TY - CPAPER T1 - Seeking Ancient Microbial Biosignatures With PIXL on Mars 2020 T2 - 47th American Geophysical Union Fall Meeting AN - 1651745275; 6332292 JF - 47th American Geophysical Union Fall Meeting AU - Allwood, Abigail AU - Hurowitz, Joel AU - Wade, Lawrence AU - Hodyss, Robert AU - Flannery, David 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/1651745275?accountid=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=Seeking+Ancient+Microbial+Biosignatures+With+PIXL+on+Mars+2020&rft.au=Allwood%2C+Abigail%3BHurowitz%2C+Joel%3BWade%2C+Lawrence%3BHodyss%2C+Robert%3BFlannery%2C+David&rft.aulast=Allwood&rft.aufirst=Abigail&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 - Performance of and Uncertainties in the Global Precipitation Measurement (GPM) Microwave Imager Retrieval Algorithm for Falling Snow Estimates T2 - 47th American Geophysical Union Fall Meeting AN - 1651745248; 6332763 JF - 47th American Geophysical Union Fall Meeting AU - Skofronick Jackson, Gail AU - Munchak, Stephen AU - Johnson, Benjamin Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Microwave radiation KW - Mathematical models KW - Snow KW - Algorithms KW - Precipitation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745248?accountid=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=Performance+of+and+Uncertainties+in+the+Global+Precipitation+Measurement+%28GPM%29+Microwave+Imager+Retrieval+Algorithm+for+Falling+Snow+Estimates&rft.au=Skofronick+Jackson%2C+Gail%3BMunchak%2C+Stephen%3BJohnson%2C+Benjamin&rft.aulast=Skofronick+Jackson&rft.aufirst=Gail&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 - NASA and GLOBE Connect K-12 Students to NGSS with Big Data Applications T2 - 47th American Geophysical Union Fall Meeting AN - 1651745211; 6332811 JF - 47th American Geophysical Union Fall Meeting AU - Oostra, Daniel AU - Hunt, Thomas AU - Chambers, Lin AU - Lewis, Preston Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745211?accountid=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=NASA+and+GLOBE+Connect+K-12+Students+to+NGSS+with+Big+Data+Applications&rft.au=Oostra%2C+Daniel%3BHunt%2C+Thomas%3BChambers%2C+Lin%3BLewis%2C+Preston&rft.aulast=Oostra&rft.aufirst=Daniel&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 - Beyond Fapar: Modeling Light Utilization in Tropical Forests T2 - 47th American Geophysical Union Fall Meeting AN - 1651745204; 6332719 JF - 47th American Geophysical Union Fall Meeting AU - Morton, Douglas AU - Rubio, Jeremy AU - Cook, Bruce AU - Gastellu-Etchegorry, Jean AU - Keller, Michael Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Tropical forests UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745204?accountid=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=Beyond+Fapar%3A+Modeling+Light+Utilization+in+Tropical+Forests&rft.au=Morton%2C+Douglas%3BRubio%2C+Jeremy%3BCook%2C+Bruce%3BGastellu-Etchegorry%2C+Jean%3BKeller%2C+Michael&rft.aulast=Morton&rft.aufirst=Douglas&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 - Probing Planetary Bodies for Subsurface Volatiles: GEANT4 Models of Gamma Ray, Fast, Epithermal, and Thermal Neutron Response to Active Neutron Illumination T2 - 47th American Geophysical Union Fall Meeting AN - 1651745127; 6333083 JF - 47th American Geophysical Union Fall Meeting AU - Chin, Gordon AU - Sagdeev, Roald AU - Su, Jao AU - Murray, Joseph Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Neutrons KW - Illumination KW - Volatiles KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745127?accountid=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=Probing+Planetary+Bodies+for+Subsurface+Volatiles%3A+GEANT4+Models+of+Gamma+Ray%2C+Fast%2C+Epithermal%2C+and+Thermal+Neutron+Response+to+Active+Neutron+Illumination&rft.au=Chin%2C+Gordon%3BSagdeev%2C+Roald%3BSu%2C+Jao%3BMurray%2C+Joseph&rft.aulast=Chin&rft.aufirst=Gordon&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 - Quantifying the Resilience of Vegetation and Soil Moisture During Dry Spells Using Satellite Remote Sensing T2 - 47th American Geophysical Union Fall Meeting AN - 1651745103; 6333349 JF - 47th American Geophysical Union Fall Meeting AU - Stampoulis, Dimitrios AU - Andreadis, Konstantinos AU - Granger, Stephanie AU - Fisher, Joshua AU - Behrangi, Ali AU - Das, Narendra AU - Turk, Joseph Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Remote sensing KW - Vegetation KW - Soil moisture KW - Satellites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745103?accountid=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=Quantifying+the+Resilience+of+Vegetation+and+Soil+Moisture+During+Dry+Spells+Using+Satellite+Remote+Sensing&rft.au=Stampoulis%2C+Dimitrios%3BAndreadis%2C+Konstantinos%3BGranger%2C+Stephanie%3BFisher%2C+Joshua%3BBehrangi%2C+Ali%3BDas%2C+Narendra%3BTurk%2C+Joseph&rft.aulast=Stampoulis&rft.aufirst=Dimitrios&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 - Exploration for Evidence of Habitable Environments and Life on Mars Can Benefit from Research in Analog Environments T2 - 47th American Geophysical Union Fall Meeting AN - 1651745091; 6332287 JF - 47th American Geophysical Union Fall Meeting AU - Des Marais, David Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Analogs KW - Exploration UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745091?accountid=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=Exploration+for+Evidence+of+Habitable+Environments+and+Life+on+Mars+Can+Benefit+from+Research+in+Analog+Environments&rft.au=Des+Marais%2C+David&rft.aulast=Des+Marais&rft.aufirst=David&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 - Establishing the Geomagnetic Disturbance Benchmark Event for Evaluation of the Space Weather Hazard on Power Grids T2 - 47th American Geophysical Union Fall Meeting AN - 1651745067; 6332317 JF - 47th American Geophysical Union Fall Meeting AU - Pulkkinen, Antti AU - Bernabeu, Emanuel AU - Eichner, Jan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Weather KW - Weather hazards KW - Disturbance KW - Benchmarks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745067?accountid=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=Establishing+the+Geomagnetic+Disturbance+Benchmark+Event+for+Evaluation+of+the+Space+Weather+Hazard+on+Power+Grids&rft.au=Pulkkinen%2C+Antti%3BBernabeu%2C+Emanuel%3BEichner%2C+Jan&rft.aulast=Pulkkinen&rft.aufirst=Antti&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 - Radiation Dosimetry Experiment (RaD-X): High-Altitude Balloon Flight Mission for Improving the Nairas Aviation Radiation Model T2 - 47th American Geophysical Union Fall Meeting AN - 1651745050; 6332305 JF - 47th American Geophysical Union Fall Meeting AU - Mertens, Christopher Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Flight KW - Radiation KW - Dosimetry KW - Radiation dosimetry KW - Models KW - Balloons UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745050?accountid=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=Radiation+Dosimetry+Experiment+%28RaD-X%29%3A+High-Altitude+Balloon+Flight+Mission+for+Improving+the+Nairas+Aviation+Radiation+Model&rft.au=Mertens%2C+Christopher&rft.aulast=Mertens&rft.aufirst=Christopher&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 - Vesta's Pinaria Region- A window on Vesta's Ancient Crust T2 - 47th American Geophysical Union Fall Meeting AN - 1651745020; 6333091 JF - 47th American Geophysical Union Fall Meeting AU - McFadden, Lucy-Ann AU - De Sanctis, Maria AU - Ammannito, Eleonora AU - Combe, Jean AU - Pieters, Carle AU - Tosi, Federico AU - Nathues, Andreas AU - Stephan, Katrin 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/1651745020?accountid=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=Vesta%27s+Pinaria+Region-+A+window+on+Vesta%27s+Ancient+Crust&rft.au=McFadden%2C+Lucy-Ann%3BDe+Sanctis%2C+Maria%3BAmmannito%2C+Eleonora%3BCombe%2C+Jean%3BPieters%2C+Carle%3BTosi%2C+Federico%3BNathues%2C+Andreas%3BStephan%2C+Katrin&rft.aulast=McFadden&rft.aufirst=Lucy-Ann&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 - Model analysis of the tropospheric ozone trend over Reunion Island from 1992 to 2011 T2 - 47th American Geophysical Union Fall Meeting AN - 1651744806; 6332573 JF - 47th American Geophysical Union Fall Meeting AU - Liu, Junhua AU - Rodriguez, Jose AU - Thompson, Anne AU - Douglass, Anne AU - Olsen, Mark AU - Steenrod, Stephen AU - Logan, Jennifer Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Islands KW - Troposphere KW - Models KW - Ozone UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651744806?accountid=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=Model+analysis+of+the+tropospheric+ozone+trend+over+Reunion+Island+from+1992+to+2011&rft.au=Liu%2C+Junhua%3BRodriguez%2C+Jose%3BThompson%2C+Anne%3BDouglass%2C+Anne%3BOlsen%2C+Mark%3BSteenrod%2C+Stephen%3BLogan%2C+Jennifer&rft.aulast=Liu&rft.aufirst=Junhua&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 - Radar Detections of Buried Supraglacial Lakes Across the Greenland Ice Sheet T2 - 47th American Geophysical Union Fall Meeting AN - 1651744711; 6332619 JF - 47th American Geophysical Union Fall Meeting AU - Koenig, Lora Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Ice KW - Lakes KW - Greenland, Greenland Ice Sheet KW - Radar KW - Glaciation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651744711?accountid=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=Radar+Detections+of+Buried+Supraglacial+Lakes+Across+the+Greenland+Ice+Sheet&rft.au=Koenig%2C+Lora&rft.aulast=Koenig&rft.aufirst=Lora&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 Value of Analog Research in the Search for Life T2 - 47th American Geophysical Union Fall Meeting AN - 1651744601; 6332293 JF - 47th American Geophysical Union Fall Meeting AU - Voytek, Mary Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Analogs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651744601?accountid=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+Value+of+Analog+Research+in+the+Search+for+Life&rft.au=Voytek%2C+Mary&rft.aulast=Voytek&rft.aufirst=Mary&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 - Precursor Environmental Conditions Associated with the Termination of Madden-Julian Oscillation Events T2 - 47th American Geophysical Union Fall Meeting AN - 1651744585; 6333203 JF - 47th American Geophysical Union Fall Meeting AU - Stachnik, Justin AU - Waliser, Duane AU - Majda, Andrew Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Oscillations KW - Environmental conditions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651744585?accountid=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=Precursor+Environmental+Conditions+Associated+with+the+Termination+of+Madden-Julian+Oscillation+Events&rft.au=Stachnik%2C+Justin%3BWaliser%2C+Duane%3BMajda%2C+Andrew&rft.aulast=Stachnik&rft.aufirst=Justin&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 - Building a Science Communication Culture: One Agency's Approach T2 - 47th American Geophysical Union Fall Meeting AN - 1651744582; 6332632 JF - 47th American Geophysical Union Fall Meeting AU - DeWitt, Sarah AU - Tenenbaum, Laura AU - Betz, Laura Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Communication UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651744582?accountid=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=Building+a+Science+Communication+Culture%3A+One+Agency%27s+Approach&rft.au=DeWitt%2C+Sarah%3BTenenbaum%2C+Laura%3BBetz%2C+Laura&rft.aulast=DeWitt&rft.aufirst=Sarah&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 - Earth-Directed ICME Magnetic Field Configurations T2 - 47th American Geophysical Union Fall Meeting AN - 1651744199; 6331390 JF - 47th American Geophysical Union Fall Meeting AU - Nieves-Chinchilla, Teresa AU - Szabo, Adam AU - Vourlidas, Angelos AU - Savani, Neel AU - Hidalgo, Miguel AU - Yu, Wenyuan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Magnetic fields UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651744199?accountid=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=Earth-Directed+ICME+Magnetic+Field+Configurations&rft.au=Nieves-Chinchilla%2C+Teresa%3BSzabo%2C+Adam%3BVourlidas%2C+Angelos%3BSavani%2C+Neel%3BHidalgo%2C+Miguel%3BYu%2C+Wenyuan&rft.aulast=Nieves-Chinchilla&rft.aufirst=Teresa&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 - Airborne Tropical TRopopause EXperiment (ATTREX) 2014 Western Pacific Campaign T2 - 47th American Geophysical Union Fall Meeting AN - 1651744142; 6331848 JF - 47th American Geophysical Union Fall Meeting AU - Jensen, Eric AU - Pfister, Leonhard Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - IW, Pacific KW - Tropopause UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651744142?accountid=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=Airborne+Tropical+TRopopause+EXperiment+%28ATTREX%29+2014+Western+Pacific+Campaign&rft.au=Jensen%2C+Eric%3BPfister%2C+Leonhard&rft.aulast=Jensen&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 - Measurement of Subsidence Across the Sacramento Delta: Applying InSAR to a Coherence-challenged Area T2 - 47th American Geophysical Union Fall Meeting AN - 1651743944; 6332118 JF - 47th American Geophysical Union Fall Meeting AU - Jones, Cathleen AU - Sharma, Priyanka Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Subsidence KW - Deltas KW - USA, California, Sacramento Delta UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651743944?accountid=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=Measurement+of+Subsidence+Across+the+Sacramento+Delta%3A+Applying+InSAR+to+a+Coherence-challenged+Area&rft.au=Jones%2C+Cathleen%3BSharma%2C+Priyanka&rft.aulast=Jones&rft.aufirst=Cathleen&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 - Space Weather Models - What They Can and Cannot Do T2 - 47th American Geophysical Union Fall Meeting AN - 1651743852; 6331542 JF - 47th American Geophysical Union Fall Meeting AU - MacNeice, Peter Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Weather KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651743852?accountid=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=Space+Weather+Models+-+What+They+Can+and+Cannot+Do&rft.au=MacNeice%2C+Peter&rft.aulast=MacNeice&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 - Solving the carbon tetrachloride (CCl4) budget mystery using surface observations T2 - 47th American Geophysical Union Fall Meeting AN - 1651743688; 6331846 JF - 47th American Geophysical Union Fall Meeting AU - Liang, Qing AU - Newman, Paul AU - Daniel, John AU - Reimann, Stefan AU - Hall, Brad AU - Dutton, Geoffrey AU - Kuijpers, Lambert Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Carbon tetrachloride KW - Budgets UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651743688?accountid=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=Solving+the+carbon+tetrachloride+%28CCl4%29+budget+mystery+using+surface+observations&rft.au=Liang%2C+Qing%3BNewman%2C+Paul%3BDaniel%2C+John%3BReimann%2C+Stefan%3BHall%2C+Brad%3BDutton%2C+Geoffrey%3BKuijpers%2C+Lambert&rft.aulast=Liang&rft.aufirst=Qing&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 - Dawn: A Simulation Model for Evaluating Costs and Tradeoffs of Big Data Science Architectures T2 - 47th American Geophysical Union Fall Meeting AN - 1651743300; 6331221 JF - 47th American Geophysical Union Fall Meeting AU - Cinquini, Luca AU - Crichton, Daniel AU - Braverman, Amy AU - Kyo, Lee AU - Fuchs, Thomas AU - Turmon, Michael Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Data processing KW - Simulation KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651743300?accountid=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=Dawn%3A+A+Simulation+Model+for+Evaluating+Costs+and+Tradeoffs+of+Big+Data+Science+Architectures&rft.au=Cinquini%2C+Luca%3BCrichton%2C+Daniel%3BBraverman%2C+Amy%3BKyo%2C+Lee%3BFuchs%2C+Thomas%3BTurmon%2C+Michael&rft.aulast=Cinquini&rft.aufirst=Luca&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 - Using Citizen Science and Crowdsourcing via Aurorasaurus as a Near Real Time Data Source for Space Weather Applications T2 - 47th American Geophysical Union Fall Meeting AN - 1651743028; 6332252 JF - 47th American Geophysical Union Fall Meeting AU - MacDonald, Elizabeth AU - Heavner, Matthew AU - Hall, Michelle AU - Tapia, Andrea AU - Lalone, Nicholas AU - Clayon, Jessica AU - Case, Nathan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Weather KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651743028?accountid=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=Using+Citizen+Science+and+Crowdsourcing+via+Aurorasaurus+as+a+Near+Real+Time+Data+Source+for+Space+Weather+Applications&rft.au=MacDonald%2C+Elizabeth%3BHeavner%2C+Matthew%3BHall%2C+Michelle%3BTapia%2C+Andrea%3BLalone%2C+Nicholas%3BClayon%2C+Jessica%3BCase%2C+Nathan&rft.aulast=MacDonald&rft.aufirst=Elizabeth&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 - SAM Chlorine Observations at Gale Crater T2 - 47th American Geophysical Union Fall Meeting AN - 1651742967; 6331359 JF - 47th American Geophysical Union Fall Meeting AU - Conrad, Pamela Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Craters KW - Chlorine KW - Storms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742967?accountid=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=SAM+Chlorine+Observations+at+Gale+Crater&rft.au=Conrad%2C+Pamela&rft.aulast=Conrad&rft.aufirst=Pamela&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 - Effects of Two Large Solar Energetic Particle Events on Middle Atmosphere Nighttime Odd Hydrogen and Ozone Content T2 - 47th American Geophysical Union Fall Meeting AN - 1651742958; 6331535 JF - 47th American Geophysical Union Fall Meeting AU - Verkhoglyadova, Olga AU - Butala, Mark AU - Wang, Shuhui AU - Mlynczak, Martin AU - Hunt, Linda AU - Zank, Gary Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Nighttime KW - Hydrogen KW - Particulates KW - Atmosphere KW - Ozone UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742958?accountid=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=Effects+of+Two+Large+Solar+Energetic+Particle+Events+on+Middle+Atmosphere+Nighttime+Odd+Hydrogen+and+Ozone+Content&rft.au=Verkhoglyadova%2C+Olga%3BButala%2C+Mark%3BWang%2C+Shuhui%3BMlynczak%2C+Martin%3BHunt%2C+Linda%3BZank%2C+Gary&rft.aulast=Verkhoglyadova&rft.aufirst=Olga&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 D/H Ratio of the Martian Water That Formed the Yellowknife Bay Mudstone Rocks Measured By the MSL-SAM Instrument T2 - 47th American Geophysical Union Fall Meeting AN - 1651742750; 6331355 JF - 47th American Geophysical Union Fall Meeting AU - Mahaffy, Paul Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Mudstone KW - Canada, Northwest Terr., Yellowknife UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742750?accountid=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+D%2FH+Ratio+of+the+Martian+Water+That+Formed+the+Yellowknife+Bay+Mudstone+Rocks+Measured+By+the+MSL-SAM+Instrument&rft.au=Mahaffy%2C+Paul&rft.aulast=Mahaffy&rft.aufirst=Paul&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 - Mars Atmospheric Composition, Isotope Ratios and Seasonal Variations: Overview and Updates of the SAM Measurements at Gale Crater T2 - 47th American Geophysical Union Fall Meeting AN - 1651742601; 6333854 JF - 47th American Geophysical Union Fall Meeting AU - Webster, Christopher Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Craters KW - Isotopes KW - Reviews KW - Atmospheric chemistry KW - Storms KW - Seasonal variations UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742601?accountid=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=Mars+Atmospheric+Composition%2C+Isotope+Ratios+and+Seasonal+Variations%3A+Overview+and+Updates+of+the+SAM+Measurements+at+Gale+Crater&rft.au=Webster%2C+Christopher&rft.aulast=Webster&rft.aufirst=Christopher&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 - Climate Model Evaluation Using Cloud Observations and Implications for Climate Sensitivity T2 - 47th American Geophysical Union Fall Meeting AN - 1651742592; 6330818 JF - 47th American Geophysical Union Fall Meeting AU - Jiang, Jonathan AU - Su, Hui Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Clouds KW - Sensitivity KW - Climate KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742592?accountid=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=Climate+Model+Evaluation+Using+Cloud+Observations+and+Implications+for+Climate+Sensitivity&rft.au=Jiang%2C+Jonathan%3BSu%2C+Hui&rft.aulast=Jiang&rft.aufirst=Jonathan&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 - Changing Aerosol Properties with Distance to Cloud; Is It an Artifact or Reality? T2 - 47th American Geophysical Union Fall Meeting AN - 1651742393; 6330817 JF - 47th American Geophysical Union Fall Meeting AU - Marshak, Alexander AU - Varnai, Tamas AU - Yang, Weidong AU - Wen, Guoyong Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Clouds KW - Aerosols KW - Artifacts UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742393?accountid=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=Changing+Aerosol+Properties+with+Distance+to+Cloud%3B+Is+It+an+Artifact+or+Reality%3F&rft.au=Marshak%2C+Alexander%3BVarnai%2C+Tamas%3BYang%2C+Weidong%3BWen%2C+Guoyong&rft.aulast=Marshak&rft.aufirst=Alexander&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 - Remote Sensing of Mycorrhizae? Detection of Mycorrhizal Association from Canopy Spectral Properties T2 - 47th American Geophysical Union Fall Meeting AN - 1651742338; 6330969 JF - 47th American Geophysical Union Fall Meeting AU - Fisher, Joshua AU - Sweeney, Sean AU - Brzostek, Edward AU - Evans, Tom AU - Bourg, Norman AU - Phillips, Richard Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Remote sensing KW - Canopies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742338?accountid=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=Remote+Sensing+of+Mycorrhizae%3F+Detection+of+Mycorrhizal+Association+from+Canopy+Spectral+Properties&rft.au=Fisher%2C+Joshua%3BSweeney%2C+Sean%3BBrzostek%2C+Edward%3BEvans%2C+Tom%3BBourg%2C+Norman%3BPhillips%2C+Richard&rft.aulast=Fisher&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 - EcoSAR: NASA's P-band fully polarimetric single pass interferometric airborne radar T2 - 47th American Geophysical Union Fall Meeting AN - 1651742334; 6333742 JF - 47th American Geophysical Union Fall Meeting AU - Osmanoglu, Batuhan AU - Rincon, Rafael AU - Fatoyinbo, Temilola AU - Lee, Seung-Kuk AU - Sun, Guoqing AU - Daniyan, Ozaveshe AU - Harcum, Marcus Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Airborne sensing KW - Radar UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742334?accountid=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=EcoSAR%3A+NASA%27s+P-band+fully+polarimetric+single+pass+interferometric+airborne+radar&rft.au=Osmanoglu%2C+Batuhan%3BRincon%2C+Rafael%3BFatoyinbo%2C+Temilola%3BLee%2C+Seung-Kuk%3BSun%2C+Guoqing%3BDaniyan%2C+Ozaveshe%3BHarcum%2C+Marcus&rft.aulast=Osmanoglu&rft.aufirst=Batuhan&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 the Implementation of GPS-based Tsunami Early Warning System Using Ionospheric Measurements T2 - 47th American Geophysical Union Fall Meeting AN - 1651742316; 6333370 JF - 47th American Geophysical Union Fall Meeting AU - Yang, Yu-ming AU - Komjathy, Attila AU - Meng, Xing AU - Verkhoglyadova, Olga AU - Mannucci, Anthony Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Tsunamis KW - Warning systems UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742316?accountid=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+the+Implementation+of+GPS-based+Tsunami+Early+Warning+System+Using+Ionospheric+Measurements&rft.au=Yang%2C+Yu-ming%3BKomjathy%2C+Attila%3BMeng%2C+Xing%3BVerkhoglyadova%2C+Olga%3BMannucci%2C+Anthony&rft.aulast=Yang&rft.aufirst=Yu-ming&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 Next Generation Gravity Field Mission T2 - 47th American Geophysical Union Fall Meeting AN - 1651742241; 6331048 JF - 47th American Geophysical Union Fall Meeting AU - Wiese, David AU - Bettadpur, Srinivas AU - Gruber, Thomas AU - Visser, Pieter AU - Watkins, Michael Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Gravity field KW - Gravity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742241?accountid=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+Next+Generation+Gravity+Field+Mission&rft.au=Wiese%2C+David%3BBettadpur%2C+Srinivas%3BGruber%2C+Thomas%3BVisser%2C+Pieter%3BWatkins%2C+Michael&rft.aulast=Wiese&rft.aufirst=David&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 - Long-Term Data Records of Biophysical Parameters from Multiple Satellite Systems T2 - 47th American Geophysical Union Fall Meeting AN - 1651742207; 6333633 JF - 47th American Geophysical Union Fall Meeting AU - Ganguly, Sangram AU - Nemani, Ramakrishna AU - Baret, Frederic AU - Myneni, Ranga AU - Zhang, Gong AU - Milesi, Cristina AU - Hashimoto, Hirofumi Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Data processing KW - Remote sensing KW - Satellites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742207?accountid=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=Long-Term+Data+Records+of+Biophysical+Parameters+from+Multiple+Satellite+Systems&rft.au=Ganguly%2C+Sangram%3BNemani%2C+Ramakrishna%3BBaret%2C+Frederic%3BMyneni%2C+Ranga%3BZhang%2C+Gong%3BMilesi%2C+Cristina%3BHashimoto%2C+Hirofumi&rft.aulast=Ganguly&rft.aufirst=Sangram&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 - Impact of Local and Non-local Sources of Pollution on Background US ozone: Potential Role of the Atmospheric Composition Constellation of Geostationary Sounders T2 - 47th American Geophysical Union Fall Meeting AN - 1651742180; 6333579 JF - 47th American Geophysical Union Fall Meeting AU - Bowman, Kevin AU - Lee, Meemong Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Air pollution KW - Atmospheric chemistry KW - Pollution KW - Ozone UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742180?accountid=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=Impact+of+Local+and+Non-local+Sources+of+Pollution+on+Background+US+ozone%3A+Potential+Role+of+the+Atmospheric+Composition+Constellation+of+Geostationary+Sounders&rft.au=Bowman%2C+Kevin%3BLee%2C+Meemong&rft.aulast=Bowman&rft.aufirst=Kevin&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 - ER-2 Airborne Radars Data during Iphex - a New 4-Frequency Look at Precipitation T2 - 47th American Geophysical Union Fall Meeting AN - 1651741940; 6331058 JF - 47th American Geophysical Union Fall Meeting AU - Heymsfield, Gerald AU - Tian, Lin AU - McLinden, Matthew AU - Li, Lihua AU - Cervantes, Jaime AU - Venkatesh, Vijay AU - Coon, Michael Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Data processing KW - Radar KW - Precipitation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741940?accountid=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=ER-2+Airborne+Radars+Data+during+Iphex+-+a+New+4-Frequency+Look+at+Precipitation&rft.au=Heymsfield%2C+Gerald%3BTian%2C+Lin%3BMcLinden%2C+Matthew%3BLi%2C+Lihua%3BCervantes%2C+Jaime%3BVenkatesh%2C+Vijay%3BCoon%2C+Michael&rft.aulast=Heymsfield&rft.aufirst=Gerald&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 - Quantifying change in North American Arctic lakes between 1990 and present T2 - 47th American Geophysical Union Fall Meeting AN - 1651741897; 6334246 JF - 47th American Geophysical Union Fall Meeting AU - Carroll, Mark AU - Wooten, Margaret AU - DiMiceli, Charlene AU - Sohlberg, Robert AU - Townshend, John Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - North America KW - Lakes KW - Polar environments KW - Arctic UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741897?accountid=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=Quantifying+change+in+North+American+Arctic+lakes+between+1990+and+present&rft.au=Carroll%2C+Mark%3BWooten%2C+Margaret%3BDiMiceli%2C+Charlene%3BSohlberg%2C+Robert%3BTownshend%2C+John&rft.aulast=Carroll&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 - Experimental investigations of Si-isotope fractionation associated with Fe-Si co-precipitates in simulated Precambrian seawater T2 - 47th American Geophysical Union Fall Meeting AN - 1651741725; 6333817 JF - 47th American Geophysical Union Fall Meeting AU - Zheng, Xinyuan AU - Beard, Brian AU - Reddy, Thiruchelvi AU - Johnson, Clark Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Precambrian KW - Fractionation KW - Marine environment KW - Seawater UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741725?accountid=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=Experimental+investigations+of+Si-isotope+fractionation+associated+with+Fe-Si+co-precipitates+in+simulated+Precambrian+seawater&rft.au=Zheng%2C+Xinyuan%3BBeard%2C+Brian%3BReddy%2C+Thiruchelvi%3BJohnson%2C+Clark&rft.aulast=Zheng&rft.aufirst=Xinyuan&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 - Enabling Web-Based GIS Tools for Internet and Mobile Devices To Improve and Expand NASA Data Accessibility and Analysis Functionality for the Renewable Energy and Agricultural Applications T2 - 47th American Geophysical Union Fall Meeting AN - 1651741650; 6333422 JF - 47th American Geophysical Union Fall Meeting AU - Ross, Amanda AU - Stackhouse, Paul AU - Tisdale, Brian AU - Tisdale, Matthew AU - Chandler, William AU - Hoell, James AU - Kusterer, John Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Resource management KW - Data processing KW - Renewable energy KW - Conservation KW - Geographic information systems KW - Environment management KW - Internet UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741650?accountid=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=Enabling+Web-Based+GIS+Tools+for+Internet+and+Mobile+Devices+To+Improve+and+Expand+NASA+Data+Accessibility+and+Analysis+Functionality+for+the+Renewable+Energy+and+Agricultural+Applications&rft.au=Ross%2C+Amanda%3BStackhouse%2C+Paul%3BTisdale%2C+Brian%3BTisdale%2C+Matthew%3BChandler%2C+William%3BHoell%2C+James%3BKusterer%2C+John&rft.aulast=Guzewich&rft.aufirst=Scott&rft.date=2014-12-01&rft.volume=119&rft.issue=12&rft.spage=2694&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004704 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 - Swarm Observations of Field-Aligned Currents: Case Studies T2 - 47th American Geophysical Union Fall Meeting AN - 1651741604; 6334097 JF - 47th American Geophysical Union Fall Meeting AU - Le, Guan AU - Chi, Peter AU - Gjerloev, Jesper AU - Stolle, Claudia AU - Luhr, Hermann AU - Park, Jaeheung AU - Rauberg, Jan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Case studies KW - Swarms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741604?accountid=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=Swarm+Observations+of+Field-Aligned+Currents%3A+Case+Studies&rft.au=Le%2C+Guan%3BChi%2C+Peter%3BGjerloev%2C+Jesper%3BStolle%2C+Claudia%3BLuhr%2C+Hermann%3BPark%2C+Jaeheung%3BRauberg%2C+Jan&rft.aulast=Le&rft.aufirst=Guan&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 - Radiolytic Gas-Driven Cryovolcanism at Europa T2 - 47th American Geophysical Union Fall Meeting AN - 1651741539; 6333477 JF - 47th American Geophysical Union Fall Meeting AU - Cooper, John AU - Sarantos, Menelaos AU - Sittler, Edward AU - Killen, Rosemary 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/1651741539?accountid=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=Radiolytic+Gas-Driven+Cryovolcanism+at+Europa&rft.au=Cooper%2C+John%3BSarantos%2C+Menelaos%3BSittler%2C+Edward%3BKillen%2C+Rosemary&rft.aulast=Cooper&rft.aufirst=John&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 - Ionosphere-Magnetosphere Coupling from Dynamics Explorer to Swarm and Beyond T2 - 47th American Geophysical Union Fall Meeting AN - 1651741000; 6334084 JF - 47th American Geophysical Union Fall Meeting AU - Moore, Thomas AU - Clemmons, James AU - Collinson, Glyn AU - Gershman, Daniel AU - Khazanov, George AU - Kistler, Lynn AU - Knudsen, David AU - Pfaff, Robert AU - Pollock, Craig AU - Rowland, Douglas Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Swarms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741000?accountid=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=Ionosphere-Magnetosphere+Coupling+from+Dynamics+Explorer+to+Swarm+and+Beyond&rft.au=Moore%2C+Thomas%3BClemmons%2C+James%3BCollinson%2C+Glyn%3BGershman%2C+Daniel%3BKhazanov%2C+George%3BKistler%2C+Lynn%3BKnudsen%2C+David%3BPfaff%2C+Robert%3BPollock%2C+Craig%3BRowland%2C+Douglas&rft.aulast=Moore&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 - On the role of pre-onset streamers in substorm onset and development T2 - 47th American Geophysical Union Fall Meeting AN - 1651740768; 6330679 JF - 47th American Geophysical Union Fall Meeting AU - Kepko, Larry Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Streamers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740768?accountid=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+role+of+pre-onset+streamers+in+substorm+onset+and+development&rft.au=Kepko%2C+Larry&rft.aulast=Kepko&rft.aufirst=Larry&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 - TOTAL Column Ozone from OMI - Continuuing the LONG TERM DATA Record T2 - 47th American Geophysical Union Fall Meeting AN - 1651740619; 6330301 JF - 47th American Geophysical Union Fall Meeting AU - McPeters, Richard AU - Frith, Stacey AU - Labow, Gordon AU - Seftor, Colin Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Data processing KW - Ozone UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740619?accountid=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=TOTAL+Column+Ozone+from+OMI+-+Continuuing+the+LONG+TERM+DATA+Record&rft.au=McPeters%2C+Richard%3BFrith%2C+Stacey%3BLabow%2C+Gordon%3BSeftor%2C+Colin&rft.aulast=McPeters&rft.aufirst=Richard&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Frost monitoring and forecasting using MODIS Land Surface Temperature data and a Numerical Weather Prediction model forecasts for Eastern Africa T2 - 47th American Geophysical Union Fall Meeting AN - 1651740594; 6330574 JF - 47th American Geophysical Union Fall Meeting AU - Limaye, Ashutosh AU - Kabuchanga, Eric AU - Flores, Africa AU - Mungai, John AU - Sakwa, Vincent AU - Shaka, Ayub AU - Malaso, Susan AU - Irwin, Daniel Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Prediction KW - Temperature effects KW - Data processing KW - Mathematical models KW - Frost KW - Prediction models KW - Africa KW - Weather forecasting UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740594?accountid=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=Frost+monitoring+and+forecasting+using+MODIS+Land+Surface+Temperature+data+and+a+Numerical+Weather+Prediction+model+forecasts+for+Eastern+Africa&rft.au=Limaye%2C+Ashutosh%3BKabuchanga%2C+Eric%3BFlores%2C+Africa%3BMungai%2C+John%3BSakwa%2C+Vincent%3BShaka%2C+Ayub%3BMalaso%2C+Susan%3BIrwin%2C+Daniel&rft.aulast=Limaye&rft.aufirst=Ashutosh&rft.date=2014-12-15&rft.volume=15&rft.issue=6&rft.spage=2140&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1175%2FJHM-D-13-0204.1 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 - Fingerprints of the Greenland Ice Sheet T2 - 47th American Geophysical Union Fall Meeting AN - 1651740427; 6328307 JF - 47th American Geophysical Union Fall Meeting AU - Nowicki, Sophie Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Ice KW - Greenland, Greenland Ice Sheet KW - Glaciation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740427?accountid=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=Fingerprints+of+the+Greenland+Ice+Sheet&rft.au=Nowicki%2C+Sophie&rft.aulast=Nowicki&rft.aufirst=Sophie&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 - Advances in Realistic MHD Simulation T2 - 47th American Geophysical Union Fall Meeting AN - 1651740368; 6329989 JF - 47th American Geophysical Union Fall Meeting AU - Kitiashvili, Irina Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Simulation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740368?accountid=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=Advances+in+Realistic+MHD+Simulation&rft.au=Kitiashvili%2C+Irina&rft.aulast=Kitiashvili&rft.aufirst=Irina&rft.date=2014-12-15&rft.volume=15&rft.issue=6&rft.spage=2446&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1175%2FJHM-D-13-0132.1 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 - Voyager 1 Observations of the Local Interstellar Magnetic Field T2 - 47th American Geophysical Union Fall Meeting AN - 1651740336; 6329646 JF - 47th American Geophysical Union Fall Meeting AU - Burlaga, Leonard AU - Ness, Norman Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Magnetic fields UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740336?accountid=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=Voyager+1+Observations+of+the+Local+Interstellar+Magnetic+Field&rft.au=Burlaga%2C+Leonard%3BNess%2C+Norman&rft.aulast=Burlaga&rft.aufirst=Leonard&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 Robust Multi-Scale Modeling System for the Study of Cloud and Precipitation Processes T2 - 47th American Geophysical Union Fall Meeting AN - 1651740294; 6329958 JF - 47th American Geophysical Union Fall Meeting AU - Tao, Wei-Kuo AU - Wu, Di AU - Lang, Stephen AU - Li, Xiaowen AU - Matsui, Toshihisa AU - Iguchi, Takamichi Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Clouds KW - Precipitation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740294?accountid=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+Robust+Multi-Scale+Modeling+System+for+the+Study+of+Cloud+and+Precipitation+Processes&rft.au=Tao%2C+Wei-Kuo%3BWu%2C+Di%3BLang%2C+Stephen%3BLi%2C+Xiaowen%3BMatsui%2C+Toshihisa%3BIguchi%2C+Takamichi&rft.aulast=Tao&rft.aufirst=Wei-Kuo&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 - Use of External Sources for Calibration and Validation of L-band Missions T2 - 47th American Geophysical Union Fall Meeting AN - 1651740277; 6334132 JF - 47th American Geophysical Union Fall Meeting AU - Misra, Sidharth AU - Brown, Shannon 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/1651740277?accountid=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=Use+of+External+Sources+for+Calibration+and+Validation+of+L-band+Missions&rft.au=Misra%2C+Sidharth%3BBrown%2C+Shannon&rft.aulast=Misra&rft.aufirst=Sidharth&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 - Application of remotely sensed data for landslide hazard assessment and forecasting T2 - 47th American Geophysical Union Fall Meeting AN - 1651740239; 6329410 JF - 47th American Geophysical Union Fall Meeting AU - Bach Kirschbaum, Dalia AU - Simmons, John AU - Cappelaere, Patrice Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Prediction KW - Landslides KW - Data processing KW - Hazard assessment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740239?accountid=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=article&rft.jtitle=Origins+of+Life+and+Evolution+of+the+Biosphere&rft.atitle=Molecular+crowding+and+early+evolution&rft.au=Saha%2C+Ranajay%3BPohorille%2C+Andrew%3BChen%2C+Irene+A&rft.aulast=Saha&rft.aufirst=Ranajay&rft.date=2014-12-01&rft.volume=44&rft.issue=4&rft.spage=319&rft.isbn=&rft.btitle=&rft.title=Origins+of+Life+and+Evolution+of+the+Biosphere&rft.issn=01696149&rft_id=info:doi/10.1007%2Fs11084-014-9392-3 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 - Does the Maritime Continent region affect sea level change of the eastern Indian Ocean? T2 - 47th American Geophysical Union Fall Meeting AN - 1651740228; 6329948 JF - 47th American Geophysical Union Fall Meeting AU - Llovel, William AU - Lee, Tong Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Continents KW - Indian Ocean KW - Oceans KW - Sea level changes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740228?accountid=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=Does+the+Maritime+Continent+region+affect+sea+level+change+of+the+eastern+Indian+Ocean%3F&rft.au=Llovel%2C+William%3BLee%2C+Tong&rft.aulast=Llovel&rft.aufirst=William&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Inter-Comparison of Aquarius and SMOS Calibration and Impact on Sea Surface Salinity Products T2 - 47th American Geophysical Union Fall Meeting AN - 1651740073; 6334130 JF - 47th American Geophysical Union Fall Meeting AU - Dinnat, Emmanuel AU - Boutin, Jacqueline AU - Le Vine, David AU - Yin, Xiaobin Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Salinity effects KW - Surface salinity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740073?accountid=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=Inter-Comparison+of+Aquarius+and+SMOS+Calibration+and+Impact+on+Sea+Surface+Salinity+Products&rft.au=Dinnat%2C+Emmanuel%3BBoutin%2C+Jacqueline%3BLe+Vine%2C+David%3BYin%2C+Xiaobin&rft.aulast=Dinnat&rft.aufirst=Emmanuel&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 - Airborne Eddy Covariance Fluxes Provide Novel Constraints on Sources and Sinks of Reactive Gases in the Planetary Boundary Layer T2 - 47th American Geophysical Union Fall Meeting AN - 1651740071; 6330217 JF - 47th American Geophysical Union Fall Meeting AU - Wolfe, Glenn AU - Hanisco, Thomas AU - Arkinson, Heather AU - Bui, Thaopaul AU - Mikoviny, Tomas AU - Wisthaler, Armin AU - Crounse, John AU - St Clair, Jason AU - Teng, Alex AU - Wennberg, Paul AU - Pollack, Ilana AU - Peischl, Jeff AU - Ryerson, Thomas AU - Ullmann, Kirk AU - Hall, Samuel Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Gases KW - Boundary layers KW - Oceanic eddies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740071?accountid=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=Airborne+Eddy+Covariance+Fluxes+Provide+Novel+Constraints+on+Sources+and+Sinks+of+Reactive+Gases+in+the+Planetary+Boundary+Layer&rft.au=Wolfe%2C+Glenn%3BHanisco%2C+Thomas%3BArkinson%2C+Heather%3BBui%2C+Thaopaul%3BMikoviny%2C+Tomas%3BWisthaler%2C+Armin%3BCrounse%2C+John%3BSt+Clair%2C+Jason%3BTeng%2C+Alex%3BWennberg%2C+Paul%3BPollack%2C+Ilana%3BPeischl%2C+Jeff%3BRyerson%2C+Thomas%3BUllmann%2C+Kirk%3BHall%2C+Samuel&rft.aulast=Wolfe&rft.aufirst=Glenn&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 - Implications of the Temporal Resolution of Fire Emissions on Direct and Indirect Aerosol Effects T2 - 47th American Geophysical Union Fall Meeting AN - 1651740047; 6329565 JF - 47th American Geophysical Union Fall Meeting AU - Darmenov, Anton AU - Barahona, Donifan AU - Kim, Kyu-Myong AU - da Silva, Arlindo AU - Colarco, Peter AU - Govindaraju, Ravi Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Fires KW - Aerosols KW - Emissions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740047?accountid=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=Implications+of+the+Temporal+Resolution+of+Fire+Emissions+on+Direct+and+Indirect+Aerosol+Effects&rft.au=Darmenov%2C+Anton%3BBarahona%2C+Donifan%3BKim%2C+Kyu-Myong%3Bda+Silva%2C+Arlindo%3BColarco%2C+Peter%3BGovindaraju%2C+Ravi&rft.aulast=Darmenov&rft.aufirst=Anton&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 - MODIS Microphysical Regimes for Examining Apparent Aerosol Effects on Clouds and Precipitation T2 - 47th American Geophysical Union Fall Meeting AN - 1651740018; 6329956 JF - 47th American Geophysical Union Fall Meeting AU - Oreopoulos, Lazaros AU - Cho, Nayeong AU - Lee, Dongmin AU - Kato, Seiji AU - Lebsock, Matthew AU - Yuan, Tianle AU - Huffman, George Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Clouds KW - Aerosols KW - Precipitation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740018?accountid=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=MODIS+Microphysical+Regimes+for+Examining+Apparent+Aerosol+Effects+on+Clouds+and+Precipitation&rft.au=Oreopoulos%2C+Lazaros%3BCho%2C+Nayeong%3BLee%2C+Dongmin%3BKato%2C+Seiji%3BLebsock%2C+Matthew%3BYuan%2C+Tianle%3BHuffman%2C+George&rft.aulast=Oreopoulos&rft.aufirst=Lazaros&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - The Role of Superthermal Electrons in High Latitude Ionospheric Outflows T2 - 47th American Geophysical Union Fall Meeting AN - 1651739924; 6334492 JF - 47th American Geophysical Union Fall Meeting AU - Glocer, Alex AU - Khazanov, George AU - Liemohn, Michael AU - Toth, Gabor AU - Gombosi, Tamas Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Outflow KW - Latitude UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651739924?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=The+Role+of+Superthermal+Electrons+in+High+Latitude+Ionospheric+Outflows&rft.au=Glocer%2C+Alex%3BKhazanov%2C+George%3BLiemohn%2C+Michael%3BToth%2C+Gabor%3BGombosi%2C+Tamas&rft.aulast=Glocer&rft.aufirst=Alex&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 - Predictability Studies Using the Intraseasonal Variability Hindcast Experiment (ISVHE) T2 - 47th American Geophysical Union Fall Meeting AN - 1651739815; 6334594 JF - 47th American Geophysical Union Fall Meeting AU - Waliser, Duane AU - Mani, Neena AU - Wang, Bin AU - Jiang, Xianan AU - Lee, June-yi AU - Lee, sun-Seon 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/1651739815?accountid=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=Predictability+Studies+Using+the+Intraseasonal+Variability+Hindcast+Experiment+%28ISVHE%29&rft.au=Waliser%2C+Duane%3BMani%2C+Neena%3BWang%2C+Bin%3BJiang%2C+Xianan%3BLee%2C+June-yi%3BLee%2C+sun-Seon&rft.aulast=Waliser&rft.aufirst=Duane&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/10.1088%2F0004-637X%2F797%2F1%2F41 L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Modeling the Inner-Magnetosphere Ionosphere with the CIMI Model T2 - 47th American Geophysical Union Fall Meeting AN - 1651739662; 6330660 JF - 47th American Geophysical Union Fall Meeting AU - Fok, Mei-Ching AU - Buzulukova, Natalia AU - Chen, Sheng-Hsien AU - Glocer, Alex AU - Nagai, Tsugunobu AU - Valek, Philip AU - Perez, Joseph Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Ionosphere KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651739662?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+the+Inner-Magnetosphere+Ionosphere+with+the+CIMI+Model&rft.au=Fok%2C+Mei-Ching%3BBuzulukova%2C+Natalia%3BChen%2C+Sheng-Hsien%3BGlocer%2C+Alex%3BNagai%2C+Tsugunobu%3BValek%2C+Philip%3BPerez%2C+Joseph&rft.aulast=Fok&rft.aufirst=Mei-Ching&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 - Knowledge gaps in organic aerosol global modeling T2 - 47th American Geophysical Union Fall Meeting AN - 1651739648; 6330826 JF - 47th American Geophysical Union Fall Meeting AU - Tsigaridis, Kostas AU - Daskalakis, Nikos AU - Kanakidou, Maria Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Aerosols UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651739648?accountid=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=Knowledge+gaps+in+organic+aerosol+global+modeling&rft.au=Tsigaridis%2C+Kostas%3BDaskalakis%2C+Nikos%3BKanakidou%2C+Maria&rft.aulast=Tsigaridis&rft.aufirst=Kostas&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 Multi-Parameter Aerosol Classification Method and its Application to Retrievals from Spaceborne Polarimetry T2 - 47th American Geophysical Union Fall Meeting AN - 1651739343; 6330810 JF - 47th American Geophysical Union Fall Meeting AU - Russell, Philip Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Aerosols KW - Classification UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651739343?accountid=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+Multi-Parameter+Aerosol+Classification+Method+and+its+Application+to+Retrievals+from+Spaceborne+Polarimetry&rft.au=Russell%2C+Philip&rft.aulast=Russell&rft.aufirst=Philip&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 - Quantification of Transport Model Error Impacts on CO2 Inversions Using NASA's GEOS-5 GCM T2 - 47th American Geophysical Union Fall Meeting AN - 1651738734; 6328260 JF - 47th American Geophysical Union Fall Meeting AU - Ott, Lesley AU - Pawson, Steven AU - Weir, Brad Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Inversion KW - Carbon dioxide KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738734?accountid=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=Quantification+of+Transport+Model+Error+Impacts+on+CO2+Inversions+Using+NASA%27s+GEOS-5+GCM&rft.au=Ott%2C+Lesley%3BPawson%2C+Steven%3BWeir%2C+Brad&rft.aulast=Ott&rft.aufirst=Lesley&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 - Microwave remote sensing of rain-on-snow events in the subarctic with AMSR2 and GPM observations T2 - 47th American Geophysical Union Fall Meeting AN - 1651738657; 6329075 JF - 47th American Geophysical Union Fall Meeting AU - Brucker, Ludovic AU - Munchak, Stephen Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Microwave radiation KW - Remote sensing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738657?accountid=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=Microwave+remote+sensing+of+rain-on-snow+events+in+the+subarctic+with+AMSR2+and+GPM+observations&rft.au=Brucker%2C+Ludovic%3BMunchak%2C+Stephen&rft.aulast=Brucker&rft.aufirst=Ludovic&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 - Deriving Time Series of Ice-Sheet Accumulation Variations from Altimeter Measurements of Surface-Elevation Changes T2 - 47th American Geophysical Union Fall Meeting AN - 1651738654; 6328631 JF - 47th American Geophysical Union Fall Meeting AU - Zwally, H AU - Li, Jun Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Altimeters KW - Time series analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738654?accountid=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=Deriving+Time+Series+of+Ice-Sheet+Accumulation+Variations+from+Altimeter+Measurements+of+Surface-Elevation+Changes&rft.au=Zwally%2C+H%3BLi%2C+Jun&rft.aulast=Zwally&rft.aufirst=H&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 - Interactions Between Arctic Sea Ice, Clouds, and the Circulation T2 - 47th American Geophysical Union Fall Meeting AN - 1651738550; 6328676 JF - 47th American Geophysical Union Fall Meeting AU - Taylor, Patrick AU - Kato, Seiji AU - Xu, Kuan-Man AU - Baker, Noel Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Clouds KW - Sea ice KW - Polar environments KW - Arctic UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738550?accountid=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=Interactions+Between+Arctic+Sea+Ice%2C+Clouds%2C+and+the+Circulation&rft.au=Taylor%2C+Patrick%3BKato%2C+Seiji%3BXu%2C+Kuan-Man%3BBaker%2C+Noel&rft.aulast=Taylor&rft.aufirst=Patrick&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 - AgMIP: New Results from Sub-Saharan Africa and South Asia Regional Integrated Assessments T2 - 47th American Geophysical Union Fall Meeting AN - 1651738532; 6328681 JF - 47th American Geophysical Union Fall Meeting AU - Rosenzweig, Cynthia Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Africa KW - Geophysics KW - Asia KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738532?accountid=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=AgMIP%3A+New+Results+from+Sub-Saharan+Africa+and+South+Asia+Regional+Integrated+Assessments&rft.au=Rosenzweig%2C+Cynthia&rft.aulast=Rosenzweig&rft.aufirst=Cynthia&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 - Building Lasting Impact: Ten Years of the Earth to Sky Interagency Partnership T2 - 47th American Geophysical Union Fall Meeting AN - 1651738140; 6328997 JF - 47th American Geophysical Union Fall Meeting AU - Davis, Anita AU - Lacome, Becky AU - Merrick, Bart AU - Morris, John AU - Paglierani, Ruth AU - Spakoff, Sandy 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/1651738140?accountid=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=Building+Lasting+Impact%3A+Ten+Years+of+the+Earth+to+Sky+Interagency+Partnership&rft.au=Davis%2C+Anita%3BLacome%2C+Becky%3BMerrick%2C+Bart%3BMorris%2C+John%3BPaglierani%2C+Ruth%3BSpakoff%2C+Sandy&rft.aulast=Davis&rft.aufirst=Anita&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 - Investigating Extreme Heat and Humidity in the Northeast United States from a Joint Hazard Perspective T2 - 47th American Geophysical Union Fall Meeting AN - 1651738029; 6334365 JF - 47th American Geophysical Union Fall Meeting AU - Horton, Radley AU - Coffel, Ethan AU - Kushnir, Yochanan Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Hazards KW - USA KW - Heat KW - Humidity KW - Joints UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738029?accountid=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=Investigating+Extreme+Heat+and+Humidity+in+the+Northeast+United+States+from+a+Joint+Hazard+Perspective&rft.au=Horton%2C+Radley%3BCoffel%2C+Ethan%3BKushnir%2C+Yochanan&rft.aulast=Horton&rft.aufirst=Radley&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 - Maintaining the Accuracy of a Sea Surface Height Climate Data Record from Multi-mission Altimeter Data T2 - 47th American Geophysical Union Fall Meeting AN - 1651737856; 6334931 JF - 47th American Geophysical Union Fall Meeting AU - Beckley, Brian AU - Ray, Richard AU - Lemoine, Frank AU - Zelensky, Nikita AU - Yang, Xu AU - Mitchum, Gary AU - Ricko, Martina AU - Desai, Shailen AU - Brown, Shannon Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Data processing KW - Climate KW - Altimeters UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737856?accountid=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=Maintaining+the+Accuracy+of+a+Sea+Surface+Height+Climate+Data+Record+from+Multi-mission+Altimeter+Data&rft.au=Beckley%2C+Brian%3BRay%2C+Richard%3BLemoine%2C+Frank%3BZelensky%2C+Nikita%3BYang%2C+Xu%3BMitchum%2C+Gary%3BRicko%2C+Martina%3BDesai%2C+Shailen%3BBrown%2C+Shannon&rft.aulast=Beckley&rft.aufirst=Brian&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 - Deep Ocean Contribution to Sea Level and Energy Budget Not Detectable over the Past Decade T2 - 47th American Geophysical Union Fall Meeting AN - 1651737736; 6329585 JF - 47th American Geophysical Union Fall Meeting AU - Llovel, William AU - Willis, Josh AU - Landerer, Felix AU - Fukumori, Ichiro Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Sea level KW - Oceans KW - Energy budget UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737736?accountid=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=Deep+Ocean+Contribution+to+Sea+Level+and+Energy+Budget+Not+Detectable+over+the+Past+Decade&rft.au=Llovel%2C+William%3BWillis%2C+Josh%3BLanderer%2C+Felix%3BFukumori%2C+Ichiro&rft.aulast=Llovel&rft.aufirst=William&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Measures Earth System Data Records (ESDR) of Ice Motion in Antarctica: Status, Impact and Future Products T2 - 47th American Geophysical Union Fall Meeting AN - 1651737594; 6334929 JF - 47th American Geophysical Union Fall Meeting AU - Rignot, Eric AU - Scheuchl, Bernd AU - Mouginot, Jeremie Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Ice KW - Data processing KW - Antarctica UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737594?accountid=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=Measures+Earth+System+Data+Records+%28ESDR%29+of+Ice+Motion+in+Antarctica%3A+Status%2C+Impact+and+Future+Products&rft.au=Rignot%2C+Eric%3BScheuchl%2C+Bernd%3BMouginot%2C+Jeremie&rft.aulast=Rignot&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 - NASA COAST and OCEANIA Airborne Missions Support Ecosystem and Water Quality Research in the Coastal Zone T2 - 47th American Geophysical Union Fall Meeting AN - 1651737359; 6334372 JF - 47th American Geophysical Union Fall Meeting AU - Guild, Liane AU - Kudela, Raphael AU - Hooker, Stanford AU - Morrow, John AU - Russell, Philip AU - Palacios, Sherry AU - Livingston, John AU - Negrey, Kendra AU - Torres-Perez, Juan AU - Broughton, Jennifer Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Coastal zone KW - Oceania KW - Water quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737359?accountid=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=NASA+COAST+and+OCEANIA+Airborne+Missions+Support+Ecosystem+and+Water+Quality+Research+in+the+Coastal+Zone&rft.au=Guild%2C+Liane%3BKudela%2C+Raphael%3BHooker%2C+Stanford%3BMorrow%2C+John%3BRussell%2C+Philip%3BPalacios%2C+Sherry%3BLivingston%2C+John%3BNegrey%2C+Kendra%3BTorres-Perez%2C+Juan%3BBroughton%2C+Jennifer&rft.aulast=Guild&rft.aufirst=Liane&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 Giant Planet Satellite Exospheres T2 - 47th American Geophysical Union Fall Meeting AN - 1651737271; 6329499 JF - 47th American Geophysical Union Fall Meeting AU - McGrath, Melissa Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Remote sensing KW - Satellites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737271?accountid=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+Giant+Planet+Satellite+Exospheres&rft.au=McGrath%2C+Melissa&rft.aulast=McGrath&rft.aufirst=Melissa&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 - Extreme space weather studies: Addressing societal needs T2 - 47th American Geophysical Union Fall Meeting AN - 1651737187; 6329801 JF - 47th American Geophysical Union Fall Meeting AU - Ngwira, Chigomezyo Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Weather UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737187?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+the+Inner-Magnetosphere+Ionosphere+with+the+CIMI+Model&rft.au=Fok%2C+Mei-Ching%3BBuzulukova%2C+Natalia%3BChen%2C+Sheng-Hsien%3BGlocer%2C+Alex%3BNagai%2C+Tsugunobu%3BValek%2C+Philip%3BPerez%2C+Joseph&rft.aulast=Fok&rft.aufirst=Mei-Ching&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 - Using satellite fluorescence data to drive a global carbon cycle model: Impacts on atmospheric CO2. T2 - 47th American Geophysical Union Fall Meeting AN - 1651737083; 6334262 JF - 47th American Geophysical Union Fall Meeting AU - Collatz, George AU - Joiner, Joanna AU - Kawa, Stephan AU - Ivanoff, Alvaro AU - Liu, Yuping AU - Yoshida, Yasuko AU - Berry, Joseph AU - Badgley, Grayson Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Energy flow KW - Data processing KW - Fluorescence KW - Carbon cycle KW - Remote sensing KW - Carbon dioxide KW - Satellites KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737083?accountid=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=Using+satellite+fluorescence+data+to+drive+a+global+carbon+cycle+model%3A+Impacts+on+atmospheric+CO2.&rft.au=Collatz%2C+George%3BJoiner%2C+Joanna%3BKawa%2C+Stephan%3BIvanoff%2C+Alvaro%3BLiu%2C+Yuping%3BYoshida%2C+Yasuko%3BBerry%2C+Joseph%3BBadgley%2C+Grayson&rft.aulast=Collatz&rft.aufirst=George&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 Characteristics and Microphysical Pathways for Widespread Substantial Ice Water Content in Deep Convection Outflow T2 - 47th American Geophysical Union Fall Meeting AN - 1651737082; 6329952 JF - 47th American Geophysical Union Fall Meeting AU - Ackerman, Andrew AU - Fridlind, Ann AU - Grandin, Alice AU - Dezitter, Fabien AU - Strapp, J AU - Korolev, Alexei AU - Williams, Christopher Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Convection KW - Ice KW - Outflow KW - Water content UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737082?accountid=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+Characteristics+and+Microphysical+Pathways+for+Widespread+Substantial+Ice+Water+Content+in+Deep+Convection+Outflow&rft.au=Ackerman%2C+Andrew%3BFridlind%2C+Ann%3BGrandin%2C+Alice%3BDezitter%2C+Fabien%3BStrapp%2C+J%3BKorolev%2C+Alexei%3BWilliams%2C+Christopher&rft.aulast=Ackerman&rft.aufirst=Andrew&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 - Evolving Capabilities and Expectations for the GPCP Precipitation Products T2 - 47th American Geophysical Union Fall Meeting AN - 1651737077; 6334928 JF - 47th American Geophysical Union Fall Meeting AU - Huffman, George AU - Adler, Robert AU - Bolvin, David AU - Nelkin, Eric Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Precipitation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651737077?accountid=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=Evolving+Capabilities+and+Expectations+for+the+GPCP+Precipitation+Products&rft.au=Huffman%2C+George%3BAdler%2C+Robert%3BBolvin%2C+David%3BNelkin%2C+Eric&rft.aulast=Huffman&rft.aufirst=George&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 - Remote sensing of water quality and contaminants in the California Bay-Delta T2 - 47th American Geophysical Union Fall Meeting AN - 1651736966; 6334918 JF - 47th American Geophysical Union Fall Meeting AU - Fichot, Cedric AU - Downing, Bryan AU - Windham-Myers, Lisamarie AU - Marvin-DiPasquale, Mark AU - Bergamaschi, Brian AU - Thompson, David AU - Gierach, Michelle Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Remote sensing KW - USA, California KW - Contaminants KW - Water quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651736966?accountid=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=Remote+sensing+of+water+quality+and+contaminants+in+the+California+Bay-Delta&rft.au=Fichot%2C+Cedric%3BDowning%2C+Bryan%3BWindham-Myers%2C+Lisamarie%3BMarvin-DiPasquale%2C+Mark%3BBergamaschi%2C+Brian%3BThompson%2C+David%3BGierach%2C+Michelle&rft.aulast=Fichot&rft.aufirst=Cedric&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 - Global Assimilation of SMOS Brightness Temperatures to Estimate Soil Moisture and Temperature T2 - 47th American Geophysical Union Fall Meeting AN - 1651736928; 6329315 JF - 47th American Geophysical Union Fall Meeting AU - De Lannoy, Gabrielle AU - Reichle, Rolf Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Brightness KW - Temperature KW - Soil temperature KW - Soil moisture KW - Surface radiation temperature UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651736928?accountid=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=Global+Assimilation+of+SMOS+Brightness+Temperatures+to+Estimate+Soil+Moisture+and+Temperature&rft.au=De+Lannoy%2C+Gabrielle%3BReichle%2C+Rolf&rft.aulast=De+Lannoy&rft.aufirst=Gabrielle&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 - Consequences of Kinetic Effects in Nonsymmetric Reconnection Configurations on Large-Scale Dynamical Processes in Magnetosphere and Solar Plasma T2 - 47th American Geophysical Union Fall Meeting AN - 1651736843; 6334498 JF - 47th American Geophysical Union Fall Meeting AU - Kuznetsova, Maria AU - Hesse, Michael AU - Aunai, Nicolas AU - Wendel, Deirdre AU - Rastaetter, Lutz AU - Glocer, Alex AU - Toth, Gabor Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Kinetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651736843?accountid=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=Consequences+of+Kinetic+Effects+in+Nonsymmetric+Reconnection+Configurations+on+Large-Scale+Dynamical+Processes+in+Magnetosphere+and+Solar+Plasma&rft.au=Kuznetsova%2C+Maria%3BHesse%2C+Michael%3BAunai%2C+Nicolas%3BWendel%2C+Deirdre%3BRastaetter%2C+Lutz%3BGlocer%2C+Alex%3BToth%2C+Gabor&rft.aulast=Kuznetsova&rft.aufirst=Maria&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 - Effects of absorbing aerosols on intraseasonal variability of the Indian Monsoon T2 - 47th American Geophysical Union Fall Meeting AN - 1651736594; 6328884 JF - 47th American Geophysical Union Fall Meeting AU - Lau, William AU - Kim, Kyu-Myong AU - Tao, Wei-Kuo AU - Shi, Jainn AU - Chin, Mian Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Aerosols KW - Monsoons UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651736594?accountid=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=Effects+of+absorbing+aerosols+on+intraseasonal+variability+of+the+Indian+Monsoon&rft.au=Lau%2C+William%3BKim%2C+Kyu-Myong%3BTao%2C+Wei-Kuo%3BShi%2C+Jainn%3BChin%2C+Mian&rft.aulast=Lau&rft.aufirst=William&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Assimilation of GMI level-1C radiance and DPR level-2A reflectivity in the Goddard WRF Ensemble Data Assimilation System T2 - 47th American Geophysical Union Fall Meeting AN - 1651736531; 6328718 JF - 47th American Geophysical Union Fall Meeting AU - Zhang, Sara AU - Zupanski, Milija AU - Cheung, Samson Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Radiance KW - Data collection KW - Data processing KW - Reflectance UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651736531?accountid=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=Assimilation+of+GMI+level-1C+radiance+and+DPR+level-2A+reflectivity+in+the+Goddard+WRF+Ensemble+Data+Assimilation+System&rft.au=Zhang%2C+Sara%3BZupanski%2C+Milija%3BCheung%2C+Samson&rft.aulast=Zhang&rft.aufirst=Sara&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 - JPSS Science Data Services for the Direct Readout Community T2 - 47th American Geophysical Union Fall Meeting AN - 1651736463; 6328420 JF - 47th American Geophysical Union Fall Meeting AU - Chander, Gyanesh AU - Lutz, Robert Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651736463?accountid=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=JPSS+Science+Data+Services+for+the+Direct+Readout+Community&rft.au=Chander%2C+Gyanesh%3BLutz%2C+Robert&rft.aulast=Chander&rft.aufirst=Gyanesh&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 - Methane, carbon monoxide, and ammonia in brown dwarfs and self-luminous giant planets AN - 1832593598; 720619-41 AB - We address disequilibrium abundances of some simple molecules in the atmospheres of solar composition brown dwarfs and self-luminous extrasolar giant planets using a kinetics-based one-dimensional atmospheric chemistry model. Our approach is to use the full kinetics model to survey the parameter space with effective temperatures between 500 K and 1100 K. In all of these worlds, equilibrium chemistry favors CH (sub 4) over CO in the parts of the atmosphere that can be seen from Earth, but in most disequilibrium favors CO. The small surface gravity of a planet strongly discriminates against CH (sub 4) when compared to an otherwise comparable brown dwarf. If vertical mixing is like Jupiter's, the transition from methane to CO occurs at 500 K in a planet. Sluggish vertical mixing can raise this to 600 K, but clouds or more vigorous vertical mixing could lower this to 400 K. The comparable thresholds in brown dwarfs are 1100 + or - 100 K. Ammonia is also sensitive to gravity, but, unlike CH (sub 4) /CO, the NH (sub 3) /N (sub 2) ratio is insensitive to mixing, which makes NH (sub 3) a potential proxy for gravity. HCN may become interesting in high-gravity brown dwarfs with very strong vertical mixing. Detailed analysis of the CO-CH (sub 4) reaction network reveals that the bottleneck to CO hydrogenation goes through methanol, in partial agreement with previous work. Simple, easy to use quenching relations are derived by fitting to the complete chemistry of the full ensemble of models. These relations are valid for determining CO, CH (sub 4) , NH (sub 3) , HCN, and CO (sub 2) abundances in the range of self-luminous worlds we have studied, but may not apply if atmospheres are strongly heated at high altitudes by processes not considered here (e.g., wave breaking). Copyright Contribution of the National Aeronautics and Space Administration (NASA); not subject to copyright in the United States JF - The Astrophysical Journal AU - Zahnle, Kevin J AU - Marley, Mark S Y1 - 2014/12/10/ PY - 2014 DA - 2014 Dec 10 EP - Paper no. 41 PB - IOP Publishing for American Astronomical Society, Bristol VL - 797 IS - 1 SN - 0004-637X, 0004-637X KW - clouds KW - ammonium KW - methane KW - extrasolar planets KW - one-dimensional models KW - photochemistry KW - aliphatic hydrocarbons KW - atmosphere KW - alkanes KW - quenching KW - temperature KW - giant planets KW - models KW - planets KW - carbon monoxide KW - volatiles KW - organic compounds KW - chemical reactions KW - brown dwarfs KW - hydrocarbons KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832593598?accountid=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=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=The+Value+of+Analog+Research+in+the+Search+for+Life&rft.au=Voytek%2C+Mary&rft.aulast=Voytek&rft.aufirst=Mary&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 - 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 - 60 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; ammonium; atmosphere; brown dwarfs; carbon monoxide; chemical reactions; clouds; extrasolar planets; giant planets; hydrocarbons; methane; models; one-dimensional models; organic compounds; photochemistry; planets; quenching; temperature; volatiles DO - http://dx.doi.org/10.1088/0004-637X/797/1/41 ER - TY - JOUR T1 - Thermo-electrochemical analysis of lithium ion batteries for space applications using Thermal Desktop AN - 1622611804; 20842605 AB - Lithium-ion batteries (LIBs) are replacing the Nickel-Hydrogen batteries used on the International Space Station (1SS). Knowing that LIB efficiency and survivability are greatly influenced by temperature, this study focuses on the thermo-electrochemical analysis of LIBs in space orbit. Current finite element modeling software allows for advanced simulation of the thermo-electrochemical processes; however the heat transfer simulation capabilities of said software suites do not allow for the extreme complexities of orbital-space environments like those experienced by the ISS. In this study, we have coupled the existing thermo-electrochemical models representing heat generation in LIBs during discharge cycles with specialized orbital-thermal software, Thermal Desktop (TD). Our model's parameters were obtained from a previous thermo-electrochemical model of a 185 Amp-Hour (Ah) LIB with 1-3 C (C) discharge cycles for both forced and natural convection environments at 300 K. Our TD model successfully simulates the temperature vs. depth-of-discharge (DOD) profiles and temperature ranges for all discharge and convection variations with minimal deviation through the programming of FORTRAN logic representing each variable as a function of relationship to DOD. Multiple parametrics were considered in a second and third set of cases whose results display vital data in advancing our understanding of accurate thermal modeling of LIBs. JF - Journal of Power Sources AU - Walker, W AU - Ardebili, H AD - Department of Mechanical Engineering, University of Houston, 4800 Calhoun Road, Houston, TX 77004-4006, USA, william.walker@nasa.gov Y1 - 2014/12/10/ PY - 2014 DA - 2014 Dec 10 SP - 486 EP - 497 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 269 SN - 0378-7753, 0378-7753 KW - Environment Abstracts KW - Thermo-electrochemical modeling KW - Lithium-ion batteries KW - Space applications KW - Orbital thermal environments KW - Convection KW - Finite element method KW - Computer programs KW - Batteries KW - Temperature KW - Simulation KW - Lithium KW - Heat transfer KW - ENA 08:International UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622611804?accountid=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=Thermo-electrochemical+analysis+of+lithium+ion+batteries+for+space+applications+using+Thermal+Desktop&rft.au=Walker%2C+W%3BArdebili%2C+H&rft.aulast=Walker&rft.aufirst=W&rft.date=2014-12-10&rft.volume=269&rft.issue=&rft.spage=486&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/10.1016%2Fj.jpowsour.2014.07.020 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Finite element method; Convection; Computer programs; Batteries; Temperature; Simulation; Lithium; Heat transfer DO - http://dx.doi.org/10.1016/j.jpowsour.2014.07.020 ER - TY - CPAPER T1 - Homozygosity for Killer Immunoglobin-like Receptor (KIR) Haplotype a Is Associated to Negative Interim Positron Emission Tomography (PET) and a Favourable Outcome in Hodgkin Lymphoma T2 - 56th Annual Meeting of the American Society of Hematology (ASH 2014) AN - 1647638806; 6327553 JF - 56th Annual Meeting of the American Society of Hematology (ASH 2014) AU - Caocci, Giovanni AU - Littera, Roberto AU - Oppi, Sara AU - Greco, Marianna AU - Celeghini, Ivana AU - Caria, Rossella AU - Lai, Sara AU - Orru, Nicola AU - Martino, Massimo AU - Carcassi, Carlo AU - Gallamini, Andrea AU - La Nasa, Giorgio Y1 - 2014/12/06/ PY - 2014 DA - 2014 Dec 06 KW - Hodgkin's disease KW - Haplotypes KW - Positron emission tomography KW - Emissions KW - Homozygosity KW - Lymphoma UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1647638806?accountid=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=56th+Annual+Meeting+of+the+American+Society+of+Hematology+%28ASH+2014%29&rft.atitle=Homozygosity+for+Killer+Immunoglobin-like+Receptor+%28KIR%29+Haplotype+a+Is+Associated+to+Negative+Interim+Positron+Emission+Tomography+%28PET%29+and+a+Favourable+Outcome+in+Hodgkin+Lymphoma&rft.au=Caocci%2C+Giovanni%3BLittera%2C+Roberto%3BOppi%2C+Sara%3BGreco%2C+Marianna%3BCeleghini%2C+Ivana%3BCaria%2C+Rossella%3BLai%2C+Sara%3BOrru%2C+Nicola%3BMartino%2C+Massimo%3BCarcassi%2C+Carlo%3BGallamini%2C+Andrea%3BLa+Nasa%2C+Giorgio&rft.aulast=Caocci&rft.aufirst=Giovanni&rft.date=2014-12-06&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=56th+Annual+Meeting+of+the+American+Society+of+Hematology+%28ASH+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ash.confex.com/ash/2014/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-31 N1 - Last updated - 2015-01-23 ER - TY - NEWS T1 - Crew Module Cabin the Focus for Weekend AN - 1630343328 JF - UPI Space Daily AU - Stephen Fox at https://blogs.nasa.gov/orion/ Orion blog Y1 - 2014/12/04/ PY - 2014 DA - 2014 Dec 04 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1630343328?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Crew+Module+Cabin+the+Focus+for+Weekend&rft.au=Waliser%2C+Duane%3BMani%2C+Neena%3BWang%2C+Bin%3BJiang%2C+Xianan%3BLee%2C+June-yi%3BLee%2C+sun-Seon&rft.aulast=Waliser&rft.aufirst=Duane&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/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-12-05 ER - TY - JOUR T1 - Microchemical and structural evidence for space weathering in soils from asteroid Itokawa AN - 1832679076; 696831-57 AB - Here we report microchemical and microstructural features indicative of space weathering in a particle returned from the surface of asteroid Itokawa by the Hayabusa mission. Space weathering features include partially and completely amorphous rims, chemically and structurally heterogeneous multilayer rims, amorphous surface islands, vesiculated rim textures, and nanophase iron particles. Solar-wind irradiation is likely responsible for the amorphization as well as the associated vesiculation of grain rims. The multilayer rims contain a nanocrystalline outer layer that is underlain by an amorphous inner layer, and both have compositions that are distinct from the underlying, crystalline orthopyroxene grain. The multilayer rim features could be derived from either radiation-induced sputter deposition or vapor deposition from micrometeorite impact events. The amorphous islands on grain surfaces have a distinctive morphology and composition suggesting that they represent surface deposits of melt derived from micrometeorite impact events. These observations indicate that both irradiation damage and micrometeorite impacts play a role in surface modification and space weathering on asteroid Itokawa. Copyright 2014 The Author(s) and Thompson et al.; licensee Springer. JF - Earth, Planets and Space AU - Thompson, Michelle S AU - Christoffersen, Roy AU - Zega, Thomas J AU - Keller, Lindsay P Y1 - 2014/12// PY - 2014 DA - December 2014 EP - Paper no. 89 PB - Terra Scientific Publishing Company (TERRAPUB), Tokyo VL - 66 IS - 1 SN - 1343-8832, 1343-8832 KW - silicates KW - irradiation KW - asteroids KW - solar wind KW - microstructure KW - iron KW - meteorites KW - pyroxene group KW - Hayabusa Mission KW - spectra KW - chemical composition KW - chain silicates KW - vesicular texture KW - soils KW - Itokawa Asteroid KW - amorphous materials KW - textures KW - electron microscopy data KW - impacts KW - X-ray spectra KW - weathering KW - TEM data KW - EDS spectra KW - morphology KW - micrometeorites KW - space weathering KW - metals KW - S-type asteroids KW - orthopyroxene KW - nanophase iron KW - nanoparticles KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832679076?accountid=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%2C+Planets+and+Space&rft.atitle=Microchemical+and+structural+evidence+for+space+weathering+in+soils+from+asteroid+Itokawa&rft.au=Thompson%2C+Michelle+S%3BChristoffersen%2C+Roy%3BZega%2C+Thomas+J%3BKeller%2C+Lindsay+P&rft.aulast=Thompson&rft.aufirst=Michelle&rft.date=2014-12-01&rft.volume=66&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Earth%2C+Planets+and+Space&rft.issn=13438832&rft_id=info:doi/10.1186%2F1880-5981-66-89 L2 - http://www.terrapub.co.jp/journals/EPS/ 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 - 31 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - amorphous materials; asteroids; chain silicates; chemical composition; EDS spectra; electron microscopy data; Hayabusa Mission; impacts; iron; irradiation; Itokawa Asteroid; metals; meteorites; micrometeorites; microstructure; morphology; nanoparticles; nanophase iron; orthopyroxene; pyroxene group; S-type asteroids; silicates; soils; solar wind; space weathering; spectra; TEM data; textures; vesicular texture; weathering; X-ray spectra DO - http://dx.doi.org/10.1186/1880-5981-66-89 ER - TY - JOUR T1 - A transmission electron microscope study of Itokawa regolith grains AN - 1832678986; 696831-39 AB - Analyses of two olivine-rich particles from asteroid 25143 Itokawa returned by the Hayabusa mission (RA-QD02-0125 and RA-QD02-0211) show evidence for space weathering processes that occurred in the Itokawa regolith. Submicrometer impact-derived crystalline and glassy grains are observed adhering to the surfaces of the particles, including albite, orthopyroxene, olivine, augite, pyrrhotite, troilite, melt splashes, and melt spherules. Both particles are surrounded by 50- to 100-nm-thick disordered rims that are nanocrystalline, not amorphous, and compositionally similar to the grain cores. A pyrrhotite grain attached to RA-QD02-0125 also shows a disordered rim that is sulfur-depleted with nanophase Fe metal grains decorating the outermost surface. The structurally disordered rims on the Hayabusa particles likely result from atomic displacement damage from solar wind ions given the similarity of the rim thickness compared to the implantation depth of solar wind ions. The outermost few nanometers of the disordered rims are more Si-rich and Mg- and Fe-depleted relative to the cores of the grains and likely represent a minor accumulation of impact-generated vapors or sputter deposits. Nanophase Fe metal particles are present in the rim on RA-QD02-0211 but were not detected in the rim on RA-QD02-0125. Solar flare particle tracks are observed in RA-QD02-0211 but were not observed in RA-QD02-0125, suggesting short surface exposure times for the particles, on the order of approximately 10 (super 3) to 10 (super 4) years. This result implies that the optical effects of space weathering develop far more rapidly than was previously recognized. Copyright 2014 The Author(s) and Keller and Berger; licensee Springer. JF - Earth, Planets and Space AU - Keller, Lindsay P AU - Berger, Eve L Y1 - 2014/12// PY - 2014 DA - December 2014 EP - Paper no. 71 PB - Terra Scientific Publishing Company (TERRAPUB), Tokyo VL - 66 IS - 1 SN - 1343-8832, 1343-8832 KW - silicates KW - magnesium KW - irradiation KW - asteroids KW - solar wind KW - microstructure KW - olivine group KW - silicon KW - iron KW - meteorites KW - Hayabusa Mission KW - olivine KW - orthosilicates KW - pyrrhotite KW - depletion KW - alkaline earth metals KW - Itokawa Asteroid KW - electron microscopy data KW - impacts KW - weathering KW - TEM data KW - order-disorder KW - nesosilicates KW - micrometeorites KW - space weathering KW - metals KW - sulfur KW - S-type asteroids KW - nanophase iron KW - sulfides KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832678986?accountid=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%2C+Planets+and+Space&rft.atitle=A+transmission+electron+microscope+study+of+Itokawa+regolith+grains&rft.au=Keller%2C+Lindsay+P%3BBerger%2C+Eve+L&rft.aulast=Keller&rft.aufirst=Lindsay&rft.date=2014-12-01&rft.volume=66&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Earth%2C+Planets+and+Space&rft.issn=13438832&rft_id=info:doi/10.1186%2F1880-5981-66-71 L2 - http://www.terrapub.co.jp/journals/EPS/ 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 - 20 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; asteroids; depletion; electron microscopy data; Hayabusa Mission; impacts; iron; irradiation; Itokawa Asteroid; magnesium; metals; meteorites; micrometeorites; microstructure; nanophase iron; nesosilicates; olivine; olivine group; order-disorder; orthosilicates; pyrrhotite; regolith; S-type asteroids; silicates; silicon; solar wind; space weathering; sulfides; sulfur; TEM data; weathering DO - http://dx.doi.org/10.1186/1880-5981-66-71 ER - TY - JOUR T1 - Mineralogy and crystallography of some Itokawa particles returned by the Hayabusa asteroidal sample return mission AN - 1832648401; 696831-55 AB - We studied seven Itokawa particles provided by the Japan Aerospace Exploration Agency (JAXA) as first International Announcement of Opportunity (AO) study mainly using electron and synchrotron radiation X-ray beam techniques. All the analyzed particles were collected from the first-touchdown site and composed of olivine and plagioclase with traces of Ca phosphate and chromite, and do not contain pyroxenes. Optical microscopy of these particles shows minor undulatory extinction of olivine and plagioclase, suggesting minor shock metamorphism (shock stage: S2). The electron microprobe analysis shows that olivine is Fo (sub 70-73) and plagioclase is An (sub 13-10) Or (sub 5-7) . The synchrotron radiation X-ray diffraction (SR-XRD) analysis of olivine crystals gives cell dimensions of a = 4.708 to 4.779 Aa, b = 10.271 to 10.289 Aa, c = 6.017 to 6.024 Aa, corresponding to the Fo content of Fo (sub nearly equal 70) by Vegard's law. This composition matches the result obtained by the electron microprobe analysis. The olivine compositions of the analyzed particles are consistent with those of LL chondrites. The cell dimensions of two plagioclase crystals (a = 8.180 to 8.194 Aa, b = 12.53 to 12.893 Aa, c = 7.125 to 7.23 Aa, alpha = 92.6 degrees to 93.00 degrees , beta = 116.36 degrees to 116.75 degrees , gamma = 90.03 degrees to 90.17 degrees ) indicate that their equilibration temperatures are 800 degrees C + or - 10 degrees C. This temperature is near the peak metamorphic temperature recorded by equilibrated ordinary chondrites. The size of plagioclase crystals and the homogeneity of olivine compositions indicate that their petrologic type is > or =5. We also analyzed plagioclase by SR iron X-ray absorption near-edge structure (SR-XANES) and found that its Fe (super 3+) /(Fe (super 2+) + Fe (super 3+) ) ratio is approximately 0.5. Such high Fe (super 3+) abundance indicates the formation under a relatively oxidizing environment. Thus, all these analyses have reconfirmed that the Itokawa particles returned by the Hayabusa spacecraft are very weakly shocked equilibrated LL chondrites, which matches the results of the preliminary examination team. Copyright 2014 The Author(s) and Mikouchi et al.; licensee Springer. JF - Earth, Planets and Space AU - Mikouchi, Takashi AU - Komatsu, Mutsumi AU - Hagiya, Kenji AU - Ohsumi, Kazumasa AU - Zolensky, Michael E AU - Hoffmann, Viktor AU - Martinez, James AU - Hochleitner, Rupert AU - Kaliwoda, Melanie AU - Terada, Yasuko AU - Yagi, Naoto AU - Takata, Masaki AU - Satake, Wataru AU - Aoyagi, Yuya AU - Takenouchi, Atsushi AU - Karouji, Yuzuru AU - Uesugi, Masayuki AU - Yada, Toru Y1 - 2014/12// PY - 2014 DA - December 2014 EP - Paper no. 82 PB - Terra Scientific Publishing Company (TERRAPUB), Tokyo VL - 66 IS - 1 SN - 1343-8832, 1343-8832 KW - silicates KW - ordinary chondrites KW - stony meteorites KW - asteroids KW - X-ray diffraction data KW - olivine group KW - thermal history KW - iron KW - electron probe data KW - XANES spectra KW - synchrotron radiation KW - meteorites KW - ferric iron KW - mineral composition KW - Hayabusa Mission KW - olivine KW - orthosilicates KW - oxides KW - framework silicates KW - spectra KW - chondrites KW - cell dimensions KW - plagioclase KW - Itokawa Asteroid KW - LL chondrites KW - chromite KW - phosphates KW - metamorphism KW - X-ray spectra KW - nesosilicates KW - metals KW - S-type asteroids KW - feldspar group KW - shock metamorphism KW - particles KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832648401?accountid=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%2C+Planets+and+Space&rft.atitle=Mineralogy+and+crystallography+of+some+Itokawa+particles+returned+by+the+Hayabusa+asteroidal+sample+return+mission&rft.au=Mikouchi%2C+Takashi%3BKomatsu%2C+Mutsumi%3BHagiya%2C+Kenji%3BOhsumi%2C+Kazumasa%3BZolensky%2C+Michael+E%3BHoffmann%2C+Viktor%3BMartinez%2C+James%3BHochleitner%2C+Rupert%3BKaliwoda%2C+Melanie%3BTerada%2C+Yasuko%3BYagi%2C+Naoto%3BTakata%2C+Masaki%3BSatake%2C+Wataru%3BAoyagi%2C+Yuya%3BTakenouchi%2C+Atsushi%3BKarouji%2C+Yuzuru%3BUesugi%2C+Masayuki%3BYada%2C+Toru&rft.aulast=Mikouchi&rft.aufirst=Takashi&rft.date=2014-12-01&rft.volume=66&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Earth%2C+Planets+and+Space&rft.issn=13438832&rft_id=info:doi/10.1186%2F1880-5981-66-82 L2 - http://www.terrapub.co.jp/journals/EPS/ 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 - 31 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - asteroids; cell dimensions; chondrites; chromite; electron probe data; feldspar group; ferric iron; framework silicates; Hayabusa Mission; iron; Itokawa Asteroid; LL chondrites; metals; metamorphism; meteorites; mineral composition; nesosilicates; olivine; olivine group; ordinary chondrites; orthosilicates; oxides; particles; phosphates; plagioclase; S-type asteroids; shock metamorphism; silicates; spectra; stony meteorites; synchrotron radiation; thermal history; X-ray diffraction data; X-ray spectra; XANES spectra DO - http://dx.doi.org/10.1186/1880-5981-66-82 ER - TY - JOUR T1 - Molecular crowding and early evolution AN - 1832586407; 743110-12 AB - The environment of protocells might have been crowded with small molecules and functional and non-specific polymers. In addition to altering conformational equilibria, affecting reaction rates and changing the structure and activity of water, crowding might have enhanced the capabilities of protocells for evolutionary innovation through the creation of extended neutral networks in the fitness landscape. Copyright 2015 Springer Science+Business Media Dordrecht JF - Origins of Life and Evolution of the Biosphere AU - Saha, Ranajay AU - Pohorille, Andrew AU - Chen, Irene A Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 319 EP - 324 PB - Springer, Dordrecht VL - 44 IS - 4 SN - 0169-6149, 0169-6149 KW - molecular crowding KW - nucleic acids KW - RNA KW - chemical reactions KW - protocells KW - theoretical models KW - biologic evolution KW - vesicles KW - neural networks KW - polymers KW - life origin KW - 08:General paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832586407?accountid=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=Origins+of+Life+and+Evolution+of+the+Biosphere&rft.atitle=Molecular+crowding+and+early+evolution&rft.au=Saha%2C+Ranajay%3BPohorille%2C+Andrew%3BChen%2C+Irene+A&rft.aulast=Saha&rft.aufirst=Ranajay&rft.date=2014-12-01&rft.volume=44&rft.issue=4&rft.spage=319&rft.isbn=&rft.btitle=&rft.title=Origins+of+Life+and+Evolution+of+the+Biosphere&rft.issn=01696149&rft_id=info:doi/10.1007%2Fs11084-014-9392-3 L2 - http://link.springer.com/journal/11084 LA - English DB - GeoRef N1 - Conference title - Open questions on the origin of life 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 - 37 N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - biologic evolution; chemical reactions; life origin; molecular crowding; neural networks; nucleic acids; polymers; protocells; RNA; theoretical models; vesicles DO - http://dx.doi.org/10.1007/s11084-014-9392-3 ER - TY - JOUR T1 - An updated treatment of soil texture and associated hydraulic properties in a global land modeling system AN - 1832582852; 722759-1 AB - The advent of new data sets describing soil texture and associated soil properties offers the promise of improved hydrological simulation. Here we describe the composition of a new soil texture data set and its implementation into a specific land surface modeling system, namely, the Catchment land surface model (LSM) of the NASA Goddard Earth Observing System version 5 (GEOS-5) modeling and assimilation framework. First, global soil texture composites are generated using data from the Harmonized World Soil Database version 1.21 (HWSD1.21) and the State Soil Geographic (STATSGO2) project, with explicit consideration of different levels of organic material. Then, the LSM's soil parameters are upgraded using the new texture data, with hydraulic parameters derived for the more extensive set of texture classes using pedotransfer functions. Other changes to the LSM parameters are included to further support simulations at increasingly fine resolutions. A suite of simulations with the original and new parameter versions shows modest yet significant improvements in the Catchment LSM's simulation of soil moisture and surface hydrological fluxes. The revised LSM parameters will be used for the forthcoming Soil Moisture Active Passive (SMAP) soil moisture assimilation product. Abstract Copyright (2014), The Authors. JF - Journal of Advances in Modeling Earth Systems AU - De Lannoy, Gabrielle J M AU - Koster, Randal D AU - Reichle, Rolf H AU - Mahanama, Sarith P P AU - Liu, Qing Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 957 EP - 979 PB - Wiley for Institute of Global Environment and Society, Calverton, MD VL - 6 IS - 4 KW - clay KW - topsoil KW - hydraulics KW - moisture KW - data processing KW - rhizosphere KW - STATSGO2 KW - GEOS-5 KW - simulation KW - carbon KW - sediments KW - retention KW - drainage basins KW - data bases KW - neural networks KW - horizons KW - organic carbon KW - baseline studies KW - soils KW - hydrology KW - soil mechanics KW - sand KW - bulk density KW - in situ KW - clastic sediments KW - grain size KW - global KW - statistical analysis KW - equations KW - land surface model KW - distribution KW - artificial intelligence KW - pedotransfer functions KW - HWSD1.21 KW - 30:Engineering geology KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832582852?accountid=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+Advances+in+Modeling+Earth+Systems&rft.atitle=An+updated+treatment+of+soil+texture+and+associated+hydraulic+properties+in+a+global+land+modeling+system&rft.au=De+Lannoy%2C+Gabrielle+J+M%3BKoster%2C+Randal+D%3BReichle%2C+Rolf+H%3BMahanama%2C+Sarith+P+P%3BLiu%2C+Qing&rft.aulast=De+Lannoy&rft.aufirst=Gabrielle+J&rft.date=2014-12-01&rft.volume=6&rft.issue=4&rft.spage=957&rft.isbn=&rft.btitle=&rft.title=Journal+of+Advances+in+Modeling+Earth+Systems&rft.issn=1942-2466&rft_id=info:doi/10.1002%2F2014MS000330 L2 - http://agupubs.onlinelibrary.wiley.com/agu/journal/10.1002/(ISSN)1942-2466/ 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 - 71 N1 - PubXState - MD N1 - Document feature - illus. incl. 5 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - artificial intelligence; baseline studies; bulk density; carbon; clastic sediments; clay; data bases; data processing; distribution; drainage basins; equations; GEOS-5; global; grain size; horizons; HWSD1.21; hydraulics; hydrology; in situ; land surface model; moisture; neural networks; organic carbon; pedotransfer functions; retention; rhizosphere; sand; sediments; simulation; soil mechanics; soils; statistical analysis; STATSGO2; topsoil DO - http://dx.doi.org/10.1002/2014MS000330 ER - TY - JOUR T1 - On the electron diffusion region in planar, asymmetric, systems AN - 1808379580; PQ0002651763 AB - Particle-in-cell simulations and analytical theory are employed to study the electron diffusion region in asymmetric reconnection, which is taking place in planar configurations without a guide field. The analysis presented here focuses on the nature of the local reconnection electric field and on differences from symmetric configurations. Further emphasis is on the complex structure of the electron distribution in the diffusion region, which is generated by the mixing of particles from different sources. We find that the electric field component that is directly responsible for flux transport is provided not by electron pressure-based, "quasi-viscous," terms but by inertial terms. The quasi-viscous component is shown to be critical in that it is necessary to sustain the required overall electric field pattern in the immediate neighborhood of the reconnection X line. Key Points * Magnetic reconnection in asymmetric systems is much more complicated * The reconnection electric field is given by electron inertia * The electron distribution function structure is critical JF - Geophysical Research Letters AU - Hesse, Michael AU - Aunai, Nicolas AU - Sibeck, David AU - Birn, Joachim AD - Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 8673 EP - 8680 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 41 IS - 24 SN - 0094-8276, 0094-8276 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Simulation Analysis KW - Electric fields KW - Planning KW - Electric Fields KW - Identification KW - Sedimentation KW - Fluctuations KW - Identification keys KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808379580?accountid=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=On+the+electron+diffusion+region+in+planar%2C+asymmetric%2C+systems&rft.au=Hesse%2C+Michael%3BAunai%2C+Nicolas%3BSibeck%2C+David%3BBirn%2C+Joachim&rft.aulast=Hesse&rft.aufirst=Michael&rft.date=2014-12-01&rft.volume=41&rft.issue=24&rft.spage=8673&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL061586 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Electric fields; Planning; Sedimentation; Identification; Identification keys; Simulation Analysis; Electric Fields; Fluctuations DO - http://dx.doi.org/10.1002/2014GL061586 ER - TY - JOUR T1 - Following up on the discovery of water vapor at Europa's south pole with HST AN - 1769967984; 2016-018078 AB - We will present new Hubble Space Telescope (HST) observations of Europa's UV aurora obtained within two campaigns in 2014 to follow up on the water vapor plume detection. HST aurora images taken in 2012 have revealed coincident signals from atomic hydrogen and oxygen pointing to the existence of transient water vapor plumes near the south pole. The water vapor was detected only during one HST visit in December 2012 when Europa was near apocenter position and was speculated to be correlated with changing tidal stresses along Europa's orbit. In a first follow-up campaign new aurora images were taken by HST early in 2014 with Europa near apocenter, but the initial detection was not confirmed. More HST aurora images will be obtained in the course of a larger Hubble observing campaign starting in November 2014. We will review all HST aurora imaging observations to date and discuss potential sources for varying plume activity and changing detectability by HST. In particular, we will examine various explanations for the non-detections in the early 2014 observations near apocenter. JF - American Geophysical Union Fall Meeting AU - Roth, L AU - Retherford, K D AU - Saur, J AU - Strobel, D F AU - Feldman, P D AU - McGrath, M A AU - Nimmo, F AU - Spencer, J R AU - Grava, C AU - Bloecker, A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P52A EP - 05 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/1769967984?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Following+up+on+the+discovery+of+water+vapor+at+Europa%27s+south+pole+with+HST&rft.au=Roth%2C+L%3BRetherford%2C+K+D%3BSaur%2C+J%3BStrobel%2C+D+F%3BFeldman%2C+P+D%3BMcGrath%2C+M+A%3BNimmo%2C+F%3BSpencer%2C+J+R%3BGrava%2C+C%3BBloecker%2C+A%3BAnonymous&rft.aulast=Roth&rft.aufirst=L&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - 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 - The Na exosphere reservoir for Mercury and the Moon; models constrained by MESSENGER and LADEE data AN - 1769967975; 2016-017853 AB - The Na exosphere of Mercury is flux-limited, and a careful accounting of the surface reservoir is necessary in order to understand the relative importance of proposed source mechanisms for this exosphere. At the Moon, a similar analysis has not yet been performed, but recent data acquired by the Kaguya spacecraft suggest an analogous depletion of the dayside reservoir for exospheric Na. New measurements of the lunar exosphere obtained by the Lunar Atmosphere and Dust Environment Explorer (LADEE) and of Mercury's exosphere by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft provide the opportunity to constrain the main parameters determining the reservoirs for these exospheres. We present a model of the exosphere-surface system that attempts to unify these two datasets. We have developed a simulator that accepts as input partially constrained microphysical parameters of the gas-surface interaction (e.g., source rates/cross sections for different source processes, degree of thermal accommodation) to make testable predictions regarding the exosphere and uppermost surface (top 10-10 m). These flux-balance simulations demonstrate that the lunar exosphere is limited by the recycling rate of Na atoms mobilized by micrometeoroid vaporization. An important consequence is that, to obtain consistency with ground-based observations of the Na exosphere, the inferred impact vapor at the Moon must peak near the equator and decrease towards the poles because of migration of surface particles toward the poles through exospheric transport. Micrometeoroid streams can have a long-term effect on the lunar exosphere because, as shown in our model, particles introduced by such streams survive in the soil and exosphere for at least two lunations. Important but secondary effects must be provided by the solar wind in order to account for the variations observed within one lunation by LADEE. In its application to Mercury, the code uses new estimates of the micrometeoroid impact vaporization rate and solar wind influx onto Mercury's high-latitude regions. We demonstrate that a model similar to that for the Moon can approximately reproduce the near-surface densities and the dawn-dusk asymmetry in the Na exosphere observed by MESSENGER during part of a Mercury year. JF - American Geophysical Union Fall Meeting AU - Sarantos, M AU - Killen, R M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23C EP - 3998 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/1769967975?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+Na+exosphere+reservoir+for+Mercury+and+the+Moon%3B+models+constrained+by+MESSENGER+and+LADEE+data&rft.au=Sarantos%2C+M%3BKillen%2C+R+M%3BAnonymous&rft.aulast=Sarantos&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 - The RIMFAX ground penetrating radar on the Mars 2020 rover AN - 1769967957; 2016-017800 AB - The Radar Imager for Mars' Subsurface Exploration - RIMFAX is a Ground Penetrating Radar selected for NASA's Mars 2020 rover mission. RIMFAX will add a new dimension to the rover's toolset by providing the capability to image the shallow subsurface beneath the rover. The principal goals of the RIMFAX investigation are to image subsurface layering and structure, and to provide information regarding subsurface composition. Depending on materials, RIMFAX will image the subsurface stratigraphy to maximum depths of 10 to 500 meters, with vertical resolutions of 5 to 20 cm, with a horizontal sampling distance of 2 to 20 cm along the rover track. The resulting radar cross sections will provide important information on the geological context of surface outcrops as well as the geological and environmental history of the field area. The radar uses a Gated FMCW waveform and a single ultra wideband antenna that is used both for transmitting and receiving. The presentation will give an overview of the RIMFAX investigation, the radar system and show experimental results from a prototype radar. JF - American Geophysical Union Fall Meeting AU - Hamran, S E AU - Amundsen, H E F AU - Carter, L M AU - Ghent, R R AU - Kohler, J AU - Mellon, M T AU - Paige, D A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11A EP - 3746 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/1769967957?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+RIMFAX+ground+penetrating+radar+on+the+Mars+2020+rover&rft.au=Hamran%2C+S+E%3BAmundsen%2C+H+E+F%3BCarter%2C+L+M%3BGhent%2C+R+R%3BKohler%2C+J%3BMellon%2C+M+T%3BPaige%2C+D+A%3BAnonymous&rft.aulast=Hamran&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Observation of high density plasma in the vicinity of Europa and its potential relationship with plume activity AN - 1769967955; 2016-018081 AB - During the course of the Galileo Mission at Jupiter, the spacecraft obtained high-resolution observations of plasmas during 8 near encounters with Europa. Most typically, these encounters provided evidence of modest production of plasma within Europa's exosphere, with ion densities comparable to that of the plasma sheet. However, plasma densities significantly greater than those of the surrounding plasma sheet were seen during two encounters. Once, as the spacecraft traversed the moon's near-downstream wake with respect to the prevailing flow of Jupiter's plasma sheet/plasma torus. Densities were several times higher than those of the plasma sheet, and entrainment of Europa's ionosphere accounts for this observation. The other encounter occurred in the upstream region. Densities were an order of magnitude higher than usual, and this has been interpreted as potential evidence of ionization within a water plume. However, the usual signatures of fresh ion production that would be expected in a plume are not found in the ion energy-angle spectra. The observations and possible explanations are presented in this report. JF - American Geophysical Union Fall Meeting AU - Paterson, William R AU - Sittler, E C, Jr AU - Cooper, J F AU - Hartle, R E AU - Lipatov, A S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P52A 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/1769967955?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Observation+of+high+density+plasma+in+the+vicinity+of+Europa+and+its+potential+relationship+with+plume+activity&rft.au=Paterson%2C+William+R%3BSittler%2C+E+C%2C+Jr%3BCooper%2C+J+F%3BHartle%2C+R+E%3BLipatov%2C+A+S%3BAnonymous&rft.aulast=Paterson&rft.aufirst=William&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 - Solar wind sputtering of small bodies; exospheres of Phobos and Deimos AN - 1769967948; 2016-017831 AB - Solar wind, magnetospheric ions and micrometeorites impact the surface of airless bodies in the solar system and deposit energy in the surface material. Excitation and momentum transfer processes lead to sputtering or desorption of molecules and atoms, thereby creating a dynamic exosphere about an otherwise airless body. Ion mass spectrometry of ejected materials provides a highly sensitive method for detecting sputter products and determining the surface composition [Johnson and Baragiola, 1991; Elphic et al., 1991]. Though most of the material is sputtered as neutral gas, UV photons can ionize ejected neutrals and a small fraction of the ejecta leaves the surface in an ionized state. However, ions are deflected by the variably-oriented solar wind magnetic field and thus relating their detection to a surface location can be problematic. Here we estimate the average ion density close to the surface of Phobos or Deimos to predict whether modern mass spectrometry instruments [Mahaffey et al. 2014] would be able to obtain sufficient compositional information to place constraints on their origin. The open source Monte Carlo program SRIM. SR was used to simulate the effect of ions incident onto a surface representing several different meteorite compositions and gave estimates of the damage and sputtering effects. As much of the empirical data supporting SRIM results comes from sputtering of metallic and organic molecular targets which can differ greatly from materials that make up planetary surfaces, measurements of cohesive energies and enthalpies of formation were used to estimate the surface binding energies for minerals, though these can vary significantly depending on the chemical composition. Since these properties affect the sputtering yield, comparisons of simulations with laboratory measurements were made to test the validity of our estimates. Using the validated results and a constant fraction to estimate ion yields, the density of ejected ions and neutrals vs. altitude from Phobos and Deimos was calculated using analytical equations. We use the results to make predictions on the expected signal for several meteorite classes. JF - American Geophysical Union Fall Meeting AU - Schaible, M J AU - Johnson, R E AU - Lee, P AU - Benna, M AU - Elphic, R C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21F EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769967948?