR T1 - The diversity of sediments at Gale Crater from ChemCam observations; evidence for multiple sediment source chemistries, diverse alteration histories, and multiple diagenetic episodes AN - 1824213551; 2016-082029 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Blaney, D L AU - Wiens, Roger C AU - Maurice, Sylvestre AU - Anderson, Ryan AU - Bridges, John AU - Clegg, S M AU - Le Deit, Laetitia AU - Fisk, Martin AU - Forni, Olivier AU - Gasnault, Olivier AU - Kah, Linda AU - Lanza, Nina AU - Lasue, Jeremie AU - Mangold, Nicholas AU - Nachon, Marion AU - Newsom, Horton AU - Piller, Agnes AU - Sautter, Violaine AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2093 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - halides KW - calcium sulfate KW - alteration KW - magnesium KW - fluorides KW - sandstone KW - Mars KW - silicon KW - manganese KW - iron KW - Gale Crater KW - emission spectra KW - sedimentary rocks KW - aluminum KW - Curiosity Rover KW - LIBS spectra KW - ChemCam KW - spectra KW - heterogeneity KW - Yellowknife Bay KW - alkaline earth metals KW - mudstone KW - magnesium sulfates KW - veins KW - terrestrial planets KW - planets KW - titanium KW - metals KW - diagenesis KW - Mars Science Laboratory KW - clastic rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213551?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=The+diversity+of+sediments+at+Gale+Crater+from+ChemCam+observations%3B+evidence+for+multiple+sediment+source+chemistries%2C+diverse+alteration+histories%2C+and+multiple+diagenetic+episodes&rft.au=Blaney%2C+D+L%3BWiens%2C+Roger+C%3BMaurice%2C+Sylvestre%3BAnderson%2C+Ryan%3BBridges%2C+John%3BClegg%2C+S+M%3BLe+Deit%2C+Laetitia%3BFisk%2C+Martin%3BForni%2C+Olivier%3BGasnault%2C+Olivier%3BKah%2C+Linda%3BLanza%2C+Nina%3BLasue%2C+Jeremie%3BMangold%2C+Nicholas%3BNachon%2C+Marion%3BNewsom%2C+Horton%3BPiller%2C+Agnes%3BSautter%2C+Violaine%3BAnonymous&rft.aulast=Blaney&rft.aufirst=D&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2093.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 19 N1 - PubXState - TX N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Accessed on Feb. 23, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; alteration; aluminum; calcium sulfate; ChemCam; clastic rocks; Curiosity Rover; diagenesis; emission spectra; fluorides; Gale Crater; halides; heterogeneity; iron; LIBS spectra; magnesium; magnesium sulfates; manganese; Mars; Mars Science Laboratory; metals; mudstone; planets; sandstone; sedimentary rocks; silicon; spectra; terrestrial planets; titanium; veins; Yellowknife Bay ER - TY - JOUR T1 - ChemCam chemostratigraphy of the Pahrump outcrop, Gale Crater AN - 1824213516; 2016-082033 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Forni, Olivier AU - Mangold, Nicholas AU - Blaney, D L AU - Fisk, M AU - Wiens, Roger C AU - Meslin, P Y AU - Nachon, Marion AU - Gasnault, Olivier AU - Maurice, Sylvestre AU - Cousin, A AU - Le Mouelic, S AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2099 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - ChemCam instrument KW - lithium KW - alkali metals KW - Mars KW - Gale Crater KW - emission spectra KW - terrestrial planets KW - planets KW - titanium KW - metals KW - diagenesis KW - aluminum KW - Pahrump KW - Mars Science Laboratory KW - chemostratigraphy KW - LIBS spectra KW - spectra KW - chemical composition KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213516?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=ChemCam+chemostratigraphy+of+the+Pahrump+outcrop%2C+Gale+Crater&rft.au=Forni%2C+Olivier%3BMangold%2C+Nicholas%3BBlaney%2C+D+L%3BFisk%2C+M%3BWiens%2C+Roger+C%3BMeslin%2C+P+Y%3BNachon%2C+Marion%3BGasnault%2C+Olivier%3BMaurice%2C+Sylvestre%3BCousin%2C+A%3BLe+Mouelic%2C+S%3BAnonymous&rft.aulast=Forni&rft.aufirst=Olivier&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2099.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 10 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Feb. 25, 2016 N1 - Last updated - 2016-09-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali metals; aluminum; ChemCam instrument; chemical composition; chemostratigraphy; diagenesis; emission spectra; Gale Crater; LIBS spectra; lithium; Mars; Mars Science Laboratory; metals; Pahrump; planets; spectra; terrestrial planets; titanium ER - TY - JOUR T1 - Testing of downgradient uranium mobility at an in-situ recovery mining site AN - 1819897125; 2016-078010 AB - In-situ recovery (ISR) mining of uranium involves the injection of O (sub 2) and CO (sub 2) (or NaHCO (sub 3) ) into saturated roll-front deposits to oxidize and solubilize the uranium, which is then removed by ion exchange at the surface and processed into U (sub 3) O (sub 8) . While ISR is economical and environmentally-friendly relative to conventional mining, one of the challenges of extracting uranium by this process is that it leaves behind a geochemically-altered aquifer that is exceedingly difficult to restore to pre-mining geochemical conditions, a regulatory objective. In this research, we evaluated the ability of the aquifer downgradient of an ISR mining area to attenuate the transport of uranium and other problem constituents that are mobilized by the mining process. Such an evaluation can help inform both regulators and the mining industry as to how much restoration of the mined ore zone is necessary to achieve regulatory compliance at various distances downgradient of the mining zone even if complete restoration of the ore zone proves to be difficult or impossible. Any reduction in the amount of active restoration necessary will translate into water and cost savings. Three single-well push-pull tests were conducted in which water from an unrestored, previously-mined ore zone was injected into an unmined ore zone that served as a geochemical proxy for the downgradient aquifer. In all the tests, non-reactive tracers were injected with the previously-mined ore zone water to allow the transport of uranium to be compared to that of the nonreactive species, and it was shown that the recovery of uranium relative to the nonreactive tracers ranged from 12-25%. This result suggests significant attenuation capacity of the aquifer, especially considering the rather limited interrogation volume of the single-well test method. Uranium isotope analyses were inconclusive regarding the fate of the unrecovered uranium (i.e., adsorption or reduction). Reduction would, in principle, provide much longer-lasting immobilization than adsorption, especially given the inherent reducing characteristics of roll-front systems. A cross-well tracer test is planned to further evaluate uranium attenuation mechanisms in the downgradient aquifer at the site. JF - Abstracts with Programs - Geological Society of America AU - Reimus, Paul W AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 691 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819897125?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Testing+of+downgradient+uranium+mobility+at+an+in-situ+recovery+mining+site&rft.au=Reimus%2C+Paul+W%3BAnonymous&rft.aulast=Reimus&rft.aufirst=Paul&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=691&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-09-16 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Correlated Pd-Ru-Mo nucleosynthetic anomalies in meteorites reflect nebular processing AN - 1819895881; 2016-079849 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Mayer, Bernhard AU - Humayun, M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 2065 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - palladium KW - stony meteorites KW - Gujba Meteorite KW - isotopes KW - calcium-aluminum inclusions KW - anomalies KW - carbonaceous chondrites KW - CV chondrites KW - platinum group KW - solar nebula KW - meteorites KW - iron meteorites KW - molybdenum KW - metals KW - inclusions KW - chondrites KW - ruthenium KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819895881?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Correlated+Pd-Ru-Mo+nucleosynthetic+anomalies+in+meteorites+reflect+nebular+processing&rft.au=Mayer%2C+Bernhard%3BHumayun%2C+M%3BAnonymous&rft.aulast=Mayer&rft.aufirst=Bernhard&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=2065&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/2065.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - anomalies; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; CV chondrites; Gujba Meteorite; inclusions; iron meteorites; isotopes; metals; meteorites; molybdenum; palladium; platinum group; ruthenium; solar nebula; stony meteorites ER - TY - JOUR T1 - Nucleosynthetic anomalies in palladium from IAB, IVA, and IVB iron meteorites AN - 1819893781; 2016-077739 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Mayer, B AU - Humayun, M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1265 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - Gibeon Meteorite KW - palladium KW - IAB iron meteorites KW - isotopes KW - cosmogenic elements KW - anomalies KW - octahedrite KW - nucleosynthesis KW - platinum group KW - meteorites KW - IVB iron meteorites KW - IVA iron meteorites KW - iron meteorites KW - platinum KW - molybdenum KW - metals KW - cosmic rays KW - corrections KW - s-process KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819893781?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Nucleosynthetic+anomalies+in+palladium+from+IAB%2C+IVA%2C+and+IVB+iron+meteorites&rft.au=Mayer%2C+B%3BHumayun%2C+M%3BAnonymous&rft.aulast=Mayer&rft.aufirst=B&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1265.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 15 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jan. 20, 2016 N1 - Last updated - 2016-11-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - anomalies; corrections; cosmic rays; cosmogenic elements; Gibeon Meteorite; IAB iron meteorites; iron meteorites; isotopes; IVA iron meteorites; IVB iron meteorites; metals; meteorites; molybdenum; nucleosynthesis; octahedrite; palladium; platinum; platinum group; s-process ER - TY - JOUR T1 - What can Curiosity's study of Gale Crater tell us about Mars' ancient climate? AN - 1807506903; 2016-065848 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Vasavada, A R AU - Grotzinger, J P AU - Gupta, S AU - Haberle, R M AU - Mischna, M A AU - Richardson, M I AU - Wiens, Roger C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2161 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - Yellowknife Bay KW - paleohydrology KW - Murray Formation KW - paleoatmosphere KW - sandstone KW - Mars KW - paleoclimatology KW - Pahrump Hills KW - Gale Crater KW - terrestrial planets KW - aqueous alteration KW - planets KW - sedimentary rocks KW - paleoenvironment KW - Curiosity Rover KW - Mars Science Laboratory KW - lacustrine environment KW - deltaic environment KW - sedimentary structures KW - Mount Sharp KW - fluvial environment KW - clastic rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807506903?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=What+can+Curiosity%27s+study+of+Gale+Crater+tell+us+about+Mars%27+ancient+climate%3F&rft.au=Vasavada%2C+A+R%3BGrotzinger%2C+J+P%3BGupta%2C+S%3BHaberle%2C+R+M%3BMischna%2C+M+A%3BRichardson%2C+M+I%3BWiens%2C+Roger+C%3BAnonymous&rft.aulast=Vasavada&rft.aufirst=A&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2161.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - SuppNotes - Accessed on Mar. 7, 2016 N1 - Last updated - 2016-07-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - aqueous alteration; clastic rocks; Curiosity Rover; deltaic environment; fluvial environment; Gale Crater; lacustrine environment; Mars; Mars Science Laboratory; Mount Sharp; Murray Formation; Pahrump Hills; paleoatmosphere; paleoclimatology; paleoenvironment; paleohydrology; planets; sandstone; sedimentary rocks; sedimentary structures; terrestrial planets; Yellowknife Bay ER - TY - JOUR T1 - Diagenetic crystal clusters and dendrites, lower Mount Sharp, Gale Crater AN - 1807506792; 2016-065855 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Kah, Linda C AU - Kronyak, R AU - Van Beek, J AU - Nachon, M AU - Mangold, N AU - Thompson, L AU - Wiens, R AU - Grotzinger, J AU - Farmer, J AU - Minitti, M E AU - Shieber, J AU - Oehler, D AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1901 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - zinc KW - dendrites KW - Mars KW - crystal growth KW - Gale Crater KW - emission spectra KW - fractures KW - sedimentary rocks KW - Curiosity Rover KW - LIBS spectra KW - spectra KW - sedimentary structures KW - mudstone KW - magnesium sulfates KW - laminations KW - MAHLI KW - Pahrump Hills KW - Mars Hand Lens Imager KW - terrestrial planets KW - crystals KW - planets KW - planar bedding structures KW - metals KW - diagenesis KW - nickel KW - Mars Science Laboratory KW - Mount Sharp KW - clastic rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807506792?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Diagenetic+crystal+clusters+and+dendrites%2C+lower+Mount+Sharp%2C+Gale+Crater&rft.au=Kah%2C+Linda+C%3BKronyak%2C+R%3BVan+Beek%2C+J%3BNachon%2C+M%3BMangold%2C+N%3BThompson%2C+L%3BWiens%2C+R%3BGrotzinger%2C+J%3BFarmer%2C+J%3BMinitti%2C+M+E%3BShieber%2C+J%3BOehler%2C+D%3BAnonymous&rft.aulast=Kah&rft.aufirst=Linda&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1901.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Mar. 8, 2016 N1 - Last updated - 2016-07-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - clastic rocks; crystal growth; crystals; Curiosity Rover; dendrites; diagenesis; emission spectra; fractures; Gale Crater; laminations; LIBS spectra; magnesium sulfates; MAHLI; Mars; Mars Hand Lens Imager; Mars Science Laboratory; metals; Mount Sharp; mudstone; nickel; Pahrump Hills; planar bedding structures; planets; sedimentary rocks; sedimentary structures; spectra; terrestrial planets; zinc ER - TY - JOUR T1 - Centimeter to decimeter size spherical and cylindrical features in Gale Crater sediments AN - 1807506741; 2016-065856 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Wiens, Roger C AU - Maurice, Sylvestre AU - Gasnault, O AU - Clegg, S AU - Fabre, C AU - Nachon, M AU - Rubin, D M AU - Goetz, W AU - Mangold, N AU - Schroeder, S AU - Rapin, W AU - Milliken, Ralph E AU - Fairen, A G AU - Oehler, D AU - Forni, O AU - Sautter, V AU - Blaney, D AU - Le Mouelic, S AU - Anderson, R B AU - Cousin, A AU - Vasavada, A R AU - Grotzinger, J AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1249 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - Yellowknife Bay KW - calcium KW - alkaline earth metals KW - Mars KW - iron-rich composition KW - Gale Crater KW - emission spectra KW - terrestrial planets KW - morphology KW - planets KW - sedimentary rocks KW - metals KW - Curiosity Rover KW - surface features KW - sediments KW - Mars Science Laboratory KW - LIBS spectra KW - ChemCam KW - spectra KW - chemical composition KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807506741?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Centimeter+to+decimeter+size+spherical+and+cylindrical+features+in+Gale+Crater+sediments&rft.au=Wiens%2C+Roger+C%3BMaurice%2C+Sylvestre%3BGasnault%2C+O%3BClegg%2C+S%3BFabre%2C+C%3BNachon%2C+M%3BRubin%2C+D+M%3BGoetz%2C+W%3BMangold%2C+N%3BSchroeder%2C+S%3BRapin%2C+W%3BMilliken%2C+Ralph+E%3BFairen%2C+A+G%3BOehler%2C+D%3BForni%2C+O%3BSautter%2C+V%3BBlaney%2C+D%3BLe+Mouelic%2C+S%3BAnderson%2C+R+B%3BCousin%2C+A%3BVasavada%2C+A+R%3BGrotzinger%2C+J%3BAnonymous&rft.aulast=Wiens&rft.aufirst=Roger&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1249.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 4 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Mar. 8, 2016 N1 - Last updated - 2016-11-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; calcium; ChemCam; chemical composition; Curiosity Rover; emission spectra; Gale Crater; iron-rich composition; LIBS spectra; Mars; Mars Science Laboratory; metals; morphology; planets; sedimentary rocks; sediments; spectra; surface features; terrestrial planets; Yellowknife Bay ER - TY - JOUR T1 - The chemostratigraphy of lower Mt. Sharp; rover-scale observations to test orbital-scale hypotheses AN - 1807505683; 2016-065851 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Milliken, Ralph E AU - Hurowitz, J A AU - Grotzinger, J AU - Wiens, R AU - Blaney, D AU - Martin-Torres, J AU - Zorzano, M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2339 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - calcium KW - magnesium KW - Alpha Particle X-ray Spectrometer KW - halogens KW - Mars KW - iron KW - emission spectra KW - chemostratigraphy KW - LIBS spectra KW - ChemCam KW - spectra KW - chemical composition KW - chlorine KW - bedrock KW - alkaline earth metals KW - bromine KW - Pahrump Hills KW - terrestrial planets KW - planets KW - evaporite deposits KW - metals KW - diagenesis KW - sulfur KW - Mount Sharp KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807505683?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=The+chemostratigraphy+of+lower+Mt.+Sharp%3B+rover-scale+observations+to+test+orbital-scale+hypotheses&rft.au=Milliken%2C+Ralph+E%3BHurowitz%2C+J+A%3BGrotzinger%2C+J%3BWiens%2C+R%3BBlaney%2C+D%3BMartin-Torres%2C+J%3BZorzano%2C+M%3BAnonymous&rft.aulast=Milliken&rft.aufirst=Ralph&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2339.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Mar. 7, 2016 N1 - Last updated - 2016-11-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Alpha Particle X-ray Spectrometer; bedrock; bromine; calcium; ChemCam; chemical composition; chemostratigraphy; chlorine; diagenesis; emission spectra; evaporite deposits; halogens; iron; LIBS spectra; magnesium; Mars; metals; Mount Sharp; Pahrump Hills; planets; spectra; sulfur; terrestrial planets ER - TY - JOUR T1 - Oxygen isotopic variations in modern cetacean teeth and bones; implications for paleoecological, paleoclimatic and paleoceanographic studies AN - 1800396438; 2016-055503 AB - The oxygen isotope ratios (delta (super 18) O) preserved in marine sediments have been widely used to reconstruct past ocean temperatures. However, there remain significant uncertainties associated with this method, owing to assumptions about the delta (super 18) O of ancient seawater which affects the temperature inferred from sediment delta (super 18) O records. In this study, oxygen isotope compositions of phosphate in teeth and bones from a diverse group of modern cetaceans, including sperm whale, pygmy sperm whale, short-finned pilot whale, killer whale and Cuvier's beaked whale, and three fossil whales were determined. The data were used to assess if the oxygen isotope ratios of biogenic phosphate (delta (super 18) O (sub p) ) from cetaceans are a reliable proxy for the oxygen isotopic composition of ocean water (delta (super 18) O (sub w) ). The delta (super 18) O (sub p) values of modern cetaceans range from 15.5 ppm to 21.3 ppm, averaging 19.6+ or -0.8 ppm (n=136). Using a greatly expanded global cetacean delta (super 18) O (sub p) dataset, the following regression equation is derived for cetaceans: delta (super 18) O (sub w) = 0.95317(+0.03293) delta (super 18) O (sub p) -17.971(+0.605), r = 0.97253. The new equation, when applied to fossil cetacean teeth and bones, yielded reasonable estimates of ancient seawater delta (super 18) O (sub w) values. Intra-tooth oxygen isotopic variations within a whale tooth record changes in the isotopic composition of environmental water during the time of tooth growth, providing insights into the life history or migratory behavior of the whale. The results from this study demonstrated the potential of using oxygen isotopes in the phosphate component of cetacean teeth and bones to examine the migratory behaviors and environmental preferences of both modern and ancient whales and to track past changes in ocean water oxygen isotopic composition. JF - Abstracts with Programs - Geological Society of America AU - Ciner, Burcu AU - Wang, Yang AU - Parker, William AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 641 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 11:Vertebrate paleontology KW - 12:Stratigraphy KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800396438?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Oxygen+isotopic+variations+in+modern+cetacean+teeth+and+bones%3B+implications+for+paleoecological%2C+paleoclimatic+and+paleoceanographic+studies&rft.au=Ciner%2C+Burcu%3BWang%2C+Yang%3BParker%2C+William%3BAnonymous&rft.aulast=Ciner&rft.aufirst=Burcu&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=641&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-06-30 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Tectonic controls on the state of stress from the plate- to reservoir-scale AN - 1800395487; 2016-057748 AB - The state of stress controls all in-situ reservoir activities (e.g., fracture orientation, fluid flow, wellbore breakout, fault failure, etc.), and yet we lack the quantitative means to measure it. This issue is becoming increasingly important in light of the fact that the subsurface provides more than 80 percent of the energy used in the U.S. and serves as a vast reservoir for CO (sub 2) , nuclear waste, and energy storage. Adaptive control of subsurface fractures and fluid flow is a crosscutting challenge being addressed by the new DOE Subsurface Technology and Engineering Research, Development, and Demonstration (SubTER) Crosscut initiative that has the potential to transform subsurface energy production and waste storage strategies. A critical aspect of this initiative is improving our understanding of the tectonic influence on the state of stress. Until recently, present-day crustal stresses were widely thought to be oriented parallel to plate motion and thus controlled by plate boundary forces. However, recent stress and GPS data reveal that stresses are not aligned with plate motion in many regions (Australia, Europe, South America, Asia), suggesting a strong influence of intra-plate forces on the tectonic stress pattern. Here we combine information from the World Stress Map dataset with numerical modeling to evaluate the tectonic influence on the state of stress in a plate with good alignment between plate motion and the observed SHmax orientation (North America) and in a plate where the SHmax orientation is at odds with plate motion (Australia). The plate-scale stresses establish the background or ambient state of stress that is locally modulated at the reservoir-scale by material and structural features. Evaluation of this stress modulation and its influence on fault and fracture dynamics is facilitated by the use of high fidelity geologic framework models (GFMs) that integrate geologic data, provide numerical meshes for geomechanical modeling, and provide the means to conduct uncertainty quantification. An important utility of GFMs is their use for identifying critically stressed faults and evaluating seismic hazard associated with anthropogenic subsurface activities. JF - Abstracts with Programs - Geological Society of America AU - Snelson, Catherine M AU - Coblentz, David AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 616 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 18:Solid-earth geophysics KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800395487?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Tectonic+controls+on+the+state+of+stress+from+the+plate-+to+reservoir-scale&rft.au=Snelson%2C+Catherine+M%3BCoblentz%2C+David%3BAnonymous&rft.aulast=Snelson&rft.aufirst=Catherine&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=616&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-06-30 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Overview of 3 years of ChemCam chemical compositions along the Curiosity's traverse at Gale Crater, Mars AN - 1800395004; 2016-057671 AB - Curiosity rover has been on Gale crater for approximately 3 years now. It has driven for >10 km from its landing site up to the base of Mount Sharp. The ChemCam instrument, using the LIBS technique, has been widely used in order to assess the chemistry of rocks & soils remotely, as well as to produce images up to the horizon. ChemCam has sampled >1000 targets, corresponding to more than 250000 laser shots and more than 5000 context images. A major LIBS recalibration using >350 standards was recently completed in order to improve our accuracy. In this study we will highlight the characteristic of each important unit that the rover went through, using this new calibration for ChemCam. The Bradbury landing site (sols 0-53; 326-520), a plain located at a distal portion of the alluvial fan from Peace Vallis, exposed several float rocks as well as some conglomerates. These rocks have igneous compositions ranging from mafic up to trachytic end-member. These observations provided an important clue concerning the diversity of early Mars magmatism that was not previously recognized. Another area, called Sheepbed (sols 126-300), is essentially composed of mudstones. Curiosity performed its first drill sampling at this location. The mudstones show a very homogeneous composition, close to the average Martian crust. The nearby Shaler fluvial sandstone outcrop (sols 306-325), the first outcrop of potential deltaic foreset beds, shows K enrichment. This enrichment is also observed at the Kimberley formation (another drill site flanked by foreset beds), located at 7 km SW of Shaler, with up to 5.3 wt% at the Mount Remarkable member. The Pahrump outcrop (sols 801-919) corresponds to the first observed material at Mt Sharp's base, and present a diverse composition, suggesting a stronger alteration. Further along the traverse, light-toned Murray unit (sols 992 on) contained an outcrop highly enriched in SiO2 (75-85 wt%) and TiO2, where a drill has just been performed. ChemCam also analyzed more than 200 soil locations. The analyses indicated that fine soil compositions are similar to elsewhere on Mars, with some hydration. Overall, ChemCam has observed a wide variety of rocks, from sedimentary to igneous, with a large diversity of chemistry and implied formation processes. JF - Abstracts with Programs - Geological Society of America AU - Cousin, Agnes AU - Wiens, R C AU - Maurice, Sylvestre AU - Gasnault, Olivier AU - Clegg, Sam M AU - Forni, Olivier AU - Anderson, Ryan B AU - Lasue, Jeremie AU - Frydenvang, Jens AU - Payre, Valerie AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 602 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800395004?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Overview+of+3+years+of+ChemCam+chemical+compositions+along+the+Curiosity%27s+traverse+at+Gale+Crater%2C+Mars&rft.au=Cousin%2C+Agnes%3BWiens%2C+R+C%3BMaurice%2C+Sylvestre%3BGasnault%2C+Olivier%3BClegg%2C+Sam+M%3BForni%2C+Olivier%3BAnderson%2C+Ryan+B%3BLasue%2C+Jeremie%3BFrydenvang%2C+Jens%3BPayre%2C+Valerie%3BAnonymous&rft.aulast=Cousin&rft.aufirst=Agnes&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=602&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-10-25 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Depth distribution of solar wind He implanted into NASA Genesis targets AN - 1797535313; 2016-052842 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Yurimoto, H AU - Bajo, K AU - Olinger, C T AU - Jurewicz, A J G AU - Burnett, D S AU - Sakaguchi, I AU - Suzuki, T T AU - Itose, S AU - Ishihara, M AU - Uchino, K AU - Wieler, R AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 3554 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - solar system KW - concentration KW - experimental studies KW - irradiation KW - Genesis Mission KW - isotopes KW - solar wind KW - interplanetary space KW - He-4 KW - ions KW - weathering KW - stable isotopes KW - samples KW - depth KW - space weathering KW - noble gases KW - helium KW - solar activity KW - 04:Extraterrestrial geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797535313?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Depth+distribution+of+solar+wind+He+implanted+into+NASA+Genesis+targets&rft.au=Yurimoto%2C+H%3BBajo%2C+K%3BOlinger%2C+C+T%3BJurewicz%2C+A+J+G%3BBurnett%2C+D+S%3BSakaguchi%2C+I%3BSuzuki%2C+T+T%3BItose%2C+S%3BIshihara%2C+M%3BUchino%2C+K%3BWieler%2C+R%3BAnonymous&rft.aulast=Yurimoto&rft.aufirst=H&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=3554&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/3554.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt conference 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-06-17 N1 - SubjectsTermNotLitGenreText - concentration; depth; experimental studies; Genesis Mission; He-4; helium; interplanetary space; ions; irradiation; isotopes; noble gases; samples; solar activity; solar system; solar wind; space weathering; stable isotopes; weathering ER - TY - JOUR T1 - Global variations in redox at oceanic ridges inferred from V/Sc ratios AN - 1797535307; 2016-052796 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Yang, S AU - Humayun, M AU - Salters, V J M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 3508 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - silicates KW - volcanic rocks KW - glasses KW - igneous rocks KW - partial melting KW - mass spectra KW - mantle KW - vanadium KW - pyroxene group KW - clinopyroxene KW - carbon KW - basalts KW - spectra KW - rare earths KW - V/Sc KW - ocean floors KW - chemical ratios KW - Eh KW - chain silicates KW - ICP mass spectra KW - volcanic glass KW - metals KW - magmas KW - mid-ocean ridge basalts KW - scandium KW - fractional crystallization KW - Gd/Yb KW - mid-ocean ridges KW - 02C:Geochemistry of rocks, soils, and sediments KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797535307?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Global+variations+in+redox+at+oceanic+ridges+inferred+from+V%2FSc+ratios&rft.au=Yang%2C+S%3BHumayun%2C+M%3BSalters%2C+V+J+M%3BAnonymous&rft.aulast=Yang&rft.aufirst=S&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=3508&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/3508.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt conference 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 2 N1 - Last updated - 2016-06-17 N1 - SubjectsTermNotLitGenreText - basalts; carbon; chain silicates; chemical ratios; clinopyroxene; Eh; fractional crystallization; Gd/Yb; glasses; ICP mass spectra; igneous rocks; magmas; mantle; mass spectra; metals; mid-ocean ridge basalts; mid-ocean ridges; ocean floors; partial melting; pyroxene group; rare earths; scandium; silicates; spectra; V/Sc; vanadium; volcanic glass; volcanic rocks ER - TY - JOUR T1 - Multiple scale (and multi-scale) reactive transport modeling of terrestrial systems AN - 1797532241; 2016-050192 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Steefel, Carl I AU - Trebotich, D AU - Molins, S AU - Maxwell, R AU - Beisman, J AU - Moulton, D AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 2978 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - scale factor KW - hydrology KW - high-resolution methods KW - Brinkman formulations KW - terrestrial environment KW - Darcy's law KW - biochemistry KW - surface water KW - data processing KW - watersheds KW - fluid flow KW - ecosystems KW - porosity KW - geochemical cycle KW - models KW - computer programs KW - physical properties KW - transport KW - Navier-Stokes equations KW - microscope methods KW - drainage basins KW - reactive transport KW - spectroscopy KW - 21:Hydrogeology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797532241?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Multiple+scale+%28and+multi-scale%29+reactive+transport+modeling+of+terrestrial+systems&rft.au=Steefel%2C+Carl+I%3BTrebotich%2C+D%3BMolins%2C+S%3BMaxwell%2C+R%3BBeisman%2C+J%3BMoulton%2C+D%3BAnonymous&rft.aulast=Steefel&rft.aufirst=Carl&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=2978&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/2978.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-06-17 N1 - SubjectsTermNotLitGenreText - biochemistry; Brinkman formulations; computer programs; Darcy's law; data processing; drainage basins; ecosystems; fluid flow; geochemical cycle; high-resolution methods; hydrology; microscope methods; models; Navier-Stokes equations; physical properties; porosity; reactive transport; scale factor; spectroscopy; surface water; terrestrial environment; transport; watersheds ER - TY - JOUR T1 - High lithium in Kimberley and Pahrump outcrops; Gale Crater, Mars AN - 1793207803; 2016-048579 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Forni, O AU - Le Deit, L AU - Vaniman, D T AU - Mangold, N AU - Blaney, D L AU - Clegg, S M AU - Cousin, A AU - Gasnault, O AU - Maurice, S AU - Newsom, H E AU - Sautter, V AU - Toplis, M T AU - Wiens, R C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 932 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - silicates KW - magnesium KW - Pahrump Series KW - Kimberley KW - halogens KW - Mars KW - Gale Crater KW - emission spectra KW - mica group KW - fluorine KW - Curiosity Rover KW - LIBS spectra KW - spectra KW - geochemistry KW - chromium KW - alkaline earth metals KW - lithium KW - alkali metals KW - terrestrial planets KW - planets KW - metals KW - Mars Science Laboratory KW - sheet silicates KW - facies KW - 02C:Geochemistry of rocks, soils, and sediments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207803?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=High+lithium+in+Kimberley+and+Pahrump+outcrops%3B+Gale+Crater%2C+Mars&rft.au=Forni%2C+O%3BLe+Deit%2C+L%3BVaniman%2C+D+T%3BMangold%2C+N%3BBlaney%2C+D+L%3BClegg%2C+S+M%3BCousin%2C+A%3BGasnault%2C+O%3BMaurice%2C+S%3BNewsom%2C+H+E%3BSautter%2C+V%3BToplis%2C+M+T%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Forni&rft.aufirst=O&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=932&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/932.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt conference 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 9 N1 - Last updated - 2016-08-18 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; chromium; Curiosity Rover; emission spectra; facies; fluorine; Gale Crater; geochemistry; halogens; Kimberley; LIBS spectra; lithium; magnesium; Mars; Mars Science Laboratory; metals; mica group; Pahrump Series; planets; sheet silicates; silicates; spectra; terrestrial planets ER - TY - JOUR T1 - Brackish and saline groundwater in New Mexico AN - 1793204696; 2016-046198 JF - New Mexico Earth Matters AU - Graham, Jeri Sullivan Y1 - 2015 PY - 2015 DA - 2015 SP - 1 EP - 4 PB - New Mexico Tech, New Mexico Bureau of Geology and Mineral Resources, Socorro, NM VL - 15 IS - 2 SN - 2152-341X, 2152-341X KW - United States KW - technology KW - effects KW - New Mexico KW - salinity KW - salt water KW - ground water KW - drought KW - brackish water KW - desalinization KW - water treatment KW - water resources KW - geochemistry KW - demand KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793204696?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=New+Mexico+Earth+Matters&rft.atitle=Brackish+and+saline+groundwater+in+New+Mexico&rft.au=Graham%2C+Jeri+Sullivan&rft.aulast=Graham&rft.aufirst=Jeri&rft.date=2015-01-01&rft.volume=15&rft.issue=2&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=New+Mexico+Earth+Matters&rft.issn=2152341X&rft_id=info:doi/ L2 - https://geoinfo.nmt.edu/publications/periodicals/earthmatters/home.cfm LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - NM N1 - Document feature - illus. incl. geol. sketch map N1 - Last updated - 2016-06-02 N1 - SubjectsTermNotLitGenreText - brackish water; demand; desalinization; drought; effects; geochemistry; ground water; New Mexico; salinity; salt water; technology; United States; water resources; water treatment ER - TY - JOUR T1 - Patterns of moisture source and climate variability in the Southeastern United States; a four-century seasonally resolved tree-ring oxygen-isotope record AN - 1789754646; 2016-040003 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Labotka, D M AU - Grissino-Mayer, H D AU - Mora, C I AU - Johnson, E J AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 1739 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - United States KW - oxygen KW - isotopes KW - moisture KW - polysaccharides KW - paleoclimatology KW - Holocene KW - stable isotopes KW - Cenozoic KW - El Nino Southern Oscillation KW - oscillations KW - carbohydrates KW - Southeastern U.S. KW - Atlantic Multidecadal Oscillation KW - patterns KW - Quaternary KW - paleohydrology KW - isotope ratios KW - Eastern U.S. KW - O-18/O-16 KW - Pacific Decadal Oscillation KW - fluctuations KW - organic compounds KW - cellulose KW - tree rings KW - periodicity KW - seasonal variations KW - reconstruction KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789754646?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Patterns+of+moisture+source+and+climate+variability+in+the+Southeastern+United+States%3B+a+four-century+seasonally+resolved+tree-ring+oxygen-isotope+record&rft.au=Labotka%2C+D+M%3BGrissino-Mayer%2C+H+D%3BMora%2C+C+I%3BJohnson%2C+E+J%3BAnonymous&rft.aulast=Labotka&rft.aufirst=D&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=1739&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/1739.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-05-19 N1 - SubjectsTermNotLitGenreText - Atlantic Multidecadal Oscillation; carbohydrates; cellulose; Cenozoic; Eastern U.S.; El Nino Southern Oscillation; fluctuations; Holocene; isotope ratios; isotopes; moisture; O-18/O-16; organic compounds; oscillations; oxygen; Pacific Decadal Oscillation; paleoclimatology; paleohydrology; patterns; periodicity; polysaccharides; Quaternary; reconstruction; seasonal variations; Southeastern U.S.; stable isotopes; tree rings; United States ER - TY - JOUR T1 - Designing an Ergonomically Sound Glovebox Glove AN - 1786163193; PQ0002503106 AB - The 3D SolidWorks model formed the basis of the new glove mold and will be used for development of the new GB glove by the manufacturers. The new design received a LANL patent (Patent Attorney docket No: LANS 36USD1 "Protective Glove"), one of 20 highest patents awarded by the Richard P. Feynman Center for Innovation. The new glovebox glove will decrease strain and physical stress felt on the upper extremities of glovebox workers, as well as material strain on the glove itself. The ergonomically correct design will diminish the risk of injury, improve worker comfort and productivity, and reduce exposure concerns. JF - Transactions of the American Nuclear Society AU - Lawton, Cindy AU - Land, Whitney AU - Oka, Jude AD - Los Alamos National Laboratory, M.S.E-500, Los Alamos, NM, 87545 cindyl@lanl.gov Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 492 EP - 494 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Physical stress KW - Three dimensional models KW - Patents KW - Molds KW - Gloves KW - Gloveboxes KW - Strain KW - Productivity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786163193?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Designing+an+Ergonomically+Sound+Glovebox+Glove&rft.au=Lawton%2C+Cindy%3BLand%2C+Whitney%3BOka%2C+Jude&rft.aulast=Lawton&rft.aufirst=Cindy&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=492&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 ER - TY - JOUR T1 - Neutron Noise Measurements on HEU Foils Moderated by Lucite AN - 1786162343; PQ0002503102 AB - The class foils experiment on the Planet critical assembly machine at the National Criticality Experiments Research Center (NCERC) is often used for training purposes [1]. The class foils experiment, shown in Fig. 1, consists of 9.0x9.0x0.003 inch HEU metal foils moderated and reflected by Lucite. Measurements were performed in July 2013 with neutron detectors consisting of He-3 tubes embedded in polyethylene near the Planet assembly. Nine measured configurations will be presented in this work: eight are subcritical configurations and one is above delayed critical. The neutron data produced were used to approximate the multiplication of each measured configuration. JF - Transactions of the American Nuclear Society AU - Hutchinson, J AU - Smith-Nelson, M AU - Sood, A AU - Sanchez, R AU - Hayes, D AU - Cutler, T AU - Chapelle, A AU - Casoli, P AD - Los Alamos National Laboratory, MS-B228, Los Alamos, New Mexico 87545 Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 471 EP - 474 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Lucite KW - Planets KW - Neutron detectors KW - Assembly KW - Tubes KW - Approximation KW - Foils KW - Noise measurement UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786162343?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Neutron+Noise+Measurements+on+HEU+Foils+Moderated+by+Lucite&rft.au=Hutchinson%2C+J%3BSmith-Nelson%2C+M%3BSood%2C+A%3BSanchez%2C+R%3BHayes%2C+D%3BCutler%2C+T%3BChapelle%2C+A%3BCasoli%2C+P&rft.aulast=Hutchinson&rft.aufirst=J&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=471&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 ER - TY - JOUR T1 - Dynamic System Simulation of Fissile Solution Systems AN - 1786162083; PQ0002502986 AB - The use of fissile solutions of uranium, either in an aqueous homogeneous reactor (AHR) or in a subcritical accelerator-driven system, is considered viable technology for the production of the important medical isotope Mo-99. Although AHRs have been operated for seventy years in a large variety of configurations, little has been understood and published regarding the reactor physics of these systems. Reported here are the results of applying time-dependent system simulation techniques to understand the performance of these systems. Specific models have been prepared for historic reactors in all modes of operation, including steady-state and off-normal reactivity excursions. Model estimates are compared to experimental data for these and similar AHR. The underlying physical model has been rendered as a design tool in MS Visual Studio and a simulation/training system in NI LabVIEW. JF - Transactions of the American Nuclear Society AU - Day, Christy M AU - Klein, Steven K AD - Los Alamos National Laboratory: Los Alamos, NM, 87545 dayc@lanl.gov Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 9 EP - 12 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear power generation KW - Nuclear reactors KW - Mathematical models KW - Systems simulation KW - Dynamical systems KW - Nuclear reactor components KW - Dynamics KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786162083?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Dynamic+System+Simulation+of+Fissile+Solution+Systems&rft.au=Day%2C+Christy+M%3BKlein%2C+Steven+K&rft.aulast=Day&rft.aufirst=Christy&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=9&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 ER - TY - JOUR T1 - MCNP6 Optimization and Testing for Criticality Safety Calculations AN - 1786161981; PQ0002503100 AB - The performance gains reported in this work demonstrate that the initial efforts to improve the performance and structural foundation of MCNP6 have succeeded. Many more such improvements are planned over the next few years to address parallel threading efficiency; cache and memory access improvements; new techniques for performing and storing tally information; improved coding clarity, robustness, and compliance with standards; parallel MPI improvements for clusters; etc. A faster Monte Carlo code has direct benefits to the overall quality of criticality safety analyses, by enabling analysts to run more problems and reduce the Monte Carlo statistical uncertainty. The highest priority for development, however, goes to maintaining and improving the physics accuracy of the code so that accurate and reliable results are produced. JF - Transactions of the American Nuclear Society AU - Brown, Forrest B AD - Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM, 87544 Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 464 EP - 466 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Coding KW - Monte Carlo methods KW - Clusters KW - Nuclear safety KW - Computing time KW - Priorities KW - Computational efficiency KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786161981?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=MCNP6+Optimization+and+Testing+for+Criticality+Safety+Calculations&rft.au=Brown%2C+Forrest+B&rft.aulast=Brown&rft.aufirst=Forrest&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=464&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 ER - TY - JOUR T1 - Early Stages of Cement Hydration in Brine Containing MgO: Preliminary Data on pH Changes and Implications for Actinide Chemistry AN - 1786161688; PQ0002503027 AB - The preliminary data presented herein provide some early information on the combined hydration of cement and MgO in concentrated brines. Despite an excess of MgO (~ 5 times the amount of cement), the hydration of cement led the pH of the solutions to higher values (0.3 to 2.6 pH-unit increase). The presence of MgO in the investigated systems had a noticeable effect on the amount of solid precipitation (much more important when MgO is present) and on the amount of solution (much lower than the initial amount). Data on the elemental compositions of the solutions and the precipitated solids will help to define the major chemical mechanisms involved in these experiments. Should these saturated systems contain actinides, it is expected that actinides would predominantly be hydroxide species, because of the increase of pH towards very basic values. Most of the actinide hydroxides will then precipitate over time along with brucite and the cement paste, and therefore, the solubility of actinides in these systems will be extremely low. Future experiments will demonstrate these assumptions. JF - Transactions of the American Nuclear Society AU - Lucchini, J F AU - Richmann, M K AU - Swanson, J J AU - Reed, D T AD - Los Alamos National Laboratory, ADEP-RSO, 115 N. Main, Carlsbad, NM 88220 USA lucchini@lanl.gov Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 176 EP - 177 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Ceramic Abstracts/World Ceramics Abstracts (WC); Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Hydration KW - Salt water KW - Cements KW - Magnesium oxide KW - Precipitation KW - Hydroxides KW - pH KW - Actinides UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786161688?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Early+Stages+of+Cement+Hydration+in+Brine+Containing+MgO%3A+Preliminary+Data+on+pH+Changes+and+Implications+for+Actinide+Chemistry&rft.au=Lucchini%2C+J+F%3BRichmann%2C+M+K%3BSwanson%2C+J+J%3BReed%2C+D+T&rft.aulast=Lucchini&rft.aufirst=J&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=176&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 ER - TY - JOUR T1 - Towards Understanding FCCI: Modeling Cerium Solid Transport in Metal Fuels AN - 1786161256; PQ0002503049 AB - In metal fuels, clad deterioration spurred by fuel-cladding chemical interactions (FCCI) are the result of fuel swelling and fission product migration and affect fuel performance and lifetime. Modeling fission product migration is necessary to aid efforts to deter FCCI while maintaining or enhancing fuel performance. Elements near the Lanthanide series are particularly abundant cumulative-yield fission products and will accumulate at the most rapid rates during burnup. Furthermore, lanthanide group elements are known to cluster at the fuel rod surface. Given that some data for cerium diffusion in U-Zr solid solutions exists [1,2], and that cerium is one of the most abundant fission products [3], it makes an excellent candidate for implementation into the 3D fuel performance analysis code, BISON [4] as a test case for studying the role of Lanthanide diffusion in FCCI. JF - Transactions of the American Nuclear Society AU - Arnold, C W AU - Galloway, Jack AU - Unal, Cetin AD - NEN-5, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545 arnold@lanl.gov Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 269 EP - 270 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Fission products KW - Fuels KW - Cerium KW - Lanthanides KW - Diffusion KW - Swelling KW - Metal fuels KW - Migration UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786161256?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Towards+Understanding+FCCI%3A+Modeling+Cerium+Solid+Transport+in+Metal+Fuels&rft.au=Arnold%2C+C+W%3BGalloway%2C+Jack%3BUnal%2C+Cetin&rft.aulast=Arnold&rft.aufirst=C&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=269&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 ER - TY - JOUR T1 - Production of Heavy Clusters with an Expanded Coalescence Model in CEM AN - 1786161040; PQ0002503125 AB - The production of heavy clusters in nuclear reactions is important in a wide variety of applications: radiation shielding, space engineering and design, medical physics, accelerator design, and more. According to the Cascade Exciton Model (CEM) [1, 2], there are three ways high-energy heavy clusters can be produced. The first way is via coalescence of nucleons produced in the IntraNuclear Cascade (INC). The second way is via the preequilibrium model. The last way is via Fermi breakup. Previous work in CEM examines the impact of expansions of the preequilibrium model and Fermi breakup model on heavy cluster production [3-7]. JF - Transactions of the American Nuclear Society AU - Kerby, Leslie M AU - Mashnik, Stepan G AD - Los Alamos National Laboratory, Los Alamos, New Mexico USA Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 577 EP - 580 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear reactions KW - Coalescing KW - Clusters KW - Breakup KW - Coalescence KW - Accelerators KW - Cascades KW - Nucleons UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786161040?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Production+of+Heavy+Clusters+with+an+Expanded+Coalescence+Model+in+CEM&rft.au=Kerby%2C+Leslie+M%3BMashnik%2C+Stepan+G&rft.aulast=Kerby&rft.aufirst=Leslie&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=577&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 ER - TY - JOUR T1 - CHARACTERIZATION OF THE NEUTRON DETECTABILITY OF HIGHLY ENRICHED URANIUM AN - 1786160854; PQ0002503126 AB - The detectability of special nuclear material at ports and borders is of paramount importance to the mission of the Department of Homeland Security's (DHS) Domestic Nuclear Detection Office (DNDO). One of DNDO's primary strategic objectives is to characterize detector system performance before deployment. In the effort to support this mission, the latest version of MCNP [1] has been used to perform detectability studies of highly enriched uranium (HEU). This concept of operations (CONOPS) approach is a crucial tool in the design of any detector system. The methods employed here are a useful guideline to any user wishing to accurately model and characterize a detector system application. JF - Transactions of the American Nuclear Society AU - McMath, G E AU - Wilcox, T A AU - McKinney, G W AD - Los Alamos National Laboratory, P.O. Box 1663 MS P939, Los Alamos, NM, 87545 Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 581 EP - 584 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Borders KW - Missions KW - Uranium KW - Detectors KW - Guidelines KW - Domestic KW - Enrichment KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786160854?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=CHARACTERIZATION+OF+THE+NEUTRON+DETECTABILITY+OF+HIGHLY+ENRICHED+URANIUM&rft.au=McMath%2C+G+E%3BWilcox%2C+T+A%3BMcKinney%2C+G+W&rft.aulast=McMath&rft.aufirst=G&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=581&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 ER - TY - JOUR T1 - Tungsten-Reflected Subcritical Measurements AN - 1786160809; PQ0002503099 AB - In September 2012, eight subcritical configurations were measured with the clad alpha -phase plutonium sphere known as the Beryllium-Reflected Plutonium (BeRP) ball at the National Criticality Experiments Research Center (NCERC). The configurations had varying tungsten thicknesses including: 0 (bare), 0.5, 1.0, 1.5, 2.0, 2.5, 2.75, and 3.0 inches. Measurements were conducted to provide subcritical benchmark data. These measurements will be submitted for inclusion in a future version of the International Handbook of Evaluated Criticality Safety Benchmark Experiments (ICSBEP). JF - Transactions of the American Nuclear Society AU - Hutchinson, J AU - Richard, B AU - Cutler, T AU - Sood, A AU - Smith-Nelson, M AD - Los Alamos National Laboratory, MS-B228, Los Alamos, New Mexico 87545 Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 460 EP - 463 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Handbooks KW - Plutonium KW - Cladding KW - Nuclear safety KW - Inclusions KW - Benchmarking KW - Tungsten KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786160809?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Tungsten-Reflected+Subcritical+Measurements&rft.au=Hutchinson%2C+J%3BRichard%2C+B%3BCutler%2C+T%3BSood%2C+A%3BSmith-Nelson%2C+M&rft.aulast=Hutchinson&rft.aufirst=J&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=460&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 ER - TY - JOUR T1 - Physical and material properties of Gale Crater sand deposits; from Rocknest to Pahrump AN - 1780803624; 2016-033847 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Fraeman, A A AU - Arvidson, R E AU - Ehlmann, B L AU - Bridges, N T AU - Clark, B AU - Cousin, A AU - Des Marais, D AU - Gellert, R AU - Johnson, J R AU - Lapotre, M G A AU - Schroeder, S AU - Stein, N T AU - Sullivan, R AU - Wellington, D AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1682 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - eolian features KW - Alpha Particle X-ray Spectrometer KW - Mars KW - elastic constants KW - ripple marks KW - Gale Crater KW - bedding plane irregularities KW - Hidden Valley KW - major elements KW - Pahrump KW - Curiosity Rover KW - sediments KW - ChemCam KW - HiRISE KW - sedimentary structures KW - sand KW - CRISM KW - clastic sediments KW - Dingo Gap KW - Mars Reconnaissance Orbiter KW - Rocknest KW - bedforms KW - terrestrial planets KW - compaction KW - planets KW - physical properties KW - Mars Science Laboratory KW - shear modulus KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780803624?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Physical+and+material+properties+of+Gale+Crater+sand+deposits%3B+from+Rocknest+to+Pahrump&rft.au=Fraeman%2C+A+A%3BArvidson%2C+R+E%3BEhlmann%2C+B+L%3BBridges%2C+N+T%3BClark%2C+B%3BCousin%2C+A%3BDes+Marais%2C+D%3BGellert%2C+R%3BJohnson%2C+J+R%3BLapotre%2C+M+G+A%3BSchroeder%2C+S%3BStein%2C+N+T%3BSullivan%2C+R%3BWellington%2C+D%3BAnonymous&rft.aulast=Fraeman&rft.aufirst=A&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1682.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 9 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Nov. 2, 2015 N1 - Last updated - 2016-08-18 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Alpha Particle X-ray Spectrometer; bedding plane irregularities; bedforms; ChemCam; clastic sediments; compaction; CRISM; Curiosity Rover; Dingo Gap; elastic constants; eolian features; Gale Crater; Hidden Valley; HiRISE; major elements; Mars; Mars Reconnaissance Orbiter; Mars Science Laboratory; Pahrump; physical properties; planets; ripple marks; Rocknest; sand; sedimentary structures; sediments; shear modulus; terrestrial planets ER - TY - JOUR T1 - The role of zeolite phase transformations in nuclear repository engineered barrier systems AN - 1780802563; 2016-032076 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Caporuscio, F A AU - Cheshire, M AU - Jove-Colon, C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 463 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - silicates KW - alteration KW - sorption KW - isotopes KW - stability KW - solution KW - radioactive waste KW - illitization KW - ground water KW - sedimentary rocks KW - radioactive isotopes KW - silica KW - clinoptilolite KW - zeolite group KW - framework silicates KW - disposal barriers KW - P-T conditions KW - montmorillonite KW - experimental studies KW - bentonite KW - cementation KW - smectite KW - clay minerals KW - diagenesis KW - brines KW - sheet silicates KW - analcime KW - waste disposal KW - clastic rocks KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780802563?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=The+role+of+zeolite+phase+transformations+in+nuclear+repository+engineered+barrier+systems&rft.au=Caporuscio%2C+F+A%3BCheshire%2C+M%3BJove-Colon%2C+C%3BAnonymous&rft.aulast=Caporuscio&rft.aufirst=F&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=463&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/463.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-04-14 N1 - SubjectsTermNotLitGenreText - alteration; analcime; bentonite; brines; cementation; clastic rocks; clay minerals; clinoptilolite; diagenesis; disposal barriers; experimental studies; framework silicates; ground water; illitization; isotopes; montmorillonite; P-T conditions; radioactive isotopes; radioactive waste; sedimentary rocks; sheet silicates; silica; silicates; smectite; solution; sorption; stability; waste disposal; zeolite group ER - TY - JOUR T1 - Diversity of igneous rocks at Gale Crater, Mars AN - 1777473246; 2016-027901 AB - Curiosity rover has observed a total of 67 igneous rocks up to sol 800. We first identified these rocks by textural analyses from the MastCam and ChemCam images. The objective of this study is to show that Early Mars presents an interesting diversity of igneous products, some of them being evolved and not observed with previous in situ missions. First, the rocks were classified as effusive or intrusive based on textural analyses. Among the effusive rocks, two groups show an aphanitic texture: one with dark rocks while the other one contains leucocrate rocks. These leucocrate aphanitic rocks are characterized by the presence of potassic feldspars. These rocks are also enriched on Ba compared to other igneous targets, as well as in Rb ( approximately 110 ppm median). Some points from these rocks have sampled a mixture with Ti-oxide grains. We also observed porphyritic rocks with cm-size light-toned minerals that correspond mainly to oligoclase/andesine feldspars. As the laser sampled both the matrix and the light-toned minerals, a nice mixing trend is observed between these feldspars and more primitive material. The two groups of intrusive rocks are either dark and fine-grained with similar proportions of dark and light-toned minerals, or coarse-grained dominated by light-toned minerals. These coarse-grained leucocrate rocks are enriched in andesine/oligoclase with some mixture with a Si-rich component. Most of the igneous rocks have been observed as float rocks. Some 'ambiguous' textures are also reported. These rocks seem to be igneous from their texture, this one is different from the five distinctive groups and also these rocks present a different chemistry. The combination of textural and whole-rock analysis revealed a nice alkali-trend up to trachytes, observed for the first time on Mars. This suggests a low-degree of partial melting in the Martian mantle at relatively low pressure. Moreover, the light-toned coarse-grained intrusive rocks correspond to diorite/granodiorite with normative quartz, suggesting that Si-rich igneous rocks may constitute a significant portion of the martian crust. We have shown that felsic rocks seem to have been transported from the northern part of the crater rim whereas the dark aphanitic ones are observed at the end of the traverse, probably coming from another source. JF - Abstracts with Programs - Geological Society of America AU - Cousin, Agnes AU - Sautter, Violaine AU - Mangold, N AU - Forni, Olivier AU - Toplis, Michael AU - Pinet, Patrick AU - Payre, Valerie AU - Gasnault, Olivier AU - Newsom, Horton E AU - Wiens, R C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 356 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777473246?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Diversity+of+igneous+rocks+at+Gale+Crater%2C+Mars&rft.au=Cousin%2C+Agnes%3BSautter%2C+Violaine%3BMangold%2C+N%3BForni%2C+Olivier%3BToplis%2C+Michael%3BPinet%2C+Patrick%3BPayre%2C+Valerie%3BGasnault%2C+Olivier%3BNewsom%2C+Horton+E%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Cousin&rft.aufirst=Agnes&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=356&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-04-01 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Minimum Critical Mass of Heterogeneous Moderated Plutonium Metal Systems AN - 1773849430; PQ0002503097 AB - In criticality safety analysis it is important to recognize the significant differences in reactivity achieved when material transitions from the solid to solution regime. However, the intermediate area of mixed heterogeneous systems (i.e. collections of small pieces) has not been well characterized. To that end, a study is underway to determine the effect of fissile material piece size/shape on minimum critical mass of a system. JF - Transactions of the American Nuclear Society AU - Wysong, A R AU - Glazener, N AU - Krentz-Wee, R E AU - Salazar, A L AD - Los Alamos National Laboratory, P.O. Box 1663, E585, Los Alamos, NM 87545, wysong@lanl.gov Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 453 EP - 455 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Health & Safety Science Abstracts KW - Metals KW - Plutonium KW - Safety KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773849430?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Minimum+Critical+Mass+of+Heterogeneous+Moderated+Plutonium+Metal+Systems&rft.au=Wysong%2C+A+R%3BGlazener%2C+N%3BKrentz-Wee%2C+R+E%3BSalazar%2C+A+L&rft.aulast=Wysong&rft.aufirst=A&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=453&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Metals; Plutonium; Safety ER - TY - JOUR T1 - New Directions in Source Recoveries by OSRP at LANL AN - 1773830457; PQ0002503042 AB - For over 10 years the Off-Site Source Recovery Project (OSRP) at Los Alamos National Laboratory (LANL) has been recognized as a successful and unique program in the nation and worldwide, with a primary mission to collect and dispose of radioactive sealed sources that present a threat to national security and public safety. OSRP is operating within NNSA Office of Global Material Security and is managed at LANL. In the past year, OSRP achieved a major milestone by recovering more than one million curies of radioactive material since the project was established in 1999. OSRP has recovered and secured more than 33,000 sources from more than 1,100 locations throughout US and worldwide. JF - Transactions of the American Nuclear Society AU - Witkowski, Ioana AU - Nettleton, Anthony AU - Feldman, Alex AD - NEN-3, Los Alamos National Laboratory, Los Alamos, NM 87545, ioana@lanl.gov Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 235 EP - 237 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Health & Safety Science Abstracts KW - Security KW - Safety KW - Radioactive materials KW - USA, New Mexico, Los Alamos KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773830457?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=New+Directions+in+Source+Recoveries+by+OSRP+at+LANL&rft.au=Witkowski%2C+Ioana%3BNettleton%2C+Anthony%3BFeldman%2C+Alex&rft.aulast=Witkowski&rft.aufirst=Ioana&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=235&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Security; Radioactive materials; Safety; USA, New Mexico, Los Alamos ER - TY - JOUR T1 - Mineralogical study of sediments in chromium-contaminated plume; implication for natural attenuation AN - 1773799788; 2016-025274 AB - Options to remediate a legacy waste plume of hexavalent chromium (Cr (super 6+) ) in the Los Alamos National Laboratory (LANL) regional aquifer include actively engineered remediation and passive natural attenuation. Natural attenuation studies seek to understand the mechanism, capacity and rate of reduction for sediments to convert the toxic and carcinogenic Cr (super 6+) to the immobile, less harmful Cr (super 3+) . Here we report a site-specific mineralogy of the two geological units in the regional aquifer. Targeted sonic drilling in the plume area was initiated in 2014 to document lateral and vertical variabilities of contaminant concentration in the aquifer. These well-preserved samples were examined with XRD to determine specific mineralogical composition. Particular attention is given to clays, iron-bearing minerals and amorphous (volcanic glass) materials because of their potential to reduce Cr (super 6+) . LANL is located on the Pajarito Plateau at the western edge of the Espanola basin. The older unit comprising the aquifer is the Miocene Pumiceous. This series of reworked, buff pumice beds have sub-units which correlate to the Peralta Rhyolite (6.9 Ma). The younger unit is the Plio-Pleistocene Puye formation, a heterogeneous volcanoclastic fanglomerate sourced predominantly from dacitic flows on the western side of the Pajarito Plateau. Preliminary mineralogical assessment of the Puye formation based on outcrop and borehole samples show the following: combined SiO (sub 2) ; phases 1.3-25.2 wt.%, feldspars 31.5-54.3 wt.%, magnetite 1.03-1.98 wt.%, amorphous 9.1-43.9 wt.% and smectite 0-33.7 wt.%. Ongoing mineralogy from sonic cores is consistent with these findings, with the addition of muscovite. Continued study of sediment constituents with potential to attenuate will help inform the optimal procedure for remediation of the Cr (super +) plume. JF - Abstracts with Programs - Geological Society of America AU - Beroff, Sara Estrella AU - WoldeGabriel, Giday AU - Musa, Dea AU - Ding, Mei AU - Kluk, Emily AU - Rearick, Michael AU - Perkins, George AU - Reimus, Paul W AU - Katzman, Danny AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 301 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773799788?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Mineralogical+study+of+sediments+in+chromium-contaminated+plume%3B+implication+for+natural+attenuation&rft.au=Beroff%2C+Sara+Estrella%3BWoldeGabriel%2C+Giday%3BMusa%2C+Dea%3BDing%2C+Mei%3BKluk%2C+Emily%3BRearick%2C+Michael%3BPerkins%2C+George%3BReimus%2C+Paul+W%3BKatzman%2C+Danny%3BAnonymous&rft.aulast=Beroff&rft.aufirst=Sara&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=301&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-03-17 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Quantification of salt anions using laser-induced breakdown spectroscopy AN - 1773798588; 2016-024575 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Anderson, D E AU - Ehlmann, B L AU - Clegg, S AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2724 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - halides KW - calcium chloride KW - laser-induced breakdown spectroscopy KW - halogens KW - data processing KW - Mars KW - calibration KW - emission spectra KW - laboratory studies KW - Curiosity Rover KW - chlorides KW - LIBS spectra KW - spectra KW - chemical composition KW - chlorine KW - ChemCam instrument KW - anions KW - sodium chloride KW - emission spectroscopy KW - terrestrial planets KW - planets KW - detection KW - natural analogs KW - Mars Science Laboratory KW - spectroscopy KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773798588?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Quantification+of+salt+anions+using+laser-induced+breakdown+spectroscopy&rft.au=Anderson%2C+D+E%3BEhlmann%2C+B+L%3BClegg%2C+S%3BAnonymous&rft.aulast=Anderson&rft.aufirst=D&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2724.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Accessed on Jan 6, 2016 N1 - Last updated - 2016-03-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - anions; calcium chloride; calibration; ChemCam instrument; chemical composition; chlorides; chlorine; Curiosity Rover; data processing; detection; emission spectra; emission spectroscopy; halides; halogens; laboratory studies; laser-induced breakdown spectroscopy; LIBS spectra; Mars; Mars Science Laboratory; natural analogs; planets; sodium chloride; spectra; spectroscopy; terrestrial planets ER - TY - JOUR T1 - Garden City; a complex vein system observed by the Curiosity Rover at Pahrump Hills, Gale Crater, Mars AN - 1769967170; 2016-018866 AB - Over the last 1000+ sols, the Mars Science Laboratory (MSL) Curiosity rover has observed a variety of diagenetic features, including nodules, raised ridges, dendritic/lenticular crystals, and veins. Veins, or mineral-filled fractures, have been the most ubiquitous diagenetic feature present in Gale crater rocks, and have been described in almost all stratigraphic units encountered by MSL. On sol 753, Curiosity entered the Pahrump Hills region, which represents the first outcrops associated with Lower Mount Sharp. Upon entering Pahrump, the nature of veins changed dramatically in both the number of generations, as well as their size, density, and complexity. We've observed a drastic change from the uniformly small, light-toned calcium sulfate veins seen at Yellowknife Bay and along Curiosity's traverse to what appears to be multiple generations of vein material, each with distinct textural and chemical signatures. Curiosity spent approximately 20 sols observing the vein rich outcrop named Garden City. Extensive Mastcam and MAHLI imaging was conducted across the outcrop. Additionally, Curiosity collected geochemical data on 17 ChemCam targets and 7 APXS targets, shedding light on the composition and provenance of vein fluids at Garden City. Veins at Garden City range from mm- to cm-scale and are dominated by light-toned mineral fill. Textures in these white veins vary over local distances and range from smooth and massive/homogeneous to pitted and rough. The largest veins are brecciated and in multiple locations entrain host rock and darker vein material within their matrix. At Garden City, grey-toned material is observed along fracture walls, and is commonly bisected by a later stage of calcium sulfate mineralization. An additional generation of dark-toned vein material occurs in the form of erosionally-resistant thin fins. These fins are oriented in 3-dimensions and are commonly observed in float. These three distinct vein generations (light-toned/white, dark-toned/grey, and thin fins) are interpreted to reflect separate diagenetic fluid events, and have implications in constraining the duration of liquid water and potential habitability on Mars. JF - Abstracts with Programs - Geological Society of America AU - Kronyak, R E AU - Kah, L C AU - Grotzinger, John P AU - Fisk, M R AU - Sumner, D Y AU - Nachon, M AU - Mangold, Nicolas AU - Blaney, D L AU - Rapin, W AU - Wiens, R C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 217 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769967170?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Garden+City%3B+a+complex+vein+system+observed+by+the+Curiosity+Rover+at+Pahrump+Hills%2C+Gale+Crater%2C+Mars&rft.au=Kronyak%2C+R+E%3BKah%2C+L+C%3BGrotzinger%2C+John+P%3BFisk%2C+M+R%3BSumner%2C+D+Y%3BNachon%2C+M%3BMangold%2C+Nicolas%3BBlaney%2C+D+L%3BRapin%2C+W%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Kronyak&rft.aufirst=R&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=217&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-03-03 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Regional context of soil and rock chemistry at Gale and Gusev Craters, Mars AN - 1769966984; 2016-020676 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Newsom, H E AU - Gordon, S AU - Jackson, R AU - Wiens, R C AU - Lanza, N AU - Cousin, A AU - Clegg, S AU - Sautter, V AU - Bridges, J AU - Mangold, N AU - Gasnault, O AU - Maurice, S AU - d'Uston, C AU - Berger, G AU - Forni, O AU - Lasue, J AU - Meslin, P Y AU - Clark, B AU - Anderson, R AU - Gellert, R AU - Schmidt, M AU - Berger, J AU - McLennan, S AU - Boynton, W AU - Fisk, M AU - Martin-Torres, F AU - Zorzano, M P AU - Karunatillake, S AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2284 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - calcium KW - Spirit Rover KW - Noachian KW - halogens KW - Mars KW - silicon KW - lithophile elements KW - iron KW - Gale Crater KW - Mars Exploration Rover KW - volatile elements KW - Curiosity Rover KW - gamma-ray spectra KW - spectra KW - mobility KW - geochemistry KW - chemical ratios KW - Gusev Crater KW - water KW - chlorine KW - alkaline earth metals KW - alkali metals KW - weathering KW - Mars Odyssey KW - terrestrial planets KW - planets KW - metals KW - sulfur trioxide KW - potassium KW - Mars Science Laboratory KW - aerosols KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769966984?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Regional+context+of+soil+and+rock+chemistry+at+Gale+and+Gusev+Craters%2C+Mars&rft.au=Newsom%2C+H+E%3BGordon%2C+S%3BJackson%2C+R%3BWiens%2C+R+C%3BLanza%2C+N%3BCousin%2C+A%3BClegg%2C+S%3BSautter%2C+V%3BBridges%2C+J%3BMangold%2C+N%3BGasnault%2C+O%3BMaurice%2C+S%3Bd%27Uston%2C+C%3BBerger%2C+G%3BForni%2C+O%3BLasue%2C+J%3BMeslin%2C+P+Y%3BClark%2C+B%3BAnderson%2C+R%3BGellert%2C+R%3BSchmidt%2C+M%3BBerger%2C+J%3BMcLennan%2C+S%3BBoynton%2C+W%3BFisk%2C+M%3BMartin-Torres%2C+F%3BZorzano%2C+M+P%3BKarunatillake%2C+S%3BAnonymous&rft.aulast=Newsom&rft.aufirst=H&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2284.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. incl. geol. sketch map N1 - SuppNotes - Accessed Oct. 27, 2015 N1 - Last updated - 2016-06-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - aerosols; alkali metals; alkaline earth metals; calcium; chemical ratios; chlorine; Curiosity Rover; Gale Crater; gamma-ray spectra; geochemistry; Gusev Crater; halogens; iron; lithophile elements; Mars; Mars Exploration Rover; Mars Odyssey; Mars Science Laboratory; metals; mobility; Noachian; planets; potassium; silicon; spectra; Spirit Rover; sulfur trioxide; terrestrial planets; volatile elements; water; weathering ER - TY - JOUR T1 - ChemCam passive reflectance spectroscopy of ferric sulfates and ferric oxides near the base of Mt. Sharp AN - 1769966482; 2016-020681 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Johnson, Jeff R AU - Wiens, R C AU - Maurice, S AU - Blaney, D AU - Gasnault, O AU - Cloutis, E AU - Le Mouelic, S AU - Bender, S AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1433 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - near-infrared spectra KW - iron oxides KW - optical spectra KW - Mars KW - emission spectra KW - hematite KW - Curiosity Rover KW - oxides KW - LIBS spectra KW - ChemCam KW - spectra KW - drilling KW - sulfates KW - oxyhydroxides KW - iron sulfates KW - Pahrump Hills KW - terrestrial planets KW - jarosite KW - hydroxides KW - planets KW - Mars Science Laboratory KW - reflectance KW - Mount Sharp KW - ferricopiapite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769966482?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=ChemCam+passive+reflectance+spectroscopy+of+ferric+sulfates+and+ferric+oxides+near+the+base+of+Mt.+Sharp&rft.au=Johnson%2C+Jeff+R%3BWiens%2C+R+C%3BMaurice%2C+S%3BBlaney%2C+D%3BGasnault%2C+O%3BCloutis%2C+E%3BLe+Mouelic%2C+S%3BBender%2C+S%3BAnonymous&rft.aulast=Johnson&rft.aufirst=Jeff&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/1433.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Oct. 28, 2015 N1 - Last updated - 2016-03-03 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - ChemCam; Curiosity Rover; drilling; emission spectra; ferricopiapite; hematite; hydroxides; iron oxides; iron sulfates; jarosite; LIBS spectra; Mars; Mars Science Laboratory; Mount Sharp; near-infrared spectra; optical spectra; oxides; oxyhydroxides; Pahrump Hills; planets; reflectance; spectra; sulfates; terrestrial planets ER - TY - JOUR T1 - Structure and stability of uranium containing iron garnets AN - 1769966329; 2016-021096 AB - Safe disposal of highly radioactive wastes from civilian nuclear reactors is a daunting challenge for sustained nuclear energy growth and associated environmental remediation. Use of crystalline garnets as waste forms to immobilize actinide radionuclides from nuclear wastes appears to be advantageous. Previous studies show that large loadings of uranium (U), and its analogues such as cerium (Ce) and thorium (Th) can be incorporated in garnet host phases, which have good aqueous durability at natural conditions. In this study, we synthesized a series of U-bearing garnet phases, Ca (sub 3) U (sub x) Zr (sub 2-x) Fe (sub 3) O (sub 12) (x=0.5-0.7), as well as the Ca (sub 3) (Zr (sub 2) )SiFe (super 3+) (sub 2) O (sub 12) end-member for comparison. The oxidation states of U in these phases were examined by X-ray photoelectron spectroscopy and X-ray absorption spectroscopy. U was found in mixed pentavalent and hexavalent oxidation states in the phases with x=0.6 and 0.7. The oxidation state and coordination environment of Fe were investigated by (super 57) Fe-Mossbauer spectroscopy. Our results show that all the Fe cations in the U-substituted garnets are tetrahedrally coordinated Fe (super 3+) but in two different local environments. The enthalpies of formation of garnets from constituent oxides and elements were determined by high temperature oxide melt solution calorimetry. The thermodynamic analyses demonstrate that these substituted garnets can be stabilized under reducing conditions. Structural and thermodynamic analysis further provides explanations for the formation and stabilization of the natural uranium garnet elbrusite-(Zr), and supports the potential use of Ca (sub 3) UxZr (sub 2-x) Fe (sub 3) O (sub 12) phases as viable waste forms for U and other actinides. JF - Abstracts with Programs - Geological Society of America AU - Guo, Xiaofeng AU - Navrotsky, Alexandra AU - Kukkadapu, Ravi K AU - Engelhard, Mark AU - Lanzirotti, Antonio AU - Newville, Matt AU - Ilton, Eugene AU - Sutton, Stephen R AU - Xu, Hongwu AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 203 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769966329?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Structure+and+stability+of+uranium+containing+iron+garnets&rft.au=Guo%2C+Xiaofeng%3BNavrotsky%2C+Alexandra%3BKukkadapu%2C+Ravi+K%3BEngelhard%2C+Mark%3BLanzirotti%2C+Antonio%3BNewville%2C+Matt%3BIlton%2C+Eugene%3BSutton%2C+Stephen+R%3BXu%2C+Hongwu%3BAnonymous&rft.aulast=Guo&rft.aufirst=Xiaofeng&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=203&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-03-03 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Micromorphological interpretation of late Pleistocene to Holocene paleoenvironmental history of Anderson Pond, Tennessee, USA AN - 1765871222; 2016-014604 AB - Thin-section (micromorphological) analysis of samples from the upper 1.5 m of a core obtained in 2007 from Anderson Pond, Tennessee reveals a coherent 15,000 yr record of late Pleistocene to Holocene climate change supporting interpretations from previous pollen and charcoal records from the site, paleoclimate records from correlative floodplains, as well as a high-resolution speleothem record from Raccoon Mountain Cave, Tennessee. The Holocene record at Anderson Pond is highly condensed due to low sedimentation rates, episodes of erosion, and soil formation during subaerial exposure of sediments of this sinkhole lake. Legacy sediments recording Euro- and Native American(?) disturbance dominate the upper 60 cm of the core (<900 cal yr BP) and are characterized by mixed, darker-colored and coarser-grained deposits containing reworked soil aggregates and medium- to coarse detrital quartz sand grains, which sharply overlie finer-grained and lighter-colored, heavily rooted Middle and Early Holocene sediments. Middle Holocene sediments (73-89 cm) record extensive warm-dry subaerial soil conditions during the Middle Holocene Thermal Maximum (4200-8200 cal yr BP), manifested by birefringent illuviated clay lining root pores and lining ped faces, with partially dissolved siliceous sponge spicules and diatoms, and also contain the highest charcoal concentrations. Late Pleistocene sediments (100-150 cm) are very dark-colored and very organic-rich in thin-section, recording open-water conditions, and include abundant organic grains (fresh to partially decomposed plant tissues, pollen, spores, seeds) as well as "siliceous aggregate" grains at 121-148 cm (13,950-14,400 cal yr BP). These distinctive grains are medium- to coarse silt-sized and consist of very fine- to fine-silt-sized quartz grains cemented by amorphous silica; they are interpreted as recording fire processes and production of wood ash, and formed when loessal silt was admixed with biogenic silica in the ash. Although not commonly used in late Quaternary lacustrine paleoclimate studies, we advocate a multi-analytical approach involving use of thin sections, in addition to more standard methods which emphasize pollen and charcoal, because of enhanced resolution of depositional and pedogenic processes. JF - Abstracts with Programs - Geological Society of America AU - Driese, Steven G AU - Horn, Sally P AU - Ballard, Joanne P AU - Li, Zheng-Hua AU - Boehm, Mathew S AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 129 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765871222?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Micromorphological+interpretation+of+late+Pleistocene+to+Holocene+paleoenvironmental+history+of+Anderson+Pond%2C+Tennessee%2C+USA&rft.au=Driese%2C+Steven+G%3BHorn%2C+Sally+P%3BBallard%2C+Joanne+P%3BLi%2C+Zheng-Hua%3BBoehm%2C+Mathew+S%3BAnonymous&rft.aulast=Driese&rft.aufirst=Steven&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=129&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-02-18 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Models for compositional variations in the Murray Formation Mudstone, Gale Crater, Mars AN - 1765870506; 2016-014645 AB - The Murray formation, Gale crater, Mars is distinctive in containing elevated silica compositions relative to other Gale rocks exposed in outcrop. These high silica rocks are also marked by their fine grain size of <60-70 microns and mm-scale lamina. Lamination is characteristically parallel, with horizontal to gently inclined attitude, and absence of cross-stratification. Sediment-filled mudcracks (evidence of desiccation) are absent, as are outsized clasts, such as pyroclasts, impact ejecta blocks, or glacial dropstones. Early to late diagenetic textures are present including dendritic concretions, prismatic crystal pseudomorphs, and calcium sulfate-filled fractures. High silica rocks show repeating characteristic lamina thicknesses reminiscent of terrestrial lake sediments. Deposition is likely to have occurred in a pro-delta environment where clastic sediment was delivered as river plumes, and perhaps also as authigenic phases from lake waters. Chemical and mineralogical analyses indicate that the majority of Murray formation mudstones are composed of roughly equal proportions of clastic igneous minerals, and secondary phases (e.g., phyllosilicates), including amorphous mineraloids of probable secondary origin. The mudstones are sourced by incipiently weathered basalt, and are possibly cemented by Ca-Mg-sulfates and silica, the latter in the form of cristobalite or opal. Redox cycling is indicated by variable amounts of hematite, magnetite, and jarosite, and likely reflects dynamic primary lake water and/or diagenetic redox conditions. For a smaller number of samples silica contents reach values as high as approximately 70-85 wt%. The fine-scale lamination is not disrupted by post-depositional weathering or alteration processes. Hydrothermal and acid-sulfate weathering mechanisms are frequently invoked to explain the occurrence of siliceous rocks on Mars, and it is also possible that silica enrichment represent distal silicic volcanic ash or eroded silica-rich detritus. However, available sedimentological, geochemical, and mineralogic data may best support a fourth hypothesis: that silica enrichment occurred via chemical precipitation as sediment within a subaqueous lake setting, perhaps similar to terrestrial banded iron formation. JF - Abstracts with Programs - Geological Society of America AU - Grotzinger, John P AU - Hurowitz, Joel A AU - Blake, David AU - Fischer, Woodward W AU - Fraeman, Abigail A AU - Gellert, Ralf AU - McLennan, Scott M AU - Sumner, Dawn AU - Vaniman, David AU - Wiens, R C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 266 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765870506?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Models+for+compositional+variations+in+the+Murray+Formation+Mudstone%2C+Gale+Crater%2C+Mars&rft.au=Grotzinger%2C+John+P%3BHurowitz%2C+Joel+A%3BBlake%2C+David%3BFischer%2C+Woodward+W%3BFraeman%2C+Abigail+A%3BGellert%2C+Ralf%3BMcLennan%2C+Scott+M%3BSumner%2C+Dawn%3BVaniman%2C+David%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Grotzinger&rft.aufirst=John&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=266&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2015 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - PubXState - CO N1 - Last updated - 2016-02-18 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Lattice Boltzmann-based approaches for pore-scale reactive transport AN - 1756508581; 2016-005476 JF - Reviews in Mineralogy and Geochemistry AU - Yoon, Hongkyu AU - Kang, Qinjun AU - Valocchi, Albert J AU - Steefel (editor), Carl I AU - Emmanuel (editor), Simon AU - Anovitz (editor), Lawrence M Y1 - 2015 PY - 2015 DA - 2015 SP - 393 EP - 431 PB - Mineralogical Society of America and Geochemical Society, Washington, DC VL - 80 SN - 1529-6466, 1529-6466 KW - solute transport KW - numerical models KW - lattice KW - numerical analysis KW - equations KW - solution KW - porosity KW - ground water KW - theoretical studies KW - transport KW - precipitation KW - biofilms KW - multiphase flow KW - lattice Boltzmann method KW - reactive transport KW - fractals KW - 21:Hydrogeology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756508581?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reviews+in+Mineralogy+and+Geochemistry&rft.atitle=Lattice+Boltzmann-based+approaches+for+pore-scale+reactive+transport&rft.au=Yoon%2C+Hongkyu%3BKang%2C+Qinjun%3BValocchi%2C+Albert+J%3BSteefel+%28editor%29%2C+Carl+I%3BEmmanuel+%28editor%29%2C+Simon%3BAnovitz+%28editor%29%2C+Lawrence+M&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2015-01-01&rft.volume=80&rft.issue=&rft.spage=393&rft.isbn=&rft.btitle=&rft.title=Reviews+in+Mineralogy+and+Geochemistry&rft.issn=15296466&rft_id=info:doi/10.2138%2Frmg.2015.80.12 L2 - http://www.minsocam.org/MSA/RIM/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 209 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2016-05-19 N1 - CODEN - RMINDF N1 - SubjectsTermNotLitGenreText - biofilms; equations; fractals; ground water; lattice; lattice Boltzmann method; multiphase flow; numerical analysis; numerical models; porosity; precipitation; reactive transport; solute transport; solution; theoretical studies; transport DO - http://dx.doi.org/10.2138/rmg.2015.80.12 ER - TY - JOUR T1 - Blast beds at the rover sites on Mars AN - 1756505684; 2016-006680 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Burt, D M AU - Knauth, L P AU - Wohletz, K H AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract 2838 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - Martian crust KW - technology KW - Spirit Rover KW - Opportunity Rover KW - Mars KW - ground water KW - exploration KW - terrestrial planets KW - Mars Exploration Rover KW - planets KW - planar bedding structures KW - Curiosity Rover KW - Mars Science Laboratory KW - outcrops KW - sedimentary structures KW - instruments KW - Gusev Crater KW - crust KW - cross-bedding KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756505684?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Blast+beds+at+the+rover+sites+on+Mars&rft.au=Burt%2C+D+M%3BKnauth%2C+L+P%3BWohletz%2C+K+H%3BAnonymous&rft.aulast=Burt&rft.aufirst=D&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2838.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2016-01-14 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - cross-bedding; crust; Curiosity Rover; exploration; ground water; Gusev Crater; instruments; Mars; Mars Exploration Rover; Mars Science Laboratory; Martian crust; Opportunity Rover; outcrops; planar bedding structures; planets; sedimentary structures; Spirit Rover; technology; terrestrial planets ER - TY - JOUR T1 - Selenium isotope ratios as novel redox proxies to detect the onset of U(VI) reduction in groundwater AN - 1756505158; 2016-007065 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Basu, Anirban AU - Schilling, K AU - Brown, Shaun T AU - Johnson, Thomas M AU - Christensen, John N AU - DePaolo, D J AU - Reimus, P W AU - Heikoop, J AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 223 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - mineral deposits, genesis KW - isotope fractionation KW - selenium KW - isotopes KW - Se-82/Se-78 KW - roll-type deposits KW - ground water KW - radioactive isotopes KW - reduction KW - anions KW - isotope ratios KW - oxidation KW - solutes KW - measurement KW - aquifers KW - models KW - uranium ores KW - detection KW - sandstone-type deposits KW - precipitation KW - metals KW - metal ores KW - uranium KW - U-238/U-234 KW - actinides KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756505158?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Selenium+isotope+ratios+as+novel+redox+proxies+to+detect+the+onset+of+U%28VI%29+reduction+in+groundwater&rft.au=Basu%2C+Anirban%3BSchilling%2C+K%3BBrown%2C+Shaun+T%3BJohnson%2C+Thomas+M%3BChristensen%2C+John+N%3BDePaolo%2C+D+J%3BReimus%2C+P+W%3BHeikoop%2C+J%3BAnonymous&rft.aulast=Basu&rft.aufirst=Anirban&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=223&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/223.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-01-14 N1 - SubjectsTermNotLitGenreText - actinides; anions; aquifers; detection; ground water; isotope fractionation; isotope ratios; isotopes; measurement; metal ores; metals; mineral deposits, genesis; models; oxidation; precipitation; radioactive isotopes; reduction; roll-type deposits; sandstone-type deposits; Se-82/Se-78; selenium; solutes; U-238/U-234; uranium; uranium ores ER - TY - JOUR T1 - Hematite formation in Gale Crater AN - 1752579336; 2016-003360 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Bridges, J C AU - Schwenzer, S P AU - Leveille, R AU - Wiens, R C AU - McAdam, A AU - Conrad, P G AU - Kelley, S P AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1769 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - iron oxides KW - Mars KW - iron KW - temperature KW - Gale Crater KW - carbon dioxide KW - ferric iron KW - water-rock interaction KW - open systems KW - hematite KW - Curiosity Rover KW - relict materials KW - oxides KW - mobility KW - ChemCam instrument KW - secondary minerals KW - solubility KW - weathering KW - terrestrial planets KW - models KW - planets KW - Hematite Ridge KW - precipitation KW - metals KW - diagenesis KW - Mars Science Laboratory KW - carbonates KW - magnetite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752579336?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Hematite+formation+in+Gale+Crater&rft.au=Bridges%2C+J+C%3BSchwenzer%2C+S+P%3BLeveille%2C+R%3BWiens%2C+R+C%3BMcAdam%2C+A%3BConrad%2C+P+G%3BKelley%2C+S+P%3BAnonymous&rft.aulast=Bridges&rft.aufirst=J&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2015/pdf/1769.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Sept. 4, 2015 N1 - Last updated - 2016-05-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - carbon dioxide; carbonates; ChemCam instrument; Curiosity Rover; diagenesis; ferric iron; Gale Crater; hematite; Hematite Ridge; iron; iron oxides; magnetite; Mars; Mars Science Laboratory; metals; mobility; models; open systems; oxides; planets; precipitation; relict materials; secondary minerals; solubility; temperature; terrestrial planets; water-rock interaction; weathering ER - TY - JOUR T1 - Chemical evidence from Gujba for differentiation and evaporation/recondensation processes during the CB-impact event AN - 1752578791; 2016-003386 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Oulton, J AU - Humayun, M AU - Fedkin, A V AU - Grossman, L AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1590 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - silicates KW - stony meteorites KW - Gujba Meteorite KW - refractory materials KW - mass spectra KW - planetesimals KW - lithophile elements KW - cerium KW - meteorites KW - CB chondrites KW - major elements KW - volatile elements KW - spectra KW - rare earths KW - europium KW - heterogeneity KW - chondrites KW - chemical composition KW - condensation KW - differentiation KW - clasts KW - carbonaceous chondrites KW - impacts KW - ICP mass spectra KW - evaporation KW - metals KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578791?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Chemical+evidence+from+Gujba+for+differentiation+and+evaporation%2Frecondensation+processes+during+the+CB-impact+event&rft.au=Oulton%2C+J%3BHumayun%2C+M%3BFedkin%2C+A+V%3BGrossman%2C+L%3BAnonymous&rft.aulast=Oulton&rft.aufirst=J&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2015/pdf/1590.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 14 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Sept. 25, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - carbonaceous chondrites; CB chondrites; cerium; chemical composition; chondrites; clasts; condensation; differentiation; europium; evaporation; Gujba Meteorite; heterogeneity; ICP mass spectra; impacts; lithophile elements; major elements; mass spectra; metals; meteorites; planetesimals; rare earths; refractory materials; silicates; spectra; stony meteorites; volatile elements ER - TY - JOUR T1 - Igneous rock classification at Gale (Sols 13-800) AN - 1752578783; 2016-003349 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Cousin, Agnes AU - Sautter, Violaine AU - Mangold, N AU - Fabre, C AU - Forni, O AU - Rapin, W AU - Fisk, M R AU - Gasnault, O AU - Lanza, N AU - Lasue, J AU - Meslin, P Y AU - Newson, H E AU - Ollila, A AU - Payre, V AU - Wiens, R C AU - Maurice, S AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2452 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - trachyandesites KW - volcanic rocks KW - igneous rocks KW - mafic composition KW - Mars KW - melts KW - Gale Crater KW - emission spectra KW - impact melts KW - plutonic rocks KW - mineral composition KW - whole rock KW - diorites KW - trachytes KW - granodiorites KW - basalts KW - LIBS spectra KW - spectra KW - chemical composition KW - aphanitic texture KW - ChemCam instrument KW - independent component analysis KW - textures KW - statistical analysis KW - felsic composition KW - terrestrial planets KW - planets KW - porphyritic texture KW - classification KW - MastCam instrument KW - image analysis KW - basanite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578783?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Igneous+rock+classification+at+Gale+%28Sols+13-800%29&rft.au=Cousin%2C+Agnes%3BSautter%2C+Violaine%3BMangold%2C+N%3BFabre%2C+C%3BForni%2C+O%3BRapin%2C+W%3BFisk%2C+M+R%3BGasnault%2C+O%3BLanza%2C+N%3BLasue%2C+J%3BMeslin%2C+P+Y%3BNewson%2C+H+E%3BOllila%2C+A%3BPayre%2C+V%3BWiens%2C+R+C%3BMaurice%2C+S%3BAnonymous&rft.aulast=Cousin&rft.aufirst=Agnes&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2015/pdf/2452.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 13 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Sept. 1, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - aphanitic texture; basalts; basanite; ChemCam instrument; chemical composition; classification; diorites; emission spectra; felsic composition; Gale Crater; granodiorites; igneous rocks; image analysis; impact melts; independent component analysis; LIBS spectra; mafic composition; Mars; MastCam instrument; melts; mineral composition; planets; plutonic rocks; porphyritic texture; spectra; statistical analysis; terrestrial planets; textures; trachyandesites; trachytes; volcanic rocks; whole rock ER - TY - JOUR T1 - Granodiorite and an alkaline suite analysed by ChemCam at Gale Crater AN - 1752578731; 2016-003350 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Sautter, Violaine AU - Toplis, M J AU - Wiens, R C AU - Cousin, Agnes AU - Fabre, C AU - Gasnault, O AU - Maurice, S AU - Forni, O AU - Stolper, E M AU - Lasue, J AU - Ollila, A AU - Fisk, M R AU - Mangold, N AU - Meslin, P Y AU - Beck, P AU - Pinet, P AU - Le Deit, L AU - Rapin, W AU - Bridges, J C AU - Dyar, D AU - Wray, J J AU - Vaniman, D AU - Le Mouelic, S AU - Newson, H E AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1943 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - silicates KW - trachyandesites KW - volcanic rocks KW - Noachian KW - K-feldspar KW - igneous rocks KW - Mars KW - Gale Crater KW - emission spectra KW - plutonic rocks KW - whole rock KW - diorites KW - alkali feldspar KW - trachytes KW - granodiorites KW - Curiosity Rover KW - basalts KW - LIBS spectra KW - framework silicates KW - spectra KW - chemical composition KW - vesicular texture KW - ChemCam instrument KW - independent component analysis KW - textures KW - mesostasis KW - grain size KW - statistical analysis KW - felsic composition KW - terrestrial planets KW - planets KW - porphyritic texture KW - classification KW - Mars Science Laboratory KW - MastCam instrument KW - feldspar group KW - phenocrysts KW - image analysis KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578731?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Granodiorite+and+an+alkaline+suite+analysed+by+ChemCam+at+Gale+Crater&rft.au=Sautter%2C+Violaine%3BToplis%2C+M+J%3BWiens%2C+R+C%3BCousin%2C+Agnes%3BFabre%2C+C%3BGasnault%2C+O%3BMaurice%2C+S%3BForni%2C+O%3BStolper%2C+E+M%3BLasue%2C+J%3BOllila%2C+A%3BFisk%2C+M+R%3BMangold%2C+N%3BMeslin%2C+P+Y%3BBeck%2C+P%3BPinet%2C+P%3BLe+Deit%2C+L%3BRapin%2C+W%3BBridges%2C+J+C%3BDyar%2C+D%3BWray%2C+J+J%3BVaniman%2C+D%3BLe+Mouelic%2C+S%3BNewson%2C+H+E%3BAnonymous&rft.aulast=Sautter&rft.aufirst=Violaine&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2015/pdf/1943.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 15 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Sept. 1, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali feldspar; basalts; ChemCam instrument; chemical composition; classification; Curiosity Rover; diorites; emission spectra; feldspar group; felsic composition; framework silicates; Gale Crater; grain size; granodiorites; igneous rocks; image analysis; independent component analysis; K-feldspar; LIBS spectra; Mars; Mars Science Laboratory; MastCam instrument; mesostasis; Noachian; phenocrysts; planets; plutonic rocks; porphyritic texture; silicates; spectra; statistical analysis; terrestrial planets; textures; trachyandesites; trachytes; vesicular texture; volcanic rocks; whole rock ER - TY - JOUR T1 - Oxidation of manganese at Kimberley, Gale Crater; more free oxygen in Mars' past? AN - 1752577708; 2016-003361 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Lanza, N L AU - Wiens, R C AU - Arvidson, R E AU - Clark, B C AU - Fischer, W W AU - Gellert, R AU - Grotzinger, J P AU - Hurowitz, Joel A AU - McLennan, S M AU - Morris, R V AU - Rice, M S AU - Bell, J F, III AU - Berger, J A AU - Blaney, Diana L AU - Blank, J G AU - Bridges, N T AU - Calef, F J, III AU - Campbell, J L AU - Clegg, S M AU - Cousin, Agnes AU - Edgett, K S AU - Fabre, C AU - Fisk, M R AU - Forni, O AU - Frydenvang, J AU - Hardy, K R AU - Hardgrove, C AU - Johnson, J R AU - Kah, L C AU - Lasue, J AU - Le Mouelic, S AU - Malin, M C AU - Mangold, N AU - Martin-Torres, J AU - Maurice, S AU - McBride, M J AU - Ming, D W AU - Newsom, H E AU - Schroeder, S AU - Thompson, L M AU - Treiman, A H AU - VanBommel, S AU - Vaniman, D T AU - Zorzano, M P AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2893 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - calcium KW - oxygen KW - Kimberley KW - enrichment KW - Mars KW - silicon KW - manganese KW - ground water KW - Gale Crater KW - manganese oxides KW - oxides KW - valency KW - Eh KW - ChemCam instrument KW - alkaline earth metals KW - oxidation KW - atmosphere KW - solubility KW - veins KW - terrestrial planets KW - planets KW - paleoenvironment KW - alpha particle X-ray spectra KW - precipitation KW - metals KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577708?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Oxidation+of+manganese+at+Kimberley%2C+Gale+Crater%3B+more+free+oxygen+in+Mars%27+past%3F&rft.au=Lanza%2C+N+L%3BWiens%2C+R+C%3BArvidson%2C+R+E%3BClark%2C+B+C%3BFischer%2C+W+W%3BGellert%2C+R%3BGrotzinger%2C+J+P%3BHurowitz%2C+Joel+A%3BMcLennan%2C+S+M%3BMorris%2C+R+V%3BRice%2C+M+S%3BBell%2C+J+F%2C+III%3BBerger%2C+J+A%3BBlaney%2C+Diana+L%3BBlank%2C+J+G%3BBridges%2C+N+T%3BCalef%2C+F+J%2C+III%3BCampbell%2C+J+L%3BClegg%2C+S+M%3BCousin%2C+Agnes%3BEdgett%2C+K+S%3BFabre%2C+C%3BFisk%2C+M+R%3BForni%2C+O%3BFrydenvang%2C+J%3BHardy%2C+K+R%3BHardgrove%2C+C%3BJohnson%2C+J+R%3BKah%2C+L+C%3BLasue%2C+J%3BLe+Mouelic%2C+S%3BMalin%2C+M+C%3BMangold%2C+N%3BMartin-Torres%2C+J%3BMaurice%2C+S%3BMcBride%2C+M+J%3BMing%2C+D+W%3BNewsom%2C+H+E%3BSchroeder%2C+S%3BThompson%2C+L+M%3BTreiman%2C+A+H%3BVanBommel%2C+S%3BVaniman%2C+D+T%3BZorzano%2C+M+P%3BAnonymous&rft.aulast=Lanza&rft.aufirst=N&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2015/pdf/2893.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 18 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Sept. 8, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; alpha particle X-ray spectra; atmosphere; calcium; ChemCam instrument; Eh; enrichment; Gale Crater; ground water; Kimberley; manganese; manganese oxides; Mars; metals; oxidation; oxides; oxygen; paleoenvironment; planets; precipitation; silicon; solubility; terrestrial planets; valency; veins ER - TY - JOUR T1 - Changes in the firn structure of the western Greenland ice sheet caused by recent warming AN - 1718054502; 2015-094111 AB - Atmospheric warming over the Greenland Ice Sheet during the last 2 decades has increased the amount of surface meltwater production, resulting in the migration of melt and percolation regimes to higher altitudes and an increase in the amount of ice content from refrozen meltwater found in the firn above the superimposed ice zone. Here we present field and airborne radar observations of buried ice layers within the near-surface (0-20 m) firn in western Greenland, obtained from campaigns between 1998 and 2014. We find a sharp increase in firn-ice content in the form of thick widespread layers in the percolation zone, which decreases the capacity of the firn to store meltwater. The estimated total annual ice content retained in the near-surface firn in areas with positive surface mass balance west of the ice divide in Greenland reached a maximum of 74 + or - 25 Gt in 2012, compared to the 1958-1999 average of 13 + or - 2 Gt, while the percolation zone area more than doubled between 2003 and 2012. Increased melt and column densification resulted in surface lowering averaging -0.80 + or - 0.39 m yr (super -1) between 1800 and 2800 m in the accumulation zone of western Greenland. Since 2007, modeled annual melt and refreezing rates in the percolation zone at elevations below 2100 m surpass the annual snowfall from the previous year, implying that mass gain in the region is retained after melt in the form of refrozen meltwater. If current melt trends over high elevation regions continue, subsequent changes in firn structure will have implications for the hydrology of the ice sheet and related abrupt seasonal densification could become increasingly significant for altimetry-derived ice sheet mass balance estimates. JF - The Cryosphere (Online) AU - de la Pena, S AU - Howat, I M AU - Nienow, P W AU - van den Broeke, M R AU - Mosley-Thompson, Ellen AU - Price, S F AU - Mair, D AU - Noel, B AU - Sole, A J Y1 - 2015 PY - 2015 DA - 2015 SP - 1203 EP - 1211 PB - Copernicus on behalf of the European Geosciences Union, Katlenburg-Lindau VL - 9 IS - 3 KW - ice cores KW - Arctic region KW - firn KW - Greenland ice sheet KW - West Greenland KW - radar methods KW - glaciers KW - global change KW - ice sheets KW - climate change KW - Greenland KW - mass balance KW - ice KW - snow KW - climate effects KW - glacial geology KW - global warming KW - airborne methods KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054502?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Cryosphere+%28Online%29&rft.atitle=Changes+in+the+firn+structure+of+the+western+Greenland+ice+sheet+caused+by+recent+warming&rft.au=de+la+Pena%2C+S%3BHowat%2C+I+M%3BNienow%2C+P+W%3Bvan+den+Broeke%2C+M+R%3BMosley-Thompson%2C+Ellen%3BPrice%2C+S+F%3BMair%2C+D%3BNoel%2C+B%3BSole%2C+A+J&rft.aulast=de+la+Pena&rft.aufirst=S&rft.date=2015-01-01&rft.volume=9&rft.issue=3&rft.spage=1203&rft.isbn=&rft.btitle=&rft.title=The+Cryosphere+%28Online%29&rft.issn=1994-0424&rft_id=info:doi/ L2 - http://www.the-cryosphere.net/9/1203/2015/tc-9-1203-2015.pdf http://www.the-cryosphere.net/volumes_and_issues.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2015-01-01 N1 - Number of references - 36 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2015-10-01 N1 - SubjectsTermNotLitGenreText - airborne methods; Arctic region; climate change; climate effects; firn; glacial geology; glaciers; global change; global warming; Greenland; Greenland ice sheet; ice; ice cores; ice sheets; mass balance; radar methods; snow; West Greenland ER - TY - JOUR T1 - Genome Sequence and Transcriptome Analyses of Chrysochromulina tobin: Metabolic Tools for Enhanced Algal Fitness in the Prominent Order Prymnesiales (Haptophyceae). AN - 1717484414; 26397803 AB - Haptophytes are recognized as seminal players in aquatic ecosystem function. These algae are important in global carbon sequestration, form destructive harmful blooms, and given their rich fatty acid content, serve as a highly nutritive food source to a broad range of eco-cohorts. Haptophyte dominance in both fresh and marine waters is supported by the mixotrophic nature of many taxa. Despite their importance the nuclear genome sequence of only one haptophyte, Emiliania huxleyi (Isochrysidales), is available. Here we report the draft genome sequence of Chrysochromulina tobin (Prymnesiales), and transcriptome data collected at seven time points over a 24-hour light/dark cycle. The nuclear genome of C. tobin is small (59 Mb), compact (∼ 40% of the genome is protein coding) and encodes approximately 16,777 genes. Genes important to fatty acid synthesis, modification, and catabolism show distinct patterns of expression when monitored over the circadian photoperiod. The C. tobin genome harbors the first hybrid polyketide synthase/non-ribosomal peptide synthase gene complex reported for an algal species, and encodes potential anti-microbial peptides and proteins involved in multidrug and toxic compound extrusion. A new haptophyte xanthorhodopsin was also identified, together with two "red" RuBisCO activases that are shared across many algal lineages. The Chrysochromulina tobin genome sequence provides new information on the evolutionary history, ecology and economic importance of haptophytes. JF - PLoS genetics AU - Hovde, Blake T AU - Deodato, Chloe R AU - Hunsperger, Heather M AU - Ryken, Scott A AU - Yost, Will AU - Jha, Ramesh K AU - Patterson, Johnathan AU - Monnat, Raymond J AU - Barlow, Steven B AU - Starkenburg, Shawn R AU - Cattolico, Rose Ann AD - Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America. ; Department of Biology, University of Washington, Seattle, Washington, United States of America. ; Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America. ; Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America; University of Washington, Department of Pathology, Seattle, Washington, United States of America. ; Electron Microscope Facility, San Diego State University, San Diego, California, United States of America. Y1 - 2015 PY - 2015 DA - 2015 SP - 1 VL - 11 IS - 9 KW - Ribulose-Bisphosphate Carboxylase KW - EC 4.1.1.39 KW - Index Medicus KW - Phylogeny KW - Gene Expression Profiling KW - Base Sequence KW - Sequence Analysis, DNA KW - Molecular Sequence Annotation KW - Ribulose-Bisphosphate Carboxylase -- genetics KW - Genome -- genetics KW - Genetic Fitness KW - Haptophyta -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1717484414?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=PLoS+genetics&rft.atitle=Genome+Sequence+and+Transcriptome+Analyses+of+Chrysochromulina+tobin%3A+Metabolic+Tools+for+Enhanced+Algal+Fitness+in+the+Prominent+Order+Prymnesiales+%28Haptophyceae%29.&rft.au=Hovde%2C+Blake+T%3BDeodato%2C+Chloe+R%3BHunsperger%2C+Heather+M%3BRyken%2C+Scott+A%3BYost%2C+Will%3BJha%2C+Ramesh+K%3BPatterson%2C+Johnathan%3BMonnat%2C+Raymond+J%3BBarlow%2C+Steven+B%3BStarkenburg%2C+Shawn+R%3BCattolico%2C+Rose+Ann&rft.aulast=Hovde&rft.aufirst=Blake&rft.date=2015-01-01&rft.volume=11&rft.issue=9&rft.spage=e1005469&rft.isbn=&rft.btitle=&rft.title=PLoS+genetics&rft.issn=1553-7404&rft_id=info:doi/10.1371%2Fjournal.pgen.1005469 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-04-29 N1 - Date created - 2015-09-24 N1 - Date revised - 2017-02-17 N1 - Genetic sequence - PRJNA263501; BioProject; SRX1016799; SRA; SRX1009273 N1 - SuppNotes - Cited By: Comp Biochem Physiol B Biochem Mol Biol. 2003 Dec;136(4):775-83 [14662302] Nucleic Acids Res. 2004;32(5):1792-7 [15034147] J Mol Evol. 2004 Mar;58(3):348-58 [15045490] BMC Bioinformatics. 2004 May 14;5:59 [15144565] Nucleic Acids Res. 2004 Jul 1;32(Web Server issue):W526-31 [15215442] Annu Rev Microbiol. 2004;58:453-88 [15487945] Bacteriol Rev. 1973 Sep;37(3):166-96 [4202146] Antimicrob Agents Chemother. 1975 Mar;7(3):320-1 [1137385] J Antibiot (Tokyo). 1983 Feb;36(2):131-41 [6833128] Carcinogenesis. 1986 Nov;7(11):1899-901 [2876785] Proc Natl Acad Sci U S A. 1989 Jul;86(13):4996-9 [2740337] J Bacteriol. 1991 Aug;173(15):4692-9 [1856168] Zoolog Sci. 1996 Feb;13(1):111-7 [8688805] Microbiology. 1999 Apr;145 ( Pt 4):855-68 [10220165] J Mol Biol. 1999 Sep 17;292(2):195-202 [10493868] Bioinformatics. 2005 May 1;21(9):2104-5 [15647292] Bioinformatics. 2005 Sep 15;21(18):3674-6 [16081474] J Am Chem Soc. 2005 Nov 2;127(43):14986-7 [16248612] Nature. 2005 Nov 3;438(7064):90-3 [16267554] Eukaryot Cell. 2010 Apr;9(4):486-501 [20139239] Mar Drugs. 2010;8(3):678-704 [20411121] Nat Biotechnol. 2010 May;28(5):511-5 [20436464] Bioinformatics. 2010 Jul 15;26(14):1783-5 [20562416] Methods Enzymol. 2011;487:545-74 [21187238] Plant Physiol. 2011 Jan;155(1):27-35 [20974895] Nucleic Acids Res. 2011 Jan;39(2):e9 [21059678] Gene. 2011 May 1;476(1-2):20-6 [21320580] Nat Biotechnol. 2011 Jul;29(7):644-52 [21572440] J Mol Biol. 2009 Jan 16;385(2):381-92 [19041878] Bioinformatics. 2009 May 1;25(9):1105-11 [19289445] Proc Natl Acad Sci U S A. 2009 Aug 4;106(31):12803-8 [19622724] Proteins. 2009;77 Suppl 9:89-99 [19701941] Nucleic Acids Res. 2010 Jan;38(Database issue):D774-80 [19923233] J Chem Theory Comput. 2015 Feb 10;11(2):609-22 [25866491] Mol Biol Evol. 2000 Apr;17(4):576-83 [10742049] Metab Eng. 2001 Jan;3(1):78-95 [11162234] Plant Cell. 2001 Jul;13(7):1477-80 [11449044] Nat Prod Rep. 2001 Aug;18(4):380-416 [11548049] J Eukaryot Microbiol. 2011 Jul-Aug;58(4):315-8 [21518078] Nat Commun. 2011;2:183 [21304512] Toxicol Lett. 2011 Aug 28;205(2):116-21 [21683775] Mol Biol Evol. 2011 Oct;28(10):2921-33 [21551270] Annu Rev Microbiol. 2011;65:369-87 [21682644] New Phytol. 2011 Oct;192(2):471-82 [21762165] Nature. 2011 Nov 10;479(7372):194-9 [22048315] BMC Bioinformatics. 2011;12:491 [22192575] Biochemistry. 2012 Feb 28;51(8):1740-51 [22303981] PLoS One. 2012;7(4):e34791 [22523558] Environ Microbiol. 2012 Jun;14(6):1466-76 [22463064] PLoS One. 2012;7(6):e38975 [22745696] Curr Drug Targets. 2012 Aug;13(9):1148-57 [22664076] Mol Biol Evol. 2012 Aug;29(8):1969-73 [22367748] Mol Ecol. 2013 Jan;22(1):87-101 [23163508] J Exp Bot. 2013 Jan;64(3):787-98 [23095996] PLoS One. 2013;8(1):e54143 [23349809] PLoS One. 2013;8(3):e57487 [23526944] Environ Microbiol Rep. 2013 Apr;5(2):322-32 [23584973] ISME J. 2013 May;7(5):922-36 [23364354] Nature. 2013 Jul 11;499(7457):209-13 [23760476] Proc Natl Acad Sci U S A. 2013 Dec 3;110(49):19748-53 [24248374] PLoS Genet. 2014 Jan;10(1):e1004094 [24415958] Biochim Biophys Acta. 2014 May;1837(5):614-25 [24060527] BMC Genomics. 2014;15:212 [24646409] Proc Natl Acad Sci U S A. 2014 May 6;111(18):6538-9 [24737891] PLoS One. 2014;9(6):e97801 [24926657] PLoS Biol. 2014 Jun;12(6):e1001889 [24959919] J Biol Chem. 2014 May 23;289(21):14624-32 [24711447] BMC Genomics. 2014;15:604 [25034814] PLoS One. 2014;9(12):e114941 [25506945] J Eukaryot Microbiol. 2015 Jan-Feb;62(1):121-40 [25099994] BMC Evol Biol. 2015;15:16 [25887237] ISME J. 2015 Jun;9(6):1365-77 [25461969] Proc Natl Acad Sci U S A. 2005 Dec 13;102(50):18147-52 [16330755] BMC Bioinformatics. 2006;7:62 [16469098] Trends Microbiol. 2006 Nov;14(11):463-9 [17008099] Trends Pharmacol Sci. 2006 Nov;27(11):587-93 [16996621] Bioinformatics. 2006 Nov 1;22(21):2688-90 [16928733] Bioinformatics. 2007 May 1;23(9):1061-7 [17332020] Chembiochem. 2007 Sep 24;8(14):1736-43 [17722120] Microbiol Mol Biol Rev. 2007 Dec;71(4):576-99 [18063718] Genome Res. 2008 May;18(5):821-9 [18349386] Plant J. 2008 May;54(4):621-39 [18476868] Genes Genet Syst. 2008 Apr;83(2):135-42 [18506097] BMC Genomics. 2008;9:215 [18474103] Mol Biol Evol. 2008 Jul;25(7):1253-6 [18397919] Nat Methods. 2008 Jul;5(7):621-8 [18516045] Proc Natl Acad Sci U S A. 2008 Oct 28;105(43):16561-5 [18922772] Genome Res. 2008 Dec;18(12):1979-90 [18757608] Antonie Van Leeuwenhoek. 2001 Sep;79(3-4):229-34 [11816964] Curr Opin Chem Biol. 2003 Apr;7(2):285-95 [12714063] Bioinformatics. 2003 Aug 12;19(12):1572-4 [12912839] Comp Biochem Physiol B Biochem Mol Biol. 2003 Dec;136(4):743-54 [14662299] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1371/journal.pgen.1005469 ER - TY - JOUR T1 - A complete electrical arc hazard classification system and its application AN - 1705081975; PQ0001544465 AB - The Standard for Electrical Safety in the Workplace, NFPA 70E, and relevant OSHA electrical safety standards evolved in the US, over the past 40 years, to address the hazards of 60-Hz power that are faced primarily by electricians, linemen, and others performing facility and utility work. This leaves a substantial gap in the management of other types of electrical hazards including battery banks, DC power systems, capacitor banks, and solar power systems. Although many of these systems are fed by 50/60-Hz alternating current (ac) energy, we find substantial use of direct current (dc) electrical energy, and the use of capacitors, inductors, batteries, solar, and radiofrequency (RF) power. The electrical hazards of these forms of electricity and their systems are different than for 50/60 Hz ac power. JF - IEEE Conferences AU - Gordon, Lloyd B AU - Graham, Nicole AD - Los Alamos National Laboratory, P.O. Box 1280, NM 87544, USA Y1 - 2015/01// PY - 2015 DA - Jan 2015 SP - 1 EP - 12 PB - Institute of Electrical and Electronics Engineers, Inc., 3 Park Avenue, 17th Fl New York NY 10016-5997 USA KW - Risk Abstracts; Health & Safety Science Abstracts KW - Hazards KW - Federal regulations KW - Safety regulations KW - Batteries KW - Conferences KW - Classification KW - Energy KW - Safety KW - Occupational safety KW - Solar energy KW - H 1000:Occupational Safety and Health KW - R2 23010:General: Models, forecasting UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1705081975?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=IEEE+Conferences&rft.atitle=A+complete+electrical+arc+hazard+classification+system+and+its+application&rft.au=Gordon%2C+Lloyd+B%3BGraham%2C+Nicole&rft.aulast=Gordon&rft.aufirst=Lloyd&rft.date=2015-01-01&rft.volume=&rft.issue=&rft.spage=1&rft.isbn=9781479947836&rft.btitle=&rft.title=IEEE+Conferences&rft.issn=&rft_id=info:doi/10.1109%2FESW.2015.7094937 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2015-09-03 N1 - SubjectsTermNotLitGenreText - Hazards; Federal regulations; Safety regulations; Classification; Conferences; Batteries; Energy; Occupational safety; Safety; Solar energy DO - http://dx.doi.org/10.1109/ESW.2015.7094937 ER - TY - JOUR T1 - Identification of different oxygen species in oxide nanostructures with (super 17) O solid-state NMR spectroscopy AN - 1692742583; 2015-060361 JF - Science Advances AU - Wang, Meng AU - Wu, Xinping AU - Zheng, Sujuan AU - Zhao, Li AU - Li, Lei AU - Shen, Li AU - Gao, Yuxian AU - Xue, Nianhua AU - Guo, Xuefeng AU - Huang, Weixin AU - Gan, Zhehong AU - Blanc, Frederic AU - Yu, Zhiwu AU - Ke, Xiaokang AU - Ding, Weiping AU - Gong, Xueqing AU - Grey, Clare P AU - Peng, Luming Y1 - 2015 PY - 2015 DA - 2015 EP - e1400133 PB - American Association for the Advancement of Science, Washington, DC VL - 1 IS - 1 KW - oxygen KW - isotopes KW - microstructure KW - characterization KW - crystal structure KW - stable isotopes KW - NMR spectra KW - temperature KW - physical properties KW - identification KW - oxides KW - O-17 KW - spectra KW - crystal chemistry KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742583?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+Advances&rft.atitle=Identification+of+different+oxygen+species+in+oxide+nanostructures+with+%28super+17%29+O+solid-state+NMR+spectroscopy&rft.au=Wang%2C+Meng%3BWu%2C+Xinping%3BZheng%2C+Sujuan%3BZhao%2C+Li%3BLi%2C+Lei%3BShen%2C+Li%3BGao%2C+Yuxian%3BXue%2C+Nianhua%3BGuo%2C+Xuefeng%3BHuang%2C+Weixin%3BGan%2C+Zhehong%3BBlanc%2C+Frederic%3BYu%2C+Zhiwu%3BKe%2C+Xiaokang%3BDing%2C+Weiping%3BGong%2C+Xueqing%3BGrey%2C+Clare+P%3BPeng%2C+Luming&rft.aulast=Wang&rft.aufirst=Meng&rft.date=2015-01-01&rft.volume=1&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Science+Advances&rft.issn=2375-2548&rft_id=info:doi/10.1126%2Fsciadv.1400133 L2 - http://advances.sciencemag.org/content/1/2 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 39 N1 - PubXState - DC N1 - Document feature - illus. N1 - SuppNotes - Includes supplementary material N1 - Last updated - 2015-07-02 N1 - SubjectsTermNotLitGenreText - characterization; crystal chemistry; crystal structure; identification; isotopes; microstructure; NMR spectra; O-17; oxides; oxygen; physical properties; spectra; stable isotopes; temperature DO - http://dx.doi.org/10.1126/sciadv.1400133 ER - TY - JOUR T1 - The soil matrix increases microbial C stabilization in temperate and tropical forest soils AN - 1687663914; 21154405 AB - Microbial biomass represents a substantial source of labile C contributing to soil organic matter (SOM) maintenance. Microbial residues may associate with the soil matrix through a variety of mechanisms, reducing its bioavailability and increasing its persistence in soil. Our objective was to examine soil matrix effects on the stability of non-living microbial C inputs in two contrasting forest ecosystems by following microbial residues (Fungi, Actinobacteria, Gram-positive bacteria (Gm +), Gram-negative bacteria (Gm -)) into SOM fractions in a temperate forest in California (CA) and a tropical forest in Puerto Rico (PR) for 3 and 2 years, respectively. We isolated 3 SOM fractions: (i) free light fraction (FLF), (ii) occluded light fraction (OLF), and (iii) dense fraction (DF). Additionally, we characterized SOM fraction chemistry to infer quality and source of native fraction SOM. Our results showed greater stabilization as mineral-associated microbial C (i.e., as DF and OLF), compared with loose detrital C (i.e., FLF). There was no microbial group effect (i.e., differences in fraction C recovery among different microbial cell types). Our findings suggest that mineral association is more important for stabilizing non-living microbial C in soil than the cellular structure of the initial source of microbial inputs, with site specific edaphic factors as the major controllers of the amount of microbial residues stabilized. JF - Biogeochemistry AU - Throckmorton, Heather M AU - Bird, Jeffrey A AU - Monte, Nick AU - Doane, Tad AU - Firestone, Mary K AU - Horwath, William R AD - Los Alamos National Lab, MS 495, Los Alamos, NM, 87545, USA, hthrockmorton@lanl.gov Y1 - 2015/01// PY - 2015 DA - January 2015 SP - 35 EP - 45 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 122 IS - 1 SN - 0168-2563, 0168-2563 KW - Microbiology Abstracts A: Industrial & Applied Microbiology; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts KW - Forest Soils KW - Gram-positive bacteria KW - Ecological Effects KW - Soil KW - Bioavailability KW - INE, USA, California KW - Gram-negative bacteria KW - Soils KW - Bacteria KW - Biogeochemistry KW - Biogeochemical cycle KW - Organic matter KW - Fungi KW - Soils (organic) KW - Biomass KW - Stabilizing KW - Maintenance KW - Bioaccumulation KW - ASW, Caribbean Sea, Greater Antilles, Puerto Rico KW - Water Pollution Effects KW - Tropical environment KW - Actinobacteria KW - Microorganisms KW - Group effects KW - Minerals KW - Q2 09262:Methods and instruments KW - SW 0810:General KW - A 01390:Forestry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1687663914?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologya&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biogeochemistry&rft.atitle=The+soil+matrix+increases+microbial+C+stabilization+in+temperate+and+tropical+forest+soils&rft.au=Throckmorton%2C+Heather+M%3BBird%2C+Jeffrey+A%3BMonte%2C+Nick%3BDoane%2C+Tad%3BFirestone%2C+Mary+K%3BHorwath%2C+William+R&rft.aulast=Throckmorton&rft.aufirst=Heather&rft.date=2015-01-01&rft.volume=122&rft.issue=1&rft.spage=35&rft.isbn=&rft.btitle=&rft.title=Biogeochemistry&rft.issn=01682563&rft_id=info:doi/10.1007%2Fs10533-014-0027-6 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-06-01 N1 - Number of references - 47 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Bioavailability; Biogeochemical cycle; Biogeochemistry; Fungi; Organic matter; Tropical environment; Soils; Group effects; Stabilizing; Soil; Gram-positive bacteria; Gram-negative bacteria; Soils (organic); Biomass; Minerals; Bacteria; Bioaccumulation; Water Pollution Effects; Forest Soils; Microorganisms; Ecological Effects; Maintenance; Actinobacteria; ASW, Caribbean Sea, Greater Antilles, Puerto Rico; INE, USA, California DO - http://dx.doi.org/10.1007/s10533-014-0027-6 ER - TY - JOUR T1 - Acoustic- and elastic-waveform inversion using a modified total-variation regularization scheme AN - 1686061850; 2015-049703 AB - Subsurface velocities within the Earth often contain piecewise-constant structures with sharp interfaces. Acoustic- and elastic-waveform inversion (AEWI) usually produces smoothed inversion results of subsurface geophysical properties. We develop novel AEWI methods using a modified total-variation regularization scheme to preserve sharp interfaces in piecewise-constant structures and improve the accuracy of compressional- and shear wave velocity inversion. We use an alternating-minimization algorithm to solve the minimization problem of our new waveform inversion methods. We decouple the original optimization problem into two simple subproblems: a standard waveform inversion subproblem with the Tikhonov regularization and a standard L2-TV subproblem. We solve these two subproblems separately using the non-linear conjugate-gradient and split-Bregman iterative methods. The computational costs of our new waveform inversion methods using the modified total-variation regularization scheme are comparable to those of conventional waveform inversion approaches. Our numerical examples using synthetic seismic reflection data show that our new methods not only preserve sharp interfaces of subsurface structures, but also significantly improve the accuracy of compressional- and shear wave velocity inversion. JF - Geophysical Journal International AU - Lin, Youzuo AU - Huang, Lianjie Y1 - 2015/01// PY - 2015 DA - January 2015 SP - 489 EP - 502 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 200 IS - 1 SN - 0956-540X, 0956-540X KW - tomography KW - body waves KW - numerical models KW - geophysical methods KW - data processing KW - inverse problem KW - elastic waves KW - waveforms KW - seismic methods KW - velocity structure KW - mathematical methods KW - seismic waves KW - algorithms KW - crust KW - acoustical waves KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686061850?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Acoustic-+and+elastic-waveform+inversion+using+a+modified+total-variation+regularization+scheme&rft.au=Lin%2C+Youzuo%3BHuang%2C+Lianjie&rft.aulast=Lin&rft.aufirst=Youzuo&rft.date=2015-01-01&rft.volume=200&rft.issue=1&rft.spage=489&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu393 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 42 N1 - Document feature - illus. N1 - Last updated - 2015-06-05 N1 - SubjectsTermNotLitGenreText - acoustical waves; algorithms; body waves; crust; data processing; elastic waves; geophysical methods; inverse problem; mathematical methods; numerical models; seismic methods; seismic waves; tomography; velocity structure; waveforms DO - http://dx.doi.org/10.1093/gji/ggu393 ER - TY - JOUR T1 - X-Ray Crystal Structure and Properties of Phanta, a Weakly Fluorescent Photochromic GFP-Like Protein. AN - 1677888289; 25923520 AB - Phanta is a reversibly photoswitching chromoprotein (ΦF, 0.003), useful for pcFRET, that was isolated from a mutagenesis screen of the bright green fluorescent eCGP123 (ΦF, 0.8). We have investigated the contribution of substitutions at positions His193, Thr69 and Gln62, individually and in combination, to the optical properties of Phanta. Single amino acid substitutions at position 193 resulted in proteins with very low ΦF, indicating the importance of this position in controlling the fluorescence efficiency of the variant proteins. The substitution Thr69Val in Phanta was important for supressing the formation of a protonated chromophore species observed in some His193 substituted variants, whereas the substitution Gln62Met did not significantly contribute to the useful optical properties of Phanta. X-ray crystal structures for Phanta (2.3 Å), eCGP123T69V (2.0 Å) and eCGP123H193Q (2.2 Å) in their non-photoswitched state were determined, revealing the presence of a cis-coplanar chromophore. We conclude that changes in the hydrogen-bonding network supporting the cis-chromophore, and its contacts with the surrounding protein matrix, are responsible for the low fluorescence emission of eCGP123 variants containing a His193 substitution. JF - PloS one AU - Don Paul, Craig AU - Traore, Daouda A K AU - Olsen, Seth AU - Devenish, Rodney J AU - Close, Devin W AU - Bell, Toby D M AU - Bradbury, Andrew AU - Wilce, Matthew C J AU - Prescott, Mark AD - Department of Neuro- and Sensory Physiology, University Medicine, Göttingen, 37073, Göttingen, Germany. ; Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton campus, Victoria, 3800, Australia. ; School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland, 4072, Australia. ; Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, United States of America. ; School of Chemistry, Monash University, Clayton campus, Victoria, 3800, Australia. Y1 - 2015 PY - 2015 DA - 2015 SP - 1 VL - 10 IS - 4 KW - Fluorescent Dyes KW - 0 KW - Green Fluorescent Proteins KW - 147336-22-9 KW - Index Medicus KW - Fluorescence KW - Models, Molecular KW - Photochemical Processes KW - Escherichia coli -- genetics KW - Crystallography, X-Ray KW - Hydrogen Bonding KW - Amino Acid Substitution KW - Protein Conformation KW - Fluorescent Dyes -- metabolism KW - Green Fluorescent Proteins -- chemistry KW - Fluorescent Dyes -- chemistry KW - Green Fluorescent Proteins -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1677888289?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=PloS+one&rft.atitle=X-Ray+Crystal+Structure+and+Properties+of+Phanta%2C+a+Weakly+Fluorescent+Photochromic+GFP-Like+Protein.&rft.au=Don+Paul%2C+Craig%3BTraore%2C+Daouda+A+K%3BOlsen%2C+Seth%3BDevenish%2C+Rodney+J%3BClose%2C+Devin+W%3BBell%2C+Toby+D+M%3BBradbury%2C+Andrew%3BWilce%2C+Matthew+C+J%3BPrescott%2C+Mark&rft.aulast=Don+Paul&rft.aufirst=Craig&rft.date=2015-01-01&rft.volume=10&rft.issue=4&rft.spage=e0123338&rft.isbn=&rft.btitle=&rft.title=PloS+one&rft.issn=1932-6203&rft_id=info:doi/10.1371%2Fjournal.pone.0123338 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-01-25 N1 - Date created - 2015-04-30 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: J Am Chem Soc. 2012 May 9;134(18):7913-23 [22486524] BMC Biotechnol. 2003 May 22;3:5 [12769828] Acta Crystallogr D Biol Crystallogr. 2012 Sep;68(Pt 9):1088-97 [22948909] Nat Biotechnol. 2012 Jul;30(7):708-14 [22729030] Nat Commun. 2013;4:1461 [23403562] Sci Rep. 2013;3:1847 [23677204] Nat Methods. 2013 Aug;10(8):751-4 [23770755] PLoS One. 2013;8(9):e75835 [24098733] J Biol Chem. 2003 Nov 7;278(45):44626-31 [12909624] J Biol Chem. 2003 Nov 21;278(47):46288-92 [12975373] Faraday Discuss. 2004;127:149-63 [15471344] Trends Biochem Sci. 1995 Nov;20(11):448-55 [8578587] Science. 1996 Sep 6;273(5280):1392-5 [8703075] Annu Rev Biochem. 1998;67:509-44 [9759496] Proc Natl Acad Sci U S A. 1999 Sep 28;96(20):11241-6 [10500161] Proc Natl Acad Sci U S A. 2004 Nov 9;101(45):15905-10 [15505211] Science. 2004 Nov 19;306(5700):1370-3 [15550670] Nucleic Acids Res. 2007 Jul;35(Web Server issue):W375-83 [17452350] Proc Natl Acad Sci U S A. 2007 Aug 7;104(32):13005-9 [17646653] J Cell Sci. 2007 Dec 15;120(Pt 24):4247-60 [18057027] Nat Methods. 2008 Jun;5(6):545-51 [18454154] Proc Natl Acad Sci U S A. 2008 Jul 8;105(27):9227-32 [18574155] Nat Biotechnol. 2008 Sep;26(9):1035-40 [18724362] J Am Chem Soc. 2008 Sep 24;130(38):12578-9 [18761441] Brain Cell Biol. 2008 Aug;36(1-4):31-42 [18512154] Proc Natl Acad Sci U S A. 2008 Nov 25;105(47):18343-8 [19017808] Protein Eng Des Sel. 2009 May;22(5):313-23 [19364809] Nat Methods. 2009 May;6(5):351-3 [19349978] Biochemistry. 2009 Jun 9;48(22):4905-15 [19371086] Nature. 2009 Oct 22;461(7267):1105-9 [19847261] Proc Natl Acad Sci U S A. 2005 Sep 6;102(36):12712-7 [16120682] Nat Biotechnol. 2004 Dec;22(12):1567-72 [15558047] J Am Chem Soc. 2009 Dec 23;131(50):18063-5 [19950947] Proc Natl Acad Sci U S A. 2006 Mar 14;103(11):4089-94 [16537489] J Mol Biol. 2006 Nov 24;364(2):213-24 [17010376] Protein Eng Des Sel. 2007 Feb;20(2):69-79 [17277006] J Am Chem Soc. 2007 Apr 25;129(16):4870-1 [17385864] J Mol Biol. 2007 May 11;368(4):998-1010 [17376484] Biochemistry. 2007 May 8;46(18):5494-504 [17439158] J Am Chem Soc. 2010 Feb 3;132(4):1192-3 [20067241] Acta Crystallogr D Biol Crystallogr. 2010 Feb;66(Pt 2):125-32 [20124692] Acta Crystallogr D Biol Crystallogr. 2010 Apr;66(Pt 4):486-501 [20383002] Chem Biol. 2010 Jul 30;17(7):745-55 [20659687] Physiol Rev. 2010 Jul;90(3):1103-63 [20664080] J Biomol NMR. 2010 Dec;48(4):237-46 [21052778] Acta Crystallogr D Biol Crystallogr. 2011 Apr;67(Pt 4):235-42 [21460441] Nature. 2011 Oct 13;478(7368):204-8 [21909116] Nat Biotechnol. 2011 Oct;29(10):942-7 [21909082] J Am Chem Soc. 2011 Nov 23;133(46):18586-9 [22039963] Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Oct 1;67(Pt 10):1266-8 [22102044] J Phys Chem B. 2013 Oct 10;117(40):11954-9 [24033093] Biochemistry. 2014 Sep 23;53(37):5947-57 [25184668] J Phys Chem B. 2015 Feb 12;119(6):2404-14 [25325882] J Phys Chem B. 2015 Feb 12;119(6):2350-62 [25369171] Nat Struct Biol. 2000 Dec;7(12):1133-8 [11101896] Proc Natl Acad Sci U S A. 2001 Jan 16;98(2):462-7 [11209050] FEBS Lett. 2001 Oct 19;507(1):16-20 [11682051] BMC Biochem. 2002 Apr 24;3:7 [11972899] Biophys J. 2002 Dec;83(6):3570-7 [12496124] Biochemistry. 2002 Dec 31;41(52):15477-88 [12501176] Nat Biotechnol. 2003 Feb;21(2):191-4 [12524551] Structure. 2003 Mar;11(3):275-84 [12623015] J Biol Chem. 2003 Sep 5;278(36):34167-71 [12819206] PLoS One. 2012;7(7):e41028 [22815901] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1371/journal.pone.0123338 ER - TY - JOUR T1 - Thermophysical properties of U sub(3)Si sub(5) to 1773 K AN - 1673393406; PQ0001169702 AB - Possible use of U sub(3)Si sub(5) as a nuclear reactor fuel requires knowledge of its thermophysical properties as a function of temperature. While limited data is available for U-Si compounds containing higher uranium densities, no investigations of U sub(3)Si sub(5) have been presented in the literature to date. High purity U sub(3)Si sub(5) was fabricated to facilitate a set of experiments to determine the coefficient of thermal expansion, heat capacity, thermal diffusivity, and thermal conductivity from room temperature to 1773 K. Each measurement on nearly stoichiometric U sub(3)Si sub(5) showed the existence of a phase transformation at 723 K, which is not consistent with the most recently published phase diagram. JF - Journal of Nuclear Materials AU - White, J T AU - Nelson, A T AU - Byler, D D AU - Safarik, D J AU - Dunwoody, J T AU - McClellan, K J AD - Material Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM, United States, jtwhite@lanl.gov Y1 - 2015/01// PY - 2015 DA - Jan 2015 SP - 442 EP - 448 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 456 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Nuclear reactors KW - Thermal expansion KW - Thermal conductivity KW - Uranium KW - Fuels KW - Nuclear fuels KW - Radioactive materials KW - Thermal diffusivity KW - Temperature KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673393406?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Thermophysical+properties+of+U+sub%283%29Si+sub%285%29+to+1773+K&rft.au=White%2C+J+T%3BNelson%2C+A+T%3BByler%2C+D+D%3BSafarik%2C+D+J%3BDunwoody%2C+J+T%3BMcClellan%2C+K+J&rft.aulast=White&rft.aufirst=J&rft.date=2015-01-01&rft.volume=456&rft.issue=&rft.spage=442&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.10.021 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-04-01 N1 - Number of references - 24 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Thermal expansion; Nuclear reactors; Thermal conductivity; Fuels; Uranium; Thermal diffusivity; Radioactive materials; Nuclear fuels; Temperature DO - http://dx.doi.org/10.1016/j.jnucmat.2014.10.021 ER - TY - JOUR T1 - Diagenesis and clay mineral formation at Gale Crater, Mars AN - 1668230632; 2015-032272 AB - The Mars Science Laboratory rover Curiosity found host rocks of basaltic composition and alteration assemblages containing clay minerals at Yellowknife Bay, Gale Crater. On the basis of the observed host rock and alteration minerals, we present results of equilibrium thermochemical modeling of the Sheepbed mudstones of Yellowknife Bay in order to constrain the formation conditions of its secondary mineral assemblage. Building on conclusions from sedimentary observations by the Mars Science Laboratory team, we assume diagenetic, in situ alteration. The modeling shows that the mineral assemblage formed by the reaction of a CO (sub 2) -poor and oxidizing, dilute aqueous solution (Gale Portage Water) in an open system with the Fe-rich basaltic-composition sedimentary rocks at 10-50 degrees C and water/rock ratio (mass of rock reacted with the starting fluid) of 100-1000, pH of approximately 7.5-12. Model alteration assemblages predominantly contain phyllosilicates (Fe-smectite, chlorite), the bulk composition of a mixture of which is close to that of saponite inferred from Chemistry and Mineralogy data and to that of saponite observed in the nakhlite Martian meteorites and terrestrial analogues. To match the observed clay mineral chemistry, inhomogeneous dissolution dominated by the amorphous phase and olivine is required. We therefore deduce a dissolving composition of approximately 70% amorphous material, with 20% olivine, and 10% whole rock component. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Bridges, J C AU - Schwenzer, S P AU - Leveille, R AU - Westall, F AU - Wiens, R C AU - Mangold, N AU - Bristow, T AU - Edwards, P AU - Berger, G Y1 - 2015/01// PY - 2015 DA - January 2015 SP - 1 EP - 19 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 1 SN - 2169-9097, 2169-9097 KW - silicates KW - clay KW - alteration KW - stony meteorites KW - Martian meteorites KW - olivine group KW - Mars KW - aqueous solutions KW - Gale Crater KW - carbon dioxide KW - meteorites KW - sedimentary rocks KW - olivine KW - sediments KW - orthosilicates KW - thermochemical properties KW - mineral assemblages KW - chlorite group KW - basaltic composition KW - Yellowknife Bay KW - mudstone KW - clastic sediments KW - amorphous materials KW - saponite KW - smectite KW - achondrites KW - clay minerals KW - terrestrial planets KW - nesosilicates KW - chlorite KW - planets KW - diagenesis KW - sheet silicates KW - clastic rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668230632?