TY - JOUR T1 - Mass Spectrometric Characterization of an Acid-Labile Adduct Formed with 2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine and Albumin in Humans. AN - 1851287833; 27984695 AB - 2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) is a carcinogenic heterocyclic aromatic amine formed during the high-temperature cooking of meats. The cytochrome P450-mediated N-hydroxylation of the exocyclic amine group of PhIP produces 2-hydroxyamino-1-methyl-6-phenylimidazo[4,5-b]pyridine, an electrophilic metabolite that forms adducts with DNA and proteins. Previous studies conducted by our laboratory showed that the reaction of N-oxidized PhIP metabolites with human albumin in vitro primarily occurs at the Cys34 residue, to produce an acid-labile linked sulfinamide adduct. On the basis of these findings, we developed a sensitive ultraperformance liquid chromatography-mass spectrometry method to measure acid-labile albumin-PhIP adducts in human volunteers administered a dietary-relevant dose of 14C-labeled PhIP [Dingley, K. H., et al. (1999) Cancer Epidemiol., Biomarkers Prev. 8, 507-512]. Mild acid treatment of albumin (0.1 N HCl, 37 °C for 1 h) or proteolytic digestion with Pronase [50 mM ammonium bicarbonate buffer (pH 8.5) at 37 °C for 18 h] released similar amounts of covalently bound PhIP, which was characterized by multistage scanning and quantified by Orbitrap mass spectrometry. The amount of [14C]PhIP recovered by acid treatment of albumin 24 h following dosing accounted for 7.2-21.3% of the [14C]PhIP bound to albumin based on accelerator mass spectrometry measurements. 2-Amino-1-methyl-6-(5-hydroxy)phenylimidazo[4,5-b]pyridine, a hydrolysis product of the Cys34 S-N linked sulfenamide adduct of PhIP, was not detected in either acid-treated or protease-treated samples. These findings suggest that a portion of the PhIP bound to albumin in vivo probably occurs as an acid-labile sulfinamide adduct formed at the Cys34 residue. JF - Chemical research in toxicology AU - Wang, Yi AU - Villalta, Peter W AU - Peng, Lijuan AU - Dingley, Karen AU - Malfatti, Michael A AU - Turteltaub, K W AU - Turesky, Robert J AD - School of Food Science and Engineering, Wuhan Polytechnic University , ChangQing Garden, Hankou, Wuhan 430023, P. R. China. ; Biosciences and Biotechnology Division, Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory , Livermore, California 94550, United States. Y1 - 2017/02/20/ PY - 2017 DA - 2017 Feb 20 SP - 705 EP - 714 VL - 30 IS - 2 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1851287833?accountid=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+research+in+toxicology&rft.atitle=Mass+Spectrometric+Characterization+of+an+Acid-Labile+Adduct+Formed+with+2-Amino-1-methyl-6-phenylimidazo%5B4%2C5-b%5Dpyridine+and+Albumin+in+Humans.&rft.au=Wang%2C+Yi%3BVillalta%2C+Peter+W%3BPeng%2C+Lijuan%3BDingley%2C+Karen%3BMalfatti%2C+Michael+A%3BTurteltaub%2C+K+W%3BTuresky%2C+Robert+J&rft.aulast=Wang&rft.aufirst=Yi&rft.date=2017-02-20&rft.volume=30&rft.issue=2&rft.spage=705&rft.isbn=&rft.btitle=&rft.title=Chemical+research+in+toxicology&rft.issn=1520-5010&rft_id=info:doi/10.1021%2Facs.chemrestox.6b00426 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-12-16 N1 - Date revised - 2017-02-22 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1021/acs.chemrestox.6b00426 ER - TY - JOUR T1 - Sub-ice-shelf sediments record history of twentieth-century retreat of Pine Island Glacier AN - 1863566553; 2017-008903 JF - Nature (London) AU - Smith, J A AU - Andersen, T J AU - Shortt, M AU - Gaffney, A M AU - Stanton, T P AU - Bindschadler, R AU - Dutrieux, P AU - Jenkins, A AU - Hillenbrand, C D AU - Ehrmann, W AU - Corr, Hugh F J AU - Farley, N AU - Crowhurst, S AU - Vaughan, D G Y1 - 2017/01/05/ PY - 2017 DA - 2017 Jan 05 SP - 77 EP - 80 PB - Macmillan Journals, London VL - 541 IS - 7635 SN - 0028-0836, 0028-0836 KW - subglacial environment KW - Quaternary KW - glaciers KW - global change KW - Holocene KW - cores KW - Cenozoic KW - Antarctic ice sheet KW - sea-level changes KW - transgression KW - Antarctica KW - mass balance KW - West Antarctic ice sheet KW - sediments KW - thickness KW - reconstruction KW - Amundsen Sea KW - upper Holocene KW - Pine Island Glacier KW - global warming KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1863566553?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sub-ice-shelf+sediments+record+history+of+twentieth-century+retreat+of+Pine+Island+Glacier&rft.au=Smith%2C+J+A%3BAndersen%2C+T+J%3BShortt%2C+M%3BGaffney%2C+A+M%3BStanton%2C+T+P%3BBindschadler%2C+R%3BDutrieux%2C+P%3BJenkins%2C+A%3BHillenbrand%2C+C+D%3BEhrmann%2C+W%3BCorr%2C+Hugh+F+J%3BFarley%2C+N%3BCrowhurst%2C+S%3BVaughan%2C+D+G&rft.aulast=Smith&rft.aufirst=J&rft.date=2017-01-05&rft.volume=541&rft.issue=7635&rft.spage=77&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature20136 L2 - http://www.nature.com/nature/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - Number of references - 30 N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2017-02-02 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - Amundsen Sea; Antarctic ice sheet; Antarctica; Cenozoic; cores; glaciers; global change; global warming; Holocene; mass balance; Pine Island Glacier; Quaternary; reconstruction; sea-level changes; sediments; subglacial environment; thickness; transgression; upper Holocene; West Antarctic ice sheet DO - http://dx.doi.org/10.1038/nature20136 ER - TY - JOUR T1 - Identification of a U/Zn/Cu responsive global regulatory two-component system in Caulobacter crescentus. AN - 1854614284; 28035693 AB - Despite the well-known toxicity of uranium (U) to bacteria, little is known about how cells sense and respond to U. The recent finding of a U-specific stress response in Caulobacter crescentus has provided a foundation for studying the mechanisms of U- perception in bacteria. To gain insight into this process, we used a forward genetic screen to identify the regulatory components governing expression of the urcA promoter (PurcA ) that is strongly induced by U. This approach unearthed a previously uncharacterized two-component system, named UzcRS, which is responsible for U-dependent activation of PurcA . UzcRS is also highly responsive to zinc and copper, revealing a broader specificity than previously thought. Using ChIP-seq, we found that UzcR binds extensively throughout the genome in a metal-dependent manner and recognizes a noncanonical DNA-binding site. Coupling the genome-wide occupancy data with RNA-seq analysis revealed that UzcR is a global regulator of transcription, predominately activating genes encoding proteins that are localized to the cell envelope; these include metallopeptidases, multidrug-resistant efflux (MDR) pumps, TonB-dependent receptors and many proteins of unknown function. Collectively, our data suggest that UzcRS couples the perception of U, Zn and Cu with a novel extracytoplasmic stress response. JF - Molecular microbiology AU - Park, Dan M AU - Overton, K Wesley AU - Liou, Megan J AU - Jiao, Yongqin AD - Biosciences and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, USA. Y1 - 2016/12/30/ PY - 2016 DA - 2016 Dec 30 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1854614284?accountid=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+microbiology&rft.atitle=Identification+of+a+U%2FZn%2FCu+responsive+global+regulatory+two-component+system+in+Caulobacter+crescentus.&rft.au=Park%2C+Dan+M%3BOverton%2C+K+Wesley%3BLiou%2C+Megan+J%3BJiao%2C+Yongqin&rft.aulast=Park&rft.aufirst=Dan&rft.date=2016-12-30&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Molecular+microbiology&rft.issn=1365-2958&rft_id=info:doi/10.1111%2Fmmi.13615 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-12-30 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1111/mmi.13615 ER - TY - JOUR T1 - Real-Time Imaging of Self-Organization and Mechanical Competition in Carbon Nanotube Forest Growth. AN - 1852673808; 27959511 AB - The properties of carbon nanotube (CNT) networks and analogous materials comprising filamentary nanostructures are governed by the intrinsic filament properties and their hierarchical organization and interconnection. As a result, direct knowledge of the collective dynamics of CNT synthesis and self-organization is essential to engineering improved CNT materials for applications such as membranes and thermal interfaces. Here, we use real-time environmental transmission electron microscopy (E-TEM) to observe nucleation and self-organization of CNTs into vertically aligned forests. Upon introduction of the carbon source, we observe a large scatter in the onset of nucleation of individual CNTs and the ensuing growth rates. Experiments performed at different temperatures and catalyst particle densities show the critical role of CNT density on the dynamics of self-organization; low-density CNT nucleation results in the CNTs becoming pinned to the substrate and forming random networks, whereas higher density CNT nucleation results in self-organization of the CNTs into bundles that are oriented perpendicular to the substrate. We also find that mechanical coupling between growing CNTs alters their growth trajectory and shape, causing significant deformations, buckling, and defects in the CNT walls. Therefore, it appears that CNT-CNT coupling not only is critical for self-organization but also directly influences CNT quality and likely the resulting properties of the forest. Our findings show that control of the time-distributed kinetics of CNT nucleation and bundle formation are critical to manufacturing well-organized CNT assemblies and that E-TEM can be a powerful tool to investigate the mesoscale dynamics of CNT networks. JF - ACS nano AU - Balakrishnan, Viswanath AU - Bedewy, Mostafa AU - Meshot, Eric R AU - Pattinson, Sebastian W AU - Polsen, Erik S AU - Laye, Fabrice AU - Zakharov, Dmitri N AU - Stach, Eric A AU - Hart, A John AD - Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States. ; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory , Livermore, California 94550, United States. ; Department of Mechanical Engineering, University of Michigan , 2350 Hayward Street, Ann Arbor, Michigan 48109, United States. ; Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States. Y1 - 2016/12/27/ PY - 2016 DA - 2016 Dec 27 SP - 11496 EP - 11504 VL - 10 IS - 12 KW - carbon nanotubes KW - self-organization KW - chemical vapor deposition KW - forces KW - electron microscopy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1852673808?accountid=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=Real-Time+Imaging+of+Self-Organization+and+Mechanical+Competition+in+Carbon+Nanotube+Forest+Growth.&rft.au=Balakrishnan%2C+Viswanath%3BBedewy%2C+Mostafa%3BMeshot%2C+Eric+R%3BPattinson%2C+Sebastian+W%3BPolsen%2C+Erik+S%3BLaye%2C+Fabrice%3BZakharov%2C+Dmitri+N%3BStach%2C+Eric+A%3BHart%2C+A+John&rft.aulast=Balakrishnan&rft.aufirst=Viswanath&rft.date=2016-12-27&rft.volume=10&rft.issue=12&rft.spage=11496&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Facsnano.6b07251 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-12-13 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsnano.6b07251 ER - TY - JOUR T1 - Tracing the source of soil organic matter eroded from temperate forest catchments using carbon and nitrogen isotopes AN - 1861095461; 786737-15 AB - Soil erosion continuously redistributes soil and associated soil organic matter (SOM) on the Earth's surface, with important implications for biogeochemical cycling of essential elements and terrestrial carbon sequestration. Despite the importance of soil erosion, surprisingly few studies have evaluated the sources of eroded carbon (C). We used natural abundance levels of the stable and radioactive isotopes of C ( (super 13) C and (super 14) C) and stable isotope of nitrogen ( (super 15) N) to elucidate the origins of SOM eroded from low-order catchments along the western slopes of the Sierra Nevada of California, USA. Our work was conducted in two relatively undisturbed catchments (low elevation = 1800 m, and high elevation = 2300 m) of the Kings River Experimental Watersheds (KREW) in the Sierra National Forest. Sediment captured in basins at the outlet of each gauged watershed were compared to possible source materials, which included: upland surficial organic horizons (i.e., forest floor) and mineral soils (0-0.6 m) from three landform positions (i.e., crest, backslope, and toeslope), stream bank soils (0-0.6 m), and stream-bed materials (0-0.05 m). We found that most of the organic matter (OM) in the captured sediments was composed of O-horizon material that had high C concentrations. Radiocarbon analyses also showed that the captured OM is composed of modern (post-1950) C, with fraction modern values at or above 1.0. Our results suggest that surface (sheet) erosion, as opposed to channeling through established streams and episodic mass wasting events, is likely the largest source of sediment exported out of these minimally disturbed, headwater catchments. The erosional export of sediment with a high concentration of C, especially in the form of relatively undecomposed litter from the O horizon, suggests that a large fraction of the exported C is likely to be decomposed during or after erosion; hence, it is unlikely that soil erosion acts as a significant net sink for atmospheric CO (sub 2) in these low-order, temperate forest catchments. JF - Chemical Geology AU - McCorkle, Emma P AU - Berhe, Asmeret Asefaw AU - Hunsaker, Carolyn T AU - Johnson, Dale W AU - McFarlane, Karis J AU - Fogel, Marilyn L AU - Hart, Stephen C Y1 - 2016/12/16/ PY - 2016 DA - 2016 Dec 16 SP - 172 EP - 184 PB - Elsevier, Amsterdam VL - 445 SN - 0009-2541, 0009-2541 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861095461?accountid=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=Chemical+Geology&rft.atitle=Tracing+the+source+of+soil+organic+matter+eroded+from+temperate+forest+catchments+using+carbon+and+nitrogen+isotopes&rft.au=McCorkle%2C+Emma+P%3BBerhe%2C+Asmeret+Asefaw%3BHunsaker%2C+Carolyn+T%3BJohnson%2C+Dale+W%3BMcFarlane%2C+Karis+J%3BFogel%2C+Marilyn+L%3BHart%2C+Stephen+C&rft.aulast=McCorkle&rft.aufirst=Emma&rft.date=2016-12-16&rft.volume=445&rft.issue=&rft.spage=172&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2016.04.025 L2 - http://www.sciencedirect.com/science/journal/00092541 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 - CODEN - CHGEAD DO - http://dx.doi.org/10.1016/j.chemgeo.2016.04.025 ER - TY - JOUR T1 - Glacial water mass structure and rapid delta (super 18) O and delta (super 13) C changes during the last glacial termination in the Southwest Pacific AN - 1861077244; 786144-9 AB - Changes in ocean circulation are thought to have contributed to lowering glacial atmospheric CO (sub 2) levels by enhancing deep ocean sequestration of carbon that was returned to the atmosphere during glacial terminations. High-resolution benthic foraminiferal delta (super 13) C and delta (super 18) O records from a depth transect of cores in the Southwest Pacific Ocean presented here provide evidence that both wind- and thermohaline-driven circulation drove CO (sub 2) from the ocean during the last deglaciation. Shallow geochemical stratification in the glacial Southern Ocean was followed by a short pulse of rapid delta (super 13) C enrichment to intermediate water depths during Heinrich Stadial 1, indicative of better-ventilated intermediate waters co-occurring with documented wind-driven upwelling in the Southern Ocean. Intermediate depth delta (super 13) C enrichment paused at the start of the Antarctic Cold Reversal ( approximately 14.7 ka), implying a brief shallow restratification, while deeper layers were progressively flushed of delta (super 13) C-depleted and delta (super 18) O-enriched waters, likely caused by the increasing influence of deep waters sourced from the North Atlantic. The coincidence of atmospheric CO (sub 2) increases with these geochemical shifts in both shallow and deep cores suggests that shifts in both atmospheric and oceanic circulation contributed to the deglacial rise of CO (sub 2) . JF - Earth and Planetary Science Letters AU - Sikes, Elisabeth L AU - Elmore, Aurora C AU - Allen, Katherine A AU - Cook, Mea S AU - Guilderson, Thomas P Y1 - 2016/12/15/ PY - 2016 DA - 2016 Dec 15 SP - 87 EP - 97 PB - Elsevier, Amsterdam VL - 456 SN - 0012-821X, 0012-821X KW - upwelling KW - Antarctic Cold Reversal KW - benthic taxa KW - oxygen KW - Southwest Pacific KW - isotopes KW - paleo-oceanography KW - Holocene KW - stable isotopes KW - deglaciation KW - cores KW - West Pacific KW - carbon dioxide KW - ventilation KW - upper Pleistocene KW - Foraminifera KW - Cenozoic KW - upper Weichselian KW - Weichselian KW - transport KW - carbon KW - Invertebrata KW - Younger Dryas KW - ocean circulation KW - Protista KW - Quaternary KW - isotope ratios KW - C-13/C-12 KW - Antarctic Ocean KW - South Pacific KW - O-18/O-16 KW - depth KW - thermohaline circulation KW - stratification KW - Pacific Ocean KW - Atlantic Meridional Overturning Circulation KW - Pleistocene KW - wind transport KW - microfossils KW - 24:Quaternary geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861077244?accountid=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+and+Planetary+Science+Letters&rft.atitle=Glacial+water+mass+structure+and+rapid+delta+%28super+18%29+O+and+delta+%28super+13%29+C+changes+during+the+last+glacial+termination+in+the+Southwest+Pacific&rft.au=Sikes%2C+Elisabeth+L%3BElmore%2C+Aurora+C%3BAllen%2C+Katherine+A%3BCook%2C+Mea+S%3BGuilderson%2C+Thomas+P&rft.aulast=Sikes&rft.aufirst=Elisabeth&rft.date=2016-12-15&rft.volume=456&rft.issue=&rft.spage=87&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2016.09.043 L2 - http://www.sciencedirect.com/science/journal/0012821X 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 - 84 N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Includes appendix N1 - Last updated - 2017-01-24 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - Antarctic Cold Reversal; Antarctic Ocean; Atlantic Meridional Overturning Circulation; benthic taxa; C-13/C-12; carbon; carbon dioxide; Cenozoic; cores; deglaciation; depth; Foraminifera; Holocene; Invertebrata; isotope ratios; isotopes; microfossils; O-18/O-16; ocean circulation; oxygen; Pacific Ocean; paleo-oceanography; Pleistocene; Protista; Quaternary; South Pacific; Southwest Pacific; stable isotopes; stratification; thermohaline circulation; transport; upper Pleistocene; upper Weichselian; upwelling; ventilation; Weichselian; West Pacific; wind transport; Younger Dryas DO - http://dx.doi.org/10.1016/j.epsl.2016.09.043 ER - TY - JOUR T1 - Moment Tensor Analysis of Very Shallow Sources AN - 1850777676; PQ0003933395 AB - An issue for moment tensor (MT) inversion of shallow seismic sources is that some components of the Green's functions have vanishing amplitudes at the free surface, which can result in bias in the MT solution. The effects of the free surface on the stability of the MT method become important as we continue to investigate and improve the capabilities of regional full MT inversion for source-type identification and discrimination. It is important to understand free-surface effects on discriminating shallow explosive sources for nuclear monitoring purposes. It may also be important in natural systems that have very shallow seismicity, such as volcanic and geothermal systems. We examine the effects of the free surface on the MT via synthetic testing and apply the MT-based discrimination method to three quarry blasts from the HUMMING ALBATROSS experiment. These shallow chemical explosions at similar to 10 m depth and recorded up to several kilometers distance represent rather severe source-station geometry in terms of free-surface effects. We show that the method is capable of recovering a predominantly explosive source mechanism, and the combined waveform and first-motion method enables the unique discrimination of these events. Recovering the design yield using seismic moment estimates from MT inversion remains challenging, but we can begin to put error bounds on our moment estimates using the network sensitivity solution technique (Ford et al., 2010).Online Material: Figures showing synthetic tests for a pure explosion and a composite source at local distances and table of moment tensor components. JF - Bulletin of the Seismological Society of America. Berkeley CA AU - Chiang, Andrea AU - Dreger, Douglas S AU - Ford, Sean R AU - Walter, William R AU - Yoo, Seung-Hoon AD - Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, chiang4@llnl.gov Y1 - 2016/12/11/ PY - 2016 DA - 2016 Dec 11 SP - 2436 EP - 2449 PB - Seismological Society of America VL - 106 IS - 6 SN - 0037-1106, 0037-1106 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Marine KW - Sensitivity KW - Marine birds KW - Quarrying KW - Volcanoes KW - Inversions KW - Explosions KW - Methodology KW - Green's function KW - Inversion KW - Explosives KW - Q2 09270:Seismology KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1850777676?accountid=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=Bulletin+of+the+Seismological+Society+of+America.+Berkeley+CA&rft.atitle=Moment+Tensor+Analysis+of+Very+Shallow+Sources&rft.au=Chiang%2C+Andrea%3BDreger%2C+Douglas+S%3BFord%2C+Sean+R%3BWalter%2C+William+R%3BYoo%2C+Seung-Hoon&rft.aulast=Chiang&rft.aufirst=Andrea&rft.date=2016-12-11&rft.volume=106&rft.issue=6&rft.spage=2436&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America.+Berkeley+CA&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150233 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Green's function; Marine birds; Explosions; Inversions; Methodology; Sensitivity; Quarrying; Inversion; Volcanoes; Explosives; Marine DO - http://dx.doi.org/10.1785/0120150233 ER - TY - JOUR T1 - A persistent and dynamic East Greenland ice sheet over the past 7.5 million years AN - 1863567882; 2017-007749 JF - Nature (London) AU - Bierman, Paul R AU - Shakun, Jeremy D AU - Corbett, Lee B AU - Zimmerman, Susan R AU - Rood, Dylan H Y1 - 2016/12/08/ PY - 2016 DA - 2016 Dec 08 SP - 256 EP - 260 PB - Macmillan Journals, London VL - 540 IS - 7632 SN - 0028-0836, 0028-0836 KW - relative age KW - ODP Site 918 KW - glacial extent KW - isotopes KW - Leg 162 KW - Greenland ice sheet KW - Norwegian Sea KW - GISP2 KW - paleoclimatology KW - deglaciation KW - Cenozoic KW - Greenland KW - Al-26 KW - radioactive isotopes KW - geochronology KW - dynamics KW - aluminum KW - Arctic Ocean KW - ODP Site 987 KW - alkaline earth metals KW - Leg 152 KW - Quaternary KW - Be-10 KW - Arctic region KW - East Greenland ice sheet KW - Miocene KW - Tertiary KW - paleoenvironment KW - Irminger Basin KW - Neogene KW - metals KW - Pliocene KW - reconstruction KW - Ocean Drilling Program KW - North Atlantic KW - East Greenland KW - beryllium KW - Atlantic Ocean KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1863567882?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+persistent+and+dynamic+East+Greenland+ice+sheet+over+the+past+7.5+million+years&rft.au=Bierman%2C+Paul+R%3BShakun%2C+Jeremy+D%3BCorbett%2C+Lee+B%3BZimmerman%2C+Susan+R%3BRood%2C+Dylan+H&rft.aulast=Bierman&rft.aufirst=Paul&rft.date=2016-12-08&rft.volume=540&rft.issue=7632&rft.spage=256&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature20147 L2 - http://www.nature.com/nature/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - Number of references - 29 N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2017-02-02 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - Al-26; alkaline earth metals; aluminum; Arctic Ocean; Arctic region; Atlantic Ocean; Be-10; beryllium; Cenozoic; deglaciation; dynamics; East Greenland; East Greenland ice sheet; geochronology; GISP2; glacial extent; Greenland; Greenland ice sheet; Irminger Basin; isotopes; Leg 152; Leg 162; metals; Miocene; Neogene; North Atlantic; Norwegian Sea; Ocean Drilling Program; ODP Site 918; ODP Site 987; paleoclimatology; paleoenvironment; Pliocene; Quaternary; radioactive isotopes; reconstruction; relative age; Tertiary DO - http://dx.doi.org/10.1038/nature20147 ER - TY - JOUR T1 - Nitrate vulnerability projections from Bayesian inference of multiple ground water age tracers AN - 1873351285; 2017-015796 AB - Nitrate is a major source of contamination of groundwater in the United States and around the world. We tested the applicability of multiple groundwater age tracers ( (super 3) H, (super 3) He, (super 4) He, (super 14) C, (super 13) C, and (super 85) Kr) in projecting future trends of nitrate concentration in 9 long-screened, public drinking water wells in Turlock, California, where nitrate concentrations are increasing toward the regulatory limit. Very low (super 85) Kr concentrations and apparent (super 3) H/ (super 3) He ages point to a relatively old modern fraction (40-50 years), diluted with pre-modern groundwater, corroborated by the onset and slope of increasing nitrate concentrations. An inverse Gaussian-Dirac model was chosen to represent the age distribution of the sampled groundwater at each well. Model parameters were estimated using a Bayesian inference, resulting in the posterior probability distribution - including the associated uncertainty - of the parameters and projected nitrate concentrations. Three scenarios were considered, including combined historic nitrate and age tracer data, the sole use of nitrate and the sole use of age tracer data. Each scenario was evaluated based on the ability of the model to reproduce the data and the level of reliability of the nitrate projections. The tracer-only scenario closely reproduced tracer concentrations, but not observed trends in the nitrate concentration. Both cases that included nitrate data resulted in good agreement with historical nitrate trends. Use of combined tracers and nitrate data resulted in a narrower range of projections of future nitrate levels. However, use of combined tracer and nitrate resulted in a larger discrepancy between modeled and measured tracers for some of the tracers. Despite nitrate trend slopes between 0.56 and 1.73 mg/L/year in 7 of the 9 wells, the probability that concentrations will increase to levels above the MCL by 2040 are over 95% for only two of the wells, and below 15% in the other wells, due to a leveling off of reconstructed historical nitrate loadings to groundwater since about 1990. JF - Journal of Hydrology AU - Alikhani, Jamal AU - Deinhart, Amanda Lee AU - Visser, Ate AU - Bibby, Richard K AU - Purtschert, Roland AU - Moran, Jean E AU - Massoudieh, Arash AU - Esser, Bradley K Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 167 EP - 181 PB - Elsevier, Amsterdam VL - 543 IS - Part A SN - 0022-1694, 0022-1694 KW - United States KW - isotopes KW - Bayesian analysis KW - mass spectra KW - tritium KW - Holocene KW - environmental analysis KW - Cenozoic KW - California KW - Kr-85 KW - Gaussian-Dirac model KW - radioactive isotopes KW - dates KW - noble gases KW - carbon KW - absolute age KW - helium KW - Turlock California KW - spectra KW - Stanislaus County California KW - water pollution KW - Quaternary KW - pollutants KW - statistical analysis KW - pollution KW - nitrates KW - krypton KW - models KW - hydrogen KW - residence time KW - mathematical methods KW - C-14 KW - upper Holocene KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873351285?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Nitrate+vulnerability+projections+from+Bayesian+inference+of+multiple+ground+water+age+tracers&rft.au=Alikhani%2C+Jamal%3BDeinhart%2C+Amanda+Lee%3BVisser%2C+Ate%3BBibby%2C+Richard+K%3BPurtschert%2C+Roland%3BMoran%2C+Jean+E%3BMassoudieh%2C+Arash%3BEsser%2C+Bradley+K&rft.aulast=Alikhani&rft.aufirst=Jamal&rft.date=2016-12-01&rft.volume=543&rft.issue=Part+A&rft.spage=167&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2016.04.028 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 - 101 N1 - Document feature - illus. incl. 10 tables, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2017-03-02 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - absolute age; Bayesian analysis; C-14; California; carbon; Cenozoic; dates; environmental analysis; Gaussian-Dirac model; helium; Holocene; hydrogen; isotopes; Kr-85; krypton; mass spectra; mathematical methods; models; nitrates; noble gases; pollutants; pollution; Quaternary; radioactive isotopes; residence time; spectra; Stanislaus County California; statistical analysis; tritium; Turlock California; United States; upper Holocene; water pollution DO - http://dx.doi.org/10.1016/j.jhydrol.2016.04.028 ER - TY - JOUR T1 - Quantifying ground water traveltime near managed recharge operations using (super 35) S as an intrinsic tracer AN - 1873351024; 2017-015794 AB - Identifying groundwater retention times near managed aquifer recharge (MAR) facilities is a high priority for managing water quality, especially for operations that incorporate recycled wastewater. To protect public health, California guidelines for Groundwater Replenishment Reuse Projects require a minimum 2-6 month subsurface retention time for recycled water depending on the level of disinfection, which highlights the importance of quantifying groundwater travel times on short time scales. This study developed and evaluated a new intrinsic tracer method using the naturally occurring radioisotope sulfur-35 ( (super 35) S). The 87.5 day half-life of (super 35) S is ideal for investigating groundwater travel times on the <1 year timescale of interest to MAR managers. Natural concentrations of (super 35) S found in water as dissolved sulfate ( (super 35) SO (sub 4) ) were measured in source waters and groundwater at the Rio Hondo Spreading Grounds in Los Angeles County, CA, and Orange County Groundwater Recharge Facilities in Orange County, CA. (super 35) SO (sub 4) travel times are comparable to travel times determined by well-established deliberate tracer studies. The study also revealed that (super 35) SO (sub 4) in MAR source water can vary seasonally and therefore careful characterization of (super 35) SO (sub 4) is needed to accurately quantify groundwater travel time. More data is needed to fully assess whether or not this tracer could become a valuable tool for managers. JF - Journal of Hydrology AU - Uriostegui, Stephanie H AU - Bibby, Richard K AU - Esser, Bradley K AU - Clark, Jordan F Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 145 EP - 154 PB - Elsevier, Amsterdam VL - 543 IS - Part A SN - 0022-1694, 0022-1694 KW - United States KW - Los Angeles County California KW - experimental studies KW - sulfates KW - isotopes KW - Orange County California KW - solutes KW - managed aquifer recharge KW - S-35 KW - ground water KW - aquifers KW - California KW - laboratory studies KW - recharge KW - radioactive isotopes KW - dates KW - residence time KW - traveltime KW - tracers KW - retention KW - absolute age KW - sulfur KW - 02B:Hydrochemistry KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873351024?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Quantifying+ground+water+traveltime+near+managed+recharge+operations+using+%28super+35%29+S+as+an+intrinsic+tracer&rft.au=Uriostegui%2C+Stephanie+H%3BBibby%2C+Richard+K%3BEsser%2C+Bradley+K%3BClark%2C+Jordan+F&rft.aulast=Uriostegui&rft.aufirst=Stephanie&rft.date=2016-12-01&rft.volume=543&rft.issue=Part+A&rft.spage=145&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2016.04.036 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 - 37 N1 - Document feature - illus. incl. 8 tables, sketch map N1 - Last updated - 2017-03-02 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - absolute age; aquifers; California; dates; experimental studies; ground water; isotopes; laboratory studies; Los Angeles County California; managed aquifer recharge; Orange County California; radioactive isotopes; recharge; residence time; retention; S-35; solutes; sulfates; sulfur; tracers; traveltime; United States DO - http://dx.doi.org/10.1016/j.jhydrol.2016.04.036 ER - TY - JOUR T1 - Regional oxygen reduction and denitrification rates in ground water from multi-model residence time distributions, San Joaquin Valley, USA AN - 1873347705; 2017-015795 AB - Rates of oxygen and nitrate reduction are key factors in determining the chemical evolution of groundwater. Little is known about how these rates vary and covary in regional groundwater settings, as few studies have focused on regional datasets with multiple tracers and methods of analysis that account for effects of mixed residence times on apparent reaction rates. This study provides insight into the characteristics of residence times and rates of O (sub 2) reduction and denitrification (NO (sub 3) (super -) reduction) by comparing reaction rates using multi-model analytical residence time distributions (RTDs) applied to a data set of atmospheric tracers of groundwater age and geochemical data from 141 well samples in the Central Eastern San Joaquin Valley, CA. The RTD approach accounts for mixtures of residence times in a single sample to provide estimates of in-situ rates. Tracers included SF (sub 6) , CFCs, (super 3) H, He from (super 3) H (tritiogenic He), (super 14) C, and terrigenic He. Parameter estimation and multi-model averaging were used to establish RTDs with lower error variances than those produced by individual RTD models. The set of multi-model RTDs was used in combination with NO (sub 3) (super -) and dissolved gas data to estimate zero order and first order rates of O (sub 2) reduction and denitrification. Results indicated that O (sub 2) reduction and denitrification rates followed approximately log-normal distributions. Rates of O (sub 2) and NO (sub 3) (super -) reduction were correlated and, on an electron milliequivalent basis, denitrification rates tended to exceed O (sub 2) reduction rates. Estimated historical NO (sub 3) (super -) trends were similar to historical measurements. Results show that the multi-model approach can improve estimation of age distributions, and that relatively easily measured O (sub 2) rates can provide information about trends in denitrification rates, which are more difficult to estimate. JF - Journal of Hydrology AU - Green, Christopher T AU - Jurgens, Bryant C AU - Zhang, Yong AU - Starn, J Jeffrey AU - Singleton, Michael J AU - Esser, Bradley K Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 155 EP - 166 PB - Elsevier, Amsterdam VL - 543 IS - Part A SN - 0022-1694, 0022-1694 KW - United States KW - oxygen KW - isotopes KW - tritium KW - environmental analysis KW - statistical distribution KW - ground water KW - California KW - radioactive isotopes KW - dates KW - noble gases KW - denitrification KW - carbon KW - tracers KW - absolute age KW - helium KW - water pollution KW - sulfur hexafluoride KW - San Joaquin Valley KW - pollutants KW - statistical analysis KW - solutes KW - pollution KW - correlation KW - models KW - hydrogen KW - residence time KW - mathematical methods KW - C-14 KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873347705?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Regional+oxygen+reduction+and+denitrification+rates+in+ground+water+from+multi-model+residence+time+distributions%2C+San+Joaquin+Valley%2C+USA&rft.au=Green%2C+Christopher+T%3BJurgens%2C+Bryant+C%3BZhang%2C+Yong%3BStarn%2C+J+Jeffrey%3BSingleton%2C+Michael+J%3BEsser%2C+Bradley+K&rft.aulast=Green&rft.aufirst=Christopher&rft.date=2016-12-01&rft.volume=543&rft.issue=Part+A&rft.spage=155&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2016.05.018 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 - 100 N1 - Document feature - illus. incl. 3 tables, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2017-03-02 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - absolute age; C-14; California; carbon; correlation; dates; denitrification; environmental analysis; ground water; helium; hydrogen; isotopes; mathematical methods; models; noble gases; oxygen; pollutants; pollution; radioactive isotopes; residence time; San Joaquin Valley; solutes; statistical analysis; statistical distribution; sulfur hexafluoride; tracers; tritium; United States; water pollution DO - http://dx.doi.org/10.1016/j.jhydrol.2016.05.018 ER - TY - JOUR T1 - Moment tensor analysis of very shallow sources AN - 1859791442; 2017-006001 AB - An issue for moment tensor (MT) inversion of shallow seismic sources is that some components of the Green's functions have vanishing amplitudes at the free surface, which can result in bias in the MT solution. The effects of the free surface on the stability of the MT method become important as we continue to investigate and improve the capabilities of regional full MT inversion for source-type identification and discrimination. It is important to understand free-surface effects on discriminating shallow explosive sources for nuclear monitoring purposes. It may also be important in natural systems that have very shallow seismicity, such as volcanic and geothermal systems. We examine the effects of the free surface on the MT via synthetic testing and apply the MT-based discrimination method to three quarry blasts from the HUMMING ALBATROSS experiment. These shallow chemical explosions at approximately 10 m depth and recorded up to several kilometers distance represent rather severe source-station geometry in terms of free-surface effects. We show that the method is capable of recovering a predominantly explosive source mechanism, and the combined waveform and first-motion method enables the unique discrimination of these events. Recovering the design yield using seismic moment estimates from MT inversion remains challenging, but we can begin to put error bounds on our moment estimates using the network sensitivity solution technique (Ford et al., 2010). JF - Bulletin of the Seismological Society of America AU - Chiang, Andrea AU - Dreger, Douglas S AU - Ford, Sean R AU - Walter, William R AU - Yoo, Seung-Hoon Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 2436 EP - 2449 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 6 SN - 0037-1106, 0037-1106 KW - explosions KW - shallow-focus earthquakes KW - seismic moment KW - human activity KW - chemical explosions KW - quarries KW - petroleum KW - Green function KW - waveforms KW - seismic sources KW - depth KW - geothermal systems KW - moment tensors KW - seismicity KW - blasting KW - volcanoes KW - focus KW - earthquakes KW - faults KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859791442?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Moment+tensor+analysis+of+very+shallow+sources&rft.au=Chiang%2C+Andrea%3BDreger%2C+Douglas+S%3BFord%2C+Sean+R%3BWalter%2C+William+R%3BYoo%2C+Seung-Hoon&rft.aulast=Chiang&rft.aufirst=Andrea&rft.date=2016-12-01&rft.volume=106&rft.issue=6&rft.spage=2436&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150233 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 - 43 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - blasting; chemical explosions; depth; earthquakes; explosions; faults; focus; geothermal systems; Green function; human activity; moment tensors; petroleum; quarries; seismic moment; seismic sources; seismicity; shallow-focus earthquakes; volcanoes; waveforms DO - http://dx.doi.org/10.1785/0120150233 ER - TY - JOUR T1 - Impact of decadal cloud variations on the Earth's energy budget AN - 1850774643; PQ0003912291 AB - Feedbacks of clouds on climate change strongly influence the magnitude of global warming. Cloud feedbacks, in turn, depend on the spatial patterns of surface warming, which vary on decadal timescales. Therefore, the magnitude of the decadal cloud feedback could deviate from the long-term cloud feedback. Here we present climate model simulations to show that the global mean cloud feedback in response to decadal temperature fluctuations varies dramatically due to time variations in the spatial pattern of sea surface temperature. We find that cloud anomalies associated with these patterns significantly modify the Earth's energy budget. Specifically, the decadal cloud feedback between the 1980s and 2000s is substantially more negative than the long-term cloud feedback. This is a result of cooling in tropical regions where air descends, relative to warming in tropical ascent regions, which strengthens low-level atmospheric stability. Under these conditions, low-level cloud cover and its reflection of solar radiation increase, despite an increase in global mean surface temperature. These results suggest that sea surface temperature pattern-induced low cloud anomalies could have contributed to the period of reduced warming between 1998 and 2013, and offer a physical explanation of why climate sensitivities estimated from recently observed trends are probably biased low. JF - Nature Geoscience AU - Zhou, Chen AU - Zelinka, Mark D AU - Klein, Stephen A AD - Cloud Processes Research Group, Lawrence Livermore National Laboratory, Livermore, California 94550, USA Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 871 EP - 874 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 9 IS - 12 SN - 1752-0894, 1752-0894 KW - Ecology Abstracts; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Surface temperatures KW - Sea surface KW - Climatic changes KW - Climate change KW - Cloud variations KW - Solar radiation KW - Low clouds KW - Models KW - Sea surface temperature anomalies KW - Feedback KW - Temperature effects KW - Marine KW - Climate models KW - Simulation Analysis KW - Climates KW - Climate KW - Temperature KW - Cloud Cover KW - Greenhouse effect KW - Temperature fluctuations KW - Cloud cover KW - Water temperature KW - Global Warming KW - Energy budget KW - Ecosystem disturbance KW - Surface temperature KW - Clouds KW - Numerical simulations KW - Energy KW - Global warming KW - Temperature trends KW - Fluctuations KW - Q2 09262:Methods and instruments KW - M2 551.583:Variations (551.583) KW - SW 0810:General KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1850774643?accountid=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=Nature+Geoscience&rft.atitle=Impact+of+decadal+cloud+variations+on+the+Earth%27s+energy+budget&rft.au=Zhou%2C+Chen%3BZelinka%2C+Mark+D%3BKlein%2C+Stephen+A&rft.aulast=Zhou&rft.aufirst=Chen&rft.date=2016-12-01&rft.volume=9&rft.issue=12&rft.spage=871&rft.isbn=&rft.btitle=&rft.title=Nature+Geoscience&rft.issn=17520894&rft_id=info:doi/10.1038%2Fngeo2828 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Temperature effects; Sea surface; Climate change; Climate; Greenhouse effect; Water temperature; Ecosystem disturbance; Energy budget; Surface temperature; Clouds; Climatic changes; Global warming; Feedback; Solar radiation; Models; Surface temperatures; Climate models; Cloud variations; Cloud cover; Temperature fluctuations; Low clouds; Sea surface temperature anomalies; Numerical simulations; Temperature trends; Simulation Analysis; Energy; Climates; Cloud Cover; Temperature; Fluctuations; Global Warming; Marine DO - http://dx.doi.org/10.1038/ngeo2828 ER - TY - JOUR T1 - Multi-material closure model for high-order finite element Lagrangian hydrodynamics AN - 1846400458; PQ0003834831 AB - We present a new closure model for single fluid, multi-material Lagrangian hydrodynamics and its application to high-order finite element discretizations of these equations . The model is general with respect to the number of materials, dimension and space and time discretizations. Knowledge about exact material interfaces is not required. Material indicator functions are evolved by a closure computation at each quadrature point of mixed cells, which can be viewed as a high-order variational generalization of the method of Tipton . This computation is defined by the notion of partial non-instantaneous pressure equilibration, while the full pressure equilibration is achieved by both the closure model and the hydrodynamic motion. Exchange of internal energy between materials is derived through entropy considerations, that is, every material produces positive entropy, and the total entropy production is maximized in compression and minimized in expansion. Results are presented for standard one-dimensional two-material problems, followed by two-dimensional and three-dimensional multi-material high-velocity impact arbitrary Lagrangian-Eulerian calculations. We present a closure model that evolves material properties at quadrature point level. The method is general with respect to the number of materials, dimension and space and time discretizations.Material volumes are evolved by imposing partial pressure equilibration, and internal energy exchange between materials is determined by considerations of the expected behavior of the entropy production. Results are presented for standard one-dimensional two-material problems, followed by two-dimensional and three-dimensional multi-material arbitrary Lagrangian-Eulerian high-velocity impacts. JF - International Journal for Numerical Methods in Fluids AU - Dobrev, V A AU - Kolev, T V AU - Rieben, R N AU - Tomov, V Z AD - Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, Livermore, CA, USA. Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 689 EP - 706 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 82 IS - 10 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Mathematical models KW - Hydrodynamics KW - Indicators KW - Expansion KW - Methodology KW - Energy KW - Fluid dynamics KW - Standards KW - Entropy KW - Modelling KW - AQ 00001:Water Resources and Supplies KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846400458?accountid=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=Multi-material+closure+model+for+high-order+finite+element+Lagrangian+hydrodynamics&rft.au=Dobrev%2C+V+A%3BKolev%2C+T+V%3BRieben%2C+R+N%3BTomov%2C+V+Z&rft.aulast=Dobrev&rft.aufirst=V&rft.date=2016-12-01&rft.volume=82&rft.issue=10&rft.spage=689&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.4236 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Mathematical models; Hydrodynamics; Fluid dynamics; Entropy; Methodology; Modelling; Energy; Indicators; Standards; Expansion DO - http://dx.doi.org/10.1002/fld.4236 ER - TY - JOUR T1 - Diagnostic Microdosing Approach to Study Gemcitabine Resistance. AN - 1835406500; 27657672 AB - Gemcitabine metabolites cause the termination of DNA replication and induction of apoptosis. We determined whether subtherapeutic "microdoses" of gemcitabine are incorporated into DNA at levels that correlate to drug cytotoxicity. A pair of nearly isogenic bladder cancer cell lines differing in resistance to several chemotherapy drugs were treated with various concentrations of 14C-labeled gemcitabine for 4-24 h. Drug incorporation into DNA was determined by accelerator mass spectrometry. A mechanistic analysis determined that RRM2, a DNA synthesis protein and a known resistance factor, substantially mediated gemcitabine toxicity. These results support gemcitabine levels in DNA as a potential biomarker of drug cytotoxicity. JF - Chemical research in toxicology AU - Scharadin, Tiffany M AU - Zhang, Hongyong AU - Zimmermann, Maike AU - Wang, Sisi AU - Malfatti, Michael A AU - Cimino, George D AU - Turteltaub, Kenneth AU - de Vere White, Ralph AU - Pan, Chong-Xian AU - Henderson, Paul T AD - Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis , Sacramento, California 95817, United States. ; Biosciences and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory , Livermore, California 94550, United States. ; Accelerated Medical Diagnostics Incorporated , Berkeley, California 95618, United States. ; Department of Urology, University of California Davis Medical Center , Sacramento, California 95817, United States. Y1 - 2016/11/21/ PY - 2016 DA - 2016 Nov 21 SP - 1843 EP - 1848 VL - 29 IS - 11 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1835406500?accountid=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+research+in+toxicology&rft.atitle=Diagnostic+Microdosing+Approach+to+Study+Gemcitabine+Resistance.&rft.au=Scharadin%2C+Tiffany+M%3BZhang%2C+Hongyong%3BZimmermann%2C+Maike%3BWang%2C+Sisi%3BMalfatti%2C+Michael+A%3BCimino%2C+George+D%3BTurteltaub%2C+Kenneth%3Bde+Vere+White%2C+Ralph%3BPan%2C+Chong-Xian%3BHenderson%2C+Paul+T&rft.aulast=Scharadin&rft.aufirst=Tiffany&rft.date=2016-11-21&rft.volume=29&rft.issue=11&rft.spage=1843&rft.isbn=&rft.btitle=&rft.title=Chemical+research+in+toxicology&rft.issn=1520-5010&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-09-22 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 ER - TY - JOUR T1 - Synchrotron Mossbauer source technique for in situ measurement of iron-bearing inclusions in natural diamonds AN - 1873351045; 2017-015780 AB - We describe a new methodology to collect energy domain Mossbauer spectra of inclusions in natural diamonds using a Synchrotron Mossbauer Source (SMS). Measurements were carried out at the Nuclear Resonance beamline ID18 at the European Synchrotron Radiation Facility (Grenoble, France). We applied this non-destructive approach to collect SMS spectra of a ferropericlase inclusion still contained within its diamond host from Juina (Brazil). The high spatial resolution of the measurement ( approximately 15 mu m) enabled multiple regions of the 190 X 105 mu m (super 2) inclusion to be sampled and showed that while Fe (super 3+) /Fe (sub tot) values in ferropericlase were below the detection limit (0.02) overall, there was a magnetic component whose abundance varied systematically across the inclusion. Hyperfine parameters of the magnetic component are consistent with magnesioferrite, and the absence of superparamagnetism allows the minimum particle size to be estimated as approximately 30 nm. Bulk Fe (super 3+) /Fe (sub tot) values are similar to those reported for other ferropericlase inclusions from Juina, and their variation across the inclusion can provide constraints on its history. JF - Lithos (Oslo) AU - Nestola, Fabrizio AU - Cerantola, V AU - Milani, Sula AU - Anzolini, Chiara AU - McCammon, C AU - Novella, D AU - Kupenko, I AU - Chumakov, A AU - Rueffer, R AU - Harris, J W AU - Shirey, S B Y1 - 2016/11/15/ PY - 2016 DA - 2016 Nov 15 SP - 328 EP - 333 PB - Elsevier, Amsterdam VL - 265 SN - 0024-4937, 0024-4937 KW - periclase KW - oxygen KW - Juina Brazil KW - techniques KW - Sao Luiz River KW - iron KW - fugacity KW - magnetic properties KW - magnetic minerals KW - inclusions KW - diamond KW - oxides KW - spectra KW - nuclear magnetic resonance KW - chemical composition KW - Mossbauer spectra KW - diamond deposits KW - in situ KW - electron microscopy data KW - native elements KW - TEM data KW - samples KW - measurement KW - Mato Grosso Brazil KW - mineral inclusions KW - South America KW - placers KW - metals KW - Brazil KW - magnetic susceptibility KW - synchrotrons KW - anvil cells KW - spectroscopy KW - 01A:General mineralogy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873351045?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Synchrotron+Mossbauer+source+technique+for+in+situ+measurement+of+iron-bearing+inclusions+in+natural+diamonds&rft.au=Nestola%2C+Fabrizio%3BCerantola%2C+V%3BMilani%2C+Sula%3BAnzolini%2C+Chiara%3BMcCammon%2C+C%3BNovella%2C+D%3BKupenko%2C+I%3BChumakov%2C+A%3BRueffer%2C+R%3BHarris%2C+J+W%3BShirey%2C+S+B&rft.aulast=Nestola&rft.aufirst=Fabrizio&rft.date=2016-11-15&rft.volume=265&rft.issue=&rft.spage=328&rft.isbn=&rft.btitle=&rft.title=Lithos+%28Oslo%29&rft.issn=00244937&rft_id=info:doi/10.1016%2Fj.lithos.2016.06.016 L2 - http://www.sciencedirect.com/science/journal/00244937 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 - 31 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-03-02 N1 - CODEN - LITHAN N1 - SubjectsTermNotLitGenreText - anvil cells; Brazil; chemical composition; diamond; diamond deposits; electron microscopy data; fugacity; in situ; inclusions; iron; Juina Brazil; magnetic minerals; magnetic properties; magnetic susceptibility; Mato Grosso Brazil; measurement; metals; mineral inclusions; Mossbauer spectra; native elements; nuclear magnetic resonance; oxides; oxygen; periclase; placers; samples; Sao Luiz River; South America; spectra; spectroscopy; synchrotrons; techniques; TEM data DO - http://dx.doi.org/10.1016/j.lithos.2016.06.016 ER - TY - JOUR T1 - Chemical and Sr isotopic characterization of North America uranium ores: Nuclear forensic applications AN - 1861077928; 786151-3 AB - This study reports major, minor, and trace element data and Sr isotope ratios for 11 uranium ore (uraninite, UO (sub 2+x) ) samples and one processed uranium ore concentrate (UOC) from various U.S. deposits. The uraninite investigated represent ores formed via different modes of mineralization (e.g., high- and low-temperature) and within various geological contexts, which include magmatic pegmatites, metamorphic rocks, sandstone-hosted, and roll front deposits. In situ trace element data obtained by laser ablation-ICP-MS and bulk sample Sr isotopic ratios for uraninite samples investigated here indicate distinct signatures that are highly dependent on the mode of mineralization and host rock geology. Relative to their high-temperature counterparts, low-temperature uranium ores record high U/Th ratios (>1000), low total rare earth element (REE) abundances (300 ppm) of first row transition metals (Sc, Ti, V, Cr, Mn, Co, Ni), and radiogenic (super 87) Sr/ (super 86) Sr ratios (>0.7200). Comparison of chondrite normalized REE patterns between uraninite and corresponding processed UOC from the same locality indicates identical patterns at different absolute concentrations. This result ultimately confirms the importance of establishing geochemical signatures of raw, uranium ore materials for attribution purposes in the forensic analysis of intercepted nuclear materials. JF - Applied Geochemistry AU - Balboni, Enrica AU - Jones, Nina AU - Spano, Tyler AU - Simonetti, Antonio AU - Burns, Peter C Y1 - 2016/11// PY - 2016 DA - November 2016 SP - 24 EP - 32 PB - Elsevier, Oxford-New York-Beijing VL - 74 SN - 0883-2927, 0883-2927 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861077928?accountid=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+Geochemistry&rft.atitle=Chemical+and+Sr+isotopic+characterization+of+North+America+uranium+ores%3A+Nuclear+forensic+applications&rft.au=Balboni%2C+Enrica%3BJones%2C+Nina%3BSpano%2C+Tyler%3BSimonetti%2C+Antonio%3BBurns%2C+Peter+C&rft.aulast=Balboni&rft.aufirst=Enrica&rft.date=2016-11-01&rft.volume=74&rft.issue=&rft.spage=24&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2016.08.016 L2 - http://www.sciencedirect.com/science/journal/08832927 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.apgeochem.2016.08.016 ER - TY - JOUR T1 - A smectic dodecagonal quasicrystal AN - 1846410060; PQ0003848088 AB - We report a solid smectic phase that exhibits dodecagonal global order. It is composed of axially stacked hexagonally ordered particle layers, and its 12-fold rotational symmetry induced by the 30 degree rotation of adjacent layers with respect to each other. A quasicrystal was produced in a molecular-dynamics simulation of a single-component system of particles interacting via a spherically-symmetric potential. It was formed as a result of a first-order phase transition from an isotropic liquid state that occurred under constant-density cooling. This finding implies that a similarly structured quasicrystal can possibly be produced by the same class of systems as those forming smectic-B crystals. This quasicrystal can also be expected to arise in a system of spherically-shaped colloidal particles with appropriately tuned potential. JF - Soft Matter AU - Metere, Alfredo AU - Oleynikov, Peter AU - Dzugutov, Mikhail AU - Lidin, Sven AD - Physical and Life Sciences Directorate; Computational Materials Science in the Condensed Matter and Materials Division; Lawrence Livermore National Laboratory; 7000 East Avenue L-367; Livermore; CA - 94550; USA; +1 (925) 800-9731 Y1 - 2016/11// PY - 2016 DA - November 2016 SP - 8869 EP - 8875 PB - Royal Society of Chemistry VL - 12 IS - 43 SN - 1744-683X, 1744-683X KW - Biotechnology and Bioengineering Abstracts KW - Phase transition KW - Crystals KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846410060?accountid=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=A+smectic+dodecagonal+quasicrystal&rft.au=Metere%2C+Alfredo%3BOleynikov%2C+Peter%3BDzugutov%2C+Mikhail%3BLidin%2C+Sven&rft.aulast=Metere&rft.aufirst=Alfredo&rft.date=2016-11-01&rft.volume=12&rft.issue=43&rft.spage=8869&rft.isbn=&rft.btitle=&rft.title=Soft+Matter&rft.issn=1744683X&rft_id=info:doi/10.1039%2Fc6sm01832g LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Number of references - 33 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Phase transition; Crystals DO - http://dx.doi.org/10.1039/c6sm01832g ER - TY - JOUR T1 - Human Microdosing with Carcinogenic Polycyclic Aromatic Hydrocarbons: In Vivo Pharmacokinetics of Dibenzo[def,p]chrysene and Metabolites by UPLC Accelerator Mass Spectrometry. AN - 1835432584; 27494294 AB - Metabolism is a key health risk factor following exposures to pro-carcinogenic polycyclic aromatic hydrocarbons (PAHs) such as dibenzo[def,p]chrysene (DBC), an IARC classified 2A probable human carcinogen. Human exposure to PAHs occurs primarily from the diet in nonsmokers. However, little data is available on the metabolism and pharmacokinetics in humans of high molecular weight PAHs (≥4 aromatic rings), including DBC. We previously determined the pharmacokinetics of DBC in human volunteers orally administered a microdose (29 ng; 5 nCi) of [14C]-DBC by accelerator mass spectrometry (AMS) analysis of total [14C] in plasma and urine. In the current study, we utilized a novel "moving wire" interface between ultraperformance liquid chromatography (UPLC) and AMS to detect and quantify parent DBC and its major metabolites. The major [14C] product identified in plasma was unmetabolized [14C]-DBC itself (Cmax = 18.5 ±15.9 fg/mL, Tmax= 2.1 ± 1.0 h), whereas the major metabolite was identified as [14C]-(+/-)-DBC-11,12-diol (Cmax= 2.5 ±1.3 fg/mL, Tmax= 1.8 h). Several minor species of [14C]-DBC metabolites were also detected for which no reference standards were available. Free and conjugated metabolites were detected in urine with [14C]-(+/-)-DBC-11,12,13,14-tetraol isomers identified as the major metabolites, 56.3% of which were conjugated (Cmax= 35.8 ± 23.0 pg/pool, Tmax = 6-12 h pool). [14C]-DBC-11,12-diol, of which 97.5% was conjugated, was also identified in urine (Cmax = 29.4 ± 11.6 pg/pool, Tmax = 6-12 h pool). Parent [14C]-DBC was not detected in urine. This is the first data set to assess metabolite profiles and associated pharmacokinetics of a carcinogenic PAH in human volunteers at an environmentally relevant dose, providing the data necessary for translation of high dose animal models to humans for translation of environmental health risk assessment. JF - Chemical research in toxicology AU - Madeen, Erin P AU - Ognibene, Ted J AU - Corley, Richard A AU - McQuistan, Tammie J AU - Henderson, Marilyn C AU - Baird, William M AU - Bench, Graham AU - Turteltaub, Ken W AU - Williams, David E AD - Department of Environmental and Molecular Toxicology, Oregon State University , Corvallis, Oregon 97331, United States. ; Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory , Livermore, California 94550, United States. ; Superfund Research Program, Oregon State University , Corvallis, Oregon 97331, United States. Y1 - 2016/10/17/ PY - 2016 DA - 2016 Oct 17 SP - 1641 EP - 1650 VL - 29 IS - 10 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1835432584?accountid=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+research+in+toxicology&rft.atitle=Human+Microdosing+with+Carcinogenic+Polycyclic+Aromatic+Hydrocarbons%3A+In+Vivo+Pharmacokinetics+of+Dibenzo%5Bdef%2Cp%5Dchrysene+and+Metabolites+by+UPLC+Accelerator+Mass+Spectrometry.&rft.au=Madeen%2C+Erin+P%3BOgnibene%2C+Ted+J%3BCorley%2C+Richard+A%3BMcQuistan%2C+Tammie+J%3BHenderson%2C+Marilyn+C%3BBaird%2C+William+M%3BBench%2C+Graham%3BTurteltaub%2C+Ken+W%3BWilliams%2C+David+E&rft.aulast=Madeen&rft.aufirst=Erin&rft.date=2016-10-17&rft.volume=29&rft.issue=10&rft.spage=1641&rft.isbn=&rft.btitle=&rft.title=Chemical+research+in+toxicology&rft.issn=1520-5010&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-09-09 N1 - Date revised - 2017-02-20 N1 - Last updated - 2017-02-20 ER - TY - JOUR T1 - The dynamics of strategic stability and instability AN - 1855325961 AB - I apply a dynamic systems approach to define strategic stability and classify strategic systems as stable, unstable, or neutral, based on the nature of forces that strategic capabilities exert under perturbation away from equilibrium. Conceptualizing stability in this manner is helpful when considering its relationship to mutual vulnerability, its role in extended deterrence relationships, and prospects for maintaining stability along proposed paths to disarmament. Traditional U.S. policy objectives do not appear to distinguish between true stability and neutral stability, and traditional definitions of strategic stability describe neutral stability. True strategic stability is an unlikely policy objective for the United States. JF - Comparative Strategy AU - Miles, Aaron R AD - Center for Global Security Research, Lawrence Livermore National Laboratory, Livermore, CA, USA ; Center for Global Security Research, Lawrence Livermore National Laboratory, Livermore, CA, USA Y1 - 2016/10// PY - 2016 DA - Oct 2016 SP - 423 EP - 437 CY - New York PB - Taylor & Francis Ltd. VL - 35 IS - 5 SN - 0149-5933 KW - Political Science KW - Neutralism KW - Disarmament KW - Deterrence KW - Stability KW - United States--US KW - 9261:public policy/administration; public policy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855325961?accountid=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=Comparative+Strategy&rft.atitle=The+dynamics+of+strategic+stability+and+instability&rft.au=Miles%2C+Aaron+R&rft.aulast=Miles&rft.aufirst=Aaron&rft.date=2016-10-01&rft.volume=35&rft.issue=5&rft.spage=423&rft.isbn=&rft.btitle=&rft.title=Comparative+Strategy&rft.issn=01495933&rft_id=info:doi/10.1080%2F01495933.2016.1241005 LA - English DB - PAIS Index; Worldwide Political Science Abstracts N1 - Copyright - © 2016 Taylor & Francis N1 - Last updated - 2017-02-06 N1 - SubjectsTermNotLitGenreText - United States--US DO - http://dx.doi.org/10.1080/01495933.2016.1241005 ER - TY - JOUR T1 - Cavity radius scaling for underground explosions in hard rock AN - 1832727539; 2016-092859 AB - The main objective of this study was to examine the relationship between the explosive yield and the cavity sizes for chemical explosions in granite. We performed borehole studies in the two cavities produced by chemical explosions in Vermont, including the caliper, acoustic, and optical televiewer logs. The two irregularly shaped explosive cavities imaged during this study have the equivalent scaled radii of 8.26 and 8.34 m/kt (super 1/3) . Comparison of the cavity radii, determined in this study, with historical data from other chemical and nuclear explosions in hard rock (e.g., granite) demonstrates that the cavity radius as a function of yield obeys cube root scaling law. The empirical linear fit calculated for the nuclear cavity radii as a function of yield also provides a good approximation for the chemical cavity radii, even though the mechanisms responsible for the creation of cavities during chemical and nuclear shots are different. The depth dependence of the cavity size in hard rock appears to be weaker than proposed by the classical source theory, although there is not enough data to unambiguously resolve the depth dependence. The experimental field measurements of the cavity sizes (determined from geophysical log measurements) agree with the numerical simulations using the hydrodynamic code GEODYN (Antoun et al., 2000; Lomov et al., 2005), which confirm approximate cube root scaling with yield assuming that the quality of the rock mass is similar for all events. Online Material: Composite logs for the boreholes S1-3, S2-2, and S2-4. JF - Bulletin of the Seismological Society of America AU - Stroujkova, Anastasia AU - Carnevale, Mario AU - Vorobiev, Oleg Y1 - 2016/09/27/ PY - 2016 DA - 2016 Sep 27 SP - 2500 EP - 2510 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 6 SN - 0037-1106, 0037-1106 KW - United States KW - scale factor KW - fractured materials KW - imagery KW - geophysical surveys KW - igneous rocks KW - chemical explosions KW - granites KW - well-logging KW - elastic waves KW - simulation KW - plutonic rocks KW - underground cavities KW - nuclear explosions KW - yields KW - numerical models KW - three-dimensional models KW - explosions KW - GEODYN KW - morphometry KW - equations KW - borehole televiewers KW - Vermont KW - depth KW - size KW - measurement KW - boreholes KW - surveys KW - seismic waves KW - amplitude KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832727539?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cavity+radius+scaling+for+underground+explosions+in+hard+rock&rft.au=Stroujkova%2C+Anastasia%3BCarnevale%2C+Mario%3BVorobiev%2C+Oleg&rft.aulast=Stroujkova&rft.aufirst=Anastasia&rft.date=2016-09-27&rft.volume=106&rft.issue=6&rft.spage=2500&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120160122 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 - 32 N1 - PubXState - CA N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - amplitude; borehole televiewers; boreholes; chemical explosions; depth; elastic waves; equations; explosions; fractured materials; GEODYN; geophysical surveys; granites; igneous rocks; imagery; measurement; morphometry; nuclear explosions; numerical models; plutonic rocks; scale factor; seismic waves; simulation; size; surveys; three-dimensional models; underground cavities; United States; Vermont; well-logging; yields DO - http://dx.doi.org/10.1785/0120160122 ER - TY - JOUR T1 - Long-term non-invasive interrogation of human dorsal root ganglion neuronal cultures on an integrated microfluidic multielectrode array platform. AN - 1815680934; 27351032 AB - Scientific studies in drug development and toxicology rely heavily on animal models, which often inaccurately predict the true response for human exposure. This may lead to unanticipated adverse effects or misidentified risks that result in, for example, drug candidate elimination. The utilization of human cells and tissues for in vitro physiological platforms has become a growing area of interest to bridge this gap and to more accurately predict human responses to drugs and toxins. The effects of new drugs and toxins on the peripheral nervous system are often investigated with neurons isolated from dorsal root ganglia (DRG), typically with one-time measurement techniques such as patch clamping. Here, we report the use of our multi-electrode array (MEA) platform for long-term noninvasive assessment of human DRG cell health and function. In this study, we acquired simultaneous optical and electrophysiological measurements from primary human DRG neurons upon chemical stimulation repeatedly through day in vitro (DIV) 23. Distinct chemical signatures were noted for the cellular responses evoked by each chemical stimulus. Additionally, the cell viability and function of the human DRG neurons were consistent through DIV 23. To the best of our knowledge, this is the first report on long-term measurements of the cell health and function of human DRG neurons on a MEA platform. Future generations will include higher electrode numbers in customized arrangements as well as integration with different tissue types on a single device. This platform will provide a valuable testing tool for both rodent and human cells, enabling a more comprehensive risk assessment for drug candidates and toxicants. JF - The Analyst AU - Enright, H A AU - Felix, S H AU - Fischer, N O AU - Mukerjee, E V AU - Soscia, D AU - Mcnerney, M AU - Kulp, K AU - Zhang, J AU - Page, G AU - Miller, P AU - Ghetti, A AU - Wheeler, E K AU - Pannu, S AD - Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, CA, USA. Y1 - 2016/09/21/ PY - 2016 DA - 2016 Sep 21 SP - 5346 EP - 5357 VL - 141 IS - 18 KW - Index Medicus UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815680934?accountid=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+Analyst&rft.atitle=Long-term+non-invasive+interrogation+of+human+dorsal+root+ganglion+neuronal+cultures+on+an+integrated+microfluidic+multielectrode+array+platform.&rft.au=Enright%2C+H+A%3BFelix%2C+S+H%3BFischer%2C+N+O%3BMukerjee%2C+E+V%3BSoscia%2C+D%3BMcnerney%2C+M%3BKulp%2C+K%3BZhang%2C+J%3BPage%2C+G%3BMiller%2C+P%3BGhetti%2C+A%3BWheeler%2C+E+K%3BPannu%2C+S&rft.aulast=Enright&rft.aufirst=H&rft.date=2016-09-21&rft.volume=141&rft.issue=18&rft.spage=5346&rft.isbn=&rft.btitle=&rft.title=The+Analyst&rft.issn=1364-5528&rft_id=info:doi/10.1039%2Fc5an01728a LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-08-30 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1039/c5an01728a ER - TY - JOUR T1 - A nucleosynthetic origin for the Earth's anomalous (super 142) Nd composition AN - 1828850094; 2016-087345 JF - Nature (London) AU - Burkhardt, C AU - Borg, L E AU - Brennecka, G A AU - Shollenberger, Q R AU - Dauphas, N AU - Kleine, T Y1 - 2016/09/15/ PY - 2016 DA - 2016 Sep 15 SP - 394 EP - 398 PB - Macmillan Journals, London VL - 537 IS - 7620 SN - 0028-0836, 0028-0836 KW - silicates KW - solar system KW - ordinary chondrites KW - Earth KW - stony meteorites KW - isotopes KW - isotope ratios KW - differentiation KW - stable isotopes KW - models KW - meteorites KW - geodynamics KW - radioactive isotopes KW - Nd-144/Nd-142 KW - Sm/Nd KW - metals KW - geochemical anomalies KW - enstatite chondrites KW - rare earths KW - neodymium KW - chondrites KW - chemical composition KW - geochemistry KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828850094?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+nucleosynthetic+origin+for+the+Earth%27s+anomalous+%28super+142%29+Nd+composition&rft.au=Burkhardt%2C+C%3BBorg%2C+L+E%3BBrennecka%2C+G+A%3BShollenberger%2C+Q+R%3BDauphas%2C+N%3BKleine%2C+T&rft.aulast=Burkhardt&rft.aufirst=C&rft.date=2016-09-15&rft.volume=537&rft.issue=7620&rft.spage=394&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature18956 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 - 31 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-10-25 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - chemical composition; chondrites; differentiation; Earth; enstatite chondrites; geochemical anomalies; geochemistry; geodynamics; isotope ratios; isotopes; metals; meteorites; models; Nd-144/Nd-142; neodymium; ordinary chondrites; radioactive isotopes; rare earths; silicates; Sm/Nd; solar system; stable isotopes; stony meteorites DO - http://dx.doi.org/10.1038/nature18956 ER - TY - JOUR T1 - Moment magnitudes of local/regional events from 1D coda calibrations in the broader Middle East region AN - 1828850054; 2016-087272 AB - Reliable moment magnitude estimates for seismic events in the Middle East region can be difficult to obtain due to the uneven distribution of stations, the complex tectonic structure, and regions of high attenuation. In this study, we take advantage of the many new broadband seismic stations that have become available through improved national networks and numerous temporary deployments. We make coda envelope-amplitude measurements for 2247 events recorded by 68 stations over 13 narrow frequency bands ranging between 0.03 and 8 Hz. The absolute scaling of these spectra was calculated based on independent waveform modeling solutions of the moment magnitudes for a subset of these events to avoid circularity. Using our 1D path calibrations, we determined coda-based magnitudes for a majority of the events. We obtain fairly good agreement with waveform-modeled seismic moments for the larger events (M (sub w) >4.5) at low frequencies (0.7 Hz) because of unaccounted 2D path effects, as well as mixing of both Sn coda and Lg coda, which have different attenuation behavior. This scatter leads to increased variance in the magnitudes estimated for smaller events in which low-frequency amplitudes are below the noise levels and the higher frequencies are the only signals available. We quantify the expected variance in coda envelope amplitudes as a function of frequency using interstation scatter as our metric. The net results of this study provide thousands of new 1D coda magnitude estimates for events in the broad region, as well as the necessary initial starting model for use in a new related 2D coda study (Pasyanos et al., 2016).Online Material: Table of site terms and moment magnitudes. JF - Bulletin of the Seismological Society of America AU - Goek, Rengin AU - Kaviani, Ayoub AU - Matzel, Eric M AU - Pasyanos, Michael E AU - Mayeda, Kevin AU - Yetirmishli, Gurban AU - El-Hussain, Issa AU - Al-Amri, Abdullah AU - Al-Jeri, Farah AU - Godoladze, Tea AU - Kalafat, Dogan AU - Sandvol, Eric A AU - Walter, William R Y1 - 2016/09/13/ PY - 2016 DA - 2016 Sep 13 SP - 1926 EP - 1938 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 5 SN - 0037-1106, 0037-1106 KW - North Anatolian Fault KW - guided waves KW - one-dimensional models KW - magnitude KW - coda waves KW - Turkey KW - elastic waves KW - models KW - surface waves KW - seismicity KW - propagation KW - tectonics KW - seismic waves KW - algorithms KW - Asia KW - earthquakes KW - seismotectonics KW - Middle East KW - amplitude KW - 19:Seismology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828850054?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Moment+magnitudes+of+local%2Fregional+events+from+1D+coda+calibrations+in+the+broader+Middle+East+region&rft.au=Goek%2C+Rengin%3BKaviani%2C+Ayoub%3BMatzel%2C+Eric+M%3BPasyanos%2C+Michael+E%3BMayeda%2C+Kevin%3BYetirmishli%2C+Gurban%3BEl-Hussain%2C+Issa%3BAl-Amri%2C+Abdullah%3BAl-Jeri%2C+Farah%3BGodoladze%2C+Tea%3BKalafat%2C+Dogan%3BSandvol%2C+Eric+A%3BWalter%2C+William+R&rft.aulast=Goek&rft.aufirst=Rengin&rft.date=2016-09-13&rft.volume=106&rft.issue=5&rft.spage=1926&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120160045 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 - 33 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; amplitude; Asia; coda waves; earthquakes; elastic waves; guided waves; magnitude; Middle East; models; North Anatolian Fault; one-dimensional models; propagation; seismic waves; seismicity; seismotectonics; surface waves; tectonics; Turkey DO - http://dx.doi.org/10.1785/0120160045 ER - TY - JOUR T1 - Terrestrial cosmogenic surface exposure dating of glacial and associated landforms in the Ruby Mountains-east Humboldt Range of central Nevada and along the northeastern flank of the Sierra Nevada AN - 1832669040; 781311-8 AB - Deposits near Lamoille in the Ruby Mountains-East Humboldt Range of central Nevada and at Woodfords on the eastern edge of the Sierra Nevada each record two distinct glacial advances. We compare independent assessments of terrestrial cosmogenic nuclide (TCN) surface exposure ages for glacial deposits that we have determined to those obtained by others at the two sites. At each site, TCN ages of boulders on moraines of the younger advance are between 15 and 30 ka and may be associated with marine oxygen isotope stage (MIS) 2. At Woodfords, TCN ages of boulders on the moraine of the older advance are younger than nearly equal 60 ka and possibly formed during MIS 4, whereas boulders on the correlative outwash surface show ages approaching 140 ka ( nearly equal MIS 6). The TCN ages of boulders on older glacial moraine at Woodfords thus appear to severely underestimate the true age of the glacial advance responsible for the deposit. The same is possibly true at Lamoille where clasts sampled from the moraine of the oldest advance have ages ranging between 20 and 40 ka with a single outlier age of nearly equal 80 ka. The underestimations are attributed to the degradation and denudation of older moraine crests. Noting that boulder ages on the older advances at each site overlap significantly with MIS 2. We speculate that erosion of the older moraines has been episodic, with a pulse of denudation accompanying the inception of MIS 2 glaciation. JF - Geomorphology AU - Wesnousky, Steven G AU - Briggs, Richard W AU - Caffee, Marc W AU - Ryerson, F J AU - Finkel, Robert C AU - Owen, Lewis A Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 72 EP - 81 PB - Elsevier, Amsterdam VL - 268 SN - 0169-555X, 0169-555X KW - United States KW - Sierra Nevada KW - glaciation KW - isotopes KW - erosion KW - paleorelief KW - landforms KW - eastern Humboldt Range KW - upper Pleistocene KW - Cenozoic KW - radioactive isotopes KW - denudation KW - dates KW - moraines KW - absolute age KW - Nevada KW - Ruby Mountains KW - alkaline earth metals KW - Quaternary KW - Pershing County Nevada KW - Be-10 KW - central Nevada KW - Woodfords Nevada KW - glacial features KW - Lamoille Nevada KW - Humboldt Range KW - northeastern Sierra Nevada KW - metals KW - Pleistocene KW - geomorphology KW - beryllium KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832669040?accountid=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=Geomorphology&rft.atitle=Terrestrial+cosmogenic+surface+exposure+dating+of+glacial+and+associated+landforms+in+the+Ruby+Mountains-east+Humboldt+Range+of+central+Nevada+and+along+the+northeastern+flank+of+the+Sierra+Nevada&rft.au=Wesnousky%2C+Steven+G%3BBriggs%2C+Richard+W%3BCaffee%2C+Marc+W%3BRyerson%2C+F+J%3BFinkel%2C+Robert+C%3BOwen%2C+Lewis+A&rft.aulast=Wesnousky&rft.aufirst=Steven&rft.date=2016-09-01&rft.volume=268&rft.issue=&rft.spage=72&rft.isbn=&rft.btitle=&rft.title=Geomorphology&rft.issn=0169555X&rft_id=info:doi/10.1016%2Fj.geomorph.2016.04.027 L2 - http://www.sciencedirect.com/science/journal/0169555X 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 - 51 N1 - Document feature - illus. incl. table, geol. sketch maps N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - absolute age; alkaline earth metals; Be-10; beryllium; Cenozoic; central Nevada; dates; denudation; eastern Humboldt Range; erosion; geomorphology; glacial features; glaciation; Humboldt Range; isotopes; Lamoille Nevada; landforms; metals; moraines; Nevada; northeastern Sierra Nevada; paleorelief; Pershing County Nevada; Pleistocene; Quaternary; radioactive isotopes; Ruby Mountains; Sierra Nevada; United States; upper Pleistocene; Woodfords Nevada DO - http://dx.doi.org/10.1016/j.geomorph.2016.04.027 ER - TY - JOUR T1 - Non-invasive measurement of proppant pack deformation AN - 1828846877; 2016-086907 AB - In this paper, we describe a method to non-invasively study the movement of proppant packs at the sub-fracture scale by applying three-dimensional digital image correlation techniques to X-ray tomography data. Proppant movement is tracked in a fractured core of Marcellus shale placed under a series of increasing confining pressures up to 10,000 psi. The analysis reveals the sudden failure of a region of the proppant pack, accompanied by the large-scale rearrangement of grains across the entire fracture surface. The failure of the pack coincides with the appearance of vortex-like grain motions similar to features observed in biaxial compression of two dimensional granular assemblies JF - International Journal of Rock Mechanics and Mining Sciences (1997) AU - Walsh, Stuart D C AU - Smith, Megan AU - Carroll, Susan A AU - Crandall, Dustin Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 39 EP - 47 PB - Elsevier, Oxford-New York VL - 87 SN - 1365-1609, 1365-1609 KW - tomography KW - fractured materials KW - hydraulics KW - three-dimensional models KW - proppant KW - biaxial tests KW - shale KW - loading KW - non-invasive methods KW - deformation KW - rock mechanics KW - measurement KW - sedimentary rocks KW - compressive strength KW - confining pressure KW - clastic rocks KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846877?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Non-invasive+measurement+of+proppant+pack+deformation&rft.au=Walsh%2C+Stuart+D+C%3BSmith%2C+Megan%3BCarroll%2C+Susan+A%3BCrandall%2C+Dustin&rft.aulast=Walsh&rft.aufirst=Stuart+D&rft.date=2016-09-01&rft.volume=87&rft.issue=&rft.spage=39&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.2016.05.005 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 - 34 N1 - Document feature - illus. N1 - Last updated - 2016-10-25 N1 - CODEN - IJRMA2 N1 - SubjectsTermNotLitGenreText - biaxial tests; clastic rocks; compressive strength; confining pressure; deformation; fractured materials; hydraulics; loading; measurement; non-invasive methods; proppant; rock mechanics; sedimentary rocks; shale; three-dimensional models; tomography DO - http://dx.doi.org/10.1016/j.ijrmms.2016.05.005 ER - TY - JOUR T1 - Large scale seismic waveform quality metric calculation using Hadoop AN - 1815667989; 2016-076539 AB - In this work we investigated the suitability of Hadoop MapReduce and Apache Spark for large-scale computation of seismic waveform quality metrics by comparing their performance with that of a traditional distributed implementation. The Incorporated Research Institutions for Seismology (IRIS) Data Management Center (DMC) provided 43 terabytes of broadband waveform data of which 5.1 TB of data were processed with the traditional architecture, and the full 43 TB were processed using MapReduce and Spark. Maximum performance of approximately 0.56 terabytes per hour was achieved using all 5 nodes of the traditional implementation. We noted that I/O dominated processing, and that I/O performance was deteriorating with the addition of the 5th node. Data collected from this experiment provided the baseline against which the Hadoop results were compared. Next, we processed the full 43 TB dataset using both MapReduce and Apache Spark on our 18-node Hadoop cluster. These experiments were conducted multiple times with various subsets of the data so that we could build models to predict performance as a function of dataset size. We found that both MapReduce and Spark significantly outperformed the traditional reference implementation. At a dataset size of 5.1 terabytes, both Spark and MapReduce were about 15 times faster than the reference implementation. Furthermore, our performance models predict that for a dataset of 350 terabytes, Spark running on a 100-node cluster would be about 265 times faster than the reference implementation. We do not expect that the reference implementation deployed on a 100-node cluster would perform significantly better than on the 5-node cluster because the I/O performance cannot be made to scale. Finally, we note that although Big Data technologies clearly provide a way to process seismic waveform datasets in a high-performance and scalable manner, the technology is still rapidly changing, requires a high degree of investment in personnel, and will likely require significant changes in other parts of our infrastructure. Nevertheless, we anticipate that as the technology matures and third-party tool vendors make it easier to manage and operate clusters, Hadoop (or a successor) will play a large role in our seismic data processing. JF - Computers & Geosciences AU - Magana-Zook, S AU - Gaylord, J M AU - Knapp, D R AU - Dodge, Douglas A AU - Ruppert, S D Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 18 EP - 30 PB - Elsevier, Amsterdam VL - 94 SN - 0098-3004, 0098-3004 KW - Hadoop KW - data acquisition KW - statistical analysis KW - geophysical methods KW - data processing KW - prediction KW - elastic waves KW - waveforms KW - seismic methods KW - models KW - computer programs KW - mathematical methods KW - seismic waves KW - computer networks KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815667989?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Large+scale+seismic+waveform+quality+metric+calculation+using+Hadoop&rft.au=Magana-Zook%2C+S%3BGaylord%2C+J+M%3BKnapp%2C+D+R%3BDodge%2C+Douglas+A%3BRuppert%2C+S+D&rft.aulast=Magana-Zook&rft.aufirst=S&rft.date=2016-09-01&rft.volume=94&rft.issue=&rft.spage=18&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Geosciences&rft.issn=00983004&rft_id=info:doi/10.1016%2Fj.cageo.2016.05.012 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 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 11 N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-11-17 N1 - CODEN - GGEOD5 N1 - SubjectsTermNotLitGenreText - computer networks; computer programs; data acquisition; data processing; elastic waves; geophysical methods; Hadoop; mathematical methods; models; prediction; seismic methods; seismic waves; statistical analysis; waveforms DO - http://dx.doi.org/10.1016/j.cageo.2016.05.012 ER - TY - JOUR T1 - Impact disruption of gravity-dominated bodies; new simulation data and scaling AN - 1812216751; 2016-068977 JF - Icarus AU - Movshovitz, N AU - Nimmo, Francis AU - Korycansky, D G AU - Asphaug, E AU - Owen, J Michael Y1 - 2016/09/01/ PY - 2016 DA - 2016 Sep 01 SP - 85 EP - 96 PB - Elsevier, New York, NY VL - 275 SN - 0019-1035, 0019-1035 KW - kinetic energy KW - accretion KW - numerical models KW - planetesimals KW - impacts KW - simulation KW - size KW - mass KW - scale models KW - oblique orientation KW - velocity KW - planetology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812216751?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Impact+disruption+of+gravity-dominated+bodies%3B+new+simulation+data+and+scaling&rft.au=Movshovitz%2C+N%3BNimmo%2C+Francis%3BKorycansky%2C+D+G%3BAsphaug%2C+E%3BOwen%2C+J+Michael&rft.aulast=Movshovitz&rft.aufirst=N&rft.date=2016-09-01&rft.volume=275&rft.issue=&rft.spage=85&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2016.04.018 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 41 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-08-18 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - accretion; impacts; kinetic energy; mass; numerical models; oblique orientation; planetesimals; planetology; scale models; simulation; size; velocity DO - http://dx.doi.org/10.1016/j.icarus.2016.04.018 ER - TY - JOUR T1 - Uranus evolution models with simple thermal boundary layers AN - 1812215602; 2016-068979 JF - Icarus AU - Nettelmann, Nadine AU - Wang, K AU - Fortney, J J AU - Hamel, S AU - Yellamilli, S AU - Bethkenhagen, M AU - Redmer, R Y1 - 2016/09/01/ PY - 2016 DA - 2016 Sep 01 SP - 107 EP - 116 PB - Elsevier, New York, NY VL - 275 SN - 0019-1035, 0019-1035 KW - ammonium KW - aliphatic hydrocarbons KW - troposphere KW - thermal history KW - temperature KW - giant planets KW - noble gases KW - ice KW - helium KW - outer planets KW - equations of state KW - thermodynamic properties KW - rocks KW - boundary layer KW - water KW - methane KW - heat flux KW - pressure KW - atmosphere KW - alkanes KW - high pressure KW - models KW - planets KW - organic compounds KW - Uranus KW - stratification KW - hydrogen KW - planetary interiors KW - hydrocarbons KW - luminosity KW - ice shells KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812215602?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Uranus+evolution+models+with+simple+thermal+boundary+layers&rft.au=Nettelmann%2C+Nadine%3BWang%2C+K%3BFortney%2C+J+J%3BHamel%2C+S%3BYellamilli%2C+S%3BBethkenhagen%2C+M%3BRedmer%2C+R&rft.aulast=Nettelmann&rft.aufirst=Nadine&rft.date=2016-09-01&rft.volume=275&rft.issue=&rft.spage=107&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2016.04.008 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 60 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-08-18 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; ammonium; atmosphere; boundary layer; equations of state; giant planets; heat flux; helium; high pressure; hydrocarbons; hydrogen; ice; ice shells; luminosity; methane; models; noble gases; organic compounds; outer planets; planetary interiors; planets; pressure; rocks; stratification; temperature; thermal history; thermodynamic properties; troposphere; Uranus; water DO - http://dx.doi.org/10.1016/j.icarus.2016.04.008 ER - TY - JOUR T1 - Kinematic ground-motion simulations on rough faults including effects of 3D stochastic velocity perturbations AN - 1828846860; 2016-087171 AB - We describe a methodology for generating kinematic earthquake ruptures for use in 3D ground-motion simulations over the 0-5 Hz frequency band. Our approach begins by specifying a spatially random slip distribution that has a roughly wavenumber-squared fall-off. Given a hypocenter, the rupture speed is specified to average about 75%-80% of the local shear wavespeed and the prescribed slip-rate function has a Kostrov-like shape with a fault-averaged rise time that scales self-similarly with the seismic moment. Both the rupture time and rise time include significant local perturbations across the fault surface specified by spatially random fields that are partially correlated with the underlying slip distribution. We represent velocity-strengthening fault zones in the shallow (15 km) crust by decreasing rupture speed and increasing rise time in these regions. Additional refinements to this approach include the incorporation of geometric perturbations to the fault surface, 3D stochastic correlated perturbations to the P- and S-wave velocity structure, and a damage zone surrounding the shallow fault surface characterized by a 30% reduction in seismic velocity. We demonstrate the approach using a suite of simulations for a hypothetical M (sub w) 6.45 strike-slip earthquake embedded in a generalized hard-rock velocity structure. The simulation results are compared with the median predictions from the 2014 Next Generation Attenuation-West2 Project ground-motion prediction equations and show very good agreement over the frequency band 0.1-5 Hz for distances out to 25 km from the fault. Additionally, the newly added features act to reduce the coherency of the radiated higher frequency (f>1 Hz) ground motions, and homogenize radiation-pattern effects in this same bandwidth, which move the simulations closer to the statistical characteristics of observed motions as illustrated by comparison with recordings from the 1979 Imperial Valley earthquake. JF - Bulletin of the Seismological Society of America AU - Graves, Robert AU - Pitarka, Arben Y1 - 2016/08/23/ PY - 2016 DA - 2016 Aug 23 SP - 2136 EP - 2153 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 5 SN - 0037-1106, 0037-1106 KW - United States KW - P-waves KW - body waves KW - technology KW - three-dimensional models KW - statistical analysis KW - prediction KW - elastic waves KW - effects KW - simulation KW - Imperial Valley earthquake 1979 KW - case studies KW - California KW - kinematics KW - attenuation KW - stochastic processes KW - ground motion KW - propagation KW - seismic waves KW - algorithms KW - earthquakes KW - S-waves KW - faults KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846860?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Kinematic+ground-motion+simulations+on+rough+faults+including+effects+of+3D+stochastic+velocity+perturbations&rft.au=Graves%2C+Robert%3BPitarka%2C+Arben&rft.aulast=Graves&rft.aufirst=Robert&rft.date=2016-08-23&rft.volume=106&rft.issue=5&rft.spage=2136&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120160088 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 - 64 N1 - PubXState - CA N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; attenuation; body waves; California; case studies; earthquakes; effects; elastic waves; faults; ground motion; Imperial Valley earthquake 1979; kinematics; P-waves; prediction; propagation; S-waves; seismic waves; simulation; statistical analysis; stochastic processes; technology; three-dimensional models; United States DO - http://dx.doi.org/10.1785/0120160088 ER - TY - JOUR T1 - 2D variations in coda amplitudes in the Middle East AN - 1828846190; 2016-087260 AB - Coda amplitudes have proven to be a stable feature of seismograms, allowing one to reliably measure magnitudes for moderate-to-large (M > or = 3) earthquakes over broad regions. Because smaller (M < 3) earthquakes are only recorded at higher frequencies for which we find larger interstation scatter, amplitude and magnitude estimates for these events are more variable, regional, and path dependent. In this article, we investigate coda amplitude measurements in the Middle East for 2D variations in attenuation structure. One critical aspect of this effort is characterizing the propagation term to include scattering, which allows us to use amplitudes out to longer distances and later in the coda. We perform a tomographic inversion and find that the recovered attenuation structure is both very similar to the attenuation structure derived from direct phases and also reflective of the tectonic structure of the region. We then apply the 2D attenuation corrections to several hundred events in the region and find marked improvements to our magnitude estimates, as measured by interstation scattering, resulting in standard deviations of less than 0.025 magnitude units at all frequencies. The improvements are greatest at high frequencies, which will have the largest effect on smaller magnitude events. JF - Bulletin of the Seismological Society of America AU - Pasyanos, Michael E AU - Goek, Rengin AU - Walter, William R Y1 - 2016/08/16/ PY - 2016 DA - 2016 Aug 16 SP - 1915 EP - 1925 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 5 SN - 0037-1106, 0037-1106 KW - guided waves KW - magnitude KW - coda waves KW - elastic waves KW - variations KW - two-dimensional models KW - attenuation KW - surface waves KW - seismicity KW - propagation KW - seismic waves KW - algorithms KW - Asia KW - earthquakes KW - Middle East KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846190?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=2D+variations+in+coda+amplitudes+in+the+Middle+East&rft.au=Pasyanos%2C+Michael+E%3BGoek%2C+Rengin%3BWalter%2C+William+R&rft.aulast=Pasyanos&rft.aufirst=Michael&rft.date=2016-08-16&rft.volume=106&rft.issue=5&rft.spage=1915&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150336 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 - 17 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table, geol. sketch map N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; amplitude; Asia; attenuation; coda waves; earthquakes; elastic waves; guided waves; magnitude; Middle East; propagation; seismic waves; seismicity; surface waves; two-dimensional models; variations DO - http://dx.doi.org/10.1785/0120150336 ER - TY - JOUR T1 - A new approach to cosmogenic corrections in (super 40) Ar/ (super 39) Ar chronometry; implications for the ages of Martian meteorites AN - 1812216756; 2016-069280 AB - Anomalously old (super 40) Ar/ (super 39) Ar ages are commonly obtained from Shergottites and are generally attributed to uncertainties regarding the isotopic composition of the trapped component and/or the presence of excess (super 40) Ar. Old ages can also be obtained if inaccurate corrections for cosmogenic (super 36) Ar are applied. Current methods for making the cosmogenic correction require simplifying assumptions regarding the spatial homogeneity of target elements for cosmogenic production and the distribution of cosmogenic nuclides relative to trapped and reactor-derived Ar isotopes. To mitigate uncertainties arising from these assumptions, a new cosmogenic correction approach utilizing the exposure age determined on an un-irradiated aliquot and step-wise production rate estimates that account for spatial variations in Ca and K is described. Data obtained from NWA 4468 and an unofficial pairing of NWA 2975, which yield anomalously old ages when corrected for cosmogenic (super 36) Ar using conventional techniques, are used to illustrate the efficacy of this new approach. For these samples, anomalous age determinations are rectified solely by the improved cosmogenic correction technique described herein. Ages of 188 + or - 17 and 184 + or - 17 Ma are obtained for NWA 4468 and NWA 2975, respectively, both of which are indistinguishable from ages obtained by other radioisotopic systems. For other Shergottites that have multiple trapped components, have experienced diffusive loss of Ar, or contain excess Ar, more accurate cosmogenic corrections may aid in the interpretation of anomalous ages. The trapped (super 40) Ar/ (super 36) Ar ratios inferred from inverse isochron diagrams obtained from NWA 4468 and NWA 2975 are significantly lower than the Martian atmospheric value, and may represent upper mantle or crustal components. JF - Geochimica et Cosmochimica Acta AU - Cassata, W S AU - Borg, L E Y1 - 2016/08/15/ PY - 2016 DA - 2016 Aug 15 SP - 279 EP - 293 PB - Elsevier, New York, NY VL - 187 SN - 0016-7037, 0016-7037 KW - NWA 4468 KW - Northwest Africa Meteorites KW - stony meteorites KW - isotopes KW - Martian meteorites KW - Mars KW - electron probe data KW - SNC Meteorites KW - meteorites KW - dates KW - noble gases KW - absolute age KW - Archean KW - rare earths KW - geochemistry KW - Ar/Ar KW - experimental studies KW - Precambrian KW - Jurassic KW - cosmochemistry KW - achondrites KW - Mesozoic KW - argon KW - terrestrial planets KW - planets KW - shergottite KW - Sm/Nd KW - metals KW - mathematical methods KW - corrections KW - NWA 2975 KW - 05B:Petrology of meteorites and tektites KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812216756?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+new+approach+to+cosmogenic+corrections+in+%28super+40%29+Ar%2F+%28super+39%29+Ar+chronometry%3B+implications+for+the+ages+of+Martian+meteorites&rft.au=Cassata%2C+W+S%3BBorg%2C+L+E&rft.aulast=Cassata&rft.aufirst=W&rft.date=2016-08-15&rft.volume=187&rft.issue=&rft.spage=279&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2016.04.045 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 - 51 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-08-18 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; Ar/Ar; Archean; argon; corrections; cosmochemistry; dates; electron probe data; experimental studies; geochemistry; isotopes; Jurassic; Mars; Martian meteorites; mathematical methods; Mesozoic; metals; meteorites; noble gases; Northwest Africa Meteorites; NWA 2975; NWA 4468; planets; Precambrian; rare earths; shergottite; Sm/Nd; SNC Meteorites; stony meteorites; terrestrial planets DO - http://dx.doi.org/10.1016/j.gca.2016.04.045 ER - TY - JOUR T1 - Molecular evidence of viral DNA in non-small cell lung cancer and non-neoplastic lung. AN - 1810869974; 27415011 AB - BACKGROUNDAlthough ∼20% of human cancers are caused by microorganisms, only suspicion exists for a microbial cause of lung cancer. Potential infectious agents were investigated in non-small cell lung cancer (NSCLC) and non-neoplastic lung.METHODSSeventy NSCLC tumours (33 squamous cell carcinomas, 17 adenocarcinomas, 10 adenocarcinomas with lepidic spread, and 10 oligometastases) and 10 non-neoplastic lung specimens were evaluated for molecular evidence of microorganisms. Tissues were subjected to the Lawrence Livermore Microbial Detection Array, an oncovirus panel of the International Agency for Research on Cancer, and human papillomavirus (HPV) genotyping. Associations were examined between microbial prevalence, clinical characteristics, and p16 and EGFR expression.RESULTSRetroviral DNA was observed in 85% squamous cell carcinomas, 47% adenocarcinomas, and 10% adenocarcinomas with lepidic spread. Human papillomavirus DNA was found in 69% of squamous cell carcinomas with 30% containing high-risk HPV types. No significant viral DNA was detected in non-neoplastic lung. Patients with tumours containing viral DNA experienced improved long-term survival compared with patients with viral DNA-negative tumours.CONCLUSIONSMost squamous cell carcinomas and adenocarcinomas contained retroviral DNA and one-third of squamous cell carcinomas contained high-risk HPV DNA. Viral DNA was absent in non-neoplastic lung. Trial results encourage further study of the viral contribution to lung carcinogenesis. JF - British journal of cancer AU - Robinson, Lary A AU - Jaing, Crystal J AU - Pierce Campbell, Christine AU - Magliocco, Anthony AU - Xiong, Yin AU - Magliocco, Genevra AU - Thissen, James B AU - Antonia, Scott AD - Department of Thoracic Oncology, Moffitt Cancer Center, Tampa, Florida 33612-9416, USA. ; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94559-9698, USA. ; Center for Infection Research in Cancer (CIRC), Moffitt Cancer Center, Tampa, Florida 33612-9416, USA. ; Department of Pathology, Moffitt Cancer Center, Tampa, Florida 33612-9416, USA. Y1 - 2016/08/09/ PY - 2016 DA - 2016 Aug 09 SP - 497 EP - 504 VL - 115 IS - 4 KW - Index Medicus UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1810869974?accountid=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=British+journal+of+cancer&rft.atitle=Molecular+evidence+of+viral+DNA+in+non-small+cell+lung+cancer+and+non-neoplastic+lung.&rft.au=Robinson%2C+Lary+A%3BJaing%2C+Crystal+J%3BPierce+Campbell%2C+Christine%3BMagliocco%2C+Anthony%3BXiong%2C+Yin%3BMagliocco%2C+Genevra%3BThissen%2C+James+B%3BAntonia%2C+Scott&rft.aulast=Robinson&rft.aufirst=Lary&rft.date=2016-08-09&rft.volume=115&rft.issue=4&rft.spage=497&rft.isbn=&rft.btitle=&rft.title=British+journal+of+cancer&rft.issn=1532-1827&rft_id=info:doi/10.1038%2Fbjc.2016.213 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-08-10 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/bjc.2016.213 ER - TY - JOUR T1 - Strong regional atmospheric super(14)C signature of respired CO sub(2) observed from a tall tower over the midwestern United States AN - 1827911765; PQ0003654051 AB - Radiocarbon in CO sub(2) ( super(14)CO sub(2)) measurements can aid in discriminating between fast (5-10years) cycling of C between the atmosphere and the terrestrial biosphere due to the super(14)C disequilibrium between atmospheric and terrestrial C. However, super(14)CO sub(2) in the atmosphere is typically much more strongly impacted by fossil fuel emissions of CO sub(2), and, thus, observations often provide little additional constraints on respiratory flux estimates at regional scales. Here we describe a data set of super(14)CO sub(2) observations from a tall tower in northern Wisconsin (USA) where fossil fuel influence is far enough removed that during the summer months, the biospheric component of the super(14)CO sub(2) budget dominates. We find that the terrestrial biosphere is responsible for a significant contribution to super(14)CO sub(2) that is 2-3 times higher than predicted by the Carnegie-Ames-Stanford approach terrestrial ecosystem model for observations made in 2010. This likely includes a substantial contribution from the North American boreal ecoregion, but transported biospheric emissions from outside the model domain cannot be ruled out. The super(14)CO sub(2) enhancement also appears somewhat decreased in observations made over subsequent years, suggesting that 2010 may be anomalous. With these caveats acknowledged, we discuss the implications of the observation/model comparison in terms of possible systematic biases in the model versus short-term anomalies in the observations. Going forward, this isotopic signal could be exploited as an important indicator to better constrain both the long-term carbon balance of terrestrial ecosystems and the short-term impact of disturbance-based loss of carbon to the atmosphere. Key Points * The terrestrial biosphere strongly influences atmospheric super(14)CO sub(2) over northern Wisconsin, USA * Simulations for the 2010 growing season results in an underestimate of the biospheric super(14)CO sub(2) source compared to observations * An underestimate in the magnitude of heterotrophic respiration flux in the model or short-term ecosystem variability is suspected JF - Journal of Geophysical Research. G. Biogeosciences AU - LaFranchi, B W AU - McFarlane, K J AU - Miller, J B AU - Lehman, S J AU - Phillips, CL AU - Andrews, A E AU - Tans, P P AU - Chen, H AU - Liu, Z AU - Turnbull, J C AU - Xu, X AU - Guilderson, T P AD - Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA, USA. Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 2275 EP - 2295 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 121 IS - 8 SN - 2169-8953, 2169-8953 KW - Ecology Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Variability KW - Ecosystems KW - Respiration KW - Indicators KW - Biosphere KW - USA, Wisconsin KW - Atmosphere KW - Carbon KW - Modelling KW - Data processing KW - Fossil fuels KW - Simulation Analysis KW - Carbon 14 KW - Carbon cycle KW - Ecosystem disturbance KW - Terrestrial ecosystems KW - Carbon dioxide KW - Fluctuations KW - Metabolism KW - Carbon Dioxide KW - Q2 09267:Gravity and geodesy KW - SW 0810:General KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1827911765?accountid=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=Strong+regional+atmospheric+super%2814%29C+signature+of+respired+CO+sub%282%29+observed+from+a+tall+tower+over+the+midwestern+United+States&rft.au=LaFranchi%2C+B+W%3BMcFarlane%2C+K+J%3BMiller%2C+J+B%3BLehman%2C+S+J%3BPhillips%2C+CL%3BAndrews%2C+A+E%3BTans%2C+P+P%3BChen%2C+H%3BLiu%2C+Z%3BTurnbull%2C+J+C%3BXu%2C+X%3BGuilderson%2C+T+P&rft.aulast=LaFranchi&rft.aufirst=B&rft.date=2016-08-01&rft.volume=121&rft.issue=8&rft.spage=2275&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research.+G.+Biogeosciences&rft.issn=21698953&rft_id=info:doi/10.1002%2F2015JG003271 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Carbon; Fossil fuels; Respiration; Carbon cycle; Carbon 14; Carbon dioxide; Metabolism; Ecosystem disturbance; Modelling; Data processing; Terrestrial ecosystems; Biosphere; Atmosphere; Variability; Ecosystems; Simulation Analysis; Indicators; Fluctuations; Carbon Dioxide; USA, Wisconsin DO - http://dx.doi.org/10.1002/2015JG003271 ER - TY - JOUR T1 - Constraining the low-cloud optical depth feedback at middle and high latitudes using satellite observations AN - 1827896600; PQ0003655444 AB - The increase in cloud optical depth with warming at middle and high latitudes is a robust cloud feedback response found across all climate models. This study builds on results that suggest the optical depth response to temperature is timescale invariant for low-level clouds. The timescale invariance allows one to use satellite observations to constrain the models' optical depth feedbacks. Three passive-sensor satellite retrievals are compared against simulations from eight models from the Atmosphere Model Intercomparison Project (AMIP) of the 5th Coupled Model Intercomparison Project (CMIP5). This study confirms that the low-cloud optical depth response is timescale invariant in the AMIP simulations, generally at latitudes higher than 40 degree . Compared to satellite estimates, most models overestimate the increase in optical depth with warming at the monthly and interannual timescales. Many models also do not capture the increase in optical depth with estimated inversion strength that is found in all three satellite observations and in previous studies. The discrepancy between models and satellites exists in both hemispheres and in most months of the year. A simple replacement of the models' optical depth sensitivities with the satellites' sensitivities reduces the negative shortwave cloud feedback by at least 50% in the 40 degree -70 degree S latitude band and by at least 65% in the 40 degree -70 degree N latitude band. Based on this analysis of satellite observations, we conclude that the low-cloud optical depth feedback at middle and high latitudes is likely too negative in climate models. Key Points * We examine low-cloud optical depth sensitivity to surface temperature and EIS * Compared to satellites, optical depth in models is too sensitive to temperature * Associated feedback in middle and high latitudes is likely too negative in models JF - Journal of Geophysical Research: Atmospheres AU - Terai, C R AU - Klein, SA AU - Zelinka, MD AD - Cloud Processes Research Group, Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 9696 EP - 9716 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 121 IS - 16 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Temperature effects KW - Surface temperatures KW - Climate models KW - Simulation Analysis KW - Climates KW - Climate KW - Temperature KW - Remote sensing KW - Atmosphere KW - Inversions KW - Project AMIP KW - Surface temperature KW - Clouds KW - Satellite sensing KW - Strength KW - Satellite data KW - Numerical simulations KW - Cloud optical depth KW - Modelling 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/1827896600?accountid=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=Constraining+the+low-cloud+optical+depth+feedback+at+middle+and+high+latitudes+using+satellite+observations&rft.au=Terai%2C+C+R%3BKlein%2C+SA%3BZelinka%2C+MD&rft.aulast=Terai&rft.aufirst=C&rft.date=2016-08-01&rft.volume=121&rft.issue=16&rft.spage=9696&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2016JD025233 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Temperature effects; Satellite sensing; Climate; Remote sensing; Inversions; Surface temperature; Modelling; Clouds; Surface temperatures; Satellite data; Climate models; Numerical simulations; Cloud optical depth; Project AMIP; Strength; Simulation Analysis; Climates; Temperature; Atmosphere DO - http://dx.doi.org/10.1002/2016JD025233 ER - TY - JOUR T1 - Ground Motion Modeling in the Eastern Caucasus AN - 1815699251; PQ0003588704 AB - In this study, we analyzed the performance of a preliminary three-dimensional (3D) velocity model of the Eastern Caucasus covering most of the Azerbaijan. The model was developed in support to long-period ground motion simulations and seismic hazard assessment from regional earthquakes in Azerbaijan. The model's performance was investigated by simulating ground motion from the damaging Mw 5.9, 2012 Zaqatala earthquake, which was well recorded throughout the region by broadband seismic instruments. In our simulations, we use a parallelized finite-difference method of fourth-order accuracy. The comparison between the simulated and recorded ground motion velocity in the modeled period range of 3-20 s shows that in general, the 3D velocity model performs well. Areas in which the model needs improvements are located mainly in the central part of the Kura basin and in the Caspian Sea coastal areas. Comparisons of simulated ground motion using our 3D velocity model and corresponding 1D regional velocity model were used to locate areas with strong 3D wave propagation effects. In areas with complex underground structure, the 1D model fails to produce the observed ground motion amplitude and duration, and spatial extend of ground motion amplification caused by wave propagation effects. JF - Pure and Applied Geophysics AU - Pitarka, Arben AU - Gok, Rengin AU - Yetirmishli, Gurban AU - Ismayilova, Saida AU - Mellors, Robert AD - Lawrence Livermore National Laboratory, Livermore, USA, pitarka1@llnl.gov Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 2791 EP - 2801 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 173 IS - 8 SN - 0033-4553, 0033-4553 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Earthquakes KW - Ground motion KW - Simulation Analysis KW - Eurasia, Caspian Sea KW - Velocity KW - Basins KW - Finite-difference methods KW - Wave propagation KW - Azerbaijan KW - Wave amplitude KW - Methodology KW - Wave Propagation KW - Hazards KW - Underground Structures KW - Numerical simulations KW - Seismic instruments KW - Geophysics KW - Modelling KW - Hazard assessment KW - Q2 09262:Methods and instruments KW - SW 0810:General KW - M2 551.5:General (551.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815699251?accountid=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=Pure+and+Applied+Geophysics&rft.atitle=Ground+Motion+Modeling+in+the+Eastern+Caucasus&rft.au=Pitarka%2C+Arben%3BGok%2C+Rengin%3BYetirmishli%2C+Gurban%3BIsmayilova%2C+Saida%3BMellors%2C+Robert&rft.aulast=Pitarka&rft.aufirst=Arben&rft.date=2016-08-01&rft.volume=173&rft.issue=8&rft.spage=2791&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-016-1311-2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Earthquakes; Ground motion; Geophysics; Wave propagation; Wave amplitude; Hazard assessment; Methodology; Modelling; Numerical simulations; Seismic instruments; Finite-difference methods; Hazards; Wave Propagation; Underground Structures; Simulation Analysis; Basins; Velocity; Eurasia, Caspian Sea; Azerbaijan DO - http://dx.doi.org/10.1007/s00024-016-1311-2 ER - TY - JOUR T1 - Reducing disk storage of full-3D seismic waveform tomography (F3DT) through lossy online compression AN - 1815675182; 2016-074433 AB - Full-3D seismic waveform tomography (F3DT) is the latest seismic tomography technique that can assimilate broadband, multi-component seismic waveform observations into high-resolution 3D subsurface seismic structure models. The main drawback in the current F3DT implementation, in particular the scattering-integral implementation (F3DT-SI), is the high disk storage cost and the associated I/O overhead of archiving the 4D space-time wavefields of the receiver- or source-side strain tensors. The strain tensor fields are needed for computing the data sensitivity kernels, which are used for constructing the Jacobian matrix in the Gauss-Newton optimization algorithm. In this study, we have successfully integrated a lossy compression algorithm into our F3DT-SI workflow to significantly reduce the disk space for storing the strain tensor fields. The compressor supports a user-specified tolerance for bounding the error, and can be integrated into our finite-difference wave-propagation simulation code used for computing the strain fields. The decompressor can be integrated into the kernel calculation code that reads the strain fields from the disk and compute the data sensitivity kernels. During the wave-propagation simulations, we compress the strain fields before writing them to the disk. To compute the data sensitivity kernels, we read the compressed strain fields from the disk and decompress them before using them in kernel calculations. Experiments using a realistic dataset in our California statewide F3DT project have shown that we can reduce the strain-field disk storage by at least an order of magnitude with acceptable loss, and also improve the overall I/O performance of the entire F3DT-SI workflow significantly. The integration of the lossy online compressor may potentially open up the possibilities of the wide adoption of F3DT-SI in routine seismic tomography practices in the near future. JF - Computers & Geosciences AU - Lindstrom, Peter AU - Chen, Po AU - Lee, En-Jui Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 45 EP - 54 PB - Elsevier, Amsterdam VL - 93 SN - 0098-3004, 0098-3004 KW - United States KW - tomography KW - digital data KW - data processing KW - elastic waves KW - waveforms KW - simulation KW - California KW - errors KW - propagation KW - algorithms KW - compression KW - body waves KW - three-dimensional models KW - statistical analysis KW - geophysical methods KW - optimization KW - inverse problem KW - correlation KW - wave fields KW - seismic methods KW - models KW - lossy compression KW - Southern California KW - kernels KW - mathematical methods KW - seismic waves KW - data storage KW - S-waves KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815675182?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reducing+disk+storage+of+full-3D+seismic+waveform+tomography+%28F3DT%29+through+lossy+online+compression&rft.au=Lindstrom%2C+Peter%3BChen%2C+Po%3BLee%2C+En-Jui&rft.aulast=Lindstrom&rft.aufirst=Peter&rft.date=2016-08-01&rft.volume=93&rft.issue=&rft.spage=45&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Geosciences&rft.issn=00983004&rft_id=info:doi/10.1016%2Fj.cageo.2016.04.009 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 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 44 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2016-09-01 N1 - CODEN - GGEOD5 N1 - SubjectsTermNotLitGenreText - algorithms; body waves; California; compression; correlation; data processing; data storage; digital data; elastic waves; errors; geophysical methods; inverse problem; kernels; lossy compression; mathematical methods; models; optimization; propagation; S-waves; seismic methods; seismic waves; simulation; Southern California; statistical analysis; three-dimensional models; tomography; United States; wave fields; waveforms DO - http://dx.doi.org/10.1016/j.cageo.2016.04.009 ER - TY - JOUR T1 - Oxygen isotopic variations in the outer margins and Wark-Lovering rims of refractory inclusions AN - 1812216551; 2016-069261 AB - Oxygen isotopic variations across the outer margins and Wark-Lovering (WL) rims of a diverse suite of six coarse-grained Types A and B refractory inclusions from both oxidized and reduced CV3 chondrites suggest that CAIs originated from a (super 16) O-rich protosolar gas reservoir and were later exposed to both relatively (super 17,18) O-rich and (super 16) O-rich reservoirs. The O-isotope profiles of CAIs can be explained by changes in the composition of gas near the protoSun or the migration of CAIs through a heterogeneous nebula. Variability within the inclusion interiors appears to have been set prior to WL rim growth. Modeling the isotopic zoning profiles as diffusion gradients between inclusion interiors and edges establishes a range of permissible time-temperature combinations for their exposure in the nebula. At mean temperatures of 1400 K, models that match the isotope gradients in the inclusions yield timescales ranging from 5 X 10 (super 3) to 3 X 10 (super 5) years. Assuming CAIs originated with a relatively (super 16) O-rich (protosolar) isotopic composition, differences among the melilite interiors and the isotopic gradients in their margins imply the existence of a number of isotopically distinct reservoirs. Evidence at the edges of some CAIs for subsequent isotopic exchange may relate to the beginning of rim formation. In the WL rim layers surrounding the interiors, spinel is relatively (super 16) O-rich but subtly distinct among different CAIs. Melilite is often relatively (super 16) O-poor, but rare relatively (super 16) O-rich grains also exist. Pyroxene generally exhibits intermediate O-isotope compositions and isotopic zoning. Olivine in both WL and accretionary rims, when present, is isotopically heterogeneous. The extreme isotopic heterogeneity among and within individual WL rim layers and in particular, the observed trends of outward (super 16) O-enrichments, suggest that rims surrounding CAIs contained in CV3 chondrites, like the inclusions themselves, formed from a number of isotopically distinct gas reservoirs. Collectively, these results support numerical protoplanetary disk models in which CAIs were transported between several distinct nebular reservoirs multiple times prior to accretion onto a parent body. JF - Geochimica et Cosmochimica Acta AU - Simon, Justin I AU - Matzel, Jennifer E P AU - Simon, Steven B AU - Hutcheon, Ian D AU - Ross, D Kent AU - Weber, Peter K AU - Grossman, Lawrence Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 242 EP - 276 PB - Elsevier, New York, NY VL - 186 SN - 0016-7037, 0016-7037 KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - refractory materials KW - calcium-aluminum inclusions KW - mass spectra KW - CV chondrites KW - stable isotopes KW - variations KW - temperature KW - electron probe data KW - meteorites KW - Wark-Lovering rims KW - inclusions KW - spectra KW - mineral assemblages KW - chondrites KW - P-T conditions KW - solar system KW - isotope ratios KW - statistical analysis KW - electron microscopy data KW - O-18/O-16 KW - carbonaceous chondrites KW - terrestrial planets KW - reaction rims KW - models KW - mineral inclusions KW - planets KW - mathematical methods KW - NanoSIMS KW - temporal distribution KW - crystal chemistry KW - SEM data KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812216551?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Oxygen+isotopic+variations+in+the+outer+margins+and+Wark-Lovering+rims+of+refractory+inclusions&rft.au=Simon%2C+Justin+I%3BMatzel%2C+Jennifer+E+P%3BSimon%2C+Steven+B%3BHutcheon%2C+Ian+D%3BRoss%2C+D+Kent%3BWeber%2C+Peter+K%3BGrossman%2C+Lawrence&rft.aulast=Simon&rft.aufirst=Justin&rft.date=2016-08-01&rft.volume=186&rft.issue=&rft.spage=242&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2016.04.025 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 - 87 N1 - PubXState - NY N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-08-18 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - calcium-aluminum inclusions; carbonaceous chondrites; chondrites; crystal chemistry; CV chondrites; electron microscopy data; electron probe data; inclusions; ion probe data; isotope ratios; isotopes; mass spectra; mathematical methods; meteorites; mineral assemblages; mineral inclusions; models; NanoSIMS; O-18/O-16; oxygen; P-T conditions; planets; reaction rims; refractory materials; SEM data; solar system; spectra; stable isotopes; statistical analysis; stony meteorites; temperature; temporal distribution; terrestrial planets; variations; Wark-Lovering rims DO - http://dx.doi.org/10.1016/j.gca.2016.04.025 ER - TY - JOUR T1 - Generation of shear motion from an isotropic explosion source by scattering in heterogeneous media AN - 1828846233; 2016-087244 AB - One challenging task in explosion seismology is the development of physical models for explaining the generation of S waves during underground explosions. Recent analysis of ground motion from chemical explosions during the Source Physics Experiment (Pitarka et al., 2015) suggests that, although a large component of shear motion was generated directly at the source, additional scattering from heterogeneous velocity structure and topography is necessary to better match the recorded data. In our study, we used a stochastic representation of small-scale velocity variability to produce high-frequency scattering and to analyze its implication on shear-motion generation during underground explosions. In our stochastic velocity model, the key parameters that affect scattering are the correlation length and the relative amplitude of velocity perturbations. Based on finite-difference simulations of elastic wave propagation from an isotropic explosion source, we find that higher velocity perturbations result in larger shear motion, whereas the correlation length, which controls the scatterers size, affects the frequency range at which relative transverse motion is larger. JF - Bulletin of the Seismological Society of America AU - Hirakawa, Evan AU - Pitarka, Arben AU - Mellors, Robert Y1 - 2016/07/19/ PY - 2016 DA - 2016 Jul 19 SP - 2313 EP - 2319 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 5 SN - 0037-1106, 0037-1106 KW - United States KW - P-waves KW - body waves KW - technology KW - explosions KW - finite difference analysis KW - chemical explosions KW - elastic waves KW - seismic sources KW - depth KW - models KW - Nevada Test Site KW - cracks KW - stochastic processes KW - ground motion KW - propagation KW - seismic waves KW - earthquakes KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846233?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Generation+of+shear+motion+from+an+isotropic+explosion+source+by+scattering+in+heterogeneous+media&rft.au=Hirakawa%2C+Evan%3BPitarka%2C+Arben%3BMellors%2C+Robert&rft.aulast=Hirakawa&rft.aufirst=Evan&rft.date=2016-07-19&rft.volume=106&rft.issue=5&rft.spage=2313&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150243 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 - 42 N1 - PubXState - CA N1 - Document feature - illus. N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - body waves; chemical explosions; cracks; depth; earthquakes; elastic waves; explosions; finite difference analysis; ground motion; models; Nevada; Nevada Test Site; P-waves; propagation; seismic sources; seismic waves; stochastic processes; technology; United States DO - http://dx.doi.org/10.1785/0120150243 ER - TY - JOUR T1 - Waveform inversion of acoustic waves for explosion yield estimation AN - 1869032659; 2017-010879 AB - We present a new waveform inversion technique to estimate the energy of near-surface explosions using atmospheric acoustic waves. Conventional methods often employ air blast models based on a homogeneous atmosphere, where the acoustic wave propagation effects (e.g., refraction and diffraction) are not taken into account, and therefore, their accuracy decreases with increasing source-receiver distance. In this study, three-dimensional acoustic simulations are performed with a finite difference method in realistic atmospheres and topography, and the modeled acoustic Green's functions are incorporated into the waveform inversion for the acoustic source time functions. The strength of the acoustic source is related to explosion yield based on a standard air blast model. The technique was applied to local explosions (<10 km) and provided reasonable yield estimates (< approximately 30% error) in the presence of realistic topography and atmospheric structure. The presented method can be extended to explosions recorded at far distance provided proper meteorological specifications. 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 - Kim, K AU - Rodgers, A Y1 - 2016/07/16/ PY - 2016 DA - 2016 Jul 16 SP - 6883 EP - 6890 PB - American Geophysical Union, Washington, DC VL - 43 IS - 13 SN - 0094-8276, 0094-8276 KW - San Andreas Mountains KW - explosions KW - inverse problem KW - Green function KW - waveforms KW - refraction KW - relief KW - diffraction KW - models KW - topography KW - White sands Missile Range KW - mathematical methods KW - propagation KW - meteorology KW - accuracy KW - acoustical waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869032659?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Waveform+inversion+of+acoustic+waves+for+explosion+yield+estimation&rft.au=Kim%2C+K%3BRodgers%2C+A&rft.aulast=Kim&rft.aufirst=K&rft.date=2016-07-16&rft.volume=43&rft.issue=13&rft.spage=6883&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2016GL069624 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 - 20 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2017-02-17 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - accuracy; acoustical waves; diffraction; explosions; Green function; inverse problem; mathematical methods; meteorology; models; propagation; refraction; relief; San Andreas Mountains; topography; waveforms; White sands Missile Range DO - http://dx.doi.org/10.1002/2016GL069624 ER - TY - JOUR T1 - Bayesian nitrate source apportionment to individual groundwater wells in the Central Valley by use of elemental and isotopic tracers AN - 1844922405; 2016-101585 AB - Groundwater quality is a concern in alluvial aquifers that underlie agricultural areas, such as in the San Joaquin Valley of California. Shallow domestic wells (less than 150 m deep) in agricultural areas are often contaminated by nitrate. Agricultural and rural nitrate sources include dairy manure, synthetic fertilizers, and septic waste. Knowledge of the relative proportion that each of these sources contributes to nitrate concentration in individual wells can aid future regulatory and land management decisions. We show that nitrogen and oxygen isotopes of nitrate, boron isotopes, and iodine concentrations are a useful, novel combination of groundwater tracers to differentiate between manure, fertilizers, septic waste, and natural sources of nitrate. Furthermore, in this work, we develop a new Bayesian mixing model in which these isotopic and elemental tracers were used to estimate the probability distribution of the fractional contributions of manure, fertilizers, septic waste, and natural sources to the nitrate concentration found in an individual well. The approach was applied to 56 nitrate-impacted private domestic wells located in the San Joaquin Valley. Model analysis found that some domestic wells were clearly dominated by the manure source and suggests evidence for majority contributions from either the septic or fertilizer source for other wells. But, predictions of fractional contributions for septic and fertilizer sources were often of similar magnitude, perhaps because modeled uncertainty about the fraction of each was large. For validation of the Bayesian model, fractional estimates were compared to surrounding land use and estimated source contributions were broadly consistent with nearby land use types. Abstract Copyright (2016), . The Authors. JF - Water Resources Research AU - Ransom, Katherine M AU - Grote, Mark N AU - Deinhart, Amanda AU - Eppich, Gary AU - Kendall, Carol AU - Sanborn, Matthew E AU - Souders, A Kate AU - Wimpenny, Joshua AU - Yin, Qing-zhu AU - Young, Megan AU - Harter, Thomas Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 5577 EP - 5597 PB - American Geophysical Union, Washington, DC VL - 52 IS - 7 SN - 0043-1397, 0043-1397 KW - United States KW - water quality KW - fertilizers KW - oxygen KW - isotopes KW - Bayesian analysis KW - stable isotopes KW - nitrogen KW - ground water KW - California KW - tracers KW - animal waste KW - nitrate ion KW - septic systems KW - N-15/N-14 KW - San Joaquin Valley KW - numerical models KW - isotope ratios KW - statistical analysis KW - agriculture KW - O-18/O-16 KW - Central Valley KW - B-11/B-10 KW - boron KW - water wells KW - 21:Hydrogeology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1844922405?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+nitrate+source+apportionment+to+individual+groundwater+wells+in+the+Central+Valley+by+use+of+elemental+and+isotopic+tracers&rft.au=Ransom%2C+Katherine+M%3BGrote%2C+Mark+N%3BDeinhart%2C+Amanda%3BEppich%2C+Gary%3BKendall%2C+Carol%3BSanborn%2C+Matthew+E%3BSouders%2C+A+Kate%3BWimpenny%2C+Joshua%3BYin%2C+Qing-zhu%3BYoung%2C+Megan%3BHarter%2C+Thomas&rft.aulast=Ransom&rft.aufirst=Katherine&rft.date=2016-07-01&rft.volume=52&rft.issue=7&rft.spage=5577&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR018523 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 - 80 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-12-01 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - agriculture; animal waste; B-11/B-10; Bayesian analysis; boron; California; Central Valley; fertilizers; ground water; isotope ratios; isotopes; N-15/N-14; nitrate ion; nitrogen; numerical models; O-18/O-16; oxygen; San Joaquin Valley; septic systems; stable isotopes; statistical analysis; tracers; United States; water quality; water wells DO - http://dx.doi.org/10.1002/2015WR018523 ER - TY - JOUR T1 - Assessment of marine boundary layer cloud simulations in the CAM with CLUBB and updated microphysics scheme based on ARM observations from the Azores AN - 1815700255; PQ0003593025 AB - To assess marine boundary layer (MBL) cloud simulations in three versions of the Community Atmosphere Model (CAM), three sets of short-term global hindcasts are performed and compared to Atmospheric Radiation Measurement Program (ARM) observations on Graciosa Island in the Azores from June 2009 to December 2010. The three versions consist of CAM5.3 with default schemes (CAM5.3), CAM5.3 with Cloud Layers Unified By Binormals (CLUBB-MG1), and CAM5.3 with CLUBB and updated microphysics scheme (CLUBB-MG2). Our results show that relative to CAM5.3 default schemes, simulations with CLUBB better represent MBL cloud base height, the height of the major cloud layer, and the daily cloud cover variability. CLUBB also better simulates the relationship of cloud fraction to cloud liquid water path (LWP) most likely due to CLUBB's consistent treatment of these variables through a probability distribution function (PDF) approach. Subcloud evaporation of precipitation is substantially enhanced in simulations with CLUBB-MG2 and is more realistic based on the limited observational estimate. Despite these improvements, all model versions underestimate MBL cloud cover. CLUBB-MG2 reduces biases in in-cloud LWP (clouds are not too bright) but there are still too few of MBL clouds due to an underestimate in the frequency of overcast scenes. Thus, combining CLUBB with MG2 scheme better simulates MBL cloud processes, but because biases remain in MBL cloud cover CLUBB-MG2 does not improve the simulation of the surface shortwave cloud radiative effect (CRE sub(SW)). Key Points * Three versions of CAM short-term hindcasts are performed and compared to ARM observations from the Azores * CAM5 with CLUBB and MG2 scheme (CLUBB-MG2) better simulates MBL cloud processes * CLUBB-MG2 does not improve the surface SW CRE mainly due to its MBL cloud cover biases JF - Journal of Geophysical Research: Atmospheres AU - Zheng, X AU - Klein, SA AU - Ma, H-Y AU - Bogenschutz, P AU - Gettelman, A AU - Larson, V E AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 8472 EP - 8492 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 121 IS - 14 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Atmospheric precipitations KW - Variability KW - Probability Distribution KW - Simulation Analysis KW - Evaporation KW - Atmospheric radiation measurements KW - Cloud Cover KW - Boundary Layers KW - Precipitation KW - Cloud cover KW - Clouds KW - ANE, Atlantic, Azores KW - Radiation KW - Numerical simulations KW - Marine atmospheric boundary layer KW - Boundary layers KW - Evaporation of precipitation KW - Downward long wave radiation KW - Modelling KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 0810:General KW - M2 556.13:Evaporation/Evapotranspiration (556.13) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815700255?accountid=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=Assessment+of+marine+boundary+layer+cloud+simulations+in+the+CAM+with+CLUBB+and+updated+microphysics+scheme+based+on+ARM+observations+from+the+Azores&rft.au=Zheng%2C+X%3BKlein%2C+SA%3BMa%2C+H-Y%3BBogenschutz%2C+P%3BGettelman%2C+A%3BLarson%2C+V+E&rft.aulast=Zheng&rft.aufirst=X&rft.date=2016-07-01&rft.volume=121&rft.issue=14&rft.spage=8472&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2016JD025274 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Atmospheric precipitations; Clouds; Boundary layers; Downward long wave radiation; Cloud cover; Modelling; Marine atmospheric boundary layer; Numerical simulations; Atmospheric radiation measurements; Evaporation of precipitation; Variability; Probability Distribution; Radiation; Evaporation; Simulation Analysis; Boundary Layers; Cloud Cover; Precipitation; ANE, Atlantic, Azores DO - http://dx.doi.org/10.1002/2016JD025274 ER - TY - JOUR T1 - Iterative strategies for aftershock classification in automatic seismic processing pipelines AN - 1815667831; 2016-076894 AB - Aftershock sequences following very large earthquakes present enormous challenges to near-real-time generation of seismic bulletins. The increase in analyst resources needed to relocate an inflated number of events is compounded by failures of phase-association algorithms and a significant deterioration in the quality of underlying, fully automatic event bulletins. Current processing pipelines were designed a generation ago, and, due to computational limitations of the time, are usually limited to single passes over the raw data. With current processing capability, multiple passes over the data are feasible. Processing the raw data at each station currently generates parametric data streams that are then scanned by a phase-association algorithm to form event hypotheses. We consider the scenario in which a large earthquake has occurred and propose to define a region of likely aftershock activity in which events are detected and accurately located, using a separate specially targeted semiautomatic process. This effort may focus on so-called pattern detectors, but here we demonstrate a more general grid-search algorithm that may cover wider source regions without requiring waveform similarity. Given many well-located aftershocks within our source region, we may remove all associated phases from the original detection lists prior to a new iteration of the phase-association algorithm. We provide a proof-of-concept example for the 2015 Gorkha sequence, Nepal, recorded on seismic arrays of the International Monitoring System. Even with very conservative conditions for defining event hypotheses within the aftershock source region, we can automatically remove about half of the original detections that could have been generated by Nepal earthquakes and reduce the likelihood of false associations and spurious event hypotheses. Further reductions in the number of detections in the parametric data streams are likely, using correlation and subspace detectors and/or empirical matched field processing. JF - Seismological Research Letters AU - Gibbons, Steven J AU - Kvaerna, Tormod AU - Harris, David B AU - Dodge, Douglas A Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 919 EP - 929 PB - Seismological Society of America, El Cerrito, CA VL - 87 IS - 4 SN - 0895-0695, 0895-0695 KW - Gorkha earthquake 2015 KW - information management KW - Nepal KW - data management KW - case studies KW - aftershocks KW - seismicity KW - Indian Peninsula KW - great earthquakes KW - classification KW - Asia KW - earthquakes KW - arrays KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815667831?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Iterative+strategies+for+aftershock+classification+in+automatic+seismic+processing+pipelines&rft.au=Gibbons%2C+Steven+J%3BKvaerna%2C+Tormod%3BHarris%2C+David+B%3BDodge%2C+Douglas+A&rft.aulast=Gibbons&rft.aufirst=Steven&rft.date=2016-07-01&rft.volume=87&rft.issue=4&rft.spage=919&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220160047 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 - 2016-01-01 N1 - Number of references - 36 N1 - PubXState - CA N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - aftershocks; arrays; Asia; case studies; classification; data management; earthquakes; Gorkha earthquake 2015; great earthquakes; Indian Peninsula; information management; Nepal; seismicity DO - http://dx.doi.org/10.1785/0220160047 ER - TY - JOUR T1 - Ultrafast proton transport in sub-1-nm diameter carbon nanotube porins AN - 1808682111; PQ0003392226 AB - Proton transport plays an important role in many biological processes due to the ability of protons to rapidly translocate along chains of hydrogen-bonded water molecules. Molecular dynamics simulations have predicted that confinement in hydrophobic nanochannels should enhance the rate of proton transport. Here, we show that 0.8-nm-diameter carbon nanotube porins, which promote the formation of one-dimensional water wires, can support proton transport rates exceeding those of bulk water by an order of magnitude. The transport rates in these narrow nanotube pores also exceed those of biological channels and Nafion. With larger 1.5-nm-diameter nanotube porins, proton transport rates comparable to bulk water are observed. We also show that the proton conductance of these channels can be modulated by the presence of Ca super(2+) ions. Our results illustrate the potential of small-diameter carbon nanotube porins as a proton conductor material and suggest that strong spatial confinement is a key factor in enabling efficient proton transport. JF - Nature Nanotechnology AU - Tunuguntla, Ramya H AU - Allen, Frances I AU - Kim, Kyunghoon AU - Belliveau, Allison AU - Noy, Aleksandr AD - Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 639 EP - 644 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 11 IS - 7 SN - 1748-3387, 1748-3387 KW - Biotechnology and Bioengineering Abstracts KW - Ions KW - Carbon KW - Calcium KW - Protons KW - Channel pores KW - Conductance KW - Porins KW - Hydrophobicity KW - Conductors KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808682111?accountid=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=Nature+Nanotechnology&rft.atitle=Ultrafast+proton+transport+in+sub-1-nm+diameter+carbon+nanotube+porins&rft.au=Tunuguntla%2C+Ramya+H%3BAllen%2C+Frances+I%3BKim%2C+Kyunghoon%3BBelliveau%2C+Allison%3BNoy%2C+Aleksandr&rft.aulast=Tunuguntla&rft.aufirst=Ramya&rft.date=2016-07-01&rft.volume=11&rft.issue=7&rft.spage=639&rft.isbn=&rft.btitle=&rft.title=Nature+Nanotechnology&rft.issn=17483387&rft_id=info:doi/10.1038%2Fnnano.2016.43 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Last updated - 2016-08-17 N1 - SubjectsTermNotLitGenreText - Ions; Calcium; Carbon; Conductance; Channel pores; Protons; Porins; Hydrophobicity; Conductors DO - http://dx.doi.org/10.1038/nnano.2016.43 ER - TY - JOUR T1 - A novel solid-state NMR method for the investigation of trivalent lanthanide sorption on amorphous silica at low surface loadings AN - 1808629140; PQ0003469527 AB - The modelling of radionuclide transport in the subsurface depends on a comprehensive understanding of their interactions with mineral surfaces. Spectroscopic techniques provide important insight into these processes directly, but at high concentrations are sometimes hindered by safety concerns and limited solubilities of many radionuclides, especially the actinides. Here we use Eu(iii) as a surrogate for trivalent actinide species, and study Eu(iii) sorption on the silica surface at pH 5 where sorption is fairly limited. We have applied a novel, surface selective solid-state nuclear magnetic resonance (NMR) technique to provide information about Eu binding at the silica surface at estimated surface loadings ranging from 0.1 to 3 nmol m-2 (<0.1% surface loading). The NMR results show that inner sphere Eu(iii) complexes are evenly distributed across the silica surface at all concentrations, but that at the highest surface loadings there are indications that precipitates may form. These results illustrate that this NMR technique may be applied in solubility-limited systems to differentiate between adsorption and precipitation to better understand the interactions of radionuclides at solid surfaces. JF - Environmental Sciences: Processes and Impacts AU - Mason, HE AU - Begg, J D AU - Maxwell, R S AU - Kersting, AB AU - Zavarin, M AD - Glenn T. Seaborg Institute; Physical and Life Sciences Directorate; Lawrence Livermore National Laboratory; 7000 East Ave.; Livermore; CA 94550; USA Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 802 EP - 809 PB - The Royal Society of Chemistry, Burlington House London W1J 0BA United Kingdom VL - 18 IS - 7 SN - 2050-7887, 2050-7887 KW - Toxicology Abstracts; Environment Abstracts KW - Sorption KW - Solubility KW - Safety KW - Precipitation KW - Actinides KW - Silica KW - Radioisotopes KW - Adsorption KW - Lanthanides KW - N.M.R. KW - NMR KW - pH effects KW - Minerals KW - pH KW - X 24390:Radioactive Materials KW - ENA 21:Wildlife UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808629140?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxicologyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Sciences%3A+Processes+and+Impacts&rft.atitle=A+novel+solid-state+NMR+method+for+the+investigation+of+trivalent+lanthanide+sorption+on+amorphous+silica+at+low+surface+loadings&rft.au=Mason%2C+HE%3BBegg%2C+J+D%3BMaxwell%2C+R+S%3BKersting%2C+AB%3BZavarin%2C+M&rft.aulast=Mason&rft.aufirst=HE&rft.date=2016-07-01&rft.volume=18&rft.issue=7&rft.spage=802&rft.isbn=&rft.btitle=&rft.title=Environmental+Sciences%3A+Processes+and+Impacts&rft.issn=20507887&rft_id=info:doi/10.1039%2Fc6em00082g LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Number of references - 33 N1 - Last updated - 2016-09-01 N1 - SubjectsTermNotLitGenreText - Sorption; Solubility; Silica; Adsorption; Radioisotopes; N.M.R.; Precipitation; Minerals; pH effects; Safety; Lanthanides; NMR; pH; Actinides DO - http://dx.doi.org/10.1039/c6em00082g ER - TY - JOUR T1 - Metrics for the Diurnal Cycle of Precipitation: Toward Routine Benchmarks for Climate Models AN - 1846409616; PQ0003820220 AB - Metrics are proposed-that is, a few summary statistics that condense large amounts of data from observations or model simulations-encapsulating the diurnal cycle of precipitation. Vector area averaging of Fourier amplitude and phase produces useful information in a reasonably small number of harmonic dial plots, a procedure familiar from atmospheric tide research. The metrics cover most of the globe but down-weight high-latitude wintertime ocean areas where baroclinic waves are most prominent. This enables intercomparison of a large number of climate models with observations and with each other. The diurnal cycle of precipitation has features not encountered in typical climate model intercomparisons, notably the absence of meaningful "average model" results that can be displayed in a single two-dimensional map. Displaying one map per model guides development of the metrics proposed here by making it clear that land and ocean areas must be averaged separately, but interpreting maps from all models becomes problematic as the size of a multimodel ensemble increases. Global diurnal metrics provide quick comparisons with observations and among models, using the most recent version of the Coupled Model Intercomparison Project (CMIP). This includes, for the first time in CMIP, spatial resolutions comparable to global satellite observations. Consistent with earlier studies of resolution versus parameterization of the diurnal cycle, the longstanding tendency of models to produce rainfall too early in the day persists in the high-resolution simulations, as expected if the error is due to subgrid-scale physics. JF - Journal of Climate AU - Covey, Curt AU - Gleckler, Peter J AU - Doutriaux, Charles AU - Williams, Dean N AU - Dai, Aiguo AU - Fasullo, John AU - Trenberth, Kevin AU - Berg, Alexis AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Livermore, California Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 4461 EP - 4471 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 29 IS - 12 SN - 0894-8755, 0894-8755 KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Remote Sensing KW - Statistics KW - Baroclinic waves KW - Waves KW - Hydrologic Data KW - Diurnal precipitation variations KW - Modelling KW - Atmospheric precipitations KW - Satellite Technology KW - Climate models KW - Simulation Analysis KW - Atmospheric tides KW - Climates KW - Climate KW - Vectors KW - Precipitation KW - Satellite data KW - Numerical simulations KW - Oceans KW - AQ 00001:Water Resources and Supplies KW - SW 0810:General KW - M2 551.581:Latitudinal Influences (551.581) KW - Q2 09105:Research programmes and expeditions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846409616?accountid=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=Metrics+for+the+Diurnal+Cycle+of+Precipitation%3A+Toward+Routine+Benchmarks+for+Climate+Models&rft.au=Covey%2C+Curt%3BGleckler%2C+Peter+J%3BDoutriaux%2C+Charles%3BWilliams%2C+Dean+N%3BDai%2C+Aiguo%3BFasullo%2C+John%3BTrenberth%2C+Kevin%3BBerg%2C+Alexis&rft.aulast=Covey&rft.aufirst=Curt&rft.date=2016-06-01&rft.volume=29&rft.issue=12&rft.spage=4461&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-15-0664.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Number of references - 32 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Atmospheric precipitations; Atmospheric tides; Climate; Vectors; Modelling; Satellite data; Climate models; Numerical simulations; Baroclinic waves; Precipitation; Diurnal precipitation variations; Remote Sensing; Satellite Technology; Statistics; Simulation Analysis; Oceans; Climates; Waves; Hydrologic Data DO - http://dx.doi.org/10.1175/JCLI-D-15-0664.1 ER - TY - JOUR T1 - Significantly improving regional seismic amplitude tomography at higher frequencies by determining S-wave bandwidth AN - 1824215289; 2016-083603 AB - Characterizing regional seismic signals continues to be a difficult problem due to their variability. Calibration of these signals is very important to many aspects of monitoring underground nuclear explosions, including detecting seismic signals, discriminating explosions from earthquakes, and reliably estimating magnitude and yield. Amplitude tomography, which simultaneously inverts for source, propagation, and site effects, is a leading method of calibrating these signals. A major issue in amplitude tomography is the data quality of the input amplitude measurements. Pre-event and prephase signal-to-noise ratio (SNR) tests are typically used but can frequently include bad signals and exclude good signals. The deficiencies of SNR criteria, which are demonstrated here, lead to large calibration errors. To ameliorate these issues, we introduce a semiautomated approach to assess the bandwidth of a spectrum where it behaves physically. We determine the maximum frequency (denoted as F (sub max) ) where it deviates from this behavior due to inflections at which noise or spurious signals start to bias the spectra away from the expected decay. We compare two amplitude tomography runs using the SNR and new F (sub max) criteria and show significant improvements to the stability and accuracy of the tomography output for frequency bands higher than 2 Hz by using our assessments of valid S-wave bandwidth. We compare Q estimates, P/S residuals, and some detailed results to explain the improvements. For frequency bands higher than 4 Hz, needed for effective P/S discrimination of explosions from earthquakes, the new bandwidth criteria sufficiently fix the instabilities and errors so that the residuals and calibration terms are useful for application. JF - Bulletin of the Seismological Society of America AU - Fisk, Mark D AU - Pasyanos, Michael E Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 928 EP - 942 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 3 SN - 0037-1106, 0037-1106 KW - tomography KW - Iran KW - Iranian Plateau KW - elastic waves KW - calibration KW - data management KW - surface waves KW - Love waves KW - seismicity KW - propagation KW - algorithms KW - nuclear explosions KW - Asia KW - Middle East KW - seismograms KW - body waves KW - monitoring KW - guided waves KW - explosions KW - magnitude KW - information management KW - signal-to-noise ratio KW - seismic waves KW - seismic networks KW - earthquakes KW - S-waves KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215289?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Significantly+improving+regional+seismic+amplitude+tomography+at+higher+frequencies+by+determining+S-wave+bandwidth&rft.au=Fisk%2C+Mark+D%3BPasyanos%2C+Michael+E&rft.aulast=Fisk&rft.aufirst=Mark&rft.date=2016-06-01&rft.volume=106&rft.issue=3&rft.spage=928&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150247 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 - 27 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table, geol. sketch map N1 - Last updated - 2016-09-29 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; amplitude; Asia; body waves; calibration; data management; earthquakes; elastic waves; explosions; guided waves; information management; Iran; Iranian Plateau; Love waves; magnitude; Middle East; monitoring; nuclear explosions; propagation; S-waves; seismic networks; seismic waves; seismicity; seismograms; signal-to-noise ratio; surface waves; tomography DO - http://dx.doi.org/10.1785/0120150247 ER - TY - JOUR T1 - Multifluid geo-energy systems: Using geologic CO sub(2) storage for geothermal energy production and grid-scale energy storage in sedimentary basins AN - 1808693362; PQ0003322937 AB - We present an approach that uses the huge fluid and thermal storage capacity of the subsurface, together with geologic carbon dioxide (CO sub(2)) storage, to harvest, store, and dispatch energy from subsurface (geothermal) and surface (solar, nuclear, fossil) thermal resources, as well as excess energy on electric grids. Captured CO sub(2) is injected into saline aquifers to store pressure, generate artesian flow of brine, and provide a supplemental working fluid for efficient heat extraction and power conversion. Concentric rings of injection and production wells create a hydraulic mound to store pressure, CO sub(2), and thermal energy. This energy storage can take excess power from the grid and excess and/or waste thermal energy and dispatch that energy when it is demanded, and thus enable higher penetration of variable renewable energy technologies (e.g., wind and solar). CO sub(2) stored in the subsurface functions as a cushion gas to provide enormous pressure storage capacity and displace large quantities of brine, some of which can be treated for a variety of beneficial uses. Geothermal power and energy-storage applications may generate enough revenues to compensate for CO sub(2) capture costs. While our approach can use nitrogen (N sub(2)), in addition to CO sub(2), as a supplemental fluid, and store thermal energy, this study focuses on using CO sub(2) for geothermal energy production and grid-scale energy storage. We conduct a techno-economic assessment to determine the levelized cost of electricity using this approach to generate geothermal power. We present a reservoir pressure management strategy that diverts a small portion of the produced brine for beneficial consumptive use to reduce the pumping cost of fluid recirculation, while reducing the risk of seismicity, caprock fracture, and CO sub(2) leakage. JF - Geosphere AU - Buscheck, Thomas A AU - Bielicki, Jeffrey M AU - Edmunds, Thomas A AU - Hao, Yue AU - Sun, Yunwei AU - Randolph, Jimmy B AU - Saar, Martin O AD - Atmospheric, Earth, and Energy Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, P.O. Box 808, L-223, Livermore, California 94550, USA Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 678 EP - 696 PB - Geological Society of America, 3300 Penrose Place Boulder CO 80301 United States VL - 12 IS - 3 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Geothermal power KW - Reservoir KW - Resource management KW - Geothermal energy KW - Electricity KW - Beneficial Use KW - Storage Capacity KW - Sedimentary basins KW - Storage KW - Costs KW - Assessments KW - Carbon dioxide KW - Electric Power Production KW - Geothermal Power KW - Environment management KW - Carbon Dioxide KW - Brines KW - Q2 09262:Methods and instruments KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808693362?accountid=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=Geosphere&rft.atitle=Multifluid+geo-energy+systems%3A+Using+geologic+CO+sub%282%29+storage+for+geothermal+energy+production+and+grid-scale+energy+storage+in+sedimentary+basins&rft.au=Buscheck%2C+Thomas+A%3BBielicki%2C+Jeffrey+M%3BEdmunds%2C+Thomas+A%3BHao%2C+Yue%3BSun%2C+Yunwei%3BRandolph%2C+Jimmy+B%3BSaar%2C+Martin+O&rft.aulast=Buscheck&rft.aufirst=Thomas&rft.date=2016-06-01&rft.volume=12&rft.issue=3&rft.spage=678&rft.isbn=&rft.btitle=&rft.title=Geosphere&rft.issn=1553-040X&rft_id=info:doi/10.1130%2FGES01207.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Number of references - 46 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Reservoir; Geothermal power; Resource management; Geothermal energy; Electricity; Carbon dioxide; Environment management; Sedimentary basins; Brines; Costs; Storage; Assessments; Beneficial Use; Geothermal Power; Storage Capacity; Electric Power Production; Carbon Dioxide DO - http://dx.doi.org/10.1130/GES01207.1 ER - TY - GEN T1 - These Tiny Capsules Fight Climate Change AN - 1792099674 JF - Breaking Energy AU - Anne M Stark | Senior Public Information Officer, Lawrence Livermore National Laboratory Y1 - 2016/05/27/ PY - 2016 DA - 2016 May 27 CY - New York PB - SyndiGate Media Inc KW - Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1792099674?accountid=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=These+Tiny+Capsules+Fight+Climate+Change&rft.au=Anne+M+Stark+%3B+Senior+Public+Information+Officer%2C+Lawrence+Livermore+National+Laboratory&rft.aulast=Anne+M+Stark+%7C+Senior+Public+Information+Officer&rft.aufirst=Lawrence+Livermore+National&rft.date=2016-05-27&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 - 2016-05-28 ER - TY - JOUR T1 - Thermally driven advection for radioxenon transport from an underground nuclear explosion AN - 1824212968; 2016-083095 AB - Barometric pumping is a ubiquitous process resulting in migration of gases in the subsurface that has been studied as the primary mechanism for noble gas transport from an underground nuclear explosion (UNE). However, at early times following a UNE, advection driven by explosion residual heat is relevant to noble gas transport. A rigorous measure is needed for demonstrating how, when, and where advection is important. In this paper three physical processes of uncertain magnitude (oscillatory advection, matrix diffusion, and thermally driven advection) are parameterized by using boundary conditions, system properties, and source term strength. Sobol' sensitivity analysis is conducted to evaluate the importance of all physical processes influencing the xenon signals. This study indicates that thermally driven advection plays a more important role in producing xenon signals than oscillatory advection and matrix diffusion at early times following a UNE, and xenon isotopic ratios are observed to have both time and spatial dependence. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Sun, Yunwei AU - Carrigan, Charles R Y1 - 2016/05/16/ PY - 2016 DA - 2016 May 16 SP - 4418 EP - 4425 PB - American Geophysical Union, Washington, DC VL - 43 IS - 9 SN - 0094-8276, 0094-8276 KW - United States KW - numerical models KW - underground space KW - isotopes KW - explosions KW - thermal properties KW - pumping KW - advection KW - xenon KW - gases KW - Nevada Test Site KW - Nevada National Security Site KW - physical properties KW - radioactive isotopes KW - transport KW - sensitivity analysis KW - noble gases KW - tracers KW - nuclear explosions KW - Nevada KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212968?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Thermally+driven+advection+for+radioxenon+transport+from+an+underground+nuclear+explosion&rft.au=Sun%2C+Yunwei%3BCarrigan%2C+Charles+R&rft.aulast=Sun&rft.aufirst=Yunwei&rft.date=2016-05-16&rft.volume=43&rft.issue=9&rft.spage=4418&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2016GL068290 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 - 25 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2016-09-29 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - advection; explosions; gases; isotopes; Nevada; Nevada National Security Site; Nevada Test Site; noble gases; nuclear explosions; numerical models; physical properties; pumping; radioactive isotopes; sensitivity analysis; thermal properties; tracers; transport; underground space; United States; xenon DO - http://dx.doi.org/10.1002/2016GL068290 ER - TY - JOUR T1 - Alteration of natural (super 37) Ar activity concentration in the subsurface by gas transport and water infiltration AN - 1832594812; 773475-13 AB - High (super 37) Ar activity concentration in soil gas is proposed as a key evidence for the detection of underground nuclear explosion by the Comprehensive Nuclear Test-Ban Treaty. However, such a detection is challenged by the natural background of (super 37) Ar in the subsurface, mainly due to Ca activation by cosmic rays. A better understanding and improved capability to predict (super 37) Ar activity concentration in the subsurface and its spatial and temporal variability is thus required. A numerical model integrating (super 37) Ar production and transport in the subsurface is developed, including variable soil water content and water infiltration at the surface. A parameterized equation for (super 37) Ar production in the first 15 m below the surface is studied, taking into account the major production reactions and the moderation effect of soil water content. Using sensitivity analysis and uncertainty quantification, a realistic and comprehensive probability distribution of natural (super 37) Ar activity concentrations in soil gas is proposed, including the effects of water infiltration. Site location and soil composition are identified as the parameters allowing for a most effective reduction of the possible range of (super 37) Ar activity concentrations. The influence of soil water content on (super 37) Ar production is shown to be negligible to first order, while (super 37) Ar activity concentration in soil gas and its temporal variability appear to be strongly influenced by transient water infiltration events. These results will be used as a basis for practical CTBTO concepts of operation during an OSI. Abstract Copyright (2016) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Guillon, Sophie AU - Sun, Yunwei AU - Purtschert, Roland AU - Raghoo, Lauren AU - Pili, Eric AU - Carrigan, Charles R Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 89 EP - 96 PB - Elsevier, Oxford VL - 155-156 SN - 0265-931X, 0265-931X KW - geologic hazards KW - underground space KW - isotopes KW - radioactivity KW - Ar-37 KW - ground water KW - radioactive fallout KW - radioactive isotopes KW - transport KW - sensitivity analysis KW - noble gases KW - movement KW - cosmic rays KW - nuclear explosions KW - water pollution KW - uncertainty KW - water KW - granulometry KW - soil profiles KW - numerical models KW - gaseous phase KW - explosions KW - pollutants KW - pollution KW - depth KW - argon KW - infiltration KW - mathematical methods KW - natural hazards KW - temporal distribution KW - mobilization KW - soil gases KW - Comprehensive Test Ban Treaty KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832594812?accountid=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+Environmental+Radioactivity&rft.atitle=Alteration+of+natural+%28super+37%29+Ar+activity+concentration+in+the+subsurface+by+gas+transport+and+water+infiltration&rft.au=Guillon%2C+Sophie%3BSun%2C+Yunwei%3BPurtschert%2C+Roland%3BRaghoo%2C+Lauren%3BPili%2C+Eric%3BCarrigan%2C+Charles+R&rft.aulast=Guillon&rft.aufirst=Sophie&rft.date=2016-05-01&rft.volume=155-156&rft.issue=&rft.spage=89&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2016.02.021 L2 - http://www.sciencedirect.com/science/journal/0265931X 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 - 30 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - Ar-37; argon; Comprehensive Test Ban Treaty; cosmic rays; depth; explosions; gaseous phase; geologic hazards; granulometry; ground water; infiltration; isotopes; mathematical methods; mobilization; movement; natural hazards; noble gases; nuclear explosions; numerical models; pollutants; pollution; radioactive fallout; radioactive isotopes; radioactivity; sensitivity analysis; soil gases; soil profiles; temporal distribution; transport; uncertainty; underground space; water; water pollution DO - http://dx.doi.org/10.1016/j.jenvrad.2016.02.021 ER - TY - JOUR T1 - Uncertainty quantification for discrimination of nuclear events as violations of the comprehensive nuclear Test Ban Treaty AN - 1832587329; 773475-18 AB - Enforcement of the Comprehensive Nuclear Test Ban Treaty (CTBT) will involve monitoring for radiologic indicators of underground nuclear explosions (UNEs). A UNE produces a variety of radioisotopes which then decay through connected radionuclide chains. A particular species of interest is xenon, namely the four isotopes (super 131m) Xe, (super 133m) Xe, (super 133) Xe, and (super 135) Xe. Due to their half lives, some of these isotopes can exist in the subsurface for more than 100 days. This convenient timescale, combined with modern detection capabilities, makes the xenon family a desirable candidate for UNE detection. Ratios of these isotopes as a function of time have been studied in the past for distinguishing nuclear explosions from civilian nuclear applications. However, the initial yields from UNEs have been treated as fixed values. In reality, these independent yields are uncertain to a large degree. This study quantifies the uncertainty in xenon ratios as a result of these uncertain initial conditions to better bound the values that xenon ratios can assume. We have successfully used a combination of analytical and sampling based statistical methods to reliably bound xenon isotopic ratios. We have also conducted a sensitivity analysis and found that xenon isotopic ratios are primarily sensitive to only a few of many uncertain initial conditions. Abstract Copyright (2016) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Sloan, Jamison AU - Sun, Yunwei AU - Carrigan, Charles Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 130 EP - 139 PB - Elsevier, Oxford VL - 155-156 SN - 0265-931X, 0265-931X KW - underground space KW - isotopes KW - explosions KW - radioactivity KW - pollutants KW - statistical analysis KW - pollution KW - radioactive decay KW - xenon KW - radioactive isotopes KW - chemical reactions KW - noble gases KW - mathematical methods KW - natural hazards KW - probability KW - nuclear explosions KW - fallout KW - uncertainty KW - Comprehensive Test Ban Treaty KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832587329?accountid=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+Environmental+Radioactivity&rft.atitle=Uncertainty+quantification+for+discrimination+of+nuclear+events+as+violations+of+the+comprehensive+nuclear+Test+Ban+Treaty&rft.au=Sloan%2C+Jamison%3BSun%2C+Yunwei%3BCarrigan%2C+Charles&rft.aulast=Sloan&rft.aufirst=Jamison&rft.date=2016-05-01&rft.volume=155-156&rft.issue=&rft.spage=130&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2016.02.022 L2 - http://www.sciencedirect.com/science/journal/0265931X 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 - 23 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - chemical reactions; Comprehensive Test Ban Treaty; explosions; fallout; isotopes; mathematical methods; natural hazards; noble gases; nuclear explosions; pollutants; pollution; probability; radioactive decay; radioactive isotopes; radioactivity; statistical analysis; uncertainty; underground space; xenon DO - http://dx.doi.org/10.1016/j.jenvrad.2016.02.022 ER - TY - JOUR T1 - Thermal drawdown-induced flow channeling in a single fracture in EGS AN - 1819894187; 2016-080245 AB - The evolution of flow pattern along a single fracture and its effects on heat production is a fundamental problem in the assessments of engineered geothermal systems (EGS). The channelized flow pattern associated with ubiquitous heterogeneity in fracture aperture distribution causes non-uniform temperature decrease in the rock body, which makes the flow increasingly concentrated into some preferential paths through the action of thermal stress. This mechanism may cause rapid heat production deterioration of EGS reservoirs. In this study, we investigated the effects of aperture heterogeneity on flow pattern evolution in a single fracture in a low-permeability crystalline formation. We developed a numerical model on the platform of GEOS to simulate the coupled thermo-hydro-mechanical processes in a penny-shaped fracture accessed via an injection well and a production well. We find that aperture heterogeneity generally exacerbates flow channeling and reservoir performance generally decreases with longer correlation length of aperture field. The expected production life is highly variable (5 years to beyond 30 years) when the aperture correlation length is longer than 1/5 of the well distance, whereas a heterogeneous fracture behaves similar to a homogeneous one when the correlation length is much shorter than the well distance. Besides, the mean production life decreases with greater aperture standard deviation only when the correlation length is relatively long. Although flow channeling is inevitable, initial aperture fields and well locations that enable tortuous preferential paths tend to deliver long heat production lives. Abstract Copyright (2016) Elsevier, B.V. JF - Geothermics AU - Guo, Bin AU - Fu, Pengcheng AU - Hao, Yue AU - Peters, Catherine A AU - Carrigan, Charles R Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 46 EP - 62 PB - Elsevier, Oxford-New York VL - 61 SN - 0375-6505, 0375-6505 KW - numerical models KW - statistical analysis KW - fluid flow KW - mathematical models KW - geothermal engineering KW - enhanced recovery KW - boundary conditions KW - geothermal energy KW - geothermal fields KW - fluid injection KW - drawdown KW - geothermal systems KW - crystalline rocks KW - thermomechanical 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/1819894187?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Thermal+drawdown-induced+flow+channeling+in+a+single+fracture+in+EGS&rft.au=Guo%2C+Bin%3BFu%2C+Pengcheng%3BHao%2C+Yue%3BPeters%2C+Catherine+A%3BCarrigan%2C+Charles+R&rft.aulast=Guo&rft.aufirst=Bin&rft.date=2016-05-01&rft.volume=61&rft.issue=&rft.spage=46&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2016.01.004 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 - 85 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-09-16 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - boundary conditions; crystalline rocks; drawdown; enhanced recovery; fluid flow; fluid injection; geothermal energy; geothermal engineering; geothermal fields; geothermal systems; hydraulic conductivity; mathematical models; numerical models; permeability; statistical analysis; thermomechanical properties DO - http://dx.doi.org/10.1016/j.geothermics.2016.01.004 ER - TY - JOUR T1 - Time-series analysis of surface deformation at Brady Hot Springs geothermal field (Nevada) using interferometric synthetic aperture radar AN - 1819893996; 2016-080248 AB - We analyze interferometric synthetic aperture radar (InSAR) data acquired between 2004 and 2014, by the ERS-2, Envisat, ALOS and TerraSAR-X/TanDEM-X satellite missions to measure and characterize time-dependent deformation at the Brady Hot Springs geothermal field in western Nevada due to extraction of fluids. The long axis of the approximately 4 km by approximately 1.5 km elliptical subsiding area coincides with the strike of the dominant normal fault system at Brady. Within this bowl of subsidence, the interference pattern shows several smaller features with length scales of the order of approximately 1 km. This signature occurs consistently in all of the well-correlated interferometric pairs spanning several months. Results from inverse modeling suggest that the deformation is a result of volumetric contraction in shallow units, no deeper than 600 m, likely associated with damaged regions where fault segments mechanically interact. Such damaged zones are expected to extend downward along steeply dipping fault planes, providing a high permeability conduit to the production wells. Using time series analysis, we test the hypothesis that geothermal production drives the observed deformation. We find a good correlation between the observed deformation rate and the rate of production in the shallow wells. We also explore mechanisms that could potentially cause the observed deformation, including thermal contraction of rock, decline in pore pressure and dissolution of minerals over time. Abstract Copyright (2016) Elsevier, B.V. JF - Geothermics AU - Ali, S T AU - Akerley, J AU - Baluyut, E C AU - Cardiff, M AU - Davatzes, N C AU - Feigl, Kurt L AU - Foxall, W AU - Fratta, D AU - Mellors, R J AU - Spielman, P AU - Wang, H F AU - Zemach, E Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 114 EP - 120 PB - Elsevier, Oxford-New York VL - 61 SN - 0375-6505, 0375-6505 KW - United States KW - time series analysis KW - statistical analysis KW - radar methods KW - mathematical models KW - geothermal engineering KW - Brady Hot Springs KW - thermal waters KW - ground water KW - geothermal energy KW - geothermal fields KW - Hot Springs Mountains KW - SAR KW - springs KW - InSAR KW - hot springs KW - Nevada KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819893996?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Time-series+analysis+of+surface+deformation+at+Brady+Hot+Springs+geothermal+field+%28Nevada%29+using+interferometric+synthetic+aperture+radar&rft.au=Ali%2C+S+T%3BAkerley%2C+J%3BBaluyut%2C+E+C%3BCardiff%2C+M%3BDavatzes%2C+N+C%3BFeigl%2C+Kurt+L%3BFoxall%2C+W%3BFratta%2C+D%3BMellors%2C+R+J%3BSpielman%2C+P%3BWang%2C+H+F%3BZemach%2C+E&rft.aulast=Ali&rft.aufirst=S&rft.date=2016-05-01&rft.volume=61&rft.issue=&rft.spage=114&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2016.01.008 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 - 58 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-16 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - Brady Hot Springs; geothermal energy; geothermal engineering; geothermal fields; ground water; hot springs; Hot Springs Mountains; InSAR; mathematical models; Nevada; radar methods; SAR; springs; statistical analysis; thermal waters; time series analysis; United States DO - http://dx.doi.org/10.1016/j.geothermics.2016.01.008 ER - TY - JOUR T1 - Cyanobacterial reuse of extracellular organic carbon in microbial mats AN - 1794501745; PQ0002948878 AB - Cyanobacterial organic matter excretion is crucial to carbon cycling in many microbial communities, but the nature and bioavailability of this C depend on unknown physiological functions. Cyanobacteria-dominated hypersaline laminated mats are a useful model ecosystem for the study of C flow in complex communities, as they use photosynthesis to sustain a more or less closed system. Although such mats have a large C reservoir in the extracellular polymeric substances (EPSs), the production and degradation of organic carbon is not well defined. To identify extracellular processes in cyanobacterial mats, we examined mats collected from Elkhorn Slough (ES) at Monterey Bay, California, for glycosyl and protein composition of the EPS. We found a prevalence of simple glucose polysaccharides containing either alpha or beta (1,4) linkages, indicating distinct sources of glucose with differing enzymatic accessibility. Using proteomics, we identified cyanobacterial extracellular enzymes, and also detected activities that indicate a capacity for EPS degradation. In a less complex system, we characterized the EPS of a cyanobacterial isolate from ES, ESFC-1, and found the extracellular composition of biofilms produced by this unicyanobacterial culture were similar to that of natural mats. By tracing isotopically labeled EPS into single cells of ESFC-1, we demonstrated rapid incorporation of extracellular-derived carbon. Taken together, these results indicate cyanobacteria reuse excess organic carbon, constituting a dynamic pool of extracellular resources in these mats. JF - ISME Journal AU - Stuart, Rhona K AU - Mayali, Xavier AU - Lee, Jackson Z AU - Craig Everroad, R AU - Hwang, Mona AU - Bebout, Brad M AU - Weber, Peter K AU - Pett-Ridge, Jennifer AU - Thelen, Michael P AD - Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, USA Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 1240 EP - 1251 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 10 IS - 5 SN - 1751-7362, 1751-7362 KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Microbiology Abstracts C: Algology, Mycology & Protozoology KW - Extracellular enzymes KW - Photosynthesis KW - Organic matter KW - Carbon cycle KW - Glucose KW - Cell culture KW - Polysaccharides KW - Cyanobacteria KW - Carbon KW - Protein composition KW - Excretion KW - proteomics KW - Biofilms KW - Microbial mats KW - A 01320:Microbial Degradation KW - K 03320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1794501745?accountid=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=ISME+Journal&rft.atitle=Cyanobacterial+reuse+of+extracellular+organic+carbon+in+microbial+mats&rft.au=Stuart%2C+Rhona+K%3BMayali%2C+Xavier%3BLee%2C+Jackson+Z%3BCraig+Everroad%2C+R%3BHwang%2C+Mona%3BBebout%2C+Brad+M%3BWeber%2C+Peter+K%3BPett-Ridge%2C+Jennifer%3BThelen%2C+Michael+P&rft.aulast=Stuart&rft.aufirst=Rhona&rft.date=2016-05-01&rft.volume=10&rft.issue=5&rft.spage=1240&rft.isbn=&rft.btitle=&rft.title=ISME+Journal&rft.issn=17517362&rft_id=info:doi/10.1038%2Fismej.2015.180 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-06-01 N1 - Last updated - 2016-08-17 N1 - SubjectsTermNotLitGenreText - Extracellular enzymes; Photosynthesis; Organic matter; Glucose; Carbon cycle; Cell culture; Polysaccharides; Carbon; Protein composition; Excretion; Biofilms; proteomics; Microbial mats; Cyanobacteria DO - http://dx.doi.org/10.1038/ismej.2015.180 ER - TY - JOUR T1 - Deflection by kinetic impact; sensitivity to asteroid properties AN - 1789753526; 2016-040209 JF - Icarus AU - Syal, Megan Bruck AU - Owen, J Michael AU - Miller, Paul L Y1 - 2016/05/01/ PY - 2016 DA - 2016 May 01 SP - 50 EP - 61 PB - Elsevier, New York, NY VL - 269 SN - 0019-1035, 0019-1035 KW - cratering KW - shear strength KW - power law KW - asteroids KW - near-Earth asteroids KW - orbits KW - simulation KW - hypervelocity impacts KW - dynamics KW - rotation KW - deflection KW - velocity KW - hydrodynamics KW - equations of state KW - kinetics KW - uncertainty KW - orientation KW - near-Earth objects KW - numerical models KW - strength KW - damage KW - impacts KW - ejecta KW - porosity KW - natural hazards KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789753526?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Deflection+by+kinetic+impact%3B+sensitivity+to+asteroid+properties&rft.au=Syal%2C+Megan+Bruck%3BOwen%2C+J+Michael%3BMiller%2C+Paul+L&rft.aulast=Syal&rft.aufirst=Megan&rft.date=2016-05-01&rft.volume=269&rft.issue=&rft.spage=50&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2016.01.010 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 62 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-05-19 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - asteroids; cratering; damage; deflection; dynamics; ejecta; equations of state; hydrodynamics; hypervelocity impacts; impacts; kinetics; natural hazards; near-Earth asteroids; near-Earth objects; numerical models; orbits; orientation; porosity; power law; rotation; shear strength; simulation; strength; uncertainty; velocity DO - http://dx.doi.org/10.1016/j.icarus.2016.01.010 ER - TY - JOUR T1 - Frequency of Acentric Fragments Are Associated with Cancer Risk in Subjects Exposed to Ionizing Radiation. AN - 1785743716; 27127157 AB - BACKGROUND/AIMBiomonitoring is currently applied in the estimation of health risks after overexposure to ionizing radiation (IR). The aim of this study was to compare the association of dicentric chromosomes and acentric fragments (AF) with cancer risk in subjects exposed to IR, as well as in control subjects.MATERIALS AND METHODSThe study was performed on 3,574 subjects (2,030 subjects exposed to IR and 1,544 control subjects). The mean follow-up period was 8 years.RESULTSIn subjects reporting exposure to IR, the presence of AFs and dicentric chromosomes was associated with a significant increase in cancer risk, hazard ratio (HR)=1.78 (95% confidence interval (CI)=1.01-3.13) and HR=1.73 (95% CI=1.03-2.90), respectively.CONCLUSIONAFs are associated with cancer risk and have a similar sensitivity to dicentric chromosomes in subjects exposed to IR. Because automated AF scoring can be easily introduced using fast flow cytometry combined with the pan-centromere staining, this biomarker may hold promise as a potential sensitive biomarker of exposure to IR and cancer risk. JF - Anticancer research AU - Fucic, Aleksandra AU - Bonassi, Stefano AU - Gundy, Sarolta AU - Lazutka, Juozas AU - Sram, Radim AU - Ceppi, Marcello AU - Lucas, Joe N AD - Institute for Medical Research and Occupational Health, Zagreb, Croatia afucic@imi.hr. ; Unit of Clinical and Molecular Epidemiology, IRCCS San Raffaele Pisana, Rome, Italy. ; National Institute of Oncology, Budapest, Hungary. ; Institute of Biotechnology, Vilnius University, Vilnius, Lithuania. ; Institute of Experimental Medicine AS CR, Prague, Czech Republic. ; IRCCS AOU San Martino - IST, Genoa, Italy. ; University of California, Emeritus, Lawrence Livermore National Laboratory, Livermore, CA, U.S.A. Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 2451 EP - 2457 VL - 36 IS - 5 KW - Index Medicus KW - carcinogenesis KW - chromosome damage KW - Ionizing radiation KW - cancer risk KW - chromosomal aberrations KW - acentric fragments KW - Humans KW - Chromosome Aberrations KW - Neoplasms, Radiation-Induced -- genetics KW - Genetic Predisposition to Disease KW - Radiation, Ionizing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1785743716?accountid=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=Anticancer+research&rft.atitle=Frequency+of+Acentric+Fragments+Are+Associated+with+Cancer+Risk+in+Subjects+Exposed+to+Ionizing+Radiation.&rft.au=Fucic%2C+Aleksandra%3BBonassi%2C+Stefano%3BGundy%2C+Sarolta%3BLazutka%2C+Juozas%3BSram%2C+Radim%3BCeppi%2C+Marcello%3BLucas%2C+Joe+N&rft.aulast=Fucic&rft.aufirst=Aleksandra&rft.date=2016-05-01&rft.volume=36&rft.issue=5&rft.spage=2451&rft.isbn=&rft.btitle=&rft.title=Anticancer+research&rft.issn=1791-7530&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2017-01-30 N1 - Date created - 2016-04-29 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 ER - TY - JOUR T1 - Advanced geophysical underground coal gasification monitoring AN - 1808620704; PQ0003246601 AB - Underground Coal Gasification (UCG) produces less surface impact, atmospheric pollutants and greenhouse gas than traditional surface mining and combustion. Therefore, it may be useful in mitigating global change caused by anthropogenic activities. Careful monitoring of the UCG process is essential in minimizing environmental impact. Here we first summarize monitoring methods that have been used in previous UCG field trials. We then discuss in more detail a number of promising advanced geophysical techniques. These methods - seismic, electromagnetic, and remote sensing techniques - may provide improved and cost-effective ways to image both the subsurface cavity growth and surface subsidence effects. Active and passive seismic data have the promise to monitor the burn front, cavity growth, and observe cavity collapse events. Electrical resistance tomography (ERT) produces near real time tomographic images autonomously, monitors the burn front and images the cavity using low-cost sensors, typically running within boreholes. Interferometric synthetic aperture radar (InSAR) is a remote sensing technique that has the capability to monitor surface subsidence over the wide area of a commercial-scale UCG operation at a low cost. It may be possible to infer cavity geometry from InSAR (or other surface topography) data using geomechanical modeling. The expected signals from these monitoring methods are described along with interpretive modeling for typical UCG cavities. They are illustrated using field results from UCG trials and other relevant subsurface operations. JF - Mitigation and Adaptation Strategies for Global Change AU - Mellors, Robert AU - Yang, X AU - White, JA AU - Ramirez, A AU - Wagoner, J AU - Camp, D W AD - Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA, 94550, USA, mellors1@llnl.gov Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 487 EP - 500 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 21 IS - 4 SN - 1381-2386, 1381-2386 KW - Pollution Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Environment Abstracts KW - Remote Sensing KW - Burns KW - Pollution monitoring KW - Climate change KW - Anthropogenic factors KW - Remote sensing KW - Coal KW - Boreholes KW - Growth KW - Monitoring methods KW - Pollutants KW - Economics KW - Gasification KW - Subsidence KW - Geophysics KW - Topography KW - Coal Gasification KW - Environmental impact KW - Collapse KW - Model Studies KW - Combustion KW - Methodology KW - Air pollution KW - Adaptability KW - Synthetic aperture radar KW - Mine Wastes KW - Monitoring KW - P 0000:AIR POLLUTION KW - SW 0810:General KW - Q5 08502:Methods and instruments KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808620704?accountid=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=Mitigation+and+Adaptation+Strategies+for+Global+Change&rft.atitle=Advanced+geophysical+underground+coal+gasification+monitoring&rft.au=Mellors%2C+Robert%3BYang%2C+X%3BWhite%2C+JA%3BRamirez%2C+A%3BWagoner%2C+J%3BCamp%2C+D+W&rft.aulast=Mellors&rft.aufirst=Robert&rft.date=2016-04-01&rft.volume=21&rft.issue=4&rft.spage=487&rft.isbn=&rft.btitle=&rft.title=Mitigation+and+Adaptation+Strategies+for+Global+Change&rft.issn=13812386&rft_id=info:doi/10.1007%2Fs11027-014-9584-1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Number of references - 25 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Pollution monitoring; Growth; Synthetic aperture radar; Climate change; Subsidence; Remote sensing; Coal; Boreholes; Methodology; Burns; Anthropogenic factors; Environmental impact; Combustion; Air pollution; Adaptability; Monitoring methods; Gasification; Economics; Geophysics; Topography; Remote Sensing; Coal Gasification; Pollutants; Collapse; Mine Wastes; Monitoring; Model Studies DO - http://dx.doi.org/10.1007/s11027-014-9584-1 ER - TY - JOUR T1 - Industrial-era global ocean heat uptake doubles in recent decades AN - 1787965176; PQ0002932878 AB - Formal detection and attribution studies have used observations and climate models to identify an anthropogenic warming signature in the upper (0-700m) ocean. Recently, as a result of the so-called surface warming hiatus, there has been considerable interest in global ocean heat content (OHC) changes in the deeper ocean, including natural and anthropogenically forced changes identified in observational, modelling and data re-analysis studies. Here, we examine OHC changes in the context of the Earth's global energy budget since early in the industrial era (circa 1865-2015) for a range of depths. We rely on OHC change estimates from a diverse collection of measurement systems including data from the nineteenth-century Challenger expedition, a multi-decadal record of ship-based in situ mostly upper-ocean measurements, the more recent near-global Argo floats profiling to intermediate (2,000m) depths, and full-depth repeated transoceanic sections. We show that the multi-model mean constructed from the current generation of historically forced climate models is consistent with the OHC changes from this diverse collection of observational systems. Our model-based analysis suggests that nearly half of the industrial-era increases in global OHC have occurred in recent decades, with over a third of the accumulated heat occurring below 700m and steadily rising. JF - Nature Climate Change AU - Gleckler, Peter J AU - Durack, Paul J AU - Stouffer, Ronald J AU - Johnson, Gregory C AU - Forest, Chris E AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, 7000 East Avenue Livermore, California 94550, USA Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 394 EP - 398 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 6 IS - 4 SN - 1758-678X, 1758-678X KW - Environment Abstracts; Meteorological & Geoastrophysical Abstracts KW - Historical account KW - Climate models KW - Climate KW - Climate change KW - Anthropogenic factors KW - Energy budget KW - Oceans KW - Energy KW - Uptake KW - Global warming KW - Expeditions KW - Oceanographic data KW - ENA 03:Energy KW - M2 551.583:Variations (551.583) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1787965176?accountid=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=Nature+Climate+Change&rft.atitle=Industrial-era+global+ocean+heat+uptake+doubles+in+recent+decades&rft.au=Gleckler%2C+Peter+J%3BDurack%2C+Paul+J%3BStouffer%2C+Ronald+J%3BJohnson%2C+Gregory+C%3BForest%2C+Chris+E&rft.aulast=Gleckler&rft.aufirst=Peter&rft.date=2016-04-01&rft.volume=6&rft.issue=4&rft.spage=394&rft.isbn=&rft.btitle=&rft.title=Nature+Climate+Change&rft.issn=1758678X&rft_id=info:doi/10.1038%2Fnclimate2915 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-11-09 N1 - SubjectsTermNotLitGenreText - Climate models; Climate change; Global warming; Energy budget; Oceanographic data; Historical account; Energy; Oceans; Climate; Anthropogenic factors; Uptake; Expeditions DO - http://dx.doi.org/10.1038/nclimate2915 ER - TY - JOUR T1 - Investigation of boundary-layer wind predictions during nocturnal low-level jet events using the Weather Research and Forecasting model AN - 1776656840; PQ0002776090 AB - The accuracy of boundary-layer wind profiles occurring during nocturnal low-level jet (LLJ) events, and their sensitivities to variations of user-specifiable model configuration parameters within the Weather Research and Forecasting model, was investigated. Simulations were compared against data from a wind-profiling lidar, deployed to the Northern Great Plains during the U.S. Department of Energy-supported Weather Forecast Improvement Project. Two periods during the autumn of 2011 featuring LLJs of similar magnitudes and durations occurring during several consecutive nights were selected for analysis. Simulated wind speed and direction at 80 and 180m above the surface, the former a typical wind turbine hub height, bulk vertical gradients between 40 and 120m, a typical rotor span, and the maximum wind speeds occurring at 80 and 180m, and their times of occurrence, were compared with the observations. Sensitivities of these parameters to the horizontal and vertical grid spacing, planetary boundary layer and land surface model physics options, and atmospheric forcing dataset, were assessed using ensembles encompassing changes of each of these configuration parameters. Each simulation captured the diurnal cycle of wind speed and stratification, producing LLJs during each overnight period; however, large discrepancies in relation to the observations were frequently observed, with each ensemble producing a wide range of distributions, reflecting highly variable representations of stratification during the weakly stable overnight conditions. Root mean square error and bias values computed over the LLJ cycle (late evening through the following morning) revealed that, while some configurations performed better or worse in different aspects and at different times, none exhibited definitively superior performance. The considerable root mean square error and bias values, even among the 'best' performing simulations, underscore the need for improved simulation capabilities for the prediction of near-surface winds during LLJ conditions. JF - Wind Energy AU - Mirocha, J D AU - Simpson, MD AU - Fast, J D AU - Berg, L K AU - Baskett, R L AD - Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 739 EP - 762 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 19 IS - 4 SN - 1095-4244, 1095-4244 KW - Environment Abstracts; Sustainability Science Abstracts KW - Prediction KW - Diurnal variations KW - Sensitivity KW - Weather KW - Plains KW - Lidar KW - Velocity KW - Simulation KW - Stratification KW - Wind energy KW - Boundary layers KW - Atmospheric forcing KW - Wind KW - M3 1010:Issues in Sustainable Development KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1776656840?accountid=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=Wind+Energy&rft.atitle=Investigation+of+boundary-layer+wind+predictions+during+nocturnal+low-level+jet+events+using+the+Weather+Research+and+Forecasting+model&rft.au=Mirocha%2C+J+D%3BSimpson%2C+MD%3BFast%2C+J+D%3BBerg%2C+L+K%3BBaskett%2C+R+L&rft.aulast=Mirocha&rft.aufirst=J&rft.date=2016-04-01&rft.volume=19&rft.issue=4&rft.spage=739&rft.isbn=&rft.btitle=&rft.title=Wind+Energy&rft.issn=10954244&rft_id=info:doi/10.1002%2Fwe.1862 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Prediction; Weather; Sensitivity; Diurnal variations; Plains; Simulation; Velocity; Lidar; Stratification; Wind energy; Boundary layers; Atmospheric forcing; Wind DO - http://dx.doi.org/10.1002/we.1862 ER - TY - JOUR T1 - Disposition of the Dietary Mutagen 2-Amino-3,8-dimethylimidazo[4,5-f]quinoxaline in Healthy and Pancreatic Cancer Compromised Humans. AN - 1775178926; 26918625 AB - Pancreatic cancer is the fourth leading cause of cancer death in the U.S. Once diagnosed, prognosis is poor with a 5-year survival rate of less than 5%. Exposure to carcinogenic heterocyclic amines (HCAs) derived from cooked meat has been shown to be positively associated with pancreatic cancer risk. To evaluate the processes that determine the carcinogenic potential of HCAs for human pancreas, 14-carbon labeled 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), a putative human carcinogenic HCA found in well-done cooked meat, was administered at a dietary relevant dose to human volunteers diagnosed with pancreatic cancer undergoing partial pancreatectomy and healthy control volunteers. After (14)C-MeIQx exposure, blood and urine were collected for pharmacokinetic and metabolite analysis. MeIQx-DNA adducts levels were quantified by accelerator mass spectrometry from pancreatic tissue excised during surgery from the cancer patient group. Pharmacokinetic analysis of plasma revealed a rapid distribution of MeIQx with a plasma elimination half-life of approximately 3.5 h in 50% of the cancer patients and all of the control volunteers. In 2 of the 4 cancer patients, very low levels of MeIQx were detected in plasma and urine suggesting low absorption from the gut into the plasma. Urinary metabolite analysis revealed five MeIQx metabolites with 2-amino-3-methylimidazo[4,5-f]quinoxaline-8-carboxylic acid being the most abundant accounting for 25%-50% of the recovered 14-carbon/mL urine. There was no discernible difference in metabolite levels between the cancer patient volunteers and the control group. MeIQx-DNA adduct analysis of pancreas and duodenum tissue revealed adduct levels indistinguishable from background levels. Although other meat-derived HCA mutagens have been shown to bind DNA in pancreatic tissue, indicating that exposure to HCAs from cooked meat cannot be discounted as a risk factor for pancreatic cancer, the results from this current study show that exposure to a single dietary dose of MeIQx does not readily form measurable DNA adducts under the conditions of the experiment. JF - Chemical research in toxicology AU - Malfatti, Michael A AU - Kuhn, Edward A AU - Turteltaub, Kenneth W AU - Vickers, Selwyn M AU - Jensen, Eric H AU - Strayer, Lori AU - Anderson, Kristin E AD - Biosciences and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory , 7000 East Avenue, L-452, Livermore, California 94550, United States. ; University of Alabama , 1720 2nd Avenue South, Birmingham, Alabama 35233, United States. ; University of Minnesota , Minneapolis, Minnesota 55455, United States. Y1 - 2016/03/21/ PY - 2016 DA - 2016 Mar 21 SP - 352 EP - 358 VL - 29 IS - 3 KW - DNA Adducts KW - 0 KW - Mutagens KW - Quinoxalines KW - 2-amino-3,8-dimethylimidazo(4,5-f)quinoxaline KW - 77500-04-0 KW - Index Medicus KW - DNA Adducts -- blood KW - Humans KW - Pancreatectomy KW - Case-Control Studies KW - DNA Adducts -- metabolism KW - DNA Adducts -- urine KW - Quinoxalines -- blood KW - Pancreatic Neoplasms -- metabolism KW - Pancreatic Neoplasms -- blood KW - Mutagens -- analysis KW - Quinoxalines -- urine KW - Quinoxalines -- pharmacokinetics KW - Mutagens -- pharmacokinetics KW - Quinoxalines -- administration & dosage KW - Mutagens -- administration & dosage KW - Pancreatic Neoplasms -- urine KW - Pancreatic Neoplasms -- surgery KW - Diet -- adverse effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1775178926?accountid=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+research+in+toxicology&rft.atitle=Disposition+of+the+Dietary+Mutagen+2-Amino-3%2C8-dimethylimidazo%5B4%2C5-f%5Dquinoxaline+in+Healthy+and+Pancreatic+Cancer+Compromised+Humans.&rft.au=Malfatti%2C+Michael+A%3BKuhn%2C+Edward+A%3BTurteltaub%2C+Kenneth+W%3BVickers%2C+Selwyn+M%3BJensen%2C+Eric+H%3BStrayer%2C+Lori%3BAnderson%2C+Kristin+E&rft.aulast=Malfatti&rft.aufirst=Michael&rft.date=2016-03-21&rft.volume=29&rft.issue=3&rft.spage=352&rft.isbn=&rft.btitle=&rft.title=Chemical+research+in+toxicology&rft.issn=1520-5010&rft_id=info:doi/10.1021%2Facs.chemrestox.5b00495 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2017-01-27 N1 - Date created - 2016-03-21 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Chem Res Toxicol. 2001 Feb;14(2):211-21 [11258970] CA Cancer J Clin. 2014 Jan-Feb;64(1):9-29 [24399786] Mutat Res. 2002 Sep 30;506-507:225-31 [12351162] Am J Epidemiol. 2003 Mar 1;157(5):434-45 [12615608] Anal Chem. 2003 May 1;75(9):2192-6 [12720362] Carcinogenesis. 1987 May;8(5):665-8 [3581424] Carcinogenesis. 1989 Mar;10(3):601-3 [2924403] Jpn J Cancer Res. 1989 Dec;80(12):1145-8 [2516840] Proc Natl Acad Sci U S A. 1990 Jul;87(14):5288-92 [2371271] Jpn J Cancer Res. 1990 May;81(5):470-6 [2116395] Cancer Res. 1992 Apr 1;52(7 Suppl):2092s-2098s [1544146] Cancer Res. 1992 Sep 1;52(17):4682-7 [1511434] Cancer Res. 1992 Nov 15;52(22):6216-23 [1423264] J Gastroenterol. 1996 Feb;31(1):81-5 [8808433] Mutat Res. 1997 May 12;376(1-2):243-52 [9202761] Cancer Res. 1997 Aug 15;57(16):3457-64 [9270013] Mutat Res. 1997 Aug 1;378(1-2):13-22 [9288881] Anal Chem. 1995 Jun 1;67(11):353A-359A [9306729] Carcinogenesis. 1997 Dec;18(12):2421-7 [9450490] Chem Res Toxicol. 1998 Mar;11(3):217-25 [9544620] Int J Cancer. 1999 Feb 9;80(4):539-45 [9935154] Cancer Epidemiol Biomarkers Prev. 2005 Sep;14(9):2261-5 [16172241] J Natl Cancer Inst. 2005 Oct 5;97(19):1458-65 [16204695] Cancer Res. 2005 Dec 15;65(24):11779-84 [16357191] Biomarkers. 2006 Jul-Aug;11(4):319-28 [16908439] Cancer Epidemiol Biomarkers Prev. 2007 Apr;16(4):655-61 [17416754] Cancer Epidemiol Biomarkers Prev. 2007 Dec;16(12):2664-75 [18086772] Cancer Epidemiol Biomarkers Prev. 2008 Nov;17(11):3098-107 [18990750] Drug Metab Dispos. 2009 Nov;37(11):2123-6 [19666988] Nutr Cancer. 2009;61(4):437-46 [19838915] Mol Carcinog. 2012 Jan;51(1):128-37 [22162237] Chem Res Toxicol. 2012 Feb 20;25(2):410-21 [22118226] Carcinogenesis. 2012 Jul;33(7):1332-9 [22552404] Int J Cancer. 2013 Feb 1;132(3):617-24 [22610753] Cancer Epidemiol Biomarkers Prev. 2013 Jul;22(7):1336-9 [23632817] Nutr Cancer. 2013;65(8):1141-50 [24168237] Anticancer Res. 2014 Jan;34(1):9-21 [24403441] Mutat Res. 2002 Sep 30;506-507:175-85 [12351157] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acs.chemrestox.5b00495 ER - TY - JOUR T1 - Large-scale test of dynamic correlation processors; implications for correlation-based seismic pipelines AN - 1780805172; 2016-034554 AB - Correlation detectors are of considerable interest to seismic monitoring communities because they offer reduced detection thresholds and combine detection, location, and identification functions into a single operation. They appear to be ideal for applications requiring screening of frequent repeating events. But questions remain about how broadly empirical correlation methods are applicable. We describe the effectiveness of banks of correlation detectors in a system that combines traditional power detectors with correlation detectors in terms of efficiency, which we define to be the fraction of events detected by the correlators. This article elaborates and extends the concept of a dynamic correlation detection framework-a system that autonomously creates correlation detectors from event waveforms detected by power detectors and reports observed performance on a network of arrays in terms of efficiency. We performed a large-scale test of dynamic correlation processors on an 11 TB global dataset using 25 arrays in the 1-3 Hz frequency band. The system found over 3.2 million unique signals and produced 459,747 screened detections. A very satisfying result is that, on average, efficiency grows with time and, after nearly 16 years of operation, exceeds 47% for events observed over all distance ranges and approaches 70% for near-regional and 90% for local events. This suggests that future pipeline architectures should make extensive use of correlation detectors, principally for decluttering observations of local and near-regional events. Our results also suggest that future operations based on correlation detection will require commodity large-scale computing infrastructure, because the numbers of correlators in an autonomous system can grow into the hundreds of thousands. JF - Bulletin of the Seismological Society of America AU - Dodge, D A AU - Harris, D B Y1 - 2016/03/15/ PY - 2016 DA - 2016 Mar 15 SP - 435 EP - 452 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 2 SN - 0037-1106, 0037-1106 KW - United States KW - seismograms KW - precursors KW - technology KW - correlation KW - information management KW - data management KW - California KW - seismicity KW - focus KW - algorithms KW - seismic networks KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780805172?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Large-scale+test+of+dynamic+correlation+processors%3B+implications+for+correlation-based+seismic+pipelines&rft.au=Dodge%2C+D+A%3BHarris%2C+D+B&rft.aulast=Dodge&rft.aufirst=D&rft.date=2016-03-15&rft.volume=106&rft.issue=2&rft.spage=435&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150254 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 - 38 N1 - PubXState - CA N1 - Document feature - illus. incl. 8 tables N1 - Last updated - 2016-06-17 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; California; correlation; data management; earthquakes; focus; information management; instruments; precursors; seismic networks; seismicity; seismograms; technology; United States DO - http://dx.doi.org/10.1785/0120150254 ER - TY - JOUR T1 - Defects, Entropy, and the Stabilization of Alternative Phase Boundary Orientations in Battery Electrode Particles AN - 1800495332; PQ0002847291 AB - Using a novel statistical approach that efficiently explores the space of possible defect configurations, the present study investigates the chemomechanical coupling between interfacial structural defects and phase boundary alignments within phase-separating electrode particles. Applied to the battery cathode material Li sub(X)FePO sub(4) as an example, the theoretical analysis reveals that small, defect-induced deviations from an ideal interface can lead to dramatic shifts in the orientations of phase boundaries between Li-rich and Li-lean phases, stabilizing otherwise unfavorable orientations. Significantly, this stabilization arises predominantly from configurational entropic factors associated with the presence of the interfacial defects rather than from absolute energetic considerations. The specific entropic factors pertain to the diversity of defect configurations and their contributions to rotational/orientational rigidity of phase boundaries. Comparison of the predictions with experimental observations indicates that the additional entropy contributions indeed play a dominant role under actual cycling conditions, leading to the conclusion that interfacial defects must be considered when analyzing the stability and evolution kinetics of the internal phase microstructure of strongly phase-separating systems. Possible implications for tuning the kinetics of (de)lithiation based on selective defect incorporation are discussed. This understanding can be generalized to the chemomechanics of other defective solid phase boundaries. The thermodynamic and kinetic stabilization of defect-containing phase boundary orientations in energy storage materials is theoretically investigated using a statistical approach. Application to Li sub(X)FePO sub(4) produces a probability landscape of preferred Li-rich/Li-lean phase boundary orientations, which reveals two new configurational entropic factors associated with the defective interface. The importance of these entropic factors in the stabilization under actual operating conditions is identified by comparison with available experimental observations. JF - Advanced Energy Materials AU - Heo, Tae Wook AU - Tang, Ming AU - Chen, Long-Qing AU - Wood, Brandon C AD - Materials Science Division, Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA. Y1 - 2016/03// PY - 2016 DA - March 2016 SP - [np] PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 6 IS - 6 SN - 1614-6832, 1614-6832 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); ANTE: Abstracts in New Technologies and Engineering (AN); Aerospace & High Technology Database (AH) KW - Phase boundaries KW - Orientation KW - Stabilization KW - Electrodes KW - Battery KW - Deviation KW - Entropy KW - Defects KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800495332?accountid=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=Advanced+Energy+Materials&rft.atitle=Defects%2C+Entropy%2C+and+the+Stabilization+of+Alternative+Phase+Boundary+Orientations+in+Battery+Electrode+Particles&rft.au=Heo%2C+Tae+Wook%3BTang%2C+Ming%3BChen%2C+Long-Qing%3BWood%2C+Brandon+C&rft.aulast=Heo&rft.aufirst=Tae&rft.date=2016-03-01&rft.volume=6&rft.issue=6&rft.spage=%5Bnp%5D&rft.isbn=&rft.btitle=&rft.title=Advanced+Energy+Materials&rft.issn=16146832&rft_id=info:doi/10.1002%2Faenm.201501759 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/aenm.201501759 ER - TY - JOUR T1 - Solvent-directed sol-gel assembly of 3-dimensional graphene-tented metal oxides and strong synergistic disparities in lithium storage AN - 1798737455; PQ0003133503 AB - Graphene/metal oxide (GMO) nanocomposites promise a broad range of utilities for lithium ion batteries (LIBs), pseudocapacitors, catalysts, and sensors. When applied as anodes for LIBs, GMOs often exhibit high capacity, improved rate capability and cycling performance. Numerous studies have attributed these favorable properties to a passive role played by the exceptional electronic and mechanical properties of graphene in enabling metal oxides (MOs) to achieve near-theoretical capacities. In contrast, the effects of MOs on the active lithium storage mechanisms of graphene remain enigmatic. Viaa unique two-step solvent-directed sol-gel process, we have synthesized and directly compared the electrochemical performance of several representative GMOs, namely Fe sub(2)O sub(3)/graphene, SnO sub(2)/graphene, and TiO sub(2)/graphene. We observe that MOs can play an equally important role in empowering graphene to achieve large reversible lithium storage capacity. The magnitude of capacity improvement is found to scale roughly with the surface coverage of MOs, and depend sensitively on the type of MOs. We define a synergistic factor based on the capacity contributions. Our quantitative assessments indicate that the synergistic effect is most achievable in conversion-reaction GMOs (Fe sub(2)O sub(3)/graphene and SnO sub(2)/graphene) but not in intercalation-based TiO sub(2)/graphene. However, a long cycle stability up to 2000 cycles was observed in TiO sub(2)/graphene nanocomposites. We propose a surface coverage model to qualitatively rationalize the beneficial roles of MOs to graphene. Our first-principles calculations further suggest that the extra lithium storage sites could result from the formation of Li sub(2)O at the interface with graphene during the conversion-reaction. These results suggest an effective pathway for reversible lithium storage in graphene and shift design paradigms for graphene-based electrodes. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Ye, Jianchao AU - An, Yonghao AU - Montalvo, Elizabeth AU - Campbell, Patrick G AU - Worsley, Marcus A AU - Tran, Ich C AU - Liu, Yuanyue AU - Wood, Brandon C AU - Biener, Juergen AU - Jiang, Hanqing AU - Tang, Ming AU - Wang, YMorris AD - Physical and Life Sciences Directorate; Lawrence Livermore National Laboratory; Livermore; CA 94550; USA Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 4032 EP - 4043 PB - Royal Society of Chemistry VL - 4 IS - 11 SN - 2050-7488, 2050-7488 KW - Sustainability Science Abstracts KW - Metals KW - Synergistic effects KW - Sensors KW - Sustainability KW - Utilities KW - Storage KW - Batteries KW - Energy KW - Electrodes KW - Catalysts KW - Electrochemistry KW - Lithium KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1798737455?accountid=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=Solvent-directed+sol-gel+assembly+of+3-dimensional+graphene-tented+metal+oxides+and+strong+synergistic+disparities+in+lithium+storage&rft.au=Ye%2C+Jianchao%3BAn%2C+Yonghao%3BMontalvo%2C+Elizabeth%3BCampbell%2C+Patrick+G%3BWorsley%2C+Marcus+A%3BTran%2C+Ich+C%3BLiu%2C+Yuanyue%3BWood%2C+Brandon+C%3BBiener%2C+Juergen%3BJiang%2C+Hanqing%3BTang%2C+Ming%3BWang%2C+YMorris&rft.aulast=Ye&rft.aufirst=Jianchao&rft.date=2016-03-01&rft.volume=4&rft.issue=11&rft.spage=4032&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%2Fc5ta10730j LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-06-01 N1 - Number of references - 75 N1 - Last updated - 2016-09-01 N1 - SubjectsTermNotLitGenreText - Storage; Metals; Synergistic effects; Sensors; Batteries; Energy; Electrodes; Catalysts; Electrochemistry; Utilities; Sustainability; Lithium DO - http://dx.doi.org/10.1039/c5ta10730j ER - TY - JOUR T1 - Distribution of tritium in precipitation and surface water in California AN - 1793203309; 2016-049499 AB - The tritium concentration in the surface hydrosphere throughout California was characterized to examine the reasons for spatial variability and to enhance the applicability of tritium in hydrological investigations. Eighteen precipitation samples were analyzed and 148 samples were collected from surface waters across California in the Summer and Fall of 2013, with repeat samples from some locations collected in Winter and Spring of 2014 to examine seasonal variation. The concentration of tritium in present day precipitation varied from 4.0 pCi/L near the California coast to 17.8 pCi/L in the Sierra Nevada Mountains. Concentrations in precipitation increase in spring due to the 'Spring Leak' phenomenon. The average coastal concentration (6.3 + or - 1.2 pCi/L) in precipitation matches estimated pre-nuclear levels. Surface water samples show a trend of increasing tritium with inland distance. Superimposed on that trend, elevated tritium concentrations are found in the San Francisco Bay area compared to other coastal areas, resulting from municipal water imported from inland mountain sources and local anthropogenic sources. Tritium concentrations in most surface waters decreased between Summer/Fall 2013 and Winter/Spring 2014 likely due to an increased groundwater signal as a result of drought conditions in 2014. A relationship between tritium and electrical conductivity in surface water was found to be indicative of water provenance and anthropogenic influences such as agricultural runoff. Despite low initial concentrations in precipitation, tritium continues to be a valuable tracer in a post nuclear bomb pulse world. Abstract Copyright (2016) Elsevier, B.V. JF - Journal of Hydrology AU - Harms, Patrick A AU - Visser, Ate AU - Moran, Jean E AU - Esser, Brad K Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 63 EP - 72 PB - Elsevier, Amsterdam VL - 534 SN - 0022-1694, 0022-1694 KW - United States KW - Sierra Nevada KW - electrical conductivity KW - isotopes KW - atmospheric precipitation KW - tritium KW - California KW - spatial variations KW - radioactive isotopes KW - sampling KW - tracers KW - nuclear explosions KW - chemical composition KW - fallout KW - explosions KW - rainfall KW - human activity KW - surface water KW - statistical analysis KW - agriculture KW - provenance KW - San Francisco Bay region KW - hydrogen KW - runoff KW - residence time KW - mathematical methods KW - seasonal variations KW - land use KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793203309?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Distribution+of+tritium+in+precipitation+and+surface+water+in+California&rft.au=Harms%2C+Patrick+A%3BVisser%2C+Ate%3BMoran%2C+Jean+E%3BEsser%2C+Brad+K&rft.aulast=Harms&rft.aufirst=Patrick&rft.date=2016-03-01&rft.volume=534&rft.issue=&rft.spage=63&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2015.12.046 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 - 37 N1 - Document feature - illus. incl. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-06-02 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - agriculture; atmospheric precipitation; California; chemical composition; electrical conductivity; explosions; fallout; human activity; hydrogen; isotopes; land use; mathematical methods; nuclear explosions; provenance; radioactive isotopes; rainfall; residence time; runoff; sampling; San Francisco Bay region; seasonal variations; Sierra Nevada; spatial variations; statistical analysis; surface water; tracers; tritium; United States DO - http://dx.doi.org/10.1016/j.jhydrol.2015.12.046 ER - TY - JOUR T1 - Keeping the lights on for global ocean salinity observation AN - 1773859780; PQ0002721549 JF - Nature Climate Change AU - Durack, Paul J AU - Lee, Tong AU - Vinogradova, Nadya T AU - Stammer, Detlef AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, 7000 East Avenue Livermore, California 94550, USA Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 228 EP - 231 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 6 IS - 3 SN - 1758-678X, 1758-678X KW - ASFA 3: Aquatic Pollution & Environmental Quality; Oceanic Abstracts KW - Climate change KW - Q5 08503:Characteristics, behavior and fate KW - O 7060:Navigation and Communications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773859780?accountid=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=Nature+Climate+Change&rft.atitle=Keeping+the+lights+on+for+global+ocean+salinity+observation&rft.au=Durack%2C+Paul+J%3BLee%2C+Tong%3BVinogradova%2C+Nadya+T%3BStammer%2C+Detlef&rft.aulast=Durack&rft.aufirst=Paul&rft.date=2016-03-01&rft.volume=6&rft.issue=3&rft.spage=228&rft.isbn=&rft.btitle=&rft.title=Nature+Climate+Change&rft.issn=1758678X&rft_id=info:doi/10.1038%2Fnclimate2946 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Climate change DO - http://dx.doi.org/10.1038/nclimate2946 ER - TY - JOUR T1 - Geostatistical analysis of tritium, groundwater age and other noble gas derived parameters in California AN - 1768575825; PQ0002690025 AB - Key characteristics of California groundwater systems related to aquifer vulnerability, sustainability, recharge locations and mechanisms, and anthropogenic impact on recharge are revealed in a spatial geostatistical analysis of a unique data set of tritium, noble gases and other isotopic analyses unprecedented in size at nearly 4000 samples. The correlation length of key groundwater residence time parameters varies between tens of kilometers (3H; age) to the order of a hundred kilometers (4Heter; 14C; 3Hetrit). The correlation length of parameters related to climate, topography and atmospheric processes is on the order of several hundred kilometers (recharge temperature; delta 18O). Young groundwater ages that highlight regional recharge areas are located in the eastern San Joaquin Valley, in the southern Santa Clara Valley Basin, in the upper LA basin and along unlined canals carrying Colorado River water, showing that much of the recent recharge in central and southern California is dominated by river recharge and managed aquifer recharge. Modern groundwater is found in wells with the top open intervals below 60 m depth in the southeastern San Joaquin Valley, Santa Clara Valley and Los Angeles basin, as the result of intensive pumping and/or managed aquifer recharge operations. JF - Water Research AU - Visser, A AU - Moran, JE AU - Hillegonds, Darren AU - Singleton, MJ AU - Kulongoski, Justin T AU - Belitz, Kenneth AU - Esser, B K AD - Lawrence Livermore National Laboratory, USA Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 314 EP - 330 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 91 SN - 0043-1354, 0043-1354 KW - Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Environment Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - Groundwater KW - Water age KW - Geostatistics KW - Tritium KW - Noble gas KW - Aquifer KW - Resource management KW - Residence time KW - Basins KW - USA, Colorado R. KW - Vulnerability KW - Topography KW - Rivers KW - Valleys KW - Sustainability KW - Oxygen isotopes KW - Canals KW - Gases KW - Surface-groundwater Relations KW - Water management KW - Geohydrology KW - Groundwater age KW - Groundwater Recharge KW - Aquifers KW - Age KW - USA, California, San Joaquin Valley KW - Anthropogenic factors KW - Correlations KW - Atmospheric processes KW - Groundwater Basins KW - Groundwater residence time KW - Rare gases KW - Climate KW - INE, USA, California, Los Angeles Basin KW - Aquifer recharge KW - Oxygen isotope ratio KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - M3 1010:Issues in Sustainable Development KW - Q5 08502:Methods and instruments KW - M2 556.3:Groundwater Hydrology (556.3) KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1768575825?accountid=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+Research&rft.atitle=Geostatistical+analysis+of+tritium%2C+groundwater+age+and+other+noble+gas+derived+parameters+in+California&rft.au=Visser%2C+A%3BMoran%2C+JE%3BHillegonds%2C+Darren%3BSingleton%2C+MJ%3BKulongoski%2C+Justin+T%3BBelitz%2C+Kenneth%3BEsser%2C+B+K&rft.aulast=Visser&rft.aufirst=A&rft.date=2016-03-01&rft.volume=91&rft.issue=&rft.spage=314&rft.isbn=&rft.btitle=&rft.title=Water+Research&rft.issn=00431354&rft_id=info:doi/10.1016%2Fj.watres.2016.01.004 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Rare gases; Aquifer; Resource management; Residence time; Water management; Tritium; Climate; Oxygen isotope ratio; Vulnerability; Oxygen isotopes; Aquifers; Canals; Aquifer recharge; Atmospheric processes; Correlations; Groundwater age; Groundwater residence time; Topography; Rivers; Age; Anthropogenic factors; Basins; Valleys; Sustainability; Gases; Groundwater; Surface-groundwater Relations; Geohydrology; Groundwater Basins; Groundwater Recharge; USA, Colorado R.; INE, USA, California, Los Angeles Basin; USA, California, San Joaquin Valley DO - http://dx.doi.org/10.1016/j.watres.2016.01.004 ER - TY - JOUR T1 - Accretion time scale and impact history of Mars deduced from the isotopic systematics of Martian meteorites AN - 1793208316; 2016-047262 AB - High precision Sm-Nd isotopic analyses have been completed on a suite of 11 martian basaltic meteorites in order to better constrain the age of silicate differentiation on Mars associated with the formation of their mantle sources. These data are used to evaluate the merits and disadvantages of various mathematical approaches that have been employed in previous work on this topic. Ages determined from the Sm-Nd isotopic systematics of individual samples are strongly dependent on the assumed Nd isotopic composition of the bulk planet. This assumption is problematic given differences observed between the Nd isotopic composition of Earth and chondritic meteorites and the fact that these materials are both commonly used to represent bulk planetary Nd isotopic compositions. Ages determined from the slope of (super 146) Sm- (super 142) Nd whole rock isochrons are not dependent on the assumed (super 142) Nd/ (super 144) Nd ratio of the planet, but require the sample suite to be derived from complementary, contemporaneously-formed reservoirs. In this work, we present a mathematical expression that defines the age of formation of the source regions of such a suite of samples that is based solely on the slope of a (super 143) Nd- (super 142) Nd whole rock isochron and is also independent of any a priori assumptions regarding the bulk isotopic composition of the planet. This expression is also applicable to mineral isochrons and has been used to successfully calculate (super 143) Nd- (super 142) Nd model crystallization ages of early refractory solids as well as lunar samples. This permits ages to be obtained using only Nd isotopic measurements without the need for (super 147) Sm/ (super 144) Nd isotope dilution determinations. When used in conjunction with high-precision Nd isotopic measurements completed on martian meteorites this expression yields an age of formation of the martian basaltic meteorite source regions of 4504 + or - 6 Ma. Because the Sm-Nd model ages for the formation of martian source regions are commonly interpreted to record the age at which large scale mantle reservoirs formed during planetary differentiation associated with magma ocean solidification, the age determined here implies that magma ocean solidification occurred several tens of millions of years after the beginning of the Solar System. Recent thermal models, however, suggest that Mars-sized bodies cool rapidly in less than approximately 5 Ma after accretion ceases, even in the presence of a thick atmosphere. Assuming these models are correct, an extended period of accretion is necessary to provide a mechanism to keep portions of the martian mantle partially molten until 4504 Ma. Late accretional heating of Mars could either be associated with protracted accretion occurring at a quasi-steady state or alternatively be associated with a late giant impact. If this scenario is correct, then accretion of Mars-sized bodies takes up to 60 Ma and is likely to be contemporaneous with the core formation and possibly the onset of silicate differentiation. This further challenges the concept that isotopic equilibrium is attained during primordial evolution of planets, and may help to account for geochemical evidence implying addition of material into planetary interiors after core formation was completed. JF - Geochimica et Cosmochimica Acta AU - Borg, Lars E AU - Brennecka, Gregory A AU - Symes, Steven J K Y1 - 2016/02/15/ PY - 2016 DA - 2016 Feb 15 SP - 150 EP - 167 PB - Elsevier, New York, NY VL - 175 SN - 0016-7037, 0016-7037 KW - silicates KW - stony meteorites KW - isotopes KW - Martian meteorites KW - mantle KW - Mars KW - stable isotopes KW - meteorites KW - radioactive isotopes KW - mineral composition KW - dates KW - absolute age KW - Archean KW - rare earths KW - basaltic composition KW - accretion KW - Precambrian KW - isotope ratios KW - differentiation KW - cosmochemistry KW - impacts KW - achondrites KW - terrestrial planets KW - models KW - planets KW - Nd-144/Nd-142 KW - Sm/Nd KW - metals KW - planetary interiors KW - crystallization KW - core KW - neodymium KW - 03:Geochronology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793208316?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Accretion+time+scale+and+impact+history+of+Mars+deduced+from+the+isotopic+systematics+of+Martian+meteorites&rft.au=Borg%2C+Lars+E%3BBrennecka%2C+Gregory+A%3BSymes%2C+Steven+J+K&rft.aulast=Borg&rft.aufirst=Lars&rft.date=2016-02-15&rft.volume=175&rft.issue=&rft.spage=150&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2015.12.002 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 - 71 N1 - PubXState - NY N1 - Document feature - illus. incl. 5 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-06-02 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - absolute age; accretion; achondrites; Archean; basaltic composition; core; cosmochemistry; crystallization; dates; differentiation; impacts; isotope ratios; isotopes; mantle; Mars; Martian meteorites; metals; meteorites; mineral composition; models; Nd-144/Nd-142; neodymium; planetary interiors; planets; Precambrian; radioactive isotopes; rare earths; silicates; Sm/Nd; stable isotopes; stony meteorites; terrestrial planets DO - http://dx.doi.org/10.1016/j.gca.2015.12.002 ER - TY - JOUR T1 - Chlorite dissolution kinetics at pH 3-10 and temperature to 275 degrees C AN - 1789749574; 2016-042412 AB - Sheet silicates and clays are ubiquitous in geothermal environments. Their dissolution is of interest because this process contributes to scaling reactions along fluid pathways and alteration of fracture surfaces which could affect reservoir permeability. In order to better predict the geochemical impacts on long-term performance of engineered geothermal systems, we have measured chlorite dissolution and developed a generalized kinetic rate law applicable over an expanded range of solution pH and temperature. Chlorite, (Mg,Al,Fe) (sub 12) (Si,Al) (sub 8) O (sub 20) (OH) (sub 16) , commonly occurs in many geothermal host rocks as either a primary mineral or alteration product. A combination of new rate data from this study (collected using an Mg-rich chlorite variety, at 100-275 degrees C and pH >5.5) as well as all available published chlorite dissolution datasets results in a kinetic rate equation that is valid over temperatures of 25-275 degrees C and 3 < or = pH < or = 10: R=([1X10 (super -4) Xe (super -30/RT) Xa (super 0.74) (sub H+) ] + [4.7X10 (super -11) Xe (super -13/RT) ] + [1.5X10 (super -9) Xe (super -15/RT) Xa (super 0.43) (sub OH-) ])X(1-e (super Delta Gr/RT) ) The form of this equation, which includes a reaction affinity term to slow reaction as equilibrium is approached, can be incorporated into most existing reactive transport codes for use in prediction of rock-water interactions in engineered geothermal systems. Abstract Copyright (2016) Elsevier, B.V. JF - Chemical Geology AU - Smith, Megan M AU - Carroll, Susan A Y1 - 2016/02/10/ PY - 2016 DA - 2016 Feb 10 SP - 55 EP - 64 PB - Elsevier, Amsterdam VL - 421 SN - 0009-2541, 0009-2541 KW - silicates KW - alteration KW - magnesium KW - mass spectra KW - fluid phase KW - silicon KW - temperature KW - geothermal systems KW - chemical reactions KW - water-rock interaction KW - phase equilibria KW - aluminum KW - acidic composition KW - spectra KW - chlorite group KW - stoichiometry KW - kinetics KW - chemical ratios KW - pH KW - P-T conditions KW - alkaline earth metals KW - electron microscopy data KW - equations KW - solubility KW - TEM data KW - alkalic composition KW - ICP mass spectra KW - chlorite KW - geothermal reservoirs KW - metals KW - mathematical methods KW - sheet silicates KW - crystal chemistry KW - SEM data KW - 01B:Mineralogy of silicates KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789749574?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Chlorite+dissolution+kinetics+at+pH+3-10+and+temperature+to+275+degrees+C&rft.au=Smith%2C+Megan+M%3BCarroll%2C+Susan+A&rft.aulast=Smith&rft.aufirst=Megan&rft.date=2016-02-10&rft.volume=421&rft.issue=&rft.spage=55&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2015.11.022 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 - 51 N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-05-19 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - acidic composition; alkalic composition; alkaline earth metals; alteration; aluminum; chemical ratios; chemical reactions; chlorite; chlorite group; crystal chemistry; electron microscopy data; equations; fluid phase; geothermal reservoirs; geothermal systems; ICP mass spectra; kinetics; magnesium; mass spectra; mathematical methods; metals; P-T conditions; pH; phase equilibria; SEM data; sheet silicates; silicates; silicon; solubility; spectra; stoichiometry; TEM data; temperature; water-rock interaction DO - http://dx.doi.org/10.1016/j.chemgeo.2015.11.022 ER - TY - JOUR T1 - Timing and rates of Holocene normal faulting along the Black Mountains fault zone, Death Valley, USA AN - 1773799573; 2016-025798 AB - Alluvial fans displaced by normal faults of the Black Mountains fault zone at Badwater and Mormon Point in Death Valley were mapped, surveyed, and dated using optically stimulated luminescence (OSL) and (super 10) Be terrestrial cosmogenic nuclide (TCN) methods. Applying TCN methods to Holocene geomorphic surfaces in Death Valley is challenging because sediment flux is slow and complex. However, OSL dating produces consistent surface ages, yielding ages for a regionally recognized surface (Qg3a) of 4.5+ or -1.2 ka at Badwater and 7.0+ or -1.0 ka at Mormon Point. Holocene faults offsetting Qg3a yield horizontal slip rates directed toward 323 degrees of 0.8 +0.3/-0.2 mm/yr and 1.0+ or -0.2 mm/yr for Badwater and Mormon Point, respectively. These slip rates are slower than the approximately 2 mm/yr dextral slip rate of the southern end of the northern Death Valley fault zone and are half as fast as NNW-oriented horizontal rates documented for the Panamint Valley fault zone. This indicates that additional strain is transferred southwestward from northern Death Valley and Black Mountains fault zones onto the oblique-normal dextral faults of the Panamint Valley fault zone, which is consistent with published geodetic modeling showing that current opening rates of central Death Valley along the Black Mountains fault zone are about three times slower than for Panamint Valley. This suggests that less than half of the geodetically determined approximately 9-12 mm/yr of right-lateral shear across the region at the latitude of central Death Valley is accommodated by slip on well-defined faults and that distributed deformational processes take up the remainder of this slip transferred between the major faults north of the Garlock fault. JF - Lithosphere AU - Frankel, Kurt L AU - Owen, Lewis A AU - Dolan, James F AU - Knott, Jeffrey R AU - Lifton, Zachery M AU - Finkel, Robert C AU - Wasklewicz, Thad Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 3 EP - 22 PB - Geological Society of America, Boulder, CO VL - 8 IS - 1 SN - 1941-8264, 1941-8264 KW - lower Holocene KW - Basin and Range Province KW - Death Valley National Park KW - national parks KW - cosmogenic elements KW - slip rates KW - erosion features KW - California KW - Death Valley KW - absolute age KW - faults KW - North America KW - boulders KW - Quaternary KW - middle Holocene KW - erosion surfaces KW - clastic sediments KW - lithosphere KW - Pleistocene KW - earthquakes KW - United States KW - neutron activation analysis data KW - isotopes KW - erosion KW - Eastern California shear zone KW - Black Mountains fault zone KW - thermoluminescence KW - Holocene KW - upper Pleistocene KW - Cenozoic KW - Inyo County California KW - radioactive isotopes KW - optically stimulated luminescence KW - dates KW - normal faults KW - sediments KW - alkaline earth metals KW - Mormon Point KW - Be-10 KW - Great Basin KW - Badwater Fan KW - rates KW - public lands KW - luminescence KW - metals KW - alluvial fans KW - Mormon Point Formation KW - scarps KW - beryllium KW - 24:Quaternary geology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773799573?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Timing+and+rates+of+Holocene+normal+faulting+along+the+Black+Mountains+fault+zone%2C+Death+Valley%2C+USA&rft.au=Frankel%2C+Kurt+L%3BOwen%2C+Lewis+A%3BDolan%2C+James+F%3BKnott%2C+Jeffrey+R%3BLifton%2C+Zachery+M%3BFinkel%2C+Robert+C%3BWasklewicz%2C+Thad&rft.aulast=Frankel&rft.aufirst=Kurt&rft.date=2016-02-01&rft.volume=8&rft.issue=1&rft.spage=3&rft.isbn=&rft.btitle=&rft.title=Lithosphere&rft.issn=19418264&rft_id=info:doi/10.1130%2FL464.1 L2 - http://lithosphere.gsapubs.org/ 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 the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 94 N1 - PubXState - CO N1 - Document feature - illus. incl. strat. col., 4 tables, geol. sketch maps N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - absolute age; alkaline earth metals; alluvial fans; Badwater Fan; Basin and Range Province; Be-10; beryllium; Black Mountains fault zone; boulders; California; Cenozoic; clastic sediments; cosmogenic elements; dates; Death Valley; Death Valley National Park; earthquakes; Eastern California shear zone; erosion; erosion features; erosion surfaces; faults; Great Basin; Holocene; Inyo County California; isotopes; lithosphere; lower Holocene; luminescence; metals; middle Holocene; Mormon Point; Mormon Point Formation; national parks; neutron activation analysis data; normal faults; North America; optically stimulated luminescence; Pleistocene; public lands; Quaternary; radioactive isotopes; rates; scarps; sediments; slip rates; thermoluminescence; United States; upper Pleistocene DO - http://dx.doi.org/10.1130/L464.1 ER - TY - JOUR T1 - Unearthing the Antibacterial Mechanism of Medicinal Clay: A Geochemical Approach to Combating Antibiotic Resistance. AN - 1760891162; 26743034 AB - Natural antibacterial clays, when hydrated and applied topically, kill human pathogens including antibiotic resistant strains proliferating worldwide. Only certain clays are bactericidal; those containing soluble reduced metals and expandable clay minerals that absorb cations, providing a capacity for extended metal release and production of toxic hydroxyl radicals. Here we show the critical antibacterial components are soluble Fe(2+) and Al(3+) that synergistically attack multiple cellular systems in pathogens normally growth-limited by Fe supply. This geochemical process is more effective than metal solutions alone and provides an alternative antibacterial strategy to traditional antibiotics. Advanced bioimaging methods and genetic show that Al(3+) misfolds cell membrane proteins, while Fe(2+) evokes membrane oxidation and enters the cytoplasm inflicting hydroxyl radical attack on intracellular proteins and DNA. The lethal reaction precipitates Fe(3+)-oxides as biomolecular damage proceeds. Discovery of this bactericidal mechanism demonstrated by natural clays should guide designs of new mineral-based antibacterial agents. JF - Scientific reports AU - Morrison, Keith D AU - Misra, Rajeev AU - Williams, Lynda B AD - Biosciences and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA. ; School of Life Sciences, Arizona State University, Tempe, AZ 85287 USA. ; School of Earth &Space Exploration, Arizona State University, Tempe, AZ 85287 USA. Y1 - 2016/01/08/ PY - 2016 DA - 2016 Jan 08 SP - 19043 VL - 6 KW - Aluminum Silicates KW - 0 KW - Anti-Bacterial Agents KW - Cations, Divalent KW - Escherichia coli Proteins KW - Membrane Proteins KW - clay KW - 1302-87-0 KW - Hydroxyl Radical KW - 3352-57-6 KW - Hydrogen Peroxide KW - BBX060AN9V KW - Aluminum KW - CPD4NFA903 KW - Iron KW - E1UOL152H7 KW - Index Medicus KW - Hydroxyl Radical -- metabolism KW - Hydrogen-Ion Concentration KW - Humans KW - Gene Expression KW - Escherichia coli -- genetics KW - Salmonella typhimurium -- drug effects KW - Membrane Proteins -- genetics KW - Oxidation-Reduction KW - Escherichia coli -- drug effects KW - Methicillin-Resistant Staphylococcus aureus -- growth & development KW - Pseudomonas aeruginosa -- drug effects KW - Mud Therapy -- methods KW - Salmonella typhimurium -- genetics KW - Microbial Sensitivity Tests KW - Staphylococcus epidermidis -- growth & development KW - Staphylococcus epidermidis -- genetics KW - Pseudomonas aeruginosa -- genetics KW - Pseudomonas aeruginosa -- growth & development KW - Membrane Proteins -- chemistry KW - Hydrogen Peroxide -- metabolism KW - Methicillin-Resistant Staphylococcus aureus -- genetics KW - Staphylococcus epidermidis -- drug effects KW - Hydroxyl Radical -- chemistry KW - Methicillin-Resistant Staphylococcus aureus -- drug effects KW - Protein Folding -- drug effects KW - Membrane Proteins -- antagonists & inhibitors KW - Salmonella typhimurium -- growth & development KW - Escherichia coli -- growth & development KW - Hydrogen Peroxide -- chemistry KW - Escherichia coli Proteins -- chemistry KW - Escherichia coli Proteins -- antagonists & inhibitors KW - Drug Resistance, Bacterial -- drug effects KW - Aluminum Silicates -- pharmacology KW - Aluminum Silicates -- chemistry KW - Iron -- pharmacology KW - Anti-Bacterial Agents -- chemistry KW - Aluminum -- pharmacology KW - Drug Resistance, Bacterial -- genetics KW - Aluminum -- chemistry KW - Iron -- chemistry KW - Anti-Bacterial Agents -- pharmacology KW - Escherichia coli Proteins -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1760891162?accountid=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=Unearthing+the+Antibacterial+Mechanism+of+Medicinal+Clay%3A+A+Geochemical+Approach+to+Combating+Antibiotic+Resistance.&rft.au=Morrison%2C+Keith+D%3BMisra%2C+Rajeev%3BWilliams%2C+Lynda+B&rft.aulast=Morrison&rft.aufirst=Keith&rft.date=2016-01-08&rft.volume=6&rft.issue=&rft.spage=19043&rft.isbn=&rft.btitle=&rft.title=Scientific+reports&rft.issn=2045-2322&rft_id=info:doi/10.1038%2Fsrep19043 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-12-13 N1 - Date created - 2016-01-08 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Appl Environ Microbiol. 2003 Apr;69(4):2313-20 [12676715] Environ Geochem Health. 2014 Aug;36(4):613-31 [24258612] Free Radic Biol Med. 2004 Feb 1;36(3):380-7 [15036357] Mol Microbiol. 2004 May;52(3):613-9 [15101969] Appl Environ Microbiol. 1981 Aug;42(2):325-35 [7025758] Proc Natl Acad Sci U S A. 1984 Jul;81(14):4490-4 [6087326] Science. 1988 Apr 29;240(4852):640-2 [2834821] Biochem J. 1989 Mar 1;258(2):617-20 [2706005] Appl Microbiol Biotechnol. 1999 Jun;51(6):730-50 [10422221] Mol Microbiol. 2005 Jun;56(5):1119-28 [15882407] BMC Microbiol. 2005;5:53 [16202124] Environ Sci Technol. 2006 Mar 1;40(5):1556-65 [16568770] Biotechniques. 2006 Apr;40(4):433-4, 436, 438 passim [16629389] Nat Rev Microbiol. 2013 Jun;11(6):371-84 [23669886] J Biochem. 1996 Nov;120(5):895-900 [8982853] J Water Health. 2015 Mar;13(1):42-53 [25719464] J Inorg Biochem. 1999 Aug 30;76(2):81-8 [10612060] Nature. 2000 Aug 17;406(6797):775-81 [10963607] Appl Environ Microbiol. 2002 Dec;68(12):6256-62 [12450850] J Bacteriol. 2007 Dec;189(23):8746-9 [17905994] Nat Chem Biol. 2008 May;4(5):278-86 [18421291] Environ Microbiol. 2010 Jun;12(6):1384-90 [20353438] Environ Sci Technol. 2011 Apr 15;45(8):3768-73 [21413758] Res Microbiol. 2011 May;162(4):436-45 [21349327] Methods Enzymol. 1990;186:464-78 [1978225] Biometals. 1996 Jul;9(3):311-6 [8696081] FEMS Microbiol Rev. 2003 Jun;27(2-3):215-37 [12829269] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/srep19043 ER - TY - JOUR T1 - Discovery of a major intra-oceanic subduction event revealed beneath the southern Indian Ocean AN - 1873350829; 2017-013881 AB - Global seismic tomography has unveiled numerous fast anomalies in the mantle that have been interpreted of subducted tectonic plates that have sunken deep into the Earth. Images of slabs of the ancient variety, such as the Farallon slab beneath North America, provide us with powerful information about ancient plate tectonic and dynamic processes. A new global image (Simmons et al. 2015, GRL) has recently revealed surprisingly positioned slab-like anomalies beneath the Southern Indian Ocean spanning depths from the upper mantle transition zone near the Southeast Indian Ridge (SEIR) to the deep mantle beneath the Indian Ocean and Australia. Portions of the slab anomalies bear a striking resemblance to the well-known Farallon slab anomalies and thus point to the existence of an ancient subduction event that was previous unrecognized. Based on the image and additional geoscientific observations, we postulate that the structure is an oceanic plate that sank into the mantle along a 7000-km intra-oceanic subduction zone that migrated southwestward across the ancient Tethys Ocean in the Mesozoic Era, perhaps beginning prior to 200 Ma. We refer to this new feature as the Southeast Indian Slab (or SEIS). Slab material still trapped in the transition zone is positioned near the former edge of East Gondwana ca. 140 Ma suggesting that subduction terminated near the margin of the ancient continent prior to breakup and subsequent dispersal of its subcontinents. The implications of this event are multifold including the need for re-evaluation of ancient global plate tectonic history and the likely existence of other intra-oceanic subduction events that have yet to be recognized or fully developed in global plate reconstructions. JF - Abstracts with Programs - Geological Society of America AU - Simmons, Nathan A AU - Myers, Stephen C AU - Johannesson, Gardar AU - Matzel, Eric AU - Grand, Stephen P AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 177 EP - 1 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350829?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Discovery+of+a+major+intra-oceanic+subduction+event+revealed+beneath+the+southern+Indian+Ocean&rft.au=Simmons%2C+Nathan+A%3BMyers%2C+Stephen+C%3BJohannesson%2C+Gardar%3BMatzel%2C+Eric%3BGrand%2C+Stephen+P%3BAnonymous&rft.aulast=Simmons&rft.aufirst=Nathan&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 - Merits of pressure and geochemical data as indicators of CO (sub 2) /brine leakage into a heterogeneous, sedimentary aquifer AN - 1869031982; 2017-011505 AB - Many different monitoring techniques have been evaluated both synthetically and from the field to better understand the spatial and temporal movement of CO (sub 2) and pressure plumes within and above a CO (sub 2) storage reservoir. The distance between the leak source and the nearest monitoring well or sensor location may deem certain monitoring techniques as an unviable detection method. It is important to determine the efficacy of the different possible monitoring techniques with uncertain leak locations to design optimal monitoring protocols to ensure non-endangerment to drinking waters. The purpose of this study is to evaluate and compare the reliability of above-zone pressure and groundwater solution chemistry monitoring as leak diagnostics. We generate synthetic pressure, total dissolved solids (TDS) and pH data via many subsurface realizations and leak simulations that are based on a specific part of the High Plains Aquifer, with an average well density of 1 per km (super 2) (Carroll et al., 2014). We use a simulation approach to explore how the following principal uncertainties influence the three signals to correctly diagnose a CO (sub 2) /brine leak: The heterogeneity of the aquifer flow properties. This study uses two-facies heterogeneity models (sand/shale) to evaluate the effects of heterogeneity on spatial and temporal scales of the signals. The distance between the source leak and the monitoring well. It is possible that unknown abandoned wells or faults could serve as random leak locations unknown a priori (Gal et al., 2013). The leakage rates of CO (sub 2) and brine. The magnitude and duration of the leak will be one of the main determiners of the extent of the three signals. We explore a range of CO (sub 2) injection periods and wellbore permeability (Wainwright et al., 2013). Detection likelihoods are calculated to describe how frequently pressure, TDS, and pH signals will coincide with a leak for observations made at different distances and times from the initiation of the CO (sub 2) /brine leakage. The pressure signal gives a more spatially extensive signal than either TDS or pH. When considering the samples that only experience the highest leakage volumes, there is a 50% likelihood of detecting a pressure change 400 m away at times > or =30 years as seem. However, the TDS and pH detection likelihoods are or =30 years. JF - Abstracts with Programs - Geological Society of America AU - Trainor-Guitton, Whitney AU - Sun, Yunwei AU - Mansoor, Kayyum AU - Carroll, Susan AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 4 EP - 8 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 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869031982?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Merits+of+pressure+and+geochemical+data+as+indicators+of+CO+%28sub+2%29+%2Fbrine+leakage+into+a+heterogeneous%2C+sedimentary+aquifer&rft.au=Trainor-Guitton%2C+Whitney%3BSun%2C+Yunwei%3BMansoor%2C+Kayyum%3BCarroll%2C+Susan%3BAnonymous&rft.aulast=Trainor-Guitton&rft.aufirst=Whitney&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 - Modeling of chemically-induced fracture permeability evolution and its impact on geothermal energy production AN - 1869031644; 2017-011502 AB - Fluid-rock chemical interactions may potentially modify fracture permeability, and therefore influence long-term performance of enhanced geothermal system (EGS) reservoirs. Coupled fluid flow, heat transfer and reactive transport processes in fractured geothermal formations are controlled by the interplay between mineral reaction kinetics, fracture flow and matrix diffusion, leading to increase or decrease in fracture permeability, and hence flow magnitude through the fracture. Understanding and quantifying processes that affect fracture permeability evolution are critical for prediction of geothermal energy production, and may provide the key to sustainable productivity. In order to improve understanding of fluid-rock chemical interactions in fractured rocks we develop a discrete fracture model (DFM) in the GEOS framework (a LLNL-developed, massively parallel and multi-physics simulation code) to simulate fracture permeability evolution due to mineral dissolution/precipitation under geothermal reservoir conditions. In this study we apply the discrete fracture model to simulate the thermal-hydrologic-chemical (THC) behaviors of fractured geothermal reservoirs, and in particular examine effects of quartz dissolution/precipitation on overall heat recovery. Numerical results show that the strong temperature dependence of quartz reactivity and equilibrium concentration can significantly influence fracture permeability evolution. It is also found that when the injection fluid is supersaturated with respect to quartz, precipitation occurs near the injection well, resulting in a reduction in fracture aperture and energy recovery. However, if a quartz-undersaturated fluid is injected into fractured formations, dissolution dominates along fractures, and enhances fracture permeability and causes more efficient energy recovery process. Insight gained from this work will not only help develop a more accurate description of chemically-induced fracture evolution in fractured geothermal reservoirs, but also provide a useful basis for upscaling flow and reactive transport behaviors from discrete fracture to field scales. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - Abstracts with Programs - Geological Society of America AU - Hao, Yue AU - Settgast, Randolph R AU - Tompson, Andrew F B AU - Fu, Pengcheng AU - Morris, Joseph P AU - Ryerson, Frederick J AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 4 EP - 5 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869031644?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Modeling+of+chemically-induced+fracture+permeability+evolution+and+its+impact+on+geothermal+energy+production&rft.au=Hao%2C+Yue%3BSettgast%2C+Randolph+R%3BTompson%2C+Andrew+F+B%3BFu%2C+Pengcheng%3BMorris%2C+Joseph+P%3BRyerson%2C+Frederick+J%3BAnonymous&rft.aulast=Hao&rft.aufirst=Yue&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 - Discovery of a major intra-oceanic subduction event revealed beneath the southern Indian Ocean AN - 1861112980; 787361-95 AB - Global seismic tomography has unveiled numerous fast anomalies in the mantle that have been interpreted of subducted tectonic plates that have sunken deep into the Earth. Images of slabs of the ancient variety, such as the Farallon slab beneath North America, provide us with powerful information about ancient plate tectonic and dynamic processes. A new global image (Simmons et al. 2015, GRL) has recently revealed surprisingly positioned slab-like anomalies beneath the Southern Indian Ocean spanning depths from the upper mantle transition zone near the Southeast Indian Ridge (SEIR) to the deep mantle beneath the Indian Ocean and Australia. Portions of the slab anomalies bear a striking resemblance to the well-known Farallon slab anomalies and thus point to the existence of an ancient subduction event that was previous unrecognized.aBased on the image and additional geoscientific observations, we postulate that the structure is an oceanic plate that sank into the mantle along a 7000-km intra-oceanic subduction zone that migrated southwestward across the ancient Tethys Ocean in the Mesozoic Era, perhaps beginning prior to 200 Ma. We refer to this new feature as the Southeast Indian Slab (or SEIS). Slab material still trapped in the transition zone is positioned near the former edge of East Gondwana ca. 140 Ma suggesting that subduction terminated near the margin of the ancient continent prior to breakup and subsequent dispersal of its subcontinents. The implications of this event are multifold including the need for re-evaluation of ancient global plate tectonic history and the likely existence of other intra-oceanic subduction events that have yet to be recognized or fully developed in global plate reconstructions. JF - Abstracts with Programs - Geological Society of America AU - Simmons, Nathan A AU - Myers, Stephen C AU - Johannesson, Gardar AU - Matzel, Eric AU - Grand, Stephen P AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 177 EP - 1 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/1861112980?accountid=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=Discovery+of+a+major+intra-oceanic+subduction+event+revealed+beneath+the+southern+Indian+Ocean&rft.au=Simmons%2C+Nathan+A%3BMyers%2C+Stephen+C%3BJohannesson%2C+Gardar%3BMatzel%2C+Eric%3BGrand%2C+Stephen+P%3BAnonymous&rft.aulast=Simmons&rft.aufirst=Nathan&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 - Geochemistry at interfaces: In search of a new modelling approach AN - 1861112337; 782782-54 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Zavarin, Mavrik AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 3654 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861112337?accountid=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=Geochemistry+at+interfaces%3A+In+search+of+a+new+modelling+approach&rft.au=Zavarin%2C+Mavrik%3BAnonymous&rft.aulast=Zavarin&rft.aufirst=Mavrik&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=3654&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/3654.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 - (super 10) be exposure dating of Holocene moraines in the Sierra Nevada, California AN - 1861111816; 787347-82 AB - Constraining the extent and timing of Holocene glaciations is critical to addressing standing hypotheses that ascribe climatic fluctuations to changes in atmospheric and oceanic circulation patterns, or anthropogenic forcing. In the terrestrial record, such constraint typically relies on chronologies obtained from 10Be exposure dating of moraine deposits. However, the short exposure time of Holocene moraines, particularly those formed during the Little Ice Age (LIA), makes obtaining precise chronologies extremely challenging. To date, only a handful of LIA deposits in three locations (New Zealand, Swiss Alps, and Peruvian Andes) have been dated with 10Be. Here, we report 10Be (and supporting 26Al) exposure ages from LIA moraines from multiple sites in the Sierra Nevada (Lyell, Maclure, Palisade, and Conness glaciers). Our Sierran LIA record is comparable to published results from other locations and supports a globally synchronous LIA deglaciation. This result is consistent with the contention that the LIA was terminated by anthropogenically-driven warming. We also report preliminary results from several older neoglacial moraines present at these sites. Chronology from the neoglacial deposits will be used to test whether the timing of the return to glacial conditions in the Sierras correlates to a southward shift in the Intertropical Convergence Zone, which has been hypothesized to increase El Nino-like conditions in the Pacific Ocean. This record should be ideal for testing this hypothesis since precipitation in the Sierras is highly sensitive to El Nino conditions. JF - Abstracts with Programs - Geological Society of America AU - Hidy, Alan J AU - Zimmerman, Susan H AU - Finkel, Robert C AU - Schaefer, Joerg M AU - Clark, Doug AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 74 EP - 15 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/1861111816?accountid=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=%28super+10%29+be+exposure+dating+of+Holocene+moraines+in+the+Sierra+Nevada%2C+California&rft.au=Hidy%2C+Alan+J%3BZimmerman%2C+Susan+H%3BFinkel%2C+Robert+C%3BSchaefer%2C+Joerg+M%3BClark%2C+Doug%3BAnonymous&rft.aulast=Hidy&rft.aufirst=Alan&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 deep mantle seismic tomography and surface/near surface tectonics; a new global tectonic revolution? AN - 1861110984; 787344-91 AB - Since the 'Plate Tectonic Revolution' some 40-50 years ago, 'traditional' plate tectonic reconstructions notably have included oceanic regions, as well as the Circumpacific, Alpine-Himalayan, and older orogenic regions preserved in continents. Simultaneous independent revolutions in transportation, imagery, communication, measurement, and presentation provide new ways to look at the Earth and its history. Recent studies provocatively linking deep mantle seismic tomography and surface-near surface plate tectonics include: L. Kellogg et al. (1999, 2013) on global interaction of a hot abyssal mantle layer with deeply subducted lithospheric.slabs; Vandermeer et al. (2012) on Circumpacific deep seismic structure and exotic terranes that originated in a pre-Pacific Panthalassa ocean; Sigloch and Mihalynuk (2013) on collision of long-lived west-dipping intra-oceanic subduction zone(s) with the North American Cordillera (cf., Moores, et al., 1970, 1998, 2002; and Schweickert and Cowan; 1975); Simmons et al. (2015) on the presence of a long-lived north-dipping subducted slab beneath the Southeast Indian Ocean, suggesting collision of one or more exotic terranes with Gondwana prior to opening of the Indian Ocean over the previously subducted slab(s); and Wu et al. (2016) on previous existence of 'East Asian Sea' plates, between the Tethyan and Pacific realms. These and other analyses provide fresh insight into and models of the tectonic history of Earth regions that sharply differ from 'traditional' plate tectonic models. The mid-lower mantle preserves a record of Earth's tectonic activity extending into Earth's past well beyond the < or =200 Ma record of Earth's oceans. Integration of the mantle's tectonic record with that from shallow/surface regions may result in a new revolution in Global Tectonics. JF - Abstracts with Programs - Geological Society of America AU - Moores, Eldridge M AU - Simmons, Nathan A AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 55 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/1861110984?accountid=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+deep+mantle+seismic+tomography+and+surface%2Fnear+surface+tectonics%3B+a+new+global+tectonic+revolution%3F&rft.au=Moores%2C+Eldridge+M%3BSimmons%2C+Nathan+A%3BAnonymous&rft.aulast=Moores&rft.aufirst=Eldridge&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 - Accurate self-diffusion coefficients of hydrogen in olivine and implications for mantle electrical conductivity AN - 1861091592; 782769-14 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Novella, Davide AU - Frane, Wyatt L D U AU - Jacobsen, Benjamin AU - Weber, Peter K AU - Ryerson, Frederick J AU - Tyburczy, James A AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 2314 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861091592?accountid=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=Accurate+self-diffusion+coefficients+of+hydrogen+in+olivine+and+implications+for+mantle+electrical+conductivity&rft.au=Novella%2C+Davide%3BFrane%2C+Wyatt+L+D+U%3BJacobsen%2C+Benjamin%3BWeber%2C+Peter+K%3BRyerson%2C+Frederick+J%3BTyburczy%2C+James+A%3BAnonymous&rft.aulast=Novella&rft.aufirst=Davide&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=2314&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/2314.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 - Exploring silicate thermodynamics and conductivity at extreme conditions with laser-driven dynamic compression AN - 1861091090; 782766-84 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Millot, M AU - Fratanduono, D E AU - Dubrovinskaia, N AU - Cernok, A AU - Blaha, S AU - Dubrovinsky, L S AU - Celliers, P M AU - Collins, G W AU - Hamel, S AU - Kraus, R AU - Spaulding, D K AU - Jeanloz, R AU - Eggert, J H AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 2084 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861091090?accountid=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=Exploring+silicate+thermodynamics+and+conductivity+at+extreme+conditions+with+laser-driven+dynamic+compression&rft.au=Millot%2C+M%3BFratanduono%2C+D+E%3BDubrovinskaia%2C+N%3BCernok%2C+A%3BBlaha%2C+S%3BDubrovinsky%2C+L+S%3BCelliers%2C+P+M%3BCollins%2C+G+W%3BHamel%2C+S%3BKraus%2C+R%3BSpaulding%2C+D+K%3BJeanloz%2C+R%3BEggert%2C+J+H%3BAnonymous&rft.aulast=Millot&rft.aufirst=M&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=2084&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/2084.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 - Uniform yet distinct isotopic reservoirs in the early Solar System: Evidence from Er and Yb isotopes in refractory inclusions AN - 1861091076; 782774-46 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Shollenberger, Q R AU - Brennecka, G A AU - Borg, L E AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 2846 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861091076?accountid=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=Uniform+yet+distinct+isotopic+reservoirs+in+the+early+Solar+System%3A+Evidence+from+Er+and+Yb+isotopes+in+refractory+inclusions&rft.au=Shollenberger%2C+Q+R%3BBrennecka%2C+G+A%3BBorg%2C+L+E%3BAnonymous&rft.aulast=Shollenberger&rft.aufirst=Q&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=2846&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/2846.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 - Controls on anthropogenic radionuclide distribution in the Sellafield near-shore AN - 1861090998; 782771-95 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Ray, D AU - Morris, K AU - Livens, F R AU - Kersting, A AU - Zavarin, M AU - Begg, J AU - Joseph, C AU - Zhao, P AU - Law, G T W AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 2595 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861090998?accountid=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=Controls+on+anthropogenic+radionuclide+distribution+in+the+Sellafield+near-shore&rft.au=Ray%2C+D%3BMorris%2C+K%3BLivens%2C+F+R%3BKersting%2C+A%3BZavarin%2C+M%3BBegg%2C+J%3BJoseph%2C+C%3BZhao%2C+P%3BLaw%2C+G+T+W%3BAnonymous&rft.aulast=Ray&rft.aufirst=D&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=2595&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/2595.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 - New chronology for the southern Kalahari Group sediments with implications for sediment-cycle dynamics and early hominin occupation AN - 1861083312; 784689-61 AB - Kalahari Group sediments accumulated in the Kalahari , which started forming during the breakup of Gondwana in the arly Cretaceous. These sediments cover an extensive part of southern Africa and form a low-relief landscape. Current models assume that the Kalahari Group accumulated throughout the entire Cenozoic. However, chronology has been restricted to early-middle Cenozoic biostratigraphic correlations and to OSL dating of only the past approximately 300 a. We present a new chronological framework that reveals a dynamic nature of sedimentation in the southern Kalahari. Cosmogenic burial ages obtained from a 55 m section of Kalahari Group sediments from the Mamatwan Mine, southern Kalahari, indicate that the majority of deposition at this location occurred rapidly at 1-1.2 Ma. This Pleistocene sequence overlies the Archaean basement, forming a significant hiatus that permits the possibility of many Phanerozoic cycles of deposition and erosion no longer preserved in the sedimentary record. Calcretes that cement conglomerates and sands throughout the sequence ange between 300-500 a. Our data also establish the existence of a shallow early-middle Pleistocene water body that persisted for >450 a prior to this rapid period of deposition. Evidence from neighboring archaeological excavations in southern Africa suggests an association of high-density hominin occupation with this water body. JF - International Geological Congress, Abstracts = Congres Geologique International, Resumes AU - Matmon, A AU - Hidy, A J AU - Vainer, S AU - Crouvi, O AU - Fink, D AU - Erel, Y AU - ASTER, Team AU - Horwitz, L K AU - Chazan, M AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract 5551 PB - [International Geological Congress], [location varies] VL - 35 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861083312?accountid=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=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.atitle=New+chronology+for+the+southern+Kalahari+Group+sediments+with+implications+for+sediment-cycle+dynamics+and+early+hominin+occupation&rft.au=Matmon%2C+A%3BHidy%2C+A+J%3BVainer%2C+S%3BCrouvi%2C+O%3BFink%2C+D%3BErel%2C+Y%3BASTER%2C+Team%3BHorwitz%2C+L+K%3BChazan%2C+M%3BAnonymous&rft.aulast=Matmon&rft.aufirst=A&rft.date=2016-01-01&rft.volume=35&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.issn=&rft_id=info:doi/ L2 - http://www.americangeosciences.org/sites/default/files/igc/5551.pdf LA - English DB - GeoRef N1 - Conference title - 35th international geological congress 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 International Geological Congress Organizational Committee N1 - Last updated - 2017-01-24 N1 - CODEN - IGABBY ER - TY - JOUR T1 - Reconciling evidence from outcrops and deep-lake sediments; the conundrum of oxygen isotopes in glacial-era Mono Lake, California AN - 1855320726; 2017-002047 AB - Hydrologically closed lakes, particularly those in arid regions, are exceptional archives of past climatic changes, due to their sensitivity to the balance of precipitation and evaporation. Records of absolute past lake levels, from nearshore facies, berms, wave-cut cliffs and terraces, and high-resolution proxy records from sediment cores have different strengths and weaknesses, but ultimately they must tell the same story about the history of the lake basin. To achieve this goal, indirect proxy records must be examined and interpreted in the context of the absolute changes recorded in stratigraphy and geomorphology. Mono Lake, California is a highly sensitive closed-basin lake on the eastern (leeward) side of the Sierra Nevada, and has been shown to preserve exceptional paleoclimate records. Ground-breaking study of the Wilson Creek Formation (WCF) facies in outcrops around the basin and their relation to surficial features form the basis of the absolute lake-level curve for the last glacial period, Marine Isotope Stages (MIS) 4-3-2 by K. Lajoie (unpub. UC Berkeley Ph.D. dissertation, 1968). Interpretation of the carbonate content of the correlative deep-lake sediments in the context of Lajoie's lake-level curve provided a high-resolution record of lake-level for that period (Zimmerman et al. 2011 GSAB v123 p 2320). Interpretation of oxygen isotopes on carbonates from the same samples in the framework of Lajoie's curve shows the opposite relationship between d18O and lake level between approximately 65 and 25 ka than that predicted by simple precipitation-evaporation processes, shifting heavier in times of rising lake level, rather than lighter. One possible explanation for this relationship might be changes in the balance of isotopically heavy precipitation from tropical sources. Recent work on shorelines and nearshore sediments of the last glacial maximum and deglacial period, including the last highstand, suggests the relationship between lake level and oxygen-isotope composition of carbonates likely changes through time, and may be dependent on the relative volume of a change in lake-level, the systematics of carbonate precipitation, and variations in the source of water to the lake, including seasonality of precipitation and meltwater run-off from Sierran glaciers. JF - Abstracts with Programs - Geological Society of America AU - Zimmerman, Susan Herrgesell AU - Ali, Guleed A H AU - Hemming, Sidney R AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 42 EP - 1 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855320726?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reconciling+evidence+from+outcrops+and+deep-lake+sediments%3B+the+conundrum+of+oxygen+isotopes+in+glacial-era+Mono+Lake%2C+California&rft.au=Zimmerman%2C+Susan+Herrgesell%3BAli%2C+Guleed+A+H%3BHemming%2C+Sidney+R%3BAnonymous&rft.aulast=Zimmerman&rft.aufirst=Susan&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 - 2017-01-05 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - The last glacial maximum in tropical East Africa AN - 1832728241; 2016-092362 AB - The mechanisms which influenced the last glacial to interglacial transition (i.e., the last termination) and the collapse of most Northern Hemisphere ice sheets are still not well known. As proposed by Milankovitch, changes in summer insolation at high northern latitudes are generally regarded as the pacemaker of glacial-interglacial cycles. However, Denton et al. (2010) point out that rising summer insolation does not always influence terminations and some terminations occur during relatively low-amplitude insolation changes. Other proposed mechanisms for the last termination include changes in atmospheric CO (sub 2) and tropical processes, such as changes in the western Pacific warm pool. We suggest that tropical glaciers provide a means to evaluate various hypotheses for the causes of the last termination. Tropical glaciers are far from the local influences of the large ice sheets and many respond primarily to changes in air temperature. We present a record of glacier fluctuations in the Rwenzori Mountains ( approximately 1 degrees N, 30 degrees E) of tropical East Africa. Three nested moraine sets document Rwenzori glacier fluctuations during the Last Glacial Maximum. We anticipate new (super 10) Be ages on the outermost of the three moraines. The moraine just proximal to the outermost is dated at approximately 23.4 ka. Subsequently, at approximately 20.1 ka, a moraine was deposited that crosscuts the older moraines and marks the largest glacier extent during the Last Glacial Maximum. A comparison of these glacier fluctuations with tropical east African climate proxy records shows that the Rwenzori glaciers were extensive contemporaneously with dry and cold conditions, indicating a dominant influence of temperature on the glacier mass balance. We compare these glacier fluctuations with changes in summer insolation at high northern latitudes, as well as with other hypothesized causes of the last termination, such as changes in atmospheric CO (sub 2) and the western Pacific warm pool. JF - Abstracts with Programs - Geological Society of America AU - Kelly, Meredith A AU - Jackson, Margaret S AU - Russell, James M AU - Howley, Jennifer A AU - Zimmerman, Susan H AU - Doughty, Alice M AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 25 EP - 2 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 2 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832728241?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+last+glacial+maximum+in+tropical+East+Africa&rft.au=Kelly%2C+Meredith+A%3BJackson%2C+Margaret+S%3BRussell%2C+James+M%3BHowley%2C+Jennifer+A%3BZimmerman%2C+Susan+H%3BDoughty%2C+Alice+M%3BAnonymous&rft.aulast=Kelly&rft.aufirst=Meredith&rft.date=2016-01-01&rft.volume=48&rft.issue=2&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/10.1130%2Fabs%2F2016NE-272831 LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 51st annual meeting 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 - 2016-10-27 N1 - CODEN - GAAPBC DO - http://dx.doi.org/10.1130/abs/2016NE-272831 ER - TY - JOUR T1 - Holocene paleoclimate history of Fallen Leaf Lake, CA, from geochemistry and sedimentology of well-dated sediment cores AN - 1832723437; 2016-091704 AB - Millennial-scale shifts in aridity patterns have been documented during the Holocene in the western United States, yet the precise timing, severity, and regional extent of these shifts prompts further study. We present lake sediment core data from Fallen Leaf Lake, a subalpine system at the southern end of the Lake Tahoe basin for which 80% of the contemporary inflow is derived from snowpack delivered by Pacific frontal storm systems. A high quality age model has been constructed using (super 14) C ages on plant macrofossils, (super 210) Pb, and the Tsoyowata tephra datum (7.74-7.95 cal kyr BP). One core captures the transition from the Late Tioga-younger Dryas glaciolacustrine package to laminated opaline clay at 11.48 cal kyr BP. Early Holocene sedimentation rates are relatively high ( approximately 1.9 mm/year) and cooler winter temperatures are inferred by the presence of pebbles interpreted to be transported out into the lake via shore ice. There is a geochemically distinct interval from approximately 4.71 to 3.65 cal kyr BP that is interpreted as a late Holocene neopluvial, characterized by depleted delta (super 13) C and lower C:N that point to reduced runoff of terrigenous organic matter, increased winter precipitation, and increased algal productivity. The largest Holocene signal in the cores occurs at the end of the neopluvial, at 3.65 cal kyr BP, and marks a shift into a climate state with variable precipitation, yet is overall more arid than the neopluvial. This new climate state persists for approximately 3 ka, until the Little Ice Age. Low sedimentation rates (0.5 mm/year), the homogeneous opaline sediment, and steadily increasing contributions of terrestrial vs. algal organic matter in these cores suggest that the lowstand state of Fallen Leaf Lake may have been the norm from 3.65 to 0.55 cal kyr BP, punctuated by short term high precipitation years or multi-year intervals capable of rapid short duration lake level rise. Fallen Leaf Lake is strongly influenced by changes in winter precipitation and temperature, manifested largely by the geochemical proxies, and highlights unique advantages of subalpine lakes in regional paleoclimate reconstructions. Abstract Copyright (2016) Elsevier, B.V. JF - Quaternary Science Reviews AU - Noble, Paula J AU - Ball, G Ian AU - Zimmerman, Susan H AU - Maloney, Jillian AU - Smith, Shane B AU - Kent, Graham AU - Adams, Kenneth D AU - Karlin, Robert E AU - Driscoll, Neal Y1 - 2016/01/01/ PY - 2016 DA - 2016 Jan 01 SP - 193 EP - 210 PB - Elsevier VL - 131 IS - Part A SN - 0277-3791, 0277-3791 KW - United States KW - lithostratigraphy KW - geophysical surveys KW - El Dorado County California KW - isotopes KW - lead KW - paleoclimatology KW - Holocene KW - cores KW - upper Pleistocene KW - Cenozoic KW - California KW - acoustical methods KW - radioactive isotopes KW - dates KW - carbon KW - sediments KW - absolute age KW - tephrochronology KW - acoustical profiles KW - Quaternary KW - chronostratigraphy KW - paleohydrology KW - Central California KW - geophysical methods KW - metals KW - lacustrine environment KW - surveys KW - Pleistocene KW - geophysical profiles KW - C-14 KW - Pb-210 KW - lake sediments KW - Fallen Leaf Lake KW - 24:Quaternary geology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832723437?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Holocene+paleoclimate+history+of+Fallen+Leaf+Lake%2C+CA%2C+from+geochemistry+and+sedimentology+of+well-dated+sediment+cores&rft.au=Noble%2C+Paula+J%3BBall%2C+G+Ian%3BZimmerman%2C+Susan+H%3BMaloney%2C+Jillian%3BSmith%2C+Shane+B%3BKent%2C+Graham%3BAdams%2C+Kenneth+D%3BKarlin%2C+Robert+E%3BDriscoll%2C+Neal&rft.aulast=Noble&rft.aufirst=Paula&rft.date=2016-01-01&rft.volume=131&rft.issue=Part+A&rft.spage=193&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2Fj.quascirev.2015.10.037 L2 - http://www.sciencedirect.com/science/journal/02773791 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 - 65 N1 - Document feature - illus. incl. sect., 2 tables, sketch map N1 - Last updated - 2016-10-27 N1 - SubjectsTermNotLitGenreText - absolute age; acoustical methods; acoustical profiles; C-14; California; carbon; Cenozoic; Central California; chronostratigraphy; cores; dates; El Dorado County California; Fallen Leaf Lake; geophysical methods; geophysical profiles; geophysical surveys; Holocene; isotopes; lacustrine environment; lake sediments; lead; lithostratigraphy; metals; paleoclimatology; paleohydrology; Pb-210; Pleistocene; Quaternary; radioactive isotopes; sediments; surveys; tephrochronology; United States; upper Pleistocene DO - http://dx.doi.org/10.1016/j.quascirev.2015.10.037 ER - TY - JOUR T1 - Plutonium sorption and precipitation on goethite: A question of concentration AN - 1832687433; 782747-86 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Egg, J D B AU - Zhao, P AU - Zavarin, M AU - Tumey, S J AU - Williams, R AU - Dai, Z R AU - Kips, R AU - Kersting, Nd A B AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 186 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832687433?accountid=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=Plutonium+sorption+and+precipitation+on+goethite%3A+A+question+of+concentration&rft.au=Egg%2C+J+D+B%3BZhao%2C+P%3BZavarin%2C+M%3BTumey%2C+S+J%3BWilliams%2C+R%3BDai%2C+Z+R%3BKips%2C+R%3BKersting%2C+Nd+A+B%3BAnonymous&rft.aulast=Egg&rft.aufirst=J+D&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=186&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/186.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 - 182W- 142Nd constraints on the early differentiation of Mars AN - 1832670226; 782762-14 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Kruijer, T S AU - Kleine, T AU - Borg, L E AU - Brennecka, G A AU - Fischer-Goedde, M AU - Irving, A J AU - Bischoff, A AU - Agee, C B AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 1614 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832670226?accountid=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=182W-+142Nd+constraints+on+the+early+differentiation+of+Mars&rft.au=Kruijer%2C+T+S%3BKleine%2C+T%3BBorg%2C+L+E%3BBrennecka%2C+G+A%3BFischer-Goedde%2C+M%3BIrving%2C+A+J%3BBischoff%2C+A%3BAgee%2C+C+B%3BAnonymous&rft.aulast=Kruijer&rft.aufirst=T&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=1614&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/1614.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 - Coupled (super 142) Nd- (super 182) W evidence for early crust formation on Mars AN - 1832659634; 777410-100 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Kruijer, Thomas S AU - Kleine, T AU - Borg, L AU - Brennecka, G A AU - Fischer-Goedde, M AU - Irving, A J AU - Bischoff, A AU - Agee, C B AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no. 2115 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 KW - Northwest Africa Meteorites KW - stony meteorites KW - isotopes KW - Martian meteorites KW - thermal ionization mass spectra KW - mass spectra KW - Mars KW - stable isotopes KW - SNC Meteorites KW - meteorites KW - chronology KW - tungsten KW - NWA 7034 KW - spectra KW - rare earths KW - ALH 84001 KW - magma oceans KW - Hf/W KW - differentiation KW - W-182 KW - achondrites KW - early solar system KW - terrestrial planets KW - ICP mass spectra KW - planets KW - Allan Hills Meteorites KW - shergottite KW - Nd-142 KW - Sm/Nd KW - metals KW - neodymium 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/1832659634?accountid=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=Coupled+%28super+142%29+Nd-+%28super+182%29+W+evidence+for+early+crust+formation+on+Mars&rft.au=Kruijer%2C+Thomas+S%3BKleine%2C+T%3BBorg%2C+L%3BBrennecka%2C+G+A%3BFischer-Goedde%2C+M%3BIrving%2C+A+J%3BBischoff%2C+A%3BAgee%2C+C+B%3BAnonymous&rft.aulast=Kruijer&rft.aufirst=Thomas&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/2115.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 - 12 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - achondrites; ALH 84001; Allan Hills Meteorites; chronology; crust; differentiation; early solar system; Hf/W; ICP mass spectra; isotopes; magma oceans; Mars; Martian meteorites; mass spectra; metals; meteorites; Nd-142; neodymium; Northwest Africa Meteorites; NWA 7034; planets; rare earths; shergottite; Sm/Nd; SNC Meteorites; spectra; stable isotopes; stony meteorites; terrestrial planets; thermal ionization mass spectra; tungsten; W-182 ER - TY - JOUR T1 - The psyche gamma-ray and neutron spectrometer; characterizing the composition of a metal-rich body using nuclear spectroscopy AN - 1832657543; 777378-48 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Lawrence, David J AU - Peplowski, Patrick N AU - Goldsten, John O AU - Burks, Morgan AU - Beck, Andrew W AU - Elkins-Tanton, Linda T AU - Jun, Insoo AU - McCoy, Timothy J AU - Polanskey, Carol A AU - Prettyman, Thomas H AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no 1622 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832657543?accountid=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+psyche+gamma-ray+and+neutron+spectrometer%3B+characterizing+the+composition+of+a+metal-rich+body+using+nuclear+spectroscopy&rft.au=Lawrence%2C+David+J%3BPeplowski%2C+Patrick+N%3BGoldsten%2C+John+O%3BBurks%2C+Morgan%3BBeck%2C+Andrew+W%3BElkins-Tanton%2C+Linda+T%3BJun%2C+Insoo%3BMcCoy%2C+Timothy+J%3BPolanskey%2C+Carol+A%3BPrettyman%2C+Thomas+H%3BAnonymous&rft.aulast=Lawrence&rft.aufirst=David&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. 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N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Gamma-ray spectroscopy of asteroid 16 psyche; expected performance of the psyche gamma-ray spectrometer AN - 1832651448; 777378-47 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Peplowski, Patrick N AU - Lawrence, David J AU - Goldsten, John O AU - Burks, Morgan AU - Beck, Andrew W AU - Elkins-Tanton, Linda T AU - Jun, Insoo AU - McCoy, Timothy J AU - Prettyman, Thomas H AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no 1394 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832651448?accountid=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=Gamma-ray+spectroscopy+of+asteroid+16+psyche%3B+expected+performance+of+the+psyche+gamma-ray+spectrometer&rft.au=Peplowski%2C+Patrick+N%3BLawrence%2C+David+J%3BGoldsten%2C+John+O%3BBurks%2C+Morgan%3BBeck%2C+Andrew+W%3BElkins-Tanton%2C+Linda+T%3BJun%2C+Insoo%3BMcCoy%2C+Timothy+J%3BPrettyman%2C+Thomas+H%3BAnonymous&rft.aulast=Peplowski&rft.aufirst=Patrick&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. 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N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Disruption in gravity-dominated impacts; simulation results and scaling AN - 1832620201; 776758-15 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Movshovitz, N AU - Nimmo, F AU - Korycasnky, D G AU - Asphaug, E AU - Owen, J M AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no1531 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832620201?accountid=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=Disruption+in+gravity-dominated+impacts%3B+simulation+results+and+scaling&rft.au=Movshovitz%2C+N%3BNimmo%2C+F%3BKorycasnky%2C+D+G%3BAsphaug%2C+E%3BOwen%2C+J+M%3BAnonymous&rft.aulast=Movshovitz&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. 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N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Impact simulation benchmarking for the double asteroid redirect test (DART) AN - 1832605596; 777371-67 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Stickle, A M AU - Barnouin, O S AU - Syal, M Bruck AU - Cheng, A AU - El-Mir, C AU - Ernst, C M AU - Michel, P AU - Oklay, N AU - Owen, M AU - Price, M AU - Rainey, E S G AU - Ramesh, K T AU - Schwartz, S R AU - Vincent, J AU - Wuennemann, K AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 EP - Abstract no2832 PB - Lunar and Planetary Science Conference, Houston, TX VL - 47 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832605596?accountid=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+simulation+benchmarking+for+the+double+asteroid+redirect+test+%28DART%29&rft.au=Stickle%2C+A+M%3BBarnouin%2C+O+S%3BSyal%2C+M+Bruck%3BCheng%2C+A%3BEl-Mir%2C+C%3BErnst%2C+C+M%3BMichel%2C+P%3BOklay%2C+N%3BOwen%2C+M%3BPrice%2C+M%3BRainey%2C+E+S+G%3BRamesh%2C+K+T%3BSchwartz%2C+S+R%3BVincent%2C+J%3BWuennemann%2C+K%3BAnonymous&rft.aulast=Stickle&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 - Modeling CH (sub 4) and CO (sub 2) cycling using porewater stable isotopes in a thermokarst bog in Interior Alaska: results from three conceptual reaction networks AN - 1832603150; 772345-5 AB - Quantifying rates of microbial carbon transformation in peatlands is essential for gaining mechanistic understanding of the factors that influence methane emissions from these systems, and for predicting how emissions will respond to climate change and other disturbances. In this study, we used porewater stable isotopes collected from both the edge and center of a thermokarst bog in Interior Alaska to estimate in situ microbial reaction rates. We expected that near the edge of the thaw feature, actively thawing permafrost and greater abundance of sedges would increase carbon, oxygen and nutrient availability, enabling faster microbial rates relative to the center of the thaw feature. We developed three different conceptual reaction networks that explained the temporal change in porewater CO (sub 2) , CH (sub 4) , delta (super 13) C-CO (sub 2) and delta (super 13) C-CH (sub 4) . All three reaction-network models included methane production, methane oxidation and CO (sub 2) production, and two of the models included homoacetogenesis-a reaction not previously included in isotope-based porewater models. All three models fit the data equally well, but rates resulting from the models differed. Most notably, inclusion of homoacetogenesis altered the modeled pathways of methane production when the reaction was directly coupled to methanogenesis, and it decreased gross methane production rates by up to a factor of five when it remained decoupled from methanogenesis. The ability of all three conceptual reaction networks to successfully match the measured data indicate that this technique for estimating in situ reaction rates requires other data and information from the site to confirm the considered set of microbial reactions. Despite these differences, all models indicated that, as expected, rates were greater at the edge than in the center of the thaw bog, that rates at the edge increased more during the growing season than did rates in the center, and that the ratio of acetoclastic to hydrogenotrophic methanogenesis was greater at the edge than in the center. In both locations, modeled rates (excluding methane oxidation) increased with depth. A puzzling outcome from the effort was that none of the models could fit the porewater dataset without generating "fugitive" carbon (i.e., methane or acetate generated by the models but not detected at the field site), indicating that either our conceptualization of the reactions occurring at the site remains incomplete or our site measurements are missing important carbon transformations and/or carbon fluxes. This model-data discrepancy will motivate and inform future research efforts focused on improving our understanding of carbon cycling in permafrost wetlands. Copyright 2015 Springer International Publishing Switzerland JF - Biogeochemistry (Dordrecht) AU - Neumann, Rebecca B AU - Blazewicz, Steven J AU - Conaway, Christopher H AU - Turetsky, Merritt R AU - Waldrop, Mark P Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 57 EP - 87 PB - Springer, Dordrecht - Boston - Lancaster VL - 127 IS - 1 SN - 0168-2563, 0168-2563 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832603150?accountid=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=Biogeochemistry+%28Dordrecht%29&rft.atitle=Modeling+CH+%28sub+4%29+and+CO+%28sub+2%29+cycling+using+porewater+stable+isotopes+in+a+thermokarst+bog+in+Interior+Alaska%3A+results+from+three+conceptual+reaction+networks&rft.au=Neumann%2C+Rebecca+B%3BBlazewicz%2C+Steven+J%3BConaway%2C+Christopher+H%3BTuretsky%2C+Merritt+R%3BWaldrop%2C+Mark+P&rft.aulast=Neumann&rft.aufirst=Rebecca&rft.date=2016-01-01&rft.volume=127&rft.issue=1&rft.spage=57&rft.isbn=&rft.btitle=&rft.title=Biogeochemistry+%28Dordrecht%29&rft.issn=01682563&rft_id=info:doi/10.1007%2Fs10533-015-0168-2 L2 - http://www.springerlink.com/content/100244/ 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 - Responsible Editor: James Sickman. The online version of this article (doi:10.1007/s10533-015-0168-2) contains supplementary material, which is available to authorized users. N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1007/s10533-015-0168-2 ER - TY - JOUR T1 - Demonstration of Protein-Based Human Identification Using the Hair Shaft Proteome. AN - 1818333408; 27603779 AB - Human identification from biological material is largely dependent on the ability to characterize genetic polymorphisms in DNA. Unfortunately, DNA can degrade in the environment, sometimes below the level at which it can be amplified by PCR. Protein however is chemically more robust than DNA and can persist for longer periods. Protein also contains genetic variation in the form of single amino acid polymorphisms. These can be used to infer the status of non-synonymous single nucleotide polymorphism alleles. To demonstrate this, we used mass spectrometry-based shotgun proteomics to characterize hair shaft proteins in 66 European-American subjects. A total of 596 single nucleotide polymorphism alleles were correctly imputed in 32 loci from 22 genes of subjects' DNA and directly validated using Sanger sequencing. Estimates of the probability of resulting individual non-synonymous single nucleotide polymorphism allelic profiles in the European population, using the product rule, resulted in a maximum power of discrimination of 1 in 12,500. Imputed non-synonymous single nucleotide polymorphism profiles from European-American subjects were considerably less frequent in the African population (maximum likelihood ratio = 11,000). The converse was true for hair shafts collected from an additional 10 subjects with African ancestry, where some profiles were more frequent in the African population. Genetically variant peptides were also identified in hair shaft datasets from six archaeological skeletal remains (up to 260 years old). This study demonstrates that quantifiable measures of identity discrimination and biogeographic background can be obtained from detecting genetically variant peptides in hair shaft protein, including hair from bioarchaeological contexts. JF - PloS one AU - Parker, Glendon J AU - Leppert, Tami AU - Anex, Deon S AU - Hilmer, Jonathan K AU - Matsunami, Nori AU - Baird, Lisa AU - Stevens, Jeffery AU - Parsawar, Krishna AU - Durbin-Johnson, Blythe P AU - Rocke, David M AU - Nelson, Chad AU - Fairbanks, Daniel J AU - Wilson, Andrew S AU - Rice, Robert H AU - Woodward, Scott R AU - Bothner, Brian AU - Hart, Bradley R AU - Leppert, Mark AD - Department of Biology, Utah Valley University, Orem, Utah, United States of America. ; Protein-Based Identification Technologies L.L.C., Orem, Utah, United States of America. ; Forensic Science Center, Lawrence Livermore National Laboratory, Livermore, California, United States of America. ; Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana, United States of America. ; Department of Human Genetics, University of Utah, Salt Lake City, Utah, United States of America. ; Mass Spectrometry and Proteomics Core Facility, University of Utah, Salt Lake City, Utah, United States of America. ; Department of Public Health Sciences, University of California, Davis, California, United States of America. ; School of Archaeological Sciences, University of Bradford, Bradford, United Kingdom. ; Department of Environmental Toxicology, University of California, Davis, California, United States of America. ; Sorenson Molecular Genealogical Foundation, Salt Lake City, Utah, United States of America. Y1 - 2016 PY - 2016 DA - 2016 SP - 1 VL - 11 IS - 9 KW - Index Medicus UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1818333408?accountid=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=Demonstration+of+Protein-Based+Human+Identification+Using+the+Hair+Shaft+Proteome.&rft.au=Parker%2C+Glendon+J%3BLeppert%2C+Tami%3BAnex%2C+Deon+S%3BHilmer%2C+Jonathan+K%3BMatsunami%2C+Nori%3BBaird%2C+Lisa%3BStevens%2C+Jeffery%3BParsawar%2C+Krishna%3BDurbin-Johnson%2C+Blythe+P%3BRocke%2C+David+M%3BNelson%2C+Chad%3BFairbanks%2C+Daniel+J%3BWilson%2C+Andrew+S%3BRice%2C+Robert+H%3BWoodward%2C+Scott+R%3BBothner%2C+Brian%3BHart%2C+Bradley+R%3BLeppert%2C+Mark&rft.aulast=Parker&rft.aufirst=Glendon&rft.date=2016-01-01&rft.volume=11&rft.issue=9&rft.spage=e0160653&rft.isbn=&rft.btitle=&rft.title=PloS+one&rft.issn=1932-6203&rft_id=info:doi/10.1371%2Fjournal.pone.0160653 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-09-08 N1 - Date revised - 2017-02-28 N1 - SuppNotes - Cited By: Methods Mol Biol. 2010;673:189-202 [20835799] J Forensic Sci. 2005 Jan;50(1):73-80 [15830999] J Proteomics. 2010 Oct 10;73(11):2092-123 [20816881] J Invest Dermatol. 2005 Mar;124(3):536-44 [15737194] Proc Natl Acad Sci U S A. 2002 Apr 16;99(8):5283-8 [11959979] J Forensic Sci. 2009 Sep;54(5):1198-202 [19737254] PLoS Genet. 2013;9(2):e1003296 [23459685] Nature. 2014 Sep 18;513(7518):409-13 [25230663] Forensic Sci Int. 2005 Oct 29;153(2-3):237-46 [15985352] Science. 2002 Apr 12;296(5566):261-2 [11954565] PeerJ. 2014 Aug 05;2:e506 [25165623] PLoS One. 2012;7(12):e51956 [23251662] Nature. 2013 Jan 10;493(7431):216-20 [23201682] Forensic Sci Int. 2006 Dec 1;164(1):20-32 [16360294] Nature. 2013 Jul 4;499(7456):74-8 [23803765] Methods. 2011 Aug;54(4):424-31 [21277371] Curr Biol. 2010 Feb 23;20(4):R174-83 [20178764] Nature. 2012 Nov 1;491(7422):56-65 [23128226] Naturwissenschaften. 2009 Feb;96(2):267-78 [19043689] Curr Opin Cell Biol. 2002 Feb;14(1):110-22 [11792552] Anal Chem. 2014 Jan 7;86(1):567-75 [24299235] Electrophoresis. 2013 Apr;34(8):1151-62 [23400880] Science. 2012 Jul 6;337(6090):64-9 [22604720] Forensic Sci Rev. 1990 Jun;2(1):25-36 [26266704] Anal Biochem. 2012 Feb 1;421(1):43-55 [22056946] Forensic Sci Int Genet. 2013 Jan;7(1):180-8 [23116723] Nat Genet. 2014 Jul;46(7):748-52 [24880339] Hum Genet. 2014 May;133(5):587-97 [24253421] Rapid Commun Mass Spectrom. 2014 Mar 30;28(6):605-15 [24519823] Annu Rev Genet. 2004;38:645-79 [15568989] Bioinformatics. 2004 Jun 12;20(9):1466-7 [14976030] Mol Cell Proteomics. 2008 Sep;7(9):1748-54 [18515861] Proc R Soc Lond A Math Phys Sci. 1946;186(1007):453-61 [20998741] Differentiation. 2004 Dec;72(9-10):527-40 [15617563] Mol Cell Proteomics. 2005 Sep;4(9):1265-72 [15958392] J Forensic Sci Soc. 1985 Jan-Feb;25(1):57-66 [4009146] Philos Trans R Soc Lond B Biol Sci. 1999 Jan 29;354(1379):77-86; discussion 86-7 [10091249] Clin Chem. 1993 Apr;39(4):561-77 [8472349] J Cosmet Sci. 2011 Mar-Apr;62(2):229-36 [21635850] Ann Anat. 2012 Jan 20;194(1):17-25 [21530205] Proc Biol Sci. 2012 Dec 7;279(1748):4724-33 [23055061] Nat Struct Mol Biol. 2012 Jun 17;19(7):707-15 [22705788] Proc Natl Acad Sci U S A. 2011 May 24;108(21):8611-6 [21555570] Nucleic Acids Res. 2014 Jan;42(Database issue):D7-17 [24259429] Investig Genet. 2010 Dec 01;1(1):14 [21122102] J Proteome Res. 2012 Feb 3;11(2):1009-17 [22103967] Sci Justice. 2002 Jan-Mar;42(1):29-37 [12012647] Mol Cell Proteomics. 2013 Sep;12(9):2383-93 [23720762] Nature. 2010 Sep 2;467(7311):52-8 [20811451] Int J Legal Med. 2010 Mar;124(2):125-31 [19921517] J Forensic Sci. 2005 Sep;50(5):1119-22 [16225218] Forensic Sci Int. 2005 Oct 29;153(2-3):247-59 [15998572] J Proteomics. 2011 Sep 6;74(10):1842-51 [21635977] Curr Opin Biotechnol. 2013 Feb;24(1):31-8 [23142544] J Invest Dermatol. 2005 Mar;124(3):xv-xvii [15737184] Mol Cell Proteomics. 2011 Mar;10(3):M110.000513 [21148632] Forensic Sci Int Genet. 2014 Jan;8(1):187-94 [24315607] Mass Spectrom Rev. 2014 Mar-Apr;33(2):147-56 [24178673] Am J Phys Anthropol. 2012;149 Suppl 55:24-39 [23124308] Proc Natl Acad Sci U S A. 1999 Jul 20;96(15):8426-31 [10411891] Science. 2011 Oct 7;334(6052):94-8 [21940856] Forensic Sci Int. 2002 Aug 28;128(3):108-14 [12175788] BMJ. 1994 Jul 9;309(6947):102 [8038641] Nature. 1993 Apr 22;362(6422):709-15 [8469282] Mol Cell Proteomics. 2006 May;5(5):789-800 [16446289] J Proteome Res. 2014 Jan 3;13(1):228-40 [24175627] Nat Genet. 2011 Mar;43(3):269-76 [21317889] Nature. 2001 May 10;411(6834):199-204 [11346797] J Proteome Res. 2007 Jun;6(6):2331-40 [17488105] Nature. 2010 Oct 28;467(7319):1061-73 [20981092] Toxicol Ind Health. 1999 Oct;15(6):532-51 [10560132] J Forensic Sci. 2002 Sep;47(5):964-7 [12353582] Br J Dermatol. 2007 Sep;157(3):450-7 [17553052] Nature. 2013 Nov 7;503(7474):18-9 [24201261] Am J Hum Genet. 2016 Apr 7;98 (4):728-34 [27058445] Proc Natl Acad Sci U S A. 2010 Jan 12;107(2):786-91 [20080753] Nature. 2010 Feb 11;463(7282):757-62 [20148029] Curr Opin Biotechnol. 2011 Feb;22(1):3-8 [20888217] Conflict of Interest: Patent based on the concept and some data presented in this study have been awarded (US 8,877,455 B2, Australian Patent 2011229918, Canadian Patent CA 2794248, and European Patent EP11759843.3, GJP inventor). The patent is owned by Parker Proteomics LLC. Protein-Based Identification Technologies LLC has an exclusive license to develop the intellectual property and is co-owned by Utah Valley University and GJP. This ownership of PBIT and associated intellectual property does not alter our adherence to PLOS ONE policies on sharing data and materials. N1 - Last updated - 2017-02-28 DO - http://dx.doi.org/10.1371/journal.pone.0160653 ER - TY - JOUR T1 - Controls on sediment flux through the Indus submarine canyon during the last glacial cycle AN - 1815665218; 2016-076402 AB - Transport of sediment through canyons on continental margins is one of the primary processes responsible for building submarine fans in many deep-sea basins. These fans are not only of economic interest as hydrocarbon reservoirs but also are potentially high-resolution archives of changing environmental conditions in the onshore drainage basins. Earlier models for sediment transport through canyons indicated a dominant role for sea level in controlling this flux, but this largely ignored the role of climatically modulated sediment delivery. We focus on evaluating the roles played by sea level variations and sediment supply in feeding sediment through the submarine canyon to the deep-sea basin and to assess the continuity of sandy channel fills. Classic sequence stratigraphic models argue that submarine canyons and their associated deep-sea fans should become inactive during periods of rising and high sealevel as accommodation space is generated on the continental shelf. New cores from the canyon now show that sediment has been propagating deep through the shelf canyon during the entire Holocene. Sediment accumulation is known to be very rapid in recent times at the head of the canyon, but new (super 14) C ages from foraminifera show that sandy sedimentation was ongoing in much deeper water in what is now an ox-bow cut-off at approximately 7 ka. A core in the mid shelf canyon shows that sedimentation there has been rapid since at least 1000 yrs ago, and may have involved significant recycling, possibly from the depocenter at the canyon head. Nd and Sr isotopes allow us to see that sediment in the canyon is of the same composition as that in the river mouth at the time of sedimentation. This raises the possibility that the river was directly supplying sediment to the canyon since at least 5 ka, shortly after eustatic sealevel stopped rising. Our data indicate that despite sealevel rise sediment supply to the canyon was not cut-off during the deglaciation, although the volume of the flux was reduced. We suggest that enhanced sediment supply, driven by strong monsoon rains onshore compensated for the rising sealevel and allowed the connection between river and canyon to be maintained. JF - Abstracts with Programs - Geological Society of America AU - Li, Yuting AU - Clift, Peter D AU - Boning, Philipp AU - Giosan, Liviu AU - Guilderson, Tom AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 12 EP - 3 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 1 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815665218?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Controls+on+sediment+flux+through+the+Indus+submarine+canyon+during+the+last+glacial+cycle&rft.au=Li%2C+Yuting%3BClift%2C+Peter+D%3BBoning%2C+Philipp%3BGiosan%2C+Liviu%3BGuilderson%2C+Tom%3BAnonymous&rft.aulast=Li&rft.aufirst=Yuting&rft.date=2016-01-01&rft.volume=48&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/10.1130%2Fabs%2F2016SC-271517 LA - English DB - GeoRef N1 - Conference title - Geological Society of America, South-Central Section, 50th annual meeting 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 - 2016-09-01 N1 - CODEN - GAAPBC DO - http://dx.doi.org/10.1130/abs/2016SC-271517 ER - TY - JOUR T1 - Complex moraine exposure ages on Holocene moraines in the Sierra Nevada; a Neoglacial conundrum AN - 1812218823; 2016-070668 AB - In an effort to test the temporal and spatial variability of Holocene glaciation in the Sierra Nevada, CA, we have collected samples for (super 10) Be CRN exposure dating from moraines and rock glaciers below six different cirques between Lake Tahoe and Big Pine. Our preliminary results present a conundrum: although all deposits are geomorphically young (fresh unweathered boulders, unstable and unvegetated slopes) and were previously mapped as Matthes age (Little Ice Age (LIA) equivalent), only some moraines show dominantly young ages consistent with the mapping and other previous studies of Neoglaciation in the range. In contrast, some of the moraines show a majority of ages thousands of years older than LIA. For example, nearly all (super 10) Be ages on Matthes moraines below the Lyell Glacier (Yosemite NP) lie between 150-300 yr before 2015, whereas similar moraines below the adjacent Maclure Glacier have exposure ages ranging from 1900-3900 yr old. Boulders on correlative Matthes moraines to the north below Price Peak (west Lake Tahoe) have exposure ages ranging from 1900-9900 yr old, with no ages within the LIA window. The abundance of preLIA exposure ages on many of these moraines seemingly contradicts both historical photographic evidence as well as geomorphic and lake sediment evidence, which indicate that the most extensive Holocene glaciation in the Sierra Nevada was during the late LIA. Although inheritance in moraines of such small glaciers likely explains some of the discrepancy, internal consistency of ages at some sites belies that as the sole reason. Some ages, such as those below the Maclure Glacier, may reflect slow flow dynamics associated with debris covered glaciers (rock glaciers). The older ages below Price Peak, however, are more difficult to reconcile with previous studies, particularly those indicating absence of glaciers in the Sierra before approximately 3500 cal yr BP. Other possible explanations include deposition related to protalus processes or to discrete events (e.g., earthquake induced rockfall); conversely, the ages may indicate that Holocene glaciation in the range was more spatially and temporally heterogeneous than previously thought. CRN analyses of the remainder of the samples, as well as planned lake-sediment coring below select sites, may help resolve this conundrum. JF - Abstracts with Programs - Geological Society of America AU - Clark, Douglas H AU - Hidy, Alan J AU - Zimmerman, Susan H AU - Finkel, Robert C AU - Stock, Greg M AU - Schaefer, Joerg M AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 3 EP - 2 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 4 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812218823?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Complex+moraine+exposure+ages+on+Holocene+moraines+in+the+Sierra+Nevada%3B+a+Neoglacial+conundrum&rft.au=Clark%2C+Douglas+H%3BHidy%2C+Alan+J%3BZimmerman%2C+Susan+H%3BFinkel%2C+Robert+C%3BStock%2C+Greg+M%3BSchaefer%2C+Joerg+M%3BAnonymous&rft.aulast=Clark&rft.aufirst=Douglas&rft.date=2016-01-01&rft.volume=48&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/10.1130%2Fabs%2F2016CD-274799 LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Cordilleran Section, 112th annual meeting 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 - 2016-08-18 N1 - CODEN - GAAPBC DO - http://dx.doi.org/10.1130/abs/2016CD-274799 ER - TY - JOUR T1 - An Explosion Aftershock Model with Application to On-Site Inspection AN - 1808378650; PQ0002587135 AB - An estimate of aftershock activity due to a theoretical underground nuclear explosion is produced using an aftershock rate model. The model is developed with data from the Nevada National Security Site, formerly known as the Nevada Test Site, and the Semipalatinsk Test Site, which we take to represent soft-rock and hard-rock testing environments, respectively. Estimates of expected magnitude and number of aftershocks are calculated using the models for different testing and inspection scenarios. These estimates can help inform the Seismic Aftershock Monitoring System (SAMS) deployment in a potential Comprehensive Test Ban Treaty On-Site Inspection (OSI), by giving the OSI team a probabilistic assessment of potential aftershocks in the Inspection Area (IA). The aftershock assessment, combined with an estimate of the background seismicity in the IA and an empirically derived map of threshold magnitude for the SAMS network, could aid the OSI team in reporting. We apply the hard-rock model to a M5 event and combine it with the very sensitive detection threshold for OSI sensors to show that tens of events per day are expected up to a month after an explosion measured several kilometers away. JF - Pure and Applied Geophysics AU - Ford, Sean R AU - Labak, Peter AD - Lawrence Livermore National Laboratory, Livermore, USA, sean@llnl.gov Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 173 EP - 181 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 173 IS - 1 SN - 0033-4553, 0033-4553 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Sensors KW - USA, Nevada KW - Explosions KW - Treaties KW - Nuclear explosions KW - Nuclear Explosions KW - Geophysics KW - Inspection KW - Monitoring KW - Monitoring systems KW - Modelling KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808378650?accountid=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=Pure+and+Applied+Geophysics&rft.atitle=An+Explosion+Aftershock+Model+with+Application+to+On-Site+Inspection&rft.au=Ford%2C+Sean+R%3BLabak%2C+Peter&rft.aulast=Ford&rft.aufirst=Sean&rft.date=2016-01-01&rft.volume=173&rft.issue=1&rft.spage=173&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-015-1041-x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Sensors; Nuclear explosions; Geophysics; Monitoring systems; Explosions; Modelling; Nuclear Explosions; Monitoring; Inspection; Treaties; USA, Nevada DO - http://dx.doi.org/10.1007/s00024-015-1041-x ER - TY - JOUR T1 - Reconstructing the glacial history of the Hunafloi Bay region in northwest Iceland using cosmogenic (super 36) Cl surface exposure dating AN - 1807508925; 2016-067453 AB - Current knowledge of ice sheet geometry and extent in Iceland during the Last Glacial Maximum (LGM) and subsequent deglaciation is based on a combination of marine-based records, terrestrial evidence, and glaciological model simulations. Ongoing studies, including recently published (super 36) Cl exposure ages of bedrock surfaces and moraines in the West Fjords (Vestfirdir), have continued to expand on available glacial records, but critical details regarding the timing and nature of deglaciation remain unresolved. One long-standing question concerns whether a restricted ice cap on the Vestfirdir peninsula existed independently from the main Iceland ice sheet during the LGM, or if the two ice sectors coalesced into one large ice complex. In this study, we are developing a suite of (super 36) Cl surface exposure ages on glacially scoured bedrock from Vestfirdir and around Hunafloi Bay to further define the pattern and chronology of ice sheet margin retreat in northwest Iceland during the last deglaciation. Sample sites are distributed specifically in the region where the two ice sectors may or may not have been merged during the LGM, and hence provide an opportunity to directly evaluate hypothesized ice sheet configurations. Dated ice margin positions from this study will be combined with ice sheet surface profiles derived from previously dated tuyas in the Northern Volcanic Zone, in order to place empirical constraints on ice sheet geometry across northern Iceland during the last deglaciation. Additionally, the new (super 36) Cl ages will be considered within the context of properties of streamlined landforms in the valleys of Vididalur, Vatnsdalur, and Svinadalur, south of Hunafloi Bay, which support the presence of paleo-ice stream activity in northern Iceland. The improved terrestrial chronology of glacial thinning, retreat, and ice stream activity in this region will inform future glaciological modeling studies in Iceland. JF - Abstracts with Programs - Geological Society of America AU - Houts, Amanda N AU - Licciardi, Joseph M AU - Principato, Sarah M AU - Zimmerman, Susan H AU - Finkel, Robert C AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 9 EP - 3 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 2 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508925?