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Solar+wind+sputtering+of+small+bodies%3B+exospheres+of+Phobos+and+Deimos&rft.au=Schaible%2C+M+J%3BJohnson%2C+R+E%3BLee%2C+P%3BBenna%2C+M%3BElphic%2C+R+C%3BAnonymous&rft.aulast=Schaible&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 - The D/H ratio of the Martian water that formed the Yellowknife Bay mudstone rocks measured by the MSL-SAM instrument AN - 1769967886; 2016-017872 AB - Martian atmospheric loss processes change the isotopic composition of H, C, O, N, and Ar. Escape process to space enrich heavier isotopes in the atmosphere over geological time. The SAM instrument on the Curiosity rover has measured these isotopes in H2O, CO2, N2, and Ar multiple times over the course of the mission. In addition to this present record, volatiles extracted from ancient rocks such as the clays sampled in Yellowknife Bay mudstones of Gale crater may be able to reveal the isotopic composition of light elements much earlier in martian history. Small samples of mudstone rocks acquired by the Curiosity drill were analyzed by SAM for their volatile content. The SAM Tunable Laser Spectrometer (TLS) measured the D/H ratio in water and the Quadrupole Mass Spectrometer (QMS) determined the D/H ratio in hydrogen released from these samples by stepwise heating. Clay materials on Earth are known to contain water in several forms. Molecular water bound loosely in pore spaces may be removed by drying under ambient conditions. Water also may be adsorbed on the surface of clay mineral surfaces or reside in interlayer positions or within structural channels in the clays. Finally, clay minerals contain hydroxyl units bound structurally in the minerals that at elevated temperatures (> approximately 450 degrees C) produce water and hydrogen of dehydroxylation; this high-temperature component is most likely to reflect the isotopic composition of water (and atmosphere) present at the time of clay formation. We have designed and implemented a stepped extraction protocol to more precisely measure the D/H ratio in both the low and high temperature water in Martian clays. The D/H in the high temperature water reflects the D/H of the water that formed these clay minerals. We will discuss the implications for water loss over the past 3+Ga and compare our findings with those of related Martian meteorite studies. This research was supported by the National Aeronautics and Space Administration. JF - American Geophysical Union Fall Meeting AU - Mahaffy, P R AU - Webster, C R AU - Brunner, A AU - McAdam, A AU - Flesch, G AU - Stern, J C AU - Eigenbrode, J L AU - Conrad, P G AU - Pavlov, A AU - Malespin, C AU - Atreya, S K AU - Blank, J G AU - Owen, T C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23E EP - 03 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/1769967886?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+D%2FH+ratio+of+the+Martian+water+that+formed+the+Yellowknife+Bay+mudstone+rocks+measured+by+the+MSL-SAM+instrument&rft.au=Stampoulis%2C+Dimitrios%3BAndreadis%2C+Konstantinos%3BGranger%2C+Stephanie%3BFisher%2C+Joshua%3BBehrangi%2C+Ali%3BDas%2C+Narendra%3BTurk%2C+Joseph&rft.aulast=Stampoulis&rft.aufirst=Dimitrios&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/ 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 - Earthbound unmanned autonomous vehicles (UAVS) as planetary science testbeds AN - 1769967851; 2016-017791 AB - Recent advances in the technology of unmanned vehicles have greatly expanded the range of contemplated terrestrial operational environments for their use, including aerial, surface, and submarine. The advances have been most pronounced in the areas of autonomy, miniaturization, durability, standardization, and ease of operation, most notably (especially in the popular press) for airborne vehicles. Of course, for a wide range of planetary venues, autonomy at high cost of both money and risk, has always been a requirement. Most recently, missions to Mars have also featured an unprecedented degree of mobility. Combining the traditional planetary surface deployment operational and science imperatives with emerging, very accessible, and relatively economical small UAV platforms on Earth can provide flexible, rugged, self-directed, test-bed platforms for landed instruments and strategies that will ultimately be directed elsewhere, and, in the process, provide valuable earth science data. While the most direct transfer of technology from terrestrial to planetary venues is perhaps for bodies with atmospheres (and oceans), with appropriate technology and strategy accommodations, single and networked UAVs can be designed to operate on even airless bodies, under a variety of gravities. In this presentation, we present and use results and lessons learned from our recent earth-bound UAV volcano deployments, as well as our future plans for such, to conceptualize a range of planetary and small-body missions. We gratefully acknowledge the assistance of students and colleagues at our home institutions, and the government of Costa Rica, without which our UAV deployments would not have been possible. This work was carried out, in part, at the Jet Propulsion Laboratory of the California Institute of Technology under contract to NASA. JF - American Geophysical Union Fall Meeting AU - Pieri, D C AU - Bland, Geoff AU - Diaz, Jorge Andres AU - Fladeland, Matthew M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11A EP - 3736 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/1769967851?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Earthbound+unmanned+autonomous+vehicles+%28UAVS%29+as+planetary+science+testbeds&rft.au=Pieri%2C+D+C%3BBland%2C+Geoff%3BDiaz%2C+Jorge+Andres%3BFladeland%2C+Matthew+M%3BAnonymous&rft.aulast=Pieri&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 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 - Overview of observations with the Rosetta/Miro instrument at comet Churyumov-Gerasimenko AN - 1769967848; 2016-017923 AB - The MIRO (Microwave Instrument on the Rosetta Orbiter) is a dual frequency (560 GHz and 190 GHz) heterodyne instrument consisting of two broadband channels (one in each frequency band) for continuum measurements, and a very high spectral resolution (44 kHz, 4096 channels) spectrometer interfaced with the submillimeter radiometer. The spectroscopic receiver is fixed tuned to measure simultaneously 8 molecular transitions of water, carbon monoxide, ammonia, and methanol. The continuum channels probe the nucleus sub-surface temperatures; the spectrometer channels are sensitive to gas abundance, velocity, and temperature. A broad scientific objective of the MIRO experiment is to understand details of the relationship between the nucleus and the coma of Comet Churyumov-Gerasimenko. This paper will present an overview of the MIRO instrument, status of observations, and early results. Early results include detection of water vapor in the coma and measurement of the water gas production rate. The authors acknowledge the Rosetta Project (a European Space Agency mission with the participation of the National Aeronautics and Space Administration). Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. JF - American Geophysical Union Fall Meeting AU - Gulkis, S AU - Allen, M 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/1769967848?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Overview+of+observations+with+the+Rosetta%2FMiro+instrument+at+comet+Churyumov-Gerasimenko&rft.au=Gulkis%2C+S%3BAllen%2C+M%3BAnonymous&rft.aulast=Gulkis&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Investigating the habitability and preservation potential of two aqueous settings in Gusev crater, Mars AN - 1769967836; 2016-017922 AB - The Spirit rover was sent to Gusev crater because of evidence that it contained an ancient lake. Lacustrine sediments were not identified, but aqueous activity was. Spirit encountered widespread meter-scale eroded outcrops and regolith composed of opaline silica in a setting associated with small-scale explosive volcanism. This combination was interpreted as evidence for a hydrothermal system, with silica produced by either fumarolic acid-sulfate leaching of host rocks or precipitation from silica-rich hot spring or geyser waters [1]. Evidence for the latter is stronger based on stratigraphic and textural arguments [2]. Our ongoing lab and field studies of terrestrial opaline silica occurrences demonstrate that fumarolic alteration leads to greater mineral diversity and less SiO2 enrichment than observed in the Gusev case, pointing to a hot spring or geyser origin. Terrestrial hot springs support microbial communities and can preserve that evidence over geologic timescales [3], making outcrops of opaline silica ideal targets in a search for biosignatures with instruments on the Mars 2020 rover. Spirit also discovered outcrops with 16-34 wt% Mg-Fe carbonate. Dubbed Comanche, the carbonate was thought to result from dissolution by hydrothermal fluids of pre-existing carbonates elsewhere in Gusev followed by transport and re-precipitation [4]. A reanalysis found evidence that the alteration is consistent with evaporative precipitation of low-temperature, near-surface solutions derived from limited water-rock interaction in rocks equivalent to nearby "Algonquin" outcrops [5]. Water-limited leaching of formerly widespread Algonquin-like tephra deposits by ephemeral waters, followed by transport and evaporative precipitation of the fluids into the Comanche outcrops, can explain their chemical, mineralogical, and textural characteristics. The habitability potential of this setting is unclear, but detrital materials carried by floodwaters and preserved in carbonate cements may be of astrobiological interest. [1] Squyres, S. W., et al. (2008), Science, 320, 1063-1067. [2] Ruff, S. W., et al. (2011), J. Geophys. Res., 116, E00F2. [3] Walter, M. R., et al. (1996), Palaios, 11, 497-518. [4] Morris, R. V., et al. (2010), Science, 329, 421-424. [5] Ruff, S. W., et al. (2014), Geology, 42, 4, 359-362. JF - American Geophysical Union Fall Meeting AU - Ruff, S W AU - Farmer, J D AU - Milliken, R AU - Niles, P B AU - Alfano, F AU - Clarke, A B AU - Kraft, M D AU - Hardgrove, C J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P32A 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/1769967836?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+the+habitability+and+preservation+potential+of+two+aqueous+settings+in+Gusev+crater%2C+Mars&rft.au=Ruff%2C+S+W%3BFarmer%2C+J+D%3BMilliken%2C+R%3BNiles%2C+P+B%3BAlfano%2C+F%3BClarke%2C+A+B%3BKraft%2C+M+D%3BHardgrove%2C+C+J%3BAnonymous&rft.aulast=Ruff&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Unstable Titan-generated Rayleigh-Taylor lakes impact ice AN - 1769967829; 2016-018029 AB - The evolution of surface morphology on Titan, Triton, and other worlds is strongly influenced by the interplay of various fluid dynamical processes. Specifically, overturning instabilities can easily arise due to the special circumstances of landform evolution that probably occurred on these worlds. On Titan, large impacts that formed basins like Menrva crater (and possibly Hotei Regio) would have generated impact-melt ice lakes unstably arranged over less dense ice. Cantaloupe terrains, for example as seen on Triton, may be the result of condensation of volatiles (methane, nitrogen) leading to unstably stratified layers of different compositions and densities. In each of these cases, Rayleigh-Taylor instabilities leading to large scale diapirism may be at play. In addition to the dynamics of these instabilities, other physical effects (e.g. heat diffusion, freezing/melting, porosity, temperature dependent viscosity) likely play an important role in the evolution of these features. In this ongoing study, we examine the properties of unstably stratified fluids in which the lower less-dense ice has a temperature dependent viscosity. Surprisingly, we find that there exists an optimal disturbance length scale corresponding to the fastest growth of the Rayleigh-Taylor instability. For unstably stratified layers of water (low viscosity heavy liquid lying above an ice whose viscosity increases with depth) the fastest growing mode corresponds to 40-60 km scales with overturn times of approximately 100 days. We present a detailed numerical stability analysis in a corresponding Boussinessq model (in the creeping flow limit) incorporating thermal conduction and latent heat release and we examine the stability properties surveying a variety of parameters. We have also developed a two-dimensional numerical code (a hybrid spectral/compact-differencing scheme) to model the evolution of such systems for which we shall present preliminary numerical results depicting the outcome of some controlled initial configurations. JF - American Geophysical Union Fall Meeting AU - Umurhan, Orkan AU - Korycansky, D G AU - Zahnle, K J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43C EP - 4002 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/1769967829?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Unstable+Titan-generated+Rayleigh-Taylor+lakes+impact+ice&rft.au=Umurhan%2C+Orkan%3BKorycansky%2C+D+G%3BZahnle%2C+K+J%3BAnonymous&rft.aulast=Umurhan&rft.aufirst=Orkan&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 - Comet 67p/Churyumov-Gerasimenko; first science results by Rosetta/Osiris AN - 1769967828; 2016-017925 AB - Abstract ESA's Rosetta mission arrived on August 6, 2014, at target Comet 67P/Churyumov-Gerasimenko after 10 years of cruise. OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) is the scientific imaging system onboard Rosetta. It comprises a Narrow Angle Camera (NAC) for nucleus surface and dust studies and a Wide Angle Camera (WAC) for the wide field coma investigations. We present the first science results achieved by OSIRIS from the arrival at the comet throughout the mapping phase. The overview will cover surface morphology and activity of the nucleus as seen in gas, dust, and local jets. Acknowledgements OSIRIS was built by a consortium led by the Max-Planck-Institut fuer Sonnensystemforschung, Goettingen, Germany, in collaboration with CISAS, University of Padua, Italy, the Laboratoire d'Astrophysique de Marseilles, France, the Instituto de Astrofisica de Andalucia, CSIC, Granada, Spain, the Scientific Support Office of the European Space Agency, Noordwijk, The Netherlands, the Instituto Nacional de Tecnica Aeroespacial, Madrid, Spain, the Universidad Politechnica de Madrid, Spain, the Department of Physics and Astronomy of Uppsala University, Sweden, and the Institut fuer Datentechnik und Kommunikationsnetze der Technischen Universitaet Braunschweig, Germany. The support of the national funding agencies of Germany (DLR), France (CNES), Italy (ASI), Spain (MEC), Sweden (SNSB), and the ESA Technical Directorate is gratefully acknowledged. We thank the Rosetta Science Ground Segment at ESAC, the Rosetta Mission Operations Centre at ESOC and the Rosetta Project at ESTEC for their outstanding work enabling the science return of the Rosetta Mission. JF - American Geophysical Union Fall Meeting AU - Sierks, H AU - Barbieri, Cesare AU - Lamy, P L AU - Rodrigo, R AU - Koschny, D AU - Rickman, H AU - Agarwal, J AU - A'Hearn, M F AU - Angrilli, F AU - Barucci, M A AU - Bertaux, Jean-Loup AU - Bertini, I AU - Besse, S AU - Bodewits, D AU - Capanna, Claire AU - Cremonese, Gabriele AU - Da Deppo, V AU - Davidsson, B AU - Debei, S AU - De Cecco, M AU - Ferri, F AU - Fornasier, Sonia AU - Fulle, M AU - Gaskell, R W AU - Groussin, Olivier AU - Guettler, C AU - Gutierrez, Pedro AU - Hviid, S F AU - Ip, W H AU - Jorda, Laurent AU - Keller, H U AU - Joerg, K AU - Kramm, R AU - Kuhrt, E AU - Kueppers, M AU - La Forgia, F AU - Lara, L AU - Lazzarin, M AU - Leyrat, C AU - Moreno, J F AU - Lowry, S AU - Magrin, S AU - Marchi, S AU - Marzari, Francesco AU - Michalik, H AU - Mottola, S AU - Account, T AU - Oklay, N AU - Pajola, Maurizio AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P32B EP - 02 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/1769967828?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Comet+67p%2FChuryumov-Gerasimenko%3B+first+science+results+by+Rosetta%2FOsiris&rft.au=Sierks%2C+H%3BBarbieri%2C+Cesare%3BLamy%2C+P+L%3BRodrigo%2C+R%3BKoschny%2C+D%3BRickman%2C+H%3BAgarwal%2C+J%3BA%27Hearn%2C+M+F%3BAngrilli%2C+F%3BBarucci%2C+M+A%3BBertaux%2C+Jean-Loup%3BBertini%2C+I%3BBesse%2C+S%3BBodewits%2C+D%3BCapanna%2C+Claire%3BCremonese%2C+Gabriele%3BDa+Deppo%2C+V%3BDavidsson%2C+B%3BDebei%2C+S%3BDe+Cecco%2C+M%3BFerri%2C+F%3BFornasier%2C+Sonia%3BFulle%2C+M%3BGaskell%2C+R+W%3BGroussin%2C+Olivier%3BGuettler%2C+C%3BGutierrez%2C+Pedro%3BHviid%2C+S+F%3BIp%2C+W+H%3BJorda%2C+Laurent%3BKeller%2C+H+U%3BJoerg%2C+K%3BKramm%2C+R%3BKuhrt%2C+E%3BKueppers%2C+M%3BLa+Forgia%2C+F%3BLara%2C+L%3BLazzarin%2C+M%3BLeyrat%2C+C%3BMoreno%2C+J+F%3BLowry%2C+S%3BMagrin%2C+S%3BMarchi%2C+S%3BMarzari%2C+Francesco%3BMichalik%2C+H%3BMottola%2C+S%3BAccount%2C+T%3BOklay%2C+N%3BPajola%2C+Maurizio%3BAnonymous&rft.aulast=Sierks&rft.aufirst=H&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Global mapping of CO (sub 2) on Enceladus AN - 1769967820; 2016-018088 AB - We present the first global map of CO2 on Enceladus. The purpose is to determine whether CO2 is associated to fractures and eruptions, and if it formed recently. Cassini observed tectonic features and plumes on Enceladus, which could be caused by a warm subsurface ocean containing dissolved gases. CO2 should be one of these gases (Postberg, F. et al., Nature, 2009), and some of it should be erupted and condensed onto the surface (Matson et al., Icarus, 2012). Validation of this hypothesis could be done by determining the amount, location and molecular state of the CO2. Free CO2 ice and complexed CO2 were reported on Enceladus (Brown et al., Science, 2006; Hansen, LPSC, 2010) from analysis of Cassini Visual and Infrared Mapping Spectrometer (VIMS) data, and on other Saturn icy satellites (Cruikshank et al., Icarus, 2010 ; Filacchione et al., Icarus, 2010). Complexed CO2 has also been found from Galileo Near-Infrared Mapping Spectrometer (NIMS) spectra on the icy Galilean satellites (McCord et al., Science, 1997 and JGR, 1998), apparently due to both interior outgassing and radiation processing. CO2 has an asymmetric stretching mode that creates an absorption band, the wavelength position of which is sensitive to the nature of molecular associations between CO2 and their neighbors. Free CO2 ice absorbs at 4.268 mu m for (Sandford and Allamandola, 1990) and CO2 complexed with other molecules absorbs at shorter wavelengths, around 4.25 mu m or shorter (Chaban et al., Icarus, 2007). In VIMS spectra of Enceladus, this stretching mode absorption band is near the instrument detection limit. We utilized all VIMS data sets available that had significant spatial resolution to increase the statistics of the observations for any given location and improve the signal to noise. CO2 has also a smaller absorption at 2.7 mu m, although it occurs in a range of wavelength that has higher signal-to-noise ratio by several magnitudes, because the surface of Enceladus (mostly H2O ice) has higher albedo. We used both absorptions in the range 4.25-4.268 mu m and at 2.7 mu m to identify CO2. Our results confirm free CO2 is concentrated on the southern polar region, which is consistent with release from the eruptions, and is compatible with CO2 present in the interior. We now focus on detecting variations of band position at 4.25-4.268 mu m, in order to map free and complexed CO2. JF - American Geophysical Union Fall Meeting AU - McCord, T B AU - Combe, J P AU - Matson, D AU - Johnson, T V AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P53A EP - 4000 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/1769967820?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Global+mapping+of+CO+%28sub+2%29+on+Enceladus&rft.au=McCord%2C+T+B%3BCombe%2C+J+P%3BMatson%2C+D%3BJohnson%2C+T+V%3BAnonymous&rft.aulast=McCord&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 - An evaluation of the hydrocarbon trap as a potential source of organic compounds detected by the SAM instrument on the Curiosity rover AN - 1769967800; 2016-017909 AB - The Sample Analysis at Mars (SAM) instrument suite aboard the Curiosity rover catalogued a suite of organic compounds using pyrolysis gas chromatography-mass spectrometry (Py-GC-MS) and evolved gas analyses (EGA) of aeolian and subsurface drill fines at Gale crater, Mars. The sources of these organic compounds are also being investigated through laboratory experiments in which Mars analogue mixtures are analyzed by Py-GC-MS and EGA under SAM-like conditions. In this study we examined the hydrocarbon trap, a component of the SAM Py-GC-MS system, as a potential source of some of the compounds detected on Mars. Analogue mixtures consisting of olivine sand and varying amounts of Cl-containing salts and magnetite were analyzed with Py-GC-MS operated under SAM-like conditions (i.e. trap materials and pyrolysis and GC temperature programs were the same as SAM analyses). Carbon dioxide, benzene and toluene were identified in all experiments and chlorobenzenes (CBs) and HCl were identified in the experiments with Cl salts. As the concentration of Cl salts increased the abundance of CBs, HCl and CO2 increased whereas the abundance of benzene and toluene remained stable. In order to confirm that these compounds originate from the trap we analyzed the samples while bypassing the trap. Benzene was detected, although at much lower concentrations, and toluene could not be definitively identified. Traces of CB were also detected when Cl salts were analyzed without the trap, again at lower concentrations. Additionally, traces of phthalic acid were detected in the Cl salt samples; this compound readily forms CBs in the presence of HCl (Miller et al., 2013). From this we can conclude that traces of benzene, toluene, and CBs can be degradation products originating from the hydrocarbon trap. Understanding how these compounds form and their relationship to the concentration of different mineral decomposition products helps us interpret the significance of all the organic compounds identified in SAM GC-MS data. JF - American Geophysical Union Fall Meeting AU - Summons, R E AU - Miller, K AU - Glavin, D P AU - Martin, M AU - Eigenbrode, J L AU - Szopa, C AU - Buch, Arnaud AU - Belmahdi, Imene AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P31D EP - 4016 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/1769967800?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+evaluation+of+the+hydrocarbon+trap+as+a+potential+source+of+organic+compounds+detected+by+the+SAM+instrument+on+the+Curiosity+rover&rft.au=Summons%2C+R+E%3BMiller%2C+K%3BGlavin%2C+D+P%3BMartin%2C+M%3BEigenbrode%2C+J+L%3BSzopa%2C+C%3BBuch%2C+Arnaud%3BBelmahdi%2C+Imene%3BAnonymous&rft.aulast=Summons&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geologic framework for Aeolis Palus bedrock, and its relationship to Mt. Sharp, Mars AN - 1769967798; 2016-017999 AB - For the past 30 months the Curiosity rover has encountered stratified bedrock along a drive route extending from Bradbury Landing a Yellowknife Bay a Kimberley a Pahrump, a distance of nearly equal 9 km. Curiosity still has nearly equal 2.5 km to make it to Murray Buttes, taken as the base of Mt. Sharp. All bedrock outcrops expose sedimentary rocks, including mud/silt/sandstones, and conglomerate, all of basaltic composition. These rocks all form part of a fluvio-lacustrine facies association, with small volumes of co-mingled eolian deposits. Most are simply interpreted as distal alluvial fan deposits. Paleocurrent data from the Shaler outcrop (Yellowknife Bay) suggests a dominant component of southwesterly flow, and scattered outcrops within the Kimberley region provide evidence for southward-prograding clinoforms. Thus, most of the volume of sedimentary rock observed during the drive from Yellowknife Bay to the Kimberley is consistent with derivation of sediments from erosion of the northern crater rim. However, some stratigraphic intervals may derive from other source areas simply due to the lack of paleocurrent information. A major compositional change is observed in the Yellowknife Bay formation where lower members (Sheepbed, Gillespie) are slightly more mafic than average martian crust, whereas the overlying Glenelg member are more depleted in MgO+FeO, and more enriched in K2O (and Na2O locally). This signature of elevated K2O has been observed commonly in outcrops extending all the way the Kimberley where the drilled Windjana sandstone revealed significant quantities of potassium feldspar. Conglomerates may differ from sandstones in containing a greater fraction of plagioclase feldspar. This suggests that much of the bedrock that underlies Aeolis Palus between Yellowknife Bay and the Kimberley is derived from alkaline source rocks, likely located along the northern rim. In contrast, the lower part of Yellowknife Bay, including the Sheepbed mudstone - with finer grain size - might record more distant provenance. Recent results reflecting the geology between the Kimberley and Murray Buttes will also be discussed. JF - American Geophysical Union Fall Meeting AU - Grotzinger, J P AU - Blake, David F AU - Crisp, Joy A AU - Edgett, K S AU - Gellert, R AU - Gupta, S AU - Lewis, K W AU - Mahaffy, Paul R AU - Malin, M C AU - Newsom, H E AU - Parker, Timothy J AU - Rice, Melissa AU - Rubin, D M AU - Siebach, K L AU - Stack, K AU - Sumner, D Y AU - Wiens, R C AU - Williams, R M E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P42C EP - 01 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/1769967798?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geologic+framework+for+Aeolis+Palus+bedrock%2C+and+its+relationship+to+Mt.+Sharp%2C+Mars&rft.au=Grotzinger%2C+J+P%3BBlake%2C+David+F%3BCrisp%2C+Joy+A%3BEdgett%2C+K+S%3BGellert%2C+R%3BGupta%2C+S%3BLewis%2C+K+W%3BMahaffy%2C+Paul+R%3BMalin%2C+M+C%3BNewsom%2C+H+E%3BParker%2C+Timothy+J%3BRice%2C+Melissa%3BRubin%2C+D+M%3BSiebach%2C+K+L%3BStack%2C+K%3BSumner%2C+D+Y%3BWiens%2C+R+C%3BWilliams%2C+R+M+E%3BAnonymous&rft.aulast=Grotzinger&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - SAM chlorine observations at Gale Crater AN - 1769967797; 2016-017875 AB - The Sample Analysis at Mars investigation has detected Cl-bearing phases of various oxidation states in its thermally evolved gas measurements of both a wind drift deposit of fines and three different rock samples delivered as sieved drill powders to the instrument suite. In addition to HCl (Leshin et al, 2013; Ming et al., 2013) and chlorinated hydrocarbon detections (Glavin et al., 2013; Freissinet et al., in review), oxygen releases consistent with the decomposition of perchlorate salts are also observed. We have also measured chlorine isotope ratios of the four different solid samples, which yielded variable and more negative delta 37Cl than typically observed in SNC meteorite analyses. We summarize our chlorine observations in the context of other gases observed in the SAM solid sample analyses, including water, sulfur- and nitrogen-bearing compounds, and REMS observations of Relative Humidity and Temperature, and compare with knowledge of Martian chlorine obtained from the SNC meteorites. Finally, we examine the implications of surface/atmosphere Cl interactions and isotopic ratios for the rise and decline of habitable surface environments on Mars. This research was supported by the National Aeronautics and Space Administration (NASA) Mars Science Laboratory mission. JF - American Geophysical Union Fall Meeting AU - Conrad, P G AU - Farley, K A AU - Vasconcelos, P M AU - Malespin, C AU - Franz, H AU - McAdam, A AU - Sutter, B AU - Stern, J C AU - Clark, B C AU - Atreya, S K AU - Mahaffy, P R AU - Martin-Torres, J AU - Zorzano, M P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23E EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769967797?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=SAM+chlorine+observations+at+Gale+Crater&rft.au=Conrad%2C+P+G%3BFarley%2C+K+A%3BVasconcelos%2C+P+M%3BMalespin%2C+C%3BFranz%2C+H%3BMcAdam%2C+A%3BSutter%2C+B%3BStern%2C+J+C%3BClark%2C+B+C%3BAtreya%2C+S+K%3BMahaffy%2C+P+R%3BMartin-Torres%2C+J%3BZorzano%2C+M+P%3BAnonymous&rft.aulast=Conrad&rft.aufirst=P&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 - Antarctic analogs for Enceladus AN - 1769967791; 2016-018062 AB - Enceladus is a new world for astrobiology. The Cassini discovery of the icy plume emanating from the South Polar region indicates an active world, where detection of water, organics, sodium, and nano-particle silica in the plume strongly suggests that the source is a subsurface salty ocean reservoir. Recent gravity data from Cassini confirms the presence of a regional sea extending north to 50 degrees S. An ocean habitat under a thick ice cover is perhaps a recurring theme in the Outer Solar System, but what makes Enceladus unique is that the plume jetting out into space is carrying samples of this ocean. Therefore, through the study of Enceladus' plumes we can gain new insights not only of a possible habitable world in the Solar Systems, but also about the formation and evolution of other icy-satellites. Cassini has been able to fly through this plume--effectively sampling the ocean. It is time to plan for future missions that do more detailed analyses, possibly return samples back to Earth and search for evidence of life. To help prepare for such missions, the need for Earth-based analog environments is essential for logistical, methodological (life detection) and theoretical development. We have undertaken studies of two terrestrial environments that are close analogs to Enceladus' ocean: Lake Vida and Lake Untersee--two ice-sealed Antarctic lakes that represent physical, chemical and possibly biological analogs for Enceladus. By studying the diverse biology and physical and chemical constraints to life in these two unique lakes we will begin to understand the potential habitability of Enceladus and other icy moons, including possible sources of nutrients and energy, which together with liquid water are the key ingredients for life. Analog research such as this will also enable us to develop and test new strategies to search for evidence of life on Enceladus. JF - American Geophysical Union Fall Meeting AU - Murray, A E AU - Andersen, D T AU - McKay, C P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51F EP - 03 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/1769967791?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Antarctic+analogs+for+Enceladus&rft.au=Murray%2C+A+E%3BAndersen%2C+D+T%3BMcKay%2C+C+P%3BAnonymous&rft.aulast=Murray&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 - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Compositional constraints on the best characterized rocky exoplanet, Kepler-36 b AN - 1769965334; 2016-017846 AB - Kepler-36 is an extreme planetary system, consisting of two transiting sub-Neptune-size planets that revolve around a sub-giant star with orbital periods of 13.84 and 16.24 days. Mutual gravitational interactions between the two planets perturb the planets' transit times, allowing the planets' masses to be measured. Despite the similarity of their masses and orbital radii, the planets show a stark contrast in their mean densities; the inner planet (Kepler-36 b) is more than eight times as dense as its outer companion planet (Kepler-36 c). We perform a photo-dynamical analysis of the Kepler-36 system based on more than three years of Kepler photometry. With N-body integrations of initial conditions sampled from the photo-dynamical fits, we further refine the properties of the system by ruling out solutions that show large scale instability within 5 Giga-days. Ultimately, we measure the planets' masses within 4.2% precision, and the planets' radii with 1.8% precision. Kepler-36 b is currently the rocky exoplanet with the most precisely measured mass and radius. Kepler-36 b's mass and radius are consistent with a earth-like composition, and an iron-enhanced Mercury-like composition is ruled out. JF - American Geophysical Union Fall Meeting AU - Rogers, L AU - Deck, K AU - Lissauer, J J AU - Carter, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23B EP - 3989 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/1769965334?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Compositional+constraints+on+the+best+characterized+rocky+exoplanet%2C+Kepler-36+b&rft.au=Rogers%2C+L%3BDeck%2C+K%3BLissauer%2C+J+J%3BCarter%2C+J%3BAnonymous&rft.aulast=Rogers&rft.aufirst=L&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - LADEE NMS observations of sporadic water and carbon dioxide signatures in the lunar exosphere AN - 1769964693; 2016-017829 AB - During its six months in orbit, the Lunar Atmosphere and Dust Environment Explorer (LADEE) has detected signatures of water and carbon dioxide in the exosphere of the Moon. The signature of these two volatile gases has been measured by the Neutral Mass Spectrometer (NMS) as sporadic short-lived signal increases above instrument background. Following the detection of these two species in the exosphere, a systematic measurement campaign with a cadence of few hours over four main lunar local time sectors (sunrise, midnight, sunset, and noon) was put in place and continued to the end of the mission. While this measurement campaign did not reveal any local time dependence for these sporadic signal events, it showed that they are globally correlated with predicted micrometeoroid streams. Moreover, a subset of these NMS observations were acquired at low altitudes when water and carbon dioxide signals were below instrumental background, and used to establish new upper limits of the background abundances of these two gases in the exosphere. JF - American Geophysical Union Fall Meeting AU - Benna, Mehdi AU - Mahaffy, P R AU - Hurley, D AU - Stubbs, T J AU - Hodges, R R, Jr AU - Elphic, R C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21F EP - 02 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/1769964693?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=LADEE+NMS+observations+of+sporadic+water+and+carbon+dioxide+signatures+in+the+lunar+exosphere&rft.au=Benna%2C+Mehdi%3BMahaffy%2C+P+R%3BHurley%2C+D%3BStubbs%2C+T+J%3BHodges%2C+R+R%2C+Jr%3BElphic%2C+R+C%3BAnonymous&rft.aulast=Benna&rft.aufirst=Mehdi&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 - Radiolytic gas-driven cryovolcanism at Europa AN - 1769963821; 2016-018080 AB - A large apparent plume of water vapor was detected at the south pole of Europa in December 2012 by the Hubble Space Telescope [Roth et al., 2014] when Europa was near maximum radial distance (apojove) in its orbit around Jupiter. The absence thus far of further detections both at apojove and elsewhere may indicate an episodic source. There was reportedly no evident brightening locally or globally of the Europa oxygen neutral atmosphere coincident with the plume water vapor detection. This could be consistent with an O2-driven cryovolcanism model in which bubbles of trapped gases in the ice crust are released from clathrates on thermal contact with rising oceanic water and expand to force upward fluid flows to the surface. It has long been suggested [Chyba, 2000; Cooper et al., 2001] that the Europa ocean could be oxygenated by radiolytic oxygen from surface irradiation, also implying that the overlying ice crust could be saturated in oxygen clathrates [Hand et al., 2006]. That the moon ocean could be a potentially habitable environment by oxygenation or other processes has been a major motivation for missions to Europa. The radiolytic gas source would be far greater at Europa as compared to much lesser source rates for a similar model at Enceladus [Cooper et al., 2009]. Detected plume emissions could arise from both the directly ejected vapor and from sputtering and/or sublimation of chemically-active plume frost in the polar cap region. Europa's surface gravity is much higher than that of Enceladus, so most of the plume vapor would return to the surface as frost. If sputtering or radiolysis were active contributors to polar cap emissions from the frost, then emissions could also maximize at 6.5-hour intervals as Europa passes through the densest part of the Jovian magnetospheric plasma sheet as well as at 85-hour apojove intervals of the orbital period. For comparison to available polar cap plume and global atmospheric observations we present ballistic simulations of the resultant neutral gas density distributions for different source models. Chyba, C., Nature, 403, 381, 2000. Cooper, J. F., et al., Icarus, 149, 133-159, 2001. Cooper, J. F., et al., Plan. Sp. Sci., 57, 1607-1620, 2009. Hand, K. P., et al., Astrobiology, 6, 463-482, 2006. Roth, L., et al., Science, 343, 171-174, 2014. JF - American Geophysical Union Fall Meeting AU - Killen, Rosemary M AU - Cooper, J F AU - Sarantos, M AU - Sittler, E C, Jr AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P52A 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/1769963821?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Radiolytic+gas-driven+cryovolcanism+at+Europa&rft.au=Killen%2C+Rosemary+M%3BCooper%2C+J+F%3BSarantos%2C+M%3BSittler%2C+E+C%2C+Jr%3BAnonymous&rft.aulast=Killen&rft.aufirst=Rosemary&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 - The giant planet satellite exospheres AN - 1769963816; 2016-017832 AB - Exospheres are relatively common in the outer solar system among the moons of the gas giant planets. They span the range from very tenuous, surface-bounded exospheres (e.g., Rhea, Dione) to quite robust exospheres with exobase above the surface (e.g., Io, Triton), and include many intermediate cases (e.g., Europa, Ganymede, Enceladus). The exospheres of these moons exhibit an interesting variety of sources, from surface sputtering, to frost sublimation, to active plumes, and also well illustrate another common characteristic of the outer planet satellite exospheres, namely, that the primary species often exists both as a gas in atmosphere, and a condensate (frost or ice) on the surface. As described by Yelle et al. (1995) for Triton, "The interchange of matter between gas and solid phases on these bodies has profound effects on the physical state of the surface and the structure of the atmosphere." A brief overview of the exospheres of the outer planet satellites will be presented, including an inter-comparison of these satellites exospheres with each other, and with the exospheres of the Moon and Mercury. JF - American Geophysical Union Fall Meeting AU - McGrath, M A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21F 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/1769963816?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+giant+planet+satellite+exospheres&rft.au=McGrath%2C+M+A%3BAnonymous&rft.aulast=McGrath&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 - Thirteen iron meteorites found at Gale Crater, Meridiani Planum, and Gusev crater; exogenic witnesses to weathering processes near the Martian equator AN - 1769963811; 2016-018056 AB - At least 20 meteorites and meteorite candidates have now been found by science teams at three Mars rover landing sites, all within 15 degrees of the martian equator. Thirteen of these are iron meteorites, comprising 65% of the population--in order of magnitude greater abundance than found among witnessed iron falls in Earth-based collections ( approximately 6%). Chondritic meteorites, which comprise some 86% of Earth-based falls, are conspicuously absent from the Mars inventory. The reasons for this disproportion may involve a) post-fall environmental resistance differences favoring iron survivability; b) fragmentation from impact shock (and possibly internal weathering stresses associated with oxide production in desert environments [1]); combined with c) selection biases arising from residual chondritic fragments appearing less conspicuous. Impact features along rover traverses often show evidence of dark materials likely to be impactor fragments [e.g., 2], which could represent the missing chondritic fraction. The reactivity of reduced (metallic) iron to aqueous alteration, combined with the near equatorial and widely distributed locations of these rocks, makes them particularly useful to the assessment of climate models arguing for geologically recent ice at the martian equator. Exposure histories involving alternating wind/water cycles are imprinted on several Meridiani irons, for example [3]. Evidence for oxide coating removal demonstrates the current epoch to be one of coating destruction, not production, showing that atmospheric exposure alone is insufficient to produce the coating. Cavernous weathering is likely associated with acidic corrosion, while evidence of aeolian scouring is found in Widmanstaetten patterns, sharp-crested scallops, regmaglypt enlargement, and abundant pitting. Further study of these features could help constrain wind direction and velocity during epochs of sculpting [e.g., 4], and assist in exposure age estimation. References: [1] Ashley, J. W. and M. A. Velbel (2000), MAPS, V. 35 No. 5 Supplement, p. A22. [2] Golombek et al., (2010) J. Geophys. Res., 115, E00F08, DOI:10.1029/2010JE003628. [3] Ashley, J. W. et al., (2011) J. Geophys. Res., 116, E00F20, DOI:10.1029/2010JE003672. [4] Greeley, R. et al., (2002) J. Geophys. Res., 107, E1, 5005, DOI:10.1029/2000JE001481. JF - American Geophysical Union Fall Meeting AU - Ashley, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51E EP - 3990 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/1769963811?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Thirteen+iron+meteorites+found+at+Gale+Crater%2C+Meridiani+Planum%2C+and+Gusev+crater%3B+exogenic+witnesses+to+weathering+processes+near+the+Martian+equator&rft.au=Ashley%2C+J%3BAnonymous&rft.aulast=Ashley&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Radiation chemistry of potential Europa plumes AN - 1769963797; 2016-018100 AB - Recent detection of atomic hydrogen and atomic oxygen and their correlation to potential water plumes on Europa [Roth, Saur et al. 2014] invoked significant interest in further understanding of these potential/putative plumes on Europa. Unlike on Enceladus, Europa receives significant amount of electron and particle radiation. If the plumes come from trailing hemisphere and in the high radiation flux regions, then it is expected that the plume molecules be subjected to radiation processing. Our interest is to understand to what extent such radiation alterations occur and how they can be correlated to the plume original composition, whether organic or inorganic in nature. We will present laboratory studies [Henderson and Gudipati 2014] involving pulsed infrared laser ablation of ice that generates plumes similar to those observed on Enceladus [Hansen, Esposito et al. 2006; Hansen, Shemansky et al. 2011] and expected to be similar on Europa as a starting point; demonstrating the applicability of laser ablation to simulate plumes of Europa and Enceladus. We will present results from electron irradiation of these plumes to determine how organic and inorganic composition is altered due to radiation. Acknowledgments: This research was enabled through partial funding from NASA funding through Planetary Atmospheres, and the Europa Clipper Pre-Project. B.L.H. acknowledges funding from the NASA Postdoctoral Program for an NPP fellowship. Hansen, C. J., L. Esposito, et al. (2006). Enceladus' water vapor plume. Science 311(5766): 1422-1425. Hansen, C. J., D. E. Shemansky, et al. (2011). The composition and structure of the Enceladus plume. Geophysical Research Letters 38. Henderson, B. L. and M. S. Gudipati (2014). Plume composition and evolution in multicomponent ices using resonant two-step laser ablation and ionization mass spectrometry. The Journal of Physical Chemistry A 118(29): 5454-5463. Roth, L., J. Saur, et al. (2014). Transient water vapor at Europa's south pole. Science 343(6167): 171-174. JF - American Geophysical Union Fall Meeting AU - Gudipati, M S AU - Henderson, B L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P53B EP - 4015 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/1769963797?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Radiation+chemistry+of+potential+Europa+plumes&rft.au=Gudipati%2C+M+S%3BHenderson%2C+B+L%3BAnonymous&rft.aulast=Gudipati&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 - Joint analysis of bulk water/chlorine distribution in the Martian subsurface along MSL curiosity traverse from comparison between DAN/MSL and other instruments observations onboard Curiosity rover AN - 1769963775; 2016-018032 AB - Data gathered with the Dynamic Albedo of Neutrons (DAN) instrument onboard Curiosity rover during active neutron spectroscopy observations presents variations of induced subsurface neutron flux due to regional variability of bulk water distribution and elemental composition in martian soil. The duration, shape and amplitude of post pulse neutron emission measured by DAN primarily depend on the subsurface structure and distribution of hydrogen (the most efficient moderation element) but abundance of other elements is also important. In particular, the presence of elements with high thermal neutron absorption cross sections can depress the population of thermal neutrons that leak out of the surface. Several elements such as for example Cl, Fe, Ti, Mn, Gd have large cross-section for thermal neutron absorption. In our analysis we have derived water depth distribution and have also estimated a bulk content of chlorine. It is considered as "chlorine-equivalent" parameter for accounting of all absorbers of thermal neutrons. We have compared our estimations with other instrument observations performed onboard Curiosity in order to test observed variability on different horizontal and vertical scales. First of all, we have tried to correlate our estimations of chlorine-equivalent abundance with elemental composition provided by APXS at several contact science locations along Curiosity path where such a comparison was supported by observable geological context. DAN instrument has a large footprint area with a radius of about 1.5 m under the aft end of the rover. It is significantly larger than the footprint of contact and remote measurements of elemental composition provided by the other science instruments onboard Curiosity. But DAN provides a unique capability to look below the surface as deep as 60 cm and study the depth distribution of water and neutron-absorbing elements. DAN measurements are complementary to other Curiosity observations and could combined with them to provide joint study of subsurface water and chlorine distribution and test compositional heterogeneity in the subsurface. JF - American Geophysical Union Fall Meeting AU - Litvak, M L AU - Mitrofanov, I G AU - Sanin, A B AU - Lisov, D AU - Hardgrove, C J AU - Boynton, W V AU - Jun, I AU - Kuzmin, R AU - Martin-Torres, J AU - Mischna, M A AU - Moersch, J AU - Nikiforov, S AU - Starr, R D AU - Tate, C G AU - Zorzano, M P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51C EP - 3958 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/1769963775?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+analysis+of+bulk+water%2Fchlorine+distribution+in+the+Martian+subsurface+along+MSL+curiosity+traverse+from+comparison+between+DAN%2FMSL+and+other+instruments+observations+onboard+Curiosity+rover&rft.au=Litvak%2C+M+L%3BMitrofanov%2C+I+G%3BSanin%2C+A+B%3BLisov%2C+D%3BHardgrove%2C+C+J%3BBoynton%2C+W+V%3BJun%2C+I%3BKuzmin%2C+R%3BMartin-Torres%2C+J%3BMischna%2C+M+A%3BMoersch%2C+J%3BNikiforov%2C+S%3BStarr%2C+R+D%3BTate%2C+C+G%3BZorzano%2C+M+P%3BAnonymous&rft.aulast=Litvak&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+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 - Planetary doppler imaging AN - 1769963763; 2016-017837 AB - Determining the internal structure of the solar system's gas and ice giant planets is key to understanding their formation and evolution (Hubbard et al., 1999, 2002, Guillot 2005), and in turn the formation and evolution of the solar system. While internal structure can be constrained theoretically, measurements of internal density distributions are needed to uncover the details of the deep interior where significant ambiguities exist. To date the interiors of giant planets have been probed by measuring gravitational moments using spacecraft passing close to, or in orbit around the planet. Gravity measurements are effective in determining structure in the outer envelope of a planet, and also probing dynamics (e.g. the Cassini and Juno missions), but are less effective in probing deep structure or the presence of discrete boundaries. A promising technique for overcoming this limitation is planetary seismology (analogous to helioseismology in the solar case), postulated by Vorontsov, 1976. Using trapped pressure waves to probe giant planet interiors allows insight into the density and temperature distribution (via the sound speed) down to the planetary core, and is also sensitive to sharp boundaries, for example at the molecular to metallic hydrogen transition or at the core-envelope interface. Detecting such boundaries is not only important in understanding the overall structure of the planet, but also has implications for our understanding of the basic properties of matter at extreme pressures. Recent Doppler measurements of Jupiter by Gaulme et al. (2011) claimed a promising detection of trapped oscillations, while Hedman and Nicholson (2013) have shown that trapped waves in Saturn cause detectable perturbations in Saturn's C ring. Both these papers have fueled interest in using seismology as a tool for studying the solar system's giant planets. To fully exploit planetary seismology as a tool for understanding giant planet structure, measurements need to be made from space, however, much can be learned about Jupiter and Saturn using ground-based measurements. We will present the first results from a ground-based observing campaign of Jupiter and Saturn, made from the Bok 90" telescope on Kitt Peak, intended to validate the work of Gaulme et al., and extend such observations to Saturn. JF - American Geophysical Union Fall Meeting AU - Murphy, N AU - Jefferies, S AU - Hart, M AU - Hubbard, W B AU - Showman, A P AU - Hernandez, G AU - Rudd, L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23A EP - 3970 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/1769963763?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Planetary+doppler+imaging&rft.au=Murphy%2C+N%3BJefferies%2C+S%3BHart%2C+M%3BHubbard%2C+W+B%3BShowman%2C+A+P%3BHernandez%2C+G%3BRudd%2C+L%3BAnonymous&rft.aulast=Murphy&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 - Simulations of impact features on comet 67P/Churyumov-Gerasimenko, as imaged by OSIRIS/ROSETTA AN - 1769963751; 2016-017967 AB - The images obtained by OSIRIS on board the ESA Rosetta mission during the approaching phase and during the orbit around the nucleus of the comet 67P/Churyumov-Gerasimenko allowed to map the cometary surface with the very high resolution of the Narrow Angle Camera (NAC). Further important products have been realized with the nucleus images as the shape model and the Digital Terrain Model allowing to derive the profile of some features possibly identified as impact craters. Impact craters have been simulated with the iSALE hydrocode, one of the multi-rheology and multi-material extension of the SALE hydrocode (Amsden et al., 1980, Collins et al., 2004; Wuennemann et al., 2006), specifically developed to model impact crater formation. The structure and composition of the projectile was simplified to spherical and homogeneous dunite impacting at an angle of 90 degrees , while we have assumed different target composition from dunite to water ice changing the porosity and the strength. A further important parameter to take into account is the temperature of the region where the crater is formed and we will adopt an updated thermal model of the nucleus in order to better define it. We will show the preliminary results of the impact simulations performed in 2D, including some insights on the nucleus structure. Acknowledgements: We gratefully acknowledge the developers of iSALE-2D, including Gareth Collins, Kai Wuennemann, Dirk Elbeshausen, Boris Ivanov and Jay Melosh (see www.iSALE-code.de). JF - American Geophysical Union Fall Meeting AU - Cremonese, Gabriele AU - Lucchetti, Alice AU - Marchi, S AU - Martellato, Elena AU - Massironi, Matteo AU - Oklay, N AU - Sierks, H AU - Vincent, J B AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P41C EP - 3944 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/1769963751?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Simulations+of+impact+features+on+comet+67P%2FChuryumov-Gerasimenko%2C+as+imaged+by+OSIRIS%2FROSETTA&rft.au=Cremonese%2C+Gabriele%3BLucchetti%2C+Alice%3BMarchi%2C+S%3BMartellato%2C+Elena%3BMassironi%2C+Matteo%3BOklay%2C+N%3BSierks%2C+H%3BVincent%2C+J+B%3BAnonymous&rft.aulast=Cremonese&rft.aufirst=Gabriele&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 - Gullies and lobate deposits as geomorphological evidence for impact-induced transient water flow and localized, buried ice-bearing deposits on Vesta AN - 1769963739; 2016-018042 AB - Vesta, the second most massive asteroid, has long been perceived as anhydrous. However, recent studies suggesting the localized presence of hydrated minerals and past sub-surface water have challenged this perception (e.g. Sarafian et al., 2013; De Sanctis et al., 2012; Prettyman et al., 2012; McCord et al. 2012; Reddy et al. 2012; Treiman et al, 2004). Herein we show evidence that transient water flowed on the surface, in a debris-flow-like process, and left distinctive geomorphologic features. Based on analysis of approximately 20 m/pixel images obtained by Dawn, we identify a class of locally occurring, interconnected and curvilinear systems of gullies in the walls of young (< 100s Ma) impact craters, ending in lobate deposits near the crater floors. As curvilinear systems only occur within impact craters, we propose that they formed by a particulate-dominated transient flow of water (< or = 26 minutes) that was released from buried ice-bearing deposits by impact-induced heating. Our interpretation is in accordance with the occurrence of pitted terrain on lobate deposits and crater floors. Pitted terrain is interpreted to result from the degassing of volatiles (Denevi et al., 2012). We also identify linear gully systems, which are morphologically distinct from the curvilinear systems, and are interpreted to form by dry flow of material. Craters containing curvilinear systems are clustered in two regions of Vesta's surface, whereas linear systems are evenly distributed. This indicates that the proposed buried ice-bearing deposits are likely localized in extent. Together with the newly expanded understanding of the distribution and behavior of water in the asteroid belt (e.g. Kueppers et al., 2014; Hsieh & Jewitt, 2006), our results support the new paradigm that there is a continuum of small bodies in the solar system with many intermediate states of hydration. The varied hydrologic processes that occur within this new paradigm suggest the evolution of our solar system is more complex than previously thought. JF - American Geophysical Union Fall Meeting AU - Scully, J E C AU - Russell, C T AU - Yin, A AU - Jaumann, R AU - Carey, E M AU - McSween, H Y, Jr AU - Castillo, Julie C AU - Raymond, C A AU - Reddy, V AU - Le Corre, L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51D EP - 3970 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/1769963739?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Gullies+and+lobate+deposits+as+geomorphological+evidence+for+impact-induced+transient+water+flow+and+localized%2C+buried+ice-bearing+deposits+on+Vesta&rft.au=Scully%2C+J+E+C%3BRussell%2C+C+T%3BYin%2C+A%3BJaumann%2C+R%3BCarey%2C+E+M%3BMcSween%2C+H+Y%2C+Jr%3BCastillo%2C+Julie+C%3BRaymond%2C+C+A%3BReddy%2C+V%3BLe+Corre%2C+L%3BAnonymous&rft.aulast=Scully&rft.aufirst=J+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 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 - The lunar exosphere as seen from LADEE UVS AN - 1769963709; 2016-017830 AB - The Lunar Atmosphere and Dust Environment Explorer (LADEE) Ultraviolet Visible Spectrometer (UVS) began commissioning activities in orbit around the moon on October 16, 2013. Science observations began October 23, 2013 and continued until minutes prior to the planned disposal of the LADEE spacecraft on April 18, 2014 (UTC). Over the course of the mission the UVS instrument made a series of systematic observations, including lunar limb stares at both terminators and about local noon, targeted activities, including anti-sun sodium tail observations, north/south limb stares, solar extinction measurements, and instrument calibrations. Initial analysis of these observations have resulted in temporal and spatial mapping of key exosphere species, such as sodium and potassium, and the detection of several previously-undetected species. Sodium and potassium show variations in concentration across both a single lunation and longer semi-annual periods. These changes are likely due to a response to micro-meteoroidal and solar wind fluxes as well as spatial variations in surface composition. Tentative detections of Ti, Si, Mg, O, Al and He+ have been made. Observations in search of dust, including limb and occultation activities, have provided high signal-to-noise spectra that show variations in extinction and light scattering possibly due to exospheric dust. This talk will provide an overview of UVS results, with an emphasis on the sodium and potassium observations. JF - American Geophysical Union Fall Meeting AU - Colaprete, A AU - Wooden, D H AU - Cook, A AU - Elphic, R C AU - Sarantos, M AU - Vargo, K AU - Hermalyn, B AU - Stubbs, T J AU - Karcz, J AU - Shirley, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21F EP - 04 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/1769963709?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+lunar+exosphere+as+seen+from+LADEE+UVS&rft.au=Colaprete%2C+A%3BWooden%2C+D+H%3BCook%2C+A%3BElphic%2C+R+C%3BSarantos%2C+M%3BVargo%2C+K%3BHermalyn%2C+B%3BStubbs%2C+T+J%3BKarcz%2C+J%3BShirley%2C+M%3BAnonymous&rft.aulast=Colaprete&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 - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Capturing evidence for past life in the Martian loess AN - 1769963707; 2016-017879 AB - Vast loess deposits in Europe and the US accumulated after the last glacial maxima (<20 kyrs). In Argentina, however, they gradually accumulated from dried riverbeds that carried sediments from the Andes over the last 12 myrs [1]. These 300m-thick loessoid deposits resemble the accumulations of unconformable deposits found on Mars, some exceeding 3km in thickness. While short-lived as surface materials on the Earth (e.g., <12 myrs in Argentina), they remain exposed for billions of years on Mars (since the late Noachian). Unlithified loessoid deposits represent a special target type affecting both crater excavation and melt generation. Craters as large as 20km in diameter may not reach the underlying "basement" (e.g., cratered highlands). Porous targets also result in greater amounts of impact melt derived from different levels [2, 3]. Moreover, melt breccias can be soft captured, buried, and trapped until re-exposed [4]. In Argentina, some folded vesicular glasses as old as 9.3 myrs contain flash-heated yet well-preserved biomatter (down to < 5 microns) including plant materials [5] and even partially vitrified cartilage fragments [6]. The entrained plant materials also contain organic relicts such as derivatives of chlorophyll. This biomatter becomes trapped as the melt is rolled and folded during excavation or emplacement. Exploratory impact experiments at the NASA Ames Vertical Gun Range simulated this process at a much smaller scale (5km/s at 45 deg impact angle). Fragments of wetted Pampas grass and tardigrades buried near the surface were entrained within small, twisted and folded glasses. Grass positioned uprange of the impact, however, survived intact within a projectile radius of the impact point. Consequently, the low impact speeds available in the experiments could be more than offset by an uprange location for a much higher speed impact. While plant material should not be expected, other primitive forms could be mixed within seams and folds within proximal impact melts. [1] Zarate, M. A. (2003), Quat. Sci. Revs. 22, p. 1987-2006; [2] Schultz, P. H. et al. (2004), EPSL, v. 219, 221-238; [3] Schultz, P. H. et al. (2006), MAPS, v. 41, 749-771; [4] Schultz and Mustard (2004), JGR 109, DOI: 10.1029/2002JE002025; [5] Schultz et al. (2014), Geology, 42, 515-518; [6] Harris and Schultz (2007), LPSC 38, #2306. JF - American Geophysical Union Fall Meeting AU - Schultz, P H AU - Harris, R S AU - Clemett, S J AU - Thomas-Keprta, K L AU - Zarate, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P24A EP - 03 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/1769963707?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Capturing+evidence+for+past+life+in+the+Martian+loess&rft.au=Schultz%2C+P+H%3BHarris%2C+R+S%3BClemett%2C+S+J%3BThomas-Keprta%2C+K+L%3BZarate%2C+M%3BAnonymous&rft.aulast=Schultz&rft.aufirst=P&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 - The generation of surface-bound exospheres via electron-stimulated desorption (and related phenomena); results from Apollo samples and Hermian regolith simulants AN - 1769963697; 2016-017852 AB - The generation of surface-bound exospheres present around the Moon, Mercury and other airless rocky bodies are produced primarily by the interaction of micrometeoroid impacts and charged particles from the solar wind, and magnetospheres with those surfaces. While the study of the interactions of both micrometeoroids and ion sputtering are well investigated, the contributions arising from energetic electron interactions are typically less-well established. Observations from the Fast Imaging Plasma Spectrometer (FIPS), taken < 400 km from the surface, have shown a plasma cusp with energetic heavy ions (i.e. Na+- and O+-groups) for which the source has not been determined. However, the precipitation of keV electrons onto the surfaces of Mercury has recently been inferred from measurements using the X-Ray Spectrometer (XRS) instrument onboard the MESSENGER spacecraft observations of the night-side of Mercury. A newly developed global kinetic transport model suggests that electron-stimulated desorption (ESD), and possibly light ion stimulated desorption (ISD), can directly yield ions that can be transported and dynamically accelerated to the plasma cusp regions observed by FIPS. In addition, keV electrons and ions from the solar wind and Earth's magnetosphere frequently bombard with the lunar surface. Here, we present some of the most recent results from our ongoing work studying the effects of photon-stimulated desorption (PSD), ion-stimulated desorption (ISD) and implantation, as well as electron-stimulated desorption (ESD). Apollo samples collected from both the lunar highland and Mare regions, as well as simulants of the Mercury Regolith have been investigated. The temperature--(100-600 K) and energy-dependence (threshold--2 keV) of ESD time-of-flight (ToF) results will be presented for these materials along with some preliminary results from our group based on photon-desorption studies of water on lunar material, temperature-programmed desorption (TPD) studies of water covered regolith and dusts, as well as the effects of ion implantation/sputtering using keV H+ ions on ESD-ToF results. The implications of these results in the context of current observations will be discussed. JF - American Geophysical Union Fall Meeting AU - Bennett, C AU - Poston, M AU - McLain, J L AU - Orlando, T M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23C EP - 3997 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/1769963697?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+generation+of+surface-bound+exospheres+via+electron-stimulated+desorption+%28and+related+phenomena%29%3B+results+from+Apollo+samples+and+Hermian+regolith+simulants&rft.au=Bennett%2C+C%3BPoston%2C+M%3BMcLain%2C+J+L%3BOrlando%2C+T+M%3BAnonymous&rft.aulast=Bennett&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Fresh shallow valleys (FSVs) in northern Arabia terra, Mars AN - 1769963692; 2016-017938 AB - Fresh Shallow Valleys (FSVs) on Mars are part of a growing inventory of post-Noachian landforms that may be related to late, widespread aqueous activity that occurred during a period once thought to be less favorable for precipitation and runoff. Constraining the source, magnitude, timing and duration of FSVs will provide insight into the mechanism and extent of fluvial activity on Mars and the geologic and climatic environments in which they formed. Unlike the older Noachian-Hesperian valleys that are characterized by integrated, dissected and degraded networks that cover large spatial extents, FSVs are typically narrow, short or discontinuous valleys with low drainage densities. They are generally incised no more than a few decameters, slightly degraded at multi-meter scales, and cluster in the mid-latitudes (35-50 degrees in both hemispheres). A high concentration of FSVs occurs in northern Arabia Terra ( approximately 33 degrees N, 8 degrees E), a Noachian-aged landscape characterized by broad, irregular depressions. Many of the FSVs in this region are 150+ km long and some appear to cross depressions that were likely filled with ice or water at the time of formation. Examples of broad, flat floored FSVs with incised channels could either indicate a complex history of a single flow event or multiple flow events. The occurrence of "pollywogs," fairly fresh, small (typically 2-10 km in diameter) craters with a single channel extending from the rim outward, implies overflow of the crater, the presence of a deep lake and the involvement of artesian groundwater flow. Roughly 25% of the FSVs in our northern Arabia Terra study region occur on relatively fresh crater ejecta, which may be related to formation age, topography, surface materials and (or) substrate. Ejecta with dense concentrations of FSVs average 25.5 km in diameter, have more degraded crater interiors, and well developed petal-like ejecta. Ejecta with sparse or no FSVs have radial ejecta with less distinct petals and are associated with smaller craters (16 km and 8 km in diameter, respectively) that have less degraded crater interiors. Crater statistics suggest ejecta with high concentrations of FSVs are relatively older than ejecta with sparse or no FSVs. The crater statistics also suggest the valleys formed in the mid-Hesperian to early Amazonian, coeval with the formation of large alluvial fans. JF - American Geophysical Union Fall Meeting AU - Wilson, S A AU - Howard, A D AU - Moore, J M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P33A EP - 4026 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/1769963692?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Fresh+shallow+valleys+%28FSVs%29+in+northern+Arabia+terra%2C+Mars&rft.au=Wilson%2C+S+A%3BHoward%2C+A+D%3BMoore%2C+J+M%3BAnonymous&rft.aulast=Wilson&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Goldstone radar evidence for short-axis mode non-principal axis rotation of near-Earth asteroid (214869) 2007 PA8 AN - 1769963679; 2016-017887 AB - We report Goldstone radar (8560 MHz, 3.5 cm) observations and shape and spin state modeling of near-Earth asteroid (214869) 2007 PA8. We observed 2007 PA8 on 16 days between Oct 16-Nov 13, 2012 when the asteroid was within 0.14 AU of Earth. Closest approach was on Nov 5 at a distance of 0.043 AU (17 lunar distances). Images obtained with Goldstone's new chirp system achieved range resolution as fine as 3.75 m, placing thousands of pixels on the asteroid's surface and revealing that 2007 PA8 is an elongated, asymmetric object. Surface features include angularities, multiple facets, and a concavity approximately several hundred meters in diameter. We used the Shape software [1, 2] to estimate the asteroid's 3D shape and spin state. The initial shape of the asteroid was parameterized as an ovoid with dimensions of 1.85 kmx1.25 kmx1.20 km in principal axis (PA) rotation with rotational rates of 80-100 deg/day to match the progression of features visible in the images. This yielded two candidate spin states: one near the south ecliptic pole and another near ecliptic longitude and latitude of (270, +17) deg. However, PA spin state models predict that images from Oct 31 and Nov 11 should be very similar, but the images on those two days appear dramatically different. As a result, we expanded the spin state search to include non-principal axis (NPA) rotation. The best fit was obtained with NPA rotation in short-axis mode with an average period of precession by the long axis around the angular momentum vector of 4.25 days and an oscillatory period around the long axis of 20.16 days. The amplitude of rolling around the long axis is 42 deg. The angular momentum vector points within 10 deg of ecliptic longitude and latitude of (273, +16) deg. 2007 PA8 is only the second confirmed short-axis mode NPA rotator found in the near-Earth asteroid population, after (99942) Apophis [3]. References: [1] Hudson, S., 1993. Remote Sens. Rev. 8, 195-203. [2] Magri, C. et al., 2007. Icarus 186, 152-177. [3] Pravec et al., 2014. Icarus 233, 48-60. JF - American Geophysical Union Fall Meeting AU - Brozovic, M AU - Benner, L AU - Magri, C AU - Busch, M AU - Scheeres, D J AU - Giorgini, J D AU - Reddy, V AU - Hicks, M D AU - Jao, J S AU - Lee, C G AU - Snedeker, L G AU - Silva, M A AU - Slade, M A AU - Lawrence, K J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P31A EP - 3971 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/1769963679?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Goldstone+radar+evidence+for+short-axis+mode+non-principal+axis+rotation+of+near-Earth+asteroid+%28214869%29+2007+PA8&rft.au=Brozovic%2C+M%3BBenner%2C+L%3BMagri%2C+C%3BBusch%2C+M%3BScheeres%2C+D+J%3BGiorgini%2C+J+D%3BReddy%2C+V%3BHicks%2C+M+D%3BJao%2C+J+S%3BLee%2C+C+G%3BSnedeker%2C+L+G%3BSilva%2C+M+A%3BSlade%2C+M+A%3BLawrence%2C+K+J%3BAnonymous&rft.aulast=Brozovic&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 - The nitrate/perchlorate ratio on Mars as an indicator for habitability AN - 1769963658; 2016-017908 AB - Discovery of indigenous martian nitrogen in Mars surface materials has important implications for habitability and the potential development of a nitrogen cycle at some point in martian history. The Sample Analysis at Mars (SAM) instrument suite on the Mars Science Laboratory (MSL) Curiosity Rover detected evolved nitric oxide (NO) gas during pyrolysis of scooped aeolian sediments and drilled mudstone acquired in Gale Crater. The detection of NO suggests an indigenous source of fixed nitrogen, and may indicate a mineralogical sink for atmospheric N2 in the form of nitrate. The ratio of nitrate to oxychlorine species (e.g. perchlorate) may provide insight into the extent of development of a nitrogen cycle on Mars. Nitrate and perchlorate on Earth are geochemically related in arid environments such as the Atacama Desert and the Dry Valleys of Antarctica due to their similar mobilities and deposition mechanisms [1,2]. Here, low NO3-/ClO4- molar ratios ( approximately 1000) dominate, in comparison to other places on Earth, where the main nitrate source is biological fixation of N2 to NO3-, and there is no corresponding biological source of perchlorate, resulting in much higher NO3-/ClO4- molar ratios ( approximately 10,000). The NO3-/ClO4- molar ratio is estimated to be approximately 0.05 on Mars based on SAM measurements at Gale Crater [3]. The possibility exists that perchlorate brines could leach and increase nitrate concentrations at depth, increasing the martian NO3-/ClO4- ratio in the subsurface. However, it is unknown whether terrestrial NO3-/ClO4- molar ratios could be achieved by this mechanism. Nevertheless, the low NO3-/ClO4- the ratio detected by SAM suggests that N fixation to nitrate on Mars, whether biologically mediated or abiotic, was extremely limited compared to the potentially ongoing abiotic formation and deposition of oxychlorine species on the martian surface. [1] Kounaves, S. P. et al., Discovery of natural perchlorate in the Antarctic dry valleys and its global implications. ES&T44, No. 7 (2010): 2360-2364. [2] Lybrand, R. A., et al., The geochemical associations of nitrate and naturally formed perchlorate in the Mojave Desert, California, USA. GCA104 (2013): 136-147. [3] Ming, D. W. et al. Volatile and organic compositions of sedimentary rocks in Yellowknife Bay, Gale crater, Mars. Science 343, no. 6169 (2014): 1245267. JF - American Geophysical Union Fall Meeting AU - Stern, Jennifer C AU - Sutter, B AU - McKay, C P AU - Navarro-Gonzalez, R AU - Freissinet, Caroline AU - Conrad, P G AU - Mahaffy, P R AU - Archer, P D, Jr AU - Ming, D W AU - Martin-Torres, J AU - Zorzano, M P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P31D EP - 4015 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/1769963658?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+nitrate%2Fperchlorate+ratio+on+Mars+as+an+indicator+for+habitability&rft.au=Stern%2C+Jennifer+C%3BSutter%2C+B%3BMcKay%2C+C+P%3BNavarro-Gonzalez%2C+R%3BFreissinet%2C+Caroline%3BConrad%2C+P+G%3BMahaffy%2C+P+R%3BArcher%2C+P+D%2C+Jr%3BMing%2C+D+W%3BMartin-Torres%2C+J%3BZorzano%2C+M+P%3BAnonymous&rft.aulast=Stern&rft.aufirst=Jennifer&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 - Composition and bathymetry of Ligeia Mare, Titan, derived from its 2.2-cm wavelength thermal microwave emission AN - 1769963653; 2016-017861 AB - In May 2013, the bottom of Ligeia Mare (LM), Titan, was detected in the active altimetry mode of the Cassini RADAR at a maximum depth of 160 m (Mastroguiseppe et al., 2014). This was the first and, so far, only detection of the floor of an extraterrestrial sea. The difference of amplitude of the surface and bottom echoes was also investigated in order to evaluate losses by absorption in the liquid layer. In this paper, we analyze the passive radiometry data that were acquired concurrently with the active data, in order to provide an independent estimate of the liquid loss tangent and to determine the dielectric constant of both the liquid and the seafloor. We then used these results to convert the radiometry mosaic of LM into a low-resolution bathymetry map. For the last 10 years, the passive radiometer incorporated in the Cassini RADAR has been observing the 2.2-cm wavelength thermal microwave emission from Titan. Its calibration has been recently refined to an unprecedented accuracy of <1% (Janssen et al., this meeting). To date, all LM has been mapped in high-spatial resolution. The 2.2-cm emissivity measured over it is directly related to the depth of the seafloor, the most emissive areas being the deepest and vice-versa. Comparing the radiometry data acquired in May 2013 to a two-layer model and using as an input the altimetry-derived depth profile, we find that the loss tangent value that best fits data is very low and only slightly smaller than that found by Mastroguiseppe et al. (2014) (3.0+ or -1.0 10-5). This strongly suggests that the sea is composed of pure hydrocarbons with no or few suspended particles. A dielectric constant of 2.9 is inferred for the sea bottom pointing to water ice as its most likely composition rather than organic sediments. Lastly, the dielectric constant of the liquid is found to be <1.7, which, together with the low loss tangent, supports the idea of a methane-dominated composition (rather than ethane, Mitchell et al., submitted). JF - American Geophysical Union Fall Meeting AU - Le Gall, Alice A AU - Janssen, M A AU - Mastrogiuseppe, Marco AU - Hayes, Alexander G, Jr AU - Lorenz, R D AU - Encrenaz, P AU - Malaska, M J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23D EP - 4011 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/1769963653?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Composition+and+bathymetry+of+Ligeia+Mare%2C+Titan%2C+derived+from+its+2.2-cm+wavelength+thermal+microwave+emission&rft.au=Le+Gall%2C+Alice+A%3BJanssen%2C+M+A%3BMastrogiuseppe%2C+Marco%3BHayes%2C+Alexander+G%2C+Jr%3BLorenz%2C+R+D%3BEncrenaz%2C+P%3BMalaska%2C+M+J%3BAnonymous&rft.aulast=Le+Gall&rft.aufirst=Alice&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 - Evolution of Titan's seas and lakes during northern spring AN - 1769963649; 2016-017833 AB - Titan is the only body in the solar system, besides Earth, to have stable liquid seas at its surface [1]. The three main seas, known as Kraken Mare, Ligeia Mare, and Punga Mare are located at the North Pole where they cover a surface area of 500,000-, 126,000-, and 50,000-km2, respectively. In addition, several hundreds of small lakes are present, raising the questions of their relationships with the large seas. These hydrocarbon lakes and seas can be better imaged at optical wavelengths as the season moves towards summer solstice. At the same time, the North Pole area is receiving more solar light, which modifies the atmospheric circulation. Global Circulation Models (GCMs) predict stronger winds, more evaporation, and formation of methane clouds [2]. The Visual and Infrared Mapping Spectrometer (VIMS) has observed the North Pole area during several high inclined flybys. Mosaics in seven infrared atmospheric windows have been constructed. Several units can be distinguished by their surface albedo. The 5-micron bright unit has been interpreted as evaporitic material based on its location relative to the lakes and seas [3]. The spectral characteristics cannot be matched by a simple mixture of water ice and "typical Titan organic material" known as tholins. The composition of these different units is therefore still enigmatic. In addition, some of the spectral characteristics may be related to the texture of the units. The few passes over the North Pole have allowed the VIMS team to image some places several times looking for changes on the surface or/and in the lower atmosphere. Although GCMs predict evaporation of the seas and lakes and the formation of methane clouds [2], neither changes in the shorelines, nor clouds have been identified. Very recent specular reflection observations suggest the formation of waves on Punga [4], and therefore more active winds. In addition, the VIMS recently observed a brightening of the area between Punga, Kraken and Ligeia. Whether this change is related to surface processes or evaporation of the seas is being investigated. This work has been performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA. [1] Stofan, E. R. et al., Science, 2007 ; [2] Schneider, T. et al., Nature, 2012 ; [3] MacKenzie, S. M. et al., Icarus, in press; [4] Barnes, J. W., Ap. J., 2014. JF - American Geophysical Union Fall Meeting AU - Sotin, Christophe AU - Lawrence, K J AU - Le Mouelic, S AU - MacKenzie, S AU - Barnes, J W AU - Brown, R H AU - Cornet, T AU - Rodriguez, S AU - Baines, K H AU - Buratti, Bonnie J AU - Clark, R N AU - Nicholson, P D AU - Soderblom, J M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P22A EP - 03 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/1769963649?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+Titan%27s+seas+and+lakes+during+northern+spring&rft.au=Sotin%2C+Christophe%3BLawrence%2C+K+J%3BLe+Mouelic%2C+S%3BMacKenzie%2C+S%3BBarnes%2C+J+W%3BBrown%2C+R+H%3BCornet%2C+T%3BRodriguez%2C+S%3BBaines%2C+K+H%3BBuratti%2C+Bonnie+J%3BClark%2C+R+N%3BNicholson%2C+P+D%3BSoderblom%2C+J+M%3BAnonymous&rft.aulast=Lau&rft.aufirst=William&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ 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 - Modeling radar wave propagation through Comet 67p/Churyumov-Gerasimenko AN - 1769963633; 2016-018038 AB - The Comet Nucleus Sounding Experiment by Radiowave Transmission (CONSERT) onboard the Rosetta mission, as well as future cometary mission concepts, are planned to explore the inner structure of comets to complement our knowledge on the evolution of these small bodies that is currently only driven by surficial remote sensing measurements. An essential step in understanding the performance and the science return of current and future sounding experiments is an accurate understanding of the dielectric properties of comets and how they translate to the different physical, chemical and structural hypotheses of these bodies. To help constrain the ambiguities associated with this wide parametric space, we build eight parametric 3D dielectric models of the comet nucleus representing different structural and physical formation hypotheses, and we simulated the propagation of radar waves through each nucleus model using the finite difference time domain (FDTD) method. We extrapolated the shape model from the first Rosetta Navigation Camera images, while the different internal structures of each model are representative of existing theories of comet nuclei structures. The complex dielectric constants used in our models have been generated using mixing laws for a porous mixture of ice and meteoritic dust. Our simulations were performed at a lower frequency with respect to the central frequency of the CONSERT instrument due to computational memory limitations. The lower resolution obtained will still provide a sufficient and close approximation of the final experiment, given that the dielectric properties of the nucleus' materials are non-dispersive. Our results suggest that each model of the comet nucleus' interior structure produces a different radar signature in both the transmitted and reflected signals. In particular we note that scattering from inner-structure complexity compromises the visibility of the comet backside. Our simulation suggests that we can discern the different formation hypotheses with their associated internal structures for Comet 67P using the CONSERT experiment. Our results will support the CONSERT data interpretations to determine whether Comet 67P was generated by the aggregation of icy rubble, whether it presents a layered inner structure, and also whether it is a two-body system. JF - American Geophysical Union Fall Meeting AU - Scabbia, G AU - Heggy, E AU - Lasue, J AU - Kofman, W W AU - Palmer, E M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51C EP - 3965 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/1769963633?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+radar+wave+propagation+through+Comet+67p%2FChuryumov-Gerasimenko&rft.au=Scabbia%2C+G%3BHeggy%2C+E%3BLasue%2C+J%3BKofman%2C+W+W%3BPalmer%2C+E+M%3BAnonymous&rft.aulast=Scabbia&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 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 - Thermal inertia mapping using Mars climate sounder measurements AN - 1769963630; 2016-017933 AB - Previous work has shown inter-seasonal variations of the apparent thermal inertia at virtually all Martian latitudes. Because thermal inertia is mainly controlled by low variability parameters (e.g., grain sizes, degree of induration, rock abundance), these variations are usually interpreted in terms of subsurface layering and atmospheric contributions. Using atmospherically corrected surface temperatures at 32 mu m wavelength (channel B1) from the Mars Climate Sounder (MCS) onboard Mars Reconnaissance Orbiter, we analyze the inter-seasonal variations of the apparent thermal inertia. We show that most of the previously observed inertia variations are eliminated, indicating that a simple homogeneous regolith structure is sufficient to explain most of the measurements. Also, as expected, a fraction of the observed variations remain, especially at high latitudes. This is consistent with subsurface layering involving water ice below dry regolith inferred from other measurement techniques and modeling. This work strengthens our ability to identify and characterize surface/subsurface material thermal inertias, layering and physical heterogeneities in the Martian surface layer, and will help eliminate seasonal striping on high-resolution inertia maps. In addition to a global scale analysis, we will discuss observations in western Elysium Planitia where the Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) lander is planned to land in September 2016. We will provide predictions of the surface layer thermophysical properties, which are required for safe landing and successful scientific operations on the ground. JF - American Geophysical Union Fall Meeting AU - Piqueux, S AU - Kleinboehl, A AU - Golombek, M P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P33A EP - 4021 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/1769963630?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Thermal+inertia+mapping+using+Mars+climate+sounder+measurements&rft.au=Piqueux%2C+S%3BKleinboehl%2C+A%3BGolombek%2C+M+P%3BAnonymous&rft.aulast=Piqueux&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Possible global distribution of reduced carbon in surface sediments on Mars; evidence from volatiles released from the rocknest eolian drift, Gale Crater AN - 1769963589; 2016-017873 AB - The Rocknest eolian drift sediments were pyrolyzed in the Science Analysis at Mars (SAM) instrument on the Curiosity rover, yielding a small, discrete peak of C1-C3 volatiles, which were detected by direct mass spectrometry. This peak was observed to have a maximum intensity at approximately 820 degrees C in all four evolved gas analysis (EGA) experiments of the scooped and sieved (to < or = 150 mm) Rocknest sediment, though it is strongest in the second and third analyses. It was not observed in any blanks or subsequent samples of drilled rocks. Estimates of the total reduced carbon concentration are 16 + or - 4 ppm carbon by weight in the sample. Evolved gas analysis does not support definitive identification of trace molecules in gas mixtures, however the masses that define the observed peak are consistent with primarily CO2 (oxidized carbon phase; 9 + or - 2 ppmw carbon ) and CO, with 1-2 orders of magnitude less C1-3 hydrocarbons. The observed mass composition and temperature of evolution for the Rocknest-820 degrees C peak are suggestive of reduced carbon in a refractory state within the sample and inconsistent with reaction products that one might expect from terrestrial organic materials that are part of SAM's background. These carbon volatiles are most likely released from inclusions or decrepitating minerals and this entrapment may be responsible for their preservation after significant exposure to ionizing radiation and mechanical weathering. Detection of these volatiles indicates reduced carbon phases are present in some Martian surface sediment. Carbon concentrations for Rocknest are within the range reported for magmatic carbon in Martian meteorites and the composition is comparable to volatiles released from terrestrial basaltic glasses. The Rocknest drift deposit is considered representative of the global dust on Mars. The very-high-temperature volatile release from Rocknest implies a possible global distribution of reduced carbon on the Martian surface. The National Aeronautics and Space Administration (NASA) supported the research described here. JF - American Geophysical Union Fall Meeting AU - Eigenbrode, J L AU - Steele, A AU - Franz, H AU - Sutter, B AU - Mahaffy, P R AU - Conrad, P G AU - McAdam, A AU - Summons, R E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23E EP - 04 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/1769963589?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&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=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=NASA+COAST+and+OCEANIA+Airborne+Missions+Support+Ecosystem+and+Water+Quality+Research+in+the+Coastal+Zone&rft.au=Guild%2C+Liane%3BKudela%2C+Raphael%3BHooker%2C+Stanford%3BMorrow%2C+John%3BRussell%2C+Philip%3BPalacios%2C+Sherry%3BLivingston%2C+John%3BNegrey%2C+Kendra%3BTorres-Perez%2C+Juan%3BBroughton%2C+Jennifer&rft.aulast=Guild&rft.aufirst=Liane&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/ 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 - The detectability of heat flow signatures on Europa AN - 1769963560; 2016-018097 AB - Europa is planetary body with a young, tectonically active ice shell and a subsurface liquid water ocean. These characteristics make it one of the most promising places in the solar system to search for extant life beyond Earth. Conventional wisdom dictates that temperatures at the surface of Europa's ice shell are not expected to exceed 130K, which is well below the stability temperature of liquid water or brines. However, the regional or local-scale surface temperatures on Europa could be elevated due to regional or local scale heat flow anomalies as manifested by regional variations in tidal heating, recent cracks in the ice shell, or episodic eruptive plumes. Using a sophisticated ray-tracing thermal model developed for the moon and Mercury, we have explored the potential detectability of a range of heat flow anomalies on Europa from remote sensing measurements of the thermal emission and solar reflection from the Europa's surface. We find that the thermal emission signatures of potential heat flow anomalies can be differentiated from those caused by topography, roughness, exposed ice blocks and Jupiter shine. We further quantify the requirements for accuracy and signal-to-noise, as well as the requirements, for spatial, spectral and diurnal coverage, and conclude that heat flow signatures from sites of recent plume activity should be readily detectable, even if they are not currently active. JF - American Geophysical Union Fall Meeting AU - Paige, D A AU - Hayne, P O AU - Spencer, J R AU - Greenhagen, B T AU - Bennett, K A AU - Mellon, M T AU - Bandfield, J L AU - Aharonson, O AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P53B EP - 4010 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/1769963560?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+detectability+of+heat+flow+signatures+on+Europa&rft.au=Paige%2C+D+A%3BHayne%2C+P+O%3BSpencer%2C+J+R%3BGreenhagen%2C+B+T%3BBennett%2C+K+A%3BMellon%2C+M+T%3BBandfield%2C+J+L%3BAharonson%2C+O%3BAnonymous&rft.aulast=Paige&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 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - A laser altimeter for a planetary flyby mission AN - 1769963558; 2016-017982 AB - Several planetary missions are contemplated as flybys of planets, asteroids, and natural satellites. In many cases the option to orbit the body is impractical and observations during one or many flybys represent the only reasonable option. A laser altimeter provides measurements of topography and shape, surface roughness, and normal reflectivity at the laser wavelength and has been shown to be very effective at Mars, Mercury and the Moon when in orbit about the body and also when in proximity of an asteroid. But flyby missions are less able to provide the coverage and uniformity of the data being acquired by the instruments on the s/c because of the variation in range of the spacecraft from the body during a flyby. To address this problem, we have modified the design of our single beam Mercury Laser Altimeter (MLA), currently collecting observations on the MESSENGER mission, to provide an operating range of several thousand kilometers by increasing the output from the laser, providing a variable pulse-rate while maintaining constant electrical power, that can provide quasi-contiguous altimeter pixels during the flyby, and by storing the complete output from the detector. This approach will provide accurate topographic and shape data and enable improved orbit determination of the spacecraft by the use of orbital crossovers with minimal interpolation errors between measurements. The mass, power and data rate of the instrument is compatible with typical constraints in planetary missions. JF - American Geophysical Union Fall Meeting AU - Smith, David E AU - Zuber, M T AU - Sun, Xiaoli AU - Cavanaugh, John F AU - Neumann, G A AU - Mazarico, E AU - Genova, Antonio AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P41D EP - 3962 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/1769963558?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+laser+altimeter+for+a+planetary+flyby+mission&rft.au=Smith%2C+David+E%3BZuber%2C+M+T%3BSun%2C+Xiaoli%3BCavanaugh%2C+John+F%3BNeumann%2C+G+A%3BMazarico%2C+E%3BGenova%2C+Antonio%3BAnonymous&rft.aulast=Smith&rft.aufirst=David&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 - Performance modeling of orbital gamma-ray spectroscopy of carbonaceous asteroids; Monte-Carlo modeling of the HPGe Mars odyssey GRS AN - 1769963552; 2016-018033 AB - Orbital gamma-ray spectroscopy (GRS) experiments with high-resolution high-purity germanium (HPGe) detectors have successfully measured elemental abundances in the top approximately 50 cm of the surfaces of Mars and Mercury. GRS is sensitive to bulk concentrations of H, C, O, S, Fe, and Si among other elements. As these elements are also diagnostic of major carbonaceous and ordinary chondritic meteorite classes, we have simulated the science performance of a HPGe experiment in orbit around asteroids with model compositions corresponding to those of volatile-rich CI and CO carbonaceous chondritic meteorites. A circular orbit around a spherical asteroid was considered, with the altitude of the orbit equal to the radius of the asteroid (similar to the Dawn low-altitude mapping orbit "LAMO"). We simulated the gamma-ray and neutron emission from CI-like ( approximately 17 wt% structural H2O) and CO-like (<2 wt% structural H2O) asteroids using the MCNPX Monte-Carlo radiation transport code. The spacecraft background (based on a Dawn-like spacecraft model) was also modeled using MCNPX: this included background due to direct GCR/spacecraft interactions and also background due to asteroidal neutron flux on the spacecraft. The detector model was based on the Mars Odyssey Gamma Ray Spectrometer ("MOGRS"; Boynton et al. 2004, 2007), the largest HPGe detector flown to date. The spectra from the MCNPX output were broadened to a resolution based on the in-flight performance of MOGRS, FWHM = 4.1 keV at 1332 keV (Evans et al. 2006). Doppler broadening was also modeled where applicable. Line fluxes were then extracted from the combined background + asteroid spectrum and statistical uncertainties evaluated. Our simulations show that asteroids can be identified as having CI-like vs. CO-like compositions in H/Si, O/Si, S/Si, and C/Si with MOGRS within 4.5 months in a Dawn LAMO-like orbit. In addition, the Fe/Si and S/Si sensitivity are sufficient to distinguish CO and other low-hydrogen carbonaceous chondritic compositions from achondriticcarbon-rich (ureilitic) compositions. JF - American Geophysical Union Fall Meeting AU - Starr, R D AU - Lim, L F AU - Evans, L G AU - Parsons, A M AU - Zolensky, M E AU - Boynton, W V AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51C EP - 3959 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/1769963552?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Performance+modeling+of+orbital+gamma-ray+spectroscopy+of+carbonaceous+asteroids%3B+Monte-Carlo+modeling+of+the+HPGe+Mars+odyssey+GRS&rft.au=Starr%2C+R+D%3BLim%2C+L+F%3BEvans%2C+L+G%3BParsons%2C+A+M%3BZolensky%2C+M+E%3BBoynton%2C+W+V%3BAnonymous&rft.aulast=Starr&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Argus; an Io observer mission concept study from the 2014 NASA/JPL planetary science summer school AN - 1769963549; 2016-018009 AB - Jupiter's satellite Io represents the ideal target for studying extreme tidal heating and volcanism, two of the most important processes in the formation and evolution of planetary bodies. The 2011 Planetary Decadal Survey identified an Io Observer as a high-priority New Frontiers class mission to be considered for the decade 2013-2022. In response to the 2009 New Frontiers Announcement of Opportunity, we propose a mission concept for an Io Observer mission, named Argus (after the mythical watchman of Io), developed by the students of the August 2014 session of the Planetary Science Summer School hosted by NASA's Jet Propulsion Laboratory, together with JPL's Team X. The goals of our mission are: (i) Study the effects of tidal heating and its implications for habitability in the Solar System and beyond; (ii) Investigate active lava flows on Io as an analog for early Earth; (iii) Analyze the interaction of Io with the Jovian system through material exchange and magnetospheric activity; (iv) Study the internal structure of Io, as well as its chemical and tectonic history in order to gain insight into its formation and that of the other Galilean satellites. JF - American Geophysical Union Fall Meeting AU - Hays, Lindsay E AU - Holstein-Rathlou, C AU - Becerra, P AU - Basu, Ko AU - Davis, Byron AU - Fox, V K AU - Herman, J F C AU - Hughes, A C G AU - Keane, J T AU - Marcucci, Emma AU - Mendez-Ramos, E AU - Nelessen, Adam AU - Neveu, M AU - Parrish, Nathan AU - Scheinberg, A L AU - Wrobel, Jonathan S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43B EP - 3977 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/1769963549?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Argus%3B+an+Io+observer+mission+concept+study+from+the+2014+NASA%2FJPL+planetary+science+summer+school&rft.au=Hays%2C+Lindsay+E%3BHolstein-Rathlou%2C+C%3BBecerra%2C+P%3BBasu%2C+Ko%3BDavis%2C+Byron%3BFox%2C+V+K%3BHerman%2C+J+F+C%3BHughes%2C+A+C+G%3BKeane%2C+J+T%3BMarcucci%2C+Emma%3BMendez-Ramos%2C+E%3BNelessen%2C+Adam%3BNeveu%2C+M%3BParrish%2C+Nathan%3BScheinberg%2C+A+L%3BWrobel%2C+Jonathan+S%3BAnonymous&rft.aulast=Hays&rft.aufirst=Lindsay&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 - Influence of meteoroid streams on the lunar environment; results from LADEE AN - 1769963540; 2016-017855 AB - Impacts on the lunar surface from meteoroid streams encountered by the Earth-Moon system can result in measurable enhancements in both the lunar atmosphere and dust environment. Here we describe the annual meteoroid streams incident at the Moon during the Lunar Atmosphere and Dust Environment Explorer (LADEE) mission, and discuss their effects on the lunar environment. The LADEE science payload consisted of three instruments: the Ultraviolet/Visible Spectrometer (UVS); the Lunar Dust Experiment (LDEX); and the Neutral Mass Spectrometer (NMS). All three instruments detected the effects of encounters with meteoroid streams. During its time in lunar orbit, the LADEE mission coincided with 18 out of 35 IAU established annual streams. As stream meteoroids move on near-parallel trajectories we expect to observe asymmetries in their effects on the lunar environment. Based on predicted incident meteoroid mass fluxes at the Moon, one might expect the Geminids and Quadrantids to have had the most significant effect on the lunar environment during the mission. While a substantial exospheric response was clearly observed by the LADEE instruments during the Geminids, the apparent response during the Quadrantids was more subdued. One contribution to this difference was likely due to the location of the stream radiant on the lunar surface relative to LADEE's orbit. The Geminids radiant was predicted to be very close to LADEE's equatorial orbit, whereas the Quadrantids radiant was much farther poleward. This could explain the diminished exospheric activity and suggests that the response of the lunar environment to meteoroid streams could be relatively localized in some instances. Both short-term and long-term variations observed in the lunar sodium exosphere could be attributed to the instantaneous and cumulative effects of meteoroid stream bombardment. These and other effects will be discussed. JF - American Geophysical Union Fall Meeting AU - Stubbs, T J AU - Glenar, D A AU - Wang, Y AU - Sarantos, M AU - Hermalyn, B AU - Colaprete, A AU - Wooden, D H AU - Benna, M AU - Elphic, R C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23C EP - 4003 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/1769963540?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Influence+of+meteoroid+streams+on+the+lunar+environment%3B+results+from+LADEE&rft.au=Stubbs%2C+T+J%3BGlenar%2C+D+A%3BWang%2C+Y%3BSarantos%2C+M%3BHermalyn%2C+B%3BColaprete%2C+A%3BWooden%2C+D+H%3BBenna%2C+M%3BElphic%2C+R+C%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 - Determining firn compaction rates using repeat-track radar surveys in West Antarctica and Greenland AN - 1769963534; 2016-017695 AB - Measurements of surface elevation change must be properly partitioned between thickness changes from firn versus ice processes to determine the actual mass change because of the density difference between firn and ice. While ice dynamics controls changes in the ice column, fluctuations in both the snow accumulation and firn compaction rates result in variations in the firn column thickness. Several recent studies using both ground-based and airborne radar have greatly improved our understanding of the spatiotemporal variations in the accumulation rate. On the other hand, because of the difficulty in measuring firn compaction rates, the number of measurements remains quite low and the coverage is very sparse. Here, we present measurements of the firn compaction rate using the Center for Remote Sensing of Ice Sheets snow radar data from NASA's Operation IceBridge repeat-track surveys. To measure firn compaction rates from the aerial survey we first measure the depths to various horizons in the firn column. In the subsequent survey, we measure the depths to the same firn horizons but must remove the additional thickness from accumulated snow. To account for the additional accumulation, we measure the thickness to the buried horizon that represents the surface from the first survey. The change in thickness between the initial surface and the radar horizons provides total compaction and when divided by the time interval between surveys, provides the compaction rate. Specifically, we measure the spatiotemporal variations in the firn compaction rate in the Thwaites Glacier catchment area between 2009 and 2011. In addition, we present newly derived compaction rates from the dry-snow zone of Greenland. We also discuss the limitations of the method resulting from (1) the vertical resolution of the radar system, (2) colocation errors, (3) the dependence of radar wave speed on firn density, which varies in both space and time, and (4) measuring to a horizon of constant age rather than depth. JF - American Geophysical Union Fall Meeting AU - Medley, B AU - Ligtenberg, S AU - Kuipers Munneke, P AU - Joughin, Ian R AU - van den Broeke, M R AU - Gogineni, S AU - Nowicki, Sophie AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NS34A EP - 07 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/1769963534?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Determining+firn+compaction+rates+using+repeat-track+radar+surveys+in+West+Antarctica+and+Greenland&rft.au=Medley%2C+B%3BLigtenberg%2C+S%3BKuipers+Munneke%2C+P%3BJoughin%2C+Ian+R%3Bvan+den+Broeke%2C+M+R%3BGogineni%2C+S%3BNowicki%2C+Sophie%3BAnonymous&rft.aulast=Medley&rft.aufirst=B&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 - The Whipple mission; exploring the Kuiper Belt and the Oort Cloud AN - 1769963518; 2016-018047 AB - Whipple will characterize the small body populations of the Kuiper Belt and the Oort Cloud with a blind occultation survey, detecting objects when they briefly ( approximately 1 second) interrupt the light from background stars, allowing the detection of much more distant and/or smaller objects than can be seen in reflected sunlight. Whipple will reach much deeper into the unexplored frontier of the outer solar system than any other mission, current or proposed. Whipple will look back to the dawn of the solar system by discovering its most remote bodies where primordial processes left their imprint. Specifically, Whipple will monitor large numbers of stars at high cadences ( approximately 12,000 stars at 20 Hz to examine Kuiper Belt events; as many as approximately 36,000 stars at 5 Hz to explore deep into the Oort Cloud, where events are less frequent). Analysis of the detected events will allow us to determine the size spectrum of bodies in the Kuiper Belt with radii as small as approximately 1 km. This will allow the testing of models of the growth and later collisional erosion of planetesimals in the early solar system. Whipple will explore the Oort Cloud, detecting objects as far out as approximately 10,000 AU. This will be the first direct exploration of the Oort Cloud since the original hypothesis of 1950. Whipple is a Discovery class mission that will be proposed to NASA in response to the 2014 Announcement of Opportunity. The mission is being developed jointly by the Smithsonian Astrophysical Observatory, Jet Propulsion Laboratories, and Ball Aerospace & Technologies, with telescope optics from L-3 Integrated Optical Systems. JF - American Geophysical Union Fall Meeting AU - Alcock, C AU - Brown, M E AU - Gauron, T AU - Heneghan, C AU - Holman, M J AU - Kenter, A AU - Kraft, R AU - Lee, R AU - Livingston, J AU - McGuire, J J AU - Murray, S S AU - Murray-Clay, R AU - Nulsen, P AU - Payne, M J AU - Schlichting, H AU - Trangsrud, A AU - Vrtilek, J AU - Werner, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51D EP - 3977 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/1769963518?