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Diagenesis+and+clay+mineral+formation+at+Gale+Crater%2C+Mars&rft.au=Bridges%2C+J+C%3BSchwenzer%2C+S+P%3BLeveille%2C+R%3BWestall%2C+F%3BWiens%2C+R+C%3BMangold%2C+N%3BBristow%2C+T%3BEdwards%2C+P%3BBerger%2C+G&rft.aulast=Bridges&rft.aufirst=J&rft.date=2015-01-01&rft.volume=120&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004757 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 59 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - achondrites; alteration; amorphous materials; aqueous solutions; basaltic composition; carbon dioxide; chlorite; chlorite group; clastic rocks; clastic sediments; clay; clay minerals; diagenesis; Gale Crater; Mars; Martian meteorites; meteorites; mineral assemblages; mudstone; nesosilicates; olivine; olivine group; orthosilicates; planets; saponite; sedimentary rocks; sediments; sheet silicates; silicates; smectite; stony meteorites; terrestrial planets; thermochemical properties; Yellowknife Bay DO - http://dx.doi.org/10.1002/2014JE004757 ER - TY - JOUR T1 - The seismic noise environment of Antarctica AN - 1664439628; 2015-026699 JF - Seismological Research Letters AU - Anthony, Robert E AU - Aster, Richard C AU - Wiens, Douglas AU - Nyblade, Andrew A AU - Anandakrishnan, Sridhar AU - Huerta, Audrey AU - Winberry, J Paul AU - Wilson, Terry J AU - Rowe, Charlotte Y1 - 2015/01// PY - 2015 DA - January 2015 SP - 89 EP - 100 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 1 SN - 0895-0695, 0895-0695 KW - technology KW - sea ice KW - information management KW - noise KW - ice caps KW - data management KW - boreholes KW - Antarctica KW - seismicity KW - ice KW - glacial geology KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664439628?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=The+seismic+noise+environment+of+Antarctica&rft.au=Anthony%2C+Robert+E%3BAster%2C+Richard+C%3BWiens%2C+Douglas%3BNyblade%2C+Andrew+A%3BAnandakrishnan%2C+Sridhar%3BHuerta%2C+Audrey%3BWinberry%2C+J+Paul%3BWilson%2C+Terry+J%3BRowe%2C+Charlotte&rft.aulast=Anthony&rft.aufirst=Robert&rft.date=2015-01-01&rft.volume=86&rft.issue=1&rft.spage=89&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220140109 L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 45 N1 - PubXState - CA N1 - Document feature - illus. N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - Antarctica; boreholes; data management; glacial geology; ice; ice caps; information management; instruments; noise; sea ice; seismicity; technology DO - http://dx.doi.org/10.1785/0220140109 ER - TY - JOUR T1 - N-acetyl cysteine mitigates the acute effects of cocaine-induced toxicity in astroglia-like cells. AN - 1652419522; 25617894 AB - Cocaine has a short half-life of only about an hour but its effects, predominantly on the central nervous system (CNS), are fairly long-lasting. Of all cells within the CNS, astrocytes may be the first to display cocaine toxicity owing to their relative abundance in the brain. Cocaine entry could trigger several early response changes that adversely affect their survival, and inhibiting these changes could conversely increase their rate of survival. In order to identify these changes and the minimal concentrations of cocaine that can elicit them in vitro, rat C6 astroglia-like cells were treated with cocaine (2-4 mM for 1h) and assayed for alterations in gross cell morphology, cytoplasmic vacuolation, viability, reactive oxygen species (ROS) generation, glutathione (GSH) levels, cell membrane integrity, F-actin cytoskeleton, and histone methylation. We report here that all of the above identified features are significantly altered by cocaine, and may collectively represent the key pathology underlying acute toxicity-mediated death of astroglia-like cells. Pretreatment of the cells with the clinically available antioxidant N-acetyl cysteine (NAC, 5 mM for 30 min) inhibited these changes during subsequent application of cocaine and mitigated cocaine-induced toxicity. Despite repeated cocaine exposure, NAC pretreated cells remained highly viable and post NAC treatment also increased viability of cocaine treated cells to a smaller yet significant level. We show further that this alleviation by NAC is mediated through an increase in GSH levels in the cells. These findings, coupled with the fact that astrocytes maintain neuronal integrity, suggest that compounds which target and mitigate these early toxic changes in astrocytes could have a potentially broad therapeutic role in cocaine-induced CNS damage. JF - PloS one AU - Badisa, Ramesh B AU - Kumar, Sanjay S AU - Mazzio, Elizabeth AU - Haughbrook, Rasheda D AU - Allen, John R AU - Davidson, Michael W AU - Fitch-Pye, Cheryl A AU - Goodman, Carl B AD - College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, Florida, United States of America. ; Department of Biomedical Science, College of Medicine, Florida State University, Tallahassee, Florida, United States of America. ; Department of Biology, Florida A&M University, Tallahassee, Florida, United States of America. ; National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, United States of America. ; Department of Biological Science, Florida State University, Tallahassee, Florida, United States of America. Y1 - 2015 PY - 2015 DA - 2015 SP - 1 VL - 10 IS - 1 KW - Antioxidants KW - 0 KW - Histones KW - Reactive Oxygen Species KW - Glutathione KW - GAN16C9B8O KW - Cocaine KW - I5Y540LHVR KW - Acetylcysteine KW - WYQ7N0BPYC KW - Index Medicus KW - Rats KW - Reactive Oxygen Species -- metabolism KW - Animals KW - Cell Survival -- drug effects KW - Cell Membrane -- drug effects KW - Glutathione -- metabolism KW - Histones -- drug effects KW - Methylation KW - Cell Line KW - Cytoskeleton -- drug effects KW - Antioxidants -- pharmacology KW - Astrocytes -- drug effects KW - Cocaine -- toxicity KW - Acetylcysteine -- pharmacology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1652419522?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=PloS+one&rft.atitle=N-acetyl+cysteine+mitigates+the+acute+effects+of+cocaine-induced+toxicity+in+astroglia-like+cells.&rft.au=Badisa%2C+Ramesh+B%3BKumar%2C+Sanjay+S%3BMazzio%2C+Elizabeth%3BHaughbrook%2C+Rasheda+D%3BAllen%2C+John+R%3BDavidson%2C+Michael+W%3BFitch-Pye%2C+Cheryl+A%3BGoodman%2C+Carl+B&rft.aulast=Badisa&rft.aufirst=Ramesh&rft.date=2015-01-01&rft.volume=10&rft.issue=1&rft.spage=e0114285&rft.isbn=&rft.btitle=&rft.title=PloS+one&rft.issn=1932-6203&rft_id=info:doi/10.1371%2Fjournal.pone.0114285 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-02-09 N1 - Date created - 2015-01-25 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Am J Pathol. 1989 Jul;135(1):85-91 [2774060] Neurotoxicology. 1993 Spring;14(1):19-22 [8361674] Neuroscience. 1993 Nov;57(2):467-72 [7509470] Neurochem Res. 1989 Oct;14(10):941-7 [2575233] Nature. 1994 Jun 30;369(6483):707-8 [8008062] Glia. 1994 Jun;11(2):191-200 [7927647] J Neurosci. 1996 Feb 1;16(3):877-85 [8558256] Forensic Sci Int. 2000 Jan 24;108(1):61-6 [10697780] J Submicrosc Cytol Pathol. 2000 Jan;32(1):111-6 [10877109] Prog Neurobiol. 2000 Dec;62(6):649-71 [10880854] Expert Opin Investig Drugs. 2000 Apr;9(4):747-64 [11060707] Trends Pharmacol Sci. 2001 Sep;22(9):456-8 [11543872] Neuroscience. 2002;110(1):1-6 [11882367] Ann N Y Acad Sci. 2002 Jun;965:487-96 [12105124] Phytother Res. 2003 May;17(5):472-6 [12748981] Science. 1968 Jul 26;161(3839):370-1 [4873531] Brain Res. 1974 Dec 20;82(1):77-89 [4373142] Circulation. 1990 Mar;81(3):1012-6 [2306813] Postgrad Med J. 1990 Aug;66(778):659-61 [2217036] Neuron. 1992 Jun;8(6):1191-204 [1610570] Circulation. 1993 Sep;88(3):876-83 [7689042] Metab Brain Dis. 2005 Sep;20(3):205-17 [16167198] Neurochem Res. 2005 May;30(5):603-11 [16176063] Neurosurg Focus. 2005 Oct 15;19(4):E1 [16241103] Toxicology. 2006 Jan 5;217(1):54-62 [16242230] Nat Rev Neurosci. 2006 Jan;7(1):41-53 [16371949] Am J Addict. 2006 Jan-Feb;15(1):105-10 [16449100] J Psychiatry Neurosci. 2006 Jan;31(1):32-7 [16496033] Nat Neurosci. 2006 Apr;9(4):519-25 [16501568] Toxicology. 2006 Jun 1;223(1-2):113-26 [16647178] Brain Res. 2006 May 17;1089(1):44-54 [16638611] Curr Opin Investig Drugs. 2006 Jul;7(7):619-24 [16869114] Toxicol Appl Pharmacol. 2006 Oct 15;216(2):263-73 [16814338] Mol Pharmacol. 2006 Nov;70(5):1726-34 [16908598] Proc Natl Acad Sci U S A. 2006 Oct 24;103(43):15782-7 [17043231] Neurotoxicology. 2007 Jul;28(4):886-91 [17498806] J Biomed Sci. 2008 Mar;15(2):215-26 [17922255] Am J Cardiovasc Drugs. 2009;9(3):177-96 [19463023] Psychiatry Res. 2009 Aug 15;168(3):173-80 [19233481] Science. 2010 Jan 8;327(5962):213-6 [20056891] Neurochem Res. 2010 Feb;35(2):288-97 [19757036] J Cereb Blood Flow Metab. 2010 Apr;30(4):734-8 [20104233] Int J Mol Med. 2011 Feb;27(2):243-8 [21125209] Neuron. 2011 Aug 25;71(4):656-70 [21867882] J Immunol. 2012 May 15;188(10):5132-41 [22504638] Int J Mol Med. 2012 Sep;30(3):687-92 [22735768] PLoS Comput Biol. 2012;8(7):e1002610 [22844238] J Ethnopharmacol. 1981 Mar-May;3(2-3):353-66 [7242115] Eur J Anaesthesiol. 1984 Sep;1(3):293-7 [6549535] Clin Pharmacol Ther. 1985 Sep;38(3):318-24 [4028628] J Forensic Sci. 1987 Mar;32(2):303-12 [3572327] Science. 1987 Sep 4;237(4819):1219-23 [2820058] J Cell Biol. 1989 Jan;108(1):141-51 [2910876] Anal Biochem. 1988 Dec;175(2):408-13 [3239770] J Neurosci. 1999 Feb 15;19(4):1284-93 [9952406] Free Radic Biol Med. 2004 Dec 1;37(11):1790-801 [15528038] J Inherit Metab Dis. 2013 May;36(3):437-49 [23609350] PLoS One. 2013;8(5):e64372 [23691207] Hum Mol Genet. 2013 Aug 15;22(16):3296-305 [23604518] Int J Mol Med. 2013 Aug;32(2):497-502 [23708443] Mol Med Rep. 2014 Nov;10(5):2287-92 [25174449] Biomol Concepts. 2013 Feb;4(1):1-12 [25436561] J Neurosci. 1994 Apr;14(4):2260-71 [8158268] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1371/journal.pone.0114285 ER - TY - JOUR T1 - A data-driven approach to modeling the tripartite structure of multidrug resistance efflux pumps AN - 1642611794; 21189333 AB - Many bacterial pathogens are becoming increasingly resistant to antibiotic treatments, and a detailed understanding of the molecular basis of antibiotic resistance is critical for the development of next-generation approaches for combating bacterial infections. Studies focusing on pathogens have revealed the profile of resistance in these organisms to be due primarily to the presence of multidrug resistance efflux pumps: tripartite protein complexes which span the periplasm bridging the inner and outer membranes of Gram-negative bacteria. An atomic-level resolution tripartite structure remains imperative to advancing our understanding of the molecular mechanisms of pump function using both theoretical and experimental approaches. We develop a fast and consistent method for constructing tripartite structures which leverages existing data-driven models and provide molecular modeling approaches for constructing tripartite structures of multidrug resistance efflux pumps. Our modeling studies reveal that conformational changes in the inner membrane component responsible for drug translocation have limited impact on the conformations of the other pump components, and that two distinct models derived from conflicting experimental data are both consistent with all currently available measurements. Additionally, we investigate putative drug translocation pathways via geometric simulations based on the available crystal structures of the inner membrane pump component, AcrB, bound to two drugs which occupy distinct binding sites: doxorubicin and linezolid. These simulations suggest that smaller drugs may enter the pump through a channel from the cytoplasmic leaflet of the inner membrane, while both smaller and larger drug molecules may enter through a vestibule accessible from the periplasm. Proteins 2015; 83:46-65. copyright 2014 Wiley Periodicals, Inc. JF - Proteins: Structure, Function and Bioinformatics AU - Phillips, Joshua L AU - Gnanakaran, S AD - Theoretical Biology and Biophysics Group (T-6), Los Alamos National Laboratory, Los Alamos, New Mexico, 87545. Y1 - 2015/01// PY - 2015 DA - Jan 2015 SP - 46 EP - 65 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030 United States VL - 83 IS - 1 SN - 0887-3585, 0887-3585 KW - Biotechnology and Bioengineering Abstracts KW - Molecular modelling KW - Data processing KW - Outer membranes KW - Antibiotics KW - Pathogens KW - Infection KW - Doxorubicin KW - Protein structure KW - Gram-negative bacteria KW - Inner membranes KW - Crystal structure KW - Multidrug resistance KW - Bioinformatics KW - Linezolid KW - Translocation KW - periplasm KW - Drugs KW - Antibiotic resistance KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642611794?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proteins%3A+Structure%2C+Function+and+Bioinformatics&rft.atitle=A+data-driven+approach+to+modeling+the+tripartite+structure+of+multidrug+resistance+efflux+pumps&rft.au=Phillips%2C+Joshua+L%3BGnanakaran%2C+S&rft.aulast=Phillips&rft.aufirst=Joshua&rft.date=2015-01-01&rft.volume=83&rft.issue=1&rft.spage=46&rft.isbn=&rft.btitle=&rft.title=Proteins%3A+Structure%2C+Function+and+Bioinformatics&rft.issn=08873585&rft_id=info:doi/10.1002%2Fprot.24632 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Molecular modelling; Data processing; Outer membranes; Antibiotics; Pathogens; Infection; Doxorubicin; Protein structure; Inner membranes; Gram-negative bacteria; Crystal structure; Multidrug resistance; Bioinformatics; Drugs; periplasm; Translocation; Linezolid; Antibiotic resistance DO - http://dx.doi.org/10.1002/prot.24632 ER - TY - JOUR T1 - Radioiodine sorption/desorption and speciation transformation by subsurface sediments from the Hanford Site. AN - 1634723003; 25464040 AB - During the last few decades, considerable research efforts have been extended to identify more effective remediation treatment technologies to lower the (129)I concentrations to below federal drinking water standards at the Hanford Site (Richland, USA). Few studies have taken iodate into consideration, though recently iodate, instead of iodide, was identified as the major species in the groundwater of 200-West Area within the Hanford Site. The objective of this study was thus to quantify and understand aqueous radioiodine species transformations and uptake by three sediments collected from the semi-arid, carbonate-rich environment of the Hanford subsurface. All three sediments reduced iodate (IO3(-)) to iodide (I(-)), but the loamy-sand sediment reduced more IO3(-) (100% reduced within 7 days) than the two sand-textured sediments (∼20% reduced after 28 days). No dissolved organo-iodine species were observed in any of these studies. Iodate uptake Kd values ([Isolid]/[Iaq]; 0.8-7.6 L/kg) were consistently and appreciably greater than iodide Kd values (0-5.6 L/kg). Furthermore, desorption Kd values (11.9-29.8 L/kg) for both iodate and iodide were consistently and appreciably greater than uptake Kd values (0-7.6 L/kg). Major fractions of iodine associated with the sediments were unexpectedly strongly bound, such that only 0.4-6.6 % of the total sedimentary iodine could be exchanged from the surface with KCl solution, and 0-1.2% was associated with Fe or Mn oxides (weak NH2HCl/HNO3 extractable fraction). Iodine incorporated into calcite accounted for 2.9-39.4% of the total sedimentary iodine, whereas organic carbon (OC) is likely responsible for the residual iodine (57.1-90.6%) in sediments. The OC, even at low concentrations, appeared to be controlling iodine binding to the sediments, as it was found that the greater the OC concentrations in the sediments, the greater the values of uptake Kd, desorption Kd, and the greater residual iodine concentrations (non-exchangeable, non-calcite-incorporated and non-Mn, Fe-oxide associated). This finding is of particular interest because it suggests that even very low OC concentrations, <0.2%, may have an impact on iodine geochemistry. The findings that these sediments can readily reduce IO3(-), and that IO3(-) sorbs to a greater extent than I(-), sheds light into earlier unexplained Hanford field data that demonstrated increases in groundwater (127)I(-)/(127)IO3(-) ratios and a decrease groundwater (129)IO3(-) concentrations along a transect away from the point sources, where iodine was primarily introduced as IO3(-). While a majority of the radioiodine does not bind to these alkaline sediments, there is likely a second smaller iodine fraction in the Hanford subsurface that is strongly bound, presumably to the sediment OC (and carbonate) phases. This second fraction may have an impact on establishing remediation goals and performance assessment calculations. JF - Journal of environmental radioactivity AU - Xu, Chen AU - Kaplan, Daniel I AU - Zhang, Saijin AU - Athon, Matthew AU - Ho, Yi-Fang AU - Li, Hsiu-Ping AU - Yeager, Chris M AU - Schwehr, Kathleen A AU - Grandbois, Russell AU - Wellman, Dawn AU - Santschi, Peter H AD - Laboratory for Environmental and Oceanographic Research, Department of Marine Sciences, Texas A&M University, Building 3029, Galveston, TX 77551, USA. Electronic address: xuchen66@tamu.edu. ; Savannah River National Laboratory, Aiken, SC 29808, USA. ; Laboratory for Environmental and Oceanographic Research, Department of Marine Sciences, Texas A&M University, Building 3029, Galveston, TX 77551, USA. ; 29808 Los Alamos National Laboratory, Los Alamos, NM 87545, USA. ; Pacific Northwest National Laboratory, Richland, WA 99354, USA. Y1 - 2015/01// PY - 2015 DA - January 2015 SP - 43 EP - 55 VL - 139 KW - Carbonates KW - 0 KW - Iodine Radioisotopes KW - Index Medicus KW - Sorption KW - Iodide KW - Iodate KW - Organic carbon KW - Iodine KW - Carbonates -- analysis KW - Groundwater -- analysis KW - Geologic Sediments -- analysis KW - Iodine Radioisotopes -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1634723003?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+radioactivity&rft.atitle=Radioiodine+sorption%2Fdesorption+and+speciation+transformation+by+subsurface+sediments+from+the+Hanford+Site.&rft.au=Xu%2C+Chen%3BKaplan%2C+Daniel+I%3BZhang%2C+Saijin%3BAthon%2C+Matthew%3BHo%2C+Yi-Fang%3BLi%2C+Hsiu-Ping%3BYeager%2C+Chris+M%3BSchwehr%2C+Kathleen+A%3BGrandbois%2C+Russell%3BWellman%2C+Dawn%3BSantschi%2C+Peter+H&rft.aulast=Xu&rft.aufirst=Chen&rft.date=2015-01-01&rft.volume=139&rft.issue=&rft.spage=43&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+radioactivity&rft.issn=1879-1700&rft_id=info:doi/10.1016%2Fj.jenvrad.2014.09.012 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-08-19 N1 - Date created - 2014-12-08 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.jenvrad.2014.09.012 ER - TY - JOUR T1 - Micro-crack formation in direct methanol fuel cell electrodes AN - 1642279340; 20888781 AB - This study focuses on the micro-crack formation of Nafion(R)-based membrane electrode assemblies (MEAs) after extended direct methanol fuel cell (DMFC) operation. All electrodes, both with metal-black and carbon-supported catalysts, contain some micro-cracks initially; the area covered by these cracks increases both in the anode and cathode after 100-hours of DMFC test. X-ray tomography shows an increase in the crack area in both anode and cathode that correlates with methanol feed concentration and methanol crossover. The MEAs with carbon-supported catalysts and thicker membrane are more resistant to the formation of micro-cracks compared to those with metal-black catalysts and thinner membrane, respectively. The impact of the micro-crack formation on cell performance and durability is limited over the 100-hour DMFC operation, with the long-term impact remaining unknown. JF - Journal of Power Sources AU - Li, Qing AU - Spernjak, Dusan AU - Zelenay, Piotr AU - Kim, Yu Seung AD - Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA; Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA Y1 - 2014/12/20/ PY - 2014 DA - 2014 Dec 20 SP - 561 EP - 569 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 271 SN - 0378-7753, 0378-7753 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Direct methanol fuel cell KW - Performance degradation KW - Micro-cracks KW - X-ray tomography KW - Long-term stability KW - Microcracks KW - Membranes KW - Formations KW - Methyl alcohol KW - Electrodes KW - Cracks KW - Catalysts KW - Catalysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642279340?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=Micro-crack+formation+in+direct+methanol+fuel+cell+electrodes&rft.au=Li%2C+Qing%3BSpernjak%2C+Dusan%3BZelenay%2C+Piotr%3BKim%2C+Yu+Seung&rft.aulast=Li&rft.aufirst=Qing&rft.date=2014-12-20&rft.volume=271&rft.issue=&rft.spage=561&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/10.1016%2Fj.jpowsour.2014.08.036 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2015-05-04 DO - http://dx.doi.org/10.1016/j.jpowsour.2014.08.036 ER - TY - JOUR T1 - Accurate analysis of shallowly implanted solar wind ions by SIMS backside depth profiling AN - 1668229517; 2015-029525 AB - A method to quantitatively determine the fluences of shallowly-implanted solar wind ions returned to Earth by the Genesis Discovery mission is described. Through backside depth-profiling, we recover nearly complete depth profiles of implanted solar wind for several nonvolatile elements, including Mg, Al, Ca, Cr, and, to a lesser extent, Na, in silicon targets that collected bulk solar wind and solar wind from specific velocity regimes. We also determine the fluences of the volatile elements C, N, and O in silicon targets that collected bulk solar wind. By the use of appropriately calibrated ion implanted standards, fluences as low as 2 X 10 (super 10) atoms cm (super - 2) can be determined with precision and accuracy typically in the few percent range. Specific approaches to sample preparation, sputtering artifacts during depth profiling by secondary ion mass spectrometry, and quantification including the production of ion implant standards are discussed. Abstract Copyright (2014) Elsevier, B.V. JF - Chemical Geology AU - Heber, Veronika S AU - McKeegan, Kevin D AU - Burnett, Donald S AU - Duprat, Jean AU - Guan, Yunbin AU - Jurewicz, Amy J G AU - Olinger, Chad T AU - Smith, Stephen P Y1 - 2014/12/18/ PY - 2014 DA - 2014 Dec 18 SP - 61 EP - 73 PB - Elsevier, Amsterdam VL - 390 SN - 0009-2541, 0009-2541 KW - alkaline earth metals KW - magnesium KW - Genesis Mission KW - ion probe data KW - solar wind KW - mass spectra KW - cosmochemistry KW - volatiles KW - metals KW - mathematical methods KW - spectra KW - chemical composition KW - accuracy KW - 04:Extraterrestrial geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229517?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Accurate+analysis+of+shallowly+implanted+solar+wind+ions+by+SIMS+backside+depth+profiling&rft.au=Heber%2C+Veronika+S%3BMcKeegan%2C+Kevin+D%3BBurnett%2C+Donald+S%3BDuprat%2C+Jean%3BGuan%2C+Yunbin%3BJurewicz%2C+Amy+J+G%3BOlinger%2C+Chad+T%3BSmith%2C+Stephen+P&rft.aulast=Heber&rft.aufirst=Veronika&rft.date=2014-12-18&rft.volume=390&rft.issue=&rft.spage=61&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2014.10.003 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 38 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-08-13 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - accuracy; alkaline earth metals; chemical composition; cosmochemistry; Genesis Mission; ion probe data; magnesium; mass spectra; mathematical methods; metals; solar wind; spectra; volatiles DO - http://dx.doi.org/10.1016/j.chemgeo.2014.10.003 ER - TY - JOUR T1 - Characterization of cores from an in situ recovery mined uranium deposit in Wyoming; implications for post-mining restoration AN - 1668229070; 2015-029523 AB - In-situ recovery (ISR) of uranium (U) from sandstone-type roll-front deposits is a technology that involves the injection of solutions that consist of ground water fortified with oxygen and carbonate to promote the oxidative dissolution of U, which is pumped to recovery facilities located at the surface that capture the dissolved U and recycle the treated water. The ISR process alters the geochemical conditions in the subsurface creating conditions that are more favorable to the migration of uranium and other metals associated with the uranium deposit. There is a lack of clear understanding of the impact of ISR mining on the aquifer and host rocks of the post-mined site and the fate of residual U and other metals within the mined ore zone. We performed detailed petrographic, mineralogical, and geochemical analyses of several samples taken from about 7 m of core of the formerly the ISR-mined Smith Ranch-Highland uranium deposit in Wyoming. We show that previously mined cores contain significant residual uranium (U) present as coatings on pyrite and carbonaceous fragments. Coffinite was identified in three samples. Core samples with higher organic (> 1 wt.%) and clay (> 6-17 wt.%) contents yielded higher (super 234) U/ (super 238) U activity ratios (1.0-1.48) than those with lower organic and clay fractions. The ISR mining was inefficient in mobilizing U from the carbonaceous materials, which retained considerable U concentrations (374-11,534 ppm). This is in contrast with the deeper part of the ore zone, which was highly depleted in U and had very low (super 234) U/ (super 238) U activity ratios. This probably is due to greater contact with the lixiviant (leaching solution) during ISR mining. EXAFS analyses performed on grains with the highest U and Fe concentrations reveal that Fe is present in a reduced form as pyrite and U occurs mostly as U(IV) complexed by organic matter or as U(IV) phases of carbonate complexes. Moreover, U-O distances of approximately 2.05 Aa were noted, indicating the potential formation of other poorly defined U(IV/VI) species. We also noted a small contribution from UO at 1.79 Aa, which indicates that U is partially oxidized. There is no apparent U-S or U-Fe interaction in any of the U spectra analyzed. However, SEM analysis of thin sections prepared from the same core material reveals surficial U associated with pyrite which is probably a minor fraction of the total U present as thin coatings on the surface of pyrite. Our data show the presence of different structurally variable uranium forms associated with the mined cores. U associated with carbonaceous materials is probably from the original U mobilization that accumulated in the organic matter-rich areas under reducing conditions during shallow burial diagenesis. U associated with pyrite represents a small fraction of the total U and was likely deposited as a result of chemical reduction by pyrite. Our data suggest that areas rich in carbonaceous materials had limited exposure to the lixiviant solution, continue to be reducing, and still hold significant U resources. Because of their limited access to fluid flow, these areas might not contribute significantly to post-mining U release or attenuation. Areas with pyrite that are accessible to fluids seem to be more reactive and could act as reductants and facilitate U reduction and accumulation, limiting its migration. Abstract Copyright (2014) Elsevier, B.V. JF - Chemical Geology AU - WoldeGabriel, G AU - Boukhalfa, H AU - Ware, S D AU - Cheshire, M AU - Reimus, P AU - Heikoop, J AU - Conradson, S D AU - Batuk, O AU - Havrilla, G AU - House, B AU - Simmons, A AU - Clay, J AU - Basu, A AU - Christensen, J N AU - Brown, S T AU - DePaolo, D J Y1 - 2014/12/18/ PY - 2014 DA - 2014 Dec 18 SP - 32 EP - 45 PB - Elsevier, Amsterdam VL - 390 SN - 0009-2541, 0009-2541 KW - X-ray diffraction data KW - reclamation KW - characterization KW - roll-type deposits KW - mass spectra KW - Smith Ranch Mine KW - attenuation KW - Powder River basin KW - in situ KW - pollutants KW - electron microscopy data KW - Converse County Wyoming KW - migration of elements KW - Wyoming KW - uranium ores KW - organic compounds KW - Highland Mine KW - metal ores KW - petrography KW - pyrite KW - uranium KW - mobilization KW - strontium KW - SEM data KW - United States KW - mineral deposits, genesis KW - isotopes KW - environmental analysis KW - ground water KW - radioactive isotopes KW - major elements KW - chemical reactions KW - sediments KW - X-ray fluorescence spectra KW - spectra KW - chemical composition KW - water pollution KW - alkaline earth metals KW - acid mine drainage KW - isotope ratios KW - pollution KW - recovery KW - aquifers KW - ICP mass spectra KW - sandstone-type deposits KW - metals KW - U-238/U-234 KW - sulfides KW - actinides KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229070?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Characterization+of+cores+from+an+in+situ+recovery+mined+uranium+deposit+in+Wyoming%3B+implications+for+post-mining+restoration&rft.au=WoldeGabriel%2C+G%3BBoukhalfa%2C+H%3BWare%2C+S+D%3BCheshire%2C+M%3BReimus%2C+P%3BHeikoop%2C+J%3BConradson%2C+S+D%3BBatuk%2C+O%3BHavrilla%2C+G%3BHouse%2C+B%3BSimmons%2C+A%3BClay%2C+J%3BBasu%2C+A%3BChristensen%2C+J+N%3BBrown%2C+S+T%3BDePaolo%2C+D+J&rft.aulast=WoldeGabriel&rft.aufirst=G&rft.date=2014-12-18&rft.volume=390&rft.issue=&rft.spage=32&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2014.10.009 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 63 N1 - Document feature - illus. incl. 5 tables, sketch map N1 - Last updated - 2015-04-02 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - acid mine drainage; actinides; alkaline earth metals; aquifers; attenuation; characterization; chemical composition; chemical reactions; Converse County Wyoming; electron microscopy data; environmental analysis; ground water; Highland Mine; ICP mass spectra; in situ; isotope ratios; isotopes; major elements; mass spectra; metal ores; metals; migration of elements; mineral deposits, genesis; mobilization; organic compounds; petrography; pollutants; pollution; Powder River basin; pyrite; radioactive isotopes; reclamation; recovery; roll-type deposits; sandstone-type deposits; sediments; SEM data; Smith Ranch Mine; spectra; strontium; sulfides; U-238/U-234; United States; uranium; uranium ores; water pollution; Wyoming; X-ray diffraction data; X-ray fluorescence spectra DO - http://dx.doi.org/10.1016/j.chemgeo.2014.10.009 ER - TY - JOUR T1 - Eruption dynamics of CO (sub 2) -driven cold-water geysers; Crystal, Tenmile Geysers in Utah and Chimayo Geyser in New Mexico AN - 1692744197; 2015-059836 AB - The CO (sub 2) bubble volume fraction, eruption velocity, flash depth and mass emission of CO (sub 2) were determined from multiple wellbore CO (sub 2) -driven cold-water geysers (Crystal and Tenmile geysers, in Utah and Chimayo geyser in New Mexico). At shallow depths the bubble volume fraction ranges from 0 to 0.8, eruption velocities range from 2 to 20 m/s and flash depths are predominately shallow ranging from 5 to 40 m below the surface. Annual emission of CO (sub 2) is estimated to be (4.77 + or - 1.92) X 10 (super 3) , (6.17 + or - 1.73) X 10 (super 1) , (6.54 + or - 0.57) X 10 (super 1) t/yr for Crystal, Tenmile and Chimayo geysers, respectively. These estimates are coherent with Burnside et al. (2013) showing that the rate of CO (sub 2) leakage from wellbores is greater than fault-parallel or diffuse CO (sub 2) leakage. The geyser plumbing geometry consists of a vertical wellbore which allows for the upward migration of CO (sub 2) -rich fluids due to artesian conditions. The positive feedback system of a CO (sub 2) -driven eruption occurs within the well. Active inflow of CO (sub 2) into the regional aquifers through faulted bedrock allows geysering to persist for decades. Crystal geyser erupts for over 24 h at a time, highlighting the potential for a wellbore in a natural environment to reach relatively steady-state high velocity discharge. Mitigating high velocity CO (sub 2) -driven discharge from wellbores will, however, be easier than mitigating diffuse leakage from faults or into groundwater systems. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Watson, Z T AU - Han, Weon Shik AU - Keating, Elizabeth H AU - Jung, Na-Hyun AU - Lu, Meng Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 SP - 272 EP - 284 PB - Elsevier, Amsterdam VL - 408 SN - 0012-821X, 0012-821X KW - United States KW - Tenmile Geyser KW - Chimayo Geyser KW - New Mexico KW - seepage KW - temperature KW - ground water KW - carbon dioxide KW - artesian waters KW - mitigation KW - dynamics KW - Crystal Geyser KW - geysers KW - discharge KW - faults KW - migration KW - carbon sequestration KW - numerical models KW - bubbles KW - fluid flow KW - depth KW - aquifers KW - boreholes KW - eruptions KW - steady-state processes KW - theoretical models KW - periodicity KW - Utah KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692744197?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+and+Planetary+Science+Letters&rft.atitle=Eruption+dynamics+of+CO+%28sub+2%29+-driven+cold-water+geysers%3B+Crystal%2C+Tenmile+Geysers+in+Utah+and+Chimayo+Geyser+in+New+Mexico&rft.au=Watson%2C+Z+T%3BHan%2C+Weon+Shik%3BKeating%2C+Elizabeth+H%3BJung%2C+Na-Hyun%3BLu%2C+Meng&rft.aulast=Watson&rft.aufirst=Z&rft.date=2014-12-15&rft.volume=408&rft.issue=&rft.spage=272&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.10.001 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 57 N1 - Document feature - illus. incl. 2 tables, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-07-02 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - aquifers; artesian waters; boreholes; bubbles; carbon dioxide; carbon sequestration; Chimayo Geyser; Crystal Geyser; depth; discharge; dynamics; eruptions; faults; fluid flow; geysers; ground water; migration; mitigation; New Mexico; numerical models; periodicity; seepage; steady-state processes; temperature; Tenmile Geyser; theoretical models; United States; Utah DO - http://dx.doi.org/10.1016/j.epsl.2014.10.001 ER - TY - CPAPER T1 - Plasma mixing and transport caused by the three-dimensional development of the Kelvin-Helmholtz instability T2 - 47th American Geophysical Union Fall Meeting AN - 1651745176; 6333023 JF - 47th American Geophysical Union Fall Meeting AU - Nakamura, Takuma AU - Daughton, William AU - Karimabadi, Homayoun AU - Eriksson, Stefan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Kelvin-helmholtz instability UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745176?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Plasma+mixing+and+transport+caused+by+the+three-dimensional+development+of+the+Kelvin-Helmholtz+instability&rft.au=Nakamura%2C+Takuma%3BDaughton%2C+William%3BKarimabadi%2C+Homayoun%3BEriksson%2C+Stefan&rft.aulast=Nakamura&rft.aufirst=Takuma&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Spatially Resolved Projections of Carbon Releases from Thawing Polygonal Tundra T2 - 47th American Geophysical Union Fall Meeting AN - 1651745034; 6332784 JF - 47th American Geophysical Union Fall Meeting AU - Painter, Scott AU - Coon, Ethan AU - Atchley, Adam AU - Harp, Dylan AU - Moulton, John AU - Shelef, Eitan AU - Xu, Chonggang AU - Wilson, Cathy Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Carbon KW - Tundra KW - Thawing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745034?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Spatially+Resolved+Projections+of+Carbon+Releases+from+Thawing+Polygonal+Tundra&rft.au=Painter%2C+Scott%3BCoon%2C+Ethan%3BAtchley%2C+Adam%3BHarp%2C+Dylan%3BMoulton%2C+John%3BShelef%2C+Eitan%3BXu%2C+Chonggang%3BWilson%2C+Cathy&rft.aulast=Painter&rft.aufirst=Scott&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Moment Tensor Descriptions for Simulated Explosions of the Source Physics Experiment (SPE) T2 - 47th American Geophysical Union Fall Meeting AN - 1651744244; 6334643 JF - 47th American Geophysical Union Fall Meeting AU - Rougier, Esteban AU - Knight, Earl AU - Yang, Xiaoning AU - Patton, Howard Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Explosions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651744244?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Moment+Tensor+Descriptions+for+Simulated+Explosions+of+the+Source+Physics+Experiment+%28SPE%29&rft.au=Rougier%2C+Esteban%3BKnight%2C+Earl%3BYang%2C+Xiaoning%3BPatton%2C+Howard&rft.aulast=Rougier&rft.aufirst=Esteban&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Modeling the Impenetrable Barrier to Inward Transport of Ultra-relativistic Radiation Belt Electrons T2 - 47th American Geophysical Union Fall Meeting AN - 1651743879; 6331279 JF - 47th American Geophysical Union Fall Meeting AU - Tu, Weichao AU - Cunningham, Gregory AU - Chen, Yue AU - Baker, Daniel AU - Henderson, Michael AU - Reeves, Geoffrey Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Barriers KW - Radiation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651743879?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+the+Impenetrable+Barrier+to+Inward+Transport+of+Ultra-relativistic+Radiation+Belt+Electrons&rft.au=Tu%2C+Weichao%3BCunningham%2C+Gregory%3BChen%2C+Yue%3BBaker%2C+Daniel%3BHenderson%2C+Michael%3BReeves%2C+Geoffrey&rft.aulast=Tu&rft.aufirst=Weichao&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - A Morphology Independent Methodology for Quantifying River Planform Change and Characteristics from Remotely Sensed Imagery T2 - 47th American Geophysical Union Fall Meeting AN - 1651742279; 6333389 JF - 47th American Geophysical Union Fall Meeting AU - Rowland, Joel AU - Gangodagamage, Chandana AU - Shelef, Eitan AU - Pope, Paul AU - Brumby, Steven AU - Wilson, Cathy Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Rivers KW - Fluvial morphology KW - Remote sensing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742279?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=A+Morphology+Independent+Methodology+for+Quantifying+River+Planform+Change+and+Characteristics+from+Remotely+Sensed+Imagery&rft.au=Rowland%2C+Joel%3BGangodagamage%2C+Chandana%3BShelef%2C+Eitan%3BPope%2C+Paul%3BBrumby%2C+Steven%3BWilson%2C+Cathy&rft.aulast=Rowland&rft.aufirst=Joel&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Recent Advances in Infrasound Science for National Security Applications T2 - 47th American Geophysical Union Fall Meeting AN - 1651742085; 6333190 JF - 47th American Geophysical Union Fall Meeting AU - Arrowsmith, Stephen AU - Blom, Philip AU - Marcillo, Omar AU - Whitaker, Rodney Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Security KW - Infrasound UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742085?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Recent+Advances+in+Infrasound+Science+for+National+Security+Applications&rft.au=Arrowsmith%2C+Stephen%3BBlom%2C+Philip%3BMarcillo%2C+Omar%3BWhitaker%2C+Rodney&rft.aulast=Arrowsmith&rft.aufirst=Stephen&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Accelerating global forest mortality T2 - 47th American Geophysical Union Fall Meeting AN - 1651742022; 6333625 JF - 47th American Geophysical Union Fall Meeting AU - McDowell, Nathan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Mortality KW - Forests UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742022?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Accelerating+global+forest+mortality&rft.au=McDowell%2C+Nathan&rft.aulast=McDowell&rft.aufirst=Nathan&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Progress and Challenges in Coupled Ice-Sheet/Climate Modeling with CESM T2 - 47th American Geophysical Union Fall Meeting AN - 1651741975; 6333674 JF - 47th American Geophysical Union Fall Meeting AU - Fyke, Jeremy AU - Sacks, William AU - Vizcaino, Miren AU - Lipscomb, William AU - Price, Stephen Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Climate UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741975?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Progress+and+Challenges+in+Coupled+Ice-Sheet%2FClimate+Modeling+with+CESM&rft.au=Fyke%2C+Jeremy%3BSacks%2C+William%3BVizcaino%2C+Miren%3BLipscomb%2C+William%3BPrice%2C+Stephen&rft.aulast=Fyke&rft.aufirst=Jeremy&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - What Can We Get Out of Acoustic Coda from Explosions? T2 - 47th American Geophysical Union Fall Meeting AN - 1651741509; 6333193 JF - 47th American Geophysical Union Fall Meeting AU - Marcillo, Omar AU - Arrowsmith, Stephen AU - Whitaker, Rodney Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Acoustics KW - Explosions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741509?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=What+Can+We+Get+Out+of+Acoustic+Coda+from+Explosions%3F&rft.au=Marcillo%2C+Omar%3BArrowsmith%2C+Stephen%3BWhitaker%2C+Rodney&rft.aulast=Marcillo&rft.aufirst=Omar&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Spatiotemporal Structure of a Coupled Continuum-Granular Earthquake Experiment T2 - 47th American Geophysical Union Fall Meeting AN - 1651740876; 6333526 JF - 47th American Geophysical Union Fall Meeting AU - Ecke, Robert AU - Geller, Drew AU - Backhaus, Scott Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Earthquakes KW - Seismic activity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740876?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Spatiotemporal+Structure+of+a+Coupled+Continuum-Granular+Earthquake+Experiment&rft.au=Ecke%2C+Robert%3BGeller%2C+Drew%3BBackhaus%2C+Scott&rft.aulast=Ecke&rft.aufirst=Robert&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Linking Inundation Patterns and Dynamics in a Permafrost Landscape to Hydrologic, Thermal, Biogeochemical and Ecosystem Processes T2 - 47th American Geophysical Union Fall Meeting AN - 1651740858; 6331026 JF - 47th American Geophysical Union Fall Meeting AU - Wilson, Cathy AU - Hinzman, Larry AU - Iwahana, Go AU - Lara, Mark AU - Liljedahl, Anna AU - Painter, Scott AU - Romanovsky, Vladimir AU - Wullschleger, Stan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Biogeochemistry KW - Landscape KW - Permafrost UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740858?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Linking+Inundation+Patterns+and+Dynamics+in+a+Permafrost+Landscape+to+Hydrologic%2C+Thermal%2C+Biogeochemical+and+Ecosystem+Processes&rft.au=Wilson%2C+Cathy%3BHinzman%2C+Larry%3BIwahana%2C+Go%3BLara%2C+Mark%3BLiljedahl%2C+Anna%3BPainter%2C+Scott%3BRomanovsky%2C+Vladimir%3BWullschleger%2C+Stan&rft.aulast=Wilson&rft.aufirst=Cathy&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - An Emerging Role for Numerical Modelling in Wildfire Behavior Research: Explorations, Explanations, and Hypothesis Development T2 - 47th American Geophysical Union Fall Meeting AN - 1651740776; 6330617 JF - 47th American Geophysical Union Fall Meeting AU - Linn, Rodman Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Wildfire KW - Mathematical models KW - Exploration UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740776?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=An+Emerging+Role+for+Numerical+Modelling+in+Wildfire+Behavior+Research%3A+Explorations%2C+Explanations%2C+and+Hypothesis+Development&rft.au=Linn%2C+Rodman&rft.aulast=Linn&rft.aufirst=Rodman&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Adventures in STEM: Lessons in Water Chemistry From Elementary School to Graduate School T2 - 47th American Geophysical Union Fall Meeting AN - 1651740392; 6329134 JF - 47th American Geophysical Union Fall Meeting AU - Dittrich, Timothy Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Schools KW - Water Chemistry KW - Water chemistry KW - Graduate schools UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740392?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Adventures+in+STEM%3A+Lessons+in+Water+Chemistry+From+Elementary+School+to+Graduate+School&rft.au=Dittrich%2C+Timothy&rft.aulast=Dittrich&rft.aufirst=Timothy&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - A Study on the Effect of Fracture Aperture Variability on Advective Transport in aFractured Shale using Discrete Fracture Network Modeling T2 - 47th American Geophysical Union Fall Meeting AN - 1651740213; 6329346 JF - 47th American Geophysical Union Fall Meeting AU - Makedonska, Nataliia AU - Karra, Satish AU - Painter, Scott AU - Viswanathan, Hari AU - Gable, Carl Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Fractures KW - Shale UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740213?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=A+Study+on+the+Effect+of+Fracture+Aperture+Variability+on+Advective+Transport+in+aFractured+Shale+using+Discrete+Fracture+Network+Modeling&rft.au=Makedonska%2C+Nataliia%3BKarra%2C+Satish%3BPainter%2C+Scott%3BViswanathan%2C+Hari%3BGable%2C+Carl&rft.aulast=Makedonska&rft.aufirst=Nataliia&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Enhanced techniques for the measurement of ultra-low level (pg and fg) actinide analysis by ICP-MS for forensic and geologic applications T2 - 47th American Geophysical Union Fall Meeting AN - 1651739960; 6334432 JF - 47th American Geophysical Union Fall Meeting AU - Pollington, Anthony AU - Kinman, William AU - Hanson, Susan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Forensic science KW - Geology KW - Actinides UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651739960?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Enhanced+techniques+for+the+measurement+of+ultra-low+level+%28pg+and+fg%29+actinide+analysis+by+ICP-MS+for+forensic+and+geologic+applications&rft.au=Pollington%2C+Anthony%3BKinman%2C+William%3BHanson%2C+Susan&rft.aulast=Pollington&rft.aufirst=Anthony&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - PIC simulations of Whistler Wave Generation and Electron Scattering Initialized by Plasma Conditions from the RAM-SCB Model T2 - 47th American Geophysical Union Fall Meeting AN - 1651739787; 6330006 JF - 47th American Geophysical Union Fall Meeting AU - Yu, Yiqun AU - Delzanno, Gian AU - Jordanova, Vania AU - Zhao, Lei AU - Peng, Bo AU - Markidis, Stefano Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Simulation KW - Waves KW - Wave generation KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651739787?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=PIC+simulations+of+Whistler+Wave+Generation+and+Electron+Scattering+Initialized+by+Plasma+Conditions+from+the+RAM-SCB+Model&rft.au=Yu%2C+Yiqun%3BDelzanno%2C+Gian%3BJordanova%2C+Vania%3BZhao%2C+Lei%3BPeng%2C+Bo%3BMarkidis%2C+Stefano&rft.aulast=Yu&rft.aufirst=Yiqun&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Onset and Evolution of Magnetic Reconnection in Line-Tied Systems T2 - 47th American Geophysical Union Fall Meeting AN - 1651739217; 6330516 JF - 47th American Geophysical Union Fall Meeting AU - Daughton, William AU - Akcay, Cihan AU - Billey, Zach AU - Finn, John AU - Zweibel, Ellen AU - Gekelman, Walter Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Evolution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651739217?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Onset+and+Evolution+of+Magnetic+Reconnection+in+Line-Tied+Systems&rft.au=Daughton%2C+William%3BAkcay%2C+Cihan%3BBilley%2C+Zach%3BFinn%2C+John%3BZweibel%2C+Ellen%3BGekelman%2C+Walter&rft.aulast=Daughton&rft.aufirst=William&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - The Role of the Ring Current in Inner Magnetosphere Cross-Energy Coupling T2 - 47th American Geophysical Union Fall Meeting AN - 1651739107; 6330657 JF - 47th American Geophysical Union Fall Meeting AU - Jordanova, Vania Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Geophysics KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651739107?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=The+Role+of+the+Ring+Current+in+Inner+Magnetosphere+Cross-Energy+Coupling&rft.au=Jordanova%2C+Vania&rft.aulast=Jordanova&rft.aufirst=Vania&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Consistent Predictions of Future Forest Mortality T2 - 47th American Geophysical Union Fall Meeting AN - 1651738610; 6329016 JF - 47th American Geophysical Union Fall Meeting AU - McDowell, Nathan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Prediction KW - Mortality KW - Forests UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738610?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Consistent+Predictions+of+Future+Forest+Mortality&rft.au=McDowell%2C+Nathan&rft.aulast=McDowell&rft.aufirst=Nathan&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Multi-point observations of energetic particle injection deep into the inner magnetosphere: Implications for the ring current and radiation belts T2 - 47th American Geophysical Union Fall Meeting AN - 1651737896; 6329538 JF - 47th American Geophysical Union Fall Meeting AU - Reeves, Geoffrey Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Radiation KW - Particulates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737896?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Multi-point+observations+of+energetic+particle+injection+deep+into+the+inner+magnetosphere%3A+Implications+for+the+ring+current+and+radiation+belts&rft.au=Reeves%2C+Geoffrey&rft.aulast=Reeves&rft.aufirst=Geoffrey&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - A Historical Forcing Ice Sheet Model Validation Framework for Greenland T2 - 47th American Geophysical Union Fall Meeting AN - 1651737283; 6334276 JF - 47th American Geophysical Union Fall Meeting AU - Price, Stephen Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Historical account KW - Ice KW - Greenland KW - Glaciation KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737283?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=A+Historical+Forcing+Ice+Sheet+Model+Validation+Framework+for+Greenland&rft.au=Price%2C+Stephen&rft.aulast=Price&rft.aufirst=Stephen&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Critical Watersheds: Climate Change, Tipping Points, and Energy-Water Impacts T2 - 47th American Geophysical Union Fall Meeting AN - 1651736888; 6334837 JF - 47th American Geophysical Union Fall Meeting AU - Middleton, Richard AU - Brown, Michael AU - Coon, Ethan AU - Linn, Rodman AU - McDowell, Nathan AU - Painter, Scott AU - Xu, Chonggang Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Climatic changes KW - Watersheds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651736888?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Critical+Watersheds%3A+Climate+Change%2C+Tipping+Points%2C+and+Energy-Water+Impacts&rft.au=Middleton%2C+Richard%3BBrown%2C+Michael%3BCoon%2C+Ethan%3BLinn%2C+Rodman%3BMcDowell%2C+Nathan%3BPainter%2C+Scott%3BXu%2C+Chonggang&rft.aulast=Middleton&rft.aufirst=Richard&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - JOUR T1 - Influence of late Pleistocene glaciations on the hydrogeology of the continental shelf offshore Massachusetts, USA AN - 1819896615; 2016-077700 AB - Multiple late Pleistocene glaciations that extended onto the continental shelf offshore Massachusetts, USA, may have emplaced as much as 100 km (super 3) of freshwater (salinity <5 ppt) in continental shelf sediments. To estimate the volume and extent of offshore freshwater, we developed a three-dimensional, variable-density model that couples fluid flow and heat and solute transport for the continental shelf offshore Massachusetts. The stratigraphy for our model is based on high-resolution, multichannel seismic data. The model incorporates the last 3 Ma of climate history by prescribing boundary conditions of sea level change and ice sheet extent and thickness. We incorporate new estimates of the maximum extent of a late Pleistocene ice sheet to near the shelf-slope break. Model results indicate that this late Pleistocene ice sheet was responsible for much of the emplaced freshwater. We predict that the current freshwater distribution may reach depths up to 500 meters below sea level and up to 30 km beyond Martha's Vineyard. The freshwater distribution is strongly dependent on the three-dimensional stratigraphy and ice sheet history. Our predictions improve our understanding of the distribution of offshore freshwater, a potential nonrenewable resource for coastal communities along recently glaciated margins. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Geochemistry, Geophysics, Geosystems - G3 AU - Siegel, Jacob AU - Person, Mark AU - Dugan, Brandon AU - Cohen, Denis AU - Lizarralde, Daniel AU - Gable, Carl Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 4651 EP - 4670 PB - American Geophysical Union and The Geochemical Society VL - 15 IS - 12 KW - United States KW - solute transport KW - glaciation KW - density KW - fresh water KW - ground water KW - upper Pleistocene KW - Cenozoic KW - transport KW - Massachusetts KW - Dukes County Massachusetts KW - geochemistry KW - coastal aquifers KW - Quaternary KW - numerical models KW - three-dimensional models KW - geophysical methods KW - Martha's Vineyard KW - multichannel methods KW - hydrochemistry KW - ice sheets KW - boundary conditions KW - seismic methods KW - aquifers KW - sea-level changes KW - Pleistocene KW - heat transfer KW - glacial geology KW - continental shelf KW - water resources KW - pore water KW - 24:Quaternary geology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819896615?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochemistry%2C+Geophysics%2C+Geosystems+-+G3&rft.atitle=Influence+of+late+Pleistocene+glaciations+on+the+hydrogeology+of+the+continental+shelf+offshore+Massachusetts%2C+USA&rft.au=Siegel%2C+Jacob%3BPerson%2C+Mark%3BDugan%2C+Brandon%3BCohen%2C+Denis%3BLizarralde%2C+Daniel%3BGable%2C+Carl&rft.aulast=Siegel&rft.aufirst=Jacob&rft.date=2014-12-01&rft.volume=15&rft.issue=12&rft.spage=4651&rft.isbn=&rft.btitle=&rft.title=Geochemistry%2C+Geophysics%2C+Geosystems+-+G3&rft.issn=1525-2027&rft_id=info:doi/10.1002%2F2014GC005569 L2 - http://g-cubed.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom | Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 64 N1 - Document feature - illus. incl. 5 tables, sketch map N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - aquifers; boundary conditions; Cenozoic; coastal aquifers; continental shelf; density; Dukes County Massachusetts; fresh water; geochemistry; geophysical methods; glacial geology; glaciation; ground water; heat transfer; hydrochemistry; ice sheets; Martha's Vineyard; Massachusetts; multichannel methods; numerical models; Pleistocene; pore water; Quaternary; sea-level changes; seismic methods; solute transport; three-dimensional models; transport; United States; upper Pleistocene; water resources DO - http://dx.doi.org/10.1002/2014GC005569 ER - TY - JOUR T1 - A mechanisms-based model for dynamic behavior and fracture of geomaterials AN - 1815672083; 2016-075074 AB - A mechanisms-based fracture model applicable to a broad class of earth and earth-like materials is presented. The key features the model captures are: (1) material anisotropy; (2) rate-sensitive directional fracture; (3) dilatational friction; (4) dynamic overstress in loading extremes, where the rate of supplied energy is not fully compensated by the rate of the energy redistribution and release and, lastly, (5) spatial stochasticity due to material heterogeneity. In comparison with more traditional phenomenological descriptions, the contribution of the proposed approach is the utilization of tensor representation theory; the theory is suitable for converting observed deformation and fracture mechanisms into a precise mathematical description of the material's behavior. Abstract Copyright (2014) Elsevier, B.V. JF - International Journal of Rock Mechanics and Mining Sciences (1997) AU - Zubelewicz, Alek AU - Rougier, E AU - Ostoja-Starzewski, M AU - Knight, E E AU - Bradley, C AU - Viswanathan, H S Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 277 EP - 282 PB - Elsevier, Oxford-New York VL - 72 SN - 1365-1609, 1365-1609 KW - density KW - microcracks KW - loading KW - elastic properties KW - viscoplastic materials KW - mathematical models KW - rock mechanics KW - cracks KW - stochastic processes KW - constitutive equations KW - brittleness KW - dilation KW - anisotropy KW - dynamic properties KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815672083?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.atitle=A+mechanisms-based+model+for+dynamic+behavior+and+fracture+of+geomaterials&rft.au=Zubelewicz%2C+Alek%3BRougier%2C+E%3BOstoja-Starzewski%2C+M%3BKnight%2C+E+E%3BBradley%2C+C%3BViswanathan%2C+H+S&rft.aulast=Zubelewicz&rft.aufirst=Alek&rft.date=2014-12-01&rft.volume=72&rft.issue=&rft.spage=277&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.issn=13651609&rft_id=info:doi/10.1016%2Fj.ijrmms.2014.09.015 L2 - http://www.sciencedirect.com/science/journal/13651609 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 22 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-01 N1 - CODEN - IJRMA2 N1 - SubjectsTermNotLitGenreText - anisotropy; brittleness; constitutive equations; cracks; density; dilation; dynamic properties; elastic properties; loading; mathematical models; microcracks; rock mechanics; stochastic processes; viscoplastic materials DO - http://dx.doi.org/10.1016/j.ijrmms.2014.09.015 ER - TY - JOUR T1 - Mesoscopic study of the formation of pseudomorphs with presence of chemical fluids AN - 1812210717; 2016-067950 AB - A numerical approach is developed to simulate the formation of pseudomorphs with presence of chemical fluids at the mesoscopic scale. This approach consists of the lattice Boltzmann method (LBM) for transport of chemical species in the pore space, a chemical reaction model including basic kinetics of the coupled dissolution and precipitation reactions, and a mesoscopic model for nucleation and crystal growth. Our study confirms the mechanism of the solution chemistry-driven interface-coupled dissolution-precipitation for the formation of pseudomorphs and identifies several sources for the generation of porosity in the pseudomorphs. We demonstrate that epitaxial precipitation is not necessary and random crystal growth may be more favorable for pseudomorphs. We show that the difference of precipitation barrier on the surface of the primary and secondary minerals should not be too large. Otherwise only the rim of the primary phase is roughly preserved. Copyright 2014 The Association of Korean Geoscience Societies and Springer-Verlag Berlin Heidelberg JF - Geosciences Journal (Seoul) AU - Chen, Li AU - Kang, Qinjun AU - Deng, Hailin AU - Carey, J William AU - Tao, Wenquan Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 469 EP - 475 PB - Association of Korean Geoscience Societies, Seoul VL - 18 IS - 4 SN - 1226-4806, 1226-4806 KW - numerical models KW - secondary minerals KW - physicochemical properties KW - fluid phase KW - crystal growth KW - equations KW - epitaxy KW - solution KW - simulation KW - porosity KW - pseudomorphism KW - chemical reactions KW - transport KW - precipitation KW - lattice Boltzmann method KW - interfaces KW - reactive transport KW - 01A:General mineralogy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812210717?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geosciences+Journal+%28Seoul%29&rft.atitle=Mesoscopic+study+of+the+formation+of+pseudomorphs+with+presence+of+chemical+fluids&rft.au=Chen%2C+Li%3BKang%2C+Qinjun%3BDeng%2C+Hailin%3BCarey%2C+J+William%3BTao%2C+Wenquan&rft.aulast=Chen&rft.aufirst=Li&rft.date=2014-12-01&rft.volume=18&rft.issue=4&rft.spage=469&rft.isbn=&rft.btitle=&rft.title=Geosciences+Journal+%28Seoul%29&rft.issn=12264806&rft_id=info:doi/10.1007%2Fs12303-014-0009-7 L2 - http://www.springer.com/earth+sciences+and+geography/journal/12303 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 29 N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2016-08-18 N1 - SubjectsTermNotLitGenreText - chemical reactions; crystal growth; epitaxy; equations; fluid phase; interfaces; lattice Boltzmann method; numerical models; physicochemical properties; porosity; precipitation; pseudomorphism; reactive transport; secondary minerals; simulation; solution; transport DO - http://dx.doi.org/10.1007/s12303-014-0009-7 ER - TY - JOUR T1 - Turbulent plasma transport across the Earth's low-latitude boundary layer AN - 1773824563; PQ0002651749 AB - The Kelvin-Helmholtz instability is a key process for the transport of solar wind plasma into the Earth's magnetosphere when the interplanetary magnetic field (IMF) is northward. Previous kinetic simulations for symmetric layers have demonstrated that the flow vortices compress the magnetopause current layer and induce magnetic reconnection, leading to the rapid streaming of solar wind plasma into the vortices along newly reconnected field lines. Using fully kinetic 3-D simulations, we demonstrate that the inherent density asymmetry across the boundary layer leads to a spectrum of oblique interchange instabilities along the magnetospheric side of the vortices. These secondary instabilities give rise to turbulence, which transports the solar wind plasma originally stored within the flow vortices deep into the magnetosphere. Simple estimates suggest that this turbulent transport may contribute significantly to the formation of the Earth's low-latitude boundary layer and the cold-dense plasma sheet during prolonged periods of northward IMF. Key Points * We performed 3-D fully kinetic simulations modeling the Earth's magnetopause * The KH instability drives turbulence leading to efficient solar wind transport * The estimated transport rate explains the formation of the LLBL and CDPS JF - Geophysical Research Letters AU - Nakamura, TKM AU - Daughton, W AD - Computational Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 8704 EP - 8712 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 41 IS - 24 SN - 0094-8276, 0094-8276 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Flow KW - Kelvin-helmholtz instability KW - Boundary Layers KW - turbulence KW - Vortexes KW - Wind fields KW - Magnetopause KW - Magnetosphere KW - Turbulent boundary layer KW - Wind KW - Vortices KW - Simulation Analysis KW - Solar wind KW - Density KW - Magnetopause currents KW - Kelvin-Helmholtz instability KW - Interplanetary magnetic field KW - Solar wind turbulence KW - Magnetic fields KW - Numerical simulations KW - Kinetics KW - Boundary layers KW - Magnetic reconnection KW - Instability KW - Q2 09262:Methods and instruments KW - SW 0810:General KW - M2 523.62:Solar Wind, Interplanetary Plasma (523.62) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773824563?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Turbulent+plasma+transport+across+the+Earth%27s+low-latitude+boundary+layer&rft.au=Nakamura%2C+TKM%3BDaughton%2C+W&rft.aulast=Nakamura&rft.aufirst=TKM&rft.date=2014-12-01&rft.volume=41&rft.issue=24&rft.spage=8704&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL061952 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Kelvin-helmholtz instability; Magnetic fields; Vortices; Boundary layers; Turbulent boundary layer; Wind fields; Magnetosphere; Numerical simulations; Solar wind; Magnetopause currents; Magnetic reconnection; Kelvin-Helmholtz instability; Vortexes; Interplanetary magnetic field; Instability; Solar wind turbulence; Magnetopause; Flow; Simulation Analysis; Density; Kinetics; Boundary Layers; turbulence; Wind DO - http://dx.doi.org/10.1002/2014GL061952 ER - TY - JOUR T1 - The ChemCam LIBS and imaging instrument suite on the Curiosity Mars rover, and terrestrial field testing of LIBS AN - 1769967929; 2016-017792 AB - The Curiosity rover that landed on Mars in 2012 includes an instrument suite consisting of a laser-induced breakdown spectrometer (LIBS) and a remote micro-imager (RMI). The LIBS is effectively the first Mars microprobe, as its interrogation region is 0.35-0.5 mm in diameter; it can access targets up to 7 m from the rover. The LIBS pulsed laser excites atoms and ions from the target, creating a plasma that emits light at characteristic wavelengths. When calibrated, LIBS provides quantitative elemental abundances. The elements observed on Mars include H, Li, O, F, Na, Mg, Al, Si, S, Cl, Ca, Ti, Cr, Mn, Fe, Zn, Rb, Sr, Ba. The first few laser shots clear the surface of dust, allowing unobscured analyses of the targets. Within the first two years of operation ChemCam has returned > 150,000 spectra from > 4,000 locations along the rover traverse. The RMI is the highest resolution (0.04 mrad) remote imager on the rover and provides context before/after images of the LIBS targets as well as long-distance stand-alone imagery. The ChemCam LIBS instrument concept was developed based on laboratory LIBS instrumentation. For terrestrial field work ChemCam's design with its unshielded laser beam is an eye safety hazard. However, hand-held devices with closed laser-beam designs have been developed. In order to provide a realistic field test prior to the launch of the rover the ChemCam team fielded a backpack LIBS system featuring a shielded laser beam. The system was calibrated using the same 66 geological standards used by the ChemCam instrument prior to flight. During the field test, data was sent remotely to a team back at Los Alamos, effectively imitating operations on Mars and data analysis on the ground. The ground team successfully reported accurate results, identifying the site as rich in kaolinite clay soils. JF - American Geophysical Union Fall Meeting AU - Wiens, R C AU - Clegg, S M AU - Barefield, James, II AU - Maurice, Sylvestre AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11A EP - 3737 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769967929?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+ChemCam+LIBS+and+imaging+instrument+suite+on+the+Curiosity+Mars+rover%2C+and+terrestrial+field+testing+of+LIBS&rft.au=Wiens%2C+R+C%3BClegg%2C+S+M%3BBarefield%2C+James%2C+II%3BMaurice%2C+Sylvestre%3BAnonymous&rft.aulast=Wiens&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Crustal and mantle structure of the North America continent using SEM based full waveform seismic tomography and trans-dimensional inversion AN - 1769963805; 2016-018392 AB - The construction of a 3D upper mantle continental scale tomographic model using long period waveform data involves the choice of a reference model, which is generally smooth in the vertical direction, including only the Moho and transition zone discontinuities. The resulting 3D model therefore cannot explicitly account for strong lateral variations in features such as the mid-lithospheric boundary or the lithosphere-asthenosphere boundary, when it is sharp, so that trade-offs between smooth volumetric heterogeneity and the topography of such boundaries cannot be resolved. We present the first results of a time domain waveform tomography of the north American (NA) continent obtained using the spectral element method (SEM) for wavefield computations and a 3D starting model that contains upper mantle discontinuities determined in a prior step from receiver function analysis. The model is constructed using a procedure that consists of 5 steps: 1) We apply k-means cluster analysis to a recent global tomographic model to regionalize NA into three main provinces (Oceanic, transitional, continental). 2) We calculate 1D Vs and radial anisotropy (Xi) profiles at 26 stations deployed in the NA continent using a trans-dimensional Markov-chain algorithm. Here, we jointly invert three datasets; (i) Rayleigh and Love phase velocity dispersion, (ii) Rayleigh and Love group velocity dispersion, (iii) Averaged seismograms for calculating receiver functions using the cross-convolution method (Bodin et al., 2014). 3) A 1D model is obtained for Vs and Xi in each of the 3 provinces by averaging the models obtained in 2) for that province and these layered 1D models are connected laterally using smoothing operators based on inter-station distance to generate a layered 3D starting model. 4) We calculate smooth equivalent models of Vs and Xi using the homogenization procedure of Capdeville et al. (2013) 5) We perform a SEM based waveform tomographic inversion of our regional distance database obtaining smooth 3D velocity perturbations which are then added to the layered 3D starting model. After several iterations, the model obtained includes lateral variations in the depth of significant boundaries, constrained by high frequency data, as well as lateral volumetric velocity variations, constrained by the longer period waveforms. JF - American Geophysical Union Fall Meeting AU - Calo, Marco AU - Bodin, Thomas AU - Romanowicz, Barbara A AU - Clouzet, Pierre AU - Larmat, Carene S AU - Maceira, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S31E EP - 05 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963805?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Crustal+and+mantle+structure+of+the+North+America+continent+using+SEM+based+full+waveform+seismic+tomography+and+trans-dimensional+inversion&rft.au=Calo%2C+Marco%3BBodin%2C+Thomas%3BRomanowicz%2C+Barbara+A%3BClouzet%2C+Pierre%3BLarmat%2C+Carene+S%3BMaceira%2C+M%3BAnonymous&rft.aulast=Calo&rft.aufirst=Marco&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - SHERLOC; scanning habitable environments with Raman & luminescence for organics & chemicals, an investigation for 2020 AN - 1769963624; 2016-017882 AB - The Scanning Habitable Environments with Raman & Luminescence for Organics & Chemicals SHERLOC investigation was recently selected for the Mars 2020 integrated payload. SHERLOC enables non-contact, spatially resolved, and highly sensitivity detection and characterization of organics and minerals in the Martian surface and near subsurface. SHERLOC is an arm-mounted, Deep UV (DUV) resonance Raman and fluorescence spectrometer utilizing a 248.6-nm DUV laser and 50 micron spot size. The laser is integrated to an autofocusing/scanning optical system, and co-boresighted to a context imager with a spatial resolution of 30 mu m. SHERLOC operates over a 7 X 7 mm area through use of an internal scanning mirror. The 500 micron depth of view in conjunction with the MAHLI heritage autofocus mechanisms enables arm placements from 48 + or -12.5 mm above natural or abraded surfaces without the need for rover arm repositioning/movement. Additionally, borehole interiors to a depth of approximately 25 mm, at angles from normal incidence to + or -20 degrees, can be analyzed. Deep UV induced native fluorescence is very sensitive to condensed carbon and aromatic organics, enabling detection at or below 10-6 w/w (1 ppm) at <100 mu m spatial scales. SHERLOC's deep UV resonance Raman enables detection and classification of aromatic and aliphatic organics with sensitivities of 10-2 to below 10-4 w/w at <50 mu m spatial scales. In addition to organics, the deep UV Raman enables detection and classification of minerals relevant to aqueous chemistry with grain sizes below 20 mu m grains. The instrument goals are to assess past aqueous history, detect the presence and preservation of potential biosignatures, and to support selection of return samples. To do this, SHERLOC will measure CHNOPS-containing mineralogy, measure the distribution and type of organics preserved at the surface, and correlate them to textural features. JF - American Geophysical Union Fall Meeting AU - Beegle, Luther W AU - Bhartia, R AU - Deflores, L P AU - Asher, S A AU - Burton, A S AU - Clegg, S M AU - Conrad, P G AU - Edgett, K S AU - Ehlmann, B L AU - Langenhorst, F AU - Fries, M AU - Nealson, K H AU - Popp, J AU - Sobron, P AU - Steele, A AU - Wiens, R C AU - Williford, K H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P24A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963624?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=SHERLOC%3B+scanning+habitable+environments+with+Raman+%26amp%3B+luminescence+for+organics+%26amp%3B+chemicals%2C+an+investigation+for+2020&rft.au=Beegle%2C+Luther+W%3BBhartia%2C+R%3BDeflores%2C+L+P%3BAsher%2C+S+A%3BBurton%2C+A+S%3BClegg%2C+S+M%3BConrad%2C+P+G%3BEdgett%2C+K+S%3BEhlmann%2C+B+L%3BLangenhorst%2C+F%3BFries%2C+M%3BNealson%2C+K+H%3BPopp%2C+J%3BSobron%2C+P%3BSteele%2C+A%3BWiens%2C+R+C%3BWilliford%2C+K+H%3BAnonymous&rft.aulast=Beegle&rft.aufirst=Luther&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Design of an optimal microseismic monitoring network; synthetic study for the Kimberlina CO2 storage demonstration site AN - 1769963594; 2016-018285 AB - As part of the U.S. DOE initiative, National Risk Assessment Partnership (NRAP) to develop quantitative risk assessment methodologies for carbon capture, utilization and storage (CCUS), we explore the design of an optimal microseismic monitoring network using synthetic earthquake data for the Kimberlina CCUS pilot site in California. The overpressure field calculated by fluid flow modeling within a reservoir confined by two fault zones in the vicinity of the Kimberlina injection well is input to induced earthquake simulations carried out using the code RSQSim (Dieterich and Richards-Dinger, Seismol. Res. Let., 2012). Velocity and attenuation structures developed using geological data for the reservoir overburden and underburden are used for numerical wave propagation modeling to calculate surface ground motion time series produced by the simulated microseismic events. We then invert the time series data using a fat-ray double-difference tomography method to locate the events, and compare the results with the known locations. The tomography method is applied to time series calculated for different surface recording network configurations to study the resulting variations in event locations uncertainties, and to assess an optimal network for cost-effective, long-term monitoring for CCUS. JF - American Geophysical Union Fall Meeting AU - Huang, L AU - Chen, T AU - Lin, Y AU - Foxall, William AU - Hutchings, L J AU - Bachmann, C E AU - Daley, T M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S31A EP - 4372 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963594?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Design+of+an+optimal+microseismic+monitoring+network%3B+synthetic+study+for+the+Kimberlina+CO2+storage+demonstration+site&rft.au=Huang%2C+L%3BChen%2C+T%3BLin%2C+Y%3BFoxall%2C+William%3BHutchings%2C+L+J%3BBachmann%2C+C+E%3BDaley%2C+T+M%3BAnonymous&rft.aulast=Huang&rft.aufirst=L&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Seismic assessment of a temporary deployment in the Kingdom of Bhutan using double; difference tomography AN - 1769963522; 2016-018264 AB - The Kingdom of Bhutan is located on the eastern edge of the Himalaya range. As an area of a major continental-continental collision, Bhutan Himalaya has been subject to a considerable amount of deformation and transpression, and it contains features of the five major shear zones of the Himalayas. Extensive seismic analysis of the region, however, is lacking due to sparse coverage and complexity of its crustal structure. We examine seismic event data from a temporary seismic network deployed in the Kingdom of Bhutan (2002-2003) using the double difference tomographic inversion technique TomoFDD, which allows for the joint inversion of event relocations and seismic velocity structure. Our primary focus is on approximately 200 regional events surrounding the five-station network. The events are located between 86 degrees and 100 degrees E longitude, and 18 degrees and 31 degrees N latitude, and with depths between 10 and 400 km. To extend our model area, we also incorporate GSN stations LSA, KMI, and CHTO. Prior analysis of this dataset consisted of event location, relocation, and 1D velocity modeling. We leverage on previous studies and build a new 3D seismic velocity model of the crust and upper mantle underneath the Bhutan region to gain further insight on the seismicity and crustal assessment. JF - American Geophysical Union Fall Meeting AU - Perez, C A AU - Velasco, A A AU - Syracuse, E M AU - Maceira, M AU - Zhang, H J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S23C EP - 4552 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963522?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Seismic+assessment+of+a+temporary+deployment+in+the+Kingdom+of+Bhutan+using+double%3B+difference+tomography&rft.au=Perez%2C+C+A%3BVelasco%2C+A+A%3BSyracuse%2C+E+M%3BMaceira%2C+M%3BZhang%2C+H+J%3BAnonymous&rft.aulast=Perez&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Double-difference waveform inversion with a modified total-variation regularization scheme; application to time-lapse walkaway VSP data AN - 1769963487; 2016-018291 AB - Quantifying reservoir changes is crucial for safe and long-term geologic carbon storage. We develop a new double-difference waveform inversion method with a modified total-variation regularization scheme to jointly invert time-lapse seismic data for geophysical properties changes in reservoirs/target monitoring regions. Our new method avoids the non-differentiability of the total-variation regularization scheme, and improves the robustness of waveform inversion. We use time-lapse seismic data for joint inversion to reduce inversion artifacts outside target monitoring regions. Two walkaway vertical seismic profiling (VSP) datasets were acquired at the SACROC enhanced-oil-recovery (EOR) field in Texas in 2008 and 2009 for monitoring CO2 injection and migration. We apply our new double-difference waveform inversion method to the SACROC time-lapse VSP datasets. Our joint inversion result reveals a region with seismic-wave velocities lower than the other regions in the reservoir. This velocity decrease is caused by CO2 injection and migration. JF - American Geophysical Union Fall Meeting AU - Lin, Y AU - Huang, L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S31A EP - 4378 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963487?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Double-difference+waveform+inversion+with+a+modified+total-variation+regularization+scheme%3B+application+to+time-lapse+walkaway+VSP+data&rft.au=Lin%2C+Y%3BHuang%2C+L%3BAnonymous&rft.aulast=Lin&rft.aufirst=Y&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - A detailed source model for the Mw9.0 Tohoku-oki earthquake reconciling geodesy, seismology and tsunami records AN - 1769963447; 2016-018398 AB - The March 11, 2011, Mw9.0 Tohoku-Oki earthquake was recorded by an exceptionally large amount of diverse data. Many analyses of this mega-earthquake have been made based on different types of these data. In this work, we aim to reconcile them into a single better-resolved source model. To do so, we first present a kinematic 3D finite-fault slip joint inversion including an extended amount of complementary data: teleseismic, strong-motion, high-rate GPS, static GPS and tsunami records. The inversion fits all the data very well and reveals a patchy slip distribution with large-slip (up to 64 m) mostly located up-dip of the hypocenter and near the trench. We compare this co-seismic slip model and its time evolution to geophysical observations independent of the earthquake such as the seismicity before and after the earthquake, slab velocity anomalies imaged by tomography, rheological properties of the megathrust revealed by drilling and geological observations in the footwall. In an attempt to reconcile all these observations, we propose a rupture scenario in which the rupture started as a magnitude 7 like earthquake, in a region where events of this size are common. After 40-50s, the rupture reached an asperity locked for a very long time -- possibly since the 869 Jogan earthquake -- inducing enough stress perturbation to cause its rupture. Its rupture released an enormous amount of stress and lowered the effective friction of the megathrust located up-dip, allowing the footwall to slip with negligible dynamic friction. This scenario would explain the absence of aftershocks in the footwall and the presence of a large normal fault branching from the megathrust to the surface, which is a mark of particularly low friction on the megathrust. This scenario is supported by a stress-drop distribution derived from our inversion, which reveals a very high stress-drop patch correlated with the normal fault and a slab heterogeneity imaged by tomography. JF - American Geophysical Union Fall Meeting AU - Bletery, Q AU - Sladen, A AU - Delouis, B AU - Vallee, M AU - Nocquet, J M AU - Rolland, Lucie AU - Jiang, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S31F EP - 03 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963447?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+detailed+source+model+for+the+Mw9.0+Tohoku-oki+earthquake+reconciling+geodesy%2C+seismology+and+tsunami+records&rft.au=Bletery%2C+Q%3BSladen%2C+A%3BDelouis%2C+B%3BVallee%2C+M%3BNocquet%2C+J+M%3BRolland%2C+Lucie%3BJiang%2C+J%3BAnonymous&rft.aulast=Bletery&rft.aufirst=Q&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Fluorine observations by ChemCam; a tracer of magmatic and hydrothermal processes in the Martian crust AN - 1769963397; 2016-017869 AB - The ChemCam LIBS instrument on the Curiosity rover has observed fluorine in more than 60 locations along the traverse. These are the first fluorine detections on Mars, although the SNC meteorites contain moderate amounts of F, suggesting that is present in the Mars crust. The detection limit is < 0.4 wt % but requires the simultaneous presence of Ca in the LIBS plasma (Gaft et al., 2014). Approximately one fourth of the observations were made on conglomerate clasts in the Bradbury Rise area near the landing site, and another third were made in sediments in the Kimberley area (around sol 550). In these targets F was correlated with K, Al, and Si enrichments; in the Kimberley area they were also correlated with Li enrichments in the 10s of ppm. The most likely mineral host in these settings is muscovite and potentially also biotite. In other observations the fluorine is correlated with high Ca; P was observed above the relatively high LIBS detection limit in some targets, suggesting the presence of fluorapatites. Chlorine was not found in association with fluorine. A number of these observations were made in the rocks around the aeolian drift (around sol 60). The presence of the implied apatites and mica minerals has strong implications for the petrologic environment in which these phases were formed. We will discuss the origin and possible processes that led to the presence of these fluorine-bearing targets. JF - American Geophysical Union Fall Meeting AU - Clegg, S M AU - Forni, Olivier AU - Wiens, R C AU - Toplis, M J AU - Gasnault, Olivier AU - Sautter, V AU - Mangold, N AU - Maurice, S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23E EP - 08 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963397?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Fluorine+observations+by+ChemCam%3B+a+tracer+of+magmatic+and+hydrothermal+processes+in+the+Martian+crust&rft.au=Clegg%2C+S+M%3BForni%2C+Olivier%3BWiens%2C+R+C%3BToplis%2C+M+J%3BGasnault%2C+Olivier%3BSautter%2C+V%3BMangold%2C+N%3BMaurice%2C+S%3BAnonymous&rft.aulast=Clegg&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Remote geochemical and mineralogical analysis with SuperCam on the Mars 2020 Rover and on Earth AN - 1769963287; 2016-017806 AB - The SuperCam instrument selected for the Mars 2020 rover is the integration of remote Laser-Induced Breakdown Spectroscopy (LIBS), Raman spectroscopy, Time-Resolved Fluorescence, Visible and Infrared (VISIR) Reflectance Spectroscopy, and a color Remote Micro-Imager (RMI). The SuperCam instrument is based on the ChemCam architecture that includes a 1064 nm Nd:YAG laser and telescope in the mast and a suite of three spectrometers in the body connected by an optical fiber. The telescope on the mast will be used to focus the 1064 nm laser and generate a LIBS plasma from which the elemental composition will be determined up to a 7 m standoff distance. Some of the 1064 nm laser will be directed through a doubling crystal to produce 532 nm light for Raman mineralogical analysis out to 12 m from the mast. The ChemCam visible and near infrared (VNIR) spectrometer will be replaced with a transmission spectrometer and intensified charge coupled device (ICCD) that is designed to maximize the Raman mineralogical sensitivity. This transmission spectrometer and ICCD was also designed to collect time-resolved fluorescence spectra that can distinguish short lived organic fluorescence from long lived inorganic signatures. The SuperCam instrument also includes a Visible and Infrared (VISIR) Reflectance Spectrometer (400 - 900 nm, 1.3 - 2.6 mu m) designed to remotely detect minerals. Finally, the ChemCam black and white RMI that is integrated into the telescope will be replaced with a color RMI with the same spatial resolution to provide context images of the samples probed with the SuperCam spectrometers. In this paper, some of the geochemical and mineralogical laboratory tests will be presented to highlight the SuperCam capabilities under both terrestrial and Mars conditions. JF - American Geophysical Union Fall Meeting AU - Clegg, S M AU - Wiens, R C AU - Maurice, Sylvestre AU - Gasnault, Olivier AU - Forni, Olivier AU - Sharma, S K AU - Misra, A K AU - Rull, F AU - Johnson, J R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11A EP - 3753 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963287?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Remote+geochemical+and+mineralogical+analysis+with+SuperCam+on+the+Mars+2020+Rover+and+on+Earth&rft.au=Clegg%2C+S+M%3BWiens%2C+R+C%3BMaurice%2C+Sylvestre%3BGasnault%2C+Olivier%3BForni%2C+Olivier%3BSharma%2C+S+K%3BMisra%2C+A+K%3BRull%2C+F%3BJohnson%2C+J+R%3BAnonymous&rft.aulast=Clegg&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Stable isotope measurements of carbon dioxide, methane, and hydrogen sulfide gas using frequency modulation spectroscopy AN - 1769963198; 2016-018294 AB - Seepage from enhanced oil recovery, carbon storage, and natural gas sites can emit trace gases such as carbon dioxide, methane, and hydrogen sulfide. Trace gas emission at these locations demonstrate unique light stable isotope signatures that provide information to enable source identification of the material. Light stable isotope detection through surface monitoring, offers the ability to distinguish between trace gases emitted from sources such as, biological (fertilizers and wastes), mineral (coal or seams), or liquid organic systems (oil and gas reservoirs). To make light stable isotope measurements, we employ the ultra-sensitive technique, frequency modulation spectroscopy (FMS). FMS is an absorption technique with sensitivity enhancements approximately 100-1000x more than standard absorption spectroscopy with the advantage of providing stable isotope signature information. We have developed an integrated in situ (point source) system that measures carbon dioxide, methane and hydrogen sulfide with isotopic resolution and enhanced sensitivity. The in situ instrument involves the continuous collection of air and records the stable isotope ratio for the gas being detected. We have included in-line flask collection points to obtain gas samples for validation of isotopic concentrations using our in-house isotope ratio mass spectroscopy (IRMS). We present calibration curves for each species addressed above to demonstrate the sensitivity and accuracy of the system. We also show field deployment data demonstrating the capabilities of the system in making live dynamic measurements from an active source. JF - American Geophysical Union Fall Meeting AU - Nowak-Lovato, K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S31A EP - 4381 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963198?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Stable+isotope+measurements+of+carbon+dioxide%2C+methane%2C+and+hydrogen+sulfide+gas+using+frequency+modulation+spectroscopy&rft.au=Nowak-Lovato%2C+K%3BAnonymous&rft.aulast=Nowak-Lovato&rft.aufirst=K&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Regional and global crustal context of soil and rock chemistry from ChemCam and APXS at Gale crater AN - 1769963179; 2016-018053 AB - The chemistry of rocks and soils analyzed by Curiosity represent a diverse population including mafic and felsic compositions. The data from Gale Crater can be compared with the accumulated data for martian materials from other landing sites, the Gamma Ray Spectrometer (GRS) experiment on the Mars Odyssey Spacecraft, and the data for Martian meteorites. Variations in the CaO/Al2O3 ratio in primitive igneous rocks can provide a fundamental signature of crustal formation on Mars. Abundances of other elements like Fe in the surface rocks can reflect later differentiation effects. Comparing the chemistry of Gale samples with other Martian data must take into account the different geochemical components in the samples. The most important distinction is between the volatile elements including H, C, Cl, S, and the lithophile elements including Al, Si, Fe, Mn, Ca, Na, Mg, etc.. The large enrichments of the volatile elements SO3, Cl, and H2O in the soils may represent contributions from volcanic aerosols or other local sources of volatiles. Alteration and transport of fluid mobile major elements by aqueous or hydrothermal processes could complicate the estimation of crustal abundances of elements such as Ca but early results suggest little or no chemical fractionation attributable to alteration. Other clues to the role of fluids can come from the ChemCam data for the highly fluid mobile elements lithium and manganese. Regional comparisons of chemistry only make sense when considering the absolute abundances and elemental ratios within the different component classes. The use of elemental ratios avoids the problem of the correction required to get volatile-free abundance data for comparison of GRS data with meteorites and landing site rocks measured by the ChemCam Laser Induced Breakdown Spectroscopy (LIBS) experiment and Alpha Particle X-ray Spectrometer (APXS). The huge size of the GRS footprint makes it especially difficult to make the required corrections. Eventually data from the whole suite of experiments on Curiosity will allow us to improve volatile corrections for GRS observations of Gale Crater and the rest of Mars. JF - American Geophysical Union Fall Meeting AU - Newsom, H E AU - Gordon, S AU - Jackson, R AU - Agee, C B AU - Wiens, R C AU - Clegg, S M AU - Lanza, N AU - Cousin, A AU - Gasnault, Olivier AU - Meslin, P Y AU - Maurice, S AU - Forni, Olivier AU - McLennan, S M AU - Mangold, N AU - Sautter, V AU - Clark, B C AU - Anderson, R B AU - Gellert, R AU - Schmidt, M E AU - Ollila, A AU - Boynton, W V AU - Martin-Torres, J AU - Zorzano, M P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51E EP - 3987 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963179?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Regional+and+global+crustal+context+of+soil+and+rock+chemistry+from+ChemCam+and+APXS+at+Gale+crater&rft.au=Newsom%2C+H+E%3BGordon%2C+S%3BJackson%2C+R%3BAgee%2C+C+B%3BWiens%2C+R+C%3BClegg%2C+S+M%3BLanza%2C+N%3BCousin%2C+A%3BGasnault%2C+Olivier%3BMeslin%2C+P+Y%3BMaurice%2C+S%3BForni%2C+Olivier%3BMcLennan%2C+S+M%3BMangold%2C+N%3BSautter%2C+V%3BClark%2C+B+C%3BAnderson%2C+R+B%3BGellert%2C+R%3BSchmidt%2C+M+E%3BOllila%2C+A%3BBoynton%2C+W+V%3BMartin-Torres%2C+J%3BZorzano%2C+M+P%3BAnonymous&rft.aulast=Newsom&rft.aufirst=H&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Observations of high manganese layers by the Curiosity rover at the Kimberley, Gale crater, Mars AN - 1765881582; 2016-013901 AB - The Curiosity rover spent sols 606-630 analyzing an outcrop in a region dubbed the Kimberley. Three rock targets at this location were found to have Mn concentrations strongly elevated above that of martian primary crust: Stephen (sols 611, 619, 630), Neil (sol 619), and Mondooma (sol 625). Stephen and Neil are adjacent to one another and appear as more resistant, fin-like layers subparallel to sedimentary bedding, and are interpreted as bedding-parallel mineralized fractures. Mondooma is located in the same bedrock unit a few meters away and has a similar geological context. After dust cleaning by ChemCam, Stephen and Neil exhibited dark, shiny surfaces. The dust-cleared surface of Mondooma is also dark and exhibits an angular, shallow fracture pattern. ChemCam observations indicate high Mn concentrations nearly equal 20-40 wt% MnO) for all three targets in which Mn abundances are higher in the first shots and decrease systematically with succeeding shots (i.e. increasing depths). The Alpha Particle X-ray Spectrometer (APXS) also analyzed Stephen (sols 627, 629) and observed elevated manganese abundances ( nearly equal 4 wt% MnO) that are the highest detected by that instrument in Gale thus far. APXS data show that Stephen also exhibits relatively high Ni abundances ( nearly equal 1000 ppm) that correlate with Mn. The difference between the two instruments' measurements is likely due to differences in interaction volumes and footprint areas (1.7 cm APXS versus nearly equal 400 mu m ChemCam). In addition to these three high Mn targets, other fin-like features are observed throughout the unit. Based on morphology and chemistry, these thin Mn-rich fins likely represent fracture-filling authigenic minerals emplaced by secondary fluids percolating through the strata. The appearance and correlation between Mn and Ni strongly suggest the presence of Mn-oxide phase(s). Mn-oxides are important because they require extremely strong oxidants and sufficient volumes of liquid water to form. Environments of Mn cycling on Earth are uniformly habitable and Mn-oxides provide for the microbial respiration of a wide variety of reduced compounds. Thus, these results suggest that Mars may have hosted a broader range of habitable environments than previously recognized. JF - American Geophysical Union Fall Meeting AU - Lanza, Nina AU - Wiens, R C AU - Fischer, W W AU - Grotzinger, J P AU - Cousin, A AU - Rice, Melissa S AU - Clark, Ben C AU - Arvidson, R E AU - Hurowitz, Joel AU - Gellert, R AU - McLennan, Scott M AU - Maurice, Sylvestre AU - Mangold, Nicolas AU - Le Mouelic, Stephane AU - Anderson, R B AU - Nachon, Marion AU - Ollila, A AU - Schmidt, M E AU - Berger, J A AU - Blank, J G AU - Clegg, S M AU - Forni, Olivier AU - Hardgrove, C J AU - Hardy, Keian AU - Johnson, Jeffrey R AU - Melikechi, N AU - Newsom, H E AU - Sautter, V AU - Martin-Torres, Javier AU - Zorzano, M P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P34A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765881582?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Observations+of+high+manganese+layers+by+the+Curiosity+rover+at+the+Kimberley%2C+Gale+crater%2C+Mars&rft.au=Lanza%2C+Nina%3BWiens%2C+R+C%3BFischer%2C+W+W%3BGrotzinger%2C+J+P%3BCousin%2C+A%3BRice%2C+Melissa+S%3BClark%2C+Ben+C%3BArvidson%2C+R+E%3BHurowitz%2C+Joel%3BGellert%2C+R%3BMcLennan%2C+Scott+M%3BMaurice%2C+Sylvestre%3BMangold%2C+Nicolas%3BLe+Mouelic%2C+Stephane%3BAnderson%2C+R+B%3BNachon%2C+Marion%3BOllila%2C+A%3BSchmidt%2C+M+E%3BBerger%2C+J+A%3BBlank%2C+J+G%3BClegg%2C+S+M%3BForni%2C+Olivier%3BHardgrove%2C+C+J%3BHardy%2C+Keian%3BJohnson%2C+Jeffrey+R%3BMelikechi%2C+N%3BNewsom%2C+H+E%3BSautter%2C+V%3BMartin-Torres%2C+Javier%3BZorzano%2C+M+P%3BAnonymous&rft.aulast=Lanza&rft.aufirst=Nina&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Comparison of laser induced breakdown spectroscopy (LIBS) on Martian meteorite NWA 7034 to ChemCam observations at Gale crater, Mars AN - 1765879624; 2016-014028 AB - The ChemCam instrument on board the Mars Science Laboratory (MSL) Curiosity rover uses laser-induced breakdown spectroscopy (LIBS) to analyze rock and soil targets on Mars from up to 7 m away. The Nd:KGW laser can shoot up to 1000 shots at one location and profile up to 1 mm depth into a rock. Identical LIBS instrumentation is located at Los Alamos National Laboratory and was used to analyze Martian meteorite NWA 7034, a non-SNC basaltic breccia whose bulk composition matches the Martian surface. Initial LIBS analysis of NWA 7034 included observations on two basaltic clasts in the meteorite. Electron microprobe analysis (EPMA) was performed on the two clasts for comparison with elemental compositions measured using LIBS. The two instruments give similar compositions of major oxides within the error of both techniques. EPMA analysis was also completed on three light-toned clasts and a dark-toned clast in the meteorite. The light-toned clasts have Al/Si vs. (Fe+Mg)/Si compositions ranging from felsic to mafic, and the dark-toned clast shows a mafic composition. A Sammon's map was created to compare LIBS data for NWA 7034 and ChemCam targets Stark, Crestaurum, Link, Portage, Jake (sub M) , Mara, Thor (sub L) ake, Coronation, Pearson, and Prebble. This nonlinear statistical mapping technique is used for clustering assessment of LIBS data in two dimensions. The map shows NWA 7034 clustering in its own location, and the closest similar ChemCam rock targets are La (sub R) eine and Ashuamipi, which are both coarse grained targets that have a mafic component consistent with augite. The most similar ChemCam soil targets are the Crestaurum and Portage. Creation of maps with a greater number of targets will show more of the similarities between NWA 7034 and ChemCam target rocks and soils. Further analysis will compare NWA 7034 LIBS data, data from the paired meteorite NWA 7533, and a variety of ChemCam targets that are similar in morphology and texture. JF - American Geophysical Union Fall Meeting AU - Gordon, S AU - Newsom, H E AU - Agee, C B AU - Santos, A R AU - Clegg, S M AU - Wiens, R C AU - Lasue, J AU - Sautter, V AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P54B EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765879624?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Comparison+of+laser+induced+breakdown+spectroscopy+%28LIBS%29+on+Martian+meteorite+NWA+7034+to+ChemCam+observations+at+Gale+crater%2C+Mars&rft.au=Gordon%2C+S%3BNewsom%2C+H+E%3BAgee%2C+C+B%3BSantos%2C+A+R%3BClegg%2C+S+M%3BWiens%2C+R+C%3BLasue%2C+J%3BSautter%2C+V%3BAnonymous&rft.aulast=Gordon&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - ChemCam depth profiles at Gale crater to assess coating and alteration distribution and chemistry AN - 1765879548; 2016-013920 AB - Coating and rock alteration formation on Mars is constrained by both the availability of water and rock composition. Detection of these materials depends on the both formation rate and the rate of abrasion that these alteration products and coatings experience. ChemCam on the Curiosity rover can investigate coating/alteration formation and preservation by looking at chemical composition as a function of depth into the rock. ChemCam LIBS works by firing a laser focused to a 350 - 550 mm diameter spot that produces plasma from the rock. Spectra of elemental emission lines are recorded from 240-850 nm and used to determine the elemental composition of the rock. A chemical composition is generated from each individual spectrum. Each laser firing penetrates deeper into the rock allowing for a composition as a function of depth to be determined. By comparing geochemical trends from the beginning and end of the observations evidence for coatings and alteration can be assessed by geologic setting and rock type. Previous ChemCam work has identified Li variations (Ollila et al. 2014) and MnO coatings (Lanza et al. 2014) on a few rocks with high abundances of these elements. However this work is the first systematic assessment of alteration and coatings in the entire data set. From landing until Sol 583 there were 2,610 good quality ChemCam rock and outcrop observations. These measurements were assessed for internal elemental composition variability by the calculation of heterogeneity index. Only 7% (178) had positive internal heterogeneity. However, internal heterogeneity can be due to other factors besides coatings and alteration. Thick soil coverage and differential sampling of materials in coarse-grained rocks also produce positive heterogeneity indexes. The actual number of potential coatings at Gale is significantly lower. For most of Gale, current geochemical alteration rates are slower the rate of abrasion. This result is consistent with limited availability of water in the current epoch. Detailed analysis rocks with of potential alteration signatures and coatings will be undertaken to determine if there are materials that have been protected from abrasion. Limits on the rates of formation of coatings/alteration in the current epoch will be estimated and implications for water availability and habitability discussed. JF - American Geophysical Union Fall Meeting AU - Blaney, Diana L AU - Clegg, S M AU - Wiens, R C AU - Maurice, Sylvestre AU - Lanza, Nina L AU - Bridges, Nathan AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P41A EP - 3883 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765879548?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=ChemCam+depth+profiles+at+Gale+crater+to+assess+coating+and+alteration+distribution+and+chemistry&rft.au=Blaney%2C+Diana+L%3BClegg%2C+S+M%3BWiens%2C+R+C%3BMaurice%2C+Sylvestre%3BLanza%2C+Nina+L%3BBridges%2C+Nathan%3BAnonymous&rft.aulast=Blaney&rft.aufirst=Diana&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Felsic igneous rocks at Gale crater; a comparison with lithic clasts in NWA 7533 AN - 1765878940; 2016-014029 AB - Curiosity rover landed at Gale, an early Hesperian age crater formed within Noachian rocks. In Hummocky plain, more than half of the igneous floats rocks are highly alkaline rocks (Stolper et al. DOI: 101126/science.12239463, Schmidt et al. DOI: 10.1002/2013JE004481) and feldspar-bearing rocks (Sautter et al. DOI: 10.1002/2013JE00447). ChemCam observations at sub-millimeter scale show that these samples contain a significant feldspar component, either associated with LCP in gabbroic texture or with augite in effusive rocks defining an alkaline K-feldspar-bearing suite: basanite, trachy-andesite with porphyritic texture and syenitic rock with apahnitic texture. This series likely resulted from differentiation of liquids produced by low degrees of partial melting of primitive mantle. These rocks are float rocks or occurred as clast in conglomerate suggesting a provenance from Gale crater rim. NWA 7533 is the first Noachian breccia sampling the southern hemisphere Martian regolith. It is a polymict breccia with leucocratic clasts including zircon with 4.4 Ga ages Humayun et al., DOI :10.1038/nature). The alkali basaltic evolved clasts contain two feldspars (alkali and plagioclase) and modal recombination gives a basaltic trachy-andesite, gabbroic, trachy-andesite and mugearite clast (Agee et al. DOI: 10.1126/science. 1228858). Noritic clasts contain andesine, LCP, and Cr-magnetite. The monzonitic/mugearitic-evolved clasts are composed of alkali feldspar, plagioclase, augite, Ti-Magnetite, Cl-apatite and zircon. These clasts would represent products of Martian crust emplaced at 4.5 Ga and re-melted at 4.4 Ga (Humayun et al., DOI :10.1038/nature). The leucocratic clasts of the Noachian SNC breccia will be compared with evolved lithology encountered at Gale crater and products of Noachian magmatism will be discussed. JF - American Geophysical Union Fall Meeting AU - Sautter, V AU - Wiens, R C AU - Toplis, M J AU - Cousin, A AU - Forni, Olivier AU - Fabre, C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P54B EP - 07 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765878940?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Felsic+igneous+rocks+at+Gale+crater%3B+a+comparison+with+lithic+clasts+in+NWA+7533&rft.au=Sautter%2C+V%3BWiens%2C+R+C%3BToplis%2C+M+J%3BCousin%2C+A%3BForni%2C+Olivier%3BFabre%2C+C%3BAnonymous&rft.aulast=Sautter&rft.aufirst=V&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Akuna; an open source user environment for managing subsurface simulation workflows AN - 1765878266; 2016-011700 AB - The U.S. Department of Energy (DOE) is investing in development of a numerical modeling toolset called ASCEM (Advanced Simulation Capability for Environmental Management) to support modeling analyses at legacy waste sites. ASCEM is an open source and modular computing framework that incorporates new advances and tools for predicting contaminant fate and transport in natural and engineered systems. The ASCEM toolset includes both a Platform with Integrated Toolsets (called Akuna) and a High-Performance Computing multi-process simulator (called Amanzi). The focus of this presentation is on Akuna, an open-source user environment that manages subsurface simulation workflows and associated data and metadata. In this presentation, key elements of Akuna are demonstrated, which includes toolsets for model setup, database management, sensitivity analysis, parameter estimation, uncertainty quantification, and visualization of both model setup and simulation results. A key component of the workflow is in the automated job launching and monitoring capabilities, which allow a user to submit and monitor simulation runs on high-performance, parallel computers. Visualization of large outputs can also be performed without moving data back to local resources. These capabilities make high-performance computing accessible to the users who might not be familiar with batch queue systems and usage protocols on different supercomputers and clusters. JF - American Geophysical Union Fall Meeting AU - Freedman, Vicky L AU - Agarwal, D AU - Bensema, K AU - Finsterle, S AU - Gable, C W AU - Keating, E H AU - Krishnan, H AU - Lansing, Carina AU - Moeglein, William AU - Pau, G S H AU - Porter, Ellen AU - Scheibe, Tim D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H44D EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765878266?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Akuna%3B+an+open+source+user+environment+for+managing+subsurface+simulation+workflows&rft.au=Freedman%2C+Vicky+L%3BAgarwal%2C+D%3BBensema%2C+K%3BFinsterle%2C+S%3BGable%2C+C+W%3BKeating%2C+E+H%3BKrishnan%2C+H%3BLansing%2C+Carina%3BMoeglein%2C+William%3BPau%2C+G+S+H%3BPorter%2C+Ellen%3BScheibe%2C+Tim+D%3BAnonymous&rft.aulast=Freedman&rft.aufirst=Vicky&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Full-waveform validation of a 3D seismic model for western US AN - 1765877287; 2016-012248 AB - Since the initiation of tomographic studies in the 1970s, geoscientists have advanced the art of inferring 3D variations in the subsurface using collections of geophysical (primarily seismic) observables recorded at or near Earth's surface. Advances have come from improvement and enhancement of the available data and from research on theoretical and computational improvements to tomographic and generalized inverse methods. In the last decade, utilizing dense array datasets, these efforts have led to unprecedented 3D images of the subsurface. Understandably, less effort has been expended on model validation to provide an absolute assessment of model uncertainty. Generally models constructed with different data sets and independent computational codes are assessed with geological reasonability and compared other models to gain confidence. The question of "How good is a particular 3D geophysical model at representing the Earth's true nature?" remains largely unaddressed at a time when 3D Earth models are used for both societal and energy security. In the last few years, opportunities have arisen in earth-structure imaging, including the advent of new methods in computational seismology and statistical sciences. We use the unique and extensive High Performance Computing resources available at Los Alamos National Laboratory to explore approaches to realistic model validation. We present results from a study focused on validating a 3D model for the western United States generated using a joint inversion simultaneously fitting interpolated teleseismic P-wave receiver functions, Rayleigh-wave group-velocity estimates between 7 and 250 s period, and high-wavenumber filtered Bouguer gravity observations. Validation of the obtained model is performed through systematic comparison of observed and predicted seismograms generated using the Spectral Element Method, which is a direct numerical solution for full waveform modeling in 3D models, with accuracy of spectral methods. JF - American Geophysical Union Fall Meeting AU - Maceira, M AU - Larmat, Carene S AU - Ammon, Charles J AU - Chai, C AU - Herrmann, R B AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S33A EP - 4476 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765877287?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Full-waveform+validation+of+a+3D+seismic+model+for+western+US&rft.au=Maceira%2C+M%3BLarmat%2C+Carene+S%3BAmmon%2C+Charles+J%3BChai%2C+C%3BHerrmann%2C+R+B%3BAnonymous&rft.aulast=Maceira&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Temporal and spatial variations of earthquake source parameters within the 2012 nicoya, Costa Rica M (sub w) =7.6 earthquake rupture zone AN - 1765877229; 2016-012232 AB - Subduction zone megathrust faults produce the majority of seismic activity, as well as host a wide range of slip processes, including slow slip events and non-volcanic tremor. In a few regions, such as along the Middle America subduction zone where the Cocos Plate subducts beneath the Caribbean Plate, we are fortunate to have significant long-term seismic and geodetic networks situated above the seismogenic zone. This allows for areas of moment release and geodetic locking to be defined before, during, and after large magnitude earthquakes. These types of long-term observations allow us to explore possible spatial and temporal relationships between slip behavior and geodetic coupling. Here we use the local seismic network data to compute earthquake stress drops using S-wave coda recorded over a period of approximately 13 years, including for a large set of aftershocks of the 2012 Mw 7.6 earthquake along central Nicoya Peninsula. We use over 1000 earthquakes to test for possible changes in microearthquake behavior after the 2012 Nicoya earthquake, as well as spatial variations that might be linked to variations in mainshock slip and geodetic coupling. Preliminary results, focusing on underthrusting events, suggest spatial stress drop variations that correspond to areas that had significant slip during the mainshock. We also see differences of roughly a factor of 2 in stress drops for aftershocks within the high slip area relative to earthquakes that occurred in that same region within the previous 13 years, suggesting temporal variations as well. These observations have interesting implications for the nature of strong and weakly coupled fault zones, as well as how temporal changes in fault zones may manifest in earthquake behavior through the earthquake cycle. JF - American Geophysical Union Fall Meeting AU - Bilek, Susan L AU - Phillips, W S AU - Walter, Jake I AU - Schwartz, S Y AU - Peng, Z AU - Rotman, Holly M M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S32B EP - 02 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765877229?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Temporal+and+spatial+variations+of+earthquake+source+parameters+within+the+2012+nicoya%2C+Costa+Rica+M+%28sub+w%29+%3D7.6+earthquake+rupture+zone&rft.au=Bilek%2C+Susan+L%3BPhillips%2C+W+S%3BWalter%2C+Jake+I%3BSchwartz%2C+S+Y%3BPeng%2C+Z%3BRotman%2C+Holly+M+M%3BAnonymous&rft.aulast=Bilek&rft.aufirst=Susan&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Amanzi; an open-source multi-process simulator for environmental applications AN - 1765876891; 2016-011818 AB - The Advanced Simulation Capabililty for Environmental Management (ASCEM) program is developing an approach and open-source tool suite for standardized risk and performance assessments at legacy nuclear waste sites. These assessments begin with simplified models, and add geometric and geologic complexity as understanding is gained. The Platform toolsets (Akuna) generates these conceptual models and Amanzi provides the computational engine to perform the simulations, returning the results for analysis and visualization. In this presentation we highlight key elements of the design, algorithms and implementations used in Amanzi. In particular, the hierarchical and modular design is aligned with the coupled processes being simulated, and naturally supports a wide range of model complexity. This design leverages a dynamic data manager and the synergy of two graphs (one from the high-level perspective of the models the other from the dependencies of the variables in the model) to enable this flexible model configuration at run time. Moreover, to model sites with complex hydrostratigraphy, as well as engineered systems, we are developing a dual unstructured/structured capability. Recently, these capabilities have been collected in a framework named Arcos, and efforts have begun to improve interoperability between the unstructured and structured AMR approaches in Amanzi. To leverage a range of biogeochemistry capability from the community (e.g., CrunchFlow, PFLOTRAN, etc.), a biogeochemistry interface library was developed called Alquimia. To ensure that Amanzi is truly an open-source community code we require a completely open-source tool chain for our development. We will comment on elements of this tool chain, including the testing and documentation development tools such as docutils, and Sphinx. Finally, we will show simulation results from our phased demonstrations, including the geochemically complex Savannah River F-Area seepage basins. JF - American Geophysical Union Fall Meeting AU - Moulton, J D AU - Molins, S AU - Johnson, J N AU - Coon, E AU - Lipnikov, K AU - Day, M AU - Barker, Erin AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H51K EP - 0758 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765876891?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Amanzi%3B+an+open-source+multi-process+simulator+for+environmental+applications&rft.au=Moulton%2C+J+D%3BMolins%2C+S%3BJohnson%2C+J+N%3BCoon%2C+E%3BLipnikov%2C+K%3BDay%2C+M%3BBarker%2C+Erin%3BAnonymous&rft.aulast=Moulton&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Evolution of strain partitioning during creep of Carrara Marble AN - 1765873669; 2016-012026 AB - We measured the local strain and strain heterogeneity produced during creep deformation of split cylinders of Carrara marble under conventional triaxial loading to inelastic strains of 11% at a strain rate of 3X10 (super -5) s (super -1) , confining pressure of 300 MPa and 400 < T < 700 degrees C. A second suite of samples were deformed to strains of 11%, 22% and 36% at 600 degrees C and the same rate and confining pressure. Microscale strain mapping at a scale of 10 micrometers (MSSM) show that the partitioning of strain amongst twinning, dislocation slip, and grain boundary sliding mechanisms change with T. Preliminary results using a VPFFT model that gives more importance to dislocation slip predict strain heterogeneities with larger wavelength. Interestingly, at all T, although sliding occurred on some boundaries, on average, strain in regions near boundaries was less than that in grain interiors suggesting the formation of a core-mantle structure observed in naturally deformed rocks. The production of local crystallographic texture also depends on T (and presumably, partitioning amongst the mechanisms). In all the experiments, the texture index (TI) of local areas decreased after deformation, but the path of the evolution differed with changing T. Reductions in TI were greatest for samples deformed at 400 degrees C, where twin activity was greatest, and at 700 degrees C, where boundary sliding was more prevalent, and less for intermediate T. The wavelength and amplitude of the heterogeneity in local strain decreased with increasing strain at 600 degrees C, suggesting that the strain (and perhaps, structures) were being homogenized. From this data and previous observations, we conclude that the evolution of deformation structures in marble takes place over a substantial interval in strain; that the duration of this interval probably depends on strain rate, temperature, and pressure; and that extrapolation of mechanical behavior from lab to natural conditions will need to account for changes in strain partitioning. JF - American Geophysical Union Fall Meeting AU - Quintanilla Terminel, A AU - Evans, J B AU - Mainprice, David AU - Lebensohn, R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR42A EP - 05 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873669?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Evolution+of+strain+partitioning+during+creep+of+Carrara+Marble&rft.au=Quintanilla+Terminel%2C+A%3BEvans%2C+J+B%3BMainprice%2C+David%3BLebensohn%2C+R%3BAnonymous&rft.aulast=Quintanilla+Terminel&rft.aufirst=A&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Determining the location, number density and temporal evolution of streams of hazardous near-Earth objects using the magnetic signatures produced in destructive collisions AN - 1765873420; 2016-012108 AB - Near-Earth objects (NEOs) of tens of meters in diameter are difficult to detect by optical methods from the Earth but they result in the most damage per year. Many of these bodies are produced in non-destructive collisions with larger well-characterized NEOs. After generation, the debris spreads forward and backward in a cocoon around the orbit of the parent body. Thereafter, scattering will occur due to gravitational perturbations when the debris stream passes near a planet even when the parent body has no such close approaches. Therefore "safe" NEOs which have no close encounters to the Earth for thousands of years may be accompanied by potentially hazardous co-orbiting debris. We have developed a technique to identify co-orbiting debris by detecting the magnetic signature produced when some of the debris suffers destructive collisions with meteoroids, which are numerous and can be as small as tens of centimeters in diameter. Clouds of nanoscale dust/gas particles released in such collisions can interact coherently with the solar wind electromagnetically. The resultant magnetic perturbations are readily identified when they pass spacecraft equipped with magnetometers. We can use such observations to obtain the spatial and size distribution as well as temporal variation of the debris streams. A test of this technique has been performed and debris streams both leading and trailing asteroid 138175 have been identified. There is a finite spread across the original orbit and most of the co-orbitals were tens of meters in diameter before the disruptive collisions. We estimate that there were tens of thousands of such co-orbiting objects, comprising only 1% of the original mass of the parent asteroid but greatly increasing the impact hazard. A loss of the co-orbitals since 1970s has been inferred from observations with a decay time consistent with that calculated from the existing collisional model [Gruen et al., 1985]. Therefore disruptive collisions are the main loss mechanism of the co-orbiting debris associated with 138175. In summary, our technique helps us to identify which NEOs are accompanied by hazardous debris trails. Although our technique provides only the statistical properties, it indicates where high resolution optical surveys should be obtained in order to identify and track specific hazardous bodies. JF - American Geophysical Union Fall Meeting AU - Lai, H AU - Russell, C T AU - Wei, H AU - Delzanno, G L AU - Connors, M G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13D EP - 3848 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873420?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Determining+the+location%2C+number+density+and+temporal+evolution+of+streams+of+hazardous+near-Earth+objects+using+the+magnetic+signatures+produced+in+destructive+collisions&rft.au=Lai%2C+H%3BRussell%2C+C+T%3BWei%2C+H%3BDelzanno%2C+G+L%3BConnors%2C+M+G%3BAnonymous&rft.aulast=Lai&rft.aufirst=H&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Detection of repeating earthquakes along the Northern Mariana shallow thrust zone AN - 1765873378; 2016-012298 AB - The seismogenic character of the Northern Mariana Thrust Zone is unknown because of the absence of large historical megathrust earthquakes and the lack of appropriate geodetic data. Subduction seismicity in the Northern Mariana forearc shows clustering of events along strike and with depth. To further investigate the seismogenic characteristics of the region, we search for repeating earthquakes along the shallow thrust zone. Using the 2003-2004 Subduction Factory and 2012-2013 Mariana Trench Imaging Experiments, a cross correlation detection scanner is implemented to find repeating earthquakes. Template earthquakes are chosen from seismicity located within clusters along the shallow thrust zone and compared with continuous data from nearby ocean bottom seismometers using both conventional and subspace correlation detection methods. Preliminary results from scanning the 2003-2004 deployment have identified several families of repeating events. Many of these groups consist of repeating events that occur within a short time frame of the template event. In particular, several families have been detected in conjunction with the July 15, 2003 magnitude 5.1 earthquake, indicating detection of aftershock sequences. Repeating events that occur throughout the 2003-2004 yearlong deployment have also been detected, suggesting stable sliding of the plate with small asperities causing these repeating events. Further work may allow delineation of stable sliding regions as well as evaluation of the possible effects of several seamounts which are subducting within the study region. JF - American Geophysical Union Fall Meeting AU - Eimer, Melody O AU - Wiens, Douglas A AU - Rowe, Charlotte A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S33B EP - 4525 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873378?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Detection+of+repeating+earthquakes+along+the+Northern+Mariana+shallow+thrust+zone&rft.au=Eimer%2C+Melody+O%3BWiens%2C+Douglas+A%3BRowe%2C+Charlotte+A%3BAnonymous&rft.aulast=Eimer&rft.aufirst=Melody&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Corner frequency variation in the southeastern region of the 1992 Nicaragua tsunami earthquake AN - 1765871614; 2016-012290 AB - At the Nicaragua portion of the Middle America Trench, where the Cocos Plate is subducting at approximately 85 mm/yr, a tsunami earthquake (Mb 5.3, Ms 7.2, Mw 7.6) occurred at 15 km depth on 2 September 1992, causing a tsunami up to 8 m high and >116 deaths. A tsunami earthquake is characterized by deficiency in high frequency radiated energy and large tsunami for its Ms. Tsunami earthquakes are relatively rare, but their occurrence presents a significant hazard to coastal populations, so the potential to identify tsunami earthquake regions has wide-reaching hazard implications. Here we examine the notion that the cause of the dominantly low frequency energy in the 1992 tsunami earthquake may also manifest in small earthquakes in the same area. We examine 241 events within and south of the 1992 rupture limits with hypocenters 8-30 km depth and 1.7 10 (super 3) years) changes in hydrothermal activity induced by seismic events AN - 1756509969; 2016-006521 AB - The pollen (super 14) C age and oxygen isotopic composition of siliceous sinter deposits from the former Beowawe geyser field reveal evidence of two hydrothermal discharge events that followed relatively low-magnitude ( 10-11 m (super 2) ). Observed overturned temperature profiles in geothermal wells close (300m) to the Malpais fault suggest the onset of thermal convection occurred over shorter time scales (200-1000 years). We suggest that individual Malpais fault segments become clogged on shorter time scales and new routes to the surface are taken. JF - American Geophysical Union Fall Meeting AU - Person, M A AU - Howald, T AU - Campbell, A AU - Hofstra, A AU - Lueth, V AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H32F EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756509969?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Evidence+for+long-time+scale+%28%26gt%3B+10+%28super+3%29+years%29+changes+in+hydrothermal+activity+induced+by+seismic+events&rft.au=Person%2C+M+A%3BHowald%2C+T%3BCampbell%2C+A%3BHofstra%2C+A%3BLueth%2C+V%3BAnonymous&rft.aulast=Person&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-14 N1 - CODEN - #07548 ER - TY - JOUR T1 - Relating reactive transport to hierarchical sedimentary architecture; Part 2, Lagrangian-based transport models AN - 1756509208; 2016-006603 AB - We present new Lagrangian-based transport models for both the time-dependent effective retardation factor and the particle displacement variance of reactive solutes undergoing linear equilibrium sorption. The models represent the influence of hierarchical and multi-scale sedimentary architecture. The formulations are based on hierarchical expressions of the spatial covariance of log-permeability, Y=ln(k), log sorption distribution coefficient, Xi =ln(Kd), and their spatial cross-covariance. The spatial correlation structure in these covariance expressions is the probability of transitioning across strata types of different scales, and they are parameterized by independent and quantifiable physical attributes of hierarchical sedimentary architecture including univariate statistics for Y, Xi , and proportions and facies lengths. The models allow the study of the contribution of each scale of stratal architecture to the time-dependent effective retardation factor and the composite particle displacement variance, and thus the study of how hierarchical stratal architecture controls reactive plume spreading. The well-documented perchloroethene (PCE) tracer test at the Borden research site is used to illustrate the models. The models give a viable explanation for the observed PCE plume behavior. The results show that linear equilibrium sorption and heterogeneity in hydraulic and reactive attributes can explain both the PCE plume deceleration and the dispersion that was observed. The models give the contribution of each scale of stratal architecture to these processes. JF - American Geophysical Union Fall Meeting AU - Soltanian, M R AU - Ritzi, Robert W, Jr AU - Huang, Chaocheng AU - Dai, Z AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H33D EP - 0857 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756509208?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Relating+reactive+transport+to+hierarchical+sedimentary+architecture%3B+Part+2%2C+Lagrangian-based+transport+models&rft.au=Soltanian%2C+M+R%3BRitzi%2C+Robert+W%2C+Jr%3BHuang%2C+Chaocheng%3BDai%2C+Z%3BAnonymous&rft.aulast=Soltanian&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-14 N1 - CODEN - #07548 ER - TY - JOUR T1 - Numerical model of hydraulic fracturing fluid transport in the subsurface with pressure transient, density effects, and imbibition AN - 1752578651; 2016-001268 AB - Understanding the transport of hydraulic fracturing (HF) fluid that is injected into the deep subsurface for shale gas extraction is important to ensure that shallow drinking water aquifers are not contaminated from an environmental and public health perspective and to understand formation damage from an oil and gas production perspective. Upward pressure gradients, permeable pathways such as faults or improperly abandoned wellbores, and the density contrast of the HF fluid to the surrounding brine encourages upward HF fluid migration. In contrast, the very low shale permeability and the imbibition of water into partially-saturated shale may sequester much of the HF fluid. Using the Finite Element Heat and Mass Transfer Code (FEHM), single-phase flow and transport simulations are performed to quantify how much HF fluid is removed via the wellbore as flowback and produced water and how much reaches overlying aquifers; imbibition is calculated with a semi-analytical one-dimensional solution and treated as a sink term. The travel time for HF fluid to reach the shallow aquifers is highly dependent on the amount of water imbibed and the suction applied to the well. If imbibition rates and suction are small, the pressure transient due to injection and the density contrast allows rapid upward plume migration at early times. The density contrast diminishes considerably within tens to hundreds of years as mixing occurs. We present estimates of HF fluid migration to shallow aquifers during the first 1,000 years after hydraulic fracturing begins for ranges of subsurface properties. JF - American Geophysical Union Fall Meeting AU - Birdsell, Daniel AU - Rajaram, Hari AU - Dempsey, D AU - Viswanathan, H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H23C EP - 0887 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578651?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Numerical+model+of+hydraulic+fracturing+fluid+transport+in+the+subsurface+with+pressure+transient%2C+density+effects%2C+and+imbibition&rft.au=Birdsell%2C+Daniel%3BRajaram%2C+Hari%3BDempsey%2C+D%3BViswanathan%2C+H%3BAnonymous&rft.aulast=Birdsell&rft.aufirst=Daniel&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Experimental investigation of CO (sub 2) trapping and leakage mechanisms in deep geologic formations for model improvement AN - 1752578100; 2016-001371 AB - A fundamental and a comprehensive understanding of trapping and leakage processes will be of value to develop strategies for efficient and secure storage of CO2 in deep geologic formations and assess environmental and ecological risks associated with potential leakage. It is our contention that to make observations and collect data to obtain a fundamental understanding of how the natural formation heterogeneity manifested at all scales affects trapping is highly challenging or impossible to obtain in real field settings in deep geologic formations. A test scale intermediary between small laboratory columns and field scales that is referred to as "intermediate scale" provides an attractive alternative to investigate these processes under controlled conditions in the laboratory. Heterogeneities at all needed test scales can be designed using soils with known properties and experiments can be conducted under controlled conditions to obtain accurate data. Conducting intermediate scale laboratory experiments under ambient pressure and temperature conditions to understand the processes that occur in deep formations with very higher pressures and drastically different temperatures pose many challenges. This paper presents the approaches that were used to conduct multi-scale experiments from column to intermediate scale to understand the factors that contribute to capillary and dissolution trapping using surrogate fluids for supercritical CO2 and saline water combination. In addition, experiments were conducted in soil columns and two-dimensional tanks to study the effects of formation heterogeneity on CO2 gas evolution during leakage of water with dissolved CO2. The results from these experiments are presented to show how the new insights have helped to improve the conceptual understanding of effects of heterogeneity on CO2 trapping and leakage. This understanding has helped to improve numerical models that can be used to better engineer CO2 storage systems for permanence and evaluate possible failure risks. JF - American Geophysical Union Fall Meeting AU - Illangasekare, Tissa H AU - Trevisan, L AU - Agartan, E AU - Vargas-Johnson, Javier AU - Plampin, M R AU - Pini, R AU - Pawar, R AU - Cihan, A AU - Birkholzer, J T AU - Zhou, Q AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H24A EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578100?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Experimental+investigation+of+CO+%28sub+2%29+trapping+and+leakage+mechanisms+in+deep+geologic+formations+for+model+improvement&rft.au=Illangasekare%2C+Tissa+H%3BTrevisan%2C+L%3BAgartan%2C+E%3BVargas-Johnson%2C+Javier%3BPlampin%2C+M+R%3BPini%2C+R%3BPawar%2C+R%3BCihan%2C+A%3BBirkholzer%2C+J+T%3BZhou%2C+Q%3BAnonymous&rft.aulast=Illangasekare&rft.aufirst=Tissa&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Americium, cesium, and plutonium colloid-facilitated transport in a groundwater/bentonite/fracture fill material system; column experiments and model results AN - 1752578098; 2016-001383 AB - The objective of this study was to investigate and quantify the effects of desorption kinetics and colloid transport on radionuclides with different sorption affinities. We focused on quantifying transport mechanisms important for upscaling in time and distance. This will help determine the long-term fate and transport of radionuclides to aid in risk assessments. We selected a fractured/weathered granodiorite at the Grimsel Test Site (GTS) in Switzerland as a model crystalline rock repository system because the system has been thoroughly studied and field experiments involving radionuclides have already been conducted. Working on this system provides a unique opportunity to compare lab experiments with field-scale observations. Weathered fracture fill material (FFM) and bentonite used as backfill at the GTS were characterized (e.g., BET, SEM/EDS, QXRD), and batch and breakthrough column experiments were conducted. Solutions were prepared in synthetic groundwaters that matched the natural water chemistry. FFM samples were crushed, rinsed, sieved (150-355 mu m), and equilibrated with synthetic groundwater. Bentonite was crushed, sodium-saturated, equilibrated with synthetic groundwater, and settled to yield a stable suspension. Suspensions were equilibrated with Am, Cs, or Pu. All experiments were conducted with Teflon(Registered) materials to limit sorption to system components. After radionuclide/colloid injections reached stability, radionuclide-free solutions were injected to observe the desorption and release behavior. Aliquots of effluent were measured for pH, colloid concentration, and total and dissolved radionuclides. Unanalyzed effluent from the first column was then injected through a second column of fresh material. The process was repeated for a third column and the results of all three breakthrough curves were modeled with a multi-site/multi-rate MATLAB code to elucidate the sorption rate coefficients and binding site densities of the bentonite colloids and fracture fill material. Nearly 50% of the sorbed Am was exchanged from the colloids to the fracture filling material in each of the three columns; whereas, less Cs and Pu was desorbed with each pass through a new column. Using a two-site kinetic model allowed for interrogation of desorption rates and dominant transport parameters. JF - American Geophysical Union Fall Meeting AU - Dittrich, T M AU - Boukhalfa, H AU - Reimus, P W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H24E EP - 03 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578098?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Americium%2C+cesium%2C+and+plutonium+colloid-facilitated+transport+in+a+groundwater%2Fbentonite%2Ffracture+fill+material+system%3B+column+experiments+and+model+results&rft.au=Dittrich%2C+T+M%3BBoukhalfa%2C+H%3BReimus%2C+P+W%3BAnonymous&rft.aulast=Dittrich&rft.aufirst=T&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - On the performance of maximum-principle enforcing methods applied to large-scale subsurface problems AN - 1752575946; 2016-001443 AB - It is well known that numerical formulations (either finite element, finite volume or finite difference) do not meet maximum principles and the non-negative constraint for anisotropic diffusion equations. But these mathematical properties and physical constraints are important for predictive simulations in subsurface modeling. Recently, optimization-based methodologies have been proposed for diffusion-type equations that respect maximum principles and meet the non-negative constraint on general computational grids. Till date these methodologies have been tested only on small-scale academic problems with few thousands of degrees-of-freedom. But for practical problems in subsurface modeling, the degrees-of-freedom easily run into millions and sometimes into billions. The purpose of this research is to systematically study the performance of the non-negative methodologies for large-scale problems and in a parallel setting. We shall use PETSc for parallel environment, and TAO for parallel optimization solvers. Numerical simulations on real sites using our methodologies will be presented. JF - American Geophysical Union Fall Meeting AU - Karra, S AU - Chang, J AU - Nakshatrala, K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H41F EP - 0895 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752575946?