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reconstructing+the+glacial+history+of+the+Hunafloi+Bay+region+in+northwest+Iceland+using+cosmogenic+%28super+36%29+Cl+surface+exposure+dating&rft.au=Houts%2C+Amanda+N%3BLicciardi%2C+Joseph+M%3BPrincipato%2C+Sarah+M%3BZimmerman%2C+Susan+H%3BFinkel%2C+Robert+C%3BAnonymous&rft.aulast=Houts&rft.aufirst=Amanda&rft.date=2016-01-01&rft.volume=48&rft.issue=2&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/10.1130%2Fabs%2F2016NE-272423 LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 51st annual meeting 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 - 2016-07-29 N1 - CODEN - GAAPBC DO - http://dx.doi.org/10.1130/abs/2016NE-272423 ER - TY - JOUR T1 - Late glacial and early Holocene glacier fluctuations in the Rwenzori Mountains, Uganda-Democratic Republic of Congo AN - 1807507781; 2016-067396 AB - The tropics are the locus of global atmospheric convergence and water vapor production, and as such have the potential to amplify - or trigger - global climate changes. However, the role of the tropics in the climate system is unclear. Both the magnitude and timing of warming in the tropics since the Last Glacial Maximum (LGM; approximately 26-19.5 ka) is uncertain, as is the question of whether temperatures across the tropics fluctuated synchronously following the LGM. Here we present a chronology of glaciation from the Rwenzori Mountains, Uganda-Democratic Republic of Congo, and compare these data to similar chronologies from elsewhere in the tropics. Using cosmogenic (super 10) Be to date glacial deposits, we determined the timing and magnitude of ice fluctuations following the LGM. This chronology indicates that ice was more extensive prior to the Younger Dryas (YD; approximately 12.9-11.6 ka). No YD-age moraines are identified, but ice in the Rwenzori was inboard of its pre-YD extent throughout YD time. Rapid recession occurred between approximately 11.5 and approximately 10.0 ka during the early Holocene ( approximately 11.6-8.0 ka). When compared with similar datasets from tropical South America, there is a broad synchrony in both the timing and magnitude of ice recession across the tropics during the later stages of deglaciation and the early Holocene. This suggests that glaciers in both tropical Africa and South America responded to a common driver during this time. Because the hydrologic histories of tropical South America and Africa are distinct since the LGM, we suggest that temperature was the primary driver of glacier fluctuations in both regions. JF - Abstracts with Programs - Geological Society of America AU - Jackson, Margaret S AU - Kelly, Meredith A AU - Russell, James M AU - Doughty, Alice M AU - Howley, Jennifer A AU - Baber, Margaret B AU - Zimmerman, Susan H AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 3 EP - 8 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 2 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807507781?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Late+glacial+and+early+Holocene+glacier+fluctuations+in+the+Rwenzori+Mountains%2C+Uganda-Democratic+Republic+of+Congo&rft.au=Jackson%2C+Margaret+S%3BKelly%2C+Meredith+A%3BRussell%2C+James+M%3BDoughty%2C+Alice+M%3BHowley%2C+Jennifer+A%3BBaber%2C+Margaret+B%3BZimmerman%2C+Susan+H%3BAnonymous&rft.aulast=Jackson&rft.aufirst=Margaret&rft.date=2016-01-01&rft.volume=48&rft.issue=2&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/10.1130%2Fabs%2F2016NE-271830 LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 51st annual meeting 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 - 2016-07-29 N1 - CODEN - GAAPBC DO - http://dx.doi.org/10.1130/abs/2016NE-271830 ER - TY - JOUR T1 - Changes in magma storage conditions following caldera collapse at Okataina volcanic center, New Zealand AN - 1797541496; 2016-051120 AB - Large silicic volcanic centers produce both small rhyolitic eruptions and catastrophic caldera-forming eruptions. Although changes in trace element and isotopic compositions within eruptions following caldera collapse have been observed at rhyolitic volcanic centers such as Yellowstone and Long Valley, much still remains unknown about the ways in which magma reservoirs are affected by caldera collapse. We present (super 238) U- (super 230) Th age, trace element, and Hf isotopic data from individual zircon crystals from four eruptions from the Okataina Volcanic Center, Taupo Volcanic Zone, New Zealand, in order to assess changes in trace element and isotopic composition of the reservoir following the 45-ka caldera-forming Rotoiti eruption. Our data indicate that (1) mixing of magmas derived from crustal melts and mantle melts takes place within the shallow reservoir; (2) while the basic processes of melt generation likely did not change significantly between pre- and post-caldera rhyolites, post-caldera zircons show increased trace element and isotopic heterogeneity that suggests a decrease in the degree of interconnectedness of the liquid within the reservoir following collapse; and (3) post-caldera eruptions from different vents indicate different storage times of the amalgamated melt prior to eruption. These data further suggest that the timescales needed to generate large volumes of eruptible melt may depend on the timescales needed to increase interconnectedness and achieve widespread homogenization throughout the reservoir. Copyright 2015 Springer-Verlag Berlin Heidelberg JF - Contributions to Mineralogy and Petrology AU - Rubin, Allison AU - Cooper, Kari M AU - Leever, Marissa AU - Wimpenny, Josh AU - Deering, Chad AU - Rooney, Tyrone AU - Gravley, Darren AU - Yin, Qingzhu Y1 - 2016/01// PY - 2016 DA - January 2016 EP - unpaginated PB - Springer International, Heidelberg - New York VL - 171 IS - 1 SN - 0010-7999, 0010-7999 KW - silicates KW - volcanic rocks KW - ion probe data KW - collapse structures KW - isotopes KW - igneous rocks KW - Haroharo Caldera KW - mass spectra KW - Okataina volcanic centre KW - Th/U KW - North Island KW - upper Pleistocene KW - Cenozoic KW - volcanic features KW - hafnium KW - dates KW - orthosilicates KW - absolute age KW - spectra KW - rare earths KW - trace elements KW - zircon group KW - rhyolites KW - Quaternary KW - Australasia KW - zircon KW - Taupo volcanic zone KW - volcanic centers KW - nesosilicates KW - ICP mass spectra KW - calderas KW - SHRIMP data KW - metals KW - magmas KW - eruptions KW - Rotoiti KW - volcanoes KW - Pleistocene KW - New Zealand KW - magma chambers 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/1797541496?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Contributions+to+Mineralogy+and+Petrology&rft.atitle=Changes+in+magma+storage+conditions+following+caldera+collapse+at+Okataina+volcanic+center%2C+New+Zealand&rft.au=Rubin%2C+Allison%3BCooper%2C+Kari+M%3BLeever%2C+Marissa%3BWimpenny%2C+Josh%3BDeering%2C+Chad%3BRooney%2C+Tyrone%3BGravley%2C+Darren%3BYin%2C+Qingzhu&rft.aulast=Rubin&rft.aufirst=Allison&rft.date=2016-01-01&rft.volume=171&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Contributions+to+Mineralogy+and+Petrology&rft.issn=00107999&rft_id=info:doi/10.1007%2Fs00410-015-1216-6 L2 - http://www.springerlink.com/(zmx2wiu4y01pcgigj5i3jxf5)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100406,1 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 - 65 N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2016-06-17 N1 - CODEN - CMPEAP N1 - SubjectsTermNotLitGenreText - absolute age; Australasia; calderas; Cenozoic; collapse structures; dates; eruptions; hafnium; Haroharo Caldera; ICP mass spectra; igneous rocks; ion probe data; isotopes; magma chambers; magmas; mass spectra; metals; nesosilicates; New Zealand; North Island; Okataina volcanic centre; orthosilicates; Pleistocene; Quaternary; rare earths; rhyolites; Rotoiti; SHRIMP data; silicates; spectra; Taupo volcanic zone; Th/U; trace elements; upper Pleistocene; volcanic centers; volcanic features; volcanic rocks; volcanoes; zircon; zircon group DO - http://dx.doi.org/10.1007/s00410-015-1216-6 ER - TY - JOUR T1 - Precipitation pathways for ferrihydrite formation in acidic solutions AN - 1793204608; 2016-046293 AB - Iron oxides and oxyhydroxides form via Fe (super 3+) hydrolysis and polymerization in many aqueous environments, but the pathway from Fe (super 3+) monomers to oligomers and then to solid phase nuclei is unknown. In this work, using combined X-ray, UV-vis, and Moessbauer spectroscopic approaches, we were able to identify and quantify the long-time sought ferric speciation over time during ferric oxyhydroxide formation in partially-neutralized ferric nitrate solutions ([Fe (super 3+) ] = 0.2 M, 1.8 < pH < 3). Results demonstrate that Fe exists mainly as Fe(H (sub 2) O) (sub 6) (super 3+) , mu -oxo aquo dimers and ferrihydrite, and that with time, the mu -oxo dimer decreases while the other two species increase in their concentrations. No larger Fe oligomers were detected. Given that the structure of the mu -oxo dimer is incompatible with those of all Fe oxides and oxyhydroxides, our results suggest that reconfiguration of the mu -oxo dimer structure occurs prior to further condensation leading up to the nucleation of ferrihydrite. The structural reconfiguration is likely the rate-limiting step involved in the nucleation process. Abstract Copyright (2016) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Zhu, Mengqiang AU - Frandsen, Cathrine AU - Wallace, Adam F AU - Legg, Benjamin AU - Khalid, Syed AU - Zhang, Hengzhong AU - Morup, Steen AU - Banfield, Jillian F AU - Waychunas, Glenn A Y1 - 2016/01/01/ PY - 2016 DA - 2016 Jan 01 SP - 247 EP - 264 PB - Elsevier, New York, NY VL - 172 SN - 0016-7037, 0016-7037 KW - iron oxides KW - X-ray diffraction data KW - hydrolysis KW - crystal structure KW - polymerization KW - aqueous solutions KW - iron KW - water-rock interaction KW - ultraviolet spectra KW - oxides KW - acidic composition KW - spectra KW - water pollution KW - pH KW - Mossbauer spectra KW - experimental studies KW - pollutants KW - solutes KW - pollution KW - ferrihydrite KW - iron hydroxides KW - hydroxides KW - nucleation KW - precipitation KW - metals KW - EXAFS data KW - crystal chemistry KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793204608?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Precipitation+pathways+for+ferrihydrite+formation+in+acidic+solutions&rft.au=Zhu%2C+Mengqiang%3BFrandsen%2C+Cathrine%3BWallace%2C+Adam+F%3BLegg%2C+Benjamin%3BKhalid%2C+Syed%3BZhang%2C+Hengzhong%3BMorup%2C+Steen%3BBanfield%2C+Jillian+F%3BWaychunas%2C+Glenn+A&rft.aulast=Zhu&rft.aufirst=Mengqiang&rft.date=2016-01-01&rft.volume=172&rft.issue=&rft.spage=247&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2015.09.015 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. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-06-02 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - acidic composition; aqueous solutions; crystal chemistry; crystal structure; EXAFS data; experimental studies; ferrihydrite; hydrolysis; hydroxides; iron; iron hydroxides; iron oxides; metals; Mossbauer spectra; nucleation; oxides; pH; pollutants; pollution; polymerization; precipitation; solutes; spectra; ultraviolet spectra; water pollution; water-rock interaction; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.gca.2015.09.015 ER - TY - JOUR T1 - Late Quaternary slip-rate along the central Bangong-Chaxikang segment of the Karakorum Fault, western Tibet AN - 1756508371; 2016-007685 AB - Insight into the spatial and temporal changes of slip-rate is essential to understand the kinematic role of large strike-slip faults in continental collision zones. Geodetic and geologic rates from present to several million years ago along the Karakorum fault range from 0 to 11 mm/yr. Here, we determine the first late Quaternary slip-rate at the southern end of the linear Bangong-Chaxikang segment of the Karakorum fault, using cumulative offsets (20-200 m) of fans and terraces at three sites, as well as 74 new 10Be surface-exposure ages to constrain the age of these offset geomorphic markers. The rate is >3 mm/yr at sites Gun and Chaxikang, and it is >1.7-2.2 mm/yr at the Gar fan site. Together with rates obtained along the southernmost Menshi-Kailas segment, the Karakorum fault slip-rate seems to increase southeastward from south of Bangong Lake to Kailas (from >3 to >8 mm/yr). These Karakorum fault slip-rate data (>3-8 mm/yr), together with the total length of the fault (>1000 km) and its initiation age (>13-23 Ma), confirm that the Karakorum fault is the major fault accommodating dextral strike-slip motion NE of the western Himalayas. The dextral Karakorum fault in the south and the conjugate left-lateral Longmu Co-Altyn Tagh fault system in the north are thus the major strike-slip faults of western Tibet, which contribute to eastward extrusion of Tibet. JF - Geological Society of America Bulletin AU - Chevalier, Marie-Luce AU - van der Woerd, Jerome AU - Tapponnier, Paul AU - Li, Haibing AU - Ryerson, Frederick J AU - Finkel, Robert C Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 284 EP - 314 PB - Geological Society of America (GSA), Boulder, CO VL - 128 IS - 1-2 SN - 0016-7606, 0016-7606 KW - Far East KW - western Xizang China KW - isotopes KW - slip rates KW - strike-slip faults KW - displacements KW - exposure age KW - Cenozoic KW - radioactive isotopes KW - dates KW - Xizang China KW - absolute age KW - tectonics KW - Asia KW - faults KW - China KW - alkaline earth metals KW - Quaternary KW - Be-10 KW - Karakoram Fault KW - kinematics KW - metals KW - upper Quaternary KW - beryllium KW - 03:Geochronology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756508371?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geological+Society+of+America+Bulletin&rft.atitle=Late+Quaternary+slip-rate+along+the+central+Bangong-Chaxikang+segment+of+the+Karakorum+Fault%2C+western+Tibet&rft.au=Chevalier%2C+Marie-Luce%3Bvan+der+Woerd%2C+Jerome%3BTapponnier%2C+Paul%3BLi%2C+Haibing%3BRyerson%2C+Frederick+J%3BFinkel%2C+Robert+C&rft.aulast=Chevalier&rft.aufirst=Marie-Luce&rft.date=2016-01-01&rft.volume=128&rft.issue=1-2&rft.spage=284&rft.isbn=&rft.btitle=&rft.title=Geological+Society+of+America+Bulletin&rft.issn=00167606&rft_id=info:doi/10.1130%2FB31269.1 L2 - http://gsabulletin.gsapubs.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 137 N1 - PubXState - CO N1 - Document feature - illus. incl. 3 tables, geol. sketch maps N1 - Last updated - 2016-05-19 N1 - CODEN - BUGMAF N1 - SubjectsTermNotLitGenreText - absolute age; alkaline earth metals; Asia; Be-10; beryllium; Cenozoic; China; dates; displacements; exposure age; Far East; faults; isotopes; Karakoram Fault; kinematics; metals; Quaternary; radioactive isotopes; slip rates; strike-slip faults; tectonics; upper Quaternary; western Xizang China; Xizang China DO - http://dx.doi.org/10.1130/B31269.1 ER - TY - JOUR T1 - Paclitaxel Enhances Carboplatin-DNA Adduct Formation and Cytotoxicity. AN - 1751194281; 26544157 AB - This rapid report focuses on the pharmacodynamic mechanism of the carboplatin/paclitaxel combination and correlates it with its cytotoxicity. Consistent with the synergistic to additive antitumor activity (the combination index ranging from 0.53 to 0.94), cells exposed to this combination had significantly increased carboplatin-DNA adduct formation when compared to that of carboplatin alone (450 ± 30 versus 320 ± 120 adducts per 10(8) nucleotides at 2 h, p = 0.004). Removal of paclitaxel increased the repair of carboplatin-DNA adducts: 39.4 versus 33.1 adducts per 10(8) nucleotides per hour in carboplatin alone (p = 0.021). This rapid report provides the first pharmacodynamics data to support the use of carboplatin/paclitaxel combination in the clinic. JF - Chemical research in toxicology AU - Jiang, Shuai AU - Pan, Amy W AU - Lin, Tzu-yin AU - Zhang, Hongyong AU - Malfatti, Michael AU - Turteltaub, Kenneth AU - Henderson, Paul T AU - Pan, Chong-xian AD - Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis , 4501 X Street, Room 3016, Sacramento, California 95817, United States. ; Lawrence Livermore National Laboratory , P.O. Box 808, Livermore, California 94551-0808, United States. Y1 - 2015/12/21/ PY - 2015 DA - 2015 Dec 21 SP - 2250 EP - 2252 VL - 28 IS - 12 KW - DNA Adducts KW - 0 KW - carboplatin-DNA adduct KW - Carboplatin KW - BG3F62OND5 KW - Paclitaxel KW - P88XT4IS4D KW - Index Medicus KW - Cell Survival -- drug effects KW - Humans KW - Urinary Bladder Neoplasms -- drug therapy KW - Cell Line, Tumor KW - Antineoplastic Combined Chemotherapy Protocols -- pharmacology KW - Drug Synergism KW - Antineoplastic Combined Chemotherapy Protocols -- therapeutic use KW - Antineoplastic Combined Chemotherapy Protocols -- toxicity KW - DNA Adducts -- toxicity KW - Carboplatin -- toxicity KW - Carboplatin -- metabolism KW - Paclitaxel -- therapeutic use KW - Paclitaxel -- pharmacology KW - Carboplatin -- therapeutic use KW - DNA Adducts -- therapeutic use KW - DNA Adducts -- metabolism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1751194281?accountid=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+research+in+toxicology&rft.atitle=Paclitaxel+Enhances+Carboplatin-DNA+Adduct+Formation+and+Cytotoxicity.&rft.au=Jiang%2C+Shuai%3BPan%2C+Amy+W%3BLin%2C+Tzu-yin%3BZhang%2C+Hongyong%3BMalfatti%2C+Michael%3BTurteltaub%2C+Kenneth%3BHenderson%2C+Paul+T%3BPan%2C+Chong-xian&rft.aulast=Jiang&rft.aufirst=Shuai&rft.date=2015-12-21&rft.volume=28&rft.issue=12&rft.spage=2250&rft.isbn=&rft.btitle=&rft.title=Chemical+research+in+toxicology&rft.issn=1520-5010&rft_id=info:doi/10.1021%2Facs.chemrestox.5b00422 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-08-08 N1 - Date created - 2015-12-21 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Cancer Chemother Pharmacol. 2001;47(1):22-6 [11221957] Gynecol Oncol. 2013 Feb;128(2):377-82 [23168176] Breast Cancer Res Treat. 2001 Jun;67(3):223-33 [11561768] Cancer Chemother Pharmacol. 2001 Sep;48(3):229-34 [11592345] Anal Chem. 2003 May 1;75(9):2192-6 [12720362] Nat Rev Cancer. 2004 Apr;4(4):253-65 [15057285] Jpn J Clin Oncol. 2004 Sep;34(9):499-504 [15466821] Cancer Chemother Pharmacol. 1983;11(1):5-7 [6349844] Drug Metab Dispos. 1995 Apr;23(4):506-12 [7600920] Cancer Chemother Pharmacol. 1996;37(4):382-4 [8548886] Toxicol Lett. 1998 Dec 28;102-103:435-9 [10022292] Anticancer Drugs. 2005 Apr;16(4):417-22 [15746578] Pharmacol Rev. 2006 Sep;58(3):621-81 [16968952] Nat Rev Mol Cell Biol. 2008 Apr;9(4):297-308 [18285803] Cancer Res. 2010 Jan 15;70(2):440-6 [20068163] Bioanalysis. 2010 Mar;2(3):373-6 [21083245] Cancer Lett. 2001 Apr 26;165(2):147-53 [11275363] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acs.chemrestox.5b00422 ER - TY - JOUR T1 - Virtual seismometers for induced seismicity monitoring AN - 1849310857; 2016-109397 AB - Induced seismicity is associated with subsurface fluid injection, and puts at risk efforts to develop geologic carbon sequestration and enhanced geothermal systems. We are developing methods to monitor the microseismically active zone so that we can identify faults at risk of slipping. We are using the Virtual Seismometer Method (VSM), which is an interferometric technique that is very sensitive to the source parameters (location, mechanism and magnitude) and to the earth structure in the source region. Given an ideal geometry, that is, when two quakes are roughly in line with a recording station, the correlation of their waveforms provide a precise estimate of the Green's function between them, modified by their source mechanisms. When measuring microseismicity, this geometry is rarely ideal and we need to account for variations in the geometry as well. VSM enables us to virtually place seismometers inside a micro events cloud, where we can focus on properties directly between induced micro events, and doing so, monitor the evolution of the seismicity and precisely image potential fault zones. Here, we show that the cross-correlated signals recorded at the surface are a combination of the strain field between two sources times a moment tensor. Based on this relationship, we demonstrate how we can use this measured cross-correlated signal to invert for focal mechanism. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Morency, Christina AU - Matzel, Eric AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51M EP - 1565 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310857?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Virtual+seismometers+for+induced+seismicity+monitoring&rft.au=Morency%2C+Christina%3BMatzel%2C+Eric%3BAnonymous&rft.aulast=Morency&rft.aufirst=Christina&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 - Development of heterogeneity in proppant distribution due to engineered and natural processes during hydraulic fracturing AN - 1849310557; 2016-109491 AB - Proppant, such as sand, is injected during hydraulic fracturing to maintain fracture aperture and conductivity. Proppant performance is a complex result of fluid flow, discrete particle mechanics and geomechanical deformation. We present investigations into these phenomena at scales ranging from millimeters to meters. Traditionally, the design goal for proppant placement is uniform distribution by using viscous carrier fluids that keep the proppant suspended and maintain conductivity over the full area of the fracture. Large volume hydraulic fracturing in shales typically use low viscosity fluids, resulting in proppant settling out from the carrier fluid. Consequently, the proppant occupies the lower portion of the fracture. In addition, many shale plays host natural fractures that take up injected carrier fluid, but may not develop sufficient aperture to accommodate proppant. We present simulations investigating natural development of heterogeneity in proppant distribution within fracture networks due to settling and network flow. In addition to natural development of heterogeneity, the petroleum industry has sought to engineer heterogeneity to generate isolated propped portions of the fracture that maintain aperture in adjacent, open channels. We present two examples of such heterogeneous proppant placement (HPP) technologies. The first involves pulsating proppant at the wellhead and the second utilizes a homogenous composite fluid that develops heterogeneity spontaneously through hydrodynamic instabilities. We present simulation results that compare these approaches and conclude that spontaneous creation of heterogeneity has distinct geomechanical advantages. Finally, we present simulations at the scale of individual proppant particles that emphasize the complexity of dynamic instabilities and their influence upon proppant fate. Disclaimer: This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Morris, Joseph AU - Roy, Pratanu AU - Walsh, Stuart AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H54F EP - 04 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310557?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Development+of+heterogeneity+in+proppant+distribution+due+to+engineered+and+natural+processes+during+hydraulic+fracturing&rft.au=Morris%2C+Joseph%3BRoy%2C+Pratanu%3BWalsh%2C+Stuart%3BAnonymous&rft.aulast=Morris&rft.aufirst=Joseph&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 - Seismic imaging of open subsurface fractures AN - 1849310523; 2016-109394 AB - Injection of high-pressure fluid into the subsurface is proven to stimulate geothermal, oil, and gas production by opening cracks that increase permeability. The effectiveness of increasing permeability by high-pressure injection has been revolutionized by the introduction of "proppants" into the injected fluid to keep cracks open after the pressure of the stimulation activity ends. The network of fractures produced during stimulation is most commonly inferred by the location of micro-earthquakes. However, existing (closed) fractures may open aseismically, so the whole fracture network may not be imaged by micro-seismic locations alone. Further, whether all new fractures remain open and for how long remains unclear. Open cracks, even fluid-filled cracks, scatter seismic waves because traction forces are not transmitted across the gap. Numerical simulation confirms that an open crack with dimensions on the order of 10 meters can scatter enough seismic energy to change the coda of seismic signals. Our simulations show that changes in seismic coda due to newly opened fractures are only a few percent of peak seismogram amplitudes, making signals from open cracks difficult to identify. We are developing advanced signal processing methods to identify candidate signals that originate from open cracks. These methods are based on differencing seismograms that are recorded before and after high-pressure fluid injection events to identify changes in the coda. The origins of candidate signals are located using time-reversal techniques to determine if the signals are indeed associated with a coherent structure. The source of scattered energy is compared to micro-seismic event locations to determine whether cracks opened seismically or aseismically. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-675612. JF - American Geophysical Union Fall Meeting AU - Myers, Stephen C AU - Pitarka, Arben AU - Matzel, Eric AU - Aguiar, Ana C AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51M EP - 1562 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310523?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+imaging+of+open+subsurface+fractures&rft.au=Myers%2C+Stephen+C%3BPitarka%2C+Arben%3BMatzel%2C+Eric%3BAguiar%2C+Ana+C%3BAnonymous&rft.aulast=Myers&rft.aufirst=Stephen&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 - Benthic records of seawater carbonate ion and temperature for the past 30,000 years in the Southwest Pacific Ocean AN - 1849306930; 2016-109764 AB - Records of past seawater temperature and carbonate chemistry from the interior ocean can provide insight into the role of changing ocean circulation and deep carbon storage in ice age cycles. Here we present trace element and stable isotope data from benthic foraminiferal calcite from sediment cores in New Zealand's Bay of Plenty ( approximately 37 degrees S), a region that is influenced by deep waters derived from the Pacific and Southern Oceans. Large deglacial shifts in carbonate ion ([CO (sub 3) (super 2-) ]) have been observed at approximately 1600m depth (Allen et al., 2015), likely reflecting a combination of shifting water mass boundaries and loss of CO (sub 2) from interior ocean waters. Extension of this record deeper into the ice age suggests that carbonate chemistry may also have shifted during HS2 ( approximately 23-26 ka). Mg/Ca records suggest that deep waters warmed gradually since the Last Glacial Maximum, with peak temperatures coinciding with peak [CO (sub 3) (super 2-) ] at approximately 14.5 ka during the Antarctic Cold Reversal. We discuss these records in regional context and explore the implications for ocean-climate links on millennial and ice age timescales. JF - American Geophysical Union Fall Meeting AU - Allen, Katherine A AU - Sikes, Elisabeth L AU - Hoenisch, Baerbel AU - Elmore, Aurora AU - Guilderson, Thomas P AU - Rosenthal, Yair AU - Anderson, Robert F AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract PP53D EP - 01 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/1849306930?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Benthic+records+of+seawater+carbonate+ion+and+temperature+for+the+past+30%2C000+years+in+the+Southwest+Pacific+Ocean&rft.au=Allen%2C+Katherine+A%3BSikes%2C+Elisabeth+L%3BHoenisch%2C+Baerbel%3BElmore%2C+Aurora%3BGuilderson%2C+Thomas+P%3BRosenthal%2C+Yair%3BAnderson%2C+Robert+F%3BAnonymous&rft.aulast=Allen&rft.aufirst=Katherine&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 - Modern measurements of uranium decay rates AN - 1849300282; 2016-106152 AB - It has been widely recognized that accurate and precise decay constants (lambda ) are critical to geochronology as highlighted by the EARTHTIME initiative, particularly the calibration benchmarks lambda (sub 235U) and lambda (sub 238U) . Alpha counting experiments in 1971 measured lambda (sub 235U) and lambda (sub 238U) with approximately 0.1% precision, but have never been independently validated. We are embarking on new direct measurements of lambda (sub 235U) , lambda (sub 238U) , lambda (sub 234Th) , and lambda (sub 234U) using independent approaches for each nuclide. For the measurement of lambda (sub 235U) , highly enriched (super 235) U samples will be chemically purified and analyzed for U concentration and isotopic composition by multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). Thin films will be electrodeposited from these solutions and the alpha activity will be measured in an alpha -gamma coincidence counting apparatus, which allows reduced uncertainty in counting efficiency while achieving adequate counting statistics. For lambda (sub 238U) measurement we will measure ingrowth of (super 234) Th in chemically purified, isotopically enriched (super 238) U solutions, by quantitatively separating the Th and allowing complete decay to (super 234) U. All of the measurements will be done using MC-ICP-MS aiming at 0.05% precision. This approach is expected to result in values of lambda (sub 238U) with less than 0.1% uncertainty, if combined with improved lambda (sub 234Th) measurements. These will be achieved using direct decay measurements with an E-Delta E charged particle telescope in coincidence with a gamma detector. This system allows measurement of (super 234) Th beta -decay and simultaneous detection and identification of alpha particles emitted by the (super 234) U daughter, thus observing lambda (sub 234U) at the same time. The high-precision lambda (sub 234U) obtained by the direct activity measurements can independently verify the commonly used values obtained by indirect methods. An overarching goal of the project is to ensure the quality of results including metrological traceability in order to facilitate implementation across diverse disciplines. JF - American Geophysical Union Fall Meeting AU - Parsons-Moss, Tashi AU - Faye, Sherry A AU - Williams, Ross W AU - Wang, Tzu-Fang AU - Renne, Paul R AU - Mundil, Roland AU - Harrison, Mark AU - Bandong, Bryan B AU - Moody, Kenton AU - Knight, Kimberly B AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V51A EP - 3026 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/1849300282?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Modern+measurements+of+uranium+decay+rates&rft.au=Parsons-Moss%2C+Tashi%3BFaye%2C+Sherry+A%3BWilliams%2C+Ross+W%3BWang%2C+Tzu-Fang%3BRenne%2C+Paul+R%3BMundil%2C+Roland%3BHarrison%2C+Mark%3BBandong%2C+Bryan+B%3BMoody%2C+Kenton%3BKnight%2C+Kimberly+B%3BAnonymous&rft.aulast=Parsons-Moss&rft.aufirst=Tashi&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 - Scaled tests and simulation of triboelectric charging and arc discharge in an expanding dust plume AN - 1849299624; 2016-106138 AB - The arc breakdown commonly generated in volcanic eruptions is reproduced in field experiments of rapidly expanding dust clouds driven by explosive charges. The controlled format also conveniently allows us to vary particulate content and velocities and to precisely instrument the event with radiofrequency, optical and spectral sensors. We observe electrical discharges during the turbulent phase of the cloud expansion, which we use as benchmarks to validate a multiphase 3D simulation. The simulation computes electrostatic potentials by considering the hydrodynamics, chemical kinetics and charge transport for a distribution of particle sizes entrained in the expanding gas cloud. A separate hybrid fluid/kinetic plasma code is employed to simulate the avalanche breakdown between charge pockets. Finally the propagation of radiated fields through regions of strongly dispersive partially ionized gas are computed in an electromagnetic finite element solver. Insight from the model validation may help us better understand the connection between plume dynamics and volcanic lightning. Prepared by LLNL under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Sears, Jason AU - Kuhl, Allen AU - Grote, Dave AU - Converse, Mark AU - Kueny, Chris AU - Larson, Dave AU - Poole, Brian AU - Schmidt, Andrea AU - Rose, David V AU - Kirkendall, Barry AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V44B EP - 05 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/1849299624?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Scaled+tests+and+simulation+of+triboelectric+charging+and+arc+discharge+in+an+expanding+dust+plume&rft.au=Sears%2C+Jason%3BKuhl%2C+Allen%3BGrote%2C+Dave%3BConverse%2C+Mark%3BKueny%2C+Chris%3BLarson%2C+Dave%3BPoole%2C+Brian%3BSchmidt%2C+Andrea%3BRose%2C+David+V%3BKirkendall%2C+Barry%3BAnonymous&rft.aulast=Sears&rft.aufirst=Jason&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 - New hydrogen self diffusion coefficients in olivine using nanosims AN - 1849298650; 2016-106264 AB - We have previously reported hydrogen self-diffusion coefficients for olivine in deuterium-hydrogen exchange experiments, but were only able to resolve diffusion profiles reliably in the 'fast' [100] orientation due to the limited spatial resolution of the Cameca 6f Secondary Ion Mass Spectrometry (SIMS) instrument. Samples were reanalyzed using the Cameca nanoSIMS, which enabled simultaneous measurements of diffusion coefficients in the 'fast' [100] orientation and the additional 'slow' [010] and [001] orientations to gain a complete 3D view of hydrogen self-diffusion. Measurement precision of deuterium ( (super 16) O (super 2) H with a Cs+beam) is also improved by higher vacuum, better environmental control, and lower background. Deuterium-hydrogen exchange experiments were conducted at 2 GPa between 750-900 degrees C by first saturating olivine with homogenous distribution of hydrogen ( (super 1) H) and then exchanging some of this with deuterium ( (super 2) H) in a subsequent experiment. The diffusion coefficents in the [100] orientation that were measured using the nanoSIMS are in good agreement with the previous measurements on the 6f. Diffusion coefficients in the [010] and [001] orientations are very similar in magnitude to one another, ranging between 10 (super -13) to 10 (super -14) m (super 2) /s, which is over an order of magnitude lower than the [100] orientation. Hydrogen self-diffusion is highly anisotropic in this temperature range, although the activation enthalpies for diffusion in the [010] and [001] orientations are significantly higher than that of the [100] orientation, such that there will be less anisotropy at higher temperatures relevant to the upper mantle. Comparisons between chemical and self-diffusion measurements allow us to evaluate the various stoichiometric relationships that have been proposed for accommodating hydrogen into the nominally anhydrous structure of olivine. Based on these relationships, we estimate diffusivities of other point defects, small polarons and metal vacancies, as a function of orientation. Finally, we use these new high-fidelity measurements to further advance our model on the contribution of hydrogen to the electrical conductivity of olivine and the upper mantle. JF - American Geophysical Union Fall Meeting AU - Du Frane, Wyatt L AU - Novella, Davide AU - Jacobsen, Benjamin AU - Weber, Peter K AU - Ryerson, Frederik J AU - Tyburczy, James A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V51I EP - 07 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/1849298650?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=New+hydrogen+self+diffusion+coefficients+in+olivine+using+nanosims&rft.au=Du+Frane%2C+Wyatt+L%3BNovella%2C+Davide%3BJacobsen%2C+Benjamin%3BWeber%2C+Peter+K%3BRyerson%2C+Frederik+J%3BTyburczy%2C+James+A%3BAnonymous&rft.aulast=Du+Frane&rft.aufirst=Wyatt&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 - H (sub 2) O content of nominally anhydrous mineral inclusions in diamonds from the Udachnaya kimberlite AN - 1849298627; 2016-105972 AB - Nominally anhydrous minerals (such as olivine, pyroxene and garnet) present in mantle xenoliths have been found to contain up to hundreds of ppm wt H (sub 2) O, bonded as H to their mineral structure. However, it is not well understood whether these H (sub 2) O contents are representative for the hydrous state of the deep mantle where they formed, or if they are the result of interactions between the xenoliths and metasomatic fluids or magmas during their travel to the surface. Given the fact that trace amounts of H (sub 2) O can alter the physical and chemical properties of mantle materials and therefore affect Earth's dynamics, it is important to accurately determine the H (sub 2) O content of deep mantle minerals. Natural diamonds can contain mineral inclusions that formed at high depths (>5 GPa) and are representative for the deep and inaccessible portions of the mantle where they originated. This is because the strong and inert diamond prevents the inclusions to react with any fluid or melt that get in contact with it. Therefore, valuable information regarding the H (sub 2) O content of the deep mantle can be obtained by studying these minerals trapped in diamonds. In this study we measured the H (sub 2) O contents of 10 olivine and garnet inclusions in diamonds from the Udachnaya kimberlite (Siberian craton) by Fourier Transform Infrared spectroscopy. Olivine crystals contain 1-5 ppm wt H (sub 2) O while garnets do not show absorption bands indicating the presence of detectable H in their structure and are therefore considered dry. The H (sub 2) O contents of olivine and garnet inclusions in diamonds presented here are considerably lower than those found in xenoliths or xenocrysts from the same locality. Based on these new results, we discuss the presence of H (sub 2) O in the cratonic mantle and its importance in stabilizing these areas during geological time, as well as the volatile signature of diamond forming melts in the Siberian craton. JF - American Geophysical Union Fall Meeting AU - Novella, D AU - Bolfan-Casanova, Nathalie AU - Nestola, Fabrizio AU - Harris, Jeff W AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V11C EP - 3077 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/1849298627?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=H+%28sub+2%29+O+content+of+nominally+anhydrous+mineral+inclusions+in+diamonds+from+the+Udachnaya+kimberlite&rft.au=Novella%2C+D%3BBolfan-Casanova%2C+Nathalie%3BNestola%2C+Fabrizio%3BHarris%2C+Jeff+W%3BAnonymous&rft.aulast=Novella&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 - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Significance of the cosmogenic argon correction in deciphering the (super 40) Ar/ (super 39) Ar ages of the Nakhlite (Martian) meteorites AN - 1844921047; 2016-103246 AB - All meteorites contain variable amounts of cosmogenic (super 38) Ar and (super 36) Ar produced during extraterrestrial exposure, and in order to calculate reliable (super 40) Ar/ (super 39) Ar ages this cosmogenic Ar must be removed from the total Ar budget. The amount of cosmogenic Ar has usually been calculated from the step-wise (super 38) Ar/ (super 36) Ar, minimum (super 36) Ar/ (super 37) Ar, or average (super 38) Ar cosmogenic/ (super 37) Ar from the irradiated meteorite fragment. However, if Cl is present in the meteorite, then these values will be disturbed by Ar produced during laboratory neutron irradiation of Cl. Chlorine is likely to be a particular issue for the Nakhlite group of Martian meteorites, which can contain over 1000 ppm Cl [1]. An alternative method for the cosmogenic Ar correction uses the meteorite's exposure age as calculated from an un-irradiated fragment and step-wise production rates based on the measured Ca/K [2]. This calculation is independent of the Cl concentration. We applied this correction method to seven Nakhlites, analyzed in duplicate or triplicate. Selected samples were analyzed at both Lawrence Livermore National Laboratory and SUERC to ensure inter-laboratory reproducibility. We find that the cosmogenic argon correction of [2] has a significant influence on the ages calculated for individual steps, particularly for those at lower temperatures (i.e., differences of several tens of million years for some steps). The lower-temperature steps are more influenced by the alternate cosmogenic correction method of [2], as these analyses yielded higher concentrations of Cl-derived (super 38) Ar. As a result, the Nakhlite data corrected using [2] yields step-heating spectra that are flat or nearly so across >70% of the release spectra (in contrast to downward-stepping spectra often reported for Nakhlite samples), allowing for the calculation of precise emplacement ages for these meteorites. [1] Cartwright J. A. et al. (2013) GCA, 105, 255-293. [2] Cassata W. S., and Borg L. E. (2015) 46th LPSC, Abstract #2742. JF - American Geophysical Union Fall Meeting AU - Cohen, Benjamin E AU - Cassata, William AU - Mark, Darren F AU - Tomkinson, Tim AU - Lee, Martin R AU - Smith, Caroline L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V33D EP - 3135 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/1844921047?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Significance+of+the+cosmogenic+argon+correction+in+deciphering+the+%28super+40%29+Ar%2F+%28super+39%29+Ar+ages+of+the+Nakhlite+%28Martian%29+meteorites&rft.au=Cohen%2C+Benjamin+E%3BCassata%2C+William%3BMark%2C+Darren+F%3BTomkinson%2C+Tim%3BLee%2C+Martin+R%3BSmith%2C+Caroline+L%3BAnonymous&rft.aulast=Cohen&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 - 2016-12-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Collisional disruption of gravity dominated bodies; new data and scaling AN - 1844920692; 2016-100866 AB - We present data from a suite of 169 hydrocode simulations of collisions between planetary bodies with radii from 100 to 1000 km. The data is used to derive a simple scaling law for the threshold for catastrophic disruption, defined as a collision that leads to half the total colliding mass escaping the system post impact. For a target radius 100< or =R (sub T) < or =1000 km and a mass M (sub T) and a projectile radius r (sub p) < or =R (sub T) and mass m (sub p) we find that a head-on impact with velocity magnitude nu is catastrophic if the kinetic energy of the system in the center of mass frame, K = 0.5M (sub T) m (sub p) /(M (sub T) +m (sub p) )nu (super 2) , exceeds K (super *) (sub RD) = (3.3+ or -0.6)U (sub R) , where U (sub R) = (3/5)GM (sub T) (super 2) /R (sub T) + (3/5)Gm (sub p) (super 2) /r (sub p) + GM (sub T) m (sub p) /(M (sub T) m (sub p) ) is the gravitational binding energy of the system at the moment of impact; G is the gravitational constant. Oblique impacts are catastrophic when the fraction of kinetic energy contained in the volume of the projectile intersecting the target at impact exceeds approximately 1.9 K (super *) (sub RD) for 30 degrees impacts and approximately 3.5 K (super *) (sub RD) for 45 degrees impacts. We compare predictions made with this scaling to those made with existing scaling laws in the literature extrapolated from numerical studies on smaller targets. We find significant divergence between predictions where in general our data suggest a lower threshold for disruption except for highly oblique impacts with r (sub p) <1 mm wide, and clasts can be >1 cm. This diverse breccia assemblage indicates formation via repeated impact events, supported by Rb-Sr, Sm-Nd and U-Pb ages ranging from 1.3 to 4.4 Ga. In this study we investigate the distribution of ages yielded by Ar/Ar, with nine aliquots analyzed to date, and additional analyses planned. In order to analyze only single phases, chips of matrix/clasts were restricted to visibly monomict fragments 2 Ga), supporting results of other chronometers that much older material is present in this sample. These results also demonstrate that some older fragments retained Ar during breccia formation. JF - American Geophysical Union Fall Meeting AU - Cohen, Benjamin E AU - Mark, Darren F AU - Cassata, William AU - Lee, Martin R AU - Smith, Caroline L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P33C EP - 2135 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/1840621836?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=NWA+7034+Martian+breccia%3B+Ar%2FAr+ages+of+ca.+1.2+to+1.4+Ga&rft.au=Cohen%2C+Benjamin+E%3BMark%2C+Darren+F%3BCassata%2C+William%3BLee%2C+Martin+R%3BSmith%2C+Caroline+L%3BAnonymous&rft.aulast=Cohen&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 - Deflection by kinetic impact or nuclear ablation; sensitivity to asteroid properties AN - 1840621796; 2016-095973 AB - Impulsive deflection of a threatening asteroid can be achieved by deploying either a kinetic impactor or a standoff nuclear device to impart a modest velocity change to the body. Response to each of these methods is sensitive to the individual asteroid's characteristics, some of which may not be well constrained before an actual deflection mission. Numerical simulations of asteroid deflection, using both hypervelocity impacts and nuclear ablation of the asteroid's surface, provide detailed information on asteroid response under a range of initial conditions. Here we present numerical results for the deflection of asteroids by both kinetic and nuclear methods, focusing on the roles of target body composition, strength, porosity, rotational state, shape, and internal structure. These results provide a framework for evaluating the planetary defense-related value of future asteroid characterization missions and capture some of the uncertainty that may be present in a real threat scenario. Part of this work was funded by the Laboratory Directed Research and Development Program at LLNL under project tracking code 12-ERD-005, performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-675914. JF - American Geophysical Union Fall Meeting AU - Bruck Syal, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH14B 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/1840621796?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Deflection+by+kinetic+impact+or+nuclear+ablation%3B+sensitivity+to+asteroid+properties&rft.au=Bruck+Syal%2C+M%3BAnonymous&rft.aulast=Bruck+Syal&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 - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Phase velocity and full-waveform analysis of co-located distributed acoustic sensing (DAS) channels and geophone sensor AN - 1840621256; 2016-098418 AB - A 762-meter Distributed Acoustic Sensing (DAS) array with a channel spacing of one meter was deployed at the Garner Valley Downhole Array in Southern California. The array was approximately rectangular with dimensions of 180 meters by 80 meters. The array also included two subdiagonals within the rectangle along which three-component geophones were co-located. Several active sources were deployed, including a 45-kN, swept-frequency, shear-mass shaker, which produced strong Rayleigh waves across the array. Both DAS and geophone traces were filtered in 2-Hz steps between 4 and 20 Hz to obtain phase velocities as a function of frequency from fitting the moveout of travel times over distances of 35 meters or longer. As an alternative to this traditional means of finding phase velocity, it is theoretically possible to find the Rayleigh-wave phase velocity at each point of co-location as the ratio of DAS and geophone responses, because DAS is sensitive to ground strain and geophones are sensitive to ground velocity, after suitable corrections for instrument response (Mikumo & Aki, 1964). The concept was tested in WPP, a seismic wave propagation program, by first validating and then using a 3D synthetic, full-waveform seismic model to simulate the effect of increased levels of noise and uncertainty as data go from ideal to more realistic. The results obtained from this study provide a better understanding of the DAS response and its potential for being combined with traditional seismometers for obtaining phase velocity at a single location. This analysis is part of the PoroTomo project (Poroelastic Tomography by Adjoint Inverse Modeling of Data from Seismology, Geodesy, and Hydrology, http://geoscience.wisc.edu/feigl/porotomo). JF - American Geophysical Union Fall Meeting AU - Parker, Leslie AU - Mellors, Robert J AU - Thurber, Clifford H AU - Wang, Herbert F AU - Zeng, Xiangfang AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NS41B EP - 1940 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621256?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Phase+velocity+and+full-waveform+analysis+of+co-located+distributed+acoustic+sensing+%28DAS%29+channels+and+geophone+sensor&rft.au=Parker%2C+Leslie%3BMellors%2C+Robert+J%3BThurber%2C+Clifford+H%3BWang%2C+Herbert+F%3BZeng%2C+Xiangfang%3BAnonymous&rft.aulast=Parker&rft.aufirst=Leslie&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 - Modeling hydraulic fracture induced microseismicity in rock AN - 1840617166; 2016-093650 AB - The analysis of induced microseismicity is one of the few tools available for characterizing the extent of hydraulic fracturing in the field. However, the way in which the size, location, and source mechanisms of these events relate to the fracturing process is poorly understood. Using the GEOS framework, we model the large-scale hydraulic fracturing processes using a fully coupled 3D Finite Element model (Settgast et al., URTeC, 2014) and model the small-scale microseismicity using a point approximation for a population of pre-existing discontinuities distributed throughout the model domain. In our analysis, we explore the effect of the competing influences of tectonic stress change and matrix fluid flow, anisotropy and heterogeneity in the surrounding rock mass, the population of pre-existing fractures, and the design of hydraulic fracturing treatments on the generation of microseismic events. JF - American Geophysical Union Fall Meeting AU - Sherman, C AU - Morris, J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H23A EP - 1548 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840617166?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+hydraulic+fracture+induced+microseismicity+in+rock&rft.au=Sherman%2C+C%3BMorris%2C+J%3BAnonymous&rft.aulast=Sherman&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 - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Regional evaluation of groundwater age distributions using lumped parameter models with large, sparse datasets; example from the Central Valley, California, USA AN - 1840615161; 2016-093590 AB - Tracer-based, lumped parameter models (LPMs) are an appealing way to estimate the distribution of age for groundwater because the cost of sampling wells is often less than building numerical groundwater flow models sufficiently complex to provide groundwater age distributions. In practice, however, tracer datasets are often incomplete because of anthropogenic or terrigenic contamination of tracers, or analytical limitations. While age interpretations using such datsets can have large uncertainties, it may still be possible to identify key parts of the age distribution if LPMs are carefully chosen to match hydrogeologic conceptualization and the degree of age mixing is reasonably estimated. We developed a systematic approach for evaluating groundwater age distributions using LPMs with a large but incomplete set of tracer data (3H, 3Hetrit, (super 14) C, and CFCs) from 535 wells, mostly used for public supply, in the Central Valley, California, USA that were sampled by the USGS for the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment or the USGS National Water Quality Assessment Programs. In addition to mean ages, LPMs gave estimates of unsaturated zone travel times, recharge rates for pre- and post-development groundwater, the degree of age mixing in wells, proportion of young water (<60 yrs), and the depth of the boundary between post-development and predevelopment groundwater throughout the Central Valley. Age interpretations were evaluated by comparing past nitrate trends with LPM predicted trends, and whether the presence or absence of anthropogenic organic compounds was consistent with model results. This study illustrates a practical approach for assessing groundwater age information at a large scale to reveal important characteristics about the age structure of a major aquifer, and of the water supplies being derived from it. JF - American Geophysical Union Fall Meeting AU - Jurgens, Bryant C AU - Bohlke, John Karl AU - Voss, Stefan AU - Fram, Miranda S AU - Esser, Brad AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H21F EP - 1444 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840615161?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+evaluation+of+groundwater+age+distributions+using+lumped+parameter+models+with+large%2C+sparse+datasets%3B+example+from+the+Central+Valley%2C+California%2C+USA&rft.au=Jurgens%2C+Bryant+C%3BBohlke%2C+John+Karl%3BVoss%2C+Stefan%3BFram%2C+Miranda+S%3BEsser%2C+Brad%3BAnonymous&rft.aulast=Jurgens&rft.aufirst=Bryant&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 - Sources and residence times of groundwater in Shasta County, CA determined by isotopic tracers AN - 1840615099; 2016-093595 AB - Large-volume springs are a significant source of water to communities in Shasta County. Aquifers in this region are developed in young volcanic formations and the age and flow of groundwater is not well characterized, making predicting the impact of drought and climate change on spring flow difficult. To better understand the water resources and the hydrogeology of the region and to better constrain the age of water produced by springs, we have sampled water from wells, springs, and streams for a suite of geochemical and isotopic tracers. We are using isotopic tracers because of the limited number of sampling points over a large area, leaving traditional hydrogeologic methods such as water levels and pump tests inadequate for a regional study. We analyzed samples for sulfur-35 (87.4 day half-life) and found detections in two springs, confirming the presence of a fraction of recently (1-2 years) recharged groundwater. Tritium (12.3 year half-life) activities show that some wells produce water recharged more than 5 decades ago, but most produce more recently recharged water. We will also report results for sodium-22 (2.6 year half-life), krypton-85 (10.8 year half-life), carbon-14 (5,730 year half-life), dissolved noble gases, stable isotopes of water, and helium isotopic composition. These isotopes are applied to determine the age (residence time) of groundwater over a broad age distribution, from less than one year to tens of thousands of years. These tracers should also provide information on aquifer volumes, help delineate groundwater flow, and help to identify recharge areas. A collection of groundwater ages from springs at high elevations to wells in the upper Sacramento Valley will help delineate groundwater flowpaths. Finally, groundwater residence times will help determine groundwater volume and recharge rates, and resolve questions related to drought vulnerability and effective adjustments in water resource management. JF - American Geophysical Union Fall Meeting AU - Peters, Elizabeth AU - Moran, Jean E AU - Deinhart, Amanda AU - Roberts, Sarah K AU - Esser, Brad AU - Visser, Ate AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H21F EP - 1449 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840615099?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sources+and+residence+times+of+groundwater+in+Shasta+County%2C+CA+determined+by+isotopic+tracers&rft.au=Peters%2C+Elizabeth%3BMoran%2C+Jean+E%3BDeinhart%2C+Amanda%3BRoberts%2C+Sarah+K%3BEsser%2C+Brad%3BVisser%2C+Ate%3BAnonymous&rft.aulast=Peters&rft.aufirst=Elizabeth&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 - Evaluating the information content of multiple groundwater age tracers in projecting nitrate vulnerability AN - 1840614873; 2016-093592 AB - Nitrate is one of the major sources of contamination of groundwater in the United States and around the world. In this study the applicability of multiple groundwater age tracers including (super 3) H, (super 3) He, (super 4) He, (super 14) C, (super 13) C, and (super 85) Kr in projecting future trends of nitrate concentration in several long-screened, public drinking water wells in Turlock, California, where nitrate concentrations are increasing toward the regulatory limit, is studied. Several lumped parameter models (LPM)s were considered to represent the groundwater age distribution at each well, including binary mixtures between Inverse Gaussian (young) and Dirac (old), generalized inverse Gaussian, and Levy distributions . LPM model parameters and unknown physical parameters (crustal production rate of (super 4) He, dissolved inorganic carbon contribution from rock dissolution) were estimated using a Bayesian inference, resulting in the posterior probability distribution of the parameters and therefore the uncertainty associated with each. The performance of each LPM in reproducing the data while accounting for the level of model complexity is evaluated using deviance information criteria (DIC) and Bayes Factors (BF). Historical nitrate concentration data are also evaluated as an additional tracer to refine the age distribution. We found that historical nitrate levels can reduce the uncertainty about the age distribution. LPMs with a distinct feature to represent the old fraction of groundwater (for example Inverse Gaussian-Dirac) are better at reproducing the tracer data but with the price of a larger number of parameters, which results in a larger uncertainty about the age distribution itself. Although the uncertainty regarding the shape of the age distribution remains relatively high, whether nitrate is included as a tracer or not, different models predict similar future trends in nitrate concentration. JF - American Geophysical Union Fall Meeting AU - Alikhani, Jamal AU - Massoudieh, Arash AU - Deinhart, Amanda AU - Visser, Ate AU - Esser, Brad AU - Moran, Jean E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H21F EP - 1446 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840614873?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Evaluating+the+information+content+of+multiple+groundwater+age+tracers+in+projecting+nitrate+vulnerability&rft.au=Alikhani%2C+Jamal%3BMassoudieh%2C+Arash%3BDeinhart%2C+Amanda%3BVisser%2C+Ate%3BEsser%2C+Brad%3BMoran%2C+Jean+E%3BAnonymous&rft.aulast=Alikhani&rft.aufirst=Jamal&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 - Impact of double porosity flow on hydrologically driven failure of a hillside slope AN - 1832729396; 2016-089527 AB - Soil deposits in hillside slopes often exhibit two dominant porosity scales, often referred to as the macropore and micropore scales. Fluid flow through this type of soils involves preferential flow through the macropore region and fluid storage in the micropore region. An explicit treatment of the two porosity scales, known as double porosity formulation, is necessary for a more realistic description of the hydromechanical behavior of this type of soils. In this work, we investigate how double porosity modeling of fluid flow and deformation could impact the ensuing hydromechanical responses of a hillslope under rainfall infiltration. For this purpose we use a hydromechanical continuum modeling approach developed in previous work by the authors and extend it to accommodate double porosity modeling by employing a recently developed hydromechanical framework along with a stabilized finite elements technique that allows the use of lower-order mixed finite elements for improved computationally efficiency. The numerical results demonstrate that preferential flow can be captured by the double porosity formulation, leading to a different slope failure mechanism than what is predicted by an equivalent single porosity formulation. JF - American Geophysical Union Fall Meeting AU - Choo, Jinhyun AU - White, Joshua A AU - Borja, Ronaldo I AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH41C EP - 1848 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 23:Geomorphology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832729396?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+double+porosity+flow+on+hydrologically+driven+failure+of+a+hillside+slope&rft.au=Choo%2C+Jinhyun%3BWhite%2C+Joshua+A%3BBorja%2C+Ronaldo+I%3BAnonymous&rft.aulast=Choo&rft.aufirst=Jinhyun&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 - Seismic ground motion and Boulder formation along the margins of the Dead Sea fault system, southern Israel AN - 1832729242; 2016-089465 AB - Rockfall ages in tectonically active regions provide information regarding frequency and magnitude of earthquakes. Such rockfalls have been dated using several methods including lichinometry modeling, radiocarbon and optically stimulated luminescence dating of material buried beneath boulders, and the concentration of cosmogenic nuclides in exposed boulder faces. In the hyper-arid environment of the Dead Sea fault (DSF), southern Israel, rockfalls are most probably triggered by earthquakes. We dated rockfalls along the western margin of the DSF using terrestrial cosmogenic nuclides (TCN). In Timna, where the exposure history of the boulders is relatively simple, we recognize three discrete rockfall events, at 31 ka, 15 ka, and 4.5 ka. However, the ages of the majority of the boulders concentrate at DFE4.5 ka. In Shehoret, where boulder exposure ages are more complicated, samples were collected from simultaneously exposed conjugate boulders and cliff surfaces. Pre-rockfall inheritance and post-rockfall production rates of TCN cannot be evaluated in a straightforward way. We developed a numerical code that suggests most-likely rockfall ages between 3.6+ or -0.8 and 4.7+ or -0.7 ka. Our ages agree with dated earthquakes determined in various paleoseismic studies along the entire length of the DSF and support the observation of intensive earthquake activity around 4-5 ka. Our rockfall record, however, under represents the regional earthquake record derived from historic and paleoseismic records. This under representation implies that either the ongoing development of detachment cracks prior to triggering event is slower than the earthquake cycle or that most boulder piles are formed only during big and rare earthquakes. JF - American Geophysical Union Fall Meeting AU - Matmon, Ari AU - Rinat, Yair AU - Hidy, Alan AU - Siman-Tov, Shalev AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH34A EP - 05 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832729242?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+ground+motion+and+Boulder+formation+along+the+margins+of+the+Dead+Sea+fault+system%2C+southern+Israel&rft.au=Matmon%2C+Ari%3BRinat%2C+Yair%3BHidy%2C+Alan%3BSiman-Tov%2C+Shalev%3BAnonymous&rft.aulast=Matmon&rft.aufirst=Ari&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 - Numerical investigation of the consequences of land impacts, water impacts, or air bursts of asteroids AN - 1832728719; 2016-089399 AB - The annual probability of an asteroid impact is low, but over time, such catastrophic events are inevitable. Interest in assessing the impact consequences has led us to develop a physics-based framework to seamlessly simulate the event from entry to impact, including air and water shock propagation and wave generation. The non-linear effects are simulated using the hydrodynamics code GEODYN. As effects propagate outward, they become a wave source for the linear-elastic-wave propagation code, WPP/WWP. The GEODYN-WPP/WWP coupling is based on the structured adaptive-mesh-refinement infrastructure, SAMRAI, and has been used in FEMA table-top exercises conducted in 2013 and 2014, and more recently, the 2015 Planetary Defense Conference exercise. Results from these simulations provide an estimate of onshore effects and can inform more sophisticated inundation models. The capabilities of this methodology are illustrated by providing results for different impact locations, and an exploration of asteroid size on the waves arriving at the shoreline of area cities. We constructed the maximum and minimum envelops of water-wave heights given the size of the asteroid and the location of the impact along the risk corridor. Such profiles can inform emergency response and disaster-mitigation efforts, and may be used for design of maritime protection or assessment of risk to shoreline structures of interest. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-675390-DRAFT. JF - American Geophysical Union Fall Meeting AU - Ezzedine, Souheil M AU - Dearborn, David S AU - Miller, Paul L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH11A EP - 1885 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/1832728719?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+the+consequences+of+land+impacts%2C+water+impacts%2C+or+air+bursts+of+asteroids&rft.au=Ezzedine%2C+Souheil+M%3BDearborn%2C+David+S%3BMiller%2C+Paul+L%3BAnonymous&rft.aulast=Ezzedine&rft.aufirst=Souheil&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 - Groundwater monitoring of hydraulic fracturing in California; recommendations for permit-required monitoring AN - 1832723759; 2016-091959 AB - California recently passed legislation mandating dedicated groundwater quality monitoring for new well stimulation operations. The authors provided the State with expert advice on the design of such monitoring networks. Factors that must be considered in designing a new and unique groundwater monitoring program include: Program design: The design of a monitoring program is contingent on its purpose, which can range from detection of individual well leakage to demonstration of regional impact. The regulatory goals for permit-required monitoring conducted by operators on a well-by-well basis will differ from the scientific goals of a regional monitoring program conducted by the State. Vulnerability assessment: Identifying factors that increase the probability of transport of fluids from the hydrocarbon target zone to a protected groundwater zone enables the intensity of permit-required monitoring to be tiered by risk and also enables prioritization of regional monitoring of groundwater basins based on vulnerability. Risk factors include well integrity; proximity to existing wellbores and geologic features; wastewater disposal; vertical separation between the hydrocarbon and groundwater zones; and site-specific hydrogeology. Analyte choice: The choice of chemical analytes in a regulatory monitoring program is guided by the goals of detecting impact, assuring public safety, preventing resource degradation, and minimizing cost. Balancing these goals may be best served by a tiered approach in which targeted analysis of specific chemical additives is triggered by significant changes in relevant but more easily analyzed constituents. Such an approach requires characterization of baseline conditions, especially in areas with long histories of oil and gas development. Monitoring technology: Monitoring a deep subsurface process or a long wellbore is more challenging than monitoring a surface industrial source. The requirement for monitoring multiple groundwater aquifers across a range of depths and of monitoring at deeper depths than is typical for regulatory monitoring programs requires consideration of monitoring technology, which can range from clusters of wells to multiple wells in a single wellbore to multi-level systems in a single cased wellbore. JF - American Geophysical Union Fall Meeting AU - Esser, B K AU - Beller, H R AU - Carroll, S AU - Cherry, J A AU - Jackson, R B AU - Jordan, P D AU - Madrid, V AU - Morris, J AU - Parker, B L AU - Stringfellow, W T AU - Varadharajan, C AU - Vengosh, A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H34C EP - 02 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/1832723759?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Groundwater+monitoring+of+hydraulic+fracturing+in+California%3B+recommendations+for+permit-required+monitoring&rft.au=Esser%2C+B+K%3BBeller%2C+H+R%3BCarroll%2C+S%3BCherry%2C+J+A%3BJackson%2C+R+B%3BJordan%2C+P+D%3BMadrid%2C+V%3BMorris%2C+J%3BParker%2C+B+L%3BStringfellow%2C+W+T%3BVaradharajan%2C+C%3BVengosh%2C+A%3BAnonymous&rft.aulast=Esser&rft.aufirst=B&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 - An integrated approach to predicting carbon dioxide storage capacity in carbonate reservoirs AN - 1832723750; 2016-091997 AB - Carbonate reservoirs are widespread globally but pose unique challenges for geologic carbon dioxide (CO2) storage due to the reactive nature of carbonate minerals and the inherently heterogeneous pore structures of these rock types. Carbonate mineral dissolution resulting from CO2-acidified fluids may actually create new storage capacity, but predicting the extent and location of enhanced storage is complicated by the presence of pore size distributions spanning orders of magnitude as well as common microfractures. To address this issue, core samples spanning a wide range of depths and predicted permeabilities were procured from wells drilled into the Weyburn-Midale reservoir from the IEA GHG's CO2 Monitoring and Storage Project, Saskatchewan, Canada; and from the Arbuckle dolomite at the Kansas Geological Survey's South-central Kansas CO2 Project. Our approach integrated non-invasive characterization, complex core-flooding experiments, and 3-D reactive transport simulations to calibrate relevant CO2 storage relationships among fluid flow, porosity, permeability, and chemical reactivity. The resulting observations from this work permit us to constrain (and place uncertainty limits on) some of the model parameters needed for estimating evolving reservoir CO2 storage capacity. The challenge remains, however, as to how to best interpret and implement these observations at the actual reservoir scale. We present our key findings from these projects and recommendations for storage capacity predictions. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Smith, M M AU - Hao, Y AU - Mason, H E AU - Carroll, S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H41C EP - 1307 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/1832723750?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+integrated+approach+to+predicting+carbon+dioxide+storage+capacity+in+carbonate+reservoirs&rft.au=Smith%2C+M+M%3BHao%2C+Y%3BMason%2C+H+E%3BCarroll%2C+S%3BAnonymous&rft.aulast=Smith&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 - 2016-10-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Reactive transport modeling of CO2-induced porosity and permeability changes in heterogeneous carbonate rocks AN - 1832723488; 2016-091996 AB - It has long been appreciated that chemical interactions have a major effect on rock porosity and permeability evolution and may alter the behavior or performance of both natural and engineered reservoir systems. Such reaction-induced permeability evolution is of particular importance for geological CO2 sequestration and storage associated with enhanced oil recovery. In this study we used a three-dimensional Darcy scale reactive transport model to simulate CO2 core flood experiments in which the CO2-equilibrated brine was injected into dolostone cores collected from the Arbuckle carbonate reservoir, Wellington, Kansas. Heterogeneous distributions of macro pores, fractures, and mineral phases inside the cores were obtained from X-ray computed microtomography (XCMT) characterization data, and then used to construct initial model macroscopic properties including porosity, permeability, and mineral compositions. The reactive transport simulations were performed by using the Nonisothermal Unsaturated Flow and Transport (NUFT) code, and their results were compared with experimental data. It was observed both experimentally and numerically that the dissolution fronts became unstable in highly heterogeneous and less permeable formations, leading to the development of highly porous flow paths or wormholes. Our model results indicate that the continuum-scale reactive transport models are able to adequately capture the evolution of distinct dissolution fronts as observed in carbonate rocks at a core scale. The impacts of rock heterogeneity, chemical kinetics and porosity-permeability relationships were also examined in this study. The numerical model developed in this study will not only help improve understanding of coupled physical and chemical processes controlling carbonate dissolution, but also provide a useful basis for upscaling transport and reaction properties from core scale to field scale. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Hao, Y AU - Smith, M M AU - Mason, H E AU - Carroll, S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H41C EP - 1306 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/1832723488?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reactive+transport+modeling+of+CO2-induced+porosity+and+permeability+changes+in+heterogeneous+carbonate+rocks&rft.au=Hao%2C+Y%3BSmith%2C+M+M%3BMason%2C+H+E%3BCarroll%2C+S%3BAnonymous&rft.aulast=Hao&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 - 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 - Attenuation and transport mechanisms of depleted uranium in groundwater at Lawrence Livermore National Laboratory Site 300 AN - 1828846735; 2016-086371 AB - Lawrence Livermore National Laboratory (LLNL) Site 300 was established in 1955 to support weapons research and development. Depleted uranium was used as a proxy for fissile uranium-235 ( (super 235) U) in open-air explosives tests conducted at Building 812. As a result, oxidized depleted uranium was deposited on the ground, eventually migrating to the underlying sandstone aquifer. Uranium (U) groundwater concentrations exceed the California and Federal Maximum Contaminant Level of 20 pCi L (super -1) (30 ug L (super -1) ). However, the groundwater plume appears to attenuate within 60 m of the source, beyond which no depleted U is detected. This study will determine the relative contribution of physical (e.g. dilution), chemical (e.g. surface adsorption, mineral precipitation), and biological (e.g. biotransformation) processes that contribute to the apparent attenuation of U, which exists as uranyl (UO (sub 2) (super 2+) ) complexes, at the site. Methods of investigation include evaluating 15 yr of hydrogeologic and chemical data, creating a site conceptual model, and applying equilibrium (e.g. aqueous species complexation, mineral saturation indices) and reactive transport models using Geochemist's Workbench (super TM) . Reactive transport results are constrained by direct field observations, including U major ion, and dissolved O (sub 2) concentrations, pH, and others, under varying chemical and hydraulic conditions. Aqueous speciation calculations indicate that U primarily exists as anionic CaUO (sub 2) (CO (sub 3) ) (sub 3) (super 2-) or neutral Ca (sub 2) UO (sub 2) (CO (sub 3) ) (sub 3) (super 0) species. Additionally, nucleation and growth of Ca/Mg uranyl carbonate solids are predicted to affect attenuation. Initial reactive transport results suggest surface adsorption (e.g. ion exchange, surface complexation) to layer silicate clays is limited under the aqueous geochemical conditions of the site. Current and future work includes XRD analysis of aquifer solids to constrain iron and aluminum (oxy)hydroxides, and coupling advective-dispersive transport with the chemical and physical processes. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-675707. JF - American Geophysical Union Fall Meeting AU - Danny, Kimberly Reanna AU - Taffet, M J AU - Brusseau, Mark L L AU - Chorover, Jon AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H31I EP - 1543 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/1828846735?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Attenuation+and+transport+mechanisms+of+depleted+uranium+in+groundwater+at+Lawrence+Livermore+National+Laboratory+Site+300&rft.au=Danny%2C+Kimberly+Reanna%3BTaffet%2C+M+J%3BBrusseau%2C+Mark+L+L%3BChorover%2C+Jon%3BAnonymous&rft.aulast=Danny&rft.aufirst=Kimberly&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 - "Supergreen" renewables; integration of mineral weathering into renewable energy production for air CO (sub 2) removal and storage as ocean alkalinity AN - 1828846410; 2016-086336 AB - Excess planetary CO (sub 2) and accompanying ocean acidification are naturally mitigated on geologic time scales via mineral weathering. Here, CO (sub 2) acidifies the hydrosphere, which then slowly reacts with silicate and carbonate minerals to produce dissolved bicarbonates that are ultimately delivered to the ocean. This alkalinity not only provides long-term sequestration of the excess atmospheric carbon, but it also chemically counters the effects of ocean acidification by stabilizing or raising pH and carbonate saturation state, thus helping rebalance ocean chemistry and preserving marine ecosystems. Recent research has demonstrated ways of greatly accelerating this process by its integration into energy systems. Specifically, it has been shown (1) that some 80% of the CO (sub 2) in a waste gas stream can be spontaneously converted to stable, seawater mineral bicarbonate in the presence of a common carbonate mineral - limestone. This can allow removal of CO (sub 2) from biomass combustion and bio-energy production while generating beneficial ocean alkalinity, providing a potentially cheaper and more environmentally friendly negative-CO (sub 2) -emissions alternative to BECCS. It has also been demonstrated that strong acids anodically produced in a standard saline water electrolysis cell in the formation of H (sub 2) can be reacted with carbonate or silicate minerals to generate strong base solutions. These solutions are highly absorptive of air CO (sub 2) , converting it to mineral bicarbonate in solution. When such electrochemical cells are powered by non-fossil energy (e.g. electricity from wind, solar, tidal, biomass, geothermal, etc. energy sources), the system generates H (sub 2) that is strongly CO (sub 2) -emissions-negative, while producing beneficial marine alkalinity (2-4). The preceding systems therefore point the way toward renewable energy production that, when tightly coupled to geochemical mitigation of CO (sub 2) and formation of natural ocean "antacids", forms a high capacity, negative-CO (sub 2) -emissions, "supergreen" source of fuel or electricity. 1) http://pubs.acs.org/doi/pdf/10.1021/es102671x2) http://pubs.acs.org/doi/full/10.1021/es800366q3) http://www.pnas.org/content/110/25/10095.full.pdf4) http://pubs.acs.org/doi/abs/10.1021/acs.est.5b00875 JF - American Geophysical Union Fall Meeting AU - Rau, Greg H AU - Carroll, Susan A AU - Ren, Zhiyong J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract GC52C EP - 07 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828846410?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=%22Supergreen%22+renewables%3B+integration+of+mineral+weathering+into+renewable+energy+production+for+air+CO+%28sub+2%29+removal+and+storage+as+ocean+alkalinity&rft.au=Rau%2C+Greg+H%3BCarroll%2C+Susan+A%3BRen%2C+Zhiyong+J%3BAnonymous&rft.aulast=Rau&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 - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Optimal management of geothermal heat extraction AN - 1828846362; 2016-086348 AB - Geothermal energy technologies use the constant heat flux from the subsurface in order to produce heat or electricity for societal use. As such, a geothermal energy system is not inherently variable, like systems based on wind and solar resources, and an operator can conceivably control the rate at which heat is extracted and used directly, or converted into a commodity that is used. Although geothermal heat is a renewable resource, this heat can be depleted over time if the rate of heat extraction exceeds the natural rate of renewal (Rybach, 2003). For heat extraction used for commodities that are sold on the market, sustainability entails balancing the rate at which the reservoir renews with the rate at which heat is extracted and converted into profit, on a net present value basis. We present a model that couples natural resource economic approaches for managing renewable resources with simulations of geothermal reservoir performance in order to develop an optimal heat mining strategy that balances economic gain with the performance and renewability of the reservoir. Similar optimal control approaches have been extensively studied for renewable natural resource management of fisheries and forests (Bonfil, 2005; Gordon, 1954; Weitzman, 2003). Those models determine an optimal path of extraction of fish or timber, by balancing the regeneration of stocks of fish or timber that are not harvested with the profit from the sale of the fish or timber that is harvested. Our model balances the regeneration of reservoir temperature with the net proceeds from extracting heat and converting it to electricity that is sold to consumers. We used the Non-isothermal Unconfined-confined Flow and Transport (NUFT) model (Hao, Sun, & Nitao, 2011) to simulate the performance of a sedimentary geothermal reservoir under a variety of geologic and operational situations. The results of NUFT are incorporated into the natural resource economics model to determine production strategies that maximize net present value given the performance of the geothermal resource. JF - American Geophysical Union Fall Meeting AU - Patel, Iti H AU - Bielicki, Jeffrey M AU - Buscheck, Thomas A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract GC53C EP - 1225 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/1828846362?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Optimal+management+of+geothermal+heat+extraction&rft.au=Patel%2C+Iti+H%3BBielicki%2C+Jeffrey+M%3BBuscheck%2C+Thomas+A%3BAnonymous&rft.aulast=Patel&rft.aufirst=Iti&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 - The efficacy and potential of renewable energy from carbon dioxide that is sequestered in sedimentary basin geothermal resources AN - 1828846286; 2016-086345 AB - Mitigating climate change requires increasing the amount of electricity that is generated from renewable energy technologies and while simultaneously reducing the amount of carbon dioxide (CO (sub 2) ) that is emitted to the atmosphere from present energy and industrial facilities. We investigated the efficacy of generating electricity using renewable geothermal heat that is extracted by CO (sub 2) that is sequestered in sedimentary basins. To determine the efficacy of CO (sub 2) -Geothermal power production in the United States, we conducted a geospatial resource assessment of the combination of subsurface CO (sub 2) storage capacity and heat flow in sedimentary basins and developed an integrated systems model that combines reservoir modeling with power plant modeling and economic costs. The geospatial resource assessment estimates the potential resource base for CO (sub 2) -Geothermal power plants, and the integrated systems model estimates the physical (e.g., net power) and economic (e.g., levelized cost of electricity, capital cost) performance of an individual CO (sub 2) -Geothermal power plant for a range of reservoir characteristics (permeability, depth, geothermal temperature gradient). Using coupled inverted five-spot injection patterns that are common in CO (sub 2) -enhanced oil recovery operations, we determined the well pattern size that best leveraged physical and economic economies of scale for the integrated system. Our results indicate that CO (sub 2) -Geothermal plants can be cost-effectively deployed in a much larger region of the United States than typical approaches to geothermal electricity production. These cost-effective CO (sub 2) -Geothermal electricity facilities can also be capacity-competitive with many existing baseload and renewable energy technologies over a range of reservoir parameters. For example, our results suggest that, given the right combination of reservoir parameters, LCOEs can be as low as $25/MWh and capacities can be as high as a few hundred MW. JF - American Geophysical Union Fall Meeting AU - Bielicki, Jeffrey M AU - Adams, Benjamin M AU - Choi, Hyungjin AU - Saar, Martin O AU - Taff, Steven J AU - Jamiyansuren, Bolormaa AU - Buscheck, Thomas A AU - Ogland-Hand, Jonathan AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract GC53C EP - 1222 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/1828846286?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+efficacy+and+potential+of+renewable+energy+from+carbon+dioxide+that+is+sequestered+in+sedimentary+basin+geothermal+resources&rft.au=Bielicki%2C+Jeffrey+M%3BAdams%2C+Benjamin+M%3BChoi%2C+Hyungjin%3BSaar%2C+Martin+O%3BTaff%2C+Steven+J%3BJamiyansuren%2C+Bolormaa%3BBuscheck%2C+Thomas+A%3BOgland-Hand%2C+Jonathan%3BAnonymous&rft.aulast=Bielicki&rft.aufirst=Jeffrey&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 - Calibrating NMR measured porosity/permeability relationships using mu XRCT measurements AN - 1824215463; 2016-082552 AB - Carbonate reservoirs have garnered interest for potential use in carbon capture and storage (CCS) activities. To be suitable for long term carbon dioxide (CO2) storage, they must possess sufficient permeability either through existing connected pore space, or due to reactivity with CO2-acidified fluids. Adequate assessment of the target formation permeability will rely on accurate downhole well-logging tools. Primary among these tools is nuclear magnetic resonance (NMR) well-logging. Application of this tool relies on our ability to relate the porosity and pore distributions measured by NMR to permeability. These methods are challenging to apply in carbonate reservoirs with complex mineralogies where pores sizes often span orders of magnitudes. We have assessed the ability of NMR methods to measure permeability using rocks from the Weyburn-Midale CO2 Monitoring and Storage Project Saskatchewan, Canada and the Arbuckle injection zone at the Wellington CO2 storage demonstration site, Kansas. Results of laboratory measured permeability values of these rocks indicate that the standard NMR methods for predicting permeability values can produce values off by orders of magnitude within the same flow units. In this presentation, we present the results of a combined NMR and micro X-ray computed tomography (mu XRCT) study of these rock cores to better estimate downhole permeability values of carbonate rocks. The results of the study suggest that the dramatic differences in predicted permeability values derive from large differences in the matrix porosity, pore network tortuosities, and mineralogy of the various rock units. We will present new laboratory measurements, and methodologies aimed at producing a universal NMR calibration procedure for determining permeability in carbonate reservoirs. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Mason, H E AU - Smith, M M AU - Hao, Y AU - Carroll, S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H44D 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/1824215463?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Calibrating+NMR+measured+porosity%2Fpermeability+relationships+using+mu+XRCT+measurements&rft.au=Mason%2C+H+E%3BSmith%2C+M+M%3BHao%2C+Y%3BCarroll%2C+S%3BAnonymous&rft.aulast=Mason&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 - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Coupling of multiphase flow and geomechanics in fractured porous media; application to CO (sub 2) leakages from natural and stimulated fractures AN - 1824214676; 2016-082713 AB - Leakage to the atmosphere of a significant fraction of injected CO (sub 2) would constitute a failure of a geological CO (sub 2) storage project from a greenhouse gas mitigation perspective. We present a numerical model that simulates flow and transport of CO (sub 2) into heterogeneous subsurface systems. The model, StoTran, is a flexible numerical environment that uses state-of-the-art finite element and finite volume methods and unstructured adaptive mesh refinement scheme implemented using MPI and OpenMP protocols. Multiphase flow equations and the geomechanical equations are implicitly solved and either fully or sequentially coupled. StoTran can address inverse and forward problems under deterministic or stochastic conditions. For the current study, StoTran has been used to simulate several scenarios spanning from a homogeneous single layered reservoir to heterogeneous multi-layered systems, which including cap-rock with embedded fractures, have been simulated under different operations of CO (sub 2) injection and CO (sub 2) leakages conditions. Results show the impact of the injection and leakage rates on the time evolution of the spread of the CO (sub 2) plume, its interception of the fractured cap-rock and the risk associated with the contamination of the overlaying aquifer. Spatial and temporal moments have been calculated for different, deterministic of stochastic, subsurface physical and chemical properties. Spatial moments enable assessing the extent of the region of investigation under conditions of uncertainty. Furthermore, several leakage scenarios show the intermittence behavior and development of the CO (sub 2) plume in the subsurface; its first interception with the fractures located further far from the injection well then, at a second stage, its interception with the fracture within the immediate vicinity of the injection well. We will present a remedy to CO (sub 2) leakages from the reservoir in order to enhance a long term containment of the injected CO (sub 2) . This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Ezzedine, Souheil M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR51A EP - 02 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/1824214676?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+of+multiphase+flow+and+geomechanics+in+fractured+porous+media%3B+application+to+CO+%28sub+2%29+leakages+from+natural+and+stimulated+fractures&rft.au=Ezzedine%2C+Souheil+M%3BAnonymous&rft.aulast=Ezzedine&rft.aufirst=Souheil&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 - Modeling of hydraulic fractures with poromechanical coupling using an assumed enhanced strain method AN - 1819897888; 2016-078356 AB - When modeling hydraulic fractures, it is often necessary to include tightly coupled interaction between fluid-filled fractures and the porous host rock. Further, the numerical scheme must accurately discretize processes taking place both in the rock volume and along growing fracture surfaces. This work presents a three-dimensional scheme for handling these challenging numerical issues. Solid deformation and fluid pressure in the host rock are modeled using a mixed finite-element/finite-volume scheme. The continuum formulation is enriched with an assumed enhanced strain (AES) method to represent discontinuities in the displacement field due to fractures. Fractures can be arbitrarily oriented and located with respect to the underlying mesh, and no re-meshing is necessary during fracture propagation. Flow along the fracture is modeled using a locally conservative finite volume scheme. Leak-off coupling allows for fluid exchange between the porous matrix and the fracture. We describe an efficient and scalable preconditioning process that leads to rapid convergence of the resulting discrete system. The scheme is validated using analytical examples and monitoring data from a real fractured reservoir. JF - American Geophysical Union Fall Meeting AU - Wang, Wei AU - White, Joshua A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H21E EP - 1416 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/1819897888?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+of+hydraulic+fractures+with+poromechanical+coupling+using+an+assumed+enhanced+strain+method&rft.au=Wang%2C+Wei%3BWhite%2C+Joshua+A%3BAnonymous&rft.aulast=Wang&rft.aufirst=Wei&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 - Geospatially analyzed groundwater residence time as a tool for sustainable groundwater management AN - 1819897342; 2016-078326 AB - Managing groundwater during California's drought and satisfying the requirements of the 2014 Sustainable Groundwater Management Act will require multiple approaches to quantifying rates of change in groundwater storage in the heavily exploited basins around the state. Mean groundwater residence times are useful for developing sustainability goals in that the mean residence time is a measure of the aquifer turnover, or renewal time. The California Groundwater Ambient Monitoring and Assessment program is unique among groundwater monitoring programs in that multiple analyses allow estimation of groundwater residence time. For example, over 4,000 tritium and noble gas analyses have been carried out in wells across California, allowing calculation of tritium-helium groundwater age, spatial analysis of groundwater residence times, and identification of the depth of the transition from modern to pre-modern groundwater. Areas of rapid turnover identified by young ages can be compared with areas that have been identified as being hydrogeologically vulnerable based on physical measures such as mapped permeability, confining conditions, or recharge/discharge rates. Application of groundwater residence time as a tool for sustainable groundwater management has advantages and potential pitfalls. The uncertainty associated with calculated ages and the complexity of broad age distributions in long-screened wells are some of the associated challenges. However, geospatial analysis of isotopic age data prove useful for highlighting areas where isotopic ages are not in agreement with other measures of groundwater renewal time, and where ages may therefore be helpful in setting sustainability goals. Initial comparisons suggest that isotopic ages delineate the extent of influence of artificial recharge more precisely than numerical models and that some areas in the Sierra foothills and Coast Range, identified as active recharge areas, host pre-modern groundwater, suggesting the need for a cautious assessment of sustainability. JF - American Geophysical Union Fall Meeting AU - Moran, Jean E AU - Visser, Ate AU - Singleton, Michael J AU - Hillegonds, Darren AU - Esser, Bradley K AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H21B EP - 1364 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819897342?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geospatially+analyzed+groundwater+residence+time+as+a+tool+for+sustainable+groundwater+management&rft.au=Moran%2C+Jean+E%3BVisser%2C+Ate%3BSingleton%2C+Michael+J%3BHillegonds%2C+Darren%3BEsser%2C+Bradley+K%3BAnonymous&rft.aulast=Moran&rft.aufirst=Jean&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 - Impact of thermal stresses on wellbore integrity during CO (sub 2) injection AN - 1819894228; 2016-080187 AB - Thermal stresses caused by injection of cold CO (sub 2) into warmer storage reservoirs could create leakage pathways out of the storage reservoir. Although few studies have been conducted to investigate the well bore integrity subjected to thermal cycling during CO (sub 2) injection, a systematic investigation on thermally induced expansion and contraction affecting the debonding and cracking of the well barrier materials has not yet been performed. In this work, we have analyzed the thermo-mechanical characteristics of the well barrier materials undergoing repeated thermal cycling using a multiscale, multiphysics platform named GEOS. More specifically, we model the modes of failure during thermal cycling to assess the temperature range for minimal impact on well integrity. A finite element solver was used for the geomechanics and a finite volume solver was used for the thermal diffusion. Results of the initiation and propagation of fractures due to temperature variations in the cement sheath are presented. Preliminary results suggest that radial fracture develops as the cement is heated while debonding occurs in the casing-cement and cement-rock interfaces during the cooling period. The effects of different confinement conditions based on in-situ stresses were also analyzed. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under the Contract DE-AC52-07NA27344. This work has been produced with support from the BIGCCS Centre, performed under the Norwegian research program Centres for Environment-friendly Energy Research (FME) and the KPN project Ensuring well integrity during CO (sub 2) injection. The authors acknowledge the following partners for their contributions: Gassco, Shell, Statoil, TOTAL, GDF SUEZ and the Research Council of Norway (193816/S60 and 23389). JF - American Geophysical Union Fall Meeting AU - Roy, Pratanu AU - Walsh, Stuart AU - Morris, Joseph AU - Carroll, Susan AU - Hao, Yue AU - Iyer, Jaisree AU - Torsater, Malin AU - Gawel, Kamila AU - Todorovic, Jelena AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11B EP - 1340 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/1819894228?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+thermal+stresses+on+wellbore+integrity+during+CO+%28sub+2%29+injection&rft.au=Roy%2C+Pratanu%3BWalsh%2C+Stuart%3BMorris%2C+Joseph%3BCarroll%2C+Susan%3BHao%2C+Yue%3BIyer%2C+Jaisree%3BTorsater%2C+Malin%3BGawel%2C+Kamila%3BTodorovic%2C+Jelena%3BAnonymous&rft.aulast=Roy&rft.aufirst=Pratanu&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 - Bayesian nitrate source apportionment to individual groundwater wells in the Central Valley by use of elemental and isotopic tracers AN - 1819894150; 2016-080210 AB - Groundwater quality is a concern in alluvial aquifers that underlie agricultural areas, such as in the San Joaquin Valley of California. Nitrate from fertilizers and animal waste can leach to groundwater and contaminate drinking water resources. Dairy manure and synthetic fertilizers are prevailing sources of nitrate in groundwater for the San Joaquin Valley with septic waste contributing as a major source in some areas. The rural population in the San Joaquin Valley relies almost exclusively on shallow domestic wells (less than 150 m deep), of which many have been affected by nitrate. Knowledge of the proportion of each of the three main nitrate sources (manure, synthetic fertilizer, and septic waste) contributing to individual well nitrate can aid future regulatory decisions. Mixing models quantify the proportional contributions of sources to a mixture by using the concentration of conservative tracers within each source as a source signature. Deterministic mixing models are common, but do not allow for variability in the tracer source concentration or overlap of tracer concentrations between sources. In contrast, Bayesian mixing models treat source contributions probabilistically, building statistical variation into the inferences for each well. The authors developed a Bayesian mixing model on a pilot network of 56 private domestic wells in the San Joaquin Valley for which nitrogen, oxygen, and boron isotopes as well as nitrate and iodine were measured. Nitrogen, oxygen, and boron isotopes as well as iodine can be used as tracers to differentiate between manure, fertilizers, septic waste, and natural sources of nitrate (which can contribute nitrate in concentrations up to 4 mg/L). In this work, the isotopic and elemental tracers were used to estimate the proportional contribution of manure, fertilizers, septic waste, and natural sources to overall groundwater nitrate concentration in individual wells. Prior distributions for the four tracers for each of the four sources were estimated based on end member measurements, literature, or as a part of our previous work. The Bayesian method produces estimates of the fractional source contributions to each well, which can be compared to surrounding landuse types. Estimated source contributions were broadly consistent with nearby landuse types in this sample. JF - American Geophysical Union Fall Meeting AU - Ransom, Katherine AU - Grote, Mark N AU - Deinhart, Amanda AU - Eppich, Gary AU - Kendall, Carol AU - Sanborn, Matthew AU - Souders, Kate AU - Wimpenny, Joshua AU - Yin, Qing-Zhu AU - Young, Megan B AU - Harter, Thomas AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11F EP - 1420 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/1819894150?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Bayesian+nitrate+source+apportionment+to+individual+groundwater+wells+in+the+Central+Valley+by+use+of+elemental+and+isotopic+tracers&rft.au=Ransom%2C+Katherine%3BGrote%2C+Mark+N%3BDeinhart%2C+Amanda%3BEppich%2C+Gary%3BKendall%2C+Carol%3BSanborn%2C+Matthew%3BSouders%2C+Kate%3BWimpenny%2C+Joshua%3BYin%2C+Qing-Zhu%3BYoung%2C+Megan+B%3BHarter%2C+Thomas%3BAnonymous&rft.aulast=Ransom&rft.aufirst=Katherine&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 - Hydro-period influence on kettle hole biogeochemistry in NE Germany AN - 1819893096; 2016-080196 AB - Hydro-Period influence on kettle hole biogeochemistry in NE Germany Kettle holes are glacially created ponds (<0.01 km (super 2) ) that form within landscape depressions and, while small, they are numerous across young moraine landscapes in Europe and North America. Kettle holes are only seasonally connected to streams or groundwater and therefore they undergo pronounced short-term changes in the hydro-periods, i.e. water level fluctuations that include complete desiccation and rewetting. Little is known about kettle hole biogeochemistry in NE Germany, especially with regards to the hydro-period. We hypothesized that a connection exists between kettle hole hydro-period and sediment biogeochemistry. We surveyed kettle hole water in NE Germany over several years to capture the seasonal isotopic composition (delta D, delta (super 18) O). Within a subset of the surveyed kettle holes we measured the delta (super 13) C and delta (super 15) N composition of sediments at two different depths from one season. Our objective was to link the abiotic influences demarked by the evaporative isotopic signal from kettle hole water, to biotic processes, such as microbial turnover and contributions of vegetation, imprinted in the delta (super 13) C and delta (super 15) N signals in sediment organic matter. Based on the upper sediment isotopic signal, we were able to classify two categories: permanently and temporarily filled kettle holes. Other kettle holes, for example those found in forests, were not as easily classified. Within the deeper sediment layers we found a distinct curve linear response between delta (super 15) N and C/N ratios, where temporarily filled kettle holes were consistently enriched, indicating a higher level of microbial transformation. We evaluated our evaporation estimates against the sediment-based classification to test evaporation as a major mechanism behind kettle hole biogeochemistry. While the temporarily filled kettle holes are the most biogeochemically dynamic, due in large part to their hydro-period, the mechanisms underlying the hydro-period and the concurrent effects on biogeochemical cycles are diverse. JF - American Geophysical Union Fall Meeting AU - Kayler, Zachary E AU - Badrian, Maria AU - Frackowski, Adam AU - Nitzsche, Kai N AU - Rieckh, Helene AU - Gessler, Arthur AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11E EP - 1392 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819893096?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Hydro-period+influence+on+kettle+hole+biogeochemistry+in+NE+Germany&rft.au=Kayler%2C+Zachary+E%3BBadrian%2C+Maria%3BFrackowski%2C+Adam%3BNitzsche%2C+Kai+N%3BRieckh%2C+Helene%3BGessler%2C+Arthur%3BAnonymous&rft.aulast=Kayler&rft.aufirst=Zachary&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 - Ice-free Greenland during the mid-Pleistocene? AN - 1815675001; 2016-074059 AB - In the face of accelerated ice sheet contribution to sea level rise, in part fueled by rapid thinning and retreat of marine terminating outlet glaciers, it remains uncertain how the Greenland Ice Sheet (GrIS) will adjust to a warming Arctic, declining sea ice and related changing precipitation patterns. This is concerning, given that future sea level rise is strongly dependent on the GrIS's response to Arctic change. The scientific community is currently torn between a model of a dynamic GrIS that becomes greatly reduced during interglacials and a model where the GrIS is relatively stable, even through interglacials that were warmer than today. We review the paleo-stability of the GrIS and discuss the implications for GrIS predictions. Based on new cosmogenic data from the bedrock core drilled underneath the GISP2 ice core, we present the case that Greenland might have been free of ice at least once during the Pleistocene, highlighting its vulnerability. An immediate climate driver for the GrIS collapse is not evident from the existing paleo-climate database, motivating re-intensified research of physical mechanisms to melt the GrIS. We discuss a few preliminary climate scenarios that might have contributed to this dramatic ice-sheet collapse. On the shorter time-scale, we present tentative strategies how to investigate the stability of the GrIS during the Holocene Climate Optimum, a period of arguable-warmer-than today temperatures. Finally, we summarize the value of the paleo-data for predictions of the GrIS stability. JF - American Geophysical Union Fall Meeting AU - Schaefer, Joerg M AU - Finkel, Robert C AU - Caffee, Marc W AU - Alley, Richard B AU - Balco, Greg AU - Zimmerman, Susan R H AU - Briner, Jason P AU - Young, Nicolas E AU - Schwartz, Roseanne AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract GC14C 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/1815675001?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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-free+Greenland+during+the+mid-Pleistocene%3F&rft.au=Schaefer%2C+Joerg+M%3BFinkel%2C+Robert+C%3BCaffee%2C+Marc+W%3BAlley%2C+Richard+B%3BBalco%2C+Greg%3BZimmerman%2C+Susan+R+H%3BBriner%2C+Jason+P%3BYoung%2C+Nicolas+E%3BSchwartz%2C+Roseanne%3BAnonymous&rft.aulast=Schaefer&rft.aufirst=Joerg&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 - Ramp compression of copper and a pressure standard to 450 GPa AN - 1815673255; 2016-075867 AB - Diamond anvil cell pressure standards such as copper, tungsten, gold, and platinum are calibrated by reducing Hugoniot data to an isentrope or isotherm using a model for the thermal pressure. At pressures below the bulk modulus of the sample, the correction for the thermal pressure is relatively small and therefore the uncertainties in the thermal model are not significant. However, as stresses in diamond anvil cells are achieving pressures of 4-10 Mbar, reducing Hugoniot data to an isotherm requires a tremendous thermal pressure correction and uncertainties in the reduced isotherm are unconstrained. Here we present ramp-wave compression experiments at the Sandia Z-Machine that we use to constrain the equation of state of copper to a stress state of nearly 5 Mbar. We use the iterative Lagrangian analysis technique, developed by Rothman and Maw, to determine the stress-strain path. We correct for the plastic work heating and the deviatoric stress contribution to the stress-density measurement to obtain an isentrope. Our measured isentrope compares well with our shock-wave reduced isentrope at low pressures and provides an accurate pressure standard for diamond anvil cells at extreme conditions. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Kraus, Richard G AU - Davis, Jean Paul AU - Seagle, Christopher T AU - Fratanduono, Dayne AU - Swift, Damian AU - Eggert, Jon AU - Collins, Gilbert Wilson AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR13C EP - 2722 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815673255?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Ramp+compression+of+copper+and+a+pressure+standard+to+450+GPa&rft.au=Kraus%2C+Richard+G%3BDavis%2C+Jean+Paul%3BSeagle%2C+Christopher+T%3BFratanduono%2C+Dayne%3BSwift%2C+Damian%3BEggert%2C+Jon%3BCollins%2C+Gilbert+Wilson%3BAnonymous&rft.aulast=Kraus&rft.aufirst=Richard&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 - Searching for the hydrogen plasma phase transition on the national ignition facility AN - 1815673017; 2016-075868 AB - New dynamic-compression techniques allow scientists to recreate the material states expected to exist in the deep interiors of planets, including the newly discovered extra solar planets. At the conditions existing deep inside stars and planets, pressure produces highly degenerate conditions (strong quantum effects), with atoms brought closer than the Bohr radius. State-of-the-art calculations indicate that such strong degeneracy effects induce the insulator-conductor transition in fluid hydrogen to become first-order, i.e. discontinuous, at temperatures below about 2500 K. This phase transition is called the Plasma Phase Transition (PPT). This problem challenges the most advanced simulations and theories resulting in a span of proposed conditions for the PPT from 1 to 5 Mbar, between 1000 and 2500 K. At higher temperature the metallization onset is thought to be continuous. We will present recent experiments using a reverberation compression scheme on the National Ignition Facility to compress cryogenic deuterium up to several megabars (1Mbar=100 GPa) while keeping the temperature much lower than using single shock compression. JF - American Geophysical Union Fall Meeting AU - Millot, Marius A AU - Collins, Gilbert Wilson AU - Jeanloz, Raymond AU - Hemley, Russell J AU - Goncharov, Alexander F AU - Loubeyre, Paul AU - Brygoo, Stephanie AU - McWilliams, Ryan Stewart AU - Celliers, Peter M AU - Eggert, Jon AU - Rygg, J Ryan AU - Le Pape, Sebastien AU - Fratanduono, Dayne AU - Hamel, Sebastien AU - Peterson, Luc AU - Meezan, Nathan AU - Braun, David AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR13C EP - 2723 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/1815673017?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Searching+for+the+hydrogen+plasma+phase+transition+on+the+national+ignition+facility&rft.au=Millot%2C+Marius+A%3BCollins%2C+Gilbert+Wilson%3BJeanloz%2C+Raymond%3BHemley%2C+Russell+J%3BGoncharov%2C+Alexander+F%3BLoubeyre%2C+Paul%3BBrygoo%2C+Stephanie%3BMcWilliams%2C+Ryan+Stewart%3BCelliers%2C+Peter+M%3BEggert%2C+Jon%3BRygg%2C+J+Ryan%3BLe+Pape%2C+Sebastien%3BFratanduono%2C+Dayne%3BHamel%2C+Sebastien%3BPeterson%2C+Luc%3BMeezan%2C+Nathan%3BBraun%2C+David%3BAnonymous&rft.aulast=Millot&rft.aufirst=Marius&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 - Reflectivities of four shock-compressed alkali halides AN - 1815672988; 2016-075874 AB - Laser-shock compression on four alkali halides has been used to probe the transition from insulating to metallic states, a high-pressure transition in chemical bonding that has fundamental implications for planetary formation and structure. Collectively, pressures up to 450 GPa and densities up to three-fold compression were explored across a total of fourteen single-crystal samples of CsI, CsBr, KBr and NaCl. Velocity interferometry was used to record shock velocities and reflectivities at 532 nm during decaying shock compression. The data show up to 40% (or higher) reflectivity, corresponding to notable electrical conductivities, in response to high pressures and temperatures. Furthermore, band-gap closure, dependent on density, can be examined from the reflectivity data. Ionic salts are simple model systems amenable to first-principles theory and serve as analog materials for predicting whether specific chemical constituents can reside in the rocky mantles or metallic cores of planets. A key objective is to disentangle the complementary roles of temperature and compression in transforming ionic into metallic bonding. Furthermore, at high pressures CsI becomes analogous to Xe: they are isoelectronic and follow matching equations of state. Therefore, studies on CsI could inform understanding of noble-gas geochemistry at conditions deep inside planets. JF - American Geophysical Union Fall Meeting AU - Diamond, Matthew R AU - McWilliams, Ryan Stewart AU - Eggert, Jon AU - Jeanloz, Raymond AU - Ali, Suzanne J AU - Collins, Gilbert Wilson AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR13C EP - 2730 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/1815672988?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reflectivities+of+four+shock-compressed+alkali+halides&rft.au=Diamond%2C+Matthew+R%3BMcWilliams%2C+Ryan+Stewart%3BEggert%2C+Jon%3BJeanloz%2C+Raymond%3BAli%2C+Suzanne+J%3BCollins%2C+Gilbert+Wilson%3BAnonymous&rft.aulast=Diamond&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 - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Sound speed of liquid iron along the outer core isentrope; new pre-heated ramp compression experiments AN - 1815670744; 2016-075819 AB - Detailed elasticity data on liquid Fe and candidate molten core alloys should offer new constraints on the under-constrained problem of Earth's core composition. Density, sound speed, and the gradient in sound speed with pressure are each potentially distinct experimental constraints and are each well-known for Earth. The gradient in sound speed, though, has not been used because sound speed depends on both T and P, such that data must be collected or reconstructed along the correct, nearly adiabatic, thermal profile. Reconstruction requires the Gruneisen gamma , which is composition-dependent, and data over a large P-T space to allow extrapolation. Both static and dynamic compression methods could be used, but the conditions (140 - 330 GPa and 4000 - 6000 K) are very challenging for static methods and standard shock compression only samples the outer core P-T profile at a single P. Instead we are applying quasi-isentropic dynamic ramp compression, using pre-heating of the target and impedance of the leading edge of a graded-density impactor (GDI) to select a probable outer core isentrope. The target material is melted and raised to a point on the outer core isentrope by the initial shock, then quasi-isentropically ramped to a maximum P by increasing shock impedance of trailing GDI layers. Particle velocity is monitored by photonic doppler velocimetry (PDV) at two step thicknesses at the interface of Fe or Fe-alloy target and MgO windows. The difference in arrival time of each particle velocity at the two steps directly gives the Lagrangian sound speed vs. particle velocity, which is integrated to obtain Pand density. At the writing of this abstract, we have completed one shot of this type. We successfully heated a two-step Fe target in a Mo capsule with MgO windows to 1350 degrees C, maintaining sufficient alignment and reflectivity to collect PDV signal returns. We characterized the velocity correction factor for PDV observation through MgO windows, and have confirmed that MgO remains sufficiently transparent on this loading path to act as a window. Our shot used a Mg-Ta graded density impactor launched at 5.6 km/s by the Caltech two-stage light gas gun, providing continuous sampling of the sound speed of liquid Fe from 70 GPa and approximately 2800 K up the isentrope to 243 GPa. Analysis continues. Prepared by LLNL under Contract DE-AC52-07NA27344 JF - American Geophysical Union Fall Meeting AU - Asimow, Paul D AU - Nguyen, Jeffrey AU - Akin, Minta C AU - Fat'yanov, Oleg V AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR12A 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/1815670744?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sound+speed+of+liquid+iron+along+the+outer+core+isentrope%3B+new+pre-heated+ramp+compression+experiments&rft.au=Asimow%2C+Paul+D%3BNguyen%2C+Jeffrey%3BAkin%2C+Minta+C%3BFat%27yanov%2C+Oleg+V%3BAnonymous&rft.aulast=Asimow&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 - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Shock melting of forsterite by in-situ X-ray diffraction AN - 1815670720; 2016-075869 AB - The equation of state of magnesium silicates at pressures and temperatures near the solid-liquid coexistence curve is important for understanding the thermal evolution and interior structure of rocky planets. Here, we present a series of laser driven shock-melt experiments on single crystal Mg (sub 2) SiO (sub 4) forsterite, conducted at the Omega EP laser facility. Particle velocities in the Mg (sub 2) SiO (sub 4) samples were measured using a line VISAR and used to infer the thermodynamic state of the shocked samples. In situ X-ray diffraction measurements are used to probe the melting transition and investigate the potential decomposition of Mg (sub 2) SiO (sub 4) in to MgO and MgSiO (sub 3) upon melt. This work examines potential kinetic effects of decomposition due to the short time scale of laser-shock experiments. In addition, the thermodynamic data collected in these experiments adds to a limited body of information regarding the equation of state of Mg (sub 2) SiO (sub 4) , which is the dominant end member composition in Earth's upper mantle. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Newman, Matthew AU - Kraus, Richard G AU - Wicks, June K AU - Coppari, Frederica AU - Smith, Raymond AU - Duffy, Thomas S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR13C EP - 2724 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/1815670720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Shock+melting+of+forsterite+by+in-situ+X-ray+diffraction&rft.au=Newman%2C+Matthew%3BKraus%2C+Richard+G%3BWicks%2C+June+K%3BCoppari%2C+Frederica%3BSmith%2C+Raymond%3BDuffy%2C+Thomas+S%3BAnonymous&rft.aulast=Newman&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 - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Upper mantle discontinuity structure beneath the western Atlantic Ocean and eastern North America from SS precursors AN - 1812216073; 2016-068763 AB - Seismic discontinuities within the mantle arise from a wide range of mechanisms, including changes in mineralogy, major element composition, melt content, volatile abundance, anisotropy, or a combination of the above. In particular, the depth and sharpness of upper mantle discontinuities at 410 and 660 km depth are attributed to solid-state phase changes sensitive to both mantle temperature and composition, where regions of thermal heterogeneity produce topography and chemical heterogeneity changes the impedance contrast across the discontinuity. Seismic mapping of this topography and sharpness thus provides constraint on the thermal and compositional state of the mantle. The EarthScope USArray is providing unprecedented access to a wide variety of new regions previously undersampled by the SS precursors. This includes the boundary between the oceanic plate in the western Atlantic Ocean and continental margin of eastern North America. Here we use a seismic array approach to image the depth, sharpness, and topography of the upper mantle discontinuities, as well as other possible upper mantle reflectors beneath this region. This array approach utilizes seismic waves that reflect off the underside of a mantle discontinuity and arrive several hundred seconds prior to the SS seismic phase as precursory energy. In this study, we collected high-quality broadband data SS precursors data from shallow focus (<30 km deep), mid-Atlantic ridge earthquakes recorded by USArray seismometers in Alaska. We generated 4th root vespagrams to enhance the SS precursors and determine how they sample the mantle. Our data show detection of localized structure on the discontinuity boundaries as well as additional horizons, such as the X-discontinuity and a potential reflection from a discontinuity near the depth of the lithosphere-asthenosphere boundary. These structures are related to the transition from predominantly old ocean lithosphere to underlying continental lithosphere, as while deeper reflectors are associated with the subduction of the ancient Farallon slab. A comparison of the depth of upper mantle discontinuities to changes in seismic velocity and anisotropy will further quantify the relationship to mantle flow, compositional layering, and phases changes. JF - American Geophysical Union Fall Meeting AU - Schmerr, Nicholas C AU - Beghein, Caroline AU - Kostic, Dimitrije AU - Baldridge, Alice M AU - West, John D AU - Nittler, Larry R AU - Bull, Abigail Louise AU - Montesi, Laurent AU - Byrne, Paul K AU - Hummer, Daniel R AU - Plescia, Jeffrey B AU - Elkins-Tanton, Linda T AU - Lekic, Vedran AU - Schmidt, Britney E AU - Elkins, Lynne J AU - Cooper, Catherine M AU - ten Kate, Inge Loes AU - van Hinsbergen, Douwe J J AU - Parai, Rita AU - Glass, Jennifer B AU - Ni, James AU - Fuji, Nobuaki AU - McCubbin, Francis M AU - Michalski, Joseph R AU - Zhao, Chunpeng AU - Arevalo, Ricardo D, Jr AU - Koelemeijer, Paula AU - Courtier, Anna M AU - Dalton, Heather AU - Waszek, Lauren AU - Bahamonde, Joan AU - Schmerr, Ben AU - Gilpin, Nibbler AU - Rosenshein, Ellen AU - Mach, Kimberly AU - Ostrach, Lillian Rose AU - Caracas, Razvan AU - Craddock, Robert Anthony AU - Moore-Driskell, Melissa M AU - Du Frane, Wyatt L AU - Kellogg, Louise H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract DI11C EP - 2615 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/1812216073?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Upper+mantle+discontinuity+structure+beneath+the+western+Atlantic+Ocean+and+eastern+North+America+from+SS+precursors&rft.au=Schmerr%2C+Nicholas+C%3BBeghein%2C+Caroline%3BKostic%2C+Dimitrije%3BBaldridge%2C+Alice+M%3BWest%2C+John+D%3BNittler%2C+Larry+R%3BBull%2C+Abigail+Louise%3BMontesi%2C+Laurent%3BByrne%2C+Paul+K%3BHummer%2C+Daniel+R%3BPlescia%2C+Jeffrey+B%3BElkins-Tanton%2C+Linda+T%3BLekic%2C+Vedran%3BSchmidt%2C+Britney+E%3BElkins%2C+Lynne+J%3BCooper%2C+Catherine+M%3Bten+Kate%2C+Inge+Loes%3Bvan+Hinsbergen%2C+Douwe+J+J%3BParai%2C+Rita%3BGlass%2C+Jennifer+B%3BNi%2C+James%3BFuji%2C+Nobuaki%3BMcCubbin%2C+Francis+M%3BMichalski%2C+Joseph+R%3BZhao%2C+Chunpeng%3BArevalo%2C+Ricardo+D%2C+Jr%3BKoelemeijer%2C+Paula%3BCourtier%2C+Anna+M%3BDalton%2C+Heather%3BWaszek%2C+Lauren%3BBahamonde%2C+Joan%3BSchmerr%2C+Ben%3BGilpin%2C+Nibbler%3BRosenshein%2C+Ellen%3BMach%2C+Kimberly%3BOstrach%2C+Lillian+Rose%3BCaracas%2C+Razvan%3BCraddock%2C+Robert+Anthony%3BMoore-Driskell%2C+Melissa+M%3BDu+Frane%2C+Wyatt+L%3BKellogg%2C+Louise+H%3BAnonymous&rft.aulast=Schmerr&rft.aufirst=Nicholas&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 - Late glacial and Holocene history of the Greenland ice sheet margin, Nunatarssuaq, northwestern Greenland AN - 1812213766; 2016-068650 AB - Defining the late glacial and Holocene fluctuations of the Greenland Ice Sheet (GrIS) margin, particularly during periods that were as warm or warmer than present, provides a longer-term perspective on present ice margin fluctuations and informs how the GrIS may respond to future climate conditions. We focus on mapping and dating past GrIS extents in the Nunatarssuaq region of northwestern Greenland. During the summer of 2014, we conducted geomorphic mapping and collected rock samples for (super 10) Be surface exposure dating as well as subfossil plant samples for (super 14) C dating. We also obtained sediment cores from an ice-proximal lake. Preliminary (super 10) Be ages of boulders deposited during deglaciation of the GrIS subsequent to the Last Glacial Maximum range from approximately 30-15 ka. The apparently older ages of some samples indicate the presence of (super 10) Be inherited from prior periods of exposure. These ages suggest deglaciation occurred by approximately 15 ka however further data are needed to test this hypothesis. Subfossil plants exposed at the GrIS margin on shear planes date to approximately 4.6-4.8 cal. ka BP and indicate less extensive ice during middle Holocene time. Additional radiocarbon ages from in situ subfossil plants on a nunatak date to approximately 3.1 cal. ka BP. Geomorphic mapping of glacial landforms near Nordso, a large proglacial lake, including grounding lines, moraines, paleo-shorelines, and deltas, indicate the existence of a higher lake level that resulted from a more extensive GrIS margin likely during Holocene time. A fresh drift limit, characterized by unweathered, lichen-free clasts approximately 30-50 m distal to the modern GrIS margin, is estimated to be late Holocene in age. (super 10) Be dating of samples from these geomorphic features is in progress. Radiocarbon ages of subfossil plants exposed by recent retreat of the GrIS margin suggest that the GrIS was at or behind its present location at AD approximately 1650-1800 and approximately 1816-1889. Results thus far indicate that the GrIS margin in northwestern Greenland responded sensitively to Holocene climate changes. Ongoing research will improve the chronological constraints on these fluctuations. JF - American Geophysical Union Fall Meeting AU - Farnsworth, Lauren B AU - Kelly, Meredith A AU - Axford, Yarrow AU - Bromley, Gordon R AU - Osterberg, Erich C AU - Howley, Jennifer A AU - Zimmerman, Susan R H AU - Jackson, Margaret Scott AU - Lasher, Gregory Everett AU - McFarlin, Jamie Marie AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C51B EP - 0693 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/1812213766?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Late+glacial+and+Holocene+history+of+the+Greenland+ice+sheet+margin%2C+Nunatarssuaq%2C+northwestern+Greenland&rft.au=Farnsworth%2C+Lauren+B%3BKelly%2C+Meredith+A%3BAxford%2C+Yarrow%3BBromley%2C+Gordon+R%3BOsterberg%2C+Erich+C%3BHowley%2C+Jennifer+A%3BZimmerman%2C+Susan+R+H%3BJackson%2C+Margaret+Scott%3BLasher%2C+Gregory+Everett%3BMcFarlin%2C+Jamie+Marie%3BAnonymous&rft.aulast=Farnsworth&rft.aufirst=Lauren&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 - New constraints on the deglaciation chronology of the southeastern margin of the Greenland ice sheet AN - 1812213218; 2016-068647 AB - The Greenland Ice Sheet (GrIS) is responding rapidly to climate change. Marine terminating outlet glaciers that drain the GrIS have responded especially sensitively to present-day climate change by accelerating, thinning and retreating. In southeastern Greenland several outlet glaciers are undergoing rapid changes in mass balance and ice dynamics. To improve our understanding of the future, long-term response of these marine-terminating outlet glaciers to climate change, we focus on the response of three outlet glaciers to climate change since the Last Glacial Maximum. The timing and rates of late-glacial and early Holocene deglaciation of the southeastern sector of the GrIS are relatively unconstrained due to the inaccessibility of the region. Using a helicopter and a sailboat, we collected samples for (super 10) Be surface exposure dating from three fjords in southeastern Greenland: Skjoldungen (63.4N), Uvtorsiutit (62.7N), and Lindenow (60.6N). These fjords drain marine terminating glaciers of the GrIS. Here we present 18 new 10Be ages from approximately 50 km long transects along these fjords that mark the timing of deglaciation from the outer coast inland to the present-day GrIS margin. Together with previously constrained deglaciation chronologies from Bernstorffs, Sermilik, and Kangerdlussuaq fjords in southeastern Greenland, these new chronologies offer insight into the late-glacial and early Holocene dynamics of the southeastern GrIS outlet glaciers. We compare the timing and rate of deglaciation in southeastern Greenland to climate records from the region to examine the mechanisms that drove deglaciation during late-glacial and early Holocene time. These new (super 10) Be ages provide a longer-term perspective of marine terminating outlet glacier fluctuations in southeastern Greenland and can be used to model the ice sheet's response to late-glacial and early Holocene climate changes. JF - American Geophysical Union Fall Meeting AU - Levy, Laura B AU - Larsen, Nicolaj K AU - Kjaer, Kurt Henrik AU - Bjork, Anders A AU - Kjeldsen, Kristian K AU - Funder, Svend AU - Kelly, Meredith A AU - Howley, Jennifer A AU - Zimmerman, Susan R H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C51B EP - 0690 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/1812213218?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=New+constraints+on+the+deglaciation+chronology+of+the+southeastern+margin+of+the+Greenland+ice+sheet&rft.au=Levy%2C+Laura+B%3BLarsen%2C+Nicolaj+K%3BKjaer%2C+Kurt+Henrik%3BBjork%2C+Anders+A%3BKjeldsen%2C+Kristian+K%3BFunder%2C+Svend%3BKelly%2C+Meredith+A%3BHowley%2C+Jennifer+A%3BZimmerman%2C+Susan+R+H%3BAnonymous&rft.aulast=Levy&rft.aufirst=Laura&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 - An ancient slab visible from the transition zone to the deep mantle beneath the southern Indian Ocean AN - 1807509389; 2016-066858 AB - Ancient subducted tectonic plates have been observed in past seismic images of the mantle beneath North America and Eurasia including some that subducted before the end of the Mesozoic Era. It is likely that other ancient slab structures have remained largely hidden, particularly in the seismic-data-limited regions beneath the vast oceans in the southern hemisphere. Here we present a new global tomographic image, which shows a slab-like structure beneath the southern Indian Ocean with coherency from the upper mantle transition zone to the core-mantle boundary region - with striking similarities to past and current images of the Farallon slab. Based on the image and additional geoscientific observations, we postulate that the structure is an oceanic plate that sank into the mantle along a 7000-km intra-oceanic subduction zone that migrated southwestward across the ancient Tethys Ocean in the Mesozoic Era, perhaps beginning prior to 200 Ma. Slab material still trapped in the transition zone is positioned near the former edge of East Gondwana ca. 140 Ma suggesting that subduction terminated near the margin of the ancient continent prior to breakup and subsequent dispersal of its subcontinents. If our interpretation is correct, the slab likely represents the first of its kind with extensive transition zone stagnation (exceeding 100 million years) followed by eventual penetration into the lower mantle. It suggests that some slabs may sink through the mantle much slower than previously believed and may reside intact in the shallow mantle if left undisturbed by subsequent subduction episodes. We postulate other dynamic mechanisms that may be involved and a potential link to Indian Ocean MORB chemistry. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-675725 JF - American Geophysical Union Fall Meeting AU - Simmons, Nathan A AU - Myers, S C AU - Johannesson, G AU - Matzel, E AU - Grand, Steve P AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract DI21B EP - 08 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/1807509389?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+ancient+slab+visible+from+the+transition+zone+to+the+deep+mantle+beneath+the+southern+Indian+Ocean&rft.au=Simmons%2C+Nathan+A%3BMyers%2C+S+C%3BJohannesson%2C+G%3BMatzel%2C+E%3BGrand%2C+Steve+P%3BAnonymous&rft.aulast=Simmons&rft.aufirst=Nathan&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 - Moment rate spectra using 2-D path correction AN - 1807509066; 2016-067047 AB - Estimating moment magnitudes using coda waves has proven to be one of the most robust measurements of the size of an earthquake. In most regions, moderate to large size earthquakes can be easily calibrated with 1-D regional path correction of coda waves at low frequencies (f 0.5 Hz) a larger scattering is observed which leads to higher variation for smaller earthquakes which are only recorded at these higher frequencies. Lawrence Livermore National Laboratory has been improving the number of coda envelope measurements in the Middle East due to significant developments of seismic networks and the recent deployments. We use more than 2000 earthquakes recorded by nearly 60 broad-band stations to investigate the 2-D propagation effects of the coda waves. We have found that coda waves have substantially different propagation properties than the direct waves, and these differences need to be accounted for in the tomographic inversion. The tomographic method separates and simultaneously inverts the Sn-coda and Lg-coda phases for Q over a frequency range of 0.3 to 8 Hz. Initial results of 2-D Q maps are very similar to the direct wave attenuation maps at certain frequencies. JF - American Geophysical Union Fall Meeting AU - Gok, R AU - Pasyanos, M E AU - Matzel, E AU - Walter, W R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51A EP - 2666 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509066?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+rate+spectra+using+2-D+path+correction&rft.au=Gok%2C+R%3BPasyanos%2C+M+E%3BMatzel%2C+E%3BWalter%2C+W+R%3BAnonymous&rft.aulast=Gok&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 - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Iron reduction and carbon dynamics during redox fluctuations in soil slurries from Luquillo CZO (Puerto Rico) AN - 1807508982; 2016-066670 AB - Iron minerals play an important role in the dynamics of nutrients and soil carbon in tropical ecosystems. Because soils often experience fluctuations between oxic and anoxic conditions (redox fluctuations) the pool of reactive Fe(III) phases is under continuous flux. The oxidation of soluble Fe(II) during oxic conditions can generate Fe(III) phase of variable crystallinity with potentially different susceptibility to Fe(III) reduction during subsequent anoxic periods. We hypothesize that the coupled rates of iron reduction and carbon mineralization will respond to differences in the frequency of redox shifts and the length of the oxic and anoxic periods (Tao (oxic) and Tao (anoxic)). To test this, we subjected soil from the upper 15 cm of the Bisley watershed in the Luquillo critical zone observatory (LCZO), Puerto Rico, to five redox fluctuations scenarios. The treatments included either a fixed anoxic period of 6 d with oxic periods of 8, 24, and 72 h (3 treatments); or a fixed anoxic period of 2 d with oxic periods of 8 or 24 h (2 treatments). Results from a preliminary experiment indicated iron reduction rates increased when the oxic period was decreased below 10 h. We are completing analysis of the full dataset from the experiment above and will present Fe(II) concentrations and gas phase concentrations (CO (sub 2) emissions). Results from this experiment will further constrain the type of redox dynamics that influence soil Fe reduction and carbon mineralization. JF - American Geophysical Union Fall Meeting AU - Barcellos, D AU - Silver, W L AU - Pett-Ridge, J AU - Thompson, A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B41F EP - 0503 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/1807508982?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Iron+reduction+and+carbon+dynamics+during+redox+fluctuations+in+soil+slurries+from+Luquillo+CZO+%28Puerto+Rico%29&rft.au=Barcellos%2C+D%3BSilver%2C+W+L%3BPett-Ridge%2C+J%3BThompson%2C+A%3BAnonymous&rft.aulast=Barcellos&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 - The stability of peatland carbon stores to global change; evidence for enhanced methane and carbon dioxide production AN - 1807508701; 2016-066721 AB - Peatlands sequester large stores of carbon in sedimentary sequences that can be meters thick. Peatlands can be separated into two main layers: the acrotelm, which is exposed to the atmosphere and dominated by living plants, and the catotelm, which tends to be anoxic and is where the majority of organic matter is stored. In response to warming climate, to what extent will peatland organic matter be activated to form additional CH (sub 4) and CO (sub 2) relative to current production rates? To predict the answer to this question the SPRUCE (Spruce and Peatland Responses Under Climatic and Environmental Change) project is being conducted in a bog ecosystem in northern Minnesota. The study is designed to improve predictive skill in peat and wetland-methane models by defining quantitative relationships among decomposition indices, microbial communities, and CO (sub 2) and CH (sub 4) production rates. The manipulation is being conducted in a staged approach, and deep warming through the entire nearly equal 2 m peat profile was initiated in June of 2014 at +0, +2.2, +4.5, +6.8 and +9C. Starting in summer 2015, the project will enhance both above and belowground temperature and CO (sub 2) levels. Following months of temperature enhancement there is no evidence of an effect on catotelm peat. In bog pre-treatment, control and treatment plots, microbial respiration and CO (sub 2) and CH (sub 4) production in the deep peat is driven primarily by recent plant production and to date, this trend continues in the catolem following treatment. Methane d13C and fractionation factors are invariant across the treatments, as are gas concentrations at depth. Surface CH (sub 4) emission, however, has shown a positive correlation with peat temperature, and measurements of CH (sub 4) production in incubations across the depth profile suggest that surface peat is more responsive to increases in soil temperature, apparently driving the emission response. Shifts in the composition and metabolic potential of microbial communities are being examined using next generation sequencing, metagenomic, and metatranscriptomic approaches. Prior to heating, microbial communities showed strong vertical stratification correlated to peat decomposition and humification, while little spatial or temporal variation was observed. Peat samples from after 1 year of heating are now being processed and data will soon be available. JF - American Geophysical Union Fall Meeting AU - Chanton, J AU - Wilson, R AU - Tfaily, M M AU - Sebestyen, S D AU - Medvedeff, C AU - McFarlane, K J AU - Kolka, R K AU - Kostka, J E AU - Keller, J AU - Hanson, P J AU - Guilderson, T P AU - de La Cruz, F AU - Cooper, W T AU - Bridgham, S D AU - Barlaz, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B44B EP - 01 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/1807508701?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+stability+of+peatland+carbon+stores+to+global+change%3B+evidence+for+enhanced+methane+and+carbon+dioxide+production&rft.au=Chanton%2C+J%3BWilson%2C+R%3BTfaily%2C+M+M%3BSebestyen%2C+S+D%3BMedvedeff%2C+C%3BMcFarlane%2C+K+J%3BKolka%2C+R+K%3BKostka%2C+J+E%3BKeller%2C+J%3BHanson%2C+P+J%3BGuilderson%2C+T+P%3Bde+La+Cruz%2C+F%3BCooper%2C+W+T%3BBridgham%2C+S+D%3BBarlaz%2C+M%3BAnonymous&rft.aulast=Chanton&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 - Estimating the buoyancy field for Earth's mantle using seismic and mineralogical models AN - 1807508510; 2016-066954 AB - Many geophysical phenomena, such as mantle convection, dynamic topography, geoid undulations, and plate motions, arise as a balance between driving gravitational forces and resisting viscous stresses within the Earth's mantle. A good characterization of the present-day buoyancy field of the mantle would allow for tighter constraints on its viscosity. It is possible to derive an estimate for the present-day buoyancy field of the mantle using seismically-derived global tomographic models together with thermodynamically self-consistent models of mantle mineralogy. However, given the uncertainties affecting both seismic and mineralogical models, different choices can be made, which lead to different estimates. Here we explore some of the possible endmembers, looking at the different buoyancy structure they produce and the different implications they have for the dynamic Earth. JF - American Geophysical Union Fall Meeting AU - Colli, Lorenzo AU - Ghelichkhan, Siavash AU - Chust, Thomas AU - Schuberth, Bernhard S A AU - Simmons, Nathan A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract DI51A EP - 2618 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/1807508510?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Estimating+the+buoyancy+field+for+Earth%27s+mantle+using+seismic+and+mineralogical+models&rft.au=Colli%2C+Lorenzo%3BGhelichkhan%2C+Siavash%3BChust%2C+Thomas%3BSchuberth%2C+Bernhard+S+A%3BSimmons%2C+Nathan+A%3BAnonymous&rft.aulast=Colli&rft.aufirst=Lorenzo&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 - Synthesis of xenon and iron/nickel intermetallic compounds under the thermodynamic conditions of the Earth's core AN - 1807508446; 2016-066904 AB - The lower Xe abundance in Earth's atmosphere, in comparison to other noble gases like Ar and Kr, is one of the most challenging open questions in geosciences [1]. The origin of the so-called "missing Xe paradox" is usually attributed to the inclusion of Xe in the interior of Earth [2]. Although Xe is known to form compounds (e.g. with hydrogen, oxygen), none of them can be related with Earth's interior. Indeed, only a very low amount of Xe can be incorporated in silica at <1 GPa and 500K [3]. On the other hand, experimental attempts have failed to trace possible formation of Fe-Xe compounds up to 155 GPa and bellow 2500K [4]. A very recent theoretical study, suggests that Xe-Ni and Xe-Fe compounds can form at thermodynamic conditions representative of Earth's outer core [5]. Here we explored the possible formation of stable compounds in the Xe-Fe/Ni system at thermodynamic conditions representative of Earth's outer core starting from the following mixtures: a) Xe-Fe, b) Xe-Ni and c) Xe and an Fe/Ni alloy representative of Earth's core (ca 6% Ni). Using in situ synchrotron X-ray diffraction and Raman spectroscopy we report the formation of: a) a XeNi (sub 3) compound, in the form of a CrNi (sub 3) -type FCC solid solution, above 150 GPa and 1500 K, b) a Xe(Fe/Ni) (sub 3) compound, tentatively characterized as an orthorhombic NbPd (sub 3) -type solid solution, above 190 GPa and 2000 K and c) a still not completely characterized XeFex compound above 180 GPa and 2000 K. This work provides a plausible explanation of the "missing Xe paradox", and underscores the importance of understanding the novel rules of high-pressure chemistry for an improved understanding of the structure and chemistry of the Earth's core. [1] E. Anders, E. and T. Owen, Science 198, 453 (1977). [2] Caldwell, W. A. et al., Science 277, 930 (1997). [3] C. Sanloup et al.,Science 310, 1174(2005). [4] D. Nishio-Hamane et al., Geophys. Res. Lett. 37, L04302 (2010). [5] L. Zhu et al., Nature chemistry 6, 664 (2014). JF - American Geophysical Union Fall Meeting AU - Stavrou, Elissaios AU - Zaug, Jospeh M AU - Crowhurst, Jonathan AU - Lobanov, Sergey AU - Goncharov, Alexander F AU - Prakapenka, Vitali AU - Prescher, Clemens AU - Yao, Yansun AU - Liu, Hhanyu AU - Dai, Zurong AU - Oleynik, Ivan AU - Steele, Brad AU - Cong, Kien Nguyen AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract DI42A EP - 08 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/1807508446?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Synthesis+of+xenon+and+iron%2Fnickel+intermetallic+compounds+under+the+thermodynamic+conditions+of+the+Earth%27s+core&rft.au=Stavrou%2C+Elissaios%3BZaug%2C+Jospeh+M%3BCrowhurst%2C+Jonathan%3BLobanov%2C+Sergey%3BGoncharov%2C+Alexander+F%3BPrakapenka%2C+Vitali%3BPrescher%2C+Clemens%3BYao%2C+Yansun%3BLiu%2C+Hhanyu%3BDai%2C+Zurong%3BOleynik%2C+Ivan%3BSteele%2C+Brad%3BCong%2C+Kien+Nguyen%3BAnonymous&rft.aulast=Stavrou&rft.aufirst=Elissaios&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 - Geodynamic constraints on deep-mantle buoyancy; implications for thermochemical structure of LLSVP and large-scale upwellings under the Pacific Ocean AN - 1807508125; 2016-066877 AB - Convection-related data constrain lower-mantle density anomalies that contribute to mantle convective flow. These include global gravity and topography anomalies, plate motions and excess ellipticity of the core-mantle boundary (CMB). Each datum possesses differing wavelength and depth dependent resolution of heterogeneity and thus the strongest constraints on density anomalies are obtained by jointly inverting all data in combination. The joint-inversions employ viscous response functions (i.e. geodynamic kernels) for a flowing mantle. Non-uniqueness is greatly reduced by including seismic and mineral physics data into the joint inversions. We present the results of inversions where seismic and geodynamic data are singly and jointly inverted to map density anomalies. Employing mineral physical data we estimate thermal and compositional contributions to density anomalies. We evaluate the extent to which "Large Low Shear Velocity Provinces" (LLSVP) are anomalous and we determine their impact on the global pattern of convective flow. The inversions yield consistent maps of lower-mantle flow (see figure) that are dominated by two large upwellings, under the Western Pacific (next to the Caroline microplate) and Eastern Pacific (under the East Pacific Rise). These hot upwellings effectively delimit the margins of the Pacific LLSVP, suggesting intrinsic negative buoyancy within this structure impedes large-scale upwellings in the mantle above. These two upwellings do not resemble classical mantle "plumes" found in simple isoviscous and isochemical convection models but their contribution to mass and heat transport across the lower mantle is significant and thus behave similarly to plumes. The large scale of these upwellings may be understood in terms of the high viscosity in the lower mantle, inferred from geodynamic constraints on mantle rheology. Very-long time convection simulations initiated with present-day structure inferred from these inversions show the two Pacific upwellings possess remarkable geographic fixity and longevity extending over several hundred million years, again a consequence of the high viscosity in the lower mantle. These upwellings are fed by large heat flux across the CMB (from 12 to 20 TW) and should play a major role in the thermal evolution of the mantle. JF - American Geophysical Union Fall Meeting AU - Forte, Alessandro M AU - Glisovic, P AU - Grand, Steve P AU - Lu, Chang AU - Simmons, Nathan A AU - Rowley, David B AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract DI41A EP - 2589 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/1807508125?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geodynamic+constraints+on+deep-mantle+buoyancy%3B+implications+for+thermochemical+structure+of+LLSVP+and+large-scale+upwellings+under+the+Pacific+Ocean&rft.au=Forte%2C+Alessandro+M%3BGlisovic%2C+P%3BGrand%2C+Steve+P%3BLu%2C+Chang%3BSimmons%2C+Nathan+A%3BRowley%2C+David+B%3BAnonymous&rft.aulast=Forte&rft.aufirst=Alessandro&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 - Identifying components of groundwater flow, flux, and storage in Tuolumne Meadows, Yosemite, California AN - 1807508003; 2016-064454 AB - High elevation meadows in the Sierra Nevada of California, USA represent mixing zones between surface water and groundwater. Quantifying the exchange between stream water and groundwater, and the residence time of water stored in meadow sediments will allow examination of the possible buffer effect that groundwater has on meadows and streams. This in turn has implications for the resilience of the ecosystem as well as the downstream communities that are dependent upon runoff for water supply. Stream flow was measured and water samples were collected along a 5 km reach of the Tuolumne River and adjacent wells during both spring runoff and baseflow. Water samples were analyzed for concentrations of dissolved noble gases and anions, sulfur-35, tritium and radon to study surface water-groundwater interactions and residence times. Although lower than average because of the ongoing drought in California, discharge in early July 2015 was about 35 times that measured during the previous fall. During baseflow, a small component of fracture flow (2%) is identified using dissolved helium. Radon, anions and stream discharge identify reaches of groundwater discharge. Anions show a steady increase in the groundwater component over the western portion of the meadow during baseflow, and over 50% of stream water is exchanged with meadow groundwater, without a net gain or loss of stream flow. Sulfur-35 and tritium results indicated that groundwater contributing to stream flow has recharged within the previous two years. With the current drought, estimated as the most severe in 1200 years, accurate estimations of water availability are becoming increasingly important to water resource managers. JF - American Geophysical Union Fall Meeting AU - Vialpando, M, III AU - Lowry, C AU - Visser, A AU - Moran, Jean E AU - Esser, B K AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C33A EP - 0798 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508003?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Identifying+components+of+groundwater+flow%2C+flux%2C+and+storage+in+Tuolumne+Meadows%2C+Yosemite%2C+California&rft.au=Vialpando%2C+M%2C+III%3BLowry%2C+C%3BVisser%2C+A%3BMoran%2C+Jean+E%3BEsser%2C+B+K%3BAnonymous&rft.aulast=Vialpando&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 - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Effect of silicon alloying on the structure of exoplanetary cores AN - 1807507348; 2016-066907 AB - The composition of cores of terrestrial planets are expected to be broadly similar to that of Earth in that they are comprised of a Fe-Ni alloy with variable amounts of light elements such as O, Si, C, S, and H. With the increasing number of discoveries of Super-Earths (rocky planets many times the mass of our own), the properties of terrestrial phases at ultrahigh pressures are required to understand and interpret the variability of large-scale exoplanet observations. The properties of the cores of these bodies are important for understanding the bulk chemistry, thermal evolution, magnetic fields, and, ultimately, habitability of a planet. Recent diamond anvil cell studies interrogating the structure of iron generally agree that Fe should be hcp at core pressures and temperatures, although other structures have been proposed. At higher pressures and with the addition of light elements, the structure is less understood. The addition of large amounts of Si, for example, stabilizes the cubic B2 structure with respect to hcp at outer core pressures. Our goal in this study is to explore the effect of Si-alloying at inner core and exoplanetary-core pressures. Dynamic compression experiments were carried out at the Omega Laser at the Laboratory for Laser Energetics, University of Rochester. High pressures were achieved by focusing laser drives onto target packages containing Fe-Si alloys. Pressures within the sample were determined by monitoring the velocity history at the sample/window interface. Quasi-monochromatic X-rays, timed with maximum compression of the Fe-alloy sample, were generated via laser irradiation of iron or germanium foils arranged in a backlighter configuration and collected on image plates lining the inner walls of a box attached to the target package. In this presentation we will report on the effect of Si-alloying on the structure and density of Fe over the pressure range 100-1000 GPa. We find that while Fe with 7 wt.% Si remains in the hcp structure, Fe with 15 wt.% Si is cubic to very high pressures. We present our experimental findings and discuss the implications for exoplanet interiors. JF - American Geophysical Union Fall Meeting AU - Wicks, June K AU - Smith, Ryamond AU - Coppari, Frederica AU - Kraus, Richard G AU - Newman, Matthew AU - Duffy, Thomas S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract DI43A EP - 2603 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/1807507348?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Effect+of+silicon+alloying+on+the+structure+of+exoplanetary+cores&rft.au=Wicks%2C+June+K%3BSmith%2C+Ryamond%3BCoppari%2C+Frederica%3BKraus%2C+Richard+G%3BNewman%2C+Matthew%3BDuffy%2C+Thomas+S%3BAnonymous&rft.aulast=Wicks&rft.aufirst=June&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 - Who's on first? Part II, Bacterial and fungal colonization of fresh soil minerals AN - 1807504924; 2016-064449 AB - Soil organic matter (SOM) stabilization by soil minerals is an important mechanism influencing soil C cycling. Microbes make up only a few percent of total SOM, but have a disproportionate impact on SOM cycling. Their direct interactions with soil minerals, however, are not well characterized. We studied colonization of fresh minerals by soil microbes in an Avena barbata (wild oat) California grassland soil microcosm. Examining quartz, ferrihydrite, kaolinite, and the heavy fraction of the native soil, we asked: (1) Do different minerals select for different communities, or do random processes drive the colonization of fresh minerals? (2) What factors influence which taxa colonize fresh minerals? After incubating mesh bags (<18 mu m) of minerals buried next to actively growing plant roots for 2 months, we used high-throughput sequencing of 16S and ITS2 genes to characterize the microbial communities colonizing the minerals. We found significant differences between the microbial community composition of different minerals and soil for both bacteria and fungi. We found a higher relative abundance of arbuscular mycorrhial fungi with ferrihydrite and quartz, and nanoscale secondary ion mass spectrometry (NanoSIMS) imaging of these minerals suggests that some fungal hyphae are moving C directly from roots to mineral surfaces. The enriched presence of both nematode-associated fungi (Pochonia sp.) and bacteria (Candidatus Xiphinematobacter) in the minerals suggests that these minerals may be a habitat for nematodes. Bacteria of the family Chitinophagaceae and genus Janthinobacterium were significantly enriched on both ferrihydrite and quartz minerals, both of which may interact with colonizing fungi. These findings suggest that: (1) Microbial colonization of fresh minerals is not a fully passive or neutral process. (2) Mineral exploration by plant-associated fungi and soil fauna transport may be factors in determining the initial colonization of minerals and subsequent C protection. JF - American Geophysical Union Fall Meeting AU - Whitman, T AU - Neurath, R AU - Zhang, P AU - Yuan, T AU - Weber, P K AU - Zhou, J AU - Pett-Ridge, J AU - Firestone, M K AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B41F EP - 0490 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/1807504924?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Who%27s+on+first%3F+Part+II%2C+Bacterial+and+fungal+colonization+of+fresh+soil+minerals&rft.au=Whitman%2C+T%3BNeurath%2C+R%3BZhang%2C+P%3BYuan%2C+T%3BWeber%2C+P+K%3BZhou%2C+J%3BPett-Ridge%2C+J%3BFirestone%2C+M+K%3BAnonymous&rft.aulast=Whitman&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 - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - In situ X-ray diffraction of forsterite under shock compression to 52 GPa; time resolved observation of changes in crystal structure and phase AN - 1800397007; 2016-058049 AB - The Earth's mantle is composed primarily of ferromagnesian silicates, of which Forsterite (Fo) is the magnesium-rich end member of the dominant upper mantle phase, olivine. Fo is thought to undergo a chemical decomposition associated with a structural phase transition when dynamically loaded to 40-71 GPa, but previous inferences about such decomposition have been based only on pressure-density data with no direct phase identification. To obtain direct data on the phase evolution of shocked Fo, synthetic single crystal samples of Mg (sub 2) SiO (sub 4) Fo were loaded to pressures of 52 GPa using a two stage light gas gun. X-ray diffraction (XRD) patterns were collected on the static and the loaded samples in situ using a single pulse Mo Kalpha anode to provide a 17 keV X-ray source. X-ray polycapillary optics were used to couple the source to the sample. Clear Laue spots were observed in the static images, while the dynamic images show the appearance of new spots at early times and powder-like rings at late times. The angles of the dynamically driven spots and rings overlap with each other and indicate the change in phase of forsterite under pressure through a process that begins with the formation of single crystals and ends with polycrystalline material. Efforts are underway to identify the high-pressure phases from among the library of dense magnesium silicates, and further experiments covering a larger pressure range will be completed shortly. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Akin, Minta C AU - Maddox, Brian AU - Teruya, Alan AU - Asimow, Paul D AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR23B EP - 2662 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/1800397007?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+X-ray+diffraction+of+forsterite+under+shock+compression+to+52+GPa%3B+time+resolved+observation+of+changes+in+crystal+structure+and+phase&rft.au=Akin%2C+Minta+C%3BMaddox%2C+Brian%3BTeruya%2C+Alan%3BAsimow%2C+Paul+D%3BAnonymous&rft.aulast=Akin&rft.aufirst=Minta&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 - High temperature equation of state of enstatite and forsterite; implications for thermal origins and evolution AN - 1800396959; 2016-058009 AB - The thermal history of terrestrial planets depends upon the melt boundary as it represents the largest rheological transition a material can undergo. This change in rheological behavior with solidification corresponds to a dramatic change in the thermal and chemical transport properties. Because of this dramatic change in thermal transport, recent work by Stixrude et al. suggests that the silicate melt curve sets the thermal profile within super-Earths during their early thermal evolution. Here we present recent decaying shock wave experiments studying both enstatite and forsterite. The continuously measured shock pressure and temperature in these studies ranged from 8 to 1.5 Mbar and 20,000-4,000 K, respectively. We find a point on the MgSiO (sub 3) liquidus at 6800 K and 285 GPa, which is nearly a factor of two higher pressure than previously measured and provides a strong constraint on the temperature profile within super-Earths. Our shock temperature measurements on forsterite and enstatite provide much needed equation of state information to the planetary impact modeling community since the shock temperature data can be used to constrain the initial entropy state of a growing planet. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Fratanduono, Dayne AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR21D EP - 03 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/1800396959?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+temperature+equation+of+state+of+enstatite+and+forsterite%3B+implications+for+thermal+origins+and+evolution&rft.au=Fratanduono%2C+Dayne%3BAnonymous&rft.aulast=Fratanduono&rft.aufirst=Dayne&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 - Recreating the deep interior conditions of gas giants in the laboratory; phase separation in hydrogen-helium mixtures at Jovian planet conditions AN - 1800395474; 2016-058014 AB - Several new techniques are being developed and used to benchmark equation of state and transport theories implicit to gas giant planet evolution models. We will discuss two particular experiment campaigns; one set of experiments exploring the nature of H and He mixtures in the deep interiors of Jupiter and Saturn, and a second set of experiments exploring the nature of matter at multi-gigabar pressures. Whether or not H-He mixtures phase separate in Jovian planets is important to our understanding of the structure and evolution of Jupiter and Saturn. Also integral to such planet models, as well as mechanisms for H-He phase separation, are the insulating-to-conducting and the molecular-to-atomic-hydrogen transitions in the H-He mixture. Coupling static and dynamic compression techniques has allowed us to make the first thermodynamic and transport measurements of H-He mixtures at deep Jovian planet conditions. These data provide evidence that the H-He fluid demixes at the high pressures and temperatures expected to exist deep inside Saturn and Jupiter. The second set of experiments explored how matter behaves at 10's of billions of atmospheres pressure, well beyond the atomic unit of pressure required to distort core electron orbitals of mid-Z atoms. To achieve these conditions in the laboratory a new series of convergent shock techniques was developed. We present the first temperature-density and pressure data for this regime. JF - American Geophysical Union Fall Meeting AU - Collins, Gilbert Wilson AU - Loubeyre, Paul AU - Brygoo, Stephanie AU - Millot, M A AU - Rygg, J R AU - Celliers, P M AU - Eggert, J AU - Boehly, T R AU - Jeanloz, R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR21D 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/1800395474?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Recreating+the+deep+interior+conditions+of+gas+giants+in+the+laboratory%3B+phase+separation+in+hydrogen-helium+mixtures+at+Jovian+planet+conditions&rft.au=Collins%2C+Gilbert+Wilson%3BLoubeyre%2C+Paul%3BBrygoo%2C+Stephanie%3BMillot%2C+M+A%3BRygg%2C+J+R%3BCelliers%2C+P+M%3BEggert%2C+J%3BBoehly%2C+T+R%3BJeanloz%2C+R%3BAnonymous&rft.aulast=Collins&rft.aufirst=Gilbert&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 - Holocene fluctuations of North Ice Cap, a proxy for climate conditions along the northwestern margin of the Greenland ice sheet AN - 1800394738; 2016-058353 AB - North Ice Cap ( approximately 76.9 degrees N, 68 degrees W, summit elevation 1322 m asl), a small, independent ice cap in northwestern Greenland, is located within approximately 25 km of the Greenland Ice Sheet margin and Harald Molkte Brae outlet glacier. We present geochronological, geomorphic and sedimentological data constraining the Holocene extents of North Ice Cap and suggest that its past fluctuations can be used as a proxy for climate conditions along the northwestern margin of the Greenland Ice Sheet. Prior work by Goldthwait (1960) used glacial geomorphology and radiocarbon ages of subfossil plants emerging along shear planes in the ice cap margin to suggest that that North Ice Cap was not present during the early Holocene and nucleated in the middle to late Holocene time, with the onset of colder conditions. Subfossil plants emerging at shear planes in the North Ice Cap margin yield radiocarbon ages of approximately 4.8-5.9 cal kyr BP (Goldthwait, 1960) and approximately AD 1000-1350 (950-600 cal yr BP), indicating times when the ice cap was smaller than at present. In situ subfossil plants exposed by recent ice cap retreat date to approximately AD 1500-1840 (450-110 cal yr BP) and indicate small fluctuations of the ice cap margin. (super 10) Be ages of an unweathered, lichen-free drift <100 m from the present North Ice Cap margin range from approximately 500 to 8000 yrs ago. We suggest that the drift was deposited during the last approximately 500 yrs and that the older (super 10) Be ages are influenced by (super 10) Be inherited from a prior period of exposure. We also infer ice cap fluctuations using geochemical data from a Holocene-long sediment core from Deltaso, a downstream lake that currently receives meltwater from North Ice Cap. The recent recession of the North Ice Cap margin influenced a catastrophic drainage of a large proglacial lake, Sondre Sneso, that our field team documented in August 2012. To our knowledge, this is the first significant lowering of Sondre Sneso in historical time. JF - American Geophysical Union Fall Meeting AU - Kelly, Meredith A AU - Osterberg, Erich C AU - Lasher, G Everett AU - Farnsworth, Lauren B AU - Howley, Jennifer A AU - Axford, Yarrow AU - Zimmerman, Susan R H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract PP33A EP - 2284 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/1800394738?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Holocene+fluctuations+of+North+Ice+Cap%2C+a+proxy+for+climate+conditions+along+the+northwestern+margin+of+the+Greenland+ice+sheet&rft.au=Kelly%2C+Meredith+A%3BOsterberg%2C+Erich+C%3BLasher%2C+G+Everett%3BFarnsworth%2C+Lauren+B%3BHowley%2C+Jennifer+A%3BAxford%2C+Yarrow%3BZimmerman%2C+Susan+R+H%3BAnonymous&rft.aulast=Kelly&rft.aufirst=Meredith&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 - How unique is any given seismogram? Exploring correlation methods to identify explosions AN - 1797540133; 2016-050983 AB - As with conventional wisdom about snowflakes, we would expect it unlikely that any two broadband seismograms would ever be exactly identical. However depending upon the resolution of our comparison metric, we do expect, and often find, bandpassed seismograms that correlate to very high levels (>0.99). In fact regional (e.g. Schaff and Richards, 2011) and global investigations (e.g. Dodge and Walter, 2015) find large numbers of highly correlated seismograms. Decreasing computational costs are increasing the tremendous potential for correlation in lowering detection, location and identification thresholds for explosion monitoring (e.g. Schaff et al., 2012, Gibbons and Ringdal, 2012; Zhang and Wen, 2015). We have shown in the case of Source Physics Experiment (SPE) chemical explosions, templates at local and near regional stations can detect, locate and identify very small explosions, which might be applied to monitoring active test sites (Ford and Walter, 2015). In terms of elastic theory, seismograms are the convolution between source and Green function terms. Thus high correlation implies similar sources, closely located. How do we quantify this physically? For example it is well known that as the template event and target events are increasingly separated spatially, their correlation diminishes, as the difference in the Green function between the two events grows larger. This is related to the event separation in terms of wavelength, the heterogeneity of the Earth structure, and the time-bandwidth of the correlation parameters used, but this has not been well quantified. We are using the historic dataset of nuclear explosions in southern Nevada to explore empirically where and how well these events correlate as a function of location, depth, size, time-bandwidth and other parameters. A goal is to develop more meaningful and physical metrics that go beyond the correlation coefficient and can be applied to explosion monitoring problems, particularly event identification. JF - American Geophysical Union Fall Meeting AU - Walter, W R AU - Dodge, D A AU - Ford, S R AU - Pyle, M L AU - Hauk, T F AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51F EP - 07 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797540133?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=How+unique+is+any+given+seismogram%3F+Exploring+correlation+methods+to+identify+explosions&rft.au=Walter%2C+W+R%3BDodge%2C+D+A%3BFord%2C+S+R%3BPyle%2C+M+L%3BHauk%2C+T+F%3BAnonymous&rft.aulast=Walter&rft.aufirst=W&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 - Improved in-water explosion detection by hydrophone triads and T-phase stations AN - 1797539809; 2016-050979 AB - We compare the standard detection scheme employed for hydroacoustic data with an array power detector. The new detection approach offers marginal improvement in signal-to-noise ratio due to the small number of elements, but improves performance for small signals that sit at the threshold of single-station detection. We test the new scheme with a ground-truth dataset from a marine seismic experiment off the coast of Japan and find three times more detections of the small explosions used in the experiment for a hydroacoustic array off Juan Fernandez Island at a distance of nearly 16300 km. We also report detections at several T-phase stations in the Pacific, including Socorro Island at a distance of nearly 10500 km. We plan to analyze features of these detections with the aim of improving in-water explosion detection at T-phase stations. Prepared by LLNL under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Ford, S R AU - Hauk, T F AU - Dodge, D A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51F 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/1797539809?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Improved+in-water+explosion+detection+by+hydrophone+triads+and+T-phase+stations&rft.au=Ford%2C+S+R%3BHauk%2C+T+F%3BDodge%2C+D+A%3BAnonymous&rft.aulast=Ford&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 - 2016-06-17 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 - The survivability of phyllosilicates and carbonates impacting Stardust Al foils; facilitating the search for cometary water AN - 1797538426; 2016-053152 AB - Comet 81P/Wild 2 samples returned by NASA's Stardust mission provide an unequalled opportunity to study the contents of, and hence conditions and processes operating on, comets. They can potentially validate contentious interpretations of cometary infrared spectra and in situ mass spectrometry data: specifically the identification of phyllosilicates and carbonates. However, Wild 2 dust was collected via impact into capture media at approximately 6 km s (super -1) , leading to uncertainty as to whether these minerals were captured intact, and, if subjected to alteration, whether they remain recognizable. We simulated Stardust Al foil capture conditions using a two-stage light-gas gun, and directly compared transmission electron microscope analyses of pre- and postimpact samples to investigate survivability of lizardite and cronstedtite (phyllosilicates) and calcite (carbonate). We find the phyllosilicates do not survive impact as intact crystalline materials but as moderately to highly vesiculated amorphous residues lining resultant impact craters, whose bulk cation to Si ratios remain close to that of the impacting grain. Closer inspection reveals variation in these elements on a submicron scale, where impact-induced melting accompanied by reducing conditions (due to the production of oxygen scavenging molten Al from the target foils) has resulted in the production of native silicon and Fe- and Fe-Si-rich phases. In contrast, large areas of crystalline calcite are preserved within the calcite residue, with smaller regions of vesiculated, Al-bearing calcic glass. Unambiguous identification of calcite impactors on Stardust Al foil is therefore possible, while phyllosilicate impactors may be inferred from vesiculated residues with appropriate bulk cation to Si ratios. Finally, we demonstrate that the characteristic textures and elemental distributions identifying phyllosilicates and carbonates by transmission electron microscopy can also be observed by state-of-the-art scanning electron microscopy providing rapid, nondestructive initial mineral identifications in Stardust residues. Abstract Copyright The Meteoritical Society, 2015. JF - Meteoritics & Planetary Science AU - Wozniakiewicz, Penelope J AU - Ishii, Hope A AU - Kearsley, Anton T AU - Bradley, John P AU - Price, Mark C AU - Burchell, Mark J AU - Teslich, Nick AU - Cole, Mike J Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 2003 EP - 2023 PB - Meteoritical Society, Fayetteville, AR VL - 50 IS - 12 SN - 1086-9379, 1086-9379 KW - silicates KW - cratering KW - impact features KW - simulation KW - infrared spectra KW - laboratory studies KW - cronstedtite KW - melting KW - serpentine group KW - aluminum foil KW - Wild 2 Comet KW - light-gas guns KW - spectra KW - water KW - lizardite KW - experimental studies KW - Stardust Mission KW - electron microscopy data KW - TEM data KW - calcite KW - comets KW - sheet silicates KW - impact craters KW - cometary dust KW - carbonates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538426?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=The+survivability+of+phyllosilicates+and+carbonates+impacting+Stardust+Al+foils%3B+facilitating+the+search+for+cometary+water&rft.au=Wozniakiewicz%2C+Penelope+J%3BIshii%2C+Hope+A%3BKearsley%2C+Anton+T%3BBradley%2C+John+P%3BPrice%2C+Mark+C%3BBurchell%2C+Mark+J%3BTeslich%2C+Nick%3BCole%2C+Mike+J&rft.aulast=Wozniakiewicz&rft.aufirst=Penelope&rft.date=2015-12-01&rft.volume=50&rft.issue=12&rft.spage=2003&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12568 L2 - http://cavern.uark.edu/~meteor/ 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 - 87 N1 - PubXState - AR N1 - Document feature - illus. N1 - Last updated - 2016-08-18 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aluminum foil; calcite; carbonates; cometary dust; comets; cratering; cronstedtite; electron microscopy data; experimental studies; impact craters; impact features; infrared spectra; laboratory studies; light-gas guns; lizardite; melting; serpentine group; sheet silicates; silicates; simulation; spectra; Stardust Mission; TEM data; water; Wild 2 Comet DO - http://dx.doi.org/10.1111/maps.12568 ER - TY - JOUR T1 - Climatic and societal causes for abrupt environmental change in the Mediterranean during the Common Era AN - 1797538412; 2016-053412 AB - We compare climatic and societal causes for abrupt environmental change for the last 2000 years in the Rieti Basin, central Italy using high-resolution sedimentary paleoenvironmental proxies, historical documents, and annually resolved independent climate reconstructions of temperature and precipitation. Pollen zones, identified from temporally constrained cluster analysis, coincide with historic periods developed from well-established ceramic sequences corresponding to the Roman Imperial through Late Antique (1 to 600 CE) Early Medieval (600 to 875 CE), Medieval through Late Medieval (875 to 1400 CE), Renaissance and Modern (1400 to 1725 CE), and Contemporary periods (1725 CE to present). Non-metric dimensional scaling (NMDS) ordination showed that each temporal period occupied a unique ecologic space suggesting that a new landscape was created during each successive historic period. During Roman time, between 1 and 500 CE, a modest decline in forest coincides with a positive phase of the North Atlantic Oscillation (NAO) and drier climate; however mesophyllous forest is preserved. Steep decline in forest cover between 850 and 950 CE coincides with positive temperature anomalies in Europe and a positive NAO. Although this would seem to suggest climate as a cause, temperature and precipitation changes are modest and the magnitude and rapidity of the vegetation change suggests climate played a small role. Archaeological evidence from across Europe identifies socioeconomic factors that produced forest clearing. In contrast, cooler temperatures and a negative NAO (increased ppt) appears to have been a catalyst for land abandonment and forest recovery in the 13th to 14th centuries. The NAO produces opposite effects on societies in the eastern and western Mediterranean with the negative phase in 1400 CE leading to cool wet climate and land abandonment in central Italy but an abrupt shift to drier conditions and change from sedentary village life to nomadism in Syria. JF - American Geophysical Union Fall Meeting AU - Mensing, S A AU - Tunno, Irene AU - Sagnotti, Leonardo AU - Florindo, Fabio AU - Noble, P J AU - Archer, Claire AU - Zimmerman, S R H AU - Pavon-Carrasco, F Javier AU - Cifnani, G AU - Passigli, Susanna AU - Piovesan, G AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract PP51A EP - 2266 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/1797538412?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Climatic+and+societal+causes+for+abrupt+environmental+change+in+the+Mediterranean+during+the+Common+Era&rft.au=Mensing%2C+S+A%3BTunno%2C+Irene%3BSagnotti%2C+Leonardo%3BFlorindo%2C+Fabio%3BNoble%2C+P+J%3BArcher%2C+Claire%3BZimmerman%2C+S+R+H%3BPavon-Carrasco%2C+F+Javier%3BCifnani%2C+G%3BPassigli%2C+Susanna%3BPiovesan%2C+G%3BAnonymous&rft.aulast=Mensing&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 - 2016-06-17 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 - Numerical investigation of the seismo-acoustic responses of the source physics experiment underground explosions AN - 1797537547; 2016-050982 AB - We have performed three-dimensional high resolution simulations of underground explosions conducted recently in jointed rock outcrop as part of the Source Physics Experiment (SPE) being conducted at the Nevada National Security Site (NNSS). The main goal of the current study is to investigate the effects of the structural and geomechanical properties on the spall phenomena due to underground explosions and its subsequent effect on the seismo-acoustic signature at far distances. Two parametric studies have been undertaken to assess the impact of different 1) conceptual geological models including a single layer and two layers model, with and without joints and with and without varying geomechanical properties, and 2) depth of bursts of the explosions and explosion yields. Through these investigations we have explored not only the near-field response of the explosions but also the far-field responses of the seismic and the acoustic signatures. The near-field simulations were conducted using the Eulerian and Lagrangian codes, GEODYN and GEODYN -L, respectively, while the far-field seismic simulations were conducted using the elastic wave propagation code, WPP, and the acoustic response using the Kirchhoff-Helmholtz-Rayleigh time-dependent approximation code, KHR. Though a series of simulations, we have recorded the velocity field histories a) at the ground surface on an acoustic-source-patch for the acoustic simulations, and 2) on a seismic-source-box for the seismic simulations. We first analyzed the SPE3 and SPE4-prime experimental data and simulated results, and then simulated SPE5, SPE6/7 to anticipate their seismo-acoustic responses given conditions of uncertainties. SPE experiments were conducted in a granitic formation; we have extended the parametric study to include other geological settings such dolomite and alluvial formations. These parametric studies enabled us 1) investigating the geotechnical and geophysical key parameters that impact the seismo-acoustic responses of underground explosions and 2) deciphering and ranking through a global sensitivity analysis the most important key parameters to be characterized on site in order to minimize uncertainties in prediction and discrimination. LLNL-ABS-675328-DRAFT. JF - American Geophysical Union Fall Meeting AU - Antoun, T AU - Ezzedine, S M AU - Vorobiev, O AU - Glenn, L A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51F EP - 06 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797537547?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+the+seismo-acoustic+responses+of+the+source+physics+experiment+underground+explosions&rft.au=Antoun%2C+T%3BEzzedine%2C+S+M%3BVorobiev%2C+O%3BGlenn%2C+L+A%3BAnonymous&rft.aulast=Antoun&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 - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Calibrated multiple event relocations of the central and eastern United States AN - 1797537506; 2016-050969 AB - Earthquake locations are a first-order observable which form the basis of a wide range of seismic analyses. Currently, the ANSS catalog primarily contains published single-event earthquake locations that rely on assumed 1D velocity models. Increasing the accuracy of cataloged earthquake hypocenter locations and origin times and constraining their associated errors can improve our understanding of Earth structure and have a fundamental impact on subsequent seismic studies. Multiple-event relocation algorithms often increase the precision of relative earthquake hypocenters but are hindered by their limited ability to provide realistic location uncertainties for individual earthquakes. Recently, a Bayesian approach to the multiple event relocation problem has proven to have many benefits including the ability to: (1) handle large data sets; (2) easily incorporate a priori hypocenter information; (3) model phase assignment errors; and, (4) correct for errors in the assumed travel time model. In this study we employ bayseloc [Myers et al., 2007, 2009] to relocate earthquakes in the Central and Eastern United States from 1964-present. We relocate approximately 11,000 earthquakes with a dataset of approximately 439,000 arrival time observations. Our dataset includes arrival-time observations from the ANSS catalog supplemented with arrival-time data from the Reviewed ISC Bulletin (prior to 1981), targeted local studies, and arrival-time data from the TA Array. One significant benefit of the bayesloc algorithm is its ability to incorporate a priori constraints on the probability distributions of specific earthquake locations parameters. To constrain the inversion, we use high-quality calibrated earthquake locations from local studies, including studies from: Raton Basin, Colorado; Mineral, Virginia; Guy, Arkansas; Cheneville, Quebec; Oklahoma; and Mt. Carmel, Illinois. We also add depth constraints to 232 earthquakes from regional moment tensors. Finally, we add constraints from four historic (1964-1973) ground truth events from a verification database. We (1) evaluate our ability to improve our location estimations, (2) use improved locations to evaluate Earth structure in seismically active regions, and (3) examine improvements to the estimated locations of historic large magnitude earthquakes. JF - American Geophysical Union Fall Meeting AU - Yeck, W L AU - Benz, H AU - McNamara, D E AU - Bergman, E AU - Herrmann, R B AU - Myers, S C AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51E 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/1797537506?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Calibrated+multiple+event+relocations+of+the+central+and+eastern+United+States&rft.au=Yeck%2C+W+L%3BBenz%2C+H%3BMcNamara%2C+D+E%3BBergman%2C+E%3BHerrmann%2C+R+B%3BMyers%2C+S+C%3BAnonymous&rft.aulast=Yeck&rft.aufirst=W&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 - Ba/Ca ratios in North Pacific bamboo corals record changes in intermediate water biogeochemistry AN - 1797534937; 2016-050714 AB - Trace elemental ratios preserved in the skeleton of bamboo corals, which live for hundreds of years at >500m depth, have been utilized as archives of deep-ocean conditions. However, it was previously unclear whether trace element data from these corals were internally reproducible and could therefore be used as reliable climate proxies. This study tests the internal reproducibility of Ba/Ca in the calcite of nine bamboo corals to further develop a new proxy for dissolved Ba in seawater (BaSW). Trace element LA-ICP-MS data were collected along three replicate radii of varying lengths of the calcitic internodes of well-dated corals collected live from the Gulf of Alaska (720m and 643m) and the California Margin (870m, 1012m, 1295m, 1500m, 1521m, 1954m, and 2054m; samples from 1295-1521m are not yet dated). Data were aligned using visible bands measured with a petrographic microscope to account for irregular growth. Ba/Ca data filtered with a 50mu m (1.5-2 year) moving average were reproducible within each coral to 2.9 + or - 2.1% (n=3 radii/coral, 9 corals), suggesting that regional geochemical signals are recorded as reproducible Ba/Ca signals on >annual timescales. Coral Ba/Ca presents an excellent proxy for BaSW, which has been found to be correlated with refractory nutrients (e.g. silicate) and oxygen minima. Increasing BaSW with depth and increased variability near 1000m suggests that BaSW is not constant with depth or with time. Several factors, including barite saturation state, particulate organic carbon (POC) remineralization rate, and particle sinking time, may be involved in the observed changes in BaSW. Further examination of such mechanisms could provide new insights into modern changes in deep-sea biogeochemistry. JF - American Geophysical Union Fall Meeting AU - Serrato Marks, G AU - LaVigne, M AU - Hill, T M AU - Sauthoff, W AU - Guilderson, T P AU - Roark, E B AU - Dunbar, R B AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B22B EP - 02 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/1797534937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Ba%2FCa+ratios+in+North+Pacific+bamboo+corals+record+changes+in+intermediate+water+biogeochemistry&rft.au=Serrato+Marks%2C+G%3BLaVigne%2C+M%3BHill%2C+T+M%3BSauthoff%2C+W%3BGuilderson%2C+T+P%3BRoark%2C+E+B%3BDunbar%2C+R+B%3BAnonymous&rft.aulast=Serrato+Marks&rft.aufirst=G&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 - Production of excess CO (sub 2) relative to methane in peatlands; a new H (sub 2) sink AN - 1797532503; 2016-053200 AB - Methane is generated as the end product of anaerobic organic matter degradation following a series of reaction pathways including fermentation and syntrophy. Along with acetate and CO2, syntrophic reactions generate H2 and are only thermodynamically feasible when coupled to an exothermic reaction that consumes H2. The usual model of organic matter degradation in peatlands has assumed that methanogenesis is that exothermic H2-consuming reaction. If correct, this paradigm should ultimately result in equimolar production of CO2 and methane from the degradation of the model organic compound cellulose: i.e. C6H12O6 a 3CO2 + 3CH4. However, dissolved gas measurement and modeling results from field and incubation experiments spanning peatlands across the northern hemisphere have failed to demonstrate equimolar production of CO2 and methane. Instead, in a flagrant violation of thermodynamics, these studies show a large bias favoring CO2 production over methane generation. In this talk, we will use an array of complementary analytical techniques including FT-IR, cellulose and lignin measurements, 13C-NMR, fluorescence spectroscopy, and ultra-high resolution mass spectrometry to describe organic matter degradation within a peat column and identify the important degradation mechanisms. Hydrogenation was the most common transformation observed in the ultra-high resolution mass spectrometry data. From these results we propose a new mechanism for consuming H2 generated during CO2 production, without concomitant methane formation, consistent with observed high CO2/CH4 ratios. While homoacetogenesis is a known sink for H2 in these systems, this process also consumes CO2 and therefore does not explain the excess CO2 measured in field and incubation samples. Not only does the newly proposed mechanism consume H2 without generating methane, but it also yields enough energy to balance the coupled syntrophic reactions, thereby restoring thermodynamic order. Schematic of organic matter degradation. Solid lines indicate traditional pathways from Conrad (1999), dashed lines indicates new proposed mechanism. JF - American Geophysical Union Fall Meeting AU - Wilson, R AU - Woodcroft, B J AU - Varner, R K AU - Tyson, G W AU - Tfaily, M M AU - Sebestyen, S AU - Saleska, S R AU - Rogers, K AU - Rich, V I AU - McFarlane, K J AU - Kostka, J E AU - Kolka, R K AU - Keller, J AU - Iversen, C M AU - Hodgkins, S B AU - Hanson, P J AU - Guilderson, T P AU - Griffiths, N AU - de La Cruz, F AU - Crill, P M AU - Chanton, J AU - Bridgham, S D AU - Barlaz, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B11H EP - 0536 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/1797532503?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Production+of+excess+CO+%28sub+2%29+relative+to+methane+in+peatlands%3B+a+new+H+%28sub+2%29+sink&rft.au=Wilson%2C+R%3BWoodcroft%2C+B+J%3BVarner%2C+R+K%3BTyson%2C+G+W%3BTfaily%2C+M+M%3BSebestyen%2C+S%3BSaleska%2C+S+R%3BRogers%2C+K%3BRich%2C+V+I%3BMcFarlane%2C+K+J%3BKostka%2C+J+E%3BKolka%2C+R+K%3BKeller%2C+J%3BIversen%2C+C+M%3BHodgkins%2C+S+B%3BHanson%2C+P+J%3BGuilderson%2C+T+P%3BGriffiths%2C+N%3Bde+La+Cruz%2C+F%3BCrill%2C+P+M%3BChanton%2C+J%3BBridgham%2C+S+D%3BBarlaz%2C+M%3BAnonymous&rft.aulast=Wilson&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 - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Cosmogenic (super 10) Be chronologies of moraines and glacially scoured bedrock in the Teton Range, with implications for paleoclimatic events and tectonic activity AN - 1797529754; 2016-053462 AB - At its Pleistocene maximum, the greater Yellowstone glacial system consisted of an ice cap on the Yellowstone Plateau joined by glaciers from adjacent high mountains, including the Teton Range. In prior research, we obtained 112 exposure ages from moraines and bedrock in this region. These chronologies identified asynchronous outlet glacier culminations around the periphery of the Yellowstone glacier complex, supporting a model of spatial and temporal progressions in buildup and decay of the various ice source regions. Here we build on this previous work and present >30 recently developed 10Be exposure ages on glacial features in the Teton Range. Although the Tetons harbored a relatively small portion of the greater Yellowstone ice complex, glaciers in this range left behind some of the region's best-preserved moraine sequences and scoured bedrock. Ongoing investigations are focused on developing moraine chronologies in several drainages on the eastern and western Teton Range fronts, and obtaining exposure ages along scoured bedrock transects in glacial troughs upvalley from the dated moraines to define rates of ice recession. Notably, our dating campaign includes lateral moraines that are offset by the Teton fault, providing a rare opportunity to establish direct constraints on integrated long-term slip rates. All new and previously obtained 10Be ages are calculated using recently published calibrations and scaling of 10Be production rates. Initial results show that massive lateral moraines in selected drainages are several thousands of years older than adjacent distal end moraines, implying that the laterals were constructed during an earlier phase of the last glaciation and then acted to topographically confine subsequent ice advances. Mean ages of ca. 17-16 ka from terminal moraine loops along with limiting ages from scoured bedrock upvalley of the moraines indicate glacier culminations followed by the onset of rapid ice retreat long after the end of the global Last Glacial Maximum, but well before the start of the Bolling-Allerod warm interval. This expanded chronology provides a refined understanding of the timing of late Pleistocene glacier events in the central Rocky Mountains, and allows a more critical examination of climatic influences on glacier fluctuations in this region. JF - American Geophysical Union Fall Meeting AU - Licciardi, Joe M AU - Pierce, K L AU - Thackray, G D AU - Finkel, R C AU - Zimmerman, S R H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract PP51E EP - 02 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/1797529754?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cosmogenic+%28super+10%29+Be+chronologies+of+moraines+and+glacially+scoured+bedrock+in+the+Teton+Range%2C+with+implications+for+paleoclimatic+events+and+tectonic+activity&rft.au=Licciardi%2C+Joe+M%3BPierce%2C+K+L%3BThackray%2C+G+D%3BFinkel%2C+R+C%3BZimmerman%2C+S+R+H%3BAnonymous&rft.aulast=Licciardi&rft.aufirst=Joe&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 - Holocene carbon accumulation rates in the SPRUCE bog prior to warming and elevated CO (sub 2) treatment AN - 1797529556; 2016-053202 AB - In the Spruce and Peatland Responses Under Climatic and Environmental Change (SPRUCE) experiment warming and elevated CO2 treatments are being applied to an ombrotrophic spruce bog: the S1 Bog (S1) at Marcell Experimental Forest in northern Minnesota. To provide a historical context for recent and expected experimentally-induced changes in the bog's belowground carbon balance, we reconstructed historical carbon accumulation rates in peat using radiocarbon from 19 peat cores collected from randomly distributed SPRUCE plots. This unusually high number of cores allows us to assess spatial variability in age-depth profiles and accumulation rates across the SPRUCE study area within S1. This data, along with recent C flux measurements, show that the bog has been accumulating carbon for at least 12,0000 years and has continued to be a sink for atmospheric carbon of approximately 150 g C m-2 yr-1 in recent decades. Early Holocene accumulation rates are similar to those reported for other northern peatlands (approximately 25 g C m-2 yr-1), but apparent carbon accumulation decreased substantially around 3,000 years ago (to 5-15 g C m-2 yr-1) and stayed low until the last century. This decrease is considerably larger than that reported for other peatlands and is therefore unlikely to result only from cooling during the Holocene or bog succession. Although no charcoal has been found in peat at this site, evidence from a neighboring bog indicates a considerable amount of peat formed during this period was consumed by fire and it is possible that smoldering fires consumed peat, resulting in low apparent accumulation rates. Past droughts may have also contributed to observed trends by lowering the acrotelm/catotelm boundary, allowing for enhanced aerobic peat decomposition. This work provides important background information on spatial variability and carbon biogeochemistry that will aid in interpretation of climate change simulation experiments at S1. JF - American Geophysical Union Fall Meeting AU - McFarlane, K J AU - Iversen, C M AU - Phillips, J R AU - Brice, D J AU - Hanson, P J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B11H EP - 0540 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/1797529556?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Holocene+carbon+accumulation+rates+in+the+SPRUCE+bog+prior+to+warming+and+elevated+CO+%28sub+2%29+treatment&rft.au=McFarlane%2C+K+J%3BIversen%2C+C+M%3BPhillips%2C+J+R%3BBrice%2C+D+J%3BHanson%2C+P+J%3BAnonymous&rft.aulast=McFarlane&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 - 2016-06-17 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 - Analysis of the source physics experiment SPE4 prime using state-of-the-art parallel numerical tools AN - 1793207213; 2016-046749 AB - This work describes a methodology used for large scale modeling of wave propagation from underground chemical explosions conducted at the Nevada National Security Site (NNSS) fractured granitic rock. We show that the discrete natures of rock masses as well as the spatial variability of the fabric of rock properties are very important to understand ground motions induced by underground explosions. In order to build a credible conceptual model of the subsurface we integrated the geological, geomechanical and geophysical characterizations conducted during recent test at the NNSS as well as historical data from the characterization during the underground nuclear test conducted at the NNSS. Because detailed site characterization is limited, expensive and, in some instances, impossible we have numerically investigated the effects of the characterization gaps on the overall response of the system. We performed several computational studies to identify the key important geologic features specific to fractured media mainly the joints characterized at the NNSS. We have also explored common key features to both geological environments such as saturation and topography and assess which characteristics affect the most the ground motion in the near-field and in the far-field. Stochastic representation of these features based on the field characterizations has been implemented into LLNL's Geodyn-L hydrocode. Simulations were used to guide site characterization efforts in order to provide the essential data to the modeling community. We validate our computational results by comparing the measured and computed ground motion at various ranges for the recently executed SPE4 prime experiment. We have also conducted a comparative study between SPE4 prime and previous experiments SPE1 and SPE3 to assess similarities and differences and draw conclusions on designing SPE5. JF - American Geophysical Union Fall Meeting AU - Vorobiev, O AU - Ezzedine, S M AU - Antoun, T AU - Glenn, L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2813 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207213?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+the+source+physics+experiment+SPE4+prime+using+state-of-the-art+parallel+numerical+tools&rft.au=Vorobiev%2C+O%3BEzzedine%2C+S+M%3BAntoun%2C+T%3BGlenn%2C+L%3BAnonymous&rft.aulast=Vorobiev&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 - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Rigorous approach in investigation of seismic structure and source characteristics in northeast Asia; hierarchical and trans-dimensional Bayesian inversion AN - 1793207152; 2016-046764 AB - Conventional approaches to inverse problems suffer from non-linearity and non-uniqueness in estimations of seismic structures and source properties. Estimated results and associated uncertainties are often biased by applied regularizations and additional constraints, which are commonly introduced to solve such problems. Bayesian methods, however, provide statistically meaningful estimations of models and their uncertainties constrained by data information. In addition, hierarchical and trans-dimensional (trans-D) techniques are inherently implemented in the Bayesian framework to account for involved error statistics and model parameterizations, and, in turn, allow more rigorous estimations of the same. Here, we apply Bayesian methods throughout the entire inference process to estimate seismic structures and source properties in Northeast Asia including east China, the Korean peninsula, and the Japanese islands. Ambient noise analysis is first performed to obtain a base three-dimensional (3-D) heterogeneity model using continuous broadband waveforms from more than 300 stations. As for the tomography of surface wave group and phase velocities in the 5-70 s band, we adopt a hierarchical and trans-D Bayesian inversion method using Voronoi partition. The 3-D heterogeneity model is further improved by joint inversions of teleseismic receiver functions and dispersion data using a newly developed high-efficiency Bayesian technique. The obtained model is subsequently used to prepare 3-D structural Green's functions for the source characterization. A hierarchical Bayesian method for point source inversion using regional complete waveform data is applied to selected events from the region. The seismic structure and source characteristics with rigorously estimated uncertainties from the novel Bayesian methods provide enhanced monitoring and discrimination of seismic events in northeast Asia. JF - American Geophysical Union Fall Meeting AU - Mustac, Marija AU - Kim, S AU - Tkalcic, Hrvoje AU - Rhie, J AU - Chen, Y AU - Ford, S R AU - Sebastian, Nita AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2828 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207152?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Rigorous+approach+in+investigation+of+seismic+structure+and+source+characteristics+in+northeast+Asia%3B+hierarchical+and+trans-dimensional+Bayesian+inversion&rft.au=Mustac%2C+Marija%3BKim%2C+S%3BTkalcic%2C+Hrvoje%3BRhie%2C+J%3BChen%2C+Y%3BFord%2C+S+R%3BSebastian%2C+Nita%3BAnonymous&rft.aulast=Mustac&rft.aufirst=Marija&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 - Cavity radius scaling for chemical explosions in granite AN - 1793206807; 2016-046758 AB - It was long argued that the far-field seismic amplitudes from explosions are determined by the volume change in the source region, mainly due to a formation of the explosive cavities (e.g. Denny and Johnson, 1991). Weston Geophysical performed measurements of the cavities left by small chemical explosions in hard rock in New England. The comparison of the measured cavity sizes with historical data from nuclear and chemical explosions in hard rock (e.g. granite) shows that the cavity radii scale as W1/3 and appear to be depth independent because the rock strength significantly exceeds the overburden pressure for all possible explosion depths. The cavity sizes produced by nuclear explosions in softer rock (e.g. alluvium) deviate from the cubic root scaling and depend on the confining pressure. Cavity size calculations as a function of yield using hydrodynamic simulations with GEODYN, an Eulerian hydrodynamic code developed at Lawrence Livermore National Laboratory, support these observations. We investigate the effects of the cavity size as well as the extent of the damage zones on seismic radiation. JF - American Geophysical Union Fall Meeting AU - Stroujkova, Ana F AU - Vorobiev, O AU - Carnevale, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2822 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/1793206807?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cavity+radius+scaling+for+chemical+explosions+in+granite&rft.au=Stroujkova%2C+Ana+F%3BVorobiev%2C+O%3BCarnevale%2C+M%3BAnonymous&rft.aulast=Stroujkova&rft.aufirst=Ana&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 - Using passive seismic methods to detect underground cavities AN - 1793206802; 2016-046762 AB - An underground cavity (or low velocity anomaly) may interact with a seismic wavefield in several ways: scattering or reflecting seismic body waves, changing the dispersion of surface waves, inducing resonances within the cavity, or by generating waves traveling around the cavity interface. In theory, these features may be observed using either active or passive seismic surveys. We explore the possibility of detecting the sites of underground nuclear explosions using passive seismic data first by generating a set of synthetic models and second by a field experiment. We generated 3D synthetics on an idealized representation of the cavity and chimney and estimated constraints on detection. Eight broadband seismometers were deployed around the site of a known underground nuclear explosion (UNE) at the U.S. Nevada National Security Site. Examination of the observed data does not show clear indications of resonance within the cavity and chimney caused by seismic waves from teleseismic, regional, or local earthquakes. Green's functions of raypaths between station pairs have been generated using seismic interferometry based on ambient seismic noise and these will be used to generate a tomographic model. Prepared by LLNL under Contract DE-AC52-07NA27344. Release number LLNL-ABS-675177. JF - American Geophysical Union Fall Meeting AU - Mellors, R J AU - Matzel, E AU - Sweeney, J J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2826 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206802?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+passive+seismic+methods+to+detect+underground+cavities&rft.au=Mellors%2C+R+J%3BMatzel%2C+E%3BSweeney%2C+J+J%3BAnonymous&rft.aulast=Mellors&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 - Yield determination of underground and near surface explosions AN - 1793206790; 2016-046747 AB - As seismic coverage of the earth's surface continues to improve, we are faced with signals from a wide variety of explosions from various sources ranging from oil train and ordnance explosions to military and terrorist attacks, as well as underground nuclear tests. We present on a method for determining the yield of underground and near surface explosions, which should be applicable for many of these. We first review the regional envelope method that was developed for underground explosions (Pasyanos et al., 2012) and more recently modified for near surface explosions (Pasyanos and Ford, 2015). The technique models the waveform envelope templates as a product of source, propagation (geometrical spreading and attenuation), and site terms, while near surface explosions include an additional surface effect. Yields and depths are determined by comparing the observed envelopes to the templates and minimizing the misfit. We then apply the method to nuclear and chemical explosions for a range of yields, depths, and distances. We will review some results from previous work, and show new examples from ordnance explosions in Scandinavia, nuclear explosions in Eurasia, and chemical explosions in Nevada associated with the Source Physics Experiments (SPE). JF - American Geophysical Union Fall Meeting AU - Pasyanos, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2811 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/1793206790?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Yield+determination+of+underground+and+near+surface+explosions&rft.au=Pasyanos%2C+M%3BAnonymous&rft.aulast=Pasyanos&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 - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Finite-difference modeling of seismic wave scattering in 3D heterogeneous media; generation of tangential motion from an explosion source AN - 1793206785; 2016-046753 AB - One challenging task in explosion seismology is development of physical models for explaining the generation of S-waves during underground explosions. Pitarka et al. (2015) used finite difference simulations of SPE-3 (part of Source Physics Experiment, SPE, an ongoing series of underground chemical explosions at the Nevada National Security Site) and found that while a large component of shear motion was generated directly at the source, additional scattering from heterogeneous velocity structure and topography are necessary to better match the data. Large-scale features in the velocity model used in the SPE simulations are well constrained, however, small-scale heterogeneity is poorly constrained. In our study we used a stochastic representation of small-scale variability in order to produce additional high-frequency scattering. Two methods for generating the distributions of random scatterers are tested. The first is done in the spatial domain by essentially smoothing a set of random numbers over an ellipsoidal volume using a Gaussian weighting function. The second method consists of filtering a set of random numbers in the wavenumber domain to obtain a set of heterogeneities with a desired statistical distribution (Frankel and Clayton, 1986). This method is capable of generating distributions with either Gaussian or von Karman autocorrelation functions. The key parameters that affect scattering are the correlation length, the standard deviation of velocity for the heterogeneities, and the Hurst exponent, which is only present in the von Karman media. Overall, we find that shorter correlation lengths as well as higher standard deviations result in increased tangential motion in the frequency band of interest (0 - 10 Hz). This occurs partially through S-wave refraction, but mostly by P-S and Rg-S waves conversions. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 JF - American Geophysical Union Fall Meeting AU - Hirakawa, E T AU - Pitarka, A AU - Mellors, R J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2817 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/1793206785?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Finite-difference+modeling+of+seismic+wave+scattering+in+3D+heterogeneous+media%3B+generation+of+tangential+motion+from+an+explosion+source&rft.au=Hirakawa%2C+E+T%3BPitarka%2C+A%3BMellors%2C+R+J%3BAnonymous&rft.aulast=Hirakawa&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 - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Infrasound waveform inversion and mass flux validation from Sakurajima Volcano, Japan AN - 1793206766; 2016-046782 AB - Recent advances in numerical wave propagation modeling and station coverage have permitted robust inversion of infrasound data from volcanic explosions. Complex topography and crater morphology have been shown to substantially affect the infrasound waveform, suggesting that homogeneous acoustic propagation assumptions are invalid. Infrasound waveform inversion provides an exciting tool to accurately characterize emission volume and mass flux from both volcanic and non-volcanic explosions. Mass flux, arguably the most sought-after parameter from a volcanic eruption, can be determined from the volume flux using infrasound waveform inversion if the volcanic flow is well-characterized. Thus far, infrasound-based volume and mass flux estimates have yet to be validated. In February 2015 we deployed six infrasound stations around the explosive Sakurajima Volcano, Japan for 8 days. Here we present our full waveform inversion method and volume and mass flux estimates of numerous high amplitude explosions using a high resolution DEM and 3-D Finite Difference Time Domain modeling. Application of this technique to volcanic eruptions may produce realistic estimates of mass flux and plume height necessary for volcanic hazard mitigation. Several ground-based instruments and methods are used to independently determine the volume, composition, and mass flux of individual volcanic explosions. Specifically, we use ground-based ash sampling, multispectral infrared imagery, UV spectrometry, and multigas data to estimate the plume composition and flux. Unique tiltmeter data from underground tunnels at Sakurajima also provides a way to estimate the volume and mass of each explosion. In this presentation we compare the volume and mass flux estimates derived from the different methods and discuss sources of error and future improvements. JF - American Geophysical Union Fall Meeting AU - Fee, D AU - Kim, K AU - Yokoo, A AU - Izbekov, P E AU - Lopez, T M AU - Prata, F AU - Ahonen, P AU - Kazahaya, R AU - Nakamichi, H AU - Iguchi, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53D 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/1793206766?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Infrasound+waveform+inversion+and+mass+flux+validation+from+Sakurajima+Volcano%2C+Japan&rft.au=Fee%2C+D%3BKim%2C+K%3BYokoo%2C+A%3BIzbekov%2C+P+E%3BLopez%2C+T+M%3BPrata%2C+F%3BAhonen%2C+P%3BKazahaya%2C+R%3BNakamichi%2C+H%3BIguchi%2C+M%3BAnonymous&rft.aulast=Fee&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 - Near source structural effects on seismic waves; implication for shear motion generation during SPE-4Prime AN - 1793206696; 2016-046743 AB - We have analyzed effects of wave scattering due to near-source structural complexity and sliding joint motion on generation of shear waves from SPE-4Pprime, a shallow chemical explosion conducted at the Nevada National Security Site. In addition to analyzing far-field ground motion recorded on three-component geophones, we performed high-frequency simulations of the explosion using a finite difference method and heterogeneous media with stochastic variability. The stochastic variations of seismic velocity were modeled using Gaussian correlation functions. Using simulations and recorded waveforms we demonstrate the implication of wave scattering on generation of shear motion, and show the gradual increase of shear motion energy as the waves propagate through media with variable scattering. The amplitude and duration of shear waves resulting from wave scattering are found to be dependent on the model complexity and to a lesser extent to source distance. Analysis of shear-motion generation due to joint motion were conducted using numerical simulations performed with GEODYN-L, a parallelized Lagrangian hydrocode, while a stochastic approach was used in depicting the properties of joints. Separated effects of source and wave scattering on shear motion generation will be shown through simulated motion. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 Release Number: LLNL-ABS-675570 JF - American Geophysical Union Fall Meeting AU - Pitarka, A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2807 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206696?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Near+source+structural+effects+on+seismic+waves%3B+implication+for+shear+motion+generation+during+SPE-4Prime&rft.au=Pitarka%2C+A%3BAnonymous&rft.aulast=Pitarka&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 - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - High resolution regional attenuation for the source physics experiment using multiphase inversion AN - 1793206683; 2016-046746 AB - Seismic event amplitude measurement plays a critical role in the discrimination between earthquakes and explosions. An accurate 2D model of the attenuation experienced by seismic waves traveling through the earth is especially important for reasonable amplitude estimation at small event-to-station distances. In this study, we investigate the detailed attenuation structure in the region around southern Nevada as part of the Source Physics Experiment (SPE). The SPE consists of a series of chemical explosions at the Nevada National Security Site (NNSS) designed to improve our understanding of explosion physics and enable better modeling of explosion sources. Phase I of the SPE is currently being conducted in the Climax Stock Granite and Phase II will move to a contrasting dry alluvium geology. A high-resolution attenuation model will aid in the modeling efforts of these experiments. To improve our understanding of the propagation of energy from sources in the area to local and regional stations in the western U.S., we invert regional phases Pn, Pg, and Lg to examine the crust and upper mantle attenuation structure of southern Nevada and the surrounding region. We consider observed amplitudes as the frequency-domain product of a source term, a site term, a geometrical spreading term, and an attenuation (Q) term (e.g. Walter and Taylor, 2001). Initially we take a staged approach to first determine the best 1D Q values; next we calculate source terms using the 1D model, and finally we solve for the best 2D Q parameters and site terms considering all frequencies simultaneously. Our preliminary results agree generally with those from the continent-wide study by Pasyanos (2013). With additional data we are working to develop a more detailed and higher frequency model of the region as well as move toward a fully non-linear inversion. JF - American Geophysical Union Fall Meeting AU - Pyle, Moira L AU - Walter, W R AU - Pasyanos, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2810 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206683?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+resolution+regional+attenuation+for+the+source+physics+experiment+using+multiphase+inversion&rft.au=Pyle%2C+Moira+L%3BWalter%2C+W+R%3BPasyanos%2C+M%3BAnonymous&rft.aulast=Pyle&rft.aufirst=Moira&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 - Moment tensor analysis of shallow sources AN - 1793206620; 2016-046737 AB - A potential issue for moment tensor inversion of shallow seismic sources is that some moment tensor components have vanishing amplitudes at the free surface, which can result in bias in the moment tensor solution. The effects of the free-surface on the stability of the moment tensor method becomes important as we continue to investigate and improve the capabilities of regional full moment tensor inversion for source-type identification and discrimination. It is important to understand these free surface effects on discriminating shallow explosive sources for nuclear monitoring purposes. It may also be important in natural systems that have shallow seismicity such as volcanoes and geothermal systems. In this study, we apply the moment tensor based discrimination method to the HUMMING ALBATROSS quarry blasts. These shallow chemical explosions at approximately 10 m depth and recorded up to several kilometers distance represent rather severe source-station geometry in terms of vanishing traction issues. We show that the method is capable of recovering a predominantly explosive source mechanism, and the combined waveform and first motion method enables the unique discrimination of these events. Recovering the correct yield using seismic moment estimates from moment tensor inversion remains challenging but we can begin to put error bounds on our moment estimates using the NSS technique. JF - American Geophysical Union Fall Meeting AU - Chiang, A AU - Dreger, D S AU - Ford, S R AU - Walter, W R AU - Yoo, S H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2801 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+analysis+of+shallow+sources&rft.au=Chiang%2C+A%3BDreger%2C+D+S%3BFord%2C+S+R%3BWalter%2C+W+R%3BYoo%2C+S+H%3BAnonymous&rft.aulast=Chiang&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 - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integrated geophysical analysis at a legacy test site AN - 1793206615; 2016-046755 AB - We integrate magnetic, electromagnetic (EM), gravity, and seismic data to develop a unified and consistent model of the subsurface at the U20ak site on Pahute Mesa at the Nevada National Nuclear Security Site (NNSS). The 1985 test, conducted in tuff at a depth of approximately 600 m did not collapse to the surface or produce a crater. The purpose of the geophysical measurements is to characterize the subsurface above and around the presumed explosion cavity. The magnetic data are used to locate steel borehole casings and pipes and are correlated with surface observations. The EM data show variation in lithology at depth and clear signatures from borehole casings and surface cables. The gravity survey detects a clear gravity low in the area of the explosion. The seismic data indicates shallow low velocity zone and indications of a deeper low velocity zones. In this study, we conduct 2D inversion of EM data for better characterization of site geology and use a common 3D density model to jointly interpret both the seismic and gravity data along with constraints on lithology boundaries from the EM. The integration of disparate geophysical datasets allows improved understanding of the non-prompt physical signatures of an underground nuclear explosion (UNE). LLNL Release Number: LLNL-ABS-675677. The authors express their gratitude to the National Nuclear Security Administration, Defense Nuclear Nonproliferation Research and Development, and the Comprehensive Inspection Technologies and UNESE working group, a multi-institutional and interdisciplinary group of scientists and engineers. This work was performed by Lawrence Livermore National Laboratory and Los Alamos National Laboratory under award number DE-AC52-06NA25946. JF - American Geophysical Union Fall Meeting AU - Yang, X AU - Mellors, R J AU - Sweeney, Jerry J AU - Sussman, A J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2819 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/1793206615?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+geophysical+analysis+at+a+legacy+test+site&rft.au=Yang%2C+X%3BMellors%2C+R+J%3BSweeney%2C+Jerry+J%3BSussman%2C+A+J%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 - Acoustic full waveform inversion to characterize near-surface chemical explosions AN - 1793206609; 2016-046740 AB - Recent high-quality, atmospheric overpressure data from chemical high-explosive experiments provide a unique opportunity to characterize near-surface explosions, specifically estimating yield and source time function. Typically, yield is estimated from measured signal features, such as peak pressure, impulse, duration and/or arrival time of acoustic signals. However, the application of full waveform inversion to acoustic signals for yield estimation has not been fully explored. In this study, we apply a full waveform inversion method to local overpressure data to extract accurate pressure-time histories of acoustics sources during chemical explosions. A robust and accurate inversion technique for acoustic source is investigated using numerical Green's functions that take into account atmospheric and topographic propagation effects. The inverted pressure-time history represents the pressure fluctuation at the source region associated with the explosion, and thus, provides a valuable information about acoustic source mechanisms and characteristics in greater detail. We compare acoustic source properties (i.e., peak overpressure, duration, and non-isotropic shape) of a series of explosions having different emplacement conditions and investigate the relationship of the acoustic sources to the yields of explosions. The time histories of acoustic sources may refine our knowledge of sound-generation mechanisms of shallow explosions, and thereby allow for accurate yield estimation based on acoustic measurements. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Kim, K AU - Rodgers, A J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2804 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/1793206609?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Acoustic+full+waveform+inversion+to+characterize+near-surface+chemical+explosions&rft.au=Kim%2C+K%3BRodgers%2C+A+J%3BAnonymous&rft.aulast=Kim&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 - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - BayesMT; Bayesian inference for the seismic moment tensor using regional and teleseismic-P waveforms with first-motion data and a calibrated prior distribution of velocity models AN - 1789753554; 2016-042552 AB - The largest source of uncertainty in any source inversion is the velocity model used to construct the transfer function employed in the forward model that relates observed ground motion to the seismic moment tensor. We attempt to incorporate this uncertainty into an estimation of the seismic moment tensor using a posterior distribution of velocity models based on different and complementary data sets, including thickness constraints, velocity profiles, gravity data, surface wave group velocities, and regional body wave traveltimes. The posterior distribution of velocity models is then used to construct a prior distribution of Green's functions for use in Bayesian inference of an unknown seismic moment tensor using regional and teleseismic-P waveforms with first-motion data. The use of multiple data sets is important for gaining resolution to different components of the moment tensor. The combined likelihood is estimated using data-specific error models and the posterior of the seismic moment tensor is estimated and interpreted in terms of most-probable source-type. Prepared by LLNL under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Ford, S R AU - Kim, S AU - Chiang, A AU - Tkalcic, H AU - Walter, W R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S21B EP - 2684 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789753554?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=BayesMT%3B+Bayesian+inference+for+the+seismic+moment+tensor+using+regional+and+teleseismic-P+waveforms+with+first-motion+data+and+a+calibrated+prior+distribution+of+velocity+models&rft.au=Ford%2C+S+R%3BKim%2C+S%3BChiang%2C+A%3BTkalcic%2C+H%3BWalter%2C+W+R%3BAnonymous&rft.aulast=Ford&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 - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Understanding the physical causes of surface wave amplitude variations across eastern Asia through seismic waveform simulation AN - 1789753377; 2016-042637 AB - Understanding the physical causes of surface wave amplitude variations is essential in many aspects of seismology, including estimation of the magnitude of earthquake/anthropogenic events, study of the attenuation properties of Earth's interior, and analysis of the ground motion for engineering seismology and hazard assessment. This topic remains challenging in part due to the lack of high-quality earth models, and also because numerous factors may significantly affect surface wave amplitudes. These include: 1) source directivity, 2) anelastic attenuation, 3) multipathing and focusing/defocusing, and 4) local amplification. To better understand the physical causes of the surface wave amplitude variations across Eastern Asia, we model seismic wave propagation using the crustal and uppermost mantle model constructed by Shen et al. (2015), which was produced using surface wave datasets and which captured many geological features. We apply the spectral element method (SEM) and a node-based finite-difference approach perform Rayleigh wave waveform modeling across Eastern Asia. By measuring and analyzing the results of the surface wave waveform modeling, we separate and quantify the effects on surface wave amplitudes; notably , focusing/defocusing and local amplification effects. Our results illuminate the causes of observed amplitude variations across Eastern Asia from earthquake and anthropogenic sources and guide future research based on surface wave amplitudes. JF - American Geophysical Union Fall Meeting AU - Feng, L AU - Shen, W AU - Rodgers, A J AU - Ritzwoller, M H AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S23C EP - 2725 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789753377?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Understanding+the+physical+causes+of+surface+wave+amplitude+variations+across+eastern+Asia+through+seismic+waveform+simulation&rft.au=Feng%2C+L%3BShen%2C+W%3BRodgers%2C+A+J%3BRitzwoller%2C+M+H%3BAnonymous&rft.aulast=Feng&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 - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Seismic characterization of the Newberry and Cooper Basin EGS sites AN - 1789747951; 2016-044714 AB - To aid in the seismic characterization of Engineered Geothermal Systems (EGS), we enhance traditional microearthquake detection and location methodologies at two EGS systems: the Newberry EGS site and the Habanero EGS site in the Cooper Basin of South Australia. We apply the Matched Field Processing (MFP) seismic imaging technique to detect new seismic events using known discrete microearthquake sources. Events identified using MFP typically have smaller magnitudes or occur within the coda of a larger event. Additionally, we apply a Bayesian multiple-event location algorithm, called MicroBayesLoc, to estimate the 95% probability ellipsoids for events with high signal-to-noise ratios (SNR). Such probability ellipsoid information can provide evidence for determining if a seismic lineation is real, or simply within the anticipated error range. At the Newberry EGS site, 235 events were reported in the original catalog. MFP identified 164 additional events (an increase of over 70% more events). For the relocated events in the Newberry catalog, we can distinguish two distinct seismic swarms that fall outside of one another's 95% probability error ellipsoids. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Templeton, D C AU - Wang, J AU - Goebel, M AU - Johannesson, G AU - Myers, S C AU - Harris, D AU - Cladouhos, T T AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S12A EP - 04 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789747951?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+characterization+of+the+Newberry+and+Cooper+Basin+EGS+sites&rft.au=Templeton%2C+D+C%3BWang%2C+J%3BGoebel%2C+M%3BJohannesson%2C+G%3BMyers%2C+S+C%3BHarris%2C+D%3BCladouhos%2C+T+T%3BAnonymous&rft.aulast=Templeton&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 - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Looking inside the microseismic cloud using seismic interferometry AN - 1789747108; 2016-044752 AB - Microseismicity provides a direct means of measuring the physical characteristics of active tectonic features such as fault zones. Thousands of microquakes are often associated with an active site. This cloud of microseismicity helps define the tectonically active region. When processed using novel geophysical techniques, we can isolate the energy sensitive to the faulting region, itself. The virtual seismometer method (VSM) is a technique of seismic interferometry that provides precise estimates of the GF between earthquakes. In many ways the converse of ambient noise correlation, it is very sensitive to the source parameters (location, mechanism and magnitude) and to the Earth structure in the source region. In a region with 1000 microseisms, we can calculate roughly 500,000 waveforms sampling the active zone. At the same time, VSM collapses the computation domain down to the size of the cloud of microseismicity, often by 2-3 orders of magnitude. In simple terms VSM involves correlating the waveforms from a pair of events recorded at an individual station and then stacking the results over all stations to obtain the final result. In the far-field, when most of the stations in a network fall along a line between the two events, the result is an estimate of the GF between the two, modified by the source terms. In this geometry each earthquake is effectively a virtual seismometer recording all the others. When applied to microquakes, this alignment is often not met, and we also need to address the effects of the geometry between the two microquakes relative to each seismometer. Nonetheless, the technique is quite robust, and highly sensitive to the microseismic cloud. Using data from the Salton Sea geothermal region, we demonstrate the power of the technique, illustrating our ability to scale the technique from the far-field, where sources are well separated, to the near field where their locations fall within each other's uncertainty ellipse. VSM provides better illumination of the complex subsurface by generating precise, high frequency estimates of the GF and resolution of seismic properties between every pair of events. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Matzel, E AU - Rhode, A AU - Morency, C AU - Templeton, D C AU - Pyle, M L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S33F 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/1789747108?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Looking+inside+the+microseismic+cloud+using+seismic+interferometry&rft.au=Matzel%2C+E%3BRhode%2C+A%3BMorency%2C+C%3BTempleton%2C+D+C%3BPyle%2C+M+L%3BAnonymous&rft.aulast=Matzel&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 - Testing the SH1D assumption for geotechnical site and basin response using 3D finite difference modeling AN - 1784738079; 2016-035984 AB - Current state-of-practice of geotechnical site response and soil-structure analyses generally assume a vertically propagating horizontally polarized plane wave is incident on a plane-layered (one-dimensional) soil column. Ground motions representing the wavefield incident to the bedrock base of the soil column are developed from observed and sometimes scaled time-histories or synthesized by various methods. The site-specific ground motion at the surface is then computed from the response of the soil column to the bedrock incident wavefield, possibly including non-linear response of the geotechnical near-surface. This is the so-called SH1D assumption. While this approach is widely used, it ignores important complexities of the incident wavefield. Specifically, the standard approach assumes: 1) the incident wavefield is only composed of vertically propagating body waves; 2) ignores oblique incidence; and 3) neglects the three-component nature of the wavefield that includes surface waves and rotational motions. Surface waves often carry much of the seismic energy and can excite all three components of motion. Therefore, it seems most appropriate to include the most representative characterization of the incident wavefield in site-specific analyses. We are performing parametric studies with three-dimensional (3D) elastic finite difference simulations to compare the near-surface response of sedimentary basins to horizontally polarized planes (arbitrary incident) and point source (double couple) earthquakes. Simulations involve simple, parametric representations of basin geometries and layered material properties of the sedimentary basin and surrounding hard rock. We compare the frequency-dependent site response for different excitations and attempt to quantify the differences between the plane-wave and fully 3D basin response. JF - American Geophysical Union Fall Meeting AU - Rodgers, A J AU - Pitarka, A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S41C EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1784738079?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+the+SH1D+assumption+for+geotechnical+site+and+basin+response+using+3D+finite+difference+modeling&rft.au=Rodgers%2C+A+J%3BPitarka%2C+A%3BAnonymous&rft.aulast=Rodgers&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 - 2016-04-28 N1 - CODEN - #07548 ER - TY - JOUR T1 - Long-period seismicity at the Napoleonville salt dome; implications for local seismic monitoring of underground hydrocarbon storage caverns AN - 1784736210; 2016-037969 AB - The formation of a large sinkhole at the Napoleonville salt dome, Assumption Parish, Louisiana, in August 2012 was accompanied by a rich sequence of complex seismic events, including long-period (LP) events that were recorded 11 km away at Transportable Array station 544A in White Castle, Louisiana. The LP events have relatively little energy at short periods, which make them difficult to detect using standard high-frequency power detectors, and the majority of energy that reaches the station is peaked near 0.4 Hz. The analysis of the local records reveals that the onset of the 0.4 Hz signals coincides with the S-wave arrival, and therefore it may be a shaking induced resonance in a fluid filled cavern. We created a low-frequency (0.1-0.6 Hz) power detector (short-term average/long-term average) that operated on all three components of the broadband instrument, since considerable energy was detected on the horizontal components. The detections from the power detector were then used as templates in three-channel correlation detectors thereby increasing the number of detections by a little more than a factor of two to nearly 3000. The rate of LP events is approximately one event every other day at the beginning of recording in March 2011. Around 2 May 2012 the rate changes to approximately 7 events per day and then increases to 25 events per day at the beginning of July 2012. Finally, in the days leading up to the sinkhole formation there are approximately 200 LP events per day. The analysis of these events could aid in the development of local seismic monitoring methods for underground industrial storage caverns. Prepared by LLNL under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Dreger, D S AU - Ford, S R AU - Nayak, Avinash AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S13B EP - 2815 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1784736210?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Long-period+seismicity+at+the+Napoleonville+salt+dome%3B+implications+for+local+seismic+monitoring+of+underground+hydrocarbon+storage+caverns&rft.au=Dreger%2C+D+S%3BFord%2C+S+R%3BNayak%2C+Avinash%3BAnonymous&rft.aulast=Dreger&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 - 2016-04-28 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterizing microseismicity at the Newberry Volcano geothermal site using PageRank AN - 1784735928; 2016-037958 AB - The Newberry Volcano, within the Deschutes National Forest in Oregon, has been designated as a candidate site for the Department of Energy's Frontier Observatory for Research in Geothermal Energy (FORGE) program. This site was stimulated using high-pressure fluid injection during the fall of 2012, which generated several hundred microseismic events. Exploring the spatial and temporal development of microseismicity is key to understanding how subsurface stimulation modifies stress, fractures rock, and increases permeability. We analyze Newberry seismicity using both surface and borehole seismometers from the AltaRock and LLNL seismic networks. For our analysis we adapt PageRank, Google's initial search algorithm, to evaluate microseismicity during the 2012 stimulation. PageRank is a measure of connectivity, where higher ranking represents highly connected windows. In seismic applications connectivity is measured by the cross correlation of 2 time windows recorded on a common seismic station and channel. Aguiar and Beroza (2014) used PageRank based on cross correlation to detect low-frequency earthquakes, which are highly repetitive but difficult to detect. We expand on this application by using PageRank to define signal-correlation topology for micro-earthquakes, including the identification of signals that are connected to the largest number of other signals. We then use this information to create signal families and compare PageRank families to the spatial and temporal proximity of associated earthquakes. Studying signal PageRank will potentially allow us to efficiently group earthquakes with similar physical characteristics, such as focal mechanisms and stress drop. Our ultimate goal is to determine whether changes in the state of stress and/or changes in the generation of subsurface fracture networks can be detected using PageRank topology. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-675613. JF - American Geophysical Union Fall Meeting AU - Aguiar, A C AU - Myers, S C AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S13B EP - 2804 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1784735928?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+microseismicity+at+the+Newberry+Volcano+geothermal+site+using+PageRank&rft.au=Aguiar%2C+A+C%3BMyers%2C+S+C%3BAnonymous&rft.aulast=Aguiar&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 - 2016-04-28 N1 - CODEN - #07548 ER - TY - JOUR T1 - Cr(VI) occurrence and geochemistry in water from public supply wells in California AN - 1780805410; 2016-033076 AB - Hexavalent chromium, Cr(VI), in 918 wells sampled throughout California between 2004 and 2012 by the Groundwater Ambient Monitoring and Assessment-Priority Basin Project (GAMA-PBP) ranged from less than the study reporting limit of 1 microgram per liter (mu g/L) to 32 mu g/L. Statewide, Cr(VI) was reported in 31 percent of wells and equaled or exceeded the recently established (2014) California Maximum Contaminant Level (MCL) for Cr(VI) of 10 mu g/L in 4 percent of wells. Cr(VI) data collected for regulatory purposes overestimated Cr(VI) occurrence compared to spatially-distributed GAMA-PBP data. Ninety percent of chromium was present as Cr(VI), which was detected more frequently and at higher concentrations in alkaline (pH > or = 8), oxic water; and more frequently in agricultural and urban land uses compared to native land uses. Chemical, isotopic (tritium and carbon-14), and noble-gas data show high Cr(VI) in water from wells in alluvial aquifers in the southern California deserts result from long groundwater-residence times and geochemical reactions such as silicate weathering that increase pH, while oxic conditions persist. High Cr(VI) in water from wells in alluvial aquifers along the west-side of the Central Valley results from high-chromium in source rock eroded to form those aquifers, and areal recharge processes (including irrigation return) that can mobilize chromium from the unsaturated zone. Cr(VI) co-occurred with oxyanions having similar chemistry, including vanadium, selenium, and uranium. Cr(VI) was positively correlated with nitrate, consistent with increased concentrations in areas of agricultural land use and mobilization of chromium from the unsaturated zone by irrigation return. Abstract Copyright (2015) Elsevier, B.V. JF - Applied Geochemistry AU - Izbicki, John A AU - Wright, Michael T AU - Seymour, Whitney A AU - McCleskey, R Blaine AU - Fram, Miranda S AU - Belitz, Kenneth AU - Esser, Bradley K Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 203 EP - 217 PB - Elsevier, Oxford-New York-Beijing VL - 63 SN - 0883-2927, 0883-2927 KW - United States KW - water quality KW - isotopes KW - water management KW - unsaturated zone KW - hydrogeology KW - drinking water KW - reservoir rocks KW - ground water KW - environmental management KW - California KW - tracers KW - sediments KW - water pollution KW - pH KW - Eh KW - chromium KW - bedrock KW - water supply KW - clastic sediments KW - pollutants KW - statistical analysis KW - agriculture KW - pollution KW - aquifers KW - Central Valley KW - recharge KW - metals KW - residence time KW - alluvium KW - mobilization KW - water wells KW - water resources KW - land use KW - 02B:Hydrochemistry KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780805410?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cr%28VI%29+occurrence+and+geochemistry+in+water+from+public+supply+wells+in+California&rft.au=Izbicki%2C+John+A%3BWright%2C+Michael+T%3BSeymour%2C+Whitney+A%3BMcCleskey%2C+R+Blaine%3BFram%2C+Miranda+S%3BBelitz%2C+Kenneth%3BEsser%2C+Bradley+K&rft.aulast=Izbicki&rft.aufirst=John&rft.date=2015-12-01&rft.volume=63&rft.issue=&rft.spage=203&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2015.08.007 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 - 79 N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-04-14 N1 - SubjectsTermNotLitGenreText - agriculture; alluvium; aquifers; bedrock; California; Central Valley; chromium; clastic sediments; drinking water; Eh; environmental management; ground water; hydrogeology; isotopes; land use; metals; mobilization; pH; pollutants; pollution; recharge; reservoir rocks; residence time; sediments; statistical analysis; tracers; United States; unsaturated zone; water management; water pollution; water quality; water resources; water supply; water wells DO - http://dx.doi.org/10.1016/j.apgeochem.2015.08.007 ER - TY - JOUR T1 - The relationship between interannual and long-term cloud feedbacks AN - 1776666040; PQ0002797312 AB - Analyses of Coupled Model Intercomparison Project phase 5 simulations suggest that climate models with more positive cloud feedback in response to interannual climate fluctuations also have more positive cloud feedback in response to long-term global warming. Ensemble mean vertical profiles of cloud change in response to interannual and long-term surface warming are similar, and the ensemble mean cloud feedback is positive on both timescales. However, the average long-term cloud feedback is smaller than the interannual cloud feedback, likely due to differences in surface warming pattern on the two timescales. Low cloud cover (LCC) change in response to interannual and long-term global surface warming is found to be well correlated across models and explains over half of the covariance between interannual and long-term cloud feedback. The intermodel correlation of LCC across timescales likely results from model-specific sensitivities of LCC to sea surface warming. Key Points * Interannual and long-term cloud feedbacks are well correlated across models * Low cloud cover feedback is most responsible for this correlation * Low cloud cover sensitivity to thermodynamics partially explains the correlation JF - Geophysical Research Letters AU - Zhou, Chen AU - Zelinka, Mark D AU - Dessler, Andrew E AU - Klein, Stephen A AD - Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 10 EP - 10,469 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 42 IS - 23 SN - 0094-8276, 0094-8276 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Sustainability Science Abstracts; Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - Sea surface KW - Climate change KW - Correlations KW - Low clouds KW - Ocean-atmosphere system KW - Modelling KW - Temperature effects KW - Marine KW - Sensitivity KW - Climate models KW - Thermodynamics KW - Simulation Analysis KW - Climates KW - Climate KW - Cloud Cover KW - Brackish KW - Simulation KW - Greenhouse effect KW - Cloud cover KW - Global Warming KW - Sea surface warming KW - Vertical profiles KW - Clouds KW - Numerical simulations KW - Global warming KW - Fluctuations KW - Q2 09262:Methods and instruments KW - P 0000:AIR POLLUTION KW - SW 0810:General KW - M2 551.465:Structure/Dynamics/Circulation (551.465) KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1776666040?accountid=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+relationship+between+interannual+and+long-term+cloud+feedbacks&rft.au=Zhou%2C+Chen%3BZelinka%2C+Mark+D%3BDessler%2C+Andrew+E%3BKlein%2C+Stephen+A&rft.aulast=Zhou&rft.aufirst=Chen&rft.date=2015-12-01&rft.volume=42&rft.issue=23&rft.spage=10&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2015GL066698 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Temperature effects; Sea surface; Thermodynamics; Climate change; Ocean-atmosphere system; Greenhouse effect; Cloud cover; Vertical profiles; Modelling; Clouds; Climate models; Numerical simulations; Correlations; Global warming; Low clouds; Sea surface warming; Sensitivity; Climate; Simulation; Simulation Analysis; Climates; Cloud Cover; Fluctuations; Global Warming; Marine; Brackish DO - http://dx.doi.org/10.1002/2015GL066698 ER - TY - JOUR T1 - Protective spin-labeled fluorenes maintain amyloid beta peptide in small oligomers and limit transitions in secondary structure. AN - 1730023632; 26374940 AB - Alzheimer's disease is characterized by the presence of extracellular plaques comprised of amyloid beta (Aβ) peptides. Soluble oligomers of the Aβ peptide underlie a cascade of neuronal loss and dysfunction associated with Alzheimer's disease. Single particle analyses of Aβ oligomers in solution by fluorescence correlation spectroscopy (FCS) were used to provide real-time descriptions of how spin-labeled fluorenes (SLFs; bi-functional small molecules that block the toxicity of Aβ) prevent and disrupt oligomeric assemblies of Aβ in solution. Furthermore, the circular dichroism (CD) spectrum of untreated Aβ shows a continuous, progressive change over a 24-hour period, while the spectrum of Aβ treated with SLF remains relatively constant following initial incubation. These findings suggest the conformation of Aβ within the oligomer provides a complementary determinant of Aβ toxicity in addition to oligomer growth and size. Although SLF does not produce a dominant state of secondary structure in Aβ, it does induce a net reduction in beta secondary content compared to untreated samples of Aβ. The FCS results, combined with electron paramagnetic resonance spectroscopy and CD spectroscopy, demonstrate SLFs can inhibit the growth of Aβ oligomers and disrupt existing oligomers, while retaining Aβ as a population of smaller, yet largely disordered oligomers. JF - Biochimica et biophysica acta AU - Altman, Robin AU - Ly, Sonny AU - Hilt, Silvia AU - Petrlova, Jitka AU - Maezawa, Izumi AU - Kálai, Tamás AU - Hideg, Kálmán AU - Jin, Lee-Way AU - Laurence, Ted A AU - Voss, John C AD - Department of Biochemistry & Molecular Medicine, University of California Davis, Davis CA 95616, USA. ; Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore CA 94550, USA. ; M.I.N.D. Institute and Department of Pathology and Laboratory Medicine, University of California Davis, Sacramento CA 95817, USA. ; Institute of Organic and Medicinal Chemistry, University of Pécs, H-7624 Pécs, Szigeti st. 12. Pécs, Hungary. ; Department of Biochemistry & Molecular Medicine, University of California Davis, Davis CA 95616, USA. Electronic address: jcvoss@ucdavis.edu. Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 1860 EP - 1870 VL - 1854 IS - 12 SN - 0006-3002, 0006-3002 KW - Amyloid beta-Peptides KW - 0 KW - Fluorenes KW - Spin Labels KW - Index Medicus KW - Circular dichroism spectroscopy KW - Amyloid beta KW - Spin-labeled fluorene KW - Fluorescence correlation spectroscopy KW - Secondary structure KW - Oligomer KW - Protein Structure, Secondary KW - Humans KW - Circular Dichroism KW - Cell Line KW - Amyloid beta-Peptides -- chemistry KW - Fluorenes -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1730023632?accountid=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=Biochimica+et+biophysica+acta&rft.atitle=Protective+spin-labeled+fluorenes+maintain+amyloid+beta+peptide+in+small+oligomers+and+limit+transitions+in+secondary+structure.&rft.au=Altman%2C+Robin%3BLy%2C+Sonny%3BHilt%2C+Silvia%3BPetrlova%2C+Jitka%3BMaezawa%2C+Izumi%3BK%C3%A1lai%2C+Tam%C3%A1s%3BHideg%2C+K%C3%A1lm%C3%A1n%3BJin%2C+Lee-Way%3BLaurence%2C+Ted+A%3BVoss%2C+John+C&rft.aulast=Altman&rft.aufirst=Robin&rft.date=2015-12-01&rft.volume=1854&rft.issue=12&rft.spage=1860&rft.isbn=&rft.btitle=&rft.title=Biochimica+et+biophysica+acta&rft.issn=00063002&rft_id=info:doi/10.1016%2Fj.bbapap.2015.09.002 LA - 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Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.bbapap.2015.09.002 ER - TY - JOUR T1 - Holocene paleoclimate potential of Fallen Leaf Lake sediment cores, Tahoe Basin, California, USA AN - 1832596354; 771784-47 JF - Quaternary International AU - Noble, Paula J AU - Ball, G Ian AU - Smith, Shane B AU - Zimmerman, Susan H AU - Starratt, Scott W AU - St-Jacques, Jeannine-Marie Y1 - 2015/11/11/ PY - 2015 DA - 2015 Nov 11 SP - 141 PB - Elsevier, Oxford VL - 387 SN - 1040-6182, 1040-6182 KW - stratigraphy KW - Plantae KW - Quaternary KW - isotopes KW - Tahoe Basin KW - lead KW - algae KW - paleoclimatology KW - Holocene KW - cores KW - upper Pleistocene KW - Cenozoic KW - radioactive isotopes KW - diatoms KW - turbidite KW - metals KW - carbon KW - Pleistocene KW - C-14 KW - geochemistry KW - microfossils KW - Pb-210 KW - Fallen Leaf Lake KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832596354?accountid=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=Quaternary+International&rft.atitle=Holocene+paleoclimate+potential+of+Fallen+Leaf+Lake+sediment+cores%2C+Tahoe+Basin%2C+California%2C+USA&rft.au=Noble%2C+Paula+J%3BBall%2C+G+Ian%3BSmith%2C+Shane+B%3BZimmerman%2C+Susan+H%3BStarratt%2C+Scott+W%3BSt-Jacques%2C+Jeannine-Marie&rft.aulast=Noble&rft.aufirst=Paula&rft.date=2015-11-11&rft.volume=387&rft.issue=&rft.spage=141&rft.isbn=&rft.btitle=&rft.title=Quaternary+International&rft.issn=10406182&rft_id=info:doi/10.1016%2Fj.quaint.2015.01.158 L2 - http://www.sciencedirect.com/science/journal/10406182 LA - English DB - GeoRef N1 - Conference title - Pacific climate workshop, 26th meeting N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - algae; C-14; carbon; Cenozoic; cores; diatoms; Fallen Leaf Lake; geochemistry; Holocene; isotopes; lead; metals; microfossils; paleoclimatology; Pb-210; Plantae; Pleistocene; Quaternary; radioactive isotopes; stratigraphy; Tahoe Basin; turbidite; upper Pleistocene DO - http://dx.doi.org/10.1016/j.quaint.2015.01.158 ER - TY - JOUR T1 - Cosmogenic (super 10) be depth-profile chronology of late Pleistocene alluvial fan deposits, Baja California, Mexico AN - 1832595956; 771784-17 JF - Quaternary International AU - Antinao, Jose Luis AU - Mcdonald, Eric AU - Gosse, John C AU - Zimmermann, Susan AU - Starratt, Scott W AU - St-Jacques, Jeannine-Marie Y1 - 2015/11/11/ PY - 2015 DA - 2015 Nov 11 SP - 132 EP - 133 PB - Elsevier, Oxford VL - 387 SN - 1040-6182, 1040-6182 KW - alkaline earth metals KW - Quaternary KW - clastic sediments KW - cosmogenic elements KW - upper Pleistocene KW - Cenozoic KW - Mexico KW - chronology KW - metals KW - sediments KW - Pleistocene KW - alluvium KW - Baja California Mexico KW - beryllium KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832595956?accountid=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=Quaternary+International&rft.atitle=Cosmogenic+%28super+10%29+be+depth-profile+chronology+of+late+Pleistocene+alluvial+fan+deposits%2C+Baja+California%2C+Mexico&rft.au=Antinao%2C+Jose+Luis%3BMcdonald%2C+Eric%3BGosse%2C+John+C%3BZimmermann%2C+Susan%3BStarratt%2C+Scott+W%3BSt-Jacques%2C+Jeannine-Marie&rft.aulast=Antinao&rft.aufirst=Jose&rft.date=2015-11-11&rft.volume=387&rft.issue=&rft.spage=132&rft.isbn=&rft.btitle=&rft.title=Quaternary+International&rft.issn=10406182&rft_id=info:doi/10.1016%2Fj.quaint.2015.01.128 L2 - http://www.sciencedirect.com/science/journal/10406182 LA - English DB - GeoRef N1 - Conference title - Pacific climate workshop, 26th meeting 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 - alkaline earth metals; alluvium; Baja California Mexico; beryllium; Cenozoic; chronology; clastic sediments; cosmogenic elements; metals; Mexico; Pleistocene; Quaternary; sediments; upper Pleistocene DO - http://dx.doi.org/10.1016/j.quaint.2015.01.128 ER - TY - JOUR T1 - A record of late Holocene paleomegafloods from Little Packer Lake and Razor Slough, Sacramento Valley oxbow lakes AN - 1832595129; 771784-68 JF - Quaternary International AU - Sullivan, Donald G AU - Byrne, Roger AU - Cowart, Alicia AU - Zimmerman, Susan AU - Starratt, Scott W AU - St-Jacques, Jeannine-Marie Y1 - 2015/11/11/ PY - 2015 DA - 2015 Nov 11 SP - 147 PB - Elsevier, Oxford VL - 387 SN - 1040-6182, 1040-6182 KW - United States KW - isotopes KW - Sacramento Valley KW - Holocene KW - cores KW - magnetic properties KW - Cenozoic KW - California KW - radioactive isotopes KW - dates KW - sedimentation rates KW - Razor Slough KW - carbon KW - paleofloods KW - geochemistry KW - stratigraphy KW - Quaternary KW - X-ray fluorescence KW - Little Packer Lake KW - Glenn County California KW - grain size KW - sedimentation KW - oxbow lakes KW - magnetic susceptibility KW - fluvial features KW - C-14 KW - upper Holocene KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832595129?accountid=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=Quaternary+International&rft.atitle=A+record+of+late+Holocene+paleomegafloods+from+Little+Packer+Lake+and+Razor+Slough%2C+Sacramento+Valley+oxbow+lakes&rft.au=Sullivan%2C+Donald+G%3BByrne%2C+Roger%3BCowart%2C+Alicia%3BZimmerman%2C+Susan%3BStarratt%2C+Scott+W%3BSt-Jacques%2C+Jeannine-Marie&rft.aulast=Sullivan&rft.aufirst=Donald&rft.date=2015-11-11&rft.volume=387&rft.issue=&rft.spage=147&rft.isbn=&rft.btitle=&rft.title=Quaternary+International&rft.issn=10406182&rft_id=info:doi/10.1016%2Fj.quaint.2015.01.179 L2 - http://www.sciencedirect.com/science/journal/10406182 LA - English DB - GeoRef N1 - Conference title - Pacific climate workshop, 26th meeting 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 - C-14; California; carbon; Cenozoic; cores; dates; fluvial features; geochemistry; Glenn County California; grain size; Holocene; isotopes; lake sediments; Little Packer Lake; magnetic properties; magnetic susceptibility; oxbow lakes; paleofloods; Quaternary; radioactive isotopes; Razor Slough; Sacramento Valley; sedimentation; sedimentation rates; stratigraphy; United States; upper Holocene; X-ray fluorescence DO - http://dx.doi.org/10.1016/j.quaint.2015.01.179 ER - TY - JOUR T1 - Holocene history of Mono Lake, California, USA, from multiple sediment cores AN - 1832594878; 771784-79 JF - Quaternary International AU - Zimmerman, Susan R AU - Starratt, Scott W AU - Hemming, Sidney R AU - St-Jacques, Jeannine-Marie Y1 - 2015/11/11/ PY - 2015 DA - 2015 Nov 11 SP - 150 PB - Elsevier, Oxford VL - 387 SN - 1040-6182, 1040-6182 KW - United States KW - lake-level changes KW - Quaternary KW - Mono County California KW - Holocene KW - cores KW - Cenozoic KW - California KW - tephrostratigraphy KW - Mono Lake KW - sedimentology KW - geochemistry KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832594878?accountid=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=Quaternary+International&rft.atitle=Holocene+history+of+Mono+Lake%2C+California%2C+USA%2C+from+multiple+sediment+cores&rft.au=Zimmerman%2C+Susan+R%3BStarratt%2C+Scott+W%3BHemming%2C+Sidney+R%3BSt-Jacques%2C+Jeannine-Marie&rft.aulast=Zimmerman&rft.aufirst=Susan&rft.date=2015-11-11&rft.volume=387&rft.issue=&rft.spage=150&rft.isbn=&rft.btitle=&rft.title=Quaternary+International&rft.issn=10406182&rft_id=info:doi/10.1016%2Fj.quaint.2015.01.190 L2 - http://www.sciencedirect.com/science/journal/10406182 LA - English DB - GeoRef N1 - Conference title - Pacific climate workshop, 26th meeting 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 - 2 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - California; Cenozoic; cores; geochemistry; Holocene; lake-level changes; Mono County California; Mono Lake; Quaternary; sedimentology; tephrostratigraphy; United States DO - http://dx.doi.org/10.1016/j.quaint.2015.01.190 ER - TY - JOUR T1 - A 1500 year record of hydrologic variability in the northwestern Great Basin from sediments in Big Soda Lake, Churchill County, Nevada AN - 1832594596; 771784-55 JF - Quaternary International AU - Reidy, Liam AU - Byrne, Roger AU - Ingram, Lynn AU - Rosen, Michael AU - Zimmerman, Susan AU - Reheis, Marith AU - Starratt, Scott W AU - St-Jacques, Jeannine-Marie Y1 - 2015/11/11/ PY - 2015 DA - 2015 Nov 11 SP - 143 PB - Elsevier, Oxford VL - 387 SN - 1040-6182, 1040-6182 KW - United States KW - hydrology KW - Churchill County Nevada KW - North America KW - lake-level changes KW - Big Soda Lake KW - Quaternary KW - oxygen KW - Basin and Range Province KW - X-ray fluorescence KW - isotopes KW - Great Basin KW - paleoclimatology KW - Holocene KW - stable isotopes KW - Cenozoic KW - chronology KW - Neoglacial KW - O-18 KW - upper Holocene KW - Nevada KW - Medieval Warm Period KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832594596?accountid=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=Quaternary+International&rft.atitle=A+1500+year+record+of+hydrologic+variability+in+the+northwestern+Great+Basin+from+sediments+in+Big+Soda+Lake%2C+Churchill+County%2C+Nevada&rft.au=Reidy%2C+Liam%3BByrne%2C+Roger%3BIngram%2C+Lynn%3BRosen%2C+Michael%3BZimmerman%2C+Susan%3BReheis%2C+Marith%3BStarratt%2C+Scott+W%3BSt-Jacques%2C+Jeannine-Marie&rft.aulast=Reidy&rft.aufirst=Liam&rft.date=2015-11-11&rft.volume=387&rft.issue=&rft.spage=143&rft.isbn=&rft.btitle=&rft.title=Quaternary+International&rft.issn=10406182&rft_id=info:doi/10.1016%2Fj.quaint.2015.01.166 L2 - http://www.sciencedirect.com/science/journal/10406182 LA - English DB - GeoRef N1 - Conference title - Pacific climate workshop, 26th meeting 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 - Basin and Range Province; Big Soda Lake; Cenozoic; chronology; Churchill County Nevada; Great Basin; Holocene; hydrology; isotopes; lake sediments; lake-level changes; Medieval Warm Period; Neoglacial; Nevada; North America; O-18; oxygen; paleoclimatology; Quaternary; stable isotopes; United States; upper Holocene; X-ray fluorescence DO - http://dx.doi.org/10.1016/j.quaint.2015.01.166 ER - TY - JOUR T1 - Validation of Attenuation Models for Ground Motion Applications in Central and Eastern North America AN - 1811892388; PQ0003526267 AB - Recently developed attenuation models are incorporated into standard one-dimensional (1-D) ground motion prediction equations (GMPEs), effectively making them two-dimensional (2-D) and eliminating the need to create different GMPEs for an increasing number of sub-regions. The model is tested against a data set of over 10,000 recordings from 81 earthquakes in North America. The use of attenuation models in GMPEs improves our ability to fit observed ground motions and should be incorporated into future national hazard maps. The improvement is most significant at higher frequencies and longer distances which have a greater number of wave cycles. This has implications for the rare high-magnitude earthquakes, which produce potentially damaging ground motions over wide areas, and drive the seismic hazards. Because the attenuation models can be created using weak ground motions, they could be developed for regions of low seismicity where empirical recordings of ground motions are uncommon and do not span the full range of magnitudes and distances. JF - Earthquake Spectra AU - Pasyanos, Michael AD - Lawrence Livermore National Laboratory, 7000 East Ave., L-046, Livermore, CA 94550 Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 2281 EP - 2300 PB - Earthquake Engineering Research Institute, 499 14th Street Oakland, CA 94612-1934 United States VL - 31 IS - 4 SN - 8755-2930, 8755-2930 KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts KW - Prediction KW - Earthquakes KW - North America KW - Ground motion KW - Seismic activity KW - Waves KW - Recording KW - Seismicity KW - M2 551.5:General (551.5) KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1811892388?accountid=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=Earthquake+Spectra&rft.atitle=Validation+of+Attenuation+Models+for+Ground+Motion+Applications+in+Central+and+Eastern+North+America&rft.au=Pasyanos%2C+Michael&rft.aulast=Pasyanos&rft.aufirst=Michael&rft.date=2015-11-01&rft.volume=31&rft.issue=4&rft.spage=2281&rft.isbn=&rft.btitle=&rft.title=Earthquake+Spectra&rft.issn=87552930&rft_id=info:doi/10.1193%2F052714EQS074M LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-09-01 N1 - SubjectsTermNotLitGenreText - Earthquakes; Seismicity; Prediction; Ground motion; Seismic activity; Waves; Recording; North America DO - http://dx.doi.org/10.1193/052714EQS074M ER - TY - JOUR T1 - Evidence for long-lived subduction of an ancient tectonic plate beneath the southern Indian Ocean AN - 1808377146; PQ0002797137 AB - Ancient subducted tectonic plates have been observed in past seismic images of the mantle beneath North America and Eurasia, and it is likely that other ancient slab structures have remained largely hidden, particularly in the seismic-data-limited regions beneath the vast oceans in the Southern Hemisphere. Here we present a new global tomographic image, which shows a slab-like structure beneath the southern Indian Ocean with coherency from the upper mantle to the core-mantle boundary region-a feature that has never been identified. We postulate that the structure is an ancient tectonic plate that sank into the mantle along an extensive intraoceanic subduction zone that migrated southwestward across the ancient Tethys Ocean in the Mesozoic Era. Slab material still trapped in the transition zone is positioned near the edge of East Gondwana at 140Ma suggesting that subduction terminated near the margin of the ancient continent prior to breakup and subsequent dispersal of its subcontinents. Key Points * Seismic tomography of the mantle has uncovered a subducted slab beneath the southern Indian Ocean * The subduction event is significant to past plate tectonic history * Subducted slabs can subsist in the shallow mantle much longer than previously realized JF - Geophysical Research Letters AU - Simmons, NA AU - Myers, S C AU - Johannesson, G AU - Matzel, E AU - Grand, S P AD - Geophysical Monitoring Programs, Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 9270 EP - 9278 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 42 IS - 21 SN - 0094-8276, 0094-8276 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Plate tectonics KW - Biological surveys KW - Upper mantle KW - ISW, Indian Ocean KW - North America KW - Slabs KW - Subduction KW - Transition Zone KW - PNE, Eurasia KW - Mesozoic KW - Subduction zones KW - Oceans KW - Boundaries KW - Tectonics KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808377146?accountid=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=Evidence+for+long-lived+subduction+of+an+ancient+tectonic+plate+beneath+the+southern+Indian+Ocean&rft.au=Simmons%2C+NA%3BMyers%2C+S+C%3BJohannesson%2C+G%3BMatzel%2C+E%3BGrand%2C+S+P&rft.aulast=Simmons&rft.aufirst=NA&rft.date=2015-11-01&rft.volume=42&rft.issue=21&rft.spage=9270&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2015GL066237 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Upper mantle; Biological surveys; Plate tectonics; Subduction zones; Subduction; Mesozoic; Tectonics; Slabs; Oceans; Boundaries; Transition Zone; North America; ISW, Indian Ocean; PNE, Eurasia DO - http://dx.doi.org/10.1002/2015GL066237 ER - TY - JOUR T1 - Time Evolving Fission Chain Theory and Fast Neutron and Gamma-Ray Counting Distributions AN - 1793252019; PQ0002657728 AB - We solve a simple theoretical model of time evolving fission chains due to Feynman that generalizes and asymptotically approaches the point model theory. The point model theory has been used to analyze thermal neutron counting data. This extension of the theory underlies fast counting data for both neutrons and gamma rays from metal systems. Fast neutron and gamma-ray counting is now possible using liquid scintillator arrays with nanosecond time resolution. For individual fission chains, the differential equations describing three correlated probability distributions are solved: the time-dependent internal neutron population, accumulation of fissions in time, and accumulation of leaked neutrons in time. Explicit analytic formulas are given for correlated moments of the time evolving chain populations. The equations for random time gate fast neutron and gamma-ray counting distributions, due to randomly initiated chains, are presented. Correlated moment equations are given for both random time gate and triggered time gate counting. Explicit formulas for all correlated moments are given up to triple order, for all combinations of correlated fast neutrons and gamma rays. The nonlinear differential equations for probabilities for time-dependent fission chain populations have a remarkably simple Monte Carlo realization. A Monte Carlo code was developed for this theory and is shown to statistically realize the solutions to the fission chain theory probability distributions. Combined with random initiation of chains and detection of external quanta, the Monte Carlo code generates time tagged data for neutron and gamma-ray counting and from these data the counting distributions. JF - Nuclear Science and Engineering AU - Kim, K S AU - Nakae, L F AU - Prasad, M K AU - Snyderman, N J AU - Verbeke, J M AD - Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550 kim27@llnl.gov Y1 - 2015/11// PY - 2015 DA - November 2015 SP - 225 EP - 271 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 - Chains KW - Mathematical models KW - Fast neutrons KW - Gamma rays KW - Correlation KW - Counting KW - Molecular conformation KW - Fission UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793252019?accountid=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=Time+Evolving+Fission+Chain+Theory+and+Fast+Neutron+and+Gamma-Ray+Counting+Distributions&rft.au=Kim%2C+K+S%3BNakae%2C+L+F%3BPrasad%2C+M+K%3BSnyderman%2C+N+J%3BVerbeke%2C+J+M&rft.aulast=Kim&rft.aufirst=K&rft.date=2015-11-01&rft.volume=181&rft.issue=3&rft.spage=225&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/10.13182%2FNSE14-120 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-06-01 N1 - Number of references - 21 N1 - Last updated - 2016-06-02 DO - http://dx.doi.org/10.13182/NSE14-120 ER - TY - JOUR T1 - Large-scale 3D geoelectromagnetic modeling using parallel adaptive high-order finite element method AN - 1739081860; 2015-115120 AB - We have investigated the use of the adaptive high-order finite-element method (FEM) for geoelectromagnetic modeling. Because high-order FEM is challenging from the numerical and computational points of view, most published finite-element studies in geoelectromagnetics use the lowest order formulation. Solution of the resulting large system of linear equations poses the main practical challenge. We have developed a fully parallel and distributed robust and scalable linear solver based on the optimal block-diagonal and auxiliary space preconditioners. The solver was found to be efficient for high finite element orders, unstructured and nonconforming locally refined meshes, a wide range of frequencies, large conductivity contrasts, and number of degrees of freedom (DoFs). Furthermore, the presented linear solver is in essence algebraic; i.e., it acts on the matrix-vector level and thus requires no information about the discretization, boundary conditions, or physical source used, making it readily efficient for a wide range of electromagnetic modeling problems. To get accurate solutions at reduced computational cost, we have also implemented goal-oriented adaptive mesh refinement. The numerical tests indicated that if highly accurate modeling results were required, the high-order FEM in combination with the goal-oriented local mesh refinement required less computational time and DoFs than the lowest order adaptive FEM. JF - Geophysics AU - Grayver, Alexander V AU - Kolev, Tzanio V Y1 - 2015/11// PY - 2015 DA - November 2015 SP - E277 EP - E291 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 80 IS - 6 SN - 0016-8033, 0016-8033 KW - numerical models KW - genetic algorithms KW - three-dimensional models KW - numerical analysis KW - geophysical methods KW - data processing KW - equations KW - magnetotelluric methods KW - finite element analysis KW - computers KW - mathematical methods KW - electromagnetic methods KW - algorithms KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739081860?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Large-scale+3D+geoelectromagnetic+modeling+using+parallel+adaptive+high-order+finite+element+method&rft.au=Grayver%2C+Alexander+V%3BKolev%2C+Tzanio+V&rft.aulast=Grayver&rft.aufirst=Alexander&rft.date=2015-11-01&rft.volume=80&rft.issue=6&rft.spage=E277&rft.isbn=&rft.btitle=&rft.title=Geophysics&rft.issn=00168033&rft_id=info:doi/10.1190%2Fgeo2015-0013.1 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. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-12-04 N1 - CODEN - GPYSA7 N1 - SubjectsTermNotLitGenreText - algorithms; computers; data processing; electromagnetic methods; equations; finite element analysis; genetic algorithms; geophysical methods; magnetotelluric methods; mathematical methods; numerical analysis; numerical models; three-dimensional models DO - http://dx.doi.org/10.1190/geo2015-0013.1 ER - TY - JOUR T1 - On the impact of temperatures up to 200 degrees C in clay repositories with bentonite engineer barrier systems; a study with coupled thermal, hydrological, chemical, and mechanical modeling AN - 1789753197; 2016-044044 AB - One of the most important design variables for a geological nuclear waste repository is the temperature limit up to which the engineered barrier system (EBS) and the natural geologic environment can be exposed. Up to now, almost all design concepts that involve bentonite-backfilled emplacement tunnels have chosen a maximum allowable temperature of about 100 degrees C. Such a choice is largely based on the consideration that in clay-based materials illitization and the associated mechanical changes in the bentonite (and perhaps the clay host rock) could affect the barrier attributes of the EBS. However, existing experimental and modeling studies on the occurrence of illitization and related performance impacts are not conclusive, in part because the relevant couplings between the thermal, hydrological, chemical, and mechanical (THMC) processes have not been fully represented in the models. This paper presents a fully coupled THMC simulation of a nuclear waste repository in a clay formation with a bentonite-backfilled EBS for 1000 years. Two scenarios were simulated for comparison: a case in which the temperature in the bentonite near the waste canister can reach about 200 degrees C and a case in which the temperature in the bentonite near the waste canister peaks at about 100 degrees C. The model simulations demonstrate some degree of illitization in both the bentonite buffer and the surrounding clay formation. Other chemical alterations include the dissolution of K-feldspar and calcite, and precipitation of quartz, chlorite, and kaolinite. In general, illitization in the bentonite and the clay formation is enhanced at higher temperature. However, the quantity of illitization is affected by many chemical factors and therefore varies a great deal. The most important chemical factors are the concentration of K in the pore water as well as the abundance and dissolution rate of K-feldspar; less important ones are the concentration of sodium and the quartz precipitation rate. In our modeling scenarios, the calculated decrease in smectite volume fraction in bentonite ranges from 1 to 8% of the initial volume fraction of smectite in the 100 degrees C scenario and 1-27% in the 200 degrees C scenario. Chemical changes in the 200 degrees C scenario could also lead to a reduction in swelling stress up to 15-18% whereas those in the 100 degrees C scenario result in about 14-15% reduction in swelling stress for the base case scenario. Model results also show that the 200 degrees C scenario results in a much higher total stress than the 100 degrees C scenario, mostly due to thermal pressurization. While cautions should be taken regarding the model results due to some limitations in the models, the modeling work is illustrative in light of the relative importance of different processes occurring in EBS bentonite and clay formation at higher than 100 degrees C conditions, and could be of greater use when site specific data are available. Abstract Copyright (2015) Elsevier, B.V. JF - Engineering Geology AU - Zheng, Liange AU - Rutqvist, Jonny AU - Birkholzer, Jens T AU - Liu, Hui-Hai Y1 - 2015/10/30/ PY - 2015 DA - 2015 Oct 30 SP - 278 EP - 295 PB - Elsevier, Amsterdam VL - 197 SN - 0013-7952, 0013-7952 KW - hydrology KW - clay KW - soil mechanics KW - expansion KW - bentonite KW - engineering properties KW - clastic sediments KW - coupling KW - mechanical properties KW - simulation KW - temperature KW - sedimentary rocks KW - sediments KW - waste disposal KW - thermal effects KW - geochemistry KW - clastic rocks KW - high temperature KW - disposal barriers KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789753197?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=On+the+impact+of+temperatures+up+to+200+degrees+C+in+clay+repositories+with+bentonite+engineer+barrier+systems%3B+a+study+with+coupled+thermal%2C+hydrological%2C+chemical%2C+and+mechanical+modeling&rft.au=Zheng%2C+Liange%3BRutqvist%2C+Jonny%3BBirkholzer%2C+Jens+T%3BLiu%2C+Hui-Hai&rft.aulast=Zheng&rft.aufirst=Liange&rft.date=2015-10-30&rft.volume=197&rft.issue=&rft.spage=278&rft.isbn=&rft.btitle=&rft.title=Engineering+Geology&rft.issn=00137952&rft_id=info:doi/10.1016%2Fj.enggeo.2015.08.026 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 - 60 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2016-05-19 N1 - CODEN - EGGOAO N1 - SubjectsTermNotLitGenreText - bentonite; clastic rocks; clastic sediments; clay; coupling; disposal barriers; engineering properties; expansion; geochemistry; high temperature; hydrology; mechanical properties; sedimentary rocks; sediments; simulation; soil mechanics; temperature; thermal effects; waste disposal DO - http://dx.doi.org/10.1016/j.enggeo.2015.08.026 ER - TY - JOUR T1 - Accuracy and convergence properties of the fixed-stress iterative solution of two-way coupled poromechanics AN - 1756504193; 2016-007334 AB - This paper deals with the numerical solution of Biot's equations of coupled consolidation obtained by a mixed formulation combining continuous Galerkin finite-element and multipoint flux approximation finite-volume methods. The solution algorithm relies on the recently developed fixed-stress solution scheme, in which first the flow problem and then the mechanical one are addressed iteratively. We show that the algorithm can be interpreted as a particular block triangular preconditioning strategy applied within a Richardson iteration. The key component to the success of the preconditioner is the sparse approximation to the Schur complement based on a pressure space mass matrix scaled by a weighting factor that depends element-wise on the inverse of a suitable bulk modulus. The accuracy of the method is assessed, making use of well-known analytical solutions from the literature. Numerical results demonstrate robustness and low computational cost of the fixed-stress scheme in accurately capturing the two-way coupling between deformation and pressure. Copyright Copyright 2015 John Wiley & Sons, Ltd. JF - International Journal for Numerical and Analytical Methods in Geomechanics AU - Castelletto, N AU - White, J A AU - Tchelepi, H A Y1 - 2015/10/10/ PY - 2015 DA - 2015 Oct 10 SP - 1593 EP - 1618 PB - Wiley, Chichester VL - 39 IS - 14 SN - 0363-9061, 0363-9061 KW - soil mechanics KW - Galerkin method KW - Poisson's ratio KW - numerical models KW - stress KW - stiffness KW - fluid flow KW - porous materials KW - mechanical properties KW - elastic constants KW - bulk modulus KW - finite element analysis KW - heterogeneous materials KW - Biot theory KW - isotropy KW - half-space KW - consolidation KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756504193?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.atitle=Accuracy+and+convergence+properties+of+the+fixed-stress+iterative+solution+of+two-way+coupled+poromechanics&rft.au=Castelletto%2C+N%3BWhite%2C+J+A%3BTchelepi%2C+H+A&rft.aulast=Castelletto&rft.aufirst=N&rft.date=2015-10-10&rft.volume=39&rft.issue=14&rft.spage=1593&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.issn=03639061&rft_id=info:doi/10.1002%2Fnag.2400 L2 - http://www3.interscience.wiley.com/journal/3312/home 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 - 55 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2016-01-14 N1 - SubjectsTermNotLitGenreText - Biot theory; bulk modulus; consolidation; elastic constants; finite element analysis; fluid flow; Galerkin method; half-space; heterogeneous materials; isotropy; mechanical properties; numerical models; Poisson's ratio; porous materials; soil mechanics; stiffness; stress DO - http://dx.doi.org/10.1002/nag.2400 ER - TY - JOUR T1 - Long-Period Ground Motion in the Arabian Gulf from Earthquakes in the Zagros Mountains Thrust Belt AN - 1808382157; PQ0002145883 AB - The Arabian Gulf is adjacent to the Zagros Mountains, one of the most seismically active regions in the world. We observe that broadband seismic records of Zagros earthquakes recorded on the Arabian side of the Gulf display long-duration surface waves. While shorter periods (10 km) of the Gulf basin, the long-period energy is enhanced and transmitted efficiently. Consequently, large earthquakes in the Zagros could result in amplified ground motions at long periods (2-10 s) relative to average behavior. Such ground motions are of concern for large engineered structures, such as tall buildings and long bridges with resonant periods in the same period range. Here we present results of investigations of the characteristics of ground motions recorded on the western shore of the Gulf from selected earthquakes in the Zagros Mountains region. Exceptionally, long-duration seismic waves, as compared with standard models, are shown to occur with periods of 2-10 s. This may be due to waveguide effects in the deep sedimentary basin structure of the Arabian Platform. In addition to analyzing recorded ground motion we performed 3D wave propagation simulations using a finite difference method and experimental velocity models of the Gulf, with different shallow sedimentary layers structures. The simulation results confirm our hypothesis that long-period waves with extremely long duration and relatively large amplitudes are caused by the geometry of the basin sedimentary layers and, to some extent, by shallow earthquake depths. Combined effects of basin edge geometry with sharp velocity contrasts and shallow sources (<10 km) on the eastern side of the Arabian Gulf can cause large long-period ground motion on the western side of the Gulf. In contrast, the short-period content of ground motion (<2 s) at long distances is relatively weak. This is mainly due to wave propagation scattering and attenuation in the shallow sedimentary layers of the Gulf basin. JF - Pure and Applied Geophysics AU - Pitarka, Arben AU - Al-Amri, Abdullah AU - Pasyanos, Michael E AU - Rodgers, Arthur J AU - Mellors, Robert J AD - Atmospheric, Earth and Energy Division, Lawrence Livermore National Laboratory, 7000 East Avenue, L-046, P.O. Box 808, Livermore, CA, 94551, USA, pitarka1@llnl.gov Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 2517 EP - 2532 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 172 IS - 10 SN - 0033-4553, 0033-4553 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Sedimentary Basins KW - Earthquakes KW - Ground motion KW - Simulation Analysis KW - Basins KW - Velocity KW - Seismograms KW - Gulfs KW - Wave propagation KW - Sedimentary basins KW - Sediments KW - Mountains KW - Wave Propagation KW - Waves KW - Finite difference method KW - Modelling KW - Wave effects KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808382157?accountid=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=Pure+and+Applied+Geophysics&rft.atitle=Long-Period+Ground+Motion+in+the+Arabian+Gulf+from+Earthquakes+in+the+Zagros+Mountains+Thrust+Belt&rft.au=Pitarka%2C+Arben%3BAl-Amri%2C+Abdullah%3BPasyanos%2C+Michael+E%3BRodgers%2C+Arthur+J%3BMellors%2C+Robert+J&rft.aulast=Pitarka&rft.aufirst=Arben&rft.date=2015-10-01&rft.volume=172&rft.issue=10&rft.spage=2517&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-014-0858-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Earthquakes; Ground motion; Seismograms; Finite difference method; Sedimentary basins; Wave propagation; Sediments; Wave effects; Modelling; Sedimentary Basins; Wave Propagation; Mountains; Simulation Analysis; Velocity; Basins; Waves; Gulfs DO - http://dx.doi.org/10.1007/s00024-014-0858-z ER - TY - JOUR T1 - Transposon Mutagenesis Paired with Deep Sequencing of Caulobacter crescentus under Uranium Stress Reveals Genes Essential for Detoxification and Stress Tolerance. AN - 1709397024; 26195598 AB - UNLABELLEDThe ubiquitous aquatic bacterium Caulobacter crescentus is highly resistant to uranium (U) and facilitates U biomineralization and thus holds promise as an agent of U bioremediation. To gain an understanding of how C. crescentus tolerates U, we employed transposon (Tn) mutagenesis paired with deep sequencing (Tn-seq) in a global screen for genomic elements required for U resistance. Of the 3,879 annotated genes in the C. crescentus genome, 37 were found to be specifically associated with fitness under U stress, 15 of which were subsequently tested through mutational analysis. Systematic deletion analysis revealed that mutants lacking outer membrane transporters (rsaFa and rsaFb), a stress-responsive transcription factor (cztR), or a ppGpp synthetase/hydrolase (spoT) exhibited a significantly lower survival rate under U stress. RsaFa and RsaFb, which are homologues of TolC in Escherichia coli, have previously been shown to mediate S-layer export. Transcriptional analysis revealed upregulation of rsaFa and rsaFb by 4- and 10-fold, respectively, in the presence of U. We additionally show that rsaFa mutants accumulated higher levels of U than the wild type, with no significant increase in oxidative stress levels. Our results suggest a function for RsaFa and RsaFb in U efflux and/or maintenance of membrane integrity during U stress. In addition, we present data implicating CztR and SpoT in resistance to U stress. Together, our findings reveal novel gene targets that are key to understanding the molecular mechanisms of U resistance in C. crescentus.IMPORTANCECaulobacter crescentus is an aerobic bacterium that is highly resistant to uranium (U) and has great potential to be used in U bioremediation, but its mechanisms of U resistance are poorly understood. We conducted a Tn-seq screen to identify genes specifically required for U resistance in C. crescentus. The genes that we identified have previously remained elusive using other omics approaches and thus provide significant insight into the mechanisms of U resistance by C. crescentus. In particular, we show that outer membrane transporters RsaFa and RsaFb, previously known as part of the S-layer export machinery, may confer U resistance by U efflux and/or by maintaining membrane integrity during U stress. JF - Journal of bacteriology AU - Yung, Mimi C AU - Park, Dan M AU - Overton, K Wesley AU - Blow, Matthew J AU - Hoover, Cindi A AU - Smit, John AU - Murray, Sean R AU - Ricci, Dante P AU - Christen, Beat AU - Bowman, Grant R AU - Jiao, Yongqin AD - Biosciences and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA. ; DOE Joint Genome Institute, Walnut Creek, California, USA. ; Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada. ; Department of Biology, California State University Northridge, Northridge, California, USA. ; Department of Developmental Biology, Stanford University School of Medicine, Stanford, California, USA. ; Institute of Molecular Systems Biology, ETH Zürich, Zürich, Switzerland. ; Department of Molecular Biology, University of Wyoming, Laramie, Wyoming, USA. ; Biosciences and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA jiao1@llnl.gov. Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 3160 EP - 3172 VL - 197 IS - 19 KW - Bacterial Outer Membrane Proteins KW - 0 KW - DNA Transposable Elements KW - DNA, Bacterial KW - Uranium KW - 4OC371KSTK KW - Index Medicus KW - Genome, Bacterial KW - DNA, Bacterial -- genetics KW - Bacterial Outer Membrane Proteins -- genetics KW - Gene Expression Regulation, Bacterial -- physiology KW - Bacterial Outer Membrane Proteins -- metabolism KW - Transcriptome KW - Mutagenesis KW - Caulobacter crescentus -- genetics KW - Stress, Physiological -- drug effects KW - Caulobacter crescentus -- metabolism KW - DNA Transposable Elements -- genetics KW - Uranium -- toxicity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709397024?accountid=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+bacteriology&rft.atitle=Transposon+Mutagenesis+Paired+with+Deep+Sequencing+of+Caulobacter+crescentus+under+Uranium+Stress+Reveals+Genes+Essential+for+Detoxification+and+Stress+Tolerance.&rft.au=Yung%2C+Mimi+C%3BPark%2C+Dan+M%3BOverton%2C+K+Wesley%3BBlow%2C+Matthew+J%3BHoover%2C+Cindi+A%3BSmit%2C+John%3BMurray%2C+Sean+R%3BRicci%2C+Dante+P%3BChristen%2C+Beat%3BBowman%2C+Grant+R%3BJiao%2C+Yongqin&rft.aulast=Yung&rft.aufirst=Mimi&rft.date=2015-10-01&rft.volume=197&rft.issue=19&rft.spage=3160&rft.isbn=&rft.btitle=&rft.title=Journal+of+bacteriology&rft.issn=1098-5530&rft_id=info:doi/10.1128%2FJB.00382-15 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-12-29 N1 - Date created - 2015-09-02 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Mol Microbiol. 2011 May;80(3):695-714 [21338423] Nucleic Acids Res. 2013 Jul;41(Web Server issue):W29-33 [23609542] Proc Natl Acad Sci U S A. 2011 Sep 13;108(37):15248-52 [21896750] PLoS One. 2014;9(2):e89863 [24587082] Mol Microbiol. 2014 Feb;91(3):508-21 [24330203] J Proteome Res. 2014 Apr 4;13(4):1833-47 [24555639] Ecotoxicology. 2014 May;23(4):726-33 [24510447] Bioinformatics. 2014 Aug 1;30(15):2114-20 [24695404] Appl Environ Microbiol. 2014 Aug;80(16):4795-804 [24878600] MBio. 2014;5(4). pii: e01385-14. doi: 10.1128/mBio.01385-14 [25139902] Appl Environ Microbiol. 2014 Sep;80(18):5680-8 [25002429] PLoS One. 2014;9(8):e102447 [25157416] Mol Microbiol. 2014 Sep;93(6):1284-301 [25069588] Antimicrob Agents Chemother. 2014 Oct;58(10):6165-71 [25114134] PLoS Negl Trop Dis. 2014 Oct;8(10):e3216 [25340818] Clin Microbiol Rev. 2015 Apr;28(2):337-418 [25788514] Environ Microbiol. 2015 Jun;17(6):2064-75 [25580878] Proc Natl Acad Sci U S A. 2001 Mar 27;98(7):4136-41 [11259647] ScientificWorldJournal. 2002 Mar 15;2:707-29 [12805996] FEMS Microbiol Rev. 2003 Jun;27(2-3):313-39 [12829273] Annu Rev Biochem. 2004;73:467-89 [15189150] Gene. 1987;57(2-3):239-46 [3319780] Methods Enzymol. 1991;204:372-84 [1658564] J Bacteriol. 1994 Oct;176(20):6404-6 [7929014] Proc Natl Acad Sci U S A. 1996 Feb 6;93(3):1210-4 [8577742] J Bacteriol. 1998 Jun;180(12):3062-9 [9620954] Appl Microbiol Biotechnol. 1999 Jun;51(6):730-50 [10422221] J Bacteriol. 2004 Dec;186(23):8000-9 [15547272] Appl Environ Microbiol. 2005 Sep;71(9):5532-43 [16151146] FEMS Microbiol Lett. 2005 Oct 15;251(2):289-95 [16168577] PLoS Biol. 2005 Oct;3(10):e334 [16176121] Appl Environ Microbiol. 2005 Nov;71(11):7453-60 [16269787] Mol Syst Biol. 2011;7:528 [21878915] Trends Microbiol. 2006 Jan;14(1):45-54 [16343907] PLoS Biol. 2006 Sep;4(9):e268 [16875436] BMC Microbiol. 2007;7:16 [17346345] Appl Environ Microbiol. 2007 Dec;73(23):7615-21 [17905881] Curr Pharm Biotechnol. 2008 Feb;9(1):9-15 [18289052] J Bacteriol. 2008 Oct;190(20):6867-80 [18723629] Plant Physiol Biochem. 2008 Nov;46(11):987-96 [18640846] Nat Rev Microbiol. 2008 Dec;6(12):893-903 [18997824] Bioinformatics. 2009 Jul 15;25(14):1754-60 [19451168] Nat Methods. 2009 Oct;6(10):767-72 [19767758] Microbiology. 2010 Mar;156(Pt 3):609-43 [20019082] BMC Biol. 2010;8:49 [20409324] Mol Microbiol. 2010 Aug;77(3):743-54 [20545840] FEMS Microbiol Lett. 2010 Oct;311(2):185-92 [20735480] J Bacteriol. 2010 Oct;192(20):5480-8 [20709896] Res Microbiol. 2010 Nov;161(9):765-71 [20863883] MBio. 2011;2(1):e00315-10 [21253457] J Hazard Mater. 2011 Dec 15;197:1-10 [22019055] PLoS Genet. 2011 Nov;7(11):e1002385 [22125499] J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(4):622-37 [22375546] PLoS One. 2012;7(8):e43012 [22900082] Nat Methods. 2012 Jul;9(7):671-5 [22930834] Arch Microbiol. 2012 Oct;194(10):865-77 [22588222] Proc Natl Acad Sci U S A. 2012 Oct 9;109(41):16702-7 [23010932] Genome Res. 2012 Dec;22(12):2541-51 [22826510] PLoS One. 2012;7(12):e51783 [23251623] J Bacteriol. 2013 Mar;195(5):1042-50 [23264577] BMC Microbiol. 2013;13:79 [23578014] J Bacteriol. 2005 Dec;187(24):8437-49 [16321948] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1128/JB.00382-15 ER - TY - JOUR T1 - Analysis of ground motion from an underground chemical explosion AN - 1718054545; 2015-094182 AB - We investigate the excitation and propagation of far-field seismic waves from the 905 kg trinitrotoluene equivalent underground chemical explosion SPE-3 recorded during the Source Physics Experiment (SPE) at the Nevada National Security Site. The recorded far-field ground motion at short and long distances is characterized by substantial shear-wave energy, and large azimuthal variations in P- and S-wave amplitudes. The shear waves observed on the transverse component of sensors at epicentral distances <50 m suggests they were generated at or very near the source. The relative amplitude of the shear waves grows as the waves propagate away from the source. We analyze and model the shear-wave excitation during the explosion in the 0.01-10 Hz frequency range, at epicentral distances of up to 1 km. We used two simulation techniques. One is based on the empirical isotropic Mueller-Murphy (MM) (Mueller and Murphy, 1971) nuclear explosion source model, and 3D anelastic wave propagation modeling. The second uses a physics-based approach that couples hydrodynamic modeling of the chemical explosion source with anelastic wave propagation modeling. Comparisons with recorded data show the MM source model overestimates the SPE-3 far-field ground motion by an average factor of 4. The observations show that shear waves with substantial high-frequency energy were generated at the source. However, to match the observations additional shear waves from scattering, including surface topography, and heterogeneous shallow structure contributed to the amplification of far-field shear motion. Comparisons between empirically based isotropic and physics-based anisotropic source models suggest that both wave-scattering effects and near-field nonlinear effects are needed to explain the amplitude and irregular radiation pattern of shear motion observed during the SPE-3 explosion. JF - Bulletin of the Seismological Society of America AU - Pitarka, Arben AU - Mellors, Robert J AU - Walter, William R AU - Ezzedine, Souheil AU - Vorobiev, Oleg AU - Antoun, Tarabay AU - Wagoner, Jeffery L AU - Matzel, Eric M AU - Ford, Sean R AU - Rodgers, Arthur J AU - Glenn, Lewis AU - Pasyanos, Mike Y1 - 2015/09/08/ PY - 2015 DA - 2015 Sep 08 SP - 2390 EP - 2410 PB - Seismological Society of America, Berkeley, CA VL - 105 IS - 5 SN - 0037-1106, 0037-1106 KW - United States KW - P-waves KW - body waves KW - underground space KW - explosions KW - chemical explosions KW - elastic waves KW - depth KW - models KW - Source Physics Experiment KW - Nevada National Security Site KW - seismicity KW - ground motion KW - seismic waves KW - earthquakes KW - S-waves KW - Nevada KW - anisotropy KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054545?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Analysis+of+ground+motion+from+an+underground+chemical+explosion&rft.au=Pitarka%2C+Arben%3BMellors%2C+Robert+J%3BWalter%2C+William+R%3BEzzedine%2C+Souheil%3BVorobiev%2C+Oleg%3BAntoun%2C+Tarabay%3BWagoner%2C+Jeffery+L%3BMatzel%2C+Eric+M%3BFord%2C+Sean+R%3BRodgers%2C+Arthur+J%3BGlenn%2C+Lewis%3BPasyanos%2C+Mike&rft.aulast=Pitarka&rft.aufirst=Arben&rft.date=2015-09-08&rft.volume=105&rft.issue=5&rft.spage=2390&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150066 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 - 37 N1 - PubXState - CA N1 - Document feature - illus. incl. 3 tables, geol. sketch maps N1 - Last updated - 2015-12-17 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - amplitude; anisotropy; body waves; chemical explosions; depth; earthquakes; elastic waves; explosions; ground motion; models; Nevada; Nevada National Security Site; P-waves; S-waves; seismic waves; seismicity; Source Physics Experiment; underground space; United States DO - http://dx.doi.org/10.1785/0120150066 ER - TY - JOUR T1 - Selective laser sintering of MA956 oxide dispersion strengthened steel AN - 1765958128; PQ0002503648 AB - Oxide Dispersion Strengthened (ODS) steels' qualities of radiation damage resistance and high strength at high temperature make them promising nuclear structural materials. However, the dispersed yttria that gives ODS steel its beneficial qualities are generally compromised during joining processes, making fabrication difficult and expensive. The selective laser sintering process offers a potential path through this barrier by which net-shape parts can feasibly be built via additive manufacturing without fully melting the structure. Rastering a 400 W laser over a 110 mu m MA956 ODS steel powder bed, we additively built parts with varying build conditions. Although density was achieved to within 97% of the wrought MA956, ultimate tensile strengths achieved only 65% of the wrought strength. Spectroscopy analysis points to the agglomeration of the yttria nano-particles as a possible explanation for the loss in strength. Further study might benefit from exploration of other parameters such as thinner powder build layers which would require less energy input to achieve sintering while minimizing time above the melting temperature. JF - Journal of Nuclear Materials AU - Hunt, Ryan M AU - Kramer, Kevin J AU - El-Dasher, Bassem AD - Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USA, hunt52@llnl.gov Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 80 EP - 85 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 464 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Ferritic stainless steels KW - Ferrous alloys KW - Superalloys KW - MA956 KW - Radiation KW - Energy KW - High temperature KW - Radioactive materials KW - Temperature KW - Lasers KW - Steel KW - Spectroscopy KW - Additives KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765958128?accountid=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=Selective+laser+sintering+of+MA956+oxide+dispersion+strengthened+steel&rft.au=Hunt%2C+Ryan+M%3BKramer%2C+Kevin+J%3BEl-Dasher%2C+Bassem&rft.aulast=Hunt&rft.aufirst=Ryan&rft.date=2015-09-01&rft.volume=464&rft.issue=&rft.spage=80&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2015.04.011 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Number of references - 7 N1 - Last updated - 2016-04-29 N1 - SubjectsTermNotLitGenreText - Radiation; High temperature; Energy; Radioactive materials; Temperature; Lasers; Steel; Spectroscopy; Additives DO - http://dx.doi.org/10.1016/j.jnucmat.2015.04.011 ER - TY - JOUR T1 - Cometary impact effects at the Moon; implications for lunar swirl formation AN - 1765869482; 2016-015870 JF - Icarus AU - Syal, Megan Bruck AU - Schultz, Peter H Y1 - 2015/09/01/ PY - 2015 DA - 2015 Sep 01 SP - 194 EP - 206 PB - Elsevier, New York, NY VL - 257 SN - 0019-1035, 0019-1035 KW - lunar swirls KW - cratering KW - cometary nucleus KW - albedo KW - Moon KW - magnetic anomalies KW - impacts KW - magnetic field KW - comae KW - models KW - brightness KW - volatiles KW - photometry KW - farside KW - comets KW - transient phenomena KW - surface features KW - velocity KW - heat transfer KW - cometary dust KW - regolith KW - backscattering KW - lunar soils KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765869482?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cometary+impact+effects+at+the+Moon%3B+implications+for+lunar+swirl+formation&rft.au=Syal%2C+Megan+Bruck%3BSchultz%2C+Peter+H&rft.aulast=Syal&rft.aufirst=Megan&rft.date=2015-09-01&rft.volume=257&rft.issue=&rft.spage=194&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2015.05.005 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 125 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-02-18 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - albedo; backscattering; brightness; comae; cometary dust; cometary nucleus; comets; cratering; farside; heat transfer; impacts; lunar soils; lunar swirls; magnetic anomalies; magnetic field; models; Moon; photometry; regolith; surface features; transient phenomena; velocity; volatiles DO - http://dx.doi.org/10.1016/j.icarus.2015.05.005 ER - TY - JOUR T1 - Evolution of fluid-rock interaction in the Reykjanes geothermal system, Iceland; evidence from Iceland Deep Drilling Project core RN-17B AN - 1729845630; 2015-107264 AB - We describe the lithology and present spatially resolved geochemical analyses of samples from the hydrothermally altered Iceland Deep Drilling Project (IDDP) drill core RN-17B. The 9.3 m long RN-17B core was collected from the seawater-dominated Reykjanes geothermal system, located on the Reykjanes Peninsula, Iceland. The nature of fluids and the location of the Reykjanes geothermal system make it a useful analog for seafloor hydrothermal processes, although there are important differences. The recovery of drill core from the Reykjanes geothermal system, as opposed to drill cuttings, has provided the opportunity to investigate evolving geothermal conditions by utilizing in-situ geochemical techniques in the context of observed paragenetic and spatial relationships of alteration minerals. The RN-17B core was returned from a vertical depth of approximately 2560 m and an in-situ temperature of approximately 345 degrees C. The primary lithologies are basaltic in composition and include hyaloclastite breccia, fine-grained volcanic sandstone, lithic breccia, and crystalline basalt. Primary igneous phases have been entirely pseudomorphed by calcic plagioclase + magnesium hornblende + chlorite + titanite + albitized plagioclase + vein epidote and sulfides. Despite the extensive hydrothermal metasomatism, original textures including hyaloclastite glass shards, lithic clasts, chilled margins, and shell-fragment molds are superbly preserved. Multi-collector LA-ICP-MS strontium isotope ratio ( (super 87) Sr/ (super 86) Sr) measurements of vein epidote from the core are consistent with seawater as the dominant recharge fluid. Epidote-hosted fluid inclusion homogenization temperature and freezing point depression measurements suggest that the RN-17B core records cooling through the two-phase boundary for seawater over time to current in-situ measured temperatures. Electron microprobe analyses of hydrothermal hornblende and hydrothermal plagioclase confirm that while alteration is of amphibolite-grade, it is in disequilibrium and the extent of alteration is dependent upon protolith type and water/rock ratio. Alteration in the RN-17B core bares many similarities to that of Type II basalts observed in Mid-Atlantic Ridge samples. Abstract Copyright (2015) Elsevier, B.V. JF - Journal of Volcanology and Geothermal Research AU - Fowler, Andrew P G AU - Zierenberg, Robert A AU - Schiffman, Peter AU - Marks, Naomi AU - Friethleifsson, Guethmundur Omar Y1 - 2015/09/01/ PY - 2015 DA - 2015 Sep 01 SP - 47 EP - 63 PB - Elsevier, Amsterdam VL - 302 SN - 0377-0273, 0377-0273 KW - sorosilicates KW - silicates KW - sea water KW - volcanic rocks KW - isotopes KW - igneous rocks KW - mass spectra KW - hyaloclastite KW - Reykjanes geothermal system KW - Europe KW - salinity KW - microthermometry KW - metasomatism KW - stable isotopes KW - cores KW - temperature KW - electron probe data KW - geothermal systems KW - epidote KW - water-rock interaction KW - inclusions KW - amphibolite facies KW - orthosilicates KW - cooling KW - hydrothermal alteration KW - spectra KW - Iceland Deep Drilling Project KW - alkaline earth metals KW - Western Europe KW - isotope ratios KW - depth KW - ICP mass spectra KW - Sr-87/Sr-86 KW - pyroclastics KW - metals KW - fluid inclusions KW - epidote group KW - Reykjanes Peninsula KW - Iceland KW - strontium KW - facies KW - 29A:Economic geology, geology of energy sources KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729845630?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Evolution+of+fluid-rock+interaction+in+the+Reykjanes+geothermal+system%2C+Iceland%3B+evidence+from+Iceland+Deep+Drilling+Project+core+RN-17B&rft.au=Fowler%2C+Andrew+P+G%3BZierenberg%2C+Robert+A%3BSchiffman%2C+Peter%3BMarks%2C+Naomi%3BFriethleifsson%2C+Guethmundur+Omar&rft.aulast=Fowler&rft.aufirst=Andrew+P&rft.date=2015-09-01&rft.volume=302&rft.issue=&rft.spage=47&rft.isbn=&rft.btitle=&rft.title=Journal+of+Volcanology+and+Geothermal+Research&rft.issn=03770273&rft_id=info:doi/10.1016%2Fj.jvolgeores.2015.06.009 L2 - http://www.sciencedirect.com/science/journal/03770273 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 - 82 N1 - Document feature - illus. incl. 4 tables, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-11-05 N1 - CODEN - JVGRDQ N1 - SubjectsTermNotLitGenreText - alkaline earth metals; amphibolite facies; cooling; cores; depth; electron probe data; epidote; epidote group; Europe; facies; fluid inclusions; geothermal systems; hyaloclastite; hydrothermal alteration; Iceland; Iceland Deep Drilling Project; ICP mass spectra; igneous rocks; inclusions; isotope ratios; isotopes; mass spectra; metals; metasomatism; microthermometry; orthosilicates; pyroclastics; Reykjanes geothermal system; Reykjanes Peninsula; salinity; sea water; silicates; sorosilicates; spectra; Sr-87/Sr-86; stable isotopes; strontium; temperature; volcanic rocks; water-rock interaction; Western Europe DO - http://dx.doi.org/10.1016/j.jvolgeores.2015.06.009 ER - TY - JOUR T1 - Southwest Pacific deep water carbonate chemistry linked to high southern latitude climate and atmospheric CO (sub 2) during the last glacial termination AN - 1761075295; 2016-008997 AB - A greater amount of CO (sub 2) was stored in the deep sea during glacial periods, likely via greater efficiency of the biologic pump and increased uptake by a more alkaline ocean. Reconstructing past variations in seawater carbonate ion concentration (a major component of alkalinity) enables quantification of the relative roles of different oceanic CO (sub 2) storage mechanisms and also places constraints on the timing, magnitude, and location of subsequent deep ocean ventilation. Here, we present a record of deep-water inorganic carbon chemistry since the Last Glacial Maximum (LGM; approximately 19-23 ka BP), derived from sediment core RR0503-83 raised from 1627 m in New Zealand's Bay of Plenty. The core site lies within the upper limit of southern-sourced Circumpolar Deep Water (CDW), just below the lower boundary of Antarctic Intermediate Water (AAIW). We reconstruct past changes in bottom water inorganic carbon chemistry from the trace element and stable isotopic composition of calcite shells of the epibenthic foraminifer Cibicidoides wuellerstorfi. A record of Delta CO (sub 3) (super 2-) (Delta CO (sub 3) (super 2-) =[CO (sub 3) (super 2-) ] (sub in situ) - [CO (sub 3) (super 2-) ] (sub saturation) ) derived from the foraminiferal boron to calcium ratio (B/Ca) provides evidence for greater ice-age storage of respired CO (sub 2) and reveals abrupt deglacial shifts in [CO (sub 3) (super 2-) ] (sub in situ) of up to 30 mu mol/kg (5 times larger than the difference between average LGM and Holocene values). The rapidity of these changes suggests the influence of changing water mass structure and atmospheric circulation in addition to a decrease in CO (sub 2) content of interior waters. Abstract Copyright (2015) Elsevier, B.V. JF - Quaternary Science Reviews AU - Allen, Katherine A AU - Sikes, Elisabeth L AU - Hoenisch, Baerbel AU - Elmore, Aurora C AU - Guilderson, Thomas P AU - Rosenthal, Yair AU - Anderson, Robert F Y1 - 2015/08/15/ PY - 2015 DA - 2015 Aug 15 SP - 180 EP - 191 PB - Elsevier VL - 122 SN - 0277-3791, 0277-3791 KW - sea water KW - last glacial maximum KW - oxygen KW - Southwest Pacific KW - isotopes KW - paleo-oceanography KW - Bay of Plenty KW - Holocene KW - stable isotopes KW - North Island KW - cores KW - West Pacific KW - carbon dioxide KW - upper Pleistocene KW - Foraminifera KW - Cenozoic KW - marine sediments KW - radioactive isotopes KW - dates KW - carbon KW - sediments KW - chemostratigraphy KW - absolute age KW - Invertebrata KW - trace elements KW - carbonate ion KW - Protista KW - Quaternary KW - Australasia KW - chronostratigraphy KW - isotope ratios KW - C-13/C-12 KW - South Pacific KW - O-18/O-16 KW - Pacific Ocean KW - Pleistocene KW - C-14 KW - New Zealand KW - microfossils KW - 24:Quaternary geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1761075295?