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+Whipple+mission%3B+exploring+the+Kuiper+Belt+and+the+Oort+Cloud&rft.au=Alcock%2C+C%3BBrown%2C+M+E%3BGauron%2C+T%3BHeneghan%2C+C%3BHolman%2C+M+J%3BKenter%2C+A%3BKraft%2C+R%3BLee%2C+R%3BLivingston%2C+J%3BMcGuire%2C+J+J%3BMurray%2C+S+S%3BMurray-Clay%2C+R%3BNulsen%2C+P%3BPayne%2C+M+J%3BSchlichting%2C+H%3BTrangsrud%2C+A%3BVrtilek%2C+J%3BWerner%2C+M%3BAnonymous&rft.aulast=Alcock&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Slopes from photoclinometry for the Mars InSight landing site selection process AN - 1769963510; 2016-017979 AB - Evaluating meter-scale slopes on the Martian surface continues to be an important activity for ascertaining the safety of potential landing sites and for characterizing terrains and their formation and modification processes. The Mars InSight lander is targeting a landing site in Elysium Planitia and the application of the point photoclinometry algorithm that correctly estimated the slope parameters for MER (Beyer et al., 2003) and for MSL (Beyer and Kirk, 2012) is also being applied to HiRISE imagery within the potential landing ellipses being considered. This allows rapid evaluation of slope parameters and also provides a consistency check with terrain models derived from stereo data. The largest source of error in the photoclinometry estimates of slope is the value of the atmospheric haze to subtract for each image. When a stereo-derived terrain model (either from HiRISE or CTX) is present, the slope statistics from that terrain model are used to help "tune" the photoclinometry-derived slopes for images that overlap that terrain model. In this way better slope data can be extrapolated into nearby regions than the photoclinometry technique alone would be able to accomplish. JF - American Geophysical Union Fall Meeting AU - Beyer, R A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P41D EP - 3959 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/1769963510?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Slopes+from+photoclinometry+for+the+Mars+InSight+landing+site+selection+process&rft.au=Beyer%2C+R+A%3BAnonymous&rft.aulast=Beyer&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Fluids and sulfate vein formation in Gale Crater, Mars AN - 1769963508; 2016-018006 AB - Curiosity detected sulfate veins crosscutting mudstones in the Sheepbed member of Gale Crater (Grotzinger et al., DOI: 10.1126/science.1242777; Manchon et al., DOI:10.1002/2013JE004588). We have used this information to evaluate the clay formation conditions in detail through thermochemical modeling (Bridges et al. submitted to JGR; this conference, session 2128) and compare the calculated fluid to those modeled for the nakhlite alteration mineralogy (Hicks et al. DOI: 10.1016/j.gca.2014.04.010, Bridges and Schwenzer, DOI: 10.1016/j.epsl.2012.09.044) and other Martian fluids. Concentrating the modeled Gale fluid though evaporation (or freezing) leads to a complex set of precipitates, which include silica, sulfate and halite. For example, 1 kg of brine produced by the alteration of a mixture of 70% amorphous component, 20% olivine and 10% host rock (W/R 1000, T= 10 degrees C) evaporated to dryness (less that 1% water left) will precipitate 70 mg of anhydrite, 46 mg of silica, 6.5 mg of halite and traces of pyrite, sulfur, calcite, and apatite. A fluid from this host rock with more mature alteration (W/R 100, T = 10 degrees C) precipitates the same minerals, but in very different abundances: the most abundant phase at dryness is halite (330 mg), followed by silica (88 mg) and anhydrite (30 mg). The calculated pH varies between 8 and 7.3 in both cases. If the evaporating brine is allowed to interact with the precipitate, a "dirty" sulfate layer or vein filling would result, which could subsequently be refined through dissolution and re-precipitation, a mechanism that, for example, is proposed for the gypsum veins at the UK Triassic coast near Watchet (Philipp doi:10.1017/S0016756808005451). Factors that influence the nature of the precipitate include alteration stage of the host rock during clay formation, and pH and degree of fractionation of the early formed minerals from the evaporating fluid. Using REMS data we also consider desiccation of sulfates in the near surface. JF - American Geophysical Union Fall Meeting AU - Schwenzer, Susanne AU - Bridges, J AU - Leveille, Richard AU - Westall, Frances AU - Wiens, R C AU - Mangold, Nicolas AU - McAdam, Amy AU - Conrad, Pamela G AU - Martin-Torres, Javier AU - Zorzano, M P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P42C 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/1769963508?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Fluids+and+sulfate+vein+formation+in+Gale+Crater%2C+Mars&rft.au=Schwenzer%2C+Susanne%3BBridges%2C+J%3BLeveille%2C+Richard%3BWestall%2C+Frances%3BWiens%2C+R+C%3BMangold%2C+Nicolas%3BMcAdam%2C+Amy%3BConrad%2C+Pamela+G%3BMartin-Torres%2C+Javier%3BZorzano%2C+M+P%3BAnonymous&rft.aulast=Schwenzer&rft.aufirst=Susanne&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 - Obliquity evolution of an early Venus AN - 1769963489; 2016-017817 AB - Present-day Venus is a slow rotator whose spin is controlled by solid-body and atmospheric thermal tides. However, conditions may have been far different 4 Gyr ago, when the Sun was fainter and most of the carbon within Venus may have been in solid form, implying a low-mass atmosphere. We investigate how a obliquity would have evolved on a hypothetical rapidly-rotating Early Venus. As with our previous investigation of a Moonless Earth, prograde rotation of our hypothesized Early Venus generally leads to larger variations in obliquity than does retrograde rotation. But this trend is far weaker for Venus than for a Moonless Earth, and doesn't hold for all initial obliquities and spin periods. The possible mechanisms for these variations and implications for early habitability will also be discussed. JF - American Geophysical Union Fall Meeting AU - Quarles, B AU - Barnes, J W AU - Lissauer, J J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11C EP - 3776 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/1769963489?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Obliquity+evolution+of+an+early+Venus&rft.au=Quarles%2C+B%3BBarnes%2C+J+W%3BLissauer%2C+J+J%3BAnonymous&rft.aulast=Quarles&rft.aufirst=B&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 - Simulating Pluto's atmosphere with a unified multiple modeling framework AN - 1769963472; 2016-017947 AB - We describe a unified modeling framework for simulating Pluto's atmospheric dynamics and surface interactions. The framework is based around the PlutoWRF general circulation model (GCM). The GCM can also be pared back to simpler implementations that share the same infrastructure. Two reduced versions of PlutoWRF are a 2D surface volatile exchange model and a 1D radiative-convective model. These implementations help specify physically self-consistent initial conditions for more computationally intensive 3D GCM runs, and provide insight into the results of those simulations. The 2D surface volatile exchange model provides predictions of surface conditions (surface pressure, ground temperature, ice coverage, etc.) with easy variation of input parameters (thermal inertia, ice albedo, volatile inventory, etc.) and the 1D radiative-convective model provides predictions of global-average air temperature with easy variation of input parameters (atmospheric composition, etc.) We compare our 2D surface volatile exchange model with others' work, and highlight the important role that ice sublimation and deposition play in the atmospheric dynamics. JF - American Geophysical Union Fall Meeting AU - Toigo, Anthony D AU - French, R G AU - Gierasch, P AU - Guzewich, S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P33B EP - 4035 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/1769963472?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Simulating+Pluto%27s+atmosphere+with+a+unified+multiple+modeling+framework&rft.au=Toigo%2C+Anthony+D%3BFrench%2C+R+G%3BGierasch%2C+P%3BGuzewich%2C+S%3BAnonymous&rft.aulast=Toigo&rft.aufirst=Anthony&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 - Estimating background and lunar contribution to neutrons detected by the Lunar Reconnaissance Orbiter (LRO) lunar exploration neutron detector (LEND) instrument AN - 1769963471; 2016-018035 AB - The fraction of hydrogen-bearing species embedded in planetary regolith can be determined from the ratio between measured epithermal neutron leakage flux and the flux measured from similar dry regolith. The Lunar Reconnaissance Orbiter (LRO) spacecraft is equipped with the Lunar Exploration Neutron Detector (LEND) instrument to measure embedded hydrogen in the Moon's polar regions and elsewhere. We have investigated the relative contribution of lunar and non-lunar (spacecraft-sourced) neutrons by modeling maps of the measured count rate from three of the LEND detector systems using linear combinations of maps compiled from the Lunar Prospector Neutron Spectrometer (LPNS) and the LEND detectors, demonstrating that the two systems are compatible and enabling reference signal to be inferred to enable detecting hydrogen and hydrogen-bearing volatiles. The pole-to-equator contrast ratio in epithermal neutrons indicates that the average concentration of hydrogen in the Moon's polar regolith above 80 degrees north or south latitude is approximately 110 ppmw, or 0.10+ or -0.01 wt% water-equivalent hydrogen. Above 88 degrees north or south, the concentration increases to approximately 140 ppmw, or 0.13+ or -0.02 wt% water-equivalent hydrogen. Nearly identical suppression of neutron flux at both the north and south poles, despite differences in topography and distribution of permanently-shadowed regions, supports the contention that hydrogen is broadly distributed in the polar regions and increasingly concentrated approaching the poles. Similarity in the degree of neutron suppression in low-energy and high-energy epithermal neutrons suggests that the hydrogen fraction is relatively uniform with depth down to approximately 1 m; the neutron leakage flux is insensitive to greater depth. JF - American Geophysical Union Fall Meeting AU - Livengood, T A AU - Mitrofanov, I G AU - Chin, G AU - Boynton, W V AU - Evans, L G AU - Litvak, M L AU - McClanahan, T P AU - Sagdeev, R AU - Sanin, A B AU - Starr, R D AU - Su, J J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51C EP - 3961 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/1769963471?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+background+and+lunar+contribution+to+neutrons+detected+by+the+Lunar+Reconnaissance+Orbiter+%28LRO%29+lunar+exploration+neutron+detector+%28LEND%29+instrument&rft.au=Livengood%2C+T+A%3BMitrofanov%2C+I+G%3BChin%2C+G%3BBoynton%2C+W+V%3BEvans%2C+L+G%3BLitvak%2C+M+L%3BMcClanahan%2C+T+P%3BSagdeev%2C+R%3BSanin%2C+A+B%3BStarr%2C+R+D%3BSu%2C+J+J%3BAnonymous&rft.aulast=Livengood&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 - GIADA on-board Rosetta; early dust grain detections and dust coma characterization of Comet 67P/C-G AN - 1769963438; 2016-017928 AB - GIADA (Grain Impact Analyzer and Dust Accumulator) flying on-board Rosetta is devoted to study the cometary dust environment of 67P/Churiumov-Gerasimenko. GIADA is composed of 3 sub-systems: the GDS (Grain Detection System), based on grain detection through light scattering; an IS (Impact Sensor), giving momentum measurement detecting the impact on a sensed plate connected with 5 piezoelectric sensors; the MBS (MicroBalances System), constituted of 5 Quartz Crystal Microbalances (QCMs), giving cumulative deposited dust mass by measuring the variations of the sensors' frequency. The combination of the measurements performed by these 3 subsystems provides: the number, the mass, the momentum and the velocity distribution of dust grains emitted from the cometary nucleus. No prior in situ dust dynamical measurements at these close distances from the nucleus and starting from such large heliocentric distances are available up to date. We present here the first results obtained from the beginning of the Rosetta scientific phase. We will report dust grains early detection at about 800 km from the nucleus in August 2014 and the following measurements that allowed us characterizing the 67P/C-G dust environment at distances less than 100 km from the nucleus and single grains dynamical properties. Acknowledgements. GIADA was built by a consortium led by the Univ. Napoli Parthenope & INAF-Oss. Astr. Capodimonte, IT, in collaboration with the Inst. de Astrofisica de Andalucia, ES, Selex-ES s.p.a. and SENER. GIADA is presently managed & operated by Ist. di Astrofisica e Planetologia Spaziali-INAF, IT. GIADA was funded and managed by the Agenzia Spaziale Italiana, IT, with a support of the Spanish Ministry of Education and Science MEC, ES. GIADA was developed from a PI proposal supported by the University of Kent; sci. & tech. contribution given by CISAS, IT, Lab. d'Astr. Spat., FR, and Institutions from UK, IT, FR, DE and USA. We thank the RSGS/ESAC, RMOC/ESOC & Rosetta Project/ESTEC for their outstanding work. Science support provided by NASA through the US Rosetta Project managed by JPL/California Institute of Technology. GIADA calibrated data will be available through the ESA's PSA web site (www.rssd.esa.int/index.php?project=PSA&page=index). Thanks Angioletta. JF - American Geophysical Union Fall Meeting AU - Rotundi, A AU - Della Corte, V AU - Accolla, M AU - Ferrari, M AU - Ivanovski, S AU - Lucarelli, F AU - Mazzotta Epifani, E AU - Sordini, R AU - Palumbo, P AU - Colangeli, L AU - Lopez-Moreno, J J AU - Rodriguez, J AU - Fulle, M AU - Bussoletti, E AU - Crifo, J F AU - Esposito, F AU - Green, S AU - Gruen, E AU - Lamy, P L AU - McDonnell, T AU - Mennella, V AU - Molina, A AU - Moreno, F AU - Ortiz, J L AU - Palomba, E AU - Perrin, J M AU - Rodrigo, R AU - Weissman, P R AU - Zakharov, V AU - Zarnecki, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P32B EP - 05 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/1769963438?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=GIADA+on-board+Rosetta%3B+early+dust+grain+detections+and+dust+coma+characterization+of+Comet+67P%2FC-G&rft.au=Rotundi%2C+A%3BDella+Corte%2C+V%3BAccolla%2C+M%3BFerrari%2C+M%3BIvanovski%2C+S%3BLucarelli%2C+F%3BMazzotta+Epifani%2C+E%3BSordini%2C+R%3BPalumbo%2C+P%3BColangeli%2C+L%3BLopez-Moreno%2C+J+J%3BRodriguez%2C+J%3BFulle%2C+M%3BBussoletti%2C+E%3BCrifo%2C+J+F%3BEsposito%2C+F%3BGreen%2C+S%3BGruen%2C+E%3BLamy%2C+P+L%3BMcDonnell%2C+T%3BMennella%2C+V%3BMolina%2C+A%3BMoreno%2C+F%3BOrtiz%2C+J+L%3BPalomba%2C+E%3BPerrin%2C+J+M%3BRodrigo%2C+R%3BWeissman%2C+P+R%3BZakharov%2C+V%3BZarnecki%2C+J%3BAnonymous&rft.aulast=Rotundi&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 - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Constraining Archean Earth's atmosphere with the geological record AN - 1769963428; 2016-017825 AB - A warm, water-bearing Archean Earth, when the Sun was young and faint, remains a paradox to the scientific world. Abundant geological data suggests that Archean Earth had standing water at the surface, despite the fainter Sun. An explanation of this paradox is vital to the understanding of Earth's history and coevolution with life. If the surface of the planet was not being kept warm by the Sun, which was 25% less luminous than now, it must have been kept warm a different way-by an atmospheric composition high in greenhouse gases. Constraints on these gases come from the geological record, which have provided proxies for the redox state of the atmosphere (limiting H (sub 2) and O (sub 2) ), the total atmospheric pressure, and the partial pressure of certain gases such as carbon dioxide (CO (sub 2) ) and methane (CH (sub 4) ). Previous attempts at solutions to the paradox are consistent with some, but not all, of the geological proxies. The constraints are used as inputs for a 1-D photochemical code, which calculates atmospheric composition and predicts the abundances of atmospheric gases that affect climate, particularly methane (CH (sub 4) ) and gaseous hydrogen (H (sub 2) ). A coupled 1-D radiative-convective climate code is then used to calculate the corresponding surface temperature. Critically, the improved photochemical code maintains strict redox boundary conditions, and is being further updated to ensure that the redox fluxes from volcanoes and mid-ocean ridge vents are consistent with both each other and the redox state of the mantle. These code improvements will lead to changes in both the inputs to the atmosphere from volcanoes and the sink for oxidants at mid-ocean ridges, in turn affecting the abundance of redox-sensitive greenhouse gases such as CH (sub 4) and H (sub 2) . The main purpose of this project is to extend simulations of the Archean surface environment down into the mantle, and to search for a solution to the faint young sun paradox that is consistent with the geological proxies. Beyond having interesting implications on Archean Earth's climatic history, this study effectively uses Archean Earth as an analog environment in which to test a new tool for simulating the effects of mantle geochemistry on (exo)planetary atmospheres and environments. JF - American Geophysical Union Fall Meeting AU - Horan, A M AU - Domagal-Goldman, S D AU - Claire, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11C EP - 3784 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963428?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+Archean+Earth%27s+atmosphere+with+the+geological+record&rft.au=Horan%2C+A+M%3BDomagal-Goldman%2C+S+D%3BClaire%2C+M%3BAnonymous&rft.aulast=Horan&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 - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Spectroscopic observations of comet C/2013 A1 (Siding Spring) from Mars using ChemCam, OMEGA and SPICAM AN - 1769963403; 2016-017993 AB - Comet Siding Spring will graze Mars on Oct. 19th 2014. Its closest approach from the centre of the planet will be 135,000 km, and its predicted visual magnitude as low as -5.3 (JPL Horizons web site). The observing conditions will be ideal to attempt spectroscopic measurements of the inner coma from the UV to the IR at an unprecedented spectral resolution from the instruments located on and around Mars. ChemCam is a Laser-Induced Breakdown Spectroscopy instrument operating on-board the Mars Science Laboratory rover to analyse the chemical composition of rocks and can be used for passive spectroscopy. ChemCam is equipped with high resolution spectrometers covering the optical range (240-850 nm) with a pixel resolution of 0.05nm up to 470nm and 0.2nm in the near-IR range. The ChemCam passive spectroscopy field of view is 0.65 mrad wide and covers several 100km projected on the coma. Based on predicted magnitude and inner coma intensity variations, we expect to retrieve spectral signatures around the nucleus. Simultaneously the 7 instruments on board Mars Express will take measurements in nadir and limb modes. We will merge the results obtained with ChemCam with those of the 2 imaging spectrometers SPICAM (110-310 nm resolution of 0.6nm and 1-1.7 mu m resolution of 1.5 nm) and OMEGA (457-910 nm resolution of 1.5 nm and 2.5-5.1 mu m resolution of 15 nm) to obtain the composition and spatial variation of emitting molecules in the different parts of the coma. The instruments will also monitor the atmosphere before and after the encounter to detect any change. We will report on the preparations for the observations and the spectroscopy results, with emphasis on the detection of complex organic molecules and the spatial distribution of H2O and OH in the inner coma. A decision will be made on the adequacy of risk reduction activities for the spacecraft, and planned science operations may need to be cancelled by ESOC. This work is supported by NASA, ESA and CNES. JF - American Geophysical Union Fall Meeting AU - Lasue, J AU - Gondet, Brigette AU - Bertaux, Jean-Loup AU - Barraclough, B L AU - Beck, Pierre AU - Bender, S AU - Bibring, J P AU - Bridges, Nathan T AU - Chaufray, J Y AU - Gasnault, Olivier AU - Herkenhoff, K E AU - Langevin, Y AU - Le Mouelic, Stephane AU - Lemmon, M T AU - Lewin, Eric AU - McConnochie, Timothy H AU - Martin-Torres, Javier AU - Maurice, Sylvestre AU - Meslin, P Y AU - Ming, Douglas W AU - Montmessin, F AU - Owen, T C AU - Rapin, William AU - Rocard, Francis AU - Wiens, R C AU - Zorzano, M P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P42A EP - 05 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/1769963403?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Spectroscopic+observations+of+comet+C%2F2013+A1+%28Siding+Spring%29+from+Mars+using+ChemCam%2C+OMEGA+and+SPICAM&rft.au=Lasue%2C+J%3BGondet%2C+Brigette%3BBertaux%2C+Jean-Loup%3BBarraclough%2C+B+L%3BBeck%2C+Pierre%3BBender%2C+S%3BBibring%2C+J+P%3BBridges%2C+Nathan+T%3BChaufray%2C+J+Y%3BGasnault%2C+Olivier%3BHerkenhoff%2C+K+E%3BLangevin%2C+Y%3BLe+Mouelic%2C+Stephane%3BLemmon%2C+M+T%3BLewin%2C+Eric%3BMcConnochie%2C+Timothy+H%3BMartin-Torres%2C+Javier%3BMaurice%2C+Sylvestre%3BMeslin%2C+P+Y%3BMing%2C+Douglas+W%3BMontmessin%2C+F%3BOwen%2C+T+C%3BRapin%2C+William%3BRocard%2C+Francis%3BWiens%2C+R+C%3BZorzano%2C+M+P%3BAnonymous&rft.aulast=Lasue&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Compressive strength of cometary surfaces derived from radar observations AN - 1769963393; 2016-018037 AB - Landing on a comet nucleus and probing it, mechanically using harpoons, penetrometers and drills, and electromagnetically using low frequency radar waves is a complex task that will be tackled by the Rosetta mission for Comet 67P/Churyumov-Gerasimenko. The mechanical properties (i.e. density, porosity and compressive strength) and the electrical properties (i.e. the real and imaginary parts of the dielectric constant) of the comet nucleus, constrain both the mechanical and electromagnetic probing capabilities of Rosetta, as well as the choice of landing site, the safety of the landing, and subsurface data interpretation. During landing, the sounding radar data that will be collected by Rosetta's CONSERT experiment can be used to probe the comet's upper regolith layer by assessing its dielectric properties, which are then inverted to retrieve the surface mechanical properties. These observations can help characterize the mechanical properties of the landing site, which will optimize the operation of the anchor system. In this effort, we correlate the mechanical and electrical properties of cometary analogs to each other, and derive an empirical model that can be used to retrieve density, porosity and compressive strength from the dielectric properties of the upper regolith inverted from CONSERT observations during the landing phase. In our approach we consider snow as a viable cometary material analog due to its low density and its porous nature. Therefore, we used the compressive strength and dielectric constant measurements conducted on snow at a temperature of 250 K and a density range of 0.4-0.9 g/cm3 in order to investigate the relation between compressive strength and dielectric constant under cometary-relevant density range. Our results suggest that compressive strength increases linearly as function of the dielectric constant over the observed density range mentioned above. The minimum and maximum compressive strength of 0.5 and 4.5 MPa corresponded to a dielectric constant of 2.2 and 3.4 over the density range of 0.4-0.9 g/cm3. This preliminary correlation will be applied to the case of porous and dust contaminated snow under different temperatures to assess the surface mechanical properties for Comet 67P. JF - American Geophysical Union Fall Meeting AU - ElShafie, A AU - Heggy, E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51C EP - 3964 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/1769963393?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Compressive+strength+of+cometary+surfaces+derived+from+radar+observations&rft.au=ElShafie%2C+A%3BHeggy%2C+E%3BAnonymous&rft.aulast=ElShafie&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 - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Laboratory simulations of permeability pertaining to biosignature development and preservation potential for Martian subsurface habitability AN - 1769963358; 2016-017953 AB - Sedimentological and mineralogical observations indicate that sandstones within the Eagle and Endurance crater sections of the Burns Formation of Meridiani Planum, Mars, were derived from sulfate-bearing altered basalt, possibly from a playa lake, and deposited by eolian and locally subaqueous processes in a eolian dune--sand sheet--interdune setting. Abrasion of rocks within the outcrop outlining Endurance Crater by the MER rover Opportunity revealed void spaces later determined to be secondary pore space created from the dissolution of soluble minerals from multiple groundwater movement (recharge) events. Previous investigations into the secondary porosity and permeability of rocks within the Karatepe section showed that the ability for fluid movement through the vertical sedimentary section was greatest between the Upper and Middle units at the Whatanga contact within Endurance Crater, where secondary porosity was measured to be approximately 40% of the rock. Our investigations into quantifying subsurface habitability involve simulating the paleo-groundwater environments on the micro-to-mesoscale (sub mm-scale to cm-scale) to determine how preservation potential changes with repeated water-rock interaction, varying fluid chemistry (pH, salinity, T, others), and pressure changes under Earth and Mars conditions. In addition to fluids, microbes (extremophiles) will be introduced into our simulation to observe how changing experimental input conditions impact the growth and development of biotic interactions and eventually biosignatures left behind within sedimentary microtextures. Moreover, detection of biosignatures using visual and UV methods will help inform the M2020 rover mission regarding in-situ analysis of abraded rock outcrops. Finally, results of this work will use terrestrial rocks and fluids from a known Mars analogue (the Rio Tinto basin) in order to aid in determining habitability and survivability in acidic and high saline conditions that are similar to Meridiani Planum, Mars. JF - American Geophysical Union Fall Meeting AU - Perl, S M AU - Corsetti, F A AU - Berelson, W AU - Nealson, K H AU - Bhartia, R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P33C EP - 4043 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/1769963358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Laboratory+simulations+of+permeability+pertaining+to+biosignature+development+and+preservation+potential+for+Martian+subsurface+habitability&rft.au=Perl%2C+S+M%3BCorsetti%2C+F+A%3BBerelson%2C+W%3BNealson%2C+K+H%3BBhartia%2C+R%3BAnonymous&rft.aulast=Perl&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Mineralogy of fluvio-lacustrine sediments investigated by Curiosity during the prime mission; implications for diagenesis AN - 1769963352; 2016-018002 AB - The Mars Science Laboratory rover Curiosity investigated sedimentary rocks that were deposited in a diversity of fluvio-lacustrine settings. The entire science payload was employed to characterize the mineralogy and chemistry of the Sheepbed mudstone at Yellowknife Bay and the Windjana sandstone at the Kimberley. Data from the CheMin instrument, a transmission X-ray diffractometer, were used to determine the quantitative mineralogy of both samples. The Sheepbed mudstone contains detrital basaltic minerals, calcium sulfates, iron oxides or hydroxides, iron sulfides, trioctahedral smectite, and amorphous material. The mineral assemblage and chemical data from APXS suggest that the trioctahedral smectite and magnetite formed authigenically as a result of alteration of olivine. The apparent lack of higher-grade phyllosilicates (e.g., illite and chlorite) and the presence of anhydrite indicate diagenesis at nearly equal 50-80 degrees C. The mineralogy of the Windjana sandstone is different than the Sheepbed mudstone. Windjana contains significant abundances of K-feldspar, low- and high-Ca pyroxenes, magnetite, phyllosilicates, and amorphous material. At least two distinct phyllosilicate phases exist: a 10 Aa phase and a component that is expanded with a peak at nearly equal 11.8 Aa. The identity of the expanded phase is currently unknown, but could be a smectite with interlayer H (sub 2) O, and the 10 Aa phase could be illite or collapsed smectite. Further work is necessary to characterize the phyllosilicates, but the presence of illite could suggest that Windjana experienced burial diagenesis. Candidates for the cementing agents include fine-grained phyllosilicates, Fe-oxides, and/or amorphous material. Interpretations of CheMin data from the Windjana sandstone are ongoing at the time of writing, but we will present an estimate of the composition of the amorphous material from mass balance calculations using the APXS bulk chemistry and quantitative mineralogy from CheMin. JF - American Geophysical Union Fall Meeting AU - Rampe, Elizabeth B AU - Morris, Richard V AU - Bish, D L AU - Vaniman, D T AU - Bristow, Thomas F AU - Chipera, S AU - Blake, David AU - Ming, Douglas W AU - Farmer, Jack AU - Morrison, Shaunna M AU - Treiman, A H AU - Achilles, C AU - Crisp, Joy A AU - Des Marais, David J AU - Downs, R T AU - Morookian, John Michael AU - Sarrazin, P AU - Spanovich, Nicole AU - Yen, Albert S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P42C EP - 04 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/1769963352?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Mineralogy+of+fluvio-lacustrine+sediments+investigated+by+Curiosity+during+the+prime+mission%3B+implications+for+diagenesis&rft.au=Rampe%2C+Elizabeth+B%3BMorris%2C+Richard+V%3BBish%2C+D+L%3BVaniman%2C+D+T%3BBristow%2C+Thomas+F%3BChipera%2C+S%3BBlake%2C+David%3BMing%2C+Douglas+W%3BFarmer%2C+Jack%3BMorrison%2C+Shaunna+M%3BTreiman%2C+A+H%3BAchilles%2C+C%3BCrisp%2C+Joy+A%3BDes+Marais%2C+David+J%3BDowns%2C+R+T%3BMorookian%2C+John+Michael%3BSarrazin%2C+P%3BSpanovich%2C+Nicole%3BYen%2C+Albert+S%3BAnonymous&rft.aulast=Rampe&rft.aufirst=Elizabeth&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - A detailed geomorphological sketch map of Titan's Afekan crater region AN - 1769963330; 2016-017862 AB - Due to Titan's uniquely thick atmosphere and organic haze layers, the most detailed images (with resolution of 300 meters per pixel) of the Saturnian moon's surface exist as Synthetic Aperture Radar (SAR) images taken by Cassini's RADAR instrument. Using the SAR data, we have been putting together detailed geomorphological sketch maps of various Titan regions in an effort to piece together its geologic history. We initially examined the Afekan region of Titan due to extensive SAR coverage. Features described on Afekan fall under the categories (in order of geologic age, extrapolated from their relative emplacement) of hummocky, labyrinthic, plains, and dunes. During our mapping effort, we also divided each terrain category into several different subclasses on a local level. Our map offers a chance to present and analyze the distribution, relationship, and potential formation hypotheses of the different terrains. In bulk, we find evidence for both Aeolian and fluvial processes. A particularly important unit found in the Afekan region is the unit designated "undifferentiated plains", or the "Blandlands" of Titan, a mid-latitude terrain unit comprising 25% of the moon's surface. Undifferentiated plains are notable for its relative featurelessness in radar and infrared. Our interpretation is that it is a fill unit in and around Afekan crater and other hummocky/mountainous units. The plains suggest that the nature of Titan's geomorphology seems to be tied to ongoing erosional forces and sediment deposition. Other datasets used in characterizing Titan's various geomorphological units include information obtained from radiometry, infrared (ISS), and spectrometry (VIMS). We will present the detailed geomorphological sketch map with all the terrain units assigned and labeled. JF - American Geophysical Union Fall Meeting AU - Schoenfeld, A AU - Malaska, M J AU - Lopes, R M C AU - Le Gall, A A AU - Birch, S P AU - Hayes, A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23D EP - 4013 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/1769963330?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+detailed+geomorphological+sketch+map+of+Titan%27s+Afekan+crater+region&rft.au=Schoenfeld%2C+A%3BMalaska%2C+M+J%3BLopes%2C+R+M+C%3BLe+Gall%2C+A+A%3BBirch%2C+S+P%3BHayes%2C+A%3BAnonymous&rft.aulast=Schoenfeld&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 - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geomorphic units on Titan AN - 1769963307; 2016-017867 AB - The Cassini-Huygens mission has revealed the surface of Titan in unprecedented detail. The Synthetic Aperture Radar (SAR) mode on the Cassini Titan Radar Mapper is able to penetrate clouds and haze to provide high resolution ( approximately 350 m spatial resolution at best) views of the surface geology. The instrument's other modes (altimetry, scatterometry, radiometry) also provide valuable data for interpreting the geology, as do other instruments on Cassini, in particular, the Imaging Science Subsystem (ISS) and the Visual and Infrared Mapping Spectrometer (VIMS). Continuing the initial work described in Lopes et al. (2010, Icarus, 212, 744-750), we have established the major geomorphologic unit classes on Titan using data from flybys Ta through T92 (October 2004-July 2013). We will present the global distribution of the major classes of units and, where there are direct morphological contacts, describe how these classes of units relate to each other in terms of setting and emplacement history. The classes of units are mountainous/hummocky terrains, plains, dunes, labyrinthic terrains and lakes. The oldest classes of units are the mountainous/hummocky and the labyrinthic terrains. The mountainous/hummocky terrains consist of mountain chains and isolated radar-bright terrains. The labyrinthic terrains consist of highly incised dissected plateaux with medium radar backscatter. The plains are younger than both mountainous/hummocky and labyrinthic unit classes. Dunes and lakes are the youngest unit classes on Titan; no contact is observed between the dunes and lakes but it is likely that both processes are still active. We have identified individual features such as craters, channels, and candidate cryovolcanic features. Characterization and comparison of the properties of the unit classes and the individual features with data from radiometry, ISS, and VIMS provides information on their composition and possible provenance. We can use these correlations to also infer global distribution on regions not covered by SAR. This is particularly important as SAR data will not provide complete coverage of Titan by the end of the Cassini mission. JF - American Geophysical Union Fall Meeting AU - Lopes, R M C AU - Malaska, M J AU - Schoenfeld, A AU - Birch, S P AU - Hayes, A G, Jr AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23D EP - 4019 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/1769963307?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geomorphic+units+on+Titan&rft.au=Lopes%2C+R+M+C%3BMalaska%2C+M+J%3BSchoenfeld%2C+A%3BBirch%2C+S+P%3BHayes%2C+A+G%2C+Jr%3BAnonymous&rft.aulast=Lopes&rft.aufirst=R+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 - Performances of the Mars Organic Molecule Analyzer (MOMA) GC-MS suite aboard ExoMars mission AN - 1769963289; 2016-017802 AB - The Mars Organic Molecule Analyzer (MOMA) aboard the ExoMars rover (Pasteur) will be a key analytical tool in providing chemical (molecular) information from the solid samples collected by the rover, with a particular focus on the characterization of the organic content. Samples will be extracted as deep as 2 meters below the martian surface to minimize effects of radiation and oxidation on organic materials. The core of the MOMA instrument is a dual source UV laser desorption / ionization (LDI) and pyrolysis gas chromatography (pyr-GC) ion trap mass spectrometer (ITMS) which provides the unique capability to characterize a broad range of compounds, including both of volatile and non-volatile species. Samples which undergo GC-ITMS analysis may be submitted to a derivatization process, consisting of the reaction of the sample components with specific reactants (MTBSTFA [1], DMF-DMA [2] or TMAH [3]) which increase the volatility of complex organic species. With the goal to optimize this instrumentation, and especially the GC-ITMS coupling, a series of tests is currently being carried out with prototypes of MOMA instrumentation and with the ETU models wich is similar to the flight model. The MOMA oven and tapping station are also part of these end-to-end experiments. Qualitative and quantitative tests has been done on gas, liquid and solid samples. The results obtained demonstrate the current status of the end-to-end performance of the gas chromatography-mass spectrometry mode of operation. Both prototypes individually meet the performance requirements, but this work particularly demonstrates the capabilities of the critical GC-MS interface. References: [1] Buch, A. et al. (2009) J chrom. A, 43, 143-151. [2] Freissinet et al. (2011) J Chrom A, 1306, 59-71. [3] Geffroy-Rodier, C. et al. (2009) JAAP, 85, 454-459. Acknowledgements: Funding provided by the Mars Exploration Program (point of contact, George Tahu, NASA/HQ). MOMA is a collaboration between NASA and ESA (PI Goesmann, MPS). MOMA-GC team acknowledges support from the French Space Agency (CNES), French National Programme of Planetology (PNP), National French Council (CNRS), Pierre Simon Laplace Institute. JF - American Geophysical Union Fall Meeting AU - Buch, Arnaud AU - Grand, Noel AU - Pinnick, Veronica T AU - Szopa, Cyril AU - Humeau, Olivier AU - Danell, R AU - van Amerom, F H W AU - Freissinet, Caroline AU - Glavin, Daniel P AU - Belmahdi, Imene AU - Coll, P J AU - Lustrement, Benjamin AU - Brinckerhoff, William B AU - Arevalo, R D, Jr AU - Stalport, Fabien AU - Steininger, H AU - Goesmann, F AU - Raulin, Francois AU - Mahaffy, Paul R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11A EP - 3748 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/1769963289?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Performances+of+the+Mars+Organic+Molecule+Analyzer+%28MOMA%29+GC-MS+suite+aboard+ExoMars+mission&rft.au=Buch%2C+Arnaud%3BGrand%2C+Noel%3BPinnick%2C+Veronica+T%3BSzopa%2C+Cyril%3BHumeau%2C+Olivier%3BDanell%2C+R%3Bvan+Amerom%2C+F+H+W%3BFreissinet%2C+Caroline%3BGlavin%2C+Daniel+P%3BBelmahdi%2C+Imene%3BColl%2C+P+J%3BLustrement%2C+Benjamin%3BBrinckerhoff%2C+William+B%3BArevalo%2C+R+D%2C+Jr%3BStalport%2C+Fabien%3BSteininger%2C+H%3BGoesmann%2C+F%3BRaulin%2C+Francois%3BMahaffy%2C+Paul+R%3BAnonymous&rft.aulast=Buch&rft.aufirst=Arnaud&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 - Number of references - 3 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Evidence for impact vaporization as a source of calcium in Mercury's exosphere AN - 1769963273; 2016-017849 AB - Mercury is surrounded by a surface-bounded exosphere with six known components: H, He, Na, K, Ca, and Mg. Of these components, Ca is of extreme temperature and has been observed in Mercury's exosphere for the past decade, after its discovery by Bida et al. (2000) from observations with the Keck telescope on Mauna Kea. Observations of the Ca exosphere by MESSENGER show a source concentrated on the dawn side. The time variation in that Ca signal repeats every Mercury year (Burger et al., 2014). Figure 1 shows how the Ca source rate varies with true anomaly angle, nu , which is the planet's orbital longitude measured from the direction of periapse. We suspect that these variations are due to impact vaporization resulting from infalling interplanetary dust. Our models of this scenario show that much of the seasonal variation in Ca is due to Mercury's substantial radial motion through the interplanetary dust cloud that results from Mercury's large orbital eccentricity (e=0.2). The seasonal Ca variation is enhanced further by Mercury's large orbital inclination (7 degrees relative to the ecliptic), which causes additional periodic variations in the dust infall rate as Mercury's vertical motion carries it repeatedly across the dust-disk's midplane. Note also the strong Ca enhancement near nu approximately 20 degrees (Fig 1) which requires an additional source of localized dust. The location of that peak is close to (but not precisely coincident with) Mercury's orbital longitude as it crosses the orbital plane of comet 2P/Encke. Bida, T. A. et al., 2000. Nature 404, 154-161. Burger, M. H. et al., 2014, Icarus 238, 51-58. Figure 1. Vaporization rate of Ca at Mercury from interplanetary dust (green line) versus true anomaly angle, plus an assumed cometary source centered at 25 degrees with a Gaussian half width of 15 degrees . The modeled source rates from Burger et al. (2014) are plotted in black. The sum of the disk and cometary sources is plotted in red. JF - American Geophysical Union Fall Meeting AU - Killen, R M AU - Hahn, J M AU - Burger, M H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P23C EP - 3994 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/1769963273?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Evidence+for+impact+vaporization+as+a+source+of+calcium+in+Mercury%27s+exosphere&rft.au=Killen%2C+R+M%3BHahn%2C+J+M%3BBurger%2C+M+H%3BAnonymous&rft.aulast=Killen&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - Spectral characterization of Phobos analogues under simulated environmental conditions AN - 1769963247; 2016-018045 AB - The surface of Phobos holds many keys for understanding its formation and evolution as well as the history and dynamics of the Mars-Phobos system. Visible to near infrared (VNIR) observations suggests that Phobos' surface is compositionally heterogeneous with "redder" and "bluer" units that both appear to be anhydrous in nature. Lunar highland spectra have been identified as spectral analogues for the "redder" and "bluer" units while thermally metamorphosed CI/CM chondrites, lab-heated carbonaceous chondrites and highly space weathered mafic mineral assemblages have been identified as the best analogs for the "bluer" surface units. Additionally, thermal infrared emissivity spectra indicate that if Phobos' surface is optically mature it may be rich in feldspar, which is consistent with VNIR observations of Phobos' surface being spectrally similar to lunar highland spectra. While remote observations provide key insights into the composition and evolution of planetary surfaces, a fundamentally important component to any remote compositional analysis of planetary surfaces is laboratory measurements of well-characterized samples measured under the appropriate environmental conditions. The vacuum environment of airless bodies creates a steep thermal gradient in the upper hundreds of microns of regolith. Lab studies of particulate rocks and minerals as well as selected lunar soils under vacuum and lunar-like conditions have identified significant effects of this thermal gradient on thermal infrared (TIR) spectral measurements. However recent lab measurements of carbonaceous chondrites demonstrated that simulated asteroid conditions do not affect the resulting emissivity spectra to the degree observed in lunar soils and is highly dependent on composition. Such lab studies demonstrate the high sensitivity of TIR emissivity spectra to environmental conditions under which they are measured and indicate that the near surface environment of all airless bodies do not spectrally behave in similar ways. An initial set of TIR emissivity measurements of Phobos analog materials will be made in the Simulated Lunar Environment chamber at the University of Oxford. These lab measurements will be characterized in an effort better understand how to interpret current and future TIR observations of Phobos. JF - American Geophysical Union Fall Meeting AU - Donaldson Hanna, K L AU - Bowles, N E AU - Edwards, C S AU - Glotch, T D AU - Greenhagen, B T AU - Pieters, C M AU - Thomas, I AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51D EP - 3973 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/1769963247?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Spectral+characterization+of+Phobos+analogues+under+simulated+environmental+conditions&rft.au=Donaldson+Hanna%2C+K+L%3BBowles%2C+N+E%3BEdwards%2C+C+S%3BGlotch%2C+T+D%3BGreenhagen%2C+B+T%3BPieters%2C+C+M%3BThomas%2C+I%3BAnonymous&rft.aulast=Donaldson+Hanna&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 - Helene; a plastic model AN - 1769963223; 2016-017995 AB - Helene, the Saturnian L4 Trojan satellite co-orbiting Dionne and sitting within the E-ring, possesses an unusual morphology characteristic of broad km-scale basins and depressions and a generally smooth surface patterned with streaks and grooves which are indicative of non-typical mass transport. Elevation angles do not appear to exceed 10 degrees at most. The nature and origin of the surface materials forming these grooved patterns is unknown. Given the low surface gravity (<5 mm/s (super 2) ), it hard to imagine how such transport features can come about with such low grades and surface gravities. Preliminary examinations of classical linear and nonlinear mass wasting mechanisms do not appear to reproduce these curious features. A suite of hypothesis that we examine is the possibility that the fine grain material on the surface has been either (i) accreted or (ii) generated as refractory detritus resulting from sublimation of the icy bedrock, and that these materials subsequently mass-waste like a non-Newtonian highly non-linear creeping flow. Modifying the landform evolution model MARSSIM to handle two new mass-wasting mechanism, the first due to glacial-like flow via Glen's Law and the second due to plastic-like flow like a Bingham fluid, we setup and test a number of likely scenarios to explain the observations. The numerical results qualitatively indicate that treating the mass-wasting materials as a Bingham material reproduces many of the qualitative features observed. We also find that in those simulations in which accretion is concomitant with Bingham mass-wasting, the long time-evolution of the surface flow shows intermittency in the total surface activity (defined as total surface integral of the absolute magnitude of the mass-flux). Detailed analyses identify the locations where this activity is most pronounced and we will discuss these and its implications in further detail. JF - American Geophysical Union Fall Meeting AU - Umurhan, O M AU - Moore, J M AU - Howard, A D AU - Schenk, P AU - White, Oliver L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P42B EP - 04 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/1769963223?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Helene%3B+a+plastic+model&rft.au=Umurhan%2C+O+M%3BMoore%2C+J+M%3BHoward%2C+A+D%3BSchenk%2C+P%3BWhite%2C+Oliver+L%3BAnonymous&rft.aulast=Umurhan&rft.aufirst=O&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 - Mars Organic Molecule Analyzer (MOMA) mass spectrometer status and science operations on the ExoMars rover AN - 1769963158; 2016-017798 AB - The Mars Organic Molecule Analyzer (MOMA) investigation on the 2018 ExoMars rover will examine the chemical composition of samples acquired from depths of up to two meters below the martian surface, where organics may be protected from radiative and oxidative degradation. MOMA combines analyses of acquired drill fines via (i) pyrolysis gas chromatography mass spectrometry (GCMS) and (ii) Mars ambient laser desorption mass spectrometry (LDMS), enabled by a fast-valve capillary ion inlet system. This "dual source" approach gives MOMA unprecedented breadth of detection over a wide range of molecular weights and volatilities. Analysis of nonvolatile, higher-molecular weight organics such as carboxylic acids and peptides even in the presence of significant perchlorate concentrations is enabled by the extremely short ( nearly equal 1 ns) pulses of the desorption laser. Use of the MOMA ion trap's tandem mass spectrometry (MS/MS) mode permits selective focus on key species for isolation and controlled fragmentation, providing structural analysis capabilities. The flight-like engineering test unit (ETU) of MOMA's ion trap mass spectrometer has been put through a battery of tests to assure robustness of operation in the martian environment, to assess science performance, and to prepare for the flight model build under extremely sterile conditions as required by ExoMars. These tests have included coupling campaigns with advanced prototypes of the MOMA GC (provided by the University of Paris) and the MOMA tapping station, ovens, and laser (provided by MPS and LZH). Planning for science operations has expanded with the development of scripts for MOMA's various parameterized modes, including MS/MS. Given the limited duration of the baseline mission (218 sols), MOMA will benefit from a thorough characterization of its performance with a variety of Mars analog samples and a careful comparison with current science results from the SAM experiment on MSL. Such preparation will enable efficient use of resources when MOMA analyzes unknown martian samples in conjunction with other ExoMars instruments such as the MicrOmega and Raman spectrometers. JF - American Geophysical Union Fall Meeting AU - Brinckerhoff, William B AU - van Amerom, F H W AU - Danell, R AU - Pinnick, Veronica T AU - Arevalo, R D, Jr AU - Li, Xiang AU - Hovmand, Lars AU - Mahaffy, Paul R AU - Goetz, W AU - Goesmann, F AU - Steininger, H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11A EP - 3744 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/1769963158?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Mars+Organic+Molecule+Analyzer+%28MOMA%29+mass+spectrometer+status+and+science+operations+on+the+ExoMars+rover&rft.au=Brinckerhoff%2C+William+B%3Bvan+Amerom%2C+F+H+W%3BDanell%2C+R%3BPinnick%2C+Veronica+T%3BArevalo%2C+R+D%2C+Jr%3BLi%2C+Xiang%3BHovmand%2C+Lars%3BMahaffy%2C+Paul+R%3BGoetz%2C+W%3BGoesmann%2C+F%3BSteininger%2C+H%3BAnonymous&rft.aulast=Brinckerhoff&rft.aufirst=William&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 - Seeking ancient microbial biosignatures with PIXL on Mars 2020 AN - 1769963149; 2016-017883 AB - Identifying ancient microbial biosignatures in the geologic record requires an assemblage of evidence, and almost never results from a single "smoking gun". When a potential biosignature such as a microfossil, organic deposit or stromatolite is found, sources of evidence for testing the biogenic hypothesis include the inherent properties of the feature itself, the assemblage characteristics of multiple candidate features, the geologic context of the features, and the relationship between changes in the features and changes in the geologic context. Given these diverse sources of evidence, multiple analytical techniques necessarily come into play. Some of the most powerful techniques emerging for ancient biosignature investigations are those that detailed, spatially correlated observations of fine texture, microstructure and composition (mineralogy, chemistry, organics etc). MicroX-ray fluorescence is a significant new method for in situ compositional analysis at sub-millimeter scales. Micro-XRF scans a focused X-ray beam across the surface of a rock to create a map of elemental composition at mm-cm scales, comprising individual spot measurements of 100 microns diameter. A micro-XRF instrument, PIXL (Planetary Instrument for X-ray Lithochemistry) was selected for flight aboard the Mars 2020 rover. We have used PIXL to analyze to diverse geological samples including ancient stromatolites, reduction spots, ooids, altered basalts, concretions and shales, and found that PIXL element maps are not only a highly effective way to quickly ascertain the compositional variability of the sample, but also that unexpected features typically emerge that can be critical for interpreting sedimentary, diagenetic and biological processes. For example, in two different stromatolite cases, elemental distribution revealed sedimentary and diagenetic textures that constrained the processes of stromatolite formation and implied biological influence. These textures were invisible in reflected light and too large to be observed at microscope scales. Fine scale elemental analysis by PIXL will be an effective way of searching for, and characterizing, potential ancient biosignatures on Mars. JF - American Geophysical Union Fall Meeting AU - Allwood, A AU - Hurowitz, J AU - Wade, L W A AU - Hodyss, R P AU - Flannery, D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P24A 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/1769963149?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Seeking+ancient+microbial+biosignatures+with+PIXL+on+Mars+2020&rft.au=Allwood%2C+A%3BHurowitz%2C+J%3BWade%2C+L+W+A%3BHodyss%2C+R+P%3BFlannery%2C+D%3BAnonymous&rft.aulast=Allwood&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 - 2016-03-03 N1 - CODEN - #07548 ER - TY - JOUR T1 - VERITAS; a mission to study the highest priority Decadal Survey questions for Venus AN - 1765881633; 2016-013843 AB - The Venus Emissivity, Radio Science, InSAR, Topography And Spectroscopy (VERITAS) Mission, a proposed NASA Discovery mission, seeks to produce high-resolution altimetry and synthetic aperture radar (SAR) imaging, thermal emissivity, and an improved gravity field. VERITAS addresses the highest priority Decadal survey questions: 1) Did Venus host ancient aqueous environments? 2) Can understanding the roles of physics, chemistry, geology, and dynamics in driving planetary atmospheres lead to a better understanding of climate change on Earth? 3) How have chemical and physical processes operated, interacted, and evolved? Using an interferometric mapping radar, a near infrared spectrometer, and radio science experiment, VERITAS will examine 1) the similarity of tessera plateau formation to continents on Earth, 2) the current forces driving tectonics and volcanism, and, perhaps most importantly, 3) inform our understanding of how stagnant lid planets evolve. Data from VIRTIS on Venus Express show that the highly deformed tessera plateaus, possible remnants of a prior regime on Venus, may be more felsic in composition than the surrounding plains, supporting the hypothesis they are similar to Earth's continents. However this interpretation is equivocal due to uncertainty in the available altimetry. VERITAS is designed to collect data with sufficient resolution to answer this question definitively, and also aid in the assessment of tesserae as a touchdown point for a future lander. Similarly, the enormous rift zones and mountain belts are manifestations of global scale tectonics within the last billion years on Venus, but present data are not adequate to determine the driving forces or whether they are presently active. VERITAS will provide such data through fine-resolution topographic maps and, if possible, measurements of any current-day crustal deformation. Finally, current data are highly suggestive of recent and active volcanism. VERITAS observations can tell us if current volcanism is limited to mantle plume heads or is more widespread. The geologic setting of present day volcanism or tectonism also holds lessons for predicting activity on Earth-sized planets elsewhere in the galaxy. Together these investigations allow us to assess just how similar or dissimilar the evolution of Venus and Earth has been. JF - American Geophysical Union Fall Meeting AU - Smrekar, S E AU - Elkins-Tanton, L T AU - Hensley, S AU - Campbell, B A AU - Gilmore, M S AU - Phillips, R J AU - Zebker, H A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21B EP - 3912 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/1765881633?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=VERITAS%3B+a+mission+to+study+the+highest+priority+Decadal+Survey+questions+for+Venus&rft.au=Smrekar%2C+S+E%3BElkins-Tanton%2C+L+T%3BHensley%2C+S%3BCampbell%2C+B+A%3BGilmore%2C+M+S%3BPhillips%2C+R+J%3BZebker%2C+H+A%3BAnonymous&rft.aulast=Smrekar&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 - Investigating the role of small vent volcanism during the development of Tharsis Province, Mars AN - 1765881500; 2016-013941 AB - Clusters of tens to hundreds of small volcanic vents have recently been recognized as a major component of Tharsis Province volcanism. These volcanic fields are formed from distributed-style, possibly monogenetic, volcanism and are composed of low sloped edifices with diameters of tens of kilometers and heights of tens to hundreds of meters. We report a new catalog of these small volcanic vents, now available through the USGS Astrogeology Science Center. This catalog was created with the use of gridded topographic data from the Mars Orbiter Laser Altimeter (MOLA) and images from the Thermal Emission Imaging System (THEMIS) and the High Resolution Stereo Camera (HRSC). We are now investigating isolated clusters of distributed volcanism in Tharsis with this dataset. We hypothesize that these clusters are formed from significant magmatic events that played a large role in the development of Tharsis. Currently, the catalog contains 1075 unique volcanic vents in the Tharsis Province. With the catalog, potentially isolated volcano clusters are identified with vent density estimation. Vent intensity for clusters is found to be 1 vent per 1000 sq km or less. Crater retention rates for one such cluster, Syria Planum, indicates that these distributed volcanic systems might continue as long as 700 Ma, or that monogenetic volcanic systems overprint older systems. Using a modified basal outlining algorithm with MOLA gridded data, shield volumes are found to be between 1-20 cubic km. Current results show distributed-style volcanism occurring in Tharsis orders of magnitude more dispersed than analogous volcano clusters on Earth, while individual edifices are found to be an order of magnitude larger than volcanoes in Earth clusters. Proof of concept results are reported for three identified clusters: Arsia Mons Caldera, Syria Planum, and Southern Pavonis Mons. JF - American Geophysical Union Fall Meeting AU - Richardson, J A AU - Bleacher, Jacob E AU - Connor, C AU - Connor, L AU - Glaze, Lori S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P41B EP - 3905 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/1765881500?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+the+role+of+small+vent+volcanism+during+the+development+of+Tharsis+Province%2C+Mars&rft.au=Richardson%2C+J+A%3BBleacher%2C+Jacob+E%3BConnor%2C+C%3BConnor%2C+L%3BGlaze%2C+Lori+S%3BAnonymous&rft.aulast=Richardson&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Probing planetary bodies for subsurface volatiles; GEANT4 models of gamma ray, fast, epithermal, and thermal neutron response to active neutron illumination AN - 1765881489; 2016-013975 AB - Using an active source of neutrons as an in situ probe of a planetary body has proven to be a powerful tool to extract information about the presence, abundance, and location of subsurface volatiles without the need for drilling. The Dynamic Albedo of Neutrons (DAN) instrument on Curiosity is an example of such an instrument and is designed to detect the location and abundance of hydrogen within the top 50 cm of the Martian surface. DAN works by sending a pulse of neutrons towards the ground beneath the rover and detecting the reflected neutrons. The intensity and time of arrival of the reflection depends on the proportion of water, while the time the pulse takes to reach the detector is a function of the depth at which the water is located. Similar instruments can also be effective probes at the polar-regions of the Moon or on asteroids as a way of detecting sequestered volatiles. We present the results of GEANT4 particle simulation models of gamma ray, fast, epithermal, and thermal neutron responses to active neutron illumination. The results are parameterized by hydrogen abundance, stratification and depth of volatile layers, versus the distribution of neutron and gamma ray energy reflections. Models will be presented to approximate Martian, lunar, and asteroid environments and would be useful tools to assess utility for future NASA exploration missions to these types of planetary bodies. JF - American Geophysical Union Fall Meeting AU - Chin, Gordon AU - Sagdeev, R AU - Su, J J AU - Murray, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43E EP - 03 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/1765881489?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+planetary+bodies+for+subsurface+volatiles%3B+GEANT4+models+of+gamma+ray%2C+fast%2C+epithermal%2C+and+thermal+neutron+response+to+active+neutron+illumination&rft.au=Chin%2C+Gordon%3BSagdeev%2C+R%3BSu%2C+J+J%3BMurray%2C+J%3BAnonymous&rft.aulast=Chin&rft.aufirst=Gordon&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 - Can Rosetta IES measure charged dust grains at comet 67P/C-G? AN - 1765880054; 2016-013947 AB - Comet 67P/C-G provides us with a natural laboratory to study the many open questions pertaining to dust-plasma interactions. The Rosetta spacecraft will follow Comet 67P/C-G along its trajectory through the inner solar system, giving us an unprecedented view of this dusty plasma environment. On board Rosetta is an Ion and Electron Sensor (IES) intended to measure plasma ions and electrons between nearly equal 4 eV/q and 22 keV/q. However, it is also speculated whether IES can measure charged dust grains with the correct energy-per-charge (E/q). Preliminary results [Skego et al., 2014] show that some dust grains originating from the comet and then becoming charged, likely possess the correct E/q for IES detection. However, until now, the question of microchannel plate (MCP) detection system effectiveness/efficiency in detecting these grains has been neglected. Lacking experimental results, we use current MCP models to explore the detection efficiencies of Rosetta IES to charged dust grains. We present our results, estimate fluxes, and provide a strong case for future experimental work in this field. JF - American Geophysical Union Fall Meeting AU - Clark, George B AU - Pollock, Craig J AU - Goldstein, R AU - Samara, Marilia AU - Broiles, T W AU - Mandt, K AU - Burch, J L AU - Sternovsky, Zoltan AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P41C EP - 3921 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/1765880054?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Can+Rosetta+IES+measure+charged+dust+grains+at+comet+67P%2FC-G%3F&rft.au=Clark%2C+George+B%3BPollock%2C+Craig+J%3BGoldstein%2C+R%3BSamara%2C+Marilia%3BBroiles%2C+T+W%3BMandt%2C+K%3BBurch%2C+J+L%3BSternovsky%2C+Zoltan%3BAnonymous&rft.aulast=Clark&rft.aufirst=George&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 - Hypotheses on the source of potassium enrichment in some Gale crater rocks AN - 1765879999; 2016-014030 AB - K2O contents of rocks and soils were measured or estimated with three instruments on Curiosity in Gale Crater, Mars: ChemCam (laser induced remote sensing), APXS (alpha -particle X-ray spectroscopy), and CheMin (X-ray diffraction analysis). In some sedimentary rocks the K2O contents are consistent with the rock's mineralogy, but in others K2O is higher than expected for the mineralogy. We have considered five hypotheses for the high abundance of K2O in Gale crater sediments. Hypothesis I; K2O is enriched in plagioclase feldspar due to crystallization at high temperatures and pressures. Hypothesis II, some sedimentary rocks are enriched in K2O-rich feldspars. Hypothesis III; rocks may have been enriched in K2O by secondary mineral formation. Hypothesis IV; dust has been incorporated into the rocks. Hypothesis V, K2O is contained in an amorphous or a nanocrystalline phase. Hypotheses IV and V are easily invalidated because the measured and inferred compositions of dust and amorphous and nanocrystalline material are not sufficiently enriched in K2O to cause the observed K2O in sedimentary rocks. Hypothesis I is possible because high-K2O plagioclase feldspars are sometimes observed in martian meteorites and sediments may have incorporated feldspars of these compositions. Hypothesis II is supported if potassium-rich feldspars, which have been identified by XRD of Gale crater sediments and have been found in some Martian meteorites, are concentrated in Gale sediments by fluvial processes. Hypothesis III is supported if correlations of K2O with other components of alteration minerals or secondary phases are found such as in a K2O-rich phyllosilicate, jarosite, alkali feldspar, or a potassium and fluorine-bearing phase. Hypotheses I and II may explain the elevated K2O in Gale Crater sediments, however, potassium enrichments must be compatible with mineralogy. Hypotheses III is supported if a K2O-rich secondary phase or phases can be identified. The cause of K2O enrichment could reveal much about past igneous, geochemical, and physical processes in Gale crater. JF - American Geophysical Union Fall Meeting AU - Fisk, M R AU - Dyar, M D AU - Bridges, J AU - Anderson, R B AU - Schmidt, M E AU - Gasnault, Olivier AU - Mangold, Nicolas AU - Tokar, R L AU - Wiens, R C AU - Gellert, R AU - Blake, D F AU - Schwenzer, S P AU - Edwards, P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P54B 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/1765879999?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hypotheses+on+the+source+of+potassium+enrichment+in+some+Gale+crater+rocks&rft.au=Fisk%2C+M+R%3BDyar%2C+M+D%3BBridges%2C+J%3BAnderson%2C+R+B%3BSchmidt%2C+M+E%3BGasnault%2C+Olivier%3BMangold%2C+Nicolas%3BTokar%2C+R+L%3BWiens%2C+R+C%3BGellert%2C+R%3BBlake%2C+D+F%3BSchwenzer%2C+S+P%3BEdwards%2C+P%3BAnonymous&rft.aulast=Fisk&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - The heat-pipe hypothesis for early crustal development of terrestrial planets AN - 1765879995; 2016-013893 AB - Crusts of the terrestrial planets other than Earth are dominated by mafic / ultramafic volcanics, with some contractional tectonics and minor extension. This description may also fit the early Earth. Therefore, a single process may have controlled early crustal development. Here we explore the hypothesis that heat-pipe cooling mode dominates early phases of terrestrial planet evolution. Volcanism is the hallmark of heat-pipe cooling: hot magma moves through the lithosphere in narrow channels, then is deposited and cools at the surface. A heat-pipe planet develops a thick, cold, downward-advecting lithosphere dominated by mafic/ultra-mafic flows. Contractional deformation occurs throughout the lithosphere as the surface is buried and forced toward smaller radii. Geologies of the Solar system's terrestrial planets are consistent with early heat-pipe cooling. Mercury's surface evolution is dominated by low-viscosity volcanism until nearly equal 4.1-4.0 Ga, with little activity other than global contraction since. Similar, younger features at Venus are commonly interpreted in terms of catastrophic resurfacing events with nearly equal 0.5 billion-year periodicity, but early support of high topography suggests a transition from heat-pipe to rigid-lid tectonics. Thick heat-pipe lithosphere may preserve the crustal dichotomy between Mars' northern and southern hemispheres, and explain the range in trace element abundances and isotopic compositions of Martian meteorites. At the Moon, global serial volcanism can explain refinement of ferroan anorthite rich rocks and coeval production of the "Mg-suite" rocks. The Moon's shape is out of hydrostatic equilibrium; it may represent a fossil preserved by thick early lithosphere. Active development of Jupiter's moon Io, which is warmed by tidal heating, is widely interpreted in terms of heat-pipe cooling. Given its potential ubiquity in the Solar system, heat-pipe cooling may be a universal process experienced by all terrestrial bodies of sufficient size. JF - American Geophysical Union Fall Meeting AU - Webb, A G AU - Moore, W B AU - Simon, J I AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P33E 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/1765879995?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+heat-pipe+hypothesis+for+early+crustal+development+of+terrestrial+planets&rft.au=Webb%2C+A+G%3BMoore%2C+W+B%3BSimon%2C+J+I%3BAnonymous&rft.aulast=Webb&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 - Vesta's Pinaria region; a window on Vesta's ancient crust AN - 1765879984; 2016-013982 AB - Asteroid 4 Vesta was the first of the NASA Dawn mission's two asteroid targets. After its 14-month orbit its instruments and science team produced maps from which geology, mineralogy, elemental composition and internal structure of Vesta were characterized. Using data from both the high altitude and low altitude orbits, we examine visible and infrared spectra from the Pinaria region which is located between 21 degrees -66 degrees S lat and 0 degrees -90 degrees E long in the Claudia coordinate system. We present data from the visible and near-infrared spectrometer to derive band parameter maps that are interpreted in terms of mineralogy and petrology. Within the Pinaria quadrangle is Matronalia Rupes, a rim of the nearly equal 505 km south polar basin, Rheasilvia. Spectra from this rim wall have band parameters of low-iron orthopyroxene that are a marker of diogenite meteorites. Studies of diogenites support their origin from the lower crust of the basaltic achondrite parent body, which has been demonstrated via analysis of Dawn's data sets, to be Vesta. Regolith on the smooth plains Northwest of the rim has band parameters indicative of howardites, a mixture of lower crust diogenites and crustal eucrites. The regolith here has more of a diogenitic component than eucritic, suggesting that basin ejecta mixed with the eucritic crust after formation of Rheasilvia. Another aspect of the Pinaria region is that the spectral signature of 2.8 mu m OH absorption is most often absent, making this region anhydrous compared to other regions more northerly and further east of Pinaria. Current analysis suggests that hydrated material is exogenic to Vesta. Examination of the spectra of the Pinaria crater's floor compared to its wall shows a broader 1.9 mu m band of varying absorption depth that indicates a range of pyroxene composition that is expected in a regolith consisting of mixed components from different depths. The lower, anhydrous crust of Vesta is revealed in the Pinaria region. JF - American Geophysical Union Fall Meeting AU - McFadden, L A AU - De Sanctis, Maria Cristina AU - Ammannito, Eleonora AU - Combe, Jean Philippe AU - Pieters, C M AU - Tosi, Federico AU - Nathues, A AU - Stephan, Katrin AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43F EP - 05 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/1765879984?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Vesta%27s+Pinaria+region%3B+a+window+on+Vesta%27s+ancient+crust&rft.au=McFadden%2C+L+A%3BDe+Sanctis%2C+Maria+Cristina%3BAmmannito%2C+Eleonora%3BCombe%2C+Jean+Philippe%3BPieters%2C+C+M%3BTosi%2C+Federico%3BNathues%2C+A%3BStephan%2C+Katrin%3BAnonymous&rft.aulast=McFadden&rft.aufirst=L&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - New statistical methods for the analysis of the cratering on Venus AN - 1765879967; 2016-013846 AB - The sparse crater population ( approximately 1000 craters) on Venus is the most important clue of determining the planet's surface age and aids in understanding its geologic history. What processes (volcanism, tectonism, weathering, etc.) modify the total impact crater population? Are the processes regional or global in occurrence? The heated debate on these questions points to the need for better approaches. We present new statistical methods for the analysis of the crater locations and characteristics. Specifically: 1) We produce a map of crater density and the proportion of no halo craters (inferred to be modified) by using generalized additive models, and smoothing splines with a spherical spline basis set. Based on this map, we are able to predict the probability of a crater has no halo given that there is a crater at that point. We also obtain a continuous representation of the ratio of craters with no halo as a function of crater density. This approach allows us to look for regions that appear to have experienced more or less modification, and are thus potentially older or younger. 2) We examine the randomness or clustering of distributions of craters by type (e.g. dark floored, intermediate). For example, for dark floored craters we consider two hypotheses: i) the dark floored craters are randomly distributed on the surface; ii) the dark floored craters are random given the locations of the crater population. Instead of only using a single measure such as average nearest neighbor distance, we use the probability density function of these distances, and compare it to complete spatial randomness to get the relative probability density function. This function gives us a clearer picture of how and where the nearest neighbor distances differ from complete spatial randomness. We also conduct statistical tests of these hypotheses. Confidence intervals with specified global coverage are constructed. Software to reproduce the methods is available in the open source statistics software R. Both the methods and the code are extensible to similar marked spatial point process applications. JF - American Geophysical Union Fall Meeting AU - Xie, M AU - Smrekar, S E AU - Handcock, M S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21B EP - 3915 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/1765879967?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+statistical+methods+for+the+analysis+of+the+cratering+on+Venus&rft.au=Xie%2C+M%3BSmrekar%2C+S+E%3BHandcock%2C+M+S%3BAnonymous&rft.aulast=Xie&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Visible and near-infrared spectra of manganese oxides; detecting high manganese phases in Curiosity Mastcam multispectral images AN - 1765879904; 2016-013902 AB - The Mars Science Laboratory Curiosity rover's Chemcam instrument has identified manganese in relatively high abundance on several rock surfaces. The manganese abundances are several orders of magnitude greater than has been previously identified on Mars, indicating the presence of a manganese-rich phase. Although the specific phase has yet to be identified, these results suggest that the martian surface may have been much more highly oxidizing than has previously been recognized. The presence of a manganese-rich phase could provide an additional indicator of habitable aqueous environments. Given the importance of manganese for understanding past habitability, and the high abundances identified with Chemcam, we investigate the utility of using Mastcam multispectral imaging surveys to identify areas for subsequent detailed analysis with Chemcam. Vempati et al. showed that Mn (super 3+) affect the reflectance spectra of Mn-bearing minerals. Specifically, relatively weak features due to electronic transitions and crystal field effects are observed in Mn-enriched hematites and geothites at 454, 554, 596 and 700 nm. The Mastcam-34 medium angle camera has filter band-passes at 550, 675 and 750 nm, and we will explore the utility of using these bands (or combinations thereof) to determine if there is a contribution of Mn-bearing phases on spectra, specifically those that have been identified as having elevated Mn with Chemcam. The most common Mn-bearing mineral phase in terrestrial varnishes, Birnessite, has charge-transfer features that are similar to Fe-oxides but are centered at slightly longer wavelength band positions. Longer wavelength features are also common for other Mn-oxides, and this could be used to distinguish these phases from other Fe-oxide components. In this study we will present visible to near-infrared (0.4 - 3 mu m) reflectance spectra on a suite of Mn-oxide laboratory standards. The set of standards includes Mn-oxide abundances that vary from less than 1 up to nearly equal 75 wt.%. Spectra will be downsampled to Mastcam bandpasses to determine if the effects of Mn-bearing phases could be identified from Mastcam multispectral observations in Gale Crater. JF - American Geophysical Union Fall Meeting AU - Hardgrove, C J AU - Lanza, Nina AU - Bell, J F, III AU - Wiens, R C AU - Johnson, Jeffrey R AU - Morris, Richard V AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P34A 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/1765879904?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Visible+and+near-infrared+spectra+of+manganese+oxides%3B+detecting+high+manganese+phases+in+Curiosity+Mastcam+multispectral+images&rft.au=Hardgrove%2C+C+J%3BLanza%2C+Nina%3BBell%2C+J+F%2C+III%3BWiens%2C+R+C%3BJohnson%2C+Jeffrey+R%3BMorris%2C+Richard+V%3BAnonymous&rft.aulast=Hardgrove&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Global volcanism on Mercury at about 3.8 Ga AN - 1765879902; 2016-013852 AB - Smooth plains occupy c. 27% of the surface of Mercury. Embayment relations, spectral contrast with surroundings, and morphologic characteristics indicate that the majority of these plains are volcanic. The largest deposits are located in Mercury's northern hemisphere and include the extensive northern plains (NP) and the Caloris interior and exterior plains (with the latter likely including basin material). Both the NP and Caloris deposits are, within statistical error, the same age ( approximately 3.8-3.9 Ga). To test whether this age reflects a period of global volcanism on Mercury, we determined crater size-frequency distributions for four smooth plains units in the planet's southern hemisphere interpreted to be volcanic. Two deposits are situated within the Beethoven and Tolstoj impact basins; two are located close to the Debussy and the Alver and Disney basins, respectively. Each deposit hosts two populations of craters, one that postdates plains emplacement and one that consists of partially to nearly filled craters that predate the plains. This latter population indicates that some time elapsed between formation of the underlying basement and plains volcanism, though we cannot statistically resolve this interval at any of the four sites. Nonetheless, we find that the age given by the superposed crater population in each case is approximately 3.8 Ga, and crater density values are consistent with those for the NP and Caloris plains. This finding supports a global phase of volcanism near the end of the late heavy bombardment of Mercury and may indicate a period of widespread partial melting of Mercury's mantle. Notably, superposition relations between smooth plains, degraded impact structures, and contractional landforms suggest that by this time interior cooling had already placed Mercury's lithosphere in horizontal compression, tending to inhibit voluminous dike-fed volcanism such as that inferred responsible for the NP. Most smooth plains units, including the Caloris plains and our four study sites, are spatially associated with impact structures; even the NP lie in a regional depression that may be impact-related. Because impacts remove overburden, deposit subsurface heat, and relax pre-existing stress, basins and craters may represent preferential sites for volcanic resurfacing on a globally contracting planet. JF - American Geophysical Union Fall Meeting AU - Byrne, P K AU - Ostrach, L R AU - Denevi, B W AU - Head, J W, III AU - Hauck, S A, II AU - Murchie, S L AU - Solomon, S C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21C EP - 3932 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/1765879902?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Global+volcanism+on+Mercury+at+about+3.8+Ga&rft.au=Byrne%2C+P+K%3BOstrach%2C+L+R%3BDenevi%2C+B+W%3BHead%2C+J+W%2C+III%3BHauck%2C+S+A%2C+II%3BMurchie%2C+S+L%3BSolomon%2C+S+C%3BAnonymous&rft.aulast=Byrne&rft.aufirst=P&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 - Deep-seated reverse faults in Mare Crisium, the Moon AN - 1765879884; 2016-013911 AB - Mare Crisium partially fills a Nectarian basin 556X455 km in diameter on the lunar nearside, one of several such basins associated with a mass concentration or "mascon." The basin's interior topography is dominated by an elevated, circumferential bench that extends inward from the perimeter by nearly equal 20% of the basin's radius. A set of wrinkle ridges, landforms that are interpreted as folds over reverse faults that may be blind or surface breaking, lies along the inner edge of this bench. With the elastic dislocation program COULOMB we matched model solutions for surface displacements to topographic profiles across five of these wrinkle ridges. We find that the faults underlying the ridges each accumulated substantial along-slip displacement (c. 0.5-1.5 km) and, despite differences in geometry (some faults are planar whereas others are listric), they all penetrate the lunar lithosphere to depths of 18-20 km. Notably, the wrinkle ridges that follow the inner edge of the elevated bench are spatially coincident with the outer boundary of the highest free-air gravity anomaly values for the Crisium mascon returned by the Gravity Recovery and Interior Laboratory (GRAIL) mission. Further, a GRAIL-derived crustal thickness model of the basin indicates that the subsurface geometry of the deep-seated faults bears a strong resemblance to the shape of the crust-mantle boundary beneath Crisium. The basin's mascon, therefore, appears to be structurally bound by a set of individual features that together define a shallowly and outward-dipping reverse ring-fault system. TEKTON finite-element models of lithospheric loading within the basin suggest that the combined action of a subsiding superisostatic mantle plug and a rising subisostatic collar of thickened crust produce a stress state consistent with the orientation of, and sense of displacement along, these ring faults. Importantly, Crisium is not the only lunar mare-filled basin that hosts both a mascon and a topographic bench. Humorum, Imbrium, Nectaris, Orientale, and Serenitatis also feature wrinkle-ridge-bounded, arcuate portions of elevated topography within their perimeters-and so they, too, may be underlain by deep-seated reverse faults. JF - American Geophysical Union Fall Meeting AU - Klimczak, C AU - Byrne, P K AU - McGovern, P J, Jr AU - Mazarico, E AU - James, P B AU - Neumann, Gregory A AU - Zuber, M T AU - Solomon, S C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P34C EP - 04 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/1765879884?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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-seated+reverse+faults+in+Mare+Crisium%2C+the+Moon&rft.au=Klimczak%2C+C%3BByrne%2C+P+K%3BMcGovern%2C+P+J%2C+Jr%3BMazarico%2C+E%3BJames%2C+P+B%3BNeumann%2C+Gregory+A%3BZuber%2C+M+T%3BSolomon%2C+S+C%3BAnonymous&rft.aulast=Klimczak&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - The water regime of Ceres and its potential habitability AN - 1765879882; 2016-013981 AB - Ceres is the largest object in the main asteroid belt of the Solar System, with a diameter of 940 km and accounting for nearly equal 1/3 of the total mass of the asteroid belt. The recent unequivocal discovery of water vapor associated with localized sources on Ceres by Herschel Space Telescope confirmed its enrichment in volatiles as suggested by its low density and previous observations and theoretical models. Hence water must have played a significant role in the evolution of Ceres and even affected its current state. Spectral reflectance of Ceres surface reveals the pervasive signature of hydrated minerals and carbonates. The albedo and spectral homogeneity suggest that processes involving liquid-phase activity at the global scale may have occurred in the past. The current evolution models of Ceres indicate that liquid water was present following an early differentiation and drove hydrothermal activity for a few tens of My since its formation. Silicate leaching could lead to the concentration of soluble species in an ocean that could play a role in lowering the freezing temperature of that layer. The likely accretion of low-eutectic species such as ammonia hydrates could have promoted the long-term preservation of a deep liquid layer at the base of an icy shell over extended periods of time (possibly until present). The significance of water on Ceres and its active nature as revealed by Herschel observations not only suggest that Ceres is an object that potentially hides important clues about volatile history in the inner solar system, but also indicate a world of potential astrobiological interest. The Dawn spacecraft is scheduled to arrive at Ceres in March 2015 to perform detailed geological, spectroscopic, compositional, and gravity mapping. In the mean time, we have begun an observing campaign using ground- and space-based facilities covering wavelengths from UV to sub-mm, to fully characterize the nature of water and hydration features detected at Ceres, and to facilitate theoretical studies. We expect our knowledge of the history and current status of water on Ceres to be significantly advanced in the coming years. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. JF - American Geophysical Union Fall Meeting AU - Li, J Y AU - Sykes, M V AU - Castillo, Julie C AU - McFadden, L A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43F EP - 04 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/1765879882?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+water+regime+of+Ceres+and+its+potential+habitability&rft.au=Li%2C+J+Y%3BSykes%2C+M+V%3BCastillo%2C+Julie+C%3BMcFadden%2C+L+A%3BAnonymous&rft.aulast=Li&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Formation of Fe/Mg smectite under acidic conditions from synthetic Adirondack basaltic glass; an analog to Fe/Mg smectite formation on Mars AN - 1765879857; 2016-013929 AB - Smectite has been detected as layered material hundreds of meters thick, in intracrater depositional fans, in plains sediments, and deposits at depth on Mars. If early Mars hosted a dense CO (sub 2) atmosphere, then extensive carbonate should have formed in the neutral/alkaline conditions expected for smectite formation. However, large carbonate deposits on Mars have not been discovered. Instead of neutral to moderately alkaline conditions, early Mars may have experienced mildly acidic conditions that allowed for Fe/Mg smectite formation but prevented widespread carbonate formation. The objective of this work is to demonstrate that Fe(II)/Mg-saponite and nontronite can form in mildly acidic solutions (e.g., pH 4). Synthetic basaltic glass (< 53 mu m) of Adirondack rock class composition was exposed to pH 4 (acetic acid buffer) and N2 purged (anoxic) solutions amended with 0 and 10 mM Mg or Fe(II). Basaltic glass in these solutions was heated to 200 degrees C in batch reactors for 1, 7, and 14 days. X-ray diffraction analysis of reacted materials detected the presence of phyllosilicates as indicated by a nearly equal 15.03-15.23Aa (001) peak. Smectite was confirmed as the phyllosilicate after treatments with glycerol and KCl and heating to 550 degrees C. Trioctahedral saponite was confirmed by the presence of a 4.58 to 4.63 Aa (02l) and 1.54Aa (060) peaks. Saponite concentration was highest, as indicated by XRD peak intensity, in the 10 mM Mg treatment followed by the 0 mM and then 10 mM Fe(II) treatments. This order of sapontite concentration suggests that Fe(II) additions may have a role in slowing the kinetics of saponite formation relative to the other treatments. Nontronite synthesis was attempted by exposing Adirondack basaltic glass to pH 4 oxic solutions (without N2 purge) at 200 degrees C for 14 days. X-ray diffraction analysis indicated that mixtures of trioctahedral (saponite) and dioctahedral (nontronite) may have formed in these experiments based on the 02l and 060 peaks. Moessbauer analysis coupled with future experiments are planned to verify if nontronite can be formed under mildly acidic and oxic conditions. Results of this work demonstrate that acidic conditions could have occurred on an early Mars, which allowed for smectite formation but inhibited carbonate formation. JF - American Geophysical Union Fall Meeting AU - Sutter, B AU - Peretyazhko, T AU - Morris, Richard V AU - Ming, Douglas W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P41A EP - 3892 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/1765879857?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Formation+of+Fe%2FMg+smectite+under+acidic+conditions+from+synthetic+Adirondack+basaltic+glass%3B+an+analog+to+Fe%2FMg+smectite+formation+on+Mars&rft.au=Sutter%2C+B%3BPeretyazhko%2C+T%3BMorris%2C+Richard+V%3BMing%2C+Douglas+W%3BAnonymous&rft.aulast=Sutter&rft.aufirst=B&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 - Current state of topographic mapping of Ganymede; squeezing the most from JUICE AN - 1765879752; 2016-013909 AB - JUICE, ESA's planned Ganymede orbiter, and NASA's proposed Europa Clipper, won't arrive for some time, and many issues concerning Ganymede's geologic history and evolution remain. Topographic mapping will be a key component of JUICE orbital and Clipper flyby mapping and an understanding of Ganymede topography can also help guide instrument development. Topographic data for Ganymede are based almost entirely on Voyager and Galileo image analysis and are sparse. No more than 20% of the surface (which exceeds that of Mercury in area in total) is presently mappable. Both stereo (3D) and shape-from-shading (PC) are both possible (and nearly all possible DEM combinations have now been constructed). Unlike Europa, only an handful of sites are mappable using both techniques: these being mostly over the South Polar region with Voyager 2. Without stereo control, PC topography, while very useful, must be interpreted with caution. Only a handful of targeted stereo mosaics were possible from Galileo, but serendipitous Voyager-Galileo stereo greatly expands this data set. Topographic data allow determinations of RMS slope values for each terrain type, but currently only at length scales >100 m. Topographic amplitude can also be determined. Geologic units for which we have limited DEM data include: furrows, grooves, smooth and subdued grooved terrains, calderas, pit and dome craters, penepalimpsests, and palimpsests. Key science questions that can be guided by even the limited available topography include: relative elevations of smooth, grooved and dark terrains and the role of volcanic vs. tectonic resurfacing; relief of ancient degraded impact craters and the role of density and heat variations; density anomalies within or beneath the ice shell; the severity and history of thermal relaxation globally and the associated heat pulse. Here we focus on the issue of relaxation, where topographic evidence indicates that thermal relaxation reached a peak associated with bright terrain formation, reducing topography of earlier craters, furrows and all other features equally, and then decayed quickly, leaving more recently formed features mostly intact. Regional variations in heat flux may be evident in the distribution of relaxed craters, especially at the South Pole. JF - American Geophysical Union Fall Meeting AU - Schenk, P AU - McKinnon, W B AU - Singer, K N AU - Moore, J M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P34C EP - 01 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/1765879752?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Current+state+of+topographic+mapping+of+Ganymede%3B+squeezing+the+most+from+JUICE&rft.au=Schenk%2C+P%3BMcKinnon%2C+W+B%3BSinger%2C+K+N%3BMoore%2C+J+M%3BAnonymous&rft.aulast=Schenk&rft.aufirst=P&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 - Spatially resolved chemical imaging for biosignature analysis; terrestrial and extraterrestrial examples AN - 1765879718; 2016-013878 AB - Detection of in situ biosignatures on terrestrial and planetary missions is becoming increasingly more important. Missions that target the Earth's deep biosphere, Mars, moons of Jupiter (including Europa), moons of Saturn (Titan and Enceladus), and small bodies such as asteroids or comets require methods that enable detection of materials for both in-situ analysis that preserve context and as a means to select high priority sample for return to Earth. In situ instrumentation for biosignature detection spans a wide range of analytical and spectroscopic methods that capitalize on amino acid distribution, chirality, lipid composition, isotopic fractionation, or textures that persist in the environment. Many of the existing analytical instruments are bulk analysis methods and while highly sensitive, these require sample acquisition and sample processing. However, by combining with triaging spectroscopic methods, biosignatures can be targeted on a surface and preserve spatial context (including mineralogy, textures, and organic distribution). To provide spatially correlated chemical analysis at multiple spatial scales (meters to microns) we have employed a dual spectroscopic approach that capitalizes on high sensitivity deep UV native fluorescence detection and high specificity deep UV Raman analysis. Recently selected as a payload on the Mars 2020 mission, SHERLOC incorporates these optical methods for potential biosignatures detection on Mars. We present data from both Earth analogs that operate as our only examples known biosignatures and meteorite samples that provide an example of abiotic organic formation, and demonstrate how provenance effects the spatial distribution and composition of organics. JF - American Geophysical Union Fall Meeting AU - Bhartia, R AU - Wanger, G AU - Orphan, V J AU - Fries, M AU - Rowe, A R AU - Nealson, K H AU - Abbey, W J AU - DeFlores, L P AU - Beegle, L W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21D EP - 3963 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/1765879718?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Spatially+resolved+chemical+imaging+for+biosignature+analysis%3B+terrestrial+and+extraterrestrial+examples&rft.au=Bhartia%2C+R%3BWanger%2C+G%3BOrphan%2C+V+J%3BFries%2C+M%3BRowe%2C+A+R%3BNealson%2C+K+H%3BAbbey%2C+W+J%3BDeFlores%2C+L+P%3BBeegle%2C+L+W%3BAnonymous&rft.aulast=Bhartia&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Analogue sites for Mars missions; a report from two workshops AN - 1765879645; 2016-013881 AB - Fieldwork, at terrestrial sites that are analogous in some way to Mars, has a key role in defining questions addressed by Mars missions. For MSL, the question is whether its landing site was habitable, and for Mars 2020, the question is how do we search for and what are signs of life in ancient habitable environments. Implementing these investigations by means of a rover mission on a distant planetary surface has challenges due to a limited set of tools and period of operations. Using this context of planetary missions is important in shaping how analog research can be used to advance planetary science. Following a successful 2010 AGU fall meeting session entitled Analogue sites for Mars missions, two community workshops were held at The Woodlands, TX March 2011 and the Carnegie Institute of Washington in July 2013. These activities represent an ongoing dialogue with the analog and mission communities. The AGU session solicited presentations of current analog research relevant to MSL, at which time the landing site selection process was still considering four final sites. The 2011 Woodlands workshop solicited details on representative science questions and analogue sites by means of an abstract template. The output from The Woodlands workshop was an initial metric to assess the utility of analog sites against specific science questions, as well as recommendations for future activities. The 2013 Carnegie workshop, followed up on some of the recommendations from 2011. Both on-line interactive dialogue and in person discussions targeted broad topics, including "the advantages and problems of using a great terrestrial analog for field testing", and "knowing what we currently do about Mars, what would be the best place on the planet to collect the first suite of samples to be returned to Earth? What would be appropriate analog sites on Earth?". The results and recommendations from both workshops are summarized to publicize and stimulate this ongoing discussion. JF - American Geophysical Union Fall Meeting AU - Hipkin, V AU - Voytek, M A AU - Glamoclija, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21D EP - 3966 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/1765879645?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Analogue+sites+for+Mars+missions%3B+a+report+from+two+workshops&rft.au=Hipkin%2C+V%3BVoytek%2C+M+A%3BGlamoclija%2C+M%3BAnonymous&rft.aulast=Hipkin&rft.aufirst=V&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Photometric correction for the thermal channels of the Diviner Lunar Radiometer Experiment AN - 1765879521; 2016-013826 AB - The Diviner Lunar Radiometer Experiment is a nine channel multispectral imager on the Lunar Reconnaissance Orbiter currently mapping the lunar surface. Three of its channels are dedicated to locating the Christiansen Feature (CF), the mid-infrared emissivity maximum near 8 mu m that is the primary indicator of surface composition as its location changes as a function of silicate polymerization. Four of its channels detect in the mid- to far-infrared (12.5-400 mu m) from which temperature and thermophysical properties are derived. The shorter wavelength thermal channels (esp. 12.5-25 mu m and 25-50 mu m) can also be used in the determination of surface composition as silicate minerals have strong absorption features in this region. We have found that the emissivity of these thermal channels varies as a function of solar incidence angle. This is problematic as high incidence angle measurements are necessary for obtaining spectra at high latitudes. A correction has been developed for Diviner's 8 mu m channels which normalizes all Diviner daytime data to 0 degrees incidence angles, but a correction for the thermal channels has yet to be created. Here, we describe our method for correcting the thermal channels as a function of incidence angle. We assume that emissivity measured at an incidence angle of 0 degrees are correct, and calculate the change in emissivity with increasing incidence angle as a percentage of the 0 degrees emissivity. We use these values to create a calibration function of incidence angle for each channel. Several lunar equatorial locations were used to create the calibration and locations at higher latitudes were included in testing its viability. This correction creates a global data set that is more consistent and comparable to laboratory data, and allows the thermal channels to be used to give more detailed insight into surface mineralogy by increasing the amount of compositionally useful channels from 3 to 5. This work will allow us to create more mineral spectral indices and lead to spectral unmixing models. Future improvements to our methodology include an expanded photometric database and constraints based on emission and phase angles. JF - American Geophysical Union Fall Meeting AU - Shirley, K AU - Glotch, T D AU - Greenhagen, B T AU - White, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13D EP - 3861 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/1765879521?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Photometric+correction+for+the+thermal+channels+of+the+Diviner+Lunar+Radiometer+Experiment&rft.au=Shirley%2C+K%3BGlotch%2C+T+D%3BGreenhagen%2C+B+T%3BWhite%2C+M%3BAnonymous&rft.aulast=Shirley&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 - Analysis and comparison of physical properties and morphology of impact melt flows on Venus and the Moon AN - 1765879114; 2016-013845 AB - The cratering process sometimes produces melt that flows out of and away from the impact crater. These impact melt flows have been studied in the past using remote sensing on both Venus and the Moon. The purpose of this study is use radar to compare the reflectivity, morphology, and roughness of impact melt flows on Venus and the Moon. For the Venus portion of the study, we used reflectivity data from the Magellan mission to examine flow reflectivity and morphology, and circular polarization ratio (CPR) data from the Arecibo Observatory to examine flow roughness. For the Moon portion of the study, we used Mini-RF (on Lunar Reconnaissance Orbiter) data to examine flow reflectivity, morphology, and CPR. Reflectivity values were averaged and morphology was recorded for a sample of 25 Venus craters, and CPR values were averaged for five of these craters that were in range of the Arecibo data and had large enough flows that were resolvable in the ground based polarimetry data. The CPR values of the five crater sample ranged from approximately -0.032 to approximately 0.287 over a range of incidence angles from 17.5 degrees to 61.8 degrees . The Venus impact melt flows are brighter and generally have higher CPR values than their surroundings, have both crisp and diffuse edges, and both reflectivity and CPR often vary along the length of the flow. The impact melt flows have similar CPR values to those measured for volcanic flows on Venus, indicating similar surface roughness. The Venus impact melt flows appear to be smoother than those on the Moon based on a comparison of CPR values at similar incidence angles. The Venus and lunar impact melt flows have different trends in crater diameter versus flow length relative to crater diameter, although smaller (<30 km diameter) craters on both objects have the longest flows relative to crater diameter. We will present a comparison of the results from Venus to those of impact melt flows on the Moon to investigate the effect that the presence of a thick, hot atmosphere has on impact melt emplacement process. JF - American Geophysical Union Fall Meeting AU - Dong, C AU - Carter, L M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21B EP - 3914 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/1765879114?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+and+comparison+of+physical+properties+and+morphology+of+impact+melt+flows+on+Venus+and+the+Moon&rft.au=Dong%2C+C%3BCarter%2C+L+M%3BAnonymous&rft.aulast=Dong&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - A new approach to characterizing landslide hazards with global crowd sourcing AN - 1765878987; 2016-014045 AB - Landslide disasters cause thousands of fatalities each year and cumulatively produce more economic damage than most other natural disasters. However, the number and distribution of landslides remain poorly quantified due to their small size and the absence of local, regional or global observing or reporting mechanisms. As a result, there are very few global databases that describe landslide hazards. Characterizing the socioeconomic impacts of landslide hazards worldwide presents an even more challenging task due to the various reporting biases or information gaps in existing regional and global sources. An online system has been developed to improve reporting of landslide hazards at the global scale that leverages crowd sourcing capabilities. Through this portal, users are able to input landslide information in a series of specified fields, including the date, location, impacts, trigger, and setting of the event. They are also able to link to photos so that other users can improve the characterization of the landslide event based on additional information or expert opinion. This hazard portal and editor provides a foundation to involve citizens in reporting, visualizing and sharing landslide events while improving a global landslide database and introducing them to other geospatial data in the process. A global landslide catalog of over 6,000 events developed at NASA Goddard Space Flight Center currently anchors this system. This research presents this new crowd-based system and outlines the technology used in developing this system. Preliminary findings of societal metrics, limitations on this type of interactive crowd sourcing portal, and lessons learned from the initial launch of this system will also be presented. JF - American Geophysical Union Fall Meeting AU - Bach Kirschbaum, D AU - Cappelaere, P G AU - Stanley, T AU - Hall, B AU - Franchek, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PA33A EP - 07 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765878987?