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=On+the+performance+of+maximum-principle+enforcing+methods+applied+to+large-scale+subsurface+problems&rft.au=Karra%2C+S%3BChang%2C+J%3BNakshatrala%2C+K%3BAnonymous&rft.aulast=Karra&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Lessons Learned from 20 Years of production in the Barnett Shale AN - 1739086861; 2015-114295 AB - We analyze a 22 years of shale gas production, from more than 18,000 wells, in the Barnett formation to better characterize and understand shale gas production. The Barnett Shale formation has a relatively long history of exploration and shale gas production using both hydraulic fracturing and horizontal wells. The original Barnett well, a vertical well that used a nitrogen foam working fluid, dates back to 1981, and the first horizontal wells were drilled in 1991. However, the first "successful" production wells were not drilled until around 1997-1998. Gas production data for the Barnett is publicly available dating back to 1993. Here, we analyze gas production from approximately 18,000 individual wells (data collected in July 2014) in order to understand and quantify how shale gas has been produced in the Barnett. This includes understanding how and when shale gas production techniques have improved resulting in enhanced gas production. Several key trends and hypotheses emerge from this analysis. For example, the data shows a distinct and strong pattern of "learning by doing", whereby per-well gas production rates have notably increased over time. For example, a typical well drilled in 2011 takes three years to produce 1,000 MMcf, whereas a typical 2007 well takes seven years to produce the same quantity. The data can also be differentiated by parameters such as depth and well type (principally vertical vs. horizontal); we show a clear link between drilling techniques and production. The analysis also reveals unexpected outcomes. For instance, wells drilled in the period 1994-1999 have greater cumulative production than wells drilled in the period 2000-2006. We hypothesize that the older wells often performed poorly when first drilled and were thus subsequently re-fractured one or more times, whereas the later wells were re-fractured much less frequently. Finally, we compare shale gas production from the Barnett formation with more recent production from the Hayneville-Bossier and Eagle Ford formations. We believe that lessons learned from historic shale gas production can help us better understand shale production, including quantifying "rates of learning", as well as providing the foundation of understanding the benefits and challenges of alternative working fluids such as CO2. JF - American Geophysical Union Fall Meeting AU - Gupta, R AU - Middleton, R S AU - Carey, J W AU - Currier, R AU - Karra, S AU - Viswanathan, H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11H EP - 0987 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739086861?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Lessons+Learned+from+20+Years+of+production+in+the+Barnett+Shale&rft.au=Gupta%2C+R%3BMiddleton%2C+R+S%3BCarey%2C+J+W%3BCurrier%2C+R%3BKarra%2C+S%3BViswanathan%2C+H%3BAnonymous&rft.aulast=Gupta&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Oedometric small angle neutron scattering; in-situ observation of deformation partitioning in clay-rich samples AN - 1739086798; 2015-114321 AB - We present novel oedometric small angle neutron scattering (SANS) on deforming clay-rich materials. Oedometric SANS involves a non-hydrostatic pressure vessel (i.e., the oedometer) that places a porous sample under uniaxial strain with control of applied pore pressure. The oedometer is optimized for neutron optics of SANS on the Low-Q Diffractometer of the Los Alamos Neutron Science Center. The device enables normal oedometric measurements of time-dependent compaction, but with SANS for in situ observation of pore structure evolution under uniaxial strain as a function of effective stress and pore fluid compositions. We present preliminary examination of clay compaction and testing of the device. Funding from the DOE Basic Energy Sciences Geosciences Program is gratefully acknowledged. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Bryan, C R AU - Heath, J E AU - Hjelm, R AU - Taylor, Mark AU - Olds, D AU - Dewers, T A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11H EP - 1013 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739086798?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Oedometric+small+angle+neutron+scattering%3B+in-situ+observation+of+deformation+partitioning+in+clay-rich+samples&rft.au=Bryan%2C+C+R%3BHeath%2C+J+E%3BHjelm%2C+R%3BTaylor%2C+Mark%3BOlds%2C+D%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Bryan&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Coupled fracture and flow in shale in hydraulic fracturing AN - 1739086711; 2015-114308 AB - Production of hydrocarbon from shale requires creation and maintenance of fracture permeability in an otherwise impermeable shale matrix. In this study, we use a combination of triaxial coreflood experiments and x-ray tomography characterization to investigate the fracture-permeability behavior of Utica shale at in situ reservoir conditions (25-50 degrees C and 35-120 bars). Initially impermeable shale core was placed between flat anvils (compression) or between split anvils (pure shear) and loaded until failure in the triaxial device. Permeability was monitored continuously during this process. Significant deformation (>1%) was required to generate a transmissive fracture system. Permeability generally peaked at the point of a distinct failure event and then dropped by a factor of 2-6 when the system returned to hydrostatic failure. Permeability was very small in compression experiments (<1 mD), possibly because of limited fracture connectivity through the anvils. In pure share experiments, shale with bedding planes perpendicular to shear loading developed complex fracture networks with narrow apertures and peak permeability of 30 mD. Shale with bedding planes parallel to shear loading developed simple fractures with large apertures and a peak permeability as high as 1 D. Fracture systems held at static conditions for periods of several hours showed little change in effective permeability at hydrostatic conditions as high as 140 bars. However, permeability of fractured systems was a function of hydrostatic pressure, declining in a pseudo-linear, exponential fashion as pressure increased. We also observed that permeability decreased with increasing fluid flow rate indicating that flow did not follow Darcy's Law, possibly due to non-laminar flow conditions, and conformed to Forscheimer's law. The coupled deformation and flow behavior of Utica shale, particularly the large deformation required to initiate flow, indicates the probable importance of activation of existing fractures in hydraulic fracturing and that these fractures can have adequate permeability for the production of hydrocarbon. JF - American Geophysical Union Fall Meeting AU - Carey, J W AU - Mori, H AU - Viswanathan, H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11H EP - 1000 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739086711?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Coupled+fracture+and+flow+in+shale+in+hydraulic+fracturing&rft.au=Carey%2C+J+W%3BMori%2C+H%3BViswanathan%2C+H%3BAnonymous&rft.aulast=Carey&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Investigations in reducing the computational expense of transient 3D multi-phase CO (sub 2) wellbore leakage simulations; time-series matching versus multivariate adaptive regression splines AN - 1739085661; 2015-114336 AB - Depleted oil and gas reserves have abandoned wellbore densities up to 10 per square kilometer (Crow, 2010). These locations are considered to have favorable geological structure and properties for CO (sub 2) sequestration. To understand the risk of CO (sub 2) leakage along these abandoned wellbores requires the simulation of a comprehensive set of realizations encompassing the potential scenarios. The simulations must capture transient, 3D, multi-phase effects (i.e. supercritical, liquid, and gas CO (sub 2) phases along with liquid reservoir and aquifer fluids), and include capillary and buoyant flow. Performing a large number of these simulations becomes computationally burdensome. In order to reduce this computational burden, regression approaches have been used to develop computationally efficient reduced order models to try to capture the general trends of the simulations. In these approaches, model inputs and outputs are collected from the transient simulations at each time step. Recognizing that many of the inputs to the regression approach come from time series (i.e. pressures and CO (sub 2) saturations) and that all of the outputs are time series (i.e. CO (sub 2) and brine flow rates), we develop a time-series matching approach. In this approach, CO (sub 2) and brine flow rate time series are estimated given input time series and parameters by averaging the flow rates of the collected simulations weighted by the similarity of their input time series and parameter. Similarity of both time series and parameters is calculated by the Euclidean distance. Euclidean distances are converted to a generalized likelihood metric, and used to weight the flow-rate time-series averages. We present a comparison of this time series matching approach to the MARS algorithm. JF - American Geophysical Union Fall Meeting AU - Harp, D R AU - Pawar, Rajesh AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11K EP - 07 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085661?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Investigations+in+reducing+the+computational+expense+of+transient+3D+multi-phase+CO+%28sub+2%29+wellbore+leakage+simulations%3B+time-series+matching+versus+multivariate+adaptive+regression+splines&rft.au=Harp%2C+D+R%3BPawar%2C+Rajesh%3BAnonymous&rft.aulast=Harp&rft.aufirst=D&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integrated experimental and computational study of hydraulic fracturing and the use of alternative fracking fluids AN - 1739085621; 2015-114313 AB - Shale gas is an unconventional fossil energy resource that is already having a profound impact on US energy independence and is projected to last for at least 100 years. Production of methane and other hydrocarbons from low permeability shale involves hydrofracturing of rock, establishing fracture connectivity, and multiphase fluid-flow and reaction processes all of which are poorly understood. The result is inefficient extraction with many environmental concerns. A science-based capability is required to quantify the governing mesoscale fluid-solid interactions, including microstructural control of fracture patterns and the interaction of engineered fluids with hydrocarbon flow. These interactions depend on coupled thermo-hydro-mechanical-chemical (THMC) processes over scales from microns to tens of meters. Determining the key mechanisms in subsurface THMC systems has been impeded due to the lack of sophisticated experimental methods to measure fracture aperture and connectivity, multiphase permeability, and chemical exchange capacities at the high temperature, pressure, and stresses present in the subsurface. This project uses innovative high-pressure microfluidic and triaxial core flood experiments on shale to explore fracture-permeability relations and the extraction of hydrocarbon. These data are integrated with simulations including lattice Boltzmann modeling of pore-scale processes, finite-element/discrete element models of fracture development in the near-well environment, discrete-fracture modeling of the reservoir, and system-scale models to assess the economics of alternative fracturing fluids. The ultimate goal is to make the necessary measurements to develop models that can be used to determine the reservoir operating conditions necessary to gain a degree of control over fracture generation, fluid flow, and interfacial processes over a range of subsurface conditions. JF - American Geophysical Union Fall Meeting AU - Viswanathan, H AU - Carey, J W AU - Karra, S AU - Porter, M L AU - Rougier, E AU - Zhang, D AU - Makedonska, Natalia AU - Middleton, R S AU - Currier, R AU - Gupta, R AU - Lei, Z AU - Kang, Q AU - O'Malley, D AU - Hyman, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11H EP - 1005 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085621?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Integrated+experimental+and+computational+study+of+hydraulic+fracturing+and+the+use+of+alternative+fracking+fluids&rft.au=Viswanathan%2C+H%3BCarey%2C+J+W%3BKarra%2C+S%3BPorter%2C+M+L%3BRougier%2C+E%3BZhang%2C+D%3BMakedonska%2C+Natalia%3BMiddleton%2C+R+S%3BCurrier%2C+R%3BGupta%2C+R%3BLei%2C+Z%3BKang%2C+Q%3BO%27Malley%2C+D%3BHyman%2C+J%3BAnonymous&rft.aulast=Viswanathan&rft.aufirst=H&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Model-free data analysis for source separation based on non-negative matrix factorization and k-means clustering (NMFk) AN - 1739085609; 2015-114341 AB - The identification of the physical sources causing spatial and temporal fluctuations of state variables such as river stage levels and aquifer hydraulic heads is challenging. The fluctuations can be caused by variations in natural and anthropogenic sources such as precipitation events, infiltration, groundwater pumping, barometric pressures, etc. The source identification and separation can be crucial for conceptualization of the hydrological conditions and characterization of system properties. If the original signals that cause the observed state-variable transients can be successfully "unmixed", decoupled physics models may then be applied to analyze the propagation of each signal independently. We propose a new model-free inverse analysis of transient data based on Non-negative Matrix Factorization (NMF) method for Blind Source Separation (BSS) coupled with k-means clustering algorithm, which we call NMFk. NMFk is capable of identifying a set of unique sources from a set of experimentally measured mixed signals, without any information about the sources, their transients, and the physical mechanisms and properties controlling the signal propagation through the system. A classical BSS conundrum is the so-called "cocktail-party" problem where several microphones are recording the sounds in a ballroom (music, conversations, noise, etc.). Each of the microphones is recording a mixture of the sounds. The goal of BSS is to "unmix'" and reconstruct the original sounds from the microphone records. Similarly to the "cocktail-party" problem, our model-free analysis only requires information about state-variable transients at a number of observation points, m, where m>r, and r is the number of unknown unique sources causing the observed fluctuations. We apply the analysis on a dataset from the Los Alamos National Laboratory (LANL) site. We identify and estimate the impact and sources are barometric pressure and water-supply pumping effects. We also estimate the location of the water-supply pumping wells based on the available data. The possible applications of the NMFk algorithm are not limited to hydrology problems; NMFk can be applied to any problem where temporal system behavior is observed at multiple locations and an unknown number of physical sources are causing these fluctuations. JF - American Geophysical Union Fall Meeting AU - Vesselinov, V V AU - Alexandrov, Boian AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11N EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085609?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Model-free+data+analysis+for+source+separation+based+on+non-negative+matrix+factorization+and+k-means+clustering+%28NMFk%29&rft.au=Vesselinov%2C+V+V%3BAlexandrov%2C+Boian%3BAnonymous&rft.aulast=Vesselinov&rft.aufirst=V&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Shale fracture analysis using the combined finite-discrete element method AN - 1739085468; 2015-114304 AB - Hydraulic fracturing (hydrofrac) is a successful method used to extract oil and gas from highly carbonate rocks like shale. However, challenges exist for industry experts estimate that for a single $10 million dollar lateral wellbore fracking operation, only 10% of the hydrocarbons contained in the rock are extracted. To better understand how to improve hydrofrac recovery efficiencies and to lower its costs, LANL recently funded the Laboratory Directed Research and Development (LDRD) project: "Discovery Science of Hydraulic Fracturing: Innovative Working Fluids and Their Interactions with Rocks, Fractures, and Hydrocarbons". Under the support of this project, the LDRD modeling team is working with the experimental team to understand fracture initiation and propagation in shale rocks. LANL's hybrid hydro-mechanical (HM) tool, the Hybrid Optimization Software Suite (HOSS), is being used to simulate the complex fracture and fragment processes under a variety of different boundary conditions. HOSS is based on the combined finite-discrete element method (FDEM) and has been proven to be a superior computational tool for multi-fracturing problems. In this work, the comparison of HOSS simulation results to triaxial core flooding experiments will be presented. JF - American Geophysical Union Fall Meeting AU - Carey, J W AU - Lei, Z AU - Rougier, E AU - Knight, E E AU - Viswanathan, H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11H EP - 0996 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085468?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Shale+fracture+analysis+using+the+combined+finite-discrete+element+method&rft.au=Carey%2C+J+W%3BLei%2C+Z%3BRougier%2C+E%3BKnight%2C+E+E%3BViswanathan%2C+H%3BAnonymous&rft.aulast=Carey&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Use of groundwater tracers to assess climate change in north-central New Mexico during the Holocene epoch AN - 1739085397; 2015-114702 AB - The groundwater system at Los Alamos, New Mexico encompasses a complex shallow mountain-block and mountain-front zone; intermediate-depth perched zones located east of the mountain front; and an extensive regional aquifer occupying the Rio Grande rift. In the study area, groundwater-flow paths in the regional aquifer are generally from the northwest to southeast that laterally extend 17 km before discharging to the Rio Grande. This system is unconfined and variable mixing occurs at greater distances east of the primary recharge zones. Since 1943, the regional aquifer has been mined for industrial processes and residential use and consumption at Los Alamos. A large data set for groundwater-age and inorganic solutes has been assembled for the intermediate-depth perched zones and regional aquifer, which provides a potential archive record of paleoclimate-change occurring during the past 10,000 years. Groundwater ages range from modern groundwater to approximately 9,700 years before present. Unadjusted radiocarbon-age results for groundwater samples collected from 58 background-monitoring wells and 10 springs correlate well with natural chloride and perchlorate concentrations and delta 18O values. Background concentrations of dissolved perchlorate and chloride increase with increasing groundwater age and residence time. Values of delta 18O are slightly heavier in groundwater samples having increasing age, suggesting that warmer climatic conditions occurred 10,000 years before present. Perchlorate and delta 18O datasets correlate the strongest with average groundwater age, showing Pearson correlations of 0.81 and 0.71, respectively. The Pearson correlations for chloride to age and perchlorate to chloride are 0.62 and 0.81, respectively. Overall, this dataset suggests that climatic cooling has gradually occurred in north-central New Mexico during the Holocene, and does corroborate previous Holocene climate-change studies conducted in the southwestern United States. JF - American Geophysical Union Fall Meeting AU - Yanicak, S M AU - Dale, M AU - Granzow, K AU - Longmire, P AU - Perkins, G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP43B EP - 1484 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085397?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Use+of+groundwater+tracers+to+assess+climate+change+in+north-central+New+Mexico+during+the+Holocene+epoch&rft.au=Yanicak%2C+S+M%3BDale%2C+M%3BGranzow%2C+K%3BLongmire%2C+P%3BPerkins%2C+G%3BAnonymous&rft.aulast=Yanicak&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - A study on the effect of fracture aperture variability on advective transport in a fractured shale using discrete fracture network modeling AN - 1739082493; 2015-116998 AB - Natural gas from unconventional fossil energy sources such as shale and tight gasformations has a profound impact on US energy independence. The current state ofproduction of methane and other hydrocarbons from low permeability shale involvesprocesses such as hydraulic fracturing of rock, multiphase flow, and recovery of the gasvia these fractures. Although hydraulic fracturing has been used for the past couple ofdecades, little is known about the underlying mechanisms behind the production curves that are seen in the field, such as, reasons for 50-60% decline after the first year in typical production curves. Numerical experiments on a realistic fractured shale system are presented toidentify the effect of complex flow of gas in fractures and matrix diffusion on the production curve. For characterizing flow, including the characteristics and geometries for the fracture networks, we use a methodology that incorporates a recently developed discrete fracture network meshing approach, which is combined with the highly parallel PFLOTRAN subsurface flow and reactive transport code and a new particle tracking capability. The results of this reservoir-scale methodology for analyzing the decline in gas production rates indicate dominant flow in fractures in the initial high production rate. Increase in matrix diffusivity improves production recovery after the initial production of gas from fractures. Moreover, it is observed that increasing aperture variability within a single fracture has little effect on the production compared to variations of the mean fracture aperture from fracture to fracture in a fracture network. JF - American Geophysical Union Fall Meeting AU - Makedonska, N AU - Karra, S AU - Painter, S L AU - Viswanathan, H AU - Gable, C W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H13Q EP - 05 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739082493?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+study+on+the+effect+of+fracture+aperture+variability+on+advective+transport+in+a+fractured+shale+using+discrete+fracture+network+modeling&rft.au=Makedonska%2C+N%3BKarra%2C+S%3BPainter%2C+S+L%3BViswanathan%2C+H%3BGable%2C+C+W%3BAnonymous&rft.aulast=Makedonska&rft.aufirst=N&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Asteroid defence; radiation deposition profiles for angle and depth AN - 1739082419; 2015-117148 AB - In this work we study the energy and momentum deposited to a hazardous near-earth object due to the radiation (photons) from a nuclear stand-offburst. We use an adaptive-mesh hydrocode, which models the radiation via nonequilibrium diffusion, to investigate the deposition profiles at varying depths and angles, and we compare these results to the analytic work by Ahrens and Harris. For the problem of interest, the radiation mean-free-path is exceedingly small (O(1 mm)) compared to the size of the asteroid (O(100 m)), and the radiation is dominantly absorbed by those parts of the asteroid that are closest to the nuclear source. We present a time-dependent analysis of the radiation-energy and radiation-momentum deposition, as well as the resolution of the mesh, and a demonstration of the convergence of our results. JF - American Geophysical Union Fall Meeting AU - Ferguson, J AU - Gisler, G R AU - Plesko, C S AU - Weaver, R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH23A EP - 3866 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739082419?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Asteroid+defence%3B+radiation+deposition+profiles+for+angle+and+depth&rft.au=Ferguson%2C+J%3BGisler%2C+G+R%3BPlesko%2C+C+S%3BWeaver%2C+R%3BAnonymous&rft.aulast=Ferguson&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - An overview of the Los Alamos program on asteroid mitigation by a nuclear explosion AN - 1739082086; 2015-117143 AB - Los Alamos National Laboratory is standing up a new program to address the mitigation of a potentially hazardous objects (PHO) by using nuclear explosives. A series of efforts at Los Alamos have been working this problem for the last few years in an informal fashion. We now have a funded program to dedicate time to this important mission. The goal of our project is to study the effectiveness of using a nuclear explosive to mitigate (alter orbit or destroy) a PHO on an Earth crossing path. We are also pursuing studies of impact hazards should the international leadership decide not to organize a mission for active mitigation of a PHO. Such impact hazards are characterized as local, regional or global. Impact hazards include: a direct hit in an urban area (potentially catastrophic but highly unlikely); the generation a significant tsunami from an ocean impact close to a coastline and regional and global effects from medium to large impactors. Previous studies at Los Alamos have looked at 2D and 3D simulations in the deep ocean from large bolides, as well as impacts that have global consequences. More recent work has included radiation-hydrodynamic simulations of momentum transfer (and enhancement) from a low energy (10 kt) stand-off source, as well as surface and subsurface high energy explosions (100 kt - 10 Mt) for example PHOs. The current program will carefully look at two main aspects of using a standoff nuclear source: 1) a computational study for the optimum height-of-burst (HOB) of a stand-off burst using our best energy coupling techniques for both neutrons and x-rays; and 2) as a function of the nuclear energy produced and the HOB what is the optimum energy field: neutrons or x-rays. This team is also working with NNSA and NASA Goddard to compare numerical results for these complicated simulations on a well defined series of test problems involving both kinetic impactors and stand-off nuclear energy sources. Results will be shown by the co-authors on individual aspects of these simulations. JF - American Geophysical Union Fall Meeting AU - Weaver, R AU - Gisler, G R AU - Plesko, C S AU - Ferguson, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH23A EP - 3853 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739082086?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=An+overview+of+the+Los+Alamos+program+on+asteroid+mitigation+by+a+nuclear+explosion&rft.au=Weaver%2C+R%3BGisler%2C+G+R%3BPlesko%2C+C+S%3BFerguson%2C+J%3BAnonymous&rft.aulast=Weaver&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Adventures in STEM; lessons in water chemistry from elementary school to graduate school AN - 1734270244; 2015-108627 AB - I will present the accumulation of over 10 years of experience teaching STEM subjects to students ranging from 1st grade to graduate school. I was fortunate to gain a lot of valuable teaching experience while in graduate school in Boulder, CO and so many of my experiences center on opportunities for connecting with students in the field in CO. 3rd-5th grade field hikes. While helping at Jamestown Elementary School, I led hikes with a 3-5th grade class to an abandoned fluorospar mine where the students were able to pick up beautiful purple fluorite crystals from the ground while discussing how mining works. During the hike back, we used field meters to measure the pH and conductivity of the stream and discussed the need to balance society's need for metals with the harmful effects of acid mine drainage. 9th, 10th grade STEM Academy at Skyline High School. During an NSF-sponsored fellowship, I had the opportunity to teach a STEM class to 9th and 10th graders where we used the engineering design process to a) design a tool to help a handicapped 3rd grader use the drinking fountain by herself and b) design a treatment system for cleaning up acid mine drainage. Undergraduate and Graduate Environmental Water Chemistry Field Trip. Students had the opportunity to tour two local mine sites to collect contaminated water that would be used in class for alkalinity titrations and pH, sulfate, and hardness measurements. They also collected water samples upstream and at multiple points downstream of a wastewater treatment plan and measured and graphed the dissolved oxygen "sag" in the river. My main teaching philosophy has two parts: 1) assume the students know nothing and 2) assume the students are even smarter than you think you are. This informs my approach to field trips by always starting from the beginning, but also not oversimplifying the topic. First graders on their best day can be very similar to graduate students on their worst. JF - American Geophysical Union Fall Meeting AU - Dittrich, T M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract ED13E EP - 07 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734270244?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Adventures+in+STEM%3B+lessons+in+water+chemistry+from+elementary+school+to+graduate+school&rft.au=Dittrich%2C+T+M%3BAnonymous&rft.aulast=Dittrich&rft.aufirst=T&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Linking inundation patterns and dynamics in a permafrost landscape to hydrologic, thermal, biogeochemical and ecosystem processes AN - 1734269209; 2015-111986 AB - The Arctic coastal plain is characterized by multi-scale geomorphic features including thaw lakes, drained thaw lake basins, and clusters of ice wedge polygons composed of troughs, centers, and rims. The topographic and subsurface properties of these features control the lateral and vertical drainage pathways of snow melt and precipitation as well as the spatial and temporal dynamics of standing water in the landscape. The Next Generation Ecosystem Experiment, NGEE-Arctic, project combines multi-scale in-situ and remote surface and subsurface observations that quantify the interactions between landscape structure, hydrology, the carbon cycle and energy balance of Arctic permafrost environments, with the aim of improving representation of Arctic ecosystem processes in global climate models. Data and models from the project show distinct relationships exist between the hydro-geomorphic features mapped on the ground and observed in remote sensing imagery, and the measured in-situ thermal, biogeochemical and ecosystem responses coincident with those features. The relationships between micro-topographic setting, snow distribution, inundation, subsurface temperature and thaw depth observed at the NGEE Barrow field sites are now well reproduced in process resolving models such as Pflotran and the Arctic Terrestrial Simulator. Current modeling efforts are investigating how topographically controlled thermal-hydrologic dynamics impact the carbon cycle. The next challenge is to scale these relationships for application in a global climate model grid cell to enable pan-Arctic predictions of future change, including the change in topography and inundation resulting from thawing permafrost and melting ground ice. NGEE-Arctic is funded by the DOE Office of Science, Biological and Environmental Research program. JF - American Geophysical Union Fall Meeting AU - Wilson, C J AU - Hinzman, L D AU - Iwahana, G AU - Lara, M J AU - Liljedahl, A AU - Painter, S L AU - Romanovsky, V E AU - Wullschleger, S D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GC23G EP - 08 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734269209?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Linking+inundation+patterns+and+dynamics+in+a+permafrost+landscape+to+hydrologic%2C+thermal%2C+biogeochemical+and+ecosystem+processes&rft.au=Wilson%2C+C+J%3BHinzman%2C+L+D%3BIwahana%2C+G%3BLara%2C+M+J%3BLiljedahl%2C+A%3BPainter%2C+S+L%3BRomanovsky%2C+V+E%3BWullschleger%2C+S+D%3BAnonymous&rft.aulast=Wilson&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Investigation of tsunami-ionospheric coupling efficiency AN - 1734267476; 2015-108939 AB - Recent studies have shown that coupling exists between ocean tsunamis and the upper atmosphere, opening up the possibility of tsunami monitoring through observing the ionosphere. Several measurement techniques have demonstrated the effects of this coupling in the ionosphere. Here, we present data from two techniques that allow for deducing properties of a tsunami from the ionosphere (e.g., wavelength, orientation, and velocity), namely total electron content (TEC) measurements from dual-frequency GPS receivers and ionospheric imaging through monitoring the airglow layers surrounding the earth. However, a quantitative relationship between the wave amplitudes observed in the ionosphere and the height of the tsunami remains elusive. Ionospheric signatures from two tsunamis in the Pacific Ocean, caused by the 2011 Tohoku and 2012 Haida Gwaii earthquakes, have been observed in airglow imaging systems and a network of dual-frequency GPS receivers located in Hawaii. These two events provide excellent test cases for the study of tsunami-ionospheric coupling efficiency, most notably the effects of the relative orientation between the tsunami-induced gravity waves and the Earth's magnetic field. We present a quantitative comparison of the TEC and airglow intensity variation from these events, including results from tsunami normal mode summation modeling. JF - American Geophysical Union Fall Meeting AU - Fisher, D J AU - Grawe, M AU - Makela, J J AU - Coisson, P AU - Rolland, Lucie AU - Rakoto, V AU - Lognonne, P H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH31C EP - 3875 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734267476?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Investigation+of+tsunami-ionospheric+coupling+efficiency&rft.au=Fisher%2C+D+J%3BGrawe%2C+M%3BMakela%2C+J+J%3BCoisson%2C+P%3BRolland%2C+Lucie%3BRakoto%2C+V%3BLognonne%2C+P+H%3BAnonymous&rft.aulast=Fisher&rft.aufirst=D&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Toward seismic source imaging using seismo-ionospheric data AN - 1734266847; 2015-108937 AB - The worldwide coverage offered by global navigation space systems (GNSS) such as GPS, GLONASS or Galileo allows seismological measurements of a new kind. GNSS-derived total electron content (TEC) measurements can be especially useful to image seismically active zones that are not covered by conventional instruments. For instance, it has been shown that the Japanese dense GPS network GEONET was able to record images of the ionosphere response to the initial coseismic sea-surface motion induced by the great Mw 9.0 2011 Tohoku-Oki earthquake less than 10 minutes after the rupture initiation (Astafyeva et al., 2013). But earthquakes of lower magnitude, down to about 6.5 would also induce measurable ionospheric perturbations, when GNSS stations are located less than 250 km away from the epicenter. In order to make use of these new data, ionospheric seismology needs to develop accurate forward models so that we can invert for quantitative seismic sources parameters. We will present our current understanding of the coupling mechanisms between the solid Earth, the ocean, the atmosphere and the ionosphere. We will also present the state-of-the-art in the modeling of coseismic ionospheric disturbances using acoustic ray theory and a new 3D modeling method based on the Spectral Element Method (SEM). This latter numerical tool will allow us to incorporate lateral variations in the solid Earth properties, the bathymetry and the atmosphere as well as realistic seismic source parameters. Furthermore, seismo-acoustic waves propagate in the atmosphere at a much slower speed (from 0.3 to approximately 1 km/s) than seismic waves propagate in the solid Earth. We are exploring the application of back-projection and time-reversal methods to TEC observations in order to retrieve the time and space characteristics of the acoustic emission in the seismic source area. We will first show modeling and inversion results with synthetic data. Finally, we will illustrate the imaging capability of our approach with, among other possible examples, the 2011 Mw 9.0 Tohoku-Oki earthquake, Japan, the 2012 Mw 7.8 Haida Gwaii earthquake, Canada and the 2011 Mw 7.1 Van earthquake, Eastern Turkey. JF - American Geophysical Union Fall Meeting AU - Rolland, Lucie AU - Larmat, Carene S AU - Mikesell, D AU - Sladen, A AU - Khelfi, K AU - Astafyeva, E AU - Lognonne, P H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH31C EP - 3873 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734266847?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Toward+seismic+source+imaging+using+seismo-ionospheric+data&rft.au=Rolland%2C+Lucie%3BLarmat%2C+Carene+S%3BMikesell%2C+D%3BSladen%2C+A%3BKhelfi%2C+K%3BAstafyeva%2C+E%3BLognonne%2C+P+H%3BAnonymous&rft.aulast=Rolland&rft.aufirst=Lucie&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Testing a community water supply well located near a stream for susceptibility to stream contamination and low-flows AN - 1734266720; 2015-108683 AB - A community well is the primary water supply to the town of El Rito. This small rural town in is located in a semi-arid, mountainous portion of northern New Mexico where water is scarce. The well is 72 meters from a nearby intermittent stream. Initial tritium sampling suggests a groundwater connection between the stream and well. The community is concerned with the sustainability and future quality of the well water. If this well is as tightly connected to the stream as the tritium data suggests, then the well is potentially at risk due to upstream contamination and the impacts of extended drought. To examine this, we observed the well over a two-week period performing pump and recovery tests, electrical resistivity surveys, and physical observations of the nearby stream. We also collected general chemistry, stable isotope and radon samples from the well and stream. Despite the large well diameter, our pump test data exhibited behavior similar to a Theis curve, but the rate of drawdown decreased below the Theis curve late in the test. This decrease suggests that the aquifer is being recharged, possibly through delayed yield, upwelling of groundwater, or from the stream. The delayed yield hypothesis is supported by our electrical resistivity surveys, which shows very little change in the saturated zone over the course of the pump test, and by low values of pump-test estimated aquifer storativity. Observations of the nearby stream showed no change in stream-water level throughout the pump test. Together this data suggests that the interaction between the stream and the well is low, but recharge could be occurring through other mechanisms such as delayed yield. Additional pump tests of longer duration are required to determine the exact nature of the aquifer and its communication with the well. JF - American Geophysical Union Fall Meeting AU - Stewart-Maddox, N S AU - Tysor, E H AU - Swanson, J AU - Degon, A AU - Howard, J AU - Tsinnajinnie, L AU - Frisbee, M D AU - Wilson, J L AU - Newman, B D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract ED31F EP - 3483 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734266720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Testing+a+community+water+supply+well+located+near+a+stream+for+susceptibility+to+stream+contamination+and+low-flows&rft.au=Stewart-Maddox%2C+N+S%3BTysor%2C+E+H%3BSwanson%2C+J%3BDegon%2C+A%3BHoward%2C+J%3BTsinnajinnie%2C+L%3BFrisbee%2C+M+D%3BWilson%2C+J+L%3BNewman%2C+B+D%3BAnonymous&rft.aulast=Stewart-Maddox&rft.aufirst=N&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Successes and challenges in the SAGE (Summer of Applied Geophysical Experience) REU program AN - 1734263937; 2015-108667 AB - The SAGE program was initiated in 1983 to provide an applied geophysics research and education experience for students. Since 1983, 820 students have completed the SAGE summer program. Beginning in 1992, with funding from the NSF, SAGE has included an REU (Research Experience for Undergraduates) experience for selected undergraduate students from U.S. colleges and universities. Since 1992, 380 undergraduate REU students have completed the SAGE program. The four week, intensive, summer program is based in Santa Fe, New Mexico, and involves students in learning geophysical theory and applications; collection of geophysical field data in the northern Rio Grande Rift area; data processing, modeling and interpretation; and presentation (oral and written) of results of each student's research results. Students (undergraduates, graduates and professionals) and faculty are together on a school campus for the summer program. Successful strategies (developed over the years) of the program include teamwork experience, mentoring of REUs (by faculty and more senior students), cultural interchange due to students from many campuses across the U.S. and international graduate students, including industry visitors who work with the students and provide networking, a capstone experience of the summer program that includes all students making a "professional-meeting" style presentation of their research and submitting a written report, a follow-up workshop for the REU students to enhance and broaden their experience, and providing professional development for the REUs through oral or poster presentations and attendance at a professional meeting. Program challenges include obtaining funding from multiple sources; significant time investment in program management, reporting, and maintaining contact with our many funding sources and industry affiliates; and, despite significant efforts, limited success in recruiting racial and ethnic minority students to the program. JF - American Geophysical Union Fall Meeting AU - Braile, L W AU - Baldridge, W S AU - Pellerin, L AU - Ferguson, J F AU - Bedrosian, P AU - Biehler, S AU - Jiracek, G R AU - Snelson, C M AU - Kelley, S AU - McPhee, D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract ED31A EP - 3429 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734263937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Successes+and+challenges+in+the+SAGE+%28Summer+of+Applied+Geophysical+Experience%29+REU+program&rft.au=Braile%2C+L+W%3BBaldridge%2C+W+S%3BPellerin%2C+L%3BFerguson%2C+J+F%3BBedrosian%2C+P%3BBiehler%2C+S%3BJiracek%2C+G+R%3BSnelson%2C+C+M%3BKelley%2C+S%3BMcPhee%2C+D%3BAnonymous&rft.aulast=Braile&rft.aufirst=L&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Dynamic acousto-elasticity; pressure and frequency dependences in Berea Sandstone AN - 1729846226; 2015-106215 AB - Nonlinear elasticity is studied at the laboratory scale with the goal of understanding observations at earth scales, for instance during strong ground motion, tidal forcing and earthquake slip processes. Here we report frequency and pressure dependences on elasticity when applying dynamic acousto-elasticity (DAE) of rock samples, analogous to quasi-static acousto-elasticity. DAE allows one to obtain the elastic behavior over the entire dynamic cycle, detailing the full nonlinear behavior under tension and compression, including hysteresis and memory effects. We perform DAE on a sample of Berea sandstone subject to 0.5 MPa uniaxial load, with sinusoidal oscillating strain amplitudes ranging from 10-6 to 10-5 and at frequencies from 0.1 to 260 Hz. In addition, the confining pressure is increased stepwise from 0 to 30 MPa. We compare results to previous measurements made at lower (mHz) and higher (kHz) frequencies. Nonlinear elastic parameters corresponding to conditioning effects, third order elastic constants and fourth order elastic constants are quantitatively compared over the pressure and frequency ranges. We observe that the decrease in modulus due to conditioning increases with frequency, suggesting a frequency and/or strain-rate dependence that should be included in nonlinear elastic models of rocks. In agreement with previous measurements, nonlinear elastic effects also decrease with confining pressure, suggesting that nonlinear elastic sources such as micro-cracks, soft bonds and dislocations are turned off as the pressure increases. JF - American Geophysical Union Fall Meeting AU - Riviere, Jacques V AU - Pimienta, L AU - Latour, Soumaya AU - Fortin, Jerome AU - Schubnel, A AU - Johnson, P A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR23B EP - 4346 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729846226?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Dynamic+acousto-elasticity%3B+pressure+and+frequency+dependences+in+Berea+Sandstone&rft.au=Riviere%2C+Jacques+V%3BPimienta%2C+L%3BLatour%2C+Soumaya%3BFortin%2C+Jerome%3BSchubnel%2C+A%3BJohnson%2C+P+A%3BAnonymous&rft.aulast=Riviere&rft.aufirst=Jacques&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Exotic behavior of matter in the deep interiors of exoplanets AN - 1729846031; 2015-106126 AB - Matter at several millions to billions of atmospheres (Mbar to Gbar) pressure is quite common throughout the universe, existing deep inside stars, sub-stellar objects (e.g., brown dwarfs), and planets. At these conditions recent experiments and theory suggest material properties are richer than previously expected, with a structural complexity and core electron chemistry distorting the standard models of extreme density matter. New capabilities now provide the first controlled laboratory-based experiments into this pressure range. Described here are new ramp compression experiments, revealing the mechanical and structural properties of solids to 50 million atmospheres, and shock compression experiments exploring the properties of dense fluids (equation of state and transport) from Mbar to near Gbar pressures. This paper will describe a few recent discoveries for such matter and the potential implications for current planetary models. Prepared by LLNL under Contract DE-AC52-07NA27344 JF - American Geophysical Union Fall Meeting AU - Collins, G W AU - Millot, M A AU - Eggert, J AU - Smith, R AU - Rygg, J R AU - Lazicki, A AU - Coppari, F AU - Fratanduoo, D AU - Ping, Y AU - Swift, D AU - Celliers, P M AU - Kraus, Richard G AU - Braun, D AU - Fernandez Panella, A AU - Hamel, S AU - Doeppner, T AU - Kritcher, A AU - Benedict, L AU - Rudd, R AU - Jeanloz, R AU - Bolme, C AU - Gleason, Arianna E AU - Loubeyre, Paul AU - Brygoo, Stephanie AU - McMahon, M I AU - Ali, S J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR11C EP - 08 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729846031?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Exotic+behavior+of+matter+in+the+deep+interiors+of+exoplanets&rft.au=Collins%2C+G+W%3BMillot%2C+M+A%3BEggert%2C+J%3BSmith%2C+R%3BRygg%2C+J+R%3BLazicki%2C+A%3BCoppari%2C+F%3BFratanduoo%2C+D%3BPing%2C+Y%3BSwift%2C+D%3BCelliers%2C+P+M%3BKraus%2C+Richard+G%3BBraun%2C+D%3BFernandez+Panella%2C+A%3BHamel%2C+S%3BDoeppner%2C+T%3BKritcher%2C+A%3BBenedict%2C+L%3BRudd%2C+R%3BJeanloz%2C+R%3BBolme%2C+C%3BGleason%2C+Arianna+E%3BLoubeyre%2C+Paul%3BBrygoo%2C+Stephanie%3BMcMahon%2C+M+I%3BAli%2C+S+J%3BAnonymous&rft.aulast=Collins&rft.aufirst=G&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Viscoplastic modeling of MgSiO (sub 3) perovskite and periclase aggregates AN - 1729844420; 2015-101170 AB - Plasticity and the subsequent development of crystallographic preferred orientation (CPO) in mantle minerals is important for understanding dynamic processes in the mantle, e.g. the interpretation of seismic anisotropy as a result of CPO developed by mantle convection. Furthermore, plastic behavior of multi-phase polycrystals is still not well understood. A polycrystal plasticity code (VPFFT) with an n-site approach is used to model the development of CPO in a hard magnesium silicate perovskite and a soft periclase aggregate under an applied strain, given certain combinations of active slip systems. Special attention is put to the influence of microstructure and phase hardness contrast on CPO. Preliminary results show that in the case where periclase is surrounding the hard perovskite phase, the deformation concentrates on the soft periclase but the perovskite still develops an appreciable and amount of CPO, in agreement with experimental data. These polycrystal plasticity models are compared to diamond anvil cell experiments in the radial geometry (rDAC) where CPO is recorded as azimuthal variations of intensity along Debye rings in a diffraction pattern. Two different starting materials, enstatite+periclase and olivine, are used for the nucleation of the perovskite and periclase aggregate, microstructures are expected to differ between the two starting materials due to nucleation differences. Preliminary results show that perovskite develops a (001) texture and periclase a stronger (001) maxima. The comparison of VPFFT results with rDAC experiments gives and idea of the relative activities of the various slip systems in this aggregate and help to constrain seismic and geophysical modeling of the lower mantle. JF - American Geophysical Union Fall Meeting AU - Zepeda-Alarcon, E AU - Lebensohn, R AU - Kaercher, P M AU - Wenk, H R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract DI23A EP - 4277 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729844420?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Viscoplastic+modeling+of+MgSiO+%28sub+3%29+perovskite+and+periclase+aggregates&rft.au=Zepeda-Alarcon%2C+E%3BLebensohn%2C+R%3BKaercher%2C+P+M%3BWenk%2C+H+R%3BAnonymous&rft.aulast=Zepeda-Alarcon&rft.aufirst=E&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - In-situ diffraction study of magnetite at simultaneous high pressure and high temperature using synchrotron radiation AN - 1722154145; 2015-097806 AB - Magnetite intertwined with the evolution of human civilizations, and remains so today. It is technologically and scientifically important by virtue of its unique magnetic and electrical properties. Magnetite is a common mineral found in a variety of geologic environments, and plays an important role in deciphering the oxygen evolution in the Earth's atmosphere and its deep interiors. The latter application asks for the knowledge of the thermal and elastic properties of magnetite at high pressures and temperatures, which is currently not available in literature. We have carried out a few in-situ diffraction experiments on magnetite using white synchrotron radiation at beamline X17B2 of National Synchrotron Light Source (NSLS). A DIA module in an 1100-ton press and WC anvils were employed for compression, and diffraction spectra were collected at simultaneous high pressures (P) and temperatures (T) (up to 9 GPa and 900 degrees C). Mixture of amorphous boron and epoxy resin was used as pressure medium, and NaCl as pressure marker. Temperature was recorded by W-Re thermocouples. Commercially purchased magnetite powder and a mixture of the said powder and NaCl (1:1) were used as starting material in separate experiments. Preliminary data analyses have yielded following observations: (1) Charge disordering seen at ambient pressure remains active in current experiments, especially at lower pressures (<6 GPa); (2) Though at each condition potentially complicated by charge disordering process, isothermal compression curves remains simple and reproducible; (3) During cooling, the reversibility and degree of cation disordering depend on the starting material and/or experimental P-T path; and (4) cation disordering notably reduces the apparent bulk moduli of magnetite. JF - American Geophysical Union Fall Meeting AU - Wang, Liping AU - Zhang, Jianzhong AU - Wang, Shanmin AU - Chen, Haiyan AU - Zhao, Yusheng AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR33A EP - 4343 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722154145?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=In-situ+diffraction+study+of+magnetite+at+simultaneous+high+pressure+and+high+temperature+using+synchrotron+radiation&rft.au=Wang%2C+Liping%3BZhang%2C+Jianzhong%3BWang%2C+Shanmin%3BChen%2C+Haiyan%3BZhao%2C+Yusheng%3BAnonymous&rft.aulast=Wang&rft.aufirst=Liping&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - Deformation of (Mg,Fe) ferropericlase to temperatures of 1150 K and pressures of 96 GPa; implications for mantle flow and seismic anisotropy AN - 1722154134; 2015-097771 AB - Ferropericlase (Mg,Fe)O is thought to be the second most abundant mineral in Earth's lower mantle. Due to its potentially weak rheological behavior it may play a key role in controlling rheology of the lower mantle and in generating seismic anisotropy. At pressures between approximately 40 GPa and 70 GPa at 300 K, the ferrous iron in ferropericlase undergoes a spin crossover from high-spin to low-spin state. Our understanding of the deformation behavior of both high- and low-spin ferropericlase is incomplete, particularly at high-temperatures. The only published deformation study on (Mg,Fe)O through the spin transition pressure region has limited pressure resolution and was measured at 300 K. Here, we present new results from synchrotron radial x-ray diffraction measurements on the deformation behavior of (Mg,Fe)O at high-pressures, covering the spin crossover pressure range, and high-temperatures. One set of experiments was performed on (Mg0.8-0.9Fe0.1-0.2)O at the Advanced Light Source (Lawrence Berkeley National Laboratory) up to 96 GPa at 300 K. A second suite of data were collected at the Extreme Conditions Beamline of PETRA III (DESY), where (Mg0.8Fe0.2)O was compressed at constant temperature to 70 GPa (at 850 K) and 40 GPa (at 1150 K). In all experiments, pressure was remotely increased using a gas membrane system, which allows for obtaining a very fine pressure resolution. From our data, we calculate the yield strength of ferropericlase, which we find to increase by a factor of about three throughout the lower mantle. Furthermore, we infer likely slip system activities of ferropericlase in Earth's lower mantle based on our experimental data and elastic viscoplastic self-consistent (EVPSC) modelling. We will discuss the effect of the increase of ferropericlase strength on the fate of subducting slabs and we will show potential implications for seismic anisotropy observations in D", where low-spin ferropericlase is characterized by very large elastic anisotropy. JF - American Geophysical Union Fall Meeting AU - Marquardt, Hauke AU - Miyagi, Lowell M AU - Speziale, S AU - Liermann, H P AU - Merkel, Sebastien AU - Tome, C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR24A EP - 08 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722154134?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Deformation+of+%28Mg%2CFe%29+ferropericlase+to+temperatures+of+1150+K+and+pressures+of+96+GPa%3B+implications+for+mantle+flow+and+seismic+anisotropy&rft.au=Marquardt%2C+Hauke%3BMiyagi%2C+Lowell+M%3BSpeziale%2C+S%3BLiermann%2C+H+P%3BMerkel%2C+Sebastien%3BTome%2C+C%3BAnonymous&rft.aulast=Marquardt&rft.aufirst=Hauke&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - An ice sheet model initialization procedure for smooth coupling with climate forcing AN - 1722154127; 2015-097716 AB - In order to perform transient simulations of ice sheet evolution, a spin up of several thousands of years is usually required to obtain an initial state for which the ice sheet model is close to thermo-mechanical equilibrium. Using this approach, however, the final ice sheet geometry will likely be significantly different from that of the present-day, which will strongly impact forward model simulations, in particular those targeting a short (50-100 years) period of time. To mitigate this problem, we propose an adjoint-based optimization algorithm for the ice sheet initialization, in which we minimize the mismatch with observed surface velocity data and between the surface mass balance forcing and the modeled flux divergence. We invert for basal topography and basal friction fields simultaneously, and use the first-order Stokes approximation. We provide results for the Greenland ice sheet and also compare our proposed approach to the more widely used approach of matching surface velocity data only, by inverting for basal friction parameters. Also, we compute the sensitivity of integral quantities like the total ice discharge flux with respect to spatial changes in the basal friction or the basal topography. Current and future work will focus on modeling uncertainties of the optimized basal sliding parameters using the inverse of the Hessian as an approximation for the covariance of the parameter distribution. JF - American Geophysical Union Fall Meeting AU - Perego, Mauro AU - Price, S F AU - Stadler, Georg AU - Kalashnikova, I AU - Salinger, A AU - Jakeman, J AU - Eldred, M AU - Jackson, Charles AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C53D EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722154127?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=An+ice+sheet+model+initialization+procedure+for+smooth+coupling+with+climate+forcing&rft.au=Perego%2C+Mauro%3BPrice%2C+S+F%3BStadler%2C+Georg%3BKalashnikova%2C+I%3BSalinger%2C+A%3BJakeman%2C+J%3BEldred%2C+M%3BJackson%2C+Charles%3BAnonymous&rft.aulast=Perego&rft.aufirst=Mauro&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - Molecular mixtures of relevance to planetary interiors AN - 1722153973; 2015-097792 AB - Many extra-solar planets are expected to have interiors similar to that of Neptune and Uranus. Yet, our knowledge of the inner workings of Neptune and Uranus is incomplete. Additionally, the compositions of these newly found planets will not be identical to either Neptune or Uranus. Therefore, rather than compute the EOS for each possible planetary interior, it behooves us to understand the general behavior of mixtures relevant to these interiors. We present the results of varying the concentration ratios in a mixture of Methane, Ammonia, and Water at a density of 3.0 g/cc using quantum molecular dynamics simulations. We show the onset of a superionic phase of the mixtures occurs for all mixing ratios below a temperature of 4,000 K. Additionally, we study the EOS and diffusive properties of one particular mixture along an isentrope of Uranus. JF - American Geophysical Union Fall Meeting AU - Meyer, E R AU - Ticknor, C AU - Collins, L AU - Kress, J AU - Bethkenhagen, Mandy AU - Hamel, S AU - Redmer, Ronald AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR33A EP - 4329 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722153973?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Molecular+mixtures+of+relevance+to+planetary+interiors&rft.au=Meyer%2C+E+R%3BTicknor%2C+C%3BCollins%2C+L%3BKress%2C+J%3BBethkenhagen%2C+Mandy%3BHamel%2C+S%3BRedmer%2C+Ronald%3BAnonymous&rft.aulast=Meyer&rft.aufirst=E&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - Effects of spatial and temporal resolution on simulated feedbacks from polygonal tundra AN - 1718054217; 2015-095696 AB - Earth system land models typically resolve permafrost regions at spatial resolutions grossly larger than the scales of topographic variation. This observation leads to two critical questions: How much error is introduced by this lack of resolution, and what is the effect of this approximation on other coupled components of the Earth system, notably the energy balance and carbon cycle? Here we use the Arctic Terrestrial Simulator (ATS) to run micro-topography resolving simulations of polygonal ground, driven by meteorological data from Barrow, AK, to address these questions. ATS couples surface and subsurface processes, including thermal hydrology, surface energy balance, and a snow model. Comparisons are made between one-dimensional "column model" simulations (similar to, for instance, CLM or other land models typically used in Earth System models) and higher-dimensional simulations which resolve micro-topography, allowing for distributed surface runoff, horizontal flow in the subsurface, and uneven snow distribution. Additionally, we drive models with meteorological data averaged over different time scales from daily to weekly moving windows. In each case, we compare fluxes important to the surface energy balance including albedo, latent and sensible heat fluxes, and land-to-atmosphere long-wave radiation. Results indicate that spatial topography variation and temporal variability are important in several ways. Snow distribution greatly affects the surface energy balance, fundamentally changing the partitioning of incoming solar radiation between the subsurface and the atmosphere. This has significant effects on soil moisture and temperature, with implications for vegetation and decomposition. Resolving temporal variability is especially important in spring, when early warm days can alter the onset of snowmelt by days to weeks. We show that high-resolution simulations are valuable in evaluating current land models, especially in areas of polygonal ground. This work was supported by LANL Laboratory Directed Research and Development Project LDRD201200068DR and by the The Next-Generation Ecosystem Experiments (NGEE Arctic) project. NGEE-Arctic is supported by the Office of Biological and Environmental Research in the DOE Office of Science. LA-UR-14-26227. JF - American Geophysical Union Fall Meeting AU - Coon, E AU - Atchley, Adam L AU - Painter, S L AU - Karra, S AU - Moulton, J D AU - Wilson, C J AU - Liljedahl, A K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C14A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054217?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Effects+of+spatial+and+temporal+resolution+on+simulated+feedbacks+from+polygonal+tundra&rft.au=Coon%2C+E%3BAtchley%2C+Adam+L%3BPainter%2C+S+L%3BKarra%2C+S%3BMoulton%2C+J+D%3BWilson%2C+C+J%3BLiljedahl%2C+A+K%3BAnonymous&rft.aulast=Coon&rft.aufirst=E&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Measured hydrologic storage characteristics of three major ice wedge polygon types, Barrow, Alaska AN - 1718054123; 2015-095646 AB - Model simulations have suggested that the hydrologic fluxes and stores of Arctic wetlands are constrained by the micro-topographical features of ice wedge polygons, which are abundant in lowland tundra landscapes. Recently observed changes in ice wedge polygon landscapes--in particular, ice wedge degradation and trough formation--emphasize the need to better understand how differing ice wedge polygon morphologies affect the larger hydrologic system. Here we present three seasons of measured end-of-winter snow accumulation, continuous soil moisture and water table elevations, and repeated frost table mapping. Together, these describe the hydrologic characteristics of three main ice wedge polygon types: low centered polygons with limited trough development (representative of a approximately 500 year old vegetated drained thaw lake basin), and low- and high-centered polygons with well-defined troughs. Dramatic spatiotemporal variability exists both between polygon types and between the features of an individual polygon (e.g. troughs, centers, rims). Landscape-scale end-of-winter snow water equivalent is similar between polygon types, while the sub-polygon scale distribution of the surface water differs, both as snow and as ponded water. Some sub-polygon features appear buffered against large variations in water levels, while others display periods of prolonged recessions and large responses to rain events. Frost table elevations in general mimic the ground surface topography, but with spatiotemporal variability in thaw rate. The studied thaw seasons represented above long-term average rainfall, and in 2014, record high June precipitation. Differing ice wedge polygon types express dramatically different local hydrology, despite nearly identical climate forcing and landscape-scale snow accumulation, making ice wedge polygons an important component when describing the Arctic water, nutrient and energy system. JF - American Geophysical Union Fall Meeting AU - Chamberlain, A J AU - Liljedahl, A K AU - Wilson, C J AU - Cable, W AU - Romanovsky, V E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C11C EP - 0383 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054123?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Measured+hydrologic+storage+characteristics+of+three+major+ice+wedge+polygon+types%2C+Barrow%2C+Alaska&rft.au=Chamberlain%2C+A+J%3BLiljedahl%2C+A+K%3BWilson%2C+C+J%3BCable%2C+W%3BRomanovsky%2C+V+E%3BAnonymous&rft.aulast=Chamberlain&rft.aufirst=A&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Effects of soil property uncertainty on projected active layer thickness AN - 1718054102; 2015-095645 AB - Uncertainty in future climate is often assumed to contribute the largest uncertainty to active layer thickness (ALT) projections. However, the impact of soil property uncertainty on these projections may be significant. In this research, we evaluate the contribution of soil property uncertainty on ALT projections at the Barrow Environmental Observatory, Alaska. The effect of variations in porosity, thermal conductivity, saturation, and water retention properties of peat and mineral soil are evaluated. The micro-topography of ice wedge polygons present at the site is included in the analysis using three 1D column models to represent polygon center, rim and trough features. The Arctic Terrestrial Simulator (ATS) is used to model multiphase thermal and hydrological processes in the subsurface. We apply the Null-Space Monte Carlo (NSMC) algorithm to identify an ensemble of soil property combinations that produce simulated temperature profiles that are consistent with temperature measurements available from the site. ALT is simulated for the ensemble of soil property combinations for four climate scenarios. The uncertainty in ALT due to soil properties within and across climate scenarios is evaluated. This work was supported by LANL Laboratory Directed Research and Development Project LDRD201200068DR and by the The Next-Generation Ecosystem Experiments (NGEE Arctic) project. NGEE-Arctic is supported by the Office of Biological and Environmental Research in the DOE Office of Science. JF - American Geophysical Union Fall Meeting AU - Harp, Dylan R AU - Atchley, Adam L AU - Coon, E AU - Painter, S L AU - Wilson, C J AU - Romanovsky, V E AU - Liljedahl, A K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C11C EP - 0382 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054102?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Effects+of+soil+property+uncertainty+on+projected+active+layer+thickness&rft.au=Harp%2C+Dylan+R%3BAtchley%2C+Adam+L%3BCoon%2C+E%3BPainter%2C+S+L%3BWilson%2C+C+J%3BRomanovsky%2C+V+E%3BLiljedahl%2C+A+K%3BAnonymous&rft.aulast=Harp&rft.aufirst=Dylan&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Using observational data to inform physically based models of subsurface thermal hydrology properties and active layer thickness at the Barrow environmental observatory, Alaska AN - 1718054048; 2015-095644 AB - Climate change is profoundly impacting permafrost regions and reshaping carbon rich tundra ecosystems from carbon sinks to potential carbon sources triggering a positive feedback to climate change. The annual maximum depth of ice-free soil with above 0 degrees C temperatures, which is known as the active-layer thickness (ALT), determines the volume of carbon-rich stores available for decomposition and therefore potential greenhouse gas release into the atmosphere. Despite the increased vulnerability of permafrost regions to climate change, predictive tools and precise parameterization of physical characteristics to estimate projected ALT in tundra ecosystems have been developed slowly and often are not adequately representing natural systems due to the complex nature of corresponding atmospheric-surface-subsurface hydrological and energy interactions undergoing freeze-thaw dynamics. A model-observation-experiment process (ModEx) is employed to generate three 1D models representing characteristic micro-topographical land-formations, which are capable of simulating present ALT from current climate conditions. Observational soil temperature data from a tundra site located near Barrow, AK is used to calibrate thermal properties of moss, peat, and sandy loam soil to be used in the multiphysics Arctic Terrestrial Simulator (ATS) models. In the process of calibration and model formulation key physical processes and appropriate model parameters are identified, which showcases the importance of correctly representing physical processes and reformulating models based on observational data. Iterative execution of the ModEx concept identified key processes that control thermal propagation into the subsurface: 1) physical representation of thermal conduction, 2) liquid, ice, and gas partitioning in the subsurface, 3) snowpack distribution and dynamics, and 4) precipitation delivery of water to the surface/subsurface. This work was supported by LANL Laboratory Directed Research and Development Project LDRD201200068DR and by the The Next-Generation Ecosystem Experiments (NGEE Arctic) project. NGEE-Arctic is supported by the Office of Biological and Environmental Research in the DOE Office of Science. JF - American Geophysical Union Fall Meeting AU - Atchley, Adam L AU - Harp, Dylan R AU - Painter, S L AU - Coon, E AU - Wilson, C J AU - Romanovsky, V E AU - Liljedahl, A K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C11C EP - 0381 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054048?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Using+observational+data+to+inform+physically+based+models+of+subsurface+thermal+hydrology+properties+and+active+layer+thickness+at+the+Barrow+environmental+observatory%2C+Alaska&rft.au=Atchley%2C+Adam+L%3BHarp%2C+Dylan+R%3BPainter%2C+S+L%3BCoon%2C+E%3BWilson%2C+C+J%3BRomanovsky%2C+V+E%3BLiljedahl%2C+A+K%3BAnonymous&rft.aulast=Atchley&rft.aufirst=Adam&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Variations in evapotranspiration fluxes across geomorphological units and plant functional types in a polygonal-structure tundra in Barrow, Alaska AN - 1718054011; 2015-095647 AB - Although the landscape in tundra ecosystems is relatively flat, and the vegetation is typically shorter than 10 cm, micro-topographical changes within the polygonal structure produce spatial heterogeneity in the form of permafrost depth, soil temperature, soil moisture, and wind speed. Plants react to these conditions and form linkages with the landscape. For example, mosses occupy the wet troughs and lichens are more abundant in the drier high-centred polygons. We conducted measurements in a polygonal-structure tundra site at Barrow, Alaska, to investigate the interconnections between evapotranspiration fluxes, geomorphology and plant cover, during two consecutive years. Fluxes were measured at three spatial and temporal scales: (1) Eddy covariance flux tower, (2) Continuous, fixed, surface clear chamber, and (3) Discontinuous measurements with mobile chambers in approximately 60 locations across the landscape. Our results indicate that different environmental conditions (soil moisture, soil temperature, wind speed, and thaw depth) and plant community composition, driven by microtopographical features, have significant influences on soil greenhouse gas and energy fluxes. Among plant types, evapotranspiration fluxes from moss-covered and inundated areas were more than twice those from other plant types. Continuous chamber measurements were similar in trend and values to eddy-covariance measurements, implying on the high contribution of surface fluxes to atmospheric concentrations. However, wind direction influenced the upscaling of fluxes from chamber to tower, because maritime winds had different moisture content and temperature than terrestrial winds. Microclimate was also affected by microtopography, and wind speed was higher on polygon ridges, and lower in the more protected trough areas, affecting evapotranspiration fluxes. In addition, we observed a strong seasonal trend in fluxes. During peak summer, although 24-hour daylight occurs, our results indicated substantial diurnal variations, despite constant daylight conditions. Information gathered in this research has advance our understanding of coupled processes in Arctic terrestrial ecosystems, and will be used to improve climate model predictions for this already rapidly changing ecosystem. JF - American Geophysical Union Fall Meeting AU - Raz Yaseef, N AU - Young, J M AU - Rahn, T A AU - Newman, B D AU - Torn, M S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C11C EP - 0385 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054011?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Variations+in+evapotranspiration+fluxes+across+geomorphological+units+and+plant+functional+types+in+a+polygonal-structure+tundra+in+Barrow%2C+Alaska&rft.au=Raz+Yaseef%2C+N%3BYoung%2C+J+M%3BRahn%2C+T+A%3BNewman%2C+B+D%3BTorn%2C+M+S%3BAnonymous&rft.aulast=Raz+Yaseef&rft.aufirst=N&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Catching the wave; observing the inland propagation of dynamic thinning in Greenland AN - 1718053644; 2015-095717 AB - Gas diffusion through the ice lattice is an important process, for 1) evaluating the integrity of the ice core trapped gas record of past atmospheres, 2) making corrections for fractionation that occurs as air bubbles close off at the base of the firn, 3) the possible use of that fractionation as an astronomical dating tool for ice cores (e.g. O (sub 2) /N (sub 2) ), and 4) interpreting firn air records of atmospheric H (sub 2) over the past century. Laboratory studies of gas diffusion and permeation through ice are difficult due to the long timescales involved. An alternative approach is to sample air from the firn layer on top of polar ice sheets, and measure the in situ enrichment of small-diameter molecules such as neon, O (sub 2) , and argon due to the close-off fractionation. We have measured firn air depth profiles of these gases at six polar sites spanning a wide range of temperature. Under the assumption that differential gas permeation through the ice lattice is responsible for the fractionation, and using published values for the O (sub 2) and N (sub 2) coefficients, we have inferred the neon and argon permeation coefficients. The permeation coefficients of both gases increase monotonically with site temperature, as expected, due to the Arrhenius-type temperature activation of diffusion through ice. The activation energy of argon (with a diameter of 3.54 Aa) is 1.5 times that of neon (diameter 2.82 Aa), consistent with the view that large diameter molecules diffuse via the breaking of hydrogen bonds in the ice lattice, which is highly temperature sensitive (Ikeda-Fukazawa et al., 2005). In contrast, small molecules diffuse primarily by the interstitial mechanism, which involves hops through the intact lattice, a process that is only weakly temperature sensitive. JF - American Geophysical Union Fall Meeting AU - Howat, I M AU - de la Pena, S AU - Price, S F AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C24B EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718053644?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Catching+the+wave%3B+observing+the+inland+propagation+of+dynamic+thinning+in+Greenland&rft.au=Howat%2C+I+M%3Bde+la+Pena%2C+S%3BPrice%2C+S+F%3BAnonymous&rft.aulast=Howat&rft.aufirst=I&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Quantitative fabric analysis of eclogite facies mylonites; texture and microtomography AN - 1707522667; 2015-081795 AB - Understanding the flow of rock deformed under eclogite facies conditions is crucial to constraint the dynamics of a subducting slab. Prograde metamorphism during burial in a subduction zone proceeds across several lithologies, resulting in heterogeneous eclogitization and potentially different processes. In order to explore the expression of such a variety in terms of a deformative fabric, we have analyzed texture and shape fabric of eclogites and eclogitic orthogneisses from the Malpica-Tui unit (NW Spain). We explore the same rock volumes with TOF-neutron diffraction (HIPPO @LANSCE) and synchrotron microtomography (SYRMEP @Elettra). Orientation distribution functions were extracted after Rietveld refinement in MAUD and morphometric data (size, aspect ratio, orientation) were obtained after image processing with FIJI, Blob3D and MATLAB. Shape fabric reflects the macroscopic foliation and lineation and correlates with texture. Garnet fabric is particularly important because of the rheological implications of its mechanical behavior. Garnet shows little elongation in both samples, and texture is significant, what probably points to a relatively dry deformative environment, with diffusion-assisted dislocation. This eclogites could represent a rigidification stage in the subduction channel preserved during the exhumation at high-P and high-T documented in the Malpica-Tui unit during the Variscan orogeny. JF - American Geophysical Union Fall Meeting AU - Gomez Barreiro, Juan AU - Voltolini, Marco AU - Martinez-Catalan, Jose R AU - Benitez-Perez, Jose Manuel AU - Diez-Fernandez, Ruben AU - Wenk, Hans-Rudolf AU - Vogel, Sven C AU - Mancini, Lucia AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract T31A EP - 4564 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707522667?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Quantitative+fabric+analysis+of+eclogite+facies+mylonites%3B+texture+and+microtomography&rft.au=Gomez+Barreiro%2C+Juan%3BVoltolini%2C+Marco%3BMartinez-Catalan%2C+Jose+R%3BBenitez-Perez%2C+Jose+Manuel%3BDiez-Fernandez%2C+Ruben%3BWenk%2C+Hans-Rudolf%3BVogel%2C+Sven+C%3BMancini%2C+Lucia%3BAnonymous&rft.aulast=Gomez+Barreiro&rft.aufirst=Juan&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Microseismicity and temporal changes in seismic velocity reveal crustal response to dynamic stress AN - 1703691258; 2015-078721 AB - Earthquake occurrence is both a driver of and the result of complexity in the stress field and elastic properties of the crust. If we understand how static and dynamic stresses perturb the crust, we can use these observations to better understand the current state of the crust. Here we focus on how the crust responds to dynamic stresses outside the region where static stresses are important. A tool to understand the current state of the crust has broad applications in seismic hazards, induced seismicity, and a general understanding of earthquake physics. As dynamic strains outside of the near field of an earthquake are small, often no more than a micro strain, we need sensitive measures to detect any resulting perturbations to the properties of the crust. Two methods we currently use are (i) measuring temporal changes in seismic velocities applying ambient noise, and (ii) measuring the spatiotemporal change in microseismic activity. A strength of using ambient noise to detect changes in seismic velocities is the ability to stack over space and time to reveal very small changes. We use microseismicity because there are many more small earthquakes than large ones, so more robust statistics can be applied to small earthquakes-applying microseismicity improves the detection of changes within the crust. A striking observation applying these methods is widespread increased seismicity and a transient increase in seismic velocities in Japan after the passage of surface waves from the 2012 M8.6 Indian Ocean earthquake. The velocity observations are obtained by stacking 113 Hinet stations and using 10-day windows. The velocity change extends to at least 5 km depth based on the spatial wavelengths employed (0.1-5 Hz). Based on our field observations and those of others, as well as our laboratory studies one may expect a decrease in the crustal velocity from wave dynamics. The observed increase in velocity could be an indirect effect such that frictional contacts stiffen under changing quasi-static stress conditions in the presence of an increase in microseismicity. Alternatively, an increase in velocity may suggest that weak motions strengthen frictional contacts within the crust, whereas those contacts are slightly destabilized under ambient conditions. JF - American Geophysical Union Fall Meeting AU - Delorey, A A AU - Johnson, P A AU - Chao, K AU - Obara, K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S52C EP - 08 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703691258?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Microseismicity+and+temporal+changes+in+seismic+velocity+reveal+crustal+response+to+dynamic+stress&rft.au=Delorey%2C+A+A%3BJohnson%2C+P+A%3BChao%2C+K%3BObara%2C+K%3BAnonymous&rft.aulast=Delorey&rft.aufirst=A&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - Spatiotemporal structure of a coupled continuum-granular earthquake experiment AN - 1703690292; 2015-078715 AB - Earthquake faults are complicated and hard to access experimentally. To complement field studies, laboratory and numerical models that focus on the universal features of natural earthquakes are extremely valuable. We have developed a laboratory experiment that includes sheared elastic plates separated by a narrow gap filled with a quasi-two-dimensional granular material. Local measurement of strain displacements of the plates at over 400 spatial points located adjacent to the gap allows direct determination of the moments and their spatial and temporal distributions. We show that events consist of laterally coherent, larger motions that we label as "brittle" events and spatially distributed, smaller "non-brittle" events. The non-brittle events have a probability distribution of event moment consistent with an M (super -3/2) power law scaling and a Poisson distributed recurrence time distribution. Brittle events have a broad, log-normal moment distribution and a mean repetition time. As the applied normal force increases, there are fractionally more (less) brittle (non-brittle) events, and the brittle moment distribution broadens. The magnitude of the slip motion of the plates is well correlated with the RMS displacements of the granular matter. Our results are consistent with mean field descriptions of statistical models of earthquakes and avalanches. JF - American Geophysical Union Fall Meeting AU - Ecke, R E AU - Geller, D AU - Backhaus, S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S52C EP - 02 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703690292?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Spatiotemporal+structure+of+a+coupled+continuum-granular+earthquake+experiment&rft.au=Ecke%2C+R+E%3BGeller%2C+D%3BBackhaus%2C+S%3BAnonymous&rft.aulast=Ecke&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - Detecting small earthquakes on remote oceanic transform faults AN - 1700098705; 2015-073744 AB - Although oceanic transform faults (OTF) constitute a small fraction of the total plate boundary area, better constraints on OTF tectonic parameters (e.g. fault length, slip rate, thermal structure) compared to other tectonic boundaries make OTFs a useful focus of the investigation of earthquake processes. The large fraction of aseismic deformation that accompanies OTF earthquakes also makes them an interesting target for exploring the interaction of creep with slow and quick earthquakes. Because most typical OTFs are quite remote, even indirectly observing these deformation processes is a serious challenge. Standard teleseismic analysis methods have yielded valuable constraints on the first-order characteristics of moderate-to-large magnitude OTF earthquakes, but fundamental questions regarding rupture length and area as well as rupture-front propagation speed remain unknown in these systems. Even identifying the smaller-magnitude activity that often provides clues to some of these quantities is difficult. Short-period seismic arrays at least occasionally provide information suitable for locations of small (mb<4.0) earthquakes along Mid-Atlantic transforms such as the Romanche and Chain. In this work, we explore the possibility of detecting smaller earthquakes along remote OTFs using waveform-based comparisons (e.g. cross correlations) of template signals with the continuous seismic wavefield for seismic stations surrounding several OTFs. We examine our ability to detect these small events using a range of frequency bands from short-to-intermediate periods and investigating effective approaches for identifying small-magnitude events along remote OTFs. Preliminary results suggest that at least some small events can be identified using simple waveform templates. Our goal is to construct a metric that will produce acceptable false-alarm rates and that will allow us to visually confirm detections and extend the seismicity catalogs along OTFs to lower magnitude threshold and allow us to continue to investigate OTF deformation processes using remote seismic observations. JF - American Geophysical Union Fall Meeting AU - Vieceli, R AU - Ammon, Charles J AU - Cleveland, Mike AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract T41B EP - 4607 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700098705?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Detecting+small+earthquakes+on+remote+oceanic+transform+faults&rft.au=Vieceli%2C+R%3BAmmon%2C+Charles+J%3BCleveland%2C+Mike%3BAnonymous&rft.aulast=Vieceli&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Remote imaging of earthquake characteristics along oceanic transforms AN - 1700098526; 2015-073743 AB - Compared with subduction and continental transform systems, many characteristics of oceanic transform faults (OTF) are better defined (first-order structure and composition, thermal properties, etc.). Still, many aspects of earthquake behavior along OTFs remain poorly understood as a result of their relative remoteness. But the substantial aseismic deformation (averaging roughly 85%) that occurs along OTFs and the implied interaction of aseismic with seismic deformation is an opportunity to explore fundamental earthquake nucleation and rupture processes. However, the study of OTF earthquake properties is not easy because these faults are often located in remote regions, lacking nearby seismic networks. Thus, many standard network-based seismic approaches are infeasible, but some can be adapted to the effort. For example, double-difference methods applied to cross-correlation measured Rayleigh wave time shifts is an effective tool to provide greatly improved relative epicentroid locations, origin-time shifts, and relative event magnitudes for earthquakes in remote regions. The same comparative waveform measurements can provide insight into rupture directivity of the larger OTF events. In this study, we calculate improved relative earthquake locations and magnitudes of earthquakes along the Blanco Fracture Zone in the northeast Pacific Ocean and compare and contrast that work with a study of the more remote Menard Transform Fault (MTF), located in the southeast Pacific Ocean. For the Blanco, we work exclusively with Rayleigh (R1) observations exploiting the dense networks in the northern hemisphere. For the MTF, we combine R1 with Love (G1) observations to map and to analyze the distribution of strong asperities along this remote, 200-km-long fault. Specifically, we attempt to better define the relationship between observed near-transform normal and vertical strike-slip earthquakes in the vicinity of the MTF. We test our ability to use distant observations (the closest station is about 2,500 km distant) to constrain rupture characteristics of recent strong earthquakes in the region. We compare the seismicity characteristics along the faults to explore the relationship of fault age and morphology on rupture behavior. JF - American Geophysical Union Fall Meeting AU - Cleveland, Mike AU - Ammon, Charles J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract T41B EP - 4606 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700098526?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Remote+imaging+of+earthquake+characteristics+along+oceanic+transforms&rft.au=Cleveland%2C+Mike%3BAmmon%2C+Charles+J%3BAnonymous&rft.aulast=Cleveland&rft.aufirst=Mike&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Joint inversion of seismic and gravity data for velocity structure and hypocentral locations of the Colombian subduction zone AN - 1696874401; 2015-067707 AB - Joint inversions of geophysical data recover models that simultaneously fit multiple types of constraints while playing upon the various sensitivities of each data type. Here, we combine body wave arrival times with surface wave dispersion measurements and gravity observations to develop a combined 3D P- and S-wave velocity model for the crust and upper mantle of Colombia. P- and S-wave arrival times were obtained for local earthquakes from instruments in the Colombian National Seismic Network. Rayleigh wave dispersion curves were inverted for using a subset of network stations and larger local earthquakes. Gravity observations were extracted from the global satellite-based model EGM2008. Preliminary results using body waves only show reduced velocities beneath the volcanic arc in the upper 25 km of the crust. Crustal velocities are also reduced from the 1D starting model beneath the Eastern Cordillera in the northern half of the country. Relocations of intermediate-depth seismicity clearly indicate a discontinuity in the slab centered 5 degrees N latitude, where the southern portion of the slab is approximately 200 km trenchward of the northern portion, coincident with the termination of arc volcanism and in recent years interpreted as due to a slab tear [Vargas and Mann, 2013]. Seismicity below 100 km depth in the southern portion of the subduction zone is surrounded by a approximately 100-km-thick region of elevated velocities, associated with the subduction of the Nazca Plate, and embedded within a broader region of reduced velocities. The northern portion of the subduction zone at 100 km depth and below is characterized by a broad region of elevated velocities, which may be consistent with a slab of an old, thickened Caribbean Plate origin. The overlapping of the edges of the Nazca and Caribbean slabs may contribute to the seismicity of the Bucaramanga nest. JF - American Geophysical Union Fall Meeting AU - Syracuse, E M AU - Maceira, M AU - Prieto, G A AU - Zhang, H AU - Ammon, Charles J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract T11C EP - 4577 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696874401?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Joint+inversion+of+seismic+and+gravity+data+for+velocity+structure+and+hypocentral+locations+of+the+Colombian+subduction+zone&rft.au=Syracuse%2C+E+M%3BMaceira%2C+M%3BPrieto%2C+G+A%3BZhang%2C+H%3BAmmon%2C+Charles+J%3BAnonymous&rft.aulast=Syracuse&rft.aufirst=E&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Effects of seasonal and secular changes in Antarctic sea ice on microseismic noise AN - 1696873742; 2015-069755 AB - The Earth's background microseism noise spectrum, observed widely across the Earth is commonly dominated between approximately 1-30 seconds period by oceanic wave activity that arises when ocean swell is converted to (predominately) Rayleigh waves. Peak power levels in the microseism band at high-latitude stations typically coincide with large-scale extratropical cyclonic winter storm activity. However, due to the seasonal formation of sea ice around the continental shelves of polar regions, oceanic waves are impeded from efficiently exciting seismic energy, and annual peak microseism power thus occurs prior to the midwinter storm peak. We analyze recently collected Polar Earth Observatory (POLENET/A-NET) and Antarctica's Gamburtsev Province (GAMSEIS) seismic data to characterize the Antarctic microseism signal and its unique seasonality and annual variations in each of three distinct bands: the high-frequency secondary microseism (1-5 s), the secondary microseism (5-10 s) and the primary microseism band (10-20 s). Power in these bands is found to be strongly anti-correlated with sea ice extent. with the shorter period signals being exceptionally sensitive to local conditions. We quantitatively show that the formation of sea ice may be capable of attenuating on-shore microseism power by as much as 90%. Additionally, we note a significant increase in primary microseism power attributable to near coastal Antarctic Peninsula sources during the last twenty years. This increase correlates with regional sea ice loss driven by large-scale wind changes associated with the strengthening of the Southern Annular Mode. Investigation of microseism seasonality, power, and decadal-scale trends in the Antarctic shows promise as a spatially integrated tool for monitoring and interpreting such sea ice strength and extent, metrics through time. JF - American Geophysical Union Fall Meeting AU - Anthony, R E AU - Aster, Richard C AU - Rowe, C A AU - Wiens, Doug A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S44A EP - 07 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696873742?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Effects+of+seasonal+and+secular+changes+in+Antarctic+sea+ice+on+microseismic+noise&rft.au=Anthony%2C+R+E%3BAster%2C+Richard+C%3BRowe%2C+C+A%3BWiens%2C+Doug+A%3BAnonymous&rft.aulast=Anthony&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Moment tensor descriptions for simulated explosions of the source physics experiment (SPE) AN - 1696873403; 2015-069762 AB - In this research we seek to understand damage mechanisms governing the behavior of geo-materials in the explosion source region, and the role they play in seismic-wave generation. Numerical modeling tools can be used to describe these mechanisms through the development and implementation of appropriate material models. Researchers at Los Alamos National Laboratory (LANL) have been working on a novel continuum-based-viscoplastic strain-rate-dependent fracture material model, AZ (sub F) rac, in an effort to improve the description of these damage sources. AZ (sub F) rac has the ability to describe continuum fracture processes, and at the same time, to handle pre-existing anisotropic material characteristics. The introduction of fractures within the material generates further anisotropic behavior that is also accounted for within the model. The material model has been calibrated to a granitic medium and has been applied in a number of modeling efforts under the SPE project. In our modeling, we use a 2D, axisymmetric layered earth model of the SPE site consisting of a weathered layer on top of a half-space. We couple the hydrodynamic simulation code with a seismic simulation code and propagate the signals to distances of up to 2 km. The signals are inverted for time-dependent moment tensors using a modified inversion scheme that accounts for multiple sources at different depths. The inversion scheme is evaluated for its resolving power to determine a centroid depth and a moment tensor description of the damage source. The capabilities of the inversion method to retrieve such information from waveforms recorded on three SPE tests conducted to date are also being assessed. JF - American Geophysical Union Fall Meeting AU - Yang, X AU - Rougier, E AU - Knight, E E AU - Patton, H J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S44B EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696873403?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Moment+tensor+descriptions+for+simulated+explosions+of+the+source+physics+experiment+%28SPE%29&rft.au=Yang%2C+X%3BRougier%2C+E%3BKnight%2C+E+E%3BPatton%2C+H+J%3BAnonymous&rft.aulast=Yang&rft.aufirst=X&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Gravity and seismic investigations of the Santo Domingo basin, Rio Grande Rift, New Mexico AN - 1692743632; 2015-065116 AB - The SAGE (Summer of Applied Geophysical Experience) program collected new gravity, seismic, electromagnetic and down-hole temperature data in 2014 in the Santo Domingo Basin and adjacent areas of the Rio Grande Rift (RGR) area of northern New Mexico. The SAGE 2014 data collection was part of an integrated geophysical study of the area initiated in 2010 and adds data and interpretations to a W to E transect of the RGR. The transect includes previous SAGE seismic refraction and CMP reflection profiles recorded in 2010 and 2011, some industry seismic reflection data, and detailed gravity observations. Seismic data consisted of a 4.8 km NW to SE profile (120 three-component stations in four overlapping deployments, 20 m station spacing, using a Vibroseis source--20 m spacing for reflection VPs; 800 m spacing for refraction VPs) along the Borrego Canyon road with both refraction and CMP reflection coverage. About 50,000 seismograms were recorded. The surface conditions (dry unconsolidated sediments) increased surface wave energy and limited the signal-to-noise level of reflection arrivals although some wide-angle reflections with two-way times as great as 1.8 s were visible. The refraction data were modeled with first arrival travel time methods and mainly helped identify the velocity and minimum thickness of the Tertiary Santa Fe group sedimentary rocks in the Santo Domingo Basin. Interpretation of the seismic and gravity data along the transect was aided by refraction velocities, the existence of a nearby regional seismic reflection profile from industry, and lithologies and well-logs from a deep well. Gravity modeling, with significant control on depths of interfaces and densities from the seismic and drill hole data, indicates that the Santo Domingo sedimentary basin has a total depth of about 6 km. JF - American Geophysical Union Fall Meeting AU - Braile, L W AU - Ferguson, J F AU - Boucher, C AU - Novitsky, C G AU - O'Shea, P M AU - Daves, J AU - Marzen, R AU - Mendoza, Kevin AU - Rasmussen, Tyler W AU - Wei, W AU - Baldridge, W S AU - Biehler, S AU - Claytor, J M AU - Bischoff, S H AU - Ranasinghe, N R AU - Corredor, Andres AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract T43C EP - 4753 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692743632?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Gravity+and+seismic+investigations+of+the+Santo+Domingo+basin%2C+Rio+Grande+Rift%2C+New+Mexico&rft.au=Braile%2C+L+W%3BFerguson%2C+J+F%3BBoucher%2C+C%3BNovitsky%2C+C+G%3BO%27Shea%2C+P+M%3BDaves%2C+J%3BMarzen%2C+R%3BMendoza%2C+Kevin%3BRasmussen%2C+Tyler+W%3BWei%2C+W%3BBaldridge%2C+W+S%3BBiehler%2C+S%3BClaytor%2C+J+M%3BBischoff%2C+S+H%3BRanasinghe%2C+N+R%3BCorredor%2C+Andres%3BAnonymous&rft.aulast=Braile&rft.aufirst=L&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Revisiting the ridge-push force using the lithospheric geoid AN - 1692741271; 2015-065100 AB - The geoid anomaly and driving force associated with the cooling oceanic lithosphere ("ridge push") are both proportional to dipole moment of the density-depth distribution, and allow a reevaluation of the ridge push force using the geoid. The challenge with this approach is to isolate the "lithospheric geoid" from the full geoid signal. Our approach is to use a band-pass spherical harmonic filter on the full geoid (e.g., EGM2008-WGS84, complete to spherical harmonic degree and order 2159) between orders 6 and 80. However, even this "lithospheric geoid" is noisy, and thus we average over 100 profiles evenly spaced along the global ridge system to obtain an average geoid step associated with the mid-ocean ridges. Because the positive ridge geoid signal is largest near the ridge (and to capture fast-spreading ridges), we evaluate symmetrical profiles extending + or -45 m.y. about the ridge. We find an average ridge geoid anomaly of 4.5 m, which is equivalent to a 10 m anomaly for 100 m.y. old oceanic lithosphere. This geoid step corresponds to a ridge push force of approximately 2.4X1012 N/m for old oceanic lithosphere of 100 m.y., very similar to earlier estimates of approximately 2.5 X1012N/m based on simple half-space models. This simple half-space model also predicts constant geoid slopes of about 0.15 m/m.y. for cooling oceanic lithosphere. Our observed geoid slopes are consistent with this value for ages up to 40-50 m.y., but drop off to lower values at greater ages. We model this using a plate cooling model (with a thickness of the order of 125 km) to fit the observation that the geoid anomaly and ridge driving force only increase slowly for ages greater than 40 m.y. (in contrast to the half-space model where the linear dependence on age holds for all ages). This reduction of the geoid slope results in a 20% decrease in the predicted ridge push force. This decrease is due to the combined effects of treating the oceanic lithosphere as a cooling plate (vs. a half-space), and the loss of geoidal energy required through filtering of the geoid. We evaluate the role of revised ridge push forces with plate-scale stress models. Our revised estimate of the ridge push force based on the lithospheric geoid, and corresponding stress models, further emphasizes the "active" rather than "passive" nature of the plates themselves in plate tectonics. JF - American Geophysical Union Fall Meeting AU - Richardson, R M AU - Coblentz, D D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract T43C EP - 4737 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692741271?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Revisiting+the+ridge-push+force+using+the+lithospheric+geoid&rft.au=Richardson%2C+R+M%3BCoblentz%2C+D+D%3BAnonymous&rft.aulast=Richardson&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Joule-Thomson effects on the flow of liquid water AN - 1689589039; 2015-053891 AB - We present a revised form of the energy balance for the coupled thermodynamics of liquid water flowing in porous media and give examples of situations where a commonly used formulation based on transport of enthalpy leads to erroneous results. Assuming negligible contribution from kinetic energy as well as sources and sinks such as energy from radioactive decay, total energy conservation is reduced to a balance between changes in internal energy, enthalpy, conductive heat flux, and gravitational potential energy. The Joule-Thomson coefficient is defined as the change in temperature with respect to an increase in pressure at constant enthalpy. Because liquid water has a negative Joule-Thomson coefficient at low temperatures, at a constant gravitational potential water cools as it compresses and heats as it expands. If one ignores the gravitational energy, transport of enthalpy alone leads to water heating by 2 degrees C per kilometer as it is brought up from depth. The corrected energy balance transports methalpy, which is enthalpy plus gravitational potential energy. Although the simpler form leads to small changes in the temperature profile for typical simulations, there are several instances where this effect may prove to be important. The most important impact of the erroneous form is probably in the field of geothermal energy production, where the creation of a few degrees of heat in a simulation could lead to miscalculation of power plant efficiencies. Copyright 2014 Springer Science+Business Media Dordrecht JF - Transport in Porous Media AU - Stauffer, Philip H AU - Lewis, K C AU - Stein, Joshua S AU - Travis, Bryan J AU - Lichtner, Peter AU - Zyvoloski, George Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 471 EP - 485 PB - Springer, Dordrecht VL - 105 IS - 3 SN - 0169-3913, 0169-3913 KW - water KW - hydrology KW - heat flux KW - carbon sequestration KW - mantle KW - fluid flow KW - porous materials KW - Joule-Thomson effect KW - energy conservation KW - convection KW - energy balance KW - temperature KW - ground water KW - enthalpy KW - transport KW - geysers KW - hydrodynamics KW - heating KW - heat transfer KW - thermodynamic properties KW - ocean floors KW - mass transfer KW - kinetics KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689589039?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transport+in+Porous+Media&rft.atitle=Joule-Thomson+effects+on+the+flow+of+liquid+water&rft.au=Stauffer%2C+Philip+H%3BLewis%2C+K+C%3BStein%2C+Joshua+S%3BTravis%2C+Bryan+J%3BLichtner%2C+Peter%3BZyvoloski%2C+George&rft.aulast=Stauffer&rft.aufirst=Philip&rft.date=2014-12-01&rft.volume=105&rft.issue=3&rft.spage=471&rft.isbn=&rft.btitle=&rft.title=Transport+in+Porous+Media&rft.issn=01693913&rft_id=info:doi/10.1007%2Fs11242-014-0379-3 L2 - http://springerlink.metapress.com/(l4tqdq55jga2hgb0achos1qm)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100342,1 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2015-01-01 N1 - Number of references - 38 N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2015-06-18 N1 - SubjectsTermNotLitGenreText - carbon sequestration; convection; energy balance; energy conservation; enthalpy; fluid flow; geysers; ground water; heat flux; heat transfer; heating; hydrodynamics; hydrology; Joule-Thomson effect; kinetics; mantle; mass transfer; ocean floors; porous materials; temperature; thermodynamic properties; transport; water DO - http://dx.doi.org/10.1007/s11242-014-0379-3 ER - TY - JOUR T1 - Pore-scale study of dissolution-induced changes in hydrologic properties of rocks with binary minerals AN - 1680750405; 2015-044376 AB - A pore-scale numerical model for reactive transport processes based on the Lattice Boltzmann method is used to study the dissolution-induced changes in hydrologic properties of a fractured medium and a porous medium. The solid phase of both media consists of two minerals, and a structure reconstruction method called quartet structure generation set is employed to generate the distributions of both minerals. Emphasis is put on the effects of undissolved minerals on the changes of permeability and porosity under different Peclet and Damkohler numbers. The simulation results show porous layers formed by the undissolved mineral remain behind the dissolution reaction front. Due to the large flow resistance in these porous layers, the permeability increases very slowly or even remains at a small value although the porosity increases by a large amount. Besides, due to the heterogeneous characteristic of the dissolution, the chemical, mechanical and hydraulic apertures are very different from each other. Further, simulations in complex porous structures demonstrate that the existence of the porous layers of the nonreactive mineral suppresses the wormholing phenomena observed in the dissolution of mono-mineralic rocks. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Chen, Li AU - Kang, Qinjun AU - Viswanathan, Hari S AU - Tao, Wenquan Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 9343 EP - 9365 PB - American Geophysical Union, Washington, DC VL - 50 IS - 12 SN - 0043-1397, 0043-1397 KW - solute transport KW - hydrology KW - numerical models KW - porous materials KW - mathematical models KW - equations KW - solution KW - porosity KW - boundary conditions KW - solid phase KW - fractures KW - transport KW - lattice Boltzmann method KW - reactive transport KW - Reynolds number KW - permeability KW - minerals KW - Peclet number KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680750405?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Pore-scale+study+of+dissolution-induced+changes+in+hydrologic+properties+of+rocks+with+binary+minerals&rft.au=Chen%2C+Li%3BKang%2C+Qinjun%3BViswanathan%2C+Hari+S%3BTao%2C+Wenquan&rft.aulast=Chen&rft.aufirst=Li&rft.date=2014-12-01&rft.volume=50&rft.issue=12&rft.spage=9343&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2014WR015646 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 51 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-10-25 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - boundary conditions; equations; fractures; hydrology; lattice Boltzmann method; mathematical models; minerals; numerical models; Peclet number; permeability; porosity; porous materials; reactive transport; Reynolds number; solid phase; solute transport; solution; transport DO - http://dx.doi.org/10.1002/2014WR015646 ER - TY - JOUR T1 - Heterogeneity-enhanced gas phase formation in shallow aquifers during leakage of CO (sub 2) -saturated water from geologic sequestration sites AN - 1680749953; 2015-044371 AB - A primary concern for geologic carbon storage is the potential for leakage of stored carbon dioxide (CO (sub 2) ) into the shallow subsurface where it could degrade the quality of groundwater and surface water. In order to predict and mitigate the potentially negative impacts of CO (sub 2) leakage, it is important to understand the physical processes that CO (sub 2) will undergo as it moves through naturally heterogeneous porous media formations. Previous studies have shown that heterogeneity can enhance the evolution of gas phase CO (sub 2) in some cases, but the conditions under which this occurs have not yet been quantitatively defined, nor tested through laboratory experiments. This study quantitatively investigates the effects of geologic heterogeneity on the process of gas phase CO (sub 2) evolution in shallow aquifers through an extensive set of experiments conducted in a column that was packed with layers of various test sands. Soil moisture sensors were utilized to observe the formation of gas phase near the porous media interfaces. Results indicate that the conditions under which heterogeneity controls gas phase evolution can be successfully predicted through analysis of simple parameters, including the dissolved CO (sub 2) concentration in the flowing water, the distance between the heterogeneity and the leakage location, and some fundamental properties of the porous media. Results also show that interfaces where a less permeable material overlies a more permeable material affect gas phase evolution more significantly than interfaces with the opposite layering. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Plampin, Michael R AU - Lassen, Rune N AU - Sakaki, Toshihiro AU - Porter, Mark L AU - Pawar, Rajesh J AU - Jensen, Karsten H AU - Illangasekare, Tissa H Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 9251 EP - 9266 PB - American Geophysical Union, Washington, DC VL - 50 IS - 12 SN - 0043-1397, 0043-1397 KW - soils KW - carbon sequestration KW - gaseous phase KW - moisture KW - surface water KW - statistical analysis KW - porous materials KW - Bond number KW - carbon dioxide KW - aquifers KW - saturation KW - shallow aquifers KW - leaky aquifers KW - exsolution KW - heterogeneity KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680749953?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Heterogeneity-enhanced+gas+phase+formation+in+shallow+aquifers+during+leakage+of+CO+%28sub+2%29+-saturated+water+from+geologic+sequestration+sites&rft.au=Plampin%2C+Michael+R%3BLassen%2C+Rune+N%3BSakaki%2C+Toshihiro%3BPorter%2C+Mark+L%3BPawar%2C+Rajesh+J%3BJensen%2C+Karsten+H%3BIllangasekare%2C+Tissa+H&rft.aulast=Plampin&rft.aufirst=Michael&rft.date=2014-12-01&rft.volume=50&rft.issue=12&rft.spage=9251&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2014WR015715 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 45 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2016-10-25 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - aquifers; Bond number; carbon dioxide; carbon sequestration; exsolution; gaseous phase; heterogeneity; leaky aquifers; moisture; porous materials; saturation; shallow aquifers; soils; statistical analysis; surface water DO - http://dx.doi.org/10.1002/2014WR015715 ER - TY - JOUR T1 - Spatially resolved projections of carbon releases from thawing polygonal tundra AN - 1676592127; 2015-038029 AB - Arctic wetlands contain significant stores of organic carbon that are potentially vulnerable to release to the atmosphere as Arctic temperatures increase. Projecting the fate of that carbon is particularly difficult for polygonal tundra because of the strong control that organized microtopography plays in the hydrology and carbon cycle in those regions. A comprehensive microtopography-resolving modeling strategy for projecting the release of carbon from warming polygonal tundra has recently been developed. The strategy combines a novel multifaceted simulation capability, workflows for developing high-resolution computational meshes, and approaches for soil parameter estimation. Central to the approach is the Arctic Terrestrial Simulator, a highly parallel simulation tool that couples models of surface and subsurface thermal hydrology with phase change, surface energy balance, snow thermal processes, snow spatial distribution, and soil carbon dynamics all in an extensible and flexibly configured framework. We will present projections of future carbon release from thawing polygonal ground at the Barrow Environmental Observatory. These simulations, which are driven by climate projections in the RCP8.5 scenario, resolve hydrologic processes at the submeter scale to capture variations in soil moisture and soil carbon dynamics across polygon centers, rims, and troughs. We compare results for high- and low-centered polygons, focusing on the integrated effects of microtopography on hydrology and carbon release. This work was supported by LANL Laboratory Directed Research and Development Project LDRD201200068DR and by the The Next-Generation Ecosystem Experiments (NGEE Arctic) project. NGEE-Arctic is supported by the Office of Biological and Environmental Research in the DOE Office of Science. JF - American Geophysical Union Fall Meeting AU - Painter, S L AU - Coon, E AU - Atchley, Adam L AU - Harp, D R AU - Moulton, J D AU - Shelef, E AU - Xu, C AU - Wilson, C J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B43J EP - 08 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676592127?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Spatially+resolved+projections+of+carbon+releases+from+thawing+polygonal+tundra&rft.au=Painter%2C+S+L%3BCoon%2C+E%3BAtchley%2C+Adam+L%3BHarp%2C+D+R%3BMoulton%2C+J+D%3BShelef%2C+E%3BXu%2C+C%3BWilson%2C+C+J%3BAnonymous&rft.aulast=Painter&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Impact of downslope soil transport on carbon storage and fate in permafrost dominated landscapes AN - 1676587656; 2015-037942 AB - A large fraction of high latitude permafrost-dominated landscapes are covered by soil mantled hillslopes. In these landscapes, soil organic carbon (SOC) accumulates and is lost through lateral transport processes. At present, these processes are not included in regional or global landsurface climate models. We present preliminary results of a soil transport and storage model over a permafrost dominated hillslope. In this model soil carbon is transported downslope within a mobile layer that thaws every summer. The model tracks soil transport and its subsequent storage at the hillslope's base. In a scenario where a carbon poor subsurface is blanketed by a carbon-rich surface layer, the progressive downslope soil transport can result in net carbon sequestration. This sequestration occurs because SOC is carried from the hilllsope's near-surface layer, where it is produced by plants and is capable of decomposing, into depositional sites at the hillslope's base where it is stored in frozen deposits such that it's decomposition rate is effectively zero. We use the model to evaluate the quantities of carbon stored in depositional settings during the Holocene, and to predict changes in sequestration rate in response to thaw depth thickening expected to occur within the next century due to climate-change. At the Holocene time scale, we show that a large amount of SOC is likely stored in depositional sites that comprise only a small fraction of arctic landscapes. The convergent topography of these sites makes them susceptible to fluvial erosion and suggests that increased fluvial incision in response to climate-change-induced thawing has the potential to release significant amounts of carbon to the river system, and potentially to the atmosphere. At the time scale of the next century, increased thaw depth may increase soil-transport rates on hillslopes and therefore increase SOC sequestration rates at a magnitude that may partly compensate for the carbon release expected from permafrost thawing. Model guided field data collection is essential to reduce the uncertainty of these estimates. JF - American Geophysical Union Fall Meeting AU - Shelef, E AU - Rowland, J C AU - Wilson, C J AU - Altmann, Garrett AU - Hilley, G E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B31G EP - 0126 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676587656?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Impact+of+downslope+soil+transport+on+carbon+storage+and+fate+in+permafrost+dominated+landscapes&rft.au=Shelef%2C+E%3BRowland%2C+J+C%3BWilson%2C+C+J%3BAltmann%2C+Garrett%3BHilley%2C+G+E%3BAnonymous&rft.aulast=Shelef&rft.aufirst=E&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Pathways and transformations of dissolved methane and dissolved inorganic carbon in Arctic tundra soils; evidence from analysis of stable isotopes AN - 1676587511; 2015-037984 AB - Arctic soils contain a large pool of terrestrial C and are of great interest because of their potential for releasing significant amounts of carbon dioxide (CO2) and methane (CH4) to the atmosphere. Few attempts have been made, however, to derive quantitative budgets of CO2 and CH4 budgets for high-latitude ecosystems. Therefore, this study used naturally occurring geochemical and isotopic tracers to estimate production pathways and transformations of dissolved inorganic carbon (DIC=Sigma (total) dissolved CO2) and dissolved CH4 in soil pore waters from 17 locations (drainages) in Barrow, Alaska (USA) in July and September, 2013; and to approximate a complete balance of belowground C cycling at our sampling locations. Results suggest that CH4 was primarily derived from biogenic acetate fermentation, with a shift at 4 locations from July to September towards CO2 reduction as the dominant methanogenic pathway. A large majority of CH4 produced at the frost table methane was transferred directly to the atmosphere via plant roots and ebullition (94.0+ or -1.4% and 96.6+ or -5.0% in July and September). A considerable fraction of the remaining CH4 was oxidized to CO2 during upward diffusion in July and September, respectively. Methane oxidization produced <1% of CO2 relative to alternative production mechanisms in deep subsurface pore waters. The majority of subsurface CO2 was produced from anaerobic respiration, likely due to reduction of Fe oxides and humics (52+ or -6 to 100+ or -13%, on average) while CO2 produced from methanogenesis accounted for the remainder (0+ or -13% to 47+ or -6%, on average) for July and September, respectively. Dissolved CH4 and dissolved CO2 concentrations correlated with thaw depth, suggesting that Arctic ecosystems will likely produce and release a greater amount of greenhouse gasses under projected warming and deepening of active layer thaw depth under future climate change scenarios. JF - American Geophysical Union Fall Meeting AU - Throckmorton, H AU - Perkins, G AU - Muss, J D AU - Smith, Lydia J AU - Conrad, M E AU - Torn, M S AU - Heikoop, J M AU - Newman, B D AU - Wilson, C J AU - Wullschleger, S D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B43B EP - 0234 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676587511?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Pathways+and+transformations+of+dissolved+methane+and+dissolved+inorganic+carbon+in+Arctic+tundra+soils%3B+evidence+from+analysis+of+stable+isotopes&rft.au=Throckmorton%2C+H%3BPerkins%2C+G%3BMuss%2C+J+D%3BSmith%2C+Lydia+J%3BConrad%2C+M+E%3BTorn%2C+M+S%3BHeikoop%2C+J+M%3BNewman%2C+B+D%3BWilson%2C+C+J%3BWullschleger%2C+S+D%3BAnonymous&rft.aulast=Throckmorton&rft.aufirst=H&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Age of dissolved organic carbon across an Arctic landscape AN - 1676587350; 2015-037963 AB - The Arctic is particularly vulnerable to climate change. Systems there currently experience a balance between frozen and thawed conditions and the proportion of frozen and thawed conditions are expected to change with increasing temperatures and changes in snowfall. Increased temperatures will make these frozen stocks of carbon, much of it labile, vulnerable to decomposition and translocation. Most studies on the carbon balance of terrestrial ecosystems have focused on gaseous fluxes of carbon to the atmosphere, but numerous studies have shown that production and loss of dissolved carbon can be a crucial mechanism for high-latitude ecosystem carbon loss that results in considerable export off the Arctic landscape and may reduce or eliminate terrestrial carbon sinks. In addition, hydrological vertical transport of DOC is an important process in permafrost areas. In collaboration with the NGEE-Arctic study, we measured 14C of DOC from surface waters and from shallow and deep subsurface porewater collected from various locations in the Barrow Arctic Ocean Observatory (BAO) including different drainage locations and thawed lake basins of varying age. Locations were sampled in July and September 2013 to assess changes in 14C-DOC across the landscape and from early and late summer. Preliminary results suggest that DOC in surface and pore water increases in age with depth and across the growing season. These patterns as well as patterns across the landscape will be presented and discussed. JF - American Geophysical Union Fall Meeting AU - McFarlane, K J AU - Throckmorton, H AU - Guilderson, T P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B41O EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676587350?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Age+of+dissolved+organic+carbon+across+an+Arctic+landscape&rft.au=McFarlane%2C+K+J%3BThrockmorton%2C+H%3BGuilderson%2C+T+P%3BAnonymous&rft.aulast=McFarlane&rft.aufirst=K&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Constraints on abundance, composition, and nature of X-ray amorphous components of soils and rocks at Gale Crater, Mars AN - 1660629880; 2015-021795 AB - X-ray diffraction patterns of the three samples analyzed by Curiosity's Chemistry and Mineralogy (CheMin) instrument during the first year of the Mars Science Laboratory mission-the Rocknest sand, and the John Klein and Cumberland drill fines, both extracted from the Sheepbed mudstone-show evidence for a significant amorphous component of unclear origin. We developed a mass balance calculation program that determines the range of possible chemical compositions of the crystalline and amorphous components of these samples within the uncertainties of mineral abundances derived from CheMin data. In turn, the chemistry constrains the minimum abundance of amorphous component required to have realistic compositions (all oxides > or = 0 wt %): 21-22 wt % for Rocknest and 15-20 wt % for Cumberland, in good agreement with estimates derived from the diffraction patterns ( approximately 27 and approximately 31 wt %, respectively). Despite obvious differences between the Rocknest sand and the Sheepbed mudstone, the amorphous components of the two sites are chemically very similar, having comparable concentrations of SiO (sub 2) , TiO (sub 2) , Al (sub 2) O (sub 3) , Cr (sub 2) O (sub 3) , FeO (sub T) , CaO, Na (sub 2) O, K (sub 2) O, and P (sub 2) O (sub 5) . MgO tends to be lower in Rocknest, although it may also be comparable between the two samples depending on the exact composition of the smectite in Sheepbed. The only unambiguous difference is the SO (sub 3) content, which is always higher in Rocknest. The observed similarity suggests that the two amorphous components share a common origin or formation process. The individual phases possibly present within the amorphous components include: volcanic (or impact) glass, hisingerite (or silica + ferrihydrite), amorphous sulfates (or adsorbed SO (sub 4) (super 2-) ), and nanophase ferric oxides. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Dehouck, Erwin AU - McLennan, Scott M AU - Meslin, Pierre-Yves AU - Cousin, Agnes Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2640 EP - 2657 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 12 SN - 2169-9097, 2169-9097 KW - silicates KW - iron oxides KW - impact features KW - X-ray diffraction data KW - Mars KW - landing sites KW - Gale Crater KW - sedimentary rocks KW - silica KW - Curiosity Rover KW - oxides KW - glass materials KW - soils KW - hisingerite KW - sulfate ion KW - mudstone KW - sulfates KW - amorphous materials KW - ferrihydrite KW - clay minerals KW - terrestrial planets KW - planets KW - Mars Science Laboratory KW - sheet silicates KW - impact craters KW - nanoparticles KW - clastic rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660629880?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Constraints+on+abundance%2C+composition%2C+and+nature+of+X-ray+amorphous+components+of+soils+and+rocks+at+Gale+Crater%2C+Mars&rft.au=Dehouck%2C+Erwin%3BMcLennan%2C+Scott+M%3BMeslin%2C+Pierre-Yves%3BCousin%2C+Agnes&rft.aulast=Dehouck&rft.aufirst=Erwin&rft.date=2014-12-01&rft.volume=119&rft.issue=12&rft.spage=2640&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004716 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 48 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-03-05 N1 - SubjectsTermNotLitGenreText - amorphous materials; clastic rocks; clay minerals; Curiosity Rover; ferrihydrite; Gale Crater; glass materials; hisingerite; impact craters; impact features; iron oxides; landing sites; Mars; Mars Science Laboratory; mudstone; nanoparticles; oxides; planets; sedimentary rocks; sheet silicates; silica; silicates; soils; sulfate ion; sulfates; terrestrial planets; X-ray diffraction data DO - http://dx.doi.org/10.1002/2014JE004716 ER - TY - JOUR T1 - The influence of grain shape and volume fraction of sheet silicates on elastic properties of aggregates; biotite platelets in an isotropic matrix AN - 1645573445; 2015-007539 AB - Elastic anisotropy of sheet-silicate-rich rocks such as shales and slates strongly depends on the orientation distribution of platelet-shaped minerals, as well as shape and orientation of pores. Bulk elastic anisotropy of the rock results in the anisotropy with respect to the propagation of elastic waves, and consequently, the fastest P-waves can travel with velocities exceeding the slowest velocities by a factor of two or even greater. An important factor is the sheet-silicate's grain shapes. We approached a model system of biotite platelets in an isotropic matrix with different methods: A mean-field self-consistent method that considered ellipsoidal particles in an effective anisotropic matrix, and a full-field method based on fast Fourier transforms that considered the microstructure, the topology of the polycrystal, and local interactions. Both methods provided numerically very close results. Using these results, we predicted that the aggregate with more oblate grain shape (thinner platelets) was elastically more anisotropic than the material with grains of less oblate shape, but only for small volume fractions of oriented platelets. For large fractions of platelets, the opposite was true. This switchover in the elastic anisotropy depended on texture strength, platelet shape, and elastic properties of the isotropic matrix. JF - Geophysics AU - Vasin, Roman AU - Lebensohn, Ricardo A AU - Matthies, Siegfried AU - Tome, Carlos N AU - Wenk, Hans-Rudolf Y1 - 2014/12// PY - 2014 DA - December 2014 SP - D433 EP - D441 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 79 IS - 6 SN - 0016-8033, 0016-8033 KW - silicates KW - P-waves KW - crystal form KW - lattice KW - elastic properties KW - elastic waves KW - sedimentary rocks KW - mica group KW - metamorphic rocks KW - velocity KW - propagation KW - orientation KW - body waves KW - isotropic materials KW - shale KW - matrix KW - geophysical methods KW - seismic methods KW - slates KW - biotite KW - volume KW - polycrystalline materials KW - sheet silicates KW - seismic waves KW - clastic rocks KW - anisotropy KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645573445?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysics&rft.atitle=The+influence+of+grain+shape+and+volume+fraction+of+sheet+silicates+on+elastic+properties+of+aggregates%3B+biotite+platelets+in+an+isotropic+matrix&rft.au=Vasin%2C+Roman%3BLebensohn%2C+Ricardo+A%3BMatthies%2C+Siegfried%3BTome%2C+Carlos+N%3BWenk%2C+Hans-Rudolf&rft.aulast=Vasin&rft.aufirst=Roman&rft.date=2014-12-01&rft.volume=79&rft.issue=6&rft.spage=D433&rft.isbn=&rft.btitle=&rft.title=Geophysics&rft.issn=00168033&rft_id=info:doi/10.1190%2Fgeo2014-0148.1 L2 - http://library.seg.org/journal/gpysa7 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 27 N1 - PubXState - OK N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-01-15 N1 - CODEN - GPYSA7 N1 - SubjectsTermNotLitGenreText - anisotropy; biotite; body waves; clastic rocks; crystal form; elastic properties; elastic waves; geophysical methods; isotropic materials; lattice; matrix; metamorphic rocks; mica group; orientation; P-waves; polycrystalline materials; propagation; sedimentary rocks; seismic methods; seismic waves; shale; sheet silicates; silicates; slates; velocity; volume DO - http://dx.doi.org/10.1190/geo2014-0148.1 ER - TY - JOUR T1 - A higher-order unsplit 2D direct Eulerian finite volume method for two-material compressible flows based on the MOOD paradigms AN - 1635017114; 21007794 AB - A higher-order unsplit multi-dimensional discretization of the diffuse interface model for two-material compressible flows proposed by R. Saurel, F. Petitpas and R. A. Berry in 2009 is developed. The proposed higher-order method is based on the concepts of the Multidimensional Optimal Order Detection (MOOD) method introduced in three recent papers for single-material flows. The first-order unsplit multi-dimensional Finite Volume discretization presented by SPB serves as foundation for the development of the higher-order unlimited schemes. Specific detection criteria along with a novel decrementing algorithm for the MOOD method are designed in order to deal with the complexity of multi-material flows. Numerically, we compare errors and computational times on several 1D problems (stringent shock tube and cavitation problems) computed on 2D meshes with the second- and fourth-order MOOD methods using a classical MUSCL method as reference. Several simulations of a 2D shocked R22 bubble in the air are also presented on Cartesian and unstructured meshes with the second- and fourth-order MOOD methods, and qualitative comparisons confirm the conclusions obtained with 1D problems. These numerical results demonstrate the robustness of the MOOD approach and the interest of using more than second-order methods even for locally singular solutions of complex physics models. Copyright copyright 2014 John Wiley & Sons, Ltd. A 2D unsplit fourth-order Finite Volume scheme for a two-material compressible flow reduced model is developed using the concepts of the MOOD method. Numerical comparisons against a second-order MUSCL method are provided to demonstrate the better efficiency of the proposed method on problems containing discontinuities. JF - International Journal for Numerical Methods in Fluids AU - Diot, S AU - Francois, M M AU - Dendy, ED AD - Fluid Dynamics and Solid Mechanics (T-3), Los Alamos National Laboratory, NM, 87545, Los Alamos, USA. Y1 - 2014/12// PY - 2014 DA - Dec 2014 SP - 1064 EP - 1087 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 76 IS - 12 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Mathematical models KW - Interfaces KW - Algorithms KW - Tubes KW - Errors KW - Compressible Flow KW - Model Studies KW - Methodology KW - Cavitation KW - Fluid dynamics KW - Bubbles KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - Q2 09169:Fluid mechanics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1635017114?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=A+higher-order+unsplit+2D+direct+Eulerian+finite+volume+method+for+two-material+compressible+flows+based+on+the+MOOD+paradigms&rft.au=Diot%2C+S%3BFrancois%2C+M+M%3BDendy%2C+ED&rft.aulast=Diot&rft.aufirst=S&rft.date=2014-12-01&rft.volume=76&rft.issue=12&rft.spage=1064&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.3966 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mathematical models; Cavitation; Fluid dynamics; Methodology; Interfaces; Algorithms; Errors; Tubes; Bubbles; Compressible Flow; Model Studies DO - http://dx.doi.org/10.1002/fld.3966 ER - TY - JOUR T1 - Optimizing human activity patterns using global sensitivity analysis AN - 1634462903; 4623579 AB - Implementing realistic activity patterns for a population is crucial for modeling, for example, disease spread, supply and demand, and disaster response. Using the dynamic activity simulation engine, DASim, we generate schedules for a population that capture regular (e.g., working, eating, and sleeping) and irregular activities (e.g., shopping or going to the doctor). We use the sample entropy (SampEn) statistic to quantify a schedule's regularity for a population. We show how to tune an activity's regularity by adjusting SampEn, thereby making it possible to realistically design activities when creating a schedule. The tuning process sets up a computationally intractable high-dimensional optimization problem. To reduce the computational demand, we use Bayesian Gaussian process regression to compute global sensitivity indices and identify the parameters that have the greatest effect on the variance of SampEn. We use the harmony search (HS) global optimization algorithm to locate global optima. Our results show that HS combined with global sensitivity analysis can efficiently tune the SampEn statistic with few search iterations. We demonstrate how global sensitivity analysis can guide statistical emulation and global optimization algorithms to efficiently tune activities and generate realistic activity patterns. Though our tuning methods are applied to dynamic activity schedule generation, they are general and represent a significant step in the direction of automated tuning and optimization of high-dimensional computer simulations. Reprinted by permission of Springer JF - Computational and mathematical organization theory AU - Fairchild, Geoffrey AU - Hickmann, Kyle S AU - Mniszewski, Susan M AU - Valle, Sara Y. Del_ AU - Hyman, James M AD - Los Alamos National Laboratory ; Tulane University Y1 - 2014/12// PY - 2014 DA - Dec 2014 SP - 394 EP - 416 VL - 20 IS - 4 SN - 1381-298X, 1381-298X KW - Economics KW - Variance analysis KW - Computers KW - Statistical analysis KW - Computational methods KW - Simulation KW - Bayesian method UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1634462903?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aibss&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computational+and+mathematical+organization+theory&rft.atitle=Optimizing+human+activity+patterns+using+global+sensitivity+analysis&rft.au=Fairchild%2C+Geoffrey%3BHickmann%2C+Kyle+S%3BMniszewski%2C+Susan+M%3BValle%2C+Sara+Y.+Del_%3BHyman%2C+James+M&rft.aulast=Fairchild&rft.aufirst=Geoffrey&rft.date=2014-12-01&rft.volume=20&rft.issue=4&rft.spage=394&rft.isbn=&rft.btitle=&rft.title=Computational+and+mathematical+organization+theory&rft.issn=1381298X&rft_id=info:doi/10.1007%2Fs10588-013-9171-0 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2014-12-09 N1 - Last updated - 2014-12-09 N1 - SubjectsTermNotLitGenreText - 2671 10919; 2683; 11670; 1512 3865 4025; 13250 12224 971; 12224 971 DO - http://dx.doi.org/10.1007/s10588-013-9171-0 ER - TY - JOUR T1 - The development of global probabilistic propagation look-up tables for infrasound celerity and back-azimuth deviation AN - 1629939263; 2014-099627 JF - Seismological Research Letters AU - Morton, Emily A AU - Arrowsmith, Stephen J Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 1223 EP - 1233 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 6 SN - 0895-0695, 0895-0695 KW - back-azimuth deviation KW - acceleration KW - seismic sources KW - attenuation KW - International Monitoring System KW - Gaussian mixture model KW - propagation KW - probability KW - focus KW - nuclear explosions KW - monitoring KW - explosions KW - global KW - statistical analysis KW - signals KW - detection KW - mathematical methods KW - ray tracing KW - infrasound KW - earthquakes KW - accuracy KW - winds KW - acoustical waves KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629939263?