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Southwest+Pacific+deep+water+carbonate+chemistry+linked+to+high+southern+latitude+climate+and+atmospheric+CO+%28sub+2%29+during+the+last+glacial+termination&rft.au=Allen%2C+Katherine+A%3BSikes%2C+Elisabeth+L%3BHoenisch%2C+Baerbel%3BElmore%2C+Aurora+C%3BGuilderson%2C+Thomas+P%3BRosenthal%2C+Yair%3BAnderson%2C+Robert+F&rft.aulast=Allen&rft.aufirst=Katherine&rft.date=2015-08-15&rft.volume=122&rft.issue=&rft.spage=180&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2Fj.quascirev.2015.05.007 L2 - http://www.sciencedirect.com/science/journal/02773791 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 - 105 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2016-01-29 N1 - SubjectsTermNotLitGenreText - absolute age; Australasia; Bay of Plenty; C-13/C-12; C-14; carbon; carbon dioxide; carbonate ion; Cenozoic; chemostratigraphy; chronostratigraphy; cores; dates; Foraminifera; Holocene; Invertebrata; isotope ratios; isotopes; last glacial maximum; marine sediments; microfossils; New Zealand; North Island; O-18/O-16; oxygen; Pacific Ocean; paleo-oceanography; Pleistocene; Protista; Quaternary; radioactive isotopes; sea water; sediments; South Pacific; Southwest Pacific; stable isotopes; trace elements; upper Pleistocene; West Pacific DO - http://dx.doi.org/10.1016/j.quascirev.2015.05.007 ER - TY - CPAPER T1 - Linking microbial growth in soil to changes in ecosystem function using heavy water stable isotope probing T2 - 100th Annual Meeting of the Ecological Society of America (ESA 2015) AN - 1731770374; 6363288 JF - 100th Annual Meeting of the Ecological Society of America (ESA 2015) AU - Blazewicz, Steve Y1 - 2015/08/09/ PY - 2015 DA - 2015 Aug 09 KW - Soil KW - Growth KW - Isotopes KW - Heavy water UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1731770374?accountid=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+microbial+growth+in+soil+to+changes+in+ecosystem+function+using+heavy+water+stable+isotope+probing&rft.au=Blazewicz%2C+Steve&rft.aulast=Blazewicz&rft.aufirst=Steve&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 - Microbial feedbacks to climate: How climate and edaphic controllers shape the rhizosphere microbiome of a wild annual grass T2 - 100th Annual Meeting of the Ecological Society of America (ESA 2015) AN - 1731767532; 6362052 JF - 100th Annual Meeting of the Ecological Society of America (ESA 2015) AU - Nuccio, Erin AU - Pett-Ridge, Jennifer AU - Brodie, Eoin AU - Firestone, Mary Y1 - 2015/08/09/ PY - 2015 DA - 2015 Aug 09 KW - Grasses KW - Rhizosphere KW - Climate KW - Feedback UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1731767532?accountid=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=Microbial+feedbacks+to+climate%3A+How+climate+and+edaphic+controllers+shape+the+rhizosphere+microbiome+of+a+wild+annual+grass&rft.au=Nuccio%2C+Erin%3BPett-Ridge%2C+Jennifer%3BBrodie%2C+Eoin%3BFirestone%2C+Mary&rft.aulast=Nuccio&rft.aufirst=Erin&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 - Experimental investigation of shear strength of sands with inherent fabric anisotropy by Tong et al, (DOI 10.1007/s11440-014-0303-6) by Gao, (DOI 10.1007/s11440-015-0383-y); discussion and reply AN - 1832624802; 755819-11 JF - Acta Geotechnica (Berlin) AU - Zhaoxia, Tong AU - Fu, Pengcheng AU - Shaopeng, Zhou AU - Dafalias, Yannis F Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 551 EP - 552 PB - Springer-Verlag, co-published with Versita, Heidelberg-Berlin VL - 10 IS - 4 SN - 1861-1125, 1861-1125 KW - soil mechanics KW - sand KW - shear strength KW - experimental studies KW - clastic sediments KW - sediments KW - fabric KW - anisotropy KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832624802?accountid=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=Acta+Geotechnica+%28Berlin%29&rft.atitle=Experimental+investigation+of+shear+strength+of+sands+with+inherent+fabric+anisotropy+by+Tong+et+al%2C+%28DOI+10.1007%2Fs11440-014-0303-6%29+by+Gao%2C+%28DOI+10.1007%2Fs11440-015-0383-y%29%3B+discussion+and+reply&rft.au=Zhaoxia%2C+Tong%3BFu%2C+Pengcheng%3BShaopeng%2C+Zhou%3BDafalias%2C+Yannis+F&rft.aulast=Zhaoxia&rft.aufirst=Tong&rft.date=2015-08-01&rft.volume=10&rft.issue=4&rft.spage=551&rft.isbn=&rft.btitle=&rft.title=Acta+Geotechnica+%28Berlin%29&rft.issn=18611125&rft_id=info:doi/10.1007%2Fs11440-015-0385-9 L2 - http://www.springerlink.com/content/1861-1133/?p 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 - 2 N1 - SuppNotes - For reference to discussion see Gao, Zhiwei, Acta Geotechnica, Vol. 10, No. 4, p. 547 - 550, 2014 or reference to original see Tong, Zhaoxia, et al, Acta Geotechnica, Vol. 9, No. 9, 2004 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - anisotropy; clastic sediments; experimental studies; fabric; sand; sediments; shear strength; soil mechanics DO - http://dx.doi.org/10.1007/s11440-015-0385-9 ER - TY - JOUR T1 - Late Holocene fire and vegetation reconstruction from the western Klamath Mountains, California, USA; a multi-disciplinary approach for examining potential human land-use impacts AN - 1832586913; 758674-12 AB - The influence of Native American land-use practices on vegetation composition and structure has long been a subject of significant debate. This is particularly true in portions of the western United States where tribal hunter-gatherers did not use agriculture to meet subsistence and other cultural needs. Climate has been viewed as the dominant determinant of vegetation structure and composition change over time, but ethnographic and anthropological evidence suggests that Native American land-use practices (particularly through the use of fire) had significant landscape effects on vegetation. However, it is difficult to distinguish climatically driven vegetation change from human-caused vegetation change using traditional paleoecological methods. To address this problem, we use a multidisciplinary methodology that incorporates paleoecology with local ethnographic and archaeological information at two lake sites in northwestern California. We show that anthropogenic impacts can be distinguished at our Fish Lake site during the cool and wet 'Little Ice Age', when we have evidence for open-forest or shade-intolerant vegetation, fostered for subsistence and cultural purposes, rather than the closed-forest or shade-tolerant vegetation expected due to the climatic shift. We also see a strong anthropogenic influence on modern vegetation at both sites following European settlement, decline in tribal use, and subsequent fire exclusion. These results demonstrate that Native American influences on vegetation structure and composition can be distinguished using methods that take into account both physical and cultural aspects of the landscape. They also begin to determine the scale at which western forests were influenced by Native American land-use practices and how modern forests of northwestern California are not solely products of climate alone. JF - The Holocene AU - Crawford, Jeffrey N AU - Mensing, Scott A AU - Lake, Frank K AU - Zimmerman, Susan R H Y1 - 2015/08/01/ PY - 2015 DA - 2015 Aug 01 SP - 1341 EP - 1357 PB - SAGE Publications, London VL - 25 IS - 8 SN - 0959-6836, 0959-6836 KW - United States KW - Lake Ogaromtoc KW - Siskiyou County California KW - isotopes KW - lead KW - vegetation KW - paleoclimatology KW - Holocene KW - cores KW - paleoecology KW - Fish Lake KW - fires KW - Cenozoic KW - California KW - radioactive isotopes KW - pollen KW - quantitative analysis KW - carbon KW - sediments KW - absolute age KW - miospores KW - climate KW - forests KW - charcoal KW - Quaternary KW - assemblages KW - human activity KW - paleoenvironment KW - metals KW - palynomorphs KW - lacustrine environment KW - Klamath Mountains KW - C-14 KW - upper Holocene KW - microfossils KW - Pb-210 KW - lake sediments KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832586913?accountid=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=The+Holocene&rft.atitle=Late+Holocene+fire+and+vegetation+reconstruction+from+the+western+Klamath+Mountains%2C+California%2C+USA%3B+a+multi-disciplinary+approach+for+examining+potential+human+land-use+impacts&rft.au=Crawford%2C+Jeffrey+N%3BMensing%2C+Scott+A%3BLake%2C+Frank+K%3BZimmerman%2C+Susan+R+H&rft.aulast=Crawford&rft.aufirst=Jeffrey&rft.date=2015-08-01&rft.volume=25&rft.issue=8&rft.spage=1341&rft.isbn=&rft.btitle=&rft.title=The+Holocene&rft.issn=09596836&rft_id=info:doi/10.1177%2F0959683615584205 L2 - http://hol.sagepub.com/ 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 - 102 N1 - Document feature - illus. incl. 3 tables, sketch map N1 - SuppNotes - NSF grants BCS-0926732 and and BCS-0964261 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - absolute age; assemblages; C-14; California; carbon; Cenozoic; charcoal; climate; cores; fires; Fish Lake; forests; Holocene; human activity; isotopes; Klamath Mountains; lacustrine environment; Lake Ogaromtoc; lake sediments; lead; metals; microfossils; miospores; paleoclimatology; paleoecology; paleoenvironment; palynomorphs; Pb-210; pollen; quantitative analysis; Quaternary; radioactive isotopes; sediments; Siskiyou County California; United States; upper Holocene; vegetation DO - http://dx.doi.org/10.1177/0959683615584205 ER - TY - JOUR T1 - Late glacial and Holocene glacier fluctuations at Nevado Huaguruncho in the Eastern Cordillera of the Peruvian Andes AN - 1707523224; 2015-082201 AB - Discerning the timing and pattern of late Quaternary glacier variability in the tropical Andes is important for our understanding of global climate change. Terrestrial cosmogenic nuclide (TCN) ages (48) on moraines and radiocarbon-dated clastic sediment records from a moraine-dammed lake at Nevado Huaguruncho, Peru, document the waxing and waning of alpine glaciers in the Eastern Cordillera during the past approximately 15 k.y. The integrated moraine and lake records indicate that ice advanced at 14.1 + or - 0.4 ka, during the first half of the Antarctic Cold Reversal, and began retreating by 13.7 + or - 0.4 ka. Ice retreated and paraglacial sedimentation declined until ca. 12 ka, when proxy indicators of glacigenic sediment increased sharply, heralding an ice advance that culminated in multiple moraine positions from 11.6 + or - 0.2 ka to 10.3 + or - 0.2 ka. Proxy indicators of glacigenic sediment input suggest oscillating ice extents from ca. 10 to 4 ka, and somewhat more extensive ice cover from 4 to 2 ka, followed by ice retreat. The lack of TCN ages from these intervals suggests that glaciers were less extensive than during the late Holocene. A final Holocene advance occurred during the Little Ice Age (LIA, ca. 0.4 to 0.2 ka) under colder and wetter conditions as documented in regional proxy archives. The pattern of glacier variability at Huaguruncho during the Late Glacial and Holocene is similar to the pattern of tropical Atlantic sea-surface temperatures, and provides evidence that prior to the LIA, ice extent in the eastern tropical Andes was decoupled from temperatures in the high-latitude North Atlantic. JF - Geology (Boulder) AU - Stansell, Nathan D AU - Rodbell, Donald T AU - Licciardi, Joseph M AU - Sedlak, Christopher M AU - Schweinsberg, Avriel D AU - Huss, Elizabeth G AU - Delgado, Grace M AU - Zimmerman, Susan H AU - Finkel, Robert C Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 747 EP - 750 PB - Geological Society of America (GSA), Boulder, CO VL - 43 IS - 8 SN - 0091-7613, 0091-7613 KW - lithostratigraphy KW - glaciation KW - isotopes KW - lead KW - paleoclimatology KW - Holocene KW - exposure age KW - cores KW - climate change KW - upper Pleistocene KW - Cenozoic KW - radioactive isotopes KW - Lake Yanacocha KW - dates KW - carbon KW - sediments KW - moraines KW - absolute age KW - Andes KW - Eastern Cordillera KW - Quaternary KW - chronostratigraphy KW - glaciers KW - South America KW - metals KW - lacustrine environment KW - Pleistocene KW - Northern Andes KW - Nevado Huaguruncho KW - C-14 KW - Pb-210 KW - lake sediments KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707523224?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geology+%28Boulder%29&rft.atitle=Late+glacial+and+Holocene+glacier+fluctuations+at+Nevado+Huaguruncho+in+the+Eastern+Cordillera+of+the+Peruvian+Andes&rft.au=Stansell%2C+Nathan+D%3BRodbell%2C+Donald+T%3BLicciardi%2C+Joseph+M%3BSedlak%2C+Christopher+M%3BSchweinsberg%2C+Avriel+D%3BHuss%2C+Elizabeth+G%3BDelgado%2C+Grace+M%3BZimmerman%2C+Susan+H%3BFinkel%2C+Robert+C&rft.aulast=Stansell&rft.aufirst=Nathan&rft.date=2015-08-01&rft.volume=43&rft.issue=8&rft.spage=747&rft.isbn=&rft.btitle=&rft.title=Geology+%28Boulder%29&rft.issn=00917613&rft_id=info:doi/10.1130%2FG36735.1 L2 - http://geology.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 - 14 N1 - PubXState - CO N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2015-08-27 N1 - CODEN - GLGYBA N1 - SubjectsTermNotLitGenreText - absolute age; Andes; C-14; carbon; Cenozoic; chronostratigraphy; climate change; cores; dates; Eastern Cordillera; exposure age; glaciation; glaciers; Holocene; isotopes; lacustrine environment; lake sediments; Lake Yanacocha; lead; lithostratigraphy; metals; moraines; Nevado Huaguruncho; Northern Andes; paleoclimatology; Pb-210; Pleistocene; Quaternary; radioactive isotopes; sediments; South America; upper Pleistocene DO - http://dx.doi.org/10.1130/G36735.1 ER - TY - JOUR T1 - Engineered Nanostructures of Haptens Lead to Unexpected Formation of Membrane Nanotubes Connecting Rat Basophilic Leukemia Cells. AN - 1700102803; 26057701 AB - A recent finding reports that co-stimulation of the high-affinity immunoglobulin E (IgE) receptor (FcεRI) and the chemokine receptor 1 (CCR1) triggered formation of membrane nanotubes among bone-marrow-derived mast cells. The co-stimulation was attained using corresponding ligands: IgE binding antigen and macrophage inflammatory protein 1α (MIP1 α), respectively. However, this approach failed to trigger formation of nanotubes among rat basophilic leukemia (RBL) cells due to the lack of CCR1 on the cell surface (Int. Immunol. 2010, 22 (2), 113-128). RBL cells are frequently used as a model for mast cells and are best known for antibody-mediated activation via FcεRI. This work reports the successful formation of membrane nanotubes among RBLs using only one stimulus, a hapten of 2,4-dinitrophenyl (DNP) molecules, which are presented as nanostructures with our designed spatial arrangements. This observation underlines the significance of the local presentation of ligands in the context of impacting the cellular signaling cascades. In the case of RBL, certain DNP nanostructures suppress antigen-induced degranulation and facilitate the rearrangement of the cytoskeleton to form nanotubes. These results demonstrate an important scientific concept; engineered nanostructures enable cellular signaling cascades, where current technologies encounter great difficulties. More importantly, nanotechnology offers a new platform to selectively activate and/or inhibit desired cellular signaling cascades. JF - ACS nano AU - Li, Jie-Ren AU - Ross, Shailise S AU - Liu, Yang AU - Liu, Ying X AU - Wang, Kang-Hsin AU - Chen, Huan-Yuan AU - Liu, Fu-Tong AU - Laurence, Ted A AU - Liu, Gang-Yu AD - †Department of Chemistry, University of California, Davis, California 95616, United States. ; ‡Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, California 95817, United States. ; ∥Lawrence Livermore National Laboratory, Livermore, California 94550, United States. Y1 - 2015/07/28/ PY - 2015 DA - 2015 Jul 28 SP - 6738 EP - 6746 VL - 9 IS - 7 KW - Haptens KW - 0 KW - Index Medicus KW - scanning electron microscopy (SEM) KW - atomic force microscopy (AFM) KW - particle lithography KW - membrane nanotubes KW - rat basophilic leukemia (RBL) cells KW - haptens KW - mast cells KW - Rats KW - Animals KW - Cell Line, Tumor KW - Cell Membrane Structures -- drug effects KW - Nanostructures -- chemistry KW - Haptens -- chemistry KW - Basophils -- ultrastructure KW - Cell Membrane Structures -- ultrastructure KW - Haptens -- pharmacology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700102803?accountid=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=Engineered+Nanostructures+of+Haptens+Lead+to+Unexpected+Formation+of+Membrane+Nanotubes+Connecting+Rat+Basophilic+Leukemia+Cells.&rft.au=Li%2C+Jie-Ren%3BRoss%2C+Shailise+S%3BLiu%2C+Yang%3BLiu%2C+Ying+X%3BWang%2C+Kang-Hsin%3BChen%2C+Huan-Yuan%3BLiu%2C+Fu-Tong%3BLaurence%2C+Ted+A%3BLiu%2C+Gang-Yu&rft.aulast=Li&rft.aufirst=Jie-Ren&rft.date=2015-07-28&rft.volume=9&rft.issue=7&rft.spage=6738&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Facsnano.5b02270 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-06-26 N1 - Date created - 2015-07-28 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Inorg Chem. 2008 Apr 21;47(8):3284-91 [18345627] Allergy. 2015 Feb;70(2):131-40 [25250718] Annu Rev Biophys. 2008;37:265-88 [18573082] Nano Lett. 2008 Jul;8(7):1916-22 [18563943] Nano Lett. 2008 Aug;8(8):2503-9 [18642963] Trends Cell Biol. 2008 Sep;18(9):414-20 [18703335] Adv Immunol. 2008;98:85-120 [18772004] Proc Natl Acad Sci U S A. 2008 Nov 11;105(45):17238-44 [19004813] Nat Cell Biol. 2009 Mar;11(3):328-36 [19198598] Immunol Rev. 2009 Mar;228(1):149-69 [19290926] Annu Rev Phys Chem. 2009;60:449-68 [18999989] FEBS Lett. 2009 Jun 5;583(11):1792-9 [19289124] Nano Lett. 2009 Jul;9(7):2614-8 [19583282] Nat Cell Biol. 2009 Dec;11(12):1427-32 [19935652] Int Immunol. 2010 Feb;22(2):113-28 [20173038] ACS Nano. 2010 Jun 22;4(6):3015-22 [20524630] FEBS Lett. 2010 Dec 15;584(24):4933-40 [20696166] Cell Death Differ. 2011 Apr;18(4):732-42 [21113142] ACS Nano. 2011 Mar 22;5(3):1685-92 [21322534] ACS Nano. 2011 Nov 22;5(11):8672-83 [21999491] ACS Nano. 2012 Oct 23;6(10):9141-9 [22973942] ACS Nano. 2012 Nov 27;6(11):10033-41 [23102457] Cell Death Dis. 2013;4:e726 [23868059] Langmuir. 2014 May 6;30(17):4997-5004 [24716859] PLoS One. 2014;9(6):e99196 [24945745] J Histochem Cytochem. 2014 Oct;62(10):698-738 [25062998] Mol Immunol. 2015 Jan;63(1):69-73 [24656327] Mol Immunol. 2015 Jan;63(1):94-103 [24671125] Exp Dermatol. 2001 Feb;10(1):1-10 [11168574] Allergy Asthma Proc. 2001 May-Jun;22(3):115-9 [11424870] Clin Rev Allergy Immunol. 2002 Apr;22(2):119-48 [11975419] Mol Immunol. 2002 Sep;38(16-18):1259-68 [12217393] J Electron Microsc (Tokyo). 2003;52(4):429-33 [14599106] Science. 2004 Feb 13;303(5660):1007-10 [14963329] J Exp Med. 2004 Jun 7;199(11):1491-502 [15173205] J Immunol. 2004 Jul 1;173(1):100-12 [15210764] J Immunol. 2004 Aug 1;173(3):1511-3 [15265877] J Immunol. 1980 Jun;124(6):2728-37 [7373045] J Cell Biol. 1985 Dec;101(6):2145-55 [2933414] Cell Immunol. 1994 Jun;156(1):1-12 [8200029] J Appl Bacteriol. 1996 Feb;80(2):225-32 [8642017] J Microsc. 1997 Apr;186(Pt 1):84-7 [9159923] Physiol Rev. 1997 Oct;77(4):1033-79 [9354811] Mol Immunol. 2015 Jan;63(1):55-60 [24768320] Proc Natl Acad Sci U S A. 1998 Sep 15;95(19):11330-5 [9736736] Langmuir. 2005 Apr 26;21(9):4117-22 [15835982] Circ Res. 2005 May 27;96(10):1039-41 [15879310] Immunity. 2005 Sep;23(3):309-18 [16169503] J Immunol. 2005 Nov 15;175(10):6885-92 [16272347] Nat Rev Cancer. 2005 Nov;5(11):899-904 [16327766] J Mol Cell Cardiol. 2006 Jan;40(1):1-8 [16321397] Nat Rev Immunol. 2006 Mar;6(3):218-30 [16470226] J Allergy Clin Immunol. 2006 Jun;117(6):1214-25; quiz 1226 [16750977] J Immunol. 2006 Dec 15;177(12):8476-83 [17142745] FEBS Lett. 2007 May 22;581(11):2194-201 [17433307] Immunol Rev. 2007 Jun;217:269-79 [17498065] J Immunol. 2007 Jul 1;179(1):95-102 [17579026] PLoS One. 2007;2(11):e1204 [18030338] Nat Cell Biol. 2008 Feb;10(2):211-9 [18193035] Nat Med. 2008 May;14(5):489-90 [18463655] Nat Rev Mol Cell Biol. 2008 Jun;9(6):431-6 [18431401] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsnano.5b02270 ER - TY - JOUR T1 - Buoyancy instability of homologous implosions AN - 1701482878; PQ0001708026 AB - I consider the hydrodynamic stability of imploding ideal gases as an idealized model for inertial confinement fusion capsules, sonoluminescent bubbles and the gravitational collapse of astrophysical gases. For oblate modes (short-wavelength incompressive modes elongated in the direction of the mean flow), a second-order ordinary differential equation is derived that can be used to assess the stability of any time-dependent flow with planar, cylindrical or spherical symmetry. Upon further restricting the analysis to homologous flows, it is shown that a monatomic gas is governed by the Schwarzschild criterion for buoyant stability. Under buoyantly unstable conditions, both entropy and vorticity fluctuations experience power-law growth in time, with a growth rate that depends upon mean flow gradients and, in the absence of dissipative effects, is independent of mode number. If the flow accelerates throughout the implosion, oblate modes amplify by a factor , where is the convergence ratio of the implosion, is the initial buoyancy frequency and is the implosion time scale. If, instead, the implosion consists of a coasting phase followed by stagnation, oblate modes amplify by a factor , where is the buoyancy frequency at stagnation and is the stagnation time scale. Even under stable conditions, vorticity fluctuations grow due to the conservation of angular momentum as the gas is compressed. For non-monatomic gases, this additional growth due to compression results in weak oscillatory growth under conditions that would otherwise be buoyantly stable; this over-stability is consistent with the conservation of wave action in the fluid frame. The above analytical results are verified by evolving the complete set of linear equations as an initial value problem, and it is demonstrated that oblate modes are the fastest-growing modes and that high mode numbers are required to reach this limit (Legendre mode for spherical flows). Finally, comparisons are made with a Lagrangian hydrodynamics code, and it is found that a numerical resolution of zones per wavelength is required to capture these solutions accurately. This translates to an angular resolution of , or to resolve the fastest-growing modes. JF - Journal of Fluid Mechanics AU - Johnson, B M AD - Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, johnson359@llnl.gov Y1 - 2015/07/10/ PY - 2015 DA - 2015 Jul 10 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 774 SN - 0022-1120, 0022-1120 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Growth rate KW - Hydrodynamics KW - Collapse KW - Brunt-vaisala frequency KW - Ocean circulation KW - Growth Rates KW - Lagrangian current measurement KW - Differential Equations KW - Implosions KW - Wavelengths KW - Differential equations KW - Boundary value problems KW - Conservation KW - Fluctuations KW - Entropy KW - Buoyancy KW - SW 0810:General KW - Q2 09183:Physics and chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701482878?accountid=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+Fluid+Mechanics&rft.atitle=Buoyancy+instability+of+homologous+implosions&rft.au=Johnson%2C+B+M&rft.aulast=Johnson&rft.aufirst=B&rft.date=2015-07-10&rft.volume=774&rft.issue=&rft.spage=056319%3B+056318%3B+042707%3B+072701%3B+112702%3B+075004%3B+053106&rft.isbn=&rft.btitle=&rft.title=Journal+of+Fluid+Mechanics&rft.issn=00221120&rft_id=info:doi/10.1017%2Fjfm.2015.309 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Number of references - 27 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Growth rate; Boundary value problems; Ocean circulation; Brunt-vaisala frequency; Lagrangian current measurement; Implosions; Entropy; Differential equations; Buoyancy; Hydrodynamics; Collapse; Conservation; Growth Rates; Differential Equations; Fluctuations; Wavelengths DO - http://dx.doi.org/10.1017/jfm.2015.309 ER - TY - JOUR T1 - Electrical properties of methane hydrate + sediment mixtures AN - 1773797119; 2016-024686 AB - Knowledge of the electrical properties of multicomponent systems with gas hydrate, sediments, and pore water is needed to help relate electromagnetic (EM) measurements to specific gas hydrate concentration and distribution patterns in nature. Toward this goal, we built a pressure cell capable of measuring in situ electrical properties of multicomponent systems such that the effects of individual components and mixing relations can be assessed. We first established the temperature-dependent electrical conductivity (sigma ) of pure, single-phase methane hydrate to be nearly equal 5 orders of magnitude lower than seawater, a substantial contrast that can help differentiate hydrate deposits from significantly more conductive water-saturated sediments in EM field surveys. Here we report sigma measurements of two-component systems in which methane hydrate is mixed with variable amounts of quartz sand or glass beads. Sand by itself has low sigma but is found to increase the overall sigma of mixtures with well-connected methane hydrate. Alternatively, the overall sigma decreases when sand concentrations are high enough to cause gas hydrate to be poorly connected, indicating that hydrate grains provide the primary conduction path. Our measurements suggest that impurities from sand induce chemical interactions and/or doping effects that result in higher electrical conductivity with lower temperature dependence. These results can be used in the modeling of massive or two-phase gas-hydrate-bearing systems devoid of conductive pore water. Further experiments that include a free water phase are the necessary next steps toward developing complex models relevant to most natural systems. Abstract Copyright (2015), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Du Frane, Wyatt L AU - Stern, Laura A AU - Constable, Steven AU - Weitemeyer, Karen A AU - Smith, Megan M AU - Roberts, Jeffery J Y1 - 2015/07// PY - 2015 DA - July 2015 SP - 4773 EP - 4783 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 7 SN - 2169-9313, 2169-9313 KW - electrical properties KW - sea water KW - methane KW - gas hydrates KW - geophysical methods KW - aliphatic hydrocarbons KW - alkanes KW - organic compounds KW - marine sediments KW - sediments KW - hydrocarbons KW - electromagnetic methods KW - chemical composition KW - pore water KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773797119?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Electrical+properties+of+methane+hydrate+%2B+sediment+mixtures&rft.au=Du+Frane%2C+Wyatt+L%3BStern%2C+Laura+A%3BConstable%2C+Steven%3BWeitemeyer%2C+Karen+A%3BSmith%2C+Megan+M%3BRoberts%2C+Jeffery+J&rft.aulast=Du+Frane&rft.aufirst=Wyatt&rft.date=2015-07-01&rft.volume=120&rft.issue=7&rft.spage=4773&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2015JB011940 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 - 2016-03-17 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; chemical composition; electrical properties; electromagnetic methods; gas hydrates; geophysical methods; hydrocarbons; marine sediments; methane; organic compounds; pore water; sea water; sediments DO - http://dx.doi.org/10.1002/2015JB011940 ER - TY - JOUR T1 - Measuring turbine inflow with vertically-profiling lidar in complex terrain AN - 1770273348; PQ0002258858 AB - Two Laser and Detection Ranging (lidar) units were deployed in the Altamont Pass region of California to study complex flow dynamics at a moderately complex terrain wind farm. The lidars provided wind measurements at the base and along the slope of a 140m tall ridge and captured air flow as it moved up and along the ridge towards an unwaked turbine under varying stability conditions. Elevation enhanced wind speed during well-mixed or near-neutral conditions at the top of the ridge; however, the hill "speed-up" was smaller than expected during stable conditions. At these times the upwind terrain played a significant role in local flow variability as did terrain features within the wind farm. The observations were next analyzed to assess the ability of using vertically-profiling lidar in complex terrain to measure free-stream inflow for evaluating power generation response. Better agreement between the lidar wind speed and expected power was found once the lidar measurements had been adjusted for stability-dependent hill speed-up effects. This suggests that vertically-profiling lidar can be used in complex terrain to measure inflow if the terrain-induced flow features are also considered. JF - Journal of Wind Engineering and Industrial Aerodynamics AU - Wharton, S AU - Newman, J F AU - Qualley, G AU - Miller, W O AD - Atmospheric, Earth and Energy Division, Lawrence Livermore National Laboratory, 7000 East Avenue, L-103, Livermore, CA 94550, USA Y1 - 2015/07// PY - 2015 DA - July 2015 SP - 217 EP - 231 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 142 SN - 0167-6105, 0167-6105 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Complex terrain KW - Altamont Pass KW - Wind resource KW - Wind power KW - Lidar KW - Hill "speed-up" KW - Inflow KW - Wind shear KW - Wind speed KW - Turbines KW - Slopes KW - Terrain KW - Ridges UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770273348?accountid=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+Wind+Engineering+and+Industrial+Aerodynamics&rft.atitle=Measuring+turbine+inflow+with+vertically-profiling+lidar+in+complex+terrain&rft.au=Wharton%2C+S%3BNewman%2C+J+F%3BQualley%2C+G%3BMiller%2C+W+O&rft.aulast=Wharton&rft.aufirst=S&rft.date=2015-07-01&rft.volume=142&rft.issue=&rft.spage=217&rft.isbn=&rft.btitle=&rft.title=Journal+of+Wind+Engineering+and+Industrial+Aerodynamics&rft.issn=01676105&rft_id=info:doi/10.1016%2Fj.jweia.2015.03.023 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-03-04 DO - http://dx.doi.org/10.1016/j.jweia.2015.03.023 ER - TY - JOUR T1 - ELECTROCHEMISTRY. High-performance transition metal-doped Pt₃Ni octahedra for oxygen reduction reaction. AN - 1687999899; 26068847 AB - Bimetallic platinum-nickel (Pt-Ni) nanostructures represent an emerging class of electrocatalysts for oxygen reduction reaction (ORR) in fuel cells, but practical applications have been limited by catalytic activity and durability. We surface-doped Pt3Ni octahedra supported on carbon with transition metals, termed M-Pt3Ni/C, where M is vanadium, chromium, manganese, iron, cobalt, molybdenum (Mo), tungsten, or rhenium. The Mo-Pt3Ni/C showed the best ORR performance, with a specific activity of 10.3 mA/cm(2) and mass activity of 6.98 A/mg(Pt), which are 81- and 73-fold enhancements compared with the commercial Pt/C catalyst (0.127 mA/cm(2) and 0.096 A/mg(Pt)). Theoretical calculations suggest that Mo prefers subsurface positions near the particle edges in vacuum and surface vertex/edge sites in oxidizing conditions, where it enhances both the performance and the stability of the Pt3Ni catalyst. JF - Science (New York, N.Y.) AU - Huang, Xiaoqing AU - Zhao, Zipeng AU - Cao, Liang AU - Chen, Yu AU - Zhu, Enbo AU - Lin, Zhaoyang AU - Li, Mufan AU - Yan, Aiming AU - Zettl, Alex AU - Wang, Y Morris AU - Duan, Xiangfeng AU - Mueller, Tim AU - Huang, Yu AD - Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA. ; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA. ; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA. ; Department of Physics and Center of Integrated Nanomechanical Systems, University of California, Berkeley, CA 94720, USA. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Kavli Energy NanoSciences Institute at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. ; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory (LLNL), Livermore, CA 94550, USA. ; California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA. Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA. ; Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA. tmueller@jhu.edu yhuang@seas.ucla.edu. ; Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA. tmueller@jhu.edu yhuang@seas.ucla.edu. Y1 - 2015/06/12/ PY - 2015 DA - 2015 Jun 12 SP - 1230 EP - 1234 VL - 348 IS - 6240 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1687999899?accountid=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=ELECTROCHEMISTRY.+High-performance+transition+metal-doped+Pt%E2%82%83Ni+octahedra+for+oxygen+reduction+reaction.&rft.au=Huang%2C+Xiaoqing%3BZhao%2C+Zipeng%3BCao%2C+Liang%3BChen%2C+Yu%3BZhu%2C+Enbo%3BLin%2C+Zhaoyang%3BLi%2C+Mufan%3BYan%2C+Aiming%3BZettl%2C+Alex%3BWang%2C+Y+Morris%3BDuan%2C+Xiangfeng%3BMueller%2C+Tim%3BHuang%2C+Yu&rft.aulast=Huang&rft.aufirst=Xiaoqing&rft.date=2015-06-12&rft.volume=348&rft.issue=6240&rft.spage=1230&rft.isbn=&rft.btitle=&rft.title=Science+%28New+York%2C+N.Y.%29&rft.issn=1095-9203&rft_id=info:doi/10.1126%2Fscience.aaa8765 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-07-07 N1 - Date created - 2015-06-13 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1126/science.aaa8765 ER - TY - JOUR T1 - Koppen bioclimatic evaluation of CMIP historical climate simulations AN - 1776655725; PQ0002757387 AB - Koppen bioclimatic classification relates generic vegetation types to characteristics of the interactive annual-cycles of continental temperature (T) and precipitation (P). In addition to predicting possible bioclimatic consequences of past or prospective climate change, a Koppen scheme can be used to pinpoint biases in model simulations of historical T and P. In this study a Koppen evaluation of Coupled Model Intercomparison Project (CMIP) simulations of historical climate is conducted for the period 1980-1999. Evaluation of an example CMIP5 model illustrates how errors in simulating Koppen vegetation types (relative to those derived from observational reference data) can be deconstructed and related to model-specific temperature and precipitation biases. Measures of CMIP model skill in simulating the reference Koppen vegetation types are also developed, allowing the bioclimatic performance of a CMIP5 simulation of T and P to be compared quantitatively with its CMIP3 antecedent. Although certain bioclimatic discrepancies persist across model generations, the CMIP5 models collectively display an improved rendering of historical T and P relative to their CMIP3 counterparts. In addition, the Koppen-based performance metrics are found to be quite insensitive to alternative choices of observational reference data or to differences in model horizontal resolution. JF - Environmental Research Letters AU - Phillips, Thomas J AU - Bonfils, Celine J W AD - Program for Climate Model Diagnosis and Intercomparison (PCMDI) Lawrence Livermore National Laboratory, Mailcode L-103 7000 East Avenue, Livermore, CA 94550, USA, phillips14@llnl.gov Y1 - 2015/06// PY - 2015 DA - June 2015 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 10 IS - 6 SN - 1748-9326, 1748-9326 KW - Meteorological & Geoastrophysical Abstracts; Sustainability Science Abstracts; Environment Abstracts KW - Historical account KW - Climate models KW - Rainfall KW - Climate KW - Climate change KW - Temperature KW - Simulation KW - Vegetation KW - Environmental research KW - Precipitation KW - Climate and vegetation KW - Classification KW - Numerical simulations 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/1776655725?accountid=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=Environmental+Research+Letters&rft.atitle=Koppen+bioclimatic+evaluation+of+CMIP+historical+climate+simulations&rft.au=Phillips%2C+Thomas+J%3BBonfils%2C+Celine+J+W&rft.aulast=Phillips&rft.aufirst=Thomas&rft.date=2015-06-01&rft.volume=10&rft.issue=6&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=17489326&rft_id=info:doi/10.1088%2F1748-9326%2F10%2F6%2F064005 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Climate and vegetation; Climate models; Numerical simulations; Climate change; Environmental research; Precipitation; Historical account; Classification; Rainfall; Climate; Temperature; Vegetation; Simulation DO - http://dx.doi.org/10.1088/1748-9326/10/6/064005 ER - TY - JOUR T1 - Mineral protection of soil carbon counteracted by root exudates AN - 1773837494; PQ0002696592 AB - Multiple lines of existing evidence suggest that climate change enhances root exudation of organic compounds into soils. Recent experimental studies show that increased exudate inputs may cause a net loss of soil carbon. This stimulation of microbial carbon mineralization ('priming') is commonly rationalized by the assumption that exudates provide a readily bioavailable supply of energy for the decomposition of native soil carbon (co-metabolism). Here we show that an alternate mechanism can cause carbon loss of equal or greater magnitude. We find that a common root exudate, oxalic acid, promotes carbon loss by liberating organic compounds from protective associations with minerals. By enhancing microbial access to previously mineral-protected compounds, this indirect mechanism accelerated carbon loss more than simply increasing the supply of energetically more favourable substrates. Our results provide insights into the coupled biotic-abiotic mechanisms underlying the 'priming' phenomenon and challenge the assumption that mineral-associated carbon is protected from microbial cycling over millennial timescales. JF - Nature Climate Change AU - Keiluweit, Marco AU - Bougoure, Jeremy J AU - Nico, Peter S AU - Pett-Ridge, Jennifer AU - Weber, Peter K AU - Kleber, Markus AD - 1] Department of Crop and Soil Science, Oregon State University, ALS Building 3017, Corvallis, Oregon 97331, USA [2] Chemical Sciences Division, Lawrence Livermore National Laboratory, 7000 East avenue, L-231, Livermore, California 94550, USA Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 588 EP - 595 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 5 IS - 6 SN - 1758-678X, 1758-678X KW - Environment Abstracts; Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts KW - Soil KW - Bioavailability KW - Energy KW - Climate change KW - Organic compounds KW - Mineralization KW - Minerals KW - Decomposition KW - Oxalic acid KW - Organic compounds in soil KW - ENA 11:Non-Renewable Resources KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773837494?accountid=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=Mineral+protection+of+soil+carbon+counteracted+by+root+exudates&rft.au=Keiluweit%2C+Marco%3BBougoure%2C+Jeremy+J%3BNico%2C+Peter+S%3BPett-Ridge%2C+Jennifer%3BWeber%2C+Peter+K%3BKleber%2C+Markus&rft.aulast=Keiluweit&rft.aufirst=Marco&rft.date=2015-06-01&rft.volume=5&rft.issue=6&rft.spage=588&rft.isbn=&rft.btitle=&rft.title=Nature+Climate+Change&rft.issn=1758678X&rft_id=info:doi/10.1038%2Fnclimate2580 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Climate change; Organic compounds in soil; Soil; Bioavailability; Energy; Organic compounds; Mineralization; Decomposition; Minerals; Oxalic acid DO - http://dx.doi.org/10.1038/nclimate2580 ER - TY - JOUR T1 - Improved regional and teleseismic P-wave travel-time prediction and event location using a global 3D velocity model AN - 1707522522; 2015-081932 AB - A global validation dataset of 116 seismic events and 20,977 associated Pn and P arrivals is used to assess travel-time prediction and event location accuracy for the global-scale, 3D, P-wave velocity model called LLNL-G3Dv3 (Simmons et al., 2012). Strong regional trends that are observed for ak135 travel-time residuals are largely removed when LLNL-G3Dv3 is used for prediction. The 25th-75th quantile spread of travel-time residuals is reduced by 30%-40% at teleseismic distances, and the spread is reduced by approximately 60% at regional distances (<16 degrees ). Epicenter error decreases when more data are used to constrain event locations until more than approximately 40 arrivals times are used. At which point, epicenter error reduction tends to plateau. Median epicenter errors for the ak135 and LLNL-G3Dv3 models plateau at approximately 8.0 and approximately 5.5 km, respectively, for teleseismic P datasets. Median epicenter errors for the ak135 and LLNL-G3Dv3 models plateau at approximately 12.0 and approximately 4.0 km, respectively, for regional Pn datasets. We demonstrate that spatially correlated travel-time residual errors for the ak135 model lead to increasing epicenter error when approximately 40 to approximately 100 Pn arrivals are used to constrain the location. The effect of correlated error is mitigated by LLNL-G3Dv3, for which epicenter error steadily decreases to approximately 4 km when 100 Pn arrivals are used. The median area of 0.95 epicenter probability bounds for ak135 and LLNL-G3Dv3 are 1811 and 758 km (super 2) , respectively. The ak135 ellipses are inflated to achieve the desired rate of true events occurring inside the probability region, whereas LLNL-G3Dv3 error ellipses based on empirical residual distributions cover the true location at the expected rate because location bias is minimal. JF - Bulletin of the Seismological Society of America AU - Myers, Stephen C AU - Simmons, Nathan A AU - Johannesson, Gardar AU - Matzel, Eric Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 1642 EP - 1660 PB - Seismological Society of America, Berkeley, CA VL - 105 IS - 3 SN - 0037-1106, 0037-1106 KW - tomography KW - P-waves KW - body waves KW - numerical models KW - three-dimensional models KW - global KW - statistical analysis KW - prediction KW - elastic waves KW - teleseismic signals KW - models KW - errors KW - seismicity KW - traveltime KW - ray tracing KW - propagation KW - probability KW - focus KW - epicenters KW - seismic waves KW - seismic networks KW - earthquakes KW - accuracy KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707522522?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Improved+regional+and+teleseismic+P-wave+travel-time+prediction+and+event+location+using+a+global+3D+velocity+model&rft.au=Myers%2C+Stephen+C%3BSimmons%2C+Nathan+A%3BJohannesson%2C+Gardar%3BMatzel%2C+Eric&rft.aulast=Myers&rft.aufirst=Stephen&rft.date=2015-06-01&rft.volume=105&rft.issue=3&rft.spage=1642&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120140272 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 - 54 N1 - PubXState - CA N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-08-27 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - accuracy; body waves; earthquakes; elastic waves; epicenters; errors; focus; global; models; numerical models; P-waves; prediction; probability; propagation; ray tracing; seismic networks; seismic waves; seismicity; statistical analysis; teleseismic signals; three-dimensional models; tomography; traveltime DO - http://dx.doi.org/10.1785/0120140272 ER - TY - JOUR T1 - External Influences on Modeled and Observed Cloud Trends AN - 1701477916; PQ0001687606 AB - Understanding the cloud response to external forcing is a major challenge for climate science. This crucial goal is complicated by intermodel differences in simulating present and future cloud cover and by observational uncertainty. This is the first formal detection and attribution study of cloud changes over the satellite era. Presented herein are CMIP5 model-derived fingerprints of externally forced changes to three cloud properties: the latitudes at which the zonally averaged total cloud fraction (CLT) is maximized or minimized, the zonal average CLT at these latitudes, and the height of high clouds at these latitudes. By considering simultaneous changes in all three properties, the authors define a coherent multivariate fingerprint of cloud response to external forcing and use models from phase 5 of CMIP (CMIP5) to calculate the average time to detect these changes. It is found that given perfect satellite cloud observations beginning in 1983, the models indicate that a detectable multivariate signal should have already emerged. A search is then made for signals of external forcing in two observational datasets: ISCCP and PATMOS-x. The datasets are both found to show a poleward migration of the zonal CLT pattern that is incompatible with forced CMIP5 models. Nevertheless, a detectable multivariate signal is predicted by models over the PATMOS-x time period and is indeed present in the dataset. Despite persistent observational uncertainties, these results present a strong case for continued efforts to improve these existing satellite observations, in addition to planning for new missions. JF - Journal of Climate AU - Marvel, Kate AU - Zelinka, Mark AU - Klein, Stephen A AU - Bonfils, Celine AU - Caldwell, Peter AU - Doutriaux, Charles AU - Santer, Benjamin D AU - Taylor, Karl E AD - Lawrence Livermore National Laboratory, Livermore, California, and NASA Goddard Institute for Space Studies, and Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 4820 EP - 4840 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 28 IS - 12 SN - 0894-8755, 0894-8755 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - Clouds KW - Radiative forcing KW - Pattern detection KW - Climate models KW - Satellite cloud observations KW - Climates KW - Cloud Cover KW - Cloud cover KW - Migration KW - High level clouds KW - Model Studies KW - Satellite data KW - Planning KW - Atmospheric forcing KW - Cloud properties KW - Q2 09393:Remote geosensing KW - SW 0810:General KW - M2 551.58:Climatology (551.58) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701477916?accountid=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+Climate&rft.atitle=External+Influences+on+Modeled+and+Observed+Cloud+Trends&rft.au=Marvel%2C+Kate%3BZelinka%2C+Mark%3BKlein%2C+Stephen+A%3BBonfils%2C+Celine%3BCaldwell%2C+Peter%3BDoutriaux%2C+Charles%3BSanter%2C+Benjamin+D%3BTaylor%2C+Karl+E&rft.aulast=Marvel&rft.aufirst=Kate&rft.date=2015-06-01&rft.volume=28&rft.issue=12&rft.spage=4820&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-14-00734.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Number of references - 66 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Atmospheric forcing; Cloud cover; Clouds; Satellite data; Climate models; Satellite cloud observations; Cloud properties; High level clouds; Planning; Climates; Cloud Cover; Migration; Model Studies DO - http://dx.doi.org/10.1175/JCLI-D-14-00734.1 ER - TY - JOUR T1 - Determining the source characteristics of explosions near the Earth's surface AN - 1793205110; 2016-048524 AB - We present a method to determine source characteristics of explosions near the Earth's surface. The technique accounts for the reduction in amplitudes as the explosion depth approaches the free surface and less energy is coupled into the ground. We apply the method to the Humming Roadrunner series of shallow explosions in New Mexico where the yields and depths are known. Knowledge of the material properties is needed for both source coupling/excitation and the free surface effect. Although there is the expected trade-off between depth and yield, the estimated yields are close to the known values when the depth is constrained to the free surface. We then apply the method to a regionally recorded explosion in Syria. We estimate an explosive yield less than the 60 t claimed by sources in the open press. The modifications to the method allow us to apply the technique to new classes of events. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Pasyanos, Michael E AU - Ford, Sean R Y1 - 2015/05/28/ PY - 2015 DA - 2015 May 28 SP - 3786 EP - 3792 PB - American Geophysical Union, Washington, DC VL - 42 IS - 10 SN - 0094-8276, 0094-8276 KW - United States KW - P-waves KW - body waves KW - monitoring KW - explosions KW - Syria KW - elastic waves KW - New Mexico KW - seismic sources KW - depth KW - signals KW - propagation KW - seismic waves KW - seismic networks KW - seismic energy KW - nuclear explosions KW - Asia KW - earthquakes KW - Middle East KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793205110?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Determining+the+source+characteristics+of+explosions+near+the+Earth%27s+surface&rft.au=Pasyanos%2C+Michael+E%3BFord%2C+Sean+R&rft.aulast=Pasyanos&rft.aufirst=Michael&rft.date=2015-05-28&rft.volume=42&rft.issue=10&rft.spage=3786&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2015GL063624 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 - 22 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2016-06-02 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - amplitude; Asia; body waves; depth; earthquakes; elastic waves; explosions; Middle East; monitoring; New Mexico; nuclear explosions; P-waves; propagation; seismic energy; seismic networks; seismic sources; seismic waves; signals; Syria; United States DO - http://dx.doi.org/10.1002/2015GL063624 ER - TY - CPAPER T1 - Sequential Detection of Fission Processes for Harbor Defense T2 - 2015 OCEANS MTS/IEEE Conference AN - 1684404025; 6351436 JF - 2015 OCEANS MTS/IEEE Conference AU - Candy, James Y1 - 2015/05/18/ PY - 2015 DA - 2015 May 18 KW - Harbors UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1684404025?accountid=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+OCEANS+MTS%2FIEEE+Conference&rft.atitle=Sequential+Detection+of+Fission+Processes+for+Harbor+Defense&rft.au=Candy%2C+James&rft.aulast=Candy&rft.aufirst=James&rft.date=2015-05-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2015+OCEANS+MTS%2FIEEE+Conference&rft.issn=&rft_id=info:doi/ L2 - http://oceans15mtsieeegenova.org/glance.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-05-29 N1 - Last updated - 2015-06-01 ER - TY - CPAPER T1 - Broadband Particle Filtering in a Noisy Littoral Ocean T2 - 2015 OCEANS MTS/IEEE Conference AN - 1684395308; 6351613 JF - 2015 OCEANS MTS/IEEE Conference AU - Candy, James Y1 - 2015/05/18/ PY - 2015 DA - 2015 May 18 KW - Oceans KW - Particulates KW - Littoral zone UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1684395308?accountid=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+OCEANS+MTS%2FIEEE+Conference&rft.atitle=Broadband+Particle+Filtering+in+a+Noisy+Littoral+Ocean&rft.au=Candy%2C+James&rft.aulast=Candy&rft.aufirst=James&rft.date=2015-05-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2015+OCEANS+MTS%2FIEEE+Conference&rft.issn=&rft_id=info:doi/ L2 - http://oceans15mtsieeegenova.org/glance.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-05-29 N1 - Last updated - 2015-06-01 ER - TY - JOUR T1 - 2700 years of Mediterranean environmental change in central Italy; a synthesis of sedimentary and cultural records to interpret past impacts of climate on society AN - 1832652447; 740680-7 AB - Abrupt climate change in the past is thought to have disrupted societies by accelerating environmental degradation, potentially leading to cultural collapse. Linking climate change directly to societal disruption is challenging because socioeconomic factors also play a large role, with climate being secondary or sometimes inconsequential. Combining paleolimnologic, historical, and archaeological methods provides for a more secure basis for interpreting the past impacts of climate on society. We present pollen, non-pollen palynomorph, geochemical, paleomagnetic and sedimentary data from a high-resolution 2700 yr lake sediment core from central Italy and compare these data with local historical documents and archeological surveys to reconstruct a record of environmental change in relation to socioeconomic history and climatic fluctuations. Here we document cases in which environmental change is strongly linked to changes in local land management practices in the absence of clear climatic change, as well as examples when climate change appears to have been a strong catalyst that resulted in significant environmental change that impacted local communities. During the Imperial Roman period, despite a long period of stable, mild climate, and a large urban population in nearby Rome, our site shows only limited evidence for environmental degradation. Warm and mild climate during the Medieval Warm period, on the other hand, led to widespread deforestation and erosion. The ability of the Romans to utilize imported resources through an extensive trade network may have allowed for preservation of the environment near the Roman capital, whereas during medieval time, the need to rely on local resources led to environmental degradation. Cool wet climate during the Little Ice Age led to a breakdown in local land use practices, widespread land abandonment and rapid reforestation. Our results present a high-resolution regional case study that explores the effect of climate change on society for an under-documented region of Europe. Abstract Copyright (2015) Elsevier, B.V. JF - Quaternary Science Reviews AU - Mensing, Scott A AU - Tunno, Irene AU - Sagnotti, Leonardo AU - Florindo, Fabio AU - Noble, Paula AU - Archer, Claire AU - Zimmerman, Susan AU - Pavon-Carrasco, Francisco Javier AU - Cifani, Gabriele AU - Passigli, Susanna AU - Piovesan, Gianluca Y1 - 2015/05/15/ PY - 2015 DA - 2015 May 15 SP - 72 EP - 94 PB - Elsevier VL - 116 SN - 0277-3791, 0277-3791 KW - lithostratigraphy KW - isotopes KW - lead KW - Europe KW - magnetostratigraphy KW - paleoclimatology KW - Holocene KW - Italy KW - cores KW - climate change KW - Southern Europe KW - Cenozoic KW - radioactive isotopes KW - pollen KW - cesium KW - carbon KW - sediments KW - absolute age KW - miospores KW - charcoal KW - Quaternary KW - chronostratigraphy KW - biostratigraphy KW - human activity KW - alkali metals KW - central Italy KW - paleomagnetism KW - Lake Lungo KW - tephrostratigraphy KW - paleoenvironment KW - Cs-137 KW - metals KW - palynomorphs KW - lacustrine environment KW - reconstruction KW - C-14 KW - upper Holocene KW - microfossils KW - Pb-210 KW - lake sediments KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832652447?accountid=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=Quaternary+Science+Reviews&rft.atitle=2700+years+of+Mediterranean+environmental+change+in+central+Italy%3B+a+synthesis+of+sedimentary+and+cultural+records+to+interpret+past+impacts+of+climate+on+society&rft.au=Mensing%2C+Scott+A%3BTunno%2C+Irene%3BSagnotti%2C+Leonardo%3BFlorindo%2C+Fabio%3BNoble%2C+Paula%3BArcher%2C+Claire%3BZimmerman%2C+Susan%3BPavon-Carrasco%2C+Francisco+Javier%3BCifani%2C+Gabriele%3BPassigli%2C+Susanna%3BPiovesan%2C+Gianluca&rft.aulast=Mensing&rft.aufirst=Scott&rft.date=2015-05-15&rft.volume=116&rft.issue=&rft.spage=72&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2Fj.quascirev.2015.03.022 L2 - http://www.sciencedirect.com/science/journal/02773791 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 - 145 N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - absolute age; alkali metals; biostratigraphy; C-14; carbon; Cenozoic; central Italy; cesium; charcoal; chronostratigraphy; climate change; cores; Cs-137; Europe; Holocene; human activity; isotopes; Italy; lacustrine environment; Lake Lungo; lake sediments; lead; lithostratigraphy; magnetostratigraphy; metals; microfossils; miospores; paleoclimatology; paleoenvironment; paleomagnetism; palynomorphs; Pb-210; pollen; Quaternary; radioactive isotopes; reconstruction; sediments; Southern Europe; tephrostratigraphy; upper Holocene DO - http://dx.doi.org/10.1016/j.quascirev.2015.03.022 ER - TY - JOUR T1 - Geochimica et Cosmochimica Acta AN - 1692747617; 2015-061837 AB - In this reply we address remarks from Lovera et al. (2015) regarding experiments that we conducted on K-feldspar from Madagascar and their previously published diffusion experiments. Observations of curvature on Arrhenius plots obtained from multiple-domain K-feldspars, as discussed by Lovera et al. (2015), are consistent with the general conclusion of our paper that both sub-grain domains and structural modifications associated with laboratory heating cause deviations from linearity on Arrhenius plots. We review observations of non-linearity that are inconsistent with multiple-domain theory (e.g., upward curvature on plagioclase Arrhenius plots) to support our contention that structural transitions are an important consideration. Abstract Copyright (2015) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Cassata, W S AU - Renne, P R Y1 - 2015/05/15/ PY - 2015 DA - 2015 May 15 SP - 228 EP - 232 PB - Elsevier, New York, NY VL - 157 SN - 0016-7037, 0016-7037 KW - silicates KW - experimental studies KW - diffusion KW - K-feldspar KW - statistical analysis KW - argon KW - models KW - laboratory studies KW - alkali feldspar KW - noble gases KW - framework silicates KW - crystal chemistry KW - feldspar group KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692747617?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geochimica+et+Cosmochimica+Acta&rft.au=Cassata%2C+W+S%3BRenne%2C+P+R&rft.aulast=Cassata&rft.aufirst=W&rft.date=2015-05-15&rft.volume=157&rft.issue=&rft.spage=228&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2015.02.035 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 - 7 N1 - PubXState - NY N1 - Document feature - illus. N1 - SuppNotes - For reference to discussion see Lovera, O. M., et al., Geochimica et Cosmochimica Acta, Vol. 151, p. 168-171, 2015; for reference to original see Cassata, W. S. and Renne, P. R., Geochimica et Cosmochimica Acta, Vol. 112, p. 251-287, 2013 N1 - Last updated - 2015-07-02 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - alkali feldspar; argon; crystal chemistry; diffusion; experimental studies; feldspar group; framework silicates; K-feldspar; laboratory studies; models; noble gases; silicates; statistical analysis DO - http://dx.doi.org/10.1016/j.gca.2015.02.035 ER - TY - JOUR T1 - International monitoring system correlation detection at the North Korean nuclear test site at Punggye-ri with insights from the source physics experiment AN - 1686058468; 2015-052321 JF - Seismological Research Letters AU - Ford, Sean R AU - Walter, William R Y1 - 2015/05/06/ PY - 2015 DA - 2015 May 06 SP - 1160 EP - 1170, 11 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 4 SN - 0895-0695, 0895-0695 KW - monitoring KW - Far East KW - explosions KW - North Korea KW - correlation KW - seismic sources KW - Korea KW - information management KW - data management KW - detection KW - seismicity KW - algorithms KW - nuclear explosions KW - Asia KW - Punggye-ri North Korea KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686058468?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=International+monitoring+system+correlation+detection+at+the+North+Korean+nuclear+test+site+at+Punggye-ri+with+insights+from+the+source+physics+experiment&rft.au=Ford%2C+Sean+R%3BWalter%2C+William+R&rft.aulast=Ford&rft.aufirst=Sean&rft.date=2015-05-06&rft.volume=86&rft.issue=4&rft.spage=1160&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220150029 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 - 23 N1 - PubXState - CA N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - algorithms; Asia; correlation; data management; detection; explosions; Far East; information management; Korea; monitoring; North Korea; nuclear explosions; Punggye-ri North Korea; seismic sources; seismicity DO - http://dx.doi.org/10.1785/0220150029 ER - TY - JOUR T1 - Application of a pathogen microarray for the analysis of viruses and bacteria in clinical diagnostic samples from pigs AN - 1773832493; PQ0002584073 AB - Many of the disease syndromes challenging the commercial swine industry involve the analysis of complex problems caused by polymicrobial, emerging or reemerging, and transboundary pathogens. This study investigated the utility of the Lawrence Livermore Microbial Detection Array (Lawrence Livermore National Laboratory, Livermore, California), designed to detect 8,101 species of microbes, in the evaluation of known and unknown microbes in serum, oral fluid, and tonsil from pigs experimentally coinfected with Porcine reproductive and respiratory syndrome virus (PRRSV) and Porcine circovirus-2 (PCV-2). The array easily identified PRRSV and PCV-2, but at decreased sensitivities compared to standard polymerase chain reaction detection methods. The oral fluid sample was the most informative, possessing additional signatures for several swine-associated bacteria, including Streptococcus sp., Clostridium sp., and Staphylococcus sp. JF - Journal of Veterinary Diagnostic Investigation AU - Jaing, Crystal J AU - Thissen, James B AU - Gardner, Shea N AU - McLoughlin, Kevin S AU - Hullinger, Pam J AU - Monday, Nicholas A AU - Niederwerder, Megan C AU - Rowland, Raymond RR Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 313 EP - 325 PB - Sage Publications, Inc. VL - 27 IS - 3 SN - 1040-6387, 1040-6387 KW - Virology & AIDS Abstracts; Microbiology Abstracts B: Bacteriology KW - Bacteria KW - diagnostics KW - disease KW - microarray KW - microbial KW - pathogen KW - pigs KW - virus KW - Streptococcus KW - Clostridium KW - Porcine respiratory and reproductive syndrome virus KW - Tonsil KW - Staphylococcus KW - Polymerase chain reaction KW - Pathogens KW - oral fluids KW - J 02410:Animal Diseases KW - V 22410:Animal Diseases UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773832493?accountid=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+Veterinary+Diagnostic+Investigation&rft.atitle=Application+of+a+pathogen+microarray+for+the+analysis+of+viruses+and+bacteria+in+clinical+diagnostic+samples+from+pigs&rft.au=Jaing%2C+Crystal+J%3BThissen%2C+James+B%3BGardner%2C+Shea+N%3BMcLoughlin%2C+Kevin+S%3BHullinger%2C+Pam+J%3BMonday%2C+Nicholas+A%3BNiederwerder%2C+Megan+C%3BRowland%2C+Raymond+RR&rft.aulast=Jaing&rft.aufirst=Crystal&rft.date=2015-05-01&rft.volume=27&rft.issue=3&rft.spage=313&rft.isbn=&rft.btitle=&rft.title=Journal+of+Veterinary+Diagnostic+Investigation&rft.issn=10406387&rft_id=info:doi/10.1177%2F1040638715578484 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Number of references - 34 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Tonsil; Polymerase chain reaction; Pathogens; oral fluids; Streptococcus; Porcine respiratory and reproductive syndrome virus; Clostridium; Staphylococcus DO - http://dx.doi.org/10.1177/1040638715578484 ER - TY - JOUR T1 - Nuclear force adaptability for deterrence and assurance: a prudent alternative to minimum deterrence AN - 1710258734; 4702094 AB - This monograph, Nuclear Force Adaptability for Deterrence and Assurance: A Prudent Alternative to Minimum Deterrence, is the second in a series examining the U.S. goals of deterrence, extended deterrence and the assurance of allies, and how to think about the corresponding U.S. standards of adequacy for measuring 'how much is enough?' It begins by examining the manifest character of the contemporary threat environment in which the United States must pursue its strategic goals of deterring foes and assuring allies. Fortunately, there is considerable available evidence regarding the character of the contemporary threat environment and its general directions. Noted historians have compared this threat environment not to the bipolar Cold War, but to the highly dynamic threat environments leading to World War I and World War II. The uncertainties involved are daunting given the great diversity of hostile and potentially hostile states and non-state actors, leaderships, goals, perceptions, and forces that could be involved. Reprinted by permission of Taylor & Francis Ltd. JF - Comparative strategy AU - Payne, Keith B AU - Foster, John S AD - Missouri State University ; Lawrence Livermore National Laboratory Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 247 EP - 309 VL - 34 IS - 3 SN - 0149-5933, 0149-5933 KW - Political Science KW - Non-state actors KW - Cold War KW - World War One KW - Deterrence KW - Leadership KW - World War Two UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1710258734?accountid=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=Nuclear+force+adaptability+for+deterrence+and+assurance%3A+a+prudent+alternative+to+minimum+deterrence&rft.au=Payne%2C+Keith+B%3BFoster%2C+John+S&rft.aulast=Payne&rft.aufirst=Keith&rft.date=2015-05-01&rft.volume=34&rft.issue=3&rft.spage=247&rft.isbn=&rft.btitle=&rft.title=Comparative+strategy&rft.issn=01495933&rft_id=info:doi/10.1080%2F01495933.2015.1050292 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2015-09-09 N1 - Last updated - 2015-09-09 N1 - SubjectsTermNotLitGenreText - 3469 8782 13504 13501 1304 7805 3198 1077; 8724 12168 9008 12092 9720 6590; 2463 13443 2698 9934 476 8168 5889; 13741 13757 13443 2698; 13742 13757 13443 2698; 7271 1411 DO - http://dx.doi.org/10.1080/01495933.2015.1050292 ER - TY - JOUR T1 - A variance-based decomposition and global sensitivity index method for uncertainty quantification: Application to retrieved ice cloud properties AN - 1709725803; PQ0001664719 AB - This study develops a novel uncertainty quantification (UQ) method for cloud microphysical property retrievals using variance-based decomposition and global sensitivity index. In this UQ framework, empirical orthogonal function (EOF) analysis is applied to the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) ground-based observations, which are the inputs for the cloud retrieval studied here. The principal components (PCs) in the EOF expansion are parameterized as random input variables, and hence, the input dimension is greatly reduced (up to a factor of 50), allowing large ensemble of random samplings. The EOF expansion improves the accuracy of the uncertainty estimation by taking into account the cross correlations in the input data profiles. This method enables a probabilistic representation of a retrieval process by adding normally distributed perturbations into PCs of sample means of input data profiles within a time window. Therefore, it effectively facilitates objective validation of climate models against cloud retrievals under a probabilistic framework for rigorous statistical inferences. Moreover, the variance-based global sensitivity index analysis, part of this method, attributes the output uncertainties to each individual source, thus providing directions for improving retrieval algorithms and observation strategies. For demonstration, we apply this method to quantify the uncertainties of the ARM program's baseline cloud retrieval algorithm for an ice cloud case observed at the Southern Great Plains site on 9 March 2000. Key Points * Propose a general UQ and sensitivity analysis framework for cloud retrievals * Improve knowledge of the vertically resolved cloud retrieval uncertainties * Provide insights to improve the retrieval and model evaluation and calibration JF - Journal of Geophysical Research: Atmospheres AU - Chen, Xiao AU - Tang, Qi AU - Xie, Shaocheng AU - Zhao, Chuanfeng AD - Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 4234 EP - 4247 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 120 IS - 9 SN - 2169-897X, 2169-897X KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Clouds KW - Uncertainty KW - Mathematical models KW - Probabilistic methods KW - Retrieval KW - Probability theory KW - Algorithms KW - Decomposition UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709725803?accountid=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=A+variance-based+decomposition+and+global+sensitivity+index+method+for+uncertainty+quantification%3A+Application+to+retrieved+ice+cloud+properties&rft.au=Chen%2C+Xiao%3BTang%2C+Qi%3BXie%2C+Shaocheng%3BZhao%2C+Chuanfeng&rft.aulast=Chen&rft.aufirst=Xiao&rft.date=2015-05-01&rft.volume=120&rft.issue=9&rft.spage=4234&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2014JD022750 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1002/2014JD022750 ER - TY - JOUR T1 - CO (sub 2) storage and utilization AN - 1700098626; 2015-073922 JF - Interpretation (Tulsa) AU - Sullivan, Charlotte AU - Bonneville, Alain AU - Harbert, William AU - Gupta, Neeraj AU - Nieuwland, Dirk AU - Morris, Joseph Y1 - 2015/05// PY - 2015 DA - May 2015 SP - SM1 EP - SM55 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 3 IS - 2 SN - 2324-8858, 2324-8858 KW - utilization KW - carbon sequestration KW - gas storage KW - carbon dioxide KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700098626?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=CO+%28sub+2%29+storage+and+utilization&rft.au=Sullivan%2C+Charlotte%3BBonneville%2C+Alain%3BHarbert%2C+William%3BGupta%2C+Neeraj%3BNieuwland%2C+Dirk%3BMorris%2C+Joseph&rft.aulast=Sullivan&rft.aufirst=Charlotte&rft.date=2015-05-01&rft.volume=3&rft.issue=2&rft.spage=SM1&rft.isbn=&rft.btitle=&rft.title=Interpretation+%28Tulsa%29&rft.issn=23248858&rft_id=info:doi/ L2 - http://library.seg.org/journal/inteio LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - PubXState - OK N1 - SuppNotes - Individual papers are cited separately N1 - Last updated - 2015-07-30 N1 - SubjectsTermNotLitGenreText - carbon dioxide; carbon sequestration; gas storage; utilization ER - TY - JOUR T1 - Characterization of a fracture zone using seismic attributes at the In Salah CO (sub 2) storage project AN - 1700098244; 2015-073925 AB - The In Salah carbon dioxide storage project in Algeria has injected more than 3 million tons of carbon dioxide into a water-filled tight-sand formation. During injection, interferometric synthetic aperture radar (InSAR) reveals a double-lobed pattern of up to a 20-mm surface uplift above the horizontal leg of an injection well. Interpretation of 3D seismic data reveals the presence of a subtle linear push-down feature located along the InSAR determined surface depression between the two lobes, which we interpreted to have to be caused by anomalously lower velocity from the fracture zone and the presence of CO (sub 2) displacing brine in this feature. To enhance the seismic interpretation, we calculated many poststack seismic attributes, including positive and negative curvatures as well as ant track, from the 3D seismic data. The maximum positive curvature attributes and ant track found the clearest linear features, with two parallel trends, which agreed well with the ant-track volume and the InSAR observations of the depression zone. The seismic attributes provided a plausible characterization of the fracture zone extent, including height, width, and length (80, 350, and 3500 m, respectively), providing important information for further study of fracture behavior due to the CO (sub 2) injection at In Salah. We interpreted the pattern of depression between two surface-deformation lobes as caused by the opening of a subvertical fracture or damage zone at depth above the injection interval, which allowed injected Co (sub 2) to migrate upward. Our analysis corroborated previous interpretation of surface uplift as due to the injection of CO (sub 2) in this well. JF - Interpretation (Tulsa) AU - Zhang, Rui AU - Vasco, Donald AU - Daley, Thomas M AU - Harbert, William AU - Sullivan, Charlotte AU - Bonneville, Alain AU - Gupta, Neeraj AU - Nieuwland, Dirk AU - Morris, Joseph Y1 - 2015/05// PY - 2015 DA - May 2015 SP - SM37 EP - SM46 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 3 IS - 2 SN - 2324-8858, 2324-8858 KW - geophysical surveys KW - North Africa KW - uplifts KW - characterization KW - gas storage KW - tight sands KW - observations KW - carbon dioxide KW - SAR KW - quantitative analysis KW - applications KW - interpretation KW - seismic attributes KW - seismic profiles KW - carbon sequestration KW - three-dimensional models KW - geophysical methods KW - radar methods KW - In Salah Algeria KW - deformation KW - seismic methods KW - fracture zones KW - surveys KW - Africa KW - geophysical profiles KW - InSAR KW - Algeria KW - permeability KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700098244?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Characterization+of+a+fracture+zone+using+seismic+attributes+at+the+In+Salah+CO+%28sub+2%29+storage+project&rft.au=Zhang%2C+Rui%3BVasco%2C+Donald%3BDaley%2C+Thomas+M%3BHarbert%2C+William%3BSullivan%2C+Charlotte%3BBonneville%2C+Alain%3BGupta%2C+Neeraj%3BNieuwland%2C+Dirk%3BMorris%2C+Joseph&rft.aulast=Zhang&rft.aufirst=Rui&rft.date=2015-05-01&rft.volume=3&rft.issue=2&rft.spage=SM37&rft.isbn=&rft.btitle=&rft.title=Interpretation+%28Tulsa%29&rft.issn=23248858&rft_id=info:doi/10.1190%2FINT-2014-0141.1 L2 - http://library.seg.org/journal/inteio 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 - 21 N1 - PubXState - OK N1 - Document feature - illus. incl. strat. col., sects., 1 table, sketch map N1 - Last updated - 2015-11-19 N1 - SubjectsTermNotLitGenreText - Africa; Algeria; applications; carbon dioxide; carbon sequestration; characterization; deformation; fracture zones; gas storage; geophysical methods; geophysical profiles; geophysical surveys; In Salah Algeria; InSAR; interpretation; North Africa; observations; permeability; quantitative analysis; radar methods; SAR; seismic attributes; seismic methods; seismic profiles; surveys; three-dimensional models; tight sands; uplifts DO - http://dx.doi.org/10.1190/INT-2014-0141.1 ER - TY - JOUR T1 - Fitting top seal topography and CO (sub 2) layer thickness to time-lapse seismic amplitude maps at Sleipner AN - 1700098196; 2015-073926 AB - Injected CO (sub 2) at the Sleipner storage site is migrating into several thin layers. Using a tuning relationship, two different layer thicknesses can give the same reflection amplitude, and it is then not possible to go from amplitudes to CO (sub 2) layer thicknesses without further constraints. Exploiting spatial and time-lapse dependencies in the reflection amplitude maps makes it possible to resolve this ambiguity and create layer thickness maps when the CO (sub 2) flow is gravity dominated. The topography of the sealing cap rock was used as an optimization parameter. Tests were done on synthetic data and real data from the Sleipner CO (sub 2) injection. The resulting topography map for the Sleipner case deviated by 5.3 m on average from simple time-depth mapping, which is within the mapping uncertainty. Although the predictive power is limited, outputs of the method can be used to check if the flow matches a gravity-dominated model or if other flow mechanisms are needed to explain the observations. JF - Interpretation (Tulsa) AU - Kiaer, Anders Fredrik AU - Sullivan, Charlotte AU - Bonneville, Alain AU - Harbert, William AU - Gupta, Neeraj AU - Nieuwland, Dirk AU - Morris, Joseph Y1 - 2015/05// PY - 2015 DA - May 2015 SP - SM47 EP - SM55 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 3 IS - 2 SN - 2324-8858, 2324-8858 KW - geophysical surveys KW - natural gas KW - petroleum KW - mapping KW - gas storage KW - exploitation KW - elastic waves KW - oil and gas fields KW - observations KW - carbon dioxide KW - topography KW - thickness KW - Sleipner Field KW - seismic profiles KW - carbon sequestration KW - geophysical methods KW - equations KW - seismic methods KW - models KW - history KW - gas injection KW - surveys KW - geophysical profiles KW - North Sea KW - North Atlantic KW - Atlantic Ocean KW - amplitude 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/1700098196?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Fitting+top+seal+topography+and+CO+%28sub+2%29+layer+thickness+to+time-lapse+seismic+amplitude+maps+at+Sleipner&rft.au=Kiaer%2C+Anders+Fredrik%3BSullivan%2C+Charlotte%3BBonneville%2C+Alain%3BHarbert%2C+William%3BGupta%2C+Neeraj%3BNieuwland%2C+Dirk%3BMorris%2C+Joseph&rft.aulast=Kiaer&rft.aufirst=Anders&rft.date=2015-05-01&rft.volume=3&rft.issue=2&rft.spage=SM47&rft.isbn=&rft.btitle=&rft.title=Interpretation+%28Tulsa%29&rft.issn=23248858&rft_id=info:doi/10.1190%2FINT-2014-0127.1 L2 - http://library.seg.org/journal/inteio 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 - 12 N1 - PubXState - OK N1 - Document feature - illus. incl. sect., sketch map N1 - Last updated - 2015-07-30 N1 - SubjectsTermNotLitGenreText - amplitude; Atlantic Ocean; carbon dioxide; carbon sequestration; elastic waves; equations; exploitation; gas injection; gas storage; geophysical methods; geophysical profiles; geophysical surveys; history; mapping; models; natural gas; North Atlantic; North Sea; observations; oil and gas fields; petroleum; seismic methods; seismic profiles; Sleipner Field; surveys; thickness; topography DO - http://dx.doi.org/10.1190/INT-2014-0127.1 ER - TY - JOUR T1 - Surface geochemical measurements applied to monitoring, verification, and accounting of leakage from sequestration projects AN - 1700098136; 2015-073923 AB - A detailed study of CO (sub 2) and CH (sub 4) surface fluxes, shallow soil gas composition, 10-m hole soil gas composition was made at Rangely, Colorado, Teapot Dome, Wyoming, USA, and the results of geochemical verification measurements at Weyburn, Saskatchewan, Canada. Summer and winter soil gas and gas flux measurements were made at Rangely, and winter only at Teapot Dome. The objectives were to determine if leakage of CO (sub 2) and/or CH (sub 4) could be detected in the overpressured Rangely and the underpressured Teapot Dome systems. At Weyburn, the objective was the determination of the presence or absence of an alleged leak. Seasonal surface CO (sub 2) fluxes at Rangely were similar at on-field locations and an off-field control area. Methane fluxes were much higher at on-field locations than in the control area, suggesting a reservoir source. Seasonal differences in CH (sub 4) fluxes suggested methanotrophic oxidation was occurring in the soils. Shallow soil gas concentration measurements of CO (sub 2) were similar at a 100-cm depth, on-field and in the control area. Methane soil gas concentrations were higher on-field than in the control area; summer and winter. These data were used to select locations with and without evidence for seepage allowing nested sampling up to a 10-m depth. More complex chemical and isotopic measurements were made in 10-m holes at Rangely and Teapot Dome. Methanotrophy was operational at the active Rangely and the passive Teapot Dome systems. A small methane leakage rate of 400-700 tonnes year (super -1) and CO (sub 2) of < 170 tonnes year (super -1) were determined at Rangely, and rates near zero at Teapot Dome. Inert gases, carbon-containing gases, as well as isotopic ratios supported the presence of pathways at geochemically anomalous locations at Teapot Dome. Measurements of soil gas and inert gas isotopes in shallow groundwater by other authors at Weyburn, Saskatchewan, found no evidence of leakage. JF - Interpretation (Tulsa) AU - Klusman, Ronald W AU - Sullivan, Charlotte AU - Bonneville, Alain AU - Harbert, William AU - Gupta, Neeraj AU - Nieuwland, Dirk AU - Morris, Joseph Y1 - 2015/05// PY - 2015 DA - May 2015 SP - SM1 EP - SM21 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 3 IS - 2 SN - 2324-8858, 2324-8858 KW - United States KW - oxygen KW - aliphatic hydrocarbons KW - seepage KW - oil and gas fields KW - nitrogen KW - carbon dioxide KW - underpressure KW - Weyburn Field KW - geochemical anomalies KW - Rangely Colorado KW - geochemistry KW - Teapot Dome KW - monitoring KW - methane KW - carbon sequestration KW - alkanes KW - measurement KW - Wyoming KW - organic compounds KW - Canada KW - hydrocarbons KW - Western Canada KW - seasonal variations KW - greenhouse gases KW - Rio Blanco County Colorado KW - Colorado KW - soil gases KW - Saskatchewan KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700098136?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Surface+geochemical+measurements+applied+to+monitoring%2C+verification%2C+and+accounting+of+leakage+from+sequestration+projects&rft.au=Klusman%2C+Ronald+W%3BSullivan%2C+Charlotte%3BBonneville%2C+Alain%3BHarbert%2C+William%3BGupta%2C+Neeraj%3BNieuwland%2C+Dirk%3BMorris%2C+Joseph&rft.aulast=Klusman&rft.aufirst=Ronald&rft.date=2015-05-01&rft.volume=3&rft.issue=2&rft.spage=SM1&rft.isbn=&rft.btitle=&rft.title=Interpretation+%28Tulsa%29&rft.issn=23248858&rft_id=info:doi/10.1190%2FINT-2014-0093.1 L2 - http://library.seg.org/journal/inteio 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 - 65 N1 - PubXState - OK N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-07-30 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; Canada; carbon dioxide; carbon sequestration; Colorado; geochemical anomalies; geochemistry; greenhouse gases; hydrocarbons; measurement; methane; monitoring; nitrogen; oil and gas fields; organic compounds; oxygen; Rangely Colorado; Rio Blanco County Colorado; Saskatchewan; seasonal variations; seepage; soil gases; Teapot Dome; underpressure; United States; Western Canada; Weyburn Field; Wyoming DO - http://dx.doi.org/10.1190/INT-2014-0093.1 ER - TY - JOUR T1 - Rock-physics-based double-difference inversion for CO (sub 2) saturation and porosity at the Cranfield CO (sub 2) injection site AN - 1700097911; 2015-073924 AB - Large-scale subsurface injection of CO (sub 2) has the potential to reduce emissions of atmospheric CO (sub 2) and improve oil recovery. Studying the effects of injected CO (sub 2) on the elastic properties of the saturated reservoir rock can help to improve long-term monitoring effectiveness and accuracy at locations undergoing CO (sub 2) injection. We used two vintages of existing 3D surface seismic data and well logs to probabilistically invert for the CO (sub 2) saturation and porosity at the Cranfield reservoir using a double-difference approach. The first step of this work was to calibrate the rock-physics model to the well-log data. Next, the baseline and time-lapse seismic data sets were inverted for acoustic impedance CO (sub 2) using a high-resolution basis pursuit inversion technique. The reservoir porosity was derived statistically from the rock-physics model based on the CO (sub 2) estimates inverted from the baseline survey. The porosity estimates were used in the double-difference routine as the fixed initial model from which CO (sub 2) saturation was then estimated from the time-lapse CO (sub 2) data. Porosity was assumed to remain constant between survey vintages; therefore, the changes between the baseline and time-lapse CO (sub 2) data may be inverted for CO (sub 2) saturation from the injection activities using the calibrated rock-physics model. Comparisons of inverted and measured porosity from well logs indicated quite accurate results. Estimates of CO (sub 2) saturation found less accuracy than the porosity estimates. JF - Interpretation (Tulsa) AU - Carter, Russell W AU - Spikes, Kyle T AU - Sullivan, Charlotte AU - Bonneville, Alain AU - Harbert, William AU - Gupta, Neeraj AU - Nieuwland, Dirk AU - Morris, Joseph Y1 - 2015/05// PY - 2015 DA - May 2015 SP - SM23 EP - SM35 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 3 IS - 2 SN - 2324-8858, 2324-8858 KW - United States KW - Cretaceous KW - siliciclastics KW - petroleum KW - production KW - Upper Cretaceous KW - reservoir rocks KW - carbon dioxide KW - Adams County Mississippi KW - Cranfield Mississippi KW - Tuscaloosa Formation KW - North America KW - double-difference method KW - carbon sequestration KW - well logs KW - Mississippi KW - inverse problem KW - Gulf Coastal Plain KW - porosity KW - Mesozoic KW - models KW - history KW - gas injection KW - saturation KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700097911?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Rock-physics-based+double-difference+inversion+for+CO+%28sub+2%29+saturation+and+porosity+at+the+Cranfield+CO+%28sub+2%29+injection+site&rft.au=Carter%2C+Russell+W%3BSpikes%2C+Kyle+T%3BSullivan%2C+Charlotte%3BBonneville%2C+Alain%3BHarbert%2C+William%3BGupta%2C+Neeraj%3BNieuwland%2C+Dirk%3BMorris%2C+Joseph&rft.aulast=Carter&rft.aufirst=Russell&rft.date=2015-05-01&rft.volume=3&rft.issue=2&rft.spage=SM23&rft.isbn=&rft.btitle=&rft.title=Interpretation+%28Tulsa%29&rft.issn=23248858&rft_id=info:doi/10.1190%2FINT-2014-0123.1 L2 - http://library.seg.org/journal/inteio 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 - 38 N1 - PubXState - OK N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2015-07-30 N1 - SubjectsTermNotLitGenreText - Adams County Mississippi; carbon dioxide; carbon sequestration; Cranfield Mississippi; Cretaceous; double-difference method; gas injection; Gulf Coastal Plain; history; inverse problem; Mesozoic; Mississippi; models; North America; petroleum; porosity; production; reservoir rocks; saturation; siliciclastics; Tuscaloosa Formation; United States; Upper Cretaceous; well logs DO - http://dx.doi.org/10.1190/INT-2014-0123.1 ER - TY - JOUR T1 - Darkening of Mercury's surface by cometary carbon AN - 1692747587; 2015-061872 JF - Nature Geoscience AU - Syal, Megan Bruck AU - Schultz, Peter H AU - Riner, Miriam A Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 352 EP - 356 PB - Nature Publishing Group, London VL - 8 IS - 5 SN - 1752-0894, 1752-0894 KW - surface properties KW - iron minerals KW - Moon KW - cosmochemistry KW - X-ray spectra KW - weathering KW - terrestrial planets KW - brightness KW - planets KW - micrometeorites KW - meteorites KW - space weathering KW - comets KW - metals KW - carbon KW - Mercury Planet KW - spectra KW - MESSENGER Mission KW - geochemistry KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692747587?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Darkening+of+Mercury%27s+surface+by+cometary+carbon&rft.au=Syal%2C+Megan+Bruck%3BSchultz%2C+Peter+H%3BRiner%2C+Miriam+A&rft.aulast=Syal&rft.aufirst=Megan&rft.date=2015-05-01&rft.volume=8&rft.issue=5&rft.spage=352&rft.isbn=&rft.btitle=&rft.title=Nature+Geoscience&rft.issn=17520894&rft_id=info:doi/10.1038%2FNGEO2397 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 - 30 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-11-19 N1 - SubjectsTermNotLitGenreText - brightness; carbon; comets; cosmochemistry; geochemistry; iron minerals; Mercury Planet; MESSENGER Mission; metals; meteorites; micrometeorites; Moon; planets; space weathering; spectra; surface properties; terrestrial planets; weathering; X-ray spectra DO - http://dx.doi.org/10.1038/NGEO2397 ER - TY - JOUR T1 - Crustal and uppermost mantle structure in the Middle East; assessing constraints provided by jointly modelling Ps and Sp receiver functions and Rayleigh wave group velocity dispersion curves AN - 1692742569; 2015-060505 AB - Seismic velocity models are found, along with uncertainty estimates, for 11 sites in the Middle East by jointly modeling Ps and Sp receiver functions and surface (Rayleigh) wave group velocity dispersion. The approach performs a search for models that satisfy goodness-of-fit criteria guided by a variant of simulated annealing and uses statistical tools to assess these products of searches. These tools, a parameter correlation matrix and marginal posterior probability density (PPD) function, allow us to evaluate quantitatively the constraints that each data type imposes on model parameters and to identify portions of each model that are well-constrained relative to other portions. This joint modelling technique, which we call "multi-objective optimization for seismology", does not require a good starting solution, although such a model can be incorporated easily, if available, and can reduce the computation time significantly. Applying the process described above to broadband seismic data reveals that crustal thickness varies from 15 km beneath Djibouti (station ATD) to 45 km beneath Saudi Arabia (station RAYN). A pronounced low velocity zone for both V (sub p) and V (sub s) is present at a depth of approximately 12 km beneath station KIV located in northern part of Greater Caucasus, which may be due to the presence of a relatively young volcano. Similarly, we also noticed a 6-km-thick low velocity zone for V (sub p) beginning at 20 km depth beneath seismic station AGIN, on the Anatolian Plateau, while positive velocity gradients prevail elsewhere in eastern Turkey. Beneath station CSS, located in Cyprus, an anomalously slow layer is found in the uppermost mantle, which may indicate the presence of altered lithospheric material. Crustal P- and S-wave velocities beneath station D2, located in the northeastern portion of central Zagros, range between 5.2-6.2 and 3.2-3.8 km s (super -1) , respectively. In Oman, we find a Moho depth of 34.0 + or - 1.0 km and 25.0 + or - 1.0 to 30.0 + or - 1.0 km beneath stations S02 and S04, respectively. JF - Geophysical Journal International AU - Agrawal, Mohit AU - Pulliam, Jay AU - Sen, Mrinal K AU - Dutta, Utpal AU - Pasyanos, Michael E AU - Mellors, Robert Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 783 EP - 810 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 - P-waves KW - Saudi Arabia KW - receiver functions KW - East Africa KW - mantle KW - elastic waves KW - low-velocity zones KW - attenuation KW - surface waves KW - seismicity KW - Cyprus KW - velocity KW - thickness KW - probability KW - algorithms KW - Djibouti KW - Asia KW - uncertainty KW - Middle East KW - upper mantle KW - body waves KW - time series analysis KW - guided waves KW - lithosphere KW - Oman KW - statistical analysis KW - Rayleigh waves KW - Mohorovicic discontinuity KW - models KW - Arabian Peninsula KW - velocity structure KW - Africa KW - seismic waves KW - seismic networks KW - earthquakes KW - S-waves KW - crust KW - 19:Seismology KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742569?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Crustal+and+uppermost+mantle+structure+in+the+Middle+East%3B+assessing+constraints+provided+by+jointly+modelling+Ps+and+Sp+receiver+functions+and+Rayleigh+wave+group+velocity+dispersion+curves&rft.au=Agrawal%2C+Mohit%3BPulliam%2C+Jay%3BSen%2C+Mrinal+K%3BDutta%2C+Utpal%3BPasyanos%2C+Michael+E%3BMellors%2C+Robert&rft.aulast=Agrawal&rft.aufirst=Mohit&rft.date=2015-05-01&rft.volume=201&rft.issue=2&rft.spage=783&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggv050 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 - 107 N1 - Document feature - illus. incl. geol. sketch map N1 - Last updated - 2015-07-02 N1 - SubjectsTermNotLitGenreText - Africa; algorithms; Arabian Peninsula; Asia; attenuation; body waves; crust; Cyprus; Djibouti; earthquakes; East Africa; elastic waves; guided waves; lithosphere; low-velocity zones; mantle; Middle East; models; Mohorovicic discontinuity; Oman; P-waves; probability; Rayleigh waves; receiver functions; S-waves; Saudi Arabia; seismic networks; seismic waves; seismicity; statistical analysis; surface waves; thickness; time series analysis; uncertainty; upper mantle; velocity; velocity structure DO - http://dx.doi.org/10.1093/gji/ggv050 ER - TY - JOUR T1 - Chemical tagging of chlorinated phenols for their facile detection and analysis by NMR spectroscopy. AN - 1674959004; 25796530 AB - A derivatization method that employs diethyl (bromodifluoromethyl) phosphonate (DBDFP) to efficiently tag the endocrine disruptor pentachlorophenol (PCP) and other chlorinated phenols (CPs) along with their reliable detection and analysis by NMR is presented. The method accomplishes the efficient alkylation of the hydroxyl group in CPs with the difluoromethyl (CF2H) moiety in extremely rapid fashion (5 min), at room temperature and in an environmentally benign manner. The approach proved successful in difluoromethylating a panel of 18 chlorinated phenols, yielding derivatives that displayed unique (1)H, (19)F, and (13)C NMR spectra allowing for the clear discrimination between isomerically related CPs. Due to its biphasic nature, the derivatization can be applied to both aqueous and organic mixtures where the analysis of CPs is required. Furthermore, the methodology demonstrates that PCP along with other CPs can be selectively derivatized in the presence of other various aliphatic alcohols, underscoring the superiority of the approach over other general derivatization methods that indiscriminately modify all analytes in a given sample. The present work demonstrates the first application of NMR on the qualitative analysis of these highly toxic and environmentally persistent species. JF - Analytical and bioanalytical chemistry AU - Valdez, Carlos A AU - Leif, Roald N AD - Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, 7000 East Avenue, L-091, Livermore, CA, 94550, USA, valdez11@llnl.gov. Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 3539 EP - 3543 VL - 407 IS - 13 KW - Chlorophenols KW - 0 KW - Endocrine Disruptors KW - Fluorine Radioisotopes KW - 4-chlorophenol KW - 3DLC36A01X KW - Index Medicus KW - Sensitivity and Specificity KW - Reproducibility of Results KW - Fluorine Radioisotopes -- analysis KW - Isotope Labeling -- methods KW - Fluorine Radioisotopes -- chemistry KW - Chlorophenols -- analysis KW - Proton Magnetic Resonance Spectroscopy -- methods KW - Chlorophenols -- chemistry KW - Endocrine Disruptors -- analysis KW - Endocrine Disruptors -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1674959004?accountid=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=Analytical+and+bioanalytical+chemistry&rft.atitle=Chemical+tagging+of+chlorinated+phenols+for+their+facile+detection+and+analysis+by+NMR+spectroscopy.&rft.au=Valdez%2C+Carlos+A%3BLeif%2C+Roald+N&rft.aulast=Valdez&rft.aufirst=Carlos&rft.date=2015-05-01&rft.volume=407&rft.issue=13&rft.spage=3539&rft.isbn=&rft.btitle=&rft.title=Analytical+and+bioanalytical+chemistry&rft.issn=1618-2650&rft_id=info:doi/10.1007%2Fs00216-015-8625-2 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-01-07 N1 - Date created - 2015-04-21 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1007/s00216-015-8625-2 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 - Prebiotic hydrocarbon synthesis in impacting reduced astrophysical icy mixtures AN - 1832624078; 741333-44 AB - We present results of prebiotic organic synthesis in shock-compressed reducing mixtures of simple ices from quantum molecular dynamics simulations extended to close to chemical equilibrium timescales. Given the relative abundance of carbon in reduced forms in astrophysical ices as well as the tendency of these mixtures to form complex hydrocarbons under the presence of external stimuli, it is possible that cometary impacts on a planetary surface could have yielded a larger array of prebiotic organic compounds than previously investigated. We find that the high pressures and temperatures due to shock compression yield a large assortment of carbon- and nitrogen-bonded extended structures that are highly reactive with short molecular lifetimes. Expansion and cooling causes these materials to break apart and form a wide variety of stable, potentially life-building compounds, including long-chain linear and branched hydrocarbons, large heterocyclic compounds, and a variety of different amines and exotic amino acids. Our results help provide a bottom-up understanding of hydrocarbon impact synthesis on the early Earth and its role in producing life-building molecules from simple starting materials. Copyright (Copyright) 2015. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Koziol, Lucas AU - Goldman, Nir Y1 - 2015/04/20/ PY - 2015 DA - 2015 Apr 20 EP - Paper no. 91 PB - IOP Publishing for American Astronomical Society, Bristol VL - 803 IS - 2 SN - 0004-637X, 0004-637X KW - expansion KW - prebiotic chemistry KW - astrobiology KW - bonding KW - simulation KW - temperature KW - nitrogen KW - amines KW - ice KW - carbon KW - amino acids KW - cooling KW - hydrogen cyanide KW - molecular dynamics KW - thermodynamic properties KW - synthesis KW - compression KW - shock waves KW - pressure KW - condensation KW - glycine KW - metamorphism KW - high pressure KW - equilibrium KW - planets KW - organic compounds KW - organic acids KW - hydrocarbons KW - peptides KW - proteins KW - shock metamorphism KW - high temperature KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832624078?accountid=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=The+Astrophysical+Journal&rft.atitle=Prebiotic+hydrocarbon+synthesis+in+impacting+reduced+astrophysical+icy+mixtures&rft.au=Koziol%2C+Lucas%3BGoldman%2C+Nir&rft.aulast=Koziol&rft.aufirst=Lucas&rft.date=2015-04-20&rft.volume=803&rft.issue=2&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F803%2F2%2F91 L2 - http://iopscience.iop.org/0004-637X 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 IOP Publishing Ltd., London, United Kingdom N1 - Number of references - 76 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - amines; amino acids; astrobiology; bonding; carbon; compression; condensation; cooling; equilibrium; expansion; glycine; high pressure; high temperature; hydrocarbons; hydrogen cyanide; ice; metamorphism; molecular dynamics; nitrogen; organic acids; organic compounds; peptides; planets; prebiotic chemistry; pressure; proteins; shock metamorphism; shock waves; simulation; synthesis; temperature; thermodynamic properties DO - http://dx.doi.org/10.1088/0004-637X/803/2/91 ER - TY - JOUR T1 - Paleotemperatures at the lunar surfaces from open system behavior of cosmogenic (super 38) Ar and radiogenic (super 40) Ar AN - 1680752911; 2015-041796 AB - The simultaneous diffusion of both cosmogenic (super 38) Ar and radiogenic (super 40) Ar from solid phases is controlled by the thermal conditions of rocks while residing near planetary surfaces. Combined observations of (super 38) Ar/ (super 37) Ar and (super 40) Ar/ (super 39) Ar ratios during stepwise degassing analyses of neutron-irradiated Apollo samples can distinguish between diffusive loss of Ar due to solar heating of the rocks and that associated with elevated temperatures during or following impact events; the data provide quantitative constraints on the durations and temperatures of each process. From sequentially degassed (super 38) Ar/ (super 37) Ar ratios can be calculated a spectrum of apparent (super 38) Ar exposure ages versus the cumulative release fraction of (super 37) Ar, which is particularly sensitive to conditions at the lunar surface typically over approximately 10 (super 6) -10 (super 8) year timescales. Due to variable proportions of K- and Ca-bearing glass, plagioclase and pyroxene, with variability in the grain sizes of these phases, each sample will have distinct sensitivity to, and therefore different resolving power on, past near-surface thermal conditions. We present the underlying assumptions, and the analytical and numerical methods used to quantify the Ar diffusion kinetics in multi-phase whole-rock analyses that provide these constraints. For Apollo 15 samples 15016, 15556, and 15596 we find apparent (super 40) Ar/ (super 39) Ar plateau ages between 3.21 and 3.28 Ga and evidence for diffusive loss of radiogenic (super 40) Ar primarily from K-bearing glass. From (super 38) Ar/ (super 37) Ar spectra normalized to the apparent Ca/K ratios, we also find evidence of diffusive loss of cosmogenic (super 38) Ar that requires elevated temperatures either during or after surface exposure. Using (super 39) Ar and (super 37) Ar, we construct multiple-phase-multiple diffusion domain (MP-MDD) models to quantify the diffusion kinetics of Ar from a range of macroscopic grain sizes of each phase. While diffusive loss of (super 40) Ar can be explained by brief reheating conditions after crystallization (e.g., during an impact event), we find that both the radiogenic (super 40) Ar and cosmogenic (super 38) Ar abundances can be explained by internally consistent thermal conditions expected for solar heating of the rocks at the lunar surface. These conditions correspond to effective diffusion temperatures (EDT, i.e., the temperature corresponding to the mean diffusivity over temperature variability) between 65 and 81 degrees C, with an error-weighted mean of 77.0 + or - 1.3 degrees C, despite differences in diffusion kinetics and large differences in surface exposure duration between the three samples ( approximately 56-621 Ma). This EDT corresponds to a maximum daytime temperature of approximately 96 degrees C, which is in excellent agreement direct measurements of temperature at the Apollo 15 landing site. The open system behavior in both a radiogenic and a cosmogenic nuclide provides tests for internal consistency in best-fitting solutions of time-integrated thermal conditions of rocks collected from planetary surfaces. This thermal information is important for the study of habitable conditions at planetary surfaces, and has implications for Ar-based geochronology and paleomagnetic observations applied to planetary materials. Abstract Copyright (2015) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Shuster, David L AU - Cassata, William S Y1 - 2015/04/15/ PY - 2015 DA - 2015 Apr 15 SP - 154 EP - 171 PB - Elsevier, New York, NY VL - 155 SN - 0016-7037, 0016-7037 KW - isotopes KW - magnetization KW - cosmogenic elements KW - Apollo Program KW - Ar-38 KW - thermal history KW - stable isotopes KW - electron probe data KW - radioactive isotopes KW - Ar-40 KW - remanent magnetization KW - dates KW - paleotemperature KW - noble gases KW - absolute age KW - satellites KW - rocks KW - kinetics KW - geochemistry KW - Ar/Ar KW - Moon KW - paleomagnetism KW - cosmochemistry KW - argon KW - models KW - lunar samples KW - mathematical methods KW - Apollo 15 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680752911?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Paleotemperatures+at+the+lunar+surfaces+from+open+system+behavior+of+cosmogenic+%28super+38%29+Ar+and+radiogenic+%28super+40%29+Ar&rft.au=Shuster%2C+David+L%3BCassata%2C+William+S&rft.aulast=Shuster&rft.aufirst=David&rft.date=2015-04-15&rft.volume=155&rft.issue=&rft.spage=154&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2015.01.037 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 - 69 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-10-25 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - absolute age; Apollo 15; Apollo Program; Ar-38; Ar-40; Ar/Ar; argon; cosmochemistry; cosmogenic elements; dates; electron probe data; geochemistry; isotopes; kinetics; lunar samples; magnetization; mathematical methods; models; Moon; noble gases; paleomagnetism; paleotemperature; radioactive isotopes; remanent magnetization; rocks; satellites; stable isotopes; thermal history DO - http://dx.doi.org/10.1016/j.gca.2015.01.037 ER - TY - CPAPER T1 - Hybrid Geo-Energy Systems for Energy Storage and Dispatchable Renewable and Low-Carbon Electricity T2 - 2015 European Geosciences Union General Assembly AN - 1684399024; 6345173 JF - 2015 European Geosciences Union General Assembly AU - Buscheck, Thomas AU - Bielicki, Jeffrey AU - Ogland-Hand, Jonathan AU - Hao, Yue AU - Sun, Yunwei AU - Randolph, Jimmy AU - Saar, Martin Y1 - 2015/04/12/ PY - 2015 DA - 2015 Apr 12 KW - Storage KW - Hybrids KW - Energy KW - Energy storage KW - Electricity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1684399024?accountid=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+European+Geosciences+Union+General+Assembly&rft.atitle=Hybrid+Geo-Energy+Systems+for+Energy+Storage+and+Dispatchable+Renewable+and+Low-Carbon+Electricity&rft.au=Buscheck%2C+Thomas%3BBielicki%2C+Jeffrey%3BOgland-Hand%2C+Jonathan%3BHao%2C+Yue%3BSun%2C+Yunwei%3BRandolph%2C+Jimmy%3BSaar%2C+Martin&rft.aulast=Buscheck&rft.aufirst=Thomas&rft.date=2015-04-12&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2015+European+Geosciences+Union+General+Assembly&rft.issn=&rft_id=info:doi/ L2 - http://meetingorganizer.copernicus.org/egu2015/meetingprogramme LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-05-29 N1 - Last updated - 2015-06-01 ER - TY - JOUR T1 - Rates of mineral dissolution under CO (sub 2) storage conditions AN - 1676589943; 2015-039914 AB - Evaluating the potential of a sedimentary basin reservoir to securely store CO (sub 2) benefits from a comprehensive understanding of the geochemical reactions that take place once CO (sub 2) is injected into a formation. In particular, models that predict the transport and reaction of CO (sub 2) within a reservoir require a definition of the types of reactions affected by enhanced levels of CO (sub 2) and how the kinetics of these reactions will affect a heterogeneous mineralogy and formation waters within a reservoir over time. In this review we evaluate rate models used to describe mineral dissolution kinetics and compare the range in values reported for the kinetic parameters used to describe the reactivity of various minerals relevant to mainly siliciclastic reservoirs. Parameters that have a significant impact on model results include the reactive surface area of a mineral, the apparent activation energies used to extrapolate reaction rates to the temperatures of potential storage reservoirs (c. 50-125 degrees C) and the in-situ pH of formation waters with elevated concentrations of dissolved CO (sub 2) . The variation in reported values for these parameters can lead to predicted rates that span many orders of magnitude for a given mineral. Despite these uncertainties recent success with geochemical models has been made by applying a Monte Carlo approach to optimise the kinetic parameters for minerals where robust thermodynamic and kinetic data do not exist. Abstract Copyright (2015) Elsevier, B.V. JF - Chemical Geology AU - Black, Jay R AU - Carroll, Susan A AU - Haese, Ralf R Y1 - 2015/04/02/ PY - 2015 DA - 2015 Apr 02 SP - 134 EP - 144 PB - Elsevier, Amsterdam VL - 399 SN - 0009-2541, 0009-2541 KW - silicates KW - sedimentary basins KW - gas storage KW - solution KW - temperature KW - carbon dioxide KW - activation energy KW - sedimentary rocks KW - chemical reactions KW - basins KW - mineral assemblages KW - kinetics KW - uncertainty KW - pH KW - carbon sequestration KW - Monte Carlo analysis KW - statistical analysis KW - prediction KW - solubility KW - clay minerals KW - models KW - gas injection KW - mathematical methods KW - sheet silicates KW - crystal chemistry 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/1676589943?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Rates+of+mineral+dissolution+under+CO+%28sub+2%29+storage+conditions&rft.au=Black%2C+Jay+R%3BCarroll%2C+Susan+A%3BHaese%2C+Ralf+R&rft.aulast=Black&rft.aufirst=Jay&rft.date=2015-04-02&rft.volume=399&rft.issue=&rft.spage=134&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2014.09.020 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 - 133 N1 - Document feature - illus. N1 - Last updated - 2015-04-30 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - activation energy; basins; carbon dioxide; carbon sequestration; chemical reactions; clay minerals; crystal chemistry; gas injection; gas storage; kinetics; mathematical methods; mineral assemblages; models; Monte Carlo analysis; pH; prediction; sedimentary basins; sedimentary rocks; sheet silicates; silicates; solubility; solution; statistical analysis; temperature; uncertainty DO - http://dx.doi.org/10.1016/j.chemgeo.2014.09.020 ER - TY - JOUR T1 - Improved detection and location of microseismicity during the 2005 Habanero EGS stimulation in the Cooper Basin of South Australia AN - 1812218388; 2016-068493 JF - Seismological Research Letters AU - Templeton, D C AU - Johannesson, G AU - Pyle, M AU - Matzel, E AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 724 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - Cooper Basin KW - Australasia KW - seismicity KW - signal-to-noise ratio KW - Australia KW - South Australia KW - microearthquakes KW - induced earthquakes KW - earthquakes KW - arrays KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812218388?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Improved+detection+and+location+of+microseismicity+during+the+2005+Habanero+EGS+stimulation+in+the+Cooper+Basin+of+South+Australia&rft.au=Templeton%2C+D+C%3BJohannesson%2C+G%3BPyle%2C+M%3BMatzel%2C+E%3BAnonymous&rft.aulast=Templeton&rft.aufirst=D&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=724&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; Australasia; Australia; Cooper Basin; earthquakes; induced earthquakes; microearthquakes; seismicity; signal-to-noise ratio; South Australia ER - TY - JOUR T1 - Paleoseismic speed dating; pushing the limits on dating earthquakes and re-thinking inputs used in OxCal age models AN - 1812211002; 2016-068124 JF - Seismological Research Letters AU - Streig, A R AU - Weldon, Ray AU - Dawson, Timothy E AU - Gavin, D AU - Guilderson, T AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 649 EP - 650 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - technology KW - paleoseismicity KW - Quaternary KW - geologic hazards KW - isotopes KW - Holocene KW - models KW - Cenozoic KW - California KW - radioactive isotopes KW - San Francisco Bay region KW - carbon KW - seismic risk KW - natural hazards KW - risk assessment KW - C-14 KW - earthquakes KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812211002?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Paleoseismic+speed+dating%3B+pushing+the+limits+on+dating+earthquakes+and+re-thinking+inputs+used+in+OxCal+age+models&rft.au=Streig%2C+A+R%3BWeldon%2C+Ray%3BDawson%2C+Timothy+E%3BGavin%2C+D%3BGuilderson%2C+T%3BAnonymous&rft.aulast=Streig&rft.aufirst=A&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=649&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 - C-14; California; carbon; Cenozoic; earthquakes; geologic hazards; Holocene; isotopes; models; natural hazards; paleoseismicity; Quaternary; radioactive isotopes; risk assessment; San Francisco Bay region; seismic risk; technology; United States ER - TY - JOUR T1 - The importance of incorporating a variable Q model in the ground motion prediction equations AN - 1812210547; 2016-068137 JF - Seismological Research Letters AU - Pasyanos, M E AU - Pitarka, A AU - Baltay, A S AU - Abrahamson, N A AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 652 EP - 653 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - geologic hazards KW - seismic response KW - models KW - California KW - Napa earthquake 2014 KW - Q KW - seismicity KW - earthquake prediction KW - seismic risk KW - natural hazards KW - ground motion KW - anelasticity KW - risk assessment KW - algorithms KW - earthquakes KW - 19:Seismology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812210547?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+importance+of+incorporating+a+variable+Q+model+in+the+ground+motion+prediction+equations&rft.au=Pasyanos%2C+M+E%3BPitarka%2C+A%3BBaltay%2C+A+S%3BAbrahamson%2C+N+A%3BAnonymous&rft.aulast=Pasyanos&rft.aufirst=M&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 - 2016-09-16 N1 - SubjectsTermNotLitGenreText - algorithms; anelasticity; California; earthquake prediction; earthquakes; geologic hazards; ground motion; models; Napa earthquake 2014; natural hazards; Q; risk assessment; seismic response; seismic risk; seismicity; United States ER - TY - JOUR T1 - Regional attenuation of southern Nevada using multiphase inversion AN - 1807509580; 2016-066461 JF - Seismological Research Letters AU - Pyle, M AU - Walter, W R AU - Pasyanos, M E 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 - United States KW - discriminant analysis KW - explosions KW - chemical explosions KW - statistical analysis KW - elastic waves KW - Rock Valley KW - attenuation KW - southern Nevada KW - seismicity KW - nuclear explosions KW - Nevada KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509580?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Regional+attenuation+of+southern+Nevada+using+multiphase+inversion&rft.au=Pyle%2C+M%3BWalter%2C+W+R%3BPasyanos%2C+M+E%3BAnonymous&rft.aulast=Pyle&rft.aufirst=M&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 - amplitude; attenuation; chemical explosions; discriminant analysis; elastic waves; explosions; Nevada; nuclear explosions; Rock Valley; seismicity; southern Nevada; statistical analysis; United States ER - TY - JOUR T1 - Southern California earthquake scaling from stable event ratio levels AN - 1807509577; 2016-066397 JF - Seismological Research Letters AU - Mayeda, K AU - Walter, W R AU - Yoo, S AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 600 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - stress drops KW - guided waves KW - seismic moment KW - coda waves KW - elastic waves KW - frequency KW - California KW - surface waves KW - Southern California KW - seismicity KW - seismic waves KW - seismic networks KW - earthquakes KW - uncertainty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509577?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Southern+California+earthquake+scaling+from+stable+event+ratio+levels&rft.au=Mayeda%2C+K%3BWalter%2C+W+R%3BYoo%2C+S%3BAnonymous&rft.aulast=Mayeda&rft.aufirst=K&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=600&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 - California; coda waves; earthquakes; elastic waves; frequency; guided waves; seismic moment; seismic networks; seismic waves; seismicity; Southern California; stress drops; surface waves; uncertainty; United States ER - TY - JOUR T1 - Ground-motion simulations of 3-D basin effects for aftershocks from the 2014 South Napa earthquake AN - 1807509452; 2016-066382 JF - Seismological Research Letters AU - Aagaard, B T AU - Rodgers, A J AU - Pitarka, A AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 597 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - California KW - aftershocks KW - San Francisco Bay region KW - three-dimensional models KW - seismicity KW - magnitude KW - ground motion KW - South Napa earthquake 2014 KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509452?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Ground-motion+simulations+of+3-D+basin+effects+for+aftershocks+from+the+2014+South+Napa+earthquake&rft.au=Aagaard%2C+B+T%3BRodgers%2C+A+J%3BPitarka%2C+A%3BAnonymous&rft.aulast=Aagaard&rft.aufirst=B&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=597&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 - aftershocks; California; earthquakes; ground motion; magnitude; San Francisco Bay region; seismicity; South Napa earthquake 2014; three-dimensional models; United States ER - TY - JOUR T1 - Ground motion simulation in Azerbaijan AN - 1807509163; 2016-066442 JF - Seismological Research Letters AU - Gok, R AU - Pitarka, A AU - Kazimova, S AU - Yetirmishli, G G AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 610 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - technology KW - Commonwealth of Independent States KW - seismicity KW - magnitude KW - ground motion KW - Europe KW - simulation KW - earthquakes KW - Azerbaijan KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509163?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Ground+motion+simulation+in+Azerbaijan&rft.au=Gok%2C+R%3BPitarka%2C+A%3BKazimova%2C+S%3BYetirmishli%2C+G+G%3BAnonymous&rft.aulast=Gok&rft.aufirst=R&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=610&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 - Azerbaijan; Commonwealth of Independent States; earthquakes; Europe; ground motion; magnitude; seismicity; simulation; technology ER - TY - JOUR T1 - Numerical investigation of the impact of the geological and geomechanical properties on the seismo-acoustic responses of underground explosions AN - 1807509090; 2016-066426 JF - Seismological Research Letters AU - Ezzedine, S M AU - Vorobiev, V Y AU - Rodgers, A J AU - Pitarka, A AU - Glenn, L A AU - Antoun, T H 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 - numerical models KW - underground space KW - explosions KW - mechanical properties KW - elastic waves KW - simulation KW - seismic response KW - rock mechanics KW - seismicity KW - sensitivity analysis KW - seismic waves KW - acoustical waves KW - 30:Engineering geology KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509090?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Numerical+investigation+of+the+impact+of+the+geological+and+geomechanical+properties+on+the+seismo-acoustic+responses+of+underground+explosions&rft.au=Ezzedine%2C+S+M%3BVorobiev%2C+V+Y%3BRodgers%2C+A+J%3BPitarka%2C+A%3BGlenn%2C+L+A%3BAntoun%2C+T+H%3BAnonymous&rft.aulast=Ezzedine&rft.aufirst=S&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 - acoustical waves; elastic waves; explosions; mechanical properties; numerical models; rock mechanics; seismic response; seismic waves; seismicity; sensitivity analysis; simulation; underground space ER - TY - JOUR T1 - Comparisons of kinematic rupture models generated with an aspereity modeling technique and GP2014 method AN - 1807509081; 2016-066485 JF - Seismological Research Letters AU - Pitarka, A AU - Graves, R AU - Somerville, Paul AU - Irikura, K AU - Miyake, H AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 619 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - technology KW - Far East KW - three-dimensional models KW - asperities KW - slip rates KW - Green function KW - models KW - California KW - kinematics KW - rupture KW - Southern California KW - seismicity KW - Asia KW - earthquakes KW - Japan KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509081?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Comparisons+of+kinematic+rupture+models+generated+with+an+aspereity+modeling+technique+and+GP2014+method&rft.au=Pitarka%2C+A%3BGraves%2C+R%3BSomerville%2C+Paul%3BIrikura%2C+K%3BMiyake%2C+H%3BAnonymous&rft.aulast=Pitarka&rft.aufirst=A&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=619&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; asperities; California; earthquakes; Far East; Green function; Japan; kinematics; models; rupture; seismicity; slip rates; Southern California; technology; three-dimensional models; United States ER - TY - JOUR T1 - Synthesis of geologic and historical seismic data from nuclear and chemical explosions to characterize the source physics experiment dry alluvium geology site AN - 1807508802; 2016-066452 JF - Seismological Research Letters AU - Rodgers, A J AU - Wagoner, J AU - Pitarka, A AU - Helmberger, Donald V AU - Harben, P 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 - experimental studies KW - three-dimensional models KW - explosions KW - chemical explosions KW - Nevada Test Site KW - boreholes KW - seismicity KW - ground motion KW - Yucca Flat KW - nuclear explosions KW - earthquakes KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508802?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Synthesis+of+geologic+and+historical+seismic+data+from+nuclear+and+chemical+explosions+to+characterize+the+source+physics+experiment+dry+alluvium+geology+site&rft.au=Rodgers%2C+A+J%3BWagoner%2C+J%3BPitarka%2C+A%3BHelmberger%2C+Donald+V%3BHarben%2C+P%3BProthro%2C+L+B%3BAnonymous&rft.aulast=Rodgers&rft.aufirst=A&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 - boreholes; chemical explosions; earthquakes; experimental studies; explosions; ground motion; Nevada; Nevada Test Site; nuclear explosions; seismicity; three-dimensional models; United States; 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 - Investigating geothermal systems using virtual seismometers AN - 1807508732; 2016-066593 JF - Seismological Research Letters AU - Matzel, E AU - Morency, C AU - Templeton, D AU - Pyle, M AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 641 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - technology KW - monitoring KW - Green function KW - seismographs KW - interferometry KW - geothermal energy KW - geothermal fields KW - geothermal systems KW - seismicity KW - microearthquakes KW - earthquakes KW - instruments KW - 19:Seismology KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508732?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Investigating+geothermal+systems+using+virtual+seismometers&rft.au=Matzel%2C+E%3BMorency%2C+C%3BTempleton%2C+D%3BPyle%2C+M%3BAnonymous&rft.aulast=Matzel&rft.aufirst=E&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=641&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; geothermal energy; geothermal fields; geothermal systems; Green function; instruments; interferometry; microearthquakes; monitoring; seismicity; seismographs; technology ER - TY - JOUR T1 - Effect of geomechanical properties anisotropy on the near-field and the far-field seismic responses due to underground explosions AN - 1807508636; 2016-066423 JF - Seismological Research Letters AU - Vorobiev, O Y AU - Ezzedine, S M AU - Antoun, T H AU - Glenn, L A 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 - soil mechanics KW - Nevada Test Site KW - underground space KW - seismicity KW - explosions KW - effects KW - simulation KW - seismic response KW - Nevada KW - 30:Engineering geology KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508636?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Effect+of+geomechanical+properties+anisotropy+on+the+near-field+and+the+far-field+seismic+responses+due+to+underground+explosions&rft.au=Vorobiev%2C+O+Y%3BEzzedine%2C+S+M%3BAntoun%2C+T+H%3BGlenn%2C+L+A%3BAnonymous&rft.aulast=Vorobiev&rft.aufirst=O&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 - 2016-09-16 N1 - SubjectsTermNotLitGenreText - effects; explosions; Nevada; Nevada Test Site; seismic response; seismicity; simulation; soil mechanics; underground space; United States ER - TY - JOUR T1 - Sensitivity analysis of the far-field motion from the SPE3 underground chemical explosion AN - 1807508548; 2016-066460 JF - Seismological Research Letters AU - Pitarka, A AU - Ezzedine, S M AU - Vorobiev, O Y AU - Antoun, T H AU - Glenn, L A AU - Mellors, R J AU - Walter, W R AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 613 EP - 614 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 - underground cavities KW - seismicity KW - explosions KW - sensitivity analysis KW - chemical explosions KW - ground motion KW - simulation KW - earthquakes KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508548?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sensitivity+analysis+of+the+far-field+motion+from+the+SPE3+underground+chemical+explosion&rft.au=Pitarka%2C+A%3BEzzedine%2C+S+M%3BVorobiev%2C+O+Y%3BAntoun%2C+T+H%3BGlenn%2C+L+A%3BMellors%2C+R+J%3BWalter%2C+W+R%3BAnonymous&rft.aulast=Pitarka&rft.aufirst=A&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 - 2016-09-16 N1 - SubjectsTermNotLitGenreText - chemical explosions; earthquakes; explosions; ground motion; Nevada; Nevada Test Site; seismicity; sensitivity analysis; simulation; underground cavities; United States ER - TY - JOUR T1 - Three-dimensional ground motion simulations of the 2014 South Napa earthquake using the USGS geologic/seismic model and various source models AN - 1807508535; 2016-066381 JF - Seismological Research Letters AU - Rogers, A J AU - Pitarka, A AU - Dreger, D S AU - Aagaard, B T AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 597 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - California KW - three-dimensional models KW - magnitude KW - ground motion KW - South Napa earthquake 2014 KW - tectonics KW - simulation KW - earthquakes KW - seismotectonics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508535?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Three-dimensional+ground+motion+simulations+of+the+2014+South+Napa+earthquake+using+the+USGS+geologic%2Fseismic+model+and+various+source+models&rft.au=Rogers%2C+A+J%3BPitarka%2C+A%3BDreger%2C+D+S%3BAagaard%2C+B+T%3BAnonymous&rft.aulast=Rogers&rft.aufirst=A&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=597&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 - California; earthquakes; ground motion; magnitude; seismotectonics; simulation; South Napa earthquake 2014; tectonics; three-dimensional models; United States ER - TY - JOUR T1 - Kinematic rupture characterization for ground motion simulation of shallow crustal earthquakes AN - 1807508503; 2016-066480 JF - Seismological Research Letters AU - Graves, R W AU - Pitarka, A AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 617 EP - 618 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - kinematics KW - rupture KW - seismicity KW - shallow-focus earthquakes KW - statistical analysis KW - ground motion KW - simulation KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508503?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Kinematic+rupture+characterization+for+ground+motion+simulation+of+shallow+crustal+earthquakes&rft.au=Graves%2C+R+W%3BPitarka%2C+A%3BAnonymous&rft.aulast=Graves&rft.aufirst=R&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=617&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 - earthquakes; ground motion; kinematics; rupture; seismicity; shallow-focus earthquakes; simulation; statistical analysis ER - TY - JOUR T1 - The effects of 3D heterogeneity on regional moment tensor source-type discrimination AN - 1807508435; 2016-066455 JF - Seismological Research Letters AU - Chiang, A AU - Dreger, D S AU - Pitarka, A AU - Ford, Sean R 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 - technology KW - discriminant analysis KW - three-dimensional models KW - explosions KW - statistical analysis KW - Green function KW - seismic sources KW - moment tensors KW - seismicity KW - ground motion KW - heterogeneity KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508435?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+effects+of+3D+heterogeneity+on+regional+moment+tensor+source-type+discrimination&rft.au=Chiang%2C+A%3BDreger%2C+D+S%3BPitarka%2C+A%3BFord%2C+Sean+R%3BAnonymous&rft.aulast=Chiang&rft.aufirst=A&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 - discriminant analysis; earthquakes; explosions; Green function; ground motion; heterogeneity; moment tensors; seismic sources; seismicity; statistical analysis; technology; three-dimensional models ER - TY - JOUR T1 - Locating the origin of scattered waves by simulating time reversal of the seismic wavefield AN - 1807508213; 2016-066456 JF - Seismological Research Letters AU - Myers, S C AU - Pitarka, A AU - Simmons, Nathan A AU - Sjogreen, B AU - Johannesson, G 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 - United States KW - seismograms KW - body waves KW - technology KW - explosions KW - chemical explosions KW - elastic waves KW - seismic sources KW - simulation KW - models KW - Nevada Test Site KW - seismicity KW - propagation KW - seismic waves KW - wave dispersion KW - S-waves KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508213?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Locating+the+origin+of+scattered+waves+by+simulating+time+reversal+of+the+seismic+wavefield&rft.au=Myers%2C+S+C%3BPitarka%2C+A%3BSimmons%2C+Nathan+A%3BSjogreen%2C+B%3BJohannesson%2C+G%3BAnonymous&rft.aulast=Myers&rft.aufirst=S&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 - 2016-09-16 N1 - SubjectsTermNotLitGenreText - body waves; chemical explosions; elastic waves; explosions; models; Nevada; Nevada Test Site; propagation; S-waves; seismic sources; seismic waves; seismicity; seismograms; simulation; technology; United States; wave dispersion ER - TY - JOUR T1 - Installation of high-frequency array and broadband seismic stations in south central Iraq AN - 1807508160; 2016-066530 JF - Seismological Research Letters AU - Al-Shukri, H AU - Mahdi, H AU - Chlaib, H AU - Ramthan, A AU - Gok, R AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 628 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - technology KW - monitoring KW - information management KW - teleseismic signals KW - Iraq KW - data management KW - Basra Iraq KW - seismicity KW - seismic networks KW - Asia KW - Middle East KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508160?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Installation+of+high-frequency+array+and+broadband+seismic+stations+in+south+central+Iraq&rft.au=Al-Shukri%2C+H%3BMahdi%2C+H%3BChlaib%2C+H%3BRamthan%2C+A%3BGok%2C+R%3BAnonymous&rft.aulast=Al-Shukri&rft.aufirst=H&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=628&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; Basra Iraq; data management; information management; instruments; Iraq; Middle East; monitoring; seismic networks; seismicity; technology; teleseismic signals ER - TY - JOUR T1 - Exploring correlation methods of identifying explosions AN - 1807505967; 2016-066431 JF - Seismological Research Letters AU - Walter, W R AU - Ford, Sean R AU - Dodge, Doug A AU - Pyle, M AU - Hauk, T F 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 - United States KW - monitoring KW - seismicity KW - explosions KW - correlation KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807505967?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Exploring+correlation+methods+of+identifying+explosions&rft.au=Walter%2C+W+R%3BFord%2C+Sean+R%3BDodge%2C+Doug+A%3BPyle%2C+M%3BHauk%2C+T+F%3BAnonymous&rft.aulast=Walter&rft.aufirst=W&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 - correlation; explosions; monitoring; Nevada; seismicity; United States ER - TY - JOUR T1 - Preliminary results of crustal structure beneath Nasiriyah and Basra areas, southern Iraq, using inversion of fundamental mode Rayleigh wave dispersion curves AN - 1807505962; 2016-066441 JF - Seismological Research Letters AU - Mahdi, H AU - Abdulnaby, W AU - Al-Shukri, H AU - Chlaib, H AU - Ramthan, A AU - Hannina, S AU - Mahdi, M AU - Al-Mohaned, R AU - Al-Zubairi, Z AU - Gok, R AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 609 EP - 610 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - Nasiriyah Iraq KW - guided waves KW - magnitude KW - elastic waves KW - Rayleigh waves KW - Mohorovicic discontinuity KW - Iraq KW - depth KW - southern Iraq KW - Basra Iraq KW - surface waves KW - seismicity KW - velocity structure KW - ground motion KW - seismic waves KW - wave dispersion KW - Asia KW - earthquakes KW - Middle East KW - crust KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807505962?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Preliminary+results+of+crustal+structure+beneath+Nasiriyah+and+Basra+areas%2C+southern+Iraq%2C+using+inversion+of+fundamental+mode+Rayleigh+wave+dispersion+curves&rft.au=Mahdi%2C+H%3BAbdulnaby%2C+W%3BAl-Shukri%2C+H%3BChlaib%2C+H%3BRamthan%2C+A%3BHannina%2C+S%3BMahdi%2C+M%3BAl-Mohaned%2C+R%3BAl-Zubairi%2C+Z%3BGok%2C+R%3BAnonymous&rft.aulast=Mahdi&rft.aufirst=H&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=609&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; Basra Iraq; crust; depth; earthquakes; elastic waves; ground motion; guided waves; Iraq; magnitude; Middle East; Mohorovicic discontinuity; Nasiriyah Iraq; Rayleigh waves; seismic waves; seismicity; southern Iraq; surface waves; velocity structure; wave dispersion ER - TY - JOUR T1 - Impacts of ocean albedo alteration on Arctic sea ice restoration and Northern Hemisphere climate AN - 1787968842; PQ0002929912 AB - The Arctic Ocean is expected to transition into a seasonally ice-free state by mid-century, enhancing Arctic warming and leading to substantial ecological and socio-economic challenges across the Arctic region. It has been proposed that artificially increasing high latitude ocean albedo could restore sea ice, but the climate impacts of such a strategy have not been previously explored. Motivated by this, we investigate the impacts of idealized high latitude ocean albedo changes on Arctic sea ice restoration and climate. In our simulated 4xCO sub(2) climate, imposing surface albedo alterations over the Arctic Ocean leads to partial sea ice recovery and a modest reduction in Arctic warming. With the most extreme ocean albedo changes, imposed over the area 70[degrees]-90[degrees]N, September sea ice cover stabilizes at ~40% of its preindustrial value (compared to ~3% without imposed albedo modifications). This is accompanied by an annual mean Arctic surface temperature decrease of ~2 [degrees]C but no substantial global mean temperature decrease. Imposed albedo changes and sea ice recovery alter climate outside the Arctic region too, affecting precipitation distribution over parts of the continental United States and Northeastern Pacific. For example, following sea ice recovery, wetter and milder winter conditions are present in the Southwest United States while the East Coast experiences cooling. We conclude that although ocean albedo alteration could lead to some sea ice recovery, it does not appear to be an effective way of offsetting the overall effects of CO sub(2) induced global warming. JF - Environmental Research Letters AU - Cvijanovic, Ivana AU - Caldeira, Ken AU - Macmartin, Douglas G AD - Carnegie Institution for Science, Department of Global Ecology, 260 Panama St., Stanford, CA 94305, USA, ivanacv@llnl.gov Y1 - 2015/04// PY - 2015 DA - April 2015 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 10 IS - 4 SN - 1748-9326, 1748-9326 KW - Environment Abstracts KW - PN, Arctic Ocean KW - Albedo KW - Climate KW - Climate change KW - Environmental impact KW - Temperature KW - Socioeconomics KW - Greenhouse effect KW - Polar environments KW - Winter KW - USA KW - Sea ice KW - Oceans KW - Global warming KW - Latitude KW - Carbon dioxide KW - ENA 12:Oceans & Estuaries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1787968842?accountid=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=Impacts+of+ocean+albedo+alteration+on+Arctic+sea+ice+restoration+and+Northern+Hemisphere+climate&rft.au=Cvijanovic%2C+Ivana%3BCaldeira%2C+Ken%3BMacmartin%2C+Douglas+G&rft.aulast=Cvijanovic&rft.aufirst=Ivana&rft.date=2015-04-01&rft.volume=10&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=17489326&rft_id=info:doi/10.1088%2F1748-9326%2F10%2F4%2F044020 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Albedo; Climate change; Climate; Temperature; Environmental impact; Socioeconomics; Greenhouse effect; Polar environments; Winter; Sea ice; Oceans; Latitude; Global warming; Carbon dioxide; PN, Arctic Ocean; USA DO - http://dx.doi.org/10.1088/1748-9326/10/4/044020 ER - TY - JOUR T1 - The influence of ice marginal setting on early Holocene retreat rates in central West Greenland AN - 1769967792; 2016-018445 AB - Ice sheet reconstructions from diverse ice margin settings, spanning multiple millennia, are needed to assess the reaction of the Greenland Ice Sheet (GrIS) to millennial-scale climatic forcing and to place historical records in a longer-term context. Here we present 18 new cosmogenic (super 10) Be exposure ages and five new radiocarbon ages that constrain the early Holocene retreat of the GrIS in the Disko Bugt region in both a marine and a land-based setting. Results indicate similar rates of early Holocene retreat of approximately 40-50 m a (super -1) from transects in Torsukattak fjord (marine setting) and the Naternaq area (land-based setting). We compile seven previously published chronologies of deglaciation from West Greenland, which yield early Holocene retreat rates ranging from 10 to 65 m a (super -1) , similar to those determined for our two study areas. This work demonstrates that when averaged on millennial timescales, retreat rates were remarkably similar along the western GrIS margin. Furthermore, the retreat rates calculated here demonstrate that terrestrial sectors of ice sheets can retreat at net rates comparable to their marine counterparts. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - JQS. Journal of Quaternary Science AU - Kelley, Samuel E AU - Briner, Jason P AU - Zimmerman, Susan R H Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 271 EP - 280 PB - John Wiley and Sons for the Quaternary Research Association, Chichester VL - 30 IS - 3 SN - 0267-8179, 0267-8179 KW - lower Holocene KW - isotopes KW - Greenland ice sheet KW - West Greenland KW - Torsukattak Fjord KW - Naternaq KW - Holocene KW - deglaciation KW - Cenozoic KW - Greenland KW - radioactive isotopes KW - Disko Bugt KW - carbon KW - glacial environment KW - absolute age KW - alkaline earth metals KW - Quaternary KW - Be-10 KW - Arctic region KW - rates KW - ice sheets KW - paleoenvironment KW - metals KW - glacial geology KW - C-14 KW - beryllium KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769967792?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=JQS.+Journal+of+Quaternary+Science&rft.atitle=The+influence+of+ice+marginal+setting+on+early+Holocene+retreat+rates+in+central+West+Greenland&rft.au=Kelley%2C+Samuel+E%3BBriner%2C+Jason+P%3BZimmerman%2C+Susan+R+H&rft.aulast=Kelley&rft.aufirst=Samuel&rft.date=2015-04-01&rft.volume=30&rft.issue=3&rft.spage=271&rft.isbn=&rft.btitle=&rft.title=JQS.+Journal+of+Quaternary+Science&rft.issn=02678179&rft_id=info:doi/10.1002%2Fjqs.2778 L2 - http://www3.interscience.wiley.com/cgi-bin/jhome/2507 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 - 66 N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - Last updated - 2016-03-03 N1 - SubjectsTermNotLitGenreText - absolute age; alkaline earth metals; Arctic region; Be-10; beryllium; C-14; carbon; Cenozoic; deglaciation; Disko Bugt; glacial environment; glacial geology; Greenland; Greenland ice sheet; Holocene; ice sheets; isotopes; lower Holocene; metals; Naternaq; paleoenvironment; Quaternary; radioactive isotopes; rates; Torsukattak Fjord; West Greenland DO - http://dx.doi.org/10.1002/jqs.2778 ER - TY - JOUR T1 - How well do CMIP5 climate simulations replicate historical trends and patterns of meteorological droughts? AN - 1729844108; 2015-102227 AB - Assessing the uncertainties and understanding the deficiencies of climate models are fundamental to developing adaptation strategies. The objective of this study is to understand how well Coupled Model Intercomparison-Phase 5 (CMIP5) climate model simulations replicate ground-based observations of continental drought areas and their trends. The CMIP5 multimodel ensemble encompasses the Climatic Research Unit (CRU) ground-based observations of area under drought at all time steps. However, most model members overestimate the areas under extreme drought, particularly in the Southern Hemisphere (SH). Furthermore, the results show that the time series of observations and CMIP5 simulations of areas under drought exhibit more variability in the SH than in the Northern Hemisphere (NH). The trend analysis of areas under drought reveals that the observational data exhibit a significant positive trend at the significance level of 0.05 over all land areas. The observed trend is reproduced by about three-fourths of the CMIP5 models when considering total land areas in drought. While models are generally consistent with observations at a global (or hemispheric) scale, most models do not agree with observed regional drying and wetting trends. Over many regions, at most 40% of the CMIP5 models are in agreement with the trends of CRU observations. The drying/wetting trends calculated using the 3 months Standardized Precipitation Index (SPI) values show better agreement with the corresponding CRU values than with the observed annual mean precipitation rates. Pixel-scale evaluation of CMIP5 models indicates that no single model demonstrates an overall superior performance relative to the other models. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Nasrollahi, Nasrin AU - AghaKouchak, Amir AU - Cheng, Linyin AU - Damberg, Lisa AU - Phillips, Thomas J AU - Miao, Chiyuan AU - Hsu, Kuolin AU - Sorooshian, Soroosh Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 2847 EP - 2864 PB - American Geophysical Union, Washington, DC VL - 51 IS - 4 SN - 0043-1397, 0043-1397 KW - hydrology KW - numerical models KW - global KW - data processing KW - atmospheric precipitation KW - equations KW - drought KW - Southern Hemisphere KW - quantitative analysis KW - digital simulation KW - meteorology KW - uncertainty KW - climate KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729844108?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=How+well+do+CMIP5+climate+simulations+replicate+historical+trends+and+patterns+of+meteorological+droughts%3F&rft.au=Nasrollahi%2C+Nasrin%3BAghaKouchak%2C+Amir%3BCheng%2C+Linyin%3BDamberg%2C+Lisa%3BPhillips%2C+Thomas+J%3BMiao%2C+Chiyuan%3BHsu%2C+Kuolin%3BSorooshian%2C+Soroosh&rft.aulast=Nasrollahi&rft.aufirst=Nasrin&rft.date=2015-04-01&rft.volume=51&rft.issue=4&rft.spage=2847&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2014WR016318 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 - 65 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-11-05 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - atmospheric precipitation; climate; data processing; digital simulation; drought; equations; global; hydrology; meteorology; numerical models; quantitative analysis; Southern Hemisphere; uncertainty DO - http://dx.doi.org/10.1002/2014WR016318 ER - TY - JOUR T1 - A review of lunar chronology revealing a preponderance of 4.34-4.37 Ga ages AN - 1700098724; 2015-073224 AB - Data obtained from Sm-Nd and Rb-Sr isotopic measurements of lunar highlands' samples are renormalized to common standard values and then used to define ages with a common isochron regression algorithm. The reliability of these ages is evaluated using five criteria that include whether: (1) the ages are defined by multiple isotopic systems, (2) the data demonstrate limited scatter outside uncertainty, (3) initial isotopic compositions are consistent with the petrogenesis of the samples, (4) the ages are defined by an isotopic system that is resistant to disturbance by impact metamorphism, and (5) the rare-earth element abundances determined by isotope dilution of bulk of mineral fractions match those measured by in situ analyses. From this analysis, it is apparent that the oldest highlands' rock ages are some of the least reliable, and that there is little support for crustal ages older than approximately 4.40 Ga. A model age for ur-KREEP formation calculated using the most reliable Mg-suite Sm-Nd isotopic systematics, in conjunction with Sm-Nd analyses of KREEP basalts, is 4389 + or - 45 Ma. This age is a good match to the Lu-Hf model age of 4353 + or - 37 Ma determined using a subset of this sample suite, the average model age of 4353 + or - 25 Ma determined on mare basalts with the (super 146) Sm- (super 142) Nd isotopic system, with a peak in Pb-Pb ages observed in lunar zircons of approximately 4340 + or - 20 Ma, and the oldest terrestrial zircon age of 4374 + or - 6 Ma. The preponderance of ages between 4.34 and 4.37 Ga reflect either primordial solidification of a lunar magma ocean or a widespread secondary magmatic event on the lunar nearside. The first scenario is not consistent with the oldest ages reported for lunar zircons, whereas the second scenario does not account for concordance between ages of crustal rocks and mantle reservoirs. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Borg, Lars E AU - Gaffney, Amy M AU - Shearer, Charles K Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 715 EP - 732 PB - Meteoritical Society, Fayetteville, AR VL - 50 IS - 4 SN - 1086-9379, 1086-9379 KW - silicates KW - magnesium KW - volcanic rocks KW - igneous rocks KW - late heavy bombardment KW - lunar highlands KW - iron KW - Rb/Sr KW - Lu/Hf KW - plutonic rocks KW - chronology KW - dates KW - basalts KW - orthosilicates KW - absolute age KW - rare earths KW - uncertainty KW - zircon group KW - Pb/Pb KW - alkaline earth metals KW - magma oceans KW - Moon KW - differentiation KW - zircon KW - isochrons KW - impacts KW - metamorphism KW - anorthosite KW - nesosilicates KW - models KW - KREEP KW - Sm/Nd KW - metals KW - lunar crust KW - crystallization KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700098724?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+review+of+lunar+chronology+revealing+a+preponderance+of+4.34-4.37+Ga+ages&rft.au=Borg%2C+Lars+E%3BGaffney%2C+Amy+M%3BShearer%2C+Charles+K&rft.aulast=Borg&rft.aufirst=Lars&rft.date=2015-04-01&rft.volume=50&rft.issue=4&rft.spage=715&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12373 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 - 101 N1 - PubXState - AR N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-07-30 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - absolute age; alkaline earth metals; anorthosite; basalts; chronology; crystallization; dates; differentiation; igneous rocks; impacts; iron; isochrons; KREEP; late heavy bombardment; Lu/Hf; lunar crust; lunar highlands; magma oceans; magnesium; metals; metamorphism; models; Moon; nesosilicates; orthosilicates; Pb/Pb; plutonic rocks; rare earths; Rb/Sr; silicates; Sm/Nd; uncertainty; volcanic rocks; zircon; zircon group DO - http://dx.doi.org/10.1111/maps.12373 ER - TY - JOUR T1 - Kinematic finite-source model for the 24 August 2014 South Napa, California, earthquake from joint inversion of seismic, GPS, and InSAR data AN - 1689593339; 2015-058322 JF - Seismological Research Letters AU - Dreger, Douglas S AU - Huang, Mong-Han AU - Rodgers, Arthur AU - Taira, Taka'aki AU - Wooddell, Kathryn Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 327 EP - 334 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2A SN - 0895-0695, 0895-0695 KW - United States KW - Global Positioning System KW - three-dimensional models KW - seismic moment KW - magnitude KW - radar methods KW - South Napa earthquake 2014 KW - slip rates KW - simulation KW - models KW - California KW - kinematics KW - seismicity KW - SAR KW - main shocks KW - ground motion KW - focus KW - InSAR KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689593339?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Kinematic+finite-source+model+for+the+24+August+2014+South+Napa%2C+California%2C+earthquake+from+joint+inversion+of+seismic%2C+GPS%2C+and+InSAR+data&rft.au=Dreger%2C+Douglas+S%3BHuang%2C+Mong-Han%3BRodgers%2C+Arthur%3BTaira%2C+Taka%27aki%3BWooddell%2C+Kathryn&rft.aulast=Dreger&rft.aufirst=Douglas&rft.date=2015-04-01&rft.volume=86&rft.issue=2A&rft.spage=327&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220140244 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 - 20 N1 - PubXState - CA N1 - Document feature - illus. incl. 2 tables, geol. sketch maps N1 - Last updated - 2016-10-25 N1 - CODEN - EAQNAT N1 - SubjectsTermNotLitGenreText - California; earthquakes; focus; Global Positioning System; ground motion; InSAR; kinematics; magnitude; main shocks; models; radar methods; SAR; seismic moment; seismicity; simulation; slip rates; South Napa earthquake 2014; three-dimensional models; United States DO - http://dx.doi.org/10.1785/0220140244 ER - TY - JOUR T1 - Accurate local event locations in Rock Valley, Nevada, using a Bayesian multiple-event method AN - 1689592612; 2015-058241 AB - The Source Physics Experiment (SPE) is a series of chemical explosions at the Nevada National Security Site (NNSS, formerly the Nevada Test Site) designed to improve our understanding of explosion physics. A future SPE will place an explosion at the hypocenter of a small, shallow earthquake, providing a direct earthquake-to-explosion experiment. Candidate earthquakes for this novel experiment come from a sequence of over 200 unusually shallow events that occurred in Rock Valley, Nevada, in the southeastern portion of the NNSS during 1993. We apply the Bayesloc multiple-event location algorithm (Myers et al., 2007, 2009) to determine the best possible locations and depths for these events. Past nuclear tests in the nearby Yucca Flat on the NNSS are relocated with the same method to provide insight into the accuracy and uncertainties associated with the Bayesloc location results for the Rock Valley earthquakes. This test suggests that we can accurately pinpoint the location of the Rock Valley events within approximately 1 km of their true locations using direct arrival times only. The incorporation of differential arrival times and a potential ground-truth event can significantly decrease the already small uncertainties associated with the epicenter locations. Depth determinations have uncertainties of a few kilometers. Depth uncertainty may be reduced by developing an accurate 3D model of P-wave and S-wave velocity for Rock Valley. JF - Bulletin of the Seismological Society of America AU - Pyle, Moira L AU - Myers, Stephen C AU - Walter, William R AU - Smith, Kenneth D Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 706 EP - 718 PB - Seismological Society of America, Berkeley, CA VL - 105 IS - 2A SN - 0037-1106, 0037-1106 KW - United States KW - P-waves KW - technology KW - Bayesian analysis KW - chemical explosions KW - elastic waves KW - seismicity KW - velocity KW - focus KW - nuclear explosions KW - arrival time KW - Nevada KW - body waves KW - monitoring KW - three-dimensional models KW - explosions KW - statistical analysis KW - magnitude KW - Rock Valley KW - depth KW - Rock Valley earthquake 1993 KW - main shocks KW - seismic waves KW - earthquakes KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689592612?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Accurate+local+event+locations+in+Rock+Valley%2C+Nevada%2C+using+a+Bayesian+multiple-event+method&rft.au=Pyle%2C+Moira+L%3BMyers%2C+Stephen+C%3BWalter%2C+William+R%3BSmith%2C+Kenneth+D&rft.aulast=Pyle&rft.aufirst=Moira&rft.date=2015-04-01&rft.volume=105&rft.issue=2A&rft.spage=706&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120140251 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 - 20 N1 - PubXState - CA N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2015-06-18 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - arrival time; Bayesian analysis; body waves; chemical explosions; depth; earthquakes; elastic waves; explosions; focus; magnitude; main shocks; monitoring; Nevada; nuclear explosions; P-waves; Rock Valley; Rock Valley earthquake 1993; S-waves; seismic waves; seismicity; statistical analysis; technology; three-dimensional models; United States; velocity DO - http://dx.doi.org/10.1785/0120140251 ER - TY - JOUR T1 - Rapid and early deglaciation in the central Brooks Range, Arctic Alaska AN - 1676589796; 2015-039961 AB - Alpine-style glaciation was rare in the Arctic during the last glaciation because ice sheets occupied most of the glaciated high latitudes. Due to the tight coupling of alpine-glacier fluctuations with climate, the geomorphic evidence of such fluctuations in the Brooks Range, Alaska (USA), presents a unique opportunity to study past climate changes in this portion of the Arctic. We use cosmogenic (super 10) Be exposure dating to directly date Last Glacial Maximum (LGM) terminal moraines and deglaciation in the central Brooks Range. (super 10) Be ages from moraine boulders indicate that the LGM culminated at ca. 21 ka and was followed by substantial retreat upvalley prior to a second moraine-building episode culminating at ca. 17 ka. Subsequent rapid deglaciation occurred between ca. 16 ka and 15 ka, when glaciers receded to within their Neoglacial limits. Initial deglaciation after the LGM was likely caused by ice sheet-induced atmospheric circulation changes and increasing insolation. Brooks Range glaciers largely disappeared during Heinrich Stadial 1, prior to significant warming in the North Atlantic region during the Bolling-Allerod, but coincident with global CO (sub 2) rise. Glacier fluctuations during the late-glacial period, if any, were restricted to within their Neoglacial extents. This new chronology suggests that ice sheet-modulated atmospheric circulation and global CO (sub 2) dominate glacial climate forcings in Arctic Alaska. JF - Geology (Boulder) AU - Pendleton, Simon L AU - Ceperley, Elizabeth G AU - Briner, Jason P AU - Kaufman, Darrell S AU - Zimmerman, Susan Y1 - 2015/03/19/ PY - 2015 DA - 2015 Mar 19 SP - 419 EP - 422 PB - Geological Society of America (GSA), Boulder, CO VL - 43 IS - 5 SN - 0091-7613, 0091-7613 KW - United States KW - relative age KW - glacial extent KW - isotopes KW - exposure age KW - deglaciation KW - Cenozoic KW - radioactive isotopes KW - dates KW - terminal moraines KW - sediments KW - moraines KW - climate forcing KW - alkaline earth metals KW - boulders KW - Quaternary KW - Be-10 KW - clastic sediments KW - Arctic region KW - glaciers KW - end moraines KW - metals KW - upper Quaternary KW - Alaska KW - Brooks Range KW - beryllium KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676589796?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geology+%28Boulder%29&rft.atitle=Rapid+and+early+deglaciation+in+the+central+Brooks+Range%2C+Arctic+Alaska&rft.au=Pendleton%2C+Simon+L%3BCeperley%2C+Elizabeth+G%3BBriner%2C+Jason+P%3BKaufman%2C+Darrell+S%3BZimmerman%2C+Susan&rft.aulast=Pendleton&rft.aufirst=Simon&rft.date=2015-03-19&rft.volume=43&rft.issue=5&rft.spage=419&rft.isbn=&rft.btitle=&rft.title=Geology+%28Boulder%29&rft.issn=00917613&rft_id=info:doi/10.1130%2FG36430.1 L2 - http://geology.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 - 34 N1 - PubXState - CO N1 - Document feature - illus. incl. geol. sketch map N1 - SuppNotes - GSA Data Repository item 2015147 N1 - Last updated - 2015-06-18 N1 - CODEN - GLGYBA N1 - SubjectsTermNotLitGenreText - Alaska; alkaline earth metals; Arctic region; Be-10; beryllium; boulders; Brooks Range; Cenozoic; clastic sediments; climate forcing; dates; deglaciation; end moraines; exposure age; glacial extent; glaciers; isotopes; metals; moraines; Quaternary; radioactive isotopes; relative age; sediments; terminal moraines; United States; upper Quaternary DO - http://dx.doi.org/10.1130/G36430.1 ER - TY - JOUR T1 - Identifying and Exploiting Diurnal Motifs in Wind Generation Time Series Data AN - 1709747399; PQ0001668393 AB - Wind energy is scheduled on the power grid using 0-6 h ahead forecasts generated from computer simulations or historical data. When the forecasts are inaccurate, control room operators use their expertise, as well as the actual generation from previous days, to estimate the amount of energy to schedule. However, this is a challenge, and it would be useful for the operators to have additional information they can exploit to make better informed decisions. In this paper, we use techniques from time series analysis to determine if there are motifs, or frequently occurring diurnal patterns in wind generation data. We compare two different representations of the data and four different ways of identifying the number of motifs. Using data from wind farms in Tehachapi Pass and mid-Columbia Basin, we describe our findings and discuss how these motifs can be used to guide scheduling decisions. JF - International Journal of Pattern Recognition and Artificial Intelligence AU - Fan, Ya Ju AU - Kamath, Chandrika AD - Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA fan4@llnl.gov Y1 - 2015/03// PY - 2015 DA - Mar 2015 SP - 1550012 EP - 1-1550012-25 PB - World Scientific Publishing Co., Inc., 27 Warren Street Hackensack NJ 07601 United States VL - 29 IS - 2 SN - 0218-0014, 0218-0014 KW - Environmental Engineering Abstracts (EN); Computer and Information Systems Abstracts (CI); ANTE: Abstracts in New Technologies and Engineering (AN) KW - Wind generation KW - time series analysis KW - motifs KW - clustering KW - Operators KW - Schedules KW - Estimates KW - Computer simulation KW - Representations KW - Time series analysis KW - Wind power generation KW - Decisions KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709747399?accountid=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=International+Journal+of+Pattern+Recognition+and+Artificial+Intelligence&rft.atitle=Identifying+and+Exploiting+Diurnal+Motifs+in+Wind+Generation+Time+Series+Data&rft.au=Fan%2C+Ya+Ju%3BKamath%2C+Chandrika&rft.aulast=Fan&rft.aufirst=Ya&rft.date=2015-03-01&rft.volume=29&rft.issue=2&rft.spage=1550012&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Pattern+Recognition+and+Artificial+Intelligence&rft.issn=02180014&rft_id=info:doi/10.1142%2FS0218001415500123 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Number of references - 21 N1 - Last updated - 2015-12-07 DO - http://dx.doi.org/10.1142/S0218001415500123 ER - TY - JOUR T1 - Plutonium(IV) sorption to montmorillonite in the presence of organic matter AN - 1689592740; 2015-054446 AB - The effect of altering the order of addition in a ternary system of plutonium(IV), organic matter (fulvic acid, humic acid and desferrioxamine B), and montmorillonite was investigated. A decrease in Pu(IV) sorption to montmorillonite in the presence of fulvic and humic acid relative to the binary Pu-montmorillonite system, is attributed to strong organic aqueous complex formation with aqueous Pu(IV). No dependence on the order of addition was observed. In contrast, in the system where Pu(IV) was equilibrated with desferrioxamine B (DFOB) prior to addition of montmorillonite, an increase in Pu(IV) sorption was observed relative to the binary system. When DFOB was equilibrated with montmorillonite prior to addition of Pu(IV), Pu(IV) sorption was equivalent to the binary system. X-ray diffraction and transmission electron microscopy revealed that DFOB accumulated in the interlayer of montmorillonite. The order of DFOB addition plays an important role in the observed sorption/desorption behavior of Pu. The irreversible nature of DFOB accumulation in the montmorillonite interlayer leads to an apparent dependence of Pu sorption on the order of addition in the ternary system. This work demonstrates that the order of addition will be relevant in ternary systems in which at least one component exhibits irreversible sorption behavior. Abstract Copyright (2015) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Boggs, Mark A AU - Dai, Zurong AU - Kersting, Annie B AU - Zavarin, Mavrik Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 90 EP - 96 PB - Elsevier, Oxford VL - 141 SN - 0265-931X, 0265-931X KW - United States KW - silicates KW - hazardous waste KW - sorption KW - geologic hazards KW - X-ray diffraction data KW - isotopes KW - radioactivity KW - plutonium KW - power plants KW - humic acids KW - remediation KW - radioactive waste KW - environmental management KW - Nevada Test Site KW - radioactive isotopes KW - military geology KW - chemical reactions KW - energy sources KW - water pollution KW - Nevada KW - montmorillonite KW - colloidal materials KW - pollutants KW - oxidation KW - pollution KW - electron microscopy data KW - solubility KW - TEM data KW - clay minerals KW - organic compounds KW - organic acids KW - humic substances KW - soil pollution KW - metals KW - natural hazards KW - EXAFS data KW - sheet silicates KW - fulvic acids KW - waste disposal KW - military facilities 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/1689592740?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Plutonium%28IV%29+sorption+to+montmorillonite+in+the+presence+of+organic+matter&rft.au=Boggs%2C+Mark+A%3BDai%2C+Zurong%3BKersting%2C+Annie+B%3BZavarin%2C+Mavrik&rft.aulast=Boggs&rft.aufirst=Mark&rft.date=2015-03-01&rft.volume=141&rft.issue=&rft.spage=90&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2014.12.005 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. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-06-18 N1 - SubjectsTermNotLitGenreText - actinides; chemical reactions; clay minerals; colloidal materials; crystal chemistry; electron microscopy data; energy sources; environmental management; EXAFS data; fulvic acids; geologic hazards; hazardous waste; humic acids; humic substances; isotopes; metals; military facilities; military geology; montmorillonite; natural hazards; Nevada; Nevada Test Site; organic acids; organic compounds; oxidation; plutonium; pollutants; pollution; power plants; radioactive isotopes; radioactive waste; radioactivity; remediation; sheet silicates; silicates; soil pollution; solubility; sorption; TEM data; United States; waste disposal; water pollution; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.jenvrad.2014.12.005 ER - TY - JOUR T1 - Plutonium sorption and desorption behavior on bentonite AN - 1689592719; 2015-054448 AB - Understanding plutonium (Pu) sorption to, and desorption from, mineral phases is key to understanding its subsurface transport. In this work we study Pu(IV) sorption to industrial grade FEBEX bentonite over the concentration range 10 (super -7) -10 (super -16) M to determine if sorption at typical environmental concentrations ( or =10 (super -8) M, sorption was likely affected by additional Pu(IV) precipitation/polymerization reactions. The extent of sorption was similar to that previously reported for Pu(IV) sorption to SWy-1 Na-montmorillonite over a narrower range of Pu concentrations (10 (super -11) -10 (super -7) M). Sorption experiments with FEBEX bentonite and Pu(V) were also performed across a concentration range of 10 (super -11) -10 (super -7) M and over a 10 month period which allowed us to estimate the slow apparent rates of Pu(V) reduction on a smectite-rich clay. Finally, a flow cell experiment with Pu(IV) loaded on FEBEX bentonite demonstrated continued desorption of Pu over a 12 day flow period. Comparison with a desorption experiment performed with SWy-1 montmorillonite showed a strong similarity and suggested the importance of montorillonite phases in controlling Pu sorption/desorption reactions on FEBEX bentonite. Abstract Copyright (2015) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Begg, James D AU - Zavarin, Mavrik AU - Tumey, Scott J AU - Kersting, Annie B Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 106 EP - 114 PB - Elsevier, Oxford VL - 141 SN - 0265-931X, 0265-931X KW - solute transport KW - hazardous waste KW - sorption KW - desorption KW - Almeria Spain KW - isotopes KW - Spain KW - plutonium KW - Europe KW - polymerization KW - Iberian Peninsula KW - environmental analysis KW - Southern Europe KW - reservoir rocks KW - remediation KW - radioactive waste KW - laboratory studies KW - sedimentary rocks KW - radioactive isotopes KW - Andalusia Spain KW - transport KW - Callovian KW - water pollution KW - experimental studies KW - bentonite KW - Jurassic KW - pollutants KW - pollution KW - Middle Jurassic KW - Mesozoic KW - claystone KW - soil pollution KW - precipitation KW - metals KW - Cortijo de Archidona KW - mobilization KW - waste disposal KW - reactive barriers KW - clastic rocks KW - actinides 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/1689592719?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Plutonium+sorption+and+desorption+behavior+on+bentonite&rft.au=Begg%2C+James+D%3BZavarin%2C+Mavrik%3BTumey%2C+Scott+J%3BKersting%2C+Annie+B&rft.aulast=Begg&rft.aufirst=James&rft.date=2015-03-01&rft.volume=141&rft.issue=&rft.spage=106&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2014.12.002 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 - 51 N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-06-18 N1 - SubjectsTermNotLitGenreText - actinides; Almeria Spain; Andalusia Spain; bentonite; Callovian; clastic rocks; claystone; Cortijo de Archidona; desorption; environmental analysis; Europe; experimental studies; hazardous waste; Iberian Peninsula; isotopes; Jurassic; laboratory studies; Mesozoic; metals; Middle Jurassic; mobilization; plutonium; pollutants; pollution; polymerization; precipitation; radioactive isotopes; radioactive waste; reactive barriers; remediation; reservoir rocks; sedimentary rocks; soil pollution; solute transport; sorption; Southern Europe; Spain; transport; waste disposal; water pollution DO - http://dx.doi.org/10.1016/j.jenvrad.2014.12.002 ER - TY - JOUR T1 - Transient thermal protection of film covering circular aperture by sublimation and weak decomposition AN - 1685810608; PQ0001471025 AB - Unwanted heating of sensitive surfaces in harsh thermal environments can be prevented by precise application of sacrificial materials such as sublimation layers and pyrolyzing films. The use of sublimation for the protection of circular polyimide membranes subjected to brief (~100 ms) heating by infrared radiation and hot (6000 K) inert gas convection is analyzed. Selection of sublimation material and sublimation layer and membrane thickness is considered with emphasis on providing sufficient thermal protection yet negligible unwanted material remaining at the end of a specified heating period. Though the analysis here is general, the motivation is protection of the polyimide films covering the laser entrance holes on IFE (inertial fusion energy) hohlraums being injected into the hot gas (xenon) protecting IFE reactor chambers. Both one and two dimensional thermal models are used to develop a robust thermal concept. Sensitivity analyses (SA) methods are exercised to show where the design may be vulnerable and which input parameters have the greatest effect on performance and likelihood of success. For the design and conditions considered, methane sublimating layers are probably preferred over xenon or pentane. JF - Fusion Engineering and Design AU - Havstad, Mark A AU - Miles, Robin R AU - Hsieh, Henry AD - Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94551, United States Y1 - 2015/03// PY - 2015 DA - Mar 2015 SP - 59 EP - 68 PB - North-Holland, P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 92 SN - 0920-3796, 0920-3796 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 - Sublimation KW - Heat transfer KW - Sensitivity analysis KW - Variance decomposition KW - Latin hypercube KW - Xenon KW - Thermal protection KW - Heating KW - Design engineering KW - Circularity KW - Materials selection KW - Polyimide resins UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1685810608?accountid=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=Fusion+Engineering+and+Design&rft.atitle=Transient+thermal+protection+of+film+covering+circular+aperture+by+sublimation+and+weak+decomposition&rft.au=Havstad%2C+Mark+A%3BMiles%2C+Robin+R%3BHsieh%2C+Henry&rft.aulast=Havstad&rft.aufirst=Mark&rft.date=2015-03-01&rft.volume=92&rft.issue=&rft.spage=59&rft.isbn=&rft.btitle=&rft.title=Fusion+Engineering+and+Design&rft.issn=09203796&rft_id=info:doi/10.1016%2Fj.fusengdes.2015.01.031 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-06-01 N1 - Last updated - 2015-12-07 DO - http://dx.doi.org/10.1016/j.fusengdes.2015.01.031 ER - TY - JOUR T1 - On the generation of tangential ground motion by underground explosions in jointed rocks AN - 1680752900; 2015-041995 AB - This paper describes computational studies of tangential ground motions generated by spherical explosions in a heavily jointed granite formation. Various factors affecting the shear wave generation are considered, including joint spacing, orientation and frictional properties. Simulations are performed both in 2-D for a single joint set to elucidate the basic response mechanisms, and in 3-D for multiple joint sets to realistically represent in situ conditions in a realistic geological setting. The joints are modelled explicitly using both contact elements and weakness planes in the material. Simulations are performed both deterministically and stochastically to quantify the effects of geological uncertainties on near field ground motions. The mechanical properties of the rock and the joints as well as the joint spacing and orientation are taken from experimental test data and geophysical logs corresponding to the Climax Stock granitic outcrop, which is the geological setting of the source physics experiment (SPE). Agreement between simulation results and near field wave motion data from SPE enables newfound understanding of the origin and extent of non-spherical motions associated with underground explosions in fractured geological media. JF - Geophysical Journal International AU - Vorobiev, Oleg AU - Ezzedine, Souheil AU - Antoun, Tarabay AU - Glenn, Lewis Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 1651 EP - 1661 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 - body waves KW - monitoring KW - explosions KW - igneous rocks KW - granites KW - joints KW - elastic waves KW - fractures KW - plutonic rocks KW - ground motion KW - seismic waves KW - S-waves KW - faults KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680752900?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=On+the+generation+of+tangential+ground+motion+by+underground+explosions+in+jointed+rocks&rft.au=Vorobiev%2C+Oleg%3BEzzedine%2C+Souheil%3BAntoun%2C+Tarabay%3BGlenn%2C+Lewis&rft.aulast=Vorobiev&rft.aufirst=Oleg&rft.date=2015-03-01&rft.volume=200&rft.issue=3&rft.spage=1651&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu478 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 - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; Comprehensive Test Ban Treaty; elastic waves; explosions; faults; fractures; granites; ground motion; igneous rocks; joints; monitoring; plutonic rocks; S-waves; seismic waves DO - http://dx.doi.org/10.1093/gji/ggu478 ER - TY - CPAPER T1 - Adaptive Optics for Exoplanets: Algorithms and Technologies T2 - 2015 Annual Meeting of the American Association for the Advancement of Science (AAAS 2015) AN - 1658699565; 6338838 JF - 2015 Annual Meeting of the American Association for the Advancement of Science (AAAS 2015) AU - Poyneer, Lisa Y1 - 2015/02/12/ PY - 2015 DA - 2015 Feb 12 KW - Optics KW - Algorithms KW - Technology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1658699565?accountid=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+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2015%29&rft.atitle=Adaptive+Optics+for+Exoplanets%3A+Algorithms+and+Technologies&rft.au=Poyneer%2C+Lisa&rft.aulast=Poyneer&rft.aufirst=Lisa&rft.date=2015-02-12&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2015+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2015%29&rft.issn=&rft_id=info:doi/ L2 - https://aaas.confex.com/aaas/2015/webprogram/meeting2015-02-11.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-02-28 N1 - Last updated - 2015-02-27 ER - TY - CPAPER T1 - Nanosims Isotopic Imaging of C and N Assimilation in Complex Microbial Communities T2 - 2015 Annual Meeting of the American Association for the Advancement of Science (AAAS 2015) AN - 1658698862; 6338552 JF - 2015 Annual Meeting of the American Association for the Advancement of Science (AAAS 2015) AU - Pett-Ridge, Jennifer Y1 - 2015/02/12/ PY - 2015 DA - 2015 Feb 12 KW - Microbial activity KW - Imaging techniques UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1658698862?accountid=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+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2015%29&rft.atitle=Nanosims+Isotopic+Imaging+of+C+and+N+Assimilation+in+Complex+Microbial+Communities&rft.au=Pett-Ridge%2C+Jennifer&rft.aulast=Pett-Ridge&rft.aufirst=Jennifer&rft.date=2015-02-12&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2015+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2015%29&rft.issn=&rft_id=info:doi/ L2 - https://aaas.confex.com/aaas/2015/webprogram/meeting2015-02-11.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-02-28 N1 - Last updated - 2015-02-27 ER - TY - CPAPER T1 - Simulating and Visualizing the Electrophysiology of the Human Heart T2 - 2015 Annual Meeting of the American Association for the Advancement of Science (AAAS 2015) AN - 1658697337; 6338610 JF - 2015 Annual Meeting of the American Association for the Advancement of Science (AAAS 2015) AU - Streitz, Frederick Y1 - 2015/02/12/ PY - 2015 DA - 2015 Feb 12 KW - Heart KW - Electrophysiology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1658697337?accountid=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+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2015%29&rft.atitle=Simulating+and+Visualizing+the+Electrophysiology+of+the+Human+Heart&rft.au=Streitz%2C+Frederick&rft.aulast=Streitz&rft.aufirst=Frederick&rft.date=2015-02-12&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2015+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2015%29&rft.issn=&rft_id=info:doi/ L2 - https://aaas.confex.com/aaas/2015/webprogram/meeting2015-02-11.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-02-28 N1 - Last updated - 2015-02-27 ER - TY - JOUR T1 - Algorithmically scalable block preconditioner for fully implicit shallow-water equations in CAM-SE AN - 1832637739; 741119-4 AB - Performing accurate and efficient numerical simulation of global atmospheric climate models is challenging due to the disparate length and time scales over which physical processes interact. Implicit solvers enable the physical system to be integrated with a time step commensurate with processes being studied. The dominant cost of an implicit time step is the ancillary linear system solves, so we have developed a preconditioner aimed at improving the efficiency of these linear system solves. Our preconditioner is based on an approximate block factorization of the linearized shallow-water equations and has been implemented within the spectral element dynamical core within the Community Atmospheric Model (CAM-SE). In this paper, we discuss the development and scalability of the preconditioner for a suite of test cases with the implicit shallow-water solver within CAM-SE. Copyright 2014 Springer International Publishing Switzerland JF - Computational Geosciences AU - Lott, P Aaron AU - Woodward, Carol S AU - Evans, Katherine J Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 49 EP - 61 PB - Springer, Dordrecht VL - 19 IS - 1 SN - 1420-0597, 1420-0597 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832637739?accountid=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=Algorithmically+scalable+block+preconditioner+for+fully+implicit+shallow-water+equations+in+CAM-SE&rft.au=Lott%2C+P+Aaron%3BWoodward%2C+Carol+S%3BEvans%2C+Katherine+J&rft.aulast=Lott&rft.aufirst=P&rft.date=2015-02-01&rft.volume=19&rft.issue=1&rft.spage=49&rft.isbn=&rft.btitle=&rft.title=Computational+Geosciences&rft.issn=14200597&rft_id=info:doi/10.1007%2Fs10596-014-9447-6 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/s10596-014-9447-6 ER - TY - JOUR T1 - Probabilistic geomechanical analysis of compartmentalization at the Snohvit CO (sub 2) sequestration project AN - 1707521817; 2015-084260 AB - Pressure buildup caused by large-scale CO (sub 2) injection is a key concern during a carbon sequestration project. Large overpressures can compromise seal integrity, reactivate faults, and induce seismicity. Furthermore, pressure buildup is directly related with storage capacity. In this work we study the geomechanical response to CO (sub 2) injection at Snohvit, to understand the potential for fault reactivation, leakage, and contamination of the producing interval through bounding faults. Furthermore, we evaluate the potential contribution of a structural component to reservoir compartmentalization. We combine simplified analytical models, based on critically stressed fracture theory and a Mohr-Coulomb failure criterion, with a rigorous sensitivity analysis. Large stress uncertainties are present and reflected in the modeling results. It was found that under the most likely stress state the faults are fairly stable and caprock hydrofracturing would be expected before fault reactivation. In most of the analyzed cases, the critical pressure perturbation needed for reactivation is above 13 MPa, which was the limiting pressure increase before reaching the fracture pressure. Faults were found to be approximately 20% less stable when considering variations in S (sub Hmax) orientation. In those cases, fault reactivation could be expected before caprock failure if injection continued. However, if the pressure increase did reach the critical values for seal failure estimated under the worst case (and least likely) stress state, no indication of such failure can be observed in the measured pressure response. Finally, the potential role of a structural component in the compartmentalization and fluid migration is difficult to assess due to the stress state uncertainty. Abstract Copyright (2014), The Authors. JF - Journal of Geophysical Research: Solid Earth AU - Chiaramonte, Laura AU - White, Joshua A AU - Trainor-Guitton, Whitney Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 1195 EP - 1209 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 2 SN - 2169-9313, 2169-9313 KW - Hammerfest Basin KW - carbon sequestration KW - petroleum KW - oil and gas fields KW - Snohvit Field KW - rock mechanics KW - reservoir rocks KW - carbon dioxide KW - seismicity KW - Barents Sea KW - cap rocks KW - Arctic Ocean KW - tectonics KW - active faults KW - seismotectonics KW - faults KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707521817?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Probabilistic+geomechanical+analysis+of+compartmentalization+at+the+Snohvit+CO+%28sub+2%29+sequestration+project&rft.au=Chiaramonte%2C+Laura%3BWhite%2C+Joshua+A%3BTrainor-Guitton%2C+Whitney&rft.aulast=Chiaramonte&rft.aufirst=Laura&rft.date=2015-02-01&rft.volume=120&rft.issue=2&rft.spage=1195&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2014JB011376 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 - 40 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2015-08-27 N1 - SubjectsTermNotLitGenreText - active faults; Arctic Ocean; Barents Sea; cap rocks; carbon dioxide; carbon sequestration; faults; Hammerfest Basin; oil and gas fields; petroleum; reservoir rocks; rock mechanics; seismicity; seismotectonics; Snohvit Field; tectonics DO - http://dx.doi.org/10.1002/2014JB011376 ER - TY - JOUR T1 - The structure of the crust in the Turkish-Iranian Plateau and Zagros using Lg Q and velocity AN - 1686062769; 2015-049757 AB - We present a new approach for understanding the origin and nature of seismic anomalies in the continental crust of the northern Middle East. We have created detailed attenuation (Q (sub Lg) ) and velocity (V (sub Lg) ) models for the northern Middle East based on the analysis of waveforms of regional seismic phase Lg from 3171 regional earthquakes recorded at 578 stations in Turkish and Iranian Plateaus and surrounding regions. The attenuation and velocity models are assumed to serve as proxies for the bulk average crustal shear wave attenuation (Qbeta ) and velocities (V (sub s) ). 31 232 reliable Lg spectra were collected and used to measure the two-station method (TSM) and reverse two-station/event method (RTM) Lg Q at 1 Hz (Q (sub 0) ) and its frequency-dependence factor (eta ). The Lg Q (sub 0) and eta values are measured over the individual TSM and RTM paths and are then used to perform an LSQR tomographic inversion for lateral variations in Q (sub 0) and eta . The Lg Q (sub 0) and eta models both correlate well with the major tectonic boundaries in the region. The tomographic models as well as the individual TSM and RTM measurements show lower values of Lg Q (sub 0) over the Turkish-Anatolian Plateau (<150) than those observed over the Iranian Plateau (150-400). Furthermore, we obtained the Lg group velocity model by inverting the time of the first arrival of the Lg waveform on each seismogram. Our Q measurements are strongly correlated with the measurements of Lg group velocity (V (sub Lg) ) suggesting that the source of many of the low Q and velocity anomalies is likely the same. The regions where we see negative correlations are likely a result of Sn to Lg converted energy. Our results also have implications for the far field ground motions, suggesting that large earthquakes in eastern Iran could have a significant far field ground motions due to relatively low crustal attenuation within the Iranian plateau. JF - Geophysical Journal International AU - Kaviani, Ayoub AU - Sandvol, Eric AU - Bao, Xueyang AU - Ruempker, Georg AU - Goek, Rengin Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 1252 EP - 1266 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 - Zagros KW - seismograms KW - Iran KW - guided waves KW - Lg-waves KW - Turkey KW - elastic waves KW - continental crust KW - models KW - attenuation KW - surface waves KW - Love waves KW - seismicity KW - magmas KW - velocity structure KW - seismic waves KW - algorithms KW - Asia KW - earthquakes KW - Middle East KW - crust KW - 18:Solid-earth geophysics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686062769?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=The+structure+of+the+crust+in+the+Turkish-Iranian+Plateau+and+Zagros+using+Lg+Q+and+velocity&rft.au=Kaviani%2C+Ayoub%3BSandvol%2C+Eric%3BBao%2C+Xueyang%3BRuempker%2C+Georg%3BGoek%2C+Rengin&rft.aulast=Kaviani&rft.aufirst=Ayoub&rft.date=2015-02-01&rft.volume=200&rft.issue=2&rft.spage=1252&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu468 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 - 82 N1 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2015-06-05 N1 - SubjectsTermNotLitGenreText - algorithms; Asia; attenuation; continental crust; crust; earthquakes; elastic waves; guided waves; Iran; Lg-waves; Love waves; magmas; Middle East; models; seismic waves; seismicity; seismograms; surface waves; Turkey; velocity structure; Zagros DO - http://dx.doi.org/10.1093/gji/ggu468 ER - TY - JOUR T1 - Initial global seismic cross-correlation results; implications for empirical signal detectors AN - 1680751059; 2015-044439 AB - In this work, we cross-correlated waveforms in a global dataset consisting of over 310 million waveforms from nearly 3.8 million events recorded between 1970 and 2013 for two purposes: to better understand the nature of global seismicity and to evaluate correlation as a technique for automated event processing. We found that about 14.5% of the events for which we have at least one waveform correlated with at least one other event at the 0.6 or higher level. Within the geographic regions where our waveform holdings are complete or nearly complete, that fraction rose to nearly 18%. Moreover, among the events for which we had one or more seismograms recorded at distances less than 12 degrees , the fraction of correlated events was much higher, often exceeding 50%. These results imply that global seismicity contains a large number of repeating events, that is, events that are sufficiently similar to each other to have correlated waveforms over the time period spanned by our dataset. These results are very encouraging for using correlation in aspects of automated event processing. It is well known that because of the strongly implied similarity of the sources of correlated signals, they can be used as empirical signal detectors (ESD) to detect, locate, and identify an event using as few as one channel. Our results are very encouraging for using correlation and perhaps other forms of ESD for regional network processing and continental global processing because, for example, nearly all continental seismicity (99%) is within 12 degrees of at least one International Monitoring System station. JF - Bulletin of the Seismological Society of America AU - Dodge, D A AU - Walter, W R Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 240 EP - 256 PB - Seismological Society of America, Berkeley, CA VL - 105 IS - 1 SN - 0037-1106, 0037-1106 KW - seismograms KW - technology KW - monitoring KW - seismicity KW - crosscorrelation KW - global KW - statistical analysis KW - information management KW - signals KW - data management KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680751059?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Initial+global+seismic+cross-correlation+results%3B+implications+for+empirical+signal+detectors&rft.au=Dodge%2C+D+A%3BWalter%2C+W+R&rft.aulast=Dodge&rft.aufirst=D&rft.date=2015-02-01&rft.volume=105&rft.issue=1&rft.spage=240&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120140166 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 - 27 N1 - PubXState - CA N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2016-10-25 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - crosscorrelation; data management; global; information management; monitoring; seismicity; seismograms; signals; statistical analysis; technology DO - http://dx.doi.org/10.1785/0120140166 ER - TY - JOUR T1 - Radioxenon production and transport from an underground nuclear detonation to ground surface AN - 1673367390; 2015-034154 AB - Radioxenon isotopes are considered as possible indicators for detecting and discriminating underground nuclear explosions. To monitor and sample the release of radioxenon isotopes, both independent and chain-reaction yields need to be considered together with multiphase transport in geological systems from the detonation point to the ground surface. For the sake of simplicity, modeling of radioxenon isotopic radioactivities has typically been focused either on chain reactions in a batch reactor without considering multiphase transport or on radionuclide transport with simplified reactions. Although numerical methods are available for integrating coupled differential equations of complex decay networks, the stiffness of ordinary differential equations due to greatly differing decay rates may require substantial additional effort to obtain solutions for the fully coupled system. For this reason, closed-form solutions for sequential reactions and numerical solutions for multiparent converging and multidaughter branching reactions were previously developed and used to simulate xenon isotopic radioactivities in the batch reactor mode. In this paper, we develop a fully coupled numerical model, which involves tracking 24 components (i.e., 22 radionuclide components plus air and water) in two phases to enhance model predictability of simultaneously simulating xenon isotopic transport and fully coupled chain reactions. To validate the numerical model and verify the corresponding computer code, we derived closed-form solutions for first-order xenon reactions in a batch reactor mode and for single-gas phase transport coupled with the xenon reactions in a one-dimensional column. Finally, cylindrical 3-D simulations of two-phase flow within a dual permeability fracture-matrix medium, simulating the geohydrologic regime of an underground nuclear explosion, indicate the existence of both a strong temporal and spatial dependence of xenon isotopic ratios sampled at the surface. In the example presented here, temporally evolving subsurface xenon isotopic ratios are found to migrate across the discrimination line delineating civilian nuclear activities from an underground nuclear explosion in the KALINOWSKI Multi-Isotope Ratio Chart. Copyright 2014 Springer Basel JF - Pure and Applied Geophysics AU - Sun, Yunwei AU - Carrigan, Charles R AU - Hao, Yue Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 243 EP - 265 PB - Birkhaeuser, Basel VL - 172 IS - 2 SN - 0033-4553, 0033-4553 KW - fractured materials KW - Xe-131 KW - isotopes KW - radioactivity KW - radioactive decay KW - simulation KW - stable isotopes KW - transport KW - noble gases KW - Xe-135 KW - reactive transport KW - Xe-133 KW - nuclear explosions KW - migration KW - monitoring KW - numerical models KW - gaseous phase KW - three-dimensional models KW - explosions KW - isotope ratios KW - mathematical models KW - xenon KW - depth KW - detection KW - permeability KW - 19:Seismology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673367390?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Radioxenon+production+and+transport+from+an+underground+nuclear+detonation+to+ground+surface&rft.au=Sun%2C+Yunwei%3BCarrigan%2C+Charles+R%3BHao%2C+Yue&rft.aulast=Sun&rft.aufirst=Yunwei&rft.date=2015-02-01&rft.volume=172&rft.issue=2&rft.spage=243&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-014-0863-2 L2 - http://link.springer.de/link/service/journals/00024/index.htm 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 - 40 N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-04-16 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - depth; detection; explosions; fractured materials; gaseous phase; isotope ratios; isotopes; mathematical models; migration; monitoring; noble gases; nuclear explosions; numerical models; permeability; radioactive decay; radioactivity; reactive transport; simulation; stable isotopes; three-dimensional models; transport; Xe-131; Xe-133; Xe-135; xenon DO - http://dx.doi.org/10.1007/s00024-014-0863-2 ER - TY - JOUR T1 - Inferring aftershock sequence properties and tectonic structure using empirical signal detectors AN - 1673366086; 2015-034160 AB - Seismotectonic studies of the 2008 Storfjorden aftershock sequence were limited to data acquired by the permanent, but sparse, regional seismic network in the Svalbard archipelago. Storfjorden's remote location and harsh polar environment inhibited deployment of temporary seismometers that would have improved observations of sequence events. The lack of good station coverage prevented the detection and computation of hypocenter locations of many low magnitude events (mb < 2.5) in the NORSAR analyst-reviewed bulletin. As a result, the fine structure of the sequence's space-time distribution was not captured. In this study, an autonomous event detection and clustering framework is employed to build a more complete catalog of Storfjorden events using data from the Spitsbergen (SPITS) array. The new catalog allows the spatiotemporal distribution of seismicity within the fjord to be studied in greater detail. Information regarding the location of active event clusters provides a means of inferring the tectonic structure within the fault zone. The distribution of active clusters and moment tensor solutions for the Storfjorden sequence suggests there are at least two different structures within the fjord: a NE-SW trending linear feature with oblique-normal to strike-slip faulting and E-W trending normal faults. Copyright 2015 Springer Basel and 2014 Springer Basel (outside the USA) JF - Pure and Applied Geophysics AU - Junek, William N AU - Kvaerna, Tormod AU - Pirli, Myrto AU - Schweitzer, Johannes AU - Harris, David B AU - Dodge, Douglas A AU - Woods, Mark T Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 359 EP - 373 PB - Birkhaeuser, Basel VL - 172 IS - 2 SN - 0033-4553, 0033-4553 KW - monitoring KW - Svalbard KW - Arctic region KW - data processing KW - strike-slip faults KW - spatial distribution KW - aftershocks KW - detection KW - moment tensors KW - seismicity KW - normal faults KW - Storfjorden earthquake 2008 KW - temporal distribution KW - tectonics KW - seismic networks KW - earthquakes KW - seismotectonics KW - faults KW - fault zones KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366086?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Inferring+aftershock+sequence+properties+and+tectonic+structure+using+empirical+signal+detectors&rft.au=Junek%2C+William+N%3BKvaerna%2C+Tormod%3BPirli%2C+Myrto%3BSchweitzer%2C+Johannes%3BHarris%2C+David+B%3BDodge%2C+Douglas+A%3BWoods%2C+Mark+T&rft.aulast=Junek&rft.aufirst=William&rft.date=2015-02-01&rft.volume=172&rft.issue=2&rft.spage=359&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-014-0938-0 L2 - http://link.springer.de/link/service/journals/00024/index.htm 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 - 19 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2015-04-16 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - aftershocks; Arctic region; data processing; detection; earthquakes; fault zones; faults; moment tensors; monitoring; normal faults; seismic networks; seismicity; seismotectonics; spatial distribution; Storfjorden earthquake 2008; strike-slip faults; Svalbard; tectonics; temporal distribution DO - http://dx.doi.org/10.1007/s00024-014-0938-0 ER - TY - JOUR T1 - The parametric sensitivity of CAM5's MJO AN - 1668256304; PQ0001291857 AB - We systematically explore the ability of the Community Atmospheric Model version 5 (CAM5) to simulate the Madden-Julian Oscillation (MJO), through an analysis of MJO metrics calculated from a 1100-member perturbed parameter ensemble of 5year simulations with observed sea surface temperatures. Parameters from the deep convection scheme make the greatest contribution to the variance in MJO simulation quality with a much smaller contribution from parameters in the large-scale cloud, shallow convection, and boundary layer turbulence schemes. Improved MJO variability results from a larger lateral entrainment rate and a reduction in the precipitation efficiency of deep convection that was achieved by a smaller autoconversion of cloud to rainwater and a larger evaporation of convective precipitation. Unfortunately, simulations with an improved MJO also have a significant negative impact on the climatological values of low-level cloud and absorbed shortwave radiation, suggesting that structural in addition to parametric modifications to CAM5's parameterization suite are needed in order to simultaneously well simulate the MJO and mean-state climate. Key Points * Parameter values that improve CAM5's Madden-Julian Oscillation are identified * Both microphysical and macrophysical deep convection parameters are important * Simultaneously simulating the MJO and the mean climate is challenging JF - Journal of Geophysical Research: Atmospheres AU - Boyle, J S AU - Klein, SA AU - Lucas, D D AU - Ma, H-Y AU - Tannahill, J AU - Xie, S AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 1424 EP - 1444 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 120 IS - 4 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Convection KW - Entrainment KW - Evaporation KW - Climate change KW - Convection development KW - turbulence KW - Atmospheric models KW - Radiation KW - Boundary layer turbulence KW - Turbulent boundary layer KW - Atmospheric precipitations KW - Biological surveys KW - Simulation Analysis KW - Climates KW - Precipitation KW - Convective precipitation KW - Water temperature KW - Air-water interface KW - Madden-Julian oscillation KW - Convective Precipitation KW - Clouds KW - Numerical simulations KW - Boundary layers KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 0810:General KW - M2 556.13:Evaporation/Evapotranspiration (556.13) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668256304?accountid=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=The+parametric+sensitivity+of+CAM5%27s+MJO&rft.au=Boyle%2C+J+S%3BKlein%2C+SA%3BLucas%2C+D+D%3BMa%2C+H-Y%3BTannahill%2C+J%3BXie%2C+S&rft.aulast=Boyle&rft.aufirst=J&rft.date=2015-02-01&rft.volume=120&rft.issue=4&rft.spage=1424&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2014JD022507 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Biological surveys; Atmospheric precipitations; Convection; Radiation; Boundary layers; Climate change; Water temperature; Air-water interface; Turbulent boundary layer; Clouds; Entrainment; Numerical simulations; Evaporation; Convection development; Convective precipitation; Precipitation; Boundary layer turbulence; Madden-Julian oscillation; Atmospheric models; Simulation Analysis; Climates; turbulence; Convective Precipitation DO - http://dx.doi.org/10.1002/2014JD022507 ER - TY - JOUR T1 - Metagenomic Analysis of the Airborne Environment in Urban Spaces AN - 1660434515; PQ0001029595 AB - The organisms in aerosol microenvironments, especially densely populated urban areas, are relevant to maintenance of public health and detection of potential epidemic or biothreat agents. To examine aerosolized microorganisms in this environment, we performed sequencing on the material from an urban aerosol surveillance program. Whole metagenome sequencing was applied to DNA extracted from air filters obtained during periods from each of the four seasons. The composition of bacteria, plants, fungi, invertebrates, and viruses demonstrated distinct temporal shifts. Bacillus thuringiensis serovar kurstaki was detected in samples known to be exposed to aerosolized spores, illustrating the potential utility of this approach for identification of intentionally introduced microbial agents. Together, these data demonstrate the temporally dependent metagenomic complexity of urban aerosols and the potential of genomic analytical techniques for biosurveillance and monitoring of threats to public health. JF - Microbial Ecology AU - Be, Nicholas A AU - Thissen, James B AU - Fofanov, Viacheslav Y AU - Allen, Jonathan E AU - Rojas, Mark AU - Golovko, George AU - Fofanov, Yuriy AU - Koshinsky, Heather AU - Jaing, Crystal J AD - Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, 94551, USA, jaing2@llnl.gov Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 346 EP - 355 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 69 IS - 2 SN - 0095-3628, 0095-3628 KW - Microbiology Abstracts C: Algology, Mycology & Protozoology; Genetics Abstracts; Ecology Abstracts KW - Aerosols KW - Epidemics KW - Data processing KW - Bacillus thuringiensis KW - Fungi KW - Public health KW - Filters KW - DNA sequencing KW - DNA KW - Microorganisms KW - Microenvironments KW - genomics KW - Plant viruses KW - Spores KW - G 07790:Other Microorganisms KW - K 03400:Human Diseases KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660434515?accountid=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=Microbial+Ecology&rft.atitle=Metagenomic+Analysis+of+the+Airborne+Environment+in+Urban+Spaces&rft.au=Be%2C+Nicholas+A%3BThissen%2C+James+B%3BFofanov%2C+Viacheslav+Y%3BAllen%2C+Jonathan+E%3BRojas%2C+Mark%3BGolovko%2C+George%3BFofanov%2C+Yuriy%3BKoshinsky%2C+Heather%3BJaing%2C+Crystal+J&rft.aulast=Be&rft.aufirst=Nicholas&rft.date=2015-02-01&rft.volume=69&rft.issue=2&rft.spage=346&rft.isbn=&rft.btitle=&rft.title=Microbial+Ecology&rft.issn=00953628&rft_id=info:doi/10.1007%2Fs00248-014-0517-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Number of references - 38 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Aerosols; Data processing; Epidemics; Fungi; Public health; Filters; DNA sequencing; Microorganisms; DNA; Microenvironments; genomics; Spores; Plant viruses; Bacillus thuringiensis DO - http://dx.doi.org/10.1007/s00248-014-0517-z ER - TY - JOUR T1 - Monotonicity in high-order curvilinear finite element arbitrary Lagrangian-Eulerian remap AN - 1654674176; PQ0001033591 AB - The remap phase in arbitrary Lagrangian-Eulerian (ALE) hydrodynamics involves the transfer of field quantities defined on a post-Lagrangian mesh to some new mesh, usually generated by a mesh optimization algorithm. This problem is often posed in terms of transporting (or advecting) some state variable from the old mesh to the new mesh over a fictitious time interval. It is imperative that this remap process be monotonic, that is, not generate any new extrema in the field variables. It is well known that the only linear methods that are guaranteed to be monotonic for such problems are first-order accurate; however, much work has been performed in developing non-linear methods, which blend both high and low (first) order solutions to achieve monotonicity and preserve high-order accuracy when the field is sufficiently smooth. In this paper, we present a set of methods for enforcing monotonicity targeting high-order discontinuous Galerkin methods for advection equations in the context of high-order curvilinear ALE hydrodynamics. Published 2014. This article is a U.S. Government work and is in the public domain in the USA. In this paper, we present a set of methods for enforcing monotonicity targeting high-order Discontinuous Galerkin (DG) methods for advection equations in the context of high-order curvilinear ALE hydrodynamics. JF - International Journal for Numerical Methods in Fluids AU - Anderson, R W AU - Dobrev, V A AU - Kolev, TzV AU - Rieben, R N AD - Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, Livermore, CA, USA. Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 249 EP - 273 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 77 IS - 5 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Mathematical models KW - Hydrodynamics KW - Algorithms KW - Advection KW - USA KW - Finite Element Method KW - Fluid dynamics KW - Optimization 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/1654674176?accountid=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=Monotonicity+in+high-order+curvilinear+finite+element+arbitrary+Lagrangian-Eulerian+remap&rft.au=Anderson%2C+R+W%3BDobrev%2C+V+A%3BKolev%2C+TzV%3BRieben%2C+R+N&rft.aulast=Anderson&rft.aufirst=R&rft.date=2015-02-01&rft.volume=77&rft.issue=5&rft.spage=249&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.3965 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-02-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Mathematical models; Fluid dynamics; Hydrodynamics; Finite Element Method; Algorithms; Optimization; Advection; USA DO - http://dx.doi.org/10.1002/fld.3965 ER - TY - JOUR T1 - Observed multivariable signals of late 20th and early 21st century volcanic activity AN - 1696877106; 2015-069408 AB - The relatively muted warming of the surface and lower troposphere since 1998 has attracted considerable attention. One contributory factor to this "warming hiatus" is an increase in volcanically induced cooling over the early 21st century. Here we identify the signals of late 20th and early 21st century volcanic activity in multiple observed climate variables. Volcanic signals are statistically discernible in spatial averages of tropical and near-global SST, tropospheric temperature, net clear-sky short-wave radiation, and atmospheric water vapor. Signals of late 20th and early 21st century volcanic eruptions are also detectable in near-global averages of rainfall. In tropical average rainfall, however, only a Pinatubo-caused drying signal is identifiable. Successful volcanic signal detection is critically dependent on removal of variability induced by the El Nino-Southern Oscillation. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Santer, Benjamin D AU - Solomon, Susan AU - Bonfils, Celine AU - Zelinka, Mark D AU - Painter, Jeffrey F AU - Beltran, Francisco AU - Fyfe, John C AU - Johannesson, Gardar AU - Mears, Carl AU - Ridley, David A AU - Vernier, Jean-Paul AU - Wentz, Frank J Y1 - 2015/01/28/ PY - 2015 DA - 2015 Jan 28 SP - 500 EP - 509 PB - American Geophysical Union, Washington, DC VL - 42 IS - 2 SN - 0094-8276, 0094-8276 KW - atmospheric circulation KW - ocean circulation KW - El Nino Southern Oscillation KW - volcanism KW - eruptions KW - climate effects KW - atmosphere KW - sea-surface temperature KW - climate change KW - temperature KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877106?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Observed+multivariable+signals+of+late+20th+and+early+21st+century+volcanic+activity&rft.au=Santer%2C+Benjamin+D%3BSolomon%2C+Susan%3BBonfils%2C+Celine%3BZelinka%2C+Mark+D%3BPainter%2C+Jeffrey+F%3BBeltran%2C+Francisco%3BFyfe%2C+John+C%3BJohannesson%2C+Gardar%3BMears%2C+Carl%3BRidley%2C+David+A%3BVernier%2C+Jean-Paul%3BWentz%2C+Frank+J&rft.aulast=Santer&rft.aufirst=Benjamin&rft.date=2015-01-28&rft.volume=42&rft.issue=2&rft.spage=500&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL062366 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 - atmosphere; atmospheric circulation; climate change; climate effects; El Nino Southern Oscillation; eruptions; ocean circulation; sea-surface temperature; temperature; volcanism DO - http://dx.doi.org/10.1002/2014GL062366 ER - TY - JOUR T1 - Shock compression of stishovite and melting of silica at planetary interior conditions AN - 1680753042; 2015-042001 AB - Deep inside planets, extreme density, pressure, and temperature strongly modify the properties of the constituent materials. In particular, how much heat solids can sustain before melting under pressure is key to determining a planet's internal structure and evolution. We report laser-driven shock experiments on fused silica, alpha -quartz, and stishovite yielding equation-of-state and electronic conductivity data at unprecedented conditions and showing that the melting temperature of SiO (sub 2) rises to 8300 K at a pressure of 500 gigapascals, comparable to the core-mantle boundary conditions for a 5-Earth mass super-Earth. We show that mantle silicates and core metal have comparable melting temperatures above 500 to 700 gigapascals, which could favor long-lived magma oceans for large terrestrial planets with implications for planetary magnetic-field generation in silicate magma layers deep inside such planets. JF - Science AU - Millot, M AU - Dubrovinskaia, N AU - Cernok, A AU - Blaha, S AU - Dubrovinsky, L AU - Braun, D G AU - Celliers, P M AU - Collins, G W AU - Eggert, J H AU - Jeanloz, R Y1 - 2015/01/23/ PY - 2015 DA - 2015 Jan 23 SP - 418 EP - 420 PB - American Association for the Advancement of Science, Washington, DC VL - 347 IS - 6220 SN - 0036-8075, 0036-8075 KW - silicates KW - pressure KW - extrasolar planets KW - silica minerals KW - mantle KW - stishovite KW - metamorphism KW - high pressure KW - core-mantle boundary KW - magnetic field KW - temperature KW - giant planets KW - outer core KW - lower mantle KW - planets KW - melting KW - silica KW - planetary interiors KW - framework silicates KW - core KW - compression KW - shock metamorphism KW - high temperature KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680753042?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Shock+compression+of+stishovite+and+melting+of+silica+at+planetary+interior+conditions&rft.au=Millot%2C+M%3BDubrovinskaia%2C+N%3BCernok%2C+A%3BBlaha%2C+S%3BDubrovinsky%2C+L%3BBraun%2C+D+G%3BCelliers%2C+P+M%3BCollins%2C+G+W%3BEggert%2C+J+H%3BJeanloz%2C+R&rft.aulast=Millot&rft.aufirst=M&rft.date=2015-01-23&rft.volume=347&rft.issue=6220&rft.spage=418&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1261507 L2 - http://www.sciencemag.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2016-10-25 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - compression; core; core-mantle boundary; extrasolar planets; framework silicates; giant planets; high pressure; high temperature; lower mantle; magnetic field; mantle; melting; metamorphism; outer core; planetary interiors; planets; pressure; shock metamorphism; silica; silica minerals; silicates; stishovite; temperature DO - http://dx.doi.org/10.1126/science.1261507 ER - TY - JOUR T1 - Human in Vivo Pharmacokinetics of [(14)C]Dibenzo[def,p]chrysene by Accelerator Mass Spectrometry Following Oral Microdosing. AN - 1736414829; 25418912 AB - Dibenzo(def,p)chrysene (DBC), (also known as dibenzo[a,l]pyrene), is a high molecular weight polycyclic aromatic hydrocarbon (PAH) found in the environment, including food, produced by the incomplete combustion of hydrocarbons. DBC, classified by IARC as a 2A probable human carcinogen, has a relative potency factor (RPF) in animal cancer models 30-fold higher than benzo[a]pyrene. No data are available describing the disposition of high molecular weight (>4 rings) PAHs in humans to compare to animal studies. Pharmacokinetics of DBC was determined in 3 female and 6 male human volunteers following oral microdosing (29 ng, 5 nCi) of [(14)C]-DBC. This study was made possible with highly sensitive accelerator mass spectrometry (AMS), capable of detecting [(14)C]-DBC equivalents in plasma and urine following a dose considered of de minimus risk to human health. Plasma and urine were collected over 72 h. The plasma Cmax was 68.8 ± 44.3 fg·mL(-1) with a Tmax of 2.25 ± 1.04 h. Elimination occurred in two distinct phases: a rapid (α)-phase, with a T1/2 of 5.8 ± 3.4 h and an apparent elimination rate constant (Kel) of 0.17 ± 0.12 fg·h(-1), followed by a slower (β)-phase, with a T1/2 of 41.3 ± 29.8 h and an apparent Kel of 0.03 ± 0.02 fg·h(-1). In spite of the high degree of hydrophobicity (log Kow of 7.4), DBC was eliminated rapidly in humans, as are most PAHs in animals, compared to other hydrophobic persistent organic pollutants such as, DDT, PCBs and TCDD. Preliminary examination utilizing a new UHPLC-AMS interface, suggests the presence of polar metabolites in plasma as early as 45 min following dosing. This is the first in vivo data set describing pharmacokinetics in humans of a high molecular weight PAH and should be a valuable addition to risk assessment paradigms. JF - Chemical research in toxicology AU - Madeen, Erin AU - Corley, Richard A AU - Crowell, Susan AU - Turteltaub, Kenneth AU - Ognibene, Ted AU - Malfatti, Mike AU - McQuistan, Tammie J AU - Garrard, Mary AU - Sudakin, Dan AU - Williams, David E AD - Systems Toxicology & Exposure Science, Pacific Northwest National Laboratory , Richland, Washington 99354, United States. ; Biology and Biotechnology Research Division, and ¶the Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory , Livermore, California 94550, United States. Y1 - 2015/01/20/ PY - 2015 DA - 2015 Jan 20 SP - 126 EP - 134 VL - 28 IS - 1 KW - Benzopyrenes KW - 0 KW - Carcinogens KW - dibenzo(a,l)pyrene KW - G3X629VE4A KW - Index Medicus KW - Administration, Oral KW - Young Adult KW - Mass Spectrometry KW - Humans KW - Adult KW - Aged KW - Middle Aged KW - Male KW - Female KW - Carcinogens -- administration & dosage KW - Carcinogens -- pharmacokinetics KW - Benzopyrenes -- pharmacokinetics KW - Benzopyrenes -- administration & dosage UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1736414829?accountid=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+research+in+toxicology&rft.atitle=Human+in+Vivo+Pharmacokinetics+of+%5B%2814%29C%5DDibenzo%5Bdef%2Cp%5Dchrysene+by+Accelerator+Mass+Spectrometry+Following+Oral+Microdosing.&rft.au=Madeen%2C+Erin%3BCorley%2C+Richard+A%3BCrowell%2C+Susan%3BTurteltaub%2C+Kenneth%3BOgnibene%2C+Ted%3BMalfatti%2C+Mike%3BMcQuistan%2C+Tammie+J%3BGarrard%2C+Mary%3BSudakin%2C+Dan%3BWilliams%2C+David+E&rft.aulast=Madeen&rft.aufirst=Erin&rft.date=2015-01-20&rft.volume=28&rft.issue=1&rft.spage=126&rft.isbn=&rft.btitle=&rft.title=Chemical+research+in+toxicology&rft.issn=1520-5010&rft_id=info:doi/10.1021%2Ftx5003996 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-09-12 N1 - Date created - 2015-11-24 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Mutat Res. 2000 Dec 20;472(1-2):119-27 [11113704] Gut. 1999 Jul;45 Suppl 1:I18-22 [10457031] Cancer Lett. 1999 Sep 1;143(2):161-5 [10503897] Environ Mol Mutagen. 2005 Mar-Apr;45(2-3):106-14 [15688365] Mass Spectrom Rev. 2006 Jan-Feb;25(1):127-45 [16059873] Cancer Res. 2006 Jan 15;66(2):755-62 [16424006] Drug Metab Pharmacokinet. 2006 Aug;21(4):257-76 [16946553] Carcinogenesis. 2006 Oct;27(10):2116-23 [16704990] Int J Environ Res Public Health. 2008 Mar;5(1):41-8 [18441404] Carcinogenesis. 2008 Aug;29(8):1581-6 [18635525] Toxicol Appl Pharmacol. 2008 Dec 15;233(3):454-8 [18848954] Cancer Prev Res (Phila). 2008 Jul;1(2):128-34 [19138945] Carcinogenesis. 2009 Feb;30(2):315-20 [19073876] Chem Res Toxicol. 2010 May 17;23(5):900-8 [20369855] Cancer Prev Res (Phila). 2009 Dec;2(12):1015-22 [19952359] Bioanalysis. 2010 Mar;2(3):441-54 [21083254] Adv Drug Deliv Rev. 2011 Jun 19;63(7):518-31 [21047543] J Pharmacol Exp Ther. 2011 Jul;338(1):353-61 [21515812] Toxicol Appl Pharmacol. 2011 Dec 15;257(3):365-76 [22001385] Cancer Lett. 2012 Apr 1;317(1):49-55 [22085489] Chem Res Toxicol. 2012 Mar 19;25(3):513-31 [22309195] J Pharmacol Exp Ther. 2012 Sep;342(3):750-60 [22674470] Biomarkers. 2013 Mar;18(2):144-50 [23336104] Environ Int. 2013 Apr;54:11-7 [23376598] Anal Chem. 2013 Apr 2;85(7):3644-50 [23413773] Toxicol Sci. 2013 Sep;135(1):48-62 [23744095] Toxicol Lett. 2014 Jul 3;228(1):48-55 [24769260] Food Chem Toxicol. 2001 May;39(5):423-36 [11313108] Environ Mol Mutagen. 2003;41(2):131-9 [12605383] Anal Chem. 2003 May 1;75(9):2192-6 [12720362] J Nutr. 2004 Aug;134(8):2011-4 [15284391] J Environ Pathol Toxicol. 1981 Sep;5(1):1-364 [7310260] Cancer Lett. 1984 Dec;25(2):195-201 [6509438] Can J Physiol Pharmacol. 1986 Sep;64(9):1214-8 [3096546] Toxicol Ind Health. 1991 May;7(3):141-57 [1949056] Food Addit Contam. 1991 Jul-Aug;8(4):517-30 [1806403] Phys Med Biol. 1997 Feb;42(2):407-13 [9044422] Can J Physiol Pharmacol. 1997 Mar;75(3):185-92 [9164700] Drug Metab Dispos. 1998 Aug;26(8):825-8 [9698300] Cancer Epidemiol Biomarkers Prev. 1999 Jun;8(6):507-12 [10385140] Cancer Lett. 1999 Sep 1;143(2):135-8 [10503892] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/tx5003996 ER - TY - JOUR T1 - Meiotic interstrand DNA damage escapes paternal repair and causes chromosomal aberrations in the zygote by maternal misrepair. AN - 1645779818; 25567288 AB - De novo point mutations and chromosomal structural aberrations (CSA) detected in offspring of unaffected parents show a preferential paternal origin with higher risk for older fathers. Studies in rodents suggest that heritable mutations transmitted from the father can arise from either paternal or maternal misrepair of damaged paternal DNA, and that the entire spermatogenic cycle can be at risk after mutagenic exposure. Understanding the susceptibility and mechanisms of transmission of paternal mutations is important in family planning after chemotherapy and donor selection for assisted reproduction. We report that treatment of male mice with melphalan (MLP), a bifunctional alkylating agent widely used in chemotherapy, induces DNA lesions during male mouse meiosis that persist unrepaired as germ cells progress through DNA repair-competent phases of spermatogenic development. After fertilization, unrepaired sperm DNA lesions are mis-repaired into CSA by the egg's DNA repair machinery producing chromosomally abnormal offspring. These findings highlight the importance of both pre- and post-fertilization DNA repair in assuring the genomic integrity of the conceptus. JF - Scientific reports AU - Marchetti, Francesco AU - Bishop, Jack AU - Gingerich, John AU - Wyrobek, Andrew J AD - 1] Environmental Health Science Research Bureau, Health Canada, Ottawa, Ontario, Canada, K1A 0K9 [2] Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA 94720 [3] Biosciences Department, Lawrence Livermore National Laboratory, Livermore, California 94550, USA. ; National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, USA. ; Environmental Health Science Research Bureau, Health Canada, Ottawa, Ontario, Canada, K1A 0K9. ; 1] Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA 94720 [2] Biosciences Department, Lawrence Livermore National Laboratory, Livermore, California 94550, USA. Y1 - 2015/01/08/ PY - 2015 DA - 2015 Jan 08 SP - 7689 VL - 5 KW - Melphalan KW - Q41OR9510P KW - Index Medicus KW - Spermatozoa -- physiology KW - Animals KW - DNA Repair KW - Spermatozoa -- drug effects KW - Mice KW - Male KW - Chromosome Aberrations -- drug effects KW - Meiosis -- drug effects KW - Zygote -- physiology KW - Zygote -- growth & development KW - Zygote -- drug effects KW - Melphalan -- toxicity KW - DNA Damage -- drug effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645779818?accountid=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=Meiotic+interstrand+DNA+damage+escapes+paternal+repair+and+causes+chromosomal+aberrations+in+the+zygote+by+maternal+misrepair.&rft.au=Marchetti%2C+Francesco%3BBishop%2C+Jack%3BGingerich%2C+John%3BWyrobek%2C+Andrew+J&rft.aulast=Marchetti&rft.aufirst=Francesco&rft.date=2015-01-08&rft.volume=5&rft.issue=&rft.spage=7689&rft.isbn=&rft.btitle=&rft.title=Scientific+reports&rft.issn=2045-2322&rft_id=info:doi/10.1038%2Fsrep07689 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-02-18 N1 - Date created - 2015-01-08 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Proc Natl Acad Sci U S A. 1979 Jan;76(1):435-7 [284360] Gamete Res. 1987 Sep;18(1):77-83 [3507364] J Cell Sci. 1990 Sep;97 ( Pt 1):1-3 [2175310] Mutat Res. 1992 Jul;282(3):151-8 [1378547] Proc Natl Acad Sci U S A. 1992 Jul 1;89(13):6182-6 [1352884] Mutat Res. 1994 Dec;318(3):205-26 [7527485] Mutat Res. 1995 Dec;345(3-4):167-80 [8552138] Mutat Res. 1996 Aug 17;355(1-2):13-40 [8781575] Nucleic Acids Res. 1997 Mar 15;25(6):1211-8 [9092631] Mol Hum Reprod. 1996 Jan;2(1):46-51 [9238657] Mutat Res. 1997 Dec 12;396(1-2):129-40 [9434864] Environ Mol Mutagen. 2012 Dec;53(9):725-40 [23065650] J Natl Cancer Inst. 2013 Feb 6;105(3):175-201 [23297039] Environ Mol Mutagen. 2000;36(4):255-65 [11152558] Nat Rev Genet. 2000 Oct;1(1):40-7 [11262873] Proc Natl Acad Sci U S A. 2001 Mar 27;98(7):3952-7 [11274416] Nat Rev Genet. 2001 Apr;2(4):280-91 [11283700] Mutat Res. 2001 Sep 4;486(4):217-47 [11516927] Reproduction. 2001 Jan;121(1):31-9 [11226027] Lancet. 2002 Aug 3;360(9330):361-7 [12241775] Mol Reprod Dev. 2003 Oct;66(2):172-80 [12950105] Biol Reprod. 2004 Mar;70(3):616-24 [14585809] Cancer Res. 1978 Jun;38(6):1502-6 [565677] Biochimie. 1998 Feb;80(2):117-28 [9587669] Environ Mol Mutagen. 1999;34(1):16-23 [10462719] Cytogenetics. 1964;3:289-94 [14248459] Genetica. 2004 Sep;122(1):25-36 [15619958] Birth Defects Res C Embryo Today. 2005 Jun;75(2):112-29 [16035041] Toxicol Appl Pharmacol. 2005 Sep 1;207(2 Suppl):521-31 [16051290] Hum Reprod. 2006 Apr;21(4):888-95 [16311288] DNA Repair (Amst). 2006 Aug 13;5(8):959-71 [16837249] Proc Natl Acad Sci U S A. 2007 Nov 6;104(45):17725-9 [17978187] Toxicol Sci. 2007 Dec;100(2):495-503 [17872895] DNA Repair (Amst). 2008 Apr 2;7(4):572-81 [18282746] Hum Mol Genet. 2008 Jul 1;17(13):1922-37 [18353795] Cell. 2008 Sep 19;134(6):969-80 [18805090] Philos Trans R Soc Lond B Biol Sci. 2010 May 27;365(1546):1663-78 [20403877] Environ Mol Mutagen. 2010 Jul;51(6):540-51 [20658646] Genes Dev. 2010 Aug 15;24(16):1680-94 [20713514] PLoS Genet. 2011 Jun;7(6):e1002094 [21655083] Nat Rev Cancer. 2011 Jul;11(7):467-80 [21701511] Nature. 2012 Aug 23;488(7412):471-5 [22914163] PLoS One. 2012;7(8):e43875 [22928046] Nat Genet. 2012 Oct;44(10):1161-5 [22922873] Cytogenet Cell Genet. 1981;29(4):189-97 [7016465] Cell. 1990 Aug 10;62(3):403-6 [2165864] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/srep07689 ER - TY - JOUR T1 - Seismic and geodynamic constraints on lower-mantle LSVP; implications for mantle upwellings AN - 1869032562; 2017-010636 JF - Abstract Volume (Geological Association of Canada) AU - Forte, Alessandro M AU - Gilsovic, Petar AU - Rowley, David B AU - Simmons, Nathan A AU - Grand, Stephen P AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 451 PB - Geological Association of Canada, Waterloo, ON VL - 38 SN - 1716-6098, 1716-6098 KW - tomography KW - East Pacific KW - Caroline Islands KW - upwelling KW - Cape Verde Islands KW - mantle KW - lower mantle KW - Atlantic Ocean Islands KW - geodynamics KW - seismicity KW - Pacific Ocean KW - Oceania KW - Micronesia KW - Africa KW - North Atlantic KW - heterogeneity KW - East Pacific Rise KW - mantle plumes KW - Atlantic Ocean KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869032562?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstract+Volume+%28Geological+Association+of+Canada%29&rft.atitle=Seismic+and+geodynamic+constraints+on+lower-mantle+LSVP%3B+implications+for+mantle+upwellings&rft.au=Forte%2C+Alessandro+M%3BGilsovic%2C+Petar%3BRowley%2C+David+B%3BSimmons%2C+Nathan+A%3BGrand%2C+Stephen+P%3BAnonymous&rft.aulast=Forte&rft.aufirst=Alessandro&rft.date=2015-01-01&rft.volume=38&rft.issue=&rft.spage=451&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, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - PubXState - ON N1 - Last updated - 2017-02-17 N1 - CODEN - PAACD6 N1 - SubjectsTermNotLitGenreText - Africa; Atlantic Ocean; Atlantic Ocean Islands; Cape Verde Islands; Caroline Islands; East Pacific; East Pacific Rise; geodynamics; heterogeneity; lower mantle; mantle; mantle plumes; Micronesia; North Atlantic; Oceania; Pacific Ocean; seismicity; tomography; upwelling ER - TY - JOUR T1 - Aluminum-magnesium chronology of the rim of a Murchison Type A CAI AN - 1859790455; 2017-003831 JF - Annual Meeting of the Meteoritical Society AU - Matzel, J AU - Jacobsen, B AU - Simon, J I AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 5372 PB - Meteoritical Society, [varies] VL - 78 SN - 0735-049X, 0735-049X KW - magnesium KW - stony meteorites KW - ion probe data KW - isotopes KW - calcium-aluminum inclusions KW - Mg-26 KW - mass spectra KW - stable isotopes KW - Murchison Meteorite KW - meteorites KW - radioactive isotopes KW - chronology KW - aluminum KW - Wark-Lovering rims KW - inclusions KW - Al-27/Al-26 KW - spectra KW - chondrites KW - alkaline earth metals KW - isotope ratios KW - thermal metamorphism KW - carbonaceous chondrites KW - metamorphism KW - solar nebula KW - aqueous alteration KW - metals KW - petrography KW - NanoSIMS KW - CM chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859790455?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Aluminum-magnesium+chronology+of+the+rim+of+a+Murchison+Type+A+CAI&rft.au=Matzel%2C+J%3BJacobsen%2C+B%3BSimon%2C+J+I%3BAnonymous&rft.aulast=Matzel&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/5372.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 - Last updated - 2017-01-19 N1 - SubjectsTermNotLitGenreText - Al-27/Al-26; alkaline earth metals; aluminum; aqueous alteration; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; chronology; CM chondrites; inclusions; ion probe data; isotope ratios; isotopes; magnesium; mass spectra; metals; metamorphism; meteorites; Mg-26; Murchison Meteorite; NanoSIMS; petrography; radioactive isotopes; solar nebula; spectra; stable isotopes; stony meteorites; thermal metamorphism; Wark-Lovering rims ER - TY - JOUR T1 - The strontium, barium, neodymium, and samarium isotopic compositions of non-Allende CAIs AN - 1855320927; 2017-002485 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Shollenberger, Q R AU - Brennecka, G A AU - Borg, L E AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2593 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - Northwest Africa Meteorites KW - alkaline earth metals KW - NWA 6619 KW - stony meteorites KW - isotopes KW - calcium-aluminum inclusions KW - thermal ionization mass spectra KW - mass spectra KW - carbonaceous chondrites KW - CV chondrites KW - meteorites KW - barium KW - NWA 6991 KW - metals KW - inclusions KW - CK chondrites KW - spectra KW - samarium KW - rare earths KW - neodymium KW - chondrites KW - strontium KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855320927?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+strontium%2C+barium%2C+neodymium%2C+and+samarium+isotopic+compositions+of+non-Allende+CAIs&rft.au=Shollenberger%2C+Q+R%3BBrennecka%2C+G+A%3BBorg%2C+L+E%3BAnonymous&rft.aulast=Shollenberger&rft.aufirst=Q&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/2593.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 - 8 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Apr. 8, 2016 N1 - Last updated - 2017-01-05 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; barium; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; CK chondrites; CV chondrites; inclusions; isotopes; mass spectra; metals; meteorites; neodymium; Northwest Africa Meteorites; NWA 6619; NWA 6991; rare earths; samarium; spectra; stony meteorites; strontium; thermal ionization mass spectra ER - TY - JOUR T1 - The search for supernovae fingerprints in the early solar system; no signs of live (super 126) Sn in Allende CAIs AN - 1855320794; 2017-002489 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Brennecka, G A AU - Borg, L E AU - Romaniello, S J AU - Souders, A K AU - Wadhwa, M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1813 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - stony meteorites KW - isotopes KW - tellurium KW - calcium-aluminum inclusions KW - mass spectra KW - Sn-126 KW - tin KW - CV chondrites KW - short-lived isotopes KW - Allende Meteorite KW - meteorites KW - radioactive isotopes KW - r-process KW - volatile elements KW - inclusions KW - spectra KW - chondrites KW - supernovas KW - nucleosynthesis KW - carbonaceous chondrites KW - early solar system KW - ICP mass spectra KW - stars KW - metals KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855320794?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+search+for+supernovae+fingerprints+in+the+early+solar+system%3B+no+signs+of+live+%28super+126%29+Sn+in+Allende+CAIs&rft.au=Brennecka%2C+G+A%3BBorg%2C+L+E%3BRomaniello%2C+S+J%3BSouders%2C+A+K%3BWadhwa%2C+M%3BAnonymous&rft.aulast=Brennecka&rft.aufirst=G&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/1813.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 - 18 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Apr. 11, 2016 N1 - Last updated - 2017-01-05 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Allende Meteorite; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; CV chondrites; early solar system; ICP mass spectra; inclusions; isotopes; mass spectra; metals; meteorites; nucleosynthesis; r-process; radioactive isotopes; short-lived isotopes; Sn-126; spectra; stars; stony meteorites; supernovas; tellurium; tin; volatile elements ER - TY - JOUR T1 - Parametric studies of the effect of bolides impacts on Earth or their near-surface airbursts on cratering AN - 1855318223; 2017-000742 JF - Annual Meeting of the Meteoritical Society AU - Ezzedine, S M AU - Miller, P L AU - Dearborn, D S P AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 5393 PB - Meteoritical Society, [varies] VL - 78 SN - 0735-049X, 0735-049X KW - cratering KW - shock waves KW - Earth KW - numerical models KW - shorelines KW - bolides KW - impacts KW - simulation KW - airbursts KW - meteors KW - meteorites KW - scale models KW - sensitivity analysis KW - ocean waves KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855318223?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Parametric+studies+of+the+effect+of+bolides+impacts+on+Earth+or+their+near-surface+airbursts+on+cratering&rft.au=Ezzedine%2C+S+M%3BMiller%2C+P+L%3BDearborn%2C+D+S+P%3BAnonymous&rft.aulast=Ezzedine&rft.aufirst=S&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/5393.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 - 6 N1 - SuppNotes - Accessed on Aug. 25, 2016 N1 - Last updated - 2017-01-05 N1 - SubjectsTermNotLitGenreText - airbursts; bolides; cratering; Earth; impacts; meteorites; meteors; numerical models; ocean waves; scale models; sensitivity analysis; shock waves; shorelines; simulation ER - TY - JOUR T1 - Meteorite material properties for use in impulsive asteroid deflection simulations AN - 1855317982; 2017-000688 JF - Annual Meeting of the Meteoritical Society AU - Bruck Syal, M AU - Chen, L AU - Herbold, E B AU - Owen, J M AU - Swift, D AU - Miller, P L AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 5282 PB - Meteoritical Society, [varies] VL - 78 SN - 0735-049X, 0735-049X KW - experimental studies KW - numerical models KW - density KW - asteroids KW - microstructure KW - tensile strength KW - simulation KW - porosity KW - temperature KW - meteorites KW - mitigation KW - yield strength KW - natural hazards KW - composition KW - uncertainty KW - regolith KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855317982?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Meteorite+material+properties+for+use+in+impulsive+asteroid+deflection+simulations&rft.au=Bruck+Syal%2C+M%3BChen%2C+L%3BHerbold%2C+E+B%3BOwen%2C+J+M%3BSwift%2C+D%3BMiller%2C+P+L%3BAnonymous&rft.aulast=Bruck+Syal&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/5282.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 - 6 N1 - SuppNotes - Accessed on Aug. 12, 2016 N1 - Last updated - 2017-01-05 N1 - SubjectsTermNotLitGenreText - asteroids; composition; density; experimental studies; meteorites; microstructure; mitigation; natural hazards; numerical models; porosity; regolith; simulation; temperature; tensile strength; uncertainty; yield strength ER - TY - JOUR T1 - Oxygen isotopes in microchondrules and fine grained rims; co-genetic origin of chondrules, micro-chondrules and rims in UOCs? AN - 1832726150; 2016-091267 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Jacobsen, B AU - Bigolski, J N AU - Dobrica, E AU - Weisberg, M K AU - Brearley, Adrian J AU - Hutcheon, I D AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2929 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - Northwest Africa Meteorites KW - ordinary chondrites KW - accretion KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - unequilibrated ordinary chondrites KW - isotope ratios KW - parent bodies KW - mass spectra KW - microchondrules KW - fine-grained rims KW - NWA 5717 KW - stable isotopes KW - meteorites KW - fine-grained materials KW - chondrules KW - NanoSIMS KW - spectra KW - chondrites KW - O-17/O-16 KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832726150?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Oxygen+isotopes+in+microchondrules+and+fine+grained+rims%3B+co-genetic+origin+of+chondrules%2C+micro-chondrules+and+rims+in+UOCs%3F&rft.au=Jacobsen%2C+B%3BBigolski%2C+J+N%3BDobrica%2C+E%3BWeisberg%2C+M+K%3BBrearley%2C+Adrian+J%3BHutcheon%2C+I+D%3BAnonymous&rft.aulast=Jacobsen&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 - http://www.hou.usra.edu/meetings/lpsc2015/pdf/2929.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 May 5, 2016 N1 - Last updated - 2016-10-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - accretion; chondrites; chondrules; fine-grained materials; fine-grained rims; ion probe data; isotope ratios; isotopes; mass spectra; meteorites; microchondrules; NanoSIMS; Northwest Africa Meteorites; NWA 5717; O-17/O-16; ordinary chondrites; oxygen; parent bodies; spectra; stable isotopes; stony meteorites; unequilibrated ordinary chondrites ER - TY - JOUR T1 - Late glacial and Holocene history of the Greenland ice sheet margin, Nunatarssuaq, northwestern Greenland AN - 1832723082; 2016-091570 AB - Delineating the late glacial and Holocene fluctuations of the Greenland Ice Sheet (GrIS), particularly during periods that were as warm as or warmer than present, provides a longer-term perspective on present ice margin fluctuations and can inform how the ice sheet may respond to future climate conditions. We focus on mapping and dating past GrIS extents in the Nunatarssuaq region of northwestern Greenland. In the summer of 2014, we conducted geomorphic mapping and collected rock samples for (super 10) Be surface exposure dating and subfossil plant samples for (super 14) C dating. We also obtained sediment cores from an ice-proximal lake. Preliminary (super 10) Be ages of boulders deposited during deglaciation of the GrIS subsequent to the Last Glacial Maximum (LGM) range from approximately 37-15 ka. The apparently older ages indicate the presence of (super 10) Be inherited from prior periods of exposure. The youngest age is interpreted as an approximate age of ice recession from the LGM, however further data are needed to test this hypothesis. Glacial landforms mapped near Nordso, a large proglacial lake, including grounding lines, moraines, paleo-shorelines, and deltas, indicate the existence of a higher lake level that resulted from a more extensive GrIS margin likely during Holocene time. (super 10) Be samples from these geomorphic features are being processed and analyzed. Subfossil plants exposed at the GrIS margin on shear planes date to approximately 4.6-4.8 cal. ka BP and in situ subfossil plants on a nunatak date to approximately 3.1 cal. ka BP. These ages indicate less extensive ice during middle Holocene time. Approximately 30-50 m outboard of the modern GrIS margin is a fresh drift limit characterized by unweathered, lichen-free clasts and is estimated to be late Holocene in age. Additional radiocarbon ages of subfossil plants exposed by recent retreat of the GrIS margin suggest that the GrIS was at or behind its present location at AD approximately 1650-1800 and approximately 1820-1890. Results thus far indicate that the GrIS margin in northwestern Greenland has responded sensitively to Holocene climate changes. Ongoing research will improve the chronological constraints on these fluctuations. JF - Abstracts with Programs - Geological Society of America AU - Farnsworth, Lauren AU - Kelly, Meredith A AU - Axford, Yarrow AU - Bromley, Gordon AU - Osterberg, Erich C AU - Howley, Jennifer A AU - Zimmerman, Susan H AU - Jackson, Margaret S AU - Lasher, G Everett AU - McFarlin, Jamie AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 713 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832723082?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Late+glacial+and+Holocene+history+of+the+Greenland+ice+sheet+margin%2C+Nunatarssuaq%2C+northwestern+Greenland&rft.au=Farnsworth%2C+Lauren%3BKelly%2C+Meredith+A%3BAxford%2C+Yarrow%3BBromley%2C+Gordon%3BOsterberg%2C+Erich+C%3BHowley%2C+Jennifer+A%3BZimmerman%2C+Susan+H%3BJackson%2C+Margaret+S%3BLasher%2C+G+Everett%3BMcFarlin%2C+Jamie%3BAnonymous&rft.aulast=Farnsworth&rft.aufirst=Lauren&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=713&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 - 2016-10-27 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Potential for high-precision age models for terrestrial climate archives using radiocarbon ages of pollen separated by flow cytometry AN - 1832722857; 2016-091601 AB - Documenting the existence, magnitude and direction of leads and lags in records of global and regional climate change is critical to understanding the behavior of Earth's climate system. In particular, Holocene climate changes have occurred under boundary conditions similar to the present (insolation, ice sheets, ocean/atmosphere circulation), and are well preserved in many terrestrial archives. However, the uncertainties in the ages of past changes from lake, wetland, and other environments are often at least 100 years, making it difficult to distinguish synchroneity and feedbacks between archives. This is often due to the lack of terrestrial macrofossils in climate-sensitive locations, such as high-alpine or dryland settings, and is also in part due to the need to calibrate radiocarbon ages to calendar years. Radiocarbon dating of pollen separates has long been attempted to improve the resolution of age models, but the difficulty of cleanly separating pollen from other kinds of organic carbon of different (or indeterminate) age has prevented its reliable use. Separation of pollen by flow cytometry holds the potential to provide high-precision and -accuracy age models, because the pollen can be separated completely and very efficiently. Here we report radiocarbon ages on pollen from a set of closely spaced samples from the Holocene sediments of Mono Lake, California, using flow cytometry to achieve pure separates. The accuracy of the pollen ages is tested using two well-dated tephras, the South Mono tephra (1300-1355 cal yr BP; Bursik & Sieh, 2013; USGS Data Series 758) and the North Mono-Inyo tephra (600 yr BP; Millar et al. 2006; QR v66 p273), that bracket the samples. This time period encompasses two regressive-transgressive cycles at Mono Lake, and includes the severe drought of the Medieval Climate Anomaly. The samples are spaced 1-2 cm apart, providing the opportunity to test superposition and increase the precision of the age model by matching the 14C ages to features of the IntCal13 calibration curve. If this approach works it will provide the potential for decadal-scale precision on the ages of paleoclimatic features. JF - Abstracts with Programs - Geological Society of America AU - Zimmerman, Susan Herrgesell AU - Brown, Tom AU - Hemming, Sidney AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 846 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832722857?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Potential+for+high-precision+age+models+for+terrestrial+climate+archives+using+radiocarbon+ages+of+pollen+separated+by+flow+cytometry&rft.au=Zimmerman%2C+Susan+Herrgesell%3BBrown%2C+Tom%3BHemming%2C+Sidney%3BAnonymous&rft.aulast=Zimmerman&rft.aufirst=Susan&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=846&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 - 2016-10-27 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - A meteorite perespective on planetary defense AN - 1832652376; 726463-47 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Sears, Derek W G AU - Lee, Timothy J AU - Dotson, Jesse AU - Syal, Megan Bruck AU - Swift, Damian C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1608 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - fusion crust KW - fragmentation KW - breccia KW - ablation KW - impact features KW - asteroids KW - atmosphere KW - shape KW - meteorite falls KW - size KW - light curves KW - mass KW - meteorites KW - physical properties KW - mitigation KW - detection KW - fragments KW - natural hazards KW - chemical properties KW - impact craters KW - regolith KW - chelyabinsk Meteorite KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832652376?accountid=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+meteorite+perespective+on+planetary+defense&rft.au=Sears%2C+Derek+W+G%3BLee%2C+Timothy+J%3BDotson%2C+Jesse%3BSyal%2C+Megan+Bruck%3BSwift%2C+Damian+C%3BAnonymous&rft.aulast=Sears&rft.aufirst=Derek+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/1608.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 - 17 N1 - PubXState - TX N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - ablation; asteroids; atmosphere; breccia; chelyabinsk Meteorite; chemical properties; detection; fragmentation; fragments; fusion crust; impact craters; impact features; light curves; mass; meteorite falls; meteorites; mitigation; natural hazards; physical properties; regolith; shape; size ER - TY - JOUR T1 - (super 40) Ar/ (super 39) Ar systematics of shergottite NWA 4468 AN - 1832645152; 724350-46 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Cassata, W S AU - Borg, L E AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2742 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - NWA 4468 KW - Northwest Africa Meteorites KW - Ar/Ar KW - stony meteorites KW - isotopes KW - Martian meteorites KW - isotope ratios KW - isochrons KW - achondrites KW - stable isotopes KW - argon KW - SNC Meteorites KW - meteorites KW - radioactive isotopes KW - Ar-40/Ar-36 KW - shergottite KW - dates KW - noble gases KW - Ar-38/Ar-36 KW - absolute age KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832645152?accountid=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=%28super+40%29+Ar%2F+%28super+39%29+Ar+systematics+of+shergottite+NWA+4468&rft.au=Cassata%2C+W+S%3BBorg%2C+L+E%3BAnonymous&rft.aulast=Cassata&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/2742.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 - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; Ar-38/Ar-36; Ar-40/Ar-36; Ar/Ar; argon; dates; isochrons; isotope ratios; isotopes; Martian meteorites; meteorites; noble gases; Northwest Africa Meteorites; NWA 4468; radioactive isotopes; shergottite; SNC Meteorites; stable isotopes; stony meteorites ER - TY - JOUR T1 - Neodymium and tungsten isotope systematics of Mars inferred from the augite basaltic meteorite NWA 8159 AN - 1832642053; 724350-39 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Kayzar, T M AU - Borg, L AU - Kruijer, T S AU - Kleine, T AU - Brennecka, G AU - Agee, C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2357 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - Northwest Africa Meteorites KW - stony meteorites KW - isotopes KW - Martian meteorites KW - mantle KW - Mars KW - stable isotopes KW - meteorites KW - radioactive isotopes KW - tungsten KW - Sm-147/Nd-144 KW - dates KW - absolute age KW - samarium KW - rare earths KW - heterogeneity KW - isotope ratios KW - W-182 KW - isochrons KW - NWA 8159 KW - achondrites KW - terrestrial planets KW - Nd-144/Nd-143 KW - planets KW - Nd-144/Nd-142 KW - Nd/Nd KW - Sm/Nd KW - metals KW - neodymium KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832642053?accountid=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=Neodymium+and+tungsten+isotope+systematics+of+Mars+inferred+from+the+augite+basaltic+meteorite+NWA+8159&rft.au=Kayzar%2C+T+M%3BBorg%2C+L%3BKruijer%2C+T+S%3BKleine%2C+T%3BBrennecka%2C+G%3BAgee%2C+C%3BAnonymous&rft.aulast=Kayzar&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/2357.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 - 13 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; dates; heterogeneity; isochrons; isotope ratios; isotopes; mantle; Mars; Martian meteorites; metals; meteorites; Nd-144/Nd-142; Nd-144/Nd-143; Nd/Nd; neodymium; Northwest Africa Meteorites; NWA 8159; planets; radioactive isotopes; rare earths; samarium; Sm-147/Nd-144; Sm/Nd; stable isotopes; stony meteorites; terrestrial planets; tungsten; W-182 ER - TY - JOUR T1 - High-precision (super 182) W measurements of Martian meteorites for constraining the early evolution of Mars AN - 1832641772; 724350-38 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Kruijer, Thomas S AU - Kleine, T AU - Borg, L AU - Fischer-Goedde, M AU - Irving, A J AU - Bischoff, A AU - Agee, C B AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1928 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - NWA 4468 KW - Northwest Africa Meteorites KW - stony meteorites KW - isotopes KW - Martian meteorites KW - mass spectra KW - mantle KW - Mars KW - stable isotopes KW - SNC Meteorites KW - meteorites KW - tungsten KW - NWA 7034 KW - spectra KW - heterogeneity KW - precision KW - Hf/W KW - W-182 KW - achondrites KW - terrestrial planets KW - ICP mass spectra KW - planets KW - shergottite KW - metals KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832641772?accountid=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=High-precision+%28super+182%29+W+measurements+of+Martian+meteorites+for+constraining+the+early+evolution+of+Mars&rft.au=Kruijer%2C+Thomas+S%3BKleine%2C+T%3BBorg%2C+L%3BFischer-Goedde%2C+M%3BIrving%2C+A+J%3BBischoff%2C+A%3BAgee%2C+C+B%3BAnonymous&rft.aulast=Kruijer&rft.aufirst=Thomas&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/1928.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 - 16 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - achondrites; heterogeneity; Hf/W; ICP mass spectra; isotopes; mantle; Mars; Martian meteorites; mass spectra; metals; meteorites; Northwest Africa Meteorites; NWA 4468; NWA 7034; planets; precision; shergottite; SNC Meteorites; spectra; stable isotopes; stony meteorites; terrestrial planets; tungsten; W-182 ER - TY - JOUR T1 - Nuclear and kinetic approaches to asteroid defense; new numerical insights AN - 1832638637; 726463-43 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Syal, M Bruck AU - Owen, J M AU - Miller, P L AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1673 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - smoothed particle hydrodynamics KW - shape model KW - shock waves KW - fragmentation KW - numerical models KW - asteroids KW - explosions KW - damage KW - impacts KW - three dimentional models KW - porosity KW - mass KW - mitigation KW - safety KW - nuclear energy KW - comets KW - deflection KW - natural hazards KW - velocity KW - nuclear explosions KW - spherical models KW - kinetics KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832638637?accountid=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=Nuclear+and+kinetic+approaches+to+asteroid+defense%3B+new+numerical+insights&rft.au=Syal%2C+M+Bruck%3BOwen%2C+J+M%3BMiller%2C+P+L%3BAnonymous&rft.aulast=Syal&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/1673.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 - 13 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - asteroids; comets; damage; deflection; explosions; fragmentation; impacts; kinetics; mass; mitigation; natural hazards; nuclear energy; nuclear explosions; numerical models; porosity; safety; shape model; shock waves; smoothed particle hydrodynamics; spherical models; three dimentional models; velocity ER - TY - JOUR T1 - Samarium-neodymium chronology of an Allende type A CAI AlNO 1-16 AN - 1832635204; 724348-35 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Marks, N E AU - Borg, L E AU - Hutcheon, I D AU - Jacobsen, B AU - Clayton, R N AU - Mayeda, T K AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - abstract 2793.pdf PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832635204?accountid=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=Samarium-neodymium+chronology+of+an+Allende+type+A+CAI+AlNO+1-16&rft.au=Marks%2C+N+E%3BBorg%2C+L+E%3BHutcheon%2C+I+D%3BJacobsen%2C+B%3BClayton%2C+R+N%3BMayeda%2C+T+K%3BAnonymous&rft.aulast=Marks&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 - 9 N1 - PubXState - TX N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 ER - TY - JOUR T1 - Impact delivery of water at the Moon and Mercury AN - 1819894982; 2016-077752 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Bruck Syal, Megan AU - Schultz, P H AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1680 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - water KW - density KW - asteroids KW - Moon KW - impacts KW - porosity KW - terrestrial planets KW - planets KW - micrometeorites KW - meteorites KW - comets KW - transport KW - ice KW - Mercury Planet KW - steady-state processes KW - velocity KW - algorithms KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894982?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Impact+delivery+of+water+at+the+Moon+and+Mercury&rft.au=Bruck+Syal%2C+Megan%3BSchultz%2C+P+H%3BAnonymous&rft.aulast=Bruck+Syal&rft.aufirst=Megan&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/1680.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. incl. 1 table N1 - SuppNotes - Accessed on Jan. 20, 2016 N1 - Last updated - 2016-09-16 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - algorithms; asteroids; comets; density; ice; impacts; Mercury Planet; meteorites; micrometeorites; Moon; planets; porosity; regolith; steady-state processes; terrestrial planets; transport; velocity; water ER - TY - JOUR T1 - Preservation of cometary and asteroidal volatiles in impact melt; an overlooked reservoir for hollow formation on Mercury AN - 1807505827; 2016-065882 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Harris, R S AU - Schultz, P H AU - Bruck Syal, M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2585 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - water KW - cratering KW - experimental studies KW - impactites KW - asteroids KW - water vapor KW - impacts KW - ejecta KW - melts KW - cold traps KW - terrestrial planets KW - planets KW - impact melts KW - volatiles KW - comets KW - hypervelocity impacts KW - metamorphic rocks KW - Mercury Planet KW - hollows KW - depressions KW - MESSENGER Mission KW - preservation KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807505827?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Preservation+of+cometary+and+asteroidal+volatiles+in+impact+melt%3B+an+overlooked+reservoir+for+hollow+formation+on+Mercury&rft.au=Harris%2C+R+S%3BSchultz%2C+P+H%3BBruck+Syal%2C+M%3BAnonymous&rft.aulast=Harris&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/2585.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. N1 - SuppNotes - Accessed on Mar. 16, 2016 N1 - Last updated - 2016-10-25 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - asteroids; cold traps; comets; cratering; depressions; ejecta; experimental studies; hollows; hypervelocity impacts; impact melts; impactites; impacts; melts; Mercury Planet; MESSENGER Mission; metamorphic rocks; planets; preservation; terrestrial planets; volatiles; water; water vapor ER - TY - JOUR T1 - Chronological persistence of Acropora cervicornis at Coral Gardens, Belize AN - 1807504688; 2016-064113 AB - Acropora cervicornis (staghorn coral) is an important framework-building scleractinian coral that dominated many Caribbean reefs throughout the Pleistocene and Holocene. Acropora spp. suffered collapse throughout the Caribbean since the 1980s as a result of white band disease and other stressors. Despite widespread decline, large populations of Acropora spp. are currently thriving at Coral Gardens Reef, Belize, south of Ambergris Caye where live coral cover is as high as 50% in some areas. This project aims to discern whether these populations were established after the Caribbean acroporid collapse or whether they are remnant populations from before the 1980s. To determine the timing of Acropora spp. dominance at Coral Gardens, pristine aragonite material was sampled from dead coral skeletons excavated from stratigraphic "pits" in the coral death assemblage at two underwater sites. Stratigraphic Section One extended approximately 1.2 meters beneath the surface of the reef and Stratigraphic Section Two extended approximately 2 meters. Seventeen and 12 aragonite samples were extracted from Sections One and Two respectively, and aged using conventional radiocarbon dating techniques. Radiocarbon results from both sites indicate that A. cervicornis growth was initiated prior to the well-documented spike in atmospheric radiocarbon caused by nuclear weapons testing (late 1950s) and persisted throughout the mid-1960s. However, due to the lack of high resolution post-bomb radiocarbon calibration data for marine reservoir effects near Belize, additional dating techniques were needed to resolve the age of the more recent A. cervicornis corals. We obtained very precise ages utilizing U-Th dating to better constrain the chronological persistence of A. cervicornis at Coral Gardens. The (super 230) Th age data suggest that some of the A. cervicornis colonies in Coral Gardens survived the wide-spread 1980s Caribbean acroporid coral collapse and that corals from beneath the living A. cervicornis canopy are synchronous with those taken from the surface of Stratigraphic Section Two. The results suggest some degree of continuity in reef growth at this site amidst greater Caribbean collapse of Acropora spp. JF - Abstracts with Programs - Geological Society of America AU - Waggoner, Tanner AU - Greer, Lisa AU - Guilderson, Thomas P AU - Clark, Tara AU - Busch, James AU - Biegel, Jenna AU - Lustig, Harry, III AU - Curran, H Allen AU - Lescinsky, Halard L AU - Wirth, Karl AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 642 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/1807504688?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Chronological+persistence+of+Acropora+cervicornis+at+Coral+Gardens%2C+Belize&rft.au=Waggoner%2C+Tanner%3BGreer%2C+Lisa%3BGuilderson%2C+Thomas+P%3BClark%2C+Tara%3BBusch%2C+James%3BBiegel%2C+Jenna%3BLustig%2C+Harry%2C+III%3BCurran%2C+H+Allen%3BLescinsky%2C+Halard+L%3BWirth%2C+Karl%3BAnonymous&rft.aulast=Waggoner&rft.aufirst=Tanner&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=642&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 - 2016-07-29 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Trace element budget along a section of fast-spread oceanic crust; results from drilling at the Hess Deep Rift (ODP Leg 147 and IODP Expedition 345) AN - 1803779269; 2016-062052 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Godard, M AU - Falloon, T AU - Gillis, K AU - Akizawa, N AU - Koepke, J AU - Marks, N AU - Saha, A AU - Garbe-Schoenberg, D AU - Meyer, R AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 1061 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - oceanic crust KW - volcanic rocks KW - Northeast Pacific KW - igneous rocks KW - olivine gabbro KW - gabbronorite KW - ODP Site 894 KW - plutonic rocks KW - major elements KW - IODP Site U1415 KW - basalts KW - trace elements KW - geochemistry KW - East Pacific KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - troctolite KW - North Pacific KW - Pacific Ocean KW - mid-ocean ridge basalts KW - Hess Deep KW - Expedition 345 KW - Ocean Drilling Program KW - gabbros KW - Leg 147 KW - crust KW - 18:Solid-earth geophysics 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/1803779269?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Trace+element+budget+along+a+section+of+fast-spread+oceanic+crust%3B+results+from+drilling+at+the+Hess+Deep+Rift+%28ODP+Leg+147+and+IODP+Expedition+345%29&rft.au=Godard%2C+M%3BFalloon%2C+T%3BGillis%2C+K%3BAkizawa%2C+N%3BKoepke%2C+J%3BMarks%2C+N%3BSaha%2C+A%3BGarbe-Schoenberg%2C+D%3BMeyer%2C+R%3BAnonymous&rft.aulast=Godard&rft.aufirst=M&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=1061&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/1061.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 - 2016-10-25 N1 - SubjectsTermNotLitGenreText - basalts; crust; East Pacific; Equatorial Pacific; Expedition 345; gabbronorite; gabbros; geochemistry; Hess Deep; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1415; Leg 147; major elements; mid-ocean ridge basalts; North Pacific; Northeast Pacific; Ocean Drilling Program; oceanic crust; ODP Site 894; olivine gabbro; Pacific Ocean; plutonic rocks; trace elements; troctolite; volcanic rocks ER - TY - JOUR T1 - Geochemical climate proxy development in tufa from the Mono Basin, California AN - 1803773975; 2016-062366 AB - We are interested in the climatic evolution of Mono Lake reflected in changing lake conditions, for instance lake level and pH. There are a restricted number of tools to interpret these changes, in particular in the ancient lake (>10 ka). This research is part of ongoing studies aimed at evaluating the viability of new geochemical proxies in terrestrial systems. This study had two primary goals: to evaluate geochemical retentivity of different textural varieties of carbonate precipitates (tufa) through the analysis of young, well-characterized samples; and to apply those proxies to dated ancient tufas to evaluate paleolake conditions. A collection of tufa samples reflecting distinct textural attributes was examined; these broadly break down into dense forms, commonly laminated, and those which are more texturally heterogeneous, generally spongy. Total lanthanoid rare Earth element (REE) concentrations of densely laminated forms of tufa are higher (>20 ppm) and more homogeneous than spongy morphologies (mainly <10 ppm). Carbonate-associated sulfate from a preliminary subset of samples behave as predicted, with elevated CAS in samples with low total REE. The densely laminated samples also have restricted stable (C, O) isotopic variability compared to the spongy forms. The data from the former textural variety are consistent with retention of undisturbed elemental systematics. The use of texture-specific samples was applied to dated layers from an ancient tufa mound ranging over 25 kyr. The samples show a factor of 1.6 variation in total REE concentration. The initial group of samples show a modest negative correlation between REE total and the magnitude of Ce anomaly, from samples with high REE and negative anomalies (Ce/Ce*=0.6) to those with lower total REE and slightly positive anomalies (Ce/Ce*=1.1). Decrease in the total REE (as well as Ba content) follows the c. 40 ka rise in lake level. JF - Abstracts with Programs - Geological Society of America AU - Miller, Martha AU - Tomascak, Paul B AU - Hemming, Sidney R AU - LeRoy, Sverre L AU - Stine, Scott AU - Zimmerman, Susan H AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 665 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803773975?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geochemical+climate+proxy+development+in+tufa+from+the+Mono+Basin%2C+California&rft.au=Miller%2C+Martha%3BTomascak%2C+Paul+B%3BHemming%2C+Sidney+R%3BLeRoy%2C+Sverre+L%3BStine%2C+Scott%3BZimmerman%2C+Susan+H%3BAnonymous&rft.aulast=Miller&rft.aufirst=Martha&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=665&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 - 2016-07-14 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Regolith-stripping at the Plio-Pleistocene transition; evolution of the Klondike Placer AN - 1800395131; 2016-057738 AB - We have performed an experiment removed from complications of direct glacierization, high relief, and rapid rock uplift, and with temporal and paleoclimate control to test the hypothesis that hillslope erosion rates increased at the onset of late Pliocene-Pleistocene glaciation. The Klondike Placer District, Yukon encompasses the auriferous variably altered and quartz-veined Paleozoic chlorite-muscovite-feldspar Klondike Schist. Erosion of regolith in this schist through the late Miocene and Pliocene produced extensive placer deposits associated with the White Channel Gravel, which is exposed within modern drainages. The Gravel is composed of light grey to white leached and unleached braided stream sediments with a high abundance of angular milky-white quartz cobbles and pebbles, sourced from quartz veins within the Klondike Schist. Toward the upper part of the White Channel gravel, syn-depositional ice-wedge casts record cooling and appearance of permafrost during deposition of the Upper White Channel (UWC) Gravel. The uppermost UWC Gravel interbeds with the earliest Cordilleran outwash (Klondike Gravel) in the lowermost valley reaches. The (super 26) Al/ (super 10) Be burial age of the UWC Gravel (2.64+ or -0.20 Ma, 1sigma) is consistent with late Gauss Chron normal polarity and associated glass fission-track ages on volcanic glass. Concentrations of (super 10) Be and (super 26) Al (150-850 um sand fraction) are corrected for decay, and post-deposition erosion and production, to calculate the depositional concentrations and the up-section variation in paleo-erosion rate. The (super 26) Al/ (super 10) Be are relatively constant (2.0 to 2.6 n=8) for all except the deepest sample at the base of the Lower White Channel (LWC) Gravel (ratio=1.4). This suggests that the top of the LWC and the UWC gravel were buried over a relatively short period without significant variations in sediment storage. The mean paleo-erosion rate during the deposition of the UWC gravel is 3.7+ or -0.1 cm/ka. If the depositional age of the LWC gravel is early Pliocene (based on available data), the catchment paleo-erosion rate during deposition of the top of the LWC was relatively slower, indicating an increase in erosion to strip the mid-Pliocene regolith and deposit the gold-bearing quartz-rich UWC Gravel during the Plio-Pleistocene transition. JF - Abstracts with Programs - Geological Society of America AU - Gosse, John AU - Hidy, Alan J AU - Froese, Duane AU - Bond, Jeffrey D AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 614 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 03:Geochronology KW - 27A:Economic geology, geology of ore deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800395131?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Regolith-stripping+at+the+Plio-Pleistocene+transition%3B+evolution+of+the+Klondike+Placer&rft.au=Gosse%2C+John%3BHidy%2C+Alan+J%3BFroese%2C+Duane%3BBond%2C+Jeffrey+D%3BAnonymous&rft.aulast=Gosse&rft.aufirst=John&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=614&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 - Carbon transformations in the rhizosphere; the critical role of microbial functional capacity AN - 1800394088; 2016-055149 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Pett-Ridge, Jennifer AU - Shi, Shengjing AU - Nuccio, Erin AU - Herman, Donald J AU - He, Zhili AU - Wu, Liyou AU - Brodie, Eoin AU - Zhou, Jizhong AU - Firestone, Mary K AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 2477 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - United States KW - soils KW - Avena fatua KW - ion probe data KW - matrix KW - mass spectra KW - rhizosphere KW - geochemical cycle KW - grasses KW - California KW - organic compounds KW - carbon KW - spectra KW - carbon cycle KW - microorganisms KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800394088?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Carbon+transformations+in+the+rhizosphere%3B+the+critical+role+of+microbial+functional+capacity&rft.au=Pett-Ridge%2C+Jennifer%3BShi%2C+Shengjing%3BNuccio%2C+Erin%3BHerman%2C+Donald+J%3BHe%2C+Zhili%3BWu%2C+Liyou%3BBrodie%2C+Eoin%3BZhou%2C+Jizhong%3BFirestone%2C+Mary+K%3BAnonymous&rft.aulast=Pett-Ridge&rft.aufirst=Jennifer&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=2477&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/2477.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 - 2016-06-30 N1 - SubjectsTermNotLitGenreText - Avena fatua; California; carbon; carbon cycle; geochemical cycle; grasses; ion probe data; mass spectra; matrix; microorganisms; organic compounds; rhizosphere; soils; spectra; United States ER - TY - JOUR T1 - Three historic ground rupturing earthquakes in the Santa Cruz Mountains, San Andreas Fault; refining age estimates with (super 14) C wiggle-matching and early historic reports AN - 1797536815; 2016-050601 AB - The Hazel Dell paleoseismic site on the Santa Cruz Mountains section of the San Andreas Fault provides the first definitive paleoseismic evidence of two pre-1906 19 (super th) century surface rupturing earthquakes. Historical records note moderate to large earthquakes that caused widespread damage in the region in 1836, 1838, 1865 and 1890, however it was not previously known with any certainty on which Bay Area faults these earthquakes occurred. Trenches at the Hazel Dell site revealed fine-grained interbedded sand and silt above a buried soil that is faulted in the most recent event, 1906, and in two earlier earthquakes. We discovered hundreds of pieces of cut redwood chips along with buried redwood tree stumps within the buried soil, the ante-penultimate (E3) earthquake surface. This demonstrates that the trees at the site were cut down shortly before earthquake E3. There are no known ethnographic or historical accounts of pre-contact native people chopping down large trees in the way that European colonists would have, and so earthquake E3 must be historic. The first record of European land use was for pasture in 1803, and the property became a Spanish land grant in 1827, soon after which a whip-saw lumber mill was established in the upper Corralitos area. We corroborate the historic record of logging in the area by determining the felling date of a buried redwood tree stump at the site along with estimating the age of the woodchips using radiocarbon dating and tree ring wiggle matching. Based on 14 radiocarbon dates sampled from annual growth rings taken from the stump, we find a best fit date of 1789 - 1797 for the outer growth ring; a maximum limited age for the felling of the trees. We also wiggle match 2 radiocarbon dates from inner and outer growth rings from two wood chips (with bark); their age is consistent with the tree. Together, these paleoseismic results and historical earthquake accounts for the area lead us to conclude that the San Andreas Fault ruptured in 1838, 1890 and 1906. Earthquakes in 1836 and 1865 likely did not generate rupture on the SAF. We also correlate earthquakes between Hazel Dell and nearby paleoseismic sites based on revised timing, similarity of stratigraphy and style and size of displacement, and build a composite paleoseismic record with estimated rupture length and magnitude for these Santa Cruz Mountains events. JF - Abstracts with Programs - Geological Society of America AU - Streig, Ashley AU - Dawson, Timothy AU - Weldon, Ray J, II AU - Gavin, Daniel AU - Guilderson, Tom AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 813 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797536815?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+historic+ground+rupturing+earthquakes+in+the+Santa+Cruz+Mountains%2C+San+Andreas+Fault%3B+refining+age+estimates+with+%28super+14%29+C+wiggle-matching+and+early+historic+reports&rft.au=Streig%2C+Ashley%3BDawson%2C+Timothy%3BWeldon%2C+Ray+J%2C+II%3BGavin%2C+Daniel%3BGuilderson%2C+Tom%3BAnonymous&rft.aulast=Streig&rft.aufirst=Ashley&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=813&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 - 2016-06-17 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Plutonium desorption from montmorillonite; the role of redox transformations AN - 1797534771; 2016-052854 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Zavarin, Mavrik AU - Begg, James D AU - Kersting, Annie B AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 3566 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - silicates KW - experimental studies KW - desorption KW - colloidal materials KW - neptunium KW - numerical models KW - goethite KW - pollutants KW - plutonium KW - oxidation KW - pollution KW - adsorption KW - clay minerals KW - transport KW - time factor KW - metals KW - oxides KW - sheet silicates KW - transformations KW - actinides KW - mineral surface KW - Eh KW - montmorillonite KW - 01B:Mineralogy of silicates KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797534771?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Plutonium+desorption+from+montmorillonite%3B+the+role+of+redox+transformations&rft.au=Zavarin%2C+Mavrik%3BBegg%2C+James+D%3BKersting%2C+Annie+B%3BAnonymous&rft.aulast=Zavarin&rft.aufirst=Mavrik&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=3566&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/3566.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 - 6 N1 - Last updated - 2016-06-17 N1 - SubjectsTermNotLitGenreText - actinides; adsorption; clay minerals; colloidal materials; desorption; Eh; experimental studies; goethite; metals; mineral surface; montmorillonite; neptunium; numerical models; oxidation; oxides; plutonium; pollutants; pollution; sheet silicates; silicates; time factor; transformations; transport ER - TY - JOUR T1 - High-temperature kinetics of chlorite, biotite and illite AN - 1797532362; 2016-050141 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Smith, Megan M AU - Carroll, Susan A AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 2927 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - silicates KW - asperities KW - mineral-water interface KW - fluid phase KW - illite KW - solution KW - temperature KW - chlorite KW - fractures KW - geothermal reservoirs KW - chemical reactions KW - water-rock interaction KW - saturation KW - mica group KW - biotite KW - sheet silicates KW - chlorite group KW - kinetics KW - geochemistry KW - pH KW - high temperature KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797532362?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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-temperature+kinetics+of+chlorite%2C+biotite+and+illite&rft.au=Smith%2C+Megan+M%3BCarroll%2C+Susan+A%3BAnonymous&rft.aulast=Smith&rft.aufirst=Megan&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=2927&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/2927.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 - asperities; biotite; chemical reactions; chlorite; chlorite group; fluid phase; fractures; geochemistry; geothermal reservoirs; high temperature; illite; kinetics; mica group; mineral-water interface; pH; saturation; sheet silicates; silicates; solution; temperature; water-rock interaction ER - TY - JOUR T1 - Actinide pyrochlores; fabrication and new structural insights AN - 1793208151; 2016-048551 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Finkeldei, S AU - Brandt, F AU - Stennett, M AU - Holliday, K S AU - Hyatt, N AU - Bosbach, D AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 904 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - halides KW - fluorides KW - plutonium KW - crystal structure KW - curium KW - radioactive waste KW - laboratory studies KW - pyrochlore KW - oxides KW - spectra KW - rare earths KW - europium KW - synthesis KW - ceramic materials KW - fluorite KW - experimental studies KW - electron microscopy data KW - defects KW - X-ray spectra KW - EDS spectra KW - metals KW - niobates KW - EXAFS data KW - waste disposal KW - actinides KW - SEM data KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793208151?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Actinide+pyrochlores%3B+fabrication+and+new+structural+insights&rft.au=Finkeldei%2C+S%3BBrandt%2C+F%3BStennett%2C+M%3BHolliday%2C+K+S%3BHyatt%2C+N%3BBosbach%2C+D%3BAnonymous&rft.aulast=Finkeldei&rft.aufirst=S&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=904&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/904.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 - 2016-06-02 N1 - SubjectsTermNotLitGenreText - actinides; ceramic materials; crystal structure; curium; defects; EDS spectra; electron microscopy data; europium; EXAFS data; experimental studies; fluorides; fluorite; halides; laboratory studies; metals; niobates; oxides; plutonium; pyrochlore; radioactive waste; rare earths; SEM data; spectra; synthesis; waste disposal; X-ray spectra ER - TY - JOUR T1 - Reuse and recycling; resource allocation by cyanobacteria in microbial mats AN - 1793207321; 2016-046109 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Stuart, Rhona K AU - Mayali, X AU - Lee, J Z AU - Everroad, R C AU - Lipton, M AU - Boaro, A AU - Bebout, B M AU - Pett-Ridge, J AU - Weber, P K AU - Thelen, M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 3012 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - United States KW - cyanobacteria KW - extracellular polymeric substances KW - biogenic structures KW - biochemistry KW - matrix KW - mass spectra KW - microbial mats KW - bioavailability KW - nitrogen KW - geochemical cycle KW - adaptation KW - California KW - organic compounds KW - Monterey Bay KW - carbon KW - Elkhorn Slough KW - composition KW - spectra KW - carbon cycle KW - sedimentary structures KW - proteins KW - hypersaline environment KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207321?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reuse+and+recycling%3B+resource+allocation+by+cyanobacteria+in+microbial+mats&rft.au=Stuart%2C+Rhona+K%3BMayali%2C+X%3BLee%2C+J+Z%3BEverroad%2C+R+C%3BLipton%2C+M%3BBoaro%2C+A%3BBebout%2C+B+M%3BPett-Ridge%2C+J%3BWeber%2C+P+K%3BThelen%2C+M%3BAnonymous&rft.aulast=Stuart&rft.aufirst=Rhona&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=3012&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/3012.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 - 2016-06-02 N1 - SubjectsTermNotLitGenreText - adaptation; bioavailability; biochemistry; biogenic structures; California; carbon; carbon cycle; composition; cyanobacteria; Elkhorn Slough; extracellular polymeric substances; geochemical cycle; hypersaline environment; mass spectra; matrix; microbial mats; Monterey Bay; nitrogen; organic compounds; proteins; sedimentary structures; spectra; United States ER - TY - JOUR T1 - Water uranium isotope systematics in the Mono Basin AN - 1789751309; 2016-043910 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Lin, Ke AU - Wang, Xianfeng AU - Stine, Scott W AU - Hemming, Sidney R AU - Hemming, N Gary AU - Ali, Guleed A H AU - Zimmerman, Susan R H AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 1864 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - United States KW - southwestern Great Basin KW - Basin and Range Province KW - isotopes KW - U-234/Th-230 KW - California KW - controls KW - radioactive isotopes KW - springs KW - geochemistry KW - water KW - hydrology KW - North America KW - Mono Basin KW - Mono County California KW - isotope ratios KW - Great Basin KW - surface water KW - hydrochemistry KW - thermal waters KW - limnology KW - metals KW - U-234 KW - thorium KW - uranium KW - U-238 KW - actinides KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789751309?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Water+uranium+isotope+systematics+in+the+Mono+Basin&rft.au=Lin%2C+Ke%3BWang%2C+Xianfeng%3BStine%2C+Scott+W%3BHemming%2C+Sidney+R%3BHemming%2C+N+Gary%3BAli%2C+Guleed+A+H%3BZimmerman%2C+Susan+R+H%3BAnonymous&rft.aulast=Lin&rft.aufirst=Ke&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=1864&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/1864.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 - actinides; Basin and Range Province; California; controls; geochemistry; Great Basin; hydrochemistry; hydrology; isotope ratios; isotopes; limnology; metals; Mono Basin; Mono County California; North America; radioactive isotopes; southwestern Great Basin; springs; surface water; thermal waters; thorium; U-234; U-234/Th-230; U-238; United States; uranium; water ER - TY - JOUR T1 - Stable association? The influence of mineralogy, microbiology and plant growth on the fate of soil carbon AN - 1789748257; 2016-042051 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Neurath, Rachel AU - Whitman, Thea AU - Nico, Peter AU - Pett-Ridge, Jennifer AU - Firestone, Mary AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 2260 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - soils KW - silicates KW - Plantae KW - isotopes KW - geomicrobiology KW - kaolinite KW - ferrihydrite KW - stable isotopes KW - NMR spectra KW - infrared spectra KW - clay minerals KW - carbon dioxide KW - FTIR spectra KW - organic compounds KW - nucleic acids KW - carbon KW - DNA KW - oxides KW - sheet silicates KW - C-13 KW - spectra KW - growth KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789748257?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+association%3F+The+influence+of+mineralogy%2C+microbiology+and+plant+growth+on+the+fate+of+soil+carbon&rft.au=Neurath%2C+Rachel%3BWhitman%2C+Thea%3BNico%2C+Peter%3BPett-Ridge%2C+Jennifer%3BFirestone%2C+Mary%3BAnonymous&rft.aulast=Neurath&rft.aufirst=Rachel&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=2260&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/2260.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 - C-13; carbon; carbon dioxide; clay minerals; DNA; ferrihydrite; FTIR spectra; geomicrobiology; growth; infrared spectra; isotopes; kaolinite; NMR spectra; nucleic acids; organic compounds; oxides; Plantae; sheet silicates; silicates; soils; spectra; stable isotopes ER - TY - JOUR T1 - Surface processes associated with lunar swirls AN - 1784737066; 2016-035606 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Schultz, P H AU - Syal, M Bruck AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2438 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - lunar swirls KW - Reiner Gamma KW - patterns KW - maturity KW - Moon KW - Mandel'shtam F Crater KW - Goddard-A Crater KW - Lunar Reconnaissance Orbiter Camera KW - solar wind KW - impacts KW - magnetic field KW - terrestrial planets KW - brightness KW - planets KW - photometry KW - optical properties KW - Mercury Planet KW - surface features KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1784737066?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+processes+associated+with+lunar+swirls&rft.au=Schultz%2C+P+H%3BSyal%2C+M+Bruck%3BAnonymous&rft.aulast=Schultz&rft.aufirst=P&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/2438.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 Oct. 2, 2015 N1 - Last updated - 2016-04-28 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - brightness; Goddard-A Crater; impacts; Lunar Reconnaissance Orbiter Camera; lunar swirls; magnetic field; Mandel'shtam F Crater; maturity; Mercury Planet; Moon; optical properties; patterns; photometry; planets; Reiner Gamma; solar wind; surface features; terrestrial planets ER - TY - JOUR T1 - Wide span of exposure ages on Holocene moraines in the Sierra Nevada; process or climatic controls? AN - 1780803343; 2016-032845 AB - New high-precision (super 10) Be CRN exposure analyses of boulders from distal cirque moraines in the Sierra Nevada present a conundrum: although all moraines are geomorphically fresh and unstable (mapped as Matthes age), some show young ages (last 150-300 yrs; late Little Ice Age--LIA) consistent with previous studies of Neoglaciation in the range, whereas other moraines show a majority of ages thousands of years older than LIA. Matthes moraines below the Lyell Glacier (Yosemite NP) show exposure ages consistently between 150-300 yr before 2015, whereas similar moraines below the adjacent Maclure Glacier have exposure ages ranging from 1900-3900 yr old. Boulders on correlative Matthes moraines to the north below Price Peak (west Lake Tahoe) have exposure ages ranging from 1900-9900 yr old; no boulders analyzed so far on these northern moraines show LIA ages. The abundance of pre-LIA exposure ages on many of these moraines seemingly contradicts both historical photographic evidence as well as geomorphic and lake-sediment evidence, which indicate that the most extensive Holocene glaciation in the Sierra Nevada was during the late LIA. Some ages, such as those below the Maclure Glacier, may reflect slow-flow dynamics associated with debris-covered glaciers (rock glaciers). The older ages below Price Peak, however, are more difficult to reconcile with previous records, particularly those indicating absence of glaciers in the Sierra before approximately 3500 cal yr BP. Consistency of the exposure ages implies that inheritance from prior exposure is unlikely to explain all the ages. Other possible explanations include deposition related to protalus processes or to discrete events (e.g., earthquake-induced rockfall); conversely, the ages may indicate that Holocene glaciation in the range was more spatially and temporally heterogeneous than previously thought. Additional exposure ages from these moraines and others farther south may help resolve this conundrum. JF - Abstracts with Programs - Geological Society of America AU - Clark, Douglas H AU - Hidy, Alan J AU - Zimmerman, Susan H AU - Finkel, Robert C AU - Stock, Greg M AU - Schaefer, Joerg M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 488 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780803343?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Wide+span+of+exposure+ages+on+Holocene+moraines+in+the+Sierra+Nevada%3B+process+or+climatic+controls%3F&rft.au=Clark%2C+Douglas+H%3BHidy%2C+Alan+J%3BZimmerman%2C+Susan+H%3BFinkel%2C+Robert+C%3BStock%2C+Greg+M%3BSchaefer%2C+Joerg+M%3BAnonymous&rft.aulast=Clark&rft.aufirst=Douglas&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=488&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 - 2016-04-14 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - The Sm and Nd isotopic composition of chondrites and the Earth AN - 1780802267; 2016-032042 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Burkhardt, C AU - Borg, L E AU - Brennecka, G A AU - Dauphas, N AU - Kleine, T AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 429 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - alkaline earth metals KW - stony meteorites KW - isotopes KW - isotope ratios KW - stable isotopes KW - variations KW - Nd-144/Nd-143 KW - Sr-87/Sr-86 KW - meteorites KW - metals KW - rare earths KW - neodymium KW - chondrites KW - strontium KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780802267?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Sm+and+Nd+isotopic+composition+of+chondrites+and+the+Earth&rft.au=Burkhardt%2C+C%3BBorg%2C+L+E%3BBrennecka%2C+G+A%3BDauphas%2C+N%3BKleine%2C+T%3BAnonymous&rft.aulast=Burkhardt&rft.aufirst=C&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=429&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/429.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 - Number of references - 9 N1 - Last updated - 2016-04-14 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; chondrites; isotope ratios; isotopes; metals; meteorites; Nd-144/Nd-143; neodymium; rare earths; Sr-87/Sr-86; stable isotopes; stony meteorites; strontium; variations ER - TY - JOUR T1 - Using California's drought to quantify contributions to groundwater storage in high elevation meadows, Yosemite National Park AN - 1777469638; 2016-028018 AB - Scientific studies in high elevation meadows have focused on fluxes from snowmelt, streams, and hillslopes to support mountain meadows. Under normal hydrologic conditions these sources of water are the major contributors to groundwater storage in high elevations meadows. However, predicted of future climate scenarios suggest a reduction in snowpack and a shift to drier conditions. As a result of drier conditions, groundwater discharges from deep fractured bedrock sources, which are unaccounted for in current studies, are expected to be a larger percentage of the overall water balance. Using California's multi year drought we are able to start to quantify groundwater contributions to Tuolumne meadows in Yosemite National Park from these deep bedrock sources. Through the use of a suite of naturally occurring geochemical tracers, we are able to identify the locations of discharge from fractured bedrock sources and develop mixing models to quantify the volume-fractured bedrock sources contribute to meadows. In normal water years these signals are masked by much larger geochemical signals produced from spring snowmelt. As a result of the reduced snowpack, contributions from deep fractured bedrock flowpaths represent a higher fidelity signal, which was only detectable due to the current California drought. These results will provide new field observations to support future hydrologic modeling investigations of the impact of both multi year drought and climatic shifts in snowpack on groundwater availability in high elevation meadows. JF - Abstracts with Programs - Geological Society of America AU - Lowry, Christopher S AU - Vialpando, Marcelino AU - Visser, Ate AU - Esser, Bradley K AU - Moran, Jean E AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 473 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777469638?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Using+California%27s+drought+to+quantify+contributions+to+groundwater+storage+in+high+elevation+meadows%2C+Yosemite+National+Park&rft.au=Lowry%2C+Christopher+S%3BVialpando%2C+Marcelino%3BVisser%2C+Ate%3BEsser%2C+Bradley+K%3BMoran%2C+Jean+E%3BAnonymous&rft.aulast=Lowry&rft.aufirst=Christopher&rft.date=2015-01-01&rft.volume=47&rft.issue=7&rft.spage=473&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 - A renewed search for extant (super 126) Sn; Te isotopics of Allende CAIs obtained by HG-ICPMS AN - 1777468180; 2016-030157 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Brennecka, G A AU - Borg, L E AU - Romaniello, S J AU - Souders, A K AU - Wadhwa, M AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 385 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - precision KW - stony meteorites KW - isotopes KW - tellurium KW - calcium-aluminum inclusions KW - mass spectra KW - Sn-126 KW - carbonaceous chondrites KW - tin KW - CV chondrites KW - variations KW - Allende Meteorite KW - ICP mass spectra KW - meteorites KW - radioactive isotopes KW - metals KW - inclusions KW - Te-126 KW - spectra 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/1777468180?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+renewed+search+for+extant+%28super+126%29+Sn%3B+Te+isotopics+of+Allende+CAIs+obtained+by+HG-ICPMS&rft.au=Brennecka%2C+G+A%3BBorg%2C+L+E%3BRomaniello%2C+S+J%3BSouders%2C+A+K%3BWadhwa%2C+M%3BAnonymous&rft.aulast=Brennecka&rft.aufirst=G&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=385&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/385.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 - Number of references - 3 N1 - Last updated - 2016-04-01 N1 - SubjectsTermNotLitGenreText - Allende Meteorite; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; CV chondrites; ICP mass spectra; inclusions; isotopes; mass spectra; metals; meteorites; precision; radioactive isotopes; Sn-126; spectra; stony meteorites; Te-126; tellurium; tin; variations ER - TY - JOUR T1 - Composition and redox conditions in historic nuclear fallout AN - 1777466347; 2016-030265 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Holliday, K S AU - Booth, C H AU - Pacold, J I AU - Dierken, J AU - Monroe, M AU - Fitzgerald, M AU - McClory, J AU - Hutcheon, I AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 1293 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - isotopes KW - XAFS spectra KW - electron microscopy data KW - X-ray spectra KW - iron KW - autoradiography KW - XANES spectra KW - radiography KW - radioactive fallout KW - models KW - radioactive isotopes KW - major elements KW - metals KW - composition KW - spectra KW - SEM data KW - Eh KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777466347?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Composition+and+redox+conditions+in+historic+nuclear+fallout&rft.au=Holliday%2C+K+S%3BBooth%2C+C+H%3BPacold%2C+J+I%3BDierken%2C+J%3BMonroe%2C+M%3BFitzgerald%2C+M%3BMcClory%2C+J%3BHutcheon%2C+I%3BAnonymous&rft.aulast=Holliday&rft.aufirst=K&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=1293&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/1293.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 - Number of references - 2 N1 - Document feature - illus. N1 - Last updated - 2016-04-01 N1 - SubjectsTermNotLitGenreText - autoradiography; composition; Eh; electron microscopy data; iron; isotopes; major elements; metals; models; radioactive fallout; radioactive isotopes; radiography; SEM data; spectra; X-ray spectra; XAFS spectra; XANES spectra ER - TY - JOUR T1 - Chronology of 15445 norite clast B and implications for Mg-suite magmatism AN - 1773797611; 2016-022732 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gaffney, A M AU - Borg, L E AU - Shearer, Charles K AU - Burger, Paul V AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 1443 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - silicates KW - magnesian-suite KW - igneous rocks KW - thermal ionization mass spectra KW - mass spectra KW - lunar highlands KW - Lu/Hf KW - pyroxene group KW - plutonic rocks KW - chronology KW - Sample 15445 KW - dates KW - absolute age KW - framework silicates KW - spectra KW - rare earths KW - norite KW - chain silicates KW - plagioclase KW - magma oceans KW - Moon KW - magmatism KW - differentiation KW - clasts KW - ICP mass spectra KW - lunar samples KW - Sm/Nd KW - metals KW - lunar crust KW - crystallization KW - gabbros KW - feldspar group KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773797611?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Chronology+of+15445+norite+clast+B+and+implications+for+Mg-suite+magmatism&rft.au=Gaffney%2C+A+M%3BBorg%2C+L+E%3BShearer%2C+Charles+K%3BBurger%2C+Paul+V%3BAnonymous&rft.aulast=Gaffney&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/1443.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 Dec. 1, 2015 N1 - Last updated - 2016-03-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; chain silicates; chronology; clasts; crystallization; dates; differentiation; feldspar group; framework silicates; gabbros; ICP mass spectra; igneous rocks; Lu/Hf; lunar crust; lunar highlands; lunar samples; magma oceans; magmatism; magnesian-suite; mass spectra; metals; Moon; norite; plagioclase; plutonic rocks; pyroxene group; rare earths; Sample 15445; silicates; Sm/Nd; spectra; thermal ionization mass spectra ER - TY - JOUR T1 - Investigating zircon shock microstructures with NanoSIMS AN - 1769966698; 2016-020700 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Crow, C A AU - Jacobsen, B AU - McKeegan, K D AU - Moser, D E AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2470 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - silicates KW - U/Pb KW - ion probe data KW - microstructure KW - mass spectra KW - calibration KW - twinning KW - melts KW - melt inclusions KW - electron backscatter diffraction data KW - impact melts KW - errors KW - dates KW - inclusions KW - orthosilicates KW - absolute age KW - spectra KW - mobility KW - zoning KW - uncertainty KW - zircon group KW - Pb/Pb KW - Moon KW - zircon KW - metamorphism KW - nesosilicates KW - crystallization KW - NanoSIMS KW - fluid inclusions KW - shock metamorphism KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769966698?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Investigating+zircon+shock+microstructures+with+NanoSIMS&rft.au=Crow%2C+C+A%3BJacobsen%2C+B%3BMcKeegan%2C+K+D%3BMoser%2C+D+E%3BAnonymous&rft.aulast=Crow&rft.aufirst=C&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/2470.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. 1 table N1 - SuppNotes - Accessed on Nov. 9, 2015 N1 - Last updated - 2016-03-03 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; calibration; crystallization; dates; electron backscatter diffraction data; errors; fluid inclusions; impact melts; inclusions; ion probe data; mass spectra; melt inclusions; melts; metamorphism; microstructure; mobility; Moon; NanoSIMS; nesosilicates; orthosilicates; Pb/Pb; shock metamorphism; silicates; spectra; twinning; U/Pb; uncertainty; zircon; zircon group; zoning ER - TY - JOUR T1 - Glacier fluctuations in the Rwenzori Mountains, Uganda, during late-glacial time AN - 1765870519; 2016-014603 AB - As the locus of global water vapor production and atmospheric convergence, the tropics have a strong influence on global climate. Whether the tropics played a role in millennial-scale climate changes during late-glacial time is not well established. In an effort to improve the understanding of late glacial climate changes in the tropics, we are developing records of past glacial extents at high altitude (2600-4000 m asl) in the Rwenzori Mountains ( approximately 1 degrees N, 30 degrees E) of Uganda. Here we present a chronology of glacier extents from the Last Glacial Maximum (LGM) to early Holocene time using (super 10) Be dating. Glaciers in the Bujuku and Mubuku Valleys in the central Rwenzori Mountains reached their maximum extents at approximately 23.4 and approximately 20.1 ka, similar to the timing of LGM glacier extents in the Northern Hemisphere. In a valley to the south, the maximal glacier extent during the last glacial period was reached at approximately 17.2 ka, similar to the timing of Heinrich Stadial 1. Glacier recession in the Bujuku Valley subsequent to the LGM stalled, or was interrupted by a readvance, at approximately 13.8-13.4 ka. Subsequently, ice receded approximately 1.5 km upvalley to another moraine position dated at approximately 11.1 ka. This date is coeval with (super 10) Be ages of moraines in the Nyamugasani Valley, located in the southern Rwenzori Mountains. There, glacier recession occurred between approximately 11.5 and 10.5 ka. No additional moraines occur in either the Bujuku or Nyamugasani Valleys between the early Holocene moraines and estimated late Holocene age moraines upvalley. We compare the chronology of glacial extents in the Rwenzori Mountains with similar datasets from tropical South America. There is a broad synchrony in the timing of glacier fluctuations during late glacial time in tropical South America and Africa suggesting that these glaciers responded to a common driver during the late glacial period. JF - Abstracts with Programs - Geological Society of America AU - Jackson, Margaret S AU - Kelly, Meredith A AU - Russell, James M AU - Howley, Jennifer A AU - Doughty, Alice M AU - Baber, Margaret B AU - Loomis, Shannon E AU - Zimmerman, Susan H 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 KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765870519?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Glacier+fluctuations+in+the+Rwenzori+Mountains%2C+Uganda%2C+during+late-glacial+time&rft.au=Jackson%2C+Margaret+S%3BKelly%2C+Meredith+A%3BRussell%2C+James+M%3BHowley%2C+Jennifer+A%3BDoughty%2C+Alice+M%3BBaber%2C+Margaret+B%3BLoomis%2C+Shannon+E%3BZimmerman%2C+Susan+H%3BAnonymous&rft.aulast=Jackson&rft.aufirst=Margaret&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 - Lithium sputtering from lithium-coated plasma facing components in the NSTX divertor AN - 1746895809; PQ0002263646 AB - Lithium sputtering yields and gross impurity influxes from lithium-coated graphite and molybdenum plasma facing components (PFCs) have been analyzed for the first time in the National Spherical Torus Experiment (NSTX) divertor during H-mode NBI-heated discharges. Motivated by the beneficial effects of lithium conditioning on discharge performance and reproducibility, evaporative lithium coatings were the routine wall conditioning technique in NSTX. Neutral lithium sputtering yields from solid lithium coatings in NSTX were found to be consistent with values reported from test stand experiments from deuterium-saturated lithium (with sputtering yields Y sub(Li) ~ 0.03-0.07). Temperature-enhanced lithium sputtering was observed on lithium-coated graphite and molybdenum as a result of PFC heating by both embedded heaters and incident plasma heat flux, leading to Y sub(Li) ~ 0.1-0.2 for surface temperatures above the lithium melting point. JF - Journal of Nuclear Materials AU - Scotti, F AU - Soukhanovskii, V A AU - Ahn, J-W AU - Bell, R E AU - Gerhardt, S P AU - Jaworski, M A AU - Kaita, R AU - Kugel, H W AU - McLean, A G AU - Meier, E T AU - Podesta, M AU - Roquemore, A L AD - Lawrence Livermore National Laboratory, Livermore, 94551 CA, USA, fscotti@pppl.gov PY - 2015 SP - 1165 EP - 1168 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 463 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Melting point KW - Molybdenum KW - Radioactive materials KW - Temperature KW - Lithium KW - Coatings KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1746895809?accountid=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=Lithium+sputtering+from+lithium-coated+plasma+facing+components+in+the+NSTX+divertor&rft.au=Scotti%2C+F%3BSoukhanovskii%2C+V+A%3BAhn%2C+J-W%3BBell%2C+R+E%3BGerhardt%2C+S+P%3BJaworski%2C+M+A%3BKaita%2C+R%3BKugel%2C+H+W%3BMcLean%2C+A+G%3BMeier%2C+E+T%3BPodesta%2C+M%3BRoquemore%2C+A+L&rft.aulast=Scotti&rft.aufirst=F&rft.date=2015-01-01&rft.volume=463&rft.issue=&rft.spage=1165&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.12.032 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Number of references - 23 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Melting point; Radioactive materials; Molybdenum; Temperature; Lithium; Coatings DO - http://dx.doi.org/10.1016/j.jnucmat.2014.12.032 ER - TY - JOUR T1 - Modeling detachment physics in the NSTX snowflake divertor AN - 1746893825; PQ0002263656 AB - The snowflake divertor is a proposed technique for coping with the tokamak power exhaust problem in next-step experiments and eventually reactors, where extreme power fluxes to material surfaces represent a leading technological and physics challenge. In lithium-conditioned National Spherical Torus Experiment (NSTX) discharges, application of the snowflake divertor typically induced partial outer divertor detachment and severalfold heat flux reduction. UEDGE is used to analyze and compare conventional and snowflake divertor configurations in NSTX. Matching experimental upstream profiles and divertor measurements in the snowflake requires target recycling of 0.97 vs. 0.91 in the conventional case, implying partial saturation of the lithium-based pumping mechanism. Density scans are performed to analyze the mechanisms that facilitate detachment in the snowflake, revealing that increased divertor volume provides most of the parallel heat flux reduction. Also, neutral gas power loss is magnified by the increased wetted area in the snowflake, and plays a key role in generating volumetric recombination. JF - Journal of Nuclear Materials AU - Meier, E T AU - Soukhanovskii, V A AU - Bell, R E AU - Diallo, A AU - Kaita, R AU - Leblanc, B P AU - McLean, A G AU - Podesta, M AU - Rognlien, T D AU - Scotti, F AD - Lawrence Livermore National Laboratory, Livermore, CA 94551, USA, emeier@wm.edu PY - 2015 SP - 1200 EP - 1204 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 463 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Nuclear reactors KW - Radioactive materials KW - Upstream KW - Recycling KW - Waste management KW - ENA 17:Waste Management-Solid UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1746893825?accountid=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=Modeling+detachment+physics+in+the+NSTX+snowflake+divertor&rft.au=Meier%2C+E+T%3BSoukhanovskii%2C+V+A%3BBell%2C+R+E%3BDiallo%2C+A%3BKaita%2C+R%3BLeblanc%2C+B+P%3BMcLean%2C+A+G%3BPodesta%2C+M%3BRognlien%2C+T+D%3BScotti%2C+F&rft.aulast=Meier&rft.aufirst=E&rft.date=2015-01-01&rft.volume=463&rft.issue=&rft.spage=1200&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2015.01.007 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Number of references - 33 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Nuclear reactors; Radioactive materials; Upstream; Recycling; Waste management DO - http://dx.doi.org/10.1016/j.jnucmat.2015.01.007 ER - TY - JOUR T1 - Electron pressure balance in the SOL through the transition to detachment AN - 1746884754; PQ0002263501 AB - Upgrades to core and divertor Thomson scattering (DTS) diagnostics at DIII-D have provided measurements of electron pressure profiles in the lower divertor from attached- to fully-detached divertor plasma conditions. Detailed, multistep sequences of discharges with increasing line-averaged density were run at several levels of Pinj. Strike point sweeping allowed 2D divertor characterization using DTS optimized to measure Te down to 0.5 eV. The ionization front at the onset of detachment is found to move upwards in a controlled manner consistent with the indication that scrape-off layer parallel power flux is converted from conducted to convective heat transport. Measurements of ne, Te and pe in the divertor versus L sub(parallel) demonstrate a rapid transition from Te [> or =, slanted] 15 eV to [< or =, slant]3 eV occurring both at the outer strike point and upstream of the X-point. These observations provide a strong benchmark for ongoing modeling of divertor detachment for existing and future tokamak devices. JF - Journal of Nuclear Materials AU - McLean, A G AU - Leonard, A W AU - Makowski, M A AU - Groth, M AU - Allen, S L AU - Boedo, J A AU - Bray, B D AU - Briesemeister, A R AU - Carlstrom, T N AU - Eldon, D AD - Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, mclean@fusion.gat.com PY - 2015 SP - 533 EP - 536 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 463 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Radioactive materials KW - Upstream KW - Benchmarks KW - Heat transport KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1746884754?accountid=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=Electron+pressure+balance+in+the+SOL+through+the+transition+to+detachment&rft.au=McLean%2C+A+G%3BLeonard%2C+A+W%3BMakowski%2C+M+A%3BGroth%2C+M%3BAllen%2C+S+L%3BBoedo%2C+J+A%3BBray%2C+B+D%3BBriesemeister%2C+A+R%3BCarlstrom%2C+T+N%3BEldon%2C+D&rft.aulast=McLean&rft.aufirst=A&rft.date=2015-01-01&rft.volume=463&rft.issue=&rft.spage=533&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2015.01.066 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Number of references - 13 N1 - Last updated - 2016-01-06 N1 - SubjectsTermNotLitGenreText - Radioactive materials; Upstream; Benchmarks; Heat transport DO - http://dx.doi.org/10.1016/j.jnucmat.2015.01.066 ER - TY - JOUR T1 - Models of SOL transport and their relation to scaling of the divertor heat flux width in DIII-D AN - 1746884703; PQ0002263399 AB - Strong support for the critical pressure gradient model for the heat flux width has been obtained, in that the measured separatrix pressure gradient lies below and scales similarly to the pressure gradient limit obtained from the ideal, infinite-n stability codes, BALOO and 2DX, in all cases that have been examined. Predictions of a heuristic drift model for the heat flux width are also in qualitative agreement with the measurements. These results have been obtained using an improved high rep-rate and higher edge spatial resolution Thomson scattering system on DIII-D to measure the upstream electron temperature and density profiles. In order to compare theory and experiment, profiles of density, temperature, and pressure for both electrons and ions are needed as well values of these quantities at the separatrix. A simple method to identify a proxy for the separatrix has been developed to do so. JF - Journal of Nuclear Materials AU - Makowski, M A AU - Lasnier, C J AU - Leonard, A W AU - Osborne, T H AU - Umansky, M AU - Elder, J D AU - Nichols, J H AU - Stangeby, P C AU - Baver, D A AU - Myra, J R AD - Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, makowski1@llnl.gov PY - 2015 SP - 55 EP - 60 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 463 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Prediction KW - Ions KW - Radioactive materials KW - Temperature KW - Upstream KW - Scaling KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1746884703?accountid=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=Models+of+SOL+transport+and+their+relation+to+scaling+of+the+divertor+heat+flux+width+in+DIII-D&rft.au=Makowski%2C+M+A%3BLasnier%2C+C+J%3BLeonard%2C+A+W%3BOsborne%2C+T+H%3BUmansky%2C+M%3BElder%2C+J+D%3BNichols%2C+J+H%3BStangeby%2C+P+C%3BBaver%2C+D+A%3BMyra%2C+J+R&rft.aulast=Makowski&rft.aufirst=M&rft.date=2015-01-01&rft.volume=463&rft.issue=&rft.spage=55&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.09.065 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Number of references - 18 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Prediction; Ions; Radioactive materials; Temperature; Upstream; Scaling DO - http://dx.doi.org/10.1016/j.jnucmat.2014.09.065 ER - TY - JOUR T1 - Regional climate and land use change recorded in the sedimentary record of Lago Lungo and Ripasottile, Rieti Basin, Lazio, Italy AN - 1739085305; 2015-117335 JF - Open-File Report - U. S. Geological Survey AU - Archer, Claire AU - Noble, Paula J AU - Mensing, Scott AU - Sagnotti, Leonardo AU - Florindo, Fabio AU - Tunno, Irene AU - Cifani, Gabriele AU - Passigli, Susanna AU - Zimmerman, Susan H AU - Piovesan, Gianluca Y1 - 2015 PY - 2015 DA - 2015 SP - 19 EP - 20 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - paleoseismicity KW - Little Ice Age KW - Europe KW - paleoclimatology KW - Holocene KW - Italy KW - cores KW - variations KW - Southern Europe KW - Cenozoic KW - pollen KW - sediments KW - miospores KW - Latium Italy KW - USGS KW - Roman period KW - Quaternary KW - Rieti Basin KW - Lago Lungo KW - Neoglacial KW - Ripasottile KW - palynomorphs KW - lacustrine environment KW - Tiber River basin KW - reconstruction KW - upper Holocene KW - microfossils KW - land use KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085305?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Open-File+Report+-+U.+S.+Geological+Survey&rft.atitle=Regional+climate+and+land+use+change+recorded+in+the+sedimentary+record+of+Lago+Lungo+and+Ripasottile%2C+Rieti+Basin%2C+Lazio%2C+Italy&rft.au=Archer%2C+Claire%3BNoble%2C+Paula+J%3BMensing%2C+Scott%3BSagnotti%2C+Leonardo%3BFlorindo%2C+Fabio%3BTunno%2C+Irene%3BCifani%2C+Gabriele%3BPassigli%2C+Susanna%3BZimmerman%2C+Susan+H%3BPiovesan%2C+Gianluca&rft.aulast=Archer&rft.aufirst=Claire&rft.date=2015-01-01&rft.volume=&rft.issue=&rft.spage=19&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/10.3133%2Fofr20151092 L2 - http://pubs.er.usge.gov/browse/usgs-publi LA - English DB - GeoRef N1 - Conference title - Sixth international limnology congress N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - VA N1 - Last updated - 2015-12-04 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - Cenozoic; cores; Europe; Holocene; Italy; lacustrine environment; Lago Lungo; lake sediments; land use; Latium Italy; Little Ice Age; microfossils; miospores; Neoglacial; paleoclimatology; paleoseismicity; palynomorphs; pollen; Quaternary; reconstruction; Rieti Basin; Ripasottile; Roman period; sediments; Southern Europe; Tiber River basin; upper Holocene; USGS; variations DO - http://dx.doi.org/10.3133/ofr20151092 ER - TY - JOUR T1 - Holocene climate history of the central eastern Sierra from high-resolution geochemistry of the BINGO sediment core, Mono Lake, California, USA AN - 1739085294; 2015-117475 JF - Open-File Report - U. S. Geological Survey AU - Zimmerman, Susan H AU - Hemming, Sidney AU - Starratt, Scott W Y1 - 2015 PY - 2015 DA - 2015 SP - 242 EP - 243 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - United States KW - Sierra Nevada KW - volcanic rocks KW - BINGO core KW - igneous rocks KW - paleoclimatology KW - Holocene KW - cores KW - Cenozoic KW - California KW - volcanism KW - sediments KW - X-ray fluorescence spectra KW - spectra KW - USGS KW - geochemistry KW - high-resolution methods KW - Quaternary KW - Mono County California KW - pyroclastics KW - Mono Lake KW - lacustrine environment KW - reconstruction KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085294?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Open-File+Report+-+U.+S.+Geological+Survey&rft.atitle=Holocene+climate+history+of+the+central+eastern+Sierra+from+high-resolution+geochemistry+of+the+BINGO+sediment+core%2C+Mono+Lake%2C+California%2C+USA&rft.au=Zimmerman%2C+Susan+H%3BHemming%2C+Sidney%3BStarratt%2C+Scott+W&rft.aulast=Zimmerman&rft.aufirst=Susan&rft.date=2015-01-01&rft.volume=&rft.issue=&rft.spage=242&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/10.3133%2Fofr20151092 L2 - http://pubs.er.usge.gov/browse/usgs-publi LA - English DB - GeoRef N1 - Conference title - Sixth international limnology congress N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 4 N1 - PubXState - VA N1 - Last updated - 2015-12-04 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - BINGO core; California; Cenozoic; cores; geochemistry; high-resolution methods; Holocene; igneous rocks; lacustrine environment; lake sediments; Mono County California; Mono Lake; paleoclimatology; pyroclastics; Quaternary; reconstruction; sediments; Sierra Nevada; spectra; United States; USGS; volcanic rocks; volcanism; X-ray fluorescence spectra DO - http://dx.doi.org/10.3133/ofr20151092 ER - TY - JOUR T1 - Late Holocene (3.65 ka) transition from Neopluvial Period to increased aridity in the Lake Tahoe-Pyramid Lake watershed, California AN - 1739082552; 2015-117424 JF - Open-File Report - U. S. Geological Survey AU - Noble, Paula J AU - Zimmerman, Susan H AU - Ball, G Ian AU - Adams, Kenneth D AU - Maloney, Jillian AU - Smith, Shane B Y1 - 2015 PY - 2015 DA - 2015 SP - 160 EP - 161 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - United States KW - terrestrial environment KW - isotopes KW - watersheds KW - algae KW - Holocene KW - stable isotopes KW - cores KW - nitrogen KW - Neopluvial KW - Cenozoic KW - California KW - diatoms KW - carbon KW - Pyramid Lake KW - USGS KW - hydrology KW - Plantae KW - Quaternary KW - isotope ratios KW - arid environment KW - C-13/C-12 KW - shorelines KW - lacustrine environment KW - reconstruction KW - upper Holocene KW - microfossils KW - Lake Tahoe KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739082552?