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+new+approach+to+characterizing+landslide+hazards+with+global+crowd+sourcing&rft.au=Bach+Kirschbaum%2C+D%3BCappelaere%2C+P+G%3BStanley%2C+T%3BHall%2C+B%3BFranchek%2C+M%3BAnonymous&rft.aulast=Bach+Kirschbaum&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 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 - Aqueous alteration of Endeavour crater rim apron rocks AN - 1765878925; 2016-013918 AB - Mars Exploration Rover Opportunity is exploring Noachian age rocks of the rim of 22 km diameter Endeavour crater. Overlying the pre-impact lithologies and rim breccias is a thin apron of fine-grained sediments, the Grasberg fm, forming annuli on the lower slopes of rim segments. Hesperian Burns fm sandstones overly the Grasberg fm. Grasberg rocks have major element compositions that are distinct from Burns fm sandstones, especially when comparing interior compositions exposed by the Rock Abrasion Tool. Grasberg rocks are also different from Endeavour rim breccias, but have general compositional similarities to them. Grasberg sediments are plausibly fine-grained materials derived from the impact breccias. Veins of CaSO (sub 4) transect Grasberg fm rocks demonstrating post-formation aqueous alteration. Minor/trace elements show variations consistent with mobilization by aqueous fluids. Grasberg fm rocks have low Mn and high Fe/Mn ratios compared to the other lithologies. Manganese likely was mobilized and removed from the Grasberg host rock by redox reactions. We posit that Fe (super 2+) from acidic solutions associated with formation of the Burns sulfate-rich sandstones acted as an electron donor to reduce more oxidized Mn to Mn (super 2+) . The Fe contents of Grasberg rocks are slightly higher than in other rocks suggesting precipitation of Fe phases in Grasberg materials. Pancam spectra show that Grasberg rocks have a higher fraction of ferric oxide minerals than other Endeavour rim rocks. Solutions transported Mn (super 2+) into the Endeavour rim materials and oxidized and/or precipitated it in them. Grasberg has higher contents of the mobile elements K, Zn, Cl, and Br compared to the rim materials. Similar enrichments of mobile elements were measured by the Spirit APXS on West Spur and around Home Plate in Gusev crater. Enhancements in these elements are attributed to interactions of hydrothermal acidic fluids with the host rocks. Interactions of fluids with the Grasberg fm postdate the genesis of the Endeavour rim phyllosilicates. The aqueous alteration history of Endeavour rim rocks is complicated by different styles of alteration that have spanned the Noachian and Hesperian. Late stage acidic aqueous alteration of Grasberg fm materials is likely penecontemporaneous with the diagenesis of the sulfate-rich sediments of Meridiani Planum. JF - American Geophysical Union Fall Meeting AU - Ming, Douglas W AU - Mittlefehldt, David W AU - Gellert, R AU - Clark, Ben C AU - Morris, Richard V AU - Yen, Albert S AU - Arvidson, R E AU - Crumpler, Larry S AU - Farrand, William H AU - Grant, J A, III AU - Jolliff, B L AU - Parker, Timothy J AU - Peretyazhko, T AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P41A EP - 3881 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/1765878925?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Aqueous+alteration+of+Endeavour+crater+rim+apron+rocks&rft.au=Ming%2C+Douglas+W%3BMittlefehldt%2C+David+W%3BGellert%2C+R%3BClark%2C+Ben+C%3BMorris%2C+Richard+V%3BYen%2C+Albert+S%3BArvidson%2C+R+E%3BCrumpler%2C+Larry+S%3BFarrand%2C+William+H%3BGrant%2C+J+A%2C+III%3BJolliff%2C+B+L%3BParker%2C+Timothy+J%3BPeretyazhko%2C+T%3BAnonymous&rft.aulast=Ming&rft.aufirst=Douglas&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 - Cross calibration of omnidirectional orbital neutron detectors of lunar PROSPECTOR (LP) and Lunar Exploration Neutron Detector (LEND) by Monte Carlo simulations AN - 1765878876; 2016-013972 AB - Introduction: Monte Carlo (MC) simulations have been used to investigate neutron production and leakage from the lunar surface to assess the composition of the lunar soil [1-3]. Orbital measurements of lunar neutron flux have been made by the Lunar Prospector Neutron Spectrometer (LPNS) [4] of the Lunar Prospector mission and the Lunar Exploration Neutron Detector (LEND) [5] of the Lunar Reconnaissance Orbiter mission. While both are cylindrical helium-3 detectors, LEND's SETN (Sensor EpiThermal Neutrons) instrument is shorter, with double the helium-3 pressure than that of LPNS. The two instruments therefore have different angular sensitivities and neutron detection efficiencies. Furthermore, the Lunar Prospector's spin-stabilized design makes its detection efficiency latitude-dependent, while the SETN instrument permanently faces downward toward the lunar surface. We use the GEANT4 Monte Carlo simulation code [6] to investigate the leakage lunar neutron energy spectrum, which follows a power law of the form E (super -0.9) in the epithermal energy range, and the signals detected by LPNS and SETN in the LP and LRO mission epochs correspondingly. Using the lunar neutron flux reconstructed for LPNS epoch we calculate what would have been the SETN signal at that time. The difference with actual signal of LEND epoch is due to significantly higher intensity of Galactic Cosmic Rays during anomalous Solar Minimum of 2009-2010. Reference: [1] W. C. Feldman, et al., (1998) Science Vol. 281 no. 5382 pp. 1496-1500. [2] Gasnault, O., et al., (2000) J. Geophys. Res., 105(E2), 4263-4271. [3] Little, R. C., et al. (2003), J. Geophys. Res., 108(E5), 5046. [4] W. C. Feldman, et al., (1999) Nucl. Inst. And Method in Phys. Res. A 422, [5] M. L. Litvak, et al., (2012) J. Geophys. Res. 117, E00H32 [6] J. Allison, et al, (2006) IEEE Trans. on Nucl Sci, Vol 53, No 1. JF - American Geophysical Union Fall Meeting AU - Murray, J AU - Su, J J AU - Sagdeev, R AU - Chin, Gordon AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51C EP - 3963 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/1765878876?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Cross+calibration+of+omnidirectional+orbital+neutron+detectors+of+lunar+PROSPECTOR+%28LP%29+and+Lunar+Exploration+Neutron+Detector+%28LEND%29+by+Monte+Carlo+simulations&rft.au=Murray%2C+J%3BSu%2C+J+J%3BSagdeev%2C+R%3BChin%2C+Gordon%3BAnonymous&rft.aulast=Murray&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 - Number of references - 6 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Phosphates at the surface of Mars; primary deposits and alteration products AN - 1765878857; 2016-013899 AB - Phosphorus is an essential element in terrestrial organisms and thus characterizing the occurrences of phosphate phases at the martian surface is crucial in the assessment of habitability. The Alpha Particle X-Ray Spectrometers onboard Spirit, Opportunity and Curiosity discovered a variety of primary and secondary phosphate phases allowing direct comparisons across the three landing sites. The Spirit rover at Gusev Crater encountered the "Wishstone/Watchtower" class of P-rich (up to 5.2 wt% P2O5) rocks interpreted to be alkaline volcanic rocks with a physical admixture of nearly equal 10 to 20% merrillite [Usui et al. 2008]. These rocks are characterized by elevated Ti and Y and anomalously low Cr and Ni, which could largely reflect the nature of the protoliths: Evolved magmatic rocks. Many of these chemical signatures are also found in pyroclastic deposits at nearby "Home Plate" and in phosphate precipitates derived from fluid interactions with these rocks ("Paso Robles" soils). The Opportunity rover at Meridiani Planum recently analyzed a nearly equal 4 cm clast in a fine-grained matrix, one of numerous rocks of similar appearance at the rim of Endeavour Crater. This clast, "Sarcobatus," has minor enrichments in Ca and P relative to the matrix, and like the P-rich rocks at Gusev, Sarcobatus also shows elevated Al and Ti. On the same segment of the Endeavour rim, subsurface samples were found with exceptional levels of Mn ( nearly equal 3.5 wt% MnO). These secondary and likely aqueous deposits contain strong evidence for associated Mg-sulfate and Ca-phosphate phases. Finally, the Curiosity traverse at Gale crater encountered P-rich rocks compositionally comparable to Wishstone at Gusev, including elevated Y. Phosphorous-rich rocks with similar chemical characteristics are prevalent on Mars, and the trace and minor element signatures provide constraints on whether these are primary deposits, secondary products of physical weathering, or secondary products of chemical weathering. JF - American Geophysical Union Fall Meeting AU - Yen, A S AU - Gellert, R AU - Clark, B C AU - Ming, Douglas W AU - Mittlefehldt, David W AU - Arvidson, R E AU - McSween, H Y, Jr AU - Schroeder, Christian AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P34A EP - 04 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/1765878857?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Phosphates+at+the+surface+of+Mars%3B+primary+deposits+and+alteration+products&rft.au=Yen%2C+A+S%3BGellert%2C+R%3BClark%2C+B+C%3BMing%2C+Douglas+W%3BMittlefehldt%2C+David+W%3BArvidson%2C+R+E%3BMcSween%2C+H+Y%2C+Jr%3BSchroeder%2C+Christian%3BAnonymous&rft.aulast=Yen&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 - Plains style caldera complexes; evidence for ancient, explosive volcanism on Mars AN - 1765878718; 2016-013888 AB - One of the mysteries of Mars' geology is the origin of widespread, layered, friable deposits that likely formed through air fall deposition. The enigmatic chaos terrains are largely composed of such deposits, as are many of the most intriguing layered, clay- and sulfate-bearing deposits of astrobiological interest. Such deposits are most likely of volcanic origin, but lack an obvious source, based on comparison with well-known volcanic provinces [1]. We suggest that these deposits may have been sourced from previously unrecognized explosive volcanoes in Arabia Terra. While Arabia is not traditionally considered to be a volcanic region, we propose that several of the large depressions in the area are in fact calderas that formed through a combination of structural collapse and explosive volcanism. These features are characterized by the observation of sets of nested depressions, association with ridged plains, development of ring fractures and faults, the presence of interior slump blocks, and direct association, in some cases, with friable deposits, lavas and evidence for lava lakes. Eden Patera is the type example and shows evidence for three nested calderas with >4000 km (super 3) of collapse volume. Siloe Patera also contains a set of nested collapse features that occur within a zone of demagnetized crust that might indicate the presence of a magma chamber at shallow depth [2]. It is not yet clear why explosive volcanoes may have formed in Arabia Terra, but we suggest that they might represent the rapid rise of mafic magmas through a thin crust. They might represent more silicic or volatile-rich magmas, but these scenarios do not appear to be necessary [3]. We suggest that explosive mafic volcanism was an important aspect of early Martian geological processes. [1] Kerber, L., Head III, J., Madeleine, J. B., Forget, F. & Wilson, L. The dispersal of pyroclasts from ancient explosive volcanoes on Mars: Implications for the friable layered deposits. Icarus 219, 358-381 (2012) [2] Morschhauser, A., V. Lesur and M. Grott. A spherical harmonic model of the lithospheric magnetic field of Mars. JGR Planets. 199 (6), 1162-1188 (2014). [3] Gregg, T. K. P. and S. N. Williams. Explosive mafic volcanoes on Mars and Earth: Deep magma sources and rapid rise rate. Icarus 122 (2), 397-405. JF - American Geophysical Union Fall Meeting AU - Michalski, J R AU - Bleacher, J E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P33E EP - 03 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/1765878718?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Plains+style+caldera+complexes%3B+evidence+for+ancient%2C+explosive+volcanism+on+Mars&rft.au=Michalski%2C+J+R%3BBleacher%2C+J+E%3BAnonymous&rft.aulast=Michalski&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 - Number of references - 3 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Composition of Rheasilvia basin on asteroid Vesta AN - 1765878696; 2016-013983 AB - The focus of the present study is the compositional analysis of small-scale surface features within the Rheasilvia basin on asteroid Vesta. We are using data acquired by the Visible and InfraRed mapping Spectrometer (VIR) on the Dawn mission. Nominal spatial resolution of the data set considered in this study is 70m/px. The portion of Rheasilvia basin below 65 degrees S has a howarditic composition, with the higher concentration of diogenitic versus eucritic material in the region between 45 degrees and 225 degrees E-lon. However, there are several locations, such as craters Tarpeia and Severina and Parentatio Rupes, with lithologic characteristics different from the surroundings regions. Tarpeia crater has a eucritic patch in the west side of the crater, the bottom part of the wall and part of the floor. Severina, located in a region of Mg-rich pyroxene, has some diogenitic units on the walls of the crater. Also the Parentatio Rupes has an obvious diogenitic unit. These units extend for 10-20 km, and their location, especially in the case of the two craters, suggests they formed before the cratering events and also before the Rheasilvia impact event. The origin of these units is still unclear; however, their characteristics and locations suggests heterogeneity in the composition of the ancient Vestan crust in this particular location of the surface. Acknowledgements: The authors gratefully acknowledge the contribution of the Dawn Instruments and Operations Teams. This work is supported by NASA through the Dawn project and by an Italian Space Agency grant. The VIR spectrometer is funded by ASI. It was built by Selex-Galileo, Florence, Italy and is now managed by INAF - Istituto di Astrofisica e Planetologia Spaziali, Rome, Italy. JF - American Geophysical Union Fall Meeting AU - Ammannito, Eleonora AU - De Sanctis, Maria Cristina AU - Capaccioni, Fabrizio AU - Capria, Maria Teresa AU - Combe, Jean Philippe AU - Frigeri, Alessandro AU - Jaumann, Ralf AU - Longobardo, Andrea AU - Marchi, S AU - McCord, T B AU - McSween, H Y, Jr AU - Mittlefehldt, David W AU - Stephan, Katrin AU - Tosi, Federico AU - Raymond, Carol A AU - Russell, C T AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43F EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765878696?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Composition+of+Rheasilvia+basin+on+asteroid+Vesta&rft.au=Ammannito%2C+Eleonora%3BDe+Sanctis%2C+Maria+Cristina%3BCapaccioni%2C+Fabrizio%3BCapria%2C+Maria+Teresa%3BCombe%2C+Jean+Philippe%3BFrigeri%2C+Alessandro%3BJaumann%2C+Ralf%3BLongobardo%2C+Andrea%3BMarchi%2C+S%3BMcCord%2C+T+B%3BMcSween%2C+H+Y%2C+Jr%3BMittlefehldt%2C+David+W%3BStephan%2C+Katrin%3BTosi%2C+Federico%3BRaymond%2C+Carol+A%3BRussell%2C+C+T%3BAnonymous&rft.aulast=Ammannito&rft.aufirst=Eleonora&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 - A map of kilometer-scale topographic roughness of Mercury AN - 1765878648; 2016-013856 AB - We present a new map of the multiscale topographic roughness of the northern circumpolar area of Mercury. The map utilizes high internal vertical precision surface ranging by the laser altimeter MLA onboard MESSENGER mission to Mercury. This map is analogous to global roughness maps that had been created by M.A.K. with collaborators for Mars (MOLA data) and the Moon (LOLA data). As measures of roughness, we used the interquartile range of along-track profile curvature at three baselines: 0.7 km, 2.8 km, and 11 km. Unlike in the cases of LOLA data for the Moon, and MOLA data for Mars, the MLA data allow high-quality roughness mapping only for a small part of the surface of the planet: the map covers 65N-84N latitude zone, where the density of MLA data is the highest. The map captures the regional variations of the typical background topographic texture of the surface. The map shows the clear dichotomy between smooth northern plains and rougher cratered terrains. The lowered contrast of this dichotomy at the shortest (0.7 km) baseline indicates that regolith on Mercury is thicker and/or gardening processes are more intensive in comparison to the Moon, approximately by a factor of three. The map reveals sharp roughness contrasts within northern plains of Mercury that we interpret as geologic boundaries of volcanic plains of different age. In particular, the map suggests a younger volcanic plains unit inside Goethe basin and inside another unnamed stealth basin. Acknowledgement: Work on data processing was carried out at MIIGAiK by MAK, AAK, NAK and supported by Russian Science Foundation project 14-22-00197. JF - American Geophysical Union Fall Meeting AU - Kreslavsky, M A AU - Head, J W, III AU - Kokhanov, A A AU - Neumann, Gregory A AU - Smith, D E AU - Zuber, M T AU - Kozlova, N A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P21C EP - 3936 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/1765878648?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+map+of+kilometer-scale+topographic+roughness+of+Mercury&rft.au=Kreslavsky%2C+M+A%3BHead%2C+J+W%2C+III%3BKokhanov%2C+A+A%3BNeumann%2C+Gregory+A%3BSmith%2C+D+E%3BZuber%2C+M+T%3BKozlova%2C+N+A%3BAnonymous&rft.aulast=Kreslavsky&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - In situ analysis of Mars soil and rocks sample with the SAM GCMS instrumentation onboard Curiosity; interpretation and comparison of measurements done during the first Martian year of Curiosity on Mars AN - 1765878615; 2016-013960 AB - The characterisation of the chemical and mineralogical composition of solid surface samples collected with the Curiosity rover is a primary objective of the SAM experiment. These data should provide essential clues on the past habitability of Gale crater. Amongst the SAM suite of instruments [1], SAM-GC (Gas Chromatograph) is devoted to identify and quantify volatiles evolved from the thermal (heating up to about 900 degrees C)/chemical (derivatization procedure) treatment of any soil sample collected by the Curiosity rover. With the aim to search for potential organic molecules outgassed from the samples, SAM-GC analytical channels composed of thermal-desorption injector, and a MXT-CLP or a MXT-Q chromatographic column was chosen to achieve all the measurements done up today, with the aim to separate of a wide range of volatile inorganic and organic molecules. Four solid samples have been analyzed with GCMS, one sand sample collected at the Rocknest site, two rock samples (John Klein and Cumberland respectively) collected at the Yellowknife Bay site using the Curiosity driller, and one rock sample collected at the Kimberly site. All the measurements were successful and they produced complex chromatograms with both detectors used for SAM GC, i.e. a thermal conductivity detector and the SAM quandrupole mass spectrometer. Their interpretation already revealed the presence of an oxychlorine phase present in the sample which is at the origin of chlorohydrocarbons clearly identified [2] but this represents only a fraction of the GCMS signal recorded [3,4]. This work presents a systematic comparison of the GCMS measurements done for the different samples collected, supported by reference data obtained in laboratory with different spare models of the gas chromatograph, with the aim to bring new elements of interpretation of the SAM measurements. References: [1] Mahaffy, P. et al. (2012) Space Sci Rev, 170, 401-478. [2] Glavin, D. et al. (2013), JGR. [3] Leshin L. et al. (2013), Science, [4] Ming D. et al. (2013), Science, 32, 64-67. Acknowledgements: SAM-GC team acknowledges support from the French Space Agency (CNES), French National Programme of Planetology (PNP), National French Council (CNRS), Pierre Simon Laplace Institute, Institut Universitaire de France (IUF) and ESEP Labex, and the great MSL team. JF - American Geophysical Union Fall Meeting AU - Szopa, Cyril AU - Coll, P J AU - Cabane, Michel AU - Buch, Arnaud AU - Coscia, David AU - Millan, Maeva AU - Francois, Pascaline AU - Belmahdi, Imene AU - Teinturier, Samuel AU - Navarro-Gonzalez, R AU - Glavin, Daniel P AU - Freissinet, Caroline AU - Steele, A AU - Eigenbrode, J L AU - Mahaffy, Paul R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43D EP - 4008 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/1765878615?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+analysis+of+Mars+soil+and+rocks+sample+with+the+SAM+GCMS+instrumentation+onboard+Curiosity%3B+interpretation+and+comparison+of+measurements+done+during+the+first+Martian+year+of+Curiosity+on+Mars&rft.au=Szopa%2C+Cyril%3BColl%2C+P+J%3BCabane%2C+Michel%3BBuch%2C+Arnaud%3BCoscia%2C+David%3BMillan%2C+Maeva%3BFrancois%2C+Pascaline%3BBelmahdi%2C+Imene%3BTeinturier%2C+Samuel%3BNavarro-Gonzalez%2C+R%3BGlavin%2C+Daniel+P%3BFreissinet%2C+Caroline%3BSteele%2C+A%3BEigenbrode%2C+J+L%3BMahaffy%2C+Paul+R%3BAnonymous&rft.aulast=Szopa&rft.aufirst=Cyril&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 - Number of references - 4 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - The anomalous drift of comet ISON (C/2012 S1) due to sublimating volatiles near perihelion AN - 1765878543; 2016-013957 AB - Prior to perihelion passage on 28 November 2013, the observed right ascension (RA) and declination (Dec) coordinates of comet C/2012 S1 (ISON) significantly lagged the predicted JPL (# 53) ephemeris. We show that this "braking effect" is due to a dynamic pressure exerted by sublimating gases on the sunward side of the nucleus [1]. Comet ISON was observed November 23 through November 28 using the SCUBA-2 sub-millimeter camera on the James Clerk Maxwell Telescope (JCMT). Imaging is achieved simultaneously at wavelengths of 850 mu m and 450 mu m, with RA and Dec determined from the central peak in the coma brightness [2]. When comet ISON was first detected at 850 mu m, the 1-mm-sized dust particles were tightly bound to the comet nucleus until at least November 23. Three days later, the dust was less tightly bound, elongated and diffuse, spread out over as much as 120 arc seconds (80,000 km) in the anti-solar direction, suggesting a fragmentation event. We compute the average braking velocity of the nucleus of comet ISON by first measuring the distance between the central RA position and the predicted JPL ephemeris. We then calculate the change in this distance between subsequent observations, and divide this value by the elapsed time between the two observations to yield an average drift velocity of the nucleus over this time interval. We assume that comet ISON, like a number of Jupiter Family Comets visited by spacecraft [3], has low thermal inertia. Thus, the sublimating gases are emitted predominantly on the sunward side of the nucleus. Additionally, we assume that water ice dominates the sublimating gases [4]. We then calculate the pressure on the surface of the nucleus due to the emitted gases using the procedure described in [1]. We match the average drift velocity of the nucleus due to this sublimation pressure with the observed average drift velocity from the JCMT observations, which is sensitive to the size of the body, allowing us to estimate the size of the nucleus (or its fragments) shortly before perihelion. References: [1] Steckloff et al. (2014) Submitted Nature [2] Keane et al. (2014) Submitted Ap. J. [3] Groussin et al. (2013) Icarus 222, 580-594 [4] Combi et al. (2014) Ap. J. 788:L7 (5pp). JF - American Geophysical Union Fall Meeting AU - Steckloff, J K AU - Keane, J V AU - Milam, Stefanie AU - Coulson, I AU - Knight, M M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43C EP - 4005 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/1765878543?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+anomalous+drift+of+comet+ISON+%28C%2F2012+S1%29+due+to+sublimating+volatiles+near+perihelion&rft.au=Steckloff%2C+J+K%3BKeane%2C+J+V%3BMilam%2C+Stefanie%3BCoulson%2C+I%3BKnight%2C+M+M%3BAnonymous&rft.aulast=Steckloff&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 - Number of references - 4 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Manganese in Endeavour crater rim materials, Mars, and implications for habitability AN - 1765878520; 2016-013903 AB - The Opportunity Mars rover wheels overturned two adjacent rocks and exposed underlying fracture-filling deposits while exploring the Murray Ridge rim segment of the Noachian-aged Endeavour Crater. These two small rocks, Pinnacle Island ( nearly equal 4 cm across) and Stuart Island (ranging from nearly equal 3 to 8 cm wide and nearly equal 10 cm long), were subsequently examined in detail to determine the textures, spectral reflectances (0.4 to 1.0 mu m), and compositions of the fracture-filling materials. Relatively bright materials with a composition enriched in Mg, Fe, and S, and spectral features indicative of hydrated sulfates, are overlain with a dark, purple mineral phase or phases with a composition enriched in Mn, Ni, P, and Ca, all relative to underlying bedrock. Reflectance spectra for the dark, purple material are consistent with the presence of one or more Mn-oxide phases. Results indicate two aqueous events, one to deposit the Fe and Mg-rich sulfates, and one to deposit the Mn-rich mineral(s), perhaps with scavenging of Ni from the fluid. Ca and P-rich phases (e.g., Ca-phosphates) co-precipitated with Mn-bearing mineral(s) or were incorporated into one or more of them. Mixing of reducing ground waters with an oxidizing atmosphere or other waters likely produced both the S and Mn-enriched deposits. Oxidation of Mn, in particular, requires a very high potential oxidant relative to what is required for S or Fe oxidation. This suggests oxidation by O (sub 2) or species derived from O (sub 2) . Mn-oxide phases would have provided highly favorable substrates for microbial respiration, making this period of aqueous flow through the fractures a potentially habitable environment. These results add to the evolving story of aqueous alteration of Endeavour's rim rocks, including evidence for nontronite, montmorillonite, Ca-sulfate-rich veins, and hematitic concretions. JF - American Geophysical Union Fall Meeting AU - Arvidson, R E AU - Catalano, J G AU - Clark, Ben C AU - Fischer, W W AU - Grotzinger, J P AU - Gellert, R AU - Guinness, E A AU - Herkenhoff, Kenneth E AU - Johnson, Jeffrey R AU - McLennan, Scott M AU - Ming, Douglas W AU - Morris, Richard V AU - Squyres, S W AU - Yen, Albert S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P34A 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/1765878520?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Manganese+in+Endeavour+crater+rim+materials%2C+Mars%2C+and+implications+for+habitability&rft.au=Arvidson%2C+R+E%3BCatalano%2C+J+G%3BClark%2C+Ben+C%3BFischer%2C+W+W%3BGrotzinger%2C+J+P%3BGellert%2C+R%3BGuinness%2C+E+A%3BHerkenhoff%2C+Kenneth+E%3BJohnson%2C+Jeffrey+R%3BMcLennan%2C+Scott+M%3BMing%2C+Douglas+W%3BMorris%2C+Richard+V%3BSquyres%2C+S+W%3BYen%2C+Albert+S%3BAnonymous&rft.aulast=Arvidson&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - NASA's astromaterials curation digital repository; enabling research through increased access to sample data, metadata and imagery AN - 1765878281; 2016-011886 AB - The Astromaterials Acquisition & Curation Office at NASA's Johnson Space Center (JSC) is the designated facility for curating all of NASA's extraterrestrial samples. Today, the suite of collections includes the lunar samples from the Apollo missions, cosmic dust particles falling into the Earth's atmosphere, meteorites collected in Antarctica, comet and interstellar dust particles from the Stardust mission, asteroid particles from Japan's Hayabusa mission, solar wind atoms collected during the Genesis mission, and space-exposed hardware from several missions. To support planetary science research on these samples, JSC's Astromaterials Curation Office hosts NASA's Astromaterials Curation digital repository and data access portal [http://curator.jsc.nasa.gov/], providing descriptions of the missions and collections, and critical information about each individual sample. Our office is designing and implementing several informatics initiatives to better serve the planetary research community. First, we are re-hosting the basic database framework by consolidating legacy databases for individual collections and providing a uniform access point for information (descriptions, imagery, classification) on all of our samples. Second, we continue to upgrade and host digital compendia that summarize and highlight published findings on the samples (e.g., lunar samples, meteorites from Mars). We host high resolution imagery of samples as it becomes available, including newly scanned images of historical prints from the Apollo missions. Finally we are creating plans to collect and provide new data, including 3D imagery, point cloud data, micro CT data, and external links to other data sets on selected samples. Together, these individual efforts will provide unprecedented digital access to NASA's Astromaterials, enabling preservation of the samples through more specific and targeted requests, and supporting new planetary science research and collaborations on the samples. JF - American Geophysical Union Fall Meeting AU - Evans, C A AU - Todd, N S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract IN23A EP - 3725 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765878281?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=NASA%27s+astromaterials+curation+digital+repository%3B+enabling+research+through+increased+access+to+sample+data%2C+metadata+and+imagery&rft.au=Dinnat%2C+Emmanuel%3BBoutin%2C+Jacqueline%3BLe+Vine%2C+David%3BYin%2C+Xiaobin&rft.aulast=Dinnat&rft.aufirst=Emmanuel&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/ 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 - Smarter instruments, smarter archives; machine learning for tactical science AN - 1765878267; 2016-011959 AB - There has been a growing interest by Earth and Planetary Sciences in machine learning, visualization and cyberinfrastructure to interpret ever-increasing volumes of instrument data. Such tools are commonly used to analyze archival datasets, but they can also play a valuable real-time role during missions. Here we discuss ways that machine learning can benefit tactical science decisions during Earth and Planetary Exploration. Machine learning's potential begins at the instrument itself. Smart instruments endowed with pattern recognition can immediately recognize science features of interest. This allows robotic explorers to optimize their limited communications bandwidth, triaging science products and prioritizing the most relevant data. Smart instruments can also target their data collection on the fly, using principles of experimental design to reduce redundancy and generally improve sampling efficiency for time-limited operations. Moreover, smart instruments can respond immediately to transient or unexpected phenomena. Examples include detections of cometary plumes, terrestrial floods, or volcanism. We show recent examples of smart instruments from 2014 tests including: aircraft and spacecraft remote sensing instruments that recognize cloud contamination, field tests of a "smart camera" for robotic surface geology, and adaptive data collection by X-Ray fluorescence spectrometers. Machine learning can also assist human operators when tactical decision making is required. Terrestrial scenarios include airborne remote sensing, where the decision to re-fly a transect must be made immediately. Planetary scenarios include deep space encounters or planetary surface exploration, where the number of command cycles is limited and operators make rapid daily decisions about where next to collect measurements. Visualization and modeling can reveal trends, clusters, and outliers in new data. This can help operators recognize instrument artifacts or spot anomalies in real time. We show recent examples from science data pipelines deployed onboard aircraft as well as tactical visualizations for non-image instrument data. JF - American Geophysical Union Fall Meeting AU - Thompson, D R AU - Kiran, R AU - Allwood, A AU - Altinok, A AU - Estlin, T AU - Flannery, D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract IN51B EP - 3775 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765878267?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Smarter+instruments%2C+smarter+archives%3B+machine+learning+for+tactical+science&rft.au=Thompson%2C+D+R%3BKiran%2C+R%3BAllwood%2C+A%3BAltinok%2C+A%3BEstlin%2C+T%3BFlannery%2C+D%3BAnonymous&rft.aulast=Thompson&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 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 - Search for radio emission from HD80606b; a highly eccentric exoplanet AN - 1765877763; 2016-011583 AB - Exoplanetary radio emission is a potential goldmine of information about a wider sample of planetary interiors, dynamos, and magnetospheres than our solar system provides. To date, however, radio searches for exoplanetary radio emission have been unsuccessful likely because the observing frequencies are too high. Using the relatively new Low Frequency Array (LOFAR), we present analyses of observations of the highly eccentric Jovian exoplanet HD80606b during five epochs before and after the planet's periastron. All of the gas giants in the solar system, as well as the Earth, exhibit magnetospheric radio emission due to the electron cyclotron maser instability. The power of this emission is modulated by the solar wind intensity. HD80606b is in a highly eccentric (e=0.93) orbit with a 111 day period. As the planet passes from apastron (0.88 AU) to periastron (0.03 AU), it experiences widely varying stellar wind conditions which should lead to variable radio emission with the highest power corresponding to periastron passage. HD80606b has been observed previously with the VLA at 325 MHz and 1425 MHz by Lazio et. al (2010), but LOFAR's lower frequency range (30-75 MHz) and high sensitivity is better suited to jovian-type radio emissions. The LOFAR observations were made 48 hours and 18 hours pre-periastron, plus 18 and 48 hours post-periastron to capture the predicted strongest emission, and near apastron to provide a baseline level. The data are analyzed for both time-dependent and frequency dependent emission at each of the five observation epochs. This work presents the ongoing analysis of the data. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. JF - American Geophysical Union Fall Meeting AU - Knapp, M AU - Winterhalter, D AU - Lazio, J AU - Majid, W AU - Kuiper, T AU - Farrell, W M AU - Spitler, L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GP51B EP - 3745 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/1765877763?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Search+for+radio+emission+from+HD80606b%3B+a+highly+eccentric+exoplanet&rft.au=Knapp%2C+M%3BWinterhalter%2C+D%3BLazio%2C+J%3BMajid%2C+W%3BKuiper%2C+T%3BFarrell%2C+W+M%3BSpitler%2C+L%3BAnonymous&rft.aulast=Knapp&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Activation of fault structures South of the La Habra earthquake rupture as evidenced by UAVSAR imaging AN - 1765877242; 2016-012204 AB - The 28 March, 2014 M 5.2 La Habra earthquake occurred on a northeast striking, northwest dipping left-lateral oblique thrust fault at the northeastern margin of the LA Basin, where regional right-lateral shear is accommodated by major northwest trending faults of the Peninsular Ranges, and north-south shortening is accommodated by north-dipping thrust faults and east-west trending folds of the Transverse Ranges. The La Habra mainshock location and focal mechanism is northwest of but sub-parallel to the Puente Hills thrust fault. Relocated seismicity highlights a northeast-trending rupture plane consistent with the magnitude and focal mechanism of the event. NASA's UAVSAR L-Band radar instrument was flown for north and south looking lines before the earthquake on 22 January 2014. The north looking line was reflown three days after the earthquake on 31 March, 2014, and the south looking line was reflown a week later on 4 April 2014. The UAVSAR Repeat Pass Interferogram (RPI) products show deformation consistent with the location of the mainshock beneath the town of La Habra. The results also show considerable aseismic northward horizontal deformation with minor uplift in the West Coyote Hills, south of the relocated seismicity. Inversion of the combined interferograms is consistent with south dipping low-angle (7 degrees ) shallow slip that corresponds to bedding plane attitudes and a mapped unconformity. The entire West Coyote Hills show 37 mm of modeled northward slip with an additional 34 mm of modeled slip concentrated near the Coyote Hills Park northeast of the intersection of Rosecrans Avenue and North Gilbert Street. A narrow band of shortening was also observed with UAVSAR, and confirmed with on-the-ground field observations, at the Trojan Way Kink Band, nearly one fault dimension southwest of the main rupture. JF - American Geophysical Union Fall Meeting AU - Donnellan, Andrea AU - Parker, Jay W AU - Grant Ludwig, L AU - Hauksson, E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S21B EP - 4435 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765877242?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Activation+of+fault+structures+South+of+the+La+Habra+earthquake+rupture+as+evidenced+by+UAVSAR+imaging&rft.au=Donnellan%2C+Andrea%3BParker%2C+Jay+W%3BGrant+Ludwig%2C+L%3BHauksson%2C+E%3BAnonymous&rft.aulast=Donnellan&rft.aufirst=Andrea&rft.date=2014-12-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+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 - King's Bowl pit crater, lava field and eruptive fissure, Idaho; a multipurpose volcanic planetary analog AN - 1765877194; 2016-012094 AB - King's Bowl (KB) and its associated eruptive fissure and lava field on the eastern Snake River plain, is being investigated by the NASA SSERVI FINESSE (Field Investigations to Enable Solar System Science and Exploration) team as a planetary analog to similar pits on the Moon, Mars and Vesta. The 2,220 + or - 100 BP basaltic eruption in Craters of the Moon National Monument and Preserve represents early stages of low shield growth, which was aborted when magma supply was cut off. Compared to mature shields, KB is miniscule, with approximately 0.02 km3 of lava over approximately 3 km2, yet the approximately 6 km long series of fissures, cracks and pits are well-preserved for analog studies of volcanic processes. The termination of eruption was likely related to proximity of the 2,270 + or - 50 BP eruption of the much larger Wapi lava field ( approximately 5.5 km3 over 325 km2 area) on the same rift. Our investigation extends early work by R. Greeley and colleagues, focusing on imagery, compositional variations, ejecta distribution, dGPS profiles and LiDAR scans of features related to: (1) fissure eruptions; spatter ramparts, cones, feeder dikes, extension cracks; (2) lava lake formation; surface morphology, squeeze-ups, slab pahoehoe lava mounds, lava drain-back, flow lobe overlaps; and (3) phreatic steam blasts; explosion pits, ejecta blankets of ash and blocks. Preliminary results indicate multiple fissure eruptions and growth of a basin-filled lava lake up to approximately 10 m thick with outflow sheet lava flows. Remnant mounds of original lake crust reveal an early high lava lake level, which subsided as much as 5 m as the molten interior drained back into the fissure system. Rapid loss of magma supply led to the collapse of fissure walls allowing groundwater influx that triggered multiple steam blasts along at least 500 m. Early blasts occurred while lake magma pressure was still high enough to produce squeeze-ups when penetrated by ejecta blocks. The King's Bowl pit crater exemplifies processes of a small, but highly energetic eruption that ejected blocks up to 2 m strewn over 200 m onto the lava lake surface. JF - American Geophysical Union Fall Meeting AU - Hughes, S S AU - Garry, B AU - Kobs-Nawotniak, S E AU - Sears, D W G AU - Borg, C AU - Elphic, R C AU - Haberle, C W AU - Kobayashi, L AU - Lim, D S S AU - Sears, H AU - Skok, J R AU - Heldmann, J L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13D EP - 3831 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765877194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=King%27s+Bowl+pit+crater%2C+lava+field+and+eruptive+fissure%2C+Idaho%3B+a+multipurpose+volcanic+planetary+analog&rft.au=Hughes%2C+S+S%3BGarry%2C+B%3BKobs-Nawotniak%2C+S+E%3BSears%2C+D+W+G%3BBorg%2C+C%3BElphic%2C+R+C%3BHaberle%2C+C+W%3BKobayashi%2C+L%3BLim%2C+D+S+S%3BSears%2C+H%3BSkok%2C+J+R%3BHeldmann%2C+J+L%3BAnonymous&rft.aulast=Hughes&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 - The lunar reconnaissance orbiter (LRO) at the dynamic Moon; five years of operations in lunar orbit; an overview of the mission, key science results, data products, and future measurements AN - 1765877171; 2016-012102 AB - The Lunar Reconnaissance Orbiter (LRO) has been orbiting the Moon for over five years. In that time, data from the seven instruments onboard the spacecraft have made significant advances in our understanding of the Moon and its environment. In September 2014 LRO completed its first Extended Science Mission (ESM) and began a second ESM (pending NASA approval). During the ESM and the second ESM, LRO has been in a quasi-stable, eccentric orbit of approximately 30 X 180 km with a periapse near the South Pole. This orbit enabled high-resolution measurements around the South Pole. LRO's seven instruments are operating nominally, and have experienced no significant degradation since beginning the ESM. The spacecraft has performed exceptionally well, with 98.4% uptime during the mission. LRO retains sufficient fuel so that its current orbit can be maintained for at least 8 years. LRO's science teams have been extremely productive, focusing on the distribution of volatiles, evidence for early differentiation, measuring the lunar impact record, and the Moon's interactions with its external environment. Three of the most exciting findings by LRO have been the identification of LRO-era impacts, global tectonic features, and the transient nature of some volatiles at the surface. These findings are areas of study for future LRO measurements. LRO's data are released to the PDS every 3 months, as of Aug. 2014 528.75 TB of data have been delivered by LRO. Many of the teams have delivered higher-level data products as part of their routine PDS deliveries (e.g., mosaics, maps, derived products). These products are intended to act as useful resources for the science community. Some higher-level LRO data products are of interest for future lunar landers. These products include illumination maps, meter-scale digital elevation models, roughness maps, and 50cm per pixel images of a range of possible landing sites. All of these products are available either from the PDS [1] or individual teams websites [2-5]. If members of the community require assistance finding and/or using data from LRO, they are invited to contact the authors of this abstract. [1] http://pds-geosciences.wustl.edu/missions/lro/default.htm [2] http://imbrium.mit.edu/ [3] http://diviner.ucla.edu/ [4] http://lroc.sese.asu.edu/ [5] http://lro.gsfc.nasa.gov/ JF - American Geophysical Union Fall Meeting AU - Petro, N E AU - Keller, J W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13D EP - 3842 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/1765877171?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+lunar+reconnaissance+orbiter+%28LRO%29+at+the+dynamic+Moon%3B+five+years+of+operations+in+lunar+orbit%3B+an+overview+of+the+mission%2C+key+science+results%2C+data+products%2C+and+future+measurements&rft.au=Petro%2C+N+E%3BKeller%2C+J+W%3BAnonymous&rft.aulast=Petro&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 - Tropospheric delay ray tracing applied in VLBI analysis AN - 1765874883; 2016-015612 AB - Tropospheric delay modeling error continues to be one of the largest sources of error in VLBI (very long baseline interferometry) analysis. For standard operational solutions, we use the VMF1 elevation-dependent mapping functions derived from European Centre for Medium-Range Weather Forecasts data. These mapping functions assume that tropospheric delay at a site is azimuthally symmetric. As this assumption is not true, we have instead determined the ray trace delay along the signal path through the troposphere for each VLBI quasar observation. We determined the troposphere refractivity fields from the pressure, temperature, specific humidity, and geopotential height fields of the NASA Goddard Space Flight Center Goddard Earth Observing System version 5 numerical weather model. When applied in VLBI analysis, baseline length repeatabilities were improved compared with using the VMF1 mapping function model for 72% of the baselines and site vertical repeatabilities were better for 11 of 13 sites during the 2 week CONT11 observing period in September 2011. When applied to a larger data set (2011-2013), we see a similar improvement in baseline length and also in site position repeatabilities for about two thirds of the stations in each of the site topocentric components. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Eriksson, David AU - MacMillan, D S AU - Gipson, John M Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 9156 EP - 9170 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 12 SN - 2169-9313, 2169-9313 KW - humidity KW - numerical models KW - prediction KW - atmospheric pressure KW - mathematical models KW - troposphere KW - very long baseline interferometry KW - meteorology KW - interferometry KW - temperature KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765874883?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Tropospheric+delay+ray+tracing+applied+in+VLBI+analysis&rft.au=McPeters%2C+Richard%3BFrith%2C+Stacey%3BLabow%2C+Gordon%3BSeftor%2C+Colin&rft.aulast=McPeters&rft.aufirst=Richard&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - 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 - 36 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-02-18 N1 - SubjectsTermNotLitGenreText - atmospheric pressure; humidity; interferometry; mathematical models; meteorology; numerical models; prediction; temperature; troposphere; very long baseline interferometry DO - http://dx.doi.org/10.1002/2014JB011552 ER - TY - JOUR T1 - The lunar data project; recovery and restoration of Apollo data AN - 1765874025; 2016-011928 AB - Apollo missions collected lunar data from orbit and the surface, including returns from long-lived Apollo Lunar Surface Experiments Package (ALSEP) stations that operated autonomously until shut-down in September, 1977. All of the early data were analyzed and reported over the duration of the Apollo missions, and some were archived, but due to several factors much of the later data were never examined or archived. In some cases, we had to search additional information sources to obtain missing critical metadata needed to understand the structure and formats. The data typically were archived on media such as microfilm or microfiche, which are not easily readable or amenable to numerical analysis, or stored on 7-track (since moved to 9-track) magnetic tape in older formats that are now complicated to process. In some cases the data did not have the necessary information to translate their output into scientifically useful numbers. In many cases where this information was available it was still necessary to reformat the numbers and describe them in a more accessible form. The Lunar Data Project was started at the Goddard Space Flight Center (GSFC) National Space Science Data Center (now the NASA Space Science Data Coordinated Archive (NSSDCA)) in 2003 to restore the archived Apollo data and convert it to usable fully-described digital data sets suitable for archive with the Planetary Data System (PDS). A committee of lunar scientists at GSFC was convened to determine the highest priority data sets for restoration. In 2007 the Lunar Data Node was created at GSFC under the auspices of the PDS Geosciences Node in order to facilitate archive of data sets with PDS. This data restoration is not only time critical due to the loss of ability to read older media, it is also urgent because many of the people with the knowledge of these data have retired and are difficult to contact. We will report on the efforts being made by the Lunar Data Project/Lunar Data Node, the specific data sets being restored, and the status of the restorations. JF - American Geophysical Union Fall Meeting AU - Williams, D R AU - Hills, H K AU - Taylor, P T AU - Grayzeck, E J AU - Guinness, E A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract IN41B EP - 3650 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/1765874025?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+lunar+data+project%3B+recovery+and+restoration+of+Apollo+data&rft.au=Williams%2C+D+R%3BHills%2C+H+K%3BTaylor%2C+P+T%3BGrayzeck%2C+E+J%3BGuinness%2C+E+A%3BAnonymous&rft.aulast=Williams&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 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 - Collaboratively conceived, designed and implemented; matching visualization tools with geoscience data collections and geoscience data collections with visualization tools via the ToolMatch service. AN - 1765873981; 2016-011918 AB - Two problems common to many geoscience domains are the difficulties in finding tools to work with a given dataset collection, and conversely, the difficulties in finding data for a known tool. A collaborative team from the Earth Science Information Partnership (ESIP) has gotten together to design and create a web service, called ToolMatch, to address these problems. The team began their efforts by defining an initial, relatively simple conceptual model that addressed the two uses cases briefly described above. The conceptual model is expressed as an ontology using OWL (Web Ontology Language) and DCterms (Dublin Core Terms), and utilizing standard ontologies such as DOAP (Description of a Project), FOAF (Friend of a Friend), SKOS (Simple Knowledge Organization System) and DCAT (Data Catalog Vocabulary). The ToolMatch service will be taking advantage of various Semantic Web and Web standards, such as OpenSearch, RESTful web services, SWRL (Semantic Web Rule Language) and SPARQL (Simple Protocol and RDF Query Language). The first version of the ToolMatch service was deployed in early fall 2014. While more complete testing is required, a number of communities besides ESIP member organizations have expressed interest in collaborating to create, test and use the service and incorporate it into their own web pages, tools and/or services including the USGS Data Catalog service, DataONE, the Deep Carbon Observatory, Virtual Solar Terrestrial Observatory (VSTO), and the U.S. Global Change Research Program. In this session, presenters will discuss the inception and development of the ToolMatch service, the collaborative process used to design, refine, and test the service, and future plans for the service. JF - American Geophysical Union Fall Meeting AU - Hoebelheinrich, N J AU - Lynnes, C AU - West, P AU - Ferritto, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract IN33C EP - 3784 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873981?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Collaboratively+conceived%2C+designed+and+implemented%3B+matching+visualization+tools+with+geoscience+data+collections+and+geoscience+data+collections+with+visualization+tools+via+the+ToolMatch+service.&rft.au=Hoebelheinrich%2C+N+J%3BLynnes%2C+C%3BWest%2C+P%3BFerritto%2C+M%3BAnonymous&rft.aulast=Hoebelheinrich&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 - Metal-silicate partitioning of uranium at high pressures and temperatures AN - 1765873862; 2016-011983 AB - Uranium, along with the other long-lived radioactive elements Th and K, are important heat sources in the Earth, contributing as much as 50% of the total heat flux at the surface. However, it is unknown whether these elements are also an important heat source in the core. Previous metal-silicate partitioning experiments of U have noted an increase in partition coefficient (D(U)) with decreasing oxygen fugacity and increasing S content. Regardless, they conclude that the partition coefficients are too low, even under the most extreme conditions, for U to be an important heat source in the Earth's core. However, all of those experiments were conducted at relatively low pressures (<29 GPa) and moderate temperatures (<2700 K). We present metal-silicate partitioning experiments conducted in the diamond anvil cell at conditions more relevant to a basal magma ocean, 40-55 GPa in pressure and 3700-4900 K in temperature. Under relatively reducing conditions (Delta IW=-1.5 to -2.5, with 15-30 wt% Si in the metal) and with no sulfur present, we measure partition coefficients for U in the range of 0.01-0.1, significantly higher than has been previously reported. From these results, we are unable to rule out the possibility that U is a significant heat source in the core. JF - American Geophysical Union Fall Meeting AU - Chidester, B AU - Righter, Kevin AU - Rahman, Zia AU - Campbell, A J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR41A EP - 4374 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/1765873862?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Metal-silicate+partitioning+of+uranium+at+high+pressures+and+temperatures&rft.au=Chidester%2C+B%3BRighter%2C+Kevin%3BRahman%2C+Zia%3BCampbell%2C+A+J%3BAnonymous&rft.aulast=Chidester&rft.aufirst=B&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 - A user interface for identifying volcanic layers in CALIPSO and CATS lidar observations AN - 1765873780; 2016-011951 AB - The CALIPSO satellite provides profile measurements of aerosols and clouds over the globe and has operated near-continuously since its launch in 2006. The CALIPSO lidar (known as CALIOP) is adept at identifying isolated aerosol layers and provides information on their composition that is available for quasi-real time forecasting applications (routine browse images are available at www-calipso.larc.nasa.gov). This information can be used effectively to identify volcanic (and dust) plumes and forecast of aerosol dispersion when coupled with a trajectory model. On several occasions such as during the eruptions of Eyjafjallajokull in 2010 and Kelud in 2014, the CALIPSO data aided forecasters from aviation Volcanic Ash Advisory Centers with information on the location and height of volcanic plumes that helped with their hazard assessments. This paper presents a prototype GUI that aids data users with identifying volcanic layers from CALIPSO browse imagery. A notable aspect of the tool is the ability to select individual features as a collection of individual profile observations and save them into a database or initiate a forward/backward trajectory model using coordinates obtained from the composite object. Examples will be presented that demonstrate the applicability of the GUI using the HySplit and NASA trajectory models. This tool will also be able to support lidar measurements expected from the new Cloud-Aerosol Transport System (CATS) lidar that will be deployed on the International Space Station in the near future. JF - American Geophysical Union Fall Meeting AU - Trepte, C R AU - Vernier, J P AU - Fairlie, T D AU - Murray, J J AU - McGill, M J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract IN43C EP - 3699 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/1765873780?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+user+interface+for+identifying+volcanic+layers+in+CALIPSO+and+CATS+lidar+observations&rft.au=Trepte%2C+C+R%3BVernier%2C+J+P%3BFairlie%2C+T+D%3BMurray%2C+J+J%3BMcGill%2C+M+J%3BAnonymous&rft.aulast=Trepte&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - InSAR assessment of ground deformations in shoreline urban areas associated to hydraulic head variations AN - 1765873709; 2016-011747 AB - Monitoring ground deformations in highly dense populated shoreline and lowlands areas such as Montreal is crucial for the sustainable development of urban infrastructures. Montreal already undergoes house foundations damages with a density of 8 repairs per square kilometer, especially over clay deposits such as in the Plateau neighborhood with a density of 89 repairs/km2. Using Radarsat-2 C-Band SAR interferometry, we observe a 3-5 mm ground LOS displacement variation temporally out-phased by three months relative to the 2 meter subartesian aquifer hydraulic head and river level variations, over a 60 km2 zone located in the central part of the Montreal Island in eastern Canada, from 2008 to 2010. Using ascending and descending SAR acquisition mode we extract the vertical component of the LOS velocities and observe secular displacements relative to a unconfined aquifer. These displacements are 2 mm/year subsidence on the minor topographic high, associated with evapotranspiration. We also observe ground water recharge and approximately 1 mm/year uplift downhill related to ground water discharge from deep regional aquifer enhanced with a faults system and shallow local aquifer arising from transmissivity. Displacements observed during this two year study are small but they are significant if integrated over the average lifetime of a house. We conclude that hydraulic head is related to the observed ground deformation in most of the areas of Montreal. Moreover, wetter climate conditions forecast for this area will definitely increase the aquifer dynamics; thus, more ground deformations are foreseen and have to be considered in future infrastructure design standards. JF - American Geophysical Union Fall Meeting AU - Normand, Jonathan AU - Heggy, Essam AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H51B EP - 0596 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873709?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+assessment+of+ground+deformations+in+shoreline+urban+areas+associated+to+hydraulic+head+variations&rft.au=Normand%2C+Jonathan%3BHeggy%2C+Essam%3BAnonymous&rft.aulast=Normand&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 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 - The ALSEP Data Recovery Focus Group of NASA's solar system exploration research virtual institute AN - 1765873648; 2016-011929 AB - Astronauts on Apollo 12, 14, 15, 16, and 17 deployed instruments on the Moon for 14 geophysical experiments (passive & active seismic, heat flow, magnetics, etc.) from 1969 to 1972. These instruments were called Apollo Lunar Surface Experiments Packages (ALSEPs). ALSEPs kept transmitting data to the Earth until September 1977. When the observation program ended in 1977, a large portion of these data were not delivered to the National Space Science Data Center for permanent archive. In 2010, for the purpose of searching, recovering, preserving, and analyzing the data that were not previously archived, NASA's then Lunar Science Institute formed the ALSEP Data Recovery Focus Group. The group consists of current lunar researchers and those involved in the ALSEP design and data analysis in the 1960s and 1970s. Among the data not previously archived were the 5000+ 7-track open-reel tapes that recorded raw data from all the ALSEP instruments from April 1973 to February 1976 ("ARCSAV tapes"). These tapes went missing in the decades after Apollo. One of the major achievements of the group so far is that we have found 450 ARCSAV tapes from April to June 1975 and that we are extracting data from them. There are 3 other major achievements by the group. First, we have established a Web portal at the Lunar and Planetary Institute, where approximately 700 ALSEP-related documents, totaling approximately 40,000 pages, have been digitally scanned and cataloged. Researchers can search and download these documents at www.lpi.usra.edu/ lunar/ALSEP/. Second, we have been retrieving notes and reports left behind by the now deceased/retired ALSEP investigators at their home institutions. Third, we have been re-analyzing the ALSEP data using the information from the recently recovered metadata (instrument calibration data, operation logs, etc.). Efforts are ongoing to get these data permanently archived in the Planetary Data System (PDS). JF - American Geophysical Union Fall Meeting AU - Nagihara, S AU - Lewis, L R AU - Nakamura, Y AU - Williams, D R AU - Taylor, P T AU - Hills, H K AU - Kiefer, W S AU - Neal, C R AU - Schmidt, G K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract IN41B EP - 3651 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/1765873648?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+ALSEP+Data+Recovery+Focus+Group+of+NASA%27s+solar+system+exploration+research+virtual+institute&rft.au=Nagihara%2C+S%3BLewis%2C+L+R%3BNakamura%2C+Y%3BWilliams%2C+D+R%3BTaylor%2C+P+T%3BHills%2C+H+K%3BKiefer%2C+W+S%3BNeal%2C+C+R%3BSchmidt%2C+G+K%3BAnonymous&rft.aulast=Nagihara&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 - A new long term data set of SO (sub 2) column amount from volcanic eruptions using TOMS data AN - 1765873599; 2016-011902 AB - Volcanic SO2 is an important trace gas in the atmosphere that affects air quality and which is also a precursor to the production of sulfate aerosols. The Total Ozone Mapping Spectrometer (TOMS) was the first NASA UV instrument to measure daily maps of ozone and volcanic sulfur dioxide globally. It has been flown on four different satellites since its first launch aboard Nimbus 7 in 1978. The instrument provides a unique global long-term record of volcanic SO2, which have been invaluable to study the response of earth's climate system to volcanic eruptions. However, complete TOMS SO2 L2 data has not yet been previously processed and properly archived. As part of the NASA MEaSUREs SO2 Program we updated heritage TOMS SO2 algorithm in preparation to re-processing and archiving TOMS data. We have also applied our TOMS algorithm to the L1B measurements of the hyperspectral UV Ozone Monitoring Instrument (OMI) that has been flown on NASA Aura EOS spacecraft since 2004. Due to its hyperspectral capability and smaller field of view OMI SO2 sensitivity is more than hundred times larger than TOMS. The unique challenge is combining TOMS and OMI SO2 records to create a continuous long-term Climate Data record (CDR) to be released to the research community. This data set will provide researchers with continuous Level 2 estimates of SO2 and will help to validate and expand the current catalog of volcanic activity. JF - American Geophysical Union Fall Meeting AU - Fisher, B L AU - Krotkov, N A AU - Bhartia, P K AU - Haffner, D P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract IN31A EP - 3712 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/1765873599?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+new+long+term+data+set+of+SO+%28sub+2%29+column+amount+from+volcanic+eruptions+using+TOMS+data&rft.au=Fisher%2C+B+L%3BKrotkov%2C+N+A%3BBhartia%2C+P+K%3BHaffner%2C+D+P%3BAnonymous&rft.aulast=Fisher&rft.aufirst=B&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 - Lunar proton albedo anomalies; soil, surveyors, and statistics AN - 1765873419; 2016-012112 AB - Since the launch of LRO in 2009, the CRaTER instrument has been mapping albedo protons ( approximately 100 MeV) from the Moon. These protons are produced by nuclear spallation, a consequence of galactic cosmic ray (GCR) bombardment of the lunar regolith. Just as spalled neutrons and gamma rays reveal elemental abundances in the lunar regolith, albedo protons may be a complimentary method for mapping compositional variations. We presently find that the lunar maria have an average proton yield 0.9% + or -0.3% higher than the average yield in the highlands; this is consistent with neutron data that is sensitive to the regolith's average atomic weight. We also see cases where two or more adjacent pixels (15 degrees X 15 degrees ) have significantly anomalous yields above or below the mean. These include two high-yielding regions in the maria, and three low-yielding regions in the far-side highlands. Some of the regions could be artifacts of Poisson noise, but for completeness we consider possible effects from compositional anomalies in the lunar regolith, including pyroclastic flows, antipodes of fresh craters, and so-called "red spots". We also consider man-made landers and crash sites that may have brought elements not normally found in the lunar regolith. JF - American Geophysical Union Fall Meeting AU - Wilson, J K AU - Schwadron, N AU - Spence, H E AU - Case, A W AU - Golightly, M J AU - Jordan, A AU - Looper, M D AU - Petro, N E AU - Robinson, M S AU - Stubbs, T J AU - Zeitlin, C J AU - Blake, J B AU - Kasper, J C AU - Mazur, J E AU - Smith, S S AU - Townsend, L W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13D EP - 3853 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/1765873419?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Lunar+proton+albedo+anomalies%3B+soil%2C+surveyors%2C+and+statistics&rft.au=Wilson%2C+J+K%3BSchwadron%2C+N%3BSpence%2C+H+E%3BCase%2C+A+W%3BGolightly%2C+M+J%3BJordan%2C+A%3BLooper%2C+M+D%3BPetro%2C+N+E%3BRobinson%2C+M+S%3BStubbs%2C+T+J%3BZeitlin%2C+C+J%3BBlake%2C+J+B%3BKasper%2C+J+C%3BMazur%2C+J+E%3BSmith%2C+S+S%3BTownsend%2C+L+W%3BAnonymous&rft.aulast=Wilson&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - An improved instrument for angular scattering measurements of candidate planetary surface regolith materials at extremely small phase angles; relevance to the outer solar system AN - 1765873404; 2016-012091 AB - The reflection variation and the polarization change with phase angle of radiation scattered from particulate materials has been studied for a century in efforts to understand the nature of clouds, aerosols, planetary ring systems and planetary regolith materials. The increase in reflectance as phase angle decreases, the "Opposition Effect", has been well documented in astronomical observations and laboratory studies. Variations in linear polarization near small phase angles have also been well studied (e.g. Shkuratov et al., 2002, Rosenbush et al. 2015). While the phenomena have been well documented, a generally accepted physical explanation is still lacking despite many excellent theoretical modeling efforts. We have undertaken a reductionist approach in deconstructing the process. We have fabricated a goniometer which permits us to present samples with discrete wavelengths of monochromatic light that is linearly polarized in and perpendicular to the scattering plane. We also can illuminate our samples with both right handed and left handed circular polarization senses. Silicon Avalanche Photodiodes record the reflected radiation from the sample after it has passed through linear and circular polarizing analyzers (Kroner et al.). This reductionist approach permits us to measure the reflectance and polarization phase curves and the change in linear and circular polarization ratio (LPR and CPR) with phase angle between 0.056 and 17 degrees. LPR and CPR are found to be important indicators of the amount of multiple scattering in the medium (Hapke, 1990, Nelson et al., 1998, 2000; Hapke, 2012). This approach provides a way to distinguish between suggested models and to gain greater insight into the process of the scattering of electromagnetic radiation in a variety of media. This work was supported by NASA's Cassini Science Program, Hapke, B. (1990), Icarus, 88, 407-217. Hapke, B. (2012). Theory of reflectance and emittance spectroscopy, Cambridge U. Press, New York. Kroner et al., this meeting. Nelson et al., 1998, Icarus, 131, 223-230. Nelson et al., 2000, Icarus, 147, 535-558. Rosenbush et al., in Polarization of stars and planetary systems (Eds. Kolokolova, Hough, Levasseur-Regourd), Cambridge University Press, 2015 (in press). Shkuratov et al., 2002, Icarus 159, 396-416(2002). JF - American Geophysical Union Fall Meeting AU - Nelson, R M AU - Boryta, M D AU - Hapke, B W AU - Manatt, K AU - Kroner, D O AU - Smythe, W D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13C EP - 3825 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/1765873404?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+improved+instrument+for+angular+scattering+measurements+of+candidate+planetary+surface+regolith+materials+at+extremely+small+phase+angles%3B+relevance+to+the+outer+solar+system&rft.au=Nelson%2C+R+M%3BBoryta%2C+M+D%3BHapke%2C+B+W%3BManatt%2C+K%3BKroner%2C+D+O%3BSmythe%2C+W+D%3BAnonymous&rft.aulast=Nelson&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Fe (super 3+) partitioning during basalt differentiation on Mars; insights into the oxygen fugacity of the shergottite mantle source(s) AN - 1765873389; 2016-012351 AB - The partitioning of Fe (super 3+) between silicate melts and minerals is a key parameter to understand magmatic processes, as it is directly linked to oxygen fugacity (fO (sub 2) ). fO (sub 2) is, a priori, not a constant during magmatic processes, and its evolution depends on the compatibility of Fe (super 3+) . We have experimentally determined the partition coefficients of Fe (super 3+) between augite, pigeonite, and silicate melt, and use them to constrain the fO (sub 2) of the martian mantle and of differentiated martian basalts. A series of experiments on various martian basaltic compositions were performed under controlled fO (sub 2) in one-atmosphere gas-mixing furnaces. Fe (super 3+) /Fe (sub total) ratios in silicate melts and pyroxenes were determined using synchrotron Fe K-edge XANES on the 13 IDE beamline at APS (Argonne). Fe (super 3+) mineral/melt partition coefficients (DFe (super 3+) ) for augite and pigeonite were obtained with a relative uncertainty of 10-15%. Both are constant over a wide range of oxygen fugacity (FMQ-2.5 to FMQ+2.0). DFe (super 3+) for augite and pigeonite are broadly consistent with previous data by [1], but DFe (super 3+) for augite is significantly higher (by a factor of 2) than the indirect determinations of [2]. Since augites in [2] are extremely poor in iron compared to ours (0.18 wt% vs 13 wt% FeO), this strongly suggests that DFe (super 3+) varies with Mg#, indicating that Fe (super 3+) is more compatible than previously thought in terrestrial mantle pyroxenes (3 wt% FeO) as well. Crystallization paths for shergottite parental melts have been calculated using the MELTS software, combined with our partition coefficients. fO (sub 2) in the residual melts is calculated from the models of [3] and [4]. It stays relatively constant at high temperatures, but increases very strongly during the latest stages of crystallization. These results explain the large range of fO (sub 2) determined in enriched shergottites. In order to estimate the fO (sub 2) of the martian mantle, only the highest temperature phases in the most primitive martian samples should be used. The most primitive shergottites record a mantle fO (sub 2) around FMQ-2.5, consistent with the lowest fO (sub 2) estimated for surface basalts [5]. [1] McCanta et al. (2004) Am Min 89:1685-1693; [2] Mallmann and O'Neill (2009) J Petrol 50:1765-1794; [3] Righter et al. (2013) Am Min 98:616-628; [4] Kress and Carmichael (1991) CMP 108:82-92; [5] Schmidt ME et al. (2014) EPSL 384:198-208. JF - American Geophysical Union Fall Meeting AU - Medard, E AU - Martin, A M AU - Collinet, M AU - Righter, Kevin AU - Grove, T L AU - Newville, M AU - Lanzirotti, A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract V52B EP - 03 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/1765873389?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Fe+%28super+3%2B%29+partitioning+during+basalt+differentiation+on+Mars%3B+insights+into+the+oxygen+fugacity+of+the+shergottite+mantle+source%28s%29&rft.au=Medard%2C+E%3BMartin%2C+A+M%3BCollinet%2C+M%3BRighter%2C+Kevin%3BGrove%2C+T+L%3BNewville%2C+M%3BLanzirotti%2C+A%3BAnonymous&rft.aulast=Medard&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 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 - Number of references - 5 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Phobos' low bulk density; evidence against a capture origin? AN - 1765873316; 2016-012106 AB - Phobos' low density of 1.876 + or - 0.02 g/cm3 (Andert et al., 2010, Witasse et al., 2013, Paetzold et al., 2013) supports its formation from a disk of debris (Peale 2007). The disk would either be a remnant of the formation of Mars (Safronov et al., 1986) or the result of a collision between Mars and a large body (Craddock 1994, 2011; Singer 2007). Within this scenario a large interior porosity would be responsible for the low density of the re-accreted material forming Phobos. Thermal emission spectra of Phobos suggest an ultramafic composition with the presence of phyllosilicates and feldspathoids in some regions (Giuranna et al., 2011), consistent with Phobos' in situ formation (Giuranna et al., 2011). However, the 0.3-4.0 mu m surface spectra taken from multiple areas of the body in more than 43 years of observations (Duxbury et al., 2013), show physical characteristics similar to low-albedo asteroids such as C-type (Masursky et al., 1972, Pang et al., 1980) or D-type (Murchie 1999, Rivkin et al., 2002, Lynch et al., 2007, Pajola et al., 2012). They argue in favor of an asteroidal capture scenario that could be explained by binary asteroid dissociation (Landis 2009) or by collisional capture in the Martian orbital region (Pajola et al., 2012). Finally recent work by Schmedemann et al., (2014) indicates Phobos' surface to be approximately 4.3-3.7 Ga, dating back to a period where there was an intensification in the number of impactors in the inner Solar System (Gomes et al., 2005), and supporting both the in-situ and the capture scenario. Pajola et al. (2013) match the surface reflectance of Phobos from 0.4 to 4.0 mu m with a mineralogical model composed of a mixture of Tagish Lake meteorite (TL) and Pyroxene Glass (PM80). Based on the published model, we adopted the weighted TL and PM80 densities to investigate if the low bulk density of Phobos could conform with these components reconciling both inner properties and surface spectra. While the TL density is available from measurements by Hildebrand et al. (2006), that of PM80 (Jager et al., 1994) has not been measured. In its stead, we have adopted density values of different pyroxene glasses from the literature (Karamanov and Pelino, 1999, and Smithsonian Physical Tables 1921) along with the density of mafic-rich glasses with VNIR spectra similar to PM80. We present our results. JF - American Geophysical Union Fall Meeting AU - Dalle Ore, C AU - Pajola, M AU - Lazzarin, M AU - Roush, T L AU - Cruikshank, D P AU - Pendleton, Y J AU - Carli, C AU - Bertini, I AU - Magrin, S AU - La Forgia, F AU - Barbieri, C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13D EP - 3846 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/1765873316?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Phobos%27+low+bulk+density%3B+evidence+against+a+capture+origin%3F&rft.au=Dalle+Ore%2C+C%3BPajola%2C+M%3BLazzarin%2C+M%3BRoush%2C+T+L%3BCruikshank%2C+D+P%3BPendleton%2C+Y+J%3BCarli%2C+C%3BBertini%2C+I%3BMagrin%2C+S%3BLa+Forgia%2C+F%3BBarbieri%2C+C%3BAnonymous&rft.aulast=Dalle+Ore&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - A study of the King's Bowl phreatic explosion crater as an analog to pits on solar system exploration target bodies AN - 1765872391; 2016-012093 AB - The phreatic explosion crater King's Bowl (KB), at Craters of the Moon, Idaho, can serve as an analog to pits with similar morphologies on the Moon, Mars, and Vesta. These pits are associated with the release of water and are of interest to the planetary science and astrobiology research communities. KB crater was formed 2,220 + or - 100 B.P. when a magmatic dike encountered subsurface water. The resulting explosion created an 85 m long, 30 m wide and 30 m deep crater and ejected blocks distances in excess of 100 m. Here we describe fieldwork and observations performed by the NASA SSERVI FINESSE (Field Investigations to Enable Solar System Science) team. Our objective is to utilize the distribution of ejecta blocks at King's Bowl to better understand the formation energetics associated with such pits and to quantify the amount of water necessary to produce them on other planetary bodies. We focused on the western KB ejecta field, and ran a westerly line, a line N45 degrees W, and a line S45 degrees W. Along these transects, we photographed and recorded the location, size and mass (when 20 cm. We collected photographs normal to the surface, every 10 m, to determine block number density. Thirdly, we walked in a raster pattern through the field cataloging blocks >20 cm. Finally, we mapped the perimeter of the crater. Initial results suggest similarities between KB ejecta distributions and ejecta of impact craters on Earth, asteroids, Phobos, Deimos, and the Moon. These similarities are; the radial extent of the ejecta, the decrease in number density with distance, the aspect ratio of the blocks, proximity of the largest blocks to the rim, and the size of the largest blocks relative to the crater diameter. This implies a similar physics of formation on differing bodies whether derived through impact or phreatic explosion. Further studies at KB crater will provide insight to the formation of phreatic explosion pits on other planetary bodies, most especially the volume of water necessary to form them. JF - American Geophysical Union Fall Meeting AU - Sears, D W G AU - Hughes, S S AU - Kobs-Nawotniak, S E AU - Borg, C AU - Kim, K J AU - Sears, H AU - Skok, J R AU - Elphic, R C AU - Lim, D S S AU - Heldmann, J L AU - Haberle, C W AU - Guy, H AU - Kobayashi, L AU - Garry, B AU - Neish, C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13D EP - 3830 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/1765872391?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+study+of+the+King%27s+Bowl+phreatic+explosion+crater+as+an+analog+to+pits+on+solar+system+exploration+target+bodies&rft.au=Sears%2C+D+W+G%3BHughes%2C+S+S%3BKobs-Nawotniak%2C+S+E%3BBorg%2C+C%3BKim%2C+K+J%3BSears%2C+H%3BSkok%2C+J+R%3BElphic%2C+R+C%3BLim%2C+D+S+S%3BHeldmann%2C+J+L%3BHaberle%2C+C+W%3BGuy%2C+H%3BKobayashi%2C+L%3BGarry%2C+B%3BNeish%2C+C%3BAnonymous&rft.aulast=Sears&rft.aufirst=D+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 - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Solar wind implantation into lunar regolith; hydrogen retention in a surface with defects AN - 1765871731; 2016-012097 AB - Solar wind protons are implanted directly into the top 100 nanometers of the lunar near-surface region, but can either quickly diffuse out of the surface or be retained, depending upon surface temperature and the activation energy, U, associated with the implantation site. In this work, we explore the distribution of activation energies upon implantation and the associated hydrogen-retention times; this for comparison with recent observation of OH on the lunar surface. We apply a Monte Carlo approach: for simulated solar wind protons at a given local time, we assume a distribution of U values with a central peak, Uc and width, Uw, and derive the fraction retained for long periods in the near-surface. We find that surfaces characterized by a distribution with predominantly large values of U (> 1 eV) like that expected at defect sites will retain implanted Hs (to likely form OH). Surfaces with the distribution predominantly at small values of U (< 0.2 eV) will quickly diffuse away implanted Hs. However, surfaces with a large portion of implantation activation energies between 0.3 eV < U < 0.9 eV will tend to be H-retentive in cool conditions but transform into H-emissive surfaces when warmed (as when the surface rotates into local noon). These mid-range activation energies give rise to a diurnal effect with diffusive loss of H at noontime. JF - American Geophysical Union Fall Meeting AU - Farrell, W M AU - Hurley, D AU - Zimmerman, M I AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13D EP - 3835 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/1765871731?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Solar+wind+implantation+into+lunar+regolith%3B+hydrogen+retention+in+a+surface+with+defects&rft.au=Farrell%2C+W+M%3BHurley%2C+D%3BZimmerman%2C+M+I%3BAnonymous&rft.aulast=Farrell&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 - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integration of 3 consecutive years of aqueous geochemistry monitoring serpentinization at the Coast Range Ophiolite microbial observatory (CROMO), Northern California, USA AN - 1765871675; 2016-012373 AB - In August 2011, a set of 8 groundwater monitoring wells were established in actively serpentinizing ultramafic rocks of the Coast Range Ophiolite near Lower Lake, CA, as a NASA Astrobiology Institute project (Cardace et al., 2013). These wells have enabled repeated sampling and analysis of aqueous geochemistry, which we now present in an integrated model of the progress of serpentinization at this locality. The Coast Range Ophiolite Microbial Observatory (CROMO) plumbs groundwaters percolating through a tectonic melange of Jurassic-aged oceanic crust, with blocks of metabasalt and metagabbro, variably serpentinized ultramafics, Great Valley Sequence sedimentary rocks including the Jurassic Knoxville formation and the Cretaceous Crack Canyon formation, as well as rocks resulting from silica-carbonate alteration of serpentinites (marginal listvenites). All of these rock units are accessible in the McLaughlin Natural Reserve (administered by the University of California-Davis). In this work, we report on persistent geochemical trends in CROMO waters, which are gas-rich, high pH (11+), Ca (super 2+) -OH- type waters, contrast their characteristics with other continental sites of serpentinization and deep sea serpentinizing vent systems, and place the evolution of these waters in a water-rock reaction context based on geochemical modeling. JF - American Geophysical Union Fall Meeting AU - Cardace, D AU - Hoehler, Tori M AU - McCollom, T M AU - Schrenk, M O AU - Kubo, Michael D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract V53A EP - 4835 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02B:Hydrochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765871675?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Integration+of+3+consecutive+years+of+aqueous+geochemistry+monitoring+serpentinization+at+the+Coast+Range+Ophiolite+microbial+observatory+%28CROMO%29%2C+Northern+California%2C+USA&rft.au=Cardace%2C+D%3BHoehler%2C+Tori+M%3BMcCollom%2C+T+M%3BSchrenk%2C+M+O%3BKubo%2C+Michael+D%3BAnonymous&rft.aulast=Cardace&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 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 - Combined UAVSAR and GPS estimates of fault slip for the M 6.0 south Napa earthquake AN - 1765871627; 2016-012218 AB - The South Napa to Santa Rosa area has been observed with NASA's UAVSAR since late 2009 as part of an experiment to monitor areas identified as having a high probability of an earthquake. The M 6.0 South Napa earthquake occurred on 24 August 2014. The area was flown 29 May 2014 preceeding the earthquake, and again on 29 August 2014, five days after the earthquake. The UAVSAR results show slip on a single fault at the south end of the rupture near the epicenter of the event. The rupture branches out into multiple faults further north near the Napa area. A combined inversion of rapid GPS results and the unwrapped UAVSAR interferogram indicate nearly pure strike slip motion. Using this assumption, the UAVSAR data show horizontal right-lateral slip across the fault of 19 cm at the south end of the rupture and increasing to 70 cm northward over a distance of 6.5 km. The joint inversion indicates slip of approximately 30 cm on a network of sub-parallel faults is concentrated in a zone about 17 km long. The lower depths of the faults are 5-8.5 km. The eastern two sub-parallel faults break the surface, while three faults to the west are buried at depths ranging from 2-6 km with deeper depths to the north and west. The geodetic moment release is equivalent to a M 6.1 event. Additional ruptures are observed in the interferogram, but the inversions suggest that they represent superficial slip that does not contribute to the overall moment release. JF - American Geophysical Union Fall Meeting AU - Donnellan, Andrea AU - Parker, Jay W AU - Hawkins, Brian P AU - Hensley, Scott AU - Jones, Cathleen E AU - Owen, Susan E AU - Moore, Angelyn W AU - Wang, Jun AU - Pierce, Marlon E AU - Rundle, John B AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S31G EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765871627?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+UAVSAR+and+GPS+estimates+of+fault+slip+for+the+M+6.0+south+Napa+earthquake&rft.au=Donnellan%2C+Andrea%3BParker%2C+Jay+W%3BHawkins%2C+Brian+P%3BHensley%2C+Scott%3BJones%2C+Cathleen+E%3BOwen%2C+Susan+E%3BMoore%2C+Angelyn+W%3BWang%2C+Jun%3BPierce%2C+Marlon+E%3BRundle%2C+John+B%3BAnonymous&rft.aulast=Donnellan&rft.aufirst=Andrea&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 - PlanetVac; sample return with a puff of gas AN - 1765871621; 2016-012053 AB - PlanetVac is a regolith sample acquisition mission concept that uses compressed gas to blow material from the surface up a pneumatic tube and directly into a sample return container. The PlanetVac sampling device is built into the lander legs to eliminate cost and complexity associated with robotic arms and scoops. The pneumatic system can effectively capture fine and coarse regolith, including small pebbles. It is well suited for landed missions to Mars, asteroids, or the Moon. Because of the low pressures on all those bodies, the technique is extremely efficient. If losses are kept to minimum, 1 gram of compressed gas could efficiently lift 6000 grams of soil. To demonstrate this approach, the PlanetVac lander with four legs and two sampling tubes has been designed, integrated, and tested. Vacuum chamber testing was performed using two well-known planetary regolith simulants: Mars Mojave Simulant (MMS) and lunar regolith simulant JSC-1A. One of the two sampling systems was connected to a mockup of an Earth return rocket while the second sampling system was connected to a lander deck mounted instrument (clear box for easy viewing). The tests included a drop from a height of approximately 50 cm onto the bed of regolith, deployment of sampling tubes into the regolith, pneumatic acquisition of sample into an instrument (sample container) and the rocket, and the launch of the rocket. The demonstration has been successful and can be viewed here: https://www.youtube.com/watch?v=DjJXvtQk6no. In most of the tests, 20 grams or more of sample was delivered to the "instrument" and approximately 5 grams of regolith was delivered into a sampling chamber within the rocket. The gas lifting efficiency was calculated to be approximately 1000:1; that is 1 gram of gas lofted 1000 grams of regolith. Efficiencies in lower gravity environments are expected to be much higher. This successful, simple and lightweight sample capture demonstration paves the way to using such sampling system on either NASA or commercial landers to the Moon, Asteroids, comets, or Mars. JF - American Geophysical Union Fall Meeting AU - Zacny, K AU - Mueller, R AU - Betts, B H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11D EP - 01 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/1765871621?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=PlanetVac%3B+sample+return+with+a+puff+of+gas&rft.au=Zacny%2C+K%3BMueller%2C+R%3BBetts%2C+B+H%3BAnonymous&rft.aulast=Zacny&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 - Lunar impact ejecta; the view from radar and thermal infrared observations AN - 1765871619; 2016-012071 AB - The lunar regolith is derived from impact ejecta, and so understanding ejecta characteristics is a key element of regolith studies. Here we report on the physical properties of impact ejecta from Earth-based and orbital radar (Arecibo/Green Bank telescopes at 12.6- and 70-cm wavelengths, and the Lunar Reconnaissance Orbiter Mini-RF) and LRO Diviner thermal infrared observations. Diviner thermal IR data provide estimates of surface rock abundance, and the radar datasets reveal rocks buried beneath up to several meters of regolith. These four datasets represent a spectrum of observational wavelengths, and their intercomparison provides a means of constraining both ejecta block content and depth extent. We examine all craters on the lunar nearside that show evidence for blocky ejecta, whether buried or on the surface, in order to investigate spatial, crater size-, and time-dependent variations in ejecta block size distribution and spatial extent. Previous work has shown that it is possible to quantify the relationship between surface ejecta rock content and crater age for craters younger than approximately 1 Gyr; we will now present the results of our effort to extend the age range over which this relationship can be applied by investigating buried ejecta as well. Further, we report on the thermophysical characteristics of distal fine-grained ejecta that have previously been shown to exhibit unique radar characteristics (low radar return and circular polarization ratio). Our results constrain the physical properties of ejecta, and variations in those properties with time and depth, to an extent not possible from examination of visible-wavelength images and multispectral data alone. JF - American Geophysical Union Fall Meeting AU - Ghent, R R AU - Carter, L M AU - Tai Udovicic, C J AU - Bandfield, J L AU - Campbell, B A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P12B EP - 04 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/1765871619?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Lunar+impact+ejecta%3B+the+view+from+radar+and+thermal+infrared+observations&rft.au=Ghent%2C+R+R%3BCarter%2C+L+M%3BTai+Udovicic%2C+C+J%3BBandfield%2C+J+L%3BCampbell%2C+B+A%3BAnonymous&rft.aulast=Ghent&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Deep dielectric and surface charging of regolith in the Moon's permanently shadowed regions AN - 1765871601; 2016-012060 AB - Galactic cosmic rays (GCRs) and solar energetic particles (SEPs) can penetrate into the lunar regolith, causing deep dielectric (or subsurface) charging. The regolith discharges with a timescale that depends on temperature. In permanently shadowed regions (PSRs), for example, this timescale is approximately 20 days. To estimate the effects of subsurface charging, Jordan et al. [2014] created a data-driven, deep dielectric charging model. The model used GCR data from the Cosmic Ray Telescope for the Effects of Radiation (CRaTER) on the Lunar Reconnaissance Orbiter (LRO) and SEP data from the Electron, Proton, and Alpha Monitor (EPAM) on the Advanced Composition Explorer (ACE). Data-driven runs of the model indicated that GCRs create, throughout the top tens of centimeters of regolith, a persistent electric field of up to approximately 700 V/m. They also indicated that large SEP events could create episodic subsurface electric fields of > or =106 V/m, possibly inducing dielectric breakdown. Over time, such SEP events may drive "breakdown weathering," preferentially enhancing the fraction of fine and monomineralic grains within PSRs. This model assumed that no other charging processes exist, i.e., that the environment is a vacuum. Solar wind plasma, however, can enter PSRs and charge the regolith's surface, so we revise the model to include this charging. While it cannot simultaneously nullify or decrease all the subsurface electric fields found using the model's previous iteration, adding this process does change the depth profile and maxima of the electric fields. Using the data-driven results of the revised model, we estimate the subsurface electric fields due to the solar wind, GCRs, and SEPs. We also show how including solar wind charging affects the possibility of dielectric breakdown and the importance of breakdown weathering to the regolith in PSRs. Reference: Jordan, A. P., T. J. Stubbs, J. K. Wilson, N. A. Schwadron, H. E. Spence, and C. J. Joyce (2014), Deep dielectric charging of regolith within the Moon's permanently shadowed regions, J. Geophys. Res.-Planet, DOI: 10.1002/2014JE004648. JF - American Geophysical Union Fall Meeting AU - Jordan, A AU - Stubbs, T J AU - Wilson, J K AU - Schwadron, N AU - Spence, H E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11D 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/1765871601?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+dielectric+and+surface+charging+of+regolith+in+the+Moon%27s+permanently+shadowed+regions&rft.au=Jordan%2C+A%3BStubbs%2C+T+J%3BWilson%2C+J+K%3BSchwadron%2C+N%3BSpence%2C+H+E%3BAnonymous&rft.aulast=Jordan&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 - Lunar phase function in the near-infrared from the Lunar Orbiter Laser Altimeter AN - 1765871600; 2016-012083 AB - The reflectance of the lunar surface as a function of wavelength and viewing geometry is a fundamental measurement related to the scattering properties of the regolith particles and the structure of the surface. In this study, we report preliminary results on the near-infrared phase function observed with the Lunar Orbiter Laser Altimeter (LOLA) onboard the Lunar Reconnaissance Orbiter. Since December 2013, LOLA has been collecting passive radiometry (reflected sunlight) in the northern hemisphere where the spacecraft altitude is too high for normal altimetric ranging. In this mode, LOLA acts as a 4-pixel radiometer with pixel size approximately 60 m, integration time of 1/28th sec (every approximately 60 m along-track), and signal-to-noise ratio approximately 50 per pixel in a single "exposure" at low latitudes. We report on the passive radiometric calibration, and compare the LOLA near-infrared phase function to that at similar and smaller wavelengths measured with other instruments. The unique capability of LOLA to also actively measure the normal albedo from the received pulse energies during altimetric ranging provides a crucial anchor point for the passively-derived phase function that is not easily obtained with typical imagers. Finally, we explore what constraints can be placed on the parameters of physically-motivated phase function models. This work will ultimately provide insight on the wavelength dependence of the phase function, for which the theoretical understanding is presently incomplete. JF - American Geophysical Union Fall Meeting AU - Barker, M K AU - Mazarico, E AU - Sun, X AU - Neumann, G A AU - Smith, D E AU - Zuber, M T AU - Lucey, P G AU - Torrence, M H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13B EP - 3813 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/1765871600?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Lunar+phase+function+in+the+near-infrared+from+the+Lunar+Orbiter+Laser+Altimeter&rft.au=Barker%2C+M+K%3BMazarico%2C+E%3BSun%2C+X%3BNeumann%2C+G+A%3BSmith%2C+D+E%3BZuber%2C+M+T%3BLucey%2C+P+G%3BTorrence%2C+M+H%3BAnonymous&rft.aulast=Barker&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Particle shape characterization of lunar regolith using reflected light microscopy AN - 1765871588; 2016-012084 AB - Automated identification of particles in lunar thin sections is necessary for practical measurement of particle shape, void characterization, and quantitative characterization of sediment fabric. This may be done using image analysis, but several aspects of the lunar regolith make such automations difficult. For example, many of the particles are shattered; others are aggregates of smaller particles. Sieve sizes of the particles span 5 orders of magnitude. The physical thickness of a thin section, at a nominal 30 microns, is large compared to the size of many of the particles. Image acquisition modes, such as SEM and reflected light, while superior to transmitted light, still have significant ambiguity as to the volume being sampled. It is also desirable to have a technique that is inexpensive, not resource intensive, and analytically robust. To this end, we have developed an image acquisition and processing protocol that identifies and delineates resolvable particles on the front surface of a lunar thin section using a petrographic microscope in reflected light. For a polished thin section, a grid is defined covering the entire thin section. The grid defines discrete images taken with 20% overlap, minimizing the number of particles that intersect image boundaries. In reflected light mode, two images are acquired at each grid location, with a closed aperture diaphragm. One image, A, is focused precisely on the front surface of the thin section. The second image, B, is made after the stage is brought toward the objective lens just slightly. A bright fringe line, analogous to a Becke line, appears inside all transparent particles at the front surface of the section in the second image. The added light in the bright line corresponds to a deficit around the particles. Particle identification is done using ImageJ and uses multiple steps. A hybrid 5 X 5 median filter is used to make images Af and Bf. This primarily removes very small particles just below the front surface of the section. Bf-(Bf/Af) is then computed. The division strongly enhances the fringe and the deficit, while minimizing the correlated information in A and B. The subtraction emphasizes the particle-epoxy boundaries. The resulting image is converted to binary, and then holes are filled. Cracks are removed using a median-based operator. JF - American Geophysical Union Fall Meeting AU - McCarty, C B AU - Garcia, G C AU - Rickman, D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P13B EP - 3815 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/1765871588?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+shape+characterization+of+lunar+regolith+using+reflected+light+microscopy&rft.au=McCarty%2C+C+B%3BGarcia%2C+G+C%3BRickman%2C+D%3BAnonymous&rft.aulast=McCarty&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - How to snowboard on Mars AN - 1765871577; 2016-012046 AB - Long, narrow grooves found on the slopes of martian sand dunes have been cited as evidence of liquid water via the hypothesis that melt-water initiated debris flows eroded channels and deposited lateral levees. However, this theory has several short-comings for explaining the observed morphology and activity of these linear gullies. We present an alternative hypothesis that is consistent with the observed morphology, location, and current activity: that blocks of carbon dioxide ice break from over-steepened cornices as sublimation processes destabilize the surface in the spring, and these blocks move downslope, carving out leveed grooves of relatively uniform width and forming terminal pits. To test this hypothesis, we describe experiments involving water and carbon dioxide blocks on terrestrial dunes and then compare results with the martian features. We present a theoretical model of the initiation of block motion due to sublimation and use this to quantitatively compare the expected behavior of blocks on the Earth and Mars. The model demonstrates that carbon dioxide blocks can be expected to move via our proposed mechanism on the Earth and Mars, and the experiments show that the motion of these blocks will naturally create the main morphological features of linear gullies seen on Mars. JF - American Geophysical Union Fall Meeting AU - McElwaine, Jim AU - Diniega, Serina AU - Hansen, C J AU - Bourke, M C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NG13A EP - 01 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/1765871577?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+to+snowboard+on+Mars&rft.au=McElwaine%2C+Jim%3BDiniega%2C+Serina%3BHansen%2C+C+J%3BBourke%2C+M+C%3BAnonymous&rft.aulast=McElwaine&rft.aufirst=Jim&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 - Resource prospector; a lunar volatiles prospecting and ISRU demonstration mission AN - 1765871576; 2016-012056 AB - A variety of recent observations have indicated several possible reservoirs of water and other volatiles. These volatiles, and in particular water, have the potential to be a valuable or enabling resource for future exploration. NASA's Human Exploration and Operations Mission Directorate (HEOMD) Advanced Exploration Systems (AES) is supporting the development of Resource Prospector (RP) to explore the distribution and concentration of lunar volatiles prospecting and to demonstrate In-Situ Resource Utilization (ISRU). The mission includes the RESOLVE (Regolith and Environment Science and Oxygen & Lunar Volatile Extraction) payload, a NASA developed rover, and a lander will most likely be a contributed element by an international partner or the Lunar Cargo Transportation and Landing by Soft Touchdown (CATALYST) initiative. The RESOLVE payload is designed to: (1) locate near-subsurface volatiles, (2) excavate and analyze samples of the volatile-bearing regolith, and (3) demonstrate the form, extractability and usefulness of the materials. RP is being designed with thought given to its extensibility to resource prospecting and ISRU on other airless bodies and Mars. This presentation will describe the Resource Prospector mission, the payload and measurements, and concept of operations. JF - American Geophysical Union Fall Meeting AU - Colaprete, A AU - Elphic, R C AU - Andrews, D R AU - Trimble, J AU - Sanders, J AU - Quinn, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P11D EP - 04 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/1765871576?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Resource+prospector%3B+a+lunar+volatiles+prospecting+and+ISRU+demonstration+mission&rft.au=Colaprete%2C+A%3BElphic%2C+R+C%3BAndrews%2C+D+R%3BTrimble%2C+J%3BSanders%2C+J%3BQuinn%2C+J%3BAnonymous&rft.aulast=Colaprete&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 - Icy satellite science today and in Cassini's final three years AN - 1765871574; 2016-012064 AB - The Cassini Mission has turned our view of Saturn's icy moons from scientific sketches to fully realized worlds. Among the major discoveries are: Activity on Enceladus and associated plumes that originate in small hot spots on its south pole and that appear to be modulated by tidal forces; a liquid subsurface water ocean on Enceladus that is a habitable environment; several new moons; debris rings associated with moons; a unique equatorial ridge on Iapetus; the identity of new constituents on the moons including carbon dioxide ice on most of them and polycyclic aromatic hydrocarbons (PAHs)on Iapetus; differentiated or partially differentiated interiors; nano-iron on the surfaces of the moons and in the rings; volatile segregation on Iapetus and Hyperion; and a bewildering array of geologic processes on the small moons. But our new view of these icy worlds has spawned new questions. Among these unanswered questions are: How variable are the plumes? Have any other moons had activity similar to that on Enceladus and did it continue up to the recent past? How much dust do the moons contribute to the region around Saturn? What caused the ridge on Iapetus? What are the interiors of the moons like? How differentiated and compensated are they? Five additional targeted flybys, two of Dione and three of Enceladus, have been designed to answer these questions and will be implemented during the remainder of the Solstice Mission. The Dione flybys both include gravity passes to determine its state of differentiation. One of the flybys is optimized to measure the fields and particle environment around Dione. One of the two remote-sensing flybys of Enceladus will scrutinize the south polar region to further understand the size, temperature, and variability of the emitting areas, while the other will observe the north pole to determine why it is so different from the south. The third Enceladus flyby involves an unprecedented pass less than 50 km above the surface into the midst of the plume. The spacecraft's daring swoop into the inner parts of the Saturnian system during the F-ring and proximal orbits will bring many of the small inner satellites into clearer focus. Funded by NASA. JF - American Geophysical Union Fall Meeting AU - Buratti, B J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P12A EP - 05 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/1765871574?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Icy+satellite+science+today+and+in+Cassini%27s+final+three+years&rft.au=Buratti%2C+B+J%3BAnonymous&rft.aulast=Buratti&rft.aufirst=B&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 - A review of Phobos surface features AN - 1765871572; 2016-012075 AB - For this research we review the morphology and distribution of craters on Phobos. We describe crater characteristics and ejecta features of the differentiated layers resulting from low-velocity impacts. We compare spacecraft imagery as a technique to determine changes in surface features on Phobos. JF - American Geophysical Union Fall Meeting AU - Smith, H D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P12B 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/1765871572?