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=The+development+of+global+probabilistic+propagation+look-up+tables+for+infrasound+celerity+and+back-azimuth+deviation&rft.au=Morton%2C+Emily+A%3BArrowsmith%2C+Stephen+J&rft.aulast=Morton&rft.aufirst=Emily&rft.date=2014-12-01&rft.volume=85&rft.issue=6&rft.spage=1223&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220140124 L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 23 N1 - PubXState - CA N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - acceleration; accuracy; acoustical waves; attenuation; back-azimuth deviation; Comprehensive Test Ban Treaty; detection; earthquakes; explosions; focus; Gaussian mixture model; global; infrasound; International Monitoring System; mathematical methods; monitoring; nuclear explosions; probability; propagation; ray tracing; seismic sources; signals; statistical analysis; winds DO - http://dx.doi.org/10.1785/0220140124 ER - TY - JOUR T1 - Molecular epidemiology of infant botulism in California and elsewhere, 1976-2010. AN - 1622064941; 24924163 AB - BACKGROUNDInfant botulism (IB), first identified in California in 1976, results from Clostridium botulinum spores that germinate, multiply, and produce botulinum neurotoxin (BoNT) in the immature intestine. From 1976 to 2010 we created an archive of 1090 BoNT-producing isolates consisting of 1012 IB patient (10 outpatient, 985 hospitalized, 17 sudden death), 25 food, 18 dust/soils, and 35 other strains.METHODSThe mouse neutralization assay determined isolate toxin type (56% BoNT/A, 32% BoNT/B). Amplified fragment-length polymorphism (AFLP) analysis of the isolates was combined with epidemiologic information.RESULTSThe AFLP dendrogram, the largest to date, contained 154 clades; 52% of isolates clustered in just 2 clades, 1 BoNT/A (n=418) and 1 BoNT/B (n=145). These clades constituted an endemic C. botulinum population that produced the entire clinical spectrum of IB. Isolates from the patient's home environment (dust/soil, honey) usually located to the same AFLP clade as the patient's isolate, thereby identifying the likely source of infective spores. C. botulinum A(B) strains were identified in California for the first time.CONCLUSIONSCombining molecular methods and epidemiological data created an effective tool that yielded novel insights into the genetic diversity of C. botulinum and the clinical spectrum, occurrence, and distribution of IB in California. JF - The Journal of infectious diseases AU - Dabritz, Haydee A AU - Hill, Karen K AU - Barash, Jason R AU - Ticknor, Lawrence O AU - Helma, Charles H AU - Dover, Nir AU - Payne, Jessica R AU - Arnon, Stephen S AD - Infant Botulism Treatment and Prevention Program, Division of Communicable Disease Control, Center for Infectious Diseases, California Department of Public Health, Richmond. ; Bioscience Division. ; Computing, Computational and Statistical Sciences Division, Los Alamos National Laboratory, New Mexico. Y1 - 2014/12/01/ PY - 2014 DA - 2014 Dec 01 SP - 1711 EP - 1722 VL - 210 IS - 11 KW - Botulinum Toxins KW - EC 3.4.24.69 KW - Abridged Index Medicus KW - Index Medicus KW - botulinum toxin KW - Clostridium butyricum KW - infant botulism KW - Clostridium baratii KW - sudden infant death KW - clinical spectrum KW - molecular epidemiology KW - Clostridium botulinum KW - honey KW - Phylogeny KW - Infant KW - Genotype KW - Phylogeography KW - History, 21st Century KW - History, 20th Century KW - Public Health Surveillance KW - Humans KW - Botulinum Toxins -- genetics KW - Incidence KW - Amplified Fragment Length Polymorphism Analysis KW - Geography KW - California -- epidemiology KW - Clostridium botulinum -- classification KW - Botulism -- history KW - Clostridium botulinum -- isolation & purification KW - Botulism -- epidemiology KW - Clostridium botulinum -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622064941?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Journal+of+infectious+diseases&rft.atitle=Molecular+epidemiology+of+infant+botulism+in+California+and+elsewhere%2C+1976-2010.&rft.au=Dabritz%2C+Haydee+A%3BHill%2C+Karen+K%3BBarash%2C+Jason+R%3BTicknor%2C+Lawrence+O%3BHelma%2C+Charles+H%3BDover%2C+Nir%3BPayne%2C+Jessica+R%3BArnon%2C+Stephen+S&rft.aulast=Dabritz&rft.aufirst=Haydee&rft.date=2014-12-01&rft.volume=210&rft.issue=11&rft.spage=1711&rft.isbn=&rft.btitle=&rft.title=The+Journal+of+infectious+diseases&rft.issn=1537-6613&rft_id=info:doi/10.1093%2Finfdis%2Fjiu331 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-01-09 N1 - Date created - 2014-11-08 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1093/infdis/jiu331 ER - TY - CPAPER T1 - The physiology of direct climate stress on tree mortality: where do insects fit in? T2 - 62nd Annual Meeting of the Entomological Society of America (Entomology 2014) AN - 1645170842; 6324008 JF - 62nd Annual Meeting of the Entomological Society of America (Entomology 2014) AU - Adams, Henry AU - Sevanto, Sanna AU - Dickman, Lee AU - Gaylord, Monica AU - Plaut, Jennifer AU - McDowell, Nathan AU - Pockman, William AU - Breshears, David AU - Huxman, Travis Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Mortality KW - Trees KW - Climate KW - Physiology KW - Stress KW - Pest control KW - Aquatic insects KW - Insects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645170842?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=62nd+Annual+Meeting+of+the+Entomological+Society+of+America+%28Entomology+2014%29&rft.atitle=The+physiology+of+direct+climate+stress+on+tree+mortality%3A+where+do+insects+fit+in%3F&rft.au=Adams%2C+Henry%3BSevanto%2C+Sanna%3BDickman%2C+Lee%3BGaylord%2C+Monica%3BPlaut%2C+Jennifer%3BMcDowell%2C+Nathan%3BPockman%2C+William%3BBreshears%2C+David%3BHuxman%2C+Travis&rft.aulast=Adams&rft.aufirst=Henry&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=62nd+Annual+Meeting+of+the+Entomological+Society+of+America+%28Entomology+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://esa.confex.com/esa/2014/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Engineering More Effective Catalysts for Unnatural Allomorphs of Cellulose T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627968068; 6310547 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Gnanakaran, Gnana AU - Chundawat, Shishir AU - Lopez, Cesar AU - Sousa, Leonardo AU - Dale, Bruce AU - Fox, Brian Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Cellulose KW - Catalysts UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627968068?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.atitle=Engineering+More+Effective+Catalysts+for+Unnatural+Allomorphs+of+Cellulose&rft.au=Gnanakaran%2C+Gnana%3BChundawat%2C+Shishir%3BLopez%2C+Cesar%3BSousa%2C+Leonardo%3BDale%2C+Bruce%3BFox%2C+Brian&rft.aulast=Gnanakaran&rft.aufirst=Gnana&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2014/webprogram/meeting2014-11-16.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-31 N1 - Last updated - 2014-11-26 ER - TY - CPAPER T1 - Solid State NMR Evidence for Antiparallel beta-Sheet Structure within Toxic Oligomers of the Alzheimer's beta-Amyloid Peptide T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627965459; 6311400 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Paravastu, Anant Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Neurodegenerative diseases KW - Alzheimer's disease KW - Peptides KW - N.M.R. KW - b-Amyloid UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627965459?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.atitle=Solid+State+NMR+Evidence+for+Antiparallel+beta-Sheet+Structure+within+Toxic+Oligomers+of+the+Alzheimer%27s+beta-Amyloid+Peptide&rft.au=Paravastu%2C+Anant&rft.aulast=Paravastu&rft.aufirst=Anant&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2014/webprogram/meeting2014-11-16.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-31 N1 - Last updated - 2014-11-26 ER - TY - CPAPER T1 - Recent Advances in Accelerated Molecular Dynamics Methods T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627963789; 6310144 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Voter, Arthur Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Chemical engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627963789?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.atitle=Recent+Advances+in+Accelerated+Molecular+Dynamics+Methods&rft.au=Voter%2C+Arthur&rft.aulast=Voter&rft.aufirst=Arthur&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2014/webprogram/meeting2014-11-16.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-31 N1 - Last updated - 2014-11-26 ER - TY - CPAPER T1 - Numerical Computation of Permeability in Unstable Colloidal Gels T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627962392; 6310739 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Graham, Alan AU - Mertz, Alex AU - Ingber, Marc AU - Redondo, Antonio AU - Gelb, Lev Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Gels KW - Permeability UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627962392?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.atitle=Numerical+Computation+of+Permeability+in+Unstable+Colloidal+Gels&rft.au=Graham%2C+Alan%3BMertz%2C+Alex%3BIngber%2C+Marc%3BRedondo%2C+Antonio%3BGelb%2C+Lev&rft.aulast=Graham&rft.aufirst=Alan&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2014/webprogram/meeting2014-11-16.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-31 N1 - Last updated - 2014-11-26 ER - TY - CPAPER T1 - Separation Mechanism of Carbon Nanotubes Via Aqueous Two-Phase Method: Towards Simple Isolation T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627962069; 6309565 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Duque, Juan AU - Subbaiyan, Navaneetha AU - Cambre, Sofie AU - Haroz, Erik AU - Doorn, Stephen AU - Parra-Vasquez, Nicholas Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Carbon KW - nanotubes KW - Nanotechnology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627962069?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.atitle=Separation+Mechanism+of+Carbon+Nanotubes+Via+Aqueous+Two-Phase+Method%3A+Towards+Simple+Isolation&rft.au=Duque%2C+Juan%3BSubbaiyan%2C+Navaneetha%3BCambre%2C+Sofie%3BHaroz%2C+Erik%3BDoorn%2C+Stephen%3BParra-Vasquez%2C+Nicholas&rft.aulast=Duque&rft.aufirst=Juan&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2014/webprogram/meeting2014-11-16.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-31 N1 - Last updated - 2014-11-26 ER - TY - CPAPER T1 - Bonding Energy of Sylgard on Fused Quartz: An Experimental Investigation T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645171433; 6314940 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Liu, Cheng AU - Yeager, John AU - Ramos, Kyle Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Quartz KW - Energy KW - Adhesion UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645171433?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=Bonding+Energy+of+Sylgard+on+Fused+Quartz%3A+An+Experimental+Investigation&rft.au=Liu%2C+Cheng%3BYeager%2C+John%3BRamos%2C+Kyle&rft.aulast=Liu&rft.aufirst=Cheng&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - JOUR T1 - Effects of dust feedback on vortices in protoplanetary disks AN - 1849300652; 2016-104863 AB - We carried out two-dimensional, high-resolution simulations to study the effect of dust feedback on the evolution of vortices induced by massive planets in protoplanetary disks. Various initial dust to gas disk surface density ratios (0.001-0.01) and dust particle sizes (Stokes number 4 X 10 (super -4) -0.16) are considered. We found that while dust particles migrate inward, vortices are very effective at collecting them. When dust density becomes comparable to gas density within the vortex, a dynamical instability is excited and it alters the coherent vorticity pattern and destroys the vortex. This dust feedback effect is stronger with a higher initial dust/gas density ratio and larger dust grain. Consequently, we found that the disk vortex lifetime can be reduced up to a factor of 10. We discuss the implications of our findings on the survivability of vortices in protoplanetary disks and planet formation. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal. Letters AU - Fu, Wen AU - Li, Hui AU - Lubow, Stephen AU - Li, Shengtai AU - Liang, Edison Y1 - 2014/11/10/ PY - 2014 DA - 2014 Nov 10 EP - Paper no. L39 PB - IOP Publishing, Bristol VL - 795 IS - 2 SN - 2041-8205, 2041-8205 KW - accretion KW - numerical models KW - density KW - grain size KW - vorticity KW - simulation KW - protoplanetary disk KW - interplanetary dust KW - two-dimensional models KW - gases KW - feedback KW - planets KW - cosmic dust KW - hydrodynamics KW - particles KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849300652?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Astrophysical+Journal.+Letters&rft.atitle=Effects+of+dust+feedback+on+vortices+in+protoplanetary+disks&rft.au=Fu%2C+Wen%3BLi%2C+Hui%3BLubow%2C+Stephen%3BLi%2C+Shengtai%3BLiang%2C+Edison&rft.aulast=Fu&rft.aufirst=Wen&rft.date=2014-11-10&rft.volume=795&rft.issue=2&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal.+Letters&rft.issn=20418205&rft_id=info:doi/10.1088%2F2041-8205%2F795%2F2%2FL39 L2 - http://iopscience.iop.org/2041-8205 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 38 N1 - Document feature - illus. N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - accretion; cosmic dust; density; feedback; gases; grain size; hydrodynamics; interplanetary dust; numerical models; particles; planets; protoplanetary disk; simulation; two-dimensional models; vorticity DO - http://dx.doi.org/10.1088/2041-8205/795/2/L39 ER - TY - JOUR T1 - Role of preparation method on the extent of montmorillonite catalysis for oligomer formation AN - 1832674011; 713640-13 AB - The extent of catalytic activity of montmorillonites (Mts) for RNA-like oligomer synthesis varies considerably depending on the method used to prepare the Mt. Homoionic Mt prepared by titration method produced longer oligomers with higher yields compared with Mt prepared by saturation method. The difference in catalytic activity between these two types of Mts is related to the difference in nature of their edge sites. Abstract Copyright (2014) Elsevier, B.V. JF - Applied Clay Science AU - Ertem, Goezen AU - Gan, Zhehong Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 90 EP - 93 PB - Elsevier, Amsterdam VL - 101 SN - 0169-1317, 0169-1317 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832674011?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Clay+Science&rft.atitle=Role+of+preparation+method+on+the+extent+of+montmorillonite+catalysis+for+oligomer+formation&rft.au=Ertem%2C+Goezen%3BGan%2C+Zhehong&rft.aulast=Ertem&rft.aufirst=Goezen&rft.date=2014-11-01&rft.volume=101&rft.issue=&rft.spage=90&rft.isbn=&rft.btitle=&rft.title=Applied+Clay+Science&rft.issn=01691317&rft_id=info:doi/10.1016%2Fj.clay.2014.07.022 L2 - http://www.sciencedirect.com/science/journal/01691317 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1016/j.clay.2014.07.022 ER - TY - JOUR T1 - Pore-scale simulation of liquid CO (sub 2) displacement of water using a two-phase lattice Boltzmann model AN - 1784737996; 2016-035406 AB - A lattice Boltzmann color-fluid model, which was recently proposed by Liu et al. (2012) based on a concept of continuum surface force, is improved to simulate immiscible two-phase flows in porous media. The new improvements allow the model to account for different kinematic viscosities of both fluids and to model fluid-solid interactions. The capability and accuracy of this model is first validated by two benchmark tests: a layered two-phase flow with a variable viscosity ratio, and a dynamic capillary intrusion. This model is then used to simulate liquid CO (sub 2) (LCO (sub 2) ) displacing water in a dual-permeability pore network. The extent and behavior of LCO (sub 2) preferential flow (i.e., fingering) is found to depend on the capillary number (Ca), and three different displacement patterns observed in previous micromodel experiments are reproduced. The predicted variation of LCO (sub 2) saturation with Ca, as well as variation of specific interfacial length with LCO (sub 2) saturation, are both in reasonable agreement with the experimental observations. To understand the effect of heterogeneity on pore-scale displacement, we also simulate LCO (sub 2) displacing water in a randomly heterogeneous pore network, which has the same size and porosity as the simulated dual-permeability pore network. In comparison to the dual-permeability case, the transition from capillary fingering to viscous fingering occurs at a higher Ca, and LCO (sub 2) saturation is higher at low Ca but lower at high Ca. In either pore network, the LCO (sub 2) -water specific interfacial length is found to obey a power-law dependence on LCO (sub 2) saturation. Abstract Copyright (2014) Elsevier, B.V. JF - Advances in Water Resources AU - Liu, Haihu AU - Valocchi, Albert J AU - Werth, Charles AU - Kang, Qinjun AU - Oostrom, Mart Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 144 EP - 158 PB - Elsevier, Oxford VL - 73 SN - 0309-1708, 0309-1708 KW - two-phase models KW - fluid flow KW - porous materials KW - capillarity KW - preferential flow KW - solution KW - simulation KW - porosity KW - carbon dioxide KW - chemical reactions KW - viscosity KW - saturation KW - immiscibility KW - multiphase flow KW - lattice Boltzmann method KW - heterogeneity KW - permeability KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1784737996?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Pore-scale+simulation+of+liquid+CO+%28sub+2%29+displacement+of+water+using+a+two-phase+lattice+Boltzmann+model&rft.au=Liu%2C+Haihu%3BValocchi%2C+Albert+J%3BWerth%2C+Charles%3BKang%2C+Qinjun%3BOostrom%2C+Mart&rft.aulast=Liu&rft.aufirst=Haihu&rft.date=2014-11-01&rft.volume=73&rft.issue=&rft.spage=144&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2014.07.010 L2 - http://www.sciencedirect.com/science/journal/03091708 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 104 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-04-28 N1 - SubjectsTermNotLitGenreText - capillarity; carbon dioxide; chemical reactions; fluid flow; heterogeneity; immiscibility; lattice Boltzmann method; multiphase flow; permeability; porosity; porous materials; preferential flow; saturation; simulation; solution; two-phase models; viscosity DO - http://dx.doi.org/10.1016/j.advwatres.2014.07.010 ER - TY - JOUR T1 - VERIFICATION AND VALIDATION OF THE ENDF/B-VII.1-BASED CONTINUOUS-ENERGY DATA TABLES FOR MCNP6 AN - 1773849254; PQ0002500222 AB - In December 2011, the National Nuclear Data Center released ENDF/B-VII.1, the "latest recommended evaluated nuclear data file for use in nuclear science and technology applications." The data were released in the standard Evaluated Nuclear Data Format (ENDF). This release represents the advances made in nuclear data during the 5 years since the release of ENDF/B-VII.0. The Nuclear Data Team at Los Alamos National Laboratory has processed the ENDF/B-VII.1 library and made available a library of ACE data tables at several temperatures for each of the ENDF/B files. The ACE data library is called ENDF71x and is available through the Radiation Safety Information Computational Center with MCNP6. The files can also be used with MCNP5 or other Monte Carlo codes. JF - Nuclear Technology AU - Conlin, Jeremy Lloyd AU - Parsons, D Kent AU - Gardiner, Steven J AU - Gray, Mark AU - Kahler, A C AU - Lee, M Beth AU - White, Morgan C AD - Los Alamos National Laboratory, P.O. Box 1663, MS F663, Los Alamos, New Mexico 87545, jlconlin@lanl.gov Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 218 EP - 227 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 188 IS - 2 SN - 0029-5450, 0029-5450 KW - Health & Safety Science Abstracts KW - Monte Carlo KW - ENDF/B-VII.1 KW - nuclear data KW - Monte Carlo simulation KW - Temperature KW - USA, New Mexico, Los Alamos KW - Technology KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773849254?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Technology&rft.atitle=VERIFICATION+AND+VALIDATION+OF+THE+ENDF%2FB-VII.1-BASED+CONTINUOUS-ENERGY+DATA+TABLES+FOR+MCNP6&rft.au=Conlin%2C+Jeremy+Lloyd%3BParsons%2C+D+Kent%3BGardiner%2C+Steven+J%3BGray%2C+Mark%3BKahler%2C+A+C%3BLee%2C+M+Beth%3BWhite%2C+Morgan+C&rft.aulast=Conlin&rft.aufirst=Jeremy&rft.date=2014-11-01&rft.volume=188&rft.issue=2&rft.spage=218&rft.isbn=&rft.btitle=&rft.title=Nuclear+Technology&rft.issn=00295450&rft_id=info:doi/10.13182%2FNT13-153 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Number of references - 12 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Monte Carlo simulation; Temperature; Technology; USA, New Mexico, Los Alamos DO - http://dx.doi.org/10.13182/NT13-153 ER - TY - JOUR T1 - A vibro-haptic human-machine interface for Structural Health Monitoring AN - 1701482676; PQ0001554137 AB - The goal of the Structural Health Monitoring community has been to endow physical systems with a nervous system not unlike those commonly found in living organisms. Typically, the Structural Health Monitoring community has attempted to do this by instrumenting structures with a variety of sensors and then applying various signal processing and classification procedures to the data in order to detect the presence of damage, the location of damage, the severity of damage, and to estimate the remaining useful life of the structure. This procedure has had some success, but we are still a long way from achieving the performance of nervous systems found in biology. This is primarily because contemporary classification algorithms do not have the performance required. In many cases, expert judgment is superior to automated classification. This work introduces a new paradigm. We propose interfacing the human nervous system to the distributed sensor network located on the structure and developing new techniques to enable human-machine cooperation. The results from the field of sensory substitution suggest this should be possible. This study investigates a vibro-haptic human-machine interface for Structural Health Monitoring. The investigation was performed using a surrogate three-story structure. The structure features three nonlinearity-inducing bumpers to simulate damage. Accelerometers are placed on each floor to measure the response of the structure to a harmonic base excitation. The accelerometer measurements are preprocessed. The preprocessed data are then encoded as a vibro-tactile stimulus. Human subjects were then subjected to the vibro-tactile stimulus and asked to characterize the damage in the structure. JF - Structural Health Monitoring AU - Mascarenas, David AU - Plont, Crystal AU - Brown, Christina AU - Cowell, Martin AU - Jameson, N Jordan AU - Block, Jessica AU - Djidjev, Stephanie AU - Hahn, Heidi AU - Farrar, Charles AD - The Engineering Institute, Los Alamos National Laboratory, Los Alamos, NM, USA Y1 - 2014/11// PY - 2014 DA - Nov 2014 SP - 671 EP - 685 PB - Sage Publications Ltd., 6 Bonhill St. London EC2A 4PU United Kingdom VL - 13 IS - 6 SN - 1475-9217, 1475-9217 KW - Health & Safety Science Abstracts KW - Haptic KW - sensory substitution KW - human echolocation KW - actuator KW - human-machine interface KW - vibro-tactile KW - vibro-haptic KW - Classification KW - Sensors KW - Accelerometers KW - H 6000:Natural Disasters/Civil Defense/Emergency Management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701482676?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Structural+Health+Monitoring&rft.atitle=A+vibro-haptic+human-machine+interface+for+Structural+Health+Monitoring&rft.au=Mascarenas%2C+David%3BPlont%2C+Crystal%3BBrown%2C+Christina%3BCowell%2C+Martin%3BJameson%2C+N+Jordan%3BBlock%2C+Jessica%3BDjidjev%2C+Stephanie%3BHahn%2C+Heidi%3BFarrar%2C+Charles&rft.aulast=Mascarenas&rft.aufirst=David&rft.date=2014-11-01&rft.volume=13&rft.issue=6&rft.spage=671&rft.isbn=&rft.btitle=&rft.title=Structural+Health+Monitoring&rft.issn=14759217&rft_id=info:doi/10.1177%2F1475921714556569 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Number of references - 42 N1 - Last updated - 2015-08-05 N1 - SubjectsTermNotLitGenreText - Sensors; Classification; Accelerometers DO - http://dx.doi.org/10.1177/1475921714556569 ER - TY - JOUR T1 - Joint inversion of body-wave arrival times and surface-wave dispersion for three-dimensional seismic structure around SAFOD AN - 1696875579; 2015-069172 AB - We incorporate body-wave arrival time and surface-wave dispersion data into a joint inversion for three-dimensional P-wave and S-wave velocity structure of the crust surrounding the site of the San Andreas Fault Observatory at Depth. The contributions of the two data types to the inversion are controlled by the relative weighting of the respective equations. We find that the trade-off between fitting the two data types, controlled by the weighting, defines a clear optimal solution. Varying the weighting away from the optimal point leads to sharp increases in misfit for one data type with only modest reduction in misfit for the other data type. All the acceptable solutions yield structures with similar primary features, but the smaller-scale features change substantially. When there is a lower relative weight on the surface-wave data, it appears that the solution over-fits the body-wave data, leading to a relatively rough V (sub s) model, whereas for the optimal weighting, we obtain a relatively smooth model that is able to fit both the body-wave and surface-wave observations adequately. Copyright 2014 Springer Basel JF - Pure and Applied Geophysics AU - Zhang, Haijiang AU - Maceira, Monica AU - Roux, Philippe AU - Thurber, Clifford Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 3013 EP - 3022 PB - Birkhaeuser, Basel VL - 171 IS - 11 SN - 0033-4553, 0033-4553 KW - United States KW - P-waves KW - body waves KW - three-dimensional models KW - guided waves KW - SAFOD KW - data processing KW - San Andreas Fault Observatory at Depth KW - inverse problem KW - elastic waves KW - California KW - surface waves KW - seismicity KW - San Andreas Fault KW - velocity structure KW - Monterey County California KW - Parkfield California KW - seismic waves KW - algorithms KW - wave dispersion KW - arrival time KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875579?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Pure+and+Applied+Geophysics&rft.atitle=Joint+inversion+of+body-wave+arrival+times+and+surface-wave+dispersion+for+three-dimensional+seismic+structure+around+SAFOD&rft.au=Zhang%2C+Haijiang%3BMaceira%2C+Monica%3BRoux%2C+Philippe%3BThurber%2C+Clifford&rft.aulast=Zhang&rft.aufirst=Haijiang&rft.date=2014-11-01&rft.volume=171&rft.issue=11&rft.spage=3013&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-014-0806-y L2 - http://link.springer.de/link/service/journals/00024/index.htm LA - English DB - GeoRef N1 - Conference title - 40th workshop of the International School of Geophysics; Properties and processes of crustal fault zones N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2015-01-01 N1 - Number of references - 52 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-07-17 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - algorithms; arrival time; body waves; California; data processing; elastic waves; guided waves; inverse problem; Monterey County California; P-waves; Parkfield California; S-waves; SAFOD; San Andreas Fault; San Andreas Fault Observatory at Depth; seismic waves; seismicity; surface waves; three-dimensional models; United States; velocity structure; wave dispersion DO - http://dx.doi.org/10.1007/s00024-014-0806-y ER - TY - JOUR T1 - Chemistry of fracture-filling raised ridges in Yellowknife Bay, Gale Crater; window into past aqueous activity and habitability on Mars AN - 1660629931; 2015-021784 AB - The ChemCam instrument package on the Curiosity rover was used to characterize distinctive raised ridges in the Sheepbed mudstone, Yellowknife Bay formation, Gale Crater. The multilayered, fracture-filling ridges are more resistant to erosion than the Sheepbed mudstone rock in which they occur. The bulk average composition of the raised ridges is enriched in MgO by 1.2-1.7 times (average of 8.3-11.4 wt %; single-shot maximum of 17.0 wt %) over that of the mudstone. Al (sub 2) O (sub 3) is anticorrelated with MgO, while Li is somewhat enriched where MgO is highest. Some ridges show a variation in composition with different layers on a submillimeter scale. In particular, the McGrath target shows similar high-MgO resistant outer layers and a low-MgO, less resistant inner layer. This is consistent with the interpretation that the raised ridges are isopachous fracture-filling cements with a stratigraphy that likely reveals changes in fluid composition or depositional conditions over time. Overall, the average composition of the raised ridges is close to that of a Mg- and Fe-rich smectite, or saponite, which may also be the main clay mineral constituent of the host mudstone. These analyses provide evidence of diagenesis and aqueous activity in the early postdepositional history of the Yellowknife Bay formation, consistent with a low salinity to brackish fluid at near-neutral or slightly alkaline pH. The fluids that circulated through the fractures likely interacted with the Sheepbed mudstone and (or) other stratigraphically adjacent rock units of basaltic composition and leached Mg from them preferentially. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Leveille, Richard J AU - Bridges, John AU - Wiens, Roger C AU - Mangold, Nicolas AU - Cousin, Agnes AU - Lanza, Nina AU - Forni, Olivier AU - Ollila, Ann AU - Grotzinger, John AU - Clegg, Samuel AU - Siebach, Kirsten AU - Berger, Gilles AU - Clark, Ben AU - Fabre, Cecile AU - Anderson, Ryan AU - Gasnault, Olivier AU - Blaney, Diana AU - Deflores, Lauren AU - Leshin, Laurie AU - Maurice, Sylvestre AU - Newsom, Horton Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2398 EP - 2415 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 11 SN - 2169-9097, 2169-9097 KW - silicates KW - saponite KW - Yellowknife Bay Formation KW - smectite KW - Mars KW - Sheepbed Mudstone KW - Gale Crater KW - clay minerals KW - terrestrial planets KW - planets KW - fractures KW - ridges KW - habitability KW - Curiosity Rover KW - surface features KW - sheet silicates KW - chemical composition KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660629931?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Chemistry+of+fracture-filling+raised+ridges+in+Yellowknife+Bay%2C+Gale+Crater%3B+window+into+past+aqueous+activity+and+habitability+on+Mars&rft.au=Leveille%2C+Richard+J%3BBridges%2C+John%3BWiens%2C+Roger+C%3BMangold%2C+Nicolas%3BCousin%2C+Agnes%3BLanza%2C+Nina%3BForni%2C+Olivier%3BOllila%2C+Ann%3BGrotzinger%2C+John%3BClegg%2C+Samuel%3BSiebach%2C+Kirsten%3BBerger%2C+Gilles%3BClark%2C+Ben%3BFabre%2C+Cecile%3BAnderson%2C+Ryan%3BGasnault%2C+Olivier%3BBlaney%2C+Diana%3BDeflores%2C+Lauren%3BLeshin%2C+Laurie%3BMaurice%2C+Sylvestre%3BNewsom%2C+Horton&rft.aulast=Leveille&rft.aufirst=Richard&rft.date=2014-11-01&rft.volume=119&rft.issue=11&rft.spage=2398&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004620 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 72 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-03-05 N1 - SubjectsTermNotLitGenreText - chemical composition; clay minerals; Curiosity Rover; fractures; Gale Crater; habitability; Mars; planets; ridges; saponite; Sheepbed Mudstone; sheet silicates; silicates; smectite; surface features; terrestrial planets; Yellowknife Bay Formation DO - http://dx.doi.org/10.1002/2014JE004620 ER - TY - JOUR T1 - Assessing the strength of the monsoon during the late Pleistocene in Southwestern United States AN - 1656036885; 2015-013456 AB - Improved predictions of drought require an understanding of natural and human-induced climate variability. Long-term records across glacial-interglacial cycles provide the natural component of variability, however few such records exist for the southwestern United States (US) and quantitative or semi-quantitative records of precipitation are absent. Here we use the hydrogen isotope (delta D) value of C (sub 28) n-alkanoic acid in lacustrine sediments of Pleistocene age to reconstruct delta D values of precipitation in northern New Mexico over two glacial-interglacial cycles ( approximately 550,000-360,000 years before present) and obtain a record of monsoon strength. Overall, reconstructed delta D values range from -53.8 ppm to -94.4 ppm, with a mean value of -77.5 + or - 8 ppm. Remarkably, this variation falls within the measured present-day summer monsoonal and winter weighted means (-50.3 + or - 3 ppm and -106.4 + or - 20 ppm respectively), suggesting that processes similar to those of present time also controlled precipitation during Marine Isotope Stage (MIS) 13 to 10. Using the delta D summer monsoonal and winter mean values as end-members, we interpret our reconstructed delta D record of precipitation as a direct, and semi-quantitative, indicator of monsoon strength during MIS 13 to 10. Interglacial periods were characterized by greater monsoon strength but also greater variability compared to glacial periods. Pronounced cycles in the strength of the monsoon occurred during interglacial periods and in general were positively correlated with maximum mean annual temperatures. Our estimates of monsoon strength are supported by independent proxies of ecosystem productivity, namely, TOC, delta (super 13) C of TOC and Si/Ti ratio and warm pollen taxa Juniperus and Quercus. Interglacial variability in the strength of the monsoon resembles a response to the land-sea surface temperature contrast (LSTC) except for the early part of MIS 11. During this period, LSTC would have remained relatively strong while monsoonal strength decreased to a minimum. This minimum occurred following the warmest interval of MIS 11, suggesting a more complex driving of monsoon strength during warm periods. In addition, this period of monsoon minimum coincided with a core section of mud-cracked sediments that suggest low monsoonal precipitation was an important factor in the onset of drought. Our estimates of monsoon strength represent a record of natural variability in the region that is relevant to present time, in particular the variability during interglacial MIS 11, which is considered an analog for the current interglacial. Our results suggest that natural variability can cause significant reductions in monsoonal precipitation with the implication of a potentially adverse effect from sustained warming. Abstract Copyright (2014) Elsevier, B.V. JF - Quaternary Science Reviews AU - Cisneros-Dozal, Luz M AU - Huang, Yongsong AU - Heikoop, Jeffrey M AU - Fawcett, Peter J AU - Fessenden, Julianna AU - Anderson, R Scott AU - Meyers, Philip A AU - Larson, Toti AU - Perkins, George AU - Toney, Jaime AU - Werne, Josef P AU - Goff, Fraser AU - WoldeGabriel, Giday AU - Allen, Craig D AU - Berke, Melissa A Y1 - 2014/11/01/ PY - 2014 DA - 2014 Nov 01 SP - 81 EP - 90 PB - Elsevier VL - 103 SN - 0277-3791, 0277-3791 KW - United States KW - lithostratigraphy KW - isotopes KW - Sandoval County New Mexico KW - atmospheric precipitation KW - New Mexico KW - leaves KW - paleoclimatology KW - stable isotopes KW - cores KW - drought KW - upper Pleistocene KW - Cenozoic KW - monsoons KW - waxes KW - Valles Caldera KW - sediments KW - chemostratigraphy KW - Jemez Mountains KW - depositional environment KW - Quaternary KW - paleohydrology KW - isotope ratios KW - Southwestern U.S. KW - organic compounds KW - D/H KW - hydrogen KW - lacustrine environment KW - Pleistocene KW - reconstruction KW - north-central New Mexico KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036885?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Quaternary+Science+Reviews&rft.atitle=Assessing+the+strength+of+the+monsoon+during+the+late+Pleistocene+in+Southwestern+United+States&rft.au=Cisneros-Dozal%2C+Luz+M%3BHuang%2C+Yongsong%3BHeikoop%2C+Jeffrey+M%3BFawcett%2C+Peter+J%3BFessenden%2C+Julianna%3BAnderson%2C+R+Scott%3BMeyers%2C+Philip+A%3BLarson%2C+Toti%3BPerkins%2C+George%3BToney%2C+Jaime%3BWerne%2C+Josef+P%3BGoff%2C+Fraser%3BWoldeGabriel%2C+Giday%3BAllen%2C+Craig+D%3BBerke%2C+Melissa+A&rft.aulast=Cisneros-Dozal&rft.aufirst=Luz&rft.date=2014-11-01&rft.volume=103&rft.issue=&rft.spage=81&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2Fj.quascirev.2014.08.022 L2 - http://www.sciencedirect.com/science/journal/02773791 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 46 N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - atmospheric precipitation; Cenozoic; chemostratigraphy; cores; D/H; depositional environment; drought; hydrogen; isotope ratios; isotopes; Jemez Mountains; lacustrine environment; leaves; lithostratigraphy; monsoons; New Mexico; north-central New Mexico; organic compounds; paleoclimatology; paleohydrology; Pleistocene; Quaternary; reconstruction; Sandoval County New Mexico; sediments; Southwestern U.S.; stable isotopes; United States; upper Pleistocene; Valles Caldera; waxes DO - http://dx.doi.org/10.1016/j.quascirev.2014.08.022 ER - TY - JOUR T1 - Reducing the computer memory requirement for 3D reverse-time migration with a boundary-wavefield extrapolation method AN - 1645574540; 2015-007530 AB - Reverse-time migration (RTM) using the crosscorrelation imaging condition requires that the forward-propagated source wavefield and the backward-propagated receiver wavefield be accessible within the imaging domain at the same time step. There are two categories of methods to balance the computer memory requirement and the computational complexity of RTM: checkpointing methods and source-wavefield reconstruction methods. We have developed a new source-wavefield reconstruction method to improve the balance between the computer memory requirement and the computational complexity of RTM. During the forward simulation of the source wavefield, we stored boundary wavefields only at one or two layers of spatial grid points and reconstructed the back-propagated source wavefield at the same time step as that of the back-propagated receiver wavefield, using a high-order wave-equation extrapolation scheme. One conventional RTM method uses boundary wavefields stored at multiple layers of spatial grid points and a high-order finite-difference (FD) scheme to reconstruct the back-propagated source wavefield. For an FD scheme with the eighth or sixteenth order of accuracy in space, our new method used only 37.5% of the computer memory required by this conventional method to store the boundary wavefields. This reduction of computer memory usage is significant because storing the boundary wavefields consumes most of the computer memory required for 3D migration using reconstructed source wavefields. Moreover, our method maintained the spatial order of accuracy of the FD scheme for the entire imaging domain, whereas some conventional methods reduce the spatial-order accuracy of the FD scheme near the boundaries to back-propagate the source wavefield to decrease the computer memory requirement. We validated our method using synthetic seismic data. Our method produced 2D and 3D migration images of complex subsurface structures as accurate as those yielded using an RTM method without reducing the spatial order of accuracy near the boundaries. JF - Geophysics AU - Tan, Sirui AU - Huang, Lianjie Y1 - 2014/11// PY - 2014 DA - November 2014 SP - S185 EP - S194 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 79 IS - 5 SN - 0016-8033, 0016-8033 KW - extrapolation KW - three-dimensional models KW - finite difference analysis KW - data acquisition KW - geophysical methods KW - data processing KW - optimization KW - equations KW - wave fields KW - seismic migration KW - seismic methods KW - computers KW - theoretical studies KW - mathematical methods KW - reverse time migration KW - velocity KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645574540?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysics&rft.atitle=Reducing+the+computer+memory+requirement+for+3D+reverse-time+migration+with+a+boundary-wavefield+extrapolation+method&rft.au=Tan%2C+Sirui%3BHuang%2C+Lianjie&rft.aulast=Tan&rft.aufirst=Sirui&rft.date=2014-11-01&rft.volume=79&rft.issue=5&rft.spage=S185&rft.isbn=&rft.btitle=&rft.title=Geophysics&rft.issn=00168033&rft_id=info:doi/10.1190%2Fgeo2014-0075.1 L2 - http://library.seg.org/journal/gpysa7 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 31 N1 - PubXState - OK N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-01-15 N1 - CODEN - GPYSA7 N1 - SubjectsTermNotLitGenreText - computers; data acquisition; data processing; equations; extrapolation; finite difference analysis; geophysical methods; mathematical methods; optimization; reverse time migration; seismic methods; seismic migration; theoretical studies; three-dimensional models; velocity; wave fields DO - http://dx.doi.org/10.1190/geo2014-0075.1 ER - TY - JOUR T1 - Impact of Variable-Resolution Meshes on Midlatitude Baroclinic Eddies Using CAM-MPAS-A AN - 1622601478; 20890737 AB - The effects of a variable-resolution mesh on simulated midlatitude baroclinic eddies in idealized settings are examined. Both aquaplanet and Held-Suarez experiments are performed using the Model for Prediction Across Scales-Atmosphere (MPAS-A) hydrostatic dynamical core implemented within the National Science Foundation-Department of Energy (NSF-DOE) Community Atmosphere Model (CAM-MPAS-A). In the real world, midlatitude eddy activity is organized by orography, land-sea contrasts, and sea surface temperature anomalies. In these zonally symmetric idealized settings, transients should have an equal probability of occurring at any longitude. However, the use of a variable-resolution mesh with a circular high-resolution region centered at 30 degree N results in a maximum in eddy kinetic energy on the eastern side and downstream of this high-resolution region in both aquaplanet and Held-Suarez CAM-MPAS-A simulations. The presence of a geographically confined maximum in both simulations suggests this response is mainly attributable to CAM-MPAS-A's ability to resolve eddies via the model dynamics as resolution increases. However, in the aquaplanet simulation, a secondary maximum in eddy kinetic energy is present, which is probably linked to the resolution dependencies of the CAM physics. These mesh responses must be considered when interpreting real-world variable-resolution CAM-MPAS-A simulations, particularly in climate change experiments. JF - Monthly Weather Review AU - Rauscher, Sara A AU - Ringler, Todd D AD - Fluid Dynamics and Solid Mechanics Group, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 4256 EP - 4268 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 142 IS - 11 SN - 0027-0644, 0027-0644 KW - Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts KW - Eddies KW - Multigrid models KW - Prediction KW - Weather KW - Climate models KW - Climate change KW - Temperature KW - Simulation KW - Oceanic eddies KW - Orography KW - Atmosphere KW - Sea surface temperature anomalies KW - Numerical simulations KW - Eddy kinetic energy KW - Energy KW - Kinetics KW - Reviews KW - Temperature anomalies KW - Hydrostatics KW - Downstream KW - Longitude KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development KW - Q2 09244:Air-sea coupling KW - O 2070:Meteorology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622601478?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Monthly+Weather+Review&rft.atitle=Impact+of+Variable-Resolution+Meshes+on+Midlatitude+Baroclinic+Eddies+Using+CAM-MPAS-A&rft.au=Rauscher%2C+Sara+A%3BRingler%2C+Todd+D&rft.aulast=Rauscher&rft.aufirst=Sara&rft.date=2014-11-01&rft.volume=142&rft.issue=11&rft.spage=4256&rft.isbn=&rft.btitle=&rft.title=Monthly+Weather+Review&rft.issn=00270644&rft_id=info:doi/10.1175%2FMWR-D-13-00366.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Number of references - 50 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Eddy kinetic energy; Climate change; Temperature anomalies; Hydrostatics; Oceanic eddies; Sea surface temperature anomalies; Climate models; Numerical simulations; Orography; Prediction; Weather; Reviews; Kinetics; Energy; Temperature; Simulation; Longitude; Downstream; Atmosphere DO - http://dx.doi.org/10.1175/MWR-D-13-00366.1 ER - TY - JOUR T1 - Speciation of iodine isotopes inside and outside of a contaminant plume at the Savannah River Site. AN - 1566408941; 25173764 AB - A primary obstacle in understanding the fate and transport of the toxic radionuclide (129)I (a thyroid seeker) is an accurate method to distinguish it from the stable isotope, (127)I, and to quantify the various species at environmentally relevant concentrations (~10(-8) M). A pH-dependent solvent extraction and combustion method was paired with accelerator mass spectrometry (AMS) to measure ambient levels of (129)I/(127)I isotope ratios and iodine speciation (iodide (I(-)), iodate (IO3(-)), and organo-I (OI)) in aquatic systems. The method exhibited an overall uncertainty of 10% or less for I(-) and IO3(-), and less than 30% for OI species concentrations and enabled (129)I measurements as low as 0.001 Bq/L (1 Bq/L=10(-13) M). The method was used to analyze groundwater from the Savannah River Site (SRS), South Carolina, USA, along a pH, redox potential (Eh), and organic carbon gradient (8-60 μM DOC). The data confirmed that the (129)I/(127)I ratios and species distribution were strongly pH dependent and varied in a systematic manner from the strongly acidic source. While (129)I speciation in plume samples containing total I concentrations >1.7 Bq/L was similar whether measured by AMS or GC-MS ([I(-)]≫[IO3(-)]=[OI]), AMS enabled (129)I speciation measurements at much lower concentrations than what was possible with GC-MS. AMS analyses demonstrated that groundwater samples minimally impacted by the plume were still orders of magnitude higher than ambient (129)I concentrations typically found elsewhere in the USA groundwaters and rivers. This is likely due to past atmospheric releases of volatile (129)I species by SRS nuclear reprocessing facilities near the study site. Furthermore, the results confirmed the existence of (129)I not only as I(-), but also as OI and IO3(-) species. JF - The Science of the total environment AU - Schwehr, Kathleen A AU - Otosaka, Shigeyoshi AU - Merchel, Silke AU - Kaplan, Daniel I AU - Zhang, Saijin AU - Xu, Chen AU - Li, Hsiu-Ping AU - Ho, Yi-Fang AU - Yeager, Chris M AU - Santschi, Peter H AU - ASTER Team AD - Laboratory for Oceanographic and Environmental Research, Department of Marine Sciences, Texas A&M University, OCSB 3029, 200 Seawolf Parkway, Galveston, TX 77553, United States. ; Laboratory for Oceanographic and Environmental Research, Department of Marine Sciences, Texas A&M University, OCSB 3029, 200 Seawolf Parkway, Galveston, TX 77553, United States; Research Group for Environmental Science, Japan Atomic Energy Agency, Tokai Mura, Ibaraki 319 1195, Japan. ; Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany. ; Savannah River National Laboratory, Aiken, SC 29808, United States. ; Los Alamos National Laboratory, Los Alamos, NM 87545, United States. ; ASTER Team Y1 - 2014/11/01/ PY - 2014 DA - 2014 Nov 01 SP - 671 EP - 678 VL - 497-498 KW - Iodine Isotopes KW - 0 KW - Water Pollutants, Chemical KW - Index Medicus KW - Iodide KW - Organo-iodine KW - Iodate KW - Radioiodine ((129)I) KW - Accelerator mass spectrometer (AMS) Iodine speciation KW - South Carolina KW - Water Movements KW - Rivers -- chemistry KW - Environmental Monitoring KW - Iodine Isotopes -- analysis KW - Water Pollutants, Chemical -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566408941?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Science+of+the+total+environment&rft.atitle=Speciation+of+iodine+isotopes+inside+and+outside+of+a+contaminant+plume+at+the+Savannah+River+Site.&rft.au=Schwehr%2C+Kathleen+A%3BOtosaka%2C+Shigeyoshi%3BMerchel%2C+Silke%3BKaplan%2C+Daniel+I%3BZhang%2C+Saijin%3BXu%2C+Chen%3BLi%2C+Hsiu-Ping%3BHo%2C+Yi-Fang%3BYeager%2C+Chris+M%3BSantschi%2C+Peter+H%3BASTER+Team&rft.aulast=Schwehr&rft.aufirst=Kathleen&rft.date=2014-11-01&rft.volume=497-498&rft.issue=&rft.spage=671&rft.isbn=&rft.btitle=&rft.title=The+Science+of+the+total+environment&rft.issn=1879-1026&rft_id=info:doi/10.1016%2Fj.scitotenv.2014.07.006 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-06-23 N1 - Date created - 2014-09-26 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.scitotenv.2014.07.006 ER - TY - CPAPER T1 - A 3D Geologic Framework Model of the Source Physics Experiment (Spe) Phase I Test Bed T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645168735; 6316512 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Snelson, Catherine AU - Bradley, Christopher AU - Coblentz, David AU - Patton, Howard AU - Sussman, Aviva AU - Whitaker, Rodney Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Geology KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645168735?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+Geological+Society+of+America+%28GSA+2014%29&rft.atitle=A+3D+Geologic+Framework+Model+of+the+Source+Physics+Experiment+%28Spe%29+Phase+I+Test+Bed&rft.au=Snelson%2C+Catherine%3BBradley%2C+Christopher%3BCoblentz%2C+David%3BPatton%2C+Howard%3BSussman%2C+Aviva%3BWhitaker%2C+Rodney&rft.aulast=Snelson&rft.aufirst=Catherine&rft.date=2014-10-19&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+Geological+Society+of+America+%28GSA+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2014AM/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - JOUR T1 - Radioiodine Biogeochemistry and Prevalence in Groundwater. AN - 1826605550; 25264421 AB - 129I is commonly either the top or among the top risk drivers, along with 99Tc, at radiological waste disposal sites and contaminated groundwater sites where nuclear material fabrication or reprocessing has occurred. The risk stems largely from 129I having a high toxicity, a high bioaccumulation factor (90% of all the body's iodine concentrates in the thyroid), a high inventory at source terms (due to its high fission yield), an extremely long half-life (16M years), and rapid mobility in the subsurface environment. Another important reason that 129I is a key risk driver is that there is uncertainty regarding its biogeochemical fate and transport in the environment. We typically can define 129I mass balance and flux at sites, but cannot predict accurately its response to changes in the environment. As a consequence of some of these characteristics, 129I has a very low drinking water standard, which is set at 1 pCi/L, the lowest of all radionuclides in the Federal Register. Recently, significant advancements have been made in detecting iodine species at ambient groundwater concentrations, defining the nature of the organic matter and iodine bond, and quantifying the role of naturally occurring sediment microbes to promote iodine oxidation and reduction. These recent studies have led to a more mechanistic understanding of radioiodine biogeochemistry. The objective of this review is to describe these advances and to provide a state of the science of radioiodine biogeochemistry relevant to its fate and transport in the terrestrial environment and provide information useful for making decisions regarding the stewardship and remediation of 129I contaminated sites. As part of this review, knowledge gaps were identified that would significantly advance the goals of basic and applied research programs for accelerating 129I environmental remediation and reducing uncertainty associated with disposal of 129I waste. Together the information gained from addressing these knowledge gaps will not alter the observation that 129I is primarily mobile, but it will likely permit demonstration that the entire 129I pool in the source term is not moving at the same rate and some may be tightly bound to the sediment, thereby smearing the modeled 129I peak and reducing maximum calculated risk. JF - Critical reviews in environmental science and technology AU - Kaplan, D I AU - Denham, M E AU - Zhang, S AU - Yeager, C AU - Xu, C AU - Schwehr, K A AU - Li, H P AU - Ho, Y F AU - Wellman, D AU - Santschi, P H AD - Savannah River National Laboratory , Aiken , SC , USA. ; Department of Marine Sciences, Texas A&M University , Galveston , TX , USA. ; Los Alamos National Laboratory , Los Alamos , NM , USA. ; Pacific Northwest National Laboratory , Richland , WA , USA. Y1 - 2014/10/18/ PY - 2014 DA - 2014 Oct 18 SP - 2287 EP - 2335 VL - 44 IS - 20 SN - 1064-3389, 1064-3389 KW - fission product KW - iodate KW - iodination KW - iodide KW - Iodine-131 KW - Iodine-129 KW - covalent bonding KW - risk assessment KW - organic matter KW - remediation KW - microbiology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1826605550?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Critical+reviews+in+environmental+science+and+technology&rft.atitle=Radioiodine+Biogeochemistry+and+Prevalence+in+Groundwater.&rft.au=Kaplan%2C+D+I%3BDenham%2C+M+E%3BZhang%2C+S%3BYeager%2C+C%3BXu%2C+C%3BSchwehr%2C+K+A%3BLi%2C+H+P%3BHo%2C+Y+F%3BWellman%2C+D%3BSantschi%2C+P+H&rft.aulast=Kaplan&rft.aufirst=D&rft.date=2014-10-18&rft.volume=44&rft.issue=20&rft.spage=2287&rft.isbn=&rft.btitle=&rft.title=Critical+reviews+in+environmental+science+and+technology&rft.issn=10643389&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2014-09-29 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 ER - TY - CPAPER T1 - Neutron vibrational spectroscopy in energy research T2 - 66th Southeastern Regional Meeting of the American Chemical Society (SERMACS 2014) AN - 1645169279; 6324942 JF - 66th Southeastern Regional Meeting of the American Chemical Society (SERMACS 2014) AU - Daemen, Luke AU - Lujan Jr, Manuel Y1 - 2014/10/16/ PY - 2014 DA - 2014 Oct 16 KW - Neutrons KW - Energy KW - Energy research KW - Spectroscopy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645169279?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=66th+Southeastern+Regional+Meeting+of+the+American+Chemical+Society+%28SERMACS+2014%29&rft.atitle=Neutron+vibrational+spectroscopy+in+energy+research&rft.au=Daemen%2C+Luke%3BLujan+Jr%2C+Manuel&rft.aulast=Daemen&rft.aufirst=Luke&rft.date=2014-10-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=66th+Southeastern+Regional+Meeting+of+the+American+Chemical+Society+%28SERMACS+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://abstracts.acs.org/chem/sermacs2014/program/divisionindex.php?act=session&val=289700&prog=289700 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Quantum chemistry made simple T2 - 66th Southeastern Regional Meeting of the American Chemical Society (SERMACS 2014) AN - 1645166591; 6324834 JF - 66th Southeastern Regional Meeting of the American Chemical Society (SERMACS 2014) AU - Challacombe, Matt Y1 - 2014/10/16/ PY - 2014 DA - 2014 Oct 16 KW - Quantum chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645166591?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=66th+Southeastern+Regional+Meeting+of+the+American+Chemical+Society+%28SERMACS+2014%29&rft.atitle=Quantum+chemistry+made+simple&rft.au=Challacombe%2C+Matt&rft.aulast=Challacombe&rft.aufirst=Matt&rft.date=2014-10-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=66th+Southeastern+Regional+Meeting+of+the+American+Chemical+Society+%28SERMACS+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://abstracts.acs.org/chem/sermacs2014/program/divisionindex.php?act=session&val=289700&prog=289700 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - JOUR T1 - Direct observations of evolving subglacial drainage beneath the Greenland ice sheet AN - 1648906137; 2015-009608 JF - Nature (London) AU - Andrews, Lauren C AU - Catania, Ginny A AU - Hoffman, Matthew J AU - Gulley, Jason D AU - Luthi, Martin P AU - Ryser, Claudia AU - Hawley, Robert L AU - Neumann, Thomas A Y1 - 2014/10/02/ PY - 2014 DA - 2014 Oct 02 SP - 80 EP - 83 PB - Macmillan Journals, London VL - 514 IS - 7520 SN - 0028-0836, 0028-0836 KW - hydrology KW - subglacial environment KW - pressure KW - Arctic region KW - drainage KW - Paakitsoq KW - Greenland ice sheet KW - glaciers KW - ice sheets KW - Greenland KW - melting KW - hydraulic head KW - boreholes KW - dynamics KW - velocity KW - seasonal variations KW - glacial geology KW - meltwater KW - 24:Quaternary geology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648906137?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+%28London%29&rft.atitle=Direct+observations+of+evolving+subglacial+drainage+beneath+the+Greenland+ice+sheet&rft.au=Andrews%2C+Lauren+C%3BCatania%2C+Ginny+A%3BHoffman%2C+Matthew+J%3BGulley%2C+Jason+D%3BLuthi%2C+Martin+P%3BRyser%2C+Claudia%3BHawley%2C+Robert+L%3BNeumann%2C+Thomas+A&rft.aulast=Andrews&rft.aufirst=Lauren&rft.date=2014-10-02&rft.volume=514&rft.issue=7520&rft.spage=80&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature13796 L2 - http://www.nature.com/nature/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 47 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2015-04-16 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - Arctic region; boreholes; drainage; dynamics; glacial geology; glaciers; Greenland; Greenland ice sheet; hydraulic head; hydrology; ice sheets; melting; meltwater; Paakitsoq; pressure; seasonal variations; subglacial environment; velocity DO - http://dx.doi.org/10.1038/nature13796 ER - TY - JOUR T1 - Surface complexation modeling of americium sorption onto volcanic tuff AN - 1680756198; 2015-043420 AB - Results of a surface complexation model (SCM) for americium sorption on volcanic rocks (devitrified and zeolitic tuff) are presented. The model was developed using PHREEQC and based on laboratory data for americium sorption on quartz. Available data for sorption of americium on quartz as a function of pH in dilute groundwater can be modeled with two surface reactions involving an americium sulfate and an americium carbonate complex. It was assumed in applying the model to volcanic rocks from Yucca Mountain, that the surface properties of volcanic rocks can be represented by a quartz surface. Using groundwaters compositionally representative of Yucca Mountain, americium sorption distribution coefficient (K (sub d) , L/Kg) values were calculated as function of pH. These K (sub d) values are close to the experimentally determined K (sub d) values for americium sorption on volcanic rocks, decreasing with increasing pH in the pH range from 7 to 9. The surface complexation constants, derived in this study, allow prediction of sorption of americium in a natural complex system, taking into account the inherent uncertainty associated with geochemical conditions that occur along transport pathways. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Ding, M AU - Kelkar, S AU - Meijer, A Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 181 EP - 187 PB - Elsevier, Oxford VL - 136 SN - 0265-931X, 0265-931X KW - United States KW - solute transport KW - hazardous waste KW - sorption KW - volcanic rocks KW - isotopes KW - igneous rocks KW - complexing KW - radioactive waste KW - ground water KW - radioactive isotopes KW - devitrification KW - transport KW - surface complexation model KW - tuff KW - Yucca Mountain KW - water pollution KW - pH KW - Nevada KW - PHREEQC KW - sulfates KW - pollutants KW - pollution KW - Nye County Nevada KW - models KW - pyroclastics KW - metals KW - mathematical methods KW - americium KW - mobilization KW - waste disposal KW - crystal chemistry KW - carbonates KW - actinides KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680756198?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Environmental+Radioactivity&rft.atitle=Surface+complexation+modeling+of+americium+sorption+onto+volcanic+tuff&rft.au=Ding%2C+M%3BKelkar%2C+S%3BMeijer%2C+A&rft.aulast=Ding&rft.aufirst=M&rft.date=2014-10-01&rft.volume=136&rft.issue=&rft.spage=181&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2014.06.007 L2 - http://www.sciencedirect.com/science/journal/0265931X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 43 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - actinides; americium; carbonates; complexing; crystal chemistry; devitrification; ground water; hazardous waste; igneous rocks; isotopes; mathematical methods; metals; mobilization; models; Nevada; Nye County Nevada; pH; PHREEQC; pollutants; pollution; pyroclastics; radioactive isotopes; radioactive waste; solute transport; sorption; sulfates; surface complexation model; transport; tuff; United States; volcanic rocks; waste disposal; water pollution; Yucca Mountain DO - http://dx.doi.org/10.1016/j.jenvrad.2014.06.007 ER - TY - JOUR T1 - Caterpillar-like ice motion in the ablation zone of the Greenland ice sheet AN - 1656036742; 2015-013699 AB - Current understanding of ice dynamics predicts that increasing availability and variability of meltwater will have an impact on basal motion and therefore on the evolution and future behavior of the Greenland ice sheet. We present measurements of ice deformation, subglacial water pressure, and surface velocity that show periodic and episodic variations on several time scales (seasonal, multiday, and diurnal). These variations, observed with GPS and sensors at different depths throughout the ice column, are not synchronous but show delayed responses of ice deformation with increasing depth and basal water pressure in antiphase with surface velocity. With the help of a Full-Stokes ice flow model, these observations are explained as ice motion in a caterpillar-like fashion. Caused by patches of different basal slipperiness, horizontal stress transfer through the stiff central part of the ice body leads to spatially varying surface velocities and ice deformation patterns. Variation of this basal slipperiness induces characteristic patterns of ice deformation variability that explain the observed behavior. Ice flow in the ablation zone of the Greenland ice sheet is therefore controlled by activation of basal patches by varying slipperiness in the course of a melt season, leading to caterpillar-like ice motion superposed on the classical shear deformation. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Earth Surface AU - Ryser, C AU - Luethi, M P AU - Andrews, L C AU - Catania, G A AU - Funk, M AU - Hawley, R AU - Hoffman, M AU - Neumann, T A Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 2258 EP - 2271 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 10 SN - 2169-9003, 2169-9003 KW - ablation KW - Arctic region KW - Greenland ice sheet KW - ice cover KW - glaciers KW - ice sheets KW - climate change KW - ice movement KW - Greenland KW - mass balance KW - climate effects KW - glacial geology KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036742?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.atitle=Caterpillar-like+ice+motion+in+the+ablation+zone+of+the+Greenland+ice+sheet&rft.au=Ryser%2C+C%3BLuethi%2C+M+P%3BAndrews%2C+L+C%3BCatania%2C+G+A%3BFunk%2C+M%3BHawley%2C+R%3BHoffman%2C+M%3BNeumann%2C+T+A&rft.aulast=Ryser&rft.aufirst=C&rft.date=2014-10-01&rft.volume=119&rft.issue=10&rft.spage=2258&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.issn=21699003&rft_id=info:doi/10.1002%2F2013JF003067 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9011/issues?year=2013 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 40 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - ablation; Arctic region; climate change; climate effects; glacial geology; glaciers; Greenland; Greenland ice sheet; ice cover; ice movement; ice sheets; mass balance DO - http://dx.doi.org/10.1002/2013JF003067 ER - TY - JOUR T1 - River basin organization around the main stem; scale invariance in tributary branching and the incremental area function AN - 1656036676; 2015-013695 AB - The incremental increase in contributing area along a main stem river, called here the incremental area function (IAF), has direct relevance to the spatial heterogeneity of environmental fluxes (water, sediment, nutrients, etc.) entering the stream from hillslopes and side tributaries. It also dictates, to a large extent, possible ecohydrologic discontinuities or transitions resulting from large tributary contributions. Mathematically, the IAF directly reflects the topological and geometrical structure of the river network and maps the two-dimensional landscape organization into a one-dimensional function. In this paper, we use two approaches to investigate the spatial heterogeneity of the IAF. First, we implement a multithreshold decomposition on IAF to study the distribution of distances between tributaries as a function of the imposed threshold contributing area and verify the presence of a simple power law scaling relationship between the threshold and the average distance between tributaries. Second, we use a wavelet-based multiscale approach and document the presence of statistical self-affinity (multifractality) in the IAF with a high intermittency coefficient, reflecting the complex arrangement of extreme contributions of different size tributaries. We propose a multiplicative cascade model, parameterized in terms of basin-specific properties, to statistically simulate the IAF along the main stem. Finally, we point out the relation between the IAF and the widely used width function of a basin and show how the latter can be constructed from the former via a convolution on the self-similar structure of a tree. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Earth Surface AU - Gangodagamage, Chandana AU - Foufoula-Georgiou, Efi AU - Belmont, Patrick Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 2174 EP - 2193 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 10 SN - 2169-9003, 2169-9003 KW - United States KW - Eel River basin KW - landform evolution KW - Eel River KW - drainage patterns KW - tributaries KW - California KW - Humboldt County California KW - fluvial features KW - drainage basins KW - geomorphology KW - stream order KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036676?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.atitle=River+basin+organization+around+the+main+stem%3B+scale+invariance+in+tributary+branching+and+the+incremental+area+function&rft.au=Gangodagamage%2C+Chandana%3BFoufoula-Georgiou%2C+Efi%3BBelmont%2C+Patrick&rft.aulast=Gangodagamage&rft.aufirst=Chandana&rft.date=2014-10-01&rft.volume=119&rft.issue=10&rft.spage=2174&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.issn=21699003&rft_id=info:doi/10.1002%2F2014JF003304 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9011/issues?year=2013 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables, sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - California; drainage basins; drainage patterns; Eel River; Eel River basin; fluvial features; geomorphology; Humboldt County California; landform evolution; stream order; tributaries; United States DO - http://dx.doi.org/10.1002/2014JF003304 ER - TY - JOUR T1 - Uncertainty in prediction of radionuclide gas migration from underground nuclear explosions AN - 1623271438; 2014-091649 AB - Underground nuclear explosions (UNEs) produce radionuclide gases that may seep to the surface over weeks to months. The objective of this research was to quantify the impact of uncertainties in hydrologic parameters (fracture aperture, matrix permeability, porosity, and saturation) and season of detonation on the timing of gas breakthrough. Numerical sensitivity analyses were performed, with barometric pumping providing the primary driving force for gas migration, for the case of a 1 kt UNE at 400-m depth of burial. Gas arrival time was most affected by matrix permeability and fracture aperture. Gases having higher diffusivity were more sensitive to uncertainty in the rock properties. The effect of seasonality in the barometric pressure forcing was found to be important, with detonations in March the least likely to be detectable based on barometric data for Rainier Mesa, Nevada. Monte Carlo realizations were performed with all four parameters varying simultaneously to determine their interrelated effects. The Monte Carlo method was also used to predict the window of opportunity for (super 133) Xe detection from a 1 kt UNE at Rainier Mesa, with and without matching the model to SF (sub 6) and (super 3) He data from the 1993 Non-Proliferation Experiment. Results from the data-blind Monte Carlo simulations were similar but were biased toward earlier arrival time and less likely to show detectable (super 133) Xe. The estimated timing of gas arrival may be used to deploy personnel and equipment to the site of a suspected UNE, if allowed under the terms of the Comprehensive Nuclear Test-Ban Treaty. JF - Vadose Zone Journal AU - Jordan, Amy B AU - Stauffer, Philip H AU - Zyvoloski, George A AU - Person, Mark A AU - MacCarthy, Jonathan K AU - Anderson, Dale N Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 13 PB - Soil Science Society of America, Madison, WI VL - 13 IS - 10 KW - Basin and Range Province KW - underground space KW - fracture aperture KW - unsaturated zone KW - elastic waves KW - Nevada Test Site KW - finite element analysis KW - sensitivity analysis KW - nuclear explosions KW - arrival time KW - induced earthquakes KW - diffusivity KW - hydrology KW - North America KW - monitoring KW - numerical models KW - gaseous phase KW - explosions KW - xenon KW - Nye County Nevada KW - porosity KW - two-dimensional models KW - southern Nevada KW - detection KW - seasonal variations KW - earthquakes KW - Comprehensive Test Ban Treaty KW - United States KW - isotopes KW - He-3 KW - simulation KW - stable isotopes KW - seepage KW - fractures KW - radioactive isotopes KW - transport KW - Rainier Mesa KW - quantitative analysis KW - noble gases KW - tracers KW - Xe-133 KW - helium KW - uncertainty KW - Nevada KW - gas tracers KW - soils KW - sulfur hexafluoride KW - seismology KW - pressure KW - Monte Carlo analysis KW - statistical analysis KW - porous materials KW - boundary conditions KW - FEHM KW - saturation KW - Finite Element Heat and Mass transfer code KW - multiphase flow KW - permeability KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623271438?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Uncertainty+in+prediction+of+radionuclide+gas+migration+from+underground+nuclear+explosions&rft.au=Jordan%2C+Amy+B%3BStauffer%2C+Philip+H%3BZyvoloski%2C+George+A%3BPerson%2C+Mark+A%3BMacCarthy%2C+Jonathan+K%3BAnderson%2C+Dale+N&rft.aulast=Jordan&rft.aufirst=Amy&rft.date=2014-10-01&rft.volume=13&rft.issue=10&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2014.06.0070 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 45 N1 - PubXState - WI N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-11-13 N1 - SubjectsTermNotLitGenreText - arrival time; Basin and Range Province; boundary conditions; Comprehensive Test Ban Treaty; detection; diffusivity; earthquakes; elastic waves; explosions; FEHM; finite element analysis; Finite Element Heat and Mass transfer code; fracture aperture; fractures; gas tracers; gaseous phase; He-3; helium; hydrology; induced earthquakes; isotopes; monitoring; Monte Carlo analysis; multiphase flow; Nevada; Nevada Test Site; noble gases; North America; nuclear explosions; numerical models; Nye County Nevada; permeability; porosity; porous materials; pressure; quantitative analysis; radioactive isotopes; Rainier Mesa; saturation; seasonal variations; seepage; seismology; sensitivity analysis; simulation; soils; southern Nevada; stable isotopes; statistical analysis; sulfur hexafluoride; tracers; transport; two-dimensional models; uncertainty; underground space; United States; unsaturated zone; Xe-133; xenon DO - http://dx.doi.org/10.2136/vzj2014.06.0070 ER - TY - JOUR T1 - Impact of climate sensitivity and polar amplification on projections of Greenland Ice Sheet loss AN - 1611635882; 20793472 AB - The future rate of Greenland Ice Sheet (GrIS) deglaciation and the future contribution of GrIS deglaciation to sea level rise will depend critically on the magnitude of northern hemispheric polar amplification and global equilibrium climate sensitivity. Here, these relationships are analyzed using an ensemble of multi-century coupled ice-sheet/climate model simulations seeded with observationally-constrained initial conditions and then integrated forward under tripled preindustrial CO sub(2). Polar amplifications and climate sensitivities were varied between ensemble members in order to bracket current uncertainty in polar amplification and climate sensitivity. A large inter-ensemble spread in mean GrIS air temperature, albedo and surface mass balance trends stemming from this uncertainty resulted in GrIS ice volume loss ranging from 5 to 40 % of the original ice volume after 500 years. The large dependence of GrIS deglaciation on polar amplification and climate sensitivity that we find indicates that the representation of these processes in climate models will exert a strong control on any simulated predictions of multi-century GrIS evolution. Efforts to reduce polar amplification and equilibrium climate sensitivity uncertainty will therefore play a critical role in constraining projections of GrIS deglaciation and sea level rise in a future high-CO sub(2) world. JF - Climate Dynamics AU - Fyke, Jeremy AU - Eby, Michael AU - Mackintosh, Andrew AU - Weaver, Andrew AD - Los Alamos National Laboratory, MS B216, Los Alamos, NM, 87545, USA, fyke@lanl.gov Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 2249 EP - 2260 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 43 IS - 7-8 SN - 0930-7575, 0930-7575 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Prediction KW - Greenland ice sheet KW - Sea level rise KW - Atmospheric circulation-oceanic circulation coupled models KW - Air temperature KW - Sea Level KW - Climate sensitivity KW - Sea Ice KW - Initial conditions KW - Marine KW - Climate models KW - PN, Greenland, Greenland Ice Sheet KW - Albedo KW - Climates KW - Climate KW - Deglaciation KW - Ice volume KW - Projections KW - Model Studies KW - Equilibrium KW - Numerical simulations KW - Glaciation KW - Temperature trends KW - Carbon dioxide KW - Evolution KW - Sea level changes KW - M2 551.324:Land Ice/Glaciers (551.324) KW - SW 0810:General KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1611635882?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+Dynamics&rft.atitle=Impact+of+climate+sensitivity+and+polar+amplification+on+projections+of+Greenland+Ice+Sheet+loss&rft.au=Fyke%2C+Jeremy%3BEby%2C+Michael%3BMackintosh%2C+Andrew%3BWeaver%2C+Andrew&rft.aulast=Fyke&rft.aufirst=Jeremy&rft.date=2014-10-01&rft.volume=43&rft.issue=7-8&rft.spage=2249&rft.isbn=&rft.btitle=&rft.title=Climate+Dynamics&rft.issn=09307575&rft_id=info:doi/10.1007%2Fs00382-014-2050-7 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Number of references - 38 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Albedo; Climate; Glaciation; Deglaciation; Ice volume; Carbon dioxide; Air temperature; Sea level changes; Climate models; Numerical simulations; Climate sensitivity; Sea level rise; Greenland ice sheet; Temperature trends; Initial conditions; Atmospheric circulation-oceanic circulation coupled models; Prediction; Sea Level; Equilibrium; Sea Ice; Climates; Projections; Evolution; Model Studies; PN, Greenland, Greenland Ice Sheet; Marine DO - http://dx.doi.org/10.1007/s00382-014-2050-7 ER - TY - JOUR T1 - Pore scale study of dissolution-induced changes in permeability and porosity of porous media AN - 1673366132; 2015-033504 AB - We apply a reactive transport lattice Boltzmann model developed in previous studies to study the dissolution-induced changes in permeability and porosity of two porous media at the pore scale. The permeability-porosity relationship is explored for a wide range of Peclet and Damkohler numbers. It is found that this relationship depends not only on different dissolution regimes characterized by Pe and Da, but also on the specific porous medium structure. The permeability-porosity relationship for the more geometrically complex porous medium shows much more complexity than that for the simple fractured medium. While a very small Da sets an upper bound for the permeability-porosity relationship for the simple medium, a combination of a high Da and Pe results in wormholing, and the fastest permeability increase for the complex medium. At a moderate Pe but large Da, a transition from transport-limited dissolution regime to wormholing is also observed for the complex medium. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Hydrology AU - Kang, Qinjun AU - Chen, Li AU - Valocchi, Albert J AU - Viswanathan, Hari S Y1 - 2014/09/19/ PY - 2014 DA - 2014 Sep 19 SP - 1049 EP - 1055 PB - Elsevier, Amsterdam VL - 517 SN - 0022-1694, 0022-1694 KW - numerical analysis KW - data processing KW - porous materials KW - mathematical models KW - equations KW - solubility KW - simulation KW - porosity KW - two-dimensional models KW - reservoir rocks KW - ground water KW - solid phase KW - transport KW - naturally fractured reservoirs KW - mathematical methods KW - lattice Boltzmann method KW - Reynolds number KW - reservoir properties KW - pore water KW - permeability KW - Peclet number KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366132?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology&rft.atitle=Pore+scale+study+of+dissolution-induced+changes+in+permeability+and+porosity+of+porous+media&rft.au=Kang%2C+Qinjun%3BChen%2C+Li%3BValocchi%2C+Albert+J%3BViswanathan%2C+Hari+S&rft.aulast=Kang&rft.aufirst=Qinjun&rft.date=2014-09-19&rft.volume=517&rft.issue=&rft.spage=1049&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2014.06.045 L2 - http://www.sciencedirect.com/science/journal/00221694 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 41 N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-08-13 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - data processing; equations; ground water; lattice Boltzmann method; mathematical methods; mathematical models; naturally fractured reservoirs; numerical analysis; Peclet number; permeability; pore water; porosity; porous materials; reservoir properties; reservoir rocks; Reynolds number; simulation; solid phase; solubility; transport; two-dimensional models DO - http://dx.doi.org/10.1016/j.jhydrol.2014.06.045 ER - TY - JOUR T1 - Seismic tomography of the Colorado Rocky Mountains upper mantle from CREST; lithosphere-asthenosphere interactions and mantle support of topography AN - 1566814959; 2014-076372 AB - The CREST experiment (Colorado Rocky Mountains Experiment and Seismic Transects) integrated the EarthScope USArray Transportable Array with portable and permanent stations to provide detailed seismic imaging of crust and mantle properties beneath the highest topography region of the Rocky Mountains. Inverting approximately 14,600 P- and 3600 S-wave arrival times recorded at 160 stations for upper mantle V (sub p) and V (sub s) structure, we find that large V (sub p) perturbations relative to AK135 of 7% and V (sub s) variations of 8% take place over very short (approaching tens of kilometers) lateral distances. Highest heterogeneity is observed in the upper 300 km of the mantle, but well resolved low velocity features extend to the top of the transition zone in portions of these images. The previously noted low velocity upper mantle Aspen Anomaly is resolved into multiple features. The lowest V (sub p) and V (sub s) velocities in the region are found beneath the San Juan Mountains, which is clearly distinguished from other low velocity features of the northern Rio Grande Rift, Taos/Latir region, Aspen region, and below the Never Summer Mountains. We suggest that the San Juan anomaly, and a similar feature below the Taos/Latir region of northern New Mexico, are related to delamination and remnant heat (and melt) beneath these sites of extraordinarily voluminous middle-Cenozoic volcanism. We interpret a northeast-southwest grain in velocity structure that parallels the Colorado Mineral belt to depths near 150 km as being reflective of control by uppermost mantle Proterozoic accretionary lithospheric architecture. Further to the north and west, the Wyoming province and northern Colorado Plateau show high velocity features indicative of thick ( approximately 150 km) preserved Archean and Proterozoic lithosphere, respectively. Overall, we interpret the highly heterogeneous uppermost mantle velocity structure beneath the southern Rocky Mountains as reflecting interfingered chemical Proterozoic lithosphere that has been, is currently being, replaced and modified by upwelling asthenosphere. Low velocity features resolved here indicate that this process may be sourced as deeply as the top of the mantle transition zone at 410 km. One driving mechanism for this is upper mantle interaction between upwelling hydration-induced partial melt and destabilized downwelling lithosphere in the deeper upper mantle. Tomographic imaging of mantle seismic velocity and crustal thickness results and modeling from the CREST experiment indicate that the highest elevations of the Colorado Rocky Mountains are substantially supported by the mantle, and strong correlations between low velocity mantle and thin crust/high topography are noted across the region. This, along with rich upper mantle seismic heterogeneity, suggests that mantle buoyancy and dynamics are central to present day topographic support and recent geomorphic evolution of the region. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - MacCarthy, J K AU - Aster, R C AU - Dueker, K AU - Hansen, S AU - Schmandt, B AU - Karlstrom, K Y1 - 2014/09/15/ PY - 2014 DA - 2014 Sep 15 SP - 107 EP - 119 PB - Elsevier, Amsterdam VL - 402 SN - 0012-821X, 0012-821X KW - United States KW - upwelling KW - P-waves KW - density KW - seismic anomalies KW - partial melting KW - mantle KW - elastic waves KW - New Mexico KW - Rio Grande Rift KW - low-velocity zones KW - topography KW - heat flow KW - velocity KW - San Juan Basin KW - geothermal gradient KW - arrival time KW - EarthScope KW - upper mantle KW - North America KW - body waves KW - USArray KW - CREST experiment KW - three-dimensional models KW - lithosphere KW - Taos Plateau KW - convection KW - hydration KW - asthenosphere KW - delamination KW - transition zones KW - velocity structure KW - Colorado Rocky Mountains Experiment and Seismic Transects KW - seismic waves KW - geomorphology KW - Colorado KW - S-waves KW - Rocky Mountains KW - crust KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566814959?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+and+Planetary+Science+Letters&rft.atitle=Seismic+tomography+of+the+Colorado+Rocky+Mountains+upper+mantle+from+CREST%3B+lithosphere-asthenosphere+interactions+and+mantle+support+of+topography&rft.au=MacCarthy%2C+J+K%3BAster%2C+R+C%3BDueker%2C+K%3BHansen%2C+S%3BSchmandt%2C+B%3BKarlstrom%2C+K&rft.aulast=MacCarthy&rft.aufirst=J&rft.date=2014-09-15&rft.volume=402&rft.issue=&rft.spage=107&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.03.063 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 69 N1 - Document feature - illus. incl. sects., sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-10-02 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - arrival time; asthenosphere; body waves; Colorado; Colorado Rocky Mountains Experiment and Seismic Transects; convection; CREST experiment; crust; delamination; density; EarthScope; elastic waves; geomorphology; geothermal gradient; heat flow; hydration; lithosphere; low-velocity zones; mantle; New Mexico; North America; P-waves; partial melting; Rio Grande Rift; Rocky Mountains; S-waves; San Juan Basin; seismic anomalies; seismic waves; Taos Plateau; three-dimensional models; topography; transition zones; United States; upper mantle; upwelling; USArray; velocity; velocity structure DO - http://dx.doi.org/10.1016/j.epsl.2014.03.063 ER - TY - JOUR T1 - Aeolian sediment and dust fluxes during predominant background wind conditions for unburned and burned semi-arid grassland; interplay between particle size and temporal scale AN - 1832683315; 768866-10 AB - Monitoring of aeolian transport is needed for assessment and management of human health risks as well as for soil resources. Human health risks are assessed based on duration of exposure as well as concentration. Many aeolian studies focus on periods of high wind speed when concentrations are greatest but few studies focus on "background" conditions when concentrations are likely lower but which represent the most prevalent conditions. Such "background" conditions might be especially important at sites with recent disturbance such as fire. Exposure assessments also require improved understanding relating longer-term (days to weeks) measurements of saltation of larger particles to shorter-term (minutes to hours) measurements of smaller inhalable dust particles. To address these issues, we employed three commonly used instruments for measuring dust emissions for unburned and recently-burned sites: Big Springs Number Eight (BSNE) samplers for larger saltating soil particles (>50 mu m) with weekly to monthly sampling resolution, DustTraks for suspended particles (diameters <10 mu m) with 1-s sampling resolution, and Total Suspended Particulate (TSP) filter samplers for measuring with hourly to daily sampling resolution. Significant differences in concentrations between burned and unburned sites were detectable in either short (1-s maximum) interval DustTrak PM10 measurements, or in longer term (weekly) BSNE horizontal sediment flux measurements, but not in intermediate-term (daily 5-h means) for either DustTrak PM10 or TSP measurements. The results highlight ongoing dust emissions during less windy periods and provide insight into the complex interplay among particle-size dependent measures and typical time scales measured. JF - Aeolian Research AU - Merino Martin, Luis AU - Field, Jason P AU - Villegas, Juan Camilo AU - Whicker, Jeffrey J AU - Breshears, David D AU - Law, Darin J AU - Urgeghe, Anna M Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 97 EP - 103 PB - Elsevier, Amsterdam VL - 14 SN - 1875-9637, 1875-9637 KW - United States KW - terrestrial environment KW - erosion KW - semi-arid environment KW - suspended materials KW - vegetation KW - land loss KW - fires KW - transport KW - sampling KW - sediments KW - Tucson Arizona KW - particulate materials KW - soil erosion KW - Pima County Arizona KW - soils KW - sediment transport KW - clastic sediments KW - grain size KW - statistical analysis KW - wind erosion KW - Santa Rita Experimental Range KW - saltation KW - dust KW - Arizona KW - grasslands KW - aerosols KW - temporal distribution KW - wind transport KW - winds KW - 06A:Sedimentary petrology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832683315?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Aeolian+Research&rft.atitle=Aeolian+sediment+and+dust+fluxes+during+predominant+background+wind+conditions+for+unburned+and+burned+semi-arid+grassland%3B+interplay+between+particle+size+and+temporal+scale&rft.au=Merino+Martin%2C+Luis%3BField%2C+Jason+P%3BVillegas%2C+Juan+Camilo%3BWhicker%2C+Jeffrey+J%3BBreshears%2C+David+D%3BLaw%2C+Darin+J%3BUrgeghe%2C+Anna+M&rft.aulast=Merino+Martin&rft.aufirst=Luis&rft.date=2014-09-01&rft.volume=14&rft.issue=&rft.spage=97&rft.isbn=&rft.btitle=&rft.title=Aeolian+Research&rft.issn=18759637&rft_id=info:doi/10.1016%2Fj.aeolia.2014.02.004 L2 - http://www.sciencedirect.com/science/journal/18759637 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Number of references - 36 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aerosols; Arizona; clastic sediments; dust; erosion; fires; grain size; grasslands; land loss; particulate materials; Pima County Arizona; saltation; sampling; Santa Rita Experimental Range; sediment transport; sediments; semi-arid environment; soil erosion; soils; statistical analysis; suspended materials; temporal distribution; terrestrial environment; transport; Tucson Arizona; United States; vegetation; wind erosion; wind transport; winds DO - http://dx.doi.org/10.1016/j.aeolia.2014.02.004 ER - TY - JOUR T1 - Introduction to a Special issue of Aeolian Research; airborne mineral dust contaminants; impacts on human health and the environment AN - 1832683084; 768866-2 JF - Aeolian Research AU - Breshears, David D AU - Whicker, Jeffrey J AU - Saez, Avelino Eduardo AU - Field, Jason P Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1 EP - 2 PB - Elsevier, Amsterdam VL - 14 SN - 1875-9637, 1875-9637 KW - clastic sediments KW - dust KW - sediments KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832683084?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Aeolian+Research&rft.atitle=Introduction+to+a+Special+issue+of+Aeolian+Research%3B+airborne+mineral+dust+contaminants%3B+impacts+on+human+health+and+the+environment&rft.au=Breshears%2C+David+D%3BWhicker%2C+Jeffrey+J%3BSaez%2C+Avelino+Eduardo%3BField%2C+Jason+P&rft.aulast=Breshears&rft.aufirst=David&rft.date=2014-09-01&rft.volume=14&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Aeolian+Research&rft.issn=18759637&rft_id=info:doi/10.1016%2Fj.aeolia.2014.05.001 L2 - http://www.sciencedirect.com/science/journal/18759637 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - clastic sediments; dust; sediments DO - http://dx.doi.org/10.1016/j.aeolia.2014.05.001 ER - TY - JOUR T1 - Progress on relationships between horizontal and vertical dust flux; mathematical, empirical and risk-based perspectives AN - 1832680137; 768866-11 AB - Aeolian processes driving sediment flux and corresponding erosion are inherently 3-dimensional, but are primarily studied either with respect to the horizontal flux component, or to a lesser extent the vertical component. Understanding the relationship between horizontal flux and the vertical component of sediment and dust is critical to predicting fundamental processes such as erosion, and to assessing human and environmental risks associated with contaminated sediment and dust. Multiple mathematical approaches to calculate vertical flux of dust exist but are limited in their ability to predict vertical flux across a wide variety of landscapes and soil conditions. To address these issues, here we explore the relationship between horizontal and vertical fluxes from three perspectives: mathematical, based on existing equations; empirical, based on existing and new data; and risk-based, based on translating the former two into a risk context. Mathematical derivations suggest, depending on the approach, the two components could either be a constant ratio or that the vertical flux could be more dependent on the shear stress and particle size than horizontal flux. Empirical data highlight a wide range of ratios, varying by more than two orders of magnitude, though the ratios can be relatively similar within a given site and set of conditions. Risk-based assessment indicates the vertical flux component is relatively important in dose calculations, and consequently further improvement in mathematical and empirical relationships is needed. Collectively, these three perspectives expand insights on horizontal and vertical sediment fluxes and could aide future risk assessment from dust contaminants. JF - Aeolian Research AU - Whicker, Jeffrey J AU - Breshears, David D AU - Field, Jason P Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 105 EP - 111 PB - Elsevier, Amsterdam VL - 14 SN - 1875-9637, 1875-9637 KW - United States KW - hazardous waste KW - isotopes KW - erosion KW - plutonium KW - Pu-239 KW - land loss KW - air pollution KW - California KW - Inyo County California KW - radioactive isotopes KW - transport KW - sediments KW - soil erosion KW - vertical movements KW - soils KW - three-dimensional models KW - sediment transport KW - clastic sediments KW - pollutants KW - Monte Carlo analysis KW - statistical analysis KW - suspension KW - pollution KW - Owens Lake KW - measurement KW - saltation KW - soil pollution KW - metals KW - mathematical methods KW - dust KW - risk assessment KW - wind transport KW - actinides KW - public health KW - 06A:Sedimentary petrology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832680137?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Aeolian+Research&rft.atitle=Progress+on+relationships+between+horizontal+and+vertical+dust+flux%3B+mathematical%2C+empirical+and+risk-based+perspectives&rft.au=Whicker%2C+Jeffrey+J%3BBreshears%2C+David+D%3BField%2C+Jason+P&rft.aulast=Whicker&rft.aufirst=Jeffrey&rft.date=2014-09-01&rft.volume=14&rft.issue=&rft.spage=105&rft.isbn=&rft.btitle=&rft.title=Aeolian+Research&rft.issn=18759637&rft_id=info:doi/10.1016%2Fj.aeolia.2013.12.001 L2 - http://www.sciencedirect.com/science/journal/18759637 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Number of references - 41 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - actinides; air pollution; California; clastic sediments; dust; erosion; hazardous waste; Inyo County California; isotopes; land loss; mathematical methods; measurement; metals; Monte Carlo analysis; Owens Lake; plutonium; pollutants; pollution; Pu-239; public health; radioactive isotopes; risk assessment; saltation; sediment transport; sediments; soil erosion; soil pollution; soils; statistical analysis; suspension; three-dimensional models; transport; United States; vertical movements; wind transport DO - http://dx.doi.org/10.1016/j.aeolia.2013.12.001 ER - TY - JOUR T1 - The effects of physical and geochemical heterogeneities on hydro-geochemical transport and effective reaction rates AN - 1828845714; 2016-085590 AB - The role of coupled physical and geochemical heterogeneities in hydro-geochemical transport is investigated by simulating three-dimensional transport in a heterogeneous system with kinetic mineral reactions. Ensembles of 100 physically heterogeneous realizations were simulated for three geochemical conditions: 1) spatially homogeneous reactive mineral surface area, 2) reactive surface area positively correlated to hydraulic heterogeneity, and 3) reactive surface area negatively correlated to hydraulic heterogeneity. Groundwater chemistry and the corresponding effective reaction rates were calculated at three transverse planes to quantify differences in plume evolution due to heterogeneity in mineral reaction rates and solute residence time (tau ). The model is based on a hypothetical CO (sub 2) intrusion into groundwater from a carbon capture utilization and storage (CCUS) operation where CO (sub 2) dissolution and formation of carbonic acid created geochemical dis-equilibrium between fluids and the mineral galena that resulted in increased aqueous lead (Pb (super 2+) ) concentrations. Calcite dissolution buffered the pH change and created conditions of galena oversaturation, which then reduced lead concentrations along the flow path. Near the leak kinetic geochemical reactions control the release of solutes into the fluid, but further along the flow path mineral solubility controls solute concentrations. Simulation results demonstrate the impact of heterogeneous distribution of geochemical reactive surface area in coordination with physical heterogeneity on the effective reaction rate (K (sub rxn,eff) ) and Pb (super 2+) concentrations within the plume. Dissimilarities between ensemble Pb (super 2+) concentration and K (sub rxn,eff) are attributed to how geochemical heterogeneity affects the time (tau (sub eq) ) and therefore advection distance (L (sub eq) ) required for the system to re-establish geochemical equilibrium. Only after geochemical equilibrium is re-established, K (sub rxn,eff) and Pb (super 2+) concentrations are the same for all three geochemical conditions. Correlation between reactive surface area and hydraulic conductivity, either positive or negative, results in variation in tau (sub eq) and L (sub eq) . Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Contaminant Hydrology AU - Atchley, Adam L AU - Navarre-Sitchler, Alexis K AU - Maxwell, Reed M Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 53 EP - 64 PB - Elsevier, Amsterdam VL - 165 SN - 0169-7722, 0169-7722 KW - solute transport KW - plumes KW - carbonic acid KW - contaminant plumes KW - lead KW - hydrogeology KW - simulation KW - ground water KW - carbon dioxide KW - chemical reactions KW - transport KW - chemical properties KW - reactive transport KW - heterogeneity KW - inorganic acids KW - pH KW - mineral surface KW - solutes KW - pollution KW - rates KW - solubility KW - calcite KW - aquifers KW - physical properties KW - galena KW - metals KW - residence time KW - hydraulic conductivity KW - sulfides KW - carbonates KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828845714?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Contaminant+Hydrology&rft.atitle=The+effects+of+physical+and+geochemical+heterogeneities+on+hydro-geochemical+transport+and+effective+reaction+rates&rft.au=Atchley%2C+Adam+L%3BNavarre-Sitchler%2C+Alexis+K%3BMaxwell%2C+Reed+M&rft.aulast=Atchley&rft.aufirst=Adam&rft.date=2014-09-01&rft.volume=165&rft.issue=&rft.spage=53&rft.isbn=&rft.btitle=&rft.title=Journal+of+Contaminant+Hydrology&rft.issn=01697722&rft_id=info:doi/10.1016%2Fj.jconhyd.2014.07.008 L2 - http://www.sciencedirect.com/science/journal/01697722 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 61 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - aquifers; calcite; carbon dioxide; carbonates; carbonic acid; chemical properties; chemical reactions; contaminant plumes; galena; ground water; heterogeneity; hydraulic conductivity; hydrogeology; inorganic acids; lead; metals; mineral surface; pH; physical properties; plumes; pollution; rates; reactive transport; residence time; simulation; solubility; solute transport; solutes; sulfides; transport DO - http://dx.doi.org/10.1016/j.jconhyd.2014.07.008 ER - TY - JOUR T1 - Least-squares reverse-time migration with a wavefield-separation imaging condition and updated source wavefields AN - 1656037347; 2015-016367 AB - Directly imaging steeply dipping fault zones is difficult for conventional migration, including reverse-time migration (RTM). We developed a new least-squares RTM (LSRTM) method to directly image steeply dipping fault zones. The method uses a wavefield-separation imaging condition and updated source wavefields during each iteration. Our new imaging method produces horizontal-looking images that show mostly steeply dipping fault zones. Conventional least-squares RTM does not update source wavefields and cannot directly image vertical fault zones. We numerically determined that it is crucial to update source wavefields to image steeply dipping fault zones. Using synthetic seismic data, we proved that our new LSRTM method can directly image steeply dipping fault zones with dipping angles up to 90 degrees . Compared with conventional LSRTM, our LSRTM method was less sensitive to the smoothness and the velocity error of the initial migration velocity model. JF - Geophysics AU - Tan, Sirui AU - Huang, Lianjie Y1 - 2014/09// PY - 2014 DA - September 2014 SP - S195 EP - S205 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 79 IS - 5 SN - 0016-8033, 0016-8033 KW - numerical models KW - data acquisition KW - statistical analysis KW - geophysical methods KW - data processing KW - equations KW - wave fields KW - seismic migration KW - seismic methods KW - least-squares analysis KW - mathematical methods KW - reverse time migration KW - faults KW - fault zones KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656037347?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysics&rft.atitle=Least-squares+reverse-time+migration+with+a+wavefield-separation+imaging+condition+and+updated+source+wavefields&rft.au=Tan%2C+Sirui%3BHuang%2C+Lianjie&rft.aulast=Tan&rft.aufirst=Sirui&rft.date=2014-09-01&rft.volume=79&rft.issue=5&rft.spage=S195&rft.isbn=&rft.btitle=&rft.title=Geophysics&rft.issn=00168033&rft_id=info:doi/10.1190%2Fgeo2014-0020.1 L2 - http://library.seg.org/journal/gpysa7 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 16 N1 - PubXState - OK N1 - Document feature - illus. N1 - Last updated - 2015-04-16 N1 - CODEN - GPYSA7 N1 - SubjectsTermNotLitGenreText - data acquisition; data processing; equations; fault zones; faults; geophysical methods; least-squares analysis; mathematical methods; numerical models; reverse time migration; seismic methods; seismic migration; statistical analysis; wave fields DO - http://dx.doi.org/10.1190/geo2014-0020.1 ER - TY - JOUR T1 - Validation of a three-dimensional finite-discrete element method using experimental results of the Split Hopkinson pressure bar test AN - 1648906985; 2015-011241 AB - A full-scale 3D analysis of a Split Hopkinson Pressure Bar experiment on granite material using a 3D combined Finite-Discrete Element Method (FDEM) is shown. Previous efforts to simulate Split Hopkinson Pressure Bar experiments using the 2D FDEM had obtained a very good match for the loading portion of the experiment. This work extends those efforts by modeling the entire 3D Split Hopkinson Pressure Bar experimental setup, and reproducing the softening behavior of the sample after breakage. This modeling effort introduces the effect of a compliant interface between the bars and the sample. Abstract Copyright (2014) Elsevier, B.V. JF - International Journal of Rock Mechanics and Mining Sciences (1997) AU - Rougier, E AU - Knight, E E AU - Broome, S T AU - Sussman, A J AU - Munjiza, A Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 101 EP - 108 PB - Elsevier, Oxford-New York VL - 70 SN - 1365-1609, 1365-1609 KW - mining KW - discrete element analysis KW - fragmentation KW - numerical models KW - underground mining KW - three-dimensional models KW - tensile strength KW - Split Hopkinson test KW - displacements KW - simulation KW - rock mechanics KW - fractures KW - finite element analysis KW - cracks KW - pressuremeter tests KW - block caving KW - faults KW - dynamic properties KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648906985?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.atitle=Validation+of+a+three-dimensional+finite-discrete+element+method+using+experimental+results+of+the+Split+Hopkinson+pressure+bar+test&rft.au=Rougier%2C+E%3BKnight%2C+E+E%3BBroome%2C+S+T%3BSussman%2C+A+J%3BMunjiza%2C+A&rft.aulast=Rougier&rft.aufirst=E&rft.date=2014-09-01&rft.volume=70&rft.issue=&rft.spage=101&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.issn=13651609&rft_id=info:doi/10.1016%2Fj.ijrmms.2014.03.011 L2 - http://www.sciencedirect.com/science/journal/13651609 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 31 N1 - Document feature - illus. N1 - Last updated - 2015-01-29 N1 - CODEN - IJRMA2 N1 - SubjectsTermNotLitGenreText - block caving; cracks; discrete element analysis; displacements; dynamic properties; faults; finite element analysis; fractures; fragmentation; mining; numerical models; pressuremeter tests; rock mechanics; simulation; Split Hopkinson test; tensile strength; three-dimensional models; underground mining DO - http://dx.doi.org/10.1016/j.ijrmms.2014.03.011 ER - TY - JOUR T1 - A simulator for modeling coupled thermo-hydro-mechanical processes in subsurface geological media AN - 1648906739; 2015-011276 AB - We present the description of a fully coupled simulator FEHM for modeling coupled thermo-hydro-mechanical (THM) processes in geomedia. The coupled equations for fluid flow and energy transport are implemented using finite volume whereas Galerkin finite element method is used for mechanical force balance. The simulator is designed to address spatial scales on the order of tens of centimeters to tens of kilometers, and time scales on the order of hours to tens of years. The governing coupled nonlinear equations are solved using a Newton-Rapshon scheme with analytically or numerically computed Jacobians. A suite of models is available for coupling flow and mechanical deformation via permeability-deformation relationships. The coupled simulator is verified by comparing with several analytical solutions developed for this purpose. A subset of the simulator capabilities is benchmarked against commercially available simulators. We also demonstrate a good match with data from Desert Peak geothermal field in Nevada, USA. This validation required the use of a shear failure model with non-linear permeability-stress relationship. In addition, we present another application involving fluid injection into an inclined fault zone using a non-orthogonal grid with stress-dependent Young's modulus and permeability. Abstract Copyright (2014) Elsevier, B.V. JF - International Journal of Rock Mechanics and Mining Sciences (1997) AU - Kelkar, S AU - Lewis, K AU - Karra, S AU - Zyvoloski, G AU - Rapaka, S AU - Viswanathan, H AU - Mishra, P K AU - Chu, S AU - Coblentz, D AU - Pawar, R Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 569 EP - 580 PB - Elsevier, Oxford-New York VL - 70 SN - 1365-1609, 1365-1609 KW - United States KW - Galerkin method KW - thermal conductivity KW - shear stress KW - elastic properties KW - elastic constants KW - simulation KW - rock mechanics KW - finite element analysis KW - fluid injection KW - sedimentary rocks KW - geothermal systems KW - heat flow KW - plasticity KW - confining pressure KW - Nevada KW - carbon sequestration KW - shale KW - thermal expansion KW - constitutive equations KW - thermomechanical properties KW - risk assessment KW - Desert Peak Field KW - clastic rocks KW - permeability KW - Young's modulus KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648906739?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.atitle=A+simulator+for+modeling+coupled+thermo-hydro-mechanical+processes+in+subsurface+geological+media&rft.au=Kelkar%2C+S%3BLewis%2C+K%3BKarra%2C+S%3BZyvoloski%2C+G%3BRapaka%2C+S%3BViswanathan%2C+H%3BMishra%2C+P+K%3BChu%2C+S%3BCoblentz%2C+D%3BPawar%2C+R&rft.aulast=Kelkar&rft.aufirst=S&rft.date=2014-09-01&rft.volume=70&rft.issue=&rft.spage=569&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.issn=13651609&rft_id=info:doi/10.1016%2Fj.ijrmms.2014.06.011 L2 - http://www.sciencedirect.com/science/journal/13651609 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 52 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-01-29 N1 - CODEN - IJRMA2 N1 - SubjectsTermNotLitGenreText - carbon sequestration; clastic rocks; confining pressure; constitutive equations; Desert Peak Field; elastic constants; elastic properties; finite element analysis; fluid injection; Galerkin method; geothermal systems; heat flow; Nevada; permeability; plasticity; risk assessment; rock mechanics; sedimentary rocks; shale; shear stress; simulation; thermal conductivity; thermal expansion; thermomechanical properties; United States; Young's modulus DO - http://dx.doi.org/10.1016/j.ijrmms.2014.06.011 ER - TY - JOUR T1 - Chemistry and texture of the rocks at Rocknest, Gale Crater; evidence for sedimentary origin and diagenetic alteration AN - 1645574414; 2015-004231 AB - A suite of eight rocks analyzed by the Curiosity Rover while it was stopped at the Rocknest sand ripple shows the greatest chemical divergence of any potentially sedimentary rocks analyzed in the early part of the mission. Relative to average Martian soil and to the stratigraphically lower units encountered as part of the Yellowknife Bay formation, these rocks are significantly depleted in MgO, with a mean of 1.3 wt %, and high in Fe, averaging over 20 wt % FeO (sub T) , with values between 15 and 26 wt % FeO (sub T) . The variable iron and low magnesium and rock texture make it unlikely that these are igneous rocks. Rock surface textures range from rough to smooth, can be pitted or grooved, and show various degrees of wind erosion. Some rocks display poorly defined layering while others seem to show possible fractures. Narrow vertical voids are present in Rocknest 3, one of the rocks showing the strongest layering. Rocks in the vicinity of Rocknest may have undergone some diagenesis similar to other rocks in the Yellowknife Bay Formation as indicated by the presence of soluble calcium phases. The most reasonable scenario is that fine-grained sediments, potentially a mixture of feldspar-rich rocks from Bradbury Rise and normal Martian soil, were lithified together by an iron-rich cement. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Blaney, D L AU - Wiens, R C AU - Maurice, S AU - Clegg, S M AU - Anderson, R B AU - Kah, L C AU - Le Mouelic, S AU - Ollila, A AU - Bridges, N AU - Tokar, R AU - Berger, G AU - Bridges, J C AU - Cousin, A AU - Clark, B AU - Dyar, M D AU - King, P L AU - Lanza, N AU - Mangold, N AU - Meslin, P Y AU - Newsom, H AU - Schroeder, S AU - Rowland, S AU - Johnson, J AU - Edgar, L AU - Gasnault, O AU - Forni, O AU - Schmidt, M AU - Goetz, W AU - Stack, K AU - Sumner, D Y AU - Fisk, M AU - Madsen, M B Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 2109 EP - 2131 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 9 SN - 2169-9097, 2169-9097 KW - calcium KW - Mars KW - ripple marks KW - layered materials KW - iron KW - emission spectra KW - bedding plane irregularities KW - sedimentary rocks KW - major elements KW - Curiosity Rover KW - LIBS spectra KW - spectra KW - cement KW - sedimentary structures KW - soils KW - ChemCam instrument KW - alkaline earth metals KW - laminations KW - textures KW - Yellowknife Bay Formation KW - Rocknest KW - terrestrial planets KW - planets KW - planar bedding structures KW - metals KW - diagenesis KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645574414?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Chemistry+and+texture+of+the+rocks+at+Rocknest%2C+Gale+Crater%3B+evidence+for+sedimentary+origin+and+diagenetic+alteration&rft.au=Blaney%2C+D+L%3BWiens%2C+R+C%3BMaurice%2C+S%3BClegg%2C+S+M%3BAnderson%2C+R+B%3BKah%2C+L+C%3BLe+Mouelic%2C+S%3BOllila%2C+A%3BBridges%2C+N%3BTokar%2C+R%3BBerger%2C+G%3BBridges%2C+J+C%3BCousin%2C+A%3BClark%2C+B%3BDyar%2C+M+D%3BKing%2C+P+L%3BLanza%2C+N%3BMangold%2C+N%3BMeslin%2C+P+Y%3BNewsom%2C+H%3BSchroeder%2C+S%3BRowland%2C+S%3BJohnson%2C+J%3BEdgar%2C+L%3BGasnault%2C+O%3BForni%2C+O%3BSchmidt%2C+M%3BGoetz%2C+W%3BStack%2C+K%3BSumner%2C+D+Y%3BFisk%2C+M%3BMadsen%2C+M+B&rft.aulast=Blaney&rft.aufirst=D&rft.date=2014-09-01&rft.volume=119&rft.issue=9&rft.spage=2109&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004590 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 48 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables, sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; bedding plane irregularities; calcium; cement; ChemCam instrument; Curiosity Rover; diagenesis; emission spectra; iron; laminations; layered materials; LIBS spectra; major elements; Mars; metals; planar bedding structures; planets; ripple marks; Rocknest; sedimentary rocks; sedimentary structures; soils; spectra; terrestrial planets; textures; Yellowknife Bay Formation DO - http://dx.doi.org/10.1002/2013JE004590 ER - TY - JOUR T1 - Calcium sulfate veins characterized by ChemCam/Curiosity at Gale Crater, Mars AN - 1645574359; 2015-004226 AB - The Curiosity rover has analyzed abundant light-toned fracture-fill material within the Yellowknife Bay sedimentary deposits. The ChemCam instrument, coupled with Mastcam and ChemCam/Remote Micro Imager images, was able to demonstrate that these fracture fills consist of calcium sulfate veins, many of which appear to be hydrated at a level expected for gypsum and bassanite. Anhydrite is locally present and is found in a location characterized by a nodular texture. An intricate assemblage of veins crosses the sediments, which were likely formed by precipitation from fluids circulating through fractures. The presence of veins throughout the entire approximately 5 m thick Yellowknife Bay sediments suggests that this process occurred well after sedimentation and cementation/lithification of those sediments. The sulfur-rich fluids may have originated in previously precipitated sulfate-rich layers, either before the deposition of the Sheepbed mudstones or from unrelated units such as the sulfates at the base of Mount Sharp. The occurrence of these veins after the episodes of deposition of fluvial sediments at the surface suggests persistent aqueous activity in relatively nonacidic conditions. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Nachon, M AU - Clegg, S M AU - Mangold, N AU - Schroeder, S AU - Kah, L C AU - Dromart, G AU - Ollila, A AU - Johnson, J R AU - Oehler, D Z AU - Bridges, J C AU - Le Mouelic, S AU - Forni, O AU - Wiens, R C AU - Anderson, R B AU - Blaney, D L AU - Bell, J F, III AU - Clark, B AU - Cousin, A AU - Dyar, M D AU - Ehlmann, B AU - Fabre, C AU - Gasnault, O AU - Grotzinger, J AU - Lasue, J AU - Lewin, E AU - Leveille, R AU - McLennan, S AU - Maurice, S AU - Meslin, P Y AU - Rapin, W AU - Rice, M AU - Squyres, S W AU - Stack, K AU - Sumner, D Y AU - Vaniman, D AU - Wellington, D Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1991 EP - 2016 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 9 SN - 2169-9097, 2169-9097 KW - hydrates KW - calcium sulfate KW - anhydrite KW - Mars KW - aqueous solutions KW - Sheepbed Member KW - bassanite KW - temperature KW - Gale Crater KW - emission spectra KW - fractures KW - sedimentary rocks KW - circulation KW - gypsum KW - Curiosity Rover KW - LIBS spectra KW - spectra KW - chemical composition KW - ChemCam instrument KW - sulfates KW - cementation KW - Yellowknife Bay Formation KW - sedimentation KW - fluid flow KW - veins KW - fluvial sedimentation KW - terrestrial planets KW - planets KW - hydration KW - precipitation KW - diagenesis KW - sulfur KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645574359?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Calcium+sulfate+veins+characterized+by+ChemCam%2FCuriosity+at+Gale+Crater%2C+Mars&rft.au=Nachon%2C+M%3BClegg%2C+S+M%3BMangold%2C+N%3BSchroeder%2C+S%3BKah%2C+L+C%3BDromart%2C+G%3BOllila%2C+A%3BJohnson%2C+J+R%3BOehler%2C+D+Z%3BBridges%2C+J+C%3BLe+Mouelic%2C+S%3BForni%2C+O%3BWiens%2C+R+C%3BAnderson%2C+R+B%3BBlaney%2C+D+L%3BBell%2C+J+F%2C+III%3BClark%2C+B%3BCousin%2C+A%3BDyar%2C+M+D%3BEhlmann%2C+B%3BFabre%2C+C%3BGasnault%2C+O%3BGrotzinger%2C+J%3BLasue%2C+J%3BLewin%2C+E%3BLeveille%2C+R%3BMcLennan%2C+S%3BMaurice%2C+S%3BMeslin%2C+P+Y%3BRapin%2C+W%3BRice%2C+M%3BSquyres%2C+S+W%3BStack%2C+K%3BSumner%2C+D+Y%3BVaniman%2C+D%3BWellington%2C+D&rft.aulast=Nachon&rft.aufirst=M&rft.date=2014-09-01&rft.volume=119&rft.issue=9&rft.spage=1991&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004588 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 79 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables, strat. col. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - anhydrite; aqueous solutions; bassanite; calcium sulfate; cementation; ChemCam instrument; chemical composition; circulation; Curiosity Rover; diagenesis; emission spectra; fluid flow; fluvial sedimentation; fractures; Gale Crater; gypsum; hydrates; hydration; LIBS spectra; Mars; planets; precipitation; sedimentary rocks; sedimentation; Sheepbed Member; spectra; sulfates; sulfur; temperature; terrestrial planets; veins; Yellowknife Bay Formation DO - http://dx.doi.org/10.1002/2013JE004588 ER - TY - JOUR T1 - Slant-Path Photon Buildup Factors in Dual-Layer Radiation Shields Comprising Polyethylene and Lead AN - 1642304561; 20892053 AB - Photon buildup factors provide a convenient method for radiation protection professionals to calculate dose and exposure behind various shielding configurations. Examination of buildup factors can also provide insight into the behavior of photons in these shields. Recent work has developed dual-layer buildup factors for several shielding configurations and a limited number of energies while slant-path buildup factors have been developed for single-layer shields. This work develops slant-path buildup factors for slab-geometric, dual-layer shields comprising polyethylene and lead at 25 energies conforming to the energies used in the buildup factor standard ANSI/ANS-6.4.3-1991 (W2001), "Gamma-Ray Attenuation Coefficients and Buildup Factors for Engineering Materials," between 10 MeV and 10 MeV. Further, the increased energy resolution of the calculations performed in this work allows the energy at which the previously identified "buildup reversal" phenomenon occurs to be more precisely identified. The effect of mesh spacing and quadrature resolution on fluence through the shields is also considered. JF - Nuclear Science and Engineering AU - Davis, Adam AU - Dudziak, Donald J AU - Kornreich, Drew E AD - AET-2, Los Alamos National Laboratory Mailstop E548, Los Alamos, New Mexico 87545 adamdavisne@gmail.com Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 42 EP - 56 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 178 IS - 1 SN - 0029-5639, 0029-5639 KW - Mechanical & Transportation Engineering Abstracts (MT); Advanced Polymers Abstracts (EP); Environmental Engineering Abstracts (EN); Composites Industry Abstracts (ED); Engineered Materials Abstracts, Ceramics (EC); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Energy use KW - Shields KW - Photons KW - Construction standards KW - Construction KW - Construction materials KW - Polyethylenes KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642304561?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Science+and+Engineering&rft.atitle=Slant-Path+Photon+Buildup+Factors+in+Dual-Layer+Radiation+Shields+Comprising+Polyethylene+and+Lead&rft.au=Davis%2C+Adam%3BDudziak%2C+Donald+J%3BKornreich%2C+Drew+E&rft.aulast=Davis&rft.aufirst=Adam&rft.date=2014-09-01&rft.volume=178&rft.issue=1&rft.spage=42&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/10.13182%2FNSE13-10 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Number of references - 31 N1 - Last updated - 2015-01-06 DO - http://dx.doi.org/10.13182/NSE13-10 ER - TY - JOUR T1 - Fast Neutron-Induced Fission Cross Sections of super(233, 234, 236, 238)U up to 200 MeV AN - 1642304039; 20892054 AB - The super(233,234,236,238)U fission cross sections have been measured relative to super(235)U(n,f) for incident neutron energies from 200 keV to 200 MeV using neutron time-of-flight at the Los Alamos Neutron Science Center. The results are generally consistent with the current ENDF/B-VII evaluation, but some discrepancies with previous measurements above 20 to 30 MeV are observed. These measurements are part of a campaign to measure fission cross sections with high precision in support of fast reactor technology. JF - Nuclear Science and Engineering AU - Tovesson, F AU - Laptev, A AU - Hill, T S AD - Los Alamos National Laboratory Los Alamos, New Mexico 87545 tovesson@lanl.gov Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 57 EP - 65 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 178 IS - 1 SN - 0029-5639, 0029-5639 KW - Solid State and Superconductivity Abstracts (SO); Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear fission KW - Energy use KW - Energy (nuclear) KW - Reactor technology KW - Cross sections KW - Fission UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642304039?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Science+and+Engineering&rft.atitle=Fast+Neutron-Induced+Fission+Cross+Sections+of+super%28233%2C+234%2C+236%2C+238%29U+up+to+200+MeV&rft.au=Tovesson%2C+F%3BLaptev%2C+A%3BHill%2C+T+S&rft.aulast=Tovesson&rft.aufirst=F&rft.date=2014-09-01&rft.volume=178&rft.issue=1&rft.spage=57&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/10.13182%2FNSE13-56 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Number of references - 27 N1 - Last updated - 2015-02-05 DO - http://dx.doi.org/10.13182/NSE13-56 ER - TY - JOUR T1 - Modeling the winter-spring transition of first-year ice in the western Weddell Sea AN - 1637541876; 2014-102284 AB - A new halodynamic scheme is coupled with the Los Alamos sea ice model to simulate western Weddell Sea ice during the winter-spring transition. One-dimensional temperature and salinity profiles are consistent with the warming and melt stages exhibited in first-year ice cores from the 2004 Ice Station POLarstern (ISPOL) expedition. Results are highly sensitive to snowfall. Simulations which use reanalysis precipitation data do not retain a snow cover beyond mid-December, and the warming transition occurs too rapidly. Model performance is greatly improved by prescribing a snowfall rate based on reported snow thicknesses. During ice growth prior to ISPOL, simulations indicate a period of thick snow and upper ice salinity enrichment. Gravity drainage model parameters impact the simulation immediately, while effects from the flushing parameter (snow porosity at the ice top) appear as the freeboard becomes negative. Simulations using a snow porosity of 0.3, consistent with that of wet snow, agree with salinity observations. The model does not include lateral sources of sea-water flooding, but vertical transport processes account for the high upper-ice salinities observed in ice cores at the start of the expedition. As the ice warms, a fresh upper-ice layer forms, and the high salinity layer migrates downward. This pattern is consistent with the early spring development stages of high-porosity layers observed in Antarctic sea ice that are associated with rich biological production. Future extensions of the model may be valuable in Antarctic ice-biogeochemical applications. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Jeffery, N AU - Hunke, E C Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 5891 EP - 5920 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 9 SN - 2169-9275, 2169-9275 KW - Southern Ocean KW - numerical models KW - sea ice KW - ice cover KW - atmospheric precipitation KW - salinity KW - climate change KW - temperature KW - spatial distribution KW - ice KW - snow KW - thickness KW - seasonal variations KW - Weddell Sea KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637541876?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Modeling+the+winter-spring+transition+of+first-year+ice+in+the+western+Weddell+Sea&rft.au=Jeffery%2C+N%3BHunke%2C+E+C&rft.aulast=Jeffery&rft.aufirst=N&rft.date=2014-09-01&rft.volume=119&rft.issue=9&rft.spage=5891&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2013JC009634 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - atmospheric precipitation; climate change; ice; ice cover; numerical models; salinity; sea ice; seasonal variations; snow; Southern Ocean; spatial distribution; temperature; thickness; Weddell Sea DO - http://dx.doi.org/10.1002/2013JC009634 ER - TY - JOUR T1 - N-substituted amine-borane ionic liquids as fluid phase, hydrogen storage materials AN - 1627963408; 20969018 AB - A selection of task specific N-substituted amine-borane ionic liquids (N-ABILs) were synthesized in good yield using silyl protecting groups with the aim of developing hydrogen (H sub(2)) storing fuels for automotive applications. A new anhydrous anion exchange method, based on trimethylsilyl reagents, was employed so sensitive pendant functionalities like borane could be incorporated. Controlled thermoylsis of N-ABILs indicate members of this class may be liquids pre- and post-dehydrogenation, joining a relatively small population of putative H sub(2) storing fuels that can be readily loaded/unloaded from a vehicle. N-ABILs were also blended with ammonia-borane to improve overall H sub(2) capacity, in one case by similar to 2.5. The products of thermolysis consist of co-oligomerized BN species and highly pure (<1% impurity) H sub(2) gas. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Rekken, B D AU - Carre-Burritt, A E AU - Scott, B L AU - Davis, B L AD - MPA-11; Materials Synthesis and Integrated Devices; MS J514; Los Alamos National Laboratory; Los Alamos; NM; 87545; USA; +1-505-667-3314; +1-505-500-2463; , bldavis@lanl.gov Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 16507 EP - 16515 PB - Royal Society of Chemistry VL - 2 IS - 39 SN - 2050-7488, 2050-7488 KW - Sustainability Science Abstracts KW - Storage KW - Anions KW - Fuels KW - Energy KW - Hydrogen KW - Sustainability KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627963408?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.atitle=N-substituted+amine-borane+ionic+liquids+as+fluid+phase%2C+hydrogen+storage+materials&rft.au=Rekken%2C+B+D%3BCarre-Burritt%2C+A+E%3BScott%2C+B+L%3BDavis%2C+B+L&rft.aulast=Rekken&rft.aufirst=B&rft.date=2014-09-01&rft.volume=2&rft.issue=39&rft.spage=16507&rft.isbn=&rft.btitle=&rft.title=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.issn=20507488&rft_id=info:doi/10.1039%2Fc4ta03853c LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Number of references - 23 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Storage; Anions; Energy; Fuels; Hydrogen; Sustainability DO - http://dx.doi.org/10.1039/c4ta03853c ER - TY - JOUR T1 - In situ characterization of shallow elastic nonlinear parameters with dynamic acoustoelastic testing AN - 1623256720; 2014-089630 AB - In situ measurement of the elastic nonlinear site response is advantageous to provide optimal information for prediction of strong ground motion at a site. We report the first implementation of a technique known as Dynamic Acoustoelastic Testing (DAET) in situ with the ultimate goal of developing a new approach for site characterization. DAET has shown promising results at the laboratory scale for the study of nonlinear elasticity of Earth materials, detailing the full nonlinear elastic properties of the studied sample. We demonstrate the feasibility of DAET in situ and compare it to other methods (nonlinear resonance spectroscopy, wave amplitude dependence of propagation velocity, and wave distortion). Nonlinear elastic properties are characterized by DAET with the advantage of providing a local assessment compared to other methods, here at a depth of 4 m to 5 m. A vertical dynamic strain amplitude of 5 X10 (super -5) produces a relative change in compressional wave modulus of 6%. We measure an effective parameter of quadratic elastic nonlinearity of order -10 (super 3) , the same order of magnitude measured at the laboratory scale in rocks and in packs of unconsolidated glass beads. Hysteresis is observed in the variation in soil elasticity as a function of the instantaneous dynamic strain that evolves as the dynamic strain amplitude is increased from 9 X10 (super -7) to 5 X10 (super -5) . Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Renaud, G AU - Riviere, J AU - Larmat, C AU - Rutledge, J T AU - Lee, R C AU - Guyer, R A AU - Stokoe, K AU - Johnson, P A Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 6907 EP - 6923 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 9 SN - 2169-9313, 2169-9313 KW - soils KW - P-waves KW - body waves KW - hysteresis KW - elasticity KW - in situ KW - strain KW - elastic properties KW - nonlinear materials KW - characterization KW - elastic waves KW - feasibility studies KW - shallow depth KW - strong motion KW - ground motion KW - elastodynamic properties KW - seismic waves KW - dynamic properties KW - amplitude KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=In+situ+characterization+of+shallow+elastic+nonlinear+parameters+with+dynamic+acoustoelastic+testing&rft.au=Renaud%2C+G%3BRiviere%2C+J%3BLarmat%2C+C%3BRutledge%2C+J+T%3BLee%2C+R+C%3BGuyer%2C+R+A%3BStokoe%2C+K%3BJohnson%2C+P+A&rft.aulast=Renaud&rft.aufirst=G&rft.date=2014-09-01&rft.volume=119&rft.issue=9&rft.spage=6907&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2013JB010625 L2 - http://onlineLibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 49 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - amplitude; body waves; characterization; dynamic properties; elastic properties; elastic waves; elasticity; elastodynamic properties; feasibility studies; ground motion; hysteresis; in situ; nonlinear materials; P-waves; seismic waves; shallow depth; soils; strain; strong motion DO - http://dx.doi.org/10.1002/2013JB010625 ER - TY - JOUR T1 - Optimal initial conditions for coupling ice sheet models to Earth system models AN - 1623256282; 2014-089609 AB - We address complications in the coupling of a dynamic ice sheet model (ISM) and forcing from an Earth system model (ESM), which arise because of the unknown ISM initial conditions. Unless explicitly accounted for during ISM initialization, the ice sheet is far from thermomechanical equilibrium with the surface mass balance forcing from the ESM. Upon coupling to ESM forcing, the result is a shock and unphysical and undesirable transients in ice geometry and other state variables. Under the assumption of thermomechanical equilibrium, we present an approach for finding ISM initial conditions-characterized by optimization of the basal sliding coefficient and basal topography fields-that balance a best fit to surface velocity and basal topography observations against the minimization of unphysical transients when coupling to surface mass balance forcing. A quasi-Newton method is used to solve the resulting large-scale, partial differential equation-constrained optimization problem, where the cost function gradients with respect to the parameter fields are computed using adjoints. After studying properties of our approach on a synthetic test problem, we apply the method toward obtaining optimal initial conditions for a model of the Greenland ice sheet. Our results show that, in the presence of uncertainties in the basal topography, ice thickness should also be treated as an optimization variable. While the focus here is on the coupling between an ISM and ESM-derived surface mass balance, the method is easily extended to include optimal coupling to forcing from an ocean model through submarine melt rates. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Earth Surface AU - Perego, Mauro AU - Price, Stephen AU - Stadler, Georg Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1894 EP - 1917 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 9 SN - 2169-9003, 2169-9003 KW - Arctic region KW - Greenland ice sheet KW - optimization KW - coupling KW - direct problem KW - equilibrium KW - ice sheets KW - noise KW - models KW - Greenland KW - topography KW - mass balance KW - steady-state processes KW - velocity KW - thickness KW - thermomechanical properties KW - applications KW - algorithms KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256282?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.atitle=Optimal+initial+conditions+for+coupling+ice+sheet+models+to+Earth+system+models&rft.au=Perego%2C+Mauro%3BPrice%2C+Stephen%3BStadler%2C+Georg&rft.aulast=Perego&rft.aufirst=Mauro&rft.date=2014-09-01&rft.volume=119&rft.issue=9&rft.spage=1894&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.issn=21699003&rft_id=info:doi/10.1002%2F2014JF003181 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9011/issues?year=2013 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 55 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - algorithms; applications; Arctic region; coupling; direct problem; equilibrium; Greenland; Greenland ice sheet; ice sheets; mass balance; models; noise; optimization; steady-state processes; thermomechanical properties; thickness; topography; velocity DO - http://dx.doi.org/10.1002/2014JF003181 ER - TY - JOUR T1 - Blind source separation for groundwater pressure analysis based on nonnegative matrix factorization AN - 1622604998; 20865299 AB - The identification of the physical sources causing spatial and temporal fluctuations of aquifer water levels is a challenging, yet a very important hydrogeological task. The fluctuations can be caused by variations in natural and anthropogenic sources such as pumping, recharge, barometric pressures, etc. The source identification can be crucial for conceptualization of the hydrogeological conditions and characterization of aquifer properties. We propose a new computational framework for model-free inverse analysis of pressure transients based on Nonnegative Matrix Factorization (NMF) method for Blind Source Separation (BSS) coupled with k-means clustering algorithm, which we call NMFk. NMFk is capable of identifying a set of unique sources from a set of experimentally measured mixed signals, without any information about the sources, their transients, and the physical mechanisms and properties controlling the signal propagation through the subsurface flow medium. Our analysis only requires information about pressure transients at a number of observation points, m, where [Formulaomitted], and r is the number of unknown unique sources causing the observed fluctuations. We apply this new analysis on a data set from the Los Alamos National Laboratory site. We demonstrate that the sources identified by NMFk have real physical origins: barometric pressure and water-supply pumping effects. We also estimate the barometric pressure efficiency of the monitoring wells. The possible applications of the NMFk algorithm are not limited to hydrogeology problems; NMFk can be applied to any problem where temporal system behavior is observed at multiple locations and an unknown number of physical sources are causing these fluctuations. Key Points * Transient data by itself can reveal the physical sources causing the transients * Inverse methods can identify the sources of the transients * Blind source separation based on nonnegative matrix factorization is applied JF - Water Resources Research AU - Alexandrov, Boian S AU - Vesselinov, Velimir V AD - Theoretical Division, Physics and Chemistry of Materials Group, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 7332 EP - 7347 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 50 IS - 9 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts; Aqualine Abstracts KW - Aquifers KW - Aquifer KW - Hydrogeology KW - Algorithms KW - Anthropogenic factors KW - Water resources KW - USA, New Mexico, Los Alamos KW - Subsurface flow KW - Water levels KW - Ground water KW - Pumping KW - Pressure KW - Mathematical models KW - Laboratories KW - Water Level KW - Geohydrology KW - Atmospheric pressure KW - Groundwater KW - Monitoring KW - Water resources research KW - Fluctuations KW - M2 556.18:Water Management (556.18) KW - SW 3020:Sources and fate of pollution KW - Q5 08502:Methods and instruments KW - AQ 00005:Underground Services and Water Use UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622604998?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Blind+source+separation+for+groundwater+pressure+analysis+based+on+nonnegative+matrix+factorization&rft.au=Alexandrov%2C+Boian+S%3BVesselinov%2C+Velimir+V&rft.aulast=Alexandrov&rft.aufirst=Boian&rft.date=2014-09-01&rft.volume=50&rft.issue=9&rft.spage=7332&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR015037 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Last updated - 2015-01-21 N1 - SubjectsTermNotLitGenreText - Water levels; Aquifer; Mathematical models; Ground water; Anthropogenic factors; Water resources; Atmospheric pressure; Pumping; Pressure; Aquifers; Hydrogeology; Algorithms; Subsurface flow; Water resources research; Laboratories; Geohydrology; Water Level; Monitoring; Groundwater; Fluctuations; USA, New Mexico, Los Alamos DO - http://dx.doi.org/10.1002/2013WR015037 ER - TY - JOUR T1 - THERMAL MODELING OF HIGH-LEVEL NUCLEAR WASTE DISPOSAL IN A SALT REPOSITORY AN - 1622604449; 20847365 AB - Salt formations have received recent attention for geologic disposal of heat-generating, high-level nuclear waste (HLW). Existing investigations are summarized and expanded upon using analytical and numerical models to investigate simulated temperatures in the salt after emplacement of HLW. Analytical modeling suggests that temperature variations near canisters will be smooth, indicating that the system can be approximated by a coarsely discretized numerical model. Two multidimensional parameter studies explore canister configuration using characteristics from (a) defense HLW and (b) spent nuclear fuel (SNF) waste. Numerical modeling was conducted for a disposal concept consisting of emplacement of waste canisters on the floor of drifts and covering each with salt backfill. Results indicate that waste forms with U.S. Department of Energy (DOE) waste characteristics can be easily configured to maintain simulated temperatures far below 200 degree C at spacings as close as 0.3 m ( similar to 1 ft), the minimum feasible spacing that could practically be achieved. For SNF waste packaged into canisters with heat loads of 1500 or 1000 W with canister spacing of 6 m ( similar to 20 ft) and 3 m ( similar to 10 ft), respectively, simulated temperatures can be maintained below 200 degree C; much higher maximum temperatures would result for designs with higher canister heat loads and smaller spacings. These results indicate that from a thermal loading perspective, in-drift disposal of HLW in salt deposits is feasible for DOE-managed waste as long as the maximum temperature is managed through proper selection of canister heat loads and spacings. The results will aid in the design of potential future field tests to confirm this conclusion. JF - Nuclear Technology AU - Harp, Dylan R AU - Stauffer, Philip H AU - MISHRA, PHOOLENDRA K AU - Levitt, Daniel G AU - Robinson, Bruce A AD - Los Alamos National Laboratory, P.O. Box 1663 MS T003, Los Alamos, New Mexico, dharp@lanl.gov Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 294 EP - 307 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 187 IS - 3 SN - 0029-5450, 0029-5450 KW - Pollution Abstracts KW - salt KW - waste KW - thermal KW - Salts KW - Mathematical models KW - Energy KW - Nuclear fuels KW - Temperature KW - Radioactive wastes KW - Geology KW - Waste disposal KW - P 4000:WASTE MANAGEMENT UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622604449?