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Open-File+Report+-+U.+S.+Geological+Survey&rft.atitle=Late+Holocene+%283.65+ka%29+transition+from+Neopluvial+Period+to+increased+aridity+in+the+Lake+Tahoe-Pyramid+Lake+watershed%2C+California&rft.au=Noble%2C+Paula+J%3BZimmerman%2C+Susan+H%3BBall%2C+G+Ian%3BAdams%2C+Kenneth+D%3BMaloney%2C+Jillian%3BSmith%2C+Shane+B&rft.aulast=Noble&rft.aufirst=Paula&rft.date=2015-01-01&rft.volume=&rft.issue=&rft.spage=160&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/10.3133%2Fofr20151092 L2 - http://pubs.er.usge.gov/browse/usgs-publi LA - English DB - GeoRef N1 - Conference title - Sixth international limnology congress N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 3 N1 - PubXState - VA N1 - Last updated - 2015-12-04 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - algae; arid environment; C-13/C-12; California; carbon; Cenozoic; cores; diatoms; Holocene; hydrology; isotope ratios; isotopes; lacustrine environment; Lake Tahoe; microfossils; Neopluvial; nitrogen; Plantae; Pyramid Lake; Quaternary; reconstruction; shorelines; stable isotopes; terrestrial environment; United States; upper Holocene; USGS; watersheds DO - http://dx.doi.org/10.3133/ofr20151092 ER - TY - JOUR T1 - A 1,600 year record of climate change from Big Soda Lake, Nevada, USA AN - 1739082461; 2015-117435 JF - Open-File Report - U. S. Geological Survey AU - Reidy, Liam AU - Byrne, Roger AU - Ingram, Lynn AU - Rosen, Michael R AU - Zimmerman, Susan H AU - Reheis, Marith Y1 - 2015 PY - 2015 DA - 2015 SP - 177 EP - 178 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - United States KW - Big Soda Lake KW - oxygen KW - isotopes KW - lead KW - paleoclimatology KW - Holocene KW - stable isotopes KW - climate change KW - Cenozoic KW - radioactive isotopes KW - sediments KW - USGS KW - geochemistry KW - Nevada KW - hydrology KW - Quaternary KW - isotope ratios KW - O-18/O-16 KW - limnology KW - metals KW - lacustrine environment KW - reconstruction KW - upper Holocene KW - Pb-210 KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739082461?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Open-File+Report+-+U.+S.+Geological+Survey&rft.atitle=A+1%2C600+year+record+of+climate+change+from+Big+Soda+Lake%2C+Nevada%2C+USA&rft.au=Reidy%2C+Liam%3BByrne%2C+Roger%3BIngram%2C+Lynn%3BRosen%2C+Michael+R%3BZimmerman%2C+Susan+H%3BReheis%2C+Marith&rft.aulast=Reidy&rft.aufirst=Liam&rft.date=2015-01-01&rft.volume=&rft.issue=&rft.spage=177&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/10.3133%2Fofr20151092 L2 - http://pubs.er.usge.gov/browse/usgs-publi LA - English DB - GeoRef N1 - Conference title - Sixth international limnology congress N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 1 N1 - PubXState - VA N1 - Document feature - sketch map N1 - Last updated - 2015-12-04 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - Big Soda Lake; Cenozoic; climate change; geochemistry; Holocene; hydrology; isotope ratios; isotopes; lacustrine environment; lake sediments; lead; limnology; metals; Nevada; O-18/O-16; oxygen; paleoclimatology; Pb-210; Quaternary; radioactive isotopes; reconstruction; sediments; stable isotopes; United States; upper Holocene; USGS DO - http://dx.doi.org/10.3133/ofr20151092 ER - TY - JOUR T1 - Prospects for a million-year history of the Mono Lake basin from a long drill core AN - 1739082085; 2015-117474 JF - Open-File Report - U. S. Geological Survey AU - Zimmerman, Susan H AU - Hemming, Sidney Y1 - 2015 PY - 2015 DA - 2015 SP - 241 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - United States KW - Sierra Nevada KW - Quaternary KW - Mono County California KW - paleomagnetism KW - paleoclimatology KW - cores KW - Cenozoic KW - California KW - paleolimnology KW - Mono Lake KW - volcanism KW - upper Quaternary KW - sediments KW - lacustrine environment KW - drainage basins KW - reconstruction KW - USGS KW - geochemistry KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739082085?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Open-File+Report+-+U.+S.+Geological+Survey&rft.atitle=Prospects+for+a+million-year+history+of+the+Mono+Lake+basin+from+a+long+drill+core&rft.au=Zimmerman%2C+Susan+H%3BHemming%2C+Sidney&rft.aulast=Zimmerman&rft.aufirst=Susan&rft.date=2015-01-01&rft.volume=&rft.issue=&rft.spage=241&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/10.3133%2Fofr20151092 L2 - http://pubs.er.usge.gov/browse/usgs-publi LA - English DB - GeoRef N1 - Conference title - Sixth international limnology congress N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - VA N1 - Last updated - 2015-12-04 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - California; Cenozoic; cores; drainage basins; geochemistry; lacustrine environment; lake sediments; Mono County California; Mono Lake; paleoclimatology; paleolimnology; paleomagnetism; Quaternary; reconstruction; sediments; Sierra Nevada; United States; upper Quaternary; USGS; volcanism DO - http://dx.doi.org/10.3133/ofr20151092 ER - TY - JOUR T1 - The Global Landscape of Occupational Exposure Limits--Implementation of Harmonization Principles to Guide Limit Selection. AN - 1736414401; 26099071 AB - Occupational exposure limits (OELs) serve as health-based benchmarks against which measured or estimated workplace exposures can be compared. In the years since the introduction of OELs to public health practice, both developed and developing countries have established processes for deriving, setting, and using OELs to protect workers exposed to hazardous chemicals. These processes vary widely, however, and have thus resulted in a confusing international landscape for identifying and applying such limits in workplaces. The occupational hygienist will encounter significant overlap in coverage among organizations for many chemicals, while other important chemicals have OELs developed by few, if any, organizations. Where multiple organizations have published an OEL, the derived value often varies considerably-reflecting differences in both risk policy and risk assessment methodology as well as access to available pertinent data. This article explores the underlying reasons for variability in OELs, and recommends the harmonization of risk-based methods used by OEL-deriving organizations. A framework is also proposed for the identification and systematic evaluation of OEL resources, which occupational hygienists can use to support risk characterization and risk management decisions in situations where multiple potentially relevant OELs exist. JF - Journal of occupational and environmental hygiene AU - Deveau, M AU - Chen, C-P AU - Johanson, G AU - Krewski, D AU - Maier, A AU - Niven, K J AU - Ripple, S AU - Schulte, P A AU - Silk, J AU - Urbanus, J H AU - Zalk, D M AU - Niemeier, R W AD - a McLaughlin Centre for Population Health Risk Assessment, University of Ottawa , Ottawa , Ontario , Canada. ; c Department of Occupational Safety and Health, College of Public Health, China Medical University , Taichung , Taiwan. ; d Work Environment Toxicology, Institute of Environmental Medicine, Karolinska Institutet , Stockholm , Sweden. ; e Department of Environmental Health, College of Medicine, University of Cincinnati , Cincinnati , Ohio. ; f Shell Health, Shell International B.V. , The Hague , The Netherlands. ; g Global Industrial Hygiene Expertise Center, The Dow Chemical Company , Midland , Michigan. ; h Education and Information Division, National Institute for Occupational Safety and Health , Cincinnati , Ohio. ; i Directorate of Standards and Guidance, Occupational Safety and Health Administration , Washington, DC (Retired). ; j ES&H Directorate, Lawrence Livermore National Laboratory , Livermore , California. ; k Education and Information Division, National Institute for Occupational Safety and Health , Cincinnati , Ohio. Y1 - 2015 PY - 2015 DA - 2015 SP - S127 EP - S144 VL - 12 Suppl 1 KW - Hazardous Substances KW - 0 KW - Index Medicus KW - harmonization KW - risk policy KW - risk science KW - occupational exposure limit KW - Occupational Health KW - International Cooperation KW - Humans KW - Risk Management KW - Hazardous Substances -- toxicity KW - Threshold Limit Values KW - Occupational Exposure -- prevention & control KW - Occupational Exposure -- standards KW - Risk Assessment -- methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1736414401?accountid=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+occupational+and+environmental+hygiene&rft.atitle=The+Global+Landscape+of+Occupational+Exposure+Limits--Implementation+of+Harmonization+Principles+to+Guide+Limit+Selection.&rft.au=Deveau%2C+M%3BChen%2C+C-P%3BJohanson%2C+G%3BKrewski%2C+D%3BMaier%2C+A%3BNiven%2C+K+J%3BRipple%2C+S%3BSchulte%2C+P+A%3BSilk%2C+J%3BUrbanus%2C+J+H%3BZalk%2C+D+M%3BNiemeier%2C+R+W&rft.aulast=Deveau&rft.aufirst=M&rft.date=2015-01-01&rft.volume=12+Suppl+1&rft.issue=&rft.spage=S127&rft.isbn=&rft.btitle=&rft.title=Journal+of+occupational+and+environmental+hygiene&rft.issn=1545-9632&rft_id=info:doi/10.1080%2F15459624.2015.1060327 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-09-23 N1 - Date created - 2015-11-20 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: J Toxicol Environ Health B Crit Rev. 2010 Oct;13(7-8):546-78 [21170809] Regul Toxicol Pharmacol. 2010 Nov;58(2):323-9 [20655351] J Toxicol Environ Health A. 2011;74(2-4):261-85 [21218351] Crit Rev Toxicol. 2010 Oct;40(9):791-8 [20860525] Crit Rev Toxicol. 2010 Sep;40(8):671-96 [20722583] Int J Occup Environ Health. 2010 Jul-Sep;16(3):249-62 [20662417] Ind Health. 2010;48(1):18-28 [20160404] Toxicol Appl Pharmacol. 2008 Nov 15;233(1):71-5 [19013305] J Appl Toxicol. 2008 Oct;28(7):858-66 [18381691] Regul Toxicol Pharmacol. 2008 Aug;51(3):253-69 [18502550] J Occup Environ Hyg. 2008 May;5(5):330-46 [18350442] Regul Toxicol Pharmacol. 2008 Mar;50(2):261-70 [18226844] J Occup Environ Hyg. 2015;12 Suppl 1:S55-68 [26097979] J Occup Environ Hyg. 2015;12 Suppl 1:S7-17 [26252067] J Occup Environ Hyg. 2015;12 Suppl 1:S99-111 [26302336] Regul Toxicol Pharmacol. 2001 Oct;34(2):153-69 [11603958] Environ Health Perspect. 2014 Aug;122(8):796-805 [24727499] Toxicology. 2013 Nov 16;313(2-3):160-73 [23219588] Regul Toxicol Pharmacol. 2013 Jul;66(2):241-7 [23579077] Ann Occup Hyg. 2012 Jul;56(5):506-14 [22752095] Ann Occup Hyg. 2012 Jul;56(5):525-41 [22267129] Regul Toxicol Pharmacol. 2011 Dec;61(3):296-309 [21907258] Regul Toxicol Pharmacol. 2011 Oct;61(1):63-72 [21712060] Toxicol Sci. 2011 Jun;121(2):408-16 [21389111] Regul Toxicol Pharmacol. 2002 Dec;36(3):262-79 [12473411] Regul Toxicol Pharmacol. 1983 Sep;3(3):224-38 [6356243] Am J Ind Med. 1988;13(5):531-59 [3287906] Regul Toxicol Pharmacol. 1991 Jun;13(3):241-62 [1682974] Ann Occup Hyg. 1991 Dec;35(6):569-80 [1768007] Toxicol Lett. 1992 Dec;64-65 Spec No:53-7 [1471206] Toxicol Lett. 1995 May;77(1-3):183-7 [7618133] Regul Toxicol Pharmacol. 1997 Feb;25(1):1-5 [9056496] Regul Toxicol Pharmacol. 1997 Apr;25(2):121-9 [9185888] Toxicol Sci. 2005 Aug;86(2):226-30 [15829616] Regul Toxicol Pharmacol. 2005 Oct;43(1):1-9 [16099564] J Toxicol Environ Health B Crit Rev. 2007 Oct;10(7):527-57 [17934949] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1080/15459624.2015.1060327 ER - TY - JOUR T1 - Trench logs, terrestrial lidar system imagery, and radiocarbon data from the kilometer-62 site on the Greenville Fault, southeastern Alameda County, California, 2014 AN - 1729849194; 2015-102981 AB - In 2014, we investigated an abrupt 8.5-meter (m), right-laterally deflected stream channel located near the Greenville Fault in southeastern Alameda County, California (-121.56224 degrees E, 37.53430 degrees N) that we discovered using 0.5-m resolution, 2011 aerial lidar imagery flown along the active fault trace. Prior to trenching we surveyed the site using a terrestrial lidar system (TLS) to document the exact geomorphic expression of this deflected stream channel before excavating a trench adjacent to it. We trenched perpendicular to the fault hoping to document the prehistoric history of earthquake ruptures along the fault. However, the alluvial stratigraphy that we document in these trench logs shows conclusively that this trench did not expose any active fault trace. Using other local geomorphic evidence for the fault location, a straight fault scarp immediately north of this stream projects slightly upslope of the west end of our trench and may be the actual location of the active fault trace. Five radiocarbon samples establish age control for the alluvial sequence documented in the trench, which may in the future be useful in constraining the long-term slip rate of the Greenville Fault. The deflection had been caused by an abrupt nontectonic termination of unit u30, a relatively thick (0.15-0.35 m) silt that is more erosion resistant than the adjacent cohesionless sand and gravel. JF - Open-File Report - U. S. Geological Survey AU - Lienkaemper, James J AU - DeLong, Stephen B AU - Avdievitch, Nikita N AU - Pickering, Alexandra J AU - Guilderson, Thomas P Y1 - 2015 PY - 2015 DA - 2015 EP - 1 sheet PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - United States KW - trenching KW - Quaternary KW - laser methods KW - isotopes KW - Greenville Fault KW - slip rates KW - Alameda County California KW - Cenozoic KW - California KW - rupture KW - radioactive isotopes KW - lidar methods KW - dates KW - carbon KW - absolute age KW - C-14 KW - active faults KW - USGS KW - earthquakes KW - faults KW - cross sections KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729849194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Open-File+Report+-+U.+S.+Geological+Survey&rft.atitle=Trench+logs%2C+terrestrial+lidar+system+imagery%2C+and+radiocarbon+data+from+the+kilometer-62+site+on+the+Greenville+Fault%2C+southeastern+Alameda+County%2C+California%2C+2014&rft.au=Lienkaemper%2C+James+J%3BDeLong%2C+Stephen+B%3BAvdievitch%2C+Nikita+N%3BPickering%2C+Alexandra+J%3BGuilderson%2C+Thomas+P&rft.aulast=Lienkaemper&rft.aufirst=James&rft.date=2015-01-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/10.3133%2Fofr20151122 L2 - http://pubs.er.usge.gov/browse/usgs-publi LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 5 N1 - PubXState - VA N1 - Document feature - illus. incl. sects., 1 table, sketch maps N1 - Last updated - 2015-11-05 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - absolute age; active faults; Alameda County California; C-14; California; carbon; Cenozoic; cross sections; dates; earthquakes; faults; Greenville Fault; isotopes; laser methods; lidar methods; Quaternary; radioactive isotopes; rupture; slip rates; trenching; United States; USGS DO - http://dx.doi.org/10.3133/ofr20151122 ER - TY - JOUR T1 - Modern, Holocene, and Pleistocene lake locales in the western Great Basin, Nevada and California, June 21-25, 2015 AN - 1718050011; 2015-096504 JF - Open-File Report - U. S. Geological Survey AU - Zimmerman, Susan H AU - Adams, Kenneth D AU - Rosen, Michael R Y1 - 2015 PY - 2015 DA - 2015 SP - 61 EP - 88 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - United States KW - oxygen KW - Basin and Range Province KW - isotopes KW - field trips KW - Holocene KW - stable isotopes KW - road log KW - Cenozoic KW - California KW - carbon KW - sediments KW - paleosols KW - depositional environment KW - USGS KW - geochemistry KW - Nevada KW - Wilson Creek Formation KW - hydrology KW - North America KW - Mono Basin KW - Quaternary KW - Mono County California KW - western Great Basin KW - isotope ratios KW - Great Basin KW - C-13/C-12 KW - O-18/O-16 KW - limnology KW - lacustrine environment KW - Pleistocene KW - geomorphology KW - facies KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718050011?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Open-File+Report+-+U.+S.+Geological+Survey&rft.atitle=Modern%2C+Holocene%2C+and+Pleistocene+lake+locales+in+the+western+Great+Basin%2C+Nevada+and+California%2C+June+21-25%2C+2015&rft.au=Zimmerman%2C+Susan+H%3BAdams%2C+Kenneth+D%3BRosen%2C+Michael+R&rft.aulast=Zimmerman&rft.aufirst=Susan&rft.date=2015-01-01&rft.volume=&rft.issue=&rft.spage=61&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/10.3133%2Fofr20151108 L2 - http://pubs.er.usge.gov/browse/usgs-publi LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 75 N1 - PubXState - VA N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Prepared in cooperation with the International Association of Limnogeology N1 - Last updated - 2015-10-01 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - Basin and Range Province; C-13/C-12; California; carbon; Cenozoic; depositional environment; facies; field trips; geochemistry; geomorphology; Great Basin; Holocene; hydrology; isotope ratios; isotopes; lacustrine environment; limnology; Mono Basin; Mono County California; Nevada; North America; O-18/O-16; oxygen; paleosols; Pleistocene; Quaternary; road log; sediments; stable isotopes; United States; USGS; western Great Basin; Wilson Creek Formation DO - http://dx.doi.org/10.3133/ofr20151108 ER - TY - JOUR T1 - Sm/Nd systematics of lunar ferroan anorthositic suite rocks; constraints on lunar crust formation AN - 1668229520; 2015-029561 AB - We have measured Sm-Nd systematics, including the short-lived (super 146) Sm- (super 142) Nd chronometer, in lunar ferroan anorthositic suite (FAS) whole rocks (15415, 62236, 62255, 65315, 60025). At least some members of the suite are thought to be primary crystallization products formed by plagioclase flotation during crystallization of the lunar magma ocean (LMO). Most of these samples, except 62236, have not been exposed to galactic cosmic rays for a long period and thus require minimal correction to their (super 142) Nd isotope composition. These samples all have measured deficits in (super 142) Nd relative to the JNdi-1 terrestrial standard in the range -45 to -21 ppm. The range is -45 to -15 ppm once the 62236 (super 142) Nd/ (super 144) Nd ratio is corrected from neutron-capture effects. Analyzed FAS samples do not define a single isochron in either (super 146) Sm- (super 142) Nd or (super 147) Sm- (super 143) Nd systematics, suggesting that they either do not have the same crystallization age, come from different sources, or have suffered isotopic disturbance. Because the age is not known for some samples, we explore the implications of their initial isotopic compositions for crystallization ages in the first 400 Ma of solar system history, a timing interval that covers all the ages determined for the ferroan anorthositic suite whole rocks as well as different estimates for the crystallization of the LMO. 62255 has the largest deficit in initial (super 142) Nd and does not appear to have followed the same differentiation path as the other FAS samples. The large deficit in (super 142) Nd of FAN 62255 may suggest a crystallization age around 60-125 Ma after the beginning of solar system accretion. This result provides essential information about the age of the giant impact forming the Moon. The initial Nd isotopic compositions of FAS samples can be matched either with a bulk-Moon with chondritic Sm/Nd ratio but enstatite-chondrite-like initial (super 142) Nd/ (super 144) Nd (e.g. 10 ppm below modern terrestrial), or a bulk-Moon with superchondritic Sm/Nd ratio and initial (super 142) Nd/ (super 144) Nd similar to ordinary chondrites. Abstract Copyright (2015) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Boyet, Maud AU - Carlson, Richard W AU - Borg, Lars E AU - Horan, Mary Y1 - 2015/01/01/ PY - 2015 DA - 2015 Jan 01 SP - 203 EP - 218 PB - Elsevier, New York, NY VL - 148 SN - 0016-7037, 0016-7037 KW - silicates KW - stony meteorites KW - isotopes KW - igneous rocks KW - enrichment KW - thermal ionization mass spectra KW - mass spectra KW - recrystallization KW - Rb/Sr KW - meteorites KW - radioactive isotopes KW - plutonic rocks KW - whole rock KW - U/Th/Pb KW - dates KW - orthosilicates KW - absolute age KW - framework silicates KW - Archean KW - spectra KW - samarium KW - rare earths KW - chondrites KW - geochemistry KW - zircon group KW - plagioclase KW - accretion KW - Precambrian KW - Moon KW - alkali metals KW - zircon KW - cosmochemistry KW - anorthosite KW - nesosilicates KW - lunar samples KW - KREEP KW - Sm/Nd KW - metals KW - magmas KW - lunar crust KW - potassium KW - neodymium KW - feldspar group KW - crust KW - ferroan composition KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229520?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sm%2FNd+systematics+of+lunar+ferroan+anorthositic+suite+rocks%3B+constraints+on+lunar+crust+formation&rft.au=Boyet%2C+Maud%3BCarlson%2C+Richard+W%3BBorg%2C+Lars+E%3BHoran%2C+Mary&rft.aulast=Boyet&rft.aufirst=Maud&rft.date=2015-01-01&rft.volume=148&rft.issue=&rft.spage=203&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.09.021 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 - 78 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-04-02 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - absolute age; accretion; alkali metals; anorthosite; Archean; chondrites; cosmochemistry; crust; dates; enrichment; feldspar group; ferroan composition; framework silicates; geochemistry; igneous rocks; isotopes; KREEP; lunar crust; lunar samples; magmas; mass spectra; metals; meteorites; Moon; neodymium; nesosilicates; orthosilicates; plagioclase; plutonic rocks; potassium; Precambrian; radioactive isotopes; rare earths; Rb/Sr; recrystallization; samarium; silicates; Sm/Nd; spectra; stony meteorites; thermal ionization mass spectra; U/Th/Pb; whole rock; zircon; zircon group DO - http://dx.doi.org/10.1016/j.gca.2014.09.021 ER - TY - JOUR T1 - Refinements to the Graves and Pitarka (2010) broadband ground-motion simulation method AN - 1664439504; 2015-026730 JF - Seismological Research Letters AU - Graves, Robert AU - Pitarka, Arben AU - Dreger, Douglas S AU - Jordan, Thomas H Y1 - 2015/01// PY - 2015 DA - January 2015 SP - 75 EP - 80 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 1 SN - 0895-0695, 0895-0695 KW - United States KW - California KW - technology KW - Southern California KW - seismicity KW - ground motion KW - algorithms KW - simulation KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664439504?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Refinements+to+the+Graves+and+Pitarka+%282010%29+broadband+ground-motion+simulation+method&rft.au=Graves%2C+Robert%3BPitarka%2C+Arben%3BDreger%2C+Douglas+S%3BJordan%2C+Thomas+H&rft.aulast=Graves&rft.aufirst=Robert&rft.date=2015-01-01&rft.volume=86&rft.issue=1&rft.spage=75&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220140101 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 - 30 N1 - PubXState - CA N1 - Document feature - illus. N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - algorithms; California; earthquakes; ground motion; instruments; seismicity; simulation; Southern California; technology; United States DO - http://dx.doi.org/10.1785/0220140101 ER - TY - JOUR T1 - IN VIVO MEASUREMENT OF super(241)AM IN THE LUNGS CONFOUNDED BY ACTIVITY DEPOSITED IN OTHER ORGANS AN - 1660410546; 21339246 AB - Radioactive material deposited in multiple organs of the body is likely to confound a result of an in vivo measurement performed over the lungs, the most frequently monitored organ for occupational exposure. The significance of this interference was evaluated by measuring anthropometric torso phantoms containing lungs, liver, skeleton, and axillary lymph nodes, each with a precisely known quantity of super(241) Am uniformly distributed in the organs. Arrays of multiple high-resolution germanium detectors were positioned over organs within the torso phantom containing super(241)Am or over proximal organs without activity to determine the degree of measurement confounding due to photons emitted from other source organs. A set of four mathematical response functions describes the measured count rate with detectors positioned over each of the relevant organs and super(241)Am contained in the measured organ or one of the other organs selected as a confounder. Simultaneous solution of these equations by matrix algebra, where the diagonal terms of the matrix are calibration factors for a direct measurement of activity in an organ and the off-diagonal terms reflect the contribution (i.e., interference or cross-talk) produced by super(241)Am in a confounding organ, yields the activity deposited in each of the relevant organs. The matrix solution described in this paper represents a method for adjusting a result of super(241)Am measured directly in one organ for interferences that may arise from super(241) Am deposited elsewhere and represents a technically valid procedure to aid in evaluating internal dose based upon in vivo measurements for those radioactive materials known to deposit in multiple organs. JF - Health Physics AU - Lobaugh, Megan L AU - Spitz, Henry B AU - Glover, Samuel E AD - University of Cincinnati, Nuclear and Radiological Engineering Program, 598 Rhodes Hall, Cincinnati, OH 45221-0072; Currently at Lawrence Livermore National Laboratory, Livermore, CA 94550, lobaugml@mail.uc.edu Y1 - 2015/01// PY - 2015 DA - Jan 2015 SP - 67 EP - 75 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 108 IS - 1 SN - 0017-9078, 0017-9078 KW - Health & Safety Science Abstracts KW - 241Am KW - contamination, internal KW - monitoring, personnel KW - whole body counting KW - Lung KW - Radioactive materials KW - Germanium KW - Liver KW - Organs KW - Lymph nodes KW - Occupational exposure KW - H 1000:Occupational Safety and Health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660410546?accountid=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=IN+VIVO+MEASUREMENT+OF+super%28241%29AM+IN+THE+LUNGS+CONFOUNDED+BY+ACTIVITY+DEPOSITED+IN+OTHER+ORGANS&rft.au=Lobaugh%2C+Megan+L%3BSpitz%2C+Henry+B%3BGlover%2C+Samuel+E&rft.aulast=Lobaugh&rft.aufirst=Megan&rft.date=2015-01-01&rft.volume=108&rft.issue=1&rft.spage=67&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/10.1097%2FHP.0000000000000168 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2015-05-27 N1 - SubjectsTermNotLitGenreText - Lung; Radioactive materials; Liver; Germanium; Organs; Occupational exposure; Lymph nodes DO - http://dx.doi.org/10.1097/HP.0000000000000168 ER - TY - JOUR T1 - Origin of the lunar highlands Mg-suite; an integrated petrology, geochemistry, chronology, and remote sensing perspective AN - 1645574961; 2015-007721 AB - The Mg-suite represents an enigmatic episode of lunar highlands magmatism that presumably represents the first stage of crustal building following primordial differentiation. This review examines the mineralogy, geochemistry, petrology, chronology, and the planetary-scale distribution of this suite of highlands plutonic rocks, presents models for their origin, examines petrogenetic relationships to other highlands rocks, and explores the link between this style of magmatism and early stages of lunar differentiation. Of the models considered for the origin of the parent magmas for the Mg-suite, the data best fit a process in which hot (solidus temperature at > or =2 GPa = 1600 to 1800 degrees C) and less dense (rho approximately 3100 kg/m (super 3) ) early lunar magma ocean cumulates rise to the base of the crust during cumulate pile overturn. Some decompressional melting would occur, but placing a hot cumulate horizon adjacent to the plagioclase-rich primordial crust and KREEP-rich lithologies (at temperatures of <1300 degrees C) would result in the hybridization of these divergent primordial lithologies, producing Mg-suite parent magmas. As urKREEP (primeval KREEP) is not the "petrologic driver" of this style of magmatism, outside of the Procellarum KREEP Terrane (PKT), Mg-suite magmas are not required to have a KREEP signature. Evaluation of the chronology of this episode of highlands evolution indicates that Mg-suite magmatism was initiated soon after primordial differentiation (<10 m.y.). Alternatively, the thermal event associated with the mantle overturn may have disrupted the chronometers utilized to date the primordial crust. Petrogenetic relationships between the Mg-suite and other highlands suites (e.g., alkali-suite and magnesian anorthositic granulites) are consistent with both fractional crystallization processes and melting of distinctly different hybrid sources. JF - American Mineralogist AU - Shearer, Charles K AU - Elardo, Stephen M AU - Petro, Noah E AU - Borg, Lars E AU - McCubbin, Francis M Y1 - 2015/01// PY - 2015 DA - January 2015 SP - 294 EP - 325 PB - Mineralogical Society of America, Washington, DC VL - 100 IS - 1 SN - 0003-004X, 0003-004X KW - silicates KW - magmatic differentiation KW - magnesium KW - igneous rocks KW - olivine group KW - Apollo Program KW - lunar highlands KW - granulites KW - pyroxene group KW - plutonic rocks KW - mineral composition KW - chronology KW - cumulates KW - olivine KW - metamorphic rocks KW - orthosilicates KW - framework silicates KW - rare earths KW - mineral assemblages KW - norite KW - chemical composition KW - geochemistry KW - chain silicates KW - alkaline earth metals KW - plagioclase KW - magma oceans KW - petrology KW - Moon KW - magmatism KW - Oceanus Procellarum KW - intergrowths KW - anorthosite KW - nesosilicates KW - lunar samples KW - KREEP KW - troctolite KW - metals KW - magmas KW - gabbros KW - fractional crystallization KW - sulfides KW - feldspar group KW - crust KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645574961?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Origin+of+the+lunar+highlands+Mg-suite%3B+an+integrated+petrology%2C+geochemistry%2C+chronology%2C+and+remote+sensing+perspective&rft.au=Shearer%2C+Charles+K%3BElardo%2C+Stephen+M%3BPetro%2C+Noah+E%3BBorg%2C+Lars+E%3BMcCubbin%2C+Francis+M&rft.aulast=Shearer&rft.aufirst=Charles&rft.date=2015-01-01&rft.volume=100&rft.issue=1&rft.spage=294&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam-2015-4817 L2 - http://www.minsocam.org/MSA/AmMin/TOC/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 263 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-01-15 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - alkaline earth metals; anorthosite; Apollo Program; chain silicates; chemical composition; chronology; crust; cumulates; feldspar group; fractional crystallization; framework silicates; gabbros; geochemistry; granulites; igneous rocks; intergrowths; KREEP; lunar highlands; lunar samples; magma oceans; magmas; magmatic differentiation; magmatism; magnesium; metals; metamorphic rocks; mineral assemblages; mineral composition; Moon; nesosilicates; norite; Oceanus Procellarum; olivine; olivine group; orthosilicates; petrology; plagioclase; plutonic rocks; pyroxene group; rare earths; remote sensing; silicates; sulfides; troctolite DO - http://dx.doi.org/10.2138/am-2015-4817 ER - TY - CPAPER T1 - Towards Systematic Benchmarking of Climate Model Performance T2 - 47th American Geophysical Union Fall Meeting AN - 1651745112; 6333344 JF - 47th American Geophysical Union Fall Meeting AU - Gleckler, Peter 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/1651745112?accountid=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=Towards+Systematic+Benchmarking+of+Climate+Model+Performance&rft.au=Gleckler%2C+Peter&rft.aulast=Gleckler&rft.aufirst=Peter&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 - Comparison of Heterogeneously-Propped Hydraulic Fractures for Vertical and Lateral Wells T2 - 47th American Geophysical Union Fall Meeting AN - 1651744926; 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6334640 JF - 47th American Geophysical Union Fall Meeting AU - Antoun, Tarabay AU - Ezzedine, Souheil AU - Vorobiev, Oleg AU - Glenn, Lewis Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Mathematical models KW - Energy coupling KW - Energy KW - Simulation KW - Explosions KW - Joints UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651744044?accountid=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=Numerical+Simulations+of+Underground+Explosions%3A+Effect+of+Joints+Near+the+Source+on+Energy+Coupling%2C+Shear+Motions+and+Gas+Flow&rft.au=Antoun%2C+Tarabay%3BEzzedine%2C+Souheil%3BVorobiev%2C+Oleg%3BGlenn%2C+Lewis&rft.aulast=Antoun&rft.aufirst=Tarabay&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 - On the Nature of Cloud Property Errors in Contemporary Gcms: A Hindcast Approach T2 - 47th American Geophysical Union Fall Meeting AN - 1651742858; 6331859 JF - 47th American Geophysical Union Fall Meeting AU - Zelinka, Mark AU - Ma, Hsi-Yen Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Clouds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742858?accountid=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=On+the+Nature+of+Cloud+Property+Errors+in+Contemporary+Gcms%3A+A+Hindcast+Approach&rft.au=Zelinka%2C+Mark%3BMa%2C+Hsi-Yen&rft.aulast=Zelinka&rft.aufirst=Mark&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 - Intensified ENSO-Driven Precipitation Teleconnections in the Future T2 - 47th American Geophysical Union Fall Meeting AN - 1651742841; 6332070 JF - 47th American Geophysical Union Fall Meeting AU - Bonfils, Celine AU - Santer, Benjamin AU - Phillips, Thomas AU - Marvel, Kate AU - Leung, L AU - Doutriaux, Charles Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Precipitation KW - Teleconnections UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742841?accountid=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=Intensified+ENSO-Driven+Precipitation+Teleconnections+in+the+Future&rft.au=Bonfils%2C+Celine%3BSanter%2C+Benjamin%3BPhillips%2C+Thomas%3BMarvel%2C+Kate%3BLeung%2C+L%3BDoutriaux%2C+Charles&rft.aulast=Bonfils&rft.aufirst=Celine&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 - CAUSES: Clouds Above the United States and Errors at the Surface T2 - 47th American Geophysical Union Fall Meeting AN - 1651742817; 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T2 - 47th American Geophysical Union Fall Meeting AN - 1651742449; 6330873 JF - 47th American Geophysical Union Fall Meeting AU - Aines, Roger Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Power plants KW - Carbon dioxide UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742449?accountid=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=Concentrating+Carbon+Dioxide+-+What+Do+We+Know+from+Power+Plant+Capture+Research%3F&rft.au=Aines%2C+Roger&rft.aulast=Aines&rft.aufirst=Roger&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-Fluid Geo-Energy Systems for Bulk and Thermal Energy Storage and Dispatchable Renewable and Low-Carbon Electricity T2 - 47th American Geophysical Union Fall Meeting AN - 1651742195; 6331203 JF - 47th American Geophysical Union Fall Meeting AU - Buscheck, Thomas AU - Randolph, Jimmy AU - Saar, Martin AU - Hao, Yue AU - Sun, Yunwei AU - Bielicki, Jeffrey Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Storage KW - Energy KW - Energy storage KW - Electricity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742195?accountid=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-Fluid+Geo-Energy+Systems+for+Bulk+and+Thermal+Energy+Storage+and+Dispatchable+Renewable+and+Low-Carbon+Electricity&rft.au=Buscheck%2C+Thomas%3BRandolph%2C+Jimmy%3BSaar%2C+Martin%3BHao%2C+Yue%3BSun%2C+Yunwei%3BBielicki%2C+Jeffrey&rft.aulast=Buscheck&rft.aufirst=Thomas&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 - Teleseismic detection and location with an array of arrays T2 - 47th American Geophysical Union Fall Meeting AN - 1651740578; 6330692 JF - 47th American Geophysical Union Fall Meeting AU - Ford, Sean AU - Hauk, Teresa 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/1651740578?accountid=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=Teleseismic+detection+and+location+with+an+array+of+arrays&rft.au=Ford%2C+Sean%3BHauk%2C+Teresa&rft.aulast=Ford&rft.aufirst=Sean&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 - Giving peeps to my props: Using 3D printing to shed new light on particle transport in fractured rock T2 - 47th American Geophysical Union Fall Meeting AN - 1651740487; 6330559 JF - 47th American Geophysical Union Fall Meeting AU - Walsh, Stuart AU - Du Frane, Wyatt AU - Vericella, John AU - Aines, Roger Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Printing KW - Fractures KW - Sediment transport KW - Particulates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740487?accountid=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=Giving+peeps+to+my+props%3A+Using+3D+printing+to+shed+new+light+on+particle+transport+in+fractured+rock&rft.au=Walsh%2C+Stuart%3BDu+Frane%2C+Wyatt%3BVericella%2C+John%3BAines%2C+Roger&rft.aulast=Walsh&rft.aufirst=Stuart&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 Extracellular Matrix in Photosynthetic Mats: A Cyanobacterial Gingerbread House T2 - 47th American Geophysical Union Fall Meeting AN - 1651738668; 6329045 JF - 47th American Geophysical Union Fall Meeting AU - Stuart, Rhona AU - Stannard, Whitney AU - Bebout, Brad AU - Pett-Ridge, Jennifer AU - Mayali, Xavier AU - Weber, Peter AU - Lipton, Mary AU - Lee, Jackson AU - Everroad, R AU - Thelen, Michael Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Photosynthesis KW - Housing KW - Extracellular matrix KW - Residential areas KW - Phytoplankton UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738668?accountid=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+Extracellular+Matrix+in+Photosynthetic+Mats%3A+A+Cyanobacterial+Gingerbread+House&rft.au=Stuart%2C+Rhona%3BStannard%2C+Whitney%3BBebout%2C+Brad%3BPett-Ridge%2C+Jennifer%3BMayali%2C+Xavier%3BWeber%2C+Peter%3BLipton%2C+Mary%3BLee%2C+Jackson%3BEverroad%2C+R%3BThelen%2C+Michael&rft.aulast=Stuart&rft.aufirst=Rhona&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 - Superposition well-test method for reservoir characterization and pressure management during CO2 injection T2 - 47th American Geophysical Union Fall Meeting AN - 1651738617; 6328376 JF - 47th American Geophysical Union Fall Meeting AU - White, Joshua Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Reservoir KW - Pressure KW - Carbon dioxide KW - Reservoirs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738617?accountid=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=Superposition+well-test+method+for+reservoir+characterization+and+pressure+management+during+CO2+injection&rft.au=White%2C+Joshua&rft.aulast=White&rft.aufirst=Joshua&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 - Geostatistical Analysis of Tritium, 3H/3He Age and Noble Gas Derived Parameters in California Groundwater T2 - 47th American Geophysical Union Fall Meeting AN - 1651738585; 6329127 JF - 47th American Geophysical Union Fall Meeting AU - Visser, Ate Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Rare gases KW - Age KW - Tritium KW - Ground water KW - USA, California UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738585?accountid=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=Geostatistical+Analysis+of+Tritium%2C+3H%2F3He+Age+and+Noble+Gas+Derived+Parameters+in+California+Groundwater&rft.au=Visser%2C+Ate&rft.aulast=Visser&rft.aufirst=Ate&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 - Microseismic Techniques for Detecting Induced Seismicity Hazard T2 - 47th American Geophysical Union Fall Meeting AN - 1651737666; 6334802 JF - 47th American Geophysical Union Fall Meeting AU - Matzel, Eric Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Hazards UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737666?accountid=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=Microseismic+Techniques+for+Detecting+Induced+Seismicity+Hazard&rft.au=Matzel%2C+Eric&rft.aulast=Matzel&rft.aufirst=Eric&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 - Towards a better understanding of shallow convection over land using ground-based observation and large-eddy simulation T2 - 47th American Geophysical Union Fall Meeting AN - 1651737529; 6329972 JF - 47th American Geophysical Union Fall Meeting AU - Zhang, Yunyan AU - Klein, Stephen Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Convection KW - Simulation KW - Oceanic eddies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737529?accountid=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=Towards+a+better+understanding+of+shallow+convection+over+land+using+ground-based+observation+and+large-eddy+simulation&rft.au=Zhang%2C+Yunyan%3BKlein%2C+Stephen&rft.aulast=Zhang&rft.aufirst=Yunyan&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 - Seismic Simulations of the August 24, 2014 South Napa and Nearby Earthquakes to Investigate the Effects of Rupture Details and Three-Dimensional Structure on Ground Motions and Static Displacements T2 - 47th American Geophysical Union Fall Meeting AN - 1651737520; 6330052 JF - 47th American Geophysical Union Fall Meeting AU - Rodgers, Arthur AU - Dreger, Douglas AU - Pitarka, Arben AU - Petersson, Anders AU - Johanson, Ingrid Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Earthquakes KW - Ground motion KW - Seismic activity KW - Rupture KW - Simulation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737520?accountid=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=Seismic+Simulations+of+the+August+24%2C+2014+South+Napa+and+Nearby+Earthquakes+to+Investigate+the+Effects+of+Rupture+Details+and+Three-Dimensional+Structure+on+Ground+Motions+and+Static+Displacements&rft.au=Rodgers%2C+Arthur%3BDreger%2C+Douglas%3BPitarka%2C+Arben%3BPetersson%2C+Anders%3BJohanson%2C+Ingrid&rft.aulast=Rodgers&rft.aufirst=Arthur&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 - Mapping Soil Carbon from Cradle to Grave: 'Omic and Isotope Based Measurements of Root C Transformations T2 - 47th American Geophysical Union Fall Meeting AN - 1651737506; 6329366 JF - 47th American Geophysical Union Fall Meeting AU - Pett-Ridge, Jennifer AU - Nuccio, Erin AU - Shi, Shengjing AU - Neurath, Rachel AU - Brodie, Eoin AU - Zhou, Jizhong AU - Lipton, Mary AU - Herman, Donald AU - Firestone, Mary Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Transformation KW - Soil KW - Isotopes KW - Carbon KW - Roots KW - Mapping UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737506?accountid=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=Mapping+Soil+Carbon+from+Cradle+to+Grave%3A+%27Omic+and+Isotope+Based+Measurements+of+Root+C+Transformations&rft.au=Pett-Ridge%2C+Jennifer%3BNuccio%2C+Erin%3BShi%2C+Shengjing%3BNeurath%2C+Rachel%3BBrodie%2C+Eoin%3BZhou%2C+Jizhong%3BLipton%2C+Mary%3BHerman%2C+Donald%3BFirestone%2C+Mary&rft.aulast=Pett-Ridge&rft.aufirst=Jennifer&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 General Uncertainty Quantification Methodology for Cloud Microphysical Property Retrievals T2 - 47th American Geophysical Union Fall Meeting AN - 1651737326; 6329907 JF - 47th American Geophysical Union Fall Meeting AU - Tang, Qi AU - Xie, Shaocheng AU - Chen, Xiao AU - Zhao, Chuanfeng Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Clouds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737326?accountid=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+General+Uncertainty+Quantification+Methodology+for+Cloud+Microphysical+Property+Retrievals&rft.au=Tang%2C+Qi%3BXie%2C+Shaocheng%3BChen%2C+Xiao%3BZhao%2C+Chuanfeng&rft.aulast=Tang&rft.aufirst=Qi&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 - High Pressure Hydrogen from First Principles T2 - 47th American Geophysical Union Fall Meeting AN - 1651736620; 6328421 JF - 47th American Geophysical Union Fall Meeting AU - Morales, Miguel Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Hydrogen KW - Pressure UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651736620?accountid=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=High+Pressure+Hydrogen+from+First+Principles&rft.au=Morales%2C+Miguel&rft.aulast=Morales&rft.aufirst=Miguel&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 - Exotic behavior of matter in the deep interiors of exoplanets T2 - 47th American Geophysical Union Fall Meeting AN - 1651736480; 6328428 JF - 47th American Geophysical Union Fall Meeting AU - Collins, Gilbert AU - Millot, Marius AU - Eggert, Jon AU - Smith, Raymond AU - Rygg, J AU - Lazicki, Amy AU - Coppari, Federica AU - Fratanduoo, Dayne AU - Ping, Yuan AU - Swift, Damian AU - Celliers, Peter AU - Kraus, Richard AU - Braun, David AU - Panella, Amalia AU - Hamel, Sebastien AU - Doeppner, TIlo AU - Kritcher, Andrea AU - Benedict, Lorin AU - Rudd, Robert AU - Jeanloz, Raymond AU - Bolme, Cynthia AU - Gleason, Arianna AU - Loubeyre, Paul AU - Brygoo, Stephanie AU - McMahon, Malcolm 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/1651736480?accountid=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=Exotic+behavior+of+matter+in+the+deep+interiors+of+exoplanets&rft.au=Collins%2C+Gilbert%3BMillot%2C+Marius%3BEggert%2C+Jon%3BSmith%2C+Raymond%3BRygg%2C+J%3BLazicki%2C+Amy%3BCoppari%2C+Federica%3BFratanduoo%2C+Dayne%3BPing%2C+Yuan%3BSwift%2C+Damian%3BCelliers%2C+Peter%3BKraus%2C+Richard%3BBraun%2C+David%3BPanella%2C+Amalia%3BHamel%2C+Sebastien%3BDoeppner%2C+TIlo%3BKritcher%2C+Andrea%3BBenedict%2C+Lorin%3BRudd%2C+Robert%3BJeanloz%2C+Raymond%3BBolme%2C+Cynthia%3BGleason%2C+Arianna%3BLoubeyre%2C+Paul%3BBrygoo%2C+Stephanie%3BMcMahon%2C+Malcolm&rft.aulast=Collins&rft.aufirst=Gilbert&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 - Geochemistry of fast-spreading lower oceanic crust; results from drilling at the Hess Deep Rift (ODP Leg 147 and IODP Expedition 345; East Pacific Rise) AN - 1780802074; 2015-088473 AB - The Hess Deep Rift, where the Cocos Nazca Ridge propagates into the young, fast-spread East Pacific Rise crust, exposes a dismembered, but nearly complete, lower crustal section. The extensive exposures of the plutonic crust were drilled at 3 sites during ODP Leg 147 (Nov. 1992-Jan. 1993) and IODP Expedition 345 (Dec. 2012-Feb. 2013). We report preliminary results of a bulk rock geochemical study (major and trace elements) carried out on 109 samples representative of the different drilled lithologies. The shallowest gabbroic rocks were sampled at ODP Site 894. They comprise gabbronorite, gabbro, olivine gabbro and gabbronorite. They have evolved compositions with Mg# 39-55, Yb 4-8 x chondrite and Eu/Eu* 1-1.6. Olivine gabbro and troctolite were dominant at IODP Site U1415, with minor gabbro, gabbronorite and clinopyroxene oikocryst-bearing troctolite and gabbro. All U1415 gabbroic rocks have primitive compositions except for one gabbronorite rubble that is similar in composition to the shallow gabbros. Olivine gabbro, gabbro and gabbronorite overlap in composition: they have high Mg# (79-87) and Ni (130-570 ppm), low TiO (sub 2) (0.1-0.3 wt.%) and Yb (1.3-2.3 x chondrite) and positive Eu anomaly (Eu/Eu*=1.9-2.7). Troctolite has high Mg# (81-89), Ni (260-1500 ppm) and low TiO (sub 2) (4). ODP Site 895 recovered sequences of highly depleted harzburgite, dunite and troctolite (Yb down to <0.1xchondrite) that are interpreted as a mantle-crust transition zone. Basalts were recovered at Sites 894 and U1415: they have low Yb (0.5-0.9xN6MORB) and are depleted in the most incompatible elements (Ce/Yb=0.6-0.9xN-MORB). The main geochemical characteristics of Site U1415 and 894 gabbroic rocks are consistent with formation as a cumulate sequence from a common parental MORB melt; troctolites are the most primitive end-member of this sequence. They overlap in composition with the most primitive of slow and fast spread crust gabbroic rocks. JF - American Geophysical Union Fall Meeting AU - Godard, Marguerite AU - Falloon, Trevor AU - Gillis, K M AU - Akizawa, Nori AU - de Brito Adriao, A AU - Koepke, J AU - Marks, N AU - Meyer, R AU - Saha, A AU - Garbe-Schoenberg, C D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract V22A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - oceanic crust KW - East Pacific KW - Northeast Pacific KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - North Pacific KW - Pacific Ocean KW - sea-floor spreading KW - Hess Deep KW - Expedition 345 KW - Ocean Drilling Program KW - Leg 147 KW - chemical composition KW - geochemistry KW - crust KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780802074?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geochemistry+of+fast-spreading+lower+oceanic+crust%3B+results+from+drilling+at+the+Hess+Deep+Rift+%28ODP+Leg+147+and+IODP+Expedition+345%3B+East+Pacific+Rise%29&rft.au=Godard%2C+Marguerite%3BFalloon%2C+Trevor%3BGillis%2C+K+M%3BAkizawa%2C+Nori%3Bde+Brito+Adriao%2C+A%3BKoepke%2C+J%3BMarks%2C+N%3BMeyer%2C+R%3BSaha%2C+A%3BGarbe-Schoenberg%2C+C+D%3BAnonymous&rft.aulast=Godard&rft.aufirst=Marguerite&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 - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2016-04-14 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - chemical composition; crust; East Pacific; Equatorial Pacific; Expedition 345; geochemistry; Hess Deep; Integrated Ocean Drilling Program; Leg 147; North Pacific; Northeast Pacific; Ocean Drilling Program; oceanic crust; Pacific Ocean; sea-floor spreading ER - TY - JOUR T1 - Reexamination of lunar exospheric dust estimates using discrete dipole scattering simulations AN - 1769967977; 2016-017858 AB - Analysis of Apollo regolith samples showed that lunar dust grains consist of a diverse set of shapes. Consequently, the optical scattering properties of these grains will differ from those predicted using the Mie approximation, which strictly applies only for spheres. Because it is analytically convenient and without shape ambiguity, Mie theory has been used routinely to estimate the concentration of dust or its upper limits in the lunar exosphere from brightness measurements acquired during orbital dust searches. Utilizing the Discrete Dipole Approximation (DDA), we have computed a more realistic set of scattering parameters for a collection of sub-micron grain shapes that represents the ultra-fine fraction of lunar soil. Included in this suite are spheroids (oblate and prolate) and irregular geometries resembling isolated grains observed in Apollo samples. A subset of these models includes the addition of nanophase iron, in order to examine the influence of space weathering. Wavelength coverage of the DDA scattering computations extends from far-UV to near-IR. This range is diagnostic of grain size and shape, since scattering efficiency depends on both of these parameters. This collection of grain scattering models is used, together with an observing simulation code, to reexamine some prior estimates of exospheric dust concentration derived from Apollo-era limb brightness measurements (e.g., Apollo 15 coronal photography), as well as the subsequent Clementine star tracker search and a search for lunar horizon glow by LRO Lyman Alpha Mapping Project (LAMP). We compare our revised estimates of exospheric dust abundance with the results of these previous dust searches. JF - American Geophysical Union Fall Meeting AU - Stubbs, T J AU - Glenar, D A AU - Richard, D T AU - Feldman, P D AU - Retherford, K D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23C EP - 4007 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/1769967977?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reexamination+of+lunar+exospheric+dust+estimates+using+discrete+dipole+scattering+simulations&rft.au=Stubbs%2C+T+J%3BGlenar%2C+D+A%3BRichard%2C+D+T%3BFeldman%2C+P+D%3BRetherford%2C+K+D%3BAnonymous&rft.aulast=Stubbs&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 - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Destruction and re-accretion of mid-size moons during an outer solar system late heavy bombardment AN - 1769967935; 2016-018019 AB - To explain the lunar Late Heavy Bombardment the Nice Model (Tsiganis, K., Gomes, R., Morbidelli, A., & Levison, H. 2005, Nature, 435, 459; Tsiganis, K., Gomes, R., Morbidelli, A., & Levison, H. 2005, Nature, 435, 459) invokes a period of dynamical instability, occurring long after planet formation, that destabilizes both the main asteroid belt and a remnant exterior planetesimal disk. As a side effect of explaining the lunar LHB, this model also predicts an LHB-like period in the outer Solar System. With higher collision probabilities and impact energies due to gravitational focusing by the giant planets the inner satellites of Jupiter, Saturn, and Uranus would have experienced a bombardment much more severe than the one supposedly responsible for the lunar basins. The concern is that such bombardment should have resulted in significant, even catastrophic modification of the mid-size satellites. Here we look at the problem of satellite survival during a hypothetical outer Solar System LHB. Using a Monte-Carlo approach we calculate, for 10 satellites of Saturn and Uranus, the probability of having experienced at least one catastrophic collision during an LHB. We use a scaling law for the energy required to disrupt a target in a gravity-dominated collision derived from new SPH simulations. These simulations extend the scaling law previously obtained by Benz & Asphaug (1999, Icarus, 142, 5) to larger targets. We then simulate randomized LHB impacts by drawing from appropriate size and velocity distributions, with the total delivered mass as a controlled parameter. We find that Mimas, Enceladus, Tethys, Hyperion, and Miranda experience at least one catastrophic impact in every simulation. In most simulations, Mimas, Enceladus, and Tethys experience multiple catastrophic impacts, including impacts with energies several times that required to completely disrupt the target. The implication is that these close-in, mid-size satellites could not have survived a Late Heavy Bombardment unmodified, unless the mass delivered to the outer Solar System was at least 30 times less that the value predicted by the Nice Model, or 10 times less than the reduced value more recently suggested by Dones & Levison (2013, in 44th Lunar Planet. Sci. Conf.). JF - American Geophysical Union Fall Meeting AU - Movshovitz, N AU - Nimmo, F AU - Korycansky, D G AU - Asphaug, E I AU - Owen, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43B EP - 3991 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/1769967935?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Destruction+and+re-accretion+of+mid-size+moons+during+an+outer+solar+system+late+heavy+bombardment&rft.au=Movshovitz%2C+N%3BNimmo%2C+F%3BKorycansky%2C+D+G%3BAsphaug%2C+E+I%3BOwen%2C+M%3BAnonymous&rft.aulast=Movshovitz&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 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 - Deep-water carbonate ion shifts during the last glacial termination in the Bay of Plenty, New Zealand AN - 1769964447; 2016-020547 AB - It has been suggested that a greater amount of CO2 was stored in the deep sea during glacial periods via changes in biologic pump efficiency and increased uptake by a more alkaline ocean, characterized by carbonate ion concentrations higher than today. Reconstructing past ocean carbonate ion will enable better quantification of the relative roles of different CO2 storage mechanisms. Here, we present records of deep water carbonate chemistry since the Last Glacial Maximum derived from sediment cores located in New Zealand's Bay of Plenty. Today, Bay of Plenty mid- to deep waters consist of a relatively fresh Antarctic Intermediate Water overlying southern-sourced Circumpolar Deep Water, which in turn is underlain by CO2-enriched deep water, partially derived from the North Pacific. We reconstruct past changes in bottom water carbonate chemistry from the trace element and stable isotopic composition recorded in shells of the epibenthic foraminifer Cibicidoides wuellerstorfi. The boron to calcium ratio (B/Ca) in these shells indicates that during the last glacial maximum (LGM), deep water Delta CO32- was slightly less than the modern value of approximately 20 mu mol/kg. When combined with shifts in carbon isotopes, these results imply changes in respired CO2 storage, with low-Delta CO32-, low-delta 13C waters dominating during the LGM and higher-Delta CO32-, higher-delta 13C waters prevailing in the Holocene. During the transition between LGM and Holocene, Delta CO32- shifts rapidly in the mid-depth record ( approximately 1,600 m), rising from approximately 5 mu mol/kg at about 18 ka to a peak of 30 mu mol/kg at 16 ka. To determine whether these sharp changes are due to vertical shifts in water mass boundaries or rapid changes in source water formation regions, shallower and deeper cores ( approximately 1,200 m and approximately 3,000 m) from the same region are also being evaluated. JF - American Geophysical Union Fall Meeting AU - Allen, K A AU - Sikes, E L AU - Elmore, A AU - Hoenisch, B AU - Guilderson, T P AU - Cook, M S AU - Rosenthal, Y AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP53B EP - 1221 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/1769964447?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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-water+carbonate+ion+shifts+during+the+last+glacial+termination+in+the+Bay+of+Plenty%2C+New+Zealand&rft.au=Allen%2C+K+A%3BSikes%2C+E+L%3BElmore%2C+A%3BHoenisch%2C+B%3BGuilderson%2C+T+P%3BCook%2C+M+S%3BRosenthal%2C+Y%3BAnonymous&rft.aulast=Allen&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 - Impact delivery of water at the Moon and Mercury AN - 1769963478; 2016-018034 AB - Cometary and asteroidal impacts at Mercury and the Moon likely supply some fraction of these bodies' near-surface reservoirs of water ice. At Mercury, MESSENGER spacecraft observations of permanently shadowed regions revealed bright and dark deposits, interpreted as comet- or asteroid-derived water and organics [1]. At the Moon, excavation of a permanently shadowed crater by the LCROSS mission confirmed the presence of substantial ( approximately 5 wt%) near-surface water [2]. Geophysical models of water delivery set limits on the relative roles of larger episodic events and ongoing micrometeorite impacts, assisting in both the interpretation of available data and the refinement of future geophysical strategies to characterize near-surface volatiles. Determining to what extent comets and asteroids have contributed to the near-surface water detected at each body depends upon both the impact flux and the efficiency of impact delivery. Here we present new insights on delivery efficiency from simulations of impacts using the CTH shock physics code. Integrating these results with current estimates for the impact fluxes at the Moon and Mercury provides a more complete understanding of exogenous water sources. While prior analytical and numerical work has treated aspects of this problem, the effects of parameters such as impact angle and porosity have not yet been characterized in detail. We find that, while the inclusion of target porosity increases water retention, impactor porosity reduces delivery efficiency. Fully 3-D simulations document decreased delivery efficiency with increasing impact angle obliquity. In addition, post-impact evolution of projectile material differs fundamentally between icy, cometary impactors and silicate, asteroidal impactors. Our calculations implement a variety of material types, probing the dependence of impact delivery on the projectile's equation of state. The combined effects of impact angle, velocity, material models, and impactor flux demonstrate key differences in volatile delivery mechanisms at Mercury and the Moon. [1] Neumann et al., 2013. Science 339, 296-300. [2] Colaprete et al., 2010. Science 330, 463-468. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Bruck Syal, M AU - Schultz, P H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51C EP - 3960 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/1769963478?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+delivery+of+water+at+the+Moon+and+Mercury&rft.au=Bruck+Syal%2C+M%3BSchultz%2C+P+H%3BAnonymous&rft.aulast=Bruck+Syal&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 - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Monitoring a pilot CO (sub 2) injection experiment in a shallow aquifer using 3D cross-well electrical resistance tomography AN - 1769963423; 2016-018287 AB - Three dimensional electrical resistance tomography (ERT) was used to monitor a pilot CO2 injection experiment at Vrogum, Denmark. The purpose was to evaluate the effectiveness of the ERT method for monitoring the two opposing effects from gas-phase and dissolved CO2 in a shallow unconfined siliciclastic aquifer. Dissolved CO2 increases water electrical conductivity (EC) while gas phase CO2 reduce EC. We injected 45 kg of CO2 into a shallow aquifer for 48 hours. ERT data were collected for 50 hours following CO2 injection. Four ERT monitoring boreholes were installed on a 5 m by 5 m square grid and each borehole had 24 electrodes at 0.5 m electrode spacing at depths from 1.5 m to 13 m. ERT data were inverted using a difference inversion algorithm for bulk EC. 3D ERT successfully detected the CO2 plume distribution and growth in the shallow aquifer. We found that the changes of bulk EC were dominantly positive following CO2 injection, indicating that the effect of dissolved CO2 overwhelmed that of gas phase CO2. The pre-injection baseline resistivity model clearly showed a three-layer structure of the site. The electrically more conductive glacial sand layer in the northeast region are likely more permeable than the overburden and underburden and CO2 plumes were actually confined in this layer. Temporal bulk EC increase from ERT agreed well with water EC and cross-borehole ground penetrating radar data. ERT monitoring offers a competitive advantage over water sampling and GPR methods because it provides 3D high-resolution temporal tomographic images of CO2 distribution and it can also be automated for unattended operation. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. Lawrence Livermore National Security, LLC. LLNL IM release#: LLNL-PROC-657944. JF - American Geophysical Union Fall Meeting AU - Yang, X AU - Lassen, R N AU - Looms, M C AU - Jensen, K H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S31A EP - 4374 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/1769963423?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Monitoring+a+pilot+CO+%28sub+2%29+injection+experiment+in+a+shallow+aquifer+using+3D+cross-well+electrical+resistance+tomography&rft.au=Yang%2C+X%3BLassen%2C+R+N%3BLooms%2C+M+C%3BJensen%2C+K+H%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 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 - Stabilization of desert surfaces and accumulation of dust under biological soil crusts AN - 1765881201; 2016-013875 AB - Biological soil crusts (BSC) are known to play a critical role in the stabilization of desert surfaces by helping to protect sediment from wind and water erosion and aiding in the trapping of airborne particles. The crusts are often composed of cyanobacteria, algae, and fungi, and occupy the upper few cm of a soil. Due to their high tolerance of desiccation and ability to utilize fog and dew sources, BSC are able to exist in environments that may otherwise be too dry for vascular plants. In the hyperarid Atacama Desert, decades or more between measurable precipitation events has created a landscape devoid of macroscopic life. While precipitation is rare, coastal fog occurs regularly and microbial communities capable of utilizing fog and dew water are able to persist. Here we found cyanobacteria and lichen living in association with a thin sulfate and dust crust ( approximately 2 cm) covering the surface of "dust plateaus". Topographically the region is highly irregular and part of a largely erosional landscape. We hypothesized that these flat-topped plateaus are accretionary features that have been able to maintain dust accumulation for thousands of years as a result of the surface crusts. To test this hypothesis we conducted radiocarbon analysis of crusts and soil profiles at two sites approximately 30 km apart, one in a high fog zone and another in lower fog frequency zone. The radiocarbon analysis shows that sediment has been accumulating in the "plateaus" for the past 15,000 years and that biological activity and rates of C cycling in the crust increase with increasing fog frequency and intensity. The ages of organic material in the dust decrease monotonically with decreasing soil thickness, suggestive of progressive upward growth by dust accumulation. Our data indicate that the BSC are capable of surviving in hyperarid the Atacama Desert, a Mars analog, through the utilization of fog water, and that their presence can leave a visible geomorphic imprint on the landscape. JF - American Geophysical Union Fall Meeting AU - Finstad, Kari M AU - McNicol, G AU - Pfeiffer, M AU - Amundson, R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21D EP - 3957 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/1765881201?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stabilization+of+desert+surfaces+and+accumulation+of+dust+under+biological+soil+crusts&rft.au=Finstad%2C+Kari+M%3BMcNicol%2C+G%3BPfeiffer%2C+M%3BAmundson%2C+R%3BAnonymous&rft.aulast=Finstad&rft.aufirst=Kari&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 - LLNL-G3D-JPS; global-scale joint tomography of P and S wave speeds in the crust and mantle AN - 1765877272; 2016-012268 AB - We have combined a number of advanced techniques to construct a new global seismic tomography image of the Earth's crust and mantle (LLNL-G3D-JPS). The image is produced via joint inversion of approximately 3 million high-quality arrival times for regional and teleseismic P and S waves including P, pP, pwP, Pn, Pg, Pb, PcP, S, sS, Sn, SS, ScS, SKS, and SKKS. The advanced techniques employed include a Bayesian global multiple-event relocation process (Bayesloc), 3-D ray tracing with multipath and mini-max phase considerations, and a multi-resolution inversion technique that exploits spherical tessellation hierarchies (called PMTI). The model consists of approximately 1.7 million model nodes and undulating structures are explicitly represented including 7 crustal units, the Moho, and the upper mantle phase transition boundaries. Although the image was produced primarily for accurate prediction of travel times for seismic event location applications, it also provides a valuable new image with key features important for understanding mantle evolution. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-658071 JF - American Geophysical Union Fall Meeting AU - Simmons, N A AU - Myers, S AU - Johannesson, G AU - Matzel, E AU - Grand, Steve P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S33A EP - 4496 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/1765877272?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=LLNL-G3D-JPS%3B+global-scale+joint+tomography+of+P+and+S+wave+speeds+in+the+crust+and+mantle&rft.au=Simmons%2C+N+A%3BMyers%2C+S%3BJohannesson%2C+G%3BMatzel%2C+E%3BGrand%2C+Steve+P%3BAnonymous&rft.aulast=Simmons&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 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 - Bayesian nitrate source apportionment to individual groundwater wells in the Central Valley by use of nitrogen, oxygen, and boron isotopic tracers AN - 1765873987; 2016-011641 AB - Groundwater quality is a concern in alluvial aquifers underlying agricultural areas worldwide, an example of which is the San Joaquin Valley, California. Nitrate from land applied fertilizers or from animal waste can leach to groundwater and contaminate drinking water resources. Dairy manure and synthetic fertilizers are the major sources of nitrate in groundwater in the San Joaquin Valley, however, septic waste can be a major source in some areas. As in other such regions around the world, the rural population in the San Joaquin Valley relies almost exclusively on shallow domestic wells (< or =150 m deep), of which many have been affected by nitrate. Consumption of water containing nitrate above the drinking water limit has been linked to major health effects including low blood oxygen in infants and certain cancers. Knowledge of the proportion of each of the three main nitrate sources (manure, synthetic fertilizer, and septic waste) contributing to individual well nitrate can aid future regulatory decisions. Nitrogen, oxygen, and boron isotopes can be used as tracers to differentiate between the three main nitrate sources. Mixing models quantify the proportional contributions of sources to a mixture by using the concentration of conservative tracers within each source as a source signature. Deterministic mixing models are common, but do not allow for variability in the tracer source concentration or overlap of tracer concentrations between sources. Bayesian statistics used in conjunction with mixing models can incorporate variability in the source signature. We developed a Bayesian mixing model on a pilot network of 32 private domestic wells in the San Joaquin Valley for which nitrate as well as nitrogen, oxygen, and boron isotopes were measured. Probability distributions for nitrogen, oxygen, and boron isotope source signatures for manure, fertilizer, and septic waste were compiled from the literature and from a previous groundwater monitoring project on several dairies in the San Joaquin Valley. Median percent contribution of nitrate to wells from fertilizer, manure, and septic waste generally match the expected source based on land use patterns, with some exceptions. JF - American Geophysical Union Fall Meeting AU - Lockhart, K AU - Harter, T AU - Grote, M AU - Young, M B AU - Eppich, G AU - Deinhart, A AU - Wimpenny, J AU - Yin, Q Z AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11A EP - 0858 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/1765873987?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Bayesian+nitrate+source+apportionment+to+individual+groundwater+wells+in+the+Central+Valley+by+use+of+nitrogen%2C+oxygen%2C+and+boron+isotopic+tracers&rft.au=Lockhart%2C+K%3BHarter%2C+T%3BGrote%2C+M%3BYoung%2C+M+B%3BEppich%2C+G%3BDeinhart%2C+A%3BWimpenny%2C+J%3BYin%2C+Q+Z%3BAnonymous&rft.aulast=Lockhart&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 - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Comparison of heterogeneously-propped hydraulic fractures for vertical and lateral wells AN - 1765873630; 2016-011865 AB - Heterogeneous proppant placement (HPP) technologies offer improved hydraulic fracturing performance through the creation of channels within propped fractures (see figure). Such schemes, however, can suffer from reduced performance due to uncertainty in reservoir properties (e.g.: embedment and moduli). This is particularly true of unconventional reservoirs where properties can be highly heterogeneous. We demonstrate that the mechanisms controlling uncertainty in HPP performance differ between vertical and lateral wells. For computational efficiency, we combine the boundary element method to simulate formation deformation with a detailed discretization of the proppant within the fracture to predict conductivity of the HPP channels. We performed an extensive parameter study with thousands of scenarios relevant to HPP, including placement geometries consistent with both vertical and lateral wells. Global sensitivity analysis (GSA) was then applied to quantify and rank contributions from uncertain input parameters to variance in fracture conductivity. We were able to rigorously quantify the impact of parametric uncertainty. We found that for lateral wells the uncertainty in the conductivity is dominated by the uncertainty in diffusion of the proppant. For vertical wells, the dominant factors causing uncertainty in the performance change with stress. At low stress, performance is controlled by factors that dictate pillar geometry. At high stress, parameters that help preserve channels against closure stress control conductivity. Our results highlight the robustness of the HPP concept and quantify the sources of uncertainty in HPP performance. Further, we can clearly identify the fundamental parameters that control HPP conductivity and reveal that they are different for wellbore geometries that are typical of unconventional wells in North America. This implies that optimal HPP strategies will differ between vertical and lateral wells. JF - American Geophysical Union Fall Meeting AU - Morris, Joe AU - Chugunov, N AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H51Q EP - 05 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873630?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+heterogeneously-propped+hydraulic+fractures+for+vertical+and+lateral+wells&rft.au=Morris%2C+Joe%3BChugunov%2C+N%3BAnonymous&rft.aulast=Morris&rft.aufirst=Joe&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 - Teleseismic detection and location with an array of arrays AN - 1765873422; 2016-012147 AB - Short-period teleseismic array beams are combined using global velocity model derived static corrections for a proposed event location and origin time. Coherent energy is preserved and the true event signal is amplified when the proposed event location and origin time are correct. The method is demonstrated for the 2006 DPRK explosion. JF - American Geophysical Union Fall Meeting AU - Ford, S R AU - Hauk, T F AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S14B 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/1765873422?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Teleseismic+detection+and+location+with+an+array+of+arrays&rft.au=Ford%2C+S+R%3BHauk%2C+T+F%3BAnonymous&rft.aulast=Ford&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 - Seismic simulations of the august 24, 2014 South Napa and nearby earthquakes to investigate the effects of rupture details and three-dimensional structure on ground motions and static displacements AN - 1765873353; 2016-012220 AB - We performed three-dimensional (3D) anelastic finite difference simulations to investigate the effects of rupture details and sub-surface structure (including surface topography) on motions for the August 24, 2014 South Napa M6.0 earthquake, its aftershocks and nearby earthquakes. We compared observed seismic ground motions and static displacements (from GPS and InSAR) with motions computed with 3D simulations. Calculations were performed with the SW4 finite difference code, which computes the transient motions and permanent displacements including the effects of 3D structure based on the USGS San Francisco Bay Area 3D model (version USGSBayAreaVM-08.3.0.etree) and surface topography. We investigated the response using both an average plane-layered (one-dimensional, 1D) and the USGS 3D structure. We computed motions for available models of the mainshock rupture (including the model reported by Dreger, 2014 from broadband seismic waveforms). To unravel the effects of earthquake rupture and propagation through complex 3D structure, we modeled both the M6 mainshock and smaller (M3-4) nearby events, which can be represented as simple point moment tensor sources. The computed ground motions were compared to observations. For the seismic ground motions, the simulated motions with the 3D model (up to 1 Hz) produce remarkably better fits to the data than the average 1D model, suggesting there are significant path effects due to sedimentary basins and other sub-surface features. Aftershocks are well modeled for most paths, including paths crossing sedimentary basin structures in the Napa Valley and San Pablo Bay, indicating that the USGS 3D model can reasonably predict complex path effects. The M6.0 South Napa mainshock ruptured toward the north and resulted in complex high-frequency response in the backward directivity direction to the south, which we have not yet been able to reproduce with simulations and may require addition of finer details in the rupture model. Preliminary comparisons of simulations with geodetic displacements reported from GPS data suggest 3D structure slightly alters directions and amplitudes of displacements. We will attempt to model the geodetic displacements reported from both GPS and InSAR data. JF - American Geophysical Union Fall Meeting AU - Rodgers, A J AU - Dreger, D S AU - Pitarka, A AU - Petersson, A AU - Johanson, Ingrid A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S31G EP - 07 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873353?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+simulations+of+the+august+24%2C+2014+South+Napa+and+nearby+earthquakes+to+investigate+the+effects+of+rupture+details+and+three-dimensional+structure+on+ground+motions+and+static+displacements&rft.au=Rodgers%2C+A+J%3BDreger%2C+D+S%3BPitarka%2C+A%3BPetersson%2C+A%3BJohanson%2C+Ingrid+A%3BAnonymous&rft.aulast=Rodgers&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 - Geostatistical analysis of tritium, (super 3) H/ (super 3) He age and noble gas derived parameters in California groundwater AN - 1752577935; 2016-001212 AB - Key characteristics of California groundwater systems related to aquifer vulnerability, sustainability, recharge locations and mechanisms, and anthropogenic impact on recharge, are revealed in a spatial geostatistical analysis of the data set of tritium, dissolved noble gas and helium isotope analyses collected for the California State Water Resources Control Board's Groundwater Ambient Monitoring and Assessment (GAMA) and California Aquifer Susceptibility (CAS) programs. Over 4,000 tritium and noble gas analyses are available from wells across California. 25% of the analyzed samples contained less than 1 pCi/L indicating recharge occurred before 1950. The correlation length of tritium concentration is 120 km. Nearly 50% of the wells show a significant component of terrigenic helium. Over 50% of these samples show a terrigenic helium isotope ratio (Rter) that is significantly higher than the radiogenic helium isotope ratio (Rrad=2X10-8). Rter values of more than three times the atmospheric isotope ratio (Ra=1.384X10-6) are associated with known faults and volcanic provinces in Northern California. In the Central Valley, Rter varies from radiogenic to 2.25 Ra, complicating 3H/3He dating. The Rter was mapped by kriging, showing a correlation length of less than 50 km. The local predicted Rter was used to separate tritiogenic from atmospheric and terrigenic 3He. Regional groundwater recharge areas, indicated by young groundwater ages, are located in the southern Santa Clara Basin and in the upper LA basin and in the eastern San Joaquin Valley and along unlined canals carrying Colorado River water. Recharge in California is dominated by agricultural return flows, river recharge and managed aquifer recharge rather than precipitation excess. Combined application of noble gases and other groundwater tracers reveal the impact of engineered groundwater recharge and prove invaluable for the study of complex groundwater systems. This work was performed under the auspices of the U.S. DOE by LLNL under Contract DE-AC52-07NA27344. LLNL-ABS-658313 JF - American Geophysical Union Fall Meeting AU - Visser, A AU - Singleton, M J AU - Moran, Jean E AU - Fram, M S AU - Kulongoski, J T AU - Esser, B K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H21L EP - 08 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577935?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geostatistical+analysis+of+tritium%2C+%28super+3%29+H%2F+%28super+3%29+He+age+and+noble+gas+derived+parameters+in+California+groundwater&rft.au=Visser%2C+A%3BSingleton%2C+M+J%3BMoran%2C+Jean+E%3BFram%2C+M+S%3BKulongoski%2C+J+T%3BEsser%2C+B+K%3BAnonymous&rft.aulast=Visser&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 - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Use of a stochastic joint inversion modeling algorithm to develop a hydrothermal flow model at a geothermal prospect AN - 1752576812; 2016-001226 AB - A stochastic joint inverse algorithm is used to analyze diverse geophysical and hydrologic data associated with a geothermal prospect. The approach uses a Markov Chain Monte Carlo (MCMC) global search algorithm to develop an ensemble of hydrothermal groundwater flow models that are most consistent with the observations. The algorithm utilizes an initial conceptual model descriptive of structural (geology), parametric (permeability) and hydrothermal (saturation, temperature) characteristics of the geologic system. Initial (a-priori) estimates of uncertainty in these characteristics are used to drive simulations of hydrothermal fluid flow and related geophysical processes in a large number of random realizations of the conceptual geothermal system spanning these uncertainties. The process seeks to improve the conceptual model by developing a ranked subset of model realizations that best match all available data within a specified norm or tolerance. Statistical (posterior) characteristics of these solutions reflect reductions in the a-priori uncertainties. The algorithm has been tested on a geothermal prospect located at Superstition Mountain, California and has been successful in creating a suite of models compatible with available temperature, surface resistivity, and magnetotelluric (MT) data. Although the MCMC method is highly flexible and capable of accommodating multiple and diverse datasets, a typical inversion may require the evaluation of thousands of possible model runs whose sophistication and complexity may evolve with the magnitude of data considered. As a result, we are testing the use of sensitivity analyses to better identify critical uncertain variables, lower order surrogate models to streamline computational costs, and value of information analyses to better assess optimal use of related data. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-658163 JF - American Geophysical Union Fall Meeting AU - Tompson, A F B AU - Mellors, R J AU - Dyer, K AU - Yang, X AU - Chen, M AU - Trainor Guitton, W AU - Wagoner, J L AU - Ramirez, A L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H23A EP - 0842 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/1752576812?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+a+stochastic+joint+inversion+modeling+algorithm+to+develop+a+hydrothermal+flow+model+at+a+geothermal+prospect&rft.au=Tompson%2C+A+F+B%3BMellors%2C+R+J%3BDyer%2C+K%3BYang%2C+X%3BChen%2C+M%3BTrainor+Guitton%2C+W%3BWagoner%2C+J+L%3BRamirez%2C+A+L%3BAnonymous&rft.aulast=Tompson&rft.aufirst=A+F&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 - Quantifying discharge to a subalpine stream using physical and geochemical methods AN - 1752576310; 2016-001408 AB - The goals of this study were to identify locations or reaches where groundwater enters streams and to quantify groundwater influx along two subalpine streams in the Tahoe Basin of the Sierra Nevada, California. Radon, a naturally-occurring, dissolved gas isotope found in surface water only in proximity to groundwater inputs, was measured along a 3 km reach of Squaw Creek and a 1 km reach of Martis Creek. A mass balance model of stream radon activity that considered only groundwater discharge as a radon source, and gas emanation as a radon sink was used to fit observed radon stream activities by varying groundwater discharge along the length of the streams. To quantify the gas emanation rate, we continuously introduced a xenon tracer at a single station via submerged gas permeable silicon tubing and measured its concentration at 8 downstream locations. In Martis Creek, we used the smoothly decreasing Xe tracer profile to determine the gas transfer velocity for this 1-km reach. Radon also decreases, but at a rate less than predicted from gass loss. Radon mass balance requires groundwater influx of 3 m3/m/d upstream to 2 m3/m/d downstream along this reach. These estimates were in good agreement with observed increases in discharge measured using a hand-held flow meter. JF - American Geophysical Union Fall Meeting AU - Moran, J E AU - Derubeis, E AU - Visser, A AU - Singleton, M J AU - Uriostegui, S H AU - Esser, B K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H31B EP - 0598 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576310?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Quantifying+discharge+to+a+subalpine+stream+using+physical+and+geochemical+methods&rft.au=Moran%2C+J+E%3BDerubeis%2C+E%3BVisser%2C+A%3BSingleton%2C+M+J%3BUriostegui%2C+S+H%3BEsser%2C+B+K%3BAnonymous&rft.aulast=Moran&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 - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Analysis of pressure data as CO2/brine leak diagnostic in shallow aquifers AN - 1752575945; 2016-001369 AB - Pressure is a promising signal for detecting CO2 leakage from deep, geologic storage reservoirs to shallow groundwater sources. Pressure signals should faster than other physical indications (i.e. electrical or geochemical changes) thus allowing for a timely leak diagnosis and mitigation. We explore the effectiveness of pressure as a detection tool. A simulation-based approach is used to diagnose a CO2/brine leak using pressure data from monitoring wells and to assess the influence of 3 principal uncertainties: distances between the source leak and the monitoring well, heterogeneity of the aquifer flow properties, and CO2 and brine leakage rates. Specifically, five parameters are sampled: the correlation lengths of the vertical and horizontal permeability for the aquifer (2), the sand proportion for each model (1), and the CO2 and brine leakage flux magnitude (2). Areal model dimensions and grid cell dimensions allow for sampling distances of 25 m to 990 m from the leaking well to the monitoring well. We generate 500 simulations by sampling each parameter within an appropriate range predefined by site-specific values. Pressure transducers in monitoring wells will only be accurate at measuring changes on the order of 0.1 to 0.3 PSI. These pressure thresholds are used to establish which simulations are classified as leaks at the leaking location and which locations away from the leak would constitute a signal. We observe 3 conclusions from the results: vertical flow barriers (heterogeneity) creates complicated pressure signals by forcing convoluted flow paths false positives (Pr( (No Leak / Signal)) do not occur with our sample simulations false negatives (Pr (Leak / No signal)) dominate after 200 days even when considering only potential monitoring wells within 100m of the leaking well. We use these posteriors to calculate the value of information (VOI) from above zone pressure data. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. Lawrence Livermore National Security, LLC. LLNL-ABS-657971 JF - American Geophysical Union Fall Meeting AU - Trainor Guitton, W AU - Mansoor, K AU - Sun, Y AU - Carroll, S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H24A EP - 02 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752575945?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+pressure+data+as+CO2%2Fbrine+leak+diagnostic+in+shallow+aquifers&rft.au=Trainor+Guitton%2C+W%3BMansoor%2C+K%3BSun%2C+Y%3BCarroll%2C+S%3BAnonymous&rft.aulast=Trainor+Guitton&rft.aufirst=W&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 - Multi-fluid geo-energy systems for bulk and thermal energy storage and dispatchable renewable and low-carbon electricity AN - 1752575940; 2016-001486 AB - Integrating renewable energy sources into electricity grids requires advances in bulk and thermal energy storage technologies, which are currently expensive and have limited capacity. We present an approach that uses the huge fluid and thermal storage capacity of the subsurface to harvest, store, and dispatch energy from subsurface (geothermal) and surface (solar, nuclear, fossil) thermal resources. CO (sub 2) captured from fossil-energy systems and N (sub 2) separated from air are injected into permeable formations to store pressure, generate artesian flow of brine, and provide additional working fluids. These enable efficient fluid recirculation, heat extraction, and power conversion, while adding operational flexibility. Our approach can also store and dispatch thermal energy, which can be used to levelize concentrating solar power and mitigate variability of wind and solar power. This may allow low-carbon, base-load power to operate at full capacity, with the stored excess energy being available to address diurnal and seasonal mismatches between supply and demand. Concentric rings of horizontal injection and production wells are used to create a hydraulic divide to store pressure, CO (sub 2) , N (sub 2) , and thermal energy. Such storage can take excess power from the grid and excess thermal energy, and dispatch that energy when it is demanded. The system is pressurized and/or heated when power supply exceeds demand and depressurized when demand exceeds supply. Supercritical CO (sub 2) and N (sub 2) function as cushion gases to provide enormous pressure-storage capacity. Injecting CO (sub 2) and N (sub 2) displaces large quantities of brine, reducing the use of fresh water. Geologic CO (sub 2) storage is a crucial option for reducing CO (sub 2) emissions, but valuable uses for CO (sub 2) are needed to justify capture costs. The initial "charging" of our system requires permanently isolating large volumes of CO (sub 2) from the atmosphere and thus creates a market for its disposal. Our approach is designed for locations where a permeable geologic formation is overlain by an impermeable formation that constrains migration of buoyant CO (sub 2) and/or N (sub 2) , and heated brine. Such geologic conditions exist over nearly half of the contiguous United States. This work was performed under the auspices of the U.S. DOE by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Buscheck, T A AU - Randolph, J AU - Saar, M O AU - Hao, Y AU - Sun, Y AU - Bielicki, J M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H41I EP - 02 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/1752575940?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Multi-fluid+geo-energy+systems+for+bulk+and+thermal+energy+storage+and+dispatchable+renewable+and+low-carbon+electricity&rft.au=Buscheck%2C+T+A%3BRandolph%2C+J%3BSaar%2C+M+O%3BHao%2C+Y%3BSun%2C+Y%3BBielicki%2C+J+M%3BAnonymous&rft.aulast=Buscheck&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 - Flow of concentrated suspensions through fractures; significant in-plane velocity variations caused by small variations in solid concentration AN - 1739086626; 2015-114431 AB - Flow of fluids containing large concentrations of suspended solids through narrow fractures is important in subsurface processes where the permeability of the fracture is greater than the surrounding matrix (i.e. sand intrusion, environmental remediation, hydraulic fracturing, magma flow, and mud volcanoes). We present results from experiments in which a high concentration (50% by volume) of granular solids suspended in a non-Newtonian carrier fluid (0.75% guar gum in water) flowed through a transparent parallel-plate fracture. Digital particle-image-velocimetry analysis demonstrates the development of a strongly heterogeneous velocity field within the fracture that persists for the length of the fracture. The highest velocities were observed along the no-flow boundaries and the lowest velocities along the centerline; we carried out numerical simulations and additional experiments to elucidate this surprising result. Depth-averaged (2D) simulations using a rheological model of concentrated suspensions of mono-disperse solids in Newtonian fluids reproduced experimental observations of the velocity field when small (3%) variations in solid concentration were introduced. Such concentration variability led to significant (factor of two) velocity variations within the fracture yet negligible changes in observed pressure gradients. Two plausible explanations for solid-concentration variability are: (i) shearing of the fluid at the no-flow boundaries induced these concentration variations or (ii) they were induced by upstream boundary conditions. A second set of experiments was performed to identify which of the two phenomena caused the observed velocity variations. A narrow obstruction was placed along the centerline of the same cell; reduced velocities along the obstruction were observed, indicating that the observed velocity variations are the result of solid concentration heterogeneities that occurred in the upstream boundary and not from concentration heterogeneities developing inside the fracture. Our results suggest that small variations in solid concentration can lead to significant velocity variations such that a simple fracture-averaged conductivity may not reliably predict transport of suspended solids within fractures. JF - American Geophysical Union Fall Meeting AU - Medina, Ricardo AU - Detwiler, R L AU - Morris, J P AU - Prioul, R AU - Desroches, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H31P EP - 07 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739086626?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Flow+of+concentrated+suspensions+through+fractures%3B+significant+in-plane+velocity+variations+caused+by+small+variations+in+solid+concentration&rft.au=Medina%2C+Ricardo%3BDetwiler%2C+R+L%3BMorris%2C+J+P%3BPrioul%2C+R%3BDesroches%2C+J%3BAnonymous&rft.aulast=Medina&rft.aufirst=Ricardo&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 - Superposition well-test method for reservoir characterization and pressure management during CO (sub 2) injection AN - 1739085629; 2015-114330 AB - As a significant fraction of a carbon storage project's budget is devoted to site characterization and monitoring, there has been an intense drive in recent years to both lower cost and improve the quality of data obtained. Two data streams that are cheap and always available are pressure and flow rate measurements from the injection well. Falloff testing, in which the well is shut-in for some period of time and the pressure decline curve measured, is often used to probe the storage zone and look for indications of hydraulic barriers, fracture-dominated flow, and other reservoir characteristics. These tests can be used to monitor many hydromechanical processes of interest, including hydraulic fracturing and fault reactivation. Unfortunately, the length of the shut-in period controls how far away from the injector information may be obtained. For operational reasons these tests are typically kept short and infrequent, limiting their usefulness. In this work, we present a new analysis method in which ongoing injection data is used to reconstruct an equivalent falloff test, without shutting in the well. The entire history of injection may therefore be used as a stand in for a very long test. The method relies upon a simple superposition principle to transform a multi-rate injection sequence into an equivalent single-rate process. We demonstrate the effectiveness of the method using injection data from the Snohvit storage project. We also explore its utility in an active pressure management scenario. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - White, J A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11K EP - 01 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/1739085629?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Superposition+well-test+method+for+reservoir+characterization+and+pressure+management+during+CO+%28sub+2%29+injection&rft.au=White%2C+J+A%3BAnonymous&rft.aulast=White&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 - Image analysis of proppant performance in pressurized fractures AN - 1739085593; 2015-114299 AB - Proppants are small particles used to prop or hold open subsurface fractures to permit fluid flow through these pathways. In many oil and gas well applications, the most common proppant materials are sand, ceramic particles, resin-coated sands, glass beads or even walnut shells. More dense proppants require additives to create viscous fluids which can transport them further along wells and into fractures, but are generally preferred over neutrally buoyant options due to their increased strength. Currently, proppant strength and generation of broken fragments ("fines") is analyzed via a standardized crush test between parallel plates. To augment this type of information, we present here the results of various experiments involving resin-coated proppants held at increasing pressures in fractured samples of Marcellus shale. The shale/proppant samples were imaged continuously with an industrial tomography scanner during pressurization up to 10,000 psi. This technique allows for in situ characterization of fracture/proppant interactions and fracture void volume and average aperture with varying confining pressures. JF - American Geophysical Union Fall Meeting AU - Crandall, Dustin AU - Smith, Megan M AU - Carroll, S AU - Walsh, S D AU - Gill, Magdalena AU - Moore, Johnathan AU - Tennant, Bryan AU - Aines, Roger D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11H EP - 0991 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/1739085593?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Image+analysis+of+proppant+performance+in+pressurized+fractures&rft.au=Crandall%2C+Dustin%3BSmith%2C+Megan+M%3BCarroll%2C+S%3BWalsh%2C+S+D%3BGill%2C+Magdalena%3BMoore%2C+Johnathan%3BTennant%2C+Bryan%3BAines%2C+Roger+D%3BAnonymous&rft.aulast=Crandall&rft.aufirst=Dustin&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 - The influence of kinetic growth factors on the clumped isotope composition of calcite AN - 1739082769; 2015-117256 AB - Clumped isotope paleothermometry is based on the association of 13C and 18O within carbonate minerals. Although the influence of temperature on equilibrium 13C-18O bond ordering has been studied, recent oxygen isotope studies of inorganic calcite demonstrate that calcite grown in laboratory experiments and in many natural settings does not form in equilibrium with water. It is therefore likely that the carbon and clumped isotope composition of these calcite crystals are not representative of true thermodynamic equilibrium. To isolate kinetic clumped isotope effects that arise at the mineral-solution interface, clumped isotopic equilibrium of DIC species must be maintained. This can be accomplished by dissolving the enzyme carbonic anhydrase (CA) into the solution, thereby reducing the time required for isotopic equilibration of DIC species by approximately two orders of magnitude between pH 7.7 and 9.3. We conduct calcite growth experiments aimed specifically at measuring the pH-dependence of kinetic clumped isotope effects during non-equilibrium precipitation of calcite. We precipitated calcite from aqueous solution at a constant pH and controlled supersaturation over the pH range 7.7-9.3 in the presence of CA. For each experiment, a gas mixture of N2 and CO2 is bubbled through a beaker of solution without seed crystals. As CO2 from the gas dissolves into solution, calcite crystals grow on the beaker walls. The pH of the solution is maintained by use of an autotitrator with NaOH as the titrant. We control the temperature, pH, the pCO2 of the gas inflow, and the gas inflow rate, and monitor the total alkalinity, the pCO2 of the gas outflow, and the amount of NaOH added. A constant crystal growth rate of approximately 1.6 mmol/m2/hr is maintained over all experiments. Results from these experiments are compared to predictions from a recently-developed isotopic ion-by-ion growth model of calcite. The model describes the rate, temperature and pH dependence of oxygen isotope uptake into calcite under non-equilibrium conditions. Adaptation of the model for clumped isotope uptake under non-equilibrium conditions requires knowledge of the clumped isotopic compositions of DIC species and any mass-dependent kinetic fractionation that arises during ion transport to or from the mineral surface. JF - American Geophysical Union Fall Meeting AU - Hunt, Jonathan David AU - Watkins, J M AU - Tripati, A AU - Ryerson, F J AU - DePaolo, D J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP51A EP - 1108 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739082769?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+influence+of+kinetic+growth+factors+on+the+clumped+isotope+composition+of+calcite&rft.au=Hunt%2C+Jonathan+David%3BWatkins%2C+J+M%3BTripati%2C+A%3BRyerson%2C+F+J%3BDePaolo%2C+D+J%3BAnonymous&rft.aulast=Hunt&rft.aufirst=Jonathan&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 - Response of heterogeneous and fractured carbonate samples to CO (sub 2) -brine exposure AN - 1739082650; 2015-116938 AB - Carbonate rock units are often considered as candidate sites for storage of carbon dioxide (CO2), whether as stand-alone reservoirs or coupled with enhanced oil recovery efforts. In order to accept injected carbon dioxide, carbonate reservoirs must either possess sufficient preexisting connected void space, or react with CO2-acidified fluids to produce more pore space and improve permeability. However, upward migration of CO2 through barrier zones or seal layers must be minimized for effective safe storage. Therefore, prediction of the changes to porosity and permeability in these systems over time is a key component of reservoir management. Towards this goal, we present the results of several experiments on carbonate core samples from the Wellington, Kansas 1-32 well, conducted under reservoir temperature, pressure, and CO2 conditions. These samples were imaged by X-ray computed tomography (XRCT) and analyzed with nuclear magnetic resonance (NMR) spectroscopy both prior to and after reaction with CO2-enriched brines. The carbonate samples each displayed distinct responses to CO2 exposure in terms of permeability change with time and relative abundance of calcite versus dolomite dissolution. The measured permeability of each sample was also much lower than that estimated by downhole NMR logging, with samples with larger fractured regions possessing higher permeability values. We present also our modeling approach and preliminary simulation results for a specific sample from the targeted injection zone. The heterogeneous composition as well as the presence of large fractured zones within the rock necessitated the use of a nested three-region approach to represent the range of void space observed via tomography. Currently, the physical response to CO2-brine flow (i.e., pressure declines with time) is reproduced well but the extent of chemical reaction is overestimated by the model. JF - American Geophysical Union Fall Meeting AU - Smith, M M AU - Mason, H E AU - Hao, Y AU - Carroll, S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H12B 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/1739082650?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Response+of+heterogeneous+and+fractured+carbonate+samples+to+CO+%28sub+2%29+-brine+exposure&rft.au=Smith%2C+M+M%3BMason%2C+H+E%3BHao%2C+Y%3BCarroll%2C+S%3BAnonymous&rft.aulast=Smith&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 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 - Waves generated by asteroid impacts and their hazard consequences on the shorelines AN - 1739082444; 2015-117122 AB - We have performed numerical simulations of a hypothetical asteroid impact onto the ocean in support of an emergency preparedness, planning, and management exercise. We addressed the scenario from asteroid entry; to ocean impact (splash rim); to wave generation, propagation, and interaction with the shoreline. For the analysis we used GEODYN, a hydrocode, to simulate the impact and generate the source wave for the large-scale shallow water wave program, SWWP. Using state-of-the-art, high-performance computing codes we simulated three impact areas - two are located on the West Coast near Los Angeles's shoreline and the San Francisco Bay, respectively, and the third is located in the Gulf of Mexico, with a possible impact location between Texas and Florida. On account of uncertainty in the exact impact location within the asteroid risk corridor, we examined multiple possibilities for impact points within each area. Uncertainty in the asteroid impact location was then convolved and represented as uncertainty in the shoreline flooding zones. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344, and partially funded by the Laboratory Directed Research and Development Program at LLNL under tracking code 12-ERD-005. JF - American Geophysical Union Fall Meeting AU - Ezzedine, S M AU - Miller, Paul AU - Dearborn, David AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH21B EP - 3839 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/1739082444?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Waves+generated+by+asteroid+impacts+and+their+hazard+consequences+on+the+shorelines&rft.au=Ezzedine%2C+S+M%3BMiller%2C+Paul%3BDearborn%2C+David%3BAnonymous&rft.aulast=Ezzedine&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 - Particle sorting in filter porous media and in sediment transport; a numerical and experimental study AN - 1734269688; 2015-111764 AB - Understanding the flow of fines, particulate sorting in porous media and fractured media during sediment transport is significant for industrial, environmental, geotechnical and petroleum technologies to name a few. For example, the safety of dam structures requires the characterization of the granular filter ability to capture fine-soil particles and prevent erosion failure in the event of an interfacial dislocation. Granular filters are one of the most important protective design elements of large embankment dams. In case of cracking and erosion, if the filter is capable of retaining the eroded fine particles, then the crack will seal and the dam safety will be ensured. Here we develop and apply a numerical tool to thoroughly investigate the migration of fines in granular filters at the grain scale. The numerical code solves the incompressible Navier-Stokes equations and uses a Lagrange multiplier technique. The numerical code is validated to experiments conducted at the USACE and ERDC. These laboratory experiments on soil transport and trapping in granular media are performed in constant-head flow chamber filled with the filter media. Numerical solutions are compared to experimentally measured flow rates, pressure changes and base particle distributions in the filter layer and show good qualitative and quantitative agreement. To further the understanding of the soil transport in granular filters, we investigated the sensitivity of the particle clogging mechanism to various parameters such as particle size ratio, the magnitude of hydraulic gradient, particle concentration, and grain-to-grain contact properties. We found that for intermediate particle size ratios, the high flow rates and low friction lead to deeper intrusion (or erosion) depths. We also found that the damage tends to be shallower and less severe with decreasing flow rate, increasing friction and concentration of suspended particles. We have extended these results to more realistic heterogeneous population particulates for sediment transport. This work performed under the auspices of the US DOE by LLNL under Contract DE-AC52-07NA27344 and was sponsored by the Department of Homeland Security, Science and Technology Directorate, Homeland Security Advanced Research Projects Agency. JF - American Geophysical Union Fall Meeting AU - Glascoe, L G AU - Ezzedine, S M AU - Kanarska, Y AU - Lomov, I N AU - Antoun, T AU - Smith, J AU - Hall, R AU - Woodson, S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract EP52A EP - 03 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734269688?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Particle+sorting+in+filter+porous+media+and+in+sediment+transport%3B+a+numerical+and+experimental+study&rft.au=Glascoe%2C+L+G%3BEzzedine%2C+S+M%3BKanarska%2C+Y%3BLomov%2C+I+N%3BAntoun%2C+T%3BSmith%2C+J%3BHall%2C+R%3BWoodson%2C+S%3BAnonymous&rft.aulast=Glascoe&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 - Sedimentary geochemistry depicts 2700 years of regional climate and land use change in the Rieti Basin, Central Italy AN - 1734268907; 2015-111964 AB - A 14.4 m thick sedimentary sequence was recovered in multiple cores from Lago Lungo in the Rieti Basin, an intrapenninic extensional basin approximately 80 km north of Rome, Italy. This sequence provides a high-resolution record of environmental change related to climatic influence and anthropogenic landscape alteration. Pollen analyses, corroborated with historical records of land-use change, define the major shifts in forest composition and their historical context. An age model of the sequence was built using ties to regional cultigen datums and archaeomagnetic reference curves. Here we focus on sedimentologic and geochemical data (scanning XRF) from the Roman Period through the Little Ice Age (LIA). The base of the sequence (ca. 680 BCE-1 CE) is marked by a steady increase in fine-grained detrital elements Ti, Rb, and K, and corresponding decrease in Ca, representing a transition from the unaltered system after the Romans constructed a channel that the basin. The Medieval Period (MP; 900-1350 CE) is lithologically distinct, composed of varicolored bands of alternating silt, clay, and calcareous concretions. Low counts of Ca, high detrital elements and frequent abrupt peaks in levels of the redox elements Fe and Mn indicate episodic clastic influx. Pollen data indicate that the greatest degree of deforestation and erosion occurred during the MP, supported by mean sedimentation rates of ca. 1 cm/year, over twice the rate of the underlying interval. The Medieval climate was warmer and more stable, population increased, and elevations >1000 m were exploited for agriculture. The influence of the Velino River on the lake appears to increase during the MP through channel migration, increased flooding, or increased overland flow. The next transition (1350 CE) marks the start of the LIA and is coincident with the Black Plague. Historical records document a large earthquake in 1349 that severely struck Central Italy, with possible effects on the lake's depositional and hydrochemical regime. Clastic input abruptly ceases at the start of the LIA, and peaks in Sr, Ca, and S may be attributed to changes in lake inflow. Core analyses results, corroborated with historical documentation, provide new insights into the basin history and the underlying causes of environmental change. JF - American Geophysical Union Fall Meeting AU - Archer, Claire AU - Noble, P J AU - Mensing, S A AU - Tunno, Irene AU - Sagnotti, Leonardo AU - Florindo, Fabio AU - Cifnani, G AU - Zimmerman, S R H AU - Piovesan, G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GC21E EP - 0600 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/1734268907?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sedimentary+geochemistry+depicts+2700+years+of+regional+climate+and+land+use+change+in+the+Rieti+Basin%2C+Central+Italy&rft.au=Archer%2C+Claire%3BNoble%2C+P+J%3BMensing%2C+S+A%3BTunno%2C+Irene%3BSagnotti%2C+Leonardo%3BFlorindo%2C+Fabio%3BCifnani%2C+G%3BZimmerman%2C+S+R+H%3BPiovesan%2C+G%3BAnonymous&rft.aulast=Archer&rft.aufirst=Claire&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 - Tropical pacific forcing of late-Holocene hydrologic variability in the coastal Southwest United States AN - 1729848388; 2015-104194 AB - Change in water availability is of great concern in the coastal Southwest United States (CSWUS). Reconstructing the history of water pre-1800 AD requires the use of proxy data. Lakes provide long-lived, high-resolution terrestrial archives of past hydrologic change, and their sediments contain a variety of proxies. This study presents geochemical, sedimentological, and biological data from Zaca Lake, CA (Santa Barbara County) used to reconstruct a 3000 year history of winter season moisture source (dDwax) and catchment run-off (125-2000 mm sand) at decadal resolution. Vegetative response to hydrologic change is also investigated using pollen. Here we show that winter season moisture source and run-off are highly variable over the past 3000 years; superimposed are regime shifts between wetter or drier conditions that persist on average over multiple centuries. Moisture source and run-off do not consistently covary indicating multiple atmospheric circulation modes where wetter/drier conditions prevail. Grain-size analysis reveals two intervals of multi-century drought with less run-off that pre-date the "epic droughts" as identified by Cook et al. (2004). A well-defined wet period with more run-off is identified during the Little Ice Age. Notably, the grain size data show strong coherence with western North American percent drought area indices for the past 1000 years. As a result, our data extend the history of drought and pluvials back to 3000 calendar years BP in the CSWUS. Comparison to tropical Pacific proxies confirms the long-term relationship between El Nino and enhanced run-off in the CSWUS. Our results demonstrate the long-term importance of the tropical Pacific to the CSWUS winter season hydroclimate. JF - American Geophysical Union Fall Meeting AU - Kirby, M E AU - Feakins, S J AU - Hiner, C AU - Fantozzi, J M AU - Zimmerman, S R H AU - Dingemans, T AU - Mensing, S A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP24B EP - 05 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/1729848388?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Tropical+pacific+forcing+of+late-Holocene+hydrologic+variability+in+the+coastal+Southwest+United+States&rft.au=Kirby%2C+M+E%3BFeakins%2C+S+J%3BHiner%2C+C%3BFantozzi%2C+J+M%3BZimmerman%2C+S+R+H%3BDingemans%2C+T%3BMensing%2C+S+A%3BAnonymous&rft.aulast=Kirby&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 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 - High pressure hydrogen from first principles AN - 1729848186; 2015-104156 AB - Typical approximations employed in first-principles simulations of high-pressure hydrogen involve the neglect of nuclear quantum effects (NQE) and the approximate treatment of electronic exchange and correlation, typically through a density functional theory (DFT) formulation. In this talk I'll present a detailed analysis of the influence of these approximations on the phase diagram of high-pressure hydrogen, with the goal of identifying the predictive capabilities of current methods and, at the same time, making accurate predictions in this important regime. We use a path integral formulation combined with density functional theory, which allows us to incorporate NQEs in a direct and controllable way. In addition, we use state-of-the-art quantum Monte Carlo calculations to benchmark the accuracy of more approximate mean-field electronic structure calculations based on DFT, and we use GW and hybrid DFT to calculate the optical properties of the solid and liquid phases near metallization. We present accurate predictions of the metal-insulator transition on the solid, including structural and optical properties of the molecular phase. This work was supported by the U.S. Department of Energy at the Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and by LDRD Grant No. 13-LW-004. JF - American Geophysical Union Fall Meeting AU - Morales, M A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR11C EP - 01 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/1729848186?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+hydrogen+from+first+principles&rft.au=Morales%2C+M+A%3BAnonymous&rft.aulast=Morales&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 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 - Seismic anisotropy along the Eurasian-Arabian plate boundary AN - 1729848043; 2015-103948 AB - The Anatolian Plateau and Caucasus are part of the orogenic belt that formed as the result of the closure of the Neo Tethys Ocean and the ensuing continental collision of Arabian and Eurasian Plates. Multiple tomographic studies of both P and S wave velocities all show a broad low velocity zone beneath East Anatolian and North Iranian Plateaus. The low velocity zone appears to range from the Moho to a depth 150 km, which suggests asthenospheric material underlying a very thin lithosphere of eastern Anatolia. This low velocity zone coincides with widespread late Miocene-Quaternary calc-alkaline volcanic products of mantle origin. This very shallow asthenosphere strongly implies that any present day anisotropy is likely to reflect very recent mantle deformation. In order to image seismic anisotropy and improve understanding of the nature of mantle deformation in young continental collision zone we analyzed data from the IRIS station KIV and the regional seismic networks of Turkey, Azerbaijan and Georgia to determine shear wave splitting fast polarization directions and delay times in the region. Our results show that the fast polarization directions are quite uniformly parallel to NE-SW across the East Anatolian Plateau and the westernmost part of the Greater Caucasus. The observed delay times decrease northward with the shortest located in the western Greater Caucasus. However, to the east, the fast polarization direction rotates clockwise until it becomes parallel to the EW topographic? trend in the Lesser Caucasus where the delay times are the largest in the region. The situation becomes more complex north of the Lesser Caucasus, in the central and eastern parts of the Greater Caucasus, where the fast polarization directions shift abruptly to the NNE-SSW. Furthemore, we find relatively strong evidence of layered anisotropy using a new method we have developed to image multi-layered polarization anisotropy from teleseismic core phases such as SKS. JF - American Geophysical Union Fall Meeting AU - Sandvol, E A AU - Skobeltsyn, G AU - Turkelli, N AU - Polat, G AU - Yetirmishli, G AU - Godoladze, T AU - Mellors, R J AU - Gok, R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract DI21B EP - 08 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/1729848043?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+anisotropy+along+the+Eurasian-Arabian+plate+boundary&rft.au=Sandvol%2C+E+A%3BSkobeltsyn%2C+G%3BTurkelli%2C+N%3BPolat%2C+G%3BYetirmishli%2C+G%3BGodoladze%2C+T%3BMellors%2C+R+J%3BGok%2C+R%3BAnonymous&rft.aulast=Sandvol&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 - Superionic water-ammonia mixtures AN - 1729847641; 2015-106125 AB - The interior of the Giant Planets Uranus and Neptune contains large amounts of water, ammonia and methane (referred to as planetary ices). Many observable properties of these planets, such as luminosity, gravitational moments and magnetic fields, are thought to be determined by the physical and chemical properties of matter within this ice layer. Hence, the phase diagrams, equations of state and structural properties of these materials and their respective mixtures are of great interest. Especially the phase diagrams of water and ammonia gained much attention since Cavazzoni et al. proposed superionic phases for these materials, which are characterized by highly mobile hydrogen ions in a lattice of oxygen and nitrogen ions, respectively. For water, the influence of such a phase on the properties of the Giant Planets as well as on exoplanets has been discussed widely. Nevertheless, it is an open question how the properties of such a water layer change when another compound, e.g., ammonia is introduced. Considering a 1:1 mixture, we have performed ab initio simulations based on density functional theory using the VASP code heating up structures which we had found from evolutionary random structure search calculations with XtalOpt. We propose possible superionic water-ammonia structures present up to several Mbar. Moreover, we investigate the equation of state and transport properties of this mixture such as diffusion coefficients in order to compare with the pure compounds. These results are essential to construct new interior models for Neptune-like planets. JF - American Geophysical Union Fall Meeting AU - Bethkenhagen, Mandy AU - Cebulla, Daniel AU - Redmer, Ronald AU - Hamel, S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR11C EP - 07 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/1729847641?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Superionic+water-ammonia+mixtures&rft.au=Bethkenhagen%2C+Mandy%3BCebulla%2C+Daniel%3BRedmer%2C+Ronald%3BHamel%2C+S%3BAnonymous&rft.aulast=Bethkenhagen&rft.aufirst=Mandy&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 - First-principles equation of state and transport properties for planetary science AN - 1729846057; 2015-106163 AB - Understanding the equation of state (EOS) and transport properties of hydrogen, helium, ices (H2O, NH3, CH4), carbon and silicates under high temperature and pressure is fundamental to provide an accurate description of planetary interiors and planetary evolution models for giant planets. We report on the recent progress achieved in improving the techniques to build global EOS and transport models based on first-principles electronic structure calculations for use in planetary science and the impact these new EOS models have had on structure models for Uranus and Neptune. JF - American Geophysical Union Fall Meeting AU - Hamel, S AU - Qi, T AU - Bethkenhagen, Mandy AU - Nettelmann, Nadine AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 EP - Abstract 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/1729846057?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=First-principles+equation+of+state+and+transport+properties+for+planetary+science&rft.au=Hamel%2C+S%3BQi%2C+T%3BBethkenhagen%2C+Mandy%3BNettelmann%2C+Nadine%3BAnonymous&rft.aulast=Hamel&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 - 2015-11-05 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 - Light elements in the core; constraints from gallium partitioning AN - 1729845199; 2015-106852 AB - The formation of Earth's core has left a compositional imprint on the mantle, depleting and fractionating most of its siderophile (iron-loving) elements. Gallium is a moderately siderophile, hence it should be strongly depleted in the mantle. However, gallium concentration in the mantle matches that of lithophile (silicate-loving) elements having the same volatility. That is to say that either gallium behaves as a lithophile element during core formation, or a large influx of gallium was brought to the Earth after the core had formed. Geochemical evidence does not support the latter hypothesis, as it would require all other lithophile elements with similar volatility to be enriched in the mantle, or for late accretion to be composed of anomalously gallium-rich objects. In order to mitigate this issue, experimental studies have tried to understand how gallium behaves during core segregation by gauging the effects of pressure, temperature and oxygen fugacity on the partitioning of gallium between metal and silicate. None of these parameters provided the first-order change required to match the observation. We investigated the influence of core composition on gallium partitioning. The core in known to contain light-elements (oxygen, silicon sulfur and carbon), and those can change the activity of gallium in the metal, and strongly affect the behavior of gallium during core formation. We performed a series of metal-silicate partitioning experiments (2 GPa, 1673-2073 K) in a piston-cylinder press. We varied the light-element composition of the metal and observed that Si and O have a very strong influence on the activity of gallium, making it more lithophile. We then modeled terrestrial accretion as a continuous process and tested different accretion histories; we can reproduce the mantle concentration of gallium if the core segregates in a deep magma ocean (>40 GPa) and contains large amounts of silicon or oxygen. JF - American Geophysical Union Fall Meeting AU - Blanchard, I AU - Badro, J AU - Siebert, J AU - Ryerson, F J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract V31A EP - 4715 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/1729845199?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Light+elements+in+the+core%3B+constraints+from+gallium+partitioning&rft.au=Blanchard%2C+I%3BBadro%2C+J%3BSiebert%2C+J%3BRyerson%2C+F+J%3BAnonymous&rft.aulast=Blanchard&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 - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Constraining mantle heterogeneities with joint inversions of seismic, geodynamic, and mineral physics data AN - 1729844652; 2015-101174 AB - Two outstanding goals of solid earth geophysics are to determine the chemical structure of the Earth and to understand the dynamics of its interior. The dynamics of the mantle are controlled by density variations and combined knowledge of density structure and seismic velocities provide the strongest constraints on chemical heterogeneity. Unfortunately, most of the traditional geophysical methods such as seismic tomography and geodynamic modeling alone cannot adequately resolve the density structure within the mantle. Thus, seismic, geodynamic and mineral physics joint inversion methods have been applied to better understand the dynamics of the mantle in recent years (e.g. Simmons et al. 2010). In these joint inversions, P wave and S wave travel times, as well as four convection-related geodynamic observations (free air gravity, tectonic plate motion, dynamic topography, and the excess ellipticity of the core-mantle boundary) can be used to produce 3-D models of density and seismic velocities simultaneously. The approach initially attempts to find a model that assuming temperature controls lateral variations in mantle properties and then to consider more complicated lateral variations that account for the presence of chemical heterogeneity to further fit data. Here we present new joint inversion results include 50% more new S wave travel time data than in previous work and geodynamic data that extend to larger spherical harmonic degrees. In addition, temperature derivatives of P and S velocity and density have been determined using an updated mineral physics dataset. For the first time we include non-linear anelastic temperature effects on velocities in the joint inversion. The anelastic effects decrease the required high density component within the lower mantle superplumes. The hypothesis that temperature variations explain most observed heterogeneity within the mantle is consistent with our data. JF - American Geophysical Union Fall Meeting AU - Lu, C AU - Grand, S P AU - Forte, A M AU - Simmons, N A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract DI23A EP - 4281 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/1729844652?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Constraining+mantle+heterogeneities+with+joint+inversions+of+seismic%2C+geodynamic%2C+and+mineral+physics+data&rft.au=Lu%2C+C%3BGrand%2C+S+P%3BForte%2C+A+M%3BSimmons%2C+N+A%3BAnonymous&rft.aulast=Lu&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 - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hess Deep Interactive Lab; exploring the structure and formation of the oceanic crust through hands-on models and online tools AN - 1722155590; 2015-100165 AB - Scientific ocean drilling through the International Ocean Discovery Program (IODP) has contributed extensively to our knowledge of Earth systems science. However, many of its methods and discoveries can seem abstract and complicated for students. Collaborations between scientists and educators/artists to create accurate yet engaging demonstrations and activities have been crucial to increasing understanding and stimulating interest in fascinating geological topics. One such collaboration, which came out of Expedition 345 to the Hess Deep Rift, resulted in an interactive lab to explore sampling rocks from the usually inacessible lower oceanic crust, offering an insight into the geological processes that form the structure of the Earth's crust. This Hess Deep Interactive Lab aims to explain several significant discoveries made by oceanic drilling utilizing images of actual thin sections and core samples recovered from IODP expeditions. Participants can interact with a physical model to learn about the coring and drilling processes, and gain an understanding of seafloor structures. The collaboration of this lab developed as a need to explain fundamental notions of the ocean crust formed at fast-spreading ridges. A complementary interactive online lab can be accessed at www.joidesresolution.org for students to engage further with these concepts. This project explores the relationship between physical and on-line models to further understanding, including what we can learn from the pros and cons of each. JF - American Geophysical Union Fall Meeting AU - Kurtz, N AU - Marks, N AU - Cooper, S K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract ED42A EP - 02 PB - American Geophysical Union, Washington, DC VL - 2014 KW - oceanic crust KW - East Pacific KW - Northeast Pacific KW - North Pacific KW - Pacific Ocean KW - Hess Deep KW - Expedition 345 KW - Integrated Ocean Drilling Program KW - crust KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722155590?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Hess+Deep+Interactive+Lab%3B+exploring+the+structure+and+formation+of+the+oceanic+crust+through+hands-on+models+and+online+tools&rft.au=Kurtz%2C+N%3BMarks%2C+N%3BCooper%2C+S+K%3BAnonymous&rft.aulast=Kurtz&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 2016, 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 - 2016-04-14 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - crust; East Pacific; Expedition 345; Hess Deep; Integrated Ocean Drilling Program; North Pacific; Northeast Pacific; oceanic crust; Pacific Ocean ER - TY - JOUR T1 - Melting of iron close to the inner core boundary pressure AN - 1722154400; 2015-097774 AB - The melting curve of iron at the pressure of the inner core boundary places a strong constraint on the thermal profile within the Earth, the heat flux to the mantle, and also the power to drive the geodynamo. Recent static diamond anvil cell measurements by Anzellini et al. 2013 have accurately measured the melting curve of iron to 200 GPa, which is a tremendous improvement in the available data but is still only 60% of the pressure at the inner core boundary, and thus requires significant extrapolation. Nguyen and Holmes, 2004, have used the sound velocity technique to measure the melting transition on the principal Hugoniot, up to 270 GPa, but some still believe that sound velocity is not an accurate diagnostic of melting as it detects a loss of strength and also that kinetics can mitigate the utility of dynamic melting techniques. Here we use in-situ x-ray diffraction to unambiguously measure the melting transition on the principal Hugoniot of iron to 270 GPa. We also show that iron melts from the hcp phase at pressures up to 270 GPa, which is significantly closer to the inner core boundary than any previous melting curve measurement capable of phase discrimination. From comparison of our measurements to those of Nguyen and Holmes, we show that sound velocity measurements can accurately constrain the melting curve and that the kinetics of melting iron are faster than both laser shock and gas gun experimental timescales. Thereby, dynamic techniques should be trusted for probing the melting curve of metals and they also offer the greatest opportunity to probe the melting curve of iron at the pressure of the inner core boundary and also the higher pressures achieved within the interiors of super-Earths. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Kraus, Richard G AU - Coppari, F AU - Fratanduono, D E AU - Eggert, J AU - Collins, G W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR31A EP - 4311 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/1722154400?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Melting+of+iron+close+to+the+inner+core+boundary+pressure&rft.au=Kraus%2C+Richard+G%3BCoppari%2C+F%3BFratanduono%2C+D+E%3BEggert%2C+J%3BCollins%2C+G+W%3BAnonymous&rft.aulast=Kraus&rft.aufirst=Richard&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 - Two-dimensional imaging velocimetry of heterogeneous flow and brittle failure in diamond AN - 1722154371; 2015-097804 AB - Understanding the nature and dynamics of heterogeneous flow in diamond subjected to shock compression is important for many fields of research, from inertial confinement fusion to the study of carbon rich planets. Waves propagating through a shocked material can be significantly altered by the various deformation mechanisms present in shocked materials, including anisotropic sound speeds, phase transformations, plastic/inelastic flow and brittle failure. Quantifying the spatial and temporal effects of these deformation mechanisms has been limited by a lack of diagnostics capable of obtaining simultaneous micron resolution spatial measurements and nanosecond resolution time measurements. We have utilized the 2D Janus High Resolution Velocimeter at LLNL to study the time and space dependence of fracture in shock-compressed diamond above the Hugoniot elastic limit. Previous work on the OMEGA laser facility (Rochester) has shown that the free-surface reflectivity of mu m-grained diamond samples drops linearly with increasing sample pressure, whereas under the same conditions the reflectivity of nm-grained samples remains unaffected. These disparate observations can be understood by way of better documenting fracture in high-strain compression of diamond. To this end, we have imaged the development and evolution of elastic-wave propagation, plastic-wave propagation and fracture networks in the three primary orientations of single-crystal diamond, as well as in microcrystalline and nanocrystalline diamond, and find that the deformation behavior depends sensitively on the orientation and crystallinity of the diamonds. JF - American Geophysical Union Fall Meeting AU - Ali, S J AU - Smith, R AU - Erskine, D AU - Eggert, J AU - Celliers, P M AU - Collins, G W AU - Jeanloz, R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR33A EP - 4341 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/1722154371?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Two-dimensional+imaging+velocimetry+of+heterogeneous+flow+and+brittle+failure+in+diamond&rft.au=Ali%2C+S+J%3BSmith%2C+R%3BErskine%2C+D%3BEggert%2C+J%3BCelliers%2C+P+M%3BCollins%2C+G+W%3BJeanloz%2C+R%3BAnonymous&rft.aulast=Ali&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 - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - Irreversible xenon insertion into a small-pore zeolite at moderate pressures and temperatures AN - 1722154013; 2015-097815 AB - Pressure drastically alters chemical and physical properties of materials and allows structural phase transitions and chemical reactions to occur that defy much of our understanding gained at ambient conditions. Particularly exciting is the high-pressure chemistry of Xenon, which is known to react with hydrogen and ice at high pressures, and form stable compounds under pressure. Here we show that Ag (sub 16) Al (sub 16) Si (sub 24) O (sub 80) .16H (sub 2) O irreversibly inserts Xe into its micropores at 1.7 GPa and 250 degrees C while Ag+ reduces to metallic Ag and possibly oxidizes to Ag2+. In contrast to Krypton, Xenon is retained within the pores of this zeolite after pressure release and requires heat to desorb. This irreversible insertion and trapping of Xenon in Ag-natrolite at moderate conditions sheds new light on chemical reactions that could account for a Xenon deficiency relative to Argon observed in terrestrial and Martian atmospheres. JF - American Geophysical Union Fall Meeting AU - Lee, Yong Jae AU - Seoung, D H AU - Lee, Y M AU - Cynn, H L AU - Park, C AU - Choi, K Y AU - Blom, Doug AU - Evans, W AU - Kao, C C AU - Vogt, T AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR33A EP - 4352 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/1722154013?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Irreversible+xenon+insertion+into+a+small-pore+zeolite+at+moderate+pressures+and+temperatures&rft.au=Lee%2C+Yong+Jae%3BSeoung%2C+D+H%3BLee%2C+Y+M%3BCynn%2C+H+L%3BPark%2C+C%3BChoi%2C+K+Y%3BBlom%2C+Doug%3BEvans%2C+W%3BKao%2C+C+C%3BVogt%2C+T%3BAnonymous&rft.aulast=Lee&rft.aufirst=Yong&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 - Equation of state and transport properties of silicates under extreme conditions AN - 1722153887; 2015-097787 AB - Understanding the physical properties of silicates under high temperature and pressure is fundamental to an accurate description of planetary interiors and evolution models. For example, earth's mantle is a rocky silicate shell constituting about 84% of Earth's volume. Possible chemical compositions include SiO2 and some other silicates such as MgSiO3 and CaSiO3. Moreover, Moon forming scenarios often invoke giant impacts between silicate-rich objects.Similarly, the existence of a rocky core or mantle with silicate as the major component is frequently assumed in models of giant planets, such as Jupiter or Saturn and Uranus and Neptune. Consequently, constructing planetary interior and evolution models requires knowledge of silicate's equation of state and its optical and transport properties at high pressures and temperatures. JF - American Geophysical Union Fall Meeting AU - Qi, T AU - Hamel, S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR33A EP - 4324 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/1722153887?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Equation+of+state+and+transport+properties+of+silicates+under+extreme+conditions&rft.au=Qi%2C+T%3BHamel%2C+S%3BAnonymous&rft.aulast=Qi&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 - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - Optical properties of superionic water at 2 Mbar AN - 1722153883; 2015-097788 AB - Dynamic compression experiments now allow us to recreate planet deep interior conditions in the laboratory, providing valuable data on material properties at unprecedented conditions. These data are of paramount importance to build confidence in numerical simulation methods and establish new planetary structure and evolution models. I will present new results on the optical properties and equation of state (pressure, density, temperature) of warm dense water at extreme conditions of pressure and temperature directly relevant to the deep interior of Uranus, Neptune and giant water-world exoplanets. Laser shock compression of water starting from ice VII (rho 0=1.6 g/cc) obtained by coupling static and dynamic compression reached unprecedented conditions. We clearly identify the superionic phase near 1-2 Mbar, document its optical properties and obtain evidence for the transition to the dense metallic liquid. The EOS data in the conducting liquid state provide a stringent test on recent ab-initio simulations. As superionic ices could dominate the deep interior or giant icy planets and exoplanets, the new conductivity and equation of state experimental benchmark provide basis for improved modeling of the internal structure and magnetic field generation. Prepared by LLNL under Contract DE-AC52-07NA27344 JF - American Geophysical Union Fall Meeting AU - Millot, M A AU - Hamel, S AU - Rygg, J R AU - Jeanloz, R AU - Collins, G W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR33A EP - 4325 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/1722153883?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Optical+properties+of+superionic+water+at+2+Mbar&rft.au=Millot%2C+M+A%3BHamel%2C+S%3BRygg%2C+J+R%3BJeanloz%2C+R%3BCollins%2C+G+W%3BAnonymous&rft.aulast=Millot&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 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 - Transport properties of liquid hydrogen from first-principles simulations AN - 1722153097; 2015-097794 AB - Constraining the transport properties of dense liquid hydrogen is needed to model the internal dynamics of gas giants. Here, we calculate the diffusion, viscosity, and heat capacity of liquid hydrogen from first principles simulations. Our calculations consider both nuclear quantum effects and nonlocal exchange-correlation density functionals, which are known to greatly alter the pre-existing phase diagram of this system. JF - American Geophysical Union Fall Meeting AU - Tollefson, J AU - Morales, M A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR33A EP - 4331 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/1722153097?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Transport+properties+of+liquid+hydrogen+from+first-principles+simulations&rft.au=Tollefson%2C+J%3BMorales%2C+M+A%3BAnonymous&rft.aulast=Tollefson&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 - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - The influence of temperature, pH, and growth rate on the stable isotope composition of calcite AN - 1718052201; 2015-092668 AB - The oxygen isotope composition of carbonate minerals varies with temperature as well as other environmental variables. For carbonates that precipitate slowly, under conditions that approach thermodynamic equilibrium, the temperature-dependence of 18O uptake is the dominant signal and the measured 18O content can be used as a paleotemperature proxy. In the more common case where carbonate minerals grow in a regime where they are not in isotopic equilibrium with their host solution, their stable isotope compositions are a convolution of the effects of multiple environmental variables. We present results from inorganic calcite growth experiments demonstrating the occurrence of non-equilibrium oxygen isotope effects that vary systematically with pH and crystal growth rate. We have developed an isotopic ion-by-ion crystal growth model that quantifies the competing roles of temperature, pH, and growth rate, and provides a general description of calcite-water oxygen isotope fractionation under non-equilibrium conditions. The model predicts that (1) there are both equilibrium and kinetic contributions to calcite oxygen isotopes at biogenic growth rates, (2) calcite does not inherit the stable isotopic composition of dissolved inorganic carbon (DIC), (3) for oxygen isotopes there is a kinetically controlled variation of about 1 ppm per pH unit between pH=7.7 and 9.3 at constant growth rate for inorganic calcite as well as the foraminifera Orbulina universa, and (4) extreme light isotope enrichments in calcite in alkaline environments are likely due to disequilibrium among DIC species in aqueous solution. The experimental and modeling approaches can be extended to carbon isotope as well as clumped isotope uptake into calcite but additional data are needed to constrain the kinetic fractionation factors for carbon isotopes and doubly-substituted isotopologues. The results will be discussed in the context of separating the relative influence of inorganic and biologic processes on isotopic fractionation. JF - American Geophysical Union Fall Meeting AU - Watkins, J M AU - Hunt, J D AU - Ryerson, F J AU - DePaolo, D J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B31H EP - 02 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718052201?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+influence+of+temperature%2C+pH%2C+and+growth+rate+on+the+stable+isotope+composition+of+calcite&rft.au=Watkins%2C+J+M%3BHunt%2C+J+D%3BRyerson%2C+F+J%3BDePaolo%2C+D+J%3BAnonymous&rft.aulast=Watkins&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 - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Lake level changes in the Mono Basin during the last deglacial period AN - 1718050460; 2015-092817 AB - Mono Basin, located in the southwestern corner of the US Great Basin, has long been known to have experienced large lake level changes, particularly during the last deglaciation. But until recently it was not possible to establish a reliable lake level time series. We discovered many visually clean, white, shiny, dense calcite samples in the basin, associated with tufa deposits from high terraces. Their low thorium, but high uranium contents allow precise and reproducible U/Th age determinations. A highly resolved history of a minimum lake level through the last deglaciation can therefore be inferred based on sample locations and their ages. We found that the lake level reached approximately 2030 m asl at approximately 20.4 ka, evidenced by calcite coatings on a tufa mound at the upper Wilson Creek. The lake then rose to approximately 2075 m by approximately 19.1 ka, shown by calcite cements on conglomerates from the Hansen Cut terrace. The lake climbed to at least approximately 2140 m at approximately 15.9 ka, indicated by beach calcites from the east Sierra slope. Such timing of the highest lake stand, occurring within Heinrich Stadial 1, is reinforced by U/Th dates on calcite coatings from widespread locations in the basin, including the Bodie Hills and Cowtrack Mountains. The lake then dropped rapidly to approximately 2075 m at approximately 14.5 ka. It stood near this height over the next approximately 300 years, evidenced by a few-centimeter thick, laminated calcite rims on the Goat Ranch tufa mounds. It subsequently plunged to approximately 2007 m at approximately 13.8 ka, indicated by calcite coatings from cemetery road tufa mounds. The lake level came back to approximately 2030 m at approximately 12.9 ka, as seen in upper Wilson Creek tufa mounds. The lake level had a few fluctuations within the Younger Dryas, and even shot up to approximately 2075 m at approximately 12.0 ka. It then fell to levels in accord with Holocene climatic conditions. Relative to the present lake level of approximately 1950 m, Mono Lake broadly stood high during Heinrich Stadial 1 and Younger Dryas, when the climate was extremely cold over the North Atlantic, and the Asian monsoon was much weakened. When the climate shifted from cold to warm, the lake dropped significantly, during the transition between Heinrich Stadial 1 and the Bolling time interval, and then during the Allerod period. The U/Th ages on the tufa samples therefore not only establish a highly resolved chronology of hydroclimate history in the Mono Basin, but also put the lake level oscillations in a global context. JF - American Geophysical Union Fall Meeting AU - Wang, Xianfeng AU - Ali, G AU - Hemming, Sidney R AU - Zimmerman, S R H AU - Stine, Scott W AU - Hemming, G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP51D EP - 1157 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/1718050460?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Lake+level+changes+in+the+Mono+Basin+during+the+last+deglacial+period&rft.au=Wang%2C+Xianfeng%3BAli%2C+G%3BHemming%2C+Sidney+R%3BZimmerman%2C+S+R+H%3BStine%2C+Scott+W%3BHemming%2C+G%3BAnonymous&rft.aulast=Wang&rft.aufirst=Xianfeng&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 - Millennial scale oscillations in bulk delta (super 15) N and delta (super 13) C over the Mid- to Late Holocene seen in proteinaceous corals from the North Pacific Subtropical Gyre AN - 1718049368; 2015-092893 AB - The North Pacific Subtropical Gyre (NPSG) is the largest continuous ecosystem on this planet and is an important regulator of biogeochemical cycling and carbon sequestration. With evidence of its expansion in a warming climate, it is necessary to develop a more complete understanding of the variability in productivity and nutrient dynamics in this important ecosystem through time. We constructed a long-term, high resolution record of bulk record of stable nitrogen (delta 15N) and carbon isotopes (delta 13C) from multiple proteinaceous deep sea corals around Hawaii extending back approximately 5300 years with few gaps. Our data confirms the decreasing trend in delta 15N since the Little Ice Age (1850s), which matches previously published results in part attributed to anthropogenic climate change (e.g. Sherwood et al. 2014). However, while the rate of change since the Little Ice Age (delta 15N declines approximately 1 ppm over approximately 150 yrs) remains by far the most rapid throughout the longer record, there also appear to be longer-term (near-millennial scale) climatic oscillations of even greater magnitude (delta 15N shifts approximately 1.5-2 ppm over approximately 1000 yrs). After removal of the Seuss Effect, delta 13C values also declined approximately 1.5 ppm since the Little Ice Age. Furthermore, there also appear to be oscillations in delta 13C of approximately 1-2 ppm over millennial timescales. These results reveal the existence of previously unrecognized long-term oscillations in NPSG biogeochemical cycles, which are likely linked to changes in phytoplankton species composition, food web dynamics, and/or variability in source nutrients and productivity possibly caused by changes in climate. This study provides insight into nutrient dynamics in the NPSG over the past five millennia, and offers a historical baseline to better analyze the effects of current anthropogenic climate forcing. JF - American Geophysical Union Fall Meeting AU - Glynn, D S AU - McCarthy, M D AU - McMahon, K AU - Guilderson, T P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP53B EP - 1203 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718049368?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Millennial+scale+oscillations+in+bulk+delta+%28super+15%29+N+and+delta+%28super+13%29+C+over+the+Mid-+to+Late+Holocene+seen+in+proteinaceous+corals+from+the+North+Pacific+Subtropical+Gyre&rft.au=Glynn%2C+D+S%3BMcCarthy%2C+M+D%3BMcMahon%2C+K%3BGuilderson%2C+T+P%3BAnonymous&rft.aulast=Glynn&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 - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - A Bayesian method to apply the results of multiple-event seismic location to a subsequent event AN - 1703691322; 2015-078734 AB - BayesLoc is a Bayesian multiple-event seismic locator that uses a Markov chain Monte Carlo (MCMC) algorithm to sample possible seismic hypocenters, travel-time corrections, and the precision of observed arrival data (absolute picks and differential times based on cross-correlated waveforms). By simultaneously locating multiple seismic events, regional biases in the assumed travel-time model (e.g., ak135) can be estimated and corrected for, and data from different seismic stations and phases can be weighted to reflect their accuracy/precision for an event cluster. As such, multiple-event locators generally yield more accurate locations than single-event locators, which lack the data to resolve the underlying travel-time model and adaptively "weight" the arrival data differently for each station and phase. On the other hand, single-event locators are computationally more attractive, making them more suitable for rapid (realtime) location of seismic activity. We present a novel approach to approximate the location accuracy of the BayesLoc multiple-event analysis at a computational cost that is comparable to BayesLoc single-event analysis. The proposed approach consists of two steps: a precomputed multiple-event training analysis and subsequent real-time, single-event location for new events. The precomputed training analysis consists of carrying out a multiple-event BayesLoc run in a given target event cluster, yielding a posterior sample of travel-time corrections and weights. Given a new event in the vicinity of the training cluster, a BayesLoc single-event run is carried out which samples the travel-time corrections and weights from the multiple-event training run. Hence, it has all the benefits of the multiple-event run at the cost of a single-event run. We present the theoretical underpinnings of the new approach and we compare event location results for the full multiple-event, single-event, and the new approaches. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. (LLNL-ABS-658134). JF - American Geophysical Union Fall Meeting AU - Johannesson, G AU - Myers, S C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S53A EP - 4485 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703691322?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Bayesian+method+to+apply+the+results+of+multiple-event+seismic+location+to+a+subsequent+event&rft.au=Johannesson%2C+G%3BMyers%2C+S+C%3BAnonymous&rft.aulast=Johannesson&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 - 2015-08-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - Seismic methods of identifying explosions and estimating their yield AN - 1696874918; 2015-069760 AB - Seismology plays a key national security role in detecting, locating, identifying and determining the yield of explosions from a variety of causes, including accidents, terrorist attacks and nuclear testing treaty violations (e.g. Koper et al., 2003, 1999; Walter et al. 1995). A collection of mainly empirical forensic techniques has been successfully developed over many years to obtain source information on explosions from their seismic signatures (e.g. Bowers and Selby, 2009). However a lesson from the three DPRK declared nuclear explosions since 2006, is that our historic collection of data may not be representative of future nuclear test signatures (e.g. Selby et al., 2012). To have confidence in identifying future explosions amongst the background of other seismic signals, and accurately estimate their yield, we need to put our empirical methods on a firmer physical footing. Goals of current research are to improve our physical understanding of the mechanisms of explosion generation of S- and surface-waves, and to advance our ability to numerically model and predict them. As part of that process we are re-examining regional seismic data from a variety of nuclear test sites including the DPRK and the former Nevada Test Site (now the Nevada National Security Site (NNSS)). Newer relative location and amplitude techniques can be employed to better quantify differences between explosions and used to understand those differences in term of depth, media and other properties. We are also making use of the Source Physics Experiments (SPE) at NNSS. The SPE chemical explosions are explicitly designed to improve our understanding of emplacement and source material effects on the generation of shear and surface waves (e.g. Snelson et al., 2013). Finally we are also exploring the value of combining seismic information with other technologies including acoustic and InSAR techniques to better understand the source characteristics. Our goal is to improve our explosion models and our ability to understand and predict where methods of identifying explosions and estimating their yield work well, and any circumstances where they may not. JF - American Geophysical Union Fall Meeting AU - Walter, W R AU - Ford, S R AU - Pasyanos, M AU - Pyle, Moira L AU - Myers, S C AU - Mellors, R J AU - Pitarka, A AU - Rodgers, A J AU - Hauk, T F AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S44B 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/1696874918?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+methods+of+identifying+explosions+and+estimating+their+yield&rft.au=Walter%2C+W+R%3BFord%2C+S+R%3BPasyanos%2C+M%3BPyle%2C+Moira+L%3BMyers%2C+S+C%3BMellors%2C+R+J%3BPitarka%2C+A%3BRodgers%2C+A+J%3BHauk%2C+T+F%3BAnonymous&rft.aulast=Walter&rft.aufirst=W&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 - Virtual seismometer and adjoint methods for induced seismicity monitoring AN - 1696873167; 2015-069808 AB - Induced seismicity is associated with subsurface fluid injection, and puts at risk efforts to develop geologic carbon sequestration and enhanced geothermal systems. We are developing methods to monitor the microseismically active zone so that we can identify faults at risk of slipping. We are using the Virtual Seismometer Method (VSM), which is an interferometric technique that is very sensitive to the source parameters (location, mechanism and magnitude) and to the earth structure in the source region. Given an ideal geometry, that is, when two quakes are roughly in line with a recording station, the correlation of their waveforms provide a precise estimate of the Green's function between them, modified by their source mechanisms. When measuring microseismicity, this geometry is rarely ideal and we need to account for variations in the geometry as well. In addition, we also investigate the adjoint method to calculate sensitivity kernels, which define the sensitivity of an observable to model parameters. Classically, adjoint tomography relies on the interaction between a forward waveform, from the source to the recording station, and a backpropagated waveform, from the recorded station to the source. By combining the two approaches we can focus on properties directly between induced micro events, and doing so, monitor the evolution of the seismicity and precisely image potential fault zones. JF - American Geophysical Union Fall Meeting AU - Morency, Chris AU - Matzel, E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S51A EP - 4409 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696873167?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Virtual+seismometer+and+adjoint+methods+for+induced+seismicity+monitoring&rft.au=Morency%2C+Chris%3BMatzel%2C+E%3BAnonymous&rft.aulast=Morency&rft.aufirst=Chris&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 - Seismic characterization of EGS reservoirs AN - 1696872422; 2015-069787 AB - To aid in the seismic characterization of Engineered Geothermal Systems (EGS), we enhance the traditional microearthquake detection and location methodologies at two EGS systems. We apply the Matched Field Processing (MFP) seismic imaging technique to detect new seismic events using known discrete microearthquake sources. Events identified using MFP are typically smaller magnitude events or events that occur within the coda of a larger event. Additionally, we apply a Bayesian multiple-event seismic location algorithm, called MicroBayesLoc, to estimate the 95% probability ellipsoids for events with high signal-to-noise ratios (SNR). Such probability ellipsoid information can provide evidence for determining if a seismic lineation could be real or simply within the anticipated error range. We apply this methodology to the Basel EGS data set and compare it to another EGS dataset. JF - American Geophysical Union Fall Meeting AU - Templeton, D C AU - Pyle, Moira L AU - Matzel, E AU - Myers, S AU - Johannesson, G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S51A EP - 4388 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696872422?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+characterization+of+EGS+reservoirs&rft.au=Templeton%2C+D+C%3BPyle%2C+Moira+L%3BMatzel%2C+E%3BMyers%2C+S%3BJohannesson%2C+G%3BAnonymous&rft.aulast=Templeton&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 - 2015-07-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Re-visiting the 1739 earthquake ruptures in the Yinchuan graben, Northern China AN - 1692743879; 2015-064977 AB - A large, normal-faulting earthquake occurred on 3rd January 1739 on the eastern flank of the Helan Mountains. These mountains border the Yinchuan Graben, a major structural feature on the north-western side of the Ordos Plateau in northern China. Surface ruptures from this event extend discontinuously for a total of 88 kilometers with a maximum vertical component of slip of 4.4 meters. Greatest damage was sustained in the cities of Yinchuan and Pingluo and an estimated 50,000 people were killed. Fault scarps have previously been identified in late Quaternary alluvial fans at Suyukou, Xiaoshigou, Jianquan and Hongguozigou, where it is believed that the Great Wall of China was offset. The Suyukou scarps are particularly impressive, preserving a free face along most of their length. Compound scarps and a series of terrace surfaces also document a history of at least three faulting events prior to 1739. These scarps provide a unique opportunity not only to characterise a large-magnitude (approximately Mw 7.5) continental normal-faulting earthquake, but also to determine a recurrence interval for this type of event. In this study we combine remote sensing techniques, field observations and paleoseismological work in order to tackle these questions. We have produced a nominally 1 meter resolution digital elevation model of the entire length of the rupture using Pleiades stereo imagery. This detailed topography has allowed us to map the 1739 rupture, its associated fissures, and the footwall terrace surfaces along the Suyukou scarps in unprecedented detail. We have used a series of topographic profiles across the scarps to measure vertical offsets and the shape of the rupture front. This data is then used to reconstruct the slip variation along strike in the 1739 earthquake and compared with the offsets from older events. These offset measurements are supplemented by our field samples from the Suyukou scarps. Quaternary geochronology-including radiocarbon, optically stimulated luminescence, and 10Be exposure dating-will be used, along with previous paleoseismological work, to constrain the timing of the recent earthquakes on the fault. JF - American Geophysical Union Fall Meeting AU - Middleton, Tim AU - Walker, Richard T AU - Parsons, Barry AU - Lei, Q AU - Zhou, Yu AU - Ren, Z AU - Rood, Dylan H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract T41C EP - 4646 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/1692743879?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Re-visiting+the+1739+earthquake+ruptures+in+the+Yinchuan+graben%2C+Northern+China&rft.au=Middleton%2C+Tim%3BWalker%2C+Richard+T%3BParsons%2C+Barry%3BLei%2C+Q%3BZhou%2C+Yu%3BRen%2C+Z%3BRood%2C+Dylan+H%3BAnonymous&rft.aulast=Middleton&rft.aufirst=Tim&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 - 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 - The use of fractional accumulated precipitation for the evaluation of the annual cycle of monsoons AN - 1627971444; 20970886 AB - Using pentad rainfall data we demonstrate the benefits of using accumulated rainfall and fractional accumulated rainfall for the evaluation of the annual cycle of rainfall over various monsoon domains. Our approach circumvents issues related to using threshold-based analysis techniques for investigating the life-cycle of monsoon rainfall. In the Coupled Model Intercomparison Project-5 models we find systematic errors in the phase of the annual cycle of rainfall. The models are delayed in the onset of summer rainfall over India, the Gulf of Guinea, and the South American Monsoon, with early onset prevalent for the Sahel and the North American Monsoon. This, in combination with the rapid fractional accumulation rate, impacts the ability of the models to simulate the fractional accumulation observed during summer. The rapid fractional accumulation rate and the time at which the accumulation begins are metrics that indicate how well the models concentrate the monsoon rainfall over the peak rainfall season, and the extent to which there is a phase error in the annual cycle. The lack of consistency in the phase error across all domains suggests that a "global" approach to the study of monsoons may not be sufficient to rectify the regional differences. Rather, regional process studies are necessary for diagnosing the underlying causes of the regionally-specific systematic model biases over the different monsoon domains. Despite the afore-mentioned biases, most models simulate well the interannual variability in the date of monsoon onset, the exceptions being models with the most pronounced dry biases. Two methods for estimating monsoon duration are presented, one of which includes nonlinear aspects of the fractional accumulation. The summer fractional accumulation of rainfall provides an objective way to estimate the extent of the monsoon domain, even in models with substantial dry biases for which monsoon is not defined using threshold-based techniques. JF - Climate Dynamics AU - Sperber, Kenneth R AU - Annamalai, H AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, P. O. Box 808, L-103, Livermore, CA, 94551, USA, sperber1@llnl.gov Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 3219 EP - 3244 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 43 IS - 12 SN - 0930-7575, 0930-7575 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Annual rainfall data KW - Rainfall data KW - Rainfall KW - Monsoon onset KW - Evaluation KW - ISW, India KW - North American monsoon KW - Summer rainfall KW - Guinea KW - Seasonal variability KW - Seasonal variations KW - Monsoon rainfall KW - North America KW - Annual variations KW - Climates KW - Precipitation KW - Errors KW - Systematics KW - Model Studies KW - Interannual variability KW - Accumulation KW - Monsoons KW - Q2 09243:Structure, mechanics and thermodynamics KW - AQ 00006:Sewage KW - M2 551.58:Climatology (551.58) KW - SW 0815:Precipitation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627971444?accountid=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=Climate+Dynamics&rft.atitle=The+use+of+fractional+accumulated+precipitation+for+the+evaluation+of+the+annual+cycle+of+monsoons&rft.au=Sperber%2C+Kenneth+R%3BAnnamalai%2C+H&rft.aulast=Sperber&rft.aufirst=Kenneth&rft.date=2014-12-01&rft.volume=43&rft.issue=12&rft.spage=3219&rft.isbn=&rft.btitle=&rft.title=Climate+Dynamics&rft.issn=09307575&rft_id=info:doi/10.1007%2Fs00382-014-2099-3 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Number of references - 30 N1 - Last updated - 2016-02-18 N1 - SubjectsTermNotLitGenreText - Annual variations; Seasonal variations; Monsoons; Monsoon rainfall; Interannual variability; Summer rainfall; North American monsoon; Annual rainfall data; Rainfall data; Monsoon onset; Seasonal variability; Precipitation; Evaluation; Rainfall; Climates; Systematics; Errors; Accumulation; Model Studies; North America; ISW, India; Guinea DO - http://dx.doi.org/10.1007/s00382-014-2099-3 ER - TY - JOUR T1 - Total volcanic stratospheric aerosol optical depths and implications for global climate change AN - 1680753053; 2015-041535 AB - Understanding the cooling effect of recent volcanoes is of particular interest in the context of the post-2000 slowing of the rate of global warming. Satellite observations of aerosol optical depth above 15 km have demonstrated that small-magnitude volcanic eruptions substantially perturb incoming solar radiation. Here we use lidar, Aerosol Robotic Network, and balloon-borne observations to provide evidence that currently available satellite databases neglect substantial amounts of volcanic aerosol between the tropopause and 15 km at middle to high latitudes and therefore underestimate total radiative forcing resulting from the recent eruptions. Incorporating these estimates into a simple climate model, we determine the global volcanic aerosol forcing since 2000 to be -0.19 + or - 0.09 Wm (super -2) . This translates into an estimated global cooling of 0.05 to 0.12 degrees C. We conclude that recent volcanic events are responsible for more post-2000 cooling than is implied by satellite databases that neglect volcanic aerosol effects below 15 km. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Ridley, D A AU - Solomon, S AU - Barnes, J E AU - Burlakov, V D AU - Deshler, T AU - Dolgii, S I AU - Herber, A B AU - Nagai, T AU - Neely, R R, III AU - Nevzorov, A V AU - Ritter, C AU - Sakai, T AU - Santer, B D AU - Sato, M AU - Schmidt, A AU - Uchino, O AU - Vernier, J P Y1 - 2014/11/28/ PY - 2014 DA - 2014 Nov 28 SP - 7763 EP - 7769 PB - American Geophysical Union, Washington, DC VL - 41 IS - 22 SN - 0094-8276, 0094-8276 KW - laser methods KW - atmosphere KW - global change KW - satellite methods KW - climate change KW - optical properties KW - lidar methods KW - eruptions KW - solar radiation KW - volcanoes KW - aerosols KW - remote sensing KW - global warming KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680753053?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Total+volcanic+stratospheric+aerosol+optical+depths+and+implications+for+global+climate+change&rft.au=Ridley%2C+D+A%3BSolomon%2C+S%3BBarnes%2C+J+E%3BBurlakov%2C+V+D%3BDeshler%2C+T%3BDolgii%2C+S+I%3BHerber%2C+A+B%3BNagai%2C+T%3BNeely%2C+R+R%2C+III%3BNevzorov%2C+A+V%3BRitter%2C+C%3BSakai%2C+T%3BSanter%2C+B+D%3BSato%2C+M%3BSchmidt%2C+A%3BUchino%2C+O%3BVernier%2C+J+P&rft.aulast=Ridley&rft.aufirst=D&rft.date=2014-11-28&rft.volume=41&rft.issue=22&rft.spage=7763&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL061541 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. N1 - Last updated - 2016-10-25 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - aerosols; atmosphere; climate change; eruptions; global change; global warming; laser methods; lidar methods; optical properties; remote sensing; satellite methods; solar radiation; volcanoes DO - http://dx.doi.org/10.1002/2014GL061541 ER - TY - JOUR T1 - Seasonal variation of high elevation ground water recharge as indicator of climate response AN - 1660635124; 2015-019694 AB - High elevation groundwater basins in the western United States are facing changes in the amount and timing of snowmelt due to climate change. The objective of this study is to examine seasonal variability in a high elevation aquifer (Martis Valley Watershed near Truckee, CA) by analyzing (1) tritium and helium isotopes to determine groundwater sources and age, (2) dissolved noble gases to determine recharge temperatures and excess air concentrations. Recharge temperatures calculated at pressures corresponding to well head elevations are similar to mean annual air temperatures at lower elevations of the watershed, suggesting that most recharge is occurring at these elevations, after equilibrating in the vadose zone. The groundwater flow depth required to increase the water temperature from the recharge temperature to the discharge temperature was calculated for each well assuming a typical geothermal gradient. Groundwater samples contain large amounts of excess helium from terrigenic sources, including mantle helium and radiogenic helium. Terrigenic helium and tritium concentrations are used to determine the amount of mixing between the younger and older groundwater sources. Many of the wells sampled show a mix of groundwater ages ranging from >1000s of years old to groundwater with tritium concentrations that are in agreement with tritium in modern day precipitation. Higher seasonal variability found in wells with younger groundwater and shallower flow depths indicates that the recent recharge most vulnerable to climate impacts helps to supplement the older, less sustainable waters in the aquifer during periods of increased production. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Hydrology AU - Segal, Daniel C AU - Moran, Jean E AU - Visser, Ate AU - Singleton, Michael J AU - Esser, Bradley K Y1 - 2014/11/27/ PY - 2014 DA - 2014 Nov 27 SP - 3129 EP - 3141 PB - Elsevier, Amsterdam VL - 519 IS - Part D SN - 0022-1694, 0022-1694 KW - United States KW - Sierra Nevada KW - aquifer vulnerability KW - Ne-22 KW - isotopes KW - stable isotopes KW - environmental effects KW - climate change KW - ground water KW - California KW - topography KW - noble gases KW - neon KW - movement KW - tracers KW - drainage basins KW - Martis Valley basin KW - geothermal gradient KW - climate KW - elevation KW - xenon KW - Truckee California KW - aquifers KW - water table KW - recharge KW - heating KW - seasonal variations KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660635124?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Seasonal+variation+of+high+elevation+ground+water+recharge+as+indicator+of+climate+response&rft.au=Segal%2C+Daniel+C%3BMoran%2C+Jean+E%3BVisser%2C+Ate%3BSingleton%2C+Michael+J%3BEsser%2C+Bradley+K&rft.aulast=Segal&rft.aufirst=Daniel&rft.date=2014-11-27&rft.volume=519&rft.issue=Part+D&rft.spage=3129&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2014.10.051 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 - 37 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2015-03-05 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - aquifer vulnerability; aquifers; California; climate; climate change; drainage basins; elevation; environmental effects; geothermal gradient; ground water; heating; isotopes; Martis Valley basin; movement; Ne-22; neon; noble gases; recharge; seasonal variations; Sierra Nevada; stable isotopes; topography; tracers; Truckee California; United States; water table; xenon DO - http://dx.doi.org/10.1016/j.jhydrol.2014.10.051 ER - TY - CPAPER T1 - Thermodynamics of Flat Thin Liquid Films T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627965585; 6309543 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Myint, Philip AU - Firoozabadi, Abbas Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Thermodynamics KW - Films UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627965585?accountid=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=Thermodynamics+of+Flat+Thin+Liquid+Films&rft.au=Myint%2C+Philip%3BFiroozabadi%2C+Abbas&rft.aulast=Myint&rft.aufirst=Philip&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 - JOUR T1 - Calcium-aluminum-rich inclusions with fractionation and unknown nuclear effects (FUN CAIs); I, Mineralogy, petrology, and oxygen isotopic compositions AN - 1700097452; 2015-072790 AB - We present a detailed characterization of the mineralogy, petrology, and oxygen isotopic compositions of twelve FUN CAIs, including C1 and EK1-4-1 from Allende (CV), that were previously shown to have large isotopic fractionation patterns for magnesium and oxygen, and large isotopic anomalies of several elements. The other samples show more modest patterns of isotopic fractionation and have smaller but significant isotopic anomalies. All FUN CAIs studied are coarse-grained igneous inclusions: Type B, forsterite-bearing Type B, compact Type A, and hibonite-rich. Some inclusions consist of two mineralogically distinct lithologies, forsterite-rich and forsterite-free/poor. All the CV FUN CAIs experienced postcrystallization open-system iron-alkali-halogen metasomatic alteration resulting in the formation of secondary minerals commonly observed in non-FUN CAIs from CV chondrites. The CR FUN CAI GG#3 shows no evidence for alteration. In all samples, clear evidence of oxygen isotopic fractionation was found. Most samples were initially (super 16) O-rich. On a three-oxygen isotope diagram, various minerals in each FUN CAI (spinel, forsterite, hibonite, dmisteinbergite, most fassaite grains, and melilite (only in GG#3)), define mass-dependent fractionation lines with a similar slope of approximately 0.5. The different inclusions have different Delta (super 17) O values ranging from approximately -25 ppm to approximately -16 ppm. Melilite and plagioclase in the CV FUN CAIs have (super 16) O-poor compositions (Delta (super 17) O approximately -3 ppm) and plot near the intercept of the Allende CAI line and the terrestrial fractionation line. We infer that mass-dependent fractionation effects of oxygen isotopes in FUN CAI minerals are due to evaporation during melt crystallization. Differences in Delta (super 17) O values of mass-dependent fractionation lines defined by minerals in individual FUN CAIs are inferred to reflect differences in Delta (super 17) O values of their precursors. Differences in delta (super 18) O values of minerals defining the mass-dependent fractionation lines in several FUN CAIs are consistent with their inferred crystallization sequence, suggesting these minerals crystallized during melt evaporation. In other FUN CAIs, no clear correlation between delta (super 18) O values of individual minerals and their inferred crystallization sequence is observed, possibly indicating gas-melt back reaction and oxygen-isotope exchange in a (super 16) O-rich gaseous reservoir. After oxygen-isotope fractionation, some FUN CAIs could have experienced partial melting and gas-melt oxygen-isotope exchange in a (super 16) O-poor gaseous reservoir that resulted in crystallization of (super 16) O-depleted fassaite, melilite and plagioclase. The final oxygen isotopic compositions of melilite and plagioclase in the CV FUN CAIs may have been established on the CV parent asteroid as a result of isotope exchange with a (super 16) O-poor fluid during hydrothermal alteration. We conclude that FUN CAIs are part of a general family of refractory inclusions showing various degrees of fractionation effects due to evaporative processes superimposed on sampling of isotopically heterogeneous material. These processes have been experienced both by FUN and non-FUN igneous CAIs. Generally, the inclusions identified as FUN show larger isotope fractionation effects than non-FUN CAIs. There is a wide spread in UN isotopic anomalies in a large number of CAIs not exhibiting large fractionation effects in oxygen, magnesium, and silicon. The question of why some FUN CAIs show more extreme UN isotopic effects is attributed by us to limited sampling and not a special source of isotopically anomalous material. We consider the majority of igneous CAIs to be the result of several stages of thermal processing (evaporation, condensation, and melting) of aggregates of solid precursors composed of incompletely isotopically homogenized materials. The unknown nuclear effects in CAIs are common to both FUN and non-FUN CAIs, and are not a special characteristic of FUN inclusions but represent the spectrum of results from sampling a very heterogeneous medium in the accreting Solar System. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Krot, Alexander N AU - Nagashima, Kazuhide AU - Wasserburg, Gerald J AU - Huss, Gary R AU - Papanastassiou, Dimitri AU - Davis, Andrew M AU - Hutcheon, Ian D AU - Bizzarro, Martin Y1 - 2014/11/15/ PY - 2014 DA - 2014 Nov 15 SP - 206 EP - 247 PB - Elsevier, New York, NY VL - 145 SN - 0016-7037, 0016-7037 KW - calcium KW - isotope fractionation KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - calcium-aluminum inclusions KW - mass spectra KW - CV chondrites KW - stable isotopes KW - electron probe data KW - Allende Meteorite KW - meteorites KW - Al-26 KW - radioactive isotopes KW - mineral composition KW - aluminum KW - inclusions KW - spectra KW - chondrites KW - chemical composition KW - alkaline earth metals KW - textures KW - isotope ratios KW - O-18/O-16 KW - carbonaceous chondrites KW - X-ray spectra KW - EDS spectra KW - ICP mass spectra KW - metals KW - 05B:Petrology of meteorites and tektites KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700097452?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Calcium-aluminum-rich+inclusions+with+fractionation+and+unknown+nuclear+effects+%28FUN+CAIs%29%3B+I%2C+Mineralogy%2C+petrology%2C+and+oxygen+isotopic+compositions&rft.au=Krot%2C+Alexander+N%3BNagashima%2C+Kazuhide%3BWasserburg%2C+Gerald+J%3BHuss%2C+Gary+R%3BPapanastassiou%2C+Dimitri%3BDavis%2C+Andrew+M%3BHutcheon%2C+Ian+D%3BBizzarro%2C+Martin&rft.aulast=Krot&rft.aufirst=Alexander&rft.date=2014-11-15&rft.volume=145&rft.issue=&rft.spage=206&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.09.027 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 - 60 N1 - PubXState - NY N1 - Document feature - illus. incl. 11 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-07-30 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - Al-26; alkaline earth metals; Allende Meteorite; aluminum; calcium; calcium-aluminum inclusions; carbonaceous chondrites; chemical composition; chondrites; CV chondrites; EDS spectra; electron probe data; ICP mass spectra; inclusions; ion probe data; isotope fractionation; isotope ratios; isotopes; mass spectra; metals; meteorites; mineral composition; O-18/O-16; oxygen; radioactive isotopes; spectra; stable isotopes; stony meteorites; textures; X-ray spectra DO - http://dx.doi.org/10.1016/j.gca.2014.09.027 ER - TY - JOUR T1 - Styles and rates of long-term denudation in carbonate terrains under a Mediterranean to hyper-arid climatic gradient AN - 1696877821; 2015-068986 AB - Carbonate minerals, unlike silicates, have the potential to dissolve almost completely and with high efficiency. Thus, in carbonate terrains denudation rate and style (the governing process of denudation, mechanical or chemical) should be more sensitive to climatic forcing. Using (super 36) Cl measurements in 39 carbonate bedrock and sediment samples, we calculate long-term denudation rates across a sharp climatic gradient from Mediterranean to hyper-arid conditions. Our samples were collected along the Arugot watershed, which drains the eastern flank of the Judea Range (central Israel) to the Dead Sea and is characterized by a pronounced rain shadow. Denudation rates of flat-lying bedrock outcrops sampled along interfluves differ by an order of magnitude from approximately 20 mm ka (super -1) in the Mediterranean zone to 1-3 mm ka (super -1) in the hyper-arid zone. These rates are strongly correlated with precipitation, and thus reflect the importance of carbonate mineral dissolution in the overall denudation process. In contrast, denudation rates of steep bedrock surfaces depend on the hillslope gradient, but only in the hyper-arid climate zone, indicating that mechanical processes dominate the overall hillslope denudation within this zone. The dominance of slope-dependent mechanical erosion in the hyper-arid zone is also reflected by an increase in spatially-average denudation rates from 17-19 mm ka (super -1) in the Mediterranean-semi-arid zones to 21-25 mm ka (super -1) in the hyper-arid zone. These higher rates are attributed to clast contribution from steep slopes under arid climate. This suggests an increased importance of mechanical processes to the overall denudation in the hyper-arid zone. We demonstrate that the transition between chemically-dominated denudation to mechanically-dominated denudation occurs between 100 and 200 mm of mean annual precipitation. Long-term denudation rates across the Judea Range indicate that between Mediterranean and hyper-arid climates, chemical weathering rates are limited by precipitation. Nevertheless, in more humid climates, chemical weathering rates are apparently limited by the rates of carbonate mineral dissolution. This study demonstrates that carbonate terrains have the capacity to shift between mechanically and chemically dominated denudation in response to changes in precipitation. Similar transitions in response to changes in temperature or the level of tectonic activity have been previously reported. We suggest that the abrupt nature of such transitions can be primarily attributed to the efficiency of carbonate dissolution processes and the competition between surface and subsurface drainage systems in carbonate terrains. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Ryb, U AU - Matmon, A AU - Erel, Y AU - Haviv, I AU - Benedetti, L AU - Hidy, A J Y1 - 2014/11/15/ PY - 2014 DA - 2014 Nov 15 SP - 142 EP - 152 PB - Elsevier, Amsterdam VL - 406 SN - 0012-821X, 0012-821X KW - terrestrial environment KW - isotopes KW - erosion KW - slopes KW - halogens KW - atmospheric precipitation KW - Israel KW - erosion rates KW - erosion features KW - Arugot watershed KW - exposure age KW - sedimentary rocks KW - radioactive isotopes KW - denudation KW - Judean Mountains KW - tectonics KW - climate forcing KW - Asia KW - Middle East KW - climate KW - chlorine KW - chemical weathering KW - rain shadow KW - talus slopes KW - arid environment KW - Cl-36 KW - weathering KW - terrains KW - Dead Sea KW - Mediterranean Sea KW - weathering rates KW - carbonate rocks KW - carbonates KW - mechanical weathering KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877821?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Styles+and+rates+of+long-term+denudation+in+carbonate+terrains+under+a+Mediterranean+to+hyper-arid+climatic+gradient&rft.au=Ryb%2C+U%3BMatmon%2C+A%3BErel%2C+Y%3BHaviv%2C+I%3BBenedetti%2C+L%3BHidy%2C+A+J&rft.aulast=Ryb&rft.aufirst=U&rft.date=2014-11-15&rft.volume=406&rft.issue=&rft.spage=142&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.09.008 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 - 75 N1 - Document feature - illus. incl. 1 table, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-11-19 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - arid environment; Arugot watershed; Asia; atmospheric precipitation; carbonate rocks; carbonates; chemical weathering; chlorine; Cl-36; climate; climate forcing; Dead Sea; denudation; erosion; erosion features; erosion rates; exposure age; halogens; isotopes; Israel; Judean Mountains; mechanical weathering; Mediterranean Sea; Middle East; radioactive isotopes; rain shadow; sedimentary rocks; slopes; talus slopes; tectonics; terrains; terrestrial environment; weathering; weathering rates DO - http://dx.doi.org/10.1016/j.epsl.2014.09.008 ER - TY - CPAPER T1 - Multi-scale fluid-structure interaction simulations based on mesoscopic approaches T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645165172; 6313840 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Weisgraber, Todd AU - Walsh, Stuart AU - Karazis, Kostas AU - Gottuso, Dennis Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Simulation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645165172?accountid=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=Multi-scale+fluid-structure+interaction+simulations+based+on+mesoscopic+approaches&rft.au=Weisgraber%2C+Todd%3BWalsh%2C+Stuart%3BKarazis%2C+Kostas%3BGottuso%2C+Dennis&rft.aulast=Weisgraber&rft.aufirst=Todd&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 - When the dust settles; stable xenon isotope constraints on the formation of nuclear fallout AN - 1680756131; 2015-043496 AB - Nuclear weapons represent one of the most immediate threats of mass destruction. In the event that a procured or developed nuclear weapon is detonated in a populated metropolitan area, timely and accurate nuclear forensic analysis and fallout modeling would be needed to support attribution efforts and hazard assessments. Here we demonstrate that fissiogenic xenon isotopes retained in radioactive fallout generated by a nuclear explosion provide unique constraints on (1) the timescale of fallout formation, (2) chemical fractionation that occurs when fission products and nuclear fuel are incorporated into fallout, and (3) the speciation of fission products in the fireball. Our data suggest that, in near surface nuclear tests, the presence of a significant quantity of metal in a device assembly, combined with a short time allowed for mixing with the ambient atmosphere (seconds), may prevent complete oxidation of fission products prior to their incorporation into fallout. Xenon isotopes thus provide a window into the chemical composition of the fireball in the seconds that follow a nuclear explosion, thereby improving our understanding of the physical and thermo-chemical conditions under which fallout forms. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Cassata, W S AU - Prussin, S G AU - Knight, K B AU - Hutcheon, I D AU - Isselhardt, B H AU - Renne, P R Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 88 EP - 95 PB - Elsevier, Oxford VL - 137 SN - 0265-931X, 0265-931X KW - geologic hazards KW - Xe-131 KW - isotopes KW - explosions KW - radioactivity KW - pollutants KW - pollution KW - xenon KW - stable isotopes KW - models KW - radioactive isotopes KW - optical properties KW - soil pollution KW - noble gases KW - microscope methods KW - mathematical methods KW - natural hazards KW - nuclear explosions KW - fallout KW - public health KW - chemical fractionation 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/1680756131?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=When+the+dust+settles%3B+stable+xenon+isotope+constraints+on+the+formation+of+nuclear+fallout&rft.au=Cassata%2C+W+S%3BPrussin%2C+S+G%3BKnight%2C+K+B%3BHutcheon%2C+I+D%3BIsselhardt%2C+B+H%3BRenne%2C+P+R&rft.aulast=Cassata&rft.aufirst=W&rft.date=2014-11-01&rft.volume=137&rft.issue=&rft.spage=88&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2014.06.011 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 - 33 N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - chemical fractionation; explosions; fallout; geologic hazards; isotopes; mathematical methods; microscope methods; models; natural hazards; noble gases; nuclear explosions; optical properties; pollutants; pollution; public health; radioactive isotopes; radioactivity; soil pollution; stable isotopes; Xe-131; xenon DO - http://dx.doi.org/10.1016/j.jenvrad.2014.06.011 ER - TY - JOUR T1 - Analysis of trace neptunium in the vicinity of underground nuclear tests at the Nevada National Security Site AN - 1680755746; 2015-043498 AB - A high sensitivity analytical method for (super 237) Np analysis was developed and applied to groundwater samples from the Nevada National Security Site (NNSS) using short-lived (super 239) Np as a yield tracer and HR magnetic sector ICP-MS. The (super 237) Np concentrations in the vicinity of the Almendro, Cambric, Dalhart, Cheshire, and Chancellor underground nuclear test locations range from <4 X 10 (super -4) to 2.6 mBq/L (6 X 10 (super -17) -4.2 X 10 (super -13) mol/L). All measured (super 237) Np concentrations are well below the drinking water maximum contaminant level for alpha emitters identified by the U.S. EPA (560 mBq/L). Nevertheless, (super 237) Np remains an important indicator for radionuclide transport rates at the NNSS. Retardation factor ratios were used to compare the mobility of (super 237) Np to that of other radionuclides. The results suggest that (super 237) Np is less mobile than tritium and other non-sorbing radionuclides ( (super 14) C, (super 36) Cl, (super 99) Tc and (super 129) I) as expected. Surprisingly, (super 237) Np and plutonium ( (super 239,240) Pu) retardation factors are very similar. It is possible that Np(IV) exists under mildly reducing groundwater conditions and exhibits a retardation behavior that is comparable to Pu(IV). Independent of the underlying process, (super 237) Np is migrating downgradient from NNSS underground nuclear tests at very low but measureable concentrations. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Zhao, P AU - Tinnacher, R M AU - Zavarin, M AU - Kersting, A B Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 163 EP - 172 PB - Elsevier, Oxford VL - 137 SN - 0265-931X, 0265-931X KW - United States KW - solute transport KW - neptunium KW - isotopes KW - plutonium KW - Almendro test site KW - halogens KW - unsaturated zone KW - mass spectra KW - environmental analysis KW - drinking water KW - ground water KW - Nevada Test Site KW - radioactive isotopes KW - transport KW - carbon KW - spectra KW - rare earths KW - nuclear explosions KW - water pollution KW - Nevada KW - hydrology KW - chlorine KW - Cambric test site KW - technetium KW - Np-237 KW - explosions KW - pollutants KW - pollution KW - Dalhart test site KW - ICP mass spectra KW - water table KW - Chancellor test site KW - hydrostratigraphy KW - metals KW - mobilization KW - C-14 KW - Cheshire test site KW - water resources KW - actinides KW - yttrium KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680755746?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Analysis+of+trace+neptunium+in+the+vicinity+of+underground+nuclear+tests+at+the+Nevada+National+Security+Site&rft.au=Zhao%2C+P%3BTinnacher%2C+R+M%3BZavarin%2C+M%3BKersting%2C+A+B&rft.aulast=Zhao&rft.aufirst=P&rft.date=2014-11-01&rft.volume=137&rft.issue=&rft.spage=163&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2014.07.011 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 - 52 N1 - Document feature - illus. incl. 1 table, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-08-13 N1 - SubjectsTermNotLitGenreText - actinides; Almendro test site; C-14; Cambric test site; carbon; Chancellor test site; Cheshire test site; chlorine; Dalhart test site; drinking water; environmental analysis; explosions; ground water; halogens; hydrology; hydrostratigraphy; ICP mass spectra; isotopes; mass spectra; metals; mobilization; neptunium; Nevada; Nevada Test Site; Np-237; nuclear explosions; plutonium; pollutants; pollution; radioactive isotopes; rare earths; solute transport; spectra; technetium; transport; United States; unsaturated zone; water pollution; water resources; water table; yttrium DO - http://dx.doi.org/10.1016/j.jenvrad.2014.07.011 ER - TY - JOUR T1 - A Bayesian modeling approach for estimation of a shape-free ground water age distribution using multiple tracers AN - 1673367821; 2015-035765 AB - Due to the mixing of groundwaters with different ages in aquifers, groundwater age is more appropriately represented by a distribution rather than a scalar number. To infer a groundwater age distribution from environmental tracers, a mathematical form is often assumed for the shape of the distribution and the parameters of the mathematical distribution are estimated using deterministic or stochastic inverse methods. The prescription of the mathematical form limits the exploration of the age distribution to the shapes that can be described by the selected distribution. In this paper, the use of freeform histograms as groundwater age distributions is evaluated. A Bayesian Markov Chain Monte Carlo approach is used to estimate the fraction of groundwater in each histogram bin. The method was able to capture the shape of a hypothetical gamma distribution from the concentrations of four age tracers. The number of bins that can be considered in this approach is limited based on the number of tracers available. The histogram method was also tested on tracer data sets from Holten (The Netherlands; (super 3) H, (super 3) He, (super 85) Kr, (super 39) Ar) and the La Selva Biological Station (Costa-Rica; SF (sub 6) , CFCs, (super 3) H, (super 4) He and (super 14) C), and compared to a number of mathematical forms. According to standard Bayesian measures of model goodness, the best mathematical distribution performs better than the histogram distributions in terms of the ability to capture the observed tracer data relative to their complexity. Among the histogram distributions, the four bin histogram performs better in most of the cases. The Monte Carlo simulations showed strong correlations in the posterior estimates of bin contributions, indicating that these bins cannot be well constrained using the available age tracers. The fact that mathematical forms overall perform better than the freeform histogram does not undermine the benefit of the freeform approach, especially for the cases where a larger amount of observed data is available and when the real groundwater distribution is more complex than can be represented by simple mathematical forms. Abstract Copyright (2014) Elsevier, B.V. JF - Applied Geochemistry AU - Massoudieh, Arash AU - Visser, Ate AU - Sharifi, Soroosh AU - Broers, Hans Peter Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 252 EP - 264 PB - Elsevier, Oxford-New York-Beijing VL - 50 SN - 0883-2927, 0883-2927 KW - isotopes KW - Bayesian analysis KW - Costa Rica KW - tritium KW - La Selva Biological Station KW - simulation KW - ground water KW - Ar-39 KW - Kr-85 KW - radioactive isotopes KW - dates KW - noble gases KW - age KW - tracers KW - helium KW - statistical analysis KW - correlation KW - krypton KW - hydrochemistry KW - argon KW - aquifers KW - models KW - hydrogen KW - mathematical methods KW - Central America KW - Markov chain analysis KW - 03:Geochronology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673367821?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+Bayesian+modeling+approach+for+estimation+of+a+shape-free+ground+water+age+distribution+using+multiple+tracers&rft.au=Massoudieh%2C+Arash%3BVisser%2C+Ate%3BSharifi%2C+Soroosh%3BBroers%2C+Hans+Peter&rft.aulast=Massoudieh&rft.aufirst=Arash&rft.date=2014-11-01&rft.volume=50&rft.issue=&rft.spage=252&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2013.10.004 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 - 2015-01-01 N1 - Number of references - 93 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2016-02-18 N1 - SubjectsTermNotLitGenreText - age; aquifers; Ar-39; argon; Bayesian analysis; Central America; correlation; Costa Rica; dates; ground water; helium; hydrochemistry; hydrogen; isotopes; Kr-85; krypton; La Selva Biological Station; Markov chain analysis; mathematical methods; models; noble gases; radioactive isotopes; simulation; statistical analysis; tracers; tritium DO - http://dx.doi.org/10.1016/j.apgeochem.2013.10.004 ER - TY - JOUR T1 - Intercomparison of tritium and noble gases analyses, (super 3) H/ (super 3) He ages and derived parameters excess air and recharge temperature AN - 1673367107; 2015-035755 AB - Groundwater age dating with the tritium-helium ( (super 3) H/ (super 3) He) method has become a powerful tool for hydrogeologists. The uncertainty of the apparent (super 3) H/ (super 3) He age depends on the analytical precision of the (super 3) H measurement and the uncertainty of the tritiogenic (super 3) He component. The goal of this study, as part of the groundwater age-dating interlaboratory comparison exercise, was to quantify the analytical uncertainty of the (super 3) H and noble gas measurements and to assess whether they meet the requirements for (super 3) H/ (super 3) He dating and noble gas paleotemperature reconstruction. Samples for the groundwater dating intercomparison exercise were collected on 1 February, 2012, from three previously studied wells in the Paris Basin (France). Fourteen laboratories participated in the intercomparison for tritium analyses and ten laboratories participated in the noble gas intercomparison. Not all laboratories analyzed samples from every borehole. The reproducibility of the tritium measurements was 13.5%. The reproducibility of the (super 3) He/ (super 4) He ratio and (super 4) He, Ne, Ar, Kr and Xe concentrations was 1.4%, 1.8%, 1.5%, 2.2%, 2.9%, and 2.4% respectively. The uncertainty of the tritium and noble gas measurements results in a typical (super 3) H/ (super 3) He age precision of better than 2.5 years in this case. However, the measurement uncertainties for the noble gas concentrations are insufficient to distinguish the appropriate excess air model if the measured helium concentration is not included. While the analytical uncertainty introduces an unavoidable source of uncertainty in the (super 3) H/ (super 3) He apparent age estimate, other sources of uncertainty are often much greater and less well defined than the analytical uncertainty. Abstract Copyright (2014) Elsevier, B.V. JF - Applied Geochemistry AU - Visser, Ate AU - Fourre, Elise AU - Barbecot, Florent AU - Aquilina, Luc AU - Labasque, Thierry AU - Vergnaud, Virginie AU - Esser, Bradley K Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 130 EP - 141 PB - Elsevier, Oxford-New York-Beijing VL - 50 SN - 0883-2927, 0883-2927 KW - relative age KW - reproducibility KW - Albian KW - isotopes KW - Cretaceous KW - data processing KW - Europe KW - Yonne France KW - tritium KW - He-3 KW - stable isotopes KW - temperature KW - reservoir rocks KW - ground water KW - France KW - Cenozoic KW - sedimentary rocks KW - radioactive isotopes KW - geochronology KW - chemical reactions KW - dates KW - Paris Basin KW - noble gases KW - Auxerre France KW - helium KW - uncertainty KW - Fontainebleau Sandstone KW - Lower Cretaceous KW - Western Europe KW - isotope ratios KW - statistical analysis KW - Paleogene KW - Mesozoic KW - measurement KW - models KW - Tertiary KW - recharge KW - hydrogen KW - residence time KW - mathematical methods KW - He-3/H-3 KW - Gien-Auxerre France KW - Oligocene KW - 02B:Hydrochemistry KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673367107?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Intercomparison+of+tritium+and+noble+gases+analyses%2C+%28super+3%29+H%2F+%28super+3%29+He+ages+and+derived+parameters+excess+air+and+recharge+temperature&rft.au=Visser%2C+Ate%3BFourre%2C+Elise%3BBarbecot%2C+Florent%3BAquilina%2C+Luc%3BLabasque%2C+Thierry%3BVergnaud%2C+Virginie%3BEsser%2C+Bradley+K&rft.aulast=Visser&rft.aufirst=Ate&rft.date=2014-11-01&rft.volume=50&rft.issue=&rft.spage=130&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2014.03.005 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 - 2015-01-01 N1 - Number of references - 44 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2016-02-18 N1 - SubjectsTermNotLitGenreText - Albian; Auxerre France; Cenozoic; chemical reactions; Cretaceous; data processing; dates; Europe; Fontainebleau Sandstone; France; geochronology; Gien-Auxerre France; ground water; He-3/H-3; He-3; helium; hydrogen; isotope ratios; isotopes; Lower Cretaceous; mathematical methods; measurement; Mesozoic; models; noble gases; Oligocene; Paleogene; Paris Basin; radioactive isotopes; recharge; relative age; reproducibility; reservoir rocks; residence time; sedimentary rocks; stable isotopes; statistical analysis; temperature; Tertiary; tritium; uncertainty; Western Europe; Yonne France DO - http://dx.doi.org/10.1016/j.apgeochem.2014.03.005 ER - TY - JOUR T1 - Quantifying underestimates of long-term upper-ocean warming AN - 1664206394; PQ0001188572 AB - The global ocean stores more than 90% of the heat associated with observed greenhouse-gas-attributed global warming. Using satellite altimetry observations and a large suite of climate models, we conclude that observed estimates of 0-700 dbar global ocean warming since 1970 are likely biased low. This underestimation is attributed to poor sampling of the Southern Hemisphere, and limitations of the analysis methods that conservatively estimate temperature changes in data-sparse regions. We find that the partitioning of northern and southern hemispheric simulated sea surface height changes are consistent with precise altimeter observations, whereas the hemispheric partitioning of simulated upper-ocean warming is inconsistent with observed in-situ-based ocean heat content estimates. Relying on the close correspondence between hemispheric-scale ocean heat content and steric changes, we adjust the poorly constrained Southern Hemisphere observed warming estimates so that hemispheric ratios are consistent with the broad range of modelled results. These adjustments yield large increases (2.2-7.1 10 super(22) J 35 yr super(-1)) to current global upper-ocean heat content change estimates, and have important implications for sea level, the planetary energy budget and climate sensitivity assessments. JF - Nature Climate Change AU - Durack, Paul J AU - Gleckler, Peter J AU - Landerer, Felix W AU - Taylor, Karl E AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Livermore, California 94550, USA Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 999 EP - 1005 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 4 IS - 11 SN - 1758-678X, 1758-678X KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts; Sustainability Science Abstracts KW - Satellite altimetry KW - Temperature changes KW - Sensitivity KW - Sea level KW - Climate models KW - Climate change KW - Temperature KW - Greenhouse effect KW - Energy budget KW - Ocean currents KW - Currents KW - Ocean warming KW - Oceans KW - Climate sensitivity KW - Altimeters KW - Global warming KW - Greenhouse gases KW - Oceanographic data KW - ENA 03:Energy KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664206394?accountid=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=Quantifying+underestimates+of+long-term+upper-ocean+warming&rft.au=Durack%2C+Paul+J%3BGleckler%2C+Peter+J%3BLanderer%2C+Felix+W%3BTaylor%2C+Karl+E&rft.aulast=Durack&rft.aufirst=Paul&rft.date=2014-11-01&rft.volume=4&rft.issue=11&rft.spage=999&rft.isbn=&rft.btitle=&rft.title=Nature+Climate+Change&rft.issn=1758678X&rft_id=info:doi/10.1038%2Fnclimate2389 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Ocean currents; Temperature changes; Ocean warming; Climate models; Climate sensitivity; Climate change; Global warming; Energy budget; Oceanographic data; Satellite altimetry; Sensitivity; Currents; Sea level; Oceans; Temperature; Altimeters; Greenhouse effect; Greenhouse gases DO - http://dx.doi.org/10.1038/nclimate2389 ER - TY - JOUR T1 - Use of Microdosing and Accelerator Mass Spectrometry To Evaluate the Pharmacokinetic Linearity of a Novel Tricyclic GyrB/ParE Inhibitor in Rats AN - 1635017243; 20999440 AB - Determining the pharmacokinetics (PKs) of drug candidates is essential for understanding their biological fate. The ability to obtain human PK information early in the drug development process can help determine if future development is warranted. Microdosing was developed to assess human PKs, at ultra-low doses, early in the drug development process. Microdosing has also been used in animals to confirm PK linearity across subpharmacological and pharmacological dose ranges. The current study assessed the PKs of a novel antimicrobial preclinical drug candidate (GP-4) in rats as a step toward human microdosing studies. Dose proportionality was determined at 3 proposed therapeutic doses (3, 10, and 30 mg/kg of body weight), and PK linearity between a microdose and a pharmacological dose was assessed in Sprague-Dawley rats. Plasma PKs over the 3 pharmacological doses were proportional. Over the 10-fold dose range, the maximum concentration in plasma and area under the curve (AUC) increased 9.5- and 15.8-fold, respectively. PKs from rats dosed with a 14C-labeled microdose versus a 14C-labeled pharmacological dose displayed dose linearity. In the animals receiving a microdose and the therapeutically dosed animals, the AUCs from time zero to infinity were 2.6 ng . h/ml and 1,336 ng . h/ml, respectively, and the terminal half-lives were 5.6 h and 1.4 h, respectively. When the AUC values were normalized to a dose of 1.0 mg/kg, the AUC values were 277.5 ng . h/ml for the microdose and 418.2 ng . h/ml for the pharmacological dose. This 1.5-fold difference in AUC following a 300-fold difference in dose is considered linear across the dose range. On the basis of the results, the PKs from the microdosed animals were considered to be predictive of the PKs from the therapeutically dosed animals. JF - Antimicrobial Agents & Chemotherapy AU - Malfatti, Michael A AU - Lao, Victoria AU - Ramos, Courtney L AU - Ong, Voon S AU - Turteltaub, Kenneth W AD - Biosciences and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA, malfatti1@llnl.gov. Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 6477 EP - 6483 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 United States VL - 58 IS - 11 SN - 0066-4804, 0066-4804 KW - Microbiology Abstracts A: Industrial & Applied Microbiology KW - Body weight KW - DNA topoisomerase KW - Drug development KW - Pharmacokinetics KW - Mass spectroscopy KW - DNA topoisomerase IV KW - Antimicrobial agents KW - A 01340:Antibiotics & Antimicrobials UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1635017243?accountid=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=Antimicrobial+Agents+%26+Chemotherapy&rft.atitle=Use+of+Microdosing+and+Accelerator+Mass+Spectrometry+To+Evaluate+the+Pharmacokinetic+Linearity+of+a+Novel+Tricyclic+GyrB%2FParE+Inhibitor+in+Rats&rft.au=Malfatti%2C+Michael+A%3BLao%2C+Victoria%3BRamos%2C+Courtney+L%3BOng%2C+Voon+S%3BTurteltaub%2C+Kenneth+W&rft.aulast=Malfatti&rft.aufirst=Michael&rft.date=2014-11-01&rft.volume=58&rft.issue=11&rft.spage=6477&rft.isbn=&rft.btitle=&rft.title=Antimicrobial+Agents+%26+Chemotherapy&rft.issn=00664804&rft_id=info:doi/10.1128%2FAAC.03300-14 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Number of references - 26 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Body weight; DNA topoisomerase; Drug development; DNA topoisomerase IV; Mass spectroscopy; Pharmacokinetics; Antimicrobial agents DO - http://dx.doi.org/10.1128/AAC.03300-14 ER - TY - JOUR T1 - Samarium-neodymium chronology and rubidium-strontium systematics of an Allende calcium-aluminum-rich inclusion with implications for (super 146) Sm half-life AN - 1623263528; 2014-089569 AB - Calcium-aluminum-rich inclusions (CAIs) are primitive objects that formed within the protoplanetary disk surrounding the young Sun. Recent Pb-Pb chronologic studies have demonstrated that CAIs are the oldest solar system solids, crystallizing 4567 Ma ago (Amelin et al., 2002; Connelly et al., 2012). The isotope systematics of CAIs therefore provide critical insight into the earliest history of the Solar System. Although Sm-Nd and Rb-Sr geochronometers are highly effective tools for investigating cosmochemical evolution in the early Solar System, previous studies of CAIs have revealed evidence for isotopically disturbed systems. Here we report new age data for Allende CAI Al3S4 derived from both the long-lived ( (super 147) Sm- (super 143) Nd) and short-lived ( (super 146) Sm- (super 142) Nd) isotopic systems. The (super 147) Sm- (super 143) Nd chronometer yields an age of 4560 + or - 34 Ma that is concordant with (super 207) Pb- (super 206) Pb ages for CAIs and indicates that the Sm-Nd system was not significantly disturbed by secondary alteration or nucleosynthetic processes. The slope of the (super 146) Sm- (super 142) Nd isochron defines the Solar System initial (super 146) Sm/ (super 144) Sm of 0.00828+ or - 0.000444. This value is significantly different from the value of 0.0094 determined by Kinoshita et al. (2012). Ages recalculated from all published (super 146) Sm- (super 142) Nd isochron data using the traditional 103 Ma half-life and the initial (super 146) Sm/ (super 144) Sm value determined here closely match Pb-Pb and (super 147) Sm- (super 143) Nd ages determined on the same samples. In contrast, ages recalculated using the 68 Ma half-life determined by Kinoshita et al. (2012) and either of the initial (super 146) Sm/ (super 144) Sm values are often anomalously old. This is particularly true for the youngest samples with (super 146) Sm- (super 142) Nd isochron ages that are most sensitive to the choice of (super 146) Sm half-life used in the age calculation. In contrast to the Sm-Nd isotope system, the Rb-Sr system is affected by alteration but yields an apparent isochron with a slope corresponding to a much younger age of 4247 + or - 110 Ma. Although the Rb-Sr system in CAIs appears to be disturbed, the initial (super 87) Sr/ (super 86) Sr value determined from the isochron is 0.698942 + or - 0.000008, and closely approximates estimates of the initial Solar System value. Although this isochron may be a mixing line, it might also record alteration on the Allende parent body in which Rb was added to the Al3S4 CAI that was initially largely devoid of Rb. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Marks, N E AU - Borg, L E AU - Hutcheon, I D AU - Jacobsen, B AU - Clayton, R N Y1 - 2014/11/01/ PY - 2014 DA - 2014 Nov 01 SP - 15 EP - 24 PB - Elsevier, Amsterdam VL - 405 SN - 0012-821X, 0012-821X KW - stony meteorites KW - isotopes KW - calcium-aluminum inclusions KW - thermal ionization mass spectra KW - mass spectra KW - CV chondrites KW - stable isotopes KW - Rb/Sr KW - Allende Meteorite KW - meteorites KW - radioactive isotopes KW - chronology KW - dates KW - inclusions KW - absolute age KW - spectra KW - samarium KW - rare earths KW - chondrites KW - alkaline earth metals KW - Sm-146/Sm-144 KW - isotope ratios KW - rubidium KW - alkali metals KW - cosmochemistry KW - nucleosynthesis KW - carbonaceous chondrites KW - isochrons KW - early solar system KW - Nd-144/Nd-143 KW - Sr-87/Sr-86 KW - Sm/Nd KW - metals KW - neodymium KW - strontium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623263528?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Samarium-neodymium+chronology+and+rubidium-strontium+systematics+of+an+Allende+calcium-aluminum-rich+inclusion+with+implications+for+%28super+146%29+Sm+half-life&rft.au=Marks%2C+N+E%3BBorg%2C+L+E%3BHutcheon%2C+I+D%3BJacobsen%2C+B%3BClayton%2C+R+N&rft.aulast=Marks&rft.aufirst=N&rft.date=2014-11-01&rft.volume=405&rft.issue=&rft.spage=15&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.08.017 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 - Last updated - 2014-11-13 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - absolute age; alkali metals; alkaline earth metals; Allende Meteorite; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; chronology; cosmochemistry; CV chondrites; dates; early solar system; inclusions; isochrons; isotope ratios; isotopes; mass spectra; metals; meteorites; Nd-144/Nd-143; neodymium; nucleosynthesis; radioactive isotopes; rare earths; Rb/Sr; rubidium; samarium; Sm-146/Sm-144; Sm/Nd; spectra; Sr-87/Sr-86; stable isotopes; stony meteorites; strontium; thermal ionization mass spectra DO - http://dx.doi.org/10.1016/j.epsl.2014.08.017 ER - TY - JOUR T1 - High-precision (super 10) Be chronology of moraines in the Southern Alps indicates synchronous cooling in Antarctica and New Zealand 42,000 years ago AN - 1623256827; 2014-089584 AB - Millennial-scale temperature variations in Antarctica during the period 80,000 to 18,000 years ago are known to anti-correlate broadly with winter-centric cold-warm episodes revealed in Greenland ice cores. However, the extent to which climate fluctuations in the Southern Hemisphere beat in time with Antarctica, rather than with the Northern Hemisphere, has proved a controversial question. In this study we determine the ages of a prominent sequence of glacial moraines in New Zealand and use the results to assess the phasing of millennial climate change. Forty-four (super 10) Be cosmogenic surface-exposure ages of boulders deposited by the Pukaki glacier in the Southern Alps document four moraine-building events from Marine Isotope Stage 3 (MIS 3) through to the end of the Last Glacial Maximum ( approximately 18,000 years ago; LGM). The earliest moraine-building event is defined by the ages of nine boulders on a belt of moraine that documents the culmination of a glacier advance 42,000 years ago. At the Pukaki locality this advance was of comparable scale to subsequent advances that, from the remaining exposure ages, occurred between 28,000 and 25,000, at 21,000, and at 18,000 years ago. Collectively, all four moraine-building events represent the LGM. The glacier advance 42,000 years ago in the Southern Alps coincides in Antarctica with a cold episode, shown by the isotopic record from the EPICA Dome C ice core, between the prominent A1 and A2 warming events. Therefore, the implication of the Pukaki glacier record is that as early as 42,000 years ago an episode of glacial cold similar to that of the LGM extended in the atmosphere from high on the East Antarctic plateau to at least as far north as the Southern Alps ( approximately 44 degrees S). Such a cold episode is thought to reflect the translation through the atmosphere and/or the ocean of the anti-phased effects of Northern Hemisphere interstadial conditions to the southern half of the Southern Hemisphere. Regardless of the mechanism, any explanation for the cold episode at 42,000 years ago must account for its widespread atmospheric footprint not only in Antarctica but also within the westerly wind belt in southern mid-latitudes. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Kelley, Samuel E AU - Kaplan, Michael R AU - Schaefer, Joerg M AU - Andersen, Bjorn G AU - Barrell, David J A AU - Putnam, Aaron E AU - Denton, George H AU - Schwartz, Roseanne AU - Finkel, Robert C AU - Doughty, Alice M Y1 - 2014/11/01/ PY - 2014 DA - 2014 Nov 01 SP - 194 EP - 206 PB - Elsevier, Amsterdam VL - 405 SN - 0012-821X, 0012-821X KW - Southern Ocean KW - last glacial maximum KW - isotopes KW - Lake Pukaki KW - Southern Alps KW - paleoclimatology KW - exposure age KW - Cenozoic KW - South Island KW - radioactive isotopes KW - chronology KW - age KW - moraines KW - cooling KW - MIS 3 KW - alkaline earth metals KW - ice cores KW - Quaternary KW - Be-10 KW - Australasia KW - glaciers KW - Southern Hemisphere KW - metals KW - Pleistocene KW - sea-surface temperature KW - Pukaki Glacier KW - New Zealand KW - beryllium KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256827?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=High-precision+%28super+10%29+Be+chronology+of+moraines+in+the+Southern+Alps+indicates+synchronous+cooling+in+Antarctica+and+New+Zealand+42%2C000+years+ago&rft.au=Kelley%2C+Samuel+E%3BKaplan%2C+Michael+R%3BSchaefer%2C+Joerg+M%3BAndersen%2C+Bjorn+G%3BBarrell%2C+David+J+A%3BPutnam%2C+Aaron+E%3BDenton%2C+George+H%3BSchwartz%2C+Roseanne%3BFinkel%2C+Robert+C%3BDoughty%2C+Alice+M&rft.aulast=Kelley&rft.aufirst=Samuel&rft.date=2014-11-01&rft.volume=405&rft.issue=&rft.spage=194&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.07.031 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 - 68 N1 - Document feature - illus. incl. 1 table, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-11-13 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - age; alkaline earth metals; Australasia; Be-10; beryllium; Cenozoic; chronology; cooling; exposure age; glaciers; ice cores; isotopes; Lake Pukaki; last glacial maximum; metals; MIS 3; moraines; New Zealand; paleoclimatology; Pleistocene; Pukaki Glacier; Quaternary; radioactive isotopes; sea-surface temperature; South Island; Southern Alps; Southern Hemisphere; Southern Ocean DO - http://dx.doi.org/10.1016/j.epsl.2014.07.031 ER - TY - CPAPER T1 - Silica Gels for Enhancing Oil and Gas Carbonate Reservoirs Performance and CO2 Storage T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645176512; 6317213 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Ezzedine, Souheil AU - Bourcier, William AU - Roberts, Sarah AU - Roberts, Jeff Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Gels KW - Storage KW - Oil and gas industry KW - silica gel KW - Carbon dioxide KW - carbonates KW - Reservoirs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645176512?accountid=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=Silica+Gels+for+Enhancing+Oil+and+Gas+Carbonate+Reservoirs+Performance+and+CO2+Storage&rft.au=Ezzedine%2C+Souheil%3BBourcier%2C+William%3BRoberts%2C+Sarah%3BRoberts%2C+Jeff&rft.aulast=Ezzedine&rft.aufirst=Souheil&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 - CPAPER T1 - Uncertainty Quantification of Calcite Reactive Transport in Fractured Porous Reservoir T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645168419; 6316779 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Ezzedine, Souheil Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Reservoir KW - Fractures KW - Reservoirs KW - calcite UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645168419?accountid=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=Uncertainty+Quantification+of+Calcite+Reactive+Transport+in+Fractured+Porous+Reservoir&rft.au=Ezzedine%2C+Souheil&rft.aulast=Ezzedine&rft.aufirst=Souheil&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 - CPAPER T1 - Prospects for a Million-Year History of the Mono Lake Basin from a Long Drill Core T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645166017; 6316785 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Zimmerman, Susan AU - Hemming, Sidney AU - Deino, Alan AU - Jayko, Angela AU - Colman, Steven AU - Starratt, Scott Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Historical account KW - Lake basins KW - Drills KW - Basins KW - USA, California, Mono L. UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645166017?accountid=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=Prospects+for+a+Million-Year+History+of+the+Mono+Lake+Basin+from+a+Long+Drill+Core&rft.au=Zimmerman%2C+Susan%3BHemming%2C+Sidney%3BDeino%2C+Alan%3BJayko%2C+Angela%3BColman%2C+Steven%3BStarratt%2C+Scott&rft.aulast=Zimmerman&rft.aufirst=Susan&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 - CPAPER T1 - Application of High Performance Computing to Subsurface Explosion Source Physics T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645166004; 6316509 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Antoun, Tarabay AU - Vorobiev, Oleg AU - Ezzedine, Souheil AU - Glenn, Lew Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Explosions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645166004?accountid=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=Application+of+High+Performance+Computing+to+Subsurface+Explosion+Source+Physics&rft.au=Antoun%2C+Tarabay%3BVorobiev%2C+Oleg%3BEzzedine%2C+Souheil%3BGlenn%2C+Lew&rft.aulast=Antoun&rft.aufirst=Tarabay&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 - CPAPER T1 - Numerical Simulations of Underground Explosions: Effect of Joints near the Source on Energy Coupling and Shear Motions Generation T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645165988; 6316511 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Ezzedine, Souheil AU - Vorobiev, Oleg AU - Antoun, Tarabay AU - Glenn, Lew Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Mathematical models KW - Energy coupling KW - Energy KW - Simulation KW - Explosions KW - Joints UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645165988?accountid=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=Numerical+Simulations+of+Underground+Explosions%3A+Effect+of+Joints+near+the+Source+on+Energy+Coupling+and+Shear+Motions+Generation&rft.au=Ezzedine%2C+Souheil%3BVorobiev%2C+Oleg%3BAntoun%2C+Tarabay%3BGlenn%2C+Lew&rft.aulast=Ezzedine&rft.aufirst=Souheil&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 - CPAPER T1 - Large Scale Modeling of Underground Explosions in Fractured Granite Based on Geological, Geomechanical and Geophysical Characterization T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645165952; 6316510 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Vorobiev, Oleg AU - Ezzedine, Souheil AU - Glenn, Lew AU - Antoun, Tarabay Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Fractures KW - Geology KW - Geophysics KW - Granite KW - Explosions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645165952?accountid=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=Large+Scale+Modeling+of+Underground+Explosions+in+Fractured+Granite+Based+on+Geological%2C+Geomechanical+and+Geophysical+Characterization&rft.au=Vorobiev%2C+Oleg%3BEzzedine%2C+Souheil%3BGlenn%2C+Lew%3BAntoun%2C+Tarabay&rft.aulast=Vorobiev&rft.aufirst=Oleg&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 - CPAPER T1 - Parametric Studies of near-Surface Explosions T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645165800; 6316514 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Rodgers, Artie AU - Ezzedine, Souheil AU - Ford, Sean AU - Vorobiev, Oleg AU - Pitarka, Arben Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Explosions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645165800?accountid=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=Parametric+Studies+of+near-Surface+Explosions&rft.au=Rodgers%2C+Artie%3BEzzedine%2C+Souheil%3BFord%2C+Sean%3BVorobiev%2C+Oleg%3BPitarka%2C+Arben&rft.aulast=Rodgers&rft.aufirst=Artie&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 - CPAPER T1 - Modeling Full Seismic Waveforms in a Complex Environment T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645165689; 6316513 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Mellors, Robert AU - Pitarka, Arben AU - Matzel, Eric AU - Walter, William AU - Ford, Sean AU - Hauk, Teresa AU - Ganzberger, Michael Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Geology KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645165689?accountid=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=Modeling+Full+Seismic+Waveforms+in+a+Complex+Environment&rft.au=Mellors%2C+Robert%3BPitarka%2C+Arben%3BMatzel%2C+Eric%3BWalter%2C+William%3BFord%2C+Sean%3BHauk%2C+Teresa%3BGanzberger%2C+Michael&rft.aulast=Mellors&rft.aufirst=Robert&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 - Tropical Pacific forcing of late-Holocene hydrologic variability in the coastal southwest United States AN - 1656036986; 2015-013350 AB - Change in water availability is of great concern in the coastal southwest United States ( (sub CSW) US). Reconstructing the history of water pre-1800 AD requires the use of proxy data. Lakes provide long-lived, high-resolution terrestrial archives of past hydrologic change, and their sediments contain a variety of proxies. This study presents geochemical and sedimentological data from Zaca Lake, CA (Santa Barbara County) used to reconstruct a 3000 year history of winter season moisture source (delta D (sub wax) ) and catchment run-off (125-2000 mu m sand) at decadal resolution. Here we show that winter season moisture source and run-off are highly variable over the past 3000 years; superimposed are regime shifts between wetter or drier conditions that persist on average over multiple centuries. Moisture source and run-off do not consistently covary indicating multiple atmospheric circulation modes where wetter/drier conditions prevail. Grain-size analysis reveals two intervals of multi-century drought with less run-off that pre-date the "epic droughts" as identified by Cook et al. (2004). A well-defined wet period with more run-off is identified during the Little Ice Age. Notably, the grain size data show strong coherence with western North American percent drought area indices for the past 1000 years. As a result, our data extend the history of drought and pluvials back to 3000 calendar years BP in the (sub CSW) US. Comparison to tropical Pacific proxies confirms the long-term relationship between El Nino and enhanced run-off in the (sub CSW) US. Our results demonstrate the long-term importance of the tropical Pacific to the (sub CSW) US winter season hydroclimate. Abstract Copyright (2014) Elsevier, B.V. JF - Quaternary Science Reviews AU - Kirby, Matthew E AU - Feakins, Sarah J AU - Hiner, Christine A AU - Fantozzi, Joanna AU - Zimmerman, Susan R H AU - Dingemans, Theodore AU - Mensing, Scott A Y1 - 2014/10/15/ PY - 2014 DA - 2014 Oct 15 SP - 27 EP - 38 PB - Elsevier VL - 102 SN - 0277-3791, 0277-3791 KW - United States KW - lithostratigraphy KW - isotopes KW - leaves KW - paleoclimatology KW - Holocene KW - Cenozoic KW - California KW - radioactive isotopes KW - dates KW - carbon KW - waxes KW - sediments KW - absolute age KW - climate forcing KW - Quaternary KW - chronostratigraphy KW - paleohydrology KW - Zaca Lake KW - Southwestern U.S. KW - biomarkers KW - Santa Barbara County California KW - organic compounds KW - Southern California KW - lacustrine environment KW - reconstruction KW - C-14 KW - upper Holocene KW - lake sediments KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036986?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Tropical+Pacific+forcing+of+late-Holocene+hydrologic+variability+in+the+coastal+southwest+United+States&rft.au=Kirby%2C+Matthew+E%3BFeakins%2C+Sarah+J%3BHiner%2C+Christine+A%3BFantozzi%2C+Joanna%3BZimmerman%2C+Susan+R+H%3BDingemans%2C+Theodore%3BMensing%2C+Scott+A&rft.aulast=Kirby&rft.aufirst=Matthew&rft.date=2014-10-15&rft.volume=102&rft.issue=&rft.spage=27&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2Fj.quascirev.2014.08.005 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 - 87 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - absolute age; biomarkers; C-14; California; carbon; Cenozoic; chronostratigraphy; climate forcing; dates; Holocene; isotopes; lacustrine environment; lake sediments; leaves; lithostratigraphy; organic compounds; paleoclimatology; paleohydrology; Quaternary; radioactive isotopes; reconstruction; Santa Barbara County California; sediments; Southern California; Southwestern U.S.; United States; upper Holocene; waxes; Zaca Lake DO - http://dx.doi.org/10.1016/j.quascirev.2014.08.005 ER - TY - JOUR T1 - Decline of the lunar core dynamo AN - 1629945008; 2014-094271 AB - Recent analyses of Apollo samples have demonstrated that a core dynamo existed on the Moon between at least 4.25 and 3.56 billion years ago (Ga) with surface field intensities reaching approximately 70 mu T. However, it is unknown when the Moon's magnetic field declined. Determining the temporal evolution of the dynamo is important because it constrains secular changes in power at the lunar core-mantle boundary and, by implication, the Moon's thermal and orbital evolution and the field generation mechanism. Here we present paleomagnetic data from several younger mare basalts which demonstrate that the surface magnetic field had declined precipitously to < approximately 4 mu T by 3.19 Ga. It is currently unclear whether such a rapid decrease in field strength reflects either the cessation of the dynamo during this period or its persistence beyond 3.19 Ga in a drastically weakened state. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Tikoo, Sonia M AU - Weiss, Benjamin P AU - Cassata, William S AU - Shuster, David L AU - Gattacceca, Jerome AU - Lima, Eduardo A AU - Suavet, Clement AU - Nimmo, Francis AU - Fuller, Michael D Y1 - 2014/10/15/ PY - 2014 DA - 2014 Oct 15 SP - 89 EP - 97 PB - Elsevier, Amsterdam VL - 404 SN - 0012-821X, 0012-821X KW - demagnetization KW - volcanic rocks KW - orbits KW - igneous rocks KW - magnetization KW - Apollo Program KW - thermal history KW - core-mantle boundary KW - magnetic field KW - coercivity KW - remanent magnetization KW - basalts KW - thermochronology KW - lunar core KW - Moon KW - dynamos KW - paleomagnetism KW - natural remanent magnetization KW - lunar samples KW - magnetic declination KW - lunar mantle KW - core KW - Apollo 12 KW - Apollo 15 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629945008?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Decline+of+the+lunar+core+dynamo&rft.au=Tikoo%2C+Sonia+M%3BWeiss%2C+Benjamin+P%3BCassata%2C+William+S%3BShuster%2C+David+L%3BGattacceca%2C+Jerome%3BLima%2C+Eduardo+A%3BSuavet%2C+Clement%3BNimmo%2C+Francis%3BFuller%2C+Michael+D&rft.aulast=Tikoo&rft.aufirst=Sonia&rft.date=2014-10-15&rft.volume=404&rft.issue=&rft.spage=89&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.07.010 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 - 58 N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-12-04 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - Apollo 12; Apollo 15; Apollo Program; basalts; coercivity; core; core-mantle boundary; demagnetization; dynamos; igneous rocks; lunar core; lunar mantle; lunar samples; magnetic declination; magnetic field; magnetization; Moon; natural remanent magnetization; orbits; paleomagnetism; remanent magnetization; thermal history; thermochronology; volcanic rocks DO - http://dx.doi.org/10.1016/j.epsl.2014.07.010 ER - TY - JOUR T1 - The influence of temperature, pH, and growth rate on the delta (super 18) O composition of inorganically precipitated calcite AN - 1629944306; 2014-094293 AB - The oxygen isotope composition of carbonate minerals varies with temperature as well as other environmental variables. For carbonates that precipitate slowly, under conditions that approach thermodynamic equilibrium, the temperature-dependence of (super 18) O uptake is the dominant signal and the measured (super 18) O content can be used as a paleotemperature proxy. In the more common case where carbonate minerals grow in a regime where they are not in isotopic equilibrium with their host solution, their oxygen isotope compositions are a convolution of multiple environmental variables. Here we present results from calcite growth experiments demonstrating the occurrence of large (>2ppm) non-equilibrium oxygen isotope effects under conditions relevant to biogenic calcite growth and many natural inorganic systems. We show that these non-equilibrium effects vary systematically with pH and crystal growth rate. An isotopic ion-by-ion crystal growth model quantifies the competing roles of temperature, pH, and growth rate, and provides a general description of calcite-water oxygen isotope fractionation under non-equilibrium conditions. The crystal growth model results show that (1) there are both equilibrium and kinetic contributions to calcite oxygen isotopes at biogenic growth rates, (2) calcite does not directly inherit the oxygen isotope composition of DIC even at fast growth rates, (3) there is a kinetically controlled variation of about 1 ppm per pH unit between pH=7.7 and 9.3 at constant growth rate for inorganic calcite as well as biogenic calcite, and (4) extreme light isotope enrichments in calcite in alkaline environments are likely due to disequilibrium among DIC species in aqueous solution. The model can be extended to (super 13) C uptake into carbonates as well as clumped isotopes but additional data are needed to constrain the kinetic fractionation factors for carbon isotopes. The experimental and model results constitute an important step in separating the relative influence of inorganic and biologic processes on isotopic fractionation and may aid the development of new paleoproxies based on non-equilibrium effects. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Watkins, James M AU - Hunt, Jonathan D AU - Ryerson, Frederick J AU - DePaolo, Donald J Y1 - 2014/10/15/ PY - 2014 DA - 2014 Oct 15 SP - 332 EP - 343 PB - Elsevier, Amsterdam VL - 404 SN - 0012-821X, 0012-821X KW - isotope fractionation KW - anions KW - growth rates KW - experimental studies KW - carbonate ion KW - oxygen KW - isotopes KW - isotope ratios KW - crystal growth KW - O-18/O-16 KW - bicarbonate ion KW - stable isotopes KW - temperature KW - inorganic materials KW - calcite KW - models KW - biogenic processes KW - precipitation KW - paleotemperature KW - cations KW - kinetics KW - carbonates KW - pH KW - 02D:Isotope geochemistry KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629944306?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=The+influence+of+temperature%2C+pH%2C+and+growth+rate+on+the+delta+%28super+18%29+O+composition+of+inorganically+precipitated+calcite&rft.au=Watkins%2C+James+M%3BHunt%2C+Jonathan+D%3BRyerson%2C+Frederick+J%3BDePaolo%2C+Donald+J&rft.aulast=Watkins&rft.aufirst=James&rft.date=2014-10-15&rft.volume=404&rft.issue=&rft.spage=332&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.07.036 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 - 53 N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-12-04 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - anions; bicarbonate ion; biogenic processes; calcite; carbonate ion; carbonates; cations; crystal growth; experimental studies; growth rates; inorganic materials; isotope fractionation; isotope ratios; isotopes; kinetics; models; O-18/O-16; oxygen; paleotemperature; pH; precipitation; stable isotopes; temperature DO - http://dx.doi.org/10.1016/j.epsl.2014.07.036 ER - TY - JOUR T1 - Discrete element method analysis of non-coaxial flow under rotational shear AN - 1629939314; 2014-099273 AB - This study focuses on non-coaxial flow behavior of cohesionless soil undergoing cyclic rotational shear, with a special interest in the effects of particle-scale characteristics. To this end, we perform a series of 2D discrete element simulations with various particle shapes, inter-particle coefficient of friction, initial density, and stress ratios. The validity and efficacy of the numerical model is established by systematically comparing numerical simulation results with existing laboratory testing results. Such comparison shows that the numerical simulations are capable of capturing mechanical behavior observed in laboratory testing under rotational shear. We further demonstrate and quantify a strong yet simple relationship between the deviatoric part of the normalized strain increment and the non-coaxial angle, denoted by (Delta epsilon ) (super R) (sub q) and psi , respectively. This quantitative correlation between psi and (Delta epsilon ) (super R) (sub q) is independent of applied stress ratio, initial and current void ratio, and the number of cycles applied, but dependent on the principal stress orientation and particle-scale characteristics. At the same (Delta epsilon ) (super R) (sub q) , specimens with higher inter-particle friction angle or smaller particle aspect ratio show greater non-coaxial angles. A simple model psi =45 degrees m (super (Delta epsilon )Rq) is able to fit this psi -(Delta epsilon ) (super R) (sub q) relationship well, which provides a useful relationship that can be exploited in developing constitutive models for rotational shearing. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - International Journal for Numerical and Analytical Methods in Geomechanics AU - Tong, Zhaoxia AU - Fu, Pengcheng AU - Dafalias, Yannis F AU - Yao, Yangping Y1 - 2014/10/10/ PY - 2014 DA - 2014 Oct 10 SP - 1519 EP - 1540 PB - Wiley, Chichester VL - 38 IS - 14 SN - 0363-9061, 0363-9061 KW - soil mechanics KW - discrete element analysis KW - experimental studies KW - numerical models KW - density KW - loading KW - cohesionless materials KW - stress KW - simulation KW - laboratory studies KW - shear KW - anisotropy KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629939314?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.atitle=Discrete+element+method+analysis+of+non-coaxial+flow+under+rotational+shear&rft.au=Tong%2C+Zhaoxia%3BFu%2C+Pengcheng%3BDafalias%2C+Yannis+F%3BYao%2C+Yangping&rft.aulast=Tong&rft.aufirst=Zhaoxia&rft.date=2014-10-10&rft.volume=38&rft.issue=14&rft.spage=1519&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.issn=03639061&rft_id=info:doi/10.1002%2Fnag.2290 L2 - http://www3.interscience.wiley.com/journal/3312/home 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 - 40 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-12-04 N1 - SubjectsTermNotLitGenreText - anisotropy; cohesionless materials; density; discrete element analysis; experimental studies; laboratory studies; loading; numerical models; shear; simulation; soil mechanics; stress DO - http://dx.doi.org/10.1002/nag.2290 ER - TY - JOUR T1 - Joining techniques for a reduced activation 12Cr steel for inertial fusion energy AN - 1786159885; PQ0002461748 AB - At Lawrence Livermore National Laboratory, we are developing a reduced activation ferritic martensitic steel that is based on the ferritic martensitic steel HT-9. As a part of the development of this steel, we tested a series of welding processes for characterization, including conventional welds (electron beam, tungsten inert gas, and laser) as well as solid-state welds (hot isostatic pressing). We also heat treated the joints at various temperatures between 750 [degrees]C and 1050 [degrees]C to find a suitable normalization scheme. The modified HT-9 reduced activation ferritic martensitic steel appears highly suitable to welding and diffusion bonding. All welds showed good quality fusion zones with insignificant cracking or porosity. Additionally, a heat treatment schedule of 950 [degrees]C for one hour caused minimal grain growth while still converging the hardness of the base metal with that of the fusion and heat-affected zones. Also, modified HT-9 diffusion bonds that were created at temperatures of at least 950 [degrees]C for two hours at 103 MPa had interface tensile strengths of greater than 600 MPa. The diffusion bonds showed no evidence of increased hardness nor void formation at the diffusion bonded interface. JF - Fusion Engineering and Design AU - Hunt, R M AU - El-Dasher, B AU - Choi, B W AU - Torres, S G AD - Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA hunt52@llnl.gov Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 1617 EP - 1622 PB - North-Holland, P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 89 IS - 7-8 SN - 0920-3796, 0920-3796 KW - Solid State and Superconductivity Abstracts (SO); Mechanical & Transportation Engineering Abstracts (MT); METADEX (MD); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - RAFM steel |a MeSH KW - Diffusion bonding |a MeSH KW - HIP |a MeSH KW - Welding |a MeSH KW - Martensitic stainless steels KW - Duplex stainless steels KW - Ferritic stainless steels KW - 12Cr KW - HT9 KW - Steels KW - Activation KW - Welding KW - Hardness KW - Welded joints KW - Diffusion bonding UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786159885?accountid=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=Fusion+Engineering+and+Design&rft.atitle=Joining+techniques+for+a+reduced+activation+12Cr+steel+for+inertial+fusion+energy&rft.au=Hunt%2C+R+M%3BEl-Dasher%2C+B%3BChoi%2C+B+W%3BTorres%2C+S+G&rft.aulast=Hunt&rft.aufirst=R&rft.date=2014-10-01&rft.volume=89&rft.issue=7-8&rft.spage=1617&rft.isbn=&rft.btitle=&rft.title=Fusion+Engineering+and+Design&rft.issn=09203796&rft_id=info:doi/10.1016%2Fj.fusengdes.2014.04.046 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Last updated - 2016-05-03 DO - http://dx.doi.org/10.1016/j.fusengdes.2014.04.046 ER - TY - JOUR T1 - Visualization and Analysis Tools for Ultrascale Climate Data AN - 1712570950; PQ0001957492 AB - Increasingly large climate model simulations are enhancing our understanding of the processes and causes of anthropogenic climate change, thanks to very large public investments in high-performance computing at national and international institutions. Various climate models implement mathematical approximations of nature in different ways, which are often based on differing computational grids. These complex, parallelized coupled system codes combine numerous complex submodels (ocean, atmosphere, land, biosphere, sea ice, land ice, etc.) that represent components of the larger complex climate system. JF - EOS, Transactions, American Geophysical Union AU - Williams, Dean N AD - Lawrence Livermore National Laboratory, Livermore, Calif. Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 377 EP - 378 PB - Wiley Subscription Services, Inc., 1105 N Market St Wilmington DE 19801 VL - 95 IS - 42 SN - 0096-3941, 0096-3941 KW - Sustainability Science Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Climate models KW - Mathematical models KW - Climate KW - Climate change KW - Anthropogenic factors KW - Simulation KW - Atmosphere-ocean-sea ice coupled models KW - Biosphere KW - Atmosphere KW - American Geophysical Union KW - Anthropogenic climate changes KW - Sea ice KW - Numerical simulations KW - Air-sea coupling KW - Oceans KW - Ocean-atmosphere system KW - Land ice KW - Q2 09262:Methods and instruments KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development KW - O 4060:Pollution - Environment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1712570950?accountid=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=EOS%2C+Transactions%2C+American+Geophysical+Union&rft.atitle=Visualization+and+Analysis+Tools+for+Ultrascale+Climate+Data&rft.au=Williams%2C+Dean+N&rft.aulast=Williams&rft.aufirst=Dean&rft.date=2014-10-01&rft.volume=95&rft.issue=42&rft.spage=377&rft.isbn=&rft.btitle=&rft.title=EOS%2C+Transactions%2C+American+Geophysical+Union&rft.issn=00963941&rft_id=info:doi/10.1002%2F2014EO420002 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Mathematical models; Air-sea coupling; Climate change; Ocean-atmosphere system; Anthropogenic factors; Land ice; Sea ice; Climate models; Numerical simulations; Atmosphere-ocean-sea ice coupled models; Biosphere; American Geophysical Union; Anthropogenic climate changes; Oceans; Climate; Simulation; Atmosphere DO - http://dx.doi.org/10.1002/2014EO420002 ER - TY - JOUR T1 - Investigating uranium distribution in surface sediments and waters; a case study of contamination from the Juniper uranium mine, Stanislaus National Forest, CA AN - 1680754337; 2015-043415 AB - The uranium concentrations and isotopic compositions of waters, sediment leachates and sediments from Red Rock Creek in the Stanislaus National Forest of California were measured to investigate the transport of uranium from a point source (the Juniper Uranium Mine) to a natural surface stream environment. The ( (super 234) U)/( (super 238) U) composition of Red Rock Creek is altered downstream of the Juniper Mine. As a result of mine-derived contamination, water ( (super 234) U)/( (super 238) U) ratios are 67% lower than in water upstream of the mine (1.114-1.127 + or - 0.009 in the contaminated waters versus 1.676 in the clean branch of the stream), and sediment samples have activity ratios in equilibrium in the clean creek and out of equilibrium in the contaminated creek (1.041-1.102 + or - 0.007). Uranium concentrations in water, sediment and sediment leachates are highest downstream of the mine, but decrease rapidly after mixing with the clean branch of the stream. Uranium content and compositions of the contaminated creek headwaters relative to the mine tailings of the Juniper Mine suggest that uranium has been weathered from the mine and deposited in the creek. The distribution of uranium between sediment surfaces (leachable fraction) and bulk sediment suggests that adsorption is a key element of transfer along the creek. In clean creek samples, uranium is concentrated in the sediment residues, whereas in the contaminated creek, uranium is concentrated on the sediment surfaces ( approximately 70-80% of uranium in leachable fraction). Contamination only exceeds the EPA maximum contaminant level (MCL) for drinking water in the sample with the closest proximity to the mine. Isotopic characterization of the uranium in this system coupled with concentration measurements suggest that the current state of contamination in Red Rock Creek is best described by mixing between the clean creek and contaminated upper branch of Red Rock Creek rather than mixing directly with mine sediment. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Kayzar, Theresa M AU - Villa, Adam C AU - Lobaugh, Megan L AU - Gaffney, Amy M AU - Williams, Ross W Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 85 EP - 97 PB - Elsevier, Oxford VL - 136 SN - 0265-931X, 0265-931X KW - United States KW - Stanislaus National Forest KW - mining KW - X-ray diffraction data KW - isotopes KW - Stanislaus River basin KW - mass spectra KW - Red Rock Creek KW - California KW - radioactive isotopes KW - mixing KW - Tuolumne County California KW - sediments KW - leachate KW - open-pit mining KW - spectra KW - water pollution KW - mine waste KW - acid mine drainage KW - surface mining KW - pollutants KW - isotope ratios KW - surface water KW - pollution KW - models KW - ICP mass spectra KW - uranium ores KW - metals KW - metal ores KW - streams KW - uranium KW - U-238/U-234 KW - Juniper Mine KW - tailings KW - actinides 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/1680754337?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Investigating+uranium+distribution+in+surface+sediments+and+waters%3B+a+case+study+of+contamination+from+the+Juniper+uranium+mine%2C+Stanislaus+National+Forest%2C+CA&rft.au=Kayzar%2C+Theresa+M%3BVilla%2C+Adam+C%3BLobaugh%2C+Megan+L%3BGaffney%2C+Amy+M%3BWilliams%2C+Ross+W&rft.aulast=Kayzar&rft.aufirst=Theresa&rft.date=2014-10-01&rft.volume=136&rft.issue=&rft.spage=85&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2014.04.018 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 - 58 N1 - Document feature - illus. incl. 4 tables, sketch maps N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - acid mine drainage; actinides; California; ICP mass spectra; isotope ratios; isotopes; Juniper Mine; leachate; mass spectra; metal ores; metals; mine waste; mining; mixing; models; open-pit mining; pollutants; pollution; radioactive isotopes; Red Rock Creek; sediments; spectra; Stanislaus National Forest; Stanislaus River basin; streams; surface mining; surface water; tailings; Tuolumne County California; U-238/U-234; United States; uranium; uranium ores; water pollution; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.jenvrad.2014.04.018 ER - TY - JOUR T1 - Battery/supercapacitor hybrid vianon-covalent functionalization of graphene macro-assemblies AN - 1642331769; 20815142 AB - Binder-free, monolithic, high surface area graphene macro-assemblies (GMAs) are promising materials for supercapacitor electrodes, but, like all graphitic carbon based supercapacitor electrodes, still lack sufficient energy density for demanding practical applications. Here, we demonstrate that the energy storage capacity of GMAs can be increased nearly 3-fold (up to 23 W h kg super(-1)) by facile, non-covalent surface modification with anthraquinone (AQ). AQ provides battery-like redox charge storage (927 C g super(-1)) without affecting the conductivity and capacitance of the GMA support. The resulting AQ-GMA battery/supercapacitor hybrid electrodes demonstrate excellent power performance, show remarkable long-term cycling stability and, by virtue of their excellent mechanical properties, allow for further increases in volumetric energy density by mechanical compression of the treated electrode. Our measured capacity is very close to the theoretical maximum obtained using detailed density functional theory calculations, suggesting nearly all incorporated AQ is made available for charge storage. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Campbell, P G AU - Merrill, MD AU - Wood, B C AU - Montalvo, E AU - Worsley, MA AU - Baumann, T F AU - Biener, J AD - Lawrence Livermore National Laboratory; 7000 East Ave. L-367; Livermore; CA 94550; USA campbell82@llnl.gov Y1 - 2014/10// PY - 2014 DA - Oct 2014 SP - 17764 EP - 17770 PB - Royal Society of Chemistry VL - 2 IS - 42 SN - 2050-7488, 2050-7488 KW - Solid State and Superconductivity Abstracts (SO); Mechanical & Transportation Engineering Abstracts (MT); METADEX (MD); Advanced Polymers Abstracts (EP); Environmental Engineering Abstracts (EN); Composites Industry Abstracts (ED); Engineered Materials Abstracts, Ceramics (EC) KW - Supercapacitors KW - Carbon KW - Graphene KW - Electrodes KW - Battery KW - Charge KW - Capacitors KW - Energy density UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642331769?accountid=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+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.atitle=Battery%2Fsupercapacitor+hybrid+vianon-covalent+functionalization+of+graphene+macro-assemblies&rft.au=Campbell%2C+P+G%3BMerrill%2C+MD%3BWood%2C+B+C%3BMontalvo%2C+E%3BWorsley%2C+MA%3BBaumann%2C+T+F%3BBiener%2C+J&rft.aulast=Campbell&rft.aufirst=P&rft.date=2014-10-01&rft.volume=2&rft.issue=42&rft.spage=17764&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%2Fc4ta03605k LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Number of references - 36 N1 - Last updated - 2015-01-06 DO - http://dx.doi.org/10.1039/c4ta03605k ER - TY - JOUR T1 - A comprehensive dispersion model of surface wave phase and group velocity for the globe AN - 1637533315; 2014-105232 AB - A new method is developed to measure Rayleigh- and Love-wave phase velocities globally using a cluster analysis technique. This method clusters similar waveforms recorded at different stations from a single event and allows users to make measurements on hundreds of waveforms, which are filtered at a series of frequency ranges, at the same time. It also requires minimal amount of user interaction and allows easy assessment of the data quality. This method produces a large amount of phase delay measurements in a manageable time frame. Because there is a strong trade-off between the isotropic part of the Rayleigh-wave phase velocity and azimuthal anisotropy, we include the effect of azimuthal anisotropy in our inversions in order to obtain reliable isotropic phase velocity. We use b-splines to combine these isotropic phase velocity maps with our previous group velocity maps to produce an internally consistent global surface wave dispersion model. JF - Geophysical Journal International AU - Ma, Zhitu AU - Masters, Guy AU - Laske, Gabi AU - Pasyanos, Michael Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 113 EP - 135 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 199 IS - 1 SN - 0956-540X, 0956-540X KW - tomography KW - seismograms KW - guided waves KW - free oscillations KW - global KW - statistical analysis KW - magnitude KW - elastic waves KW - waveforms KW - Rayleigh waves KW - cluster analysis KW - spatial distribution KW - surface waves KW - Love waves KW - traveltime KW - seismic waves KW - wave dispersion KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637533315?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+comprehensive+dispersion+model+of+surface+wave+phase+and+group+velocity+for+the+globe&rft.au=Ma%2C+Zhitu%3BMasters%2C+Guy%3BLaske%2C+Gabi%3BPasyanos%2C+Michael&rft.aulast=Ma&rft.aufirst=Zhitu&rft.date=2014-10-01&rft.volume=199&rft.issue=1&rft.spage=113&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu246 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 - 52 N1 - Document feature - illus. incl. 1 table, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-12-18 N1 - SubjectsTermNotLitGenreText - cluster analysis; earthquakes; elastic waves; free oscillations; global; guided waves; Love waves; magnitude; Rayleigh waves; seismic waves; seismograms; spatial distribution; statistical analysis; surface waves; tomography; traveltime; wave dispersion; waveforms DO - http://dx.doi.org/10.1093/gji/ggu246 ER - TY - JOUR T1 - Interactions between cumulus convection and its environment as revealed by the MC3E sounding array AN - 1635018541; 21007952 AB - This study attempts to understand interactions between midlatitude convective systems and their environments through a heat and moisture budget analysis using the sounding data collected from the Midlatitude Continental Convective Clouds Experiment (MC3E) in central Oklahoma. Distinct large-scale structures and diabatic heating and drying profiles are presented for cases of weaker and elevated thunderstorms as well as intense squall line and supercell thunderstorm events during the campaign. The elevated cell events were nocturnal convective systems occurring in an environment having low convective available potential energy (CAPE) and a very dry boundary layer. In contrast, deeper convective events happened during the morning into early afternoon within an environment associated with large CAPE and a near-saturated boundary layer. As the systems reached maturity, the diagnosed diabatic heating in the latter deep convective cases was much stronger and of greater vertical extent than the former. Both groups showed considerable diabatic cooling in the lower troposphere, associated with the evaporation of precipitation and low-level clouds. The horizontal advection of moisture also played a dominant role in moistening the lower troposphere, particularly for the deeper convective events, wherein the near surface southeasterly flow allows persistent low-level moisture return from the Gulf of Mexico to support convection. The moisture convergence often was present before these systems develop, suggesting a strong correlation between the large-scale moisture convergence and convection. Sensitivity tests indicated that the uncertainty in the surface precipitation and the size of analysis domain mainly affected the magnitude of these analyzed fields rather than their vertical structures. Key Points * Elevated storms and squall lines occur in very different environments * Squall lines show much stronger heating than the elevated storms JF - Journal of Geophysical Research: Atmospheres AU - Xie, Shaocheng AU - Zhang, Yunyan AU - Giangrande, Scott E AU - Jensen, Michael P AU - McCoy, Renata AU - Zhang, Minghua AD - Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 11 EP - 11,808 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 119 IS - 20 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Convection KW - Evaporation KW - Rainfall KW - Boundary Layers KW - Correlations KW - Convective available potential energy KW - Thunderstorms KW - Convection development KW - Convective systems KW - Gulfs KW - Storms KW - Advection KW - Potential energy KW - USA, Oklahoma KW - Squalls KW - Convergence KW - Maturity KW - Moisture budget KW - Atmospheric precipitations KW - Sensitivity KW - Diabatic heating KW - Troposphere KW - Drying KW - Soundings KW - Precipitation KW - Vertical profiles KW - ASW, Mexico Gulf KW - Clouds KW - Lower troposphere KW - Boundary layers KW - Evaporation of precipitation KW - Convective activity KW - Budgets KW - Advection of moisture KW - Squall lines KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 0810:General KW - M2 556.13:Evaporation/Evapotranspiration (556.13) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1635018541?accountid=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=Interactions+between+cumulus+convection+and+its+environment+as+revealed+by+the+MC3E+sounding+array&rft.au=Xie%2C+Shaocheng%3BZhang%2C+Yunyan%3BGiangrande%2C+Scott+E%3BJensen%2C+Michael+P%3BMcCoy%2C+Renata%3BZhang%2C+Minghua&rft.aulast=Xie&rft.aufirst=Shaocheng&rft.date=2014-10-01&rft.volume=119&rft.issue=20&rft.spage=11&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2014JD022011 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Atmospheric precipitations; Convection; Boundary layers; Drying; Thunderstorms; Troposphere; Soundings; Vertical profiles; Potential energy; Diabatic heating; Correlations; Convective available potential energy; Convection development; Convective systems; Storms; Clouds; Lower troposphere; Convergence; Convective activity; Evaporation of precipitation; Advection of moisture; Squall lines; Moisture budget; Sensitivity; Evaporation; Rainfall; Advection; Budgets; Maturity; Squalls; Boundary Layers; Precipitation; Gulfs; USA, Oklahoma; ASW, Mexico Gulf DO - http://dx.doi.org/10.1002/2014JD022011 ER - TY - JOUR T1 - A young solidification age for the lunar magma ocean AN - 1664434139; 2015-023270 AB - The time at which the lunar magma ocean solidified can be determined from the Lu-Hf isotope systematics of lunar rocks derived from magma sources that formed during crystallization of the lunar magma ocean. The final magma ocean crystallization product, termed urKREEP, is enriched in incompatible elements including K, REE and P. We have determined the initial Hf isotopic compositions of four samples, two KREEP basalts and two Mg-suite norites. The incompatible trace element compositions of these samples are controlled by an urKREEP component, and therefore the initial Hf isotopic compositions of these samples represent the Hf isotopic evolution of urKREEP. In order to correct the effects of neutron irradiation on the Hf isotopic compositions of these samples, we have developed a model that uses the stable Hf and Sm isotopic compositions measured on an irradiated sample to determine and correct for the thermal and epithermal neutron fluence that has modified the Hf isotopic composition of the sample. We use our corrected results to calculate a (super 176) Lu- (super 176) Hf urKREEP model age of 4353 + or - 37 Ma and the (super 176) Lu/ (super 177) Hf of urKREEP to be 0.0153 + or - 0.0033. The Lu-Hf model age is concordant with the re-calculated Sm-Nd urKREEP model age of 4389 + or - 45 Ma, and we take the average of these ages, 4368 + or - 29 Ma, to represent the time at which urKREEP formed. This age is concordant with the age of the most reliably dated ferroan noritic anorthosite as well as (super 142) Nd model ages for the formation or re-equilibration of mare basalt sources. Taken together, these ages indicate that the Moon experienced a widespread, large-scale magmatic event around 4370 Ma, most plausibly attributed to solidification of the lunar magma ocean. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Gaffney, Amy M AU - Borg, Lars E Y1 - 2014/09/01/ PY - 2014 DA - 2014 Sep 01 SP - 227 EP - 240 PB - Elsevier, New York, NY VL - 140 SN - 0016-7037, 0016-7037 KW - volcanic rocks KW - urKREEP KW - isotopes KW - igneous rocks KW - mass spectra KW - Lu/Hf KW - radioactive isotopes KW - plutonic rocks KW - hafnium KW - dates KW - basalts KW - absolute age KW - Archean KW - spectra KW - rare earths KW - norite KW - chemical composition KW - geochemistry KW - high-field-strength elements KW - magma oceans KW - petrology KW - Precambrian KW - Moon KW - cosmochemistry KW - solidification KW - ICP mass spectra KW - KREEP KW - lunar interior KW - metals KW - magmas KW - planetary interiors KW - crystallization KW - gabbros KW - neodymium KW - consolidation KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664434139?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+young+solidification+age+for+the+lunar+magma+ocean&rft.au=Gaffney%2C+Amy+M%3BBorg%2C+Lars+E&rft.aulast=Gaffney&rft.aufirst=Amy&rft.date=2014-09-01&rft.volume=140&rft.issue=&rft.spage=227&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.05.028 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 - 75 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-03-19 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - absolute age; Archean; basalts; chemical composition; consolidation; cosmochemistry; crystallization; dates; gabbros; geochemistry; hafnium; high-field-strength elements; ICP mass spectra; igneous rocks; isotopes; KREEP; Lu/Hf; lunar interior; magma oceans; magmas; mass spectra; metals; Moon; neodymium; norite; petrology; planetary interiors; plutonic rocks; Precambrian; radioactive isotopes; rare earths; solidification; spectra; urKREEP; volcanic rocks DO - http://dx.doi.org/10.1016/j.gca.2014.05.028 ER - TY - JOUR T1 - The value of spatial information for determining well placement; a geothermal example AN - 1656039192; 2015-016351 AB - We have developed a spatial, value of information (VOI) methodology that is designed specifically to include the inaccuracies of multidimensional geophysical inversions. VOI assesses the worth of information in terms of how it can improve the decision maker's likelihood of a higher valued outcome. VOI can be applied to spatial data using an exploration example for hidden geothermal resources. This methodology is applicable for spatial decisions for other exploration decisions (e.g., oil, mining, etc.). This example evaluates how well the magnetotelluric (MT) technique is able to delineate the lateral position of electrically conductive materials that are indicative of a hidden geothermal resource. The conductive structure (referred to as the clay cap) represented where the geothermal alteration occurred. The prior uncertainty of the position of the clay cap (drilling target) is represented with multiple earth models. These prior models are used to numerically simulate the data collection, noise, inversion, and interpretation of the MT technique. MT's ability to delineate the correct lateral location can be quantified by comparing the true location in each prior model to the location that is interpreted from each respective inverted model. Additional complexity in the earth models is included by adding more electrical conductors (not associated with the clay cap) and deeper targets. Both degrade the ability of the MT technique (the signal and inversion) to locate the clay cap thereby decreasing the VOI. The results indicate the ability of the prior uncertainty to increase and decrease the final VOI assessment. The results also demonstrate how VOI depends on whether or not a resource still exists below the clay cap because the clay cap is only a potential indicator of economic temperatures. JF - Geophysics AU - Trainor-Guitton, Whitney J AU - Hoversten, G Michael AU - Ramirez, Abelardo AU - Roberts, Jeffery AU - Juliusson, Egill AU - Key, Kerry AU - Mellors, Robert Y1 - 2014/09// PY - 2014 DA - September 2014 SP - W27 EP - W41 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 79 IS - 5 SN - 0016-8033, 0016-8033 KW - geophysical surveys KW - spatial data KW - geothermal wells KW - geophysical methods KW - optimization KW - decision-making KW - magnetotelluric methods KW - geothermal energy KW - geothermal exploration KW - surveys KW - applications KW - drilling 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/1656039192?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+value+of+spatial+information+for+determining+well+placement%3B+a+geothermal+example&rft.au=Trainor-Guitton%2C+Whitney+J%3BHoversten%2C+G+Michael%3BRamirez%2C+Abelardo%3BRoberts%2C+Jeffery%3BJuliusson%2C+Egill%3BKey%2C+Kerry%3BMellors%2C+Robert&rft.aulast=Trainor-Guitton&rft.aufirst=Whitney&rft.date=2014-09-01&rft.volume=79&rft.issue=5&rft.spage=W27&rft.isbn=&rft.btitle=&rft.title=Geophysics&rft.issn=00168033&rft_id=info:doi/10.1190%2Fgeo2013-0337.1 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 - 28 N1 - PubXState - OK N1 - Document feature - illus. incl. 7 tables N1 - Last updated - 2015-02-19 N1 - CODEN - GPYSA7 N1 - SubjectsTermNotLitGenreText - applications; decision-making; drilling; geophysical methods; geophysical surveys; geothermal energy; geothermal exploration; geothermal wells; magnetotelluric methods; optimization; spatial data; surveys DO - http://dx.doi.org/10.1190/geo2013-0337.1 ER - TY - JOUR T1 - Size dependent spall aspect ratio and its effects in thermal spallation AN - 1648905906; 2015-011286 JF - International Journal of Rock Mechanics and Mining Sciences (1997) AU - Walsh, Stuart D C AU - Lomov, Ilya N AU - Wideman, Thomas W AU - Potter, Jared M Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 375 EP - 380 PB - Elsevier, Oxford-New York VL - 70 SN - 1365-1609, 1365-1609 KW - heat flux KW - numerical models KW - density KW - thermal conductivity KW - igneous rocks KW - granites KW - thermal properties KW - mathematical models KW - rock mechanics KW - spalling KW - plutonic rocks KW - heat flow KW - drilling KW - compressive strength KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648905906?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Size+dependent+spall+aspect+ratio+and+its+effects+in+thermal+spallation&rft.au=Walsh%2C+Stuart+D+C%3BLomov%2C+Ilya+N%3BWideman%2C+Thomas+W%3BPotter%2C+Jared+M&rft.aulast=Walsh&rft.aufirst=Stuart+D&rft.date=2014-09-01&rft.volume=70&rft.issue=&rft.spage=375&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.2014.05.010 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 - 39 N1 - Document feature - illus. N1 - Last updated - 2015-01-29 N1 - CODEN - IJRMA2 N1 - SubjectsTermNotLitGenreText - compressive strength; density; drilling; granites; heat flow; heat flux; igneous rocks; mathematical models; numerical models; plutonic rocks; rock mechanics; spalling; thermal conductivity; thermal properties DO - http://dx.doi.org/10.1016/j.ijrmms.2014.05.010 ER - TY - JOUR T1 - Modulation of Medium pH by Caulobacter crescentus Facilitates Recovery from Uranium-Induced Growth Arrest AN - 1566847079; 20698321 AB - The oxidized form of uranium [U(VI)] predominates in oxic environments and poses a major threat to ecosystems. Due to its ability to mineralize U(VI), the oligotroph Caulobacter crescentus is an attractive candidate for U(VI) bioremediation. However, the physiological basis for U(VI) tolerance is unclear. Here we demonstrated that U(VI) caused a temporary growth arrest in C. crescentus and three other bacterial species, although the duration of growth arrest was significantly shorter for C. crescentus. During the majority of the growth arrest period, cell morphology was unaltered and DNA replication initiation was inhibited. However, during the transition from growth arrest to exponential phase, cells with shorter stalks were observed, suggesting a decoupling between stalk development and the cell cycle. Upon recovery from growth arrest, C. crescentus proliferated with a growth rate comparable to that of a control without U(VI), although a fraction of these cells appeared filamentous with multiple replication start sites. Normal cell morphology was restored by the end of exponential phase. Cells did not accumulate U(VI) resistance mutations during the prolonged growth arrest, but rather, a reduction in U(VI) toxicity occurred concomitantly with an increase in medium pH. Together, these data suggest that C. crescentus recovers from U(VI)-induced growth arrest by reducing U(VI) toxicity through pH modulation. Our finding represents a unique U(VI) detoxification strategy and provides insight into how microbes cope with U(VI) under nongrowing conditions, a metabolic state that is prevalent in natural environments. JF - Applied and Environmental Microbiology AU - Park, Dan M AU - Jiao, Yongqin PY - 2014 SP - 5680 EP - 5688 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 United States VL - 80 IS - 18 SN - 0099-2240, 0099-2240 KW - Toxicology Abstracts; Microbiology Abstracts B: Bacteriology; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Detoxification KW - Growth rate KW - DNA biosynthesis KW - Bioremediation KW - Data processing KW - Replication KW - Cell cycle KW - Development KW - Toxicity KW - Caulobacter crescentus KW - Replication initiation KW - Uranium KW - Cytology KW - pH effects KW - Mutation KW - X 24390:Radioactive Materials KW - A 01340:Antibiotics & Antimicrobials KW - J 02320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566847079?accountid=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=Modulation+of+Medium+pH+by+Caulobacter+crescentus+Facilitates+Recovery+from+Uranium-Induced+Growth+Arrest&rft.au=Park%2C+Dan+M%3BJiao%2C+Yongqin&rft.aulast=Park&rft.aufirst=Dan&rft.date=2014-09-01&rft.volume=80&rft.issue=18&rft.spage=5680&rft.isbn=&rft.btitle=&rft.title=Applied+and+Environmental+Microbiology&rft.issn=00992240&rft_id=info:doi/10.1128%2FAEM.01294-14 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 47 N1 - Last updated - 2016-01-21 N1 - SubjectsTermNotLitGenreText - Growth rate; Detoxification; DNA biosynthesis; Data processing; Bioremediation; Replication; Cell cycle; Toxicity; Development; Replication initiation; Uranium; Cytology; Mutation; pH effects; Caulobacter crescentus DO - http://dx.doi.org/10.1128/AEM.01294-14 ER - TY - JOUR T1 - Diffusion of multi-isotopic chemical species in molten silicates AN - 1560082667; 2014-069271 AB - Diffusion experiments in a simplified Na (sub 2) O-CaO-SiO (sub 2) liquid system are used to develop a general formulation for the fractionation of Ca isotopes during liquid-phase diffusion. Although chemical diffusion is a well-studied process, the mathematical description of the effects of diffusion on the separate isotopes of a chemical element is surprisingly underdeveloped and uncertain. Kinetic theory predicts a mass dependence on isotopic mobility, but it is unknown how this translates into a mass dependence on effective binary diffusion coefficients, or more generally, the chemical diffusion coefficients that are housed in a multicomponent diffusion matrix. Our experiments are designed to measure Ca mobility, effective binary diffusion coefficients, the multicomponent diffusion matrix, and the effects of chemical diffusion on Ca isotopes in a liquid of single composition. We carried out two chemical diffusion experiments and one self-diffusion experiment, all at 1250 degrees C and 0.7 GPa and using a bulk composition for which other information is available from the literature. The self-diffusion experiment is used to determine the mobility of Ca in the absence of diffusive fluxes of other liquid components. The chemical diffusion experiments are designed to determine the effect on Ca isotope fractionation of changing the counter-diffusing component from fast-diffusing Na (sub 2) O to slow-diffusing SiO (sub 2) . When Na (sub 2) O is the main counter-diffusing species, CaO diffusion is fast and larger Ca isotopic effects are generated. When SiO (sub 2) is the main counter-diffusing species, CaO diffusion is slow and smaller Ca isotopic effects are observed. In both experiments, the liquid is initially isotopically homogeneous, and during the experiment Ca isotopes become fractionated by diffusion. The results are used as a test of a new general expression for the diffusion of isotopes in a multicomponent liquid system that accounts for both self diffusion and the effects of counter-diffusing species. Our results show that (1) diffusive isotopic fractionations depend on the direction of diffusion in composition space, (2) diffusive isotopic fractionations scale with effective binary diffusion coefficient, as previously noted by Watkins et al. (2011), (3) self-diffusion is not decoupled from chemical diffusion, (4) self diffusion can be faster than or slower than chemical diffusion and (5) off-diagonal terms in the chemical diffusion matrix have isotopic mass-dependence. The results imply that relatively large isotopic fractionations can be generated by multicomponent diffusion even in the absence of large concentration gradients of the diffusing element. The new formulations for isotope diffusion can be tested with further experimentation and provide an improved framework for interpreting mass-dependent isotopic variations in natural liquids. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Watkins, James M AU - Liang, Yan AU - Richter, Frank AU - Ryerson, Frederick J AU - DePaolo, Donald J Y1 - 2014/08/15/ PY - 2014 DA - 2014 Aug 15 SP - 313 EP - 326 PB - Elsevier, New York, NY VL - 139 SN - 0016-7037, 0016-7037 KW - silicates KW - calcium KW - isotope fractionation KW - calcium oxide KW - isotopes KW - thermal ionization mass spectra KW - mass spectra KW - stable isotopes KW - melts KW - electron probe data KW - major elements KW - silica KW - sodium oxides KW - oxides KW - spectra KW - chemical composition KW - kinetics KW - P-T conditions KW - alkaline earth metals KW - experimental studies KW - diffusion KW - isotope ratios KW - silicate melts KW - models KW - Ca-44/Ca-40 KW - metals KW - mathematical methods KW - crystal chemistry KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560082667?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Diffusion+of+multi-isotopic+chemical+species+in+molten+silicates&rft.au=Watkins%2C+James+M%3BLiang%2C+Yan%3BRichter%2C+Frank%3BRyerson%2C+Frederick+J%3BDePaolo%2C+Donald+J&rft.aulast=Watkins&rft.aufirst=James&rft.date=2014-08-15&rft.volume=139&rft.issue=&rft.spage=313&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.04.039 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 - 30 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-11-13 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Ca-44/Ca-40; calcium; calcium oxide; chemical composition; crystal chemistry; diffusion; electron probe data; experimental studies; isotope fractionation; isotope ratios; isotopes; kinetics; major elements; mass spectra; mathematical methods; melts; metals; models; oxides; P-T conditions; silica; silicate melts; silicates; sodium oxides; spectra; stable isotopes; thermal ionization mass spectra DO - http://dx.doi.org/10.1016/j.gca.2014.04.039 ER - TY - CPAPER T1 - How roots, climate, and edaphic controllers shape the rhizosphere microbiome of a wild annual grass T2 - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AN - 1645180177; 6319669 JF - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AU - Nuccio, Erin AU - Anderson-Furgeson, James AU - Estera, Katerina AU - Herman, Donald AU - Pett-Ridge, Jennifer AU - Brodie, Eoin AU - Firestone, Mary Y1 - 2014/08/10/ PY - 2014 DA - 2014 Aug 10 KW - Grasses KW - Rhizosphere KW - Climate KW - Roots UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645180177?accountid=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=How+roots%2C+climate%2C+and+edaphic+controllers+shape+the+rhizosphere+microbiome+of+a+wild+annual+grass&rft.au=Nuccio%2C+Erin%3BAnderson-Furgeson%2C+James%3BEstera%2C+Katerina%3BHerman%2C+Donald%3BPett-Ridge%2C+Jennifer%3BBrodie%2C+Eoin%3BFirestone%2C+Mary&rft.aulast=Nuccio&rft.aufirst=Erin&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 - Fall, recovery, and characterization of the Novato L6 chondrite breccia AN - 1623256328; 2014-089195 AB - The Novato L6 chondrite fragmental breccia fell in California on 17 October 2012, and was recovered after the Cameras for Allsky Meteor Surveillance (CAMS) project determined the meteor's trajectory between 95 and 46 km altitude. The final fragmentation from 42 to 22 km altitude was exceptionally well documented by digital photographs. The first sample was recovered before rain hit the area. First results from a consortium study of the meteorite's characterization, cosmogenic and radiogenic nuclides, origin, and conditions of the fall are presented. Some meteorites did not retain fusion crust and show evidence of spallation. Before entry, the meteoroid was 35 + or - 5 cm in diameter (mass 80 + or - 35 kg) with a cosmic-ray exposure age of 9 + or - 1 Ma, if it had a one-stage exposure history. A two-stage exposure history is more likely, with lower shielding in the last few Ma. Thermoluminescence data suggest a collision event within the last approximately 0.1 Ma. Novato probably belonged to the class of shocked L chondrites that have a common shock age of 470 Ma, based on the U,Th-He age of 420 + or - 220 Ma. The measured orbits of Novato, Jesenice, and Innisfree are consistent with a proposed origin of these shocked L chondrites in the Gefion asteroid family, perhaps directly via the 5:2 mean-motion resonance with Jupiter. Novato experienced a stronger compaction than did other L6 chondrites of shock-stage S4. Despite this, a freshly broken surface shows a wide range of organic compounds. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Jenniskens, Peter AU - Rubin, Alan E AU - Yin, Qing-Zhu AU - Sears, Derek W G AU - Sandford, Scott A AU - Zolensky, Michael E AU - Krot, Alexander N AU - Blair, Leigh AU - Kane, Darci AU - Utas, Jason AU - Verish, Robert AU - Friedrich, Jon M AU - Wimpenny, Josh AU - Eppich, Gary R AU - Ziegler, Karen AU - Verosub, Kenneth L AU - Rowland, Douglas J AU - Albers, Jim AU - Gural, Peter S AU - Grigsby, Bryant AU - Fries, Marc D AU - Matson, Robert AU - Johnston, Malcolm AU - Silber, Elizabeth AU - Brown, Peter AU - Yamakawa, Akane AU - Sanborn, Matthew E AU - Laubenstein, Matthias AU - Welten, Kees C AU - Nishiizumi, Kunihiko AU - Meier, Matthias M M AU - Busemann, Henner AU - Clay, Patricia AU - Caffee, Marc W AU - Schmitt-Kopplin, Phillipe AU - Hertkorn, Norbert AU - Glavin, Daniel P AU - Callahan, Michael P AU - Dworkin, Jason P AU - Wu, Qinghao AU - Zare, Richard N AU - Grady, Monica M AU - Verchovsky, Sasha AU - Emel'Yanenko, Vacheslav AU - Naroenkov, Sergey AU - Clark, David L AU - Girten, Beverly AU - Worden, Peter S Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 1388 EP - 1425 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 8 SN - 1086-9379, 1086-9379 KW - United States KW - ordinary chondrites KW - fragmentation KW - stony meteorites KW - asteroids KW - isotopes KW - orbits KW - altitude KW - meteoroids KW - L chondrites KW - exposure age KW - stable isotopes KW - magnetic properties KW - California KW - (U-Th)/He KW - meteorites KW - dates KW - absolute age KW - X-ray fluorescence spectra KW - cosmic rays KW - spectra KW - chondrites KW - chemical composition KW - Cameras for Allsky Meteor Surveillance project KW - breccia KW - parent bodies KW - trajectories KW - mechanical properties KW - metamorphism KW - Gefion asteroid family KW - meteorite falls KW - size KW - Novato Meteorite KW - compaction KW - organic compounds KW - magnetic susceptibility KW - petrography KW - shock metamorphism KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256328?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Fall%2C+recovery%2C+and+characterization+of+the+Novato+L6+chondrite+breccia&rft.au=Jenniskens%2C+Peter%3BRubin%2C+Alan+E%3BYin%2C+Qing-Zhu%3BSears%2C+Derek+W+G%3BSandford%2C+Scott+A%3BZolensky%2C+Michael+E%3BKrot%2C+Alexander+N%3BBlair%2C+Leigh%3BKane%2C+Darci%3BUtas%2C+Jason%3BVerish%2C+Robert%3BFriedrich%2C+Jon+M%3BWimpenny%2C+Josh%3BEppich%2C+Gary+R%3BZiegler%2C+Karen%3BVerosub%2C+Kenneth+L%3BRowland%2C+Douglas+J%3BAlbers%2C+Jim%3BGural%2C+Peter+S%3BGrigsby%2C+Bryant%3BFries%2C+Marc+D%3BMatson%2C+Robert%3BJohnston%2C+Malcolm%3BSilber%2C+Elizabeth%3BBrown%2C+Peter%3BYamakawa%2C+Akane%3BSanborn%2C+Matthew+E%3BLaubenstein%2C+Matthias%3BWelten%2C+Kees+C%3BNishiizumi%2C+Kunihiko%3BMeier%2C+Matthias+M+M%3BBusemann%2C+Henner%3BClay%2C+Patricia%3BCaffee%2C+Marc+W%3BSchmitt-Kopplin%2C+Phillipe%3BHertkorn%2C+Norbert%3BGlavin%2C+Daniel+P%3BCallahan%2C+Michael+P%3BDworkin%2C+Jason+P%3BWu%2C+Qinghao%3BZare%2C+Richard+N%3BGrady%2C+Monica+M%3BVerchovsky%2C+Sasha%3BEmel%27Yanenko%2C+Vacheslav%3BNaroenkov%2C+Sergey%3BClark%2C+David+L%3BGirten%2C+Beverly%3BWorden%2C+Peter+S&rft.aulast=Jenniskens&rft.aufirst=Peter&rft.date=2014-08-01&rft.volume=49&rft.issue=8&rft.spage=1388&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12323 L2 - http://cavern.uark.edu/~meteor/ 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 - 124 N1 - PubXState - AR N1 - Document feature - illus. incl. 14 tables N1 - Last updated - 2014-11-13 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - (U-Th)/He; absolute age; altitude; asteroids; breccia; California; Cameras for Allsky Meteor Surveillance project; chemical composition; chondrites; compaction; cosmic rays; dates; exposure age; fragmentation; Gefion asteroid family; isotopes; L chondrites; magnetic properties; magnetic susceptibility; mechanical properties; metamorphism; meteorite falls; meteorites; meteoroids; Novato Meteorite; orbits; ordinary chondrites; organic compounds; parent bodies; petrography; shock metamorphism; size; spectra; stable isotopes; stony meteorites; trajectories; United States; X-ray fluorescence spectra DO - http://dx.doi.org/10.1111/maps.12323 ER - TY - JOUR T1 - Derivatization of pinacolyl alcohol with phenyldimethylchlorosilane for enhanced detection by gas chromatography-mass spectrometry AN - 1620036149; 20641819 AB - A derivatization procedure for the qualitative gas chromatography-mass spectrometry (GC-MS) analysis of pinacolyl alcohol (PA) that employs phenyldimethylchlorosilane (PhDMCIS) and the promoter N-methylimidazole is described. While PA, underivatized, can be detected using conventional gas chromatographic methods, its polarity and low boiling point make its detection in complex matrices challenging. The silylation procedure described herein generates a PA-derivative exhibiting an increased on-column retention time, thus shifting its GC-MS signal away from commonly encountered, volatile, interfering analytes. Derivatized PA could be distinguished from other PhDMCIS-derivatized isomeric alcohols by its unique retention time and mass spectrum. The derivatization was demonstrated to perform well in the GC-MS analysis and identification of PA in samples from Proficiency Tests administered by the Organisation for the Prohibition of Chemical Weapons (OPCW). JF - Analytical and Bioanalytical Chemistry AU - Albo, Rebecca L F AU - Valdez, Carlos A AU - Leif, Roald N AU - Mulcahy, Heather A AU - Koester, Carolyn AD - Lawrence Livermore National Laboratory, Forensic Science Center, 7000 East Avenue, Livermore, CA 94550, USA, valdezll@llnl.gov Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 5231 EP - 5234 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 406 IS - 21 SN - 1618-2642, 1618-2642 KW - Aqualine Abstracts; Water Resources Abstracts KW - Chemical warfare agents KW - Soman KW - Pinacolyl alcohol KW - Silylation KW - GC-MS KW - Phenyldimethylchlorosilane KW - Testing Procedures KW - Alcohols KW - Retention Time KW - Polarity KW - AQ 00001:Water Resources and Supplies KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1620036149?accountid=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=Analytical+and+Bioanalytical+Chemistry&rft.atitle=Derivatization+of+pinacolyl+alcohol+with+phenyldimethylchlorosilane+for+enhanced+detection+by+gas+chromatography-mass+spectrometry&rft.au=Albo%2C+Rebecca+L+F%3BValdez%2C+Carlos+A%3BLeif%2C+Roald+N%3BMulcahy%2C+Heather+A%3BKoester%2C+Carolyn&rft.aulast=Albo&rft.aufirst=Rebecca+L&rft.date=2014-08-01&rft.volume=406&rft.issue=21&rft.spage=5231&rft.isbn=&rft.btitle=&rft.title=Analytical+and+Bioanalytical+Chemistry&rft.issn=16182642&rft_id=info:doi/10.1007%2Fs00216-014-7625-y LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Number of references - 7 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Testing Procedures; Alcohols; Retention Time; Polarity DO - http://dx.doi.org/10.1007/s00216-014-7625-y ER - TY - JOUR T1 - Biomineralization of Uranium by PhoY Phosphatase Activity Aids Cell Survival in Caulobacter crescentus AN - 1560140797; 20602685 AB - Caulobacter crescentus is known to tolerate high levels of uranium [U(VI)], but its detoxification mechanism is poorly understood. Here we show that C. crescentus is able to facilitate U(VI) biomineralization through the formation of U-Pi precipitates via its native alkaline phosphatase activity. The U-Pi precipitates, deposited on the cell surface in the form of meta-autunite structures, have a lower U/Pi ratio than do chemically produced precipitates. The enzyme that is responsible for the phosphatase activity and thus the biomineralization process is identified as PhoY, a periplasmic alkaline phosphatase with broad substrate specificity. Furthermore, PhoY is shown to confer a survival advantage on C. crescentus toward U(VI) under both growth and nongrowth conditions. Results obtained in this study thus highlight U(VI) biomineralization as a resistance mechanism in microbes, which not only improves our understanding of bacterium-mineral interactions but also aids in defining potential ecological niches for metal-resistant bacteria. JF - Applied and Environmental Microbiology AU - Yung, Mimi C AU - Jiao, Yongqin Y1 - 2014/08// PY - 2014 DA - Aug 2014 SP - 4795 EP - 4804 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 USA, [URL:http://www.asm.org/] VL - 80 IS - 16 SN - 0099-2240, 0099-2240 KW - Toxicology Abstracts; Virology & AIDS Abstracts; Microbiology Abstracts B: Bacteriology; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Cell survival KW - Detoxification KW - Cell surface KW - Alkaline phosphatase KW - Uranium KW - Niches KW - Substrate specificity KW - Enzymes KW - Mineralization KW - Caulobacter crescentus KW - X 24390:Radioactive Materials KW - V 22360:AIDS and HIV KW - A 01450:Environmental Pollution & Waste Treatment KW - J 02320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560140797?accountid=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=Biomineralization+of+Uranium+by+PhoY+Phosphatase+Activity+Aids+Cell+Survival+in+Caulobacter+crescentus&rft.au=Yung%2C+Mimi+C%3BJiao%2C+Yongqin&rft.aulast=Yung&rft.aufirst=Mimi&rft.date=2014-08-01&rft.volume=80&rft.issue=16&rft.spage=4795&rft.isbn=&rft.btitle=&rft.title=Applied+and+Environmental+Microbiology&rft.issn=00992240&rft_id=info:doi/10.1128%2FAEM.01050-14 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 48 N1 - Last updated - 2014-12-11 N1 - SubjectsTermNotLitGenreText - Detoxification; Cell survival; Cell surface; Alkaline phosphatase; Niches; Uranium; Enzymes; Substrate specificity; Mineralization; Caulobacter crescentus DO - http://dx.doi.org/10.1128/AEM.01050-14 ER - TY - JOUR T1 - A compatibly differenced total energy conserving form of SPH AN - 1547845158; 20288546 AB - We describe a modified form of smoothed particle hydrodynamics (SPH) in which the specific thermal energy equation is based on a compatibly differenced formalism, guaranteeing exact conservation of the total energy. We compare the errors and convergence rates of the standard and compatible SPH formalisms on a variety of shock test problems with analytic answers. We find that the new compatible formalism reliably achieves the expected first-order convergence for these analytic shock tests and, in all cases, improves the accuracy of the numerical solution over the standard formalism. We also examine the performance of our new formalism on a more complicated applied problem: the diversion of an asteroid by a kinetic impactor. We find the compatible discretization demonstrates measurable improvement in the convergence of properties such as the deflection velocity in this kind of applied problem as well. Copyright copyright 2014 John Wiley & Sons, Ltd. We derive an exactly energy conserving form of SPH based on compatibly differencing the momentum and energy equations. We quantitatively demonstrate this formalism improves our solutions using analytic and applied test problems. This figure shows an applied test case where we model the impact of an Al slug traveling at 12km/s impacting a round 50m asteroid. The figure is colored by damage and shows the crater as well as fractures extending throughout the body. JF - International Journal for Numerical Methods in Fluids AU - Michael Owen, J AD - Lawrence Livermore National Laboratory, M/S L-38, Livermore, CA, 94550, USA. Y1 - 2014/08// PY - 2014 DA - Aug 2014 SP - 749 EP - 774 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 75 IS - 11 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Testing Procedures KW - Mathematical models KW - Fractures KW - Velocity KW - Model Testing KW - Deflection KW - Energy Equation KW - Performance Evaluation KW - Kinetics KW - Fluid dynamics KW - Standards KW - Diversion KW - SW 5010:Network design KW - AQ 00006:Sewage KW - Q2 09123:Conservation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1547845158?accountid=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+compatibly+differenced+total+energy+conserving+form+of+SPH&rft.au=Michael+Owen%2C+J&rft.aulast=Michael+Owen&rft.aufirst=J&rft.date=2014-08-01&rft.volume=75&rft.issue=11&rft.spage=749&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.3912 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-07-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mathematical models; Fractures; Fluid dynamics; Deflection; Testing Procedures; Energy Equation; Performance Evaluation; Kinetics; Velocity; Standards; Model Testing; Diversion DO - http://dx.doi.org/10.1002/fld.3912 ER - TY - JOUR T1 - Ramp compression of diamond to five terapascals AN - 1660629898; 2015-021562 JF - Nature (London) AU - Smith, R F AU - Eggert, J H AU - Jeanloz, R AU - Duffy, T S AU - Braun, D G AU - Patterson, J R AU - Rudd, R E AU - Biener, J AU - Lazicki, A E AU - Hamza, A V AU - Wang, J AU - Braun, T AU - Benedict, L X AU - Celliers, P M AU - Collins, G W Y1 - 2014/07/17/ PY - 2014 DA - 2014 Jul 17 SP - 330 EP - 333 PB - Macmillan Journals, London VL - 511 IS - 7509 SN - 0028-0836, 0028-0836 KW - experimental studies KW - pressure KW - extrasolar planets KW - native elements KW - high pressure KW - size KW - giant planets KW - models KW - planets KW - laboratory studies KW - planetary interiors KW - diamond KW - terrestrial comparison KW - equations of state KW - compression KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660629898?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Ramp+compression+of+diamond+to+five+terapascals&rft.au=Smith%2C+R+F%3BEggert%2C+J+H%3BJeanloz%2C+R%3BDuffy%2C+T+S%3BBraun%2C+D+G%3BPatterson%2C+J+R%3BRudd%2C+R+E%3BBiener%2C+J%3BLazicki%2C+A+E%3BHamza%2C+A+V%3BWang%2C+J%3BBraun%2C+T%3BBenedict%2C+L+X%3BCelliers%2C+P+M%3BCollins%2C+G+W&rft.aulast=Smith&rft.aufirst=R&rft.date=2014-07-17&rft.volume=511&rft.issue=7509&rft.spage=330&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature13526 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 - 49 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-03-05 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - compression; diamond; equations of state; experimental studies; extrasolar planets; giant planets; high pressure; laboratory studies; models; native elements; planetary interiors; planets; pressure; size; terrestrial comparison DO - http://dx.doi.org/10.1038/nature13526 ER - TY - JOUR T1 - Effect of residual oil saturation on hydrodynamic properties of porous media AN - 1553089937; 2014-062329 AB - To understand the effect of residual oil on hydraulic properties and solute dispersive behavior of porous media, miscible displacement column experiments were conducted using two petroleum products (diesel and engine oil) and a sandy soil. The effective water permeability, effective water-filled porosity, and dispersivity were investigated in two-fluid systems of water and oil as a function of residual oil saturation (ROS). At the end of each experiment, the distribution of ending ROS along the sand column was determined by the method of petroleum ether extraction-ultraviolet spectrophotometry. Darcy's Law was used to determine permeability, while breakthrough curves (BTCs) of a tracer, Cl (super -) , were used to calibrate effective porosity and dispersivity. The experimental results indicate that the maximum saturated zone residual saturation of diesel and engine oil in this study are 16.0% and 45.7%, respectively. Cl (super -) is found to have no sorption on the solid matrix. Generated BTCs are sigmoid in shape with no evidence of tailing. The effective porosity of sand is inversely proportional to ROS. For the same level of ROS, the magnitude of reduction in effective porosity by diesel is close to that by engine oil. The relative permeability of sand to water saturation decreases with increasing amount of trapped oil, and the slope of the relative permeability-saturation curve for water is larger at higher water saturations, indicating that oil first occupies larger pores, which have the most contribution to the conductivity of the water. In addition, the reduction rate of relative permeability by diesel is greater than that by engine oil. The dispersivity increases with increasing ROS, suggesting that the blockage of pore spaces by immobile oil globules may enhance local velocity variations and increase the tortuosity of aqueous-phase flow paths. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Hydrology AU - Zhang, Junjie AU - Zheng, Xilai AU - Chen, Lei AU - Sun, Yunwei Y1 - 2014/07/16/ PY - 2014 DA - 2014 Jul 16 SP - 281 EP - 291 PB - Elsevier, Amsterdam VL - 515 SN - 0022-1694, 0022-1694 KW - sorption KW - dispersivity KW - Far East KW - fluid phase KW - aqueous solutions KW - reservoir rocks KW - ground water KW - saturated zone KW - movement KW - sediments KW - ultraviolet spectra KW - spectra KW - Shandong China KW - Asia KW - Zihe River basin KW - water pollution KW - China KW - sand KW - experimental studies KW - clastic sediments KW - pollutants KW - Darcy's law KW - tortuosity KW - pollution KW - porous materials KW - properties KW - petroleum products KW - hydrochemistry KW - porosity KW - saturation KW - residual oil saturation KW - mathematical methods KW - reservoir properties KW - mobilization KW - permeability KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553089937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Effect+of+residual+oil+saturation+on+hydrodynamic+properties+of+porous+media&rft.au=Zhang%2C+Junjie%3BZheng%2C+Xilai%3BChen%2C+Lei%3BSun%2C+Yunwei&rft.aulast=Zhang&rft.aufirst=Junjie&rft.date=2014-07-16&rft.volume=515&rft.issue=&rft.spage=281&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2014.04.067 L2 - http://www.sciencedirect.com/science/journal/00221694 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 - Document feature - illus. incl. 7 tables N1 - Last updated - 2014-08-14 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - aqueous solutions; Asia; China; clastic sediments; Darcy's law; dispersivity; experimental studies; Far East; fluid phase; ground water; hydrochemistry; mathematical methods; mobilization; movement; permeability; petroleum products; pollutants; pollution; porosity; porous materials; properties; reservoir properties; reservoir rocks; residual oil saturation; sand; saturated zone; saturation; sediments; Shandong China; sorption; spectra; tortuosity; ultraviolet spectra; water pollution; Zihe River basin DO - http://dx.doi.org/10.1016/j.jhydrol.2014.04.067 ER - TY - JOUR T1 - Results from the 2013 Pan-American Advanced Studies Institute in Santo Domingo, Dominican Republic; joint modeling of complementary data functionals for seismic site characterization AN - 1861089489; 768459-141 JF - Earth Sciences Research Journal AU - Pulliman, Jay AU - Schwed, M AU - Sen, M K AU - Willemann, R J AU - Huerta-Lopez, C AU - Moschetti, M P AU - Schmitz, M AU - Louie, J N AU - Polanco, E AU - Huerfano Moreno, V AU - Pasyanos, M AU - ? Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 216 EP - 217 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/1861089489?accountid=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=Results+from+the+2013+Pan-American+Advanced+Studies+Institute+in+Santo+Domingo%2C+Dominican+Republic%3B+joint+modeling+of+complementary+data+functionals+for+seismic+site+characterization&rft.au=Pulliman%2C+Jay%3BSchwed%2C+M%3BSen%2C+M+K%3BWillemann%2C+R+J%3BHuerta-Lopez%2C+C%3BMoschetti%2C+M+P%3BSchmitz%2C+M%3BLouie%2C+J+N%3BPolanco%2C+E%3BHuerfano+Moreno%2C+V%3BPasyanos%2C+M%3B%3F&rft.aulast=Pulliman&rft.aufirst=Jay&rft.date=2014-07-01&rft.volume=18%2C+SPECIAL+ISSUE&rft.issue=&rft.spage=216&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 - Alternatives for computing regional and global seismic-phase travel times using a 3-dimensional model AN - 1861089426; 768459-75 JF - Earth Sciences Research Journal AU - Myers, Stephen C AU - Simmons, Nathan A AU - Matzel, Eric M AU - Johannesson, Gardar AU - ? Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 128 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/1861089426?accountid=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=Alternatives+for+computing+regional+and+global+seismic-phase+travel+times+using+a+3-dimensional+model&rft.au=Myers%2C+Stephen+C%3BSimmons%2C+Nathan+A%3BMatzel%2C+Eric+M%3BJohannesson%2C+Gardar%3B%3F&rft.aulast=Myers&rft.aufirst=Stephen&rft.date=2014-07-01&rft.volume=18%2C+SPECIAL+ISSUE&rft.issue=&rft.spage=128&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 - Microbial Profiling of Combat Wound Infection through Detection Microarray and Next-Generation Sequencing AN - 1694967682; 20296485 AB - Combat wound healing and resolution are highly affected by the resident microbial flora. We therefore sought to achieve comprehensive detection of microbial populations in wounds using novel genomic technologies and bioinformatics analyses. We employed a microarray capable of detecting all sequenced pathogens for interrogation of 124 wound samples from extremity injuries in combat-injured U.S. service members. A subset of samples was also processed via next-generation sequencing and metagenomic analysis. Array analysis detected microbial targets in 51% of all wound samples, with Acinetobacter baumannii being the most frequently detected species. Multiple Pseudomonas species were also detected in tissue biopsy specimens. Detection of the Acinetobacter plasmid pRAY correlated significantly with wound failure, while detection of enteric-associated bacteria was associated significantly with successful healing. Whole-genome sequencing revealed broad microbial biodiversity between samples. The total wound bioburden did not associate significantly with wound outcome, although temporal shifts were observed over the course of treatment. Given that standard microbiological methods do not detect the full range of microbes in each wound, these data emphasize the importance of supplementation with molecular techniques for thorough characterization of wound-associated microbes. Future application of genomic protocols for assessing microbial content could allow application of specialized care through early and rapid identification and management of critical patterns in wound bioburden. JF - Journal of Clinical Microbiology AU - Be, Nicholas A AU - Allen, Jonathan E AU - Brown, Trevor S AU - Gardner, Shea N AU - McLoughlin, Kevin S AU - Forsberg, Jonathan A AU - Kirkup, Benjamin C AU - Chromy, Brett A AU - Luciw, Paul A AU - Elster, Eric A AD - Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA, jaing2@llnl.gov. Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 2583 EP - 2594 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 United States VL - 52 IS - 7 SN - 0095-1137, 0095-1137 KW - Microbiology Abstracts A: Industrial & Applied Microbiology KW - Data processing KW - Injuries KW - Wound healing KW - Biodiversity KW - Pseudomonas KW - Biopsy KW - Pathogens KW - Plasmids KW - Supplementation KW - Acinetobacter KW - Acinetobacter baumannii KW - Wound infection KW - genomics KW - Bioinformatics KW - A 01300:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1694967682?accountid=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=Journal+of+Clinical+Microbiology&rft.atitle=Microbial+Profiling+of+Combat+Wound+Infection+through+Detection+Microarray+and+Next-Generation+Sequencing&rft.au=Be%2C+Nicholas+A%3BAllen%2C+Jonathan+E%3BBrown%2C+Trevor+S%3BGardner%2C+Shea+N%3BMcLoughlin%2C+Kevin+S%3BForsberg%2C+Jonathan+A%3BKirkup%2C+Benjamin+C%3BChromy%2C+Brett+A%3BLuciw%2C+Paul+A%3BElster%2C+Eric+A&rft.aulast=Be&rft.aufirst=Nicholas&rft.date=2014-07-01&rft.volume=52&rft.issue=7&rft.spage=2583&rft.isbn=&rft.btitle=&rft.title=Journal+of+Clinical+Microbiology&rft.issn=00951137&rft_id=info:doi/10.1128%2FJCM.00556-14 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Number of references - 42 N1 - Last updated - 2016-07-20 N1 - SubjectsTermNotLitGenreText - Data processing; Injuries; Wound infection; Biodiversity; Wound healing; Biopsy; Bioinformatics; Pathogens; genomics; Plasmids; Supplementation; Acinetobacter baumannii; Acinetobacter; Pseudomonas DO - http://dx.doi.org/10.1128/JCM.00556-14 ER - TY - JOUR T1 - Unraveling rift margin evolution and escarpment development ages along the Dead Sea Fault using cosmogenic burial ages AN - 1612265859; 2014-081259 AB - The Dead Sea fault (DSF) is one of the most active plate boundaries in the world. Understanding the Quaternary history and sediments of the DSF requires investigation into the Neogene development of this plate boundary. DSF lateral motion preceded significant extension and rift morphology by approximately 10 Ma. Sediments of the Sedom Formation, dated here between 5.0 + or - 0.5 Ma and 6.2 (sub - 2.1) (super +inf) Ma, yielded extremely low (super 10) Be concentrations and (super 26) Al is absent. These reflect the antiquity of the sediments, deposited in the Sedom Lagoon, which evolved in a subdued landscape and was connected to the Mediterranean Sea. The base of the overlying Amora Formation, deposited in the terminal Amora Lake which developed under increasing relief that promoted escarpment incision, was dated at 3.3 (sub - 0.8) (super + 0.9) Ma. Burial ages of fluvial sediments within caves (3.4 + or - 0.2 Ma and 3.6 + or - 0.4 Ma) represent the timing of initial incision. Initial DSF topography coincides with the earliest Red Sea MORB's and the East Anatolian fault initiation. These suggest a change in the relative Arabian-African plate motion. This change introduced the rifting component to the DSF followed by a significant subsidence, margin uplift, and a reorganization of relief and drainage pattern in the region resulting in the topographic framework observed today. Abstract Copyright (2014) Elsevier, B.V. JF - Quaternary Research AU - Matmon, A AU - Fink, D AU - Davis, M AU - Niedermann, S AU - Rood, D AU - Frumkin, A Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 281 EP - 295 PB - Elsevier, New York, NY VL - 82 IS - 1 SN - 0033-5894, 0033-5894 KW - isotopes KW - rifting KW - burial KW - Cenozoic KW - Al-26 KW - sedimentary rocks KW - radioactive isotopes KW - neotectonics KW - aluminum KW - sediments KW - absolute age KW - tectonics KW - Asia KW - Middle East KW - faults KW - Sedom Formation KW - alkaline earth metals KW - Dead Sea Fault KW - Be-10 KW - plate boundaries KW - Dead Sea Rift KW - Amora Formation KW - Tertiary KW - plate tectonics KW - metals KW - Dead Sea KW - beryllium KW - 03:Geochronology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612265859?