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+review+of+Phobos+surface+features&rft.au=Smith%2C+H+D%3BAnonymous&rft.aulast=Smith&rft.aufirst=H&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - A decade of Cassini radio science so far, and three spectacular years ahead AN - 1765871570; 2016-012065 AB - Over the past decade, the Cassini RSS (Radio Science Subsystem) instrument has provided fundamental new insights into many aspects of the Saturn system. Taking advantage of the capability to use up to three simultaneous wavelengths (Ka, X, and S bands), a series of occultation experiments of Titan and Saturn have provided detailed vertical profiles of the atmospheric and ionospheric structure, exhibiting seasonal and regional variability. Gravity experiments, conducted during close flybys of Saturn's moons, have yielded information about their internal structure, including evidence of sub-surface oceans on Titan and Enceladus. From dozens of ring occultation experiments, the radial structure, scattering properties, and particle sizes of the rings have been measured to high precision, enabling detailed comparative studies of ring dynamics and orbital characteristics. Recent bistatic observations of Titan, in which the transmitted signal reflects off of the specular point and is received on Earth, have traversed the northern polar regions, crossing the boundaries between seas and land, showing that the surface of the seas is remarkably smooth, and providing information about the dielectric properties of the liquids and surface materials. The best is yet to come, during the final three years of the Cassini mission, when the RSS instrument will observe the rings in a series of occultation measurements at their most favorable geometry of the entire Cassini mission, and a companion set of close fly-bys of Saturn will provide the first detailed determination of Saturn's gravitational field. JF - American Geophysical Union Fall Meeting AU - French, R G AU - Armstrong, J W AU - Flasar, F M AU - Iess, L AU - Kliore, A J AU - Marouf, E A AU - McGhee-French, C AU - Nagy, A F AU - Rappaport, N J AU - Schinder, P J AU - Tortora, P AU - Anabtawi, A AU - Asmar, S W AU - Barbinis, E AU - Fleischman, D U AU - Kahan, D S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P12A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765871570?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+decade+of+Cassini+radio+science+so+far%2C+and+three+spectacular+years+ahead&rft.au=French%2C+R+G%3BArmstrong%2C+J+W%3BFlasar%2C+F+M%3BIess%2C+L%3BKliore%2C+A+J%3BMarouf%2C+E+A%3BMcGhee-French%2C+C%3BNagy%2C+A+F%3BRappaport%2C+N+J%3BSchinder%2C+P+J%3BTortora%2C+P%3BAnabtawi%2C+A%3BAsmar%2C+S+W%3BBarbinis%2C+E%3BFleischman%2C+D+U%3BKahan%2C+D+S%3BAnonymous&rft.aulast=French&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Mapping the vertical structure of the lunar regolith in volcanic regions and at constellation sites AN - 1765871568; 2016-012069 AB - The upper ten meters of the lunar regolith contains stratigraphy that provides geologic insight, and these upper layers are also what future in-situ instruments will interact with. We use a combination of remote sensing data from ground-based radar observations (Arecibo and Green Bank Telescope at wavelengths of 12.6 cm and 70 cm) and the Lunar Reconnaissance Orbiter spacecraft (Diviner, Mini-RF) to determine how the regolith structure varies across volcanic terrains and possible future landing sites. Radar can detect buried units and provide a measure of roughness, while thermal infrared data provides complimentary information on the surface and near-surface rock abundance in the upper centimeters. Radar and infrared wavelengths are also sensitive to different sized rocks, which can be used to determine where there are increased numbers centimeter-sized rocks. A comparison of these data sets reveals significant differences in regolith stratigraphy across targets. For example, small rilles on the Aristarchus Plateau to the northeast of the Constellation Aristarchus 2 site are surrounded by rock-poor deposits and are likely a secondary source of pyroclastic materials. Some rilles, such as Rima Birt, are surrounded by pyroclastics that change in depth and/or embedded rock abundance along the length of the rille. We will present results from our data analysis and subsequent mapping, focusing on rilles, pyroclastic deposits, and Constellation Region of Interest targets including the Apollo sites. JF - American Geophysical Union Fall Meeting AU - Carter, L M AU - Ghent, R R AU - Bandfield, J L AU - Campbell, B A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P12B EP - 02 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/1765871568?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Mapping+the+vertical+structure+of+the+lunar+regolith+in+volcanic+regions+and+at+constellation+sites&rft.au=Carter%2C+L+M%3BGhent%2C+R+R%3BBandfield%2C+J+L%3BCampbell%2C+B+A%3BAnonymous&rft.aulast=Carter&rft.aufirst=L&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Early phases of Jupiter's formation from an evolving disk of solids AN - 1765870390; 2016-014008 AB - We are performing calculations of the formation of Jupiter via core nucleated accretion and gas capture. The calculations model the growth of a solid core from an evolving disk of planetesimals and the growth of a contracting gaseous envelope. We present results of the early phases of formation. The evolution of the solids accounts for growth and fragmentation, viscous and gravitational stirring, and for drag-assisted migration and velocity damping operated by the disk's gas. The envelope structure accounts for mass and energy deposition due to the ablation of planetesimals that move through the envelope. The envelope's opacity takes into account coagulation and sedimentation of dust particles released by ablating planetesimals. The core starts as a seed body of 350 km in radius, orbiting at 5.2 AU in a disk of planetesimals whose initial radii range from 15 m to 50 km. The initial surface density of the solids is 10 g/cm (super 2) at the seed's location. During the evolution of the solids, most of the mass resides in bodies of several tens of km in radius. These are also the planetesimals that provide most of the solids accretion to the planet. By comparing results with a calculation that does not account for the envelope bound to the core, we find that the size-dependent cross-section of the planet for the accretion of planetesimals is substantially enhanced by a low-mass, but voluminous envelope. The calculation without the envelope produces a core of 4.4 Earth masses (Mearth) after about 1 Myr, and an extrapolated mass of about 5 Mearth after 6 Myr. The full calculation with envelope yields a core of 7.3 Mearth and an envelope of 0.15 Mearth after about 0.4 Myr. At this point of the planet's evolution, the envelope accretion rate exceeds that of the core. Over the following 1 Myr, the core mass reaches about 8 Mearth and the envelope mass grows to about 4 Mearth. Support from NASA Outer Planets Research Program is gratefully acknowledged. JF - American Geophysical Union Fall Meeting AU - D'Angelo, Gennaro AU - Weidenschilling, S J AU - Lissauer, J J AU - Bodenheimer, Peter AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51A EP - 3910 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/1765870390?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Early+phases+of+Jupiter%27s+formation+from+an+evolving+disk+of+solids&rft.au=D%27Angelo%2C+Gennaro%3BWeidenschilling%2C+S+J%3BLissauer%2C+J+J%3BBodenheimer%2C+Peter%3BAnonymous&rft.aulast=D%27Angelo&rft.aufirst=Gennaro&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 - MSL DAN passive data and interpretations AN - 1765870381; 2016-014014 AB - In its passive mode of operation, The Mars Science Laboratory Dynamic Albedo of Neutrons experiment (DAN) detects low energy neutrons that are produced by two different sources on Mars. Neutrons are produced by the rover's Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) and by interactions of high energy galactic cosmic rays (GCR) within the atmosphere and regolith. As these neutrons propagate through the subsurface, their energies can be moderated by interactions with hydrogen nuclei. More hydrogen leads to greater moderation (thermalization) of the neutron population energies. The presence of high thermal neutron absorbing elements within the regolith also complicates the spectrum of the returning neutron population, as shown by Hardgrove et al. DAN measures the thermal and epithermal neutron populations leaking from the surface to infer the amount of water equivalent hydrogen (WEH) in the shallow regolith. Extensive modeling is performed using a Monte Carlo approach (MCNPX) to analyze DAN passive measurements at fixed locations and along rover traverse segments. DAN passive WEH estimates along Curiosity's traverse will be presented along with an analysis of trends in the data and a description of correlations between these results and the geologic characteristics of the surfaces traversed. JF - American Geophysical Union Fall Meeting AU - Tate, C G AU - Moersch, J AU - Jun, I AU - Ming, Douglas W AU - Mitrofanov, I G AU - Litvak, M L AU - Behar, Alberto AU - Boynton, W V AU - Drake, D AU - Lisov, D AU - Mischna, Michael A AU - Hardgrove, C J AU - Milliken, Ralph E AU - Sanin, A B AU - Starr, Richard D AU - Martin-Torres, J AU - Zorzano, M P AU - Fedosov, F AU - Golovin, D AU - Harshman, K AU - Kozyrev, A AU - Malakhov, A V AU - Mokrousov, M AU - Nikiforov, S AU - Varenikov, A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51C EP - 3956 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/1765870381?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=MSL+DAN+passive+data+and+interpretations&rft.au=Tate%2C+C+G%3BMoersch%2C+J%3BJun%2C+I%3BMing%2C+Douglas+W%3BMitrofanov%2C+I+G%3BLitvak%2C+M+L%3BBehar%2C+Alberto%3BBoynton%2C+W+V%3BDrake%2C+D%3BLisov%2C+D%3BMischna%2C+Michael+A%3BHardgrove%2C+C+J%3BMilliken%2C+Ralph+E%3BSanin%2C+A+B%3BStarr%2C+Richard+D%3BMartin-Torres%2C+J%3BZorzano%2C+M+P%3BFedosov%2C+F%3BGolovin%2C+D%3BHarshman%2C+K%3BKozyrev%2C+A%3BMalakhov%2C+A+V%3BMokrousov%2C+M%3BNikiforov%2C+S%3BVarenikov%2C+A%3BAnonymous&rft.aulast=Tate&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Evaluation of sedimentary and terrain parameters from MARDI camera imaging and stereogrammetry at Gale crater AN - 1765870317; 2016-013968 AB - The Mars Descent Imager (MARDI) provides mm-resolution imaging of an nearly equal 0.92 m by 0.64 cm patch of the Martian surface beneath the rover. Since Sol 310, MARDI has acquired images under twilight illumination to optimize image quality for quantitative sedimentology analysis. This imaging, carried out after each rover drive, permits systematic measurement of clast size distribution, inter-clast spacing distribution, and surface areal coverage. Sedimentological parameters derived from these observations include clast sorting (mean/var of size) and other characteristics related to transport mechanisms or in-place weathering. Measured surface parameters (e.g., clast sorting) can be correlated with surface units qualitatively defined (e.g., smooth, rocky, outcrop) in images obtained by HiRISE, MSL Mastcam and MSL Navcam. In addition, a preliminary longitudinal analysis has been conducted to examine possible source regions for the bulk of the gravels by correlating sedimentary parameters with distance from either Peace Valles or Mt. Sharp, with evidence of trends associated with inter-clast spacing. Sets of stereo MARDI images that allow the creation of high vertical precision (+ or -2 mm) digital elevation models (DEMs) have also been acquired via two techniques. First, MARDI images taken at each step of comprehensive wheel imaging activities yield 5 MARDI images with nearly equal 50% overlap. Second, two MARDI sidewalk video imaging mode (SVIM) experiments yielded a continuous set of images during a rover drive with 75-82% overlap. DEMs created via either technique can be used to quantify terrain properties and measure clast cross-sectional shapes. The microtopographic properties of the Sol 651 surface (e.g., mean/sigma of local elevation and slopes) and its sub-cm texture as measured in the SVIM-derived DEM are consistent with the characterization of the terrain as smooth with few rocks >20 cm. Characterization of the Sol 691 surface as rockier than the Sol 651 surface is supported by a DEM with larger local slopes at cm scales (mean nearly equal 40 degrees ), slope variances over 20 degrees and cm-scale height variance in excess of 2 cm. Ultimately, the analysis of clast sizes, spatial patterns, areal cover, and 3D shapes is expected to result in the identification of sub-populations, potentially tied to depositional events in the region and their sources. JF - American Geophysical Union Fall Meeting AU - Minitti, M E AU - Garvin, James B AU - Yingst, R A AU - Maki, Justin AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P43D EP - 4016 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/1765870317?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Evaluation+of+sedimentary+and+terrain+parameters+from+MARDI+camera+imaging+and+stereogrammetry+at+Gale+crater&rft.au=Minitti%2C+M+E%3BGarvin%2C+James+B%3BYingst%2C+R+A%3BMaki%2C+Justin%3BAnonymous&rft.aulast=Minitti&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - A diurnal study of lunar topography to determine regolith temperature contributions to the inference of hydrogen volatiles using epithermal neutrons from the Lunar Exploration Neutron Detector (LEND) AN - 1765870187; 2016-014013 AB - In this research we investigate lunar volatiles in the Moon's southern latitudes under diurnal conditions using five years of accumulated epithermal neutron observations by the Lunar Reconnaissance Orbiter's Lunar Exploration Neutron Detector. The primary objective of this research is to determine the spatial extent and magnitude of a possible regolith temperature contribution to the Moon's epithermal leakage flux as a function of topography. Ongoing research has suggested that there exists a widespread preferential bias in hydrogen concentrations towards the Moon's poleward-facing slopes as evidenced by a localized 1-2% suppression of the lunar epithermal leakage flux relative to equivalent equator-facing slopes (McClahanan et al., Under Review 2014). Monte Carlo neutron modeling results by (Lawson et al., 2000; Little et al. 2002) found that the epithermal neutron leakage flux may be slightly enhanced nearly equal 1% with regolith temperature in lunar conditions. Contrasting temperature conditions on poleward-facing and equator-facing slopes may at least partially explain the observation of biased concentrations of hydrogen towards poleward-facing slopes. To isolate any temperature contribution, LEND night observations are mapped and correlated with temperature maps from LRO's Diviner radiometer and terrain and illumination models derived from the Lunar Observing Laser Altimeter. Night and day results are contrasted to illustrate both the magnitude and latitude extent of putative temperature effects and spatial hydrogen distributions. JF - American Geophysical Union Fall Meeting AU - McClanahan, T P AU - Mitrofanov, I G AU - Boynton, W V AU - Chin, Gordon AU - Evans, L G AU - Starr, Richard D AU - Livengood, Timothy A AU - Litvak, M L AU - Sanin, A B AU - Murray, J AU - Parsons, Ann M AU - Su, J J AU - Bodnarik, J AU - Harshman, K AU - Sagdeev, R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract P51C EP - 3955 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/1765870187?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+diurnal+study+of+lunar+topography+to+determine+regolith+temperature+contributions+to+the+inference+of+hydrogen+volatiles+using+epithermal+neutrons+from+the+Lunar+Exploration+Neutron+Detector+%28LEND%29&rft.au=McClanahan%2C+T+P%3BMitrofanov%2C+I+G%3BBoynton%2C+W+V%3BChin%2C+Gordon%3BEvans%2C+L+G%3BStarr%2C+Richard+D%3BLivengood%2C+Timothy+A%3BLitvak%2C+M+L%3BSanin%2C+A+B%3BMurray%2C+J%3BParsons%2C+Ann+M%3BSu%2C+J+J%3BBodnarik%2C+J%3BHarshman%2C+K%3BSagdeev%2C+R%3BAnonymous&rft.aulast=McClanahan&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 - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Lumbar Puncture During Spaceflight: Operational Considerations, Constraints, Concerns, and Limitations AN - 1762367245; PQ0002463196 AB - Lumbar puncture (LP) is a commonly performed low-risk procedure terrestrially, used diagnostically for evaluation of cerebrospinal fluid (CSF) pressure as well as for collection of CSF for analysis. NASA is investigating noninvasive means for measurement of intracranial pressure (ICP) to assess the potential contribution of elevated intracranial pressures to recently reported changes in astronauts' visual acuity and eye anatomy, known collectively as the Visual Impairment/lntracranial Pressure risk. Flowever, many of these noninvasive technologies are still under development, have limited clinical validation, are several years away from being ready for in-flight use, or only provide qualitative rather than quantitative ICP values. Therefore, performance of in-flight LPs, as part of crewmember evaluation, has also been considered by NASA. This manuscript summarizes the unique operational considerations, constraints, concerns, and limitations of using traditional LP as an adjunct or as an alternative to noninvasive ICP measurements during spaceflight. JF - Aviation, Space, and Environmental Medicine AU - Barr, Yael R AD - University of Texas Medical Branch, Galveston, TX; 2101 NASA Johnson Space Center, Houston, TX, yael.barr-1@nasa.gov Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 1209 EP - 1213 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 12 SN - 0095-6562, 0095-6562 KW - Health & Safety Science Abstracts KW - astronauts |a MeSH KW - microgravity |a MeSH KW - intracranial pressure |a MeSH KW - Risk assessment KW - Anatomy KW - Technology KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1762367245?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Lumbar+Puncture+During+Spaceflight%3A+Operational+Considerations%2C+Constraints%2C+Concerns%2C+and+Limitations&rft.au=Barr%2C+Yael+R&rft.aulast=Barr&rft.aufirst=Yael&rft.date=2014-12-01&rft.volume=85&rft.issue=12&rft.spage=1209&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3674.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Number of references - 42 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Risk assessment; Technology; Anatomy DO - http://dx.doi.org/10.3357/ASEM.3674.2014 ER - TY - JOUR T1 - Effects of superthermal electrons in the young Earth atmosphere and its habitability AN - 1761074278; 2016-008775 AB - In this presentation, we use the Fokker-Plank code to model the effect of intensive short-wavelength (X-rays to UV band) emission from the young Sun on Earth's atmosphere. Our simulations include the photoionization processes of the Earth's atmosphere forming a population of superthermal electrons (E<600 eV), the kinetic effects of their propagation associated and their contribution in ionosphere-magnetosphere energy redistribution. We also evaluated associated non-thermal atmospheric mass loss due to induced ambipolar electric field and its effect on the habitability of early Earth. JF - American Geophysical Union Fall Meeting AU - Airapetian, Vladimir AU - Khazanov, George V AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract SM51B EP - 4250 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1761074278?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+superthermal+electrons+in+the+young+Earth+atmosphere+and+its+habitability&rft.au=Airapetian%2C+Vladimir%3BKhazanov%2C+George+V%3BAnonymous&rft.aulast=Airapetian&rft.aufirst=Vladimir&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Merging paleoclimatic reconstructions, observations, and models to refine drought risk assessments AN - 1756509883; 2016-006637 AB - Tree-ring reconstructions of the Palmer Drought Severity Index (PDSI) provide an important estimate of hydroclimate variability over the last several millennia that improve our understanding of regional drought risks and provide a baseline for future drought projections. Merging paleoclimatic information with observational and model data, however, involves important technical considerations associated with data and model uncertainties and the employed drought metric. Here we evaluate the interpretation of different PDSI formulations in various paleoclimatic, observational, and modeling contexts. Potential biases in tree-ring reconstructed PDSI are evaluated using Thorthwaite, Penman-Montieth, and Self-Calibrating Penman-Montieth PDSI as reconstruction targets in three diverse regions of the United States and tree-ring chronologies from the North American Drought Atlas (NADA). Minimal differences are found between the three PDSI reconstructions and all compare favorably to independently reconstructed Thornthwaite-based PDSI from the NADA. Reconstructions also compare well with model-derived estimates of PDSI (Thornthwaite and Penman-Montieth formulations), and near-surface and full-column soil moisture over the 20th century in two collections of model simulations from the Coupled Model Intercomparison Project Phase 5 database. Model-derived Thornthwaite and Penman-Monteith PDSI closely track modeled soil moisture (near-surface and full column) during the 20th century, with differences only emerging in 21st-century projections. These differences confirm the tendency of Thorntwaite-based PDSI to overestimate drying when temperatures exceed the range of its normalization interval; the more physical moisture-balance accounting of Penman-Montieth PDSI compares much better with modeled soil moisture in the projection interval. Remaining regional differences in the secular behavior of projected soil moisture and Penman-Montieth-based PDSI are interpreted in terms of underlying physical processes and temporal sampling. Results demonstrate the continued utility of PDSI as a metric of surface moisture balance and provide a framework for refining assessments of drought risks using a collection of paleoclimatic, observational, and model data. JF - American Geophysical Union Fall Meeting AU - Smerdon, J E AU - Cook, B AU - Cook, E R AU - Seager, R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H33N EP - 03 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/1756509883?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Merging+paleoclimatic+reconstructions%2C+observations%2C+and+models+to+refine+drought+risk+assessments&rft.au=Smerdon%2C+J+E%3BCook%2C+B%3BCook%2C+E+R%3BSeager%2C+R%3BAnonymous&rft.aulast=Smerdon&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-14 N1 - CODEN - #07548 ER - TY - JOUR T1 - Towards a South Asia Land Data Assimilation System; first results for transboundary basins AN - 1756509191; 2016-006647 AB - South Asia faces a remarkably complex and diverse set of hydrologic stresses, including melting glaciers, variable snowpack, intensively utilized transboundary rivers, rapid groundwater depletion due to irrigation, flood and drought hazard, and rapidly changing land use/cover and climate conditions. The management and prediction challenges posed by these conditions are compounded by the sparseness of in situ monitoring sites, particularly in headwaters regions, and a lack of open sharing of hydrometeorological data across national boundaries. As a result, uncertainties in availability in a situation of rising demands are leading to increasing competing and exploitive use of a limited resource, being experienced at various scales. An open water information system for decision support is an absolute necessity. In order to provide an open and spatially complete water information system for decision support across the region, we are implementing a customized Land Data Assimilation System (LDAS) designed to provide best-available estimates of hydrologic states and fluxes across South Asia, both retrospectively and in near-real time. The LDAS merges advanced land surface models with satellite-derived and in situ observations. In the case of South Asia, multiple satellite-derived hydrological fields are relevant to complete water balance analysis, including precipitation from multiple sources (e.g., TRMM, CHIRPS, GPM), water storage anomalies from GRACE, thermal infrared evapotranspiration estimates, and snowpack characteristics from visible and microwave sensors. Each of these observation types can either be ingested to South Asia LDAS or used as an independent observation for comparison. Here we present the first results of this South Asian Land Data Assimilation System, with a focus on complete water balance analysis for selected river basins in South Asia. JF - American Geophysical Union Fall Meeting AU - Zaitchik, B F AU - Ghatak, D AU - Toll, David L AU - Searby, Nancy D AU - Limaye, A S AU - Peters-Lidard, Christa D AU - Bajracharya, B AU - Shrestha, B R AU - Iceland, C AU - Narula, Kapil AU - Lee, Sylvia AU - Mourad, B AU - Doorn, Bradley AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H33P EP - 03 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756509191?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+South+Asia+Land+Data+Assimilation+System%3B+first+results+for+transboundary+basins&rft.au=Zaitchik%2C+B+F%3BGhatak%2C+D%3BToll%2C+David+L%3BSearby%2C+Nancy+D%3BLimaye%2C+A+S%3BPeters-Lidard%2C+Christa+D%3BBajracharya%2C+B%3BShrestha%2C+B+R%3BIceland%2C+C%3BNarula%2C+Kapil%3BLee%2C+Sylvia%3BMourad%2C+B%3BDoorn%2C+Bradley%3BAnonymous&rft.aulast=Zaitchik&rft.aufirst=B&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-14 N1 - CODEN - #07548 ER - TY - JOUR T1 - Satellite observations of the epic California drought AN - 1756509074; 2016-006651 AB - As California enters its third year of drought, questions of future water sustainability are inevitable. Snowpack, soil moisture, streamflow, reservoir and groundwater levels are at record lows. Mandatory water restrictions are being implemented, statewide fines for wasting water have been authorized, and billions of dollars and tens of thousands of jobs have been lost. Enhanced monitoring and modeling of the state's dwindling water supplies can help manage what remains while looking forward to a post-drought, sustainable water future. Here we demonstrate the role of satellite observations in comprehensive drought characterization and monitoring. In particular we highlight changing water supply, declining groundwater and reservoir levels, agricultural and urban stress. Potential contributions to water management will be discussed. JF - American Geophysical Union Fall Meeting AU - Famiglietti, J S AU - Thomas, B F AU - Reager, John T, II AU - Castle, S L AU - David, Cedric H AU - Thomas, A C AU - Andreadis, Konstantinos AU - Argus, Donald F AU - Behrangi, Ali AU - Farr, Thomas AU - Fisher, Josh B AU - Landerer, F W AU - Lo, M H AU - Molotch, Noah P AU - Painter, Thomas H AU - Rodell, Matthew AU - Schimel, David AU - Swenson, S C AU - Watkins, Michael M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H34D 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/1756509074?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Satellite+observations+of+the+epic+California+drought&rft.au=Famiglietti%2C+J+S%3BThomas%2C+B+F%3BReager%2C+John+T%2C+II%3BCastle%2C+S+L%3BDavid%2C+Cedric+H%3BThomas%2C+A+C%3BAndreadis%2C+Konstantinos%3BArgus%2C+Donald+F%3BBehrangi%2C+Ali%3BFarr%2C+Thomas%3BFisher%2C+Josh+B%3BLanderer%2C+F+W%3BLo%2C+M+H%3BMolotch%2C+Noah+P%3BPainter%2C+Thomas+H%3BRodell%2C+Matthew%3BSchimel%2C+David%3BSwenson%2C+S+C%3BWatkins%2C+Michael+M%3BAnonymous&rft.aulast=Famiglietti&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-14 N1 - CODEN - #07548 ER - TY - JOUR T1 - The GRACE mission status and future activities AN - 1752578851; 2016-001157 AB - The twin satellites of the Gravity Recovery and Climate Experiment (GRACE) were launched on March 17, 2002 and have operated continuously for almost 13 years. During this time, the results from the mission have been used to support a wide range of contemporary studies of Earth System Dynamics. The mission objectives are to sense the spatial and temporal variations of the Earth's mass through its effects on the gravity field at the GRACE satellite altitude. The primary mission objectives of GRACE are to measure: 1) the Earth's time-averaged gravity field over the mission life and 2) the monthly variations in the mean gravity field at wave lengths between 200 and 4000 km. The major cause of the time varying mass is water motion and the GRACE mission has provided a continuous decade long measurement sequences which characterizes the seasonal exchange of mass between the oceans, land, cryosphere and atmosphere; its inter-annual variability; and the climate driven secular, or long period, mass transport signals. Measurements of continental aquifer mass change, polar ice mass change and ocean bottom currents are examples of paradigm shifting remote sensing observations enabled by the GRACE satellite measurements. In 2012, a complete reanalysis of the mission data, referred to as the RL05 data release, was initiated. The monthly solutions from this effort were released in mid-2013 and have been applied in numerous science and application related investigations. The RL05 mean and combined models, involving the GRACE/GOCE data combinations, are still in development. This presentation will describe the current mission status and operations activities, which are focused on extending the mission lifetime, review some of the science improvements from the RL05 data release and describe the status and remaining tasks to complete the solution. JF - American Geophysical Union Fall Meeting AU - Tapley, B D AU - Flechtner, F AU - Bettadpur, S V AU - Watkins, M M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G23C EP - 03 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/1752578851?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+GRACE+mission+status+and+future+activities&rft.au=Tapley%2C+B+D%3BFlechtner%2C+F%3BBettadpur%2C+S+V%3BWatkins%2C+M+M%3BAnonymous&rft.aulast=Tapley&rft.aufirst=B&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 - Time-variable gravity solutions from 1993 to 2013 from SLR and DORIS data AN - 1752578422; 2016-001140 AB - The GRACE mission has been highly successful in determining the time-variable gravity field of the Earth, producing monthly or even more frequent solutions (cf. 10-day) solutions using both spherical harmonics and mascons. However the GRACE time series only commences in 2002-2003 and a gap of several years may occur in the series before a GRACE follow-on satellite is launched. Satellites tracked by SLR and DORIS have also been used to study time variations in the Earth's gravitational field. In this paper we discuss the development of a new time series of low degree spherical harmonic fields based on the available SLR, DORIS data. We have developed solutions to 5 X 5 in spherical harmonics based on data from up to 18 satellites tracked with SLR and DORIS data. (i.e. Lageos1, Lageos2, Starlette, Stella, Ajisai, Lares, Blits, Larets, Westpac, TOPEX/Poseidon, Envisat, Cryosat-2, Jason-2, SPOT-2, SPOT-3, SPOT-4 and Etalon1 and Etalon2). The new solutions are consistent with the IERS2010 standards with respect to the mean pole and the definition of C21 and S21. We discuss the quality of these solutions, the contribution of the various satellites. We have applied this time series to the computation of orbits for TOPEX/Poseidon, Jason-1, & Jason-2 and to the reprocessing of DORIS data for the NASA GSFC submission to ITRF2013 (series gscwd25 and gscwd26). We discuss the derivation of these solutions and their evaluation, including their comparison with other solutions, such as those derived from GRACE data. JF - American Geophysical Union Fall Meeting AU - Lemoine, F G AU - Chinn, D S AU - Zelensky, N P AU - Beall, J W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G23A EP - 0472 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/1752578422?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Time-variable+gravity+solutions+from+1993+to+2013+from+SLR+and+DORIS+data&rft.au=Lemoine%2C+F+G%3BChinn%2C+D+S%3BZelensky%2C+N+P%3BBeall%2C+J+W%3BAnonymous&rft.aulast=Lemoine&rft.aufirst=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 - High-resolution global and local lunar gravity field models using GRAIL mission data AN - 1752577651; 2016-001121 AB - The Gravity Recovery and Interior Laboratory (GRAIL) spacecraft was designed to map the structure of the Moon through high-precision global gravity mapping. The mission consisted of two spacecraft with Ka-band inter-satellite tracking complemented by tracking from Earth. The mission had two phases: (1) a primary mapping mission from March 1 until May 29, 2012 at an average altitude of 50 km; (2) an extended mission from August 30 until December 14, 2012, with an average altitude of 23 km before November 18, and between 11-20 km through December 14. Both the primary and the extended mission data have been processed into global models of the lunar gravity field at NASA/GSFC using the GEODYN software. Here we present our latest global model, an expansion in spherical harmonics of degree and order 1080. We discuss this new solution in terms of its power spectrum, its free-air and Bouguer anomalies, its associated error spectrum, and its correlations with topography-induced gravity. In addition to global models we also estimated local gravity adjustments in areas of particular interest such as Mare Orientale and the South Pole area. We express gravity in terms of anomalies, and estimate them with respect to a global background model. We apply neighbor-smoothing in our estimation procedure. We present a local solution over the south pole area in a resolution of 1/6 by 1/6 of a degree, equivalent to degree and order 1080, and we compare this local solution to our global model. JF - American Geophysical Union Fall Meeting AU - Goossens, S J AU - Lemoine, F G AU - Sabaka, T J AU - Nicholas, J B AU - Mazarico, E AU - Rowlands, D D AU - Neumann, G A AU - Loomis, B AU - Chinn, D S AU - Smith, D E AU - Zuber, M T AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G22A EP - 02 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/1752577651?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+global+and+local+lunar+gravity+field+models+using+GRAIL+mission+data&rft.au=Goossens%2C+S+J%3BLemoine%2C+F+G%3BSabaka%2C+T+J%3BNicholas%2C+J+B%3BMazarico%2C+E%3BRowlands%2C+D+D%3BNeumann%2C+G+A%3BLoomis%2C+B%3BChinn%2C+D+S%3BSmith%2C+D+E%3BZuber%2C+M+T%3BAnonymous&rft.aulast=Goossens&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Preliminary results of the 2013-2014 Sabancaya, Peru earthquakes from COSMO-skymed satellite constellation InSAR time-series AN - 1752577478; 2016-001176 AB - We examine an earthquake series in southern Peru that features a complex interaction of main- and after-shocks located in an active volcanic zone. The earthquakes started with the 17 July 2013 Mw 5.9 and 24 July 2013 Mw 4.0 earthquakes north-west 20 km NW of active Sabancaya volcano in the Andean Central volcanic Zone of Peru. During this time interval Sabancaya Volcano experienced a strong seismic swarm, fumarole activity and earthquakes possibly related to fracturing of rock and fluid movements.We analyze satellite InSAR data from the Italian Space Agency (ASI) COSMO-SkyMed (CSK) constellation and airborne InSAR data from the NASA UAVSAR. CSK provides a dense InSAR time series that track deformation from 2013 through 2014. Thanks to the short repeat interval of the CSK constellation we are able to discriminate between different earthquakes, aftershocks and post seismic processes leading to a better constraint of the sources. The initial coseismic interferograms from CSK provide a stunningly detailed image of the fault deformation, due in part to the high resolution, short wavelength (3.1 cm) of CSK, and the high coherence, and high elevation of the location. For such a relatively small earthquake there is significant shallow fault complexity and surface breaks evident. We found that post-seismic deformation starts immediately following the 17 July main event and is still ongoing. The post seismic deformation measured by the CSK InSAR time series shows a logarithmic time dependency for the southern part of the fault involved in the July 17 earthquake. Using a non-linear least squares approach we found a characteristic time constant of approximately 0.5 years. We found complex co-seismic and persistent post seismic deformation northeast of Sabancaya Volcano possibly related to the complex fault system. To model the coseismic fault geometry and fault slip distribution we use a Bayesian method to solve for the basic fault geometry. This model forms the basis for a detailed constrained least-squares fault slip model whose geometry is constrained by fault surface breaks. The detailed model forms the starting solution for a Bayesian slip inversion based on the full data and model covariance. Finally, we will assess the occurrence of these events in relation to changes in volcanic activity at nearby Sabancaya Volcano. JF - American Geophysical Union Fall Meeting AU - Milillo, P AU - Lundgren, P AU - Jolivet, R AU - Simons, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G31A EP - 0390 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577478?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Preliminary+results+of+the+2013-2014+Sabancaya%2C+Peru+earthquakes+from+COSMO-skymed+satellite+constellation+InSAR+time-series&rft.au=Milillo%2C+P%3BLundgren%2C+P%3BJolivet%2C+R%3BSimons%2C+M%3BAnonymous&rft.aulast=Milillo&rft.aufirst=P&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 - Evaluating recharge estimates of three LSMs across the Western U.S. AN - 1752577218; 2016-001390 AB - Groundwater is a major source of water in the Western U.S. Aquifer systems in this region depend on variable recharge rates influenced by local climatology, vegetation, soils, and geology. There are limited recharge estimates in this region due to the complexity of recharge processes and limited observations. Reliable recharge estimates are important for management of these aquifer systems in response to projected increases in population, land use and climate changes. Several Land Surface Models (LSMs) have been developed over the last few decades to better represent the land surface and atmospheric processes aimed at improving the estimates of various water, energy and carbon fluxes. The complexity of these LSMs varies in simulating exchanges of energy, mass, and momentum between the land surface and overlying atmosphere. In this study, simulations of three LSMs (Noah, Mosaic and VIC) obtained from North American Land Data Assimilation System (NLDAS) are used for assessing recharge estimates across the Western U.S.. Modeled recharge was then compared with published recharge estimates for several aquifers in the region. Mosaic consistently generated higher evapotranspiration compared to Noah and VIC, thereby generating lower recharge. Estimates of recharge from Noah and VIC were similar to each other. While the average annual recharge values varied between the models, the models were consistent in identifying high and low recharge areas in the region. For an average annual precipitation ranging between 58-5051 mm across the Western U.S., the estimated average annual recharge ranged between 0-3479 mm based on Mosaic, 0-4128 mm based on Noah and, 0-2209 mm based on VIC simulations. Annual recharge to precipitation ratios across the study basins, varied from 0.04-3.3% based on Mosaic; 4.3-35.5% based on Noah; and 3.9-24.3 % based on VIC simulations. Models tend to agree in seasonality of recharge occurring dominantly during the spring across the region. Our results highlight that LSMs have the potential to capture the spatial and temporal patterns of recharge at large scales; however more observational studies are required for improved parameterization. JF - American Geophysical Union Fall Meeting AU - Niraula, R AU - Meixner, T AU - Ajami, H AU - Rodell, M AU - Gochis, D J AU - Castro, C L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H31A EP - 0581 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577218?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+recharge+estimates+of+three+LSMs+across+the+Western+U.S.&rft.au=Niraula%2C+R%3BMeixner%2C+T%3BAjami%2C+H%3BRodell%2C+M%3BGochis%2C+D+J%3BCastro%2C+C+L%3BAnonymous&rft.aulast=Niraula&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Two decades of ice melt reconstruction in Greenland and Antarctica from time-variable gravity AN - 1752577185; 2016-001117 AB - In this study, we present a record of ice-sheet melt derived from space-borne gravity that spans over two decades-beyond the time-frame of the GRACE mission. GRACE fields are merged with conventional tracking data (SLR/DORIS) spanning 1992 to the present. They are provided as weekly global fields of degree and order five without C50 and S50 but with C61 and S61. Their multi-decade timespan complements the monthly fields of GRACE of degree and order 60 that start in 2003 and will end when the GRACE mission terminates. The two datasets are combined via an empirical orthogonal function analysis, whereby the conventional tracking data temporal modes are obtained by fitting the SLR/DORIS coefficients to the GRACE spatial modes via linear least squares. Combining those temporal modes with GRACE spatial modes yields the reconstructed global gravity fields. The error budget of the reconstructions is composed of three components: the SLR/DORIS covariances, the errors estimated from the assumption that GRACE spatial modes can be mapped over the SLR/DORIS timeframe, and the covariances from the least squares fit applied to obtain the SLR/DORIS temporal modes. The reconstructed surface mass changes in Greenland and Antarctica, predominantly captured in the first mode, show a rate of mass loss that is increasing since 1992. The trend of mass changes in Greenland over various epochs match with an overarching study assembling altimetry, gravimetry, and interferometry estimates of ice-sheet balance over a 1992-2011 time-frame [Shepherd et al., 2012]. Antarctica shows a trend that is different because of updated GIA models [A et al., 2013] compared to the other studies. We will also show regional mass changes over various other basins, as well as the influence of each SLR/DORIS coefficient on the reconstructions. The consistency of these results underscores the possibility of using low-resolution SLR/DORIS time-variable gravity solutions as a way to continuously monitor the behavior of the polar ice-sheets in the absence of GRACE. Shepherd, A., et al. (2012), Science 338, 1183. A, G., J. Wahr, and S. Zhong (2013), GJI 192, 557. JF - American Geophysical Union Fall Meeting AU - Talpe, M AU - Nerem, R S AU - Lemoine, F G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G21C EP - 02 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/1752577185?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+decades+of+ice+melt+reconstruction+in+Greenland+and+Antarctica+from+time-variable+gravity&rft.au=Talpe%2C+M%3BNerem%2C+R+S%3BLemoine%2C+F+G%3BAnonymous&rft.aulast=Talpe&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 - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - A new global time-variable gravity mascon solution; signal and error analysis AN - 1752577062; 2016-001138 AB - The latest time-variable global gravity mascon solution product from the NASA Goddard Space Flight Center is described and analyzed. This most recent solution is estimated directly from the reduction of the GRACE L1B RL2 data with an optimized set of arc parameters and the full noise covariance. The mascons are estimated monthly with 1-arc-degree equal-area sampling where anisotropic spatial constraints are applied to maximize the recovery of signal while minimizing noise and signal leakage across the geographic constraint region boundaries. Analysis of the solution signals and errors is presented at global and regional scales and comparisons to the GRACE project solutions and independent models are presented. Time series of cryospheric and hydrologic regions are analyzed with the complete Ensemble Empirical Mode Decomposition (EEMD) with adaptive noise algorithm, which adaptively sifts the signal into intrinsic frequency-ordered modes. Lastly, the impact of different solution components is discussed. JF - American Geophysical Union Fall Meeting AU - Loomis, B AU - Luthcke, S B AU - Sabaka, T J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G23A EP - 0470 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577062?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+new+global+time-variable+gravity+mascon+solution%3B+signal+and+error+analysis&rft.au=Loomis%2C+B%3BLuthcke%2C+S+B%3BSabaka%2C+T+J%3BAnonymous&rft.aulast=Loomis&rft.aufirst=B&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 - Earth time variable gravity from a spaceborne cold atom gravity gradiometer AN - 1752577038; 2016-001161 AB - A gradiometer sensor based on the light-pulse atom (LPA) interferometry provides a technological path forward to significantly improve Earth time variable gravity observations from space. The development of a Cold Atom Gravity Gradiometer (CAGG) instrument for geodesy, based on the LPA measurement approach, was recently selected for funding under NASA's Earth Science Technology Office (ESTO) Instrument Incubator Program (IIP). The CAGG IIP development includes the design, build and testing of a high-performance, single-tensor-component gravity gradiometer applicable to Earth science studies on a satellite platform in low-Earth orbit. The gradiometer has a target gravity gradient noise floor of 7X10-5 E/Hz1/2 when extrapolated to operation in a low-noise microgravity environment. This is an improvement over the noise performance of ESA's Gravity field and steady-state Ocean Circulation Explorer (GOCE) gradiometers, whose short-term noise is approximately 3X10-3 E/Hz1/2. In contrast to NASA's Gravity Recovery and Climate Experiment (GRACE) mission, the instrument will be capable of high-precision geodesy from a single satellite platform. In contrast to previous gradiometers based on atom interferometry, the proposed instrument achieves orders-of-magnitude improvements in sensitivity by exploiting the advantages of the microgravity environment. The sensor incorporates an intrinsic method of compensation for rotation-induced errors in the gravity gradient measurement. We present the current status of the CAGG IIP development. We also present the current measurement performance estimate of the CAGG and the simulated performance of the space-based CAGG instrument in recovering Earth time variable gravity. We explore the accuracy, and spatial and temporal resolution of surface mass change observations from several space-based implementations of the CAGG instrument, including various orbit configurations and multi-satellite/multi-orbit configurations. JF - American Geophysical Union Fall Meeting AU - Luthcke, S B AU - Saif, B AU - Black, A AU - Rowlands, D D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G23C EP - 07 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/1752577038?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+time+variable+gravity+from+a+spaceborne+cold+atom+gravity+gradiometer&rft.au=Luthcke%2C+S+B%3BSaif%2C+B%3BBlack%2C+A%3BRowlands%2C+D+D%3BAnonymous&rft.aulast=Luthcke&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Structure of the Moon's Orientale Basin from gravity recovery and interior laboratory (GRAIL) observations AN - 1752577035; 2016-001124 AB - The Gravity Recovery and Interior Laboratory (GRAIL), a dual-spacecraft, gravity-mapping mission that is a component of NASA's Discovery Program, successfully concluded its Primary and Extended Missions, mapping the lunar gravity field from average altitudes of 55 km and 22.5 km, respectively. The mission is currently in its science analysis phase. During the final weeks (the "endgame") of the mapping mission, the orbital altitudes of the two spacecraft were lowered to an average of 11 km above the lunar surface. The endgame mapping strategy was designed to provide the highest-resolution coverage over the Orientale Basin, to be used to develop a gravity map of a multi-ring impact basin at unprecedented resolution. In order to achieve the highest-resolution gravitational model of Orientale, we performed a short-arc analysis of GRAIL's Ka-band range rate (KBRR) observations by adjusting a priori field GRGM900A while embedding neighbor smoothing. The combination of a spherical harmonic solution and the local analysis resolves the gravitational structure of Orientale and its environs to 3-5 km, suitable for detailed investigations of basin structure and evolution. The map reveals a correspondence of the inner depression with an excavation cavity that reflects removal of approximately 30 km of crust. The crustal thickness beneath the basin cavity may be as little as 6 km, depending on assumptions regarding the global mean thickness of the crust, the densities of the crust and mantle, and the thickness and density of the impact melt and mare fill. An annulus of negative free-air anomalies is strongest between the Inner and Outer Rook Mountains and is likely due in part to an annulus of thickened crust surrounding the excavation cavity, most likely caused by the crustal overturn during excavation (as suggested by hydrocode models). Gravitational signatures of basin rings are well resolved and distinctive, reflecting substantial fracturing or porosity as well as evidence for localized magmatic intrusion. There is no preserved evidence, however, for a transient cavity that correlates with any of the basin rings. A record of the energetics of this and other impacts is preserved in the excavated volume, the fractured crust and ring structures. JF - American Geophysical Union Fall Meeting AU - Zuber, M T AU - Smith, D E AU - Goossens, S J AU - Asmar, S W AU - Konopliv, A S AU - Lemoine, F G AU - Melosh, J, IV AU - Neumann, G A AU - Phillips, R J AU - Solomon, S C AU - Watkins, M M AU - Wieczorek, M A AU - Andrews-Hanna, J C AU - Head, J W, III AU - Kiefer, W S AU - McGovern, P J, Jr AU - Nimmo, F AU - Soderblom, J M AU - Taylor, J AU - Johnson, B C AU - Mazarico, E AU - Miljkovic, K AU - Park, R S AU - Yuan, D N AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G22A EP - 05 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/1752577035?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+of+the+Moon%27s+Orientale+Basin+from+gravity+recovery+and+interior+laboratory+%28GRAIL%29+observations&rft.au=Zuber%2C+M+T%3BSmith%2C+D+E%3BGoossens%2C+S+J%3BAsmar%2C+S+W%3BKonopliv%2C+A+S%3BLemoine%2C+F+G%3BMelosh%2C+J%2C+IV%3BNeumann%2C+G+A%3BPhillips%2C+R+J%3BSolomon%2C+S+C%3BWatkins%2C+M+M%3BWieczorek%2C+M+A%3BAndrews-Hanna%2C+J+C%3BHead%2C+J+W%2C+III%3BKiefer%2C+W+S%3BMcGovern%2C+P+J%2C+Jr%3BNimmo%2C+F%3BSoderblom%2C+J+M%3BTaylor%2C+J%3BJohnson%2C+B+C%3BMazarico%2C+E%3BMiljkovic%2C+K%3BPark%2C+R+S%3BYuan%2C+D+N%3BAnonymous&rft.aulast=Zuber&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 - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hydrogeologic aspects of GRACE modeling; a case study of the upper Mississippi Basin AN - 1752576529; 2016-001433 AB - Gravity Recovery and Climate Experiment (GRACE) modeling is an emerging field in hydrology. Investigation of groundwater change using remote sensing data helps overcome data limitation at a global and regional scale. However, its application to regional or local scale hydrogeologic settings has been limited, especially for the use of the publically available Level 3 data. We conducted a study to estimate the change of groundwater using remotely sensed GRACE and ground truth data for the Upper Mississippi Basin in the US. The modeling conditions that affect the model accuracy are soil moisture models, groundwater fluctuations in the monitoring wells, and the hydrogeologic conditions of the aquifer. We adopted three different land surface models for soil moisture: CLM (Common Land Model), Noah, and Mosaic. The ground truth data from monitoring wells were obtained from the USGS National Water Information System. The results showed that the best-fit soil moisture model is CLM. The correlation coefficient is 86.1%, which signifies strong correlation between remote sensed and ground truth data. As for the effect of aquifer, the best selection of well observations is when the groundwater data is collected from the sand and gravel aquifer. Correlation with well observations in sand and gravel aquifers were 73.4%. The best-fit condition is therefore when the CLM was adopted for soil moisture in the GRACE calculation as well as 11 well observations from the sand and gravel aquifer used for the ground-truth calculation. Under the best-fit conditions, the correlation coefficient between the GRACE and the ground truth is 91.8%. JF - American Geophysical Union Fall Meeting AU - Skaskevych, A AU - Lee, J AU - Policelli, Fritz S AU - Bolten, John D AU - David, John L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H41E EP - 0880 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576529?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hydrogeologic+aspects+of+GRACE+modeling%3B+a+case+study+of+the+upper+Mississippi+Basin&rft.au=Skaskevych%2C+A%3BLee%2C+J%3BPolicelli%2C+Fritz+S%3BBolten%2C+John+D%3BDavid%2C+John+L%3BAnonymous&rft.aulast=Skaskevych&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 - Towards a next generation gravity field mission AN - 1752576154; 2016-001162 AB - The last several years have seen different international groups conducting studies of the predicted performance of various mission architectures dedicated to measuring time variable gravity. The broad interest in this topic led to the formation of the Inter-agency Gravity Science Working Group (IGSWG), a joint collaboration between NASA and ESA. In this talk, we will provide status updates for ongoing activities on both sides of the Atlantic within, and external to, the IGSWG. We will discuss the most promising concepts in some detail, and the expected scientific improvements relative to GRACE. Additionally, we will compare the improvements realized with these "next-generation" architectures with what might be gained using a single-pair concept with a set of near-optimal constraints to remove correlated error, such as is implemented in the JPL RL05M GRACE mascon solutions. JF - American Geophysical Union Fall Meeting AU - Wiese, D N AU - Bettadpur, S V AU - Gruber, T AU - Visser, P N AU - Watkins, M M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G23C 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/1752576154?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+next+generation+gravity+field+mission&rft.au=Wiese%2C+D+N%3BBettadpur%2C+S+V%3BGruber%2C+T%3BVisser%2C+P+N%3BWatkins%2C+M+M%3BAnonymous&rft.aulast=Wiese&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 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 - The NASA applied science program disasters area; disaster applications research and response AN - 1739086905; 2015-114457 AB - The goal of the Natural Disaster Application Area is to use NASA's capabilities in spaceborne, airborne, surface observations, higher-level derived data products, and modeling and data analysis to improve natural disaster forecasting, mitigation, and response. The Natural Disaster Application Area applies its remote sensing observations, modeling and analysis capabilities to provide hazard and disaster information where and when it is needed. Our application research activities specifically contribute to 1) Understanding the natural processes that produce hazards, 2) Developing hazard mitigation technologies, and 3)Recognizing vulnerability of interdependent critical infrastructure. The Natural Disasters Application area selects research projects through a rigorous, impartial peer-review process that address a broad spectrum of disasters which afflict populations within the United States, regionally and globally. Currently there are 19 active projects in the research portfolio which address the detection, characterization, forecasting and response to a broad range of natural disasters including earthquakes, tsunamis, volcanic eruptions and ash dispersion, wildfires, hurricanes, floods, tornado damage assessment, oil spills and disaster data mining. The Disasters team works with federal agencies to aid the government in meeting the challenges associated with natural disaster response and to transfer technologies to agencies as they become operational. Internationally, the Disasters Area also supports the Committee on Earth Observations Working Group on Disasters, and the International Charter on Space and Disasters to increase, strengthen, and coordinate contributions of NASA Earth-observing satellites and applications products to disaster risk management. The CEOS group will lead pilot efforts focused on identifying key systems to support flooding, earthquake, and volcanic events. JF - American Geophysical Union Fall Meeting AU - Murray, J J AU - Lindsay, Francis AU - Stough, Timothy AU - Jones, Cathleen AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH11B EP - 3710 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/1739086905?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+NASA+applied+science+program+disasters+area%3B+disaster+applications+research+and+response&rft.au=Murray%2C+J+J%3BLindsay%2C+Francis%3BStough%2C+Timothy%3BJones%2C+Cathleen%3BAnonymous&rft.aulast=Murray&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 - UAVSAR and TerraSAR-X based InSAR detection of localized subsidence in the New Orleans area AN - 1739085740; 2015-114411 AB - Vulnerability of the US Gulf coast to inundation has received increased attention since hurricanes Katrina and Rita. Compounding effects of sea level rise, wetland loss, and regional and local subsidence makes flood protection a difficult challenge, and particularly for the New Orleans area. Key to flood protection is precise knowledge of elevations and elevation changes. Analysis of historical and continuing geodetic measurements show surprising complexity, including locations subsiding more rapidly than considered during planning of hurricane protection and coastal restoration projects. Combining traditional, precise geodetic data with interferometric synthetic aperture radar (InSAR) observations can provide geographically dense constraints on surface deformation. The Gulf Coast environment is challenging for InSAR techniques, especially with systems not designed for interferometry. We use two InSAR capable systems, the L-band (24 cm wavelength) airborne JPL/NASA UAVSAR, and the DLR/EADS Astrium spaceborne TerraSAR X-band (3 cm wavelength), and compare results. First, we are applying pair-wise InSAR to the longer wavelength UAVSAR data to detect localized elevation changes potentially impacting flood protection infrastructure from 2009-2014. We focus on areas on and near flood protection infrastructure to identify changes indicative of subsidence, structural deformation, and/or seepage. The Spaceborne TerraSAR X-band SAR system has relatively frequent observations, and dense persistent scatterers in urban areas, enabling measurement of very small displacements. We compare L-band UAVSAR results with permanent scatterer (PS-InSAR) and Short Baseline Subsets (SBAS) interferometric analyses of a stack composed by 28 TerraSAR X-band images acquired over the same period. Thus we can evaluate results from the different radar frequencies and analyses techniques. Preliminary results indicate subsidence features potentially of a variety of causes, including ground water pumping to post recent construction ground compaction. Our overall goal is to enable incorporation of InSAR into the decision making process via identification and delineation of areas of persistent subsidence, and provide input to improve monitoring and planning in flood risk areas. JF - American Geophysical Union Fall Meeting AU - Blom, Ronald G AU - An, Karen AU - Jones, Cathleen E AU - Latini, Daniele AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H31L EP - 03 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/1739085740?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=UAVSAR+and+TerraSAR-X+based+InSAR+detection+of+localized+subsidence+in+the+New+Orleans+area&rft.au=Blom%2C+Ronald+G%3BAn%2C+Karen%3BJones%2C+Cathleen+E%3BLatini%2C+Daniele%3BAnonymous&rft.aulast=Blom&rft.aufirst=Ronald&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 - Energy and heat transport constraints on tropical climates of the Sturtian Snowball Earth AN - 1739085724; 2015-114705 AB - It remains uncertain whether the maximum extent of Neoproterozoic Snowball Earth glaciations involves total sea ice coverage or significant open ocean. Models disagree, and the geologic record is inconclusive, but a resolution to this key question has important ramifications for how climate processes function at extremes, as well as for the distribution of habitable space for nascent multicellular life. Here we report results of new Sturtian (ca 715 Ma) Snowball Earth simulations that explore the response to three primary climate forcings often cited as contributing to Neoproterozoic cold climates: a continent distribution in low to mid-latitudes, a reduction in solar input (-6.19%), and lowered atmospheric CO2 (40 ppm). The simulations use the latest GISS ModelE2-R, with a coupled dynamic ocean using a 2 degrees X2.5 degrees atmosphere and 1 degrees X1.25 degrees ocean resolution. The GCM includes dynamic sea ice, an improved ocean mixing scheme, and continental runoff directed via a river drainage scheme. The GCM responds rapidly to the extreme forcings, and within 300 years the sea ice front reaches the subtropics, but after 1000 years the sea ice extent remains stable near 30 degrees latitude, despite global average surface air temperatures dropping to -12 degrees C. Tropical sea surface temperatures are above 5 degrees C and nearly half the ocean surface area remains ice-free. This result differs from published results using CCSM4, but is consistent with previous NASA GCMs. Examining the tropical energy fluxes and heat transports from both atmosphere and oceans shows that for the GISS model, increases in tropical sea ice would require higher surface albedos, stronger poleward heat transports, or a reduced greenhouse effect. Atmospheric composition and cloud forcing are likely sources of this major difference in response amongst the newest versions of these IPCC models. Tropical cloud forcing must be a major suspect, since it also differs dramatically among IPCC models for future climate. We continue to stress that our "slushball" solution can readily accommodate the geological record of Neoproterozoic glacial activity, as well as the ecological space needed for the development of complex life. JF - American Geophysical Union Fall Meeting AU - Sohl, L E AU - Chandler, M A AU - Jonas, Jeffrey A AU - Rind, D H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP43C EP - 1487 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085724?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Energy+and+heat+transport+constraints+on+tropical+climates+of+the+Sturtian+Snowball+Earth&rft.au=Sohl%2C+L+E%3BChandler%2C+M+A%3BJonas%2C+Jeffrey+A%3BRind%2C+D+H%3BAnonymous&rft.aulast=Sohl&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 - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - An information architect's view of Earth observations for disaster risk management AN - 1739085358; 2015-114456 AB - Satellite observations play a significant role in supporting disaster response and risk management, however data complexity is a barrier to broader use especially by the public. In December 2013 the Committee on Earth Observation Satellites Working Group on Information Systems and Services documented a high-level reference model for the use of Earth observation satellites and associated products to support disaster risk management within the Global Earth Observation System of Systems context. The enterprise architecture identified the important role of user access to all key functions supporting situational awareness and decision-making. This paper focuses on the need to develop actionable information products from these Earth observations to simplify the discovery, access and use of tailored products. To this end, our team has developed an Open GeoSocial API proof-of-concept for GEOSS. We envision public access to mobile apps available on smart phones using common browsers where users can set up a profile and specify a region of interest for monitoring events such as floods and landslides. Information about susceptibility and weather forecasts about flood risks can be accessed. Users can generate geo-located information and photos of local events, and these can be shared on social media. The information architecture can address usability challenges to transform sensor data into actionable information, based on the terminology of the emergency management community responsible for informing the public. This paper describes the approach to collecting relevant material from the disasters and risk management community to address the end user needs for information. The resulting information architecture addresses the structural design of the shared information in the disasters and risk management enterprise. Key challenges are organizing and labeling information to support both online user communities and machine-to-machine processing for automated product generation. JF - American Geophysical Union Fall Meeting AU - Moe, Karen AU - Evans, John AU - Cappelaere, P G AU - Frye, Stuart W AU - Mandl, Daniel AU - Dobbs, Kevin AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH11B EP - 3708 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/1739085358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+information+architect%27s+view+of+Earth+observations+for+disaster+risk+management&rft.au=Moe%2C+Karen%3BEvans%2C+John%3BCappelaere%2C+P+G%3BFrye%2C+Stuart+W%3BMandl%2C+Daniel%3BDobbs%2C+Kevin%3BAnonymous&rft.aulast=Moe&rft.aufirst=Karen&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 - Time-transfer experiments between satellite laser ranging ground stations via one-way laser ranging to the Lunar Reconnaissance Orbiter AN - 1739085260; 2015-116760 AB - Satellite laser ranging (SLR) has long been used to measure the distance from a ground station to an Earth-orbiting satellite in order to determine the spacecraft position in orbit, and to conduct other geodetic measurements such as plate motions. This technique can also be used to transfer time between the station and satellite, and between remote SLR sites, as recently demonstrated by the Time Transfer by Laser Link (T2L2) project by the Centre National d'Etudes Spatiaes (CNES) and Observatoire de la Cote d'Azur (OCA) as well as the Laser Time Transfer (LTT) project by the Shanghai Astronomical Observatory, where two-way and one-way measurements were obtained at the same time. Here we report a new technique to transfer time between distant SLR stations via simultaneous one-way laser ranging (LR) to the Lunar Reconnaissance Orbiter (LRO) spacecraft at lunar distance. The major objectives are to establish accurate ground station times and to improve LRO orbit determination via these measurements. The results of these simultaneous LR measurements are used to compare the SLR station times or transfer time from one to the other using times-of-flight estimated from conventional radio frequency tracking of LRO. The accuracy of the time transfer depends only on the difference of the times-of-flight from each ground station to the spacecraft, and is expected to be at sub-nano second level. The technique has been validated by both a ground-based experiment and an experiment that utilized LRO. Here we present the results to show that sub-nanosecond precision and accuracy are achievable. Both experiments were carried out between the primary LRO-LR station, The Next Generation Satellite Laser Ranging (NGSLR) station, and its nearby station, Mobile Laser System (MOBLAS-7), both at Greenbelt, Maryland. The laser transmit time from both stations were recorded by the same event timer referenced to a Hydrogen maser. The results have been compared to data from a common All-View GPS, and showed < 1 nanosecond precision and accuracy over 6 months. Time transfer experiments between NGSLR and McDonald Observatory SLR station at Fort Davis, Texas have also been conducted and analysis of the data will be presented. JF - American Geophysical Union Fall Meeting AU - Mao, D AU - Sun, X AU - Skillman, D R AU - McGarry, J AU - Hoffman, E AU - Neumann, G A AU - Torrence, M H AU - Smith, D E AU - Zuber, M T AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G13A EP - 0503 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/1739085260?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Time-transfer+experiments+between+satellite+laser+ranging+ground+stations+via+one-way+laser+ranging+to+the+Lunar+Reconnaissance+Orbiter&rft.au=Mao%2C+D%3BSun%2C+X%3BSkillman%2C+D+R%3BMcGarry%2C+J%3BHoffman%2C+E%3BNeumann%2C+G+A%3BTorrence%2C+M+H%3BSmith%2C+D+E%3BZuber%2C+M+T%3BAnonymous&rft.aulast=Mao&rft.aufirst=D&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Diurnal and semi-diurnal Earth rotation derived from 35 years of VLBI measurements AN - 1739085149; 2015-116756 AB - I present an empirical model of diurnal and semi-diurnal Earth rotation ("HF-EOP") derived from 35 years of VLBI data, and compare the results against other models derived from Space Geodesy (SG) using GPS and/or VLBI, as well as results derived from various satellite altimetry tidal models ("tidal models"). I discuss various alternative ways of estimating HF-EOP. Overall there is good agreement among the empirical SG HF-EOP models, as well as among the HF-EOP models derived from tidal models. The agreement between the empirical SG models and tidal models is not as good. Including the effect of libration improves the agreement, but there are still significant discrepancies. I also discuss some consequences of using the orthotide formalism as implemented in the 2010 IERS conventions, and suggest some ways to improve the IERS HF-EOP model. JF - American Geophysical Union Fall Meeting AU - Gipson, J M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G12A EP - 05 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085149?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Diurnal+and+semi-diurnal+Earth+rotation+derived+from+35+years+of+VLBI+measurements&rft.au=Gipson%2C+J+M%3BAnonymous&rft.aulast=Gipson&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 - Magnetic crustal thickness estimations versus models for crustal magnetization AN - 1739082480; 2015-116859 AB - Many studies have attempted to evaluate the magnetic crustal thickness because this can provide an estimate of the depth to Curie temperature isotherm in areas characterized by high heat flow and an estimate of the depth to the Moho in areas of low heat flow if the mantle is considered non magnetic. There are currently two families of methods used to estimate crustal magnetic thickness. Statistical methods are based on the analysis of the power spectrum of magnetic anomalies and assume a random or fractal model for crustal magnetization. Equivalent dipole methods assume that the crust contains only induced magnetization characterized by a constant magnetic susceptibility and that it can be approximated by a surface distribution of dipoles. Although the first family of methods is most often applied to airborne data and the second family of methods is most often applied to satellite data, they can potentially be applied to both types of data. Because these families of methods rely on very different assumptions, they are not expected to provide the same thickness estimates and depending on the study area one method may be more applicable than the other. In this study, we apply both a statistical method and a dipole equivalent method for estimating the magnetic crustal thickness using aeromagnetic compilations available in the Western US, Greenland, and Australia, and also using synthetic datasets. We compare results from both methods and discuss similarities and differences with respect to the geological context and the data quality. JF - American Geophysical Union Fall Meeting AU - Bouligand, Claire AU - Purucker, Michael E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GP33A EP - 3697 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/1739082480?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Magnetic+crustal+thickness+estimations+versus+models+for+crustal+magnetization&rft.au=Bouligand%2C+Claire%3BPurucker%2C+Michael+E%3BAnonymous&rft.aulast=Bouligand&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 - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Sensing the electrical conductivity of the upper mantle and lithosphere using satellite magnetic signal due to ocean tidal flow AN - 1739082418; 2015-116926 AB - A few scientific groups convincingly demonstrated that the magnetic fields induced by the lunar semidiurnal (M2) ocean flow can be identified in magnetic satellite observations. These results support the idea to recover M2 magnetic signals from Swarm data, and to use these data for constraining lithosphere and upper mantle electrical conductivity in oceanic regions. Induction studies using ionospheric and magnetospheric primary sources with periods of about one day are sensitive to mantle conductivity at a few hundred kilometers depth because of the inductive coupling between primary and induced sources. In contrast, using oceanic tides as a signal allows studying shallower regions since the coupling is galvanic. This corresponds to global electric sounding. In this study we perform global 3-D EM numerical simulations in order to investigate the sensitivity of M2 signals to conductivity distributions at different depths. The results of sensitivity analysis are discussed, and comparison of the modelled M2 signals with those recovered by Comprehensive Inversion from one year of Swarm data is presented. JF - American Geophysical Union Fall Meeting AU - Schnepf, N R AU - Kuvshinov, A V AU - Sabaka, Terence J AU - Olsen, N AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GP43B EP - 07 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/1739082418?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Sensing+the+electrical+conductivity+of+the+upper+mantle+and+lithosphere+using+satellite+magnetic+signal+due+to+ocean+tidal+flow&rft.au=Schnepf%2C+N+R%3BKuvshinov%2C+A+V%3BSabaka%2C+Terence+J%3BOlsen%2C+N%3BAnonymous&rft.aulast=Schnepf&rft.aufirst=N&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - 15 years of Terra, 14 years of application usage AN - 1739082037; 2015-116799 AB - The instruments onboard the Terra spacecraft were designed for long-term Earth science research but not long after launch it became apparent that this data and imagery could be made available in near real-time for applications users. During the year 2000 fire season in the western United States, the US Forest Service approached NASA with a request to expedite MODIS fire detections. The Rapid Response system was created to generate fire detections as well as true color imagery in both swath and geo-referenced formats. This imagery was used by a wide variety of applications, such as NASA's AERONET program, the USDA Foreign Agricultural Service, Antarctic resupply shipping, flood mapping for relief agencies, Deepwater Horizon monitoring, volcanic ash monitoring, as well as print, televised, and Internet media. From 2004, the University of Maryland's Web Fire Mapper helped distribute fire detection information in a variety of formats. However, the applications community expressed the need for near-real time access to the underlying data. This requirement led to the development of the Land Atmosphere Near real-time Capability for EOS (Earth Observing System) (LANCE) in 2009. To achieve the latency requirements, many components of the EOS satellite operations, ground and science processing systems had to be made more efficient. In addition, products that require ancillary data were modified to use alternate inputs. Forty Terra MODIS data products are currently available from LANCE. LANCE also includes data from other instruments including AIRS, AMSR-E, MLS, and OMI. To help near-real time users navigate this large data offering, a new imagery service was begun in 2011--Global Imagery Browse Services (GIBS). This service provides very responsive viewing using the Web Map Tile Service protocol. These programs will continue to support and expand the use of Terra data for near-real time applications well into the future. JF - American Geophysical Union Fall Meeting AU - Schmaltz, Jeffrey E AU - Alarcon, Christian AU - Boller, Ryan A AU - Cechini, Matthew F AU - Davies, D AU - Fu, Gary AU - Gunnoe, Taylor AU - Hall, Jeffrey R AU - Huang, Thomas AU - Ilavajhala, Shriram AU - Jackson, Maki AU - King, Jerome A AU - McGann, Mike AU - Murphy, Kevin J AU - Roberts, Joe T AU - Thompson, Charles K AU - Ye, Gang AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GC54C EP - 08 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739082037?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=15+years+of+Terra%2C+14+years+of+application+usage&rft.au=Schmaltz%2C+Jeffrey+E%3BAlarcon%2C+Christian%3BBoller%2C+Ryan+A%3BCechini%2C+Matthew+F%3BDavies%2C+D%3BFu%2C+Gary%3BGunnoe%2C+Taylor%3BHall%2C+Jeffrey+R%3BHuang%2C+Thomas%3BIlavajhala%2C+Shriram%3BJackson%2C+Maki%3BKing%2C+Jerome+A%3BMcGann%2C+Mike%3BMurphy%2C+Kevin+J%3BRoberts%2C+Joe+T%3BThompson%2C+Charles+K%3BYe%2C+Gang%3BAnonymous&rft.aulast=Schmaltz&rft.aufirst=Jeffrey&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 - Can we derive the current density from three point LEO measurements of the magnetic field perturbations? AN - 1739081838; 2015-116934 AB - In this paper, we perform critical test of the well-known curlometer technique. The curlometer technique allows a derivation of the current density using measurements of the magnetic field at spatially separated points. At LEO altitudes this generally three dimensionally problem is simplified to a two dimensions by the fact that the current is almost solely flowing along the magnetic field lines. Strictly speaking the current density is derived from integration around a closed loop but in the curlometer technique this integration is simplified to a summation over just three points. In this paper we present a critical analysis of when and to what extend this approximation is valid. We show some simple theoretical considerations, results from a series of simulations, and finally apply the knowledge to ESA SWARM measurements. JF - American Geophysical Union Fall Meeting AU - Gjerloev, Jesper W AU - Potter, Matthew AU - Muhleisen, M AU - Friel, M M AU - Martin, P AU - Le, Guan AU - Stolle, C AU - Luhr, H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GP51A EP - 3710 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/1739081838?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Can+we+derive+the+current+density+from+three+point+LEO+measurements+of+the+magnetic+field+perturbations%3F&rft.au=Gjerloev%2C+Jesper+W%3BPotter%2C+Matthew%3BMuhleisen%2C+M%3BFriel%2C+M+M%3BMartin%2C+P%3BLe%2C+Guan%3BStolle%2C+C%3BLuhr%2C+H%3BAnonymous&rft.aulast=Gjerloev&rft.aufirst=Jesper&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 Swarm Initial Field Model; a model of the Earth's magnetic field for 2014 determined from one year of swarm satellite constellation data AN - 1739081825; 2015-116927 AB - Almost one year of data from ESA's Swarm constellation mission are used to derive a model of the Earth's magnetic field and its time variation (secular variation). The model describes contributions from the core and lithosphere as well as large-scale contributions from the magnetosphere (and its Earth-induced counterpart). We use data from geomagnetic quiet times (Kp less than 2o, time change of Dst-index less than 2 nT/hr) and dark regions (sun below horizon) and co-estimate the Euler angles describing the rotation between the vector magnetometer instrument frame and the North-East-Center (NEC) frame. In addition to the magnetic field observations provided by each of the three Swarm satellites we include the East-west magnetic gradient information provided by the lower Swarm satellite pair, thereby explicitly taking advantage of the constellation aspect of Swarm. We assess the spatial and temporal model resolution that can be obtained from one year of Swarm satellite data by comparison with other recent models that also include non-Swarm magnetic observations. JF - American Geophysical Union Fall Meeting AU - Olsen, N AU - Hulot, G AU - Lesur, V AU - Finlay, C C AU - Beggan, C AU - Chulliat, Arnaud AU - Sabaka, Terence J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GP51A EP - 3702 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/1739081825?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+Swarm+Initial+Field+Model%3B+a+model+of+the+Earth%27s+magnetic+field+for+2014+determined+from+one+year+of+swarm+satellite+constellation+data&rft.au=Olsen%2C+N%3BHulot%2C+G%3BLesur%2C+V%3BFinlay%2C+C+C%3BBeggan%2C+C%3BChulliat%2C+Arnaud%3BSabaka%2C+Terence+J%3BAnonymous&rft.aulast=Olsen&rft.aufirst=N&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Forecasting in complex systems AN - 1734270229; 2015-108882 AB - Complex nonlinear systems are typically characterized by many degrees of freedom, as well as interactions between the elements. Interesting examples can be found in the areas of earthquakes and finance. In these two systems, fat tails play an important role in the statistical dynamics. For earthquake systems, the Gutenberg-Richter magnitude-frequency is applicable, whereas for daily returns for the securities in the financial markets are known to be characterized by leptokurtotic statistics in which the tails are power law. Very large fluctuations are present in both systems. In earthquake systems, one has the example of great earthquakes such as the M9.1, March 11, 2011 Tohoku event. In financial systems, one has the example of the market crash of October 19, 1987. Both were largely unexpected events that severely impacted the earth and financial systems systemically. Other examples include the M9.3 Andaman earthquake of December 26, 2004, and the Great Recession which began with the fall of Lehman Brothers investment bank on September 12, 2013. Forecasting the occurrence of these damaging events has great societal importance. In recent years, national funding agencies in a variety of countries have emphasized the importance of societal relevance in research, and in particular, the goal of improved forecasting technology. Previous work has shown that both earthquakes and financial crashes can be described by a common Landau-Ginzburg-type free energy model. These metastable systems are characterized by fat tail statistics near the classical spinodal. Correlations in these systems can grow and recede, but do not imply causation, a common source of misunderstanding. In both systems, a common set of techniques can be used to compute the probabilities of future earthquakes or crashes. In this talk, we describe the basic phenomenology of these systems and emphasize their similarities and differences. We also consider the problem of forecast validation and verification. In both of these systems, we show that small event counts (the natural time domain) is an important component of a forecast system. JF - American Geophysical Union Fall Meeting AU - Rundle, J B AU - Holliday, J R AU - Graves, W R AU - Turcotte, D L AU - Donnellan, Andrea AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NG22A 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/1734270229?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Forecasting+in+complex+systems&rft.au=Rundle%2C+J+B%3BHolliday%2C+J+R%3BGraves%2C+W+R%3BTurcotte%2C+D+L%3BDonnellan%2C+Andrea%3BAnonymous&rft.aulast=Rundle&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 - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Measurement of subsidence across the Sacramento delta; applying InSAR to a coherence-challenged area AN - 1734270011; 2015-108763 AB - InSAR-based measurement of ground subsidence rates are notoriously challenging in agricultural areas because of rapid temporal decorrelation introduced by physical disturbance of the ground and water content changes. This can be mitigated by the use of longer wavelength instruments and time series techniques, but measurement remains a challenge particularly in areas where the deformation rates are low. Here we discuss techniques developed to work with low coherence data in a project to measure sub-island scale subsidence rates across the Sacramento-San Joaquin Delta using SBAS processing of L-band UAVSAR data collected between July 2009 and February 2014. Determination of rates in this area is particularly valuable because of the Delta's critical importance as a water resource for the State of California and as an enormously productive estuarine ecosystem. Subsidence across the region has left most of the man-made islands below mean sea level and the levees maintaining their integrity are subject to a wide range of threats, including failure during earthquakes on the nearby Hayward and San Andreas fault. This research was conducted at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. JF - American Geophysical Union Fall Meeting AU - Jones, Cathleen E AU - Sharma, Priyanka AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G42A EP - 01 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734270011?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Measurement+of+subsidence+across+the+Sacramento+delta%3B+applying+InSAR+to+a+coherence-challenged+area&rft.au=Jones%2C+Cathleen+E%3BSharma%2C+Priyanka%3BAnonymous&rft.aulast=Jones&rft.aufirst=Cathleen&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 - A new persistent scatterer InSAR method based on phase decomposition, with application to subsidence in greater Houston area AN - 1734269861; 2015-108778 AB - A Phase-Decomposition-based Persistent Scatterer InSAR (PD-PSInSAR) method is developed in this study to improve the coherence and spatial density of targets. The general idea of conventional PSInSAR is to find and analyze pointwise stable persistent scatterers (PS). In order to improve the PS network density, distributed scatterers (DS) has also been utilized in several advanced PSInSAR techniques. Unlike these techniques which assumes that a DS involves many independent small scatterers sharing the same scatterering mechanism, this study considers additional two general cases: (1) a DS that contains many small scatterers sharing two or more different scatterering mechanisms, (2) two or more dominant scatterers with different scatterering mechanisms that exist within the same resolution pixel. DSs with multiple scatterering mechanisms can occur in rural areas and some urban areas, especially with low spatial resolution. Extracting information from DSs with multiple scatterering mechanisms is difficult for the existing DS algorithms because of the interference between different scatterering mechanisms. The new PD-PSInSAR method is developed to overcome this limit by using Eigen-decomposition to estimate the phases corresponding to the different scatterering mechanisms, and then implement these estimated phases in conventional PSInSAR process. Therefore, the interference between different scattering mechanisms becomes mitigated and the obtained phases are expected to have better coherence. This PD-PSInSAR technique is used to estimate the land deformation over the greater Houston area using 25 ENVISAT ASAR data spanning from July 2004 to June 2010. The deformation map reveals significant subsidence up to approximately 2 cm/year over north and northwestern part of greater Houston. Comparison between the conventional PSInSAR and PD-PSInSAR method verifies that the proposed method can detect more PSs and provide better coherences. JF - American Geophysical Union Fall Meeting AU - Cao, N AU - Lee, H AU - Jung, H C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G43A EP - 0498 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734269861?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+new+persistent+scatterer+InSAR+method+based+on+phase+decomposition%2C+with+application+to+subsidence+in+greater+Houston+area&rft.au=Cao%2C+N%3BLee%2C+H%3BJung%2C+H+C%3BAnonymous&rft.aulast=Cao&rft.aufirst=N&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Impact scaling for lunar impact basins; contributions from GRAIL and hydrocode modeling AN - 1734269808; 2015-108719 AB - Impact events forming large craters (or, impact basins) several hundreds of kilometers in diameter have profoundly affected the evolution of the terrestrial planets. Previously acquired gravity and topography data of the Moon have shown evidence of crustal thinning in the central regions of these basins, which is a consequence of the basin formation process. High-resolution crustal thickness maps derived from the Gravity Recovery And Interior Laboratory (GRAIL) and Lunar Orbiter Laser Altimeter (LOLA) data afford an unambiguous measure of the lateral extent of crustal thinning in lunar basins (protobasins, peak-ring and multi-ring basins). This region of crustal thinning can be used as a measure of basin size. In this work, we used the iSALE-2D numerical shock physics hydrocode to model the formation of lunar basins. We tested our simulations against crater structures observed by GRAIL. As a result, a new scaling law for impact basins on the Moon is derived. We show relationships between the transient crater size (including the impactor properties) as calculated by the hydrocode and the final crustal thinning diameter of an impact basin as well as an approximate relationship to the location of the basin rings, as mapped by LOLA and GRAIL. These scaling laws include lateral variations in the target properties, namely between the Procellarum KREEP Terrane on the nearside and the lunar highlands on the farside hemisphere. This work provides additional constraints on the extent of the Late Heavy Bombardment epoch. JF - American Geophysical Union Fall Meeting AU - Miljkovic, Katarina AU - Wieczorek, Mark A AU - Collins, G S AU - Neumann, Gregory A AU - Soderblom, J M AU - Johnson, B C AU - Minton, D A AU - Smith, David E AU - Zuber, M T AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G33A EP - 0431 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/1734269808?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+scaling+for+lunar+impact+basins%3B+contributions+from+GRAIL+and+hydrocode+modeling&rft.au=Miljkovic%2C+Katarina%3BWieczorek%2C+Mark+A%3BCollins%2C+G+S%3BNeumann%2C+Gregory+A%3BSoderblom%2C+J+M%3BJohnson%2C+B+C%3BMinton%2C+D+A%3BSmith%2C+David+E%3BZuber%2C+M+T%3BAnonymous&rft.aulast=Miljkovic&rft.aufirst=Katarina&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 - Southern Greenland water vapour isotopic composition at the crossroads of Atlantic and Arctic moisture AN - 1734269523; 2015-112106 AB - Since September 2011, a continuous water vapour isotopic composition monitoring instrument has been remotely operated in Ivittuut (61.21 degrees N, 48.17 degrees W), southern Greenland. Meteorological parameters are monitored and precipitation has been sampled and analysed for isotopic composition, suggesting equilibrium between surface vapour and precipitation. The data depict small summer diurnal variations. delta 18O and deuterium excess (d-excess) are generally anti-correlated and show important seasonal variations (with respective amplitudes of 10 and 20 ppm), and large synoptic variations associated to low-pressure systems (typically +5 ppm on delta 18O and -15 ppm on d-excess). The moisture sources, estimated based on Lagrangian back-trajectories, are primarily influenced by the western North Atlantic, and north-eastern American continent. Notable are important seasonal and synoptic shifts of the moisture sources, and sporadic influences of the Arctic or the eastern North Atlantic. Moisture sources variations can be related to changes in water vapour isotopic composition, and the isotopic fingerprints can be attributed to the areas of moisture origins. Isotopic enabled AGCMs nudged to meteorology (LMDZiso, ECHAM5-wiso), despite biases, correctly capture the delta 18O changes, but underestimate the d-excess changes. They allow to identify a high correlation between the southern Greenland d-excess and the simulated relative humidity and d-excess in the moisture source region south of Greenland. An extreme high temperature event in July 2012 affecting all Greenland, similar to ice sheet melt events during the medieval periods and one event in 1889 documented by Greenland ice core records, has been analysed regarding water vapour isotopic composition, using remote sensing (IASI) and in situ observations from Bermuda to northern Greenland (NEEM station). Our southern Greenland observations allow to track the water vapour evolution during this event along the moisture transport path, depicting the northward propagation of an isotopic signal inherited from the meteorological conditions during evaporation. Overall, our observations provide valuable information for interpreting Greenland ice core records as well as for evaluating water vapour isotopic simulations in atmospheric models. JF - American Geophysical Union Fall Meeting AU - Bonne, Jean-Louis AU - Steen-Larsen, Hans C AU - Risi, C M AU - Werner, Martin AU - Sodemann, Harald AU - Lacour, J L AU - Fettweis, Xavier AU - Cesana, Gregory AU - Delmotte, Marc AU - Cattani, O AU - Clerbaux, Cathy AU - Sveinbjornsdottir, Arny E AU - Masson-Delmotte, Valerie AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP31D EP - 1185 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/1734269523?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Southern+Greenland+water+vapour+isotopic+composition+at+the+crossroads+of+Atlantic+and+Arctic+moisture&rft.au=Bonne%2C+Jean-Louis%3BSteen-Larsen%2C+Hans+C%3BRisi%2C+C+M%3BWerner%2C+Martin%3BSodemann%2C+Harald%3BLacour%2C+J+L%3BFettweis%2C+Xavier%3BCesana%2C+Gregory%3BDelmotte%2C+Marc%3BCattani%2C+O%3BClerbaux%2C+Cathy%3BSveinbjornsdottir%2C+Arny+E%3BMasson-Delmotte%2C+Valerie%3BAnonymous&rft.aulast=Bonne&rft.aufirst=Jean-Louis&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 - Vertical variations in the influence of the amount effect; South American summer monsoon region AN - 1734269407; 2015-112086 AB - Recent theoretical studies have shown that convective recycling of atmospheric water vapor gives rise to the isotope "amount effect" in which d values are lower than predicted by simple Rayleigh distillation processes (i.e. (DdD=dDvapor--dDRayleigh <0 ppm). Several studies have linked isotopes in precipitation [e.g. Vimeux et al., 2009] and atmospheric water vapor [e.g. Samuels-Crow et al., 2014] in the tropical Andes to upwind convection associated with the South American Summer Monsoon (SASM). The vertical structure of this convective influence, however, remains unknown. Understanding the vertical structure of the amount effect over South America is essential for improving theoretical constraints and developing better models of the influence of the SASM on southern hemisphere humidity. Additionally, evaluating the vertical and lateral extent of the SASM's convective influence can provide important constraints for interpreting paleoclimate proxies in the region. We use data from the Tropospheric Emission Spectrometer (TES) to examine the vertical structure of the amount effect associated with the SASM and relate these results to regional convective precipitation and local subcloud equivalent potential temperature. Preliminary results show that DdD is below 0 ppm from the boundary layer through the mid-troposphere over tropical South America during austral summer, and meridional averages show that convective precipitation is highest over these areas where DdD <0 ppm extends higher in the atmosphere. We hypothesize that the depth of convection in the monsoon region controls the vertical structure of DdD, which should also be coherently linked to local equivalent potential temperature. JF - American Geophysical Union Fall Meeting AU - Samuels-Crow, K E AU - Galewsky, J AU - Worden, John R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP31D EP - 1165 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/1734269407?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Vertical+variations+in+the+influence+of+the+amount+effect%3B+South+American+summer+monsoon+region&rft.au=Samuels-Crow%2C+K+E%3BGalewsky%2C+J%3BWorden%2C+John+R%3BAnonymous&rft.aulast=Samuels-Crow&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 - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Shortening rates in the Nepalese Himalaya derived from quantitative geomorphic analysis AN - 1734269387; 2015-111787 AB - The rates and distribution of active shortening throughout the Himalayan foreland have been the subject of intense study for the past several decades. Despite substantial progress, the distribution of slip on specific faults remains poorly understood. Numerous studies suggest that fluvial systems developed above growing folds exhibit strong correlations with uplift rate. Here, we build on these studies to develop a quantitative, empirical calibration of the scaling between channel steepness index (ksn - a measure of channel gradient normalized for drainage area) and uplift rate; we derive a geometric model of uplift rate using data of Lave and Avouac (2000) and analyze channel profiles using a 30m DEM derived from SRTM data. Our analysis confirms a linear relationship between uplift rate and ksn; we apply this calibration to regions of similar lithology along the Baisahi anticline in western Nepal. Here, channel profiles exhibit smooth profiles with similar concavity, consistent with spatially uniform uplift rates above a planar ramp in the Main Frontal Thrust fault (Mugnier et al., 1999). Channel steepness indices along the western anticline are invariant with position along the anticline, suggesting a uniform uplift rate of 9 mm/yr + or - 2 mm/yr. Along the eastern portion of the anticline, steepness indices increase systematically from west to east, suggesting that uplift rates increase toward the east. However, structural data suggest that this reflects an increase in the dip of the fault at depth (Husson and Mugnier, 2003). Our analysis suggests that the Baisahi anticline absorbs 17.5 mm/yr + or - 4 mm/yr of active shortening. Our results demonstrate how local calibration of channel profile adjustment to uplift rate can be used to place constraints on active deformation in regions where other geomorphic markers are sparse or absent. JF - American Geophysical Union Fall Meeting AU - Meghani, N A AU - Kirby, E AU - Farr, T G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract EP53A EP - 3592 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734269387?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Shortening+rates+in+the+Nepalese+Himalaya+derived+from+quantitative+geomorphic+analysis&rft.au=Meghani%2C+N+A%3BKirby%2C+E%3BFarr%2C+T+G%3BAnonymous&rft.aulast=Meghani&rft.aufirst=N&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - The JPL ASTER Volcano Archive; the development and capabilities of a 15 year global high resolution archive of volcano data AN - 1734269238; 2015-112066 AB - The physical and temporal systematics of the world's volcanic activity is a compelling and productive arena for the exercise of orbital remote sensing techniques, informing studies ranging from basic volcanology to societal risk. Comprised of over 160,000 frames and spanning 15 years of the Terra platform mission, the ASTER Volcano Archive (AVA: http://ava.jpl.nasa.gov) is the world's largest (100+Tb) high spatial resolution (15-30-90 m/pixel), multi-spectral (visible-SWIR-TIR), downloadable (kml enabled) dedicated archive of volcano imagery. We will discuss the development of the AVA, and describe its growing capability to provide new easy public access to ASTER global volcano remote sensing data. AVA system architecture is designed to facilitate parameter-based data mining, and for the implementation of archive-wide data analysis algorithms. Such search and analysis capabilities exploit AVA's unprecedented time-series data compilations for over 1,550 volcanoes worldwide (Smithsonian Holocene catalog). Results include thermal anomaly detection and mapping, as well as detection of SO2 plumes from explosive eruptions and passive SO2 emissions confined to the troposphere. We are also implementing retrospective ASTER image retrievals based on volcanic activity reports from Volcanic Ash Advisory Centers (VAACs) and the US Air Force Weather Agency (AFWA). A major planned expansion of the AVA is currently underway, with the ingest of the full 1972-present LANDSAT, and NASA EO-1, volcano imagery for comparison and integration with ASTER data. Work described here is carried out under contract to NASA at the Jet Propulsion Laboratory as part of the California Institute of Technology. JF - American Geophysical Union Fall Meeting AU - Linick, Justin P AU - Pieri, David C AU - Sanchez, R M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GC51E EP - 0482 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/1734269238?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+JPL+ASTER+Volcano+Archive%3B+the+development+and+capabilities+of+a+15+year+global+high+resolution+archive+of+volcano+data&rft.au=Linick%2C+Justin+P%3BPieri%2C+David+C%3BSanchez%2C+R+M%3BAnonymous&rft.aulast=Linick&rft.aufirst=Justin&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Toward automated feature detection in UAVSAR images AN - 1734268155; 2015-108888 AB - Edge detection identifies seismic or aseismic fault motion, as demonstrated in repeat-pass inteferograms obtained by the Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) program. But this identification is not robust at present: it requires a flattened background image, interpolation into missing data (holes) and outliers, and background noise that is either sufficiently small or roughly white Gaussian. Identification and mitigation of nongaussian background image noise is essential to creating a robust, automated system to search for such features. Clearly a robust method is needed for machine scanning of the thousands of UAVSAR repeat-pass interferograms for evidence of fault slip, landslides, and other local features.Empirical examination of detrended noise based on 20 km east-west profiles through desert terrain with little tectonic deformation for a suite of flight interferograms shows nongaussian characteristics. Statistical measurement of curvature with varying length scale (Allan variance) shows nearly white behavior (Allan variance slope with spatial distance from roughly -1.76 to -2) from 25 to 400 meters, deviations from -2 suggesting short-range differences (such as used in detecting edges) are often freer of noise than longer-range differences. At distances longer than 400 m the Allan variance flattens out without consistency from one interferogram to another. We attribute this additional noise afflicting difference estimates at longer distances to atmospheric water vapor and uncompensated aircraft motion. Paradoxically, California interferograms made with increasing time intervals before and after the El Mayor Cucapah earthquake (2008, M7.2, Mexico) show visually stronger and more interesting edges, but edge detection methods developed for the first year do not produce reliable results over the first two years, because longer time spans suffer reduced coherence in the interferogram. The changes over time are reflecting fault slip and block motion, indicating the continuing slip along minor faults in the post seismic phase of the main rupture. We show current results using computer vision methods that respect the noise and coherence characteristics. JF - American Geophysical Union Fall Meeting AU - Parker, Jay W AU - Donnellan, Andrea AU - Glasscoe, Margaret T AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NG23A EP - 3798 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/1734268155?