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Technology&rft.atitle=THERMAL+MODELING+OF+HIGH-LEVEL+NUCLEAR+WASTE+DISPOSAL+IN+A+SALT+REPOSITORY&rft.au=Harp%2C+Dylan+R%3BStauffer%2C+Philip+H%3BMISHRA%2C+PHOOLENDRA+K%3BLevitt%2C+Daniel+G%3BRobinson%2C+Bruce+A&rft.aulast=Harp&rft.aufirst=Dylan&rft.date=2014-09-01&rft.volume=187&rft.issue=3&rft.spage=294&rft.isbn=&rft.btitle=&rft.title=Nuclear+Technology&rft.issn=00295450&rft_id=info:doi/10.13182%2FNfT13-110 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Number of references - 16 N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Salts; Mathematical models; Energy; Nuclear fuels; Radioactive wastes; Temperature; Geology; Waste disposal DO - http://dx.doi.org/10.13182/NfT13-110 ER - TY - JOUR T1 - An asymptotic-preserving semi-Lagrangian algorithm for the time-dependent anisotropic heat transport equation AN - 1562672215; 20585863 AB - We propose a semi-Lagrangian numerical algorithm for a time-dependent, anisotropic temperature transport equation in magnetized plasmas in regimes with negligible variation of the magnitude of the magnetic field B along field lines. The approach is based on a formal integral solution of the parallel (i.e., along the magnetic field) transport equation with sources. While this study focuses on a Braginskii (local) heat flux closure, the approach is able to accommodate nonlocal parallel heat flux closures as well. The numerical implementation is based on an operator-split formulation, with two straightforward steps: a perpendicular transport step (including sources), and a Lagrangian (field-line integral) parallel transport step. Algorithmically, the first step is amenable to the use of modern iterative methods, while the second step has a fixed cost per degree of freedom (and is therefore algorithmically scalable). Accuracy-wise, the approach is free from the numerical pollution introduced by the discrete parallel transport term when the perpendicular to parallel transport coefficient ratio [chi][bottom]/[chi] becomes arbitrarily small, and is shown to capture the correct limiting solution when [isin] = [chi][bottom]L super(2) sub(||)/ sub([chi])L super(2)[bottom] arrow right 0 (with L sub(||), L sub([bottom]) the parallel and perpendicular diffusion length scales, respectively). Therefore, the approach is asymptotic-preserving. We demonstrate the performance of the scheme with several numerical experiments with varying magnetic field complexity in two dimensions, including the case of heat transport across a magnetic island in cylindrical geometry in the presence of a large guide field. JF - Journal of Computational Physics AU - Chacon, L AU - del-Castillo-Negrete, D AU - Hauck, C D AD - Los Alamos National Laboratory, Los Alamos, NM 87545, USA; Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA, chacon@lanl.gov Y1 - 2014/09/01/ PY - 2014 DA - 2014 Sep 01 SP - 719 EP - 746 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 272 SN - 0021-9991, 0021-9991 KW - Pollution Abstracts KW - Asymptotic preserving methods KW - Anisotropic transport KW - Parallel transport KW - Operator-splitting KW - Magnetic fields KW - Islands KW - Pollution dispersion KW - Temperature KW - Diffusion KW - Heat transport KW - P 9999:GENERAL POLLUTION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1562672215?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Computational+Physics&rft.atitle=An+asymptotic-preserving+semi-Lagrangian+algorithm+for+the+time-dependent+anisotropic+heat+transport+equation&rft.au=Chacon%2C+L%3Bdel-Castillo-Negrete%2C+D%3BHauck%2C+C+D&rft.aulast=Chacon&rft.aufirst=L&rft.date=2014-09-01&rft.volume=272&rft.issue=&rft.spage=719&rft.isbn=&rft.btitle=&rft.title=Journal+of+Computational+Physics&rft.issn=00219991&rft_id=info:doi/10.1016%2Fj.jcp.2014.04.049 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 44 N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Magnetic fields; Islands; Pollution dispersion; Temperature; Diffusion; Heat transport DO - http://dx.doi.org/10.1016/j.jcp.2014.04.049 ER - TY - JOUR T1 - Testing the super(14)C ages and conservative behavior of dissolved super(14)C in a carbonate aquifer in Yucca Flat, Nevada (USA), using super(36)Cl from groundwater and packrat middens TT - Determination des ages au super(14)C et test du comportement conservative du super(14)C dissous dans un aquifere carbonate du Yucca Flat, Nevada (Etats Unis d'Amerique) a partir du super(36)Cl des eaux souterraines et des amas fossiles de debris laisses par des rats. AN - 1560138668; 20621317 AB - Corrected groundwater super(14)C ages from the carbonate aquifer in Yucca Flat at the former Nevada Test Site (now the Nevada National Security Site), USA, were evaluated by comparing temporal variations of groundwater super(36)Cl/Cl estimated with these super(14)C ages with published records of meteoric super(36)Cl/Cl variations preserved in packrat middens (piles of plant fragments, fecal matter and urine). Good agreement between these records indicates that the groundwater super(14)C ages are reasonable and that super(14)C is moving with chloride without sorbing to the carbonate rock matrix or fracture coatings, despite opposing evidence from laboratory experiments. The groundwater super(14)C ages are consistent with other hydrologic evidence that indicates significant basin infiltration ceased 8,000 to 10,000 years ago, and that recharge to the carbonate aquifer is from paleowater draining through overlying tuff confining units along major faults. This interpretation is supported by the relative age differences as well as hydraulic head differences between the alluvial and volcanic aquifers and the carbonate aquifer. The carbonate aquifer super(14)C ages suggest that groundwater velocities throughout much of Yucca Flat are about 2 m/yr, consistent with the long-held conceptual model that blocking ridges of low-permeability rock hydrologically isolate the carbonate aquifer in Yucca Flat from the outlying regional carbonate flow system.Original Abstract: Les ages corriges des eaux souterraines au super(14)C d'un aquifere carbonate du Yucca Flat sur l'ancien site test du Nevada (actuellement le site national de la securite du Nevada), Etats Unis d'Amerique, ont ete evalues en comparant les variations temporelles des rapports estimes de super(36)Cl/Cl des eaux souterraines avec celles des ages au super(14)C avec les donnees publiees dans les enregistrements meteoriques des variations de super(36)Cl/Cl preservees dans les amas fossiles de debris laisses par des rats (amas de fragments de plantes, de matiere fecale et d'urine). Un bon accord entre ces enregistrements indique que l'age des eaux souterraines au super(14)C est raisonnable et que le super(14)C se deplace avec les chlorures sans sorption sur la matrice carbonatee de la roche ou sur les mineralisations carbonatees des fractures, malgre des resultats opposes sur des experimentations en laboratoire. Les ages des eaux souterraines au super(14)C sont compatibles avec les autres evidences hydrologiques qui indiquent que l'importante infiltration du bassin a cesse il y a entre 8,000 et 10,000 ans et que la recharge de l'aquifere carbonate est issue d'un drainage d'eaux anciennes au travers de formations peu permeables de tuf le long des principales failles. Cette interpretation est etayee par les differents ages relatifs ainsi que par les differences de charge hydraulique entre les aquiferes alluviaux et volcaniques et l'aquifere carbonate. Les ages au super(14)C de l'aquifere carbonate suggerent que les vitesses des eaux souterraines dans une grande partie du Yucca Flat sont environ de 2m/an, ce qui est compatible avec le modele conceptuel de longue date, qui stipule que les secteurs de faible permeabilite isolent du point de vue hydrogeologique l'aquifere carbonate du Yucca Flat du systeme d'ecoulement regional peripherique au sein des carbonates. JF - Hydrogeology Journal AU - Kwicklis, Edward AU - Farnham, Irene AD - Los Alamos National Laboratory, P. O. Box 1163, Drop Pt. 19U, MS T003, Los Alamos, NM, 87545, USA, kwicklis@lanl.gov Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 1359 EP - 1381 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 22 IS - 6 SN - 1431-2174, 1431-2174 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Aquifers KW - Hydraulics KW - Aquifer KW - Carbonate rocks KW - Hydrogeology KW - Chlorides KW - Groundwater Basins KW - USA, Nevada KW - Paleoclimates KW - Hydrologic Models KW - Meteor research KW - Volcanic activity KW - Aquifer flow KW - Groundwater velocity KW - Laboratory experiments KW - Radiometric dating KW - Geologic Fractures KW - Temporal variations KW - Carbonates KW - Groundwater flow KW - Carbon 14 KW - Fractures KW - Age determination KW - Aquifer recharge KW - Urine KW - Aquifer Testing KW - Infiltration KW - Groundwater KW - Q2 09148:Palaeo-studies KW - AQ 00006:Sewage KW - SW 0845:Water in soils KW - M2 556.14:Infiltration/Soil Moisture (556.14) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560138668?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=Testing+the+super%2814%29C+ages+and+conservative+behavior+of+dissolved+super%2814%29C+in+a+carbonate+aquifer+in+Yucca+Flat%2C+Nevada+%28USA%29%2C+using+super%2836%29Cl+from+groundwater+and+packrat+middens&rft.au=Kwicklis%2C+Edward%3BFarnham%2C+Irene&rft.aulast=Kwicklis&rft.aufirst=Edward&rft.date=2014-09-01&rft.volume=22&rft.issue=6&rft.spage=1359&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-014-1131-3 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 56 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Carbonate rocks; Aquifer; Temporal variations; Urine; Carbonates; Fractures; Carbon 14; Age determination; Radiometric dating; Aquifers; Aquifer recharge; Volcanic activity; Meteor research; Hydrogeology; Groundwater flow; Infiltration; Aquifer flow; Laboratory experiments; Groundwater velocity; Paleoclimates; Hydraulics; Geologic Fractures; Hydrologic Models; Chlorides; Aquifer Testing; Groundwater Basins; Groundwater; USA, Nevada DO - http://dx.doi.org/10.1007/s10040-014-1131-3 ER - TY - JOUR T1 - A symmetry preserving dissipative artificial viscosity in r-z geometry AN - 1560104880; 20554191 AB - We present a novel artificial viscosity for staggered Lagrangian schemes in 2D axi-symmetric r-z geometry on logically rectangular grids. The suggested viscous force is dissipative by construction, conserves both components of momentum, and preserves spherical symmetry on an equiangular polar grid. This method turns out to be robust and performs well for spherically symmetric problems on various grid types (symmetric, perturbed polar, rectangular), without any need for tinkering with problem-dependent or grid-dependent parameters. The results are compared with the outcome of the area-weighted approach using the popular tensor viscosity by Campbell and Shashkov. Copyright copyright 2014 John Wiley & Sons, Ltd. We present a new artificial viscosity for staggered Lagrangian schemes in 2D-r-z geometry. The suggested viscous force is dissipative by construction, conserves both components of momentum, and preserves spherical symmetry on an equi-angular polar grid. This method turns out to be robust and performs well for spherically symmetric problems on various grid types, with no need for tinkering with problem-dependent or grid-dependent parameters. JF - International Journal for Numerical Methods in Fluids AU - Vachal, Pavel AU - Wendroff, Burton AD - Theoretical Division, Group T-5, Los Alamos National Laboratory, MS B284, Los Alamos, NM, 87545, USA. Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 185 EP - 198 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 76 IS - 3 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Viscosity KW - Construction KW - Fluid dynamics KW - AQ 00001:Water Resources and Supplies KW - Q2 09169:Fluid mechanics KW - SW 6010:Structures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560104880?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=A+symmetry+preserving+dissipative+artificial+viscosity+in+r-z+geometry&rft.au=Vachal%2C+Pavel%3BWendroff%2C+Burton&rft.aulast=Vachal&rft.aufirst=Pavel&rft.date=2014-09-01&rft.volume=76&rft.issue=3&rft.spage=185&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.3926 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Fluid dynamics; Viscosity; Construction DO - http://dx.doi.org/10.1002/fld.3926 ER - TY - JOUR T1 - A nodal Godunov method for Lagrangian shock hydrodynamics on unstructured tetrahedral grids AN - 1560104268; 20554193 AB - We present a nodal Godunov method for Lagrangian shock hydrodynamics. The method is designed to operate on three-dimensional unstructured grids composed of tetrahedral cells. A node-centered finite element formulation avoids mesh stiffness, and an approximate Riemann solver in the fluid reference frame ensures a stable, upwind formulation. This choice leads to a non-zero mass flux between control volumes, even though the mesh moves at the fluid velocity, but eliminates volume errors that arise due to the difference between the fluid velocity and the contact wave speed. A monotone piecewise linear reconstruction of primitive variables is used to compute interface unknowns and recover second-order accuracy. The scheme has been tested on a variety of standard test problems and exhibits first-order accuracy on shock problems and second-order accuracy on smooth flows using meshes of up to O(10 super(6)) tetrahedra. Copyright copyright 2014 John Wiley & Sons, Ltd. We present a nodal Godunov method for Lagrangian shock hydrodynamics. The new method computes reliable solutions on tetrahedral cells for a number of standard test problems. The method also overcomes volume errors that are present in traditional Lagrangian schemes. JF - International Journal for Numerical Methods in Fluids AU - Waltz, J AU - Morgan, N R AU - Canfield, T R AU - Charest, MRJ AU - Wohlbier, J G AD - Department of Computational Physics Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 129 EP - 146 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 76 IS - 3 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Testing Procedures KW - Hydrodynamics KW - Interfaces KW - Velocity KW - Errors KW - Methodology KW - Finite Element Method KW - Fluid dynamics KW - Standards KW - Waves KW - Fluctuations KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - Q2 09162:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560104268?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=A+nodal+Godunov+method+for+Lagrangian+shock+hydrodynamics+on+unstructured+tetrahedral+grids&rft.au=Waltz%2C+J%3BMorgan%2C+N+R%3BCanfield%2C+T+R%3BCharest%2C+MRJ%3BWohlbier%2C+J+G&rft.aulast=Waltz&rft.aufirst=J&rft.date=2014-09-01&rft.volume=76&rft.issue=3&rft.spage=129&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.3928 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Hydrodynamics; Fluid dynamics; Methodology; Testing Procedures; Interfaces; Finite Element Method; Velocity; Waves; Standards; Errors; Fluctuations DO - http://dx.doi.org/10.1002/fld.3928 ER - TY - JOUR T1 - High manganese concentrations in rocks at Gale Crater, Mars AN - 1696875304; 2015-068941 AB - The surface of Mars has long been considered a relatively oxidizing environment, an idea supported by the abundance of ferric iron phases observed there. However, compared to iron, manganese is sensitive only to high redox potential oxidants, and when concentrated in rocks, it provides a more specific redox indicator of aqueous environments. Observations from the ChemCam instrument on the Curiosity rover indicate abundances of manganese in and on some rock targets that are 1-2 orders of magnitude higher than previously observed on Mars, suggesting the presence of an as-yet unidentified manganese-rich phase. These results show that the Martian surface has at some point in time hosted much more highly oxidizing conditions than has previously been recognized. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Lanza, Nina L AU - Fischer, Woodward W AU - Wiens, Roger C AU - Grotzinger, John AU - Ollila, Ann M AU - Cousin, Agnes AU - Anderson, Ryan B AU - Clark, Benton C AU - Gellert, Ralf AU - Mangold, Nicolas AU - Maurice, Sylvestre AU - Le Mouelic, Stephane AU - Nachon, Marion AU - Schmidt, Mariek AU - Berger, Jeffrey AU - Clegg, Samuel M AU - Forni, Olivier AU - Hardgrove, Craig AU - Melikechi, Noureddine AU - Newsom, Horton E AU - Sautter, Violaine Y1 - 2014/08/28/ PY - 2014 DA - 2014 Aug 28 SP - 5755 EP - 5763 PB - American Geophysical Union, Washington, DC VL - 41 IS - 16 SN - 0094-8276, 0094-8276 KW - impact features KW - oxidation KW - Mars KW - manganese KW - iron KW - Gale Crater KW - terrestrial planets KW - Mars Exploration Rover KW - planets KW - ferric iron KW - metals KW - Curiosity Rover KW - surface features KW - impact craters KW - chemical composition KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875304?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=High+manganese+concentrations+in+rocks+at+Gale+Crater%2C+Mars&rft.au=Lanza%2C+Nina+L%3BFischer%2C+Woodward+W%3BWiens%2C+Roger+C%3BGrotzinger%2C+John%3BOllila%2C+Ann+M%3BCousin%2C+Agnes%3BAnderson%2C+Ryan+B%3BClark%2C+Benton+C%3BGellert%2C+Ralf%3BMangold%2C+Nicolas%3BMaurice%2C+Sylvestre%3BLe+Mouelic%2C+Stephane%3BNachon%2C+Marion%3BSchmidt%2C+Mariek%3BBerger%2C+Jeffrey%3BClegg%2C+Samuel+M%3BForni%2C+Olivier%3BHardgrove%2C+Craig%3BMelikechi%2C+Noureddine%3BNewsom%2C+Horton+E%3BSautter%2C+Violaine&rft.aulast=Lanza&rft.aufirst=Nina&rft.date=2014-08-28&rft.volume=41&rft.issue=16&rft.spage=5755&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL060329 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 22 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-07-17 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - chemical composition; Curiosity Rover; ferric iron; Gale Crater; impact craters; impact features; iron; manganese; Mars; Mars Exploration Rover; metals; oxidation; planets; surface features; terrestrial planets DO - http://dx.doi.org/10.1002/2014GL060329 ER - TY - JOUR T1 - SIMS measurements of intrashell delta (super 13) C in the cultured planktic foraminifer Orbulina universa AN - 1560084053; 2014-069283 AB - In this study, we present experimental results from the planktic foraminifer Orbulina universa, cultured in the laboratory. We demonstrate that the delta (super 13) C of shell calcite precipitated in (super 13) C-labeled seawater for 24 h can be resolved and accurately measured using Secondary Ion Mass Spectrometry (SIMS). Specimens maintained at 20 degrees C were transferred from ambient seawater (delta (super 13) C (sub DIC) = +1.3 ppm) into seawater with delta (super 13) C (sub DIC) = +51.5 ppm and enriched [Ba (super 2+) ] for 24 h. Specimens were then transferred into ambient seawater with elevated [ (super 87) Sr] for 6-9 h of calcification, followed by a transfer back into unlabeled ambient seawater until gametogenesis. This technique produced O. universa shells with calcite layers of distinct geochemical signatures. We quantify the spatial positions of trace element labels in the shells using laser ablation ICP-MS depth profiling. Using fragments from the same shells, we quantify intrashell delta (super 13) C (sub calcite) using SIMS with a 6 or 8 mu m spot (2 SD range + or -0.5 ppm to 1.7 ppm). Measured delta (super 13) C (sub calcite) values in O. universa shell layers precipitated in ambient seawater are within 2 ppm of predicted delta (super 13) C (sub calcite) values. In (super 13) C-labeled bands of calcite, 6 mu m SIMS spot measurements are within 2 ppm of predicted delta (super 13) C (sub calcite) values, whereas 8 mu m SIMS spots yield intermediate, mixed values. The spatial agreement between trace element and carbon isotope data suggests that (super 13) C and cation tracers are synchronously incorporated into shell calcite. These results demonstrate the ability of SIMS delta (super 13) C measurements to resolve approximately 10 mu m features in foraminifer shell calcite using a 6 mu m spot, and highlight the potential of this technique for addressing questions about ecology, biomineralization, and paleoceanography. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Vetter, Lael AU - Kozdon, Reinhard AU - Valley, John W AU - Mora, Claudia I AU - Spero, Howard J Y1 - 2014/08/15/ PY - 2014 DA - 2014 Aug 15 SP - 527 EP - 539 PB - Elsevier, New York, NY VL - 139 SN - 0016-7037, 0016-7037 KW - United States KW - San Pedro Basin KW - sea water KW - Northeast Pacific KW - ion probe data KW - isotopes KW - mass spectra KW - Orbulina KW - Orbulina universa KW - stable isotopes KW - Globigerinacea KW - Foraminifera KW - California KW - carbon KW - Globigerinidae KW - Invertebrata KW - spectra KW - East Pacific KW - shells KW - Protista KW - isotope ratios KW - C-13/C-12 KW - Santa Catalina Island KW - Rotaliina KW - planktonic taxa KW - Southern California Bight KW - ICP mass spectra KW - Southern California KW - North Pacific KW - Pacific Ocean KW - microfossils KW - 02D:Isotope geochemistry KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560084053?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=SIMS+measurements+of+intrashell+delta+%28super+13%29+C+in+the+cultured+planktic+foraminifer+Orbulina+universa&rft.au=Vetter%2C+Lael%3BKozdon%2C+Reinhard%3BValley%2C+John+W%3BMora%2C+Claudia+I%3BSpero%2C+Howard+J&rft.aulast=Vetter&rft.aufirst=Lael&rft.date=2014-08-15&rft.volume=139&rft.issue=&rft.spage=527&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.04.049 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 68 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-09-05 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - C-13/C-12; California; carbon; East Pacific; Foraminifera; Globigerinacea; Globigerinidae; ICP mass spectra; Invertebrata; ion probe data; isotope ratios; isotopes; mass spectra; microfossils; North Pacific; Northeast Pacific; Orbulina; Orbulina universa; Pacific Ocean; planktonic taxa; Protista; Rotaliina; San Pedro Basin; Santa Catalina Island; sea water; shells; Southern California; Southern California Bight; spectra; stable isotopes; United States DO - http://dx.doi.org/10.1016/j.gca.2014.04.049 ER - TY - CPAPER T1 - A multiple species synthesis of tree mortality physiology - how prevalent are hydraulic failure and carbohydrate depletion? T2 - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AN - 1645188601; 6321056 JF - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AU - Adams, Henry Y1 - 2014/08/10/ PY - 2014 DA - 2014 Aug 10 KW - Hydraulics KW - Mortality KW - Trees KW - Physiology KW - Carbohydrates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645188601?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=99th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2014%29&rft.atitle=A+multiple+species+synthesis+of+tree+mortality+physiology+-+how+prevalent+are+hydraulic+failure+and+carbohydrate+depletion%3F&rft.au=Adams%2C+Henry&rft.aulast=Adams&rft.aufirst=Henry&rft.date=2014-08-10&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=99th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://eco.confex.com/eco/2014/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Effects of precipitation and temperature manipulations on carbohydrate and mortality dynamics in pinon-juniper woodlands T2 - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AN - 1645184730; 6321053 JF - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AU - Dickman, L AU - McDowell, Nate AU - Sevanto, Sanna AU - Pockman, William Y1 - 2014/08/10/ PY - 2014 DA - 2014 Aug 10 KW - Temperature effects KW - Mortality KW - Precipitation KW - Carbohydrates KW - Abiotic factors UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645184730?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=99th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2014%29&rft.atitle=Effects+of+precipitation+and+temperature+manipulations+on+carbohydrate+and+mortality+dynamics+in+pinon-juniper+woodlands&rft.au=Dickman%2C+L%3BMcDowell%2C+Nate%3BSevanto%2C+Sanna%3BPockman%2C+William&rft.aulast=Dickman&rft.aufirst=L&rft.date=2014-08-10&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=99th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://eco.confex.com/eco/2014/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Phloem and drought T2 - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AN - 1645182480; 6321596 JF - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AU - Sevanto, Sanna AU - Dickman, L AU - McDowell, Nate AU - Pockman, William Y1 - 2014/08/10/ PY - 2014 DA - 2014 Aug 10 KW - Phloem KW - Droughts UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645182480?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=99th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2014%29&rft.atitle=Phloem+and+drought&rft.au=Sevanto%2C+Sanna%3BDickman%2C+L%3BMcDowell%2C+Nate%3BPockman%2C+William&rft.aulast=Sevanto&rft.aufirst=Sanna&rft.date=2014-08-10&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=99th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://eco.confex.com/eco/2014/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Contrasting patterns of activity in fungal and bacterial communities along a natural environmental gradient T2 - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AN - 1645180428; 6319547 JF - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AU - Mueller, Rebecca AU - Gallegos-Graves, Laverne AU - Zak, Donald AU - Kuske, Cheryl Y1 - 2014/08/10/ PY - 2014 DA - 2014 Aug 10 KW - Ecology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645180428?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=99th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2014%29&rft.atitle=Contrasting+patterns+of+activity+in+fungal+and+bacterial+communities+along+a+natural+environmental+gradient&rft.au=Mueller%2C+Rebecca%3BGallegos-Graves%2C+Laverne%3BZak%2C+Donald%3BKuske%2C+Cheryl&rft.aulast=Mueller&rft.aufirst=Rebecca&rft.date=2014-08-10&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=99th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://eco.confex.com/eco/2014/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - JOUR T1 - Morphological and Performance Measures of Polyurethane Foams Using X-Ray CT and Mechanical Testing AN - 1846412844; PQ0003866178 AB - Meso-scale structure in polymeric foams determines the mechanical properties of the material. Density variations, even more than variations in the anisotropic void structure, can greatly vary the compressive and tensile response of the material. With their diverse use as both a structural material and space filler, polyurethane (PU) foams are widely studied. In this manuscript, quantitative measures of the density and anisotropic structure are provided by using micro X-ray computed tomography (microCT) to better understand the results of mechanical testing. MicroCT illustrates the variation in the density, cell morphology, size, shape, and orientation in different regions in blown foam due to the velocity profile near the casting surface. "Interrupted" in situ imaging of the material during compression of these sub-regions indicates the pathways of the structural response to the mechanical load and the changes in cell morphology as a result. It is found that molded PU foam has a 6 mm thick "skin" of higher density and highly eccentric morphological structure that leads to wide variations in mechanical performance depending upon sampling location. This comparison is necessary to understand the mechanical performance of the anisotropic structure. JF - Microscopy and Microanalysis AU - Patterson, Brian M AU - Henderson, Kevin AU - Gilbertson, Robert D AU - Tornga, Stephanie AU - Cordes, Nikolaus L AU - Chavez, Manuel E AU - Smith, Zachary AD - Los Alamos National Laboratory, Polymers and Coating Group, Materials Science and Technology Division, P.O. Box 1663, MS E549, Los Alamos, NM 87545, USA, bpatterson@lanl.gov Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 1284 EP - 1293 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 20 IS - 4 SN - 1431-9276, 1431-9276 KW - Biotechnology and Bioengineering Abstracts KW - Anisotropy KW - Skin KW - Ionizing radiation KW - Computed tomography KW - polyurethane KW - Cell size KW - Cytology KW - Foams KW - Sampling KW - Mechanical properties KW - Compression KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846412844?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Microscopy+and+Microanalysis&rft.atitle=Morphological+and+Performance+Measures+of+Polyurethane+Foams+Using+X-Ray+CT+and+Mechanical+Testing&rft.au=Patterson%2C+Brian+M%3BHenderson%2C+Kevin%3BGilbertson%2C+Robert+D%3BTornga%2C+Stephanie%3BCordes%2C+Nikolaus+L%3BChavez%2C+Manuel+E%3BSmith%2C+Zachary&rft.aulast=Patterson&rft.aufirst=Brian&rft.date=2014-08-01&rft.volume=20&rft.issue=4&rft.spage=1284&rft.isbn=&rft.btitle=&rft.title=Microscopy+and+Microanalysis&rft.issn=14319276&rft_id=info:doi/10.1017%2FS1431927614000993 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Number of references - 26 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Skin; Anisotropy; Ionizing radiation; Cell size; polyurethane; Computed tomography; Cytology; Sampling; Foams; Compression; Mechanical properties DO - http://dx.doi.org/10.1017/S1431927614000993 ER - TY - JOUR T1 - Northern Hemisphere glacier and ice cap surface mass balance and contribution to sea level rise AN - 1700097051; 2015-071612 AB - Mass changes and mass contribution to sea level rise from glaciers and ice caps (GIC) are key components of the earth's changing sea level. GIC surface mass balance (SMB) magnitudes and individual and regional mean conditions and trends (1979-2009) were simulated for all GIC having areas greater or equal to 0.5 km (super 2) in the Northern Hemisphere north of 25 degrees N latitude (excluding the Greenland Ice Sheet). Recent datasets, including the Randolph Glacier Inventory (RGI; v. 2.0), the NOAA Global Land One-km Base Elevation Project (GLOBE), and the NASA Modern-Era Retrospective Analysis for Research and Applications (MERRA) products, together with recent SnowModel developments, allowed relatively high-resolution (1-km horizontal grid; 3-h time step) simulations of GIC surface air temperature, precipitation, sublimation, evaporation, surface runoff, and SMB. Simulated SMB outputs were calibrated against 1422 direct glaciological annual SMB observations of 78 GIC. The overall GIC mean annual and mean summer air temperature, runoff, and SMB loss increased during the simulation period. The cumulative GIC SMB was negative for all regions. The SMB contribution to sea level rise was largest from Alaska and smallest from the Caucasus. On average, the contribution to sea level rise was 0.51 + or - 0.16 mm sea level equivalent (SLE) yr (super -1) for 1979-2009 and approximately 40% higher 0.71 + or - 0.15 mm SLE yr (super -1) for the last decade, 1999-2009. JF - Journal of Climate AU - Mernild, Sebastian H AU - Liston, Glen E AU - Hiemstra (CREEL), Christopher A Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 6051 EP - 6073 PB - American Meteorological Society, Boston, MA VL - 27 IS - 15 SN - 0894-8755, 0894-8755 KW - annual variations KW - glaciers KW - ice sheets KW - deglaciation KW - climate change KW - ice caps KW - sublimation KW - sea-level changes KW - evaporation KW - mass balance KW - climate effects KW - Northern Hemisphere KW - seasonal variations KW - glacial geology KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700097051?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Climate&rft.atitle=Northern+Hemisphere+glacier+and+ice+cap+surface+mass+balance+and+contribution+to+sea+level+rise&rft.au=Mernild%2C+Sebastian+H%3BListon%2C+Glen+E%3BHiemstra+%28CREEL%29%2C+Christopher+A&rft.aulast=Mernild&rft.aufirst=Sebastian&rft.date=2014-08-01&rft.volume=27&rft.issue=15&rft.spage=6051&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-13-00669.1 L2 - http://journals.ametsoc.org/loi/clim LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from American Meteorological Society, Boston, MA, United States N1 - Date revised - 2015-01-01 N1 - PubXState - MA N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2015-07-30 N1 - SubjectsTermNotLitGenreText - annual variations; climate change; climate effects; deglaciation; evaporation; glacial geology; glaciers; ice caps; ice sheets; mass balance; Northern Hemisphere; sea-level changes; seasonal variations; sublimation DO - http://dx.doi.org/10.1175/JCLI-D-13-00669.1 ER - TY - JOUR T1 - Bentonite evolution at elevated pressures and temperatures; an experimental study for generic nuclear repository designs AN - 1637542371; 2014-104711 AB - Geologic disposal of spent nuclear fuel in high-capacity metal canisters may reduce the repository footprint, but it may yield high-thermal loads (up to 300 degrees C). The focus of this experimental work is to expand our understanding of the hydrothermal stability of bentonite clay barriers interacting with metallic phases under different geochemical, mineralogical, and engineering conditions. The hydrothermal experiments were performed using flexible Au/Ti Dickson reaction cells mounted in an externally heated pressure vessel at 150-160 bars and temperatures up to 300 degrees C for five to six weeks. Unprocessed Wyoming bentonite, containing primarily montmorillonite with minor amount of clinoptilolite, was saturated with a K-Ca-Na-Cl-bearing water (approximately 1900 mg/L total dissolved solids) at a 9:1 water:rock mass ratio. The bentonite and solution combination contained either steel plates or Cu-foils and were buffered to low Eh using magnetite and metallic iron. During reactions, pH, K (super +) , and Ca (super 2+) concentrations decreased, whereas SiO (sub 2(aq)) , Na (super +) , and SO (sub 4) (super 2-) concentrations increased throughout the experiments. Pyrite decomposition was first observed at approximately 210 degrees C, generating H (sub 2) S (sub (aq,g)) that interacted with metal plates or evolves as a gas. The aqueous concentrations of alkali and alkaline earth cations appear to be buffered via montmorillonite and clinoptilolite exchange reactions. Illite or illite/smectite mixed-layer formation was significantly retarded in the closed system due to a limited K (super +) supply along with high Na (super +) and SiO (sub 2(aq)) concentrations. Precursor clinoptilolite underwent extensive recrystallization during the six weeks, 300 degrees C experiments producing a Si-rich analcime in addition to authigenic silica phases (i.e., opal, cristobalite). Analcime and feldspar formation partially sequester aqueous Al (super 3+) , thereby potentially inhibiting illitization. Associated with the zeolite alteration is a approximately 17% volume decrease (quartz formation) that translates into approximately 2% volume loss in the bulk bentonite. These results provide chemical information that can be utilized in extending the bentonite barriers" lifetime and thermal stability. Zeolite alteration mineralogy and illitization retardation under these experimental conditions is important for the evaluation of clay barrier long-term stability in a spent nuclear fuel repository. JF - American Mineralogist AU - Cheshire, Michael C AU - Caporuscio, Florie A AU - Rearick, Michael S AU - Jove-Colon, Carlos AU - McCarney, Mary Kate Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 1662 EP - 1675 PB - Mineralogical Society of America, Washington, DC VL - 99 IS - 8-9 SN - 0003-004X, 0003-004X KW - United States KW - silicates KW - X-ray diffraction data KW - engineering properties KW - stability KW - recrystallization KW - metasomatism KW - temperature KW - radioactive waste KW - sedimentary rocks KW - chemical reactions KW - clinoptilolite KW - zeolite group KW - hydrothermal alteration KW - framework silicates KW - Eh KW - disposal barriers KW - montmorillonite KW - experimental studies KW - pressure KW - bentonite KW - smectite KW - hydrogen sulfide KW - electron microscopy data KW - illite KW - high pressure KW - clay minerals KW - Wyoming KW - sheet silicates KW - pyrite KW - analcime KW - waste disposal KW - reactive barriers KW - sulfides KW - clastic rocks KW - underground disposal KW - high temperature KW - design KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542371?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Mineralogist&rft.atitle=Bentonite+evolution+at+elevated+pressures+and+temperatures%3B+an+experimental+study+for+generic+nuclear+repository+designs&rft.au=Cheshire%2C+Michael+C%3BCaporuscio%2C+Florie+A%3BRearick%2C+Michael+S%3BJove-Colon%2C+Carlos%3BMcCarney%2C+Mary+Kate&rft.aulast=Cheshire&rft.aufirst=Michael&rft.date=2014-08-01&rft.volume=99&rft.issue=8-9&rft.spage=1662&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam.2014.4673 L2 - http://www.minsocam.org/MSA/AmMin/TOC/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 75 N1 - PubXState - DC N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2014-12-18 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - analcime; bentonite; chemical reactions; clastic rocks; clay minerals; clinoptilolite; design; disposal barriers; Eh; electron microscopy data; engineering properties; experimental studies; framework silicates; high pressure; high temperature; hydrogen sulfide; hydrothermal alteration; illite; metasomatism; montmorillonite; pressure; pyrite; radioactive waste; reactive barriers; recrystallization; sedimentary rocks; sheet silicates; silicates; smectite; stability; sulfides; temperature; underground disposal; United States; waste disposal; Wyoming; X-ray diffraction data; zeolite group DO - http://dx.doi.org/10.2138/am.2014.4673 ER - TY - JOUR T1 - Silk/molecular conductor bilayer thin-films: properties and sensing functions AN - 1620092865; 20509906 AB - Since their discovery, organic conductors have attracted fundamental and device physics interest due to their diverse physical properties. However, conventional electrochemical growth methods produce millimeter-sized crystals that do not translate to the fabrication of large-scale thin-film devices. Of late a chemical-vapor annealing method has been proved to be capable of growing a conductive polycrystalline layer of (BEDT-TTF) sub(2)I sub(3) molecular conductor on the surface of soluble polycarbonate (PC) thin films in a bilayer configuration. (Here BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene.) This has resulted in efficient piezoresistive organic molecular sensors. Conversely, solubility and other incompatibilities limit the direct application of the crystallite growth method to other substrates with arbitrary shape and composition. Here we report methods to circumvent these limitations. Specifically, we demonstrate the transfer of the active layer of a PC/(BEDT-TTF) sub(2)I sub(3) bilayer film from the non-porous parent PC substrate to porous and humidity-dependent Bombyx morisilk target substrates. SEM analysis, temperature dependent resistance, and electromechanical measurements show no significant damage to the transferred (BEDT-TTF) sub(2)I sub(3) layer. The silk/(BEDT-TTF) sub(2)I sub(3) bilayer films exhibit additional functions that can be used for humidity sensing, electric current-driven actuators, and strain detection. Of particular significance is the piezoresistive function of the porous silk bilayer structure that allows the investigation of multi-stage diffusion processes. JF - Materials Horizons AU - Steven, Eden AU - Lebedev, Victor AU - Laukhina, Elena AU - Rovira, Concepcio AU - Laukhin, Vladimir AU - Brooks, James S AU - Veciana, Jaume AD - Department of Physics; National High Magnetic Field Laboratory Florida State University; 1800 East Paul Dirac Drive; Tallahassee; Florida 32310; USA; , esteven@magnet.fsu.edu PY - 2014 SP - 522 EP - 528 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 1 IS - 5 SN - 2051-6347, 2051-6347 KW - Biotechnology and Bioengineering Abstracts KW - Temperature effects KW - Silk KW - Solubility KW - Humidity KW - Diffusion KW - Conductors KW - Crystals KW - polycarbonate KW - Films KW - W 30955:Biosensors UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1620092865?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Materials+Horizons&rft.atitle=Silk%2Fmolecular+conductor+bilayer+thin-films%3A+properties+and+sensing+functions&rft.au=Steven%2C+Eden%3BLebedev%2C+Victor%3BLaukhina%2C+Elena%3BRovira%2C+Concepcio%3BLaukhin%2C+Vladimir%3BBrooks%2C+James+S%3BVeciana%2C+Jaume&rft.aulast=Steven&rft.aufirst=Eden&rft.date=2014-08-01&rft.volume=1&rft.issue=5&rft.spage=522&rft.isbn=&rft.btitle=&rft.title=Materials+Horizons&rft.issn=20516347&rft_id=info:doi/10.1039%2Fc4mh00074a LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Number of references - 28 N1 - Last updated - 2015-12-09 N1 - SubjectsTermNotLitGenreText - Temperature effects; Silk; Solubility; Humidity; Diffusion; Crystals; Conductors; polycarbonate; Films DO - http://dx.doi.org/10.1039/c4mh00074a ER - TY - JOUR T1 - Extrapolating active layer thickness measurements across Arctic polygonal terrain using LiDAR and NDVI data sets AN - 1566859358; 20749396 AB - Landscape attributes that vary with microtopography, such as active layer thickness (ALT), are labor intensive and difficult to document effectively through in situ methods at kilometer spatial extents, thus rendering remotely sensed methods desirable. Spatially explicit estimates of ALT can provide critically needed data for parameterization, initialization, and evaluation of Arctic terrestrial models. In this work, we demonstrate a new approach using high-resolution remotely sensed data for estimating centimeter-scale ALT in a 5 km super(2) area of ice-wedge polygon terrain in Barrow, Alaska. We use a simple regression-based, machine learning data-fusion algorithm that uses topographic and spectral metrics derived from multisensor data (LiDAR and WorldView-2) to estimate ALT (2 m spatial resolution) across the study area. Comparison of the ALT estimates with ground-based measurements, indicates the accuracy (r super(2)=0.76, RMSE plus or minus 4.4 cm) of the approach. While it is generally accepted that broad climatic variability associated with increasing air temperature will govern the regional averages of ALT, consistent with prior studies, our findings using high-resolution LiDAR and WorldView-2 data, show that smaller-scale variability in ALT is controlled by local eco-hydro-geomorphic factors. This work demonstrates a path forward for mapping ALT at high spatial resolution and across sufficiently large regions for improved understanding and predictions of coupled dynamics among permafrost, hydrology, and land-surface processes from readily available remote sensing data. Key Points * First effort to map the ALT using fine resolution remotely sensed data * A blended methodology incorporating RS data and statistical manipulation * Smaller-scale ALT is controlled by eco-hydro-geo variables JF - Water Resources Research AU - Gangodagamage, Chandana AU - Rowland, Joel C AU - Hubbard, Susan S AU - Brumby, Steven P AU - Liljedahl, Anna K AU - Wainwright, Haruko AU - Wilson, Cathy J AU - Altmann, Garrett L AU - Dafflon, Baptiste AU - Peterson, John AU - Ulrich, Craig AU - Tweedie, Craig E AU - Wullschleger, Stan D AD - Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 6339 EP - 6357 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 50 IS - 8 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts; Aqualine Abstracts KW - Prediction KW - Remote Sensing KW - Variability KW - Active layer KW - Climate change KW - Algorithms KW - Statistical analysis KW - Remote sensing KW - Water resources KW - Permafrost KW - Air temperature KW - Evaluation KW - Hydrologic Models KW - Climatic variability KW - Regression analysis KW - USA, Alaska, Barrow KW - Mapping KW - Arctic KW - Hydrologic Data KW - Topography KW - Mathematical models KW - PN, Arctic KW - Lidar applications KW - Permafrost hydrology KW - Water resources research KW - LIDAR KW - SW 5040:Data acquisition KW - AQ 00006:Sewage KW - M2 556.18:Water Management (556.18) KW - Q5 08502:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566859358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Extrapolating+active+layer+thickness+measurements+across+Arctic+polygonal+terrain+using+LiDAR+and+NDVI+data+sets&rft.au=Gangodagamage%2C+Chandana%3BRowland%2C+Joel+C%3BHubbard%2C+Susan+S%3BBrumby%2C+Steven+P%3BLiljedahl%2C+Anna+K%3BWainwright%2C+Haruko%3BWilson%2C+Cathy+J%3BAltmann%2C+Garrett+L%3BDafflon%2C+Baptiste%3BPeterson%2C+John%3BUlrich%2C+Craig%3BTweedie%2C+Craig+E%3BWullschleger%2C+Stan+D&rft.aulast=Gangodagamage&rft.aufirst=Chandana&rft.date=2014-08-01&rft.volume=50&rft.issue=8&rft.spage=6339&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR014283 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Mathematical models; Climate change; Regression analysis; Remote sensing; Permafrost; Water resources; Mapping; LIDAR; Air temperature; Climatic variability; Active layer; Permafrost hydrology; Lidar applications; Statistical analysis; Algorithms; Water resources research; Topography; Remote Sensing; Evaluation; Prediction; Variability; Hydrologic Models; Hydrologic Data; Arctic; PN, Arctic; USA, Alaska, Barrow DO - http://dx.doi.org/10.1002/2013WR014283 ER - TY - JOUR T1 - On the dynamics of hot air plasmas related to lightning discharges: 2. Electrodynamics AN - 1566858578; 20640533 AB - In this paper, we develop a model of electrical discharge in air for the simulation of some of the electrical processes involved in lightning discharges, as in lightning return strokes and dart leaders. The discharge is initiated by a vertical electrical field and modeled using a nonlinear R-L-C circuit model, with which we attempt to simulate initiation, growth, radial expansion, and decay of electrical discharges related to lightning. This gas dynamic type model includes also both detailed air chemistry and accurate air radiation transport, as described in the first part of this article. For certain parameter configurations, our first lightning-related discharge simulations compare well with lightning observations and actual knowledge in terms of chronology, charge and energy depleted, current created, electron concentration, temperature, pressure, and optical signature. We also discuss the difficulties to obtain fully consistent results due to the wide parameter variability, their uncertainty, and the complexity of the physics involved. Key Points * Development of a model of electrical discharge for lightning events * Simulation of initiation, growth, and decay of electrical discharges * Detailed comparison with lightning observations and actual knowledge JF - Journal of Geophysical Research: Atmospheres AU - Ripoll, Jean-Francois AU - Zinn, John AU - Colestock, Patrick L AU - Jeffery, Christopher A AD - Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 9218 EP - 9235 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 15 SN - 2169-897X, 2169-897X KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Mathematical models KW - Electrical discharge KW - Computer simulation KW - Lightning KW - Gas dynamics KW - Signatures KW - Return strokes (lightning) KW - Decay UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566858578?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Atmospheres&rft.atitle=On+the+dynamics+of+hot+air+plasmas+related+to+lightning+discharges%3A+2.+Electrodynamics&rft.au=Ripoll%2C+Jean-Francois%3BZinn%2C+John%3BColestock%2C+Patrick+L%3BJeffery%2C+Christopher+A&rft.aulast=Ripoll&rft.aufirst=Jean-Francois&rft.date=2014-08-01&rft.volume=119&rft.issue=15&rft.spage=9218&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD020068 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1002/2013JD020068 ER - TY - JOUR T1 - On the dynamics of hot air plasmas related to lightning discharges: 1. Gas dynamics AN - 1566829398; 20640511 AB - In this paper, we first study the dynamics of hot shocks in air in cylindrical geometry coupled to multiband radiation transport and detailed air chemistry. The wide energy and length scale ranges which are covered herein includes and exceeds the ones of first and subsequent return strokes happening during lightning discharges. An emphasis is put on the NO sub(x) production and the optical power emitted by strong shocks as the ones generated by Joule heating of the air from intense current flows. The production rate of NO sub(x), which is useful for atmospheric global modeling, is found to be between 4.510 super(16) and 8.610 super(16) molecules/J for all computed cases, which is in agreement with the literature. Two different radiation transport methods are used to characterize the variability of the results according to the radiation transport method. With the exact radiation solver, we show that between 15 and 40% of the energy is lost by radiation, with a percentage between 20 and 25% for averaged lightning energies. The maximal visible peak is between 710 super(8) W/m and 310 super(7) W/m obtained for, respectively, a 19 kJ/cm and a 28 J/cm energy input. The mean radiated powers in the visible range are found between 910 super(6) W/m and 210 super(5) W/m for the energies just mentioned. We discuss the agreement of these values with previous studies. Key Points * Detailed study of the dynamics of air plasmas related to lightning discharges * Characterization of production rate of NO sub(x) * Determination of optical powers emitted by hot shocks for a wide energy range JF - Journal of Geophysical Research: Atmospheres AU - Ripoll, Jean-Francois AU - Zinn, John AU - Jeffery, Christopher A AU - Colestock, Patrick L AD - Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 9196 EP - 9217 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 15 SN - 2169-897X, 2169-897X KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Radiation transport KW - Air plasma KW - Lightning KW - Solvers KW - Emittance KW - Dynamic tests KW - Return strokes (lightning) KW - Dynamics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566829398?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Atmospheres&rft.atitle=On+the+dynamics+of+hot+air+plasmas+related+to+lightning+discharges%3A+1.+Gas+dynamics&rft.au=Ripoll%2C+Jean-Francois%3BZinn%2C+John%3BJeffery%2C+Christopher+A%3BColestock%2C+Patrick+L&rft.aulast=Ripoll&rft.aufirst=Jean-Francois&rft.date=2014-08-01&rft.volume=119&rft.issue=15&rft.spage=9196&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD020067 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1002/2013JD020067 ER - TY - JOUR T1 - Atomistic modeling of intrinsic and radiation-enhanced fission gas (Xe) diffusion in UO sub(2+ or -x): Implications for nuclear fuel performance modeling AN - 1562673736; 20614148 AB - Based on density functional theory (DFT) and empirical potential calculations, the diffusivity of fission gas atoms (Xe) in UO sub(2) nuclear fuel has been calculated for a range of non-stoichiometry (i.e. UO sub(2+ or -x)), under both out-of-pile (no irradiation) and in-pile (irradiation) conditions. This was achieved by first deriving expressions for the activation energy that account for the type of trap site that the fission gas atoms occupy, which includes the corresponding type of mobile cluster, the charge state of these defects and the chemistry acting as boundary condition. In the next step DFT calculations were used to estimate migration barriers and internal energy contributions to the thermodynamic properties and calculations based on empirical potentials were used to estimate defect formation and migration entropies (i.e. pre-exponentials). The diffusivities calculated for out-of-pile conditions as function of the UO sub(2+ or -x) non-stoichiometry were used to validate the accuracy of the diffusion models and the DFT calculations against available experimental data. The Xe diffusivity is predicted to depend strongly on the UO sub(2+ or -x) non-stoichiometry due to a combination of changes in the preferred Xe trap site and in the concentration of uranium vacancies enabling Xe diffusion, which is consistent with experiments. After establishing the validity of the modeling approach, it was used for studying Xe diffusion under in-pile conditions, for which experimental data is very scarce. The radiation-enhanced Xe diffusivity is compared to existing empirical models. Finally, the predicted fission gas diffusion rates were implemented in the BISON fuel performance code and fission gas release from a Riso fuel rod irradation experiment was simulated. JF - Journal of Nuclear Materials AU - DA, Andersson AU - Garcia, P AU - Liu, X-Y AU - Pastore, G AU - Tonks, M AU - Millett, P AU - Dorado, B AU - Gaston, D R AU - Andrs, D AU - Williamson, R L AU - Martineau, R C AU - Uberuaga, B P AU - Stanek, C R AD - Materials Science and Technology Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, USA; Materials Science and Technology Division, Los Alamos National Laboratory, MS G755, Los Alamos, NM 87545, USA, andersson@lanl.gov Y1 - 2014/08// PY - 2014 DA - Aug 2014 SP - 225 EP - 242 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 451 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Thermodynamics KW - Fuels KW - Energy KW - Irradiation KW - Uranium KW - Nuclear fuels KW - Radioactive materials KW - Diffusion KW - Migration KW - Boundary conditions KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1562673736?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Atomistic+modeling+of+intrinsic+and+radiation-enhanced+fission+gas+%28Xe%29+diffusion+in+UO+sub%282%2B+or+-x%29%3A+Implications+for+nuclear+fuel+performance+modeling&rft.au=DA%2C+Andersson%3BGarcia%2C+P%3BLiu%2C+X-Y%3BPastore%2C+G%3BTonks%2C+M%3BMillett%2C+P%3BDorado%2C+B%3BGaston%2C+D+R%3BAndrs%2C+D%3BWilliamson%2C+R+L%3BMartineau%2C+R+C%3BUberuaga%2C+B+P%3BStanek%2C+C+R&rft.aulast=DA&rft.aufirst=Andersson&rft.date=2014-08-01&rft.volume=451&rft.issue=1-3&rft.spage=225&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.03.041 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 112 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Thermodynamics; Uranium; Irradiation; Energy; Fuels; Radioactive materials; Nuclear fuels; Diffusion; Boundary conditions; Migration DO - http://dx.doi.org/10.1016/j.jnucmat.2014.03.041 ER - TY - JOUR T1 - Pisces; a practical seismological database library in Python AN - 1549616759; 2014-058204 JF - Seismological Research Letters AU - MacCarthy, Jonathan K AU - Rowe, Charlotte A Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 905 EP - 911 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 4 SN - 0895-0695, 0895-0695 KW - computer programs KW - technology KW - seismicity KW - Pisces database KW - computer languages KW - data processing KW - data bases KW - Python computer language KW - information management KW - data management KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549616759?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Pisces%3B+a+practical+seismological+database+library+in+Python&rft.au=MacCarthy%2C+Jonathan+K%3BRowe%2C+Charlotte+A&rft.aulast=MacCarthy&rft.aufirst=Jonathan&rft.date=2014-08-01&rft.volume=85&rft.issue=4&rft.spage=905&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220140013 L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 23 N1 - PubXState - CA N1 - Document feature - illus. N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - computer languages; computer programs; data bases; data management; data processing; information management; Pisces database; Python computer language; seismicity; technology DO - http://dx.doi.org/10.1785/0220140013 ER - TY - JOUR T1 - A Pilot Project to Manage Kepler-Derived Data in a Digital Object Repository AN - 1641421544; 201500744 AB - Staff at the Research Library at Los Alamos National Laboratory (LANL) worked with LANL astrophysicists to archive data derived from Kepler Mission observations. The collaboration archived and preserved secondary data products so they could be linked with the research papers about the data. The large data volume, storage needed, and access issues dictated the need for the long-term management of the data. These data were used to classify stars, which were analyzed to determine more about their structure and makeup. This collaboration formed the basis of a pilot project, which used the DSpace digital object repository software. Adapted from the source document. JF - Science & Technology Libraries AU - Miller, Laniece E AU - Powell, James E AU - Guzik, Joyce A AU - Bradley, Paul A AU - Miles, Lillian F AD - Los Alamos National Laboratory, Los Alamos, New Mexico Y1 - 2014/07/03/ PY - 2014 DA - 2014 Jul 03 SP - 280 EP - 288 PB - Taylor & Francis, Philadelphia PA VL - 33 IS - 3 SN - 0194-262X, 0194-262X KW - Research centers KW - Data collection KW - Institutional repositories KW - Astronomy KW - Research libraries KW - article KW - 10.01: ELECTRONIC PUBLICATION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641421544?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Alisa&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+%26+Technology+Libraries&rft.atitle=A+Pilot+Project+to+Manage+Kepler-Derived+Data+in+a+Digital+Object+Repository&rft.au=Miller%2C+Laniece+E%3BPowell%2C+James+E%3BGuzik%2C+Joyce+A%3BBradley%2C+Paul+A%3BMiles%2C+Lillian+F&rft.aulast=Miller&rft.aufirst=Laniece&rft.date=2014-07-03&rft.volume=33&rft.issue=3&rft.spage=280&rft.isbn=&rft.btitle=&rft.title=Science+%26+Technology+Libraries&rft.issn=0194262X&rft_id=info:doi/10.1080%2F0194262X.2014.927339 LA - English DB - Library & Information Science Abstracts (LISA) N1 - Date revised - 2015-06-01 N1 - Last updated - 2016-09-27 N1 - SubjectsTermNotLitGenreText - Research libraries; Research centers; Astronomy; Data collection; Institutional repositories DO - http://dx.doi.org/10.1080/0194262X.2014.927339 ER - TY - JOUR T1 - Joint inversion of seismic and gravity data for velocity structure and hypocentral locations of the Colombian subduction zone AN - 1861089941; 768459-83 JF - Earth Sciences Research Journal AU - Syracuse, Ellen AU - Maceira, Monica AU - Prieto, German AU - Zhang, Haijiang AU - ? Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 140 PB - Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Geociencias, Bogota VL - 18, SPECIAL ISSUE SN - 1794-6190, 1794-6190 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861089941?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+Sciences+Research+Journal&rft.atitle=Joint+inversion+of+seismic+and+gravity+data+for+velocity+structure+and+hypocentral+locations+of+the+Colombian+subduction+zone&rft.au=Syracuse%2C+Ellen%3BMaceira%2C+Monica%3BPrieto%2C+German%3BZhang%2C+Haijiang%3B%3F&rft.aulast=Syracuse&rft.aufirst=Ellen&rft.date=2014-07-01&rft.volume=18%2C+SPECIAL+ISSUE&rft.issue=&rft.spage=140&rft.isbn=&rft.btitle=&rft.title=Earth+Sciences+Research+Journal&rft.issn=17946190&rft_id=info:doi/ L2 - http://www.scielo.org.co/scielo.php?script=sci_issues&pid=1794-6190&lng=en&nrm=iso LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - NEAR-UV ABSORPTION IN VERY COOL DA WHITE DWARFS AN - 1717495553; PQ0002002028 AB - The atmospheres of very cool, hydrogen-rich white dwarfs (WDs) (T sub(eff) < 6000 K) are challenging to model because of the increased complexity of the equation of state, chemical equilibrium, and opacity sources in a low-temperature, weakly ionized dense gas. In particular, many models that assume relatively simple models for the broadening of atomic levels and mostly ideal gas physics overestimate the flux in the blue part of their spectra. A solution to this problem that has met with some success is that additional opacity at short wavelengths comes for the extreme broadening of the Lyman alpha line of atomic H by collisions primarily with H sub(2). For the purpose of validating this model more rigorously, we acquired Hubble Space Telescope STIS spectra of eight very cool WDs (five DA and three DC stars). Combined with their known parallaxes, BVRIJHK, and Spitzer IRAC photometry, we analyze their entire spectral energy distribution (from 0.24 to 9.3 mu m) with a large grid of model atmospheres and synthetic spectra. We find that the red wing of the Lyman alpha line reproduces the rapidly decreasing near-UV flux of these very cool stars very well. We determine better constrained values of T sub(eff) and gravity as well as upper limits to the helium abundance in their atmospheres. JF - Astrophysical Journal AU - Saumon, D AU - Holberg, J B AU - Kowalski, P M AD - Los Alamos National Laboratory, P.O. Box 1663, Mail Stop F663, Los Alamos, NM 87545, USA, dsaumon@lanl.gov PY - 2014 SP - 1 EP - 16 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 790 IS - 1 SN - 0004-637X, 0004-637X KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - stars: abundances KW - stars: atmospheres KW - stars: fundamental parameters KW - white dwarfs KW - Atmospheric pollution models KW - Energy KW - Abundance KW - Atmospheric chemistry models KW - Absorption KW - Hubble Space Telescope KW - Stellar investigations KW - Helium KW - Freak waves KW - Equations of state KW - P 9999:GENERAL POLLUTION KW - M2 524:Stars, Universe (524) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1717495553?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Astrophysical+Journal&rft.atitle=NEAR-UV+ABSORPTION+IN+VERY+COOL+DA+WHITE+DWARFS&rft.au=Saumon%2C+D%3BHolberg%2C+J+B%3BKowalski%2C+P+M&rft.aulast=Saumon&rft.aufirst=D&rft.date=2014-07-01&rft.volume=790&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F790%2F1%2F50 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Atmospheric pollution models; Atmospheric chemistry models; Hubble Space Telescope; Helium; Stellar investigations; Freak waves; Equations of state; Energy; Abundance; Absorption DO - http://dx.doi.org/10.1088/0004-637X/790/1/50 ER - TY - JOUR T1 - Investigation of permeability alteration of fractured limestone reservoir due to geothermal heat extraction using three-dimensional thermo-hydro-chemical (THC) model AN - 1645570146; 2015-005979 AB - Heat extraction by cold water circulation disturbs the thermo-chemical equilibrium of a geothermal reservoir, activating the dissolution/precipitation of minerals in the fractures. Calcite being a more reactive mineral than other rock minerals composing the Earth crust, we investigate the permeability alteration during geothermal heat production from carbonate reservoirs. In this study the simulations are performed using the code FEHM with coupled thermo-hydro-chemical (THC) capabilities for a three dimensional domain. The computational domain consists of a single fracture connecting the injection and production wells. For reactive alteration of aperture, the model considers that the kinetics of dissolution/precipitation is coupled to the equilibrium interactions among the aqueous species/ions. The reaction rate predominantly depends on the temperature dependent solubility and advective-dispersive solute transport in the fracture. Due to the nonuniform flow fields resulting from injection and production, the coupled thermo-hydro-chemical processes initiate significant variation of the aperture alteration rate over the fracture. We have considered different operating conditions such as different mass injection rate, injection temperature and concentration of minerals. Our simulations show that dissolution and precipitation can occur simultaneously at different locations in fracture. Furthermore the reaction rate varies with time and the reaction rate can also switch between dissolution and precipitation. To illustrate this interesting behavior, the variations of shape and size of zero reaction rate contours with time are shown. An interesting outcome is a non-monotonic evolution of the overall transmissivity between the wells. The alteration of overall transmissivity largely depends on the concentration of mineral in the injected water with respect to the solubility at the initial fracture temperature. For both dissolution and precipitation controlled cases, the rapid changes in transmissivity provide challenges for maintaining circulation of water at constant mass flow rate. Abstract Copyright (2014) Elsevier, B.V. JF - Geothermics AU - Pandey, S N AU - Chaudhuri, A AU - Kelkar, S AU - Sandeep, V R AU - Rajaram, H Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 46 EP - 62 PB - Elsevier, Oxford-New York VL - 51 SN - 0375-6505, 0375-6505 KW - limestone KW - fractured materials KW - alteration KW - density KW - thermal conductivity KW - heat capacity KW - solution KW - temperature KW - reservoir rocks KW - sedimentary rocks KW - transport KW - heat flow KW - reactive transport KW - kinetics KW - three-dimensional models KW - equations KW - solubility KW - calcite KW - models KW - geothermal energy KW - geothermal reservoirs KW - precipitation KW - carbonate rocks KW - carbonates KW - permeability KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645570146?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Investigation+of+permeability+alteration+of+fractured+limestone+reservoir+due+to+geothermal+heat+extraction+using+three-dimensional+thermo-hydro-chemical+%28THC%29+model&rft.au=Pandey%2C+S+N%3BChaudhuri%2C+A%3BKelkar%2C+S%3BSandeep%2C+V+R%3BRajaram%2C+H&rft.aulast=Pandey&rft.aufirst=S&rft.date=2014-07-01&rft.volume=51&rft.issue=&rft.spage=46&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2013.11.004 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 54 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-01-15 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - alteration; calcite; carbonate rocks; carbonates; density; equations; fractured materials; geothermal energy; geothermal reservoirs; heat capacity; heat flow; kinetics; limestone; models; permeability; precipitation; reactive transport; reservoir rocks; sedimentary rocks; solubility; solution; temperature; thermal conductivity; three-dimensional models; transport DO - http://dx.doi.org/10.1016/j.geothermics.2013.11.004 ER - TY - JOUR T1 - Diagenetic origin of nodules in the Sheepbed Member, Yellowknife Bay Formation, Gale Crater, Mars AN - 1629943829; 2014-094135 AB - The Sheepbed member of the Yellowknife Bay formation in Gale crater contains millimeter-scale nodules that represent an array of morphologies unlike those previously observed in sedimentary deposits on Mars. Three types of nodules have been identified in the Sheepbed member in order of decreasing abundance: solid nodules, hollow nodules, and filled nodules, a variant of hollow nodules whose voids have been filled with sulfate minerals. This study uses Mast Camera (Mastcam) and Mars Hand Lens Imager (MAHLI) images from the Mars Science Laboratory Curiosity rover to determine the size, shape, and spatial distribution of the Sheepbed nodules. The Alpha Particle X-Ray Spectrometer (APXS) and ChemCam instruments provide geochemical data to help interpret nodule origins. Based on their physical characteristics, spatial distribution, and composition, the nodules are interpreted as concretions formed during early diagenesis. Several hypotheses are considered for hollow nodule formation including origins as primary or secondary voids. The occurrence of concretions interpreted in the Sheepbed mudstone and in several other sedimentary sequences on Mars suggests that active groundwater systems play an important role in the diagenesis of Martian sedimentary rocks. When concretions are formed during early diagenetic cementation, as interpreted for the Sheepbed nodules, they have the potential to create a taphonomic window favorable for the preservation of Martian organics. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Stack, K M AU - Grotzinger, J P AU - Kah, L C AU - Schmidt, M E AU - Mangold, N AU - Edgett, K S AU - Sumner, D Y AU - Siebach, K L AU - Nachon, M AU - Lee, R AU - Blaney, D L AU - Deflores, L P AU - Edgar, L A AU - Fairen, A G AU - Leshin, L A AU - Maurice, S AU - Oehler, Dorothy Z AU - Rice, M S AU - Wiens, R C Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 1637 EP - 1664 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 7 SN - 2169-9097, 2169-9097 KW - secondary structures KW - nodules KW - techniques KW - Mars KW - Sheepbed Member KW - life origin KW - ground water KW - Gale Crater KW - sedimentary rocks KW - alpha-ray spectroscopy KW - Curiosity Rover KW - interpretation KW - sedimentary structures KW - mudstone KW - cementation KW - Yellowknife Bay Formation KW - surface water KW - terrestrial planets KW - planets KW - concretions KW - diagenesis KW - spectroscopy KW - clastic rocks KW - aquatic environment KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943829?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Diagenetic+origin+of+nodules+in+the+Sheepbed+Member%2C+Yellowknife+Bay+Formation%2C+Gale+Crater%2C+Mars&rft.au=Stack%2C+K+M%3BGrotzinger%2C+J+P%3BKah%2C+L+C%3BSchmidt%2C+M+E%3BMangold%2C+N%3BEdgett%2C+K+S%3BSumner%2C+D+Y%3BSiebach%2C+K+L%3BNachon%2C+M%3BLee%2C+R%3BBlaney%2C+D+L%3BDeflores%2C+L+P%3BEdgar%2C+L+A%3BFairen%2C+A+G%3BLeshin%2C+L+A%3BMaurice%2C+S%3BOehler%2C+Dorothy+Z%3BRice%2C+M+S%3BWiens%2C+R+C&rft.aulast=Stack&rft.aufirst=K&rft.date=2014-07-01&rft.volume=119&rft.issue=7&rft.spage=1637&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004617 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 74 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - alpha-ray spectroscopy; aquatic environment; cementation; clastic rocks; concretions; Curiosity Rover; diagenesis; Gale Crater; ground water; instruments; interpretation; life origin; Mars; mudstone; nodules; planets; secondary structures; sedimentary rocks; sedimentary structures; Sheepbed Member; spectroscopy; surface water; techniques; terrestrial planets; Yellowknife Bay Formation DO - http://dx.doi.org/10.1002/2014JE004617 ER - TY - JOUR T1 - Smoothing and Time Series Modeling of Nuclear Material Accounting Data for Protracted Diversion Detection AN - 1567074773; 20588135 AB - The time series of material balances in nuclear material accounting (NMA) is also known as the material unaccounted for (MUF) sequence. This paper applies a joint cusum test to residual time series from NMA that arise from either of two options. The first residual series is the standardized, independently transformed MUF (SITMUF) sequence that relies on an estimate of [Sigma], the MUF covariance matrix. The second residual series arises from using either time series modeling or nonparametric smoothing on the MUF sequence and ignores the estimate of [Sigma]. Assuming that the MUF sequence is multivariate Gaussian and ignoring estimation error in [Sigma], we find the anticipated result that the first option is superior to the second option. In addition, we find that the SITMUF scheme in the first option is robust to modest estimation error in [Sigma] over a large number of idealized facilities, but not necessarily so for any specific idealized facility. These two findings provide a perspective on previous literature that addressed a perceived weakness in NMA. JF - Nuclear Science and Engineering AU - Burr, Tom AU - Hamada, Michael S AD - Los Alamos National Laboratory, Statistical Sciences Group MS-F600, Los Alamos, New Mexico 87544 tburr@lanl.gov Y1 - 2014/07// PY - 2014 DA - Jul 2014 SP - 307 EP - 320 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 177 IS - 3 SN - 0029-5639, 0029-5639 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Estimates KW - Sequences KW - Time series KW - Series (mathematics) KW - Smoothing KW - Errors KW - Accounting KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567074773?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Science+and+Engineering&rft.atitle=Smoothing+and+Time+Series+Modeling+of+Nuclear+Material+Accounting+Data+for+Protracted+Diversion+Detection&rft.au=Burr%2C+Tom%3BHamada%2C+Michael+S&rft.aulast=Burr&rft.aufirst=Tom&rft.date=2014-07-01&rft.volume=177&rft.issue=3&rft.spage=307&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/10.13182%2FNSE13-86 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Number of references - 12 N1 - Last updated - 2014-12-02 DO - http://dx.doi.org/10.13182/NSE13-86 ER - TY - JOUR T1 - Imprint of the Atlantic multi-decadal oscillation and Pacific decadal oscillation on southwestern US climate: past, present, and future AN - 1554952730; 20482692 AB - The surface air temperature increase in the southwestern United States was much larger during the last few decades than the increase in the global mean. While the global temperature increased by about 0.5 degree C from 1975 to 2000, the southwestern US temperature increased by about 2 degree C. If such an enhanced warming persisted for the next few decades, the southwestern US would suffer devastating consequences. To identify major drivers of southwestern climate change we perform a multiple-linear regression of the past 100 years of the southwestern US temperature and precipitation. We find that in the early twentieth century the warming was dominated by a positive phase of the Atlantic multi-decadal oscillation (AMO) with minor contributions from increasing solar irradiance and concentration of greenhouse gases. The late twentieth century warming was about equally influenced by increasing concentration of atmospheric greenhouse gases (GHGs) and a positive phase of the AMO. The current southwestern US drought is associated with a near maximum AMO index occurring nearly simultaneously with a minimum in the Pacific decadal oscillation (PDO) index. A similar situation occurred in mid-1950s when precipitation reached its minimum within the instrumental records. If future atmospheric concentrations of GHGs increase according to the IPCC scenarios (Solomon et al. in Climate change 2007: working group I. The Physical Science Basis, Cambridge, 996 pp, 2007), climate models project a fast rate of southwestern warming accompanied by devastating droughts (Seager et al. in Science 316:1181-1184, 2007; Williams et al. in Nat Clim Chang, 2012). However, the current climate models have not been able to predict the behavior of the AMO and PDO indices. The regression model does support the climate models (CMIP3 and CMIP5 AOGCMs) projections of a much warmer and drier southwestern US only if the AMO changes its 1,000 years cyclic behavior and instead continues to rise close to its 1975-2000 rate. If the AMO continues its quasi-cyclic behavior the US SW temperature should remain stable and the precipitation should significantly increase during the next few decades. JF - Climate Dynamics AU - Chylek, Petr AU - Dubey, Manvendra K AU - Lesins, Glen AU - Li, Jiangnan AU - Hengartner, Nicolas AD - Space and Remote Sensing, Los Alamos National Laboratory, Los Alamos, NM, USA, chylek@lanl.gov Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 119 EP - 129 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 43 IS - 1-2 SN - 0930-7575, 0930-7575 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts KW - Global temperatures KW - Rainfall KW - Climate change KW - Statistical analysis KW - Drought KW - Air temperature KW - Ocean-atmosphere system KW - Droughts KW - Atmospheric precipitations KW - Marine KW - Climate models KW - Air Temperature KW - Climates KW - Regression models KW - Temperature KW - Greenhouse effect KW - Intergovernmental Panel on Climate Change KW - Precipitation KW - Projections KW - Pacific Decadal Oscillation KW - Model Studies KW - Solar irradiance KW - Ocean currents KW - USA KW - Behavior KW - Global warming KW - Greenhouse gases KW - M2 551.583:Variations (551.583) KW - SW 0810:General KW - M3 1010:Issues in Sustainable Development KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1554952730?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+Dynamics&rft.atitle=Imprint+of+the+Atlantic+multi-decadal+oscillation+and+Pacific+decadal+oscillation+on+southwestern+US+climate%3A+past%2C+present%2C+and+future&rft.au=Chylek%2C+Petr%3BDubey%2C+Manvendra+K%3BLesins%2C+Glen%3BLi%2C+Jiangnan%3BHengartner%2C+Nicolas&rft.aulast=Chylek&rft.aufirst=Petr&rft.date=2014-07-01&rft.volume=43&rft.issue=1-2&rft.spage=119&rft.isbn=&rft.btitle=&rft.title=Climate+Dynamics&rft.issn=09307575&rft_id=info:doi/10.1007%2Fs00382-013-1933-3 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Number of references - 59 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Atmospheric precipitations; Climate change; Ocean-atmosphere system; Greenhouse effect; Droughts; Air temperature; Climate models; Global temperatures; Regression models; Statistical analysis; Precipitation; Drought; Intergovernmental Panel on Climate Change; Pacific Decadal Oscillation; Solar irradiance; Ocean currents; Global warming; Greenhouse gases; Rainfall; Temperature; Air Temperature; Behavior; Climates; Projections; Model Studies; USA; Marine DO - http://dx.doi.org/10.1007/s00382-013-1933-3 ER - TY - JOUR T1 - Human APOBEC3 induced mutation of human immunodeficiency virus type-1 contributes to adaptation and evolution in natural infection. AN - 1551018027; 25080100 AB - Human APOBEC3 proteins are cytidine deaminases that contribute broadly to innate immunity through the control of exogenous retrovirus replication and endogenous retroelement retrotransposition. As an intrinsic antiretroviral defense mechanism, APOBEC3 proteins induce extensive guanosine-to-adenosine (G-to-A) mutagenesis and inhibit synthesis of nascent human immunodeficiency virus-type 1 (HIV-1) cDNA. Human APOBEC3 proteins have additionally been proposed to induce infrequent, potentially non-lethal G-to-A mutations that make subtle contributions to sequence diversification of the viral genome and adaptation though acquisition of beneficial mutations. Using single-cycle HIV-1 infections in culture and highly parallel DNA sequencing, we defined trinucleotide contexts of the edited sites for APOBEC3D, APOBEC3F, APOBEC3G, and APOBEC3H. We then compared these APOBEC3 editing contexts with the patterns of G-to-A mutations in HIV-1 DNA in cells obtained sequentially from ten patients with primary HIV-1 infection. Viral substitutions were highest in the preferred trinucleotide contexts of the edited sites for the APOBEC3 deaminases. Consistent with the effects of immune selection, amino acid changes accumulated at the APOBEC3 editing contexts located within human leukocyte antigen (HLA)-appropriate epitopes that are known or predicted to enable peptide binding. Thus, APOBEC3 activity may induce mutations that influence the genetic diversity and adaptation of the HIV-1 population in natural infection. JF - PLoS pathogens AU - Kim, Eun-Young AU - Lorenzo-Redondo, Ramon AU - Little, Susan J AU - Chung, Yoon-Seok AU - Phalora, Prabhjeet K AU - Maljkovic Berry, Irina AU - Archer, John AU - Penugonda, Sudhir AU - Fischer, Will AU - Richman, Douglas D AU - Bhattacharya, Tanmoy AU - Malim, Michael H AU - Wolinsky, Steven M AD - Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America. ; Division of Infectious Diseases, University of California San Diego, San Diego, California, United States of America. ; Department of Infectious Diseases, King's College London, Guy's Hospital, London, United Kingdom. ; Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom. ; Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America. ; Division of Infectious Diseases, University of California San Diego, San Diego, California, United States of America; Veterans Affairs San Diego Healthcare System, San Diego, California, United States of America. ; Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America; Santa Fe Institute, Santa Fe, New Mexico, United States of America. Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 1 VL - 10 IS - 7 KW - DNA, Viral KW - 0 KW - APOBEC3H protein, human KW - EC 3.5.4.- KW - Aminohydrolases KW - APOBEC3 protein, human KW - EC 3.5.4.1 KW - APOBEC3F protein, human KW - Cytosine Deaminase KW - APOBEC-3G Deaminase KW - EC 3.5.4.5 KW - APOBEC3D protein, human KW - APOBEC3G protein, human KW - Cytidine Deaminase KW - Index Medicus KW - Phylogeny KW - Sequence Homology, Nucleic Acid KW - Humans KW - Genome, Viral KW - Aminohydrolases -- genetics KW - Polymerase Chain Reaction KW - Virus Replication -- genetics KW - Base Sequence KW - Molecular Sequence Data KW - Cytidine Deaminase -- genetics KW - DNA, Viral -- genetics KW - High-Throughput Nucleotide Sequencing KW - HIV-1 -- genetics KW - HIV Infections -- virology KW - Biological Evolution KW - HIV Infections -- immunology KW - HIV Infections -- genetics KW - Adaptation, Physiological -- genetics KW - Mutation -- genetics KW - Cytosine Deaminase -- genetics KW - Genetic Variation -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1551018027?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=PLoS+pathogens&rft.atitle=Human+APOBEC3+induced+mutation+of+human+immunodeficiency+virus+type-1+contributes+to+adaptation+and+evolution+in+natural+infection.&rft.au=Kim%2C+Eun-Young%3BLorenzo-Redondo%2C+Ramon%3BLittle%2C+Susan+J%3BChung%2C+Yoon-Seok%3BPhalora%2C+Prabhjeet+K%3BMaljkovic+Berry%2C+Irina%3BArcher%2C+John%3BPenugonda%2C+Sudhir%3BFischer%2C+Will%3BRichman%2C+Douglas+D%3BBhattacharya%2C+Tanmoy%3BMalim%2C+Michael+H%3BWolinsky%2C+Steven+M&rft.aulast=Kim&rft.aufirst=Eun-Young&rft.date=2014-07-01&rft.volume=10&rft.issue=7&rft.spage=e1004281&rft.isbn=&rft.btitle=&rft.title=PLoS+pathogens&rft.issn=1553-7374&rft_id=info:doi/10.1371%2Fjournal.ppat.1004281 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-04-02 N1 - Date created - 2014-08-01 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Syst Biol. 2006 Aug;55(4):539-52 [16785212] PLoS Pathog. 2011;7(2):e1001273 [21347345] Trends Biochem Sci. 2007 Mar;32(3):118-28 [17303427] Annu Rev Immunol. 2008;26:317-53 [18304004] Proc Natl Acad Sci U S A. 2008 Apr 8;105(14):5501-6 [18391217] PLoS Comput Biol. 2008 Apr;4(4):e1000074 [18437230] Proc Natl Acad Sci U S A. 2008 May 27;105(21):7552-7 [18490657] Retrovirology. 2008;5:51 [18577210] J Virol. 2008 Sep;82(17):8743-61 [18562517] J Virol. 2009 Jan;83(1):295-303 [18945781] Science. 2000 Jun 9;288(5472):1789-96 [10846155] Epidemics. 2009 Dec;1(4):230-9 [21352769] J Virol. 2011 Apr;85(7):3142-52 [21270145] J Virol. 2011 Aug;85(16):8197-207 [21653666] J Virol. 2011 Nov;85(21):11220-34 [21835787] Nature. 2012 Jan 19;481(7381):371-5 [22190037] PLoS Genet. 2012;8(3):e1002550 [22457633] BMC Bioinformatics. 2012;13:47 [22443413] Mol Biol Evol. 2012 Aug;29(8):1969-73 [22367748] PLoS One. 2012;7(7):e38771 [22859935] J Virol. 2012 Nov;86(21):11712-24 [22915799] J Virol. 2013 Feb;87(3):1508-17 [23152537] N Engl J Med. 2013 Jan 17;368(3):218-30 [23323898] Tissue Antigens. 2013 Mar;81(3):141-9 [23398507] PLoS Pathog. 2013;9(4):e1003294 [23593004] Cell Host Microbe. 2013 Oct 16;14(4):411-21 [24139399] Nature. 2014 Jan 30;505(7485):686-90 [24284629] J Mol Biol. 2014 Mar 20;426(6):1220-45 [24189052] PLoS Pathog. 2014 Mar;10(3):e1004024 [24651717] AIDS. 2000;14 Suppl 3:S129-40 [11086856] Cell. 2001 Feb 23;104(4):469-72 [11239404] Nature. 2001 Apr 19;410(6831):980-7 [11309628] J Virol. 2001 Sep;75(17):7973-86 [11483742] Cell. 2003 Jun 13;113(6):803-9 [12809610] Syst Biol. 2003 Oct;52(5):696-704 [14530136] Nat Med. 2003 Nov;9(11):1404-7 [14528300] Science. 2003 Nov 7;302(5647):1056-60 [14564014] Nucleic Acids Res. 2004;32(5):1792-7 [15034147] Nat Struct Mol Biol. 2004 May;11(5):435-42 [15098018] Nucleic Acids Res. 2004;32(8):2421-9 [15121899] EMBO J. 2004 Jun 16;23(12):2451-8 [15152192] Curr Biol. 2004 Aug 10;14(15):1385-91 [15296757] Curr Biol. 2004 Aug 10;14(15):1392-6 [15296758] Proc Natl Acad Sci U S A. 1988 Apr;85(8):2444-8 [3162770] Gene. 1992 Dec 15;122(2):281-8 [1336756] J Virol. 1995 Aug;69(8):5087-94 [7541846] J Hist Biol. 1970 Fall;3:189-212 [11609651] Proc Natl Acad Sci U S A. 1999 Sep 14;96(19):10752-7 [10485898] Mol Biol Evol. 2005 May;22(5):1208-22 [15703242] Bioinformatics. 2005 May 15;21(10):2531-3 [15713735] J Virol. 2005 Nov;79(21):13239-49 [16227247] Philos Trans R Soc Lond B Biol Sci. 2009 Mar 12;364(1517):675-87 [19038776] PLoS Pathog. 2009 Apr;5(4):e1000367 [19343218] PLoS Pathog. 2009 May;5(5):e1000414 [19424423] J Exp Med. 2010 Jan 18;207(1):39-49 [20038599] J Virol. 2010 May;84(10):5250-9 [20219927] PLoS Pathog. 2010 May;6(5):e1000928 [20523896] PLoS One. 2010;5(8):e12303 [20808830] J Virol. 2010 Oct;84(19):10402-5 [20660203] Tissue Antigens. 2011 Mar;77(3):206-17 [21299525] Nucleic Acids Res. 2006;34(17):4677-84 [16963778] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1371/journal.ppat.1004281 ER - TY - JOUR T1 - Enhanced carrier multiplication in engineered quasi-type-II quantum dots. AN - 1537594126; 24938462 AB - One process limiting the performance of solar cells is rapid cooling (thermalization) of hot carriers generated by higher-energy solar photons. In principle, the thermalization losses can be reduced by converting the kinetic energy of energetic carriers into additional electron-hole pairs via carrier multiplication (CM). While being inefficient in bulk semiconductors this process is enhanced in quantum dots, although not sufficiently high to considerably boost the power output of practical devices. Here we demonstrate that thick-shell PbSe/CdSe nanostructures can show almost a fourfold increase in the CM yield over conventional PbSe quantum dots, accompanied by a considerable reduction of the CM threshold. These structures enhance a valence-band CM channel due to effective capture of energetic holes into long-lived shell-localized states. The attainment of the regime of slowed cooling responsible for CM enhancement is indicated by the development of shell-related emission in the visible observed simultaneously with infrared emission from the core. JF - Nature communications AU - Cirloganu, Claudiu M AU - Padilha, Lazaro A AU - Lin, Qianglu AU - Makarov, Nikolay S AU - Velizhanin, Kirill A AU - Luo, Hongmei AU - Robel, Istvan AU - Pietryga, Jeffrey M AU - Klimov, Victor I AD - Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA. ; Department of Chemical Engineering, New Mexico State University, Las Cruces, New Mexico 88003, USA. Y1 - 2014/06/18/ PY - 2014 DA - 2014 Jun 18 SP - 4148 VL - 5 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1537594126?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+communications&rft.atitle=Enhanced+carrier+multiplication+in+engineered+quasi-type-II+quantum+dots.&rft.au=Cirloganu%2C+Claudiu+M%3BPadilha%2C+Lazaro+A%3BLin%2C+Qianglu%3BMakarov%2C+Nikolay+S%3BVelizhanin%2C+Kirill+A%3BLuo%2C+Hongmei%3BRobel%2C+Istvan%3BPietryga%2C+Jeffrey+M%3BKlimov%2C+Victor+I&rft.aulast=Cirloganu&rft.aufirst=Claudiu&rft.date=2014-06-18&rft.volume=5&rft.issue=&rft.spage=4148&rft.isbn=&rft.btitle=&rft.title=Nature+communications&rft.issn=2041-1723&rft_id=info:doi/10.1038%2Fncomms5148 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-04-07 N1 - Date created - 2014-06-18 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Nat Commun. 2012;3:908 [22713750] ACS Nano. 2012 Nov 27;6(11):9532-40 [23020520] Nano Lett. 2012 Feb 8;12(2):622-8 [22148950] Nano Lett. 2005 May;5(5):865-71 [15884885] Nano Lett. 2012 Jun 13;12(6):2658-64 [22149990] Nano Lett. 2008 Jun;8(6):1713-8 [18489170] Science. 2009 Sep 11;325(5946):1367-71 [19745146] Nano Lett. 2010 Jan;10(1):164-70 [19911830] Nat Nanotechnol. 2011 Nov;6(11):710-3 [21984044] Nano Lett. 2007 Jan;7(1):108-15 [17212448] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/ncomms5148 ER - TY - JOUR T1 - A numerical investigation of the interplay between fireline length, geometry, and rate of spread AN - 1635026512; 21047767 AB - The current study focuses on coupled dynamics and resultant geometry of fireline segments of various ignition lengths. As an example, for ignition lines of length scales typical for field experiments, fireline curvature is the result of a competition between the head fire and the flanks of the fire. A number of physical features (i.e. buoyancy and wind field divergence for example) arise in and around an incipient fire that defines the shape and spreading pattern of the flame zone. These features are explored using a numerical atmospheric dynamics model HIGRAD, and wildfire combustion physics model FIRETEC. HIGRAD/FIRETEC was designed to investigate wildfires and their interactions with the environment. In this study, the model was used to simulate grass fires that were initiated with a finite length, straight ignition line in homogeneous fuels. The dynamic evolutions of these firelines were analyzed to understand the individual events that evolve a wildfire. By understanding each individual process and how it interacts with other processes, information can be extracted to develop a theory about the mechanisms that combine to produce the observed wildfire behavior. In the current study, the flow field in the region of the simulated fires developed structures consistent with multiple buoyancy-induced vortex pairs. The series of stream-wise vortex pairs produce a regular alternating pattern of up-wash and down-wash zones, which allow air to penetrate the flame zone through troughs created in downwash regions. Consequently, this periodicity in the flow field within the fire resulted in a pattern of residual combustion where prolonged burning occurred in the up-wash zones separated by near-complete fuel depletion in the downwash zones. Some explanation is provided for why increased ignition line length leads to increased rate of spread (ROS) with some asymptotic limit. JF - Agricultural and Forest Meteorology AU - Canfield, J M AU - Linn, R R AU - Sauer, JA AU - Finney, M AU - Forthofer, Jason AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 48 EP - 59 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 189 SN - 0168-1923, 0168-1923 KW - Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; Aqualine Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Fire KW - Fireline KW - Wildfire KW - Spread KW - Vorticity KW - Vortex KW - Molecular structure KW - Grasses KW - Fuels KW - Forests KW - Field Tests KW - Divergence KW - Vortexes KW - Atmospheric circulation-oceanic circulation coupled models KW - Wind fields KW - Periodicities KW - Meteorology KW - Competition KW - Fuel KW - Wind KW - Buoyancy KW - Fires KW - Mathematical models KW - Depletion KW - Model Studies KW - Combustion KW - Shape KW - Dynamic models KW - Periodicity KW - Burning KW - Troughs KW - Evolution KW - Q2 09243:Structure, mechanics and thermodynamics KW - AQ 00006:Sewage KW - M2 551.55:Wind (551.55) KW - SW 0810:General KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1635026512?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Agricultural+and+Forest+Meteorology&rft.atitle=A+numerical+investigation+of+the+interplay+between+fireline+length%2C+geometry%2C+and+rate+of+spread&rft.au=Canfield%2C+J+M%3BLinn%2C+R+R%3BSauer%2C+JA%3BFinney%2C+M%3BForthofer%2C+Jason&rft.aulast=Canfield&rft.aufirst=J&rft.date=2014-06-01&rft.volume=189&rft.issue=&rft.spage=48&rft.isbn=&rft.btitle=&rft.title=Agricultural+and+Forest+Meteorology&rft.issn=01681923&rft_id=info:doi/10.1016%2Fj.agrformet.2014.01.007 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2016-08-17 N1 - SubjectsTermNotLitGenreText - Molecular structure; Mathematical models; Fuels; Periodicity; Wind fields; Fires; Dynamic models; Periodicities; Divergence; Atmospheric circulation-oceanic circulation coupled models; Vortexes; Troughs; Buoyancy; Wildfire; Grasses; Forests; Meteorology; Burning; Competition; Wind; Combustion; Shape; Depletion; Field Tests; Evolution; Fuel; Model Studies DO - http://dx.doi.org/10.1016/j.agrformet.2014.01.007 ER - TY - JOUR T1 - The rock abrasion record at Gale Crater; Mars Science Laboratory results from Bradbury landing to Rocknest AN - 1618132745; 2014-086503 AB - Ventifacts, rocks abraded by wind-borne particles, are found in Gale Crater, Mars. In the eastward drive from "Bradbury Landing" to "Rocknest," they account for about half of the float and outcrop seen by Curiosity's cameras. Many are faceted and exhibit abrasion textures found at a range of scales, from submillimeter lineations to centimeter-scale facets, scallops, flutes, and grooves. The drive path geometry in the first 100 sols of the mission emphasized the identification of abrasion facets and textures formed by westerly flow. This upwind direction is inconsistent with predictions based on models and the orientation of regional dunes, suggesting that these ventifact features formed from very rare high-speed winds. The absence of active sand and evidence for deflation in the area indicates that most of the ventifacts are fossil features experiencing little abrasion today. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Bridges, Nathan T AU - Calef, F J AU - Hallet, B AU - Herkenhoff, K E AU - Lanza, N L AU - Le Mouelic, S AU - Newman, C E AU - Blaney, D L AU - Pablo, M A AU - Kocurek, G A AU - Langevin, Y AU - Lewis, Kevin W AU - Mangold, N AU - Maurice, S AU - Meslin, P Y AU - Pinet, P AU - Renno, N O AU - Rice, M S AU - Richardson, M E AU - Sautter, V AU - Sletten, R S AU - Wiens, R C AU - Yingst, R A Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1374 EP - 1389 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 6 SN - 2169-9097, 2169-9097 KW - impact features KW - Bradbury Landing KW - Mars KW - Rocknest landing site KW - landing sites KW - Gale Crater KW - terrestrial planets KW - planets KW - abrasion KW - Curiosity Rover KW - surface features KW - Mars Science Laboratory KW - impact craters KW - winds KW - cameras KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618132745?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=The+rock+abrasion+record+at+Gale+Crater%3B+Mars+Science+Laboratory+results+from+Bradbury+landing+to+Rocknest&rft.au=Bridges%2C+Nathan+T%3BCalef%2C+F+J%3BHallet%2C+B%3BHerkenhoff%2C+K+E%3BLanza%2C+N+L%3BLe+Mouelic%2C+S%3BNewman%2C+C+E%3BBlaney%2C+D+L%3BPablo%2C+M+A%3BKocurek%2C+G+A%3BLangevin%2C+Y%3BLewis%2C+Kevin+W%3BMangold%2C+N%3BMaurice%2C+S%3BMeslin%2C+P+Y%3BPinet%2C+P%3BRenno%2C+N+O%3BRice%2C+M+S%3BRichardson%2C+M+E%3BSautter%2C+V%3BSletten%2C+R+S%3BWiens%2C+R+C%3BYingst%2C+R+A&rft.aulast=Bridges&rft.aufirst=Nathan&rft.date=2014-06-01&rft.volume=119&rft.issue=6&rft.spage=1374&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004579 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 78 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - abrasion; Bradbury Landing; cameras; Curiosity Rover; Gale Crater; impact craters; impact features; landing sites; Mars; Mars Science Laboratory; planets; Rocknest landing site; surface features; terrestrial planets; winds DO - http://dx.doi.org/10.1002/2013JE004579 ER - TY - JOUR T1 - Overview of the Mars Science Laboratory mission; Bradbury Landing to Yellowknife Bay and beyond AN - 1618132275; 2014-086493 AB - The Mars Science Laboratory mission reached Bradbury Landing in August 2012. In its first 500 sols, the rover Curiosity was commissioned and began its investigation of the habitability of past and present environments within Gale Crater. Curiosity traversed eastward toward Glenelg, investigating a boulder with a highly alkaline basaltic composition, encountering numerous exposures of outcropping pebble conglomerate, and sampling aeolian sediment at Rocknest and lacustrine mudstones at Yellowknife Bay. On sol 324, the mission turned its focus southwest, beginning a year-long journey to the lower reaches of Mt. Sharp, with brief stops at the Darwin and Cooperstown waypoints. The unprecedented complexity of the rover and payload systems posed challenges to science operations, as did a number of anomalies. Operational processes were revised to include additional opportunities for advance planning by the science and engineering teams. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Vasavada, A R AU - Grotzinger, J P AU - Arvidson, R E AU - Calef, F J AU - Crisp, J A AU - Gupta, S AU - Hurowitz, J AU - Mangold, N AU - Maurice, S AU - Schmidt, M E AU - Wiens, R C AU - Williams, R M E AU - Yingst, R A Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1134 EP - 1161 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 6 SN - 2169-9097, 2169-9097 KW - Yellowknife Bay KW - terrestrial planets KW - planets KW - planning KW - photogeology KW - Bradbury Landing KW - Mars Science Laboratory KW - outcrops KW - Mars KW - landing sites KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618132275?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Overview+of+the+Mars+Science+Laboratory+mission%3B+Bradbury+Landing+to+Yellowknife+Bay+and+beyond&rft.au=Vasavada%2C+A+R%3BGrotzinger%2C+J+P%3BArvidson%2C+R+E%3BCalef%2C+F+J%3BCrisp%2C+J+A%3BGupta%2C+S%3BHurowitz%2C+J%3BMangold%2C+N%3BMaurice%2C+S%3BSchmidt%2C+M+E%3BWiens%2C+R+C%3BWilliams%2C+R+M+E%3BYingst%2C+R+A&rft.aulast=Vasavada&rft.aufirst=A&rft.date=2014-06-01&rft.volume=119&rft.issue=6&rft.spage=1134&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004622 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 55 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Bradbury Landing; landing sites; Mars; Mars Science Laboratory; outcrops; photogeology; planets; planning; remote sensing; terrestrial planets; Yellowknife Bay DO - http://dx.doi.org/10.1002/2014JE004622 ER - TY - JOUR T1 - Terrain physical properties derived from orbital data and the first 360 sols of Mars Science Laboratory Curiosity Rover observations in Gale Crater AN - 1618131579; 2014-086501 AB - Physical properties of terrains encountered by the Curiosity rover during the first 360 sols of operations have been inferred from analysis of the scour zones produced by Sky Crane Landing System engine plumes, wheel touch down dynamics, pits produced by Chemical Camera (ChemCam) laser shots, rover wheel traverses over rocks, the extent of sinkage into soils, and the magnitude and sign of rover-based slippage during drives. Results have been integrated with morphologic, mineralogic, and thermophysical properties derived from orbital data, and Curiosity-based measurements, to understand the nature and origin of physical properties of traversed terrains. The hummocky plains (HP) landing site and traverse locations consist of moderately to well-consolidated bedrock of alluvial origin variably covered by slightly cohesive, hard-packed basaltic sand and dust, with both embedded and surface-strewn rock clasts. Rock clasts have been added through local bedrock weathering and impact ejecta emplacement and form a pavement-like surface in which only small clasts (<5 to 10 cm wide) have been pressed into the soil during wheel passages. The bedded fractured (BF) unit, site of Curiosity's first drilling activity, exposes several alluvial-lacustrine bedrock units with little to no soil cover and varying degrees of lithification. Small wheel sinkage values (<1 cm) for both HP and BF surfaces demonstrate that compaction resistance countering driven-wheel thrust has been minimal and that rover slippage while traversing across horizontal surfaces or going uphill, and skid going downhill, have been dominated by terrain tilts and wheel-surface material shear modulus values. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Arvidson, R E AU - Bellutta, P AU - Calef, F J AU - Fraeman, A A AU - Garvin, J B AU - Gasnault, O AU - Grant, J A AU - Grotzinger, J P AU - Hamilton, V E AU - Heverly, M AU - Iagnemma, K A AU - Johnson, J R AU - Lanza, N L AU - Le Mouelic, S AU - Mangold, N AU - Ming, D W AU - Mehta, M AU - Morris, R V AU - Newsom, H E AU - Renno, N AU - Rubin, D AU - Schieber, J AU - Sletten, R AU - Stein, N T AU - Thuillier, F AU - Vasavada, A R AU - Vizcaino, J AU - Wiens, R C Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1322 EP - 1344 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 6 SN - 2169-9097, 2169-9097 KW - impact features KW - techniques KW - Mars KW - landing sites KW - observations KW - Gale Crater KW - terrestrial planets KW - planets KW - physical properties KW - terrains KW - Curiosity Rover KW - Mars Science Laboratory KW - impact craters KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618131579?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Terrain+physical+properties+derived+from+orbital+data+and+the+first+360+sols+of+Mars+Science+Laboratory+Curiosity+Rover+observations+in+Gale+Crater&rft.au=Arvidson%2C+R+E%3BBellutta%2C+P%3BCalef%2C+F+J%3BFraeman%2C+A+A%3BGarvin%2C+J+B%3BGasnault%2C+O%3BGrant%2C+J+A%3BGrotzinger%2C+J+P%3BHamilton%2C+V+E%3BHeverly%2C+M%3BIagnemma%2C+K+A%3BJohnson%2C+J+R%3BLanza%2C+N+L%3BLe+Mouelic%2C+S%3BMangold%2C+N%3BMing%2C+D+W%3BMehta%2C+M%3BMorris%2C+R+V%3BNewsom%2C+H+E%3BRenno%2C+N%3BRubin%2C+D%3BSchieber%2C+J%3BSletten%2C+R%3BStein%2C+N+T%3BThuillier%2C+F%3BVasavada%2C+A+R%3BVizcaino%2C+J%3BWiens%2C+R+C&rft.aulast=Arvidson&rft.aufirst=R&rft.date=2014-06-01&rft.volume=119&rft.issue=6&rft.spage=1322&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004605 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 53 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Curiosity Rover; Gale Crater; impact craters; impact features; instruments; landing sites; Mars; Mars Science Laboratory; observations; physical properties; planets; techniques; terrains; terrestrial planets DO - http://dx.doi.org/10.1002/2013JE004605 ER - TY - JOUR T1 - Improved thermodynamic model for interaction of EDTA with trivalent actinides and lanthanide to ionic strength of 6.60 m AN - 1545408681; 2014-055459 AB - The dissociation constants of ethylenediaminetetraacetic acid (H (sub 4) EDTA), and the stability constants of Am (super 3+) , Cm (super 3+) and Eu (super 3+) with EDTA (super 4-) have been determined at 25 degrees C, over a range of concentration varying from 0.1 to 6.60m NaClO (sub 4) using potentiometric titration and an extraction technique, respectively. The formation of only 1:1 complex, M(EDTA) (super -) , where (M=Am (super 3+) , Cm (super 3+) and Eu (super 3+) ), was observed under the experimental conditions. The observed ionic strength dependencies of the dissociation constants and the stability constants have been described successfully over the entire ionic strength range using the Pitzer model. The thermodynamic stability constant: logbeta (sub 101) (super 0) =20.55+ or -0.18 for Am (super 3+) , logbeta (sub 101) (super 0) =20.43+ or -0.20 for Cm (super 3+) and logbeta (sub 101) (super 0) =20.65+ or -0.19 for Eu (super 3+) were calculated by extrapolation of data to zero ionic strength in an NaClO (sub 4) medium. In addition, logbeta (sub 101) (super 0) of 20.05+ or -0.40 for Am (super 3+) was obtained by simultaneously modeling data both in NaCl and NaClO (sub 4) media. For all stability constants, the Pitzer model gives an excellent representation of the data using interaction parameters beta (super (0)) , beta (super (1)) , and C (super phi ) determined in this work. The improved model presented in this work would enable researchers to model accurately the potential mobility of actinides (III) and light rare earth elements to ionic strength of 6.60m in low temperature environments in the presence of EDTA. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Thakur, Punam AU - Xiong, Yongliang AU - Borkowski, Marian AU - Choppin, Gregory R Y1 - 2014/05/15/ PY - 2014 DA - 2014 May 15 SP - 299 EP - 312 PB - Elsevier, New York, NY VL - 133 SN - 0016-7037, 0016-7037 KW - titration KW - isotopes KW - Pitzer model KW - curium KW - temperature KW - models KW - reactivity KW - organic compounds KW - organic acids KW - radioactive isotopes KW - chemical reactions KW - metals KW - EDTA KW - mathematical methods KW - americium KW - carboxylic acids KW - valency KW - rare earths KW - europium KW - thermodynamic properties KW - actinides KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545408681?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Improved+thermodynamic+model+for+interaction+of+EDTA+with+trivalent+actinides+and+lanthanide+to+ionic+strength+of+6.60+m&rft.au=Thakur%2C+Punam%3BXiong%2C+Yongliang%3BBorkowski%2C+Marian%3BChoppin%2C+Gregory+R&rft.aulast=Thakur&rft.aufirst=Punam&rft.date=2014-05-15&rft.volume=133&rft.issue=&rft.spage=299&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2013.09.040 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 69 N1 - PubXState - NY N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2014-07-17 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - actinides; americium; carboxylic acids; chemical reactions; curium; EDTA; europium; isotopes; mathematical methods; metals; models; organic acids; organic compounds; Pitzer model; radioactive isotopes; rare earths; reactivity; temperature; thermodynamic properties; titration; valency DO - http://dx.doi.org/10.1016/j.gca.2013.09.040 ER - TY - JOUR T1 - Isotopic evidence for reduction of anthropogenic hexavalent chromium in Los Alamos National Laboratory ground water AN - 1549616713; 2014-057898 AB - Reduction of toxic Cr(VI) to less toxic Cr(III) is an important process for attenuating Cr(VI) transport in groundwater. This process results in immobilization of chromium as Cr(III) and effectively decreases the overall mobility of the chromium inventory. During both abiotic and biotic reduction of Cr(VI) to Cr(III), a kinetic isotope effect occurs in which the lighter isotope, (super 52) Cr, reacts preferentially, leaving the remaining dissolved Cr(VI) enriched in the heavier isotope, (super 53) Cr. Cr isotopes have proven to be a useful tool for estimating the magnitude of Cr(VI) reduction and for determining where in a hydrologic system reduction is occurring. In this paper, we discuss patterns of reduction in perched-intermediate and regional aquifer systems contaminated with Cr(VI) related to historical use of potassium dichromate as an anticorrosion agent in cooling towers at a power plant at the Los Alamos National Laboratory in northern New Mexico. We utilize Cr isotopes to assess the relative effects of mixing and reduction on measured delta (super 53) Cr in groundwater, with an emphasis on where in the system reduction occurs. Chromium isotope measurements provide strong evidence for reduction of Cr(VI) in vadose zone basalts. Abstract Copyright (2014) Elsevier, B.V. JF - Chemical Geology AU - Heikoop, Jeffrey M AU - Johnson, Thomas M AU - Birdsell, Kay H AU - Longmire, Patrick AU - Hickmott, Donald D AU - Jacobs, Elaine P AU - Broxton, David E AU - Katzman, Danny AU - Vesselinov, Velimir V AU - Ding, Mei AU - Vaniman, David T AU - Reneau, Steven L AU - Goering, Tim J AU - Glessner, Justin AU - Basu, Anirban Y1 - 2014/05/12/ PY - 2014 DA - 2014 May 12 SP - 1 EP - 9 PB - Elsevier, Amsterdam VL - 373 SN - 0009-2541, 0009-2541 KW - United States KW - solute transport KW - hazardous waste KW - volcanic rocks KW - isotopes KW - waste water KW - igneous rocks KW - unsaturated zone KW - mass spectra KW - New Mexico KW - Los Alamos County New Mexico KW - environmental analysis KW - stable isotopes KW - radioactive waste KW - ground water KW - attenuation KW - transport KW - water treatment KW - basalts KW - valency KW - spectra KW - reduction KW - water pollution KW - kinetics KW - chromium KW - liquid phase KW - pollutants KW - isotope ratios KW - human activity KW - pollution KW - Los Alamos National Laboratory KW - chromates KW - aquifers KW - ICP mass spectra KW - Cr-53/Cr-52 KW - metals KW - mobilization KW - waste disposal KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549616713?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Isotopic+evidence+for+reduction+of+anthropogenic+hexavalent+chromium+in+Los+Alamos+National+Laboratory+ground+water&rft.au=Heikoop%2C+Jeffrey+M%3BJohnson%2C+Thomas+M%3BBirdsell%2C+Kay+H%3BLongmire%2C+Patrick%3BHickmott%2C+Donald+D%3BJacobs%2C+Elaine+P%3BBroxton%2C+David+E%3BKatzman%2C+Danny%3BVesselinov%2C+Velimir+V%3BDing%2C+Mei%3BVaniman%2C+David+T%3BReneau%2C+Steven+L%3BGoering%2C+Tim+J%3BGlessner%2C+Justin%3BBasu%2C+Anirban&rft.aulast=Heikoop&rft.aufirst=Jeffrey&rft.date=2014-05-12&rft.volume=373&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2014.02.022 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 41 N1 - Document feature - illus. incl. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-07-31 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - aquifers; attenuation; basalts; chromates; chromium; Cr-53/Cr-52; environmental analysis; ground water; hazardous waste; human activity; ICP mass spectra; igneous rocks; isotope ratios; isotopes; kinetics; liquid phase; Los Alamos County New Mexico; Los Alamos National Laboratory; mass spectra; metals; mobilization; New Mexico; pollutants; pollution; radioactive waste; reduction; solute transport; spectra; stable isotopes; transport; United States; unsaturated zone; valency; volcanic rocks; waste disposal; waste water; water pollution; water treatment DO - http://dx.doi.org/10.1016/j.chemgeo.2014.02.022 ER - TY - JOUR T1 - The critical role of grain orientation and applied stress in nanoscale twinning. AN - 1523408024; 24811868 AB - Numerous recent studies have focused on the effects of grain size on deformation twinning in nanocrystalline fcc metals. However, grain size alone cannot explain many observed twinning characteristics. Here we show that the propensity for twinning is dependent on the applied stress, grain orientation and stacking fault energy. The lone factor for twinning dependent on grain size is the stress necessary to nucleate partial dislocations from a boundary. We use bulk processing of controlled nanostructures coupled with unique orientation mapping at the nanoscale to show the profound effect of crystal orientation on deformation twinning. Our theoretical model reveals an orientation-dependent critical threshold stress for twinning, which is presented in the form of a generalized twinnability map. Our findings provide a newfound orientation-based explanation for the grain size effect: as grain size decreases the applied stress needed for further deformation increases, thereby allowing more orientations to reach the threshold stress for twinning. JF - Nature communications AU - McCabe, Rodney J AU - Beyerlein, Irene J AU - Carpenter, John S AU - Mara, Nathan A AD - Materials Science and Technology Division, MST-6: materials technology-metallurgy, Los Alamos, New Mexico 87545, USA. ; Theoretical Division, T-3: fluid dynamics and solid mechanics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. ; 1] Materials Science and Technology Division, MST-6: materials technology-metallurgy, Los Alamos, New Mexico 87545, USA [2] Materials Physics and Applications Division, MPA-CINT: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. Y1 - 2014/05/09/ PY - 2014 DA - 2014 May 09 SP - 3806 VL - 5 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1523408024?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+communications&rft.atitle=The+critical+role+of+grain+orientation+and+applied+stress+in+nanoscale+twinning.&rft.au=McCabe%2C+Rodney+J%3BBeyerlein%2C+Irene+J%3BCarpenter%2C+John+S%3BMara%2C+Nathan+A&rft.aulast=McCabe&rft.aufirst=Rodney&rft.date=2014-05-09&rft.volume=5&rft.issue=&rft.spage=3806&rft.isbn=&rft.btitle=&rft.title=Nature+communications&rft.issn=2041-1723&rft_id=info:doi/10.1038%2Fncomms4806 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-03-30 N1 - Date created - 2014-05-09 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/ncomms4806 ER - TY - CPAPER T1 - A resonance technique for the acoustic characterization of liquids in harsh environments T2 - 167th Meeting of the Acoustical Society of America AN - 1548627519; 6291419 JF - 167th Meeting of the Acoustical Society of America AU - Sturtevant, Blake Y1 - 2014/05/05/ PY - 2014 DA - 2014 May 05 KW - Resonance KW - Acoustics KW - Harsh environments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1548627519?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=167th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=A+resonance+technique+for+the+acoustic+characterization+of+liquids+in+harsh+environments&rft.au=Sturtevant%2C+Blake&rft.aulast=Sturtevant&rft.aufirst=Blake&rft.date=2014-05-05&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=167th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - http://acousticalsociety.org/sites/default/files/docs/fullprogram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-30 N1 - Last updated - 2014-07-28 ER - TY - CPAPER T1 - Materials and fabrication techniques for resonant ultrasound spectroscopy at high and low temperatures T2 - 167th Meeting of the Acoustical Society of America AN - 1548627236; 6291417 JF - 167th Meeting of the Acoustical Society of America AU - Migliori, Albert Y1 - 2014/05/05/ PY - 2014 DA - 2014 May 05 KW - Low temperature KW - Spectroscopy KW - Ultrasound UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1548627236?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=167th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Materials+and+fabrication+techniques+for+resonant+ultrasound+spectroscopy+at+high+and+low+temperatures&rft.au=Migliori%2C+Albert&rft.aulast=Migliori&rft.aufirst=Albert&rft.date=2014-05-05&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=167th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - http://acousticalsociety.org/sites/default/files/docs/fullprogram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-30 N1 - Last updated - 2014-07-28 ER - TY - CPAPER T1 - Acceleration of acoustical emission precursors preceding failure in sheared granular material T2 - 167th Meeting of the Acoustical Society of America AN - 1548623049; 6291415 JF - 167th Meeting of the Acoustical Society of America AU - Johnson, Paul Y1 - 2014/05/05/ PY - 2014 DA - 2014 May 05 KW - Emissions KW - Acceleration UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1548623049?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=167th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Acceleration+of+acoustical+emission+precursors+preceding+failure+in+sheared+granular+material&rft.au=Johnson%2C+Paul&rft.aulast=Johnson&rft.aufirst=Paul&rft.date=2014-05-05&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=167th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - http://acousticalsociety.org/sites/default/files/docs/fullprogram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-30 N1 - Last updated - 2014-07-28 ER - TY - CPAPER T1 - Nuclear material identification using resonant ultrasound spectroscopy T2 - 167th Meeting of the Acoustical Society of America AN - 1548623035; 6291422 JF - 167th Meeting of the Acoustical Society of America AU - Pantea, Cristian AU - Saleh, Tarik AU - Migliori, Albert AU - Betts, Jonathan AU - Luther, Erik AU - Byler, Darrin Y1 - 2014/05/05/ PY - 2014 DA - 2014 May 05 KW - Radioactive materials KW - Spectroscopy KW - Ultrasound UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1548623035?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=167th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Nuclear+material+identification+using+resonant+ultrasound+spectroscopy&rft.au=Pantea%2C+Cristian%3BSaleh%2C+Tarik%3BMigliori%2C+Albert%3BBetts%2C+Jonathan%3BLuther%2C+Erik%3BByler%2C+Darrin&rft.aulast=Pantea&rft.aufirst=Cristian&rft.date=2014-05-05&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=167th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - http://acousticalsociety.org/sites/default/files/docs/fullprogram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-30 N1 - Last updated - 2014-07-28 ER - TY - JOUR T1 - Radioiodine concentrated in a wetland AN - 1777469022; 2016-027387 AB - Most subsurface environmental radioactivity contamination is expected to eventually resurface in riparian zones, or wetlands. There are a number of extremely sharp biogeochemical interfaces in wetlands that could alter radionuclide speciation and promote accumulation. The objective of this study was to determine if a wetland concentrated (super 129) I emanating from a former waste disposal basin located on the Savannah River Site (SRS) in South Carolina, USA. Additionally, studies were conducted to evaluate the role of sediment organic matter in immobilizing the radioiodine. Groundwater samples were collected along a 0.7-km transect away from the seepage basin and in the downstream wetlands. The samples were analyzed for (super 129) I speciation (iodide (I (super -) ), iodate (IO (sub 3) (super -) ), and organo-I). Groundwater (super 129) I concentrations in many locations in the wetlands (as high as 59.9 Bq L (super -1129) I) were greatly elevated with respect to the source term (5.9 Bq L (super -1129) I). (super 129) I concentration profiles in sediment cores were closely correlated to organic matter concentrations (r (super 2) = 0.992; n = 5). While the sediment organic matter promoted the uptake of (super 129) I to the wetland sediment, it also promoted the formation of a soluble organic fraction: 74% of the wetland groundwater (super 129) I could pass through a 1 kDa (<1 nm) membrane and only 26% of the (super 129) I was colloidal. Of that fraction that could pass through a 1 kDa membrane, 39% of the (super 129) I was organo-I. Therefore, while wetlands may be highly effective at immobilizing aqueous (super 129) I, they may also promote the formation of a low-molecular-weight organic species that does not partition to sediments. This study provides a rare example of radioactivity concentrations increasing rather than decreasing as it migrates from a point source and brings into question assumptions in risk models regarding continuous dilution of released contaminants. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Kaplan, Daniel I AU - Zhang, Saijin AU - Roberts, Kimberly A AU - Schwehr, Kathy AU - Xu, Chen AU - Creeley, Danielle AU - Ho, Yi-Fang AU - Li, Hsiu-Ping AU - Yeager, Chris M AU - Santschi, Peter H Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 57 EP - 61 PB - Elsevier, Oxford VL - 131 SN - 0265-931X, 0265-931X KW - United States KW - hazardous waste KW - halides KW - electrical conductivity KW - South Carolina KW - isotopes KW - radioactivity KW - halogens KW - vegetation KW - environmental analysis KW - seepage KW - radioactive waste KW - ground water KW - iodine KW - radioactive isotopes KW - I-129 KW - sediments KW - gamma-ray spectra KW - drainage basins KW - spectra KW - water pollution KW - pH KW - iodides KW - pollutants KW - physicochemical properties KW - pollution KW - correlation KW - iodates KW - organic compounds KW - riparian environment KW - wetlands KW - mobilization KW - waste disposal KW - Savannah River Site KW - chemical fractionation KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777469022?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Environmental+Radioactivity&rft.atitle=Radioiodine+concentrated+in+a+wetland&rft.au=Kaplan%2C+Daniel+I%3BZhang%2C+Saijin%3BRoberts%2C+Kimberly+A%3BSchwehr%2C+Kathy%3BXu%2C+Chen%3BCreeley%2C+Danielle%3BHo%2C+Yi-Fang%3BLi%2C+Hsiu-Ping%3BYeager%2C+Chris+M%3BSantschi%2C+Peter+H&rft.aulast=Kaplan&rft.aufirst=Daniel&rft.date=2014-05-01&rft.volume=131&rft.issue=&rft.spage=57&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2013.09.001 L2 - http://www.sciencedirect.com/science/journal/0265931X LA - English DB - GeoRef N1 - Conference title - 12th international conference on the Biogeochemistry of trace elements N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 41 N1 - Document feature - illus. incl. 2 tables, sketch map N1 - Last updated - 2016-04-01 N1 - SubjectsTermNotLitGenreText - chemical fractionation; correlation; drainage basins; electrical conductivity; environmental analysis; gamma-ray spectra; ground water; halides; halogens; hazardous waste; I-129; iodates; iodides; iodine; isotopes; mobilization; organic compounds; pH; physicochemical properties; pollutants; pollution; radioactive isotopes; radioactive waste; radioactivity; riparian environment; Savannah River Site; sediments; seepage; South Carolina; spectra; United States; vegetation; waste disposal; water pollution; wetlands DO - http://dx.doi.org/10.1016/j.jenvrad.2013.09.001 ER - TY - JOUR T1 - South African rollback: revisiting monitoring and verification lessons after 20 years AN - 1554208098; 4589143 AB - As the only country in history to have created, then voluntarily renounced, a nuclear arsenal, South Africa is often referenced as a potential model for nuclear disarmament. However, this article argues that there are sharp limitations on the extent to which the South African case can be applied as a model for other countries to follow. Because South Africa unilaterally dismantled its program and only brought in inspectors from the International Atomic Energy Agency (IAEA) and key member states after the dismantlement was complete, information vital to the verification process was lost to the international community. As a model of a cooperative verification, South Africa thus highlights both the difficulties that monitoring and verification regimes will encounter, as well as the opportunities that they afford. Reprinted by permission of Taylor & Francis Ltd. JF - Comparative strategy AU - Busch, Nathan E AU - Pilat, Joseph F AD - Christopher Newport University ; Los Alamos National Laboratory Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 236 EP - 261 VL - 33 IS - 3 SN - 0149-5933, 0149-5933 KW - Political Science KW - Nuclear strategy KW - Co-operatives KW - Member states KW - International community KW - South Africa KW - Monitoring KW - IAEA UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1554208098?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aibss&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Comparative+strategy&rft.atitle=South+African+rollback%3A+revisiting+monitoring+and+verification+lessons+after+20+years&rft.au=Busch%2C+Nathan+E%3BPilat%2C+Joseph+F&rft.aulast=Busch&rft.aufirst=Nathan&rft.date=2014-05-01&rft.volume=33&rft.issue=3&rft.spage=236&rft.isbn=&rft.btitle=&rft.title=Comparative+strategy&rft.issn=01495933&rft_id=info:doi/10.1080%2F01495933.2014.897132 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2014-08-18 N1 - Last updated - 2014-08-19 N1 - SubjectsTermNotLitGenreText - 6696 2603; 8776 3349 5574 10472; 6162 6772 9030; 7919 6772 9030; 8247 6103 11032 9705; 2409; 385 395 2 DO - http://dx.doi.org/10.1080/01495933.2014.897132 ER - TY - JOUR T1 - An efficient finite-difference method with high-order accuracy in both time and space domains for modelling scalar-wave propagation AN - 1542643223; 2014-046813 AB - For modeling large-scale 3-D scalar-wave propagation, the finite-difference (FD) method with high-order accuracy in space but second-order accuracy in time is widely used because of its relatively low requirements of computer memory. We develop a novel staggered-grid (SG) FD method with high-order accuracy not only in space, but also in time, for solving 2- and 3-D scalar-wave equations. We determine the coefficients of the FD operator in the joint time-space domain to achieve high-order accuracy in time while preserving high-order accuracy in space. Our new FD scheme is based on a stencil that contains a few more grid points than the standard stencil. It is 2M-th-order accurate in space and fourth-order accurate in time when using 2M grid points along each axis and wavefields at one time step as the standard SGFD method. We validate the accuracy and efficiency of our new FD scheme using dispersion analysis and numerical modelling of scalar-wave propagation in 2- and 3-D complex models with a wide range of velocity contrasts. For media with a velocity contrast up to five, our new FD scheme is approximately two times more computationally efficient than the standard SGFD scheme with almost the same computer-memory requirement as the latter. Further numerical experiments demonstrate that our new FD scheme loses its advantages over the standard SGFD scheme if the velocity contrast is 10. However, for most large-scale geophysical applications, the velocity contrasts often range approximately from 1 to 3. Our new method is thus particularly useful for large-scale 3-D scalar-wave modeling and full-waveform inversion. JF - Geophysical Journal International AU - Tan, Sirui AU - Huang, Lianjie Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 1250 EP - 1267 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 197 IS - 2 SN - 0956-540X, 0956-540X KW - numerical models KW - finite difference analysis KW - geophysical methods KW - data processing KW - information management KW - two-dimensional models KW - seismic methods KW - data management KW - computer programs KW - mathematical methods KW - propagation KW - algorithms KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643223?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=An+efficient+finite-difference+method+with+high-order+accuracy+in+both+time+and+space+domains+for+modelling+scalar-wave+propagation&rft.au=Tan%2C+Sirui%3BHuang%2C+Lianjie&rft.aulast=Tan&rft.aufirst=Sirui&rft.date=2014-05-01&rft.volume=197&rft.issue=2&rft.spage=1250&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu077 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 27 N1 - Document feature - illus. incl. 7 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-07-04 N1 - SubjectsTermNotLitGenreText - algorithms; computer programs; data management; data processing; finite difference analysis; geophysical methods; information management; mathematical methods; numerical models; propagation; seismic methods; two-dimensional models DO - http://dx.doi.org/10.1093/gji/ggu077 ER - TY - JOUR T1 - Generating regional infrasound celerity-range models using ground-truth information and the implications for event location AN - 1542642403; 2014-046806 AB - Celerity-range models, where celerity is defined as the epicentral distance divided by the total traveltime (similar to the definition of group velocity for dispersed seismic surface waves), can be used for the association of infrasound automatic detections, for event location and for the validation of acoustic propagation simulations. Signals recorded from ground truth events are used to establish celerity-range models, but data coverage is uneven in both space and time. To achieve a high density of regional recordings we use data from USArray seismic stations recording air-to-ground coupled waves from explosions during the summers of 2004-2008 at the Utah Training and Test Range, in the western United States, together with data from five microbarograph arrays at regional distances (90%) when compared to those estimated using the global International Data Center model, particularly for events where stations detect arrivals at ranges <350 km. While adding data-based prior information into the Bayesian Infrasound Source Localization (BISL) method is also shown to increase precision, to increase accuracy, the parameter space must be expanded to include station-specific celerity distributions. JF - Geophysical Journal International AU - Nippress, Alexandra AU - Green, David N AU - Marcillo, Omar E AU - Arrowsmith, Stephen J Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 1154 EP - 1165 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 197 IS - 2 SN - 0956-540X, 0956-540X KW - United States KW - technology KW - monitoring KW - statistical analysis KW - simulation KW - Utah Training and Test Range KW - models KW - ground truth KW - seismicity KW - propagation KW - probability KW - focus KW - Utah KW - histograms KW - earthquakes KW - acoustical waves KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542642403?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Generating+regional+infrasound+celerity-range+models+using+ground-truth+information+and+the+implications+for+event+location&rft.au=Nippress%2C+Alexandra%3BGreen%2C+David+N%3BMarcillo%2C+Omar+E%3BArrowsmith%2C+Stephen+J&rft.aulast=Nippress&rft.aufirst=Alexandra&rft.date=2014-05-01&rft.volume=197&rft.issue=2&rft.spage=1154&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu049 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 33 N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - Last updated - 2014-07-04 N1 - SubjectsTermNotLitGenreText - acoustical waves; Comprehensive Test Ban Treaty; earthquakes; focus; ground truth; histograms; models; monitoring; probability; propagation; seismicity; simulation; statistical analysis; technology; United States; Utah; Utah Training and Test Range DO - http://dx.doi.org/10.1093/gji/ggu049 ER - TY - JOUR T1 - Review of 'Too Hot To Touch: The Problem of High-Level Nuclear Waste' by William M. Alley and Rosemarie Alley AN - 1529959744; 19843468 AB - "Too Hot to Touch" by Bill and Rosemarie Alley chronicles the intermittent 60-year effort by the federal government to find a permanent solution for the disposal of high-level nuclear waste. It is a fascinating and well-told story that draws on a combination of public media and government reports. It is not optimistic that a solution to the problem will soon be found given the social, political, and technical challenges. JF - Geofluids AU - Kwicklis, E M AD - Computational Earth Science Group Earth and Environmental Sciences Division. Los Alamos National Laboratory Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 127 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 14 IS - 2 SN - 1468-8115, 1468-8115 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Radioactive Wastes KW - Reviews KW - Radioactive wastes KW - Governments KW - SW 5010:Network design KW - Q2 09184:Composition of water UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529959744?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geofluids&rft.atitle=Review+of+%27Too+Hot+To+Touch%3A+The+Problem+of+High-Level+Nuclear+Waste%27+by+William+M.+Alley+and+Rosemarie+Alley&rft.au=Kwicklis%2C+E+M&rft.aulast=Kwicklis&rft.aufirst=E&rft.date=2014-05-01&rft.volume=14&rft.issue=2&rft.spage=127&rft.isbn=&rft.btitle=&rft.title=Geofluids&rft.issn=14688115&rft_id=info:doi/10.1111%2Fgfl.12068 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2015-07-23 N1 - SubjectsTermNotLitGenreText - Radioactive wastes; Governments; Radioactive Wastes; Reviews DO - http://dx.doi.org/10.1111/gfl.12068 ER - TY - JOUR T1 - Ultraviolet photodissociation enhances top-down mass spectrometry as demonstrated on green fluorescent protein variants AN - 1529950236; 19847221 AB - Ultraviolet photodissociation (UVPD) is a compelling fragmentation technique with great potential to enhance proteomics generally and top-down MS specifically. In this issue, Cannon et al. (Proteomics 2014, 14, XXXX-XXXX) use UVPD to perform top-down MS on several sequence variants of green fluorescent protein and compare the results to CID, higher energy collision induced dissociation, and electron transfer dissociation. As compared to the other techniques UVPD produces a wider variety of fragment ion types that are relatively evenly distributed across the protein sequences. Overall, their results demonstrate enhanced sequence coverage and higher confidence in sequence assignment via UVPD MS. Based on these and other recent results UVPD is certain to become an increasingly widespread and valuable tool for top-down proteomics. JF - Proteomics AU - Dang, Xibei AU - Young, Nicolas L AD - Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA. Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 1128 EP - 1129 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 14 IS - 10 SN - 1615-9853, 1615-9853 KW - Biotechnology and Bioengineering Abstracts KW - U.V. radiation KW - Energy KW - Green fluorescent protein KW - proteomics KW - Electron transfer KW - Mass spectroscopy KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529950236?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proteomics&rft.atitle=Ultraviolet+photodissociation+enhances+top-down+mass+spectrometry+as+demonstrated+on+green+fluorescent+protein+variants&rft.au=Dang%2C+Xibei%3BYoung%2C+Nicolas+L&rft.aulast=Dang&rft.aufirst=Xibei&rft.date=2014-05-01&rft.volume=14&rft.issue=10&rft.spage=1128&rft.isbn=&rft.btitle=&rft.title=Proteomics&rft.issn=16159853&rft_id=info:doi/10.1002%2Fpmic.201400114 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2014-06-12 N1 - SubjectsTermNotLitGenreText - U.V. radiation; Energy; Green fluorescent protein; proteomics; Electron transfer; Mass spectroscopy DO - http://dx.doi.org/10.1002/pmic.201400114 ER - TY - JOUR T1 - The first pilot project of the consortium for top-down proteomics: A status report AN - 1529949401; 19847213 AB - Pilot Project #1-the identification and characterization of human histone H4 proteoforms by top-down MS-is the first project launched by the Consortium for Top-Down Proteomics (CTDP) to refine and validate top-down MS. Within the initial results from seven participating laboratories, all reported the probability-based identification of human histone H4 (UniProt accession P62805) with expectation values ranging from 10 super(-13) to 10 super(-105). Regarding characterization, a total of 74 proteoforms were reported, with 21 done so unambiguously; one new PTM, K79ac, was identified. Inter-laboratory comparison reveals aspects of the results that are consistent, such as the localization of individual PTMs and binary combinations, while other aspects are more variable, such as the accurate characterization of low-abundance proteoforms harboring >2 PTMs. An open-access tool and discussion of proteoform scoring are included, along with a description of general challenges that lie ahead including improved proteoform separations prior to mass spectrometric analysis, better instrumentation performance, and software development. JF - Proteomics AU - Dang, Xibei AU - Scotcher, Jenna AU - Wu, Si AU - Chu, Rosalie K AU - Tolic, Nikola AU - Ntai, Ioanna AU - Thomas, Paul M AU - Fellers, Ryan T AU - Early, Bryan P AU - Zheng, Yupeng AU - Durbin, Kenneth R AU - LeDuc, Richard D AU - Wolff, Jeremy J AU - Thompson, Christopher J AU - Pan, Jingxi AU - Han, Jun AU - Shaw, Jared B AU - Salisbury, Joseph P AU - Easterling, Michael AU - Borchers, Christoph H AU - Brodbelt, Jennifer S AU - Agar, Jeffery N AU - Pasa-Tolic, Ljiljana AU - Kelleher, Neil L AU - Young, Nicolas L AD - Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA. Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 1130 EP - 1140 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 14 IS - 10 SN - 1615-9853, 1615-9853 KW - Biotechnology and Bioengineering Abstracts KW - Computer programs KW - software KW - Histone H4 KW - proteomics KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529949401?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proteomics&rft.atitle=The+first+pilot+project+of+the+consortium+for+top-down+proteomics%3A+A+status+report&rft.au=Dang%2C+Xibei%3BScotcher%2C+Jenna%3BWu%2C+Si%3BChu%2C+Rosalie+K%3BTolic%2C+Nikola%3BNtai%2C+Ioanna%3BThomas%2C+Paul+M%3BFellers%2C+Ryan+T%3BEarly%2C+Bryan+P%3BZheng%2C+Yupeng%3BDurbin%2C+Kenneth+R%3BLeDuc%2C+Richard+D%3BWolff%2C+Jeremy+J%3BThompson%2C+Christopher+J%3BPan%2C+Jingxi%3BHan%2C+Jun%3BShaw%2C+Jared+B%3BSalisbury%2C+Joseph+P%3BEasterling%2C+Michael%3BBorchers%2C+Christoph+H%3BBrodbelt%2C+Jennifer+S%3BAgar%2C+Jeffery+N%3BPasa-Tolic%2C+Ljiljana%3BKelleher%2C+Neil+L%3BYoung%2C+Nicolas+L&rft.aulast=Dang&rft.aufirst=Xibei&rft.date=2014-05-01&rft.volume=14&rft.issue=10&rft.spage=1130&rft.isbn=&rft.btitle=&rft.title=Proteomics&rft.issn=16159853&rft_id=info:doi/10.1002%2Fpmic.201300438 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2014-06-12 N1 - SubjectsTermNotLitGenreText - Computer programs; software; Histone H4; proteomics DO - http://dx.doi.org/10.1002/pmic.201300438 ER - TY - JOUR T1 - Nitrogen Fertilization Has a Stronger Effect on Soil Nitrogen-Fixing Bacterial Communities than Elevated Atmospheric CO2 AN - 1524411297; 19802305 AB - Biological nitrogen fixation is the primary supply of N to most ecosystems, yet there is considerable uncertainty about how N-fixing bacteria will respond to global change factors such as increasing atmospheric CO2 and N deposition. Using the nifH gene as a molecular marker, we studied how the community structure of N-fixing soil bacteria from temperate pine, aspen, and sweet gum stands and a brackish tidal marsh responded to multiyear elevated CO2 conditions. We also examined how N availability, specifically, N fertilization, interacted with elevated CO2 to affect these communities in the temperate pine forest. Based on data from Sanger sequencing and quantitative PCR, the soil nifH composition in the three forest systems was dominated by species in the Geobacteraceae and, to a lesser extent, Alphaproteobacteria. The N-fixing-bacterial-community structure was subtly altered after 10 or more years of elevated atmospheric CO2, and the observed shifts differed in each biome. In the pine forest, N fertilization had a stronger effect on nifH community structure than elevated CO2 and suppressed the diversity and abundance of N-fixing bacteria under elevated atmospheric CO2 conditions. These results indicate that N-fixing bacteria have complex, interacting responses that will be important for understanding ecosystem productivity in a changing climate. JF - Applied and Environmental Microbiology AU - Berthrong, Sean T AU - Yeager, Chris M AU - Gallegos-Graves, Laverne AU - Steven, Blaire AU - Eichorst, Stephanie A AU - Jackson, Robert B AU - Kuske, Cheryl R AD - Department of Horticulture, Cornell University, Ithaca, New York, USA, kuske@lanl.gov. Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 3103 EP - 3112 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 United States VL - 80 IS - 10 SN - 0099-2240, 0099-2240 KW - Microbiology Abstracts B: Bacteriology; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Bacteria KW - Sweet taste KW - Data processing KW - Abundance KW - Climate KW - Forests KW - Marshes KW - NifH gene KW - Soil microorganisms KW - Soil KW - Fertilization KW - Geobacteraceae KW - Pyruvic acid KW - Nitrogen fixation KW - Community structure KW - Polymerase chain reaction KW - Carbon dioxide KW - A 01400:Soil Microbes KW - J 02450:Ecology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524411297?