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Research&rft.atitle=Unraveling+rift+margin+evolution+and+escarpment+development+ages+along+the+Dead+Sea+Fault+using+cosmogenic+burial+ages&rft.au=Matmon%2C+A%3BFink%2C+D%3BDavis%2C+M%3BNiedermann%2C+S%3BRood%2C+D%3BFrumkin%2C+A&rft.aulast=Matmon&rft.aufirst=A&rft.date=2014-07-01&rft.volume=82&rft.issue=1&rft.spage=281&rft.isbn=&rft.btitle=&rft.title=Quaternary+Research&rft.issn=00335894&rft_id=info:doi/10.1016%2Fj.yqres.2014.04.008 L2 - http://www.sciencedirect.com/science/journal/00335894 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 - 118 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2014-10-16 N1 - CODEN - QRESAV N1 - SubjectsTermNotLitGenreText - absolute age; Al-26; alkaline earth metals; aluminum; Amora Formation; Asia; Be-10; beryllium; burial; Cenozoic; Dead Sea; Dead Sea Fault; Dead Sea Rift; faults; isotopes; metals; Middle East; neotectonics; plate boundaries; plate tectonics; radioactive isotopes; rifting; sedimentary rocks; sediments; Sedom Formation; tectonics; Tertiary DO - http://dx.doi.org/10.1016/j.yqres.2014.04.008 ER - TY - JOUR T1 - Anisotropic damage of rock joints during cyclic loading: constitutive framework and numerical integration AN - 1551107700; 20139088 AB - This work describes a constitutive framework for modeling the behavior of rough joints under cyclic loading. Particular attention is paid to the intrinsic links between dilatancy, surface degradation, and mobilized shear strength. The framework also accounts for the important effect of shear-induced anisotropy. The resulting approach is fully three-dimensional and is not restricted to plane-displacement kinematics. Both the governing formulation and an algorithm for implicit numerical integration are presented. While the proposed methods are general, we also postulate a specific model that is compared with experimental data. It employs relatively few free parameters but shows good agreement with laboratory tests. Copyright copyright 2013 John Wiley & Sons, Ltd. JF - International Journal for Numerical and Analytical Methods in Geomechanics AU - White, Joshua A AD - Atmospheric, Earth, and Energy Division, Lawrence Livermore National Laboratory, Livermore, CA, U.S.A. Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 1036 EP - 1057 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 38 IS - 10 SN - 0363-9061, 0363-9061 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Experimental Data KW - Damage KW - Anisotropy KW - Mathematical models KW - Laboratories KW - Algorithms KW - Cyclic loading KW - Model Studies KW - Shear strength KW - Rocks KW - Behavior KW - Analytical Methods KW - Tests KW - SW 5010:Network design KW - Q2 09262:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1551107700?accountid=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=International+Journal+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.atitle=Anisotropic+damage+of+rock+joints+during+cyclic+loading%3A+constitutive+framework+and+numerical+integration&rft.au=White%2C+Joshua+A&rft.aulast=White&rft.aufirst=Joshua&rft.date=2014-07-01&rft.volume=38&rft.issue=10&rft.spage=1036&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.issn=03639061&rft_id=info:doi/10.1002%2Fnag.2247 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Shear strength; Mathematical models; Anisotropy; Tests; Cyclic loading; Damage; Experimental Data; Behavior; Rocks; Analytical Methods; Laboratories; Algorithms; Model Studies DO - http://dx.doi.org/10.1002/nag.2247 ER - TY - JOUR T1 - 14C Analysis of protein extracts from Bacillus spores AN - 1551084225; 20048175 AB - Investigators of bioagent incidents or interdicted materials need validated, independent analytical methods that will allow them to distinguish between recently made bioagent samples versus material drawn from the archives of a historical program. Heterotrophic bacteria convert the carbon in their food sources, growth substrate or culture media, into the biomolecules they need. The F14C (fraction modern radiocarbon) of a variety of media, spores, and separated proteins from spores was measured by accelerator mass spectrometry (AMS). AMS precisely measures F14C values of biological materials and has been used to date the synthesis of biomaterials over the bomb pulse era (1955 to present). The F14C of spores reflects the radiocarbon content of the media in which they were grown. In a survey of commercial media we found that the F14C value indicated that carbon sources for the media were alive within about a year of the date of manufacture and generally of terrestrial origin. Hence, bacteria and their products can be dated using their 14C signature. spore samples were generated onsite with defined media and carbon free purification and also obtained from archived material. Using mechanical lysis and a variety of washes with carbon free acids and bases, contaminant carbon was removed from soluble proteins to enable accurate 14C bomb-pulse dating. Since media is contemporary, 14C bomb-pulse dating of isolated soluble proteins can be used to distinguish between historical archives of bioagents and those produced from recent media. JF - Forensic Science International AU - Cappuccio, Jenny A AU - Falso, Miranda JSarachine AU - Kashgarian, Michaele AU - Buchholz, Bruce A AD - Biosciences & Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, CA 94551, United States Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 54 EP - 60 PB - Elsevier B.V., P.O. Box 85 Limerick Ireland VL - 240 SN - 0379-0738, 0379-0738 KW - Microbiology Abstracts B: Bacteriology KW - Accelerator mass spectrometry KW - Spore KW - 14C bomb-pulse dating KW - Isotope forensics KW - Dating KW - Food sources KW - Biomaterials KW - Heterotrophic bacteria KW - Carbon sources KW - Spores KW - Contaminants KW - Bacillus KW - Media (culture) KW - Mass spectroscopy KW - J 02320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1551084225?accountid=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=Forensic+Science+International&rft.atitle=14C+Analysis+of+protein+extracts+from+Bacillus+spores&rft.au=Cappuccio%2C+Jenny+A%3BFalso%2C+Miranda+JSarachine%3BKashgarian%2C+Michaele%3BBuchholz%2C+Bruce+A&rft.aulast=Cappuccio&rft.aufirst=Jenny&rft.date=2014-07-01&rft.volume=240&rft.issue=&rft.spage=54&rft.isbn=&rft.btitle=&rft.title=Forensic+Science+International&rft.issn=03790738&rft_id=info:doi/10.1016%2Fj.forsciint.2014.04.003 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-04-13 N1 - SubjectsTermNotLitGenreText - Food sources; Dating; Biomaterials; Heterotrophic bacteria; Carbon sources; Contaminants; Spores; Mass spectroscopy; Media (culture); Bacillus DO - http://dx.doi.org/10.1016/j.forsciint.2014.04.003 ER - TY - JOUR T1 - 2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) is selectively toxic to primary dopaminergic neurons in vitro. AN - 1541383072; 24718704 AB - Parkinson's disease (PD) is the second most common neurodegenerative disease. Much data has linked the etiology of PD to a variety of environmental factors. The majority of cases are thought to arise from a combination of genetic susceptibility and environmental factors. Chronic exposures to dietary factors, including meat, have been identified as potential risk factors. Although heterocyclic amines that are produced during high-temperature meat cooking are known to be carcinogenic, their effect on the nervous system has yet to be studied in depth. In this study, we investigated neurotoxic effects of 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), a highly abundant heterocyclic amine in cooked meat, in vitro. We tested toxicity of PhIP and the two major phase I metabolites, N-OH-PhIP and 4'-OH-PhIP, using primary mesencephalic cultures from rat embryos. This culture system contains both dopaminergic and nondopaminergic neurons, which allows specificity of neurotoxicity to be readily examined. We find that exposure to PhIP or N-OH-PhIP is selectively toxic to dopaminergic neurons in primary cultures, resulting in a decreased percentage of dopaminergic neurons. Neurite length is decreased in surviving dopaminergic neurons. Exposure to 4'-OH-PhIP did not produce significant neurotoxicity. PhIP treatment also increased formation of oxidative damage markers, 4-hydroxy-2-nonenal (HNE) and 3-nitrotyrosine in dopaminergic neurons. Pretreatment with N-acetylcysteine was protective. Finally, treatment with blueberry extract, a dietary factor with known antioxidant and other protective mechanisms, prevented PhIP-induced toxicity. Collectively, our study suggests, for the first time, that PhIP is selectively toxic to dopaminergic neurons likely through inducing oxidative stress. JF - Toxicological sciences : an official journal of the Society of Toxicology AU - Griggs, Amy M AU - Agim, Zeynep S AU - Mishra, Vartika R AU - Tambe, Mitali A AU - Director-Myska, Alison E AU - Turteltaub, Kenneth W AU - McCabe, George P AU - Rochet, Jean-Christophe AU - Cannon, Jason R AD - School of Health Sciences, Purdue University, West Lafayette, Indiana 47907 Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana 47907 Cook MED Institute, West Lafayette, Indiana 47906. ; School of Health Sciences, Purdue University, West Lafayette, Indiana 47907. ; Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana 47907. ; Chemical/Biological Technologies, Defense Threat Reduction Agency, Fort Belvoir, Virginia 22060. ; Biosciences & Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, California 94551. ; Department of Statistics, Purdue University, West Lafayette, Indiana 47907. ; School of Health Sciences, Purdue University, West Lafayette, Indiana 47907 cannonjr@purdue.edu. Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 179 EP - 189 VL - 140 IS - 1 KW - Antioxidants KW - 0 KW - Dopamine Plasma Membrane Transport Proteins KW - Imidazoles KW - Plant Extracts KW - 2-amino-1-methyl-6-phenylimidazo(4,5-b)pyridine KW - 909C6UN66T KW - Index Medicus KW - Parkinson's disease KW - neurotoxicity KW - PhIP KW - heterocyclic amines KW - Animals KW - Neurotoxicity Syndromes -- etiology KW - Antioxidants -- isolation & purification KW - Plant Extracts -- isolation & purification KW - Primary Cell Culture KW - Mesencephalon -- cytology KW - Mesencephalon -- metabolism KW - Plant Extracts -- pharmacology KW - Rats, Sprague-Dawley KW - Antioxidants -- pharmacology KW - Cell Survival -- drug effects KW - Neurites -- drug effects KW - Neurotoxicity Syndromes -- prevention & control KW - Binding, Competitive KW - Oxidative Stress -- drug effects KW - Blueberry Plants -- chemistry KW - Dopamine Plasma Membrane Transport Proteins -- metabolism KW - Neurites -- pathology KW - Neurotoxicity Syndromes -- metabolism KW - Mesencephalon -- embryology KW - Neurotoxicity Syndromes -- pathology KW - Imidazoles -- toxicity KW - Dopaminergic Neurons -- drug effects KW - Imidazoles -- metabolism KW - Dopaminergic Neurons -- metabolism KW - Dopaminergic Neurons -- pathology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1541383072?accountid=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=Toxicological+sciences+%3A+an+official+journal+of+the+Society+of+Toxicology&rft.atitle=2-Amino-1-methyl-6-phenylimidazo%5B4%2C5-b%5Dpyridine+%28PhIP%29+is+selectively+toxic+to+primary+dopaminergic+neurons+in+vitro.&rft.au=Griggs%2C+Amy+M%3BAgim%2C+Zeynep+S%3BMishra%2C+Vartika+R%3BTambe%2C+Mitali+A%3BDirector-Myska%2C+Alison+E%3BTurteltaub%2C+Kenneth+W%3BMcCabe%2C+George+P%3BRochet%2C+Jean-Christophe%3BCannon%2C+Jason+R&rft.aulast=Griggs&rft.aufirst=Amy&rft.date=2014-07-01&rft.volume=140&rft.issue=1&rft.spage=179&rft.isbn=&rft.btitle=&rft.title=Toxicological+sciences+%3A+an+official+journal+of+the+Society+of+Toxicology&rft.issn=1096-0929&rft_id=info:doi/10.1093%2Ftoxsci%2Fkfu060 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-02-19 N1 - Date created - 2014-06-26 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: J Neural Transm Suppl. 1994;41:327-33 [7931246] Mov Disord. 1998;13 Suppl 1:13-6 [9613713] Carcinogenesis. 1999 Apr;20(4):705-13 [10223203] J Neurosci. 1999 Sep 15;19(18):8114-21 [10479711] Cancer Lett. 1999 Sep 1;143(2):149-55 [10503895] Exp Neurol. 2005 May;193(1):75-84 [15817266] Science. 2006 Jul 21;313(5785):324-8 [16794039] Neurology. 2007 Jan 30;68(5):384-6 [17082464] Chem Res Toxicol. 2007 Mar;20(3):531-42 [17279779] J Org Chem. 2007 Jun 22;72(13):4698-706 [17542636] Neurotoxicology. 2008 Mar;29(2):294-300 [18242711] Am J Clin Nutr. 2009 May;89(5):1602S-1606S [19339395] Neurobiol Dis. 2009 May;34(2):279-90 [19385059] J Neurochem. 2008 Jun 1;105(6):2435-53 [18331584] J Chromatogr B Analyt Technol Biomed Life Sci. 2010 Sep 1;878(25):2353-62 [20708442] Prog Brain Res. 2010;184:17-33 [20887868] Endocrinology. 2010 Dec;151(12):5570-81 [21047943] Annu Rev Pathol. 2011;6:193-222 [21034221] Neurotoxicology. 2011 Mar;32(2):227-32 [21145352] Antioxid Redox Signal. 2011 Aug 15;15(4):855-71 [21395478] J Nutr. 2011 Oct;141(10):1805-12 [21880954] Toxicol Sci. 2011 Dec;124(2):225-50 [21914720] Neuroscience. 2011 Dec 15;198:221-31 [21884755] Pharmacol Biochem Behav. 2012 Feb;100(4):801-10 [21536062] Neurology. 2012 Mar 13;78(11):781-6 [22323743] Neurology. 2012 Apr 10;78(15):1138-45 [22491871] Int J Immunopathol Pharmacol. 2012 Jul-Sep;25(3):573-81 [23058007] Chem Res Toxicol. 2012 Oct 15;25(10):2179-93 [22827630] Exp Neurol. 2013 Feb;240:44-56 [23153578] Biochim Biophys Acta. 2013 Aug;1830(8):4117-29 [23618697] Neurobiol Dis. 2013 Sep;57:38-46 [22776331] Nutr Rev. 2013 Aug;71(8):511-27 [23865797] Neurotoxicology. 2014 Jan;40:52-6 [24300779] Neurobiol Aging. 2014 May;35(5):1162-76 [24315037] Brain Res. 2014 Mar 25;1555:60-77 [24502982] Mech Ageing Dev. 1999 Nov;111(2-3):141-54 [10656533] J Agric Food Chem. 1999 Jun;47(6):2274-9 [10794622] Nutrition. 2000 Sep;16(9):767-73 [11032452] Neurobiol Aging. 2002 Mar-Apr;23(2):245-54 [11804710] Am J Epidemiol. 2003 Jun 1;157(11):1007-14 [12777364] Nutr Neurosci. 2003 Jun;6(3):153-62 [12793519] Cell Tissue Res. 2004 Oct;318(1):121-34 [15338272] Carcinogenesis. 1984 Jan;5(1):95-102 [6690092] Carcinogenesis. 1986 Jul;7(7):1081-6 [3719903] Environ Health Perspect. 1986 Aug;67:17-24 [3757953] Biochem Pharmacol. 1988 Sep 1;37(17):3289-95 [2900009] Carcinogenesis. 1989 Aug;10(8):1389-96 [2665964] Neurosci Lett. 1990 Aug 24;116(3):372-8 [2243617] J Neurochem. 1994 Sep;63(3):1126-32 [8051554] Erratum In: Toxicol Sci. 2014 Oct;141(2):560 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1093/toxsci/kfu060 ER - TY - JOUR T1 - Geomechanical behavior of the reservoir and caprock system at the Salah CO (sub 2) storage project AN - 1832662080; 720308-2 AB - Almost 4 million metric tons of CO2 were injected at the In Salah CO2 storage site between 2004 and 2011. Storage integrity at the site is provided by a 950-m-thick caprock that sits above the injection interval. This caprock consists of a number of low-permeability units that work together to limit vertical fluid migration. These are grouped into main caprock units, providing the primary seal, and lower caprock units, providing an additional buffer and some secondary storage capacity. Monitoring observations at the site indirectly suggest that pressure, and probably CO2, have migrated upward into the lower portion of the caprock. Although there are no indications that the overall storage integrity has been compromised, these observations raise interesting questions about the geomechanical behavior of the system. Several hypotheses have been put forward to explain the measured pressure, seismic, and surface deformation behavior. These include fault leakage, flow through preexisting fractures, and the possibility that injection pressures induced hydraulic fractures. This work evaluates these hypotheses in light of the available data. We suggest that the simplest and most likely explanation for the observations is that a portion of the lower caprock was hydrofractured, although interaction with preexisting fractures may have played a significant role. There are no indications, however, that the overall storage complex has been compromised, and several independent data sets demonstrate that CO2 is contained in the confinement zone. JF - Proceedings of the National Academy of Sciences of the United States of America AU - White, Joshua A AU - Chiaramonte, Laura AU - Ezzedine, Souheil AU - Foxall, William AU - Hao, Yue AU - ramirez, Abelardo AU - McNab, Walt Y1 - 2014/06/17/ PY - 2014 DA - 2014 Jun 17 SP - 8747 EP - 8752 PB - National Academy of Sciences, Washington, DC VL - 111 IS - 24 SN - 0027-8424, 0027-8424 KW - geophysical surveys KW - North Africa KW - seismic anomalies KW - mechanism KW - reservoir rocks KW - carbon dioxide KW - seismicity KW - SAR KW - mechanics KW - hydraulic fracturing KW - monitoring KW - carbon sequestration KW - pressure KW - central Algeria KW - radar methods KW - deformation KW - caprock KW - gas injection KW - Krechba Field KW - surveys KW - Africa KW - reservoir properties KW - InSAR KW - In Salah Project KW - Algeria KW - storage KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832662080?accountid=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=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.atitle=Geomechanical+behavior+of+the+reservoir+and+caprock+system+at+the+Salah+CO+%28sub+2%29+storage+project&rft.au=White%2C+Joshua+A%3BChiaramonte%2C+Laura%3BEzzedine%2C+Souheil%3BFoxall%2C+William%3BHao%2C+Yue%3Bramirez%2C+Abelardo%3BMcNab%2C+Walt&rft.aulast=White&rft.aufirst=Joshua&rft.date=2014-06-17&rft.volume=111&rft.issue=24&rft.spage=8747&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.issn=00278424&rft_id=info:doi/10.1073%2Fpnas.1316465111 L2 - http://www.pnas.org/content/by/year 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 - 25 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - Africa; Algeria; caprock; carbon dioxide; carbon sequestration; central Algeria; deformation; gas injection; geophysical surveys; hydraulic fracturing; In Salah Project; InSAR; Krechba Field; mechanics; mechanism; monitoring; North Africa; pressure; radar methods; reservoir properties; reservoir rocks; SAR; seismic anomalies; seismicity; storage; surveys DO - http://dx.doi.org/10.1073/pnas.1316465111 ER - TY - JOUR T1 - A Deg-protease family protein in marine Synechococcus is involved in outer membrane protein organization AN - 1635018263; 21099488 AB - Deg-family proteases are a periplasm-associated group of proteins that are known to be involved in envelope stress responses and are found in most microorganisms. Orthologous genes SYNW2176 (in strain WH8102) and sync_2523 (strain CC9311) are predicted members of the Deg-protease family and are among the few genes induced by copper stress in both open ocean and coastal marine Synechococcus strains. In contrast to the lack of a phenotype in a similar knockout in Synechocystis PCC6803, a SYNW2176 knockout mutant in strain WH8102 was much more resistant to copper than the wild-type. The mutant also exhibited a significantly altered outer membrane protein composition which may contribute to copper resistance, longer lag phase after transfer, low-level consistent alkaline phosphatase activity, and an inability to induce high alkaline phosphatase activity in response to phosphate stress. This phenotype suggests a protein-quality-control role for SYNW2176, the absence of which leads to a constitutively activated stress response. Deg-protease family proteins in this ecologically important cyanobacterial group thus help to determine outer membrane responses to both nutrients and toxins. JF - Frontiers in Marine Science AU - Stuart, Rhona K AU - Brahamsha, Bianca AU - Palenik, Brian AD - Scripps Institution of Oceanography, University of California at San Diego, La Jolla, CA, USA; Lawrence Livermore National Laboratory, Livermore, USA, bpalenik@ucsd.edu Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1 EP - 12 PB - Frontiers Research Foundation, P O Box 110 1015 Lausanne Switzerland VL - 1 KW - Microbiology Abstracts C: Algology, Mycology & Protozoology; Oceanic Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 1: Biological Sciences & Living Resources KW - marine Synechococcus KW - copper KW - Deg protease KW - envelope stress KW - phosphate stress KW - Synechocystis KW - Lag phase KW - outer membrane proteins KW - Toxicants KW - Synechococcus KW - Stress KW - Phytoplankton KW - Nutrients KW - Copper KW - Phenotypes KW - Toxins KW - Alkaline phosphatase KW - Envelopes KW - Phosphate KW - Oceans KW - Microorganisms KW - Proteins KW - Proteinase KW - Phosphatase KW - O 1070:Ecology/Community Studies KW - Q1 08482:Ecosystems and energetics KW - Q5 08502:Methods and instruments KW - K 03320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1635018263?accountid=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=Frontiers+in+Marine+Science&rft.atitle=A+Deg-protease+family+protein+in+marine+Synechococcus+is+involved+in+outer+membrane+protein+organization&rft.au=Stuart%2C+Rhona+K%3BBrahamsha%2C+Bianca%3BPalenik%2C+Brian&rft.aulast=Stuart&rft.aufirst=Rhona&rft.date=2014-06-01&rft.volume=1&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Frontiers+in+Marine+Science&rft.issn=2296-7745&rft_id=info:doi/10.3389%2Ffmars.2014.00016 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2016-10-26 N1 - SubjectsTermNotLitGenreText - Toxicants; Microorganisms; Proteins; Phytoplankton; Phenotypes; Phosphatase; Lag phase; Envelopes; Alkaline phosphatase; outer membrane proteins; Phosphate; Oceans; Stress; Nutrients; Proteinase; Copper; Toxins; Synechocystis; Synechococcus DO - http://dx.doi.org/10.3389/fmars.2014.00016 ER - TY - JOUR T1 - Quantifying components of aerosol-cloud-radiation interactions in climate models AN - 1560105308; 20554468 AB - The interaction of anthropogenic aerosols with radiation and clouds is the largest source of uncertainty in the radiative forcing of the climate during the industrial period. Here we apply novel techniques to diagnose the contributors to the shortwave (SW) effective radiative forcing (ERF) from aerosol-radiation-interaction (ERFari) and from aerosol cloud interaction (ERFaci) in experiments performed in phase 5 of the Coupled Model Intercomparison Project. We find that the ensemble mean SW ERFari+aci of -1.40 plus or minus 0.56 W m super(-2) comes roughly 25% from ERFari (-0.35 plus or minus 0.20 W m super(-2)) and 75% from ERFaci (-1.04 plus or minus 0.67 W m super(-2)). ERFari is made up of -0.62 plus or minus 0.30 W m super(-2) due to aerosol scattering opposed by +0.26 plus or minus 0.12 W m super(-2) due to aerosol absorption and is largest near emission sources. The ERFari from nonsulfate aerosols is +0.13 plus or minus 0.09 W m super(-2), consisting of -0.15 plus or minus 0.11 W m super(-2) of scattering and +0.29 plus or minus 0.15 W m super(-2) of absorption. The change in clear-sky flux is a negatively biased measure of ERFari, as the presence of clouds reduces the magnitude and intermodel spread of ERFari by 40-50%. ERFaci, which is large both near and downwind of emission sources, is composed of -0.99 plus or minus 0.54 W m super(-2) from enhanced cloud scattering, with much smaller contributions from increased cloud amount and absorption. In models that allow aerosols to affect ice clouds, large increases in the optical depth of high clouds cause substantial longwave and shortwave radiative anomalies. Intermodel spread in ERFaci is dominated by differences in how aerosols increase cloud scattering, but even if all models agreed on this effect, over a fifth of the spread in ERFaci would remain due solely to differences in total cloud amount. Key Points * We compute effective forcings from aerosol-cloud-radiation interactions in GCMs * Total aerosol forcing is 25% direct effect and 75% indirect effect * Indirect effect comes mostly from enhanced cloud scattering JF - Journal of Geophysical Research: Atmospheres AU - Zelinka, Mark D AU - Andrews, Timothy AU - Forster, Piers M AU - Taylor, Karl E AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 7599 EP - 7615 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 12 SN - 2169-897X, 2169-897X KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Scattering KW - Aerosols KW - Radiative forcing KW - Flux KW - Climate KW - Emission KW - Spreads KW - Pollution sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560105308?accountid=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=Quantifying+components+of+aerosol-cloud-radiation+interactions+in+climate+models&rft.au=Zelinka%2C+Mark+D%3BAndrews%2C+Timothy%3BForster%2C+Piers+M%3BTaylor%2C+Karl+E&rft.aulast=Zelinka&rft.aufirst=Mark&rft.date=2014-06-01&rft.volume=119&rft.issue=12&rft.spage=7599&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2014JD021710 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1002/2014JD021710 ER - TY - JOUR T1 - Expanded glaciers during a dry and cold last glacial maximum in equatorial East Africa AN - 1549618448; 2014-060335 AB - Glaciers on the world's highest tropical mountains are among the most sensitive components of the cryosphere, yet the climatic controls that influence their fluctuations are not fully understood. Here we present the first (super 10) Be ages of glacial moraines in Africa and use these to assess the climatic conditions that influenced past tropical glacial extents. We applied (super 10) Be surface exposure dating to determine the ages of quartz-rich boulders atop moraines in the Rwenzori Mountains ( approximately 1 degrees N, 30 degrees E), located on the border of Uganda and the Democratic Republic of Congo. The (super 10) Be ages document expanded glaciers ca. 23.4 and 20.1 ka, indicating that glaciers in equatorial East Africa advanced during the global Last Glacial Maximum (ca. 26-19.5 ka). A comparison of these moraine ages with regional paleoclimate records indicates that Rwenzori glaciers expanded contemporaneously with dry and cold conditions. Recession from the moraines occurred after ca. 20.1 ka, similar in timing to a rise in air temperature documented in East African lake records. Our results suggest that, on millennial time scales, past fluctuations of Rwenzori glaciers were strongly influenced by air temperature. JF - Geology (Boulder) AU - Kelly, Meredith A AU - Russell, James M AU - Baber, Margaret B AU - Howley, Jennifer A AU - Loomis, Shannon E AU - Zimmerman, Susan AU - Nakileza, Bob AU - Lukaye, Joshua Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 519 EP - 522 PB - Geological Society of America (GSA), Boulder, CO VL - 42 IS - 6 SN - 0091-7613, 0091-7613 KW - last glacial maximum KW - glaciation KW - isotopes KW - East Africa KW - paleoclimatology KW - exposure age KW - Rwenzori Mountains KW - Cenozoic KW - radioactive isotopes KW - paleotemperature KW - moraines KW - absolute age KW - alkaline earth metals KW - Quaternary KW - equatorial region KW - Be-10 KW - glaciers KW - Uganda KW - Central Africa KW - glacial features KW - Congo Democratic Republic KW - paleoenvironment KW - metals KW - upper Quaternary KW - Africa KW - reconstruction KW - beryllium KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549618448?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geology+%28Boulder%29&rft.atitle=Expanded+glaciers+during+a+dry+and+cold+last+glacial+maximum+in+equatorial+East+Africa&rft.au=Kelly%2C+Meredith+A%3BRussell%2C+James+M%3BBaber%2C+Margaret+B%3BHowley%2C+Jennifer+A%3BLoomis%2C+Shannon+E%3BZimmerman%2C+Susan%3BNakileza%2C+Bob%3BLukaye%2C+Joshua&rft.aulast=Kelly&rft.aufirst=Meredith&rft.date=2014-06-01&rft.volume=42&rft.issue=6&rft.spage=519&rft.isbn=&rft.btitle=&rft.title=Geology+%28Boulder%29&rft.issn=00917613&rft_id=info:doi/10.1130%2FG35421.1 L2 - http://www.gsajournals.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, 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 - 2014-01-01 N1 - Number of references - 29 N1 - PubXState - CO N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - GSA Data Repository item 2014184 N1 - Last updated - 2014-07-31 N1 - CODEN - GLGYBA N1 - SubjectsTermNotLitGenreText - absolute age; Africa; alkaline earth metals; Be-10; beryllium; Cenozoic; Central Africa; Congo Democratic Republic; East Africa; equatorial region; exposure age; glacial features; glaciation; glaciers; isotopes; last glacial maximum; metals; moraines; paleoclimatology; paleoenvironment; paleotemperature; Quaternary; radioactive isotopes; reconstruction; Rwenzori Mountains; Uganda; upper Quaternary DO - http://dx.doi.org/10.1130/G35421.1 ER - TY - JOUR T1 - Transmission electron microscope analyses of alteration phases in Martian meteorite MIL 090032 AN - 1545407598; 2014-055487 AB - The nakhlite group of martian meteorites found in the Antarctic contain varying abundances of both martian and terrestrial secondary alteration phases. The aim of this study was to use transmission electron microscopy (TEM) to compare martian and terrestrial alteration embodied within a single nakhlite martian meteorite find - MIL 090032. Martian alteration veins in MIL 090032 are composed of poorly ordered Fe-smectite phyllosilicate. This poorly-ordered smectite appears to be equivalent to the nanocrystalline phyllosilicate/hydrated amorphous gel phase previously described in the martian alteration veins of other nakhlites. Chemical differences in this nanocrystalline phyllosilicate between different nakhlites imply localised alteration, which occurred close to the martian surface in MIL 090032. Both structurally and compositionally the nakhlite nanocrystalline phyllosilicate shows similarities to the amorphous/poorly ordered phase recently discovered in martian soil by the Mars Curiosity Rover at Rocknest, Gale Crater. Terrestrially derived alteration phases in MIL 090032 include jarosite and gypsum, amorphous silicates, and Fe-oxides and hydroxides. Similarities between the mineralogy and chemistry of the MIL 090032 terrestrial and martian alteration phases suggest the alteration conditions on Mars were similar to those in the Antarctic. At both sites a small amount of fluid at low temperatures infiltrated the rock and became acidic as a result of the conversion of Fe (super 2+) to Fe (super 3+) under oxidising conditions. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Hallis, L J AU - Ishii, H A AU - Bradley, J P AU - Taylor, G J Y1 - 2014/06/01/ PY - 2014 DA - 2014 Jun 01 SP - 275 EP - 288 PB - Elsevier, New York, NY VL - 134 SN - 0016-7037, 0016-7037 KW - silicates KW - alteration KW - nakhlite KW - stony meteorites KW - Martian meteorites KW - electron probe data KW - SNC Meteorites KW - meteorites KW - mineral composition KW - major elements KW - oxides KW - spectra KW - chemical composition KW - Eh KW - Miller Range Meteorites KW - minor elements KW - sulfates KW - textures KW - smectite KW - MIL 090032 KW - veins KW - achondrites KW - X-ray spectra KW - TEM data KW - EDS spectra KW - clay minerals KW - jarosite KW - hydroxides KW - Antarctica KW - sheet silicates KW - nanoparticles KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545407598?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Transmission+electron+microscope+analyses+of+alteration+phases+in+Martian+meteorite+MIL+090032&rft.au=Hallis%2C+L+J%3BIshii%2C+H+A%3BBradley%2C+J+P%3BTaylor%2C+G+J&rft.aulast=Hallis&rft.aufirst=L&rft.date=2014-06-01&rft.volume=134&rft.issue=&rft.spage=275&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.02.007 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 - 78 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-07-17 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - achondrites; alteration; Antarctica; chemical composition; clay minerals; EDS spectra; Eh; electron probe data; hydroxides; jarosite; major elements; Martian meteorites; meteorites; MIL 090032; Miller Range Meteorites; mineral composition; minor elements; nakhlite; nanoparticles; oxides; sheet silicates; silicates; smectite; SNC Meteorites; spectra; stony meteorites; sulfates; TEM data; textures; veins; X-ray spectra DO - http://dx.doi.org/10.1016/j.gca.2014.02.007 ER - TY - JOUR T1 - m (sub b) :M (sub s) screening revisited for large events AN - 1542648226; 2014-051952 AB - Event screening of large-magnitude events (M (sub w) > or =5) based on m (sub b) :M (sub s) is revisited to account for the effect of the source corner frequency relative to the fixed frequencies of the long-period M (sub s) and short-period m (sub b) . For large events this source effect increases the slope of m (sub b) :M (sub s) relative to the 1:1 value expected for small events. The effect is demonstrated in the large earthquake m (sub b) :M (sub s) population and in the behavior of large theoretical explosions that are consistent with the more limited explosion population. The behavior is used to create a more conservative screening criterion that ensures large explosions are not inadvertently screened out by m (sub b) :M (sub s) , while not appreciably decreasing the number of screened earthquakes. This change also makes the variance of the earthquake and explosion populations more equal, which is of utility in statistical analysis. A slight trend in the explosion population and a case study of two large U.S. underground nuclear tests provide support for adopting a more conservative approach. JF - Bulletin of the Seismological Society of America AU - Ford, Sean R AU - Walter, William R Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1550 EP - 1555 PB - Seismological Society of America, Berkeley, CA VL - 104 IS - 3 SN - 0037-1106, 0037-1106 KW - United States KW - P-waves KW - body waves KW - explosions KW - Elko County Nevada KW - magnitude KW - elastic waves KW - case studies KW - HANDLEY test KW - Elko Nevada KW - PIPKIN Test KW - seismic waves KW - algorithms KW - nuclear explosions KW - earthquakes KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542648226?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=m+%28sub+b%29+%3AM+%28sub+s%29+screening+revisited+for+large+events&rft.au=Ford%2C+Sean+R%3BWalter%2C+William+R&rft.aulast=Ford&rft.aufirst=Sean&rft.date=2014-06-01&rft.volume=104&rft.issue=3&rft.spage=1550&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120130182 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. 2 tables N1 - Last updated - 2014-11-13 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; body waves; case studies; earthquakes; elastic waves; Elko County Nevada; Elko Nevada; explosions; HANDLEY test; magnitude; Nevada; nuclear explosions; P-waves; PIPKIN Test; seismic waves; United States DO - http://dx.doi.org/10.1785/0120130182 ER - TY - JOUR T1 - Validation of regional travel-time predictions along the Tethyan margin for three P-velocity models built with different approaches AN - 1542647085; 2014-051949 AB - We validate the performance of three P-velocity models built with different approaches on regional travel-time prediction for the Tethyan margin in order to test how well they predict independently observed travel times. The three models are constructed with travel-time tomography, a compilation of a priori geologic and geophysical information, and empirical scaling with adjustment from P-arrival inversion, respectively. We compared the synthetics with reference travel times (ground truth data) obtained by using events or explosions located within 25 km with 95% confidence. We found variance of travel times is not an adequate tool to assess the performance of velocity models, because predicted travel times that have small variance can have very different mean value from that of observed ones. Therefore, we propose an alternative way, variance estimation with mean of observed travel times (zero mean). This technique is more efficient to assess the mismatch between synthetics and observed travel times. Among the three models we investigated, the EAPV11 model built mainly with the empirical scaling shows better performance on the travel-time prediction. This result is intriguing, because this model inherits crustal velocity structure, Moho depth, Pn velocities, and upper-mantle structure that affects travel times at regional distance, mostly from a scaled 3D S-velocity model for the same region. This fact may imply that although errors may be included in this scaling, this way would work better than conventional P-arrival inversion. This difference likely exists because surface waves have a better lateral resolution for the crust and uppermost mantle than travel times. JF - Bulletin of the Seismological Society of America AU - Chang, Sung-Joon AU - Van der Lee, Suzan AU - Flanagan, Megan P Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1525 EP - 1532 PB - Seismological Society of America, Berkeley, CA VL - 104 IS - 3 SN - 0037-1106, 0037-1106 KW - Tethys KW - upper mantle KW - P-waves KW - body waves KW - three-dimensional models KW - prediction KW - mantle KW - elastic waves KW - Mohorovicic discontinuity KW - depth KW - models KW - spatial distribution KW - earthquake prediction KW - velocity structure KW - traveltime KW - velocity KW - focus KW - seismic waves KW - arrival time KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542647085?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Validation+of+regional+travel-time+predictions+along+the+Tethyan+margin+for+three+P-velocity+models+built+with+different+approaches&rft.au=Chang%2C+Sung-Joon%3BVan+der+Lee%2C+Suzan%3BFlanagan%2C+Megan+P&rft.aulast=Chang&rft.aufirst=Sung-Joon&rft.date=2014-06-01&rft.volume=104&rft.issue=3&rft.spage=1525&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120130308 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 - 18 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table, geol. sketch maps N1 - Last updated - 2014-07-04 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - arrival time; body waves; depth; earthquake prediction; earthquakes; elastic waves; focus; mantle; models; Mohorovicic discontinuity; P-waves; prediction; seismic waves; spatial distribution; Tethys; three-dimensional models; traveltime; upper mantle; velocity; velocity structure DO - http://dx.doi.org/10.1785/0120130308 ER - TY - JOUR T1 - Atmospheric Tides in the Latest Generation of Climate Models* AN - 1540234258; 20089513 AB - For atmospheric tides driven by solar heating, the database of climate model output used in the most recent assessment report of the Intergovernmental Panel on Climate Change (IPCC) confirms and extends the authors earlier results based on the previous generation of models. Both the present study and the earlier one examine the surface pressure signature of the tides, but the new database removes a shortcoming of the earlier study in which model simulations were not strictly comparable to observations. The present study confirms an approximate consistency among observations and all model simulations, despite variation of model tops from 31 to 144 km. On its face, this result is surprising because the dominant (semidiurnal) component of the tides is forced mostly by ozone heating around 3070-km altitude. Classical linear tide calculations and occasional numerical experimentation have long suggested that models with low tops achieve some consistency with observations by means of compensating errors, with wave reflection from the model top making up for reduced ozone forcing. Future work with the new database may confirm this hypothesis by additional classical calculations and analyses of the ozone heating profiles and wave reflection in Coupled Model Intercomparison Project (CMIP) models. The new generation of models also extends CMIP's purview to free-atmosphere fields including the middle atmosphere and above. JF - Journal of the Atmospheric Sciences AU - Covey, Curt AU - Dai, Aiguo AU - Lindzen, Richard S AU - Marsh, Daniel R AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Livermore, California Y1 - 2014/06// PY - 2014 DA - Jun 2014 SP - 1905 EP - 1913 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 71 IS - 6 SN - 0022-4928, 0022-4928 KW - Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts KW - Diurnal variations KW - Solar heating KW - Climate models KW - Atmospheric tides KW - Simulation KW - Intergovernmental Panel on Climate Change KW - Wave reflection KW - Atmosphere KW - Tides KW - Surface pressure KW - Altitude KW - Numerical simulations KW - Tide calculations KW - Ozone KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1540234258?accountid=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+the+Atmospheric+Sciences&rft.atitle=Atmospheric+Tides+in+the+Latest+Generation+of+Climate+Models*&rft.au=Covey%2C+Curt%3BDai%2C+Aiguo%3BLindzen%2C+Richard+S%3BMarsh%2C+Daniel+R&rft.aulast=Covey&rft.aufirst=Curt&rft.date=2014-06-01&rft.volume=71&rft.issue=6&rft.spage=1905&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+Atmospheric+Sciences&rft.issn=00224928&rft_id=info:doi/10.1175%2FJAS-D-13-0358.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 25 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Solar heating; Climate models; Tide calculations; Numerical simulations; Atmospheric tides; Wave reflection; Intergovernmental Panel on Climate Change; Surface pressure; Diurnal variations; Altitude; Simulation; Atmosphere; Tides; Ozone DO - http://dx.doi.org/10.1175/JAS-D-13-0358.1 ER - TY - JOUR T1 - Identification of Desulfobacterales as primary hydrogenotrophs in a complex microbial mat community AN - 1629943903; 2014-093865 AB - Hypersaline microbial mats have been shown to produce significant quantities of H (sub 2) under dark, anoxic conditions via cyanobacterial fermentation. This flux of a widely accessible microbial substrate has potential to significantly influence the ecology of the mat, and any consumption will affect the net efflux of H (sub 2) that might otherwise be captured as a resource. Here, we focus on H (sub 2) consumption in a microbial mat from Elkhorn Slough, California, USA, for which H (sub 2) production has been previously characterized. Active biologic H (sub 2) consumption in this mat is indicated by a significant time-dependent decrease in added H (sub 2) compared with a killed control. Inhibition of sulfate reduction, as indicated by a decrease in hydrogen sulfide production relative to controls, resulted in a significant increase in H (sub 2) efflux, suggesting that sulfate-reducing bacteria (SRB) are important hydrogenotrophs. Low methane efflux under these same conditions indicated that methanogens are likely not important hydrogenotrophs. Analyses of genes and transcripts that encode for rRNA or dissimilatory sulfite reductase, using both PCR-dependent and PCR-independent metatranscriptomic sequencing methods, demonstrated that Desulfobacterales are the dominant, active SRB in the upper, H (sub 2) -producing layer of the mat (0-2 mm). This hypothesis was further supported by the identification of transcripts encoding hydrogenases derived from Desulfobacterales capable of H (sub 2) oxidation. Analysis of molecular data provided no evidence for the activity of hydrogenotrophic methanogens. The combined biogeochemical and molecular data strongly indicate that SRB belonging to the Desulfobacterales are the quantitatively important hydrogenotrophs in the Elkhorn Slough mat. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - Geobiology AU - Burow, L C AU - Woebken, D AU - Marshall, I P G AU - Singer, S W AU - Pett-Ridge, J AU - Prufert-Bebout, L AU - Spormann, A M AU - Bebout, B M AU - Weber, P K AU - Hoehler, T M Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 221 EP - 230 PB - Blackwell, Oxford VL - 12 IS - 3 SN - 1472-4677, 1472-4677 KW - United States KW - communities KW - aliphatic hydrocarbons KW - microbial mats KW - California KW - intertidal environment KW - Monterey Bay KW - Monterey County California KW - Elkhorn Slough KW - sedimentary structures KW - Desulfobacterales KW - methane KW - living taxa KW - biogenic structures KW - statistical analysis KW - hydrogen sulfide KW - alkanes KW - genetics KW - organic compounds KW - nucleic acids KW - RNA KW - hydrogen KW - bacteria KW - hydrocarbons KW - DNA KW - coastal environment KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943903?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geobiology&rft.atitle=Identification+of+Desulfobacterales+as+primary+hydrogenotrophs+in+a+complex+microbial+mat+community&rft.au=Burow%2C+L+C%3BWoebken%2C+D%3BMarshall%2C+I+P+G%3BSinger%2C+S+W%3BPett-Ridge%2C+J%3BPrufert-Bebout%2C+L%3BSpormann%2C+A+M%3BBebout%2C+B+M%3BWeber%2C+P+K%3BHoehler%2C+T+M&rft.aulast=Burow&rft.aufirst=L&rft.date=2014-05-01&rft.volume=12&rft.issue=3&rft.spage=221&rft.isbn=&rft.btitle=&rft.title=Geobiology&rft.issn=14724677&rft_id=info:doi/10.1111%2Fgbi.12080 L2 - http://www.blackwellpublishing.com/journal.asp?ref=1472-4677 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 - 47 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2014-12-04 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; bacteria; biogenic structures; California; coastal environment; communities; Desulfobacterales; DNA; Elkhorn Slough; genetics; hydrocarbons; hydrogen; hydrogen sulfide; intertidal environment; living taxa; methane; microbial mats; Monterey Bay; Monterey County California; nucleic acids; organic compounds; RNA; sedimentary structures; statistical analysis; United States DO - http://dx.doi.org/10.1111/gbi.12080 ER - TY - JOUR T1 - The effects of recent uplift and volcanism on deposition in Mono Lake, California, from seismic-reflection (CHIRP) profiles AN - 1560085505; 2014-066131 AB - About 150 km of high-resolution, seismic reflection (Compressed High-Intensity Radar Pulse) profiles (approximately 20 m penetration) were collected in Mono Lake in order to define the uppermost sedimentary architecture of the basin, which has been heavily impacted by recent volcanic, tectonic, and climatic processes. The study also provides an important background for ongoing efforts to obtain paleoenvironmental records from sediment cores in the lake. The history of four seismic-stratigraphic units in the upper 20 m of section are inferred from the data, and the interpretations are generally consistent with previous interpretations of lake history for the past 2000 years, including a major lowstand at 1941 m. No shorelines below the previously documented major lowstand at 1941 m were found. A relatively steep slope segment, whose toe is at about 1918 m, and which occurs on the southern and western margins of the deep basin of the lake, is interpreted as the relict foreset slope of deposition from prograding western tributaries. This topography is unconformably overlain by a unit of interbedded tephra and lake sediments of variable lithology, which contains tephra of the North Mono (600-625 cal yr BP) eruption in its upper part. The tephra-rich unit is overlain by a mostly massive mudflow deposit that is locally more than 18 m thick and that is distributed in a radial pattern around Paoha Island. The evidence suggests that within the past few hundred years, rapid uplift of Paoha Island through thick, preexisting lake deposits led to widespread slope failures, which created a terrain of disrupted, intact blocks near the island, and a thick, fluid mudflow beyond. As is common in mudflows, the mudflow moved up the depositional slope of the lake floor, terminating against the preexisting slopes, likely in multiple surges. Since about 1700 Common Era, fine-grained, well-laminated sediments have accumulated in the deep parts of the lake at anomalously rapid rates, probably driven by continued rapid, small-scale shedding of sediment from Paoha Island. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Colman, S M AU - Hemming, S R AU - Stine, S AU - Zimmerman, S R H Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 3955 EP - 3970 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 5 SN - 2169-9313, 2169-9313 KW - United States KW - seismic profiles KW - Quaternary KW - geophysical surveys KW - Mono County California KW - uplifts KW - geophysical methods KW - reflection methods KW - Holocene KW - seismic methods KW - Cenozoic KW - California KW - paleoenvironment KW - Mono Lake KW - deposition KW - volcanism KW - sediments KW - lacustrine environment KW - surveys KW - geophysical profiles KW - tectonics KW - syntectonic processes KW - lake sediments KW - 24:Quaternary geology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560085505?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=The+effects+of+recent+uplift+and+volcanism+on+deposition+in+Mono+Lake%2C+California%2C+from+seismic-reflection+%28CHIRP%29+profiles&rft.au=Colman%2C+S+M%3BHemming%2C+S+R%3BStine%2C+S%3BZimmerman%2C+S+R+H&rft.aulast=Colman&rft.aufirst=S&rft.date=2014-05-01&rft.volume=119&rft.issue=5&rft.spage=3955&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2013JB010726 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 - 30 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - California; Cenozoic; deposition; geophysical methods; geophysical profiles; geophysical surveys; Holocene; lacustrine environment; lake sediments; Mono County California; Mono Lake; paleoenvironment; Quaternary; reflection methods; sediments; seismic methods; seismic profiles; surveys; syntectonic processes; tectonics; United States; uplifts; volcanism DO - http://dx.doi.org/10.1002/2013JB010726 ER - TY - JOUR T1 - Large scale seismic signal analysis with Hadoop AN - 1545406852; 2014-053286 AB - In seismology, waveform cross correlation has been used for years to produce high-precision hypocenter locations and for sensitive detectors. Because correlated seismograms generally are found only at small hypocenter separation distances, correlation detectors have historically been reserved for spotlight purposes. However, many regions have been found to produce large numbers of correlated seismograms, and there is growing interest in building next-generation pipelines that employ correlation as a core part of their operation. In an effort to better understand the distribution and behavior of correlated seismic events, we have cross correlated a global dataset consisting of over 300 million seismograms. This was done using a conventional distributed cluster, and required 42 days. In anticipation of processing much larger datasets, we have re-architected the system to run as a series of MapReduce jobs on a Hadoop cluster. In doing so we achieved a factor of 19 performance increase on a test dataset. We found that fundamental algorithmic transformations were required to achieve the maximum performance increase. Whereas in the original IO-bound implementation, we went to great lengths to minimize IO, in the Hadoop implementation where IO is cheap, we were able to greatly increase the parallelism of our algorithms by performing a tiered series of very fine-grained (highly parallelizable) transformations on the data. Each of these MapReduce jobs required reading and writing large amounts of data. But, because IO is very fast, and because the fine-grained computations could be handled extremely quickly by the mappers, the net was a large performance gain. Abstract Copyright (2014) Elsevier, B.V. JF - Computers & Geosciences AU - Addair, T G AU - Dodge, D A AU - Walter, W R AU - Ruppert, S D Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 145 EP - 154 PB - Elsevier, Amsterdam VL - 66 SN - 0098-3004, 0098-3004 KW - seismograms KW - monitoring KW - statistical analysis KW - data processing KW - mapping KW - correlation KW - waveforms KW - cluster analysis KW - spatial distribution KW - Hadoop method KW - crosscorrelation KW - data bases KW - focus KW - catalogs KW - algorithms KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545406852?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Large+scale+seismic+signal+analysis+with+Hadoop&rft.au=Addair%2C+T+G%3BDodge%2C+D+A%3BWalter%2C+W+R%3BRuppert%2C+S+D&rft.aulast=Addair&rft.aufirst=T&rft.date=2014-05-01&rft.volume=66&rft.issue=&rft.spage=145&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Geosciences&rft.issn=00983004&rft_id=info:doi/10.1016%2Fj.cageo.2014.01.014 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 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 21 N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-07-17 N1 - CODEN - GGEOD5 N1 - SubjectsTermNotLitGenreText - algorithms; catalogs; cluster analysis; correlation; crosscorrelation; data bases; data processing; earthquakes; focus; Hadoop method; mapping; monitoring; seismograms; spatial distribution; statistical analysis; waveforms DO - http://dx.doi.org/10.1016/j.cageo.2014.01.014 ER - TY - JOUR T1 - A chronology of Holocene and Little Ice Age glacier culminations of the Steingletscher, Central Alps, Switzerland, based on high-sensitivity beryllium-10 moraine dating AN - 1542642422; 2014-046666 AB - The amplitude and timing of past glacier culminations are sensitive recorders of key climate events on a regional scale. Precisely dating young moraines using cosmogenic nuclides to investigate Holocene glacier chronologies has proven challenging, but progress in the high-sensitivity (super 10) Be technique has recently been shown to enable the precise dating of moraines as young as a few hundred years. In this study we use (super 10) Be moraine dating to reconstruct culminations of the Steingletscher, a small mountain glacier in the central Swiss Alps, throughout the Holocene. The outermost-recorded positions of Steingletscher most likely occurred in the Early Holocene and appear nearly synchronous with glacier culminations reported from other regions in the Alps. A Late-Holocene position corroborates the evidence for a significant glacier advance of similar extent to that of the Little Ice Age (LIA) approximately 3 kyr ago. Finally, fourteen boulders from different moraines yield (super 10) Be ages between 580 and 140 years with analytical precisions mostly <10%, dating Steingletscher advances during the LIA. Because these LIA (super 10) Be ages are in stratigraphic order, we tentatively distinguish four LIA glacier culminations: about 1470 CE, 1650 CE, 1750 CE and 1820 CE, which are in good agreement with existing independent records during the LIA in the Swiss Alps. These findings illustrate the high potential of the (super 10) Be moraine dating method to directly link paleo-glacier-chronologies to historical records and thus present-day glacier evolution. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Schimmelpfennig, Irene AU - Schaefer, Joerg M AU - Akcar, Naki AU - Koffman, Tobias AU - Ivy-Ochs, Susan AU - Schwartz, Roseanne AU - Finkel, Robert C AU - Zimmerman, Susan AU - Schluechter, Christian Y1 - 2014/05/01/ PY - 2014 DA - 2014 May 01 SP - 220 EP - 230 PB - Elsevier, Amsterdam VL - 393 SN - 0012-821X, 0012-821X KW - Little Ice Age KW - isotopes KW - Alps KW - Europe KW - Holocene KW - exposure age KW - Switzerland KW - climate change KW - Cenozoic KW - Central Alps KW - radioactive isotopes KW - chronology KW - geochronology KW - Central Europe KW - sediments KW - moraines KW - alkaline earth metals KW - boulders KW - Steingletscher KW - Quaternary KW - Be-10 KW - clastic sediments KW - glaciers KW - Swiss Alps KW - Neoglacial KW - metals KW - upper Holocene KW - beryllium KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542642422?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+chronology+of+Holocene+and+Little+Ice+Age+glacier+culminations+of+the+Steingletscher%2C+Central+Alps%2C+Switzerland%2C+based+on+high-sensitivity+beryllium-10+moraine+dating&rft.au=Schimmelpfennig%2C+Irene%3BSchaefer%2C+Joerg+M%3BAkcar%2C+Naki%3BKoffman%2C+Tobias%3BIvy-Ochs%2C+Susan%3BSchwartz%2C+Roseanne%3BFinkel%2C+Robert+C%3BZimmerman%2C+Susan%3BSchluechter%2C+Christian&rft.aulast=Schimmelpfennig&rft.aufirst=Irene&rft.date=2014-05-01&rft.volume=393&rft.issue=&rft.spage=220&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.02.046 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 - 49 N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2014-07-04 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Alps; Be-10; beryllium; boulders; Cenozoic; Central Alps; Central Europe; chronology; clastic sediments; climate change; Europe; exposure age; geochronology; glaciers; Holocene; isotopes; Little Ice Age; metals; moraines; Neoglacial; Quaternary; radioactive isotopes; sediments; Steingletscher; Swiss Alps; Switzerland; upper Holocene DO - http://dx.doi.org/10.1016/j.epsl.2014.02.046 ER - TY - JOUR T1 - Closed-form shock solutions AN - 1722180846; PQ0002023165 AB - It is shown here that a subset of the implicit analytical shock solutions discovered by Becker and by Johnson can be inverted, yielding several exact closed-form solutions of the one-dimensional compressible Navier-Stokes equations for an ideal gas. For a constant dynamic viscosity and thermal conductivity, and at particular values of the shock Mach number, the velocity can be expressed in terms of a polynomial root. For a constant kinematic viscosity, independent of Mach number, the velocity can be expressed in terms of a hyperbolic tangent function. The remaining fluid variables are related to the velocity through simple algebraic expressions. The solutions derived here make excellent verification tests for numerical algorithms, since no source terms in the evolution equations are approximated, and the closed-form expressions are straightforward to implement. The solutions are also of some academic interest as they may provide insight into the nonlinear character of the Navier-Stokes equations and may stimulate further analytical developments. JF - Journal of Fluid Mechanics AU - Johnson, B M AD - Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, johnson359@llnl.gov Y1 - 2014/04/25/ PY - 2014 DA - 2014 Apr 25 SP - np PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 745 SN - 0022-1120, 0022-1120 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Testing Procedures KW - Mathematical models KW - Thermal conductivity KW - Dynamic viscosity KW - Algorithms KW - Velocity KW - Roots KW - Fluid Mechanics KW - Fluid mechanics KW - Viscosity KW - Navier-Stokes equations KW - Kinematic Viscosity KW - Thermal Conductivity KW - Evolution KW - Q2 09405:Oil and gas KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722180846?accountid=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+Fluid+Mechanics&rft.atitle=Closed-form+shock+solutions&rft.au=Johnson%2C+B+M&rft.aulast=Johnson&rft.aufirst=B&rft.date=2014-04-25&rft.volume=745&rft.issue=&rft.spage=np&rft.isbn=&rft.btitle=&rft.title=Journal+of+Fluid+Mechanics&rft.issn=00221120&rft_id=info:doi/10.1017%2Fjfm.2014.107 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-10-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Fluid mechanics; Mathematical models; Thermal conductivity; Dynamic viscosity; Navier-Stokes equations; Testing Procedures; Viscosity; Kinematic Viscosity; Algorithms; Roots; Velocity; Thermal Conductivity; Fluid Mechanics; Evolution DO - http://dx.doi.org/10.1017/jfm.2014.107 ER - TY - JOUR T1 - Attachment-detachment dynamics of suspended particle in porous media; experiment and modeling AN - 1542645771; 2014-048614 AB - Clogging problems occur frequently during the process of artificial recharge, and especially physical clogging, caused by suspended particles in the water, seriously affects the recharge efficiency. In our study, a mathematical model for simulating porous physical clogging were developed by coupling the model of particle transition-deposition in porous media and expressions correlating permeability coefficient, porosity and concentration of deposited particles, to provide a systematic description of the occurrence and development of physical clogging. In addition, the attachment and detachment coefficients in above model which used to be adopted as fixed values were found influenced by the Darcy velocity. And the experimental protocol to determine the particle attachment and detachment parameter was also proposed in the study. With a lower velocity, particles were attached to the surface of the grains, whereas when the velocity became higher, particles were gradually detached from the grain surface. When the deposited particles occupied the pore space, media clogging may occur. The modeling verification indicated that the calculated values displayed a good qualitative agreement with the measured values of the 1-D column test, therefore, the improved method for valuing attachment and detachment parameters can be used for the prediction of artificial recharge clogging. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Hydrology AU - Zheng, Xilai AU - Shan, Beibei AU - Chen, Lei AU - Sun, Yun-Wei AU - Zhang, Shuhui Y1 - 2014/04/16/ PY - 2014 DA - 2014 Apr 16 SP - 199 EP - 204 PB - Elsevier, Amsterdam VL - 511 SN - 0022-1694, 0022-1694 KW - experimental studies KW - numerical models KW - clastic sediments KW - Darcy's law KW - clogging KW - artificial recharge KW - suspended materials KW - porous materials KW - mathematical models KW - simulation KW - seepage KW - reservoir rocks KW - ground water KW - aquifers KW - models KW - recharge KW - mathematical methods KW - sediments KW - velocity KW - reservoir properties KW - permeability KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542645771?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Attachment-detachment+dynamics+of+suspended+particle+in+porous+media%3B+experiment+and+modeling&rft.au=Zheng%2C+Xilai%3BShan%2C+Beibei%3BChen%2C+Lei%3BSun%2C+Yun-Wei%3BZhang%2C+Shuhui&rft.aulast=Zheng&rft.aufirst=Xilai&rft.date=2014-04-16&rft.volume=511&rft.issue=&rft.spage=199&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2014.01.039 L2 - http://www.sciencedirect.com/science/journal/00221694 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 - 27 N1 - Document feature - illus. N1 - Last updated - 2014-07-04 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - aquifers; artificial recharge; clastic sediments; clogging; Darcy's law; experimental studies; ground water; mathematical methods; mathematical models; models; numerical models; permeability; porous materials; recharge; reservoir properties; reservoir rocks; sediments; seepage; simulation; suspended materials; velocity DO - http://dx.doi.org/10.1016/j.jhydrol.2014.01.039 ER - TY - JOUR T1 - Deep South Atlantic carbonate chemistry and increased interocean deep water exchange during last deglaciation AN - 1629938392; 2014-096595 AB - Carbon release from the deep ocean at glacial terminations is a critical component of past climate change, but the underlying mechanisms remain poorly understood. We present a 28,000-year high-resolution record of carbonate ion concentration, a key parameter of the global carbon cycle, at 5-km water depth in the South Atlantic. We observe similar carbonate ion concentrations between the Last Glacial Maximum and the late Holocene, despite elevated concentrations in the glacial surface ocean. This strongly supports the importance of respiratory carbon accumulation in a stratified deep ocean for atmospheric CO (sub 2) reduction during the last ice age. After approximately 9 mu mol/kg decline during Heinrich Stadial 1, deep South Atlantic carbonate ion concentration rose by approximately 24 mu mol/kg from the onset of Bolling to Pre-boreal, likely caused by strengthening North Atlantic Deep Water formation (Bolling) or increased ventilation in the Southern Ocean (Younger Drays) or both (Pre-boreal). The approximately 15 mu mol/kg decline in deep water carbonate ion since approximately 10 ka is consistent with extraction of alkalinity from seawater by deep-sea CaCO (sub 3) compensation and coral reef growth on continental shelves during the Holocene. Between 16,600 and 15,000 years ago, deep South Atlantic carbonate ion values converged with those at 3.4-km water depth in the western equatorial Pacific, as did carbon isotope and radiocarbon values. These observations suggest a period of enhanced lateral exchange of carbon between the deep South Atlantic and Pacific Oceans, probably due to an increased transfer of momentum from southern westerlies to the Southern Ocean. By spreading carbon-rich deep Pacific waters around Antarctica for upwelling, invigorated interocean deep water exchange would lead to more efficient CO (sub 2) degassing from the Southern Ocean, and thus to an atmospheric CO (sub 2) rise, during the early deglaciation. Abstract Copyright (2014) Elsevier, B.V. JF - Quaternary Science Reviews AU - Yu, Jimin AU - Anderson, Robert F AU - Jin, Zhangdong AU - Menviel, Laurie AU - Zhang, Fei AU - Ryerson, Frederick J AU - Rohling, Eelco J Y1 - 2014/04/15/ PY - 2014 DA - 2014 Apr 15 SP - 80 EP - 89 PB - Elsevier VL - 90 SN - 0277-3791, 0277-3791 KW - calcium KW - lithostratigraphy KW - Cape Basin KW - sea water KW - isotopes KW - paleo-oceanography KW - Holocene KW - stable isotopes KW - deglaciation KW - cores KW - carbon dioxide KW - upper Pleistocene KW - Foraminifera KW - Cenozoic KW - marine sediments KW - radioactive isotopes KW - dates KW - carbon KW - sediments KW - chemostratigraphy KW - absolute age KW - Invertebrata KW - calcium carbonate KW - concentration KW - alkaline earth metals KW - carbonate ion KW - Protista KW - Quaternary KW - chronostratigraphy KW - isotope ratios KW - C-13/C-12 KW - geochemical cycle KW - Southeast Atlantic KW - metals KW - B/Ca KW - Pleistocene KW - boron KW - South Atlantic KW - reconstruction KW - carbon cycle KW - C-14 KW - microfossils KW - Atlantic Ocean KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629938392?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Deep+South+Atlantic+carbonate+chemistry+and+increased+interocean+deep+water+exchange+during+last+deglaciation&rft.au=Yu%2C+Jimin%3BAnderson%2C+Robert+F%3BJin%2C+Zhangdong%3BMenviel%2C+Laurie%3BZhang%2C+Fei%3BRyerson%2C+Frederick+J%3BRohling%2C+Eelco+J&rft.aulast=Yu&rft.aufirst=Jimin&rft.date=2014-04-15&rft.volume=90&rft.issue=&rft.spage=80&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2Fj.quascirev.2014.02.018 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 - 2014-01-01 N1 - Number of references - 75 N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - absolute age; alkaline earth metals; Atlantic Ocean; B/Ca; boron; C-13/C-12; C-14; calcium; calcium carbonate; Cape Basin; carbon; carbon cycle; carbon dioxide; carbonate ion; Cenozoic; chemostratigraphy; chronostratigraphy; concentration; cores; dates; deglaciation; Foraminifera; geochemical cycle; Holocene; Invertebrata; isotope ratios; isotopes; lithostratigraphy; marine sediments; metals; microfossils; paleo-oceanography; Pleistocene; Protista; Quaternary; radioactive isotopes; reconstruction; sea water; sediments; South Atlantic; Southeast Atlantic; stable isotopes; upper Pleistocene DO - http://dx.doi.org/10.1016/j.quascirev.2014.02.018 ER - TY - JOUR T1 - Experimental investigation of shear strength of sands with inherent fabric anisotropy AN - 1832592342; 693253-6 AB - Loading direction-dependent strength of sand has been traditionally characterized in the principal stress space as a direct extension of the Mohr-Coulomb criterion. A recent study found that it is more appropriate to define anisotropic strength of sand on failure/shear planes, but this proposition has only been demonstrated with discrete element method (DEM) simulations. The present study experimentally investigates anisotropic shear strength of sands in this new framework. Three granular materials with distinct grain characteristics ranging from smooth and rounded particles to flaky and angular particles are tested with the bedding plane inclination angle psi (sub b) varying over the full range of 0 degrees -180 degrees . The main objective is to study how the peak friction angle Phi (sub p) of sand is affected by the psi (sub b) angle and how the psi (sub b) -Phi (sub p) relationship evolves with the change of characteristics of constituent sand particles. We find that the general trend of psi (sub b) -Phi (sub p) curves for real sands resembles what was predicted by DEM in a previous study, whereas rich anisotropic strength behavior is revealed by the laboratory data. The effects of normal stress and initial density, as well as shear dilation behavior at different shear directions, are also studied. Copyright 2014 Springer-Verlag Berlin Heidelberg JF - Acta Geotechnica (Berlin) AU - Tong, Zhaoxia AU - Fu, Pengcheng AU - Zhou, Shaopeng AU - Dafalias, Yannis F Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 257 EP - 275 PB - Springer-Verlag, co-published with Versita, Heidelberg-Berlin VL - 9 IS - 2 SN - 1861-1125, 1861-1125 KW - soil mechanics KW - sand KW - failures KW - shear strength KW - numerical models KW - density KW - clastic sediments KW - silt KW - mechanical properties KW - triaxial tests KW - granular materials KW - sediments KW - load tests KW - fabric KW - dilation KW - slope stability KW - anisotropy KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832592342?accountid=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=Acta+Geotechnica+%28Berlin%29&rft.atitle=Experimental+investigation+of+shear+strength+of+sands+with+inherent+fabric+anisotropy&rft.au=Tong%2C+Zhaoxia%3BFu%2C+Pengcheng%3BZhou%2C+Shaopeng%3BDafalias%2C+Yannis+F&rft.aulast=Tong&rft.aufirst=Zhaoxia&rft.date=2014-04-01&rft.volume=9&rft.issue=2&rft.spage=257&rft.isbn=&rft.btitle=&rft.title=Acta+Geotechnica+%28Berlin%29&rft.issn=18611125&rft_id=info:doi/10.1007%2Fs11440-014-0303-6 L2 - http://www.springerlink.com/content/1861-1133/?p 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 N1 - SubjectsTermNotLitGenreText - anisotropy; clastic sediments; density; dilation; fabric; failures; granular materials; load tests; mechanical properties; numerical models; sand; sediments; shear strength; silt; slope stability; soil mechanics; triaxial tests DO - http://dx.doi.org/10.1007/s11440-014-0303-6 ER - TY - JOUR T1 - Nongeocentric axial dipole field behavior during the Mono Lake excursion AN - 1618131883; 2014-086367 AB - A new record of the Mono Lake excursion (MLE) is reported from the Summer Lake Basin of Oregon, USA. Sediment magnetic properties indicate magnetite as the magnetization carrier and imply suitability of the sediments as accurate recorders of the magnetic field including relative paleointensity (RPI) variations. The magnitudes and phases of the declination, inclination, and RPI components of the new record correlate well with other coeval but lower resolution records from western North America including records from the Wilson Creek Formation exposed around Mono Lake. The virtual geomagnetic pole (VGP) path of the new record is similar to that from another high-resolution record of the MLE from Ocean Drilling Program (ODP) Site 919 in the Irminger Basin between Iceland and Greenland but different from the VGP path for the Laschamp excursion (LE), including that found lower in the ODP-919 core. Thus, the prominent excursion recorded at Mono Lake, California, is not the LE but rather one that is several thousands of years younger. The MLE VGP path contains clusters, the locations of which coincide with nonaxial dipole features found in the Holocene geomagnetic field. The clusters are occupied in the same time progression by VGPs from Summer Lake and the Irminger Basin, but the phase of occupation is offset, a behavior that suggests time-transgressive decay and return of the principal field components at the beginning and end of the MLE, respectively, leaving the nonaxial dipole features associated with the clusters dominant during the excursion. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Negrini, Robert M AU - McCuan, Daniel T AU - Horton, Robert A AU - Lopez, James D AU - Cassata, William S AU - Channell, James E T AU - Verosub, Kenneth L AU - Knott, Jeffrey R AU - Coe, Robert S AU - Liddicoat, Joseph C AU - Lund, Steven P AU - Benson, Larry V AU - Sarna-Wojcicki, Andrei M Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 2567 EP - 2581 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 4 SN - 2169-9313, 2169-9313 KW - United States KW - ODP Site 919 KW - magnetic properties KW - upper Pleistocene KW - Lake County Oregon KW - Cenozoic KW - California KW - Oregon KW - marine sediments KW - magnetic excursions KW - sediments KW - Mono Lake Excursion KW - Leg 152 KW - Summer Lake KW - Quaternary KW - Mono County California KW - paleomagnetism KW - Irminger Basin KW - Mono Lake KW - Pleistocene KW - Ocean Drilling Program KW - North Atlantic KW - Atlantic Ocean KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618131883?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Nongeocentric+axial+dipole+field+behavior+during+the+Mono+Lake+excursion&rft.au=Negrini%2C+Robert+M%3BMcCuan%2C+Daniel+T%3BHorton%2C+Robert+A%3BLopez%2C+James+D%3BCassata%2C+William+S%3BChannell%2C+James+E+T%3BVerosub%2C+Kenneth+L%3BKnott%2C+Jeffrey+R%3BCoe%2C+Robert+S%3BLiddicoat%2C+Joseph+C%3BLund%2C+Steven+P%3BBenson%2C+Larry+V%3BSarna-Wojcicki%2C+Andrei+M&rft.aulast=Negrini&rft.aufirst=Robert&rft.date=2014-04-01&rft.volume=119&rft.issue=4&rft.spage=2567&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2013JB010846 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 - 36 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Atlantic Ocean; California; Cenozoic; Irminger Basin; Lake County Oregon; lake sediments; Leg 152; magnetic excursions; magnetic properties; marine sediments; Mono County California; Mono Lake; Mono Lake Excursion; North Atlantic; Ocean Drilling Program; ODP Site 919; Oregon; paleomagnetism; Pleistocene; Quaternary; sediments; Summer Lake; United States; upper Pleistocene DO - http://dx.doi.org/10.1002/2013JB010846 ER - TY - JOUR T1 - Partitioning of seismoacoustic energy and estimation of yield and height-of-burst/depth-of-burial for near-surface explosions AN - 1529799532; 2014-036967 AB - Explosions near the Earth"s surface excite both seismic ground motions and atmospheric overpressure. The energy transferred to the ground and atmosphere from a near-surface explosion depends on yield (W) as well as the height-of-burst/depth-of-burial (HOB/DOB) for above/belowground emplacements. We report analyses of seismic and overpressure motions from the Humble Redwood series of low-yield, near-surface chemical explosions with the aim of developing quantitative models of energy partitioning and a methodology to estimate W and HOB/DOB. The effects of yield, HOB, and range on amplitudes can be cast into separable functions of range and HOB scaled by yield. We find that displacement of the initial P wave and the integral of the positive overpressure (impulse) are diagnostic of W and HOB with minimal scatter. An empirical model describing the dependence of seismic and air-blast measurements on W, HOB/DOB, and range is determined and model parameters are found by regression. We find seismic amplitudes for explosions of a given yield emplaced at or above the surface are reduced by a factor of 3 relative to fully contained explosions below ground. Air-blast overpressure is reduced more dramatically, with impulse reduced by a factor of 100 for deeply buried explosions relative to surface blasts. Our signal models are used to invert seismic and overpressure measurements for W and HOB and we find good agreement (W errors <30%, HOB within meters) with ground-truth values for four noncircular validation tests. Although there is a trade-off between W and HOB for a single seismic or overpressure measurement, the use of both measurement types allows us to largely break this trade-off and better constrain W and HOB. However, both models lack resolution of HOB for aboveground explosions. JF - Bulletin of the Seismological Society of America AU - Ford, Sean R AU - Rodgers, Arthur J AU - Xu, Heming AU - Templeton, Dennise C AU - Harben, Philip AU - Foxall, William AU - Reinke, Robert E Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 608 EP - 623 PB - Seismological Society of America, Berkeley, CA VL - 104 IS - 2 SN - 0037-1106, 0037-1106 KW - United States KW - seismograms KW - P-waves KW - body waves KW - technology KW - explosions KW - Bernalillo County New Mexico KW - elastic waves KW - New Mexico KW - seismic sources KW - depth KW - models KW - Humble Redwood Experiment KW - seismicity KW - Kirtland Air Force Base KW - ground motion KW - seismic waves KW - seismic networks KW - seismic energy KW - earthquakes KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529799532?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Partitioning+of+seismoacoustic+energy+and+estimation+of+yield+and+height-of-burst%2Fdepth-of-burial+for+near-surface+explosions&rft.au=Ford%2C+Sean+R%3BRodgers%2C+Arthur+J%3BXu%2C+Heming%3BTempleton%2C+Dennise+C%3BHarben%2C+Philip%3BFoxall%2C+William%3BReinke%2C+Robert+E&rft.aulast=Ford&rft.aufirst=Sean&rft.date=2014-04-01&rft.volume=104&rft.issue=2&rft.spage=608&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120130130 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 - 42 N1 - PubXState - CA N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-05-29 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - amplitude; Bernalillo County New Mexico; body waves; depth; earthquakes; elastic waves; explosions; ground motion; Humble Redwood Experiment; Kirtland Air Force Base; models; New Mexico; P-waves; seismic energy; seismic networks; seismic sources; seismic waves; seismicity; seismograms; technology; United States DO - http://dx.doi.org/10.1785/0120130130 ER - TY - JOUR T1 - Qingsongite, natural cubic boron nitride; the first boron mineral from the Earth's mantle AN - 1520104931; 2014-030314 AB - Qingsongite (IMA 2013-30) is the natural analog of cubic boron nitride (c-BN), which is widely used as an abrasive under the name "Borazon." The mineral is named for Qingsong Fang (1939-2010), who found the first diamond in the Luobusa chromitite. Qingsongite occurs in a rock fragment less than 1 mm across extracted from chromitite in deposit 31, Luobusa ophiolite, Yarlung Zangbu suture, southern Tibet at 29 degrees 13.86N and 92 degrees 11.41E. Five electron microprobe analyses gave B 48.54 + or - 0.65 wt% (range 47.90-49.2 wt%); N 51.46 + or - 0.65 wt% (range 52.10-50.8 wt%), corresponding to B (sub 1.113) N (sub 0.887) and B (sub 1.087) N (sub 0.913) , for maximum and minimum B contents, respectively (based on 2 atoms per formula unit); no other elements that could substitute for B or N were detected. Crystallographic data on qingsongite obtained using fast Fourier transforms gave cubic symmetry, a = 3.61 + or - 0.045 Aa. The density calculated for the mean composition B (sub 1.100) N (sub 0.900) is 3.46 g/cm (super 3) , i.e., qingsongite is nearly identical to synthetic c-BN. The synthetic analog has the sphalerite structure, space group F43m. Mohs hardness of the synthetic analog is between 9 and 10; its cleavage is {011}. Qingsongite forms isolated anhedral single crystals up to 1 mu m in size in the marginal zone of the fragment; this zone consists of approximately 45 modal% coesite, approximately 15% kyanite, and approximately 40% amorphous material. Qingsongite is enclosed in kyanite, coesite, or in osbornite; other associated phases include native Fe; TiO (sub 2) II, a high-pressure polymorph of rutile with the alpha PbO (sub 2) structure; boron carbide of unknown stoichiometry; and amorphous carbon. Coesite forms prisms several tens of micrometers long, but is polycrystalline, and thus interpreted to be pseudomorphic after stishovite. Associated minerals constrain the estimated pressure to 10-15 GPa assuming temperature was about 1300 degrees C. Our proposed scenario for formation of qingsongite begins with a pelitic rock fragment that was subducted to mid-mantle depths where crustal B originally present in mica or clay combined with mantle N (delta (super 15) N = -10.4 + or - 3 per mil in osbornite) and subsequently exhumed by entrainment in chromitite. The presence of qingsongite has implications for understanding the recycling of crustal material back to the Earth's mantle since boron, an essential constituent of qingsongite, is potentially an ideal tracer of material from Earth's surface. JF - American Mineralogist AU - Dobrzhinetskaya, Larissa F AU - Wirth, Richard AU - Yang, Jingsui AU - Green, Harry W AU - Hutcheon, Ian D AU - Weber, Peter K AU - Grew, Edward S Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 764 EP - 772 PB - Mineralogical Society of America, Washington, DC VL - 99 IS - 4 SN - 0003-004X, 0003-004X KW - silicates KW - Far East KW - X-ray diffraction data KW - silica minerals KW - isotopes KW - crystal systems KW - igneous rocks KW - unit cell KW - mantle KW - crystal structure KW - stishovite KW - stable isotopes KW - nitrogen KW - electron probe data KW - polymorphism KW - plutonic rocks KW - Indus-Yarlung Zangbo suture zone KW - Xizang China KW - Tibetan Plateau KW - chromitite KW - qingsongite KW - orthosilicates KW - oxides KW - framework silicates KW - alloys KW - hardness KW - chemical composition KW - Asia KW - new minerals KW - cubic system KW - China KW - boron nitride KW - N-15/N-14 KW - space groups KW - isotope ratios KW - kyanite KW - ophiolite KW - nitrides KW - osbornite KW - ultramafics KW - nesosilicates KW - Luobusa Ophiolite KW - rutile KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520104931?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Qingsongite%2C+natural+cubic+boron+nitride%3B+the+first+boron+mineral+from+the+Earth%27s+mantle&rft.au=Dobrzhinetskaya%2C+Larissa+F%3BWirth%2C+Richard%3BYang%2C+Jingsui%3BGreen%2C+Harry+W%3BHutcheon%2C+Ian+D%3BWeber%2C+Peter+K%3BGrew%2C+Edward+S&rft.aulast=Dobrzhinetskaya&rft.aufirst=Larissa&rft.date=2014-04-01&rft.volume=99&rft.issue=4&rft.spage=764&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam.2014.4714 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. 3 tables N1 - Last updated - 2014-05-01 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - alloys; Asia; boron nitride; chemical composition; China; chromitite; crystal structure; crystal systems; cubic system; electron probe data; Far East; framework silicates; hardness; igneous rocks; Indus-Yarlung Zangbo suture zone; isotope ratios; isotopes; kyanite; Luobusa Ophiolite; mantle; N-15/N-14; nesosilicates; new minerals; nitrides; nitrogen; ophiolite; orthosilicates; osbornite; oxides; plutonic rocks; polymorphism; qingsongite; rutile; silica minerals; silicates; space groups; stable isotopes; stishovite; Tibetan Plateau; ultramafics; unit cell; X-ray diffraction data; Xizang China DO - http://dx.doi.org/10.2138/am.2014.4714 ER - TY - JOUR T1 - Regional phase attenuation in the Iranian Plateau and surrounding regions AN - 1828847098; 2015-120423 JF - Seismological Research Letters AU - Sandvol, E AU - Kaviani, A AU - Ku, W AU - Gok, R AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 432 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - tomography KW - upper mantle KW - P-waves KW - Iran KW - body waves KW - mantle KW - elastic waves KW - models KW - attenuation KW - seismicity KW - seismic waves KW - Asia KW - Middle East KW - crust KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828847098?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Regional+phase+attenuation+in+the+Iranian+Plateau+and+surrounding+regions&rft.au=Sandvol%2C+E%3BKaviani%2C+A%3BKu%2C+W%3BGok%2C+R%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Sandvol&rft.aufirst=E&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=432&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 - Asia; attenuation; body waves; crust; elastic waves; Iran; mantle; Middle East; models; P-waves; seismic waves; seismicity; tomography; upper mantle ER - TY - JOUR T1 - Three dimensional simulation of ground motions generated by underground explosions in jointed rock under conditions of uncertainty AN - 1828845287; 2015-120357 JF - Seismological Research Letters AU - Ezzedine, S M AU - Vorobiev, O Y AU - Glenn, L A AU - Antoun, T H 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 - underground space KW - three-dimensional models KW - explosions KW - Monte Carlo analysis KW - statistical analysis KW - joints KW - simulation KW - rock mechanics KW - fractures KW - style KW - seismicity KW - ground motion KW - propagation KW - earthquakes KW - uncertainty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828845287?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Three+dimensional+simulation+of+ground+motions+generated+by+underground+explosions+in+jointed+rock+under+conditions+of+uncertainty&rft.au=Ezzedine%2C+S+M%3BVorobiev%2C+O+Y%3BGlenn%2C+L+A%3BAntoun%2C+T+H%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Ezzedine&rft.aufirst=S&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 - earthquakes; explosions; fractures; ground motion; joints; Monte Carlo analysis; propagation; rock mechanics; seismicity; simulation; statistical analysis; style; three-dimensional models; uncertainty; underground space ER - TY - JOUR T1 - Improving yield estimation for near-surface explosions using seismic and overpressure data AN - 1819898206; 2015-120364 JF - Seismological Research Letters AU - Rodgers, A J AU - Bonner, J L AU - Ford, S R AU - Templeton, D C AU - Ramirez, A L AU - Dodge, D AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 420 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - overpressure KW - methods KW - bedrock KW - discriminant analysis KW - explosions KW - clastic sediments KW - statistical analysis KW - elastic waves KW - information management KW - data management KW - partitioning KW - seismicity KW - sediments KW - ground motion KW - alluvium KW - nuclear explosions KW - earthquakes KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819898206?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Improving+yield+estimation+for+near-surface+explosions+using+seismic+and+overpressure+data&rft.au=Rodgers%2C+A+J%3BBonner%2C+J+L%3BFord%2C+S+R%3BTempleton%2C+D+C%3BRamirez%2C+A+L%3BDodge%2C+D%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Rodgers&rft.aufirst=A&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=420&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 - alluvium; amplitude; bedrock; clastic sediments; data management; discriminant analysis; earthquakes; elastic waves; explosions; ground motion; information management; methods; nuclear explosions; overpressure; partitioning; sediments; seismicity; statistical analysis ER - TY - JOUR T1 - Predicting P and S wave body wave travel times at regional and teleseismic distances AN - 1800395804; 2016-054962 JF - Seismological Research Letters AU - Simmons, N A AU - Myers, S C AU - Johannesson, G AU - Matzel, E AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 550 EP - 551 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - P-waves KW - body waves KW - technology KW - prediction KW - phase transitions KW - elastic waves KW - teleseismic signals KW - Mohorovicic discontinuity KW - seismicity KW - traveltime KW - seismic waves KW - S-waves KW - crust KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800395804?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Predicting+P+and+S+wave+body+wave+travel+times+at+regional+and+teleseismic+distances&rft.au=Simmons%2C+N+A%3BMyers%2C+S+C%3BJohannesson%2C+G%3BMatzel%2C+E%3BAnonymous&rft.aulast=Simmons&rft.aufirst=N&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=550&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 - body waves; crust; elastic waves; Mohorovicic discontinuity; P-waves; phase transitions; prediction; S-waves; seismic waves; seismicity; technology; teleseismic signals; traveltime ER - TY - JOUR T1 - Accurate depth determination of earthquakes along the Kuril Islands outer rise from waveform modeling AN - 1800395689; 2016-054954 JF - Seismological Research Letters AU - Mejia, H AU - Polet, J AU - Thio, Hong Kie AU - Pitarka, A AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 549 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - Russian Pacific region KW - Sakhalin Russian Federation KW - P-waves KW - body waves KW - three-dimensional models KW - finite difference analysis KW - elastic waves KW - waveforms KW - Russian Federation KW - depth KW - Kuril Islands KW - Commonwealth of Independent States KW - seismicity KW - seismic waves KW - compression KW - Asia KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800395689?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Accurate+depth+determination+of+earthquakes+along+the+Kuril+Islands+outer+rise+from+waveform+modeling&rft.au=Mejia%2C+H%3BPolet%2C+J%3BThio%2C+Hong+Kie%3BPitarka%2C+A%3BAnonymous&rft.aulast=Mejia&rft.aufirst=H&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=549&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 - Asia; body waves; Commonwealth of Independent States; compression; depth; earthquakes; elastic waves; finite difference analysis; Kuril Islands; P-waves; Russian Federation; Russian Pacific region; Sakhalin Russian Federation; seismic waves; seismicity; three-dimensional models; waveforms ER - TY - JOUR T1 - Developing worldwide capacity for analysis of data supporting earthquake hazard analysis AN - 1800394141; 2016-054904 JF - Seismological Research Letters AU - Willemann, Ray J AU - Beck, S L AU - Sandvol, E AU - Meltzer, A S AU - Pasyanos, M E AU - Louie, J N AU - Waldhauser, F AU - Russo, R M AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 538 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - technology KW - geologic hazards KW - seismic risk KW - natural hazards KW - risk assessment KW - information management KW - earthquakes KW - instruments KW - data management KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800394141?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+worldwide+capacity+for+analysis+of+data+supporting+earthquake+hazard+analysis&rft.au=Willemann%2C+Ray+J%3BBeck%2C+S+L%3BSandvol%2C+E%3BMeltzer%2C+A+S%3BPasyanos%2C+M+E%3BLouie%2C+J+N%3BWaldhauser%2C+F%3BRusso%2C+R+M%3BAnonymous&rft.aulast=Willemann&rft.aufirst=Ray&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=538&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; earthquakes; geologic hazards; information management; instruments; natural hazards; risk assessment; seismic risk; technology ER - TY - JOUR T1 - Examination of the Storfjorden aftershock sequence AN - 1800394097; 2016-054958 JF - Seismological Research Letters AU - Junek, William N AU - Kvarena, T AU - Pirli, M AU - Schweitzer, J AU - Dodge, D A AU - Woods, M T AU - Vandemark, Thomas F AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 550 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - technology KW - Svalbard KW - Arctic region KW - Spitsbergen KW - Storfjorden KW - aftershocks KW - Spitsbergen earthquake 2008 KW - seismicity KW - tectonics KW - earthquakes KW - seismotectonics KW - faults KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800394097?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Examination+of+the+Storfjorden+aftershock+sequence&rft.au=Junek%2C+William+N%3BKvarena%2C+T%3BPirli%2C+M%3BSchweitzer%2C+J%3BDodge%2C+D+A%3BWoods%2C+M+T%3BVandemark%2C+Thomas+F%3BAnonymous&rft.aulast=Junek&rft.aufirst=William&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=550&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 - 2016-11-17 N1 - SubjectsTermNotLitGenreText - aftershocks; Arctic region; earthquakes; faults; seismicity; seismotectonics; Spitsbergen; Spitsbergen earthquake 2008; Storfjorden; Svalbard; technology; tectonics ER - TY - JOUR T1 - A global comparison of crustal earthquake scaling form stable event ratio levels AN - 1800392566; 2016-054854 JF - Seismological Research Letters AU - Yoo, S H AU - Walter, W R AU - Mayeda, K AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 528 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - models KW - technology KW - seismicity KW - stress KW - earthquakes KW - uncertainty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392566?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+global+comparison+of+crustal+earthquake+scaling+form+stable+event+ratio+levels&rft.au=Yoo%2C+S+H%3BWalter%2C+W+R%3BMayeda%2C+K%3BAnonymous&rft.aulast=Yoo&rft.aufirst=S&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=528&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 - earthquakes; models; seismicity; stress; technology; uncertainty ER - TY - JOUR T1 - A seismo-acoustic infrasound methodology for accurate large scale simulations AN - 1800392448; 2016-054917 JF - Seismological Research Letters AU - Petersson, N A AU - Sjogreen, B AU - Rodgers, A J AU - Anonymous Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 541 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - models KW - technology KW - geologic hazards KW - seismic risk KW - natural hazards KW - risk assessment KW - propagation KW - simulation KW - earthquakes KW - instruments KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392448?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+seismo-acoustic+infrasound+methodology+for+accurate+large+scale+simulations&rft.au=Petersson%2C+N+A%3BSjogreen%2C+B%3BRodgers%2C+A+J%3BAnonymous&rft.aulast=Petersson&rft.aufirst=N&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=541&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 - earthquakes; geologic hazards; instruments; models; natural hazards; propagation; risk assessment; seismic risk; simulation; technology ER - TY - JOUR T1 - Understanding shear motion from underground explosions in granite AN - 1756506817; 2015-120505 JF - Seismological Research Letters AU - Vorobiev, O Y AU - Stroujkova, A AU - Ezzedine, S M E AU - Herbold, E B AU - Glenn, L A AU - Antoun, T H Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 449 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - experimental studies KW - topography KW - plutonic rocks KW - underground space KW - seismicity KW - explosions KW - igneous rocks KW - granites KW - ground motion KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506817?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Understanding+shear+motion+from+underground+explosions+in+granite&rft.au=Vorobiev%2C+O+Y%3BStroujkova%2C+A%3BEzzedine%2C+S+M+E%3BHerbold%2C+E+B%3BGlenn%2C+L+A%3BAntoun%2C+T+H&rft.aulast=Vorobiev&rft.aufirst=O&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=449&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 - earthquakes; experimental studies; explosions; granites; ground motion; igneous rocks; plutonic rocks; seismicity; topography; underground space ER - TY - JOUR T1 - Source Physics Experiment site characterizations; earthquake relocation and Southern Nevada attenuation structure AN - 1756506421; 2015-120518 JF - Seismological Research Letters AU - Pyle, M L AU - Walter, W R AU - Pasyanos, M E AU - Myers, S C AU - Smith, Ken D AU - Hauk, T F 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 - United States KW - attenuation KW - southern Nevada KW - experimental studies KW - seismicity KW - explosions KW - chemical explosions KW - focus KW - earthquakes KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506421?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Source+Physics+Experiment+site+characterizations%3B+earthquake+relocation+and+Southern+Nevada+attenuation+structure&rft.au=Pyle%2C+M+L%3BWalter%2C+W+R%3BPasyanos%2C+M+E%3BMyers%2C+S+C%3BSmith%2C+Ken+D%3BHauk%2C+T+F&rft.aulast=Pyle&rft.aufirst=M&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 - attenuation; chemical explosions; earthquakes; experimental studies; explosions; focus; Nevada; seismicity; southern Nevada; United States ER - TY - JOUR T1 - High resolution imagery of the Source Physics Experiment site using seismic interferometry AN - 1756506373; 2015-120519 JF - Seismological Research Letters AU - Matzel, E AU - Pitarka, A 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 - high-resolution methods KW - attenuation KW - imagery KW - experimental studies KW - technology KW - seismicity KW - explosions KW - earthquakes KW - interferometry KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506373?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+resolution+imagery+of+the+Source+Physics+Experiment+site+using+seismic+interferometry&rft.au=Matzel%2C+E%3BPitarka%2C+A&rft.aulast=Matzel&rft.aufirst=E&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 - attenuation; earthquakes; experimental studies; explosions; high-resolution methods; imagery; instruments; interferometry; seismicity; technology ER - TY - JOUR T1 - A spall model comparison with insights from the Source Physics Experiment AN - 1756506371; 2015-120516 JF - Seismological Research Letters AU - Ford, Sean R AU - Mellors, S J AU - Vorobiev, O Y 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 - models KW - experimental studies KW - three-dimensional models KW - explosions KW - geophysical methods KW - spallation KW - seismic methods KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506371?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+spall+model+comparison+with+insights+from+the+Source+Physics+Experiment&rft.au=Ford%2C+Sean+R%3BMellors%2C+S+J%3BVorobiev%2C+O+Y&rft.aulast=Ford&rft.aufirst=Sean&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 - 2016-09-16 N1 - SubjectsTermNotLitGenreText - experimental studies; explosions; geophysical methods; models; seismic methods; spallation; three-dimensional models ER - TY - JOUR T1 - Local distance application of P/S methods of discriminating explosions from earthquakes; how low can we go? AN - 1756506353; 2015-120517 JF - Seismological Research Letters AU - Walter, W R AU - Pyle, M L AU - Ford, Sean R AU - Pasyanos, M E Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 451 EP - 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 - attenuation KW - technology KW - seismicity KW - explosions KW - elastic waves KW - seismic waves KW - seismic sources 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/1756506353?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Local+distance+application+of+P%2FS+methods+of+discriminating+explosions+from+earthquakes%3B+how+low+can+we+go%3F&rft.au=Walter%2C+W+R%3BPyle%2C+M+L%3BFord%2C+Sean+R%3BPasyanos%2C+M+E&rft.aulast=Walter&rft.aufirst=W&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 - attenuation; body waves; earthquakes; elastic waves; explosions; P-waves; S-waves; seismic sources; seismic waves; seismicity; technology ER - TY - JOUR T1 - Using attenuation in ground motion prediction equations; validating improvements to strong ground motion predictions AN - 1752578983; 2016-000818 JF - Seismological Research Letters AU - Pasyanos, M E AU - Freymuller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 471 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - attenuation KW - strong motion KW - geologic hazards KW - seismic risk KW - natural hazards KW - ground motion KW - prediction KW - risk assessment KW - equations KW - simulation KW - earthquakes KW - 19:Seismology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578983?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Using+attenuation+in+ground+motion+prediction+equations%3B+validating+improvements+to+strong+ground+motion+predictions&rft.au=Pasyanos%2C+M+E%3BFreymuller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Pasyanos&rft.aufirst=M&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=471&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 - 2016-09-16 N1 - SubjectsTermNotLitGenreText - attenuation; earthquakes; equations; geologic hazards; ground motion; natural hazards; prediction; risk assessment; seismic risk; simulation; strong motion ER - TY - JOUR T1 - Comparison of empirical and model-based Matched Field Processing (MFP) earthquake detection techniques at the Newberry EGS Site AN - 1752578614; 2016-000895 JF - Seismological Research Letters AU - Templeton, D C AU - Matzel, E M AU - Harris, D B 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 - seismograms KW - technology KW - models KW - geothermal energy KW - Oregon KW - geothermal fields KW - Newberry Field KW - seismicity KW - synthetic seismograms KW - induced earthquakes KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578614?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Comparison+of+empirical+and+model-based+Matched+Field+Processing+%28MFP%29+earthquake+detection+techniques+at+the+Newberry+EGS+Site&rft.au=Templeton%2C+D+C%3BMatzel%2C+E+M%3BHarris%2C+D+B%3BFreymuller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Templeton&rft.aufirst=D&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 - 2016-09-16 N1 - SubjectsTermNotLitGenreText - earthquakes; geothermal energy; geothermal fields; induced earthquakes; models; Newberry Field; Oregon; seismicity; seismograms; synthetic seismograms; technology; United States ER - TY - JOUR T1 - Precision and accuracy of micro-seismic event locations AN - 1752578038; 2016-000892 JF - Seismological Research Letters AU - Myers, S C AU - Johannesson, G AU - Templeton, D C AU - Matzel, E M AU - Freymuller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 487 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - precision KW - seismic response KW - geothermal energy KW - Oregon KW - geothermal fields KW - fractures KW - Newberry Field KW - seismicity KW - induced earthquakes KW - earthquakes KW - accuracy KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578038?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Precision+and+accuracy+of+micro-seismic+event+locations&rft.au=Myers%2C+S+C%3BJohannesson%2C+G%3BTempleton%2C+D+C%3BMatzel%2C+E+M%3BFreymuller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Myers&rft.aufirst=S&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=487&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 - accuracy; earthquakes; fractures; geothermal energy; geothermal fields; induced earthquakes; Newberry Field; Oregon; precision; seismic response; seismicity; United States ER - TY - JOUR T1 - Comparison of 3D and 1D wave propagation modeling in the San Francisco Bay area AN - 1752577623; 2016-000813 JF - Seismological Research Letters AU - Pitakara, A AU - Rodgers, A J AU - Petersson, A AU - Sjogreen, B AU - Freymuller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 470 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 - one-dimensional models KW - Central California KW - magnitude KW - simulation KW - California KW - San Francisco Bay region KW - seismicity KW - Hayward Fault KW - ground motion KW - propagation KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577623?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Comparison+of+3D+and+1D+wave+propagation+modeling+in+the+San+Francisco+Bay+area&rft.au=Pitakara%2C+A%3BRodgers%2C+A+J%3BPetersson%2C+A%3BSjogreen%2C+B%3BFreymuller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Pitakara&rft.aufirst=A&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=470&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; Central California; earthquakes; ground motion; Hayward Fault; magnitude; one-dimensional models; propagation; San Francisco Bay region; seismicity; simulation; three-dimensional models; United States ER - TY - JOUR T1 - Two summation-by-parts finite difference codes for large scale simulations of seismic motion AN - 1752577485; 2016-000947 JF - Seismological Research Letters AU - Petersson, N A AU - Sjogreen, B AU - Rodgers, A J 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 - California KW - San Francisco Bay region KW - seismicity KW - finite difference analysis KW - Central California KW - ground motion KW - simulation KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577485?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Two+summation-by-parts+finite+difference+codes+for+large+scale+simulations+of+seismic+motion&rft.au=Petersson%2C+N+A%3BSjogreen%2C+B%3BRodgers%2C+A+J%3BFreymuller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Petersson&rft.aufirst=N&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 - California; Central California; earthquakes; finite difference analysis; ground motion; San Francisco Bay region; seismicity; simulation; United States ER - TY - JOUR T1 - Seismicity of Alaska 1973-2013; a well-constrained catalog of earthquake locations using multiple event relocation methods AN - 1752576847; 2016-000842 JF - Seismological Research Letters AU - Benz, H AU - Myers, S C AU - Johannesson, G AU - Bergman, E AU - Earle, P AU - Hayes, G AU - Freymuller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 476 EP - 477 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - geologic hazards KW - seismicity KW - seismic risk KW - statistical analysis KW - natural hazards KW - risk assessment KW - probability KW - Alaska KW - earthquakes KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576847?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Seismicity+of+Alaska+1973-2013%3B+a+well-constrained+catalog+of+earthquake+locations+using+multiple+event+relocation+methods&rft.au=Benz%2C+H%3BMyers%2C+S+C%3BJohannesson%2C+G%3BBergman%2C+E%3BEarle%2C+P%3BHayes%2C+G%3BFreymuller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Benz&rft.aufirst=H&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=476&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 - Alaska; earthquakes; geologic hazards; natural hazards; probability; risk assessment; seismic risk; seismicity; statistical analysis; United States ER - TY - JOUR T1 - Upper mantle S-wave velocity structure of the East Anatolian-Caucasus region AN - 1560086650; 2014-065908 AB - Geodynamic processes occurring in the upper mantle such as slab break off and lithosphere delamination often result in high rates of lithospheric deformation and rapid tectonic uplift of large areas. The continent-continent collision zone between Arabia and Eurasia has been widely studied in this context, but several different viable geodynamic models exist to explain the uplift and deformation of the Anatolian Plateau and the Caucasus Mountains. We have imaged the uppermost mantle shear wave velocity structure of the East Anatolian-Caucasus region using surface wave tomography to better understand the regional tectonic activity since the onset of the collision between the Arabian and Eurasian Plates. Furthermore, we used our tomographic models to better understand the processes, which are responsible for the formation of the 2 km high plateau and the widespread volcanism in eastern Turkey, as well as reactivation of deformation and deep seismicity in the eastern Greater Caucasus. Our model of regional upper mantle shear wave velocity structure supports subduction of the northern and southern branches of Neo-Tethys lithosphere between Eurasia and Gondwana and suggests a possible underthrusting of the Kura Basin lithosphere beneath the Greater Caucasus. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Tectonics AU - Skolbeltsyn, Gleb AU - Mellors, Robert AU - Gok, Rengin AU - Turkelli, Niyazi AU - Yetirmishli, Gurban AU - Sandvol, Eric Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 207 EP - 221 PB - American Geophysical Union, Washington, DC VL - 33 IS - 3 SN - 0278-7407, 0278-7407 KW - Tethys KW - eastern Anatolia KW - uplifts KW - mantle KW - Europe KW - elastic waves KW - Commonwealth of Independent States KW - eastern Turkey KW - volcanism KW - basins KW - Gondwana KW - tectonics KW - Caucasus KW - Asia KW - Middle East KW - upper mantle KW - body waves KW - Eurasian Plate KW - three-dimensional models KW - lithosphere KW - magmatism KW - Turkey KW - subduction KW - orogenic belts KW - deformation KW - reactivation KW - Arabian Plate KW - geodynamics KW - plate tectonics KW - delamination KW - basement tectonics KW - Anatolia KW - velocity structure KW - slabs KW - Greater Caucasus KW - seismic waves KW - S-waves KW - Kura Basin KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560086650?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Tectonics&rft.atitle=Upper+mantle+S-wave+velocity+structure+of+the+East+Anatolian-Caucasus+region&rft.au=Skolbeltsyn%2C+Gleb%3BMellors%2C+Robert%3BGok%2C+Rengin%3BTurkelli%2C+Niyazi%3BYetirmishli%2C+Gurban%3BSandvol%2C+Eric&rft.aulast=Skolbeltsyn&rft.aufirst=Gleb&rft.date=2014-03-01&rft.volume=33&rft.issue=3&rft.spage=207&rft.isbn=&rft.btitle=&rft.title=Tectonics&rft.issn=02787407&rft_id=info:doi/10.1002%2F2013TC003334 L2 - http://www.agu.org/journals/tc/ 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 - 65 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2014-09-05 N1 - CODEN - TCTNDM N1 - SubjectsTermNotLitGenreText - Anatolia; Arabian Plate; Asia; basement tectonics; basins; body waves; Caucasus; Commonwealth of Independent States; deformation; delamination; eastern Anatolia; eastern Turkey; elastic waves; Eurasian Plate; Europe; geodynamics; Gondwana; Greater Caucasus; Kura Basin; lithosphere; magmatism; mantle; Middle East; orogenic belts; plate tectonics; reactivation; S-waves; seismic waves; slabs; subduction; tectonics; Tethys; three-dimensional models; Turkey; uplifts; upper mantle; velocity structure; volcanism DO - http://dx.doi.org/10.1002/2013TC003334 ER - TY - JOUR T1 - Seismic source characteristics of nuclear and chemical explosions in granite from hydrodynamic simulations AN - 1542643836; 2014-046994 AB - Seismic source characteristics of low-yield (0.5-5 kt) underground explosions are inferred from hydrodynamic simulations using a granite material model on high-performance (parallel) computers. We use a non-linear rheological model for granite calibrated to historical near-field nuclear test data. Equivalent elastic P-wave source spectra are derived from the simulated hydrodynamic response using reduced velocity potentials. Source spectra and parameters are compared with the models of Mueller and Murphy (Bull Seism Soc Am 61:1675-1692, 1971, hereafter MM71) and Denny and Johnson (Explosion source phenomenology, pp 1-24, 1991, hereafter DJ91). The source spectra inferred from the simulations of different yields at normal scaled depth-of-burial (SDOB) match the MM71 spectra reasonably well. For normally buried nuclear explosions, seismic moments are larger for the hydrodynamic simulations than MM71 (by 25 %) and for DJ91 (by over a factor of 2), however, the scaling of moment with yield across this low-yield range is consistent for our calculations and the two models. Spectra from our simulations show higher corner frequencies at the lower end of the 0.5-5.0 kt yield range and stronger variation with yield than the MM71 and DJ91 models predict. The spectra from our simulations have additional energy above the corner frequency, probably related to non-linear near-source effects, but at high frequencies the spectral slopes agree with the f (super -2) predictions of MM71. Simulations of nuclear explosions for a range of SDOB from 0.5 to 3.9 show stronger variations in the seismic moment than predicted by the MM71 and DJ91 models. Chemical explosions are found to generate higher moments by a factor of about two compared to nuclear explosions of the same yield in granite and at normal depth-of-burial, broadly consistent with comparisons of nuclear and chemical shots at the US Nevada Test Site (Denny, Proceeding of symposium on the non-proliferation experiment, Rockville, Maryland, 1994). For all buried explosions, the region of permanent deformation and material damage is not spherical but extends along the free surface above and away from the source. The effect of damage induced by a normally buried nuclear explosion on seismic radiation is explored by comparing the motions from hydrodynamic simulations with those for point-source elastic Green's functions. Results show that radiation emerging at downward takeoff angles appears to be dominated by the expected isotropic source contribution, while at shallower angles the motions are complicated by near-surface damage and cannot be represented with the addition of a simple secondary compensated linear vector dipole point source above the shot point. The agreement and differences of simulated source spectra with the MM71 and DJ91 models motivates the use of numerical simulations to understand observed motions and investigate seismic source features for underground explosions in various emplacement media and conditions, including non-linear rheological effects such as material strength and porosity. Copyright 2012 Springer Basel JF - Pure and Applied Geophysics AU - Xu, Heming AU - Rodgers, Arthur J AU - Lomov, Ilya N AU - Vorobiev, Oleg Y Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 507 EP - 521 PB - Birkhaeuser, Basel VL - 171 IS - 3-5 SN - 0033-4553, 0033-4553 KW - P-waves KW - body waves KW - shock waves KW - explosions KW - seismic moment KW - igneous rocks KW - chemical explosions KW - granites KW - data processing KW - damage KW - elastic waves KW - seismic sources KW - simulation KW - depth KW - scale models KW - plutonic rocks KW - near-field KW - parallel processing KW - hydrodynamics KW - seismic waves KW - nuclear explosions KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643836?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Seismic+source+characteristics+of+nuclear+and+chemical+explosions+in+granite+from+hydrodynamic+simulations&rft.au=Xu%2C+Heming%3BRodgers%2C+Arthur+J%3BLomov%2C+Ilya+N%3BVorobiev%2C+Oleg+Y&rft.aulast=Xu&rft.aufirst=Heming&rft.date=2014-03-01&rft.volume=171&rft.issue=3-5&rft.spage=507&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-012-0623-0 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 - 40 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-07-04 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - body waves; chemical explosions; damage; data processing; depth; earthquakes; elastic waves; explosions; granites; hydrodynamics; igneous rocks; near-field; nuclear explosions; P-waves; parallel processing; plutonic rocks; scale models; seismic moment; seismic sources; seismic waves; shock waves; simulation DO - http://dx.doi.org/10.1007/s00024-012-0623-0 ER - TY - JOUR T1 - Detection of noble gas radionuclides from an underground nuclear explosion during a CTBT on-site inspection AN - 1542643426; 2014-047010 AB - The development of a technically sound approach to detecting the subsurface release of noble gas radionuclides is a critical component of the on-site inspection (OSI) protocol under the Comprehensive Nuclear Test Ban Treaty. In this context, we are investigating a variety of technical challenges that have a significant bearing on policy development and technical guidance regarding the detection of noble gases and the creation of a technically justifiable OSI concept of operation. The work focuses on optimizing the ability to capture radioactive noble gases subject to the constraints of possible OSI scenarios. This focus results from recognizing the difficulty of detecting gas releases in geologic environments-a lesson we learned previously from the non-proliferation experiment (NPE). Most of our evaluations of a sampling or transport issue necessarily involve computer simulations. This is partly due to the lack of OSI-relevant field data, such as that provided by the NPE, and partly a result of the ability of computer-based models to test a range of geologic and atmospheric scenarios far beyond what could ever be studied by field experiments, making this approach very highly cost effective. We review some highlights of the transport and sampling issues we have investigated and complete the discussion of these issues with a description of a preliminary design for subsurface sampling that addresses some of the sampling challenges discussed here. Copyright 2014 Springer Basel and 2012 Springer Basel AG JF - Pure and Applied Geophysics AU - Carrigan, Charles R AU - Sun, Yunwei Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 717 EP - 734 PB - Birkhaeuser, Basel VL - 171 IS - 3-5 SN - 0033-4553, 0033-4553 KW - isotopes KW - radioactivity KW - on-site inspection KW - radon KW - simulation KW - Ar-37 KW - fractures KW - radioactive isotopes KW - transport KW - sampling KW - noble gases KW - background radiation KW - sediments KW - nuclear explosions KW - explosions KW - clastic sediments KW - atmosphere KW - depth KW - argon KW - detection KW - policy KW - alluvium KW - soil gases KW - permeability KW - Comprehensive Test Ban Treaty KW - 19:Seismology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643426?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Detection+of+noble+gas+radionuclides+from+an+underground+nuclear+explosion+during+a+CTBT+on-site+inspection&rft.au=Carrigan%2C+Charles+R%3BSun%2C+Yunwei&rft.aulast=Carrigan&rft.aufirst=Charles&rft.date=2014-03-01&rft.volume=171&rft.issue=3-5&rft.spage=717&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-012-0563-8 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 - 25 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-07-04 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - alluvium; Ar-37; argon; atmosphere; background radiation; clastic sediments; Comprehensive Test Ban Treaty; depth; detection; explosions; fractures; isotopes; noble gases; nuclear explosions; on-site inspection; permeability; policy; radioactive isotopes; radioactivity; radon; sampling; sediments; simulation; soil gases; transport DO - http://dx.doi.org/10.1007/s00024-012-0563-8 ER - TY - JOUR T1 - Overhead detection of underground nuclear explosions by multi-spectral and infrared imaging AN - 1542643384; 2014-047013 AB - The Comprehensive Nuclear Test Ban Treaty allows for Multi-Spectral and Infrared Imaging from an aircraft and on the ground to help reduce the search area for an underground nuclear explosion from the initial 1,000 km (super 2) . Satellite data, primarily from Landsat, have been used as a surrogate for aircraft data to investigate whether there are any multi-spectral features associated with the nuclear tests in Pakistan, India or North Korea. It is shown that there are multi-spectral observables on the ground that can be associated with the nominal surface ground zero for at least some of these explosions, and that these are likely to be found by measurements allowed by the treaty. Copyright 2014 Springer Basel and 2012 Springer (outside the USA) JF - Pure and Applied Geophysics AU - Henderson, John R AU - Smith, Milton O AU - Zelinski, Michael E Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 763 EP - 777 PB - Birkhaeuser, Basel VL - 171 IS - 3-5 SN - 0033-4553, 0033-4553 KW - thematic mapper KW - imagery KW - Pakistan KW - Far East KW - explosions KW - North Korea KW - on-site inspection KW - Korea KW - satellite methods KW - depth KW - infrared spectra KW - India KW - multispectral analysis KW - Landsat KW - detection KW - Indian Peninsula KW - spectra KW - algorithms KW - nuclear explosions KW - Asia KW - remote sensing KW - Comprehensive Test Ban Treaty KW - airborne methods KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643384?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Overhead+detection+of+underground+nuclear+explosions+by+multi-spectral+and+infrared+imaging&rft.au=Henderson%2C+John+R%3BSmith%2C+Milton+O%3BZelinski%2C+Michael+E&rft.aulast=Henderson&rft.aufirst=John&rft.date=2014-03-01&rft.volume=171&rft.issue=3-5&rft.spage=763&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-012-0574-5 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 - 33 N1 - Document feature - illus. N1 - Last updated - 2014-07-04 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - airborne methods; algorithms; Asia; Comprehensive Test Ban Treaty; depth; detection; explosions; Far East; imagery; India; Indian Peninsula; infrared spectra; Korea; Landsat; multispectral analysis; North Korea; nuclear explosions; on-site inspection; Pakistan; remote sensing; satellite methods; spectra; thematic mapper DO - http://dx.doi.org/10.1007/s00024-012-0574-5 ER - TY - JOUR T1 - Testing event discrimination over broad regions using the historical Borovoye Observatory explosion dataset AN - 1542642416; 2014-046995 AB - We test the performance of high-frequency regional P/S discriminants to differentiate between earthquakes and explosions at test sites and over broad regions using a historical dataset of explosions recorded at the Borovoye Observatory in Kazakhstan. We compare these explosions to modern recordings of earthquakes at the same location. We then evaluate the separation of the two types of events using the raw measurements and those where the amplitudes are corrected for 1-D and 2-D attenuation structure. We find that high-frequency P/S amplitudes can reliably identify earthquakes and explosions, and that the discriminant is applicable over broad regions as long as propagation effects are properly accounted for. Lateral attenuation corrections provide the largest improvement in the 2-4 Hz band, the use of which may successfully enable the identification of smaller, distant events that have lower signal-to-noise at higher frequencies. We also find variations in P/S ratios among the three main nuclear testing locations within the Semipalatinsk Test Site which, due to their nearly identical paths to BRVK, must be a function of differing geology and emplacement conditions. Copyright 2014 Springer Basel and 2012 Springer Basel AG JF - Pure and Applied Geophysics AU - Pasyanos, Michael E AU - Ford, Sean R AU - Walter, William R Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 523 EP - 535 PB - Birkhaeuser, Basel VL - 171 IS - 3-5 SN - 0033-4553, 0033-4553 KW - P-waves KW - Pn-waves KW - elastic waves KW - frequency KW - Sn-waves KW - Central Asia KW - attenuation KW - spatial variations KW - Commonwealth of Independent States KW - propagation KW - nuclear explosions KW - Asia KW - body waves KW - monitoring KW - explosions KW - two-dimensional models KW - identification KW - signal-to-noise ratio KW - lateral heterogeneity KW - Kazakhstan KW - seismic waves KW - earthquakes KW - S-waves KW - Borovoye Observatory KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542642416?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Testing+event+discrimination+over+broad+regions+using+the+historical+Borovoye+Observatory+explosion+dataset&rft.au=Pasyanos%2C+Michael+E%3BFord%2C+Sean+R%3BWalter%2C+William+R&rft.aulast=Pasyanos&rft.aufirst=Michael&rft.date=2014-03-01&rft.volume=171&rft.issue=3-5&rft.spage=523&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-012-0591-4 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 - amplitude; Asia; attenuation; body waves; Borovoye Observatory; Central Asia; Commonwealth of Independent States; earthquakes; elastic waves; explosions; frequency; identification; Kazakhstan; lateral heterogeneity; monitoring; nuclear explosions; P-waves; Pn-waves; propagation; S-waves; seismic waves; signal-to-noise ratio; Sn-waves; spatial variations; two-dimensional models DO - http://dx.doi.org/10.1007/s00024-012-0591-4 ER - TY - JOUR T1 - Modeling noble gas transport and detection for the Comprehensive Nuclear-Test-Ban Treaty AN - 1542642339; 2014-047011 AB - Detonation gases released by an underground nuclear test include trace amounts of (super 133) Xe and (super 37) Ar. In the context of the Comprehensive Nuclear Test Ban Treaty, On Site Inspection Protocol, such gases released from or sampled at the soil surface could be used to indicate the occurrence of an explosion in violation of the treaty. To better estimate the levels of detectability from an underground nuclear test (UNE), we developed mathematical models to evaluate the processes of (super 133) Xe and (super 37) Ar transport in fractured rock. Two models are developed respectively for representing thermal and isothermal transport. When the thermal process becomes minor under the condition of low temperature and low liquid saturation, the subsurface system is described using an isothermal and single-gas-phase transport model and barometric pumping becomes the major driving force to deliver (super 133) Xe and (super 37) Ar to the ground surface. A thermal test is simulated using a nonisothermal and two-phase transport model. In the model, steam production and bubble expansion are the major processes driving noble gas components to ground surface. After the temperature in the chimney drops below boiling, barometric pumping takes over the role as the major transport process. Copyright 2014 Springer Basel and 2012 Springer Basel AG JF - Pure and Applied Geophysics AU - Sun, Yunwei AU - Carrigan, Charles R Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 735 EP - 750 PB - Birkhaeuser, Basel VL - 171 IS - 3-5 SN - 0033-4553, 0033-4553 KW - fractured materials KW - expansion KW - isotopes KW - on-site inspection KW - simulation KW - Ar-37 KW - temperature KW - radioactive isotopes KW - transport KW - sampling KW - noble gases KW - sediments KW - Xe-133 KW - nuclear explosions KW - diffusivity KW - soils KW - two-phase models KW - pressure KW - explosions KW - clastic sediments KW - bubbles KW - mathematical models KW - xenon KW - depth KW - gases KW - argon KW - models KW - detection KW - boiling KW - theoretical models KW - alluvium KW - permeability KW - Comprehensive Test Ban Treaty KW - 19:Seismology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542642339?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Modeling+noble+gas+transport+and+detection+for+the+Comprehensive+Nuclear-Test-Ban+Treaty&rft.au=Sun%2C+Yunwei%3BCarrigan%2C+Charles+R&rft.aulast=Sun&rft.aufirst=Yunwei&rft.date=2014-03-01&rft.volume=171&rft.issue=3-5&rft.spage=735&rft.isbn=&rft.btitle=&rft.title=Pure+and+Applied+Geophysics&rft.issn=00334553&rft_id=info:doi/10.1007%2Fs00024-012-0514-4 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 - 39 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-07-04 N1 - CODEN - PAGYAV N1 - SubjectsTermNotLitGenreText - alluvium; Ar-37; argon; boiling; bubbles; clastic sediments; Comprehensive Test Ban Treaty; depth; detection; diffusivity; expansion; explosions; fractured materials; gases; isotopes; mathematical models; models; noble gases; nuclear explosions; on-site inspection; permeability; pressure; radioactive isotopes; sampling; sediments; simulation; soils; temperature; theoretical models; transport; two-phase models; Xe-133; xenon DO - http://dx.doi.org/10.1007/s00024-012-0514-4 ER - TY - JOUR T1 - Holocene rockfalls in the southern Negev Desert, Israel and their relation to Dead Sea Fault earthquakes AN - 1535205469; 2014-038942 AB - Rockfall ages in tectonically active regions provide information regarding frequency and magnitude of earthquakes. In the hyper-arid environment of the Dead Sea fault (DSF), southern Israel, rockfalls are most probably triggered by earthquakes. We dated rockfalls along the western margin of the DSF using terrestrial cosmogenic nuclides (TCN). At each rockfall site, samples were collected from simultaneously exposed conjugate boulders and cliff surfaces. Such conjugate samples initially had identical pre-fall ("inherited") TCN concentrations. After boulder detachment, these surfaces were dosed by different production rates due to differences in post-fall shielding and geometry. However, in our study area, pre-rockfall inheritance and post-rockfall production rates of TCN cannot be evaluated. Therefore, we developed a numerical approach and demonstrated a way to overcome the above-mentioned problems. This approach can be applied in other settings where rockfalls cannot be dated by simple exposure dating. Results suggest rockfall ages between 3.6+ or -0.8 and 4.7+ or -0.7 ka. OSL ages of sediment accumulated behind the boulders range between 0.6+ or -0.1 and 3.4+ or -1.4 ka and support the TCN results. Our ages agree with dated earthquakes determined in paleoseismic studies along the entire length of the DSF and support the observation of intensive earthquake activity around 4-5 ka. Abstract Copyright (2014) Elsevier, B.V. JF - Quaternary Research AU - Rinat, Yair AU - Matmon, Ari AU - Arnold, Maurice AU - Aumaitre, Georges AU - Bourles, Didier AU - Keddadouche, Karim AU - Porat, Naomi AU - Morin, Efrat AU - Finkel, Robert C Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 260 EP - 273 PB - Elsevier, New York, NY VL - 81 IS - 2 SN - 0033-5894, 0033-5894 KW - relative age KW - paleoseismicity KW - isotopes KW - Israel KW - Holocene KW - exposure age KW - Cenozoic KW - radioactive isotopes KW - optically stimulated luminescence KW - dates KW - mass movements KW - sediments KW - absolute age KW - Negev KW - Asia KW - Middle East KW - faults KW - rockfalls KW - alkaline earth metals KW - southern Negev KW - boulders KW - Quaternary KW - Dead Sea Fault KW - Be-10 KW - clastic sediments KW - metals KW - earthquakes KW - beryllium KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535205469?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Research&rft.atitle=Holocene+rockfalls+in+the+southern+Negev+Desert%2C+Israel+and+their+relation+to+Dead+Sea+Fault+earthquakes&rft.au=Rinat%2C+Yair%3BMatmon%2C+Ari%3BArnold%2C+Maurice%3BAumaitre%2C+Georges%3BBourles%2C+Didier%3BKeddadouche%2C+Karim%3BPorat%2C+Naomi%3BMorin%2C+Efrat%3BFinkel%2C+Robert+C&rft.aulast=Rinat&rft.aufirst=Yair&rft.date=2014-03-01&rft.volume=81&rft.issue=2&rft.spage=260&rft.isbn=&rft.btitle=&rft.title=Quaternary+Research&rft.issn=00335894&rft_id=info:doi/10.1016%2Fj.yqres.2013.12.008 L2 - http://www.sciencedirect.com/science/journal/00335894 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 - 84 N1 - PubXState - NY N1 - Document feature - illus. incl. sect., 3 tables, sketch map N1 - Last updated - 2014-06-13 N1 - CODEN - QRESAV N1 - SubjectsTermNotLitGenreText - absolute age; alkaline earth metals; Asia; Be-10; beryllium; boulders; Cenozoic; clastic sediments; dates; Dead Sea Fault; earthquakes; exposure age; faults; Holocene; isotopes; Israel; mass movements; metals; Middle East; Negev; optically stimulated luminescence; paleoseismicity; Quaternary; radioactive isotopes; relative age; rockfalls; sediments; southern Negev DO - http://dx.doi.org/10.1016/j.yqres.2013.12.008 ER - TY - JOUR T1 - LITHO1.0; an updated crust and lithospheric model of the Earth AN - 1535204898; 2014-039040 AB - We present the LITHO1.0 model, which is a 1 degrees tessellated model of the crust and uppermost mantle of the Earth, extending into the upper mantle to include the lithospheric lid and underlying asthenosphere. The model is parameterized laterally by tessellated nodes and vertically as a series of geophysically identified layers, such as water, ice, sediments, crystalline crust, lithospheric lid, and asthenosphere. LITHO1.0 is created by constructing an appropriate starting model and perturbing it to fit high-resolution surface wave dispersion maps (Love and Rayleigh, group and phase) over a wide frequency band (5-40 mHz). We examine and discuss the model with respect to key lithospheric parameters, such as average crustal velocity, crustal thickness, upper mantle velocity, and lithospheric thickness. We then compare the constructed model to those from a number of select studies at regional and global scales and find general consistency. It appears that LITHO1.0 represents a reasonable starting model of the Earth's shallow structure (crust and uppermost mantle) for the purposes in which these models are used, such as traveltime tomography or in efforts to create a 3-D reference Earth model. The model matches surface wave dispersion over a frequency band wider than the band used in the inversion. There are several avenues for improving the model in the future by including attenuation and anisotropy, as well as making use of surface waves at higher frequency. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Pasyanos, Michael E AU - Masters, T Guy AU - Laske, Gabi AU - Ma, Zhitu Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 2153 EP - 2173 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 3 SN - 2169-9313, 2169-9313 KW - crustal thickening KW - upper mantle KW - numerical models KW - three-dimensional models KW - lithosphere KW - data processing KW - mantle KW - asthenosphere KW - LITHO1.0 KW - velocity structure KW - thickness KW - lower crust KW - crust KW - anisotropy KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535204898?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=LITHO1.0%3B+an+updated+crust+and+lithospheric+model+of+the+Earth&rft.au=Pasyanos%2C+Michael+E%3BMasters%2C+T+Guy%3BLaske%2C+Gabi%3BMa%2C+Zhitu&rft.aulast=Pasyanos&rft.aufirst=Michael&rft.date=2014-03-01&rft.volume=119&rft.issue=3&rft.spage=2153&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2013JB010626 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 - 45 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - anisotropy; asthenosphere; crust; crustal thickening; data processing; LITHO1.0; lithosphere; lower crust; mantle; numerical models; thickness; three-dimensional models; upper mantle; velocity structure DO - http://dx.doi.org/10.1002/2013JB010626 ER - TY - JOUR T1 - A geophysical perspective of value of information: examples of spatial decisions for groundwater sustainability AN - 1534833343; 19354931 AB - The value of information (VOI) can be used to determine what kind of spatial information maybe relevant and useful for groundwater sustainability decisions. In this paper, the unique challenges for applying VoI to spatial information from geophysical data are described. The uncertainty regarding the spatial structure or continuity of the subsurface properties can be described with geostatistical sample models. Using these models, one can quantify the prior value given our present state of uncertainty and a set of decision alternatives and outcomes. Because geophysical techniques are a type of remote-sensing data, assuming "perfect" information is not realistic since the techniques usually are indirectly sampling the aquifer properties. Therefore, the focus of this paper is describing how the data reliability (the measure of imperfectness) can be quantified. One of the foremost considerations is the non-unique relationship between geological parameters (which determine groundwater flow) and geophysical observables (what determines the response of the technique). Another is to have the information in a form such that it is useful for spatial decisions. This will often require inversion and interpretation of the geophysical data. Inversion reconstructs an image of the subsurface from the raw geophysical data. How closely the image reproduces the true subsurface structure or property of interest depends on the particular technique's resolution, depth of investigation and sensor locations. Lastly, in some cases, interpretation of the geophysical data or inversion will be necessary to link the data to the variables that determine the outcome of the decision. Three examples are provided that illustrate different approaches and methods for addressing these challenges. In the examples, time-domain electromagnetic and electrical resistivity techniques are evaluated for their ability to assist in spatial decisions for aquifer management. The examples considered address these three situations: aquifer vulnerability to surface-borne contaminants, managed aquifer recharge and CO sub(2)/brine leakage (related to CO sub(2) geologic sequestration activities). The methods presented here are transferable to other subsurface sciences and decisions that involve risk. Recent work has been applied to geothermal well-siting using electromagnetic techniques. These approaches can also be applied for oil and mining spatial decisions, and they offer advantages over previous VOI work done for oil applications: they explicitly include the geologic uncertainty modeling and simulate the physics of the considered geophysical technique. JF - Environment Systems & Decisions AU - Trainor-Guitton, Whitney J AD - Lawrence Livermore National Laboratory, Livermore, CA, USA, trainorguitton@llnl.gov Y1 - 2014/03// PY - 2014 DA - Mar 2014 SP - 124 EP - 133 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 34 IS - 1 SN - 2194-5403, 2194-5403 KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; Risk Abstracts; Pollution Abstracts; Environment Abstracts; Sustainability Science Abstracts KW - Aquifers KW - Sensors KW - Electrical resistivity KW - Groundwater Pollution KW - Oil KW - Geology KW - Sampling KW - Vulnerability KW - Geophysics KW - Aquifer flow KW - Leakage KW - Groundwater flow KW - Sustainability KW - Inversions KW - Model Studies KW - Inversion KW - Aquifer recharge KW - Geohydrology KW - Groundwater pollution KW - Carbon dioxide KW - Groundwater KW - Carbon Dioxide KW - AQ 00001:Water Resources and Supplies KW - SW 5040:Data acquisition KW - M3 1010:Issues in Sustainable Development KW - P 2000:FRESHWATER POLLUTION KW - M2 556.34:Groundwater Flow (556.34) KW - R2 23010:General: Models, forecasting KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1534833343?accountid=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=Environment+Systems+%26+Decisions&rft.atitle=A+geophysical+perspective+of+value+of+information%3A+examples+of+spatial+decisions+for+groundwater+sustainability&rft.au=Trainor-Guitton%2C+Whitney+J&rft.aulast=Trainor-Guitton&rft.aufirst=Whitney&rft.date=2014-03-01&rft.volume=34&rft.issue=1&rft.spage=124&rft.isbn=&rft.btitle=&rft.title=Environment+Systems+%26+Decisions&rft.issn=21945403&rft_id=info:doi/10.1007%2Fs10669-013-9487-9 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 47 N1 - Last updated - 2015-08-19 N1 - SubjectsTermNotLitGenreText - Aquifers; Aquifer recharge; Groundwater flow; Aquifer flow; Inversions; Leakage; Sensors; Electrical resistivity; Sustainability; Oil; Inversion; Groundwater pollution; Geology; Geophysics; Vulnerability; Groundwater; Carbon dioxide; Geohydrology; Groundwater Pollution; Sampling; Carbon Dioxide; Model Studies DO - http://dx.doi.org/10.1007/s10669-013-9487-9 ER - TY - JOUR T1 - Statistical significance of climate sensitivity predictors obtained by data mining AN - 1524403496; 19625472 AB - Several recent efforts to estimate Earth's equilibrium climate sensitivity (ECS) focus on identifying quantities in the current climate which are skillful predictors of ECS yet can be constrained by observations. This study automates the search for observable predictors using data from phase 5 of the Coupled Model Intercomparison Project. The primary focus of this paper is assessing statistical significance of the resulting predictive relationships. Failure to account for dependence between models, variables, locations, and seasons is shown to yield misleading results. A new technique for testing the field significance of data-mined correlations which avoids these problems is presented. Using this new approach, all 41,741 relationships we tested were found to be explainable by chance. This leads us to conclude that data mining is best used to identify potential relationships which are then validated or discarded using physically based hypothesis testing. Key Points * Correlation magnitude is not sufficient proof of predictive skill * Significance testing is complicated by model nonindependence in ensembles * The best predictors of climate change are related to the Southern Ocean JF - Geophysical Research Letters AU - Caldwell, Peter M AU - Bretherton, Christopher S AU - Zelinka, Mark D AU - Klein, Stephen A AU - Santer, Benjamin D AU - Sanderson, Benjamin M AD - Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 1803 EP - 1808 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 41 IS - 5 SN - 0094-8276, 0094-8276 KW - Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts KW - data mining KW - climate sensitivity KW - CMIP KW - intercomparison KW - ensemble KW - Sensitivity KW - Climate models KW - Oceans KW - Climate sensitivity KW - Climate change KW - Statistical analysis KW - Correlations KW - PS, Antarctic Ocean KW - Seasonal variability KW - Atmospheric circulation-oceanic circulation coupled models KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524403496?accountid=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=Statistical+significance+of+climate+sensitivity+predictors+obtained+by+data+mining&rft.au=Caldwell%2C+Peter+M%3BBretherton%2C+Christopher+S%3BZelinka%2C+Mark+D%3BKlein%2C+Stephen+A%3BSanter%2C+Benjamin+D%3BSanderson%2C+Benjamin+M&rft.aulast=Caldwell&rft.aufirst=Peter&rft.date=2014-03-01&rft.volume=41&rft.issue=5&rft.spage=1803&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL059205 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Climate models; Climate sensitivity; Climate change; Correlations; Statistical analysis; Seasonal variability; Atmospheric circulation-oceanic circulation coupled models; Sensitivity; Oceans; PS, Antarctic Ocean DO - http://dx.doi.org/10.1002/2014GL059205 ER - TY - JOUR T1 - Volcanic contribution to decadal changes in tropospheric temperature AN - 1520105139; 2014-028664 JF - Nature Geoscience AU - Santer, Benjamin D AU - Bonfils, Celine AU - Painter, Jeffrey F AU - Zelinka, Mark D AU - Mears, Carl AU - Solomon, Susan AU - Schmidt, Gavin A AU - Fyfe, John C AU - Cole, Jason N S AU - Nazarenko, Larissa AU - Taylor, Karl E AU - Wentz, Frank J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 185 EP - 189 PB - Nature Publishing Group, London VL - 7 IS - 3 SN - 1752-0894, 1752-0894 KW - decadal variations KW - Luzon KW - Far East KW - statistical analysis KW - troposphere KW - simulation KW - satellite methods KW - temperature KW - models KW - Mount Pinatubo KW - Philippine Islands KW - volcanism KW - eruptions KW - volcanoes KW - Asia KW - remote sensing KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520105139?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Volcanic+contribution+to+decadal+changes+in+tropospheric+temperature&rft.au=Santer%2C+Benjamin+D%3BBonfils%2C+Celine%3BPainter%2C+Jeffrey+F%3BZelinka%2C+Mark+D%3BMears%2C+Carl%3BSolomon%2C+Susan%3BSchmidt%2C+Gavin+A%3BFyfe%2C+John+C%3BCole%2C+Jason+N+S%3BNazarenko%2C+Larissa%3BTaylor%2C+Karl+E%3BWentz%2C+Frank+J&rft.aulast=Santer&rft.aufirst=Benjamin&rft.date=2014-03-01&rft.volume=7&rft.issue=3&rft.spage=185&rft.isbn=&rft.btitle=&rft.title=Nature+Geoscience&rft.issn=17520894&rft_id=info:doi/10.1038%2FNGEO2098 L2 - http://www.nature.com/ngeo/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 30 N1 - Document feature - illus. N1 - Last updated - 2014-05-01 N1 - SubjectsTermNotLitGenreText - Asia; decadal variations; eruptions; Far East; Luzon; models; Mount Pinatubo; Philippine Islands; remote sensing; satellite methods; simulation; statistical analysis; temperature; troposphere; volcanism; volcanoes DO - http://dx.doi.org/10.1038/NGEO2098 ER - TY - JOUR T1 - Insights into the Martian mantle; the age and isotopics of the meteorite fall Tissint AN - 1520103711; 2014-028657 AB - The recent witnessed fall of the meteorite Tissint represents the delivery of a pristine new sample from the surface of Mars. This meteorite provides an unprecedented opportunity to study a variety of aspects about the planet's evolution. Using the Rb-Sr and Sm-Nd isotopic systems, we determined that Tissint, a depleted shergottite, has a crystallization age of 574 + or - 20 Ma, an initial epsilon (super 143) Nd = +42.2 + or - 0.5, and an initial (super 87) Sr/ (super 86) Sr = 0.700760 + or - 11. These initial Nd and Sr isotopic compositions suggest that Tissint originated from a mantle source on Mars that is distinct from the source reservoirs of the other Martian meteorites. The known crystallization ages, geochemical characteristics, ejection ages, and ejection dynamics of Tissint and other similarly grouped Martian meteorites suggest that they are likely derived from a source crater up to approximately 90 km in diameter with an age of approximately 1 Ma that is located on terrain that is approximately 600 million years old. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Brennecka, G A AU - Borg, Lars E AU - Wadhwa, M Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 412 EP - 418 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 3 SN - 1086-9379, 1086-9379 KW - stony meteorites KW - isotopes KW - Martian meteorites KW - thermal ionization mass spectra KW - mass spectra KW - mantle KW - Mars KW - stable isotopes KW - Rb/Sr KW - SNC Meteorites KW - meteorites KW - dates KW - absolute age KW - spectra KW - rare earths KW - alkaline earth metals KW - isotope ratios KW - achondrites KW - meteorite falls KW - terrestrial planets KW - Nd-144/Nd-143 KW - Sr-87/Sr-86 KW - planets KW - Tissint Meteorite KW - shergottite KW - Sm/Nd KW - metals KW - neodymium KW - strontium KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520103711?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Insights+into+the+Martian+mantle%3B+the+age+and+isotopics+of+the+meteorite+fall+Tissint&rft.au=Brennecka%2C+G+A%3BBorg%2C+Lars+E%3BWadhwa%2C+M&rft.aulast=Brennecka&rft.aufirst=G&rft.date=2014-03-01&rft.volume=49&rft.issue=3&rft.spage=412&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12258 L2 - http://cavern.uark.edu/~meteor/ 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 - 25 N1 - PubXState - AR N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-05-01 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; alkaline earth metals; dates; isotope ratios; isotopes; mantle; Mars; Martian meteorites; mass spectra; metals; meteorite falls; meteorites; Nd-144/Nd-143; neodymium; planets; rare earths; Rb/Sr; shergottite; Sm/Nd; SNC Meteorites; spectra; Sr-87/Sr-86; stable isotopes; stony meteorites; strontium; terrestrial planets; thermal ionization mass spectra; Tissint Meteorite DO - http://dx.doi.org/10.1111/maps.12258 ER - TY - JOUR T1 - Rapid thinning of Pine Island Glacier in the early Holocene AN - 1520105094; 2014-030340 AB - Pine Island Glacier, a major outlet of the West Antarctic Ice Sheet, has been undergoing rapid thinning and retreat for the past two decades. We demonstrate, using glacial-geological and geochronological data, that Pine Island Glacier (PIG) also experienced rapid thinning during the early Holocene, around 8000 years ago. Cosmogenic (super 10) Be concentrations in glacially transported rocks show that this thinning was sustained for decades to centuries at an average rate of more than 100 centimeters per year, which is comparable with contemporary thinning rates. The most likely mechanism was a reduction in ice shelf buttressing. Our findings reveal that PIG has experienced rapid thinning at least once in the past and that, once set in motion, rapid ice sheet changes in this region can persist for centuries. JF - Science AU - Johnson, J S AU - Bentley, M J AU - Smith, J A AU - Finkel, R C AU - Rood, D H AU - Gohl, K AU - Balco, G AU - Larter, R D AU - Schaefer, J M Y1 - 2014/02/28/ PY - 2014 DA - 2014 Feb 28 SP - 999 EP - 1001 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6174 SN - 0036-8075, 0036-8075 KW - relative age KW - lower Holocene KW - isotopes KW - paleoclimatology KW - Holocene KW - deglaciation KW - Cenozoic KW - radioactive isotopes KW - melting KW - geochronology KW - dynamics KW - mass balance KW - West Antarctic ice sheet KW - thickness KW - Pine Island Glacier KW - alkaline earth metals KW - Quaternary KW - Be-10 KW - glaciers KW - rates KW - Antarctic ice sheet KW - Antarctica KW - metals KW - beryllium KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520105094?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Rapid+thinning+of+Pine+Island+Glacier+in+the+early+Holocene&rft.au=Johnson%2C+J+S%3BBentley%2C+M+J%3BSmith%2C+J+A%3BFinkel%2C+R+C%3BRood%2C+D+H%3BGohl%2C+K%3BBalco%2C+G%3BLarter%2C+R+D%3BSchaefer%2C+J+M&rft.aulast=Johnson&rft.aufirst=J&rft.date=2014-02-28&rft.volume=343&rft.issue=6174&rft.spage=999&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1247385 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 - 31 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Antarctic ice sheet; Antarctica; Be-10; beryllium; Cenozoic; deglaciation; dynamics; geochronology; glaciers; Holocene; isotopes; lower Holocene; mass balance; melting; metals; paleoclimatology; Pine Island Glacier; Quaternary; radioactive isotopes; rates; relative age; thickness; West Antarctic ice sheet DO - http://dx.doi.org/10.1126/science.1247385 ER - TY - CPAPER T1 - Science and Technology Challenges to Realize the National Bio-Surveillance Strategy T2 - 2014 Annual Meeting of the American Association for the Advancement of Science (AAAS 2014) AN - 1510100029; 6280359 JF - 2014 Annual Meeting of the American Association for the Advancement of Science (AAAS 2014) AU - Paragas, Jason Y1 - 2014/02/13/ PY - 2014 DA - 2014 Feb 13 KW - Technology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510100029?accountid=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=Science+and+Technology+Challenges+to+Realize+the+National+Bio-Surveillance+Strategy&rft.au=Paragas%2C+Jason&rft.aulast=Paragas&rft.aufirst=Jason&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 - CPAPER T1 - Radiochemical Measurements of Neutron Capture and Isomeric Data at the NIF T2 - 2014 Annual Meeting of the American Association for the Advancement of Science (AAAS 2014) AN - 1510095802; 6279924 JF - 2014 Annual Meeting of the American Association for the Advancement of Science (AAAS 2014) AU - Gharibyan, Narek Y1 - 2014/02/13/ PY - 2014 DA - 2014 Feb 13 KW - Neutrons UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510095802?accountid=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=Radiochemical+Measurements+of+Neutron+Capture+and+Isomeric+Data+at+the+NIF&rft.au=Gharibyan%2C+Narek&rft.aulast=Gharibyan&rft.aufirst=Narek&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 - Decadal to century scale changes in North Pacific Ocean phytoplankton communities assessed by Delta 13C compound-specific stable isotope analysis of deep-sea corals AN - 1807504243; 2016-063724 JF - Ocean Sciences Meeting AU - McMahon, K W AU - McCarthy, M AU - Guilderson, Thomas P AU - Sharp, Jonathan AU - Briscoe, Mel AU - Itsweire, Eric Y1 - 2014/02// PY - 2014 DA - February 2014 EP - Abstract 13880 PB - American Geophysical Union (AGU), [varies] VL - 17 KW - phytoplankton KW - communities KW - isotopes KW - ecosystems KW - prokaryotes KW - deep-sea environment KW - plankton KW - stable isotopes KW - carbon KW - amino acids KW - Anthozoa KW - Invertebrata KW - geochemistry KW - productivity KW - processes KW - eukaryotes KW - isotope ratios KW - biochemistry KW - C-13/C-12 KW - nutrients KW - organic compounds KW - organic acids KW - North Pacific KW - marine environment KW - Pacific Ocean KW - Cnidaria KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807504243?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Decadal+to+century+scale+changes+in+North+Pacific+Ocean+phytoplankton+communities+assessed+by+Delta+13C+compound-specific+stable+isotope+analysis+of+deep-sea+corals&rft.au=McMahon%2C+K+W%3BMcCarthy%2C+M%3BGuilderson%2C+Thomas+P%3BSharp%2C+Jonathan%3BBriscoe%2C+Mel%3BItsweire%2C+Eric&rft.aulast=McMahon&rft.aufirst=K&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 - 2016-07-29 N1 - CODEN - #07653 N1 - SubjectsTermNotLitGenreText - amino acids; Anthozoa; biochemistry; C-13/C-12; carbon; Cnidaria; communities; deep-sea environment; ecosystems; eukaryotes; geochemistry; Invertebrata; isotope ratios; isotopes; marine environment; North Pacific; nutrients; organic acids; organic compounds; Pacific Ocean; phytoplankton; plankton; processes; productivity; prokaryotes; stable isotopes ER - TY - JOUR T1 - Zr isotope systematics of Allende CAIs AN - 1869030179; 2017-009534 JF - Annual Meeting of the Meteoritical Society AU - Mane, P AU - Romaniello, S J AU - Brennecka, G A AU - Williams, C D AU - Wadhwa, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5403 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - stony meteorites KW - isotopes KW - enrichment KW - calcium-aluminum inclusions KW - mass spectra KW - zirconium KW - nucleosynthesis KW - carbonaceous chondrites KW - CV chondrites KW - early solar system KW - Allende Meteorite KW - ICP mass spectra KW - meteorites KW - radioactive isotopes KW - r-process KW - Zr-96 KW - neutrons KW - metals KW - homogeneity KW - inclusions KW - spectra KW - chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869030179?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Zr+isotope+systematics+of+Allende+CAIs&rft.au=Mane%2C+P%3BRomaniello%2C+S+J%3BBrennecka%2C+G+A%3BWilliams%2C+C+D%3BWadhwa%2C+M%3BAnonymous&rft.aulast=Mane&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/5403.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 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - Number of references - 9 N1 - SuppNotes - Accessed on June 29, 2016 N1 - Last updated - 2017-02-17 N1 - SubjectsTermNotLitGenreText - Allende Meteorite; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; CV chondrites; early solar system; enrichment; homogeneity; ICP mass spectra; inclusions; isotopes; mass spectra; metals; meteorites; neutrons; nucleosynthesis; r-process; radioactive isotopes; spectra; stony meteorites; zirconium; Zr-96 ER - TY - JOUR T1 - Constraints on the accretion history of Mars AN - 1849310469; 2016-108997 JF - Annual Meeting of the Meteoritical Society AU - Brennecka, G A AU - Borg, L E AU - Symes, S J K AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5188 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - stony meteorites KW - isotopes KW - Martian meteorites KW - mantle KW - Mars KW - stable isotopes KW - SNC Meteorites KW - meteorites KW - radioactive isotopes KW - melting KW - dates KW - absolute age KW - rare earths KW - magma oceans KW - accretion KW - isotope ratios KW - differentiation KW - impacts KW - achondrites KW - terrestrial planets KW - planets KW - Nd-144/Nd-142 KW - shergottite KW - Sm/Nd KW - metals KW - heat sources KW - planetary interiors KW - neodymium KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310469?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Constraints+on+the+accretion+history+of+Mars&rft.au=Brennecka%2C+G+A%3BBorg%2C+L+E%3BSymes%2C+S+J+K%3BAnonymous&rft.aulast=Brennecka&rft.aufirst=G&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/5188.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 - 10 N1 - SuppNotes - Accessed on May 13, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - absolute age; accretion; achondrites; dates; differentiation; heat sources; impacts; isotope ratios; isotopes; magma oceans; mantle; Mars; Martian meteorites; melting; metals; meteorites; Nd-144/Nd-142; neodymium; planetary interiors; planets; radioactive isotopes; rare earths; shergottite; Sm/Nd; SNC Meteorites; stable isotopes; stony meteorites; terrestrial planets ER - TY - JOUR T1 - Oxygen isotope variation in fine-grained CAIs in ALHA 77307; mixing and transport in diverse nebular environments AN - 1840620322; 2016-098329 JF - Annual Meeting of the Meteoritical Society AU - Jacobsen, B AU - Han, J M AU - Matzel, J E AU - Brearley, Adrian J AU - Hutcheon, I D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5414 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - isotope ratios KW - calcium-aluminum inclusions KW - mass spectra KW - carbonaceous chondrites KW - thermal history KW - stable isotopes KW - variations KW - solar nebula KW - CO chondrites KW - meteorites KW - Allan Hills Meteorites KW - transport KW - mixing KW - fine-grained materials KW - inclusions KW - ALHA 77307 KW - spectra KW - chondrites KW - O-17/O-16 KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840620322?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Oxygen+isotope+variation+in+fine-grained+CAIs+in+ALHA+77307%3B+mixing+and+transport+in+diverse+nebular+environments&rft.au=Jacobsen%2C+B%3BHan%2C+J+M%3BMatzel%2C+J+E%3BBrearley%2C+Adrian+J%3BHutcheon%2C+I+D%3BAnonymous&rft.aulast=Jacobsen&rft.aufirst=B&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/5414.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 13, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - ALHA 77307; Allan Hills Meteorites; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; CO chondrites; fine-grained materials; inclusions; ion probe data; isotope ratios; isotopes; mass spectra; meteorites; mixing; O-17/O-16; oxygen; solar nebula; spectra; stable isotopes; stony meteorites; thermal history; transport; variations ER - TY - JOUR T1 - Quantifying groundwater discharge to subalpine streams using radon AN - 1815669478; 2016-073590 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Moran, Jean E AU - De Rubeis, E AU - Visser, A AU - Singleton, M J AU - Uriostegui, S H AU - Esser, B K AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1729 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - Sierra Nevada KW - subalpine environment KW - terrestrial environment KW - elevation KW - surface water KW - solutes KW - radon KW - xenon KW - climate change KW - measurement KW - ground water KW - California KW - Squaw Creek KW - quantitative analysis KW - noble gases KW - mass balance KW - runoff KW - seasonal variations KW - discharge KW - Martis Creek KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815669478?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Quantifying+groundwater+discharge+to+subalpine+streams+using+radon&rft.au=Moran%2C+Jean+E%3BDe+Rubeis%2C+E%3BVisser%2C+A%3BSingleton%2C+M+J%3BUriostegui%2C+S+H%3BEsser%2C+B+K%3BAnonymous&rft.aulast=Moran&rft.aufirst=Jean&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1729&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 - Document feature - illus. N1 - Last updated - 2016-09-01 N1 - SubjectsTermNotLitGenreText - California; climate change; discharge; elevation; ground water; Martis Creek; mass balance; measurement; noble gases; quantitative analysis; radon; runoff; seasonal variations; Sierra Nevada; solutes; Squaw Creek; subalpine environment; surface water; terrestrial environment; United States; xenon ER - TY - BOOK T1 - Silica gel behavior under different EGS chemical and thermal conditions; an experimental study AN - 1803778106; 2016-062489 JF - The effects of induced hydraulic fracturing on the environment; commercial demands vs. water, wildlife, and human ecosystems AU - Hunt, Jonathan AU - Ezzedine, Souheil AU - Bourcier, William AU - Roberts, Sarah Y1 - 2014 PY - 2014 DA - 2014 PB - Apple Academic Press, Waretown, NJ SN - 9781926895833 KW - hydraulic fracturing KW - experimental studies KW - colloidal materials KW - thermal properties KW - injection KW - pollution KW - enhanced recovery KW - migration of elements KW - fluid dynamics KW - preventive measures KW - gels KW - temperature KW - carbon dioxide KW - geothermal energy KW - fractures KW - geothermal systems KW - viscosity KW - silica KW - heat transfer KW - high temperature KW - 29A:Economic geology, geology of energy sources KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803778106?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&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Hunt%2C+Jonathan%3BEzzedine%2C+Souheil%3BBourcier%2C+William%3BRoberts%2C+Sarah&rft.aulast=Hunt&rft.aufirst=Jonathan&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=9781926895833&rft.btitle=Silica+gel+behavior+under+different+EGS+chemical+and+thermal+conditions%3B+an+experimental+study&rft.title=Silica+gel+behavior+under+different+EGS+chemical+and+thermal+conditions%3B+an+experimental+study&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 3 N1 - PubXState - NJ N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-07-14 ER - TY - JOUR T1 - The use of pharmaceuticals and personal care products, the gadolinium anomaly, and delta (super 11) B in the evaluation of impacted California groundwaters AN - 1765877009; 2016-011273 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Eppich, Gary R AU - Esser, Bradley K AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 631 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - sorption KW - degradation KW - isotopes KW - waste water KW - water management KW - mass spectra KW - chemical waste KW - stable isotopes KW - irrigation KW - ground water KW - evaluation KW - California KW - quantitative analysis KW - mixing KW - tracers KW - geochemical anomalies KW - spectra KW - rare earths KW - water pollution KW - pollutants KW - human activity KW - Central California KW - pollution KW - ICP mass spectra KW - recharge KW - gadolinium KW - San Francisco Bay region KW - dilution KW - metals KW - B-11/B-10 KW - boron KW - personal care products KW - pharmaceutical waste KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765877009?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+use+of+pharmaceuticals+and+personal+care+products%2C+the+gadolinium+anomaly%2C+and+delta+%28super+11%29+B+in+the+evaluation+of+impacted+California+groundwaters&rft.au=Eppich%2C+Gary+R%3BEsser%2C+Bradley+K%3BAnonymous&rft.aulast=Eppich&rft.aufirst=Gary&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=631&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2014/uploads/abstracts/finalPDFs/A-Z.pdf 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 - 2016-02-18 N1 - SubjectsTermNotLitGenreText - B-11/B-10; boron; California; Central California; chemical waste; degradation; dilution; evaluation; gadolinium; geochemical anomalies; ground water; human activity; ICP mass spectra; irrigation; isotopes; mass spectra; metals; mixing; personal care products; pharmaceutical waste; pollutants; pollution; quantitative analysis; rare earths; recharge; San Francisco Bay region; sorption; spectra; stable isotopes; tracers; United States; waste water; water management; water pollution ER - TY - JOUR T1 - From imaging to understanding frontiers in chemical imaging of soil carbon dynamics AN - 1752579298; 2016-002643 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Keiluweit, Marco AU - Kleber, Markus AU - Bougoure, Jeremy J AU - Weber, Peter K AU - Pett-Ridge, Jennifer AU - Nico, Peter S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1218 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - soils KW - ion probe data KW - three-dimensional models KW - mass spectra KW - infrared spectra KW - geochemical cycle KW - FTIR spectra KW - sample preparation KW - organic compounds KW - carbon KW - EXAFS data KW - X-ray fluorescence spectra KW - spectra KW - carbon cycle KW - Eh KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752579298?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=From+imaging+to+understanding+frontiers+in+chemical+imaging+of+soil+carbon+dynamics&rft.au=Keiluweit%2C+Marco%3BKleber%2C+Markus%3BBougoure%2C+Jeremy+J%3BWeber%2C+Peter+K%3BPett-Ridge%2C+Jennifer%3BNico%2C+Peter+S%3BAnonymous&rft.aulast=Keiluweit&rft.aufirst=Marco&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1218&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 - 2015-12-31 N1 - SubjectsTermNotLitGenreText - carbon; carbon cycle; Eh; EXAFS data; FTIR spectra; geochemical cycle; infrared spectra; ion probe data; mass spectra; organic compounds; sample preparation; soils; spectra; three-dimensional models; X-ray fluorescence spectra ER - TY - JOUR T1 - High-precision (super 10) Be dating; a community effort AN - 1752579059; 2016-002801 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Zimmerman, Susan R H AU - Finkel, R AU - Brown, Robert C AU - Thomas, A AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2875 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - methods KW - alkaline earth metals KW - precision KW - Quaternary KW - Be-10 KW - isotopes KW - calibration KW - Holocene KW - exposure age KW - measurement KW - Cenozoic KW - radioactive isotopes KW - quantitative analysis KW - metals KW - beryllium KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752579059?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+%28super+10%29+Be+dating%3B+a+community+effort&rft.au=Zimmerman%2C+Susan+R+H%3BFinkel%2C+R%3BBrown%2C+Robert+C%3BThomas%2C+A%3BAnonymous&rft.aulast=Zimmerman&rft.aufirst=Susan+R&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2875&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2014/uploads/abstracts/finalPDFs/A-Z.pdf 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 - 4 N1 - Last updated - 2015-12-31 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Be-10; beryllium; calibration; Cenozoic; exposure age; Holocene; isotopes; measurement; metals; methods; precision; quantitative analysis; Quaternary; radioactive isotopes ER - TY - JOUR T1 - Additional evidence for young ferroan anorthositic magmatism on the Moon from Sm-Nd isotopic measurements of 60016 clast 3A AN - 1752576479; 2016-000477 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Marks, N AU - Borg, L AU - Gaffney, A AU - Shearer, C AU - Burger, P AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1129 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - isotopes KW - igneous rocks KW - partial melting KW - ferroan anorthosite KW - lunar breccia KW - stable isotopes KW - radioactive isotopes KW - plutonic rocks KW - mineral composition KW - Sm-147/Nd-144 KW - dates KW - cumulates KW - metamorphic rocks KW - absolute age KW - samarium KW - rare earths KW - magma oceans KW - breccia KW - impactites KW - Moon KW - isotope ratios KW - magmatism KW - Sample 60016 KW - impact breccia KW - clasts KW - anorthosite KW - Nd-144/Nd-143 KW - lunar samples KW - Nd-144/Nd-142 KW - Sm/Nd KW - metals KW - lunar mantle KW - petrography KW - neodymium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576479?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Additional+evidence+for+young+ferroan+anorthositic+magmatism+on+the+Moon+from+Sm-Nd+isotopic+measurements+of+60016+clast+3A&rft.au=Marks%2C+N%3BBorg%2C+L%3BGaffney%2C+A%3BShearer%2C+C%3BBurger%2C+P%3BAnonymous&rft.aulast=Marks&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 - www.hou.usra.edu/meetings/lpsc2014/pdf/1129.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 Apr. 15, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; anorthosite; breccia; clasts; cumulates; dates; ferroan anorthosite; igneous rocks; impact breccia; impactites; isotope ratios; isotopes; lunar breccia; lunar mantle; lunar samples; magma oceans; magmatism; metals; metamorphic rocks; mineral composition; Moon; Nd-144/Nd-142; Nd-144/Nd-143; neodymium; partial melting; petrography; plutonic rocks; radioactive isotopes; rare earths; samarium; Sample 60016; Sm-147/Nd-144; Sm/Nd; stable isotopes ER - TY - JOUR T1 - Exploration of environmental tungsten stable isotope fractionation using MC-ICP-MS AN - 1752575977; 2016-002640 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Kayzar, Theresa M AU - Williams, Ross W AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1215 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - isotope fractionation KW - W-186/W-183 KW - isotopes KW - pollutants KW - isotope ratios KW - pollution KW - mass spectra KW - ICP mass spectra KW - tungsten KW - transport KW - metals KW - spectra KW - water pollution KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752575977?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Exploration+of+environmental+tungsten+stable+isotope+fractionation+using+MC-ICP-MS&rft.au=Kayzar%2C+Theresa+M%3BWilliams%2C+Ross+W%3BAnonymous&rft.aulast=Kayzar&rft.aufirst=Theresa&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1215&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 - 2015-12-31 N1 - SubjectsTermNotLitGenreText - ICP mass spectra; isotope fractionation; isotope ratios; isotopes; mass spectra; metals; pollutants; pollution; spectra; transport; tungsten; W-186/W-183; water pollution ER - TY - JOUR T1 - Mn-Cr isotope systematics of fayalite-silica intergrowths from the Stardust Mission to Comet 81P/Wild 2 AN - 1734266642; 2015-108215 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Matzel, J E P AU - Ishii, H A AU - Joswiak, D AU - Brownlee, D AU - Hutcheon, I D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1645 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - ion probe data KW - isotopes KW - Mn-55/Cr-52 KW - mass spectra KW - olivine group KW - manganese KW - stable isotopes KW - temperature KW - fayalite KW - silica KW - orthosilicates KW - Wild 2 Comet KW - spectra KW - chromium KW - Stardust Mission KW - isotope ratios KW - parent bodies KW - intergrowths KW - comae KW - nesosilicates KW - iron sulfides KW - Cr-53/Cr-52 KW - metals KW - petrography KW - NanoSIMS KW - sulfides KW - cometary dust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734266642?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mn-Cr+isotope+systematics+of+fayalite-silica+intergrowths+from+the+Stardust+Mission+to+Comet+81P%2FWild+2&rft.au=Matzel%2C+J+E+P%3BIshii%2C+H+A%3BJoswiak%2C+D%3BBrownlee%2C+D%3BHutcheon%2C+I+D%3BAnonymous&rft.aulast=Matzel&rft.aufirst=J+E&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/1645.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 - 4 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jun. 12, 2015 N1 - Last updated - 2015-11-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - chromium; comae; cometary dust; Cr-53/Cr-52; fayalite; intergrowths; ion probe data; iron sulfides; isotope ratios; isotopes; manganese; mass spectra; metals; Mn-55/Cr-52; NanoSIMS; nesosilicates; olivine group; orthosilicates; parent bodies; petrography; silica; silicates; spectra; stable isotopes; Stardust Mission; sulfides; temperature; Wild 2 Comet ER - TY - JOUR T1 - Asteroid threat mitigation; an in-depth look at what can be done in three real-object scenarios AN - 1734264046; 2015-108194 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Howley, K M AU - Owen, J M AU - Wasem, J V AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2276 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - 1998 KY26 Asteroid KW - near-Earth objects KW - asteroids KW - near-Earth asteroids KW - explosions KW - Monte Carlo analysis KW - statistical analysis KW - impacts KW - simulation KW - rubble-pile asteroids KW - models KW - Apophis Asteroid KW - physical properties KW - mitigation KW - 2008 EV5 Asteroid KW - natural hazards KW - velocity KW - hydrodynamics KW - nuclear explosions KW - kinetics KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734264046?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Asteroid+threat+mitigation%3B+an+in-depth+look+at+what+can+be+done+in+three+real-object+scenarios&rft.au=Howley%2C+K+M%3BOwen%2C+J+M%3BWasem%2C+J+V%3BAnonymous&rft.aulast=Howley&rft.aufirst=K&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/2276.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 - 1998 KY26 Asteroid; 2008 EV5 Asteroid; Apophis Asteroid; asteroids; explosions; hydrodynamics; impacts; kinetics; mitigation; models; Monte Carlo analysis; natural hazards; near-Earth asteroids; near-Earth objects; nuclear explosions; physical properties; rubble-pile asteroids; simulation; statistical analysis; velocity ER - TY - JOUR T1 - Plutonium desorption from mineral surfaces caused by environmental concentrations of hydrogen peroxide AN - 1729848400; 2015-103622 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Begg, J D AU - Zavarin, M AU - Kersting, A B AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 154 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - silicates KW - experimental studies KW - desorption KW - goethite KW - silica minerals KW - plutonium KW - adsorption KW - clay minerals KW - controls KW - catalysis KW - metals KW - hydrogen peroxide KW - quartz KW - oxides KW - sheet silicates KW - framework silicates KW - mobility KW - actinides KW - pH KW - Eh KW - montmorillonite KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729848400?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Plutonium+desorption+from+mineral+surfaces+caused+by+environmental+concentrations+of+hydrogen+peroxide&rft.au=Begg%2C+J+D%3BZavarin%2C+M%3BKersting%2C+A+B%3BAnonymous&rft.aulast=Begg&rft.aufirst=J&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=154&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; adsorption; catalysis; clay minerals; controls; desorption; Eh; experimental studies; framework silicates; goethite; hydrogen peroxide; metals; mobility; montmorillonite; oxides; pH; plutonium; quartz; sheet silicates; silica minerals; silicates ER - TY - JOUR T1 - Determination of uranium content in silicate uranium ores by gamma spectrometry combined with ISOCS AN - 1729846711; 2015-105532 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Vanzha, S AU - Kutnii, D AU - Zyma, G AU - Knight, K AU - Kayzar, T AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2559 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - uranium ores KW - quantitative analysis KW - metals KW - mathematical methods KW - metal ores KW - gamma-ray spectra KW - uranium KW - spectra KW - actinides KW - measurement KW - 02C:Geochemistry of rocks, soils, and sediments KW - 27A:Economic geology, geology of ore deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729846711?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Determination+of+uranium+content+in+silicate+uranium+ores+by+gamma+spectrometry+combined+with+ISOCS&rft.au=Vanzha%2C+S%3BKutnii%2C+D%3BZyma%2C+G%3BKnight%2C+K%3BKayzar%2C+T%3BAnonymous&rft.aulast=Vanzha&rft.aufirst=S&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2559&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; gamma-ray spectra; mathematical methods; measurement; metal ores; metals; quantitative analysis; spectra; uranium; uranium ores ER - TY - JOUR T1 - Seasonal groundwater recharge in the snow-dominated Sierra Nevada using cosmogenic S-35 AN - 1729846691; 2015-105507 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Urioestegui, S H AU - Bibby, R K AU - Esser, B K AU - Clark, J F AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2534 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - Sierra Nevada KW - aquifer vulnerability KW - isotopes KW - ecosystems KW - climate change KW - ground water KW - California KW - radioactive isotopes KW - sampling KW - quantitative analysis KW - snow KW - Martis Valley basin KW - discharge KW - water supply KW - surface water KW - solutes KW - S-35 KW - aquifers KW - Sagehen Creek basin KW - recharge KW - streamflow KW - runoff KW - sulfur KW - seasonal variations KW - 21:Hydrogeology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729846691?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Seasonal+groundwater+recharge+in+the+snow-dominated+Sierra+Nevada+using+cosmogenic+S-35&rft.au=Urioestegui%2C+S+H%3BBibby%2C+R+K%3BEsser%2C+B+K%3BClark%2C+J+F%3BAnonymous&rft.aulast=Urioestegui&rft.aufirst=S&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2534&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 - aquifer vulnerability; aquifers; California; climate change; discharge; ecosystems; ground water; isotopes; Martis Valley basin; quantitative analysis; radioactive isotopes; recharge; runoff; S-35; Sagehen Creek basin; sampling; seasonal variations; Sierra Nevada; snow; solutes; streamflow; sulfur; surface water; United States; water supply ER - TY - JOUR T1 - Sm-Nd systematics of lunar ferroan-anorthosite; constraints on Moon formation and its early evolution AN - 1718054255; 2015-095374 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Boyet, M AU - Carlson, R W AU - Borg, L E AU - Horan, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 262 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - silicates KW - solar system KW - plagioclase KW - magma oceans KW - Moon KW - isotopes KW - isotope ratios KW - igneous rocks KW - stable isotopes KW - anorthosite KW - Nd-144/Nd-143 KW - models KW - genesis KW - plutonic rocks KW - Sm/Nd KW - metals KW - crystallization KW - framework silicates KW - rare earths KW - neodymium KW - feldspar group KW - crust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054255?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sm-Nd+systematics+of+lunar+ferroan-anorthosite%3B+constraints+on+Moon+formation+and+its+early+evolution&rft.au=Boyet%2C+M%3BCarlson%2C+R+W%3BBorg%2C+L+E%3BHoran%2C+M%3BAnonymous&rft.aulast=Boyet&rft.aufirst=M&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=262&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2014/uploads/abstracts/finalPDFs/A-Z.pdf 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 - 1 N1 - Last updated - 2015-10-01 N1 - SubjectsTermNotLitGenreText - anorthosite; crust; crystallization; feldspar group; framework silicates; genesis; igneous rocks; isotope ratios; isotopes; magma oceans; metals; models; Moon; Nd-144/Nd-143; neodymium; plagioclase; plutonic rocks; rare earths; silicates; Sm/Nd; solar system; stable isotopes ER - TY - JOUR T1 - Pressure and geomechanical response to CO2 injection at Snohvit, Norway AN - 1707529377; 2015-080092 AB - An unexpected pressure rise during CO2 injection into the Tubaen Fm. at Snohvit led to a considerable decrease in the estimated total capacity and to the final abandonment of injection operations in this particular reservoir. This pressure build up and the fluvial nature of the reservoir suggests a strong stratigraphic compartmentalization. However the complex fault configuration in the area also suggests a potential structural contribution to the compartmentalization. Nevertheless, the pressure behavior after injection stopped indicates that the compartment is not completely closed. In this work we perform wellbore pressure and reservoir hydromechanical analyses to understand the geomechanical behavior of the Tubaen Fm. and shed light on the mechanisms of fluid migration outside the main compartment. The Snohvit gas field is located offshore Norway in the Barents Sea. CO2 is separated from the produced gas and, until 2011, it was stored underground in the Tubaen Fm. at approximately 2600 m depth. Since then, injection has moved to a different horizon. The Tubaen Fm. corresponds to a delta plain environment dominated by fluvial distributary channels and some marine-tidal influence. It is separated from the producing gas reservoir (Sto Fm.) by the Nordmela 1 and 2 Fms. that contain wide shale layers expected to act as flow barriers. Structurally this area is extensively faulted, characterized by a dominant east-west-trending fault system, where the majority of the faults dip toward the basin axis and define typical horsts and graben geometry. However, it also present faults at high angles to this trend, leading to complex fault interactions. Given the reservoir characteristics, injection rates and pressures, 4D seismic observations, and available in situ stress tensor estimates, we use a coupled hydromechanical approach to understand the geomechanical response of the system to the CO2 injection, focusing on addressing the CO2 distribution and migration outside of the main compartment. JF - Abstracts: Annual Meeting - American Association of Petroleum Geologists AU - Chiaramonte, Laura AU - White, Joshua A AU - Hao, Yue AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 PB - American Association of Petroleum Geologists and Society for Sedimentary Geology, Tulsa, OK VL - 2014 KW - natural gas KW - petroleum KW - Europe KW - Nordmela Formation KW - oil and gas fields KW - Snohvit Field KW - reservoir rocks KW - carbon dioxide KW - Tubaen Formation KW - fluid injection KW - Sto Formation KW - compartmentalization KW - Barents Sea KW - Arctic Ocean KW - depositional environment KW - faults KW - sealing KW - carbon sequestration KW - Western Europe KW - pressure KW - Jurassic KW - fluid flow KW - mechanical properties KW - Mesozoic KW - Scandinavia KW - reservoir properties KW - deltaic environment KW - Norway KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707529377?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Pressure+and+geomechanical+response+to+CO2+injection+at+Snohvit%2C+Norway&rft.au=Chiaramonte%2C+Laura%3BWhite%2C+Joshua+A%3BHao%2C+Yue%3BAnonymous&rft.aulast=Chiaramonte&rft.aufirst=Laura&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/1842292.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 14, 2014 N1 - Last updated - 2015-08-27 N1 - CODEN - #06983 N1 - SubjectsTermNotLitGenreText - Arctic Ocean; Barents Sea; carbon dioxide; carbon sequestration; compartmentalization; deltaic environment; depositional environment; Europe; faults; fluid flow; fluid injection; Jurassic; mechanical properties; Mesozoic; natural gas; Nordmela Formation; Norway; oil and gas fields; petroleum; pressure; reservoir properties; reservoir rocks; Scandinavia; sealing; Snohvit Field; Sto Formation; Tubaen Formation; Western Europe ER - TY - JOUR T1 - Site-selective TRLFS of Eu(III) doped rare earth phosphates for conditioning of radioactive wastes AN - 1707521299; 2015-083393 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Huittinen, N AU - Arinicheva, Y AU - Holthausen, J AU - Holliday, K S AU - Neumeier, S AU - Stumpf, T AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1071 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - lattice KW - isotopes KW - plutonium KW - coordination KW - substitution KW - crystal structure KW - curium KW - radioactive waste KW - xenotime KW - radioactive isotopes KW - X-ray fluorescence spectra KW - spectra KW - rare earths KW - europium KW - ceramic materials KW - high-level waste KW - phosphates KW - time scales KW - metals KW - americium KW - monazite KW - crystallization KW - cations KW - waste disposal KW - actinides KW - 22:Environmental geology KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707521299?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Site-selective+TRLFS+of+Eu%28III%29+doped+rare+earth+phosphates+for+conditioning+of+radioactive+wastes&rft.au=Huittinen%2C+N%3BArinicheva%2C+Y%3BHolthausen%2C+J%3BHolliday%2C+K+S%3BNeumeier%2C+S%3BStumpf%2C+T%3BAnonymous&rft.aulast=Huittinen&rft.aufirst=N&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1071&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 - 4 N1 - Last updated - 2015-08-27 N1 - SubjectsTermNotLitGenreText - actinides; americium; cations; ceramic materials; coordination; crystal structure; crystallization; curium; europium; high-level waste; isotopes; lattice; metals; monazite; phosphates; plutonium; radioactive isotopes; radioactive waste; rare earths; spectra; substitution; time scales; waste disposal; X-ray fluorescence spectra; xenotime ER - TY - JOUR T1 - The influence of pH on the oxygen isotope composition of calcite AN - 1707519781; 2015-083400 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Hunt, Jonathan D AU - Watkins, James M AU - Ryerson, Frederick J AU - DePaolo, Donald J AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1078 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - isotope fractionation KW - experimental studies KW - geologic thermometry KW - oxygen KW - isotopes KW - isotope ratios KW - crystal growth KW - O-18/O-16 KW - bicarbonate ion KW - stable isotopes KW - temperature KW - calcite KW - partitioning KW - precipitation KW - carbon KW - kinetics KW - carbonates KW - pH KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707519781?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+influence+of+pH+on+the+oxygen+isotope+composition+of+calcite&rft.au=Hunt%2C+Jonathan+D%3BWatkins%2C+James+M%3BRyerson%2C+Frederick+J%3BDePaolo%2C+Donald+J%3BAnonymous&rft.aulast=Hunt&rft.aufirst=Jonathan&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1078&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 - Document feature - illus. N1 - Last updated - 2015-08-27 N1 - SubjectsTermNotLitGenreText - bicarbonate ion; calcite; carbon; carbonates; crystal growth; experimental studies; geologic thermometry; isotope fractionation; isotope ratios; isotopes; kinetics; O-18/O-16; oxygen; partitioning; pH; precipitation; stable isotopes; temperature ER - TY - JOUR T1 - Outer-planet satellite survival during the late heavy bombardment (II) AN - 1703685585; 2015-077778 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Movshovitz, N AU - Korycansky, Donald G AU - Nimmo, F AU - Asphaug, E I AU - Owen, J M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2308 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - solar system KW - icy satellites KW - Monte Carlo analysis KW - statistical analysis KW - late heavy bombardment KW - planetesimals KW - simulation KW - mass KW - planets KW - size distribution KW - scale models KW - dynamics KW - outer planets KW - satellites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703685585?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Outer-planet+satellite+survival+during+the+late+heavy+bombardment+%28II%29&rft.au=Movshovitz%2C+N%3BKorycansky%2C+Donald+G%3BNimmo%2C+F%3BAsphaug%2C+E+I%3BOwen%2C+J+M%3BAnonymous&rft.aulast=Movshovitz&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/2308.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 - 15 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Mar. 23, 2015 N1 - Last updated - 2015-08-13 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - dynamics; icy satellites; late heavy bombardment; mass; Monte Carlo analysis; outer planets; planetesimals; planets; satellites; scale models; simulation; size distribution; solar system; statistical analysis ER - TY - JOUR T1 - (super 14) C reservoir ages and seasonal isotope records from 17 (super th) century Jamestown oyster shells AN - 1696875669; 2015-068805 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Grimm, B L AU - Harding, J M AU - Spero, H J AU - Guilderson, T P AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 862 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - oxygen KW - isotopes KW - Holocene KW - stable isotopes KW - Cenozoic KW - radioactive isotopes KW - sampling KW - James City County Virginia KW - carbon KW - Invertebrata KW - Mollusca KW - Atlantic Coastal Plain KW - shells KW - Ostreidae KW - Virginia KW - Quaternary KW - metabolism KW - isotope ratios KW - C-13/C-12 KW - calcification KW - Ostreoidea KW - O-18/O-16 KW - geochemical cycle KW - James River KW - Bivalvia KW - archaeological sites KW - Jamestown KW - seasonal variations KW - carbon cycle KW - C-14 KW - upper Holocene KW - Jamestown Island KW - 24:Quaternary geology KW - 10:Invertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875669?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=%28super+14%29+C+reservoir+ages+and+seasonal+isotope+records+from+17+%28super+th%29+century+Jamestown+oyster+shells&rft.au=Grimm%2C+B+L%3BHarding%2C+J+M%3BSpero%2C+H+J%3BGuilderson%2C+T+P%3BAnonymous&rft.aulast=Grimm&rft.aufirst=B&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=862&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 - 2015-11-19 N1 - SubjectsTermNotLitGenreText - Atlantic Coastal Plain; Bivalvia; C-13/C-12; C-14; calcification; carbon; carbon cycle; Cenozoic; geochemical cycle; Holocene; Invertebrata; isotope ratios; isotopes; James City County Virginia; James River; Jamestown Island; Jamestown; metabolism; Mollusca; O-18/O-16; Ostreidae; Ostreoidea; oxygen; Quaternary; radioactive isotopes; sampling; seasonal variations; shells; stable isotopes; United States; upper Holocene; Virginia; archaeological sites ER - TY - JOUR T1 - Thermal and chemical diffusion in the liquid system albite-anorthite AN - 1692745856; 2015-063304 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - DePaolo, D J AU - Watkins, J M AU - Ryerson, F J AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 537 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - silicates KW - calcium KW - Ca-40 KW - volcanic rocks KW - solutions KW - isotopes KW - igneous rocks KW - Ca-44 KW - stable isotopes KW - variations KW - anorthite KW - basalts KW - framework silicates KW - thermodynamic properties KW - liquid phase KW - alkaline earth metals KW - plagioclase KW - experimental studies KW - diffusion KW - rhyolites KW - isotope ratios KW - albite KW - Ca-44/Ca-40 KW - metals KW - feldspar group KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692745856?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Thermal+and+chemical+diffusion+in+the+liquid+system+albite-anorthite&rft.au=DePaolo%2C+D+J%3BWatkins%2C+J+M%3BRyerson%2C+F+J%3BAnonymous&rft.aulast=DePaolo&rft.aufirst=D&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=537&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 - albite; alkaline earth metals; anorthite; basalts; Ca-40; Ca-44; Ca-44/Ca-40; calcium; diffusion; experimental studies; feldspar group; framework silicates; igneous rocks; isotope ratios; isotopes; liquid phase; metals; plagioclase; rhyolites; silicates; solutions; stable isotopes; thermodynamic properties; variations; volcanic rocks ER - TY - JOUR T1 - X-ray fluorescence analysis of major and trace-elements in Ukrainian uranium ores AN - 1692741652; 2015-059474 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Medvediev, A AU - Burdejniy, D AU - Vanzha, S AU - Kutnii, D AU - Knight, K AU - Kayzar, T AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1660 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - Ukraine KW - Kirovograd Deposit KW - Europe KW - calibration KW - samples KW - measurement KW - uranium ores KW - ore grade KW - errors KW - Commonwealth of Independent States KW - major elements KW - metal ores KW - X-ray fluorescence spectra KW - spectra KW - corrections KW - trace elements KW - 02C:Geochemistry of rocks, soils, and sediments KW - 27A:Economic geology, geology of ore deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692741652?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=X-ray+fluorescence+analysis+of+major+and+trace-elements+in+Ukrainian+uranium+ores&rft.au=Medvediev%2C+A%3BBurdejniy%2C+D%3BVanzha%2C+S%3BKutnii%2C+D%3BKnight%2C+K%3BKayzar%2C+T%3BAnonymous&rft.aulast=Medvediev&rft.aufirst=A&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1660&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 - calibration; Commonwealth of Independent States; corrections; errors; Europe; Kirovograd Deposit; major elements; measurement; metal ores; ore grade; samples; spectra; trace elements; Ukraine; uranium ores; X-ray fluorescence spectra ER - TY - JOUR T1 - Critical and Subcritical Data for the Revision of ANS 8.12 Standard AN - 1692323611; PQ0001263165 AB - The ANSI/ANS 8.12 standard on mixed plutonium (Pu) and uranium (U) oxides (MOX) [1] was first approved in 1978 and it was reaffirmed in 2002 and in. 2011. The Working Group is currently working to extend the areas of applicability by providing a wider range of subcriticai data. A decision was made in 2009 to base the specifications on the International Organization for Standardization (ISO) 11311-2011 standard [2] on MOX powder, in agreement with ISO, and to develop a new set of subcriticai limits for homogeneous systems. The development was initially delayed, pending approval of the ISO standard in 2011. JF - Transactions of the American Nuclear Society AU - Biswas, Debdas AU - Mennerdahl, Dennis AU - Tripp, Christopher AU - Revolinski, Scott AU - Bunde, Kermit AU - Huffer, Jason AU - Shea, Michael AU - Winstanley, Dominic D AD - Lawrence Livermore National Laboratory, Livermore, Ca 94550 biswas2@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 891 EP - 896 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 - Standardization KW - Plutonium KW - Organizations KW - Uranium KW - Standards KW - Specifications KW - Oxides KW - MOX UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692323611?accountid=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=Critical+and+Subcritical+Data+for+the+Revision+of+ANS+8.12+Standard&rft.au=Biswas%2C+Debdas%3BMennerdahl%2C+Dennis%3BTripp%2C+Christopher%3BRevolinski%2C+Scott%3BBunde%2C+Kermit%3BHuffer%2C+Jason%3BShea%2C+Michael%3BWinstanley%2C+Dominic+D&rft.aulast=Biswas&rft.aufirst=Debdas&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=891&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 - PyNE Progress Report AN - 1692322037; PQ0001263237 AB - PyNE is a suite of free and open source (BSD licensed) tools to aid in computational nuclear science and engineering. PyNE seeks to provide native implementations of common nuclear algorithms, as well as an interface for the scripting language Python and I/O support for industry standard nuclear codes and data formats. In the past year PyNE has added many features including a Rigorous 2-step Activation workflow (R2S) [1], Direct Accelerated Geometry Monte Carlo (DAGMC) ray tracing [2], Consistent Adjoint-Weighted Importance Sampling (CADIS) variance reduction [3], and expanded ENSDF parsing support. As a part of our ongoing efforts to implement a verification and validation framework we also added continuous integration using the Build and Test Lab [4] at the University of Wisconsin. The PyNE development team has also improved PyNE's ease of use by making binaries available for Windows, Mac, and Linux through the conda package manager as well as adding Python 3 support. JF - Transactions of the American Nuclear Society AU - Bates, Cameron R AU - Biondo, Elliott AU - Huff, Kathryn AU - Kiesling, Kalin AU - Scopatz, Anthony AU - Carlsen, Robert AU - Davis, Andrew AU - Gidden, Matthew AU - Haines, Tim AU - Howland, Joshua AD - Lawrence Livermore National Laboratory, 7000 East Ave L-188, Livermore, CA 94550; The University of California, Berkeley, 2521 Hearst Ave, Berkeley, CA 94709 bates26@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 1165 EP - 1168 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 - Activation KW - Reduction KW - Computer programs KW - Format KW - Monte Carlo methods KW - Construction KW - Source code KW - Algorithms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692322037?accountid=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=PyNE+Progress+Report&rft.au=Bates%2C+Cameron+R%3BBiondo%2C+Elliott%3BHuff%2C+Kathryn%3BKiesling%2C+Kalin%3BScopatz%2C+Anthony%3BCarlsen%2C+Robert%3BDavis%2C+Andrew%3BGidden%2C+Matthew%3BHaines%2C+Tim%3BHowland%2C+Joshua&rft.aulast=Bates&rft.aufirst=Cameron&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1165&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 Critical Experiment Design to Investigate Composite Reflection Effect AN - 1692312823; PQ0001263152 AB - Composite reflection effects, where a combination of two reflectors acts in concert to produce more reactive nuclear systems than either single reflector material separately, is a little known anomaly of criticality safety. The Lawrence Livermore National Laboratory's (LLNL's) Nuclear Criticality Safety Division, in support of fissile material operations, calculated surprisingly reactive configurations when a fissile core was surrounded by a thin, moderating reflector backed by a thick metal reflector. These composite reflector configurations were much more reactive than either of the single reflector materials separately. The calculated findings have resulted in a stricter-than-anticipated criticality control set, impacting programmatic work. JF - Transactions of the American Nuclear Society AU - Percher, C AU - Kim, S AU - Heinrichs, D AD - Lawrence Livermore National Laboratory: 7000 East Avenue, Livermore, CA, 94550 percher1@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 840 EP - 842 PB - American Nuclear Society, Inc. VL - 111 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 - Critical experiments KW - Nuclear safety KW - Nuclear fuels KW - Reflectors KW - Reflection KW - Fissile materials KW - Nuclear engineering KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692312823?accountid=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+Critical+Experiment+Design+to+Investigate+Composite+Reflection+Effect&rft.au=Percher%2C+C%3BKim%2C+S%3BHeinrichs%2C+D&rft.aulast=Percher&rft.aufirst=C&rft.date=2014-01-01&rft.volume=111&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 - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - Steady State Neutron and Gamma Measurements of the Godiva Reactor AN - 1692303924; PQ0001263136 AB - The United States Department of Energy Nuclear Criticality Safety Program (NCSP) is leading a national effort to establish a Nuclear Accident dosimetry intercomparison program and improve neutron dosimetry measurement for moderate and high dose exposures. Lawrence Livermore National Laboratory is establishing and coordinating the efforts of multiple laboratories to evaluate the neutron fluence and dose rates emitted from the recently reassembled Godiva reactor. The Godiva reactor is now operational in the National Critical Experiments Research Center (NCERC) in Nevada and is being used to improve criticality safety in the United States. JF - Transactions of the American Nuclear Society AU - Hickman, David P AU - Burch, Jennifer G AU - Hudson, Rebecca R AU - Slavik, Gary W AU - Richardson, Scott AU - Scorby, John AU - Radev, Radoslav AU - Bowden, Nathaniel AU - Heinrichs, David P AU - Goda, Joetta AD - Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94550 hickman3@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 777 EP - 779 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 - Nuclear reactors KW - Nuclear safety KW - Laboratories KW - Dosimeters KW - Dosimetry KW - Nuclear reactor components KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692303924?accountid=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=Steady+State+Neutron+and+Gamma+Measurements+of+the+Godiva+Reactor&rft.au=Hickman%2C+David+P%3BBurch%2C+Jennifer+G%3BHudson%2C+Rebecca+R%3BSlavik%2C+Gary+W%3BRichardson%2C+Scott%3BScorby%2C+John%3BRadev%2C+Radoslav%3BBowden%2C+Nathaniel%3BHeinrichs%2C+David+P%3BGoda%2C+Joetta&rft.aulast=Hickman&rft.aufirst=David&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=777&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 - 2015-09-07 ER - TY - JOUR T1 - Benchmark Investigation of a 3D Monte Carlo Levermore-Pomraning Algorithm for Binary Stochastic Media AN - 1692302966; PQ0001263108 AB - In a stochastic medium, the material properties at a given spatial location are known only statistically [1]. The most common approach to solving particle transport problems involving binary stochastic media is to use the atomic mix (AM) approximation [1] in which the transport problem is solved using ensemble-averaged (homogenized) material properties. A common deterministic model developed for solving particle transport problems in binary stochastic media is the Levermore-Pomraning (LP) model [1,2]. Zimmerman and Adams [3] proposed a Monte Carlo algorithm that solves the LP equations, and this algorithm has been demonstrated using one-dimensional planar geometry benchmark studies to generally be more accurate than the atomic mix approximation [3,4]. JF - Transactions of the American Nuclear Society AU - Brantley, Patrick S AD - Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94551 brantley1@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 655 EP - 658 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 - Media KW - Monte Carlo methods KW - Transport KW - Algorithms KW - Benchmarking KW - Approximation KW - Stochasticity KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692302966?accountid=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=Benchmark+Investigation+of+a+3D+Monte+Carlo+Levermore-Pomraning+Algorithm+for+Binary+Stochastic+Media&rft.au=Brantley%2C+Patrick+S&rft.aulast=Brantley&rft.aufirst=Patrick&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=655&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 - Cosmogenic beryllium-10 exposure dating of the Tiltill rock avalanche in Yosemite National Park AN - 1689591281; 2015-057040 AB - Yosemite National Park is an excellent natural laboratory for studying rock falls and rock avalanches, because in many areas these are the main processes modifying the near vertical slopes of this glaciated landscape. Mass wasting represents a significant hazard in the region. The inventory database of historic rock falls and other mass wasting events in Yosemite is extensive, dating back to 1857 (Stock et al., 2013). However, this record is too short to capture recurrence characteristics and triggering mechanisms of the very largest events, necessitating studies of the geologic record of mass wasting. Rock avalanches are readily dated by cosmogenic nuclide methods due to their instantaneous deposition, and results can be tied to potential triggering events such as seismic activity (e.g. Stock and Urhammer, 2010). Here, we apply cosmogenic beryllium-10 exposure dating to the 2.10 X 10 (super 6) m (super 3) Tiltill rock avalanche north of Hetch Hetchy Reservoir. Assuming an erosion rate of 0.0006 cm/yr and negligible snow shielding, the (super 10) Be data yield a mean exposure age of 11,100 +/- 400 year B.P. The age of the Tiltill rock avalanche is similar to earthquakes on the Owens Valley Fault between 10,800 +/- 600 and 10,200 +/- 200 year B.P. (Bacon, 2007) and the Deep Springs Fault, between 10,200 +/- 100 and 11,200 +/- 100 year B.P. (Lee et al., 2001). Given that movement on the Owens Valley fault in 1872 caused a number of rock falls in Yosemite, the coincidence of ages between the Tiltill rock avalanche and paleoseismic events, and the size of the Tiltill rock avalanche, we propose that a large earthquake in Eastern Sierra Nevada may have triggered this event. If seismicity is a dominant process contributing to large rock slope failures in Yosemite, the hazard posed by these events exists and depends on local earthquake recurrence intervals. JF - Abstracts with Programs - Geological Society of America AU - Ford, Kiersti Rae AU - Pluhar, Christopher J AU - Stock, Greg M AU - Stone, John O AU - Zimmerman, Susan H AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 714 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology KW - 03:Geochronology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591281?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cosmogenic+beryllium-10+exposure+dating+of+the+Tiltill+rock+avalanche+in+Yosemite+National+Park&rft.au=Ford%2C+Kiersti+Rae%3BPluhar%2C+Christopher+J%3BStock%2C+Greg+M%3BStone%2C+John+O%3BZimmerman%2C+Susan+H%3BAnonymous&rft.aulast=Ford&rft.aufirst=Kiersti&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=714&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 - Quantifying seasonal groundwater recharge in snow-dominated basins in the Sierra Nevada using cosmogenic S-35 AN - 1689589303; 2015-053934 AB - Identifying aquifer vulnerability to climate change is of vital importance in the Sierra Nevada and other snow-dominated basins where groundwater systems are essential to water supply and ecosystem health. Determining groundwater recharge and storage on short (<1 year) timescales is useful in evaluating aquifer vulnerability because significant discharge of new (<1 year old) snowmelt from the basin may indicate shallow groundwater reservoirs with a low buffering capacity in response to climate change. The goal of this study was to utilize the naturally-occurring cosmogenic radionuclide sulfur-35 (S-35, half life = 87 days) to quantify seasonal snowmelt contribution to groundwater and surface waters in Sagehen Creek Basin (SCB) and Martis Valley Groundwater Basin (MVGB), two basins located in the central Sierra Nevada, California. Activities of S-35 were measured in dissolved sulfate in SCB and MVGB snowpack, groundwater, and streamflow. The percent of new snowmelt (PNS) in SCB groundwater and streamflow was determined using the average winter snowpack S-35 activity as the precipitation end member. An expansion of this study in MVGB involved more frequent snow sampling with the end member defined as the volume-weighted mean S-35 activity in snowpack. The PNS in SCB streamflow ranged from <6% during baseflow conditions to 22% during high flow periods. Similar to SCB, the PNS in MVGB groundwater and streamflow was typically <26% with the largest percentages occurring in late spring or early summer following peak streamflow. The consistently low PNS suggests that a significant fraction of seasonal snowmelt in SCB and MVGB recharges groundwater, and that groundwater contributions to streamflow in these systems has the potential to buffer climate change impacts on runoff. JF - Abstracts with Programs - Geological Society of America AU - Uriostegui, Stephanie H AU - Bibby, Richard K AU - Esser, Bradley K AU - Clark, Jordan F AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 744 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689589303?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+seasonal+groundwater+recharge+in+snow-dominated+basins+in+the+Sierra+Nevada+using+cosmogenic+S-35&rft.au=Uriostegui%2C+Stephanie+H%3BBibby%2C+Richard+K%3BEsser%2C+Bradley+K%3BClark%2C+Jordan+F%3BAnonymous&rft.aulast=Uriostegui&rft.aufirst=Stephanie&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=744&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 - Kinetic studies Np(VI) ligand exchange using NMR AN - 1686060466; 2015-049228 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Panasci, A F AU - Harley, S J AU - Zavarin, M AU - Casey, W H AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1894 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - experimental studies KW - neptunium KW - entropy KW - substitution KW - NMR spectra KW - models KW - activation energy KW - ligands KW - enthalpy KW - metals KW - spectra KW - kinetics KW - actinides KW - pH KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686060466?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Kinetic+studies+Np%28VI%29+ligand+exchange+using+NMR&rft.au=Panasci%2C+A+F%3BHarley%2C+S+J%3BZavarin%2C+M%3BCasey%2C+W+H%3BAnonymous&rft.aulast=Panasci&rft.aufirst=A&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1894&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 - 2015-06-05 N1 - SubjectsTermNotLitGenreText - actinides; activation energy; enthalpy; entropy; experimental studies; kinetics; ligands; metals; models; neptunium; NMR spectra; pH; spectra; substitution ER - TY - JOUR T1 - Moraine chronologies combined with lake records of glacier activity from the pre-last glacial maximum to the late Holocene in central Peru AN - 1680756090; 2015-043799 AB - Fluctuations in small tropical mountain glaciers serve as sensitive indicators of variations in past and present-day climate. Most of the world's modern tropical glaciers are in the Peruvian Andes, where growing numbers of late Pleistocene to Holocene glacial records are emerging. Here we combine new and published (super 10) Be moraine chronologies with high-resolution lacustrine records from the Huaguruncho massif (10 degrees 32'S, 75 degrees 56'W) and the Cordillera Blanca (9 degrees 49'S, 77 degrees 18'W) to reconstruct a multiproxy history of glacier activity in central Peru. Our composite regional record reveals the occurrence of multiple glacial episodes from the pre-Last Glacial Maximum to the Little Ice Age. At the Huaguruncho massif, (super 10) Be exposure ages obtained from moraine sequences in a south-facing cirque indicate at least three major glacial stages spanning the Lateglacial to the Little Ice Age. Additional exposure ages are in development from moraines with stratigraphic positions that likely correspond to the Last Glacial Maximum and older glacial stages. Basal radiocarbon ages from lake sediments are consistent with (super 10) Be exposure ages on outboard moraines enclosing the depositional basins when the (super 10) Be ages are calculated using recently developed (super 10) Be production rates in the high Andes. In general, the lake sediment records reveal that over that last 12,000 years the influx of glacigenic sediment (low organic carbon, high magnetic susceptibility and bulk density) was low from approximately 13,000 - 11,500 and from approximately 8500 - 1500 cal yr BP. In contrast, from approximately 11,500 - 8500 cal yr BP and since 1500 cal yr BP, glacigenic sediment input increased significantly. The moraine ages and lake records at Huaguruncho are broadly correlative with those from the Cordillera Blanca, as well as moraine chronologies from the Cordillera Vilcabamba in southern Peru. The correspondence in age between moraine sequences and in lake sediment stratigraphy on opposite sides of the Andes suggests regional-scale coherency of multiple glacial fluctuations across the central Peruvian Andes from the late Pleistocene to the late Holocene, implying spatially uniform climate drivers in this region. JF - Abstracts with Programs - Geological Society of America AU - Licciardi, Joseph M AU - Rodbell, Donald T AU - Stansell, Nathan D AU - Schaefer, Joerg M AU - Schweinsberg, Avriel D AU - Huss, Elizabeth G AU - Finkel, Robert C AU - Zimmerman, Susan H AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 663 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/1680756090?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Moraine+chronologies+combined+with+lake+records+of+glacier+activity+from+the+pre-last+glacial+maximum+to+the+late+Holocene+in+central+Peru&rft.au=Licciardi%2C+Joseph+M%3BRodbell%2C+Donald+T%3BStansell%2C+Nathan+D%3BSchaefer%2C+Joerg+M%3BSchweinsberg%2C+Avriel+D%3BHuss%2C+Elizabeth+G%3BFinkel%2C+Robert+C%3BZimmerman%2C+Susan+H%3BAnonymous&rft.aulast=Licciardi&rft.aufirst=Joseph&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=663&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 - The early to middle Pleistocene transition in northwestern Canada and potential response of the Cordilleran ice sheet AN - 1680755420; 2015-043749 AB - One of the most remarkable features of the northern Cordilleran Ice Sheet is the record of repeated extensive glaciation in the latest Pliocene and Early Pleistocene (ca. 2.7-0.78 Ma) relative to more restricted ice during the Middle and Late Pleistocene (0.78 Ma). Weathering of primary minerals in these relict paleosols has depleted mobile elements (Ca, Na, K) to a greater extent than in soils formed during Middle and Late Pleistocene interglacials. Other proxies, including the persistence of relict permafrost through interglacials and development of the steppe fauna, suggest more broad environmental changes across the Early to Middle Pleistocene transition across this region. The advance of the Cordilleran Ice Sheet on more deeply weathered surfaces in the late Pliocene and Early Pleistocene could have provided a means of enhancing lubrication of the bed leading to more extensive ice sheets. JF - Abstracts with Programs - Geological Society of America AU - Froese, Duane G AU - Sanborn, Paul AU - Turner, Derek G AU - Hidy, Alan J AU - Porter, Trevor J AU - Ward, Brent C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 654 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/1680755420?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+early+to+middle+Pleistocene+transition+in+northwestern+Canada+and+potential+response+of+the+Cordilleran+ice+sheet&rft.au=Froese%2C+Duane+G%3BSanborn%2C+Paul%3BTurner%2C+Derek+G%3BHidy%2C+Alan+J%3BPorter%2C+Trevor+J%3BWard%2C+Brent+C%3BAnonymous&rft.aulast=Froese&rft.aufirst=Duane&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=654&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 - Not all SOM is created equal AN - 1676586075; 2015-038749 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Pett-Ridge, Jennifer AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1952 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - N-15/N-14 KW - ion probe data KW - lipids KW - lignin KW - isotopes KW - isotope ratios KW - polysaccharides KW - C-13/C-12 KW - mass spectra KW - stable isotopes KW - nitrogen KW - geochemical cycle KW - reactivity KW - organic compounds KW - organic acids KW - carbon KW - amino acids KW - carbohydrates KW - spectra KW - carbon cycle KW - organic carbon KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676586075?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Not+all+SOM+is+created+equal&rft.au=Pett-Ridge%2C+Jennifer%3BAnonymous&rft.aulast=Pett-Ridge&rft.aufirst=Jennifer&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1952&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 - 2015-04-30 N1 - SubjectsTermNotLitGenreText - amino acids; C-13/C-12; carbohydrates; carbon; carbon cycle; geochemical cycle; ion probe data; isotope ratios; isotopes; lignin; lipids; mass spectra; N-15/N-14; nitrogen; organic acids; organic carbon; organic compounds; polysaccharides; reactivity; spectra; stable isotopes ER - TY - JOUR T1 - Solution-state NMR spectroscopy up to 20 kilobars AN - 1676585569; 2015-038713 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Pautler, B G AU - Colla, C A AU - Johnson, R L AU - Klavins, P AU - Harley, S J AU - Ohlin, C A AU - Casey, W H AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1916 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - processes KW - pressure KW - solutions KW - aqueous solutions KW - solution KW - high pressure KW - NMR spectra KW - measurement KW - reactivity KW - ligands KW - spectra KW - pH KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676585569?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Solution-state+NMR+spectroscopy+up+to+20+kilobars&rft.au=Pautler%2C+B+G%3BColla%2C+C+A%3BJohnson%2C+R+L%3BKlavins%2C+P%3BHarley%2C+S+J%3BOhlin%2C+C+A%3BCasey%2C+W+H%3BAnonymous&rft.aulast=Pautler&rft.aufirst=B&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1916&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 - Number of references - 3 N1 - Last updated - 2015-04-30 N1 - SubjectsTermNotLitGenreText - aqueous solutions; high pressure; ligands; measurement; NMR spectra; pH; pressure; processes; reactivity; solution; solutions; spectra ER - TY - JOUR T1 - Timing of late Pleistocene glacier culminations and retreat in Grand Teton National Park AN - 1673367196; 2015-035576 AB - Records of glaciation in the greater Yellowstone region have long served as a cornerstone for understanding the timing of late Pleistocene glaciations in the central Rocky Mountains. In previous investigations, we applied cosmogenic (super 3) He and (super 10) Be surface exposure dating to establish high-resolution moraine chronologies in selected drainages of the Yellowstone-Teton mountain glacier complex. Here, we expand on the geographic and temporal coverage of glacial events in the greater Yellowstone and Grand Teton regions by developing >20 new (super 10) Be exposure ages on glacial features in several drainages on the eastern and western sides of the Teton Range. Our new investigations are focused on moraines and scoured bedrock surfaces at Glacier Gulch, Avalanche Canyon, Taggart Lake, Phelps Lake, Granite Canyon, Teton Canyon, and adjacent areas. All new and previously obtained (super 10) Be ages are calculated using recently published calibrations of (super 10) Be production rates, which are lower than the globally averaged production rate used in our prior work. Mean ages of outermost Pinedale moraine loops in the Tetons range from 18.6 ka at Granite Canyon to 16.4 ka at Taggart Lake, suggesting asynchrony of glacier culminations among adjacent Teton mountain glaciers. Results also distinguish an age progression from proximal to distal portions of the Taggart Lake end moraine sequence, implying that the glacier persisted or oscillated for approximately 2 ka in the terminal area before retreating upvalley. A mean age of 17.3 ka is obtained from moraine boulders along an ice limit corresponding to the Pinedale 2 phase of the southern margin of the greater Yellowstone glacial system. Direct dating of the Pinedale 2 ice limit confirms our prior indirect dating of this ice position via outwash relationships with the Jenny Lake outer moraines, which are recalculated to 17.1 ka using recently calibrated (super 10) Be production rates. This expanded chronology provides a refined understanding of the timing of late Pleistocene glacier events in the central Rocky Mountains, and enables a more critical examination of climatic and non-climatic influences on deglaciation. JF - Abstracts with Programs - Geological Society of America AU - Licciardi, Joseph M AU - Pierce, Kenneth L AU - Finkel, Robert AU - Zimmerman, Susan H AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 556 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673367196?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Timing+of+late+Pleistocene+glacier+culminations+and+retreat+in+Grand+Teton+National+Park&rft.au=Licciardi%2C+Joseph+M%3BPierce%2C+Kenneth+L%3BFinkel%2C+Robert%3BZimmerman%2C+Susan+H%3BAnonymous&rft.aulast=Licciardi&rft.aufirst=Joseph&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=556&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 - 2015-04-16 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Geochemical and experimental investigation to assess the feasibility of CO (sub 2) storage within the Arbuckle Aquifer, Kansas AN - 1668232331; 2015-031585 AB - The Arbuckle aquifer in south-central Kansas is currently being evaluated as a site for CO (sub 2) storage. Three wells have been drilled into this carbonate aquifer to determine the feasibility for safe, long-term storage of CO (sub 2) . Two test wells were drilled in Wellington, now the site of a small-scale CO (sub 2) injection pending approval by EPA. A third well, Cutter KGS #1, was drilled in SW Kansas as a western calibration site located 350 km from Wellington. At these sites three geologic zones are of interest: the Mississippian zone investigated for enhanced oil recovery purposes, a potential baffle zone in the upper Arbuckle that could help impede vertical CO (sub 2) migration, and the Arbuckle injection zone. At both Cutter and Wellington DST and swabbed waters were used for hydrochemical characterization and comparison of the brines. delta (super 18) O vs. delta D ratios indicate limited vertical zonation of water within Cutter, unlike at Wellington, which remarkably shows the presence of in-between baffle zones. delta (super 18) O-delta D ratio vs. Cl (super -) helps confirm this while also suggesting a single water origin at Cutter. At Wellington Ca/Mg vs. Ca/Sr ratios show that the upper Arbuckle waters trend towards calcite recrystallization, while the lower Arbuckle shows more of a dolomitization trend. At Cutter these same ratios show a higher dolomitization trend. At both locations overall increasing TDS with depth allows for higher rate and availability of reacting ions. Experimental work at Lawrence Livermore National Laboratory investigated a carbonate core (fine-grained dolomite, moderately fractured with chert infillings including a large chert nodule ( approximately 2cm)) being simultaneously injected with CO (sub 2) and formation brine to model a simulated in-situ injection. Initial dissolution appears to have occurred along the dolomite/chert boundary after the experiment. Dissolution along mineral boundaries and fractures and determinations of change of net porosity and permeability are currently being measured by X-ray CT scans. Geochemical modeling is used to confirm mineral saturation states and reaction kinetics for similar lithologies in Cutter. These experimental results and geochemical modeling predictions will complement one another, and will allow for an accurate understanding of what occurs before, during, and after CO (sub 2) injection. JF - Abstracts with Programs - Geological Society of America AU - Campbell, Brent D AU - Smith, Megan AU - Carroll, Susan AU - Watney, W Lynn AU - Datta, Saugata AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 288 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 30:Engineering geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668232331?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geochemical+and+experimental+investigation+to+assess+the+feasibility+of+CO+%28sub+2%29+storage+within+the+Arbuckle+Aquifer%2C+Kansas&rft.au=Campbell%2C+Brent+D%3BSmith%2C+Megan%3BCarroll%2C+Susan%3BWatney%2C+W+Lynn%3BDatta%2C+Saugata%3BAnonymous&rft.aulast=Campbell&rft.aufirst=Brent&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=288&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 - 2015-04-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Helium in California groundwater AN - 1668230132; 2015-027938 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Kulongoski, Justin T AU - Esser, Bradley K AU - Belitz, Kenneth AU - Fram, Miranda S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1331 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - volcanic rocks KW - isotopes KW - igneous rocks KW - tritium KW - stable isotopes KW - ground water KW - Cenozoic KW - California KW - sedimentary rocks KW - radioactive isotopes KW - plutonic rocks KW - noble gases KW - helium KW - geochemistry KW - degassing KW - isotope ratios KW - statistical analysis KW - hydrochemistry KW - hydrogen KW - residence time KW - testing KW - He-4/He-3 KW - crust KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668230132?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Helium+in+California+groundwater&rft.au=Kulongoski%2C+Justin+T%3BEsser%2C+Bradley+K%3BBelitz%2C+Kenneth%3BFram%2C+Miranda+S%3BAnonymous&rft.aulast=Kulongoski&rft.aufirst=Justin&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1331&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2014/uploads/abstracts/finalPDFs/A-Z.pdf 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 - 2015-04-02 N1 - SubjectsTermNotLitGenreText - California; Cenozoic; crust; degassing; geochemistry; ground water; He-4/He-3; helium; hydrochemistry; hydrogen; igneous rocks; isotope ratios; isotopes; noble gases; plutonic rocks; radioactive isotopes; residence time; sedimentary rocks; stable isotopes; statistical analysis; testing; tritium; United States; volcanic rocks ER - TY - JOUR T1 - Parametric studies of near-surface explosions AN - 1668229315; 2015-029209 AB - We have performed quasi-3D high-resolution numerical simulations of surface and underground explosions using LLNL's massively parallel eulerian hydrocode GEODYN to assess the impact of parameters such as yield, height of burst (HOB), depth of burst (DOB) and geological material on the resulting overpressure in air and seismic motions at distance. The material properties span a large spectrum from hard rock, such as granite with low porosity, to weak material, such as dry alluvium. Arrival times to surface station are determined by the shock wave propagation and the coupling of ground motion. We show that overpressures and peak velocities due to the same yield at the same scaled HOB/DOB are functionally very similar regardless the geological fabric and therefore the response can be scaled. Moreover, the impulse is calculated by integrating the initial positive pressure time-history. It was found that the functional form of the impulse as a function of scaled HOB/DOB is also consistent for emplacements above ground, at ground level and down to depths where cratering occurs regardless for all geological materials even though the material properties show drastic geomechanical variations. While the current study used numerical simulation from idealized blast and settings, additional factors can complicate observed seismic signals and bias the amplitudes and subsequent yield and HOB/DOB estimates. For example, we show that the emplacement lithology strongly impact seismic amplitudes for deeply buried explosions. Furthermore, the behavior with HOB/DOB is different for the materials considered. Results are compared with limited experimental data. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - Abstracts with Programs - Geological Society of America AU - Rodgers, Artie AU - Ezzedine, Souheil AU - Ford, Sean AU - Vorobiev, Oleg AU - Pitarka, Arben AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 161 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229315?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Parametric+studies+of+near-surface+explosions&rft.au=Rodgers%2C+Artie%3BEzzedine%2C+Souheil%3BFord%2C+Sean%3BVorobiev%2C+Oleg%3BPitarka%2C+Arben%3BAnonymous&rft.aulast=Rodgers&rft.aufirst=Artie&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=161&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 - 2015-04-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - The gadolinium and dysprosium isotopic composition of a supernova injection inferred from Allende CAIs AN - 1668228577; 2015-027406 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Brennecka, G A AU - Borg, L E AU - Wadhwa, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2280 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - solar system KW - dysprosium KW - stony meteorites KW - isotopes KW - supernovas KW - calcium-aluminum inclusions KW - thermal ionization mass spectra KW - mass spectra KW - nucleosynthesis KW - carbonaceous chondrites KW - CV chondrites KW - Allende Meteorite KW - meteorites KW - gadolinium KW - r-process KW - stars KW - metals KW - inclusions KW - composition KW - spectra KW - rare earths KW - chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668228577?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+gadolinium+and+dysprosium+isotopic+composition+of+a+supernova+injection+inferred+from+Allende+CAIs&rft.au=Brennecka%2C+G+A%3BBorg%2C+L+E%3BWadhwa%2C+M%3BAnonymous&rft.aulast=Brennecka&rft.aufirst=G&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/2280.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 - 15 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Aug. 22, 2014 N1 - Last updated - 2015-04-02 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Allende Meteorite; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; composition; CV chondrites; dysprosium; gadolinium; inclusions; isotopes; mass spectra; metals; meteorites; nucleosynthesis; r-process; rare earths; solar system; spectra; stars; stony meteorites; supernovas; thermal ionization mass spectra ER - TY - JOUR T1 - The influence of ice marginal setting on early Holocene retreat rates in West Greenland AN - 1668228108; 2015-031614 AB - Ice sheets are changing rapidly but given the historic record alone, we have a difficult time assessing the climatic impact on ice sheet change as it is filtered through complex set of processes known as 'ice dynamics'. Ice margin reconstructions that span millennia allow us to evaluate dynamic controls on ice sheet change. We present two (super 10) Be chronologies of early Holocene ice sheet retreat from West Greenland in two distinctly different ice marginal settings--a marine-based glacier setting and a land-based glacier setting. These chronologies track the retreat of the Greenland Ice Sheet along two transects in the Disko Bugt region between 12-8 ka. We use this natural laboratory to evaluate the behavior of the ice sheet margin during a period of warming climate by comparing the timing and rate of retreat between the two transects. Our results indicate similar rates of retreat of approximately 40-50 m a (super -1) from both transects during the early Holocene. In addition, seven previously published deglacial chronologies from West Greenland yield retreat rates between 10 to 65 m a (super -1) , revealing similar early Holocene retreat rates throughout West Greenland despite the high diversity in ice marginal settings. Furthermore, the retreat rates demonstrate that terrestrial sectors of ice sheets can retreat at rates comparable to their marine counterparts, a phenomenon not prevalent in the shorter observational record. This may indicate that stable land-based sectors of the Greenland Ice Sheet will potentially experience rapid recession in the future. JF - Abstracts with Programs - Geological Society of America AU - Kelley, Samuel AU - Briner, Jason P AU - Zimmerman, Susan H AU - Cronauer, Sandra AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 797 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/1668228108?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+influence+of+ice+marginal+setting+on+early+Holocene+retreat+rates+in+West+Greenland&rft.au=Kelley%2C+Samuel%3BBriner%2C+Jason+P%3BZimmerman%2C+Susan+H%3BCronauer%2C+Sandra%3BAnonymous&rft.aulast=Kelley&rft.aufirst=Samuel&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=797&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 - 2015-04-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Statistical and spatial analysis of inorganic anions, cations and radionuclides in California's groundwater; establishing a background and analyzing spatial variability AN - 1660632579; 2015-019224 AB - California's regional geological environments, such as aquifers with a granitic basement or sedimentary basins with oil reservoirs, constrain the groundwater's chemical composition. The geological complexity of California generates aquifer systems that contain a wide range of sediments, recharge mechanisms, dissolved oxygen quantities and additional regional to sub-regional geochemical differences. A spatial analysis of ten hydrologic regions provides regional average distributions of chemical constituents with respect to mixing of deeply sourced waters associated with organic sedimentary deposits and shallow groundwater used for drinking water supply. In addition, the analysis provides a representation of the patterns in background concentrations that could aid in the determination of anthropogenic effects on groundwater chemistry, including oil and gas production. The statistical and spatial analysis was conducted through inputting and interpreting a large query of supply well data into a geographic information system data frame. The primary constituents of interest are radionuclides: radium and radon and related anions and cations. Sedimentary organic deposits typically contain high concentrations of naturally occurring radioactive materials, such as (super 232) Th and (super 238) U. Furthermore, groundwater that interacts with the sedimentary organic deposits generally has high activities of (super 232) Th and (super 238) U decay products (super 228) Ra and (super 226) Ra. Previous studies have indicated that the ratio of (super 228) Ra/ (super 226) Ra in groundwater correlates with the ratio of (super 232) Th/ (super 238) U in the aquifer materials providing evidence for the source of radium in groundwater. Comparing the hydrogeologic setting and the groundwater chemistry demonstrates the usefulness of the (super 228) Ra/ (super 226) Ra ratio in the determination of the mixing of groundwater between deep-seated aquifers with shallow drinking water supply aquifers. Establishing a background database of certain anions, cations and radionuclides associated with sedimentary organic material will provide local, regional and state authorities and water-resource managers with information that could prove useful when examining future effects of conventional or non-conventional energy resource development. JF - Abstracts with Programs - Geological Society of America AU - Renshaw, Andrew M AU - Moran, Jean E AU - Esser, Brad K AU - Bibby, Richard K AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 72 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 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/1660632579?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Statistical+and+spatial+analysis+of+inorganic+anions%2C+cations+and+radionuclides+in+California%27s+groundwater%3B+establishing+a+background+and+analyzing+spatial+variability&rft.au=Renshaw%2C+Andrew+M%3BMoran%2C+Jean+E%3BEsser%2C+Brad+K%3BBibby%2C+Richard+K%3BAnonymous&rft.aulast=Renshaw&rft.aufirst=Andrew&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=72&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 - Nonproliferation nuclear forensics; the current state of the art AN - 1660629703; 2015-021395 AB - Nuclear terrorism is one of the most serious security threats facing the world today. Many countries, including the United States, have incorporated nuclear forensic analysis as an important part of their strategy to prevent nuclear terrorism and nuclear smuggling. Nonproliferation nuclear forensics involves the laboratory analysis of seized illicit nuclear materials and the interpretation of data to identify the origin and intended use of the material. Forensic signatures have been developed to improve the confidence with which nuclear forensic scientists can draw conclusions. These signatures are validated and new signatures developed through research and development programs and in round-robin exercises among nuclear forensic laboratories worldwide. Nuclear forensics involves an iterative approach based on the application of a wide array of state of the art analytical techniques. Studies of interdicted materials conducted in cooperation with government or law enforcement agencies provide the ultimate test for analytical protocols developed under controlled laboratory conditions. We illustrate the current state of nuclear forensics using case studies of interdicted nuclear materials. JF - Abstracts with Programs - Geological Society of America AU - Hutcheon, Ian D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 102 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660629703?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Nonproliferation+nuclear+forensics%3B+the+current+state+of+the+art&rft.au=Hutcheon%2C+Ian+D%3BAnonymous&rft.aulast=Hutcheon&rft.aufirst=Ian&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=102&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 - Late Pleistocene-Holocene alluvial stratigraphy of southern Baja California, Mexico AN - 1656039952; 2015-016072 AB - Pleistocene to Holocene morphostratigraphy has been established for the basins of La Paz and San Jose del Cabo, in the southern tip of the Baja California peninsula, Mexico. Six discrete morphopedosedimentary alluvial units (Qt1 through Qt6) were differentiated across the region using a combination of geomorphologic mapping, sedimentological analysis, and soil development further reinforced with geochronology using radiocarbon, optically stimulated luminescence and cosmogenic depth-profiles. A first phase of regional aggradation began before approximately 100 ka (Qt1) and culminated approximately 10 ka (Qt4). After deposition of Qt4, increasing regional incision of older units and the progressive development of a channelized alluvial landscape coincide with deposition of Qt5 and Qt6 units in a second, incisional phase. All units were deposited as multiple 1-3 m thick alluvial packages in upper-flow regimes representing individual storms. Aggradational units covered broad (>2 km) channels in the form of sheetflood deposition while incisional stage deposits are confined to channels of approximately 0.5-2 km width. Continuous deposition of the thicker sequences is demonstrated by closely spaced luminescence dates in vertical profiles, sequence that in a few places is interrupted by disconformities indicated by partly eroded buried soils. Analysis of historical terraces as part of the younger units incised into older fans show that deposition was accomplished by large tropical cyclone events. Older units feature the same sedimentological traits as these historical deposits. We interpret the whole sequence as indicating discrete periods during the Late Pleistocene and Holocene when climatic conditions allowed large tropical cyclone events that today are not expressed. These discrete periods can be associated with specific periods when (a) insolation at the Equator was at peaks determined by precessional cycles and (b) the Tropical Pacific might have shown a state similar to that currently displayed during El Nino events. JF - Abstracts with Programs - Geological Society of America AU - Antinao, Jose Luis AU - McDonald, Eric AU - Rhodes, Edward J AU - Barrera, Wendy AU - Brown, Nathan D AU - Gosse, John C AU - Zimmerman, Susan H AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 229 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/1656039952?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Late+Pleistocene-Holocene+alluvial+stratigraphy+of+southern+Baja+California%2C+Mexico&rft.au=Antinao%2C+Jose+Luis%3BMcDonald%2C+Eric%3BRhodes%2C+Edward+J%3BBarrera%2C+Wendy%3BBrown%2C+Nathan+D%3BGosse%2C+John+C%3BZimmerman%2C+Susan+H%3BAnonymous&rft.aulast=Antinao&rft.aufirst=Jose&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=229&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 - 2015-02-19 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Expanded chronology of late Pleistocene glacial events in the greater Yellowstone and Grand Teton regions AN - 1656039848; 2015-015862 AB - Records of the greater Yellowstone-Teton Range glacier systems have long served as a foundation for understanding the timing of the last (Pinedale) and penultimate (Bull Lake) glaciations for much of the Rocky Mountains. In previous investigations, we obtained >110 cosmogenic (super 3) He and (super 10) Be surface exposure ages from boulders on moraines deposited by glaciers in the Yellowstone and Grand Teton regions during the middle and late Pleistocene. These prior dating efforts established a high-resolution chronology of the Yellowstone-Teton mountain glacier complexes, but crucial aspects of the regional glacial history remain incompletely understood. For example, it is unclear whether valley glaciers in different drainages on the eastern and western sides of the Teton Range behaved synchronously. Previously developed exposure age data in Grand Teton National Park are restricted to the Cascade Canyon / Jenny Lake drainage, and therefore cannot address this question. Here we expand on the geographic coverage of prior glacial-geologic research by applying (super 10) Be exposure dating to glacial deposits in several drainages along the eastern Teton range front. Our new investigations are focused on moraines and scoured bedrock surfaces at Glacier Gulch, Avalanche Canyon, Taggart Lake, Phelps Lake, Granite Canyon, and adjacent areas. Ages are also being developed from sampled moraine boulders along a position corresponding to the Pinedale 2 phase of the southern margin of the greater Yellowstone glacial system, as well as on the west side of the Teton range crest. The expanded chronology will contribute toward an understanding of both the timing of late Pleistocene glacier events in the western U.S. and the predominant climatic influences on glaciation. Refinements in the glacial history will also provide critically important context for understanding rates and patterns of biotic responses and ecological changes during the transition from glacial to interglacial conditions. JF - Abstracts with Programs - Geological Society of America AU - Licciardi, Joseph M AU - Pierce, Kenneth L AU - Finkel, Robert C AU - Zimmerman, Susan H AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 81 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 5 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039848?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Expanded+chronology+of+late+Pleistocene+glacial+events+in+the+greater+Yellowstone+and+Grand+Teton+regions&rft.au=Licciardi%2C+Joseph+M%3BPierce%2C+Kenneth+L%3BFinkel%2C+Robert+C%3BZimmerman%2C+Susan+H%3BAnonymous&rft.aulast=Licciardi&rft.aufirst=Joseph&rft.date=2014-01-01&rft.volume=46&rft.issue=5&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, Rocky Mountain Section, 66th annual meeting; Geological Society of America, Cordilleran Section, 110th 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 - 2015-02-19 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Ventilation and stratification of the Southwest Pacific Ocean across the last glacial termination AN - 1656034508; 2015-015199 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Sikes, Elisabeth L AU - Elmore, Aurora C AU - Cook, Mea S AU - Allen, Katherine A AU - Guilderson, Thomas P AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2307 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - last glacial maximum KW - oxygen KW - Southwest Pacific KW - isotopes KW - paleo-oceanography KW - stable isotopes KW - West Pacific KW - Heinrich events KW - carbon dioxide KW - ventilation KW - Foraminifera KW - Cenozoic KW - Cibicidoides wuellerstorfi KW - carbon KW - Invertebrata KW - Australia KW - Cassidulinacea KW - high-resolution methods KW - Cibicidoides KW - Protista KW - Quaternary KW - Australasia KW - isotope ratios KW - paleoatmosphere KW - C-13/C-12 KW - Rotaliina KW - South Pacific KW - O-18/O-16 KW - deep-water environment KW - stratification KW - Pacific Ocean KW - Anomalinidae KW - New Zealand KW - microfossils KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656034508?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Ventilation+and+stratification+of+the+Southwest+Pacific+Ocean+across+the+last+glacial+termination&rft.au=Sikes%2C+Elisabeth+L%3BElmore%2C+Aurora+C%3BCook%2C+Mea+S%3BAllen%2C+Katherine+A%3BGuilderson%2C+Thomas+P%3BAnonymous&rft.aulast=Sikes&rft.aufirst=Elisabeth&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2307&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 - Anomalinidae; Australasia; Australia; C-13/C-12; carbon; carbon dioxide; Cassidulinacea; Cenozoic; Cibicidoides; Cibicidoides wuellerstorfi; deep-water environment; Foraminifera; Heinrich events; high-resolution methods; Invertebrata; isotope ratios; isotopes; last glacial maximum; microfossils; New Zealand; O-18/O-16; oxygen; Pacific Ocean; paleo-oceanography; paleoatmosphere; Protista; Quaternary; Rotaliina; South Pacific; Southwest Pacific; stable isotopes; stratification; ventilation; West Pacific ER - TY - JOUR T1 - Constraints on lunar surface temperatures form production and diffusion of cosmogenic (super 38) Ar and radiogenic (super 40) Ar AN - 1656033688; 2015-015193 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Shuster, David L AU - Cassata, William S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2301 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - silicates KW - volcanic rocks KW - isotopes KW - igneous rocks KW - Apollo Program KW - Ar-38 KW - stable isotopes KW - temperature KW - Ar-40/Ar-39 KW - radioactive isotopes KW - pyroxene group KW - whole rock KW - Ar-40 KW - quantitative analysis KW - noble gases KW - basalts KW - framework silicates KW - Ar-38/Ar-37 KW - kinetics KW - chain silicates KW - plagioclase KW - diffusion KW - Moon KW - isotope ratios KW - thermal properties KW - argon KW - Apollo 15 KW - feldspar group KW - 04:Extraterrestrial geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656033688?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Constraints+on+lunar+surface+temperatures+form+production+and+diffusion+of+cosmogenic+%28super+38%29+Ar+and+radiogenic+%28super+40%29+Ar&rft.au=Shuster%2C+David+L%3BCassata%2C+William+S%3BAnonymous&rft.aulast=Shuster&rft.aufirst=David&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2301&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 - Apollo 15; Apollo Program; Ar-38; Ar-38/Ar-37; Ar-40; Ar-40/Ar-39; argon; basalts; chain silicates; diffusion; feldspar group; framework silicates; igneous rocks; isotope ratios; isotopes; kinetics; Moon; noble gases; plagioclase; pyroxene group; quantitative analysis; radioactive isotopes; silicates; stable isotopes; temperature; thermal properties; volcanic rocks; whole rock ER - TY - JOUR T1 - Evidence for magma ocean solidification at 4.36 Ga from (super 142) Nd- (super 143) Nd variation in mare basalts AN - 1641012032; 2015-001062 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gaffney, A M AU - Borg, L E AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1449 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - volcanic rocks KW - isotopes KW - igneous rocks KW - thermal ionization mass spectra KW - mass spectra KW - stable isotopes KW - radioactive isotopes KW - chronology KW - Sm-147/Nd-144 KW - dates KW - basalts KW - absolute age KW - spectra KW - samarium KW - rare earths KW - magma oceans KW - Moon KW - isotope ratios KW - Nd-144/Nd-142 KW - Nd/Nd KW - Nd-142 KW - Nd-143 KW - metals KW - crystallization KW - neodymium KW - mare basalts KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641012032?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Evidence+for+magma+ocean+solidification+at+4.36+Ga+from+%28super+142%29+Nd-+%28super+143%29+Nd+variation+in+mare+basalts&rft.au=Gaffney%2C+A+M%3BBorg%2C+L+E%3BAnonymous&rft.aulast=Gaffney&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 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/1449.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 - 19 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 12, 2014 N1 - Last updated - 2014-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; basalts; chronology; crystallization; dates; igneous rocks; isotope ratios; isotopes; magma oceans; mare basalts; mass spectra; metals; Moon; Nd-142; Nd-143; Nd-144/Nd-142; Nd/Nd; neodymium; radioactive isotopes; rare earths; samarium; Sm-147/Nd-144; spectra; stable isotopes; thermal ionization mass spectra; volcanic rocks ER - TY - JOUR T1 - Calcium and titanium isotopic compositions of FUN CAIs; implications for their origin AN - 1641011474; 2015-002298 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Park, C AU - Nagashima, K AU - Wasserburg, G J AU - Papanastassiou, D A AU - Hutcheon, I D AU - Davis, A M AU - Huss, G R AU - Bizzarro, M AU - Krot, A N AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2656 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - FUN CAIs KW - calcium KW - stony meteorites KW - ion probe data KW - isotopes KW - calcium-aluminum inclusions KW - mass spectra KW - meteorites KW - pyroxene group KW - melting KW - clinopyroxene KW - inclusions KW - oxides KW - spectra KW - diopside KW - heterogeneity KW - chondrites KW - chain silicates KW - alkaline earth metals KW - calcium-aluminum inclusions with fractionation and unidentified nuclear effects KW - gaseous phase KW - condensation KW - homogenization KW - anomalies KW - hibonite KW - carbonaceous chondrites KW - solar nebula KW - evaporation KW - titanium KW - metals KW - CM chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011474?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+and+titanium+isotopic+compositions+of+FUN+CAIs%3B+implications+for+their+origin&rft.au=Park%2C+C%3BNagashima%2C+K%3BWasserburg%2C+G+J%3BPapanastassiou%2C+D+A%3BHutcheon%2C+I+D%3BDavis%2C+A+M%3BHuss%2C+G+R%3BBizzarro%2C+M%3BKrot%2C+A+N%3BAnonymous&rft.aulast=Park&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://www.hou.usra.edu/meetings/lpsc2014/pdf/2656.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 - 20 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on June 3, 2014 N1 - Last updated - 2014-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; anomalies; calcium; calcium-aluminum inclusions; calcium-aluminum inclusions with fractionation and unidentified nuclear effects; carbonaceous chondrites; chain silicates; chondrites; clinopyroxene; CM chondrites; condensation; diopside; evaporation; FUN CAIs; gaseous phase; heterogeneity; hibonite; homogenization; inclusions; ion probe data; isotopes; mass spectra; melting; metals; meteorites; oxides; pyroxene group; silicates; solar nebula; spectra; stony meteorites; titanium ER - TY - JOUR T1 - Mg and U isotopic systematics in Allende CAIs; implications for the origin of uranium isotopic variation in refractory inclusions AN - 1641011436; 2015-002299 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Mane, P AU - Brennecka, G A AU - Romaniello, S J AU - Wadhwa, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1685 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - isotope fractionation KW - alteration KW - magnesium KW - stony meteorites KW - isotopes KW - refractory materials KW - calcium-aluminum inclusions KW - mass spectra KW - CV chondrites KW - stable isotopes KW - Allende Meteorite KW - meteorites KW - radioactive isotopes KW - coarse-grained materials KW - Mg-25/Mg-24 KW - inclusions KW - spectra KW - heterogeneity KW - chondrites KW - Eh KW - alkaline earth metals KW - condensation KW - isotope ratios KW - anomalies KW - nucleosynthesis KW - carbonaceous chondrites KW - ICP mass spectra KW - evaporation KW - metals KW - fine-grained materials KW - uranium KW - U-238/U-235 KW - actinides KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011436?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+and+U+isotopic+systematics+in+Allende+CAIs%3B+implications+for+the+origin+of+uranium+isotopic+variation+in+refractory+inclusions&rft.au=Mane%2C+P%3BBrennecka%2C+G+A%3BRomaniello%2C+S+J%3BWadhwa%2C+M%3BAnonymous&rft.aulast=Mane&rft.aufirst=P&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/1685.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. incl. 1 table N1 - SuppNotes - Accessed on June 3, 2014 N1 - Last updated - 2014-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - actinides; alkaline earth metals; Allende Meteorite; alteration; anomalies; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; coarse-grained materials; condensation; CV chondrites; Eh; evaporation; fine-grained materials; heterogeneity; ICP mass spectra; inclusions; isotope fractionation; isotope ratios; isotopes; magnesium; mass spectra; metals; meteorites; Mg-25/Mg-24; nucleosynthesis; radioactive isotopes; refractory materials; spectra; stable isotopes; stony meteorites; U-238/U-235; uranium ER - TY - JOUR T1 - Biotransformtion of U(VI) by Caulobacter crescentus AN - 1637543528; 2014-101795 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Jiao, Yongqin AU - Yung, Mimi AU - Park, Dan AU - Bowman, Grant AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1142 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - metabolism KW - biochemistry KW - solubility KW - Caulobacter crescentus KW - precipitation KW - metals KW - bacteria KW - anaerobic environment KW - uranium KW - geochemistry KW - actinides KW - microorganisms KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637543528?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Biotransformtion+of+U%28VI%29+by+Caulobacter+crescentus&rft.au=Jiao%2C+Yongqin%3BYung%2C+Mimi%3BPark%2C+Dan%3BBowman%2C+Grant%3BAnonymous&rft.aulast=Jiao&rft.aufirst=Yongqin&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1142&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2014/uploads/abstracts/finalPDFs/A-Z.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-12-18 N1 - SubjectsTermNotLitGenreText - actinides; anaerobic environment; bacteria; biochemistry; Caulobacter crescentus; geochemistry; metabolism; metals; microorganisms; precipitation; solubility; uranium ER - TY - JOUR T1 - Initial results from the Kwajalein micrometeorite collections AN - 1637543519; 2014-101619 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Wozniakiewicz, P J AU - Bradley, J P AU - Price, M C AU - Zolensky, M E AU - Ishii, H A AU - Brownlee, Donald E AU - Dearborn, D AU - Jones, T AU - Barnett, B AU - Yakuma, S AU - Letendre, T AU - Gonzalez, C AU - Bastien, R AU - Rodriguez, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1823 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - collecting KW - separation KW - X-ray spectra KW - EDS spectra KW - micrometeorites KW - meteorites KW - sample preparation KW - sampling KW - Oceania KW - oxides KW - Micronesia KW - Marshall Islands KW - air KW - spectra KW - Kwajalein Atoll KW - winds KW - SEM data KW - collections KW - spherules KW - magnetite KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637543519?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Initial+results+from+the+Kwajalein+micrometeorite+collections&rft.au=Wozniakiewicz%2C+P+J%3BBradley%2C+J+P%3BPrice%2C+M+C%3BZolensky%2C+M+E%3BIshii%2C+H+A%3BBrownlee%2C+Donald+E%3BDearborn%2C+D%3BJones%2C+T%3BBarnett%2C+B%3BYakuma%2C+S%3BLetendre%2C+T%3BGonzalez%2C+C%3BBastien%2C+R%3BRodriguez%2C+M%3BAnonymous&rft.aulast=Wozniakiewicz&rft.aufirst=P&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/1823.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 - 7 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on July 17, 2014 N1 - Last updated - 2014-12-18 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - air; collecting; collections; EDS spectra; Kwajalein Atoll; magnetite; Marshall Islands; meteorites; micrometeorites; Micronesia; Oceania; oxides; sample preparation; sampling; SEM data; separation; spectra; spherules; winds; X-ray spectra ER - TY - JOUR T1 - A combined computational/theoretical approach to extending impact scaling formulas AN - 1637542801; 2014-101645 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Wasem, J V AU - Schill, W AU - Owen, J M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2557 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - cratering KW - fragmentation KW - numerical models KW - impact features KW - impacts KW - simulation KW - ejecta KW - theoretical studies KW - size distribution KW - scale models KW - hypervelocity impacts KW - hydrodynamics KW - impact craters KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542801?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+combined+computational%2Ftheoretical+approach+to+extending+impact+scaling+formulas&rft.au=Wasem%2C+J+V%3BSchill%2C+W%3BOwen%2C+J+M%3BAnonymous&rft.aulast=Wasem&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/2557.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 - 10 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on July 21, 2014 N1 - Last updated - 2014-12-18 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - cratering; ejecta; fragmentation; hydrodynamics; hypervelocity impacts; impact craters; impact features; impacts; numerical models; scale models; simulation; size distribution; theoretical studies ER - TY - JOUR T1 - Neodymium isotopic evolution of the solar system inferred from isochron studies of planetary materials AN - 1629940350; 2014-096455 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Borg, L AU - Brennecka, G AU - Marks, N AU - Symes, S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1037 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - stony meteorites KW - isotopes KW - Sm-146 KW - calcium-aluminum inclusions KW - Mars KW - stable isotopes KW - meteorites KW - radioactive isotopes KW - Sm-147/Nd-144 KW - dates KW - inclusions KW - absolute age KW - samarium KW - rare earths KW - chondrites KW - solar system KW - Sm-146/Sm-144 KW - Earth KW - Moon KW - isotope ratios KW - isochrons KW - terrestrial planets KW - Nd-144/Nd-143 KW - planets KW - lunar samples KW - Nd-144/Nd-142 KW - Sm/Nd KW - metals KW - lunar mantle KW - neodymium KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940350?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Neodymium+isotopic+evolution+of+the+solar+system+inferred+from+isochron+studies+of+planetary+materials&rft.au=Borg%2C+L%3BBrennecka%2C+G%3BMarks%2C+N%3BSymes%2C+S%3BAnonymous&rft.aulast=Borg&rft.aufirst=L&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/1037.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. 12, 2014 N1 - Last updated - 2014-12-04 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; calcium-aluminum inclusions; chondrites; dates; Earth; inclusions; isochrons; isotope ratios; isotopes; lunar mantle; lunar samples; Mars; metals; meteorites; Moon; Nd-144/Nd-142; Nd-144/Nd-143; neodymium; planets; radioactive isotopes; rare earths; samarium; Sm-146; Sm-146/Sm-144; Sm-147/Nd-144; Sm/Nd; solar system; stable isotopes; stony meteorites; terrestrial planets ER - TY - JOUR T1 - WPEC SG38: Designing a New Format for Storing Nuclear Data AN - 1567063787; 20432501 AB - The Evaluated Nuclear Data Format (ENDF) has been used for nearly 50 years to store and exchange evaluated nuclear data [1], It provides a standard, computer-readable format where nuclear scientists and engineers can store data such as reaction cross-sections, outgoing energy and angle distributions for reaction products, thermal scattering parameters, and covariances. Data stored in ENDF serve as inputs for a variety of other codes, and can be processed into other formats for use in simulation codes such as MCNP [2], ENDF therefore serves as a standard way for nuclear scientists and engineers to provide recommended nuclear reaction data for use in reactor design and other applications. JF - Transactions of the American Nuclear Society AU - Mattoon, C M AU - Beck, B R AD - Lawrence Livermore National Laboratory: 7000 East Ave L-059, Livermore, CA, 94550 mattoon1@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 561 EP - 563 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 - Format KW - Scientists KW - Exchange KW - Energy (nuclear) KW - Standards KW - Stores KW - Cross sections UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567063787?accountid=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=WPEC+SG38%3A+Designing+a+New+Format+for+Storing+Nuclear+Data&rft.au=Mattoon%2C+C+M%3BBeck%2C+B+R&rft.aulast=Mattoon&rft.aufirst=C&rft.date=2014-01-01&rft.volume=110&rft.issue=&rft.spage=561&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 - FUDGE: A Toolkit for Nuclear Data Management and Processing AN - 1567056173; 20432502 AB - For over 50 years the Evaluated Nuclear Data File (ENDF) [1] format has been used for storing and sharing evaluated nuclear reaction data. Processing codes like NJOY [2] and AMPX [3] are used to transform ENDF formatted data into forms useful for reactor, medical and other transport codes. For example, NJOY can be used to produce ACE files used by the transport code MCNP [4], With all of its advantages, the ENDF format has limitations as it was developed in the era of punchcards, small (kilo-bytes) memory computers and limited storage capacity that restricted its design. Furthermore, computer software technology has made significant advances over the last 50 years. To address ENDF's limitations, an international committee (OECD/NEA WPEC sub-group 38) [5] has been working since December 2012 to design a modem format, tentatively called GND, to replace the ENDF format. JF - Transactions of the American Nuclear Society AU - Beck, B R AU - Mattoon, C M AD - Lawrence Livermore National Laboratory, L-059, P.O. Box 800, Livermore, CA 94551 beck6@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 564 EP - 567 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 - Storage capacity KW - Nuclear reactions KW - Computer programs KW - Format KW - Transport KW - Transaction processing KW - Tools KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567056173?accountid=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=FUDGE%3A+A+Toolkit+for+Nuclear+Data+Management+and+Processing&rft.au=Beck%2C+B+R%3BMattoon%2C+C+M&rft.aulast=Beck&rft.aufirst=B&rft.date=2014-01-01&rft.volume=110&rft.issue=&rft.spage=564&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 - Application of Performance Metrics in Assessing the LLNL Nuclear Criticality Safety Program AN - 1562667361; 20432444 AB - The method of using a performance metric system was introduced in FY2000 to measure the Lawrence Livermore National Laboratory (LLNL) nuclear criticality safety program. This practice has continued to this date. So we have about 14 years of experience with this measurement system. The purposes of this paper are (1) to report the metrics used for many years, and (2) to discuss why the metric system works in our application. JF - Transactions of the American Nuclear Society AU - Heinrichs, David AU - Huang, Song AU - Lee, Mark AD - Lawrence Livermore National Laboratory, P. O. Box 808, Livermore, CA 94551, heinrichs1@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 317 EP - 319 PB - American Nuclear Society, Inc. VL - 110 SN - 0003-018X, 0003-018X KW - Health & Safety Science Abstracts KW - Safety KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1562667361?accountid=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=Application+of+Performance+Metrics+in+Assessing+the+LLNL+Nuclear+Criticality+Safety+Program&rft.au=Heinrichs%2C+David%3BHuang%2C+Song%3BLee%2C+Mark&rft.aulast=Heinrichs&rft.aufirst=David&rft.date=2014-01-01&rft.volume=110&rft.issue=&rft.spage=317&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 - Safety ER - TY - JOUR T1 - Rapidly solidified U-6 wt%Nb powders for dispersion-type nuclear fuels AN - 1560101858; 20432996 AB - The microstructures of U-6 wt%Nb powder particles were investigated to assess their use as a distributed fuel phase in dispersion-type nuclear fuels. The powder was produced by centrifugal atomization, leading to rapid solidification of the molten alloy particles. The microstructure of the solidified particles consisted of a dendritic structure comprising metastable ct-phase-related dendrites and interdendritic metastable y~ phase formation. The relationship between the observed microstructure and processing conditions are discussed. JF - Journal of Nuclear Materials AU - McKeown, Joseph T AU - Hsiung, Luke L AU - Ryu, Ho Jin AU - Park, Jong Man AU - Turchi, Patrice EA AU - King, Wayne E AD - Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, mckeown3@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 72 EP - 79 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 - Uranium base alloys KW - U-6Nb KW - Fuels KW - Nuclear fuels KW - Radioactive materials KW - Solidification KW - Alloys KW - Particulates KW - Dendrites KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560101858?accountid=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=Rapidly+solidified+U-6+wt%25Nb+powders+for+dispersion-type+nuclear+fuels&rft.au=McKeown%2C+Joseph+T%3BHsiung%2C+Luke+L%3BRyu%2C+Ho+Jin%3BPark%2C+Jong+Man%3BTurchi%2C+Patrice+EA%3BKing%2C+Wayne+E&rft.aulast=McKeown&rft.aufirst=Joseph&rft.date=2014-01-01&rft.volume=448&rft.issue=1-3&rft.spage=72&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.01.033 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 41 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Fuels; Radioactive materials; Nuclear fuels; Alloys; Solidification; Dendrites; Particulates DO - http://dx.doi.org/10.1016/j.jnucmat.2014.01.033 ER - TY - JOUR T1 - Simulate_PCR for amplicon prediction and annotation from multiplex, degenerate primers and probes AN - 1551615034; 20392389 AB - Background: Pairing up primers to amplify desired targets and avoid undesired cross reactions can be a combinatorial challenge. Effective prediction of specificity and inclusivity from multiplexed primers and TaqMan registered /Luminex registered probes is a critical step in PCR design. Results: Code is described to identify all primer and probe combinations from a list of unpaired, unordered candidates that should produce a product. It predicts and extracts all amplicon sequences in a large sequence database from a list of primers and probes, allowing degenerate bases and user-specified levels of primer-target mismatch tolerance. Amplicons hit by TaqMan registered /Luminex registered probes are indicated, and products may be annotated with gene information from NCBI. Fragment length distributions are calculated to predict electrophoretic gel banding patterns. Conclusions: Simulate_PCR is the only freely available software that can be run from the command line for high throughput applications which can calculate all products from large lists of primers and probes compared to a large sequence database such as nt. It requires no prior knowledge of how primers should be paired. Degenerate bases are allowed and entire amplicon sequences are extracted and annotated with gene information. Examples are provided for sets of TaqMan registered /Luminex registered PCR signatures predicted to amplify all HIV-1 genomes, all Coronaviridae genomes, and a group of antibiotic resistance genes. The software is a command line perl script freely available as open source. JF - BMC Bioinformatics AU - Gardner, Shea N AU - Slezak, Tom AD - Computations/Global Security, Lawrence Livermore National Laboratory (LLNL), Livermore, CA 94550, USA Y1 - 2014 PY - 2014 DA - 2014 SP - 237 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 - Genomes KW - Computer programs KW - Databases KW - software KW - Coronaviridae KW - DNA probes KW - Human immunodeficiency virus 1 KW - Polymerase chain reaction KW - Primers KW - Bioinformatics KW - Antibiotic resistance KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1551615034?accountid=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=Simulate_PCR+for+amplicon+prediction+and+annotation+from+multiplex%2C+degenerate+primers+and+probes&rft.au=Gardner%2C+Shea+N%3BSlezak%2C+Tom&rft.aulast=Gardner&rft.aufirst=Shea&rft.date=2014-01-01&rft.volume=15&rft.issue=1&rft.spage=237&rft.isbn=&rft.btitle=&rft.title=BMC+Bioinformatics&rft.issn=14712105&rft_id=info:doi/10.1186%2F1471-2105-15-237 L2 - http://www.biomedcentral.com/1471-2105/15/237 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Number of references - 14 N1 - Last updated - 2014-08-21 N1 - SubjectsTermNotLitGenreText - Genomes; Databases; Computer programs; software; DNA probes; Polymerase chain reaction; Primers; Bioinformatics; Antibiotic resistance; Coronaviridae; Human immunodeficiency virus 1 DO - http://dx.doi.org/10.1186/1471-2105-15-237 ER - TY - JOUR T1 - A young differentiation age for Mars deduced from high-precision (super 142) Nd analyses of Martian meteorites AN - 1549617715; 2014-060150 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Symes, S J K AU - Borg, L E AU - Brennecka, G A AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2063 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - volcanic rocks KW - stony meteorites KW - isotopes KW - Martian meteorites KW - igneous rocks KW - Mars KW - stable isotopes KW - SNC Meteorites KW - meteorites KW - radioactive isotopes KW - Sm-147/Nd-144 KW - dates KW - basalts KW - absolute age KW - samarium KW - rare earths KW - accretion KW - isotope ratios KW - differentiation KW - isochrons KW - achondrites KW - terrestrial planets KW - Nd-144/Nd-143 KW - planets KW - Nd-144/Nd-142 KW - shergottite KW - Nd/Nd KW - Sm/Nd KW - metals KW - mathematical methods KW - crystallization KW - core KW - neodymium KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617715?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+young+differentiation+age+for+Mars+deduced+from+high-precision+%28super+142%29+Nd+analyses+of+Martian+meteorites&rft.au=Symes%2C+S+J+K%3BBorg%2C+L+E%3BBrennecka%2C+G+A%3BAnonymous&rft.aulast=Symes&rft.aufirst=S+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/2063.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 - 8 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 6, 2014 N1 - Last updated - 2014-07-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; accretion; achondrites; basalts; core; crystallization; dates; differentiation; igneous rocks; isochrons; isotope ratios; isotopes; Mars; Martian meteorites; mathematical methods; metals; meteorites; Nd-144/Nd-142; Nd-144/Nd-143; Nd/Nd; neodymium; planets; radioactive isotopes; rare earths; samarium; shergottite; Sm-147/Nd-144; Sm/Nd; SNC Meteorites; stable isotopes; stony meteorites; terrestrial planets; volcanic rocks ER - TY - JOUR T1 - Vaporization of planetesimal cores during accretion AN - 1549617684; 2014-060181 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Kraus, R G AU - Root, S AU - Lemke, R W AU - Stewart, S T AU - Jacobsen, S B AU - Mattsson, T R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2888 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - experimental studies KW - shock waves KW - Hugoniot analysis KW - Earth KW - accretion KW - pressure KW - Moon KW - entropy KW - siderophile elements KW - planetesimals KW - impacts KW - high pressure KW - iron KW - volatilization KW - metals KW - volume KW - velocity KW - planetology KW - core KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617684?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Vaporization+of+planetesimal+cores+during+accretion&rft.au=Kraus%2C+R+G%3BRoot%2C+S%3BLemke%2C+R+W%3BStewart%2C+S+T%3BJacobsen%2C+S+B%3BMattsson%2C+T+R%3BAnonymous&rft.aulast=Kraus&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 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/2888.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 - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Apr. 25, 2014 N1 - Last updated - 2014-07-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - accretion; core; Earth; entropy; experimental studies; high pressure; Hugoniot analysis; impacts; iron; metals; Moon; planetesimals; planetology; pressure; shock waves; siderophile elements; velocity; volatilization; volume ER - TY - JOUR T1 - Oxygen isotopes in fine-grained spinel-pyroxene and melilite-rich CAIs in the ALHA 77307 CO3.0 carbonaceous chondrite AN - 1549617406; 2014-060166 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Jacobsen, B AU - Han, J M AU - Matzel, J E P AU - Brearley, A J AU - Hutcheon, I D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2789 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - sorosilicates KW - silicates KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - calcium-aluminum inclusions KW - mass spectra KW - thermal history KW - protoplanetary disk KW - stable isotopes KW - CO chondrites KW - meteorites KW - melilite group KW - pyroxene group KW - melilite KW - transport KW - inclusions KW - orthosilicates KW - ALHA 77307 KW - oxides KW - spectra KW - chondrites KW - O-17/O-16 KW - chain silicates KW - isotope ratios KW - spinel KW - carbonaceous chondrites KW - metamorphism KW - solar nebula KW - Allan Hills Meteorites KW - petrography KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617406?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Oxygen+isotopes+in+fine-grained+spinel-pyroxene+and+melilite-rich+CAIs+in+the+ALHA+77307+CO3.0+carbonaceous+chondrite&rft.au=Jacobsen%2C+B%3BHan%2C+J+M%3BMatzel%2C+J+E+P%3BBrearley%2C+A+J%3BHutcheon%2C+I+D%3BAnonymous&rft.aulast=Jacobsen&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/2789.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 - 10 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Apr. 24, 2014 N1 - Last updated - 2014-07-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - ALHA 77307; Allan Hills Meteorites; calcium-aluminum inclusions; carbonaceous chondrites; chain silicates; chondrites; CO chondrites; inclusions; ion probe data; isotope ratios; isotopes; mass spectra; melilite; melilite group; metamorphism; meteorites; O-17/O-16; orthosilicates; oxides; oxygen; petrography; protoplanetary disk; pyroxene group; silicates; solar nebula; sorosilicates; spectra; spinel; stable isotopes; stony meteorites; thermal history; transport ER - TY - JOUR T1 - Heterogeneous oxygen isotopic composition of a complex Wark-Lovering rim and the margin of a refractory inclusion from Leoville AN - 1549617401; 2014-060165 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Simon, J I AU - Matzel, J E P AU - Simon, S B AU - Weber, P K AU - Grossman, L AU - Ross, D K AU - Hutcheon, I D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1233 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - sorosilicates KW - silicates KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - refractory materials KW - calcium-aluminum inclusions KW - mass spectra KW - CV chondrites KW - stable isotopes KW - Si-28 KW - meteorites KW - melilite group KW - pyroxene group KW - clinopyroxene KW - melilite KW - Wark-Lovering rims KW - inclusions KW - orthosilicates KW - oxides KW - spectra KW - diopside KW - heterogeneity KW - chondrites KW - zoning KW - O-17/O-16 KW - chain silicates KW - Leoville Meteorite KW - isotope ratios KW - spinel KW - carbonaceous chondrites KW - NanoSIMS KW - O-16 KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617401?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Heterogeneous+oxygen+isotopic+composition+of+a+complex+Wark-Lovering+rim+and+the+margin+of+a+refractory+inclusion+from+Leoville&rft.au=Simon%2C+J+I%3BMatzel%2C+J+E+P%3BSimon%2C+S+B%3BWeber%2C+P+K%3BGrossman%2C+L%3BRoss%2C+D+K%3BHutcheon%2C+I+D%3BAnonymous&rft.aulast=Simon&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/1233.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 - 19 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Apr. 24, 2014 N1 - Last updated - 2014-07-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - calcium-aluminum inclusions; carbonaceous chondrites; chain silicates; chondrites; clinopyroxene; CV chondrites; diopside; heterogeneity; inclusions; ion probe data; isotope ratios; isotopes; Leoville Meteorite; mass spectra; melilite; melilite group; meteorites; NanoSIMS; O-16; O-17/O-16; orthosilicates; oxides; oxygen; pyroxene group; refractory materials; Si-28; silicates; sorosilicates; spectra; spinel; stable isotopes; stony meteorites; Wark-Lovering rims; zoning ER - TY - JOUR T1 - Development of a native Escherichia coli induction system for ionic liquid tolerance. AN - 1542651005; 24983352 AB - The ability to solubilize lignocellulose makes certain ionic liquids (ILs) very effective reagents for pretreating biomass prior to its saccharification for biofuel fermentation. However, residual IL in the aqueous sugar solution can inhibit the growth and function of biofuel-producing microorganisms. In E. coli this toxicity can be partially overcome by the heterologous expression of an IL efflux pump encoded by eilA from Enterobacter lignolyticus. In the present work, we used microarray analysis to identify native E. coli IL-inducible promoters and develop control systems for regulating eilA gene expression. Three candidate promoters, PmarR', PydfO', and PydfA', were selected and compared to the IPTG-inducible PlacUV5 system for controlling expression of eilA. The PydfA' and PmarR' based systems are as effective as PlacUV5 in their ability to rescue E. coli from typically toxic levels of IL, thereby eliminating the need to use an IPTG-based system for such tolerance engineering. We present a mechanistic model indicating that inducible control systems reduce target gene expression when IL levels are low. Selected-reaction monitoring mass spectrometry analysis revealed that at high IL concentrations EilA protein levels were significantly elevated under the control of PydfA' and PmarR' in comparison to the other promoters. Further, in a pooled culture competition designed to determine fitness, the strain containing pPmarR'-eilA outcompeted strains with other promoter constructs, most significantly at IL concentrations above 150 mM. These results indicate that native promoters such as PmarR' can provide effective systems for regulating the expression of heterologous genes in host engineering and simplify the development of industrially useful strains. JF - PloS one AU - Frederix, Marijke AU - Hütter, Kimmo AU - Leu, Jessica AU - Batth, Tanveer S AU - Turner, William J AU - Rüegg, Thomas L AU - Blanch, Harvey W AU - Simmons, Blake A AU - Adams, Paul D AU - Keasling, Jay D AU - Thelen, Michael P AU - Dunlop, Mary J AU - Petzold, Christopher J AU - Mukhopadhyay, Aindrila AD - Joint BioEnergy Institute, Emeryville, California, United States of America; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, United States of America. ; School of Engineering, University of Vermont, Burlington, Vermont, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Botanical Institute, University of Basel, Basel, Switzerland; Biology and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, United States of America; Department of Chemistry, College of Chemistry, University of California, Berkeley, California, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Biological and Materials Science Center, Sandia National Laboratories, Livermore, California, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, United States of America; Department of Chemistry, College of Chemistry, University of California, Berkeley, California, United States of America; Department of Chemical & Biomolecular Engineering, College of Chemistry, University of California, Berkeley, California, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Biology and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, United States of America. Y1 - 2014 PY - 2014 DA - 2014 SP - 1 VL - 9 IS - 7 KW - EilA protein, E coli KW - 0 KW - Escherichia coli Proteins KW - Ionic Liquids KW - RNA, Bacterial KW - Index Medicus KW - Promoter Regions, Genetic KW - RNA, Bacterial -- genetics KW - Transcriptome KW - Escherichia coli Proteins -- genetics KW - Ionic Liquids -- pharmacology KW - Escherichia coli -- drug effects KW - Escherichia coli -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542651005?accountid=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=Development+of+a+native+Escherichia+coli+induction+system+for+ionic+liquid+tolerance.&rft.au=Sleiman%2C+Mohamad%3BBan-Weiss%2C+George%3BGilbert%2C+Haley+E%3BFrancois%2C+David%3BBerdahl%2C+Paul%3BKirchstetter%2C+Thomas+W%3BDestaillats%2C+Hugo%3BLevinson%2C+Ronnen&rft.aulast=Sleiman&rft.aufirst=Mohamad&rft.date=2011-12-01&rft.volume=95&rft.issue=12&rft.spage=3385&rft.isbn=&rft.btitle=&rft.title=Solar+Energy+Materials+and+Solar+Cells&rft.issn=09270248&rft_id=info:doi/10.1016%2Fj.solmat.2011.08.002 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-12-03 N1 - Date created - 2014-07-02 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Mol Gen Genet. 1999 Sep;262(2):342-50 [10517331] J Bacteriol. 1997 Oct;179(19):6122-6 [9324261] Curr Issues Mol Biol. 2006 Jan;8(1):51-62 [16450885] Nat Methods. 2006 Aug;3(8):623-8 [16862137] Mol Cell Proteomics. 2007 Sep;6(9):1527-50 [17446557] J Hazard Mater. 2008 Feb 28;151(1):268-73 [18063302] J Mol Biol. 2008 Mar 28;377(3):655-67 [18272181] Biotechnol Bioeng. 2009 Sep 1;104(1):68-75 [19489027] PLoS One. 2009;4(7):e6441 [19649325] BMC Biotechnol. 2009;9:97 [19939278] Cell. 2010 Jan 8;140(1):19-23 [20085699] Water Res. 2010 Jan;44(2):352-72 [19854462] Bioinformatics. 2010 Apr 1;26(7):966-8 [20147306] Appl Microbiol Biotechnol. 2010 Jun;87(1):117-26 [20182710] Bioresour Technol. 2010 Dec;101(23):8923-30 [20667722] J Bacteriol. 2010 Sep;192(18):4786-9 [20639340] Nat Struct Mol Biol. 2011 Mar;18(3):262-9 [21317898] Metab Eng. 2011 Mar;13(2):194-203 [21215324] Nat Commun. 2010;1:147 [21266997] Biotechnol Bioeng. 2011 Jun;108(6):1229-45 [21337342] Mol Syst Biol. 2011 May 10;7:487 [21556065] BMC Mol Biol. 2011;12:18 [21513543] Proc Natl Acad Sci U S A. 2012 Aug 7;109(32):E2173-82 [22586090] Nat Biotechnol. 2013 Nov;31(11):1039-46 [24142050] Nat Commun. 2014;5:3490 [24667370] J Bacteriol. 2000 Jun;182(12):3467-74 [10852879] Semin Cell Dev Biol. 2001 Jun;12(3):225-37 [11428915] Methods. 2001 Dec;25(4):402-8 [11846609] Mol Microbiol. 2002 Jun;44(6):1611-24 [12067348] J Mol Biol. 1991 Jul 5;220(1):35-48 [1712397] J Biol Chem. 1992 Dec 5;267(34):24253-8 [1447175] J Bacteriol. 1995 May;177(9):2305-14 [7730258] Bioresour Technol. 2005 Dec;96(18):2026-32 [16112491] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1371/journal.pone.0101115 ER - TY - JOUR T1 - Enhanced lithiation and fracture behavior of silicon mesoscale pillars via atomic layer coatings and geometry design AN - 1540225316; 19975152 AB - Crystalline silicon nanostructures are commonly known to exhibit anisotropic expansion behavior during the lithiation that leads to grooving and fracture. Here we report surprisingly relatively uniform volume expansion behavior of large aspect-ratio ( ~ 25), well-patterned, n-type (100) silicon micropillars ( ~ 2 [mu]m diameter) during the initial lithiation. The comparison results with and without atomic layer metal oxides (Al sub(2)O sub(3) and TiO sub(2)) coatings reveal drastically enhanced solid electrolyte interphase (SEI) formation, higher volume expansion, and increased anisotropy. Square-pillars are found to exhibit nearly twice volume expansion without fracture compared to circular-pillars. Models are invoked to qualitatively address these beneficial or detrimental properties of silicon for lithium ion battery. Our experiments and computer simulations point at the critical relevance of SEI and pristine geometry in regulating volume expansion and failure. ALD-coated ultrathin metal oxides can act as an ion channel gate that helps promote fast Li super(+) transport into the bulk by changing the surface kinetics, suggesting new ways of designing electrodes for high-performance lithium ion battery applications. JF - Journal of Power Sources AU - Ye, J C AU - An, Y H AU - Heo, T W AU - Biener, M M AU - Nikolic, R J AU - Tang, M AU - Jiang, H AU - Wang, Y M AD - Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, ymwang@llnl.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 447 EP - 456 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 248 SN - 0378-7753, 0378-7753 KW - Environment Abstracts KW - Metals KW - Silicon KW - Electrolytes KW - Batteries KW - Behavior KW - Kinetics KW - Electrodes KW - Simulation KW - Lithium KW - Coatings KW - Design KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1540225316?accountid=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+Power+Sources&rft.atitle=Enhanced+lithiation+and+fracture+behavior+of+silicon+mesoscale+pillars+via+atomic+layer+coatings+and+geometry+design&rft.au=Ye%2C+J+C%3BAn%2C+Y+H%3BHeo%2C+T+W%3BBiener%2C+M+M%3BNikolic%2C+R+J%3BTang%2C+M%3BJiang%2C+H%3BWang%2C+Y+M&rft.aulast=Ye&rft.aufirst=J&rft.date=2014-01-01&rft.volume=248&rft.issue=&rft.spage=447&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/10.1016%2Fj.jpowsour.2013.09.097 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Metals; Electrolytes; Silicon; Behavior; Batteries; Kinetics; Electrodes; Simulation; Lithium; Design; Coatings DO - http://dx.doi.org/10.1016/j.jpowsour.2013.09.097 ER - TY - JOUR T1 - Land-atmosphere coupling manifested in warm-season observations on the U.S. southern great plains AN - 1520374081; 19625798 AB - This study examines several observational aspects of land-atmosphere coupling on daily average time scales during warm seasons of the years 1997 to 2008 at the Department of Energy Atmospheric Radiation Measurement Program's Southern Great Plains (SGP) Central Facility site near Lamont, Oklahoma. Characteristics of the local land-atmosphere coupling are inferred by analyzing the covariability of selected land and atmospheric variables that include precipitation and soil moisture, surface air temperature, relative humidity, radiant and turbulent fluxes, as well as low-level cloud base height and fractional coverage. For both the energetic and hydrological aspects of this coupling, it is found that large-scale atmospheric forcings predominate, with local feedbacks of the land on the atmosphere being comparatively small much of the time. The relatively weak land feedbacks are manifested especially by (1) the inability of soil moisture to comprehensively impact the coupled land-atmosphere energetics and (2) the limited recycling of local surface moisture under conditions where most of the rainfall derives from convective cells that originate at remote locations. There is some evidence, nevertheless, that the local land feedback becomes stronger as the soil dries out in the aftermath of precipitation events, or on days when the local boundary layer clouds are influenced by thermal updrafts associated with convection that originates at the surface. Potential implications of these results for climate-model representation of regional land-atmosphere coupling also are discussed. Key Points * Statistically significant SGP land-atmosphere interactions occur * Atmospheric forcings predominate over land feedbacks * Land feedbacks grow stronger as the soil becomes drier JF - Journal of Geophysical Research: Atmospheres AU - Phillips, Thomas J AU - Klein, Stephen A AD - Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 509 EP - 528 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 2 SN - 2169-897X, 2169-897X KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Land/atmosphere interactions KW - Relative humidity KW - Convection KW - Moisture KW - Statistical analysis KW - Convection development KW - Soil Water KW - Recycling KW - Updrafts KW - Relative Humidity KW - Air temperature KW - USA, Oklahoma KW - Radiation KW - USA, Oklahoma, Lamont KW - Hydrologic analysis KW - Convective cells KW - Atmospheric radiation measurements KW - Climate KW - Warm seasons KW - Precipitation KW - Atmosphere-hydrologic coupled models KW - Clouds KW - Turbulent fluxes KW - Boundary layers KW - Atmospheric forcing KW - Moisture Content KW - Downward long wave radiation KW - Soil moisture KW - Land-atmosphere interaction KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 5040:Data acquisition KW - AQ 00005:Underground Services and Water Use KW - M2 556.14:Infiltration/Soil Moisture (556.14) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520374081?accountid=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+Geophysical+Research%3A+Atmospheres&rft.atitle=Land-atmosphere+coupling+manifested+in+warm-season+observations+on+the+U.S.+southern+great+plains&rft.au=Phillips%2C+Thomas+J%3BKlein%2C+Stephen+A&rft.aulast=Phillips&rft.aufirst=Thomas&rft.date=2014-01-01&rft.volume=119&rft.issue=2&rft.spage=509&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD020492 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Convection; Clouds; Relative humidity; Boundary layers; Climate; Atmospheric forcing; Downward long wave radiation; Air temperature; Hydrologic analysis; Convective cells; Atmospheric radiation measurements; Statistical analysis; Convection development; Warm seasons; Precipitation; Updrafts; Atmosphere-hydrologic coupled models; Turbulent fluxes; Land-atmosphere interaction; Soil moisture; Moisture; Radiation; Moisture Content; Soil Water; Recycling; Relative Humidity; USA, Oklahoma; USA, Oklahoma, Lamont DO - http://dx.doi.org/10.1002/2013JD020492 ER - TY - JOUR T1 - Geochemistry summary AN - 1510397540; 2014-022189 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 7 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - oceanic crust KW - alteration KW - volcanic rocks KW - Northeast Pacific KW - igneous rocks KW - olivine gabbro KW - gabbronorite KW - cores KW - plutonic rocks KW - major elements KW - IODP Site U1415 KW - basalts KW - drilling KW - trace elements KW - geochemistry KW - East Pacific KW - concentration KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - boreholes KW - troctolite KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - Hess Deep KW - Expedition 345 KW - gabbros KW - crust 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/1510397540?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Geochemistry+summary&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.114.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 21 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - alteration; basalts; boreholes; concentration; cores; crust; drilling; East Pacific; Equatorial Pacific; Expedition 345; gabbronorite; gabbros; geochemistry; Hess Deep; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1415; major elements; marine drilling; North Pacific; Northeast Pacific; oceanic crust; olivine gabbro; Pacific Ocean; plutonic rocks; trace elements; troctolite; volcanic rocks DO - http://dx.doi.org/10.2204/iodp.proc.345.114.2014 ER - TY - JOUR T1 - Analysis of core saw cuttings AN - 1510397487; 2014-022190 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 4 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - oceanic crust KW - East Pacific KW - Northeast Pacific KW - X-ray diffraction data KW - igneous rocks KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - cuttings KW - cores KW - size KW - plutonic rocks KW - mineral composition KW - boreholes KW - IODP Site U1415 KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - Hess Deep KW - Expedition 345 KW - drilling KW - chemical composition KW - crust 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/1510397487?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Analysis+of+core+saw+cuttings&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.115.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 1 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - boreholes; chemical composition; cores; crust; cuttings; drilling; East Pacific; Equatorial Pacific; Expedition 345; Hess Deep; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1415; marine drilling; mineral composition; North Pacific; Northeast Pacific; oceanic crust; Pacific Ocean; plutonic rocks; size; X-ray diffraction data DO - http://dx.doi.org/10.2204/iodp.proc.345.115.2014 ER - TY - JOUR T1 - Hole U1415P AN - 1510397426; 2014-022188 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 106 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - oceanic crust KW - alteration KW - Northeast Pacific KW - igneous rocks KW - olivine gabbro KW - microstructure KW - thin sections KW - cores KW - magnetic properties KW - plutonic rocks KW - IODP Site U1415 KW - mineral assemblages KW - drilling KW - geochemistry KW - East Pacific KW - petrology KW - well logs KW - paleomagnetism KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - veins KW - metamorphism KW - physical properties KW - boreholes KW - troctolite KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - magnetic susceptibility KW - Hess Deep KW - Expedition 345 KW - gabbros KW - crust KW - anisotropy KW - 18:Solid-earth geophysics KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397426?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Hole+U1415P&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.113.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 34 N1 - PubXState - DC N1 - Document feature - illus. incl. 13 tables N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - alteration; anisotropy; boreholes; cores; crust; drilling; East Pacific; Equatorial Pacific; Expedition 345; gabbros; geochemistry; Hess Deep; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1415; magnetic properties; magnetic susceptibility; marine drilling; metamorphism; microstructure; mineral assemblages; North Pacific; Northeast Pacific; oceanic crust; olivine gabbro; Pacific Ocean; paleomagnetism; petrology; physical properties; plutonic rocks; thin sections; troctolite; veins; well logs DO - http://dx.doi.org/10.2204/iodp.proc.345.113.2014 ER - TY - JOUR T1 - Hole U1415J AN - 1510397419; 2014-022185 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 159 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - oceanic crust KW - alteration KW - volcanic rocks KW - Northeast Pacific KW - igneous rocks KW - olivine gabbro KW - gabbronorite KW - cores KW - magnetic properties KW - plutonic rocks KW - IODP Site U1415 KW - basalts KW - drilling KW - East Pacific KW - well logs KW - paleomagnetism KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - veins KW - metamorphism KW - boreholes KW - troctolite KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - magnetic susceptibility KW - Hess Deep KW - Expedition 345 KW - gabbros KW - diabase KW - crust KW - anisotropy KW - 18:Solid-earth geophysics KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397419?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Hole+U1415J&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.110.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 61 N1 - PubXState - DC N1 - Document feature - illus. incl. 13 tables N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - alteration; anisotropy; basalts; boreholes; cores; crust; diabase; drilling; East Pacific; Equatorial Pacific; Expedition 345; gabbronorite; gabbros; Hess Deep; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1415; magnetic properties; magnetic susceptibility; marine drilling; metamorphism; North Pacific; Northeast Pacific; oceanic crust; olivine gabbro; Pacific Ocean; paleomagnetism; plutonic rocks; troctolite; veins; volcanic rocks; well logs DO - http://dx.doi.org/10.2204/iodp.proc.345.110.2014 ER - TY - JOUR T1 - Holes U1415B and U1415C AN - 1510397372; 2014-022180 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 3 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - East Pacific KW - Northeast Pacific KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - cores KW - marine sediments KW - boreholes KW - IODP Site U1415 KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - sediments KW - Hess Deep KW - Expedition 345 KW - drilling KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397372?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Holes+U1415B+and+U1415C&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.105.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 2 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - boreholes; cores; drilling; East Pacific; Equatorial Pacific; Expedition 345; Hess Deep; Integrated Ocean Drilling Program; IODP Site U1415; marine drilling; marine sediments; North Pacific; Northeast Pacific; Pacific Ocean; sediments DO - http://dx.doi.org/10.2204/iodp.proc.345.105.2014 ER - TY - JOUR T1 - Expediton 345 summary AN - 1510397338; 2014-022176 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 49 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - oceanic crust KW - volcanic rocks KW - Northeast Pacific KW - igneous rocks KW - olivine gabbro KW - metasomatism KW - cores KW - fractures KW - plutonic rocks KW - IODP Site U1415 KW - basalts KW - sea-floor spreading KW - hydrothermal alteration KW - drilling KW - ocean floors KW - geochemistry KW - spreading centers KW - East Pacific KW - magmatism KW - fluid flow KW - Integrated Ocean Drilling Program KW - brittle deformation KW - Equatorial Pacific KW - deformation KW - veins KW - models KW - plate tectonics KW - boreholes KW - troctolite KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - Hess Deep KW - Expedition 345 KW - gabbros KW - East Pacific Rise KW - diabase KW - crust KW - mid-ocean ridges KW - 18:Solid-earth geophysics KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397338?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Expediton+345+summary&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.101.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 118 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, geol. sketch map N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - basalts; boreholes; brittle deformation; cores; crust; deformation; diabase; drilling; East Pacific; East Pacific Rise; Equatorial Pacific; Expedition 345; fluid flow; fractures; gabbros; geochemistry; Hess Deep; hydrothermal alteration; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1415; magmatism; marine drilling; metasomatism; mid-ocean ridges; models; North Pacific; Northeast Pacific; ocean floors; oceanic crust; olivine gabbro; Pacific Ocean; plate tectonics; plutonic rocks; sea-floor spreading; spreading centers; troctolite; veins; volcanic rocks DO - http://dx.doi.org/10.2204/iodp.proc.345.101.2014 ER - TY - JOUR T1 - Hole U14150 AN - 1510397299; 2014-022187 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 3 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - oceanic crust KW - East Pacific KW - Northeast Pacific KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - cores KW - boreholes KW - IODP Site U1415 KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - Hess Deep KW - Expedition 345 KW - drilling KW - crust KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397299?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Hole+U14150&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.112.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 2 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - boreholes; cores; crust; drilling; East Pacific; Equatorial Pacific; Expedition 345; Hess Deep; Integrated Ocean Drilling Program; IODP Site U1415; marine drilling; North Pacific; Northeast Pacific; oceanic crust; Pacific Ocean DO - http://dx.doi.org/10.2204/iodp.proc.345.112.2014 ER - TY - JOUR T1 - Hole U1415A AN - 1510397250; 2014-022179 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 4 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - East Pacific KW - Northeast Pacific KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - cores KW - marine sediments KW - boreholes KW - IODP Site U1415 KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - sediments KW - Hess Deep KW - Expedition 345 KW - drilling KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397250?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Hole+U1415A&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.104.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 2 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - boreholes; cores; drilling; East Pacific; Equatorial Pacific; Expedition 345; Hess Deep; Integrated Ocean Drilling Program; IODP Site U1415; marine drilling; marine sediments; North Pacific; Northeast Pacific; Pacific Ocean; sediments DO - http://dx.doi.org/10.2204/iodp.proc.345.104.2014 ER - TY - JOUR T1 - Bench site survey AN - 1510397238; 2014-022178 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 20 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - East Pacific KW - acoustical profiles KW - Northeast Pacific KW - geophysical surveys KW - site exploration KW - geophysical methods KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - cores KW - acoustical methods KW - marine sediments KW - boreholes KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - sediments KW - Hess Deep KW - Expedition 345 KW - surveys KW - geophysical profiles KW - drilling KW - ocean floors KW - 20:Applied geophysics KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397238?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Bench+site+survey&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.103.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 6 N1 - PubXState - DC N1 - Document feature - illus. incl. sects., 1 table, sketch map N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - acoustical methods; acoustical profiles; boreholes; cores; drilling; East Pacific; Equatorial Pacific; Expedition 345; geophysical methods; geophysical profiles; geophysical surveys; Hess Deep; Integrated Ocean Drilling Program; marine drilling; marine sediments; North Pacific; Northeast Pacific; ocean floors; Pacific Ocean; sediments; site exploration; surveys DO - http://dx.doi.org/10.2204/iodp.proc.345.103.2014 ER - TY - JOUR T1 - Methods AN - 1510397230; 2014-022177 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 63 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - inductively coupled plasma methods KW - volcanic rocks KW - Northeast Pacific KW - igneous rocks KW - well-logging KW - microstructure KW - thin sections KW - metasomatism KW - cores KW - X-ray diffraction analysis KW - plutonic rocks KW - mineral composition KW - IODP Site U1415 KW - X-ray analysis KW - hydrothermal alteration KW - drilling KW - geochemistry KW - East Pacific KW - petrology KW - X-ray fluorescence KW - textures KW - structural analysis KW - paleomagnetism KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - veins KW - metamorphism KW - physical properties KW - boreholes KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - Hess Deep KW - Expedition 345 KW - spectroscopy 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/1510397230?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Methods&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.102.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 49 N1 - PubXState - DC N1 - Document feature - illus. incl. 7 tables N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - boreholes; cores; drilling; East Pacific; Equatorial Pacific; Expedition 345; geochemistry; Hess Deep; hydrothermal alteration; igneous rocks; inductively coupled plasma methods; Integrated Ocean Drilling Program; IODP Site U1415; marine drilling; metamorphism; metasomatism; microstructure; mineral composition; North Pacific; Northeast Pacific; Pacific Ocean; paleomagnetism; petrology; physical properties; plutonic rocks; spectroscopy; structural analysis; textures; thin sections; veins; volcanic rocks; well-logging; X-ray analysis; X-ray diffraction analysis; X-ray fluorescence DO - http://dx.doi.org/10.2204/iodp.proc.345.102.2014 ER - TY - JOUR T1 - Holes U1415D and U1415E AN - 1510397228; 2014-022181 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 16 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - oceanic crust KW - Northeast Pacific KW - igneous rocks KW - olivine gabbro KW - gabbronorite KW - cores KW - plutonic rocks KW - IODP Site U1415 KW - drilling KW - geochemistry KW - East Pacific KW - petrology KW - structural analysis KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - veins KW - metamorphism KW - physical properties KW - boreholes KW - troctolite KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - Hess Deep KW - Expedition 345 KW - gabbros KW - crust KW - 18:Solid-earth geophysics KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397228?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Holes+U1415D+and+U1415E&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.106.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 8 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - boreholes; cores; crust; drilling; East Pacific; Equatorial Pacific; Expedition 345; gabbronorite; gabbros; geochemistry; Hess Deep; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1415; marine drilling; metamorphism; North Pacific; Northeast Pacific; oceanic crust; olivine gabbro; Pacific Ocean; petrology; physical properties; plutonic rocks; structural analysis; troctolite; veins DO - http://dx.doi.org/10.2204/iodp.proc.345.106.2014 ER - TY - JOUR T1 - Proceedings of the Integrated Ocean Drilling Program; Hess Deep plutonic crust; exploring the plutonic crust at a fast-spreading ridge; new drilling at Hess Deep; Expedition 345 of the riserless drilling platform; Puntarenas, Costa Rica, to Balboa, Panama; Site U1415, 11 December 2012-12 February 2013 AN - 1510397224; 2014-022175 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 EP - variously paginated PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - oceanic crust KW - Northeast Pacific KW - igneous rocks KW - olivine gabbro KW - cores KW - plutonic rocks KW - IODP Site U1415 KW - sea-floor spreading KW - drilling KW - ocean floors KW - spreading centers KW - East Pacific KW - magmatism KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - plate tectonics KW - boreholes KW - troctolite KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - Hess Deep KW - Expedition 345 KW - gabbros KW - East Pacific Rise KW - crust KW - mid-ocean ridges KW - 18:Solid-earth geophysics KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397224?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&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program%3B+Hess+Deep+plutonic+crust%3B+exploring+the+plutonic+crust+at+a+fast-spreading+ridge%3B+new+drilling+at+Hess+Deep%3B+Expedition+345+of+the+riserless+drilling+platform%3B+Puntarenas%2C+Costa+Rica%2C+to+Balboa%2C+Panama%3B+Site+U1415%2C+11+December+2012-12+February+2013&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program%3B+Hess+Deep+plutonic+crust%3B+exploring+the+plutonic+crust+at+a+fast-spreading+ridge%3B+new+drilling+at+Hess+Deep%3B+Expedition+345+of+the+riserless+drilling+platform%3B+Puntarenas%2C+Costa+Rica%2C+to+Balboa%2C+Panama%3B+Site+U1415%2C+11+December+2012-12+February+2013&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Document feature - illus. incl. sects., tables, sketch maps N1 - SuppNotes - Individual papers are cited separately N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - boreholes; cores; crust; drilling; East Pacific; East Pacific Rise; Equatorial Pacific; Expedition 345; gabbros; Hess Deep; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1415; magmatism; marine drilling; mid-ocean ridges; North Pacific; Northeast Pacific; ocean floors; oceanic crust; olivine gabbro; Pacific Ocean; plate tectonics; plutonic rocks; sea-floor spreading; spreading centers; troctolite DO - http://dx.doi.org/10.2204/iodp.proc.345.2014 ER - TY - JOUR T1 - Holes U1415K, U1415L, U1415M, and U1415N AN - 1510397223; 2014-022186 JF - Proceedings of the Integrated Ocean Drilling Program (Online) AU - Gillis, Kathryn M AU - Snow, Jonathan E AU - Klaus, Adam AU - Guerin, Gilles AU - Abe, Natsue AU - Akizawa, Norikatsu AU - Ceuleneer, Georges AU - Cheadle, Michael J AU - de Brito Adriao, Alden AU - Faak, Kathrin AU - Falloon, Trevor J AU - Friedman, Sarah A AU - Godard, Marguerite M AU - Harigane, Yumiko AU - Horst, Andrew J AU - Hoshide, Takashi AU - Ildefonse, Benoit AU - Jean, Marlon M AU - John, Barbara E AU - Koepke, Juergen H AU - Machi, Sumiaki AU - Maeda, Jinichiro AU - Marks, Naomi E AU - McCaig, Andrew M AU - Meyer, Romain AU - Morris, Antony AU - Nozaka, Toshio AU - Python, Marie AU - Saha, Abhishek AU - Wintsch, Robert P Y1 - 2014 PY - 2014 DA - 2014 SP - 24 PB - Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC VL - 345 SN - 1930-1014, 1930-1014 KW - oceanic crust KW - alteration KW - Northeast Pacific KW - igneous rocks KW - olivine gabbro KW - cores KW - plutonic rocks KW - IODP Site U1415 KW - diorites KW - drilling KW - geochemistry KW - East Pacific KW - petrology KW - structural analysis KW - Integrated Ocean Drilling Program KW - Equatorial Pacific KW - metamorphism KW - physical properties KW - boreholes KW - North Pacific KW - Pacific Ocean KW - marine drilling KW - Hess Deep KW - Expedition 345 KW - gabbros KW - diabase KW - crust KW - 18:Solid-earth geophysics KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397223?