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Toward+automated+feature+detection+in+UAVSAR+images&rft.au=Parker%2C+Jay+W%3BDonnellan%2C+Andrea%3BGlasscoe%2C+Margaret+T%3BAnonymous&rft.aulast=Parker&rft.aufirst=Jay&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 - CubeSat for natural-hazard estimation with ionospheric sciences (CNEWS); a concept development to aid tsunami early warning systems AN - 1734268043; 2015-108932 AB - The Jet Propulsion Laboratory, the University New Brunswick (Canada) and the University of Hawaii have developed a concept to provide open ocean tsunami wave height estimates using very accurate measurements of absolute total electron content (TEC) perturbations. Ionosphere-derived tsunami wave height estimates from our CubeSat for Natural-Hazard Estimation With Ionospheric Sciences (CNEWS) mission will refine the tsunami source energy calculation and improve the tsunami scale calculation for a localized region. As a secondary science objective, transmitting impulsive HF/VHF (10-40 MHz) transmissions through the ionosphere will provide in-situ geomagnetic disturbance measurements, which allow for discrimination between tsunami-induced signatures and space-weather-related fluctuations. NASA has invested several millions of dollars in the development of a tsunami warning system based on geodetic measurements from ground-based GPS stations. Leveraging this investment by simultaneously using ionospheric measurement from this GPS network for the detection of tsunamis represents a significant step forward. GPS ionospheric imaging is limited, however, by the slowly changing satellite geometry and its weak absolute TEC resolution (about 3 TECU). It has also been shown that GPS ionospheric imaging alone cannot distinguish between space weather fluctuations and those due to natural hazards. The very precise ionospheric measurements generated by CNEWS are expected to provide a quasi-static image of tsunami ionospheric signatures that we will use in an advanced model inversion technique to estimate tsunami wave heights at 10 cm (one sigma) uncertainty. The geomagnetic field strength resolution is also a key constraint for discriminating between natural hazards and space weather effects. HF/VHF impulses can resolve absolute TEC measurements at the 0.02 TECU level and geomagnetic field strength may be measured at 50 nT resolution. JF - American Geophysical Union Fall Meeting AU - Komjathy, Attila AU - Romero-Wolf, Andrew AU - Yang, Y M AU - Langley, R B AU - Foster, J H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH31C EP - 3868 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/1734268043?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=CubeSat+for+natural-hazard+estimation+with+ionospheric+sciences+%28CNEWS%29%3B+a+concept+development+to+aid+tsunami+early+warning+systems&rft.au=Komjathy%2C+Attila%3BRomero-Wolf%2C+Andrew%3BYang%2C+Y+M%3BLangley%2C+R+B%3BFoster%2C+J+H%3BAnonymous&rft.aulast=Komjathy&rft.aufirst=Attila&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 - Towards the implementation of GPS-based tsunami early warning system using ionospheric measurements AN - 1734267655; 2015-108863 AB - Natural hazards and solid Earth events, such as earthquakes, tsunamis and volcanic eruptions are actual sources that may trigger acoustic and gravity waves resulting in traveling ionospheric disturbances (TIDs) in the upper atmosphere. Trans-ionospheric radio wave measurements sense the total electron content (TEC) along the signal propagation path. In this research, we introduce a novel GPS-based detection and estimation technique for remote sensing of atmospheric wave-induced TIDs including space weather phenomena induced by major natural hazard events, using TEC time series collected from worldwide ground-based dual-frequency GNSS receiver networks. We will demonstrate the ability of using ground-based dual-frequency GPS measures to detect and monitor tsunami wave propagations from previous great earthquake and tsunami events including: 2011 Tohoku and 2010 Chile earthquakes and tsunamis. Two major TIDs with different propagation speeds and wavelengths were identified through analysis of the GPS remote sensing observations. Dominant physical characteristics of atmospheric wave-induced TIDs are found to be associated with specific tsunami propagations and oceanic Rayleigh waves. We compared GPS-based observations, corresponding model simulations and other geophysical measurements. Our results lead to a better understanding of the tsunami-induced ionosphere responses. In addition, we investigate ionospheric signatures caused by the 1964 Great Alaska Earthquake and tsunami using the GPS-based method. Based on current distribution of Plate Boundary Observatory (PBO) GPS stations, the simulated results indicate that tsunami-induced TIDs may be detected about 60 minutes prior to tsunamis arriving at the US west coast. It is expected that this GPS-based technology becomes an integral part of future early-warning systems. JF - American Geophysical Union Fall Meeting AU - Yang, Y M AU - Komjathy, Attila AU - Meng, Xing AU - Verkhoglyadova, Olga P AU - Mannucci, Anthony J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G52A EP - 09 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/1734267655?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+the+implementation+of+GPS-based+tsunami+early+warning+system+using+ionospheric+measurements&rft.au=Yang%2C+Y+M%3BKomjathy%2C+Attila%3BMeng%2C+Xing%3BVerkhoglyadova%2C+Olga+P%3BMannucci%2C+Anthony+J%3BAnonymous&rft.aulast=Yang&rft.aufirst=Y&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 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 - Exploration of the Moon and asteroids by secondary students (ExMASS); an authentic, open-inquiry research experience for high school students AN - 1734267533; 2015-108633 AB - The National Research Council (2012) has expressed a need for participatory science experiences for students. Opportunities are needed for students which 1) allow them to understand how scientific knowledge develops and 2) can heighten their curiosity, capture their interest, and motivate their continued study of science. Studies (e.g., Aydeniz et al., 2011) have also recommend educators provide students with opportunities to do science through extracurricular work with scientists. In addition to being given the opportunity to fully participate in the scientific enterprise, students must also be explicitly guided in their attempts to develop a more appropriate understanding of the nature of the scientific enterprise (McDonald, 2010; Rudge & Howe, 2010; Yacoubian & BouJaoude, 2010). Exploration of the Moon and Asteroids by Secondary Students, or ExMASS, provides such an opportunity for students. The ExMASS program is an education effort managed by the LPI/NASA JSC-led Center for Lunar Science and Exploration (CLSE), one of nine teams comprising NASA's Solar System Exploration Research Virtual Institute (SSERVI). Over the course of one academic year, teams of high school students conduct their own scientific investigations of either Earth's Moon or asteroids, with guidance from a scientist mentor. The program includes two elements: 1) a guided inquiry introductory research activity that builds student knowledge of current lunar/asteroid science and lunar/asteroid data, and 2) an open inquiry research project in which the students apply their knowledge to a self-defined project. Evaluation data collected during the predecessor program to ExMASS revealed many successes, but also room for improvement. In response, an Advisory Group consisting of past teachers and mentors was formed to address the gaps revealed in the evaluation data. The ExMASS program will continue to collect similar evaluation data including assessment of changes in students' lunar/asteroid content knowledge, student attitudes toward science and science careers, and views of the nature of science and scientific inquiry. Exit surveys for teachers, students, and mentors will also be used to gather general feedback about the program and its impact. JF - American Geophysical Union Fall Meeting AU - Shaner, A J AU - Allen, J S AU - Shipp, S S AU - Kramer, G Y AU - Nahm, A AU - Balazs, L AU - Fuller, J AU - Newland, J AU - Snyder, R D AU - Kring, D A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract ED21B EP - 3446 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/1734267533?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Exploration+of+the+Moon+and+asteroids+by+secondary+students+%28ExMASS%29%3B+an+authentic%2C+open-inquiry+research+experience+for+high+school+students&rft.au=Shaner%2C+A+J%3BAllen%2C+J+S%3BShipp%2C+S+S%3BKramer%2C+G+Y%3BNahm%2C+A%3BBalazs%2C+L%3BFuller%2C+J%3BNewland%2C+J%3BSnyder%2C+R+D%3BKring%2C+D+A%3BAnonymous&rft.aulast=Shaner&rft.aufirst=A&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Stress-stimulated current of dry rocks with constant clamping stress AN - 1734267045; 2015-108931 AB - A set of nominally dry rocks (gabbro, granite, limestone, marble, and sandstone) were subjected to asymmetric loading with a large hydraulic press. A pair of precision platens made from 1018 low carbon steel were used to apply uniaxial compressive stress (sigma ) to the sample, via a thin electrical insulator made from ultra-high molecular weight (UHMW) polyethylene. Self-adhesive copper electrodes were applied and burnished on the end faces and the stress-stimulated current (SSC) was monitored using a Keithley 617 instrument. A preload stress level of 5.5 MPa was applied to firmly clamp the assembly throughout the experiment. From this baseline, sigma was increased to 22.25 MPa and held for 100 seconds before returning to the clamping stress level. This loading profile was repeated for four or more cycles, with a stress rate on the order of 5 MPa/sec. After the first load cycle, the SSC transients (and SSV offsets) are reversible when sigma returned to its baseline level. All samples showed alternating unipolar SSC transients at the beginning and end of each load cycle. SSC from limestone, Westerly granite and marble were at, or below, the measurement limit (+ or -1 pA). All other samples except sandstone showed a negative SSC with increasing stress. For stress-stimulated voltage (SSV) there was a richer variety of transients observed such as unipolar, bipolar and more complex transient dynamics. Limestone was the only sample tested with no SSV transients although this particular rock had a major calcite inclusion in the sample. White granite tended to have the least stable SSC and SSV values. Of the six different rock samples tested under identical conditions, the SSC and SSV observed were not greater than -15 pA, presumably due to improved experimental procedures. The response for rocks with semiconductor properties (gabbro, granite) is the same as those without semiconductor properties (limestone, marble), although the values for marble were below the noise. For repetitive Delta sigma of 16.7 MPa gabbro, limestone, and three types of granite showed negative or zero SSC, and sandstone exhibited roughly +1 pA SSC. In conclusion, use of a constant clamping force was found to eliminate a large source of instability in the experiment. Stability improved after the first full cycle, and if subsequent loads were kept below the maximum load of the first cycle. JF - American Geophysical Union Fall Meeting AU - Dahlgren, R P AU - Vanderbilt, Vern C AU - Johnston, M J S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH31B EP - 3867 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734267045?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Stress-stimulated+current+of+dry+rocks+with+constant+clamping+stress&rft.au=Dahlgren%2C+R+P%3BVanderbilt%2C+Vern+C%3BJohnston%2C+M+J+S%3BAnonymous&rft.aulast=Dahlgren&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - On the generation of ionospheric atmospheric gravity waves (AGWs) before major earthquakes AN - 1734266625; 2015-108948 AB - When the Earth surface heaves during major earthquakes, it acts like the membrane of a drum, sending air pressure waves upward. With increasing height and decreasing air density these waves increase in amplitude, leading to ionospheric perturbations known as Atmospheric Gravity Waves (AGWs). However, prior to many major earthquakes, without any up and down movement of the Earth surface, similar ionospheric perturbations are often recorded above the future epicenters hours to days before the seismic events. The origin of these pre-seismic AGWs is unknown. In this study, we examine possible formation mechanisms of pre-seismic AGWs based on the findings that, when rocks are stressed, highly mobile electronic charge carriers are activated. Those charge carriers are positive holes, i.e. defect electrons in the oxygen anion sublattice. They are able to flow out of the stressed rock volume and able to traverse kilometers of overlying rocks. At the Earth surface they cause microscopic but steep electric fields, capable of field-ionizing air molecules. This process leads to the injection of massive amounts of predominantly, often exclusively, positive airborne ions at the ground-to-air interface, often over a wide area around the future epicenter. The air ionization is not a steady process but tends to occur in bursts, lasting from seconds in laboratory experiments to minutes to tens of minutes in the field. The introduction of positive ions at the Earth surface is bound to cause a variety of effects, including electric phenomena and--importantly--air pressure pulses, which will propagate upward. We describe early theoretical work on the injection of positive airborne ions, on their upward movement through the atmospheric column, and on how this process may cause pre-seismic AGWs in the ionosphere. JF - American Geophysical Union Fall Meeting AU - Freund, Friedemann T AU - Funamoto, Jiro AU - Scoville, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH31C EP - 3884 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734266625?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=On+the+generation+of+ionospheric+atmospheric+gravity+waves+%28AGWs%29+before+major+earthquakes&rft.au=Freund%2C+Friedemann+T%3BFunamoto%2C+Jiro%3BScoville%2C+J%3BAnonymous&rft.aulast=Freund&rft.aufirst=Friedemann&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 - Broad-scale gravity changes following the 2011 Tohoku-Oki thrust and 2012 Indian Ocean strike-slip earthquakes and implications for coseismic dilatation and viscoelastic relaxation AN - 1734266294; 2015-108850 AB - We analyzed spatially- and temporally-continuous GRACE gravity observations by decomposing the gravity field changes into five independent moment tensor elements to understand the regional surface and interior deformation in response to post-earthquake stress/strain redistribution. For the 2011 Tohoku-Oki thrust earthquake, the GRACE data revealed postseismic gravity increase by 6 microGal over a 500-km scale within a couple of years, which is nearly 40-50 % of the coseismic gravity change. It originates mostly from changes in the isotropic component corresponding to the Mrr moment tensor element. For the 2012 Indian Ocean strike-slip earthquakes, the postseismic gravity change was similar to the coseismic change (including the Mw 8.6 and Mw 8.2 ruptures) with the magnitude smaller by approximately 80 % in two years. The gravity change corresponding to the Mtp moment tensor element is dominant (and also Mtt-Mpp to a lesser extent). In both earthquakes, the exponential decay with rapid change within a year and gradual change afterwards is a characteristic temporal pattern. We also compared the two earthquakes in terms of their respective seafloor vertical and interior deformation (Bouguer gravity). The processes responsible for the coseismic and postseismic gravity changes at a such spatial scale are, respectively, the density change (dilatation) and the viscoelastic deformation without much perturbation in density. The postseismic gravity variation is best modeled by bi-viscous relaxation with a transient and steady-state viscosity of 10 (super 18) and 10 (super 19) Pa s, respectively, for the asthenosphere. Furthermore, we found viscoelastic relaxation triggered by the partially-ruptured elastic lithosphere is a main driver of the local subsidence above the rupture region reported from the GPS-acoustic seafloor surveying after the 2011 Tohoku-Oki earthquake. JF - American Geophysical Union Fall Meeting AU - Han, S C AU - Sauber, J M AU - Pollitz, F F AU - Riva, R AU - Okal, E A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G51C EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734266294?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Broad-scale+gravity+changes+following+the+2011+Tohoku-Oki+thrust+and+2012+Indian+Ocean+strike-slip+earthquakes+and+implications+for+coseismic+dilatation+and+viscoelastic+relaxation&rft.au=Han%2C+S+C%3BSauber%2C+J+M%3BPollitz%2C+F+F%3BRiva%2C+R%3BOkal%2C+E+A%3BAnonymous&rft.aulast=Han&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 - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Wetland hydraulics along the middle reach of the Congo River revealed by repeat-pass multi-temporal interferometric SAR AN - 1734266102; 2015-112072 AB - The Congo River originates from Southeastern part of Democratic Republic of Congo following a 4,375 km semi-circular path to Atlantic, with average annual discharge of 40,200 m3/s. It is expected that the wetland hydraulics vary along the middle reach of the Congo River, including the floodplains with distinct boundary from the Kisangani to the intersection between the mainstem and the Lulonga River, and the vast wetlands in the Cuvette Centrale. In this study, we will use repeat-pass multi-temporal interferometric SAR measurement from ALOS PALSAR data to investigate spatial and temporal variations of dh/dt and examine how the dh/dt patterns are related to topographic relief from SRTM DEM. Early results over the wetlands in the Cuvette Centrale show that two distinct dh/dt patterns exist: rapid changes of dh/dt perpendicular to a narrow band of floodplains along the mainstem, and slow and diffuse dh/dt changes over the interfluvial wetlands. It indicates that the hydrodynamics of the interfluvial wetlands cannot be governed by the fluvial process of river-floodplain exchange. Comparison of dh/dt patterns over the Cuvette Centrale and the upper middle reach of the Congo River will enable us to understand how their wetlands and floodplains are filled and drained during high-water and low-water seasons. JF - American Geophysical Union Fall Meeting AU - Yuan, Ting AU - Lee, H AU - Jung, Hahn Chul AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GC53B EP - 0535 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734266102?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Wetland+hydraulics+along+the+middle+reach+of+the+Congo+River+revealed+by+repeat-pass+multi-temporal+interferometric+SAR&rft.au=Yuan%2C+Ting%3BLee%2C+H%3BJung%2C+Hahn+Chul%3BAnonymous&rft.aulast=Yuan&rft.aufirst=Ting&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 - Regional groundwater storage changes in the Indian Subcontinent; the role of anthropogenic activities AN - 1734266071; 2015-111937 AB - A large number of people around the globe depend on groundwater as a source of fresh water. Groundwater dependence will be further intensified by the world's exponentially increasing population and climate change. Therefore, quantification of groundwater storage (GWS) changes is a critical issue in the densely populated regions of the world. Approximately, 90% of groundwater withdrawals are associated with irrigational activities in the Indian subcontinent. We used a combination of Gravity Recovery and Climate Experiment (GRACE) observations, hydrological data from the Global Land Data Assimilation System (GLDAS) together with groundwater level measurements and ERA-Interim precipitation, for the period 2003-2012 to estimate regional GWS changes and to regionally evaluate the anthropogenic and climatic forcing control on the observed changes. Rapid GWS depletion (>10 mm/year) has been observed in the northern and eastern parts of the Indian subcontinent. Most of the groundwater depleted regions coincide with the highly fertile alluvial aquifers of Ganges-Brahmaputra basin, which is subjected to intense groundwater withdrawals associated with crop irrigation. Our GWS change estimates are consistent with ground-based water level measurements (n>13,000) from the region. Over this ten year period, GWS data show little to moderate replenishments in southern and western regions of Indian subcontinent, probably because of advanced water resource management in these areas. Precipitation is the key factor controlling the renewability of groundwater resources, however, precipitation during the period was generally near normal to historical levels, suggesting strong anthropogenic influence on GWS change in the northern and eastern parts of India during the study period. JF - American Geophysical Union Fall Meeting AU - Bhanja, Soumendra N AU - Mukherjee, A AU - Rodell, Matthew AU - Velicogna, Isabella AU - Pangaluru, K AU - Famiglietti, J S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract GC21B EP - 0533 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734266071?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+groundwater+storage+changes+in+the+Indian+Subcontinent%3B+the+role+of+anthropogenic+activities&rft.au=Bhanja%2C+Soumendra+N%3BMukherjee%2C+A%3BRodell%2C+Matthew%3BVelicogna%2C+Isabella%3BPangaluru%2C+K%3BFamiglietti%2C+J+S%3BAnonymous&rft.aulast=Bhanja&rft.aufirst=Soumendra&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 - Detection of aseismic geodetic transients using k-nearest neighbors AN - 1734264996; 2015-108885 AB - Observation and detection of aseismic transient signals in geodetic data is an important part of improving understanding of the earthquake cycle. Recent work, conducted as part of the Southern California Earthquake Center's transient detection exercise, showed that transient detection results were improved by using multiple detection methods and by localizing results to specified geographical regions. While geographical regions can be defined on the basis of a priori science domain knowledge, regions defined in such a way are vulnerable to edge effects (i.e., observations collected near the region boundary are less reliable) and are not easily extendable to new regions or measurement modalities where a priori understanding is limited. We present an approach to overcoming these challenges that utilizes a k-nearest neighbor approach to defining geographical regions for GPS stations. In this approach, each station has its own individual region, defined by a chosen number k closest neighboring stations rather than any predefined geographical boundary. In this general framework, a weighting function controls the contributions of neighboring stations to the transient detection, while a distance function (e.g., Vincenty's method) controls which k stations are considered neighbors. The "proper" k depends both on the transient detection method and the weighting function; it can be defined by the user directly or optimized using hyperparameter optimization. For transient detection using multiple detection methods, this framework nests readily within an ensemble classifier. JF - American Geophysical Union Fall Meeting AU - Granat, R A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NG23A EP - 3795 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/1734264996?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Detection+of+aseismic+geodetic+transients+using+k-nearest+neighbors&rft.au=Granat%2C+R+A%3BAnonymous&rft.aulast=Granat&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Ionospheric signatures of North Korean nuclear test on 12 February 2013 AN - 1734264584; 2015-108945 AB - Previous studies on interactions between the atmospheric waves and ionospheric perturbations concluded that the acoustic-gravity waves triggered by solid earth events such as earthquakes, tsunamis and underground nuclear tests may be used in detecting the ionospheric perturbations. Ionospheric perturbations have been observed using sounding radars and GPS remote sensing techniques since 1970s. As primary examples, ionospheric disturbances associated with 2006 and 2009 North Korean underground nuclear tests were observed using GPS measurements. In this work, we processed GNSS stations in South Korea and Japan and analyzed traveling ionospheric disturbances that were coincident with the 2013 North Korean underground test. North Korea conducted the third underground nuclear test at 2:57 UTC on February 12, 2013. The magnitude of earthquake generated by this event was registered to be an Mw 5.1 event. After analyzing GPS measurements from nearby stations, strong ionospheric perturbations were observed 15-30 minutes after the reported event, and the disturbances were shown to have primarily two different wave trains. The maximum VTEC perturbations turned out to be between 0.4 to 0.7 TECU. Five stations located in the northwest-to-southeast direction were also scrutinized for the propagation direction and amplitude variation related to ionospheric wave structures. The results clearly showed that the maximum amplitude of the waves may be higher as the stations are closer to the epicenter indicating that the waveforms may propagate away from the epicenter. In this research, we will analyze the characteristics of the detected ionospheric perturbations associated with the underground nuclear test. These findings are expected to verify our modeling results. We hope to get a better understanding of the influence of man-made hazards on the temporal and spatial variability of the global ionosphere. JF - American Geophysical Union Fall Meeting AU - Yoon, M AU - Kim, D AU - Yang, Y M AU - Lee, Jiyun AU - Komjathy, Attila AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH31C EP - 3881 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/1734264584?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Ionospheric+signatures+of+North+Korean+nuclear+test+on+12+February+2013&rft.au=Yoon%2C+M%3BKim%2C+D%3BYang%2C+Y+M%3BLee%2C+Jiyun%3BKomjathy%2C+Attila%3BAnonymous&rft.aulast=Yoon&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 - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Single-pass airborne InSAR for wide-swath, high-resolution cryospheric surface topography mapping AN - 1734264343; 2015-108864 AB - In May 2009 a mm-wave single-pass interferometric synthetic aperture radar (InSAR) for the first time demonstrated ice surface topography swath-mapping in Greenland. This was achieved with the airborne Glacier and Ice Surface Topography Interferometer (GLISTIN-A). Ka-band (35.6GHz) was chosen for high-precision topographic mapping from a compact sensor with minimal surface penetration. In recent years, the system was comprehensively upgraded for improved performance, stability and calibration. In April 2013, after completing the upgrades, GLISTIN-A flew a brief campaign to Alaska. The primary purpose was to demonstrate the InSAR's ability to generate high-precision, high resolution maps of ice surface topography with swaths in excess of 10km. Comparison of GLISTIN-A's elevations over glacial ice with lidar verified the precision requirements and established elevation accuracies to within 2 m without tie points. Feature tracking of crevasses on Columbia Glacier using data acquired with a 3-day separation exhibit an impressive velocity mapping capability. Furthermore, GLISTIN-A flew over the Beaufort sea to determine if we could not only map sea ice, but also measure freeboard. Initial analysis has established we can measure sea-ice freeboard using height differences from the top of the sea-ice and the sea surface in open leads. In the future, a campaign with lidar is desired for a quantitative validation. Another proof-of-concept collection mapped snow-basins for hydrology. Snow depth measurements using summer and winter collections in the Sierras were compared with lidar measurements. Unsurprisingly when present, trees complicate the interpretation, but additional filtering and processing is in work. For each application, knowledge of the interferometric penetration is important for scientific interpretation. We present analytical predictions and experimental data to upper bound the elevation bias of the InSAR measurements over snow and snow-covered ice. JF - American Geophysical Union Fall Meeting AU - Moller, D AU - Hensley, S AU - Wu, X AU - Muellerschoen, R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G53A EP - 01 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734264343?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Single-pass+airborne+InSAR+for+wide-swath%2C+high-resolution+cryospheric+surface+topography+mapping&rft.au=Moller%2C+D%3BHensley%2C+S%3BWu%2C+X%3BMuellerschoen%2C+R%3BAnonymous&rft.aulast=Moller&rft.aufirst=D&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Measurement and modeling of cryosphere-geosphere interactions in south central Alaska AN - 1734264285; 2015-108813 AB - In south central Alaska large cryosphere fluctuations occur on a variety of temporal and spatial scales in a region of upper crustal faulting and folding associated with collision and accretion of the Yakutat terrane. Over the last decade (2002-present) the Gravity Recovery and Climate Experiment (GRACE) gravity measurements from southern Alaska indicate region-specific trends of annual mass loss and large variable seasonal mass fluctuations. Unraveling the various geophysical signals within GRACE and continuous GPS data, as well as earlier campaign GPS data, has required acquiring geodetic constraints on changes in the cryosphere from satellite, aircraft, and in situ data. At broad spatial scales, short-term atmospheric loading corrections are important as well. On a more local scale, we use snow accumulation profiles from Larson's GPS reflectometry, SNOTEL sites, and MODIS derived melt onset/refreeze timing to estimate the magnitude and timing of seasonal cryosphere loading and unloading. The regional GRACE trends need to be corrected for the rheological response to century time-scale ice mass loss as well. Our numerical modeling of the solid Earth response to cryosphere changes and earthquakes includes use of simple elastic models, regional finite element modeling with PyLith and a global normal model approach. For instance, our calculations predict the region specific GRACE trends due to ongoing mass change associated with viscoelastic relaxation following the 1964 and other earthquakes. JF - American Geophysical Union Fall Meeting AU - Sauber, J M AU - Han, S C AU - Luthcke, S B AU - Ruppert, N A AU - Bruhn, R L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract G51A EP - 0338 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/1734264285?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Measurement+and+modeling+of+cryosphere-geosphere+interactions+in+south+central+Alaska&rft.au=Sauber%2C+J+M%3BHan%2C+S+C%3BLuthcke%2C+S+B%3BRuppert%2C+N+A%3BBruhn%2C+R+L%3BAnonymous&rft.aulast=Sauber&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 - 2015-11-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Water content in the SW USA mantle lithosphere; FTIR analysis of Dish Hill and Kilbourne Hole pyroxenites AN - 1729848358; 2015-103926 AB - Kilbourne Hole (NM, USA) and Dish Hill (CA, USA) mantle xenoliths sample continental mantle in two different tectonic settings. Kilbourne Hole (KH) is located in the Rio Grande Rift. Dish Hill (DH) is located in the southern Mojave Province, an area potentially affected by subduction of the Farallon Plate beneath North America [1]. FTIR analyses were obtained on well characterized pyroxenite, dunite and wehrlite xenoliths, thought to represent crystallized melts at mantle depths. PUM normalized REE patterns of the KH bulk-rocks are slightly LREE enriched and consistent with those of liquids generated by 6% melting of a spinel peridotite source. Pyroxenite pyroxenes have no detectable water but one DH wehrlite, which bulk-rock is LREE enriched, has 4 ppm H2O in orthopyroxene and 2 Ga [5]. The Farallon subduction appears to have enriched in water the Southwestern United States lithospheric mantle further east than DH, beneath the Colorado plateau [6]. [1] Atwater, 1970 Tectonophysics 31, 145-165. [2] Shaw, 2000 CM 38, 1041-1064. [3] Schaffer et al., 2013 AGU Fall Meeting. [4] Luffi et al, 2009 JGR 114, 1-36. [5] Armytage et al., 2013 GCA 137, 113-133. [6] Li et al., 2008 JGR 113, 1-22. JF - American Geophysical Union Fall Meeting AU - Gibler, R AU - Peslier, A H AU - Schaffer, L A AU - Brandon, A D AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract DI21A EP - 4260 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/1729848358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Water+content+in+the+SW+USA+mantle+lithosphere%3B+FTIR+analysis+of+Dish+Hill+and+Kilbourne+Hole+pyroxenites&rft.au=Gibler%2C+R%3BPeslier%2C+A+H%3BSchaffer%2C+L+A%3BBrandon%2C+A+D%3BAnonymous&rft.aulast=Gibler&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Astronomy and geology vocabulary, i.e. "NASA words" in Native American languages AN - 1729848212; 2015-103963 AB - The US Rosetta Project has developed a program in Native American communities in which contemporary STEM vocabulary is taught alongside the same vocabulary in Navajo. NASA images and science are used and described in the native language, alongside both lay English, and scientific English. Additionally, science curriculum (geology/chemistry/botany/physics) elements drawn from the reservation environment, including geomorphology, geochemistry, soil physics, are included and discussed in the native language as much as possible - with their analogs in other planetary environments (such as Mars). The program began with a student defining 30 Navajo words to describe what he called 'NASA' words, such as: cell phone, astronaut, space suit, computer, and planets not visible to the naked eye. The use of NASA material and imagery have a positive impact on the accessibility of the overall STEM material but community involvement, and buy-in, is critical to the success of the program. The US Rosetta Project modified its goals, and curriculum, to accommodate the programmatic desires of teachers in the district, and the capabilities of the medicine men that agreed to participate. In this presentation we will report on lessons learned, as well as metrics and successes associated with our most recent Summer Science Academy [2014]. JF - American Geophysical Union Fall Meeting AU - Angrum, A AU - Alexander, C J AU - Martin, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract ED51A EP - 3415 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729848212?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Astronomy+and+geology+vocabulary%2C+i.e.+%22NASA+words%22+in+Native+American+languages&rft.au=Angrum%2C+A%3BAlexander%2C+C+J%3BMartin%2C+M%3BAnonymous&rft.aulast=Angrum&rft.aufirst=A&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - What can we learn from the paleo-records about future Arctic climate change? AN - 1729845896; 2015-101373 AB - The Coupled Model Intercomparison Project, Phase 5 (CMIP5), include historical simulations from the 20th century, future climate simulations following different Representative Concentration Pathways (RCPs) for the 21st century and beyond, and, for the first time in CMIP, three sets of paleo-climate simulations of the recent past for which more paleo-proxi-data exist. We use simulations of the Mid-Holocene (MH) climate (6K BP) from General Circulation Models participating in CMIP5 to constrain future projections of Arctic climate change by the same models. During the Mid-Holocene, the Arctic received approximately 50 W/m2 more solar radiation at the top of the atmosphere during summer, a similar increase to what is projected from greenhouse gas forcing for the middle of the 21st century. The constraint in our analysis arise from a measure of the ability of GCMs to hindcast MH climate using a suite of both land paleo-records--which are much more abundant for high latitudes than ocean proxy--and ocean paleo-record. Results show that GCMs with skill at simulating the MH climate and today's climate give more realistic future projections of the sea ice decline in forced climate simulations of the 21st century participating in the IPCC-AR5. JF - American Geophysical Union Fall Meeting AU - Tremblay, Bruno AU - Huard, D B AU - Schmidt, G A AU - de Vernal, Anne AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP21G 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/1729845896?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=What+can+we+learn+from+the+paleo-records+about+future+Arctic+climate+change%3F&rft.au=Tremblay%2C+Bruno%3BHuard%2C+D+B%3BSchmidt%2C+G+A%3Bde+Vernal%2C+Anne%3BAnonymous&rft.aulast=Tremblay&rft.aufirst=Bruno&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 - Influence of interhemispheric asymmetry in volcanic forcing on ITCZ location and oxygen isotope distribution AN - 1729844866; 2015-101384 AB - Volcanic eruptions are a dominant source of natural forced variability during the Common Era. Although transient, eruptions strongly cool the planet through the liberation of sulfur gases that enter the stratosphere (converting to sulfate aerosol) and scatter sunlight. In particular, such events source the largest amplitude radiative forcings that perturb the terrestrial climate during the Last Millennium. Previous studies have highlighted the global climate impact of large volcanic events, including the role of latitude and time-of-year of a given eruption. Here, we focus on the influence of hemispheric asymmetry in Aerosol Optical Depth (AOD) and its projection onto the tropical hydrologic cycle. This is assessed using a suite of simulations from a fully coupled isotope-enabled General Circulation Model (NASA GISS ModelE2-R) run from 850-2005 CE. This study builds upon prior work that demonstrate the role of inter-hemispheric forcing gradients on Intertropical Convergence Zone (ITCZ) location. In addition to unveiling the physical mechanisms that alter tropical hydroclimate, we highlight the anticipated tropical oxygen isotope distribution following large eruptions. Thus, through the vehicle of an isotope-enabled model, we formulate a potentially falsifiable prediction for how volcanic forcing may manifest itself in high-resolution proxies across the tropics. JF - American Geophysical Union Fall Meeting AU - Colose, C AU - LeGrande, A N AU - Vuille, M F AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP22A EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729844866?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Influence+of+interhemispheric+asymmetry+in+volcanic+forcing+on+ITCZ+location+and+oxygen+isotope+distribution&rft.au=Colose%2C+C%3BLeGrande%2C+A+N%3BVuille%2C+M+F%3BAnonymous&rft.aulast=Colose&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 - Why were past North Atlantic warming conditions associated with drier climate in the Western United States? AN - 1729844825; 2015-101370 AB - Investigating climate dynamics governing rainfall over the Western US during past warmings and coolings of the last glacial and deglaciation is pertinent to understanding how precipitation patterns might change with future global warming, especially as the processes driving the global hydrological reorganization affecting this drought-prone region during these rapid temperature changes remain unresolved. We present model climates of the Bolling warm event (14,500 years ago) and Younger Dryas cool event (12,200 years ago) that i) uniquely enable the assessment of dueling hypothesis about the atmospheric teleconnections responsible for abrupt temperature shifts in the North Atlantic region to variations in moisture conditions across the Western US, and ii) show that existing hypotheses about these teleconnections are unsupported. Modeling results show no evidence for a north-south shift of the Pacific winter storm track, and we argue that a tropical moisture source with evolving trajectory cannot explain alternation between wet/dry conditions, which have been reconstructed from the proxy record. Alternatively, model results support a new hypothesis that variations in the intensity of the winter storm track, corresponding to its expansion/contraction, can account for regional moisture differences between warm and cool intervals of the last deglaciation. Furthermore, we demonstrate that the mechanism forcing the teleconnection between the North Atlantic and Western US is the same across different boundary conditions. In our simulation, during the last deglaciation, and in simulations of future warming, perturbation of the Rossby wave structure reconfigures the atmospheric state. This reconfiguration affects the Aleutian Low and high-pressure ridge over and off of the northern North American coastline driving variability in the storm track. Similarity between the processes governing the climate response during these distinct time intervals illustrates the robust nature of the teleconnection, a novel result that provides context for understanding the climate processes governing the response of moisture variability to future climate change. JF - American Geophysical Union Fall Meeting AU - Wong, C I AU - Potter, G L AU - Montanez, I P AU - Otto-Bliesner, B L AU - Behling, P AU - Oster, J L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP21F EP - 08 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/1729844825?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Why+were+past+North+Atlantic+warming+conditions+associated+with+drier+climate+in+the+Western+United+States%3F&rft.au=Wong%2C+C+I%3BPotter%2C+G+L%3BMontanez%2C+I+P%3BOtto-Bliesner%2C+B+L%3BBehling%2C+P%3BOster%2C+J+L%3BAnonymous&rft.aulast=Wong&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 - Decadal drought and wetness reconstructed for subtropical North America in the mexican drought atlas AN - 1729844788; 2015-101358 AB - A new drought atlas has been developed for subtropical North America, including the entire Republic of Mexico. This Mexican Drought Atlas (MXDA) is based on 251 tree-ring chronologies, including 82 from Mexico and another 169 from the Southern U.S. and western Guatemala. Point-by-point principal components regression was used to reconstruct the self-calibrating Palmer Drought Severity Index (PDSI) for June-August. Calibration and verification statistics were improved over what was previously possible with the North American Drought Atlas, which was based on fewer chronologies only in Mexico. The MXDA will be served on the web with analytical tools for composite, correlation, and congruence analyses. The new PDSI reconstructions provide a more detailed estimation of decadal moisture regimes over the past 2000 years, but are most robust after 1400 AD, when several chronologies are available across Mexico. Droughts previously identified in a subset of chronologies are confirmed and their spatial impact quantified in the new reconstructions. This includes the intense drought of the mid-15th Century described in Aztec legend, the 16th century megadrought, and "El Ano del Hambre", one of the worst famines in Mexican history. We also use the best replicated portion of the MXDA in the 18th and 19th centuries to reconstruct moisture anomalies during key time periods of Mexican turmoil (e.g., the Mexican War of Independence). JF - American Geophysical Union Fall Meeting AU - Burnette, D J AU - Stahle, D W AU - Cook, E R AU - Villanueva Diaz, J AU - Griffin, D AU - Cook, B AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP21E 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/1729844788?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Decadal+drought+and+wetness+reconstructed+for+subtropical+North+America+in+the+mexican+drought+atlas&rft.au=Burnette%2C+D+J%3BStahle%2C+D+W%3BCook%2C+E+R%3BVillanueva+Diaz%2C+J%3BGriffin%2C+D%3BCook%2C+B%3BAnonymous&rft.aulast=Burnette&rft.aufirst=D&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Upper limits on geomagnetic field model errors using geomagnetic data assimilation AN - 1729844573; 2015-101242 AB - Recent advances in geomagnetic data assimilation have led to improvements in forecasting of the geomagnetic field. Validation of the data assimilation system (DAS) has been done for historical data from the past 400 years by comparing differences between observations and forecasts (O-F) at the CMB. However, this approach is limited by the lack of knowledge about the accuracy of the observations, which come from geomagnetic field models (GFM). But we can also use geomagnetic data assimilation to estimate upper limits on GFM uncertainty by making some simplifying assumptions. We show that large forecast biases, which degrade the optimality of the assimilation, can be easily removed. This leaves just the much smaller random component of the forecast uncertainty and the remaining (O-F) from which it is much easier to the extract a maximum value for the observation uncertainty. JF - American Geophysical Union Fall Meeting AU - Tangborn, A AU - Kuang, W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract DI31B EP - 4282 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/1729844573?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+limits+on+geomagnetic+field+model+errors+using+geomagnetic+data+assimilation&rft.au=Tangborn%2C+A%3BKuang%2C+W%3BAnonymous&rft.aulast=Tangborn&rft.aufirst=A&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Impact of uncertainty of boundary conditions on simulations of the last millennium AN - 1729844471; 2015-101355 AB - Goddard Institute for Space Studies (GISS)-E2-R sampled the broadest range of boundary conditions for simulations of the last millennium, with a dozen different experiments sampling three different volcanic forcing scenarios, three anthropogenic land use change scenarios, and three different solar (TSI) scenarios. This suite of experiment yields 15,000 years of simulations for the last millennium. Here the forcings of these experiments are distilled down into basic fingerprints of each type of change--volcanic, solar, and, anthropogenic land use--to test whether it is feasible to detect these climate changes in various proxy archives. I will illustrate the difficulty in the detection of any of these changes in individual proxy archives, and establish the minimum critieria (given a perfect simulation) to identify solar minima, volcanic eruptions, and large changes in land use. Further, preliminary new results to illustrate the impact of various degrees of sophistication in applying volcanic forcing on the resultant climate signal will be presented. We will also study the impact of atmospheric composition on climate, by presenting results from atmosphere-only model simulations with the GISS-E2 model, which includes interactive gas-phase chemistry and aerosols at decadal-scale time slices, driven by the millennial-length coupled atmosphere-ocean simulations. JF - American Geophysical Union Fall Meeting AU - LeGrande, A N AU - Tsigaridis, K AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP21E EP - 01 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/1729844471?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+uncertainty+of+boundary+conditions+on+simulations+of+the+last+millennium&rft.au=LeGrande%2C+A+N%3BTsigaridis%2C+K%3BAnonymous&rft.aulast=LeGrande&rft.aufirst=A&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Model-data comparisons of pan-continental drought over North America during the Common Era AN - 1729844442; 2015-101361 AB - Pan-continental droughts, or droughts that simultaneously affect a large percentage of the geographically and climatically distinct regions of North America, present significant on-the-ground management challenges and, as such, are an important target for scientific research. There are, however, two fundamental reasons why a comprehensive characterization of pan-continental droughts, and their causes, proves challenging: 1) Regional hydroclimate in North America is characterized by distinct atmosphere-ocean dynamics; 2) The relative rarity of pan-continental drought and the short ( approximately 150 year) observational record mean that there are few events by which to diagnose how these relatively distinct regional hydroclimate dynamics can combine to produce pan-continental drought. The paradigm of model-data comparisons on paleoclimatic timescales is used herein to extend the North American drought record and to simulate potential atmosphere-ocean states during pan-continental droughts, which together provide a more comprehensive understanding of pan-continental drought dynamics. Specifically, six forced transient simulations of the last millennium from the CMIP5/PMIP3 archives are analyzed in conjunction with gridded tree-ring reconstructions of hydroclimate variability from the North American Drought Atlas (NADA). Models are found to simulate pan-continental drought with the frequency and spatial patterns exhibited by the NADA. They do not, however, agree on the modes of atmosphere-ocean variability that produce pan-continental droughts. This is because simulated ENSO, PDO and AMO dynamics, and their teleconnections to North America, are different between models and observations. Despite these dynamical differences, models are also able to reproduce large-magnitude centennial-scale variability in the frequency of pan-continental drought occurrence-an important feature of the paleoclimate record. These changes do not appear to be tied to exogenous forcings, suggesting that simulated internal hydroclimate variability on these timescales is large in magnitude. Results both clarify understanding of the dynamics that produce real-world pan-continental droughts, while assessing the ability of models to accurately characterize future drought risks. JF - American Geophysical Union Fall Meeting AU - Coats, S AU - Smerdon, J E AU - Seager, R AU - Cook, B AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP21E EP - 07 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/1729844442?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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-data+comparisons+of+pan-continental+drought+over+North+America+during+the+Common+Era&rft.au=Coats%2C+S%3BSmerdon%2C+J+E%3BSeager%2C+R%3BCook%2C+B%3BAnonymous&rft.aulast=Coats&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 - Assimilation of the observed SV with geodynamo modeling and sensitivities of the core flow beneath the CMB AN - 1729844400; 2015-101241 AB - One challenge in geomagnetic data assimilation is that the observational records are relatively short: they are approximately 6 times to the typical time scales of non-dipole geomagnetic field, and approximately 10 times to that of the dipole field. However, surface geomagnetic observations are made at time scales at least three orders of magnitude shorter than those of the geomagnetic secular variation. Therefore, the field and its secular variation (SV), i.e. the rate of changes in time, are "concurrently" measured, allowing us to assimilate both pieces of information into geodynamo modeling. This can be achieved via construction of a new observation operator for the velocity field beneath the CMB, and modification of the existing observation operator for the magnetic field. Determination of the observation operator for the velocity field is very complex, as the constraints from the observed SV are two orders of magnitude less than the velocity field state variables in dynamo simulation. Therefore, it depends on appropriate understanding of the responses of the core flow to the observed SV. For this purpose, we carried out several assimilation experiments with and without assimilation of SV. In particular, the observed SV is only utilized for correcting the model forecasts in the magnetic field, leaving the velocity field forecast unconstrained. Our experiment shows that, the large-scale axisymmetric toroidal velocity responds the strongest to the observed SV, following by a suite of small-scale velocity components (with the span from spherical harmonic degree 10 to 20). The non-axisymmetric part of the poloidal flow is also very sensitive to the SV constraints. However, such responses are more evenly spread out from large to small-scale flow patterns. These assimilation results will be used for construction of the velocity field observational operator, and can be also applied to core-flow inversion studies in general. JF - American Geophysical Union Fall Meeting AU - Kuang, W AU - Tangborn, A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract DI31B EP - 4281 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/1729844400?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Assimilation+of+the+observed+SV+with+geodynamo+modeling+and+sensitivities+of+the+core+flow+beneath+the+CMB&rft.au=Kuang%2C+W%3BTangborn%2C+A%3BAnonymous&rft.aulast=Kuang&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 - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Fostering outreach, education and exploration of the Moon using the lunar mapping & modeling portal AN - 1722155597; 2015-100122 AB - The Lunar Mapping and Modeling Portal (LMMP), is a web-based Portal and a suite of interactive visualization and analysis tools for users to access mapped lunar data products (including image mosaics, digital elevation models, etc.) from past and current lunar missions (e.g., Lunar Reconnaissance Orbiter, Apollo, etc.). Originally designed as a mission planning tool for the Constellation Program, LMMP has grown into a generalized suite of tools facilitating a wide range of activities in support of lunar exploration including public outreach, education, lunar mission planning and scientific research. LMMP fosters outreach, education, and exploration of the Moon by educators, students, amateur astronomers, and the general public. These efforts are enhanced by Moon Tours, LMMP's mobile application, which makes LMMP's information accessible to people of all ages, putting opportunities for real lunar exploration in the palms of their hands. Our talk will include an overview of LMMP and a demonstration of its technologies (web portals, mobile apps), to show how it serves NASA data as commodities for use by advanced visualization facilities (e.g., planetariums) and how it contributes to improving teaching and learning, increasing scientific literacy of the general public, and enriching STEM efforts. JF - American Geophysical Union Fall Meeting AU - Dodge, Kyle L AU - Law, Emily S AU - Malhotra, Shantanu AU - Chang, George W AU - Kim, Richard M AU - Bui, Bach X AU - Sadaqathullah, Syed AU - Day, Brian H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract ED33C EP - 01 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/1722155597?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Fostering+outreach%2C+education+and+exploration+of+the+Moon+using+the+lunar+mapping+%26amp%3B+modeling+portal&rft.au=Dodge%2C+Kyle+L%3BLaw%2C+Emily+S%3BMalhotra%2C+Shantanu%3BChang%2C+George+W%3BKim%2C+Richard+M%3BBui%2C+Bach+X%3BSadaqathullah%2C+Syed%3BDay%2C+Brian+H%3BAnonymous&rft.aulast=Dodge&rft.aufirst=Kyle&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 - Requirements for energy-conserving two-way coupling of a GCM and ice model AN - 1722154963; 2015-097635 AB - Many questions still surround how ice sheets respond to climate forcing and how those changes will affect sea level, regional and global climate. Past studies with one-way coupling have yielded useful insight into the future of present-day ice sheets. More recently, studies have used two-way coupling that conserves mass but not energy, in order to better understand possible future equilibrium states of the ice sheets and climate system. Two-way coupling that preserves mass and energy is seen a prerequisite to effective modeling of ice sheet that probably play a significant role in many events in the paleo record: Dansgaard-Oeschger events, Heinrich events, the Younger Dryas. It may also be used to estimate errors inherent in two-way coupled strategies that do not conserve energy. The need for energy conservation puts constraints on the GCM, the ice model, and the design of the coupler. Details of these requirements are presented as they are being implemented in the coupling of GISS ModelE with the PISM and ISSM ice sheet models, via the Glint2 coupler. JF - American Geophysical Union Fall Meeting AU - Fischer, Robert AU - Nowicki, Sophie AU - Kelley, Maxwell AU - Schmidt, Gavin A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C51A EP - 0249 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/1722154963?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Requirements+for+energy-conserving+two-way+coupling+of+a+GCM+and+ice+model&rft.au=Fischer%2C+Robert%3BNowicki%2C+Sophie%3BKelley%2C+Maxwell%3BSchmidt%2C+Gavin+A%3BAnonymous&rft.aulast=Fischer&rft.aufirst=Robert&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 - Ice-cover history and paleoceanographic change of the western Arctic Ocean (Mendeleev Ridge) using Be isotopes AN - 1722154386; 2015-097680 AB - A new investigation of paleoclimate and environmental changes using beryllium isotopes in sediment from the Mendeleev Ridge of the western Arctic Ocean was accomplished using a 39 cm-long box core record. The age of core PS72/396-3 appears to date back to MIS 5.d based on the stratigraphy of beryllium isotopes and paleomagnetic data and other isotopic data of this study, AMS 14C ages and oxygen and carbon isotopes of planktonic foraminifera N. pachyderma sin. Both authigenic 10Be and 9Be records show that there are three major cold periods during MIS 5.d and reveals a much longer warm period after the second cold period based on 9Be record. The 10Be stratigraphy also reveals a paleomagnetic excursion at 45 kyr which is comparable to other records. At depths from 22 to 25 cm, the lowest 10Be signal may be due to the highest paleomagnetic intensity, which is indicated as an age of 75 kyr from other records. However, a reduction in cosmogenic 10Be could be due to ice cover, and is correlated with delta 18O evidence of a cold period. Interestingly, 9Be data show that constant input of 9Be to the Mendeleev Ridge is observed for this time period. During this time period, TOC (%) values also show a similar pattern. The record of authigenic 9Be is inversely correlated to that of Ca and proportional to opal production. These observations confirm that 9Be can also be a good proxy as a climatic tracer. This study may be a useful approach for understanding Arctic climate change. JF - American Geophysical Union Fall Meeting AU - Kim, K J AU - Jull, A J T AU - Nam, S I AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C53A EP - 0298 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/1722154386?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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-cover+history+and+paleoceanographic+change+of+the+western+Arctic+Ocean+%28Mendeleev+Ridge%29+using+Be+isotopes&rft.au=Kim%2C+K+J%3BJull%2C+A+J+T%3BNam%2C+S+I%3BAnonymous&rft.aulast=Kim&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 - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - Radar detections of buried supraglacial lakes across the Greenland ice sheet AN - 1722154133; 2015-097645 AB - Surface melt over the Greenland Ice Sheet (GrIS) is increasing and estimated to account for half or more of the total mass loss. Little, however, is known about the hydrologic pathways that route surface melt within the ice sheet. Radar imaging provides a tool to investigate the englacial water storage and pathways across the GrIS. Here, we present data from the Center for Remote Sensing of Ice Sheets' radars flown by NASA's Operation IceBridge (OIB). OIB flights occur in the spring, before significant GrIS melt. The airborne radar echograms collected in the supraglacial lake regions show a unique attenuation signal attributed to over-winter storage of water, referred to here as buried lakes. The Snow Radar ( approximately 2-8 Ghz), that images the top 10's of meters of the ice sheet at high vertical resolution in the snow/firn ( approximately 4 cm), is used to map the spatial extent and depth of the retained water along OIB flight lines from 2009-2012. The buried lakes are distributed extensively around the margin of the GrIS. The subsurface water can persist through multiple winters and is, on average, approximately 4.2+0.4 m below the surface. Most buried lakes have no visible surface expression at the time of overflight but the few buried lakes that are visible have a unique visible signature associated with a darker blue color where subsurface water is located. The volume of retained water in the buried lakes is small compared to the total mass loss from the GrIS but the water will have important implications locally for the development of the englacial hydrologic network, ice temperature profiles and glacial dynamics. The buried lakes represent a year-round source of meltwater in the GrIS englacial hydrologic system. JF - American Geophysical Union Fall Meeting AU - Koenig, Lora S AU - Lampkin, D J AU - Montgomery, L AU - Hamilton, Sara AU - Joseph, C A AU - Moustafa, Samiah AU - Panzer, B AU - Casey, Kimberly AU - Paden, J D AU - Leuschen, C AU - Gogineni, S AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C51C EP - 06 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/1722154133?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Radar+detections+of+buried+supraglacial+lakes+across+the+Greenland+ice+sheet&rft.au=Koenig%2C+Lora+S%3BLampkin%2C+D+J%3BMontgomery%2C+L%3BHamilton%2C+Sara%3BJoseph%2C+C+A%3BMoustafa%2C+Samiah%3BPanzer%2C+B%3BCasey%2C+Kimberly%3BPaden%2C+J+D%3BLeuschen%2C+C%3BGogineni%2C+S%3BAnonymous&rft.aulast=Koenig&rft.aufirst=Lora&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 - WISSARD at Subglacial Lake Whillans, West Antarctica; scientific operations and initial observations AN - 1722153121; 2015-097654 AB - Subglacial Lake Whillans (SLW) is a shallow subglacial water reservoir covered by 800 m of ice. A custom-built hot-water drill was used to access SLW in a microbiologically clean way in late January 2013. Lake access for sampling and in-situ measurements was maintained for a total of 3 days. We deployed an array of scientific tools through a large diameter borehole: a downhole camera, a conductivity-temperature-depth (CTD) probe, a Niskin water sampler, an in situ filtration unit, three different sediment corers, a geothermal probe and a geophysical sensor string. We confirm the existence of a subglacial water body whose presence was inferred from satellite altimetry and surface geophysics. Subglacial water is about two orders of magnitude less saline than sea water (0.37-0.41 psu vs 35 psu) and two orders of magnitude more saline than pure drill meltwater (<0.002 psu). It reaches a minimum temperature of -0.55 degrees C, consistent with depression of the freezing point by pressure from ca. 800 m of ice. Subglacial remained turbid throughout the observation period. The recovered sediment cores contained a macroscopically structureless diamicton with shear strength between 2 and 6 kPa. Our recommendation for future subglacial access through water-filled boreholes in cold ice is to supply heat to the top of the borehole to keep it from freezing. Development of a centimeters-thick ice layer on top of the borehole water column prevented deployment of some light borehole tools. JF - American Geophysical Union Fall Meeting AU - Tulaczyk, S M AU - Mikucki, J AU - Siegfried, M R AU - Priscu, J C AU - Barcheck, C G AU - Beem, L H AU - Behar, Alberto AU - Burnett, J AU - Christner, B C AU - Fisher, A T AU - Fricker, H A AU - Mankoff, K D AU - Powell, Ross D AU - Rack, F R AU - Sampson, D AU - Scherer, Reed P AU - Schwartz, S Y AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C52A EP - 07 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/1722153121?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=WISSARD+at+Subglacial+Lake+Whillans%2C+West+Antarctica%3B+scientific+operations+and+initial+observations&rft.au=Tulaczyk%2C+S+M%3BMikucki%2C+J%3BSiegfried%2C+M+R%3BPriscu%2C+J+C%3BBarcheck%2C+C+G%3BBeem%2C+L+H%3BBehar%2C+Alberto%3BBurnett%2C+J%3BChristner%2C+B+C%3BFisher%2C+A+T%3BFricker%2C+H+A%3BMankoff%2C+K+D%3BPowell%2C+Ross+D%3BRack%2C+F+R%3BSampson%2C+D%3BScherer%2C+Reed+P%3BSchwartz%2C+S+Y%3BAnonymous&rft.aulast=Tulaczyk&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 - Recent results on the Greenland Aquifer from remote sensing and in situ measurements AN - 1718054184; 2015-095706 AB - The accelerating loss of mass from the Greenland ice sheet is a major contribution to current sea level rise (SLR) with increased meltwater runoff responsible for half of this mass loss increase, yet the mechanisms and timescales involved in allowing surface meltwater to reach the ocean are poorly understood. The recent discovery of an extensive liquid water reservoir within the Greenland ice sheet firn further complicates the relationship of melt to SLR, since the aquifer system may be either buffering or accelerating SLR. However, even the most fundamental questions about the firn aquifer remain unanswered. A suite of remote sensing data sets coupled with in situ measurements and modeling are used to further constrain the spatial and temporal extent of the Greenland firn aquifer. NASA's Operation IceBridge Accumulation Radar from 2011-2014 are used to map the extent over a majority of the suspected areas. Repeated flight lines are used for multi-temporal analysis which generally indicates stable water depths, however, some changes in extent are detected. We have also tested a variety of ground based radar frequencies for detection of the top and bottom interfaces of the aquifer. Mapping of the retention of liquid water in the firn from space is demonstrated using an active microwave satellite scatterometer (ASCAT). This data set provides near daily observations of the aquifer recharge and freeze process at and below the surface over an integrated penetration depth. One full year of bore hole temperature measurements reveal progression of the aquifer recharge and refreezing from the surface. This provides insight into the thermodynamics and for comparison with satellite data to constrain the ASCAT observable depth of liquid water. JF - American Geophysical Union Fall Meeting AU - Forster, Rick R AU - Miller, J Z AU - Miege, Clement AU - Brucker, Ludovic AU - Koenig, Lora S AU - Solomon, D Kip AU - Schmerr, N C AU - Burgess, Evan W AU - Box, Jeb AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C21B EP - 0335 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054184?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Recent+results+on+the+Greenland+Aquifer+from+remote+sensing+and+in+situ+measurements&rft.au=Forster%2C+Rick+R%3BMiller%2C+J+Z%3BMiege%2C+Clement%3BBrucker%2C+Ludovic%3BKoenig%2C+Lora+S%3BSolomon%2C+D+Kip%3BSchmerr%2C+N+C%3BBurgess%2C+Evan+W%3BBox%2C+Jeb%3BAnonymous&rft.aulast=Forster&rft.aufirst=Rick&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 - Assessing mining impacts from dust and black carbon on Arctic snow in Svalbard, Norway AN - 1718054132; 2015-095669 AB - Coal mining in Svalbard has been ongoing since the early 1900's. In this study, spectral reflectance of undisturbed seasonal surface snow near an active coal mine closest to the largest settlement of Longyearbyen (78.2 degrees N) with refractory black carbon (rBC) up to 345 ppb are compared to a non-contaminated pristine site at Woodfjorden (79.5 degrees N) near the northern end of Svalbard with rBC approximately 1 ppb. Dissolved black carbon (DBC) measurements are also assessed as carbon passing through a 0.7 um filter and vary from 1 to 75 ppb. Reflectance spectra decreased dramatically across all wavelengths up to 1400 nm with increasing black carbon and the reflectance spectra did not converge at infrared wavelengths. At the most contaminated site with rBC of 345 ppb and DBC of 75 ppb, absolute reflectance was much lower than previously published results with values between 10 and 20% in blue wavelengths. This indicates the potential impact of BC on natural long-term contaminated snow spectra subject to melt and refreezing and the possibility to serve as a natural end member for global remote sensing studies. These results are also significant because there is increasing pressure being put on Arctic communities to increase mining exploration. Additionally, diminishing sea-ice resulting in increased shipping traffic will also contribute to BC impacts in the Arctic. JF - American Geophysical Union Fall Meeting AU - Khan, Alia Lauren AU - Dierssen, Heidi M AU - Schwarz, Joshua P AU - Ding, Y AU - Jaffe, R AU - Painter, Thomas H AU - McKnight, Diane M AU - Hermanson, Mark H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C13A EP - 0419 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/1718054132?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+mining+impacts+from+dust+and+black+carbon+on+Arctic+snow+in+Svalbard%2C+Norway&rft.au=Khan%2C+Alia+Lauren%3BDierssen%2C+Heidi+M%3BSchwarz%2C+Joshua+P%3BDing%2C+Y%3BJaffe%2C+R%3BPainter%2C+Thomas+H%3BMcKnight%2C+Diane+M%3BHermanson%2C+Mark+H%3BAnonymous&rft.aulast=Khan&rft.aufirst=Alia&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 - Isotopic evidence for complex microbial ecosystems in the phosphate-rich interval of the Miocene Monterey Formation AN - 1718054111; 2015-095609 AB - The middle Miocene Monterey Formation has long been debated as a crucial global sink for organic carbon that led to global cooling. We evaluate proxies for the microbial ecosystem to investigate organic carbon burial within the phosphate-rich interval of the Monterey Formation at Naples Beach, California by combining mineralogical evidence with delta 34S analyses of carbonate associated sulfate (CAS). All delta 34S are below Miocene seawater values ( approximately 22 ppm, VCDT) and range from +12.2 ppm to +18.5 ppm. delta 34SCAS10 (super 7) ) of observations involved. The resulting trend estimates are only dependent on length and smoothness properties obtained from numerical models, but are otherwise entirely data-driven. As a consequence, the solutions provide a valuable independent test of the forward models. Here, we present the annually-resolved spatial fields for i) dynamic ice loss, ii) SMB anomaly, iii) firn compaction and iv) (the time invariant) GIA, using a combination of GRACE, ICESat, ENVISat, CryoSat 2 and GPS vertical uplift rates, for 2003-2013. The elastic flexure of the crust is also determined simultaneously. We focus here primarily on the mass trends rather than solid earth effects. We present the spatial pattern of evolving dynamic ice loss in West Antarctica and the Antarctic Peninsula and contrast that with a significant positive SMB anomaly in East Antarctica since 2009 and other parts of the ice sheet. We also compare our SMB anomalies with those from the regional climate model, RACMO-2.3 to test its ability to capture the spatio-temporal structure of inter-annual variability in snowfall. JF - American Geophysical Union Fall Meeting AU - Bamber, J L AU - Martin, Alba AU - Schoen, N AU - Zammit-Mangion, A AU - Luthcke, Scott B AU - Petrie, E J AU - Helm, Veit AU - Remy, F AU - Wouters, Bert AU - King, Matt A AU - Rougier, J C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C21A EP - 0311 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/1718053990?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Antarctic+ice+sheet+mass+loss%2C+glacio-isostatic+adjustment+and+surface+processes+from+ENVISAT%2C+ICESat%2C+CryoSat-2%2C+GRACE+and+GPS&rft.au=Bamber%2C+J+L%3BMartin%2C+Alba%3BSchoen%2C+N%3BZammit-Mangion%2C+A%3BLuthcke%2C+Scott+B%3BPetrie%2C+E+J%3BHelm%2C+Veit%3BRemy%2C+F%3BWouters%2C+Bert%3BKing%2C+Matt+A%3BRougier%2C+J+C%3BAnonymous&rft.aulast=Bamber&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 - Bed topography of Store Glacier and Fjord, Greenland from high-resolution gravity data and multi-beam echo sounding AN - 1718053862; 2015-095702 AB - Store Glacier is a major west Greenland outlet tidewater glacier draining an area of 30,000 square km into Uummannaq Fjord, and flowing at a speed of 4.8 km per year at its terminus. The bed topography of the glacier is poorly known and the fjord bathymetry was partially surveyed for the first time in August 2012. In this study, we present a new approach for the inference of the glacier bed topography, ice thickness and sea floor bathymetry using high-resolution airborne gravity data combined with other data. In August 2012, we acquired a 250 m spacing grid of free-air gravity data at a speed of 50 knots with accuracy at sub-milligal level much higher accuracy than NASA Operation IceBridge (OIB) gravity campaign with approximate 5.2 km resolution at 290 knots flying speed. In August 2012 and 2013, we used multi-beam echo sounding to survey the sea floor bathymetry in front of the glacier, extending to the calving face of the glacier. Inland, we combined radar-derived ice thickness with ice motion vectors to reconstruct the bed topography at a high resolution. Using a 3D inversion of the gravity data, we reconstruct seamless bed topography across the ice front boundary that matches interior data and sea floor bathymetry, and provides information about sediment thickness beneath and in front of the glacier. Comparison of the results with prior maps reveals vast differences. IBCAO3 bathymetry suggests an ice front grounded at sea level while the measured ice front is grounded 550 m below sea level. The seamless topography obtained across the grounding line reveals the presence of a previously unknown sill, which explains why the glacier has been so stable in the last 50 years. The results have important impacts on the interpretation of the glacier stability, and sensitivity to thermal forcing from the ocean and surface melt. This work was conducted at UCI under a contract with the Gordon and Betty More Foundation and with NASA. JF - American Geophysical Union Fall Meeting AU - An, L AU - Rignot, E J AU - Muto, A AU - Morlighem, Mathieu AU - Kemp, C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C21B EP - 0317 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/1718053862?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Bed+topography+of+Store+Glacier+and+Fjord%2C+Greenland+from+high-resolution+gravity+data+and+multi-beam+echo+sounding&rft.au=An%2C+L%3BRignot%2C+E+J%3BMuto%2C+A%3BMorlighem%2C+Mathieu%3BKemp%2C+C%3BAnonymous&rft.aulast=An&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 - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - The 1500 m South Pole ice core; recovering a 40,000 year environmental record AN - 1718053814; 2015-095732 AB - The stable-isotope, aerosol and atmospheric gas records in ice cores provide exceptional archives of past climate. Supported by the U.S. National Science Foundation, a new 1500 m, approximately 40,000 year old ice core will be recovered from South Pole during the current 2014-2015 austral summer season (to approximately 700 m) and next 2015-2016 austral summer season ( approximately 700 m to 1500 m) using the new U.S. Intermediate Depth Drill. The combination of low temperature, relatively high accumulation rate, and low impurity concentrations at South Pole will yield a detailed record of atmospheric trace gases. The South Pole ice core will also provide a record of the climate history of a unique area of the East Antarctic plateau that is partly influenced by weather systems that cross the West Antarctic ice sheet. The South Pole ice core site is at a flank site where the ice flows at approximately 10 m/yr. The ice core recovered originated as snow at progressively greater distances from the coring site. New ground-penetrating radar collected over the drill site location shows no anthropogenic influence over the past approximately 50 years or upper 15 m. In this submission, we describe the climate and glaciologic setting of the South Pole, and the details of the ultimate coring site. JF - American Geophysical Union Fall Meeting AU - Neumann, Thomas AU - Casey, Kimberly AU - Fudge, T J AU - Steig, E J AU - Saltzman, Eric S AU - Aydin, M AU - Twickler, Mark AU - Souney, Joseph M, Jr AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C31C EP - 0336 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/1718053814?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+1500+m+South+Pole+ice+core%3B+recovering+a+40%2C000+year+environmental+record&rft.au=Neumann%2C+Thomas%3BCasey%2C+Kimberly%3BFudge%2C+T+J%3BSteig%2C+E+J%3BSaltzman%2C+Eric+S%3BAydin%2C+M%3BTwickler%2C+Mark%3BSouney%2C+Joseph+M%2C+Jr%3BAnonymous&rft.aulast=Neumann&rft.aufirst=Thomas&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 - Mapping extent changes of the Barnes ice cap since the Little Ice Age AN - 1718053758; 2015-095721 AB - Over the past decade glaciers and ice caps of the Canadian Arctic Archipelago have experienced large mass losses and contributed significantly to sea level rise. The Barnes Ice Cap, a remnant of Laurentide Ice Sheet, is of particular importance as it has been found to be highly sensitive to changes in summer temperature. Here we determine changes in the extent of the Barnes Ice Cap to understand its evolution from the Little Ice Age to present. Trimlines of the Barnes Ice Cap are extracted from ASTER imagery providing a maximal extent of the ice cap during the Little Ice Age. Extent changes over the past half-century are mapped and quantified with the aid of Landsat imagery and a digitized map sheet derived from 1961 photogrammetry. From these data we identify an accelerating rate of recession, with higher rates of retreat on the western side of the ice cap. Since observations began in the early 1950s there has been little change annual precipitation amounts but a warming trend in summer air temperatures. The observed accelerating rate of retreat is therefore attributed to regional changes in summer temperature. JF - American Geophysical Union Fall Meeting AU - Li, Jiay AU - Gardner, Alex S AU - Gibb, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C31B EP - 0284 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/1718053758?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Mapping+extent+changes+of+the+Barnes+ice+cap+since+the+Little+Ice+Age&rft.au=Li%2C+Jiay%3BGardner%2C+Alex+S%3BGibb%2C+M%3BAnonymous&rft.aulast=Li&rft.aufirst=Jiay&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 - Subsurface controls on habitability of hydrothermal waters AN - 1718053413; 2015-092508 AB - Liquid water alone does not make an environment habitable. Environmental settings dominated by water-rock reactions such as in hydrothermal vents and springs are natural targets for astrobiological investigation of waterworlds because the rich geochemical diversity at these locales provides abundant energy in solvent to support microbial life. Hydrogen oxidizers are of particular interest because H2-based metabolisms are widespread and deeply rooted throughout the phylogenetic tree of life, implying they may have emerged extremely early in the evolution, and possibly even the origin, of life on Earth and potentially any other rocky bodies bearing liquid water. Dihydrogen (H2) can be lithogenically produced by the hydrolytic oxidation of the ferrous iron component in Fe-bearing minerals as well as by radiolytic cleavage of water by alpha , beta , or gamma radiation produced during the decay of radioactive isotopes. Lithogenic H2 production mechanisms operate across a range of rock types, but the concentration of dissolved H2 available to life is controlled by a number of subsurface factors such as surface geometry, water to rock ratio, production rate, and fluid flux. These factors are often controlled by the larger geologic and structural context of a particular site. We present results of an ongoing project that surveys H2 concentrations from terrestrial hydrothermal waters in diverse chemical and physical settings. Aqueous H2 concentrations and potential subsurface controls are presented for sites across the western U.S. including Yellowstone National Park, Lassen Volcanic National Park, and Iceland. In coordination with field data, we also investigate the habitability of various sites numerically by coupling a geochemical model of water-rock interaction with that of single-cell methanogenesis and compute a habitability index for the given environment. In particular, we investigate the control that temperature, rock composition, water composition, and water to rock ratio (dilution) has on biological potential. JF - American Geophysical Union Fall Meeting AU - Fristad, Kirsten E AU - Som, Sanjoy M AU - Hoehler, Tori M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B13A EP - 0157 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/1718053413?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Subsurface+controls+on+habitability+of+hydrothermal+waters&rft.au=Fristad%2C+Kirsten+E%3BSom%2C+Sanjoy+M%3BHoehler%2C+Tori+M%3BAnonymous&rft.aulast=Fristad&rft.aufirst=Kirsten&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 - Pisolithus tinctorius, fungal extremophile and modern analog to an early Earth environment; an unlikely harbor for deeply diverging and novel chemoautrophic microbes AN - 1718051741; 2015-092576 AB - Endosymbioses have given rise to some of the most important innovations in Earth's history. Indeed, ecological facilitation has been pivotal to the creation of higher order complexity, and in driving evolutionary transitions at every level of organization from cellular organelles to multicellularity. In this study we address a newly discovered endosymbiosis between prokaryotes and a eukaryote growing with no apparent external energy source in soils associated with acid-sulfate hydrothermal springs. Hydrothermal sites are relevant to origin of life because they provide a chemical and energetic environment that may have provided energy for pre-biotic synthesis in the absence of photosynthesis through chemoautotrophy. Pisolithus (genus, picture 1 below) is a terrestrial fungal extremophile that can grow in thermally altered soils of acid-thermal hot springs at extreme low pH and elevated temperature, thriving in conditions that are beyond the threshold of survivability for most other organisms. Fruiting bodies of this fungus accumulate elemental sulfur into the spore producing tissues (gleba) of the fruiting body. The gleba is encased in a thick peridium, or shell. Further, Pisolithus is capable of enzymatic conversion of elemental S to sulfate. The fruiting bodies are rich in hydrocarbons, contain water through much of their development and are also likely to contain CO2 from fungal cellular respiration. Further, our data indicate the presence of anaerobic zones within. Thus, the internal environment of Pisolithus contains many conditions relevant to early Earth environments in which life is thought to have originated. We used 16S rDNA sequences to test the hypothesis that Pisolithus individuals contain novel and/or ancient microbial lineages. Our data reveal lineages comprised of novel relatives of known aerobic and anaerobic chemoautrophic Bacteria (85-90% BLAST search matches), several deeply divergent and novel Bacterial lineages, and a newly discovered lineage that branches at the base of the Archaeal clade indicating the presence of, at the very least, a new Phylum/Division within this group. Thus, the data provide a model for furthering our understanding of the diversification of life, in a novel modern analog to an early Earth environment. JF - American Geophysical Union Fall Meeting AU - Cullings, K C AU - Lauzon, Carol AU - Marinkovich, Niki AU - Truong, Tina AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B21A EP - 0004 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718051741?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Pisolithus+tinctorius%2C+fungal+extremophile+and+modern+analog+to+an+early+Earth+environment%3B+an+unlikely+harbor+for+deeply+diverging+and+novel+chemoautrophic+microbes&rft.au=Cullings%2C+K+C%3BLauzon%2C+Carol%3BMarinkovich%2C+Niki%3BTruong%2C+Tina%3BAnonymous&rft.aulast=Cullings&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 - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Using brittle fragmentation theory to represent aerosol mineral composition AN - 1718051436; 2015-092422 AB - Improved estimates of dust aerosol effects upon climate require the characterization of dust mineral and chemical composition. Regional variations in soil mineral composition lead to variations in dust aerosol composition. Yet, deriving aerosol mineral content also requires knowledge of the parent soil size distribution along with the fragmentation of soil particles and aggregates during the emission process. These processes modify the size distribution and mineral abundance of the emitted aerosols compared to the parent soil. An additional challenge for modeling is that global atlases of soil texture and composition are based on wet sieving, a technique that breaks the aggregates, particularly phyllosilicates, that are encountered in natural soils, drastically altering the original size distribution of the soil that is subject to wind erosion. We propose both a semi-empirical and theoretical method to constrain the size-resolved mineral composition of emitted dust aerosols based on global atlases of soil texture and composition. Our semi-empirical method re-aggregates clay phyllosilicate minerals into larger soil particle sizes and constrains the size distribution of each emitted mineral based on observed mineral distributions at the source. Our theoretical method extends Kok's brittle fragmentation theory to individual minerals. To this end we reconstruct the undisturbed size distribution for each mineral as a function of soil texture and soil type and calculate the emitted size distribution applying brittle fragmentation and assuming homogeneous fragmentation properties among the mineral aggregates. These approaches were tested within the NASA GISS Earth System ModelE. We discuss the improvements achieved and suggest future developments. JF - American Geophysical Union Fall Meeting AU - Garcia-Pando, Carlos Perez AU - Miller, Ron L AU - Perlwitz, Jan P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A44C 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/1718051436?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+brittle+fragmentation+theory+to+represent+aerosol+mineral+composition&rft.au=Garcia-Pando%2C+Carlos+Perez%3BMiller%2C+Ron+L%3BPerlwitz%2C+Jan+P%3BAnonymous&rft.aulast=Garcia-Pando&rft.aufirst=Carlos&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 - The microbial mats of Pavilion Lake microbialites; examining the relationship between photosynthesis and carbonate precipitation AN - 1718051360; 2015-092645 AB - Pavilion Lake in British Columbia, Canada is an ultra-oligotrophic lake that has abundant microbialite growth. Recent research has shown that photoautotrophic microbial communities are important to modern microbialite development in Pavilion Lake. However, questions remain as to the relationship between changing light levels within the lake, variation in microbialite macro-structure, microbial consortia, and the preservation of associated biosignatures within the microbialite fabrics. The 2014 Pavilion Lake Research Project (PLRP) field program was focused on data gathering to understand these complex relationships by determining if a) light is the immediate limit to photosynthetic activity and, if so, if light is distributed around microbialites in ways that are consistent with emergent microbialite structure; and b) if at more local scales, the filamentous pink and green cyanobacterial nodular colonies identified in previous PLRP studies are centers of photosynthetic activity that create pH conditions suitable for carbonate precipitation. A diver-deployed pulse-amplitude modulated (PAM) fluorometer was used to collect synoptic in situ measurements of fluorescence yield and irradiance and across microbialites, focusing on comparing flat and vertical structural elements at a range of sites and depths. As well, we collected time series measurements of photosynthetic activity and irradiance at a set depth of 18 m across three different regions in Pavilion Lake. Our initial findings suggest that all microbialite surfaces are primarily light-limited regardless of depth or location within the lake. Shore based PAM fluorometry and microelectrode profiling of diver-collected samples suggest that pink and green nodules have different photosynthetic properties and pH profiles, and that nodular growth is likely to be the primary route of calcification due to the gelatinous covering the nodule creates. On-going tests for molecular signatures and isotopic shifts will allow for further examination of surface microvariation and the associated influence on microbialite development. JF - American Geophysical Union Fall Meeting AU - Lim, Darlene S S AU - Hawes, I AU - Mackey, T J AU - Brady, A L AU - Biddle, J AU - Andersen, D T AU - Belan, M AU - Slater, G AU - Abercromby, Andrew F AU - Squyres, S W AU - Delaney, M AU - Haberle, C W AU - Cardman, Zena AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B23A EP - 0183 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/1718051360?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+microbial+mats+of+Pavilion+Lake+microbialites%3B+examining+the+relationship+between+photosynthesis+and+carbonate+precipitation&rft.au=Lim%2C+Darlene+S+S%3BHawes%2C+I%3BMackey%2C+T+J%3BBrady%2C+A+L%3BBiddle%2C+J%3BAndersen%2C+D+T%3BBelan%2C+M%3BSlater%2C+G%3BAbercromby%2C+Andrew+F%3BSquyres%2C+S+W%3BDelaney%2C+M%3BHaberle%2C+C+W%3BCardman%2C+Zena%3BAnonymous&rft.aulast=Lim&rft.aufirst=Darlene+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 - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Xenon fractionation, hydrogen escape, and the oxidation of the Earth AN - 1718050851; 2015-092890 AB - Xenon in Earth's atmosphere is severely mass fractionated and depleted compared to any plausible solar system source material, yet Kr is unfractionated. These observations seem to imply that Xe has escaped from Earth. Vigorous hydrodynamic hydrogen escape can produce mass fractionation in heavy gases. The required hydrogen flux is very high but within the range permitted by solar EUV heating when Earth was 100 Myrs old or younger. However this model cannot explain why Xe escapes but Kr does not. Recently, what appears to be ancient atmospheric xenon has been recovered from several very ancient (3-3.5 Ga) terrestrial hydrothermal barites and cherts (Pujol 2011, 2013). What is eye-catching about this ancient Xe is that it is less fractionated that Xe in modern air. In other words, it appears that a process was active on Earth some 3 to 3.5 billion years ago that caused xenon to fractionate. By this time the Sun was no longer the EUV source that it used to be. If xenon was being fractionated by escape--currently the only viable hypothesis--it had to be in Earth's Archean atmosphere and under rather modest levels of EUV forcing. It should be possible for Xe, but not Kr, to escape from Earth as an ion. In a hydrodynamically escaping hydrogen wind the hydrogen is partially ionized. The key concepts are that ions are much more strongly coupled to the escaping flow than are neutrals (so that a relatively modest flow of H and H+ to space could carry Xe+ along with it, the flux can be small enough to be consistent with diffusion-limited flux), and that Xe alone among the noble gases is more easily ionized than hydrogen. This sort of escape is possible along the polar field lines, although a weak or absent magnetic field would likely work as well. The extended history of hydrogen escape implicit in Xe escape in the Archean is consistent with other suggestions that hydrogen escape in the Archean was considerable. Hydrogen escape plausibly played the key role in creating oxidizing conditions at the surface of the Earth and setting the stage for the creation of an O2 atmosphere (Urey 1951, Catling et al 2001, Zahnle et al 2013). JF - American Geophysical Union Fall Meeting AU - Zahnle, K J AU - Catling, D C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP53A EP - 1200 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/1718050851?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Xenon+fractionation%2C+hydrogen+escape%2C+and+the+oxidation+of+the+Earth&rft.au=Zahnle%2C+K+J%3BCatling%2C+D+C%3BAnonymous&rft.aulast=Zahnle&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 - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - A high-resolution sulphur isotope record of Neoarchean atmospheric chemistry; deciphering the driver of atmospheric bi-stability in the prelude to the GOE. AN - 1718050760; 2015-092873 AB - Quantitative estimates of the composition of the Late Archean atmosphere are integral to deciphering the drivers of planetary oxygenation in the early Paleoproterozoic. However, the majority of geochemical proxies from marine sediments only inform on planetary redox via inference, making direct constraints on the ancient atmosphere difficult to place. Fortunately, the quadruple S-isotope (QSI) record (delta 34S, Delta 33S, and Delta 36S) is implicitly tied to the composition of the ancient atmosphere. We have generated coupled QSI and delta 13COrg records from two cores through the Transvaal basin in South Africa (GKF01 and BH1-Sacha) and from three time-equivalent cores through the Hammersley basin in Western Australia. These records reveal similar, apparently synchronous, co-variation between deviations from "typical" Neoarchean Delta 36S/Delta 33S values and negative delta 13COrg values (C-S anomalies). We have interpreted these trends to reflect increased incorporation of 13C-depleted substrates (methane) into sedimentary matter following apparently episodically enhanced methanogenesis in the prelude to the GOE. These records suggest the terminal Neoarchean atmosphere operated in a bi-stable fashion, oscillating between a clear skies and organic-rich hazy state (Zerkle et al., 2010; Izon et al., in review). We speculate that these C-S anomalies reflect enhanced nutrient availability, facilitating the proliferation of an oxygenic photosynthetic/methanogenic biosphere, concomitantly amplifying biogenic CH4 and O2 fluxes and altering atmospheric chemistry. Here we present a new S- and C-isotope data set, derived at unprecedented resolution, encompassing the youngest C-S anomaly identified in core GKF01. These analyses will be combined with Fe-speciation and trace-metal data to elucidate whether atmospheric methane levels were regulated by climatically driven changes in nutrient fluxes to the marine biosphere. Taken together, our research serves as an initial foray to determine how, and why, the early Earth redox balance shifted, initiating oxygenation and ultimately spawning a habitable planet capable of supporting macroscopic life. JF - American Geophysical Union Fall Meeting AU - Izon, G J AU - Zerkle, A AU - Newton, R J AU - Poulton, S W AU - Eigenbrode, Jennifer L AU - Farquhar, J AU - Claire, M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP53A EP - 1183 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718050760?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+high-resolution+sulphur+isotope+record+of+Neoarchean+atmospheric+chemistry%3B+deciphering+the+driver+of+atmospheric+bi-stability+in+the+prelude+to+the+GOE.&rft.au=Izon%2C+G+J%3BZerkle%2C+A%3BNewton%2C+R+J%3BPoulton%2C+S+W%3BEigenbrode%2C+Jennifer+L%3BFarquhar%2C+J%3BClaire%2C+M%3BAnonymous&rft.aulast=Izon&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 - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Identifying and interpreting the imprint of the Little Ice Age over the Balkan landscape; a combined palynological and geochemical approach AN - 1718050610; 2015-092748 AB - We examine a multi-centennial Balkan record of vegetation and landscape during the Little Ice Age (LIA) climatic transition that lasted from c. 15th to the 19th century AD. Biological proxies (pollen, spores, and charcoal), geochemical analysis (X-ray Fluorescence (XRF)), and a robust chronology based on AMS 14C dating are used to reconstruct the vegetation response and human-environmental interactions during the LIA. A sediment core extracted from a sinkhole lake located in western Serbia (44 degrees 30'N-19 degrees 30'E; elevation 250 m a.s.l.) was sampled at 10-cm intervals for investigating biological proxies. Palynological data include temperate indigenous trees (e.g. Quercus, Betula), herbaceous taxa (e.g. Poaceae, Chenopodiaceae), and key anthropogenic indicators (e.g. Juglans, cereals) and demonstrate wet and cool conditions as well as seasonal variations during cal. 16th to 19th century AD. The XRF data obtained from the core at 1-cm intervals show changes in the clastic input and surface erosion around the lake probably owing to seasonal variations during the LIA. Moreover, pollen and charcoal data together reveal the changing nature of human interference across the LIA from intense deforestation to reforestation and sustained cultivation with climatic and seasonal variations. Correlating palaeoecological and geochemical data for this region allows us to interpret the long-term dynamics of landscape and humans across one of the important climatic intervals in Europe. The Balkans, as one of Europe's "Biodiversity Hotspots" and a rapidly changing region, provides insights into possible biotic responses to future global climatic change. JF - American Geophysical Union Fall Meeting AU - Kulkarni, C AU - Peteet, D M AU - Boger, R A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP11A EP - 1316 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/1718050610?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+and+interpreting+the+imprint+of+the+Little+Ice+Age+over+the+Balkan+landscape%3B+a+combined+palynological+and+geochemical+approach&rft.au=Kulkarni%2C+C%3BPeteet%2C+D+M%3BBoger%2C+R+A%3BAnonymous&rft.aulast=Kulkarni&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 - 2015-10-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Influence of chemically enhanced diffusion on cap dolostones? AN - 1718049387; 2015-092871 AB - Cap dolostones, a globally distributed layer of carbonate rock that sits directly on terminal glacial deposits of the severe Cryogenian ice-age, contain important records of the conditions during the early stage of climatic recovery. Negative carbon isotope signals preserved in the cap are central to discussions of the mechanisms, drivers and time-scale of this interval of extreme climate change. These signals have been attributed to the rapid rise in temperature and acidic ocean conditions predicted to result from huge amounts of CO2 in the atmosphere, which bumped the Earth out of the Snowball state. Questions remain however, because detailed investigations of cap dolostone isotopic variability within individual sedimentary basins show systematic variations that are difficult to explain by temperature effects alone. Furthermore, other influences on cap isotopes have been hypothesized including, the release of massive amounts of methane trapped by the ice and upwelling of deep ocean water with negative signals. This contribution will explore the potential impact of chemically enhanced diffusion (CED) on the carbon isotopic compositions of cap dolostones using a box model. CED is a process by which CO2 gas is transferred to solution via reaction with hydroxide anions. In the modern ocean, rates of CED are thought to be insignificant and CO2 gas transfer is accomplished primarily by diffusion and dissolution, with minimal isotopic fraction. However, in various highly productive lakes, the strong negative isotope fraction of -27 ppm associated CED impacts the isotopic composition of dissolved inorganic carbon. Post-glacial oceans may have been chemically similar to highly productive lakes and initial modeling results indicate that CED could have influenced the carbon isotopic composition of seawater and thus the cap dolostone. Implications for post-glacial oceanic conditions will be discussed. JF - American Geophysical Union Fall Meeting AU - Bristow, Thomas F AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract PP53A EP - 1181 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/1718049387?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Influence+of+chemically+enhanced+diffusion+on+cap+dolostones%3F&rft.au=Bristow%2C+Thomas+F%3BAnonymous&rft.aulast=Bristow&rft.aufirst=Thomas&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 - The role of meteorology and surface condition to multi-decadal variations of dust emission in Sahara and Sahel AN - 1707521930; 2015-084169 AB - North Africa is the world's largest dust source region influencing regional and global climate, human health, and even the local economy. However North Africa as a dust source is not uniform but it consists of the arid region (Sahara) and the semi-arid region (Sahel) with emission rates depending on meteorological and surface conditions. Several recent studies have shown that dust from North Africa seems to have a decreasing trend in the past three decades. The goal of this study is to better understand the controlling factors that determine the change of dust in North Africa using observational data and model simulations. First we analyze surface bareness conditions determined from a long-term satellite observed Normalized Difference Vegetation Index for 1980-2008. Then we examine the key meteorological variables of precipitation and surface winds. Modeling experiments were conducted using the NASA Goddard Chemistry Aerosol Radiation and Transport (GOCART) model, which has been recently updated with a dynamic dust source function. Using the method we separate the dust originating from the Sahel from that of the Sahara desert. We find that the surface wind speed is the most dominant factor affecting Sahelian dust emission while vegetation has a modulating effect. We will show regional differences in meteorological variables, surface conditions, dust emission, and dust distribution and address the relationships among meteorology, surface conditions, and dust emission/loading in the past three decades (1980-2008). JF - American Geophysical Union Fall Meeting AU - Kim, Dongchul AU - Chin, Mian AU - Diehl, Thomas L AU - Bian, Huisheng AU - Brown, Molly E AU - Remer, L A AU - Stockwell, William R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A41E EP - 3082 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/1707521930?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+role+of+meteorology+and+surface+condition+to+multi-decadal+variations+of+dust+emission+in+Sahara+and+Sahel&rft.au=Kim%2C+Dongchul%3BChin%2C+Mian%3BDiehl%2C+Thomas+L%3BBian%2C+Huisheng%3BBrown%2C+Molly+E%3BRemer%2C+L+A%3BStockwell%2C+William+R%3BAnonymous&rft.aulast=Kim&rft.aufirst=Dongchul&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Emissions from NaturalGas operations in the Marcellus Shale Formation; in situ and and remote sensing AN - 1707521476; 2015-084129 AB - Substantial increases in natural gas production in the Marcellus Shale formation have led to measurable increases in select trace gas concentrations in the Eastern US. We present surface, aircraft, and satellite observations of trace gases to help quantify those emissions and their impacts on air quality in the Mid Atlantic States. Observations are being compared to models using data assimilation to evaluate emissions estimates. These efforts represent work done under NASA's Air Quality Applied Sciences Team, AQAST and initial steps of Flux of Atmospheric Greenhouse Gases, Maryland FLAGG-MD. JF - American Geophysical Union Fall Meeting AU - Dickerson, Russ R AU - Ren, Xinrong AU - Thompson, Anne M AU - Salawitch, R J AU - Shepson, P B AU - Burrows, J P AU - Sahu, S AU - Kollonige, D E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A11L EP - 04 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/1707521476?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Emissions+from+NaturalGas+operations+in+the+Marcellus+Shale+Formation%3B+in+situ+and+and+remote+sensing&rft.au=Dickerson%2C+Russ+R%3BRen%2C+Xinrong%3BThompson%2C+Anne+M%3BSalawitch%2C+R+J%3BShepson%2C+P+B%3BBurrows%2C+J+P%3BSahu%2C+S%3BKollonige%2C+D+E%3BAnonymous&rft.aulast=Dickerson&rft.aufirst=Russ&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - The persistence of volcanic ash in the tropical stratosphere after the Kelud eruption AN - 1707520503; 2015-084163 AB - An increase of volcanic activity over the past decade is thought to have contributed significantly to the global warming "hiatus". Thus, it is important to improve our understanding of the microphysical and optical properties of even small volcanic plumes as well as their associated climate impacts. On February 13th, 2014, the Mt Kelud volcano, located near 4 degrees S on the island of Java (Indonesia), injected volcanic gases and ash into the tropical stratosphere. An overpass of the CALIPSO lidar during the active phase of the eruption showed volcanic materials reaching 26 km with the main volcanic cloud near 18-19 km. This is the highest altitude volcanic injection since Mt Pinatubo in 1991. CALIPSO has tracked the dispersion of the Kelud plume throughout the tropical lower stratosphere ( approximately 20N-20S) since then. Depolarization lidar measurements (0.3-0.4) indicate that the plume was likely composed of irregularly shaped ash particles during the first few days after the eruption, and that sulfate aerosol (spherical droplets) formed thereafter, gradually lowering the mean depolarization to 0.1-0.2. In May, 2014, we mounted a 2-week campaign to Darwin (Australia) to measure several profiles of backscatter in red and blue channels, and one profile of aerosol size distribution using two optical particle counters, one with an inlet heated to 200 degrees C. The purpose was to characterize particle sizes, optical properties, and sulfate fraction from a relatively fresh volcanic plume in the low stratosphere. Preliminary results from the campaign suggest the persistence of ash particles at the bottom of the Kelud plume 3 months after the eruption. This is significant because the climate impact of ash is neglected in most climate models. JF - American Geophysical Union Fall Meeting AU - Vernier, Jean-Paul AU - Fairlie, T D AU - Deshler, T AU - Knepp, Travis N AU - Natarajan, Murali AU - Foster, K AU - Trepte, Charles R AU - Thomason, L W AU - Bedka, Kristopher M AU - Wienhold, Frank AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A31B EP - 3032 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/1707520503?