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+and+Environmental+Microbiology&rft.atitle=Nitrogen+Fertilization+Has+a+Stronger+Effect+on+Soil+Nitrogen-Fixing+Bacterial+Communities+than+Elevated+Atmospheric+CO2&rft.au=Berthrong%2C+Sean+T%3BYeager%2C+Chris+M%3BGallegos-Graves%2C+Laverne%3BSteven%2C+Blaire%3BEichorst%2C+Stephanie+A%3BJackson%2C+Robert+B%3BKuske%2C+Cheryl+R&rft.aulast=Berthrong&rft.aufirst=Sean&rft.date=2014-05-01&rft.volume=80&rft.issue=10&rft.spage=3103&rft.isbn=&rft.btitle=&rft.title=Applied+and+Environmental+Microbiology&rft.issn=00992240&rft_id=info:doi/10.1128%2FAEM.04034-13 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Number of references - 54 N1 - Last updated - 2014-06-26 N1 - SubjectsTermNotLitGenreText - Sweet taste; Data processing; Climate; Abundance; Forests; Marshes; NifH gene; Soil microorganisms; Soil; Fertilization; Pyruvic acid; Nitrogen fixation; Community structure; Polymerase chain reaction; Carbon dioxide; Bacteria; Geobacteraceae DO - http://dx.doi.org/10.1128/AEM.04034-13 ER - TY - JOUR T1 - Non-invasive intravital imaging of cellular differentiation with a bright red-excitable fluorescent protein. AN - 1520345062; 24633408 AB - A method for non-invasive visualization of genetically labeled cells in animal disease models with micrometer-level resolution would greatly facilitate development of cell-based therapies. Imaging of fluorescent proteins (FPs) using red excitation light in the 'optical window' above 600 nm is one potential method for visualizing implanted cells. However, previous efforts to engineer FPs with peak excitation beyond 600 nm have resulted in undesirable reductions in brightness. Here we report three new red-excitable monomeric FPs obtained by structure-guided mutagenesis of mNeptune. Two of these, mNeptune2 and mNeptune2.5, demonstrate improved maturation and brighter fluorescence than mNeptune, whereas the third, mCardinal, has a red-shifted excitation spectrum without reduction in brightness. We show that mCardinal can be used to non-invasively and longitudinally visualize the differentiation of myoblasts into myocytes in living mice with high anatomical detail. JF - Nature methods AU - Chu, Jun AU - Haynes, Russell D AU - Corbel, Stéphane Y AU - Li, Pengpeng AU - González-González, Emilio AU - Burg, John S AU - Ataie, Niloufar J AU - Lam, Amy J AU - Cranfill, Paula J AU - Baird, Michelle A AU - Davidson, Michael W AU - Ng, Ho-Leung AU - Garcia, K Christopher AU - Contag, Christopher H AU - Shen, Kang AU - Blau, Helen M AU - Lin, Michael Z AD - 1] Department of Bioengineering, Stanford University, Stanford, California, USA. [2] Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA. ; 1] Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, USA. [2] Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA. ; Department of Biological Sciences, Stanford University, Stanford, California, USA. ; 1] Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA. [2] Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, California, USA. ; 1] Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California, USA. [2] Department of Structural Biology, Stanford University School of Medicine, Stanford, California, USA. ; Department of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii, USA. ; 1] Department of Biological Science, Florida State University, Tallahassee, Florida, USA. [2] National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, USA. ; 1] Department of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii, USA. [2] University of Hawaii Cancer Center, Honolulu, Hawaii, USA. ; 1] Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California, USA. [2] Department of Structural Biology, Stanford University School of Medicine, Stanford, California, USA. [3] Howard Hughes Medical Institute, Stanford University, Stanford, California, USA. ; 1] Department of Biological Sciences, Stanford University, Stanford, California, USA. [2] Howard Hughes Medical Institute, Stanford University, Stanford, California, USA. ; 1] Department of Bioengineering, Stanford University, Stanford, California, USA. [2] Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA. [3] Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, California, USA. Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 572 EP - 578 VL - 11 IS - 5 KW - Hemoglobins KW - 0 KW - Luminescent Proteins KW - Myoglobin KW - red fluorescent protein KW - Index Medicus KW - Muscle, Skeletal -- pathology KW - Animals KW - Myoglobin -- chemistry KW - HeLa Cells KW - Humans KW - Mice KW - Mice, Nude KW - NIH 3T3 Cells KW - Mutagenesis KW - Stem Cells -- cytology KW - Myoblasts -- metabolism KW - Regeneration KW - Molecular Sequence Data KW - Crystallography, X-Ray KW - Muscles -- pathology KW - Hemoglobins -- chemistry KW - Muscle Cells -- metabolism KW - Hydrogen Bonding KW - Male KW - Gene Library KW - Cell Differentiation KW - Microscopy, Fluorescence -- methods KW - Luminescent Proteins -- metabolism KW - Diagnostic Imaging -- methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520345062?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+methods&rft.atitle=Non-invasive+intravital+imaging+of+cellular+differentiation+with+a+bright+red-excitable+fluorescent+protein.&rft.au=Chu%2C+Jun%3BHaynes%2C+Russell+D%3BCorbel%2C+St%C3%A9phane+Y%3BLi%2C+Pengpeng%3BGonz%C3%A1lez-Gonz%C3%A1lez%2C+Emilio%3BBurg%2C+John+S%3BAtaie%2C+Niloufar+J%3BLam%2C+Amy+J%3BCranfill%2C+Paula+J%3BBaird%2C+Michelle+A%3BDavidson%2C+Michael+W%3BNg%2C+Ho-Leung%3BGarcia%2C+K+Christopher%3BContag%2C+Christopher+H%3BShen%2C+Kang%3BBlau%2C+Helen+M%3BLin%2C+Michael+Z&rft.aulast=Chu&rft.aufirst=Jun&rft.date=2014-05-01&rft.volume=11&rft.issue=5&rft.spage=572&rft.isbn=&rft.btitle=&rft.title=Nature+methods&rft.issn=1548-7105&rft_id=info:doi/10.1038%2Fnmeth.2888 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-06-16 N1 - Date created - 2014-04-30 N1 - Date revised - 2017-02-17 N1 - Genetic sequence - KJ131552; GENBANK; KJ131553; KJ131554; 4OQW; PDB; 4OJ0 N1 - SuppNotes - Cited By: Nat Methods. 2010 Oct;7(10):827-9 [20818379] Biophys J. 2010 Jul 21;99(2):L13-5 [20643047] Cold Spring Harb Perspect Biol. 2010 Dec;2(12):a003848 [20861158] Nat Biotechnol. 2011 Aug;29(8):757-61 [21765402] Nat Methods. 2011 Sep;8(9):771-7 [21804536] Nat Methods. 2011 Sep;8(9):726-8 [21878918] Stem Cell Res Ther. 2011;2(1):3 [21345268] Nat Methods. 2012 Oct;9(10):1005-12 [22961245] Science. 2002 Nov 22;298(5598):1582-7 [12446901] Neuron. 2000 Jun;26(3):583-94 [10896155] J Biomed Opt. 2001 Oct;6(4):432-40 [11728202] Biophys J. 2001 May;80(5):2396-408 [11325739] Neoplasia. 2000 Jan-Apr;2(1-2):26-40 [10933066] Annu Rev Biomed Eng. 2002;4:235-60 [12117758] Free Radic Biol Med. 2002 Sep 1;33(5):611-9 [12208347] Anal Chem. 2004 Oct 15;76(20):6144-9 [15481965] Exp Eye Res. 1988 Jul;47(1):71-86 [3409988] EMBO J. 1991 Dec;10(12):3959-70 [1935914] Appl Spectrosc. 2005 Feb;59(2):190-3 [15720759] Biotechnol Annu Rev. 2005;11:227-56 [16216779] Nat Methods. 2005 Dec;2(12):905-9 [16299475] Biochemistry. 2006 Sep 19;45(37):11103-12 [16964971] Structure. 2006 Nov;14(11):1617-22 [17098187] Cell. 2008 Feb 8;132(3):487-98 [18267078] Nature. 2008 May 15;453(7193):345-51 [18480816] Nature. 2008 Nov 27;456(7221):502-6 [18806774] Biochem J. 2009 Mar 15;418(3):567-74 [19143658] Science. 2009 May 8;324(5928):804-7 [19423828] Acta Crystallogr D Biol Crystallogr. 2009 Sep;65(Pt 9):921-31 [19690370] Chem Biol. 2009 Nov 25;16(11):1169-79 [19942140] Acta Crystallogr D Biol Crystallogr. 2010 Jan;66(Pt 1):22-5 [20057045] Acta Crystallogr D Biol Crystallogr. 2010 Feb;66(Pt 2):125-32 [20124692] Acta Crystallogr D Biol Crystallogr. 2010 Feb;66(Pt 2):213-21 [20124702] Acta Crystallogr D Biol Crystallogr. 2010 Apr;66(Pt 4):486-501 [20383002] J Mass Spectrom. 2010 Oct;45(10):1139-47 [20860013] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/nmeth.2888 ER - TY - JOUR T1 - Coastal Greenland air temperature extremes and trends 1890-2010; annual and monthly analysis AN - 1637543224; 2014-101721 AB - We use observed air temperature data series from 14 meteorological stations in coastal Greenland (located all around the Greenland Ice Sheet) for 1960-2010, where long-term records for five of the stations extend back to 1890, to illustrate the annual and monthly temporal and spatial distribution of temperature extremes, with the main focus on the latest decade 2001-2010 (2000s). We find that the 2000s had the highest number of mean annual air temperature (MAAT) warm extremes, and the 1890s the highest number of cold extremes, and that a high (low) positive North Atlantic Oscillation (NAO) Index equals a high number of cold (warm) extreme events. For the 2000s the number of warm extremes was significantly higher by around 50% than the number in the 1940s (the early twentieth century warm period): the latter being the decade with the second highest occurrence of MAAT warm extremes. Since 1960, based on MAAT the number of cold extremes has overall decreased on the decadal timescale, besides a peak in 1980s, while warm extremes have increased, leading to a higher occurrence of extremes (cold plus warm extremes): an almost similar pattern occurred for monthly mean temperatures and monthly mean daily maximum and minimum temperature datasets. Furthermore, a division of Greenland into east and west sectors shows that the occurrence of cold (warm) extremes was more pronounced in the East than in the West in the 1960s and 1970s (mid-1980s to the 2000s). Abstract Copyright (2013), Royal Meteorological Society. JF - International Journal of Climatology AU - Mernild, Sebastian H AU - Hanna, Edward AU - Yde, Jacob C AU - Cappelen, John AU - Malmros, Jeppe K Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 1472 EP - 1487 PB - Wiley Interscience, Chichester VL - 34 IS - 5 SN - 0899-8418, 0899-8418 KW - North Atlantic Oscillation KW - Quaternary KW - Arctic region KW - Greenland ice sheet KW - Holocene KW - temperature KW - time scales KW - Cenozoic KW - spatial distribution KW - Greenland KW - coastal environment KW - seasonal variations KW - upper Holocene KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637543224?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Climatology&rft.atitle=Coastal+Greenland+air+temperature+extremes+and+trends+1890-2010%3B+annual+and+monthly+analysis&rft.au=Mernild%2C+Sebastian+H%3BHanna%2C+Edward%3BYde%2C+Jacob+C%3BCappelen%2C+John%3BMalmros%2C+Jeppe+K&rft.aulast=Mernild&rft.aufirst=Sebastian&rft.date=2014-04-01&rft.volume=34&rft.issue=5&rft.spage=1472&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Climatology&rft.issn=08998418&rft_id=info:doi/10.1002%2Fjoc.3777 L2 - http://www3.interscience.wiley.com/cgi-bin/jhome/4735 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 38 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2014-12-18 N1 - SubjectsTermNotLitGenreText - Arctic region; Cenozoic; coastal environment; Greenland; Greenland ice sheet; Holocene; North Atlantic Oscillation; Quaternary; seasonal variations; spatial distribution; temperature; time scales; upper Holocene DO - http://dx.doi.org/10.1002/joc.3777 ER - TY - JOUR T1 - Reflection and implantation of low energy helium with tungsten surfaces AN - 1554954407; 20219534 AB - Reflection and implantation of low energy helium (He) ions by tungsten (W) substrate are studied using molecular dynamics (MD) simulations. Motivated by the ITER divertor design, our study considers a range of W substrate temperatures (300 K, 1000 K, 1500 K), a range of He atom incidence energies ([= or <, slanted] 100 eV) and a range of angles of incidence (0-75[degrees]) with respect to substrate normal. The MD simulations quantify the reflection and implantation function, the integrated moments such as the particle/ energy reflection coefficients and average implantation depths. Distributions of implantation depths, reflected energy, polar and azimuthal angles of reflection are obtained, as functions of simulation parameters, such as W substrate temperature, polar angle of incidence, the energy of incident He, and the type of W substrate surface. Comparison between the MD simulation results, the results obtained using SR1M simulation package, and the existing experimental and theoretical results is provided. JF - Journal of Nuclear Materials AU - Borovikov, Valery AU - Voter, Arthur F AU - Tang, Xian-Zhu AD - Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, USA, valery@lanl.gov Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 254 EP - 270 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 447 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Ions KW - Energy KW - Radioactive materials KW - Temperature KW - Simulation KW - Helium KW - Particulates KW - Tungsten KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1554954407?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Reflection+and+implantation+of+low+energy+helium+with+tungsten+surfaces&rft.au=Borovikov%2C+Valery%3BVoter%2C+Arthur+F%3BTang%2C+Xian-Zhu&rft.aulast=Borovikov&rft.aufirst=Valery&rft.date=2014-04-01&rft.volume=447&rft.issue=1-3&rft.spage=254&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.01.021 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Number of references - 24 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Ions; Energy; Radioactive materials; Temperature; Helium; Simulation; Particulates; Tungsten DO - http://dx.doi.org/10.1016/j.jnucmat.2014.01.021 ER - TY - JOUR T1 - Estimating the average concentration of minor and trace elements in surficial sediments using fractal methods AN - 1535202930; 2014-042171 AB - The methods chosen to calculate the average value of the concentration for any geochemical element should depend on the probability distribution of the element abundance data. In this study, a fractal-based method was introduced to estimate the mean concentrations of geochemical elements that follow fractal frequency distributions. The fractal-based method has been tested on two abundance datasets for Ag, As, Au, Cu, Pb, Zn, Ce, Cr, and U from 529 floodplain sediment samples in China and from 10,927 stream sediment samples in Zhejiang Province, China. We compared the fractal method with other methods, including the arithmetic averaging, geometric averaging, and median, and found that there exist large discrepancies among these averages. The results show that the average calculated using the fractal-based method is always smaller than the arithmetic average and also generally smaller than the geometric mean and the median. The discrepancies may be attributed to the fact that the datasets follow a fractal distribution rather than a normal or a lognormal distribution. This study indicates that calculated arithmetic mean, geometric mean, or median may overestimate the average concentrations for elements that follow a fractal distribution. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Geochemical Exploration AU - Ma, Tuhua AU - Li, Changjiang AU - Lu, Zhiming Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 207 EP - 216 PB - Elsevier, Amsterdam-New York VL - 139 SN - 0375-6742, 0375-6742 KW - toxic materials KW - Zhejiang China KW - Far East KW - minor elements KW - pollutants KW - pollution KW - environmental analysis KW - urban environment KW - geochemical surveys KW - soil pollution KW - metals KW - mathematical methods KW - geochemical methods KW - sediments KW - surveys KW - Zhuji China KW - trace elements KW - chemical composition KW - Asia KW - fractals KW - China KW - 02C:Geochemistry of rocks, soils, and sediments KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535202930?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geochemical+Exploration&rft.atitle=Estimating+the+average+concentration+of+minor+and+trace+elements+in+surficial+sediments+using+fractal+methods&rft.au=Ma%2C+Tuhua%3BLi%2C+Changjiang%3BLu%2C+Zhiming&rft.aulast=Ma&rft.aufirst=Tuhua&rft.date=2014-04-01&rft.volume=139&rft.issue=&rft.spage=207&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geochemical+Exploration&rft.issn=03756742&rft_id=info:doi/10.1016%2Fj.gexplo.2013.08.008 L2 - http://www.sciencedirect.com/science/journal/03756742 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 41 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2014-06-13 N1 - CODEN - JGCEAT N1 - SubjectsTermNotLitGenreText - Asia; chemical composition; China; environmental analysis; Far East; fractals; geochemical methods; geochemical surveys; mathematical methods; metals; minor elements; pollutants; pollution; sediments; soil pollution; surveys; toxic materials; trace elements; urban environment; Zhejiang China; Zhuji China DO - http://dx.doi.org/10.1016/j.gexplo.2013.08.008 ER - TY - JOUR T1 - Sequential fragmentation/transport theory, pyroclast size-density relationships, and the emplacement dynamics of pyroclastic density currents; a case study on the Mt. St. Helens (USA) 1980 eruption AN - 1535201843; 2014-042105 AB - Pyroclastic density currents (PDCs) are the most dangerous hazard associated with explosive volcanic eruptions. Despite recent advancements in the general understanding of PDC dynamics, limited direct observation and/or outcrop scarcity often hinder the interpretation of specific transport and depositional processes at many volcanoes. This study explores the potential of sequential fragmentation/transport theory (SFT; cf. Wohletz et al., 1989), a modeling method capable of predicting particle mass distributions based on the physical principles of fragmentation and transport, to retrieve the transport and depositional dynamics of well-characterized PDCs from the size and density distributions of individual components within the deposits. The extensive vertical and lateral exposures through the May 18th, 1980 PDC deposits at Mt. St. Helens (MSH) provide constraints on PDC regimes and flow boundary conditions at specific locations across the depositional area. Application to MSH deposits suggests that SFT parameter distributions can be effectively used to characterize flow boundary conditions and emplacement processes for a variety of PDC lithofacies and deposit locations. Results demonstrate that (1) the SFT approach reflects particle fragmentation and transport mechanisms regardless of variations in initial component distributions, consistent with results from previous studies; (2) SFT analysis reveals changes in particle characteristics that are not directly observable in grain size and fabric data; and (3) SFT parameters are more sensitive to regional transport conditions than local (outcrop-scale) depositional processes. The particle processing trends produced using SFT analysis are consistent with the degree of particle processing inferred from lithofacies architectures: for all lithofacies examined in this study, suspension sedimentation products exhibit much better processing than concentrated current deposits. Integrated field observations and SFT results provide evidence for increasing density segregation within the depositional region of the currents away from source, as well as for comparable density-segregation processes acting on lithic concentrations and pumice lenses within the current. These findings further define and reinforce the capability of SFT analysis to complement more conventional PDC study methods, significantly expanding the information gained regarding flow dynamics. Finally, this case study demonstrates that the SFT methodology has the potential to constrain regional flow conditions at volcanoes where outcrop exposures are limited. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Volcanology and Geothermal Research AU - Mackaman-Lofland, Chelsea AU - Brand, Brittany D AU - Taddeucci, Jacopo AU - Wohletz, Kenneth Y1 - 2014/04/01/ PY - 2014 DA - 2014 Apr 01 SP - 1 EP - 13 PB - Elsevier, Amsterdam VL - 275 SN - 0377-0273, 0377-0273 KW - United States KW - Skamania County Washington KW - density currents KW - fragmentation KW - volcanic rocks KW - geologic hazards KW - density KW - Mount Saint Helens KW - igneous rocks KW - explosive eruptions KW - transport KW - pyroclastic flows KW - dynamics KW - granulometry KW - currents KW - Washington KW - clasts KW - emplacement KW - size KW - crystals KW - Cascade Range KW - pyroclastics KW - lithofacies KW - viscosity KW - pumice KW - natural hazards KW - volcanoes KW - 24:Quaternary geology KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535201843?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Volcanology+and+Geothermal+Research&rft.atitle=Sequential+fragmentation%2Ftransport+theory%2C+pyroclast+size-density+relationships%2C+and+the+emplacement+dynamics+of+pyroclastic+density+currents%3B+a+case+study+on+the+Mt.+St.+Helens+%28USA%29+1980+eruption&rft.au=Mackaman-Lofland%2C+Chelsea%3BBrand%2C+Brittany+D%3BTaddeucci%2C+Jacopo%3BWohletz%2C+Kenneth&rft.aulast=Mackaman-Lofland&rft.aufirst=Chelsea&rft.date=2014-04-01&rft.volume=275&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Journal+of+Volcanology+and+Geothermal+Research&rft.issn=03770273&rft_id=info:doi/10.1016%2Fj.jvolgeores.2014.01.016 L2 - http://www.sciencedirect.com/science/journal/03770273 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 45 N1 - Document feature - illus. incl. 2 tables, strat. col. N1 - Last updated - 2014-06-13 N1 - CODEN - JVGRDQ N1 - SubjectsTermNotLitGenreText - Cascade Range; clasts; crystals; currents; density; density currents; dynamics; emplacement; explosive eruptions; fragmentation; geologic hazards; granulometry; igneous rocks; lithofacies; Mount Saint Helens; natural hazards; pumice; pyroclastic flows; pyroclastics; size; Skamania County Washington; transport; United States; viscosity; volcanic rocks; volcanoes; Washington DO - http://dx.doi.org/10.1016/j.jvolgeores.2014.01.016 ER - TY - JOUR T1 - Historical and future learning about climate sensitivity AN - 1534834885; 19790218 AB - Equilibrium climate sensitivity measures the long-term response of surface temperature to changes in atmospheric CO sub(2). The range of climate sensitivities in the Intergovernmental Panel on Climate Change Fifth Assessment Report is unchanged from that published almost 30years earlier in the Charney Report. We conduct perfect model experiments using an energy balance model to study the rate at which uncertainties might be reduced by observation of global temperature and ocean heat uptake. We find that a climate sensitivity of 1.5 degree C can be statistically distinguished from 3 degree C by 2030, 3 degree C from 4.5 degree C by 2040, and 4.5 degree C from 6 degree C by 2065. Learning rates are slowest in the scenarios of greatest concern (high sensitivities), due to a longer ocean response time, which may have bearing on wait-and-see versus precautionary mitigation policies. Learning rates are optimistic in presuming the availability of whole ocean heat data but pessimistic by using simple aggregated metrics and model physics. Key Points * Climate sensitivity uncertainty not greatly reduced over decades of research * Continued observations may substantially reduce uncertainty over the next decades * Rate of learning may affect wait-and-see versus precautionary mitigation policies JF - Geophysical Research Letters AU - Urban, Nathan M AU - Holden, Philip B AU - Edwards, Neil R AU - Sriver, Ryan L AU - Keller, Klaus AD - Computational Physics and Methods (CCS-2), Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 2543 EP - 2552 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 41 IS - 7 SN - 0094-8276, 0094-8276 KW - Environmental Engineering Abstracts (EN); Aerospace & High Technology Database (AH) KW - climate sensitivity KW - uncertainty KW - learning KW - feedback KW - transient KW - ocean heat KW - Uncertainty KW - Policies KW - Learning KW - Uptakes KW - Availability KW - Oceans KW - Climate KW - Carbon dioxide UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1534834885?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Historical+and+future+learning+about+climate+sensitivity&rft.au=Urban%2C+Nathan+M%3BHolden%2C+Philip+B%3BEdwards%2C+Neil+R%3BSriver%2C+Ryan+L%3BKeller%2C+Klaus&rft.aulast=Urban&rft.aufirst=Nathan&rft.date=2014-04-01&rft.volume=41&rft.issue=7&rft.spage=2543&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL059484 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-07-01 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1002/2014GL059484 ER - TY - JOUR T1 - Constitutive model for unfrozen water content in subfreezing unsaturated soils AN - 1529794114; 2014-037086 AB - A new constitutive relationship for phase partitioning of water in frozen soils is proposed. This relationship extends to unsaturated conditions established relationships for gas-free conditions by smoothing a thermodynamically derived relationship to eliminate a jump discontinuity at the freezing temperature. This relationship is shown to compare well with experimental data on unfrozen water content as a function of temperature for different total water content values. Using this new relationship, a modified nonisothermal Richards equation is solved for flow in freezing soil. The results based on this modified Richards equation are shown to compare well with data from two different column experiments. JF - Vadose Zone Journal AU - Painter, Scott L AU - Karra, Satish Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 8 PB - Soil Science Society of America, Madison, WI VL - 13 IS - 4 KW - water KW - soils KW - experimental studies KW - pressure KW - moisture KW - unsaturated zone KW - fluid phase KW - equations KW - freezing KW - simulation KW - temperature KW - gases KW - liquid pressure KW - Richards equation KW - ice KW - heat flow KW - constitutive equations KW - thermodynamic properties KW - frozen ground KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529794114?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Constitutive+model+for+unfrozen+water+content+in+subfreezing+unsaturated+soils&rft.au=Painter%2C+Scott+L%3BKarra%2C+Satish&rft.aulast=Painter&rft.aufirst=Scott&rft.date=2014-04-01&rft.volume=13&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2013.04.0071 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 33 N1 - PubXState - WI N1 - Document feature - illus. N1 - Last updated - 2014-08-14 N1 - SubjectsTermNotLitGenreText - constitutive equations; equations; experimental studies; fluid phase; freezing; frozen ground; gases; heat flow; ice; liquid pressure; moisture; pressure; Richards equation; simulation; soils; temperature; thermodynamic properties; unsaturated zone; water DO - http://dx.doi.org/10.2136/vzj2013.04.0071 ER - TY - JOUR T1 - Enabling ammonia-borane: co-oligomerizaiton of ammonia-borane and amine-boranes yield liquid products AN - 1524407139; 19751549 AB - In contrast to neat ammonia-borane (AB), the thermal decomposition of AB with N-substituted amine-boranes yields a liquid product after extended heating and H sub(2) release. NMR and GPC data indicate that co-oligomerization has occurred. These results show promise for developing high energy density AB-based fuel formulations for automotive applications. JF - Energy & Environmental Science AU - Carre-Burritt, Asa E AU - Davis, Benjamin L AU - Rekken, Brian D AU - Mack, Nathan AU - Semelsberger, Troy A AD - MPA-11, Materials Synthesis and Integrated Devices; MS J514; Los Alamos National Laboratory; Los Alamos; NM; 87545; USA; +1-505-667-3314; +1-505-500-2463; , bldavis@lanl.gov Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 1653 EP - 1656 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 7 IS - 5 SN - 1754-5692, 1754-5692 KW - Environment Abstracts KW - Energy KW - Fuels KW - Thermal decomposition KW - NMR KW - ENA 18:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524407139?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environmental+Science&rft.atitle=Enabling+ammonia-borane%3A+co-oligomerizaiton+of+ammonia-borane+and+amine-boranes+yield+liquid+products&rft.au=Carre-Burritt%2C+Asa+E%3BDavis%2C+Benjamin+L%3BRekken%2C+Brian+D%3BMack%2C+Nathan%3BSemelsberger%2C+Troy+A&rft.aulast=Carre-Burritt&rft.aufirst=Asa&rft.date=2014-04-01&rft.volume=7&rft.issue=5&rft.spage=1653&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environmental+Science&rft.issn=17545692&rft_id=info:doi/10.1039%2Fc4ee00442f LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Number of references - 26 N1 - Last updated - 2015-08-05 N1 - SubjectsTermNotLitGenreText - Fuels; Energy; Thermal decomposition; NMR DO - http://dx.doi.org/10.1039/c4ee00442f ER - TY - JOUR T1 - Atmospheric and oceanic climate forcing of the exceptional Greenland ice sheet surface melt in summer 2012 AN - 1535205358; 2014-038924 AB - The NASA announcement of record surface melting of the Greenland ice sheet in July 2012 led us to examine the atmospheric and oceanic climatic anomalies that are likely to have contributed to these exceptional conditions and also to ask the question of how unusual these anomalies were compared to available records. Our analysis allows us to assess the relative contributions of these two key influences to both the extreme melt event and ongoing climate change. In 2012, as in recent warm summers since 2007, a blocking high pressure feature, associated with negative NAO conditions, was present in the mid-troposphere over Greenland for much of the summer. This circulation pattern advected relatively warm southerly winds over the western flank of the ice sheet, forming a 'heat dome' over Greenland that led to the widespread surface melting. Both sea-surface temperature and sea-ice cover anomalies seem to have played a minimal role in this record melt, relative to atmospheric circulation. Two representative coastal climatological station averages and several individual stations in south, west and north-west Greenland set new surface air temperature records for May, June, July and the whole (JJA) summer. The unusually warm summer 2012 conditions extended to the top of the ice sheet at Summit, where our reanalysed (1994-2012) DMI Summit weather station summer (JJA) temperature series set new record high mean and extreme temperatures in 2012; 3-hourly instantaneous 2-m temperatures reached an exceptional value of 2.2 degrees C at Summit on 11 July 2012. These conditions translated into the record observed ice-sheet wide melt during summer 2012. However, 2012 seems not to be climatically representative of future 'average' summers projected this century. Abstract Copyright (2013), Royal Meteorological Society. JF - International Journal of Climatology AU - Hanna, Edward AU - Fettweis, Xavier AU - Mernild, Sebastian H AU - Cappelen, John AU - Ribergaard, Mads H AU - Shuman, Christopher A AU - Steffen, Konrad AU - Wood, Len AU - Mote, Thomas L Y1 - 2014/03/30/ PY - 2014 DA - 2014 Mar 30 SP - 1022 EP - 1037 PB - Wiley Interscience, Chichester VL - 34 IS - 4 SN - 0899-8418, 0899-8418 KW - Arctic region KW - sea ice KW - Greenland ice sheet KW - ice sheets KW - deglaciation KW - climate change KW - temperature KW - Greenland KW - melting KW - ice KW - climate effects KW - atmospheric pressure KW - glacial geology KW - meteorology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535205358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Climatology&rft.atitle=Atmospheric+and+oceanic+climate+forcing+of+the+exceptional+Greenland+ice+sheet+surface+melt+in+summer+2012&rft.au=Hanna%2C+Edward%3BFettweis%2C+Xavier%3BMernild%2C+Sebastian+H%3BCappelen%2C+John%3BRibergaard%2C+Mads+H%3BShuman%2C+Christopher+A%3BSteffen%2C+Konrad%3BWood%2C+Len%3BMote%2C+Thomas+L&rft.aulast=Hanna&rft.aufirst=Edward&rft.date=2014-03-30&rft.volume=34&rft.issue=4&rft.spage=1022&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Climatology&rft.issn=08998418&rft_id=info:doi/10.1002%2Fjoc.3743 L2 - http://www3.interscience.wiley.com/cgi-bin/jhome/4735 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 46 N1 - Document feature - illus. incl. 9 tables, sketch map N1 - Last updated - 2014-06-13 N1 - SubjectsTermNotLitGenreText - Arctic region; atmospheric pressure; climate change; climate effects; deglaciation; glacial geology; Greenland; Greenland ice sheet; ice; ice sheets; melting; meteorology; sea ice; temperature DO - http://dx.doi.org/10.1002/joc.3743 ER - TY - JOUR T1 - Triggering of repeating earthquakes in Central California AN - 1560083009; 2014-069040 AB - Dynamic stresses carried by transient seismic waves have been found capable of triggering earthquakes instantly in various tectonic settings. Delayed triggering may be even more common, but the mechanisms are not well understood. Catalogs of repeating earthquakes, earthquakes that recur repeatedly at the same location, provide ideal data sets to test the effects of transient dynamic perturbations on the timing of earthquake occurrence. Here we employ a catalog of 165 families containing approximately 2500 total repeating earthquakes to test whether dynamic perturbations from local, regional, and teleseismic earthquakes change recurrence intervals. The distance to the earthquake generating the perturbing waves is a proxy for the relative potential contributions of static and dynamic deformations, because static deformations decay more rapidly with distance. Clear changes followed the nearby 2004 M (sub w) 6 Parkfield earthquake, so we study only repeaters prior to its origin time. We apply a Monte Carlo approach to compare the observed number of shortened recurrence intervals following dynamic perturbations with the distribution of this number estimated for randomized perturbation times. We examine the comparison for a series of dynamic stress peak amplitude and distance thresholds. The results suggest a weak correlation between dynamic perturbations in excess of approximately 20 kPa and shortened recurrence intervals, for both nearby and remote perturbations. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Wu, Chunquan AU - Gomberg, Joan AU - Ben-Naim, Eli AU - Johnson, Paul Y1 - 2014/03/16/ PY - 2014 DA - 2014 Mar 16 SP - 1499 EP - 1505 PB - American Geophysical Union, Washington, DC VL - 41 IS - 5 SN - 0094-8276, 0094-8276 KW - United States KW - Parkfield earthquakes KW - focal mechanism KW - risk management KW - Fresno County California KW - Central California KW - magnitude KW - California KW - Parkfield earthquake 2004 KW - recurrence interval KW - earthquake prediction KW - seismic risk KW - risk assessment KW - tectonics KW - earthquakes KW - seismotectonics KW - transient dynamic perturbations KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560083009?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Triggering+of+repeating+earthquakes+in+Central+California&rft.au=Wu%2C+Chunquan%3BGomberg%2C+Joan%3BBen-Naim%2C+Eli%3BJohnson%2C+Paul&rft.aulast=Wu&rft.aufirst=Chunquan&rft.date=2014-03-16&rft.volume=41&rft.issue=5&rft.spage=1499&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2013GL059051 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 45 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-09-05 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - California; Central California; earthquake prediction; earthquakes; focal mechanism; Fresno County California; magnitude; Parkfield earthquake 2004; Parkfield earthquakes; recurrence interval; risk assessment; risk management; seismic risk; seismotectonics; tectonics; transient dynamic perturbations; United States DO - http://dx.doi.org/10.1002/2013GL059051 ER - TY - CPAPER T1 - Passivity of Technetium Waste Forms Exposed to Various Aqueous Environments T2 - 2014 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2014) AN - 1518616432; 6286922 JF - 2014 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2014) AU - Kolman, David AU - Taylor, Christopher AU - Goff, George AU - Jarvinen, Gordon AU - Czerwinski, Kenneth AU - Cisneros, Mike Y1 - 2014/03/09/ PY - 2014 DA - 2014 Mar 09 KW - Technetium KW - Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518616432?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2014%29&rft.atitle=Passivity+of+Technetium+Waste+Forms+Exposed+to+Various+Aqueous+Environments&rft.au=Kolman%2C+David%3BTaylor%2C+Christopher%3BGoff%2C+George%3BJarvinen%2C+Gordon%3BCzerwinski%2C+Kenneth%3BCisneros%2C+Mike&rft.aulast=Kolman&rft.aufirst=David&rft.date=2014-03-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://events.nace.org/conferences/C2014/images_welcome/C2014FinalProgram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - JOUR T1 - A new fracture material model for simulating damage and moment tensor descriptions of simulated explosion sources for source physics experiments (SPE) AN - 1840618135; 2015-120356 JF - Seismological Research Letters AU - Rougier, E AU - Yang, X AU - Knight, E E AU - Patton, H J AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 418 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - models KW - fractures KW - experimental studies KW - moment tensors KW - underground space KW - seismicity KW - explosions KW - damage KW - seismic sources KW - simulation KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840618135?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=A+new+fracture+material+model+for+simulating+damage+and+moment+tensor+descriptions+of+simulated+explosion+sources+for+source+physics+experiments+%28SPE%29&rft.au=Rougier%2C+E%3BYang%2C+X%3BKnight%2C+E+E%3BPatton%2C+H+J%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Rougier&rft.aufirst=E&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=418&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - damage; experimental studies; explosions; fractures; models; moment tensors; seismic sources; seismicity; simulation; underground space ER - TY - JOUR T1 - Ambient noise tomography of the Katmai volcanic complex, Alaska AN - 1828846135; 2015-120449 JF - Seismological Research Letters AU - Lemon, S AU - Thurber, C H AU - Haney, M M AU - Syracuse, E AU - Zhang, H AU - Zeng, X AU - Prejean, S G AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 437 EP - 438 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - tomography KW - three-dimensional models KW - seismicity KW - velocity structure KW - Katmai KW - Alaska KW - arrays KW - noise KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846135?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Ambient+noise+tomography+of+the+Katmai+volcanic+complex%2C+Alaska&rft.au=Lemon%2C+S%3BThurber%2C+C+H%3BHaney%2C+M+M%3BSyracuse%2C+E%3BZhang%2C+H%3BZeng%2C+X%3BPrejean%2C+S+G%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Lemon&rft.aufirst=S&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=437&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Alaska; arrays; Katmai; noise; seismicity; three-dimensional models; tomography; United States; velocity structure ER - TY - JOUR T1 - Examining large and small earthquakes in the Costa Rica subduction zone to probe temporal and spatial megathrust heterogeneity AN - 1828846073; 2015-120352 JF - Seismological Research Letters AU - Bilek, S L AU - Rotman, H AU - Phillips, W S AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 417 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - subduction zones KW - Costa Rica KW - stress KW - subduction KW - seamounts KW - spatial variations KW - rupture KW - plate tectonics KW - thrust faults KW - seismicity KW - main shocks KW - Cocos Plate KW - tectonics KW - ocean floors KW - heterogeneity KW - earthquakes KW - Central America KW - seismotectonics KW - Nicoya Peninsula KW - faults KW - 18:Solid-earth geophysics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846073?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Examining+large+and+small+earthquakes+in+the+Costa+Rica+subduction+zone+to+probe+temporal+and+spatial+megathrust+heterogeneity&rft.au=Bilek%2C+S+L%3BRotman%2C+H%3BPhillips%2C+W+S%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Bilek&rft.aufirst=S&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=417&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Central America; Cocos Plate; Costa Rica; earthquakes; faults; heterogeneity; main shocks; Nicoya Peninsula; ocean floors; plate tectonics; rupture; seamounts; seismicity; seismotectonics; spatial variations; stress; subduction; subduction zones; tectonics; thrust faults ER - TY - JOUR T1 - Nonlinear elasticity and slow dynamics observed at the Factor Building (UCLA-California) by processing continuous recordings AN - 1828846071; 2015-120391 JF - Seismological Research Letters AU - Gueguen, Philippe AU - Roux, P AU - Johnson, P A AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 426 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - technology KW - elasticity KW - seismicity KW - damage KW - buildings KW - seismic response KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846071?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Nonlinear+elasticity+and+slow+dynamics+observed+at+the+Factor+Building+%28UCLA-California%29+by+processing+continuous+recordings&rft.au=Gueguen%2C+Philippe%3BRoux%2C+P%3BJohnson%2C+P+A%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Gueguen&rft.aufirst=Philippe&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=426&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - buildings; damage; earthquakes; elasticity; instruments; seismic response; seismicity; technology ER - TY - JOUR T1 - Hydrodynamic modeling of the near-source environment at a jointed site AN - 1828845279; 2015-120355 JF - Seismological Research Letters AU - Bradley, C R AU - Steedman, D S AU - Rougier, E AU - Knight, E E AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 418 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - models KW - plutonic rocks KW - seismicity KW - explosions KW - igneous rocks KW - granites KW - coupling KW - seismic sources KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828845279?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Hydrodynamic+modeling+of+the+near-source+environment+at+a+jointed+site&rft.au=Bradley%2C+C+R%3BSteedman%2C+D+S%3BRougier%2C+E%3BKnight%2C+E+E%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Bradley&rft.aufirst=C&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=418&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - coupling; explosions; granites; igneous rocks; models; plutonic rocks; seismic sources; seismicity ER - TY - JOUR T1 - Implications for chemical/nuclear equivalence from observations and hydrodynamic calculations AN - 1828845271; 2015-120358 JF - Seismological Research Letters AU - Patton, H L AU - Rougier, E AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 418 EP - 419 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - models KW - plutonic rocks KW - seismicity KW - explosions KW - igneous rocks KW - granites KW - hydrodynamics KW - observations KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828845271?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Implications+for+chemical%2Fnuclear+equivalence+from+observations+and+hydrodynamic+calculations&rft.au=Patton%2C+H+L%3BRougier%2C+E%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Patton&rft.aufirst=H&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=418&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - explosions; granites; hydrodynamics; igneous rocks; models; observations; plutonic rocks; seismicity ER - TY - JOUR T1 - Slip characteristics of the deep portion of the San Andreas Fault inferred from low-frequency earthquakes AN - 1819899196; 2015-120404 JF - Seismological Research Letters AU - Wu, C AU - Guyer, R A AU - Trugman, D T AU - Shelly, D R AU - Johnson, P A AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 428 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - California KW - seismicity KW - San Andreas Fault KW - tectonics KW - frequency KW - lower crust KW - earthquakes KW - seismotectonics KW - faults KW - crust KW - 19:Seismology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819899196?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Slip+characteristics+of+the+deep+portion+of+the+San+Andreas+Fault+inferred+from+low-frequency+earthquakes&rft.au=Wu%2C+C%3BGuyer%2C+R+A%3BTrugman%2C+D+T%3BShelly%2C+D+R%3BJohnson%2C+P+A%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Wu&rft.aufirst=C&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=428&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - California; crust; earthquakes; faults; frequency; lower crust; San Andreas Fault; seismicity; seismotectonics; tectonics; United States ER - TY - JOUR T1 - An analysis of repeating explosions using seismoacoustic data AN - 1800395760; 2016-054914 JF - Seismological Research Letters AU - Morton, E AU - Arrowsmith, S J AU - Marcillo, O AU - Whitaker, R AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 540 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - experimental studies KW - technology KW - seismicity KW - explosions KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800395760?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=An+analysis+of+repeating+explosions+using+seismoacoustic+data&rft.au=Morton%2C+E%3BArrowsmith%2C+S+J%3BMarcillo%2C+O%3BWhitaker%2C+R%3BAnonymous&rft.aulast=Morton&rft.aufirst=E&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=540&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - Seismological Society of America 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - experimental studies; explosions; instruments; seismicity; technology ER - TY - JOUR T1 - Acoustic signatures of different explosive-detonator configurations in small HE explosions AN - 1800395684; 2016-054913 JF - Seismological Research Letters AU - Marcillo, O AU - Arrowsmith, S J AU - Morton, E AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 540 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - technology KW - seismicity KW - explosions KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800395684?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Acoustic+signatures+of+different+explosive-detonator+configurations+in+small+HE+explosions&rft.au=Marcillo%2C+O%3BArrowsmith%2C+S+J%3BMorton%2C+E%3BAnonymous&rft.aulast=Marcillo&rft.aufirst=O&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=540&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - Seismological Society of America 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - explosions; instruments; seismicity; technology ER - TY - JOUR T1 - Broadband synthetic seismograms for M9 Cascadia earthquakes using 3D simulations AN - 1800392847; 2016-054818 JF - Seismological Research Letters AU - Frankel, A AU - Phillips-Alonge, K AU - Stephenson, W AU - Delorey, Andrew AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 520 EP - 521 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - seismograms KW - Washington KW - three-dimensional models KW - finite difference analysis KW - magnitude KW - correlation KW - Tualatin Basin KW - simulation KW - Tacoma Basin KW - Oregon KW - rupture KW - Seattle Basin KW - Portland Basin KW - Cascadia subduction zone KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392847?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Broadband+synthetic+seismograms+for+M9+Cascadia+earthquakes+using+3D+simulations&rft.au=Frankel%2C+A%3BPhillips-Alonge%2C+K%3BStephenson%2C+W%3BDelorey%2C+Andrew%3BAnonymous&rft.aulast=Frankel&rft.aufirst=A&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=520&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - Seismological Society of America 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Cascadia subduction zone; correlation; earthquakes; finite difference analysis; magnitude; Oregon; Portland Basin; rupture; Seattle Basin; seismograms; simulation; Tacoma Basin; three-dimensional models; Tualatin Basin; United States; Washington ER - TY - JOUR T1 - Application of advanced multivariate inversion techniques to the western US AN - 1800392830; 2016-054731 JF - Seismological Research Letters AU - Maceira, M AU - Ammon, C J AU - Chai, C AU - Herrmann, R B AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 502 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - upper mantle KW - technology KW - statistical analysis KW - mantle KW - anomalies KW - subduction KW - depth KW - models KW - plate tectonics KW - seismicity KW - multivariate analysis KW - Western U.S. KW - earthquakes KW - crust KW - 19:Seismology KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392830?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Application+of+advanced+multivariate+inversion+techniques+to+the+western+US&rft.au=Maceira%2C+M%3BAmmon%2C+C+J%3BChai%2C+C%3BHerrmann%2C+R+B%3BAnonymous&rft.aulast=Maceira&rft.aufirst=M&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=502&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - Seismological Society of America 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - anomalies; crust; depth; earthquakes; mantle; models; multivariate analysis; plate tectonics; seismicity; statistical analysis; subduction; technology; United States; upper mantle; Western U.S. ER - TY - JOUR T1 - The response of elastic systems in the Earth to dynamic perturbations AN - 1800392662; 2016-054743 JF - Seismological Research Letters AU - Delorey, A A AU - Chao, K AU - Uchida, N AU - Obara, K AU - Johnson, P A AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 504 EP - 505 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - Tohoku-Oki earthquake 2011 KW - seismicity KW - elastic properties KW - magnitude KW - temporal distribution KW - earthquakes KW - crust KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392662?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=The+response+of+elastic+systems+in+the+Earth+to+dynamic+perturbations&rft.au=Delorey%2C+A+A%3BChao%2C+K%3BUchida%2C+N%3BObara%2C+K%3BJohnson%2C+P+A%3BAnonymous&rft.aulast=Delorey&rft.aufirst=A&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=504&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - Seismological Society of America 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - crust; earthquakes; elastic properties; magnitude; seismicity; temporal distribution; Tohoku-Oki earthquake 2011 ER - TY - JOUR T1 - Joint inversion for Kilauea Volcano with an edge-preserving constraint AN - 1800392464; 2016-054734 JF - Seismological Research Letters AU - Lin, Y AU - Syracuse, E AU - Maceira, M AU - Larmat, C AU - Zhang, H AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 502 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - receiver functions KW - technology KW - Hawaii Island KW - geophysical surveys KW - Hawaii County Hawaii KW - geophysical methods KW - Hawaii KW - East Pacific Ocean Islands KW - information management KW - seismic methods KW - noise KW - data management KW - velocity structure KW - Oceania KW - surveys KW - tectonics KW - Polynesia KW - Kilauea KW - seismotectonics KW - 16:Structural geology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392464?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Joint+inversion+for+Kilauea+Volcano+with+an+edge-preserving+constraint&rft.au=Lin%2C+Y%3BSyracuse%2C+E%3BMaceira%2C+M%3BLarmat%2C+C%3BZhang%2C+H%3BAnonymous&rft.aulast=Lin&rft.aufirst=Y&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=502&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - Seismological Society of America 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - data management; East Pacific Ocean Islands; geophysical methods; geophysical surveys; Hawaii; Hawaii County Hawaii; Hawaii Island; information management; Kilauea; noise; Oceania; Polynesia; receiver functions; seismic methods; seismotectonics; surveys; technology; tectonics; United States; velocity structure ER - TY - JOUR T1 - Calibration of the seismic network at the Hawaiian Volcano Observatory; improvements to locations and magnitudes AN - 1800391287; 2016-054963 JF - Seismological Research Letters AU - Thelen, W A AU - Carmichael, Joshua D AU - Murray, Kyle AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 551 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - technology KW - Hawaii Island KW - Hawaii County Hawaii KW - magnitude KW - Hawaii KW - East Pacific Ocean Islands KW - calibration KW - seismicity KW - Oceania KW - Hawaiian Volcano Observatory KW - Polynesia KW - seismic networks KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800391287?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Calibration+of+the+seismic+network+at+the+Hawaiian+Volcano+Observatory%3B+improvements+to+locations+and+magnitudes&rft.au=Thelen%2C+W+A%3BCarmichael%2C+Joshua+D%3BMurray%2C+Kyle%3BAnonymous&rft.aulast=Thelen&rft.aufirst=W&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=551&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - Seismological Society of America 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - calibration; earthquakes; East Pacific Ocean Islands; Hawaii; Hawaii County Hawaii; Hawaii Island; Hawaiian Volcano Observatory; instruments; magnitude; Oceania; Polynesia; seismic networks; seismicity; technology; United States ER - TY - JOUR T1 - Structural heterogeneity at the SPE site revealed through combined P-wave travel times and sub-band Rg phase velocites AN - 1756506804; 2015-120521 JF - Seismological Research Letters AU - Rowe, C A AU - Patton, H J AU - Yang, X AU - Larmat, C S AU - Coblentz, D D Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 452 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - P-waves KW - body waves KW - geophones KW - technology KW - guided waves KW - geophysical methods KW - elastic waves KW - short-period waves KW - Rayleigh waves KW - seismic methods KW - surface waves KW - velocity structure KW - traveltime KW - Rg-waves KW - seismic waves KW - heterogeneity KW - instruments KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506804?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Structural+heterogeneity+at+the+SPE+site+revealed+through+combined+P-wave+travel+times+and+sub-band+Rg+phase+velocites&rft.au=Rowe%2C+C+A%3BPatton%2C+H+J%3BYang%2C+X%3BLarmat%2C+C+S%3BCoblentz%2C+D+D&rft.aulast=Rowe&rft.aufirst=C&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=452&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; elastic waves; geophones; geophysical methods; guided waves; heterogeneity; instruments; P-waves; Rayleigh waves; Rg-waves; seismic methods; seismic waves; short-period waves; surface waves; technology; traveltime; velocity structure ER - TY - JOUR T1 - Examining apparent stress in microseismicity along the Costa Rican and southern Nicaragua segments of the Middle America Trench AN - 1756506428; 2015-120489 JF - Seismological Research Letters AU - Rothman, H M M AU - Bilek, S L AU - Phillips, W S Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 446 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - East Pacific KW - Northeast Pacific KW - Middle America Trench KW - southern Nicaragua KW - seismic moment KW - Costa Rica KW - stress KW - subduction KW - Nicaragua KW - plate tectonics KW - seismicity KW - North Pacific KW - Pacific Ocean KW - earthquakes KW - Central America KW - Nicoya Peninsula KW - crust KW - 18:Solid-earth geophysics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506428?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Examining+apparent+stress+in+microseismicity+along+the+Costa+Rican+and+southern+Nicaragua+segments+of+the+Middle+America+Trench&rft.au=Rothman%2C+H+M+M%3BBilek%2C+S+L%3BPhillips%2C+W+S&rft.aulast=Rothman&rft.aufirst=H+M&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=446&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - Central America; Costa Rica; crust; earthquakes; East Pacific; Middle America Trench; Nicaragua; Nicoya Peninsula; North Pacific; Northeast Pacific; Pacific Ocean; plate tectonics; seismic moment; seismicity; southern Nicaragua; stress; subduction ER - TY - JOUR T1 - Time-dependent moment tensors of the first three source physics experiments explosions AN - 1756506406; 2015-120515 JF - Seismological Research Letters AU - Yang, X AU - Patton, H J AU - Rowe, C A AU - Larmat, T C Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 451 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - P-waves KW - body waves KW - geophones KW - experimental studies KW - technology KW - explosions KW - geophysical methods KW - Green function KW - elastic waves KW - seismic sources KW - seismic methods KW - moment tensors KW - traveltime KW - seismic waves KW - instruments KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506406?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Time-dependent+moment+tensors+of+the+first+three+source+physics+experiments+explosions&rft.au=Yang%2C+X%3BPatton%2C+H+J%3BRowe%2C+C+A%3BLarmat%2C+T+C&rft.aulast=Yang&rft.aufirst=X&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=451&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; elastic waves; experimental studies; explosions; geophones; geophysical methods; Green function; instruments; moment tensors; P-waves; seismic methods; seismic sources; seismic waves; technology; traveltime ER - TY - JOUR T1 - High frequency network discrimination using MLE source spectra from global amplitude tomography AN - 1756506358; 2015-120523 JF - Seismological Research Letters AU - Phillips, W S AU - Fisk, M D AU - Stead, R J AU - Begnaud, M L AU - Yang, X AU - Ballard, S Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 453 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - tomography KW - P-waves KW - body waves KW - technology KW - explosions KW - geophysical methods KW - elastic waves KW - seismic methods KW - seismic waves KW - earthquakes KW - S-waves KW - instruments KW - amplitude KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=High+frequency+network+discrimination+using+MLE+source+spectra+from+global+amplitude+tomography&rft.au=Phillips%2C+W+S%3BFisk%2C+M+D%3BStead%2C+R+J%3BBegnaud%2C+M+L%3BYang%2C+X%3BBallard%2C+S&rft.aulast=Phillips&rft.aufirst=W&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=453&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - amplitude; body waves; earthquakes; elastic waves; explosions; geophysical methods; instruments; P-waves; S-waves; seismic methods; seismic waves; technology; tomography ER - TY - JOUR T1 - 3D modeling of Rg wave propagation on geophone lines recording the Source Physics Experiment AN - 1756506354; 2015-120520 JF - Seismological Research Letters AU - Larmat, C S AU - Rowe, C A AU - Coblentz, D D AU - Patton, H J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 452 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - geophones KW - experimental studies KW - three-dimensional models KW - guided waves KW - explosions KW - geophysical methods KW - elastic waves KW - short-period waves KW - seismic sources KW - Rayleigh waves KW - two-dimensional models KW - seismic methods KW - surface waves KW - Rg-waves KW - propagation KW - seismic waves KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506354?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=3D+modeling+of+Rg+wave+propagation+on+geophone+lines+recording+the+Source+Physics+Experiment&rft.au=Larmat%2C+C+S%3BRowe%2C+C+A%3BCoblentz%2C+D+D%3BPatton%2C+H+J&rft.aulast=Larmat&rft.aufirst=C&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=452&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - elastic waves; experimental studies; explosions; geophones; geophysical methods; guided waves; propagation; Rayleigh waves; Rg-waves; seismic methods; seismic sources; seismic waves; short-period waves; surface waves; three-dimensional models; two-dimensional models ER - TY - JOUR T1 - 3D modeling of full waveform propagation to evaluate site effects on design ground motions at LANL AN - 1752579006; 2016-000946 JF - Seismological Research Letters AU - Larmat, C S AU - Miller, T A AU - Gable, C W AU - Lee, R C AU - Freymuller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 499 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - three-dimensional models KW - waveforms KW - New Mexico KW - Los Alamos County New Mexico KW - Los Alamos National Laboratory KW - seismic response KW - spectral element method KW - seismicity KW - ground motion KW - propagation KW - Pajarito Fault KW - earthquakes KW - faults KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752579006?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=3D+modeling+of+full+waveform+propagation+to+evaluate+site+effects+on+design+ground+motions+at+LANL&rft.au=Larmat%2C+C+S%3BMiller%2C+T+A%3BGable%2C+C+W%3BLee%2C+R+C%3BFreymuller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Larmat&rft.aufirst=C&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=499&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - earthquakes; faults; ground motion; Los Alamos County New Mexico; Los Alamos National Laboratory; New Mexico; Pajarito Fault; propagation; seismic response; seismicity; spectral element method; three-dimensional models; United States; waveforms ER - TY - JOUR T1 - Characterization of recent large earthquakes in Asia from backprojection imaging of regional seismic data AN - 1752578044; 2016-000904 JF - Seismological Research Letters AU - Euler, G G AU - Randall, G E AU - Hartse, H E AU - Freymuller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 490 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - models KW - imagery KW - technology KW - seismicity KW - magnitude KW - characterization KW - Asia KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578044?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Characterization+of+recent+large+earthquakes+in+Asia+from+backprojection+imaging+of+regional+seismic+data&rft.au=Euler%2C+G+G%3BRandall%2C+G+E%3BHartse%2C+H+E%3BFreymuller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Euler&rft.aufirst=G&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=490&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Asia; characterization; earthquakes; imagery; magnitude; models; seismicity; technology ER - TY - JOUR T1 - A study of the potential for induced seismicity resulting from C02 injection at Kimberlina, southern San Joaquin Valley, California AN - 1752575914; 2016-000897 JF - Seismological Research Letters AU - Bradley, C R AU - Lee, R C AU - Coblentz, D C AU - Wilson, Jen E AU - Stone, I P AU - Freymuller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 488 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - San Joaquin Valley KW - geologic hazards KW - statistical analysis KW - injection KW - prediction KW - carbon dioxide KW - California KW - Kern County California KW - gas injection KW - seismicity KW - Kimberlina California KW - seismic risk KW - natural hazards KW - ground motion KW - risk assessment KW - probability KW - induced earthquakes KW - earthquakes KW - 19:Seismology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752575914?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=A+study+of+the+potential+for+induced+seismicity+resulting+from+C02+injection+at+Kimberlina%2C+southern+San+Joaquin+Valley%2C+California&rft.au=Bradley%2C+C+R%3BLee%2C+R+C%3BCoblentz%2C+D+C%3BWilson%2C+Jen+E%3BStone%2C+I+P%3BFreymuller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Bradley&rft.aufirst=C&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=488&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - California; carbon dioxide; earthquakes; gas injection; geologic hazards; ground motion; induced earthquakes; injection; Kern County California; Kimberlina California; natural hazards; prediction; probability; risk assessment; San Joaquin Valley; seismic risk; seismicity; statistical analysis; United States ER - TY - JOUR T1 - Time-lapse walkaway vertical seismic profile monitoring for CO (sub 2) injection at the SACROC enhanced oil recovery field; a case study AN - 1645572010; 2015-004486 AB - Geologic carbon storage involves large-scale injections of carbon dioxide into underground geologic formations. Changes in reservoir properties resulting from CO (sub 2) injection and migration can be characterized using monitoring methods with time-lapse seismic data. To achieve economical monitoring, vertical seismic profile (VSP) data are often acquired to survey the local injection area. We investigated the capability of walkaway VSP monitoring for CO (sub 2) injection into an enhanced oil recovery field at SACROC, West Texas. VSP data sets were acquired in 2008 and 2009, and CO (sub 2) injection took place after the first data acquisition. Because the receivers were located above the injection zone, only reflection data contain the information from the reservoir. Qualitative comparison between reverse-time migration images at different times revealed vertical shifts of the reflectors" center, indicating the presence of velocity changes. We examined two methods to quantify the changes in velocity: standard full-waveform inversion (FWI) and image-domain wavefield tomography (IDWT). FWI directly inverts seismic waveforms for velocity models. IDWT inverts for the time-lapse velocity changes by matching the baseline and time-lapse migration images. We found that, for the constrained geometry of VSP surveys, the IDWT result was significantly more consistent with a localized change in velocity as expected from a few months of CO (sub 2) injection. A synthetic example was used to verify the result from the field data. By contrast, FWI failed to provide quantitative information about the volumetric velocity changes because of the survey geometry and data frequency content. JF - Geophysics AU - Yang, Di AU - Malcolm, Alison AU - Fehler, Michael AU - Huang, Lianjie Y1 - 2014/03// PY - 2014 DA - March 2014 SP - B51 EP - B61 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 79 IS - 2 SN - 0016-8033, 0016-8033 KW - United States KW - tomography KW - geophysical surveys KW - data acquisition KW - data processing KW - oil and gas fields KW - reservoir rocks KW - carbon dioxide KW - vertical seismic profiles KW - time-lapse methods KW - seismic profiles KW - monitoring KW - carbon sequestration KW - well logs KW - Scurry County Texas KW - geophysical methods KW - Texas KW - enhanced recovery KW - resistivity KW - wave fields KW - porosity KW - seismic methods KW - case studies KW - SACROC Project KW - gas injection KW - surveys KW - geophysical profiles KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645572010?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysics&rft.atitle=Time-lapse+walkaway+vertical+seismic+profile+monitoring+for+CO+%28sub+2%29+injection+at+the+SACROC+enhanced+oil+recovery+field%3B+a+case+study&rft.au=Yang%2C+Di%3BMalcolm%2C+Alison%3BFehler%2C+Michael%3BHuang%2C+Lianjie&rft.aulast=Yang&rft.aufirst=Di&rft.date=2014-03-01&rft.volume=79&rft.issue=2&rft.spage=B51&rft.isbn=&rft.btitle=&rft.title=Geophysics&rft.issn=00168033&rft_id=info:doi/10.1190%2Fgeo2013-0274.1 L2 - http://library.seg.org/journal/gpysa7 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 27 N1 - PubXState - OK N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Continuously Published N1 - Last updated - 2015-01-15 N1 - CODEN - GPYSA7 N1 - SubjectsTermNotLitGenreText - carbon dioxide; carbon sequestration; case studies; data acquisition; data processing; enhanced recovery; gas injection; geophysical methods; geophysical profiles; geophysical surveys; monitoring; oil and gas fields; porosity; reservoir rocks; resistivity; SACROC Project; Scurry County Texas; seismic methods; seismic profiles; surveys; Texas; time-lapse methods; tomography; United States; vertical seismic profiles; wave fields; well logs DO - http://dx.doi.org/10.1190/geo2013-0274.1 ER - TY - JOUR T1 - Sources of error and the statistical formulation of M (sub S) ; m (sub b) seismic event screening analysis AN - 1542643927; 2014-046996 AB - The Comprehensive Nuclear-Test-Ban Treaty (CTBT), a global ban on nuclear explosions, is currently in a ratification phase. Under the CTBT, an International Monitoring System (IMS) of seismic, hydroacoustic, infrasonic and radionuclide sensors is operational, and the data from the IMS is analysed by the International Data Centre (IDC). The IDC provides CTBT signatories basic seismic event parameters and a screening analysis indicating whether an event exhibits explosion characteristics (for example, shallow depth). An important component of the screening analysis is a statistical test of the null hypothesis H (sub 0) : explosion characteristics using empirical measurements of seismic energy (magnitudes). The established magnitude used for event size is the body-wave magnitude (denoted m (sub b) ) computed from the initial segment of a seismic waveform. IDC screening analysis is applied to events with m (sub b) greater than 3.5. The Rayleigh wave magnitude (denoted M (sub S) ) is a measure of later arriving surface wave energy. Magnitudes are measurements of seismic energy that include adjustments (physical correction model) for path and distance effects between event and station. Relative to m (sub b) , earthquakes generally have a larger M (sub S) magnitude than explosions. This article proposes a hypothesis test (screening analysis) using M (sub S) and m (sub b) that expressly accounts for physical correction model inadequacy in the standard error of the test statistic. With this hypothesis test formulation, the 2009 Democratic Peoples Republic of Korea announced nuclear weapon test fails to reject the null hypothesis H (sub 0) : explosion characteristics. Copyright 2014 Springer Basel and 2013 Springer Basel (outside the USA) JF - Pure and Applied Geophysics AU - Anderson, D N AU - Patton, H J AU - Taylor, S R AU - Bonner, J L AU - Selby, N D Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 537 EP - 547 PB - Birkhaeuser, Basel VL - 171 IS - 3-5 SN - 0033-4553, 0033-4553 KW - P-waves KW - Far East KW - North Korea KW - elastic waves KW - waveforms KW - seismic sources KW - surface waves KW - International Monitoring System KW - errors KW - nuclear explosions KW - Asia KW - body waves KW - guided waves KW - explosions KW - statistical analysis KW - magnitude KW - Korea KW - Rayleigh waves KW - noise KW - seismic waves KW - corrections KW - seismic networks KW - seismic energy KW - earthquakes KW - S-waves KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643927?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Pure+and+Applied+Geophysics&rft.atitle=Sources+of+error+and+the+statistical+formulation+of+M+%28sub+S%29+%3B+m+%28sub+b%29+seismic+event+screening+analysis&rft.au=Anderson%2C+D+N%3BPatton%2C+H+J%3BTaylor%2C+S+R%3BBonner%2C+J+L%3BSelby%2C+N+D&rft.aulast=Anderson&rft.aufirst=D&rft.date=2014-03-01&rft.volume=171&rft.issue=3-5&rft.spage=537&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-012-0627-9 L2 - http://link.springer.de/link/service/journals/00024/index.htm LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 21 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2014-07-04 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - Asia; body waves; Comprehensive Test Ban Treaty; corrections; earthquakes; elastic waves; errors; explosions; Far East; guided waves; International Monitoring System; Korea; magnitude; noise; North Korea; nuclear explosions; P-waves; Rayleigh waves; S-waves; seismic energy; seismic networks; seismic sources; seismic waves; statistical analysis; surface waves; waveforms DO - http://dx.doi.org/10.1007/s00024-012-0627-9 ER - TY - JOUR T1 - Sources of error model and progress metrics for acoustic/infrasonic analysis; location estimation AN - 1542643803; 2014-047000 AB - How well can we locate events using infrasound? This question has obvious implications for the use of infrasound within the context of nuclear explosion monitoring, and can be used to inform decision makers on the capability and limitations of infrasound as a sensing modality. This paper attempts to answer this question in the context of regional networks by quantifying current capability and estimating future capability using an example regional network in Utah. This example is contrasted with a sparse network over a large geographical region (representative of the IMS network). As a metric, we utilize the location precision, a measure of the total geographic area in which an event may occur at a 95 % confidence level. Our results highlight the relative importance of backazimuth and arrival time constraints under different scenarios (dense vs. sparse networks), and quantify the precision capability of the Utah network under different scenarios. The final section of this paper outlines the research and development required to achieve the estimated future location precision capability. Copyright 2014 Springer Basel and 2012 Springer Basel AG JF - Pure and Applied Geophysics AU - Arrowsmith, Stephen J AU - Norris, David AU - Whitaker, Rod AU - Anderson, Dale Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 587 EP - 597 PB - Birkhaeuser, Basel VL - 171 IS - 3-5 SN - 0033-4553, 0033-4553 KW - United States KW - monitoring KW - explosions KW - atmosphere KW - decision-making KW - seismic sources KW - models KW - International Monitoring System KW - errors KW - focus KW - Utah KW - infrasound KW - seismic networks KW - nuclear explosions KW - earthquakes KW - acoustical waves KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643803?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Pure+and+Applied+Geophysics&rft.atitle=Sources+of+error+model+and+progress+metrics+for+acoustic%2Finfrasonic+analysis%3B+location+estimation&rft.au=Arrowsmith%2C+Stephen+J%3BNorris%2C+David%3BWhitaker%2C+Rod%3BAnderson%2C+Dale&rft.aulast=Arrowsmith&rft.aufirst=Stephen&rft.date=2014-03-01&rft.volume=171&rft.issue=3-5&rft.spage=587&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-012-0576-3 L2 - http://link.springer.de/link/service/journals/00024/index.htm LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 29 N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2014-07-04 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - acoustical waves; atmosphere; Comprehensive Test Ban Treaty; decision-making; earthquakes; errors; explosions; focus; infrasound; International Monitoring System; models; monitoring; nuclear explosions; seismic networks; seismic sources; United States; Utah DO - http://dx.doi.org/10.1007/s00024-012-0576-3 ER - TY - JOUR T1 - How to invert multi-band, regional phase amplitudes for 2-D attenuation and source parameters; tests using the USArray AN - 1542643733; 2014-046992 AB - We inverted for laterally varying attenuation, absolute site terms, moments and apparent stress using over 460,000 Lg amplitudes recorded by the USArray for frequencies between 0.5 and 16 Hz. Corner frequencies of Wells, Nevada, aftershocks, obtained by independent analysis of coda spectral ratios, controlled the tradeoff between attenuation and stress, while independently determined moments from St. Louis University and the University of California constrained absolute levels. The quality factor, Q, was low for coastal regions and interior volcanic and tectonic areas, and high for stable regions such as the Great Plains, and Colorado and Columbia Plateaus. Q increased with frequency, and the rate of increase correlated inversely with 1-Hz Q, with highest rates in low-Q tectonic regions, and lowest rates in high-Q stable areas. Moments matched independently determined moments with a scatter of 0.2 NM. Apparent stress ranged from below 0.01 to above 1 MPa, with means of 0.1 MPa for smaller events, and 0.3 MPa for larger events. Stress was observed to be spatially coherent in some areas; for example, stress was lower along the San Andreas fault through central and northern California, and higher in the Walker Lane, and for isolated sequences such as Wells. Variance reduction relative to 1-D models ranged from 50 to 90 % depending on band and inversion method. Parameterizing frequency dependent Q as a power law produced little misfit relative to a collection of independent, multi-band Q models, and performed better than the omega-square source parameterization in that sense. Amplitude residuals showed modest, but regionally coherent patterns that varied from event to event, even between those with similar source mechanisms, indicating a combination of focal mechanism, and near source propagation effects played a role. An exception was the Wells mainshock, which produced dramatic amplitude patterns due to its directivity, and was thus excluded from the inversions. The 2-D Q plus absolute site models can be used for high accuracy, broad area source spectra, magnitude and yield estimation, and, in combination with models for all regional phases, can be used to improve discrimination, in particular for intermediate bands that allow coverage to be extended beyond that available for high frequency P-to-S discriminants. Copyright 2014 Springer Basel and 2013 Springer (outside the USA) JF - Pure and Applied Geophysics AU - Phillips, W Scott AU - Mayeda, Kevin M AU - Malagnini, Luca Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 469 EP - 484 PB - Birkhaeuser, Basel VL - 171 IS - 3-5 SN - 0033-4553, 0033-4553 KW - United States KW - power law KW - one-dimensional models KW - Lg-waves KW - data processing KW - Wells Nevada KW - elastic waves KW - Walker Lane KW - California KW - attenuation KW - surface waves KW - Q KW - Great Plains KW - propagation KW - Nevada KW - North America KW - USArray KW - Colorado Plateau KW - guided waves KW - seismic moment KW - Elko County Nevada KW - stress KW - inverse problem KW - aftershocks KW - San Andreas Fault KW - main shocks KW - Columbia Plateau KW - seismic waves KW - seismic networks KW - earthquakes KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643733?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Pure+and+Applied+Geophysics&rft.atitle=How+to+invert+multi-band%2C+regional+phase+amplitudes+for+2-D+attenuation+and+source+parameters%3B+tests+using+the+USArray&rft.au=Phillips%2C+W+Scott%3BMayeda%2C+Kevin+M%3BMalagnini%2C+Luca&rft.aulast=Phillips&rft.aufirst=W&rft.date=2014-03-01&rft.volume=171&rft.issue=3-5&rft.spage=469&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-013-0646-1 L2 - http://link.springer.de/link/service/journals/00024/index.htm LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 50 N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2014-07-04 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - aftershocks; amplitude; attenuation; California; Colorado Plateau; Columbia Plateau; data processing; earthquakes; elastic waves; Elko County Nevada; Great Plains; guided waves; inverse problem; Lg-waves; main shocks; Nevada; North America; one-dimensional models; power law; propagation; Q; San Andreas Fault; seismic moment; seismic networks; seismic waves; stress; surface waves; United States; USArray; Walker Lane; Wells Nevada DO - http://dx.doi.org/10.1007/s00024-013-0646-1 ER - TY - JOUR T1 - The least bad option? Extending the nuclear umbrella to the Middle East AN - 1531431504; 4565612 AB - This article examines the merits of extending the U.S. nuclear deterrent to the Middle East. It begins by looking at past practices of such an extension before delving into the overall issues presented by providing such a security guarantee. This article then looks at a brief survey of some of the regional issues facing a nuclear extension before considering the P-5 states and their concerns. Reprinted by permission of Taylor & Francis Ltd. JF - Comparative strategy AU - Saunders, Emily Cura AU - Fearey, Bryan L AD - Claremont Graduate University ; Los Alamos National Laboratory Y1 - 2014/03// PY - 2014 DA - Mar 2014 SP - 122 EP - 130 VL - 33 IS - 2 SN - 0149-5933, 0149-5933 KW - Political Science KW - Nuclear safety KW - Nuclear testing KW - Nuclear weapons KW - Surveys KW - Deterrence KW - U.S.A. KW - Middle East KW - National security UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1531431504?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aibss&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Comparative+strategy&rft.atitle=The+least+bad+option%3F+Extending+the+nuclear+umbrella+to+the+Middle+East&rft.au=Saunders%2C+Emily+Cura%3BFearey%2C+Bryan+L&rft.aulast=Saunders&rft.aufirst=Emily&rft.date=2014-03-01&rft.volume=33&rft.issue=2&rft.spage=122&rft.isbn=&rft.btitle=&rft.title=Comparative+strategy&rft.issn=01495933&rft_id=info:doi/10.1080%2F01495933.2014.897117 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2014-06-02 N1 - Last updated - 2014-06-03 N1 - SubjectsTermNotLitGenreText - 8777 8782 13504 13501 1304 7805 3198 1077; 3469 8782 13504 13501 1304 7805 3198 1077; 8528; 8782 13504 13501 1304 7805 3198 1077; 8775 11229; 12429; 254; 433 293 14 DO - http://dx.doi.org/10.1080/01495933.2014.897117 ER - TY - JOUR T1 - Feedbacks between coupled subglacial hydrology and glacier dynamics AN - 1529794055; 2014-037021 AB - On most glaciers and ice sheet outlets the majority of motion is due to basal slip, a combination of basal sliding and bed deformation. The importance of basal water in controlling sliding is well established, with increased sliding generally related to high basal water pressure, but the details of the interactions between the ice and water systems has not received much study when there is coupling between the systems. Here we use coupled subglacial hydrology and ice dynamics models within the Community Ice Sheet Model to investigate feedbacks between the ice and water systems. The dominant feedback we find is negative: sliding over bedrock bumps opens additional cavity space, which lowers water pressure and, in turn, sliding. We also find two small positive feedbacks: basal melt increases through frictional heat during sliding, which raises water pressure, and strain softening of basal ice during localized speedup causes cavities to close more quickly and maintain higher water pressures. Our coupled modeling demonstrates that a sustained input of surface water to a distributed drainage system can lead to a speedup event that decays even in the absence of channelization, due to increased capacity of the system through opening of cavities, which is enhanced through the sliding-opening feedback. We find that the negative feedback resulting from sliding-opening is robust across a wide range of parameter values. However, our modeling also argues that subglacial channelization is required to terminate speedup events over timescales that are commensurate with observations of late summer slowdown on mountain glaciers. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Earth Surface AU - Hoffman, Matthew AU - Price, Stephen Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 414 EP - 436 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 3 SN - 2169-9003, 2169-9003 KW - hydrology KW - pressure KW - subglacial processes KW - glaciers KW - ice sheets KW - deglaciation KW - climate change KW - temperature KW - ice movement KW - climate effects KW - glacial geology KW - meltwater KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529794055?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.atitle=Feedbacks+between+coupled+subglacial+hydrology+and+glacier+dynamics&rft.au=Hoffman%2C+Matthew%3BPrice%2C+Stephen&rft.aulast=Hoffman&rft.aufirst=Matthew&rft.date=2014-03-01&rft.volume=119&rft.issue=3&rft.spage=414&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.issn=21699003&rft_id=info:doi/10.1002%2F2013JF002943 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9011/issues?year=2013 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - climate change; climate effects; deglaciation; glacial geology; glaciers; hydrology; ice movement; ice sheets; meltwater; pressure; subglacial processes; temperature DO - http://dx.doi.org/10.1002/2013JF002943 ER - TY - JOUR T1 - The Atlantic Multidecadal Oscillation as a dominant factor of oceanic influence on climate AN - 1524411746; 19625497 AB - A multiple linear regression analysis of global annual mean near-surface air temperature (1900-2012) using the known radiative forcing and the El Nino-Southern Oscillation index as explanatory variables account for 89% of the observed temperature variance. When the Atlantic Multidecadal Oscillation (AMO) index is added to the set of explanatory variables, the fraction of accounted for temperature variance increases to 94%. The anthropogenic effects account for about two thirds of the post-1975 global warming with one third being due to the positive phase of the AMO. In comparison, the Coupled Models Intercomparison Project Phase 5 (CMIP5) ensemble mean accounts for 87% of the observed global mean temperature variance. Some of the CMIP5 models mimic the AMO-like oscillation by a strong aerosol effect. These models simulate the twentieth century AMO-like cycle with correct timing in each individual simulation. An inverse structural analysis suggests that these models generally overestimate the greenhouse gases-induced warming, which is then compensated by an overestimate of anthropogenic aerosol cooling. JF - Geophysical Research Letters AU - Chylek, Petr AU - Klett, James D AU - Lesins, Glen AU - Dubey, Manvendra K AU - Hengartner, Nicolas AD - Space and Remote Sensing, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 1689 EP - 1697 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 41 IS - 5 SN - 0094-8276, 0094-8276 KW - Pollution Abstracts; Sustainability Science Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - AMO KW - global temperature KW - regression analysis KW - Arctic KW - Atmospheric pollution models KW - Climate change KW - Structural analysis KW - Anthropogenic factors KW - Man-induced effects KW - Air temperature KW - Radiative forcing KW - Volcanic activity KW - Regression analysis KW - Ocean-atmosphere system KW - Oceanic influences on climate KW - Marine KW - Mean temperatures KW - Aerosols KW - Temperature KW - Volcanoes KW - Simulation KW - Greenhouse effect KW - A, Atlantic KW - Southern Oscillation KW - Numerical simulations KW - El Nino-Southern Oscillation event KW - Global warming KW - Greenhouse gases KW - Q2 09243:Structure, mechanics and thermodynamics KW - P 0000:AIR POLLUTION KW - M3 1010:Issues in Sustainable Development KW - M2 551.588:Environmental Influences (551.588) KW - O 2070:Meteorology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524411746?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=The+Atlantic+Multidecadal+Oscillation+as+a+dominant+factor+of+oceanic+influence+on+climate&rft.au=Chylek%2C+Petr%3BKlett%2C+James+D%3BLesins%2C+Glen%3BDubey%2C+Manvendra+K%3BHengartner%2C+Nicolas&rft.aulast=Chylek&rft.aufirst=Petr&rft.date=2014-03-01&rft.volume=41&rft.issue=5&rft.spage=1689&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL059274 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Aerosols; Structural analysis; Climate change; Ocean-atmosphere system; Man-induced effects; Simulation; Greenhouse effect; Air temperature; Southern Oscillation; Mean temperatures; Atmospheric pollution models; Radiative forcing; Numerical simulations; Volcanic activity; El Nino-Southern Oscillation event; Regression analysis; Global warming; Oceanic influences on climate; Volcanoes; Anthropogenic factors; Temperature; Greenhouse gases; A, Atlantic; Marine DO - http://dx.doi.org/10.1002/2014GL059274 ER - TY - JOUR T1 - Structural analysis of asparaginyl endopeptidase reveals the activation mechanism and a reversible intermediate maturation stage. AN - 1504152486; 24407422 AB - Asparaginyl endopeptidase (AEP) is an endo/lysosomal cysteine endopeptidase with a preference for an asparagine residue at the P1 site and plays an important role in the maturation of toll-like receptors 3/7/9. AEP is known to undergo autoproteolytic maturation at acidic pH for catalytic activation. Here, we describe crystal structures of the AEP proenzyme and the mature forms of AEP. Structural comparisons between AEP and caspases revealed similarities in the composition of key residues and in the catalytic mechanism. Mutagenesis studies identified N44, R46, H150, E189, C191, S217/S218 and D233 as residues that are essential for the cleavage of the peptide substrate. During maturation, autoproteolytic cleavage of AEP's cap domain opens up access to the active site on the core domain. Unexpectedly, an intermediate autoproteolytic maturation stage was discovered at approximately pH 4.5 in which the partially activated AEP could be reversed back to its proenzyme form. This unique feature was confirmed by the crystal structure of AEPpH4.5 (AEP was matured at pH 4.5 and crystallized at pH 8.5), in which the broken peptide bonds were religated and the structure was transformed back to its proenzyme form. Additionally, the AEP inhibitor cystatin C could be digested by the fully activated AEP, but could not be digested by activated cathepsins. Thus, we demonstrate for the first time that cystatins may regulate the activity of AEP through substrate competition for the active site. JF - Cell research AU - Zhao, Lixia AU - Hua, Tian AU - Crowley, Christopher AU - Ru, Heng AU - Ni, Xiangmin AU - Shaw, Neil AU - Jiao, Lianying AU - Ding, Wei AU - Qu, Lu AU - Hung, Li-Wei AU - Huang, Wei AU - Liu, Lei AU - Ye, Keqiang AU - Ouyang, Songying AU - Cheng, Genhong AU - Liu, Zhi-Jie AD - 1] National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China [2] iHuman Institute, ShanghaiTech University, Shanghai 201210, China. ; National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China. ; Department of Microbiology, Immunology and Molecular Genetics, University of California Los Angeles, Los Angeles, CA 90095, USA. ; Physics Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. ; iHuman Institute, ShanghaiTech University, Shanghai 201210, China. ; Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China. ; Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA. Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 344 EP - 358 VL - 24 IS - 3 KW - Cystatin C KW - 0 KW - Enzyme Precursors KW - Cathepsins KW - EC 3.4.- KW - Cysteine Endopeptidases KW - EC 3.4.22.- KW - asparaginylendopeptidase KW - EC 3.4.22.34 KW - Index Medicus KW - Animals KW - Enzyme Precursors -- metabolism KW - Hydrogen-Ion Concentration KW - Humans KW - HEK293 Cells KW - Catalytic Domain KW - Enzyme Precursors -- chemistry KW - Mice KW - Amino Acid Sequence KW - Cathepsins -- metabolism KW - Molecular Dynamics Simulation KW - Protein Binding KW - Binding Sites KW - Mutagenesis, Site-Directed KW - Cystatin C -- chemistry KW - Sequence Alignment KW - Cystatin C -- metabolism KW - Molecular Sequence Data KW - Crystallography, X-Ray KW - Substrate Specificity KW - Protein Structure, Tertiary KW - Enzyme Precursors -- genetics KW - Cysteine Endopeptidases -- metabolism KW - Cysteine Endopeptidases -- chemistry KW - Cysteine Endopeptidases -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1504152486?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Cell+research&rft.atitle=Structural+analysis+of+asparaginyl+endopeptidase+reveals+the+activation+mechanism+and+a+reversible+intermediate+maturation+stage.&rft.au=Zhao%2C+Lixia%3BHua%2C+Tian%3BCrowley%2C+Christopher%3BRu%2C+Heng%3BNi%2C+Xiangmin%3BShaw%2C+Neil%3BJiao%2C+Lianying%3BDing%2C+Wei%3BQu%2C+Lu%3BHung%2C+Li-Wei%3BHuang%2C+Wei%3BLiu%2C+Lei%3BYe%2C+Keqiang%3BOuyang%2C+Songying%3BCheng%2C+Genhong%3BLiu%2C+Zhi-Jie&rft.aulast=Zhao&rft.aufirst=Lixia&rft.date=2014-03-01&rft.volume=24&rft.issue=3&rft.spage=344&rft.isbn=&rft.btitle=&rft.title=Cell+research&rft.issn=1748-7838&rft_id=info:doi/10.1038%2Fcr.2014.4 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-04-21 N1 - Date created - 2014-03-03 N1 - Date revised - 2017-02-17 N1 - Genetic sequence - 4NOM; PDB; 4NOL; 4NOK; 4NOJ N1 - SuppNotes - Cited By: J Biol Chem. 1999 Jul 2;274(27):19195-203 [10383426] FEBS Lett. 1998 Dec 28;441(3):361-5 [9891971] Nucleic Acids Res. 2005 Jul 1;33(Web Server issue):W89-93 [15980588] Immunol Rev. 2005 Oct;207:229-41 [16181340] FEBS Lett. 2007 Apr 3;581(7):1417-24 [17350006] Protein Expr Purif. 2007 Jun;53(2):396-403 [17363272] FASEB J. 2007 Oct;21(12):3029-41 [17522380] J Biol Chem. 2007 Oct 5;282(40):29721-8 [17698845] Nat Immunol. 2008 Dec;9(12):1407-14 [18931679] Nature. 2008 Dec 4;456(7222):658-62 [18820679] Immunity. 2009 Nov 20;31(5):737-48 [19879164] Acta Crystallogr D Biol Crystallogr. 2010 Feb;66(Pt 2):213-21 [20124702] Acta Crystallogr D Biol Crystallogr. 2010 Apr;66(Pt 4):486-501 [20383002] Nucleic Acids Res. 2010 Jul;38(Web Server issue):W545-9 [20457744] FASEB J. 2011 Feb;25(2):497-504 [20923965] J Exp Med. 2011 Apr 11;208(4):643-51 [21402738] Acta Crystallogr Sect F Struct Biol Cryst Commun. 2012 Jan 1;68(Pt 1):24-31 [22232165] Exp Mol Pathol. 2012 Feb;92(1):27-32 [22001602] Acta Crystallogr D Biol Crystallogr. 2012 May;68(Pt 5):521-30 [22525750] J Mol Med (Berl). 2012 Jul;90(7):837-46 [22307521] Biosci Rep. 2012 Aug;32(4):401-11 [22607239] Plant Cell. 2012 Jul;24(7):2765-78 [22822203] Immunol Lett. 2013 Jan;149(1-2):85-7 [23183093] J Virol. 2013 Jun;87(12):6829-39 [23576501] Proc Natl Acad Sci U S A. 2013 May 28;110(22):9054-9 [23569220] Proc Natl Acad Sci U S A. 2013 Jul 2;110(27):10940-5 [23776206] Proc Natl Acad Sci U S A. 2009 Jan 13;106(2):468-73 [19106291] Immunity. 2000 Apr;12(4):391-8 [10795737] Biochem J. 2000 Dec 1;352 Pt 2:327-34 [11085925] Biophys J. 2001 Jun;80(6):2946-53 [11371467] Biol Chem. 2001 May;382(5):777-83 [11517930] Plant Cell Physiol. 2002 Feb;43(2):143-51 [11867693] Biol Chem. 2002 Jul-Aug;383(7-8):1205-14 [12437107] J Biol Chem. 2003 Apr 11;278(15):13286-93 [12554742] J Biol Chem. 2003 Oct 3;278(40):38980-90 [12860980] Gene. 1989 Jul 15;79(2):325-32 [2529167] Science. 1991 Oct 4;254(5028):51-8 [1925561] Nature. 1994 Jul 28;370(6487):270-5 [8035875] FEBS Lett. 1995 Sep 25;372(2-3):169-72 [7556662] J Biol Chem. 1997 Mar 21;272(12):8090-8 [9065484] Biochemistry. 1998 Mar 24;37(12):4071-9 [9521728] Biochem J. 1998 Oct 1;335 ( Pt 1):111-7 [9742219] Nature. 1998 Dec 17;396(6712):695-9 [9872320] Acta Crystallogr D Biol Crystallogr. 2005 May;61(Pt 5):520-7 [15858261] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/cr.2014.4 ER - TY - CPAPER T1 - Selecting Essential Information for Biosurveillance T2 - 2014 Annual Meeting of the American Association for the Advancement of Science (AAAS 2014) AN - 1510099366; 6280360 JF - 2014 Annual Meeting of the American Association for the Advancement of Science (AAAS 2014) AU - Deshpande, Alina Y1 - 2014/02/13/ PY - 2014 DA - 2014 Feb 13 KW - Science UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510099366?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2014%29&rft.atitle=Selecting+Essential+Information+for+Biosurveillance&rft.au=Deshpande%2C+Alina&rft.aulast=Deshpande&rft.aufirst=Alina&rft.date=2014-02-13&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aaas.confex.com/aaas/2014/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-24 N1 - Last updated - 2014-03-26 ER - TY - JOUR T1 - Effect of the core/shell interface on auger recombination evaluated by single-quantum-dot spectroscopy. AN - 1499151564; 24397307 AB - Previous single-particle spectroscopic studies of colloidal quantum dots have indicated a significant spread in biexciton lifetimes across an ensemble of nominally identical nanocrystals. It has been speculated that in addition to dot-to-dot variation in physical dimensions, this spread is contributed to by variations in the structure of the quantum dot interface, which controls the shape of the confinement potential. Here, we directly evaluate the effect of the composition of the core-shell interface on single- and multiexciton dynamics via side-by-side measurements of individual core-shell CdSe/CdS nanocrystals with a sharp versus smooth (graded) interface. To realize the latter type of structures we incorporate a CdSexS1-x alloy layer of controlled composition and thickness between the CdSe core and the CdS shell. We observe that while having essentially no effect on single-exciton decay, the interfacial alloy layer leads to a systematic increase in biexciton lifetimes, which correlates with the increase in the biexciton emission efficiency, as inferred from two-photon correlation measurements. These observations provide direct experimental evidence that in addition to the size of the quantum dot, its interfacial properties also significantly affect the rate of Auger recombination, which governs biexciton decay. These findings help rationalize previous observations of a significant heterogeneity in the biexciton lifetimes across similarly sized quantum dots and should facilitate the development of "Auger-recombination-free" colloidal nanostructures for a range of applications from lasers and light-emitting diodes to photodetectors and solar cells. JF - Nano letters AU - Park, Young-Shin AU - Bae, Wan Ki AU - Padilha, Lazaro A AU - Pietryga, Jeffrey M AU - Klimov, Victor I AD - Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States. Y1 - 2014/02/12/ PY - 2014 DA - 2014 Feb 12 SP - 396 EP - 402 VL - 14 IS - 2 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1499151564?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nano+letters&rft.atitle=Effect+of+the+core%2Fshell+interface+on+auger+recombination+evaluated+by+single-quantum-dot+spectroscopy.&rft.au=Park%2C+Young-Shin%3BBae%2C+Wan+Ki%3BPadilha%2C+Lazaro+A%3BPietryga%2C+Jeffrey+M%3BKlimov%2C+Victor+I&rft.aulast=Park&rft.aufirst=Young-Shin&rft.date=2014-02-12&rft.volume=14&rft.issue=2&rft.spage=396&rft.isbn=&rft.btitle=&rft.title=Nano+letters&rft.issn=1530-6992&rft_id=info:doi/10.1021%2Fnl403289w LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-03-30 N1 - Date created - 2014-02-12 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/nl403289w ER - TY - JOUR T1 - Taxila LBM: a parallel, modular lattice Boltzmann framework for simulating pore-scale flow in porous media AN - 1832621952; 691388-3 AB - The lattice Boltzmann method is a popular tool for pore-scale simulation of flow. This is likely due to the ease of including complex geometries such as porous media and representing multiphase and multifluid flows. Many advancements, including multiple relaxation times, increased isotropy, and others have improved the accuracy and physical fidelity of the method. Additionally, the lattice Bolzmann method is computationally very efficient, thanks to the explicit nature of the algorithm and relatively large amount of local work. The combination of many algorithmic options and efficiency means that a software framework enabling the usage and comparison of these advancements on computers from laptops to large clusters has much to offer. In this paper, we introduce Taxila LBM, an open-source software framework for lattice Boltzmann simulations. We discuss the design of the framework and lay out the features available, including both methods in the literature and a few new enhancements which generalize methods to complex geometries. We discuss the trade-off of accuracy and performance in various methods, noting how the Taxila LBM makes it easy to perform these comparisons for real problems. And finally, we demonstrate a few common applications in pore-scale simulation, including the characterization of permeability of a Berea sandstone and analysis of multifluid flow in heterogenous micromodels. Copyright 2014 Springer International Publishing Switzerland and 2013 Springer Science+Business Media Dordrecht JF - Computational Geosciences AU - Coon, Ethan T AU - Porter, Mark L AU - Kang, Qinjun Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 17 EP - 27 PB - Springer, Dordrecht VL - 18 IS - 1 SN - 1420-0597, 1420-0597 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832621952?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computational+Geosciences&rft.atitle=Taxila+LBM%3A+a+parallel%2C+modular+lattice+Boltzmann+framework+for+simulating+pore-scale+flow+in+porous+media&rft.au=Coon%2C+Ethan+T%3BPorter%2C+Mark+L%3BKang%2C+Qinjun&rft.aulast=Coon&rft.aufirst=Ethan&rft.date=2014-02-01&rft.volume=18&rft.issue=1&rft.spage=17&rft.isbn=&rft.btitle=&rft.title=Computational+Geosciences&rft.issn=14200597&rft_id=info:doi/10.1007%2Fs10596-013-9379-6 L2 - http://www.springerlink.com/content/101744/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1007/s10596-013-9379-6 ER - TY - JOUR T1 - Results from a high resolution pre-industrial climate simulation using CESM AN - 1803777080; 2016-061185 JF - Ocean Sciences Meeting AU - Maltrud, M AU - Veneziani, M AU - McClean, J AU - Evans, K AU - Branstetter, M AU - Sharp, Jonathan AU - Briscoe, Mel AU - Itsweire, Eric Y1 - 2014/02// PY - 2014 DA - February 2014 EP - Abstract 16876 PB - American Geophysical Union (AGU), [varies] VL - 17 KW - Cenozoic KW - high-resolution methods KW - fluctuations KW - Quaternary KW - Community Earth System Model KW - upper Holocene KW - simulation KW - paleoclimatology KW - Holocene KW - climate KW - variations KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803777080?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ocean+Sciences+Meeting&rft.atitle=Results+from+a+high+resolution+pre-industrial+climate+simulation+using+CESM&rft.au=Maltrud%2C+M%3BVeneziani%2C+M%3BMcClean%2C+J%3BEvans%2C+K%3BBranstetter%2C+M%3BSharp%2C+Jonathan%3BBriscoe%2C+Mel%3BItsweire%2C+Eric&rft.aulast=Maltrud&rft.aufirst=M&rft.date=2014-02-01&rft.volume=17&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Ocean+Sciences+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 2014 ocean sciences meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-07-14 N1 - CODEN - #07653 N1 - SubjectsTermNotLitGenreText - Cenozoic; climate; Community Earth System Model; fluctuations; high-resolution methods; Holocene; paleoclimatology; Quaternary; simulation; upper Holocene; variations ER - TY - JOUR T1 - Lack of spatiotemporal localization of foreshocks before the 1999 M (sub w) 7.1 Duzce, Turkey, earthquake AN - 1507175183; 2014-018597 AB - We use a matched-filter technique to detect small seismic events before the M (sub w) 7.1 Duzce earthquake that are not included in the regular catalog. The study employs extensive waveform dataset recorded by a 10-station fault zone array near the epicenter of the Duzce earthquake, deployed about three months before the event. We use 3134 earthquakes within 20 km of the Duzce epicenter listed in the local catalog as templates to scan through waveforms recorded within approximately 65 hours before the Duzce earthquake. The analysis reveals 262 newly detected events in this time interval, which is approximately 5 times more than the 55 events listed in the original catalog. Most of the events occur to the west of the Duzce epicenter, which was initiated between a more active western and relatively quite eastern fault segments. The results do not indicate a localizing foreshock process that accelerates in time and/or involves progressive concentration of activity around the mainshock hypocenter during the preceding 65 hour period. Instead, we find that the Duzce source region becomes less active during the approximately 20 hours immediately before the mainshock. Our results, together with other recent studies, suggest that progressive acceleration and localization of foreshocks around the mainshock epicenter is not a general phenomenon. JF - Bulletin of the Seismological Society of America AU - Wu, Chunquan AU - Meng, Xiaofeng AU - Peng, Zhigang AU - Ben-Zion, Yehuda Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 560 EP - 566 PB - Seismological Society of America, Berkeley, CA VL - 104 IS - 1 SN - 0037-1106, 0037-1106 KW - technology KW - geologic hazards KW - Duzce earthquake 1999 KW - magnitude KW - Turkey KW - information management KW - foreshocks KW - data management KW - seismicity KW - seismic risk KW - natural hazards KW - risk assessment KW - focus KW - Asia KW - earthquakes KW - Middle East KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1507175183?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Lack+of+spatiotemporal+localization+of+foreshocks+before+the+1999+M+%28sub+w%29+7.1+Duzce%2C+Turkey%2C+earthquake&rft.au=Wu%2C+Chunquan%3BMeng%2C+Xiaofeng%3BPeng%2C+Zhigang%3BBen-Zion%2C+Yehuda&rft.aulast=Wu&rft.aufirst=Chunquan&rft.date=2014-02-01&rft.volume=104&rft.issue=1&rft.spage=560&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120130140 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 27 N1 - PubXState - CA N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2014-03-14 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - Asia; data management; Duzce earthquake 1999; earthquakes; focus; foreshocks; geologic hazards; information management; magnitude; Middle East; natural hazards; risk assessment; seismic risk; seismicity; technology; Turkey DO - http://dx.doi.org/10.1785/0120130140 ER - TY - JOUR T1 - Near-source vertical and horizontal strong ground motion from the 20 April 2013 M (sub w) 6.8 Lushan earthquake in China AN - 1502291860; 2014-013005 JF - Seismological Research Letters AU - Xie, Junju AU - Li, Xiaojun AU - Wen, Zengping AU - Wu, Chunquan AU - Yao, Huajian AU - Peng, Zhigang Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 23 EP - 33 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 1 SN - 0895-0695, 0895-0695 KW - Far East KW - geologic hazards KW - Sichuan China KW - Lushan earthquake 2013 KW - reverse faults KW - spatial distribution KW - seismicity KW - building codes KW - seismic risk KW - buildings KW - propagation KW - Asia KW - faults KW - China KW - soils KW - vertical orientation KW - magnitude KW - rupture KW - strong motion KW - earthquake prediction KW - natural hazards KW - ground motion KW - risk assessment KW - lateral heterogeneity KW - seismic networks KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502291860?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Near-source+vertical+and+horizontal+strong+ground+motion+from+the+20+April+2013+M+%28sub+w%29+6.8+Lushan+earthquake+in+China&rft.au=Xie%2C+Junju%3BLi%2C+Xiaojun%3BWen%2C+Zengping%3BWu%2C+Chunquan%3BYao%2C+Huajian%3BPeng%2C+Zhigang&rft.aulast=Xie&rft.aufirst=Junju&rft.date=2014-02-01&rft.volume=85&rft.issue=1&rft.spage=23&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220130121 L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 37 N1 - PubXState - CA N1 - Document feature - illus. incl. 2 tables, geol. sketch maps N1 - Last updated - 2016-10-25 N1 - CODEN - EAQNAT N1 - SubjectsTermNotLitGenreText - Asia; building codes; buildings; China; earthquake prediction; earthquakes; Far East; faults; geologic hazards; ground motion; lateral heterogeneity; Lushan earthquake 2013; magnitude; natural hazards; propagation; reverse faults; risk assessment; rupture; seismic networks; seismic risk; seismicity; Sichuan China; soils; spatial distribution; strong motion; vertical orientation DO - http://dx.doi.org/10.1785/0220130121 ER - TY - JOUR T1 - In vivo chlorine and sodium MRI of rat brain at 21.1 T AN - 1500779820; 19282970 AB - (ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).Object: MR imaging of low-gamma nuclei at the ultrahigh magnetic field of 21.1 T provides a new opportunity for understanding a variety of biological processes. Among these, chlorine and sodium are attracting attention for their involvement in brain function and cancer development. Materials and methods: MRI of super(35)Cl and super(23)Na were performed and relaxation times were measured in vivo in normal rat (n = 3) and in rat with glioma (n = 3) at 21.1 T. The concentrations of both nuclei were evaluated using the center-out back-projection method. Results: T sub(1) relaxation curve of chlorine in normal rat head was fitted by bi-exponential function (T sub(1a) = 4.8 ms (0.7) T sub(1b) = 24.4 plus or minus 7 ms (0.3) and compared with sodium (T sub(1) = 41.4 ms). Free induction decays (FID) of chlorine and sodium in vivo were bi-exponential with similar rapidly decaying components of ... ms and ... ms, respectively. Effects of small acquisition matrix and bi-exponential FIDs were assessed for quantification of chlorine (33.2 mM) and sodium (44.4 mM) in rat brain. Conclusion: The study modeled a dramatic effect of the bi-exponential decay on MRI results. The revealed increased chlorine concentration in glioma (~1.5 times) relative to a normal brain correlates with the hypothesis asserting the importance of chlorine for tumor progression. JF - Magnetic Resonance Materials in Biology, Physics, and Medicine AU - Schepkin, Victor D AU - Elumalai, Malathy AU - Kitchen, Jason A AU - Qian, Chunqi AU - Gor'kov, Peter L AU - Brey, William W AD - National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, FL, 32310-4005, USA, schepkin@magnet.fsu.edu Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 63 EP - 70 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 27 IS - 1 SN - 0968-5243, 0968-5243 KW - Biotechnology and Bioengineering Abstracts KW - Sodium KW - Brain tumors KW - Magnetic fields KW - Head KW - Magnetic resonance imaging KW - Brain KW - Chlorine KW - N.M.R. KW - Glioma KW - Tumors KW - Attention KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1500779820?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Magnetic+Resonance+Materials+in+Biology%2C+Physics%2C+and+Medicine&rft.atitle=In+vivo+chlorine+and+sodium+MRI+of+rat+brain+at+21.1+T&rft.au=Schepkin%2C+Victor+D%3BElumalai%2C+Malathy%3BKitchen%2C+Jason+A%3BQian%2C+Chunqi%3BGor%27kov%2C+Peter+L%3BBrey%2C+William+W&rft.aulast=Schepkin&rft.aufirst=Victor&rft.date=2014-02-01&rft.volume=27&rft.issue=1&rft.spage=63&rft.isbn=&rft.btitle=&rft.title=Magnetic+Resonance+Materials+in+Biology%2C+Physics%2C+and+Medicine&rft.issn=09685243&rft_id=info:doi/10.1007%2Fs10334-013-0387-2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 26 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Brain tumors; Sodium; Magnetic fields; Head; Magnetic resonance imaging; Brain; Chlorine; N.M.R.; Tumors; Glioma; Attention DO - http://dx.doi.org/10.1007/s10334-013-0387-2 ER - TY - JOUR T1 - Engineering acidic Streptomyces rubiginosus D-xylose isomerase by rational enzyme design. AN - 1490773945; 24402330 AB - To maximize bioethanol production from lignocellulosic biomass, all sugars must be utilized. Yeast fermentation can be improved by introducing the d-xylose isomerase enzyme to convert the pentose sugar d-xylose, which cannot be fermented by Saccharomyces cerevisiae, into the fermentable ketose d-xylulose. The low activity of d-xylose isomerase, especially at the low pH required for optimal fermentation, limits its use. A rational enzyme engineering approach was undertaken, and seven amino acid positions were replaced to improve the activity of Streptomyces rubiginosus d-xylose isomerase towards its physiological substrate at pH values below 6. The active-site design was guided by mechanistic insights and the knowledge of amino acid protonation states at low pH obtained from previous joint X-ray/neutron crystallographic experiments. Tagging the enzyme with 6 or 12 histidine residues at the N-terminus resulted in a significant increase in the active-site affinity towards substrate at pH 5.8. Substituting an asparagine at position 215, which hydrogen bonded to the metal-bound Glu181 and Asp245, with an aspartate gave a variant with almost an order of magnitude lower KM than measured for the native enzyme, with a 4-fold increase in activity. Other studied variants showed similar (Asp57Asn, Glu186Gln/Asn215Asp), lower (Asp57His, Asn247Asp, Lys289His, Lys289Glu) or no (Gln256Asp, Asp287Asn, ΔAsp287) activity in acidic conditions relative to the native enzyme. JF - Protein engineering, design & selection : PEDS AU - Waltman, Mary Jo AU - Yang, Zamin Koo AU - Langan, Paul AU - Graham, David E AU - Kovalevsky, Andrey AD - Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 59 EP - 64 VL - 27 IS - 2 KW - Xylose KW - A1TA934AKO KW - Aldose-Ketose Isomerases KW - EC 5.3.1.- KW - xylose isomerase KW - EC 5.3.1.5 KW - Index Medicus KW - enzyme kinetics KW - protein engineering KW - site-directed mutagenesis KW - rational design KW - d-xylose isomerase KW - Models, Molecular KW - Catalytic Domain KW - Xylose -- metabolism KW - Protein Conformation KW - Streptomyces -- enzymology KW - Aldose-Ketose Isomerases -- genetics KW - Aldose-Ketose Isomerases -- chemistry KW - Aldose-Ketose Isomerases -- metabolism KW - Streptomyces -- genetics KW - Mutagenesis, Site-Directed -- methods KW - Streptomyces -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490773945?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Protein+engineering%2C+design+%26+selection+%3A+PEDS&rft.atitle=Engineering+acidic+Streptomyces+rubiginosus+D-xylose+isomerase+by+rational+enzyme+design.&rft.au=Waltman%2C+Mary+Jo%3BYang%2C+Zamin+Koo%3BLangan%2C+Paul%3BGraham%2C+David+E%3BKovalevsky%2C+Andrey&rft.aulast=Waltman&rft.aufirst=Mary&rft.date=2014-02-01&rft.volume=27&rft.issue=2&rft.spage=59&rft.isbn=&rft.btitle=&rft.title=Protein+engineering%2C+design+%26+selection+%3A+PEDS&rft.issn=1741-0134&rft_id=info:doi/10.1093%2Fprotein%2Fgzt062 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-08-29 N1 - Date created - 2014-01-17 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1093/protein/gzt062 ER - TY - JOUR T1 - Future climate warming increases Greenland ice sheet surface mass balance variability AN - 1645574061; 2015-003806 AB - The integrated surface mass balance (SMB) of the Greenland ice sheet (GrIS) has large interannual variability. Long-term future changes to this variability will affect GrIS dynamics, freshwater fluxes, regional oceanography, and detection of changes in ice volume trends. Here we analyze a simulated 1850-2100 GrIS SMB time series from the Community Earth System Model, currently the only global climate model that realistically simulates GrIS SMB. We find a significant increase in interannual integrated SMB variability over time, which we attribute primarily to a shift to a high-variability melt-dominated SMB regime due to GrIS ablation area growth. We find temporal increases to characteristic ablation and accumulation area-specific SMB variabilities to be of secondary importance. Since ablation area SMB variability is driven largely by variability in summer surface melt, variability in the climate processes regulating the energy fluxes that control melting will likely increasingly determine future GrIS SMB variability. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Fyke, Jeremy G AU - Vizcaino, Miren AU - Lipscomb, William AU - Price, Stephen Y1 - 2014/01/28/ PY - 2014 DA - 2014 Jan 28 SP - 470 EP - 475 PB - American Geophysical Union, Washington, DC VL - 41 IS - 2 SN - 0094-8276, 0094-8276 KW - annual variations KW - subglacial processes KW - Arctic region KW - Greenland ice sheet KW - global change KW - salinity KW - ice sheets KW - climate change KW - temperature KW - Greenland KW - melting KW - mass balance KW - volume KW - climate effects KW - glacial geology KW - global warming KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645574061?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Future+climate+warming+increases+Greenland+ice+sheet+surface+mass+balance+variability&rft.au=Fyke%2C+Jeremy+G%3BVizcaino%2C+Miren%3BLipscomb%2C+William%3BPrice%2C+Stephen&rft.aulast=Fyke&rft.aufirst=Jeremy&rft.date=2014-01-28&rft.volume=41&rft.issue=2&rft.spage=470&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2013GL058172 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 27 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-01-15 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - annual variations; Arctic region; climate change; climate effects; glacial geology; global change; global warming; Greenland; Greenland ice sheet; ice sheets; mass balance; melting; salinity; subglacial processes; temperature; volume DO - http://dx.doi.org/10.1002/2013GL058172 ER - TY - JOUR T1 - A habitable fluvio-lacustrine environment at Yellowknife Bay, Gale Crater, Mars AN - 1520104963; 2014-030206 AB - The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of an environment that would have been suited to support a martian biosphere founded on chemolithoautotrophy. This aqueous environment was characterized by neutral pH, low salinity, and variable redox states of both iron and sulfur species. Carbon, hydrogen, oxygen, sulfur, nitrogen, and phosphorus were measured directly as key biogenic elements; by inference, phosphorus is assumed to have been available. The environment probably had a minimum duration of hundreds to tens of thousands of years. These results highlight the biological viability of fluvial-lacustrine environments in the post-Noachian history of Mars. JF - Science AU - Grotzinger, John P AU - Sumner, D Y AU - Kah, L C AU - Stack, K AU - Gupta, S AU - Edgar, L A AU - Rubin, D AU - Lewis, K W AU - Schieber, J AU - Mangold, N AU - Milliken, R E AU - Conrad, P G AU - Des Marais, D J AU - Farmer, J D AU - Siebach, K AU - Calef, F, III AU - Hurowitz, J A AU - McLennan, S M AU - Ming, D W AU - Vaniman, D T AU - Crisp, J A AU - Vasavada, A AU - Edgett, K S AU - Malin, M AU - Blake, D F AU - Gellert, R AU - Mahaffy, P R AU - Wiens, R C AU - Maurice, S AU - Grant, J A AU - Wilson, S AU - Anderson, R C AU - Beegle, L AU - Arvidson, R E AU - Hallet, B AU - Sletten, R S AU - Rice, M S AU - Bell, J F, III AU - Griffes, J AU - Ehlmann, B L AU - Anderson, R B AU - Bristow, T F AU - Dietrich, W E AU - Dromart, G AU - Eigenbrode, Jennifer L AU - Fraeman, A AU - Hardgrove, C AU - Herkenhoff, K E AU - Jandura, L AU - Kocurek, G AU - Lee, S AU - Leshin, L A AU - Leveille, R AU - Limonadi, D AU - Maki, J AU - McCloskey, S AU - Meyer, M AU - Minitti, M AU - Newsom, H E AU - Oehler, D AU - Okon, A AU - Palucis, M AU - Parker, T AU - Rowland, S AU - Schmidt, M AU - Squyres, S W AU - Steele, A AU - Stolper, E M AU - Summons, R E AU - Treiman, A H AU - Williams, R AU - Yingst, R A Y1 - 2014/01/24/ PY - 2014 DA - 2014 Jan 24 SP - 388 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6169 SN - 0036-8075, 0036-8075 KW - Yellowknife Bay KW - Noachian KW - astrobiology KW - Mars KW - cosmochemistry KW - salinity KW - Gale Crater KW - terrestrial planets KW - planets KW - sedimentary rocks KW - paleoenvironment KW - habitability KW - biosphere KW - Curiosity Rover KW - lacustrine environment KW - chemical composition KW - geochemistry KW - fluvial environment KW - pH KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520104963?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science&rft.atitle=A+habitable+fluvio-lacustrine+environment+at+Yellowknife+Bay%2C+Gale+Crater%2C+Mars&rft.au=Grotzinger%2C+John+P%3BSumner%2C+D+Y%3BKah%2C+L+C%3BStack%2C+K%3BGupta%2C+S%3BEdgar%2C+L+A%3BRubin%2C+D%3BLewis%2C+K+W%3BSchieber%2C+J%3BMangold%2C+N%3BMilliken%2C+R+E%3BConrad%2C+P+G%3BDes+Marais%2C+D+J%3BFarmer%2C+J+D%3BSiebach%2C+K%3BCalef%2C+F%2C+III%3BHurowitz%2C+J+A%3BMcLennan%2C+S+M%3BMing%2C+D+W%3BVaniman%2C+D+T%3BCrisp%2C+J+A%3BVasavada%2C+A%3BEdgett%2C+K+S%3BMalin%2C+M%3BBlake%2C+D+F%3BGellert%2C+R%3BMahaffy%2C+P+R%3BWiens%2C+R+C%3BMaurice%2C+S%3BGrant%2C+J+A%3BWilson%2C+S%3BAnderson%2C+R+C%3BBeegle%2C+L%3BArvidson%2C+R+E%3BHallet%2C+B%3BSletten%2C+R+S%3BRice%2C+M+S%3BBell%2C+J+F%2C+III%3BGriffes%2C+J%3BEhlmann%2C+B+L%3BAnderson%2C+R+B%3BBristow%2C+T+F%3BDietrich%2C+W+E%3BDromart%2C+G%3BEigenbrode%2C+Jennifer+L%3BFraeman%2C+A%3BHardgrove%2C+C%3BHerkenhoff%2C+K+E%3BJandura%2C+L%3BKocurek%2C+G%3BLee%2C+S%3BLeshin%2C+L+A%3BLeveille%2C+R%3BLimonadi%2C+D%3BMaki%2C+J%3BMcCloskey%2C+S%3BMeyer%2C+M%3BMinitti%2C+M%3BNewsom%2C+H+E%3BOehler%2C+D%3BOkon%2C+A%3BPalucis%2C+M%3BParker%2C+T%3BRowland%2C+S%3BSchmidt%2C+M%3BSquyres%2C+S+W%3BSteele%2C+A%3BStolper%2C+E+M%3BSummons%2C+R+E%3BTreiman%2C+A+H%3BWilliams%2C+R%3BYingst%2C+R+A&rft.aulast=Grotzinger&rft.aufirst=John&rft.date=2014-01-24&rft.volume=343&rft.issue=6169&rft.spage=388&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1242777 L2 - http://www.sciencemag.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 100 N1 - PubXState - DC N1 - Document feature - illus. incl. strat. col., sketch maps N1 - SuppNotes - Full text available only online N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - astrobiology; biosphere; chemical composition; cosmochemistry; Curiosity Rover; fluvial environment; Gale Crater; geochemistry; habitability; lacustrine environment; Mars; Noachian; paleoenvironment; pH; planets; salinity; sedimentary rocks; terrestrial planets; Yellowknife Bay DO - http://dx.doi.org/10.1126/science.1242777 ER - TY - JOUR T1 - Elemental geochemistry of sedimentary rocks at Yellowknife Bay, Gale Crater, Mars AN - 1520103769; 2014-030208 AB - Sedimentary rocks examined by the Curiosity rover at Yellowknife Bay, Mars, were derived from sources that evolved from an approximately average martian crustal composition to one influenced by alkaline basalts. No evidence of chemical weathering is preserved, indicating arid, possibly cold, paleoclimates and rapid erosion and deposition. The absence of predicted geochemical variations indicates that magnetite and phyllosilicates formed by diagenesis under low-temperature, circumneutral pH, rock-dominated aqueous conditions. Analyses of diagenetic features (including concretions, raised ridges, and fractures) at high spatial resolution indicate that they are composed of iron- and halogen-rich components, magnesium-iron-chlorine-rich components, and hydrated calcium sulfates, respectively. Composition of a cross-cutting dike-like feature is consistent with sedimentary intrusion. The geochemistry of these sedimentary rocks provides further evidence for diverse depositional and diagenetic sedimentary environments during the early history of Mars. JF - Science AU - McLennan, S M AU - Anderson, R B AU - Bell, J F, III AU - Bridges, J C AU - Calef, F, III AU - Campbell, J L AU - Clark, B C AU - Clegg, S AU - Conrad, P G AU - Cousin, A AU - Des Marais, D J AU - Dromart, G AU - Dyar, M D AU - Edgar, L A AU - Ehlmann, B L AU - Fabre, C AU - Forni, O AU - Gasnault, O AU - Gellert, R AU - Gordon, S AU - Grant, J A AU - Grotzinger, John P AU - Gupta, S AU - Herkenhoff, K E AU - Hurowitz, J A AU - King, P L AU - Le Mouelic, S AU - Leshin, L A AU - Leveille, R AU - Lewis, K W AU - Mangold, N AU - Maurice, S AU - Ming, D W AU - Morris, R V AU - Nachon, M AU - Newsom, H E AU - Ollila, A M AU - Perrett, G M AU - Rice, M S AU - Schmidt, M E AU - Schwenzer, S P AU - Stack, K AU - Stolper, E M AU - Sumner, D Y AU - Treiman, A H AU - VanBommel, S AU - Vaniman, D T AU - Vasavada, A AU - Wiens, R C AU - Yingst, R A Y1 - 2014/01/24/ PY - 2014 DA - 2014 Jan 24 SP - 388 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6169 SN - 0036-8075, 0036-8075 KW - Yellowknife Bay KW - silicates KW - chemical weathering KW - erosion KW - Mars KW - weathering KW - variations KW - Gale Crater KW - exploration KW - terrestrial planets KW - planets KW - sedimentary rocks KW - mineral composition KW - diagenesis KW - Curiosity Rover KW - sheet silicates KW - chemical composition KW - geochemistry KW - 02C:Geochemistry of rocks, soils, and sediments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520103769?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science&rft.atitle=Elemental+geochemistry+of+sedimentary+rocks+at+Yellowknife+Bay%2C+Gale+Crater%2C+Mars&rft.au=McLennan%2C+S+M%3BAnderson%2C+R+B%3BBell%2C+J+F%2C+III%3BBridges%2C+J+C%3BCalef%2C+F%2C+III%3BCampbell%2C+J+L%3BClark%2C+B+C%3BClegg%2C+S%3BConrad%2C+P+G%3BCousin%2C+A%3BDes+Marais%2C+D+J%3BDromart%2C+G%3BDyar%2C+M+D%3BEdgar%2C+L+A%3BEhlmann%2C+B+L%3BFabre%2C+C%3BForni%2C+O%3BGasnault%2C+O%3BGellert%2C+R%3BGordon%2C+S%3BGrant%2C+J+A%3BGrotzinger%2C+John+P%3BGupta%2C+S%3BHerkenhoff%2C+K+E%3BHurowitz%2C+J+A%3BKing%2C+P+L%3BLe+Mouelic%2C+S%3BLeshin%2C+L+A%3BLeveille%2C+R%3BLewis%2C+K+W%3BMangold%2C+N%3BMaurice%2C+S%3BMing%2C+D+W%3BMorris%2C+R+V%3BNachon%2C+M%3BNewsom%2C+H+E%3BOllila%2C+A+M%3BPerrett%2C+G+M%3BRice%2C+M+S%3BSchmidt%2C+M+E%3BSchwenzer%2C+S+P%3BStack%2C+K%3BStolper%2C+E+M%3BSumner%2C+D+Y%3BTreiman%2C+A+H%3BVanBommel%2C+S%3BVaniman%2C+D+T%3BVasavada%2C+A%3BWiens%2C+R+C%3BYingst%2C+R+A&rft.aulast=McLennan&rft.aufirst=S&rft.date=2014-01-24&rft.volume=343&rft.issue=6169&rft.spage=388&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1244734 L2 - http://www.sciencemag.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 72 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Full text available only online N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - chemical composition; chemical weathering; Curiosity Rover; diagenesis; erosion; exploration; Gale Crater; geochemistry; Mars; mineral composition; planets; sedimentary rocks; sheet silicates; silicates; terrestrial planets; variations; weathering; Yellowknife Bay DO - http://dx.doi.org/10.1126/science.1244734 ER - TY - JOUR T1 - Prevalence of broadly neutralizing antibody responses during chronic HIV-1 infection AN - 1765970225; PQ0002559357 AB - Objective: Studies of neutralizing antibodies in HIV-1 infected individuals provide insights into the quality of the response that should be possible to elicit with vaccines and ways to design effective immunogens. Some individuals make high titres of exceptional broadly reactive neutralizing antibodies that are of particular interest; however, more modest responses may be a reasonable goal for vaccines. We performed a large cross-sectional study to determine the spectrum of neutralization potency and breadth that is seen during chronic HIV-1 infection. Design: Neutralization potency and breadth were assessed with genetically and geographically diverse panels of 205 chronic HIV-1 sera and 219 Env-pseudotyped viruses representing all major genetic subtypes of HIV-1. Methods: Neutralization was measured by using Tat-regulated luciferase reporter gene expression in TZM-bl cells. Serum-neutralizing activity was compared with a diverse set of human mAbs that are widely considered to be broadly neutralizing. Results: We observed a uniform continuum of responses, with most sera displaying some level of cross-neutralization, and approximately 50% of sera neutralizing more than 50% of viruses. Titres of neutralization (potency) were highly correlated with breadth. Many sera had breadth comparable to several of the less potent broadly neutralizing human mAbs. Conclusion: These results help clarify the spectrum of serum-neutralizing activity induced by HIV-1 infection and that should be possible to elicit with vaccines. Importantly, most people appear capable of making low to moderate titres of broadly neutralizing antibodies. Additional studies of these relatively common responses might provide insights for practical and feasible vaccine designs. JF - AIDS AU - Hraber, Peter AU - Seaman, Michael S AU - Bailer, Robert T AU - Mascola, John R AU - Montefiori, David C AU - Korber, Bette T AD - Theoretical Biology and Biophysics, Los Alamos National Laboratory, Los Alamos, New Mexico, monte@duke.edu Y1 - 2014/01/14/ PY - 2014 DA - 2014 Jan 14 SP - 163 EP - 169 PB - Lippincott Williams & Wilkins, Inc, 530 Walnut Street Philadelphia PA 19106-3621 United States VL - 28 IS - 2 SN - 0269-9370, 0269-9370 KW - Health & Safety Science Abstracts; Immunology Abstracts; Virology & AIDS Abstracts KW - HIV-1 KW - immunity KW - neutralizing antibodies KW - serum KW - vaccines KW - Acquired immune deficiency syndrome KW - Antibodies KW - Monoclonal antibodies KW - Reporter gene KW - Human immunodeficiency virus 1 KW - Viruses KW - Chronic infection KW - Vaccines KW - Infection KW - Neutralization KW - V 22360:AIDS and HIV KW - H 4000:Food and Drugs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765970225?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=AIDS&rft.atitle=Prevalence+of+broadly+neutralizing+antibody+responses+during+chronic+HIV-1+infection&rft.au=Hraber%2C+Peter%3BSeaman%2C+Michael+S%3BBailer%2C+Robert+T%3BMascola%2C+John+R%3BMontefiori%2C+David+C%3BKorber%2C+Bette+T&rft.aulast=Hraber&rft.aufirst=Peter&rft.date=2014-01-14&rft.volume=28&rft.issue=2&rft.spage=163&rft.isbn=&rft.btitle=&rft.title=AIDS&rft.issn=02699370&rft_id=info:doi/10.1097%2FQAD.0000000000000106 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Antibodies; Reporter gene; Monoclonal antibodies; Chronic infection; Vaccines; Acquired immune deficiency syndrome; Viruses; Infection; Neutralization; Human immunodeficiency virus 1 DO - http://dx.doi.org/10.1097/QAD.0000000000000106 ER - TY - JOUR T1 - Humic acid complexation of Th, Hf and Zr in ligand competition experiments; metal loading and pH effects AN - 1520103220; 2014-028165 AB - The mobility of metals in soils and subsurface aquifers is strongly affected by sorption and complexation with dissolved organic matter, oxyhydroxides, clay minerals, and inorganic ligands. Humic substances (HS) are organic macromolecules with functional groups that have a strong affinity for binding metals, such as actinides. Thorium, often studied as an analog for tetravalent actinides, has also been shown to strongly associate with dissolved and colloidal HS in natural waters. The effects of HS on the mobilization dynamics of actinides are of particular interest in risk assessment of nuclear waste repositories. Here, we present conditional equilibrium binding constants (K (sub c,MHA) ) of thorium, hafnium, and zirconium-humic acid complexes from ligand competition experiments using capillary electrophoresis coupled with ICP-MS (CE-ICP-MS). Equilibrium dialysis ligand exchange (EDLE) experiments using size exclusion via a 1000Da membrane were also performed to validate the CE-ICP-MS analysis. Experiments were performed at pH3.5-7 with solutions containing one tetravalent metal (Th, Hf, or Zr), Elliot soil humic acid (EHA) or Pahokee peat humic acid (PHA), and EDTA. CE-ICP-MS and EDLE experiments yielded nearly identical binding constants for the metal-humic acid complexes, indicating that both methods are appropriate for examining metal speciation at conditions lower than neutral pH. We find that tetravalent metals form strong complexes with humic acids, with K (sub c,MHA) several orders of magnitude above REE-humic complexes. Experiments were conducted at a range of dissolved HA concentrations to examine the effect of [HA]/[Th] molar ratio on K (sub c,MHA) . At low metal loading conditions (i.e. elevated [HA]/[Th] ratios) the ThHA binding constant reached values that were not affected by the relative abundance of humic acid and thorium. The importance of [HA]/[Th] molar ratios on constraining the equilibrium of MHA complexation is apparent when our estimated K (sub c,MHA) values attained at very low metal loading conditions are compared to existing literature data. Overall, experimental data suggest that the tetravalent transition metal/-actinide-humic acid complexation is important over a wide range of pH values, including mildly acidic conditions, and thus, these complexes should be included in speciation models. Abstract Copyright (2014) Elsevier, B.V. JF - Chemical Geology AU - Stern, Jennifer C AU - Foustoukos, Dionysis I AU - Sonke, Jeroen E AU - Salters, Vincent J M Y1 - 2014/01/10/ PY - 2014 DA - 2014 Jan 10 SP - 241 EP - 249 PB - Elsevier, Amsterdam VL - 363 SN - 0009-2541, 0009-2541 KW - silicates KW - electrophoresis KW - complexing KW - mass spectra KW - zirconium KW - bonding KW - humic acids KW - ligands KW - hafnium KW - chemical reactions KW - dialysis KW - oxides KW - valency KW - spectra KW - rare earths KW - trace elements KW - mobility KW - pH KW - experimental studies KW - solutes KW - clay minerals KW - ICP mass spectra KW - hydroxides KW - organic compounds KW - organic acids KW - humic substances KW - metals KW - mathematical methods KW - thorium KW - sheet silicates KW - actinides KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520103220?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Humic+acid+complexation+of+Th%2C+Hf+and+Zr+in+ligand+competition+experiments%3B+metal+loading+and+pH+effects&rft.au=Stern%2C+Jennifer+C%3BFoustoukos%2C+Dionysis+I%3BSonke%2C+Jeroen+E%3BSalters%2C+Vincent+J+M&rft.aulast=Stern&rft.aufirst=Jennifer&rft.date=2014-01-10&rft.volume=363&rft.issue=&rft.spage=241&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2013.11.001 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 69 N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-05-01 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - actinides; bonding; chemical reactions; clay minerals; complexing; dialysis; electrophoresis; experimental studies; hafnium; humic acids; humic substances; hydroxides; ICP mass spectra; ligands; mass spectra; mathematical methods; metals; mobility; organic acids; organic compounds; oxides; pH; rare earths; sheet silicates; silicates; solutes; spectra; thorium; trace elements; valency; zirconium DO - http://dx.doi.org/10.1016/j.chemgeo.2013.11.001 ER - TY - JOUR T1 - More mudballs; simulating primordial planetesimals as unconsolidated mixtures of mud and chondrules AN - 1849311158; 2016-108985 JF - Annual Meeting of the Meteoritical Society AU - Bland, P A AU - Travis, B J AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5295 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - plumes KW - stony meteorites KW - mantle KW - planetesimals KW - thermal history KW - simulation KW - metasomatism KW - meteorites KW - mud KW - melting KW - mixing KW - sediments KW - hydrothermal alteration KW - chondrites KW - accretion KW - numerical models KW - clastic sediments KW - carbonaceous chondrites KW - convection KW - porosity KW - aqueous alteration KW - chondrules KW - core KW - unconsolidated materials KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849311158?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=More+mudballs%3B+simulating+primordial+planetesimals+as+unconsolidated+mixtures+of+mud+and+chondrules&rft.au=Bland%2C+P+A%3BTravis%2C+B+J%3BAnonymous&rft.aulast=Bland&rft.aufirst=P&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5295.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - SuppNotes - Accessed May 10, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - accretion; aqueous alteration; carbonaceous chondrites; chondrites; chondrules; clastic sediments; convection; core; hydrothermal alteration; mantle; melting; metasomatism; meteorites; mixing; mud; numerical models; planetesimals; plumes; porosity; sediments; simulation; stony meteorites; thermal history; unconsolidated materials ER - TY - JOUR T1 - Clay and magnetite formation at Yellowknife Bay, Mars AN - 1849311032; 2016-109000 JF - Annual Meeting of the Meteoritical Society AU - Bridges, J C AU - Schwenzer, S P AU - Leveille, R AU - Westall, F AU - Wiens, R C AU - Mangold, N AU - Bristow, T AU - Edwards, P AU - Berger, G AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5344 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - olivine group KW - Mars KW - solution KW - Gale Crater KW - sedimentary rocks KW - olivine KW - Curiosity Rover KW - orthosilicates KW - oxides KW - heterogeneity KW - Yellowknife Bay KW - mudstone KW - secondary minerals KW - amorphous materials KW - saponite KW - Sheepbed Mudstone KW - clay minerals KW - terrestrial planets KW - nesosilicates KW - models KW - planets KW - diagenesis KW - Mars Science Laboratory KW - sheet silicates KW - clastic rocks KW - pore water KW - magnetite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849311032?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Clay+and+magnetite+formation+at+Yellowknife+Bay%2C+Mars&rft.au=Bridges%2C+J+C%3BSchwenzer%2C+S+P%3BLeveille%2C+R%3BWestall%2C+F%3BWiens%2C+R+C%3BMangold%2C+N%3BBristow%2C+T%3BEdwards%2C+P%3BBerger%2C+G%3BAnonymous&rft.aulast=Bridges&rft.aufirst=J&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5344.