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.atitle=Holes+U1415K%2C+U1415L%2C+U1415M%2C+and+U1415N&rft.au=Gillis%2C+Kathryn+M%3BSnow%2C+Jonathan+E%3BKlaus%2C+Adam%3BGuerin%2C+Gilles%3BAbe%2C+Natsue%3BAkizawa%2C+Norikatsu%3BCeuleneer%2C+Georges%3BCheadle%2C+Michael+J%3Bde+Brito+Adriao%2C+Alden%3BFaak%2C+Kathrin%3BFalloon%2C+Trevor+J%3BFriedman%2C+Sarah+A%3BGodard%2C+Marguerite+M%3BHarigane%2C+Yumiko%3BHorst%2C+Andrew+J%3BHoshide%2C+Takashi%3BIldefonse%2C+Benoit%3BJean%2C+Marlon+M%3BJohn%2C+Barbara+E%3BKoepke%2C+Juergen+H%3BMachi%2C+Sumiaki%3BMaeda%2C+Jinichiro%3BMarks%2C+Naomi+E%3BMcCaig%2C+Andrew+M%3BMeyer%2C+Romain%3BMorris%2C+Antony%3BNozaka%2C+Toshio%3BPython%2C+Marie%3BSaha%2C+Abhishek%3BWintsch%2C+Robert+P&rft.aulast=Gillis&rft.aufirst=Kathryn&rft.date=2014-01-01&rft.volume=345&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+Integrated+Ocean+Drilling+Program+%28Online%29&rft.issn=19301014&rft_id=info:doi/10.2204%2Fiodp.proc.345.111.2014 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 6 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-03-27 N1 - CODEN - IDSDA6 N1 - SubjectsTermNotLitGenreText - alteration; boreholes; cores; crust; diabase; diorites; drilling; East Pacific; Equatorial Pacific; Expedition 345; gabbros; geochemistry; Hess Deep; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1415; marine drilling; metamorphism; North Pacific; Northeast Pacific; oceanic crust; olivine gabbro; Pacific Ocean; petrology; physical properties; plutonic rocks; structural analysis DO - http://dx.doi.org/10.2204/iodp.proc.345.111.2014 ER - TY - JOUR T1 - Fluctuation in leaf wax D/H ratio from a Southern California lake records significant variability in isotopes in precipitation during the late Holocene AN - 1510397178; 2014-021826 AB - The hydrogen isotopic composition of plant molecular markers in modern vegetation and marine sediments in Southern California have been intensively studied. Here we report a late Holocene reconstruction from Zaca Lake in coastal Southern California, together with modern hydrological and vegetation studies in the catchment. The small catchment and decadal sampling resolution throughout the 9m, 3000yr sedimentary record provided a high resolution terrigenous counterpart of nearby marine records from the Santa Barbara Basin. Today, delta D values of precipitation average -51.5 ppm+ or -18 (1sigma , n=7). Modern plant leaf wax delta D values for the C (sub 28) n-alkanoic acid averaged -141 ppm+ or -11 (1sigma , n=10) for Quercus agrifolia, with a calculated fractionation relative to precipitation (epsilon (sub wax/precip) ) of -94 ppm+ or -22 (1sigma , n=10); in contrast, there was negligible production of the C (sub 28) acid by co-dominant Pinus coulteri. Downcore, the C (sub 28) acid delta D values ranged between -101 ppm and -177 ppm (mean -150 ppm+ or -8, 1sigma , n=490). Abundance distributions suggested that the sedimentary C (sub 28) acid was dominated by Quercus, implying that paleoprecipitation varied between extremes of -8 ppm and -92 ppm (mean -63 ppm+ or -14, compound 1sigma , n=490). The 3000yr leaf wax D/H record from Zaca Lake revealed substantial temporal variability, greater than observed in a speleothem reconstruction of similar resolution. We suggest that the plant-based proxy may magnify the variability by sampling spring precipitation preferentially. Centennial-duration positive isotopic excursions were associated with more sub-tropical moisture sources and drier conditions including during the Medieval Climatic Anomaly, and negative excursions were associated with N Pacific sources and wetter conditions including during the Little Ice Age. Abstract Copyright (2014) Elsevier, B.V. JF - Organic Geochemistry AU - Feakins, Sarah J AU - Kirby, Matthew E AU - Cheetham, Michael I AU - Ibarra, Yadira AU - Zimmerman, Susan R H Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 48 EP - 59 PB - Elsevier VL - 66 SN - 0146-6380, 0146-6380 KW - United States KW - Spermatophyta KW - isotopes KW - moisture KW - lakes KW - aliphatic hydrocarbons KW - Coniferales KW - vegetation KW - leaves KW - Santa Barbara Basin KW - paleoclimatology KW - Holocene KW - Dicotyledoneae KW - stable isotopes KW - Pinus KW - Cenozoic KW - California KW - marine sediments KW - n-alkanes KW - waxes KW - sediments KW - Quercus KW - deuterium KW - Plantae KW - Quaternary KW - isotope ratios KW - Gymnospermae KW - Zaca Lake KW - alkanes KW - biomarkers KW - organic compounds KW - Southern California KW - North Pacific KW - Neoglacial KW - Middle Ages KW - precipitation KW - hydrogen KW - Pacific Ocean KW - Pinaceae KW - hydrocarbons KW - coastal environment KW - reconstruction KW - upper Holocene KW - Angiospermae KW - 24:Quaternary geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397178?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Organic+Geochemistry&rft.atitle=Fluctuation+in+leaf+wax+D%2FH+ratio+from+a+Southern+California+lake+records+significant+variability+in+isotopes+in+precipitation+during+the+late+Holocene&rft.au=Feakins%2C+Sarah+J%3BKirby%2C+Matthew+E%3BCheetham%2C+Michael+I%3BIbarra%2C+Yadira%3BZimmerman%2C+Susan+R+H&rft.aulast=Feakins&rft.aufirst=Sarah&rft.date=2014-01-01&rft.volume=66&rft.issue=&rft.spage=48&rft.isbn=&rft.btitle=&rft.title=Organic+Geochemistry&rft.issn=01466380&rft_id=info:doi/10.1016%2Fj.orggeochem.2013.10.015 L2 - http://www.sciencedirect.com/science/journal/01466380 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 - 52 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-03-27 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; Angiospermae; biomarkers; California; Cenozoic; coastal environment; Coniferales; deuterium; Dicotyledoneae; Gymnospermae; Holocene; hydrocarbons; hydrogen; isotope ratios; isotopes; lakes; leaves; marine sediments; Middle Ages; moisture; n-alkanes; Neoglacial; North Pacific; organic compounds; Pacific Ocean; paleoclimatology; Pinaceae; Pinus; Plantae; precipitation; Quaternary; Quercus; reconstruction; Santa Barbara Basin; sediments; Southern California; Spermatophyta; stable isotopes; United States; upper Holocene; vegetation; waxes; Zaca Lake DO - http://dx.doi.org/10.1016/j.orggeochem.2013.10.015 ER - TY - JOUR T1 - Lithium and oxygen vacancies and their role in Li sub(2)O sub(2) charge transport in Li-O sub(2) batteries AN - 1500787778; 19052762 AB - It is now well accepted that charge transport through Li sub(2)O sub(2) is a serious limitation in Li-O sub(2) batteries. We report formation energies for the different charge states of Li, O and O sub(2) vacancies in Li sub(2)O sub(2) that could have important implications for charge transport through Li sub(2)O sub(2). Charge transition levels are given as a function of the location of the Fermi level in Li sub(2)O sub(2) relative to the valence band maximum (VBM). We argue that in Li-O sub(2) discharge/charge electrochemistry, the Fermi level is pinned by LiO sub(2) interface states at similar to 0.35 eV above the VBM and this causes the vacancies to be in positively charged states (weakly violating local charge neutrality). We show by non-equilibrium Greens function calculations of charge transport through a Au|Li sub(2)O sub(2) + V sub(Li) super(q) JF - Energy & Environmental Science AU - Varley, J B AU - Viswanathan, V AU - Noerskov, J K AU - Luntz, A C AD - Lawrence Livermore National Laboratory; Livermore; CA 94550; USA; , acluntz@slac.stanford.edu Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 720 EP - 727 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 7 IS - 2 SN - 1754-5692, 1754-5692 KW - Environment Abstracts KW - Oxygen KW - Batteries KW - Energy KW - Electrochemistry KW - Lithium KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1500787778?accountid=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=Lithium+and+oxygen+vacancies+and+their+role+in+Li+sub%282%29O+sub%282%29+charge+transport+in+Li-O+sub%282%29+batteries&rft.au=Varley%2C+J+B%3BViswanathan%2C+V%3BNoerskov%2C+J+K%3BLuntz%2C+A+C&rft.aulast=Varley&rft.aufirst=J&rft.date=2014-01-01&rft.volume=7&rft.issue=2&rft.spage=720&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environmental+Science&rft.issn=17545692&rft_id=info:doi/10.1039%2Fc3ee42446d LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 35 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Oxygen; Batteries; Energy; Electrochemistry; Lithium DO - http://dx.doi.org/10.1039/c3ee42446d ER - TY - JOUR T1 - A Lithospheric Attenuation Model of North America AN - 1802202442; 20336417 AB - Recent moderate-sized, but strongly felt, earthquakes in eastern and central North America have highlighted the important role of the Earth's attenuation structure in estimating and predicting local and regional ground motions. Over the past several years, we have been developing methods to use the amplitudes of regional phases Pn, [Formula], Sn, and [Formula] to invert for the crust and upper mantle attenuation structure in Eurasia, and have recently started transporting the methodology to North America. We now have path coverage for most of North America, including Canada, the United States, Mexico, and portions of the Caribbean, with the best coverage in the United States. After describing the development of the model, we discuss the results in the context of the tectonics of the region, most notably the large differences between western North America and areas east of the Rockies. We will then demonstrate the use of the model in a number of applications including estimating reliable moment magnitudes for the Wells, Nevada, earthquake sequence, the use of the models in strong ground motion prediction for the Mineral, Virginia, mainshock, and in both discriminating and estimating explosion characteristics (depth, yield) of events at the Nevada Test Site. JF - Bulletin of the Seismological Society of America. Berkeley CA AU - Pasyanos, Michael E AD - Lawrence Livermore National Laboratory, L-046, P.O. Box 808, Livermore, California 94551, pasyanos1@llnl.gov Y1 - 2013/12/15/ PY - 2013 DA - 2013 Dec 15 SP - 3321 EP - 3333 PB - Seismological Society of America VL - 103 IS - 6 SN - 0037-1106, 0037-1106 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Earthquakes KW - Upper mantle KW - Ground motion KW - Attenuation KW - ANW, Canada KW - USA, Nevada KW - Explosions KW - ANW, USA, Virginia KW - Methodology KW - Yield KW - ASW, Caribbean Sea KW - ASW, Mexico KW - Eurasia KW - Minerals KW - Tectonics KW - Modelling KW - Q2 09270:Seismology KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1802202442?accountid=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=A+Lithospheric+Attenuation+Model+of+North+America&rft.au=Pasyanos%2C+Michael+E&rft.aulast=Pasyanos&rft.aufirst=Michael&rft.date=2013-12-15&rft.volume=103&rft.issue=6&rft.spage=3321&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America.+Berkeley+CA&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120130122 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Upper mantle; Earthquakes; Ground motion; Attenuation; Explosions; Methodology; Modelling; Yield; Minerals; Tectonics; ASW, Caribbean Sea; ASW, Mexico; Eurasia; ANW, Canada; USA, Nevada; ANW, USA, Virginia DO - http://dx.doi.org/10.1785/0120130122 ER - TY - JOUR T1 - Model reduction of a coupled numerical model using proper orthogonal decomposition AN - 1560082378; 2014-067721 AB - Numerical models for variable-density flow and solute transport (VDFST) are widely used to simulate seawater intrusion and related problems. The mathematical model for VDFST is a coupled nonlinear dynamical system, so the numerical discretizations in time and space are usually required to be as fine as possible. As a result, fine-scale transient models require large computational time, which is a disadvantage for state estimation, forward prediction or model inversion. The purpose of this research is to develop mathematical and numerical methods to simulate VDFST via a model order reduction technique called Proper Orthogonal Decomposition (POD) designed for nonlinear dynamical systems. POD was applied to extract leading "model features" (basis functions) through singular value decomposition (SVD) from observational data or simulations (snapshots) of high-dimensional systems. These basis functions were then used in the Galerkin projection procedure that yielded low-dimensional (reduced-order) models. The original full numerical models were also discretized by the Galerkin Finite-Element Method (GFEM). The implementation of the POD reduced-order method was straightforward when applied to the full order model to the complex model. The developed GFEM-POD model was applied to solve two classic VDFST cases, the Henry problem and the Elder problem, in order to investigate the accuracy and efficiency of the POD model reduction method. Once the snapshots from full model results are obtained, the reduced-order model can reproduce the full model results with acceptable accuracy but with less computational cost in comparison with the full model, which is useful for model calibration and data assimilation problems. We found that the accuracy and efficiency of the POD reduced-order model is mainly determined by the optimal selection of snapshots and POD bases. Validation and verification experiments confirmed our POD model reduction procedure. Abstract Copyright (2013) Elsevier, B.V. JF - Journal of Hydrology AU - Li, Xinya AU - Chen, Xiao AU - Hu, Bill X AU - Navon, I Michael Y1 - 2013/12/12/ PY - 2013 DA - 2013 Dec 12 SP - 227 EP - 240 PB - Elsevier, Amsterdam VL - 507 SN - 0022-1694, 0022-1694 KW - solute transport KW - Galerkin method KW - experimental studies KW - salt-water intrusion KW - numerical models KW - density KW - variable density flow and solute transport KW - simulation KW - ground water KW - finite element analysis KW - transport KW - mathematical methods KW - proper orthogonal decomposition KW - accuracy KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560082378?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Model+reduction+of+a+coupled+numerical+model+using+proper+orthogonal+decomposition&rft.au=Li%2C+Xinya%3BChen%2C+Xiao%3BHu%2C+Bill+X%3BNavon%2C+I+Michael&rft.aulast=Li&rft.aufirst=Xinya&rft.date=2013-12-12&rft.volume=507&rft.issue=&rft.spage=227&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2013.09.011 L2 - http://www.sciencedirect.com/science/journal/00221694 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 - 55 N1 - Document feature - illus. N1 - Last updated - 2014-11-13 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - accuracy; density; experimental studies; finite element analysis; Galerkin method; ground water; mathematical methods; numerical models; proper orthogonal decomposition; salt-water intrusion; simulation; solute transport; transport; variable density flow and solute transport DO - http://dx.doi.org/10.1016/j.jhydrol.2013.09.011 ER - TY - JOUR T1 - Biological and physical influences on soil super(14)CO sub(2) seasonal dynamics in a temperate hardwood forest AN - 1492661232; 18989576 AB - While radiocarbon ( super(14)C) abundances in standing stocks of soil carbon have been used to evaluate rates of soil carbon turnover on timescales of several years to centuries, soil-respired super(14)CO sub(2) measurements are an important tool for identifying more immediate responses to disturbance and climate change. Soil Delta super(14)CO sub(2) data, however, are often temporally sparse and could be interpreted better with more context for typical seasonal ranges and trends. We report on a semi-high-frequency sampling campaign to distinguish physical and biological drivers of soil Delta super(14)CO sub(2) at a temperate forest site in northern Wisconsin, USA. We sampled super(14)CO sub(2) profiles every three weeks during snow-free months through 2012 in three intact plots and one trenched plot that excluded roots. Respired Delta super(14)CO sub(2) declined through the summer in intact plots, shifting from an older C composition that contained more bomb super(14)C to a younger composition more closely resembling present super(14)C levels in the atmosphere. In the trenched plot, respired Delta super(14)CO sub(2) was variable but remained comparatively higher than in intact plots, reflecting older bomb-enriched super(14)C sources. Although respired Delta super(14)CO sub(2) from intact plots correlated with soil moisture, related analyses did not support a clear cause-and-effect relationship with moisture. The initial decrease in Delta super(14)CO sub(2) from spring to midsummer could be explained by increases in super(14)C-deplete root respiration; however, Delta super(14)CO sub(2) continued to decline in late summer after root activity decreased. We also investigated whether soil moisture impacted vertical partitioning of CO sub(2) production, but found this had little effect on respired Delta super(14)CO sub(2) because CO sub(2) contained modern bomb C at depth, even in the trenched plot. This surprising result contrasted with decades to centuries-old pre-bomb CO sub(2) produced in lab incubations of the same soils. Our results suggest that root-derived C and other recent C sources had dominant impacts on respired Delta super(14)CO sub(2) in situ, even at depth. We propose that Delta super(14)CO sub(2) may have declined through late summer in intact plots because of continued microbial turnover of root-derived C, following declines in root respiration. Our results agree with other studies showing declines in the super(14)C content of soil respiration over the growing season, and suggest inputs of new photosynthates through roots are an important driver. JF - Biogeosciences AU - Phillips, CL AU - McFarlane, K J AU - Risk, D AU - Desai, A R AD - Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA, USA Y1 - 2013/12/09/ PY - 2013 DA - 2013 Dec 09 SP - 7999 EP - 8012 PB - European Geosciences Union, c/o E.O.S.T. Strasbourg Cedex 67084 France VL - 10 IS - 12 SN - 1726-4170, 1726-4170 KW - Ecology Abstracts; Sustainability Science Abstracts KW - Respiration KW - Climate change KW - Climatic changes KW - Roots KW - Forests KW - Summer KW - USA, Wisconsin KW - Hardwoods KW - Atmosphere KW - Soil KW - Sulfur dioxide KW - Carbon KW - Sampling KW - Seasonal variations KW - Data processing KW - Photosynthates KW - Atmospheric chemistry KW - Disturbance KW - Carbon dioxide KW - Soil moisture 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/1492661232?accountid=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=Biogeosciences&rft.atitle=Biological+and+physical+influences+on+soil+super%2814%29CO+sub%282%29+seasonal+dynamics+in+a+temperate+hardwood+forest&rft.au=Phillips%2C+CL%3BMcFarlane%2C+K+J%3BRisk%2C+D%3BDesai%2C+A+R&rft.aulast=Phillips&rft.aufirst=CL&rft.date=2013-12-09&rft.volume=10&rft.issue=12&rft.spage=7999&rft.isbn=&rft.btitle=&rft.title=Biogeosciences&rft.issn=17264170&rft_id=info:doi/10.5194%2Fbg-10-7999-2013 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Data processing; Carbon; Respiration; Climatic changes; Forests; Roots; Sampling; Photosynthates; Soil moisture; Carbon dioxide; Atmosphere; Hardwoods; Climate change; Summer; Soil; Sulfur dioxide; Atmospheric chemistry; Disturbance; Seasonal variations; USA, Wisconsin DO - http://dx.doi.org/10.5194/bg-10-7999-2013 ER - TY - JOUR T1 - Application of a regional seismic travel time model to event detection and location at the International Data Centre AN - 1707526295; 2015-080688 AB - A key element of the verification regime established to monitor the Comprehensive Nuclear-Test-Ban Treaty is a system operated by the International Data Centre (IDC) to detect and locate global seismicity. The process of event detection and location rely on accurate travel-time models to both associate signals from a network of sensors and locate an event. Furthermore, the Treaty provides for on-site inspection, which presumes an accurate event location. To confidently monitor the treaty at low magnitudes, the use of regional seismic data (the Pn, Pg, Sn, Lg arrival times) is essential; however, the effective use of such data requires an earth model that includes the effects of lateral variations. Myers et al., 2010, present a framework (the Regional Seismic Travel Time, or RSTT model) to efficiently model the regional seismic travel times. The RSTT model is based on approximations that are necessary for an efficient operational implementation. It is a global framework, which simplifies the management of a laterally varying model for a global network. The approximations in RSTT also lead to a tomographic formulation that allows for the model to be updated as new data become available. The IDC has integrated the RSTT model into its operational algorithms. There are, however, significant challenges involving efficiency and accuracy that must be addressed before applying the model routinely. To ensure that including the RSTT model will be feasible, RSTT is used to calculate source-specific-station corrections, which are maps of the deviation from a global 1D model for each phase and station. This is the mechanism the IDC uses to efficiently correct for lateral variations and, therefore, the computational impact of using RSTT is known. The accuracy of the RSTT model is validated by comparing with ground-truth event locations. It is also important to understand where the approximation breaks down, in particular at larger distances or along anomalous paths, and reflect the accuracy in the regionally dependent model errors. Large-scale tests of the association algorithm using RSTT validate the effectiveness of applying the model. JF - American Geophysical Union Fall Meeting AU - Given, J W AU - Fan, G AU - Bobrov, D AU - Myers, S C AU - Begnaud, M L AU - Ballard, S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S24B EP - 06 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707526295?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Application+of+a+regional+seismic+travel+time+model+to+event+detection+and+location+at+the+International+Data+Centre&rft.au=Given%2C+J+W%3BFan%2C+G%3BBobrov%2C+D%3BMyers%2C+S+C%3BBegnaud%2C+M+L%3BBallard%2C+S%3BAnonymous&rft.aulast=Given&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Predicting travel times for a broad suite of seismic phases with full 3-D ray tracing AN - 1707526151; 2015-080600 AB - We recently constructed a global-scale P-wave model (LLNL-G3D version 3, Simmons et al. 2012, JGR) designed to predict travel times for the first arriving P-wave energy at regional and teleseismic distances (Pn and P phases). The model is complex with undulating structures explicitly represented including 7 crustal units, the Moho, and the upper mantle phase transitions. The explicit aspherical representation of the Earth is required to perform true 3-D ray tracing, which was employed to construct the model. Our tests have demonstrated a significant improvement in event location accuracy using P and Pn travel times predicted from the LLNL-G3D model. There is a need to predict additional seismic phases using a single model so that the travel times are self-consistent. Therefore, we are developing full 3-D ray tracing procedures for additional seismic phases (pP, PcP, PKP branches, PP, S phases). We will demonstrate the ability (or inability) of the current model to predict some of these travel times and explore the usefulness of these arrivals in constructing the next version of the LLNL-G3D model. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-641528. JF - American Geophysical Union Fall Meeting AU - Simmons, N A AU - Myers, S C AU - Johannesson, G AU - Matzel, E AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2393 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707526151?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Predicting+travel+times+for+a+broad+suite+of+seismic+phases+with+full+3-D+ray+tracing&rft.au=Simmons%2C+N+A%3BMyers%2C+S+C%3BJohannesson%2C+G%3BMatzel%2C+E%3BAnonymous&rft.aulast=Simmons&rft.aufirst=N&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - International collaboration to improve the Regional Seismic Travel Time (RSTT) model AN - 1707526105; 2015-080598 AB - The Regional Seismic Travel Time (RSTT) method (Myers et al., 2010) was developed to facilitate the use of regional data in routine seismic monitoring. RSTT improves prediction accuracy for Pn, Pg, Sn, and Lg travel times using a 3-dimensional model of the Earth's crust and laterally varying seismic wave speed in the upper mantle. Upper mantle velocity is parameterization as a linear function of depth, so that travel times can be computed accurately and in real time. Real-time computation on readily available computers is key to the usefulness of the method by seismic centers that utilize today's flexible networks. In areas where the RSTT model is well constrained by tomography (Eurasia and North America) we have demonstrated improvement in event location accuracy. Extension of RSTT tomographic datasets to new regions is being pursued through international outreach efforts that are coordinated between the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) and the International Seismological Centre (ISC). Our efforts to date have expanded the collection of regionally recorded events with well-constrained hypocenters in South America, Australia, and Africa. We have also incorporated recently published models of crust and upper mantle structure into the RSTT model. Tests in regions sampled by newly compiled data suggest that the RSTT model improves travel time predictions with respect to the ak135 model (Kennett et al., 1995), which is the global standard for travel time prediction. We are continuing to collect and freely distribute ground-truth data in new regions as well as updates to the RSTT model. This work performed in part under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Myers, S C AU - Begnaud, M L AU - Ballard, S AU - Bondar, I AU - Storchak, D A AU - Given, Jeffrey W AU - Guendel, F AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2391 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707526105?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=International+collaboration+to+improve+the+Regional+Seismic+Travel+Time+%28RSTT%29+model&rft.au=Myers%2C+S+C%3BBegnaud%2C+M+L%3BBallard%2C+S%3BBondar%2C+I%3BStorchak%2C+D+A%3BGiven%2C+Jeffrey+W%3BGuendel%2C+F%3BAnonymous&rft.aulast=Myers&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Exploring large-scale cross-correlation for teleseismic and regional seismic event characterization AN - 1707526094; 2015-080611 AB - The decrease in cost of digital storage space and computation power invites new methods of seismic data processing. At Lawrence Livermore National Laboratory (LLNL), we operate a research database of seismic events and waveforms for nuclear explosion monitoring and other applications. The LLNL database contains several million events associated with more than 330 million waveforms at thousands of stations. We are using this database to explore the power of seismic waveform correlation to quantify signal similarities, to discover new events not in catalogs, and to more accurately locate events and identify source types. The results presented here are preliminary, and apply mostly to a subset of seismicity in Eurasia and North America. Much more remains to be done to understand and make use of these results. We computed the waveform correlation for event pairs in the LLNL database in 15 frequency bands and for 8 phase windows. The correlation coefficient exceeds 0.6 for over 370 million waveform pairs. Overall, about 16% of the events in our waveform database correlate with one or more events on at least one channel. However, at very short distances, this number rises to as high as 55%. At distances > 20 degrees the percent of correlated events ranges from nearly equal 1% to 10%. The majority of correlated waveforms are found at relatively small (< 10 degrees) station-event separations in short-period bands. Most correlations at teleseismic distances are in long-period bands. Also, for most events, correlated traces are found at only a few stations. The mean magnitude of correlated events is about 1 unit lower than the mean of the events in our waveform database and the standard deviation of the magnitude difference of correlated events is 0.6. Apparently, large-scale correlation processing is most likely to work well for small events of similar magnitude. We have clustered the correlation results in both short- and long-period bands and have identified 439 long-period and 1333 short-period clusters with more than 10 elements each. We are now analyzing these results to look for previously unidentified mining seismicity. We are also looking for regional variations and event-type variations in the relation between event-station separation and correlation value. JF - American Geophysical Union Fall Meeting AU - Hauk, T F AU - Dodge, D A AU - Addair, T AU - Walter, W R AU - Myers, S C AU - Ford, S R AU - Harris, D B AU - Ruppert, S D AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2404 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707526094?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Exploring+large-scale+cross-correlation+for+teleseismic+and+regional+seismic+event+characterization&rft.au=Hauk%2C+T+F%3BDodge%2C+D+A%3BAddair%2C+T%3BWalter%2C+W+R%3BMyers%2C+S+C%3BFord%2C+S+R%3BHarris%2C+D+B%3BRuppert%2C+S+D%3BAnonymous&rft.aulast=Hauk&rft.aufirst=T&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Integrated mapping and imaging at a legacy test site AN - 1707526034; 2015-080733 AB - A team of multi-disciplinary geoscientists was tasked to characterize and evaluate a legacy nuclear detonation site in order to develop research locations with the long-term goal of improving treaty monitoring, verification, and other national security applications. There was a test at the site of interest that was detonated on June 12, 1985 in a vertical emplacement borehole at a depth of 608m below the surface in rhyolites. With announced yield of 20-150 kt, the event did not collapse to the surface and form a crater, but rather experienced a subsurface collapse with more subtle surface expressions of deformation. This result provides the team with an opportunity to evaluate a number of surface and subsurface inspection technologies in a broad context. The team collected ground-based visual observation, ground penetrating radar, electromagnetic, ground-based and airborne LiDAR, ground-based and airborne hyperspectral, gravity and magnetics, dc and induction electrical methods, and active seismic data during field campaigns in the summers of 2012 and 2013. Detection of features was performed using various approaches that were assessed for accuracy, efficiency and diversity of target features. For example, whereas the primary target of the ground-based visual observation survey was to map the surface features, the target of the gravity survey was to attempt the detection of a possible subsurface collapse zone which might be located as little as 200 meters below the surface. The datasets from surveys described above are integrated into a geographical information system (GIS) database for analysis and visualization. Other presentations during this session provide further details as to some of the work conducted. JF - American Geophysical Union Fall Meeting AU - Sussman, A J AU - Schultz-Fellenz, E S AU - Kelley, R E AU - Sweeney, J J AU - Vigil, S AU - DiBenedetto, J AU - Chipman, V AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S31E EP - 03 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707526034?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+mapping+and+imaging+at+a+legacy+test+site&rft.au=Sussman%2C+A+J%3BSchultz-Fellenz%2C+E+S%3BKelley%2C+R+E%3BSweeney%2C+J+J%3BVigil%2C+S%3BDiBenedetto%2C+J%3BChipman%2C+V%3BAnonymous&rft.aulast=Sussman&rft.aufirst=A&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - How big was it? Getting at yield AN - 1707525976; 2015-080608 AB - One of the most coveted pieces of information in the wake of a nuclear test is the explosive yield. Determining the yield from remote observations, however, is not necessarily a trivial thing. For instance, recorded observations of seismic amplitudes, used to estimate the yield, are significantly modified by the intervening media, which varies widely, and needs to be properly accounted for. Even after correcting for propagation effects such as geometrical spreading, attenuation, and station site terms, getting from the resulting source term to a yield depends on the specifics of the explosion source model, including material properties, and depth. Some formulas are based on assumptions of the explosion having a standard depth-of-burial and observed amplitudes can vary if the actual test is either significantly overburied or underburied. We will consider the complications and challenges of making these determinations using a number of standard, more traditional methods and a more recent method that we have developed using regional waveform envelopes. We will do this comparison for recent declared nuclear tests from the DPRK. We will also compare the methods using older explosions at the Nevada Test Site with announced yields, material and depths, so that actual performance can be measured. In all cases, we also strive to quantify realistic uncertainties on the yield estimation. JF - American Geophysical Union Fall Meeting AU - Pasyanos, M AU - Walter, W R AU - Ford, S R AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2401 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707525976?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=How+big+was+it%3F+Getting+at+yield&rft.au=Pasyanos%2C+M%3BWalter%2C+W+R%3BFord%2C+S+R%3BAnonymous&rft.aulast=Pasyanos&rft.aufirst=M&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Waveform prediction with travel time model LLNL-G3D assessed by spectral-element simulation AN - 1707525856; 2015-080601 AB - Seismic monitoring requires accurate prediction of travel times, amplitudes, and whole waveforms. As a first step towards developing a model that is suited to seismic monitoring, LLNL developed the LLNL-G3D P-wave travel time model (Simmons et al., 2012, JGR) to improve seismic event location accuracy. LLNL-G3D fulfills the need to predict travel times from events occurring anywhere in the globe to stations ranging from local to teleseismic distances. Prediction over this distance range requires explicit inclusion of detailed 3-dimensional structure from Earths surface to the core. An open question is how well a model optimized to fit P-wave travel time data can predict waveforms? We begin to address this question by using the P-wave velocities in LLNL-G3D as a proxy for S-wave velocity and density, then performing waveform simulations via the SPECFEM3D (sub GLOBE) spectral-element code. We assess the ability of LLNL-G3D to predict waveforms and draw comparisons to other 3D models available in SPECFEM3D (sub GLOBE) package and widely used in the scientific community. Although we do not expect the P-wave model to perform as well as waveform based models, we view our effort as a first step towards accurate prediction of time times, amplitudes and full waveforms based on a single model. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Morency, C AU - Simmons, N A AU - Myers, S C AU - Johannesson, G AU - Matzel, E AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2394 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707525856?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Waveform+prediction+with+travel+time+model+LLNL-G3D+assessed+by+spectral-element+simulation&rft.au=Morency%2C+C%3BSimmons%2C+N+A%3BMyers%2C+S+C%3BJohannesson%2C+G%3BMatzel%2C+E%3BAnonymous&rft.aulast=Morency&rft.aufirst=C&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Discrete and continuum simulations of near-field ground motion from Source Physics Experiments (SPE) AN - 1707525712; 2015-080735 AB - This work is focused on analysis of near-field measurements (up to 100 m from the source) recorded during Source Physics Experiments in a granitic formation. One of the main goals of these experiments is to investigate the possible mechanisms of shear wave generation in the nonlinear source region. SPE experiments revealed significant tangential motion (up to 30 % of the magnitude in the radial direction) at many locations. Furthermore, azimuthal variations in radial velocities were also observed which cannot be generated by a spherical source in isotropic materials. Understanding the nature of this non-radial motion is important for discriminating between the natural seismicity and underground explosions signatures. Possible mechanisms leading to such motion include, but not limited to, heterogeneities in the rock such as joints, faults and geologic layers as well as surface topography and vertical motion at the surface caused by material spall and gravity. We have performed a three dimensional computational studies considering all these effects. Both discrete and continuum methods have been employed to model heterogeneities. In the discrete method, the joints and faults were represented by cohesive contact elements. This enables us to examine various friction laws at the joints which include softening, dilatancy, water saturation and rate-dependent friction. Yet this approach requires the mesh to be aligned with joints, which may present technical difficulties in three dimensions when multiple non-persistent joints are present. In addition, the discrete method is more computationally expensive. The continuum approach assumes that the joints are stiff and the dilatancy and shear softening can be neglected. In this approach, the joints are modeled as weakness planes within the material, which are imbedded into and pass through many finite elements. The advantage of this approach is that it requires neither sophisticated meshing algorithms nor contact detection algorithm. It is also suitable for evaluating the bounds of possible shear motion due to uncertainties in the joints distribution. Details of this uncertainty quantification study are presented in a separate abstract (Vorobiev, et.al). In the present work using both the continuum and the discrete approaches we study the effects of the surface spall, in-situ stress and joint orientation on the observed near-field motion. Three dimensional numerical simulations are performed for different burial depths and yields to investigate scalability of both radial and shear motions. The motion calculated in the near-field is then propagated into a far field. Results of the far field study are presented in an accompanied work (Pitarka, et al). This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Ezzedine, S M AU - Vorobiev, O AU - Herbold, E B AU - Glenn, L A AU - Antoun, T AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S31E EP - 05 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707525712?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Discrete+and+continuum+simulations+of+near-field+ground+motion+from+Source+Physics+Experiments+%28SPE%29&rft.au=Ezzedine%2C+S+M%3BVorobiev%2C+O%3BHerbold%2C+E+B%3BGlenn%2C+L+A%3BAntoun%2C+T%3BAnonymous&rft.aulast=Ezzedine&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Regional seismic methods of identifying explosions AN - 1707525158; 2015-080606 AB - A lesson from the 2006, 2009 and 2013 DPRK declared nuclear explosion Ms:mb observations is that our historic collection of data may not be representative of future nuclear test signatures (e.g. Selby et al., 2012). To have confidence in identifying future explosions amongst the background of other seismic signals, we need to put our empirical methods on a firmer physical footing. Here we review the two of the main identification methods: 1) P/S ratios and 2) Moment Tensor techniques, which can be applied at the regional distance (200-1600 km) to very small events, improving nuclear explosion monitoring and confidence in verifying compliance with the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Amplitude ratios of seismic P-to-S waves at sufficiently high frequencies ( nearly equal >2 Hz) can identify explosions among a background of natural earthquakes (e.g. Walter et al., 1995). However the physical basis for the generation of explosion S-waves, and therefore the predictability of this P/S technique as a function of event properties such as size, depth, geology and path, remains incompletely understood. Calculated intermediate period (10-100s) waveforms from regional 1-D models can match data and provide moment tensor results that separate explosions from earthquakes and cavity collapses (e.g. Ford et al. 2009). However it has long been observed that some nuclear tests produce large Love waves and reversed Rayleigh waves that complicate moment tensor modeling. Again the physical basis for the generation of these effects from explosions remains incompletely understood. We are re-examining regional seismic data from a variety of nuclear test sites including the DPRK and the former Nevada Test Site (now the Nevada National Security Site (NNSS)). Newer relative amplitude techniques can be employed to better quantify differences between explosions and used to understand those differences in term of depth, media and other properties. We are also making use of the Source Physics Experiments (SPE) at NNSS. The SPE chemical explosions are explicitly designed to improve our understanding of emplacement and source material effects on the generation of shear and surface waves (e.g. Snelson et al., 2013). Our goal is to improve our explosion models and our ability to understand and predict where P/S and moment tensor methods of identifying explosions work, and any circumstances where they may not. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Walter, W R AU - Ford, S R AU - Pasyanos, M AU - Pyle, M L AU - Hauk, T F AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2399 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707525158?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+seismic+methods+of+identifying+explosions&rft.au=Walter%2C+W+R%3BFord%2C+S+R%3BPasyanos%2C+M%3BPyle%2C+M+L%3BHauk%2C+T+F%3BAnonymous&rft.aulast=Walter&rft.aufirst=W&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Communicating scientific findings to lawyers, policy-makers, and the public AN - 1707524901; 2015-080683 AB - This presentation will summarize the authors' collaborative research on inferential errors, bias and communication difficulties that have arisen in the area of WMD forensics. This research involves analysis of problems that have arisen in past national security investigations, interviews with scientists from various disciplines whose work has been used in WMD investigations, interviews with policy-makers, and psychological studies of lay understanding of forensic evidence. Implications of this research for scientists involved in nuclear explosion monitoring will be discussed. Among the issues covered will be: - Potential incompatibilities between the questions policy makers pose and the answers that experts can provide. - Common misunderstandings of scientific and statistical data. - Advantages and disadvantages of various methods for describing and characterizing the strength of scientific findings. - Problems that can arise from excessive hedging or, alternatively, insufficient qualification of scientific conclusions. - Problems that can arise from melding scientific and non-scientific evidence in forensic assessments. JF - American Geophysical Union Fall Meeting AU - Thompson, W AU - Velsko, S P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S24B EP - 01 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707524901?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Communicating+scientific+findings+to+lawyers%2C+policy-makers%2C+and+the+public&rft.au=Thompson%2C+W%3BVelsko%2C+S+P%3BAnonymous&rft.aulast=Thompson&rft.aufirst=W&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Analysis of recorded and simulated far-field ground motion from the source physics experiment AN - 1707524249; 2015-080738 AB - The Source Physics Experiment (SPE) provides new data for investigating the excitation and propagation of seismic waves generated by buried explosions. The main subjects of our ongoing investigation are the generation of shear-waves, propagation of seismic energy at local and regional distances, and development of numerical techniques for simulating ground motion from underground explosions using physics based source models for different emplacement conditions. We will present an overview of our investigation results based on analysis of far-field waveforms recorded by five linear arrays of stations within 10 km of the shot point, and a small array of stations, with a 2km epicentral distance. We tested the efficiency of our numerical scheme that uses three-dimensional hydrodynamic methods, coupled with an anelastic wave propagation finite-difference method to model the explosion source and ground motion recorded at far-field stations. The best source models that fit the recorded shear and compressional near-field motion, and a calibrated 3D local velocity model, were used to evaluate the sensitivity of wave propagation near the source region to source process, including spall, underground structure, high frequency wave scattering, and surface topography. In particular, we focused on the contribution of these effects to S-wave generation and P/S amplitude ratio in the modeled frequency range of 0.1-8Hz. JF - American Geophysical Union Fall Meeting AU - Pitarka, A AU - Mellors, R J AU - Vorobiev, O Y AU - Rodgers, A J AU - Walter, W R AU - Antoun, T AU - Matzel, E AU - Ford, S R AU - Wagoner, J L AU - Petersson, A AU - Sjogreen, B AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S31E EP - 08 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707524249?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+recorded+and+simulated+far-field+ground+motion+from+the+source+physics+experiment&rft.au=Pitarka%2C+A%3BMellors%2C+R+J%3BVorobiev%2C+O+Y%3BRodgers%2C+A+J%3BWalter%2C+W+R%3BAntoun%2C+T%3BMatzel%2C+E%3BFord%2C+S+R%3BWagoner%2C+J+L%3BPetersson%2C+A%3BSjogreen%2C+B%3BAnonymous&rft.aulast=Pitarka&rft.aufirst=A&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Bulk and compound-specific isotope analysis of long-chain n-alkanes from a 85,000 year sediment core from Lake Peten Peten Itza, Guatemala AN - 1707521084; 2015-083302 AB - Sediment core PI-6 from Lake Peten Itza, Guatemala possesses an 85-ka record of climate from lowland Central America. Variations in sediment lithology suggest large, abrupt changes in precipitation during the last glacial and deglacial periods, and into the early Holocene. Study of cores from nearby Lake Quexil demonstrated the utility of using the carbon isotopic composition of leaf wax n-alkanes to infer changes in terrestrial vegetation (Huang et al. 2001). Forty-nine samples were taken from composite Peten Itza core PI-6 to measure carbon isotopes of bulk organic carbon and long-chain n alkanes. Changes in delta 13C values indicate shifts in the relative proportion of C3 to C4 biomass. The record shows largest delta 13C variations are associated with Heinrich Events. Carbon isotope values in sediments deposited during the Last Glacial Maximum (LGM) indicate moderate precipitation and little rainfall fluctuation. The deglacial was a period of pronounced climate variability, e.g. the Boelling-Allerod and Younger Dryas. Arid times of the deglacial were inferred from samples with the greatest delta 13C values in organic matter, reflecting the largest proportion of C4 plants. Such inferences are supported by stable isotope measurements on ostracod shells and analysis of pollen from the same sample depths in core PI-6. Carbon stable isotope measures on bulk organic carbon and n alkane compounds show similar trends throughout the record and the C:N ratio of Peten Itza sediments indicates a predominantly allochthonous source for bulk organic matter. Hence, isotope measures on bulk organic carbon (delta 13CTOC) in sediments from this lake are sufficient to infer climate-driven shifts in vegetation, making n-alkane extraction and isotope analysis superfluous. JF - American Geophysical Union Fall Meeting AU - Mays, J AU - Brenner, M AU - Curtis, J H AU - Curtis, K AU - Hodell, D A AU - Correa-Metrio, A AU - Escobar, J AU - Dutton, A L AU - Zimmerman, A R AU - Guilderson, T P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract PP43B EP - 2081 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707521084?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Bulk+and+compound-specific+isotope+analysis+of+long-chain+n-alkanes+from+a+85%2C000+year+sediment+core+from+Lake+Peten+Peten+Itza%2C+Guatemala&rft.au=Mays%2C+J%3BBrenner%2C+M%3BCurtis%2C+J+H%3BCurtis%2C+K%3BHodell%2C+D+A%3BCorrea-Metrio%2C+A%3BEscobar%2C+J%3BDutton%2C+A+L%3BZimmerman%2C+A+R%3BGuilderson%2C+T+P%3BAnonymous&rft.aulast=Mays&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - SIG-VISA; signal-based vertically integrated seismic monitoring AN - 1707520641; 2015-080622 AB - Traditional seismic monitoring systems rely on discrete detections produced by station processing software; however, while such detections may constitute a useful summary of station activity, they discard large amounts of information present in the original recorded signal. We present SIG-VISA (Signal-based Vertically Integrated Seismic Analysis), a system for seismic monitoring through Bayesian inference on seismic signals. By directly modeling the recorded signal, our approach incorporates additional information unavailable to detection-based methods, enabling higher sensitivity and more accurate localization using techniques such as waveform matching. SIG-VISA's Bayesian forward model of seismic signal envelopes includes physically-derived models of travel times and source characteristics as well as Gaussian process (kriging) statistical models of signal properties that combine interpolation of historical data with extrapolation of learned physical trends. Applying Bayesian inference, we evaluate the model on earthquakes as well as the 2009 DPRK test event, demonstrating a waveform matching effect as part of the probabilistic inference, along with results on event localization and sensitivity. In particular, we demonstrate increased sensitivity from signal-based modeling, in which the SIGVISA signal model finds statistical evidence for arrivals even at stations for which the IMS station processing failed to register any detection. JF - American Geophysical Union Fall Meeting AU - Moore, D AU - Mayeda, K M AU - Myers, S C AU - Russell, S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2415 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707520641?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=SIG-VISA%3B+signal-based+vertically+integrated+seismic+monitoring&rft.au=Moore%2C+D%3BMayeda%2C+K+M%3BMyers%2C+S+C%3BRussell%2C+S%3BAnonymous&rft.aulast=Moore&rft.aufirst=D&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Seismic site characterization through joint modeling of complementary data functionals, with applications to Santo Domingo, Dominican Republic AN - 1703690170; 2015-078102 AB - New approaches suggest that it may be possible to determine ground shaking during earthquakes through low-cost, non-invasive seismic surveys that make use of ambient noise, and that the results can be used for "shake-casting" to produce scenarios for the purposes of urban planning, improving community resilience, and emergency response. We will present a strategy for determining seismic "site characterization" through joint modeling of and horizontal to vertical spectral ratios (HVSR) and surface wave dispersion, determined via spatial autocorrelation (SPAC), refraction microtremor (ReMi), and/or multi-channel analysis of surface waves (MASW). Fitting of data functionals by synthetics is driven by global optimization and the models are assessed quantitatively. The products of this approach are shear wave velocity profiles for the shallow subsurface, accompanied by posterior probability distributions and parameter correlation matrices that allow for the assessment of model reliability. Optimization strategies for solving nonlinear problems in geophysics have several advantages over linearized inversions. Jointly fitting dispersion curves and HVSR functionals via global optimization allows us to characterize the space of possible models, assess model reliability, identify parts of the "best-fit" model that are poorly constrained, and guide us toward new data that might improve constraints on the model. Tools such as the posterior probability distribution and the parameter correlation matrix allow us to assess the relative contribution of both types of data to model constraints and how to choose the optimal weights between data types. The joint modeling technique is applied to data acquired in an NSF-funded Pan-American Advanced Studies Institute in Santo Domingo, Dominican Republic, entitled "New Frontiers in Geophysical Research: Bringing New Tools and Techniques to Bear on Earthquake Hazard Analysis and Mitigation", as a proof-of-concept survey in a highly built-up urban environment. JF - American Geophysical Union Fall Meeting AU - Schwed, Martin AU - Pulliam, Jay AU - Sen, Mrinal K AU - Willemann, Ray J AU - Huerta-Lopez, Carlos AU - Moschetti, M P AU - Schmitz, M AU - Louie, J N AU - Polanco, Eugenio AU - Huerfano Moreno, Victor AU - Pasyanos, M AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract NS33A EP - 1682 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703690170?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+site+characterization+through+joint+modeling+of+complementary+data+functionals%2C+with+applications+to+Santo+Domingo%2C+Dominican+Republic&rft.au=Schwed%2C+Martin%3BPulliam%2C+Jay%3BSen%2C+Mrinal+K%3BWillemann%2C+Ray+J%3BHuerta-Lopez%2C+Carlos%3BMoschetti%2C+M+P%3BSchmitz%2C+M%3BLouie%2C+J+N%3BPolanco%2C+Eugenio%3BHuerfano+Moreno%2C+Victor%3BPasyanos%2C+M%3BAnonymous&rft.aulast=Schwed&rft.aufirst=Martin&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Examining earthquake scaling via event ratio levels AN - 1703689831; 2015-078227 AB - A challenge with using corner frequency to interpret stress parameter scaling is that stress drop and apparent stress are related to the cube of the corner frequency. In practice this leads to high levels of uncertainty in measured stress from since the uncertainty in measuring the corner frequency is cubed to determine uncertainty in the stress parameters. We develop a new approach using the low and high frequency levels of spectral ratios between two closely located events recorded at the same stations. This approach has a number of advantages over more traditional corner frequency fitting, either in spectral ratios or individual spectra. First, if the bandwidth of the spectral ratio is sufficient, the levels can be measured at many individual frequency points and averaged, reducing the measurement error. Second the apparent stress (and stress drop) are related to the high frequency level to the 3/2 power so the measurement uncertainty is not as amplified as when using the corner frequency. Finally, if the bandwidth is sufficiently broad to determine both the spectral ratio low and high frequency levels, the apparent stress (or stress drop) ratio can be determined without the need to use any other measurements (e.g., moment, fault area), which of course have their own measurement uncertainties. We will show a number examples taken from a wide variety of crustal earthquake sequences. JF - American Geophysical Union Fall Meeting AU - Walter, W R AU - Yoo, S AU - Mayeda, K M AU - Gok, R AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S11B EP - 2349 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703689831?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Examining+earthquake+scaling+via+event+ratio+levels&rft.au=Walter%2C+W+R%3BYoo%2C+S%3BMayeda%2C+K+M%3BGok%2C+R%3BAnonymous&rft.aulast=Walter&rft.aufirst=W&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Synthesis of acoustic signals from buried seismic sources in the presence of surface topography AN - 1703689763; 2015-078331 AB - Buried seismic sources (such as explosions and earthquakes) can generate acoustic motions in the atmosphere by mechanical coupling of ground motion to atmospheric overpressure along the solid-fluid boundary. The Rayleigh Integral has been used to synthesize acoustic overpressure signals from seismic sources where acceleration time-histories along the boundary are inversely weighted by distance, delayed by travel time and summed at an observation point in the far-field. Typically Rayleigh Integral calculations assume a flat surface between Earth's solid and fluid regions, however topography can result in variations of the overpressure signals due to ground motion amplitude differences at the surface and phase differences along the direction of propagation. This study considers the Rayleigh Integral to compute far-field overpressure using seismic ground motion simulations that include an accurate representation of surface topography. Through a series of numerical experiments we will investigate the partitioning of seismoacoustic energy for near-surface seismic events and attempt to quantify the effect of surface topography on overpressure signals. JF - American Geophysical Union Fall Meeting AU - Rodgers, A J AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S14A EP - 01 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703689763?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Synthesis+of+acoustic+signals+from+buried+seismic+sources+in+the+presence+of+surface+topography&rft.au=Rodgers%2C+A+J%3BAnonymous&rft.aulast=Rodgers&rft.aufirst=A&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Systematic global multiple-event relocation; a case study of Alaska earthquakes from 1900-present AN - 1703689720; 2015-078327 AB - The USGS National Earthquake Information Center (NEIC) is evaluating procedures for conducting systematic, real-time multiple-event relocations on local, regional and global scales using the Lawrence Livermore National Laboratory (LLNL)-developed code Bayesloc. This probabilistic approach to the earthquake location problem simultaneously assesses hypocenter, phase association, travel time corrections and estimates of the precision of travel time measurements to produce a refined set of high-quality locations and associated uncertainties. In addition, Bayesloc can use probabilistic prior constraints on any of the input parameters of well-located earthquakes to further improve posterior distributions. NEIC is using well-documented catalogs of earthquake source parameters in Alaska from 1900-2013 as a case study for how this procedure might function in real time operations. In particular, we are developing procedures to accurately compute ground truth metrics (e.g., GT1 and GT5 events) and well-determined depths from either waveform modeling or correctly identified P-pP and P-sP differential travel times, in order to provide constraining information in the multiple event processing. Our case study in Alaska involves the multiple event relocation of more than 20,000 earthquakes within a region extending from southeastern Alaska ( approximately 130W) to the western-most Aleutian arc ( approximately 175E), using a combination of local, regional and teleseismically derived location and phase information from Alaska Earthquake Information Center (AEIC), NEIC and International Seismological Center (ISC) catalogs. Initial results indicate that producing a high quality multiple event relocation catalog of the entire regions' earthquakes is achievable. Improvements in modeling capabilities at the NEIC and AEIC, made in parallel with the densification of networks from approximately 1990-present, facilitates identification of high-quality reference locations within south-central Alaska. For the Aleutians, improvements in earthquake locations are also achieved, primarily because of better modeling and documentation of earthquake source parameters--in particular, constraints on source depth. Lessons learned on how to best integrate and model local, regional and teleseismic catalogs will be applied by NEIC to a systematic relocation study of the globe on a region-by-region basis. JF - American Geophysical Union Fall Meeting AU - Benz, H AU - Myers, S C AU - Earle, P S AU - Hayes, G P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S13C EP - 05 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703689720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Systematic+global+multiple-event+relocation%3B+a+case+study+of+Alaska+earthquakes+from+1900-present&rft.au=Benz%2C+H%3BMyers%2C+S+C%3BEarle%2C+P+S%3BHayes%2C+G+P%3BAnonymous&rft.aulast=Benz&rft.aufirst=H&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - IODP Expedition 345; hydrothermal alteration of fast-spreading EPR lower crust AN - 1700099389; 2015-070549 AB - Integrated Ocean Drilling Program (IODP) Expedition 345 sampled lower crustal primitive gabbroic rocks that formed at the fast-spreading East Pacific Rise (EPR) and are exposed at the Hess Deep Rift. Site U1415 is located along the southern slope of the intrarift ridge at approximately 4850 m water depth. The primary science results were obtained from coring of two approximately 110 m deep reentry holes (U1415J and U1415P) and one 35-m-deep single-bit hole (U1415I), all co-located within an approximately 200-m-wide area. The metamorphic mineral assemblages in the rocks recovered at Site U1415 record the cooling of primitive gabbroic lithologies from magmatic (>1000 degrees C) to zeolite facies conditions (<200 degrees C) associated with EPR spreading, Cocos-Nazca rifting and exposure onto the seafloor. Amphibolite facies alteration (including rare brown amphibole, secondary clinopyroxene and tremolite-chlorite corona textures between olivine and plagioclase) is sparsely developed in the core, and is intense in only a few samples. Lower grade greenschist (<400 degrees C) and subgreenschist facies (<200 degrees C) alteration of olivine to talc, serpentine, or clay minerals is more pervasive, and is commonly accompanied by prehnite microveins in plagioclase. The intensity of alteration varies with igneous lithology, in particular, the modal abundance of olivine, as well as proximity to zones of brittle fracturing and cataclasis. Mesh textured serpentinization is the most common alteration after olivine, although tremolite-chlorite corona textures are variably developed in all of the olivine-bearing gabbroic lithologies recovered at Site U1415. The freshest lithologies at Site U1415 are found in the Layered Series (Unit II) of Holes U1415I and J and Multi-textured Layered Olivine Gabbro Series (Unit II) in Hole U1415P. The Troctolite Series in Holes U1415J (Unit III) and U1415P (Unit III) are more pervasively altered than the gabbroic series, with U1415J troctolites being more altered ( approximately 80%) than in Hole U1415P ( approximately 65%). This likely reflects the greater brittle deformation in Hole U1415J. Hydrothermal veins occur in limited abundance in all of the rock types recovered at Site U1415, forming networks with no preferred orientation. Amphibole and epidote veins appear to be the earliest formed veins. Chlorite and prehnite veins formed later and have mutually cross-cutting relationships. Zeolite veins are always late, crosscutting all other assemblages and structures. Cataclastic rocks in the Troctolite Series (Unit III) of Hole U1415J record complex interactions between cataclastic faulting, fluid infiltration, alteration and magmatism. The cataclasis is largely localized at two depth intervals in Unit III, where brittle fabrics range from dense-anastomosing fractures, to well-developed breccias and cataclasite; these rocks are commonly intensely metasomatized to chlorite-prehnite assemblages. JF - American Geophysical Union Fall Meeting AU - Marks, N AU - Faak, Kathrin AU - Gillis, K M AU - McCaig, A M AU - Nozaka, T AU - Python, Marie AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract OS43A EP - 1879 PB - American Geophysical Union, Washington, DC VL - 2013 KW - oceanic crust KW - East Pacific KW - Northeast Pacific KW - lithosphere KW - oceanic lithosphere KW - Integrated Ocean Drilling Program KW - North Pacific KW - Pacific Ocean KW - Hess Deep KW - Expedition 345 KW - East Pacific Rise KW - lower crust KW - crust KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700099389?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=IODP+Expedition+345%3B+hydrothermal+alteration+of+fast-spreading+EPR+lower+crust&rft.au=Marks%2C+N%3BFaak%2C+Kathrin%3BGillis%2C+K+M%3BMcCaig%2C+A+M%3BNozaka%2C+T%3BPython%2C+Marie%3BAnonymous&rft.aulast=Marks&rft.aufirst=N&rft.date=2013-12-01&rft.volume=2013&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 2013 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 N1 - SubjectsTermNotLitGenreText - crust; East Pacific; East Pacific Rise; Expedition 345; Hess Deep; Integrated Ocean Drilling Program; lithosphere; lower crust; North Pacific; Northeast Pacific; oceanic crust; oceanic lithosphere; Pacific Ocean ER - TY - JOUR T1 - SPH simulations of volatiles loss from icy satellites during a late heavy bombardment AN - 1700096117; 2015-072416 AB - The present day ice-to-silicate ratio in satellites of the outer solar system can be used to constrain dynamical models of solar system formation. The reason is that a period of intense impact activity after formation of the planets, implied by some dynamical models, could have resulted in significant mass loss, of ice preferentially, from these satellites. The location of Jovian and Saturnian satellites inside the gravity well of these giant planets implies high impact velocities, perhaps as high as 30 km/s. Combined with small satellite masses, a Late Heavy Bombardment may well lead to a significant fraction of a satellite's mass ejected. In a previous study, Nimmo and Korycansky calculate, using a scaling law for vaporization of ice from craters, the total expected ice loss from satellites of Jupiter, Saturn, and Uranus. They find that many satellites should have lost significant fractions (>10%) of their water ice. As many of these satellites do not appear to be significantly depleted in volatiles, this raises questions about the timing or intensity of a late heavy bombardment. But this conclusion depends on some key assumptions regarding the distribution of impactor sizes and velocities, and, critically, the expected mass loss during a single impact. Here we compare predictions of impact-driven mass loss using direct hydrodynamical simulations of the relevant impact events, with the scaling law originally developed for cratering by small impactors. The main advantage of this approach is that we can consider impacts between comparably sized bodies, where a cratering scaling law does not strictly apply. Another advantage of a direct hydro simulation is that we can track escaping mass, rather than vapor production. This is most significant for lower velocity impacts, typical of accretion. This method should also be less sensitive to the choice of equation of state. To resolve preferential ice loss during impacts in the size range of interest here requires high resolution hydrodynamical simulations. We use a sophisticated, SPH based code developed by one of the authors and run on hundreds of nodes of the UCSC astrophysical computer cluster to achieve the desired resolution. JF - American Geophysical Union Fall Meeting AU - Movshovitz, N AU - Nimmo, F AU - Korycansky, D AU - Asphaug, E I AU - Owen, J M AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract P43A EP - 2007 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700096117?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=SPH+simulations+of+volatiles+loss+from+icy+satellites+during+a+late+heavy+bombardment&rft.au=Movshovitz%2C+N%3BNimmo%2C+F%3BKorycansky%2C+D%3BAsphaug%2C+E+I%3BOwen%2C+J+M%3BAnonymous&rft.aulast=Movshovitz&rft.aufirst=N&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Evaluating the potential of the MegaSIMS for nuclear forensics AN - 1696876406; 2015-068516 AB - Nuclear forensics investigates the illicit movement of nuclear materials. Measurements of uranium isotopic compositions are an important key as they permit provenance tracing and determination of intended use. Traditional secondary ion mass spectrometers (SIMS) are incapable of resolving 235UH from 236U due to the high mass resolving power (MRP nearly equal 38,000) needed, significantly limiting their ability to accurately measure 236U/235U, particularly for highly enriched uranium. This limitation can significantly inhibit the ability to establish details about enrichment processes. The MegaSIMS is a unique combination of SIMS and accelerator mass spectrometry (AMS) and allows for molecular interference free measurements, while retaining the spatial resolution and ease of sample preparation common in SIMS analyses. The instrument was primarily designed to measure the oxygen isotope composition of the solar wind [1] and its capability for measuring high mass elements has not been evaluated previously. We evaluated the potential of the MegaSIMS by measuring 236U/235U without hydride interference. While preliminary results show abundance sensitivity of nearly equal E-9 and an MRP of nearly equal 1,200 at the high mass side of 238 amu, precision is limited by the detector geometry and slow magnet switching. Future work will include developing electrostatic peak switching as well as refining the measurement precision and abundance sensitivity of the MegaSIMS for nuclear forensics. [1] McKeegan, Kallio, Heber, Jarzebinski, Mao, Coath, Kunihiro, Wiens, Nordholt, Moses Jr., Reisenfeld, Jurewicz, and Burnett, 2011. Science. 332, 1528-1532. JF - American Geophysical Union Fall Meeting AU - Boehnke, P AU - McKeegan, Kevin D AU - Coath, Chris D AU - Hutcheon, I D AU - Steele, R C AU - Harrison, T Mark AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract V51F EP - 06 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696876406?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Evaluating+the+potential+of+the+MegaSIMS+for+nuclear+forensics&rft.au=Boehnke%2C+P%3BMcKeegan%2C+Kevin+D%3BCoath%2C+Chris+D%3BHutcheon%2C+I+D%3BSteele%2C+R+C%3BHarrison%2C+T+Mark%3BAnonymous&rft.aulast=Boehnke&rft.aufirst=P&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Number of references - 1 N1 - PubXState - DC N1 - Last updated - 2015-07-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Uncertainty propagation and quantification using constrained coupled adaptive forward-inverse schemes; theory and applications AN - 1696874751; 2015-066340 AB - The success of implementation and execution of numerous subsurface energy technologies such shale gas extraction, geothermal energy, underground coal gasification rely on detailed characterization of the geology and the subsurface properties. For example, spatial variability of subsurface permeability controls multi-phase flow, and hence impacts the prediction of reservoir performance. Subsurface properties can vary significantly over several length scales making detailed subsurface characterization unfeasible if not forbidden. Therefore, in common practices, only sparse measurements of data are available to image or characterize the entire reservoir. For example pressure, P, permeability, k, and production rate, Q, measurements are only available at the monitoring and operational wells. Elsewhere, the spatial distribution of k is determined by various deterministic or stochastic interpolation techniques and P and Q are calculated from the governing forward mass balance equation assuming k is given at all locations. Several uncertainty drivers, such as PSUADE, are then used to propagate and quantify the uncertainty (UQ) of quantities (variable) of interest using forward solvers. Unfortunately, forward-solver techniques and other interpolation schemes are rarely constrained by the inverse problem itself: given P and Q at observation points determine the spatially variable map of k. The approach presented here, motivated by fluid imaging for subsurface characterization and monitoring, was developed by progressively solving increasingly complex realistic problems. The essence of this novel approach is that the forward and inverse partial differential equations are the interpolator themselves for P, k and Q rather than extraneous and sometimes ad hoc schemes. Three cases with different sparsity of data are investigated. In the simplest case, a sufficient number of passive pressure data (pre-production pressure gradients) are given. Here, only the inverse hyperbolic equation for the distribution of k is solved, provided that Cauchy data are appropriately assigned. In the next stage, only a limited number of passive measurements are provided. In this case, the forward and inverse PDEs are solved simultaneously. This is accomplished by adding regularization terms and filtering the pressure gradients in the inverse problem. Both the forward and the inverse problem are either simultaneously or sequentially coupled and solved using implicit schemes, adaptive mesh refinement, Galerkin finite elements. The final case arises when P, k, and Q data only exist at producing wells. This exceedingly ill posed problem calls for additional constraints on the forward-inverse coupling to insure that the production rates are satisfied at the desired locations. Results from all three cases are presented demonstrating stability and accuracy of the proposed approach and, more importantly, providing some insights into the consequences of data under sampling, uncertainty propagation and quantification. We illustrate the advantages of this novel approach over the common UQ forward drivers on several subsurface energy problems in either porous or fractured or/and faulted reservoirs. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Ryerson, F J AU - Ezzedine, S M AU - Antoun, T AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H31I EP - 06 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696874751?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Uncertainty+propagation+and+quantification+using+constrained+coupled+adaptive+forward-inverse+schemes%3B+theory+and+applications&rft.au=Ryerson%2C+F+J%3BEzzedine%2C+S+M%3BAntoun%2C+T%3BAnonymous&rft.aulast=Ryerson&rft.aufirst=F&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Microbial ecology of a regional flow system; deep, aerobic, fractured rock aquifers of the US Basin and Range AN - 1696873171; 2015-066309 AB - Recent decades have revealed anaerobic microbial ecosystems across a range of deep, continental settings; however, aerobic, regional aquifers represent a little-studied habitat for deep life. The US' Basin and Range Province is an extensional zone defined by deep, interconnected fracture systems that span multiple hydrologic basins and host regional aquifers. Here we describe a multi-basin microbiological assessment, applied to the Death Valley Regional Flow System (DVRFS). Our group has surveyed more than thirty deep boreholes ( nearly equal 1,000 m depth average) and deeply-sourced springs across a nearly equal 170 km inferred flow path from recharge areas in volcanic and carbonate rock highlands of the Nevada National Security Site (NNSS) and the Spring Mountains to discharge zones in Oasis, Amargosa, and Death Valleys. DVRFS waters were characterized by temperatures of 30 - 50 degrees C and the presence of dissolved O2 (4 - 8 mg/L in the recharge areas and nearly equal 0.2 - 2 mg/L in the discharge zones). Planktonic microbial populations, as tracked by molecular DNA approaches (e.g. 454 pyrotag), were of low abundance (e.g. nearly equal 10e3 nearly equal 10e6 per mL) and dominated by Proteobacteria and Nitrospirae. Archaea were also present and dominated by novel Thaumarchaeotes. Patterns of microbial diversity and the hypothesis that these patterns may have utility for recognition of hydrologic connectivity were assessed by statistical tools. At the species level, cosmopolitan, system-wide, and flow-path-specific groupings of both bacteria and archaea were detected. Even when in close proximity to aerobic springs and wells, sites sampling deep, hot, anaerobic groundwaters possessed completely distinct microbial populations (e.g. dominance by Firmicutes, ANME, and predicted methanogens). Among methodological refinements developed from this work, the repeated sampling of one deep borehole over a month-long pump test revealed that well-bore-associated contaminants required several days of pumping for complete removal and enabled the identification of the specific depth that produced most of the water. Our results reveal details of microbial community structure for a common, but little-studied microbial ecosystem and support the concept that regional flow systems possess distinct microbial populations, consistent with their geochemical and hydrologic characteristics. These results generally support the concept that microbial populations may have utility as amplifiable tracers for tracking the connectivity of fluids in the subsurface. JF - American Geophysical Union Fall Meeting AU - Moser, D P AU - Hamilton-Brehm, S AU - Zhang, G AU - Fisher, J AU - Hughes, K AU - Wheatley, A AU - Thomas, J AU - Zavarin, M AU - Roberts, S K AU - Kryder, L AU - McRae, R AU - Howard, W AU - Walker, J AU - Federwisch, R AU - King, M AU - Friese, R AU - Grim, S AU - Amend, J AU - Momper, L AU - Sherwood Lollar, B AU - Onstott, T C AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H31G EP - 1269 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696873171?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Microbial+ecology+of+a+regional+flow+system%3B+deep%2C+aerobic%2C+fractured+rock+aquifers+of+the+US+Basin+and+Range&rft.au=Moser%2C+D+P%3BHamilton-Brehm%2C+S%3BZhang%2C+G%3BFisher%2C+J%3BHughes%2C+K%3BWheatley%2C+A%3BThomas%2C+J%3BZavarin%2C+M%3BRoberts%2C+S+K%3BKryder%2C+L%3BMcRae%2C+R%3BHoward%2C+W%3BWalker%2C+J%3BFederwisch%2C+R%3BKing%2C+M%3BFriese%2C+R%3BGrim%2C+S%3BAmend%2C+J%3BMomper%2C+L%3BSherwood+Lollar%2C+B%3BOnstott%2C+T+C%3BAnonymous&rft.aulast=Moser&rft.aufirst=D&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Cosmogenic nuclide exposure dating of the Tiltill rock avalanche, Yosemite National Park AN - 1692746443; 2015-063144 AB - Yosemite National Park serves as an excellent natural laboratory for studying rock falls and rock avalanches because these are the main processes modifying the nearly vertical slopes of this recently glaciated landscape. Mass wasting represents a significant hazard in the region and the database of previous rock falls and other mass wasting events in Yosemite is extensive, dating back to the mid-1800s. However, this record is too short to capture the recurrence characteristics and triggering mechanisms of the very largest events, necessitating studies of the geologic record of mass wasting. Rock falls and rock avalanches are readily dated by cosmogenic nuclide methods due to their instantaneous formation, and results can be tied to triggering events such as seismic activity (e.g. Stock et al., 2009). Here, we apply exposure dating to the Holocene Tiltill rock avalanche north of Hetch Hetchy Reservoir. The deposit comprises what appear to be two separate lobes of rock and debris, yielding a total volume of approximately 3.1X10 (super 6) m (super 3) . Assuming an erosion rate of 0.0006 cm/yr and neglecting snowpack shielding, preliminary data suggest a mean exposure age of 11,000+600 year B.P. for both deposits, indicating that they were emplaced in a single event. The age of the Tiltill "slide" is similar to earthquakes on the Owens Valley Fault between 10,800+600 and 10,200+200 cal year B.P. (Bacon, 2007) and the White Mountain Fault, approximately 10,000 cal year B.P. (Reheis, 1996; DePolo, 1989). Given that movement on the Owens Valley fault in 1872 caused a number of rock falls in Yosemite and the coincidence of ages between the Tiltill "slide" and paleoseismic events, a large earthquake in Eastern Sierra Nevada may have triggered this event. Other trigger events are also possibilities, but only through compilation of a database of large rock avalanches can statistically significant groupings of events begin to demonstrate whether seismic triggering is a dominant process. JF - American Geophysical Union Fall Meeting AU - Ford, Kiersti Rae AU - Pluhar, C J AU - Stone, J O AU - Stock, Greg M AU - Zimmerman, S R AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract NH21A EP - 1495 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692746443?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cosmogenic+nuclide+exposure+dating+of+the+Tiltill+rock+avalanche%2C+Yosemite+National+Park&rft.au=Ford%2C+Kiersti+Rae%3BPluhar%2C+C+J%3BStone%2C+J+O%3BStock%2C+Greg+M%3BZimmerman%2C+S+R%3BAnonymous&rft.aulast=Ford&rft.aufirst=Kiersti&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Bingham Canyon landslide; force history analysis and identification of induced earthquakes AN - 1692744802; 2015-063136 AB - On 10 April 2013 two massive rock avalanches, separated in time by 1.5 hours, occurred at the Bingham Canyon copper mine located in the Oquirrh Mountains near Salt Lake City, UT. Following the first slide, small (ML < or = 2.5) tectonic earthquakes began occurring beneath the mine area, suggesting the earthquakes were triggered by the rock avalanches. Seismic data from the landslide events and tectonic quakes were well recorded by the Utah Regional Seismic Network. Signals from the rock avalanches are broadband and have a duration approaching two minutes each. Magnitude estimates for the two slides vary considerably based on methodology (slide 1: ML 2.5, MC 4.2, MSW 5.0; slide 2: ML 2.4, MC 3.5, MSW 4.9), which is indicative of a non-earthquake source. Initial estimates from Kennecott Utah Copper show that the combined rock avalanches moved a total mass of approximately 150 billion kg, equivalent to a source volume of approximately 55 million m3, and preliminary analysis based on signal duration and peak amplitudes of the seismograms suggest that the two slides were roughly equal in volume. However, when using a time-varying point source to invert for the landslide force history, we find that the second slide was approximately half the volume and half the mass of the first slide. Using the force history, we are also able to track the path of each rock avalanche, with good match to field observations. Waveform template analysis using two weeks of data preceding the rock avalanches show that the induced seismic events began following the first slide. This analysis will be extended further back in time to better determine if these events were induced by the rock avalanches. Earthquakes identified by the template analysis will also be located using newly calculated station delays determined from ground-truth events and relative relocation. If possible, we will also determine first-motion focal mechanisms for the larger induced quakes. The Bingham Canyon rock avalanches are two of the best seismically recorded landslide events in history; given the wealth of available data, we are able to reconstruct the force history and show that landslides can induce earthquakes. JF - American Geophysical Union Fall Meeting AU - Pankow, K L AU - Ford, S R AU - Kubacki, T AU - Koper, K D AU - Whidden, Katherine M AU - Moore, Jeff R AU - McCarter, M K AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract NH14A EP - 02 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692744802?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Bingham+Canyon+landslide%3B+force+history+analysis+and+identification+of+induced+earthquakes&rft.au=Pankow%2C+K+L%3BFord%2C+S+R%3BKubacki%2C+T%3BKoper%2C+K+D%3BWhidden%2C+Katherine+M%3BMoore%2C+Jeff+R%3BMcCarter%2C+M+K%3BAnonymous&rft.aulast=Pankow&rft.aufirst=K&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Enhancing caprock integrity of carbon sequestration reservoirs using colloidal silica gel AN - 1692743084; 2015-059204 AB - Silica gels are abundant in various subsurface applications. For example, it has been used in a) oil and gas industries as permeability reducer, b) geotechnical industry as a stabilizer and c) environmental industry as an isolator, and more recently in d) enhanced geothermal systems as a diverter agent; yet silica gels have not been evaluated for geological carbon sequestration. In the latter, several leakage pathways can compromise the integrity of the reservoir, thus the containment of the injected supercritical carbon dioxide. On one hand, interfacial dislocations around the injection well can lead leakage pathways compromising the well stability and integrity, and on the other, undetected preexisting fracture in the caprock can compromise the containment of the injected carbon dioxide. We propose to use silica gels as a sealing agent to seal fast pathways, minimize any leakages and enhance the overall integrity of the reservoir. Diverting and blocking agents currently used in the industry are often organic polymers that raise environmental concerns; whereas silicas are inorganic and environmentally friendly which underscore their suitability. In the current study we have developed a numerical model to simulate the flow mass and heat transport of silica gel in supercritical CO2 sequestration reservoirs. We illustrate the application of the model for minimizing CO2 leakages to the caprock by using the gel as sealing agent. Several 2D and 3D examples in porous and fractured network will be presented and design criteria for both applications will be discussed. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Roberts, S K AU - Ezzedine, S M AU - Bourcier, W AU - Hunt, J D AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H53C EP - 1435 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692743084?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Enhancing+caprock+integrity+of+carbon+sequestration+reservoirs+using+colloidal+silica+gel&rft.au=Roberts%2C+S+K%3BEzzedine%2C+S+M%3BBourcier%2C+W%3BHunt%2C+J+D%3BAnonymous&rft.aulast=Roberts&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Experiments and simulations describing alteration of wellbore cement/caprock interfaces in the presence of CO2-rich brines AN - 1692743056; 2015-059195 AB - This presentation discusses results from a suite of core flood experiments in which carbonated brine was introduced into artificial fractures separating wellbore cement and a quartz-sandstone caprock. X-ray computed microtomography collected prior-to and following the experiments was employed to spatially resolve the interface and the extent of the reaction fronts, and time dependent solution chemistry tracked the chemical alteration over the course of the experiments. We describe how the propagation of the resulting reaction zones affected the permeability of the core flood samples, and how these permeability changes relate to the fracture geometry. Based on the results of the data, we propose a model describing the relationship between the reaction layers, the brine chemistry, and the mechanical response of these cement interfaces, and discuss the implications for the long time behavior of wellbore-cement interfaces. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Carroll, S AU - Walsh, S D AU - Mason, H E AU - Du Frane, W L AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H53C EP - 1426 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692743056?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Experiments+and+simulations+describing+alteration+of+wellbore+cement%2Fcaprock+interfaces+in+the+presence+of+CO2-rich+brines&rft.au=Carroll%2C+S%3BWalsh%2C+S+D%3BMason%2C+H+E%3BDu+Frane%2C+W+L%3BAnonymous&rft.aulast=Carroll&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Mid-late Holocene North Pacific trade winds as inferred from deep-sea coral skeletal delta (super 15) N and delta (super 13) C biogeochemistry AN - 1692742987; 2015-058806 AB - delta (super 15) N and delta (super 13) C data obtained from samples of proteinaceous deep-sea corals collected from the North Pacific Subtropical Gyre (Hawai'ian archipelago) and the central equatorial Pacific (Line Islands) document multi-decadal to century scale variability in the isotopic composition of surface-produced particulate organic matter exported to the deep sea. Comparison of the delta (super 13) C data, where Line Island samples are 0.6 ppm more positive than the Hawai'ian samples, support the contention that the North Pacific Subtropical Gyre is more efficient than the tropical upwelling system at trapping and/or recycling nutrients within the mixed layer. delta (super 15) N values from the Line Island samples are also more positive than those from the central gyre, and within the Hawai'ian samples there is a gradient with more positive delta (super 15) N values in samples from the main Hawai'ian Islands versus French Frigate Shoals in the Northwestern Hawai'ian Islands. The gradient in the Hawai'ian samples likely reflects the relative importance of algal acquisition of metabolic N via dissolved seawater nitrate uptake versus nitrogen fixation. The Hawai'ian sample set also exhibits a strong decrease in delta (super 15) N values from the mid-Holocene to present. We hypothesize that this decrease is most likely the result of decreasing tradewinds, and possibly a commensurate decrease in entrainment of more positive delta (super 15) N-NO (sub 3) subthermocline water masses. JF - American Geophysical Union Fall Meeting AU - Guilderson, Thomas P AU - McCarthy, M D AU - Dunbar, R B AU - Englebrecht, A AU - Roark, E AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract GC23A EP - 0899 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742987?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mid-late+Holocene+North+Pacific+trade+winds+as+inferred+from+deep-sea+coral+skeletal+delta+%28super+15%29+N+and+delta+%28super+13%29+C+biogeochemistry&rft.au=Guilderson%2C+Thomas+P%3BMcCarthy%2C+M+D%3BDunbar%2C+R+B%3BEnglebrecht%2C+A%3BRoark%2C+E%3BAnonymous&rft.aulast=Guilderson&rft.aufirst=Thomas&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Effects of injected CO (sub 2) on geomechanical properties due to mineralogical changes AN - 1692742899; 2015-059024 AB - Long-term injection and storage of CO (sub 2) in deep underground reservoirs may significantly modify the geomechanical behavior of rocks since CO (sub 2) can react with the constituent phases of reservoir rocks and modify their composition. This can lead to modifications of their geomechanical properties (i.e., elastic moduli, Biot's coefficients, and permeability). Modifications of rock geomechanical properties have important consequences as these directly control stress and strain distributions, affect conditions for fracture initiation and development and/or fault healing. This paper attempts to elucidate the geochemical effects of CO (sub 2) on geomechanical properties of typical reservoir rocks by means of numerical analyses using the STOMP-ABAQUS sequentially coupled simulator that includes the capability to handle geomechanics and the reactive transport of CO (sub 2) together with a module (EMTA) to compute the homogenized rock poroelastic properties as a function of composition changes. EMTA, a software module developed at PNNL, implements the standard and advanced Eshelby-Mori-Tanaka approaches to compute the thermoelastic properties of composite materials. In this work, EMTA will be implemented in the coupled STOMP-ABAQUS simulator as a user subroutine of ABAQUS and used to compute local elastic stiffness based on rock composition. Under the STOMP-ABAQUS approach, STOMP models are built to simulate aqueous and CO (sub 2) multiphase fluid flows, and relevant chemical reactions of pore fluids with minerals in the reservoirs. The ABAQUS models then read STOMP output data for cell center coordinates, gas pressures, aqueous pressures, temperatures, saturations, constituent volume fractions, as well as permeability and porosity that are affected by chemical reactions. These data are imported into ABAQUS meshes using a mapping procedure developed for the exchange of data between STOMP and ABAQUS. Constitutive models implemented in ABAQUS via user subroutines then compute stiffness, stresses, strains, pore pressure, permeability, porosity, and capillary pressure, and return updated permeability, porosity, and capillary pressure to STOMP at selected times. In preliminary work, the enhanced STOMP-ABAQUS sequentially coupled approach is validated and illustrated in an example analysis of a cylindrical rock specimen subjected to axial loading, confining pressure, and CO (sub 2) fluid injection. The geomechanical analysis accounting for CO (sub 2) reactions with rock constituents is compared to that without chemical reactions to elucidate the geochemical effects of injected CO (sub 2) on the response of the reservoir rock to stress. JF - American Geophysical Union Fall Meeting AU - Nguyen, B N AU - Hou, Z AU - Bacon, Diana H AU - Murray, Chris J AU - White, J A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H13M EP - 08 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742899?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+injected+CO+%28sub+2%29+on+geomechanical+properties+due+to+mineralogical+changes&rft.au=Nguyen%2C+B+N%3BHou%2C+Z%3BBacon%2C+Diana+H%3BMurray%2C+Chris+J%3BWhite%2C+J+A%3BAnonymous&rft.aulast=Nguyen&rft.aufirst=B&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Modeling reaction front propagation from preferential flow pathways in fractured media AN - 1692742789; 2015-059046 AB - We present analytical results and numerical models describing the growth and propagation of reaction fronts around fluid flow pathways in fractured rock, and explore how the front geometry influences both the propagation of the reaction fronts and changes in the solution chemistry. We compare model results to core-flood experiments conducted on mated wellbore cement/caprock half-cores, and demonstrate that the model accurately reproduces the observed solution chemistry. In particular the simulations provide a physical explanation for the apparent 'super-diffusive' reaction zone growth suggested by the brine chemistry. We conclude by discussing the implications of the model for long-term behavior of single and multiple reaction fronts. JF - American Geophysical Union Fall Meeting AU - Myint, Philip C AU - Walsh, S D AU - Carroll, S AU - Firoozabadi, Abbas AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H14A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742789?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+reaction+front+propagation+from+preferential+flow+pathways+in+fractured+media&rft.au=Myint%2C+Philip+C%3BWalsh%2C+S+D%3BCarroll%2C+S%3BFiroozabadi%2C+Abbas%3BAnonymous&rft.aulast=Myint&rft.aufirst=Philip&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Isotope fractionation by multicomponent diffusion AN - 1692741452; 2015-059333 AB - Isotope fractionation by multicomponent diffusion The isotopic composition of mineral phases can be used to probe the temperatures and rates of mineral formation as well as the degree of post-mineralization alteration. The ability to interpret stable isotope variations is limited by our knowledge of three key parameters and their relative importance in determining the composition of a mineral grain and its surroundings: (1) thermodynamic (equilibrium) partitioning, (2) mass-dependent diffusivities, and (3) mass-dependent reaction rate coefficients. Understanding the mechanisms of diffusion and reaction in geological liquids, and how these mass transport processes discriminate between isotopes, represents an important problem that is receiving considerable attention in the geosciences. Our focus in this presentation will be isotope fractionation by chemical diffusion. Previous studies have documented that diffusive isotope effects vary depending on the cation as well as the liquid composition, but the ability to predict diffusive isotope effects from theory is limited; for example, it is unclear whether the magnitude of diffusive isotopic fractionations might also vary with the direction of diffusion in composition space. To test this hypothesis and to further guide the theoretical treatment of isotope diffusion, two chemical diffusion experiments and one self diffusion experiment were conducted at 1250 degrees C and 0.7 GPa. In one experiment (A-B), CaO and Na2O counter-diffuse rapidly in the presence of a small SiO2 gradient. In the other experiment (D-E), CaO and SiO2 counter-diffuse more slowly in a small Na2O gradient. In both chemical diffusion experiments, Ca isotopes become fractionated by chemical diffusion but by different amounts, documenting for the first time that the magnitude of isotope fractionation by diffusion depends on the direction of diffusion in composition space. The magnitude of Ca isotope fractionation that develops is positively correlated with the rate of CaO diffusion; in A-B, the total variation is 2.5 ppm whereas in D-E it is only 1.3 ppm. The diffusion of isotopes in a multicomponent system is modeled using a new expression for the isotope-specific diffusive flux that includes self diffusion terms in addition to the multicomponent chemical diffusion matrix. Kinetic theory predicts a mass dependence on isotopic mobility, i.e., self diffusivity, but it is unknown whether or how the mass dependence on self diffusivity translates into a mass dependence on chemical diffusion coefficients. The new experimental results allow us to assess several empirical expressions relating the self diffusivity and its mass dependence to the elements of the diffusion matrix and their mass dependence. Several plausible theoretical treatments can fit the data equally well. We are currently at the stage where experiments are guiding the theoretical treatment of the isotope fractionation by diffusion problem, underscoring the importance of experiments for aiding interpretations of isotopic variations in nature. JF - American Geophysical Union Fall Meeting AU - Watkins, J M AU - Liang, Y AU - Richter, F M AU - Ryerson, F J AU - DePaolo, D J AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR33C EP - 08 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692741452?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Isotope+fractionation+by+multicomponent+diffusion&rft.au=Watkins%2C+J+M%3BLiang%2C+Y%3BRichter%2C+F+M%3BRyerson%2C+F+J%3BDePaolo%2C+D+J%3BAnonymous&rft.aulast=Watkins&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Evolution of an interfacial crack on the concrete embankment boundary AN - 1692740854; 2015-058881 AB - Failure of a dam can have subtle beginnings: a small crack or dislocation at the interface of the concrete dam and the surrounding embankment soil initiated by a seismic event, for example, can: a) result in creating gaps between the concrete dam and the lateral embankments; b) initiate internal erosion of embankment; and c) lead to a catastrophic failure of the dam. The dam may 'self-rehabilitate' if a properly designed granular filter is engineered around the embankment. Currently, the design criteria for such filters have only been based on experimental studies. We demonstrate the numerical prediction of filter effectiveness at the soil grain scale and relate it to the larger dam scale. Validated computer predictions highlight that a resilient (or durable) filter is consistent with the current design specifications for dam filters. These predictive simulations, unlike the design specifications, can be used to assess filter success or failure under different soil or loading conditions and can lead to meaningful estimates of the timing and nature of full-scale dam failure. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and was sponsored by the Department of Homeland Security (DHS), Science and Technology Directorate, Homeland Security Advanced Research Projects Agency (HSARPA). JF - American Geophysical Union Fall Meeting AU - Smith, Jarrell AU - Ezzedine, S M AU - Lomov, I AU - Kanarska, Y AU - Antoun, T AU - Glascoe, L G AU - Hall, Robert L AU - Woodson, Stanley C AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H13B EP - 1326 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740854?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+an+interfacial+crack+on+the+concrete+embankment+boundary&rft.au=Smith%2C+Jarrell%3BEzzedine%2C+S+M%3BLomov%2C+I%3BKanarska%2C+Y%3BAntoun%2C+T%3BGlascoe%2C+L+G%3BHall%2C+Robert+L%3BWoodson%2C+Stanley+C%3BAnonymous&rft.aulast=Smith&rft.aufirst=Jarrell&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - Vulnerability of groundwater recharge to climate change in an alpine basin (Martis Valley, California) AN - 1689592435; 2015-056482 AB - Martis Valley's groundwater basin is experiencing increasing water demand and changes in the amount and timing of snowmelt due to climate change. Groundwater is the exclusive water supply for the town of Truckee and its surrounding ski resorts and golf courses. The objective of this study was to examine seasonal variability in the aquifer recharge by analyzing supply wells for: 1) tritium and helium isotopes to determine groundwater sources and age, 2) dissolved noble gases to determine recharge temperatures and excess air concentrations and 3) stable isotopes to determine groundwater sources. Recharge temperatures were found to be similar to mean annual air temperatures at lower elevations, suggesting that most recharge is occurring at lower elevations after equilibrating in the vadose zone. Low levels of excess air found in groundwater confirm that most recharge is occurring in the valley alluvium rather than the mountain block. The mean integrated groundwater flow depth was estimated for each well from the temperature difference between recharge and discharge and the geothermal gradient. Groundwater samples contained large amounts of excess terrigenic helium, from both mantle and radiogenic sources. Terrigenic helium and tritium concentrations were used to reconstruct the mixing between the younger and older groundwater sources. Mantle helium originating from the Polaris Fault was used to trace groundwater flow directions. Higher seasonal variability was found in wells with younger groundwater and shallower flow depths, suggesting that changes in the timing and amount of recharge under warmer climate conditions will rather quickly impact at least a portion of the aquifer system in Martis Valley. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Visser, A AU - Segal, D AU - Uriostegui, S H AU - Singleton, M J AU - Moran, J E AU - Esser, B K AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H53F EP - 1481 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689592435?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Vulnerability+of+groundwater+recharge+to+climate+change+in+an+alpine+basin+%28Martis+Valley%2C+California%29&rft.au=Visser%2C+A%3BSegal%2C+D%3BUriostegui%2C+S+H%3BSingleton%2C+M+J%3BMoran%2C+J+E%3BEsser%2C+B+K%3BAnonymous&rft.aulast=Visser&rft.aufirst=A&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Laser compression of iron and quartz relevant to planetary conditions AN - 1689592404; 2015-056554 AB - The recent discovery of extra-solar planets, especially earth-like ones open a new field of application for high energy lasers. Indeed the extreme conditions (330-1500 GPa, 5000-10000K) expected in the core of those objects make lasers as the only tool to be able to generate such high pressures. However traditional dynamical techniques to compress matter involve shock waves that overheat the sample relative to conditions occurring in planetary cores. To overcome this issue, we used a quasi-isentropic laser driven compression technique based on direct drive interaction. Here, we report on recent measurements performed on the LIL (Ligne d'Integration Laser) laser facility at CEA-CESTA in Bordeaux where we did used a dedicated ramp-tailored laser pulse (2-10 kJ, 20 ns). Two materials of interest for telluric planets (iron and quartz) were investigated. Visible diagnostics (VISAR and SOP) were used as main diagnostics giving both velocities and temperature of the sample. The analysis of our results leads to assess that we reproduced conditions existing inside Super-Earths, Uranus and Neptune, in the range 200-800 GPa and temperature below 8000K. To do this for quartz, we developed a novel technique coupling a well-controlled shock followed by a quasi-isentropic compression. We then investigated a wide region around the melting curve. Results are compared with ab initio calculations. This ability of using very high energy lasers opens a new route for planetary science especially when isentropic compression will be associated to x-ray sources inferring the microscopic structure of the sample. This work has been supported by the ANRs SECHEL and PLANETLAB. JF - American Geophysical Union Fall Meeting AU - Benuzzi-Mounaix, Alessandra AU - Vinci, T AU - Brambrink, Erik AU - Amadou, N AU - Koenig, Michel AU - Huser, Gael AU - Brygoo, Stephanie AU - Bouchet, Johann AU - Morard, Guillaume AU - Guyot, Francois J AU - de Resseguier, T AU - Miyanishi, K AU - Ozaki, Norimasa AU - Henry, Olivier AU - Raffestin, Didier AU - Smith, R AU - Duffy, T S AU - Wang, Jue AU - Mazevet, Stephane AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR13B EP - 08 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689592404?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Laser+compression+of+iron+and+quartz+relevant+to+planetary+conditions&rft.au=Benuzzi-Mounaix%2C+Alessandra%3BVinci%2C+T%3BBrambrink%2C+Erik%3BAmadou%2C+N%3BKoenig%2C+Michel%3BHuser%2C+Gael%3BBrygoo%2C+Stephanie%3BBouchet%2C+Johann%3BMorard%2C+Guillaume%3BGuyot%2C+Francois+J%3Bde+Resseguier%2C+T%3BMiyanishi%2C+K%3BOzaki%2C+Norimasa%3BHenry%2C+Olivier%3BRaffestin%2C+Didier%3BSmith%2C+R%3BDuffy%2C+T+S%3BWang%2C+Jue%3BMazevet%2C+Stephane%3BAnonymous&rft.aulast=Benuzzi-Mounaix&rft.aufirst=Alessandra&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Contrasts between deformation accommodated by induced seismic and aseismic processes revealed by combined monitoring of seismicity and surface deformations; Brady geothermal field, Nevada, USA AN - 1689592039; 2015-056531 AB - Fluid pressure change accompanying pumping in the Brady Geothermal Field is associated with two easily measureable deformation responses: (1) surface deformations and 2) seismic slip. Surface deformation can be imaged by InSAR and appears to correspond to volume change at depth. Seismic slip on fractures is likely induced by either changes in effective normal stress or solid stress with minimal impact to volume. Both responses have potential impact on permeability structure due to dilation or compaction along natural fractures. We present an integrated data set that compares pumping records with these deformation responses to investigate their coupling and to constrain the geometry and rheology of the reservoir and surrounding crust. We also seek to clarify the relationship between induced seismicity and pumping. Currently, the dominant pumping signal is pressure reduction resulting from on-going production since 1992. Surface subsidence extends over a region of approximately 5 km by 2 km with the long axis along the strike of the major normal faults associated with the reservoir. Smaller approximately 1 km length-scale regions of intense subsidence are associated bends or intersections among individual normal fault segments. Modeling of the deformation source indicates that the broader subsidence pattern is consistent with the majority of fluid extraction from a reservoir at a depth of approximately 1 km and extending along the entire length of the mapped Brady normal fault. The more intense subsidence is consistent with fluid extraction along steep conduits from shallower depths that extend to the main reservoir. These results indicate a reservoir much larger than would be expected from the footprint of the production wells. In contrast, seismicity is primarily concentrated along a narrow path between injecting and producing wells, but outside the regions of most intense subsidence. Overall, seismicity represents only a small fraction of the strain energy associated with subsidence. During the latter half of 2013, Enhanced Geothermal Systems demonstration well 15-12ST1, located immediately SSW of the current production area along the direction of the structural trend and SHmax, will be stimulated to expand the reservoir, providing the opportunity to evaluate injection dominated behavior. Along with a geomechanical model of the stress state from borehole observations and well testing, modeling of the deformation and pumping history provides a key means to characterize the stress state and pre-stimulation reservoir properties. Continued monitoring of surface deformation and seismicity accompanying production and injection following stimulation will test if the stimulation significantly pre-existing patterns. JF - American Geophysical Union Fall Meeting AU - Davatzes, N C AU - Ali, S T AU - Mellors, R J AU - Foxall, W AU - Wang, H F AU - Feigl, K L AU - Drakos, P S AU - Zemach, E AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H54B EP - 03 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689592039?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Contrasts+between+deformation+accommodated+by+induced+seismic+and+aseismic+processes+revealed+by+combined+monitoring+of+seismicity+and+surface+deformations%3B+Brady+geothermal+field%2C+Nevada%2C+USA&rft.au=Davatzes%2C+N+C%3BAli%2C+S+T%3BMellors%2C+R+J%3BFoxall%2C+W%3BWang%2C+H+F%3BFeigl%2C+K+L%3BDrakos%2C+P+S%3BZemach%2C+E%3BAnonymous&rft.aulast=Davatzes&rft.aufirst=N&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Structural investigation of SiO2 at the density-temperature conditions relevant to planetary mantles; laser-shock experiments and simulations AN - 1689591864; 2015-056623 AB - With the recent discovery of many exoplanets and super-Earth, modeling the interior of these celestial bodies is becoming a fascinating scientific challenge. In this context, it is crucial to accurately know the equations of state and the physical properties of the constituent materials. Among these, MgSiO3 is of major importance since it can be found in the mantle of earth-like planets or in the inner core of Saturn-like planets. Its behavior, including its dissociation into MgO and SiO2, at high temperatures and pressures drives different scenarios and modeling. We present here a study of the electronic structural properties of fused silica at Mbar pressures using X-ray Absorption Near Edge Spectroscopy (XANES) as a first validation of the dissociation occurring at these extreme conditions for the MgSiO3 complex system. The results were obtained in two different experimental campaigns on the LULI2000 and TITAN lasers at the Ecole Polytechnique and LLNL respectively. With an approach previously tested on aluminum, we obtained high quality XANES data at different well-controlled temperature and density conditions. Coupled to ab-initio calculations, the XANES spectra allowed us to put in evidence direct signature of the gap closure with temperature and the complex structure of the liquid with density that follows the coordinance of the solid phases. The previous bonded liquid picture of silica at planetary conditions is too simple. This work has been supported by the ANR PLANETLAB. JF - American Geophysical Union Fall Meeting AU - Denoeud, Adrien AU - Benuzzi-Mounaix, Alessandra AU - Mazevet, Stephane AU - Ravasio, Alessandra AU - Dorchies, F AU - Leguay, P AU - Gaudin, J AU - Guyot, Francois J AU - Brambrink, Erik AU - Koenig, Michel AU - LePape, S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR23B EP - 2349 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591864?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Structural+investigation+of+SiO2+at+the+density-temperature+conditions+relevant+to+planetary+mantles%3B+laser-shock+experiments+and+simulations&rft.au=Denoeud%2C+Adrien%3BBenuzzi-Mounaix%2C+Alessandra%3BMazevet%2C+Stephane%3BRavasio%2C+Alessandra%3BDorchies%2C+F%3BLeguay%2C+P%3BGaudin%2C+J%3BGuyot%2C+Francois+J%3BBrambrink%2C+Erik%3BKoenig%2C+Michel%3BLePape%2C+S%3BAnonymous&rft.aulast=Denoeud&rft.aufirst=Adrien&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Proppant transport; the key to enhanced well productivity AN - 1689591789; 2015-056597 AB - Current estimated gas recoveries from unconventional gas resources are significantly lower than those of conventional gas reservoirs, with unconventional wells experiencing rapid declines during first years of operation. Thus there is a need to investigate the factors affecting well production. Proppant selection and use has been demonstrated to significantly increases fracture conductivity and potential production rates. However, while an accurate model for proppant transport is essential for any hydraulic fracture simulation and design, there is currently no widely accepted continuum model for proppant transport in fractures. The details necessary to evaluate proppant-pack formation and proppant transport are poorly understood. Direct proppant-scale models allows simulation of proppant pack formation at a scale that resolves all important fluid-proppant interactions directly, shedding light on the fundamental processes underlying proppant transport. In this study, we conduct numerical parametric studies investigating proppant-pack formation and transport to better characterize unconventional hydraulic fracturing strategies. The proppant transport model is based on the distributed Lagrange multiplier technique and both fluid and particles are fully resolved and coupled. The fluid equations are solved through the entire computational domain, however, Lagrange multiplier constraints are applied inside the particle domain such that the fluid within any volume associated with a solid particle moves as an incompressible rigid body. Particle-particle interactions are implemented using explicit force-displacement interactions for frictional inelastic particles similar to the DEM method. We present results from parametric studies of high-resolution particle transport simulations that investigate the proppant transport and pack's formation, as well as evaluate the effect of fluid and proppant properties, pumping rates and proppant concentrations on overall wellbore performance. These studies will help to clarify existing uncertainties in selecting hydraulic fracture strategies, and improve well performance. JF - American Geophysical Union Fall Meeting AU - Kanarska, Y AU - Walsh, S D AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR21B EP - 07 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591789?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Proppant+transport%3B+the+key+to+enhanced+well+productivity&rft.au=Kanarska%2C+Y%3BWalsh%2C+S+D%3BAnonymous&rft.aulast=Kanarska&rft.aufirst=Y&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - X-ray diffraction study of molybdenum to 900 GPa AN - 1689591695; 2015-056630 AB - Molybdenum (Mo) is a transition metal that is important as a high-pressure standard. Its equation of state, structure, and melting behavior have been explored extensively in both experimental and theoretical studies. Melting data up to the Mbar pressure region from static compression experiments in the diamond anvil cell [Errandonea et al. 2004] are inconsistent with shock wave sound velocity measurements [Hixson et al., 1989]. There are also conflicting reports as to whether body-centered cubic (BCC) Mo transforms to a face-centered cubic (FCC), hexagonal close packed (HCP) or double hexagonal close packed (DHCP) structure at either high pressure or high pressure and temperature conditions [Belonoshko et al. 2008, Mikhaylushkin et al., 2008 and Cazorla et al., 2008]. Recently, a phase transition from BCC to the DHCP phase at 660 GPa and 0 K was predicted using the particle swam optimization (PSO) method (Wang et al, 2013). Here we report an x-ray diffraction study of dynamically compressed molybdenum. Experiments were conducted using the Omega laser at the Laboratory for Laser Energetics at the University of Rochester. Mo targets were either ramp or shock compressed using a laser drive. In ramp loading, the sample is compressed sufficiently slowly that a shock wave does not form. This results in lower temperatures, keeping the sample in the solid state to higher pressures. X-ray diffraction measurements were performed using quasi-monochromatic x-rays from a highly ionized He-alpha Cu source and image plate detectors. Upon ramp compression, we found no evidence of phase transition in solid Mo up to 900 GPa. The observed peaks can be assigned to the (110) and (200) or (220) reflections of BCC Mo up to the highest pressure, indicating that Mo does not melt under ramp loading to maximum pressure reached. Under shock loading, we did not observe any evidence for the solid-solid phase transformation around 210 GPa as reported in previous work (Hixson et al., 1989). The BCC phase of Mo remained stable along the Hugoniot up to at least 350 GPa. Our observation of diffraction peaks from shocked Mo shows that Hugoniot does not cross the melting curve until at least this pressure. This indicates that previous diamond cell experiments (Errandonea et al., 2004) have underestimated the Mo melting curve. JF - American Geophysical Union Fall Meeting AU - Wang, Jue AU - Coppari, F AU - Smith, R AU - Eggert, J AU - Boehly, T AU - Collins, G W AU - Duffy, T S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR23B EP - 2356 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591695?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=X-ray+diffraction+study+of+molybdenum+to+900+GPa&rft.au=Wang%2C+Jue%3BCoppari%2C+F%3BSmith%2C+R%3BEggert%2C+J%3BBoehly%2C+T%3BCollins%2C+G+W%3BDuffy%2C+T+S%3BAnonymous&rft.aulast=Wang&rft.aufirst=Jue&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Multi-fluid geothermal energy systems; using CO2 for dispatchable renewable power generation and grid stabilization AN - 1689591575; 2015-056530 AB - We present an approach to use CO2 to (1) generate dispatchable renewable power that can quickly respond to grid fluctuations and be cost-competitive with natural gas, (2) stabilize the grid by efficiently storing large quantities of energy, (3) enable seasonal storage of solar thermal energy for grid integration, (4) produce brine for power-plant cooling, all which (5) increase CO2 value, rendering CO2 capture to be commerically viable, while (6) sequestering huge quantities of CO2. These attributes reduce carbon intensity of electric power, and enable cost-competitive, dispatchable power from major sources of renewable energy: wind, solar, and geothermal. Conventional geothermal power systems circulate brine as the working fluid to extract heat, but the parasitic power load for this circulation can consume a large portion of gross power output. Recently, CO2 has been considered as a working fluid because its advantageous properties reduce this parasitic loss. We expand on this idea by using multiple working fluids: brine, CO2, and N2. N2 can be separated from air at lower cost than captured CO2, it is not corrosive, and it will not react with the formation. N2 also can improve the economics of energy production and enable energy storage, while reducing operational risk. Extracting heat from geothermal reservoirs often requires submersible pumps to lift brine, but these pumps consume much of the generated electricity. In contrast, our approach drives fluid circulation by injecting supplemental, compressible fluids (CO2, and N2) with high coefficients of thermal expansion. These fluids augment reservoir pressure, produce artesian flow at the producers, and reduce the parasitic load. Pressure augmentation is improved by the thermosiphon effect that results from injecting cold/dense CO2 and N2. These fluids are heated to reservoir temperature, greatly expand, and increase the artesian flow of brine and supplemental fluid at the producers. Rather than using pumps, the thermosiphon directly converts reservoir thermal energy into mechanical energy for fluid circulation. Because stored pressure drives fluid production, the response time is faster than that of conventional geothermal power, already considered to be dispatchable. For conventional geothermal, the parasitic power load is in phase with gross power output. In contrast, our approach can time-shift much of the parasitic power load, which is dominated by the power required to separate N2 from air and compress it for injection. Because N2 is readily available, it can be injected intermittently. Thus, most of the parasitic power load can be shifted to coincide with minimum power demand or when there is a surplus of renewable power. Such a time-shift also allows net power output to be nearly equal to gross power output during peak demand. Energy storage can be almost 100 percent efficient because it is achieved by shifting the parasitic load, which is more efficient than other methods used to store energy and stabilize the grid. This work was performed under the auspices of the U.S. DOE by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Buscheck, T A AU - Bielicki, J M AU - Randolph, J AU - Chen, M AU - Hao, Y AU - Sun, Y AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H54B EP - 02 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591575?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Multi-fluid+geothermal+energy+systems%3B+using+CO2+for+dispatchable+renewable+power+generation+and+grid+stabilization&rft.au=Buscheck%2C+T+A%3BBielicki%2C+J+M%3BRandolph%2C+J%3BChen%2C+M%3BHao%2C+Y%3BSun%2C+Y%3BAnonymous&rft.aulast=Buscheck&rft.aufirst=T&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Probing shock compressed silicon metallization using VIS/NIR reflectivity AN - 1689591399; 2015-056641 AB - Broadband reflectivity measurements provide detailed information about the optical and electronic properties of shocked matter, complementing other spectroscopic techniques and increasing the accuracy of pyrometric measurements, which is vital for improving models of planetary cores. A time resolved broadband VIS/NIR reflectivity diagnostic was constructed and used to observe the metallization of shock compressed single crystal silicon phase at Jupiter Laser Facility at Lawrence Livermore National Lab. Silicon is the second most abundant element in the Earth's crust and was considered to be an excellent candidate for initial testing of this diagnostic due to accessible phase changes that should result in dramatic increases in reflectivity. A 50-100 fs 800 nm pulse was first sent through a pulse stacker and then an intense white light pulse with wavelengths from approximately 400 nm to approximately 1200 nm was generated by focusing the stacked pulses into a water cell. The white light pulses were then sent into the chamber and reflected from the target surface. The reflected light was dispersed using a custom spectrometer which was coupled to a streak camera. On transition to the higher pressure phase a dramatic increase in reflectivity was observed in the NIR, and to a lesser extent in the visible. This is congruent with the decrease in resistivity that accompanies closure of the silicon band gap and metallization. JF - American Geophysical Union Fall Meeting AU - Ali, S J AU - Bolme, C AU - Jeanloz, R AU - Collins, G W AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR23B EP - 2367 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591399?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Probing+shock+compressed+silicon+metallization+using+VIS%2FNIR+reflectivity&rft.au=Ali%2C+S+J%3BBolme%2C+C%3BJeanloz%2C+R%3BCollins%2C+G+W%3BAnonymous&rft.aulast=Ali&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Equation of state of planetary ices from first-principles AN - 1689591190; 2015-056618 AB - A large fraction of the transiting exoplanets observed are similar in mass and radii to the Ice Giants in our Solar System. The structure of such planets is heavily dependent on the equation-of-state properties of mixtures of water, ammonia and methane (referred to as "planetary ices") at high pressures and temperatures. Many observable properties of Uranus and Neptune, such as gravitational moments and magnetic fields, are thought to be determined by the physical and chemical properties of matter within this ice layer. Of particular interest is the impact of the complex organic chemistry on the fluid properties at these extreme conditions. To cover the wide range of pressure and temperatures relevant to the description of these planets, different approaches are used to generate the EOS data. One of these approaches is quantum molecular dynamics, which we use to address the high-temperature high-pressure part of the EOS. Here we report our QMD results for the structure, composition and properties of the high-pressure planetary ices. In particular we address mixing rules for these ices mixture in the fluid phase and solid high-pressure phases for water-ammonia mixtures. As well as producing usable EOS in their own right, QMD can validate chemical models calculations, which are based on assumed functional forms for thermodynamic potentials. Where valid, these calculations can be performed much faster than QMD and cover a much larger number of concentrations. We report on the comparison of QMD results and such chemical models for water-methane and water-ammonia mixtures. Finally, we use these EOS to predict astrophysical mass-radius relations. JF - American Geophysical Union Fall Meeting AU - Hamel, S AU - Bethkenhagen, Mandy AU - Swift, D AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR23B EP - 2344 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591190?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Equation+of+state+of+planetary+ices+from+first-principles&rft.au=Hamel%2C+S%3BBethkenhagen%2C+Mandy%3BSwift%2C+D%3BAnonymous&rft.aulast=Hamel&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Modeling of anisotropic rock joints under cyclic loading AN - 1689591100; 2015-056646 AB - This work describes a constitutive framework for modeling the behavior of rough joints under cyclic loading. Particular attention is paid to the intrinsic links between dilatancy, surface degradation, and mobilized shear strength. The framework also accounts for the important effect of shear-induced anisotropy. Both the governing formulation and an algorithm for implicit numerical integration are presented. While the proposed methods are general, we also postulate a specific model that is compared with experimental data. It employs relatively few free parameters, but shows good agreement with laboratory tests. JF - American Geophysical Union Fall Meeting AU - White, J A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR23C EP - 05 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591100?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+of+anisotropic+rock+joints+under+cyclic+loading&rft.au=White%2C+J+A%3BAnonymous&rft.aulast=White&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - EOS & thermodynamics of warm dense silica (SiO2) using laser-driven shock compression of stishovite AN - 1689589693; 2015-056629 AB - Laboratory experiments with laser-driven shocks provide access to explore new regimes of warm dense matter. Due to its high starting density (4.3g/cc), the Hugoniot of Stishovite explores a much denser and cooler path than alpha -quartz (rho 0=2.65 g/cc) and fuse Silica (rho 0=2.2 g/cc) Hugoniot curves. Stishovite polycrystalline samples and single crystals were synthesized at high pressure-temperature conditions using large-volume-press techniques. The samples were characterized by powder or single-crystal X-ray diffraction, Raman spectroscopy, scanning electron microscopy and wavelength-dispersive X-ray spectroscopy. Their phase and chemical purity was confirmed by appropriate analytical methods. Stishovite poly- and single crystals were shock compressed with direct-drive laser-compression at the Omega Laser Facility in Rochester, NY. We used interferometric Doppler interferometry (VISAR) and streaked optical pyrometry (SOP) with an alpha -quartz reference. We will discuss optical reflectivity and equation of state (pressure, density, temperature) measurements on warm dense Silica up to approximately 15 Mbar and 50 000K, compare them with similar measurements on other Silica polymorphs, and explore the consequences for large impact and planetary evolution modeling. In particular, we will show how our data provide a measurement of the melting temperature of SiO2 along the Stishovite Hugoniot, i.e according to a preliminary analysis near 5 Mbar and 8500 K. JF - American Geophysical Union Fall Meeting AU - Millot, M A AU - Eggert, J AU - Dubrovinskaia, Natalia AU - Cernok, Ana AU - Blaha, Stephan AU - Dubrovinsky, Leonid S AU - Hamel, S AU - Collins, G W AU - Jeanloz, R AU - Celliers, P M AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR23B EP - 2355 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689589693?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=EOS+%26amp%3B+thermodynamics+of+warm+dense+silica+%28SiO2%29+using+laser-driven+shock+compression+of+stishovite&rft.au=Millot%2C+M+A%3BEggert%2C+J%3BDubrovinskaia%2C+Natalia%3BCernok%2C+Ana%3BBlaha%2C+Stephan%3BDubrovinsky%2C+Leonid+S%3BHamel%2C+S%3BCollins%2C+G+W%3BJeanloz%2C+R%3BCelliers%2C+P+M%3BAnonymous&rft.aulast=Millot&rft.aufirst=M&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Refining age estimates for three historic ground rupturing earthquakes in the Santa Cruz Mountains; (super 14) C wiggle-matching and non-native pollen as age indicators (or not!) AN - 1686059462; 2015-050911 AB - The Hazel Dell site provides the first definitive paleoseismic evidence of two pre-1906 19th century events on the Santa Cruz Mountains section based on the presence of anthropogenic artifacts. Hundreds of pieces of cut redwood chips were found in a stratigraphic horizon just below the ante-penultimate (E3) earthquake surface, suggesting that redwood trees at the site were cut down right before earthquake E3. We correlate our paleoseismic findings with the historic record and the onset of redwood logging in the area by determining the felling date of a buried redwood tree stump at the site and the age of the woodchips. We wiggle match 14 radiocarbon dates sampled from annual growth rings taken from the stump and the known interval between growth rings, with the intercepts of the INTCAL04 terrestrial (super 14) C calibration curve. Pending (super 13) C measurements, we find that the youngest ring we have identified in the tree is A.D. 1800. We also wiggle match 2 radiocarbon dates from inner and outer growth rings from two wood chips (with bark); their ages are consistent with the tree and the youngest woodchip ring is dated to 1813 A.D. There are no known ethnographic or historical accounts of pre-contact native people felling large trees in the way that European colonists did. The first record of European land use was for pasture in 1803. The property became a Spanish land grant in 1827, soon after which a whip-saw lumber mill is documented to have begun operation in the upper Corralitos area. We combine these paleoseismic results with historical earthquake accounts for the area and conclude that the San Andreas fault ruptured in 1838, 1890 and 1906. The Hazel Dell results are in contrast with findings from earlier paleoseismic studies in the Santa Cruz Mountains. The Grizzly Flat site, 6 km to the north, found evidence of 1906 and one 17th century earthquake. Two historic earthquakes were observed at the Mill Canyon site 8 km to the south and at the Arano Flat site 9.5 km south of the Hazel Dell. The Arano Flat and Mill Canyon studies, however, used the lack of non-native pollen, from invasive species introduced by the early Spanish, in near-surface stratigraphy to trim probability distribution functions for both the ages of deposits and the timing of earthquakes. At Hazel Dell we have found that historic sediments lack non-native pollen commonly associated with Spanish cattle migration. So, while the presence of non-native pollen can limit the age of a deposit, the lack of pollen does not require the deposit to occur in the period prior to Spanish settlement, and this age constraint used at Arano Flat and Mill Canyon is invalid. We correlate earthquakes between Hazel Dell and nearby paleoseismic sites based on revised timing, similarity of stratigraphy and style and size of displacement, and build a composite paleoseismic record for the Santa Cruz Mountains that includes a 1906, 1890, 1838. In the 700 years before 1800 the 4 sites have evidence ranging from 1-5 events, suggesting that a complete record has yet to be worked out. JF - American Geophysical Union Fall Meeting AU - Streig, A R AU - Weldon, R J AU - Dawson, T E AU - Guilderson, T AU - Gavin, D G AU - Reidy, L AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract T23C EP - 2594 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686059462?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Refining+age+estimates+for+three+historic+ground+rupturing+earthquakes+in+the+Santa+Cruz+Mountains%3B+%28super+14%29+C+wiggle-matching+and+non-native+pollen+as+age+indicators+%28or+not%21%29&rft.au=Streig%2C+A+R%3BWeldon%2C+R+J%3BDawson%2C+T+E%3BGuilderson%2C+T%3BGavin%2C+D+G%3BReidy%2C+L%3BAnonymous&rft.aulast=Streig&rft.aufirst=A&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Bringing new tools and techniques to bear on earthquake hazard analysis and mitigation AN - 1686059119; 2015-050546 AB - During July 2013, IRIS held an Advanced Studies Institute in Santo Domingo, Dominican Republic, that was designed to enable early-career scientists who already have mastered the fundamentals of seismology to begin collaborating in frontier seismological research. The Institute was conceived of at a strategic planning workshop in Heredia, Costa Rica, that was supported and partially funded by USAID, with a goal of building geophysical capacity to mitigate the effects of future earthquakes. To address this broad goal, we drew participants from a dozen different countries of Middle America. Our objectives were to develop understanding of the principles of earthquake hazard analysis, particularly site characterization techniques, and to facilitate future research collaborations. The Institute was divided into three main sections: overviews on the fundamentals of earthquake hazard analysis and lectures on the theory behind methods of site characterization; fieldwork where participants acquired new data of the types typically used in site characterization; and computer-based analysis projects in which participants applied their newly-learned techniques to the data they collected. This was the first IRIS institute to combine an instructional short course with field work for data acquisition. Participants broke into small teams to acquire data, analyze it on their own computers, and then make presentations to the assembled group describing their techniques and results.Using broadband three-component seismometers, the teams acquired data for Spatial Auto-Correlation (SPAC) analysis at seven array locations, and Horizontal to Vertical Spectral Ratio (HVSR) analysis at 60 individual sites along six profiles throughout Santo Domingo. Using a 24-channel geophone string, the teams acquired data for Refraction Microtremor (SeisOpt (super (R)) ReMi (super (TM)) from Optim) analysis at 11 sites, with supplementary data for active-source Multi-channel Spectral Analysis of Surface Waves (MASW) analysis at five of them. The results showed that teams quickly learned to collect high-quality data for each method of analysis. SPAC and refraction microtremor analysis each demonstrated that dispersion relations based on ambient noise and from arrays with an aperture of less than 200 meters could be used to determine the depth of a weak, disaggregated layer known to underlie the fast near-surface limestone terraces on which Santo Domingo is situated, and indicated the presence of unexpectedly strong rocks below. All three array methods concurred that most Santo Domingo sites has relatively high VS30 (average shear velocity to a depth of 30 m), generally at the B-C NEHRP hazard class boundary or higher. HVSR analysis revealed that the general pattern of resonance was short periods close to the coast, and an increase with distance from the shore line. In the east-west direction, significant variations were also evident at the highest elevation terrace, and near the Ozama River. In terms of the sub-soil conditions, the observed pattern of HVSR values, departs form the expected increase of sediments thickness close to the coast. JF - American Geophysical Union Fall Meeting AU - Willemann, R J AU - Pulliam, J AU - Polanco, E AU - Louie, J N AU - Huerta-Lopez, C AU - Schmitz, M AU - Moschetti, M P AU - Huerfano Moreno, V AU - Pasyanos, M AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract ED43C EP - 0782 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686059119?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Bringing+new+tools+and+techniques+to+bear+on+earthquake+hazard+analysis+and+mitigation&rft.au=Willemann%2C+R+J%3BPulliam%2C+J%3BPolanco%2C+E%3BLouie%2C+J+N%3BHuerta-Lopez%2C+C%3BSchmitz%2C+M%3BMoschetti%2C+M+P%3BHuerfano+Moreno%2C+V%3BPasyanos%2C+M%3BAnonymous&rft.aulast=Willemann&rft.aufirst=R&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geomechanical reservoir response to CO (sub 2) injection at Snohvit, Norway AN - 1686056525; 2015-046408 AB - Pressure build-up during a large-scale CO2 injection increases the potential for seal failure, fault reactivation, leakage and induced microseismicity. Careful geomechanical analysis is necessary to predict and potentially manage these effects. In the present work we investigate the geomechanical reservoir response to the CO2 injection in the Tubaen Fm at the Snohvit site taking into account the potential compartmentalization of the storage reservoir and the in situ stress uncertainty. Compartmentalization has been suspected due to the unexpected pressure rise during operations in the storage reservoir, which led to a considerable decrease in the estimated total capacity and to the abandonment of injection operations in the Tubaen Fm. The high uncertainty in the in situ stress field makes predictions difficult, and therefore uncertainty quantification analysis is a vital component of this work. The Snohvit gas field is located offshore in the northern Norwegian Sea (Barents Sea). CO2 is injected in the Tubaen Fm. at approximately 2600 m depth. The Tubaen Fm. corresponds to a delta plain environment dominated by fluvial distributary channels which potentially contribute to the suspected compartmentalization. Structurally the area is extensively faulted, with a dominant east-west-trending fault system, and other faults at high angles to this trend, leading to complex fault interactions. This makes fault compartmentalization a strong possibility as well. Given the injection pressure history, geometry of major faults, available estimates of the in situ stress tensor, and reservoir characteristics, we investigate the geomechanical response of the system to the CO2 injection, focusing in particular on addressing the potential reservoir compartmentalization and its impacts on injection performance, CO2 distribution and migration outside of the storage interval. JF - American Geophysical Union Fall Meeting AU - Chiaramonte, L AU - White, J A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H21L EP - 07 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686056525?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geomechanical+reservoir+response+to+CO+%28sub+2%29+injection+at+Snohvit%2C+Norway&rft.au=Chiaramonte%2C+L%3BWhite%2C+J+A%3BAnonymous&rft.aulast=Chiaramonte&rft.aufirst=L&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-06-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Uncertainty quantification and risk mitigation of CO2 leakage in groundwater aquifers AN - 1680757187; 2015-043286 AB - The risk of CO2 leakage into shallow aquifers through various pathways such as faults and abandoned wells is a concern of CO2 geological sequestration. If a leak is detected in an aquifer system, a contingency plan is required to manage the CO2 storage and to protect the groundwater source. Among many remediation and mitigation strategies, the simplest is to stop CO2 leakage at a wellbore. Therefore, it is necessary to address whether and when the CO2 leaks should be sealed, and how much risk can be mitigated. In the presence of various uncertainties, including geological-structure uncertainty and parametric uncertainty, the risk of CO2 leakage into an aquifer needs to be assessed with probabilistic distributions of uncertain parameters. In this study, we developed an integrated model to simulate multiphase flow of CO2 and brine in a deep storage reservoir, through a leaky well at an uncertain location, and subsequently multicomponent reactive transport in a shallow aquifer. Each sub-model covers its domain-specific physics. Uncertainties of geological structure and parameters are considered together with decision variables (CO2 injection rate and mitigation time) for risk assessment of leakage-impacted aquifer volume. High-resolution and less-expensive reduced-order models (ROMs) of risk profiles are approximated as polynomial functions of decision variables and all uncertain parameters. These reduced-order models are then used in the place of computationally-expensive numerical models for future decision-making on if and when the leaky well is sealed. The tradeoff between CO2 storage capacity in the reservoir and the leakage-induced risk in the aquifer is evaluated. JF - American Geophysical Union Fall Meeting AU - Sun, Y AU - Tong, C AU - Mansoor, K AU - Carroll, S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H11M EP - 05 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680757187?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Uncertainty+quantification+and+risk+mitigation+of+CO2+leakage+in+groundwater+aquifers&rft.au=Sun%2C+Y%3BTong%2C+C%3BMansoor%2C+K%3BCarroll%2C+S%3BAnonymous&rft.aulast=Sun&rft.aufirst=Y&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - InSAR measurements and numerical models of deformation at Brady Hot Springs geothermal field (Nevada), 1995-2012 AN - 1680756024; 2015-043108 AB - We study deformation due to changes in fluid pressure caused by pumping during production, injection, and stimulation at the Brady Hot Springs geothermal field in the Basin and Range province in Nevada. To measure the deformation, we analyze Interferometric Synthetic Aperture Radar (InSAR) data acquired by the ERS-1, ERS-2, Envisat, and TerraSAR-X satellites between 1995 and 2013. The InSAR results indicate subsidence at the order of several centimeters per year over an elliptically shaped area roughly approximately 5 km long by approximately 2 km wide. Its long axis follows the NNE strike of the predominant normal fault system. The subsiding area is centered near a prominent bend in the fault system where the successful production wells are located. Within this broad bowl of subsidence, the interference pattern shows several smaller features with length scales of the order of approximately 1 km. To explain the deformation signal, we use poroelastic models constrained by borehole measurements of pressure, temperature and mass flux, as well as geologic observations. We solve the coupled deformation-diffusion problem using the finite element method. To estimate parameters in the model, e.g., permeability, we use the General Inversion for Phase Technique -- GIPhT [Feigl and Thurber, 2009; Ali and Feigl, 2012] that utilizes the gradient of range change and avoids the need for unwrapping the observed wrapped phase. We then solve the non-linear inverse problem using a gradient-based inversion scheme. Our results suggest that a complex network of high permeability conduits associated with intersections between fault segments and bends in fault segments explains the smaller length-scale features observed in the interferograms. Such structurally controlled, high permeability conduits are consistent with relatively recent fault slip evidenced by scarps in late Pleistocene Lake Lahontan sediments and spatially associated surface hydrothermal features that predate production at Brady. In contrast, Desert Peak, a "blind" geothermal field, located less than 7 km away from Brady, shows little or no deformation in the InSAR data set, although the two fields are otherwise similar in spatial extent, structural setting, and geothermal production. Desert Peak exhibits neither hydrothermal features nor any evidence of surficial fault slip, however, suggesting that the "plumbing" associated with the fault system there is deeper at than at Brady. JF - American Geophysical Union Fall Meeting AU - Ali, S T AU - Davatzes, N C AU - Mellors, R J AU - Foxall, William AU - Drakos, P S AU - Zemach, E AU - Kreemer, C AU - Wang, H F AU - Feigl, K L AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract G33D EP - 05 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680756024?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=InSAR+measurements+and+numerical+models+of+deformation+at+Brady+Hot+Springs+geothermal+field+%28Nevada%29%2C+1995-2012&rft.au=Ali%2C+S+T%3BDavatzes%2C+N+C%3BMellors%2C+R+J%3BFoxall%2C+William%3BDrakos%2C+P+S%3BZemach%2C+E%3BKreemer%2C+C%3BWang%2C+H+F%3BFeigl%2C+K+L%3BAnonymous&rft.aulast=Ali&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Assessing risk due to injection-induced seismicity prior to operation AN - 1680755796; 2015-043282 AB - Probabilistic Seismic Hazard Analysis (PSHA) has been used successfully over a number of years to evaluate the risk due to natural seismic hazards. However, there are key differences between anthropogenic seismicity due to injection (induced seismicity, IS) and natural seismicity that limit the usefulness of such an approach directly. Furthermore, because this approach must be generally suitable prior to injection, it can be assumed that there will be little to no natural, site-specific seismicity record. Here we address two significant deviations from traditional PSHA, the non-Poissonian nature of induced seismicity and the form of the frequency-magnitude relation for long-term, site-specific seismicity, through the use of a physics-based, numerical approach to estimating earthquake frequency-magnitude distributions. Induced earthquake sequences are generated using RSQSIM (Dieterich and Richards-Dinger, PAGEOPH, 2010) augmented to include effective stress effects on the shear failure behavior of faults and fractures embedded in a 3D geological structure under steady-state tectonic shear loading. The spatially and temporally evolving pore pressure distribution is provided as a boundary condition and calculated via a multi-phase flow simulation in NUFT (Nitao, 2001). Hazard and risk are assessed via an adaptation of SIMRISK (Savy Risk Consultants), amended to consider frequency-magnitude relations that may deviate from a truncated exponential form. In addition to potentially damaging ground motions, induced seismicity poses a risk of perceived nuisance in nearby communities caused by small felt earthquakes, which occur relatively frequently. Including these shallow local earthquakes in the hazard analysis requires extending the magnitude range considered to as low as M2 and the frequency band to include the short-duration pulses that typically characterize these events. To calculate the hazard, one-dimensional empirical ground motion prediction equations (eGMPE) are currently used; however, these are poorly constrained at the short distances and smaller magnitudes needed to estimate both nuisance and damage risks from nearby earthquakes. We will describe how we are addressing this issue by calculating site-specific ground motions that use synthetic Green's functions derived from the local shallow velocity and attenuation structures for lower frequencies and a stochastic method or available empirical Greens functions for higher frequencies. Finally, we will demonstrate this approach through an application to a CO2 sequestration site and discuss how such an approach fits into a broader risk assessment methodology supported by the National Risk Assessment Partnership (NRAP) for addressing CO2 sequestration site evaluations. JF - American Geophysical Union Fall Meeting AU - Johnson, S AU - Foxall, William AU - Hutchings, L J AU - Savy, Jean B AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H11M EP - 01 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680755796?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Assessing+risk+due+to+injection-induced+seismicity+prior+to+operation&rft.au=Johnson%2C+S%3BFoxall%2C+William%3BHutchings%2C+L+J%3BSavy%2C+Jean+B%3BAnonymous&rft.aulast=Johnson&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Novel S-35 intrinsic tracer method for determining groundwater travel time near managed aquifer recharge facilities AN - 1680755678; 2015-043242 AB - Identifying groundwater travel times near managed aquifer recharge (MAR) facilities is a high priority for protecting public and environmental health. For MAR facilities in California that incorporate tertiary wastewater into their surface-spreading recharge practices, the target subsurface residence time is >9 months to allow for the natural inactivation and degradation of potential contaminants (less time is needed for full advanced treated water). Established intrinsic groundwater tracer techniques such as tritium/helium-3 dating are unable to resolve timescales of <1 year. These limitations provide the motivation for evaluating a novel groundwater tracer method using a naturally occurring radioisotope of sulfur, sulfur-35 (S-35). After its production in the atmosphere by cosmic ray interaction with argon, S-35 enters the hydrologic cycle as dissolved sulfate through precipitation The short half-life of S-35 (3 months) is ideal for investigating recharge and transport of MAR groundwater on the <1 year timescale of interest to MAR managers. The method, however, has not been applied to MAR operations because of the difficulty in measuring S-35 with sufficient sensitivity in high-sulfate waters. We have developed a new method and have applied it at two southern California MAR facilities where groundwater travel times have previously been characterized using deliberate tracers: 1) Rio Hondo Spreading Grounds in Los Angeles County, and 2) Orange County Groundwater Recharge Facilities in Orange County. Reasonable S-35 travel times of <1 year were identified at both study sites. This method also identified seasonal patterns in subsurface travel times, which may not be revealed by a deliberate tracer study that is dependent on the hydrologic conditions during the tracer injection period. JF - American Geophysical Union Fall Meeting AU - Uriostegui, Stephanie H AU - Bibby, R K AU - Esser, B K AU - Clark, J F AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H11F EP - 1218 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680755678?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Novel+S-35+intrinsic+tracer+method+for+determining+groundwater+travel+time+near+managed+aquifer+recharge+facilities&rft.au=Uriostegui%2C+Stephanie+H%3BBibby%2C+R+K%3BEsser%2C+B+K%3BClark%2C+J+F%3BAnonymous&rft.aulast=Uriostegui&rft.aufirst=Stephanie&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Linking the geological record for large igneous provinces and hotspots with tomography-based numerical models of thermal convection in the Earth's mantle AN - 1680752607; 2015-040633 AB - Current tomographic imaging of the 3-D structure in Earth's interior reveals several large-scale anomalies of strongly reduced seismic velocity in the deep lower mantle, in particular beneath the Perm region in Western Siberia, the East Pacific Rise, the West Pacific (Caroline Islands), the Southwest Indian Ocean, as well as under Western and Southern Africa. We have carried out mantle dynamic simulations (Glisovic et al., GJI 2012) of the evolution of these large-scale structures that directly incorporate robust constraints provided by joint seismic-geodynamic inversions of mantle density structure with further constraints provided by mineral physics data (Simmons et al., GJI 2009, JGR 2010). These tomography-based convection simulations also incorporate constraints on mantle viscosity inferred by inversion of a suite of convection-related and glacial isostatic adjustment data sets (Mitrovica & Forte, EPSL 2004) and are characterized by Earth-like Rayleigh numbers. The convection simulations provide a detailed insight into the very-long-time evolution of the buoyancy of these lower-mantle anomalies. We find, in particular, that the buoyancy associated with the 'Perm Anomaly' generates a very long-lived hot upwelling or 'superplume' that is connected to the paleomagnetic location of the Siberian Traps (Smirnov & Tarduno, EPSL 2010) and also to location of North Atlantic Igneous Provinces (i.e., the opening of North Atlantic Ocean). These convection simulations (both backwards and forwards in time) also reveal stable and long-lived plume-like upwellings under the East Pacific Rise, as previously identified by Rowley et al. (AGU 2011, Nature - in review), in particular beneath the Easter & Pitcairn hotspots. Finally we also provide detailed reconstructions of the 65 Myr evolution of the 'Reunion plume' that gave rise to the Deccan Traps. JF - American Geophysical Union Fall Meeting AU - Glisovic, P AU - Forte, A M AU - Rowley, D B AU - Simmons, N A AU - Grand, S P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract DI13A EP - 05 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680752607?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+the+geological+record+for+large+igneous+provinces+and+hotspots+with+tomography-based+numerical+models+of+thermal+convection+in+the+Earth%27s+mantle&rft.au=Glisovic%2C+P%3BForte%2C+A+M%3BRowley%2C+D+B%3BSimmons%2C+N+A%3BGrand%2C+S+P%3BAnonymous&rft.aulast=Glisovic&rft.aufirst=P&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Comparing ice margin response to early Holocene warmth, Disko Bugt region, west Greenland AN - 1668231022; 2015-027596 AB - The response of the Greenland ice sheet (GrIS) margin to climate change is spatially variable. Understanding the mechanisms that control ice margin variability is important for future predictions of changes in the mass balance and configuration of the GrIS. One factor that appears to play a role in driving varying response of the GrIS is the setting in which the ice margin terminates. We hypothesize that marine terminating glaciers react to changing climate faster than their land-based counterparts. We believe this disparity is due at least in part to differences surface velocities. Marine terminating glaciers in west Greenland have velocities one to two orders higher than that of land based glaciers, as well as additional heat transport to the glacier's terminus via ocean currents. Here we present a 10Be chronology of Holocene deglaciation for two outlet glacier systems, one primarily land-base (Nordenskiold Gletscher) and one marine terminating (Torrssukatak Fjord; an extension of NE Disko Bugt), in central west Greenland. To test our hypothesis we compare the timing and rate of retreat of the two systems during the ameliorating climate of the early Holocene. Transects of 10Be ages at each site, extending eastward from the ice margin, detail the timing and rate of retreat during the early Holocene. Our 10Be chronology indicates that Disko Bugt deglaciation began at 10.8+ or -0.5 ka. Deglaciation continued northeast to Torrssukatak Fjord, with ice receding from the western mouth of the fjord at 10.9+ or -0.5 ka. A moraine at the eastern end of the fjord, approximately 500 m west of the present ice margin, is evidence of a pause or re-advanced of the GrIS during early Holocene deglaciation. 10Be ages bracketing the moraine indicated that the moraine was formed between 9.5+ or -0.4 and 8.6+ or -0.8 ka. The Torrssukatak Fjord deglacial chronology is supported by radiocarbon evidence, which suggests ice had receded within approximately 5 km of the present location by 8,600+ or -100 cal yr BP. Results from the nearly 100 km-wide swath of land between the Baffin Bay and Nodenskiold Gletscher are pending at the time of this abstract submission. The combined 10Be and radiocarbon chronology will allow for comparison of the two glaciers systems during retreat in the early Holocene. This comparison will provide insight into the mechanisms that control glacier fluctuations, as well as provide constraints on the reaction of the GrIS to warming climate for a time period prior to the historical record. JF - American Geophysical Union Fall Meeting AU - Kelley, S E AU - Briner, J P AU - Cronauer, S L AU - Zimmerman, S R AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract C33A EP - 0655 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668231022?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Comparing+ice+margin+response+to+early+Holocene+warmth%2C+Disko+Bugt+region%2C+west+Greenland&rft.au=Kelley%2C+S+E%3BBriner%2C+J+P%3BCronauer%2C+S+L%3BZimmerman%2C+S+R%3BAnonymous&rft.aulast=Kelley&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-04-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - (super 10) Be chronology of the Drygalski Moraines, central western Greenland AN - 1668230640; 2015-027594 AB - Ice sheet margin fluctuations throughout the Holocene are increasingly well documented in Greenland, but fundamental gaps still exist. The Drygalski Moraines on the Nuussuaq Peninsula, central western Greenland, represent one of the few locations on Greenland where potential early Neoglacial ( approximately 2-5 ka) moraines have been identified. We used cosmogenic 10Be exposure dating of moraine boulders to test the hypothesis that the Drygalski Moraines are early Neoglacial in age, as was previously estimated using cross-cutting relationships with relative sea level. Alternative hypotheses are that the Drygalski Moraines represent the northern extent of the Orkendalen Moraine (6.8 + or - 0.3 ka) or the Fjord Stade Moraines ( approximately 9.3 and approximately 8.2 ka). Results from 10Be dating of perched erratics outboard of the Drygalski Moraines suggest that deglaciation of the area occurred between approximately 10.4 + or - 0.3 ka and 9.5 + or - 0.3 ka. We dated three different crests of the Drygalski Moraine complex, which have mean ages of 8.6 + or - 0.4 ka (n=2), 8.5 + or - 0.2 ka (n=3), and 7.6 + or - 0.1 ka (n=2) from outer to inner. Perched erratics between the younger two moraines average 7.8+ or -0.1 ka (n=2) and are consistent with the nearby moraine ages. These results allow us to reject the early Neoglacial and Orkendalen hypotheses and generally support the Fjord Stade Moraine hypothesis because the Drygalski and Fjord Stade moraines are both early Holocene in age. However, we propose that the Drygalski and Fjord Stade moraines represent a different ice sheet response to early Holocene climate history. This may be attributed to the fast-flowing, marine-terminating nature of Jakobshavn Isbrae (the outlet glacier that deposited the Fjord Stade Moraines) in contrast with the land-based and slower-flowing lobe that deposited the Drygalski Moraines. Evidence suggests that Jakobshavn Isbrae is extremely sensitive to changes in climate, even on the centennial to decadal scale. As a result, Jakobshavn Isbrae may create discrete moraines in response to short-lived climate events (i.e. the 9.3 and 8.2 ka climate events). In contrast, the Drygalski Moraines may archive the centennial- to millennial-scale climate variability during the early Holocene and do not seem to be associated with specific early Holocene climate events. JF - American Geophysical Union Fall Meeting AU - Cronauer, S L AU - Briner, J P AU - Kelley, S E AU - Zimmerman, S R AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract C33A EP - 0653 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668230640?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=%28super+10%29+Be+chronology+of+the+Drygalski+Moraines%2C+central+western+Greenland&rft.au=Cronauer%2C+S+L%3BBriner%2C+J+P%3BKelley%2C+S+E%3BZimmerman%2C+S+R%3BAnonymous&rft.aulast=Cronauer&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-04-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Linking SPE body-wave amplitudes and site characterization AN - 1664436121; 2015-023160 AB - The purpose of the Source Physics Experiments is to investigate the generation and propagation of seismic waves from buried underground chemical explosions. Here we present results from an analysis of the tests up to date with emphasis on implications for discrimination and yield estimation using seismic data at very local (<20 km) distances. For example, previous work indicates that local (< 100 km) distance recordings of the SPE series do not appear to discriminate well using P/S ratios at some stations. We attempt to correlate variations in body wave amplitudes as a function of azimuth observed at very local ranges (< 20 km) with differences in 1) site effects; 2) path effects; 3) path topography; and 4) near-source (< 200 m) effects using both observations and modeling as a guide. Possible path effects are evaluated using a combination of existing geologic models combined with seismic velocity/attenuation models constructed using ambient noise tomography. Modeling is conducted with a finite-difference code capable of handling topographic effects. Near-source effects will rely on measurements of near-source geology, velocity models, and near-field observations (including spall) with focus on azimuthal variations. JF - American Geophysical Union Fall Meeting AU - Mellors, R J AU - Walter, W R AU - Ford, S R AU - Pitarka, A AU - Wagoner, J L AU - Matzel, E AU - Hauk, T F AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2427 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664436121?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+SPE+body-wave+amplitudes+and+site+characterization&rft.au=Mellors%2C+R+J%3BWalter%2C+W+R%3BFord%2C+S+R%3BPitarka%2C+A%3BWagoner%2C+J+L%3BMatzel%2C+E%3BHauk%2C+T+F%3BAnonymous&rft.aulast=Mellors&rft.aufirst=R&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Fundamental vibration frequency and damping estimation; a comparison using the random decrement method, the empirical mode decomposition, and the HV spectral ratio method for local site characterization AN - 1664435477; 2015-025325 AB - Site characterization in civil engineering demands to know at least two of the dynamic properties of soil systems, which are: (i) dominant vibration frequency, and (ii) damping. As part of an effort to develop understanding of the principles of earthquake hazard analysis, particularly site characterization techniques using non invasive/non destructive seismic methods, a workshop (Pan-American Advanced Studies Institute: New Frontiers in Geophysical Research: Bringing New Tools and Techniques to Bear on Earthquake Hazard Analysis and Mitigation) was conducted during july 15-25, 2013 in Santo Domingo, Dominican Republic by the alliance of Pan-American Advanced Studies Institute (PASI) and Incorporated Research Institutions for Seismology (IRIS), jointly supported by Department of Energy (DOE) and National Science Foundation (NSF). Preliminary results of the site characterization in terms of fundamental vibration frequency and damping are here presented from data collected during the workshop. Three different methods were used in such estimations and later compared in order to identify the stability of estimations as well as the advantage or disadvantage among these methodologies. The used methods were the: (i) Random Decrement Method (RDM), to estimate fundamental vibration frequency and damping simultaneously; (ii) Empirical Mode Decomposition (EMD), to estimate the vibration modes, and (iii) Horizontal to Vertical Spectra ratio (HVSR), to estimate the fundamental vibration frequency. In all cases ambient vibration and induced vibration were used. JF - American Geophysical Union Fall Meeting AU - Huerta-Lopez, Carlos I AU - Upegui Botero, Fabio M AU - Pulliam, Jay AU - Willemann, Ray J AU - Pasyanos, M AU - Schmitz, M AU - Rojas Mercedes, N AU - Louie, J N AU - Moschetti, M P AU - Martinez-Cruzado, Jose A AU - Suarez, Luis AU - Huerfano Moreno, Victor AU - Polanco, Eugenio AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S53B EP - 2416 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664435477?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Fundamental+vibration+frequency+and+damping+estimation%3B+a+comparison+using+the+random+decrement+method%2C+the+empirical+mode+decomposition%2C+and+the+HV+spectral+ratio+method+for+local+site+characterization&rft.au=Huerta-Lopez%2C+Carlos+I%3BUpegui+Botero%2C+Fabio+M%3BPulliam%2C+Jay%3BWillemann%2C+Ray+J%3BPasyanos%2C+M%3BSchmitz%2C+M%3BRojas+Mercedes%2C+N%3BLouie%2C+J+N%3BMoschetti%2C+M+P%3BMartinez-Cruzado%2C+Jose+A%3BSuarez%2C+Luis%3BHuerfano+Moreno%2C+Victor%3BPolanco%2C+Eugenio%3BAnonymous&rft.aulast=Huerta-Lopez&rft.aufirst=Carlos&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Long-period ground motion in the Arabian Gulf from earthquakes in the Zagros Mountains thrust belt AN - 1664435462; 2015-025337 AB - We will compare observed and modeled ground motions recorded in the western shore of the Arabian Gulf from selected earthquakes in the Zagros Mountains region. Exceptionally long-duration seismic waves with very large amplitude, as compared with ground motion prediction equations developed by Campbell and Bozorgnia (2008) and Boore and Atkinson (2006), are found to occur with periods of 2-10 seconds. These long-period waves may have implications for large structures near the Gulf and therefore it is important to understand the cause. In contrast, the short-period content of ground motion (<2s) at long distances is relatively weak. The long-period waves may be due to waveguide effects in the deep sedimentary basin structure of the Arabian Gulf. Therefore, we performed 3D wave propagation simulations using a finite difference method. Several different velocity models of the Gulf, were tested. The simulation results confirm our hypothesis that long period waves with extremely long duration and relatively large amplitudes are caused by the geometry of the basin sedimentary layers. The depth of the earthquakes is also a factor. Combined effects of basin edge geometry with sharp velocity contrast and shallow sources (< 10km) on the east part of the Arabian Gulf can cause large long period ground motion on the west part of the Gulf. The reduced amplitude of the short-period waves is due to wave propagation scattering and attenuation in the shallow sedimentary layers of the Gulf basin. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Pitarka, Arben AU - Al-Amri, A M AU - Rodgers, A J AU - Pasyanos, M AU - Mellors, R J AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S53B EP - 2428 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664435462?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Long-period+ground+motion+in+the+Arabian+Gulf+from+earthquakes+in+the+Zagros+Mountains+thrust+belt&rft.au=Pitarka%2C+Arben%3BAl-Amri%2C+A+M%3BRodgers%2C+A+J%3BPasyanos%2C+M%3BMellors%2C+R+J%3BAnonymous&rft.aulast=Pitarka&rft.aufirst=Arben&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - P- and S-wave imaging of cavity collapse at the site of an underground nuclear test AN - 1664434791; 2015-023151 AB - In September of 2012 a collaboration between Lawrence Livermore National Laboratory; University of Nevada, Reno; and Optim performed two 100-station nine-component vibrator reflection and refraction microtremor surveys. The objective of the surveys was to record seismic ground motion data to map the depth and structure of the subsurface collapse of an underground nuclear test explosion (UNE), detonated at 608 m depth. The collapse region extended upward to at least 270 m depth, but did not produce a surface collapse crater. Although none of the multicomponent source or receiver combinations showed first arrivals that could be easily picked, P-P reflection brute stacks of the longest line did show reflections near the collapsed UNE cavity, as well as terminations and possible diffractions at the edges of the collapse chimney. SH-SH and P-SV reflection stacks of that line showed somewhat stronger reflections from the location of the collapsed cavity, as well as from the volcanic stratigraphy. We hypothesize that we are observing P to SV conversions in the VP vibrator component recorded by the geophone X component. While these multicomponent reflections are apparently correlated with blast and stratigraphic features, they are not unique and therefore not diagnostic of the blast effects. Multicomponent refraction microtremor (ReMi(TM)) analysis assessed shear-wave velocities to more than 0.5 km depth. The technique clearly defined the lateral location of the collapse chimney, which spans an area approximately 150 m wide. Rather than in the center, the chimney is located in the western half of the UNE region. While the lateral location of the chimney is robust, the vertical dimensions are not. This is due to non-uniqueness of the forward modeling resulting from trade-off between material velocity and layer thickness. Equally plausible models have varying velocity within the chimney, but constrain the upper limit of the collapse to 222 m to 240 m depth. The models can delimit the range of possibilities for the chimney size. The collapse chimney extends to an upper limit of 192 m to 270 m depth, with an average depth of approximately 230 m. Towards the west, the chimney size decreases, extending to depths of 355.5 m and 397 m. Data recorded at least 0.5 km away from the collapse region facilitated detection of the vertical dimensions of the chimney. JF - American Geophysical Union Fall Meeting AU - Louie, J N AU - Pullammanappallil, S K AU - Dorsey, A AU - West, T AU - Sweeney, J J AU - Mellors, R J AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2418 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664434791?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=P-+and+S-wave+imaging+of+cavity+collapse+at+the+site+of+an+underground+nuclear+test&rft.au=Louie%2C+J+N%3BPullammanappallil%2C+S+K%3BDorsey%2C+A%3BWest%2C+T%3BSweeney%2C+J+J%3BMellors%2C+R+J%3BAnonymous&rft.aulast=Louie&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Application of dipole-dipole, induced polarization, and CSAMT electrical methods to detect evidence of an underground nuclear explosion AN - 1664434717; 2015-023152 AB - There is little experience with application of electrical methods that can be applied during the continuation period of an on-site inspection (OSI), one of the verification methods of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). In order add to such experience, we conducted controlled source audiomagnetotelluric (CSAMT), dipole-dipole resistivity, and induced polarization electrical measurements along three survey lines over and near to ground zero of an historic nuclear explosion. The presentation will provide details and results of the surveys, an assessment of application of the method toward the purposes of an OSI, and an assessment of the manpower and time requirements for data collection and processing that will impact OSI inspection team operations. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Sweeney, J J AU - Felske, D AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2419 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664434717?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Application+of+dipole-dipole%2C+induced+polarization%2C+and+CSAMT+electrical+methods+to+detect+evidence+of+an+underground+nuclear+explosion&rft.au=Sweeney%2C+J+J%3BFelske%2C+D%3BAnonymous&rft.aulast=Sweeney&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Sensitivity analysis of fault simulation parameters for induced seismicity due to CO2 injection AN - 1664434667; 2015-023179 AB - Earthquake simulations are performed to generate seismicity catalogs from a fault under two conditions: hydrostatic and elevated pore pressure due to CO2 injection. We use RSQSim (the rate and state earthQuake Simulator from Richards-Dinger & Dieterich, 2012) to model the seismicity. RSQSim uses a rate-and-state law that describes the evolution of the frictional shear strength of a fault under constant-rate tectonic shear loading. The resulting seismicity will depend on fault properties, most of which are poorly known. Therefore we analyze the sensitivity of the simulation outputs to key fault input parameters. We first carry out a total sensitivity analysis to rank the parameters, and then we follow this with detailed individual sensitivity analyses of the top-ranked parameters. The metric used to assess sensitivity is the Gutenberg-Richter (G-R) b-value. We then compare the G-R b-values for the two cases: hydrostatic and injection. Our results demonstrate that the G-R b-value is most sensitive to the A/B ratio. A and B are dimensionless constants in the rate-and-state law whose ranges are derived from laboratory data. Other key parameters approximate elastodynamic processes that are not accounted for in the rate-and-state law itself. Knowledge of these parameters will help focus fault characterization efforts and an understanding of induced events. JF - American Geophysical Union Fall Meeting AU - Trainor Guitton, W AU - Johnson, S AU - White, J AU - Foxall, W AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33D EP - 2446 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664434667?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sensitivity+analysis+of+fault+simulation+parameters+for+induced+seismicity+due+to+CO2+injection&rft.au=Trainor+Guitton%2C+W%3BJohnson%2C+S%3BWhite%2C+J%3BFoxall%2C+W%3BAnonymous&rft.aulast=Trainor+Guitton&rft.aufirst=W&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Imaging the site of the source physics experiment using seismic interferometry AN - 1664433152; 2015-023158 AB - The Source Physics Experiment (SPE) is a series of precisely designed explosions recorded by a dense network of seismometers. Its purpose is to obtain a physics-based understanding of how seismic waves are created at and scattered near the source. In order to separate source-specific effects from those due to geological heterogeneity, we need a precise picture of the subsurface. In this study, we are using several methods of seismic interferometry to obtain highly detailed images of the SPE site. Coda wave interferometry (CI) uses the diffuse coda from earthquakes or explosions as a source of coherent energy. Ambient noise correlation (ANC) uses the energy of the ambient background field. In each technique, the data recorded at one seismometer are correlated with the data recorded at another to obtain an estimate of the Green's function (GF) between the two. More than 150 instruments were deployed around the site, predominantly along 5 lines extending radially outward from the shot point. Most of those are located within 2 km. We used the records of one of the SPE shots as an energy source for the CI technique and 3 months of high gain continuous data for ANC. Each technique has advantages over the other. CI is very fast (only a few minutes of data are needed, compared to the weeks to years of continuous data often required for ANC), and the GF obtained has the same frequency content as the original shot (while the spectrum of ANC is determined by the natural background noise). Using CI on the SPE data, we obtain very good quality estimate of the GF to very high frequency. The key disadvantages of CI are that we can only correlate energy propagating radially outward and the source point itself is hidden. ANC requires more data and processing time, but allows us to estimate the GF between any two of the seismometers. By combining the two techniques, we obtain a very sharp image of seismic velocity and attenuation in the upper several kilometers beneath the site. Using CI, we recovered 860 high quality GFs along the 5 main lines. ANC gave us several thousand more, including paths that cross the source point and between the lines. Among key observations, we are able to map a thin (20-50 m), very low velocity (150-250 m/s) layer at the surface in the southeast portion of the site, which results in significant differences in dispersion along the 5 lines. Our end result is a fully 3D tomogram of the subsurface with lateral resolution as small as 100 m. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-609858 JF - American Geophysical Union Fall Meeting AU - Matzel, E AU - Mellors, R J AU - Pitarka, A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2425 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664433152?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Imaging+the+site+of+the+source+physics+experiment+using+seismic+interferometry&rft.au=Matzel%2C+E%3BMellors%2C+R+J%3BPitarka%2C+A%3BAnonymous&rft.aulast=Matzel&rft.aufirst=E&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Stochastic three dimensional investigation of near-source motions from an underground explosion AN - 1664433128; 2015-023157 AB - We have performed 3D simulations of underground explosions conducted recently in granitic outcrop as part of the Source Physics Experiment (SPE) campaign. The main goal of these simulations is to understand the nature of the shear motions recorded in the near field under condition of uncertainties in a) the geological characterization of the joints, such as density, orientation and persistency and b) the geomechanical material properties, such as friction angle, bulk sonic speed, poro-elasticity etc. The approach is probabilistic; joints are depicted using a Boolean stochastic representation of inclusions conditional to their probability density functions inferred from borehole data. Then, using a novel continuum approach, joints and faults are painted into the continuum host material, granite. To insure the fidelity of the painted joints we have conducted a sensitivity study on the numerical depiction of joints. Simulating wave propagation into heterogeneous discontinuous rock mass is highly non-linear problem and uncertainty propagation via intrusive methods is practically forbidden. Therefore, using a series of nested Monte Carlo simulations, we have explored and propagated both the geological and the geomechanical uncertainty parameters using a Bayesian sampling approach. We have probabilistically shown that significant shear motions can be generated by sliding on the joints caused by spherical wave propagation. Polarity of the shear motion may change during unloading when the stress state may favor joint sliding on a different joint set. Although this study focuses on understanding shear wave generation in the near field, the overall goal of our investigation is to understand the far field seismic signatures associated with shear waves generated in the immediate vicinity of an underground explosion. Using a filtering technique, we have abstracted the near field behavior into a probabilistic source-zone model that can be used in the far field wave propagation study. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Vorobiev, O AU - Ezzedine, S M AU - Glenn, L A AU - Antoun, T AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2424 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664433128?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stochastic+three+dimensional+investigation+of+near-source+motions+from+an+underground+explosion&rft.au=Vorobiev%2C+O%3BEzzedine%2C+S+M%3BGlenn%2C+L+A%3BAntoun%2C+T%3BAnonymous&rft.aulast=Vorobiev&rft.aufirst=O&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - The impact of methane clathrate emissions on the Earth system AN - 1660631339; 2015-018645 AB - Methane is locked in ice-like deposits called clathrates in ocean sediments and underneath permafrost regions. Clathrates are stable under high pressures and low temperatures, so in a warming climate, increases in ocean temperatures could lead to dissociation of the clathrates and release methane into the ocean and subsequently the atmosphere, where methane is both an important greenhouse gas and a key species in atmospheric chemistry. Clathrates in the shallower parts of the Arctic Ocean (around 300m depth) are predicted to be particularly important since clathrates at that depth are expected to start outgassing abruptly in the next few decades. We will present the atmospheric impact of such methane emissions using multi-century steady-state simulations with a version of the Community Earth System Model (CESM) that includes atmospheric chemistry. Our simulations include a plausible release from clathrates in the Arctic that increases global methane emissions above present-day conditions by 22%, as well as a scenario with 10 times those clathrate emissions. The CESM model includes a fully interactive physical ocean, to which we added a fast atmospheric chemistry mechanism that represents methane as a fully interactive tracer (with emissions rather than concentration boundary conditions). The results indicate that such Arctic clathrate emissions (1) increase global methane concentrations by an average of 38%, non-uniformly; (2) increase surface ozone concentrations by around 10% globally, and even more in polluted regions; (3) increase methane lifetime by 13%; (4) increase the interannual variability in surface methane, surface ozone, and methane lifetime, and (5) show modest differences in surface temperature and methane lifetime compared to simulations in which the clathrate emissions are distributed uniformly. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Cameron-Smith, P J AU - Bhattacharyya, S AU - Bergmann, D J AU - Reagan, M T AU - Elliott, S AU - Moridis, G J AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract A23D EP - 0278 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660631339?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+impact+of+methane+clathrate+emissions+on+the+Earth+system&rft.au=Cameron-Smith%2C+P+J%3BBhattacharyya%2C+S%3BBergmann%2C+D+J%3BReagan%2C+M+T%3BElliott%2C+S%3BMoridis%2C+G+J%3BAnonymous&rft.aulast=Cameron-Smith&rft.aufirst=P&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Seismic source parameters and attenuation in southeast Asia AN - 1660631267; 2015-018846 AB - Southeast Asia is located at the juxtaposition of three major tectonic plates between the Eurasia, Indo-Australia, and Philippine Sea Plates. The collision of the Indian and Eurasian plates, the subduction of the Philippine Sea plate, and the northward motion of Australian plate define the major active tectonic boundaries and lead to the escape tectonics of mainland Southeast Asia. Due to the complex tectonics, the structure of the lithosphere is highly variable, with rapid lateral changes in crustal thickness, upper mantle velocities, and attenuation structure, all of which affect the observed ground motions of regional earthquakes. We utilized the data from openly available seismic stations and temporary deployments to investigate seismic source and attenuation parameters in the Southeast Asia region. For seismic source properties, we use the coda technique to calculate moment magnitudes and moment rate functions of large to moderate size events. Coda calibration of the region would allow region-wide robust magnitude and source parameter estimates. Stress drop estimates and the determination of attenuation structure would improve ground-motion simulation studies that have a profound effect on seismic hazard estimates and tsunami simulation. JF - American Geophysical Union Fall Meeting AU - Gok, R AU - Pasyanos, M AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S51A EP - 2327 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660631267?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+source+parameters+and+attenuation+in+southeast+Asia&rft.au=Gok%2C+R%3BPasyanos%2C+M%3BAnonymous&rft.aulast=Gok&rft.aufirst=R&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-03-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - The influence of pH on the oxygen isotope composition of calcium carbonate AN - 1648907000; 2015-009150 AB - Oxygen isotope fractionation between calcium carbonate and water is temperature-dependent and can therefore be used as a paleothermometer. Although oxygen isotope fractionation is expected from principles of equilibrium isotopic partitioning, the temperature-dependence remains uncertain because other factors, such as slow exchange between dissolved inorganic carbon (DIC) species and water, can obscure the temperature signal. Oxygen isotopic equilibrium between aqueous solution and calcium carbonate includes two distinct equilibria: equilibrium of the DIC species in solution (i.e., CO (sub 2(aq)) , H (sub 2) CO (sub 3) , HCO (sub 3) (super -) , and CO (sub 3) (super 2-) ) with water, and equilibrium between the dissolved inorganic carbon with the precipitated carbonate. To isolate kinetic isotope effects that arise at the mineral-solution interface, isotopic equilibrium among DIC species must be maintained. This can be accomplished by dissolving the enzyme carbonic anhydrase (CA) into the solution, thereby reducing the time required for isotopic equilibration between DIC species by approximately two orders of magnitude between pH 7.7 and 9.3. We conduct calcite growth experiments aimed specifically at measuring the pH-dependence of kinetic oxygen isotope effects during precipitation of calcite. We precipitated calcite from aqueous solution at a constant pH and controlled supersaturation over the pH range 7.7-9.3. For each experiment, a gas mixture of N (sub 2) and CO (sub 2) is constantly bubbled through a beaker containing approximately 1300 mL of solution (30 mM CaCl (sub 2) +5 mM NH (sub 4) Cl+0.1 mM SrCl (sub 2) ). As CO (sub 2) from the gas dissolves into solution, calcite crystals grow on the beaker walls. The pH of the solution is maintained by use of an autotitrator with NaOH as the titrant. We control the temperature, pH, the pCO (sub 2) of the gas inflow, and the gas inflow rate, and monitor the total alkalinity, the pCO (sub 2) of the gas outflow, and the amount of NaOH added. A constant crystal growth rate of approximately 1.6 mmol/m (super 2) /hr is maintained over all experiments. We will present results from this set of experiments and discuss kinetic oxygen isotope effects in the context of a recently-developed ion-by-ion growth model of calcite. JF - American Geophysical Union Fall Meeting AU - Hunt, Jonathan D AU - Watkins, J M AU - Ryerson, F J AU - DePaolo, D J AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract V51A EP - 2639 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648907000?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+influence+of+pH+on+the+oxygen+isotope+composition+of+calcium+carbonate&rft.au=Hunt%2C+Jonathan+D%3BWatkins%2C+J+M%3BRyerson%2C+F+J%3BDePaolo%2C+D+J%3BAnonymous&rft.aulast=Hunt&rft.aufirst=Jonathan&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Signals of dynamic coupling between mantle and lithosphere beneath the axis of the East Pacific Rise AN - 1648905378; 2015-011081 AB - Plate tectonic reconstructions indicate that the East Pacific Rise (EPR) and its ancestor the Pacific-Farallon Ridge (PFR) have maintained a remarkable longitudinal stability with respect to the mantle over the past 83 Ma, with 10,000 km of oceanic crust. Models of mantle convection based on joint seismic and geodynamic tomography inversions indicate that the EPR is also located directly above a long-lived region of strong mantle upwelling that extends from the core mantle boundary (CMB) to the surface. This observation, combined with a slowing of absolute plate velocities as the modelled upward buoyancy flux beneath the EPR has decreased in the past 5-10 Ma, suggests that dynamic coupling between the upwelling mantle and the ridge axis may be a significant factor in maintaining the position of the latter with respect to the former over geologically significant timescales. We use reconstructions of the spreading behaviour of the EPR/PFR system over the past 83 Ma, and its migration in the mantle reference frame, to further examine the signal of this dynamic interaction in order to understand its nature, and its relative contribution to the absolute motions of the Pacific and Nazca plates compared to the slab pull forces that are generally thought to almost completely dominate plate motion. In addition to the longitudinal stability of the ridge, maintained by long-term spreading asymmetry, the position of the instantaneous stage pole is also relatively constant in the mantle reference frame, such that the locus of maximum spreading for the ridge system is always found close to the region of maximum upward buoyancy flux in the underlying mantle. Furthermore, correlations between the spreading rate and net spreading asymmetry of the PFR/EPR and the rate of ridge axis migration in the mantle reference frame, and coupled absolute accelerations and decelerations of the Nazca and Pacific plates in the mantle reference frame, can only be simply explained by changes in forces acting at the ridge axis. Quasi-periodic 15-20 Myr co-variations in these parameters may be linked to changes in upward mantle buoyancy flux, with periods of reduced absolute ridge motion but accelerated absolute Pacific and Nazca motion, faster spreading and increased spreading asymmetry corresponding to periods of stronger dynamic coupling. JF - American Geophysical Union Fall Meeting AU - Rowan, C J AU - Rowley, D B AU - Forte, Alessandro M AU - Simmons, N A AU - Grand, Steve P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract T44C EP - 08 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648905378?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Signals+of+dynamic+coupling+between+mantle+and+lithosphere+beneath+the+axis+of+the+East+Pacific+Rise&rft.au=Rowan%2C+C+J%3BRowley%2C+D+B%3BForte%2C+Alessandro+M%3BSimmons%2C+N+A%3BGrand%2C+Steve+P%3BAnonymous&rft.aulast=Rowan&rft.aufirst=C&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Impact vaporization of planetesimal cores AN - 1645571787; 2015-006248 AB - The degree of mixing and chemical equilibration between the iron cores of planetesimals and the mantle of the growing Earth has important consequences for understanding the end stages of Earth's formation and planet formation in general. At the Sandia Z machine, we developed a new shock-and-release technique to determine the density on the liquid-vapor dome of iron, the entropy on the iron shock Hugoniot, and the criteria for shock-induced vaporization of iron. We find that the critical shock pressure to vaporize iron is 507(+65,-85) GPa and show that decompression from a 15 km/s impact will initiate vaporization of iron cores, which is a velocity that is readily achieved at the end stages of planet formation. Vaporization of the iron cores increases dispersal of planetesimal cores, enables more complete chemical equilibration of the planetesimal cores with Earth's mantle, and reduces the highly siderophile element abundance on the Moon relative to Earth due to the expanding iron vapor exceeding the Moon's escape velocity. Sandia National Laboratories is a multiprogram 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 Securities Administration under Contract No. DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Kraus, Richard G AU - Root, S AU - Lemke, R W AU - Stewart, S T AU - Jacobsen, S B AU - Mattsson, T R AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract V33D EP - 2792 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645571787?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+vaporization+of+planetesimal+cores&rft.au=Kraus%2C+Richard+G%3BRoot%2C+S%3BLemke%2C+R+W%3BStewart%2C+S+T%3BJacobsen%2C+S+B%3BMattsson%2C+T+R%3BAnonymous&rft.aulast=Kraus&rft.aufirst=Richard&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-01-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hydrothermal alteration in submarine basaltic rocks from the Reykjanes geothermal field, Iceland AN - 1645571241; 2015-006145 AB - The Iceland Deep Drilling Project (IDDP) is preparing to drill to 4-5 km in the Reykjanes Geothermal Field to sample geothermal fluids at supercritical temperature and pressure for power generation. The Reykjanes geothermal field is the on-land extension of the Reykjanes Ridge spreading center. The upper 1-2 kilometers drilled at Reykjanes are submarine basalts and basaltic sediments, hyalloclastites, and breccias, with an increasing proportion of basaltic intrusive rocks below 2 km depth. Geothermal fluids are evolved seawater with a composition similar to mid-ocean ridge hydrothermal systems. Zn- and Cu-rich sulfide scale, locally enriched in Au and Ag, are deposited in production pipes. The sulfide deposits are compositionally and isotopically similar to seafloor massive sulfides. In anticipation of deeper drilling, we have investigated the mineralogy and geochemistry of drill cuttings from a 3 km deep well (RN-17). The depth zoning of alteration minerals is similar to that described from other Icelandic geothermal fields, and is comparable to observed seafloor metamorphic gradients in ODP drill holes and ophiolites. Chlorite-epidote alteration occurs at depths >400 m and passes downhole through epidote-actinolite alteration and into amphibole facies (hornblende-calcic plagioclase) alteration below 2.5 km. Local zones of high temperature (>800 degrees C), granoblastic-textured, pyroxene hornfels, are interpreted to form by contact metamorphism during dike/sill emplacement. Similar granoblasically altered basalts were recovered from the base of the sheeted dikes in IODP Hole 1256D. Downhole compositional variations of drill cuttings, collected every 50 m, suggest that rocks below approximately 2 km are little altered. Whole-rock oxygen isotope profiles are consistent with low water/rock ratios, but suggest that early stages of hydrothermal alteration included meteoric water-derived fluids. Strontium isotope profiles indicate more extensive exchange with seawater-derived fluids. Drill core collected (100% recovery) at an in situ temperature of 320 degrees C from an inclined off-set hole drilled from RN-17 provides a sharp contrast to the drill cuttings. Original rock textures, including fine-scale banding and quenched crystals in hyalloclastite, are very well preserved, but the core is pervasively altered to amphibole-calcic plagioclase. Fluid inclusions in epidote veins record episodes of seawater boiling, and zonation of strontium isotopes across the veins indicates changing seawater-rock ratios, both of which may relate to dike emplacement. The compositional variation observed in 9 m of drill core far exceeds the compositional variation the lowermost km of drill cuttings. Different areas of the core show addition and depletion of silica, alkalies, and magnesium. The cuttings are highly biased due to selective recovery of relatively fresh igneous plagioclase and pyroxene crystals from intrusive bodies, and resistant alteration minerals such as vein quartz and epidote are more abundant in the cuttings relative to the core. Selective recovery of less altered rock during ocean drilling operations is a known problem, but the recovered core may be less representative of the degree of alteration than is generally appreciated. JF - American Geophysical Union Fall Meeting AU - Zierenberg, R A AU - Schiffman, P AU - Fowler, A P AU - Marks, N AU - Fridleifsson, G AU - Elders, Wilfred A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract V32B EP - 01 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645571241?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Hydrothermal+alteration+in+submarine+basaltic+rocks+from+the+Reykjanes+geothermal+field%2C+Iceland&rft.au=Zierenberg%2C+R+A%3BSchiffman%2C+P%3BFowler%2C+A+P%3BMarks%2C+N%3BFridleifsson%2C+G%3BElders%2C+Wilfred+A%3BAnonymous&rft.aulast=Zierenberg&rft.aufirst=R&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-02-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Core forensics; Earth's accretion and differentiation AN - 1645570448; 2015-006253 AB - Earth's accretion and its primitive differentiation are intimately interlinked processes. One way to constrain accretionary processes is by looking at the major differentiation event that took place during accretion: core formation. Understanding core formation and core composition can certainly shed a new light on early and late accretionary processes. On the other hand, testing certain accretionary models and hypothesis (fluxes, chemistries, timing) allows -short of validating them- at the very least to unambiguously refute them, through the "filter"' of core formation and composition. Earth's core formed during accretion as a result of melting, phase-separation, and segregation of accretionary building blocks (from meteorites to planetesimals). The bulk composition of the core and mantle depends on the evolution (pressure, temperature, composition) of core extraction during accretion. The entire process left a compositional imprint on both reservoirs: (1) in the silicate Earth, in terms of siderophile trace-element (Ni, Co, V, Cr, among others) concentrations and isotopic fractionation (Si, Cu, among others), a record that is observed in present-day mantle rocks; and (2) on the core, in terms of major element composition and light elements dissolved in the metal, a record that is observed by seismology through the core density-deficit. This imprint constitutes actually a fairly impressive set of evidence (siderophile element concentration and fractionation, volatile and siderophile element isotopic fractionation), can be used today to trace back the primordial processes that occurred 4.5 billion years ago. We are seeking to provide an overhaul of the standard core formation/composition models, by using a new rationale that bridges geophysics and geochemistry. The new ingredients are (1) new laser-heated diamond anvil cell partitioning data, dramatically extending the previous P-T conditions for experimental work, (2) ab initio molecular dynamics calculations to estimate outer-core density and bulk sound velocity, and combine it with seismology to define a range of possible compositions of the core that satisfies the observations, (3) a refined core formation model bringing together the continuousness of the overall process with the discreetness of the final impacts, and equilibrium thermodynamics with the non-equilibrium nature of certain processes (giant impacts, deep magma ocean). We propose a few strong constraints that come out from our models: (1) the Earth accreted in a rather oxidizing environment, (2) yielding an oxygen-rich core, in a (3) deep magma ocean ( approximately 1500 km) that could have (4) never been fully molten or fully equilibrated, at least during core extraction, despite the giant impacts. JF - American Geophysical Union Fall Meeting AU - Badro, J AU - Brodholt, J P AU - Siebert, J AU - Piet, H AU - Ryerson, F J AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract V33D EP - 2797 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645570448?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Core+forensics%3B+Earth%27s+accretion+and+differentiation&rft.au=Badro%2C+J%3BBrodholt%2C+J+P%3BSiebert%2C+J%3BPiet%2C+H%3BRyerson%2C+F+J%3BAnonymous&rft.aulast=Badro&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2015-01-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - Joint seismic and geodynamic evidence for a long-lived, stable mantle upwelling under the East Pacific Rise AN - 1641011850; 2015-001219 AB - Global seismic tomography has consistently imaged large-scale structures in the lower mantle under the Pacific Ocean and under Africa that are characterised by strongly reduced seismic shear velocities. These so-called "low shear-velocity provinces" (LVSP) have been variously interpreted as hot, stagnant thermochemical "piles" that are compositionally dense, or as deeply rooted expressions of positively buoyant, active upwellings. To distinguish which of these two end-member models is relevant to the actual dynamics in the deep mantle requires robust constraints on the density structure of these LVSP. Recent global tomography models reveal what appear to be three distinct 'lobes' of the Pacific LVSP: one located in the Western-Pacific mantle under the Caroline Islands, another in the South-Central-Pacific mantle under French Polynesia, and another below the East Pacific Rise (EPR), centred under Easter Island. To understand the dynamics and time-dependent evolution of these structures we employ recent tomography models derived from the joint inversion of global seismic and geodynamic data sets, which also include constraints from mineral physics (Simmons et al., GJI 2009, JGR 2010). A critically important feature of these joint tomography models is the inclusion of a laterally variable scaling between density and seismic shear velocity, thereby accounting for the spatially localized effect of compositional heterogeneity in the lower mantle. These lower-mantle compositional contributions to density are directly constrained by long-wavelength gravity anomaly data and the excess ellipticity of the CMB. We show that it is not possible to properly account for this compositional heterogeneity using a constant, or simple depth-dependent density-velocity scaling. We have carried out very-long-time mantle convection simulations employing as a starting condition the joint seismic-geodynamic inferences of mantle density structure (Glisovic et al., GJI 2012). We demonstrate with both time-reversed and forward integration of the thermal convective evolution of the LVSP under the Pacific, that the principal plume-like upwellings are directly under the EPR and under the Caroline Islands. The deep-mantle anomaly at the centre of the LVSP, under French Polynesia, yields almost no upwelling, owing to the joint seismic-geodynamic inference of significant compositional heterogeneity that opposes its thermal buoyancy. We find that the EPR 'superplume' is particularly long-lived and stable, over time spans in excess of a hundred million years (Glisovic et al., GJI 2012). Time-reversed simulations over the past 65 Ma also show a stable upwelling under the EPR (Glisovic & Forte, EPSL submitted 2013). This remarkable stability provides a direct explanation for the recent inference of strong lateral fixity of the EPR spreading centre from geological reconstructions of plate kinematics over the past 83 Ma (Rowley et al., AGU 2011, Nature submitted 2012). JF - American Geophysical Union Fall Meeting AU - Forte, Alessandro M AU - Glisovic, P AU - Rowley, D B AU - Simmons, N A AU - Grand, Steve P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract T41G EP - 02 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011850?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+seismic+and+geodynamic+evidence+for+a+long-lived%2C+stable+mantle+upwelling+under+the+East+Pacific+Rise&rft.au=Forte%2C+Alessandro+M%3BGlisovic%2C+P%3BRowley%2C+D+B%3BSimmons%2C+N+A%3BGrand%2C+Steve+P%3BAnonymous&rft.aulast=Forte&rft.aufirst=Alessandro&rft.date=2013-12-01&rft.volume=2013&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 2013 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 - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Past and future stability of deep peatland carbon stocks; assessing the nature and fate of carbon in a northern Minnesota ombrotrophic peatland AN - 1566814656; 2014-076074 AB - An ombrotrophic Picea-Sphagnum peatland located on the Marcell Experimental Forest in northern Minnesota is being prepared for experimental manipulations to evaluate carbon cycle responses to warming and elevated CO2. Pretreatment characterization of the peatland, which has a mean peat depth of nearly equal 3 meters, showed that belowground carbon (C) stocks were greater than 2200 MgC ha-1. This is easily 10X greater than the combined above- and belowground C stocks found in typical eastern deciduous forests. Carbon has accumulated under saturated, cool to cold conditions since the last glaciers receded some 10,000 years ago. Mean bulk-14C assessments show a modern C signature and decadal turnover time for peat in the raised hummock topography, as well as in the oxic acrotelm layer which extends to a depth of 30-cm below hollow microtopography. Deeper peat layers (below 30-cm depth) have C ages ranging from 1000- to 2000 years for relatively shallow layers, to between 7000 and 8000 years at 2.5 m depth. In contrast, the 14C signatures of dissolved inorganic C (DIC) and dissolved organic C (DOC), which reflect the substrates consumed by microbes, were relatively modern, even at depths of up to 2 meters. The modern 14C signatures indicate that microbial respiration at depth is fueled by surface inputs of DOC. Furthermore, the contrast in delta 14C between solid-phase peat and DOC at deeper peat depths will allow researchers to quantify the effects of warming and elevated CO2 on the fate of peat stored in this ombrotrophic peatland for millennia. It is unclear whether C accumulation in peatlands will continue under warmer conditions associated with atmospheric and climatic change. Modeled projections for net peat C turnover throughout the peat profile will be discussed in the context of the planned warming manipulations. Initial hypotheses suggest that peat accumulation may be sustained for low levels of warming, but shift to a pattern of net carbon release as both CO2 and CH4 for warmer future climates. JF - American Geophysical Union Fall Meeting AU - Hanson, P J AU - Chanton, J AU - Iversen, C M AU - McFarlane, K J AU - Tfaily, M M AU - Xu, X AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract B11J EP - 07 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566814656?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Past+and+future+stability+of+deep+peatland+carbon+stocks%3B+assessing+the+nature+and+fate+of+carbon+in+a+northern+Minnesota+ombrotrophic+peatland&rft.au=Hanson%2C+P+J%3BChanton%2C+J%3BIversen%2C+C+M%3BMcFarlane%2C+K+J%3BTfaily%2C+M+M%3BXu%2C+X%3BAnonymous&rft.aulast=Hanson&rft.aufirst=P&rft.date=2013-12-01&rft.volume=2013&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 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Big data visual analytics for exploratory earth system simulation analysis AN - 1510396873; 2014-021266 AB - Rapid increases in high performance computing are feeding the development of larger and more complex data sets in climate research, which sets the stage for so-called "big data" analysis challenges. However, conventional climate analysis techniques are inadequate in dealing with the complexities of today's data. In this paper, we describe and demonstrate a visual analytics system, called the Exploratory Data analysis ENvironment (EDEN), with specific application to the analysis of complex earth system simulation data sets. EDEN represents the type of interactive visual analysis tools that are necessary to transform data into insight, thereby improving critical comprehension of earth system processes. In addition to providing an overview of EDEN, we describe real-world studies using both point ensembles and global Community Land Model Version 4 (CLM4) simulations. Abstract Copyright (2013) Elsevier, B.V. JF - Computers & Geosciences AU - Steed, Chad A AU - Ricciuto, Daniel M AU - Shipman, Galen AU - Smith, Brian AU - Thornton, Peter E AU - Wang, Dali AU - Shi, Xiaoying AU - Williams, Dean N Y1 - 2013/12// PY - 2013 DA - December 2013 SP - 71 EP - 82 PB - Elsevier, Amsterdam VL - 61 SN - 0098-3004, 0098-3004 KW - data acquisition KW - statistical analysis KW - data processing KW - EDEN system KW - simulation KW - climate change KW - models KW - visualization KW - multivariate analysis KW - sensitivity analysis KW - mathematical methods KW - climate KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510396873?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Big+data+visual+analytics+for+exploratory+earth+system+simulation+analysis&rft.au=Steed%2C+Chad+A%3BRicciuto%2C+Daniel+M%3BShipman%2C+Galen%3BSmith%2C+Brian%3BThornton%2C+Peter+E%3BWang%2C+Dali%3BShi%2C+Xiaoying%3BWilliams%2C+Dean+N&rft.aulast=Steed&rft.aufirst=Chad&rft.date=2013-12-01&rft.volume=61&rft.issue=&rft.spage=71&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Geosciences&rft.issn=00983004&rft_id=info:doi/10.1016%2Fj.cageo.2013.07.025 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 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 24 N1 - Document feature - illus. N1 - Last updated - 2014-03-27 N1 - CODEN - GGEOD5 N1 - SubjectsTermNotLitGenreText - climate; climate change; data acquisition; data processing; EDEN system; mathematical methods; models; multivariate analysis; sensitivity analysis; simulation; statistical analysis; visualization DO - http://dx.doi.org/10.1016/j.cageo.2013.07.025 ER - TY - JOUR T1 - Sorptive fractionation of organic matter and formation of organo-hydroxy-aluminum complexes during litter biodegradation in the presence of gibbsite AN - 1464891703; 2013-091211 AB - Solid and aqueous phase Al species are recognized to affect organic matter (OM) stabilization in forest soils. However, little is known about the dynamics of formation, composition and dissolution of organo-Al hydroxide complexes in microbially-active soil systems, where plant litter is subject to microbial decomposition in close proximity to mineral weathering reactions. We incubated gibbsite-quartz mineral mixtures in the presence of forest floor material inoculated with a native microbial consortium for periods of 5, 60 and 154 days. At each time step, samples were density separated into light (2.0 g cm (super -3) ) fractions. The light fraction was mainly comprised of particulate organic matter, while the intermediate and heavy density fractions contained moderate and large amounts of Al-minerals, respectively. Multi-method interrogation of the fractions indicated the intermediate and heavy fractions differed both in mineral structure and organic compound composition. X-ray diffraction analysis and SEM/EDS of the mineral component of the intermediate fractions indicated some alteration of the original gibbsite structure into less crystalline Al hydroxide and possibly proto-imogolite species, whereas alteration of the gibbsite structure was not evident in the heavy fraction. DRIFT, Py-GC/MS and STXM/NEXAFS results all showed that intermediate fractions were composed mostly of lignin-derived compounds, phenolics, and polysaccharides. Heavy fraction organics were dominated by polysaccharides, and were enriched in proteins, N-bearing compounds, and lipids. The source of organics appeared to differ between the intermediate and heavy fractions. Heavy fractions were enriched in (super 13) C with lower C/N ratios relative to intermediate fractions, suggesting a microbial origin. The observed differential fractionation of organics among hydroxy-Al mineral types suggests that microbial activity superimposed with abiotic mineral-surface-mediated fractionation leads to strong density differentiation of organo-mineral complex composition even over the short time scales probed in these incubation experiments. The data highlight the strong interdependency of mineral transformation, microbial community activity, and organic matter stabilization during biodegradation. Abstract Copyright (2013) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Heckman, K AU - Grandy, A S AU - Gao, X AU - Keiluweit, M AU - Wickings, K AU - Carpenter, K AU - Chorover, J AU - Rasmussen, C Y1 - 2013/11/15/ PY - 2013 DA - 2013 Nov 15 SP - 667 EP - 683 PB - Elsevier, New York, NY VL - 121 SN - 0016-7037, 0016-7037 KW - forest soils KW - sorption KW - X-ray diffraction data KW - polysaccharides KW - complexing KW - gas chromatograms KW - mass spectra KW - infrared spectra KW - FTIR spectra KW - phenols KW - chemical reactions KW - oxides KW - carbohydrates KW - spectra KW - gibbsite KW - soils KW - liquid phase KW - stabilization KW - biodegradation KW - pedogenesis KW - experimental studies KW - textures KW - biochemistry KW - statistical analysis KW - solid phase KW - hydroxides KW - organic compounds KW - biogenic processes KW - chromatograms KW - EXAFS data KW - crystal chemistry KW - SEM data KW - microorganisms KW - chemical fractionation KW - 25:Soils KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1464891703?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sorptive+fractionation+of+organic+matter+and+formation+of+organo-hydroxy-aluminum+complexes+during+litter+biodegradation+in+the+presence+of+gibbsite&rft.au=Heckman%2C+K%3BGrandy%2C+A+S%3BGao%2C+X%3BKeiluweit%2C+M%3BWickings%2C+K%3BCarpenter%2C+K%3BChorover%2C+J%3BRasmussen%2C+C&rft.aulast=Heckman&rft.aufirst=K&rft.date=2013-11-15&rft.volume=121&rft.issue=&rft.spage=667&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2013.07.043 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 97 N1 - PubXState - NY N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-12-05 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - biochemistry; biodegradation; biogenic processes; carbohydrates; chemical fractionation; chemical reactions; chromatograms; complexing; crystal chemistry; EXAFS data; experimental studies; forest soils; FTIR spectra; gas chromatograms; gibbsite; hydroxides; infrared spectra; liquid phase; mass spectra; microorganisms; organic compounds; oxides; pedogenesis; phenols; polysaccharides; SEM data; soils; solid phase; sorption; spectra; stabilization; statistical analysis; textures; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.gca.2013.07.043 ER - TY - JOUR T1 - Establishing a United States Nuclear Accident Dosimetry Laboratory AN - 1671603128; 20460180 AB - The United States Department of Energy Nuclear Criticality Safety Program (NCSP) in conjunction with Lawrence Livermore National Laboratory has established a Nuclear Accident Dosimeter Laboratory (NAD LAB) at the Nevada National Security Site (NNSS) to be used as a facility where national and international laboratories and other entities can test the response of nuclear accident dosimeters (NADs) as well as develop improved methods and design for nuclear criticality dosimetry. JF - Transactions of the American Nuclear Society AU - Hickman, David P AU - Burch, Jennifer G AU - Hudson, Rebecca R AU - Mcavoy, Douglas P AU - Slavik, Gary W AU - Wong, Carolyn T AU - Will, Rashelle D AD - Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94550 hickman3@llnl.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 905 EP - 906 PB - American Nuclear Society, Inc. VL - 109 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 - Security KW - Energy (nuclear) KW - Nuclear safety KW - Dosimeters KW - Dosimetry KW - Nuclear accidents KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671603128?accountid=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=Establishing+a+United+States+Nuclear+Accident+Dosimetry+Laboratory&rft.au=Hickman%2C+David+P%3BBurch%2C+Jennifer+G%3BHudson%2C+Rebecca+R%3BMcavoy%2C+Douglas+P%3BSlavik%2C+Gary+W%3BWong%2C+Carolyn+T%3BWill%2C+Rashelle+D&rft.aulast=Hickman&rft.aufirst=David&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=905&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 - Completion of the De-Inventory Program at Lawrence Livermore National Laboratory AN - 1671602091; 20460174 AB - The removal of Security Category I/II materials from Lawrence Livermore National Laboratory (LLNL) was initiated by the Department of Energy (DOE)-National Nuclear Security Administration's (NNSA's) goal of "Complex Transformation". In early 2007, NNSA established a completion date of FY2014 for the conversion of LLNL from Security Category I to Security Category III. In late 2007, that completion date was accelerated to FY2012. A significant amount of effort and money was spent to accomplish this task. Although LLNL's capabilities were stretched to meet the FY2012 timeline, the removal of Security Category I/II materials and conversion to Security Category III operations was completed on schedule by the end of FY2012. JF - Transactions of the American Nuclear Society AU - Riley, David AU - Biswas, Debdas AD - Lawrence Livermore National Laboratory riley8@mail.llnl.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 883 EP - 885 PB - American Nuclear Society, Inc. VL - 109 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 - Schedules KW - Energy (nuclear) KW - Transformations KW - Tasks KW - Conversion KW - Categories UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671602091?accountid=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=Completion+of+the+De-Inventory+Program+at+Lawrence+Livermore+National+Laboratory&rft.au=Riley%2C+David%3BBiswas%2C+Debdas&rft.aulast=Riley&rft.aufirst=David&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=883&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 - Comparisons of Hand-Held and Pager Radionuclide Identification Systems for Inspections AN - 1671584630; 20460265 AB - Under the Non-Proliferation Treaty (NPT) non-nuclear weapons states with nuclear facilities are subject to onsite inspections. The International Atomic Energy Agency (IAEA) provides facility assessments to ensure peaceful operations are undertaken. Inspections cover a range of nuclear technologies: fresh fuel fabrication plants, research and commercial reactors, wet and dry spent fuel storage sites, and fuel reprocessing facilities. JF - Transactions of the American Nuclear Society AU - Koglin, J AU - Sangiorgio, S AU - Murphy, L AD - Lawrence Livermore National Laboratory, Livermore, CA 94550; Pennsylvania State University, University Park, PA 16802 Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 1223 EP - 1226 PB - American Nuclear Society, Inc. VL - 109 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 - Weapons KW - Assessments KW - Fuels KW - Drying KW - Reprocessing KW - Inspection KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671584630?accountid=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=Comparisons+of+Hand-Held+and+Pager+Radionuclide+Identification+Systems+for+Inspections&rft.au=Koglin%2C+J%3BSangiorgio%2C+S%3BMurphy%2C+L&rft.aulast=Koglin&rft.aufirst=J&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=1223&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 - CPAPER T1 - Modeling of Wellbore Cement Core-Flood Experiments T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490520780; 6253585 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Myint, Philip AU - Walsh, Stuart AU - Du Frane, Wyatt AU - Mason, Harris AU - Hao, Yue AU - Carroll, Susan Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Cement UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490520780?accountid=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=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Modeling+of+Wellbore+Cement+Core-Flood+Experiments&rft.au=Myint%2C+Philip%3BWalsh%2C+Stuart%3BDu+Frane%2C+Wyatt%3BMason%2C+Harris%3BHao%2C+Yue%3BCarroll%2C+Susan&rft.aulast=Myint&rft.aufirst=Philip&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Response of Low-Permeability Carbonate Samples to CO2-Brine Exposure: Experiments & Modeling T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490519615; 6253583 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Smith, Megan AU - Hao, Yue AU - Carroll, Susan Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - carbonates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490519615?accountid=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=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Response+of+Low-Permeability+Carbonate+Samples+to+CO2-Brine+Exposure%3A+Experiments+%26amp%3B+Modeling&rft.au=Smith%2C+Megan%3BHao%2C+Yue%3BCarroll%2C+Susan&rft.aulast=Smith&rft.aufirst=Megan&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Geomechanical and Geochemical Influences On the Permeability of Wellbore Cement Fractures Exposed to CO2-Rich Brine: An Experimental and Modeling Study T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490517798; 6253587 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Carroll, Susan AU - Walsh, Stuart AU - Mason, Harris AU - Du Frane, Wyatt Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490517798?accountid=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=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Geomechanical+and+Geochemical+Influences+On+the+Permeability+of+Wellbore+Cement+Fractures+Exposed+to+CO2-Rich+Brine%3A+An+Experimental+and+Modeling+Study&rft.au=Carroll%2C+Susan%3BWalsh%2C+Stuart%3BMason%2C+Harris%3BDu+Frane%2C+Wyatt&rft.aulast=Carroll&rft.aufirst=Susan&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Onset of Buoyancy-Driven Convection in Cartesian and Cylindrical Geometries T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490508990; 6251000 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Myint, Philip AU - Firoozabadi, Abbas Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Convection UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490508990?accountid=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=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Onset+of+Buoyancy-Driven+Convection+in+Cartesian+and+Cylindrical+Geometries&rft.au=Myint%2C+Philip%3BFiroozabadi%2C+Abbas&rft.aulast=Myint&rft.aufirst=Philip&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Critical Materials Recycling & Substitutes For Critical Materials T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490505598; 6251571 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Jones, Edwin Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Recycling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490505598?accountid=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=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Critical+Materials+Recycling+%26amp%3B+Substitutes+For+Critical+Materials&rft.au=Jones%2C+Edwin&rft.aulast=Jones&rft.aufirst=Edwin&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Co-Electrophoretic Deposition of Composites: Understanding Deposition Mechanisms T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490504808; 6250935 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Pascall, Andrew AU - Mihaljevich, Brian AU - Sullivan, Kyle AU - Kuntz, Joshua Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Composite materials UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490504808?accountid=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=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Co-Electrophoretic+Deposition+of+Composites%3A+Understanding+Deposition+Mechanisms&rft.au=Pascall%2C+Andrew%3BMihaljevich%2C+Brian%3BSullivan%2C+Kyle%3BKuntz%2C+Joshua&rft.aulast=Pascall&rft.aufirst=Andrew&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Assessment and Perception of Risks Associated with Nuclear Waste T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490503936; 6252839 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Jones, Edwin AU - Whipple, Chris AU - Greenberg, Michael Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Risk assessment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490503936?accountid=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=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Assessment+and+Perception+of+Risks+Associated+with+Nuclear+Waste&rft.au=Jones%2C+Edwin%3BWhipple%2C+Chris%3BGreenberg%2C+Michael&rft.aulast=Jones&rft.aufirst=Edwin&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - JOUR T1 - Groundwater age distributions at a public drinking water supply well field derived from multiple age tracers ( (super 85) Kr, (super 3) H/ (super 3) He, and (super 39) Ar) AN - 1520105513; 2014-028037 AB - Groundwater age is a key aspect of production well vulnerability. Public drinking water supply wells typically have long screens and are expected to produce a mixture of groundwater ages. The groundwater age distributions of seven production wells of the Holten well field (Netherlands) were estimated from tritium-helium ( (super 3) H/ (super 3) He), krypton-85 ( (super 85) Kr), and argon-39 ( (super 39) Ar), using a new application of a discrete age distribution model and existing mathematical models, by minimizing the uncertainty-weighted squared differences of modeled and measured tracer concentrations. The observed tracer concentrations fitted well to a 4-bin discrete age distribution model or a dispersion model with a fraction of old groundwater. Our results show that more than 75% of the water pumped by four shallow production wells has a groundwater age of less than 20 years and these wells are very vulnerable to recent surface contamination. More than 50% of the water pumped by three deep production wells is older than 60 years. (super 3) H/ (super 3) He samples from short screened monitoring wells surrounding the well field constrained the age stratification in the aquifer. The discrepancy between the age stratification with depth and the groundwater age distribution of the production wells showed that the well field preferentially pumps from the shallow part of the aquifer. The discrete groundwater age distribution model appears to be a suitable approach in settings where the shape of the age distribution cannot be assumed to follow a simple mathematical model, such as a production well field where wells compete for capture area. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Visser, Ate AU - Broers, Hans Peter AU - Purtschert, Roland AU - Sueltenfuss, Juergen AU - de Jonge, Martin Y1 - 2013/11// PY - 2013 DA - November 2013 SP - 7778 EP - 7796 PB - American Geophysical Union, Washington, DC VL - 49 IS - 11 SN - 0043-1397, 0043-1397 KW - isotopes KW - H-3/He-3 KW - Holten Netherlands KW - Europe KW - drinking water KW - stable isotopes KW - ground water KW - Ar-39 KW - Kr-85 KW - radioactive isotopes KW - noble gases KW - age KW - tracers KW - helium KW - Netherlands KW - geochemistry KW - concentration KW - water supply KW - Western Europe KW - krypton KW - hydrochemistry KW - eastern Netherlands KW - argon KW - radioactive tracers KW - hydrogen KW - water wells KW - 03:Geochronology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520105513?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Groundwater+age+distributions+at+a+public+drinking+water+supply+well+field+derived+from+multiple+age+tracers+%28+%28super+85%29+Kr%2C+%28super+3%29+H%2F+%28super+3%29+He%2C+and+%28super+39%29+Ar%29&rft.au=Visser%2C+Ate%3BBroers%2C+Hans+Peter%3BPurtschert%2C+Roland%3BSueltenfuss%2C+Juergen%3Bde+Jonge%2C+Martin&rft.aulast=Visser&rft.aufirst=Ate&rft.date=2013-11-01&rft.volume=49&rft.issue=11&rft.spage=7778&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR014012 L2 - http://www.agu.org/journals/wr/ 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 - 95 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-05-01 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - age; Ar-39; argon; concentration; drinking water; eastern Netherlands; Europe; geochemistry; ground water; H-3/He-3; helium; Holten Netherlands; hydrochemistry; hydrogen; isotopes; Kr-85; krypton; Netherlands; noble gases; radioactive isotopes; radioactive tracers; stable isotopes; tracers; water supply; water wells; Western Europe DO - http://dx.doi.org/10.1002/2013WR014012 ER - TY - JOUR T1 - An observationally based constraint on the water-vapor feedback AN - 1492622425; 18986761 AB - The increase in atmospheric concentrations of water vapor with global warming is a large positive feedback in the climate system. Thus, even relatively small errors in its magnitude can lead to large uncertainties in predicting climate response to anthropogenic forcing. This study incorporates observed variability of water vapor over 2002-2009 from the Atmospheric Infrared Sounder instrument into a radiative transfer scheme to provide constraints on this feedback. We derive a short-term water vapor feedback of 2.2 plus or minus 0.4 Wm super(-2)K super(-1). Based on the relationship between feedback derived over short and long timescales in twentieth century simulations of 14 climate models, we estimate a range of likely values for the long-term twentieth century water vapor feedback of 1.9 to 2.8 Wm super(-2)K super(-1). We use the twentieth century simulations to determine the record length necessary for the short-term feedback to approach the long-term value. In most of the climate models we analyze, the short-term feedback converges to within 15% of its long-term value after 25 years, implying that a longer observational record is necessary to accurately estimate the water vapor feedback. Key Points * The water vapor feedback from observations is greater than most models predict * The water vapor feedback from interannual variability is an underestimate * 20 years of observations are needed to constrain the water vapor feedback JF - Journal of Geophysical Research. D. Atmospheres AU - Gordon, N D AU - Jonko, A K AU - Forster, P M AU - Shell, K M AD - Lawrence Livermore National Laboratory, Livermore, California, USA. Y1 - 2013/11// PY - 2013 DA - November 2013 SP - 12 EP - 12,443 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 118 IS - 22 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; Aqualine Abstracts; Sustainability Science Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - water vapor KW - climate feedback KW - Water Vapor KW - Variability KW - Climate change KW - Anthropogenic factors KW - Positive feedback KW - Temperature effects KW - Climate models KW - Water vapor KW - Water vapor in the atmosphere KW - Climates KW - Simulation KW - Greenhouse effect KW - Errors KW - Global Warming KW - Model Studies KW - Interannual variability KW - Numerical simulations KW - Global warming KW - Radiative transfer KW - Q2 09243:Structure, mechanics and thermodynamics KW - P 0000:AIR POLLUTION KW - M3 1010:Issues in Sustainable Development KW - SW 3020:Sources and fate of pollution KW - M2 551.588:Environmental Influences (551.588) KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492622425?accountid=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+Geophysical+Research.+D.+Atmospheres&rft.atitle=An+observationally+based+constraint+on+the+water-vapor+feedback&rft.au=Gordon%2C+N+D%3BJonko%2C+A+K%3BForster%2C+P+M%3BShell%2C+K+M&rft.aulast=Gordon&rft.aufirst=N&rft.date=2013-11-01&rft.volume=118&rft.issue=22&rft.spage=12&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research.+D.+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD020184 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Temperature effects; Climate change; Anthropogenic factors; Greenhouse effect; Radiative transfer; Interannual variability; Climate models; Numerical simulations; Water vapor in the atmosphere; Global warming; Positive feedback; Water vapor; Simulation; Variability; Water Vapor; Climates; Errors; Global Warming; Model Studies DO - http://dx.doi.org/10.1002/2013JD020184 ER - TY - JOUR T1 - Analysis of fault leakage from Leroy underground natural gas storage facility, Wyoming, USA TT - lAnalyse d'une fuite par faille de l'installation de stockage souterrain de gaz natlurel de Leroy, Wyoming, USA AN - 1458540117; 18732473 AB - Leroy natural-gas storage site is an anticlinal, fault-bounded, aquifer-storage system located in Wyoming, USA. Based on its abundant data, uncontrolled leakage history and subsequent control by the facility operators, a modeling framework was developed for studying reservoir behavior, examining pressure and gas-inventory histories, as well as gas and brine leakage, and evaluating the sensitivity of that behavior to uncertainty about reservoir properties. A three-dimensional model capturing the bounding fault, layered geologic stratigraphy, and surface topography was calibrated by history data of reservoir pressure and gas inventory. The calibrated model predicted gas arrival at the ground surface that was consistent with the timing of observed gas bubbling into a creek. A global sensitivity analysis was performed to examine the parameters influencing fault leakage, and a geomechanical stability analysis was conducted to investigate the likelihood of fault reactivation. In general, it is shown that a discrete leakage pathway is required to explain the observed gas leakage and its subsequent operational control by reducing reservoir pressures. Specifically, the results indicate that fault leakage is a plausible explanation for the observed gas leakage. The results are relevant to other natural-gas storage sites, as well as other subsurface storage applications of buoyant fluids, such as CO sub(2).Original Abstract: Le site de stockage de gaz naturel de Leroy est un systeme aquifere dans un anticlinal borde par faille, localise dans le Wyoming, USA. A partir de donnees historiques abondantes sur les fuites non controlees et des controles posterieurs par les operateurs de l'installation, un modele conceptuel cadre a ete developpe pour etudier le comportement du reservoir, en examinant les series chronologiques de pression et de reserves de gaz, ainsi que les fuites de gaz et de saumure et en evaluant la sensibilite des reponses aux incertitudes sur les proprietes du reservoir. Un modele tridimensionnel incluant la faille bordiere, la stratification geologique et la surface topographique a ete calibre avec les donnees historiques des pressions et reserves de gaz du reservoir. Le modele calibre predisant l'arrivee du gaz a la surface du sol est conforme au temps de degagement gazeux observe dans un ruisseau. Une analyse globale de sensibilite a ete effectuee pour examiner les parametres influencant la fuite par la faille, et une analyse de stabilite geomecanique a ete realisee pour etudier la probabilite de la reactivation de la faille. De maniere generale, on a montre qu'un passage distinct est necessaire pour expliquer la fuite de gaz observee et son controle operationnel ulterieur par la diminution des pressions dans le reservoir. En particulier, les resultats indiquent que la fuite par la faille est une explication plausible de la perte de gaz observee. Les resultats sont applicables a d'autres sites de stockage de gaz naturel, ainsi qu'a des applications de stockage en sub-surface de fluides volatils, tels que le CO sub(2). JF - Hydrogeology Journal AU - Chen, Mingjie AU - Buscheck, Thomas A AU - Wagoner, Jeffrey L AU - Sun, Yunwei AU - White, Joshua A AU - Chiaramonte, Laura AU - Aines, Roger D AD - Lawrence Livermore National Laboratory, P.O. Box 808, L-223, Livermore, CA, 94551, USA, cmj1014@yahoo.com Y1 - 2013/11// PY - 2013 DA - November 2013 SP - 1429 EP - 1445 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 21 IS - 7 SN - 1431-2174, 1431-2174 KW - Environment Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Historical account KW - Reservoir KW - Bubbling KW - History KW - Geology KW - Reservoirs KW - Topography KW - Geologic Fractures KW - Sensitivity KW - USA, Wyoming KW - Leakage KW - Surface topography KW - Stratigraphy KW - Creek KW - Natural gas KW - Model Studies KW - Natural Gas KW - Storage KW - Behavior KW - Sensitivity analysis KW - Faults KW - Carbon dioxide KW - Brines KW - ENA 11:Non-Renewable Resources KW - SW 5010:Network design KW - AQ 00006:Sewage KW - Q2 09405:Oil and gas UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1458540117?accountid=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=Analysis+of+fault+leakage+from+Leroy+underground+natural+gas+storage+facility%2C+Wyoming%2C+USA&rft.au=Chen%2C+Mingjie%3BBuscheck%2C+Thomas+A%3BWagoner%2C+Jeffrey+L%3BSun%2C+Yunwei%3BWhite%2C+Joshua+A%3BChiaramonte%2C+Laura%3BAines%2C+Roger+D&rft.aulast=Chen&rft.aufirst=Mingjie&rft.date=2013-11-01&rft.volume=21&rft.issue=7&rft.spage=1429&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-013-1020-1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-01 N1 - Number of references - 36 N1 - Last updated - 2016-04-13 N1 - SubjectsTermNotLitGenreText - Reservoir; Bubbling; Surface topography; Stratigraphy; Faults; Creek; Carbon dioxide; Natural gas; Brines; Storage; Sensitivity; Historical account; Leakage; Sensitivity analysis; Behavior; Geology; Reservoirs; Topography; Natural Gas; Geologic Fractures; History; Model Studies; USA, Wyoming DO - http://dx.doi.org/10.1007/s10040-013-1020-1 ER - TY - CPAPER T1 - Understanding Geochemical Processes Controlling Colloid-Facilitated Transport of Plutonium: From 10-Inch Core Experiments to Kilometer Scale Field Observations T2 - 2013 Annual Meeting & Exposition of the Geological Society of America AN - 1490519779; 6248689 JF - 2013 Annual Meeting & Exposition of the Geological Society of America AU - Kersting, Annie AU - Walensky, Justin AU - Roberts, Sarah AU - Zhao, Pihong AU - Phinney, Douglas AU - Zavarin, Mavrik Y1 - 2013/10/27/ PY - 2013 DA - 2013 Oct 27 KW - Geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490519779?accountid=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=2013+Annual+Meeting+%26+Exposition+of+the+Geological+Society+of+America&rft.atitle=Understanding+Geochemical+Processes+Controlling+Colloid-Facilitated+Transport+of+Plutonium%3A+From+10-Inch+Core+Experiments+to+Kilometer+Scale+Field+Observations&rft.au=Kersting%2C+Annie%3BWalensky%2C+Justin%3BRoberts%2C+Sarah%3BZhao%2C+Pihong%3BPhinney%2C+Douglas%3BZavarin%2C+Mavrik&rft.aulast=Kersting&rft.aufirst=Annie&rft.date=2013-10-27&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+%26+Exposition+of+the+Geological+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Investigating the Stability of Plutonium Adsorbed to Mineral Surfaces T2 - 2013 Annual Meeting & Exposition of the Geological Society of America AN - 1490510765; 6248691 JF - 2013 Annual Meeting & Exposition of the Geological Society of America AU - Begg, James Y1 - 2013/10/27/ PY - 2013 DA - 2013 Oct 27 KW - Minerals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490510765?accountid=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=2013+Annual+Meeting+%26+Exposition+of+the+Geological+Society+of+America&rft.atitle=Investigating+the+Stability+of+Plutonium+Adsorbed+to+Mineral+Surfaces&rft.au=Begg%2C+James&rft.aulast=Begg&rft.aufirst=James&rft.date=2013-10-27&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+%26+Exposition+of+the+Geological+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Examining the Order of Addition in Tertiary Sorption Experiments of Plutonium, Organic Matter, and Colloidal Montmorillonite T2 - 2013 Annual Meeting & Exposition of the Geological Society of America AN - 1490505607; 6248692 JF - 2013 Annual Meeting & Exposition of the Geological Society of America AU - Boggs, Mark Y1 - 2013/10/27/ PY - 2013 DA - 2013 Oct 27 KW - Organic matter UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490505607?accountid=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=2013+Annual+Meeting+%26+Exposition+of+the+Geological+Society+of+America&rft.atitle=Examining+the+Order+of+Addition+in+Tertiary+Sorption+Experiments+of+Plutonium%2C+Organic+Matter%2C+and+Colloidal+Montmorillonite&rft.au=Boggs%2C+Mark&rft.aulast=Boggs&rft.aufirst=Mark&rft.date=2013-10-27&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+%26+Exposition+of+the+Geological+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - JOUR T1 - Identification of a possible secondary picrotoxin-binding site on the GABA(A) receptor. AN - 1443997351; 24028067 AB - The type A GABA receptors (GABARs) are ligand-gated ion channels (LGICs) found in the brain and are the major inhibitory neurotransmitter receptors. Upon binding of an agonist, the GABAR opens and increases the intraneuronal concentration of chloride ions, thus hyperpolarizing the cell and inhibiting the transmission of the nerve action potential. GABARs also contain many other modulatory binding pockets that differ from the agonist-binding site. The composition of the GABAR subunits can alter the properties of these modulatory sites. Picrotoxin is a noncompetitive antagonist for LGICs, and by inhibiting GABAR, picrotoxin can cause overstimulation and induce convulsions. We use addition of picrotoxin to probe the characteristics and possible mechanism of an additional modulatory pocket located at the interface between the ligand-binding domain and the transmembrane domain of the GABAR. Picrotoxin is widely regarded as a pore-blocking agent that acts at the cytoplasmic end of the channel. However, there are also data to suggest that there may be an additional, secondary binding site for picrotoxin. Through homology modeling, molecular docking, and molecular dynamics simulations, we show that binding of picrotoxin to this interface pocket correlates with these data, and negative modulation occurs at the pocket via a kinking of the pore-lining helices into a more closed orientation. JF - Chemical research in toxicology AU - Carpenter, Timothy S AU - Lau, Edmond Y AU - Lightstone, Felice C AD - Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory , 7000 East Avenue, Livermore, California 94550, United States. Y1 - 2013/10/21/ PY - 2013 DA - 2013 Oct 21 SP - 1444 EP - 1454 VL - 26 IS - 10 KW - Lipid Bilayers KW - 0 KW - Receptors, GABA-A KW - Picrotoxin KW - 124-87-8 KW - Index Medicus KW - Molecular Docking Simulation KW - Lipid Bilayers -- chemistry KW - Allosteric Regulation KW - Protein Structure, Tertiary KW - Protein Binding KW - Lipid Bilayers -- metabolism KW - Binding Sites KW - Picrotoxin -- chemistry KW - Receptors, GABA-A -- metabolism KW - Receptors, GABA-A -- chemistry KW - Picrotoxin -- metabolism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1443997351?accountid=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+research+in+toxicology&rft.atitle=Identification+of+a+possible+secondary+picrotoxin-binding+site+on+the+GABA%28A%29+receptor.&rft.au=Carpenter%2C+Timothy+S%3BLau%2C+Edmond+Y%3BLightstone%2C+Felice+C&rft.aulast=Carpenter&rft.aufirst=Timothy&rft.date=2013-10-21&rft.volume=26&rft.issue=10&rft.spage=1444&rft.isbn=&rft.btitle=&rft.title=Chemical+research+in+toxicology&rft.issn=1520-5010&rft_id=info:doi/10.1021%2Ftx400167b LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-05-26 N1 - Date created - 2013-10-21 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1021/tx400167b ER - TY - JOUR T1 - An explicitly coupled hydro-geomechanical model for simulating hydraulic fracturing in arbitrary discrete fracture networks AN - 1510395290; 2014-019531 AB - Modeling hydraulic fracturing in the presence of a natural fracture network is a challenging task, owing to the complex interactions between fluid, rock matrix, and rock interfaces, as well as the interactions between propagating fractures and existing natural interfaces. Understanding these complex interactions through numerical modeling is critical to the design of optimum stimulation strategies. In this paper, we present an explicitly integrated, fully coupled discrete-finite element approach for the simulation of hydraulic fracturing in arbitrary fracture networks. The individual physical processes involved in hydraulic fracturing are identified and addressed as separate modules: a finite element approach for geomechanics in the rock matrix, a finite volume approach for resolving hydrodynamics, a geomechanical joint model for interfacial resolution, and an adaptive remeshing module. The model is verified against the Khristianovich-Geertsma-DeKlerk closed-form solution for the propagation of a single hydraulic fracture and validated against laboratory testing results on the interaction between a propagating hydraulic fracture and an existing fracture. Preliminary results of simulating hydraulic fracturing in a natural fracture system consisting of multiple fractures are also presented. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - International Journal for Numerical and Analytical Methods in Geomechanics AU - Fu, Pengcheng AU - Johnson, Scott M AU - Carrigan, Charles R Y1 - 2013/10/10/ PY - 2013 DA - 2013 Oct 10 SP - 2278 EP - 2300 PB - Wiley, Chichester VL - 37 IS - 14 SN - 0363-9061, 0363-9061 KW - hydraulic fracturing KW - experimental studies KW - hydraulics KW - numerical models KW - stress KW - mechanical properties KW - simulation KW - rock mechanics KW - laboratory studies KW - finite element analysis KW - fluid pressure KW - microseisms KW - reservoir properties KW - permeability KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510395290?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.atitle=An+explicitly+coupled+hydro-geomechanical+model+for+simulating+hydraulic+fracturing+in+arbitrary+discrete+fracture+networks&rft.au=Fu%2C+Pengcheng%3BJohnson%2C+Scott+M%3BCarrigan%2C+Charles+R&rft.aulast=Fu&rft.aufirst=Pengcheng&rft.date=2013-10-10&rft.volume=37&rft.issue=14&rft.spage=2278&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.issn=03639061&rft_id=info:doi/10.1002%2Fnag.2135 L2 - http://www3.interscience.wiley.com/journal/3312/home 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. 3 tables N1 - Last updated - 2014-03-27 N1 - SubjectsTermNotLitGenreText - experimental studies; finite element analysis; fluid pressure; hydraulic fracturing; hydraulics; laboratory studies; mechanical properties; microseisms; numerical models; permeability; reservoir properties; rock mechanics; simulation; stress DO - http://dx.doi.org/10.1002/nag.2135 ER - TY - JOUR T1 - Active accommodation of plate convergence in southern Iran; earthquake locations, triggered aseismic slip, and regional strain rates AN - 1524612549; 2014-031662 AB - We present a catalog of interferometric synthetic aperture radar (InSAR) constraints on deformation that occurred during earthquake sequences in southern Iran between 1992 and 2011, and explore the implications on the accommodation of large-scale continental convergence between Saudi Arabia and Eurasia within the Zagros Mountains. The Zagros Mountains, a salt-laden fold-and-thrust belt involving approximately 10 km of sedimentary rocks overlying Precambrian basement rocks, have formed as a result of ongoing continental collision since 10-20 Ma that is currently occurring at a rate of approximately 3 cm/yr. We first demonstrate that there is a biased misfit in earthquake locations in global catalogs that likely results from neglect of 3-D velocity structure. Previous work involving two M approximately 6 earthquakes with well-recorded aftershocks has shown that the deformation observed with InSAR may represent triggered slip on faults much shallower than the primary earthquake, which likely occurred within the basement rocks (>10 km depth). We explore the hypothesis that most of the deformation observed with InSAR spanning earthquake sequences is also due to shallow, triggered slip above a deeper earthquake, effectively doubling the moment release for each event. We quantify the effects that this extra moment release would have on the discrepancy between seismically and geodetically constrained moment rates in the region, finding that even with the extra triggered fault slip, significant aseismic deformation during the interseismic period is necessary to fully explain the convergence between Eurasia and Saudi Arabia. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Barnhart, William D AU - Lohman, Rowena B AU - Mellors, Robert J Y1 - 2013/10// PY - 2013 DA - October 2013 SP - 5699 EP - 5711 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 118 IS - 10 SN - 2169-9313, 2169-9313 KW - Iran KW - strain KW - slip rates KW - continental crust KW - displacements KW - continental lithosphere KW - neotectonics KW - seismicity KW - SAR KW - southern Iran KW - focus KW - tectonics KW - Asia KW - seismotectonics KW - Middle East KW - faults KW - Zagros KW - lithosphere KW - radar methods KW - plate convergence KW - InSAR KW - earthquakes KW - crust KW - fault zones KW - 19:Seismology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524612549?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Active+accommodation+of+plate+convergence+in+southern+Iran%3B+earthquake+locations%2C+triggered+aseismic+slip%2C+and+regional+strain+rates&rft.au=Barnhart%2C+William+D%3BLohman%2C+Rowena+B%3BMellors%2C+Robert+J&rft.aulast=Barnhart&rft.aufirst=William&rft.date=2013-10-01&rft.volume=118&rft.issue=10&rft.spage=5699&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2Fjgrb.50380 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 - 38 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Asia; continental crust; continental lithosphere; crust; displacements; earthquakes; fault zones; faults; focus; InSAR; Iran; lithosphere; Middle East; neotectonics; plate convergence; radar methods; SAR; seismicity; seismotectonics; slip rates; southern Iran; strain; tectonics; Zagros DO - http://dx.doi.org/10.1002/jgrb.50380 ER - TY - JOUR T1 - An explosion model comparison with insights from the source physics experiments AN - 1447102589; 2013-083973 AB - Seismic spectral models for chemical and nuclear explosions are used in many applications including network modeling and yield estimation. Here we compare the models presented in Denny and Johnson (1991) and Mueller and Murphy (1971) with each other and with new results from the Source Physics Experiments (SPE). We demonstrate analytically the two models are in substantial agreement for large and normally buried explosions, consistent with much of the historic data collected during American and Soviet nuclear testing. However, for small and/or deeply buried explosions, the spectral predictions of the two models can differ significantly. For example, the predicted yield of a 1 km deep, M (sub w) 2 nuclear explosion differs by more than a factor of 5; and, for the same moment and depth chemical explosion, the difference is greater than a factor of 10. We compare the models with initial data from the SPE, which include small and overburied chemical explosions. The corner frequency of the one-ton SPE explosion (SPE-2) is slightly higher than the Mueller and Murphy (1971) model and approximately double the Denny and Johnson (1991) model prediction. The absolute moment of the one-tenth ton SPE explosion (SPE-1) is near the Denny and Johnson (1991) prediction and an order of magnitude smaller than the Mueller and Murphy (1971) prediction. The low-frequency moment ratio for SPE-2/SPE-1 is more consistent with the Denny and Johnson (1991) model. The results presented here show the need for an improved explosion source model that can accommodate a wider range of yields and emplacement conditions. JF - Bulletin of the Seismological Society of America AU - Ford, Sean R AU - Walter, William R Y1 - 2013/10// PY - 2013 DA - October 2013 SP - 2937 EP - 2945 PB - Seismological Society of America, Berkeley, CA VL - 103 IS - 5 SN - 0037-1106, 0037-1106 KW - United States KW - experimental studies KW - explosions KW - seismic moment KW - chemical explosions KW - magnitude KW - Green function KW - elastic waves KW - models KW - southern Nevada KW - seismicity KW - algorithms KW - nuclear explosions KW - earthquakes KW - Nevada KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1447102589?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=An+explosion+model+comparison+with+insights+from+the+source+physics+experiments&rft.au=Ford%2C+Sean+R%3BWalter%2C+William+R&rft.aulast=Ford&rft.aufirst=Sean&rft.date=2013-10-01&rft.volume=103&rft.issue=5&rft.spage=2937&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120130035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 20 N1 - PubXState - CA N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2013-10-31 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; amplitude; chemical explosions; earthquakes; elastic waves; experimental studies; explosions; Green function; magnitude; models; Nevada; nuclear explosions; seismic moment; seismicity; southern Nevada; United States DO - http://dx.doi.org/10.1785/0120130035 ER - TY - JOUR T1 - Broadband ground-motion simulation of an intraslab earthquake and nonlinear site response; 2010 Ferndale, California, earthquake case study AN - 1438971105; 2013-075954 JF - Seismological Research Letters AU - Pitarka, Arben AU - Thio, Hong Kie AU - Somerville, Paul AU - Bonilla, Luis Fabian Y1 - 2013/10// PY - 2013 DA - October 2013 SP - 785 EP - 795 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 5 SN - 0895-0695, 0895-0695 KW - United States KW - technology KW - geologic hazards KW - data processing KW - acceleration KW - simulation KW - seismic response KW - California KW - seismicity KW - Humboldt Bay KW - seismic risk KW - propagation KW - tectonics KW - seismotectonics KW - faults KW - Ferndale earthquake 2010 KW - soil mechanics KW - stress KW - magnitude KW - depth KW - computer programs KW - case studies KW - kinematics KW - aftershocks KW - boreholes KW - natural hazards KW - ground motion KW - risk assessment KW - intraplate processes KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1438971105?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+ground-motion+simulation+of+an+intraslab+earthquake+and+nonlinear+site+response%3B+2010+Ferndale%2C+California%2C+earthquake+case+study&rft.au=Pitarka%2C+Arben%3BThio%2C+Hong+Kie%3BSomerville%2C+Paul%3BBonilla%2C+Luis+Fabian&rft.aulast=Pitarka&rft.aufirst=Arben&rft.date=2013-10-01&rft.volume=84&rft.issue=5&rft.spage=785&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220130031 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 - 2013-01-01 N1 - Number of references - 27 N1 - PubXState - CA N1 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - acceleration; aftershocks; boreholes; California; case studies; computer programs; data processing; depth; earthquakes; faults; Ferndale earthquake 2010; geologic hazards; ground motion; Humboldt Bay; instruments; intraplate processes; kinematics; magnitude; natural hazards; propagation; risk assessment; seismic response; seismic risk; seismicity; seismotectonics; simulation; soil mechanics; stress; technology; tectonics; United States DO - http://dx.doi.org/10.1785/0220130031 ER - TY - JOUR T1 - Scalable metagenomic taxonomy classification using a reference genome database AN - 1434027216; 18516518 AB - Motivation: Deep metagenomic sequencing of biological samples has the potential to recover otherwise difficult-to-detect microorganisms and accurately characterize biological samples with limited prior knowledge of sample contents. Existing metagenomic taxonomic classification algorithms, however, do not scale well to analyze large metagenomic datasets, and balancing classification accuracy with computational efficiency presents a fundamental challenge.Results: A method is presented to shift computational costs to an off-line computation by creating a taxonomy/genome index that supports scalable metagenomic classification. Scalable performance is demonstrated on real and simulated data to show accurate classification in the presence of novel organisms on samples that include viruses, prokaryotes, fungi and protists. Taxonomic classification of the previously published 150 giga-base Tyrolean Iceman dataset was found to take <20 h on a single node 40 core large memory machine and provide new insights on the metagenomic contents of the sample. JF - Bioinformatics AU - Ames, Sasha K AU - Hysom, David A AU - Gardner, Shea N AU - Lloyd, G Scott AU - Gokhale, Maya B AU - Allen, Jonathan E AD - super(1)Center for Applied Scientific Computing, super(2)Lawrence Livermore National Laboratory and super(3)Global Security Directorate, P. O. Box 808, Livermore, CA 94551, USA Y1 - 2013/09/15/ PY - 2013 DA - 2013 Sep 15 SP - 2253 EP - 2260 PB - Oxford University Press, Great Clarendon Street Oxford OX2 6DP United Kingdom VL - 29 IS - 18 SN - 1367-4803, 1367-4803 KW - Microbiology Abstracts C: Algology, Mycology & Protozoology; Biotechnology and Bioengineering Abstracts KW - Genomes KW - Data processing KW - Fungi KW - Algorithms KW - Computer applications KW - Databases KW - Computer programs KW - software KW - Memory KW - Microorganisms KW - Taxonomy KW - Bioinformatics KW - Prokaryotes KW - Nodes KW - Internet KW - K 03310:Genetics & Taxonomy KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434027216?accountid=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=Scalable+metagenomic+taxonomy+classification+using+a+reference+genome+database&rft.au=Ames%2C+Sasha+K%3BHysom%2C+David+A%3BGardner%2C+Shea+N%3BLloyd%2C+G+Scott%3BGokhale%2C+Maya+B%3BAllen%2C+Jonathan+E&rft.aulast=Ames&rft.aufirst=Sasha&rft.date=2013-09-15&rft.volume=29&rft.issue=18&rft.spage=2253&rft.isbn=&rft.btitle=&rft.title=Bioinformatics&rft.issn=13674803&rft_id=info:doi/10.1093%2Fbioinformatics%2Fbtt389 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Genomes; Data processing; Fungi; Algorithms; Computer applications; Computer programs; Databases; Memory; software; Microorganisms; Taxonomy; Prokaryotes; Bioinformatics; Nodes; Internet DO - http://dx.doi.org/10.1093/bioinformatics/btt389 ER - TY - JOUR T1 - Late Holocene variations in Pacific surface circulation and biogeochemistry inferred from proteinaceous deep-sea corals AN - 1443375822; 18677732 AB - delta super(15)N and delta super(13)C data obtained from samples of proteinaceous deep-sea corals collected from the North Pacific Subtropical Gyre (Hawaiian Archipelago) and the central equatorial Pacific (Line Islands) document multidecadal to century-scale variability in the isotopic composition of surface-produced particulate organic matter exported to the deep sea. Comparison of the delta super(13)C data, where Line Islands samples are 0.6ppt more positive than the Hawaiian samples, supports the contention that the North Pacific Subtropical Gyre is more efficient than the tropical upwelling system at trapping and/or recycling nutrients within the mixed layer. delta super(15)N values from the Line Islands samples are also more positive than those from the central gyre, and within the Hawaiian samples there is a gradient with more positive delta super(15)N values in samples from the main Hawaiian Islands versus the French Frigate Shoals in the Northwestern Hawaiian Islands. The gradient in the Hawaiian samples likely reflects the relative importance of algal acquisition of metabolic N via dissolved seawater nitrate uptake versus nitrogen fixation. The Hawaiian sample set also exhibits a strong decrease in delta super(15)N values from the mid-Holocene to present. We hypothesize that this decrease is most likely the result of decreasing trade winds, and possibly a commensurate decrease in entrainment of more positive delta super(15)N-NO sub(3) subthermocline water masses. JF - Biogeosciences AU - Guilderson, T P AU - McCarthy, MD AU - Dunbar, R B AU - Englebrecht, A AU - Roark, E B AD - Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA, USA Y1 - 2013/09/12/ PY - 2013 DA - 2013 Sep 12 SP - 6019 EP - 6028 PB - European Geosciences Union, c/o E.O.S.T. Strasbourg Cedex 67084 France VL - 10 IS - 9 SN - 1726-4170, 1726-4170 KW - Ecology Abstracts; Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources; Meteorological & Geoastrophysical Abstracts KW - Nitrate KW - Entrainment KW - Upwelling KW - Carbon isotopes KW - Nutrients KW - Recycling KW - Holocene KW - IN, North Pacific, North Pacific Subtropical Gyre KW - Deep water KW - Islands KW - Marine environment KW - IS, Equatorial Pacific KW - Coral KW - Deep sea KW - Corals KW - Wind KW - Algae KW - Data processing KW - Biogeochemistry KW - Mixed layer KW - Archipelagoes KW - Atmospheric circulation KW - Trapping KW - ISE, USA, Hawaii, French Frigate Shoals KW - Suspended matter in seawater KW - Shoals KW - Particulate organic matter KW - Nitrogen fixation KW - Nitrogen isotopes KW - M2 551.465:Structure/Dynamics/Circulation (551.465) KW - D 04040:Ecosystem and Ecology Studies KW - O 1080:Multi-disciplinary Studies KW - Q1 08187:Palaeontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1443375822?accountid=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=Biogeosciences&rft.atitle=Late+Holocene+variations+in+Pacific+surface+circulation+and+biogeochemistry+inferred+from+proteinaceous+deep-sea+corals&rft.au=Guilderson%2C+T+P%3BMcCarthy%2C+MD%3BDunbar%2C+R+B%3BEnglebrecht%2C+A%3BRoark%2C+E+B&rft.aulast=Guilderson&rft.aufirst=T&rft.date=2013-09-12&rft.volume=10&rft.issue=9&rft.spage=6019&rft.isbn=&rft.btitle=&rft.title=Biogeosciences&rft.issn=17264170&rft_id=info:doi/10.5194%2Fbg-10-6019-2013 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-10-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Shoals; Nitrogen fixation; Mixed layer; Carbon isotopes; Coral; Archipelagoes; Nitrogen isotopes; Holocene; Deep water; Nitrate; Entrainment; Data processing; Upwelling; Biogeochemistry; Nutrients; Recycling; Trapping; Islands; Particulate organic matter; Marine environment; Corals; Deep sea; Wind; Algae; Suspended matter in seawater; Atmospheric circulation; IS, Equatorial Pacific; IN, North Pacific, North Pacific Subtropical Gyre; ISE, USA, Hawaii, French Frigate Shoals DO - http://dx.doi.org/10.5194/bg-10-6019-2013 ER - TY - JOUR T1 - Prostate cancer invasion and metastasis: insights from mining genomic data AN - 1492627495; 18890931 AB - Prostate cancer (PCa) is the second most commonly diagnosed malignancy in men in the Western world and the second leading cause of cancer-related deaths among men worldwide. Although most cancers have the potential to metastasize under appropriate conditions, PCa favors the skeleton as a primary site of metastasis, suggesting that the bone microenvironment is conducive to its growth. PCa metastasis proceeds through a complex series of molecular events that include angiogenesis at the site of the original tumor, local migration within the primary site, intravasation into the blood stream, survival within the circulation, extravasation of the tumor cells to the target organ and colonization of those cells within the new site. In turn, each one of these steps involves a complicated chain of events that utilize multiple protein-protein interactions, protein signaling cascades and transcriptional changes. Despite the urgent need to improve current biomarkers for diagnosis, prognosis and drug resistance, advances have been slow. Global gene expression methods such as gene microarrays and RNA sequencing enable the study of thousands of genes simultaneously and allow scientists to examine molecular pathways of cancer pathogenesis. In this review, we summarize the current literature that explored high-throughput transcriptome analysis toward the advancement of biomarker discovery for PCa. Novel biomarkers are strongly needed to enable more accurate detection of PCa, improve prediction of tumor aggressiveness and facilitate the discovery of new therapeutic targets for tailored medicine. Promising molecular markers identified from gene expression profiling studies include HPN, CLU1, WT1, WNT5A, AURKA and SPARC. JF - Briefings in Functional Genomics AU - Hudson, Bryan D AU - Kulp, Kristen S AU - Loots, Gabriela G AD - Corresponding author. Bryan D. Hudson, Biology and Biotechnology Division, Lawrence Livermore National Laboratory, 7000 East Avenue, L-452, Livermore, CA 94550, USA., hudson27@llnl.gov Y1 - 2013/09// PY - 2013 DA - September 2013 SP - 397 EP - 410 PB - Oxford University Press, Oxford Journals, Great Clarendon Street Oxford OX2 6DP United Kingdom VL - 12 IS - 5 SN - 2041-2649, 2041-2649 KW - Genetics Abstracts; Biotechnology and Bioengineering Abstracts KW - Prostate cancer KW - metastasis KW - bone metastasis KW - biomarkers KW - microarrays KW - RNA-seq KW - Cell survival KW - Drug resistance KW - Bone growth KW - Angiogenesis KW - Tumors KW - DNA microarrays KW - Extravasation KW - Tumor cells KW - Metastases KW - Gene expression KW - Colonization KW - RNA KW - Reviews KW - Cell migration KW - genomics KW - Skeleton KW - Signal transduction KW - G 07880:Human Genetics KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492627495?accountid=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=Briefings+in+Functional+Genomics&rft.atitle=Prostate+cancer+invasion+and+metastasis%3A+insights+from+mining+genomic+data&rft.au=Hudson%2C+Bryan+D%3BKulp%2C+Kristen+S%3BLoots%2C+Gabriela+G&rft.aulast=Hudson&rft.aufirst=Bryan&rft.date=2013-09-01&rft.volume=12&rft.issue=5&rft.spage=397&rft.isbn=&rft.btitle=&rft.title=Briefings+in+Functional+Genomics&rft.issn=20412649&rft_id=info:doi/10.1093%2Fbfgp%2Felt021 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-12-01 N1 - Last updated - 2016-04-13 N1 - SubjectsTermNotLitGenreText - Cell survival; Drug resistance; Angiogenesis; Bone growth; Tumors; biomarkers; Tumor cells; Extravasation; DNA microarrays; Gene expression; Metastases; Colonization; Prostate cancer; RNA; Reviews; genomics; Cell migration; Signal transduction; Skeleton DO - http://dx.doi.org/10.1093/bfgp/elt021 ER - TY - JOUR T1 - A computational method for simulating subsurface flow and reactive transport in heterogeneous porous media embedded with flexible uncertainty quantification AN - 1464889679; 2013-095641 AB - In Chen et al. (2013), the fundamental concepts of the modular UQ methodology have been introduced for general multiphysics applications in which each physics module can be independently embedded with its internal UQ method (intrusive or nonintrusive) without losing the global uncertainty propagation property. In the current paper, we extend the modular UQ methodology to subsurface flow and reactive transport applications, which are characterized by high dimensionality in the stochastic space due to spatially random velocity field in randomly heterogeneous porous media. Specifically, we develop a scheme to reduce the dimension of the stochastic space. This is achieved via a doubly nested dimension reduction by applying Karhunen-Loeve expansion to the logarithmic hydraulic conductivity field, followed by Proper Orthogonal Decomposition to the velocity field. This scheme enables the modular UQ framework to handle spatially random models efficiently while maintaining solution accuracy. When compared against sampling-based nonintrusive UQ methods, the modular UQ method demonstrates a similar accuracy at a fraction of computational cost on designed numerical experiments. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Chen, X AU - Ng, B M AU - Sun, Y AU - Tong, C H Y1 - 2013/09// PY - 2013 DA - September 2013 SP - 5740 EP - 5755 PB - American Geophysical Union, Washington, DC VL - 49 IS - 9 SN - 0043-1397, 0043-1397 KW - UQ method KW - numerical models KW - fluid flow KW - porous materials KW - equations KW - preferential flow KW - two-dimensional models KW - ground water KW - finite element analysis KW - heterogeneous materials KW - transport KW - stochastic processes KW - quantitative analysis KW - movement KW - reactive transport KW - hydraulic conductivity KW - uncertainty KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1464889679?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+computational+method+for+simulating+subsurface+flow+and+reactive+transport+in+heterogeneous+porous+media+embedded+with+flexible+uncertainty+quantification&rft.au=Chen%2C+X%3BNg%2C+B+M%3BSun%2C+Y%3BTong%2C+C+H&rft.aulast=Chen&rft.aufirst=X&rft.date=2013-09-01&rft.volume=49&rft.issue=9&rft.spage=5740&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2Fwrcr.20454 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 52 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-12-05 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - equations; finite element analysis; fluid flow; ground water; heterogeneous materials; hydraulic conductivity; movement; numerical models; porous materials; preferential flow; quantitative analysis; reactive transport; stochastic processes; transport; two-dimensional models; uncertainty; UQ method DO - http://dx.doi.org/10.1002/wrcr.20454 ER - TY - JOUR T1 - Computation of traveltime covariances based on stochastic models of velocity heterogeneity AN - 1438969904; 2013-075993 AB - We formulate the error covariance for calculated seismic traveltimes (traveltime covariance) along any two propagation paths as a double integral of a covariance function describing velocity-model error (velocity covariance) with sensitivity distributions for the paths. Two numerical techniques are presented for evaluating the traveltime covariance matrix for multiple paths. The first technique evaluates the covariance matrix directly. The second evaluates the inverse of the covariance matrix summed with a covariance matrix for observational errors, as is utilized in event locators. Our approach takes the velocity covariance to be the Green's function of a differential operator, which can be specified in terms of physically meaningful parameters, such as spatially variable velocity variance and correlation lengths. Our numerical algorithms reduce to solving finite-difference equations based on the differential operator. As a demonstration, we compute traveltime covariance using ray-based sensitivity distributions and a suite of depth-dependent models of velocity covariance. We compare our theoretical calculations to empirical estimates of traveltime variance versus event-station distance, derived from observed residuals relative to the 'ak135' velocity model. Our calculations predict and explain some key features of the distance dependence of observed residual statistics, such as abrupt changes in variance at crossover points separating branches of the first-arrival traveltime curve. We find that the observed traveltime variances in the distance range 2 degrees -33 degrees are well matched by assuming a velocity standard deviation (relative to 'ak135') of >10 per cent in the crust and decaying from approximately 2 per cent in the uppermost mantle to near 0 per cent below the 410-km discontinuity. These variance estimates hold over a wide range of assumed correlation lengths of velocity error, which are not well constrained by traveltime variance observations. By providing a physical understanding of traveltime covariance, our approach may help in the development of improved methods for locating seismic events, for estimating path-specific corrections to baseline traveltime models, and for constraining the statistics of velocity variations in the Earth. JF - Geophysical Journal International AU - Rodi, William L AU - Myers, Stephen C Y1 - 2013/09// PY - 2013 DA - September 2013 SP - 1582 EP - 1595 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 194 IS - 3 SN - 0956-540X, 0956-540X KW - upper mantle KW - body waves KW - monitoring KW - statistical analysis KW - kriging KW - mantle KW - elastic waves KW - stochastic processes KW - seismicity KW - velocity structure KW - traveltime KW - seismic waves KW - algorithms KW - heterogeneity KW - earthquakes KW - 410-km discontinuity KW - covariance analysis KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1438969904?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Computation+of+traveltime+covariances+based+on+stochastic+models+of+velocity+heterogeneity&rft.au=Rodi%2C+William+L%3BMyers%2C+Stephen+C&rft.aulast=Rodi&rft.aufirst=William&rft.date=2013-09-01&rft.volume=194&rft.issue=3&rft.spage=1582&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggt171 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 25 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2013-10-03 N1 - SubjectsTermNotLitGenreText - 410-km discontinuity; algorithms; body waves; Comprehensive Test Ban Treaty; covariance analysis; earthquakes; elastic waves; heterogeneity; kriging; mantle; monitoring; seismic waves; seismicity; statistical analysis; stochastic processes; traveltime; upper mantle; velocity structure DO - http://dx.doi.org/10.1093/gji/ggt171 ER - TY - JOUR T1 - High-order curvilinear finite elements for axisymmetric Lagrangian hydrodynamics AN - 1448714491; 18610540 AB - In this paper we present an extension of our general high-order curvilinear finite element approach for solving the Euler equations in a Lagrangian frame [1] to the case of axisymmetric problems. The numerical approximation of these equations is important in a number of applications of compressible shock hydrodynamics and the reduction of 3D problems with axial symmetry to 2D computations provides a significant computational advantage. Unlike traditional staggered-grid hydrodynamics (SCH) methods, which use the so-called "area-weighting" scheme, we formulate our semi-discrete axisymmetric conservation laws directly in 3D and reduce them to a 2D variations form in a meridian cut of the original domain. This approach is a natural extension of the high-order curvilinear finite element framework we have developed for 2D and 3D problems in Cartesian geometry, leading to a rescaled momentum conservation equation which includes new radial terms in the pressure gradient and artificial viscosity forces. We show that this approach exactly conserves energy and we demonstrate via computational examples that it also excels at preserving symmetry in problems with symmetric initial conditions. The results also illustrate that our computational method does not produce spurious symmetry breaking near the axis of rotation, as is the case with many area-weighted approaches. JF - Computers & Fluids AU - Dobrev, V A AU - Ellis, TE AU - Kolev, T V AU - Rieben, R N AD - Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, United States, tzanio@llnl.gov Y1 - 2013/08/16/ PY - 2013 DA - 2013 Aug 16 SP - 58 EP - 69 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 83 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Viscosity KW - Mathematical models KW - Hydrodynamics KW - Computers KW - Finite Element Method KW - Conservation of momentum KW - Conservation KW - Pressure gradients KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1448714491?accountid=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=High-order+curvilinear+finite+elements+for+axisymmetric+Lagrangian+hydrodynamics&rft.au=Dobrev%2C+V+A%3BEllis%2C+TE%3BKolev%2C+T+V%3BRieben%2C+R+N&rft.aulast=Dobrev&rft.aufirst=V&rft.date=2013-08-16&rft.volume=83&rft.issue=&rft.spage=58&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Mathematical models; Hydrodynamics; Conservation of momentum; Pressure gradients; Viscosity; Computers; Finite Element Method; Conservation ER - TY - JOUR T1 - Failure analysis of parameter-induced simulation crashes in climate models AN - 1524400323; 19775509 AB - Simulations using IPCC (Intergovernmental Panel on Climate Change)-class climate models are subject to fail or crash for a variety of reasons. Quantitative analysis of the failures can yield useful insights to better understand and improve the models. During the course of uncertainty quantification (UQ) ensemble simulations to assess the effects of ocean model parameter uncertainties on climate simulations, we experienced a series of simulation crashes within the Parallel Ocean Program (POP2) component of the Community Climate System Model (CCSM4). About 8.5% of our CCSM4 simulations failed for numerical reasons at combinations of POP2 parameter values. We applied support vector machine (SVM) classification from machine learning to quantify and predict the probability of failure as a function of the values of 18 POP2 parameters. A committee of SVM classifiers readily predicted model failures in an independent validation ensemble, as assessed by the area under the receiver operating characteristic (ROC) curve metric (AUC > 0.96). The causes of the simulation failures were determined through a global sensitivity analysis. Combinations of 8 parameters related to ocean mixing and viscosity from three different POP2 parameterizations were the major sources of the failures. This information can be used to improve POP2 and CCSM4 by incorporating correlations across the relevant parameters. Our method can also be used to quantify, predict, and understand simulation crashes in other complex geoscientific models. JF - Geoscientific Model Development AU - Lucas, D D AU - Klein, R AU - Tannahill, J AU - Ivanova, D AU - Brandon, S AU - Domyancic, D AU - Zhang, Y AD - Lawrence Livermore National Laboratory, Livermore, CA, USA Y1 - 2013/08/07/ PY - 2013 DA - 2013 Aug 07 SP - 1157 EP - 1171 PB - Copernicus, Max-Planck-Strasse 13, 37191 Katlenburg-Lindau, Germany, Phone: +49-5556-99555-0, Fax: +49-5556-99555-70 VL - 6 IS - 4 KW - Meteorological & Geoastrophysical Abstracts; Sustainability Science Abstracts KW - Climate models KW - Ocean models KW - Quantitative analysis KW - Correlations KW - Simulation KW - Intergovernmental Panel on Climate Change KW - Ocean mixing KW - Viscosity KW - Classification KW - Numerical simulations KW - Sensitivity analysis KW - Oceans KW - Committees KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524400323?accountid=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=Geoscientific+Model+Development&rft.atitle=Failure+analysis+of+parameter-induced+simulation+crashes+in+climate+models&rft.au=Lucas%2C+D+D%3BKlein%2C+R%3BTannahill%2C+J%3BIvanova%2C+D%3BBrandon%2C+S%3BDomyancic%2C+D%3BZhang%2C+Y&rft.aulast=Lucas&rft.aufirst=D&rft.date=2013-08-07&rft.volume=6&rft.issue=4&rft.spage=1157&rft.isbn=&rft.btitle=&rft.title=Geoscientific+Model+Development&rft.issn=1991-959X&rft_id=info:doi/10.5194%2Fgmd-6-1157-2013 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Viscosity; Climate models; Sensitivity analysis; Numerical simulations; Ocean models; Correlations; Intergovernmental Panel on Climate Change; Ocean mixing; Classification; Committees; Oceans; Quantitative analysis; Simulation DO - http://dx.doi.org/10.5194/gmd-6-1157-2013 ER - TY - JOUR T1 - Microbially enhanced dissolution and reductive dechlorination of PCE by a mixed culture; model validation and sensitivity analysis AN - 1800392943; 2016-054616 AB - Reductive dechlorination catalyzed by organohalide-respiring bacteria is often considered for remediation of non-aqueous phase liquid (NAPL) source zones due to cost savings, ease of implementation, regulatory acceptance, and sustainability. Despite knowledge of the key dechlorinators, an understanding of the processes and factors that control NAPL dissolution rates and detoxification (i.e., ethene formation) is lacking. A recent column study demonstrated a 5-fold cumulative enhancement in tetrachloroethene (PCE) dissolution and ethene formation (Amos et al., 2009). Spatial and temporal monitoring of key geochemical and microbial (i.e., Geobacter lovleyi and Dehalococcoides mccartyi strains) parameters in the column generated a data set used herein as the basis for refinement and testing of a multiphase, compositional transport model. The refined model is capable of simulating the reactive transport of multiple chemical constituents produced and consumed by organohalide-respiring bacteria and accounts for substrate limitations and competitive inhibition. Parameter estimation techniques were used to optimize the values of sensitive microbial kinetic parameters, including maximum utilization rates, biomass yield coefficients, and endogenous decay rates. Comparison and calibration of model simulations with the experimental data demonstrate that the model is able to accurately reproduce measured effluent concentrations, while delineating trends in dechlorinator growth and reductive dechlorination kinetics along the column. Sensitivity analyses performed on the optimized model parameters indicate that the rates of PCE and cis-1,2-dichloroethene (cis-DCE) transformation and Dehalococcoides growth govern bioenhanced dissolution, as long as electron donor (i.e., hydrogen flux) is not limiting. Dissolution enhancements were shown to be independent of cis-DCE accumulation; however, accumulation of cis-DCE, as well as column length and flow rate (i.e., column residence time), strongly influenced the extent of reductive dechlorination. When cis-DCE inhibition was neglected, the model over-predicted ethene production ten-fold, while reductions in residence time (i.e., a two-fold decrease in column length or two-fold increase in flow rate) resulted in a more than 70% decline in ethene production. These results suggest that spatial and temporal variations in microbial community composition and activity must be understood to model, predict, and manage bioenhanced NAPL dissolution. Abstract Copyright (2013) Elsevier, B.V. JF - Journal of Contaminant Hydrology AU - Chen, Mingjie AU - Abriola, Linda M AU - Amos, Benjamin K AU - Suchomel, Eric J AU - Pennell, Kurt D AU - Loeffler, Frank E AU - Christ, John A Y1 - 2013/08// PY - 2013 DA - August 2013 SP - 117 EP - 130 PB - Elsevier, Amsterdam VL - 151 SN - 0169-7722, 0169-7722 KW - solute transport KW - chlorinated hydrocarbons KW - tetrachloroethylene KW - simulation KW - remediation KW - transport KW - sensitivity analysis KW - halogenated hydrocarbons KW - reduction KW - water pollution KW - experimental studies KW - pollutants KW - biochemistry KW - dehalogenation KW - pollution KW - equations KW - solubility KW - nonaqueous phase liquids KW - models KW - organic compounds KW - biogenic processes KW - dechlorination KW - mathematical methods KW - bacteria KW - microorganisms KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392943?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Microbially+enhanced+dissolution+and+reductive+dechlorination+of+PCE+by+a+mixed+culture%3B+model+validation+and+sensitivity+analysis&rft.au=Chen%2C+Mingjie%3BAbriola%2C+Linda+M%3BAmos%2C+Benjamin+K%3BSuchomel%2C+Eric+J%3BPennell%2C+Kurt+D%3BLoeffler%2C+Frank+E%3BChrist%2C+John+A&rft.aulast=Chen&rft.aufirst=Mingjie&rft.date=2013-08-01&rft.volume=151&rft.issue=&rft.spage=117&rft.isbn=&rft.btitle=&rft.title=Journal+of+Contaminant+Hydrology&rft.issn=01697722&rft_id=info:doi/10.1016%2Fj.jconhyd.2013.05.005 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 - 65 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2016-06-30 N1 - SubjectsTermNotLitGenreText - bacteria; biochemistry; biogenic processes; chlorinated hydrocarbons; dechlorination; dehalogenation; equations; experimental studies; halogenated hydrocarbons; mathematical methods; microorganisms; models; nonaqueous phase liquids; organic compounds; pollutants; pollution; reduction; remediation; sensitivity analysis; simulation; solubility; solute transport; tetrachloroethylene; transport; water pollution DO - http://dx.doi.org/10.1016/j.jconhyd.2013.05.005 ER - TY - JOUR T1 - Surrogate-based optimization of hydraulic fracturing in pre-existing fracture networks AN - 1492586119; 2014-007281 AB - Hydraulic fracturing has been used widely to stimulate production of oil, natural gas, and geothermal energy in formations with low natural permeability. Numerical optimization of fracture stimulation often requires a large number of evaluations of objective functions and constraints from forward hydraulic fracturing models, which are computationally expensive and even prohibitive in some situations. Moreover, there are a variety of uncertainties associated with the pre-existing fracture distributions and rock mechanical properties, which affect the optimized decisions for hydraulic fracturing. In this study, a surrogate-based approach is developed for efficient optimization of hydraulic fracturing well design in the presence of natural-system uncertainties. The fractal dimension is derived from the simulated fracturing network as the objective for maximizing energy recovery sweep efficiency. The surrogate model, which is constructed using training data from high-fidelity fracturing models for mapping the relationship between uncertain input parameters and the fractal dimension, provides fast approximation of the objective functions and constraints. A suite of surrogate models constructed using different fitting methods is evaluated and validated for fast predictions. Global sensitivity analysis is conducted to gain insights into the impact of the input variables on the output of interest, and further used for parameter screening. The high efficiency of the surrogate-based approach is demonstrated for three optimization scenarios with different and uncertain ambient conditions. Our results suggest the critical importance of considering uncertain pre-existing fracture networks in optimization studies of hydraulic fracturing. Abstract Copyright (2013) Elsevier, B.V. JF - Computers & Geosciences AU - Chen, Mingjie AU - Sun, Yunwei AU - Fu, Pengcheng AU - Carrigan, Charles R AU - Lu, Zhiming AU - Tong, Charles H AU - Buscheck, Thomas A Y1 - 2013/08// PY - 2013 DA - August 2013 SP - 69 EP - 79 PB - Elsevier, Amsterdam VL - 58 SN - 0098-3004, 0098-3004 KW - systems KW - hydraulic fracturing KW - data processing KW - optimization KW - petroleum KW - mechanical properties KW - simulation KW - reservoir rocks KW - models KW - geothermal energy KW - spatial distribution KW - fractures KW - geothermal reservoirs KW - naturally fractured reservoirs KW - mathematical methods KW - reservoir properties KW - water resources KW - fractals 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/1492586119?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Surrogate-based+optimization+of+hydraulic+fracturing+in+pre-existing+fracture+networks&rft.au=Chen%2C+Mingjie%3BSun%2C+Yunwei%3BFu%2C+Pengcheng%3BCarrigan%2C+Charles+R%3BLu%2C+Zhiming%3BTong%2C+Charles+H%3BBuscheck%2C+Thomas+A&rft.aulast=Chen&rft.aufirst=Mingjie&rft.date=2013-08-01&rft.volume=58&rft.issue=&rft.spage=69&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Geosciences&rft.issn=00983004&rft_id=info:doi/10.1016%2Fj.cageo.2013.05.006 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 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 42 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-01-30 N1 - CODEN - GGEOD5 N1 - SubjectsTermNotLitGenreText - data processing; fractals; fractures; geothermal energy; geothermal reservoirs; hydraulic fracturing; mathematical methods; mechanical properties; models; naturally fractured reservoirs; optimization; permeability; petroleum; reservoir properties; reservoir rocks; simulation; spatial distribution; systems; water resources DO - http://dx.doi.org/10.1016/j.cageo.2013.05.006 ER - TY - JOUR T1 - The influence of kinetics on the oxygen isotope composition of calcium carbonate AN - 1464887175; 2013-093351 AB - Paleotemperature reconstructions rely on knowledge of the equilibrium separation of oxygen isotopes between aqueous solution and calcium carbonate. Although oxygen isotope separation is expected on theoretical grounds, the temperature-dependence remains uncertain because other factors, such as slow exchange of isotopes between dissolved CO (sub 2) -species and water, can obscure the temperature signal. This is problematic for crystal growth experiments on laboratory timescales and for interpreting the oxygen isotope composition of crystals formed in natural settings. We present results from experiments in which inorganic calcite is precipitated in the presence of 0.25mu M dissolved bovine carbonic anhydrase (CA). The presence of dissolved CA accelerates oxygen isotope equilibration between the dissolved carbon species CO (sub 2) , H (sub 2) CO (sub 3) , HCO (sub 3) (super -) , CO (sub 3) (super 2-) and water, thereby eliminating this source of isotopic disequilibrium during calcite growth. The experimental results allow us to isolate, for the first time, kinetic oxygen isotope effects occurring at the calcite-water interface. We present a framework of ion-by-ion growth of calcite that reconciles our new measurements with measurements of natural cave calcites that are the best candidate for having precipitated under near-equilibrium conditions. Our findings suggest that isotopic equilibrium between calcite and water is unlikely to have been established in laboratory experiments or in many natural settings. The use of CA in carbonate precipitation experiments offers new opportunities to refine oxygen isotope-based geothermometers and to interrogate environmental variables other than temperature that influence calcite growth rates. Abstract Copyright (2013) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Watkins, James M AU - Nielsen, Laura C AU - Ryerson, Frederick J AU - DePaolo, Donald J Y1 - 2013/08/01/ PY - 2013 DA - 2013 Aug 01 SP - 349 EP - 360 PB - Elsevier, Amsterdam VL - 375 SN - 0012-821X, 0012-821X KW - growth rates KW - carbonic acid KW - geologic thermometry KW - oxygen KW - isotopes KW - crystal growth KW - aqueous solutions KW - stable isotopes KW - temperature KW - carbon dioxide KW - laboratory studies KW - paleotemperature KW - calcium carbonate KW - kinetics KW - inorganic acids KW - experimental studies KW - isotope ratios KW - solutes KW - O-18/O-16 KW - bicarbonate ion KW - equilibrium KW - calcite KW - precipitation KW - carbonates KW - 02D:Isotope geochemistry KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1464887175?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=The+influence+of+kinetics+on+the+oxygen+isotope+composition+of+calcium+carbonate&rft.au=Watkins%2C+James+M%3BNielsen%2C+Laura+C%3BRyerson%2C+Frederick+J%3BDePaolo%2C+Donald+J&rft.aulast=Watkins&rft.aufirst=James&rft.date=2013-08-01&rft.volume=375&rft.issue=&rft.spage=349&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2013.05.054 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 37 N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-12-05 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - aqueous solutions; bicarbonate ion; calcite; calcium carbonate; carbon dioxide; carbonates; carbonic acid; crystal growth; equilibrium; experimental studies; geologic thermometry; growth rates; inorganic acids; isotope ratios; isotopes; kinetics; laboratory studies; O-18/O-16; oxygen; paleotemperature; precipitation; solutes; stable isotopes; temperature DO - http://dx.doi.org/10.1016/j.epsl.2013.05.054 ER - TY - JOUR T1 - Mg and Si isotopic fractionation patterns in types B1 and B2 CAIs; implications for formation under different nebular conditions AN - 1438968265; 2013-078037 AB - Magnesium and silicon isotopic profiles across melilite grains in two type B1 and two type B2 calcium-aluminum-rich inclusions (CAIs) reveal differing but constant enrichments in heavy isotopes everywhere except 10 (super -4) bars), so surface volatilization was slower in the B2s and internal chemical and isotopic equilibrium was maintained over the interval of melilite crystallization. The outermost zones of the CAIs (< or =1000 mu m from the edge) are not consistently enriched in heavy isotopes relative to the interiors, as might be expected from diffusion-limited surface evaporation of the melt. In all cases, the magnesium in the CAI margins is lighter than in the interiors. In one case, silicon in the margin also is lighter, but locally in some CAIs, it is isotopically heavier near the surface. If melt evaporation played a role in the formation of these outer zones, a later event in many cases caused isotopic re-equilibration with an external and isotopically near-normal reservoir. Abstract Copyright The Meteoritical Society, 2013. JF - Meteoritics & Planetary Science AU - Bullock, Emma S AU - Knight, Kim B AU - Richter, Frank M AU - Kita, Noriko T AU - Ushikubo, Takayuki AU - McPherson, Glenn J AU - Davis, Andrew M AU - Mendybaev, Ruslan A Y1 - 2013/08// PY - 2013 DA - August 2013 SP - 1440 EP - 1458 PB - Meteoritical Society, Fayetteville, AR VL - 48 IS - 8 SN - 1086-9379, 1086-9379 KW - sorosilicates KW - silicates KW - isotope fractionation KW - magnesium KW - stony meteorites KW - ion probe data KW - isotopes KW - calcium-aluminum inclusions KW - mass spectra KW - akermanite KW - CV chondrites KW - thermal history KW - silicon KW - stable isotopes KW - Allende Meteorite KW - volatilization KW - meteorites KW - melilite group KW - melilite KW - Mg-25/Mg-24 KW - inclusions KW - orthosilicates KW - spectra KW - chondrites KW - alkaline earth metals KW - Leoville Meteorite KW - isotope ratios KW - Vigarano Meteorite KW - carbonaceous chondrites KW - solar nebula KW - metals KW - crystallization KW - Si-30/Si-28 KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1438968265?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mg+and+Si+isotopic+fractionation+patterns+in+types+B1+and+B2+CAIs%3B+implications+for+formation+under+different+nebular+conditions&rft.au=Bullock%2C+Emma+S%3BKnight%2C+Kim+B%3BRichter%2C+Frank+M%3BKita%2C+Noriko+T%3BUshikubo%2C+Takayuki%3BMcPherson%2C+Glenn+J%3BDavis%2C+Andrew+M%3BMendybaev%2C+Ruslan+A&rft.aulast=Bullock&rft.aufirst=Emma&rft.date=2013-08-01&rft.volume=48&rft.issue=8&rft.spage=1440&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12158 L2 - http://cavern.uark.edu/~meteor/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 34 N1 - PubXState - AR N1 - Document feature - illus. N1 - Last updated - 2013-10-03 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - akermanite; alkaline earth metals; Allende Meteorite; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; crystallization; CV chondrites; inclusions; ion probe data; isotope fractionation; isotope ratios; isotopes; Leoville Meteorite; magnesium; mass spectra; melilite; melilite group; metals; meteorites; Mg-25/Mg-24; orthosilicates; Si-30/Si-28; silicates; silicon; solar nebula; sorosilicates; spectra; stable isotopes; stony meteorites; thermal history; Vigarano Meteorite; volatilization DO - http://dx.doi.org/10.1111/maps.12158 ER - TY - JOUR T1 - (super 26) Al- (super 26) Mg isotope systematics of the first solids in the early solar system AN - 1438968091; 2013-078033 AB - High-precision bulk aluminum-magnesium isotope measurements of calcium-aluminum-rich inclusions (CAIs) from CV carbonaceous chondrites in several laboratories define a bulk (super 26) Al- (super 26) Mg isochron with an inferred initial (super 26) Al/ (super 27) Al ratio of approximately 5.25 X 10 (super -5) , named the canonical ratio. Nonigneous CV CAIs yield well-defined internal (super 26) Al- (super 26) Mg isochrons consistent with the canonical value. These observations indicate that the canonical (super 26) Al/ (super 27) Al ratio records initial Al/Mg fractionation by evaporation and condensation in the CV CAI-forming region. The internal isochrons of igneous CV CAIs show a range of inferred initial (super 26) Al/ (super 27) Al ratios, (4.2-5.2) X 10 (super -5) , indicating that CAI melting continued for at least 0.2 Ma after formation of their precursors. A similar range of initial (super 26) Al/ (super 27) Al ratios is also obtained from the internal isochrons of many CAIs (igneous and nonigneous) in other groups of carbonaceous chondrites. Some CAIs and refractory grains (corundum and hibonite) from unmetamorphosed or weakly metamorphosed chondrites, including CVs, are significantly depleted in (super 26) Al. At least some of these refractory objects may have formed prior to injection of (super 26) Al into the protosolar molecular cloud and its subsequent homogenization in the protoplanetary disk. Bulk aluminum and magnesium-isotope measurements of various types of chondrites plot along the bulk CV CAI isochron, suggesting homogeneous distribution of (super 26) Al and magnesium isotopes in the protoplanetary disk after an epoch of CAI formation. The inferred initial (super 26) Al/ (super 27) Al ratios of chondrules indicate that most chondrules formed 1-3 Ma after CAIs with the canonical (super 26) Al/ (super 27) Al ratio. Abstract Copyright The Meteoritical Society, 2013. JF - Meteoritics & Planetary Science AU - Kita, Noriko T AU - Yin, Qing-Zhu AU - MacPherson, Glenn J AU - Ushikubo, Takayuki AU - Jacobsen, Benjamin AU - Nagashima, Kazuhide AU - Kurahashi, Erika AU - Krot, Alexander N AU - Jacobsen, Stein B Y1 - 2013/08// PY - 2013 DA - August 2013 SP - 1383 EP - 1400 PB - Meteoritical Society, Fayetteville, AR VL - 48 IS - 8 SN - 1086-9379, 1086-9379 KW - magnesium KW - stony meteorites KW - ion probe data KW - isotopes KW - refractory materials KW - calcium-aluminum inclusions KW - Mg-26 KW - mass spectra KW - Acfer 094 KW - CV chondrites KW - protoplanetary disk KW - stable isotopes KW - CO chondrites KW - meteorites KW - Al-26 KW - radioactive isotopes KW - CR chondrites KW - aluminum KW - inclusions KW - amoeboid olivine aggregates KW - Al-27/Al-26 KW - spectra KW - heterogeneity KW - chondrites KW - alkaline earth metals KW - isotope ratios KW - Acfer Meteorites KW - carbonaceous chondrites KW - early solar system KW - ICP mass spectra KW - Mg-26/Mg-24 KW - metals KW - chondrules KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1438968091?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=%28super+26%29+Al-+%28super+26%29+Mg+isotope+systematics+of+the+first+solids+in+the+early+solar+system&rft.au=Kita%2C+Noriko+T%3BYin%2C+Qing-Zhu%3BMacPherson%2C+Glenn+J%3BUshikubo%2C+Takayuki%3BJacobsen%2C+Benjamin%3BNagashima%2C+Kazuhide%3BKurahashi%2C+Erika%3BKrot%2C+Alexander+N%3BJacobsen%2C+Stein+B&rft.aulast=Kita&rft.aufirst=Noriko&rft.date=2013-08-01&rft.volume=48&rft.issue=8&rft.spage=1383&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12141 L2 - http://cavern.uark.edu/~meteor/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 99 N1 - PubXState - AR N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-10-03 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - Acfer 094; Acfer Meteorites; Al-26; Al-27/Al-26; alkaline earth metals; aluminum; amoeboid olivine aggregates; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; chondrules; CO chondrites; CR chondrites; CV chondrites; early solar system; heterogeneity; ICP mass spectra; inclusions; ion probe data; isotope ratios; isotopes; magnesium; mass spectra; metals; meteorites; Mg-26; Mg-26/Mg-24; protoplanetary disk; radioactive isotopes; refractory materials; spectra; stable isotopes; stony meteorites DO - http://dx.doi.org/10.1111/maps.12141 ER - TY - JOUR T1 - Sensitivity of CAM5-Simulated Arctic Clouds and Radiation to Ice Nucleation Parameterization AN - 1434019805; 18450348 AB - Sensitivity of Arctic clouds and radiation in the Community Atmospheric Model, version 5, to the ice nucleation process is examined by testing a new physically based ice nucleation scheme that links the variation of ice nuclei (IN) number concentration to aerosol properties. The default scheme parameterizes the IN concentration simply as a function of ice supersaturation. The new scheme leads to a significant reduction in simulated IN concentration at all latitudes while changes in cloud amounts and properties are mainly seen at high- and midlatitude storm tracks. In the Arctic, there is a considerable increase in midlevel clouds and a decrease in low-level clouds, which result from the complex interaction among the cloud macrophysics, microphysics, and large-scale environment. The smaller IN concentrations result in an increase in liquid water path and a decrease in ice water path caused by the slowdown of the Bergeron-Findeisen process in mixed-phase clouds. Overall, there is an increase in the optical depth of Arctic clouds, which leads to a stronger cloud radiative forcing (net cooling) at the top of the atmosphere. The comparison with satellite data shows that the new scheme slightly improves low-level cloud simulations over most of the Arctic but produces too many midlevel clouds. Considerable improvements are seen in the simulated low-level clouds and their properties when compared with Arctic ground-based measurements. Issues with the observations and the model-observation comparison in the Arctic region are discussed. JF - Journal of Climate AU - Xie, Shaocheng AU - Liu, Xiaohong AU - Zhao, Chuanfeng AU - Zhang, Yuying AD - Lawrence Livermore National Laboratory, Livermore, California Y1 - 2013/08// PY - 2013 DA - August 2013 SP - 5981 EP - 5999 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 26 IS - 16 SN - 0894-8755, 0894-8755 KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Supersaturation KW - Climate change KW - Model Testing KW - Storms KW - Nucleation KW - Radiative forcing KW - Radiation KW - Cloud amount KW - Arctic KW - Extratropical cyclones KW - Marine KW - Aerosols KW - Ice nuclei KW - Climates KW - Model Studies KW - PN, Arctic KW - Clouds KW - Sea ice KW - Numerical simulations KW - Atmospheric forcing KW - Arctic clouds KW - Aerosol properties KW - Ice nucleation KW - Q2 09243:Structure, mechanics and thermodynamics KW - AQ 00006:Sewage KW - M2 551.58:Climatology (551.58) KW - SW 0820:Snow, ice and frost UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434019805?accountid=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=Sensitivity+of+CAM5-Simulated+Arctic+Clouds+and+Radiation+to+Ice+Nucleation+Parameterization&rft.au=Xie%2C+Shaocheng%3BLiu%2C+Xiaohong%3BZhao%2C+Chuanfeng%3BZhang%2C+Yuying&rft.aulast=Xie&rft.aufirst=Shaocheng&rft.date=2013-08-01&rft.volume=26&rft.issue=16&rft.spage=5981&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-12-00517.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 66 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Clouds; Supersaturation; Aerosols; Sea ice; Ice nuclei; Atmospheric forcing; Climate change; Radiative forcing; Numerical simulations; Radiation; Cloud amount; Aerosol properties; Arctic clouds; Ice nucleation; Extratropical cyclones; Nucleation; Climates; Model Testing; Storms; Arctic; Model Studies; PN, Arctic; Marine DO - http://dx.doi.org/10.1175/JCLI-D-12-00517.1 ER - TY - JOUR T1 - Insights from ScS-S measurements on deep mantle attenuation AN - 1464884878; 2013-090944 AB - We apply a recently developed method based on the instantaneous frequency to analyze broadband seismic data recorded by the transportable USArray. We measure in the frequency band [0.018-0.2]Hz about 700 high-quality differential ScS-S anelastic delay times, delta t* (sub ScS-S) , sampling the mantle below Central America and below Alaska that we compare to elastic delay times, delta t (sub ScS-S) , obtained by cross-correlating the S and ScS signals. We confirm that the instantaneous frequency matching method is more robust than the classical spectral ratio method. By a series of careful analyses of the effects of signal-to-noise ratio, source mechanism characteristics and possible phase interferences on measurements of differential anelastic delay times, we demonstrate that in order to obtain accurate values of delta t* (sub ScS-S) the seismic records must be rigorously selected. In spite of the limited number of data that satisfy our quality criteria, we recover, using an additional stacking procedure, a clear dependence of delta t* (sub ScS-S) on the epicentral distance in the two regions. The absence of correlation between the obtained anelastic and elastic delay-times indicates a complex compositional-thermal origin of the attenuation structure, or effects of scattering by small scale structure, in accordance with possible presence of subducted material. The regional 1-D inversions of our measurements indicate a non-uniform lower mantle attenuation structure: a zone with high attenuation in the mid-lower mantle (Q (sub mu ) nearly equal 250) and a low attenuation layer at its base (Q (sub mu ) nearly equal 450). A comparison of our results with low-frequency normal-model Q models is consistent with frequency-dependent attenuation with Q (sub mu ) Kappa omega (super alpha ) and alpha =0.1-0.2 (i.e. less attenuation at higher frequencies), although possible effects of lateral variations in Q in the deep mantle add some uncertainty to these values. Abstract Copyright (2013) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Durand, S AU - Matas, J AU - Ford, S AU - Ricard, Y AU - Romanowicz, B AU - Montagner, J P Y1 - 2013/07/15/ PY - 2013 DA - 2013 Jul 15 SP - 101 EP - 110 PB - Elsevier, Amsterdam VL - 374 SN - 0012-821X, 0012-821X KW - United States KW - seismograms KW - body waves KW - USArray KW - ScS-waves KW - statistical analysis KW - mantle KW - elastic waves KW - frequency KW - noise KW - lower mantle KW - attenuation KW - Q KW - time factor KW - crosscorrelation KW - synthetic seismograms KW - signal-to-noise ratio KW - interference KW - Alaska KW - time delay KW - seismic waves KW - Central America KW - S-waves KW - 18:Solid-earth geophysics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1464884878?