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+persistence+of+volcanic+ash+in+the+tropical+stratosphere+after+the+Kelud+eruption&rft.au=Vernier%2C+Jean-Paul%3BFairlie%2C+T+D%3BDeshler%2C+T%3BKnepp%2C+Travis+N%3BNatarajan%2C+Murali%3BFoster%2C+K%3BTrepte%2C+Charles+R%3BThomason%2C+L+W%3BBedka%2C+Kristopher+M%3BWienhold%2C+Frank%3BAnonymous&rft.aulast=Vernier&rft.aufirst=Jean-Paul&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Top-down estimates of SO (sub 2) degassing emissions from the turrialba volcano using in situ measurements from unmanned aerial systems and the WRF-stilt model AN - 1707520432; 2015-084165 AB - In recent years, there has been a growing interest in the continuous volcanic degassing emissions as an important natural source of sulfur-rich gases and aerosols. To investigate the impact of volcanic degassing on atmospheric chemistry and climate forcing, chemical transport models rely on emission inventories compiled from various sources. For example, the emission database from the Aerosol Comparisons between Observations and Models (AEROCOM) project derives eruptive SO2 emissions from past literature, Volcanic Explosivity Index (VEI), and limited observations from satellite and in situ instruments. Additionally, for all volcanoes with historic eruptions, AEROCOM simply assigns a constant SO2 degassing rate of 6.2X10-4 kt/day. This rudimentary estimate can lead to large uncertainties in model simulations of the volcanic SO2 lifecycle and its impact on the atmospheric composition. In this study, we propose to apply inverse modeling techniques to estimate top-down SO2 emission rates from the Turrialba Volcano (0.025 degrees N, 83.767 degrees W) using in situ SO2 measurements from unmanned aerial systems (UASs) during March 2013. We predict SO2 mixing ratios along the UASs' flight paths based on the AEROCOM a priori SO2 emission dataset and the atmospheric trajectories and surface influence simulated by the WRF-STILT model. We incorporate a high-resolution ( approximately 30 m) terrain data into the model in order to account for the effects of the complex orography on the wind conditions near the volcano. The predicted SO2 mixing ratios are compared with measurements in a statistical procedure to minimize the model-data difference thereby yielding improved posterior estimates of volcanic SO2 degassing emission rates. A detailed uncertainty analysis will be conducted during this study taking into account all sources of error in the inverse modeling approach, such as the SO2 measurements, meteorological inputs, model configurations (e.g., spatial resolution, model physics parameterizations), and back trajectory calculations. JF - American Geophysical Union Fall Meeting AU - Xi, Xin AU - Johnson, Matthew S AU - Fladeland, Matthew M AU - Pieri, David C AU - Diaz, Jorge Andres AU - Jeong, S AU - Bland, Geoff AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A33G EP - 3284 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/1707520432?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Top-down+estimates+of+SO+%28sub+2%29+degassing+emissions+from+the+turrialba+volcano+using+in+situ+measurements+from+unmanned+aerial+systems+and+the+WRF-stilt+model&rft.au=Xi%2C+Xin%3BJohnson%2C+Matthew+S%3BFladeland%2C+Matthew+M%3BPieri%2C+David+C%3BDiaz%2C+Jorge+Andres%3BJeong%2C+S%3BBland%2C+Geoff%3BAnonymous&rft.aulast=Xi&rft.aufirst=Xin&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Dust transport from glacierized rivers of southern Alaska to the Gulf of Alaska; interannual variability in magnitude and sources AN - 1707520342; 2015-084171 AB - Dust from high latitudes is underappreciated and little studied. We recently identified new sites of dust formation, and a new dust generation mechanism, from the southern AK coastline, in Crusius et al, 2011. Dust is generated each autumn from glacierized river valleys as river levels and discharge decrease following summer peak glacier melt. The most prominent such river is the Copper River, the single largest freshwater source to the Gulf of Alaska. Each autumn the exposed river floodplains contain abundant, fine glacial flour and represent a large dust source region, prior to significant snowfall. Strong katabatic winds channeled down mountain river valleys generate dust from the fine glacial flour, which is transported as much as several hundred kilometers into the ocean. This dust is an important source of Fe to the Gulf of Alaska, where phytoplankton growth is limited by available Fe (a micronutrient). Glaciers are rapidly losing mass in this region, so there is an increasing supply of fine glacial flour during the summer melt season, and possibly increased deposition of fine glacial flour in the dust source regions. We initiated continuous, year-round time-series measurements of dust concentration, and its geochemical composition, in August of 2011 on Middleton Island, AK, which lies in the path of the dust plume extending from the Copper River valley. Dust is clearly generated from other glacierized river valleys along the southern coast of AK, as well. We will discuss results from our continuous record spanning three dust seasons, which prominently shows these events each autumn, and displays substantial interannual variability. Dust appears to remain in the boundary layer, but is transported hundreds of kilometers into the ocean, into Fe-limited waters. It is also possible that some of this dust is redeposited on snow or glacier surfaces, enhancing melting. This dust source is not accounted for in typical global dust models. JF - American Geophysical Union Fall Meeting AU - Crusius, J AU - Schroth, Andrew W AU - Campbell, R W AU - Resing, Joseph AU - Gasso, Santiago AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A41E EP - 3086 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/1707520342?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Dust+transport+from+glacierized+rivers+of+southern+Alaska+to+the+Gulf+of+Alaska%3B+interannual+variability+in+magnitude+and+sources&rft.au=Crusius%2C+J%3BSchroth%2C+Andrew+W%3BCampbell%2C+R+W%3BResing%2C+Joseph%3BGasso%2C+Santiago%3BAnonymous&rft.aulast=Crusius&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 - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Volcanic SO (sub 2) ; the disparity between satellite observations and the AeroCOM database AN - 1707520304; 2015-084161 AB - Volcanoes are the largest natural source of SO2 in the world and volcanic SO2 is an important aerosol precursor in many atmospheric composition and climate simulations. The current AeroCOM database for volcanic SO2 has been compiled from both publications and assumptions about volcanic degassing behavior and includes over 36,000 named and unnamed volcanic sources. However, satellite observations compiled from the Ozone Monitoring Instrument (OMI), aboard NASA's Aura satellite, the Ozone Mapping Profiler Suite (OMPS), aboard NOAA/NASA's Suomi NPP satellite, and other satellite based SO2 observing instruments do not support many of the estimates made for volcanic SO2 in the current database. For example, the current database significantly overestimates SO2 from Barren Island in December 2008 and significantly underestimates the SO2 erupted from Ambrym during the same month. Additionally, all of the volcanoes in the database are assumed to be degassing continually to some extent, an assumption that is not supported by satellite observations. We present three CTM GEOS-Chem simulations, run from 2007 to 2008, in order to highlight these issues. The first simulation includes the existing AeroCOM SO2 database and a few select eruptions from this simulation will be compared in detail to satellite observations made over the same period of time. The second simulation will be run with all of the volcanic SO2 removed in order to examine the sensitivity of the global SO2 budget to volcanic contributions. Finally, the third simulation will be run with updated values of volcanic SO2 at specific sources that are based on satellite observations during the corresponding time period. The existing AeroCOM volcanic SO2 database is robust but, in many cases, is also based on outdated degassing estimates and assumptions that do not agree with our increasing body of satellite observations. Improving the database has the potential to improve model chemistry for a wide community of users. JF - American Geophysical Union Fall Meeting AU - Telling, J W AU - Carn, S A AU - Huang, Yaoxian AU - Krotkov, Nickolay A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A31B EP - 3030 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/1707520304?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Volcanic+SO+%28sub+2%29+%3B+the+disparity+between+satellite+observations+and+the+AeroCOM+database&rft.au=Telling%2C+J+W%3BCarn%2C+S+A%3BHuang%2C+Yaoxian%3BKrotkov%2C+Nickolay+A%3BAnonymous&rft.aulast=Telling&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 - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Anthropogenic and volcanic contributions to the decadal variations of aerosols in the upper troposphere and lower stratosphere AN - 1707520215; 2015-084160 AB - We investigate the anthropogenic and volcanic contributions to sulfate aerosol in the stratosphere through modeling and analysis of satellite data. We use a global model GOCART to simulate SO2 and sulfate aerosol in the period of 2000 to 2010, during which a numerous volcanic eruptions occurred although nothing like the magnitudes of El Chichon or Pinatubo. We compare the model results with the column SO2 data from OMI and stratospheric SO2 data from MLS instrument on Aura satellite and the aerosol vertical profiles from the SCIAMACHY instrument on Envisat and the CALIOP instrument on CALIPSO satellites. Finally, we will assess the relative contributions of volcanic aerosols vs. anthropogenic aerosols to the observed decadal stratospheric aerosol trends. JF - American Geophysical Union Fall Meeting AU - Chin, Mian AU - Diehl, Thomas L AU - Bian, Huisheng AU - Aquila, Valentina AU - Colarco, Peter R AU - Burrows, J P AU - Krotkov, Nickolay A AU - Vernier, Jean-Paul AU - Lu, Z AU - Streets, D G AU - Pumphrey, H C AU - Read, William G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A31B EP - 3029 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/1707520215?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Anthropogenic+and+volcanic+contributions+to+the+decadal+variations+of+aerosols+in+the+upper+troposphere+and+lower+stratosphere&rft.au=Chin%2C+Mian%3BDiehl%2C+Thomas+L%3BBian%2C+Huisheng%3BAquila%2C+Valentina%3BColarco%2C+Peter+R%3BBurrows%2C+J+P%3BKrotkov%2C+Nickolay+A%3BVernier%2C+Jean-Paul%3BLu%2C+Z%3BStreets%2C+D+G%3BPumphrey%2C+H+C%3BRead%2C+William+G%3BAnonymous&rft.aulast=Chin&rft.aufirst=Mian&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Profiling the SO (sub 2) plume from Volcan Turrialba; ticosonde balloon measurements compared with OMI and OMPS retrievals AN - 1707520213; 2015-084166 AB - The summit of Volcan Turrialba (elev. 3340 m) lies less than 50 km upstream in the prevailing easterlies from the Ticosonde balloon launch site at San Jose, Costa Rica, where ECC ozone sondes have been launched regularly since 2005. In 2006 we began to see telltale notches in the ozone profiles in the altitude range between 2 and 6 km. Given the proximity of Turrialba, it seemed likely that SO2 in the volcano's plume was interfering in the chemical reaction in the ECC ozone sonde used to detect ozone. In early 2010, fumarolic activity in the Turrialba crater increased strongly, and the profile notches in our soundings increased in frequency as well, consistent with this hypothesis. In February 2012 we tested a dual ECC sonde system, where an additional sonde is flown on the same payload using a selective SO2 filter. The difference of the measurements in the dual sonde is a direct measure of the amount of SO2 encountered. This first dual sonde passed through the plume, and the data indicated a tropospheric SO2 column of 1.4 DU, comparing favorably with a total column of 1.7 DU in the OMI 3-km linear fit (LF) product at the sonde profile location and at nearly the same time. We are now launching dual sondes on a regular basis with 18 launches in the first 12 months through July 2014; 11 of these have detectable SO2 signals. These soundings have great potential for validation of the Aura OMI and the Suomi-NPP OMPS retrievals of SO2. Here we present the sonde measurements and compare them with two satellite datasets: the Aura OMI Linear Fit (LF) product and the Suomi-NPP OMPS Principal Components Analysis (PCA) boundary layer product. The PCA algorithm reduces retrieval noise and artifacts by more accurately accounting for various interferences in SO2 retrievals such as O3 absorption and rotational Raman scattering. The comparisons with the in situ observations indicate a significant improvement of the PCA algorithm in capturing relatively weak volcanic SO2 signals. JF - American Geophysical Union Fall Meeting AU - Selkirk, Henry B AU - Krotkov, Nickolay A AU - Li, Can AU - Morris, Gary AU - Diaz, Jorge Andres AU - Carn, S A AU - Voemel, H AU - Nord, Paul M AU - Larson, Kelsey AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A33I EP - 3307 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/1707520213?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Profiling+the+SO+%28sub+2%29+plume+from+Volcan+Turrialba%3B+ticosonde+balloon+measurements+compared+with+OMI+and+OMPS+retrievals&rft.au=Selkirk%2C+Henry+B%3BKrotkov%2C+Nickolay+A%3BLi%2C+Can%3BMorris%2C+Gary%3BDiaz%2C+Jorge+Andres%3BCarn%2C+S+A%3BVoemel%2C+H%3BNord%2C+Paul+M%3BLarson%2C+Kelsey%3BAnonymous&rft.aulast=Selkirk&rft.aufirst=Henry&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 - Potential impacts of Saharan dust on the African air quality AN - 1707520121; 2015-084164 AB - The largest dust source in the world is the Sahara desert, which occupies most of the northern half of Africa. A recent international modeling experiment conducted under the auspices of the Aerosol Comparisons between Observations and Models (AEROCOM) initiative estimated that the annual dust generation from the Sahara and its peripheries is in the range of 400 to 2200 Tg yr-1. It is estimated that about 240+ or -80 Tg yr-1 of the dust leaves the western shores of Africa on its way across the Atlantic. Therefore, a majority of the dust emitted from and around the Sahara remains and circulates within Africa, potentially affecting the environment, air quality, and human health, among other effects. Given the apparent scarcity of ground-based air-quality monitoring networks in Africa, we are exploring approaches that utilize satellite measurements and regional models to estimate the air-quality impacts of aerosols (particularly those of biomass burning and dust) in northern Hemisphere Africa. Some of the model simulations evaluated using ground-based and satellite observations show that the regional models deliver a high performance in capturing the mixing and transport of biomass-burning (smoke) and dust aerosols. In this presentation, we will share our preliminary results and future perspectives. JF - American Geophysical Union Fall Meeting AU - Ichoku, Charles M AU - Petrenko, Maksym AU - El-Askary, H M AU - Wang, J AU - Yang, Z AU - Yue, Yun AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A31K 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/1707520121?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Potential+impacts+of+Saharan+dust+on+the+African+air+quality&rft.au=Ichoku%2C+Charles+M%3BPetrenko%2C+Maksym%3BEl-Askary%2C+H+M%3BWang%2C+J%3BYang%2C+Z%3BYue%2C+Yun%3BAnonymous&rft.aulast=Ichoku&rft.aufirst=Charles&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Effect of mineral dust on ocean color retrievals from space; a radiative transfer simulation study AN - 1707520088; 2015-084183 AB - Mineral aerosols (dust) are one of the major components of all aerosols found in the Earth's atmosphere. They are mainly soil particles that originate from arid and semiarid regions of the world that can be carried by winds for thousands of kilometers. They are a major impediment in the remote sensing of the ocean color (spectral water-leaving reflectance), because they absorb solar radiation in the UV and visible part of the spectrum and their micro-physical and optical properties are highly variable. Further, there are no reliable working algorithms to detect their presence from spaceborne ocean color observations alone, when they are present in small amount (optical thickness <0.2). In this paper we examine effect of mineral dust on ocean color retrieval from space. We use Ahmad-Fraser's vector radiative transfer (RT) code (v3.0) for ocean-atmosphere system to simulate the pseudo observations (top of atmosphere radiance) for models containing different types of aerosols (absorbing and non-absorbing) in the atmosphere. We consider the mineral aerosols as consisting of an external mixture of illite, kaolinite, montmorillonite, quartz, and calcite with a small amount of hematite (as an internal mixture), which provide the spectral dependence of single scattering albedo consistent with the values reported in the literature. We also vary the aerosol layer height in the atmosphere and amount of chlorophyll in the ocean. The simulated pseudo observations were processed through standard NASA algorithms to determine the ocean color (spectral water-leaving reflectance) and derived chlorophyll in the ocean. Results of the RT simulation study for different Sun-satellite viewing geometry, aerosol layer height and chlorophyll amount in the ocean is presented. JF - American Geophysical Union Fall Meeting AU - Ahmad, Ziauddin AU - Franz, Bryan A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A41F EP - 3112 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/1707520088?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+mineral+dust+on+ocean+color+retrievals+from+space%3B+a+radiative+transfer+simulation+study&rft.au=Ahmad%2C+Ziauddin%3BFranz%2C+Bryan+A%3BAnonymous&rft.aulast=Ahmad&rft.aufirst=Ziauddin&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Predicting the mineral and chemical composition of dust aerosols; evaluation and implications AN - 1707520021; 2015-084158 AB - Soil dust aerosols in Earth system models are typically assumed to have globally uniform properties. However, important climate processes related to dust depend on the aerosol mineral and chemical composition, which varies regionally. Such processes include aerosol radiative forcing, transport of bioavailable iron that catalyzes marine photosynthesis, heterogeneous chemistry, ice nucleation, and cloud condensation.We have implemented a new version of the soil dust aerosol scheme in the NASA GISS Earth System ModelE that takes into account the mineral composition of the dust particles. Dust aerosols are represented as an external mixture of minerals such as illite, kaolinite, smectite, carbonates, quartz, feldspar and gypsum, as well as iron oxides and accretions of iron oxides with each of the these minerals.We present a new publically available compilation of measurements of mineral fractions derived from ca. 50 references from the literature. This compilation is used to evaluate our new model of mineral and elemental composition within ModelE. We discuss the challenges of comparing simulated mineral fractions to measurements, which often come from field campaigns and ship cruises of limited duration. Despite uncertainties of the measurements, we show the importance of estimating the undisturbed size distribution of the parent soil prior to wet sieving, along with the modification of this size distribution during emission. In particular, our new model reproduces measurements showing greater amount of aerosols at silt sizes (whose diameters exceed 2 mu m) including significant amounts of clay mineral aerosols (like illite) at silt sizes. Our model also reduces the systematic overestimation of quartz, while allowing iron to be transported farther from its source as impurities than in its pure, crystalline form. JF - American Geophysical Union Fall Meeting AU - Perlwitz, Jan P AU - Garcia-Pando, Carlos Perez AU - Miller, Ron L AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract A31A EP - 3008 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/1707520021?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+the+mineral+and+chemical+composition+of+dust+aerosols%3B+evaluation+and+implications&rft.au=Perlwitz%2C+Jan+P%3BGarcia-Pando%2C+Carlos+Perez%3BMiller%2C+Ron+L%3BAnonymous&rft.aulast=Perlwitz&rft.aufirst=Jan&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Peroxy defects in rock-forming minerals in the Earth's crust and their role in resolving some of the longest-lasting paradoxes across the geosciences AN - 1703691203; 2015-078659 AB - Peroxy defects, first described in the 1980's, can provide explanations for enigmas and paradoxes that limit our understanding of the Earth. Peroxy defects consist of pairs of oxygen anions that changed their valence from 2- to 1- through a redox conversion (RC) of hydroxyl pairs, Si-OH HO-Si = Si-OO-Si + H (sub 2) . RC takes place during cooling when temperatures drop below the range in which thermodynamic equilibrium can be maintained. H (sub 2) molecules are diffusively mobile and hard to detect. Peroxy defects are inconspicuous and even harder to detect. When peroxy defects break, they release highly mobile electronic charge carriers, chemically O (super -) in a matrix of O (super 2-) , defect electrons in the O (super 2-) sublattice. Known as positive holes (p-holes for short) these charge carriers reside in the O 2sp-type energy levels at the upper edge of the valence band. They have the amazing ability to flow out of the rock volumes, in which they are generated. The p-holes propagate fast ( nearly equal 100 m/sec) and far (m's in the lab, km's in the field). The p-hole outflow represents an electric current. When p-holes flow into bodies of water, they oxidize H (sub 2) O to H (sub 2) O (sub 2) . When they arrive at Earth's surface, they cause high electric (E) fields. Air molecules, probably O (sub 2) +, become field-ionized, rising through the atmospheric column, leading to moisture condensation in the troposphere, mesospheric lightning, ionospheric perturbations. Break-up of peroxy defects is achieved by stressing rocks and by heating. Intrusion of magmas into crustal rocks activates p-holes, which flow down temperature gradients, causing electrochemical potentials between the magma bodies and the country rocks. This leads to electrochemically driven diffusion processes that cause highly diffusive ions such as H (super +) and Na (super +) to be added to the magma. Hence, p-holes are important for petrogenesis. Lastly, knowledge about "water" in Earth's upper mantle is based on analyses of hydroxyls in nominally anhydrous minerals, either by IR or SIMS or similar techniques. If the majority of the solute Si-OH in minerals like olivine has undergone RC during cooling from upper mantle to Earth surface temperatures, most Si-OH will have converted to peroxy plus H (sub 2) . Hence, looking for hydroxyls, even looking for H, is the wrong way to find out how much "water" is in the Earth's mantle. JF - American Geophysical Union Fall Meeting AU - Freund, F T AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S51B EP - 4458 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/1703691203?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Peroxy+defects+in+rock-forming+minerals+in+the+Earth%27s+crust+and+their+role+in+resolving+some+of+the+longest-lasting+paradoxes+across+the+geosciences&rft.au=Freund%2C+F+T%3BAnonymous&rft.aulast=Freund&rft.aufirst=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 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 - Corona formation on Venus via extension and lithospheric instability AN - 1700098270; 2015-073642 AB - Given the absence of plate tectonics on Venus, the origin of major rift systems like Parga Chasma is unclear. As Venus and Earth have similar radii and radiogenic abundances, we assume they have a similar internal structure and composition. Venus does not appear to have plate tectonics, and its surface displays a range of volcanic and tectonic features, including those that are both similar and dissimilar to those on Earth. In order to understand how Venus loses its heat, we study coronae at Parga Chasma. There are over 500 quasi-circular volcano-tectonic features called coronae on Venus, 131 of which are associated with Parga Chasma. Are these coronae important in the formation of the rift, or vice versa? How do they contribute to planetary heat loss? Coronae are believed to form via small-scale mantle upwellings, lithospheric instability, or a combination thereof. However, the genetic link between the coronae and rifts has remained unclear. By drawing an analogy to the East African Rift, we propose a mechanism for the formation of off-rift coronae due to the rifting process. We model the interaction of a rising mantle plume associated with a rift with a preexisting layer of dense material at the lithosphere-mantle boundary and show that a rift and its associated off-rift coronae may be genetically linked. We calculate the resulting surface topographies, melt volumes, and Bouguer gravity anomalies and find a correlation to observations. JF - American Geophysical Union Fall Meeting AU - Piskorz, D AU - Elkins-Tanton, L T AU - Smrekar, S E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract T33B EP - 4657 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/1700098270?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Corona+formation+on+Venus+via+extension+and+lithospheric+instability&rft.au=Piskorz%2C+D%3BElkins-Tanton%2C+L+T%3BSmrekar%2C+S+E%3BAnonymous&rft.aulast=Piskorz&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 - 2015-07-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Assessment of radar-derived snow depth over Arctic sea ice AN - 1696877656; 2015-069355 AB - Knowledge of contemporaneous snow depth on Arctic sea ice is important both to constrain the regional climatology and to improve the accuracy of satellite altimeter estimates of sea ice thickness. We assess new data available from the NASA Operation IceBridge snow radar instrument and derive snow depth estimates across the western Arctic ice pack using a novel methodology based on wavelet techniques that define the primary reflecting surfaces within the snow pack. We assign uncertainty to the snow depth estimates based upon both the radar system parameters and sea ice topographic variability. The accuracy of the airborne snow depth estimates are examined via comparison with coincident measurements gathered in situ across a range of ice types in the Beaufort Sea. We discuss the effect of surface morphology on the derivation, and consequently the accuracy, of airborne snow depth estimates. We find that snow depths derived from the airborne snow radar using the wavelet-based technique are accurate to 1 cm over level ice. Over rougher surfaces including multiyear and ridged ice, the radar system is impacted by ice surface morphology. Across basin scales, we find the snow-radar-derived snow depth on first-year ice is at least approximately 60% of the value reported in the snow climatology for the Beaufort Sea, Canada Basin, and parts of the central Arctic, since these regions were previously dominated by multiyear ice during the measurement period of the climatology. Snow on multiyear ice is more consistent with the climatology. Abstract Copyright (2014), The Authors. JF - Journal of Geophysical Research: Oceans AU - Newman, Thomas AU - Farrell, Sinead L AU - Richter-Menge, Jacqueline AU - Connor, Laurence N AU - Kurtz, Nathan T AU - Elder, Bruce C AU - McAdoo, David Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 8578 EP - 8602 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 12 SN - 2169-9275, 2169-9275 KW - snow cover KW - sea ice KW - radar methods KW - ice cover KW - global change KW - distribution KW - depth KW - climate change KW - ice KW - snow KW - Arctic Ocean KW - global warming KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877656?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Assessment+of+radar-derived+snow+depth+over+Arctic+sea+ice&rft.au=Newman%2C+Thomas%3BFarrell%2C+Sinead+L%3BRichter-Menge%2C+Jacqueline%3BConnor%2C+Laurence+N%3BKurtz%2C+Nathan+T%3BElder%2C+Bruce+C%3BMcAdoo%2C+David&rft.aulast=Newman&rft.aufirst=Thomas&rft.date=2014-12-01&rft.volume=119&rft.issue=12&rft.spage=8578&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2014JC010284 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. incl. 2 tables, sketch map N1 - Last updated - 2015-07-17 N1 - SubjectsTermNotLitGenreText - Arctic Ocean; climate change; depth; distribution; global change; global warming; ice; ice cover; radar methods; sea ice; snow; snow cover DO - http://dx.doi.org/10.1002/2014JC010284 ER - TY - JOUR T1 - Methane pools within the Glacial Lake Agassiz Peatlands (GLAP) and their response to climatic change AN - 1676592154; 2015-037878 AB - Global warming may destabilize the carbon pool in northern peatlands but it remains uncertain how climatic patterns regulate the transformation of solid-phase peat into greenhouse gases. Here we present a 43-year record of changes in the pore water chemistry from a major peat basin in northern Minnesota. These data indicate that methane production and its transient storage within bogs and fens is finely tuned to climatically driven flow systems on multiple time scales. The peak zones for methanogenesis were apparently limited to the uppermost peat strata during a dry climatic period (1965-1983) when shallow recharge systems prevailed across the GLAP. The shift to a moister climate after 1990 strengthened downward transport systems across the region greatly expanding the vertical supply of labile root exudates and the peak production zones for methanogenesis in peat profiles. Large methane pools accumulated within the GLAP from 1990 through 2008. Dissolved methane concentrations were 2-to-4 times greater within the deeper peat (1-4 m) than above and were generally higher within bog landforms than in sedge fens. The size of these methane pools varied in response to seasonal and interannual climatic oscillations that apparently affected emission rates via ebullition (from deep peat) and wicking through plant stoma (from the rhizosphere). However, methane pools remained relatively stable during this period, except for a large change between 1990 and 1991. One remaining element of uncertainty concerns the transformation of dissolved methane to free-phase bubbles, which can represent 10-20% of peat volume in the GLAP. Nevertheless, methane profiles from the GLAP indicate that the entire peat profile can function as an incubator for methane depending on the prevailing climate regime and downward transport of labile carbon substrates. JF - American Geophysical Union Fall Meeting AU - Glaser, P H AU - Chanton, J AU - Siegel, D I AU - Reeve, A S AU - Corbett, J E AU - Rosenberry, D O AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B24C EP - 05 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/1676592154?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Methane+pools+within+the+Glacial+Lake+Agassiz+Peatlands+%28GLAP%29+and+their+response+to+climatic+change&rft.au=Glaser%2C+P+H%3BChanton%2C+J%3BSiegel%2C+D+I%3BReeve%2C+A+S%3BCorbett%2C+J+E%3BRosenberry%2C+D+O%3BAnonymous&rft.aulast=Glaser&rft.aufirst=P&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 - Arctic-COLORS (Coastal Land Ocean Interactions in the Arctic); a NASA field campaign scoping study to examine land-ocean interactions in the Arctic AN - 1676588872; 2015-037992 AB - The Arctic region is warming faster than anywhere else on the planet, triggering rapid social and economic changes and impacting both terrestrial and marine ecosystems. Yet our understanding of critical processes and interactions along the Arctic land-ocean interface is limited. Arctic-COLORS is a Field Campaign Scoping Study funded by NASA's Ocean Biology and Biogeochemistry Program that aims to improve understanding and prediction of land-ocean interactions in a rapidly changing Arctic coastal zone, and assess vulnerability, response, feedbacks and resilience of coastal ecosystems, communities and natural resources to current and future pressures. Specific science objectives include: - Quantify lateral fluxes to the arctic inner shelf from (i) rivers and (ii) the outer shelf/basin that affect biology, biodiversity, biogeochemistry (i.e. organic matter, nutrients, suspended sediment), and the processing rates of these constituents in coastal waters. - Evaluate the impact of the thawing of Arctic permafrost within the river basins on coastal biology, biodiversity and biogeochemistry, including various rates of community production and the role these may play in the health of regional economies. - Assess the impact of changing Arctic landfast ice and coastal sea ice dynamics. - Establish a baseline for comparison to future change, and use state-of-the-art models to assess impacts of environmental change on coastal biology, biodiversity and biogeochemistry. A key component of Arctic-COLORS will be the integration of satellite and field observations with coupled physical-biogeochemical models for predicting impacts of future pressures on Arctic, coastal ocean, biological processes and biogeochemical cycles. Through interagency and international collaborations, and through the organization of dedicated workshops, town hall meetings and presentations at international conferences, the scoping study engages the broader scientific community and invites participation of experts from a wide range of disciplines, to refine our science objectives and outline detailed research strategies needed to attain these objectives. The deliverable will be a comprehensive report to NASA outlining the major scientific questions, and developing the initial study design and implementation concept. JF - American Geophysical Union Fall Meeting AU - Hernes, P AU - Tzortziou, Maria A AU - Salisbury, Joe AU - Mannino, Antonio AU - Matrai, P AU - Friedrichs, M A AU - del Castillo, Carlos E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B43B EP - 0242 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676588872?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Arctic-COLORS+%28Coastal+Land+Ocean+Interactions+in+the+Arctic%29%3B+a+NASA+field+campaign+scoping+study+to+examine+land-ocean+interactions+in+the+Arctic&rft.au=Hernes%2C+P%3BTzortziou%2C+Maria+A%3BSalisbury%2C+Joe%3BMannino%2C+Antonio%3BMatrai%2C+P%3BFriedrichs%2C+M+A%3Bdel+Castillo%2C+Carlos+E%3BAnonymous&rft.aulast=Hernes&rft.aufirst=P&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 - Flux chamber measurements of methane emissions and stable isotope composition from an Arctic wetland using field-deployed real-time CRDS vs lab measurements AN - 1676588433; 2015-037997 AB - The emission of CH4 from Arctic landscapes under warming climate is an important feedback in Earth's climate system. Studies of CH4 flux from Arctic wetlands have been growing in recent years, but few provide details on biogeochemical controls. Stable isotopic measurements help elucidate methane production and consumption pathways and offer important understanding about dynamics of CH4 cycling in Arctic systems. In order to demonstrate the possible instrumental approaches to measuring methane dynamics of wetlands in the Arctic, a fringing wetland of a small lake near the Russell Glacier in Southwestern Greenland was outfitted with static flux chambers and instrumented with a field-deployable Cavity Ring Down Spectrometer (CRDS) to measure real-time concentrations of CH4 and CO2 and their stable carbon isotopes. Several different wetland plant communities were included in the flux chamber experiments and field tests were conducted during several weeks in July 2014. Analytical measurements by CRDS were compared to batch samples analyzed in the laboratory using both Off-Axis Integrated Cavity Output Spectroscopy (ICOS) and Gas Chromatography-Combustion-Isotope Ratio Mass Spectrometry (GC-C-IRMS) with cryogenic pre-concentration. Results from flux chamber deployments will be presented and comparisons between the real-time field measurements and laboratory instrumental techniques will be evaluated. JF - American Geophysical Union Fall Meeting AU - Thompson, H A AU - Stern, Jennifer C AU - Graham, H V AU - Pratt, L M AU - White, J R AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B43B EP - 0247 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/1676588433?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Flux+chamber+measurements+of+methane+emissions+and+stable+isotope+composition+from+an+Arctic+wetland+using+field-deployed+real-time+CRDS+vs+lab+measurements&rft.au=Thompson%2C+H+A%3BStern%2C+Jennifer+C%3BGraham%2C+H+V%3BPratt%2C+L+M%3BWhite%2C+J+R%3BAnonymous&rft.aulast=Thompson&rft.aufirst=H&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - The methane to carbon dioxide ratio produced during peatland decomposition and a simple approach for distinguishing this ratio AN - 1676587762; 2015-038031 AB - Peatland organic matter is cellulose-like with an oxidation state of approximately zero. When this material decomposes by fermentation, stoichiometry dictates that CH4 and CO2 should be produced in a ratio approaching one. While this is generally the case in temperate zones, this production ratio is often departed from in boreal peatlands, where the ratio of belowground CH4/CO2 production varies between 0.1 and 1, indicating CO2 production by a mechanism in addition to fermentation. The in situ CO2/CH4 production ratio may be ascertained by analysis of the 13C isotopic composition of these products, because CO2 production unaccompanied by methane production produces CO2 with an isotopic composition similar to the parent organic matter while methanogenesis produces 13C depleted methane and 13C enriched CO2. The 13C enrichment in the subsurface CO2 pool is directly related to the amount of if formed from methane production and the isotopic composition of the methane itself. Excess CO2 production is associated with more acidic conditions, Sphagnum vegetation, high and low latitudes, methane production dominated by hydrogenotrophic methane production, 13C depleted methane, and generally, more nutrient depleted conditions. Three theories have been offered to explain these observations- 1) inhibition of acetate utilization, acetate build-up and diffusion to the surface and eventual aerobic oxidation, 2) the use of humic acids as electron acceptors, and the 3) utilization of organic oxygen to produce CO2. In support of #3, we find that 13C-NMR, Fourier transform infrared (FT IR) spectroscopy, and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) clearly show the evolution of polysaccharides and cellulose towards more decomposed humified alkyl compounds stripped of organic oxygen utilized to form CO2. Such decomposition results in more negative carbon oxidation states varying from -1 to -2. Coincident with this reduction in oxidation state, is the greater production of methane. Changing climatic conditions may alter the balance of the factors which affect the CO2/CH4 ratio by changing the water balance of the peatland, nutrient status, or temperature. JF - American Geophysical Union Fall Meeting AU - Chanton, J AU - Hodgkins, S B AU - Cooper, W T AU - Glaser, P H AU - Corbett, J E AU - Crill, Patrick M AU - Saleska, S R AU - Rich, V I AU - Holmes, B AU - Hines, Mark E AU - Tfaily, Malak AU - Kostka, Joel E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B44A 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/1676587762?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info: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+methane+to+carbon+dioxide+ratio+produced+during+peatland+decomposition+and+a+simple+approach+for+distinguishing+this+ratio&rft.au=Chanton%2C+J%3BHodgkins%2C+S+B%3BCooper%2C+W+T%3BGlaser%2C+P+H%3BCorbett%2C+J+E%3BCrill%2C+Patrick+M%3BSaleska%2C+S+R%3BRich%2C+V+I%3BHolmes%2C+B%3BHines%2C+Mark+E%3BTfaily%2C+Malak%3BKostka%2C+Joel+E%3BAnonymous&rft.aulast=Chanton&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 - 2015-04-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Implications of clay mineral-RNA interactions for the origin of life AN - 1676587409; 2015-037917 AB - Due to its ability to both store information and catalyze reactions, RNA is considered by many to have been the dominant biopolymer at the origin of life. We are screening a large, random RNA population for catalytic activity in the presence and absence of prebiotically relevant clay minerals, to investigate the effect of RNA-clay mineral interactions on RNA function. There is an extensive precedent for screening RNA populations for enzymatic functions such as ligation, cleavage and binding in the laboratory. While several environmental parameters have been explored, previous screens have not considered geological interactions. This is surprising as the role of clay minerals has featured prominently in many origin of life theories. Recent empirical evidence demonstrating that clay minerals can adsorb and protect RNA molecules as well as catalyze RNA polymerization has specifically reinvigorated the proposed importance of clay mineral-RNA interactions. Although the identity of the first true biomolecules remains uncertain, interaction between emerging life and its geological environment appears inevitable. We therefore consider understanding the effect of geological-biological interactions to be of crucial importance when considering the earliest biopolymers at the origin of life. Our screens are from a random population of 10 (super 14) unique random RNA sequences and are conducted with and without montmorillonite clay. We are screening for the ability of sequences to self cleave, one of the most basic enzymatic functions considered important to the earliest biopolymers. Our RNA function screens will therefore illuminate the effect of geological interactions at a crucial stage of early evolution. JF - American Geophysical Union Fall Meeting AU - Stephenson, James D AU - Ditzler, Mark A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract B31E EP - 0073 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676587409?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Implications+of+clay+mineral-RNA+interactions+for+the+origin+of+life&rft.au=Stephenson%2C+James+D%3BDitzler%2C+Mark+A%3BAnonymous&rft.aulast=Stephenson&rft.aufirst=James&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 gravity field, orientation, and ephemeris of Mercury from MESSENGER observations after three years in orbit AN - 1660630246; 2015-021785 AB - We have analyzed 3 years of radio tracking data from the MESSENGER spacecraft in orbit around Mercury and determined the gravity field, planetary orientation, and ephemeris of the innermost planet. With improvements in spatial coverage, force modeling, and data weighting, we refined an earlier global gravity field both in quality and resolution, and we present here a spherical harmonic solution to degree and order 50. In this field, termed HgM005, uncertainties in low-degree coefficients are reduced by an order of magnitude relative to earlier global fields, and we obtained a preliminary value of the tidal Love number k (sub 2) of 0.451 + or - 0.014. We also estimated Mercury's pole position, and we obtained an obliquity value of 2.06 + or - 0.16 arcmin, in good agreement with analysis of Earth-based radar observations. From our updated rotation period (58.646146 + or - 0.000011 days) and Mercury ephemeris, we verified experimentally the planet's 3:2 spin-orbit resonance to greater accuracy than previously possible. We present a detailed analysis of the HgM005 covariance matrix, and we describe some near-circular frozen orbits around Mercury that could be advantageous for future exploration. Abstract Copyright (2014), . The Authors. JF - Journal of Geophysical Research: Planets AU - Mazarico, Erwan AU - Genova, Antonio AU - Goossens, Sander AU - Lemoine, Frank G AU - Neumann, Gregory A AU - Zuber, Maria T AU - Smith, David E AU - Solomon, Sean C Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2417 EP - 2436 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 12 SN - 2169-9097, 2169-9097 KW - terrestrial planets KW - planets KW - gravity anomalies KW - gravity field KW - topography KW - ephemeris KW - spacecraft KW - Mercury Planet KW - MESSENGER KW - orbital observations KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660630246?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=The+gravity+field%2C+orientation%2C+and+ephemeris+of+Mercury+from+MESSENGER+observations+after+three+years+in+orbit&rft.au=Mazarico%2C+Erwan%3BGenova%2C+Antonio%3BGoossens%2C+Sander%3BLemoine%2C+Frank+G%3BNeumann%2C+Gregory+A%3BZuber%2C+Maria+T%3BSmith%2C+David+E%3BSolomon%2C+Sean+C&rft.aulast=Mazarico&rft.aufirst=Erwan&rft.date=2014-12-01&rft.volume=119&rft.issue=12&rft.spage=2417&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004675 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 62 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-03-05 N1 - SubjectsTermNotLitGenreText - ephemeris; gravity anomalies; gravity field; Mercury Planet; MESSENGER; orbital observations; planets; remote sensing; spacecraft; terrestrial planets; topography DO - http://dx.doi.org/10.1002/2014JE004675 ER - TY - JOUR T1 - The vertical distribution of Martian aerosol particle size AN - 1660630237; 2015-021797 AB - Using approximately 410 limb-viewing observations from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), we retrieve the vertical distribution of Martian dust and water ice aerosol particle sizes. We find that dust particles have an effective radius of 1.0 mu m over much of the atmospheric column below 40 km throughout the Martian year. This includes the detached tropical dust layers detected in previous studies. Little to no variation with height is seen in dust particle size. Water ice clouds within the aphelion cloud belt exhibit a strong sorting of particle size with height, however, and the effective radii range from >3 mu m below 20 km to near 1.0 mu m at 40 km altitude. Conversely, water ice clouds in the seasonal polar hoods show a near-uniform particle size with an effective radius of approximately 1.5 mu m throughout the atmospheric column. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Guzewich, Scott D AU - Smith, Michael D AU - Wolff, Michael J Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2694 EP - 2708 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 12 SN - 2169-9097, 2169-9097 KW - water KW - clouds KW - imagery KW - CRISM KW - clastic sediments KW - atmosphere KW - Mars Reconnaissance Orbiter KW - Mars KW - distribution KW - size KW - infrared spectra KW - terrestrial planets KW - planets KW - ice KW - fine-grained materials KW - dust KW - sediments KW - sorting KW - aerosols KW - spectra KW - spectroscopy KW - nanoparticles KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660630237?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=The+vertical+distribution+of+Martian+aerosol+particle+size&rft.au=Guzewich%2C+Scott+D%3BSmith%2C+Michael+D%3BWolff%2C+Michael+J&rft.aulast=Guzewich&rft.aufirst=Scott&rft.date=2014-12-01&rft.volume=119&rft.issue=12&rft.spage=2694&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004704 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 38 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-03-05 N1 - SubjectsTermNotLitGenreText - aerosols; atmosphere; clastic sediments; clouds; CRISM; distribution; dust; fine-grained materials; ice; imagery; infrared spectra; Mars; Mars Reconnaissance Orbiter; nanoparticles; planets; sediments; size; sorting; spectra; spectroscopy; terrestrial planets; water DO - http://dx.doi.org/10.1002/2014JE004704 ER - TY - JOUR T1 - Search for a high-altitude lunar dust exosphere using Clementine navigational star tracker measurements AN - 1660629925; 2015-021790 AB - During the 1994 Clementine lunar mapping mission, portions of 25 orbits were dedicated to a search for lunar horizon glow (LHG) using the spacecraft star tracker navigation cameras. Previous putative detections of LHG were believed to result from forward scattering of sunlight by exospheric dust grains with radii approximately 0.1 mu m, observable above the limb from within the shadow of the Moon near orbital sunrise or sunset. We have examined star tracker image sequences from five Clementine orbits in which the limb occulted the Sun, and was at least partially shadowed from earthshine, minimizing the chance of stray light contamination. No LHG appears in the image data, or in any of the net brightness images, after subtraction of a reference zodiacal light model. However, some of the images display faint excess limb brightness that appears to be solar streamer structure. Therefore, we derive upper limits for the amount of dust in the lunar exosphere that could be hidden by these brightness fluctuations using a dust-scattering simulation code and simple exponential dust profiles defined by surface concentration n (sub 0) and scale height H. Simulations using grains of radius 0.1 mu m show that fluctuations in the observed excess brightness can be matched by a dust exosphere with a vertical column abundance n (sub 0) H of 5-30 cm (super -2) and overlying mass <10 (super -12) g cm (super -2) . These dust upper limit estimates are highly dependent on assumed grain size due to the rapid increase in per-grain brightness with grain radius. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Glenar, David A AU - Stubbs, Timothy J AU - Hahn, Joseph M AU - Wang, Yongli Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2548 EP - 2567 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 12 SN - 2169-9097, 2169-9097 KW - Moon KW - clastic sediments KW - altitude KW - grain size KW - fines KW - exosphere KW - brightness KW - spatial distribution KW - dust KW - sediments KW - Clementine Program KW - orbital observations KW - nanoparticles KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660629925?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Search+for+a+high-altitude+lunar+dust+exosphere+using+Clementine+navigational+star+tracker+measurements&rft.au=Glenar%2C+David+A%3BStubbs%2C+Timothy+J%3BHahn%2C+Joseph+M%3BWang%2C+Yongli&rft.aulast=Glenar&rft.aufirst=David&rft.date=2014-12-01&rft.volume=119&rft.issue=12&rft.spage=2548&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004702 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 50 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-03-05 N1 - SubjectsTermNotLitGenreText - altitude; brightness; clastic sediments; Clementine Program; dust; exosphere; fines; grain size; Moon; nanoparticles; orbital observations; remote sensing; sediments; spatial distribution DO - http://dx.doi.org/10.1002/2014JE004702 ER - TY - JOUR T1 - The location of Airy-0, the Mars prime meridian reference, from stereo photogrammetric processing of THEMIS IR imaging and digital elevation data AN - 1660629872; 2015-021788 AB - The small crater Airy-0 was selected from Mariner 9 images to be the reference for the Mars prime meridian. Initial analyses in the year 2000 tied Viking Orbiter and Mars Orbiter Camera images of Airy-0 to the evolving Mars Orbiter Laser Altimeter global digital terrain model to update the location of Airy-0. Based upon this tie and radiometric tracking of landers/rovers from Earth, new expressions for the Mars spin axis direction, spin rate, and prime meridian epoch value were produced to define the orientation of the Martian surface in inertial space over time. Since the Mars Global Surveyor mission and Mars Orbiter Laser Altimeter global digital terrain model were completed some time ago, a more exhaustive study has been performed to determine the accuracy of the Airy-0 location and orientation of Mars at the standard epoch. Thermal Emission Imaging System (THEMIS) IR image cubes of the Airy and Gale crater regions were tied to the global terrain grid using precision stereo photogrammetric image processing techniques. The Airy-0 location was determined to be about 0.001 degrees east of its predicted location using the currently defined International Astronomical Union (IAU) prime meridian location. Information on this new location and how it was derived will be provided to the NASA Mars Exploration Program Geodesy and Cartography Working Group for their assessment. This NASA group will make a recommendation to the IAU Working Group on Cartographic Coordinates and Rotational Elements to update the expression for the Mars spin axis direction, spin rate, and prime meridian location. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Duxbury, T C AU - Christensen, P AU - Smith, D E AU - Neumann, G A AU - Kirk, R L AU - Caplinger, M A AU - Albee, A A AU - Seregina, N V AU - Neukum, G AU - Archinal, B A Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2471 EP - 2486 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 12 SN - 2169-9097, 2169-9097 KW - Airy KW - THEMIS KW - elevation KW - government agencies KW - Viking Program KW - Mars KW - mapping KW - photogrammetry KW - digital terrain models KW - infrared spectra KW - terrestrial planets KW - planets KW - NASA KW - Mariner Program KW - Mars Global Surveyor Program KW - MOLA KW - spectra KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660629872?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=The+location+of+Airy-0%2C+the+Mars+prime+meridian+reference%2C+from+stereo+photogrammetric+processing+of+THEMIS+IR+imaging+and+digital+elevation+data&rft.au=Duxbury%2C+T+C%3BChristensen%2C+P%3BSmith%2C+D+E%3BNeumann%2C+G+A%3BKirk%2C+R+L%3BCaplinger%2C+M+A%3BAlbee%2C+A+A%3BSeregina%2C+N+V%3BNeukum%2C+G%3BArchinal%2C+B+A&rft.aulast=Duxbury&rft.aufirst=T&rft.date=2014-12-01&rft.volume=119&rft.issue=12&rft.spage=2471&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004678 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 23 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Airy; digital terrain models; elevation; government agencies; infrared spectra; mapping; Mariner Program; Mars; Mars Global Surveyor Program; MOLA; NASA; photogrammetry; planets; spectra; terrestrial planets; THEMIS; Viking Program DO - http://dx.doi.org/10.1002/2014JE004678 ER - TY - JOUR T1 - Imprint of the Rheasilvia impact on Vesta; geologic mapping of Quadrangles Gegania and Lucaria AN - 1656038621; 2015-013728 AB - We produced two 1:250,000 scale geologic maps of the adjacent quadrangles Av-6 Gegania and Av-7 Lucaria, located in the equatorial region of (4) Vesta (0-144 degrees E, 22 degrees S to 22 degrees N). The mapping is based on clear and color filter images of the Framing Camera (FC) onboard the Dawn spacecraft, which has captured the entire illuminated surface of Vesta with high spatial resolution (up to approximately 20 m/pixel), and on a digital terrain model derived from FC imagery. Besides the geologic mapping itself, a secondary purpose of this work is to investigate one of the most prominent morphological features on Vesta, namely the aggregation of several giant equatorial troughs termed the Divalia Fossae, most probably formed during the Rheasilvia impact near Vesta's south pole. The up to 465 km long and 22 km wide troughs show height differences of up to 5 km between adjacent troughs and ridges. Another imprint of the Rheasilvia impact is the >350 km long and approximately 250 km wide swath of ejecta crossing quadrangle Av-6 Gegania. This lobe shows a distinct appearance in FC color ratios and a high albedo in FC images, indicating a mineralogical similarity to material typically found within the Rheasilvia basin, in particular composed of diogenite-rich howardites. Almost the entire northern half of the mapping area shows the oldest surface, being dominated by upper crustal basaltic material. To the south, increasingly younger formations related to the Rheasilvia impact occur, either indicated by the troughs formed by Rheasilvia or by the Rheasilvia ejecta itself. Only medium sized impact craters with diameters less than 22 km occur within the two mapped quadrangles. Some of the craters exhibit ejecta blankets and/or distinctly dark or bright ejecta material in ejecta rays outside and exposures within the crater, and mass-wasting deposits down crater slopes, forming the youngest surfaces. JF - Icarus AU - Schaefer, Michael AU - Nathues, Andreas AU - Williams, David A AU - Mittlefehldt, David W AU - Le Corre, Lucille AU - Buczkowski, Debra L AU - Kneissl, Thomas AU - Thangjam, Guneshwar S AU - Hoffmann, Martin AU - Schmedemann, Nico AU - Schaefer, Tanja AU - Scully, Jennifer E C AU - Li, Jian-Yang AU - Reddy, Vishnu AU - Garry, W Brent AU - Krohn, Katrin AU - Yingst, R Aileen AU - Gaskell, Robert W AU - Russell, Christopher T Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 60 EP - 73 PB - Elsevier, New York, NY VL - 244 SN - 0019-1035, 0019-1035 KW - albedo KW - imagery KW - stony meteorites KW - impact features KW - asteroids KW - Aelia Crater KW - Rheasilvia Basin KW - Occia Crater KW - mapping KW - digital terrain models KW - Dawn Mission KW - Rubria Crater KW - meteorites KW - Serena Crater KW - Lucaria Tholus KW - howardite KW - mass movements KW - surface features KW - Divalia Fossae Formation KW - Octavia Crater KW - Vesta Asteroid KW - Rheasilvia Formation KW - Gegania Crater KW - diogenite KW - Gegania Quadrangle KW - impacts KW - Saturnalia Fossae Formation KW - ejecta KW - achondrites KW - troughs KW - Rufillia Crater KW - Framing Camera KW - Divalia Fossae KW - Lucaria Quadrangle KW - eucrite KW - Publicia Crater KW - impact craters KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656038621?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Imprint+of+the+Rheasilvia+impact+on+Vesta%3B+geologic+mapping+of+Quadrangles+Gegania+and+Lucaria&rft.au=Schaefer%2C+Michael%3BNathues%2C+Andreas%3BWilliams%2C+David+A%3BMittlefehldt%2C+David+W%3BLe+Corre%2C+Lucille%3BBuczkowski%2C+Debra+L%3BKneissl%2C+Thomas%3BThangjam%2C+Guneshwar+S%3BHoffmann%2C+Martin%3BSchmedemann%2C+Nico%3BSchaefer%2C+Tanja%3BScully%2C+Jennifer+E+C%3BLi%2C+Jian-Yang%3BReddy%2C+Vishnu%3BGarry%2C+W+Brent%3BKrohn%2C+Katrin%3BYingst%2C+R+Aileen%3BGaskell%2C+Robert+W%3BRussell%2C+Christopher+T&rft.aulast=Schaefer&rft.aufirst=Michael&rft.date=2014-12-01&rft.volume=244&rft.issue=&rft.spage=60&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.06.026 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 30 N1 - PubXState - NY N1 - Document feature - illus. incl. geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-04-16 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - achondrites; Aelia Crater; albedo; asteroids; Dawn Mission; digital terrain models; diogenite; Divalia Fossae; Divalia Fossae Formation; ejecta; eucrite; Framing Camera; Gegania Crater; Gegania Quadrangle; howardite; imagery; impact craters; impact features; impacts; Lucaria Quadrangle; Lucaria Tholus; mapping; mass movements; meteorites; Occia Crater; Octavia Crater; Publicia Crater; Rheasilvia Formation; Rheasilvia Basin; Rubria Crater; Rufillia Crater; Saturnalia Fossae Formation; Serena Crater; stony meteorites; surface features; troughs; Vesta Asteroid DO - http://dx.doi.org/10.1016/j.icarus.2014.06.026 ER - TY - JOUR T1 - The chronostratigraphy of protoplanet Vesta AN - 1656038571; 2015-013734 AB - In this paper we present a time-stratigraphic scheme and geologic time scale for the protoplanet Vesta, based on global geologic mapping and other analyses of NASA Dawn spacecraft data, complemented by insights gained from laboratory studies of howardite-eucrite-diogenite (HED) meteorites and geophysical modeling. On the basis of prominent impact structures and their associated deposits, we propose a time scale for Vesta that consists of four geologic time periods: Pre-Veneneian, Veneneian, Rheasilvian, and Marcian. The Pre-Veneneian Period covers the time from the formation of Vesta up to the Veneneia impact event, from 4.6 Ga to >2.1 Ga (using the asteroid flux-derived chronology system) or from 4.6 Ga to 3.7 Ga (under the lunar-derived chronology system). The Veneneian Period covers the time span between the Veneneia and Rheasilvia impact events, from >2.1 to 1 Ga (asteroid flux-derived chronology) or from 3.7 to 3.5 Ga (lunar-derived chronology), respectively. The Rheasilvian Period covers the time span between the Rheasilvia and Marcia impact events, and the Marcian Period covers the time between the Marcia impact event until the present. The age of the Marcia impact is still uncertain, but our current best estimates from crater counts of the ejecta blanket suggest an age between approximately 120 and 390 Ma, depending upon choice of chronology system used. Regardless, the Marcia impact represents the youngest major geologic event on Vesta. Our proposed four-period geologic time scale for Vesta is, to a first order, comparable to those developed for other airless terrestrial bodies JF - Icarus AU - Williams, David A AU - Jaumann, Ralf AU - McSween, H Y, Jr AU - Marchi, Simone AU - Schmedemann, Nico AU - Raymond, Carol A AU - Russell, Christopher T Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 158 EP - 165 PB - Elsevier, New York, NY VL - 244 SN - 0019-1035, 0019-1035 KW - stony meteorites KW - impact features KW - asteroids KW - Vesta Asteroid KW - chronostratigraphy KW - HED meteorites KW - Marcian KW - planetesimals KW - Dawn Mission KW - achondrites KW - weathering KW - time scales KW - models KW - meteorites KW - space weathering KW - Veneneian KW - Pre-Veneneian KW - Rheasilvian KW - impact craters KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656038571?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+chronostratigraphy+of+protoplanet+Vesta&rft.au=Williams%2C+David+A%3BJaumann%2C+Ralf%3BMcSween%2C+H+Y%2C+Jr%3BMarchi%2C+Simone%3BSchmedemann%2C+Nico%3BRaymond%2C+Carol+A%3BRussell%2C+Christopher+T&rft.aulast=Williams&rft.aufirst=David&rft.date=2014-12-01&rft.volume=244&rft.issue=&rft.spage=158&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.06.027 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 73 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-02-19 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - achondrites; asteroids; chronostratigraphy; Dawn Mission; HED meteorites; impact craters; impact features; Marcian; meteorites; models; planetesimals; Pre-Veneneian; Rheasilvian; space weathering; stony meteorites; time scales; Veneneian; Vesta Asteroid; weathering DO - http://dx.doi.org/10.1016/j.icarus.2014.06.027 ER - TY - JOUR T1 - Introduction; the geologic mapping of Vesta AN - 1656038311; 2015-013724 JF - Icarus AU - Williams, David A AU - Yingst, R Aileen AU - Garry, W Brent Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 1 EP - 12 PB - Elsevier, New York, NY VL - 244 SN - 0019-1035, 0019-1035 KW - methods KW - impact features KW - asteroids KW - Vesta Asteroid KW - cartography KW - Rheasilvia Formation KW - global KW - mapping KW - digital terrain models KW - Dawn Mission KW - Framing Camera KW - chronology KW - coordinate systems KW - surface features KW - impact craters KW - Divalia Fossae Formation KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656038311?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Introduction%3B+the+geologic+mapping+of+Vesta&rft.au=Williams%2C+David+A%3BYingst%2C+R+Aileen%3BGarry%2C+W+Brent&rft.aulast=Williams&rft.aufirst=David&rft.date=2014-12-01&rft.volume=244&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.03.001 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 101 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-04-16 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - asteroids; cartography; chronology; coordinate systems; Dawn Mission; digital terrain models; Divalia Fossae Formation; Framing Camera; global; impact craters; impact features; mapping; methods; Rheasilvia Formation; surface features; Vesta Asteroid DO - http://dx.doi.org/10.1016/j.icarus.2014.03.001 ER - TY - JOUR T1 - The unique geomorphology and physical properties of the Vestalia Terra Plateau AN - 1656037116; 2015-013730 AB - We produced a geologic map of the Av-9 Numisia quadrangle of asteroid Vesta using Dawn spacecraft data to serve as a tool to understand the geologic relations of surface features in this region. These features include the plateau Vestalia Terra, a hill named Brumalia Tholus, and an unusual "dark ribbon" material crossing the majority of the map area. Stratigraphic relations suggest that Vestalia Terra is one of the oldest features on Vesta, despite a model crater age date similar to that of much of the surface of the asteroid. Cornelia, Numisia and Drusilla craters reveal bright and dark material in their walls, and both Cornelia and Numisia have smooth and pitted terrains on their floors suggestive of the release of volatiles during or shortly after the impacts that formed these craters. Cornelia, Fabia and Teia craters have extensive bright ejecta lobes. While diogenitic material has been identified in association with the bright Teia and Fabia ejecta, hydroxyl has been detected in the dark material within Cornelia, Numisia and Drusilla. Three large pit crater chains appear in the map area, with an orientation similar to the equatorial troughs that cut the majority of Vesta. Analysis of these features has led to several interpretations of the geological history of the region. Vestalia Terra appears to be mechanically stronger than the rest of Vesta. Brumalia Tholus may be the surface representation of a dike-fed laccolith. The dark ribbon feature is proposed to represent a long-runout ejecta flow from Drusilla crater. JF - Icarus AU - Buczkowski, Debra L AU - Wyrick, D Y AU - Toplis, M AU - Yingst, R Aileen AU - Williams, David A AU - Garry, W Brent AU - Mest, Scott C AU - Kneissl, Thomas AU - Scully, Jennifer E C AU - Nathues, Andreas AU - De Sanctis, Maria Cristina AU - Le Corre, Lucille AU - Reddy, Vishnu AU - Hoffmann, Martin AU - Ammannito, Eleonora AU - Frigeri, Alessandro AU - Tosi, Federico AU - Preusker, Frank AU - Roatsch, Thomas AU - Raymond, Carol A AU - Jaumann, Ralf AU - Pieters, Carle M AU - Russell, Christopher T Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 89 EP - 103 PB - Elsevier, New York, NY VL - 244 SN - 0019-1035, 0019-1035 KW - Teia Crater KW - stony meteorites KW - asteroids KW - Brumalia Tholus KW - Drusilla Crater KW - Dawn Mission KW - Numisia Quadrangle KW - meteorites KW - howardite KW - volcanism KW - mass movements KW - surface features KW - Vestalia Terra KW - Numisia Crater KW - pit crater chains KW - orientation KW - laccoliths KW - Vesta Asteroid KW - Fabia Crater KW - Robigalia Catena KW - diogenite KW - Cornelia Crater KW - ejecta KW - achondrites KW - Albalonga Catena KW - volatiles KW - physical properties KW - intrusions KW - geomorphology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656037116?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+unique+geomorphology+and+physical+properties+of+the+Vestalia+Terra+Plateau&rft.au=Buczkowski%2C+Debra+L%3BWyrick%2C+D+Y%3BToplis%2C+M%3BYingst%2C+R+Aileen%3BWilliams%2C+David+A%3BGarry%2C+W+Brent%3BMest%2C+Scott+C%3BKneissl%2C+Thomas%3BScully%2C+Jennifer+E+C%3BNathues%2C+Andreas%3BDe+Sanctis%2C+Maria+Cristina%3BLe+Corre%2C+Lucille%3BReddy%2C+Vishnu%3BHoffmann%2C+Martin%3BAmmannito%2C+Eleonora%3BFrigeri%2C+Alessandro%3BTosi%2C+Federico%3BPreusker%2C+Frank%3BRoatsch%2C+Thomas%3BRaymond%2C+Carol+A%3BJaumann%2C+Ralf%3BPieters%2C+Carle+M%3BRussell%2C+Christopher+T&rft.aulast=Buczkowski&rft.aufirst=Debra&rft.date=2014-12-01&rft.volume=244&rft.issue=&rft.spage=89&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.106%2Fj.icarus.2014.03.035 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 72 N1 - PubXState - NY N1 - Document feature - illus. incl. geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-02-19 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - achondrites; Albalonga Catena; asteroids; Brumalia Tholus; Cornelia Crater; Dawn Mission; diogenite; Drusilla Crater; ejecta; Fabia Crater; geomorphology; howardite; intrusions; laccoliths; mass movements; meteorites; Numisia Crater; Numisia Quadrangle; orientation; physical properties; pit crater chains; Robigalia Catena; stony meteorites; surface features; Teia Crater; Vesta Asteroid; Vestalia Terra; volatiles; volcanism DO - http://dx.doi.org/10.106/j.icarus.2014.03.035 ER - TY - JOUR T1 - The geology of the Marcia Quadrangle of asteroid Vesta; assessing the effects of large, young craters AN - 1656036651; 2015-013729 AB - We used Dawn spacecraft data to identify and delineate geological units and landforms in the Marcia quadrangle of Vesta as a means to assess the role of the large, relatively young impact craters Marcia ( approximately 63 km diam.) and Calpurnia ( approximately 53 km diam.) and their surrounding ejecta field on the local geology. We also investigated a local topographic high with a dark-rayed crater named Aricia Tholus, and the impact crater Octavia that is surrounded by a distinctive diffuse mantle. Crater counts and stratigraphic relations suggest that Marcia is the youngest large crater on Vesta, in which a putative impact melt on the crater floor ranges in age between approximately 40 and 60 Ma (depending upon choice of chronology system), and Marcia's ejecta blanket ranges in age between approximately 120 and 390 Ma (depending upon choice of chronology system). We interpret the geologic units in and around Marcia crater to mark a major vestan time-stratigraphic event, and that the Marcia Formation is one of the geologically youngest formations on Vesta. Marcia crater reveals pristine bright and dark material in its walls and smooth and pitted terrains on its floor. The smooth unit we interpret as evidence of flow of impact melts and (for the pitted terrain) release of volatiles during or after the impact process. The distinctive dark ejecta surrounding craters Marcia and Calpurnia is enriched in OH- or H-bearing phases and has a variable morphology, suggestive of a complex mixture of impact ejecta and impact melts including dark materials possibly derived from carbonaceous chondrite-rich material. Aricia Tholus, which was originally interpreted as a putative vestan volcanic edifice based on lower resolution observations, appears to be a fragment of an ancient impact basin rim topped by a dark-rayed impact crater. Octavia crater has a cratering model formation age of approximately 280-990 Ma based on counts of its ejecta field (depending upon choice of chronology system), and its ejecta field is the second oldest unit in this quadrangle. The relatively young craters and their related ejecta materials in this quadrangle are in stark contrast to the surrounding heavily cratered units that are related to the billion years old or older Rheasilvia and Veneneia impact basins and Vesta's ancient crust preserved on Vestalia Terra. JF - Icarus AU - Williams, David A AU - Denevi, Brett W AU - Mittlefehldt, David W AU - Mest, Scott C AU - Schenk, Paul M AU - Yingst, R Aileen AU - Buczkowski, Debra L AU - Scully, Jennifer E C AU - Garry, W Brent AU - McCord, Thomas B AU - Combe, Jean-Philippe AU - Jaumann, Ralf AU - Pieters, Carle M AU - Nathues, Andreas AU - Le Corre, Lucille AU - Hoffmann, Martin AU - Reddy, Vishnu AU - Schaefer, Michael AU - Roatsch, Thomas AU - Preusker, Frank AU - Marchi, Simone AU - Kneissl, Thomas AU - Schmedemann, Nico AU - Neukum, Gerhard AU - Hiesinger, Harald AU - De Sanctis, Maria Cristina AU - Ammannito, Eleonora AU - Frigeri, Alessandro AU - Prettyman, Thomas H AU - Russell, Christopher T Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 74 EP - 88 PB - Elsevier, New York, NY VL - 244 SN - 0019-1035, 0019-1035 KW - cratering KW - relative age KW - stony meteorites KW - impact features KW - asteroids KW - Dawn Mission KW - melts KW - Marcia Formation KW - meteorites KW - impact melts KW - volcanic features KW - chronology KW - ejecta blanket KW - surface features KW - Aricia Tholus KW - chondrites KW - Octavia Crater KW - water KW - Marcia Quadrangle KW - Calpurnia Crater KW - Vesta Asteroid KW - carbonaceous chondrites KW - achondrites KW - volatiles KW - eucrite KW - impact craters KW - crust KW - Marcia Crater KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036651?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+geology+of+the+Marcia+Quadrangle+of+asteroid+Vesta%3B+assessing+the+effects+of+large%2C+young+craters&rft.au=Williams%2C+David+A%3BDenevi%2C+Brett+W%3BMittlefehldt%2C+David+W%3BMest%2C+Scott+C%3BSchenk%2C+Paul+M%3BYingst%2C+R+Aileen%3BBuczkowski%2C+Debra+L%3BScully%2C+Jennifer+E+C%3BGarry%2C+W+Brent%3BMcCord%2C+Thomas+B%3BCombe%2C+Jean-Philippe%3BJaumann%2C+Ralf%3BPieters%2C+Carle+M%3BNathues%2C+Andreas%3BLe+Corre%2C+Lucille%3BHoffmann%2C+Martin%3BReddy%2C+Vishnu%3BSchaefer%2C+Michael%3BRoatsch%2C+Thomas%3BPreusker%2C+Frank%3BMarchi%2C+Simone%3BKneissl%2C+Thomas%3BSchmedemann%2C+Nico%3BNeukum%2C+Gerhard%3BHiesinger%2C+Harald%3BDe+Sanctis%2C+Maria+Cristina%3BAmmannito%2C+Eleonora%3BFrigeri%2C+Alessandro%3BPrettyman%2C+Thomas+H%3BRussell%2C+Christopher+T&rft.aulast=Williams&rft.aufirst=David&rft.date=2014-12-01&rft.volume=244&rft.issue=&rft.spage=74&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.01.033 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 37 N1 - PubXState - NY N1 - Document feature - illus. incl. geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-04-16 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - achondrites; Aricia Tholus; asteroids; Calpurnia Crater; carbonaceous chondrites; chondrites; chronology; cratering; crust; Dawn Mission; ejecta blanket; eucrite; impact craters; impact features; impact melts; Marcia Crater; Marcia Formation; Marcia Quadrangle; melts; meteorites; Octavia Crater; relative age; stony meteorites; surface features; Vesta Asteroid; volatiles; volcanic features; water DO - http://dx.doi.org/10.1016/j.icarus.2014.01.033 ER - TY - JOUR T1 - Geologic mapping of ejecta deposits in Oppia Quadrangle, Asteroid (4) Vesta AN - 1656035241; 2015-013731 AB - Oppia Quadrangle Av-10 (288-360 degrees E, + or -22 degrees ) is a junction of key geologic features that preserve a rough history of Asteroid (4) Vesta and serves as a case study of using geologic mapping to define a relative geologic timescale. Clear filter images, stereo-derived topography, slope maps, and multispectral color-ratio images from the Framing Camera on NASA's Dawn spacecraft served as basemaps to create a geologic map and investigate the spatial and temporal relationships of the local stratigraphy. Geologic mapping reveals the oldest map unit within Av-10 is the cratered highlands terrain which possibly represents original crustal material on Vesta that was then excavated by one or more impacts to form the basin Feralia Planitia. Saturnalia Fossae and Divalia Fossae ridge and trough terrains intersect the wall of Feralia Planitia indicating that this impact basin is older than both the Veneneia and Rheasilvia impact structures, representing Pre-Veneneian crustal material. Two of the youngest geologic features in Av-10 are Lepida ( approximately 45 km diameter) and Oppia ( approximately 40 km diameter) impact craters that formed on the northern and southern wall of Feralia Planitia and each cross-cuts a trough terrain. The ejecta blanket of Oppia is mapped as 'dark mantle' material because it appears dark orange in the Framing Camera 'Clementine-type' color-ratio image and has a diffuse, gradational contact distributed to the south across the rim of Rheasilvia. Mapping of surface material that appears light orange in color in the Framing Camera 'Clementine-type' color-ratio image as 'light mantle material' supports previous interpretations of an impact ejecta origin. Some light mantle deposits are easily traced to nearby source craters, but other deposits may represent distal ejecta deposits (emplaced >5 crater radii away) in a microgravity environment. JF - Icarus AU - Garry, W Brent AU - Williams, David A AU - Yingst, R Aileen AU - Mest, Scott C AU - Buczkowski, Debra L AU - Tosi, Federico AU - Schaefer, Michael AU - Le Corre, Lucille AU - Reddy, Vishnu AU - Jaumann, Ralf AU - Pieters, Carle M AU - Russell, Christopher T AU - Raymond, Carol A Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 104 EP - 119 PB - Elsevier, New York, NY VL - 244 SN - 0019-1035, 0019-1035 KW - cratering KW - imagery KW - impact features KW - asteroids KW - mapping KW - Dawn Mission KW - multispectral analysis KW - spatial distribution KW - topography KW - Feralia Planitia KW - Oppia Crater KW - Divalia Fossae Formation KW - color imagery KW - Vesta Asteroid KW - Rheasilvia Formation KW - Saturnalia Fossae Formation KW - ejecta KW - Saturnalia Fossae KW - Framing Camera KW - Divalia Fossae KW - Oppia Quadrangle KW - Lepida Crater KW - impact craters KW - temporal distribution KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656035241?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+mapping+of+ejecta+deposits+in+Oppia+Quadrangle%2C+Asteroid+%284%29+Vesta&rft.au=Garry%2C+W+Brent%3BWilliams%2C+David+A%3BYingst%2C+R+Aileen%3BMest%2C+Scott+C%3BBuczkowski%2C+Debra+L%3BTosi%2C+Federico%3BSchaefer%2C+Michael%3BLe+Corre%2C+Lucille%3BReddy%2C+Vishnu%3BJaumann%2C+Ralf%3BPieters%2C+Carle+M%3BRussell%2C+Christopher+T%3BRaymond%2C+Carol+A&rft.aulast=Garry&rft.aufirst=W&rft.date=2014-12-01&rft.volume=244&rft.issue=&rft.spage=104&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.08.046 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 55 N1 - PubXState - NY N1 - Document feature - illus. incl. geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-02-19 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - asteroids; color imagery; cratering; Dawn Mission; Divalia Fossae; Divalia Fossae Formation; ejecta; Feralia Planitia; Framing Camera; imagery; impact craters; impact features; Lepida Crater; mapping; multispectral analysis; Oppia Crater; Oppia Quadrangle; Rheasilvia Formation; Saturnalia Fossae; Saturnalia Fossae Formation; spatial distribution; temporal distribution; topography; Vesta Asteroid DO - http://dx.doi.org/10.1016/j.icarus.2014.08.046 ER - TY - JOUR T1 - Geomorphology and structural geology of Saturnalia Fossae and adjacent structures in the northern hemisphere of Vesta AN - 1656035209; 2015-013726 AB - Vesta is a unique intermediate class of rocky body in the Solar System, between terrestrial planets and small asteroids, because of its size (average radius of approximately 263 km) and differentiation, with a crust, mantle and core. Vesta's low surface gravity (0.25 m/s2) has led to the continual absence of a protective atmosphere and consequently impact cratering and impact-related processes are prevalent. Previous work has shown that the formation of the Rheasilvia impact basin induced the equatorial Divalia Fossae, whereas the formation of the Veneneia impact basin induced the northern Saturnalia Fossae. Expanding upon this earlier work, we conducted photogeologic mapping of the Saturnalia Fossae, adjacent structures and geomorphic units in two of Vesta's northern quadrangles: Caparronia and Domitia. Our work indicates that impact processes created and/or modified all mapped structures and geomorphic units. The mapped units, ordered from oldest to youngest age based mainly on cross-cutting relationships, are: (1) Vestalia Terra unit, (2) cratered highlands unit, (3) Saturnalia Fossae trough unit, (4) Saturnalia Fossae cratered unit, (5) undifferentiated ejecta unit, (6) dark lobate unit, (7) dark crater ray unit and (8) lobate crater unit. The Saturnalia Fossae consist of five separate structures: Saturnalia Fossa A is the largest (maximum width of approximately 43 km) and is interpreted as a graben, whereas Saturnalia Fossa B-E are smaller (maximum width of approximately 15 km) and are interpreted as half grabens formed by synthetic faults. Smaller, second-order structures (maximum width of <1 km) are distinguished from the Saturnalia Fossae, a first-order structure, by the use of the general descriptive term 'adjacent structures', which encompasses minor ridges, grooves and crater chains. For classification purposes, the general descriptive term 'minor ridges' characterizes ridges that are not part of the Saturnalia Fossae and are an order of magnitude smaller (maximum width of <1 km vs. maximum width of approximately 43 km). Shear deformation resulting from the large-scale (diameter of <100 km) Rheasilvia impact is proposed to form minor ridges ( approximately 2 km to approximately 25 km in length), which are interpreted as the surface expression of thrust faults, as well as grooves ( approximately 3 km to approximately 25 km in length) and pit crater chains ( approximately 1 km to approximately 25 km in length), which are interpreted as the surface expression of extension fractures and/or dilational normal faults. Secondary crater material, ejected from small-scale and medium-scale impacts (diameters of <100 km), are interpreted to form ejecta ray systems of grooves and crater chains by bouncing and scouring across the surface. Furthermore, seismic shaking, also resulting from small-scale and medium-scale impacts, is interpreted to form minor ridges because seismic shaking induces flow of regolith, which subsequently accumulates as minor ridges that are roughly parallel to the regional slope. In this work we expand upon the link between impact processes and structural features on Vesta by presenting findings of a photogeologic, structural mapping study which highlights how impact cratering and impact-related processes are expressed on this unique, intermediate Solar System body. JF - Icarus AU - Scully, Jennifer E C AU - Yin, A AU - Russell, Christopher T AU - Buczkowski, Debra L AU - Williams, David A AU - Blewett, David T AU - Ruesch, Ottaviano AU - Hiesinger, Harald AU - Le Corre, Lucille AU - Mercer, C AU - Yingst, R Aileen AU - Garry, W Brent AU - Jaumann, Ralf AU - Roatsch, Thomas AU - Preusker, Frank AU - Gaskell, Robert W AU - Schroeder, S E AU - Ammannito, Eleonora AU - Pieters, Carle M AU - Raymond, Carol A Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 23 EP - 40 PB - Elsevier, New York, NY VL - 244 SN - 0019-1035, 0019-1035 KW - cratering KW - relative age KW - asteroids KW - Rheasilvia Basin KW - mapping KW - normal faults KW - surface features KW - grooved terrains KW - Vestalia Terra KW - faults KW - pit crater chains KW - orientation KW - Vesta Asteroid KW - Veneneia Basin KW - differentiation KW - impacts KW - Saturnalia Fossae Formation KW - half grabens KW - ejecta KW - grabens KW - extension KW - Domitia Quadrangle KW - Saturnalia Fossae KW - terrains KW - Divalia Fossae KW - thrust faults KW - geomorphology KW - dilation KW - Caparronia Quadrangle KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656035209?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geomorphology+and+structural+geology+of+Saturnalia+Fossae+and+adjacent+structures+in+the+northern+hemisphere+of+Vesta&rft.au=Scully%2C+Jennifer+E+C%3BYin%2C+A%3BRussell%2C+Christopher+T%3BBuczkowski%2C+Debra+L%3BWilliams%2C+David+A%3BBlewett%2C+David+T%3BRuesch%2C+Ottaviano%3BHiesinger%2C+Harald%3BLe+Corre%2C+Lucille%3BMercer%2C+C%3BYingst%2C+R+Aileen%3BGarry%2C+W+Brent%3BJaumann%2C+Ralf%3BRoatsch%2C+Thomas%3BPreusker%2C+Frank%3BGaskell%2C+Robert+W%3BSchroeder%2C+S+E%3BAmmannito%2C+Eleonora%3BPieters%2C+Carle+M%3BRaymond%2C+Carol+A&rft.aulast=Scully&rft.aufirst=Jennifer+E&rft.date=2014-12-01&rft.volume=244&rft.issue=&rft.spage=23&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.01.013 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 53 N1 - PubXState - NY N1 - Document feature - illus. incl. sects., geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-04-16 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - asteroids; Caparronia Quadrangle; cratering; differentiation; dilation; Divalia Fossae; Domitia Quadrangle; ejecta; extension; faults; geomorphology; grabens; grooved terrains; half grabens; impacts; mapping; normal faults; orientation; pit crater chains; regolith; relative age; Rheasilvia Basin; Saturnalia Fossae; Saturnalia Fossae Formation; surface features; terrains; thrust faults; Veneneia Basin; Vesta Asteroid; Vestalia Terra DO - http://dx.doi.org/10.1016/j.icarus.2014.01.013 ER - TY - JOUR T1 - MODIS Collection 6 aerosol products: Comparison between Aqua's e-Deep Blue, Dark Target, and "merged" data sets, and usage recommendations AN - 1654682933; PQ0001053252 AB - The Moderate Resolution Imaging Spectroradiometer (MODIS) Atmospheres data product suite includes three algorithms applied to retrieve midvisible aerosol optical depth (AOD): the Enhanced Deep Blue (DB) and Dark Target (DT) algorithms over land, and a DT over-water algorithm. All three have been refined in the recent "Collection 6" (C6) MODIS reprocessing. In particular, DB has been expanded to cover vegetated land surfaces as well as brighter desert/urban areas. Additionally, a new "merged" data set which draws from all three algorithms is included in the C6 products. This study is intended to act as a point of reference for new and experienced MODIS data users with which to understand the global and regional characteristics of the C6 DB, DT, and merged data sets, based on MODIS Aqua data. This includes validation against Aerosol Robotic Network (AERONET) observations at 111 sites, focused toward regional and categorical (surface/aerosol type) analysis. Neither algorithm consistently outperforms the other, although in many cases the retrieved AOD and the level of its agreement with AERONET are very similar. In many regions the DB, DT, and merged data sets are all suitable for quantitative applications, bearing in mind that they cannot be considered independent, while in other cases one algorithm does consistently outperform the other. Usage recommendations and caveats are thus somewhat complicated and regionally dependent. Key Points * New enhanced MODIS Collection 6 aerosol data available * This study compares and validates the two over-land algorithms used * Usage recommendations are provided JF - Journal of Geophysical Research: Atmospheres AU - Sayer, A M AU - Munchak, LA AU - Hsu, N C AU - Levy, R C AU - Bettenhausen, C AU - Jeong, M-J AD - NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 13 EP - 13,989 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 119 IS - 24 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Aerosol Robotic Network (AERONET) KW - Aerosols KW - Algorithms KW - Imaging techniques KW - Satellite data KW - Deserts KW - Urban Areas KW - MODIS (Moderate Resolution Imaging Spectrometer) KW - Optical depth of aerosols KW - Q2 09243:Structure, mechanics and thermodynamics KW - M2 551.510.42:Air Pollution (551.510.42) KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1654682933?accountid=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=MODIS+Collection+6+aerosol+products%3A+Comparison+between+Aqua%27s+e-Deep+Blue%2C+Dark+Target%2C+and+%22merged%22+data+sets%2C+and+usage+recommendations&rft.au=Sayer%2C+A+M%3BMunchak%2C+LA%3BHsu%2C+N+C%3BLevy%2C+R+C%3BBettenhausen%2C+C%3BJeong%2C+M-J&rft.aulast=Sayer&rft.aufirst=A&rft.date=2014-12-01&rft.volume=119&rft.issue=24&rft.spage=13&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2014JD022453 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-02-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Aerosols; Deserts; Imaging techniques; Aerosol Robotic Network (AERONET); Satellite data; Algorithms; Optical depth of aerosols; MODIS (Moderate Resolution Imaging Spectrometer); Urban Areas DO - http://dx.doi.org/10.1002/2014JD022453 ER - TY - JOUR T1 - Analyzing source apportioned methane in northern California during Discover-AQ-CA using airborne measurements and model simulations AN - 1647014384; 21275723 AB - This study analyzes source apportioned methane (CH sub(4)) emissions and atmospheric mixing ratios in northern California during the Discover-AQ-CA field campaign using airborne measurement data and model simulations. Source apportioned CH sub(4) emissions from the Emissions Database for Global Atmospheric Research (EDGAR) version 4.2 were applied in the 3-D chemical transport model GEOS-Chem and analyzed using airborne measurements taken as part of the Alpha Jet Atmospheric eXperiment over the San Francisco Bay Area (SFBA) and northern San Joaquin Valley (SJV). During the time period of the Discover-AQ-CA field campaign EDGAR inventory CH sub(4) emissions were 5.30 Gg day super(-1) (Gg = 1.0 x 10 super(9) g) (equating to 1.90 x 10 super(3) Gg yr super(-1)) for all of California. According to EDGAR, the SFBA and northern SJV region contributes 30% of total CH sub(4) emissions from California. Source apportionment analysis during this study shows that CH sub(4) mixing ratios over this area of northern California are largely influenced by global emissions from wetlands and local/global emissions from gas and oil production and distribution, waste treatment processes, and livestock management. Model simulations, using EDGAR emissions, suggest that the model under-estimates CH sub(4) mixing ratios in northern California (average normalized mean bias (NMB) = -5.2% and linear regression slope = 0.20). The largest negative biases in the model were calculated on days when large amounts of CH sub(4) were measured over local emission sources and atmospheric CH sub(4) mixing ratios reached values >2.5 parts per million. Sensitivity emission studies conducted during this research suggest that local emissions of CH sub(4) from livestock management processes are likely the primary source of the negative model bias. These results indicate that a variety, and larger quantity, of measurement data needs to be obtained and additional research is necessary to better quantify source apportioned CH sub(4) emissions in California. JF - Atmospheric Environment AU - Johnson, Matthew S AU - Yates, Emma L AU - Iraci, Laura T AU - Loewenstein, Max AU - Tadic, Jovan M AU - Wecht, Kevin J AU - Jeong, Seongeun AU - Fischer, Marc L AD - Earth Sciences Division, NASA Ames Research Center, Moffett Field, CA, USA Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 248 EP - 256 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 99 SN - 1352-2310, 1352-2310 KW - Pollution Abstracts; Environment Abstracts; Meteorological & Geoastrophysical Abstracts KW - Methane KW - Source apportionment KW - Emission inventory KW - Livestock emissions KW - Sensitivity KW - Atmospheric pollution models KW - USA, California, San Joaquin Valley KW - Chemical transport KW - Statistical analysis KW - Simulation KW - Valleys KW - Livestock KW - Methane in the atmosphere KW - Atmospheric mixing KW - Numerical simulations KW - Emissions KW - Emission measurements KW - INE, USA, California, San Francisco Bay KW - Methane emissions KW - Mixing ratio KW - Wetlands KW - Oil and gas production KW - Atmospheric research KW - P 0000:AIR POLLUTION KW - M2 556.54:Estuaries (556.54) KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1647014384?accountid=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=Atmospheric+Environment&rft.atitle=Analyzing+source+apportioned+methane+in+northern+California+during+Discover-AQ-CA+using+airborne+measurements+and+model+simulations&rft.au=Johnson%2C+Matthew+S%3BYates%2C+Emma+L%3BIraci%2C+Laura+T%3BLoewenstein%2C+Max%3BTadic%2C+Jovan+M%3BWecht%2C+Kevin+J%3BJeong%2C+Seongeun%3BFischer%2C+Marc+L&rft.aulast=Johnson&rft.aufirst=Matthew&rft.date=2014-12-01&rft.volume=99&rft.issue=&rft.spage=248&rft.isbn=&rft.btitle=&rft.title=Atmospheric+Environment&rft.issn=13522310&rft_id=info:doi/10.1016%2Fj.atmosenv.2014.09.068 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Methane in the atmosphere; Atmospheric mixing; Atmospheric pollution models; Numerical simulations; Statistical analysis; Wetlands; Mixing ratio; Methane emissions; Atmospheric research; Sensitivity; Methane; Chemical transport; Emission measurements; Emissions; Simulation; Valleys; Oil and gas production; Livestock; USA, California, San Joaquin Valley; INE, USA, California, San Francisco Bay DO - http://dx.doi.org/10.1016/j.atmosenv.2014.09.068 ER - TY - JOUR T1 - Assimilation of Remotely Sensed Soil Moisture and Snow Depth Retrievals for Drought Estimation AN - 1642625326; 21143418 AB - The accurate knowledge of soil moisture and snow conditions is important for the skillful characterization of agricultural and hydrologic droughts, which are defined as deficits of soil moisture and streamflow, respectively. This article examines the influence of remotely sensed soil moisture and snow depth retrievals toward improving estimates of drought through data assimilation. Soil moisture and snow depth retrievals from a variety of sensors (primarily passive microwave based) are assimilated separately into the Noah land surface model for the period of 1979-2011 over the continental United States, in the North American Land Data Assimilation System (NLDAS) configuration. Overall, the assimilation of soil moisture and snow datasets was found to provide marginal improvements over the open-loop configuration. Though the improvements in soil moisture fields through soil moisture data assimilation were barely at the statistically significant levels, these small improvements were found to translate into subsequent small improvements in simulated streamflow. The assimilation of snow depth datasets were found to generally improve the snow fields, but these improvements did not always translate to corresponding improvements in streamflow, including some notable degradations observed in the western United States. A quantitative examination of the percentage drought area from root-zone soil moisture and streamflow percentiles was conducted against the U.S. Drought Monitor data. The results suggest that soil moisture assimilation provides improvements at short time scales, both in the magnitude and representation of the spatial patterns of drought estimates, whereas the impact of snow data assimilation was marginal and often disadvantageous. JF - Journal of Hydrometeorology AU - Kumar, Sujay V AU - Peters-Lidard, Christa D AU - Mocko, David AU - Reichle, Rolf AU - Liu, Yuqiong AU - Arsenault, Kristi R AU - Xia, Youlong AU - Ek, Michael AU - Riggs, George AU - Livneh, Ben AD - Science Applications International Corporation, McLean, Virginia, and Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2446 EP - 2469 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 15 IS - 6 SN - 1525-755X, 1525-755X KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Streamflow KW - Drought KW - Snow KW - Soil moisture KW - Data assimilation KW - Sensors KW - Snow cover depth KW - Remote sensing KW - Statistical analysis KW - Soil Water KW - Drought estimation KW - Hydrologic Models KW - Microwaves KW - Hydrologic Data KW - Droughts KW - Snow Depth KW - Hydrologic drought KW - Stream flow KW - USA KW - Hydrometeorological research KW - Moisture Content KW - AQ 00001:Water Resources and Supplies KW - SW 5040:Data acquisition KW - Q2 09171:Dynamics of lakes and rivers KW - M2 556.16:Runoff (556.16) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642625326?accountid=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+Hydrometeorology&rft.atitle=Assimilation+of+Remotely+Sensed+Soil+Moisture+and+Snow+Depth+Retrievals+for+Drought+Estimation&rft.au=Kumar%2C+Sujay+V%3BPeters-Lidard%2C+Christa+D%3BMocko%2C+David%3BReichle%2C+Rolf%3BLiu%2C+Yuqiong%3BArsenault%2C+Kristi+R%3BXia%2C+Youlong%3BEk%2C+Michael%3BRiggs%2C+George%3BLivneh%2C+Ben&rft.aulast=Kumar&rft.aufirst=Sujay&rft.date=2014-12-01&rft.volume=15&rft.issue=6&rft.spage=2446&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1175%2FJHM-D-13-0132.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-01 N1 - Number of references - 113 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Microwaves; Sensors; Snow; Droughts; Stream flow; Hydrometeorological research; Snow cover depth; Statistical analysis; Remote sensing; Drought; Drought estimation; Soil moisture; Data assimilation; Hydrologic drought; Hydrologic Models; Snow Depth; Streamflow; Moisture Content; Soil Water; Hydrologic Data; USA DO - http://dx.doi.org/10.1175/JHM-D-13-0132.1 ER - TY - JOUR T1 - Assessing the Impact of L-Band Observations on Drought and Flood Risk Estimation: A Decision-Theoretic Approach in an OSSE Environment AN - 1642624862; 21143429 AB - Observing system simulation experiments (OSSEs) are often conducted to evaluate the worth of existing data and data yet to be collected from proposed new missions. As missions increasingly require a broader "Earth systems" focus, it is important that the OSSEs capture the potential benefits of the observations on end-use applications. Toward this end, the results from the OSSEs must also be evaluated with a suite of metrics that capture the value, uncertainty, and information content of the observations while factoring in both science and societal impacts. This article presents a soil moisture OSSE that employs simulated L-band measurements and assesses its utility toward improving drought and flood risk estimates using the NASA Land Information System (LIS). A decision-theory-based analysis is conducted to assess the economic utility of the observations toward improving these applications. The results suggest that the improvements in surface soil moisture, root-zone soil moisture, and total runoff fields obtained through the assimilation of L-band measurements are effective in providing improvements in the drought and flood risk assessments as well. The decision-theory analysis not only demonstrates the economic utility of observations but also shows that the use of probabilistic information from the model simulations is more beneficial compared to the use of corresponding deterministic estimates. The experiment also demonstrates the value of a comprehensive modeling environment such as LIS for conducting end-to-end OSSEs by linking satellite observations, physical models, data assimilation algorithms, and end-use application models in a single integrated framework. JF - Journal of Hydrometeorology AU - Kumar, Sujay V AU - Harrison, Kenneth W AU - Peters-Lidard, Christa D AU - Santanello, Joseph A, Jr AU - Kirschbaum, Dalia AD - Science Applications International Corporation, Beltsville, and Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2140 EP - 2156 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 15 IS - 6 SN - 1525-755X, 1525-755X KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Soil moisture KW - Satellite observations KW - Data assimilation KW - Land surface model KW - Meteorological data KW - Algorithms KW - Drought KW - Soil Water KW - Utilities KW - Risks KW - Assessments KW - Floods KW - Droughts KW - Drought and floods KW - Model Studies KW - Hydrometeorology KW - Risk KW - Satellite data KW - Hydrometeorological research KW - Numerical simulations KW - Moisture Content KW - Runoff KW - Information systems KW - SW 5010:Network design KW - Q2 09161:General KW - M2 556.16:Runoff (556.16) KW - AQ 00005:Underground Services and Water Use UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642624862?accountid=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+Hydrometeorology&rft.atitle=Assessing+the+Impact+of+L-Band+Observations+on+Drought+and+Flood+Risk+Estimation%3A+A+Decision-Theoretic+Approach+in+an+OSSE+Environment&rft.au=Kumar%2C+Sujay+V%3BHarrison%2C+Kenneth+W%3BPeters-Lidard%2C+Christa+D%3BSantanello%2C+Joseph+A%2C+Jr%3BKirschbaum%2C+Dalia&rft.aulast=Kumar&rft.aufirst=Sujay&rft.date=2014-12-01&rft.volume=15&rft.issue=6&rft.spage=2140&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1175%2FJHM-D-13-0204.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-01 N1 - Number of references - 73 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Floods; Droughts; Runoff; Risks; Information systems; Meteorological data; Hydrometeorological research; Satellite data; Numerical simulations; Algorithms; Soil moisture; Data assimilation; Drought and floods; Hydrometeorology; Risk; Assessments; Moisture Content; Soil Water; Drought; Utilities; Model Studies DO - http://dx.doi.org/10.1175/JHM-D-13-0204.1 ER - TY - JOUR T1 - Estimation of land surface temperature from atmospherically corrected LANDSAT TM image using 6S and NCEP global reanalysis product AN - 1642619758; 21110215 AB - Water vapour is the most variable constituent in the atmosphere which is responsible for serious noise in the optical satellite images. This research is focused on the vertical distribution of water vapour and deducing its possible effects on the atmospheric correction process. The vertical distribution of precipitable water vapour, water vapour mixing ratio with geopotential height and pressure were estimated through the weather research and forecasting (WRF) model by downscaling the National Center for Environmental Prediction (NCEP) global reanalysis product. In addition, the most widely used LANDSAT TM satellite image has been used for this assessment. The WRF model was applied with three domains centred on a LANDSAT captured image over the area. The 6S atmospheric correction code was utilised for viewing the effect of precipitable water vapour on satellite image correction. The analysis was conducted on two pressure levels (1,000 and 100 hPa) representing the troposphere and stratosphere, respectively. The validation of the atmospheric correction has been performed by estimating the land surface temperature (LST) over the Walnut Creek region and its comparison with the Soil Moisture Experiments in 2002 (SMEX02) LST field validation datasets. The overall analyses indicate a higher accuracy of LST repossession with 100 hPa corrected image. JF - Environmental Earth Sciences AU - Srivastava, Prashant K AU - Han, Dawei AU - Rico-Ramirez, Miguel A AU - Bray, Michaela AU - Islam, Tanvir AU - Gupta, Manika AU - Dai, Qiang AD - Hydrological Sciences, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA, prashant.k.srivastava@nasa.gov Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 5183 EP - 5196 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 72 IS - 12 SN - 1866-6280, 1866-6280 KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts; Environment Abstracts KW - Prediction KW - Surface temperatures KW - Acoustic waves KW - Remote sensing KW - LANDSAT KW - Atmosphere KW - Data reanalysis KW - USA, Iowa, Ames, Walnut Creek KW - Vapors KW - Mixing ratio KW - Noise pollution KW - Weather KW - Temperature KW - Noise levels KW - Troposphere KW - Juglans KW - Satellites KW - Stratosphere KW - Landsat KW - Precipitable water KW - Geopotential field analysis KW - Satellite image correction KW - Soil moisture KW - P 0000:AIR POLLUTION KW - M2 556.14:Infiltration/Soil Moisture (556.14) KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642619758?