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 8 N1 - SuppNotes - Accessed on May 13, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - amorphous materials; clastic rocks; clay minerals; Curiosity Rover; diagenesis; Gale Crater; heterogeneity; magnetite; Mars; Mars Science Laboratory; models; mudstone; nesosilicates; olivine; olivine group; orthosilicates; oxides; planets; pore water; saponite; secondary minerals; sedimentary rocks; Sheepbed Mudstone; sheet silicates; silicates; solution; terrestrial planets; Yellowknife Bay ER - TY - JOUR T1 - Three-phase numerical model for subsurface hydrology in permafrost-affected regions (PFLOTRAN-ICE v1.0) AN - 1849302708; 2016-104810 AB - Degradation of near-surface permafrost due to changes in the climate is expected to impact the hydrological, ecological and biogeochemical responses of the Arctic tundra. From a hydrological perspective, it is important to understand the movement of the various phases of water (gas, liquid and ice) during the freezing and thawing of near-surface soils. We present a new non-isothermal, single-component (water), three-phase formulation that treats air as an inactive component. This single component model works well and produces similar results to a more complete and computationally demanding two-component (air, water) formulation, and is able to reproduce results of previously published laboratory experiments. A proof-of-concept implementation in the massively parallel subsurface flow and reactive transport code PFLOTRAN is summarized, and parallel performance of that implementation is demonstrated. When water vapor diffusion is considered, a large effect on soil moisture dynamics is seen, which is due to dependence of thermal conductivity on ice content. A large three-dimensional simulation (with around 6 million degrees of freedom) of seasonal freezing and thawing is also presented. JF - The Cryosphere (Online) AU - Karra, S AU - Painter, S L AU - Lichtner, P C Y1 - 2014 PY - 2014 DA - 2014 SP - 1935 EP - 1950 PB - Copernicus on behalf of the European Geosciences Union, Katlenburg-Lindau VL - 8 IS - 5 KW - methods KW - PFLOTRAN KW - soil dynamics KW - PFLOTRAN-ICE KW - permafrost KW - thermal conductivity KW - tundra KW - moisture KW - interlaboratory comparison KW - data processing KW - water vapor KW - freezing KW - simulation KW - temperature KW - ground water KW - transport KW - ice KW - heat flow KW - reactive transport KW - water content KW - ground-surface temperature KW - soils KW - liquid phase KW - hydrology KW - experimental studies KW - diffusion KW - numerical models KW - gaseous phase KW - Arctic region KW - fluid flow KW - equations KW - thawing KW - solid phase KW - computer programs KW - saturation KW - regional KW - frost action KW - parallel processing KW - seasonal variations KW - active layer KW - 23:Geomorphology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849302708?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Cryosphere+%28Online%29&rft.atitle=Three-phase+numerical+model+for+subsurface+hydrology+in+permafrost-affected+regions+%28PFLOTRAN-ICE+v1.0%29&rft.au=Karra%2C+S%3BPainter%2C+S+L%3BLichtner%2C+P+C&rft.aulast=Karra&rft.aufirst=S&rft.date=2014-01-01&rft.volume=8&rft.issue=5&rft.spage=1935&rft.isbn=&rft.btitle=&rft.title=The+Cryosphere+%28Online%29&rft.issn=1994-0424&rft_id=info:doi/ L2 - http://www.the-cryosphere.net/8/1935/2014/tc-8-1935-2014.pdf http://www.the-cryosphere.net/volumes_and_issues.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 44 N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - active layer; Arctic region; computer programs; data processing; diffusion; equations; experimental studies; fluid flow; freezing; frost action; gaseous phase; ground water; ground-surface temperature; heat flow; hydrology; ice; interlaboratory comparison; liquid phase; methods; moisture; numerical models; parallel processing; permafrost; PFLOTRAN; PFLOTRAN-ICE; reactive transport; regional; saturation; seasonal variations; simulation; soil dynamics; soils; solid phase; temperature; thawing; thermal conductivity; transport; tundra; water content; water vapor ER - TY - JOUR T1 - Evidence for phyllosilicate precursors in an aphanitic spherule from NWA 7533 AN - 1840621889; 2016-098319 JF - Annual Meeting of the Meteoritical Society AU - Humayun, M AU - Hewins, R H AU - Zanda, B AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5413 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - Northwest Africa Meteorites KW - volcanic rocks KW - stony meteorites KW - Martian meteorites KW - igneous rocks KW - enrichment KW - mass spectra KW - Mars KW - NWA 7533 KW - melts KW - meteorites KW - impact melts KW - basalts KW - spectra KW - chemical composition KW - aphanitic texture KW - spherules KW - textures KW - achondrites KW - weathering KW - clay minerals KW - terrestrial planets KW - ICP mass spectra KW - planets KW - Phyllosian KW - sheet silicates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621889?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Evidence+for+phyllosilicate+precursors+in+an+aphanitic+spherule+from+NWA+7533&rft.au=Humayun%2C+M%3BHewins%2C+R+H%3BZanda%2C+B%3BAnonymous&rft.aulast=Humayun&rft.aufirst=M&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5413.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 7 N1 - SuppNotes - Accessed on June 10, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - achondrites; aphanitic texture; basalts; chemical composition; clay minerals; enrichment; ICP mass spectra; igneous rocks; impact melts; Mars; Martian meteorites; mass spectra; melts; meteorites; Northwest Africa Meteorites; NWA 7533; Phyllosian; planets; sheet silicates; silicates; spectra; spherules; stony meteorites; terrestrial planets; textures; volcanic rocks; weathering ER - TY - JOUR T1 - Feldspar-bearing igneous rocks at Gale; a ChemCam campaign AN - 1832686898; 768620-51 JF - Annual Meeting of the Meteoritical Society AU - Sautter, V AU - Fabre, C AU - Toplis, M AU - Cousin, A AU - Wiens, R C AU - Gasnault, O AU - Forni, O AU - Mangold, N AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5237 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - vesicular texture KW - silicates KW - ChemCam instrument KW - Noachian KW - textures KW - igneous rocks KW - differentiation KW - Mars KW - felsic composition KW - variations KW - Gale Crater KW - terrestrial planets KW - planets KW - alkali feldspar KW - porphyritic texture KW - framework silicates KW - feldspar group KW - zoning KW - crust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832686898?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Feldspar-bearing+igneous+rocks+at+Gale%3B+a+ChemCam+campaign&rft.au=Sautter%2C+V%3BFabre%2C+C%3BToplis%2C+M%3BCousin%2C+A%3BWiens%2C+R+C%3BGasnault%2C+O%3BForni%2C+O%3BMangold%2C+N%3BAnonymous&rft.aulast=Sautter&rft.aufirst=V&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5237.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 9 N1 - SuppNotes - Accessed on Aug. 4, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - alkali feldspar; ChemCam instrument; crust; differentiation; feldspar group; felsic composition; framework silicates; Gale Crater; igneous rocks; Mars; Noachian; planets; porphyritic texture; silicates; terrestrial planets; textures; variations; vesicular texture; zoning ER - TY - JOUR T1 - A technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models AN - 1832674034; 698373-26 AB - A transient technique for generating ice sheet preindustrial initial conditions for long-term coupled ice sheet/climate model simulations is developed and demonstrated over the Greenland ice sheet using the Community Earth System Model (CESM). End-member paleoclimate simulations of the last glacial maximum, mid-Holocene optimum and the preindustrial are combined using weighting provided by ice core data time series to derive continuous energy-balance-model-derived surface mass balance and surface temperature fields, which are subsequently used to force a long transient ice sheet model simulation of the last glacial cycle, ending at the preindustrial. The procedure accounts for the evolution of climate through the last glacial period and converges to a simulated preindustrial ice sheet that is geometrically and thermodynamically consistent with the preindustrial CESM state, yet contains a transient memory of past climate. The preindustrial state generated using this technique notably improves upon the standard equilibrium spin-up technique, relative to observations and other model studies, although in the demonstration we present here, large biases remain due primarily to climate model forcing biases. Ultimately, the method we describe provides a clear template for generating initial conditions for ice sheets within a fully coupled climate model framework that allows for the effects of past climate history to be self-consistently included in long-term simulations of the fully coupled ice sheet/climate system. JF - Geoscientific Model Development (GMD) AU - Fyke, J G AU - Sacks, W J AU - Lipscomb, W H Y1 - 2014 PY - 2014 DA - 2014 SP - 1183 EP - 1195 PB - Copernicus Publications, Gottingen VL - 7 IS - 3 SN - 1991-959X, 1991-959X KW - methods KW - last glacial maximum KW - Greenland ice sheet KW - thermal regime KW - simulation KW - paleoclimatology KW - energy balance KW - feasibility studies KW - climate change KW - temperature KW - Cenozoic KW - Greenland KW - topography KW - mass balance KW - thermodynamic properties KW - Pre-Industrial period KW - climate forcing KW - climate KW - ice cores KW - Quaternary KW - time series analysis KW - Mid-Holocene Climatic Optimum KW - Arctic region KW - statistical analysis KW - interpolation KW - equations KW - spin-up method KW - ice sheets KW - boundary conditions KW - geometry KW - models KW - Antarctic ice sheet KW - Antarctica KW - Community Earth System Model KW - glacial geology KW - CESM KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832674034?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geoscientific+Model+Development+%28GMD%29&rft.atitle=A+technique+for+generating+consistent+ice+sheet+initial+conditions+for+coupled+ice+sheet%2Fclimate+models&rft.au=Fyke%2C+J+G%3BSacks%2C+W+J%3BLipscomb%2C+W+H&rft.aulast=Fyke&rft.aufirst=J&rft.date=2014-01-01&rft.volume=7&rft.issue=3&rft.spage=1183&rft.isbn=&rft.btitle=&rft.title=Geoscientific+Model+Development+%28GMD%29&rft.issn=1991959X&rft_id=info:doi/ L2 - http://www.geosci-model-dev.net/7/1183/2014/gmd-7-1183-2014.pdf http://www.geosci-model-dev.net/volumes_and_issues.html LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Number of references - 52 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - Antarctic ice sheet; Antarctica; Arctic region; boundary conditions; Cenozoic; CESM; climate; climate change; climate forcing; Community Earth System Model; energy balance; equations; feasibility studies; geometry; glacial geology; Greenland; Greenland ice sheet; ice cores; ice sheets; interpolation; last glacial maximum; mass balance; methods; Mid-Holocene Climatic Optimum; models; paleoclimatology; Pre-Industrial period; Quaternary; simulation; spin-up method; statistical analysis; temperature; thermal regime; thermodynamic properties; time series analysis; topography ER - TY - JOUR T1 - Evidence for Os isotopic homogeneity int he solar nebula from CV-CK carbonaceous chondrites AN - 1832660367; 778255-42 JF - NIPR Symposium on Polar Science AU - Goderis, S AU - Brandon, A D AU - Mayer, B AU - Humayun, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - unpaginated PB - National Institute of Polar Research, Tokyo VL - 5 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832660367?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=NIPR+Symposium+on+Polar+Science&rft.atitle=Evidence+for+Os+isotopic+homogeneity+int+he+solar+nebula+from+CV-CK+carbonaceous+chondrites&rft.au=Goderis%2C+S%3BBrandon%2C+A+D%3BMayer%2C+B%3BHumayun%2C+M%3BAnonymous&rft.aulast=Goderis&rft.aufirst=S&rft.date=2014-01-01&rft.volume=5&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=NIPR+Symposium+on+Polar+Science&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - The 5th symposium on polar science N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 10 N1 - Last updated - 2017-01-24 N1 - CODEN - #07980 ER - TY - BOOK T1 - Geochemical investigation in an effort to increase bentonite barrier's thermal load capacity to accommodate 32-PWR dual purpose canisters AN - 1832638329; 759663-43 JF - International conference on the Performance of engineered barriers; physical and chemical properties, behaviour and evolution AU - Cheshire, Michael AU - Hardin, Ernest AU - Caporuscio, Florie AU - Jove-Colon, Carlos AU - McCarney, Mary Kate Y1 - 2014 PY - 2014 DA - 2014 PB - Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover KW - United States KW - backfill KW - experimental studies KW - sealing KW - bentonite KW - underground space KW - landfills KW - research KW - radioactive waste KW - laboratory studies KW - physical properties KW - sedimentary rocks KW - diagenesis KW - waste disposal KW - thermal effects KW - clastic rocks KW - underground disposal KW - sanitary landfills KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832638329?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef+In+Process&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Cheshire%2C+Michael%3BHardin%2C+Ernest%3BCaporuscio%2C+Florie%3BJove-Colon%2C+Carlos%3BMcCarney%2C+Mary+Kate&rft.aulast=Cheshire&rft.aufirst=Michael&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Geochemical+investigation+in+an+effort+to+increase+bentonite+barrier%27s+thermal+load+capacity+to+accommodate+32-PWR+dual+purpose+canisters&rft.title=Geochemical+investigation+in+an+effort+to+increase+bentonite+barrier%27s+thermal+load+capacity+to+accommodate+32-PWR+dual+purpose+canisters&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - International conference on the Performance of engineered barriers; physical and chemical properties, behaviour and evolution N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany N1 - Number of references - 9 N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Near-surface internal melting; a substantial mass loss on Antarctic Dry Valley glaciers AN - 1832611569; 715562-1 AB - The McMurdo Dry Valleys, southern Victoria Land, East Antarctica, are a polar desert, and melt from glacial ice is the primary source of water to streams, lakes and associated ecosystems. Previous work found that to adequately model glacier ablation and subsurface ice temperatures with a surface energy-balance model required including the transmission of solar radiation into the ice. Here we investigate the contribution of subsurface melt to the mass balance of (and runoff from) Dry Valley glaciers by including a drainage process in the model and applying the model to three glacier sites using 13 years of hourly meteorological data. Model results for the smooth glacier surfaces common to many glaciers in the Dry Valleys showed that sublimation was typically the largest component of surface lowering, with rare episodes of surface melting, consistent with anecdotal field observations. Results also showed extensive internal melting 5-15 cm below the ice surface, the drainage of which accounted for 50% of summer ablation. This is consistent with field observations of subsurface streams and formation of a weathering crust. We identify an annual cycle of weathering crust formation in summer and its removal during the 10 months of winter sublimation. JF - Journal of Glaciology AU - Hoffman, Matthew J AU - Fountain, Andrew G AU - Liston, Glen E Y1 - 2014 PY - 2014 DA - 2014 SP - 361 EP - 374 PB - International Glaciological Society, Cambridge VL - 60 IS - 220 SN - 0022-1430, 0022-1430 KW - sublimation KW - Antarctica KW - ablation KW - mass balance KW - McMurdo dry valleys KW - Victoria Land KW - meltwater KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832611569?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Glaciology&rft.atitle=Near-surface+internal+melting%3B+a+substantial+mass+loss+on+Antarctic+Dry+Valley+glaciers&rft.au=Hoffman%2C+Matthew+J%3BFountain%2C+Andrew+G%3BListon%2C+Glen+E&rft.aulast=Hoffman&rft.aufirst=Matthew&rft.date=2014-01-01&rft.volume=60&rft.issue=220&rft.spage=361&rft.isbn=&rft.btitle=&rft.title=Journal+of+Glaciology&rft.issn=00221430&rft_id=info:doi/10.3189%2F2014JoG13J095 L2 - http://www.igsoc.org/journal/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Institute of Geological and Nuclear Sciences Limited (GNS Science), Lower Hutt, New Zealand N1 - Number of references - 68 N1 - Last updated - 2017-01-24 N1 - CODEN - JOGLAO N1 - SubjectsTermNotLitGenreText - ablation; Antarctica; mass balance; McMurdo dry valleys; meltwater; sublimation; Victoria Land DO - http://dx.doi.org/10.3189/2014JoG13J095 ER - TY - JOUR T1 - Numerical computation of optical properties of biomass burning soot from morphological and mixing state information provided by field and laboratory observations AN - 1812210062; 2016-071729 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - China, S AU - Scarnato, B V AU - Sharma, N AU - Gorkowski, K AU - Aiken, A C AU - Liu, S AU - Dubey, M K AU - Mazzoleni, C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 417 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - experimental studies KW - biomass KW - numerical analysis KW - electron microscopy data KW - New Mexico KW - simulation KW - environmental effects KW - fires KW - laboratory studies KW - optical properties KW - mixing KW - aerosols KW - particles KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812210062?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Numerical+computation+of+optical+properties+of+biomass+burning+soot+from+morphological+and+mixing+state+information+provided+by+field+and+laboratory+observations&rft.au=China%2C+S%3BScarnato%2C+B+V%3BSharma%2C+N%3BGorkowski%2C+K%3BAiken%2C+A+C%3BLiu%2C+S%3BDubey%2C+M+K%3BMazzoleni%2C+C%3BAnonymous&rft.aulast=China&rft.aufirst=S&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=417&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-08-18 N1 - SubjectsTermNotLitGenreText - aerosols; biomass; electron microscopy data; environmental effects; experimental studies; field studies; fires; laboratory studies; mixing; New Mexico; numerical analysis; optical properties; particles; simulation; United States ER - TY - JOUR T1 - The superaggregate form of soot from wildfires and its impact on direct forcing AN - 1793205855; 2016-048268 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Chakrabarty, Rajan K AU - Beres, Nicholas D AU - Moosmueller, Hans AU - China, Swarup AU - Mazzoleni, Claudio AU - Dubey, Manvendra K AU - Liu, Li AU - Mishchenko, Michael I AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 374 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - global change KW - New Mexico KW - India KW - air pollution KW - soot KW - fires KW - California KW - monsoons KW - Mexico state KW - melting KW - Indian Peninsula KW - Federal District Mexico KW - Asia KW - fractals KW - global warming KW - patterns KW - Mexico City Mexico KW - pollution KW - glaciers KW - atmosphere KW - models KW - physical properties KW - Mexico KW - particles KW - public health KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793205855?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=The+superaggregate+form+of+soot+from+wildfires+and+its+impact+on+direct+forcing&rft.au=Chakrabarty%2C+Rajan+K%3BBeres%2C+Nicholas+D%3BMoosmueller%2C+Hans%3BChina%2C+Swarup%3BMazzoleni%2C+Claudio%3BDubey%2C+Manvendra+K%3BLiu%2C+Li%3BMishchenko%2C+Michael+I%3BAnonymous&rft.aulast=Chakrabarty&rft.aufirst=Rajan&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=374&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-06-02 N1 - SubjectsTermNotLitGenreText - air pollution; Asia; atmosphere; California; Federal District Mexico; fires; fractals; glaciers; global change; global warming; India; Indian Peninsula; melting; Mexico; Mexico City Mexico; Mexico state; models; monsoons; New Mexico; particles; patterns; physical properties; pollution; public health; soot; United States ER - TY - JOUR T1 - Brine inclusion migration in single salt crystals under thermal gradient AN - 1793205764; 2016-048234 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Caporuscio, F A AU - Boukhalfa, H AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 340 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - water KW - United States KW - Eddy County New Mexico KW - precipitation KW - heat flow KW - brines KW - New Mexico KW - geothermal gradient KW - Waste Isolation Pilot Plant KW - solution KW - temperature KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793205764?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Brine+inclusion+migration+in+single+salt+crystals+under+thermal+gradient&rft.au=Caporuscio%2C+F+A%3BBoukhalfa%2C+H%3BAnonymous&rft.aulast=Caporuscio&rft.aufirst=F&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=340&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 2 N1 - Last updated - 2016-06-02 N1 - SubjectsTermNotLitGenreText - brines; Eddy County New Mexico; geothermal gradient; heat flow; New Mexico; precipitation; solution; temperature; United States; Waste Isolation Pilot Plant; water ER - TY - JOUR T1 - Electron microprobe confirmation of ChemCam LIBS analyses; thin sections from a Mars analogue site AN - 1789751563; 2016-043525 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gallegos, Zach E AU - Newsom, H E AU - Ollila, A M AU - Lanza, N L AU - Wiens, R C AU - Clegg, S M AU - McInroy, R E AU - Osinski, G R AU - Lee, P AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2305 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - ChemCam instrument KW - breccia KW - impact features KW - Mars KW - thin sections KW - metasomatism KW - Gale Crater KW - emission spectra KW - electron probe data KW - terrestrial planets KW - Queen Elizabeth Islands KW - planets KW - Devon Island KW - Canada KW - Nunavut KW - natural analogs KW - Mars Science Laboratory KW - LIBS spectra KW - Haughton impact structure KW - impact craters KW - hydrothermal alteration KW - spectra KW - carbonates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789751563?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Electron+microprobe+confirmation+of+ChemCam+LIBS+analyses%3B+thin+sections+from+a+Mars+analogue+site&rft.au=Gallegos%2C+Zach+E%3BNewsom%2C+H+E%3BOllila%2C+A+M%3BLanza%2C+N+L%3BWiens%2C+R+C%3BClegg%2C+S+M%3BMcInroy%2C+R+E%3BOsinski%2C+G+R%3BLee%2C+P%3BAnonymous&rft.aulast=Gallegos&rft.aufirst=Zach&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2305.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 4 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jun. 16, 2015 N1 - Last updated - 2016-05-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - breccia; Canada; carbonates; ChemCam instrument; Devon Island; electron probe data; emission spectra; Gale Crater; Haughton impact structure; hydrothermal alteration; impact craters; impact features; LIBS spectra; Mars; Mars Science Laboratory; metasomatism; natural analogs; Nunavut; planets; Queen Elizabeth Islands; spectra; terrestrial planets; thin sections ER - TY - JOUR T1 - Mineralogy at Bradbury landing site and Yellowknife Bay in Gale Crater, Mars, as measured using cation ratios, for Sols 13-360 AN - 1769964870; 2016-017394 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Dyar, M D AU - Dobosh, P AU - Bridges, J AU - Wiens, R AU - Johnson, J AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1788 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - calcium KW - magnesium KW - olivine group KW - Mars KW - Gale Crater KW - emission spectra KW - pyroxene group KW - olivine KW - Curiosity Rover KW - orthosilicates KW - LIBS spectra KW - ChemCam KW - framework silicates KW - spectra KW - stoichiometry KW - chemical ratios KW - chain silicates KW - alkaline earth metals KW - plagioclase KW - alkali metals KW - sodium KW - terrestrial planets KW - nesosilicates KW - planets KW - metals KW - potassium KW - Mars Science Laboratory KW - cations KW - feldspar group KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769964870?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Mineralogy+at+Bradbury+landing+site+and+Yellowknife+Bay+in+Gale+Crater%2C+Mars%2C+as+measured+using+cation+ratios%2C+for+Sols+13-360&rft.au=Dyar%2C+M+D%3BDobosh%2C+P%3BBridges%2C+J%3BWiens%2C+R%3BJohnson%2C+J%3BAnonymous&rft.aulast=Dyar&rft.aufirst=M&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1788.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 7 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accesed on April 27, 2015 N1 - Last updated - 2016-03-03 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; calcium; cations; chain silicates; ChemCam; chemical ratios; Curiosity Rover; emission spectra; feldspar group; framework silicates; Gale Crater; LIBS spectra; magnesium; Mars; Mars Science Laboratory; metals; nesosilicates; olivine; olivine group; orthosilicates; plagioclase; planets; potassium; pyroxene group; silicates; sodium; spectra; stoichiometry; terrestrial planets ER - TY - JOUR T1 - Automatic image analysis for adaptive instrument targeting; applications to MSL and Mars 2020 AN - 1756507873; 2016-004299 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Altinok, Alphan AU - Bornstein, B AU - Estlin, T AU - Gaines, D AU - Schaffer, S AU - Thompson, D R AU - Anderson, R C AU - Burl, M AU - Castano, R AU - Wiens, R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2871 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - imagery KW - data processing KW - astrobiology KW - Mars KW - simulation KW - automated analysis KW - terrestrial planets KW - planets KW - detection KW - identification KW - classification KW - Mars Science Laboratory KW - surveys KW - applications KW - spectroscopy KW - instruments KW - image analysis KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756507873?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Automatic+image+analysis+for+adaptive+instrument+targeting%3B+applications+to+MSL+and+Mars+2020&rft.au=Altinok%2C+Alphan%3BBornstein%2C+B%3BEstlin%2C+T%3BGaines%2C+D%3BSchaffer%2C+S%3BThompson%2C+D+R%3BAnderson%2C+R+C%3BBurl%2C+M%3BCastano%2C+R%3BWiens%2C+R%3BAnonymous&rft.aulast=Altinok&rft.aufirst=Alphan&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2871.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Aug. 17, 2015 N1 - Last updated - 2016-05-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - applications; astrobiology; automated analysis; classification; data processing; detection; identification; image analysis; imagery; instruments; Mars; Mars Science Laboratory; planets; simulation; spectroscopy; surveys; terrestrial planets ER - TY - JOUR T1 - Remote Raman and LIBS spectroscopy for future Mars rover missions AN - 1756507626; 2016-004286 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Clegg, S M AU - Wiens, R C AU - Maurice, S AU - Gasnault, O AU - Sharma, S K AU - Misra, A K AU - Newell, R AU - Bender, S AU - Forni, O AU - Lasue, J AU - Dyar, M D AU - Nowak-Lovato, K L AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2463 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - laser-induced breakdown spectroscopy KW - Mars KW - calibration KW - emission spectra KW - dolomite KW - laboratory studies KW - mineral composition KW - quantitative analysis KW - future KW - LIBS spectra KW - spectra KW - chemical composition KW - ChemCam instrument KW - experimental studies KW - sulfates KW - rovers KW - emission spectroscopy KW - terrestrial planets KW - Raman spectroscopy KW - planets KW - Raman spectra KW - barite KW - spectroscopy KW - carbonates KW - instruments KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756507626?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Remote+Raman+and+LIBS+spectroscopy+for+future+Mars+rover+missions&rft.au=Clegg%2C+S+M%3BWiens%2C+R+C%3BMaurice%2C+S%3BGasnault%2C+O%3BSharma%2C+S+K%3BMisra%2C+A+K%3BNewell%2C+R%3BBender%2C+S%3BForni%2C+O%3BLasue%2C+J%3BDyar%2C+M+D%3BNowak-Lovato%2C+K+L%3BAnonymous&rft.aulast=Clegg&rft.aufirst=S&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2463.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 7 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Aug. 10, 2015 N1 - Last updated - 2016-01-14 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - barite; calibration; carbonates; ChemCam instrument; chemical composition; dolomite; emission spectra; emission spectroscopy; experimental studies; future; instruments; laboratory studies; laser-induced breakdown spectroscopy; LIBS spectra; Mars; mineral composition; planets; quantitative analysis; Raman spectra; Raman spectroscopy; remote sensing; rovers; spectra; spectroscopy; sulfates; terrestrial planets ER - TY - JOUR T1 - Accurate analysis of shallow solar wind ion implants by SIMS backside depth profiling AN - 1756507501; 2016-004261 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Heber, V S AU - McKeegan, K D AU - Smith, S AU - Jurewicz, A J G AU - Olinger, C AU - Burnett, D S AU - Guan, Y AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1203 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - alkaline earth metals KW - magnesium KW - Genesis Mission KW - oxygen KW - ion probe data KW - isotopes KW - solar wind KW - data processing KW - mass spectra KW - standardization KW - Mg-24 KW - simulation KW - ions KW - stable isotopes KW - nitrogen KW - sample preparation KW - errors KW - metals KW - carbon KW - spectra KW - corrections KW - accuracy KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756507501?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Accurate+analysis+of+shallow+solar+wind+ion+implants+by+SIMS+backside+depth+profiling&rft.au=Heber%2C+V+S%3BMcKeegan%2C+K+D%3BSmith%2C+S%3BJurewicz%2C+A+J+G%3BOlinger%2C+C%3BBurnett%2C+D+S%3BGuan%2C+Y%3BAnonymous&rft.aulast=Heber&rft.aufirst=V&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1203.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 12 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jul. 31, 2015 N1 - Last updated - 2016-01-14 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - accuracy; alkaline earth metals; carbon; corrections; data processing; errors; Genesis Mission; ion probe data; ions; isotopes; magnesium; mass spectra; metals; Mg-24; nitrogen; oxygen; sample preparation; simulation; solar wind; spectra; stable isotopes; standardization ER - TY - JOUR T1 - Mg profile correction in Genesis Si collectors using rastered ion imaging AN - 1756507377; 2016-004258 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Westphal, A J AU - Ogliore, R C AU - Huss, G R AU - Nakashima, K AU - Olinger, C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2671 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - methods KW - alkaline earth metals KW - magnesium KW - imagery KW - Genesis Mission KW - ion probe data KW - isotopes KW - statistical analysis KW - solar wind KW - mass spectra KW - pixels KW - depth KW - sample preparation KW - rastered ion imaging KW - errors KW - detection KW - silicon collector KW - metals KW - Sample 60633 KW - spectra KW - corrections KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756507377?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Mg+profile+correction+in+Genesis+Si+collectors+using+rastered+ion+imaging&rft.au=Westphal%2C+A+J%3BOgliore%2C+R+C%3BHuss%2C+G+R%3BNakashima%2C+K%3BOlinger%2C+C%3BAnonymous&rft.aulast=Westphal&rft.aufirst=A&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2671.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 2 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jul. 31, 2015 N1 - Last updated - 2016-01-14 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; corrections; depth; detection; errors; Genesis Mission; imagery; ion probe data; isotopes; magnesium; mass spectra; metals; methods; pixels; rastered ion imaging; Sample 60633; sample preparation; silicon collector; solar wind; spectra; statistical analysis ER - TY - JOUR T1 - Mafic to felsic igneous rock in hummocky plain at Gale Crater; a ChemCam campaign (Sol 13-45 and Sol 326-359) AN - 1752579430; 2016-002555 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Sautter, V AU - Fabre, C AU - Forni, Olivier AU - Toplis, M AU - Cousin, A AU - Ollila, A AU - Meslin, P Y AU - Mangold, N AU - Wiens, R C AU - Gasnault, Olivier AU - Maurice, S AU - Lanza, N L AU - Anderson, R B AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1369 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - magnesium KW - impact features KW - rhyolitic composition KW - igneous rocks KW - mafic composition KW - Mars KW - Bradbury Rise KW - iron KW - Gale Crater KW - alkali feldspar KW - aluminum KW - framework silicates KW - chemical composition KW - ChemCam instrument KW - alkaline earth metals KW - textures KW - statistical analysis KW - alkali metals KW - sodium KW - felsic composition KW - ejecta KW - Rocknest KW - terrestrial planets KW - planets KW - porphyritic texture KW - metals KW - alluvial fans KW - potassium KW - impact craters KW - feldspar group KW - phenocrysts KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752579430?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Mafic+to+felsic+igneous+rock+in+hummocky+plain+at+Gale+Crater%3B+a+ChemCam+campaign+%28Sol+13-45+and+Sol+326-359%29&rft.au=Sautter%2C+V%3BFabre%2C+C%3BForni%2C+Olivier%3BToplis%2C+M%3BCousin%2C+A%3BOllila%2C+A%3BMeslin%2C+P+Y%3BMangold%2C+N%3BWiens%2C+R+C%3BGasnault%2C+Olivier%3BMaurice%2C+S%3BLanza%2C+N+L%3BAnderson%2C+R+B%3BAnonymous&rft.aulast=Sautter&rft.aufirst=V&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1369.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 17 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jul. 8, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali feldspar; alkali metals; alkaline earth metals; alluvial fans; aluminum; Bradbury Rise; ChemCam instrument; chemical composition; ejecta; feldspar group; felsic composition; framework silicates; Gale Crater; igneous rocks; impact craters; impact features; iron; mafic composition; magnesium; Mars; metals; phenocrysts; planets; porphyritic texture; potassium; rhyolitic composition; Rocknest; silicates; sodium; statistical analysis; terrestrial planets; textures ER - TY - JOUR T1 - A one hundred million SPH particle simulation of the Moon forming impact AN - 1752578333; 2016-000480 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Teodoro, Luis F A AU - Warren, Michael S AU - Fryer, Christopher AU - Eke, Vincent AU - Zahnle, Kevin J AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2703 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - smoothed particle hydrodynamics KW - Earth-Moon couple KW - giant impact hypothesis KW - Moon KW - orbits KW - planetesimals KW - simulation KW - particles KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578333?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=A+one+hundred+million+SPH+particle+simulation+of+the+Moon+forming+impact&rft.au=Teodoro%2C+Luis+F+A%3BWarren%2C+Michael+S%3BFryer%2C+Christopher%3BEke%2C+Vincent%3BZahnle%2C+Kevin+J%3BAnonymous&rft.aulast=Teodoro&rft.aufirst=Luis+F&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2703.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 8 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Apr. 15, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Earth-Moon couple; giant impact hypothesis; Moon; orbits; particles; planetesimals; simulation; smoothed particle hydrodynamics ER - TY - JOUR T1 - Silica-Fe-rich components of rocks, Gale Crater, Mars AN - 1752578236; 2016-002554 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Fisk, M R AU - Dyar, M D AU - Cousin, A AU - Bridges, N T AU - Bridges, J C AU - Anderson, R B AU - Johnson, J AU - Blaney, Diana L AU - Mangold, N AU - Herkenhoff, K E AU - Weins, R AU - Clegg, S M AU - Meslin, P Y AU - Gasnault, Olivier AU - Forni, Olivier AU - Clark, B C AU - Pinet, P AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1674 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - calcium KW - magnesium KW - Mars KW - iron-rich composition KW - silicon KW - iron KW - Gale Crater KW - emission spectra KW - silica KW - aluminum KW - LIBS spectra KW - framework silicates KW - spectra KW - stoichiometry KW - rocks KW - ChemCam instrument KW - alkaline earth metals KW - alkali metals KW - sodium KW - terrestrial planets KW - aqueous alteration KW - planets KW - titanium KW - metals KW - potassium KW - Mars Science Laboratory KW - feldspar group KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578236?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Silica-Fe-rich+components+of+rocks%2C+Gale+Crater%2C+Mars&rft.au=Fisk%2C+M+R%3BDyar%2C+M+D%3BCousin%2C+A%3BBridges%2C+N+T%3BBridges%2C+J+C%3BAnderson%2C+R+B%3BJohnson%2C+J%3BBlaney%2C+Diana+L%3BMangold%2C+N%3BHerkenhoff%2C+K+E%3BWeins%2C+R%3BClegg%2C+S+M%3BMeslin%2C+P+Y%3BGasnault%2C+Olivier%3BForni%2C+Olivier%3BClark%2C+B+C%3BPinet%2C+P%3BAnonymous&rft.aulast=Fisk&rft.aufirst=M&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1674.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 2 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jul. 8, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; aluminum; aqueous alteration; calcium; ChemCam instrument; emission spectra; feldspar group; framework silicates; Gale Crater; iron; iron-rich composition; LIBS spectra; magnesium; Mars; Mars Science Laboratory; metals; planets; potassium; rocks; silica; silicates; silicon; sodium; spectra; stoichiometry; terrestrial planets; titanium ER - TY - JOUR T1 - Rocknest and beyond; iron bearing cemented sediments in Gale Crater from ChemCam observations AN - 1752577862; 2016-002558 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Blaney, Diana L AU - Wiens, R C AU - Maurice, S AU - Clegg, S M AU - Anderson, R B AU - Kah, L C AU - Le Mouelic, Stephane AU - Ollila, A AU - Bridges, N T AU - Berger, G AU - Bridges, J C AU - Cousin, A AU - Clark, B C AU - Dyar, M D AU - King, P L AU - Lanza, N L AU - Mangold, N AU - Meslin, P Y AU - Newsom, H AU - Schroeder, S AU - Rowland, S AU - Johnson, J AU - Edgar, L A AU - Gasnault, Olivier AU - Forni, Olivier AU - Schmidt, M AU - Goetz, W AU - Stack, K AU - Sumner, D AU - Fisk, M R AU - Maden, M B AU - Tokar, R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2122 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - magnesium KW - imagery KW - Mars KW - Bradbury Rise KW - iron KW - Gale Crater KW - emission spectra KW - sedimentary rocks KW - hematite KW - aluminum KW - Curiosity Rover KW - oxides KW - LIBS spectra KW - spectra KW - basaltic composition KW - sedimentary structures KW - ChemCam instrument KW - alkaline earth metals KW - laminations KW - cementation KW - surface textures KW - Rocknest KW - terrestrial planets KW - planets KW - planar bedding structures KW - metals KW - diagenesis KW - parent materials KW - Mars Science Laboratory KW - Remote Microscopic Imager KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577862?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Rocknest+and+beyond%3B+iron+bearing+cemented+sediments+in+Gale+Crater+from+ChemCam+observations&rft.au=Blaney%2C+Diana+L%3BWiens%2C+R+C%3BMaurice%2C+S%3BClegg%2C+S+M%3BAnderson%2C+R+B%3BKah%2C+L+C%3BLe+Mouelic%2C+Stephane%3BOllila%2C+A%3BBridges%2C+N+T%3BBerger%2C+G%3BBridges%2C+J+C%3BCousin%2C+A%3BClark%2C+B+C%3BDyar%2C+M+D%3BKing%2C+P+L%3BLanza%2C+N+L%3BMangold%2C+N%3BMeslin%2C+P+Y%3BNewsom%2C+H%3BSchroeder%2C+S%3BRowland%2C+S%3BJohnson%2C+J%3BEdgar%2C+L+A%3BGasnault%2C+Olivier%3BForni%2C+Olivier%3BSchmidt%2C+M%3BGoetz%2C+W%3BStack%2C+K%3BSumner%2C+D%3BFisk%2C+M+R%3BMaden%2C+M+B%3BTokar%2C+R%3BAnonymous&rft.aulast=Blaney&rft.aufirst=Diana&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2122.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 12 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jul. 8, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; aluminum; basaltic composition; Bradbury Rise; cementation; ChemCam instrument; Curiosity Rover; diagenesis; emission spectra; Gale Crater; hematite; imagery; iron; laminations; LIBS spectra; magnesium; Mars; Mars Science Laboratory; metals; oxides; parent materials; planar bedding structures; planets; Remote Microscopic Imager; Rocknest; sedimentary rocks; sedimentary structures; spectra; surface textures; terrestrial planets ER - TY - JOUR T1 - Exploring the composition and nature of the X-ray amorphous components of Martian soil and rocks at Gale Crater, Mars AN - 1752577763; 2016-002561 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Dehouck, Erwin AU - McLennan, S M AU - Meslin, P Y AU - Cousin, A AU - Rampe, E B AU - Lanza, N L AU - Hurowitz, J A AU - Rapin, W AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1454 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - X-ray diffraction data KW - Cumberland outcrop KW - Mars KW - Gale Crater KW - mineral composition KW - John Klein Outcrop KW - mass balance KW - Curiosity Rover KW - CheMin instrument KW - chemical composition KW - basaltic composition KW - rocks KW - glass materials KW - soils KW - griffithite KW - hisingerite KW - amorphous materials KW - smectite KW - Sheepbed Mudstone KW - Rocknest KW - clay minerals KW - terrestrial planets KW - planets KW - allophane KW - Mars Science Laboratory KW - sheet silicates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577763?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Exploring+the+composition+and+nature+of+the+X-ray+amorphous+components+of+Martian+soil+and+rocks+at+Gale+Crater%2C+Mars&rft.au=Dehouck%2C+Erwin%3BMcLennan%2C+S+M%3BMeslin%2C+P+Y%3BCousin%2C+A%3BRampe%2C+E+B%3BLanza%2C+N+L%3BHurowitz%2C+J+A%3BRapin%2C+W%3BAnonymous&rft.aulast=Dehouck&rft.aufirst=Erwin&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1454.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 9 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jul. 10, 2015 N1 - Last updated - 2016-05-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - allophane; amorphous materials; basaltic composition; chemical composition; CheMin instrument; clay minerals; Cumberland outcrop; Curiosity Rover; Gale Crater; glass materials; griffithite; hisingerite; John Klein Outcrop; Mars; Mars Science Laboratory; mass balance; mineral composition; planets; Rocknest; rocks; Sheepbed Mudstone; sheet silicates; silicates; smectite; soils; terrestrial planets; X-ray diffraction data ER - TY - JOUR T1 - Calcium sulfate characterized by ChemCam/Curiosity at Gale Crater, Mars AN - 1752577695; 2016-002562 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Nachon, Marion AU - Clegg, S M AU - Mangold, N AU - Schroeder, S AU - Kah, L C AU - Dromart, G AU - Ollila, A AU - Johnson, J R AU - Oehler, D Z AU - Bridges, J C AU - Le Mouelic, Stephane AU - Forni, Olivier AU - Wiens, R C AU - Anderson, R B AU - Blaney, Diana L AU - Bell, J F, III AU - Clark, B C AU - Cousin, A AU - Dyar, M D AU - Ehlmann, B L AU - Fabre, C AU - Gasnault, Olivier AU - Grotzinger, J P AU - Lasue, Jeremie AU - Lewin, E AU - Leveille, R AU - McLennan, S M AU - Maurice, S AU - Meslin, P Y AU - Rice, M AU - Squyres, S W AU - Stack, K AU - Sumner, D Y AU - Vaniman, D AU - Wellington, D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2006 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - calcium sulfate KW - imagery KW - Glenelg Member KW - Shaler Member KW - geotraverses KW - Mars KW - Sheepbed Member KW - Gale Crater KW - emission spectra KW - sedimentary rocks KW - Curiosity Rover KW - LIBS spectra KW - ChemCam KW - spectra KW - Yellowknife Bay KW - sulfates KW - textures KW - Yellowknife Bay Formation KW - Remote Micro-Imager KW - Gillespie Member KW - veins KW - terrestrial planets KW - planets KW - Mars Science Laboratory KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577695?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Calcium+sulfate+characterized+by+ChemCam%2FCuriosity+at+Gale+Crater%2C+Mars&rft.au=Nachon%2C+Marion%3BClegg%2C+S+M%3BMangold%2C+N%3BSchroeder%2C+S%3BKah%2C+L+C%3BDromart%2C+G%3BOllila%2C+A%3BJohnson%2C+J+R%3BOehler%2C+D+Z%3BBridges%2C+J+C%3BLe+Mouelic%2C+Stephane%3BForni%2C+Olivier%3BWiens%2C+R+C%3BAnderson%2C+R+B%3BBlaney%2C+Diana+L%3BBell%2C+J+F%2C+III%3BClark%2C+B+C%3BCousin%2C+A%3BDyar%2C+M+D%3BEhlmann%2C+B+L%3BFabre%2C+C%3BGasnault%2C+Olivier%3BGrotzinger%2C+J+P%3BLasue%2C+Jeremie%3BLewin%2C+E%3BLeveille%2C+R%3BMcLennan%2C+S+M%3BMaurice%2C+S%3BMeslin%2C+P+Y%3BRice%2C+M%3BSquyres%2C+S+W%3BStack%2C+K%3BSumner%2C+D+Y%3BVaniman%2C+D%3BWellington%2C+D%3BAnonymous&rft.aulast=Nachon&rft.aufirst=Marion&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2006.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jul. 20, 2015 N1 - Last updated - 2016-05-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calcium sulfate; ChemCam; Curiosity Rover; emission spectra; Gale Crater; geotraverses; Gillespie Member; Glenelg Member; imagery; LIBS spectra; Mars; Mars Science Laboratory; planets; Remote Micro-Imager; sedimentary rocks; Shaler Member; Sheepbed Member; spectra; sulfates; terrestrial planets; textures; veins; Yellowknife Bay; Yellowknife Bay Formation ER - TY - JOUR T1 - ChemCam blind targets; a helpful way of analyzing soils and rocks along the traverse AN - 1752576921; 2016-002557 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Cousin, A AU - Clegg, S M AU - Dehouck, Erwin AU - Fabre, C AU - Forni, Olivier AU - Gasnault, Olivier AU - Lanza, N L AU - Lasue, Jeremie AU - Mangold, N AU - Maurice, S AU - Meslin, P Y AU - Rapin, W AU - Sautter, V AU - Schroeder, S AU - Wiens, R C AU - Yingst, A AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1278 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - magnesium KW - imagery KW - Glenelg Member KW - geotraverses KW - Navcam KW - mafic composition KW - Mars KW - silicon KW - iron KW - Gale Crater KW - aluminum KW - Curiosity Rover KW - chemical composition KW - rocks KW - soils KW - ChemCam instrument KW - alkaline earth metals KW - statistical analysis KW - alkali metals KW - sodium KW - felsic composition KW - terrestrial planets KW - planets KW - metals KW - fine-grained materials KW - Mars Science Laboratory KW - Remote Microscopic Imager KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576921?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=ChemCam+blind+targets%3B+a+helpful+way+of+analyzing+soils+and+rocks+along+the+traverse&rft.au=Cousin%2C+A%3BClegg%2C+S+M%3BDehouck%2C+Erwin%3BFabre%2C+C%3BForni%2C+Olivier%3BGasnault%2C+Olivier%3BLanza%2C+N+L%3BLasue%2C+Jeremie%3BMangold%2C+N%3BMaurice%2C+S%3BMeslin%2C+P+Y%3BRapin%2C+W%3BSautter%2C+V%3BSchroeder%2C+S%3BWiens%2C+R+C%3BYingst%2C+A%3BAnonymous&rft.aulast=Cousin&rft.aufirst=A&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1278.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 9 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jul. 8, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; aluminum; ChemCam instrument; chemical composition; Curiosity Rover; felsic composition; fine-grained materials; Gale Crater; geotraverses; Glenelg Member; imagery; iron; mafic composition; magnesium; Mars; Mars Science Laboratory; metals; Navcam; planets; Remote Microscopic Imager; rocks; silicon; sodium; soils; statistical analysis; terrestrial planets ER - TY - JOUR T1 - Factors controlling polygon sizes in the Martian near-surface AN - 1752576886; 2016-000510 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Travis, B J AU - Feldman, W C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2568 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - Mars KW - freezing KW - simulation KW - temperature KW - sedimentary rocks KW - ice KW - surface features KW - HiRISE KW - ground ice KW - polygons KW - soils KW - chemically precipitated rocks KW - heat flux KW - numerical models KW - convection KW - evaporites KW - thawing KW - depth KW - size KW - hydrothermal conditions KW - terrestrial planets KW - planets KW - brines KW - patterned ground KW - permeability KW - salt KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576886?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Factors+controlling+polygon+sizes+in+the+Martian+near-surface&rft.au=Travis%2C+B+J%3BFeldman%2C+W+C%3BAnonymous&rft.aulast=Travis&rft.aufirst=B&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2568.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 9 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Apr. 17, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - brines; chemically precipitated rocks; convection; depth; evaporites; freezing; ground ice; heat flux; HiRISE; hydrothermal conditions; ice; Mars; numerical models; patterned ground; permeability; planets; polygons; salt; sedimentary rocks; simulation; size; soils; surface features; temperature; terrestrial planets; thawing ER - TY - JOUR T1 - Comparing LIBS spectra from ChemCam instrument on board Curiosity (MSL); how different can they be and still be "the same"? AN - 1752576850; 2016-002544 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Lewin, Eric AU - Lasue, Jeremie AU - Forni, Olivier AU - Tokar, Bob AU - Blaney, Diana L AU - Melikechi, Noureddine AU - Gasnault, Olivier AU - Maurice, Sylvestre AU - Wiens, Roger AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2817 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - ChemCam instrument KW - statistical analysis KW - data processing KW - Mars KW - calibration KW - measurement KW - emission spectra KW - terrestrial planets KW - planets KW - multivariate analysis KW - Curiosity Rover KW - Mars Science Laboratory KW - LIBS spectra KW - spectra KW - uncertainty KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576850?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Comparing+LIBS+spectra+from+ChemCam+instrument+on+board+Curiosity+%28MSL%29%3B+how+different+can+they+be+and+still+be+%22the+same%22%3F&rft.au=Lewin%2C+Eric%3BLasue%2C+Jeremie%3BForni%2C+Olivier%3BTokar%2C+Bob%3BBlaney%2C+Diana+L%3BMelikechi%2C+Noureddine%3BGasnault%2C+Olivier%3BMaurice%2C+Sylvestre%3BWiens%2C+Roger%3BAnonymous&rft.aulast=Lewin&rft.aufirst=Eric&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2817.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - TX N1 - SuppNotes - Accessed on July 7, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calibration; ChemCam instrument; Curiosity Rover; data processing; emission spectra; instruments; LIBS spectra; Mars; Mars Science Laboratory; measurement; multivariate analysis; planets; spectra; statistical analysis; terrestrial planets; uncertainty ER - TY - JOUR T1 - Study towards the calibration of the hydrogen signal with water content as measured by ChemCam in Martian soils AN - 1752576539; 2016-002543 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Rapin, W AU - Meslin, P Y AU - Schroder, S AU - Maurice, S AU - Gasnault, Olivier AU - Cousin, A AU - Wiens, R C AU - Forni, Olivier AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1982 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - standard deviation KW - data processing KW - water vapor KW - Mars KW - calibration KW - simulation KW - emission spectra KW - laboratory studies KW - JSC Mars-1 simulant KW - Curiosity Rover KW - LIBS spectra KW - water content KW - spectra KW - water KW - soils KW - ChemCam instrument KW - experimental studies KW - grain size KW - statistical analysis KW - atmosphere KW - adsorption KW - terrestrial planets KW - planets KW - volatiles KW - hydrogen KW - Mars Science Laboratory KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576539?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Study+towards+the+calibration+of+the+hydrogen+signal+with+water+content+as+measured+by+ChemCam+in+Martian+soils&rft.au=Rapin%2C+W%3BMeslin%2C+P+Y%3BSchroder%2C+S%3BMaurice%2C+S%3BGasnault%2C+Olivier%3BCousin%2C+A%3BWiens%2C+R+C%3BForni%2C+Olivier%3BAnonymous&rft.aulast=Rapin&rft.aufirst=W&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1982.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 5 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on July 7, 2015 N1 - Last updated - 2016-05-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - adsorption; atmosphere; calibration; ChemCam instrument; Curiosity Rover; data processing; emission spectra; experimental studies; grain size; hydrogen; JSC Mars-1 simulant; laboratory studies; LIBS spectra; Mars; Mars Science Laboratory; planets; regolith; simulation; soils; spectra; standard deviation; statistical analysis; terrestrial planets; volatiles; water; water content; water vapor ER - TY - JOUR T1 - Chemical and textural observations by ChemCam of conglomerates in Gale Crater AN - 1752576535; 2016-002560 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Wiens, R C AU - Mangold, N AU - Forni, Olivier AU - Ollila, A AU - Johnson, J R AU - Sautter, V AU - Maurice, S AU - Clegg, S M AU - Blaney, Diana L AU - Le Mouelic, Stephane AU - Anderson, R B AU - Bridges, N T AU - Clark, B C AU - Dromart, G AU - d'Uston, C AU - Fabre, C AU - Gasnault, Olivier AU - Herkenhoff, K E AU - Langevin, Y AU - Newsom, H AU - Vaniman, D AU - Berger, G AU - Cousin, A AU - Deflores, L AU - Lanza, N L AU - Lasue, Jeremie AU - Lewin, E AU - Meslin, P Y AU - Pinet, P AU - Schroeder, S AU - Leveille, R AU - Fisk, M R AU - Blank, J G AU - Melikechi, Noureddine AU - Mezzacappa, A AU - Grotzinger, J P AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1171 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - magnesium KW - igneous rocks KW - Mars KW - Bradbury Rise KW - iron KW - Gale Crater KW - sedimentary rocks KW - barium KW - aluminum KW - Curiosity Rover KW - trace elements KW - chemical composition KW - ChemCam instrument KW - alkaline earth metals KW - textures KW - lithium KW - rubidium KW - alkali metals KW - clasts KW - sodium KW - conglomerate KW - terrestrial planets KW - provenance KW - planets KW - titanium KW - metals KW - potassium KW - Mars Science Laboratory KW - clastic rocks KW - strontium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576535?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Chemical+and+textural+observations+by+ChemCam+of+conglomerates+in+Gale+Crater&rft.au=Wiens%2C+R+C%3BMangold%2C+N%3BForni%2C+Olivier%3BOllila%2C+A%3BJohnson%2C+J+R%3BSautter%2C+V%3BMaurice%2C+S%3BClegg%2C+S+M%3BBlaney%2C+Diana+L%3BLe+Mouelic%2C+Stephane%3BAnderson%2C+R+B%3BBridges%2C+N+T%3BClark%2C+B+C%3BDromart%2C+G%3Bd%27Uston%2C+C%3BFabre%2C+C%3BGasnault%2C+Olivier%3BHerkenhoff%2C+K+E%3BLangevin%2C+Y%3BNewsom%2C+H%3BVaniman%2C+D%3BBerger%2C+G%3BCousin%2C+A%3BDeflores%2C+L%3BLanza%2C+N+L%3BLasue%2C+Jeremie%3BLewin%2C+E%3BMeslin%2C+P+Y%3BPinet%2C+P%3BSchroeder%2C+S%3BLeveille%2C+R%3BFisk%2C+M+R%3BBlank%2C+J+G%3BMelikechi%2C+Noureddine%3BMezzacappa%2C+A%3BGrotzinger%2C+J+P%3BAnonymous&rft.aulast=Wiens&rft.aufirst=R&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1171.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Accessed on Jul. 8, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; aluminum; barium; Bradbury Rise; ChemCam instrument; chemical composition; clastic rocks; clasts; conglomerate; Curiosity Rover; Gale Crater; igneous rocks; iron; lithium; magnesium; Mars; Mars Science Laboratory; metals; planets; potassium; provenance; rubidium; sedimentary rocks; sodium; strontium; terrestrial planets; textures; titanium; trace elements ER - TY - JOUR T1 - Effects of distance correction on ChemCam LIBS measurements (sols 13 to 360) AN - 1752576439; 2016-002541 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Mezzacappa, A AU - Melikechi, Noureddine AU - Cousin, A AU - Lasue, Jeremie AU - Lanza, N L AU - Wiens, R C AU - Clegg, S M AU - Maurice, S AU - Bender, S AU - Berger, G AU - Forni, Olivier AU - Gasnault, Olivier AU - Newsom, H AU - Ollila, A M AU - Clark, B C AU - Dyar, M D AU - Blaney, Diana L AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1517 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - ChemCam instrument KW - statistical analysis KW - Mars KW - calibration KW - emission spectra KW - terrestrial planets KW - planets KW - Curiosity Rover KW - Mars Science Laboratory KW - LIBS spectra KW - spectra KW - corrections KW - regression analysis KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576439?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Effects+of+distance+correction+on+ChemCam+LIBS+measurements+%28sols+13+to+360%29&rft.au=Mezzacappa%2C+A%3BMelikechi%2C+Noureddine%3BCousin%2C+A%3BLasue%2C+Jeremie%3BLanza%2C+N+L%3BWiens%2C+R+C%3BClegg%2C+S+M%3BMaurice%2C+S%3BBender%2C+S%3BBerger%2C+G%3BForni%2C+Olivier%3BGasnault%2C+Olivier%3BNewsom%2C+H%3BOllila%2C+A+M%3BClark%2C+B+C%3BDyar%2C+M+D%3BBlaney%2C+Diana+L%3BAnonymous&rft.aulast=Mezzacappa&rft.aufirst=A&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1517.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 8 N1 - PubXState - TX N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Accessed on July 7, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calibration; ChemCam instrument; corrections; Curiosity Rover; emission spectra; LIBS spectra; Mars; Mars Science Laboratory; planets; regression analysis; spectra; statistical analysis; terrestrial planets ER - TY - JOUR T1 - Determining grain characteristics in the Shaler outcrop with ChemCam Remote Micro-Imager mosaics AN - 1752576298; 2016-002518 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Williams, Amy J AU - Williams, J M AU - Anderson, R B AU - Edgar, L A AU - Newsom, H AU - Le Mouelic, Stephane AU - Minitti, M AU - Weins, R AU - Maurice, S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2342 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - imagery KW - Glenelg Member KW - Shaler Member KW - sandstone KW - pebbles KW - Mars KW - sedimentary rocks KW - mosaics KW - sediments KW - sorting KW - sedimentary structures KW - cross-bedding KW - ChemCam instrument KW - laminations KW - clastic sediments KW - grain size KW - Yellowknife Bay Formation KW - Remote Micro-Imager KW - clasts KW - terrestrial planets KW - planets KW - planar bedding structures KW - clastic rocks KW - facies KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576298?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Determining+grain+characteristics+in+the+Shaler+outcrop+with+ChemCam+Remote+Micro-Imager+mosaics&rft.au=Williams%2C+Amy+J%3BWilliams%2C+J+M%3BAnderson%2C+R+B%3BEdgar%2C+L+A%3BNewsom%2C+H%3BLe+Mouelic%2C+Stephane%3BMinitti%2C+M%3BWeins%2C+R%3BMaurice%2C+S%3BAnonymous&rft.aulast=Williams&rft.aufirst=Amy&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2342.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 15 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jul. 1, 2015 N1 - Last updated - 2016-05-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - ChemCam instrument; clastic rocks; clastic sediments; clasts; cross-bedding; facies; Glenelg Member; grain size; imagery; laminations; Mars; mosaics; pebbles; planar bedding structures; planets; Remote Micro-Imager; sandstone; sedimentary rocks; sedimentary structures; sediments; Shaler Member; sorting; terrestrial planets; Yellowknife Bay Formation ER - TY - JOUR T1 - An overview of the Los Alamos PHO mitigation project AN - 1734266307; 2015-108192 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Weaver, R P AU - Gisler, G R AU - Plesko, C S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1107 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - United States KW - programs KW - asteroids KW - explosions KW - New Mexico KW - Los Alamos County New Mexico KW - Los Alamos National Laboratory KW - simulation KW - potentially hazardous objects KW - mitigation KW - Earth-crossing orbits KW - comets KW - natural hazards KW - hydrodynamics KW - nuclear explosions KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734266307?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=An+overview+of+the+Los+Alamos+PHO+mitigation+project&rft.au=Weaver%2C+R+P%3BGisler%2C+G+R%3BPlesko%2C+C+S%3BAnonymous&rft.aulast=Weaver&rft.aufirst=R&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1107.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 7 N1 - PubXState - TX N1 - SuppNotes - Accessed on Jun. 9, 2015 N1 - Last updated - 2015-11-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - asteroids; comets; Earth-crossing orbits; explosions; hydrodynamics; Los Alamos County New Mexico; Los Alamos National Laboratory; mitigation; natural hazards; New Mexico; nuclear explosions; potentially hazardous objects; programs; simulation; United States ER - TY - JOUR T1 - Siderophile element abundances in Karavannoe; implications for the origin of the Eagle Station pallasites AN - 1734264290; 2015-108170 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Humayun, M AU - Teplyakova, S N AU - Lorenz, C A AU - Ivanova, M A AU - Korochantsev, A V AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2293 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - stony meteorites KW - cobalt KW - copper KW - mass spectra KW - kamacite KW - CV chondrites KW - iron KW - Eagle Station Meteorite KW - meteorites KW - tungsten KW - taenite KW - alloys KW - spectra KW - gold KW - chondrites KW - stony irons KW - Karavannoe Meteorite KW - gallium KW - plessite KW - arsenic KW - siderophile elements KW - carbonaceous chondrites KW - ICP mass spectra KW - metals KW - germanium KW - nickel KW - pallasite KW - chemical fractionation KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734264290?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Siderophile+element+abundances+in+Karavannoe%3B+implications+for+the+origin+of+the+Eagle+Station+pallasites&rft.au=Humayun%2C+M%3BTeplyakova%2C+S+N%3BLorenz%2C+C+A%3BIvanova%2C+M+A%3BKorochantsev%2C+A+V%3BAnonymous&rft.aulast=Humayun&rft.aufirst=M&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2293.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Jun. 8, 2015 N1 - Last updated - 2015-11-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alloys; arsenic; carbonaceous chondrites; chemical fractionation; chondrites; cobalt; copper; CV chondrites; Eagle Station Meteorite; gallium; germanium; gold; ICP mass spectra; iron; kamacite; Karavannoe Meteorite; mass spectra; metals; meteorites; nickel; pallasite; plessite; siderophile elements; spectra; stony irons; stony meteorites; taenite; tungsten ER - TY - JOUR T1 - The response of meteoritic and cometary materials to neutron bombardment AN - 1734264082; 2015-108191 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Plesko, C S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2846 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - CI chondrites KW - stony meteorites KW - Stardust Mission KW - isotopes KW - explosions KW - refractory materials KW - porous materials KW - carbonaceous chondrites KW - depth KW - models KW - meteorites KW - mitigation KW - comets KW - neutrons KW - Hayabusa Mission KW - natural hazards KW - nuclear explosions KW - chondrites KW - regolith KW - energy KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734264082?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=The+response+of+meteoritic+and+cometary+materials+to+neutron+bombardment&rft.au=Plesko%2C+C+S%3BAnonymous&rft.aulast=Plesko&rft.aufirst=C&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2846.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 10 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jun. 9, 2015 N1 - Last updated - 2015-11-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - carbonaceous chondrites; chondrites; CI chondrites; comets; depth; energy; explosions; Hayabusa Mission; isotopes; meteorites; mitigation; models; natural hazards; neutrons; nuclear explosions; porous materials; refractory materials; regolith; Stardust Mission; stony meteorites ER - TY - JOUR T1 - Identifying potentially hazardous 50-m class co-orbiting materials associated with known "safe" near-Earth objects AN - 1734263616; 2015-108193 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Lai, H R AU - Russell, C T AU - Wei, H Y AU - Delzanno, G L AU - Connors, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1560 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - near-Earth objects KW - asteroids KW - near-Earth asteroids KW - orbits KW - parent bodies KW - statistical analysis KW - interplanetary space KW - magnetic field KW - size KW - mass KW - spatial distribution KW - Earth-crossing orbits KW - detection KW - identification KW - natural hazards KW - dimensions KW - probability KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734263616?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Identifying+potentially+hazardous+50-m+class+co-orbiting+materials+associated+with+known+%22safe%22+near-Earth+objects&rft.au=Lai%2C+H+R%3BRussell%2C+C+T%3BWei%2C+H+Y%3BDelzanno%2C+G+L%3BConnors%2C+M%3BAnonymous&rft.aulast=Lai&rft.aufirst=H&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/1560.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 3 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jun. 9, 2015 N1 - Last updated - 2015-11-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - asteroids; detection; dimensions; Earth-crossing orbits; identification; interplanetary space; magnetic field; mass; natural hazards; near-Earth asteroids; near-Earth objects; orbits; parent bodies; probability; size; spatial distribution; statistical analysis ER - TY - JOUR T1 - Uranium remediation at an in situ recovery (ISR) site; isotope ratios as indicators of reducing environments AN - 1729848424; 2015-103603 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Basu, A AU - Brown, S T AU - Christensen, J N AU - DePaolo, D J AU - Reimus, P W AU - Heikoop, J AU - Schilling, K AU - Johnson, T M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 135 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - mineral deposits, genesis KW - isotope fractionation KW - selenium KW - isotopes KW - roll-type deposits KW - Se-82/Se-76 KW - stable isotopes KW - remediation KW - attenuation KW - radioactive isotopes KW - Rosita Texas KW - reduction KW - Duval County Texas KW - alkaline earth metals KW - toxic materials KW - experimental studies KW - in situ KW - pollutants KW - isotope ratios KW - pollution KW - Texas KW - ore bodies KW - recovery KW - Sr-87/Sr-86 KW - detection KW - S-34/S-32 KW - metals KW - sulfur KW - uranium KW - U-238/U-234 KW - actinides KW - strontium KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729848424?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Uranium+remediation+at+an+in+situ+recovery+%28ISR%29+site%3B+isotope+ratios+as+indicators+of+reducing+environments&rft.au=Basu%2C+A%3BBrown%2C+S+T%3BChristensen%2C+J+N%3BDePaolo%2C+D+J%3BReimus%2C+P+W%3BHeikoop%2C+J%3BSchilling%2C+K%3BJohnson%2C+T+M%3BAnonymous&rft.aulast=Basu&rft.aufirst=A&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=135&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Last updated - 2015-11-05 N1 - SubjectsTermNotLitGenreText - actinides; alkaline earth metals; attenuation; detection; Duval County Texas; experimental studies; in situ; isotope fractionation; isotope ratios; isotopes; metals; mineral deposits, genesis; ore bodies; pollutants; pollution; radioactive isotopes; recovery; reduction; remediation; roll-type deposits; Rosita Texas; S-34/S-32; Se-82/Se-76; selenium; Sr-87/Sr-86; stable isotopes; strontium; sulfur; Texas; toxic materials; U-238/U-234; United States; uranium ER - TY - JOUR T1 - Chemical stratigraphy of the Yellowknife Bay Formation and use of LIBS and APXS in characterizing Martian strata AN - 1707525092; 2015-080152 AB - ChemCam is a remote sensing instrument on the Mars Science Laboratory (MSL) Curiosity rover. ChemCam relies on Laser-Induced Breakdown Spectroscopy (LIBS) to provide elemental composition from 1.3 to 7 m, and a micro-camera to return context images. The ChemCam LIBS instrument yields semi-quantitative analyses for major and some minor and trace elements (e.g., Ba, Rb, Sr, Li). Spinoff of ChemCam-LIBS technology for use in the oil and gas industry is in advanced development. ChemCam data (several ten thousands of shots) constrain the compositions of siliciclastic sedimentary rocks exposed through the nearly equal 5 m thick section of the Yellowknife Bay formation (YB) in Gale Crater. The YB formation likely was deposited in a prograding alluvial fan fluvio-lacustrine depositional system. The YB formation is subdivided into four members which are, in ascending order: Sheepbed member (bedded mudstones); Gillespie Lake member (medium- to very coarse-grained sandstones); Point Lake member (enigmatic vuggy sandstones); Shaler member (cross-bedded sandstones and recessive finer-grained sediments). Compositions of Sheepbed/Gillespie siliciclastics, including saponitic mudstones, correspond to iron-rich basalts, with no more than 1-2% SO3 on average, but with elevated Cl (> or =1%) consistent with the presence of perchlorate/akaganeite salts. In contrast, Point Lake/ Shaler have bulk compositions that show lower relative amounts of FeOT+MgO and higher K2O in some samples. Both major and trace elements exhibit stratigraphic trends, for example the Point Lake and Shaler members show higher K2O/Al2O3 compared to the Sheepbed and Gillespie Lake members, signaling a change in provenance to include more alkali-rich basalts. Stratigraphic variations in Cr/Ni versus Zn/Ni indicate that Point Lake and Shaler have higher and more variable ratios than the Sheepbed, related to combinations of elevated Zn and Cr and lower Ni. In Shaler sandstones, Ni is similarly low ( nearly equal 200 ppm) as in the Gillespie Lake sandstones but Cr reaches very high levels (>5,000 ppm) consistent with the heavy mineral chromite. Lithium data reveal that Sheepbed mudstones are low and uniform in abundance whereas overlying units are higher and much more variable. JF - Abstracts: Annual Meeting - American Association of Petroleum Geologists AU - Dromart, Gilles AU - Maurice, Sylvestre AU - Saccoccio, Muriel AU - Wiens, Roger AU - Gellert, Ralf AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 PB - American Association of Petroleum Geologists and Society for Sedimentary Geology, Tulsa, OK VL - 2014 KW - laser methods KW - Shaler Member KW - siliciclastics KW - Mars KW - Sheepbed Member KW - Gale Crater KW - emission spectra KW - Mars Exploration Rover KW - sedimentary rocks KW - major elements KW - Curiosity Rover KW - stratigraphic units KW - LIBS spectra KW - ChemCam KW - spectra KW - depositional environment KW - trace elements KW - Point Lake Member KW - minor elements KW - Yellowknife Bay Formation KW - terrestrial planets KW - planets KW - Gillespie Lake Member KW - alluvial fans KW - instruments KW - remote sensing KW - 02C:Geochemistry of rocks, soils, and sediments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707525092?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts%3A+Annual+Meeting+-+American+Association+of+Petroleum+Geologists&rft.atitle=Chemical+stratigraphy+of+the+Yellowknife+Bay+Formation+and+use+of+LIBS+and+APXS+in+characterizing+Martian+strata&rft.au=Dromart%2C+Gilles%3BMaurice%2C+Sylvestre%3BSaccoccio%2C+Muriel%3BWiens%2C+Roger%3BGellert%2C+Ralf%3BAnonymous&rft.aulast=Dromart&rft.aufirst=Gilles&rft.date=2014-01-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts%3A+Annual+Meeting+-+American+Association+of+Petroleum+Geologists&rft.issn=&rft_id=info:doi/ L2 - http://www.searchanddiscovery.com/abstracts/html/2014/90189ace/abstracts/1839501.html LA - English DB - GeoRef N1 - Conference title - AAPG 2014 annual convention & exhibition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States N1 - Date revised - 2015-01-01 N1 - PubXState - OK N1 - SuppNotes - Accessed on September 23, 2014 N1 - Last updated - 2015-08-27 N1 - CODEN - #06983 N1 - SubjectsTermNotLitGenreText - alluvial fans; ChemCam; Curiosity Rover; depositional environment; emission spectra; Gale Crater; Gillespie Lake Member; instruments; laser methods; LIBS spectra; major elements; Mars; Mars Exploration Rover; minor elements; planets; Point Lake Member; remote sensing; sedimentary rocks; Shaler Member; Sheepbed Member; siliciclastics; spectra; stratigraphic units; terrestrial planets; trace elements; Yellowknife Bay Formation ER - TY - JOUR T1 - Stable isotopic identification of nitrate sources in a tundra ecosystem, Barrow, AK AN - 1707524809; 2015-080959 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Heikoop, J M AU - Newman, B D AU - Throckmorton, H M AU - Perkins, G B AU - Gard, M O AU - Iversen, C M AU - Wilson, C J AU - Wullschleger, S D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 954 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - permafrost KW - degradation KW - oxygen KW - isotopes KW - tundra KW - aliphatic hydrocarbons KW - ecosystems KW - periglacial features KW - stable isotopes KW - Barrow Alaska KW - nitrogen KW - carbon dioxide KW - nitrate ion KW - polygons KW - N-15/N-14 KW - methane KW - snowmelt KW - isotope ratios KW - O-18/O-16 KW - alkanes KW - ice wedges KW - organic compounds KW - identification KW - hydrocarbons KW - Alaska KW - glacial geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707524809?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Stable+isotopic+identification+of+nitrate+sources+in+a+tundra+ecosystem%2C+Barrow%2C+AK&rft.au=Heikoop%2C+J+M%3BNewman%2C+B+D%3BThrockmorton%2C+H+M%3BPerkins%2C+G+B%3BGard%2C+M+O%3BIversen%2C+C+M%3BWilson%2C+C+J%3BWullschleger%2C+S+D%3BAnonymous&rft.aulast=Heikoop&rft.aufirst=J&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=954&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmid 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 1 N1 - Last updated - 2015-08-27 N1 - SubjectsTermNotLitGenreText - Alaska; aliphatic hydrocarbons; alkanes; Barrow Alaska; carbon dioxide; degradation; ecosystems; glacial geology; hydrocarbons; ice wedges; identification; isotope ratios; isotopes; methane; N-15/N-14; nitrate ion; nitrogen; O-18/O-16; organic compounds; oxygen; periglacial features; permafrost; polygons; snowmelt; stable isotopes; tundra; United States ER - TY - JOUR T1 - Nickel-Reflected Plutonium Metal Sphere Subcriticai Measurements AN - 1705092174; PQ0001263162 AB - Neutron noise measurements performed with a known benchmarked system are particularly important regarding the safety task of reactivity control for subcriticai assemblies. Indeed, the neutron data collected in such experiments can lead to the multiplication of the system, a quantity which is directly related to the reactivity of the assembly. These integral experiments can also be of great interest for the nuclear data community. JF - Transactions of the American Nuclear Society AU - Richard, Benoit AU - Hutchinson, Jesson AU - Cutler, Theresa AU - Sood, Avneet AU - Smith-Neison, Mark AD - Los Alamos National Laboratory, P.O. Box 1663 MS P365, Los Alamos, NM 87545, benoit_richard@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 879 EP - 882 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Health & Safety Science Abstracts KW - Metals KW - Plutonium KW - Safety KW - Noise levels KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1705092174?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Nickel-Reflected+Plutonium+Metal+Sphere+Subcriticai+Measurements&rft.au=Richard%2C+Benoit%3BHutchinson%2C+Jesson%3BCutler%2C+Theresa%3BSood%2C+Avneet%3BSmith-Neison%2C+Mark&rft.aulast=Richard&rft.aufirst=Benoit&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=879&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2015-09-03 N1 - SubjectsTermNotLitGenreText - Metals; Plutonium; Safety; Noise levels ER - TY - JOUR T1 - Energy dispersive neutron imaging of nuclear fuel pellets AN - 1703690203; 2015-078376 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Losko, A S AU - Vogel, S C AU - Tremsin, A S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1518 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - safety KW - nuclear energy KW - materials KW - three-dimensional models KW - power plants KW - demand KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703690203?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Energy+dispersive+neutron+imaging+of+nuclear+fuel+pellets&rft.au=Losko%2C+A+S%3BVogel%2C+S+C%3BTremsin%2C+A+S%3BAnonymous&rft.aulast=Losko&rft.aufirst=A&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1518&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt abstracts 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Last updated - 2015-08-13 N1 - SubjectsTermNotLitGenreText - demand; materials; nuclear energy; power plants; safety; three-dimensional models ER - TY - JOUR T1 - A ten million SPH particle simulation of the origin of obliquity of Uranus AN - 1703685835; 2015-077779 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Teodoro, Luis F A AU - Korycansky, Donald G AU - Warren, Michael AU - Fryer, Christopher AU - Rockefeller, Gabriel AU - Zahnle, Kevin AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2542 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - planets KW - angular momentum KW - obliquity of the ecliptic KW - Uranus KW - orbits KW - hydrodynamics KW - outer planets KW - simulation KW - giant planets KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703685835?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=A+ten+million+SPH+particle+simulation+of+the+origin+of+obliquity+of+Uranus&rft.au=Teodoro%2C+Luis+F+A%3BKorycansky%2C+Donald+G%3BWarren%2C+Michael%3BFryer%2C+Christopher%3BRockefeller%2C+Gabriel%3BZahnle%2C+Kevin%3BAnonymous&rft.aulast=Teodoro&rft.aufirst=Luis+F&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/2542.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - SuppNotes - Accessed on Mar. 23, 2015 N1 - Last updated - 2015-11-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - angular momentum; giant planets; hydrodynamics; obliquity of the ecliptic; orbits; outer planets; planets; simulation; Uranus ER - TY - JOUR T1 - Parameterization of basal friction near grounding lines in a one-dimensional ice sheet model AN - 1696876977; 2015-068872 AB - Ice sheets and ice shelves are linked by the transition zone, the region where flow dominated by vertical shear stress makes a transition to flow dominated by extensional stress. Adequate resolution of the transition zone is necessary for numerically accurate ice sheet-ice shelf simulations. The required resolution depends on how the basal physics is parameterized. We propose a new, simple parameterization of the effective pressure near the grounding line, combined with an existing friction law linking effective pressure to basal stress and sliding, in a one-dimensional, fixed-grid, vertically integrated model. This parameterization represents connectivity between the basal hydrological system and the ocean in the transition zone. Our model produces a smooth transition between finite basal friction in the ice sheet and zero basal friction in the ice shelf. In a set of experiments based on the Marine Ice Sheet Model Intercomparison Project (MISMIP), we show that with a smoother basal shear stress, the model yields accurate steady-state results at a fixed-grid resolution of approximately 1 km. JF - The Cryosphere (Online) AU - Leguy, G R AU - Asay-Davis, X S AU - Lipscomb, W H Y1 - 2014 PY - 2014 DA - 2014 SP - 1239 EP - 1259 PB - Copernicus on behalf of the European Geosciences Union, Katlenburg-Lindau VL - 8 IS - 4 KW - grounding line KW - shallow-shelf flowline model KW - ice softness KW - sea ice KW - East Antarctic ice sheet KW - data processing KW - ice shelves KW - topography KW - errors KW - MISMIP KW - West Antarctic ice sheet KW - basal friction KW - subglacial environment KW - numerical models KW - clastic sediments KW - advance-and-retreat cycles KW - numerical analysis KW - stress KW - effective pressure KW - equations KW - geometry KW - Antarctic ice sheet KW - sea-level changes KW - mathematical methods KW - theoretical models KW - glacial geology KW - gravity flows KW - boundary-layer model KW - sea water KW - hysteresis KW - subglacial processes KW - shear stress KW - one-dimensional models KW - Marine Ice Sheet Model Intercomparison Project KW - limitations KW - fixed-grid model KW - simulation KW - grounding line parameterization KW - water pressure KW - theoretical studies KW - ice streams KW - ice KW - Chebyshev method KW - sediments KW - bedrock KW - glaciers KW - mathematical models KW - till KW - ice sheets KW - ice movement KW - Antarctica KW - regional KW - calving KW - marine ice-sheet models KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696876977?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Cryosphere+%28Online%29&rft.atitle=Parameterization+of+basal+friction+near+grounding+lines+in+a+one-dimensional+ice+sheet+model&rft.au=Leguy%2C+G+R%3BAsay-Davis%2C+X+S%3BLipscomb%2C+W+H&rft.aulast=Leguy&rft.aufirst=G&rft.date=2014-01-01&rft.volume=8&rft.issue=4&rft.spage=1239&rft.isbn=&rft.btitle=&rft.title=The+Cryosphere+%28Online%29&rft.issn=1994-0424&rft_id=info:doi/10.5194%2Ftc-8-1239-2014 L2 - http://www.the-cryosphere.net/volumes_and_issues.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2015-01-01 N1 - Number of references - 49 N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-11-19 N1 - SubjectsTermNotLitGenreText - advance-and-retreat cycles; Antarctic ice sheet; Antarctica; basal friction; bedrock; boundary-layer model; calving; Chebyshev method; clastic sediments; data processing; East Antarctic ice sheet; effective pressure; equations; errors; fixed-grid model; geometry; glacial geology; glaciers; gravity flows; grounding line; grounding line parameterization; hysteresis; ice; ice movement; ice sheets; ice shelves; ice softness; ice streams; limitations; Marine Ice Sheet Model Intercomparison Project; marine ice-sheet models; mathematical methods; mathematical models; MISMIP; numerical analysis; numerical models; one-dimensional models; regional; sea ice; sea water; sea-level changes; sediments; shallow-shelf flowline model; shear stress; simulation; stress; subglacial environment; subglacial processes; theoretical models; theoretical studies; till; topography; water pressure; West Antarctic ice sheet DO - http://dx.doi.org/10.5194/tc-8-1239-2014 ER - TY - JOUR T1 - High-precision Os isotopes of CV-CK carbonaceous chondrites AN - 1696875857; 2015-068762 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Goderis, S AU - Brandon, A D AU - Humayun, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 818 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - processes KW - precision KW - stony meteorites KW - isotopes KW - parent bodies KW - Os-190 KW - carbonaceous chondrites KW - CV chondrites KW - platinum group KW - metamorphism KW - Os-188/Os-186 KW - meteorites KW - Os-186 KW - mineral composition KW - metals KW - grade KW - CK chondrites KW - osmium KW - Os-188 KW - chondrites KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875857?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=High-precision+Os+isotopes+of+CV-CK+carbonaceous+chondrites&rft.au=Goderis%2C+S%3BBrandon%2C+A+D%3BHumayun%2C+M%3BAnonymous&rft.aulast=Goderis&rft.aufirst=S&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=818&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 11 N1 - Last updated - 2015-07-17 N1 - SubjectsTermNotLitGenreText - carbonaceous chondrites; chondrites; CK chondrites; CV chondrites; grade; isotopes; metals; metamorphism; meteorites; mineral composition; Os-186; Os-188; Os-188/Os-186; Os-190; osmium; parent bodies; platinum group; precision; processes; stony meteorites ER - TY - JOUR T1 - SP2 analysis of black carbon from biomass burning and diesel emissions AN - 1692744926; 2015-063183 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Aiken, A C AU - Liu, S AU - Dubey, M K AU - McMeeking, G AU - Yokelson, B AU - Shilling, J AU - Zaveri, R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 16 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - experimental studies KW - biomass KW - global change KW - petroleum products KW - combustion KW - atomic absorption spectra KW - fires KW - laboratory studies KW - absorption KW - photometry KW - black carbon KW - mixing KW - carbon KW - diesel fuel KW - spectra KW - global warming KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692744926?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=SP2+analysis+of+black+carbon+from+biomass+burning+and+diesel+emissions&rft.au=Aiken%2C+A+C%3BLiu%2C+S%3BDubey%2C+M+K%3BMcMeeking%2C+G%3BYokelson%2C+B%3BShilling%2C+J%3BZaveri%2C+R%3BAnonymous&rft.aulast=Aiken&rft.aufirst=A&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=16&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Last updated - 2015-07-02 N1 - SubjectsTermNotLitGenreText - absorption; atomic absorption spectra; biomass; black carbon; carbon; combustion; diesel fuel; experimental studies; fires; global change; global warming; laboratory studies; mixing; petroleum products; photometry; spectra ER - TY - JOUR T1 - MCNP6 Enhancements to Alpha Particle Production and Transport AN - 1692330088; PQ0001263239 AB - Recent interest in improved alpha-particle production and transport as well as the availability of ACE alpha cross-section data has led to several new features in the all-energy, all-particle transport code MCNP. In early 2004, work began on a physics model that would use the CINDER90 depletion code in conjunction with a delayed-particle library to allow for production of delayed neutrons, gammas, and betas and has recently been expanded to allow for delayed alpha production.[1] Delayed-neutrons data can be sampled from two sources by using the DN keyword on the ACT card.[2] The sampling may be taken from ACE library data for fission only or model data for fission and/or activation. There are also options to use a combination of both and to treat all neutrons as prompt. JF - Transactions of the American Nuclear Society AU - McMath, G E AU - McKinney, G W AD - Los Alamos National Laboratory, P.O.Box 1663 MS C921, Los Alamos, NM, 87545 Y1 - 2014 PY - 2014 DA - 2014 SP - 1173 EP - 1176 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Alpha particles KW - Activation KW - Libraries KW - Availability KW - Transport KW - Cross sections (physics) KW - Sampling KW - Fission UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692330088?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=MCNP6+Enhancements+to+Alpha+Particle+Production+and+Transport&rft.au=McMath%2C+G+E%3BMcKinney%2C+G+W&rft.aulast=McMath&rft.aufirst=G&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1173&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-12-07 ER - TY - JOUR T1 - Impact of Improved Experimental Uncertainty Quantification on the Evaluated super(239)Pu Prompt Fission Neutron Spectrum AN - 1692321844; PQ0001263300 AB - Nuclear data evaluations provide a best estimate of nuclear physics observables such as prompt fission neutron spectra (PFNS) or cross sections relevant for nuclear data applications. These evaluated data are often obtained by combining differential measurements of the quantity itself and nuclear model predictions by means of statistical methods. Nuclear model codes rely on knowledge from nuclear theory and auxiliary experimental data to constrain model input parameters. The evaluated data are used in benchmark calculations and are tested against the associated measured integral benchmark quantity such as e.g. Kappa sub(eff) of critical assemblies. Evaluated data are assembled in general nuclear data libraries (e.g., ENDF/B-VII.1 [1] in the US) and application-specific libraries like the COMMARA-2.1 covariance library, which provides covariances for materials relevant for advanced fast reactor applications [2]. JF - Transactions of the American Nuclear Society AU - Neudecker, Denise AU - Talou, Patrick AU - Kawano, Toshihiko AD - Theoretical Division, Los Alamos National Laboratory, PO. Box 1663, Los Alamos, NM dneudecker@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 1415 EP - 1418 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear fission KW - Estimates KW - Nuclear models KW - Mathematical models KW - Libraries KW - Nuclear reactor components KW - Benchmarking KW - Statistical methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692321844?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Impact+of+Improved+Experimental+Uncertainty+Quantification+on+the+Evaluated+super%28239%29Pu+Prompt+Fission+Neutron+Spectrum&rft.au=Neudecker%2C+Denise%3BTalou%2C+Patrick%3BKawano%2C+Toshihiko&rft.aulast=Neudecker&rft.aufirst=Denise&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1415&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-12-07 ER - TY - JOUR T1 - Direct Imaging of a Godiva IV Burst at NCERC AN - 1692317671; PQ0001263268 AB - Air (Nitrogen) fluorescence by radiation has been studied for some time [1]. We have considered a number of diagnostic techniques for characterizing the operation of Godiva IV. We are investigating the possible air fluorescence in the optical region by a Godiva IV burst. Los Alamos National Laboratory (LANL) scientists previously recorded this phenomenon during the initial commissioning of Godiva IV at Pajarito Site [2]. We are working toward recording the same effect at NCERC now that Godiva IV has been restarted. JF - Transactions of the American Nuclear Society AU - Goettee, J D AU - Esch, E I AU - Goda, J M AU - Hayes, D K AU - Mayo, D R AU - Myers, W L AD - Los Alamos National Laboratory, MS J570, Los Alamos, NM, 87545 goettee@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 1287 EP - 1289 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Commissioning KW - Bursting KW - Chromium molybdenum steels KW - Scientists KW - Fluorescence KW - High strength steels KW - Diagnostic systems KW - Recording UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692317671?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Direct+Imaging+of+a+Godiva+IV+Burst+at+NCERC&rft.au=Goettee%2C+J+D%3BEsch%2C+E+I%3BGoda%2C+J+M%3BHayes%2C+D+K%3BMayo%2C+D+R%3BMyers%2C+W+L&rft.aulast=Goettee&rft.aufirst=J&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1287&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - New Hash-based Energy Lookup Algorithm for Monte Carlo Codes AN - 1692317575; PQ0001263109 AB - This note provides a new algorithm for energy lookups during the construction of material cross-sections in a continuous-energy Monte Carlo code. A new hash-based energy lookup algorithm provides speedups of 15-20x over conventional schemes and requires about 1,000x less memory than unified grid methods. The hashing scheme is based on a log-energy grid and provides search bounds for each isotope that greatly reduce the lengths of energy table searches. It should be useful to code developers for optimizing the performance of any Monte Carlo code for particle transport. JF - Transactions of the American Nuclear Society AU - Brown, Forrest B AD - Los Alamos National Laboratory, Los Alamos, NM fbrown@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 659 EP - 663 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Energy (nuclear) KW - Monte Carlo methods KW - Grid method KW - Algorithms KW - Searching KW - Tables (data) KW - Optimization KW - Cross sections UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692317575?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=New+Hash-based+Energy+Lookup+Algorithm+for+Monte+Carlo+Codes&rft.au=Brown%2C+Forrest+B&rft.aulast=Brown&rft.aufirst=Forrest&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=659&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - A Verification of MCNP6 FMESH Tally Capabilities AN - 1692316813; PQ0001263231 AB - MCNP6 is a Monte Carlo physics code with many capabilities, such as criticality calculations, flux-to-dose conversions, and radiography [1]. For the latter application, MCNP6 uses FMESH tallies to conduct imaging simulations. These tallies place a voxel mesh over a volume (such as a detector) and divide the total particle track length by the voxel volume to generate the particle fluence in each voxel [2]. Tallies are then plotted to form simulated images. However, because FMESH tallies do not have some of the same statistical checks as other routines in MCNP6, it is important that studies are conducted to ensure FMESH tallies are properly representing the physics and statistics of particle interactions. JF - Transactions of the American Nuclear Society AU - Swift, Alicia L AU - McKigney, Edward A AU - Schirato, Richard C AU - Robinson, Alex P AU - Temple, Brian A AD - Los Alamos National Laboratory, Los Alamos, New Mexico alicia.swift@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 1141 EP - 1144 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Particle interactions KW - Particle tracks KW - Statistics KW - Computer simulation KW - Monte Carlo methods KW - Conversion KW - Radiography KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692316813?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=A+Verification+of+MCNP6+FMESH+Tally+Capabilities&rft.au=Swift%2C+Alicia+L%3BMcKigney%2C+Edward+A%3BSchirato%2C+Richard+C%3BRobinson%2C+Alex+P%3BTemple%2C+Brian+A&rft.aulast=Swift&rft.aufirst=Alicia&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1141&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - An Assessment of the Attractiveness of Material Associated with Thorium Fuel Cycles AN - 1692316603; PQ0001263035 AB - Many proponents of the thorium fuel cycle have claimed and are claiming that it is proliferation resistant (see Refs. 1-5). The basis for these claims is that the bred super(233)U is contaminated with super(232)U, which possesses a decay daughter, super(208)T1, with a short half-life of 3 minutes that emits a penetrating 2.6 MeV gamma for 99.75% of the decays.[6] These proponents contend the presence of the super(208)T1 is a proliferation barrier. We disagree with this contention, because the radiation resulting from the presence of super(208)T1 is not a deterrent to adversaries who are not concerned with long-term health and safety. This paper examines the validity of these claims by assessing the material attractiveness, MA, of the special nuclear materials (SNM) bred in the thorium fuel cycle using the prescription of Ref. 7. MA 2 is highly attractive. JF - Transactions of the American Nuclear Society AU - Bathke, Charles G AU - Trellue, Holly R AU - Ebbinghaus, Bartley B AU - Collins, Brian A AU - Prichard, Andrew W AU - Smith, Brian W AD - Los Alamos National Laboratory: P.O. Box 1663, Los Alamos, NM 87545, USA Y1 - 2014 PY - 2014 DA - 2014 SP - 383 EP - 386 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Weapons KW - Thorium KW - Assessments KW - Nuclear safety KW - Fuel cycles KW - Emittance KW - Decay KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692316603?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=An+Assessment+of+the+Attractiveness+of+Material+Associated+with+Thorium+Fuel+Cycles&rft.au=Bathke%2C+Charles+G%3BTrellue%2C+Holly+R%3BEbbinghaus%2C+Bartley+B%3BCollins%2C+Brian+A%3BPrichard%2C+Andrew+W%3BSmith%2C+Brian+W&rft.aulast=Bathke&rft.aufirst=Charles&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=383&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - Nuclear Data Processing at LANL with NJOY - Past, Present and Future AN - 1692315868; PQ0001263284 AB - The NJOY Nuclear Data Processing System [1,2,3] is used to process Evaluated Nuclear Data Formatted (ENDF) [4] nuclear data files into application specific (either continuous energy ACE files for MCNP or multi-group files for use with deterministic codes) files. The NJOY code system has been under continuous development at LANL since the mid-1970s, expanding as needed to accommodate enhancements in the ENDF system. JF - Transactions of the American Nuclear Society AU - Kahler, A C AU - MacFarlane, R E AD - Los Alamos National Laboratory, Theoretical Division, P.O. Box 1663, Los Alamos, NM 87545 akahler@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 1351 EP - 1352 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Energy use KW - Energy (nuclear) KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692315868?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Nuclear+Data+Processing+at+LANL+with+NJOY+-+Past%2C+Present+and+Future&rft.au=Kahler%2C+A+C%3BMacFarlane%2C+R+E&rft.aulast=Kahler&rft.aufirst=A&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1351&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - MCNP Sensitivity/Uncertainty Accomplishments for the Nuclear Criticality Safety Program AN - 1692314549; PQ0001263140 AB - The DOE/NNSA Nuclear Criticality Safety Program (NCSP) supports research, development, maintenance, and verification and validation of the MCNP Monte Carlo radiation transport software package [l] for nuclear criticality safety (NCS) customers within DOE/NNSA. In recent years, the NCSP has been funding the development of sensitivity and uncertainty (S/U) capabilities in MCNP. Recent institutional needs at Los Alamos National Laboratory (LANL) related to the validation of MCNP for Pu operations have also spurred further development. JF - Transactions of the American Nuclear Society AU - Kiedrowski, Brian C AU - Brown, Forrest B AU - Bull, Jeffrey S AU - Kahler, Albert C AU - Parsons, D Kent AU - Gonzales, Matthew A AU - Prinja, Anil K AD - Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545 Y1 - 2014 PY - 2014 DA - 2014 SP - 791 EP - 794 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Uncertainty KW - Funding KW - Customers KW - Radiation transport KW - Plutonium KW - Nuclear safety KW - Software packages KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692314549?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=MCNP+Sensitivity%2FUncertainty+Accomplishments+for+the+Nuclear+Criticality+Safety+Program&rft.au=Kiedrowski%2C+Brian+C%3BBrown%2C+Forrest+B%3BBull%2C+Jeffrey+S%3BKahler%2C+Albert+C%3BParsons%2C+D+Kent%3BGonzales%2C+Matthew+A%3BPrinja%2C+Anil+K&rft.aulast=Kiedrowski&rft.aufirst=Brian&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=791&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - Correlated Neutron and Gamma-Ray Emissions in MCNP6 AN - 1692313883; PQ0001263204 AB - A predictive capability to model and design passive and active interrogation systems for special nuclear material (SNM) detection is of great importance to global security and for nuclear nonproliferation applications. One approach to solve some of these problems is to model passive or active interrogation designs in a transport code to predict if and what SNM signatures can be identified. Unfortunately, the set of tabulated data present in modern evaluated nuclear data libraries is limited to average quantities only, such as the average neutron multiplicity, or the average prompt fission neutron spectrum. Quantities such as the prompt neutron multiplicity distribution, or multiplicity-dependent prompt fission neutron spectra are not present. For example when the MCNP 6 [1] transport code is used for a neutron-photon problem in default mode, if a neutron has any kind of reaction (capture, inelastic scatter, fission, etc.) with a material in the problem that has a non-zero total photon production cross section then the emission photons are independently produced from a randomly sampled photon production cross section. JF - Transactions of the American Nuclear Society AU - Rising, Michael E AU - Sood, Avneet AU - Talou, Patrick AU - Stetcu, Ionel AU - Kawano, Toshihiko AD - Los Alamos National Laboratory, MS B283, Los Alamos, NM, 87545, USA mrising@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 1036 EP - 1039 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Solid State and Superconductivity Abstracts (SO); Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear fission KW - Mathematical models KW - Photons KW - Design engineering KW - Transport KW - Interrogation KW - Cross sections KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692313883?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Correlated+Neutron+and+Gamma-Ray+Emissions+in+MCNP6&rft.au=Rising%2C+Michael+E%3BSood%2C+Avneet%3BTalou%2C+Patrick%3BStetcu%2C+Ionel%3BKawano%2C+Toshihiko&rft.aulast=Rising&rft.aufirst=Michael&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1036&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-12-07 ER - TY - JOUR T1 - Non-Parametric, Extreme-Value Method for Estimating Bias and Bias Uncertainty in Nuclear Criticality Safety AN - 1692313504; PQ0001263160 AB - Established national standards (ANSI/ANS-8.1 and - 8.24) require the quantification of bias, the systematic difference between the actual k and what transport calculations with an associated data library predict, and its uncertainty within a defined area of applicability (AOA), a calculational margin [1, 2]. Many standard approaches require that the bias of the underlying set of relevant benchmark critical experiments be normally distributed, which is sometimes true in practice, but other times not. Alternatively, non-parametric approaches may be used regardless of how the biases in the benchmark experiments are distributed [3]. This summary discusses such an approach using extreme-value methods allowing for the weighting of benchmarks based upon factors such as the degree of relevance toward a particular application; a traditional non-parametric, rank-order method does not allow for such weighting. An approach for such a weighting using sensitivity/uncertainty techniques is discussed. Results are then presented that illustrate how the non-parametric method performs. JF - Transactions of the American Nuclear Society AU - Kiedrowski, Brian C AD - Los Alamos National Laboratory, P0O. Box 1663, Los Alamos, NM 87545 bckiedro@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 871 EP - 874 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Uncertainty KW - Weighting KW - Critical experiments KW - Standards KW - Benchmarking KW - Bias KW - Nuclear engineering KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692313504?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Non-Parametric%2C+Extreme-Value+Method+for+Estimating+Bias+and+Bias+Uncertainty+in+Nuclear+Criticality+Safety&rft.au=Kiedrowski%2C+Brian+C&rft.aulast=Kiedrowski&rft.aufirst=Brian&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=871&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - A Review of Recent R&D Efforts in Sub-Critical Multiplication Measurements and Simulations AN - 1692313014; PQ0001263142 AB - Since 2010, a series of radiation detection measurements using special nuclear materials (SNM) have been performed providing an opportunity to validate recent improvements in computational tools used to understand sub-critical multiplication. Additionally, these comparisons can assist in the assessment of fissile materials encountered in unknown systems. Our recent work uses internally developed extensions to the Monte Carlo N-Particle code, MCNP [1], that allow descriptions of correlated fission sources and specifically tally neutron absorption time and location (list-mode) for direct comparisons with measured observables. JF - Transactions of the American Nuclear Society AU - Sood, Avneet AU - Solomon, C J AU - Hutchinson, J D AU - Bahran, Rian AD - Los Alamos National Laboratory, P.O. Box 1663, MS F663, Los Alamos, NM 87545 sooda@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 799 EP - 802 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Multiplication KW - Computer programs KW - Assessments KW - Monte Carlo methods KW - Nuclear fuels KW - Fissile materials KW - Descriptions KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692313014?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=A+Review+of+Recent+R%26amp%3BD+Efforts+in+Sub-Critical+Multiplication+Measurements+and+Simulations&rft.au=Sood%2C+Avneet%3BSolomon%2C+C+J%3BHutchinson%2C+J+D%3BBahran%2C+Rian&rft.aulast=Sood&rft.aufirst=Avneet&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=799&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-12-07 ER - TY - JOUR T1 - Godiva IV Startup at National Criticality Experiments Research Center (NCERC): Delayed Critical through Prompt Critical AN - 1692313002; PQ0001263139 AB - Godiva IV is a fast burst assembly with approximately 65 kg of highly enriched uranium fuel alloyed with 1.5% molybdenum for strength.1 JF - Transactions of the American Nuclear Society AU - Goda, J AU - Bounds, J AU - Hayes, D AU - Sanchez, R AD - Los Alamos National Laboratory: P.O. Box 1663, Los Alamos, NM, 87544 jgoda@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 788 EP - 790 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Bursting KW - Uranium KW - Molybdenum base alloys KW - Nuclear fuels KW - Assembly KW - Enrichment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692313002?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Godiva+IV+Startup+at+National+Criticality+Experiments+Research+Center+%28NCERC%29%3A+Delayed+Critical+through+Prompt+Critical&rft.au=Goda%2C+J%3BBounds%2C+J%3BHayes%2C+D%3BSanchez%2C+R&rft.aulast=Goda&rft.aufirst=J&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=788&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - A Computational Approach to the Dissolver Paradox AN - 1692305185; PQ0001263151 AB - The dissolver paradox, in which a midpoint of the dissolution process has a higher k sub(eff) than either endpoint, has been known to the nuclear criticality safety community since the late 1950s [1]. However, little work has been done on the problem since then, particularly unusual given the large increase in available computing power in the intervening years. This research attempts to extend the previous theoretical analysis of the dissolver paradox, as well as provide a contemporary computational basis for understanding the system in question. JF - Transactions of the American Nuclear Society AU - Kersting, Alyssa R AD - Nuclear Criticality Safety Division, Los Alamos National Laboratory P.0. Box 1663 MS E585, Los Alamos, NM 87545 USA akersting@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 837 EP - 839 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear power generation KW - Computation KW - Communities KW - Paradoxes KW - Nuclear safety KW - Dissolution KW - Dissolvers KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692305185?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=A+Computational+Approach+to+the+Dissolver+Paradox&rft.au=Kersting%2C+Alyssa+R&rft.aulast=Kersting&rft.aufirst=Alyssa&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=837&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-10-05 ER - TY - JOUR T1 - Deciphering the Binning Method Uncertainty in Neutron Multiplicity Measurements AN - 1692303755; PQ0001263154 AB - Neutron multiplicity measurements are important in determining mass, multiplication, and other parameters of fissionable material. In order to determine these parameters, various rates need to be determined and the analytical uncertainty estimation associated with these rates is complex. A simpler method to estimate the uncertainty is to determine the standard deviation from multiple measurements of the same configuration; in lieu of real measurements monte carlo simulations can be performed. JF - Transactions of the American Nuclear Society AU - Cutler, Theresa AU - Smith-Nelson, Mark AU - Hutchinson, Jesson AD - Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, 87544 tcutler@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 846 EP - 849 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Uncertainty KW - Multiplication KW - Estimates KW - Standard deviation KW - Computer simulation KW - Monte Carlo methods KW - Mathematical analysis KW - Fissionable materials UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692303755?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Deciphering+the+Binning+Method+Uncertainty+in+Neutron+Multiplicity+Measurements&rft.au=Cutler%2C+Theresa%3BSmith-Nelson%2C+Mark%3BHutchinson%2C+Jesson&rft.aulast=Cutler&rft.aufirst=Theresa&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=846&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-12-07 ER - TY - JOUR T1 - A New Stochastic Global Optimization Method for Inverse Transport Problems AN - 1692303753; PQ0001263235 AB - Inverse transport problems are problems where radiation signatures are used to identify unknown components of radioactive source/shield systems. For a multi-layered spherical gamma-ray source/shield system, unknown system components may include the number of layers, interface locations, source isotopic compositions, material densities, and shield materials. Inverse transport problems can be solved via an optimization approach whose goal is to find unknown system parameters that minimize a cost difference between the quantities of interest measured from a system and the quantities of interest calculated using a set of postulated parameters. A few optimization methods, such as Levenberg-Marquardt [1, 2] and differential evolution (DE) [3], have been applied to solve inverse transport problems. In [4], we applied a mesh adaptive direct search (MADS) algorithm to solve inverse transport problems where we used an ORTHOMADS algorithm (a deterministic MADS instance) to solve the inverse transport problem of material interface location identification in one-dimensional spherical radiation source/shield systems where all other system parameters are known. JF - Transactions of the American Nuclear Society AU - Armstrong, Jerawan C AU - Favorite, Jeffrey A AD - XCP-3, MS F663, Los Alamos National Laboratory, Los Alamos, NM 87544 USA Y1 - 2014 PY - 2014 DA - 2014 SP - 1157 EP - 1160 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Shields KW - Transport KW - Density KW - Inverse KW - Algorithms KW - Optimization KW - Evolution KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692303753?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=A+New+Stochastic+Global+Optimization+Method+for+Inverse+Transport+Problems&rft.au=Armstrong%2C+Jerawan+C%3BFavorite%2C+Jeffrey+A&rft.aulast=Armstrong&rft.aufirst=Jerawan&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1157&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - Differential Quadrature Approximation of the Angular Derivative Terms in the Curvilinear-Coordinates S sub()NEquations AN - 1692303420; PQ0001263115 AB - We describe the use of the differential quadrature method to discretize the angular derivative terms that appear in the Boltzmann transport equation in curvilinear coordinate systems. This is an alternative to the weighted finite-difference method that is typically used to approximate the angular derivative terms. We present the mathematical underpinnings of the method and show how the equations are solved in conjunction with a discontinuous finite element method (DFEM) spatial discretization of the S sub()Nequations. JF - Transactions of the American Nuclear Society AU - Warsa, J S AU - Prinja, A K AD - Los Alamos National Laboratory, P.O. Box 1663, MS D409, Los Alamos, NM 87545 warsa@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 689 EP - 692 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Derivatives KW - Discretization KW - Quadratures KW - Finite difference method KW - Approximation KW - Mathematical analysis KW - Differential equations KW - Boltzmann transport equation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692303420?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Differential+Quadrature+Approximation+of+the+Angular+Derivative+Terms+in+the+Curvilinear-Coordinates+S+sub%28%29NEquations&rft.au=Warsa%2C+J+S%3BPrinja%2C+A+K&rft.aulast=Warsa&rft.aufirst=J&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=689&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - List-Mode Simulations of the Subcriticai Thor Core Benchmark Sensitivity Experiments AN - 1692303326; PQ0001263143 AB - The fast-neutron spherical Thor core is composed of three 5-phase plutonium-metal components containing 5.1% 240Pu (alloyed with ~1.01 wt% gallium) [1]. In 2005, the Thor core was moved from Los Alamos National Laboratory's Technical Area 18 (TA-18) to the Nevada National Security Site Device Assembly Facility (NNSS-DAF). This move was part of a several-year effort by the National Nuclear Security Administration to transfer sensitive nuclear weapons-usable materials from TA-18 to a higher security location in the Nevada desert [2]. JF - Transactions of the American Nuclear Society AU - Bahran, R AU - Hutchinson, J AU - Richard, B AU - Sood, Avneet AD - Los Alamos National Laboratory, P.O. Box 1663 P365, Los, Alamos, NM 87545 bahran@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 805 EP - 808 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Security KW - Core loss KW - Tantalum KW - Deserts KW - Devices KW - Simulation KW - Assembly KW - Benchmarking UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692303326?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=List-Mode+Simulations+of+the+Subcriticai+Thor+Core+Benchmark+Sensitivity+Experiments&rft.au=Bahran%2C+R%3BHutchinson%2C+J%3BRichard%2C+B%3BSood%2C+Avneet&rft.aulast=Bahran&rft.aufirst=R&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=805&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-12-07 ER - TY - JOUR T1 - Management Perspective on Recent Accomplishments and Future Plans for NCERC AN - 1692302895; PQ0001263141 AB - In 1999, Secretary of Energy Bill Richardson made the decision to relocate the mission of the Los Alamos Critical Experiments Facility (LACEF) located at Technical Area 18, Los Alamos National Laboratory (LANL) to a new location. The initial time frame for shutting down LACEF, relocating the mission (which included moving on the order of one ton of special nuclear material, and designing and constructing a new Security Category I / Hazard Category 2 Nuclear Facility), and then successfully re-starting was estimated to be 2014. With the events of September 11, 2001, the security posture of all nuclear facilities within the United States (U.S.) increased dramatically and, as one would expect, there was a significant corresponding increase in the security costs associated with this change. The U.S. Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) then made the business decision to accelerate the relocation of the TA-18 mission to save money on anticipated security costs associated with operations in the out years.a JF - Transactions of the American Nuclear Society AU - Clement, Steven D AU - Myers, William L AU - McKamy, Jerry N AU - Ellis, Nichole AD - Los Alamos National Laboratory: P.O. Box 1663MS B224, Los Alamos, NM 87545 clement@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 795 EP - 798 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Costs KW - Security KW - Energy (nuclear) KW - Missions KW - Energy policy KW - Business KW - Categories KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692302895?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Management+Perspective+on+Recent+Accomplishments+and+Future+Plans+for+NCERC&rft.au=Clement%2C+Steven+D%3BMyers%2C+William+L%3BMcKamy%2C+Jerry+N%3BEllis%2C+Nichole&rft.aulast=Clement&rft.aufirst=Steven&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=795&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - Characterization of the NPOD3 Detectors in MCNPS and MCNP6 AN - 1692302864; PQ0001263158 AB - Researchers performed a series of measurements in May 2012 to characterize the NPOD3 (NPOD) detector systems. The detectors were placed in varying states of disassembly to determine the effect of individual components on detector response. A 4.5 kg alpha -phase Pu sphere known as the Los Alamos BeRP ball was used as the SNM source in both a bare configuration and reflected by varying thicknesses (0.5, 1, 1.5, and 3 inches) of polyethylene. A set of MCNPS and MCNP6 simulations matching the experimental setups were run and the data were compared to the measured data. JF - Transactions of the American Nuclear Society AU - Clark, Kimberly AU - Hutchinson, Jesson AU - Solomon, C J AU - Cutler, Theresa AU - Sood, Avneet AD - Los Alamos National Laboratory: PO Box 1663, Los Alamos, NM, 87545 kclark@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 861 EP - 864 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Plutonium KW - Detectors KW - Simulation KW - Disassembly KW - Dismantling KW - Polyethylenes KW - Matching UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692302864?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Characterization+of+the+NPOD3+Detectors+in+MCNPS+and+MCNP6&rft.au=Clark%2C+Kimberly%3BHutchinson%2C+Jesson%3BSolomon%2C+C+J%3BCutler%2C+Theresa%3BSood%2C+Avneet&rft.aulast=Clark&rft.aufirst=Kimberly&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=861&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - The Asymptotic Probability Distribution of Fission Numbers in a Multiplying System AN - 1692302816; PQ0001263251 AB - The subject of neutron number fluctuations in fissile material in the presence of a weak internal source (such as spontaneous fission) has been thoroughly investigated and a complete stochastic theory based on discrete state, continuous time Markov processes is now well-established [1, 2]. In a lumped-model description, where all phase space dependence is ignored, an approximate but accurate solution for the probability distribution function (pdf) for the neutron number as a function of time, in the absence of delayed neutrons, can be readily constructed using probability generating function techniques [1,3]. For prompt supercritical systems, this solution and variations on it, provide insight into the phenomena associated with diverging fission chains such as may be encountered in fast burst reactors as well as nuclear criticality accidents. Equally important in such applications, however, is the random distribution of fission numbers over the time interval of interest, as this quantity is directly related to the energy deposited in the system and hence determines the system response under these conditions. In this paper, we generalize Bell's lumped-model formulation to investigate the random distribution of the cumulative fission number and, in particular, obtain the interesting result for super-critical systems that at late times the fission number distribution becomes locked into the neutron number distribution. JF - Transactions of the American Nuclear Society AU - Fichtl, Erin D AU - Prinja, Anil K AD - Computational Physics and Methods, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, 87545, USA efichtl@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 1221 EP - 1224 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear fission KW - Nuclear power generation KW - Energy (nuclear) KW - Deposition KW - Nuclear reactor components KW - Intervals KW - Asymptotic properties KW - Fission UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692302816?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=The+Asymptotic+Probability+Distribution+of+Fission+Numbers+in+a+Multiplying+System&rft.au=Fichtl%2C+Erin+D%3BPrinja%2C+Anil+K&rft.aulast=Fichtl&rft.aufirst=Erin&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1221&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-12-07 ER - TY - JOUR T1 - Springs and the role of stratigraphy and structure on streamflow generation in El Rito Watershed AN - 1689592232; 2015-056917 AB - Recent research indicates that groundwater/surface water interactions are very complex in the El Rito watershed. In fact, this watershed appears to be a unique variation of the 3D watershed model [Frisbee et al., 2011] where interbasin groundwater flow (IGF) is thought to occur. The El Rito watershed can be broken into four distinct hydrogeological zones: 1) perennial streamflow in the headwaters maintained by springs and groundwater discharge, 2) losing conditions downstream of the headwaters, 3) a small, persistent 500 m gaining stretch in the mid-reach, and 4) losing conditions from the mid-reaches to the outlet. In this poster, we investigate the processes controlling spring generation in zone 1 and the gaining-to-losing transition in zone 2. The majority of perennial springs are located in the headwaters where east-dipping Tertiary conglomerates are underlain by west-dipping Mesozoic and older sedimentary layers. We hypothesize that the contact between the Tertiary and Mesozoic layers exerts primary control on the generation of springs in the headwaters and that this stratigraphy is responsible for the gaining/losing transitions in zone 2 as well. We tested this hypothesis by mapping geologic units near springs, aspect of spring emergence, age-dating of springs, and electrical resistivity surveys along spring emergences. Our data show that springs are more numerous in the northern extent of the headwaters and emerge on the western side of the stream valley primarily from the Tertiary conglomerates. In the southern extent of the headwaters, springs are less numerous and emerge from the eastern side of the stream valley where the Tertiary conglomerates have been completely removed and the stream has downcut into the west-dipping Mesozoic sedimentary layers. This is also the location where the stream transitions from gaining to losing. We infer that the Tertiary conglomerates are critical sources of groundwater for spring and streamflow generation in the headwaters. Groundwater in the Mesozoic sediments likely flows under El Rito creek and into the adjacent watershed to the west. Thus, groundwater/surface water interactions are strongest where the conglomerates are present. This research highlights the need to quantify the role of stratigraphy and structure on streamflow generation in large watersheds. JF - Abstracts with Programs - Geological Society of America AU - Tysor, Elizabeth H AU - Howard, Jordan AU - Stewart-Maddox, Noah AU - Swanson, Jake AU - Degon, Amber AU - Frisbee, Marty D AU - Wilson, John L AU - Newman, Brent AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 529 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689592232?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Springs+and+the+role+of+stratigraphy+and+structure+on+streamflow+generation+in+El+Rito+Watershed&rft.au=Tysor%2C+Elizabeth+H%3BHoward%2C+Jordan%3BStewart-Maddox%2C+Noah%3BSwanson%2C+Jake%3BDegon%2C+Amber%3BFrisbee%2C+Marty+D%3BWilson%2C+John+L%3BNewman%2C+Brent%3BAnonymous&rft.aulast=Tysor&rft.aufirst=Elizabeth&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=529&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-06-18 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Scale dependence of colloid-associated radionuclide transport AN - 1689591226; 2015-056699 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Reimus, Paul W AU - Boukhalfa, Hakim AU - Wasserman, Naomi AU - Erdmann, Bryan AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2052 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - water KW - United States KW - experimental studies KW - colloidal materials KW - volcanic rocks KW - isotopes KW - igneous rocks KW - alkali metals KW - models KW - pyroclastics KW - partitioning KW - radioactive isotopes KW - Cs-137 KW - cesium KW - transport KW - metals KW - filtration KW - tuff KW - Nevada KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591226?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Scale+dependence+of+colloid-associated+radionuclide+transport&rft.au=Reimus%2C+Paul+W%3BBoukhalfa%2C+Hakim%3BWasserman%2C+Naomi%3BErdmann%2C+Bryan%3BAnonymous&rft.aulast=Reimus&rft.aufirst=Paul&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2052&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Last updated - 2015-06-18 N1 - SubjectsTermNotLitGenreText - alkali metals; cesium; colloidal materials; Cs-137; experimental studies; filtration; igneous rocks; isotopes; metals; models; Nevada; partitioning; pyroclastics; radioactive isotopes; transport; tuff; United States; volcanic rocks; water ER - TY - JOUR T1 - Earlier onset of "4.2 Ka event" in the Eastern U.S. is possible at 4.5 Ka; middle Holocene mega-droughts identified using stable isotopes and micromorphology of speleothems and delta (super 13) C of floodplain SOM AN - 1680755779; 2015-044002 AB - A major shift in climate at 4.2 ka is apparent in proxy records from many areas of the world. Whereas some sites recorded enhanced moisture at this time, many areas of the world, including mid-continental North America (NA), experienced severe drought the 4.2 ka mega-drought (MD). Proposed formal subdivision of the Holocene makes this event the boundary between the Middle and Late Holocene, with the stratotype a speleothem record from India (modeled time interval for the event of 375 years centered on 4.1 ka). However, increasing evidence from eastern NA shows an earlier onset centered at 4.5 ka. High-resolution records from Buckeye Creek Cave (BCC), WV and Raccoon Mountain Cave (RMC), TN indicate centennial-scale drought and show well-defined positive excursions of delta (super 13) C and of delta (super 18) O (BCC is weak). Sr data for the RMC speleothem (obtained using micro-XRF) show high Sr associated with warm, dry intervals and also support interpretation of four Middle Holocene MD events. UV fluorescent (UVf) annual layers deposited during droughts are extremely thin. Coeval delta (super 13) C values of soil organic matter (SOM) in floodplain records, ranging from watershed- to tributary-scale, also record up to four MD. The factor that links the speleothem and floodplain/soil systems is water. The 4.5 ka event in the eastern US is likely a non-linear response to gradual decline in summer insolation and in seasonal delivery of moisture (largely influenced by the mean summer position of the Bermuda High), in agreement with previous researchers. From 8- 5.5 ka, summer ppt. > winter ppt., but from 5.5-3 ka winter ppt = summer ppt, and by the late Holocene, winter ppt. > summer ppt. This change is recorded at an annual scale by progressively poorer UVf annual layer records approaching the 4.5 ka event. The earlier timing of 4.5 ka in eastern NA contrasts markedly with the 4.2 ka documented in the mid-continental NA, and could indicate earlier effects of shifts in the Bermuda High in the eastern regions. JF - Abstracts with Programs - Geological Society of America AU - Li, Zheng-Hua AU - Driese, Steven G AU - Stinchcomb, Gary E AU - Kocis, James J AU - Horn, Sally P AU - Buckles, Jessica AU - Rowe, Harry AU - Cheng, Hai AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 699 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680755779?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Earlier+onset+of+%224.2+Ka+event%22+in+the+Eastern+U.S.+is+possible+at+4.5+Ka%3B+middle+Holocene+mega-droughts+identified+using+stable+isotopes+and+micromorphology+of+speleothems+and+delta+%28super+13%29+C+of+floodplain+SOM&rft.au=Li%2C+Zheng-Hua%3BDriese%2C+Steven+G%3BStinchcomb%2C+Gary+E%3BKocis%2C+James+J%3BHorn%2C+Sally+P%3BBuckles%2C+Jessica%3BRowe%2C+Harry%3BCheng%2C+Hai%3BAnonymous&rft.aulast=Li&rft.aufirst=Zheng-Hua&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=699&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2016-10-25 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Kinetic model for electrorefining, part I: Model development and validation AN - 1678016437; 19437170 AB - Electrorefining is the key process of the pryprocessing for treatment of spent nuclear fuels. In the present study, a kinetic model for electrorefining is developed. The model has the capability to predict the kinetic features of materials dissolution/deposition at anodes/cathodes of the electrorefiner and the evolution of the partial currents of the species involved, the potentials of the electrodes, and species concentrations in the molten salt. The model takes into account the changes of the surface areas and the volumes of the electrodes related to materials dissolution and deposition. The model is validated by compared with available experimental data. This article, focusing on the model development and validation, is Part I of the systemic study on development of the pyroprocessing model. Part II of this study will focus on the applications of the model. JF - Progress in Nuclear Energy AU - Zhang, Jinsuo AD - Nuclear Engineering Program, Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, USA; Los Alamos National Laboratory, USA zhang.3558@osu.edu. PY - 2014 SP - 279 EP - 286 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 70 SN - 0149-1970, 0149-1970 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Pyroprocessing KW - Spent nuclear fuel KW - Modeling KW - Electrorefining KW - Mathematical models KW - Fused salts KW - Electrodes KW - Dissolution KW - Deposition KW - Evolution KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1678016437?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Progress+in+Nuclear+Energy&rft.atitle=Kinetic+model+for+electrorefining%2C+part+I%3A+Model+development+and+validation&rft.au=Zhang%2C+Jinsuo&rft.aulast=Zhang&rft.aufirst=Jinsuo&rft.date=2014-01-01&rft.volume=70&rft.issue=&rft.spage=279&rft.isbn=&rft.btitle=&rft.title=Progress+in+Nuclear+Energy&rft.issn=01491970&rft_id=info:doi/10.1016%2Fj.pnucene.2013.03.001 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2016-02-03 DO - http://dx.doi.org/10.1016/j.pnucene.2013.03.001 ER - TY - JOUR T1 - Kinetic model for electrorefining, part II: Model applications and case studies AN - 1678012009; 19437171 AB - The model developed in Part I of the systematic study is applied to identify the kinetic features of materials flow in an electrorefinner. The most recent thermodynamic and electrochemical data reported are used in the present simulations. Both liquid and solid electrodes are considered. The main differences of the kinetics of materials dissolution/deposition between the liquid and solid electrode and the reasons for these differences are identified. The important factors that affect the evolution of electrorefining with operation are identified. JF - Progress in Nuclear Energy AU - Zhang, Jinsuo AD - The Ohio State University, Department of Mechanical and Aerospace Engineering, Nuclear Engineering Program, United States; Los Alamos National Laboratory, United States zhang.3558@osu.edu PY - 2014 SP - 287 EP - 297 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 70 SN - 0149-1970, 0149-1970 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Fuel cycle KW - Pyrochemical processing KW - Modeling KW - Electrorefining KW - Computer simulation KW - Solid electrodes KW - Deposition KW - Nuclear reactor components KW - Liquids KW - Evolution KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1678012009?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Progress+in+Nuclear+Energy&rft.atitle=Kinetic+model+for+electrorefining%2C+part+II%3A+Model+applications+and+case+studies&rft.au=Zhang%2C+Jinsuo&rft.aulast=Zhang&rft.aufirst=Jinsuo&rft.date=2014-01-01&rft.volume=70&rft.issue=&rft.spage=287&rft.isbn=&rft.btitle=&rft.title=Progress+in+Nuclear+Energy&rft.issn=01491970&rft_id=info:doi/10.1016%2Fj.pnucene.2013.03.008 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2016-02-03 DO - http://dx.doi.org/10.1016/j.pnucene.2013.03.008 ER - TY - JOUR T1 - From Lab to Floor: Advanced Robotics for Flexible Component Assembly AN - 1673394704; PQ0001262953 AB - For decades, robotics and automation have promised to relieve humans from work that is dull, dirty and/or dangerous. In the nuclear world, much of our daily work fits this description. Yet in large part, the promise of robotics remains unfulfilled despite the obvious benefits of reduced radiation dose to workers, better process control, and improved ergonomics. Robotic systems deployed in nuclear facilities often are teleoperated remote handling systems that require highly skilled operators. These systems are effective at protecting workers from radiation and contamination, but it is becoming increasingly difficult to maintain a skilled labor pool as the scope of the nuclear complex contracts. JF - Transactions of the American Nuclear Society AU - O'Neil, Brian E AD - Manufacturing Science and Engineering (MET-2), Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, oneil@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 68 EP - 70 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Health & Safety Science Abstracts KW - Radiation KW - Contracts KW - Automation KW - Ergonomics KW - Working conditions KW - H 1000:Occupational Safety and Health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673394704?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=From+Lab+to+Floor%3A+Advanced+Robotics+for+Flexible+Component+Assembly&rft.au=O%27Neil%2C+Brian+E&rft.aulast=O%27Neil&rft.aufirst=Brian&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=68&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-04-01 N1 - Last updated - 2015-04-29 N1 - SubjectsTermNotLitGenreText - Contracts; Radiation; Automation; Working conditions; Ergonomics ER - TY - JOUR T1 - MCNP6 Cosmic & Terrestrial Background Particle Fluxes - Release 4 AN - 1671604880; 20432476 AB - The galactic cosmic-ray (GCR) source option[1] was implemented in the all-energy, all-particle transport code MCNP6 super(2) in 2010. This source option along with other newly added features to MCNP6 have been used to produce increasingly accurate global cosmic and terrestrial background flux data files (background.dat).[3] This data file is read and sampled by MCNP6 whenever a user invokes the background source option. The most recent release of this file, Version 3, was produced in 2013. This paper will report on current progress toward enhancements that have been made to the modeling and simulation of these background spectra, which will be implemented in Release 4 of the background.dat file. JF - Transactions of the American Nuclear Society AU - McMath, G E AU - McKinney, G W AU - Wilcox, T A AD - Los Alamos National Laboratory, P.O. Box 1663 MS C921, Los Alamos, NM, 87545 Y1 - 2014 PY - 2014 DA - 2014 SP - 461 EP - 464 PB - American Nuclear Society, Inc. VL - 110 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Computer simulation KW - Transport KW - Spectra KW - Fluxes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671604880?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=MCNP6+Cosmic+%26amp%3B+Terrestrial+Background+Particle+Fluxes+-+Release+4&rft.au=McMath%2C+G+E%3BMcKinney%2C+G+W%3BWilcox%2C+T+A&rft.aulast=McMath&rft.aufirst=G&rft.date=2014-01-01&rft.volume=110&rft.issue=&rft.spage=461&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Facile, High Quality Sequencing of Bacterial Genomes from Small Amounts of DNA AN - 1668270550; PQ0001265840 AB - Sequencing bacterial genomes has traditionally required large amounts of genomic DNA (~1 mu g). There have been few studies to determine the effects of the input DNA amount or library preparation method on the quality of sequencing data. Several new commercially available library preparation methods enable shotgun sequencing from as little as 1 ng of input DNA. In this study, we evaluated the NEBNext Ultra library preparation reagents for sequencing bacterial genomes. We have evaluated the utility of NEBNext Ultra for resequencing and de novo assembly of four bacterial genomes and compared its performance with the TruSeq library preparation kit. The NEBNext Ultra reagents enable high quality resequencing and de novo assembly of a variety of bacterial genomes when using 100 ng of input genomic DNA. For the two most challenging genomes (Burkholderia spp.), which have the highest GC content and are the longest, we also show that the quality of both resequencing and de novo assembly is not decreased when only 10 ng of input genomic DNA is used. JF - International Journal of Genomics AU - Vuyisich, Momchilo AU - Arefin, Ayesha AU - Davenport, Karen AU - Feng, Shihai AU - Gleasner, Cheryl AU - McMurry, Kim AU - Parson-Quintana, Beverly AU - Price, Jennifer AU - Scholz, Matthew AU - Chain, Patrick AD - Los Alamos National Laboratory, P.O. Box 1663, MS M888, Los Alamos, NM 87545, USA, vuyisich@lanl.gov Y1 - 2014/01// PY - 2014 DA - Jan 2014 PB - Hindawi Publishing Corporation, P.O. Box 3079 Cuyahoga Falls OH 44223 United States VL - 2014 SN - 2314-436X, 2314-436X KW - Genetics Abstracts; Microbiology Abstracts B: Bacteriology; Biochemistry Abstracts 2: Nucleic Acids KW - Bacteria KW - Guanylate cyclase KW - DNA sequencing KW - Data processing KW - DNA KW - genomics KW - Burkholderia KW - J 02310:Genetics & Taxonomy KW - N 14810:Methods KW - G 07770:Bacteria UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668270550?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Genomics&rft.atitle=Facile%2C+High+Quality+Sequencing+of+Bacterial+Genomes+from+Small+Amounts+of+DNA&rft.au=Vuyisich%2C+Momchilo%3BArefin%2C+Ayesha%3BDavenport%2C+Karen%3BFeng%2C+Shihai%3BGleasner%2C+Cheryl%3BMcMurry%2C+Kim%3BParson-Quintana%2C+Beverly%3BPrice%2C+Jennifer%3BScholz%2C+Matthew%3BChain%2C+Patrick&rft.aulast=Vuyisich&rft.aufirst=Momchilo&rft.date=2014-01-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Genomics&rft.issn=2314436X&rft_id=info:doi/10.1155%2F2014%2F434575 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Guanylate cyclase; DNA sequencing; Data processing; DNA; genomics; Bacteria; Burkholderia DO - http://dx.doi.org/10.1155/2014/434575 ER - TY - JOUR T1 - The environmental costs and benefits of fracking AN - 1668229395; 2015-029514 AB - Unconventional oil and natural gas extraction enabled by horizontal drilling and hydraulic fracturing (fracking) is driving an economic boom, with consequences described from "revolutionary" to "disastrous." Reality lies somewhere in between. Unconventional energy generates income and, done well, can reduce air pollution and even water use compared with other fossil fuels. Alternatively, it could slow the adoption of renewables and, done poorly, release toxic chemicals into water and air. Primary threats to water resources include surface spills, wastewater disposal, and drinking-water contamination through poor well integrity. An increase in volatile organic compounds and air toxics locally are potential health threats, but the switch from coal to natural gas for electricity generation will reduce sulfur, nitrogen, mercury, and particulate air pollution. Data gaps are particularly evident for human health studies, for the question of whether natural gas will displace coal compared with renewables, and for decadal-scale legacy issues of well leakage and plugging and abandonment practices. Critical topics for future research include data for (a) estimated ultimate recovery (EUR) of unconventional hydrocarbons, (b) the potential for further reductions of water requirements and chemical toxicity, (c) whether unconventional resource development alters the frequency of well integrity failures, (d) potential contamination of surface and ground waters from drilling and spills, (e) factors that could cause wastewater injection to generate large earthquakes, and (f) the consequences of greenhouse gases and air pollution on ecosystems and human health. JF - Annual Review of Environment and Resources AU - Jackson, Robert B AU - Vengosh, Avner AU - Carey, J William AU - Davies, Richard J AU - Darrah, Thomas H AU - O'Sullivan, Francis AU - Petron, Gabrielle Y1 - 2014 PY - 2014 DA - 2014 SP - 327 EP - 362 PB - Annual Reviews, Palo Alto, CA VL - 39 SN - 1543-5938, 1543-5938 KW - hydraulic fracturing KW - water quality KW - horizontal drilling KW - petroleum engineering KW - waste water KW - pollution KW - cost KW - environmental effects KW - air pollution KW - environmental management KW - volatiles KW - organic compounds KW - mitigation KW - toxicity KW - oil spills KW - volatile organic compounds KW - directional drilling KW - drilling KW - induced earthquakes KW - earthquakes KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229395?