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Insights+from+ScS-S+measurements+on+deep+mantle+attenuation&rft.au=Durand%2C+S%3BMatas%2C+J%3BFord%2C+S%3BRicard%2C+Y%3BRomanowicz%2C+B%3BMontagner%2C+J+P&rft.aulast=Durand&rft.aufirst=S&rft.date=2013-07-15&rft.volume=374&rft.issue=&rft.spage=101&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2013.05.026 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 55 N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2013-12-05 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - Alaska; attenuation; body waves; Central America; crosscorrelation; elastic waves; frequency; interference; lower mantle; mantle; noise; Q; S-waves; ScS-waves; seismic waves; seismograms; signal-to-noise ratio; statistical analysis; synthetic seismograms; time delay; time factor; United States; USArray DO - http://dx.doi.org/10.1016/j.epsl.2013.05.026 ER - TY - JOUR T1 - 3rd international conference on Turbulent mixing and beyond AN - 1542638598; 2014-044821 JF - Physica Scripta Y1 - 2013/07// PY - 2013 DA - July 2013 EP - variously paginated PB - The=Swedish Academy of Sciences Kungl. Vetenskapsakademien, Stockholm VL - 2013 IS - T155 SN - 0031-8949, 0031-8949 KW - numerical models KW - symposia KW - mixing KW - turbulence KW - fluid dynamics KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542638598?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=Physica+Scripta&rft.atitle=3rd+international+conference+on+Turbulent+mixing+and+beyond&rft.au=&rft.aulast=&rft.aufirst=&rft.date=2013-07-01&rft.volume=2013&rft.issue=T155&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Physica+Scripta&rft.issn=00318949&rft_id=info:doi/10.1088%2F0031-8949%2F2013%2FT155%2F010301 L2 - http://iopscience.iop.org/1402-4896/ LA - English DB - GeoRef N1 - Conference title - 3rd international conference on Turbulent mixing and beyond N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2014-01-01 N1 - Document feature - illus. N1 - SuppNotes - Individual papers within scope are cited separately N1 - Last updated - 2014-07-04 N1 - SubjectsTermNotLitGenreText - fluid dynamics; mixing; numerical models; symposia; turbulence DO - http://dx.doi.org/10.1088/0031-8949/2013/T155/010301 ER - TY - JOUR T1 - Turbulence and fossil turbulence lead to life in the universe AN - 1542638433; 2014-044822 AB - Turbulence is defined as an eddy-like state of fluid motion where the inertial-vortex forces of the eddies are larger than all the other forces that tend to damp the eddies out. Fossil turbulence is a perturbation produced by turbulence that persists after the fluid ceases to be turbulent at the scale of the perturbation. Because vorticity is produced at small scales, turbulence must cascade from small scales to large, providing a consistent physical basis for Kolmogorovian universal similarity laws. Oceanic and astrophysical mixing and diffusion are dominated by fossil turbulence and fossil turbulent waves. Observations from space telescopes show turbulence and vorticity existed in the beginning of the universe and that their fossils persist. Fossils of big bang turbulence include spin and the dark matter of galaxies: clumps of approximately 10 (super 12) frozen hydrogen planets that make globular star clusters as seen by infrared and microwave space telescopes. When the planets were hot gas, they hosted the formation of life in a cosmic soup of hot-water oceans as they merged to form the first stars and chemicals. Because spontaneous life formation according to the standard cosmological model is virtually impossible, the existence of life falsifies the standard cosmological model. Copyright 2013 The Royal Swedish Academy of Sciences JF - Physica Scripta AU - Gibson, Carl H Y1 - 2013/07// PY - 2013 DA - July 2013 EP - Paper No. 014023 PB - The=Swedish Academy of Sciences Kungl. Vetenskapsakademien, Stockholm VL - 2013 IS - T155 SN - 0031-8949, 0031-8949 KW - globular clusters KW - galaxies KW - dark matter KW - astrobiology KW - turbulence KW - fluid dynamics KW - life origin KW - motions KW - mixing KW - water KW - diffusion KW - gaseous phase KW - extrasolar planets KW - telescope methods KW - biochemistry KW - cosmochemistry KW - vorticity KW - models KW - planets KW - Big Bang theory KW - stars KW - hydrogen KW - eddies KW - cosmology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542638433?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Physica+Scripta&rft.atitle=Turbulence+and+fossil+turbulence+lead+to+life+in+the+universe&rft.au=Gibson%2C+Carl+H&rft.aulast=Gibson&rft.aufirst=Carl&rft.date=2013-07-01&rft.volume=2013&rft.issue=T155&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Physica+Scripta&rft.issn=00318949&rft_id=info:doi/10.1088%2F0031-8949%2F2013%2FT155%2F014023 L2 - http://iopscience.iop.org/1402-4896/ LA - English DB - GeoRef N1 - Conference title - 3rd international conference on Turbulent mixing and beyond N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2014-01-01 N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2014-07-04 N1 - SubjectsTermNotLitGenreText - astrobiology; Big Bang theory; biochemistry; cosmochemistry; cosmology; dark matter; diffusion; eddies; extrasolar planets; fluid dynamics; galaxies; gaseous phase; globular clusters; hydrogen; life origin; mixing; models; motions; planets; stars; telescope methods; turbulence; vorticity; water DO - http://dx.doi.org/10.1088/0031-8949/2013/T155/014023 ER - TY - JOUR T1 - CO (sub 2) in the mantle; melting and solid-solid phase boundaries AN - 1429844949; 2013-069302 AB - The high temperature phase boundaries of CO (sub 2) in the proximity of the Earth's adiabat are determined using first-principles molecular dynamics simulations based on density functional theory. The melting curve, predicted here up to 71 GPa, and the molecular to polymeric solid phase transition are computed through a phase coexistence approach from free energy calculations. The resulting CO (sub 2) phase IV-phase V-liquid triple point is at 31.8 GPa and 1636 K, in excellent agreement with the available experimental data. The Earth's geotherm crosses into the non-molecular phase V near 40 GPa and 2160 K, indicating that free deposits of carbon dioxide in the lower mantle would exist as a polymeric solid. We have also examined the thermodynamic stability of phase V and find no indication of transformations into a dissociated diamond and oxygen phase at mantle conditions. Abstract Copyright (2013) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Teweldeberhan, A M AU - Boates, B AU - Bonev, S A Y1 - 2013/07/01/ PY - 2013 DA - 2013 Jul 01 SP - 228 EP - 232 PB - Elsevier, Amsterdam VL - 373 SN - 0012-821X, 0012-821X KW - pressure KW - oxygen KW - mantle KW - phase transitions KW - free energy KW - native elements KW - simulation KW - high pressure KW - triple junctions KW - temperature KW - carbon dioxide KW - ultrahigh pressure KW - solid phase KW - lower mantle KW - theoretical studies KW - plate tectonics KW - melting KW - phase equilibria KW - diamond KW - molecular dynamics KW - transformations KW - polymers KW - high temperature KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429844949?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=CO+%28sub+2%29+in+the+mantle%3B+melting+and+solid-solid+phase+boundaries&rft.au=Teweldeberhan%2C+A+M%3BBoates%2C+B%3BBonev%2C+S+A&rft.aulast=Teweldeberhan&rft.aufirst=A&rft.date=2013-07-01&rft.volume=373&rft.issue=&rft.spage=228&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2013.05.008 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 49 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2013-09-05 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - carbon dioxide; diamond; free energy; high pressure; high temperature; lower mantle; mantle; melting; molecular dynamics; native elements; oxygen; phase equilibria; phase transitions; plate tectonics; polymers; pressure; simulation; solid phase; temperature; theoretical studies; transformations; triple junctions; ultrahigh pressure DO - http://dx.doi.org/10.1016/j.epsl.2013.05.008 ER - TY - JOUR T1 - RADIATION SAFETY ASPECTS OF NANOTECHNOLOGY: UPDATE ON DEVELOPMENT OF AN NCRP COMMENTARY AN - 1412552105; 18229202 AB - The National Council on Radiation Protection and Measurements (NCRP) has established NCRP Scientific Committee 2-6 to develop a commentary on the current state of knowledge and guidance for radiation safety programs involved with nanotechnology. NCRP originated in 1929 and was congressionally chartered in 1964 under U.S. Public Law 88-376 as a not-for-profit service organization to serve in the nation's public interest for collecting, analyzing, and disseminating the latest scientific information about radiation protection and measurement. NCRP cooperates with national and international governmental and private organizations to facilitate the effective use of combined resources to further develop the basic concepts of radiation protection and measurement. Areas of interest for the commentary include programs where radiation is being used to characterize or alter materials at the nanoscale level, radiolabelling of nanomaterials for tracking or evaluation of physicochemical and biological behavior, and the use of nano-formulated materials in situations involving radiation or radioactivity. The commentary's focus places strong emphasis on practical operational information for management, radiation safety officers, operational health physicists, dosimetrists, workers, and regulators. Information applicable to the radiation safety aspects of nanotechnology has been derived from studying naturally occurring nanoparticles, ultrafine aerosols of actinides, and aerosols from atmospheric testing. An analysis is being performed on how traditional health physics program practices may need to be modified to provide adequate safety for those working with radioactive nanomaterials and nanotechnology applications involving radiation. Knowledge gaps are being identified regarding information needed to implement a comprehensive and effective radiation safety program. The commentary intends to provide guidance on contamination control, engineered and administrative controls; personal protective equipment, including respiratory protection; performance of safety training; waste disposal; and emergency response. The commentary also intends to provide specific guidance on conducting internal dosimetry programs if nanomaterials are being handled. Possible differences in the biological uptake and in vivo dissolution or translocation of radioactive nanoparticles, compared to more commonly encountered micrometer-sized particles, may impact the design and conduct of internal monitoring programs and dose calculation methods. Model parameters and other considerations are being assessed including: how nanometer-sized particles are addressed in current respiratory tract and systemic biological models; deposition efficiency, total and regional retention patterns, and cells and tissues at risk; and the potential for multifactorial biological effects from radiation, chemical, and physical particle properties of the nanoparticles. Finally, it is intended that the approaches taken to develop the commentary will be an example to the broader nanotechnology knowledge infrastructure community on how to determine which information is relevant, and then to collect, validate, store, share, mine, analyze, model, and apply that information for the efficient use of future work in the area of nanotechnology safety. It is expected that preparation of the commentary will take about 12 months. JF - Health Physics AU - Hoover, M AU - Meyers, D AU - Cash, L AU - Guilmette, R AU - Kreyling, W AU - Oberdoerster, G AU - Smith, R AU - Boecker, B AD - National Institute for Occupational Safety and Health, Lawrence Livermore National Laboratory, Los Alamos National Laboratory, Lovelace Respiratory Research Institute, UK Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - 1 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 105 IS - 1 SN - 0017-9078, 0017-9078 KW - Pollution Abstracts; Health & Safety Science Abstracts KW - USA KW - Aerosols KW - Pollutant deposition KW - Safety engineering KW - Particulates KW - Radioactivity KW - Councils KW - Nanotechnology KW - Respiratory tract KW - Pollution control KW - P 0000:AIR POLLUTION KW - H 1000:Occupational Safety and Health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1412552105?accountid=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=Health+Physics&rft.atitle=RADIATION+SAFETY+ASPECTS+OF+NANOTECHNOLOGY%3A+UPDATE+ON+DEVELOPMENT+OF+AN+NCRP+COMMENTARY&rft.au=Hoover%2C+M%3BMeyers%2C+D%3BCash%2C+L%3BGuilmette%2C+R%3BKreyling%2C+W%3BOberdoerster%2C+G%3BSmith%2C+R%3BBoecker%2C+B&rft.aulast=Hoover&rft.aufirst=M&rft.date=2013-07-01&rft.volume=105&rft.issue=1&rft.spage=S15&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 - 2013-07-01 N1 - Last updated - 2013-08-12 N1 - SubjectsTermNotLitGenreText - Pollutant deposition; Aerosols; Safety engineering; Radioactivity; Particulates; Councils; Pollution control; Respiratory tract; Nanotechnology; USA ER - TY - JOUR T1 - Influence of oxic/anoxic fluctuations on ammonia oxidizers and nitrification potential in a wet tropical soil AN - 1399919734; 18199178 AB - Ammonia oxidation is a key process in the global nitrogen cycle. However, in tropical soils, little is known about ammonia-oxidizing microorganisms and how characteristically variable oxygen regimes affect their activity. We investigated the influence of brief anaerobic periods on ammonia oxidation along an elevation, moisture, and oxygen availability gradient in wet tropical soils. Soils from three forest types were incubated for up to 36 weeks in lab microcosms under three regimes: (1) static aerobic; (2) static anaerobic; and (3) fluctuating (aerobic/anaerobic). Nitrification potential was measured in field-fresh soils and incubated soils. The native ammonia-oxidizing community was also characterized, based on diversity assessments (clone libraries) and quantification of the ammonia monooxygenase alpha -subunit (amoA) gene. These relatively low pH soils appear to be dominated by ammonia-oxidizing archaea (AOA), and AOA communities in the three soil types differed significantly in their ability to oxidize ammonia. Soils from an intermediate elevation, and those incubated with fluctuating redox conditions, tended to have the highest nitrification potential following an influx of oxygen, although all soils retained the capacity to nitrify even after long anoxic periods. Together, these results suggest that wet tropical soil AOA are tolerant of extended periods of anoxia. JF - FEMS Microbiology Ecology AU - Pett-Ridge, Jennifer AU - Petersen, Dorthe G AU - Nuccio, Erin AU - Firestone, Mary K AD - Lawrence Livermore National Laboratory Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - 179 EP - 194 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 85 IS - 1 SN - 0168-6496, 0168-6496 KW - Ecology Abstracts; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Soil types KW - Archaea KW - Ammonia KW - Forests KW - Anoxia KW - Oxygen KW - amoA gene KW - Nitrification KW - Ammonia monooxygenase KW - Oxidation KW - Microorganisms KW - Nitrogen cycle KW - Microcosms KW - pH effects KW - D 04040:Ecosystem and Ecology Studies KW - A 01400:Soil Microbes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1399919734?accountid=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=FEMS+Microbiology+Ecology&rft.atitle=Influence+of+oxic%2Fanoxic+fluctuations+on+ammonia+oxidizers+and+nitrification+potential+in+a+wet+tropical+soil&rft.au=Pett-Ridge%2C+Jennifer%3BPetersen%2C+Dorthe+G%3BNuccio%2C+Erin%3BFirestone%2C+Mary+K&rft.aulast=Pett-Ridge&rft.aufirst=Jennifer&rft.date=2013-07-01&rft.volume=85&rft.issue=1&rft.spage=179&rft.isbn=&rft.btitle=&rft.title=FEMS+Microbiology+Ecology&rft.issn=01686496&rft_id=info:doi/10.1111%2F1574-6941.12111 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-07-01 N1 - Last updated - 2014-05-02 N1 - SubjectsTermNotLitGenreText - Soil types; Ammonia; Forests; Anoxia; Oxygen; amoA gene; Nitrification; Oxidation; Ammonia monooxygenase; Microorganisms; Nitrogen cycle; Microcosms; pH effects; Archaea DO - http://dx.doi.org/10.1111/1574-6941.12111 ER - TY - JOUR T1 - Dynamic topography change of the Eastern United States since 3 million years ago AN - 1429844624; 2013-069452 AB - Sedimentary rocks from Virginia through Florida record marine flooding during the mid-Pliocene. Several wave-cut scarps that at the time of deposition would have been horizontal are now draped over a warped surface with a maximum variation of 60 meters. We modeled dynamic topography by using mantle convection simulations that predict the amplitude and broad spatial distribution of this distortion. The results imply that dynamic topography and, to a lesser extent, glacial isostatic adjustment account for the current architecture of the coastal plain and proximal shelf. This confounds attempts to use regional stratigraphic relations as references for longer-term sea-level determinations. Inferences of Pliocene global sea-level heights or stability of Antarctic ice sheets therefore cannot be deciphered in the absence of an appropriate mantle dynamic reference frame. JF - Science AU - Rowley, David B AU - Forte, Alessandro M AU - Moucha, Robert AU - Mitrovica, Jerry X AU - Simmons, Nathan A AU - Grand, Stephen P Y1 - 2013/06/28/ PY - 2013 DA - 2013 Jun 28 SP - 1560 EP - 1563 PB - American Association for the Advancement of Science, Washington, DC VL - 340 IS - 6140 SN - 0036-8075, 0036-8075 KW - United States KW - continental margin KW - Quaternary KW - mantle KW - upper Pliocene KW - landforms KW - Eastern U.S. KW - convection KW - relief KW - flows KW - isostasy KW - Cenozoic KW - Tertiary KW - topography KW - dynamics KW - Neogene KW - surface features KW - Pliocene KW - crust KW - Atlantic Coastal Plain KW - 18:Solid-earth geophysics KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429844624?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Dynamic+topography+change+of+the+Eastern+United+States+since+3+million+years+ago&rft.au=Rowley%2C+David+B%3BForte%2C+Alessandro+M%3BMoucha%2C+Robert%3BMitrovica%2C+Jerry+X%3BSimmons%2C+Nathan+A%3BGrand%2C+Stephen+P&rft.aulast=Rowley&rft.aufirst=David&rft.date=2013-06-28&rft.volume=340&rft.issue=6140&rft.spage=1560&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1229180 L2 - http://www.sciencemag.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 42 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2013-09-05 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - Atlantic Coastal Plain; Cenozoic; continental margin; convection; crust; dynamics; Eastern U.S.; flows; isostasy; landforms; mantle; Neogene; Pliocene; Quaternary; relief; surface features; Tertiary; topography; United States; upper Pliocene DO - http://dx.doi.org/10.1126/science.1229180 ER - TY - JOUR T1 - Paleoseismic history of the Fallen Leaf segment of the West Tahoe-Dollar Point Fault reconstructed from slide deposits in the Lake Tahoe Basin, California-Nevada AN - 1400621090; 2013-057525 AB - The West Tahoe-Dollar Point fault (WTDPF) extends along the western margin of the Lake Tahoe Basin (northern Sierra Nevada, western United States) and is characterized as its most hazardous fault. Fallen Leaf Lake, Cascade Lake, and Emerald Bay are three subbasins of the Lake Tahoe Basin, located south of Lake Tahoe, and provide an opportunity to image primary earthquake deformation along the WTDPF and associated landslide deposits. Here we present results from high-resolution seismic Chirp (compressed high intensity radar pulse) surveys in Fallen Leaf Lake and Cascade Lake, multibeam bathymetry coverage of Fallen Leaf Lake, onshore Lidar (light detection and ranging) data for the southern Lake Tahoe Basin, and radiocarbon dates from piston cores in Fallen Leaf Lake and Emerald Bay. Slide deposits imaged beneath Fallen Leaf Lake appear to be synchronous with slides in Lake Tahoe, Emerald Bay, and Cascade Lake. The temporal correlation of slides between multiple basins suggests triggering by earthquakes on the WTDPF system. If this correlation is correct, we postulate a recurrence interval of approximately 3-4 k.y. for large earthquakes on the Fallen Leaf Lake segment of the WTDPF, and the time since the most recent event ( approximately 4.5 k.y. ago) exceeds this recurrence time. In addition, Chirp data beneath Cascade Lake image strands of the WTDPF offsetting the lake floor as much as approximately 7.5 m. The Cascade Lake data combined with onshore Lidar allow us to map the WTDPF continuously between Fallen Leaf Lake and Cascade Lake. This improved mapping of the WTDPF reveals the fault geometry and architecture south of Lake Tahoe and improves the geohazard assessment of the region. JF - Geosphere AU - Maloney, Jillian M AU - Noble, Paula J AU - Driscoll, Neal W AU - Kent, Graham M AU - Smith, Shane B AU - Schmauder, Gretchen C AU - Babcock, Jeffrey M AU - Baskin, Robert L AU - Karlin, Robert AU - Kell, Annie M AU - Seitz, Gordon G AU - Zimmerman, Susan AU - Kleppe, John A Y1 - 2013/06/26/ PY - 2013 DA - 2013 Jun 26 SP - 1065 EP - 1090 PB - Geological Society of America, Boulder, CO VL - 9 IS - 4 KW - United States KW - Sierra Nevada KW - lithostratigraphy KW - lake-level changes KW - seismic stratigraphy KW - paleoseismicity KW - geophysical surveys KW - debris flows KW - Holocene KW - cores KW - upper Pleistocene KW - Cenozoic KW - California KW - vertical seismic profiles KW - turbidite KW - bottom features KW - mass movements KW - sediments KW - storms KW - Nevada KW - faults KW - seismic profiles KW - Quaternary KW - geophysical methods KW - Cascade Lake KW - seismic methods KW - slumping KW - event stratigraphy KW - lacustrine environment KW - surveys KW - Pleistocene KW - geophysical profiles KW - bathymetry KW - West Tahoe-Dollar Point Fault KW - Lake Tahoe KW - lake sediments KW - Fallen Leaf Lake KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1400621090?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geosphere&rft.atitle=Paleoseismic+history+of+the+Fallen+Leaf+segment+of+the+West+Tahoe-Dollar+Point+Fault+reconstructed+from+slide+deposits+in+the+Lake+Tahoe+Basin%2C+California-Nevada&rft.au=Maloney%2C+Jillian+M%3BNoble%2C+Paula+J%3BDriscoll%2C+Neal+W%3BKent%2C+Graham+M%3BSmith%2C+Shane+B%3BSchmauder%2C+Gretchen+C%3BBabcock%2C+Jeffrey+M%3BBaskin%2C+Robert+L%3BKarlin%2C+Robert%3BKell%2C+Annie+M%3BSeitz%2C+Gordon+G%3BZimmerman%2C+Susan%3BKleppe%2C+John+A&rft.aulast=Maloney&rft.aufirst=Jillian&rft.date=2013-06-26&rft.volume=9&rft.issue=4&rft.spage=1065&rft.isbn=&rft.btitle=&rft.title=Geosphere&rft.issn=1553-040X&rft_id=info:doi/10.1130%2FGES00877.1 L2 - http://www.gsajournals.org/perlserv/?request=get-archive&issn=1553-040X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, 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 - 2013-01-01 N1 - Number of references - 47 N1 - PubXState - CO N1 - Document feature - illus. incl. sects., 2 tables, geol. sketch maps N1 - Last updated - 2013-08-15 N1 - SubjectsTermNotLitGenreText - bathymetry; bottom features; California; Cascade Lake; Cenozoic; cores; debris flows; event stratigraphy; Fallen Leaf Lake; faults; geophysical methods; geophysical profiles; geophysical surveys; Holocene; lacustrine environment; lake sediments; Lake Tahoe; lake-level changes; lithostratigraphy; mass movements; Nevada; paleoseismicity; Pleistocene; Quaternary; sediments; seismic methods; seismic profiles; seismic stratigraphy; Sierra Nevada; slumping; storms; surveys; turbidite; United States; upper Pleistocene; vertical seismic profiles; West Tahoe-Dollar Point Fault DO - http://dx.doi.org/10.1130/GES00877.1 ER - TY - CPAPER T1 - Sequential Threat Detection for Harbor Defense: An X-ray Physics-Based Bayesian Approach T2 - OCEANS 201313 MTS/IEEE Conference in Bergen AN - 1412147260; 6228672 JF - OCEANS 201313 MTS/IEEE Conference in Bergen AU - Candy, James Y1 - 2013/06/10/ PY - 2013 DA - 2013 Jun 10 KW - Bayesian analysis KW - Ionizing radiation KW - Harbors UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1412147260?accountid=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=OCEANS+201313+MTS%2FIEEE+Conference+in+Bergen&rft.atitle=Sequential+Threat+Detection+for+Harbor+Defense%3A+An+X-ray+Physics-Based+Bayesian+Approach&rft.au=Candy%2C+James&rft.aulast=Candy&rft.aufirst=James&rft.date=2013-06-10&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=OCEANS+201313+MTS%2FIEEE+Conference+in+Bergen&rft.issn=&rft_id=info:doi/ L2 - http://www.oceans13mtsieeebergen.org/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-06-30 N1 - Last updated - 2013-07-25 ER - TY - JOUR T1 - Kinetics of chlorite dissolution at elevated temperatures and CO (sub 2) conditions AN - 1429835224; 2013-067501 AB - Chlorite ((Mg (sub 4.29) Al (sub 1.48) Fe (sub 0.10) )(Al (sub 1.22) Si (sub 2.78) )O (sub 10) (OH) (sub 8) ) dissolution kinetics were measured under far from equilibrium conditions using a mixed-flow reactor over temperatures of 100-275 degrees C at pH values of 3.0-5.7 in a background solution matrix of 0.05 m NaCl. Over this temperature range, magnesium was released congruently with respect to silica. The effect of variable pCO (sub 2) levels representative of engineered geothermal systems with CO (sub 2) as a heat-exchanging fluid (CO (sub 2) -EGS) was explored by reacting chlorite with solutions containing a range of dissolved CO (sub 2) concentrations (0.1-0.5 M). The dissolution rate was insensitive to CO (sub 2(aq)) concentration, with dissolved CO (sub 2) apparently affecting dissolution only through increased acidity. Over this range of far-from-equilibrium experimental conditions of elevated temperature, mildly acidic to moderately neutral pH, and CO (sub 2(aq)) concentrations up to 0.5 M, Mg-rich chlorite dissolution can be described as a surface area-normalized rate equal to: rate=k (sub acid) [(exp-E (sub acid) /R) .1/T-1/298K)]a (sub H+) (super n) ,where the apparent acid rate constant at 25 degrees C is k (sub a) =10 (super -9.91) molm (super -2) s (super -1) , the reaction order n with respect to H (super +) (sub (aq)) is 0.49, and the activation energy for the acid mechanism is E=25.1 kJ mol (super -1) (this value is significantly lower than previous estimates). This chlorite dissolution rate equation can be used with reaction affinity terms and kinetic laws for other minerals to estimate the impact of geochemical alteration within CO (sub 2) -enhanced geothermal system operations or other higher-temperature subsurface systems. Over a 100-275 degrees C temperature range, chlorite is 2-5 orders of magnitude less reactive than has been previously predicted. Abstract Copyright (2013) Elsevier, B.V. JF - Chemical Geology AU - Smith, Megan M AU - Wolery, Thomas J AU - Carroll, Susan A Y1 - 2013/06/06/ PY - 2013 DA - 2013 Jun 06 SP - 1 EP - 8 PB - Elsevier, Amsterdam VL - 347 SN - 0009-2541, 0009-2541 KW - silicates KW - X-ray diffraction data KW - aqueous solutions KW - NMR spectra KW - fugacity KW - temperature KW - carbon dioxide KW - geothermal systems KW - chemical reactions KW - phase equilibria KW - spectra KW - chlorite group KW - kinetics KW - saline composition KW - pH KW - sodium chloride KW - experimental studies KW - solubility KW - TEM data KW - geothermal energy KW - chlorite KW - geothermal reservoirs KW - sheet silicates KW - crystal chemistry KW - high temperature KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429835224?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Kinetics+of+chlorite+dissolution+at+elevated+temperatures+and+CO+%28sub+2%29+conditions&rft.au=Smith%2C+Megan+M%3BWolery%2C+Thomas+J%3BCarroll%2C+Susan+A&rft.aulast=Smith&rft.aufirst=Megan&rft.date=2013-06-06&rft.volume=347&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2013.02.017 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 43 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2013-09-05 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - aqueous solutions; carbon dioxide; chemical reactions; chlorite; chlorite group; crystal chemistry; experimental studies; fugacity; geothermal energy; geothermal reservoirs; geothermal systems; high temperature; kinetics; NMR spectra; pH; phase equilibria; saline composition; sheet silicates; silicates; sodium chloride; solubility; spectra; TEM data; temperature; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.chemgeo.2013.02.017 ER - TY - JOUR T1 - Comparison between the United States and United Kingdom Criticality Safety Personnel Training Program Guidance AN - 1671542291; 18278210 AB - The discipline of criticality safety (CS) has been developed in order to maintain safety in operations where significant amounts of fissionable material are to be manipulated. The operation is assessed by an individual or team of CS practitioners and an operational safety envelope is developed. The envelope can consist of limits on materials (i.e. fissionable mass, reflectors, moderators etc.), geometry (i.e. spacing, volume, etc.), and/or prescribed operating procedures which uphold a level of safety for personnel and equipment involved. The following paper is an overview of the similarities and differences in guidance on training programs for CS personnel at United States (US) and United Kingdom (UK) laboratories. This work was performed under the auspices of Joint Working Group 30 of the Mutual Defence Agreement between the United States and United Kingdom. JF - Transactions of the American Nuclear Society AU - Wysong Andrew, R AD - Lawrence Livermore National Laboratory, 7000 East Avenue, L-360, Livermore, CA 94550 wysong1@llnl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 468 EP - 470 PB - American Nuclear Society, Inc. VL - 108 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 - Envelopes KW - Training KW - Personnel KW - Nuclear safety KW - Reflectors KW - UK KW - Moderators KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671542291?accountid=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=Comparison+between+the+United+States+and+United+Kingdom+Criticality+Safety+Personnel+Training+Program+Guidance&rft.au=Wysong+Andrew%2C+R&rft.aulast=Wysong+Andrew&rft.aufirst=R&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=468&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 - 2013-09-01 N1 - Number of references - 8 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Alloy Development for Advanced Inert-Matrix Nuclear Fuels AN - 1429877810; 18278192 AB - A metallic inert matrix nuclear fuel (IMF) concept is being investigated for potential use as an advanced ultrahigh burn-up nuclear fuel. The concept comprises a dispersion of fuel microspheres in a Zr-based alloy matrix.1 Dispersion-type metallic IMFs can provide a high tolerance for fission gases and irradiation dose while maintaining high fuel density and thermal conductivity. In addition, dispersion-type IMFs are ideal separable systems, allowing each component (actinide fuel, inert metallic matrix, cladding) to be studied separately prior to studying interactions in an integrated fuel form. Key to the development of alloy design for actinide fuels and metallic inert matrices is an understanding through structural characterization of the thermodynamics and kinetics of phase stability and evolution under both thermal and irradiation conditions. Here, we present results from as-cast, uranium-rich U-Zr and U-Mo alloys being considered as metallic fuels and Zr-based alloys being considered as the inert metallic matrix. We will also discuss preliminary data from heat-treated alloys. JF - Transactions of the American Nuclear Society AU - McKeown Joseph, T AU - Ahn, Sangjoon AU - Barnhart, Brian AU - Irukuvarghula, Sandeep AU - Wall, Mark AU - Hsiung Luke, L AU - Mcdeavitt, Sean AU - Turchi Patrice, E A AD - Condensed Matter and Materials Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550 Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 399 EP - 400 PB - American Nuclear Society, Inc. VL - 108 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 - Zirconium base alloys KW - Heat treatment KW - Inert KW - Alloy development KW - Irradiation KW - Fuels KW - Nuclear fuels KW - Actinides UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429877810?accountid=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=Alloy+Development+for+Advanced+Inert-Matrix+Nuclear+Fuels&rft.au=McKeown+Joseph%2C+T%3BAhn%2C+Sangjoon%3BBarnhart%2C+Brian%3BIrukuvarghula%2C+Sandeep%3BWall%2C+Mark%3BHsiung+Luke%2C+L%3BMcdeavitt%2C+Sean%3BTurchi+Patrice%2C+E+A&rft.aulast=McKeown+Joseph&rft.aufirst=T&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=399&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 - 2013-09-01 N1 - Number of references - 4 N1 - Last updated - 2013-09-05 ER - TY - JOUR T1 - COG Preliminary Results for a SILENE Criticality Excursion Benchmark Experiment AN - 1429867625; 18278208 AB - As part of a joint effort between the US DOE Nuclear Criticality Safety Program (NCSP) and France, a series of neutron pulse experiments was performed in October 2010 at the Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA) Valduc SILENE reactor in France, to provide measurement data for simulating criticality accidents, and to provide data for radiation transport code validation. During these experiments, about one hundred neutron activation foils and sixty thermoluminescent dosimeters (TLDs) were utilized to obtain data for the first criticality accident alarm system (CAAS)/shielding benchmark for future publication in the International Criticality Safety Benchmark Evaluation Project (ICSBEP) handbook. The purpose of this paper is to present preliminary COG simulation results and comparisons to the foil and TLD measurement data of the first neutron pulse experiment. JF - Transactions of the American Nuclear Society AU - Kim, Soon AU - Heinrichs, David AU - Buck, Rich AU - Lent, Ed AU - Lee, Chuck AD - Lawrence Livermore National Laboratory, P O Box 808, Livermore, CA 94550 kim53@llnl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 463 EP - 465 PB - American Nuclear Society, Inc. VL - 108 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 - Activation KW - Accidents KW - Nuclear safety KW - Simulation KW - Benchmarking KW - Foils KW - Cog KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429867625?accountid=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=COG+Preliminary+Results+for+a+SILENE+Criticality+Excursion+Benchmark+Experiment&rft.au=Kim%2C+Soon%3BHeinrichs%2C+David%3BBuck%2C+Rich%3BLent%2C+Ed%3BLee%2C+Chuck&rft.aulast=Kim&rft.aufirst=Soon&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=463&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 - 2013-09-01 N1 - Number of references - 6 N1 - Last updated - 2013-09-05 ER - TY - JOUR T1 - MANAGING NIF SAFETY EQUIPMENT IN A HIGH NEUTRON AND GAMMA RADIATION ENVIRONMENT AN - 1419368894; 18130322 AB - The National Ignition Facility (NIF) is a 192 laser beam facility that supports the Inertial Confinement Fusion program. During the ignition experimental campaign, the NIF is expected to perform shots with varying fusion yield producing 14 MeV neutrons up to 20 MJ or 7.1 x 10 super(18) neutrons per shot and a maximum annual yield of 1,200 MJ. Several infrastructure support systems will be exposed to varying high yield shots over the facility's 30-y life span. In response to this potential exposure, analysis and testing of several facility safety systems have been conducted. A detailed MCNP (Monte Carlo N-Particle Transport Code) model has been developed for the NIF facility, and it includes most of the major structures inside the Target Bay. The model has been used in the simulation of expected neutron and gamma fluences throughout the Target Bay. Radiation susceptible components were identified and tested to fluences greater than 10 super(13) (n cm super(-2)) for 14 MeV neutrons and gamma -ray equivalent The testing includes component irradiation using a Co gamma source and accelerator-based irradiation using 4- and 14- MeV neutron sources. The subsystem implementation in the facility is based on the fluence estimates after shielding and survivabiUty guidelines derived from the dose maps and component tests results. This paper reports on the evaluation and implementation of mitigations for several infrastructure safety support systems, including video, oxygen monitoring, pressure monitors, water sensing systems, and access control interfaces found at the NIF. JF - Health Physics AU - Datte, P AU - Eckart, M AU - Jackson, M AU - Khater, H AU - Manuel, S AU - Newton, M AD - L-440, Lawrence Livermore National Laboratory, Livermore, CA 94551-9900, USA, Datte1@llnl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 589 EP - 596 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 104 IS - 6 SN - 0017-9078, 0017-9078 KW - Health & Safety Science Abstracts KW - Guidelines KW - Infrastructure KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1419368894?accountid=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=MANAGING+NIF+SAFETY+EQUIPMENT+IN+A+HIGH+NEUTRON+AND+GAMMA+RADIATION+ENVIRONMENT&rft.au=Datte%2C+P%3BEckart%2C+M%3BJackson%2C+M%3BKhater%2C+H%3BManuel%2C+S%3BNewton%2C+M&rft.aulast=Datte&rft.aufirst=P&rft.date=2013-06-01&rft.volume=104&rft.issue=6&rft.spage=589&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/10.1097%2FHP.0b013e31828d0156 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-08-01 N1 - Last updated - 2014-03-10 N1 - SubjectsTermNotLitGenreText - Infrastructure DO - http://dx.doi.org/10.1097/HP.0b013e31828d0156 ER - TY - JOUR T1 - Roles of Information Technology in Nuclear Criticality Safety Training AN - 1419367392; 18278213 AB - For many years, the nuclear criticality safety (NCS) community has recognized the urgent need to develop a criticality safety workforce to meet the country's nuclear operations support requirements. While there are many causes for the current workforce shortage problem, the retirement of many experienced personnel from NCS has exacerbated the situation. The Department of Energy (DOE) Nuclear Criticality Safety Program (NCSP) has established a website (http://ncsp.llnl.gov) to assist newcomers to this field. Among other things, the DOE NCSP website offers a series of nuclear criticality safety engineer training (NCSET) modules to assist various DOE sites in training nuclear criticality safety engineers. For years, this section of the website has attracted many users worldwide, and records more than eight thousand downloads of the modules per year. JF - Transactions of the American Nuclear Society AU - Huang, S AU - Lee, M AU - Morman, J AU - Goold, R AU - Lee, C AU - Heinrichs, D AD - Lawrence Livermore National Laboratory, P O Box 808, Livermore, CA 94550, USA, huang3@llnl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 477 EP - 479 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Health & Safety Science Abstracts KW - Training KW - Nuclear energy KW - Information technology KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1419367392?accountid=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=Roles+of+Information+Technology+in+Nuclear+Criticality+Safety+Training&rft.au=Huang%2C+S%3BLee%2C+M%3BMorman%2C+J%3BGoold%2C+R%3BLee%2C+C%3BHeinrichs%2C+D&rft.aulast=Huang&rft.aufirst=S&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=477&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 - 2013-08-01 N1 - Number of references - 1 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Training; Information technology; Nuclear energy ER - TY - JOUR T1 - Heterogeneous distribution of (super 26) Al at the birth of the solar system; evidence from corundum-bearing refractory inclusions in carbonaceous chondrites AN - 1400619970; 2013-053775 AB - We report on the mineralogy, petrology, and in situ oxygen- and magnesium-isotope measurements using secondary ion mass spectrometry of 10 corundum-bearing calcium-aluminum-rich inclusions (CAIs) from the Adelaide (ungrouped), Murray and Murchison (CM) carbonaceous chondrites. We also measured in situ oxygen-isotope compositions of several isolated corundum grains in the matrices of Murray and Murchison. Most of the corundum-bearing objects studied are uniformly (super 16) O-rich [Delta (super 17) O values range from -17 ppm to -28 ppm (2sigma =+ or -2.5 ppm) (Delta (super 17) O (sub avr) =-23+ or -5 ppm)], suggesting that they formed in a (super 16) O-rich gas of approximately solar composition and largely avoided subsequent thermal processing in an (super 16) O-poor gaseous reservoir. There is a large spread of the initial (super 26) Al/ (super 27) Al ratio [( (super 26) Al/ (super 27) Al) (sub 0) ] in the corundum-bearing CAIs. Two Adelaide CAIs show no resolvable excess of radiogenic (super 26) Mg (delta (super 26) Mg (super *) ): the inferred ( (super 26) Al/ (super 27) Al) (sub 0) are (0.6+ or -2.0)X10 (super -6) and (-0.9+ or -1.2)X10 (super -6) , respectively. Slopes of the model (super 26) Al- (super 26) Mg isochrons in five CAIs from Murray and Murchison are (4.4+ or -0.2)X10 (super -5) , (3.3+ or -0.3)X10 (super -5) , (4.1+ or -0.3)X10 (super -5) , (3.9+ or -0.4)X10 (super -5) , and (4.0+ or -2.0)X10 (super -6) , respectively. These values are lower than the canonical ( (super 26) Al/ (super 27) Al) (sub 0) ratio of (5.23+ or -0.13)X10 (super -5) inferred from the whole-rock magnesium-isotope measurements of the CV CAIs, but similar to the ( (super 26) Al/ (super 27) Al) (sub 0) ratio of (4.1+ or -0.2)X10 (super -5) in the corundum-bearing CAI F5 from Murray. Five other previously studied corundum-bearing CAIs from Acfer 094 (ungrouped) and CM carbonaceous chondrites showed no resolvable delta (super 26) Mg (super *) . We conclude that the corundum-bearing CAIs, as well as the solar corundum grains from matrices and acid-resistant residues of unequilibrated ordinary and carbonaceous chondrites, recorded heterogeneous distribution of (super 26) Al in the Solar System during an epoch of CAI formation. The (super 26) Al-rich and (super 26) Al-poor corundum-bearing CAIs and solar corundum grains represent different generations of refractory objects formed during this epoch. As a result, its duration cannot be inferred from (super 26) Al- (super 26) Mg systematics of CAIs. Oxygen-isotope composition of the protoplanetary disk was probably heterogeneous during this time reflecting either initial differences in oxygen isotopic compositions of the solid and gaseous reservoirs in the early Solar System or rapid isotopic evolution of these reservoirs in the protoplanetary disk with time. We suggest that (super 26) Al was injected into the protosolar molecular cloud core, possibly by a wind from a neighboring massive star or by or a low-mass asymptotic giant branch star, prior to formation of CAIs and refractory grains, and was subsequently homogenized through the protoplanetary disk by radial mixing. Abstract Copyright (2013) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Makide, Kentaro AU - Nagashima, Kazuhide AU - Krot, Alexander N AU - Huss, Gary R AU - Hutcheon, Ian D AU - Hellebrand, Eric AU - Petaev, Michail I Y1 - 2013/06/01/ PY - 2013 DA - 2013 Jun 01 SP - 190 EP - 215 PB - Elsevier, New York, NY VL - 110 SN - 0016-7037, 0016-7037 KW - magnesium KW - stony meteorites KW - oxygen KW - isotopes KW - refractory materials KW - Murray Meteorite KW - corundum KW - stable isotopes KW - Murchison Meteorite KW - electron probe data KW - meteorites KW - Al-26 KW - radioactive isotopes KW - mineral composition KW - aluminum KW - inclusions KW - oxides KW - Al-27/Al-26 KW - chondrites KW - chemical composition KW - solar system KW - alkaline earth metals KW - textures KW - isotope ratios KW - cosmochemistry KW - O-18/O-16 KW - carbonaceous chondrites KW - early solar system KW - mineral inclusions KW - Adelaide Meteorite KW - metals KW - CM chondrites KW - crystal chemistry KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1400619970?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Heterogeneous+distribution+of+%28super+26%29+Al+at+the+birth+of+the+solar+system%3B+evidence+from+corundum-bearing+refractory+inclusions+in+carbonaceous+chondrites&rft.au=Makide%2C+Kentaro%3BNagashima%2C+Kazuhide%3BKrot%2C+Alexander+N%3BHuss%2C+Gary+R%3BHutcheon%2C+Ian+D%3BHellebrand%2C+Eric%3BPetaev%2C+Michail+I&rft.aulast=Makide&rft.aufirst=Kentaro&rft.date=2013-06-01&rft.volume=110&rft.issue=&rft.spage=190&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2013.01.028 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 56 N1 - PubXState - NY N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-07-18 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - Adelaide Meteorite; Al-26; Al-27/Al-26; alkaline earth metals; aluminum; carbonaceous chondrites; chemical composition; chondrites; CM chondrites; corundum; cosmochemistry; crystal chemistry; early solar system; electron probe data; inclusions; isotope ratios; isotopes; magnesium; metals; meteorites; mineral composition; mineral inclusions; Murchison Meteorite; Murray Meteorite; O-18/O-16; oxides; oxygen; radioactive isotopes; refractory materials; solar system; stable isotopes; stony meteorites; textures DO - http://dx.doi.org/10.1016/j.gca.2013.01.028 ER - TY - JOUR T1 - Simulation of explosion ground motions using a hydrodynamic-to-elastic coupling approach in three dimensions AN - 1400616215; 2013-054231 AB - Near-field ground motions from explosions are governed by hydrodynamics and nonlinear material response. However, the calculation of the response using hydrodynamic solvers to observational distances, where motions are elastic, is computationally challenging. In order to propagate explosion ground motions from the near-source region to the far field, we developed a hybrid modeling approach with a hydrodynamic-to-elastic coupling in three dimensions. Near-source motions are computed with a Eulerian hydrodynamics code with adaptive mesh refinement. Motions on a dense grid of points are saved, resampled, and then passed to an elastic finite-difference code for seismic-wave modeling. Our coupling strategy is based on the uniqueness theorem, where motions are introduced into the elastic code as time-dependent boundary sources and propagate as elastic waves at much lower computational cost than with the hydrodynamics code. We developed and verified the methodology to compute the hydrodynamic responses in either 2D or 3D into the elastic region and pass these to the elastic solver as 3D boundary motions. The accuracy of the numerical calculations and the coupling strategy is demonstrated in cases with a purely elastic medium as well as a nonlinear medium. Importantly, we show that our hydrodynamics code can accurately model motions for shallow sources in an elastic medium including surface waves, which is essential to insure that near-source motions are correct. An application of our hybrid modeling approach is shown for a problem with scattering by 3D heterogeneity. Our strategy is capable of incorporating complex nonlinear effects near the source as well as volumetric and topographic material heterogeneity along the propagation path to receiver, making it very powerful for modeling a wide variety of effects and providing new prospects for modeling and understanding explosion-generated seismic waveforms. JF - Bulletin of the Seismological Society of America AU - Xu, Heming AU - Rodgers, Arthur J AU - Lomov, Ilya N AU - Petersson, N Anders AU - Sjogreen, Bjorn AU - Vorobiev, Oleg Y Y1 - 2013/06// PY - 2013 DA - June 2013 SP - 1629 EP - 1639 PB - Seismological Society of America, Berkeley, CA VL - 103 IS - 3 SN - 0037-1106, 0037-1106 KW - elasticity KW - three-dimensional models KW - explosions KW - ground motion KW - elastic waves KW - seismic waves KW - nuclear explosions KW - heterogeneity KW - simulation KW - earthquakes KW - two-dimensional models KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1400616215?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Simulation+of+explosion+ground+motions+using+a+hydrodynamic-to-elastic+coupling+approach+in+three+dimensions&rft.au=Xu%2C+Heming%3BRodgers%2C+Arthur+J%3BLomov%2C+Ilya+N%3BPetersson%2C+N+Anders%3BSjogreen%2C+Bjorn%3BVorobiev%2C+Oleg+Y&rft.aulast=Xu&rft.aufirst=Heming&rft.date=2013-06-01&rft.volume=103&rft.issue=3&rft.spage=1629&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120120180 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 52 N1 - PubXState - CA N1 - Document feature - illus. N1 - Last updated - 2013-07-18 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - earthquakes; elastic waves; elasticity; explosions; ground motion; heterogeneity; nuclear explosions; seismic waves; simulation; three-dimensional models; two-dimensional models DO - http://dx.doi.org/10.1785/0120120180 ER - TY - JOUR T1 - TRITIUM AND IGNITION TARGET MANAGEMENT AT THE NATIONAL IGNITION FACILITY AN - 1372057169; 18130320 AB - Isotopic mixtures of hydrogen constitute the basic fuel for fusion targets of the National Ignition Facility (NIF). A typical NIF fusion target shot requires approximately 0.5 mmoles of hydrogen gas and as much as 750 GBq (20 Ci) of super(3)H. Isotopic mix ratios are specified according to the experimental shot/test plan and the associated test objectives. The hydrogen isotopic concentrations, absolute amounts, gas purity, configuration of the target, and the physical configuration of the NIF facility are all parameters and conditions that must be managed to ensure the quality and safety of operations. An essential and key step in the preparation of an ignition target is the formation of a similar to 60 mu m thick hydrogen "ice" layer on the inner surface of the target capsule. The Cryogenic Target Positioning System (Cryo-Tarpos) provides gas handling, cyro-cooling, x-ray imaging systems, and related instrumentation to control the volumes and temperatures of the multiphase (solid, liquid, and gas) hydrogen as the gas is condensed to liquid, admitted to the capsule, and frozen as a single spherical crystal of hydrogen in the capsule. The hydrogen fuel gas is prepared in discrete 1.7 cc aliquots in the LLNL Tritium Facility for each ignition shot. Post-shot hydrogen gas is recovered in the NIF Tritium Processing System (TPS). Gas handling systems, instrumentation and analytic equipment, material accounting information systems, and the shot planning systems must work together to ensure that operational and safety requirements are met. JF - Health Physics AU - Draggoo, V AD - L-462, Lawrence Livermore National Laboratory, Livermore, CA 94551-9900, USA, draggoo1@llnl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 571 EP - 579 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 104 IS - 6 SN - 0017-9078, 0017-9078 KW - Health & Safety Science Abstracts KW - Accounting KW - Hydrogen KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1372057169?accountid=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=TRITIUM+AND+IGNITION+TARGET+MANAGEMENT+AT+THE+NATIONAL+IGNITION+FACILITY&rft.au=Draggoo%2C+V&rft.aulast=Draggoo&rft.aufirst=V&rft.date=2013-06-01&rft.volume=104&rft.issue=6&rft.spage=571&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/10.1097%2FHP.0b013e31828cfd17 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-06-01 N1 - Last updated - 2014-03-10 N1 - SubjectsTermNotLitGenreText - Hydrogen DO - http://dx.doi.org/10.1097/HP.0b013e31828cfd17 ER - TY - JOUR T1 - Persistence and origin of the lunar core dynamo AN - 1718054121; 2015-095422 AB - The lifetime of the ancient lunar core dynamo has implications for its power source and the mechanism of field generation. Here, we report analyses of two 3.56-Gy-old mare basalts demonstrating that they were magnetized in a stable and surprisingly intense dynamo magnetic field of at least nearly equal 13 mu T. These data extend the known lifetime of the lunar dynamo by nearly equal 160 My and indicate that the field was likely continuously active until well after the final large basin-forming impact. This likely excludes impact-driven changes in rotation rate as the source of the dynamo at this time in lunar history. Rather, our results require a persistent power source like precession of the lunar mantle or a compositional convection dynamo. JF - Proceedings of the National Academy of Sciences of the United States of America AU - Suavet, Clement AU - Weiss, Benjamin P AU - Cassata, William S AU - Shuster, David L AU - Gattacceca, Jerome AU - Chan, Lindsey AU - Garrick-Bethell, Ian AU - Head, James W AU - Grove, Timothy L AU - Fuller, Michael D Y1 - 2013/05/21/ PY - 2013 DA - 2013 May 21 SP - 8453 EP - 8458 PB - National Academy of Sciences, Washington, DC VL - 110 IS - 21 SN - 0027-8424, 0027-8424 KW - isotopes KW - igneous rocks KW - Sample 10049 KW - intensity KW - magnetization KW - Apollo Program KW - stable isotopes KW - magnetic field KW - lunar craters KW - temperature KW - electron probe data KW - Ar-40/Ar-39 KW - motions KW - radioactive isotopes KW - remanent magnetization KW - rotation KW - noble gases KW - cooling KW - thermochronology KW - Ar-38/Ar-37 KW - libration KW - Moon KW - isotope ratios KW - dynamos KW - alkali metals KW - rates KW - paleomagnetism KW - natural remanent magnetization KW - impacts KW - Imbrian KW - size KW - Sample 10017 KW - argon KW - viscous remanent magnetization KW - genesis KW - Sample 12002 KW - lunar samples KW - metals KW - potassium KW - Apollo 11 KW - crystallization KW - core KW - mare basalts KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054121?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.atitle=Persistence+and+origin+of+the+lunar+core+dynamo&rft.au=Suavet%2C+Clement%3BWeiss%2C+Benjamin+P%3BCassata%2C+William+S%3BShuster%2C+David+L%3BGattacceca%2C+Jerome%3BChan%2C+Lindsey%3BGarrick-Bethell%2C+Ian%3BHead%2C+James+W%3BGrove%2C+Timothy+L%3BFuller%2C+Michael+D&rft.aulast=Suavet&rft.aufirst=Clement&rft.date=2013-05-21&rft.volume=110&rft.issue=21&rft.spage=8453&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.issn=00278424&rft_id=info:doi/10.1073%2Fpnas.1300341110 L2 - http://www.pnas.org/content/by/year LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 48 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-10-01 N1 - CODEN - PNASA6 N1 - SubjectsTermNotLitGenreText - alkali metals; Apollo 11; Apollo Program; Ar-38/Ar-37; Ar-40/Ar-39; argon; cooling; core; crystallization; dynamos; electron probe data; genesis; igneous rocks; Imbrian; impacts; intensity; isotope ratios; isotopes; libration; lunar craters; lunar samples; magnetic field; magnetization; mare basalts; metals; Moon; motions; natural remanent magnetization; noble gases; paleomagnetism; potassium; radioactive isotopes; rates; remanent magnetization; rotation; Sample 10017; Sample 10049; Sample 12002; size; stable isotopes; temperature; thermochronology; viscous remanent magnetization DO - http://dx.doi.org/10.1073/pnas.1300341110 ER - TY - JOUR T1 - Permeability of wellbore-cement fractures following degradation by carbonated brine AN - 1832609202; 723787-12 AB - Fractures in wellbore cement and along wellbore-cement/host-rock interfaces have been identified as potential leakage pathways from long-term carbon sequestration sites. When exposed to carbon-dioxide-rich brines, the alkaline cement undergoes a series of reactions that form distinctive fronts adjacent to the cement surface. However, quantifying the effect of these reactions on fracture permeability is not solely a question of geochemistry, as the reaction zones also change the cement's mechanical properties, modifying the fracture geometry as a result. This paper describes how these geochemical and geomechanical processes affect fracture permeability in wellbore cement. These competing influences are discussed in light of data from a core-flood experiment conducted under carbon sequestration conditions: reaction chemistry, fracture permeability evolution over time, and comparative analysis of X-ray tomography of unreacted and reacted cement samples. These results are also compared to predictions by a complementary numerical study that couples geochemical, geomechanical and hydrodynamic simulations to model the formation of reaction fronts within the cement and their effect on fracture permeability. Copyright 2012 Springer-Verlag Wien JF - Rock Mechanics and Rock Engineering AU - Walsh, Stuart D C AU - Du Frane, Wyatt L AU - Mason, Harris E AU - Carroll, Susan A Y1 - 2013/05// PY - 2013 DA - May 2013 SP - 455 EP - 464 PB - Springer-Verlag, Vienna - New York VL - 46 IS - 3 SN - 0723-2632, 0723-2632 KW - corrosion KW - carbon capture and storage KW - sealing KW - hydraulics KW - underground storage KW - cement materials KW - fracturing KW - carbon dioxide KW - physical properties KW - deep drilling KW - brines KW - underground installations KW - drilling KW - construction materials KW - 30:Engineering geology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832609202?accountid=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=Rock+Mechanics+and+Rock+Engineering&rft.atitle=Permeability+of+wellbore-cement+fractures+following+degradation+by+carbonated+brine&rft.au=Walsh%2C+Stuart+D+C%3BDu+Frane%2C+Wyatt+L%3BMason%2C+Harris+E%3BCarroll%2C+Susan+A&rft.aulast=Walsh&rft.aufirst=Stuart+D&rft.date=2013-05-01&rft.volume=46&rft.issue=3&rft.spage=455&rft.isbn=&rft.btitle=&rft.title=Rock+Mechanics+and+Rock+Engineering&rft.issn=07232632&rft_id=info:doi/10.1007%2Fs00603-012-0336-9 L2 - http://www.springerlink.com/content/101578/ LA - English DB - GeoRef N1 - Conference title - 46th U. S. rock mechanics / geomechanics symposium 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 - 24 N1 - Last updated - 2017-01-24 N1 - CODEN - RMREDX N1 - SubjectsTermNotLitGenreText - brines; carbon capture and storage; carbon dioxide; cement materials; construction materials; corrosion; deep drilling; drilling; fracturing; hydraulics; physical properties; sealing; underground installations; underground storage DO - http://dx.doi.org/10.1007/s00603-012-0336-9 ER - TY - JOUR T1 - Coexistence of the alpha and delta phases in an as-cast uranium-rich U-Zr alloy AN - 1475532637; 18796672 AB - Uranium-zirconium alloys are being investigated for use in ultrahigh burn-up, metallic inert matrix nuclear fuels. Characterization of these alloys in the transmission electron microscope with spatial resolutions that are inaccessible by other techniques shows that the orthorhombic alpha and hexagonal, intermetallic delta phases coexist in an as-cast uranium-rich U-10 wt.% Zr alloy. Analyses reveal the chemistries of and crystallographic relationship between the two phases. JF - Journal of Nuclear Materials AU - McKeown, J T AU - Irukuvarghula, S AU - Ahn, S AU - Wall, M A AU - Hsiung, Ll AU - Mcdeavitt, S AU - Turchi, P E A AD - Condensed Matter and Materials Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, mckeown3@llnl.gov Y1 - 2013/05// PY - 2013 DA - May 2013 SP - 100 EP - 104 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 436 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Uranium base alloys KW - U-10Zr KW - Nuclear fuels KW - Radioactive materials KW - Alloys KW - Coexistence KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475532637?accountid=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=Coexistence+of+the+alpha+and+delta+phases+in+an+as-cast+uranium-rich+U-Zr+alloy&rft.au=McKeown%2C+J+T%3BIrukuvarghula%2C+S%3BAhn%2C+S%3BWall%2C+M+A%3BHsiung%2C+Ll%3BMcdeavitt%2C+S%3BTurchi%2C+P+E+A&rft.aulast=McKeown&rft.aufirst=J&rft.date=2013-05-01&rft.volume=436&rft.issue=1-3&rft.spage=100&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 48 N1 - Last updated - 2015-09-03 N1 - SubjectsTermNotLitGenreText - Radioactive materials; Nuclear fuels; Alloys; Coexistence ER - TY - JOUR T1 - Three-dimensional shallow shear-wave velocity model for the Las Vegas Valley AN - 1366816437; 2013-047842 AB - A three-dimensional (3-D) shear-wave velocity (Vcontent> (sub S) ) model was developed for the heterogeneous sediments of the Las Vegas Valley (LVV) in Nevada. The model was based on more than 200 Vcontent> (sub S) profiles (one-dimensional representation of Vcontent> (sub S) versus depth) and 1,400 geologic well logs. Incorporation of the well logs into the model was accomplished by condensing the geologic-log descriptions of the shallow sediments into five sediment units and then correlating Vcontent> (sub S) to these units. Characteristic Vcontent> (sub S) profiles were defined to represent four of these units by correlating between closely spaced pairs of Vcontent> (sub S) measurement sites and wells located within 500 m. These characteristic profiles were then used to generate Vcontent> (sub S) profiles at each well location by assigning Vcontent> (sub S) based on logged sediment type with respect to depth. The fifth unit was cemented sediment, for which a constant, depth-independent Vcontent> (sub S) value was assigned. Using the software EarthVision, the Vcontent> (sub S) profiles were interpolated in three dimensions, considering faults, to nearly 400 m in depth. Using regional data from an existing gravity-based survey, the model was extended to Paleozoic bedrock, which is locally deeper than 4 km. A 3-D section of the model demonstrated strong variability of Vcontent> (sub S) both laterally and vertically. Model accuracy varied spatially with data density. This model can be used to forecast earthquake ground-shaking patterns throughout the LVV. Particular application in engineering seismology can be found for high-rise structures that are vulnerable to long-period ground motion in a deep sedimentary basin. JF - Environmental & Engineering Geoscience AU - Murvosh, Helena AU - Luke, Barbara AU - Taylor, Wanda J AU - Wagoner, Jeff Y1 - 2013/05// PY - 2013 DA - May 2013 SP - 115 EP - 134 PB - Association of Environmental & Engineering Geologists and The Geological Society of America, College Station, TX VL - 19 IS - 2 SN - 1078-7275, 1078-7275 KW - United States KW - geophysical surveys KW - geologic hazards KW - sedimentary basins KW - well-logging KW - data processing KW - characterization KW - elastic waves KW - seismic logging KW - Clark County Nevada KW - Las Vegas Valley fault zone KW - substrates KW - Las Vegas Valley KW - sediments KW - basins KW - EarthVision KW - Nevada KW - soil mechanics KW - body waves KW - soil profiles KW - seismic profiles KW - three-dimensional models KW - variance analysis KW - statistical analysis KW - geophysical methods KW - correlation KW - semivariograms KW - seismic methods KW - models KW - computer programs KW - variograms KW - earthquake prediction KW - natural hazards KW - ground motion KW - surveys KW - geophysical profiles KW - unconsolidated materials KW - seismic waves KW - earthquakes KW - S-waves KW - 30:Engineering geology KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1366816437?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+%26+Engineering+Geoscience&rft.atitle=Three-dimensional+shallow+shear-wave+velocity+model+for+the+Las+Vegas+Valley&rft.au=Murvosh%2C+Helena%3BLuke%2C+Barbara%3BTaylor%2C+Wanda+J%3BWagoner%2C+Jeff&rft.aulast=Murvosh&rft.aufirst=Helena&rft.date=2013-05-01&rft.volume=19&rft.issue=2&rft.spage=115&rft.isbn=&rft.btitle=&rft.title=Environmental+%26+Engineering+Geoscience&rft.issn=10787275&rft_id=info:doi/10.2113%2Fgseegeosci.19.2.115 L2 - http://eeg.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Association of Engineering Geologists and the Geological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 54 N1 - PubXState - TX N1 - Document feature - illus. incl. 6 tables, sketch maps N1 - Last updated - 2013-06-13 N1 - CODEN - ENGEA9 N1 - SubjectsTermNotLitGenreText - basins; body waves; characterization; Clark County Nevada; computer programs; correlation; data processing; earthquake prediction; earthquakes; EarthVision; elastic waves; geologic hazards; geophysical methods; geophysical profiles; geophysical surveys; ground motion; Las Vegas Valley; Las Vegas Valley fault zone; models; natural hazards; Nevada; S-waves; sedimentary basins; sediments; seismic logging; seismic methods; seismic profiles; seismic waves; semivariograms; soil mechanics; soil profiles; statistical analysis; substrates; surveys; three-dimensional models; unconsolidated materials; United States; variance analysis; variograms; well-logging DO - http://dx.doi.org/10.2113/gseegeosci.19.2.115 ER - TY - JOUR T1 - A methodology for quantifying the value of spatial information for dynamic Earth problems AN - 1352285001; 17940938 AB - We develop a methodology for assessing the value of information (VOI) from spatial data for groundwater decisions. Two sources of uncertainty are the focus of this VOI methodology: the spatial heterogeneity (how it influences the hydrogeologic response of interest) and the reliability of geophysical data (how they provide information about the spatial heterogeneity). An existing groundwater situation motivates and in turn determines the scope of this research. The objectives of this work are to (1) represent the uncertainty of the dynamic hydrogeologic response due to spatial heterogeneity, (2) provide a quantitative measure for how well a particular information reveals this heterogeneity (the uncertainty of the information) and (3) use both of these to propose a VOI workflow for spatial decisions and spatial data. The uncertainty of the hydraulic response is calculated using many Earth models that are consistent with the a priori geologic information. The information uncertainty is achieved quantitatively through Monte Carlo integration and geostatistical simulation. Two VOI results are calculated which demonstrate that a higher VOI occurs when the geophysical attribute (the data) better discriminates between geological indicators. Although geophysical data can only indirectly measure static properties that may influence the dynamic response, this transferable methodology provides a framework to estimate the value of spatial data given a particular decision scenario. JF - Stochastic Environmental Research and Risk Assessment AU - Trainor-Guitton, Whitney J AU - Mukerji, Tapan AU - Knight, Rosemary AD - Lawrence Livermore National Laboratory, 7000 East Ave, L-231, Livermore, CA, 94550, USA, trainorguitton@llnl.gov Y1 - 2013/05// PY - 2013 DA - May 2013 SP - 969 EP - 983 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 27 IS - 4 SN - 1436-3240, 1436-3240 KW - Risk Abstracts KW - Monte Carlo simulation KW - Risk assessment KW - Hydraulics KW - Simulation KW - Geology KW - Geophysics KW - Groundwater KW - R2 23050:Environment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1352285001?accountid=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=A+methodology+for+quantifying+the+value+of+spatial+information+for+dynamic+Earth+problems&rft.au=Trainor-Guitton%2C+Whitney+J%3BMukerji%2C+Tapan%3BKnight%2C+Rosemary&rft.aulast=Trainor-Guitton&rft.aufirst=Whitney&rft.date=2013-05-01&rft.volume=27&rft.issue=4&rft.spage=969&rft.isbn=&rft.btitle=&rft.title=Stochastic+Environmental+Research+and+Risk+Assessment&rft.issn=14363240&rft_id=info:doi/10.1007%2Fs00477-012-0619-4 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-01 N1 - Number of references - 39 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Risk assessment; Monte Carlo simulation; Hydraulics; Simulation; Geology; Geophysics; Groundwater DO - http://dx.doi.org/10.1007/s00477-012-0619-4 ER - TY - JOUR T1 - Geochimica et Cosmochimica Acta AN - 1420514860; 2013-065103 AB - In the paper "On the Origins of GEMS" Keller and Messenger (2011) present the results of a study of GEMS (glass with embedded metal and sulfides) in chondritic porous interplanetary dust particles (CP IDPs). They find that non-solar oxygen isotopic abundances are detectable in a few typically the largest GEMS, confirming that they are surviving presolar amorphous silicates derived from the interstellar medium (ISM). They argue that those without detectable anomalies, the majority, formed in the solar system even though they are otherwise identical to the anomalous GEMS. Their conclusion is based on element-to-Si ratios, but GEMS-rich CP IDPs are collected, stored in and permanently contaminated with silicone oil. They are also thermally unstable and chemically reactive during atmospheric entry, which further modifies element-to-Si ratios. Both of the approaches employed to argue negligible silicone oil contamination are problematical: First, carbon is used as a tracer for silicone oil contamination, but carbon is both native to the IDPs and introduced throughout the sample collection and preparation processes. Second, the absence of an nearly equal 8 mu m infrared (IR) feature is cited, based on refitting of previously published spectra using a polynomial spline. Abstract Copyright (2013) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Bradley, John P Y1 - 2013/04/15/ PY - 2013 DA - 2013 Apr 15 SP - 336 EP - 340 PB - Elsevier, New York, NY VL - 107 SN - 0016-7037, 0016-7037 KW - solar system KW - stony meteorites KW - cosmochemistry KW - interplanetary dust KW - meteorites KW - cosmic dust KW - mineral composition KW - glass with embedded metal and sulfide grains KW - metals KW - chondrites KW - chemical composition KW - sulfides KW - GEMS grains KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1420514860?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geochimica+et+Cosmochimica+Acta&rft.au=Bradley%2C+John+P&rft.aulast=Bradley&rft.aufirst=John&rft.date=2013-04-15&rft.volume=107&rft.issue=&rft.spage=336&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2012.04.061 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 35 N1 - PubXState - NY N1 - Document feature - illus. N1 - SuppNotes - For reference to original see Keller, L. P. and Messenger, S., Geochimica et Cosmochimica Acta, Vol. 75, p. 5336-5365, 2011 N1 - Last updated - 2013-10-17 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - chemical composition; chondrites; cosmic dust; cosmochemistry; GEMS grains; glass with embedded metal and sulfide grains; interplanetary dust; metals; meteorites; mineral composition; solar system; stony meteorites; sulfides DO - http://dx.doi.org/10.1016/j.gca.2012.04.061 ER - TY - JOUR T1 - Advection of surface-derived organic carbon fuels microbial reduction in Bangladesh groundwater AN - 1718053916; 2015-095417 AB - Chronic exposure to arsenic (As) by drinking shallow groundwater causes widespread disease in Bangladesh and neighboring countries. The release of As naturally present in sediment to groundwater has been linked to the reductive dissolution of iron oxides coupled to the microbial respiration of organic carbon (OC). The source of OC driving this microbial reduction-carbon deposited with the sediments or exogenous carbon transported by groundwater-is still debated despite its importance in regulating aquifer redox status and groundwater As levels. Here, we used the radiocarbon ( (super 14) C) signature of microbial DNA isolated from groundwater samples to determine the relative importance of surface and sediment-derived OC. Three DNA samples collected from the shallow, high-As aquifer and one sample from the underlying, low-As aquifer were consistently younger than the total sediment carbon, by as much as several thousand years. This difference and the dominance of heterotrophic microorganisms implies that younger, surface-derived OC is advected within the aquifer, albeit more slowly than groundwater, and represents a critical pool of OC for aquifer microbial communities. The vertical profile shows that downward transport of dissolved OC is occurring on anthropogenic timescales, but bomb (super 14) C-labeled dissolved OC has not yet accumulated in DNA and is not fueling reduction. These results indicate that advected OC controls aquifer redox status and confirm that As release is a natural process that predates human perturbations to groundwater flow. Anthropogenic perturbations, however, could affect groundwater redox conditions and As levels in the future. JF - Proceedings of the National Academy of Sciences of the United States of America AU - Mailloux, Brian J AU - Trembath-Reichert, Elizabeth AU - Cheung, Jennifer AU - Watson, Marlena AU - Stute, Martin AU - Freyer, Greg A AU - Ferguson, Andrew S AU - Ahmed, Kazi Matin AU - Alam, M Jahangir AU - Buchholz, Bruce A AU - Thomas, James AU - Layton, Alice C AU - Zheng, Yan AU - Bostick, Benjamin C AU - van Geen, Alexander Y1 - 2013/04/02/ PY - 2013 DA - 2013 Apr 02 SP - 5331 EP - 5335 PB - National Academy of Sciences, Washington, DC VL - 110 IS - 14 SN - 0027-8424, 0027-8424 KW - iron oxides KW - isotopes KW - tritium KW - solution KW - Holocene KW - stable isotopes KW - ground water KW - upper Pleistocene KW - Cenozoic KW - radioactive isotopes KW - Indian Peninsula KW - carbon KW - age KW - sediments KW - Escherichia coli KW - oxides KW - coliform bacteria KW - Escherichia KW - organic carbon KW - Asia KW - water pollution KW - Eh KW - Bangladesh KW - toxic materials KW - Quaternary KW - arsenic KW - Araihazar Bangladesh KW - pollution KW - depth KW - C-14/C-12 KW - biota KW - nucleic acids KW - Lashkardi Bangladesh KW - radioactive tracers KW - metals KW - hydrogen KW - bacteria KW - DNA KW - Pleistocene KW - C-14 KW - water wells KW - water resources KW - public health KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718053916?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.atitle=Advection+of+surface-derived+organic+carbon+fuels+microbial+reduction+in+Bangladesh+groundwater&rft.au=Mailloux%2C+Brian+J%3BTrembath-Reichert%2C+Elizabeth%3BCheung%2C+Jennifer%3BWatson%2C+Marlena%3BStute%2C+Martin%3BFreyer%2C+Greg+A%3BFerguson%2C+Andrew+S%3BAhmed%2C+Kazi+Matin%3BAlam%2C+M+Jahangir%3BBuchholz%2C+Bruce+A%3BThomas%2C+James%3BLayton%2C+Alice+C%3BZheng%2C+Yan%3BBostick%2C+Benjamin+C%3Bvan+Geen%2C+Alexander&rft.aulast=Mailloux&rft.aufirst=Brian&rft.date=2013-04-02&rft.volume=110&rft.issue=14&rft.spage=5331&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.issn=00278424&rft_id=info:doi/10.1073%2Fpnas.1213141110 L2 - http://www.pnas.org/content/by/year LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 35 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables, sketch map N1 - SuppNotes - Lamont-Doherty Earth Observatory Contrib. No. 7663 N1 - Last updated - 2015-10-01 N1 - CODEN - PNASA6 N1 - SubjectsTermNotLitGenreText - age; Araihazar Bangladesh; arsenic; Asia; bacteria; Bangladesh; biota; C-14; C-14/C-12; carbon; Cenozoic; coliform bacteria; depth; DNA; Eh; Escherichia; Escherichia coli; ground water; Holocene; hydrogen; Indian Peninsula; iron oxides; isotopes; Lashkardi Bangladesh; metals; nucleic acids; organic carbon; oxides; Pleistocene; pollution; public health; Quaternary; radioactive isotopes; radioactive tracers; sediments; solution; stable isotopes; toxic materials; tritium; upper Pleistocene; water pollution; water resources; water wells DO - http://dx.doi.org/10.1073/pnas.1213141110 ER - TY - JOUR T1 - Investigating the source of nitrate in a Salinas Valley drinking water supply well with isotopic tracers AN - 1502297840; 2014-012441 AB - Nitrate-loading is a pervasive water quality problem in the Salinas Valley due to its rich agricultural history. Row crops, including strawberries and lettuce, are grown in the area immediately surrounding the drinking water supply well in this study. The application of fertilizers to these crops is compounded because the crops are irrigated with nutrient-rich agricultural return fed groundwater. The nitrate impacted drinking water supply well in this small agricultural labor co-operative community has been warranted unsafe for human consumption because nitrate concentrations were well above the MCL. A new water supply has recently replaced the former well. The former drinking water supply well, located in the Salinas Valley Groundwater Basin - Eastside Sub-basin, was completed at a depth of 450 ft. under semi-confined conditions of the alluvial Paso Robles Formation. One of the goals of the study is to unravel the complex dynamics associated with local and regional source loading, recharge, and discharge, and make a definitive statement about the source of the nitrate contamination in order to recommend best management practices into the future. This study implements an interdisciplinary approach to investigate the source of nitrate. Stable isotope ratios of water (delta (super 2) H,delta (super 18) O-H (sub 2) O) and nitrate (delta (super 15) N, delta (super 18) O-NO (sub 3) ) were analyzed as source indicators. Additionally the study utilized dissolved oxygen content, dissolved nitrogen and argon gas concentrations, selected anions (F (super -) , Cl (super -) , NO (sub 2) (super -) , Br (super -) , NO (sub 3) (super -) , SO (sub 4) (super 2-) ), and tritium-helium groundwater age-dating to examine the processes taking place in the subsurface. A high-resolution time-series dataset of pumping volumes and nitrate concentrations also provided invaluable insight into the changes in nitrate concentration that are observed seasonally. JF - Abstracts with Programs - Geological Society of America AU - Holtz, Marianne L AU - Esser, Bradley K AU - Hillegonds, Darren J AU - Moran, Jean E AU - Roberts, Sarah K AU - Singleton, Michael J AU - Visser, Ate AU - Anonymous Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 68 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - water quality KW - fertilizers KW - isotopes KW - pumping KW - drinking water KW - stable isotopes KW - nitrogen KW - irrigation KW - ground water KW - California KW - tracers KW - discharge KW - water supply KW - time series analysis KW - Salinas Valley KW - pollutants KW - statistical analysis KW - agriculture KW - solutes KW - pollution KW - nitrates KW - hydrochemistry KW - provenance KW - recharge KW - seasonal variations KW - water wells KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502297840?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Investigating+the+source+of+nitrate+in+a+Salinas+Valley+drinking+water+supply+well+with+isotopic+tracers&rft.au=Holtz%2C+Marianne+L%3BEsser%2C+Bradley+K%3BHillegonds%2C+Darren+J%3BMoran%2C+Jean+E%3BRoberts%2C+Sarah+K%3BSingleton%2C+Michael+J%3BVisser%2C+Ate%3BAnonymous&rft.aulast=Holtz&rft.aufirst=Marianne&rft.date=2013-04-01&rft.volume=45&rft.issue=6&rft.spage=68&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, Cordilleran Section, 109th 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 - 2014-02-27 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - agriculture; California; discharge; drinking water; fertilizers; ground water; hydrochemistry; irrigation; isotopes; nitrates; nitrogen; pollutants; pollution; provenance; pumping; recharge; Salinas Valley; seasonal variations; solutes; stable isotopes; statistical analysis; time series analysis; tracers; United States; water quality; water supply; water wells ER - TY - JOUR T1 - Using seismic interferometry to image the site of the source physics experiment AN - 1416691467; 2013-060615 JF - Seismological Research Letters AU - Matzel, E M AU - Mellors, R J AU - Pitarka, A AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 351 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - seismograms KW - experimental studies KW - detection KW - seismicity KW - explosions KW - Green function KW - seismic sources KW - interferometry KW - depth KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416691467?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Using+seismic+interferometry+to+image+the+site+of+the+source+physics+experiment&rft.au=Matzel%2C+E+M%3BMellors%2C+R+J%3BPitarka%2C+A%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Matzel&rft.aufirst=E&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=351&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - depth; detection; experimental studies; explosions; Green function; interferometry; seismic sources; seismicity; seismograms ER - TY - JOUR T1 - Estimation of yield and height-of-burst for near-surface explosions from seismoacoustic data AN - 1416691311; 2013-058704 JF - Seismological Research Letters AU - Rodgers, A J AU - Ford, S R AU - Ramirez, A L AU - Xu, H AU - Templeton, D C AU - Dodge, D A AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 308 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - technology KW - yields KW - explosions KW - elastic waves KW - information management KW - signals KW - data management KW - shallow depth KW - ground motion KW - seismic waves KW - acoustical waves KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416691311?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Estimation+of+yield+and+height-of-burst+for+near-surface+explosions+from+seismoacoustic+data&rft.au=Rodgers%2C+A+J%3BFord%2C+S+R%3BRamirez%2C+A+L%3BXu%2C+H%3BTempleton%2C+D+C%3BDodge%2C+D+A%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Rodgers&rft.aufirst=A&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=308&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - acoustical waves; amplitude; data management; elastic waves; explosions; ground motion; information management; seismic waves; shallow depth; signals; technology; yields ER - TY - JOUR T1 - Three dimensional simulation of far-field ground motion from source physics experiment using a hydrodynamic-to-elastic coupling technique AN - 1416690516; 2013-058691 JF - Seismological Research Letters AU - Pitarka, A P AU - Mellors, R J AU - Vorobiev, O V AU - Xu, H AU - Rodgers, A J AU - Walter, W R AU - Antoun, T A AU - Petersson, A AU - Sjogreen, B AU - Matzel, E AU - Wagoner, J AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 305 EP - 306 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - body waves KW - experimental studies KW - monitoring KW - three-dimensional models KW - explosions KW - elastic waves KW - seismic sources KW - simulation KW - ground motion KW - propagation KW - seismic waves KW - nuclear explosions KW - earthquakes KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416690516?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Three+dimensional+simulation+of+far-field+ground+motion+from+source+physics+experiment+using+a+hydrodynamic-to-elastic+coupling+technique&rft.au=Pitarka%2C+A+P%3BMellors%2C+R+J%3BVorobiev%2C+O+V%3BXu%2C+H%3BRodgers%2C+A+J%3BWalter%2C+W+R%3BAntoun%2C+T+A%3BPetersson%2C+A%3BSjogreen%2C+B%3BMatzel%2C+E%3BWagoner%2C+J%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Pitarka&rft.aufirst=A&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=305&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; earthquakes; elastic waves; experimental studies; explosions; ground motion; monitoring; nuclear explosions; propagation; S-waves; seismic sources; seismic waves; simulation; three-dimensional models ER - TY - JOUR T1 - Rock Valley Source Physics Experiment preparation; earthquake relocation and attenuation structure characterization AN - 1416690270; 2013-060621 JF - Seismological Research Letters AU - Pyle, M L AU - Walter, W R AU - Myers, S C AU - Pasyanos, M E AU - Smith, K D AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 352 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - experimental studies KW - explosions KW - mechanical properties KW - Rock Valley KW - seismic sources KW - seismic response KW - depth KW - Nevada National Security Site KW - attenuation KW - focus KW - algorithms KW - nuclear explosions KW - earthquakes KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416690270?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Rock+Valley+Source+Physics+Experiment+preparation%3B+earthquake+relocation+and+attenuation+structure+characterization&rft.au=Pyle%2C+M+L%3BWalter%2C+W+R%3BMyers%2C+S+C%3BPasyanos%2C+M+E%3BSmith%2C+K+D%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Pyle&rft.aufirst=M&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=352&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - algorithms; attenuation; depth; earthquakes; experimental studies; explosions; focus; mechanical properties; Nevada; Nevada National Security Site; nuclear explosions; Rock Valley; seismic response; seismic sources; United States ER - TY - JOUR T1 - Insights from the source physics experiments on P/S amplitude ratio methods of identifying explosions in a background of earthquakes AN - 1416689716; 2013-058689 JF - Seismological Research Letters AU - Walter, W R AU - Ford, S R AU - Pyle, M AU - Pasyanos, M E AU - Mellors, R J AU - Matzel, E AU - Hauk, T AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 305 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - P-waves KW - body waves KW - experimental studies KW - explosions KW - elastic waves KW - signals KW - seismicity KW - earthquake prediction KW - velocity KW - seismic waves KW - earthquakes KW - S-waves KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416689716?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Insights+from+the+source+physics+experiments+on+P%2FS+amplitude+ratio+methods+of+identifying+explosions+in+a+background+of+earthquakes&rft.au=Walter%2C+W+R%3BFord%2C+S+R%3BPyle%2C+M%3BPasyanos%2C+M+E%3BMellors%2C+R+J%3BMatzel%2C+E%3BHauk%2C+T%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Walter&rft.aufirst=W&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=305&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - amplitude; body waves; earthquake prediction; earthquakes; elastic waves; experimental studies; explosions; P-waves; S-waves; seismic waves; seismicity; signals; velocity ER - TY - JOUR T1 - Developing and validating a community velocity model for Boston AN - 1416689711; 2013-058746 JF - Seismological Research Letters AU - Thompson, Eric M AU - Berry, Bradford AU - Zhu, Jing AU - Baise, Laurie G AU - Ebel, John AU - Rodgers, A J AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 316 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - bedrock KW - geologic hazards KW - three-dimensional models KW - Suffolk County Massachusetts KW - sedimentary basins KW - frequency KW - Boston Massachusetts KW - Massachusetts KW - seismic risk KW - natural hazards KW - ground motion KW - basins KW - risk assessment KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416689711?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+and+validating+a+community+velocity+model+for+Boston&rft.au=Thompson%2C+Eric+M%3BBerry%2C+Bradford%3BZhu%2C+Jing%3BBaise%2C+Laurie+G%3BEbel%2C+John%3BRodgers%2C+A+J%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Thompson&rft.aufirst=Eric&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=316&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - basins; bedrock; Boston Massachusetts; earthquakes; frequency; geologic hazards; ground motion; Massachusetts; natural hazards; risk assessment; sedimentary basins; seismic risk; Suffolk County Massachusetts; three-dimensional models; United States ER - TY - JOUR T1 - A lithospheric attenuation model of North America AN - 1416689700; 2013-058627 JF - Seismological Research Letters AU - Pasyanos, M E AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 292 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - P-waves KW - elastic waves KW - Nevada Test Site KW - attenuation KW - surface waves KW - Love waves KW - propagation KW - Mineral Virginia KW - Nevada KW - Mineral earthquake 2011 KW - North America KW - body waves KW - discriminant analysis KW - Virginia KW - guided waves KW - explosions KW - lithosphere KW - statistical analysis KW - magnitude KW - prediction KW - Louisa County Virginia KW - models KW - ground motion KW - seismic waves KW - earthquakes KW - S-waves KW - crust KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416689700?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+lithospheric+attenuation+model+of+North+America&rft.au=Pasyanos%2C+M+E%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Pasyanos&rft.aufirst=M&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=292&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - attenuation; body waves; crust; discriminant analysis; earthquakes; elastic waves; explosions; ground motion; guided waves; lithosphere; Louisa County Virginia; Love waves; magnitude; Mineral earthquake 2011; Mineral Virginia; models; Nevada; Nevada Test Site; North America; P-waves; prediction; propagation; S-waves; seismic waves; statistical analysis; surface waves; United States; Virginia ER - TY - JOUR T1 - An explosion model comparison with insights from the source physics experiments AN - 1416689681; 2013-058685 JF - Seismological Research Letters AU - Ford, S R AU - Walter, W R AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 304 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - experimental studies KW - seismicity KW - explosions KW - magnitude KW - frequency KW - seismic sources KW - nuclear explosions KW - earthquakes KW - accuracy KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416689681?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+explosion+model+comparison+with+insights+from+the+source+physics+experiments&rft.au=Ford%2C+S+R%3BWalter%2C+W+R%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Ford&rft.aufirst=S&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=304&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - accuracy; earthquakes; experimental studies; explosions; frequency; magnitude; nuclear explosions; seismic sources; seismicity ER - TY - JOUR T1 - LLNL-G3Dv3; global P-wave tomography model for improved regional and teleseismic travel time prediction AN - 1416687545; 2013-060611 JF - Seismological Research Letters AU - Simmons, N A AU - Myers, S C AU - Johannesson, G AU - Matzel, E M AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 350 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - tomography KW - upper mantle KW - P-waves KW - LLNL-G3Dv3 KW - body waves KW - imagery KW - prediction KW - mantle KW - elastic waves KW - teleseismic signals KW - transition zones KW - traveltime KW - seismic waves KW - crust KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416687545?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=LLNL-G3Dv3%3B+global+P-wave+tomography+model+for+improved+regional+and+teleseismic+travel+time+prediction&rft.au=Simmons%2C+N+A%3BMyers%2C+S+C%3BJohannesson%2C+G%3BMatzel%2C+E+M%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Simmons&rft.aufirst=N&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=350&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; crust; elastic waves; imagery; LLNL-G3Dv3; mantle; P-waves; prediction; seismic waves; teleseismic signals; tomography; transition zones; traveltime; upper mantle ER - TY - JOUR T1 - Improved detection of microearthquakes; applying empirical matched field processing (MFP) to traditional and enhanced geothermal systems AN - 1416687529; 2013-058756 JF - Seismological Research Letters AU - Templeton, D C AU - Wang, J AU - Harris, D B AU - Goebel, M K AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 318 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - geothermal fields KW - technology KW - detection KW - swarms KW - seismicity KW - microearthquakes KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416687529?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Improved+detection+of+microearthquakes%3B+applying+empirical+matched+field+processing+%28MFP%29+to+traditional+and+enhanced+geothermal+systems&rft.au=Templeton%2C+D+C%3BWang%2C+J%3BHarris%2C+D+B%3BGoebel%2C+M+K%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Templeton&rft.aufirst=D&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=318&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - detection; earthquakes; geothermal fields; microearthquakes; seismicity; swarms; technology ER - TY - JOUR T1 - Simulation of ocean-bottom topography and water layer effects on waveforms recorded on the ocean floor and at teleseismic distances AN - 1416686367; 2013-058709 JF - Seismological Research Letters AU - Pitarka, A P AU - Mejia, H AU - Thio, H AU - Polet, J AU - Hayakawa, T AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 309 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - tomography KW - P-waves KW - body waves KW - technology KW - three-dimensional models KW - stress KW - elastic waves KW - waveforms KW - seismic sources KW - simulation KW - teleseismic signals KW - depth KW - propagation KW - seismic waves KW - ocean floors KW - earthquakes KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416686367?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Simulation+of+ocean-bottom+topography+and+water+layer+effects+on+waveforms+recorded+on+the+ocean+floor+and+at+teleseismic+distances&rft.au=Pitarka%2C+A+P%3BMejia%2C+H%3BThio%2C+H%3BPolet%2C+J%3BHayakawa%2C+T%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Pitarka&rft.aufirst=A&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=309&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - body waves; depth; earthquakes; elastic waves; ocean floors; P-waves; propagation; S-waves; seismic sources; seismic waves; simulation; stress; technology; teleseismic signals; three-dimensional models; tomography; waveforms ER - TY - JOUR T1 - Analysis of near-source shear motions from underground explosions AN - 1416685395; 2013-058687 JF - Seismological Research Letters AU - Vorobiev, O V AU - Antoun, T A AU - Pitarka, A P AU - Herbold, E H AU - Glenn, L G AU - Lomov, I L AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 305 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - body waves KW - experimental studies KW - numerical models KW - three-dimensional models KW - explosions KW - igneous rocks KW - granites KW - stress KW - elastic waves KW - deformation KW - simulation KW - depth KW - two-dimensional models KW - plutonic rocks KW - saturation KW - shear KW - propagation KW - seismic waves KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416685395?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Analysis+of+near-source+shear+motions+from+underground+explosions&rft.au=Vorobiev%2C+O+V%3BAntoun%2C+T+A%3BPitarka%2C+A+P%3BHerbold%2C+E+H%3BGlenn%2C+L+G%3BLomov%2C+I+L%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Vorobiev&rft.aufirst=O&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=305&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; deformation; depth; elastic waves; experimental studies; explosions; granites; igneous rocks; numerical models; plutonic rocks; propagation; S-waves; saturation; seismic waves; shear; simulation; stress; three-dimensional models; two-dimensional models ER - TY - JOUR T1 - Efficient wave propagation methods for high frequency modeling of seismic events AN - 1416684992; 2013-058838 JF - Seismological Research Letters AU - Petersson, N A AU - Sjogreen, B AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 335 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - models KW - finite element analysis KW - technology KW - seismicity KW - propagation KW - elastic waves KW - seismic waves KW - frequency KW - simulation KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416684992?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Efficient+wave+propagation+methods+for+high+frequency+modeling+of+seismic+events&rft.au=Petersson%2C+N+A%3BSjogreen%2C+B%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Petersson&rft.aufirst=N&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=335&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 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - earthquakes; elastic waves; finite element analysis; frequency; models; propagation; seismic waves; seismicity; simulation; technology ER - TY - JOUR T1 - Virtual Treatment of Basilar Aneurysms Using Shape Memory Polymer Foam AN - 1323813372; 17827809 AB - Numerical simulations are performed on patient-specific basilar aneurysms that are treated with shape memory polymer (SMP) foam. In order to assess the post-treatment hemodynamics, two modeling approaches are employed. In the first, the foam geometry is obtained from a micro-CT scan and the pulsatile blood flow within the foam is simulated for both Newtonian and non-Newtonian viscosity models. In the second, the foam is represented as a porous media continuum, which has permeability properties that are determined by computing the pressure gradient through the foam geometry over a range of flow speeds comparable to those of in vivo conditions. Virtual angiography and additional post-processing demonstrate that the SMP foam significantly reduces the blood flow speed within the treated aneurysms, while eliminating the high-frequency velocity fluctuations that are present within the pre-treatment aneurysms. An estimation of the initial locations of thrombus formation throughout the SMP foam is obtained by means of a low fidelity thrombosis model that is based upon the residence time and shear rate of blood. The Newtonian viscosity model and the porous media model capture similar qualitative trends, though both yield a smaller volume of thrombus within the SMP foam. JF - Annals of Biomedical Engineering AU - Ortega, J M AU - Hartman, J AU - Rodriguez, J N AU - Maitland, D J AD - Engineering Technologies Division, Lawrence Livermore National Laboratory, P.O. Box 808, L-090, Livermore, CA, 94551, USA, ortega17@llnl.gov Y1 - 2013/04// PY - 2013 DA - Apr 2013 SP - 725 EP - 743 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 41 IS - 4 SN - 0090-6964, 0090-6964 KW - Biotechnology and Bioengineering Abstracts KW - Mathematical models KW - Aneurysm KW - Hemodynamics KW - Foams KW - Thrombosis KW - Models KW - Permeability KW - Angiography KW - Fidelity KW - Memory KW - Viscosity KW - Computed tomography KW - Pressure KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1323813372?accountid=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=Annals+of+Biomedical+Engineering&rft.atitle=Virtual+Treatment+of+Basilar+Aneurysms+Using+Shape+Memory+Polymer+Foam&rft.au=Ortega%2C+J+M%3BHartman%2C+J%3BRodriguez%2C+J+N%3BMaitland%2C+D+J&rft.aulast=Ortega&rft.aufirst=J&rft.date=2013-04-01&rft.volume=41&rft.issue=4&rft.spage=725&rft.isbn=&rft.btitle=&rft.title=Annals+of+Biomedical+Engineering&rft.issn=00906964&rft_id=info:doi/10.1007%2Fs10439-012-0719-9 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-04-01 N1 - Number of references - 64 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Mathematical models; Aneurysm; Hemodynamics; Foams; Thrombosis; Models; Permeability; Memory; Fidelity; Angiography; Viscosity; Computed tomography; Pressure DO - http://dx.doi.org/10.1007/s10439-012-0719-9 ER - TY - JOUR T1 - Decadal cycling within long-lived carbon pools revealed by dual isotopic analysis of mineral-associated soil organic matter AN - 1673366544; 2015-034905 AB - Long-lived soil organic matter (SOM) pools are critical for the global carbon (C) cycle, but challenges in isolating such pools have inhibited understanding of their dynamics. We physically isolated particulate (>53 mu m), silt-, and clay-sized organic matter from soils collected over two decades from a perennial C (sub 3) grassland established on long-term agricultural soil with a predominantly C (sub 4) isotopic signature. Silt- and clay-sized fractions were then subjected to a sequential chemical fractionation (acid hydrolysis followed by peroxide oxidation) to isolate long-lived C pools. We quantified (super 14) C and the natural (super 13) C isotopic label in the resulting fractions to identify and evaluate pools responsible for long-lived SOM. After removal of particulate organic matter ( approximately 14% of bulk soil C) sequential chemical treatment removed 80% of mineral-associated C. In all mineral-associated fractions, at least 55% of C (sub 4) -derived C was retained 32 years after the switch to C (sub 3) inputs. However, C (sub 3) -C increased substantially beginning approximately 25 years after the switch. Radiocarbon-based turnover times ranged from roughly 1200-3000 years for chemically resistant mineral-associated pools, although some pools turned over faster under C (sub 3) grassland than in a reference agricultural field, indicating that new material had entered some pools as early as 14 years after the vegetation switch. These findings provide further evidence that SOM chemistry does not always reflect SOM longevity and resistance to microbial decomposition. Even measureable SOM fractions that have extremely long mean turnover times (>1500 years) can have a substantial component that is dynamic over much shorter timescales. Copyright 2013 Springer Science+Business Media Dordrecht and 2011 Springer Science+Business Media B.V. JF - Biogeochemistry (Dordrecht) AU - O'Brien, Sarah L AU - Jastrow, Julie D AU - McFarlane, Karis J AU - Guilderson, Thomas P AU - Gonzalez-Meler, Miquel A Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 111 EP - 125 PB - Springer, Dordrecht - Boston - Lancaster VL - 112 IS - 1-3 SN - 0168-2563, 0168-2563 KW - United States KW - Batavia Illinois KW - Kane County Illinois KW - isotope fractionation KW - decadal variations KW - degradation KW - isotopes KW - vegetation KW - stable isotopes KW - Argiudolls KW - nitrogen KW - ecalcitrance KW - radioactive isotopes KW - carbon KW - soils KW - Illinois KW - isotope ratios KW - C3 plants KW - oxidation KW - cyclic processes KW - C-13/C-12 KW - Prairie Peninsula KW - geochemical cycle KW - organic compounds KW - C4 plants KW - carbon cycle KW - C-14 KW - Mollisols KW - chemical fractionation KW - 02D:Isotope geochemistry KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366544?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biogeochemistry+%28Dordrecht%29&rft.atitle=Decadal+cycling+within+long-lived+carbon+pools+revealed+by+dual+isotopic+analysis+of+mineral-associated+soil+organic+matter&rft.au=O%27Brien%2C+Sarah+L%3BJastrow%2C+Julie+D%3BMcFarlane%2C+Karis+J%3BGuilderson%2C+Thomas+P%3BGonzalez-Meler%2C+Miquel+A&rft.aulast=O%27Brien&rft.aufirst=Sarah&rft.date=2013-03-01&rft.volume=112&rft.issue=1-3&rft.spage=111&rft.isbn=&rft.btitle=&rft.title=Biogeochemistry+%28Dordrecht%29&rft.issn=01682563&rft_id=info:doi/10.1007%2Fs10533-011-9673-0 L2 - http://www.springerlink.com/content/100244/ LA - English DB - GeoRef N1 - Conference title - Organic matter stabilization and ecosystem functions 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 - 66 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Argiudolls; Batavia Illinois; C-13/C-12; C-14; C3 plants; C4 plants; carbon; carbon cycle; chemical fractionation; cyclic processes; decadal variations; degradation; ecalcitrance; geochemical cycle; Illinois; isotope fractionation; isotope ratios; isotopes; Kane County Illinois; Mollisols; nitrogen; organic compounds; oxidation; Prairie Peninsula; radioactive isotopes; soils; stable isotopes; United States; vegetation DO - http://dx.doi.org/10.1007/s10533-011-9673-0 ER - TY - JOUR T1 - Millennial-scale climate change and intermediate water circulation in the Bering Sea from 90 ka; a high-resolution record from IODP Site U1340 AN - 1562650075; 2014-000253 AB - Millennial-scale climate events in the North Pacific are thought to be related to changes in the circulation of North Pacific Intermediate Water, which may have formed in the Bering Sea in the past. To advance our understanding of the mechanisms that underlie millennial-scale events, Bering Sea sediment cores from the Integrated Ocean Drilling Program site U1340 were used to construct high-resolution, multiproxy climate records of the last 90,000 years. Sediment density records show millennial-scale events resembling Dansgaard-Oeschger events, several of which are laminated. Interstadials were characterized by 3-5 degrees C warming, increased productivity driven by upwelling, and reduced benthic oxygenation. Bering Sea intermediate water also changed over longer timescales; our records show the presence of intermediate water with lower salinity and higher oxygen content than modern beginning around 60 ka and persisting until the beginning of the deglaciation. The Bolling-Allerod was characterized by high productivity, laminated sediments, and strong denitrification signature. Our data support the idea that productivity-derived changes in oxygenation at intermediate water source regions may have contributed to the intensification of the North Pacific-wide oxygen minima during the Bolling-Allerod. Abstract Copyright (2012), . American Geophysical Union. All Rights Reserved. JF - Paleoceanography AU - Schlung, Shiloh A AU - Ravelo, A Christina AU - Aiello, Ivano W AU - Andreasen, Dyke H AU - Cook, Mea S AU - Drake, Michelle AU - Dyez, Kelsey A AU - Guilderson, Thomas P AU - LaRiviere, Jonathan P AU - Stroynowski, Zuzanna AU - Takahashi, Kozo Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 54 EP - 67 PB - American Geophysical Union, Washington, DC VL - 28 IS - 1 SN - 0883-8305, 0883-8305 KW - silicates KW - last glacial maximum KW - oxygen KW - isotopes KW - paleo-oceanography KW - Bowers Ridge KW - algae KW - paleoclimatology KW - Holocene KW - stable isotopes KW - deglaciation KW - climate change KW - West Pacific KW - nitrogen KW - upper Pleistocene KW - Foraminifera KW - Cenozoic KW - mineral composition KW - diatoms KW - paleotemperature KW - carbon KW - alkenones KW - MIS 3 KW - Invertebrata KW - Northwest Pacific KW - IODP Site U1340 KW - Plantae KW - Protista KW - N-15/N-14 KW - Quaternary KW - assemblages KW - isotope ratios KW - C-13/C-12 KW - Bering Sea KW - Integrated Ocean Drilling Program KW - O-18/O-16 KW - clay minerals KW - organic compounds KW - paleoenvironment KW - North Pacific KW - marine environment KW - Pacific Ocean KW - Pleistocene KW - sheet silicates KW - Expedition 323 KW - microfossils KW - ketones KW - 24:Quaternary geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1562650075?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Paleoceanography&rft.atitle=Millennial-scale+climate+change+and+intermediate+water+circulation+in+the+Bering+Sea+from+90+ka%3B+a+high-resolution+record+from+IODP+Site+U1340&rft.au=Schlung%2C+Shiloh+A%3BRavelo%2C+A+Christina%3BAiello%2C+Ivano+W%3BAndreasen%2C+Dyke+H%3BCook%2C+Mea+S%3BDrake%2C+Michelle%3BDyez%2C+Kelsey+A%3BGuilderson%2C+Thomas+P%3BLaRiviere%2C+Jonathan+P%3BStroynowski%2C+Zuzanna%3BTakahashi%2C+Kozo&rft.aulast=Schlung&rft.aufirst=Shiloh&rft.date=2013-03-01&rft.volume=28&rft.issue=1&rft.spage=54&rft.isbn=&rft.btitle=&rft.title=Paleoceanography&rft.issn=08838305&rft_id=info:doi/10.1029%2F2012PA002365 L2 - http://www.agu.org/journals/pa/ 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 - 104 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables, sketch map N1 - SuppNotes - NSF Grant OCE 0963144 N1 - Last updated - 2014-09-18 N1 - CODEN - POCGEP N1 - SubjectsTermNotLitGenreText - algae; alkenones; assemblages; Bering Sea; Bowers Ridge; C-13/C-12; carbon; Cenozoic; clay minerals; climate change; deglaciation; diatoms; Expedition 323; Foraminifera; Holocene; Integrated Ocean Drilling Program; Invertebrata; IODP Site U1340; isotope ratios; isotopes; ketones; last glacial maximum; marine environment; microfossils; mineral composition; MIS 3; N-15/N-14; nitrogen; North Pacific; Northwest Pacific; O-18/O-16; organic compounds; oxygen; Pacific Ocean; paleo-oceanography; paleoclimatology; paleoenvironment; paleotemperature; Plantae; Pleistocene; Protista; Quaternary; sheet silicates; silicates; stable isotopes; upper Pleistocene; West Pacific DO - http://dx.doi.org/10.1029/2012PA002365 ER - TY - JOUR T1 - Comparison of soil organic matter dynamics at five temperate deciduous forests with physical fractionation and radiocarbon measurements AN - 1352282857; 17894394 AB - Forest soils represent a significant pool for carbon sequestration and storage, but the factors controlling soil carbon cycling are not well constrained. We compared soil carbon dynamics at five broadleaf forests in the Eastern US that vary in climate, soil type, and soil ecology: two sites at the University of Michigan Biological Station (MI-Coarse, sandy; MI-Fine, loamy); Bartlett Experimental Forest (NH-BF); Harvard Forest (MA-HF); and Baskett Wildlife Recreation and Education Area (MO-OZ). We quantified soil carbon stocks and measured bulk soil radiocarbon to at least 60 cm depth. We determined surface (0-15 cm) soil carbon distribution and turnover times in free light (unprotected), occluded light (intra-aggregate), and dense (mineral-associated) soil fractions. Total soil carbon stocks ranged from 55 plus or minus 4 to 229 plus or minus 42 Mg C ha super(-1) and were lowest at MI-Coarse and MO-OZ and highest at MI-Fine and NH-BF. Differences in climate only partly explained differences in soil organic matter super(14)C and mean turnover times, which were 75-260 year for free-light fractions, 70-625 year for occluded-light fractions, and 90-480 year for dense fractions. Turnover times were shortest at the warmest site, but longest at the northeastern sites (NH-BF and MA-HF), rather than the coldest sites (MI-Coarse and MI-Fine). Soil texture, mineralogy, drainage, and macrofaunal activity may be at least as important as climate in determining soil carbon dynamics in temperate broadleaf forests. JF - Biogeochemistry AU - McFarlane, Karis J AU - Torn, Margaret S AU - Hanson, Paul J AU - Porras, Rachel C AU - Swanston, Christopher W AU - Callaham, Mac A AU - Guilderson, Thomas P AD - Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, 7000 East Avenue, L-397, Livermore, CA, 94551, USA, mcfarlane3@llnl.gov Y1 - 2013/03// PY - 2013 DA - Mar 2013 SP - 457 EP - 476 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 112 IS - 1-3 SN - 0168-2563, 0168-2563 KW - ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts; Aqualine Abstracts; Ecology Abstracts; Sustainability Science Abstracts KW - Soil types KW - Soil Texture KW - Deciduous forests KW - Forests KW - Soil texture KW - Mineralogy KW - Turnover Time KW - Ecology KW - Soil KW - Carbon KW - Biogeochemical cycle KW - Drainage KW - Organic matter KW - Climates KW - Wildlife KW - Climate KW - Carbon 14 KW - Carbon cycle KW - Soils (organic) KW - Soil Organic Matter KW - Soil ecology KW - Education KW - Recreation KW - Soil Types KW - Zoobenthos KW - Q5 08503:Characteristics, behavior and fate KW - M3 1010:Issues in Sustainable Development KW - D 04040:Ecosystem and Ecology Studies KW - SW 7010:Education - extramural KW - AQ 00003:Monitoring and Analysis of Water and Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1352282857?accountid=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=Biogeochemistry&rft.atitle=Comparison+of+soil+organic+matter+dynamics+at+five+temperate+deciduous+forests+with+physical+fractionation+and+radiocarbon+measurements&rft.au=McFarlane%2C+Karis+J%3BTorn%2C+Margaret+S%3BHanson%2C+Paul+J%3BPorras%2C+Rachel+C%3BSwanston%2C+Christopher+W%3BCallaham%2C+Mac+A%3BGuilderson%2C+Thomas+P&rft.aulast=McFarlane&rft.aufirst=Karis&rft.date=2013-03-01&rft.volume=112&rft.issue=1-3&rft.spage=457&rft.isbn=&rft.btitle=&rft.title=Biogeochemistry&rft.issn=01682563&rft_id=info:doi/10.1007%2Fs10533-012-9740-1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-01 N1 - Number of references - 85 N1 - Last updated - 2014-12-11 N1 - SubjectsTermNotLitGenreText - Education; Recreation; Biogeochemical cycle; Organic matter; Climate; Carbon cycle; Carbon 14; Mineralogy; Zoobenthos; Soil types; Carbon; Drainage; Wildlife; Soil texture; Soils (organic); Soil; Soil ecology; Deciduous forests; Forests; Ecology; Soil Texture; Climates; Soil Types; Soil Organic Matter; Turnover Time DO - http://dx.doi.org/10.1007/s10533-012-9740-1 ER - TY - JOUR T1 - Long-term talus flatirons formation in the hyperarid northeastern Negev, Israel AN - 1328503427; 2013-033973 AB - Colluvial sediments of talus relicts ("talus flatirons") around mesas preserve a record that sheds light on slope-forming processes at temporal scales >10 (super 3) yr. The sedimentology and soil stratigraphy of two groups of talus flatirons in the northeastern hyperarid Negev desert reveal four deposition events in the younger talus and at least two in the older one. Numerical modeling of high-resolution (super 10) Be depth profiles suggests that these taluses were deposited during the middle Pleistocene; the younger talus group first depositional event occurred at 551 (sub -142) (super +80) ka and its abandonment occurred at 270 (sub -38) (super +17) ka. The abandonment of the older talus group and stabilization of its surface occurred at 497 (sub -114) (super +176) ka. These ages indicate that the development of the studied talus sequence is not specifically associated with Pleistocene glacial-interglacial cycles. The (super 10) Be modeled concentrations indicate significant differences in the average inheritance of talus flatirons of different groups. These differences can be attributed to variability in the transport distance and duration of gravel exposure during transport but could also reflect some temporal variability in cliff retreat. Our results also demonstrate that talus slopes in hyperarid areas, despite their steepness, can store sediment for long periods ( approximately 500 ka) and thus constitute a valuable archive. Abstract Copyright (2013) Elsevier, B.V. JF - Quaternary Research AU - Boroda, Ronen AU - Matmon, Ari AU - Amit, Rivka AU - Haviv, Itai AU - Porat, Naomi AU - Arnold, M AU - Aumaitre, G AU - Bourles, D AU - Keddadouche, K AU - Rood, Dylan AU - Eyal, Yehuda AU - Enzel, Yehuda Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 256 EP - 267 PB - Elsevier, New York, NY VL - 79 IS - 2 SN - 0033-5894, 0033-5894 KW - relative age KW - lithostratigraphy KW - terrestrial environment KW - isotopes KW - landforms KW - Israel KW - erosion features KW - exposure age KW - upper Pleistocene KW - Cenozoic KW - radioactive isotopes KW - optically stimulated luminescence KW - transport KW - dates KW - northeastern Negev KW - digital simulation KW - sediments KW - Negev KW - Asia KW - Middle East KW - alkaline earth metals KW - talus slopes KW - Quaternary KW - numerical models KW - Be-10 KW - sediment transport KW - colluvium KW - clastic sediments KW - chronostratigraphy KW - arid environment KW - landform evolution KW - deposition KW - metals KW - Pleistocene KW - geomorphology KW - beryllium KW - 24:Quaternary geology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1328503427?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Research&rft.atitle=Long-term+talus+flatirons+formation+in+the+hyperarid+northeastern+Negev%2C+Israel&rft.au=Boroda%2C+Ronen%3BMatmon%2C+Ari%3BAmit%2C+Rivka%3BHaviv%2C+Itai%3BPorat%2C+Naomi%3BArnold%2C+M%3BAumaitre%2C+G%3BBourles%2C+D%3BKeddadouche%2C+K%3BRood%2C+Dylan%3BEyal%2C+Yehuda%3BEnzel%2C+Yehuda&rft.aulast=Boroda&rft.aufirst=Ronen&rft.date=2013-03-01&rft.volume=79&rft.issue=2&rft.spage=256&rft.isbn=&rft.btitle=&rft.title=Quaternary+Research&rft.issn=00335894&rft_id=info:doi/10.1016%2Fj.yqres.2012.11.012 L2 - http://www.sciencedirect.com/science/journal/00335894 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 66 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables, geol. sketch map N1 - Last updated - 2013-04-19 N1 - CODEN - QRESAV N1 - SubjectsTermNotLitGenreText - alkaline earth metals; arid environment; Asia; Be-10; beryllium; Cenozoic; chronostratigraphy; clastic sediments; colluvium; dates; deposition; digital simulation; erosion features; exposure age; geomorphology; isotopes; Israel; landform evolution; landforms; lithostratigraphy; metals; Middle East; Negev; northeastern Negev; numerical models; optically stimulated luminescence; Pleistocene; Quaternary; radioactive isotopes; relative age; sediment transport; sediments; talus slopes; terrestrial environment; transport; upper Pleistocene DO - http://dx.doi.org/10.1016/j.yqres.2012.11.012 ER - TY - JOUR T1 - CMIP3 Subtropical Stratocumulus Cloud Feedback Interpreted through a Mixed-Layer Model AN - 1318692945; 17767334 AB - Large-scale conditions over subtropical marine stratocumulus areas are extracted from global climate models (GCMs) participating in phase 3 of the Coupled Model Intercomparison Project (CMIP3) and used to drive an atmospheric mixed-layer model (MLM) for current and future climate scenarios. Cloud fraction is computed as the fraction of days where GCM forcings produce a cloudy equilibrium MLM state. This model is a good predictor of cloud fraction and its temporal variations on time scales longer than 1 week but overpredicts liquid water path and entrainment. GCM cloud fraction compares poorly with observations of mean state, variability, and correlation with estimated inversion strength (EIS). MLM cloud fraction driven by these same GCMs, however, agrees well with observations, suggesting that poor GCM low cloud fraction is due to deficiencies in cloud parameterizations rather than large-scale conditions. However, replacing the various GCM cloud parameterizations with a single physics package (the MLM) does not reduce intermodel spread in low-cloud feedback because the MLM is more sensitive than the GCMs to existent intermodel variations in large-scale forcing. This suggests that improving GCM low cloud physics will not by itself reduce intermodel spread in predicted stratocumulus cloud feedback. Differences in EIS and EIS change between GCMs are found to be a good predictor of current-climate MLM cloud amount and future cloud change. CMIP3 GCMs predict a robust increase of 0.5-1 K in EIS over the next century, resulting in a 2.3%-4.5% increase in MLM cloudiness. If EIS increases are real, subtropical stratocumulus may damp global warming in a way not captured by the GCMs studied. JF - Journal of Climate AU - Caldwell, Peter M AU - Zhang, Yunyan AU - Klein, Stephen A AD - Lawrence Livermore National Laboratory, Livermore, California Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 1607 EP - 1625 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 26 IS - 5 SN - 0894-8755, 0894-8755 KW - Meteorological & Geoastrophysical Abstracts; Sustainability Science Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Climate change KW - Atmospheric circulation-oceanic circulation coupled models KW - Low clouds KW - Cloud physics KW - Cloud amount KW - Packaging KW - Modelling KW - Climate models KW - Marine stratocumulus KW - Temporal variations KW - Atmospheric circulation KW - Greenhouse effect KW - Cloud cover KW - Inversions KW - Clouds KW - Inversion KW - General circulation models KW - Atmospheric forcing KW - Global warming KW - Cloud parameterization KW - Future climates KW - Q2 09243:Structure, mechanics and thermodynamics 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/1318692945?accountid=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+Climate&rft.atitle=CMIP3+Subtropical+Stratocumulus+Cloud+Feedback+Interpreted+through+a+Mixed-Layer+Model&rft.au=Caldwell%2C+Peter+M%3BZhang%2C+Yunyan%3BKlein%2C+Stephen+A&rft.aulast=Caldwell&rft.aufirst=Peter&rft.date=2013-03-01&rft.volume=26&rft.issue=5&rft.spage=1607&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-12-00188.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-03-01 N1 - Number of references - 71 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Temporal variations; Climate change; Atmospheric forcing; Greenhouse effect; Atmospheric circulation; Cloud cover; Cloud physics; Inversions; Modelling; Clouds; Climate models; Marine stratocumulus; General circulation models; Cloud amount; Cloud parameterization; Atmospheric circulation-oceanic circulation coupled models; Low clouds; Future climates; Inversion; Global warming; Packaging DO - http://dx.doi.org/10.1175/JCLI-D-12-00188.1 ER - TY - JOUR T1 - Evaluating adjusted forcing and model spread for historical and future scenarios in the CMIP5 generation of climate models AN - 1502293938; 2014-013932 AB - We utilize energy budget diagnostics from the Coupled Model Intercomparison Project phase 5 (CMIP5) to evaluate the models' climate forcing since preindustrial times employing an established regression technique. The climate forcing evaluated this way, termed the adjusted forcing (AF), includes a rapid adjustment term associated with cloud changes and other tropospheric and land-surface changes. We estimate a 2010 total anthropogenic and natural AF from CMIP5 models of 1.9 + or - 0.9 W m (super -2) (5-95% range). The projected AF of the Representative Concentration Pathway simulations are lower than their expected radiative forcing (RF) in 2095 but agree well with efficacy weighted forcings from integrated assessment models. The smaller AF, compared to RF, is likely due to cloud adjustment. Multimodel time series of temperature change and AF from 1850 to 2100 have large intermodel spreads throughout the period. The intermodel spread of temperature change is principally driven by forcing differences in the present day and climate feedback differences in 2095, although forcing differences are still important for model spread at 2095. We find no significant relationship between the equilibrium climate sensitivity (ECS) of a model and its 2003 AF, in contrast to that found in older models where higher ECS models generally had less forcing. Given the large present-day model spread, there is no indication of any tendency by modelling groups to adjust their aerosol forcing in order to produce observed trends. Instead, some CMIP5 models have a relatively large positive forcing and overestimate the observed temperature change. Abstract Copyright (2013), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Atmospheres AU - Forster, Piers M AU - Andrews, Timothy AU - Good, Peter AU - Gregory, Jonathan M AU - Jackson, Lawrence S AU - Zelinka, Mark Y1 - 2013/02/16/ PY - 2013 DA - 2013 Feb 16 SP - 1139 EP - 1150 PB - Blackwell Wiley for American Geophysical Union, Washington, DC VL - 118 IS - 3 SN - 2169-897X, 2169-897X KW - models KW - climate effects KW - prediction KW - global change KW - reconstruction KW - climate forcing KW - paleoclimatology KW - meteorology KW - climate change KW - temperature KW - global warming KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502293938?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Atmospheres&rft.atitle=Evaluating+adjusted+forcing+and+model+spread+for+historical+and+future+scenarios+in+the+CMIP5+generation+of+climate+models&rft.au=Forster%2C+Piers+M%3BAndrews%2C+Timothy%3BGood%2C+Peter%3BGregory%2C+Jonathan+M%3BJackson%2C+Lawrence+S%3BZelinka%2C+Mark&rft.aulast=Forster&rft.aufirst=Piers&rft.date=2013-02-16&rft.volume=118&rft.issue=3&rft.spage=1139&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2Fjgrd.50174 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-8996 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 - 36 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - climate change; climate effects; climate forcing; global change; global warming; meteorology; models; paleoclimatology; prediction; reconstruction; temperature DO - http://dx.doi.org/10.1002/jgrd.50174 ER - TY - JOUR T1 - Volatile fluxes through the Big Bend section of the San Andreas Fault, California; helium and carbon dioxide systematics AN - 1316374683; 2013-026809 AB - To investigate the source of volatiles and their relationship to the San Andreas Fault System (SAFS), 18 groundwater samples were collected from wells near the Big Bend section of the SAFS in Southern California and analyzed for helium and carbon abundance and isotopes. Concentrations of (super 4) He, corrected for air-bubble entrainment, vary from 4.15 to 62.7 (X 10 (super -8) ) cm (super 3) STPg (super -1) H (sub 2) O . (super 3) He/ (super 4) He ratios vary from 0.09 to 3.52 R (sub A) (where R (sub A) =air (super 3) He/ (super 4) He), consistent with up to 44% mantle helium in samples. A subset of 10 samples was analyzed for the major volatile phase (CO (sub 2) )--the hypothesized carrier phase of the helium in the mantle-crust system: CO (sub 2) / (super 3) He ratios vary from 0.614 to 142 (X 10 (super 11) ), and delta (super 13) C (CO (sub 2) ) values vary from -21.5 to -11.9 ppm (vs. PDB). (super 3) He/ (super 4) He ratios and CO (sub 2) concentrations are highest in the wells located in the Mil Potrero and Cuddy Valleys adjacent to the SAFS. The elevated (super 3) He/ (super 4) He ratios are interpreted to be a consequence of a mantle volatile flux though the SAFS diluted by radiogenic He produced in the crust. Samples with the highest (super 3) He/ (super 4) He ratios also had the lowest CO (sub 2) / (super 3) He ratios. The combined helium isotope, He-CO (sub 2) elemental relationships, and delta (super 13) C (CO (sub 2) ) values of the groundwater volatiles reveal a mixture of mantle and deep crustal (metamorphic) fluid origins. The flux of fluids into the seismogenic zone at high hydrostatic pressure may cause fault rupture, and transfer volatiles into the shallow crust. We calculate an upward fluid flow rate of 147mma (super -1) along the SAFS, up to 37 times higher than previous estimates (Kennedy et al., 1997). However, using newly identified characteristics of the SAFS, we calculate a total flux of (super 3) He along the SAFS of 7.4 X 10 (super 3) cm (super 3) STPa (super -1) (0.33mol (super 3) Hea (super -1) ), and a CO (sub 2) flux of 1.5 X 10 (super 13) cm (super 3) STPa (super -1) (6.6 X 10 (super 8) mola (super -1) ), approximately 1% of previous estimates. Lower fluxes along the Big Bend section of the SAFS suggest that the flux of mantle volatiles alone is insufficient to cause the super hydrostatic pressure in the seismogenic zone; however, results identify crustal (metamorphic) fluids as a major component of the CO (sub 2) volatile budget, which may represent the additional flux necessary for fault weakening pressure in the SAFS. Abstract Copyright (2013) Elsevier, B.V. JF - Chemical Geology AU - Kulongoski, Justin T AU - Hilton, David R AU - Barry, Peter H AU - Esser, Bradley K AU - Hillegonds, Darren AU - Belitz, Kenneth Y1 - 2013/02/15/ PY - 2013 DA - 2013 Feb 15 SP - 92 EP - 102 PB - Elsevier, Amsterdam VL - 339 SN - 0009-2541, 0009-2541 KW - United States KW - Cuddy Valley KW - Cuyama Basin KW - isotopes KW - isotope ratios KW - C-13/C-12 KW - Big Bend KW - Mil Potrero Valley KW - hydrogeology KW - stable isotopes KW - ground water KW - gases KW - carbon dioxide KW - California KW - volatiles KW - Southern California KW - San Andreas Fault KW - noble gases KW - carbon KW - helium KW - He-4/He-3 KW - chemical composition KW - geochemistry KW - 21:Hydrogeology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1316374683?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Volatile+fluxes+through+the+Big+Bend+section+of+the+San+Andreas+Fault%2C+California%3B+helium+and+carbon+dioxide+systematics&rft.au=Kulongoski%2C+Justin+T%3BHilton%2C+David+R%3BBarry%2C+Peter+H%3BEsser%2C+Bradley+K%3BHillegonds%2C+Darren%3BBelitz%2C+Kenneth&rft.aulast=Kulongoski&rft.aufirst=Justin&rft.date=2013-02-15&rft.volume=339&rft.issue=&rft.spage=92&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2012.09.007 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 110 N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2013-03-14 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - Big Bend; C-13/C-12; California; carbon; carbon dioxide; chemical composition; Cuddy Valley; Cuyama Basin; gases; geochemistry; ground water; He-4/He-3; helium; hydrogeology; isotope ratios; isotopes; Mil Potrero Valley; noble gases; San Andreas Fault; Southern California; stable isotopes; United States; volatiles DO - http://dx.doi.org/10.1016/j.chemgeo.2012.09.007 ER - TY - CPAPER T1 - Recapturing a Future for Space Exploration: Research for a New Era T2 - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AN - 1369228483; 6213710 JF - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AU - Cantwell, Elizabeth Y1 - 2013/02/14/ PY - 2013 DA - 2013 Feb 14 KW - Exploration UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1369228483?accountid=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=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.atitle=Recapturing+a+Future+for+Space+Exploration%3A+Research+for+a+New+Era&rft.au=Cantwell%2C+Elizabeth&rft.aulast=Cantwell&rft.aufirst=Elizabeth&rft.date=2013-02-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.issn=&rft_id=info:doi/ L2 - http://aaas.confex.com/aaas/2013/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-31 N1 - Last updated - 2013-06-19 ER - TY - CPAPER T1 - The Pathway to Laser Inertial Fusion Energy (LIFE) T2 - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AN - 1369227817; 6213352 JF - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AU - Dunne, Mike Y1 - 2013/02/14/ PY - 2013 DA - 2013 Feb 14 KW - Energy KW - Lasers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1369227817?accountid=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=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.atitle=The+Pathway+to+Laser+Inertial+Fusion+Energy+%28LIFE%29&rft.au=Dunne%2C+Mike&rft.aulast=Dunne&rft.aufirst=Mike&rft.date=2013-02-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.issn=&rft_id=info:doi/ L2 - http://aaas.confex.com/aaas/2013/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-31 N1 - Last updated - 2013-06-19 ER - TY - CPAPER T1 - The National Ignition Facility and the Ignition Campaign T2 - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AN - 1369227769; 6213348 JF - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AU - Callahan, Debra Y1 - 2013/02/14/ PY - 2013 DA - 2013 Feb 14 KW - Economics KW - Social aspects KW - Science UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1369227769?accountid=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=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.atitle=The+National+Ignition+Facility+and+the+Ignition+Campaign&rft.au=Callahan%2C+Debra&rft.aulast=Callahan&rft.aufirst=Debra&rft.date=2013-02-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.issn=&rft_id=info:doi/ L2 - http://aaas.confex.com/aaas/2013/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-31 N1 - Last updated - 2013-06-19 ER - TY - JOUR T1 - Quantitative In Silico analysis of transient metabolism of acetaminophen and associated causes of hepatotoxicity in humans AN - 1732836911; PQ0002207653 AB - Purpose: Although safe at therapeutic levels, excess intake of acetaminophen can lead to hepatic injury or acute liver failure (ALF). A number of different factors influence metabolism and hepatotoxicity of acetaminophen in patients. Three of the most important are a patient's physiological response to fasting, alcohol consumption, and chronic acetaminophen consumption. The molecular and enzymatic underpinnings for these processes have been extensively studied. The purpose of this study is to examine and quantify the effects of the noted conditions, provide possible reasons for conflicting clinical observations, and examine dangers associated with uptake of therapeutic doses of acetaminophen. Methods: In order to gain a better understanding of the transient hepatic changes associated with each physiological and nutritional process, examine risks of ALF associated with individuals based on their unique lifestyle and health issues, and predict improved dosing strategies, a multi-compartmented physiologically-based pharmacokinetic (PBPK) model of acetaminophen metabolism in adult humans was developed. By varying the parameters of this model, changes in metabolism of acetaminophen and its toxic byproducts for a variety of medically relevant conditions were assessed. Results: Simulated results indicate that in case of chronic ingestion of acetaminophen, the increased rate of glucuronidation plays a significant role in protecting patients from liver damage following uptake of excessive quantities. Analysis of metabolism of acetaminophen in persons who have imbibed excessive amounts of alcohol show that the primary reason for hepatotoxicity in such individuals is decreased availability of glutathione in the liver and not the observed increased production of toxic byproducts. When the glutathione depleting effects of alcohol consumption are combined with those associated with chronic acetaminophen use, intake of slightly higher quantities than the recommended therapeutic doses of acetaminophen can result in initiation of hepatotoxicity. Conclusions: The results of simulations show that, in healthy and well-fed individuals, chronic uptake of acetaminophen doses even five times the therapeutic recommendations should be safe. However, in persons who have diminished hepatic glutathione regeneration capacities, depending on the magnitude of this deleterious shortcoming, minor overdoses can result in hepatotoxicity. Hence, it can be concluded that for such persons, acetaminophen is just as toxic as any other compound that would generate reactive oxidative species. JF - In Silico Pharmacology AU - Navid, Ali AU - Ng, David M AU - Stewart, Benjamin J AU - Wong, Sergio E AU - Lightstone, Felice C AD - Biosciences & Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, USA, navid1@llnl.gov PY - 2013 SP - 1 EP - 12 PB - Springer Science & Business Media, Berlin/Heidelberg VL - 1 IS - 1 KW - Toxicology Abstracts KW - Liver diseases KW - Injuries KW - Glutathione KW - Fasting KW - hepatotoxicity KW - Pharmacokinetics KW - Models KW - Overdose KW - Liver KW - Acetaminophen KW - Metabolism KW - Ethanol KW - X 24380:Social Poisons & Drug Abuse UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732836911?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxicologyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=In+Silico+Pharmacology&rft.atitle=Quantitative+In+Silico+analysis+of+transient+metabolism+of+acetaminophen+and+associated+causes+of+hepatotoxicity+in+humans&rft.au=Navid%2C+Ali%3BNg%2C+David+M%3BStewart%2C+Benjamin+J%3BWong%2C+Sergio+E%3BLightstone%2C+Felice+C&rft.aulast=Navid&rft.aufirst=Ali&rft.date=2013-02-01&rft.volume=1&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=In+Silico+Pharmacology&rft.issn=2193-9616&rft_id=info:doi/10.1186%2F2193-9616-1-14 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Number of references - 107 N1 - Last updated - 2015-12-09 N1 - SubjectsTermNotLitGenreText - Overdose; Liver diseases; Injuries; Glutathione; Liver; Fasting; Pharmacokinetics; hepatotoxicity; Metabolism; Acetaminophen; Models; Ethanol DO - http://dx.doi.org/10.1186/2193-9616-1-14 ER - TY - JOUR T1 - Active CO sub(2) reservoir management for sustainable geothermal energy extraction and reduced leakage AN - 1434021065; 18490294 AB - Subsurface storage space is gaining recognition as a commodity for industrial and energy recovery operations. Geologic carbon dioxide (CO sub(2)) sequestration (GCS), wherein supercritical CO sub(2) is injected into subsurface storage space, is under broad development in sedimentary reservoirs - particularly for hydrocarbon production, which uses supercritical CO sub(2) as part of a carbon capture utilization and sequestration (CCUS) scheme. A novel CCUS operation is presented whereby we investigate the staged deployment of a coupled geothermal energy extraction (GEE)-GCS operation in geothermal sedimentary reservoirs that re-circulates extracted fluids. We identify sedimentary resources of the continental USA that have significant temperature at depths suitable for GCS. To predict the impact of a GEE-GCS operation, a reservoir-scale semi-analytical model is used to simulate brine and CO sub(2) migration through existing leakage pathways. With the goal of integrating GEE and GCS, a well-site design exercise is undertaken, where we develop an idealized configuration for CO sub(2) and brine production/reinjection wells. Results show potential geothermal sedimentary reservoirs suitable for GEE deployment exist in the continental USA; however the characteristics of each site should be investigated through a first stage GEE-operation to determine GCS capacity. Our active CO sub(2) reservoir management simulations demonstrate a decrease in injection and reservoir overpressures, a reduced migration of CO sub(2) within the reservoir during active injection/extraction, and a reduced risk of brine and CO sub(2) migration. With the use of the developed concentric-ring well pattern, we demonstrate the longevity of thermal productivity from an ideal GEE site, while providing sufficient CO sub(2) storage volume and trapping to act as a sequestration operation. [copy 2013 Society of Chemical Industry and John Wiley & Sons, Ltd JF - Greenhouse Gases: Science and Technology AU - Elliot, Thomas R AU - Buscheck, Thomas A AU - Celia, Michael AD - Lawrence Livermore National Laboratory, Geochemcial, Hydrological, and Environmental Sciences Group, Livermore, CA, USA., elliot.thomas.r@gmail.com Y1 - 2013/02// PY - 2013 DA - Feb 2013 SP - 50 EP - 65 PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 3 IS - 1 SN - 2152-3878, 2152-3878 KW - Meteorological & Geoastrophysical Abstracts; Risk Abstracts; Environment Abstracts KW - USA KW - Carbon dioxide KW - Reservoirs KW - M2 556.15:Water Storage (556.15) KW - R2 23050:Environment KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434021065?accountid=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=Greenhouse+Gases%3A+Science+and+Technology&rft.atitle=Active+CO+sub%282%29+reservoir+management+for+sustainable+geothermal+energy+extraction+and+reduced+leakage&rft.au=Elliot%2C+Thomas+R%3BBuscheck%2C+Thomas+A%3BCelia%2C+Michael&rft.aulast=Elliot&rft.aufirst=Thomas&rft.date=2013-02-01&rft.volume=3&rft.issue=1&rft.spage=50&rft.isbn=&rft.btitle=&rft.title=Greenhouse+Gases%3A+Science+and+Technology&rft.issn=21523878&rft_id=info:doi/10.1002%2Fghg.1328 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Last updated - 2014-02-11 N1 - SubjectsTermNotLitGenreText - Reservoirs; Carbon dioxide; USA DO - http://dx.doi.org/10.1002/ghg.1328 ER - TY - JOUR T1 - Geologic control of jet formation on Comet 103P/Hartley 2 AN - 1347459246; 2013-038437 AB - The EPOXI mission flyby of Comet 103P/Hartley 2 revealed numerous discrete dust jets extending from the nucleus, thereby providing an unprecedented opportunity to visually connect these features to the nuclear surface. The observed distribution of jets yields fresh insight into the conditions under which these cometary features may form. This study examines the geomorphology associated with areas of jet activity and then applies observed topographic correlations in the construction of a 2-D hydrodynamic model of a single dust jet. Visible light images of Hartley 2 show correlations between specific surface structures with both narrow-angle and fan-shaped dust jets; associations include pits, arcuate depressions, scarps, and rimless depressions. Notably, many source regions for jets appear finer than the practical mapping resolution of the imaging instruments ( approximately 12 m). This observation indicates that the processes controlling jet formation operate at significantly finer scales than the resolution of most cometary activity models and motivates a complementary numerical investigation of dust jet formation and evolution. In order to assess controlling variables, our parametric numerical study incorporates different geometries and volatile abundances for the observed source regions. Results indicate that the expression of jet activity not only depends on local topography but also contributes to the evolution and development of surface features. Heterogeneous distributions of volatiles within the nucleus also may contribute to differences in local styles of jet activity. JF - Icarus AU - Syal, Megan Bruck AU - Schulz, Peter H AU - Sunshine, Jessica M AU - A'Hearn, Michael F AU - Farnham, Tony L AU - Dearborn, David S P Y1 - 2013/02// PY - 2013 DA - February 2013 SP - 610 EP - 624 PB - Elsevier, New York, NY VL - 222 IS - 2 SN - 0019-1035, 0019-1035 KW - carbon dioxide KW - Hartley 2 Comet KW - mass movements KW - surface features KW - hydrodynamics KW - heterogeneity KW - vents KW - water KW - cometary nucleus KW - numerical models KW - pits KW - dust jets KW - two-dimensional models KW - geometry KW - models KW - slumping KW - volatiles KW - terrains KW - comets KW - solar radiation KW - depressions KW - scarps KW - cometary dust KW - EPOXI Mission KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1347459246?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geologic+control+of+jet+formation+on+Comet+103P%2FHartley+2&rft.au=Syal%2C+Megan+Bruck%3BSchulz%2C+Peter+H%3BSunshine%2C+Jessica+M%3BA%27Hearn%2C+Michael+F%3BFarnham%2C+Tony+L%3BDearborn%2C+David+S+P&rft.aulast=Syal&rft.aufirst=Megan&rft.date=2013-02-01&rft.volume=222&rft.issue=2&rft.spage=610&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2012.11.040 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 60 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2013-05-02 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - carbon dioxide; cometary dust; cometary nucleus; comets; depressions; dust jets; EPOXI Mission; geometry; Hartley 2 Comet; heterogeneity; hydrodynamics; mass movements; models; numerical models; pits; scarps; slumping; solar radiation; surface features; terrains; two-dimensional models; vents; volatiles; water DO - http://dx.doi.org/10.1016/j.icarus.2012.11.040 ER - TY - JOUR T1 - Geophysical limits to global wind power AN - 1291605642; 17659632 AB - There is enough power in Earth's winds to be a primary source of near-zero-emission electric power as the global economy continues to grow through the twenty-first century. Historically, wind turbines are placed on Earth's surface, but high-altitude winds are usually steadier and faster than near-surface winds, resulting in higher average power densities. Here, we use a climate model to estimate the amount of power that can be extracted from both surface and high-altitude winds, considering only geophysical limits. We find wind turbines placed on Earth's surface could extract kinetic energy at a rate of at least 400TW, whereas high-altitude wind power could extract more than 1,800TW. At these high rates of extraction, there are pronounced climatic consequences. However, we find that at the level of present global primary power demand ( 18TW; ref. ), uniformly distributed wind turbines are unlikely to substantially affect the Earth's climate. It is likely that wind power growth will be limited by economic or environmental factors, not global geophysical limits. JF - Nature Climate Change AU - Marvel, Kate AU - Kravitz, Ben AU - Caldeira, Ken AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, PO Box 808, L-103 Livermore, California 94551, USA Y1 - 2013/02// PY - 2013 DA - February 2013 SP - 118 EP - 121 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 3 IS - 2 SN - 1758-678X, 1758-678X KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts; Sustainability Science Abstracts KW - Historical account KW - Electric power KW - Climate models KW - Climate change KW - Environmental factors KW - Wind turbines KW - Wind power KW - Wind energy KW - Kinetics KW - Energy KW - Economics KW - Global winds KW - Geophysics KW - Earth's surface KW - Wind KW - ENA 03:Energy KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1291605642?accountid=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=Geophysical+limits+to+global+wind+power&rft.au=Marvel%2C+Kate%3BKravitz%2C+Ben%3BCaldeira%2C+Ken&rft.aulast=Marvel&rft.aufirst=Kate&rft.date=2013-02-01&rft.volume=3&rft.issue=2&rft.spage=118&rft.isbn=&rft.btitle=&rft.title=Nature+Climate+Change&rft.issn=1758678X&rft_id=info:doi/10.1038%2Fnclimate1683 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Wind turbines; Electric power; Wind power; Climate models; Climate change; Global winds; Earth's surface; Historical account; Wind energy; Energy; Kinetics; Economics; Geophysics; Environmental factors; Wind DO - http://dx.doi.org/10.1038/nclimate1683 ER - TY - JOUR T1 - Taxon-specific C/N relative use efficiency for amino acids in an estuarine community AN - 1272728258; 17563228 AB - Microbial activity plays a critical role in determining the nutrient status of an ecosystem (i.e. N or C limitation). While the balance of C/N assimilation has been measured at the whole community scale, quantitative detection of N and C assimilation from a single substrate at the scale of individual taxa has not been carried out. We recently developed Chip-SIP, a microarray and NanoSIMS-based method for linking microbial phylogeny and function that allows simultaneous measurement of 15N and 13C incorporation. Here, we measured the relative incorporation of C and N from dual-labeled substrates by individual microbial taxa in bottle incubations of samples collected from an estuary. Incubation times < 24 h were sufficient to successfully detect active microbes incorporating 15N ammonium. In subsequent experiments, we used the incorporation of labeled amino acids (AAs) as a proxy for heterotrophic activity and showed different levels of incorporation among different taxonomic groups. Taxon-specific differences in the net incorporation of AA-derived C and N indicate that the C/N relative use efficiency ranged from 0.8 to 1.4, where 1 reflects stoichiometric incorporation of C and N. Our results revealed that microbial organic matter processing is affected by taxon-specific physiological diversity, both in terms of general activity levels and in the ratio of assimilated C/N. JF - FEMS Microbiology Ecology AU - Mayali, Xavier AU - Weber, Peter K AU - Pett-Ridge, Jennifer AD - Chemical Science Division. Lawrence Livermore National Laboratory Y1 - 2013/02// PY - 2013 DA - February 2013 SP - 402 EP - 412 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 83 IS - 2 SN - 0168-6496, 0168-6496 KW - ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts; Oceanic Abstracts; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Phylogeny KW - Ammonium KW - Amino acids KW - Organic matter KW - Estuaries KW - Brackish KW - Absorption spectroscopy KW - Microbiology KW - Brackishwater environment KW - Nitrogen isotopes KW - Nutrient status KW - Ammonium compounds KW - O 1070:Ecology/Community Studies KW - Q1 08203:Taxonomy and morphology KW - A 01450:Environmental Pollution & Waste Treatment KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1272728258?accountid=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=FEMS+Microbiology+Ecology&rft.atitle=Taxon-specific+C%2FN+relative+use+efficiency+for+amino+acids+in+an+estuarine+community&rft.au=Mayali%2C+Xavier%3BWeber%2C+Peter+K%3BPett-Ridge%2C+Jennifer&rft.aulast=Mayali&rft.aufirst=Xavier&rft.date=2013-02-01&rft.volume=83&rft.issue=2&rft.spage=402&rft.isbn=&rft.btitle=&rft.title=FEMS+Microbiology+Ecology&rft.issn=01686496&rft_id=info:doi/10.1111%2Fj.1574-6941.12000.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-01-01 N1 - Last updated - 2016-02-18 N1 - SubjectsTermNotLitGenreText - Absorption spectroscopy; Amino acids; Organic matter; Microbiology; Estuaries; Brackishwater environment; Nitrogen isotopes; Ammonium compounds; Phylogeny; Ammonium; Nutrient status; Brackish DO - http://dx.doi.org/10.1111/j.1574-6941.12000.x ER - TY - JOUR T1 - INVESTIGATION OF DIELECTRONIC RECOMBINATION SATELLITE EMISSION TO Fe XVIII FOR TEMPERATURE MEASUREMENTS OF STELLAR ATMOSPHERES AN - 1709173986; PQ0001883457 AB - Dielectronic recombination satellite emission to the Fe XVIII and Fe XIX L-shell spectra have been investigated using collisional-radiative modeling of X-ray transitions near 14 [Angstrom]. Although weak, such L-shell emission may be of interest for future temperature measurements of cool stars. The diagnostic has been evaluated using X-ray data from the Capella system measured by the Chandra X-Ray Observatory. JF - Astrophysical Journal AU - Clementson, J AU - Beiersdorfer, P AD - Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, joel.clementson@ipp.mpg.de Y1 - 2013/01/20/ PY - 2013 DA - 2013 Jan 20 SP - 1 EP - 5 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 763 IS - 1 SN - 0004-637X, 0004-637X KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - atomic processes KW - line: formation KW - stars: atmospheres KW - Atmospheric pollution models KW - Temperature measurement KW - Remote sensing KW - Temperature KW - Stellar atmospheres KW - Temperature measurements KW - Capella KW - Satellites KW - Future temperatures KW - Emission measurements KW - Emissions KW - Stellar investigations KW - P 0000:AIR POLLUTION KW - M2 524:Stars, Universe (524) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709173986?accountid=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=INVESTIGATION+OF+DIELECTRONIC+RECOMBINATION+SATELLITE+EMISSION+TO+Fe+XVIII+FOR+TEMPERATURE+MEASUREMENTS+OF+STELLAR+ATMOSPHERES&rft.au=Clementson%2C+J%3BBeiersdorfer%2C+P&rft.aulast=Clementson&rft.aufirst=J&rft.date=2013-01-20&rft.volume=763&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%2F763%2F1%2F54 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Future temperatures; Atmospheric pollution models; Stellar investigations; Stellar atmospheres; Temperature measurements; Temperature measurement; Temperature; Remote sensing; Emissions; Emission measurements; Satellites; Capella DO - http://dx.doi.org/10.1088/0004-637X/763/1/54 ER - TY - CPAPER T1 - National Atmospheric Release Advisory Center Dispersion Modeling in Response to the Fukushima Daiichi Accident T2 - 93rd American Meteorological Society Annual Meeting (AMS 2013) AN - 1369228758; 6214901 JF - 93rd American Meteorological Society Annual Meeting (AMS 2013) AU - Sugiyama, Gayle AU - Nasstrom, J AU - Foster, K AU - Pobanz, B AU - Simpson, M AU - Vogt, P AU - Aluzzi, F AU - Homann, S Y1 - 2013/01/06/ PY - 2013 DA - 2013 Jan 06 KW - Accidents KW - Dispersion UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1369228758?accountid=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=93rd+American+Meteorological+Society+Annual+Meeting+%28AMS+2013%29&rft.atitle=National+Atmospheric+Release+Advisory+Center+Dispersion+Modeling+in+Response+to+the+Fukushima+Daiichi+Accident&rft.au=Sugiyama%2C+Gayle%3BNasstrom%2C+J%3BFoster%2C+K%3BPobanz%2C+B%3BSimpson%2C+M%3BVogt%2C+P%3BAluzzi%2C+F%3BHomann%2C+S&rft.aulast=Sugiyama&rft.aufirst=Gayle&rft.date=2013-01-06&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=93rd+American+Meteorological+Society+Annual+Meeting+%28AMS+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/93Annual/webprogram/meeting.html# LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-31 N1 - Last updated - 2013-06-19 ER - TY - JOUR T1 - New constraints on the timing of fayalite formation in unequilibrated ordinary chondrites AN - 1849303794; 2016-105551 JF - Annual Meeting of the Meteoritical Society AU - Jacobsen, Benjamin AU - Matzel, J E AU - Doyle, P M AU - Krot, Alexander N AU - Hutcheon, I D AU - Telus, M AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract no. 5348 PB - Meteoritical Society, [varies] VL - 76 SN - 0735-049X, 0735-049X KW - silicates KW - ordinary chondrites KW - stony meteorites KW - isotopes KW - Chainpur Meteorite KW - olivine group KW - manganese KW - stable isotopes KW - Mn-53 KW - meteorites KW - radioactive isotopes KW - chronology KW - fayalite KW - orthosilicates KW - chondrites KW - chromium KW - unequilibrated ordinary chondrites KW - isotope ratios KW - LL chondrites KW - thermal metamorphism KW - Cr-53 KW - metamorphism KW - Mn-55/Mn-53 KW - Mn/Cr KW - nesosilicates KW - metals KW - chondrules KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849303794?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=New+constraints+on+the+timing+of+fayalite+formation+in+unequilibrated+ordinary+chondrites&rft.au=Jacobsen%2C+Benjamin%3BMatzel%2C+J+E%3BDoyle%2C+P+M%3BKrot%2C+Alexander+N%3BHutcheon%2C+I+D%3BTelus%2C+M%3BAnonymous&rft.aulast=Jacobsen&rft.aufirst=Benjamin&rft.date=2013-01-01&rft.volume=76&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/metsoc2013/pdf/5348.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 76th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 9 N1 - SuppNotes - Accessed on Apr. 13, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - Chainpur Meteorite; chondrites; chondrules; chromium; chronology; Cr-53; fayalite; isotope ratios; isotopes; LL chondrites; manganese; metals; metamorphism; meteorites; Mn-53; Mn-55/Mn-53; Mn/Cr; nesosilicates; olivine group; ordinary chondrites; orthosilicates; radioactive isotopes; silicates; stable isotopes; stony meteorites; thermal metamorphism; unequilibrated ordinary chondrites ER - TY - JOUR T1 - Origin of asteroidal water; constraints from isotopic compositions of aqueously-formed minerals AN - 1849298519; 2016-105574 JF - Annual Meeting of the Meteoritical Society AU - Krot, Alexander N AU - Doyle, P M AU - Nagashima, K AU - Jogo, K AU - Wakita, S AU - Ciesla, F J AU - Hutcheon, I D AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract no. 5161 PB - Meteoritical Society, [varies] VL - 76 SN - 0735-049X, 0735-049X KW - silicates KW - stony meteorites KW - oxygen KW - asteroids KW - isotopes KW - olivine group KW - CV chondrites KW - manganese KW - stable isotopes KW - Mn-53 KW - CO chondrites KW - meteorites KW - radioactive isotopes KW - water-rock interaction KW - fayalite KW - orthosilicates KW - oxides KW - chondrites KW - chromium KW - water KW - CI chondrites KW - accretion KW - parent bodies KW - Cr-53 KW - carbonaceous chondrites KW - nesosilicates KW - aqueous alteration KW - metals KW - hydrogen KW - CM chondrites KW - carbonates KW - magnetite KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849298519?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Origin+of+asteroidal+water%3B+constraints+from+isotopic+compositions+of+aqueously-formed+minerals&rft.au=Krot%2C+Alexander+N%3BDoyle%2C+P+M%3BNagashima%2C+K%3BJogo%2C+K%3BWakita%2C+S%3BCiesla%2C+F+J%3BHutcheon%2C+I+D%3BAnonymous&rft.aulast=Krot&rft.aufirst=Alexander&rft.date=2013-01-01&rft.volume=76&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/metsoc2013/pdf/5161.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 76th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 14 N1 - SuppNotes - Accessed on Apr. 25, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - accretion; aqueous alteration; asteroids; carbonaceous chondrites; carbonates; chondrites; chromium; CI chondrites; CM chondrites; CO chondrites; Cr-53; CV chondrites; fayalite; hydrogen; isotopes; magnetite; manganese; metals; meteorites; Mn-53; nesosilicates; olivine group; orthosilicates; oxides; oxygen; parent bodies; radioactive isotopes; silicates; stable isotopes; stony meteorites; water; water-rock interaction ER - TY - JOUR T1 - Heterogeneity of Mg isotopes and variable (super 26) Al/ (super 27) Al ratio in FUN CAIs AN - 1844924633; 2016-103019 JF - Annual Meeting of the Meteoritical Society AU - Park, C AU - Nagashima, K AU - Hutcheon, I D AU - Wasserburg, G J AU - Papanastassiou, D A AU - Davis, A M AU - Huss, G R AU - Krot, A N AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract no. 5085 PB - Meteoritical Society, [varies] VL - 76 SN - 0735-049X, 0735-049X KW - FUN CAIs KW - alkaline earth metals KW - magnesium KW - stony meteorites KW - ion probe data KW - isotopes KW - isotope ratios KW - calcium-aluminum inclusions KW - mass spectra KW - carbonaceous chondrites KW - stable isotopes KW - solar nebula KW - meteorites KW - radioactive isotopes KW - Mg-26/Mg-24 KW - metals KW - aluminum KW - inclusions KW - Al-27/Al-26 KW - spectra KW - heterogeneity KW - chondrites KW - calcium-aluminum inclusions with fractionation and unidentifed nuclear effects KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1844924633?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Heterogeneity+of+Mg+isotopes+and+variable+%28super+26%29+Al%2F+%28super+27%29+Al+ratio+in+FUN+CAIs&rft.au=Park%2C+C%3BNagashima%2C+K%3BHutcheon%2C+I+D%3BWasserburg%2C+G+J%3BPapanastassiou%2C+D+A%3BDavis%2C+A+M%3BHuss%2C+G+R%3BKrot%2C+A+N%3BAnonymous&rft.aulast=Park&rft.aufirst=C&rft.date=2013-01-01&rft.volume=76&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/metsoc2013/pdf/5085.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 76th 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 June 3, 2016 N1 - Last updated - 2016-12-01 N1 - SubjectsTermNotLitGenreText - Al-27/Al-26; alkaline earth metals; aluminum; calcium-aluminum inclusions; calcium-aluminum inclusions with fractionation and unidentifed nuclear effects; carbonaceous chondrites; chondrites; FUN CAIs; heterogeneity; inclusions; ion probe data; isotope ratios; isotopes; magnesium; mass spectra; metals; meteorites; Mg-26/Mg-24; radioactive isotopes; solar nebula; spectra; stable isotopes; stony meteorites ER - TY - JOUR T1 - Calcium carbonate polymorphs on mica substrates and their interfacial free energies; implications for mineral trapping mechanisms in geologic CO (sub 2) sequestration AN - 1832673881; 768087-28 JF - Program and Abstracts - Annual Meeting of the Clay Minerals Society AU - Li, Qingyun AU - Lee, Byeongdu AU - Fernandez-Martinez, Alejandro AU - Waychunas, Glenn A AU - Jun, Young-Shin Y1 - 2013 PY - 2013 DA - 2013 SP - 147 PB - Clay Minerals Society, Aurora, CO VL - 50 SN - 1550-2244, 1550-2244 KW - silicates KW - carbon sequestration KW - silica minerals KW - muscovite KW - free energy KW - crystal growth KW - mineralogy KW - substrates KW - polymorphism KW - nucleation KW - mica group KW - interfaces KW - quartz KW - sheet silicates KW - framework silicates KW - calcium carbonate KW - crystal chemistry KW - mineral surface KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832673881?accountid=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=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.atitle=Calcium+carbonate+polymorphs+on+mica+substrates+and+their+interfacial+free+energies%3B+implications+for+mineral+trapping+mechanisms+in+geologic+CO+%28sub+2%29+sequestration&rft.au=Li%2C+Qingyun%3BLee%2C+Byeongdu%3BFernandez-Martinez%2C+Alejandro%3BWaychunas%2C+Glenn+A%3BJun%2C+Young-Shin&rft.aulast=Li&rft.aufirst=Qingyun&rft.date=2013-01-01&rft.volume=50&rft.issue=&rft.spage=147&rft.isbn=&rft.btitle=&rft.title=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.issn=15502244&rft_id=info:doi/ 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 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - calcium carbonate; carbon sequestration; crystal chemistry; crystal growth; framework silicates; free energy; interfaces; mica group; mineral surface; mineralogy; muscovite; nucleation; polymorphism; quartz; sheet silicates; silica minerals; silicates; substrates ER - TY - JOUR T1 - Computational study of energetics and defect-ordering tendencies for Y and La in UO (sub 2) AN - 1832611493; 690875-18 JF - Abstract Volume (Geological Association of Canada) AU - Solomon, J M AU - Alexandrov, V AU - Shvarevac, T Y AU - Sadigh, B AU - Navrotsky, A AU - Asta, M Y1 - 2013 PY - 2013 DA - 2013 SP - 180 PB - Geological Association of Canada, Waterloo, ON VL - 36 SN - 1716-6098, 1716-6098 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832611493?accountid=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=Computational+study+of+energetics+and+defect-ordering+tendencies+for+Y+and+La+in+UO+%28sub+2%29&rft.au=Solomon%2C+J+M%3BAlexandrov%2C+V%3BShvarevac%2C+T+Y%3BSadigh%2C+B%3BNavrotsky%2C+A%3BAsta%2C+M&rft.aulast=Solomon&rft.aufirst=J&rft.date=2013-01-01&rft.volume=36&rft.issue=&rft.spage=180&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 - 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 - Selection and treatment of data for radiocarbon calibration; an update to the International Calibration (IntCal) criteria AN - 1700099282; 2015-070452 AB - High-quality data from appropriate archives are needed for the continuing improvement of radiocarbon calibration curves. We discuss here the basic assumptions behind 14 C dating that necessitate calibration and the relative strengths and weaknesses of archives from which ca libration data are obtained. We also highlight the procedures, problems, and uncertainties involved in determining atmospheric and surface ocean 14 C/ 12 C in these archives, including a discussion of the various methods used to derive an independent absolute timescale and uncertainty. The types of data required for the current IntCal database and calibration curve model are tabulated with example JF - Radiocarbon AU - Reimer, Paula J AU - Bard, Edouard AU - Bayliss, Alex AU - Beck, J Warren AU - Blackwell, Paul G AU - Ramsey, Christopher Bronk AU - Brown, David M AU - Buck, Caitlin E AU - Edwards, R Lawrence AU - Friedrich, Michael AU - Grootes, Pieter M AU - Guilderson, Thomas P AU - Haflidason, Haflidi AU - Hajdas, Irka AU - Hatte, Christine AU - Heaton, Timothy J AU - Hogg, Alan G AU - Hughen, Konrad A AU - Kaiser, K Felix AU - Kromer, Bernd AU - Manning, Sturt W AU - Reimer, Ron W AU - Richards, David A AU - Scott, E Marian AU - Southon, John R AU - Turney, Christian S M AU - van der Plicht, Johannes Y1 - 2013 PY - 2013 DA - 2013 SP - 1923 EP - 1945 PB - University of Arizona, Tucson, AZ VL - 55 IS - 4 SN - 0033-8222, 0033-8222 KW - methods KW - Quaternary KW - isotopes KW - data processing KW - calibration KW - Cenozoic KW - radioactive isotopes KW - geochronology KW - carbon KW - data bases KW - absolute age KW - C-14 KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700099282?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Radiocarbon&rft.atitle=Selection+and+treatment+of+data+for+radiocarbon+calibration%3B+an+update+to+the+International+Calibration+%28IntCal%29+criteria&rft.au=Reimer%2C+Paula+J%3BBard%2C+Edouard%3BBayliss%2C+Alex%3BBeck%2C+J+Warren%3BBlackwell%2C+Paul+G%3BRamsey%2C+Christopher+Bronk%3BBrown%2C+David+M%3BBuck%2C+Caitlin+E%3BEdwards%2C+R+Lawrence%3BFriedrich%2C+Michael%3BGrootes%2C+Pieter+M%3BGuilderson%2C+Thomas+P%3BHaflidason%2C+Haflidi%3BHajdas%2C+Irka%3BHatte%2C+Christine%3BHeaton%2C+Timothy+J%3BHogg%2C+Alan+G%3BHughen%2C+Konrad+A%3BKaiser%2C+K+Felix%3BKromer%2C+Bernd%3BManning%2C+Sturt+W%3BReimer%2C+Ron+W%3BRichards%2C+David+A%3BScott%2C+E+Marian%3BSouthon%2C+John+R%3BTurney%2C+Christian+S+M%3Bvan+der+Plicht%2C+Johannes&rft.aulast=Reimer&rft.aufirst=Paula&rft.date=2013-01-01&rft.volume=55&rft.issue=4&rft.spage=1923&rft.isbn=&rft.btitle=&rft.title=Radiocarbon&rft.issn=00338222&rft_id=info:doi/ L2 - https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16955/pdf http://www.radiocarbon.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 35 N1 - PubXState - AZ N1 - Last updated - 2015-07-30 N1 - CODEN - RACAAT N1 - SubjectsTermNotLitGenreText - absolute age; C-14; calibration; carbon; Cenozoic; data bases; data processing; geochronology; isotopes; methods; Quaternary; radioactive isotopes ER - TY - JOUR T1 - SHCal13 Southern Hemisphere calibration, 0-50,000 years cal BP AN - 1700099175; 2015-070450 AB - The Southern Hemisphere SHCal04 radiocarbon calibration curve has been updated with the addition of new data sets extending measurements to 2145 cal BP and including the ANSTO Younger Dryas Huon pine data set. Outside the range of measured data, the curve is based upon the southern Hemisphere data sets as presented in IntCal13, with an interhemispheric offset averaging 43+ or -23 yr modeled by an autoregressive process to represent the short-term correlations in the offset JF - Radiocarbon AU - Hogg, Alan G AU - Hua, Quan AU - Blackwell, Paul G AU - Niu, Mu AU - Buck, Caitlin E AU - Guilderson, Thomas P AU - Heaton, Timothy J AU - Palmer, Jonathan G AU - Reimer, Ron W AU - Turney, Christian S M AU - Zimmerman, Susan R H Y1 - 2013 PY - 2013 DA - 2013 SP - 1889 EP - 1903 PB - University of Arizona, Tucson, AZ VL - 55 IS - 4 SN - 0033-8222, 0033-8222 KW - Southern Hemisphere KW - methods KW - Cenozoic KW - radioactive isotopes KW - Quaternary KW - geochronology KW - isotopes KW - carbon KW - absolute age KW - calibration KW - C-14 KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700099175?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Radiocarbon&rft.atitle=SHCal13+Southern+Hemisphere+calibration%2C+0-50%2C000+years+cal+BP&rft.au=Hogg%2C+Alan+G%3BHua%2C+Quan%3BBlackwell%2C+Paul+G%3BNiu%2C+Mu%3BBuck%2C+Caitlin+E%3BGuilderson%2C+Thomas+P%3BHeaton%2C+Timothy+J%3BPalmer%2C+Jonathan+G%3BReimer%2C+Ron+W%3BTurney%2C+Christian+S+M%3BZimmerman%2C+Susan+R+H&rft.aulast=Hogg&rft.aufirst=Alan&rft.date=2013-01-01&rft.volume=55&rft.issue=4&rft.spage=1889&rft.isbn=&rft.btitle=&rft.title=Radiocarbon&rft.issn=00338222&rft_id=info:doi/ L2 - https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16783/pdf http://www.radiocarbon.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 36 N1 - PubXState - AZ N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-07-30 N1 - CODEN - RACAAT N1 - SubjectsTermNotLitGenreText - absolute age; C-14; calibration; carbon; Cenozoic; geochronology; isotopes; methods; Quaternary; radioactive isotopes; Southern Hemisphere ER - TY - JOUR T1 - IntCal13 and Marine13 radiocarbon age calibration curves 0-50,000 years cal BP AN - 1700099103; 2015-070449 AB - The IntCal09 and Marine09 radio carbon calibration curves have been revised utilizing newly available and updated data sets from 14 C measurements on tree rings, plant macrofossils, speleothems, corals, and foraminifera. The calibration curves were derived from the data using the random walk model (RWM) used to generate IntCal09 and Marine09, which has been revised to account for additional uncertainties and error structures. The new curves were ratified at the 21st International Radiocarbon conference in July 2012 and are available as Supplemental Material at www.radiocarbon.org. The database can be accessed at http://intcal.qub.ac.uk/intcal13 JF - Radiocarbon AU - Reimer, Paula J AU - Bard, Edouard AU - Bayliss, Alex AU - Beck, J Warren AU - Blackwell, Paul G AU - Ramsey, Christopher Bronk AU - Buck, Caitlin E AU - Cheng, Hai AU - Edwards, R Lawrence AU - Friedrich, Michael AU - Grootes, Pieter M AU - Guilderson, Thomas P AU - Haflidason, Haflidi AU - Hajdas, Irka AU - Hatte, Christine AU - Heaton, Timothy J AU - Hoffmann, Dirk L AU - Hogg, Alan G AU - Hughen, Konrad A AU - Kaiser, K Felix AU - Kromer, Bernd AU - Manning, Sturt W AU - Niu, Mu AU - Reimer, Ron W AU - Richards, David A AU - Scott, E Marian AU - Southon, John R AU - Staff, Richard A AU - Turney, Christian S M AU - van der Plicht, Johannes Y1 - 2013 PY - 2013 DA - 2013 SP - 1869 EP - 1887 PB - University of Arizona, Tucson, AZ VL - 55 IS - 4 SN - 0033-8222, 0033-8222 KW - methods KW - Cenozoic KW - radioactive isotopes KW - Quaternary KW - geochronology KW - isotopes KW - carbon KW - absolute age KW - calibration KW - C-14 KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700099103?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Radiocarbon&rft.atitle=IntCal13+and+Marine13+radiocarbon+age+calibration+curves+0-50%2C000+years+cal+BP&rft.au=Reimer%2C+Paula+J%3BBard%2C+Edouard%3BBayliss%2C+Alex%3BBeck%2C+J+Warren%3BBlackwell%2C+Paul+G%3BRamsey%2C+Christopher+Bronk%3BBuck%2C+Caitlin+E%3BCheng%2C+Hai%3BEdwards%2C+R+Lawrence%3BFriedrich%2C+Michael%3BGrootes%2C+Pieter+M%3BGuilderson%2C+Thomas+P%3BHaflidason%2C+Haflidi%3BHajdas%2C+Irka%3BHatte%2C+Christine%3BHeaton%2C+Timothy+J%3BHoffmann%2C+Dirk+L%3BHogg%2C+Alan+G%3BHughen%2C+Konrad+A%3BKaiser%2C+K+Felix%3BKromer%2C+Bernd%3BManning%2C+Sturt+W%3BNiu%2C+Mu%3BReimer%2C+Ron+W%3BRichards%2C+David+A%3BScott%2C+E+Marian%3BSouthon%2C+John+R%3BStaff%2C+Richard+A%3BTurney%2C+Christian+S+M%3Bvan+der+Plicht%2C+Johannes&rft.aulast=Reimer&rft.aufirst=Paula&rft.date=2013-01-01&rft.volume=55&rft.issue=4&rft.spage=1869&rft.isbn=&rft.btitle=&rft.title=Radiocarbon&rft.issn=00338222&rft_id=info:doi/ L2 - https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16947/pdf http://www.radiocarbon.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 40 N1 - PubXState - AZ N1 - Document feature - illus. N1 - Last updated - 2015-07-30 N1 - CODEN - RACAAT N1 - SubjectsTermNotLitGenreText - absolute age; C-14; calibration; carbon; Cenozoic; geochronology; isotopes; methods; Quaternary; radioactive isotopes ER - TY - JOUR T1 - Improvement of seismicity parameters in the Arabian Shield and Platform using earthquake location and magnitude calibration AN - 1629940017; 2014-099819 JF - Frontiers in Earth Sciences AU - Al-Amri, Abdullah M AU - Rodgers, A J Y1 - 2013 PY - 2013 DA - 2013 SP - 281 EP - 293 PB - Springer, Heidelberg SN - 1863-4621, 1863-4621 KW - Saudi Arabia KW - localization KW - seismic intensity KW - magnitude KW - elastic waves KW - Arabian Plate KW - noise KW - Arabian Peninsula KW - accelerograms KW - plate tectonics KW - seismicity KW - Arabian Shield KW - velocity structure KW - traveltime KW - propagation KW - tectonics KW - seismic networks KW - Asia KW - earthquakes KW - seismotectonics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940017?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Frontiers+in+Earth+Sciences&rft.atitle=Improvement+of+seismicity+parameters+in+the+Arabian+Shield+and+Platform+using+earthquake+location+and+magnitude+calibration&rft.au=Al-Amri%2C+Abdullah+M%3BRodgers%2C+A+J&rft.aulast=Al-Amri&rft.aufirst=Abdullah&rft.date=2013-01-01&rft.volume=&rft.issue=&rft.spage=281&rft.isbn=9783642292781&rft.btitle=&rft.title=Frontiers+in+Earth+Sciences&rft.issn=18634621&rft_id=info:doi/10.1007%2F978-3-642-30609-9_14 L2 - http://www.springerlink.com/content/t66054 LA - English DB - GeoRef N1 - Conference title - Fifth international workshop of the Task Force on Sedimentary Basins; Lithosphere dynamics and sedimentary basins; the Arabian Plate and analogues N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 23 N1 - Last updated - 2014-12-04 N1 - SubjectsTermNotLitGenreText - accelerograms; Arabian Peninsula; Arabian Plate; Arabian Shield; Asia; earthquakes; elastic waves; localization; magnitude; noise; plate tectonics; propagation; Saudi Arabia; seismic intensity; seismic networks; seismicity; seismotectonics; tectonics; traveltime; velocity structure DO - http://dx.doi.org/10.1007/978-3-642-30609-9_14 ER - TY - JOUR T1 - Allocation of terrestrial carbon sources using (super 14) CO (sub 2) ; methods, measurement, and modeling AN - 1618131683; 2014-086303 AB - The radiocarbon content of whole air provides a theoretically ideal and now observationally proven tracer for recently added fossil-fuel-derived CO (sub 2) in the atmosphere (C (sub ff) ). Over large industrialized land areas, determination of C (sub ff) also constrains the change in CO (sub 2) due to uptake and release by the terrestrial biosphere. Here, we review the development of a Delta (super 14) CO (sub 2) measurement program and its implementation within the US portion of the NOAA Global Monitoring Division's air sampling network. The Delta (super 14) CO (sub 2) measurement repeatability is evaluated based on surveillance cylinders of whole air and equates to a C (sub ff) detection limit of < or =0.9 ppm from measurement uncertainties alone. We also attempt to quantify additional sources of uncertainty arising from non-fossil terms in the atmospheric (super 14) CO (sub 2) budget and from uncertainties in the composition of "background" air against which C (sub ff) enhancements occur. As an example of how we apply the measurements, we present estimates of the boundary layer enhancements of C (sub ff) and C (sub bio) using observations obtained from vertical airborne sampling profiles off of the northeastern US. We also present an updated time series of measurements from NOAA GMD's Niwot Ridge site at 3475 m asl in Colorado in order to characterize recent Delta (super 14) CO (sub 2) variability in the well-mixed free troposphere. JF - Radiocarbon AU - Lehman, S J AU - Miller, J B AU - Wolak, Chad AU - Southon, J R AU - Tans, P P AU - Montzka, S A AU - Sweeney, Colm AU - Andrews, Arlyn AU - LaFranchi, Brian AU - Guilderson, T P AU - Turnbull, Jocelyn C Y1 - 2013 PY - 2013 DA - 2013 SP - 1470 EP - 1474 PB - University of Arizona, Tucson, AZ VL - 55 IS - 2-3 SN - 0033-8222, 0033-8222 KW - United States KW - isotopes KW - Boulder County Colorado KW - atmosphere KW - troposphere KW - measurement KW - carbon dioxide KW - models KW - provenance KW - radioactive isotopes KW - carbon KW - tracers KW - greenhouse gases KW - C-14 KW - Colorado KW - chemical composition KW - uncertainty KW - Niwot Ridge KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618131683?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Radiocarbon&rft.atitle=Allocation+of+terrestrial+carbon+sources+using+%28super+14%29+CO+%28sub+2%29+%3B+methods%2C+measurement%2C+and+modeling&rft.au=Lehman%2C+S+J%3BMiller%2C+J+B%3BWolak%2C+Chad%3BSouthon%2C+J+R%3BTans%2C+P+P%3BMontzka%2C+S+A%3BSweeney%2C+Colm%3BAndrews%2C+Arlyn%3BLaFranchi%2C+Brian%3BGuilderson%2C+T+P%3BTurnbull%2C+Jocelyn+C&rft.aulast=Lehman&rft.aufirst=S&rft.date=2013-01-01&rft.volume=55&rft.issue=2-3&rft.spage=1470&rft.isbn=&rft.btitle=&rft.title=Radiocarbon&rft.issn=00338222&rft_id=info:doi/10.2458%2Fazu_js_rc.55.16392 L2 - http://www.radiocarbon.org/ LA - English DB - GeoRef N1 - Conference title - 21st international radiocarbon conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by Institute of Geological and Nuclear Sciences Limited (GNS Science), Lower Hutt, New Zealand N1 - Date revised - 2014-01-01 N1 - Number of references - 29 N1 - PubXState - AZ N1 - Document feature - illus. N1 - Last updated - 2014-10-30 N1 - CODEN - RACAAT N1 - SubjectsTermNotLitGenreText - atmosphere; Boulder County Colorado; C-14; carbon; carbon dioxide; chemical composition; Colorado; greenhouse gases; isotopes; measurement; models; Niwot Ridge; provenance; radioactive isotopes; tracers; troposphere; uncertainty; United States DO - http://dx.doi.org/10.2458/azu_js_rc.55.16392 ER - TY - JOUR T1 - Influence of kinetics on the oxygen isotope composition of calcite AN - 1549620050; 2014-057371 AB - Paleotemperature reconstructions rely on knowledge of the equilibrium fractionation of oxygen isotopes between aqueous solution and calcium carbonate. Although oxygen isotope separation is expected on theoretical grounds, the temperature-dependence remains uncertain because other factors, such as slow exchange of isotopes between dissolved CO (sub 2) -species and water, can obscure the temperature signal. This is problematic for crystal growth experiments on laboratory timescales and for interpreting the oxygen isotope composition of crystals formed in natural settings. We present results from experiments in which inorganic calcite is precipitated in the presence of 0.25 mu M dissolved bovine carbonic anhydrase (CA). The presence of dissolved CA accelerates oxygen isotope equilibration between the dissolved carbon species CO (sub 2) , H (sub 2) CO (sub 3) , HCO (sub 3) (super -) , CO (sub 3) (super 2-) and water, thereby eliminating this source of isotopic disequilibrium during calcite growth. The experimental results allow us to isolate kinetic oxygen isotope effects occurring at the calcite-water interface during mineral growth. The oxygen isotope composition of precipitated calcite is lighter than dissolved HCO (sub 3) (super -) yet heavier than CO (sub 3) (super 2-) at pH = 8.3. (super 18) O uptake into calcite varies with precipitation rate, but the observed rate-dependence is lower than in previous studies where calcite is not precipitated in the presence of dissolved CA. These non-equilibrium effects can be explained in terms of isotopologue-specific reaction rate coefficients. We present a framework of ion-by-ion growth of calcite that reconciles our new measurements with measurements of natural cave calcites that are the best candidate for having precipitated under near- equilibrium conditions. Our findings suggest that isotopic equilibrium between calcite and water is unlikely to have been established in laboratory experiments or in many natural settings. The use of CA in carbonate precipitation experiments offers new opportunities to refine oxygen isotope-based geothermometers and to interrogate environmental variables other than temperature that influence calcite growth rates. JF - Mineralogical Magazine AU - Watkins, J AU - Nielsen, L C AU - Ryerson, F J AU - DePaolo, D J AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 2472 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - isotope fractionation KW - experimental studies KW - oxygen KW - isotopes KW - isotope ratios KW - carbonic anhydrase KW - solutes KW - rates KW - crystal growth KW - O-18/O-16 KW - stable isotopes KW - temperature KW - calcite KW - precipitation KW - paleotemperature KW - kinetics KW - carbonates KW - 02D:Isotope geochemistry KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549620050?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Influence+of+kinetics+on+the+oxygen+isotope+composition+of+calcite&rft.au=Watkins%2C+J%3BNielsen%2C+L+C%3BRyerson%2C+F+J%3BDePaolo%2C+D+J%3BAnonymous&rft.aulast=Watkins&rft.aufirst=J&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=2472&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.23 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-07-31 N1 - SubjectsTermNotLitGenreText - calcite; carbonates; carbonic anhydrase; crystal growth; experimental studies; isotope fractionation; isotope ratios; isotopes; kinetics; O-18/O-16; oxygen; paleotemperature; precipitation; rates; solutes; stable isotopes; temperature DO - http://dx.doi.org/10.1180/minmag.2013.077.5.23 ER - TY - JOUR T1 - Impact of buoyant mantle upwellings on the surface evolution of North America; implications for topography changes in the Southwestern and Eastern U.S. AN - 1549617145; 2014-057650 AB - Seismic tomography is now widely regarded as the essential starting ingredient in any attempt to construct realistic models of the mantle convective flow and predicting a wide range of convection-related surface observables. This recognition has been the central motivation for the development of a new series of global tomography models that are derived from the simultaneous inversion of seismic and convection-related data sets that provide a highly successful reconciliation of 3-D mantle structure with the associated mantle-wide convective circulation (Simmons et al., GRL 2007, GJI 2009, JGR2010). These joint seismic-geodynamic tomography models are used in mantle convection simulations that provide detailed insights on how mass and heat transport across the mantle affect the surface dynamics of our planet, on both global and regional scales (e.g. Moucha et al., EPSL 2008; Moucha & Forte, Nat. Geosci. 2011; Glisovic et al., GJI 2012). These dynamic models reveal, in particular, the major impact of hot upwellings on the topographic evolution of our planet. We review findings for a large-scale plume upwelling under the Southwestern U.S. over the past 30 Ma that generated a topographic swell that correlates with geologic evidence for a wave of uplift that began in the central Basin and Range province and progressed under the Colorado Plateau (Moucha et al., GRL 2009). We also review recent work that shows a more geologically recent, but equally profound impact of hot upwelling mantle under the Atlantic Coast of the U.S., generating a wave of variable uplift along the Eastern seaboard since Pliocene times (Rowley et al., Sci. 2013). We finally discuss the relevance of these findings for new high-resolution images of 3-D mantle structure under the U.S. obtained from inversions of seismic data collected by the Earthscope Transportable Array. A complete dynamical interpretation of these detailed images of heterogeneity in the upper mantle under the U.S. must include the impact of the 'mantle wind': the strong large-scale flow that is generated by deep-seated buoyancy located in the lower mantle (Forte, Treatise of Geophysics 2nd Ed. 2013). The successful integration of the dynamical connections between lower-mantle structure with the new high-resolution models of upper-mantle heterogeneity is an outstanding challenge. JF - Abstracts with Programs - Geological Society of America AU - Forte, Alessandro AU - Moucha, Robert AU - Glisovic, Petar AU - Rowley, David B AU - Mitrovica, Jerry X AU - Simmons, Nathan A AU - Grand, Stephen P AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 727 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617145?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Impact+of+buoyant+mantle+upwellings+on+the+surface+evolution+of+North+America%3B+implications+for+topography+changes+in+the+Southwestern+and+Eastern+U.S.&rft.au=Forte%2C+Alessandro%3BMoucha%2C+Robert%3BGlisovic%2C+Petar%3BRowley%2C+David+B%3BMitrovica%2C+Jerry+X%3BSimmons%2C+Nathan+A%3BGrand%2C+Stephen+P%3BAnonymous&rft.aulast=Forte&rft.aufirst=Alessandro&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=727&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/2013AM/webprogram/Paper231184.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition 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 - 2014-07-31 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Delivery of typical cometary dust to the surface of the Earth AN - 1545409676; 2014-054649 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Noguchi, T AU - Ohashi, N AU - Tsujimoto, S AU - Bradley, J P AU - Nakamura, T AU - Toh, S AU - Stephan, T AU - Iwata, N AU - Imae, N AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Paper 1380 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - silicates KW - enstatite whiskers KW - olivine group KW - interplanetary dust KW - meteorites KW - East Ongul Island KW - pyroxene group KW - olivine KW - orthosilicates KW - LIME olivine KW - Syowa Station KW - enstatite KW - low-iron manganese-enriched olivine KW - chain silicates KW - glass with embedded metal and sulfide KW - porous materials KW - Dome Fuji Station KW - Queen Maud Land KW - TEM data KW - nesosilicates KW - micrometeorites KW - cosmic dust KW - comets KW - Antarctica KW - orthopyroxene KW - cometary dust KW - GEMS grains KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545409676?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Delivery+of+typical+cometary+dust+to+the+surface+of+the+Earth&rft.au=Noguchi%2C+T%3BOhashi%2C+N%3BTsujimoto%2C+S%3BBradley%2C+J+P%3BNakamura%2C+T%3BToh%2C+S%3BStephan%2C+T%3BIwata%2C+N%3BImae%2C+N%3BAnonymous&rft.aulast=Noguchi&rft.aufirst=T&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1380.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 19 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jan. 17, 2014 N1 - Last updated - 2014-07-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Antarctica; chain silicates; cometary dust; comets; cosmic dust; Dome Fuji Station; East Ongul Island; enstatite; enstatite whiskers; GEMS grains; glass with embedded metal and sulfide; interplanetary dust; LIME olivine; low-iron manganese-enriched olivine; meteorites; micrometeorites; nesosilicates; olivine; olivine group; orthopyroxene; orthosilicates; porous materials; pyroxene group; Queen Maud Land; silicates; Syowa Station; TEM data ER - TY - JOUR T1 - High-precision (super 10) Be-dating and Little Ice Age glacier advances at Steingletscher (Swiss Alps) AN - 1545407062; 2014-025447 AB - The increase in sensitivity of the cosmogenic (super 10) Be technique now provides novel insights into glacier and climate change by giving dates throughout the Holocene and up to present day from moraines around the globe. We show the first (super 10) Be chronology for Steingletscher in the Central Swiss Alps (47 degrees N, approximately 2000 m altitude), consisting of 30 boulder ages. The chronology includes early Holocene glacier positions, which most likely reflect glacier responses to abrupt cold spells identified in other Northern Hemisphere paleoclimate records. On the younger inner moraines, fourteen (super 10) Be boulder ages from individual ridges are in stratigraphic order ranging from 170 to 530 years. We relate these boulder ages to glacier advances during the Little Ice Age (LIA, 14 (super th) to 19 (super th) century in the Swiss Alps). Two samples from moraine ridges inside the LIA limit of Steingletscher yield ages of 170 + or - 10 years and 130 + or - 10 years. These latter samples potentially allow for quantification of the amount of (super 10) Be inherited during prior periods of exposure, on the order of a thousand atoms per gram. Our (super 10) Be data from boulders deposited during the last millennium are based on quartz samples as small as 5 g, facilitating routine processing for (super 10) Be dating even on such young samples. Comparing the Steingletscher data with other emerging (super 10) Be chronologies of recent glacier advances, we will discuss the current analytical limits of (super 10) Be dating together with the relevance of cosmogenic nuclide inheritance and other sources of natural uncertainty for the overall sensitivity of (super 10) Be surface exposure dating. JF - Mineralogical Magazine AU - Schimmelpfennig, Irene AU - Schaefer, Joerg M AU - Akcar, Naki AU - Ivy-Ochs, Susan AU - Finkel, Robert AU - Zimmerman, Susan AU - Schluechter, Christian AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 2153 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - Little Ice Age KW - glaciation KW - isotopes KW - Alps KW - Europe KW - Holocene KW - exposure age KW - Switzerland KW - Cenozoic KW - radioactive isotopes KW - geochronology KW - Central Europe KW - sediments KW - moraines KW - alkaline earth metals KW - boulders KW - precision KW - Steingletscher KW - Quaternary KW - Be-10 KW - clastic sediments KW - Swiss Alps KW - Neoglacial KW - metals KW - upper Holocene KW - beryllium KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545407062?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=High-precision+%28super+10%29+Be-dating+and+Little+Ice+Age+glacier+advances+at+Steingletscher+%28Swiss+Alps%29&rft.au=Schimmelpfennig%2C+Irene%3BSchaefer%2C+Joerg+M%3BAkcar%2C+Naki%3BIvy-Ochs%2C+Susan%3BFinkel%2C+Robert%3BZimmerman%2C+Susan%3BSchluechter%2C+Christian%3BAnonymous&rft.aulast=Schimmelpfennig&rft.aufirst=Irene&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=2153&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.19 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-07-17 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Alps; Be-10; beryllium; boulders; Cenozoic; Central Europe; clastic sediments; Europe; exposure age; geochronology; glaciation; Holocene; isotopes; Little Ice Age; metals; moraines; Neoglacial; precision; Quaternary; radioactive isotopes; sediments; Steingletscher; Swiss Alps; Switzerland; upper Holocene DO - http://dx.doi.org/10.1180/minmag.2013.077.5.19 ER - TY - JOUR T1 - Resetting and disturbance to the Al-Mg system in Allende type B CAIs AN - 1542646587; 2014-047741 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Jacobsen, B AU - Wasserburg, G J AU - McKeegan, K D AU - Hutcheon, I D AU - Krot, A N AU - Yin, Q Z AU - Matzel, J E AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Paper 2941 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - sorosilicates KW - silicates KW - B-type calcium aluminum inclusions KW - magnesium KW - stony meteorites KW - ion probe data KW - isotopes KW - calcium-aluminum inclusions KW - mass spectra KW - CV chondrites KW - stable isotopes KW - Allende Meteorite KW - meteorites KW - melilite group KW - Al-26 KW - radioactive isotopes KW - pyroxene group KW - whole rock KW - melilite KW - aluminum KW - inclusions KW - orthosilicates KW - oxides KW - spectra KW - chondrites KW - chain silicates KW - alkaline earth metals KW - isotope ratios KW - spinel KW - carbonaceous chondrites KW - Al/Mg KW - Mg-26/Mg-24 KW - metals KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542646587?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Resetting+and+disturbance+to+the+Al-Mg+system+in+Allende+type+B+CAIs&rft.au=Jacobsen%2C+B%3BWasserburg%2C+G+J%3BMcKeegan%2C+K+D%3BHutcheon%2C+I+D%3BKrot%2C+A+N%3BYin%2C+Q+Z%3BMatzel%2C+J+E%3BAnonymous&rft.aulast=Jacobsen&rft.aufirst=B&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/2941.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 18 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Nov. 7, 2013 N1 - Last updated - 2014-07-04 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Al-26; Al/Mg; alkaline earth metals; Allende Meteorite; aluminum; B-type calcium aluminum inclusions; calcium-aluminum inclusions; carbonaceous chondrites; chain silicates; chondrites; CV chondrites; inclusions; ion probe data; isotope ratios; isotopes; magnesium; mass spectra; melilite; melilite group; metals; meteorites; Mg-26/Mg-24; orthosilicates; oxides; pyroxene group; radioactive isotopes; silicates; sorosilicates; spectra; spinel; stable isotopes; stony meteorites; whole rock ER - TY - JOUR T1 - Last glacial maximum lake level oscillations in the Mono Basin, CA AN - 1542645450; 2014-051122 AB - Like all hydrographically closed water bodies of the North American Great Basin, Mono Lake in eastern California fluctuated widely through the late Quaternary in response to changes in inflow and evaporation. Mono's fluctuations are recorded both geomorphically (as stranded shorelines), and stratigraphically (as sedimentary sections exposed in the faces of wave-cut cliffs, and along the channel walls of deeply incised streams). Such exposures, up to several km in length, reveal up to 85 vertical meters of alternating glacio-fluvial and glacio-lacustrine sediments intercalated with 19-plus locally erupted volcanic ashes. This sequence of glacially- and volcanically-derived sediments deposited in a high standing, though widely fluctuating, lake constitutes the Wilson Creek Formation of Lajoie (1968, Berkeley Ph.D. thesis). We are in the process of dating the Wilson Creek Formation based on U/Th analysis of clean, dense carbonate, and on C-14 analysis of terrestrial macrofossils. Our stratigraphic observations so far require that the global Last Glacial Maximum ( approximately 33-19 kyr), though punctuated by one substantial lake highstand, was broadly characterized by times when the lake was shrinking-namely, a lowstand of 1,975 meters sometime between approximately 23 and 20.6 kyr. Shortly after attaining that low level, the lake rose dramatically, reaching 2,155 meters-its highest level of Marine Isotope Stage 2. We tentatively conclude that throughout most of the period of regional (i.e. Sierra Nevada) glacier and global ice sheet growth, the Mono Basin's climate was cold and relatively dry. By dating samples that we have already collected from critical elevations in the Mono Basin, we expect to further clarify the timing of persistently dry conditions that drove the low lake levels; and of the shift in the atmospheric circulation that forced the lake to its Marine Isotope Stage 2 highstand. JF - Abstracts with Programs - Geological Society of America AU - Ali, Guleed A H AU - Zimmerman, Susan H AU - Wang, Xianfeng AU - Hemming, Sidney R AU - Stine, Scott AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 711 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542645450?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Last+glacial+maximum+lake+level+oscillations+in+the+Mono+Basin%2C+CA&rft.au=Ali%2C+Guleed+A+H%3BZimmerman%2C+Susan+H%3BWang%2C+Xianfeng%3BHemming%2C+Sidney+R%3BStine%2C+Scott%3BAnonymous&rft.aulast=Ali&rft.aufirst=Guleed+A&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=711&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/2013AM/webprogram/Paper228143.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition 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 - 2014-07-04 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Interpreting the evolution of Earth's surface topography in terms of mantle convection AN - 1535203796; 2014-038375 AB - The present-day topography of the Earth may be interpreted as the superposition of two long-term contributions: the first originating from the isostatic compensation of lateral changes in crustal thickness with minor contributions from density and the second from the dynamic vertical stresses on the surface generated by the convecting mantle. Short-term transient topography changes due to isostatic disequilibrium, particularly from glacial adjustment (i.e. GIA), represent a third contribution. While changes in crustal structure (mainly through tectonism, erosion and deposition) will produce time-dependent changes in the first contribution, we will focus here on the temporal evolution of the second contribution: namely the changing vertical stresses generated by the highly time-dependent convective circulation in the mantle. Our ability to understand the impact of convection dynamics deep inside the mantle on time-dependent surface topography has made substantial progress over the past few years (e.g. Moucha et al., EPSL 2008; Spasojevic et al., GRL 2008). Recent progress has been achieved thanks to advances in tomographic imaging of the 3-D structure in the Earth's interior by simultaneously inverting global seismic, geodynamic and mineral physical data sets (Simmons et al., GJI 2009, JGR 2010). The most recent tomography-based simulations of mantle convection reveal the surprisingly large and crucial role of large-scale hot, active upwellings in controlling not only the heat flow across the mantle but also the topographic evolution of our planet. These tomography-based convection models are providing new views on how deep-mantle dynamics affects the surface evolution of our planet (Glisovic et al., GJI 2012). As we demonstrate, the convective contributions to surface topography are large and rapidly changing: generating as much as 2 km of topography in the East African Rift over the past 30 million years (Moucha & Forte, Nat. Geosci. 2011). These rapid changes due to the buoyancy of hot mantle are also shown to be fundamental to the interpretation of the topographic evolution of the U.S. East Coast since the mid-Pliocene (Rowley et al., Sci. 2013). JF - Abstracts with Programs - Geological Society of America AU - Forte, Alessandro M AU - Moucha, Robert AU - Rowley, David B AU - Glisovic, Petar AU - Mitrovica, Jerry X AU - Simmons, Nathan A AU - Grand, Stephen P AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 31 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - United States KW - tomography KW - East African Rift KW - topography KW - rift zones KW - landform evolution KW - mantle KW - Africa KW - Eastern U.S. KW - convection KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535203796?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Interpreting+the+evolution+of+Earth%27s+surface+topography+in+terms+of+mantle+convection&rft.au=Forte%2C+Alessandro+M%3BMoucha%2C+Robert%3BRowley%2C+David+B%3BGlisovic%2C+Petar%3BMitrovica%2C+Jerry+X%3BSimmons%2C+Nathan+A%3BGrand%2C+Stephen+P%3BAnonymous&rft.aulast=Forte&rft.aufirst=Alessandro&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=31&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/2013AM/webprogram/Paper231015.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition 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 - 2014-06-13 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Africa; convection; East African Rift; Eastern U.S.; landform evolution; mantle; rift zones; tomography; topography; United States ER - TY - JOUR T1 - Mapping soil carbon from cradle to grave; C transformations from roots to organo-mineral associations AN - 1529797293; 2014-034254 AB - Carbon cycling in the rhizosphere is a nexus of biophysical interactions between plant roots, microorganisms, and the soil organo-mineral matrix. Plant roots provide 30-40% of soil organic C inputs, accelerate the rate of organic matter mineralization by approximately 10X, and support an active microhabitat for microbial transformation of soil C. Our research on how roots influence decomposition of soil organic matter in both simplified and complex microcosms uses geochemical characterization, molecular microbiology, isotope tracing, metabolomics and novel imaging approaches ('ChipSIP' and 'STXM-SIMS') to trace the fate of isotopically labelled root exudates and plant tissues. Our work in synthetic rhizospheres suggests root exudates drive O (sub 2) limitation, alter metal chemistry and mineralogy, and influence the availability of SOM. Using a combination of X-ray spectromicroscopy and NanoSIMS, we have imaged the deconstruction of (super 13) C/ (super 15) N-labeled ligno-cellulose in model plant cells in situ, and mapped associations of plant cell-derived decomposition products with specific soil minerals. In the more complex rhizospheres surrounding roots of the annual grass Avena fatua, the microbial community undergoes a compositional succession as the plant grows, senesces, and dies. We have developed an isotope array that allows us to follow root C into bacterial, fungal, and microfaunal communities. The presence of root detritus significantly alters the soil microbial community over short time spans, leading to a higher proportion of eukaryotic microbes and Bacteroidetes. Finally, we have characterized the molecular cocktail of compounds exuded by Avena roots, and showed that increased belowground C allocation and root biomass driven by elevated CO (sub 2) correspond to a greater amount of root-derived (super 13) C in the 'heavy' soil fraction, commonly assumed to reflect longer term stabilization. JF - Mineralogical Magazine AU - Pett-Ridge, Jennifer AU - Keiluweit, Marco AU - Shi, Shenging AU - Nuccio, Erin AU - Bougoure, Jeremy AU - Weber, Peter K AU - Brodie, Eoin AU - Mayali, Xavier AU - Kleber, Markus AU - Nico, Peter S AU - Firestone, Mary AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 1961 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - Avena fatua KW - ion probe data KW - isotopes KW - polysaccharides KW - mass spectra KW - rhizosphere KW - mapping KW - detritus KW - stable isotopes KW - nitrogen KW - carbon dioxide KW - Avena KW - fungi KW - carbon KW - Bacteroidetes KW - carbohydrates KW - spectra KW - organic carbon KW - soils KW - matrix KW - N-15 KW - X-ray spectra KW - geochemical cycle KW - organic compounds KW - cellulose KW - bacteria KW - C-13 KW - carbon cycle KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529797293?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Mapping+soil+carbon+from+cradle+to+grave%3B+C+transformations+from+roots+to+organo-mineral+associations&rft.au=Pett-Ridge%2C+Jennifer%3BKeiluweit%2C+Marco%3BShi%2C+Shenging%3BNuccio%2C+Erin%3BBougoure%2C+Jeremy%3BWeber%2C+Peter+K%3BBrodie%2C+Eoin%3BMayali%2C+Xavier%3BKleber%2C+Markus%3BNico%2C+Peter+S%3BFirestone%2C+Mary%3BAnonymous&rft.aulast=Pett-Ridge&rft.aufirst=Jennifer&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=1961&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.16 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-08-14 N1 - SubjectsTermNotLitGenreText - Avena fatua; bacteria; Bacteroidetes; C-13; carbohydrates; carbon; carbon cycle; carbon dioxide; cellulose; detritus; fungi; geochemical cycle; ion probe data; isotopes; mapping; mass spectra; matrix; N-15; nitrogen; organic carbon; organic compounds; polysaccharides; rhizosphere; soils; spectra; stable isotopes; X-ray spectra; Avena DO - http://dx.doi.org/10.1180/minmag.2013.077.5.16 ER - TY - JOUR T1 - Experimental study of accretion and early differentiation of the Earth AN - 1529794521; 2014-036084 AB - The pattern of siderophile (iron-loving) element abundance in the silicate portion of the Earth is a consequence of metal separation during core formation. Thermodynamic expressions used to constrain the metal-silicate partitioning behavior of siderophile elements are mainly established from large volume press experiments that do not cover the full range of potential P-T conditions for core-mantle equilibrium. Using the laser-heated diamond anvil cell technique, we have extended metal-silicate partitioning measurements to 75 GPa and 4400 K, exceeding the liquidus temperatures for both metal and silicate and, therefore, achieving thermodynamic conditions directly equivalent to the full range of P-T conditions relevant to metal-silicate equilibration at the base of a deep magma ocean. Partitioning results obtained for siderophile elements (Ni, Co, V, Cr, Mn, Nb) and light elements (Si, O) are used to constrain a mechanism for terrestrial accretion and core formation reconciling the observed mantle concentrations of V, Cr and geophysical constraints on light elements in the core. The experiments were performed in the P-T ranges of 35-74 GPa and 3100-4400 K. The metal-silicate partition coefficients for nickel and cobalt decrease with increasing pressure and reach the values required to yield present mantle concentrations at approximately 50 GPa [1]. Enhanced solubility of oxygen in the metal perturbs the metal-silicate partitioning of V and Cr, precluding extrapolation of previous results (Siebert et al. 2013). We will present new continuous core formation models for different redox paths showing that terrestrial accretion under highly reduced conditions as proposed by most core formation models [3, 4] could be reconsidered. JF - Mineralogical Magazine AU - Siebert, Julien AU - Badro, James AU - Antonangeli, Daniele AU - Ryerson, Frederick J AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 2211 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - models KW - partitioning KW - experimental studies KW - patterns KW - accretion KW - differentiation KW - core KW - siderophile elements KW - thermodynamic properties KW - P-T conditions KW - measurement KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529794521?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Experimental+study+of+accretion+and+early+differentiation+of+the+Earth&rft.au=Siebert%2C+Julien%3BBadro%2C+James%3BAntonangeli%2C+Daniele%3BRyerson%2C+Frederick+J%3BAnonymous&rft.aulast=Siebert&rft.aufirst=Julien&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=2211&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.19 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 4 N1 - Last updated - 2014-05-29 N1 - SubjectsTermNotLitGenreText - accretion; core; differentiation; experimental studies; measurement; models; P-T conditions; partitioning; patterns; siderophile elements; thermodynamic properties DO - http://dx.doi.org/10.1180/minmag.2013.077.5.19 ER - TY - JOUR T1 - Holocene history of Mono Lake from multiple sediment cores AN - 1529794315; 2014-036451 AB - Great Basin lakes are sensitive recorders of climatic change, due to the arid climate and highly fragmented topography. Geomorphic and sedimentologic evidence of lake-level changes during the last approximately 2000 years and through the last glacial cycle in the Mono Basin has been studied extensively, but the history of the Basin between approximately 12,000 and approximately 2,000 years ago is poorly known. Geomorphic and outcrop evidence is removed or hidden in this interval, and while geochemical, sedimentological, and biological proxies in sediment cores can provide continuous records of hydroclimate, they can be challenging to interpret correctly. In deep-lake sediments of the last glaciation in the Mono Basin, carbonate concentration is high when the lake level is high (Zimmerman et al., 2011, GSAB). Similarly, bands of fine-grained aragonite in Holocene deep-water cores (17 and 34 m water depth) likely indicate increased flux of Ca (super 2+) -bearing freshwater, perhaps mediated by stratification and overturn. In shallower cores (2-3 m water depth), high concentrations of carbonate apparently indicate regression and approach of shoreline processes to the core site, bringing coarse biogenic carbonate, aragonite flakes, and weathered tufa fragments. Some caution must be applied in the interpretation of facies changes in cores from the western embayment of Mono Lake, as even Holocene lake levels may have a component of tectonic offset. Lake levels were highest during the early Holocene ( approximately 10,600-7,000 yr BP), where even the shallow cores are laminated mud. Between 8000 and 3000 yr BP the proportion of shallow carbonate layers increases, indicating an overall progression toward drier conditions, but with at least one sustained wet interval just after 3900 cal BP. This is followed by the lowest sustained lake indicated in the shallow cores, a >20 cm thick section of nearly pure coarse carbonate debris, possibly including a hiatus, and likely responsible for the Scholl terrace at 1940-1941 m elevation (Stine, 1990; PPP). This is followed by fine-grained unit indicating transgression by 2055 (+245/-160) cal yr BP. All of the shallow cores are capped by an interval of carbonate sand, likely the result of increasing lake level over the last 20 years. JF - Abstracts with Programs - Geological Society of America AU - Zimmerman, Susan H AU - Hemming, Sidney R AU - Starratt, Scott W AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 551 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529794315?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Holocene+history+of+Mono+Lake+from+multiple+sediment+cores&rft.au=Zimmerman%2C+Susan+H%3BHemming%2C+Sidney+R%3BStarratt%2C+Scott+W%3BAnonymous&rft.aulast=Zimmerman&rft.aufirst=Susan&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=551&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/2013AM/webprogram/Paper231677.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition 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 - 2014-05-29 N1 - CODEN - GAAPBC ER - TY - BOOK T1 - (super 14) C-based emission estimates for halocarbons and other greenhouse gases across the U.S. AN - 1524637492; 694745-4 JF - Earth System Research Laboratory (U.S.); 41st Global monitoring conference AU - Montzka, S AU - Miller, J AU - Lehman, S AU - Andrews, A E AU - Sweeney, C AU - Miller, B AU - Chen, H AU - Hu, L AU - Wolak, C AU - Dlugokencky, E AU - Southon, J AU - Turnbull, J C AU - LaFranchi, B AU - Guilderson, T AU - Fischer, M AU - Tans, P AU - Elkins, J AU - Hall, B D AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 34 PB - NOAA, Earth System Research Laboratory, Boulder, CO KW - radioactive isotopes KW - isotopes KW - carbon KW - greenhouse gases KW - C-14 KW - emissivity KW - carbon dioxide KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524637492?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=Montzka%2C+S%3BMiller%2C+J%3BLehman%2C+S%3BAndrews%2C+A+E%3BSweeney%2C+C%3BMiller%2C+B%3BChen%2C+H%3BHu%2C+L%3BWolak%2C+C%3BDlugokencky%2C+E%3BSouthon%2C+J%3BTurnbull%2C+J+C%3BLaFranchi%2C+B%3BGuilderson%2C+T%3BFischer%2C+M%3BTans%2C+P%3BElkins%2C+J%3BHall%2C+B+D%3BAnonymous&rft.aulast=Montzka&rft.aufirst=S&rft.date=2013-01-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=%28super+14%29+C-based+emission+estimates+for+halocarbons+and+other+greenhouse+gases+across+the+U.S.&rft.title=%28super+14%29+C-based+emission+estimates+for+halocarbons+and+other+greenhouse+gases+across+the+U.S.&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Earth System Research Laboratory (U.S.); 41st Global monitoring conference 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 - PubXState - CO N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Accurate measurement of diffusion profiles in altered wellbore cement using XMCT AN - 1510395176; 2014-019503 AB - Recent, intense effort has been focused on characterizing and modeling the degradation of wellbore cements exposed to CO (sub 2) -rich brines due to their role in geologic carbon storage. Scanning electron microscopy (SEM) and micro X-ray computed micro-tomography (XCMT) show the development of three discrete alteration layers in the reacted wellbore cement: a portlandite depleted zone, a Ca-carbonate zone, and an amorphous zone. Alteration models have assumed discrete, sharp contacts between these layers where the chemistry and mineralogy change drastically. Despite the power of XCMT to provide detailed 3D images of these alteration zones, little has been done to refine the geometrical models of wellbore cement alteration using these data. Interpretation of XCMT images of wellbore cement can be problematic given the large distribution in grain and pore sizes as well as similarities of the mineral compositions and densities. Application of simple grayscale thresholds to XCMT data to identify alteration zones is problematic because of the zones span a narrow range in composition and density. Instead of thresholding, we rely on an advanced user-guided segmentation method which extracts the reaction zones by looking for not only differences in greyscale, but also in texture. This method allows us to more accurately define reaction boundaries and their extent in three dimensions. With the reaction zone extents as guides, we take the analysis a step further and build 3D maps of mineral and elemental abundances. Using the geochemical model and specific mineral linear X-ray attenuation coefficients we calculate what phases are present and their relative abundances in each zone. The end result shows that the reaction regions are defined by rather diffuse regions where multiple reactions can occur simultaneously, rather than by sharp regions. JF - Mineralogical Magazine AU - Mason, Harris E AU - DuFrane, Wyatt L AU - Walsh, Stuart D C AU - Carroll, Susan A AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 1704 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - alteration KW - diffusion KW - three-dimensional models KW - textures KW - porosity KW - measurement KW - geometry KW - carbon dioxide KW - models KW - X-ray data KW - mineral composition KW - chemical reactions KW - brines KW - cement KW - computed tomography data KW - chemical composition KW - geochemistry KW - accuracy KW - SEM data KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510395176?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Accurate+measurement+of+diffusion+profiles+in+altered+wellbore+cement+using+XMCT&rft.au=Mason%2C+Harris+E%3BDuFrane%2C+Wyatt+L%3BWalsh%2C+Stuart+D+C%3BCarroll%2C+Susan+A%3BAnonymous&rft.aulast=Mason&rft.aufirst=Harris&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=1704&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.13 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 1 N1 - Last updated - 2014-03-27 N1 - SubjectsTermNotLitGenreText - accuracy; alteration; brines; carbon dioxide; cement; chemical composition; chemical reactions; computed tomography data; diffusion; geochemistry; geometry; measurement; mineral composition; models; porosity; SEM data; textures; three-dimensional models; X-ray data DO - http://dx.doi.org/10.1180/minmag.2013.077.5.13 ER - TY - JOUR T1 - Origin of water on the chondrite asteroids; evidence from oxygen-isotope compositions of aqueously-formed minerals AN - 1507185498; 2014-016012 AB - Fayalite and magnetite in CV3.1 and CO3.1 carbonaceous chondrites (CCs) resulted from water-rock interaction on their parent asteroids at water/rock volume ratio of approximately 0.2 and temperatures of approximately 100-200 degrees C [1,2]. The inferred (super 53) Mn/ (super 55) Mn ratios in fayalite in Asuka 881317 (CV) and MacAlpine Hills 88107 (CO-like) are (2.77+ or -0.48)X10 (super -6) and (2.45+ or -0.33)X10 (super -6) [3] The (super 53) Mn- (super 53) Cr ages of the CV and CO fayalite formation anchored to D'Orbigny angrite [4,5] are 3.7 (+1.1/-0.9) and 4.4 (+0.9/-0.7) Ma after CV CAIs [3] having an absolute age of 4567.3+ or -0.16 Ma [6]. These ages are indistinguishable from the (super 53) Mn- (super 53) Cr ages of calcite in CMs [7] and dolomite in CMs and CIs [7,8]. The high peak metamorphic temperatures experienced by CVs and COs of petrologic type > 3.6 (>600 degrees C) and the old formation ages of fayalite imply a rapid accretion of their parent asteroids after chondrule formation ( approximately 2-2.5 Ma after CV CAIs) followed by a short onset of aqueous alteration. The accretion of CVs and COs predated by approximately 1 Ma accretion of the more extensively aqueously-altered, but less metamorphosed CMs and CIs [7,8]. Near terrestrial oxygen-isotope compositions of the CV and CO fayalite and magnetite (Delta (super 17) O approximately -1ppm), and CM and CI carbonates and magnetite (Delta (super 17) O approximately +2ppm to -3ppm) may indicate water in the CC parent asteroids had preferentially a local, inner Solar System origin, consistent with the inferred hydrogen-isotope composition of the CC asteroidal water [9]. The low influx of isotopically heavy (i.e., enriched in (super 17) O, (super 18) O, and D/H) water ices from the outer Solar System at the time of accretion of CC asteroids may be due to an early growth of Jupiter that could have prevented significant radial transport of dust and gas from outside its orbit. JF - Mineralogical Magazine AU - Krot, A N AU - Doyle, P M AU - Nagashima, K AU - Jogo, K AU - Wakita, S AU - Ciesla, F J AU - Hutcheon, I AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 1515 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - silicates KW - stony meteorites KW - oxygen KW - asteroids KW - isotopes KW - calcium-aluminum inclusions KW - olivine group KW - CV chondrites KW - stable isotopes KW - temperature KW - meteorites KW - water-rock interaction KW - fayalite KW - inclusions KW - sediments KW - orthosilicates KW - oxides KW - chondrites KW - O-17/O-16 KW - water KW - clastic sediments KW - isotope ratios KW - O-18/O-16 KW - carbonaceous chondrites KW - metamorphism KW - nesosilicates KW - D/H KW - hydrogen KW - dust KW - O-18 KW - O-17 KW - magnetite KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1507185498?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Origin+of+water+on+the+chondrite+asteroids%3B+evidence+from+oxygen-isotope+compositions+of+aqueously-formed+minerals&rft.au=Krot%2C+A+N%3BDoyle%2C+P+M%3BNagashima%2C+K%3BJogo%2C+K%3BWakita%2C+S%3BCiesla%2C+F+J%3BHutcheon%2C+I%3BAnonymous&rft.aulast=Krot&rft.aufirst=A&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=1515&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.11 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 9 N1 - Last updated - 2014-03-14 N1 - SubjectsTermNotLitGenreText - asteroids; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; clastic sediments; CV chondrites; D/H; dust; fayalite; hydrogen; inclusions; isotope ratios; isotopes; magnetite; metamorphism; meteorites; nesosilicates; O-17; O-17/O-16; O-18; O-18/O-16; olivine group; orthosilicates; oxides; oxygen; sediments; silicates; stable isotopes; stony meteorites; temperature; water; water-rock interaction DO - http://dx.doi.org/10.1180/minmag.2013.077.5.11 ER - TY - JOUR T1 - Modeling impact cratering on Phobos AN - 1502298715; 2014-012293 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Rovny, Jared AU - Owen, J Michael AU - Howley, K M AU - Wasem, J V AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 1076 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - Phobos Satellite KW - cratering KW - impact features KW - three-dimensional models KW - adaptive smoothed particle hydrodynamics KW - damage KW - friction KW - porous materials KW - impacts KW - simulation KW - Stickney Crater KW - size KW - spherical harmonic analysis KW - models KW - gravity field KW - scale models KW - hydrodynamics KW - impact craters KW - satellites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502298715?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Modeling+impact+cratering+on+Phobos&rft.au=Rovny%2C+Jared%3BOwen%2C+J+Michael%3BHowley%2C+K+M%3BWasem%2C+J+V%3BAnonymous&rft.aulast=Rovny&rft.aufirst=Jared&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1076.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Dec. 5, 2013 N1 - Last updated - 2014-02-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - adaptive smoothed particle hydrodynamics; cratering; damage; friction; gravity field; hydrodynamics; impact craters; impact features; impacts; models; Phobos Satellite; porous materials; satellites; scale models; simulation; size; spherical harmonic analysis; Stickney Crater; three-dimensional models ER - TY - JOUR T1 - Atmospheric breakup of meteoroids and the strength of Fe-Ni AN - 1502298553; 2014-012300 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Swift, D C AU - Mulford, R N AU - Chen, L AU - Milathianaki, D AU - El-Dasher, B AU - Remington, B A AU - Eakins, D AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 3090 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - fragmentation KW - penetration KW - atmospheric entry KW - strength KW - stress KW - atmosphere KW - meteoroids KW - deformation KW - simulation KW - iron KW - meteorites KW - yield strength KW - micrometeoroids KW - iron meteorites KW - metals KW - nickel KW - hydrodynamics KW - alloys KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502298553?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Atmospheric+breakup+of+meteoroids+and+the+strength+of+Fe-Ni&rft.au=Swift%2C+D+C%3BMulford%2C+R+N%3BChen%2C+L%3BMilathianaki%2C+D%3BEl-Dasher%2C+B%3BRemington%2C+B+A%3BEakins%2C+D%3BAnonymous&rft.aulast=Swift&rft.aufirst=D&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/3090.pdf LA - English DB - GeoRef N1 - Conference title - 44th 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 - SuppNotes - Accessed on Dec. 5, 2013 N1 - Last updated - 2014-02-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alloys; atmosphere; atmospheric entry; deformation; fragmentation; hydrodynamics; iron; iron meteorites; metals; meteorites; meteoroids; micrometeoroids; nickel; penetration; simulation; strength; stress; yield strength ER - TY - JOUR T1 - Influence of morphological and mechanical properties on standoff mitigation of potentially hazardous asteroids AN - 1502298448; 2014-012240 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Herbold, E B AU - Lomov, I AU - Miller, P AU - Antoun, T A AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2672 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - morphology KW - physical properties KW - mitigation KW - geologic hazards KW - asteroids KW - strength KW - natural hazards KW - mechanical properties KW - impacts KW - porosity KW - catastrophes KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502298448?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Influence+of+morphological+and+mechanical+properties+on+standoff+mitigation+of+potentially+hazardous+asteroids&rft.au=Herbold%2C+E+B%3BLomov%2C+I%3BMiller%2C+P%3BAntoun%2C+T+A%3BAnonymous&rft.aulast=Herbold&rft.aufirst=E&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/2672.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 10 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2014-02-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - asteroids; catastrophes; geologic hazards; impacts; mechanical properties; mitigation; morphology; natural hazards; physical properties; porosity; strength ER - TY - JOUR T1 - Low temperature carbonate control of barium in igneous Ca-, Al-rich inclusions AN - 1502298442; 2014-012150 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Paque, Julie M AU - Burnett, D S AU - Beckett, John R AU - Guan, Y AU - Ishii, H A AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2505 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - sorosilicates KW - silicates KW - alteration KW - stony meteorites KW - ion probe data KW - igneous rocks KW - calcium-aluminum inclusions KW - mass spectra KW - CV chondrites KW - temperature KW - meteorites KW - melilite group KW - geochemical controls KW - melilite KW - barium KW - inclusions KW - orthosilicates KW - spectra KW - chondrites KW - alkaline earth metals KW - condensation KW - Leoville Meteorite KW - carbonaceous chondrites KW - TEM data KW - metals KW - magmas KW - low temperature KW - fractional crystallization KW - carbonates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502298442?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Low+temperature+carbonate+control+of+barium+in+igneous+Ca-%2C+Al-rich+inclusions&rft.au=Paque%2C+Julie+M%3BBurnett%2C+D+S%3BBeckett%2C+John+R%3BGuan%2C+Y%3BIshii%2C+H+A%3BAnonymous&rft.aulast=Paque&rft.aufirst=Julie&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/2505.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2014-02-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; alteration; barium; calcium-aluminum inclusions; carbonaceous chondrites; carbonates; chondrites; condensation; CV chondrites; fractional crystallization; geochemical controls; igneous rocks; inclusions; ion probe data; Leoville Meteorite; low temperature; magmas; mass spectra; melilite; melilite group; metals; meteorites; orthosilicates; silicates; sorosilicates; spectra; stony meteorites; TEM data; temperature ER - TY - JOUR T1 - Overview of collisional-threat mitigation activities at Lawrence Livermore National Laboratory AN - 1502298189; 2014-012239 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Howley, K AU - Dearborn, D AU - Elliott, J AU - Gibbard, S AU - Herbold, E B AU - Lomov, I AU - Managan, R AU - Miller, P AU - Miles, A AU - Owen, M AU - Rovny, Jared AU - Schill, W AU - Wasem, J V AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2529 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - United States KW - near-Earth objects KW - geologic hazards KW - asteroids KW - explosions KW - Alameda County California KW - impacts KW - research KW - preventive measures KW - meteors KW - California KW - mitigation KW - Lawrence Livermore National Laboratory KW - natural hazards KW - nuclear explosions KW - catastrophes KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502298189?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Overview+of+collisional-threat+mitigation+activities+at+Lawrence+Livermore+National+Laboratory&rft.au=Howley%2C+K%3BDearborn%2C+D%3BElliott%2C+J%3BGibbard%2C+S%3BHerbold%2C+E+B%3BLomov%2C+I%3BManagan%2C+R%3BMiller%2C+P%3BMiles%2C+A%3BOwen%2C+M%3BRovny%2C+Jared%3BSchill%2C+W%3BWasem%2C+J+V%3BAnonymous&rft.aulast=Howley&rft.aufirst=K&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/2529.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 1 N1 - PubXState - TX N1 - Document feature - illus. N1 - Last updated - 2014-02-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Alameda County California; asteroids; California; catastrophes; explosions; geologic hazards; impacts; Lawrence Livermore National Laboratory; meteors; mitigation; natural hazards; near-Earth objects; nuclear explosions; preventive measures; research; United States ER - TY - JOUR T1 - Comparison of laser space weathering flux on the spectral changes of olivine AN - 1502298043; 2014-012206 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Markley, M M AU - Gillis-Davis, J J AU - Bradley, J P AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2770 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - silicates KW - surface properties KW - laser methods KW - optical spectra KW - olivine group KW - impacts KW - simulation KW - weathering KW - nesosilicates KW - planets KW - micrometeorites KW - meteorites KW - space weathering KW - olivine KW - orthosilicates KW - spectra KW - reflectance KW - 01B:Mineralogy of silicates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502298043?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Comparison+of+laser+space+weathering+flux+on+the+spectral+changes+of+olivine&rft.au=Markley%2C+M+M%3BGillis-Davis%2C+J+J%3BBradley%2C+J+P%3BAnonymous&rft.aulast=Markley&rft.aufirst=M&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/2770.pdf LA - English DB - GeoRef N1 - Conference title - 44th 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. incl. 1 table N1 - Last updated - 2014-02-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - impacts; laser methods; meteorites; micrometeorites; nesosilicates; olivine; olivine group; optical spectra; orthosilicates; planets; reflectance; silicates; simulation; space weathering; spectra; surface properties; weathering ER - TY - JOUR T1 - Advances in meshless modeling of material damage AN - 1502297549; 2014-012266 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Owen, J Michael AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 1047 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - cratering KW - ordinary chondrites KW - experimental studies KW - fragmentation KW - stony meteorites KW - asteroids KW - parent bodies KW - damage KW - H chondrites KW - impacts KW - fracturing KW - simulation KW - models KW - meteorites KW - laboratory studies KW - mitigation KW - natural hazards KW - petrography KW - hydrodynamics KW - applications KW - chondrites KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502297549?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Advances+in+meshless+modeling+of+material+damage&rft.au=Owen%2C+J+Michael%3BAnonymous&rft.aulast=Owen&rft.aufirst=J&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1047.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 5 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Nov. 27, 2013 N1 - Last updated - 2014-02-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - applications; asteroids; chondrites; cratering; damage; experimental studies; fracturing; fragmentation; H chondrites; hydrodynamics; impacts; laboratory studies; meteorites; mitigation; models; natural hazards; ordinary chondrites; parent bodies; petrography; regolith; simulation; stony meteorites ER - TY - JOUR T1 - Does oxygen isotopic heterogeneity in refractory inclusions and their Wark-Lovering rims record nebular reprocessing? AN - 1492589023; 2014-007111 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Simon, J I AU - Matzel, J E P AU - Simon, S B AU - Weber, P K AU - Grossman, L AU - Ross, D K AU - Hutcheon, I D AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 1828 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - sorosilicates KW - silicates KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - refractory materials KW - mass spectra KW - CV chondrites KW - stable isotopes KW - Allende Meteorite KW - meteorites KW - melilite group KW - melilite KW - Wark-Lovering rims KW - inclusions KW - orthosilicates KW - spectra KW - heterogeneity KW - chondrites KW - O-17/O-16 KW - secondary minerals KW - isotope ratios KW - parent bodies KW - carbonaceous chondrites KW - solar nebula KW - Efremovka Meteorite KW - NanoSIMS KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492589023?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Does+oxygen+isotopic+heterogeneity+in+refractory+inclusions+and+their+Wark-Lovering+rims+record+nebular+reprocessing%3F&rft.au=Simon%2C+J+I%3BMatzel%2C+J+E+P%3BSimon%2C+S+B%3BWeber%2C+P+K%3BGrossman%2C+L%3BRoss%2C+D+K%3BHutcheon%2C+I+D%3BAnonymous&rft.aulast=Simon&rft.aufirst=J&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1828.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 12 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 25, 2013 N1 - Last updated - 2014-01-30 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Allende Meteorite; carbonaceous chondrites; chondrites; CV chondrites; Efremovka Meteorite; heterogeneity; inclusions; ion probe data; isotope ratios; isotopes; mass spectra; melilite; melilite group; meteorites; NanoSIMS; O-17/O-16; orthosilicates; oxygen; parent bodies; refractory materials; secondary minerals; silicates; solar nebula; sorosilicates; spectra; stable isotopes; stony meteorites; Wark-Lovering rims ER - TY - JOUR T1 - A young age for KREEP formation determined from Lu-Hf isotope systematics of KREEP basalts and Mg-suite samples AN - 1492588908; 2014-007129 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gaffney, A M AU - Borg, L E AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 1714 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - Sample 78238 KW - Sample 72275 KW - irradiation KW - volcanic rocks KW - isotopes KW - igneous rocks KW - mass spectra KW - Apollo Program KW - Lu/Hf KW - plutonic rocks KW - chronology KW - dates KW - basalts KW - absolute age KW - Sample 77215 KW - spectra KW - Sample 15386 KW - norite KW - Hadean KW - magma oceans KW - Precambrian KW - Moon KW - magmatism KW - models KW - ICP mass spectra KW - magnesian suite KW - lunar samples KW - KREEP KW - neutrons KW - gabbros KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492588908?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+young+age+for+KREEP+formation+determined+from+Lu-Hf+isotope+systematics+of+KREEP+basalts+and+Mg-suite+samples&rft.au=Gaffney%2C+A+M%3BBorg%2C+L+E%3BAnonymous&rft.aulast=Gaffney&rft.aufirst=A&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1714.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 19 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 27, 2013 N1 - Last updated - 2014-01-30 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; Apollo Program; basalts; chronology; dates; gabbros; Hadean; ICP mass spectra; igneous rocks; irradiation; isotopes; KREEP; Lu/Hf; lunar samples; magma oceans; magmatism; magnesian suite; mass spectra; models; Moon; neutrons; norite; plutonic rocks; Precambrian; Sample 15386; Sample 72275; Sample 77215; Sample 78238; spectra; volcanic rocks ER - TY - JOUR T1 - Pressure-induced insertion of xenon into a small-pore zeolite natrolite AN - 1492587928; 2014-005836 AB - We report here a novel mechanism of xenon incorporation into a zeolite at moderate upper mantle PT conditiions. When silver-exchanged natrolite, Ag16Al16Si24O48 .16H2O, a small pore auxetic zeolite is compressed under xenon medium to ca. 1.7 GPa and heated to ca. 250 degrees celcius, significant amount of xenon is incorporated into the natrolite channel via desorptiion of water molecules and charge dispropornation of silver cations, resulting in ca. Ar8Al16Si24O80 . 8Xe. This material is recovered to ambient conditions with ca. 4% larger unit cell compared to the starting material. This process has been monitored by in situ high-pressure synchrotron XRD, and the presence of xenon and the formation of charge-disproportionated silver metal nano particles have been confirmed by XRF chemical analysis and TEM imaging from the recovered sample. Xenon incorporation under moderate pressure into Auxetic framework silicate such as natrolite is an important and overlooked confinement mechanism of heavy noble gases in geochemical environment. JF - Mineralogical Magazine AU - Seoung, Donghoon AU - Lee, Yongmoon AU - Cynn, Hyunchae AU - Evans, William AU - Vogt, Thomas AU - Kao, Chi-Chang AU - Lee, Yongjae AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 1574 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - silicates KW - upper mantle KW - pressure KW - silver KW - mantle KW - substitution KW - xenon KW - TEM data KW - natrolite KW - noble gases KW - metals KW - zeolite group KW - X-ray fluorescence spectra KW - framework silicates KW - spectra KW - geochemistry KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492587928?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Pressure-induced+insertion+of+xenon+into+a+small-pore+zeolite+natrolite&rft.au=Seoung%2C+Donghoon%3BLee%2C+Yongmoon%3BCynn%2C+Hyunchae%3BEvans%2C+William%3BVogt%2C+Thomas%3BKao%2C+Chi-Chang%3BLee%2C+Yongjae%3BAnonymous&rft.aulast=Seoung&rft.aufirst=Donghoon&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=1574&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.12 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-01-30 N1 - SubjectsTermNotLitGenreText - framework silicates; geochemistry; mantle; metals; natrolite; noble gases; pressure; silicates; silver; spectra; substitution; TEM data; upper mantle; X-ray fluorescence spectra; xenon; zeolite group DO - http://dx.doi.org/10.1180/minmag.2013.077.5.12 ER - TY - JOUR T1 - The origin of young mare basalts inferred from lunar meteorites NWA 4734, NWA 032, and LAP 02205 AN - 1492585877; 2014-007134 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Elardo, S M AU - Shearer, C K AU - Fagan, A L AU - Borg, L E AU - Gaffney, A M AU - Burger, P V AU - Neal, C R AU - McCubbin, F M AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2762 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - Northwest Africa Meteorites KW - lunar meteorites KW - volcanic rocks KW - stony meteorites KW - isotopes KW - igneous rocks KW - partial melting KW - LaPaz Icefield Meteorites KW - mantle KW - LAP 02205 KW - stable isotopes KW - Rb/Sr KW - meteorites KW - dates KW - cumulates KW - basalts KW - absolute age KW - Archean KW - rare earths KW - alkaline earth metals KW - magma oceans KW - Precambrian KW - Moon KW - isotope ratios KW - NWA 4734 KW - NWA 032 KW - maria KW - achondrites KW - Sr-87/Sr-86 KW - KREEP KW - Sm/Nd KW - metals KW - petrography KW - mare basalts KW - strontium KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492585877?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+origin+of+young+mare+basalts+inferred+from+lunar+meteorites+NWA+4734%2C+NWA+032%2C+and+LAP+02205&rft.au=Elardo%2C+S+M%3BShearer%2C+C+K%3BFagan%2C+A+L%3BBorg%2C+L+E%3BGaffney%2C+A+M%3BBurger%2C+P+V%3BNeal%2C+C+R%3BMcCubbin%2C+F+M%3BAnonymous&rft.aulast=Elardo&rft.aufirst=S&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/2762.pdf LA - English DB - GeoRef N1 - Conference title - 44th 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 June 27, 2013 N1 - Last updated - 2014-01-30 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; alkaline earth metals; Archean; basalts; cumulates; dates; igneous rocks; isotope ratios; isotopes; KREEP; LAP 02205; LaPaz Icefield Meteorites; lunar meteorites; magma oceans; mantle; mare basalts; maria; metals; meteorites; Moon; Northwest Africa Meteorites; NWA 032; NWA 4734; partial melting; petrography; Precambrian; rare earths; Rb/Sr; Sm/Nd; Sr-87/Sr-86; stable isotopes; stony meteorites; strontium; volcanic rocks ER - TY - JOUR T1 - Evidence for widespread magmatic activity at 4.36 Ga in the lunar highlands from young ages determined on troctolite 76535 AN - 1492585702; 2014-007126 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Borg, Lars AU - Connelly, James AU - Cassata, William AU - Gaffney, Amy M AU - Carlson, Richard AU - Papanastassiou, Dimitri AU - Wasserburg, Jerry AU - Ramon, Erick AU - Lindval, Rachael AU - Bizarro, Martin AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 1563 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - silicates KW - igneous rocks KW - olivine group KW - lunar highlands KW - thermal history KW - Rb/Sr KW - pyroxene group KW - plutonic rocks KW - melting KW - dates KW - olivine KW - orthosilicates KW - absolute age KW - framework silicates KW - chain silicates KW - Pb/Pb KW - plagioclase KW - magma oceans KW - Moon KW - Sample 76535 KW - magmatism KW - isochrons KW - nesosilicates KW - lunar samples KW - troctolite KW - Sm/Nd KW - gabbros KW - feldspar group KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492585702?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Evidence+for+widespread+magmatic+activity+at+4.36+Ga+in+the+lunar+highlands+from+young+ages+determined+on+troctolite+76535&rft.au=Borg%2C+Lars%3BConnelly%2C+James%3BCassata%2C+William%3BGaffney%2C+Amy+M%3BCarlson%2C+Richard%3BPapanastassiou%2C+Dimitri%3BWasserburg%2C+Jerry%3BRamon%2C+Erick%3BLindval%2C+Rachael%3BBizarro%2C+Martin%3BAnonymous&rft.aulast=Borg&rft.aufirst=Lars&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1563.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 20 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 27, 2013 N1 - Last updated - 2014-01-30 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; chain silicates; dates; feldspar group; framework silicates; gabbros; igneous rocks; isochrons; lunar highlands; lunar samples; magma oceans; magmatism; melting; Moon; nesosilicates; olivine; olivine group; orthosilicates; Pb/Pb; plagioclase; plutonic rocks; pyroxene group; Rb/Sr; Sample 76535; silicates; Sm/Nd; thermal history; troctolite ER - TY - JOUR T1 - Rb-Sr, Sm-Nd and Lu-Hf isotope systematics of norite 77215; refining the age and duration of lunar crust formation AN - 1492584435; 2014-007125 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Carlson, R W AU - Borg, L AU - Gaffney, A M AU - Boyet, M AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 1621 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - silicates KW - ordinary chondrites KW - stony meteorites KW - isotopes KW - igneous rocks KW - mass spectra KW - Rb/Sr KW - meteorites KW - Lu/Hf KW - pyroxene group KW - plutonic rocks KW - chronology KW - whole rock KW - dates KW - absolute age KW - Sample 77215 KW - framework silicates KW - spectra KW - norite KW - chondrites KW - chain silicates KW - plagioclase KW - Moon KW - isochrons KW - ICP mass spectra KW - lunar samples KW - Sm/Nd KW - lunar crust KW - gabbros KW - feldspar group KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492584435?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Rb-Sr%2C+Sm-Nd+and+Lu-Hf+isotope+systematics+of+norite+77215%3B+refining+the+age+and+duration+of+lunar+crust+formation&rft.au=Carlson%2C+R+W%3BBorg%2C+L%3BGaffney%2C+A+M%3BBoyet%2C+M%3BAnonymous&rft.aulast=Carlson&rft.aufirst=R&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1621.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 14 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 27, 2013 N1 - Last updated - 2014-01-30 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; chain silicates; chondrites; chronology; dates; feldspar group; framework silicates; gabbros; ICP mass spectra; igneous rocks; isochrons; isotopes; Lu/Hf; lunar crust; lunar samples; mass spectra; meteorites; Moon; norite; ordinary chondrites; plagioclase; plutonic rocks; pyroxene group; Rb/Sr; Sample 77215; silicates; Sm/Nd; spectra; stony meteorites; whole rock ER - TY - JOUR T1 - Comparisons of Martian and Antarctic alteration; a transmission electron microscope study of MIL 090032 AN - 1492584204; 2014-007102 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Hallis, L J AU - Ishii, H A AU - Bradley, J P AU - Taylor, G J AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 1735 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - silicates KW - alteration KW - terrestrial environment KW - nakhlite KW - stony meteorites KW - iddingsite KW - Martian meteorites KW - Mars KW - gels KW - SNC Meteorites KW - meteorites KW - sedimentary rocks KW - water-rock interaction KW - gypsum KW - Miller Range Meteorites KW - colloidal materials KW - chemically precipitated rocks KW - sulfates KW - amorphous materials KW - MIL 090032 KW - veins KW - evaporites KW - achondrites KW - weathering KW - TEM data KW - terrestrial planets KW - jarosite KW - aqueous alteration KW - planets KW - Antarctica KW - sheet silicates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492584204?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Comparisons+of+Martian+and+Antarctic+alteration%3B+a+transmission+electron+microscope+study+of+MIL+090032&rft.au=Hallis%2C+L+J%3BIshii%2C+H+A%3BBradley%2C+J+P%3BTaylor%2C+G+J%3BAnonymous&rft.aulast=Hallis&rft.aufirst=L&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1735.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 25, 2013 N1 - Last updated - 2014-01-30 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - achondrites; alteration; amorphous materials; Antarctica; aqueous alteration; chemically precipitated rocks; colloidal materials; evaporites; gels; gypsum; iddingsite; jarosite; Mars; Martian meteorites; meteorites; MIL 090032; Miller Range Meteorites; nakhlite; planets; sedimentary rocks; sheet silicates; silicates; SNC Meteorites; stony meteorites; sulfates; TEM data; terrestrial environment; terrestrial planets; veins; water-rock interaction; weathering ER - TY - JOUR T1 - Oxygen isotope measurements of a rare Murchison type A CAI and its rim AN - 1492583528; 2014-007110 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Mazel, J E P AU - Simon, J I AU - Hutcheon, I D AU - Jacobsen, B AU - Simon, S B AU - Grossman, L AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2632 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - sorosilicates KW - silicates KW - magnesium KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - calcium-aluminum inclusions KW - perovskite KW - mass spectra KW - stable isotopes KW - Murchison Meteorite KW - meteorites KW - melilite group KW - melilite KW - Wark-Lovering rims KW - inclusions KW - orthosilicates KW - oxides KW - spectra KW - chondrites KW - O-17/O-16 KW - alkaline earth metals KW - isotope ratios KW - spinel KW - hibonite KW - carbonaceous chondrites KW - solar nebula KW - Mg-26/Mg-24 KW - metals KW - petrography KW - NanoSIMS KW - CM chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492583528?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Oxygen+isotope+measurements+of+a+rare+Murchison+type+A+CAI+and+its+rim&rft.au=Mazel%2C+J+E+P%3BSimon%2C+J+I%3BHutcheon%2C+I+D%3BJacobsen%2C+B%3BSimon%2C+S+B%3BGrossman%2C+L%3BAnonymous&rft.aulast=Mazel&rft.aufirst=J+E&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/2632.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 10 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 25, 2013 N1 - Last updated - 2014-05-15 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; CM chondrites; hibonite; inclusions; ion probe data; isotope ratios; isotopes; magnesium; mass spectra; melilite; melilite group; metals; meteorites; Mg-26/Mg-24; Murchison Meteorite; NanoSIMS; O-17/O-16; orthosilicates; oxides; oxygen; perovskite; petrography; silicates; solar nebula; sorosilicates; spectra; spinel; stable isotopes; stony meteorites; Wark-Lovering rims ER - TY - JOUR T1 - Laser space weathering of Allende Meteorite AN - 1469621666; 2013-097664 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Gillis-Davis, Jeffrey J AU - Lucey, P G AU - Bradley, J P AU - Ishii, H A AU - Connolly, H C, Jr AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2070 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - carbonaceous composition KW - experimental studies KW - irradiation KW - C-type asteroids KW - stony meteorites KW - laser methods KW - asteroids KW - optical spectra KW - carbonaceous chondrites KW - CV chondrites KW - weathering KW - infrared spectra KW - Allende Meteorite KW - meteorites KW - absorption KW - space weathering KW - weathered materials KW - ultraviolet spectra KW - spectra KW - chondrites KW - reflectance KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469621666?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+space+weathering+of+Allende+Meteorite&rft.au=Gillis-Davis%2C+Jeffrey+J%3BLucey%2C+P+G%3BBradley%2C+J+P%3BIshii%2C+H+A%3BConnolly%2C+H+C%2C+Jr%3BAnonymous&rft.aulast=Gillis-Davis&rft.aufirst=Jeffrey&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/2494.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 9 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Sept. 2, 2013 N1 - Last updated - 2013-12-20 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absorption; Allende Meteorite; asteroids; C-type asteroids; carbonaceous chondrites; carbonaceous composition; chondrites; CV chondrites; experimental studies; infrared spectra; irradiation; laser methods; meteorites; optical spectra; reflectance; space weathering; spectra; stony meteorites; ultraviolet spectra; weathered materials; weathering ER - TY - JOUR T1 - Evidence for supernova injection into the solar nebula and the decoupling of r-process nucleosynthesis AN - 1469617249; 2013-100519 AB - Variations in the non-radiogenic isotope abundances of meteoritic materials have long been interpreted as nucleosynthetic signatures resulting from the input of distinct materials produced from p-, s-, and r-processes. Previous studies of the Solar System's first solids, calcium-aluminum-rich inclusions (CAIs), have demonstrated that isotopic compositions of various elements differ from terrestrial compositions and may be modeled using addition or subtraction of different nucleosynthetic components. However, these studies did not determine the isotopic compositions of multiple elements spanning a large mass range in the same CAIs. We present for the first time an integrated study of Sr, Mo, Ba, Nd, and Sm isotope compositions determined on multiple coarse- and fine-grained CAIs from the Allende CV3 chondrite. The data demonstrate that the isotopic compositions of these elements in CAIs are uniform and yet distinct from the average Solar System, necessitating that CAIs were formed in a homogenous and isotopically distinct reservoir. Taken in whole, the observed mass-independent anomalies cannot be explained by: (1) presence of presolar components, (2) simple addition/subtraction of r-process nuclides, (3) incomplete digestion of the sample, (4) nuclear field shift fractionation, or (5) neutron capture. Relative to terrestrial standards, CAIs contain positive r-process anomalies in isotopes A140. Previous work has suggested that multiple supernova sources are required to account for the proportions of short-lived isotopes in the early Solar System. The fundamental difference in the isotopic character of CAIs around mass 140 is consistent with and necessitates (1) the existence of multiple sources for r-process nucleosynthesis, and (2) the injection of supernova material into a reservoir untapped by CAIs. JF - Mineralogical Magazine AU - Brennecka, G A AU - Borg, L E AU - Wadhwa, M AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 768 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - solar nebula KW - mineral inclusions KW - stars KW - supernovas KW - inclusions KW - planetology KW - nucleosynthesis KW - geochemistry KW - decoupling KW - calcium aluminum rich inclusions KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469617249?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Evidence+for+supernova+injection+into+the+solar+nebula+and+the+decoupling+of+r-process+nucleosynthesis&rft.au=Brennecka%2C+G+A%3BBorg%2C+L+E%3BWadhwa%2C+M%3BAnonymous&rft.aulast=Brennecka&rft.aufirst=G&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=768&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.2 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2013-01-01 N1 - Number of references - 9 N1 - Last updated - 2013-12-20 N1 - SubjectsTermNotLitGenreText - calcium aluminum rich inclusions; decoupling; geochemistry; inclusions; mineral inclusions; nucleosynthesis; planetology; solar nebula; stars; supernovas DO - http://dx.doi.org/10.1180/minmag.2013.077.5.2 ER - TY - BOOK T1 - CO (sub 2) capture and sequestration AN - 1458523127; 685735-2 JF - Fossil energy; selected entries from the encyclopedia of sustainability science and technology AU - Friedmann, S Julio Y1 - 2013 PY - 2013 DA - 2013 PB - Springer, New York, NY SN - 9781461457213 KW - carbon capture and storage KW - technology KW - monitoring KW - underground storage KW - underground installations KW - risk assessment KW - policy KW - reservoir rocks KW - carbon dioxide KW - 29B:Economic geology, economics of energy sources KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1458523127?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=Friedmann%2C+S+Julio&rft.aulast=Friedmann&rft.aufirst=S&rft.date=2013-01-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=9781461457213&rft.btitle=CO+%28sub+2%29+capture+and+sequestration&rft.title=CO+%28sub+2%29+capture+and+sequestration&rft.issn=&rft_id=info:doi/10.1007%2F978-1-4614-5722-0_16 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 Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany N1 - Number of references - 86 N1 - PubXState - NY N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1007/978-1-4614-5722-0_16 ER - TY - JOUR T1 - The age of Tissint; Sm-Nd and Rb-Sr isotope systematics of a Martian meteorite fall AN - 1400620769; 2013-057271 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Brennecka, G A AU - Borg, L E AU - Symes, S J K AU - Wadhwa, M AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract No. 1786 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - stony meteorites KW - isotopes KW - Martian meteorites KW - stable isotopes KW - Rb/Sr KW - SNC Meteorites KW - meteorites KW - radioactive isotopes KW - Sm-147/Nd-144 KW - dates KW - absolute age KW - samarium KW - rare earths KW - alkaline earth metals KW - isotope ratios KW - achondrites KW - meteorite falls KW - Nd-144/Nd-143 KW - Sr-87/Sr-86 KW - Tissint Meteorite KW - Nd-144/Nd-142 KW - shergottite KW - Sm/Nd KW - metals KW - neodymium KW - strontium KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1400620769?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+age+of+Tissint%3B+Sm-Nd+and+Rb-Sr+isotope+systematics+of+a+Martian+meteorite+fall&rft.au=Brennecka%2C+G+A%3BBorg%2C+L+E%3BSymes%2C+S+J+K%3BWadhwa%2C+M%3BAnonymous&rft.aulast=Brennecka&rft.aufirst=G&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1786.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 10 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 6, 2013 N1 - Last updated - 2013-07-18 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; alkaline earth metals; dates; isotope ratios; isotopes; Martian meteorites; metals; meteorite falls; meteorites; Nd-144/Nd-142; Nd-144/Nd-143; neodymium; radioactive isotopes; rare earths; Rb/Sr; samarium; shergottite; Sm-147/Nd-144; Sm/Nd; SNC Meteorites; Sr-87/Sr-86; stable isotopes; stony meteorites; strontium; Tissint Meteorite ER - TY - JOUR T1 - Petrology and chronology of early lunar crustal building; 1, Comprehensive examination of a ferroan anorthosite clast in 60016 AN - 1400615870; 2013-053856 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Shearer, C K AU - Burger, P V AU - Marks, N E AU - Borg, L E AU - Gaffney, A M AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract no. 1689 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - silicates KW - igneous rocks KW - olivine group KW - lunar breccia KW - recrystallization KW - iron KW - electron probe data KW - pyroxene group KW - plutonic rocks KW - chronology KW - whole rock KW - olivine KW - metamorphic rocks KW - orthosilicates KW - framework silicates KW - rare earths KW - trace elements KW - chain silicates KW - plagioclase KW - breccia KW - impactites KW - Moon KW - Sample 60016 KW - impact breccia KW - clasts KW - anorthosite KW - nesosilicates KW - lunar samples KW - metals KW - lunar crust KW - petrography KW - feldspar group KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1400615870?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Petrology+and+chronology+of+early+lunar+crustal+building%3B+1%2C+Comprehensive+examination+of+a+ferroan+anorthosite+clast+in+60016&rft.au=Shearer%2C+C+K%3BBurger%2C+P+V%3BMarks%2C+N+E%3BBorg%2C+L+E%3BGaffney%2C+A+M%3BAnonymous&rft.aulast=Shearer&rft.aufirst=C&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/1689.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 5 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 21, 2013 N1 - Last updated - 2013-07-18 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - anorthosite; breccia; chain silicates; chronology; clasts; electron probe data; feldspar group; framework silicates; igneous rocks; impact breccia; impactites; iron; lunar breccia; lunar crust; lunar samples; metals; metamorphic rocks; Moon; nesosilicates; olivine; olivine group; orthosilicates; petrography; plagioclase; plutonic rocks; pyroxene group; rare earths; recrystallization; Sample 60016; silicates; trace elements; whole rock ER - TY - JOUR T1 - Pre-accretional sorting of GEMS in the outer solar nebula AN - 1400615802; 2013-053806 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Wozniakiewicz, P J AU - Bradley, J P AU - Ishii, H A AU - Brownlee, D E AU - Price, M C AU - Burchell, M J AU - Kearsley, A T AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract no. 2275 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - silicates KW - STEM data KW - grain size KW - scanning transmission electron microscopy KW - porous materials KW - interplanetary dust KW - solar nebula KW - size distribution KW - cosmic dust KW - comets KW - grains KW - glass with embedded metal and sulfide grains KW - sorting KW - sulfides KW - GEMS grains KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1400615802?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Pre-accretional+sorting+of+GEMS+in+the+outer+solar+nebula&rft.au=Wozniakiewicz%2C+P+J%3BBradley%2C+J+P%3BIshii%2C+H+A%3BBrownlee%2C+D+E%3BPrice%2C+M+C%3BBurchell%2C+M+J%3BKearsley%2C+A+T%3BAnonymous&rft.aulast=Wozniakiewicz&rft.aufirst=P&rft.date=2013-01-01&rft.volume=44&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.lpi.usra.edu/meetings/lpsc2013/pdf/2275.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 13, 2013 N1 - Last updated - 2013-10-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - comets; cosmic dust; GEMS grains; glass with embedded metal and sulfide grains; grain size; grains; interplanetary dust; porous materials; scanning transmission electron microscopy; silicates; size distribution; solar nebula; sorting; STEM data; sulfides ER - TY - JOUR T1 - Hyperviscosity for unstructured ALE meshes AN - 1323257797; 17800354 AB - An artificial viscosity, originally designed for Eulerian schemes, is adapted for use in arbitrary Lagrangian-Eulerian simulations. Changes to the Eulerian model (dubbed 'hyperviscosity') are discussed, which enable it to work within a Lagrangian framework. New features include a velocity-weighted grid scale and a generalised filtering procedure, applicable to either structured or unstructured grids. The model employs an artificial shear viscosity for treating small-scale vorticity and an artificial bulk viscosity for shock capturing. The model is based on the Navier-Stokes form of the viscous stress tensor, including the diagonal rate-of-expansion tensor. A second-order version of the model is presented, in which Laplacian operators act on the velocity divergence and the grid-weighted strain-rate magnitude to ensure that the velocity field remains smooth at the grid scale. Unlike sound-speed-based artificial viscosities, the hyperviscosity model is compatible with the low Mach number limit. The new model outperforms a commonly used Lagrangian artificial viscosity on a variety of test problems. JF - International Journal of Computational Fluid Dynamics AU - Cook, Andrew W AU - Ulitsky, Mark S AU - Miller, Douglas S AD - Lawrence Livermore National Laboratory, Livermore, USA Y1 - 2013/01/01/ PY - 2013 DA - 2013 Jan 01 SP - 32 EP - 50 PB - Taylor & Francis Group Ltd., 2 Park Square Oxford OX14 4RN United Kingdom VL - 27 IS - 1 SN - 1061-8562, 1061-8562 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Shear KW - Viscosity KW - Hydrodynamics KW - Fluid dynamics KW - Velocity KW - Stress KW - Model Testing KW - Model Studies KW - SW 0810:General KW - Q2 09183:Physics and chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1323257797?accountid=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=International+Journal+of+Computational+Fluid+Dynamics&rft.atitle=Hyperviscosity+for+unstructured+ALE+meshes&rft.au=Cook%2C+Andrew+W%3BUlitsky%2C+Mark+S%3BMiller%2C+Douglas+S&rft.aulast=Cook&rft.aufirst=Andrew&rft.date=2013-01-01&rft.volume=27&rft.issue=1&rft.spage=32&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Computational+Fluid+Dynamics&rft.issn=10618562&rft_id=info:doi/10.1080%2F10618562.2012.756477 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Fluid dynamics; Shear; Viscosity; Hydrodynamics; Stress; Velocity; Model Testing; Model Studies DO - http://dx.doi.org/10.1080/10618562.2012.756477 ER - TY - JOUR T1 - Elemental composition of human semen is associated with motility and genomic sperm defects among older men AN - 1291602520; 17591686 AB - BACKGROUND Older men tend to have poorer semen quality and are generally at higher risks for infertility and abnormal reproductive outcomes. METHODS We employed proton-induced X-ray emission (PIXE, 3 MeV proton beam) to investigate the concentrations of zinc, copper, calcium, sulfur, chlorine, potassium, titanium, iron and nickel in washed sperm and seminal plasma from non-smoking groups of 10 older men (65-80 years old) and 10 younger men (22-28 years old) who were concurrently assayed for sperm function and genomicly defective sperm. RESULTS The older group showed elevated zinc, copper and calcium in sperm and elevated sulfur in seminal plasma compared with the younger men. The older group also showed reduced motility as well as increased sperm DNA fragmentation, achondroplasia mutations, DNA strand breaks and chromosomal aberrations. Sperm calcium and copper were positively associated with sperm DNA fragmentation (P < 0.03). Seminal sulfur was positively associated with sperm DNA fragmentation and chromosomal aberrations (P < 0.04), and negatively associated with sperm motility (P < 0.05). Sperm calcium was negatively associated with sperm motility, independent of male age (P = 0.01). CONCLUSIONS We identified major differences in elemental concentrations between sperm and seminal plasma and that higher sperm copper, sulfur and calcium are quantitatively associated with poorer semen quality and increased frequencies of genomic sperm defects. JF - Human Reproduction AU - Schmid, Thomas E AU - Grant, Patrick G AU - Marchetti, Francesco AU - Weldon, Rosana H AU - Eskenazi, Brenda AU - Wyrobek, Andrew J AD - 1 Biosciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, ajwyrobek@lbl.gov Y1 - 2013/01// PY - 2013 DA - Jan 2013 SP - 274 EP - 282 PB - Oxford University Press, Great Clarendon Street Oxford OX2 6DP United Kingdom VL - 28 IS - 1 SN - 0268-1161, 0268-1161 KW - Genetics Abstracts; Risk Abstracts KW - Sulfur KW - Infertility KW - Calcium KW - Nickel KW - Copper KW - Sperm KW - DNA fragmentation KW - Risk factors KW - Zinc KW - Semen KW - genomics KW - Chromosome aberrations KW - Titanium KW - Protons KW - DNA damage KW - Motility KW - Ionizing radiation KW - DNA KW - Reproduction KW - Iron KW - Mutation KW - G 07880:Human Genetics KW - R2 23060:Medical and environmental health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1291602520?accountid=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=Human+Reproduction&rft.atitle=Elemental+composition+of+human+semen+is+associated+with+motility+and+genomic+sperm+defects+among+older+men&rft.au=Schmid%2C+Thomas+E%3BGrant%2C+Patrick+G%3BMarchetti%2C+Francesco%3BWeldon%2C+Rosana+H%3BEskenazi%2C+Brenda%3BWyrobek%2C+Andrew+J&rft.aulast=Schmid&rft.aufirst=Thomas&rft.date=2013-01-01&rft.volume=28&rft.issue=1&rft.spage=274&rft.isbn=&rft.btitle=&rft.title=Human+Reproduction&rft.issn=02681161&rft_id=info:doi/10.1093%2Fhumrep%2Fdes321 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Last updated - 2013-09-09 N1 - SubjectsTermNotLitGenreText - Sulfur; Infertility; Titanium; Calcium; Protons; Nickel; Sperm; Copper; DNA fragmentation; DNA damage; Motility; Risk factors; Ionizing radiation; Zinc; Semen; genomics; Mutation; Iron; Chromosome aberrations; DNA; Reproduction DO - http://dx.doi.org/10.1093/humrep/des321 ER - TY - JOUR T1 - Radar-enabled recovery of the Sutter's Mill Meteorite, a carbonaceous chondrite regolith breccia AN - 1282824734; 2013-016256 AB - Doppler weather radar imaging enabled the rapid recovery of the Sutter's Mill meteorite after a rare 4-kiloton of TNT-equivalent asteroid impact over the foothills of the Sierra Nevada in northern California. The recovered meteorites survived a record high-speed entry of 28.6 kilometers per second from an orbit close to that of Jupiter-family comets (Tisserand's parameter = 2.8 + or - 0.3). Sutter's Mill is a regolith breccia composed of CM (Mighei)-type carbonaceous chondrite and highly reduced xenolithic materials. It exhibits considerable diversity of mineralogy, petrography, and isotope and organic chemistry, resulting from a complex formation history of the parent body surface. That diversity is quickly masked by alteration once in the terrestrial environment but will need to be considered when samples returned by missions to C-class asteroids are interpreted. JF - Science AU - Jenniskens, Peter AU - Fries, Marc D AU - Yin, Qing-Zhu AU - Zolensky, Michael AU - Krot, Alexander N AU - Sandford, Scott A AU - Sears, Derek W G AU - Beauford, Robert AU - Ebel, Denton S AU - Friedrich, Jon M AU - Nagashima, Kazuhide AU - Wimpenny, Josh AU - Yamakawa, Akane AU - Nishiizumi, Kunihiko AU - Hamajima, Yasunori AU - Caffee, Marc W AU - Welten, Kees C AU - Laubenstein, Matthias AU - Davis, Andrew M AU - Simon, Steven B AU - Heck, Philipp R AU - Young, Edward D AU - Kohl, Issaku E AU - Thiemens, Mark H AU - Nunn, Morgan H AU - Mikouchi, Takashi AU - Hagiya, Kenji AU - Ohsumi, Kazumasa AU - Cahill, Thomas A AU - Lawton, Jonathan A AU - Barnes, David AU - Steele, Andrew AU - Rochette, Pierre AU - Verosub, Kenneth L AU - Gattacceca, Jerome AU - Cooper, George AU - Glavin, Daniel P AU - Burton, Aaron S AU - Dworkin, Jason P AU - Elsila, Jamie E AU - Pizzarello, Sandra AU - Ogliore, Ryan AU - Schmitt-Kopplin, Philippe AU - Harir, Mourad AU - Hertkorn, Norbert AU - Verchovsky, Alexander AU - Grady, Monica AU - Nagao, Keisuke AU - Okazaki, Ryuji AU - Takechi, Hiroyuki AU - Hiroi, Takahiro AU - Smith, Ken AU - Silber, Elizabeth A AU - Brown, Peter G AU - Albers, Jim AU - Klotz, Doug AU - Hankey, Mike AU - Matson, Robert AU - Fries, Jeffrey A AU - Walker, Richard J AU - Puchtel, Igor AU - Lee, Cin-Ty A AU - Erdman, Monica E AU - Eppich, Gary R AU - Roeske, Sarah AU - Gabelica, Zelimir AU - Lerche, Michael AU - Nuevo, Michel AU - Girten, Beverly AU - Worden, Simon P Y1 - 2012/12/21/ PY - 2012 DA - 2012 Dec 21 SP - 1583 EP - 1587 PB - American Association for the Advancement of Science, Washington, DC VL - 338 IS - 6114 SN - 0036-8075, 0036-8075 KW - United States KW - Sierra Nevada KW - imagery KW - breccia KW - stony meteorites KW - asteroids KW - orbits KW - parent bodies KW - radar methods KW - bolides KW - Sutter's Mill Meteorite KW - carbonaceous chondrites KW - meteors KW - California KW - meteorites KW - mineral composition KW - classification KW - CM chondrites KW - chondrites KW - geochemistry KW - regolith KW - Nevada KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282824734?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Radar-enabled+recovery+of+the+Sutter%27s+Mill+Meteorite%2C+a+carbonaceous+chondrite+regolith+breccia&rft.au=Jenniskens%2C+Peter%3BFries%2C+Marc+D%3BYin%2C+Qing-Zhu%3BZolensky%2C+Michael%3BKrot%2C+Alexander+N%3BSandford%2C+Scott+A%3BSears%2C+Derek+W+G%3BBeauford%2C+Robert%3BEbel%2C+Denton+S%3BFriedrich%2C+Jon+M%3BNagashima%2C+Kazuhide%3BWimpenny%2C+Josh%3BYamakawa%2C+Akane%3BNishiizumi%2C+Kunihiko%3BHamajima%2C+Yasunori%3BCaffee%2C+Marc+W%3BWelten%2C+Kees+C%3BLaubenstein%2C+Matthias%3BDavis%2C+Andrew+M%3BSimon%2C+Steven+B%3BHeck%2C+Philipp+R%3BYoung%2C+Edward+D%3BKohl%2C+Issaku+E%3BThiemens%2C+Mark+H%3BNunn%2C+Morgan+H%3BMikouchi%2C+Takashi%3BHagiya%2C+Kenji%3BOhsumi%2C+Kazumasa%3BCahill%2C+Thomas+A%3BLawton%2C+Jonathan+A%3BBarnes%2C+David%3BSteele%2C+Andrew%3BRochette%2C+Pierre%3BVerosub%2C+Kenneth+L%3BGattacceca%2C+Jerome%3BCooper%2C+George%3BGlavin%2C+Daniel+P%3BBurton%2C+Aaron+S%3BDworkin%2C+Jason+P%3BElsila%2C+Jamie+E%3BPizzarello%2C+Sandra%3BOgliore%2C+Ryan%3BSchmitt-Kopplin%2C+Philippe%3BHarir%2C+Mourad%3BHertkorn%2C+Norbert%3BVerchovsky%2C+Alexander%3BGrady%2C+Monica%3BNagao%2C+Keisuke%3BOkazaki%2C+Ryuji%3BTakechi%2C+Hiroyuki%3BHiroi%2C+Takahiro%3BSmith%2C+Ken%3BSilber%2C+Elizabeth+A%3BBrown%2C+Peter+G%3BAlbers%2C+Jim%3BKlotz%2C+Doug%3BHankey%2C+Mike%3BMatson%2C+Robert%3BFries%2C+Jeffrey+A%3BWalker%2C+Richard+J%3BPuchtel%2C+Igor%3BLee%2C+Cin-Ty+A%3BErdman%2C+Monica+E%3BEppich%2C+Gary+R%3BRoeske%2C+Sarah%3BGabelica%2C+Zelimir%3BLerche%2C+Michael%3BNuevo%2C+Michel%3BGirten%2C+Beverly%3BWorden%2C+Simon+P&rft.aulast=Jenniskens&rft.aufirst=Peter&rft.date=2012-12-21&rft.volume=338&rft.issue=6114&rft.spage=1583&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1227163 L2 - http://www.sciencemag.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 48 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch map N1 - SuppNotes - Related article by Underwood, E., on p. 1521 N1 - Last updated - 2013-04-19 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - asteroids; bolides; breccia; California; carbonaceous chondrites; chondrites; classification; CM chondrites; geochemistry; imagery; meteorites; meteors; mineral composition; Nevada; orbits; parent bodies; radar methods; regolith; Sierra Nevada; stony meteorites; Sutter's Mill Meteorite; United States DO - http://dx.doi.org/10.1126/science.1227163 ER - TY - JOUR T1 - HER2-Associated Radioresistance of Breast Cancer Stem Cells Isolated from HER2-Negative Breast Cancer Cells AN - 1668252186; 20318798 AB - Purpose: To understand the role of HER2-associated signaling network in breast cancer stem cells (BCSC) using radioresistant breast cancer cells and clinical recurrent breast cancers to evaluate HER2-targeted therapy as a tumor eliminating strategy for recurrent HER2-/low breast cancers.Experimental Design: HER2-expressing BCSCs (HER2+/CD44+/CD24-/low) were isolated from radiation-treated breast cancer MCF7 cells and in vivo irradiated MCF7 xenograft tumors. Tumor aggressiveness and radioresistance were analyzed by gap filling, Matrigel invasion, tumor-sphere formation, and clonogenic survival assays. The HER2/CD44 feature was analyzed in 40 primary and recurrent breast cancer specimens. Protein expression profiling in HER2+/CD44+/CD24-/low versus HER2-/CD44+/CD24-/low BCSCs was conducted with two-dimensional difference gel electrophoresis (2-D DIGE) and high-performance liquid chromatography tandem mass spectrometry (HPLC/MS-MS) analysis and HER2-mediated signaling network was generated by MetaCore program.Results: Compared with HER2-negative BCSCs, HER2+/CD44+/CD24-/low cells showed elevated aldehyde dehydrogenase (ALDH) activity and aggressiveness tested by Matrigel invasion, tumor sphere formation, and in vivo tumorigenesis. The enhanced aggressive phenotype and radioresistance of the HER2+/CD44+/CD24-/low cells were markedly reduced by inhibition of HER2 via siRNA or Herceptin treatments. Clinical breast cancer specimens revealed that cells coexpressing HER2 and CD44 were more frequently detected in recurrent (84.6%) than primary tumors (57.1%). In addition, 2-D DIGE and HPLC/MS-MS of HER2+/CD44+/CD24-/low versus HER2-/CD44+/CD24-/low BCSCs reported a unique HER2-associated protein profile including effectors involved in tumor metastasis, apoptosis, mitochondrial function, and DNA repair. A specific feature of HER2-STAT3 network was identified.Conclusion: This study provides the evidence that HER2-mediated prosurvival signaling network is responsible for the aggressive phenotype of BCSCs that could be targeted to control the therapy-resistant HER2-/low breast cancer. Clin Cancer Res; 18(24); 6634-47. [copy2012 AACR. JF - Clinical Cancer Research AU - Duru, Nadire AU - Fan, Ming AU - Candas, Demet AU - Menaa, Cheikh AU - Liu, Hsin-Chen AU - Nantajit, Danupon AU - Wen, Yunfei AU - Xiao, Kai AU - Eldridge, Angela AU - Chromy, Brett A AU - Li, Shiyong AU - Spitz, Douglas R AU - Lam, Kit S AU - Wicha, Max S AU - Li, Jian Jian AD - Departments of Radiation Oncology, Biochemistry and Molecular Medicine, and Pathology and Laboratory Medicine, University of California Davis School of Medicine; NCI-Designated Comprehensive Cancer Center, University of California Davis, Sacramento; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California; Department of Gynecologic Oncology, MD Anderson Cancer Center, University of Texas, Houston, Texas; Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia; Free Radical and Radiation Biology Program, Department of Radiation Oncology, Holden Comprehensive Cancer Center, The University of Iowa, Iowa City, Iowa; and University of Michigan Comprehensive Cancer Center, Ann Arbor, Michigan Y1 - 2012/12/15/ PY - 2012 DA - 2012 Dec 15 SP - 6634 EP - 6647 PB - American Association for Cancer Research, 615 Chestnut St., 17th Floor Philadelphia PA 19106-4404 United States VL - 18 IS - 24 SN - 1078-0432, 1078-0432 KW - Biotechnology and Bioengineering Abstracts KW - High-performance liquid chromatography KW - ErbB-2 protein KW - Apoptosis KW - CD44 antigen KW - Tumorigenesis KW - Mitochondria KW - DNA repair KW - Gel electrophoresis KW - Mass spectroscopy KW - Metastases KW - Stem cells KW - siRNA KW - Breast cancer KW - Xenografts KW - Radioresistance KW - Aldehyde dehydrogenase KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668252186?accountid=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=Clinical+Cancer+Research&rft.atitle=HER2-Associated+Radioresistance+of+Breast+Cancer+Stem+Cells+Isolated+from+HER2-Negative+Breast+Cancer+Cells&rft.au=Duru%2C+Nadire%3BFan%2C+Ming%3BCandas%2C+Demet%3BMenaa%2C+Cheikh%3BLiu%2C+Hsin-Chen%3BNantajit%2C+Danupon%3BWen%2C+Yunfei%3BXiao%2C+Kai%3BEldridge%2C+Angela%3BChromy%2C+Brett+A%3BLi%2C+Shiyong%3BSpitz%2C+Douglas+R%3BLam%2C+Kit+S%3BWicha%2C+Max+S%3BLi%2C+Jian+Jian&rft.aulast=Duru&rft.aufirst=Nadire&rft.date=2012-12-15&rft.volume=18&rft.issue=24&rft.spage=6634&rft.isbn=&rft.btitle=&rft.title=Clinical+Cancer+Research&rft.issn=10780432&rft_id=info:doi/10.1158%2F1078-0432.CCR-12-1436 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - High-performance liquid chromatography; Apoptosis; ErbB-2 protein; CD44 antigen; Tumorigenesis; Mitochondria; DNA repair; Mass spectroscopy; Gel electrophoresis; Metastases; Stem cells; siRNA; Breast cancer; Radioresistance; Xenografts; Aldehyde dehydrogenase DO - http://dx.doi.org/10.1158/1078-0432.CCR-12-1436 ER - TY - JOUR T1 - Phase transformations and metallization of magnesium oxide at high pressure and temperature AN - 1282821727; 2013-014324 AB - Magnesium oxide (MgO) is representative of the rocky materials comprising the mantles of terrestrial planets, such that its properties at high temperatures and pressures reflect the nature of planetary interiors. Shock-compression experiments on MgO to pressures of 1.4 terapascals (TPa) reveal a sequence of two phase transformations: from B1 (sodium chloride) to B2 (cesium chloride) crystal structures above 0.36 TPa, and from electrically insulating solid to metallic liquid above 0.60 TPa. The transitions exhibit large latent heats that are likely to affect the structure and evolution of super-Earths. Together with data on other oxide liquids, we conclude that magmas deep inside terrestrial planets can be electrically conductive, enabling magnetic field-producing dynamo action within oxide-rich regions and blurring the distinction between planetary mantles and cores. JF - Science AU - McWilliams, R Stewart AU - Spaulding, Dylan K AU - Eggert, Jon H AU - Celliers, Peter M AU - Hicks, Damien G AU - Smith, Raymond F AU - Collins, Gilbert W AU - Jeanloz, Raymond Y1 - 2012/12/07/ PY - 2012 DA - 2012 Dec 07 SP - 1330 EP - 1333 PB - American Association for the Advancement of Science, Washington, DC VL - 338 IS - 6112 SN - 0036-8075, 0036-8075 KW - experimental studies KW - shock waves KW - pressure KW - dynamos KW - mantle KW - phase transitions KW - high pressure KW - magnetic field KW - temperature KW - terrestrial planets KW - planets KW - laboratory studies KW - magnesium oxides KW - oxides KW - core KW - high temperature KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282821727?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Phase+transformations+and+metallization+of+magnesium+oxide+at+high+pressure+and+temperature&rft.au=McWilliams%2C+R+Stewart%3BSpaulding%2C+Dylan+K%3BEggert%2C+Jon+H%3BCelliers%2C+Peter+M%3BHicks%2C+Damien+G%3BSmith%2C+Raymond+F%3BCollins%2C+Gilbert+W%3BJeanloz%2C+Raymond&rft.aulast=McWilliams&rft.aufirst=R&rft.date=2012-12-07&rft.volume=338&rft.issue=6112&rft.spage=1330&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1229450 L2 - http://www.sciencemag.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 37 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2013-02-05 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - core; dynamos; experimental studies; high pressure; high temperature; laboratory studies; magnesium oxides; magnetic field; mantle; oxides; phase transitions; planets; pressure; shock waves; temperature; terrestrial planets DO - http://dx.doi.org/10.1126/science.1229450 ER - TY - CPAPER T1 - Multi-scale Analysis with Python T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313122068; 6179056 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Marvel, Katherine Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Python UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313122068?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Multi-scale+Analysis+with+Python&rft.au=Marvel%2C+Katherine&rft.aulast=Marvel&rft.aufirst=Katherine&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Evaluating Arctic Lower Tropospheric Stability in CAM4 and CAM5 T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313119823; 6184053 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Barton, Neil AU - Klein, Stephen AU - Boyle, James Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Arctic KW - Polar environments KW - Troposphere UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313119823?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Evaluating+Arctic+Lower+Tropospheric+Stability+in+CAM4+and+CAM5&rft.au=Barton%2C+Neil%3BKlein%2C+Stephen%3BBoyle%2C+James&rft.aulast=Barton&rft.aufirst=Neil&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Cement/caprock fracture healing experiments to assess the integrity of CO2 injection wells T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313118589; 6190162 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Du Frane, Wyatt AU - Mason, Harris AU - Walsh, Stuart AU - Ruddle, Dave AU - Carroll, Susan Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Injection wells KW - Carbon dioxide KW - Cement KW - Fractures KW - Bone healing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313118589?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Cement%2Fcaprock+fracture+healing+experiments+to+assess+the+integrity+of+CO2+injection+wells&rft.au=Du+Frane%2C+Wyatt%3BMason%2C+Harris%3BWalsh%2C+Stuart%3BRuddle%2C+Dave%3BCarroll%2C+Susan&rft.aulast=Du+Frane&rft.aufirst=Wyatt&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - The Source Physics Experiments and Advances in Seismic Explosion Monitoring Predictive Capabilities T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313116439; 6182643 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Walter, William AU - Ford, Sean AU - Antoun, Tarabay AU - Pitarka, Arben AU - Xu, Heming AU - Vorobiev, Oleg AU - Rodgers, Arthur AU - Pyle, Moira Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Explosions KW - Prediction UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313116439?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=The+Source+Physics+Experiments+and+Advances+in+Seismic+Explosion+Monitoring+Predictive+Capabilities&rft.au=Walter%2C+William%3BFord%2C+Sean%3BAntoun%2C+Tarabay%3BPitarka%2C+Arben%3BXu%2C+Heming%3BVorobiev%2C+Oleg%3BRodgers%2C+Arthur%3BPyle%2C+Moira&rft.aulast=Walter&rft.aufirst=William&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Modeling Mechanically-Induced Permeability Changes in Subsurface Reservoirs T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313115847; 6182434 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - White, Joshua Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Permeability KW - Reservoirs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313115847?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Modeling+Mechanically-Induced+Permeability+Changes+in+Subsurface+Reservoirs&rft.au=White%2C+Joshua&rft.aulast=White&rft.aufirst=Joshua&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Materials Properties at TeraPascal Pressures: Laboratory Experiments on Terrestrial Exo-Planetary Interiors T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313111217; 6184644 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Eggert, Jon Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Laboratory testing KW - Pressure UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313111217?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Materials+Properties+at+TeraPascal+Pressures%3A+Laboratory+Experiments+on+Terrestrial+Exo-Planetary+Interiors&rft.au=Eggert%2C+Jon&rft.aulast=Eggert&rft.aufirst=Jon&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Evaluation of Ages in the Lunar Highlands with Implications for the Evolution of the Moon T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313110173; 6182359 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Borg, Lars AU - Gaffney, Amy AU - Carlson, Richard Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Age KW - Moon KW - Evolution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313110173?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Evaluation+of+Ages+in+the+Lunar+Highlands+with+Implications+for+the+Evolution+of+the+Moon&rft.au=Borg%2C+Lars%3BGaffney%2C+Amy%3BCarlson%2C+Richard&rft.aulast=Borg&rft.aufirst=Lars&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - The Asian Summer Monsoon: An Intercomparison of CMIP5 vs. CMIP3 Simulations of the Late 20th Century T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313108987; 6185067 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Sperber, Kenneth AU - Annamalai, H AU - Kang, In-sik AU - Kitoh, Akio AU - Moise, Aurel AU - Turner, Andrew AU - Wang, Bin AU - Zhou, Tianjun Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Summer KW - Simulation KW - Monsoons UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313108987?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=The+Asian+Summer+Monsoon%3A+An+Intercomparison+of+CMIP5+vs.+CMIP3+Simulations+of+the+Late+20th+Century&rft.au=Sperber%2C+Kenneth%3BAnnamalai%2C+H%3BKang%2C+In-sik%3BKitoh%2C+Akio%3BMoise%2C+Aurel%3BTurner%2C+Andrew%3BWang%2C+Bin%3BZhou%2C+Tianjun&rft.aulast=Sperber&rft.aufirst=Kenneth&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Putting the Fizz in the Fissure: Geochemical and Geomechanical Effects of Carbonated Brine in a Natural Fracture T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313108976; 6190541 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Smith, Megan AU - Walsh, Stuart AU - Carroll, Susan Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Geochemistry KW - Salinity effects KW - Brines KW - Fractures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313108976?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Putting+the+Fizz+in+the+Fissure%3A+Geochemical+and+Geomechanical+Effects+of+Carbonated+Brine+in+a+Natural+Fracture&rft.au=Smith%2C+Megan%3BWalsh%2C+Stuart%3BCarroll%2C+Susan&rft.aulast=Smith&rft.aufirst=Megan&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Uncertainty Quantification of CO2 Leakage through a Fault with Multiphase and Geo-mechanic Effects T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313108417; 6180528 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Lu, Chuanhe AU - White, Joshua AU - Hao, Yue AU - Sun, Yunwei AU - Chiaramonte, Laura AU - Carroll, Susan Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Leakage KW - Carbon dioxide UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313108417?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Uncertainty+Quantification+of+CO2+Leakage+through+a+Fault+with+Multiphase+and+Geo-mechanic+Effects&rft.au=Lu%2C+Chuanhe%3BWhite%2C+Joshua%3BHao%2C+Yue%3BSun%2C+Yunwei%3BChiaramonte%2C+Laura%3BCarroll%2C+Susan&rft.aulast=Lu&rft.aufirst=Chuanhe&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Probabilistic Risk Assessment Framework for co2 Leakages through Porous Fractured Caprock T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313106713; 6194265 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Lomov, Ilya AU - Ezzedine, Souheil AU - McNab, Walt AU - Ryerson, Frederick Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Risk assessment KW - Leakage KW - Carbon dioxide KW - Fractures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313106713?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Probabilistic+Risk+Assessment+Framework+for+co2+Leakages+through+Porous+Fractured+Caprock&rft.au=Lomov%2C+Ilya%3BEzzedine%2C+Souheil%3BMcNab%2C+Walt%3BRyerson%2C+Frederick&rft.aulast=Lomov&rft.aufirst=Ilya&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - HPC simulations of grain-scale spallation to improve thermal spallation drilling T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313106366; 6179033 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Walsh, Stuart AU - Lomov, Ilya AU - Wideman, Thomas AU - Potter, Jared Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Simulation KW - Drilling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313106366?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=HPC+simulations+of+grain-scale+spallation+to+improve+thermal+spallation+drilling&rft.au=Walsh%2C+Stuart%3BLomov%2C+Ilya%3BWideman%2C+Thomas%3BPotter%2C+Jared&rft.aulast=Walsh&rft.aufirst=Stuart&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Interpreting climate model ensembles: Progress and challenges T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313096936; 6193884 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Gleckler, Peter Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Climate KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313096936?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Interpreting+climate+model+ensembles%3A+Progress+and+challenges&rft.au=Gleckler%2C+Peter&rft.aulast=Gleckler&rft.aufirst=Peter&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Combined Use of Absolute and Differential Seismic Arrival Time Data to Improve Absolute Event Location T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313096666; 6182570 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Myers, Stephen AU - Johannesson, Gardar Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313096666?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Combined+Use+of+Absolute+and+Differential+Seismic+Arrival+Time+Data+to+Improve+Absolute+Event+Location&rft.au=Myers%2C+Stephen%3BJohannesson%2C+Gardar&rft.aulast=Myers&rft.aufirst=Stephen&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Sorption/Desorption Interactions of Plutonium with Montmorillonite T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313096646; 6189384 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Begg, James AU - Zavarin, Mavrik AU - Zhao, Pihong AU - Kersting, Annie Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Desorption KW - Plutonium KW - Sorption KW - Montmorillonite UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313096646?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Sorption%2FDesorption+Interactions+of+Plutonium+with+Montmorillonite&rft.au=Begg%2C+James%3BZavarin%2C+Mavrik%3BZhao%2C+Pihong%3BKersting%2C+Annie&rft.aulast=Begg&rft.aufirst=James&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Manganese Cycling in a Long-term Plant Litter Decomposition Time Series T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313090387; 6184904 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Keiluweit, Marco AU - Nico, Peter AU - Kleber, Markus AU - Bougoure, Jeremy AU - Harmon, Mark AU - Pett-Ridge, Jennifer Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Time series analysis KW - Litter KW - Manganese KW - Decomposition KW - Degradation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313090387?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Manganese+Cycling+in+a+Long-term+Plant+Litter+Decomposition+Time+Series&rft.au=Keiluweit%2C+Marco%3BNico%2C+Peter%3BKleber%2C+Markus%3BBougoure%2C+Jeremy%3BHarmon%2C+Mark%3BPett-Ridge%2C+Jennifer&rft.aulast=Keiluweit&rft.aufirst=Marco&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Enhancing the Sustainability of Egs Using Colloidal Silica Gel T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313089063; 6188668 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Bourcier, William AU - Ezzedine, Souheil AU - Hunt, Jonathan AU - Roberts, Sarah AU - Roberts, Jeffery Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Sustainability KW - Resource management KW - silica gel UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313089063?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Enhancing+the+Sustainability+of+Egs+Using+Colloidal+Silica+Gel&rft.au=Bourcier%2C+William%3BEzzedine%2C+Souheil%3BHunt%2C+Jonathan%3BRoberts%2C+Sarah%3BRoberts%2C+Jeffery&rft.aulast=Bourcier&rft.aufirst=William&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Progress in Simulating Intraseasonal Variability in Climate Models T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313088091; 6189897 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Sperber, Kenneth AU - Annamalai, H AU - Kim, Daehyun AU - Hung, Meng-Pai Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Climatic changes KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313088091?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Progress+in+Simulating+Intraseasonal+Variability+in+Climate+Models&rft.au=Sperber%2C+Kenneth%3BAnnamalai%2C+H%3BKim%2C+Daehyun%3BHung%2C+Meng-Pai&rft.aulast=Sperber&rft.aufirst=Kenneth&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - LLNL-G3Dv3: Global P-wave tomography model for improved regional and teleseismic travel time prediction T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313086965; 6179827 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Simmons, Nathan AU - Myers, Stephen AU - Johannesson, Gardar AU - Matzel, Eric Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Prediction KW - P-waves KW - Tomography KW - Travel KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313086965?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=LLNL-G3Dv3%3A+Global+P-wave+tomography+model+for+improved+regional+and+teleseismic+travel+time+prediction&rft.au=Simmons%2C+Nathan%3BMyers%2C+Stephen%3BJohannesson%2C+Gardar%3BMatzel%2C+Eric&rft.aulast=Simmons&rft.aufirst=Nathan&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Integrated, Geothermal-CO2 Storage: An Adaptable, Hybrid, Multi-Stage, Energy-Recovery Approach to Reduce Carbon Intensity and Environmental Risk T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313082313; 6188672 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Buscheck, Thomas AU - Chen, Mingjie AU - Lu, Chuanhe AU - Sun, Yunwei AU - Hao, Yue AU - Elliot, Thomas AU - Celia, Michael AU - Bielicki, Jeffrey Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Hybrids KW - Storage KW - Carbon UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313082313?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Integrated%2C+Geothermal-CO2+Storage%3A+An+Adaptable%2C+Hybrid%2C+Multi-Stage%2C+Energy-Recovery+Approach+to+Reduce+Carbon+Intensity+and+Environmental+Risk&rft.au=Buscheck%2C+Thomas%3BChen%2C+Mingjie%3BLu%2C+Chuanhe%3BSun%2C+Yunwei%3BHao%2C+Yue%3BElliot%2C+Thomas%3BCelia%2C+Michael%3BBielicki%2C+Jeffrey&rft.aulast=Buscheck&rft.aufirst=Thomas&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Coda Magnitudes of Small Events in Iran and Surrounding Regions T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313080093; 6193516 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Gok, Rengin AU - Alexanian, Ara AU - Kaviani, Ayoub AU - Sandvol, Eric AU - Pasyanos, Michael AU - Matzel, Eric AU - Walter, William Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Iran UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313080093?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Coda+Magnitudes+of+Small+Events+in+Iran+and+Surrounding+Regions&rft.au=Gok%2C+Rengin%3BAlexanian%2C+Ara%3BKaviani%2C+Ayoub%3BSandvol%2C+Eric%3BPasyanos%2C+Michael%3BMatzel%2C+Eric%3BWalter%2C+William&rft.aulast=Gok&rft.aufirst=Rengin&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Improving Consistency between Cloud Parameterizations in CAM5 T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313077968; 6193452 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Caldwell, Peter AU - Park, Sungsu AU - Klein, Stephen AU - Rasch, Philip AU - Morrison, Hugh AU - Bergmann, Daniel Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Clouds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313077968?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Improving+Consistency+between+Cloud+Parameterizations+in+CAM5&rft.au=Caldwell%2C+Peter%3BPark%2C+Sungsu%3BKlein%2C+Stephen%3BRasch%2C+Philip%3BMorrison%2C+Hugh%3BBergmann%2C+Daniel&rft.aulast=Caldwell&rft.aufirst=Peter&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Reducing Seismic Hazard and Building Capacity through International Cooperation T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313076890; 6192856 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Vergino, Eileen AU - Arakelyan, Avetis AU - Babayan, Hektor AU - Durgaryan, Raffi AU - Elashvili, Misha AU - Godoladze, Tea AU - Javakhishvili, Zurab AU - Kalogeras, Ioannis AU - Karakhanyan, Arkadi AU - Martin, Randolph AU - Yetirmishli, Gurban Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Seismic activity KW - International cooperation KW - Hazards UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313076890?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Reducing+Seismic+Hazard+and+Building+Capacity+through+International+Cooperation&rft.au=Vergino%2C+Eileen%3BArakelyan%2C+Avetis%3BBabayan%2C+Hektor%3BDurgaryan%2C+Raffi%3BElashvili%2C+Misha%3BGodoladze%2C+Tea%3BJavakhishvili%2C+Zurab%3BKalogeras%2C+Ioannis%3BKarakhanyan%2C+Arkadi%3BMartin%2C+Randolph%3BYetirmishli%2C+Gurban&rft.aulast=Vergino&rft.aufirst=Eileen&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Simulated mean state, variability and change: large-scale circulation in CMIP5 T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313066643; 6183664 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Gleckler, Peter AU - Durack, Paul Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313066643?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Simulated+mean+state%2C+variability+and+change%3A+large-scale+circulation+in+CMIP5&rft.au=Gleckler%2C+Peter%3BDurack%2C+Paul&rft.aulast=Gleckler&rft.aufirst=Peter&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - ESGF: Wrangling Big Science Data with an Elastic Federation T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313064473; 6191587 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Bell, Gavin AU - Cinquini, Luca AU - Harney, John AU - Doutriaux, Charles AU - Williams, Dean Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313064473?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=ESGF%3A+Wrangling+Big+Science+Data+with+an+Elastic+Federation&rft.au=Bell%2C+Gavin%3BCinquini%2C+Luca%3BHarney%2C+John%3BDoutriaux%2C+Charles%3BWilliams%2C+Dean&rft.aulast=Bell&rft.aufirst=Gavin&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Aerosol First Indirect Effects on Non-Precipitating Low-Level Liquid Cloud Properties as Simulated by CAM5 at ARM Sites T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313063457; 6182787 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Zhao, Chuanfeng AU - Klein, Stephen AU - Xie, Shaocheng AU - Liu, Xiaohong AU - Boyle, James AU - Zhang, Yuying Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Aerosols KW - Clouds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313063457?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Aerosol+First+Indirect+Effects+on+Non-Precipitating+Low-Level+Liquid+Cloud+Properties+as+Simulated+by+CAM5+at+ARM+Sites&rft.au=Zhao%2C+Chuanfeng%3BKlein%2C+Stephen%3BXie%2C+Shaocheng%3BLiu%2C+Xiaohong%3BBoyle%2C+James%3BZhang%2C+Yuying&rft.aulast=Zhao&rft.aufirst=Chuanfeng&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - New Insights into Stability of Plutonium Intrinsic Colloids in the Presence of Clay at Elevated Temperatures: Experimental and Modeling Approaches T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313055753; 6179746 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Zhao, Pihong AU - Sun, Yunwei AU - Zavarin, Mavrik AU - Dai, Zurong AU - Carroll, Susan AU - Kersting, Annie Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Clays KW - Temperature effects KW - Colloids KW - Plutonium UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313055753?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=New+Insights+into+Stability+of+Plutonium+Intrinsic+Colloids+in+the+Presence+of+Clay+at+Elevated+Temperatures%3A+Experimental+and+Modeling+Approaches&rft.au=Zhao%2C+Pihong%3BSun%2C+Yunwei%3BZavarin%2C+Mavrik%3BDai%2C+Zurong%3BCarroll%2C+Susan%3BKersting%2C+Annie&rft.aulast=Zhao&rft.aufirst=Pihong&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - UV-CDAT Re-sharable Analyses and Diagnostics (U-ReAD): a framework to create and share UV-CDAT plugins T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313055266; 6179668 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Doutriaux, Charles AU - Chaudhary, Aashish AU - Krishnan, Harinarayan AU - Marvel, Katherine AU - Maxwell, Thomas AU - Painter, Jeffrey AU - Potter, Gerald AU - Williams, Dean Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - U.V. radiation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313055266?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=UV-CDAT+Re-sharable+Analyses+and+Diagnostics+%28U-ReAD%29%3A+a+framework+to+create+and+share+UV-CDAT+plugins&rft.au=Doutriaux%2C+Charles%3BChaudhary%2C+Aashish%3BKrishnan%2C+Harinarayan%3BMarvel%2C+Katherine%3BMaxwell%2C+Thomas%3BPainter%2C+Jeffrey%3BPotter%2C+Gerald%3BWilliams%2C+Dean&rft.aulast=Doutriaux&rft.aufirst=Charles&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - How old is the carbon that forests respire? Seasonal patterns in soil and ecosystem 14CO2 from a hardwood forest in Northern Wisconsin T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313054988; 6189151 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Phillips, Claire AU - McFarlane, Karis AU - Desai, Ankur Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - USA, Wisconsin KW - Forests KW - Seasonal variations KW - Soil KW - Hardwoods KW - Sulfur dioxide KW - Carbon UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313054988?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=How+old+is+the+carbon+that+forests+respire%3F+Seasonal+patterns+in+soil+and+ecosystem+14CO2+from+a+hardwood+forest+in+Northern+Wisconsin&rft.au=Phillips%2C+Claire%3BMcFarlane%2C+Karis%3BDesai%2C+Ankur&rft.aulast=Phillips&rft.aufirst=Claire&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Time Scale Invariance of Cloud Optical Depth Feedbacks in Models T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313054788; 6181672 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Gordon, Neil AU - Klein, Stephen Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Optical analysis KW - Clouds KW - Feedback KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313054788?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Time+Scale+Invariance+of+Cloud+Optical+Depth+Feedbacks+in+Models&rft.au=Gordon%2C+Neil%3BKlein%2C+Stephen&rft.aulast=Gordon&rft.aufirst=Neil&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - LITHO1.0 - An Updated Crust and Lithospheric Model of the Earth Developed Using Multiple Data Constraints T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313054481; 6188951 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Pasyanos, Michael AU - Masters, Guy AU - Laske, Gabi AU - Ma, Zhitu Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Data processing KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313054481?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=LITHO1.0+-+An+Updated+Crust+and+Lithospheric+Model+of+the+Earth+Developed+Using+Multiple+Data+Constraints&rft.au=Pasyanos%2C+Michael%3BMasters%2C+Guy%3BLaske%2C+Gabi%3BMa%2C+Zhitu&rft.aulast=Pasyanos&rft.aufirst=Michael&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Are climate model simulations of clouds improving? An evaluation using the ISCCP simulator T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313053603; 6188968 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Klein, Stephen AU - Zhang, Yuying AU - Zelinka, Mark AU - Pincus, Robert AU - Boyle, James AU - Gleckler, Peter Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Simulation KW - Clouds KW - Climatic changes KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313053603?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Are+climate+model+simulations+of+clouds+improving%3F+An+evaluation+using+the+ISCCP+simulator&rft.au=Klein%2C+Stephen%3BZhang%2C+Yuying%3BZelinka%2C+Mark%3BPincus%2C+Robert%3BBoyle%2C+James%3BGleckler%2C+Peter&rft.aulast=Klein&rft.aufirst=Stephen&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Identifying human influences on atmospheric temperature: Are results robust to uncertainties? T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313034625; 6190202 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Santer, Benjamin Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Atmospheric temperature KW - Temperature effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313034625?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Identifying+human+influences+on+atmospheric+temperature%3A+Are+results+robust+to+uncertainties%3F&rft.au=Santer%2C+Benjamin&rft.aulast=Santer&rft.aufirst=Benjamin&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Regional Assessment of the Parameter-Dependent Performance of CAM4 in Simulating Tropical Clouds T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313034334; 6188983 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Zhang, Yuying AU - Xie, Shaocheng AU - Covey, Curtis AU - Lucas, Donald AU - Gleckler, Peter AU - Klein, Stephen AU - Tannahill, John AU - Doutriaux, Charles AU - Klein, Richard Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Clouds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313034334?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Regional+Assessment+of+the+Parameter-Dependent+Performance+of+CAM4+in+Simulating+Tropical+Clouds&rft.au=Zhang%2C+Yuying%3BXie%2C+Shaocheng%3BCovey%2C+Curtis%3BLucas%2C+Donald%3BGleckler%2C+Peter%3BKlein%2C+Stephen%3BTannahill%2C+John%3BDoutriaux%2C+Charles%3BKlein%2C+Richard&rft.aulast=Zhang&rft.aufirst=Yuying&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Perturbed-parameter hindcasts of the MJO with CAM5 T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313027369; 6189009 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Klein, Stephen AU - Boyle, James AU - Tannahill, John AU - Lucas, Donald AU - Neale, Richard AU - Xie, Shaocheng AU - Sperber, Kenneth Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313027369?accountid=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=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Perturbed-parameter+hindcasts+of+the+MJO+with+CAM5&rft.au=Klein%2C+Stephen%3BBoyle%2C+James%3BTannahill%2C+John%3BLucas%2C+Donald%3BNeale%2C+Richard%3BXie%2C+Shaocheng%3BSperber%2C+Kenneth&rft.aulast=Klein&rft.aufirst=Stephen&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Earth's building blocks; the "core spyglass" AN - 1668229968; 2015-027263 AB - The details of Earth's accretion, and the nature of Earth's building blocks in particular, are still poorly understood. One way to constrain accretionary processes is to understand the major differentiation event that took place during accretion: core formation. Earth's core formed during accretion as a result of melting, phase-separation, and segregation of accretionary building blocks (meteorites, planetesimals, protoplanets). Extensive melting lead to the formation of a Magma Ocean, and the bulk compositions of the core and mantle depend on it evolution (pressure, temperature, composition) during accretion. The entire process left a compositional imprint on both reservoirs: in the silicate Earth, in terms of siderophile trace-element concentrations (a record that is observed in present-day mantle rocks); and on the core, in terms of major element composition and light elements dissolved in the metal (a record that is observed by seismology through the core density-deficit). Constraining accretionary processes by looking at the core has been studied for almost ten years. Based on partitioning of slightly siderophile elements, the current paradigm is that Earth must have formed under very reducing conditions, followed by a complex oxidation mechanism to reach the present-day redox state. In the light of new partitioning data under extreme conditions, we will show here that Earth can form at a constant redox state (the present-day value), or even form in relatively oxidized conditions (that of carbonaceous or ordinary chondrites). This paradigm shift is strengthened by the fact that oxidizing conditions favour oxygen solubility in the core, which is a requirement both for the inner-core density jump and outer core density deficit. JF - American Geophysical Union Fall Meeting AU - Badro, J AU - Brodholt, J P AU - Siebert, J AU - Ryerson, F J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract P44A EP - 08 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229968?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Earth%27s+building+blocks%3B+the+%22core+spyglass%22&rft.au=Badro%2C+J%3BBrodholt%2C+J+P%3BSiebert%2C+J%3BRyerson%2C+F+J%3BAnonymous&rft.aulast=Badro&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&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 2012 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 - 2015-04-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Importance of including topography in numerical simulations of Venus' atmospheric circulation AN - 1656038893; 2015-014358 AB - Venus' atmosphere is characterized by strong superrotation, in which the wind velocities at cloud heights are around 60 times faster than the surface rotation rate. The reasons for this strong superrotation are still not well understood. Since the surface of the planet is both a source and sink of atmospheric angular momentum it is important to understand and properly account for the interactions at the surface-atmosphere boundary. A key aspect of the surface-atmosphere interaction is the topography. Topography has been introduced into different general circulation models (GCMs) of Venus' atmosphere, producing significant, but widely varying effects on the atmospheric circulation. The reasons for the inconsistencies among model results are not well known, but our studies suggest they might be related to the influences of different dynamical cores. In our recent study, we have analyzed the angular momentum budget for two Venus GCMs, the Venus Community Atmosphere model (Venus CAM) and the Laboratoire de Meteorologie Dynamique (LMD) Venus GCM. Because of Venus' low magnitude surface winds, surface friction alone supplies only a relatively weak angular momentum forcing to the atmosphere. We find that if surface friction is introduced without including surface topography, the angular momentum balance of the atmosphere may be dominated by effects such as numerical diffusion, a sponge layer, or other numerical residuals that are generally included in all GCMs, and can themselves be sources of angular momentum. However, we find the mountain torque associated with realistic Venus surface topography supplies a much larger source of angular momentum than the surface friction, and dominates nonphysical numerical terms. (A similar effect occurs for rapidly rotating planets like Earth, but in this case numerical errors in the angular momentum budget are relatively small even in the absence of mountain torque). Even if surface friction dominates numerical terms in the angular momentum budgets of simulations without realistic topography, it must be remembered that there are no observational constraints on model parameterizations of the real surface friction on Venus. It is essential for a planet such as Venus, for which surface friction alone supplies only weak angular momentum forcing, to include surface topography to generate realistic forcing of angular momentum and avoid the influences of numerical artifacts, which can be significant. Venus' topography, as mapped using measurements from the Magellan mission, shows significant hemispheric asymmetry. In this work we examine the impact of this asymmetry using simulations of Venus' circulation with and without topography, within the latest version of the Venus CAM GCM. JF - American Geophysical Union Fall Meeting AU - Parish, H F AU - Schubert, G AU - Lebonnois, S AU - Covey, C C AU - Walterscheid, R L AU - Grossman, A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract P11D EP - 1845 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656038893?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Importance+of+including+topography+in+numerical+simulations+of+Venus%27+atmospheric+circulation&rft.au=Parish%2C+H+F%3BSchubert%2C+G%3BLebonnois%2C+S%3BCovey%2C+C+C%3BWalterscheid%2C+R+L%3BGrossman%2C+A%3BAnonymous&rft.aulast=Parish&rft.aufirst=H&rft.date=2012-12-01&rft.volume=2012&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 2012 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 - 2015-02-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Transmission electron microscope studies of Martian "iddingsite" in the Nakhlite meteorite MIL 090032 AN - 1656038181; 2015-014383 AB - As with the other nakhlites, MIL 090032 contains iddingsite-like alteration veins in the olivine phenocrysts that reportedly originated on Mars [1]. These "iddingsite" veins have been analysed in a number of the nakhlite meteorites [2], and the presence of hydrous silicate gel, smectite clays, siderite, Fe-oxides, gypsum and carbonate have been reported. The presence and proportion of these phases in the different nakhlites appears to relate to the composition and concentration of the martian brine that flowed through each, thus supporting the theory that the nakhlite secondary alteration phases were produced by an evaporation sequence on the surface of Mars [3]. We analyzed these Martian "iddingsite" veins in MIL 090032 with the aim of placing it and its three paired meteorites within the nakhlite alteration sequence. By expanding our knowledge of this alteration sequence, we will gain extra insight into the conditions on the Martian surface at the time these "iddingsite" veins formed (<1.3 Ga). We utilized the 80-300 kV aberration-corrected FEI Titan (Scanning) Transmission Electron Microscope (S-TEM) system at Lawrence Livermore National Laboratory to analyze a approximately 15X8mu m Focused Ion Beam (FIB) section of an "iddingsite" vein in MIL 090032. To allow the electrons to be transmitted through the FIB section, it was milled down to approximately 150 nm thickness. Our initial TEM data indicate this FIB section contains hydrous amorphous silicate gel towards the center, with areas of phyllosilicate (possibly nontronite) interspersed within this central zone. Towards the outer edge of the vein jarosite and then gypsum sulfates were present. At the very edge only partially broken down olivine was observed. The presence of phyllosilicate and silicate gel in this vein suggests the "iddingsite" in MIL 090032 was produced by water-rich brine, and the abundance of sulfates suggests the brine was enriched in sulfur. This assemblage of minerals is most in line with that of the "iddingsite" veins in the meteorite Lafayette, which is thought to have been exposed to the most aqueous brine in the nakhlite alteration sequence [2,3]. MIL 090032 is a meteorite find, and contains areas of terrestrially derived sulfate-rich alteration which appear to have similar compositions to the Martian "iddingsite" veins (although texturally the two are easily distinguishable). Therefore, in addition to our analysis of the above "iddignsite" FIB section, we aim to analyze a similar FIB section of this terrestrial sulfate-rich alteration and compare the two. This comparison could not only determine if terrestrial weathering has affected the mineralogy and petrology of the pre-terrestrial alteration, but also whether the conditions on the Martian surface were similar to those in the Antarctic valleys at the time the "iddingsite" veins formed. [1] Gooding et al. (1991) Meteoritics 26, 135-143. [2] Changela and Bridges (2011) MAPS 45, 1847-1867. [3] Bridges et al. (2001) Space Sci. Rev. 96, 365-392. JF - American Geophysical Union Fall Meeting AU - Hallis, L AU - Ishii, H AU - Bradley, J P AU - Taylor, J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract P11E EP - 1875 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656038181?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Transmission+electron+microscope+studies+of+Martian+%22iddingsite%22+in+the+Nakhlite+meteorite+MIL+090032&rft.au=Hallis%2C+L%3BIshii%2C+H%3BBradley%2C+J+P%3BTaylor%2C+J%3BAnonymous&rft.aulast=Hallis&rft.aufirst=L&rft.date=2012-12-01&rft.volume=2012&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 2012 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 - 2015-02-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Electrical conductivity of lab-formed methane hydrate sand mixtures; technical developments and new results AN - 1656035944; 2015-012531 AB - Electromagnetic (EM) measurement techniques used in permafrost and marine wells show that electrical conductivity (sigma ) of gas-hydrate-bearing zones is typically lower than that of surrounding sediments. However, while sigma has been measured on analog materials, it has seldom been studied on methane hydrate, the most common gas hydrate in the shallow geosphere. Additional petrophysical information--such as mixing relations and/or compositions of individual components--is also needed to more accurately relate sigma to quantitative estimates of gas hydrate in EM-surveyed regions. To help address these needs, we first quantified the electrical properties of lab-formed methane hydrate at geologically relevant temperatures and pressures (Du Frane et al. GRL, 2011; also AGU 2011). A high-pressure cell was constructed to form hydrate from melting granular ice (made from distilled-deionized water) in the presence of pressurized CH (sub 4) gas, while measuring frequency-dependent impedance (Z) and sigma . Final samples were pure, polycrystalline methane hydrate with excess CH (sub 4) gas but no excess H (sub 2) O. The hydrate was then either quenched for grain-scale assessment by cryogenic SEM imaging, or dissociated in situ for further Z and sigma measurement. Du Frane et al. [GRL, 2011] reported sigma of methane hydrate to range from 10 (super -5) to 10 (super -4) S/m between -15 and 15 degrees C, with activation energy (E (sub a) ) of 30.6 kJ/mol. In comparison, sigma of the dissociated ice byproduct was approximately 400% higher with 50% higher E (sub a) . Measurements were then performed on methane hydrate mixed with known amounts of a standard quartz sand (Oklahoma #1, approximately 125 mu m grain size) or similarly-sized silica glass beads in proportions ranging 10 to 90 vol. % relative to the hydrate phase. Several samples were dissociated at temperatures below -3 degrees C for Z and sigma measurement of the resulting ice/sand mixtures, and all samples were imaged for phase distribution. Adding sand complicated Z spectra for frequencies 1MHz. However, the impedance at the frequency associated with the highest phase angle (typically 100 kHz) could be used to effectively isolate the electrical response of the sample from system contributions, enabling determination of sigma . Surprisingly, the addition of sand, a nominal insulator, served to increase the overall sigma of mixtures with sand fractions up through approximately 50 vol. % (i.e. those samples with well-connected methane hydrate), while E (sub a) significantly decreased relative to single-phase methane hydrate. The reduced E (sub a) suggests that a separate conduction mechanism operates when sand is present. One possible explanation is that ionic impurities from sand surfaces chemically diffuse into the hydrate grains, increasing their concentration of mobile charge-carrying defects. The fact that the addition of glass beads did not produce the same results supports this hypothesis. Geometrical mixing laws alone may therefore not sufficiently describe complicated mixing relationships between gas hydrate and sediment. Further tests are needed to resolve the competing effects, particularly if results are to be applied to systems that are not dominated by the presence of seawater. Work was performed under the auspices of U.S. DOE contracts DE-NT0005668 and DE-AC52-07NA27344, and DOE/USGS Interagency Agreement DE-NT0006147. JF - American Geophysical Union Fall Meeting AU - Stern, L A AU - Du Frane, W L AU - Weitemeyer, K AU - Constable, S AU - Roberts, J J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract OS43B EP - 1811 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656035944?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Electrical+conductivity+of+lab-formed+methane+hydrate+sand+mixtures%3B+technical+developments+and+new+results&rft.au=Stern%2C+L+A%3BDu+Frane%2C+W+L%3BWeitemeyer%2C+K%3BConstable%2C+S%3BRoberts%2C+J+J%3BAnonymous&rft.aulast=Stern&rft.aufirst=L&rft.date=2012-12-01&rft.volume=2012&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 2012 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 - 2015-02-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Structural and fully coupled joint inversion for CO (sub 2) migration monitoring AN - 1648907934; 2015-010385 AB - Monitoring, modeling, and understanding migration of injected carbon dioxide (CO (sub 2) ) in the subsurface is crucial when assessing the risks associated with long-term underground CO (sub 2) storage. A key component for improved monitoring is the integrated analysis of complementary hydrological and geophysical monitoring data. Whereas traditional hydrological measurements are useful for determining the properties immediately surrounding boreholes, geophysical cross-borehole measurements are sensitive to subsurface properties over larger regions, but can have lower spatial or temporal resolution and can be difficult to interpret quantitatively. In a first step, we combine crosswell geophysical data (electrical resistance and seismic tomography) in a structural cross-gradient joint inversion. The resulting improved property scatter plots help to reduce uncertainties in the petrophysical relationships linking seismic velocity, electrical resistivity and CO (sub 2) gas saturation. In a second step, the advantages of hydrological and geophysical data sets are combined in a fully coupled hydrogeophysical inversion, using the iTOUGH2 software package. We consider a pilot study conducted near Cranfield, Mississippi, by the Southeast Regional Carbon Sequestration Partnership (SECARB), where CO (sub 2) was injected into a 25-m-thick saline aquifer at approximately 3.2 km depth. The available hydrological data includes gas composition (CO (sub 2) , CH (sub 4) , and injected tracers) and the distribution of gas saturation with depth in two monitoring boreholes, and pressure in the injection borehole. The geophysical datasets includes electrical resistance tomography (ERT) measurements at many times and time lapse seismic surveys at two times. A synthetic example shows the clear benefits of including geophysical data in the fully coupled inversion. For the field example we are able to obtain estimates of reservoir properties that best honor all available data using the fully coupled hydrogeophysical inversion. While good results can be achieved using the hydrological data alone, including the geophysical data stabilizes the inversion and yields more reliable parameter estimates. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Berkeley National Laboratory under contract DE-AC02-05CH11231 and Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344 (LLNL-ABS-569152). JF - American Geophysical Union Fall Meeting AU - Doetsch, J AU - Kowalsky, M B AU - Doughty, C AU - Finsterle, S AU - Ajo Franklin, J B AU - Yang, X AU - Carrigan, C R AU - Daley, T M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract NS34A EP - 01 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648907934?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Structural+and+fully+coupled+joint+inversion+for+CO+%28sub+2%29+migration+monitoring&rft.au=Doetsch%2C+J%3BKowalsky%2C+M+B%3BDoughty%2C+C%3BFinsterle%2C+S%3BAjo+Franklin%2C+J+B%3BYang%2C+X%3BCarrigan%2C+C+R%3BDaley%2C+T+M%3BAnonymous&rft.aulast=Doetsch&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&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 2012 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 - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - A deglacial ventilation history of Northeast Pacific intermediate waters AN - 1645570048; 2015-005604 AB - The transfer of carbon from the deep ocean to the atmosphere may have driven the 80-90 ppm rise in atmospheric CO (sub 2) recorded in Antarctic ice cores during the last glacial-interglacial transition (25-10 ka). The prevailing hypothesis is that this oceanic carbon reservoir, thought to be located in the abyssal Southern and Pacific Oceans, ventilated through the Southern Ocean, and released its CO (sub 2) to shallower depths, and eventually to the atmosphere. While proxy data supports a deglacial increase in Southern Ocean ventilation, evidence for a sufficiently large glacial abyssal carbon reservoir or an intermediate-depth circulation pathway for newly ventilated Southern Ocean waters is sparse and/or complicated. There is also evidence for increased subarctic North Pacific ventilation during every deglaciation since the onset of Northern Hemisphere glaciation at 2.7 Ma. Thus, a bipolar increase in deglacial ocean ventilation could potentially account for the decline in atmospheric (super 14) C activity during the Mystery Interval (17.5-14.5 ka) and resolve the source of poorly ventilated intermediate waters on the NE Pacific margin. Here we evaluate the possibility that ventilation of abyssal waters in the subarctic North Pacific also contributed to atmospheric CO (sub 2) rise during the last deglaciation (18-11 ka). We reconstruct the deglacial ventilation history for the intermediate NE Pacific using paired (super 14) C measurements (n=14) of planktonic and benthic foraminifera from a high-resolution sediment core MD02-2496 (48 degrees 58N, 127 degrees 02W; 1243 m water depth), collected offshore of Vancouver Island, Canada. The site lies near the base of the present day oxygen minimum zone in the transitional zone between the North Pacific subtropical and subpolar gyres. We find a mean deglacial benthic-planktonic (B-P) age of 1,198+ or -122 years and a mean (super 14) C ventilation age of 2152+ or -572 years (n=14) This is not significantly different to that found at sites on Gorda Ridge (2710m depth) and off Baja California (705m depth) or to modern values. Although all NE Pacific sites exhibit a general decline in radiocarbon activity from 18 to 11 ka, the magnitude of the decline at 1243 m (Vancouver margin; 276ppm) is less than at 705 m (Baja; 343ppm) and more than at 2710 m (Gorda; 200ppm). During the Mystery Interval, Delta (super 14) C at 1243 m decreased by approximately 130ppm, but values are more similar to Gorda Ridge than to Baja. However, our record reveals an increase in Delta (super 14) C at the onset of the Bolling-Allerod ( approximately 14.7 ka), which is similar to that off Baja but not Gorda Ridge. Our results suggest that a relatively young water mass influenced intermediate depths of the NE Pacific at this time. This was replaced by an older (lower Delta (super 14) C) watermass during the Younger-Dryas. Our results provide further support for increased ventilation of the subarctic North Pacific at the onset of the Bolling-Allerod. JF - American Geophysical Union Fall Meeting AU - Shevenell, A AU - Wilson, K E AU - Guilderson, T P AU - Hendy, I L AU - Gray, W R AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract PP13B EP - 2100 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645570048?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+deglacial+ventilation+history+of+Northeast+Pacific+intermediate+waters&rft.au=Shevenell%2C+A%3BWilson%2C+K+E%3BGuilderson%2C+T+P%3BHendy%2C+I+L%3BGray%2C+W+R%3BAnonymous&rft.aulast=Shevenell&rft.aufirst=A&rft.date=2012-12-01&rft.volume=2012&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 2012 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 - 2015-01-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - The value of information; assessing the ability of electrical resistivity to detect CO (sub 2) leakage in a shallow aquifer AN - 1641013036; 2015-000768 AB - This study demonstrates a methodology for evaluating the value of electrical resistivity data to detect CO (sub 2) leakage in a shallow groundwater aquifer. This methodology adopts the value of information (VOI) metric from the field of decision analysis. We consider a stakeholder's decision of whether or not to remediate the aquifer, given that they are uncertain whether or not a CO (sub 2) leak has occurred from a deep storage source through a well-bore into the shallow aquifer and what the impact of that leak would be. Two themes of uncertainty are needed for VOI studies. The first is related to the uncertain state of the subsurface, which is directly related to the outcome of the decision. In our example, it is uncertain whether or not the shallow groundwater has been impacted by CO (sub 2) leakage. The impact may be determined by the existence of depressed pH or elevated TDS (total dissolved solids) plume. We utilize results from a previous work that investigated uncertainty quantification of spatial heterogeneity and leakage rates (Mansoor et al, 2011). Therefore, we have a comprehensive suite of 713 simulations that represent our uncertainty regarding the existence and extent of a CO (sub 2) plume. Given certain TDS and pH thresholds, the simulations are categorized into two groups: impacted (a plume exists) or not impacted (no plume) at time=50 years. The second theme is related to the information's accuracy to inform us about the existence of a plume (e.g. the state of the subsurface directly relevant to the decision). The uncertainty of the information is measured by the data likelihood and is used to determine the value of imperfect information. For this demonstration, we consider how electrical resistivity data can detect the existence of pH plumes (due to the dissolution of CO (sub 2) ) and TDS (due to the accompanying brine leakage). The pH and TDS output from the 713 simulations are used to determine the electrical resistivity at time = 0 and time=50 years. An empirical method is used to compare the time=0 and time=50 resistivities: the geometric log mean ratio (GLMR) of the 2 data sets is calculated (Daily et al, 2004). This requires only the forward response be calculated at the 2 different times. The GLMR is used as a sensitivity measure, representing how much the electrical resistivity would change given the conditions of the aquifer. The likelihood of electrical resistivity to detect the presence of a plume is estimated by comparing the GLMR and the category (plume or no plume) for all the 713 simulations. Electrical resistivity forward models were calculated for two acquisition configurations: surface electrodes only and surface-to-borehole. For the surface acquisition, a GLMR >0.05 exclusively identifies impacted simulations. Whereas GLMR <0.05 give a more ambiguous message: both simulations that are impacted and not have GMLR<0.05. The degree of this ambiguity changes with different definitions of the plume (i.e. pH and TDS thresholds). Surface-to-borehole forward models were performed for a borehole located 200m from the leaky well. Results show that surface-to-borehole resistivity data is more reliable at distinguishing between impacted and non-impacted simulations, and therefore the VOI is higher than for surface electrodes alone. Prepared by LLNL under Contract No. DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Trainor Guitton, W J AU - Yang, X AU - Mansoor, K AU - Ramirez, A L AU - Sun, Y AU - Carroll, S AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract GC51A EP - 1169 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641013036?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+value+of+information%3B+assessing+the+ability+of+electrical+resistivity+to+detect+CO+%28sub+2%29+leakage+in+a+shallow+aquifer&rft.au=Trainor+Guitton%2C+W+J%3BYang%2C+X%3BMansoor%2C+K%3BRamirez%2C+A+L%3BSun%2C+Y%3BCarroll%2C+S%3BAnonymous&rft.aulast=Trainor+Guitton&rft.aufirst=W&rft.date=2012-12-01&rft.volume=2012&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 2012 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 - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Materials properties at TeraPascal pressures; laboratory experiments on terrestrial exo-planetary interiors AN - 1641011131; 2015-002020 AB - Many of the observed terrestrial exo-planets have central pressures exceeding 1 TPa (10 Mbar). Laser-driven ramp-compression experiments offer unprecedented opportunities to push the limits of condensed-matter and materials physics into this regime. I will discuss several recent experiments concerning stress-density, crystal structure, and temperature measurements. JF - American Geophysical Union Fall Meeting AU - Eggert, J H AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR32A EP - 01 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011131?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Materials+properties+at+TeraPascal+pressures%3B+laboratory+experiments+on+terrestrial+exo-planetary+interiors&rft.au=Eggert%2C+J+H%3BAnonymous&rft.aulast=Eggert&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&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 2012 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 - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Gbar equation of state measurements in spherically convergent shock experiments AN - 1637542974; 2014-104232 AB - The National Ignition Facility will allow us to investigate the equation of state of materials at pressures and densities which exist in the center of large exo-planets in a controlled laboratory system. We describe the design for experiments at the NIF, using a hohlraum drive to induce a spherically-converging shock wave in a polystyrene sphere. The geometric effects of the converging shock wave achieve pressures over 1Gbar at a radius of 100 microns from the center of the pellet. The shock speed and compression will be measured radiographically as the wave approaches the center of the sphere using an x-ray streak camera. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Hawreliak, J A AU - Swift, D AU - Doeppner, T AU - Kritcher, A AU - Eggert, J H AU - Collins, G AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR23B EP - 2414 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542974?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Gbar+equation+of+state+measurements+in+spherically+convergent+shock+experiments&rft.au=Hawreliak%2C+J+A%3BSwift%2C+D%3BDoeppner%2C+T%3BKritcher%2C+A%3BEggert%2C+J+H%3BCollins%2C+G%3BAnonymous&rft.aulast=Hawreliak&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Direct observation of phase transitions; in situ diffraction measurements at the crystal scale AN - 1637542940; 2014-104206 AB - Phase transitions often display determinate crystallographic orientation relationships between parent and symmetrically degenerate daughter domains. Preferred variant selection and orientation memory under the influence of deviatoric stress are the 'fingerprints' of the transformation mechanism, driving force, and microstructure. For the alpha -epsilon transition in iron - significant to the structure and anisotropy of the Earth's inner core - these have been studied primarily by texture analysis of polycrystalline powders; the convoluted nature of these data, however, render it essentially impossible to examine variant selection, and even precise orientation relationships themselves. Recently developed X-ray diffraction techniques have made it possible to answer these questions. Results from two measurements are presented. First, heterogeneous variant selection was observed and the specific alpha /epsilon orientation relationship was determined under quasi-static loading using High Energy Diffraction Microscopy at beamline 1-ID of APS-ANL. Second, the spatial heterogeneity and mutual exclusivity among epsilon variants was observed at the incipient transition using the Laue mu -diffraction technique at beamline 12.3.2. of ALS-LBNL. In both cases, a 60X25mu m single crystal of iron was pressurized in a DAC and measured before and after the alpha -epsilon transition at 13GPa. In the HEDM experiment, spatial resolution is sacrificed for domain-averaged orientation and strain resoltuion, making it possible to quantify the magnitude of the applied deviatoric stress in situ. In the Laue mu -Diffraction technique, the local lattice orientations are mapped with 1mu m resolution, displaying marked spatial variation. These pilot experiments open new possibilities for investigating high pressure/high temperature transformations in situ. By mapping both orientations and lattice strains, the nature of the mechanisms and driving forces can be illuminated. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. Funding through the Laboratory Directed Research and Development program (10- ERD-053) is gratefully acknowledged. JF - American Geophysical Union Fall Meeting AU - Bernier, J V AU - Barton, N R AU - Farber, D AU - Wenk, H AU - Kunz, M AU - Lienert, U AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR23A EP - 2388 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542940?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Direct+observation+of+phase+transitions%3B+in+situ+diffraction+measurements+at+the+crystal+scale&rft.au=Bernier%2C+J+V%3BBarton%2C+N+R%3BFarber%2C+D%3BWenk%2C+H%3BKunz%2C+M%3BLienert%2C+U%3BAnonymous&rft.aulast=Bernier&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Extreme chemistry; megabar shocks in precompressed nitrogen AN - 1637542584; 2014-104230 AB - Despite high stability due to its unique triple covalent bonding at ambient conditions, nitrogen exhibit dramatic changes in properties at megabar pressure. In particular, a polymeric solid phase above 110 GPa and a maximum in the melting line around 80 GPa have been experimentally observed and a first-order liquid-liquid phase transitions between the molecular fluid and a new polymeric fluid has been recently predicted through ab-initio DFT numerical simulations. We will present the results of the first laser-driven shock Hugoniot data in nitrogen up to 600 GPa and 50 000 K. Precompression within diamond anvil cells allows us to tune the initial density and therefore to probe a large region of the pressure-temperature-density space. Equation of state and reflectivity data obtained through the combination of interferometric velocimetry and streaked optical pyrometry and an impedance matching procedure using quartz as an in-situ standard will be discussed. JF - American Geophysical Union Fall Meeting AU - Millot, M A AU - Rygg, J R AU - Eggert, J H AU - Celliers, P M AU - Lazicki, A E AU - Collins, G AU - Jeanloz, R AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR23B EP - 2412 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542584?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Extreme+chemistry%3B+megabar+shocks+in+precompressed+nitrogen&rft.au=Millot%2C+M+A%3BRygg%2C+J+R%3BEggert%2C+J+H%3BCelliers%2C+P+M%3BLazicki%2C+A+E%3BCollins%2C+G%3BJeanloz%2C+R%3BAnonymous&rft.aulast=Millot&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Numerical and experimental approaches to study soil transport and clogging in granular filters AN - 1637540666; 2014-103936 AB - Failure of a dam by erosion ranks among the most serious accidents in civil engineering. The best way to prevent internal erosion is using adequate granular filters in the transition areas where important hydraulic gradients can appear. In case of cracking and erosion, if the filter is capable of retaining the eroded particles, the crack will seal and the dam safety will be ensured. Numerical modeling has proved to be a cost-effective tool for improving our understanding of physical processes. Traditionally, the consideration of flow and particle transport in porous media has focused on treating the media as continuum. Practical models typically address flow and transport based on the Darcy's law as a function of a pressure gradient and a medium-dependent permeability parameter. Additional macroscopic constitutes describe porosity, and permeability changes during the migration of a suspension through porous media. However, most of them rely on empirical correlations, which often need to be recalibrated for each application. Grain-scale modeling can be used to gain insight into scale dependence of continuum macroscale parameters. A finite element numerical solution of the Navier-Stokes equations for fluid flow together with Lagrange multiplier technique for solid particles was applied to the simulation of soil filtration in the filter layers of gravity dam. The numerical approach was validated through comparison of numerical simulations with the experimental results of base soil particle clogging in the filter layers performed at ERDC. The numerical simulation correctly predicted flow and pressure decay due to particle clogging. The base soil particle distribution was almost identical to those measured in the laboratory experiment. It is believed that the agreement between simulations and experimental data demonstrates the applicability of the proposed approach for prediction of the soil transport and clogging in embankment dams. To get more precise understanding of the soil transport in granular filters we investigated sensitivity of particle clogging mechanisms to various aspects such as particle size ration, the amplitude of hydraulic gradient, particle concentration and contact properties. By averaging the results derived from the grain-scale simulations, we investigated how those factors affect the semi-empirical multiphase model parameters in the large-scale simulation tool. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. The Department of Homeland Security Science and Technology Directorate provided funding for this research. JF - American Geophysical Union Fall Meeting AU - Kanarska, Y AU - Smith, Jarrell J AU - Ezzedine, S M AU - Lomov, I AU - Glascoe, L G AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H51G EP - 1437 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637540666?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+and+experimental+approaches+to+study+soil+transport+and+clogging+in+granular+filters&rft.au=Kanarska%2C+Y%3BSmith%2C+Jarrell+J%3BEzzedine%2C+S+M%3BLomov%2C+I%3BGlascoe%2C+L+G%3BAnonymous&rft.aulast=Kanarska&rft.aufirst=Y&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Towards automated processing and integration of InSAR and GPS data AN - 1637536220; 2014-103709 AB - Next year we anticipate the launches of two new InSAR satellites, ALOS-2 (L-band, R-L looking, 14-day repeat interval) and Sentinel-1 (C-band, 12-day repeat interval). These missions may offer global and frequent data acquisitions for constructing crustal dynamic time series. Our objective is to develop robust and open InSAR processing software and methods for routine time series analyses of these new data in combination with the GPS time series already available. We have focused our development in three areas: 1) automated alignment of large stacks of SAR images; 2) scansar-to-scansar interferometry; and 3) integration of InSAR and GPS velocities using (initially) secular models. Fully automated processing relies on the precise orbital information for mosaicking independently processed frames and scansar subswaths without ground control or least squares adjustments. The well-tested Generic Mapping Tools (GMT) provides the foundation for our InSAR processing system (GMTSAR), as well as all the tools needed for GPS/InSAR integration. GMTSAR includes only basic InSAR processing practices that have been benchmarked by the user community; more exotic integration and time series methods can be built on this foundational layer. Because of the very different space/time sampling characteristics of GPS and InSAR, we believe it is necessary to use a 4-D physical model for the complete integration. We provide an example of a secular velocity model of the entire San Andreas Fault System and discuss extensions to seasonal-resolution time series as well as scansar integration. JF - American Geophysical Union Fall Meeting AU - Sandwell, D T AU - Tong, X AU - Mellors, R J AU - Wei, M AU - Smith-Konter, B R AU - Wessel, P AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract G42A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637536220?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+automated+processing+and+integration+of+InSAR+and+GPS+data&rft.au=Sandwell%2C+D+T%3BTong%2C+X%3BMellors%2C+R+J%3BWei%2C+M%3BSmith-Konter%2C+B+R%3BWessel%2C+P%3BAnonymous&rft.aulast=Sandwell&rft.aufirst=D&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Nitrogen responses in groundwater, surface water and air following nitrate action plans in the Netherlands and Denmark AN - 1637533238; 2014-103875 AB - The emissions of nutrients to air and water tend to increase worldwide. Both The Netherlands and Denmark are notorious for large inputs of nutrients in intensive agricultural practice in the previous 60 years. However, both countries have established legislation and action programs to reduce the supply and impacts of nutrients to air, groundwater and surface waters since 1985. This presentation analyses the response of nitrogen in air, surface water and groundwater following these action programs over the period 1985-2010. Responses of agriculturally derived N in air show a significant and rapid decrease since the beginning of these programs. Responses of N concentrations in many Dutch and Danish agriculturally dominated watersheds are also rapid. A clear response of nitrate-N in groundwater was revealed by age dating the water and simulations show that this also leads to a quick response of N outflow to surface waters. The rapid response of surface water is contra dictionary to the generally accepted idea that the slow transport of the groundwater N pool tends to lengthen the time scales necessary for the full recovery of N concentrations in surface waters. We stipulate that the young and shallow component of groundwater flow can discharge previously applied N effectively which causes the improvement of shallow groundwater quality to be reflected in the quick surface water response. While delay of N discharge may be true for areas with thick unsaturated zones and very limited agricultural use close to water courses, this is clearly not the case for areas with pronounced groundwater-surface water interaction such as the Netherlands delta setting or the Danish estuarine setting. The Dutch and Danish results show that N fluxes towards air and water can be managed and effectively monitored, which may help to counteract the increasing nutrient emissions in other densely populated and intensively used parts of the world. In order to predict time scales for recovery, it is advised to assess the complete travel time distribution of outflowing groundwater instead of focusing on concepts based on mean residence time. JF - American Geophysical Union Fall Meeting AU - Broers, H AU - Rozemeijer, Joachim AU - Visser, A AU - Kronvang, B AU - Erisman, J W AU - Refsgaard, J C AU - Thorling, L AU - Slomp, C P AU - Prommer, Henning AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H43I EP - 07 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637533238?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Nitrogen+responses+in+groundwater%2C+surface+water+and+air+following+nitrate+action+plans+in+the+Netherlands+and+Denmark&rft.au=Broers%2C+H%3BRozemeijer%2C+Joachim%3BVisser%2C+A%3BKronvang%2C+B%3BErisman%2C+J+W%3BRefsgaard%2C+J+C%3BThorling%2C+L%3BSlomp%2C+C+P%3BPrommer%2C+Henning%3BAnonymous&rft.aulast=Broers&rft.aufirst=H&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H43I/abstracts/H43I-07.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Impact of the leaked CO (sub 2) from deep reservoirs on quality of shallow groundwater AN - 1637531193; 2014-101050 AB - One of the areas of concerns for geologic CO2 sequestration is the potential leakage of CO2 and brine from deeper storage reservoirs to shallow groundwater resources. This could lead to changes in shallow groundwater chemistry degrading water quality. As part of the National Risk Assessment Partnership (NRAP) for geologic CO2 sequestration project, we perform experimental and modeling studies to understand the mechanisms of the leaked CO2 and brine flow, transport and reaction with aquifer water and minerals. We have developed a 3-dimensional heterogeneous numerical model for an unconfined shallow aquifer that is being used to simulate the CO2 leakage and the associated geochemical interactions over 200 years. A Monte-Carlo analysis is performed to estimate the probability of plume sizes of the pH less than 6.5 and TDS larger than 500 ppm in the shallow aquifer. The metrics were chosen as proxies that indicate how groundwater quality is affected by leakage. The uncertain parameters in our study include five for describing geologic heterogeneity in the permeability (permeability mean, variance, integral range, anisotropic factor and porosity), one for lateral flow rate and five for defining the CO2 leakage rate in temporal and spatial domains. A global sensitivity analysis is conducted for three outputs (the amount of CO2 leaving the top of aquifer, the plume sizes of pH below 6.5 and TDS over 500 ppm). Finally, we derive one-, two- and three-dimensional response surfaces developed based on the 2000 process modeling results of CO2 and brine reactive transport models. These response surfaces have been incorporated into the system model CO2-PENS in order to calculate risk profiles that consider uncertainty in the sequestration reservoir, leaky wellbore and the shallow groundwater aquifer. JF - American Geophysical Union Fall Meeting AU - Dai, Z AU - Keating, E H AU - Viswanathan, H S AU - Pawar, R J AU - Bacon, D H AU - Carroll, S AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H33L EP - 01 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637531193?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+the+leaked+CO+%28sub+2%29+from+deep+reservoirs+on+quality+of+shallow+groundwater&rft.au=Dai%2C+Z%3BKeating%2C+E+H%3BViswanathan%2C+H+S%3BPawar%2C+R+J%3BBacon%2C+D+H%3BCarroll%2C+S%3BAnonymous&rft.aulast=Dai&rft.aufirst=Z&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Dimension reduction and Bayesian inference in reactive transport with embedded capability for uncertainty quantification AN - 1637531094; 2014-101025 AB - This research work presents an integrated uncertainty quantification capability comprising uncertainty analysis, sensitivity analysis, and Bayesian inference techniques suitable for modern-day component-based development paradigm for multi-physics simulations. The unique feature of our approach is that our flexible, modular UQ methodology facilitates independent development of the most suitable UQ method, intrusive or non-intrusive, for each physics module by using stochastic domain decomposition techniques. We will demonstrate our modular UQ Bayesian inference and dynamic dimension reduction capabilities on a practical application involving a multi-species flow and reactive transport in randomly heterogeneous porous media. JF - American Geophysical Union Fall Meeting AU - Chen, X AU - Sun, Y AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H33I EP - 1436 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637531094?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Dimension+reduction+and+Bayesian+inference+in+reactive+transport+with+embedded+capability+for+uncertainty+quantification&rft.au=Chen%2C+X%3BSun%2C+Y%3BAnonymous&rft.aulast=Chen&rft.aufirst=X&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Introducing the global carbon cycle to middle school students with a (super 14) C research project AN - 1637530998; 2014-100839 AB - Global Climate Change (GCC) is currently not part of the California Science Standards for 7th grade. Required course elements, however, such as the carbon cycle, photosynthesis, and cellular respiration could be linked to global climate change. Here we present a lesson plan developed in collaboration with scientists from Lawrence Livermore National Laboratory, to involve 7th grade students in monitoring of fossil fuel emissions in the Richmond/San Pablo area of California. -The lesson plan is a Greenhouse Gas/Global Climate Change Unit, with an embedded research project in which students will collect plant samples from various locals for analysis of 14C, to determine if there is a correlation between location and how much CO2 is coming from fossil fuel combustion. Main learning objectives are for students to: 1) understand how fossil fuel emissions impact the global carbon cycle, 2) understand how scientists estimate fossil CO2 emissions, and 3) engage in hypothesis development and testing. This project also engages students in active science learning and helps to develop responsibility, two key factors for adolescents. We expect to see a correlation between proximity to freeways and levels of fossil fuel emissions. This unit will introduce important GCC concepts to students at a younger age, and increase their knowledge about fossil fuel emissions in their local environment, as well as the regional and global impacts of fossil emissions. JF - American Geophysical Union Fall Meeting AU - Brodman Larson, L AU - Phillips, C L AU - LaFranchi, B W AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract ED13C EP - 0799 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637530998?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Introducing+the+global+carbon+cycle+to+middle+school+students+with+a+%28super+14%29+C+research+project&rft.au=Brodman+Larson%2C+L%3BPhillips%2C+C+L%3BLaFranchi%2C+B+W%3BAnonymous&rft.aulast=Brodman+Larson&rft.aufirst=L&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Probabilistic risk assessment framework for CO2 leakages through porous fractured caprock AN - 1637530828; 2014-100962 AB - Leakage to the atmosphere of a significant fraction of injected CO2 would constitute a failure of a geological CO2 storage project from a greenhouse gas mitigation perspective. We present a numerical model that simulates flow and transport of CO2 into a multi-layered subsurface system. The model uses state-of-the-art multi-threaded finite element methods and unstructured adaptive mesh refinement scheme. Several scenarios spanning from a homogeneous single layered reservoir to heterogeneous multi-layered systems, which including cap-rock with embedded fractures, have been simulated under different operations of CO2 injection and CO2 leaking conditions. Results show the impact of the injection and leakage rates on the time-evolution of the spread of the CO2 plume, its interception of the fractured cap-rock and the risk associated with the contamination of the overlaying aquifer. Spatial and temporal moments have been calculated for different, deterministic of stochastic, subsurface physical and chemical properties. Spatial moments enable assessing the extent of the region of investigation under conditions of uncertainty. Furthermore, several leakage scenarios show the intermittence behavior and development of the CO2 plume in the subsurface; its first interception with the fractures located further far from the injection well then, at a second stage, its interception with the fracture within the immediate vicinity of the injection well. JF - American Geophysical Union Fall Meeting AU - Lomov, I AU - Ezzedine, S M AU - McNab, W W AU - Ryerson, F J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H32F EP - 08 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637530828?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Probabilistic+risk+assessment+framework+for+CO2+leakages+through+porous+fractured+caprock&rft.au=Lomov%2C+I%3BEzzedine%2C+S+M%3BMcNab%2C+W+W%3BRyerson%2C+F+J%3BAnonymous&rft.aulast=Lomov&rft.aufirst=I&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Uncertainty analysis of simulated hydraulic fracturing AN - 1637526936; 2014-101034 AB - Artificial hydraulic fracturing is being used widely to stimulate production of oil, natural gas, and geothermal reservoirs with low natural permeability. Optimization of field design and operation is limited by the incomplete characterization of the reservoir, as well as the complexity of hydrological and geomechanical processes that control the fracturing. Thus, there are a variety of uncertainties associated with the pre-existing fracture distribution, rock mechanics, and hydraulic-fracture engineering that require evaluation of their impact on the optimized design. In this study, a multiple-stage scheme was employed to evaluate the uncertainty. We first define the ranges and distributions of 11 input parameters that characterize the natural fracture topology, in situ stress, geomechanical behavior of the rock matrix and joint interfaces, and pumping operation, to cover a wide spectrum of potential conditions expected for a natural reservoir. These parameters were then sampled 1,000 times in an 11-dimensional parameter space constrained by the specified ranges using the Latin-hypercube method. These 1,000 parameter sets were fed into the fracture simulators, and the outputs were used to construct three designed objective functions, i.e. fracture density, opened fracture length and area density. Using PSUADE, three response surfaces (11-dimensional) of the objective functions were developed and global sensitivity was analyzed to identify the most sensitive parameters for the objective functions representing fracture connectivity, which are critical for sweep efficiency of the recovery process. The second-stage high resolution response surfaces were constructed with dimension reduced to the number of the most sensitive parameters. An additional response surface with respect to the objective function of the fractal dimension for fracture distributions was constructed in this stage. Based on these response surfaces, comprehensive uncertainty analyses were conducted among input parameters and objective functions. In addition, reduced-order emulation models resulting from this analysis can be used for optimal control of hydraulic fracturing. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Chen, M AU - Sun, Y AU - Fu, P AU - Carrigan, C R AU - Lu, Z AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H33I EP - 1449 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637526936?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Uncertainty+analysis+of+simulated+hydraulic+fracturing&rft.au=Chen%2C+M%3BSun%2C+Y%3BFu%2C+P%3BCarrigan%2C+C+R%3BLu%2C+Z%3BAnonymous&rft.aulast=Chen&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Uncertainty quantification of CO (sub 2) saturation estimated from electrical resistivity tomography data at the SECARB Cranfield site AN - 1637526823; 2014-101102 AB - Estimation of CO2 saturation with its associated uncertainty in an underground CO2 reservoir during a CO2 injection process can aid the risk assessment of potential CO2 leakage. Time lapse electrical resistivity tomography (ERT) was used effectively for tracking CO2 plume migration in a saline environment at the SECARB Cranfield site. It is clear that displacement of saline fluids by supercritical CO2 increases formation resistivity significantly. We inverted time lapse resistivity data by using a deterministic least squares type inverse method for subsurface resistivity models. CO2 saturation can be derived from resistivity data by substituting saline fluids with insulating CO2 in the Archie's equation. Our inversion results clearly revealed the development of a CO2 plume in the reservoir. The degree of uncertainty in the estimates of CO2 saturation is unknown but needed in the verification and accounting of CO2 in the storage. We are developing an uncertainty quantification (UQ) method to assess the uncertainty of CO2 saturation derived from ERT data. This UQ approach consists of three steps. We first estimated the observation errors based on repeat and reciprocal ERT measurements. This step produced mean and standard deviation of observations. The second step is driven by the LLNL PSUADE UQ tool that repeatedly samples data noises and launches deterministic ERT inversion. Finally, a posteriori covariance matrix of CO2 saturation can then be obtained from a large number of samples of CO2 saturation estimates. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. Lawrence Livermore National Security, LLC. LLNL-ABS-569132. JF - American Geophysical Union Fall Meeting AU - Yang, X AU - Carrigan, C R AU - Chen, X AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H41C EP - 1185 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637526823?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Uncertainty+quantification+of+CO+%28sub+2%29+saturation+estimated+from+electrical+resistivity+tomography+data+at+the+SECARB+Cranfield+site&rft.au=Yang%2C+X%3BCarrigan%2C+C+R%3BChen%2C+X%3BAnonymous&rft.aulast=Yang&rft.aufirst=X&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Sorption/desorption interactions of plutonium with montmorillonite AN - 1629943325; 2014-093360 AB - Plutonium (Pu) release to the environment through nuclear weapon development and the nuclear fuel cycle is an unfortunate legacy of the nuclear age. In part due to public health concerns over the risk of Pu contamination of drinking water, predicting the behavior of Pu in both surface and sub-surface water is a topic of continued interest. Typically it was assumed that Pu mobility in groundwater would be severely restricted, as laboratory adsorption studies commonly show that naturally occurring minerals can effectively remove plutonium from solution. However, evidence for the transport of Pu over significant distances at field sites highlights a relative lack of understanding of the fundamental processes controlling plutonium behavior in natural systems. At several field locations, enhanced mobility is due to Pu association with colloidal particles that serve to increase the transport of sorbed contaminants (Kersting et al., 1999; Santschi et al., 2002, Novikov et al., 2006). The ability for mineral colloids to transport Pu is in part controlled by its oxidation state and the rate of plutonium adsorption to, and desorption from, the mineral surface. Previously we have investigated the adsorption affinity of Pu for montmorillonite colloids, finding affinities to be similar over a wide range of Pu concentrations. In the present study we examine the stability of adsorbed Pu on the mineral surface. Pu(IV) at an initial concentration of 10-10 M was pre-equilibrated with montmorillonite in a background electrolyte at pH values of 4, 6 and 8. Following equilibration, aliquots of the suspensions were placed in a flow cell and Pu-free background electrolyte at the relevant pH was passed through the system. Flow rates were varied in order to investigate the kinetics of desorption and hence gain a mechanistic understanding of the desorption process. The flow cell experiments demonstrate that desorption of Pu from the montmorillonite surface cannot be modeled as a simple first order process. Furthermore, a pH dependence was observed, with less desorbed at pH 4 compared to pH 8. We suggest the pH dependence is likely controlled by reoxidation of Pu(IV) to Pu(V) and aqueous speciation. We will present models used to describe desorption behavior and discuss the implications for Pu transport. This work was funded by U. S. DOE Office of Biological & Environmental Sciences, Subsurface Biogeochemistry Research Program, and performed under the auspices of the U. S. Department of Energy by Lawrence Livermore National Security, LLC under Contract DE-AC52-07NA27344. LLNL-ABS-570161 JF - American Geophysical Union Fall Meeting AU - Begg, J AU - Zavarin, M AU - Zhao, P AU - Kersting, A B AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H12D EP - 05 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943325?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sorption%2Fdesorption+interactions+of+plutonium+with+montmorillonite&rft.au=Begg%2C+J%3BZavarin%2C+M%3BZhao%2C+P%3BKersting%2C+A+B%3BAnonymous&rft.aulast=Begg&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H12D/abstracts/H12D-05.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Uncertainty quantification of barometric driven gas transport in fractured rock AN - 1629942773; 2014-093189 AB - Cyclic variation in surface pressure, known as barometric pumping, results in the upward migration of subsurface gas through fractured rock. In systems characterized by highly permeable fractures, the barometric effect can penetrate to depths of hundreds of meters. The geological structure and many physical and chemical properties, which control the concentration profiles of gas components observed at the ground surface, are partially known or uncertain. However, the temporal fluctuations in concentrations of gas components monitored at the ground surface can be used, in principle, to estimate the gas transport parameters (e.g., permeability, dispersivity, capillary pressure parameters) at depth. In this study, we present a combined simulation-emulation approach for quantifying uncertainty propagation from uncertain inputs to surface gas concentrations. A deterministic model of multiphase reactive transport in a dual-permeability domain is developed to describe the physical transport processes. By solving this forward deterministic model for a large number of sample points spanning the parameter ranges of uncertainty, surrogate or reduced order models of temporal gas concentrations at ground surface are developed as functions of uncertain parameters. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Sun, Y AU - Carrigan, C R AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H11A EP - 1140 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629942773?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Uncertainty+quantification+of+barometric+driven+gas+transport+in+fractured+rock&rft.au=Sun%2C+Y%3BCarrigan%2C+C+R%3BAnonymous&rft.aulast=Sun&rft.aufirst=Y&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H11A/abstracts/H11A-1140.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Towards a spatially and temporally constant Karakorum fault slip rate AN - 1629942463; 2014-093063 AB - Constraining the Karakorum fault (KF) slip-rate is essential to understand the present-day kinematic role of large strike-slip faults in the deformation of Tibet. The range of geodetic and geologic slip-rates is approximately 0 - 11 mm/yr. Cumulative offsets of alluvial fans and terrace risers ranging from 38 to 220 m add new quantitative information on its late Quaternary slip-rate. Their ages were determined using 10Be surface-exposure dating of 74 samples collected at 3 alluvial sites along the Bangong - Chaxikang and Gar basin segments, southeast of Bangong Lake. The slip-rate during the 0 - 60 ka period is 2.9(+1.0/-0.6) mm/yr at GUN, >5.3(+4.3/-1.7) mm/yr at CK and >5.3(+3.1/-2.3) mm/yr at GF. These rates are in agreement with those determined to the southeast (>5.5+ or -0.5 mm/yr at Manikala on one strand for the same period, Chevalier et al., 2005a,b; 7.1(+3.2/-1.7) mm/yr at Menshi and 7.9(+3.2/-2.5) mm/yr near Kailas across two strands, Chevalier et al., 2012) and to the northwest (4+ or -1 mm/yr at Tangste, Brown et al., 2002; >5 mm/yr at Muji, Chevalier et al., 2011b, both on one strand, during the Holocene). We suggest that the minimum late Quaternary slip-rate along the entire length of the KF may be relatively constant along-strike at >5 mm/yr on one fault branch or >7 mm/yr across two branches. In addition to being spatially constant, this late Quaternary rate appears to be, within error, in agreement with most studies at various timescales and suggests that at first approximation, no major discrepancy exists between geodetic and geologic rates. JF - American Geophysical Union Fall Meeting AU - Chevalier, M AU - van der Woerd, J AU - Tapponnier, P AU - Li, H AU - Ryerson, F J AU - Finkel, R C AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract G23B EP - 0934 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629942463?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+a+spatially+and+temporally+constant+Karakorum+fault+slip+rate&rft.au=Chevalier%2C+M%3Bvan+der+Woerd%2C+J%3BTapponnier%2C+P%3BLi%2C+H%3BRyerson%2C+F+J%3BFinkel%2C+R+C%3BAnonymous&rft.aulast=Chevalier&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - New insights into stability of plutonium intrinsic colloids in the presence of clay at elevated temperatures; experimental and modeling approaches AN - 1629942082; 2014-093359 AB - Colloid-facilitated plutonium transport is often found to be the dominant mechanism controlling its migration in the environment. However, the form of Pu (intrinsic versus pseudo-colloid) and its stability is not well understood. Accurate prediction of colloid-facilitated transport requires a deep understanding of the underlying mechanisms and rates that control the stability of colloidal plutonium. In the present study, we examine the stability of Pu intrinsic colloids relative to Pu-montmorillonite pseudo colloids using a novel experimental design and modeling approaches. We gain new insights into mechanisms of interactions between Pu intrinsic colloids and montmorrilonite clay colloids. The results of these efforts provide a clearer understanding of how Pu can migrate over significant temporal and spatial scales. We employ dialysis membranes in an effort to completely segregate Pu intrinsic colloids (2-5 nm) from montmorillonite clay colloids (>100 nm) and allow aqueous Pu to establish equilibrium between both colloidal phases. Using the dialysis membrane approach, we are able to isolate multiple processes, including hydrolysis/precipitation of Pu(IV, aq), dissolution of PuO (sub 2) intrinsic colloids in the absence and presence of the clay, and formation of Pu/clay pseudo-colloids. Therefore, the kinetics of these multiple processes that take place either sequentially or simultaneously in our systems can be examined individually. Experiments are conducted in pH 8 solution of 5 mM NaCl/0.7 mM NaHCO (sub 3) at both 25 and 80 degrees C. Pu intrinsic colloids dissolve at a moderate rate in the absence of the clay, and the dissolution is enhanced in the presence of clay. Furthermore, an elevated temperature will increase the solubility of Pu intrinsic colloids. The formation of Pu intrinsic colloid is reversible, though dissolution is kinetically limited. In contrast, Pu pseudo colloids (sorbed Pu on clay) are more stable than Pu intrinsic colloids at both temperatures, and the affinity of Pu for the clay increases with temperature as an increased K (sub d) is obtained at the higher temperature. This result suggests that sorption of Pu on montmorillonite clay minerals is endothermic. We conclude that Pu intrinsic colloids tend to dissolve in the presence of montmorillonite and yield Pu pseudo colloids. This fact may limit the migration of Pu intrinsic colloids. On the other hand, the more stable Pu-clay pseudo colloids may play more important role in Pu transport in the environment over significant temporal and spatial scales. This work was performed with funding from the Department of Energy, Nuclear Energy Used Fuel Disposition Program. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Zhao, P AU - Sun, Y AU - Zavarin, M AU - Dai, Z AU - Carroll, S AU - Kersting, A B AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H12D EP - 04 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629942082?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=New+insights+into+stability+of+plutonium+intrinsic+colloids+in+the+presence+of+clay+at+elevated+temperatures%3B+experimental+and+modeling+approaches&rft.au=Zhao%2C+P%3BSun%2C+Y%3BZavarin%2C+M%3BDai%2C+Z%3BCarroll%2C+S%3BKersting%2C+A+B%3BAnonymous&rft.aulast=Zhao&rft.aufirst=P&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H12D/abstracts/H12D-04.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integrated, geothermal-CO (sub 2) storage; an adaptable, hybrid, multi-stage, energy-recovery approach to reduce carbon intensity and environmental risk AN - 1629940742; 2014-093340 AB - The challenges of mitigating climate change and generating sustainable renewable energy are inseparable and can be addressed by synergistic integration of geothermal energy production with secure geologic CO2 storage (GCS). Pressure buildup can be a limiting factor for GCS and geothermal reservoir operations, due to a number of concerns, including the potential for CO2 leakage and induced seismicity, while pressure depletion can limit geothermal energy recovery. Water-use demands can also be a limiting factor for GCS and geothermal operations, particularly where water resources are already scarce. Economic optimization of geothermal-GCS involves trade-offs of various benefits and risks, along with their associated costs: (1) heat extraction per ton of delivered CO2, (2) permanent CO2 storage, (3) energy recovery per unit well (and working-fluid recirculation) costs, and (4) economic lifetime of a project. We analyze a hybrid, multi-stage approach using both formation brine and injected CO2 as working fluids to attempt to optimize the benefits of sustainable energy production and permanent CO2 storage, while conserving water resources and minimizing environmental risks. We consider a range of well-field patterns and operational schemes. Initially, the fluid production is entirely brine. After CO2 breakthrough, the fraction of CO2 in production, which is called the CO2 "cut", increases with time. Thus, brine is the predominant working fluid for early time, with the contribution of CO2 to heat extraction increasing with CO2 cut (and time). We find that smaller well spacing between CO2 injectors and producers favors earlier CO2 breakthrough and a more rapid rise in CO2 cut, which increases the contribution of recirculated CO2, thereby improving the heat extraction per ton of delivered CO2. On the other hand, larger well spacing increases permanent CO2 storage, energy production per unit well cost, while reducing the thermal drawdown rate, which extends the economic lifetime of a project. For the range of cases considered, we were never able to eliminate the co-production of brine; thus, brine management is likely to be important for reservoir operations, whether or not brine is considered as a candidate working fluid. Future work will address site-specific reservoir conditions and infrastructure factors, such as proximity to potential CO2 sources. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Buscheck, T A AU - Chen, M AU - Lu, C AU - Sun, Y AU - Hao, Y AU - Elliot, T R AU - Celia, M A AU - Bielicki, J M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H11O EP - 07 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940742?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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%2C+geothermal-CO+%28sub+2%29+storage%3B+an+adaptable%2C+hybrid%2C+multi-stage%2C+energy-recovery+approach+to+reduce+carbon+intensity+and+environmental+risk&rft.au=Buscheck%2C+T+A%3BChen%2C+M%3BLu%2C+C%3BSun%2C+Y%3BHao%2C+Y%3BElliot%2C+T+R%3BCelia%2C+M+A%3BBielicki%2C+J+M%3BAnonymous&rft.aulast=Buscheck&rft.aufirst=T&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H11O/abstracts/H11O-07.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Enhancing the sustainability of EGS using colloidal silica gel AN - 1629940732; 2014-093335 AB - We carried out modeling studies to demonstrate how the silica agent can be used and show how we anticipate the silica blocking and diverting agent will perform in a fractured and/or porous geothermal reservoir. The modeling code enables us to calculate the drawdown and flow rates for desired scenarios for comparison to those without the silica blocking agent. We illustrate gel deployment in 1) a single fracture, 2) a three dimensional fracture network, 3) a three dimensional porous media reservoir to demonstrate enhancing the sustainability of heat extraction and minimizing water uses. Logistics for a parametric study for optimal use of silica gel are discussed. We conclude by a short discussion on gel deployment under conditions of uncertainty in the subsurface characterization. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Bourcier, W AU - Ezzedine, S M AU - Hunt, Jonathan D AU - Roberts, S K AU - Roberts, J J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H11O EP - 02 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940732?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Enhancing+the+sustainability+of+EGS+using+colloidal+silica+gel&rft.au=Bourcier%2C+W%3BEzzedine%2C+S+M%3BHunt%2C+Jonathan+D%3BRoberts%2C+S+K%3BRoberts%2C+J+J%3BAnonymous&rft.aulast=Bourcier&rft.aufirst=W&rft.date=2012-12-01&rft.volume=17&rft.issue=3&rft.spage=21&rft.isbn=&rft.btitle=&rft.title=Archives+of+Psychiatry+and+Psychotherapy&rft.issn=15092046&rft_id=info:doi/10.12740%2FAPP%2F59050 L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H11O/abstracts/H11O-02.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Modeling mechanically-induced permeability changes in subsurface reservoirs AN - 1629940472; 2014-092870 AB - Several energy technologies--including carbon sequestration, geothermal energy, and shale gas production--involve injecting large volumes of fluid into the subsurface. These injections inevitably change in-situ effective stress condition, which in turn can lead to important changes in permeability. New fluid migration pathways may be created, and existing ones may be enhanced. From a computational perspective, modeling these processes introduces a variety of challenges--including strong hydromechanical coupling, large length-scale disparities, and highly nonlinear constitutive behavior. As a motivating example, here we consider a mixed finite element formulation of multiphase fluid flow through deformable porous media. A coupled damage/permeability model is introduced to model the rock constitutive behavior. At each timestep, the resulting discrete, nonlinear system is solved using a Newton-Krylov algorithm. A key challenge that has prevented wide-scale adoption of fully-coupled models is the lack of good preconditioning strategies for this class of problems. In light of this need, we discuss a block-structured approach that leads to scalable behavior. This work was performed under the auspices of the U. S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - White, J A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract DI22A EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940472?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Archives+of+Psychiatry+and+Psychotherapy&rft.atitle=Value+systems+and+religiosity+as+predictors+of+non-religious+and+religious+coping+with+stress+in+early+adulthood&rft.au=Krok%2C+Dariusz&rft.aulast=Krok&rft.aufirst=Dariusz&rft.date=2015-09-01&rft.volume=17&rft.issue=3&rft.spage=21&rft.isbn=&rft.btitle=&rft.title=Archives+of+Psychiatry+and+Psychotherapy&rft.issn=15092046&rft_id=info:doi/10.12740%2FAPP%2F59050 LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Simulation of hydraulic fracture networks in three dimensions utilizing massively parallel computing platforms AN - 1629940257; 2014-095852 AB - Hydraulic fracturing has been an enabling technology for commercially stimulating fracture networks for over half of a century. It has become one of the most widespread technologies for engineering subsurface fracture systems. Despite the ubiquity of this technique in the field, understanding and prediction of the hydraulic induced propagation of the fracture network in realistic, heterogeneous reservoirs has been limited. A number of developments in multiscale modeling in recent years have allowed researchers in related fields to tackle the modeling of complex fracture propagation as well as the mechanics of heterogeneous materials. These developments, combined with advances in quantifying solution uncertainties, provide possibilities for the geologic modeling community to capture both the fracturing behavior and longer-term permeability evolution of rock masses under hydraulic loading across both dynamic and viscosity-dominated regimes. Here we will demonstrate the first phase of this effort through illustrations of fully three-dimensional, tightly coupled hydromechanical simulations of hydraulically induced fracture network propagation run on massively parallel computing scales, and discuss preliminary results regarding the mechanisms by which fracture interactions and the accompanying changes to the stress field can lead to deleterious or beneficial changes to the fracture network. JF - American Geophysical Union Fall Meeting AU - Settgast, R R AU - Johnson, S AU - Fu, P AU - Walsh, S D AU - Ryerson, F J AU - Antoun, T AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H13G EP - 1442 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940257?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Simulation+of+hydraulic+fracture+networks+in+three+dimensions+utilizing+massively+parallel+computing+platforms&rft.au=Settgast%2C+R+R%3BJohnson%2C+S%3BFu%2C+P%3BWalsh%2C+S+D%3BRyerson%2C+F+J%3BAntoun%2C+T%3BAnonymous&rft.aulast=Settgast&rft.aufirst=R&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H13G/abstracts/H13G-1442.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Study of Np(V) sorption by ionic exchange on Na, K, Ca and Mg-montmorillonite AN - 1629940178; 2014-095837 AB - The transport behavior of actinides in soil and ground water are highly influenced by clay minerals due to their ubiquity in the environment, reactivity and colloidal properties. Neptunium(V) has been introduced in the environment as a result of nuclear weapons testing and is a radionuclide of potential interest for safety assessment of high level radioactive waste disposal because its long half-life and high toxicity. Surface complexation and ionic exchange have been identified as Np(V) sorption mechanisms onto montmorillonite. At pH below 5, Np(V) sorption is mainly attributed to ionic exchange. This study examines Np(V) ion exchange on Na, K, Ca and Mg forms of montmorillonite. Experiments were carried out using (super 237) Np concentrations between 2X10 (super -8) M and 5X10 (super -6) M at three different ionic strengths 0.1, 0.01 and 0.001 M. The pH was maintained at 4.5. Np(V) sorption to montmorillonite homoionized with monovalent cations (Na and K) demonstrated a markedly different behavior to that observed for montmorillonite homoionized with divalent cations (Ca and Mg). Np sorption to Na and K-montmorillonite was greater than Np sorption to Ca and Mg-montmorillonite. Isotherms with Na and K-montmorillonite showed a strong dependence on ionic strength: the percentage of Np adsorbed was near zero at 0.1 M ionic strength, but increased to 30% at 0.001 M ionic strength. This suggests ionic exchange is the main Np adsorption mechanism under the experimental conditions investigated. Dependence on ionic strength was not observed in the Np sorption isotherms for Ca and Mg-montmorillonite indicating a low exchange capacity between Np and divalent cations. Modeling of the sorption experimental data will allow determination of the Na (super +) NpO (sub 2) and K (super +) NpO (sub 2) ionic exchange constants on montmorillonite. JF - American Geophysical Union Fall Meeting AU - Benedicto, Ana AU - Begg, J AU - Zhao, P AU - Kersting, A B AU - Zavarin, M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H13E EP - 1409 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940178?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Study+of+Np%28V%29+sorption+by+ionic+exchange+on+Na%2C+K%2C+Ca+and+Mg-montmorillonite&rft.au=Benedicto%2C+Ana%3BBegg%2C+J%3BZhao%2C+P%3BKersting%2C+A+B%3BZavarin%2C+M%3BAnonymous&rft.aulast=Benedicto&rft.aufirst=Ana&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H13E/abstracts/H13E-1409.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Cement/caprock fracture healing experiments to assess the integrity of CO (sub 2) injection wells AN - 1629940060; 2014-095881 AB - It has been speculated that fractures along wellbore cement/caprock interfaces may provide a path for release of carbon from both long-term sequestration-sites and CO2-based enhanced oil recovery operations. The goal of this study is to evaluate the potential for fracture growth and healing in the wellbore environment, and its impact on wellbore permeability. A series of flow-through experiments was conducted, in which sample cores containing a planar fracture between impermeable caprock (compacted quartz, from 13,927' depth in Kern County) and cement (Portland G cured by ATSM standards) were reacted with brine containing variable amounts of carbonic acid (pCO2 between 0 and 3 MPa). The initial fracture geometry was controlled by grinding the caprock and cement pieces flat, and then bead blasting topography into the cement surfaces. Runs lasted 4-8 days with cores and brine maintained at constant temperature (60 degrees C). Constant confining pressure (24.8 MPa) was applied to cores, while brine was flowed with constant rates (0.05-0.10 mL/min) and pore pressure (12.4 MPa). Geomechanical and geochemical responses of the fractures were monitored by in situ measurements of differential pressure, and by periodically sampling output brine to analyze compositional changes. In every experiment the total permeability of samples cores decreased substantially. For runs using brine with pCO2=3 MPa, sample permeability continually decreased by over a factor of 200. Sample permeability also decreased by a factor of 50 having stabilized after approximately 3 days in a run using brine without CO2 (pCO2=0 MPa). These reductions in permeability appear to be the result of chemically-induced changes to the mechanical properties of the cement surface. Prior to reaction, the cement-caprock samples had high strength and elastic response to changes in stress during loading. After the experiments, the samples were weaker, and showed inelastic response to changes in stress during unloading. All cement surfaces exposed to CO2-rich brine were heavily reacted, as evidenced by coatings of rust-colored amorphous material. X-ray micro-tomography images revealed a series of reaction zones consistent with the results of related experiments by other researchers [e.g. Kutchko et al. 2007]. The mechanical properties of the individual reaction zones were evaluated by nano-indentation. Sampling during runs indicated that brine with pCO2=3 MPa became substantially enriched in Ca, Si, and Al, whereas composition of output brine with pCO2=0 MPa had little change over the run duration. The enrichment of Al in the brine with pCO2=3 MPa indicates that both Al-bearing minerals and amorphous calcium-silicate-hydrate (CSH) dissolved from the cement. Geochemical reaction pathways were further characterized in the reacted zones with the cement by scanning electron microscope, x-ray diffraction, and solid state NMR spectroscopy. These results suggest that the evolution of fractures in our experiments are determined by 3 competing factors: 1) swelling of CSH through hydration from the brine, 2) dissolution of cement into brine containing CO2, and 3) mechanical weakening of cement by chemical reaction with CO2. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract W-7405-Eng-48 and Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Du Frane, W L AU - Mason, H E AU - Walsh, S D AU - Ruddle, D G AU - Carroll, S AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H13L EP - 04 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940060?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cement%2Fcaprock+fracture+healing+experiments+to+assess+the+integrity+of+CO+%28sub+2%29+injection+wells&rft.au=Du+Frane%2C+W+L%3BMason%2C+H+E%3BWalsh%2C+S+D%3BRuddle%2C+D+G%3BCarroll%2C+S%3BAnonymous&rft.aulast=Du+Frane&rft.aufirst=W&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H13L/abstracts/H13L-04.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Investigating tungsten concentrations and isotopic compositions of natural water samples from the Carson River basin AN - 1629939876; 2014-096097 AB - Recent studies have shown that W-isotopes may fractionate in nature; however, the magnitude and cause of the isotopic variations are largely unknown and unconstrained. In this study, the isotopic compositions of the NIST 3163 W standard, W ore minerals, and 15 natural surface waters from Nevada's Carson River Basin were analyzed by MC-ICP-MS using external bracketing with NIST 3163 and the IUPAC (super 184) W/ (super 183) W for mass bias correction. Chemical separation procedures were developed to purify W from natural matrices and tested to assure fractionation was not introduced during column chemistry. The W isotopic compositions of these samples were measured and compared to the accepted IUPAC composition of natural W. Samples of wolframite (Fe, MnWO (sub 4) ) and hubnerite (MnWO (sub 4) ) have compositions similar to the IUPAC value but vary from the isotopic composition of NIST 3163--particularly in (super 182) W/ (super 183) W. The isotopic compositions of the natural waters, except for an extremely evaporated sample from Soda Lake, are similar to the NIST standard. This evaporative lake, formed by a maar, has a unique chemical composition compared to other surface waters with high W (800+ or -20 ng/g) and As (1665+ or -17 ng/g) concentrations; and relatively low Fe (5.00+ or -0.13 ng/g) and Mn (0.52+ or -0.07 ng/g). These results support recent observations of natural W isotopic variation and imply that W-isotope compositions may be useful for environmental applications of stable isotope geochemistry. JF - American Geophysical Union Fall Meeting AU - Wasserman, N L AU - Williams, R W AU - Kayzar, T M AU - Schorzman, K C AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract V23E EP - 2884 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629939876?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Investigating+tungsten+concentrations+and+isotopic+compositions+of+natural+water+samples+from+the+Carson+River+basin&rft.au=Wasserman%2C+N+L%3BWilliams%2C+R+W%3BKayzar%2C+T+M%3BSchorzman%2C+K+C%3BAnonymous&rft.aulast=Wasserman&rft.aufirst=N&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Structure determination of plutonium oxide precipitates formed from aqueous plutonium IV and V solutions and in the presence of goethite AN - 1629938842; 2014-095838 AB - A series of aqueous Pu(IV) and Pu(V) batch sorption experiments with goethite (alpha -FeOOH) in a pH 8+ or -0.5 buffer solution (5 mM NaCl+0.7 mM NaHCO3) at room temperature (25 degrees C) were performed. Intrinsic Pu colloids were synthesized in alkaline solution (pH 8, 25 degrees C) and acidic solution (0.1 M HNO3, approximately 80 degrees C for 10-20 min), respectively, for comparison. Morphology, distribution and crystal structure of Pu oxide precipitates, as well as interaction between the Pu precipitates and goethite, were investigated using transmission electron microscopy (TEM). The Pu oxide precipitates formed from the sorption experiments consist of 3-5 nm primary crystalline particles (nanocrystals) irrespective of the initial form of Pu. The Pu oxide nanocrystals adopt two different crystal structures, either fcc PuO2 or bcc Pu4O7. The relative abundance of one form over the other depends on the initial form of Pu, Pu concentration, and the presence of goethite. For the high Pu concentration sorption cases (>9,000 nmol/m2 goethite), fcc PuO2 is the predominant phase occurring in both aqueous Pu(IV) and Pu(V) samples. In the Pu(IV) samples, the fcc PuO2 nanocrystals form mainly as a product of hydrolysis in solution. In the Pu(V) samples, the fcc PuO2 nanocrystals form by redox reactions dominantly occurring on goethite surface following the sorption of Pu(V). At lower Pu concentrations, the bcc Pu4O7 becomes dominant in the presence of goethite. The bcc Pu4O7 forms directly on the goethite surface as a 3-5 nm isolated nanocrystal in both Pu(IV) and Pu(V) samples and has specific crystallographic orientation relationships to goethite. Nucleation of the bcc Pu4O7 may occur by substitution of Pu(III) at the Fe(III) position on the goethite surface. In the absence of goethite, the intrinsic Pu colloids formed in alkaline solution (pH 8, 25 degrees C) are also comprised of 3-5 nm fcc PuO2 nanocrystals. As for the intrinsic Pu colloids precipitated from the acidic solution (0.1 M HNO3) at an elevated temperature, their solution exhibits the classic green color attributed to colloidal Pu(IV), but the constitutive fcc PuO2 nanocrystals are only 2-3 nm in diameter. The 2-3 nm PuO2 nanocrystals can self-assemble to form 10 nm to 100 nm Pu colloidal aggregates that produce electron diffraction patterns that are indicative of much larger well ordered "single crystals" of PuO2. JF - American Geophysical Union Fall Meeting AU - Dai, Z AU - Zavarin, M AU - Zhao, P AU - Begg, J AU - Kersting, A B AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H13E EP - 1411 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629938842?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Structure+determination+of+plutonium+oxide+precipitates+formed+from+aqueous+plutonium+IV+and+V+solutions+and+in+the+presence+of+goethite&rft.au=Dai%2C+Z%3BZavarin%2C+M%3BZhao%2C+P%3BBegg%2C+J%3BKersting%2C+A+B%3BAnonymous&rft.aulast=Dai&rft.aufirst=Z&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H13E/abstracts/H13E-1411.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - A rapid, low-cost method to determine travel times at managed aquifer recharge operations using noble gas tracers AN - 1629938138; 2014-095801 AB - Managed aquifer recharge is a key component for the sustainable use of surface water and groundwater in the arid western U.S. When recycled water is a recharge water source, subsurface residence time, required for bacteria and virus deactivation, is best verified by application of an extrinsic tracer. Desirable tracer properties include: no real or perceived health risk, inexpensive even for a large volume of tagged water, large dynamic range, efficient introduction, convenient sampling methods, and rapid, low-cost analysis. We have developed and tested a dissolved noble gas tracer technique ideally suited for tracing large water volumes at managed aquifer recharge facilities. In an application of the method at a water district's facilities in the San Francisco Bay area, Xenon was introduced into a 10 (super 6) m (super 3) pond over a period of 7 days using a 300 m length of gas-permeable silicone tubing. Samples from the pond, near-field shallow monitoring wells, and production wells about 400 m from the recharge pond were analyzed for dissolved Xe by noble gas membrane inlet mass spectrometry (NGMIMS). The NGMIMS uses a syringe pump, gas-permeable membrane inlet, and quadrupole residual gas analyzer for measurement of noble gas concentrations. Samples are collected in VOA vials, and analysis can be carried out in real-time, with a measurement uncertainty of about 5% for Xe. Tracer first appeared in a production well 136 days after starting the tracer introduction at 0.7% (C/C (sub 0) ) of the peak pond xenon concentration. The cost of the tracer is about US650/10 (super 6) m (super 3) water, and the NGMIMS was assembled with parts totaling approximately US$50,000, making application of the tracer method feasible for most managed aquifer recharge projects. This project is part of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program. JF - American Geophysical Union Fall Meeting AU - Moran, Jean E AU - Visser, A AU - Singleton, M J AU - Esser, B K AU - Halliwell, Mikel AU - Hillegonds, D J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H13C EP - 1347 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629938138?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+rapid%2C+low-cost+method+to+determine+travel+times+at+managed+aquifer+recharge+operations+using+noble+gas+tracers&rft.au=Moran%2C+Jean+E%3BVisser%2C+A%3BSingleton%2C+M+J%3BEsser%2C+B+K%3BHalliwell%2C+Mikel%3BHillegonds%2C+D+J%3BAnonymous&rft.aulast=Moran&rft.aufirst=Jean&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H13C/abstracts/H13C-1347.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Combined use of absolute and differential seismic arrival time data to improve absolute event location AN - 1623276717; 2014-088142 AB - Arrival time measurements based on waveform cross correlation are becoming more common as advanced signal processing methods are applied to seismic data archives and real-time data streams. Waveform correlation can precisely measure the time difference between the arrival of two phases, and differential time data can be used to constrain relative location of events. Absolute locations are needed for many applications, which generally requires the use of absolute time data. Current methods for measuring absolute time data are approximately two orders of magnitude less precise than differential time measurements. To exploit the strengths of both absolute and differential time data, we extend our multiple-event location method Bayesloc, which previously used absolute time data only, to include the use of differential time measurements that are based on waveform cross correlation. Fundamentally, Bayesloc is a formulation of the joint probability over all parameters comprising the multiple event location system. The Markov-Chain Monte Carlo method is used to sample from the joint probability distribution given arrival data sets. The differential time component of Bayesloc includes scaling a stochastic estimate of differential time measurement precision based the waveform correlation coefficient for each datum. For a regional-distance synthetic data set with absolute and differential time measurement error of 0.25 seconds and 0.01 second, respectively, epicenter location accuracy is improved from and average of 1.05 km when solely absolute time data are used to 0.28 km when absolute and differential time data are used jointly (73% improvement). The improvement in absolute location accuracy is the result of conditionally limiting absolute location probability regions based on the precise relative position with respect to neighboring events. Bayesloc estimates of data precision are found to be accurate for the synthetic test, with absolute and differential time measurement error estimated to be 0.28 seconds and 0.01 seconds, respectively. We will report on the use of absolute and differential time data for several real data sets at the meeting. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-570920. JF - American Geophysical Union Fall Meeting AU - Myers, S AU - Johannesson, G AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S42C EP - 05 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623276717?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Combined+use+of+absolute+and+differential+seismic+arrival+time+data+to+improve+absolute+event+location&rft.au=Myers%2C+S%3BJohannesson%2C+G%3BAnonymous&rft.aulast=Myers&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-11-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - Analysis of the influence of salinity on Mg/Ca ratios of cultured and coretop planktic foraminifers AN - 1623264795; 2014-087677 AB - The Mg/Ca ratio in foraminiferal calcite is one of the most prominent proxies for paleoceanographic temperature reconstructions but recent coretop sediment observations have raised concerns that salinity may exert a significant (27% increase per salinity unit) secondary control on planktic foraminifers. Because multiple environmental variables can change simultaneously in the ocean, we have performed laboratory culture experiments with the planktic foraminifers Orbulina universa, Globigerinoides sacculifer and Globigerinoides ruber, where salinity was the only variable. In these experiments we find a Mg/Ca-sensitivity to salinity of less than 5% in all three species and thus conclude that the stronger effect observed in marine sediments cannot be thermodynamic. Rather, we hypothesize that the Mg/Ca and delta 18O variations observed in Atlantic coretop sediments are likely due to either another environmental parameter or ecophysiological response that covaries with salinity. We evaluate the dissolution correction commonly applied to Mg/Ca-temperature estimates, and analyze the proxy records in the light of seasonal and vertical physico-chemical distribution patterns in the surface ocean. JF - American Geophysical Union Fall Meeting AU - Hoenisch, B AU - Allen, K A AU - Eggins, Stephen M AU - Spero, H J AU - Lea, D W AU - Russell, A D AU - Rosenthal, Y AU - Yu, Jimin AU - Elderfield, H AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B21C EP - 0356 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623264795?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+the+influence+of+salinity+on+Mg%2FCa+ratios+of+cultured+and+coretop+planktic+foraminifers&rft.au=Hoenisch%2C+B%3BAllen%2C+K+A%3BEggins%2C+Stephen+M%3BSpero%2C+H+J%3BLea%2C+D+W%3BRussell%2C+A+D%3BRosenthal%2C+Y%3BYu%2C+Jimin%3BElderfield%2C+H%3BAnonymous&rft.aulast=Hoenisch&rft.aufirst=B&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-11-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - In situ TEM investigations of mineral growth through oriented attachment of nanoparticles AN - 1623263656; 2014-087758 AB - The growth of crystals through aggregation and coalescence of nanoparticles is now recognized as a widespread phenomenon in biomineral, biomimetic and natural systems, and during synthetic production of nanoparticles and nanowires. The resulting crystals often exhibit complex forms ranging from quasi-one-dimensional chains to 3D hierarchical and self-similar superstructures. Yet the final structure typically diffracts as a single crystal, implying that the primary particles aligned during growth. When coalignment is accompanied by coalescence, this growth process is often referred to as oriented attachment (OA). OA is now recognized as an important mechanism of crystal growth in many materials in the environment. However, the pathway by which OA occurs has not been established. Although the preservation of primary particle morphology and formation of twins and stacking faults at particle-particle boundaries strongly suggest a sequence of whole particle alignment followed by interface elimination, atom-by-atom reorientation via dislocation and grain-boundary migration after attachment are another potential mechanism. If indeed the primary particles align before attachment, the dynamics of that process and the forces that drive it have yet to be revealed. To achieve this understanding we are investigating crystal nucleation and oriented attachment in a number of systems, such as iron oxides and oxyhydroxide as well as titanium dioxide, through in situ and ex situ TEM. We performed high-resolution TEM using a fluid cell to directly observe oriented attachment of iron oxyhydroxide nanoparticles. The particles undergo continuous rotation and interaction until they find a perfect lattice match. A sudden jump to contact then occurs over less than 1 nanometer, followed by lateral atom-by-atom addition initiated at the contact point. Interface elimination proceeds at a rate consistent with the curvature dependence of the Gibbs free energy. Measured translational and rotational accelerations show that strong, highly direction-specific interactions drive crystal growth via oriented attachment. Analysis of the acceleration leading to attachment indicates that it is driven by electrostatic interactions. The results on iron oxide nanoparticles show a progression of nanorod aggregation into disordered aggregates followed by gradual ordering into the final co-aligned mesocrystal, while analysis of the titanium oxide system through ex situ TEM analysis indicates a highly organized aggregation and branching process. We detail the progression of the structural transformations and use quantitative analysis of the dynamics to constrain the underlying mechanisms. JF - American Geophysical Union Fall Meeting AU - Li, D AU - Nielsen, M AU - Lee, J R AU - Frandsen, C AU - Banfield, J F AU - Kisailus, D AU - de Yoreo, J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B51I EP - 08 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 01A:General mineralogy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623263656?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+TEM+investigations+of+mineral+growth+through+oriented+attachment+of+nanoparticles&rft.au=Li%2C+D%3BNielsen%2C+M%3BLee%2C+J+R%3BFrandsen%2C+C%3BBanfield%2C+J+F%3BKisailus%2C+D%3Bde+Yoreo%2C+J%3BAnonymous&rft.aulast=Li&rft.aufirst=D&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-11-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - The effect of light on intrashell trace metal variability (Mg/Ca and Sr/Ca) in the planktic foraminifer Orbulina universa AN - 1623259885; 2014-087676 AB - The shell walls of many planktic foraminifers contain alternating bands of high and low Mg/Ca calcite. These bands have been attributed to chamber formation, light-modulated (circadian-like) biological effects, and light (e.g. pH change in the calcifying environment driven by the photosynthesis/respiration of photosynthetic symbionts). Previous experiments on the living planktic foraminifer Orbulina universa confirm a diurnal nature in the banding of O. universa: a wide band of low-Mg calcite forms during the day (12-hour light) and a narrower band of high Mg calcite forms at night (12-hour dark) (Spero et al., in prep). During the summer of 2011, we explored the response of Mg banding to light by culturing foraminifera at constant temperature, salinity, and ambient seawater pH, but with different light schedules: reverse light cycles (day/night cycle shifted by 12 hours), constant (24-hour) light, and constant (24-hour) dark conditions. We used an artificial Ba spike to mark 12-hour intervals of growth, regardless of the imposed light regime. In specimens grown with a reversed day/night light/dark cycle, we observe an immediate shift in the timing of Mg/Ca banding. The timing of high and low Mg/Ca bands in these specimens is indistinguishable from specimens grown under a normal day/night light/dark cycle. Mg/Ca bands are present in some of the specimens cultured in constant light and in all specimens grown in constant dark conditions. Banding in the constant light and constant dark specimens is not paced by a diurnal cycle. The amplitude of the banding in these specimens is diminished and the average Mg/Ca ratios are 30% lower in comparison to those kept on a 12-hour light/dark cycle. Additionally, we find the Sr/Ca ratios are similar in both the constant light and reverse light/dark specimens, but are statistically significantly lower in the constant dark specimens (8% lower, p-value <<0.05). These results indicate that changes in microenvironment pH due to symbiont photosynthesis are not pacing Mg/Ca banding in Orbulina universa, although photosymbiont/pH activity could modify Mg/Ca band amplitude. The presence of Mg/Ca banding in some specimens of both the constant light and constant dark experiments are consistent with a light-modulated biological mechanism that is disrupted by the absence of a day/night cycle and is no longer paced by a 24-hour cycle. JF - American Geophysical Union Fall Meeting AU - Fehrenbacher, J S AU - Spero, H J AU - Russell, A D AU - Gagnon, A C AU - Vetter, L AU - Snyder, J AU - Naumann, E AU - Grimm, B L AU - Holland, Kate AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B21C EP - 0355 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623259885?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+effect+of+light+on+intrashell+trace+metal+variability+%28Mg%2FCa+and+Sr%2FCa%29+in+the+planktic+foraminifer+Orbulina+universa&rft.au=Fehrenbacher%2C+J+S%3BSpero%2C+H+J%3BRussell%2C+A+D%3BGagnon%2C+A+C%3BVetter%2C+L%3BSnyder%2C+J%3BNaumann%2C+E%3BGrimm%2C+B+L%3BHolland%2C+Kate%3BAnonymous&rft.aulast=Fehrenbacher&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-11-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - The thermodynamics of calcite nucleation on organic surfaces; classical vs. non-classical pathways AN - 1623258147; 2014-087774 AB - Nucleation in the natural world often occurs at organic surfaces. During biomineralization, living organisms use macromolecular matrices to direct nucleation of a variety of inorganic materials by controlling the timing, polymorphism, morphology, and crystallographic orientation of mineral nuclei. In geochemical settings, mineral surfaces, which are often covered with organic layers or biofilms, surround the volume within which nucleation occurs. Despite the importance of nucleation phenomena in these natural settings, our understanding of the reaction dynamics and energetics of the process is limited. Issues such as the role of pre-nucleation clusters, formation of amorphous precursors, and polymorph selection during the initial stages of nucleation, as well as the structural relationships between the organic matrix and the emerging nucleus are poorly understood. Using self-assembled monolayers (SAMs) of alkanethiols as simple models for macromolecular matrices and organic films, we address the gaps in our understanding by employing a suite of in situ methods to investigate CaCO (sub 3) nucleation. From optical measurements of calcite nucleation rates on alkanethiol SAMs, we find that for two carboxyl-terminated alkanethiol SAMs with odd (mercaptoundecanoic acid) and even (mercaptohexadecanoic acid) carbon chains, the rate exhibits the supersaturation dependence expected from classical theory and the effective interfacial energy is reduced from about 109 mJ/m (super 2) in bulk solution to 81 mJ/m (super 2) and 72 mJ/m (super 2) , respectively. Theoretical analysis shows that the corresponding free energy barrier is reduced from 105kT for homogeneous nucleation in bulk solution to 27KT and 19kT, respectively. The results demonstrate that calcite nucleation on these carboxyl SAMs is described well in purely classical terms through a reduction in the thermodynamic barrier due to decreased interfacial free energy. In addition, although amorphous particles form prior to crystal nucleation on hydroxyl SAMs and during crystal nucleation on carboxyl SAMs -- even well below the accepted bulk solubility limit for amorphous calcium carbonate (ACC) -- they do not grow and are not precursors to the crystalline phase. Instead, calcite nucleates independently. These results call into question the emerging view of calcite nucleation as a non-classical process. Finally we show how questions concerning formation pathways and energetic controls of templated nucleation can be investigated with in situ transmission electron microscopy (TEM) at nanometer scale and video rates. This capability is enabled by the combination of a custom designed TEM stage and fluid cell. Significantly, the design of the cell and holder ensures temperature and electrochemical control over the reaction environment, allowing for direct investigation of nucleation dynamics. JF - American Geophysical Union Fall Meeting AU - Nielsen, M AU - Hu, Q AU - Hamm, L M AU - Lee, J R AU - Becker, U AU - Dove, P M AU - de Yoreo, J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B53D EP - 0700 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623258147?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+thermodynamics+of+calcite+nucleation+on+organic+surfaces%3B+classical+vs.+non-classical+pathways&rft.au=Nielsen%2C+M%3BHu%2C+Q%3BHamm%2C+L+M%3BLee%2C+J+R%3BBecker%2C+U%3BDove%2C+P+M%3Bde+Yoreo%2C+J%3BAnonymous&rft.aulast=Nielsen&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-11-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - Quantifying solid deformation in wellbore cement with particle-image-velocimetry and X-Ray tomography AN - 1618134950; 2014-085927 AB - Particle Image Velocimetry (PIV) is a technique that has been widely employed to study velocity fields in complex fluid flows. In this paper, we describe how PIV methods can be applied to high-resolution X-Ray Computed Tomography (XRCT) of solid samples. Unlike traditional PIV techniques for fluids, the XRCT-PIV method does not rely on introduced tracer particles, but rather uses in-situ sample heterogeneities. As such, the technique provides a non-destructive, non-invasive method for tracking sample deformation. In addition, the use of XRCT allows three dimensional volumes to be compared, rather than the two dimensional images used in traditional PIV. This adds to the robustness of the method, allowing accurate displacements to be obtained despite measurement artifacts or changes in sample mineralogy. In this presentation we demonstrate the use of XRCT-PIV on tomographic images from a study of wellbore-cement integrity in which the cement samples undergo a series of reactions following exposure to carbon-dioxide rich brine. The XRCT-PIV method is used to reveal the deformation that occurs as a result of the mechanical changes in the cement surface. We also verify the precision and robustness of the technique in the presence of noise with tests conducted on numerically-generated virtual samples. The results from both the cement samples and numerical tests reveal that accurate displacement measurements are obtained despite chemical alteration and instrument artifacts. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Walsh, S D AU - Carroll, S AU - Du Frane, W L AU - Mason, H E AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR43A EP - 2301 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618134950?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Quantifying+solid+deformation+in+wellbore+cement+with+particle-image-velocimetry+and+X-Ray+tomography&rft.au=Walsh%2C+S+D%3BCarroll%2C+S%3BDu+Frane%2C+W+L%3BMason%2C+H+E%3BAnonymous&rft.aulast=Walsh&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Spectromicroscopy to explore scale transitions in two topsoil horizons AN - 1618134720; 2014-083614 AB - Mechanistic knowledge of soil processes is ever increasing, yet the fundamental challenge remains to trace functions and processes across scales. In this contribution we explore the potential of spectromicroscopic imaging at both millimeter and nanometer scales to support hypotheses about mineral and organic phase transformations in a forest soil (Inceptisol, HJ Andrews, OR) and in an arable grassland soil (Mollisol, CBARC, Pendleton, OR). Soils were physically separated into free organic matter, aggregated organic matter and a mineral fraction. Fractions were subjected to FTIR microscopy at the millimeter scale and Synchrotron spectromicroscopy at the nanometer scale to obtain information on how the association of carbon and metal species with soil phases varies as a function of scale. Numerical techniques of image analyses were applied to enable quantitative inference. First results indicate that scale transitions in different soils are not necessarily governed by the same rule sets. JF - American Geophysical Union Fall Meeting AU - Chacon, S S AU - Keiluweit, M AU - Kleber, M AU - Pett-Ridge, J AU - Nico, P S AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B31E EP - 0477 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618134720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Spectromicroscopy+to+explore+scale+transitions+in+two+topsoil+horizons&rft.au=Chacon%2C+S+S%3BKeiluweit%2C+M%3BKleber%2C+M%3BPett-Ridge%2C+J%3BNico%2C+P+S%3BAnonymous&rft.aulast=Chacon&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Patterns of volcanism, weathering, and climate history from high-resolution geochemistry of the BINGO core, Mono Lake, California, USA AN - 1612267231; 2014-081752 AB - Mono Lake, California is a closed-basin lake on the east side of the Sierra Nevada, and inflow from snowmelt dominates the modern hydrology. Changes in wetness during the last glacial period (>12,000 years ago) and over the last 2,000 years have been extensively described, but are poorly known for the intervening period. We have recovered a 6.25 m-long core from approximately 3 m of water in the western embayment of Mono Lake, which is shown by initial radiocarbon dates to cover at least the last 10,000 years. The sediments of the core are variable, ranging from black to gray silts near the base, laminated olive-green silt through the center, to layers of peach-colored carbonate nodules interbedded with gray and olive silts and pea-green organic ooze. Volcanic tephras from 10,000 calibrated years before present (cal yr BP) higher in the core, and significant disruption of the fine layers, this interval likely indicates a relatively deep lake persisting into the early Holocene, after the initial dramatic regression from late Pleistocene levels. The finely laminated olive-green silt of the period approximately 10,700 to approximately 7500 cal yr BP is very homogenous chemically, probably indicating a stable, stratified lake and a relatively wet climate. This section merits mm-scale scanning and petrographic examination in the future. The upper boundary of the laminated section shows rising Ca/K and decreasing Ti and Si/K, marking the appearance of authigenic carbonate layers. After approximately 7500 cal yr BP, the sediment in BINGO becomes highly variable, with increased occurrence of tephra layers and carbonate, indicating a lower and more variable lake level. A short interval of olive-green, laminated fine sand/silt just above a radiocarbon date of 3870+ or -360 cal yr BP may record the Dechambeau Ranch highstand of Stine (1990; PPP v. 78 pp 333-381), and is marked by a distinct low in Ca/K, lasting approximately 1000 years. The low terminates in a dramatic rise in Ca/K to some of the highest levels in the core, suggesting a period of approximately 1000 years of extremely dry climate, dwarfing all of the variability in Ca/K, and likely lake level, over the last 2000 years. JF - American Geophysical Union Fall Meeting AU - Zimmerman, S R AU - Starratt, S AU - Hemming, Sidney R AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract PP11A EP - 1993 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612267231?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Patterns+of+volcanism%2C+weathering%2C+and+climate+history+from+high-resolution+geochemistry+of+the+BINGO+core%2C+Mono+Lake%2C+California%2C+USA&rft.au=Zimmerman%2C+S+R%3BStarratt%2C+S%3BHemming%2C+Sidney+R%3BAnonymous&rft.aulast=Zimmerman&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - LITHO1.0; an updated crust and lithospheric model of the Earth developed using multiple data constraints AN - 1612265407; 2014-081953 AB - Models such as CRUST2.0 (Bassin et al., 2000) have proven very useful to many seismic studies on regional, continental, and global scales. We have developed an updated, higher resolution model called LITHO1.0 that extends deeper to include the lithospheric lid, and includes mantle anisotropy, potentially making it more useful for a wider variety of applications. The model is evolving away from the crustal types strongly used in CRUST5.1 (Mooney et al., 1998) to a more data-driven model. This is accomplished by performing a targeted grid search with multiple data inputs. We seek to find the most plausible model which is able to fit multiple constraints, including updated sediment and crustal thickness models, upper mantle velocities derived from travel times, and surface wave dispersion. The latter comes from a new, very large, global surface wave dataset built using a new, efficient measurement technique that employs cluster analysis (Ma et al., 2012), and includes the group and phase velocities of both Love and Rayleigh waves. We will discuss datasets and methodology, highlight significant features of the model, and provide detailed information on the availability of the model in various formats. JF - American Geophysical Union Fall Meeting AU - Pasyanos, M E AU - Masters, G AU - Laske, G AU - Ma, Z AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract T11D EP - 09 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612265407?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=LITHO1.0%3B+an+updated+crust+and+lithospheric+model+of+the+Earth+developed+using+multiple+data+constraints&rft.au=Pasyanos%2C+M+E%3BMasters%2C+G%3BLaske%2C+G%3BMa%2C+Z%3BAnonymous&rft.aulast=Pasyanos&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Lg waves attenuation studies over the Iranian Plateau and Zagros AN - 1612263317; 2014-080485 AB - Waveforms from regional events collected over the last 15 years by the permanent seismological networks and temporary deployments deployed within the Iranian plateau provide a unique and unprecedented opportunity to investigate the crustal and mantle attenuation characteristics by analysis of the regional phases including Lg and Pg waves. We have investigated the crustal attenuation using Lg waveforms available from 305 stations consisting of 101 permanent and 204 temporary stations. This study is performed within the framework of a larger project aimed at developing high-resolution seismic attenuation models for the Iranian Plateau and the Zagros Mountains using different data and approaches. We have combined the Iranian data set with data from numerous networks across Turkey, Georgia, Azerbaijan, Syria, Jordan, and Saudi Arabia. This combination provides us with waveforms from over 550 stations spanning most of the Northern Middle East. Simultaneous inversion of the Lg Q values calculated using two-station paths gives us a model of Lg Q that extends from the western Anatolian Plate to the eastern edge of the Iranian Plateau. Prior studies have suggested strong complexity in the crustal and uppermost mantle attenuation structure beneath much of the Iranian Plateau and the surrounding regions. Lg waves propagating over different paths in this region show strong variations in amplitude and frequency content due to this very complex structure. We have created a frequency dependent Lg Q model that covers most of the Iranian Plateau using instrument corrected two station method that eliminates the contributions from the source. Our model maps Lg Q around 200 for most part of the central Iranian Plateau and Alborz Mountains whereas it is lower than 150 for the western Anatolian Plateau. Relatively high Q values (>300) are observed in the Zagros Belt that abruptly changes across the Zagros suture. We have also found unexpected results, including a high Q zone that surrounds the Caspian Sea. We argue that it originates from energy that is bending around the south Caspian Sea oceanic crust as well as efficient Lg propagation through the Alborz Mountain crust. JF - American Geophysical Union Fall Meeting AU - Kaviani, A AU - Sandvol, E A AU - Rumpker, G AU - Ku, W AU - Gok, R AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S41A EP - 2388 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612263317?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Lg+waves+attenuation+studies+over+the+Iranian+Plateau+and+Zagros&rft.au=Kaviani%2C+A%3BSandvol%2C+E+A%3BRumpker%2C+G%3BKu%2C+W%3BGok%2C+R%3BAnonymous&rft.aulast=Kaviani&rft.aufirst=A&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Simulation of the effects of elevated pore pressure on seismicity AN - 1612263203; 2014-080409 AB - Risks associated with induced seismicity are a significant factor in the design, permitting and operation of stimulation and other fluid injection operations, especially enhanced geothermal, geological CO2 sequestration and wastewater disposal. Conventional risk assessment for such operations usually neglects treatment of site-specific conditions, such as in situ stress, pore pressure evolution, and the mechanical and hydrologic properties of the reservoir. As one component of a physics-based probabilistic seismic hazard approach designed to address these issues, we discuss the development of an induced earthquake simulation method that represents hydromechanical effects explicitly. This capability is developed within the GEOS framework [Settgast and Johnson, 37th Stanford Geothermal Workshop, 2012], and is based on the earthquake simulation code RSQSim [Dieterich and Richards-Dinger, PAGEOP, 2010]. The GEOS implementation augments RSQSim by coupling an evolving pore pressure distribution into the fault response via multi-phase flow simulations of fluid injection and plume migration over relevant time scales. The present implementation is uni-directional (effective stress effects) with no feedback to the permeability response. The application allows for the use of realistic fault geometries and fractal spatial distributions of constitutive properties generated along two-dimensional fault surfaces. Constant strain rate boundary conditions are applied to mimic regional tectonic loading. RSQSim uses a rate- and state-dependent friction law to evolve the stresses along the fault. In general, significant uncertainties remain in the scaling of empirically determined constitutive parameters from laboratory to field scale, particularly at the shallow crustal depths characteristic of injection-induced seismicity. In order to understand the sensitivity of the simulations to these parameters, we have sampled multiple model realizations using Livermore's PSUADE code [Tong, 2011]. We will discuss the implications of these simulations not only on the sensitivity of such models but also on the construction of reduced order models for characterizing site-specific induced seismicity. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Foxall, W AU - Johnson, S AU - Hutchings, L J AU - Richards-Dinger, K B AU - Dieterich, J H AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S33C EP - 01 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612263203?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Simulation+of+the+effects+of+elevated+pore+pressure+on+seismicity&rft.au=Foxall%2C+W%3BJohnson%2C+S%3BHutchings%2C+L+J%3BRichards-Dinger%2C+K+B%3BDieterich%2C+J+H%3BAnonymous&rft.aulast=Foxall&rft.aufirst=W&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Crosswell seismic imaging of CO (sub 2) sequestration at the Frio Pilot based on spectral-element and adjoint methods AN - 1612263156; 2014-080452 AB - We aim to improve reservoir monitoring at the Frio Pilot CO2 sequestration site near Houston, Texas, using spectral-element and adjoint methods. Seismic crosswell surveys were acquired to monitor a small scale CO2 injection conducted in a brine aquifer of the Frio Formation. The CO2 was monitored between two boreholes (the new injection well and a pre-existing well used for monitoring). These wells are 30 m apart. The CO2 injection took place over 10 days in October 2004 with about 1,600 tons of supercritical CO2 injected into the upper C-sand of the Frio Formation at a depth of 1,528.5-1,534.7 m. The monitoring survey uses regularly spaced sources and receivers every 1.5 m, spanning 75 m and 300 m, respectively. Conventional crosswell seismic monitoring focuses on P wave travel times only because (1) it is difficult to record high energy S waves in a crosswell survey and (2) accurately modeling the full waveform can be challenging. However, the crosswell survey at Frio, Texas, provides an excellent dataset with both P and S waves generated by an orbital vibrator source generating two orthogonal polarizations. Therefore, using both P and S waves to invert for the seismic velocity variation caused by CO2 injection becomes possible and constitutes a relatively new approach. We implement this 4D seismic imaging project in two main steps. First, using the available pre-injection dataset we improve the 1D velocity model obtained from sonic log based on an adjoint method. Then we use the same approach to image the CO2, that is, update the pre-injection 2D velocity model from the first step to represent the post-injection 2D velocity model. Synthetic seismograms are calculated using a spectral-element method. Adjoint tomography is performed based on the calculation of finite-frequency sensitivity kernels using travel-time misfits between data and synthetics. Prepared by LLNL under Contract DE-AC52-07NA27344. LLNL-ABS-567393. JF - American Geophysical Union Fall Meeting AU - Wang, J AU - Morency, C AU - Daley, T M AU - Cummins, P R AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S41A EP - 2355 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612263156?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Crosswell+seismic+imaging+of+CO+%28sub+2%29+sequestration+at+the+Frio+Pilot+based+on+spectral-element+and+adjoint+methods&rft.au=Wang%2C+J%3BMorency%2C+C%3BDaley%2C+T+M%3BCummins%2C+P+R%3BAnonymous&rft.aulast=Wang&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Centennial scale variations in lake productivity linked to solar activity AN - 1566816567; 2014-077796 AB - Solar variations on both decadal and centennial timescales have been associated with climate phenomena (van Loon et al., 2004; Hodell et al., 2001; White et al., 1997). The energy received by the Earth at the peak of the solar cycle increases by <0.1%; so the question has remained of how this could be amplified to produce an observable climate response. Recent modeling shows that the response of the Earth's climate system to the 11-year solar cycle may be amplified through stratosphere and ocean feedbacks and has the potential to impact climate variability on a multidecadal to centennial timescales (Meehl et al., 2009). Here, we report a 1000-year record of changes in the stratigraphy and carbon isotope composition of varved lake sediment from Isla Isabela (22 degrees N, 106 degrees W) in the subtropical northeast Pacific. Stable carbon isotopes and carbonate stratigraphy can be used to infer surface productivity in the lake. Our analysis shows variations in primary productivity on centennial timescales and suggests that solar activity may be an important component of Pacific climate variability. A possible response during solar maxima acts to keep the eastern equatorial Pacific cooler and drier than usual, producing conditions similar to a La Nina event. In the region around Isla Isabela peak solar years were characterized by decreased surface temperatures and suppressed precipitation (Meehl et al., 2009), which enhance productivity at Isabela (Kienel et al. 2011). In the future, we plan to analyze the data using advanced time series analysis techniques like the wavelets together with techniques to handle irregularly spaced time series data. JF - American Geophysical Union Fall Meeting AU - Englebrecht, A AU - Bhattacharyya, S AU - Guilderson, T P AU - Ingram, L AU - Byrne, R AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract PP33A EP - 2109 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566816567?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Centennial+scale+variations+in+lake+productivity+linked+to+solar+activity&rft.au=Englebrecht%2C+A%3BBhattacharyya%2C+S%3BGuilderson%2C+T+P%3BIngram%2C+L%3BByrne%2C+R%3BAnonymous&rft.aulast=Englebrecht&rft.aufirst=A&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Coda magnitudes of small events in Iran and surrounding regions AN - 1566816483; 2014-077945 AB - Seismic coda envelope techniques provide a means of determining accurate moment magnitudes for earthquakes that are too small to easily be fit using waveform modeling techniques. Using the dense coverage of the Iranian broadband stations, we calculated the moment magnitudes of small events (mb > 3.5) using coda calibrated envelopes. 17 broad-band stations equipped with CMG-3T sensors recorded more than 6000 regional events. This data provided excellent coverage to improve coda peak, shape and path parameters in the region. First, we analyzed coda envelopes for 13 narrow frequency bands to estimate coda shapes and peak velocities. This addresses the regional variation of wave propagation. In particular, there are large differences between the high frequency envelopes for the events recorded from Pakistan, Caspian Sea and Arabian Platform. Accounting for this allows us to extend our capabilities to smaller magnitudes and higher frequencies. To enhance the data quality, we strictly examined the envelopes for any spikes, aftershocks or peculiar onsets. Second, we obtained coda amplitudes at each calibrated region and merged with other data in the region. The new data set provided coverage to map out 2-D path effects, which decrease the magnitude variance of the estimates from different stations dramatically. We aim to analyze smaller events (down to mb=3.0) as we improve our measurements at each step. This data will also provide a source for 2-D coda-shape and coda-peak parameter calculation where the improved coda amplitudes will be measured. We compare coda magnitudes with waveform modeled Mw's where we find very good agreement for larger magnitude events (Mw > 4.5). JF - American Geophysical Union Fall Meeting AU - Gok, R AU - Alexanian, A AU - Kaviani, A AU - Sandvol, E A AU - Pasyanos, M E AU - Matzel, E AU - Walter, W R AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S44C EP - 08 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566816483?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Coda+magnitudes+of+small+events+in+Iran+and+surrounding+regions&rft.au=Gok%2C+R%3BAlexanian%2C+A%3BKaviani%2C+A%3BSandvol%2C+E+A%3BPasyanos%2C+M+E%3BMatzel%2C+E%3BWalter%2C+W+R%3BAnonymous&rft.aulast=Gok&rft.aufirst=R&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Reducing seismic hazard and building capacity through international cooperation AN - 1566816457; 2014-077916 AB - During the last 50 years, the Caucasus, Central Asia and the Caspian Sea regions have experienced several devastating earthquakes. While each country in the region has worked with its neighbors on small, ad-hoc projects to improve preparedness, deeply ingrained political and ethnic rivalries, and severely stressed economies have severely hindered sustained regional cooperation. Future damaging earthquakes are inevitable and without proper planning the negative impact on public safety, security, economics and stability in these regions will be devastating. We have, through twelve years of international scientific cooperation, focused on the development of an expanded skill base and infrastructure, through the installation of new, modern, digital seismic monitoring networks, building of historic databases, sharing seismic, geologic and geophysical data, conducting joint scientific investigations utilizing the new digital data and applying modern techniques, as well as the development of regional hazard models that the scientists of the region share with their governments and use to advise them on the best ways to mitigate the impact of a damaging earthquake. We have established specialized regional scientific task-force teams who can carry out seismological, geological and engineering studies in the epicentral zone, including the collection of new scientific data, for better understanding of seismic and geodynamic processes as well to provide emergency support in crisis and post-crisis situations in the Southern Caucasus countries. "Secrecy" in crisis and post-crisis situations in the former Soviet Union countries, as well as political instabilities, led to an absence of seismic risk reduction and prevention measures as well as little to no training of scientific-technical personnel who could take action in emergency situations. There were few opportunities for the development of a next generation of scientific experts, thus we have placed emphasis on the inclusion and development of young scientists who are able to advise their countries' decision makers in the future. By building a common and shared set of databases, making available new modern, scientific tools, and providing joint training field exercises we are working to enable the countries to make independent decisions about their infrastructures and to pool their resources in the event of another earthquake. Out of the earthquakes' devastation has come a positive outcome: a scientific partnership to address the seismic hazards along one of the world's most tectonically active regions. This is contributing to a rapprochement of the scientists, decision makers, and politicians in this region. This work was supported through the following international projects: ISTC A-1418 Project "Open Network of Scientific Centers for Mitigation Risk of Natural Hazards in the Southern Caucasus and Central Asia", ISTC CSP-053 Project "Development of Communication System for Seismic Hazard Situations in the Southern Caucasus and Central Asia", and NATO SfP-983284 Project "Caucasus Seismic Emergency Response", with participants from the Southern Caucasus countries, the US, Greece, Turkey, and France. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory in part under Contract W-7405-Eng-48 and in part under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Vergino, E S AU - Arakelyan, A AU - Babayan, H AU - Durgaryan, R AU - Elashvili, M AU - Godoladze, T AU - Javakhishvili, Z AU - Kalogeras, I AU - Melkonyan, R AU - Martin, R J AU - Yetirmishli, G AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S43J EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566816457?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reducing+seismic+hazard+and+building+capacity+through+international+cooperation&rft.au=Vergino%2C+E+S%3BArakelyan%2C+A%3BBabayan%2C+H%3BDurgaryan%2C+R%3BElashvili%2C+M%3BGodoladze%2C+T%3BJavakhishvili%2C+Z%3BKalogeras%2C+I%3BMelkonyan%2C+R%3BMartin%2C+R+J%3BYetirmishli%2C+G%3BAnonymous&rft.aulast=Vergino&rft.aufirst=E&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Gulf of Alaska and California bamboo corals; Ba/Ca and Sr/Ca records AN - 1566816068; 2014-077787 AB - Deep-sea bamboo coral communities form on seamounts and along continental margins with near global distribution. Bamboo [Isididae] corals record surrounding ocean geochemistry presenting reliable proxy records of changes in seawater conditions, including productivity and nutrient content. Here we investigate bamboo coral specimens from the California margin and Gulf of Alaska (634-1288 m water depth; nearly equal 37 degrees N-48 degrees N), to provide insight into latitudinal and temporal differences in eastern Pacific Ocean climate processes. Past oceanic conditions were reconstructed in this investigation by trace element analyses (Ba/Ca, Sr/Ca) using laser ablation ICP-MS, using a 85 mu m spot size at 10 mu m/s, 4.45 J/cm2 fluence, and 10 Hz repetition rate. Two California specimens show differences in mean Ba/Ca content: 13.73 compared to 18.55 mu mol/mol, which we attribute to differences in collection depth (T1104 A10: 833 m and T1100 A04: 1288 m, respectively). Gulf of Alaska corals show a more subdued nutrient signal with lower mean Ba/Ca values of 10.56 and 10.05 mu mol/mol across a narrower depth range (ALV3803 #3: 720 m; ALV3803 #5: 634 m, respectively). This trend of increasing Ba/Ca with depth is in consensus with eastern Pacific dissolved barium and California margin bamboo coral depth transects. Sr/Ca content was uniform between four coral specimens with values ranging from 3.01 to 3.06 mmol/mol. Coral chronologies were compared against indices of climate oscillations, including El Nino Southern Oscillation and Pacific Decadal Oscillation, using time series based upon radiocarbon dating. The corals investigated here show a limited connection with El Nino Southern Oscillation; longer-term changes related Pacific Decadal Oscillation may be evidenced in this climate archive. JF - American Geophysical Union Fall Meeting AU - Sauthoff, Wilson AU - LaVigne, M AU - Hill, T M AU - Roark, E AU - Dunbar, R B AU - Guilderson, T P AU - Spero, H J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract PP33A EP - 2100 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566816068?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Gulf+of+Alaska+and+California+bamboo+corals%3B+Ba%2FCa+and+Sr%2FCa+records&rft.au=Sauthoff%2C+Wilson%3BLaVigne%2C+M%3BHill%2C+T+M%3BRoark%2C+E%3BDunbar%2C+R+B%3BGuilderson%2C+T+P%3BSpero%2C+H+J%3BAnonymous&rft.aulast=Sauthoff&rft.aufirst=Wilson&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Armenia-to-Georgia trans-boundary fault; an example of international cooperation in the Caucasus AN - 1566815984; 2014-077915 AB - Studies of a trans-boundary active fault that cuts through the border of Armenia to Georgia in the area of the Javakheti volcanic highland have been conducted since 2007. The studies have been implemented based on the ISTC 1418 and NATO SfP 983284 Projects. The Javakheti Fault is oriented to the north-northwest and consists of individual segments displaying clear left-stepping trend. Fault mechanism is represented by right-lateral strike-slip with normal-fault component. The fault formed distinct scarps, deforming young volcanic and glacial sediments. The maximum-size displacements are recorded in the central part of the fault and range up to 150-200 m by normal fault and 700-900 m by right-lateral strike-slip fault. On both flanks, fault scarps have younger appearance, and displacement size there decreases to tens of meters. Fault length is 80 km, suggesting that maximum fault magnitude is estimated at 7.3 according to the Wells and Coppersmith (1994) relation. Many minor earthquakes and a few stronger events (1088, Mw=6.4, 1899 Mw=6.4, 1912, Mw=6.4 and 1925, Mw=5.6) are associated with the fault. In 2011/2012, we conducted paleoseismological and archeoseismological studies of the fault. By two paleoseismological trenches were excavated in the central part of the fault, and on its northern and southern flanks. The trenches enabled recording at least three strong ancient earthquakes. Presently, results of radiocarbon age estimations of those events are expected. The Javakheti Fault may pose considerable seismic hazard for trans-boundary areas of Armenia and Georgia as its northern flank is located at the distance of 15 km from the Baku-Ceyhan pipeline. JF - American Geophysical Union Fall Meeting AU - Melkonyan, R AU - Karakhanyan, A AU - Avanesyan, M AU - Elashvili, M AU - Godoladze, T AU - Javakhishvili, Z AU - Korzhenkov, A AU - Philip, S AU - Vergino, E S AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S43J EP - 02 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566815984?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Armenia-to-Georgia+trans-boundary+fault%3B+an+example+of+international+cooperation+in+the+Caucasus&rft.au=Melkonyan%2C+R%3BKarakhanyan%2C+A%3BAvanesyan%2C+M%3BElashvili%2C+M%3BGodoladze%2C+T%3BJavakhishvili%2C+Z%3BKorzhenkov%2C+A%3BPhilip%2C+S%3BVergino%2C+E+S%3BAnonymous&rft.aulast=Melkonyan&rft.aufirst=R&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - The uplift of the greater and Lesser Caucasus; continental collision to subduction AN - 1566815599; 2014-077919 AB - The Caucasus is a part of the orogenic belt which formed as the result of the closure of the Neo Tethys Ocean and the corresponding continental collision of Arabian and Eurasian plates. This region includes the southwestern part of the Caspian basin, the Kura basin, the Lesser and Greater Caucasus mountains, and the East Anatolian and North Iranian plateaus. A number of tomographic studies of both P and S wave velocities all show a broad low velocity zone beneath East Anatolian and North Iranian plateaus and most models show three high velocity zones located under the eastern part of the Greater Caucasus, the Talesh and Pontides. The low velocity zone is observed starting right at the moho down to 150 km, which suggests asthenospheric material underlying a very thin lithosphere of eastern Anatolia where widespread Late Miocene - Quaternary calc-alkaline volcanic products of mantle origin are reported. There appears to be a high velocity body beneath the eastern Greater Caucasus and Kura Basin at depths below the Moho down to 180 km, and apparently represents either a thick lithospheric mantle root or a shallow subducting slab associated with the South Caspian block. This high velocity model may extend to the eastern end of the Greater Caucasus. In addition to the seismological observations, recent geologic studies suggest that the uplift of the Greater Caucasus has occurred primarily over the past 5 Ma. One of the critical questions related to earthquakes is the existence of deep earthquakes in the northeastern Greater Caucasus. Recent work by the Geophysical Survey of Russia has indicated that seismicity in this region extends to nearly 200 km depth. It is important to confirm these observations and to minimize uncertainties in the depths in order to understand the spatial patterns of these deep earthquakes. Having reliable locations of these events may indicate whether there is a previously undiscovered subduction zone beneath a portion of the Greater Caucasus. In order to image and thereby understand the uplift mechanism of the Caucasus we propose to establish a very ambitious multi-national seismic study that would cross key parts of the Lesser and Greater Caucasus and help to test the models for intracontinental orogenic uplift. JF - American Geophysical Union Fall Meeting AU - Sandvol, E A AU - Mackey, K G AU - Nabelek, J AU - Godoladze, T AU - Malovichko, A AU - Yetirmishli, G AU - Karakhanyan, A AU - Gok, R AU - Mellors, R J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S43J EP - 06 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566815599?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+uplift+of+the+greater+and+Lesser+Caucasus%3B+continental+collision+to+subduction&rft.au=Sandvol%2C+E+A%3BMackey%2C+K+G%3BNabelek%2C+J%3BGodoladze%2C+T%3BMalovichko%2C+A%3BYetirmishli%2C+G%3BKarakhanyan%2C+A%3BGok%2C+R%3BMellors%2C+R+J%3BAnonymous&rft.aulast=Sandvol&rft.aufirst=E&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - LLNL-G3Dv3; global P-wave tomography model for improved regional and teleseismic travel time prediction AN - 1566815517; 2014-078071 AB - We develop a global-scale P-wave velocity model (LLNL-G3Dv3) designed to accurately predict seismic travel times at regional and teleseismic distances simultaneously. The model provides a new image of Earth's interior, but the underlying practical purpose of the model is to provide enhanced seismic event location capabilities. The LLNL-G3Dv3 model is based on nearly equal 2.8 million P and Pn arrivals that are re-processed using our global multiple-event locator called Bayesloc. We construct LLNL-G3Dv3 within a spherical tessellation based framework, allowing for explicit representation of undulating and discontinuous layers including the crust and transition zone layers. Using a multi-scale inversion technique, regional trends as well as fine details are captured where the data allow. LLNL-G3Dv3 exhibits large-scale structures including cratons and superplumes as well numerous complex details in the upper mantle including within the transition zone. Particularly, the model reveals new details of a vast network of subducted slabs trapped within the transition beneath much of Eurasia, including beneath the Tibetan Plateau. We demonstrate the impact of Bayesloc multiple-event location on the resulting tomographic images through comparison with images produced without the benefit of multiple-event constraints (single-event locations). We find that the multiple-event locations allow for better reconciliation of the large set of direct P phases recorded at 0-97 degrees distance and yield a smoother and more continuous image relative to the single-event locations. Travel times predicted from a 3-D model are also found to be strongly influenced by the initial locations of the input data, even when an iterative inversion/relocation technique is employed. This work performed under the auspices of the U. S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-559093 JF - American Geophysical Union Fall Meeting AU - Simmons, N A AU - Myers, S C AU - Johannesson, G AU - Matzel, E AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S52D EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566815517?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=LLNL-G3Dv3%3B+global+P-wave+tomography+model+for+improved+regional+and+teleseismic+travel+time+prediction&rft.au=Simmons%2C+N+A%3BMyers%2C+S+C%3BJohannesson%2C+G%3BMatzel%2C+E%3BAnonymous&rft.aulast=Simmons&rft.aufirst=N&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Convective removal of the northeastern portion of the North-American tectospheric root and the late Cenozoic uplift of the Appalachians AN - 1566810025; 2014-075373 AB - The underlying cause of the present elevation of the Appalachians remains enigmatic. We explore the hypothesis that convective removal of the mantle tectospheric root of cratonic North America is, at least in part, responsible for the current elevation of the Appalachians. We utilize mantle convection models driven by buoyancy inferred from seismic tomography models that satisfy a combined set of geodynamic constraints related to the present-day plate-motions, surface gravity, dynamic topography anomalies, and excess core ellipticity (Simmons et al., 2007; 2009). The resulting present day flow depicts a dense subcrustal lithosphere that is being convectively removed by an influx of hot asthenospheric mantle from the east associated with a convection cell driven in part by the ongoing subduction of the Farallon slab deep in the mantle beneath Eastern North America. To study the evolution of this process, we employ backward-in-time mantle convection calculations that are based on a high-Rayleigh approximation to the time-dependent equation for conservation of (thermal) energy and examine its geologic and geophysical consequences. Our first order results are compatible with an early to mid-Miocene rejuvenation of the Appalachians. JF - American Geophysical Union Fall Meeting AU - Moucha, R AU - Rowley, D B AU - Levin, V L AU - Simmons, N A AU - Forte, A M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract T11B EP - 2566 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566810025?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Convective+removal+of+the+northeastern+portion+of+the+North-American+tectospheric+root+and+the+late+Cenozoic+uplift+of+the+Appalachians&rft.au=Moucha%2C+R%3BRowley%2C+D+B%3BLevin%2C+V+L%3BSimmons%2C+N+A%3BForte%2C+A+M%3BAnonymous&rft.aulast=Moucha&rft.aufirst=R&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Model-based corrections to observed azimuth and slowness deviations from a dipping Mohorovicic discontinuity AN - 1566809863; 2014-078151 AB - Back azimuth and slowness anomalies observed at seismic arrays can be used to constrain local and distant structural and propagation effects in the Earth. Observations of large systematic deviations in both azimuth and slowness measured for several P phases (i.e., Pg, Pn, P, PKP) recorded at several IMS arrays show a characteristic sinusoidal pattern when plotted as a function of theoretical back azimuth. These deviations are often interpreted as the affect of the wavefield being systematically bent by refraction from a dipping velocity structure beneath the array, most likely a dipping Moho. We develop a model-based technique that simultaneously fits back azimuth and slowness observations with a ray-based prediction that incorporates a dipping layer defined by its strike and dip. Because the azimuth and slowness deviations both vary as a function of true azimuth, fitting both residuals jointly will give a more consistent calibration for the array. The technique is used to fit over 9900 observations at CMAR from a global distribution of well-located seismic events. Under the assumption that the dipping layer is the Moho with mantle velocity 8.04 km/sec and crustal velocity 6.2 km/sec, we estimate that Moho strike and dip under the CMAR array are 192.6 degrees and 18.3 degrees , respectively. When the trend of the Moho is removed from the back azimuth and slowness residuals, both the sinuous trend and variations with predicted slowness are mitigated. While a dipping interface model does not account for all of the discrepancy between observed and predicted back azimuth and slowness anomalies, and additional calibration whether empirical or model based should be pursued, this technique is a good first step in the calibration procedure for arrays exhibiting sinusoidal residual trends. JF - American Geophysical Union Fall Meeting AU - Flanagan, M P AU - Myers, S C AU - Simmons, N A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S53E EP - 2541 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566809863?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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-based+corrections+to+observed+azimuth+and+slowness+deviations+from+a+dipping+Mohorovicic+discontinuity&rft.au=Flanagan%2C+M+P%3BMyers%2C+S+C%3BSimmons%2C+N+A%3BAnonymous&rft.aulast=Flanagan&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - A comprehensive dispersion model of surface wave phase and group velocity AN - 1566809793; 2014-078155 AB - In order to complement our large datasets of surface wave group arrival times, we have adapted our cluster analysis method of group velocity measurement to measure phase velocity. When measuring phase, we are no longer working with waveform envelopes and we must be very careful to avoid cycle-skipping. We correct for source phase and the predicted phase shift due to 3d structure by using a nominal phase velocity map. This latter step is important at periods shorter than 100 seconds but is not necessary at longer periods. We have processed all the long period data from IRIS from 1988 to 2007. Currently, we have finished phase measurements for Love wave from 7 mHz to 30 mHz. This dataset contains about 200,000 measurements at 10 mHz and about 100,000 measurements at 30 mHz. The phase dataset for Rayleigh waves is complete from 5 mHz to 25 mHz, and has about 600,000 measurements at 10 mHz and 400,000 measurements at 25 mHz. We see no difficulty in extending the Rayleigh wave measurements to, say, 40 mHz to complement our group velocity measurements. In order to find a dispersion model that simultaneously matches both phase and group data, we use b-splines to parameterize the frequency dependence of the phase velocity. We find that a parameterization of equally spaced b-splines with an interval of 2 mHz is sufficient to explain both our phase and group velocity maps consistently. At long periods, there is a strong tradeoff between the isotropic part of the Rayleigh wave phase velocity and azimuthal anisotropy (e.g. Ekstrom, 2011). This effect is mainly confined to the Pacific basin where azimuthal anisotropy is coherent over large distances and results in significant signal. We include the effect of azimuthal anisotropy in our inversions in order to obtain a reliable isotropic part of the phase velocity. Patterns in the fast directions of Rayleigh wave azimuthal anisotropy and their reliability will also be discussed. JF - American Geophysical Union Fall Meeting AU - Ma, Z AU - Masters, G AU - Laske, G AU - Pasyanos, M E AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S53F EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566809793?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+comprehensive+dispersion+model+of+surface+wave+phase+and+group+velocity&rft.au=Ma%2C+Z%3BMasters%2C+G%3BLaske%2C+G%3BPasyanos%2C+M+E%3BAnonymous&rft.aulast=Ma&rft.aufirst=Z&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Foreshocks of Parkfield and Landers (revisited) AN - 1566809497; 2014-078095 AB - We use subspace detectors consisting of catalog seismicity to detect thousands of new foreshocks to the 2006 M6 Parkfield and 1992 M7.2 Landers earthquakes. JF - American Geophysical Union Fall Meeting AU - Ford, S R AU - Dodge, D AU - Kedar, S AU - Harris, D B AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S53A EP - 2485 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566809497?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Foreshocks+of+Parkfield+and+Landers+%28revisited%29&rft.au=Ford%2C+S+R%3BDodge%2C+D%3BKedar%2C+S%3BHarris%2C+D+B%3BAnonymous&rft.aulast=Ford&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Shear wave splitting in the East Anatolian-Caucasus region AN - 1560084435; 2014-068775 AB - The ongoing continent-continent collision of Arabia and Eurasia has mostly produced strike slip fault deformation within the East Anatolian plateau and Lesser Caucasus. In comparison, the deformation style in the Greater Caucasus is dominated by folding and thrust faulting. Such distinct tectonic characteristics of these neighboring regions cannot be comprehensively explained without studying the regional upper mantle structure. We analyzed the data from the IRIS station KIV and the regional seismic networks of Turkey, Azerbaijan and Georgia to determine shear wave splitting fast polarization directions and delay times in the region. Our results show that the fast polarization directions are quite uniformly parallel to NE-SW across the East Anatolian Plateau and the westernmost part of the Greater Caucasus. The observed delay times decrease northward with the shortest located in the western Greater Caucasus. However, as we continue east, we observe a gradual clockwise rotation of the upper mantle fabric until it becomes parallel to the EW trend in the Lesser Caucasus where the delay times are the largest in the region. The situation is even more complex north of the Lesser Caucasus, in the central and eastern parts of the Greater Caucasus, where the fast polarization directions suddenly turn back and become NNE-SSW. We interpret the gradual rotation in the orientation of the upper mantle fabric and the eastward increase of the delay times in the East Anatolian Plateau as the manifestation of the broken off and sinking Neo Tethys slab. In our opinion, the fast polarization directions in the central and eastern parts of the Greater Caucasus are associated with the strain resulted from subduction of the Kura basin lithosphere beneath that part of the mountain range. The differences in the crustal deformation styles of the East Anatolian Plateau and the Greater Caucasus are dictated in large part by the regional upper mantle geodynamic processes. That is confirmed by the abrupt change in the fast polarization directions between the Lesser and Greater Caucasus. JF - American Geophysical Union Fall Meeting AU - Skobeltsyn, G AU - Mellors, R J AU - Gok, R AU - Turkelli, N AU - Yetirmishli, G AU - Godoladze, Tea AU - Sandvol, E A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract T33B EP - 2664 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560084435?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Shear+wave+splitting+in+the+East+Anatolian-Caucasus+region&rft.au=Skobeltsyn%2C+G%3BMellors%2C+R+J%3BGok%2C+R%3BTurkelli%2C+N%3BYetirmishli%2C+G%3BGodoladze%2C+Tea%3BSandvol%2C+E+A%3BAnonymous&rft.aulast=Skobeltsyn&rft.aufirst=G&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-09-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Putting the fizz in the fissure; geochemical and geomechanical effects of carbonated brine in a natural fracture AN - 1560083329; 2014-067026 AB - The increased mobility and buoyancy of CO2, coupled with rising demands for renewable energy production, make it an attractive alternative heat-exchange fluid in lieu of water for use in enhanced geothermal systems (EGS). However, the geochemical impact of elevated CO2 levels on these engineered systems and the consequent effects on reservoir capacity and system permeability are poorly-constrained at present, leading to uncertainty in predictions of longer-term reservoir performance. For example, consistently high levels of aqueous CO2 cycling through the subsurface may result in relatively rapid and extensive dissolution of pH-sensitive minerals, with an increased risk of secondary alteration phase precipitation (e.g., oxides, clays, and/or carbonate minerals) and adverse effects on EGS resource productivity. If, however, injected CO2-rich fluids traverse the system primarily through fracture networks, other factors such as accessibly reactive surface areas, fracture asperity susceptibility, and fracture surface/wallrock exchange may also factor into the ultimate evolution of reservoir permeability. To evaluate the comparative impacts of both geochemistry and geomechanics in sustaining fracture network flow under conditions relevant to CO2-EGS, a 60-day core-flooding experiment was conducted on a naturally fractured and chemically complex greywacke core sample exposed to CO2-acidified brine at 200C and 25 MPa. The objective of this study was to investigate the potential effects of using CO2 as a heat-exchange fluid on fracture flow and reaction within a pre-existing well-characterized fracture representative of reactivated fractures targeted for stimulation in many EGS projects. Over the course of the experiment, changes in solution chemistry and pressure/permeability were monitored. In addition, pre- and post-reaction three-dimensional high-resolution X-ray computed tomography (XRCT) imaging was used to determine changes in fracture aperture and geometry as well as compositional variation and extent of reaction. Particle image velocimetry (PIV) analysis is applied to the XRCT data to reveal local deformation in the core and improve calculation of the porosity generated during experimental brine-CO2-core reaction. This experimental dataset will be used to calibrate a coupled numerical geochemical and geomechanical model describing fracture growth and sealing within the fracture network in response to geochemical changes. Experimental and simulation results will be presented and their implications for CO2-EGS discussed. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Smith, M M AU - Walsh, S D AU - Carroll, S AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract T13J EP - 06 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560083329?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Putting+the+fizz+in+the+fissure%3B+geochemical+and+geomechanical+effects+of+carbonated+brine+in+a+natural+fracture&rft.au=Smith%2C+M+M%3BWalsh%2C+S+D%3BCarroll%2C+S%3BAnonymous&rft.aulast=Smith&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-09-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Variations in the Sr/Ca, delta (super 44) Ca and delta (super 18) O composition of calcite as a function of solution chemistry and crystal growth rate AN - 1549620033; 2014-057182 AB - The trace element and isotopic composition of calcite can be used to probe the temperatures and rates of mineral formation as well as the degree of post-mineralization alteration. The accuracy with which these effects can be interpreted is limited by our ability to distinguish signatures arising from equilibrium partitioning versus kinetic or mass transport effects. Our focus in this work is on mass transport effects in aqueous environments, and specifically, the growth rate-dependence of trace element and isotopic incorporation into calcite. This requires experiments in which the degree of supersaturation, or the solution chemistry, is held constant and the rate of crystal growth can be determined. In our experiments, N (sub 2) +CO (sub 2) gas mixture is bubbled through a beaker containing 1300 mL of solution (30 mM CaCl (sub 2) +5 mM NH (sub 4) Cl+0.1 mM SrCl (sub 2) ). The degree of supersaturation with respect to calcite is controlled by the pCO (sub 2) of the gas mixture, which is constantly replenished from a gas source. As CO (sub 2) from the gas dissolves into solution, calcite crystals grow on the beaker walls and the pH of the solution is maintained by use of an autotitrator with NaOH as the titrant. During an experiment we control the temperature, pH, the pCO (sub 2) of the gas inflow, and the gas inflow rate. At the same time we monitor the total alkalinity, the pCO (sub 2) of the gas outflow, the gas outflow rate, and the amount of NaOH added. The rate of calcite precipitation can be determined in three ways: (1) the change in total alkalinity due to Ca (super 2+) removal, mass balance of C in the system, and (3) post-run measurement of [Ca (super 2+) ] in aliquots of solution taken during an experiment. We present results from experiments where growth rates are estimated to range from 0.5 to 16 mmol/m (super 2) /hr. Our experiments thus far have yielded calcite crystals that are out of calcium and oxygen isotopic equilibrium with the parent solution. Crystals are enriched in the light isotope of Ca by 0.4 to 1.8 ppm. The light isotope enrichment increases with growth rate and is correlated with Sr/Ca in calcite. These results are in excellent agreement with the results of Tang et al. (2008) for crystals grown at 25 degrees C and suggest that mass discrimination is controlled by mass transport kinetics at the mineral-solution interface. Oxygen isotopes are more complicated because of the addition of CO (sub 2) to the bulk solution. For crystals grown from our stock solution, the O composition is highly variable and not correlated with growth rate. We attribute this to relatively slow kinetics of O isotope exchange between gaseous or dissolved CO (sub 2) and water. For crystals grown in the presence of 0.01 grams of bovine carbonic anhydrase (CA), an enzyme which catalyzes the interconversion of CO (sub 2) and H (sub 2) O to bicarbonate and protons, the O isotope composition of calcite appears to be independent of growth rate. Hence addition of CA to solution might offer a means of determining the equilibrium fractionation factor for oxygen isotopes in carbonate minerals. We will present results from additional experiments that test how CA and other organic molecules in solution affect the growth rate and mass discrimination during mineral precipitation. JF - American Geophysical Union Fall Meeting AU - Watkins, J M AU - DePaolo, D J AU - Ryerson, F J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract V51A EP - 2748 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549620033?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+the+Sr%2FCa%2C+delta+%28super+44%29+Ca+and+delta+%28super+18%29+O+composition+of+calcite+as+a+function+of+solution+chemistry+and+crystal+growth+rate&rft.au=Watkins%2C+J+M%3BDePaolo%2C+D+J%3BRyerson%2C+F+J%3BAnonymous&rft.aulast=Watkins&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&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 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Heavily metamorphosed clasts from the CV chondrite breccias Mokoia and Yamato-86009 AN - 1442375078; 2013-081318 AB - Metamorphosed clasts in the CV carbonaceous chondrite breccias Mokoia and Yamato-86009 (Y-86009) are coarse-grained, granular, polymineralic rocks composed of Ca-bearing (up to 0.6 wt% CaO) ferroan olivine (Fa (sub 34-39) ), ferroan Al-diopside (Fs (sub 9-13) Wo (sub 47-50) , approximately 2-7 wt% Al (sub 2) O (sub 3) ), plagioclase (An (sub 37-84) Ab (sub 63-17) ), Cr-spinel (Cr/(Cr + Al) = 0.19-0.45, Fe/(Fe + Mg) = 0.60-0.79), nepheline, pyrrhotite, pentlandite, Ca-phosphate, and rare grains of Ni-rich taenite; low-Ca pyroxene is absent. Most clasts have triple junctions between silicate grains, indicative of prolonged thermal annealing. Based on the olivine-spinel and pyroxene thermometry, the estimated metamorphic temperature recorded by the clasts is approximately 1100 K. Few clasts experienced thermal metamorphism to a lower degree and preserved chondrule-like textures. The Mokoia and Y-86009 clasts are mineralogically unique and different from metamorphosed chondrites of known groups (H, L, LL, R, EH, EL, CO, CK) and primitive achondrites (acapulcoites, brachinites, lodranites). On a three-isotope oxygen diagram, compositions of olivine in the clasts plot along carbonaceous chondrite anhydrous mineral line and the Allende mass-fractionation line, and overlap with those of the CV chondrule olivines; the Delta (super 17) O values of the clasts range from about -4.3 ppm to -3.0 ppm. We suggest that the clasts represent fragments of the CV-like material that experienced metasomatic alteration, high-temperature metamorphism, and possibly melting in the interior of the CV parent asteroid. The lack of low-Ca pyroxene in the clasts could be due to its replacement by ferroan olivine during iron-alkali metasomatic alteration or by high-Ca ferroan pyroxene during melting under oxidizing conditions. JF - Meteoritics & Planetary Science AU - Jogo, Kaori AU - Nagashima, Kazuhide AU - Hutcheon, Ian D AU - Krot, Alexander N AU - Nakamura, Tomoki Y1 - 2012/12// PY - 2012 DA - December 2012 SP - 2251 EP - 2268 PB - Meteoritical Society, Fayetteville, AR VL - 47 IS - 12 SN - 1086-9379, 1086-9379 KW - stony meteorites KW - oxygen KW - isotopes KW - CV chondrites KW - thermal history KW - metasomatism KW - stable isotopes KW - electron probe data KW - meteorites KW - Mokoia Meteorite KW - mineral composition KW - hydrothermal alteration KW - chondrites KW - chemical composition KW - O-17/O-16 KW - Yamato Meteorites KW - isotope ratios KW - Y-86009 KW - parent bodies KW - thermal metamorphism KW - O-18/O-16 KW - clasts KW - carbonaceous chondrites KW - metamorphism KW - petrography KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1442375078?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Heavily+metamorphosed+clasts+from+the+CV+chondrite+breccias+Mokoia+and+Yamato-86009&rft.au=Jogo%2C+Kaori%3BNagashima%2C+Kazuhide%3BHutcheon%2C+Ian+D%3BKrot%2C+Alexander+N%3BNakamura%2C+Tomoki&rft.aulast=Jogo&rft.aufirst=Kaori&rft.date=2012-12-01&rft.volume=47&rft.issue=12&rft.spage=2251&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12042 L2 - http://cavern.uark.edu/~meteor/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 87 N1 - PubXState - AR N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2013-10-17 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - carbonaceous chondrites; chemical composition; chondrites; clasts; CV chondrites; electron probe data; hydrothermal alteration; isotope ratios; isotopes; metamorphism; metasomatism; meteorites; mineral composition; Mokoia Meteorite; O-17/O-16; O-18/O-16; oxygen; parent bodies; petrography; stable isotopes; stony meteorites; thermal history; thermal metamorphism; Y-86009; Yamato Meteorites DO - http://dx.doi.org/10.1111/maps.12042 ER - TY - JOUR T1 - Multiphysics hillslope processes triggering landslides AN - 1438971520; 2013-074972 AB - In 1996, a portion of a highly instrumented experimental catchment in the Oregon coast range failed as a large debris flow from heavy rain. For the first time, we quantify the 3-D multiphysical aspects that triggered this event, including the coupled sediment deformation-fluid flow processes responsible for mobilizing the slope failure. Our analysis is based on a hydromechanical continuum model that accounts for the loss of sediment strength due to increased saturation as well as the frictional drag exerted by the moving fluid. Our studies highlight the dominant role that bedrock topography and rainfall history played in defining the failure mechanism, as indicated by the location of the scarp zone that was accurately predicted by our 3-D continuum model. Copyright 2012 Springer-Verlag Berlin Heidelberg and Springer-Verlag JF - Acta Geotechnica (Berlin) AU - Borja, Ronaldo I AU - Liu, Xiaoyu AU - White, Joshua A Y1 - 2012/12// PY - 2012 DA - December 2012 SP - 261 EP - 269 PB - Springer-Verlag, co-published with Versita, Heidelberg-Berlin VL - 7 IS - 4 SN - 1861-1125, 1861-1125 KW - United States KW - precursors KW - shear strength KW - geologic hazards KW - Mettman Ridge KW - unsaturated zone KW - plastic flow KW - debris flows KW - Oregon KW - topography KW - mass movements KW - sediments KW - failures KW - numerical models KW - three-dimensional models KW - strength KW - rainfall KW - loading KW - friction KW - mechanical properties KW - deformation KW - landslides KW - Coast Ranges KW - saturation KW - natural hazards KW - scarps KW - slope stability KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1438971520?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Acta+Geotechnica+%28Berlin%29&rft.atitle=Multiphysics+hillslope+processes+triggering+landslides&rft.au=Borja%2C+Ronaldo+I%3BLiu%2C+Xiaoyu%3BWhite%2C+Joshua+A&rft.aulast=Borja&rft.aufirst=Ronaldo&rft.date=2012-12-01&rft.volume=7&rft.issue=4&rft.spage=261&rft.isbn=&rft.btitle=&rft.title=Acta+Geotechnica+%28Berlin%29&rft.issn=18611125&rft_id=info:doi/10.1007%2Fs11440-012-0175-6 L2 - http://www.springerlink.com/content/1861-1133/?p LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2013-01-01 N1 - Number of references - 38 N1 - Document feature - illus. N1 - Last updated - 2013-10-03 N1 - SubjectsTermNotLitGenreText - Coast Ranges; debris flows; deformation; failures; friction; geologic hazards; landslides; loading; mass movements; mechanical properties; Mettman Ridge; natural hazards; numerical models; Oregon; plastic flow; precursors; rainfall; saturation; scarps; sediments; shear strength; slope stability; strength; three-dimensional models; topography; United States; unsaturated zone DO - http://dx.doi.org/10.1007/s11440-012-0175-6 ER - TY - JOUR T1 - Uncertainty quantification of CO sub(2) leakage through a fault with multiphase and nonisothermal effects AN - 1434020963; 18490286 AB - The potential for CO sub(2) leakage through a permeable fault is a key concern for geologic CO sub(2) sequestration (GCS) in saline formations. If CO sub(2) migrates vertically upward through a fault from the storage reservoir to an overlying fresh-water aquifer, phase change can occur because temperature and pressure decrease with decreasing depth. The decrease in CO sub(2) density during phase transition causes an additional reduction in temperature. In this paper, we present a computational model for simulating the behaviour of a leaky fault connecting a saline CO sub(2) storage reservoir and an overlying fresh-water aquifer. We address phase transition, considering the nonlinear CO sub(2) enthalpy and viscosity functions. The model results indicate that the CO sub(2) leakage rate initially increases when CO sub(2) migration is driven by both buoyancy and overpressure during the period of injection. In the post-injection period, CO sub(2) leakage is only driven by buoyancy and the leakage rate decreases. The influence of nonisothermal conditions is more pronounced during the first stage. The deterministic model of this faulted reservoir system is used within an uncertainty quantification (UQ) framework to rigorously quantify the sensitivity of the brine and CO sub(2) leakage in response to the uncertain model parameters. The results demonstrate that fault permeability is the most sensitive factor affecting both CO sub(2) and brine leakage rate. Reduced-order models of CO sub(2) and brine leakage are developed for the emulation of a large number of sample points, from which probability distributions are derived and can be incorporated in risk assessment of groundwater contamination resulting from CO sub(2) and brine leakage. [copy 2012 Society of Chemical Industry and John Wiley & Sons, Ltd JF - Greenhouse Gases: Science and Technology AU - Lu, Chuanhe AU - Sun, Yunwei AU - Buscheck, Thomas A AU - Hao, Yue AU - White, Joshua A AU - Chiaramonte, Laura AD - National Laboratory, 7000 East Avenue, Livermore, CA 94551, USA., lu25@llnl.gov Y1 - 2012/12// PY - 2012 DA - Dec 2012 SP - 445 EP - 459 PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 2 IS - 6 SN - 2152-3878, 2152-3878 KW - Risk Abstracts; Pollution Abstracts; Environment Abstracts KW - Aquifers KW - Storage KW - Leakage KW - Temperature KW - Groundwater pollution KW - Carbon dioxide KW - Greenhouse gases KW - Reservoirs KW - Migration KW - P 0000:AIR POLLUTION KW - R2 23010:General: Models, forecasting KW - ENA 02:Toxicology & Environmental Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434020963?accountid=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=Greenhouse+Gases%3A+Science+and+Technology&rft.atitle=Uncertainty+quantification+of+CO+sub%282%29+leakage+through+a+fault+with+multiphase+and+nonisothermal+effects&rft.au=Lu%2C+Chuanhe%3BSun%2C+Yunwei%3BBuscheck%2C+Thomas+A%3BHao%2C+Yue%3BWhite%2C+Joshua+A%3BChiaramonte%2C+Laura&rft.aulast=Lu&rft.aufirst=Chuanhe&rft.date=2012-12-01&rft.volume=2&rft.issue=6&rft.spage=445&rft.isbn=&rft.btitle=&rft.title=Greenhouse+Gases%3A+Science+and+Technology&rft.issn=21523878&rft_id=info:doi/10.1002%2Fghg.1309 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Last updated - 2013-10-21 N1 - SubjectsTermNotLitGenreText - Storage; Aquifers; Leakage; Temperature; Groundwater pollution; Greenhouse gases; Carbon dioxide; Migration; Reservoirs DO - http://dx.doi.org/10.1002/ghg.1309 ER - TY - JOUR T1 - An Immersed Boundary Method Enabling Large-Eddy Simulations of Flow over Complex Terrain in the WRF Model AN - 1257778084; 17464611 AB - This paper describes a three-dimensional immersed boundary method (IBM) that facilitates the explicit resolution of complex terrain within the Weather Research and Forecasting (WRF) model. Two interpolation methods-trilinear and inverse distance weighting (IDW)-are used at the core of the IBM algorithm. This work expands on the previous two-dimensional IBM algorithm of Lundquist et al., which uses bilinear interpolation. Simulations of flow over a three-dimensional hill are performed with WRF's native terrain-following coordinate and with both IB methods. Comparisons of flow fields from the three simulations show excellent agreement, indicating that both IB methods produce accurate results. IDW proves more adept at handling highly complex urban terrain, where the trilinear interpolation algorithm fails. This capability is demonstrated by using the IDW core to model flow in Oklahoma City, Oklahoma, from intensive observation period 3 (IOP3) of the Joint Urban 2003 field campaign. Flow in Oklahoma City is simulated concurrently with an outer domain with flat terrain using one-way nesting to generate a turbulent flow field. Results from the IBM-WRF simulation of IOP3 compare well with observations from the field campaign, as well as with results from an urban computational fluid dynamics code, Finite Element Model in 3-Dimensions and Massively Parallelized (FEM3MP), which used body-fitted coordinates. Using the FAC2 performance metric from Chang and Hanna, which is the fraction of predictions within a factor of 2 of observations, IBM-WRF achieves 100% and 71% for velocity predictions using cup and sonic anemometer observations, respectively. For the passive scalar, 53% of the model predictions meet the FAC5 (factor of 5) criteria. JF - Monthly Weather Review AU - Lundquist, Katherine A AU - Chow, Fotini Katopodes AU - Lundquist, Julie K AD - Lawrence Livermore National Laboratory, Livermore, California Y1 - 2012/12// PY - 2012 DA - Dec 2012 SP - 3936 EP - 3955 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 140 IS - 12 SN - 0027-0644, 0027-0644 KW - Aqualine Abstracts; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts KW - Prediction KW - Turbulent Flow KW - Algorithms KW - USA, Oklahoma, Oklahoma City KW - USA, Oklahoma KW - Cores KW - Nesting KW - Anemometers KW - Sonic anemometers KW - Weather KW - Turbulent flow KW - Large eddy simulations KW - Model Studies KW - Interpolation KW - Numerical simulations KW - Boundaries KW - Fluid dynamics KW - SW 5010:Network design KW - AQ 00006:Sewage KW - M2 551.509.1/.5:Forecasting (551.509.1/.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1257778084?accountid=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=Monthly+Weather+Review&rft.atitle=An+Immersed+Boundary+Method+Enabling+Large-Eddy+Simulations+of+Flow+over+Complex+Terrain+in+the+WRF+Model&rft.au=Lundquist%2C+Katherine+A%3BChow%2C+Fotini+Katopodes%3BLundquist%2C+Julie+K&rft.aulast=Lundquist&rft.aufirst=Katherine&rft.date=2012-12-01&rft.volume=140&rft.issue=12&rft.spage=3936&rft.isbn=&rft.btitle=&rft.title=Monthly+Weather+Review&rft.issn=00270644&rft_id=info:doi/10.1175%2FMWR-D-11-00311.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-12-01 N1 - Number of references - 38 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Turbulent flow; Numerical simulations; Fluid dynamics; Algorithms; Sonic anemometers; Large eddy simulations; Interpolation; Prediction; Weather; Turbulent Flow; Cores; Nesting; Boundaries; Anemometers; Model Studies; USA, Oklahoma; USA, Oklahoma, Oklahoma City DO - http://dx.doi.org/10.1175/MWR-D-11-00311.1 ER - TY - JOUR T1 - Reactive transport model and apparent K (sub d) of Ni in the near-field of a HLW repository in granite AN - 1244683767; 2013-008541 AB - Current performance assessment models for radionuclide migration through the near field of high-level radioactive waste repositories often rely on the assumption of a constant K (sub d) for sorption. The validity of such assumption is evaluated here with a reactive transport model for Ni (super 2+) in the near field of a repository in granite. Model results show that Ni (super 2+) sorbs mainly by surface complexation on weak sorption sites. The apparent K (sub d) of Ni (super 2+) , K (sub d) (super a) , depends on the concentration of dissolved Ni and pH and is constant only when the concentration of dissolved Ni is smaller than 10 (super -6) mol/L. The results of the sensitivity runs show that K (sub d) (super a) is sensitive to the water flux at the bentonite-granite interface, the effective diffusion of the bentonite and the concentration of weak sorption sites of the bentonite. The competition of other nuclides such as Cs (super +) on Ni (super 2+) sorption is not important. Corrosion products, however, affect significantly the sorption of Ni (super 2+) on the bentonite. The model with a constant K (sub d) does not reproduce the release rates of Ni (super 2+) from the bentonite into the granite. A model with a variable K (sub d) which depends on the concentration of dissolved Ni (super 2+) and pH may provide an acceptable surrogate of the multicomponent reactive transport model for the conditions of the repository considered in our model. Simulations using the K (sub d) -approach were performed with GoldSim based on the interpolation in the pH and concentration table, while the reactive transport model simulations were performed with CORE (super 2D) which incorporates multisite surface complexation. Abstract Copyright (2012) Elsevier, B.V. JF - Computers & Geosciences AU - Lu, Chuanhe AU - Samper, Javier AU - Cormenzana, Jose L AU - Ma, Hongyun AU - Montenegro, Luis AU - Cunado, Miguel A Y1 - 2012/12// PY - 2012 DA - December 2012 SP - 256 EP - 266 PB - Elsevier, Amsterdam VL - 49 SN - 0098-3004, 0098-3004 KW - solute transport KW - hazardous waste KW - sorption KW - geologic hazards KW - isotopes KW - igneous rocks KW - granites KW - complexing KW - data processing KW - aqueous solutions KW - simulation KW - reservoir rocks KW - radioactive waste KW - environmental management KW - reactivity KW - sedimentary rocks KW - radioactive isotopes KW - plutonic rocks KW - chemical reactions KW - cesium KW - transport KW - chemical composition KW - pH KW - high-level waste KW - numerical models KW - bentonite KW - alkali metals KW - solutes KW - migration of elements KW - hydrochemistry KW - models KW - metals KW - mathematical methods KW - nickel KW - natural hazards KW - theoretical models KW - mobilization KW - waste disposal KW - clastic rocks KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1244683767?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reactive+transport+model+and+apparent+K+%28sub+d%29+of+Ni+in+the+near-field+of+a+HLW+repository+in+granite&rft.au=Lu%2C+Chuanhe%3BSamper%2C+Javier%3BCormenzana%2C+Jose+L%3BMa%2C+Hongyun%3BMontenegro%2C+Luis%3BCunado%2C+Miguel+A&rft.aulast=Lu&rft.aufirst=Chuanhe&rft.date=2012-12-01&rft.volume=49&rft.issue=&rft.spage=256&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Geosciences&rft.issn=00983004&rft_id=info:doi/10.1016%2Fj.cageo.2012.06.003 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 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 65 N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2012-12-27 N1 - CODEN - GGEOD5 N1 - SubjectsTermNotLitGenreText - alkali metals; aqueous solutions; bentonite; cesium; chemical composition; chemical reactions; clastic rocks; complexing; data processing; environmental management; geologic hazards; granites; hazardous waste; high-level waste; hydrochemistry; igneous rocks; isotopes; mathematical methods; metals; migration of elements; mobilization; models; natural hazards; nickel; numerical models; pH; plutonic rocks; radioactive isotopes; radioactive waste; reactivity; reservoir rocks; sedimentary rocks; simulation; solute transport; solutes; sorption; theoretical models; transport; waste disposal DO - http://dx.doi.org/10.1016/j.cageo.2012.06.003 ER - TY - CPAPER T1 - Using Matrix Interpolation Reduced Order Modeling for Microstructure Design T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313081522; 6172662 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Lange, Kyle AU - White, Dan Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Mechanical engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313081522?accountid=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=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Using+Matrix+Interpolation+Reduced+Order+Modeling+for+Microstructure+Design&rft.au=Lange%2C+Kyle%3BWhite%2C+Dan&rft.aulast=Lange&rft.aufirst=Kyle&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Passive, Internal Thermal Management System for Batteries using Microscale Liquid-Vapor Phase Change T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313011759; 6170735 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Bandhauer, Todd AU - Garimella, Srinivas Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Batteries KW - Phase changes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313011759?accountid=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=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Passive%2C+Internal+Thermal+Management+System+for+Batteries+using+Microscale+Liquid-Vapor+Phase+Change&rft.au=Bandhauer%2C+Todd%3BGarimella%2C+Srinivas&rft.aulast=Bandhauer&rft.aufirst=Todd&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Coupling diverse new techniques to forecast stream/aquifer interactions AN - 1429841630; 2013-068720 AB - Measurement of groundwater/surface interactions has become an important component of hydrogeology. However, making these measurements remains a challenging and time consuming process. Compounding this is the variety of physical, chemical and thermal methods availalble, and the fact that these techniques are used independently or in isolation. In this work, we combine evolving thermal methods (DTS) with novel introduced tracers and naturally occurring radon in a sub-alpine, managed basin in the Lake Tahoe area. A gaining portion of the stream was instrumented with DTS, during a tracer injection of environmental benign xenon, sulfur hexafluoride and sampling of radon-222 and sulfur-35. In addition, traditional hydrometrics were carried out in order to attempt to quantify groundwater flux into the stream. As far as we know, this is the first time that xenon has been used in a stream setting, and our overall goal is to couple these novel tracer techniques for ecohydrology. JF - Abstracts with Programs - Geological Society of America AU - Tyler, Scott W AU - Moran, Jean E AU - Esser, Bradley K AU - Clark, Jordan F AU - Singleton, Michael J AU - Diaz, Stephanie H AU - Visser, Ate AU - Kobs, Scott AU - DeRubeis, Stephanie AU - Becker, Timothy AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 154 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - United States KW - California KW - technology KW - surface water KW - streams KW - geochemistry KW - Nevada KW - Lake Tahoe KW - ground water KW - aquifers KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429841630?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Coupling+diverse+new+techniques+to+forecast+stream%2Faquifer+interactions&rft.au=Tyler%2C+Scott+W%3BMoran%2C+Jean+E%3BEsser%2C+Bradley+K%3BClark%2C+Jordan+F%3BSingleton%2C+Michael+J%3BDiaz%2C+Stephanie+H%3BVisser%2C+Ate%3BKobs%2C+Scott%3BDeRubeis%2C+Stephanie%3BBecker%2C+Timothy%3BAnonymous&rft.aulast=Tyler&rft.aufirst=Scott&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=154&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, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-09-05 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - aquifers; California; geochemistry; ground water; Lake Tahoe; Nevada; streams; surface water; technology; United States ER - TY - JOUR T1 - A new P-velocity model for the Tethyan margin from a scaled S-velocity model and the inversion of P- and PKP-delay times AN - 1312832712; 2013-020714 AB - We estimate a 3D P-velocity model for the Tethyan margin by inverting P- and PKP-delay times. The inversion is relative to a 3D reference model, which is a scaled S-velocity model for the same region. This S-velocity model was derived by jointly inverting regional S and Rayleigh waveform fits, teleseismic arrival times, Rayleigh-wave group velocities, and independent Moho constraints. Thus, our 3D reference model includes structures resolved over a larger depth range as well as more information on aseismic regions with few stations than is typically obtained from traditional teleseismic delay time inversions. We then inverted P- and PKP-delay times to obtain perturbations relative to the scaled 3D reference model. Comparing our P-velocity model (EAPV11) with P-velocity models derived from P data only, we find a model with more uniform and better depth resolution, including velocity anomalies for aseismic regions with few stations such as North Africa, southeastern Arabia, and the East European platform. Using EAPV11 to predict arrival times for relatively accurately located events that were not used in the inversion shows that our model produces significant variance reductions for these data as well. Therefore, our approach to build P-velocity models based on 3D reference S-velocity models may provide a practical way to better estimate P-velocity anomalies in the uppermost mantle and beneath aseismic regions with few stations. Abstract Copyright (2012) Elsevier, B.V. JF - Physics of the Earth and Planetary Interiors AU - Chang, Sung-Joon AU - Van der Lee, Suzan AU - Flanagan, Megan P Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 1 EP - 7 PB - Elsevier, Amsterdam VL - 210-211 SN - 0031-9201, 0031-9201 KW - tomography KW - Tethys KW - P-waves KW - data processing KW - elastic waves KW - waveforms KW - surface waves KW - basins KW - velocity KW - tectonics KW - seismotectonics KW - aseismic margins KW - body waves KW - continental margin KW - seismology KW - three-dimensional models KW - PKP-waves KW - guided waves KW - lithosphere KW - inverse problem KW - anomalies KW - teleseismic signals KW - Rayleigh waves KW - Mohorovicic discontinuity KW - models KW - plate tectonics KW - mathematical methods KW - seismic waves KW - S-waves KW - 18:Solid-earth geophysics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312832712?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Physics+of+the+Earth+and+Planetary+Interiors&rft.atitle=A+new+P-velocity+model+for+the+Tethyan+margin+from+a+scaled+S-velocity+model+and+the+inversion+of+P-+and+PKP-delay+times&rft.au=Chang%2C+Sung-Joon%3BVan+der+Lee%2C+Suzan%3BFlanagan%2C+Megan+P&rft.aulast=Chang&rft.aufirst=Sung-Joon&rft.date=2012-11-01&rft.volume=210-211&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Physics+of+the+Earth+and+Planetary+Interiors&rft.issn=00319201&rft_id=info:doi/10.1016%2Fj.pepi.2012.08.005 L2 - http://www.sciencedirect.com/science/journal/00319201 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 30 N1 - Document feature - illus. N1 - Last updated - 2013-02-28 N1 - CODEN - PEPIAM N1 - SubjectsTermNotLitGenreText - anomalies; aseismic margins; basins; body waves; continental margin; data processing; elastic waves; guided waves; inverse problem; lithosphere; mathematical methods; models; Mohorovicic discontinuity; P-waves; PKP-waves; plate tectonics; Rayleigh waves; S-waves; seismic waves; seismology; seismotectonics; surface waves; tectonics; teleseismic signals; Tethys; three-dimensional models; tomography; velocity; waveforms DO - http://dx.doi.org/10.1016/j.pepi.2012.08.005 ER - TY - JOUR T1 - On the Correspondence between Short- and Long-Time-Scale Systematic Errors in CAM4/CAM5 for the Year of Tropical Convection AN - 1291607874; 17397863 AB - The correspondence between short- and long-time-scale systematic errors in the Community Atmospheric Model, version 4 (CAM4) and version 5 (CAM5), is systematically examined. The analysis is based on the annual-mean data constructed from long-term "free running" simulations and short-range hindcasts. The hindcasts are initialized every day with the ECMWF analysis for the Year(s) of Tropical Convection. It has been found that most systematic errors, particularly those associated with moist processes, are apparent in day 2 hindcasts. These errors steadily grow with the hindcast lead time and typically saturate after five days with amplitudes comparable to the climate errors. Examples include the excessive precipitation in much of the tropics and the overestimate of net shortwave absorbed radiation in the stratocumulus cloud decks over the eastern subtropical oceans and the Southern Ocean at about 60 degree S. This suggests that these errors are likely the result of model parameterization errors as the large-scale flow remains close to observed in the first few days of the hindcasts. In contrast, other climate errors are present in the hindcasts, but with amplitudes that are significantly smaller than and do not approach their climate errors during the 6-day hindcasts. These include the cold biases in the lower stratosphere, the unrealistic double-intertropical convergence zone pattern in the simulated precipitation, and an annular mode bias in extratropical sea level pressure. This indicates that these biases could be related to slower processes such as radiative and chemical processes, which are important in the lower stratosphere, or the result of poor interactions of the parameterized physics with the large-scale flow. JF - Journal of Climate AU - Xie, Shaocheng AU - Ma, Hsi-Yen AU - Boyle, James S AU - Klein, Stephen A AU - Zhang, Yuying AD - Lawrence Livermore National Laboratory, Livermore, California Y1 - 2012/11// PY - 2012 DA - Nov 2012 SP - 7937 EP - 7955 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 25 IS - 22 SN - 0894-8755, 0894-8755 KW - Meteorological & Geoastrophysical Abstracts; Sustainability Science Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Convection KW - Convergence zones KW - Sea level KW - Chemical process industry KW - Rainfall KW - Parameterization KW - Radiation KW - Ocean-atmosphere system KW - European Centre for Medium-Range Weather Forecasts KW - Marine KW - Climate KW - Simulation KW - Precipitation KW - Stratosphere KW - Sea level pressure KW - Clouds KW - Sea level pressures KW - Numerical simulations KW - Tropical convection KW - Oceans KW - Tropical environment KW - Tropical environments KW - PS, Antarctic Ocean KW - Q2 09243:Structure, mechanics and thermodynamics KW - M3 1010:Issues in Sustainable Development KW - M2 551.58:Climatology (551.58) KW - O 2050:Chemical Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1291607874?accountid=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+Climate&rft.atitle=On+the+Correspondence+between+Short-+and+Long-Time-Scale+Systematic+Errors+in+CAM4%2FCAM5+for+the+Year+of+Tropical+Convection&rft.au=Xie%2C+Shaocheng%3BMa%2C+Hsi-Yen%3BBoyle%2C+James+S%3BKlein%2C+Stephen+A%3BZhang%2C+Yuying&rft.aulast=Xie&rft.aufirst=Shaocheng&rft.date=2012-11-01&rft.volume=25&rft.issue=22&rft.spage=7937&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-12-00134.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Number of references - 37 N1 - Last updated - 2014-05-05 N1 - SubjectsTermNotLitGenreText - Convergence zones; Convection; Tropical environment; Climate; Parameterization; Ocean-atmosphere system; Stratosphere; Sea level pressure; Clouds; Sea level pressures; Numerical simulations; Radiation; Tropical convection; European Centre for Medium-Range Weather Forecasts; Precipitation; Sea level; Chemical process industry; Rainfall; Oceans; Tropical environments; Simulation; PS, Antarctic Ocean; Marine DO - http://dx.doi.org/10.1175/JCLI-D-12-00134.1 ER - TY - JOUR T1 - Low rates of bedrock outcrop erosion in the Central Appalachian Mountains inferred from in situ (super 10) Be AN - 1151911528; 2012-101443 AB - Bedrock outcrops are common on central Appalachian Mountain ridgelines. Because these ridgelines define watersheds, the rate at which they erode influences the pace of landscape evolution. To estimate ridgeline erosion rates, we sampled 72 quartz-bearing outcrops from the Potomac and Susquehanna River Basins and measured in situ-produced (super 10) Be. Ridgeline erosion rates average 9+ or -1 m m.y. (super -1) (median=6 m m.y. (super -1) ), similar to (super 10) Be-derived rates previously reported for the region. The range of erosion rates we calculated reflects the wide distribution of samples we collected and the likely inclusion of outcrops affected by episodic loss of thick slabs and periglacial activity. Outcrops on main ridgelines erode slower than those on mountainside spur ridges because ridgelines are less likely to be covered by soil, which reduces the production rate of (super 10) Be and increases the erosion rate of rock. Ridgeline outcrops erode slower than drainage basins in the Susquehanna and Potomac River watersheds, suggesting a landscape in disequilibrium. Erosion rates are more similar for outcrops meters to tens of meters apart than those at greater distances, yet semivariogram analysis suggests that outcrop erosion rates in the same physiographic province are similar even though they are hundreds of kilometers apart. This similarity may reflect underlying lithological and/or structural properties common to each physiographic province. Average (super 10) Be-derived outcrop erosion rates are similar to denudation rates determined by other means (sediment flux, fission-track thermochronology, [U-Th]/He dating), indicating that the pace of landscape evolution in the central Appalachian Mountains is slow, and has been since post-Triassic rifting events. JF - Geological Society of America Bulletin AU - Portenga, Eric W AU - Bierman, Paul R AU - Rizzo, Donna M AU - Rood, Dylan H Y1 - 2012/10/31/ PY - 2012 DA - 2012 Oct 31 SP - 201 EP - 215, unpaginated PB - Geological Society of America (GSA), Boulder, CO VL - 125 IS - 1-2 SN - 0016-7606, 0016-7606 KW - United States KW - relative age KW - Susquehanna River basin KW - isotopes KW - Appalachians KW - erosion rates KW - Cenozoic KW - (U-Th)/He KW - radioactive isotopes KW - geochronology KW - dates KW - Central Appalachians KW - drainage basins KW - absolute age KW - thermochronology KW - Potomac River basin KW - bedrock KW - North America KW - alkaline earth metals KW - in situ KW - Be-10 KW - Jurassic KW - variance analysis KW - landform evolution KW - statistical analysis KW - semivariograms KW - Mesozoic KW - fission-track dating KW - Tertiary KW - metals KW - geomorphology KW - beryllium KW - 23:Geomorphology KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1151911528?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geological+Society+of+America+Bulletin&rft.atitle=Low+rates+of+bedrock+outcrop+erosion+in+the+Central+Appalachian+Mountains+inferred+from+in+situ+%28super+10%29+Be&rft.au=Portenga%2C+Eric+W%3BBierman%2C+Paul+R%3BRizzo%2C+Donna+M%3BRood%2C+Dylan+H&rft.aulast=Portenga&rft.aufirst=Eric&rft.date=2012-10-31&rft.volume=125&rft.issue=1-2&rft.spage=201&rft.isbn=&rft.btitle=&rft.title=Geological+Society+of+America+Bulletin&rft.issn=00167606&rft_id=info:doi/10.1130%2FB30559.1 L2 - http://www.gsajournals.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, 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 - 2012-01-01 N1 - Number of references - 53 N1 - PubXState - CO N1 - Document feature - illus. incl. 3 tables, sketch map N1 - SuppNotes - With GSA Data Repository Item 2013023. N1 - Last updated - 2013-01-17 N1 - CODEN - BUGMAF N1 - SubjectsTermNotLitGenreText - (U-Th)/He; absolute age; alkaline earth metals; Appalachians; Be-10; bedrock; beryllium; Cenozoic; Central Appalachians; dates; drainage basins; erosion rates; fission-track dating; geochronology; geomorphology; in situ; isotopes; Jurassic; landform evolution; Mesozoic; metals; North America; Potomac River basin; radioactive isotopes; relative age; semivariograms; statistical analysis; Susquehanna River basin; Tertiary; thermochronology; United States; variance analysis DO - http://dx.doi.org/10.1130/B30559.1 ER - TY - CPAPER T1 - Evolution of Carbonate Dissolution Features Produced Under Variable pCO2 Conditions Relevant to CO2-EOR and Geologic CO2 Storage T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313123065; 6168460 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Carroll, Susan AU - Smith, Megan AU - Hao, Yue Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Storage KW - Geology KW - Carbon dioxide KW - Dissolution KW - Evolution KW - carbonates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313123065?accountid=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=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Evolution+of+Carbonate+Dissolution+Features+Produced+Under+Variable+pCO2+Conditions+Relevant+to+CO2-EOR+and+Geologic+CO2+Storage&rft.au=Carroll%2C+Susan%3BSmith%2C+Megan%3BHao%2C+Yue&rft.aulast=Carroll&rft.aufirst=Susan&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Reservoir Model Optimization Using the Seismic Response to CO2 Injection and Stochastic Inversion T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313110093; 6167120 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Ramirez, Abelardo Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Seismic activity KW - Inversion KW - Reservoirs KW - Carbon dioxide KW - Reservoir KW - Stochasticity KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313110093?accountid=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=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Reservoir+Model+Optimization+Using+the+Seismic+Response+to+CO2+Injection+and+Stochastic+Inversion&rft.au=Ramirez%2C+Abelardo&rft.aulast=Ramirez&rft.aufirst=Abelardo&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Application of an Integrated Multiphysics Simulator to Underground Coal Gasification T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313101870; 6167422 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Reid, Charles AU - Nitao, John AU - White, Joshua AU - Burton, Gregory AU - Wagoner, Jeff AU - Camp, David AU - Friedmann, Julio Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Coal KW - Gasification KW - Simulators UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313101870?accountid=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=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Application+of+an+Integrated+Multiphysics+Simulator+to+Underground+Coal+Gasification&rft.au=Reid%2C+Charles%3BNitao%2C+John%3BWhite%2C+Joshua%3BBurton%2C+Gregory%3BWagoner%2C+Jeff%3BCamp%2C+David%3BFriedmann%2C+Julio&rft.aulast=Reid&rft.aufirst=Charles&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Fine-Patterning and Mechanistic Investigations of Al / CuO Composite Films T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313040347; 6166596 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Sullivan, Kyle AU - Kuntz, Joshua AU - Gash, Alex Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Films UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313040347?accountid=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=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Fine-Patterning+and+Mechanistic+Investigations+of+Al+%2F+CuO+Composite+Films&rft.au=Sullivan%2C+Kyle%3BKuntz%2C+Joshua%3BGash%2C+Alex&rft.aulast=Sullivan&rft.aufirst=Kyle&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Modeling of photoacoustic Raman spectroscopy with dissipation T2 - 164th Meeting of the Acoustical Society of America AN - 1313124223; 6196462 JF - 164th Meeting of the Acoustical Society of America AU - Chambers, David AU - Carter, Chance Y1 - 2012/10/22/ PY - 2012 DA - 2012 Oct 22 KW - Raman spectroscopy KW - Photoacoustics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313124223?accountid=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=164th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Modeling+of+photoacoustic+Raman+spectroscopy+with+dissipation&rft.au=Chambers%2C+David%3BCarter%2C+Chance&rft.aulast=Chambers&rft.aufirst=David&rft.date=2012-10-22&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=164th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - http://acousticalsociety.org/sites/default/files/KC_fullweek.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Nanoscale investigation of the association of microbial nitrogen residues with iron (hydr)oxides in a forest soil O-horizon AN - 1244695982; 2013-008474 AB - Amino sugars in fungal cell walls (such as chitin) represent an important source of nitrogen (N) in many forest soil ecosystems. Despite the importance of this material in soil nitrogen cycling, comparatively little is known about abiotic and biotic controls on and the timescale of its turnover. Part of the reason for this lack of information is the inaccessibility of these materials to classic bulk extraction methods. To address this issue, we used advanced visualization tools to examine transformation pathways of chitin-rich fungal cell wall residues as they interact with microorganisms, soil organic matter and mineral surfaces. Our goal was to document initial micro-scale dynamics of the incorporation of (super 13) C- and (super 15) N-labeled chitin into fungi-dominated microenvironments in O-horizons of old-growth forest soils. At the end of a 3-week incubation experiment, high-resolution secondary ion mass spectrometry imaging of hyphae-associated soil microstructures revealed a preferential association of (super 15) N with Fe-rich particles. Synchrotron-based scanning transmission X-ray spectromicroscopy (STXM/NEXAFS) of the same samples showed that thin organic coatings on these soil microstructures are enriched in aliphatic C and amide N on Fe (hydr)oxides, suggesting a concentration of microbial lipids and proteins on these surfaces. A possible explanation for the results of our micro-scale investigation of chemical and spatial patterns is that amide N from chitinous fungal cell walls was assimilated by hyphae-associated bacteria, resynthesized into proteinaceous amide N, and subsequently concentrated onto Fe (hydr)oxide surfaces. If confirmed in other soil ecosystems, such rapid association of microbial N with hydroxylated Fe oxide surfaces may have important implications for mechanistic models of microbial cycling of C and N. Abstract Copyright (2012) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Keiluweit, Marco AU - Bougoure, Jeremy J AU - Zeglin, Lydia H AU - Myrold, David D AU - Weber, Peter K AU - Pett-Ridge, Jennifer AU - Kleber, Markus AU - Nico, Peter S Y1 - 2012/10/15/ PY - 2012 DA - 2012 Oct 15 SP - 213 EP - 226 PB - Elsevier, New York, NY VL - 95 SN - 0016-7037, 0016-7037 KW - forest soils KW - ion probe data KW - lipids KW - isotopes KW - enrichment KW - mass spectra KW - stable isotopes KW - sugars KW - nitrogen KW - carbon KW - oxides KW - carbohydrates KW - spectra KW - horizons KW - chemical composition KW - soils KW - soil profiles KW - N-15/N-14 KW - recycling KW - isotope ratios KW - biochemistry KW - C-13/C-12 KW - iron hydroxides KW - models KW - hydroxides KW - organic compounds KW - biogenic processes KW - bacteria KW - EXAFS data KW - synchrotrons KW - crystal chemistry KW - nanoparticles KW - microorganisms KW - 02D:Isotope geochemistry KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1244695982?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Nanoscale+investigation+of+the+association+of+microbial+nitrogen+residues+with+iron+%28hydr%29oxides+in+a+forest+soil+O-horizon&rft.au=Keiluweit%2C+Marco%3BBougoure%2C+Jeremy+J%3BZeglin%2C+Lydia+H%3BMyrold%2C+David+D%3BWeber%2C+Peter+K%3BPett-Ridge%2C+Jennifer%3BKleber%2C+Markus%3BNico%2C+Peter+S&rft.aulast=Keiluweit&rft.aufirst=Marco&rft.date=2012-10-15&rft.volume=95&rft.issue=&rft.spage=213&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2012.07.001 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 80 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-12-27 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - bacteria; biochemistry; biogenic processes; C-13/C-12; carbohydrates; carbon; chemical composition; crystal chemistry; enrichment; EXAFS data; forest soils; horizons; hydroxides; ion probe data; iron hydroxides; isotope ratios; isotopes; lipids; mass spectra; microorganisms; models; N-15/N-14; nanoparticles; nitrogen; organic compounds; oxides; recycling; soil profiles; soils; spectra; stable isotopes; sugars; synchrotrons DO - http://dx.doi.org/10.1016/j.gca.2012.07.001 ER - TY - JOUR T1 - Evaluation of historical beryllium abundance in soils, airborne particulates and facilities at Lawrence Livermore National Laboratory AN - 1125236367; 17270587 AB - Beryllium has been historically machined, handled and stored in facilities at Lawrence Livermore National Laboratory (LLNL) since the 1950s. Additionally, outdoor testing of beryllium-containing components has been performed at LLNL's Site 300 facility. Beryllium levels in local soils and atmospheric particulates have been measured over three decades and are comparable to those found elsewhere in the natural environment. While localized areas of beryllium contamination have been identified, laboratory operations do not appear to have increased the concentration of beryllium in local air or water. Variation in airborne beryllium correlates to local weather patterns, PM10 levels, normal sources (such as resuspension of soil and emissions from coal power stations) but not to LLNL activities. Regional and national atmospheric beryllium levels have decreased since the implementation of the EPA's 1990 Clean-Air-Act. Multi-element analysis of local soil and air samples allowed for the determination of comparative ratios for beryllium with over 50 other metals to distinguish between natural beryllium and process-induced contamination. Ten comparative elemental markers (Al, Cs, Eu, Gd, La, Nd, Pr, Sm, Th and Tl) that were selected to ensure background variations in other metals did not collectively interfere with the determination of beryllium sources in work-place samples at LLNL. Multi-element analysis and comparative evaluation are recommended for all workplace and environmental samples suspected of beryllium contamination. The multi-element analyses of soils and surface dusts were helpful in differentiating between beryllium of environmental origin and beryllium from laboratory operations. Some surfaces can act as "sinks" for particulate matter, including carpet, which retains entrained insoluble material even after liquid based cleaning. At LLNL, most facility carpets had beryllium concentrations at or below the upper tolerance limit determined by sampling facilities with no history of beryllium work. Some facility carpets had beryllium concentrations above the upper tolerance limits but can be attributed to tracking of local soils, while other facilities showed process-induced contamination from adjacent operations. In selected cases, distinctions were made as to the source of beryllium in carpets. Guidance on the determination of facility beryllium sources is given. JF - Science of the Total Environment AU - Sutton, Mark AU - Bibby, Richard K AU - Eppich, Gary R AU - Lee, Steven AU - Lindvall, Rachel E AU - Wilson, Kent AU - Esser, Bradley K AD - Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94551, USA, sutton18@llnl.gov Y1 - 2012/10/15/ PY - 2012 DA - 2012 Oct 15 SP - 373 EP - 383 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 437 SN - 0048-9697, 0048-9697 KW - Environment Abstracts; Pollution Abstracts; Sustainability Science Abstracts KW - Soil KW - Environmental monitoring KW - Historical account KW - Metals KW - Weather KW - Beryllium KW - Emissions KW - Particulates KW - Coal KW - P 0000:AIR POLLUTION KW - M3 1010:Issues in Sustainable Development KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1125236367?accountid=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=Science+of+the+Total+Environment&rft.atitle=Evaluation+of+historical+beryllium+abundance+in+soils%2C+airborne+particulates+and+facilities+at+Lawrence+Livermore+National+Laboratory&rft.au=Sutton%2C+Mark%3BBibby%2C+Richard+K%3BEppich%2C+Gary+R%3BLee%2C+Steven%3BLindvall%2C+Rachel+E%3BWilson%2C+Kent%3BEsser%2C+Bradley+K&rft.aulast=Sutton&rft.aufirst=Mark&rft.date=2012-10-15&rft.volume=437&rft.issue=&rft.spage=373&rft.isbn=&rft.btitle=&rft.title=Science+of+the+Total+Environment&rft.issn=00489697&rft_id=info:doi/10.1016%2Fj.scitotenv.2012.08.011 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-10-01 N1 - Number of references - 9 N1 - Last updated - 2016-02-29 N1 - SubjectsTermNotLitGenreText - Environmental monitoring; Soil; Weather; Metals; Historical account; Beryllium; Emissions; Coal; Particulates DO - http://dx.doi.org/10.1016/j.scitotenv.2012.08.011 ER - TY - JOUR T1 - The need for new ocean conservation strategies in a high-carbon dioxide world AN - 1727697021; PQ0002148886 AB - The historically unprecedented threats to the marine environment posed by increasing atmospheric carbon dioxide will probably require the use of unconventional, non-passive methods to conserve marine ecosystems. Soliciting such approaches and evaluating their cost, safety and effectiveness must be part of a robust ocean conservation and management plan going forward. JF - Nature Climate Change AU - Rau, Greg H AU - McLeod, Elizabeth L AU - Hoegh-Guldberg, Ove AD - 1] Institute of Marine Sciences, University of California, Santa Cruz, 1150 High Street, Santa Cruz, California 95064, USA [2] Carbon Management Program, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA Y1 - 2012/10// PY - 2012 DA - October 2012 SP - 720 EP - 724 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 2 IS - 10 SN - 1758-678X, 1758-678X KW - Health & Safety Science Abstracts; Environment Abstracts; Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts KW - Historical account KW - Safety KW - Climate change KW - Management plans KW - Marine environment KW - Oceans KW - Conservation KW - Marine ecosystems KW - Carbon dioxide KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development KW - H 0500:General KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1727697021?accountid=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=The+need+for+new+ocean+conservation+strategies+in+a+high-carbon+dioxide+world&rft.au=Rau%2C+Greg+H%3BMcLeod%2C+Elizabeth+L%3BHoegh-Guldberg%2C+Ove&rft.aulast=Rau&rft.aufirst=Greg&rft.date=2012-10-01&rft.volume=2&rft.issue=10&rft.spage=720&rft.isbn=&rft.btitle=&rft.title=Nature+Climate+Change&rft.issn=1758678X&rft_id=info:doi/10.1038%2Fnclimate1555 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-10-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Climate change; Conservation; Marine ecosystems; Carbon dioxide; Historical account; Marine environment; Oceans; Safety; Management plans DO - http://dx.doi.org/10.1038/nclimate1555 ER - TY - JOUR T1 - Exploiting regional amplitude envelopes; a case study for earthquakes and explosions in the Korean Peninsula AN - 1473586092; 2013-003631 AB - We introduce a new method to use narrowband regional amplitude envelopes for event analysis. Building on the success of the coda-wave method, we construct synthetic template envelopes that attempt to fit the entire waveform, including multiple direct phases and their coda, across a broad frequency band. The method makes use of our understanding of earthquake and explosion source models, regional wave propagation, and the relationship between direct amplitudes and their respective codas. We demonstrate the power of the method by examining earthquake and nuclear explosions in the Korean Peninsula at regional distance stations MDJ (Mudangjing, China) and TJN (Taejon, South Korea). In order to implement the method, however, we need to account for propagation through the use of an attenuation model for the region, which we have developed, in addition to an empirical correction to provide for unaccounted effects in the direct-to-coda transfer functions. Under the assumption that our explosion and attenuation models and the empirically obtained P-to-P-coda and S-to-S-coda transfer functions are correct, we determine that the 2006 test by the Democratic People"s Republic of Korea (DPRK) is consistent with a yield between 200 and 800 tons and a depth between 20 and 300 m, with our best fit at 500 tons at a depth of 100 m. Similarly, the 2009 DPRK test is consistent with a yield range of 1-5 kt and a depth range of 70-600 m, with our best fit at 2 kt at a depth of 200 m. JF - Bulletin of the Seismological Society of America AU - Pasyanos, Michael E AU - Walter, William R AU - Mayeda, Kevin M Y1 - 2012/10// PY - 2012 DA - October 2012 SP - 1938 EP - 1948 PB - Seismological Society of America, Berkeley, CA VL - 102 IS - 5 SN - 0037-1106, 0037-1106 KW - Far East KW - explosions KW - elastic waves KW - Korea KW - depth KW - case studies KW - seismicity KW - algorithms KW - nuclear explosions KW - Asia KW - earthquakes KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1473586092?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Exploiting+regional+amplitude+envelopes%3B+a+case+study+for+earthquakes+and+explosions+in+the+Korean+Peninsula&rft.au=Pasyanos%2C+Michael+E%3BWalter%2C+William+R%3BMayeda%2C+Kevin+M&rft.aulast=Pasyanos&rft.aufirst=Michael&rft.date=2012-10-01&rft.volume=102&rft.issue=5&rft.spage=1938&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120120012 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 48 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2014-01-02 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; amplitude; Asia; case studies; depth; earthquakes; elastic waves; explosions; Far East; Korea; nuclear explosions; seismicity DO - http://dx.doi.org/10.1785/0120120012 ER - TY - JOUR T1 - Direct correlation of R-line luminescence with rod-like defect evolution in ion-implanted and annealed silicon AN - 1785233063; PQ0002105522 AB - A quantitative correlation between R-line luminescence at around 1.37 mu m and {311} defect nature, size and concentration has been undertaken in silicon, following keV Si-implantation and subsequent annealing using photoluminescence spectroscopy and plan-view transmission electron microscopy. The formation and evolution of the rod-like defects were found to be dependent on annealing time at a temperature of 700 degree C, but there was no simple correlation found between the density and size of those defects and the R-line intensity. In particular, whereas the presence of {311} defects is essential for observing R-line luminescence, both very small {311} defects at short annealing times and fully developed {311} defects at long annealing times do not contribute to such luminescence. We provide possible explanations for this behavior and suggest that the local (strain) environment around defects, the dopant level and impurities in the silicon substrate may all play a role in determining R-line intensity. JF - MRS Communications AU - Charnvanichborikarn, S AU - Wong-Leung, J AU - Jagadish, C AU - Williams, J S AD - Lawrence Livermore National Laboratory, Livermore, California 94550; Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia, charnvanichb1@llnl.gov Y1 - 2012/09// PY - 2012 DA - September 2012 SP - 101 EP - 105 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 2 IS - 3 SN - 2159-6859, 2159-6859 KW - Biotechnology and Bioengineering Abstracts KW - Temperature effects KW - Silicon KW - Photons KW - Transmission electron microscopy KW - Impurities KW - Spectroscopy KW - Luminescence KW - Evolution KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1785233063?accountid=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=MRS+Communications&rft.atitle=Direct+correlation+of+R-line+luminescence+with+rod-like+defect+evolution+in+ion-implanted+and+annealed+silicon&rft.au=Charnvanichborikarn%2C+S%3BWong-Leung%2C+J%3BJagadish%2C+C%3BWilliams%2C+J+S&rft.aulast=Charnvanichborikarn&rft.aufirst=S&rft.date=2012-09-01&rft.volume=2&rft.issue=3&rft.spage=101&rft.isbn=&rft.btitle=&rft.title=MRS+Communications&rft.issn=21596859&rft_id=info:doi/10.1557%2Fmrc.2012.17 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Number of references - 29 N1 - Last updated - 2016-05-12 N1 - SubjectsTermNotLitGenreText - Temperature effects; Silicon; Photons; Transmission electron microscopy; Impurities; Spectroscopy; Luminescence; Evolution DO - http://dx.doi.org/10.1557/mrc.2012.17 ER - TY - JOUR T1 - Old-growth CO2 flux measurements reveal high sensitivity to climate anomalies across seasonal, annual and decadal time scales AN - 1020842511; 16792160 AB - The traditional hypothesis that old-growth forests are carbon neutral is under debate as recent studies show evidence of net carbon sequestration. Here, we present a decade (1998-2008) of carbon dioxide, water and energy fluxes from an old-growth stand in the American Pacific Northwest to identify ecosystem-level responses to climate variability, including teleconnection patterns. This study provides the longest, continuous record of old-growth eddy flux data to date. From 1998 to 2008, average annual net ecosystem exchange (FNEE) was -49 plus or minus 40gCm-2yr-1(a small net carbon sink) while interannual variability was high ( similar to 300gCm-2yr-1) and indicated that the stand is able to switch from net carbon sink to source in response to climate forcing. Seasonal and annual FNEE variability was strongly linked to climate anomalies associated with major teleconnections and the subsequent responses of driving mechanisms (e.g., water use efficiency, light use efficiency, canopy conductance) to local weather (e.g., cloudiness). Biometric measurements of aboveground net primary productivity (FANPP) provided a similar to 60 year record of growth, recruitment, and mortality responses to a longer range of climatic conditions, including shifts in the Pacific Decadal Oscillation (PDO). A negative trend in FANPP generally matched the warm PDO phase shift starting in 1977. As climate models predict future warming in the Pacific Northwest, our results suggest that any perturbations towards a warmer, drier state, such as would occur during positive climate phases, may have significant impacts on regional terrestrial carbon budgets through increasing respiration without subsequent, offsetting increases in carbon assimilation in these old-growth forests. JF - Agricultural and Forest Meteorology AU - Wharton, S AU - Falk, M AU - Bible, K AU - Schroeder, M AU - Paw U, KT AD - Atmospheric, Earth and Energy Division, Lawrence Livermore National Laboratory, Livermore, CA, United States, wharton4@llnl.gov Y1 - 2012/08/15/ PY - 2012 DA - 2012 Aug 15 SP - 1 EP - 14 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 161 SN - 0168-1923, 0168-1923 KW - Water Resources Abstracts; Aqualine Abstracts; Meteorological & Geoastrophysical Abstracts KW - FLUXNET KW - Net ecosystem exchange KW - CO2 flux KW - Teleconnections KW - PDO KW - ENSO KW - Interannual variability KW - Long-term fluxes KW - Variability KW - Sinks KW - Primary production KW - Data assimilation KW - Climatic conditions KW - INE, USA, Pacific Northwest KW - Carbon KW - Water vapor flux over forests KW - I, Pacific KW - Canopy KW - Weather KW - Mortality KW - Climates KW - Pacific Decadal Oscillation KW - Carbon dioxide flux above forests KW - Carbon sinks KW - Carbon dioxide KW - Fluctuations KW - Carbon Dioxide KW - AQ 00001:Water Resources and Supplies KW - SW 0810:General KW - M2 551.586:Biometeorology and Bioclimatology (551.586) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1020842511?accountid=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=Old-growth+CO2+flux+measurements+reveal+high+sensitivity+to+climate+anomalies+across+seasonal%2C+annual+and+decadal+time+scales&rft.au=Wharton%2C+S%3BFalk%2C+M%3BBible%2C+K%3BSchroeder%2C+M%3BPaw+U%2C+KT&rft.aulast=Wharton&rft.aufirst=S&rft.date=2012-08-15&rft.volume=161&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Agricultural+and+Forest+Meteorology&rft.issn=01681923&rft_id=info:doi/10.1016%2Fj.agrformet.2012.03.007 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-06-01 N1 - Last updated - 2016-08-17 N1 - SubjectsTermNotLitGenreText - Water vapor flux over forests; Carbon dioxide; Carbon sinks; Carbon dioxide flux above forests; Pacific Decadal Oscillation; Climatic conditions; Data assimilation; Primary production; Teleconnections; Mortality; Weather; Variability; Carbon; Climates; Sinks; Fluctuations; Canopy; Carbon Dioxide; I, Pacific; INE, USA, Pacific Northwest DO - http://dx.doi.org/10.1016/j.agrformet.2012.03.007 ER - TY - CPAPER T1 - Forest carbon cycling: Insights gained from radiocarbon measurements T2 - 97th Annual Meeting of the Ecological Society of America (ESA 2012) AN - 1313109257; 6153597 JF - 97th Annual Meeting of the Ecological Society of America (ESA 2012) AU - Phillips, Claire Y1 - 2012/08/05/ PY - 2012 DA - 2012 Aug 05 KW - Forests KW - Carbon cycle UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313109257?accountid=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=97th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2012%29&rft.atitle=Forest+carbon+cycling%3A+Insights+gained+from+radiocarbon+measurements&rft.au=Phillips%2C+Claire&rft.aulast=Phillips&rft.aufirst=Claire&rft.date=2012-08-05&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=97th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://eco.confex.com/eco/2012/webprogrampreliminary/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Explosion shear-wave generation in low-velocity source media AN - 1270039186; 2013-009290 AB - This paper investigates which mechanism of Lg generation dominates in low-velocity source media, which is important because of the central role of Lg in discrimination and yield estimation of nuclear explosions. The mechanisms investigated are surface P-to-S conversion (pS), generation directly by the nonspherical component of the explosion source volume, and Rg-to-S scattering. We identify and quantify observations that distinguish between mechanisms. We also specifically test the assumptions of previous work that concluded that Rg scattering is the dominant mechanism. To do so, we analyze and simulate records of adjacent, normally buried and overburied Nevada test site (NTS) explosions, and analyze deep seismic sounding (DSS) explosion Quartz 3 data. The data analyses and simulations consistently indicate that pS is the dominant source of explosion Lg in low-velocity source media, that nonspherical source components could also contribute significantly to Lg, and that scattered Rg contributes less, except possibly at very low frequencies. For NTS overburied versus normally buried explosions, we compare Lg-to-Pg spectral ratios, corner frequencies, and tangential versus vertical and radial Lg spectral nulls. We perform simulations for the NTS to compare the contributions to Lg of pS, direct S from a CLVD, and scattered Rg. Quartz 3 data show that Rg spectral nulls vary with azimuth and differ from corresponding Sg and Lg spectral nulls, counter to assumptions required by the Rg scattering hypothesis. JF - Bulletin of the Seismological Society of America AU - Baker, G Eli AU - Stevens, Jeffry L AU - Xu, Heming Y1 - 2012/08// PY - 2012 DA - August 2012 SP - 1320 EP - 1334 PB - Seismological Society of America, Berkeley, CA VL - 102 IS - 4 SN - 0037-1106, 0037-1106 KW - United States KW - body waves KW - discriminant analysis KW - guided waves KW - explosions KW - statistical analysis KW - Lg-waves KW - elastic waves KW - short-period waves KW - simulation KW - Rayleigh waves KW - Pg-waves KW - Nevada Test Site KW - surface waves KW - Lg/Pg ratios KW - Yucca Flat KW - Rg-waves KW - propagation 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/1270039186?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Explosion+shear-wave+generation+in+low-velocity+source+media&rft.au=Baker%2C+G+Eli%3BStevens%2C+Jeffry+L%3BXu%2C+Heming&rft.aulast=Baker&rft.aufirst=G&rft.date=2012-08-01&rft.volume=102&rft.issue=4&rft.spage=1320&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120110165 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 27 N1 - PubXState - CA N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2013-01-17 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - body waves; discriminant analysis; earthquakes; elastic waves; explosions; guided waves; Lg-waves; Lg/Pg ratios; Nevada; Nevada Test Site; nuclear explosions; Pg-waves; propagation; Rayleigh waves; Rg-waves; S-waves; seismic waves; short-period waves; simulation; statistical analysis; surface waves; United States; Yucca Flat DO - http://dx.doi.org/10.1785/0120110165 ER - TY - JOUR T1 - Explosion shear-wave generation in high-velocity source media AN - 1270039173; 2013-009289 AB - We evaluate the mechanisms responsible for generation of shear waves by explosions in high-velocity source media by identifying, quantifying, and modeling observations that can distinguish between commonly suggested mechanisms. We review the literature to identify regional observations that have been or can be used to distinguish between two or more mechanisms. We supplement these historical observations with new measurements of the Semipalatinsk test site (STS) event Lg and P amplitudes at Borovoye and model the observations with nonlinear source models, Rg-to-Lg upper bound calculations, and wavenumber integration synthetic seismograms for point explosions and CLVDs. Direct generation of shear waves by the nonspherical component of the source volume is consistent with the regional Lg amplitude versus yield relationship, while S (super *) and Rg-to-Lg scattering are not. We also analyze and model a large set of Degelen explosion records from approximately 10 to 90 km. The local Sg spectral corner frequency is lower than the Pg corner frequency by approximately the source P-to-S velocity ratio, which is consistent with shear waves directly generated by the source, and inconsistent with Sg being the result of pS, S (super *) , or Rg-to-Lg scattering. The local Sg and Rg spectra are distinctly different. Taken together, results from previous work and new observations presented here support the conclusion that explosions in high-velocity source media dominantly generate shear waves directly, through the nonspherical part of the nonlinearly deforming source volume. JF - Bulletin of the Seismological Society of America AU - Baker, G Eli AU - Stevens, Jeffry L AU - Xu, Heming Y1 - 2012/08// PY - 2012 DA - August 2012 SP - 1301 EP - 1319 PB - Seismological Society of America, Berkeley, CA VL - 102 IS - 4 SN - 0037-1106, 0037-1106 KW - P-waves KW - Lg-waves KW - elastic waves KW - short-period waves KW - Central Asia KW - surface waves KW - Commonwealth of Independent States KW - velocity KW - Rg-waves KW - propagation KW - nuclear explosions KW - Asia KW - seismograms KW - body waves KW - discriminant analysis KW - guided waves KW - explosions KW - statistical analysis KW - prediction KW - Rayleigh waves KW - Semipalatinsk Kazakhstan KW - velocity structure KW - Kazakhstan KW - seismic waves KW - S-waves KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270039173?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Explosion+shear-wave+generation+in+high-velocity+source+media&rft.au=Baker%2C+G+Eli%3BStevens%2C+Jeffry+L%3BXu%2C+Heming&rft.aulast=Baker&rft.aufirst=G&rft.date=2012-08-01&rft.volume=102&rft.issue=4&rft.spage=1301&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120110119 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 62 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2013-04-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - amplitude; Asia; body waves; Central Asia; Commonwealth of Independent States; discriminant analysis; elastic waves; explosions; guided waves; Kazakhstan; Lg-waves; nuclear explosions; P-waves; prediction; propagation; Rayleigh waves; Rg-waves; S-waves; seismic waves; seismograms; Semipalatinsk Kazakhstan; short-period waves; statistical analysis; surface waves; velocity; velocity structure DO - http://dx.doi.org/10.1785/0120110119 ER - TY - JOUR T1 - STANDING UP THE RADIATION PROTECTION PROGRAM AT THE NATIONAL IGNITION FACILITY AN - 1171872166; 16966811 AB - Operation of the NIF requires a large and varied number of routine and infrequent activities involving contaminated and radioactive systems, both in servicing on-line equipment and off-line refurbishment of components. Routine radiological operations include: up to several dozen entries into contaminated systems per day, multiple laboratories refurbishing radiologically impacted parts, handling of tens of curies of tritium, and (eventually) tens of workers spending most of their day working in radiation areas and handling moderately activated parts. Prior to the introduction of radioactive materials and neutron producing experiments (capable of causing activation), very few of the operating staff had any radiological qualifications or experience. To support the full NIF operating program, over 600 radiological workers needed to be trained and a functional and large-scale radiological protection program needed to be put in place. It quickly became evident that there was a need to supplement the LLNL site radiological protection staff with additional radiological controls technicians and a radiological protection staff within NIF operations to manage day-to-day activities. This presentation discusses the approach taken to stand up the radiological protection program and some lessons learned. JF - Health Physics AU - Kohut, T AU - Beale, R AU - Dillon, J AU - Thacker, R AD - Lawrence Livermore National Laboratory (LLNL), Livermore, CA 94551-9900, USA Y1 - 2012/08// PY - 2012 DA - Aug 2012 SP - 1 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 103 IS - 2 SN - 0017-9078, 0017-9078 KW - Pollution Abstracts KW - Tritium KW - Radioactive materials KW - Technicians KW - technicians KW - P 8000:RADIATION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1171872166?accountid=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=Health+Physics&rft.atitle=STANDING+UP+THE+RADIATION+PROTECTION+PROGRAM+AT+THE+NATIONAL+IGNITION+FACILITY&rft.au=Kohut%2C+T%3BBeale%2C+R%3BDillon%2C+J%3BThacker%2C+R&rft.aulast=Kohut&rft.aufirst=T&rft.date=2012-08-01&rft.volume=103&rft.issue=2&rft.spage=S61&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 - 2012-11-01 N1 - Last updated - 2013-08-12 N1 - SubjectsTermNotLitGenreText - Tritium; Radioactive materials; Technicians; technicians ER - TY - JOUR T1 - A RISK-BASED RADIATION SAFETY PROGRAM FOR RADIATION-GENERATING DEVICES (RGDS) AN - 1032889492; 16966753 AB - With regards to radiation-generating devices (RGDs), national guidance and federal requirements are based on specific types of RGDs (e.g., "cabinet x-ray machines," "analytical x-ray devices," "open beam radiography devices," and "accelerators"). LLNL has some uncommon RGDs not covered by existing guidance (e.g., focused high-powered lasers, evacuated high-voltage electronic devices), as well as RGDs for which the traditional controls are not appropriate (e.g., for "accelerators" that can safely be operated in an occupied area). We needed a comprehensive approach to RGD safety that was observant of the requirements while being simple, sensible and comprehensive. Accordingly, we developed a safety-focused, risk-based classification scheme for control of RGDs. The classification scheme is based on the RGD's potential accidental radiation dose. Each RGD is assigned to one of four classes, and the RGD Class determines the level of physical and administrative controls. Similarly, we developed a risk-based approach that could be used for determining when a Safety Analysis Document might be appropriate. In this presentation, we will discuss these risk-based classification schemes and their application at Lawrence Livermore National Laboratory. JF - Health Physics AU - Shingleton, K AU - Sundsmo, T AU - Bastian, C AD - Lawrence Livermore National Laboratory (LLNL), Livermore, CA 94551-9900, USA Y1 - 2012/08// PY - 2012 DA - Aug 2012 SP - 1 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 103 IS - 2 SN - 0017-9078, 0017-9078 KW - Risk Abstracts; Health & Safety Science Abstracts KW - Classification KW - Lasers KW - Radiography KW - H 8000:Radiation Safety/Electrical Safety KW - R2 23020:Technological risks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1032889492?accountid=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=Health+Physics&rft.atitle=A+RISK-BASED+RADIATION+SAFETY+PROGRAM+FOR+RADIATION-GENERATING+DEVICES+%28RGDS%29&rft.au=Shingleton%2C+K%3BSundsmo%2C+T%3BBastian%2C+C&rft.aulast=Shingleton&rft.aufirst=K&rft.date=2012-08-01&rft.volume=103&rft.issue=2&rft.spage=S38&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 - 2012-08-01 N1 - Last updated - 2013-08-12 N1 - SubjectsTermNotLitGenreText - Classification; Lasers; Radiography ER - TY - JOUR T1 - A 9170-year record of decadal-to-multi-centennial scale pluvial episodes from the coastal Southwest United States; a role for atmospheric rivers? AN - 1112671232; 2012-091857 AB - A well-dated, 9170 calendar year before present (cal yr BP) paleohydrologic reconstruction is presented from Lower Bear Lake in the San Bernardino Mountains of the coastal southwest United States. This new multi-proxy record is characterized by alternating organic-rich/carbonate-rich sediment units, interpreted to reflect hydrologically-forced changes in the lake's depositional environment. Our interpretation of the proxy data indicates nine decadal-to-multi-centennial pluvial episodes (PE) over the past 9170 cal yr BP. Of these nine inferred pluvials, five are interpreted as more pronounced based on their combined proxy interpretations: (PE-V) 9170?-8250, (PE-IV) 7000-6400, (PE-III) 3350-3000, (PE-II) 850-700, and (PE-I) 500-476 (top of core) cal yr BP. The Lower Bear Lake record indicates that the San Bernardino Mountains, source region for the Mojave River and its terminal playa, was wet during the same periods (within dating errors), to several of the major pluvials proposed from the lakes in the sink of the Mojave River. Our comparison extends north also to Tulare Lake, which drains the southcentral-western Sierra Nevada Mountains. This temporally and spatially coherent signal indicates that a similar climate forcing acted to increase regional wetness at various times during the past 9170 cal yr BP. As originally proposed by Enzel, Ely, and colleagues (e.g., Enzel et al., 1989; Enzel, 1992; Ely et al., 1994; Enzel and Wells, 1997), we too contend that Holocene pluvial episodes are associated with changing the frequency of large winter storms that track across a broad region at decadal-to-multi-centennial timescales. We build upon their hypothesis through the addition of new and better-dated site comparisons, recent advances in the understanding of atmospheric rivers, and improved knowledge of the ocean-atmosphere dynamics that caused the early 20th century western United States pluvial. Abstract Copyright (2012) Elsevier, B.V. JF - Quaternary Science Reviews AU - Kirby, Matthew E AU - Zimmerman, Susan R H AU - Patterson, William P AU - Rivera, Jose J Y1 - 2012/07/16/ PY - 2012 DA - 2012 Jul 16 SP - 57 EP - 65 PB - Elsevier VL - 46 SN - 0277-3791, 0277-3791 KW - United States KW - lithostratigraphy KW - Quaternary KW - isotopes KW - chronostratigraphy KW - paleoclimatology KW - Holocene KW - cores KW - Cenozoic KW - California KW - radioactive isotopes KW - dates KW - carbon KW - sediments KW - lacustrine environment KW - absolute age KW - San Bernardino Mountains KW - Lower Bear Lake KW - C-14 KW - San Bernardino County California KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1112671232?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+9170-year+record+of+decadal-to-multi-centennial+scale+pluvial+episodes+from+the+coastal+Southwest+United+States%3B+a+role+for+atmospheric+rivers%3F&rft.au=Kirby%2C+Matthew+E%3BZimmerman%2C+Susan+R+H%3BPatterson%2C+William+P%3BRivera%2C+Jose+J&rft.aulast=Kirby&rft.aufirst=Matthew&rft.date=2012-07-16&rft.volume=46&rft.issue=&rft.spage=57&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2Fj.quascirev.2012.05.008 L2 - http://www.sciencedirect.com/science/journal/02773791 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 63 N1 - Document feature - illus. incl. 2 tables, sketch map N1 - Last updated - 2012-10-18 N1 - SubjectsTermNotLitGenreText - absolute age; C-14; California; carbon; Cenozoic; chronostratigraphy; cores; dates; Holocene; isotopes; lacustrine environment; lake sediments; lithostratigraphy; Lower Bear Lake; paleoclimatology; Quaternary; radioactive isotopes; San Bernardino County California; San Bernardino Mountains; sediments; United States DO - http://dx.doi.org/10.1016/j.quascirev.2012.05.008 ER - TY - JOUR T1 - Simeio; an ultra Ni-poor metal particle from comet 81P/Wild2 AN - 1849307209; 2016-107643 JF - Meteoritics & Planetary Science AU - Westphal, A J AU - Gainsforth, Z AU - Goldstein, J I AU - Humayun, M AU - Kunz, M AU - Marcus, M A AU - Stroud, Rhonda M AU - Tamura, N AU - Anonymous Y1 - 2012/07// PY - 2012 DA - July 2012 EP - Abstract no. 5309 PB - Meteoritical Society, Fayetteville, AR VL - 47, Suppl. SN - 1086-9379, 1086-9379 KW - synchrotron X-ray microprobe KW - cobalt KW - X-ray diffraction data KW - Stardust Mission KW - chromite KW - kamacite KW - interplanetary dust KW - X-ray spectra KW - iron KW - XANES spectra KW - cosmic dust KW - comets KW - metals KW - nickel KW - Wild 2 Comet KW - oxides KW - alloys KW - spectra KW - trace elements KW - particles KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849307209?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Simeio%3B+an+ultra+Ni-poor+metal+particle+from+comet+81P%2FWild2&rft.au=Westphal%2C+A+J%3BGainsforth%2C+Z%3BGoldstein%2C+J+I%3BHumayun%2C+M%3BKunz%2C+M%3BMarcus%2C+M+A%3BStroud%2C+Rhonda+M%3BTamura%2C+N%3BAnonymous&rft.aulast=Westphal&rft.aufirst=A&rft.date=2012-07-01&rft.volume=47%2C+Suppl.&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/metsoc2012/pdf/5309.pdf http://cavern.uark.edu/~meteor/ LA - English DB - GeoRef N1 - Conference title - 75th annual meeting of the Meteorological Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 8 N1 - PubXState - AR N1 - SuppNotes - Accessed on Jan. 25, 2016 N1 - Last updated - 2016-12-16 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - alloys; chromite; cobalt; comets; cosmic dust; interplanetary dust; iron; kamacite; metals; nickel; oxides; particles; spectra; Stardust Mission; synchrotron X-ray microprobe; trace elements; Wild 2 Comet; X-ray diffraction data; X-ray spectra; XANES spectra ER - TY - JOUR T1 - Complexities of focused ion beam preparation of electron-transparent sections for meteorite studies AN - 1849297378; 2016-104445 JF - Meteoritics & Planetary Science AU - Ishii, Hope A AU - Bradley, J P AU - Teslich, N AU - Anonymous Y1 - 2012/07// PY - 2012 DA - July 2012 EP - Abstract no. 5339 PB - Meteoritical Society, Fayetteville, AR VL - 47, Suppl. SN - 1086-9379, 1086-9379 KW - methods KW - meteorites KW - sample preparation KW - focused ion beam method KW - amorphous materials KW - microstructure KW - electron microscopy data KW - thin sections KW - electron microscopy KW - TEM data KW - SEM data KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849297378?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Complexities+of+focused+ion+beam+preparation+of+electron-transparent+sections+for+meteorite+studies&rft.au=Ishii%2C+Hope+A%3BBradley%2C+J+P%3BTeslich%2C+N%3BAnonymous&rft.aulast=Ishii&rft.aufirst=Hope&rft.date=2012-07-01&rft.volume=47%2C+Suppl.&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/ L2 - www.lpi.usra.edu/meetings/metsoc2012/pdf/5339.pdf http://cavern.uark.edu/~meteor/ LA - English DB - GeoRef N1 - Conference title - 75th annual meeting of the Meteorological Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - AR N1 - SuppNotes - Accessed on Dec. 22, 2015 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - amorphous materials; electron microscopy; electron microscopy data; focused ion beam method; meteorites; methods; microstructure; sample preparation; SEM data; TEM data; thin sections ER - TY - JOUR T1 - Human-induced global ocean warming on multidecadal timescales AN - 1034819072; 16980324 AB - Large-scale increases in upper-ocean temperatures are evident in observational records. Several studies have used well-established detection and attribution methods to demonstrate that the observed basin-scale temperature changes are consistent with model responses to anthropogenic forcing and inconsistent with model-based estimates of natural variability. These studies relied on a single observational data set and employed results from only one or two models. Recent identification of systematic instrumental biases in expendable bathythermograph data has led to improved estimates of ocean temperature variability and trends and provide motivation to revisit earlier detection and attribution studies. We examine the causes of ocean warming using these improved observational estimates, together with results from a large multimodel archive of externally forced and unforced simulations. The time evolution of upper ocean temperature changes in the newer observational estimates is similar to that of the multimodel average of simulations that include the effects of volcanic eruptions. Our detection and attribution analysis systematically examines the sensitivity of results to a variety of model and data-processing choices. When global mean changes are included, we consistently obtain a positive identification (at the 1% significance level) of an anthropogenic fingerprint in observed upper-ocean temperature changes, thereby substantially strengthening existing detection and attribution evidence. JF - Nature Climate Change AU - Gleckler, P J AU - Santer, B D AU - Domingues, C M AU - Pierce, D W AU - Barnett, T P AU - Church, JA AU - Taylor, KE AU - AchutaRao, K M AU - Boyer, T P AU - Ishii, M AU - Caldwell, P M AD - Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Mail Code L-103, 7000 East Avenue, Livermore, California 94550, USA Y1 - 2012/07// PY - 2012 DA - July 2012 SP - 524 EP - 529 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 2 IS - 7 SN - 1758-678X, 1758-678X KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts; Sustainability Science Abstracts KW - Temperature changes KW - Climate models KW - Ocean temperature variability KW - Climate change KW - Temperature KW - Anthropogenic factors KW - Volcanoes KW - Natural variability KW - Simulation KW - Volcanic eruption KW - Expendable bathythermographs KW - Ocean temperature KW - Ocean warming KW - Numerical simulations KW - Oceans KW - Temperature trends KW - Human factors KW - upper ocean KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development KW - ENA 12:Oceans & Estuaries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1034819072?accountid=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=Human-induced+global+ocean+warming+on+multidecadal+timescales&rft.au=Gleckler%2C+P+J%3BSanter%2C+B+D%3BDomingues%2C+C+M%3BPierce%2C+D+W%3BBarnett%2C+T+P%3BChurch%2C+JA%3BTaylor%2C+KE%3BAchutaRao%2C+K+M%3BBoyer%2C+T+P%3BIshii%2C+M%3BCaldwell%2C+P+M&rft.aulast=Gleckler&rft.aufirst=P&rft.date=2012-07-01&rft.volume=2&rft.issue=7&rft.spage=524&rft.isbn=&rft.btitle=&rft.title=Nature+Climate+Change&rft.issn=1758678X&rft_id=info:doi/10.1038%2Fnclimate1553 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-08-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Expendable bathythermographs; Temperature changes; Ocean temperature variability; Ocean warming; Climate models; Numerical simulations; Natural variability; Temperature trends; Volcanic eruption; Ocean temperature; Oceans; Climate change; Volcanoes; Anthropogenic factors; Temperature; Simulation; Human factors; upper ocean DO - http://dx.doi.org/10.1038/nclimate1553 ER - TY - CPAPER T1 - Aerosol test particles with DNA barcodes T2 - 67th American Chemical Society Northwest Regional Meeting (NORM 2012) AN - 1313087173; 6146014 JF - 67th American Chemical Society Northwest Regional Meeting (NORM 2012) AU - Udey, Ruth AU - Wheeler, Elizabeth AU - Baker, Brian AU - Jones, A AU - Farquar, George Y1 - 2012/06/24/ PY - 2012 DA - 2012 Jun 24 KW - Particulates KW - Aerosols UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313087173?accountid=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=67th+American+Chemical+Society+Northwest+Regional+Meeting+%28NORM+2012%29&rft.atitle=Aerosol+test+particles+with+DNA+barcodes&rft.au=Udey%2C+Ruth%3BWheeler%2C+Elizabeth%3BBaker%2C+Brian%3BJones%2C+A%3BFarquar%2C+George&rft.aulast=Udey&rft.aufirst=Ruth&rft.date=2012-06-24&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=67th+American+Chemical+Society+Northwest+Regional+Meeting+%28NORM+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://www.snakeriveracs.com/Norm%202012/Final%20Full__NORM%202012_web.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Optimal mass configurations for lensing high-redshift galaxies AN - 1143511389; 649541-27 AB - We investigate the gravitational lensing properties of lines of sight containing multiple cluster-scale halos, motivated by their ability to lens very high redshift (z approximately 10) sources into detectability. We control for the total mass along the line of sight, isolating the effects of distributing the mass among multiple halos and of varying the physical properties of the halos. Our results show that multiple-halo lines of sight can increase the magnified source-plane region compared to the single cluster lenses typically targeted for lensing studies and thus are generally better fields for detecting very high redshift sources. The configurations that result in optimal lensing cross sections benefit from interactions between the lens potentials of the halos when they overlap somewhat on the sky, creating regions of high magnification in the source plane not present when the halos are considered individually. The effect of these interactions on the lensing cross section can even be comparable to changing the total mass of the lens from 10 (super 15) M (sub �) to 3 X 10 (super 15) M (sub �) . The gain in lensing cross section increases as the mass is split into more halos, provided that the lens potentials are projected close enough to interact with each other. A nonzero projected halo angular separation, equal halo mass ratio, and high projected halo concentration are the best mass configurations, whereas projected halo ellipticity, halo triaxiality, and the relative orientations of the halos are less important. Such high-mass, multiple-halo lines of sight exist in the Sloan Digital Sky Survey. Copyright (Copyright) 2012. The American Astronomical Society. All rights reserved. JF - The = Astrophysical Journal AU - Wong, Kenneth C AU - Ammons, S Mark AU - Keeton, Charles R AU - Zabludoff, Ann I Y1 - 2012/06/20/ PY - 2012 DA - 2012 Jun 20 PB - University of Chicago Press for the American Astronomical Society, Chicago, IL VL - 752 IS - 2 SN - 0004-637X, 0004-637X UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1143511389?accountid=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=The+%3D+Astrophysical+Journal&rft.atitle=Optimal+mass+configurations+for+lensing+high-redshift+galaxies&rft.au=Wong%2C+Kenneth+C%3BAmmons%2C+S+Mark%3BKeeton%2C+Charles+R%3BZabludoff%2C+Ann+I&rft.aulast=Wong&rft.aufirst=Kenneth&rft.date=2012-06-20&rft.volume=752&rft.issue=2&rft.spage=104+%2821pp%29&rft.isbn=&rft.btitle=&rft.title=The+%3D+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F752%2F2%2F104 L2 - http://iopscience.iop.org/0004-637X 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 IOP Publishing Ltd., London, United Kingdom N1 - PubXState - IL N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1088/0004-637X/752/2/104 ER - TY - JOUR T1 - A possible binary system of a stellar remnant in the high-magnification gravitational microlensing event ogle-2007-blg-514 AN - 1143500448; 649541-5 AB - We report the extremely high-magnification (A > 1000) binary microlensing event OGLE-2007-BLG-514. We obtained good coverage around the double peak structure in the light curve via follow-up observations from different observatories. The binary lens model that includes the effects of parallax (known orbital motion of the Earth) and orbital motion of the lens yields a binary lens mass ratio of q = 0.321 + or - 0.007 and a projected separation of s = 0.072 + or - 0.001 in units of the Einstein radius. The parallax parameters allow us to determine the lens distance D (sub L) = 3.11 + or - 0.39 kpc and total mass M (sub L) = 1.40 + or - 0.18 M (sub �) ; this leads to the primary and secondary components having masses of M (sub 1) = 1.06 + or - 0.13 M (sub �) and M (sub 2) = 0.34 + or - 0.04 M (sub �) , respectively. The parallax model indicates that the binary lens system is likely constructed by the main-sequence stars. On the other hand, we used a Bayesian analysis to estimate probability distributions by the model that includes the effects of xallarap (possible orbital motion of the source around a companion) and parallax (q = 0.270 + or - 0.005, s = 0.083 + or - 0.001). The primary component of the binary lens is relatively massive, with M (sub 1) = 0.9 (super +4.6) (sub -0.3) M (sub �) and it is at a distance of D (sub L) = 2.6 (super +3.8) (sub -0.9) kpc. Given the secure mass ratio measurement, the companion mass is therefore M (sub 2) = 0.2 (super +1.2) (sub -0.1) M (sub �) . The xallarap model implies that the primary lens is likely a stellar remnant, such as a white dwarf, a neutron star, or a black hole. Copyright (Copyright) 2012. The American Astronomical Society. All rights reserved. JF - The = Astrophysical Journal AU - Miyake, N AU - Udalski, A AU - Sumi, T AU - Bennett, D P AU - Dong, S AU - Street, R A AU - Greenhill, J AU - Bond, I A AU - Gould, A AU - Kubiak, M AU - Szyma�ski, M K AU - Pietrzy�ski, G AU - Soszy�ski, I AU - Ulaczyk, K AU - Wyrzykowski, L AU - Abe, F AU - Fukui, A AU - Furusawa, K AU - Holderness, S AU - Itow, Y AU - Korpela, A AU - Ling, C H AU - Masuda, K AU - Matsubara, Y AU - Muraki, Y AU - Nagayama, T AU - Ohnishi, K AU - Rattenbury, N AU - Saito, To AU - Sako, T AU - Sullivan, D J AU - Sweatman, W L AU - Tristram, P J AU - Yock, P C M AU - Allen, W AU - Christie, G W AU - DePoy, D L AU - Gaudi, B S AU - Han, C AU - Lee, C-U AU - McCormick, J AU - Monard, B AU - Natusch, T AU - Park, B-G AU - Pogge, R W AU - Allan, A AU - Bode, M AU - Bramich, D M AU - Clay, N AU - Dominik, M AU - Horne, K D AU - Kains, N AU - Mottram, C AU - Snodgrass, C AU - Steele, I AU - Tsapras, Y AU - Albrow, M D AU - Batista, V AU - Beaulieu, J P AU - Brillant, S AU - Burgdorf, M AU - Caldwell, J A R AU - Cassan, A AU - Cole, A AU - Cook, K H AU - Coutures, Ch AU - Dieters, S AU - Prester, D Dominis AU - Donatowicz, J AU - Fouque, P AU - Jorgensen, U G AU - Kane, S AU - Kubas, D AU - Marquette, J B AU - Martin, R AU - Menzies, J AU - Pollard, K R AU - Sahu, K C AU - Wambsganss, J AU - Williams, A AU - Zub, M Y1 - 2012/06/20/ PY - 2012 DA - 2012 Jun 20 PB - University of Chicago Press for the American Astronomical Society, Chicago, IL VL - 752 IS - 2 SN - 0004-637X, 0004-637X UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1143500448?accountid=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=The+%3D+Astrophysical+Journal&rft.atitle=A+possible+binary+system+of+a+stellar+remnant+in+the+high-magnification+gravitational+microlensing+event+ogle-2007-blg-514&rft.au=Miyake%2C+N%3BUdalski%2C+A%3BSumi%2C+T%3BBennett%2C+D+P%3BDong%2C+S%3BStreet%2C+R+A%3BGreenhill%2C+J%3BBond%2C+I+A%3BGould%2C+A%3BKubiak%2C+M%3BSzyma%EF%BF%BDski%2C+M+K%3BPietrzy%EF%BF%BDski%2C+G%3BSoszy%EF%BF%BDski%2C+I%3BUlaczyk%2C+K%3BWyrzykowski%2C+L%3BAbe%2C+F%3BFukui%2C+A%3BFurusawa%2C+K%3BHolderness%2C+S%3BItow%2C+Y%3BKorpela%2C+A%3BLing%2C+C+H%3BMasuda%2C+K%3BMatsubara%2C+Y%3BMuraki%2C+Y%3BNagayama%2C+T%3BOhnishi%2C+K%3BRattenbury%2C+N%3BSaito%2C+To%3BSako%2C+T%3BSullivan%2C+D+J%3BSweatman%2C+W+L%3BTristram%2C+P+J%3BYock%2C+P+C+M%3BAllen%2C+W%3BChristie%2C+G+W%3BDePoy%2C+D+L%3BGaudi%2C+B+S%3BHan%2C+C%3BLee%2C+C-U%3BMcCormick%2C+J%3BMonard%2C+B%3BNatusch%2C+T%3BPark%2C+B-G%3BPogge%2C+R+W%3BAllan%2C+A%3BBode%2C+M%3BBramich%2C+D+M%3BClay%2C+N%3BDominik%2C+M%3BHorne%2C+K+D%3BKains%2C+N%3BMottram%2C+C%3BSnodgrass%2C+C%3BSteele%2C+I%3BTsapras%2C+Y%3BAlbrow%2C+M+D%3BBatista%2C+V%3BBeaulieu%2C+J+P%3BBrillant%2C+S%3BBurgdorf%2C+M%3BCaldwell%2C+J+A+R%3BCassan%2C+A%3BCole%2C+A%3BCook%2C+K+H%3BCoutures%2C+Ch%3BDieters%2C+S%3BPrester%2C+D+Dominis%3BDonatowicz%2C+J%3BFouque%2C+P%3BJorgensen%2C+U+G%3BKane%2C+S%3BKubas%2C+D%3BMarquette%2C+J+B%3BMartin%2C+R%3BMenzies%2C+J%3BPollard%2C+K+R%3BSahu%2C+K+C%3BWambsganss%2C+J%3BWilliams%2C+A%3BZub%2C+M&rft.aulast=Miyake&rft.aufirst=N&rft.date=2012-06-20&rft.volume=752&rft.issue=2&rft.spage=82+%2812pp%29&rft.isbn=&rft.btitle=&rft.title=The+%3D+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F752%2F2%2F82 L2 - http://iopscience.iop.org/0004-637X 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 IOP Publishing Ltd., London, United Kingdom N1 - PubXState - IL N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1088/0004-637X/752/2/82 ER - TY - JOUR T1 - Contributions of ectomycorrhizal fungal mats to forest soil respiration AN - 1028031328; 16899850 AB - Distinct aggregations of fungal hyphae and rhizomorphs, or "mats", formed by some genera of ectomycorrhizal (EcM) fungi are common features of soils in coniferous forests of the Pacific Northwest. We measured in situ respiration rates of Piloderma mats and neighboring non-mat soils in an old-growth Douglas-fir forest in western Oregon to investigate whether there was higher respiration from mats, and to estimate mat contributions to total soil respiration. We found that areas where Piloderma mats colonized the organic horizon often had higher soil surface flux than non-mats, with the relative increase in respiration averaging 16% across two growing seasons. Both soil physical factors and biochemistry were related to the higher surface flux of mat soils. When soil moisture was high, soil CO sub(2) production was concentrated into near-surface soil horizons where mats tend to colonize, resulting in greater apparent differences in respiration between mat and non-mat soils. Respiration rates were also correlated with the activity of chitin-degrading soil enzymes. This finding supports the notion that the abundance of fungal biomass in EcM mats is an important driver of C and N cycling. We found Piloderma mats present across 57% of the exposed soil, and use this value to estimate a respiratory contribution from mats at the stand-scale of about 9% of total soil respiration. The activity of EcM mats, which includes both EcM fungi and microbial associates, appeared to constitute a substantial portion of total soil respiration in this old-growth Douglas-fir forest. JF - Biogeosciences AU - Phillips, CL AU - Kluber, LA AU - Martin, J P AU - Caldwell, BA AU - Bond, B J AD - Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA Y1 - 2012/06/12/ PY - 2012 DA - 2012 Jun 12 SP - 2099 EP - 2110 PB - European Geosciences Union, c/o E.O.S.T. Strasbourg Cedex 67084 France VL - 9 IS - 6 SN - 1726-4170, 1726-4170 KW - ASFA 1: Biological Sciences & Living Resources; Microbiology Abstracts C: Algology, Mycology & Protozoology; Ecology Abstracts; Sustainability Science Abstracts KW - Biochemistry KW - Respiration KW - Abundance KW - Forests KW - INE, USA, Pacific Northwest KW - Soil KW - Rhizomorphs KW - Fungi KW - Hyphae KW - Carbon cycle KW - Enzymes KW - Coniferous forests KW - Biomass KW - INE, USA, Oregon KW - Ectomycorrhizas KW - Nitrogen cycle KW - Soil moisture KW - Carbon dioxide KW - Metabolism KW - Soil horizons KW - Q1 08482:Ecosystems and energetics KW - M3 1010:Issues in Sustainable Development KW - D 04040:Ecosystem and Ecology Studies KW - K 03320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1028031328?accountid=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=Biogeosciences&rft.atitle=Contributions+of+ectomycorrhizal+fungal+mats+to+forest+soil+respiration&rft.au=Phillips%2C+CL%3BKluber%2C+LA%3BMartin%2C+J+P%3BCaldwell%2C+BA%3BBond%2C+B+J&rft.aulast=Phillips&rft.aufirst=CL&rft.date=2012-06-12&rft.volume=9&rft.issue=6&rft.spage=2099&rft.isbn=&rft.btitle=&rft.title=Biogeosciences&rft.issn=17264170&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-07-01 N1 - Last updated - 2014-08-21 N1 - SubjectsTermNotLitGenreText - Fungi; Respiration; Carbon cycle; Nitrogen cycle; Carbon dioxide; Metabolism; Ectomycorrhizas; Hyphae; Abundance; Enzymes; Biomass; Soil moisture; Rhizomorphs; Soil horizons; Soil; Biochemistry; Forests; Coniferous forests; INE, USA, Oregon; INE, USA, Pacific Northwest ER - TY - JOUR T1 - Numerical analysis of contaminant removal from fractured rock during boiling AN - 1769964388; 2016-017201 AB - A multiphase heat transfer numerical model is used to simulate a laboratory experiment of contaminant removal at boiling temperatures from a rock core representing the matrix adjacent to a fracture. The simulated temperature, condensate production, contaminant and bromide concentrations are similar to experimental data. A key observation from the experiment and simulation is that boiling out approximately 1/2 pore volume (50 mL) of water results in the removal of essentially 100% of the dissolved volatile contaminant (1,2-DCA). A field-scale simulation using the multiple interacting continua (MINC) discretization approach is conducted to illustrate possible applications of thermal remediation of fractured geologic media, assuming uniform heating. The results show that after 28% of the pore water (including both steam vapor and liquid water) was extracted, and essentially all the 1,2-DCA mass (more than 99%) was removed. Abstract Copyright (2012) Elsevier, B.V. JF - Journal of Contaminant Hydrology AU - Chen, Fei AU - Falta, Ronald W AU - Murdoch, Lawrence C Y1 - 2012/06// PY - 2012 DA - June 2012 SP - 12 EP - 21 PB - Elsevier, Amsterdam VL - 134-135 SN - 0169-7722, 0169-7722 KW - halides KW - fractured materials KW - capillary pressure KW - halogens KW - water vapor KW - multiple interacting continua KW - bromides KW - simulation KW - temperature KW - remediation KW - ground water KW - laboratory studies KW - water pollution KW - chlorine KW - experimental studies KW - numerical models KW - condensation KW - pollutants KW - Paleozoic KW - Berea Sandstone KW - solutes KW - pollution KW - volatiles KW - organic compounds KW - boiling KW - thermal remediation KW - mathematical methods KW - heat transfer KW - reservoir properties KW - pore water KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769964388?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Numerical+analysis+of+contaminant+removal+from+fractured+rock+during+boiling&rft.au=Chen%2C+Fei%3BFalta%2C+Ronald+W%3BMurdoch%2C+Lawrence+C&rft.aulast=Chen&rft.aufirst=Fei&rft.date=2012-06-01&rft.volume=134-135&rft.issue=&rft.spage=12&rft.isbn=&rft.btitle=&rft.title=Journal+of+Contaminant+Hydrology&rft.issn=01697722&rft_id=info:doi/10.1016%2Fj.jconhyd.2012.04.004 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 - 41 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-03-03 N1 - SubjectsTermNotLitGenreText - Berea Sandstone; boiling; bromides; capillary pressure; chlorine; condensation; experimental studies; fractured materials; ground water; halides; halogens; heat transfer; laboratory studies; mathematical methods; multiple interacting continua; numerical models; organic compounds; Paleozoic; pollutants; pollution; pore water; remediation; reservoir properties; simulation; solutes; temperature; thermal remediation; volatiles; water pollution; water vapor DO - http://dx.doi.org/10.1016/j.jconhyd.2012.04.004 ER - TY - JOUR T1 - New approach reveals expanded extent of the Medieval climatic anomaly in sediment records from six northwest Ontario lakes AN - 1473596388; 2013-003312 JF - Program and Abstracts - American Quaternary Association. Conference AU - Laird, Kathleen R AU - Haig, Heather A AU - Ma, Susan AU - Kingsbury, Melanie V AU - Brown, Thomas A AU - Lewis, C F Michael AU - Oglesby, Robert J AU - Cumming, Brian F AU - Anonymous Y1 - 2012/06// PY - 2012 DA - June 2012 SP - 79 PB - American Quaternary Association, Seattle, WA VL - 22 SN - 0741-059X, 0741-059X KW - Plantae KW - benthic taxa KW - Quaternary KW - assemblages KW - lakes KW - planktonic taxa KW - algae KW - paleoclimatology KW - Holocene KW - climate change KW - paleoecology KW - Ontario KW - drought KW - Cenozoic KW - diatoms KW - Canada KW - Middle Ages KW - lacustrine environment KW - basins KW - Eastern Canada KW - Winnipeg River KW - fluvial environment KW - microfossils KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1473596388?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Program+and+Abstracts+-+American+Quaternary+Association.+Conference&rft.atitle=New+approach+reveals+expanded+extent+of+the+Medieval+climatic+anomaly+in+sediment+records+from+six+northwest+Ontario+lakes&rft.au=Laird%2C+Kathleen+R%3BHaig%2C+Heather+A%3BMa%2C+Susan%3BKingsbury%2C+Melanie+V%3BBrown%2C+Thomas+A%3BLewis%2C+C+F+Michael%3BOglesby%2C+Robert+J%3BCumming%2C+Brian+F%3BAnonymous&rft.aulast=Laird&rft.aufirst=Kathleen&rft.date=2012-06-01&rft.volume=22&rft.issue=&rft.spage=79&rft.isbn=&rft.btitle=&rft.title=Program+and+Abstracts+-+American+Quaternary+Association.+Conference&rft.issn=0741059X&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - AMQUA 2012, American Quaternary Association 22 (super nd) biennial meeting N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - WA N1 - Last updated - 2017-01-19 N1 - CODEN - AMQUAM N1 - SubjectsTermNotLitGenreText - algae; assemblages; basins; benthic taxa; Canada; Cenozoic; climate change; diatoms; drought; Eastern Canada; fluvial environment; Holocene; lacustrine environment; lakes; microfossils; Middle Ages; Ontario; paleoclimatology; paleoecology; planktonic taxa; Plantae; Quaternary; Winnipeg River ER - TY - JOUR T1 - Evaluations of Fission Chain Yields for (239)Pu from Fission-Spectrum Neutrons AN - 1038238706; 16901465 AB - Because of the importance of accurate data for fission chain yields (FCYs) for many applications, we present a rigorous "clean sheet" evaluation of all available data to provide an accurate set of pertinent FCYs. Because some nuclear data (e.g., half-lives, branching ratios, etc.) have been refined since the original analyses, where possible we update the data and their associated uncertainties. This evaluation is particularly topical since there are differences in the nuclear data used by radiochemists at different laboratories internationally and since some experiments from the 1970s have been recently reexamined with details published for the first time. The focus of this work is the production of a small set of fission products ((95)Zr, (99)Mo, (144)Ce, (147)Nd) from plutonium irradiated by fission spectrum neutrons. Because (147)Nd is a common isotope used at several laboratories, its production rate is examined critically. We find that most of the interlaboratory discrepancies can be explained by a dependence of its yield on the energy of the neutron causing fission, so we consider in detail the statistical significance of this claim. The potential for neutron energy dependence of (147)Nd production from plutonium was first recognized in 1977 by Maeck and recently raised again as a possibility by Chadwick. The data for (95)Zr, by contrast, demonstrate no statistically significant energy-dependence trends, but the data at the higher energies demonstrate significant scatter. With the relatively small number of data points, and recognizing that measurement methods and technologies have likely significantly improved in the nearly 30 years since the last measurement, additional measurements to refine the assessment and improve the uncertainties may be warranted. JF - Nuclear Science and Engineering AU - Thompson, I J AU - Dardenne, Y M X M AU - Kenneally, J M AU - Robertson, A AU - Ahle, L E AU - Hagmann, C A AU - Henderson, R A AU - Vogt, D AU - Wu, C-Y AU - Younes, W AD - Lawrence Livermore National Laboratory, Livermore, California 94551 Y1 - 2012/06// PY - 2012 DA - Jun 2012 SP - 85 EP - 135 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 171 IS - 2 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 - Assessments KW - Chains KW - Data points KW - Measurement methods KW - Nuclear fission KW - Plutonium KW - Recognition KW - Uncertainty UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1038238706?accountid=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=Evaluations+of+Fission+Chain+Yields+for+%28239%29Pu+from+Fission-Spectrum+Neutrons&rft.au=Thompson%2C+I+J%3BDardenne%2C+Y+M+X+M%3BKenneally%2C+J+M%3BRobertson%2C+A%3BAhle%2C+L+E%3BHagmann%2C+C+A%3BHenderson%2C+R+A%3BVogt%2C+D%3BWu%2C+C-Y%3BYounes%2C+W&rft.aulast=Thompson&rft.aufirst=I&rft.date=2012-06-01&rft.volume=171&rft.issue=2&rft.spage=85&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-09-01 N1 - Number of references - 57 N1 - Last updated - 2012-09-07 ER - TY - JOUR T1 - A thermodynamic model for the system SiO (sub 2) -H (sub 2) O near the upper critical end point based on quartz solubility experiments at 500-1100 degrees C and 5-20 kbar AN - 1037238417; 2012-078482 AB - A thermodynamic model of SiO (sub 2) -H (sub 2) O mixing in sub- and supercritical fluids has been developed based on new and existing experimental data on the solubility of quartz in H (sub 2) O. To supplement previously published data, we conducted new solubility experiments at 15 and 20 kbar and 900-1100 degrees C using hydrothermal piston-cylinder methods. At concentrations below nearly equal 10 mol% SiO (sub 2) , solubility was measured by single-crystal weight loss. At higher concentrations, solubility was determined by bracketing the presence and absence of quartz in quenched charges using multiple isothermal and isobaric runs with varying SiO (sub 2) -H (sub 2) O ratios. These data were combined with previously published results to construct a thermodynamic model of SiO (sub 2) -H (sub 2) O mixing. Following studies of silicate melts, the model takes oxygen in the fluid to be in three forms: free, molecular H (sub 2) O, Si-bridging oxygens (O (sub br) (super 2-) ), and the terminal hydroxyls (OH (sub tm) (super -) ) of silanol groups. The equilibrium exchange of oxygen between these forms can be written 1/2H (sub 2) O + 1/2O (sub br) (super 2-) = OH (sub tm) (super -) . The standard Gibbs free energy change of this reaction (Delta G) was incorporated into a subregular solution model for mixing of SiO (sub 2) liquid and H (sub 2) O fluid. The P-T dependences of Delta G and interchange energies were derived by an error minimization algorithm, producing thirteen independent fit parameters. The model is applicable from 5 to 20 kbar and 500 degrees C to the dry melting curve of quartz. It reproduces experimentally derived quartz solubility data to 3.8% on average (1sigma =5.3%). The model also predicts hydrous melting of quartz, critical melt-vapor mixing, activity-concentration relations, partial molar volume and entropy of aqueous silica, water speciation, and the thermal expansivity, isothermal compressibility, and isobaric heat capacity of a fluid in equilibrium with quartz. The model predicts a critical end point in the SiO (sub 2) -H (sub 2) O system at 1067 degrees C and 9.33 kbar, in very good agreement with the accepted location at nearly equal 1080 degrees C and 9.5-10 kbar. The model is also in good agreement with previous estimates of the extent of silica polymerization. The results of this study clearly demonstrate that there is an explicit link between polymerization chemistry and critical mixing of silicate-H (sub 2) O solutions. JF - Geochimica et Cosmochimica Acta AU - Hunt, J D AU - Manning, C E Y1 - 2012/06/01/ PY - 2012 DA - 2012 Jun 01 SP - 196 EP - 213 PB - Elsevier, New York, NY VL - 86 SN - 0016-7037, 0016-7037 KW - water KW - silicates KW - experimental studies KW - silica minerals KW - prediction KW - solubility KW - hydrochemistry KW - models KW - chemical reactions KW - water-rock interaction KW - phase equilibria KW - silica KW - mathematical methods KW - quartz KW - framework silicates KW - thermodynamic properties KW - crystal chemistry KW - geochemistry KW - P-T conditions KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1037238417?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+thermodynamic+model+for+the+system+SiO+%28sub+2%29+-H+%28sub+2%29+O+near+the+upper+critical+end+point+based+on+quartz+solubility+experiments+at+500-1100+degrees+C+and+5-20+kbar&rft.au=Hunt%2C+J+D%3BManning%2C+C+E&rft.aulast=Hunt&rft.aufirst=J&rft.date=2012-06-01&rft.volume=86&rft.issue=&rft.spage=196&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2012.03.006 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 57 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-08-31 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - chemical reactions; crystal chemistry; experimental studies; framework silicates; geochemistry; hydrochemistry; mathematical methods; models; P-T conditions; phase equilibria; prediction; quartz; silica; silica minerals; silicates; solubility; thermodynamic properties; water; water-rock interaction DO - http://dx.doi.org/10.1016/j.gca.2012.03.006 ER - TY - JOUR T1 - Neon diffusion kinetics in olivine, pyroxene and feldspar; retentivity of cosmogenic and nucleogenic neon AN - 1037238289; 2012-078471 AB - We performed stepwise degassing experiments by heating single crystals of neutron- or proton-irradiated olivine, pyroxene and feldspar to study diffusion kinetics of neon. This is important in evaluating the utility of these minerals for cosmogenic (super 21) Ne measurements and, potentially, for Ne thermochronometry. Degassing patterns are only partially explained by simple Arrhenius relationships; most samples do not exhibit a precisely-determined activation energy in an individual diffusion domain. Regardless, we find clear differences in diffusion kinetics among these minerals. Based on sub-selected data, our estimates for neon diffusion kinetics (activation energy E (sub a) and pre-exponential factor D (sub o) , assuming the analyzed fragments approximate the diffusion domain) in each mineral are as follows: for the feldspars, E (sub a) ranges from nearly equal 65 to 115 kJ/mol and D (sub o) from 3.9 x 10 (super -3) to 7.1 x 10 (super 2) cm (super 2) s (super -1) ; for the pyroxenes, E (sub a) ranges from nearly equal 292 to 480 kJ/mol and D (sub o) from 1.6 x 10 (super 2) to 2.9 x 10 (super 11) cm (super 2) s (super -1) ; for the olivines, E (sub a) ranges from nearly equal 360 to 370 kJ/mol and D (sub o) from 1.5 x 10 (super 6) to 5.0 x 10 (super 6) cm (super 2) s (super -1) . Differences in these parameters are broadly consistent with the expected effect of structural differences between feldspar, and olivine and pyroxene. These results indicate that cosmogenic (super 21) Ne will be quantitatively retained within olivine and pyroxene at Earth surface temperatures over geological timescales. The diffusion kinetics for feldspars, on the other hand, predicts that (super 21) Ne retention at Earth surface temperatures will vary significantly with domain size, crystal microtexture, surface temperature, and exposure duration. Quantitative retention is expected only in favorable conditions. This conclusion is reinforced by additional measurements of cosmogenic (super 21) Ne in coexisting quartz and feldspar from naturally irradiated surface samples; sanidine from a variety of rhyolitic ignimbrites exhibits quantitative retention, whereas alkali-feldspar from several granites does not. JF - Geochimica et Cosmochimica Acta AU - Gourbet, Loraine AU - Shuster, D L AU - Balco, G AU - Cassata, W S AU - Renne, P R AU - Rood, D Y1 - 2012/06/01/ PY - 2012 DA - 2012 Jun 01 SP - 21 EP - 36 PB - Elsevier, New York, NY VL - 86 SN - 0016-7037, 0016-7037 KW - silicates KW - volcanic rocks KW - isotopes KW - rhyolitic composition KW - igneous rocks KW - cosmogenic elements KW - olivine group KW - stable isotopes KW - temperature KW - Cenozoic KW - activation energy KW - pyroxene group KW - mineral composition KW - dates KW - noble gases KW - neon KW - olivine KW - retention KW - orthosilicates KW - absolute age KW - framework silicates KW - chemical composition KW - kinetics KW - geochemistry KW - degassing KW - chain silicates KW - Ar/Ar KW - experimental studies KW - diffusion KW - petrology KW - isotope ratios KW - ignimbrite KW - prediction KW - Ne-22/Ne-21 KW - Miocene KW - nesosilicates KW - pyroclastics KW - Tertiary KW - Neogene KW - crystal chemistry KW - feldspar group KW - 02D:Isotope geochemistry KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1037238289?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Neon+diffusion+kinetics+in+olivine%2C+pyroxene+and+feldspar%3B+retentivity+of+cosmogenic+and+nucleogenic+neon&rft.au=Gourbet%2C+Loraine%3BShuster%2C+D+L%3BBalco%2C+G%3BCassata%2C+W+S%3BRenne%2C+P+R%3BRood%2C+D&rft.aulast=Gourbet&rft.aufirst=Loraine&rft.date=2012-06-01&rft.volume=86&rft.issue=&rft.spage=21&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2012.03.002 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 66 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-08-31 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - absolute age; activation energy; Ar/Ar; Cenozoic; chain silicates; chemical composition; cosmogenic elements; crystal chemistry; dates; degassing; diffusion; experimental studies; feldspar group; framework silicates; geochemistry; igneous rocks; ignimbrite; isotope ratios; isotopes; kinetics; mineral composition; Miocene; Ne-22/Ne-21; Neogene; neon; nesosilicates; noble gases; olivine; olivine group; orthosilicates; petrology; prediction; pyroclastics; pyroxene group; retention; rhyolitic composition; silicates; stable isotopes; temperature; Tertiary; volcanic rocks DO - http://dx.doi.org/10.1016/j.gca.2012.03.002 ER - TY - JOUR T1 - High-throughput isotopic analysis of RNA microarrays to quantify microbial resource use AN - 1020847507; 16730843 AB - Most microorganisms remain uncultivated, and typically their ecological roles must be inferred from diversity and genomic studies. To directly measure functional roles of uncultivated microbes, we developed Chip-stable isotope probing (SIP), a high-sensitivity, high-throughput SIP method performed on a phylogenetic microarray (chip). This approach consists of microbial community incubations with isotopically labeled substrates, hybridization of the extracted community rRNA to a microarray and measurement of isotope incorporation-and therefore substrate use-by secondary ion mass spectrometer imaging (NanoSIMS). Laboratory experiments demonstrated that Chip-SIP can detect isotopic enrichment of 0.5 atom % super(13)C and 0.1 atom % super(15)N, thus permitting experiments with short incubation times and low substrate concentrations. We applied Chip-SIP analysis to a natural estuarine community and quantified amino acid, nucleic acid or fatty acid incorporation by 81 distinct microbial taxa, thus demonstrating that resource partitioning occurs with relatively simple organic substrates. The Chip-SIP approach expands the repertoire of stable isotope-enabled methods available to microbial ecologists and provides a means to test genomics-generated hypotheses about biogeochemical function in any natural environment. JF - ISME Journal AU - Mayali, Xavier AU - Weber, Peter K AU - Brodie, Eoin L AU - Mabery, Shalini AU - Hoeprich, Paul D AU - Pett-Ridge, Jennifer AD - Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, CA, USA Y1 - 2012/06// PY - 2012 DA - Jun 2012 SP - 1210 EP - 1221 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 6 IS - 6 SN - 1751-7362, 1751-7362 KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Biotechnology and Bioengineering Abstracts; Biochemistry Abstracts 2: Nucleic Acids KW - Amino acids KW - DNA microarrays KW - Fatty acids KW - Isotopes KW - Microorganisms KW - Phylogeny KW - Resource partitioning KW - genomics KW - imaging KW - nucleic acids KW - rRNA KW - W 30910:Imaging KW - A 01310:Products of Microorganisms KW - N 14810:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1020847507?accountid=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=ISME+Journal&rft.atitle=High-throughput+isotopic+analysis+of+RNA+microarrays+to+quantify+microbial+resource+use&rft.au=Mayali%2C+Xavier%3BWeber%2C+Peter+K%3BBrodie%2C+Eoin+L%3BMabery%2C+Shalini%3BHoeprich%2C+Paul+D%3BPett-Ridge%2C+Jennifer&rft.aulast=Mayali&rft.aufirst=Xavier&rft.date=2012-06-01&rft.volume=6&rft.issue=6&rft.spage=1210&rft.isbn=&rft.btitle=&rft.title=ISME+Journal&rft.issn=17517362&rft_id=info:doi/10.1038%2Fismej.2011.175 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-06-01 N1 - Last updated - 2013-01-25 N1 - SubjectsTermNotLitGenreText - Phylogeny; rRNA; Isotopes; nucleic acids; Amino acids; Microorganisms; Fatty acids; genomics; imaging; DNA microarrays; Resource partitioning DO - http://dx.doi.org/10.1038/ismej.2011.175 ER - TY - JOUR T1 - Estimating probabilities in recommendation systems AN - 1021123239; 4305394 AB - Recommendation systems are emerging as an important business application with significant economic impact. Currently popular systems include Amazon's book recommendations, Netflix's movie recommendations and Pandora's music recommendations. We address the problem of estimating probabilities associated with recommendation system data by using non-parametric kernel smoothing. In our estimation we interpret missing items as randomly censored observations of preference relations and obtain efficient computation schemes by using combinatorial properties of generating functions. We demonstrate our approach with several case-studies involving real world movie recommendation data. The results are comparable with state of the art techniques while also providing probabilistic preference estimates outside the scope of traditional recommender systems. Reprinted by permission of Blackwell Publishers JF - Journal of the Royal Statistical Society AU - Kidwell, Paul AU - Sun, Mingxuan AU - Lebanon, Guy AD - Georgia Institute of Technology ; Lawrence Livermore National Laboratory Y1 - 2012/05// PY - 2012 DA - May 2012 SP - 471 EP - 492 VL - 61 IS - 3 SN - 0035-9254, 0035-9254 KW - Economics KW - Consumer preferences KW - Measurement KW - Probability KW - Innovation KW - Computational methods KW - Observation KW - Estimation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1021123239?accountid=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=Journal+of+the+Royal+Statistical+Society&rft.atitle=Estimating+probabilities+in+recommendation+systems&rft.au=Kidwell%2C+Paul%3BSun%2C+Mingxuan%3BLebanon%2C+Guy&rft.aulast=Kidwell&rft.aufirst=Paul&rft.date=2012-05-01&rft.volume=61&rft.issue=3&rft.spage=471&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+Royal+Statistical+Society&rft.issn=00359254&rft_id=info:doi/10.1111%2Fj.1467-9876.2011.01027.x LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2013-06-12 N1 - Last updated - 2013-09-16 N1 - SubjectsTermNotLitGenreText - 10214 12224 971; 4403 7854; 2671 10919; 7854; 2795; 8829; 6564 12622 DO - http://dx.doi.org/10.1111/j.1467-9876.2011.01027.x ER - TY - JOUR T1 - Skip the Alignment: Degenerate, Multiplex Primer and Probe Design Using K-mer Matching Instead of Alignments AN - 1773825075; 16574288 AB - PriMux is a new software package for selecting multiplex compatible, degenerate primers and probes to detect diverse targets such as viruses. It requires no multiple sequence alignment, instead applying k-mer algorithms, hence it scales well for large target sets and saves user effort from curating sequences into alignable groups. PriMux has the capability to predict degenerate primers as well as probes suitable for TaqMan or other primer/probe triplet assay formats, or simply probes for microarray or other single-oligo assay formats. PriMux employs suffix array methods for efficient calculations on oligos 10- similar to 100 nt in length. TaqMan registered primers and probes for each segment of Rift Valley fever virus were designed using PriMux, and lab testing comparing signatures designed using PriMux versus those designed using traditional methods demonstrated equivalent or better sensitivity for the PriMux-designed signatures compared to traditional signatures. In addition, we used PriMux to design TaqMan registered primers and probes for unalignable or poorly alignable groups of targets: that is, all segments of Rift Valley fever virus analyzed as a single target set of 198 sequences, or all 2863 Dengue virus genomes for all four serotypes available at the time of our analysis. The PriMux software is available as open source from http://sourceforge.net/projects/PriMux. JF - PLoS ONE AU - Hysom, David A AU - Naraghi-Arani, Pejman AU - Elsheikh, Maher AU - Carrillo, ACelena AU - Williams, Peter L AU - Gardner, Shea N AD - Computations, Lawrence Livermore National Laboratory, Livermore, California, United States of America Y1 - 2012/04/02/ PY - 2012 DA - 2012 Apr 02 PB - BioMed Central Ltd., Middlesex House London W1T 4LB United Kingdom VL - 7 IS - 4 KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 1: Biological Sciences & Living Resources KW - Dengue virus KW - Genomes KW - Computer programs KW - Viruses KW - Rift Valley fever virus KW - Rift valleys KW - Q1 08201:General KW - Q5 08524:Public health, medicines, dangerous organisms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773825075?accountid=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=PLoS+ONE&rft.atitle=Skip+the+Alignment%3A+Degenerate%2C+Multiplex+Primer+and+Probe+Design+Using+K-mer+Matching+Instead+of+Alignments&rft.au=Hysom%2C+David+A%3BNaraghi-Arani%2C+Pejman%3BElsheikh%2C+Maher%3BCarrillo%2C+ACelena%3BWilliams%2C+Peter+L%3BGardner%2C+Shea+N&rft.aulast=Hysom&rft.aufirst=David&rft.date=2012-04-02&rft.volume=7&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=PLoS+ONE&rft.issn=1932-6203&rft_id=info:doi/10.1371%2Fjournal.pone.0034560 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Genomes; Computer programs; Viruses; Rift valleys; Dengue virus; Rift Valley fever virus DO - http://dx.doi.org/10.1371/journal.pone.0034560 ER - TY - JOUR T1 - Event discrimination using regional moment tensors with teleseismic-P constraints AN - 1039340645; 2012-081457 AB - Determining whether a seismic event is an earthquake, explosion, collapse, or something more complex can be done using regional (Delta 10 s) full waveform moment tensors down to low magnitudes (M approximately 3.5). The moment tensor results can be improved for sparse station configurations when teleseismic (Delta >30 degrees ) array-based short-period (T<1 s) P constraints are added. The inclusion of teleseismic-P aids in event discrimination because it samples the lower region of the focal-sphere, a region where intermediate-period waveforms recorded at the surface have low-sensitivity for shallow event depths. The teleseismic-P constraint is particularly useful in reducing the trade-off between a shallow explosion and a shallow volume-compensated linear-vector dipole with a vertical axis in compression. This trade-off can complicate discrimination. The teleseismic-P constraint is applied to the source-type analysis of the announced nuclear test of the Democratic People's Republic of Korea on 25 May 2009, resulting in greater confidence in a dominantly explosive solution. JF - Bulletin of the Seismological Society of America AU - Ford, Sean R AU - Walter, William R AU - Dreger, Douglas S Y1 - 2012/04// PY - 2012 DA - April 2012 SP - 867 EP - 872 PB - Seismological Society of America, Berkeley, CA VL - 102 IS - 2 SN - 0037-1106, 0037-1106 KW - P-waves KW - body waves KW - technology KW - Far East KW - discriminant analysis KW - collapse structures KW - explosions KW - statistical analysis KW - elastic waves KW - Korea KW - teleseismic signals KW - case studies KW - moment tensors KW - seismicity KW - seismic waves 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/1039340645?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Event+discrimination+using+regional+moment+tensors+with+teleseismic-P+constraints&rft.au=Ford%2C+Sean+R%3BWalter%2C+William+R%3BDreger%2C+Douglas+S&rft.aulast=Ford&rft.aufirst=Sean&rft.date=2012-04-01&rft.volume=102&rft.issue=2&rft.spage=867&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120110227 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2012-01-01 N1 - Number of references - 27 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2012-09-14 N1 - SubjectsTermNotLitGenreText - Asia; body waves; case studies; collapse structures; discriminant analysis; earthquakes; elastic waves; explosions; Far East; instruments; Korea; moment tensors; nuclear explosions; P-waves; seismic waves; seismicity; statistical analysis; technology; teleseismic signals DO - http://dx.doi.org/10.1785/0120110227 ER - TY - JOUR T1 - Deep earthquakes beneath the Northern Caucasus; evidence of active or recent subduction in western Asia AN - 1039340638; 2012-081456 AB - An intermediate-depth earthquake is confirmed at a depth of 158+ or -4 km under the northern foothills of the Greater Caucasus. Separate methods were used to confirm the depth: data from local and regional networks, teleseismic depth phases, and examination of waveforms. Additional examination of global catalogs suggests the presence of a (perhaps remnant) northeast-dipping subduction zone under the Greater Caucasus. The most likely explanation appears to be subduction of oceanic crust with the interface at the northern edge of the Kura Basin. Events at depths of 30-50 km in the Kura Basin may be related to underthrusting by the South Caspian basin rather than subduction in the Greater Caucasus. JF - Bulletin of the Seismological Society of America AU - Mellors, R J AU - Jackson, J AU - Myers, S AU - Gok, R AU - Priestley, K AU - Yetirmishli, G AU - Turkelli, N AU - Godoladze, T Y1 - 2012/04// PY - 2012 DA - April 2012 SP - 862 EP - 866 PB - Seismological Society of America, Berkeley, CA VL - 102 IS - 2 SN - 0037-1106, 0037-1106 KW - Europe KW - subduction KW - Russian Federation KW - teleseismic signals KW - Mohorovicic discontinuity KW - depth KW - plate tectonics KW - Commonwealth of Independent States KW - seismicity KW - intermediate-focus earthquakes KW - Caucasus KW - Northern Caucasus KW - earthquakes KW - Kura Basin KW - 18:Solid-earth geophysics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1039340638?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Deep+earthquakes+beneath+the+Northern+Caucasus%3B+evidence+of+active+or+recent+subduction+in+western+Asia&rft.au=Mellors%2C+R+J%3BJackson%2C+J%3BMyers%2C+S%3BGok%2C+R%3BPriestley%2C+K%3BYetirmishli%2C+G%3BTurkelli%2C+N%3BGodoladze%2C+T&rft.aulast=Mellors&rft.aufirst=R&rft.date=2012-04-01&rft.volume=102&rft.issue=2&rft.spage=862&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120110184 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2012-01-01 N1 - Number of references - 40 N1 - PubXState - CA N1 - Document feature - illus. incl. 2 tables, geol. sketch maps N1 - Last updated - 2012-09-14 N1 - SubjectsTermNotLitGenreText - Caucasus; Commonwealth of Independent States; depth; earthquakes; Europe; intermediate-focus earthquakes; Kura Basin; Mohorovicic discontinuity; Northern Caucasus; plate tectonics; Russian Federation; seismicity; subduction; teleseismic signals DO - http://dx.doi.org/10.1785/0120110184 ER - TY - JOUR T1 - Differential t* measurements via instantaneous frequency matching; observations of lower mantle shear attenuation heterogeneity beneath western Central America AN - 1015462089; 2012-050007 AB - We infer shear attenuation in the lower mantle by using the method of instantaneous frequency matching to calculate differential t* between core-reflected ScS and direct S (delta t* (sub ScS-S) ). The instantaneous frequency at the envelope peak of a seismic phase is related to the average Fourier spectral frequency of that phase. To estimate delta t* (sub ScS-S) for a given trace, we first calculate the instantaneous frequency at the envelope peak of S and ScS. The trace is then attenuated through convolution with a suite of t* operators until the instantaneous frequency at the envelope peak of the seismic phase with the initially larger instantaneous frequency matches the value of the smaller instantaneous frequency from the initial calculation. The differential t* operator required to accomplish the match is then delta t* (sub ScS-S) . We also calculate delta t* (sub ScS-S) from the slope of the spectral ratio of windowed ScS and S. Both the spectral ratio and instantaneous frequency methods produce consistent results for high signal-to-noise ratio synthetic waveforms with S and ScS well separated in time, and where there are no other interfering phases. The instantaneous frequency method gives more stable results for low signal-to-noise ratio waveforms, and where S and/or ScS are affected by other interfering seismic phases. The instantaneous frequency matching method is applied to broadband data from South American earthquakes recorded in California that sample the lower mantle beneath Central America and the Cocos Plate. delta t* (sub ScS-S) ranges from approximately -4 to 2 s, but are predominately negative, suggesting S is more attenuated than ScS for these data. We estimate the possibly contaminating effects of 3-D velocity heterogeneity on delta t* (sub ScS-S) through analysis of synthetic seismograms computed for a cross-section through a tomographically derived model of global shear wave heterogeneity, using an axisymmetric finite difference algorithm. Synthetics for path geometries of our data predict a delta t* (sub ScS-S) of approximately 0.2 s. We investigate the effect of seismic anisotropy by comparing delta t* (sub ScS-S) before and after a subset of the data were corrected using splitting parameters obtained by linearizing the particle motion of the S and ScS phases. The rms error of the residuals between the corrected and uncorrected delta t* (sub ScS-S) is approximately 0.2 s. Neither of these efforts, however, match the large negative observed delta t* (sub ScS-S) values, suggesting the mid-mantle beneath western Central America is in fact much more attenuating than the lowermost mantle below it, or S may be broadened by out-of-plane propagation effects, involving the remains of the Farallon Plate containing stronger velocity heterogeneity than is imaged by seismic tomography. Abstract Copyright (2012), RAS. JF - Geophysical Journal International AU - Ford, Sean R AU - Garnero, Edward J AU - Thorne, Michael S Y1 - 2012/04// PY - 2012 DA - April 2012 SP - 513 EP - 523 PB - Wiley-Blackwell on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 189 IS - 1 SN - 0956-540X, 0956-540X KW - body waves KW - geophysical surveys KW - time series analysis KW - three-dimensional models KW - lithosphere KW - statistical analysis KW - geophysical methods KW - mantle KW - elastic waves KW - seismic methods KW - lower mantle KW - attenuation KW - plate tectonics KW - Cocos Plate KW - surveys KW - seismic waves KW - algorithms KW - heterogeneity KW - Central America KW - anisotropy KW - 18:Solid-earth geophysics KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1015462089?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Differential+t*+measurements+via+instantaneous+frequency+matching%3B+observations+of+lower+mantle+shear+attenuation+heterogeneity+beneath+western+Central+America&rft.au=Ford%2C+Sean+R%3BGarnero%2C+Edward+J%3BThorne%2C+Michael+S&rft.aulast=Ford&rft.aufirst=Sean&rft.date=2012-04-01&rft.volume=189&rft.issue=1&rft.spage=513&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1111%2Fj.1365-246X.2011.05348.x L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2012-01-01 N1 - Number of references - 86 N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - algorithms; anisotropy; attenuation; body waves; Central America; Cocos Plate; elastic waves; geophysical methods; geophysical surveys; heterogeneity; lithosphere; lower mantle; mantle; plate tectonics; seismic methods; seismic waves; statistical analysis; surveys; three-dimensional models; time series analysis DO - http://dx.doi.org/10.1111/j.1365-246X.2011.05348.x ER - TY - JOUR T1 - Rapid climate change and no-analog vegetation in lowland Central America during the last 86,000 years AN - 1015463009; 2012-049920 AB - Glacial-interglacial climate cycles are known to have triggered migrations and reassortments of tropical biota. Although long-term precessionally-driven changes in temperature and precipitation have been demonstrated using tropical sediment records, responses to abrupt climate changes, e.g. the cooling of Heinrich stadials or warmings of the deglaciation, are poorly documented. The best predictions of future forest responses to ongoing warming will rely on evaluating the influences of both abrupt and long-term climate changes on past ecosystems. A sedimentary sequence recovered from Lake Peten-Itza, Guatemalan lowlands, provided a natural archive of environmental history. Pollen and charcoal analyses were used to reconstruct the vegetation and climate history of the area during the last 86,000 years. We found that vegetation composition and air temperature were strongly influenced by millennial-scale changes in the North Atlantic Ocean. Whereas Greenland warm interstadials were associated with warm and relatively wet conditions in the Central American lowlands, cold Greenland stadials, especially those associated with Heinrich events, caused extremely dry and cold conditions. Even though the vegetation seemed to have been highly resilient, plant associations without modern analogs emerged mostly following sharp climate pulses of either warmth or cold, and were paralleled by exceptionally high rates of ecological change. Although pulses of temperature change are evident in this 86,000-year record none matched the rates projected for the 21st Century. According to our findings, the ongoing rapid warming will cause no-modern-analog communities, which given the improbability of returning to lower-than-modern CO (sub 2) levels, anthropogenic barriers to migration, and increased anthropogenic fires, will pose immense threats to the biodiversity of the region. JF - Quaternary Science Reviews AU - Correa-Metrio, Alexander AU - Bush, Mark B AU - Cabrera, Kenneth R AU - Sully, Shannon AU - Brenner, Mark AU - Hodell, David A AU - Escobar, Jaime AU - Guilderson, Tom Y1 - 2012/03/30/ PY - 2012 DA - 2012 Mar 30 SP - 63 EP - 75 PB - Elsevier VL - 38 SN - 0277-3791, 0277-3791 KW - lithostratigraphy KW - isotopes KW - northern Guatemala KW - paleoclimatology KW - cores KW - climate change KW - paleoecology KW - magnetic properties KW - fires KW - Cenozoic KW - radioactive isotopes KW - pollen KW - dates KW - paleotemperature KW - carbon KW - sediments KW - absolute age KW - miospores KW - charcoal KW - Quaternary KW - biostratigraphy KW - Guatemala KW - statistical analysis KW - Yucatan Peninsula KW - paleomagnetism KW - Lake Peten Itza KW - Peten Guatemala KW - upper Quaternary KW - palynomorphs KW - magnetic susceptibility KW - lacustrine environment KW - C-14 KW - Central America KW - microfossils KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1015463009?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Rapid+climate+change+and+no-analog+vegetation+in+lowland+Central+America+during+the+last+86%2C000+years&rft.au=Correa-Metrio%2C+Alexander%3BBush%2C+Mark+B%3BCabrera%2C+Kenneth+R%3BSully%2C+Shannon%3BBrenner%2C+Mark%3BHodell%2C+David+A%3BEscobar%2C+Jaime%3BGuilderson%2C+Tom&rft.aulast=Correa-Metrio&rft.aufirst=Alexander&rft.date=2012-03-30&rft.volume=38&rft.issue=&rft.spage=63&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2Fj.quascirev.2012.01.025 L2 - http://www.sciencedirect.com/science/journal/02773791 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 89 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2012-07-19 N1 - SubjectsTermNotLitGenreText - absolute age; biostratigraphy; C-14; carbon; Cenozoic; Central America; charcoal; climate change; cores; dates; fires; Guatemala; isotopes; lacustrine environment; Lake Peten Itza; lake sediments; lithostratigraphy; magnetic properties; magnetic susceptibility; microfossils; miospores; northern Guatemala; paleoclimatology; paleoecology; paleomagnetism; paleotemperature; palynomorphs; Peten Guatemala; pollen; Quaternary; radioactive isotopes; sediments; statistical analysis; upper Quaternary; Yucatan Peninsula DO - http://dx.doi.org/10.1016/j.quascirev.2012.01.025 ER - TY - JOUR T1 - Decontamination After a Release of B. anthracis Spores AN - 1560114326; 17458554 AB - Decontaminating civilian facilities or large urban areas following an attack with Bacillus anthracis poses daunting challenges because of the lack of resources and proven technologies. Nevertheless, lessons learned from the 2001 cleanups together with advances derived from recent research have improved our understanding of what is required for effective decontamination. This article reviews current decontamination technologies appropriate for use in outdoor environments, on material surfaces, within large enclosed spaces, in water, and on waste contaminated with aerosolized B. anthracis spores. JF - Biosecurity and Bioterrorism AU - Campbell, C G AU - Kirvel, R D AU - Love, AH AU - Bailey, C G AU - Miles, R AU - Schweickert, J AU - Sutton, M AU - Raber, E AD - Lawrence Livermore National Laboratory, P.O. Box 808, L-627, Livermore, CA 94551, USA, campbell48@llnl.gov Y1 - 2012/03/28/ PY - 2012 DA - 2012 Mar 28 SP - 108 EP - 122 VL - 10 IS - 1 SN - 1538-7135, 1538-7135 KW - Toxicology Abstracts KW - bioterrorism KW - Wastes KW - Decontamination KW - Bacillus anthracis KW - Spores KW - X 24370:Natural Toxins UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560114326?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxicologyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biosecurity+and+Bioterrorism&rft.atitle=Decontamination+After+a+Release+of+B.+anthracis+Spores&rft.au=Campbell%2C+C+G%3BKirvel%2C+R+D%3BLove%2C+AH%3BBailey%2C+C+G%3BMiles%2C+R%3BSchweickert%2C+J%3BSutton%2C+M%3BRaber%2C+E&rft.aulast=Campbell&rft.aufirst=C&rft.date=2012-03-28&rft.volume=10&rft.issue=1&rft.spage=108&rft.isbn=&rft.btitle=&rft.title=Biosecurity+and+Bioterrorism&rft.issn=15387135&rft_id=info:doi/10.1089%2Fbsp.2011.0095 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2014-10-02 N1 - SubjectsTermNotLitGenreText - bioterrorism; Wastes; Decontamination; Spores; Bacillus anthracis DO - http://dx.doi.org/10.1089/bsp.2011.0095 ER - TY - JOUR T1 - A approximately 43-ka record of paleoenvironmental change in the Central American lowlands inferred from stable isotopes of lacustrine ostracods AN - 1312834510; 2013-020529 AB - We present a continuous ostracod isotope (delta (super 18) O and delta (super 13) C) record from Lake Peten Itza, Peten, Guatemala, in the northern, lowland Neotropics that spans the last approximately 43 cal ka BP. Variations in oxygen and carbon isotopes closely follow lithologic variations, which consist of alternating gypsum and clay deposits that were deposited under relatively dry and wet climate, respectively. During the last glacial period, the greatest delta (super 18) O and delta (super 13) C values coincide with gypsum deposited during lake lowstands under arid climate conditions that were correlated previously with North Atlantic Heinrich events. In contrast, interstadials and the entirety of the Last Glacial Maximum ( approximately 24-19 cal ka BP) are marked by clay deposition and lower delta (super 18) O and delta (super 13) C values, reflecting higher lake levels and relatively moister climate. Isotope results and pollen data, along with independently inferred past water levels, show the early deglacial period ( approximately 19-15 cal ka BP) was the time of greatest aridity and lowest lake stage of the past 43 ka. This period occurred during Heinrich Stadial 1 (HS 1), when an extensive tropical megadrought has been postulated (Stager et al., 2011). Heinrich Stadial 1 is represented by two episodes of gypsum precipitation and high delta (super 18) O and delta (super 13) C values in Peten Itza, interrupted by an intervening period of lower delta (super 18) O and delta (super 13) C and clay deposition centered on approximately 17 cal ka BP. The two periods of inferred maximum cold and/or arid conditions at approximately 17.5 and 16.1 cal ka BP coincide approximately with two pulses of ice-rafted debris (IRD) recorded off southern Portugal (Bard et al., 2000). At approximately 15 cal ka BP, coinciding with the start of the Bolling-Allerod period, delta (super 18) O and delta (super 13) C decrease and gypsum precipitation ceases, indicating a transition to warmer and/or wetter conditions. Gypsum precipitation resumed while delta (super 18) O and delta (super 13) C increased at the start of the Younger Dryas at 13.1 cal ka BP and continued until 10.4 cal ka BP, near the onset of the Holocene. Precipitation changes during the last glacial period in the northern hemisphere Neotropics were closely linked with freshwater forcing to the high-latitude North Atlantic, and sensitive to changes in the location of meltwater input. Climate was coldest/driest when meltwater directly entered the high-latitude North Atlantic, permitting sea ice expansion and weakening of Atlantic Meridional Overturning Circulation (AMOC), which resulted in a more southerly position of the Intertropical Convergence Zone (ITCZ). Upon deglaciation, when meltwater was directed to the Gulf of Mexico, at approximately 17 ka and during the Bolling-Allerod period (15-13 ka), precipitation increased in the northern hemisphere Neotropics as North Atlantic sea ice retreated and the ITCZ shifted northward. Results from Lake Peten Itza offer some support for the meltwater routing hypothesis of Clark et al. (2001). Abstract Copyright (2012) Elsevier, B.V. JF - Quaternary Science Reviews AU - Escobar, Jaime AU - Hodell, David A AU - Brenner, Mark AU - Curtis, Jason H AU - Gilli, Adrian AU - Mueller, Andreas D AU - Anselmetti, Flavio S AU - Ariztegui, Daniel AU - Grzesik, Dustin A AU - Perez, Liseth AU - Schwalb, Antje AU - Guilderson, Thomas P Y1 - 2012/03/22/ PY - 2012 DA - 2012 Mar 22 SP - 92 EP - 104 PB - Elsevier VL - 37 SN - 0277-3791, 0277-3791 KW - lithostratigraphy KW - oxygen KW - isotopes KW - northern Guatemala KW - magnetostratigraphy KW - paleoclimatology KW - Ostracoda KW - Holocene KW - stable isotopes KW - cores KW - magnetic properties KW - upper Pleistocene KW - Cenozoic KW - radioactive isotopes KW - dates KW - carbon KW - sediments KW - chemostratigraphy KW - absolute age KW - Invertebrata KW - Quaternary KW - chronostratigraphy KW - biostratigraphy KW - isotope ratios KW - Crustacea KW - Guatemala KW - C-13/C-12 KW - paleomagnetism KW - O-18/O-16 KW - Lake Peten Itza KW - paleoenvironment KW - Arthropoda KW - Mandibulata KW - magnetic susceptibility KW - lacustrine environment KW - Pleistocene KW - C-14 KW - Central America KW - microfossils KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312834510?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+approximately+43-ka+record+of+paleoenvironmental+change+in+the+Central+American+lowlands+inferred+from+stable+isotopes+of+lacustrine+ostracods&rft.au=Escobar%2C+Jaime%3BHodell%2C+David+A%3BBrenner%2C+Mark%3BCurtis%2C+Jason+H%3BGilli%2C+Adrian%3BMueller%2C+Andreas+D%3BAnselmetti%2C+Flavio+S%3BAriztegui%2C+Daniel%3BGrzesik%2C+Dustin+A%3BPerez%2C+Liseth%3BSchwalb%2C+Antje%3BGuilderson%2C+Thomas+P&rft.aulast=Escobar&rft.aufirst=Jaime&rft.date=2012-03-22&rft.volume=37&rft.issue=&rft.spage=92&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2Fj.quascirev.2012.01.020 L2 - http://www.sciencedirect.com/science/journal/02773791 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 92 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2013-02-28 N1 - SubjectsTermNotLitGenreText - absolute age; Arthropoda; biostratigraphy; C-13/C-12; C-14; carbon; Cenozoic; Central America; chemostratigraphy; chronostratigraphy; cores; Crustacea; dates; Guatemala; Holocene; Invertebrata; isotope ratios; isotopes; lacustrine environment; Lake Peten Itza; lake sediments; lithostratigraphy; magnetic properties; magnetic susceptibility; magnetostratigraphy; Mandibulata; microfossils; northern Guatemala; O-18/O-16; Ostracoda; oxygen; paleoclimatology; paleoenvironment; paleomagnetism; Pleistocene; Quaternary; radioactive isotopes; sediments; stable isotopes; upper Pleistocene DO - http://dx.doi.org/10.1016/j.quascirev.2012.01.020 ER - TY - JOUR T1 - Spatially constant slip rate along the southern segment of the Karakorum Fault since 200 ka AN - 1026860052; 2012-064812 AB - Determining the slip-rate history along the right-lateral Karakorum fault (KF) is fundamental to understanding its present-day kinematic role in the deformation of Tibet. Geodetic and geologic studies suggest slip-rates of 0-11 mm/yr along this structure. Whether slip-rate variability exists along strike and/or time, or simply results from different measuring techniques/timescales, remains unknown. In order to constrain slip-rates within a timescale of 200 ka, we studied fluvial and glacial geomorphic features that are right-laterally or vertically offset by the fault by varying amounts from 7+ or -1m to 430+ or -30m and up to 53+ or -5m, respectively. We constrained their ages using (super 10) Be surface exposure dating on 141 quartz-rich samples collected on 4 lateral moraines and at 3 alluvial sites along the southernmost segment of the KF (Menshi-Kailas basin) and along the Gurla Mandhata detachment fault in the Pulan graben. From the 30 degrees fault bend at Baer (80.5 degrees E) to Mount Kailas area, the slip-rate along the KF is >7.1 (super +3.2) / (sub -1.7) mm/yr at Menshi and >7.9 (super +3.2) / (sub -2.5) mm/yr at Kailas (slip on two parallel fault strands). In the Pulan graben, the normal fault slip-rate is >1.6 (super +0.4) / (sub -0.3) mm/yr. Our data suggest that the Quaternary slip-rate along the southern KF does not decrease eastward but is constant along strike for at least 200 km, from >5-11 mm/yr in the Gar basin further north to >7-8 mm/yr in the Menshi-Kailas basin. Because no expected along-strike slip-rate gradient is observed, it implies that the KF does not end at the Kailas but must extend where the slip rate decreases, i.e. eastward along the Yarlung Zangbo suture and southward along the Gurla Mandhata-Humla fault system. Abstract Copyright (2012) Elsevier, B.V. JF - Tectonophysics AU - Chevalier, Marie-Luce AU - Tapponnier, Paul AU - van der Woerd, Jerome AU - Ryerson, Frederick J AU - Finkel, Robert C AU - Li, Hiabing Y1 - 2012/03/20/ PY - 2012 DA - 2012 Mar 20 SP - 152 EP - 179 PB - Elsevier, Amsterdam VL - 530-531 SN - 0040-1951, 0040-1951 KW - Pulan Graben KW - paleoseismicity KW - Far East KW - Menshi-Kailas Basin KW - isotopes KW - detachment faults KW - Humla Fault KW - slip rates KW - segmentation KW - strike-slip faults KW - displacements KW - Mount Kailas KW - Cenozoic KW - suture zones KW - radioactive isotopes KW - neotectonics KW - Indus-Yarlung Zangbo suture zone KW - dates KW - Tibetan Plateau KW - absolute age KW - Himalayas KW - tectonics KW - Asia KW - active faults KW - seismotectonics KW - faults KW - China KW - systems KW - alkaline earth metals KW - Quaternary KW - Be-10 KW - landform evolution KW - Manasarovar Lake KW - Gurla Mandhata Fault KW - glacial features KW - plate convergence KW - grabens KW - Karakoram Fault KW - kinematics KW - metals KW - Kailas Range KW - fluvial features KW - Pleistocene KW - geomorphology KW - earthquakes KW - beryllium KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1026860052?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Tectonophysics&rft.atitle=Spatially+constant+slip+rate+along+the+southern+segment+of+the+Karakorum+Fault+since+200+ka&rft.au=Chevalier%2C+Marie-Luce%3BTapponnier%2C+Paul%3Bvan+der+Woerd%2C+Jerome%3BRyerson%2C+Frederick+J%3BFinkel%2C+Robert+C%3BLi%2C+Hiabing&rft.aulast=Chevalier&rft.aufirst=Marie-Luce&rft.date=2012-03-20&rft.volume=530-531&rft.issue=&rft.spage=152&rft.isbn=&rft.btitle=&rft.title=Tectonophysics&rft.issn=00401951&rft_id=info:doi/10.1016%2Fj.tecto.2011.12.014 L2 - http://www.sciencedirect.com/science/journal/00401951 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 43 N1 - Document feature - illus. incl. 4 tables, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-10-18 N1 - CODEN - TCTOAM N1 - SubjectsTermNotLitGenreText - absolute age; active faults; alkaline earth metals; Asia; Be-10; beryllium; Cenozoic; China; dates; detachment faults; displacements; earthquakes; Far East; faults; fluvial features; geomorphology; glacial features; grabens; Gurla Mandhata Fault; Himalayas; Humla Fault; Indus-Yarlung Zangbo suture zone; isotopes; Kailas Range; Karakoram Fault; kinematics; landform evolution; Manasarovar Lake; Menshi-Kailas Basin; metals; Mount Kailas; neotectonics; paleoseismicity; plate convergence; Pleistocene; Pulan Graben; Quaternary; radioactive isotopes; segmentation; seismotectonics; slip rates; strike-slip faults; suture zones; systems; tectonics; Tibetan Plateau DO - http://dx.doi.org/10.1016/j.tecto.2011.12.014 ER - TY - JOUR T1 - Thermodynamic Properties of Complex Actinide Alloys AN - 1372611389; 18029221 AB - Nuclear fuels for fast spectrum nuclear reactors raise challenging questions on the role of minor actinides and fission products and gases on properties and performance. Hence, prediction of phase stability trends and phase diagrams of complex actinide-based alloys is undoubtedly required to be able to predict materials performance. CALPHAD, combined with first-principles electronic structure results, is a powerful tool to predict the thermodynamic properties of actinide-based multi-component alloys. After a brief review of the available knowledge on {Am,Np,Pu,U,Zr} that are the basis for candidate metallic fuels, we focus on two examples, Am-Pu and Mo-U, for which ab initio input provides useful guidance for well-chosen experiments that can lead to full validation and verification of the thermodynamic driving force that is critically needed for subsequent work on materials evolution and performance. Work performed under the auspices of the U.S. DOE by LLNL under contract DE-AC52-07NA27344. JF - AIP Conference Proceedings AU - Turchi, Patrice AU - Landa, Alexander AU - Soderlind, Per AD - Lawrence Livermore National Laboratory Y1 - 2012/03/15/ PY - 2012 DA - 2012 Mar 15 PB - American Institute of Physics, Ste. 1NO1 Melville NY 11747-4502 United States SN - 0094-243X, 0094-243X KW - Environment Abstracts KW - Prediction KW - USA KW - Gases KW - Thermodynamics KW - Conferences KW - Contracts KW - Reviews KW - Nuclear fuels KW - Alloys KW - Actinides KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1372611389?accountid=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=conference&rft.jtitle=AIP+Conference+Proceedings&rft.atitle=Thermodynamic+Properties+of+Complex+Actinide+Alloys&rft.au=Turchi%2C+Patrice%3BLanda%2C+Alexander%3BSoderlind%2C+Per&rft.aulast=Turchi&rft.aufirst=Patrice&rft.date=2012-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=AIP+Conference+Proceedings&rft.issn=0094243X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Prediction; Gases; Contracts; Conferences; Thermodynamics; Reviews; Nuclear fuels; Alloys; Actinides; USA ER -