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Review+of+Environment+and+Resources&rft.atitle=The+environmental+costs+and+benefits+of+fracking&rft.au=Jackson%2C+Robert+B%3BVengosh%2C+Avner%3BCarey%2C+J+William%3BDavies%2C+Richard+J%3BDarrah%2C+Thomas+H%3BO%27Sullivan%2C+Francis%3BPetron%2C+Gabrielle&rft.aulast=Jackson&rft.aufirst=Robert&rft.date=2014-01-01&rft.volume=39&rft.issue=&rft.spage=327&rft.isbn=&rft.btitle=&rft.title=Annual+Review+of+Environment+and+Resources&rft.issn=15435938&rft_id=info:doi/10.1146%2Fannurev-environ-031113-144051 L2 - http://arjournals.annualreviews.org/loi/energy LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 166 N1 - PubXState - CA N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-04-02 N1 - CODEN - ARENDD N1 - SubjectsTermNotLitGenreText - air pollution; cost; directional drilling; drilling; earthquakes; environmental effects; environmental management; horizontal drilling; hydraulic fracturing; induced earthquakes; mitigation; oil spills; organic compounds; petroleum engineering; pollution; toxicity; volatile organic compounds; volatiles; waste water; water quality DO - http://dx.doi.org/10.1146/annurev-environ-031113-144051 ER - TY - JOUR T1 - Natural hydraulic fracturing of the New Albany Shale (Devonian-Mississippian) in the Illinois Basin during Pleistocene glaciations AN - 1664436980; 2015-026300 AB - Within the Illinois Basin, freshwater extends down dip into the basin within the New Albany Shale (Devonian-Mississippian). The freshwater limit within the shale corresponds more or less to the southern limit of the pre-Wisconsin glaciation. In 2012, Schlegel used (super 4) He analysis of pore fluids from New Albany to suggest that the freshwater was emplaced during the Pleistocene between about 0.5 to 1.5 Ma. We hypothesize that permeability in the New Albany Shale was enhanced by "natural hydraulic fracturing" caused by increased fluid pressures associated with glacial loading. Numerous open and calcite filled fractures within the New Albany Shales having aperture widths varying between 0.05 to 1 mm have been documented (Salehi et al. 2009). The influx of these melt waters into the New Albany Shale likely transported near-surface microorganisms to depths of 1-2 km, and led to the formation of economically significant quantities of microbial methane. Here we present results from a cross-sectional hydrodynamic-geomechanical model that includes a Mohr-Columb failure criteria for critically stressed faults. Permeability was increased by 1000 fold for all formations within the failure envelope. The region of enhanced permeability beneath the ice sheet facilitated the rapid transport of relatively fresh glacial meltwater to the south. Our model also produced salinity overturns with fresher water underlying more saline pore fluids; a phenomenon which has been observed across the Illinois Basin. JF - Abstracts with Programs - Geological Society of America AU - Person, Mark AU - McIntosh, Jennifer C AU - Schlegel, Melissa AU - Rupp, John A AU - Ellett, Kevin AU - Gable, Carl W AU - Bowen, Brenda B AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 264 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664436980?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Natural+hydraulic+fracturing+of+the+New+Albany+Shale+%28Devonian-Mississippian%29+in+the+Illinois+Basin+during+Pleistocene+glaciations&rft.au=Person%2C+Mark%3BMcIntosh%2C+Jennifer+C%3BSchlegel%2C+Melissa%3BRupp%2C+John+A%3BEllett%2C+Kevin%3BGable%2C+Carl+W%3BBowen%2C+Brenda+B%3BAnonymous&rft.aulast=Person&rft.aufirst=Mark&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=264&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-03-19 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Variations in soil carbon dioxide efflux across a thaw slump chronosequence in northwestern Alaska AN - 1660632397; 2015-018603 AB - Warming of the arctic landscape results in permafrost thaw, which causes ground subsidence or thermokarst. Thermokarst formation on hillslopes leads to the formation of thermal erosion features that dramatically alter soil properties and likely affect soil carbon emissions, but such features have received little study in this regard. In order to assess the magnitude and persistence of altered emissions, we use a space-for-time substitution (thaw slump chronosequence) to quantify and compare peak growing season soil carbon dioxide (CO (sub 2) ) fluxes from undisturbed tundra, active, and stabilized thermal erosion features over two seasons. Measurements of soil temperature and moisture, soil organic matter, and bulk density are used to evaluate the factors controlling soil CO (sub 2) emissions from each of the three chronosequence stages. Soil CO (sub 2) efflux from the active slump is consistently less than half that observed in the undisturbed tundra or stabilized slump (1.8 versus 5.2 g CO (sub 2) -C m (super -2) d (super -1) in 2011; 0.9 versus 3.2 g CO (sub 2) -C m (super -2) d (super -1) in 2012), despite soil temperatures on the floor of the active slump that are 10-15 degrees C warmer than the tundra and stabilized slump. Environmental factors such as soil temperature and moisture do not exert a strong control on CO (sub 2) efflux, rather, local soil physical and chemical properties such as soil organic matter and bulk density, are strongly and inversely related among these chronosequence stages (r (super 2) =0.97), and explain approximately 50% of the variation in soil CO (sub 2) efflux. Thus, despite profound soil warming and rapid exposure of buried carbon in the active slump, the low organic matter content, lack of stable vegetation, and large increases in the bulk densities in the uppermost portion of active slump soils (up to approximately 2.2 g (super -1) cm (super -3) ) appear to limit CO (sub 2) efflux from the active slump. Future studies should assess seasonal fluxes across these features and determine whether soil CO (sub 2) fluxes from active features with high organic content are similarly low. Copyright 2014 IOP Publishing Ltd JF - Environmental Research Letters AU - Jensen, A E AU - Lohse, K A AU - Crosby, B T AU - Mora, C I Y1 - 2014/01// PY - 2014 DA - January 2014 EP - Paper no. 025001 PB - IOP Publishing for Institute of Physics, Bristol VL - 9 IS - 2 KW - United States KW - erosion KW - tundra KW - moisture KW - Selawik River KW - ecosystems KW - climate change KW - temperature KW - carbon dioxide KW - northwestern Alaska KW - melting KW - carbon KW - arctic environment KW - mass movements KW - climate effects KW - chronosequences KW - soils KW - bulk density KW - thawing KW - slumping KW - physical properties KW - organic compounds KW - thermokarst KW - Alaska KW - soil gases KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660632397?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Research+Letters&rft.atitle=Variations+in+soil+carbon+dioxide+efflux+across+a+thaw+slump+chronosequence+in+northwestern+Alaska&rft.au=Jensen%2C+A+E%3BLohse%2C+K+A%3BCrosby%2C+B+T%3BMora%2C+C+I&rft.aulast=Jensen&rft.aufirst=A&rft.date=2014-01-01&rft.volume=9&rft.issue=2&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=1748-9326&rft_id=info:doi/10.1088%2F1748-9326%2F9%2F2%2F025001 L2 - http://iopscience.iop.org/1748-9326 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 48 N1 - Document feature - illus. incl. 2 tables, sketch map N1 - Last updated - 2015-03-05 N1 - SubjectsTermNotLitGenreText - Alaska; arctic environment; bulk density; carbon; carbon dioxide; chronosequences; climate change; climate effects; ecosystems; erosion; mass movements; melting; moisture; northwestern Alaska; organic compounds; physical properties; Selawik River; slumping; soil gases; soils; temperature; thawing; thermokarst; tundra; United States DO - http://dx.doi.org/10.1088/1748-9326/9/2/025001 ER - TY - JOUR T1 - Microanalysis of trinitite AN - 1660629695; 2015-021400 AB - Recent advances in microanalysis allow re-evaluation of nuclear fallout debris at unprecedented scales. Fine-scale (tens of microns) elemental and isotopic heterogeneities contradict the traditional concept that debris is largely homogeneous and provide additional constraints on the incorporation (location, timing) of radionuclides in glassy debris. We have analyzed aerodynamic fallout glass from Trinity by autoradiography, SEM, EPMA, and SIMS. Trinitite is composed of three glassy phases and in some samples, whole minerals that have experienced minimal, if any, melting. The glass phases comprise an alkali-rich silicate glass, a Ca-Mg-Fe-bearing silicate glass, and SiO (sub 2) (unmelted to partially melted quartz). Uranium is present only in the Ca-Mg-Fe glass. We measured the U isotope composition of the Ca-Mg-Fe glass using a Cameca IMS 1280 SIMS. Most (super 235) U/ (super 238) U measurements are natural ( approximately 0.0072), reflecting incorporation of the natural U metal tamper and fused earth. Depleted (super 235) U/ (super 238) U is less common and reflects fission of the natural U. Enriched (super 235) U/ (super 238) U was also measured, and the origin of this signature is under investigation. We calculate U abundance (7-55 mu g/g) using a sensitivity factor based on NIST 611 and a glass doped with NBL CRM-U500. The 239.05 amu peak is deconvolved into (super 238) UH and (super 239) Pu, and (super 239) Pu abundances (<5-160 ng/g) are estimated assuming an RSF (sub U:Pu) of 2.5. Regions of higher U and/or Pu do not directly correlate with more radioactive regions identified by autoradiography, suggesting that other species (e.g. fission products) contribute to the observed radioactivity. Decay correction of (super 235) U/ (super 238) U using estimated (super 239) Pu contents is negligible. We will show that microanalytical interrogation of debris reveals a greater range of elemental and isotopic heterogeneities and textural information than bulk analysis. These data facilitate targeting of specific device-bearing phases for compositional analysis and constrain the relative timing of incorporation of radioactive species into debris. JF - Abstracts with Programs - Geological Society of America AU - Zimmer, Mindy M AU - Bonamici, Chloe E AU - Kinman, William S AU - Pollington, Anthony D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 103 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 02D:Isotope geochemistry KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660629695?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Microanalysis+of+trinitite&rft.au=Zimmer%2C+Mindy+M%3BBonamici%2C+Chloe+E%3BKinman%2C+William+S%3BPollington%2C+Anthony+D%3BAnonymous&rft.aulast=Zimmer&rft.aufirst=Mindy&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=103&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-03-05 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Early explorations; Part 1, First observations AN - 1656039945; 2015-015921 JF - Special Publication - New Mexico Geological Society AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 11 EP - 24 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - history KW - Emory, William H. KW - Simpson, James H. KW - Marcy, Randolph B. KW - Wislizenus, Adolph KW - New Mexico KW - biography KW - areal geology KW - Abert, James W. KW - observations KW - 13:Areal geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039945?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=Early+explorations%3B+Part+1%2C+First+observations&rft.au=Anonymous&rft.aulast=Anonymous&rft.aufirst=&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=11&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - NM N1 - Document feature - illus. incl. portrs. N1 - Last updated - 2015-02-19 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - Abert, James W.; areal geology; biography; Emory, William H.; history; Marcy, Randolph B.; New Mexico; observations; Simpson, James H.; United States; Wislizenus, Adolph ER - TY - JOUR T1 - Women in geology in New Mexico AN - 1656039937; 2015-015919 JF - Special Publication - New Mexico Geological Society AU - McLemore, Virginia T AU - Dunbar, Nelia AU - Love, Jane C AU - Lewis, Claudia J Y1 - 2014 PY - 2014 DA - 2014 SP - 4 EP - 8 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - history KW - geology KW - New Mexico KW - women KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=Women+in+geology+in+New+Mexico&rft.au=McLemore%2C+Virginia+T%3BDunbar%2C+Nelia%3BLove%2C+Jane+C%3BLewis%2C+Claudia+J&rft.aulast=McLemore&rft.aufirst=Virginia&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=4&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 42 N1 - PubXState - NM N1 - Document feature - portrs. N1 - Last updated - 2015-02-19 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - geology; history; New Mexico; United States; women ER - TY - JOUR T1 - Between the wars (1920-1940) AN - 1656039927; 2015-015925 JF - Special Publication - New Mexico Geological Society AU - Kues, Barry S AU - Lewis, Claudia J AU - Fassett, James E AU - Williamson, Thomas E AU - Phillips, Fred M Y1 - 2014 PY - 2014 DA - 2014 SP - 121 EP - 148 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - Lasky, Samuel Grossman KW - Bryan, Kirk KW - Reeside, John Bernard KW - New Mexico KW - biography KW - Theis, Charles V. KW - history KW - Simpson, George Gaylord KW - Sears, Julian Ducker KW - Dane, Carle Hamilton KW - Northrop, Stuart Alvord KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039927?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=Between+the+wars+%281920-1940%29&rft.au=Kues%2C+Barry+S%3BLewis%2C+Claudia+J%3BFassett%2C+James+E%3BWilliamson%2C+Thomas+E%3BPhillips%2C+Fred+M&rft.aulast=Kues&rft.aufirst=Barry&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=121&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - NM N1 - Document feature - illus. incl. sects., portrs. N1 - Last updated - 2015-02-19 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - biography; Bryan, Kirk; Dane, Carle Hamilton; history; Lasky, Samuel Grossman; New Mexico; Northrop, Stuart Alvord; Reeside, John Bernard; Sears, Julian Ducker; Simpson, George Gaylord; Theis, Charles V.; United States ER - TY - JOUR T1 - Claudia Johnson Lewis; 1956-2012 AN - 1656039905; 2015-015920 JF - Special Publication - New Mexico Geological Society AU - Kelley, Shari AU - Schultz-Fellenz, Emily Y1 - 2014 PY - 2014 DA - 2014 SP - 9 EP - 10 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - geology KW - New Mexico KW - biography KW - Lewis, Claudia Johnson KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039905?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=Claudia+Johnson+Lewis%3B+1956-2012&rft.au=Kelley%2C+Shari%3BSchultz-Fellenz%2C+Emily&rft.aulast=Kelley&rft.aufirst=Shari&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=9&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 6 N1 - PubXState - NM N1 - Document feature - portr., sketch map N1 - Last updated - 2015-02-19 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - biography; geology; Lewis, Claudia Johnson; New Mexico; United States ER - TY - JOUR T1 - The era of the great western geological surveys and the beginning of the U.S. Geological Survey (1865-1890) AN - 1656039886; 2015-015923 JF - Special Publication - New Mexico Geological Society AU - Kues, Barry S AU - Lewis, Claudia J AU - Zeigler, Kate E AU - Martz, Jeffrey Y1 - 2014 PY - 2014 DA - 2014 SP - 45 EP - 74 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - survey organizations KW - Hayden, Ferdinand KW - U. S. Geological Survey KW - government agencies KW - Gilbert, Grove Karl KW - Howell, Edwin E. KW - LeConte, John L. KW - New Mexico KW - biography KW - areal geology KW - history KW - Loew, Oscar KW - Cope, Edward Drinker KW - Stevenson, John James KW - Dutton, Clarence Edward KW - surveys KW - 13:Areal geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039886?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=The+era+of+the+great+western+geological+surveys+and+the+beginning+of+the+U.S.+Geological+Survey+%281865-1890%29&rft.au=Kues%2C+Barry+S%3BLewis%2C+Claudia+J%3BZeigler%2C+Kate+E%3BMartz%2C+Jeffrey&rft.aulast=Kues&rft.aufirst=Barry&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=45&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - NM N1 - Document feature - illus. incl. chart, sect., portrs. N1 - Last updated - 2015-02-19 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - areal geology; biography; Cope, Edward Drinker; Dutton, Clarence Edward; Gilbert, Grove Karl; government agencies; Hayden, Ferdinand; history; Howell, Edwin E.; LeConte, John L.; Loew, Oscar; New Mexico; Stevenson, John James; survey organizations; surveys; U. S. Geological Survey; United States ER - TY - JOUR T1 - An explosion of information (1940-1969) AN - 1656039787; 2015-015926 JF - Special Publication - New Mexico Geological Society AU - Kues, Barry S AU - Lewis, Claudia J AU - McLemore, Virginia T AU - Schoderbek, David AU - Love, Jane C AU - Bauer, Paul W AU - Ewing, Rodney C AU - Dowse, Mary AU - Ash, Sid AU - Shumer, Lucy Harding AU - Morgan, Gary AU - Hawley, John W Y1 - 2014 PY - 2014 DA - 2014 SP - 149 EP - 192 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - Read, Charles Brian KW - Jahns, Richard Henry KW - Muehlberger, William Rudolf KW - Lochman-Balk, Christina KW - New Mexico KW - Flower, Rousseau Hayner KW - Kottlowski, Frank E. KW - biography KW - areal geology KW - history KW - Kelley, Vincent Cooper KW - Montgomery, Arthur KW - Weeks, Alice Mary Dowse KW - Gile, Leland H., Jr. KW - Doell, Richard Rayman KW - Smith Clay Taylor KW - Galusha, Theodore KW - Baldwin, Brewster KW - 13:Areal geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039787?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=An+explosion+of+information+%281940-1969%29&rft.au=Kues%2C+Barry+S%3BLewis%2C+Claudia+J%3BMcLemore%2C+Virginia+T%3BSchoderbek%2C+David%3BLove%2C+Jane+C%3BBauer%2C+Paul+W%3BEwing%2C+Rodney+C%3BDowse%2C+Mary%3BAsh%2C+Sid%3BShumer%2C+Lucy+Harding%3BMorgan%2C+Gary%3BHawley%2C+John+W&rft.aulast=Kues&rft.aufirst=Barry&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=149&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - NM N1 - Document feature - illus. incl. chart, sect., strat. col., portrs., sketch maps N1 - Last updated - 2015-04-16 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - areal geology; Baldwin, Brewster; Lochman-Balk, Christina; biography; Doell, Richard Rayman; Flower, Rousseau Hayner; Galusha, Theodore; Gile, Leland H., Jr.; history; Jahns, Richard Henry; Kelley, Vincent Cooper; Kottlowski, Frank E.; Montgomery, Arthur; Muehlberger, William Rudolf; New Mexico; Read, Charles Brian; Smith Clay Taylor; United States; Weeks, Alice Mary Dowse ER - TY - JOUR T1 - Early explorations; Part 2, Geologists enter New Mexico (1853-1860) AN - 1656039506; 2015-015922 JF - Special Publication - New Mexico Geological Society AU - Kues, Barry S Y1 - 2014 PY - 2014 DA - 2014 SP - 25 EP - 44 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - history KW - Newberry, John Strong KW - Shumard, George KW - New Mexico KW - Marcou, Jules KW - areal geology KW - Antisell, Thomas KW - 13:Areal geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039506?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=Early+explorations%3B+Part+2%2C+Geologists+enter+New+Mexico+%281853-1860%29&rft.au=Kues%2C+Barry+S&rft.aulast=Kues&rft.aufirst=Barry&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=25&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - NM N1 - Document feature - illus. incl. sects., portrs. N1 - Last updated - 2015-04-16 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - Antisell, Thomas; areal geology; history; Marcou, Jules; New Mexico; Newberry, John Strong; Shumard, George; United States ER - TY - JOUR T1 - The modern era, 1970 to present AN - 1656039406; 2015-015927 JF - Special Publication - New Mexico Geological Society AU - Fassett, James E AU - Morgan, Gary Y1 - 2014 PY - 2014 DA - 2014 SP - 193 EP - 207 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - history KW - Molenaar, Cornelius M. KW - Tedford, Richard Hall KW - New Mexico KW - biography KW - areal geology KW - Pillmore, Charles L. KW - 13:Areal geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039406?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=The+modern+era%2C+1970+to+present&rft.au=Fassett%2C+James+E%3BMorgan%2C+Gary&rft.aulast=Fassett&rft.aufirst=James&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=193&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - NM N1 - Document feature - portrs., sects., sketch maps N1 - Last updated - 2015-02-19 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - areal geology; biography; history; Molenaar, Cornelius M.; New Mexico; Pillmore, Charles L.; Tedford, Richard Hall; United States ER - TY - JOUR T1 - A brief history of geological studies in New Mexico; with biographical profiles of notable New Mexico geologists AN - 1656039332; 2015-015918 JF - Special Publication - New Mexico Geological Society Y1 - 2014 PY - 2014 DA - 2014 SP - 230 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - history KW - geologists KW - New Mexico KW - biography KW - areal geology KW - 13:Areal geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039332?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=A+brief+history+of+geological+studies+in+New+Mexico%3B+with+biographical+profiles+of+notable+New+Mexico+geologists&rft.au=&rft.aulast=&rft.aufirst=&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 1060 N1 - PubXState - NM N1 - Document feature - illus. incl. portrs., sketch maps N1 - SuppNotes - Individual chapters are cited separately N1 - Last updated - 2015-02-19 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - areal geology; biography; geologists; history; New Mexico; United States ER - TY - JOUR T1 - Great advances (1890-1920) AN - 1656039308; 2015-015924 JF - Special Publication - New Mexico Geological Society AU - Kues, Barry S AU - McLemore, Virginia T AU - Lewis, Claudia J AU - Williamson, Thomas E AU - Hawley, John W Y1 - 2014 PY - 2014 DA - 2014 SP - 75 EP - 120 PB - New Mexico Geological Society, Socorro, NM VL - 12 SN - 0548-6327, 0548-6327 KW - United States KW - Herrick, Clarence Luther KW - Matthew, William Diller KW - Johnson, Douglas Wilson KW - New Mexico KW - Girty, George Herbert KW - biography KW - areal geology KW - Jones, Fayette Alexander KW - history KW - Darton, Nelson Horatio KW - Lindgren, Waldemar KW - Lee, Willis Thomas KW - Keyes, Charles Rollin KW - Meinzer, Oscar Edward KW - Gregory, Herbert Ernest KW - 13:Areal geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+New+Mexico+Geological+Society&rft.atitle=Great+advances+%281890-1920%29&rft.au=Kues%2C+Barry+S%3BMcLemore%2C+Virginia+T%3BLewis%2C+Claudia+J%3BWilliamson%2C+Thomas+E%3BHawley%2C+John+W&rft.aulast=Kues&rft.aufirst=Barry&rft.date=2014-01-01&rft.volume=12&rft.issue=&rft.spage=75&rft.isbn=9781585460113&rft.btitle=&rft.title=Special+Publication+-+New+Mexico+Geological+Society&rft.issn=05486327&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - NM N1 - Document feature - illus. incl. chart, sects., portrs., sketch map N1 - Last updated - 2015-02-19 N1 - CODEN - NMGPAW N1 - SubjectsTermNotLitGenreText - areal geology; biography; Darton, Nelson Horatio; Girty, George Herbert; Gregory, Herbert Ernest; Herrick, Clarence Luther; history; Johnson, Douglas Wilson; Jones, Fayette Alexander; Keyes, Charles Rollin; Lee, Willis Thomas; Lindgren, Waldemar; Matthew, William Diller; Meinzer, Oscar Edward; New Mexico; United States ER - TY - JOUR T1 - Branching ratios in VUV induced dissociation of CO and N (sub 2) ; implications for isotopic compositions of the Sun AN - 1656038442; 2015-017044 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Shi, X Y AU - Yin, Q Z AU - Gao, H AU - Chang, Y C AU - Jackson, W M AU - Wiens, R C AU - Ng, C Y AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2285 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - dissociation KW - oxygen KW - isotopes KW - N-15 KW - stable isotopes KW - nitrogen KW - solar nebula KW - partitioning KW - carbon monoxide KW - Sun KW - O-18 KW - geochemical anomalies KW - O-17 KW - valency KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656038442?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Branching+ratios+in+VUV+induced+dissociation+of+CO+and+N+%28sub+2%29+%3B+implications+for+isotopic+compositions+of+the+Sun&rft.au=Shi%2C+X+Y%3BYin%2C+Q+Z%3BGao%2C+H%3BChang%2C+Y+C%3BJackson%2C+W+M%3BWiens%2C+R+C%3BNg%2C+C+Y%3BAnonymous&rft.aulast=Shi&rft.aufirst=X&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2285&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - carbon monoxide; dissociation; geochemical anomalies; isotopes; N-15; nitrogen; O-17; O-18; oxygen; partitioning; solar nebula; stable isotopes; Sun; valency ER - TY - JOUR T1 - Assessment of uranium in post-in situ-leach mining of mineralized arkosic sandstone units AN - 1656034405; 2015-015319 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Woldegabriel, G AU - Boukhalfa, H AU - Reimus, P AU - Heikoop, J AU - Ware, D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2727 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - mineral deposits, genesis KW - alteration KW - volcanic rocks KW - igneous rocks KW - sandstone KW - cores KW - Cenozoic KW - sedimentary rocks KW - mineral composition KW - volcanic ash KW - Powder River basin KW - in situ KW - oxidation KW - samples KW - Wyoming KW - pyroclastics KW - uranium ores KW - Tertiary KW - upper Tertiary KW - sandstone-type deposits KW - metal ores KW - leaching KW - clastic rocks KW - 27A:Economic geology, geology of ore deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656034405?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Assessment+of+uranium+in+post-in+situ-leach+mining+of+mineralized+arkosic+sandstone+units&rft.au=Woldegabriel%2C+G%3BBoukhalfa%2C+H%3BReimus%2C+P%3BHeikoop%2C+J%3BWare%2C+D%3BAnonymous&rft.aulast=Woldegabriel&rft.aufirst=G&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2727&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 3 N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - alteration; Cenozoic; clastic rocks; cores; igneous rocks; in situ; leaching; metal ores; mineral composition; mineral deposits, genesis; oxidation; Powder River basin; pyroclastics; samples; sandstone; sandstone-type deposits; sedimentary rocks; Tertiary; United States; upper Tertiary; uranium ores; volcanic ash; volcanic rocks; Wyoming ER - TY - JOUR T1 - Time-transient mineral nucleation and growth controlled by 4D thermal fields during regional-contact metamorphism AN - 1645573571; 2015-007186 AB - Thermal fields around intrusions in the middle crust that are responsible for regional-contact metamorphism are complex functions of space and time. Such systems can produce fundamentally different P-T-t paths in rocks that experience the same peak metamorphic conditions. Heat and mass transport calculations for multiple plutons intruded into host rocks with spatially variable, anisotropic permeability provide insights into the time-dependent thermal evolution of the metamorphic rocks throughout the 3-D domain. The results of transient 3-D thermal models with geometries similar to intrusions responsible for the classic regional-contact metamorphism in northwest Maine show that rocks in different locations that have reached the same peak conditions (T (sub max) , P (sub Tmax) ) attained T (sub max) , P (sub Tmax) at different times (t (sub Tmax) ) during the metamorphic event, cross key pelitic isograds at different times ( t (sub G in) , t (sub St in) , t (sub Al-sil in) ) and have different rates of reaction overstepping when an isograd is crossed (dDelta ;G (sub rxn G in) /dt, dDelta ;G (sub rxn St in) /dt, dDelta G (sub rxn Al-sil in) /dt). We have coupled the 4-D thermal models from NW Maine with diffusion controlled nucleation/growth models of metamorphic textures under local equilibrium conditions to demonstrate how rocks with similar peak conditions, but different early thermal histories due to their spatial position, evolve as metamorphism progresses. Traditional methods in metamorphic petrology such as thermobarometry or analysis of mineral assemblages/modes using petrogentic grids or pseudosections are typically reliable tools for determining peak metamorphic conditions (T (sub max) ,P (sub Tmax) ), but they provide little insight into the timing of peak conditions or the P-T history that preceded peak conditions. However, the mineral nucleation/ growth models from this study indicate that insight into the rates that isograds are overstepped is recorded by the size and spatial distributions of index minerals in metamorphic rocks, providing important rate information at several discrete times in a rock's thermal history. JF - Abstracts with Programs - Geological Society of America AU - Foster, C T AU - Dutrow, Barbara L AU - Gable, Carl W AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 81 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645573571?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Time-transient+mineral+nucleation+and+growth+controlled+by+4D+thermal+fields+during+regional-contact+metamorphism&rft.au=Foster%2C+C+T%3BDutrow%2C+Barbara+L%3BGable%2C+Carl+W%3BAnonymous&rft.aulast=Foster&rft.aufirst=C&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=81&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-01-15 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Surface monitoring of dune changes from MSL; current results and upcoming campaigns AN - 1641011582; 2015-002283 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Bridges, Nathan T AU - Le Mouelic, S AU - Herkenhoff, K E AU - Fisk, M AU - Newman, C AU - Maurice, S AU - Rubin, D M AU - Wiens, R C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1849 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - eolian features KW - high-resolution methods KW - imagery KW - dunes KW - monitoring KW - Mars KW - ripple marks KW - bedforms KW - Gale Crater KW - terrestrial planets KW - planets KW - bedding plane irregularities KW - mosaics KW - Mars Science Laboratory KW - HiRISE KW - dune fields KW - sedimentary structures KW - color imagery KW - Bagnold dune field KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011582?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Surface+monitoring+of+dune+changes+from+MSL%3B+current+results+and+upcoming+campaigns&rft.au=Bridges%2C+Nathan+T%3BLe+Mouelic%2C+S%3BHerkenhoff%2C+K+E%3BFisk%2C+M%3BNewman%2C+C%3BMaurice%2C+S%3BRubin%2C+D+M%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Bridges&rft.aufirst=Nathan&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/1849.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 12 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on June 2, 2014 N1 - Last updated - 2014-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Bagnold dune field; bedding plane irregularities; bedforms; color imagery; dune fields; dunes; eolian features; Gale Crater; high-resolution methods; HiRISE; imagery; Mars; Mars Science Laboratory; monitoring; mosaics; planets; ripple marks; sedimentary structures; terrestrial planets ER - TY - JOUR T1 - ChemCam analysis of Martian fine dust AN - 1641011239; 2015-002340 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Lasue, J AU - Maurice, S AU - Cousin, A AU - Forni, Olivier AU - Meslin, P Y AU - Rapin, W AU - Schroeder, S AU - Ollila, A AU - Berger, G AU - Bridges, Nathan T AU - Clegg, S M AU - d'Uston, C AU - Fabre, C AU - Gasnault, O AU - Goetz, W AU - Johnson, J AU - Lanza, N AU - Le Mouelic, S AU - Madsen, M B AU - Mangold, N AU - Melikechi, N AU - Mezzacappa, A AU - Newsom, H AU - Wiens, R C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1224 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - chemical analysis KW - minor elements KW - laser-induced breakdown spectroscopy KW - clastic sediments KW - ChemCam data KW - Mars KW - calibration KW - native elements KW - emission spectroscopy KW - emission spectra KW - terrestrial planets KW - planets KW - graphite KW - major elements KW - hydrogen KW - dust KW - Curiosity Rover KW - sediments KW - LIBS spectra KW - spectra KW - chemical composition KW - spectroscopy KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011239?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=ChemCam+analysis+of+Martian+fine+dust&rft.au=Lasue%2C+J%3BMaurice%2C+S%3BCousin%2C+A%3BForni%2C+Olivier%3BMeslin%2C+P+Y%3BRapin%2C+W%3BSchroeder%2C+S%3BOllila%2C+A%3BBerger%2C+G%3BBridges%2C+Nathan+T%3BClegg%2C+S+M%3Bd%27Uston%2C+C%3BFabre%2C+C%3BGasnault%2C+O%3BGoetz%2C+W%3BJohnson%2C+J%3BLanza%2C+N%3BLe+Mouelic%2C+S%3BMadsen%2C+M+B%3BMangold%2C+N%3BMelikechi%2C+N%3BMezzacappa%2C+A%3BNewsom%2C+H%3BWiens%2C+R+C%3BAnonymous&rft.aulast=Lasue&rft.aufirst=J&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/1224.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 14 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 6, 2014 N1 - Last updated - 2015-04-16 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calibration; ChemCam data; chemical analysis; chemical composition; clastic sediments; Curiosity Rover; dust; emission spectra; emission spectroscopy; graphite; hydrogen; instruments; laser-induced breakdown spectroscopy; LIBS spectra; major elements; Mars; minor elements; native elements; planets; sediments; spectra; spectroscopy; terrestrial planets ER - TY - JOUR T1 - First fluorine detection on Mars with ChemCam on-board MSL AN - 1641011180; 2015-002339 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Forni, Olivier AU - Gaft, M AU - Toplis, M AU - Clegg, S M AU - Ollila, A AU - Sautter, V AU - Nachon, M AU - Gasnault, O AU - Mangold, N AU - Maurice, S AU - Meslin, P Y AU - Schroeder, S AU - Wiens, R C AU - Blaney, D AU - Cousin, A AU - DeFlores, L P AU - Vaniman, D T AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1328 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - halides KW - chlorine KW - calcium chloride KW - sodium chloride KW - fluorides KW - ChemCam data KW - halogens KW - mantle KW - Mars KW - phosphates KW - emission spectra KW - terrestrial planets KW - planets KW - detection KW - fluorine KW - volatile elements KW - Mars Science Laboratory KW - LIBS spectra KW - spectra KW - fluorapatite KW - fluorite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011180?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=First+fluorine+detection+on+Mars+with+ChemCam+on-board+MSL&rft.au=Forni%2C+Olivier%3BGaft%2C+M%3BToplis%2C+M%3BClegg%2C+S+M%3BOllila%2C+A%3BSautter%2C+V%3BNachon%2C+M%3BGasnault%2C+O%3BMangold%2C+N%3BMaurice%2C+S%3BMeslin%2C+P+Y%3BSchroeder%2C+S%3BWiens%2C+R+C%3BBlaney%2C+D%3BCousin%2C+A%3BDeFlores%2C+L+P%3BVaniman%2C+D+T%3BAnonymous&rft.aulast=Forni&rft.aufirst=Olivier&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/1328.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 16 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 6, 2014 N1 - Last updated - 2015-04-16 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calcium chloride; ChemCam data; chlorine; detection; emission spectra; fluorapatite; fluorides; fluorine; fluorite; halides; halogens; LIBS spectra; mantle; Mars; Mars Science Laboratory; phosphates; planets; sodium chloride; spectra; terrestrial planets; volatile elements ER - TY - JOUR T1 - Actin restructuring during Salmonella typhimurium infection investigated by confocal and super-resolution microscopy AN - 1639980968; 21121016 AB - We have used super-resolution optical microscopy and confocal microscopy to visualize the cytoskeletal restructuring of HeLa cells that accompanies and enables Salmonella typhimurium internalization. Herein, we report the use of confocal microscopy to verify and explore infection conditions that would be compatible with super-resolution optical microscopy, using Alexa-488 labeled phalloidin to stain the actin cytoskeletal network. While it is well known that actin restructuring and cytoskeletal rearrangements often accompany and assist in bacterial infection, most studies have employed conventional diffraction-limited fluorescence microscopy to explore these changes. Here we show that the superior spatial resolution provided by single-molecule localization methods (such as direct stochastic optical reconstruction microscopy) enables more precise visualization of the nanoscale changes in the actin cytoskeleton that accompany bacterial infection. In particular, we found that a thin (100-nm) ring of actin often surrounds an invading bacteria 10 to 20 min postinfection, with this ring being transitory in nature. We estimate that a few hundred monofilaments of actin surround the S. typhimurium in this heretofore unreported bacterial internalization intermediate. JF - Journal of Biomedical Optics AU - Han, Jason J AU - Kunde, Yuliya A AU - Hong-Geller, Elizabeth AU - Werner, James H AD - Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos, New Mexico 87545, jwerner@lanl.gov Y1 - 2014/01// PY - 2014 DA - Jan 2014 SP - 016011 EP - 1-016011-8 PB - SPIE - The International Society for Optics and Photonics, P.O. BOX 10 Bellingham WA 98227-0010 United States VL - 19 IS - 1 SN - 1083-3668, 1083-3668 KW - Microbiology Abstracts B: Bacteriology KW - super-resolution KW - fluorescence microscopy KW - host-pathogen KW - bacteria KW - protein KW - Cytoskeleton KW - Optics KW - Confocal microscopy KW - phalloidin KW - Actin KW - spatial discrimination KW - Stains KW - Salmonella typhimurium KW - Infection KW - Stochasticity KW - J 02300:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1639980968?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Biomedical+Optics&rft.atitle=Actin+restructuring+during+Salmonella+typhimurium+infection+investigated+by+confocal+and+super-resolution+microscopy&rft.au=Han%2C+Jason+J%3BKunde%2C+Yuliya+A%3BHong-Geller%2C+Elizabeth%3BWerner%2C+James+H&rft.aulast=Han&rft.aufirst=Jason&rft.date=2014-01-01&rft.volume=19&rft.issue=1&rft.spage=016011&rft.isbn=&rft.btitle=&rft.title=Journal+of+Biomedical+Optics&rft.issn=10833668&rft_id=info:doi/10.1117%2F1.JBO.19.1.016011 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Cytoskeleton; Optics; Confocal microscopy; phalloidin; spatial discrimination; Actin; Stains; Infection; Stochasticity; Salmonella typhimurium DO - http://dx.doi.org/10.1117/1.JBO.19.1.016011 ER - TY - JOUR T1 - Rapid evaluation and quality control of next generation sequencing data with FaQCs AN - 1635025518; 21092491 AB - Background: Next generation sequencing (NGS) technologies that parallelize the sequencing process and produce thousands to millions, or even hundreds of millions of sequences in a single sequencing run, have revolutionized genomic and genetic research. Because of the vagaries of any platform's sequencing chemistry, the experimental processing, machine failure, and so on, the quality of sequencing reads is never perfect, and often declines as the read is extended. These errors invariably affect downstream analysis/application and should therefore be identified early on to mitigate any unforeseen effects. Results: Here we present a novel FastQ Quality Control Software (FaQCs) that can rapidly process large volumes of data, and which improves upon previous solutions to monitor the quality and remove poor quality data from sequencing runs. Both the speed of processing and the memory footprint of storing all required information have been optimized via algorithmic and parallel processing solutions. The trimmed output compared side-by-side with the original data is part of the automated PDF output. We show how this tool can help data analysis by providing a few examples, including an increased percentage of reads recruited to references, improved single nucleotide polymorphism identification as well as de novo sequence assembly metrics. Conclusion: FaQCs combines several features of currently available applications into a single, user-friendly process, and includes additional unique capabilities such as filtering the PhiX control sequences, conversion of FASTQ formats, and multi-threading. The original data and trimmed summaries are reported within a variety of graphics and reports, providing a simple way to do data quality control and assurance. JF - BMC Bioinformatics AU - Lo, Chien-Chi AU - Chain, Patrick S G AD - Bioenergy and Biome Sciences Group, Los Alamos National Laboratory, Los Alamos 87545, NM, USA Y1 - 2014 PY - 2014 DA - 2014 SP - 366 PB - BioMed Central Ltd., Middlesex House London W1T 4LB United Kingdom VL - 15 IS - 1 SN - 1471-2105, 1471-2105 KW - Biotechnology and Bioengineering Abstracts KW - Quality control KW - Trimming KW - Next generation sequencing analysis KW - Data preprocessing KW - Computer programs KW - software KW - Memory KW - Data processing KW - Single-nucleotide polymorphism KW - genomics KW - Bioinformatics KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1635025518?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=BMC+Bioinformatics&rft.atitle=Rapid+evaluation+and+quality+control+of+next+generation+sequencing+data+with+FaQCs&rft.au=Lo%2C+Chien-Chi%3BChain%2C+Patrick+S+G&rft.aulast=Lo&rft.aufirst=Chien-Chi&rft.date=2014-01-01&rft.volume=15&rft.issue=1&rft.spage=366&rft.isbn=&rft.btitle=&rft.title=BMC+Bioinformatics&rft.issn=14712105&rft_id=info:doi/10.1186%2Fs12859-014-0366-2 L2 - http://www.biomedcentral.com/1471-2105/15/366 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Number of references - 15 N1 - Last updated - 2014-12-11 N1 - SubjectsTermNotLitGenreText - Computer programs; Memory; software; Data processing; Single-nucleotide polymorphism; Quality control; Bioinformatics; genomics DO - http://dx.doi.org/10.1186/s12859-014-0366-2 ER - TY - JOUR T1 - Feldspar-rich rocks at Gale Crater; a ChemCam campaign AN - 1629943631; 2014-094032 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Sautter, Violaine AU - Fabre, C AU - Cousin, A AU - Toplis, M AU - Wiens, R AU - Forni, O AU - Maurice, S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2191 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - silicates KW - Mars KW - ejecta KW - Gale Crater KW - terrestrial planets KW - planets KW - major elements KW - lava KW - alluvial fans KW - ChemCam KW - framework silicates KW - spectra KW - trace elements KW - feldspar group KW - phenocrysts KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943631?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Feldspar-rich+rocks+at+Gale+Crater%3B+a+ChemCam+campaign&rft.au=Sautter%2C+Violaine%3BFabre%2C+C%3BCousin%2C+A%3BToplis%2C+M%3BWiens%2C+R%3BForni%2C+O%3BMaurice%2C+S%3BAnonymous&rft.aulast=Sautter&rft.aufirst=Violaine&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2191&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 4 N1 - Last updated - 2014-12-04 N1 - SubjectsTermNotLitGenreText - alluvial fans; ChemCam; ejecta; feldspar group; framework silicates; Gale Crater; lava; major elements; Mars; phenocrysts; planets; silicates; spectra; terrestrial planets; trace elements ER - TY - JOUR T1 - Cosmogenic and nucleosynthetic anomalies resolved in IVB meteorites using palladium isotopes AN - 1629940208; 2014-096453 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Mayer, B AU - Humayun, M AU - Wittig, N AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2581 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - isotopes KW - refractory materials KW - mass spectra KW - cosmogenic elements KW - platinum group KW - partitioning KW - meteorites KW - r-process KW - tungsten KW - iron meteorites KW - molybdenum KW - cosmic rays KW - spectra KW - s-process KW - palladium KW - anomalies KW - siderophile elements KW - nucleosynthesis KW - ICP mass spectra KW - IVB iron meteorites KW - platinum KW - metals KW - osmium KW - ruthenium KW - chemical fractionation KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940208?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Cosmogenic+and+nucleosynthetic+anomalies+resolved+in+IVB+meteorites+using+palladium+isotopes&rft.au=Mayer%2C+B%3BHumayun%2C+M%3BWittig%2C+N%3BAnonymous&rft.aulast=Mayer&rft.aufirst=B&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/2581.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 17 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Aug. 11, 2014 N1 - Last updated - 2014-12-04 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - anomalies; chemical fractionation; cosmic rays; cosmogenic elements; ICP mass spectra; iron meteorites; isotopes; IVB iron meteorites; mass spectra; metals; meteorites; molybdenum; nucleosynthesis; osmium; palladium; partitioning; platinum; platinum group; r-process; refractory materials; ruthenium; s-process; siderophile elements; spectra; tungsten ER - TY - JOUR T1 - Manganese trends with depth on rock surfaces in Gale Crater, Mars AN - 1623272183; 2014-091009 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Lanza, N L AU - Ollila, A M AU - Cousin, A AU - Hardgrove, C AU - Wiens, R C AU - Mangold, N AU - Nachon, M AU - Fabre, C AU - Bridges, N AU - Johnson, J B AU - Le Mouelic, S AU - Cooper, D AU - Schmidt, M E AU - Berger, J AU - Bell, J AU - Arvidson, R E AU - Mezzacappa, A AU - Jackson, R AU - Clegg, S AU - Clark, B C AU - Forni, O AU - Melikechi, N AU - Newsom, H AU - Tokar, R AU - Maurice, S AU - Anderson, R B AU - Blank, J AU - Deans, M AU - Delapp, D AU - Fischer, W AU - Grotzinger, J AU - Lasue, J AU - Leveille, R AU - McInroy, R AU - Martinez, R AU - Meslin, P Y AU - Sautter, V AU - Vaniman, D T AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2599 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - ChemCam instrument KW - encrustations KW - oxidation KW - astrobiology KW - Mars KW - manganese KW - depth KW - Gale Crater KW - emission spectra KW - terrestrial planets KW - hydroxides KW - planets KW - water-rock interaction KW - metals KW - rock varnish KW - manganese oxides KW - oxides KW - LIBS spectra KW - terrestrial comparison KW - spectra KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623272183?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Manganese+trends+with+depth+on+rock+surfaces+in+Gale+Crater%2C+Mars&rft.au=Lanza%2C+N+L%3BOllila%2C+A+M%3BCousin%2C+A%3BHardgrove%2C+C%3BWiens%2C+R+C%3BMangold%2C+N%3BNachon%2C+M%3BFabre%2C+C%3BBridges%2C+N%3BJohnson%2C+J+B%3BLe+Mouelic%2C+S%3BCooper%2C+D%3BSchmidt%2C+M+E%3BBerger%2C+J%3BBell%2C+J%3BArvidson%2C+R+E%3BMezzacappa%2C+A%3BJackson%2C+R%3BClegg%2C+S%3BClark%2C+B+C%3BForni%2C+O%3BMelikechi%2C+N%3BNewsom%2C+H%3BTokar%2C+R%3BMaurice%2C+S%3BAnderson%2C+R+B%3BBlank%2C+J%3BDeans%2C+M%3BDelapp%2C+D%3BFischer%2C+W%3BGrotzinger%2C+J%3BLasue%2C+J%3BLeveille%2C+R%3BMcInroy%2C+R%3BMartinez%2C+R%3BMeslin%2C+P+Y%3BSautter%2C+V%3BVaniman%2C+D+T%3BAnonymous&rft.aulast=Lanza&rft.aufirst=N&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/2599.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 26 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 26, 2014 N1 - Last updated - 2014-11-13 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - astrobiology; ChemCam instrument; depth; emission spectra; encrustations; Gale Crater; hydroxides; LIBS spectra; manganese; manganese oxides; Mars; metals; oxidation; oxides; planets; rock varnish; spectra; terrestrial comparison; terrestrial planets; water-rock interaction ER - TY - JOUR T1 - Reflectance spectroscopy from ChemCam passive observations at the Curiosity landing site, Mars AN - 1623261381; 2014-089468 AB - The spectrometers on the Mars Science Laboratory (MSL) ChemCam instrument were used in passive mode to record visible/near-infrared (400-840 nm) radiance from the martian surface. Using the onboard ChemCam calibration targets' housing as a reflectance standard, we developed methods to collect, calibrate, and reduce radiance observations to relative reflectance. Such measurements accurately reproduce the known reflectance spectra of other calibration targets on the rover, and represent the highest spatial resolution (0.65 mrad) and spectral sampling (<1 nm) visible/near-infrared reflectance spectra from a landed platform on Mars. Relative reflectance spectra of surface rocks and soils match those from orbital observations and multispectral data from the MSL Mastcam camera. Preliminary analyses of the band depths, spectral slopes, and reflectance ratios of the more than 2,000 spectra taken during the first year of MSL operations demonstrate at least six spectral classes of materials distinguished by variations in ferrous and ferric components. Initial comparisons of ChemCam spectra to laboratory spectra of minerals and Mars analog materials demonstrate similarities with palagonitic soils and indications of orthopyroxene in some dark rocks. Magnesium-rich "raised ridges" tend to exhibit distinct near-infrared slopes. The ferric absorption downturn typically found for martian materials at <600 nm is greatly subdued in brushed rocks and drill tailings, consistent with their more ferrous nature. Calcium-sulfate veins exhibit the highest relative reflectances observed, but are still relatively red owing to the effects of residual dust. Such dust is overall less prominent on rocks sampled within the "blast zone" immediately surrounding the landing site. These samples were likely affected by the landing thrusters, which partially removed the ubiquitous dust coatings. Increased dust coatings on the calibration targets during the first year of the mission were documented by the ChemCam passive measurements as well. Ongoing efforts to model and correct for this dust component should improve calibration of the relative reflectance spectra. Additional data will be acquired during the rover's future examinations of hematite-, sulfate-, and phyllosilicate-bearing materials near the base of Mt. Sharp. JF - Abstracts with Programs - Geological Society of America AU - Johnson, Jeffrey R AU - Bell, James F, III AU - Bender, Steve AU - Blaney, Diana AU - Cloutis, Edward A AU - Lemmon, Mark AU - Le Mouelic, Stephan AU - Maurice, Sylvestre AU - Rice, Melissa S AU - Wiens, Roger C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 40 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 2 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623261381?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Reflectance+spectroscopy+from+ChemCam+passive+observations+at+the+Curiosity+landing+site%2C+Mars&rft.au=Johnson%2C+Jeffrey+R%3BBell%2C+James+F%2C+III%3BBender%2C+Steve%3BBlaney%2C+Diana%3BCloutis%2C+Edward+A%3BLemmon%2C+Mark%3BLe+Mouelic%2C+Stephan%3BMaurice%2C+Sylvestre%3BRice%2C+Melissa+S%3BWiens%2C+Roger+C%3BAnonymous&rft.aulast=Johnson&rft.aufirst=Jeffrey&rft.date=2014-01-01&rft.volume=46&rft.issue=2&rft.spage=40&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2014NE/webprogram/Paper235287.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 49th annual meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-11-13 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Overview of Properties and Performance of Uranium-Silicide Compounds for Light Water Reactor Applications AN - 1567078182; 20432629 AB - The uranium-silicon binary system possesses a range of compounds that have been historically investigated and utilized to a limited extent as nuclear reactor fuels. Of the multiple compounds, U sub(3)Si and U sub(3)Si sub(2) are most familiar; their high uranium densities have made them an intriguing choice for incorporation into composite plate fuels in research reactors and other low power core redesigns where retained neutronic performance was desired at lower enrichments [1], This increased uranium density compared with uranium dioxide (UO sub(2)) has made them attractive to a new generation of nuclear fuels research driven by the renewed push for accident-tolerant light water reactor (LWR) fuels. A higher uranium density may motivate incorporation of U-Si phases into composite fuels that utilize secondary phases with the goal of increasing coping time during a cladding breach before fission products and/or actinides are released. Additionally, development of fuels containing higher uranium densities than those of reference UO sub(2) could facilitate utilization of alternative cladding materials that offer improved high temperature performance than zirconium alloys but incur neutronic penalties. JF - Transactions of the American Nuclear Society AU - Nelson, A T AU - White, J T AU - Byler, D D AU - Dunwoody, J T AU - Valdez, J A AU - McClellan, K J AD - Los Alamos National Laboratory, P.O. Box 1667, Los Alamos, NM, 87545 atnelson@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 987 EP - 989 PB - American Nuclear Society, Inc. VL - 110 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Zirconium base alloys KW - Phases KW - Cladding KW - Uranium KW - Density KW - Nuclear fuels KW - Light water reactors KW - Enrichment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567078182?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Overview+of+Properties+and+Performance+of+Uranium-Silicide+Compounds+for+Light+Water+Reactor+Applications&rft.au=Nelson%2C+A+T%3BWhite%2C+J+T%3BByler%2C+D+D%3BDunwoody%2C+J+T%3BValdez%2C+J+A%3BMcClellan%2C+K+J&rft.aulast=Nelson&rft.aufirst=A&rft.date=2014-01-01&rft.volume=110&rft.issue=&rft.spage=987&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-10-03 ER - TY - JOUR T1 - Oxidation Resistance of Uranium-Silicide Bearing Composites for Advanced Nuclear Reactor Applications LA-UR 14-20517 AN - 1567078155; 20432579 AB - The uranium-silicon binary system contains multiple intermetallic compounds that have received varying degrees of interest from the scientific community, as well as limited usage as reactor fuel [1]. Most of the uraniumsilicide compounds of technological interest exhibit higher uranium densities and increased thermal conductivities with temperature than fuels typically used in current reactor designs. Replacement of highly enriched uranium fuel forms with lower, more proliferation resistant enrichments remains the dominant application for uranium-silicide compounds. However, renewed international interest in development of accidenttolerant light water reactor fuels has seen advancement of composite fuel designs that aim to incorporate oxidationresistant phases into the fuel/cladding system in order to increase coping time during a loss-of-coolant accident. Such an approach will generally require displacement of uranium-bearing phases or introduction of cladding materials with higher neutron cross sections compared with reference zirconium cladding alloys. In this case, some reactor performance can only be retained if the uranium enrichment is increased. This represents a possible, but costly, option to fuel fabrication facilities. The alternative is to incorporate fissile phases that possess a uranium density greater than the reference uranium dioxide. Uranium-silicide compounds could offer significant advantages to such an approach given its superior uranium density. However, the thermodynamic stability of uranium-silicon compounds under temperatures and atmospheres relevant to both steady state operation and potential transients remains largely unknown. Experimental studies must be executed and their results evaluated in order to fully assess the potential of U-Si phases to improve the performance of light water reactor fuels. JF - Transactions of the American Nuclear Society AU - White, J T AU - Nelson, A T AU - Dunwoody, J T AU - McClellan, K J AD - Los Alamos National Laboratory, P.O. Box 1667, Los Alamos, NM, 87545 jtwhite@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 840 EP - 841 PB - American Nuclear Society, Inc. VL - 110 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Advanced Polymers Abstracts (EP); Environmental Engineering Abstracts (EN); Composites Industry Abstracts (ED); Engineered Materials Abstracts, Ceramics (EC); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Phases KW - Cladding KW - Uranium KW - Fuels KW - Density KW - Nuclear fuels KW - Light water reactors KW - Enrichment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567078155?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Oxidation+Resistance+of+Uranium-Silicide+Bearing+Composites+for+Advanced+Nuclear+Reactor+Applications+LA-UR+14-20517&rft.au=White%2C+J+T%3BNelson%2C+A+T%3BDunwoody%2C+J+T%3BMcClellan%2C+K+J&rft.aulast=White&rft.aufirst=J&rft.date=2014-01-01&rft.volume=110&rft.issue=&rft.spage=840&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-10-03 ER - TY - JOUR T1 - Production of Energetic Light Fragments with Expanded Cascade Exciton Model (CEM) AN - 1567065886; 20432477 AB - Emission of light fragments (LF) from nuclear reactions is an interesting open question. Different reaction mechanisms contribute to their production; the relative roles of each, and how they change with incident energy, mass number of the target, and the type and emission energy of the fragments is not completely understood. JF - Transactions of the American Nuclear Society AU - Kerby, Leslie M AU - Mashnik, Stepan G AU - Tokuhiro, Akira T AD - Los Alamos National Laboratory, Los Alamos, NM 87545; University of Idaho, Moscow, ID 83844 lkerby@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 465 EP - 467 PB - American Nuclear Society, Inc. VL - 110 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear reactions KW - Reaction mechanisms KW - Energy (nuclear) KW - Fragments KW - Atomic properties KW - Emission KW - Cascades KW - LF UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567065886?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Production+of+Energetic+Light+Fragments+with+Expanded+Cascade+Exciton+Model+%28CEM%29&rft.au=Kerby%2C+Leslie+M%3BMashnik%2C+Stepan+G%3BTokuhiro%2C+Akira+T&rft.aulast=Kerby&rft.aufirst=Leslie&rft.date=2014-01-01&rft.volume=110&rft.issue=&rft.spage=465&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-10-03 ER - TY - JOUR T1 - Modeling Constituent Redistribution in U-Pu-Zr Metallic Fuel Using the Advanced Fuel Performance Code BISON AN - 1567055766; 20432608 AB - The Advanced Fuels Campaign (AFC) metallic fuels currently being tested have higher zirconium and plutonium concentrations than those tested in the past in EBR reactors. Current metal fuel performance codes have limitations and deficiencies in predicting AFC fuel performance, particularly in the modeling of constituent distribution. No fully validated code exists due to sparse data and unknown modeling parameters. Our primary objective is to develop an initial analysis tool by incorporating state-of-the-art knowledge, constitutive models and properties of AFC metal fuels into the MOOSE/BISON (1) framework in order to analyze AFC metallic fuel tests. JF - Transactions of the American Nuclear Society AU - Galloway, Jack AU - Unal, Cetin AU - Carlson, Neil AU - Porter, Douglas AU - Hayes, Steve AD - Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, United States jackg@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 922 EP - 924 PB - American Nuclear Society, Inc. VL - 110 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); METADEX (MD); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Mathematical models KW - Moose KW - Constituents KW - Fuels KW - Nuclear fuels KW - Bison KW - Metal fuels KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567055766?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Modeling+Constituent+Redistribution+in+U-Pu-Zr+Metallic+Fuel+Using+the+Advanced+Fuel+Performance+Code+BISON&rft.au=Galloway%2C+Jack%3BUnal%2C+Cetin%3BCarlson%2C+Neil%3BPorter%2C+Douglas%3BHayes%2C+Steve&rft.aulast=Galloway&rft.aufirst=Jack&rft.date=2014-01-01&rft.volume=110&rft.issue=&rft.spage=922&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-10-03 ER - TY - JOUR T1 - Irradiation Effects on LWR Accident Tolerant Fuels Cladding Materials AN - 1562675728; 20432635 AB - In light of the Fukishima incident in 2011, work has been ongoing worldwide to improve the performance of light water reactor (LWR) cladding and fuels during accident scenarios. These accident tolerant fuels (ATF) and claddings are generally designed to last longer during loss of coolant accidents. This paper describes the work on the irradiation performance of various candidates for ATF claddings, including ferritic FeCrAl alloys, high chromium oxide dispersion strengthened (ODS) steels, and higher chromium ferritic/martensitc steels. JF - Transactions of the American Nuclear Society AU - Saleh, Tarik A AU - Anderoglu, Osman AU - Maloy, Stuart A AU - Odette, G Robert AU - Romero, Tobias J AD - Los Alamos National Laboratory, PO Box 1663 Los Alamos, NM 87545, tsaleh@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 1004 EP - 1005 PB - American Nuclear Society, Inc. VL - 110 SN - 0003-018X, 0003-018X KW - Health & Safety Science Abstracts KW - Accidents KW - Nuclear reactors KW - Fuels KW - Irradiation KW - Nuclear fuels KW - Occupational safety KW - Alloys KW - Steel KW - Loss of coolant accidents KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1562675728?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Irradiation+Effects+on+LWR+Accident+Tolerant+Fuels+Cladding+Materials&rft.au=Saleh%2C+Tarik+A%3BAnderoglu%2C+Osman%3BMaloy%2C+Stuart+A%3BOdette%2C+G+Robert%3BRomero%2C+Tobias+J&rft.aulast=Saleh&rft.aufirst=Tarik&rft.date=2014-01-01&rft.volume=110&rft.issue=&rft.spage=1004&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Accidents; Nuclear reactors; Irradiation; Fuels; Occupational safety; Nuclear fuels; Alloys; Loss of coolant accidents; Steel ER - TY - JOUR T1 - High temperature oxidation of molybdenum in water vapor environments AN - 1562672047; 20433040 AB - Molybdenum has recently gained attention as a candidate cladding material for use in light water reactors. Its excellent high temperature mechanical properties and stability under irradiation suggest that it could offer benefits to performance under a wide range of reactor conditions, but little is known about its oxidation behavior in water vapor containing atmospheres. The current study was undertaken to elucidate the oxidation behavior of molybdenum in water vapor environments to 1200 [degrees]C in order to provide an initial assessment of its feasibility as a light water reactor cladding. Initial observations indicate that at temperatures below 1000 [degrees]C, the kinetics of mass loss in water vapor would not be detrimental to cladding integrity during an off-normal event. Above 1000[degrees]C, degradation is more rapid but remains slower than observed for optimized zirconium cladding alloys. The effect of hydrogen-water vapor and oxygen-water vapor mixtures on material loss was also explored at elevated temperatures. Parts-per-million levels of either hydrogen or oxygen will minimally impact performance, but hydrogen contents in excess of 1000 ppm were observed to limit volatilization at 1000 [degrees]C. JF - Journal of Nuclear Materials AU - Nelson, A T AU - Sooby, E S AU - Kim, Y-J AU - Cheng, B AU - Maloy, S A AD - Los Alamos National Laboratory, Los Alamos, NM 87545, United States, atnelson@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 441 EP - 447 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 448 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Feasibility studies KW - Water vapor KW - Molybdenum KW - Temperature KW - Zirconium KW - Hydrogen KW - Oxygen KW - Vapors KW - Nuclear reactors KW - Kinetics KW - High temperature KW - Radioactive materials KW - Oxidation KW - Alloys KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1562672047?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=High+temperature+oxidation+of+molybdenum+in+water+vapor+environments&rft.au=Nelson%2C+A+T%3BSooby%2C+E+S%3BKim%2C+Y-J%3BCheng%2C+B%3BMaloy%2C+S+A&rft.aulast=Nelson&rft.aufirst=A&rft.date=2014-01-01&rft.volume=448&rft.issue=1-3&rft.spage=441&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2013.10.043 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 24 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Feasibility studies; Water vapor; Molybdenum; Temperature; Zirconium; Hydrogen; Oxygen; Vapors; Nuclear reactors; High temperature; Kinetics; Oxidation; Radioactive materials; Alloys DO - http://dx.doi.org/10.1016/j.jnucmat.2013.10.043 ER - TY - JOUR T1 - Groundwater remediation using the information gap decision theory AN - 1560132845; 19433866 AB - One of the challenges in the design and selection of remediation activities for subsurface contamination is dealing with manifold uncertainties. A scientifically defensible decision process demands consideration of the uncertainties involved. A nonprobabilistic approach based on information gap (info-gap) decision theory is employed to study the robustness of alternative remediation activities. This approach incorporates both parametric and nonparametric (conceptual) uncertainty in predicting contaminant concentrations that are effected by natural processes and the remediation activities. Two remedial scenarios are explored to demonstrate the applicability of the info-gap approach to decision making related to groundwater remediation. Key Points * Info-gap decision theory (IGDT) accounts for parametric uncertainty * IGDT accounts for nonparametric uncertainty * IGDT can be used to choose between different remediation techniques JF - Water Resources Research AU - O'Malley, D AU - Vesselinov, V V AD - Computational Earth Science Group, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2014/01// PY - 2014 DA - Jan 2014 SP - 246 EP - 256 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 50 IS - 1 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Pollution Abstracts; Water Resources Abstracts; Aqualine Abstracts KW - decision theory KW - uncertainty analysis KW - groundwater remediation KW - Groundwater hydrology KW - Bioremediation KW - Contamination KW - Water resources KW - Groundwater Pollution KW - Decision Making KW - Pollutants KW - Ground water KW - Water Pollution Treatment KW - Manifolds KW - Decision making KW - Remediation KW - Groundwater pollution KW - Groundwater KW - Water resources research KW - Q5 08503:Characteristics, behavior and fate KW - AQ 00006:Sewage KW - P 2000:FRESHWATER POLLUTION KW - M2 556.18:Water Management (556.18) KW - SW 0840:Groundwater UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560132845?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Groundwater+remediation+using+the+information+gap+decision+theory&rft.au=O%27Malley%2C+D%3BVesselinov%2C+V+V&rft.aulast=O%27Malley&rft.aufirst=D&rft.date=2014-01-01&rft.volume=50&rft.issue=1&rft.spage=246&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR014718 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-01-21 N1 - SubjectsTermNotLitGenreText - Contamination; Manifolds; Remediation; Ground water; Water resources; Groundwater hydrology; Groundwater pollution; Water resources research; Decision making; Bioremediation; Pollutants; Water Pollution Treatment; Groundwater Pollution; Decision Making; Groundwater DO - http://dx.doi.org/10.1002/2013WR014718 ER - TY - JOUR T1 - Modelling fluid flow in domains containing moving interfaces AN - 1559691285; 20238716 AB - A method for the numerical simulations of fluid flow in domains containing moving rigid objects or boundaries is presented, which falls into the general category of arbitrary Lagrangian-Eulerian methods. The method is based on a fixed mesh that is modified locally both in space and time to describe the moving interfaces that are allowed to displace independently of the mesh. It results in a fully robust formulation capable of calculating in irregular meshes on domains of complex geometry containing moving devises without danger of the mesh becoming unsuitable due to its continuous deformation. This work presents the ideas in the context of two space dimensions, and constitutes the first stage in the development of a three-dimensional model to interface with the KIVA simulator developed by Los Alamos National Laboratory. The method's capabilities and accuracy are assessed using several examples including a case that has an analytical solution. JF - Progress in Computational Fluid Dynamics AU - Carrington, David B AU - Munoz, Dominic A AU - Heinrich, Juan C AD - Los Alamos National Laboratory, Theoretical Division T-03 Fluid Dynamics, P.O. Box 1663, MS-B216, Los Alamos, NM 87545, USA Y1 - 2014///0, PY - 2014 DA - 0, 2014 SP - 139 EP - 150 PB - Inderscience Publishers Ltd., PO Box 735 Olney Bucks MK46 5WB United Kingdom VL - 14 IS - 3 SN - 1468-4349, 1468-4349 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - SCIENCE, ENGINEERING AND TECHNOLOGY KW - COMPUTING AND MATHEMATICS KW - Applied Mechanics and Gas Dynamics KW - Computing Science, Applications and Software KW - Simulation and Modelling KW - Hydrodynamics KW - Simulators KW - Fluid Flow KW - Interfaces KW - Laboratories KW - USA, New Mexico, Los Alamos KW - Model Studies KW - Hazards KW - Boundaries KW - Fluid dynamics KW - Fluid flow KW - Deformation KW - Modelling KW - SW 0810:General KW - Q2 09183:Physics and chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1559691285?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Progress+in+Computational+Fluid+Dynamics&rft.atitle=Modelling+fluid+flow+in+domains+containing+moving+interfaces&rft.au=Carrington%2C+David+B%3BMunoz%2C+Dominic+A%3BHeinrich%2C+Juan+C&rft.aulast=Carrington&rft.aufirst=David&rft.date=2014-01-01&rft.volume=14&rft.issue=3&rft.spage=139&rft.isbn=&rft.btitle=&rft.title=Progress+in+Computational+Fluid+Dynamics&rft.issn=14684349&rft_id=info:doi/10.1504%2FPCFD.2014.062429 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Hazards; Simulators; Fluid dynamics; Fluid flow; Modelling; Deformation; Hydrodynamics; Fluid Flow; Laboratories; Interfaces; Boundaries; Model Studies; USA, New Mexico, Los Alamos DO - http://dx.doi.org/10.1504/PCFD.2014.062429 ER - TY - JOUR T1 - Aerosol single scattering albedo dependence on biomass combustion efficiency: Laboratory and field studies AN - 1559668845; 19433374 AB - Single scattering albedo ( omega ) of fresh biomass burning (BB) aerosols produced from 92 controlled laboratory combustion experiments of 20 different woods and grasses was analyzed to determine the factors that control the variability in omega . Results show that omega varies strongly with fire-integrated modified combustion efficiency (MCE sub(FI))-higher MCE sub(FI) results in lower omega values and greater spectral dependence of omega . A parameterization of omega as a function of MCE sub(FI) for fresh BB aerosols is derived from the laboratory data and is evaluated by field observations from two wildfires. The parameterization suggests that MCE sub(FI) explains 60% of the variability in omega , while the 40% unexplained variability could be accounted for by other parameters such as fuel type. Our parameterization provides a promising framework that requires further validation and is amenable for refinements to predict omega with greater confidence, which is critical for estimating the radiative forcing of BB aerosols. Key Points * Aerosol single scattering albedo depends most strongly on combustion efficiency * Parameterization of single scattering albedo of fresh biomass burning aerosols * Strong spectral variation of single scattering albedo is observed JF - Geophysical Research Letters AU - Liu, Shang AU - Aiken, Allison C AU - Arata, Caleb AU - Dubey, Manvendra K AU - Stockwell, Chelsea E AU - Yokelson, Robert J AU - Stone, Elizabeth A AU - Jayarathne, Thilina AU - Robinson, Allen L AU - DeMott, Paul J AU - Kreidenweis, Sonia M AD - Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA. Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 742 EP - 748 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 41 IS - 2 SN - 0094-8276, 0094-8276 KW - Mechanical & Transportation Engineering Abstracts (MT); Earthquake Engineering Abstracts (EQ); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - biomass burning KW - single scattering albedo KW - combustion efficiency KW - brown carbon KW - wavelength dependence KW - FLAME KW - Combustion efficiency KW - Scattering KW - Aerosols KW - Radiative forcing KW - Albedo KW - Spectra KW - Parametrization KW - Biomass burning UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1559668845?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Aerosol+single+scattering+albedo+dependence+on+biomass+combustion+efficiency%3A+Laboratory+and+field+studies&rft.au=Liu%2C+Shang%3BAiken%2C+Allison+C%3BArata%2C+Caleb%3BDubey%2C+Manvendra+K%3BStockwell%2C+Chelsea+E%3BYokelson%2C+Robert+J%3BStone%2C+Elizabeth+A%3BJayarathne%2C+Thilina%3BRobinson%2C+Allen+L%3BDeMott%2C+Paul+J%3BKreidenweis%2C+Sonia+M&rft.aulast=Liu&rft.aufirst=Shang&rft.date=2014-01-01&rft.volume=41&rft.issue=2&rft.spage=742&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2013GL058392 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1002/2013GL058392 ER - TY - JOUR T1 - Geochemical diversity in first rocks examined by the Curiosity Rover in Gale Crater; evidence for and significance of an alkali and volatile-rich igneous source AN - 1553085306; 2014-064364 AB - The first four rocks examined by the Mars Science Laboratory Alpha Particle X-ray Spectrometer indicate that Curiosity landed in a lithologically diverse region of Mars. These rocks, collectively dubbed the Bradbury assemblage, were studied along an eastward traverse (sols 46-102). Compositions range from Na- and Al-rich mugearite Jake_Matijevic to Fe-, Mg-, and Zn-rich alkali-rich basalt/hawaiite Bathurst_Inlet and span nearly the entire range in FeO* and MnO of the data sets from previous Martian missions and Martian meteorites. The Bradbury assemblage is also enriched in K and moderately volatile metals (Zn and Ge). These elements do not correlate with Cl or S, suggesting that they are associated with the rocks themselves and not with salt-rich coatings. Three out of the four Bradbury rocks plot along a line in elemental variation diagrams, suggesting mixing between Al-rich and Fe-rich components. ChemCam analyses give insight to their degree of chemical heterogeneity and grain size. Variations in trace elements detected by ChemCam suggest chemical weathering (Li) and concentration in mineral phases (e.g., Rb and Sr in feldspars). We interpret the Bradbury assemblage to be broadly volcanic and/or volcaniclastic, derived either from near the Gale crater rim and transported by the Peace Vallis fan network, or from a local volcanic source within Gale Crater. High Fe and Fe/Mn in Et_Then likely reflect secondary precipitation of Fe (super 3+) oxides as a cement or rind. The K-rich signature of the Bradbury assemblage, if igneous in origin, may have formed by small degrees of partial melting of metasomatized mantle. Abstract Copyright (2013), The Authors. JF - Journal of Geophysical Research: Planets AU - Schmidt, M E AU - Campbell, John L AU - Gellert, R AU - Perrett, G M AU - Treiman, A H AU - Blaney, D L AU - Olilla, A AU - Calef, F J, III AU - Edgar, L AU - Elliott, B E AU - Grotzinger, John P AU - Hurowitz, J AU - King, P L AU - Minitti, M E AU - Sautter, Violaine AU - Stack, K AU - Berger, J A AU - Bridges, John C AU - Ehlmann, B L AU - Forni, Olivier AU - Leshin, Laurie A AU - Lewis, K W AU - McLennan, Scott M AU - Ming, Douglas W AU - Newsom, H AU - Pradler, I AU - Squyres, Steven W AU - Stolper, E M AU - Thompson, L AU - VanBommel, S AU - Wiens, Roger C Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 64 EP - 81 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 1 SN - 2169-9097, 2169-9097 KW - silicates KW - stony meteorites KW - iron oxides KW - Martian meteorites KW - olivine group KW - Gale Crater KW - mugearite KW - meteorites KW - mineral composition KW - clinopyroxene KW - alkali feldspar KW - basalts KW - orthosilicates KW - X-ray analysis KW - ChemCam KW - framework silicates KW - chain silicates KW - Peace Vallis KW - apatite KW - plagioclase KW - chromite KW - alkalic composition KW - terrestrial planets KW - planets KW - orthoclase KW - nepheline KW - X-ray spectroscopy KW - potassium KW - Mars Science Laboratory KW - spectroscopy KW - feldspar group KW - strontium KW - ilmenite KW - alkali basalts KW - zinc KW - volcanic rocks KW - igneous rocks KW - partial melting KW - mantle KW - Mars KW - landing sites KW - metasomatism KW - manganese KW - iron KW - pyroxene group KW - alpha-ray spectroscopy KW - olivine KW - Curiosity Rover KW - oxides KW - nepheline group KW - diopside KW - chemical composition KW - alkaline earth metals KW - Bradbury Landing KW - rubidium KW - alkali metals KW - phosphates KW - achondrites KW - ferrous iron KW - nesosilicates KW - volatiles KW - metals KW - germanium KW - magnetite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553085306?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Geochemical+diversity+in+first+rocks+examined+by+the+Curiosity+Rover+in+Gale+Crater%3B+evidence+for+and+significance+of+an+alkali+and+volatile-rich+igneous+source&rft.au=Schmidt%2C+M+E%3BCampbell%2C+John+L%3BGellert%2C+R%3BPerrett%2C+G+M%3BTreiman%2C+A+H%3BBlaney%2C+D+L%3BOlilla%2C+A%3BCalef%2C+F+J%2C+III%3BEdgar%2C+L%3BElliott%2C+B+E%3BGrotzinger%2C+John+P%3BHurowitz%2C+J%3BKing%2C+P+L%3BMinitti%2C+M+E%3BSautter%2C+Violaine%3BStack%2C+K%3BBerger%2C+J+A%3BBridges%2C+John+C%3BEhlmann%2C+B+L%3BForni%2C+Olivier%3BLeshin%2C+Laurie+A%3BLewis%2C+K+W%3BMcLennan%2C+Scott+M%3BMing%2C+Douglas+W%3BNewsom%2C+H%3BPradler%2C+I%3BSquyres%2C+Steven+W%3BStolper%2C+E+M%3BThompson%2C+L%3BVanBommel%2C+S%3BWiens%2C+Roger+C&rft.aulast=Schmidt&rft.aufirst=M&rft.date=2014-01-01&rft.volume=119&rft.issue=1&rft.spage=64&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004481 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 114 N1 - PubXState - DC N1 - Document feature - illus. incl. 8 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - achondrites; alkali basalts; alkali feldspar; alkali metals; alkalic composition; alkaline earth metals; alpha-ray spectroscopy; apatite; basalts; Bradbury Landing; chain silicates; ChemCam; chemical composition; chromite; clinopyroxene; Curiosity Rover; diopside; feldspar group; ferrous iron; framework silicates; Gale Crater; germanium; igneous rocks; ilmenite; iron; iron oxides; landing sites; magnetite; manganese; mantle; Mars; Mars Science Laboratory; Martian meteorites; metals; metasomatism; meteorites; mineral composition; mugearite; nepheline; nepheline group; nesosilicates; olivine; olivine group; orthoclase; orthosilicates; oxides; partial melting; Peace Vallis; phosphates; plagioclase; planets; potassium; pyroxene group; rubidium; silicates; spectroscopy; stony meteorites; strontium; terrestrial planets; volatiles; volcanic rocks; X-ray analysis; X-ray spectroscopy; zinc DO - http://dx.doi.org/10.1002/2013JE004481 ER - TY - JOUR T1 - Igneous mineralogy at Bradbury Rise; the first ChemCam campaign at Gale Crater AN - 1553085232; 2014-064362 AB - Textural and compositional analyses using Chemistry Camera (ChemCam) remote microimager and laser-induced breakdown spectroscopy (LIBS) have been performed on five float rocks and coarse gravels along the first 100 m of the Curiosity traverse at Bradbury Rise. ChemCam, the first LIBS instrument sent to another planet, offers the opportunity to assess mineralogic diversity at grain-size scales ( approximately 100 mu m) and, from this, lithologic diversity. Depth profiling indicates that targets are relatively free of surface coatings. One type of igneous rock is volcanic and includes both aphanitic (Coronation) and porphyritic (Mara) samples. The porphyritic sample shows dark grains that are likely pyroxene megacrysts in a fine-grained mesostasis containing andesine needles. Both types have magnesium-poor basaltic compositions and in this respect are similar to the evolved Jake Matijevic rock analyzed further along the Curiosity traverse both with Alpha-Particle X-ray Spectrometer and ChemCam instruments. The second rock type encountered is a coarse-grained intrusive rock (Thor Lake) showing equigranular texture with millimeter size crystals of feldspars and Fe-Ti oxides. Such a rock is not unique at Gale as the surrounding coarse gravels (such as Beaulieu) and the conglomerate Link are dominated by feldspathic (andesine-bytownite) clasts. Finally, alkali feldspar compositions associated with a silica polymorph have been analyzed in fractured filling material of Preble rock and in Stark, a putative pumice or an impact melt. These observations document magmatic diversity at Gale and describe the first fragments of feldspar-rich lithologies (possibly an anorthosite) that may be ancient crust transported from the crater rim and now forming float rocks, coarse gravel, or conglomerate clasts. Abstract Copyright (2013), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Sautter, Violaine AU - Fabre, Cecile AU - Forni, Olivier AU - Toplis, M J AU - Cousin, Agnes AU - Ollila, Ann M AU - Meslin, Pierre-Yves AU - Maurice, Sylvestre AU - Wiens, Roger C AU - Baratoux, D AU - Gold, N AU - Le Mouelic, S AU - Gasnault, Olivier AU - Berger, G AU - Lasue, J AU - Anderson, R A AU - Lewin, Eric AU - Schmidt, M E AU - Dyar, D AU - Ehlmann, B L AU - Bridges, John C AU - Clark, B AU - Pinet, P Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 30 EP - 46 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 1 SN - 2169-9097, 2169-9097 KW - silicates KW - volcanic rocks KW - laser-induced breakdown spectroscopy KW - iron oxides KW - igneous rocks KW - techniques KW - Mars KW - landing sites KW - gravel KW - Bradbury Rise KW - Gale Crater KW - sedimentary rocks KW - plutonic rocks KW - mineral composition KW - major elements KW - Curiosity Rover KW - sediments KW - X-ray analysis KW - oxides KW - ChemCam KW - framework silicates KW - trace elements KW - chemical composition KW - plagioclase KW - clastic sediments KW - textures KW - grain size KW - clasts KW - conglomerate KW - bytownite KW - anorthosite KW - emission spectroscopy KW - andesine KW - terrestrial planets KW - pyroclastics KW - planets KW - titanium oxides KW - pumice KW - X-ray spectroscopy KW - spectroscopy KW - feldspar group KW - clastic rocks KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553085232?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Igneous+mineralogy+at+Bradbury+Rise%3B+the+first+ChemCam+campaign+at+Gale+Crater&rft.au=Sautter%2C+Violaine%3BFabre%2C+Cecile%3BForni%2C+Olivier%3BToplis%2C+M+J%3BCousin%2C+Agnes%3BOllila%2C+Ann+M%3BMeslin%2C+Pierre-Yves%3BMaurice%2C+Sylvestre%3BWiens%2C+Roger+C%3BBaratoux%2C+D%3BGold%2C+N%3BLe+Mouelic%2C+S%3BGasnault%2C+Olivier%3BBerger%2C+G%3BLasue%2C+J%3BAnderson%2C+R+A%3BLewin%2C+Eric%3BSchmidt%2C+M+E%3BDyar%2C+D%3BEhlmann%2C+B+L%3BBridges%2C+John+C%3BClark%2C+B%3BPinet%2C+P&rft.aulast=Sautter&rft.aufirst=Violaine&rft.date=2014-01-01&rft.volume=119&rft.issue=1&rft.spage=30&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004472 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 66 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - andesine; anorthosite; Bradbury Rise; bytownite; ChemCam; chemical composition; clastic rocks; clastic sediments; clasts; conglomerate; Curiosity Rover; emission spectroscopy; feldspar group; framework silicates; Gale Crater; grain size; gravel; igneous rocks; instruments; iron oxides; landing sites; laser-induced breakdown spectroscopy; major elements; Mars; mineral composition; oxides; plagioclase; planets; plutonic rocks; pumice; pyroclastics; sedimentary rocks; sediments; silicates; spectroscopy; techniques; terrestrial planets; textures; titanium oxides; trace elements; volcanic rocks; X-ray analysis; X-ray spectroscopy DO - http://dx.doi.org/10.1002/2013JE004472 ER - TY - JOUR T1 - Trace element geochemistry (Li, Ba, Sr, and Rb) using Curiosity's ChemCam; early results for Gale Crater from Bradbury landing site to Rocknest AN - 1553084508; 2014-064372 AB - The ChemCam instrument package on the Mars rover, Curiosity, provides new capabilities to probe the abundances of certain trace elements in the rocks and soils on Mars using the laser-induced breakdown spectroscopy technique. We focus on detecting and quantifying Li, Ba, Rb, and Sr in targets analyzed during the first 100 sols, from Bradbury Landing Site to Rocknest. Univariate peak area models and multivariate partial least squares models are presented. Li, detected for the first time directly on Mars, is generally low (100 ppm and >1000 ppm, respectively. These analysis locations tend to have high Si and alkali abundances, consistent with a feldspar composition. Together, these trace element observations provide possible evidence of magma differentiation and aqueous alteration. Abstract Copyright (2013), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Ollila, Ann M AU - Newsom, Horton E AU - Clark, Benton, III AU - Wiens, Roger C AU - Cousin, Agnes AU - Mangold, Nicolas AU - Sautter, Violaine AU - Maurice, Sylvestre AU - Clegg, Samuel M AU - Gasnault, Olivier AU - Forni, Olivier AU - Tokar, Robert AU - Lewin, Eric AU - Dyar, M Darby AU - Lasue, Jeremie AU - Anderson, Ryan AU - McLennan, Scott M AU - Bridges, John C AU - Vaniman, Dave AU - Lanza, Nina AU - Fabre, Cecile AU - Melikechi, Noureddine AU - Perrett, Glynis M AU - Campbell, John L AU - King, Penelope L AU - Barraclough, Bruce AU - Delapp, Dorothea AU - Johnstone, Stephen AU - Meslin, Pierre-Yves AU - Rosen-Gooding, Anya AU - Williams, Josh Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 255 EP - 285 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 1 SN - 2169-9097, 2169-9097 KW - magmatic differentiation KW - laser-induced breakdown spectroscopy KW - pebbles KW - Mars KW - Rocknest landing site KW - landing sites KW - Gale Crater KW - barium KW - Curiosity Rover KW - sediments KW - ChemCam KW - trace elements KW - Bathurst Inlet KW - sand KW - alkaline earth metals KW - chemical analysis KW - clastic sediments KW - lithium KW - Bradbury Landing KW - rubidium KW - alkali metals KW - trace-element analyses KW - emission spectroscopy KW - terrestrial planets KW - aqueous alteration KW - planets KW - metals KW - magmas KW - Mars Science Laboratory KW - spectroscopy KW - strontium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553084508?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Trace+element+geochemistry+%28Li%2C+Ba%2C+Sr%2C+and+Rb%29+using+Curiosity%27s+ChemCam%3B+early+results+for+Gale+Crater+from+Bradbury+landing+site+to+Rocknest&rft.au=Ollila%2C+Ann+M%3BNewsom%2C+Horton+E%3BClark%2C+Benton%2C+III%3BWiens%2C+Roger+C%3BCousin%2C+Agnes%3BMangold%2C+Nicolas%3BSautter%2C+Violaine%3BMaurice%2C+Sylvestre%3BClegg%2C+Samuel+M%3BGasnault%2C+Olivier%3BForni%2C+Olivier%3BTokar%2C+Robert%3BLewin%2C+Eric%3BDyar%2C+M+Darby%3BLasue%2C+Jeremie%3BAnderson%2C+Ryan%3BMcLennan%2C+Scott+M%3BBridges%2C+John+C%3BVaniman%2C+Dave%3BLanza%2C+Nina%3BFabre%2C+Cecile%3BMelikechi%2C+Noureddine%3BPerrett%2C+Glynis+M%3BCampbell%2C+John+L%3BKing%2C+Penelope+L%3BBarraclough%2C+Bruce%3BDelapp%2C+Dorothea%3BJohnstone%2C+Stephen%3BMeslin%2C+Pierre-Yves%3BRosen-Gooding%2C+Anya%3BWilliams%2C+Josh&rft.aulast=Ollila&rft.aufirst=Ann&rft.date=2014-01-01&rft.volume=119&rft.issue=1&rft.spage=255&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004517 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 140 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; aqueous alteration; barium; Bathurst Inlet; Bradbury Landing; ChemCam; chemical analysis; clastic sediments; Curiosity Rover; emission spectroscopy; Gale Crater; landing sites; laser-induced breakdown spectroscopy; lithium; magmas; magmatic differentiation; Mars; Mars Science Laboratory; metals; pebbles; planets; Rocknest landing site; rubidium; sand; sediments; spectroscopy; strontium; terrestrial planets; trace elements; trace-element analyses DO - http://dx.doi.org/10.1002/2013JE004517 ER - TY - JOUR T1 - A volume of fluid method based ghost fluid method for compressible multi-fluid flows AN - 1551093687; 19990691 AB - A ghost fluid method for compressible multi-fluid flows is presented in an adaptive mesh refinement (AMR) environment, where the volume of fluid method is used to track the interface. Various numerical examples are presented to compare the proposed method with interface capturing methods using pressure-temperature equilibrium and non-equilibrium temperature mixed cell approaches. It is found both mixing models are unable to generate accurate results for strong shock refractions through high acoustic impedance mismatch interfaces. The proposed method is found to be quite robust and can provide relatively reasonable results across a wide variety of flow regimes. The ghost fluid coupling between the fluid solver and the volume of fluid method is designed to be simple and consistent in any spatial dimension on AMR grid. JF - Computers & Fluids AU - Bo, Wurigen AU - Grove, John W AD - MS-784, Los Alamos National Lab, Los Alamos, NM 87544, United States, wbo@lanl.gov Y1 - 2014///0, PY - 2014 DA - 0, 2014 SP - 113 EP - 122 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 90 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Volume of fluid method KW - Ghost fluid method KW - Compressible multi-phase flows KW - Hydrological Regime KW - Impedance KW - Acoustics KW - Interfaces KW - Computers KW - Temperature KW - Refraction KW - Mixing KW - Model Studies KW - Methodology KW - Equilibrium KW - Acoustic impedance KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1551093687?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Fluids&rft.atitle=A+volume+of+fluid+method+based+ghost+fluid+method+for+compressible+multi-fluid+flows&rft.au=Bo%2C+Wurigen%3BGrove%2C+John+W&rft.aulast=Bo&rft.aufirst=Wurigen&rft.date=2014-01-01&rft.volume=90&rft.issue=&rft.spage=113&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/10.1016%2Fj.comfluid.2013.11.013 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Acoustic impedance; Refraction; Methodology; Hydrological Regime; Impedance; Equilibrium; Acoustics; Computers; Interfaces; Temperature; Mixing; Model Studies DO - http://dx.doi.org/10.1016/j.comfluid.2013.11.013 ER - TY - JOUR T1 - A three-dimensional finite element arbitrary Lagrangian-Eulerian method for shock hydrodynamics on unstructured grids AN - 1551063295; 20081347 AB - We present a three-dimensional (3D) finite element (FE) arbitrary Lagrangian-Eulerian (ALE) method for shock hydrodynamics on unstructured grids. The method is based on an FE Eulerian Godunov scheme for linear tetrahedra that has been extended to include mesh motion in an unsplit, flux-conservative formulation. The proposed method eliminates the splitting errors present in traditional Lagrange-plus-remap methods that occur during the remap phase. Unlike typical unsplit approaches, the mesh velocity is not determined by boundary motion but is instead based on the local fluid velocity. Smoothing operations are then applied to the mesh velocity to avoid mesh tangling. This approach allows the mesh to follow the fluid motion in a robust manner and leverage one of the primary advantages of Lagrangian schemes for shock hydrodynamics, namely that the resolution follows the flow. An approximate Riemann solver is used to calculate fluxes in the co-moving frame of the mesh. Results for a number of standard test problems are presented for 3D meshes of up to 10 super(7) tetrahedra. Global convergence rates of 0.8-1.0 are observed for shock dominated flows and 1.9 for smooth flows. We also demonstrate that the method satisfies the discrete geometric conservation law to truncation error, conserves total energy to machine precision, and preserves symmetry. JF - Computers & Fluids AU - Waltz, J AU - Morgan, N R AU - Canfield, T R AU - Charest, M RJ AU - Risinger, L D AU - Wohlbier, J G AD - Computational Physics Division, Los Alamos National Laboratory, Los Alamos, NM, United States, jwaltz@lanl.gov Y1 - 2014///0, PY - 2014 DA - 0, 2014 SP - 172 EP - 187 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 92 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Arbitrary Lagrangian-Eulerian KW - Shock hydrodynamics KW - Finite element method KW - Fluid motion KW - Hydrodynamics KW - Computers KW - Velocity KW - Errors KW - Methodology KW - Finite Element Method KW - Precision KW - Boundaries KW - Conservation KW - Standards KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1551063295?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Fluids&rft.atitle=A+three-dimensional+finite+element+arbitrary+Lagrangian-Eulerian+method+for+shock+hydrodynamics+on+unstructured+grids&rft.au=Waltz%2C+J%3BMorgan%2C+N+R%3BCanfield%2C+T+R%3BCharest%2C+M+RJ%3BRisinger%2C+L+D%3BWohlbier%2C+J+G&rft.aulast=Waltz&rft.aufirst=J&rft.date=2014-01-01&rft.volume=92&rft.issue=&rft.spage=172&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/10.1016%2Fj.compfluid.2013.12.021 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Fluid motion; Hydrodynamics; Methodology; Computers; Precision; Finite Element Method; Boundaries; Conservation; Velocity; Standards; Errors DO - http://dx.doi.org/10.1016/j.compfluid.2013.12.021 ER - TY - JOUR T1 - Fluid composition and mineral reactions at Yellowknife Bay, Mars AN - 1549618594; 2014-060218 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Bridges, J C AU - Schwenzer, S P AU - Leveille, R AU - Westall, F AU - Ollila, A M AU - Wiens, R AU - Mangold, N AU - Berger, G AU - McAdam, A C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1944 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - Yellowknife Bay KW - silicates KW - iron oxides KW - amorphous materials KW - olivine group KW - Mars KW - fluid phase KW - metasomatism KW - Sheepbed Mudstone KW - Gale Crater KW - terrestrial planets KW - nesosilicates KW - planets KW - diagenesis KW - olivine KW - brines KW - orthosilicates KW - oxides KW - water content KW - sheet silicates KW - hydrothermal alteration KW - mineral assemblages KW - pH KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549618594?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Fluid+composition+and+mineral+reactions+at+Yellowknife+Bay%2C+Mars&rft.au=Bridges%2C+J+C%3BSchwenzer%2C+S+P%3BLeveille%2C+R%3BWestall%2C+F%3BOllila%2C+A+M%3BWiens%2C+R%3BMangold%2C+N%3BBerger%2C+G%3BMcAdam%2C+A+C%3BAnonymous&rft.aulast=Bridges&rft.aufirst=J&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/1944.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 22 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Apr. 29, 2014 N1 - Last updated - 2014-07-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - amorphous materials; brines; diagenesis; fluid phase; Gale Crater; hydrothermal alteration; iron oxides; Mars; metasomatism; mineral assemblages; nesosilicates; olivine; olivine group; orthosilicates; oxides; pH; planets; Sheepbed Mudstone; sheet silicates; silicates; terrestrial planets; water content; Yellowknife Bay ER - TY - JOUR T1 - Sedimentology of Darwin waypoint from Curiosity observations AN - 1549618407; 2014-060116 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Williams, R M E AU - Sumner, D Y AU - Gupta, S AU - Grotzinger, J P AU - Rubin, D AU - Wiens, R C AU - Edgett, K S AU - Rice, M S AU - Edgar, L A AU - Lewis, K W AU - Minitti, M E AU - Schieber, J AU - Williford, K H AU - Blaney, D L AU - Yingst, R A AU - Malin, M C AU - Mangold, N AU - Cousin, A AU - Lasue, J AU - Anderson, R B AU - Schroeder, S AU - Gasnault, O AU - Fisk, M R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2401 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - imagery KW - sediment supply KW - sandstone KW - pebbles KW - Mars KW - Mastcam KW - sedimentary rocks KW - Curiosity Rover KW - Altar Mountain KW - sediments KW - bedload KW - clastic sediments KW - ephemeral streams KW - MAHLI KW - veins KW - Bardin Bluffs KW - Mars Hand Lens Imager KW - terrestrial planets KW - planets KW - Darwin outcrop KW - diagenesis KW - alluvial fans KW - fluvial features KW - streams KW - clastic rocks KW - facies KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549618407?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Sedimentology+of+Darwin+waypoint+from+Curiosity+observations&rft.au=Williams%2C+R+M+E%3BSumner%2C+D+Y%3BGupta%2C+S%3BGrotzinger%2C+J+P%3BRubin%2C+D%3BWiens%2C+R+C%3BEdgett%2C+K+S%3BRice%2C+M+S%3BEdgar%2C+L+A%3BLewis%2C+K+W%3BMinitti%2C+M+E%3BSchieber%2C+J%3BWilliford%2C+K+H%3BBlaney%2C+D+L%3BYingst%2C+R+A%3BMalin%2C+M+C%3BMangold%2C+N%3BCousin%2C+A%3BLasue%2C+J%3BAnderson%2C+R+B%3BSchroeder%2C+S%3BGasnault%2C+O%3BFisk%2C+M+R%3BAnonymous&rft.aulast=Williams&rft.aufirst=R+M&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/2401.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 4 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 1, 2014 N1 - Last updated - 2014-11-13 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alluvial fans; Altar Mountain; Bardin Bluffs; bedload; clastic rocks; clastic sediments; Curiosity Rover; Darwin outcrop; diagenesis; ephemeral streams; facies; fluvial features; imagery; MAHLI; Mars; Mars Hand Lens Imager; Mastcam; pebbles; planets; sandstone; sediment supply; sedimentary rocks; sediments; streams; terrestrial planets; veins ER - TY - JOUR T1 - Probabilistic parameterisation of the surface mass balance-elevation feedback in regional climate model simulations of the Greenland ice sheet AN - 1535201951; 2014-042041 AB - We present a new parameterisation that relates surface mass balance (SMB: the sum of surface accumulation and surface ablation) to changes in surface elevation of the Greenland ice sheet (GrIS) for the MAR (Modele Atmospherique Regional: Fettweis, 2007) regional climate model. The motivation is to dynamically adjust SMB as the GrIS evolves, allowing us to force ice sheet models with SMB simulated by MAR while incorporating the SMB-elevation feedback, without the substantial technical challenges of coupling ice sheet and climate models. This also allows us to assess the effect of elevation feedback uncertainty on the GrIS contribution to sea level, using multiple global climate and ice sheet models, without the need for additional, expensive MAR simulations. We estimate this relationship separately below and above the equilibrium line altitude (ELA, separating negative and positive SMB) and for regions north and south of 77 degrees N, from a set of MAR simulations in which we alter the ice sheet surface elevation. These give four "SMB lapse rates", gradients that relate SMB changes to elevation changes. We assess uncertainties within a Bayesian framework, estimating probability distributions for each gradient from which we present best estimates and credibility intervals (CI) that bound 95% of the probability. Below the ELA our gradient estimates are mostly positive, because SMB usually increases with elevation: 0.56 (95% CI: -0.22 to 1.33) kg m (super -3) a (super -1) for the north, and 1.91 (1.03 to 2.61) kg m (super -3) a (super -1) for the south. Above the ELA, the gradients are much smaller in magnitude: 0.09 (-0.03 to 0.23) kg m (super -3) a (super -1) in the north, and 0.07 (-0.07 to 0.59) kg m (super -3) a (super -1) in the south, because SMB can either increase or decrease in response to increased elevation. Our statistically founded approach allows us to make probabilistic assessments for the effect of elevation feedback uncertainty on sea level projections (Edwards et al., 2014). JF - The Cryosphere (Online) AU - Edwards, T L AU - Fettweis, X AU - Gagliardini, O AU - Gillet-Chaulet, F AU - Goelzer, H AU - Gregory, J M AU - Hoffman, M AU - Huybrechts, P AU - Payne, A J AU - Perego, M AU - Price, S AU - Quiquet, A AU - Ritz, C Y1 - 2014 PY - 2014 DA - 2014 SP - 181 EP - 194 PB - Copernicus on behalf of the European Geosciences Union, Katlenburg-Lindau VL - 8 IS - 1 KW - ablation KW - Bayesian analysis KW - Arctic region KW - elevation KW - statistical analysis KW - Greenland ice sheet KW - glaciers KW - atmospheric precipitation KW - simulation KW - ice sheets KW - climate change KW - models KW - feedback KW - Greenland KW - sea-level changes KW - equilibrium line altitude KW - mass balance KW - probability KW - latitude KW - glacial geology KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535201951?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Cryosphere+%28Online%29&rft.atitle=Probabilistic+parameterisation+of+the+surface+mass+balance-elevation+feedback+in+regional+climate+model+simulations+of+the+Greenland+ice+sheet&rft.au=Edwards%2C+T+L%3BFettweis%2C+X%3BGagliardini%2C+O%3BGillet-Chaulet%2C+F%3BGoelzer%2C+H%3BGregory%2C+J+M%3BHoffman%2C+M%3BHuybrechts%2C+P%3BPayne%2C+A+J%3BPerego%2C+M%3BPrice%2C+S%3BQuiquet%2C+A%3BRitz%2C+C&rft.aulast=Edwards&rft.aufirst=T&rft.date=2014-01-01&rft.volume=8&rft.issue=1&rft.spage=181&rft.isbn=&rft.btitle=&rft.title=The+Cryosphere+%28Online%29&rft.issn=1994-0424&rft_id=info:doi/10.5194%2Ftc-8-181-2014 L2 - http://www.the-cryosphere.net/volumes_and_issues.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 32 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-06-13 N1 - SubjectsTermNotLitGenreText - ablation; Arctic region; atmospheric precipitation; Bayesian analysis; climate change; elevation; equilibrium line altitude; feedback; glacial geology; glaciers; Greenland; Greenland ice sheet; ice sheets; latitude; mass balance; models; probability; sea-level changes; simulation; statistical analysis DO - http://dx.doi.org/10.5194/tc-8-181-2014 ER - TY - JOUR T1 - Effect of uncertainty in surface mass balance-elevation feedback on projections of the future sea level contribution of the Greenland ice sheet AN - 1535201900; 2014-042042 AB - We apply a new parameterisation of the Greenland ice sheet (GrIS) feedback between surface mass balance (SMB: the sum of surface accumulation and surface ablation) and surface elevation in the MAR regional climate model (Edwards et al., 2014) to projections of future climate change using five ice sheet models (ISMs). The MAR (Modele Atmospherique Regional: Fettweis, 2007) climate projections are for 2000-2199, forced by the ECHAM5 and HadCM3 global climate models (GCMs) under the SRES A1B emissions scenario. The additional sea level contribution due to the SMB-elevation feedback averaged over five ISM projections for ECHAM5 and three for HadCM3 is 4.3% (best estimate; 95% credibility interval 1.8-6.9%) at 2100, and 9.6% (best estimate; 95% credibility interval 3.6-16.0%) at 2200. In all results the elevation feedback is significantly positive, amplifying the GrIS sea level contribution relative to the MAR projections in which the ice sheet topography is fixed: the lower bounds of our 95% credibility intervals (CIs) for sea level contributions are larger than the "no feedback" case for all ISMs and GCMs. Our method is novel in sea level projections because we propagate three types of modelling uncertainty - GCM and ISM structural uncertainties, and elevation feedback parameterisation uncertainty - along the causal chain, from SRES scenario to sea level, within a coherent experimental design and statistical framework. The relative contributions to uncertainty depend on the timescale of interest. At 2100, the GCM uncertainty is largest, but by 2200 both the ISM and parameterisation uncertainties are larger. We also perform a perturbed parameter ensemble with one ISM to estimate the shape of the projected sea level probability distribution; our results indicate that the probability density is slightly skewed towards higher sea level contributions. JF - The Cryosphere (Online) AU - Edwards, T L AU - Fettweis, X AU - Gagliardini, O AU - Gillet-Chaulet, F AU - Goelzer, H AU - Gregory, J M AU - Hoffman, M AU - Huybrechts, P AU - Payne, A J AU - Perego, M AU - Price, S AU - Quiquet, A AU - Ritz, C Y1 - 2014 PY - 2014 DA - 2014 SP - 195 EP - 208 PB - Copernicus on behalf of the European Geosciences Union, Katlenburg-Lindau VL - 8 IS - 1 KW - general circulation models KW - ablation KW - Arctic region KW - elevation KW - statistical analysis KW - Greenland ice sheet KW - prediction KW - glaciers KW - atmospheric precipitation KW - ice sheets KW - climate change KW - boundary conditions KW - models KW - feedback KW - Greenland KW - sea-level changes KW - equilibrium line altitude KW - mass balance KW - runoff KW - probability KW - glacial geology KW - uncertainty KW - meltwater KW - 24:Quaternary geology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535201900?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Cryosphere+%28Online%29&rft.atitle=Effect+of+uncertainty+in+surface+mass+balance-elevation+feedback+on+projections+of+the+future+sea+level+contribution+of+the+Greenland+ice+sheet&rft.au=Edwards%2C+T+L%3BFettweis%2C+X%3BGagliardini%2C+O%3BGillet-Chaulet%2C+F%3BGoelzer%2C+H%3BGregory%2C+J+M%3BHoffman%2C+M%3BHuybrechts%2C+P%3BPayne%2C+A+J%3BPerego%2C+M%3BPrice%2C+S%3BQuiquet%2C+A%3BRitz%2C+C&rft.aulast=Edwards&rft.aufirst=T&rft.date=2014-01-01&rft.volume=8&rft.issue=1&rft.spage=195&rft.isbn=&rft.btitle=&rft.title=The+Cryosphere+%28Online%29&rft.issn=1994-0424&rft_id=info:doi/10.5194%2Ftc-8-195-2014 L2 - http://www.the-cryosphere.net/volumes_and_issues.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 49 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2014-06-13 N1 - SubjectsTermNotLitGenreText - ablation; Arctic region; atmospheric precipitation; boundary conditions; climate change; elevation; equilibrium line altitude; feedback; general circulation models; glacial geology; glaciers; Greenland; Greenland ice sheet; ice sheets; mass balance; meltwater; models; prediction; probability; runoff; sea-level changes; statistical analysis; uncertainty DO - http://dx.doi.org/10.5194/tc-8-195-2014 ER - TY - JOUR T1 - Differential expression of small RNAs from Burkholderia thailandensis in response to varying environmental and stress conditions AN - 1534846549; 19977823 AB - Background: Bacterial small RNAs (sRNAs) regulate gene expression by base-pairing with downstream target mRNAs to attenuate translation of mRNA into protein at the post-transcriptional level. In response to specific environmental changes, sRNAs can modulate the expression levels of target genes, thus enabling adaptation of cellular physiology. Results: We profiled sRNA expression in the Gram-negative bacteria Burkholderia thailandensis cultured under 54 distinct growth conditions using a Burkholderia-specific microarray that contains probe sets to all intergenic regions greater than 90 bases. We identified 38 novel sRNAs and performed experimental validation on five sRNAs that play a role in adaptation of Burkholderia to cell stressors. In particular, the trans-encoded BTH_s1 and s39 exhibited differential expression profiles dependent on growth phase and cell stimuli, such as antibiotics and serum. Furthermore, knockdown of the highly-expressed BTH_s39 by antisense transcripts reduced B. thailandensis cell growth and attenuated host immune response upon infection, indicating that BTH_s39 functions in bacterial metabolism and adaptation to the host. In addition, expression of cis-encoded BTH_s13 and s19 found in the 5' untranslated regions of their cognate genes correlated with tight regulation of gene transcript levels. This sRNA-mediated downregulation of gene expression may be a conserved mechanism of post-transcriptional gene dosage control. Conclusions: These studies provide a broad analysis of differential Burkholderia sRNA expression profiles and illustrate the complexity of bacterial gene regulation in response to different environmental stress conditions. JF - BMC Genomics AU - Stubben, Chris J AU - Micheva-Viteva, Sofiya N AU - Shou, Yulin AU - Buddenborg, Sarah K AU - Dunbar, John M AU - Hong-Geller, Elizabeth AD - Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA Y1 - 2014 PY - 2014 DA - 2014 SP - 385 PB - BioMed Central Ltd., Middlesex House London W1T 4LB United Kingdom VL - 15 IS - 1 SN - 1471-2164, 1471-2164 KW - Genetics Abstracts; Microbiology Abstracts B: Bacteriology KW - Small RNAs KW - Burkholderia KW - Microarray KW - Stress conditions KW - Bacterial adaptation KW - Gene expression KW - Translation KW - Adaptations KW - Lymphocytes B KW - Growth conditions KW - DNA probes KW - Transcription KW - Antibiotics KW - Infection KW - DNA microarrays KW - Burkholderia thailandensis KW - Antisense KW - Gram-negative bacteria KW - Gene regulation KW - Environmental changes KW - Gene dosage KW - Environmental stress KW - Immune response KW - Post-transcription KW - Metabolism KW - J 02350:Immunology KW - G 07770:Bacteria UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1534846549?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=BMC+Genomics&rft.atitle=Differential+expression+of+small+RNAs+from+Burkholderia+thailandensis+in+response+to+varying+environmental+and+stress+conditions&rft.au=Stubben%2C+Chris+J%3BMicheva-Viteva%2C+Sofiya+N%3BShou%2C+Yulin%3BBuddenborg%2C+Sarah+K%3BDunbar%2C+John+M%3BHong-Geller%2C+Elizabeth&rft.aulast=Stubben&rft.aufirst=Chris&rft.date=2014-01-01&rft.volume=15&rft.issue=1&rft.spage=385&rft.isbn=&rft.btitle=&rft.title=BMC+Genomics&rft.issn=14712164&rft_id=info:doi/10.1186%2F1471-2164-15-385 L2 - http://www.biomedcentral.com/1471-2164/15/385 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 42 N1 - Last updated - 2014-10-02 N1 - SubjectsTermNotLitGenreText - Translation; Adaptations; Growth conditions; Lymphocytes B; DNA probes; Transcription; Antibiotics; Infection; DNA microarrays; Gene expression; Antisense; Gene regulation; Gram-negative bacteria; Environmental changes; Gene dosage; Environmental stress; Immune response; Post-transcription; Metabolism; Burkholderia thailandensis; Burkholderia DO - http://dx.doi.org/10.1186/1471-2164-15-385 ER - TY - JOUR T1 - Comparative analyses of a putative Francisella conjugative element AN - 1534836791; 20078748 AB - A large circular plasmid detected in Francisellanovicida-like strain PA10-7858, designated pFNPA10, was sequenced completely and analyzed. This 41013-bp plasmid showed no homology to any of the previously sequenced Francisella plasmids and was 8-10 times larger in size than them. A total of 57 ORFs were identified within pFNPA10 and at least 9 of them encoded putative proteins with homology to different conjugal transfer proteins. The presence of iteron-like direct repeats and an ORF encoding a putative replication protein within pFNPA10 suggested that it replicated by the theta mode. Phylogenetic analyses indicated that pFNPA10 had no near neighbors in the databases and that it may have originated within an environmental Francisella lineage. Based on its features, pFNPA10 appears to be a novel extra-chromosomal genetic element within the genus Francisella. The suitability of pFNPA10 as a vector for transformation of species of Francisella by conjugation remains to be explored.Original Abstract: Un grand plasmide circulaire detecte au sein de la souche PA10-7858 d'une bacterie de type Francisella novicida, designee pFNPA10, a ete completement sequence et analyse. Ce plasmide de 41013 pb ne presente aucune homologie avec les plasmides sequences precedemment chez Francisella et il est 8 a 10 fois plus grand que ces derniers. Au total, 57 ORF ont ete identifies au sein de pFNPA10 et au moins 9 d'entre eux codent pour des proteines putatives qui presentent une homologie avec differentes proteines de transfert par conjugaison. La presence de repetitions directes, semblables a des iterons, et d'un ORF codant pour une possible proteine de replication au sein de pFNPA10 suggerent que ce plasmide est sujet a une replication de type theta. Les analyses phylogenetiques ont indique que pFNPA10 n'a pas de proches voisins au sein des bases de donnees et qu'il pourrait tirer son origine au sein d'un lignage environnemental du Francisella. Sur la base de ses caracteristiques, le pFNPA10 semble representer un nouvel element genetique extra-chromosomique au sein du genre Francisella. Il reste a explorer le potentiel d'utilisation du pFNPA10 comme vecteur de transformation des especes de Francisella par conjugaison. [Traduit par la Redaction] JF - Genome AU - Siddaramappa, Shivakumara AU - Challacombe, Jean F AU - Petersen, Jeannine M AU - Pillai, Segaran AU - Kuske, Cheryl R AD - Institute of Bioinformatics and Applied Biotechnology, Bengaluru 560100, India., kuske@lanl.gov Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 137 EP - 144 PB - NRC Research Press VL - 57 IS - 3 SN - 0831-2796, 0831-2796 KW - Microbiology Abstracts B: Bacteriology; Genetics Abstracts KW - Francisella KW - plasmid KW - conjugal transfer proteins KW - theta replication KW - plasmide KW - proteines de transfert par conjugaison KW - replication de type theta KW - Phylogeny KW - Transformation KW - Databases KW - Conjugation KW - Homology KW - Replication KW - Plasmids KW - Open reading frames KW - J 02310:Genetics & Taxonomy KW - G 07770:Bacteria UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1534836791?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Genome&rft.atitle=Comparative+analyses+of+a+putative+Francisella+conjugative+element&rft.au=Siddaramappa%2C+Shivakumara%3BChallacombe%2C+Jean+F%3BPetersen%2C+Jeannine+M%3BPillai%2C+Segaran%3BKuske%2C+Cheryl+R&rft.aulast=Siddaramappa&rft.aufirst=Shivakumara&rft.date=2014-01-01&rft.volume=57&rft.issue=3&rft.spage=137&rft.isbn=&rft.btitle=&rft.title=Genome&rft.issn=08312796&rft_id=info:doi/10.1139%2Fgen-2013-0231 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 38 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Transformation; Phylogeny; Databases; Conjugation; Homology; Replication; Plasmids; Open reading frames; Francisella DO - http://dx.doi.org/10.1139/gen-2013-0231 ER - TY - JOUR T1 - A thermal desorption study of the kinetics of uranium hydride decomposition AN - 1534825405; 19900660 AB - The decomposition of uranium hydride powder was studied using thermal desorption spectroscopy (TDS). In the TDS spectra, three distinct decomposition peaks were observed. However, only the high temperature peak was associated with an activation energy, calculated to be 43 kJ/mol H. This activation energy was used to construct outgassing diagrams that can be used to estimate the temperature and time dependence of UH sub(3) decomposition. Potential models for explaining the three decomposition peaks and, thus, the decomposition mechanism are also presented and compared with H desorption energies calculated from first principles. Additional experiments on [alpha]-U coupons containing UH sub(3) corrosion pits were also performed. In those samples in excess of 6 peaks are observed. It is shown that the first three hydrogen peaks are related to the decomposition of UH sub(3). JF - Journal of Nuclear Materials AU - Lillard, R S AU - Taylor, C D AU - Wermer, J R AU - Mara, N A AU - Cooley, J C AD - Department of Chemical and Biomolecular Engineering, University of Akron, Akron, OH 44325, United States; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States, lillard@uakron.edu Y1 - 2014 PY - 2014 DA - 2014 SP - 49 EP - 55 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 444 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Desorption KW - Energy KW - Uranium KW - Kinetics KW - High temperature KW - Radioactive materials KW - Corrosion KW - Temperature KW - Hydrogen KW - Spectroscopy KW - Decomposition KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1534825405?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=A+thermal+desorption+study+of+the+kinetics+of+uranium+hydride+decomposition&rft.au=Lillard%2C+R+S%3BTaylor%2C+C+D%3BWermer%2C+J+R%3BMara%2C+N+A%3BCooley%2C+J+C&rft.aulast=Lillard&rft.aufirst=R&rft.date=2014-01-01&rft.volume=444&rft.issue=1-3&rft.spage=49&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2013.09.032 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 15 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Desorption; High temperature; Kinetics; Uranium; Energy; Radioactive materials; Temperature; Corrosion; Hydrogen; Spectroscopy; Decomposition DO - http://dx.doi.org/10.1016/j.jnucmat.2013.09.032 ER - TY - JOUR T1 - Effect of composition on thermal conductivity of MgO-Nd sub(2)Zr sub(2)O sub(7) composites for inert matrix materials AN - 1534825391; 19900697 AB - Inert matrix fuels based on magnesium oxide (MgO) as the inert phase have been of historic interest due to its high thermal conductivity. Minor actinide-bearing phases possessing an A sub(2)B sub(2)O sub(7) pyrochlore structure are also believed to contain a range of favorable attributes, suggesting a possible pairing with MgO to yield a high performance inert matrix fuel. The thermal diffusivity. heat capacity, and thermal expansion of MgO-Nd sub(2)Zr sub(2)O sub(7) composites were measured from room temperature to 273 K, where the MgO phase content was varied from 40 to 70 volume percent. The thermal conductivity of each composition was calculated using these results and then compared to widely employed methods to approximate the thermal conductivity of composite materials based upon the properties of the constituent phases. Results suggest that use of either a rule of mixtures or geometric mean approximation for the thermal conductivity of composite systems such as this one would be subject to significant uncertainties when the constituent properties widely differ. A sigmoidal average of the upper and lower Hashin- Shtrikman bounds was found to be in good agreement with the thermal conductivity of the composites as determined experimentally. JF - Journal of Nuclear Materials AU - Nelson, A T AU - Giachino, M M AU - Nino, J C AU - McClellan, K J AD - Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, atnelson@lanl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 385 EP - 392 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 444 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Composite materials KW - Historical account KW - Thermal expansion KW - Thermal conductivity KW - Fuels KW - Nuclear fuels KW - Radioactive materials KW - Thermal diffusivity KW - Temperature KW - Magnesium KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1534825391?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Effect+of+composition+on+thermal+conductivity+of+MgO-Nd+sub%282%29Zr+sub%282%29O+sub%287%29+composites+for+inert+matrix+materials&rft.au=Nelson%2C+A+T%3BGiachino%2C+M+M%3BNino%2C+J+C%3BMcClellan%2C+K+J&rft.aulast=Nelson&rft.aufirst=A&rft.date=2014-01-01&rft.volume=444&rft.issue=1-3&rft.spage=385&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2013.10.033 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 25 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Historical account; Composite materials; Thermal expansion; Thermal conductivity; Fuels; Thermal diffusivity; Radioactive materials; Nuclear fuels; Temperature; Magnesium DO - http://dx.doi.org/10.1016/j.jnucmat.2013.10.033 ER - TY - JOUR T1 - Using physics-based priors in a Bayesian algorithm to enhance infrasound source location AN - 1529797138; 2014-037157 AB - We show improvements in the precision of the Bayesian infrasound source localization (BISL) method by incorporating semi-empirical model-based prior information. Given a set of backazimuths and delay times at > or =2 arrays, BISL scans a parameter space (that comprises the horizontal coordinates, celerity and origin time) for the most likely solution. A key element of BISL is its flexibility; the method allows the incorporation of prior information to constrain the parameters. Our research focuses on generating model-based propagation catalogues using a comprehensive set of atmospheric scenarios, extracting celerity distributions based on range and azimuth from the catalogues and using these distributions as prior probability density functions to enhance the location solution from BISL. To illustrate the improvements in source location precision, we compare the BISL results computed using uniform celerity distribution priors with those using enhanced priors; as applied to: (1) a set of events recorded across a regional network and (2) a large accidental chemical explosion recorded by six infrasound arrays in Eurasia. Finally, we discuss efforts to improve the numerical implementation of BISL by expanding the parameter space to cover a richer set of parameters that can include station-specific celerity distributions. JF - Geophysical Journal International AU - Marcillo, Omar AU - Arrowsmith, Stephen AU - Whitaker, Rod AU - Anderson, Dale AU - Nippress, Alexandra AU - Green, David N AU - Drob, Douglas Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 375 EP - 385 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 196 IS - 1 SN - 0956-540X, 0956-540X KW - guided waves KW - Bayesian analysis KW - statistical analysis KW - elastic waves KW - signals KW - models KW - ground truth KW - ray tracing KW - propagation KW - probability KW - seismic waves KW - algorithms KW - arrival time KW - acoustical waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529797138?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Using+physics-based+priors+in+a+Bayesian+algorithm+to+enhance+infrasound+source+location&rft.au=Marcillo%2C+Omar%3BArrowsmith%2C+Stephen%3BWhitaker%2C+Rod%3BAnderson%2C+Dale%3BNippress%2C+Alexandra%3BGreen%2C+David+N%3BDrob%2C+Douglas&rft.aulast=Marcillo&rft.aufirst=Omar&rft.date=2014-01-01&rft.volume=196&rft.issue=1&rft.spage=375&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggt353 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 37 N1 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2014-05-29 N1 - SubjectsTermNotLitGenreText - acoustical waves; algorithms; arrival time; Bayesian analysis; elastic waves; ground truth; guided waves; models; probability; propagation; ray tracing; seismic waves; signals; statistical analysis DO - http://dx.doi.org/10.1093/gji/ggt353 ER - TY - JOUR T1 - Mining locus tags in PubMed Central to improve microbial gene annotation AN - 1512336818; 19358322 AB - Background: The scientific literature contains millions of microbial gene identifiers within the full text and tables, but these annotations rarely get incorporated into public sequence databases. We propose to utilize the Open Access (OA) subset of PubMed Central (PMC) as a gene annotation database and have developed an R package called pmcXML to automatically mine and extract locus tags from full text, tables and supplements. Results: We mined locus tags from 1835 OA publications in ten microbial genomes and extracted tags mentioned in 30,891 sentences in main text and 20,489 rows in tables. We identified locus tag pairs marking the start and end of a region such as an operon or genomic island and expanded these ranges to add another 13,043 tags. We also searched for locus tags in supplementary tables and publications outside the OA subset in Burkholderia pseudomallei K96243 for comparison. There were 168 publications containing 48,470 locus tags and 83% of mentions were from supplementary materials and 9% from publications outside the OA subset. Conclusions: B. pseudomallei locus tags within the full text and tables of OA publications represent only a small fraction of the total mentions in the literature. For microbial genomes with very few functionally characterized proteins, the locus tags mentioned in supplementary tables and within ranges like genomic islands contain the majority of locus tags. Significantly, the functions in the R package provide access to additional resources in the OA subset that are not currently indexed or returned by searching PMC. JF - BMC Bioinformatics AU - Stubben, Chris J AU - Challacombe, Jean F AD - Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM, USA Y1 - 2014 PY - 2014 DA - 2014 SP - 43 PB - BioMed Central Ltd., Middlesex House London W1T 4LB United Kingdom VL - 15 IS - 1 SN - 1471-2105, 1471-2105 KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Biotechnology and Bioengineering Abstracts KW - Burkholderia pseudomallei KW - Genomes KW - Databases KW - Islands KW - Osteoarthritis KW - Language KW - genomics KW - Bioinformatics KW - Operons KW - W 30960:Bioinformatics & Computer Applications KW - A 01300:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1512336818?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=BMC+Bioinformatics&rft.atitle=Mining+locus+tags+in+PubMed+Central+to+improve+microbial+gene+annotation&rft.au=Stubben%2C+Chris+J%3BChallacombe%2C+Jean+F&rft.aulast=Stubben&rft.aufirst=Chris&rft.date=2014-01-01&rft.volume=15&rft.issue=1&rft.spage=43&rft.isbn=&rft.btitle=&rft.title=BMC+Bioinformatics&rft.issn=14712105&rft_id=info:doi/10.1186%2F1471-2105-15-43 L2 - http://www.biomedcentral.com/1471-2105/15/43 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Number of references - 32 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Genomes; Databases; Islands; Osteoarthritis; Language; Bioinformatics; genomics; Operons; Burkholderia pseudomallei DO - http://dx.doi.org/10.1186/1471-2105-15-43 ER - TY - JOUR T1 - How do trees die? A test of the hydraulic failure and carbon starvation hypotheses AN - 1492660326; 18923718 AB - Despite decades of research on plant drought tolerance, the physiological mechanisms by which trees succumb to drought are still under debate. We report results from an experiment designed to separate and test the current leading hypotheses of tree mortality. We show that pinon pine (Pinus edulis) trees can die of both hydraulic failure and carbon starvation, and that during drought, the loss of conductivity and carbohydrate reserves can also co-occur. Hydraulic constraints on plant carbohydrate use determined survival time: turgor loss in the phloem limited access to carbohydrate reserves, but hydraulic control of respiration prolonged survival. Our data also demonstrate that hydraulic failure may be associated with loss of adequate tissue carbohydrate content required for osmoregulation, which then promotes failure to maintain hydraulic integrity. This study describes results of the first test of the leading, but controversial, hypotheses regarding how trees die during drought. Our results show that all of the hypothesized mortality mechanisms can occur in trees of the same, relatively isohydric species, but both the progress of symptoms and survival time during drought may vary with individual trees even in similar environmental conditions. The mortality process seems to be controlled by hydraulic limitations on carbohydrate transport and utilization, which determines plant survival time. JF - Plant, Cell & Environment AU - Sevanto, Sanna AU - McDowell, Nate G AU - DICKMAN, LTURIN AU - Pangle, Robert AU - Pockman, William T AD - Earth and Environmental Sciences Division. Los Alamos National Laboratory Y1 - 2014/01// PY - 2014 DA - Jan 2014 SP - 153 EP - 161 PB - Wiley Subscription Services, Inc., 1105 N Market St Wilmington DE 19801 VL - 37 IS - 1 SN - 0140-7791, 0140-7791 KW - Aqualine Abstracts; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts KW - Testing Procedures KW - Hydraulics KW - Mortality KW - Trees KW - Conductivity KW - Survival KW - Drought KW - Carbon KW - Carbohydrates KW - AQ 00008:Effects of Pollution KW - SW 6010:Structures KW - M2 551.577:General Precipitation (551.577) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492660326?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Plant%2C+Cell+%26+Environment&rft.atitle=How+do+trees+die%3F+A+test+of+the+hydraulic+failure+and+carbon+starvation+hypotheses&rft.au=Sevanto%2C+Sanna%3BMcDowell%2C+Nate+G%3BDICKMAN%2C+LTURIN%3BPangle%2C+Robert%3BPockman%2C+William+T&rft.aulast=Sevanto&rft.aufirst=Sanna&rft.date=2014-01-01&rft.volume=37&rft.issue=1&rft.spage=153&rft.isbn=&rft.btitle=&rft.title=Plant%2C+Cell+%26+Environment&rft.issn=01407791&rft_id=info:doi/10.1111%2Fpce.12141 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2015-01-21 N1 - SubjectsTermNotLitGenreText - Drought; Testing Procedures; Mortality; Hydraulics; Carbon; Trees; Conductivity; Survival; Carbohydrates DO - http://dx.doi.org/10.1111/pce.12141 ER - TY - JOUR T1 - Chemical inhibition of prometastatic lysyl-tRNA synthetase-laminin receptor interaction. AN - 1469659929; 24212136 AB - Lysyl-tRNA synthetase (KRS), a protein synthesis enzyme in the cytosol, relocates to the plasma membrane after a laminin signal and stabilizes a 67-kDa laminin receptor (67LR) that is implicated in cancer metastasis; however, its potential as an antimetastatic therapeutic target has not been explored. We found that the small compound BC-K-YH16899, which binds KRS, impinged on the interaction of KRS with 67LR and suppressed metastasis in three different mouse models. The compound inhibited the KRS-67LR interaction in two ways. First, it directly blocked the association between KRS and 67LR. Second, it suppressed the dynamic movement of the N-terminal extension of KRS and reduced membrane localization of KRS. However, it did not affect the catalytic activity of KRS. Our results suggest that specific modulation of a cancer-related KRS-67LR interaction may offer a way to control metastasis while avoiding the toxicities associated with inhibition of the normal functions of KRS. JF - Nature chemical biology AU - Kim, Dae Gyu AU - Lee, Jin Young AU - Kwon, Nam Hoon AU - Fang, Pengfei AU - Zhang, Qian AU - Wang, Jing AU - Young, Nicolas L AU - Guo, Min AU - Cho, Hye Young AU - Mushtaq, Ameeq Ul AU - Jeon, Young Ho AU - Choi, Jin Woo AU - Han, Jung Min AU - Kang, Ho Woong AU - Joo, Jae Eun AU - Hur, Youn AU - Kang, Wonyoung AU - Yang, Heekyoung AU - Nam, Do-Hyun AU - Lee, Mi-Sook AU - Lee, Jung Weon AU - Kim, Eun-Sook AU - Moon, Aree AU - Kim, Kibom AU - Kim, Doyeun AU - Kang, Eun Joo AU - Moon, Youngji AU - Rhee, Kyung Hee AU - Han, Byung Woo AU - Yang, Jee Sun AU - Han, Gyoonhee AU - Yang, Won Suk AU - Lee, Cheolju AU - Wang, Ming-Wei AU - Kim, Sunghoon AD - 1] Medicinal Bioconvergence Research Center, Seoul National University, Seoul, Korea. [2] Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea. [3]. ; 1] Medicinal Bioconvergence Research Center, Seoul National University, Seoul, Korea. [2] Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea. ; Department of Cancer Biology, The Scripps Research Institute, Scripps Florida, Jupiter, Florida, USA. ; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, USA. ; Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, USA. ; College of Pharmacy, Korea University, Sejong, Korea. ; 1] Medicinal Bioconvergence Research Center, Seoul National University, Seoul, Korea. [2] Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA. ; Yuhan Research Institute, Yongin, Korea. ; Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. ; Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea. ; College of Pharmacy, Duksung Women's University, Seoul, Korea. ; Medicinal Bioconvergence Research Center, Seoul National University, Seoul, Korea. ; Translational Research Center for Protein Function Control, Department of Biotechnology and WCU Department of Biomedical Sciences, Yonsei University, Seoul, Korea. ; BRI, Korea Institute of Science and Technology, Seoul, Korea. ; The National Center for Drug Screening, Zhangjiang High-Tech Park, Shanghai, China. ; 1] Medicinal Bioconvergence Research Center, Seoul National University, Seoul, Korea. [2] Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea. [3] World Class University Department of Molecular Medicine and Biopharmaceutical Sciences, Seoul National University, Seoul, Korea. Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 29 EP - 34 VL - 10 IS - 1 KW - Receptors, Laminin KW - 0 KW - Lysine-tRNA Ligase KW - EC 6.1.1.6 KW - Index Medicus KW - Cell Membrane -- metabolism KW - Protein Transport KW - Lysine-tRNA Ligase -- metabolism KW - Lysine-tRNA Ligase -- antagonists & inhibitors KW - Receptors, Laminin -- antagonists & inhibitors KW - Neoplasm Metastasis KW - Receptors, Laminin -- metabolism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469659929?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+chemical+biology&rft.atitle=Chemical+inhibition+of+prometastatic+lysyl-tRNA+synthetase-laminin+receptor+interaction.&rft.au=Kim%2C+Dae+Gyu%3BLee%2C+Jin+Young%3BKwon%2C+Nam+Hoon%3BFang%2C+Pengfei%3BZhang%2C+Qian%3BWang%2C+Jing%3BYoung%2C+Nicolas+L%3BGuo%2C+Min%3BCho%2C+Hye+Young%3BMushtaq%2C+Ameeq+Ul%3BJeon%2C+Young+Ho%3BChoi%2C+Jin+Woo%3BHan%2C+Jung+Min%3BKang%2C+Ho+Woong%3BJoo%2C+Jae+Eun%3BHur%2C+Youn%3BKang%2C+Wonyoung%3BYang%2C+Heekyoung%3BNam%2C+Do-Hyun%3BLee%2C+Mi-Sook%3BLee%2C+Jung+Weon%3BKim%2C+Eun-Sook%3BMoon%2C+Aree%3BKim%2C+Kibom%3BKim%2C+Doyeun%3BKang%2C+Eun+Joo%3BMoon%2C+Youngji%3BRhee%2C+Kyung+Hee%3BHan%2C+Byung+Woo%3BYang%2C+Jee+Sun%3BHan%2C+Gyoonhee%3BYang%2C+Won+Suk%3BLee%2C+Cheolju%3BWang%2C+Ming-Wei%3BKim%2C+Sunghoon&rft.aulast=Kim&rft.aufirst=Dae&rft.date=2014-01-01&rft.volume=10&rft.issue=1&rft.spage=29&rft.isbn=&rft.btitle=&rft.title=Nature+chemical+biology&rft.issn=1552-4469&rft_id=info:doi/10.1038%2Fnchembio.1381 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-02-10 N1 - Date created - 2013-12-18 N1 - Date revised - 2017-02-17 N1 - Genetic sequence - 164194142; PubChem-Substance; 164194143; 164194146; 164194144; 164194145 N1 - SuppNotes - Cited By: Cancer Res. 2002 Jan 1;62(1):233-40 [11782383] Eur Surg Res. 2009;42(3):168-73 [19182490] Proc Natl Acad Sci U S A. 2002 Jun 11;99(12):7912-6 [12060739] J Biol Chem. 2003 Jun 20;278(25):22404-11 [12690120] FEBS Lett. 2004 May 7;565(1-3):181-7 [15135076] J Comput Chem. 2004 Oct;25(13):1605-12 [15264254] Cancer Res. 1992 Apr 15;52(8):2304-9 [1559233] J Natl Cancer Inst. 1993 Mar 3;85(5):398-402 [8433393] J Biomol NMR. 1995 Nov;6(3):277-93 [8520220] J Pathol. 1996 Aug;179(4):376-80 [8869283] Hum Pathol. 1996 Nov;27(11):1185-91 [8912829] Protein Sci. 1997 Oct;6(10):2203-17 [9336843] Clin Cancer Res. 1997 Feb;3(2):227-31 [9815677] Cancer Res. 1999 Feb 1;59(3):704-10 [9973221] Proc Natl Acad Sci U S A. 2005 May 3;102(18):6356-61 [15851690] Proteins. 2005 Jun 1;59(4):687-96 [15815974] Cancer Lett. 2005 Jun 1;223(1):1-10 [15890231] Endocr Relat Cancer. 2005 Jun;12(2):393-406 [15947111] Nat Med. 2006 Aug;12(8):895-904 [16892035] Nat Biotechnol. 2007 Jan;25(1):71-5 [17211405] Anal Biochem. 2007 Sep 1;368(1):111-21 [17603003] Q Rev Biophys. 2007 Aug;40(3):191-285 [18078545] Proc Natl Acad Sci U S A. 2008 Feb 19;105(7):2331-6 [18272479] Anal Chem. 2008 Dec 1;80(23):9034-41 [19551977] Nat Methods. 2009 Aug;6(8):606-12 [19620974] J Am Coll Radiol. 2009 Sep;6(9):606-8 [19720352] Biochemistry (Mosc). 2009 Jul;74(7):756-65 [19747096] J Comput Chem. 2009 Dec;30(16):2785-91 [19399780] Mol Ther. 2010 Jan;18(1):63-74 [19724263] Anal Chem. 2010 Feb 15;82(4):1450-4 [20099838] J Am Soc Mass Spectrom. 2010 Apr;21(4):550-8 [20116280] Nat Biotechnol. 2010 Apr;28(4):322-4 [20379172] Clin Oral Implants Res. 2010 May;21(5):550-7 [20443806] Drug Discov Today. 2010 Aug;15(15-16):656-67 [20685398] Curr Opin Lipidol. 2010 Dec;21(6):550-1 [21206344] Oncogene. 2011 Jan 6;30(1):54-64 [20818432] Braz Dent J. 2010;21(6):550-4 [21271047] Cereb Cortex. 2011 Mar;21(3):550-62 [20621984] Proc Natl Acad Sci U S A. 2011 May 17;108(20):8239-44 [21536907] J Cell Sci. 2011 Jul 1;124(Pt 13):2220-30 [21652634] Proc Natl Acad Sci U S A. 2011 Dec 6;108(49):19635-40 [22106287] J Mol Biol. 2012 May 25;419(1-2):102-9 [22391421] FASEB J. 2012 Oct;26(10):4142-59 [22751010] Mol Cell. 2013 Jan 10;49(1):30-42 [23159739] J Mol Biol. 2008 May 2;378(3):530-9 [18387633] Cancer Res. 2008 May 15;68(10):3915-23 [18483277] J Biol Chem. 2008 Oct 17;283(42):28321-8 [18715867] J Am Soc Mass Spectrom. 2009 Mar;20(3):520-4 [19095461] Braz J Med Biol Res. 2009 Feb;42(2):168-71 [19274344] Proc Natl Acad Sci U S A. 2002 Jan 8;99(1):178-83 [11773625] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/nchembio.1381 ER -