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Earth+Sciences&rft.atitle=Estimation+of+land+surface+temperature+from+atmospherically+corrected+LANDSAT+TM+image+using+6S+and+NCEP+global+reanalysis+product&rft.au=Srivastava%2C+Prashant+K%3BHan%2C+Dawei%3BRico-Ramirez%2C+Miguel+A%3BBray%2C+Michaela%3BIslam%2C+Tanvir%3BGupta%2C+Manika%3BDai%2C+Qiang&rft.aulast=Srivastava&rft.aufirst=Prashant&rft.date=2014-12-01&rft.volume=72&rft.issue=12&rft.spage=5183&rft.isbn=&rft.btitle=&rft.title=Environmental+Earth+Sciences&rft.issn=18666280&rft_id=info:doi/10.1007%2Fs12665-014-3388-1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-01 N1 - Number of references - 56 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Surface temperatures; Geopotential field analysis; Precipitable water; Acoustic waves; Satellite image correction; Mixing ratio; LANDSAT; Noise pollution; Soil moisture; Stratosphere; Data reanalysis; Prediction; Weather; Landsat; Vapors; Noise levels; Temperature; Remote sensing; Troposphere; Atmosphere; Satellites; Juglans; USA, Iowa, Ames, Walnut Creek DO - http://dx.doi.org/10.1007/s12665-014-3388-1 ER - TY - JOUR T1 - Water Balance in the Amazon Basin from a Land Surface Model Ensemble AN - 1642612375; 21143441 AB - Despite recent advances in land surface modeling and remote sensing, estimates of the global water budget are still fairly uncertain. This study aims to evaluate the water budget of the Amazon basin based on several state-of-the-art land surface model (LSM) outputs. Water budget variables (terrestrial water storage TWS, evapotranspiration ET, surface runoff R, and base flow B) are evaluated at the basin scale using both remote sensing and in situ data. Meteorological forcings at a 3-hourly time step and 1 degree spatial resolution were used to run 14 LSMs. Precipitation datasets that have been rescaled to match monthly Global Precipitation Climatology Project (GPCP) and Global Precipitation Climatology Centre (GPCC) datasets and the daily Hydrologie du Bassin de l'Amazone (HYBAM) dataset were used to perform three experiments. The Hydrological Modeling and Analysis Platform (HyMAP) river routing scheme was forced with R and B and simulated discharges are compared against observations at 165 gauges. Simulated ET and TWS are compared against FLUXNET and MOD16A2 evapotranspiration datasets and Gravity Recovery and Climate Experiment (GRACE) TWS estimates in two subcatchments of main tributaries (Madeira and Negro Rivers). At the basin scale, simulated ET ranges from 2.39 to 3.26 mm day super(-1) and a low spatial correlation between ET and precipitation indicates that evapotranspiration does not depend on water availability over most of the basin. Results also show that other simulated water budget components vary significantly as a function of both the LSM and precipitation dataset, but simulated TWS generally agrees with GRACE estimates at the basin scale. The best water budget simulations resulted from experiments using HYBAM, mostly explained by a denser rainfall gauge network and the rescaling at a finer temporal scale. JF - Journal of Hydrometeorology AU - Getirana, Augusto C AU - Dutra, Emanuel AU - Guimberteau, Matthieu AU - Kam, Jonghun AU - Li, Hong-Yi AU - Decharme, Bertrand AU - Zhang, Zhengqiu AU - Ducharne, Agnes AU - Boone, Aaron AU - Balsamo, Gianpaolo AD - Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2586 EP - 2614 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 15 IS - 6 SN - 1525-755X, 1525-755X KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Amazon region KW - Runoff KW - Hydrologic models KW - Land surface model KW - Remote Sensing KW - Water budget KW - Remote sensing KW - Hydrologic Budget KW - Hydrologic Models KW - Surface runoff KW - Climatology KW - Tributaries KW - Rivers KW - Rain gauge networks KW - Hydrologic analysis KW - Climate KW - Available Water KW - Water storage KW - Global precipitation KW - Evapotranspiration KW - Routing KW - Precipitation KW - Water balance KW - Hydrometeorological research KW - Numerical simulations KW - South America, Amazon R. KW - Atmospheric forcing KW - Climate and hydrology KW - Argentina, Negro R. KW - ASE, Atlantic, Madeira KW - M2 556:General (556) KW - SW 5040:Data acquisition KW - AQ 00005:Underground Services and Water Use KW - Q2 09146:TSD distribution, water masses and circulation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642612375?accountid=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+Hydrometeorology&rft.atitle=Water+Balance+in+the+Amazon+Basin+from+a+Land+Surface+Model+Ensemble&rft.au=Getirana%2C+Augusto+C%3BDutra%2C+Emanuel%3BGuimberteau%2C+Matthieu%3BKam%2C+Jonghun%3BLi%2C+Hong-Yi%3BDecharme%2C+Bertrand%3BZhang%2C+Zhengqiu%3BDucharne%2C+Agnes%3BBoone%2C+Aaron%3BBalsamo%2C+Gianpaolo&rft.aulast=Getirana&rft.aufirst=Augusto&rft.date=2014-12-01&rft.volume=15&rft.issue=6&rft.spage=2586&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1175%2FJHM-D-14-0068.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-01 N1 - Number of references - 103 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Water balance; Water budget; Climate; Atmospheric forcing; Remote sensing; Climatology; Evapotranspiration; Tributaries; Runoff; Rain gauge networks; Hydrologic analysis; Global precipitation; Water storage; Precipitation; Hydrometeorological research; Numerical simulations; Surface runoff; Climate and hydrology; Rivers; Remote Sensing; Hydrologic Models; Available Water; Hydrologic Budget; Routing; South America, Amazon R.; Argentina, Negro R.; ASE, Atlantic, Madeira DO - http://dx.doi.org/10.1175/JHM-D-14-0068.1 ER - TY - JOUR T1 - Comparison of the stress-stimulated current of dry and fluid-saturated gabbro samples AN - 1641011589; 2015-002536 AB - We investigate charge generation as a function of stress in fine-grained gabbro for both nominally dry samples and samples fully saturated with electrically conductive brine fluids similar to those observed in active earthquake fault zones. These experiments address a number of proposed and reported electrical precursory and coseismic phenomena associated with earthquakes. Compressive load was applied to one end of the sample in repetitive cycles using a pair of precision steel platens driven by a large hydraulic press. The samples were tested by cycling between constant low stress and constant high stress values with a 200-s periodicity. Net charge transport between the stressed and unstressed sample ends was monitored with a picoammeter. For the nominally dry samples, stress-stimulated current (SSC) transients on the order of 50-400 pA peak-to-peak were observed with a decay time constant approximately 10 s during stress loading and unloading. Under constant compressive loads of approximately 22 MPa, small negative polarity SSC of approximately 15 pA magnitude was observed as an offset from the baseline current at low load (5 MPa) conditions. For the fluid-saturated samples, neither transients nor SSCs were observed as a function of stress when the load was cycled, an observation that is consistent with more rapid internal self-discharge due to higher electrical conductivity of the sample. Because the Earth"s crust is fluid saturated, observation of significant electrical charge buildup is not expected during the observed slow stress accumulation prior to earthquakes or during any slow precursory stress release that may occur in the region of earthquake nucleation. However, observation of coseismic charge generation due to electrokinetic, triboelectric, and other processes may occur during earthquake stress drops, surface rupture, and seismic-wave arrivals from dynamic rupture. JF - Bulletin of the Seismological Society of America AU - Dahlgren, Robert P AU - Johnston, Malcolm J S AU - Vanderbilt, Vern C AU - Nakaba, Rebecca N Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2662 EP - 2672 PB - Seismological Society of America, Berkeley, CA VL - 104 IS - 6 SN - 0037-1106, 0037-1106 KW - experimental studies KW - loading KW - igneous rocks KW - stress KW - simulation KW - seismic response KW - plutonic rocks KW - seismicity KW - saturation KW - pore pressure KW - gabbros KW - compression KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011589?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Comparison+of+the+stress-stimulated+current+of+dry+and+fluid-saturated+gabbro+samples&rft.au=Dahlgren%2C+Robert+P%3BJohnston%2C+Malcolm+J+S%3BVanderbilt%2C+Vern+C%3BNakaba%2C+Rebecca+N&rft.aulast=Dahlgren&rft.aufirst=Robert&rft.date=2014-12-01&rft.volume=104&rft.issue=6&rft.spage=2662&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120140144 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 - 50 N1 - PubXState - CA N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-12-31 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - compression; earthquakes; experimental studies; gabbros; igneous rocks; loading; plutonic rocks; pore pressure; saturation; seismic response; seismicity; simulation; stress DO - http://dx.doi.org/10.1785/0120140144 ER - TY - JOUR T1 - Extra-tropical atmospheric response to ENSO in the CMIP5 models AN - 1627973887; 20970894 AB - The seasonal mean extra-tropical atmospheric response to El Nino/Southern Oscillation (ENSO) is assessed in the historical and pre-industrial control CMIP5 simulations. This analysis considers two types of El Nino events, characterized by positive sea surface temperature (SST) anomalies in either the central equatorial Pacific (CP) or eastern equatorial Pacific (EP), as well as EP and CP La Nina events, characterized by negative SST anomalies in the same two regions. Seasonal mean geopotential height anomalies in key regions typify the magnitude and structure of the disruption of the Walker circulation cell in the tropical Pacific, upper tropospheric ENSO teleconnections and the polar stratospheric response. In the CMIP5 ensembles, the magnitude of the Walker cell disruption is correlated with the strength of the mid-latitude responses in the upper troposphere i.e., the North Pacific and South Pacific lows strengthen during El Nino events. The simulated responses to El Nino and La Nina have opposite sign. The seasonal mean extra-tropical, upper tropospheric responses to EP and CP events are indistinguishable. The ENSO responses in the MERRA reanalysis lie within the model scatter of the historical simulations. Similar responses are simulated in the pre-industrial and historical CMIP5 simulations. Overall, there is a weak correlation between the strength of the tropical response to ENSO and the strength of the polar stratospheric response. ENSO-related polar stratospheric variability is best simulated in the "high-top" subset of models with a well-resolved stratosphere. JF - Climate Dynamics AU - Hurwitz, Margaret M AU - Calvo, Natalia AU - Garfinkel, Chaim I AU - Butler, Amy H AU - Ineson, Sarah AU - Cagnazzo, Chiara AU - Manzini, Elisa AU - Pena-Ortiz, Cristina AD - Goddard Earth Sciences Technology and Research (GESTAR), Morgan State University, Baltimore, MD, USA, margaret.m.hurwitz@nasa.gov Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 3367 EP - 3376 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 43 IS - 12 SN - 0930-7575, 0930-7575 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Variability KW - IS, South Pacific KW - La Nina KW - IS, Tropical Pacific KW - Data reanalysis KW - Sea surface temperature anomalies KW - IN, North Pacific KW - El Nino events KW - El Nino KW - IS, Equatorial Pacific KW - Ocean-atmosphere system KW - Walker circulation KW - Sea surface temperatures KW - El Nino phenomena KW - Teleconnections KW - Modelling KW - Marine KW - Climate models KW - Climates KW - Temperature KW - Troposphere KW - Stratosphere KW - Model Studies KW - Southern Oscillation KW - Dynamic height KW - Strength KW - Numerical simulations KW - Geopotential field analysis KW - El Nino-Southern Oscillation event KW - SW 0810:General KW - M2 551.588:Environmental Influences (551.588) KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627973887?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+Dynamics&rft.atitle=Extra-tropical+atmospheric+response+to+ENSO+in+the+CMIP5+models&rft.au=Hurwitz%2C+Margaret+M%3BCalvo%2C+Natalia%3BGarfinkel%2C+Chaim+I%3BButler%2C+Amy+H%3BIneson%2C+Sarah%3BCagnazzo%2C+Chiara%3BManzini%2C+Elisa%3BPena-Ortiz%2C+Cristina&rft.aulast=Hurwitz&rft.aufirst=Margaret&rft.date=2014-12-01&rft.volume=43&rft.issue=12&rft.spage=3367&rft.isbn=&rft.btitle=&rft.title=Climate+Dynamics&rft.issn=09307575&rft_id=info:doi/10.1007%2Fs00382-014-2110-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Number of references - 34 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - El Nino; Ocean-atmosphere system; Troposphere; Stratosphere; Modelling; Dynamic height; Teleconnections; El Nino phenomena; Southern Oscillation; Climate models; La Nina; Data reanalysis; Sea surface temperature anomalies; Numerical simulations; El Nino events; Geopotential field analysis; El Nino-Southern Oscillation event; Sea surface temperatures; Walker circulation; Variability; Strength; Climates; Temperature; Model Studies; IS, South Pacific; IN, North Pacific; IS, Equatorial Pacific; IS, Tropical Pacific; Marine DO - http://dx.doi.org/10.1007/s00382-014-2110-z ER - TY - JOUR T1 - Assessment of SMOS soil moisture retrieval parameters using tau-omega algorithms for soil moisture deficit estimation AN - 1707521079; 2015-083582 AB - Soil Moisture and Ocean Salinity (SMOS) is the latest mission which provides flow of coarse resolution soil moisture data for land applications. However, the efficient retrieval of soil moisture for hydrological applications depends on optimally choosing the soil and vegetation parameters. The first stage of this work involves the evaluation of SMOS Level 2 products and then several approaches for soil moisture retrieval from SMOS brightness temperature are performed to estimate Soil Moisture Deficit (SMD). The most widely applied algorithm i.e. Single channel algorithm (SCA), based on tau -omega is used in this study for the soil moisture retrieval. In tau -omega , the soil moisture is retrieved using the Horizontal (H) polarisation following Hallikainen dielectric model, roughness parameters, Fresnel's equation and estimated Vegetation Optical Depth (tau ). The roughness parameters are empirically calibrated using the numerical optimization techniques. Further to explore the improvement in retrieval models, modifications have been incorporated in the algorithms with respect to the sources of the parameters, which include effective temperatures derived from the European Center for Medium-Range Weather Forecasts (ECMWF) downscaled using the Weather Research and Forecasting (WRF)-NOAH Land Surface Model and Moderate Resolution Imaging Spectroradiometer (MODIS) land surface temperature (LST) while the tau is derived from MODIS Leaf Area Index (LAI). All the evaluations are performed against SMD, which is estimated using the Probability Distributed Model following a careful calibration and validation integrated with sensitivity and uncertainty analysis. The performance obtained after all those changes indicate that SCA-H using WRF-NOAH LSM downscaled ECMWF LST produces an improved performance for SMD estimation at a catchment scale. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Hydrology AU - Srivastava, Prashant K AU - Han, Dawei AU - Rico Ramirez, Miguel A AU - O'Neill, Peggy AU - Islam, Tanvir AU - Gupta, Manika Y1 - 2014/11/27/ PY - 2014 DA - 2014 Nov 27 SP - 574 EP - 587 PB - Elsevier, Amsterdam VL - 519 IS - Part A SN - 0022-1694, 0022-1694 KW - gauging KW - Fresnel equation KW - moisture KW - rivers and streams KW - England KW - Europe KW - WRF-NOAH model KW - Great Britain KW - temperature KW - Soil Moisture and Ocean Salinity KW - ground water KW - brightness KW - drainage basins KW - probability KW - Brue Basin KW - algorithms KW - soils KW - SMOS KW - Western Europe KW - statistical analysis KW - equations KW - land surface model KW - United Kingdom KW - southwestern England KW - mathematical methods KW - Lovington England KW - tau-omega algorithm KW - remote sensing KW - MODIS KW - 21:Hydrogeology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707521079?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Assessment+of+SMOS+soil+moisture+retrieval+parameters+using+tau-omega+algorithms+for+soil+moisture+deficit+estimation&rft.au=Srivastava%2C+Prashant+K%3BHan%2C+Dawei%3BRico+Ramirez%2C+Miguel+A%3BO%27Neill%2C+Peggy%3BIslam%2C+Tanvir%3BGupta%2C+Manika&rft.aulast=Srivastava&rft.aufirst=Prashant&rft.date=2014-11-27&rft.volume=519&rft.issue=Part+A&rft.spage=574&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2014.07.056 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 - 78 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2015-11-19 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - algorithms; brightness; Brue Basin; drainage basins; England; equations; Europe; Fresnel equation; gauging; Great Britain; ground water; land surface model; Lovington England; mathematical methods; MODIS; moisture; probability; remote sensing; rivers and streams; SMOS; Soil Moisture and Ocean Salinity; soils; southwestern England; statistical analysis; tau-omega algorithm; temperature; United Kingdom; Western Europe; WRF-NOAH model DO - http://dx.doi.org/10.1016/j.jhydrol.2014.07.056 ER - TY - JOUR T1 - An integrated modeling system for estimating glacier- and snowmelt-driven streamflow from remote sensing and earth system data products in the Himalayas AN - 1700095569; 2015-072844 AB - Quantification of the contribution of the hydrologic components (snow, ice and rain) to river discharge in the Hindu Kush Himalayan (HKH) region is important for decision-making in water sensitive sectors, and for water resources management and flood risk reduction. In this area, access to and monitoring of the glaciers and their melt outflow is challenging due to difficult access, thus modeling based on remote sensing offers the potential for providing information to improve water resources management and decision making. This paper describes an integrated modeling system developed using downscaled NASA satellite based and earth system data products coupled with in-situ hydrologic data to assess the contribution of snow and glaciers to the flows of the rivers in the HKH region. Snow and glacier melt was estimated using the Utah Energy Balance (UEB) model, further enhanced to accommodate glacier ice melt over clean and debris-covered tongues, then meltwater was input into the USGS Geospatial Stream Flow Model (GeoSFM). The two model components were integrated into Better Assessment Science Integrating point and Nonpoint Sources modeling framework (BASINS) as a user-friendly open source system and was made available to countries in high Asia. Here we present a case study from the Langtang Khola watershed in the monsoon-influenced Nepal Himalaya, used to validate our energy balance approach and to test the applicability of our modeling system. The snow and glacier melt model predicts that for the eight years used for model evaluation (October 2003-September 2010), the total surface water input over the basin was 9.43 m, originating as 62% from glacier melt, 30% from snowmelt and 8% from rainfall. Measured streamflow for those years were 5.02 m, reflecting a runoff coefficient of 0.53. GeoSFM simulated streamflow was 5.31 m indicating reasonable correspondence between measured and model confirming the capability of the integrated system to provide a quantification of water availability. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Hydrology AU - Brown, M E AU - Racoviteanu, A E AU - Tarboton, D G AU - Gupta, A Sen AU - Nigro, J AU - Policelli, F AU - Habib, S AU - Tokay, M AU - Shrestha, M S AU - Bajracharya, S AU - Hummel, P AU - Gray, M AU - Duda, P AU - Zaitchik, B AU - Mahat, V AU - Artan, G AU - Tokar, S Y1 - 2014/11/27/ PY - 2014 DA - 2014 Nov 27 SP - 1859 EP - 1869 PB - Elsevier, Amsterdam VL - 519 IS - Part B SN - 0022-1694, 0022-1694 KW - GEOSFM model KW - land cover KW - rivers and streams KW - Manas Basin KW - vegetation KW - digital terrain models KW - simulation KW - energy balance KW - Nepal KW - topography KW - Earth Observing System KW - Indian Peninsula KW - BASINS model KW - drainage basins KW - Himalayas KW - ASTER instrument KW - Asia KW - north-central Nepal KW - climate KW - Narayani Basin KW - Better Assessment Science Integrating Point and Nonpoint Sources KW - Shuttle Imaging Radar KW - surface water KW - Jhelum Basin KW - Hindu Kush KW - radar methods KW - glaciers KW - satellite methods KW - Langtang Khola Basin KW - UEBGrid model KW - models KW - streamflow KW - Utah energy balance model KW - remote sensing KW - MODIS KW - meltwater KW - 21:Hydrogeology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700095569?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology&rft.atitle=An+integrated+modeling+system+for+estimating+glacier-+and+snowmelt-driven+streamflow+from+remote+sensing+and+earth+system+data+products+in+the+Himalayas&rft.au=Brown%2C+M+E%3BRacoviteanu%2C+A+E%3BTarboton%2C+D+G%3BGupta%2C+A+Sen%3BNigro%2C+J%3BPolicelli%2C+F%3BHabib%2C+S%3BTokay%2C+M%3BShrestha%2C+M+S%3BBajracharya%2C+S%3BHummel%2C+P%3BGray%2C+M%3BDuda%2C+P%3BZaitchik%2C+B%3BMahat%2C+V%3BArtan%2C+G%3BTokar%2C+S&rft.aulast=Brown&rft.aufirst=M&rft.date=2014-11-27&rft.volume=519&rft.issue=Part+B&rft.spage=1859&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2014.09.050 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 - 70 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2015-11-19 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - Asia; ASTER instrument; Better Assessment Science Integrating Point and Nonpoint Sources; climate; digital terrain models; drainage basins; Earth Observing System; energy balance; GEOSFM model; glaciers; Himalayas; Hindu Kush; Indian Peninsula; Jhelum Basin; land cover; Langtang Khola Basin; Manas Basin; meltwater; models; MODIS; Narayani Basin; Nepal; north-central Nepal; radar methods; remote sensing; rivers and streams; satellite methods; Shuttle Imaging Radar; simulation; streamflow; surface water; topography; UEBGrid model; Utah energy balance model; vegetation; BASINS model DO - http://dx.doi.org/10.1016/j.jhydrol.2014.09.050 ER - TY - NEWS T1 - Pluto's Exotic Chemistry AN - 1627776854 JF - UPI Space Daily AU - Reggie Hudson - NASA Research Scientist Y1 - 2014/11/25/ PY - 2014 DA - 2014 Nov 25 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627776854?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Pluto%27s+Exotic+Chemistry&rft.au=Reggie+Hudson+-+NASA+Research+Scientist&rft.aulast=Reggie+Hudson+-+NASA+Research+Scientist&rft.aufirst=&rft.date=2014-11-25&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-11-25 ER - TY - CPAPER T1 - Mechanical and Thermal Properties of Cross-Linked Phenolic Resins Using Molecular Dynamics T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627973552; 6312120 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Lawson, John AU - Monk, Joshua AU - Haskins, Justin AU - Bauschlicher Jr, Charles Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Resins KW - phenolic compounds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627973552?accountid=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=Mechanical+and+Thermal+Properties+of+Cross-Linked+Phenolic+Resins+Using+Molecular+Dynamics&rft.au=Lawson%2C+John%3BMonk%2C+Joshua%3BHaskins%2C+Justin%3BBauschlicher+Jr%2C+Charles&rft.aulast=Lawson&rft.aufirst=John&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2014/webprogram/meeting2014-11-16.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-31 N1 - Last updated - 2014-11-26 ER - TY - CPAPER T1 - Modeling the Formation and Function of Responsive Peptide Systems T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627964228; 6310576 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Hsieh, Ming-Chien AU - Chen, Chenrui AU - Tan, Junjun AU - Omosun, Tolu AU - Mehta, Anil AU - Lynn, David AU - Grover, Martha Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Peptides UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627964228?accountid=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=Modeling+the+Formation+and+Function+of+Responsive+Peptide+Systems&rft.au=Hsieh%2C+Ming-Chien%3BChen%2C+Chenrui%3BTan%2C+Junjun%3BOmosun%2C+Tolu%3BMehta%2C+Anil%3BLynn%2C+David%3BGrover%2C+Martha&rft.aulast=Hsieh&rft.aufirst=Ming-Chien&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2014/webprogram/meeting2014-11-16.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-31 N1 - Last updated - 2014-11-26 ER - TY - CPAPER T1 - Investigation of Structure and Transport in Li-Doped Ionic Liquid Electrolytes: [pyr14][Tfsi], [pyr13][Fsi], and [EMIM][BF4] T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627959081; 6308686 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Haskins, Justin AU - Bennett, William AU - Wu, James AU - Hernandez, Dionne AU - Borodin, Oleg AU - Monk, Joshua AU - Bauschlicher Jr, Charles AU - Lawson, John Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Electrolytes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627959081?accountid=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=Investigation+of+Structure+and+Transport+in+Li-Doped+Ionic+Liquid+Electrolytes%3A+%5Bpyr14%5D%5BTfsi%5D%2C+%5Bpyr13%5D%5BFsi%5D%2C+and+%5BEMIM%5D%5BBF4%5D&rft.au=Haskins%2C+Justin%3BBennett%2C+William%3BWu%2C+James%3BHernandez%2C+Dionne%3BBorodin%2C+Oleg%3BMonk%2C+Joshua%3BBauschlicher+Jr%2C+Charles%3BLawson%2C+John&rft.aulast=Haskins&rft.aufirst=Justin&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 - Illumination conditions at the lunar south pole using high resolution digital terrain models from LOLA AN - 1696877949; 2015-069056 JF - Icarus AU - Glaeser, Philipp AU - Scholten, F AU - De Rosa, D AU - Figuera, R Marco AU - Oberst, J AU - Mazarico, E AU - Neumann, G A AU - Robinson, Mark S Y1 - 2014/11/15/ PY - 2014 DA - 2014 Nov 15 SP - 78 EP - 90 PB - Elsevier, New York, NY VL - 243 SN - 0019-1035, 0019-1035 KW - Lunar Orbiter Laser Altimeter KW - surface properties KW - polar regions KW - Moon KW - slopes KW - Shackleton Crater KW - de Gerlache Crater KW - mapping KW - precession KW - landing sites KW - digital terrain models KW - simulation KW - topography KW - Shackleton Rim KW - permanently shadowed regions KW - solar illumination KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877949?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Illumination+conditions+at+the+lunar+south+pole+using+high+resolution+digital+terrain+models+from+LOLA&rft.au=Glaeser%2C+Philipp%3BScholten%2C+F%3BDe+Rosa%2C+D%3BFiguera%2C+R+Marco%3BOberst%2C+J%3BMazarico%2C+E%3BNeumann%2C+G+A%3BRobinson%2C+Mark+S&rft.aulast=Glaeser&rft.aufirst=Philipp&rft.date=2014-11-15&rft.volume=243&rft.issue=&rft.spage=78&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.08.013 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 25 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2015-07-17 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - de Gerlache Crater; digital terrain models; landing sites; Lunar Orbiter Laser Altimeter; mapping; Moon; permanently shadowed regions; polar regions; precession; Shackleton Crater; Shackleton Rim; simulation; slopes; solar illumination; surface properties; topography DO - http://dx.doi.org/10.1016/j.icarus.2014.08.013 ER - TY - JOUR T1 - The Miniature Radio Frequency Instrument's (Mini-RF) global observations of Earth's Moon AN - 1696877321; 2015-069063 JF - Icarus AU - Cahill, Joshua T S AU - Thomson, B J AU - Patterson, G Wesley AU - Bussey, D Benjamin J AU - Neish, Catherine D AU - Lopez, Norberto R AU - Turner, F Scott AU - Aldridge, T AU - McAdam, M AU - Meyer, H M AU - Raney, R K AU - Carter, L M AU - Spudis, P D AU - Hiesinger, H AU - Pasckert, J H Y1 - 2014/11/15/ PY - 2014 DA - 2014 Nov 15 SP - 173 EP - 190 PB - Elsevier, New York, NY VL - 243 SN - 0019-1035, 0019-1035 KW - Nearside Radar Dark Terrane KW - Procellarum KREEP terrane KW - Miniature Radio Frequency Instrument KW - Moon KW - Lunar Reconnaissance Orbiter KW - Mare Orientale KW - roughness KW - Lunar Prospector Program KW - radar methods KW - Mini-RF KW - Orientale Impact Basin Terrane KW - mapping KW - terranes KW - lunar highlands KW - depth KW - South Pole-Aitken Basin KW - Feldspathic Highlands Terrane KW - physical properties KW - KREEP KW - Clementine Program KW - orbital observations KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877321?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+Miniature+Radio+Frequency+Instrument%27s+%28Mini-RF%29+global+observations+of+Earth%27s+Moon&rft.au=Cahill%2C+Joshua+T+S%3BThomson%2C+B+J%3BPatterson%2C+G+Wesley%3BBussey%2C+D+Benjamin+J%3BNeish%2C+Catherine+D%3BLopez%2C+Norberto+R%3BTurner%2C+F+Scott%3BAldridge%2C+T%3BMcAdam%2C+M%3BMeyer%2C+H+M%3BRaney%2C+R+K%3BCarter%2C+L+M%3BSpudis%2C+P+D%3BHiesinger%2C+H%3BPasckert%2C+J+H&rft.aulast=Cahill&rft.aufirst=Joshua+T&rft.date=2014-11-15&rft.volume=243&rft.issue=&rft.spage=173&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.07.018 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 67 N1 - PubXState - NY N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2015-07-17 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - Clementine Program; depth; Feldspathic Highlands Terrane; KREEP; lunar highlands; Lunar Prospector Program; Lunar Reconnaissance Orbiter; mapping; Mare Orientale; Mini-RF; Miniature Radio Frequency Instrument; Moon; Nearside Radar Dark Terrane; orbital observations; Orientale Impact Basin Terrane; physical properties; Procellarum KREEP terrane; radar methods; roughness; South Pole-Aitken Basin; terranes DO - http://dx.doi.org/10.1016/j.icarus.2014.07.018 ER - TY - JOUR T1 - Comparative estimates of the heat generated by ocean tides on icy satellites in the outer solar system AN - 1696877022; 2015-069073 JF - Icarus AU - Tyler, Robert Y1 - 2014/11/15/ PY - 2014 DA - 2014 Nov 15 SP - 358 EP - 385 PB - Elsevier, New York, NY VL - 243 SN - 0019-1035, 0019-1035 KW - solar system KW - icy satellites KW - ocean circulation KW - obliquity of the ecliptic KW - Europa Satellite KW - outer solar system KW - Ganymede Satellite KW - Io Satellite KW - ice cover KW - Galilean satellites KW - freezing KW - eccentricity KW - tides KW - ocean basins KW - resonance KW - Callisto Satellite KW - dynamics KW - Titan Satellite KW - heating KW - Enceladus Satellite KW - satellites KW - Mimas Satellite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877022?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Comparative+estimates+of+the+heat+generated+by+ocean+tides+on+icy+satellites+in+the+outer+solar+system&rft.au=Tyler%2C+Robert&rft.aulast=Tyler&rft.aufirst=Robert&rft.date=2014-11-15&rft.volume=243&rft.issue=&rft.spage=358&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.08.037 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 59 N1 - PubXState - NY N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-11-19 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - Callisto Satellite; dynamics; eccentricity; Enceladus Satellite; Europa Satellite; freezing; Galilean satellites; Ganymede Satellite; heating; ice cover; icy satellites; Io Satellite; Mimas Satellite; obliquity of the ecliptic; ocean circulation; ocean basins; outer solar system; resonance; satellites; solar system; tides; Titan Satellite DO - http://dx.doi.org/10.1016/j.icarus.2014.08.037 ER - TY - JOUR T1 - Initial results from radio occultation measurements with the Mars Reconnaissance Orbiter; a nocturnal mixed layer in the tropics and comparisons with polar profiles from the Mars Climate Sounder AN - 1696876701; 2015-069057 JF - Icarus AU - Hinson, David P AU - Asmar, Sami W AU - Kahan, Daniel S AU - Akopian, Varoujan AU - Haberle, Robert M AU - Spiga, Aymeric AU - Schofield, John T AU - Kleinboehl, Armin AU - Abdou, Wedad A AU - Lewis, Stephen R AU - Paik, Meegyeong AU - Maalouf, Sami G Y1 - 2014/11/15/ PY - 2014 DA - 2014 Nov 15 SP - 91 EP - 103 PB - Elsevier, New York, NY VL - 243 SN - 0019-1035, 0019-1035 KW - altitude KW - Mars KW - simulation KW - temperature KW - ice caps KW - Gale Crater KW - carbon dioxide KW - occultation KW - ice KW - radio-wave methods KW - orbital observations KW - diurnal variations KW - climate KW - clouds KW - general circulation models KW - numerical models KW - cyclic processes KW - Mars Climate Sounder KW - atmosphere KW - Mars Reconnaissance Orbiter KW - terrestrial planets KW - planets KW - eddies KW - atmospheric pressure KW - aerosols KW - seasonal variations KW - Tharsis KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696876701?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Initial+results+from+radio+occultation+measurements+with+the+Mars+Reconnaissance+Orbiter%3B+a+nocturnal+mixed+layer+in+the+tropics+and+comparisons+with+polar+profiles+from+the+Mars+Climate+Sounder&rft.au=Hinson%2C+David+P%3BAsmar%2C+Sami+W%3BKahan%2C+Daniel+S%3BAkopian%2C+Varoujan%3BHaberle%2C+Robert+M%3BSpiga%2C+Aymeric%3BSchofield%2C+John+T%3BKleinboehl%2C+Armin%3BAbdou%2C+Wedad+A%3BLewis%2C+Stephen+R%3BPaik%2C+Meegyeong%3BMaalouf%2C+Sami+G&rft.aulast=Hinson&rft.aufirst=David&rft.date=2014-11-15&rft.volume=243&rft.issue=&rft.spage=91&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.09.019 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 52 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2015-07-17 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - aerosols; altitude; atmosphere; atmospheric pressure; carbon dioxide; climate; clouds; cyclic processes; diurnal variations; eddies; Gale Crater; general circulation models; ice; ice caps; Mars; Mars Climate Sounder; Mars Reconnaissance Orbiter; numerical models; occultation; orbital observations; planets; radio-wave methods; seasonal variations; simulation; temperature; terrestrial planets; Tharsis DO - http://dx.doi.org/10.1016/j.icarus.2014.09.019 ER - TY - JOUR T1 - Infrared spectra and optical constants of astronomical ices; II, Ethane and ethylene AN - 1696875644; 2015-069061 JF - Icarus AU - Hudson, R L AU - Gerakines, P A AU - Moore, M H Y1 - 2014/11/15/ PY - 2014 DA - 2014 Nov 15 SP - 148 EP - 157 PB - Elsevier, New York, NY VL - 243 SN - 0019-1035, 0019-1035 KW - near-infrared spectra KW - trans-Neptunian objects KW - aliphatic hydrocarbons KW - ethane KW - alkanes KW - dwarf planets KW - temperature KW - infrared spectra KW - organic compounds KW - ethylene KW - optical constant KW - ice KW - alkenes KW - hydrocarbons KW - spectra KW - refractive index KW - Pluto KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875644?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Infrared+spectra+and+optical+constants+of+astronomical+ices%3B+II%2C+Ethane+and+ethylene&rft.au=Hudson%2C+R+L%3BGerakines%2C+P+A%3BMoore%2C+M+H&rft.aulast=Hudson&rft.aufirst=R&rft.date=2014-11-15&rft.volume=243&rft.issue=&rft.spage=148&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.09.001 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 34 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-07-17 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; alkenes; dwarf planets; ethane; ethylene; hydrocarbons; ice; infrared spectra; near-infrared spectra; optical constant; organic compounds; Pluto; refractive index; spectra; temperature; trans-Neptunian objects DO - http://dx.doi.org/10.1016/j.icarus.2014.09.001 ER - TY - RPRT T1 - TIER 2-MARS 2020 MISSION, WASHINGTON DC. AN - 1701285720; 16318 AB - PURPOSE: This Final Environmental Impact Statement (FEIS) has been prepared by the National Aeronautics and Space Administration (NASA) in accordance with the National Environmental Policy Act (NEPA) of 1969, as amended, to assist in the decision-making process for the proposed Mars 2020 mission. This Environmental Impact Statement (EIS) is a tiered document (Tier 2 EIS) under NASAs Programmatic EIS for the Mars Exploration Program. The Proposed Action addressed in this FEIS is to continue preparations for and implementation of the Mars 2020 mission. The Mars 2020 spacecraft would be launched on an expendable launch vehicle during a launch opportunity from July through August 2020. The Mars 2020 spacecraft would deliver a large, mobile science laboratory (rover) with advanced instrumentation to a scientifically interesting location on the surface of Mars early in 2021. The design of the Mars 2020 spacecraft and rover would be based upon and similar to that used in the 2011 Mars Science Laboratory Mission, including the use of a Multi-Mission Radioisotope Thermoelectric Generator. The purpose of the Mars 2020 mission would be to continue NASAs in-depth exploration of Mars. The mission described by the Mars 2020 Science Definition Team Report provides a basis for the proposed Mars 2020 mission, recommending it consist of a science-focused, highly mobile rover designed to explore and investigate in detail a site on Mars that was likely once habitable. The mission concept includes new scientific instrumentation designed to seek signs of past life in situ. This instrumentation would be used to select a suite of samples that would be stored in a sealable cache that could be returned to Earth by a future mission. The mission would also demonstrate new technology for future exploration of Mars (both robotic and human missions). JF - EPA number: 140324, Second Final EIS (Tiering, November 14, 2014 PY - 2014 KW - Research and Development KW - Aerospace KW - International Programs KW - Research KW - Radioactive Substances KW - Military Facilities (Air Force) KW - Spacecraft KW - Solar Energy KW - Air Quality KW - Mars KW - Florida KW - Kennedy Space Center KW - Cape Canaveral Air Force Station KW - Executive Order 12114, Compliance KW - Clean Air Act Amendments of 1990, Emission Standards KW - Marine Mammal Protection Act of 1972, Compliance KW - Magnuson Fishery Conservation and Management Act of 1976, Compliance UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701285720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/Environmental+Impact+Statements%3A+Digests&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=report&rft.jtitle=&rft.atitle=&rft.au=&rft.aulast=&rft.aufirst=&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=TIER+2-MARS+2020+MISSION%2C+WASHINGTON+DC.&rft.title=TIER+2-MARS+2020+MISSION%2C+WASHINGTON+DC.&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Name - National Aeronautics and Space Administration, Science Mission Directorate, Washington, DC N1 - Date revised - 2015-08-01 N1 - SuppNotes - Final. Preparation date: November 14, 2014 N1 - Last updated - 2015-08-05 ER - TY - CPAPER T1 - Modeling Damage in Textile Composites Using Meso- and Microscale Approaches T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645173314; 6315147 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Bednarcyk, Brett AU - Stier, Bertram AU - Pineda, Evan AU - Simon, Jaan AU - Reese, Stefanie Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Composite materials KW - Textiles UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645173314?accountid=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=Modeling+Damage+in+Textile+Composites+Using+Meso-+and+Microscale+Approaches&rft.au=Bednarcyk%2C+Brett%3BStier%2C+Bertram%3BPineda%2C+Evan%3BSimon%2C+Jaan%3BReese%2C+Stefanie&rft.aulast=Bednarcyk&rft.aufirst=Brett&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 - CPAPER T1 - Sound Transmission Loss Through a Corrugated-Core Sandwich Panel with Integrated Acoustic Resonators T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645169407; 6315693 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Schiller, Noah AU - Allen, Albert AU - Zalewski, Bart AU - Beck, Benjamin Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Acoustics KW - Sound KW - Sound transmission UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645169407?accountid=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=Sound+Transmission+Loss+Through+a+Corrugated-Core+Sandwich+Panel+with+Integrated+Acoustic+Resonators&rft.au=Schiller%2C+Noah%3BAllen%2C+Albert%3BZalewski%2C+Bart%3BBeck%2C+Benjamin&rft.aulast=Schiller&rft.aufirst=Noah&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 - CPAPER T1 - NIAC: the most visionary and far-reaching program in NASA T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645166876; 6315547 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Falker, Jay Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Mechanical engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645166876?accountid=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=NIAC%3A+the+most+visionary+and+far-reaching+program+in+NASA&rft.au=Falker%2C+Jay&rft.aulast=Falker&rft.aufirst=Jay&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 - Southern Laurentide ice-sheet retreat synchronous with rising boreal summer insolation AN - 1637541936; 2014-102425 AB - Establishing the precise timing for the onset of ice-sheet retreat at the end of the Last Glacial Maximum (LGM) is critical for delineating mechanisms that drive deglaciations. Uncertainties in the timing of ice-margin retreat and global ice-volume change allow a variety of plausible deglaciation triggers. Using boulder (super 10) Be surface exposure ages, we date initial southern Laurentide ice-sheet (LIS) retreat from LGM moraines in Wisconsin (USA) to 23.0 + or - 0.6 ka, coincident with retreat elsewhere along the southern LIS and synchronous with the initial rise in boreal summer insolation 24-23 ka. We show with climate-surface mass balance simulations that this small increase in boreal summer insolation alone is potentially sufficient to drive enhanced southern LIS surface ablation. We also date increased southern LIS retreat after ca. 20.5 ka likely driven by an acceleration in rising isolation. This near-instantaneous southern LIS response to boreal summer insolation before any rise in atmospheric CO (sub 2) supports the Milankovic hypothesis of orbital forcing of deglaciations. JF - Geology (Boulder) AU - Ullman, David J AU - Carlson, Anders E AU - LeGrande, Allegra N AU - Anslow, Faron S AU - Moore, Angus K AU - Caffee, Marc AU - Syverson, Kent M AU - Licciardi, Joseph M Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 SP - 23 EP - 26 PB - Geological Society of America (GSA), Boulder, CO VL - 43 IS - 1 SN - 0091-7613, 0091-7613 KW - United States KW - Laurentide ice sheet KW - last glacial maximum KW - isotopes KW - paleoclimatology KW - exposure age KW - deglaciation KW - upper Pleistocene KW - orbital forcing KW - Cenozoic KW - radioactive isotopes KW - terminal moraines KW - sediments KW - moraines KW - Wisconsin KW - climate forcing KW - alkaline earth metals KW - boulders KW - Quaternary KW - Be-10 KW - clastic sediments KW - end moraines KW - metals KW - Milankovitch theory KW - Pleistocene KW - insolation KW - beryllium KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637541936?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Southern+Laurentide+ice-sheet+retreat+synchronous+with+rising+boreal+summer+insolation&rft.au=Ullman%2C+David+J%3BCarlson%2C+Anders+E%3BLeGrande%2C+Allegra+N%3BAnslow%2C+Faron+S%3BMoore%2C+Angus+K%3BCaffee%2C+Marc%3BSyverson%2C+Kent+M%3BLicciardi%2C+Joseph+M&rft.aulast=Ullman&rft.aufirst=David&rft.date=2014-11-14&rft.volume=43&rft.issue=1&rft.spage=23&rft.isbn=&rft.btitle=&rft.title=Geology+%28Boulder%29&rft.issn=00917613&rft_id=info:doi/10.1130%2FG36179.1 L2 - http://www.gsajournals.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 - 2014-01-01 N1 - Number of references - 23 N1 - PubXState - CO N1 - Document feature - illus. incl. geol. sketch map N1 - SuppNotes - GSA Data Repository item 2015024 N1 - Last updated - 2015-01-15 N1 - CODEN - GLGYBA N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Be-10; beryllium; boulders; Cenozoic; clastic sediments; climate forcing; deglaciation; end moraines; exposure age; insolation; isotopes; last glacial maximum; Laurentide ice sheet; metals; Milankovitch theory; moraines; orbital forcing; paleoclimatology; Pleistocene; Quaternary; radioactive isotopes; sediments; terminal moraines; United States; upper Pleistocene; Wisconsin DO - http://dx.doi.org/10.1130/G36179.1 ER - TY - JOUR T1 - Spatial variability in photosynthetic and heterotrophic activity drives localized delta (super 13) C (sub org) fluctuations and carbonate precipitation in hypersaline microbial mats AN - 1707523148; 2015-081183 AB - Modern laminated photosynthetic microbial mats are ideal environments to study how microbial activity creates and modifies carbon and sulfur isotopic signatures prior to lithification. Laminated microbial mats from a hypersaline lagoon (Guerrero Negro, Baja California, Mexico) maintained in a flume in a greenhouse at NASA Ames Research Center were sampled for delta (super 13) C of organic material and carbonate to assess the impact of carbon fixation (e.g., photosynthesis) and decomposition (e.g., bacterial respiration) on delta (super 13) C signatures. In the photic zone, the delta (super 13) C (sub org) signature records a complex relationship between the activities of cyanobacteria under variable conditions of CO (sub 2) limitation with a significant contribution from green sulfur bacteria using the reductive TCA cycle for carbon fixation. Carbonate is present in some layers of the mat, associated with high concentrations of bacteriochlorophyll e (characteristic of green sulfur bacteria) and exhibits delta (super 13) C signatures similar to DIC in the overlying water column (-2.0 ppm), with small but variable decreases consistent with localized heterotrophic activity from sulfate-reducing bacteria (SRB). Model results indicate respiration rates in the upper 12 mm of the mat alter in situ pH and HCO (super -) (sub 3) concentrations to create both phototrophic CO (sub 2) limitation and carbonate supersaturation, leading to local precipitation of carbonate minerals. The measured activity of SRB with depth suggests they variably contribute to decomposition in the mat dependent on organic substrate concentrations. Millimeter-scale variability in the delta (super 13) C (sub org) signature beneath the photic zone in the mat is a result of shifting dominance between cyanobacteria and green sulfur bacteria with the aggregate signature overprinted by heterotrophic reworking by SRB and methanogens. These observations highlight the impact of sedimentary microbial processes on delta (super 13) C (sub org) signatures; these processes need to be considered when attempting to relate observed isotopic signatures in ancient sedimentary strata to conditions in the overlying water column at the time of deposition and associated inferences about carbon cycling. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - Geobiology AU - Houghton, J AU - Fike, D AU - Druschel, G AU - Orphan, V AU - Hoehler, T M AU - Des Marais, D J Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 557 EP - 574 PB - Wiley, Oxford VL - 12 IS - 6 SN - 1472-4677, 1472-4677 KW - photosynthesis KW - isotopes KW - microbial mats KW - stable isotopes KW - laboratory studies KW - Guerrero Negro Mexico KW - carbon KW - organic carbon KW - chemical composition KW - sedimentary structures KW - hypersaline environment KW - cyanobacteria KW - experimental studies KW - numerical models KW - living taxa KW - pigments KW - isotope ratios KW - biogenic structures KW - C-13/C-12 KW - photochemistry KW - geochemical cycle KW - Mexico KW - Baja California Sur Mexico KW - precipitation KW - bacteria KW - lacustrine environment KW - carbon cycle KW - carbonates KW - 06A:Sedimentary petrology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707523148?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Spatial+variability+in+photosynthetic+and+heterotrophic+activity+drives+localized+delta+%28super+13%29+C+%28sub+org%29+fluctuations+and+carbonate+precipitation+in+hypersaline+microbial+mats&rft.au=Houghton%2C+J%3BFike%2C+D%3BDruschel%2C+G%3BOrphan%2C+V%3BHoehler%2C+T+M%3BDes+Marais%2C+D+J&rft.aulast=Houghton&rft.aufirst=J&rft.date=2014-11-01&rft.volume=12&rft.issue=6&rft.spage=557&rft.isbn=&rft.btitle=&rft.title=Geobiology&rft.issn=14724677&rft_id=info:doi/10.1111%2Fgbi.12113 L2 - http://www.blackwellpublishing.com/journal.asp?ref=1472-4677 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 - 75 N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - NSF grants EAR-1124389, EAR-1123391, EAR-1304352, and EAR-1261423 N1 - Last updated - 2015-08-27 N1 - SubjectsTermNotLitGenreText - bacteria; Baja California Sur Mexico; biogenic structures; C-13/C-12; carbon; carbon cycle; carbonates; chemical composition; cyanobacteria; experimental studies; geochemical cycle; Guerrero Negro Mexico; hypersaline environment; isotope ratios; isotopes; laboratory studies; lacustrine environment; living taxa; Mexico; microbial mats; numerical models; organic carbon; photochemistry; photosynthesis; pigments; precipitation; sedimentary structures; stable isotopes DO - http://dx.doi.org/10.1111/gbi.12113 ER - TY - JOUR T1 - Evidence for middle Amazonian catastrophic flooding and glaciation on Mars AN - 1696877081; 2015-069038 JF - Icarus AU - Rodriguez, J Alexis P AU - Gulick, Virginia C AU - Baker, Victor R AU - Platz, Thomas AU - Fairen, Alberto G AU - Miyamoto, Hideaki AU - Kargel, Jeffrey S AU - Rice, James W AU - Glines, Natalie Y1 - 2014/11/01/ PY - 2014 DA - 2014 Nov 01 SP - 202 EP - 210 PB - Elsevier, New York, NY VL - 242 SN - 0019-1035, 0019-1035 KW - impact features KW - glaciation KW - erosion KW - Mars KW - mapping KW - landforms KW - outflow channels KW - debris flows KW - Context Camera KW - paleoclimatology KW - Amazonian KW - mass movements KW - floods KW - HiRISE KW - Chryse Planitia KW - Mars Reconnaissance Orbiter KW - glacial features KW - canyons KW - bedforms KW - High Resolution Imaging Science Experiment KW - terrestrial planets KW - morphology KW - planets KW - impact craters KW - remote sensing KW - catastrophes KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877081?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Evidence+for+middle+Amazonian+catastrophic+flooding+and+glaciation+on+Mars&rft.au=Rodriguez%2C+J+Alexis+P%3BGulick%2C+Virginia+C%3BBaker%2C+Victor+R%3BPlatz%2C+Thomas%3BFairen%2C+Alberto+G%3BMiyamoto%2C+Hideaki%3BKargel%2C+Jeffrey+S%3BRice%2C+James+W%3BGlines%2C+Natalie&rft.aulast=Rodriguez&rft.aufirst=J+Alexis&rft.date=2014-11-01&rft.volume=242&rft.issue=&rft.spage=202&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.06.008 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 54 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-07-17 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - Amazonian; bedforms; canyons; catastrophes; Chryse Planitia; Context Camera; debris flows; erosion; floods; glacial features; glaciation; High Resolution Imaging Science Experiment; HiRISE; impact craters; impact features; landforms; mapping; Mars; Mars Reconnaissance Orbiter; mass movements; morphology; outflow channels; paleoclimatology; planets; remote sensing; terrestrial planets DO - http://dx.doi.org/10.1016/j.icarus.2014.06.008 ER - TY - JOUR T1 - Presolar grains in the CM2 chondrite Sutter's Mill AN - 1692744621; 2015-059957 AB - The Sutter's Mill (SM) carbonaceous chondrite is a regolith breccia, composed predominantly of CM2 clasts with varying degrees of aqueous alteration and thermal metamorphism. An investigation of presolar grains in four Sutter's Mill sections, SM43, SM51, SM2-4, and SM18, was carried out using NanoSIMS ion mapping technique. A total of 37 C-anomalous grains and one O-anomalous grain have been identified, indicating an abundance of 63 ppm for presolar C-anomalous grains and 2 ppm for presolar oxides. Thirty-one silicon carbide (SiC), five carbonaceous grains, and one Al-oxide (Al (sub 2) O (sub 3) ) were confirmed based on their elemental compositions determined by C-N-Si and O-Si-Mg-Al isotopic measurements. The overall abundance of SiC grains in Sutter's Mill (55 ppm) is consistent with those in other CM chondrites. The absence of presolar silicates in Sutter's Mill suggests that they were destroyed by aqueous alteration on the parent asteroid. Furthermore, SM2-4 shows heterogeneous distributions of presolar SiC grains (12-54 ppm) in different matrix areas, indicating that the fine-grained matrix clasts come from different sources, with various thermal histories, in the solar nebula. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Zhao, Xuchao AU - Lin, Yangting AU - Yin, Qing-Zhu AU - Zhang, Jianchao AU - Hao, Jialong AU - Zolensky, Michael AU - Jenniskens, Peter Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2038 EP - 2046 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 11 SN - 1086-9379, 1086-9379 KW - stony meteorites KW - ion probe data KW - isotopes KW - mass spectra KW - carbides KW - thermal history KW - silicon KW - stable isotopes KW - nitrogen KW - meteorites KW - presolar grains KW - carbon KW - alloys KW - spectra KW - heterogeneity KW - chondrites KW - N-15/N-14 KW - Si-29/Si-28 KW - isotope ratios KW - parent bodies KW - C-13/C-12 KW - Sutter's Mill Meteorite KW - anomalies KW - thermal metamorphism KW - carbonaceous chondrites KW - metamorphism KW - aqueous alteration KW - NanoSIMS KW - CM chondrites 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/1692744621?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Presolar+grains+in+the+CM2+chondrite+Sutter%27s+Mill&rft.au=Zhao%2C+Xuchao%3BLin%2C+Yangting%3BYin%2C+Qing-Zhu%3BZhang%2C+Jianchao%3BHao%2C+Jialong%3BZolensky%2C+Michael%3BJenniskens%2C+Peter&rft.aulast=Zhao&rft.aufirst=Xuchao&rft.date=2014-11-01&rft.volume=49&rft.issue=11&rft.spage=2038&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12289 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 - 24 N1 - PubXState - AR N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-07-02 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - alloys; anomalies; aqueous alteration; C-13/C-12; carbides; carbon; carbonaceous chondrites; chondrites; CM chondrites; heterogeneity; ion probe data; isotope ratios; isotopes; mass spectra; metamorphism; meteorites; N-15/N-14; NanoSIMS; nitrogen; parent bodies; presolar grains; Si-29/Si-28; Si-30/Si-28; silicon; spectra; stable isotopes; stony meteorites; Sutter's Mill Meteorite; thermal history; thermal metamorphism DO - http://dx.doi.org/10.1111/maps.12289 ER - TY - JOUR T1 - Mineralogy and petrography of C asteroid regolith; the Sutter's Mill CM meteorite AN - 1692744604; 2015-059954 AB - Based upon our characterization of three separate stones by electron and X-ray beam analyses, computed X-ray microtomography, Raman microspectrometry, and visible-IR spectrometry, Sutter's Mill is a unique regolith breccia consisting mainly of various CM lithologies. Most samples resemble existing available CM2 chondrites, consisting of chondrules and calcium-aluminum-rich inclusion (CAI) set within phyllosilicate-dominated matrix (mainly serpentine), pyrrhotite, pentlandite, tochilinite, and variable amounts of Ca-Mg-Fe carbonates. Some lithologies have witnessed sufficient thermal metamorphism to transform phyllosilicates into fine-grained olivine, tochilinite into troilite, and destroy carbonates. One finely comminuted lithology contains xenolithic materials (enstatite, Fe-Cr phosphides) suggesting impact of a reduced asteroid (E or M class) onto the main Sutter's Mill parent asteroid, which was probably a C class asteroid. One can use Sutter's Mill to help predict what will be found on the surfaces of C class asteroids such as Ceres and the target asteroids of the OSIRIS-REx and Hayabusa 2 sample return missions (which will visit predominantly primitive asteroids). C class asteroid regolith may well contain a mixture of hydrated and thermally dehydrated indigenous materials as well as a significant admixture of exogenous material would be essential to the successful interpretation of mineralogical and bulk compositional data. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Zolensky, Michael AU - Mikouchi, Takashi AU - Fries, Marc AU - Bodnar, Robert AU - Jenniskens, Peter AU - Yin, Qing-Zhu AU - Hagiya, Kenji AU - Ohsumi, Kazumasa AU - Komatsu, Mutsumi AU - Colbert, Matthew AU - Hanna, Romy AU - Maisano, Jessie AU - Ketcham, Richard AU - Kebukawa, Yoko AU - Nakamura, Tomoki AU - Matsuoka, Moe AU - Sasaki, Sho AU - Tsuchiyama, Akira AU - Gounelle, Matthieu AU - Le, Loan AU - Martinez, James AU - Ross, Kent AU - Rahman, Zia Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 1997 EP - 2016 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 11 SN - 1086-9379, 1086-9379 KW - silicates KW - stony meteorites KW - asteroids KW - optical spectra KW - electron diffraction data KW - calcium-aluminum inclusions KW - infrared spectra KW - electron probe data KW - meteorites KW - mineral composition KW - inclusions KW - enstatite chondrites KW - spectra KW - chondrites KW - xenoliths KW - C-type asteroids KW - parent bodies KW - Sutter's Mill Meteorite KW - electron microscopy data KW - thermal metamorphism KW - carbonaceous chondrites KW - metamorphism KW - comminution KW - X-ray data KW - Raman spectra KW - chondrules KW - petrography KW - sheet silicates KW - CM chondrites KW - computed tomography data KW - SEM data KW - regolith KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692744604?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mineralogy+and+petrography+of+C+asteroid+regolith%3B+the+Sutter%27s+Mill+CM+meteorite&rft.au=Zolensky%2C+Michael%3BMikouchi%2C+Takashi%3BFries%2C+Marc%3BBodnar%2C+Robert%3BJenniskens%2C+Peter%3BYin%2C+Qing-Zhu%3BHagiya%2C+Kenji%3BOhsumi%2C+Kazumasa%3BKomatsu%2C+Mutsumi%3BColbert%2C+Matthew%3BHanna%2C+Romy%3BMaisano%2C+Jessie%3BKetcham%2C+Richard%3BKebukawa%2C+Yoko%3BNakamura%2C+Tomoki%3BMatsuoka%2C+Moe%3BSasaki%2C+Sho%3BTsuchiyama%2C+Akira%3BGounelle%2C+Matthieu%3BLe%2C+Loan%3BMartinez%2C+James%3BRoss%2C+Kent%3BRahman%2C+Zia&rft.aulast=Zolensky&rft.aufirst=Michael&rft.date=2014-11-01&rft.volume=49&rft.issue=11&rft.spage=1997&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12386 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 - 52 N1 - PubXState - AR N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-07-02 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - asteroids; C-type asteroids; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; chondrules; CM chondrites; comminution; computed tomography data; electron diffraction data; electron microscopy data; electron probe data; enstatite chondrites; inclusions; infrared spectra; metamorphism; meteorites; mineral composition; optical spectra; parent bodies; petrography; Raman spectra; regolith; SEM data; sheet silicates; silicates; spectra; stony meteorites; Sutter's Mill Meteorite; thermal metamorphism; X-ray data; xenoliths DO - http://dx.doi.org/10.1111/maps.12386 ER - TY - JOUR T1 - The amino acid composition of the Sutter's Mill CM2 carbonaceous chondrite AN - 1692744422; 2015-059961 AB - We determined the abundances and enantiomeric compositions of amino acids in Sutter's Mill fragment #2 (designated SM2) recovered prior to heavy rains that fell April 25-26, 2012, and two other meteorite fragments, SM12 and SM51, that were recovered postrain. We also determined the abundance, enantiomeric, and isotopic compositions of amino acids in soil from the recovery site of fragment SM51. The three meteorite stones experienced terrestrial amino acid contamination, as evidenced by the low d/l ratios of several proteinogenic amino acids. The d/l ratios were higher in SM2 than in SM12 and SM51, consistent with rain introducing additional l-amino acid contaminants to SM12 and SM51. Higher percentages of glycine, beta -alanine, and gamma -amino-n-butyric acid were observed in free form in SM2 and SM51 compared with the soil, suggesting that these free amino acids may be indigenous. Trace levels of d+l-beta -aminoisobutyric acid (beta -AIB) observed in all three meteorites are not easily explained as terrestrial contamination, as beta -AIB is rare on Earth and was not detected in the soil. Bulk carbon and nitrogen and isotopic ratios of the SM samples and the soil also indicate terrestrial contamination, as does compound-specific isotopic analysis of the amino acids in the soil. The amino acid abundances in SM2, the most pristine SM meteorite analyzed here, are approximately 20-fold lower than in the Murchison CM2 carbonaceous chondrite. This may be due to thermal metamorphism in the Sutter's Mill parent body at temperatures greater than observed for other aqueously altered CM2 meteorites. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Burton, Aaron S AU - Glavin, Daniel P AU - Elsila, Jamie E AU - Dworkin, Jason P AU - Jenniskens, Peter AU - Yin, Qing-Zhu Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2074 EP - 2086 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 11 SN - 1086-9379, 1086-9379 KW - terrestrial environment KW - stony meteorites KW - isotopes KW - alanine KW - gas chromatograms KW - mass spectra KW - stable isotopes KW - nitrogen KW - meteorites KW - pyrolysis KW - carbon KW - amino acids KW - spectra KW - enantiomers KW - chondrites KW - liquid chromatography KW - chromatography KW - N-15/N-14 KW - isotope ratios KW - parent bodies KW - C-13/C-12 KW - glycine KW - Sutter's Mill Meteorite KW - chirality KW - thermal metamorphism KW - terrestrial contamination KW - carbonaceous chondrites KW - metamorphism KW - meteorite falls KW - organic compounds KW - organic acids KW - chromatograms KW - CM chondrites KW - aspartic acid KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692744422?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+amino+acid+composition+of+the+Sutter%27s+Mill+CM2+carbonaceous+chondrite&rft.au=Burton%2C+Aaron+S%3BGlavin%2C+Daniel+P%3BElsila%2C+Jamie+E%3BDworkin%2C+Jason+P%3BJenniskens%2C+Peter%3BYin%2C+Qing-Zhu&rft.aulast=Burton&rft.aufirst=Aaron&rft.date=2014-11-01&rft.volume=49&rft.issue=11&rft.spage=2074&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12281 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 - 50 N1 - PubXState - AR N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-07-02 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - alanine; amino acids; aspartic acid; C-13/C-12; carbon; carbonaceous chondrites; chirality; chondrites; chromatograms; chromatography; CM chondrites; enantiomers; gas chromatograms; glycine; isotope ratios; isotopes; liquid chromatography; mass spectra; metamorphism; meteorite falls; meteorites; N-15/N-14; nitrogen; organic acids; organic compounds; parent bodies; pyrolysis; spectra; stable isotopes; stony meteorites; Sutter's Mill Meteorite; terrestrial contamination; terrestrial environment; thermal metamorphism DO - http://dx.doi.org/10.1111/maps.12281 ER - TY - JOUR T1 - Mid-infrared study of stones from the Sutter's Mill Meteorite AN - 1692744334; 2015-059955 AB - The Sutter's Mill meteorite fell in northern California on April 22, 2012. Several fragments of the meteorite were recovered, some of them shortly after the fall, others several days later after a heavy rainstorm. In this work, we analyzed several samples of four fragments-SM2, SM12, SM20, and SM30-from the Sutter's Mill meteorite with two infrared (IR) microscopes operating in the 4000-650 cm (super -1) (2.5-15.4 mu m) range. Spectra show absorption features associated with minerals such as olivines, phyllosilicates, carbonates, and possibly pyroxenes, as well as organics. Spectra of specific minerals vary from one particle to another within a given stone, and even within a single particle, indicating a nonuniform mineral composition. Infrared features associated with aliphatic CH (sub 2) and CH (sub 3) groups associated with organics are also seen in several spectra. However, the presence of organics in the samples studied is not clear because these features overlap with carbonate overtone bands. Finally, other samples collected within days after the rainstorm show evidence for bacterial terrestrial contamination, which indicates how quickly meteorites can be contaminated on such small scales. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Nuevo, Michel AU - Sandford, Scott A AU - Flynn, George J AU - Wirick, Susan AU - Jenniskens, Peter Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2017 EP - 2026 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 11 SN - 1086-9379, 1086-9379 KW - silicates KW - stony meteorites KW - aliphatic hydrocarbons KW - Sutter's Mill Meteorite KW - olivine group KW - terrestrial contamination KW - carbonaceous chondrites KW - meteorite falls KW - infrared spectra KW - synchrotron radiation KW - nesosilicates KW - meteorites KW - FTIR spectra KW - organic compounds KW - mineral composition KW - olivine KW - bacteria KW - orthosilicates KW - hydrocarbons KW - sheet silicates KW - spectra KW - chondrites KW - carbonates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692744334?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mid-infrared+study+of+stones+from+the+Sutter%27s+Mill+Meteorite&rft.au=Nuevo%2C+Michel%3BSandford%2C+Scott+A%3BFlynn%2C+George+J%3BWirick%2C+Susan%3BJenniskens%2C+Peter&rft.aulast=Nuevo&rft.aufirst=Michel&rft.date=2014-11-01&rft.volume=49&rft.issue=11&rft.spage=2017&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12269 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 - 9 N1 - PubXState - AR N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-07-02 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; bacteria; carbonaceous chondrites; carbonates; chondrites; FTIR spectra; hydrocarbons; infrared spectra; meteorite falls; meteorites; mineral composition; nesosilicates; olivine; olivine group; organic compounds; orthosilicates; sheet silicates; silicates; spectra; stony meteorites; Sutter's Mill Meteorite; synchrotron radiation; terrestrial contamination DO - http://dx.doi.org/10.1111/maps.12269 ER - TY - JOUR T1 - Diamond xenolith and matrix organic matter in the Sutter's Mill Meteorite measured by C-XANES AN - 1692744159; 2015-059963 AB - The Sutter's Mill (SM) meteorite fell in El Dorado County, California, on April 22, 2012. This meteorite is a regolith breccia composed of CM chondrite material and at least one xenolithic phase: oldhamite. The meteorite studied here, SM2 (subsample 5), was one of three meteorites collected before it rained extensively on the debris site, thus preserving the original asteroid regolith mineralogy. Two relatively large (10 mu m sized) possible diamond grains were observed in SM2-5 surrounded by fine-grained matrix. In the present work, we analyzed a focused ion beam (FIB) milled thin section that transected a region containing these two potential diamond grains as well as the surrounding fine-grained matrix employing carbon and nitrogen X-ray absorption near-edge structure (C-XANES and N-XANES) spectroscopy using a scanning transmission X-ray microscope (STXM) (Beamline 5.3.2 at the Advanced Light Source, Lawrence Berkeley National Laboratory). The STXM analysis revealed that the matrix of SM2-5 contains C-rich grains, possibly organic nanoglobules. A single carbonate grain was also detected. The C-XANES spectrum of the matrix is similar to that of insoluble organic matter (IOM) found in other CM chondrites. However, no significant nitrogen-bearing functional groups were observed with N-XANES. One of the possible diamond grains contains a Ca-bearing inclusion that is not carbonate. C-XANES features of the diamond-edges suggest that the diamond might have formed by the CVD process, or in a high-temperature and -pressure environment in the interior of a much larger parent body. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Kebukawa, Yoko AU - Zolensky, Michael E AU - Kilcoyne, A L David AU - Rahman, Zia AU - Jenniskens, Peter AU - Cody, George D Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2095 EP - 2103 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 11 SN - 1086-9379, 1086-9379 KW - stony meteorites KW - asteroids KW - scanning transmission X-ray microscopy KW - oldhamite KW - nitrogen KW - XANES spectra KW - meteorites KW - carbon KW - inclusions KW - diamond KW - spectra KW - organic carbon KW - chondrites KW - xenoliths KW - parent bodies KW - matrix KW - Sutter's Mill Meteorite KW - native elements KW - carbonaceous chondrites KW - X-ray spectra KW - organic compounds KW - CM chondrites KW - sulfides KW - regolith KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692744159?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Diamond+xenolith+and+matrix+organic+matter+in+the+Sutter%27s+Mill+Meteorite+measured+by+C-XANES&rft.au=Kebukawa%2C+Yoko%3BZolensky%2C+Michael+E%3BKilcoyne%2C+A+L+David%3BRahman%2C+Zia%3BJenniskens%2C+Peter%3BCody%2C+George+D&rft.aulast=Kebukawa&rft.aufirst=Yoko&rft.date=2014-11-01&rft.volume=49&rft.issue=11&rft.spage=2095&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12312 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 - 41 N1 - PubXState - AR N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-07-02 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - asteroids; carbon; carbonaceous chondrites; chondrites; CM chondrites; diamond; inclusions; matrix; meteorites; native elements; nitrogen; oldhamite; organic carbon; organic compounds; parent bodies; regolith; scanning transmission X-ray microscopy; spectra; stony meteorites; sulfides; Sutter's Mill Meteorite; X-ray spectra; XANES spectra; xenoliths DO - http://dx.doi.org/10.1111/maps.12312 ER - TY - JOUR T1 - Detection and rapid recovery of the Sutter's Mill Meteorite fall as a model for future recoveries worldwide AN - 1692741702; 2015-059953 AB - The Sutter's Mill C-type meteorite fall occurred on 22 April 2012 in and around the town of Coloma, California. The exact location of the meteorite fall was determined within hours of the event using a combination of eyewitness reports, weather radar imagery, and seismometry data. Recovery of the first meteorites occurred within 2 days and continued for months afterward. The recovery effort included local citizens, scientists, and meteorite hunters, and featured coordination efforts by local scientific institutions. Scientific analysis of the collected meteorites revealed characteristics that were available for study only because the rapid collection of samples had minimized terrestrial contamination/alteration. This combination of factors-rapid and accurate location of the event, participation in the meteorite search by the public, and coordinated scientific investigation of recovered samples-is a model that was widely beneficial and should be emulated in future meteorite falls. The tools necessary to recreate the Sutter's Mill recovery are available, but are currently underutilized in much of the world. Weather radar networks, scientific institutions with interest in meteoritics, and the interested public are available globally. Therefore, it is possible to repeat the Sutter's Mill recovery model for future meteorite falls around the world, each for relatively little cost with a dedicated researcher. Doing so will significantly increase the number of fresh meteorite falls available for study, provide meteorite material that can serve as the nuclei of new meteorite collections, and will improve the public visibility of meteoritics research. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Fries, Marc AU - Le Corre, Lucille AU - Hankey, Mike AU - Fries, Jeff AU - Matson, Robert AU - Schaefer, Jake AU - Reddy, Vishnu AU - Jenniskens, Peter Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 1989 EP - 1996 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 11 SN - 1086-9379, 1086-9379 KW - United States KW - imagery KW - stony meteorites KW - El Dorado County California KW - public awareness KW - radar methods KW - Sutter's Mill Meteorite KW - carbonaceous chondrites KW - recovery KW - meteorite falls KW - models KW - California KW - meteorites KW - Coloma California KW - detection KW - future KW - chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692741702?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Detection+and+rapid+recovery+of+the+Sutter%27s+Mill+Meteorite+fall+as+a+model+for+future+recoveries+worldwide&rft.au=Fries%2C+Marc%3BLe+Corre%2C+Lucille%3BHankey%2C+Mike%3BFries%2C+Jeff%3BMatson%2C+Robert%3BSchaefer%2C+Jake%3BReddy%2C+Vishnu%3BJenniskens%2C+Peter&rft.aulast=Fries&rft.aufirst=Marc&rft.date=2014-11-01&rft.volume=49&rft.issue=11&rft.spage=1989&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12249 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 - 22 N1 - PubXState - AR N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-07-02 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - California; carbonaceous chondrites; chondrites; Coloma California; detection; El Dorado County California; future; imagery; meteorite falls; meteorites; models; public awareness; radar methods; recovery; stony meteorites; Sutter's Mill Meteorite; United States DO - http://dx.doi.org/10.1111/maps.12249 ER - TY - JOUR T1 - The Sutter's Mill Meteorite; thermoluminescence data on thermal and metamorphic history AN - 1692741618; 2015-059958 AB - A piece of the Sutter's Mill meteorite, fragment SM2-1d, has been examined using thermoluminescence techniques to better understand its thermal and metamorphic history. The sample had very weak but easily measureable natural and induced thermoluminescence (TL) signals; the signal-to-noise ratio was better than 10. The natural TL was restricted to the high-temperature regions of the glow curve suggesting that the meteorite had been heated to approximately 300 degrees C within the time it takes for the TL signal to recover from a heating event, probably within the last 10 (super 5) years. It is possible that this reflects heating during release from the parent body, close passage by the Sun, or heating during atmospheric passage. Of these three options, the least likely is the first, but the other possibilities are equally likely. It seems that temperatures of approximately 300 degrees C reached 5 or 6 mm into the meteorite, so that all but one of the small Sutter's Mill stones have been heated. The Dhajala normalized induced TL signal for SM2-1d is comparable to that of type 3.0 chondrites and is unlike normal CM chondrites, the class it most closely resembles, which do not have detectable TL sensitivity. The shape of the induced TL curve is comparable to other low-type ordinary, CV, and CO chondrites, in that it has a broad hummocky structure, but does not resemble any of them in detail. This suggests that Sutter's Mill is a unique, low-petrographic-type (3.0) chondrite. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Sears, Derek W AU - Beauford, Robert AU - Jenniskens, Peter Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2047 EP - 2055 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 11 SN - 1086-9379, 1086-9379 KW - stony meteorites KW - parent bodies KW - atmosphere KW - Sutter's Mill Meteorite KW - thermoluminescence KW - thermal history KW - metamorphism KW - temperature KW - meteorites KW - classification KW - petrography KW - heating KW - chondrites KW - high temperature KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692741618?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Sutter%27s+Mill+Meteorite%3B+thermoluminescence+data+on+thermal+and+metamorphic+history&rft.au=Sears%2C+Derek+W%3BBeauford%2C+Robert%3BJenniskens%2C+Peter&rft.aulast=Sears&rft.aufirst=Derek&rft.date=2014-11-01&rft.volume=49&rft.issue=11&rft.spage=2047&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12259 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 - 32 N1 - PubXState - AR N1 - Document feature - illus. N1 - Last updated - 2015-07-02 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - atmosphere; chondrites; classification; heating; high temperature; metamorphism; meteorites; parent bodies; petrography; stony meteorites; Sutter's Mill Meteorite; temperature; thermal history; thermoluminescence DO - http://dx.doi.org/10.1111/maps.12259 ER - TY - JOUR T1 - Studies of lava flows in the Tharsis region of Mars using SHARAD AN - 1660630194; 2015-021778 AB - The Tharsis region of Mars is covered in volcanic flows that can stretch for tens to hundreds of kilometers. Radar measurements of the dielectric properties of these flows can provide information regarding their composition and density. SHARAD (shallow radar), a sounding radar on the Mars Reconnaissance Orbiter, detects basal interfaces beneath flows in some areas of Tharsis northwest and west of Ascraeus Mons, with additional detections south of Pavonis Mons. Comparisons with 12.6 cm ground-based radar images suggest that SHARAD detects basal interfaces primarily in dust or regolith-mantled regions. We use SHARAD data to estimate the real relative permittivity of the flows by comparing the measured time delay of returns from the subsurface with altimetry measurements of the flow heights relative to the surrounding plains. In cases where the subsurface interface is visible at different depths, spanning tens of meters, it is also possible to measure the loss tangent (tan delta ) of the material. The permittivity values calculated range from 7.6 to 11.6, with an average of 9.6, while the mean loss tangent values range from 7.8 X 10 (super -3) to 2.9 X 10 (super -2) with an average of 1.0 X 10 (super -2) . These permittivity and loss tangent estimates for the flows northwest of Ascraeus Mons, west of Ascraeus Mons, and south of Pavonis Mons are consistent with the lab-measured values for dense, low-titanium basalt. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Simon, Molly N AU - Carter, Lynn M AU - Campbell, Bruce A AU - Phillips, Roger J AU - Mattei, Stefania Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2291 EP - 2299 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 11 SN - 2169-9097, 2169-9097 KW - volcanic rocks KW - lava flows KW - igneous rocks KW - SHARAD KW - Tharsis Montes KW - radar methods KW - Mars Reconnaissance Orbiter KW - Mars KW - altimetry KW - Pavonis Mons KW - terrestrial planets KW - planets KW - dielectric properties KW - Ascraeus Mons KW - volcanism KW - titanium KW - metals KW - basalts KW - orbital observations KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660630194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Studies+of+lava+flows+in+the+Tharsis+region+of+Mars+using+SHARAD&rft.au=Simon%2C+Molly+N%3BCarter%2C+Lynn+M%3BCampbell%2C+Bruce+A%3BPhillips%2C+Roger+J%3BMattei%2C+Stefania&rft.aulast=Simon&rft.aufirst=Molly&rft.date=2014-11-01&rft.volume=119&rft.issue=11&rft.spage=2291&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004666 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 24 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-03-05 N1 - SubjectsTermNotLitGenreText - altimetry; Ascraeus Mons; basalts; dielectric properties; igneous rocks; lava flows; Mars; Mars Reconnaissance Orbiter; metals; orbital observations; Pavonis Mons; planets; radar methods; regolith; SHARAD; terrestrial planets; Tharsis Montes; titanium; volcanic rocks; volcanism DO - http://dx.doi.org/10.1002/2014JE004666 ER - TY - JOUR T1 - The formation of lunar mascon basins from impact to contemporary form AN - 1660629988; 2015-021783 AB - Positive free-air gravity anomalies associated with large lunar impact basins represent a superisostatic mass concentration or "mascon." High-resolution lunar gravity data from the Gravity Recovery and Interior Laboratory spacecraft reveal that these mascons are part of a bulls-eye pattern in which the central positive anomaly is surrounded by an annulus of negative anomalies, which in turn is surrounded by an outer annulus of positive anomalies. To understand the origin of this gravity pattern, we modeled numerically the entire evolution of basin formation from impact to contemporary form. With a hydrocode, we simulated impact excavation and collapse and show that during the major basin-forming era, the preimpact crust and mantle were sufficiently weak to enable a crustal cap to flow back over and cover the mantle exposed by the impact within hours. With hydrocode results as initial conditions, we simulated subsequent cooling and viscoelastic relaxation of topography using a finite element model, focusing on the mare-free Freundlich-Sharonov and mare-infilled Humorum basins. By constraining these models with measured free-air and Bouguer gravity anomalies as well as surface topography, we show that lunar basins evolve by isostatic adjustment from an initially subisostatic state following the collapse stage. The key to the development of a superisostatic inner basin center is its mechanical coupling to the outer basin that rises in response to subisostatic stresses, enabling the inner basin to rise above isostatic equilibrium. Our calculations relate basin size to impactor diameter and velocity, and they constrain the preimpact lunar thermal structure, crustal thickness, viscoelastic rheology, and, for the Humorum basin, the thickness of its postimpact mare fill. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Freed, Andrew M AU - Johnson, Brandon C AU - Blair, David M AU - Melosh, H J AU - Neumann, Gregory A AU - Phillips, Roger J AU - Solomon, Sean C AU - Wieczorek, Mark A AU - Zuber, Maria T Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2378 EP - 2397 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 11 SN - 2169-9097, 2169-9097 KW - numerical models KW - impact features KW - Moon KW - Humorum Basin KW - geophysical methods KW - relaxation KW - satellite methods KW - maria KW - viscoelasticity KW - isostasy KW - gravity methods KW - gravity anomalies KW - finite element analysis KW - mascons KW - rheology KW - surface features KW - Bouguer anomalies KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660629988?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=The+formation+of+lunar+mascon+basins+from+impact+to+contemporary+form&rft.au=Freed%2C+Andrew+M%3BJohnson%2C+Brandon+C%3BBlair%2C+David+M%3BMelosh%2C+H+J%3BNeumann%2C+Gregory+A%3BPhillips%2C+Roger+J%3BSolomon%2C+Sean+C%3BWieczorek%2C+Mark+A%3BZuber%2C+Maria+T&rft.aulast=Freed&rft.aufirst=Andrew&rft.date=2014-11-01&rft.volume=119&rft.issue=11&rft.spage=2378&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004657 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 35 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-03-05 N1 - SubjectsTermNotLitGenreText - Bouguer anomalies; finite element analysis; geophysical methods; gravity anomalies; gravity methods; Humorum Basin; impact features; isostasy; maria; mascons; Moon; numerical models; relaxation; remote sensing; rheology; satellite methods; surface features; viscoelasticity DO - http://dx.doi.org/10.1002/2014JE004657 ER - TY - JOUR T1 - Could giant basin-forming impacts have killed Martian dynamo? AN - 1654666004; 21169493 AB - The observed strong remanent crustal magnetization at the surface of Mars suggests an active dynamo in the past and ceased to exist around early to middle Noachian era, estimated by examining remagnetization strengths in extant and buried impact basins. We investigate whether the Martian dynamo could have been killed by these large basin-forming impacts, via numerical simulation of subcritical dynamos with impact-induced thermal heterogeneity across the core-mantle boundary. We find that subcritical dynamos are prone to the impacts centered on locations within 30 degree of the equator but can easily survive those at higher latitudes. Our results further suggest that magnetic timing places a strong constraint on postimpact polar reorientation, e.g., a minimum 16 degree polar reorientation is needed if Utopia is the dynamo killer. Key Points * Martian dynamo can be terminated by impact-induced thermal heterogeneity * Magnetic field morphology remains intact * Martian dynamo timing places a lower bound on paleopolar reorientation JF - Geophysical Research Letters AU - Kuang, W AU - Jiang, W AU - Roberts, J AU - Frey, H V AD - Planetary Geodynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 8006 EP - 8012 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 41 IS - 22 SN - 0094-8276, 0094-8276 KW - Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Mars magnetic field KW - Simulation Analysis KW - Palaeo studies KW - Basins KW - Mars KW - Paleoclimates KW - Mars surface morphology KW - Magnetic fields KW - Strength KW - Magnetization KW - Numerical simulations KW - Boundaries KW - Heterogeneity KW - Q2 09262:Methods and instruments KW - SW 0810:General KW - M2 523.4:Planets (523.4) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1654666004?accountid=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=Could+giant+basin-forming+impacts+have+killed+Martian+dynamo%3F&rft.au=Kuang%2C+W%3BJiang%2C+W%3BRoberts%2C+J%3BFrey%2C+H+V&rft.aulast=Kuang&rft.aufirst=W&rft.date=2014-11-01&rft.volume=41&rft.issue=22&rft.spage=8006&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL061818 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-02-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Magnetic fields; Palaeo studies; Mars surface morphology; Magnetization; Numerical simulations; Mars magnetic field; Mars; Paleoclimates; Strength; Simulation Analysis; Boundaries; Basins; Heterogeneity DO - http://dx.doi.org/10.1002/2014GL061818 ER - TY - JOUR T1 - Ferrian saponite from the Santa Monica Mountains (California, U.S.A., Earth); characterization as an analog for clay minerals on Mars with application to Yellowknife Bay in Gale Crater AN - 1645574775; 2015-007380 AB - Ferrian saponite from the eastern Santa Monica Mountain, near Griffith Park (Los Angeles, California), was investigated as a mineralogical analog to smectites discovered on Mars by the CheMin X-ray diffraction instrument onboard the Mars Science Laboratory (MSL) rover. The martian clay minerals occur in sediment of basaltic composition and have 02l diffraction bands peaking at 4.59 A, consistent with tri-octahedral smectites. The Griffith saponite occurs in basalts as pseudomorphs after olivine and mesostasis glass and as fillings of vesicles and cracks and has 02l diffraction bands at that same position. We obtained chemical compositions (by electron microprobe), X-ray diffraction patterns with a lab version of the CheMin instrument, Mossbauer spectra, and visible and near-IR reflectance (VNIR) spectra on several samples from that locality. The Griffith saponite is magnesian, Mg/(Mg+Sigma Fe) = 65-70%, lacks tetrahedral Fe (super 3+) and octahedral Al (super 3+) , and has Fe (super 3+) /Sigma Fe from 64 to 93%. Its chemical composition is consistent with a fully tri-octahedral smectite, but the abundance of Fe (super 3+) gives a nominal excess charge of +1 to +2 per formula unit. The excess charge is likely compensated by substitution of O (super 2-) for OH (super -) , causing distortion of octahedral sites as inferred from Mossbauer spectra. We hypothesize that the Griffith saponite was initially deposited with all its iron as Fe (super 2+) and was oxidized later. X-ray diffraction shows a sharp 001 peak at 15 A, 00l peaks, and a 02l diffraction band at the same position (4.59 A) and shape as those of the martian samples, indicating that the martian saponite is not fully oxidized. VNIR spectra of the Griffith saponite show distinct absorptions at 1.40, 1.90, 2.30-2.32, and 2.40 mu m, arising from H (sub 2) O and hydroxyl groups in various settings. The position of the approximately 2.31 mu m spectral feature varies systematically with the redox state of the octahedrally coordinated Fe. This correlation may permit surface oxidation state to be inferred (in some cases) from VNIR spectra of Mars obtained from orbit, and, in any case, ferrian saponite is a viable assignment for spectral detections in the range 2.30-2.32 mu m. JF - American Mineralogist AU - Treiman, Allan H AU - Morris, Richard V AU - Agresti, David G AU - Graff, Trevor G AU - Achilles, Cherie N AU - Rampe, Elizabeth B AU - Bristow, Thomas F AU - Ming, Douglas W AU - Blake, David F AU - Vaniman, David T AU - Bish, David L AU - Chipera, Steve J AU - Morrison, Shaunna M AU - Downs, Robert T Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2234 EP - 2250 PB - Mineralogical Society of America, Washington, DC VL - 99 IS - 11-12 SN - 0003-004X, 0003-004X KW - United States KW - silicates KW - near-infrared spectra KW - X-ray diffraction data KW - Mars KW - crystal structure KW - Gale Crater KW - California KW - Los Angeles California KW - Santa Monica Mountains KW - spectra KW - basaltic composition KW - Mossbauer spectra KW - Yellowknife Bay KW - Los Angeles County California KW - saponite KW - smectite KW - clay minerals KW - terrestrial planets KW - planets KW - Mars Science Laboratory KW - terrestrial comparison KW - sheet silicates KW - Griffith Park KW - crystal chemistry KW - formula KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645574775?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/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=Ferrian+saponite+from+the+Santa+Monica+Mountains+%28California%2C+U.S.A.%2C+Earth%29%3B+characterization+as+an+analog+for+clay+minerals+on+Mars+with+application+to+Yellowknife+Bay+in+Gale+Crater&rft.au=Treiman%2C+Allan+H%3BMorris%2C+Richard+V%3BAgresti%2C+David+G%3BGraff%2C+Trevor+G%3BAchilles%2C+Cherie+N%3BRampe%2C+Elizabeth+B%3BBristow%2C+Thomas+F%3BMing%2C+Douglas+W%3BBlake%2C+David+F%3BVaniman%2C+David+T%3BBish%2C+David+L%3BChipera%2C+Steve+J%3BMorrison%2C+Shaunna+M%3BDowns%2C+Robert+T&rft.aulast=Treiman&rft.aufirst=Allan&rft.date=2014-11-01&rft.volume=99&rft.issue=11-12&rft.spage=2234&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam-2014-4763 L2 - http://www.minsocam.org/MSA/AmMin/TOC/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 87 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-04-16 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - basaltic composition; California; clay minerals; crystal chemistry; crystal structure; formula; Gale Crater; Griffith Park; Los Angeles California; Los Angeles County California; Mars; Mars Science Laboratory; Mossbauer spectra; near-infrared spectra; planets; Santa Monica Mountains; saponite; sheet silicates; silicates; smectite; spectra; terrestrial comparison; terrestrial planets; United States; X-ray diffraction data; Yellowknife Bay DO - http://dx.doi.org/10.2138/am-2014-4763 ER - TY - JOUR T1 - Petrography, geochronology and source terrain characteristics of lunar meteorites Dhofar 925, 961 and Sayh al Uhaymir 449 AN - 1645574153; 2015-004347 AB - Dhofar (Dho) 925, 961 and Sayh al Uhaymir (SaU) 449 are brecciated lunar meteorites consisting of mineral fragments and clasts from a range of precursor lithologies including magnesian anorthositic gabbronorite granulites; crystalline impact melt breccias; clast-bearing glassy impact melt breccias; lithic (fragmental) breccias; mare basalts; and evolved (silica-rich) rocks. On the similarity of clast type and mineral chemistry the samples are likely grouped, and were part of the same parent meteorite. Phosphate Pb-Pb ages in impact melt breccias and matrix grains demonstrate that Dho 961 records geological events spanning approximately 500 Ma between 4.35 and 3.89 Ga. These Pb-Pb ages are similar to the ages of 'ancient' intrusive magmatic samples and impact basin melt products collected on the lunar nearside by the Apollo missions. However, the samples' bulk rock composition is chemically distinct from these types of samples, and it has been suggested that they may have originated from the farside South Pole-Aitken impact basin (i.e., Jolliff et al., 2008). We test this hypothesis, and conclude that although it is possible that the samples may be from the South Pole-Aitken basin, there are other regions on the Moon that may have also sourced these complex breccias. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Joy, K H AU - Nemchin, A AU - Grange, M AU - Lapen, T J AU - Peslier, A H AU - Ross, D K AU - Zolensky, M E AU - Kring, D A Y1 - 2014/11/01/ PY - 2014 DA - 2014 Nov 01 SP - 299 EP - 325 PB - Elsevier, New York, NY VL - 144 SN - 0016-7037, 0016-7037 KW - lunar meteorites KW - stony meteorites KW - impact features KW - mass spectra KW - meteorites KW - BSE data KW - mineral composition KW - Dho 925 KW - major elements KW - dates KW - absolute age KW - Sayh al Uhaymir Meteorites KW - Archean KW - spectra KW - rare earths KW - trace elements KW - chemical composition KW - Dhofar Meteorites KW - Pb/Pb KW - breccia KW - Precambrian KW - Moon KW - textures KW - electron microscopy data KW - cosmochemistry KW - achondrites KW - SaU 449 KW - ICP mass spectra KW - South Pole-Aitken Basin KW - Dho 961 KW - metals KW - SEM data KW - backscattering KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645574153?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Petrography%2C+geochronology+and+source+terrain+characteristics+of+lunar+meteorites+Dhofar+925%2C+961+and+Sayh+al+Uhaymir+449&rft.au=Joy%2C+K+H%3BNemchin%2C+A%3BGrange%2C+M%3BLapen%2C+T+J%3BPeslier%2C+A+H%3BRoss%2C+D+K%3BZolensky%2C+M+E%3BKring%2C+D+A&rft.aulast=Joy&rft.aufirst=K&rft.date=2014-11-01&rft.volume=144&rft.issue=&rft.spage=299&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.08.013 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 - 138 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-04-16 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; Archean; backscattering; breccia; BSE data; chemical composition; cosmochemistry; dates; Dho 925; Dho 961; Dhofar Meteorites; electron microscopy data; ICP mass spectra; impact features; lunar meteorites; major elements; mass spectra; metals; meteorites; mineral composition; Moon; Pb/Pb; Precambrian; rare earths; SaU 449; Sayh al Uhaymir Meteorites; SEM data; South Pole-Aitken Basin; spectra; stony meteorites; textures; trace elements DO - http://dx.doi.org/10.1016/j.gca.2014.08.013 ER - TY - JOUR T1 - Redox-driven exsolution of iron-titanium oxides in magnetite in Miller Range (MIL) 03346 nakhlite; evidence for post crystallization oxidation in the nakhlite cumulate pile? AN - 1645573540; 2015-007387 AB - The Miller Range (MIL) 03346 nakhlite contains approximately 20% mesostasis, which contains skeletal titanomagnetite. The titanomagnetite contains trellis-type {111} lamellae of ilmenite similar to those found in terrestrial titanomagnetites that have experienced subsolidus redox reactions during cooling of their host rocks. We have characterized the MIL 03346 titanomagnetite-ilmenite intergrowths by a combination of focused ion beam (FIB), energy-dispersive spectroscopy (EDX), and high-resolution transmission electron microscopy (TEM). The resulting structural and chemical analyses have been combined with temperature and f (sub O2) data from previous studies of MIL 03346, as well as previous work on two-oxide thermobarometry of nakhlites. Our calculations show that as MIL 03346 and other nakhlites cooled below 800 degrees C, they recorded increasingly reducing conditions, such that the lowest temperatures calculated correspond to f (sub O2) conditions as low as 4 log f (sub O2) units below the FMQ buffer. However, the MIL 03346 lamellae must have formed by oxidation and thus record a very late stage low-temperature (<350 degrees C) oxidation event. When considered together with previous studies of MIL 03346 and nakhlites in general, the overall cooling history could be explained by early oxidation followed by intermediate stage reduction caused by S (sub 2) loss by degassing, followed by late loss of Cl by degassing. JF - American Mineralogist AU - Righter, Kevin AU - Keller, Lindsay P AU - Rahman, Zia AU - Christoffersen, Roy Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2313 EP - 2319 PB - Mineralogical Society of America, Washington, DC VL - 99 IS - 11-12 SN - 0003-004X, 0003-004X KW - ilmenite KW - nakhlite KW - geologic thermometry KW - stony meteorites KW - oxygen KW - iron oxides KW - Martian meteorites KW - buffers KW - halogens KW - lamellae KW - temperature KW - SNC Meteorites KW - meteorites KW - oxides KW - spectra KW - Eh KW - titanomaghemite KW - degassing KW - Miller Range Meteorites KW - chlorine KW - high-resolution methods KW - oxidation KW - mass spectroscopy KW - intergrowths KW - achondrites KW - TEM data KW - ion probe KW - Antarctica KW - crystallization KW - exsolution KW - spectroscopy KW - magnetite KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645573540?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/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=Redox-driven+exsolution+of+iron-titanium+oxides+in+magnetite+in+Miller+Range+%28MIL%29+03346+nakhlite%3B+evidence+for+post+crystallization+oxidation+in+the+nakhlite+cumulate+pile%3F&rft.au=Righter%2C+Kevin%3BKeller%2C+Lindsay+P%3BRahman%2C+Zia%3BChristoffersen%2C+Roy&rft.aulast=Righter&rft.aufirst=Kevin&rft.date=2014-11-01&rft.volume=99&rft.issue=11-12&rft.spage=2313&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam-2014-4926 L2 - http://www.minsocam.org/MSA/AmMin/TOC/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 42 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-01-15 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - achondrites; Antarctica; buffers; chlorine; crystallization; degassing; Eh; exsolution; geologic thermometry; halogens; high-resolution methods; ilmenite; intergrowths; ion probe; iron oxides; lamellae; magnetite; Martian meteorites; mass spectroscopy; meteorites; Miller Range Meteorites; nakhlite; oxidation; oxides; oxygen; SNC Meteorites; spectra; spectroscopy; stony meteorites; TEM data; temperature; titanomaghemite DO - http://dx.doi.org/10.2138/am-2014-4926 ER - TY - JOUR T1 - Global warming and 21 super(st) century drying AN - 1627984914; 20926504 AB - Global warming is expected to increase the frequency and intensity of droughts in the twenty-first century, but the relative contributions from changes in moisture supply (precipitation) versus evaporative demand (potential evapotranspiration; PET) have not been comprehensively assessed. Using output from a suite of general circulation model (GCM) simulations from phase 5 of the Coupled Model Intercomparison Project, projected twenty-first century drying and wetting trends are investigated using two offline indices of surface moisture balance: the Palmer Drought Severity Index (PDSI) and the Standardized Precipitation Evapotranspiration Index (SPEI). PDSI and SPEI projections using precipitation and Penman-Monteith based PET changes from the GCMs generally agree, showing robust cross-model drying in western North America, Central America, the Mediterranean, southern Africa, and the Amazon and robust wetting occurring in the Northern Hemisphere high latitudes and east Africa (PDSI only). The SPEI is more sensitive to PET changes than the PDSI, especially in arid regions such as the Sahara and Middle East. Regional drying and wetting patterns largely mirror the spatially heterogeneous response of precipitation in the models, although drying in the PDSI and SPEI calculations extends beyond the regions of reduced precipitation. This expansion of drying areas is attributed to globally widespread increases in PET, caused by increases in surface net radiation and the vapor pressure deficit. Increased PET not only intensifies drying in areas where precipitation is already reduced, it also drives areas into drought that would otherwise experience little drying or even wetting from precipitation trends alone. This PET amplification effect is largest in the Northern Hemisphere mid-latitudes, and is especially pronounced in western North America, Europe, and southeast China. Compared to PDSI projections using precipitation changes only, the projections incorporating both precipitation and PET changes increase the percentage of global land area projected to experience at least moderate drying (PDSI standard deviation of less than or equal to -1) by the end of the twenty-first century from 12 to 30 %. PET induced moderate drying is even more severe in the SPEI projections (SPEI standard deviation of less than or equal to -1; 11 to 44 %), although this is likely less meaningful because much of the PET induced drying in the SPEI occurs in the aforementioned arid regions. Integrated accounting of both the supply and demand sides of the surface moisture balance is therefore critical for characterizing the full range of projected drought risks tied to increasing greenhouse gases and associated warming of the climate system. JF - Climate Dynamics AU - Cook, Benjamin I AU - Smerdon, Jason E AU - Seager, Richard AU - Coats, Sloan AD - NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY, 10025, USA, benjamin.i.cook@nasa.gov Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2607 EP - 2627 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 43 IS - 9-10 SN - 0930-7575, 0930-7575 KW - Water Resources Abstracts; Aqualine Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources; Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts KW - Moisture KW - Rainfall KW - Arid environments KW - Atmospheric circulation-oceanic circulation coupled models KW - Potential evapotranspiration KW - Radiation KW - Droughts KW - Middle East KW - North America KW - MED, Western Mediterranean KW - Atmospheric circulation KW - Greenhouse effect KW - Projections KW - Global Warming KW - Model Studies KW - ASE, Africa KW - Numerical simulations KW - General circulation models KW - Africa KW - Standards KW - Greenhouse gases KW - Vapor pressure KW - Net radiation KW - Ecological distribution KW - Climate change KW - Drought KW - ASW, Central America KW - Wetting KW - ANE, Europe KW - Latitude KW - Precipitation trends KW - Climates KW - Radiation balance KW - Simulation KW - Drying KW - Evapotranspiration KW - Precipitation KW - Accounting KW - PSW, Africa KW - South America, Amazon R. KW - Global warming KW - China, People's Rep. KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 5010:Network design KW - Q5 08503:Characteristics, behavior and fate KW - AQ 00006:Sewage KW - M3 1010:Issues in Sustainable Development KW - M2 556.13:Evaporation/Evapotranspiration (556.13) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627984914?accountid=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=Global+warming+and+21+super%28st%29+century+drying&rft.au=Cook%2C+Benjamin+I%3BSmerdon%2C+Jason+E%3BSeager%2C+Richard%3BCoats%2C+Sloan&rft.aulast=Cook&rft.aufirst=Benjamin&rft.date=2014-11-01&rft.volume=43&rft.issue=9-10&rft.spage=2607&rft.isbn=&rft.btitle=&rft.title=Climate+Dynamics&rft.issn=09307575&rft_id=info:doi/10.1007%2Fs00382-014-2075-y LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Number of references - 75 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Ecological distribution; Radiation balance; Climate change; Drying; Evapotranspiration; Greenhouse effect; Atmospheric circulation; Droughts; Potential evapotranspiration; Net radiation; Numerical simulations; Precipitation trends; General circulation models; Global warming; Drought; Precipitation; Atmospheric circulation-oceanic circulation coupled models; Greenhouse gases; Vapor pressure; Rainfall; Arid environments; Simulation; Accounting; Radiation; Latitude; Standards; Moisture; Wetting; Climates; Projections; Global Warming; Model Studies; North America; ASE, Africa; MED, Western Mediterranean; South America, Amazon R.; ANE, Europe; Africa; China, People's Rep.; ASW, Central America; PSW, Africa; Middle East DO - http://dx.doi.org/10.1007/s00382-014-2075-y ER - TY - JOUR T1 - An assessment of the ENSO forecast skill of GEOS-5 system AN - 1627984560; 20926495 AB - The seasonal forecast skill of the NASA Global Modeling and Assimilation Office atmosphere-ocean coupled global climate model (AOGCM) is evaluated based on an ensemble of 9-month lead forecasts for the period 1993 to 2010. The results from the current version (V2) of the AOGCM consisting of the GEOS-5 AGCM coupled to the MOM4 ocean model are compared with those from an earlier version (V1) in which the AGCM (the NSIPP model) was coupled to the Poseidon Ocean Model. It was found that the correlation skill of the Sea Surface Temperature (SST) forecasts is generally better in V2, especially over the sub-tropical and tropical central and eastern Pacific, Atlantic, and Indian Ocean. Furthermore, the improvement in skill in V2 mainly comes from better forecasts of the developing phase of ENSO from boreal spring to summer. The skill of ENSO forecasts initiated during the boreal winter season, however, shows no improvement in terms of correlation skill, and is in fact slightly worse in terms of root mean square error (RMSE). The degradation of skill is found to be due to an excessive ENSO amplitude. For V1, the ENSO amplitude is too strong in forecasts starting in boreal spring and summer, which causes large RMSE in the forecast. For V2, the ENSO amplitude is slightly stronger than that in observations and V1 for forecasts starting in boreal winter season. An analysis of the terms in the SST tendency equation, shows that this is mainly due to an excessive zonal advective feedback. In addition, V2 forecasts that are initiated during boreal winter season, exhibit a slower phase transition of El Nino, which is consistent with larger amplitude of ENSO after the ENSO peak season. It is found that this is due to weak discharge of equatorial Warm Water Volume (WWV). In both observations and V1, the discharge of equatorial WWV leads the equatorial geostrophic easterly current so as to damp the El Nino starting in January. This process is delayed by about 2 months in V2 due to the slower phase transition of the equatorial zonal current from westerly to easterly. JF - Climate Dynamics AU - Ham, Yoo-Geun AU - Schubert, Siegfried AU - Vikhliaev, Yury AU - Suarez, Max J AD - Global Modeling and Assimilation Office, GSFC/NASA, Greenbelt, MD, USA, ygham@jnu.ac.kr Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2415 EP - 2430 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 43 IS - 9-10 SN - 0930-7575, 0930-7575 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Degradation KW - Ocean models KW - Correlations KW - Westerlies KW - Roots KW - Freshwater KW - Atmospheric circulation-oceanic circulation coupled models KW - Data assimilation KW - Lead KW - Assessments KW - El Nino KW - Ocean-atmosphere system KW - Seasonal variability KW - Sea surface temperature forecasting KW - El Nino phenomena KW - Marine KW - ISW, Indian Ocean KW - Climate models KW - Climates KW - River discharge KW - Seasonal forecasts KW - Ocean circulation KW - Errors KW - Model Studies KW - Southern Oscillation KW - Ocean currents KW - Global climate KW - Satellite sensing KW - Atmosphere-ocean coupled models KW - Oceans KW - El Nino-Southern Oscillation event KW - SW 0810:General KW - M2 551.588:Environmental Influences (551.588) KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627984560?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+Dynamics&rft.atitle=An+assessment+of+the+ENSO+forecast+skill+of+GEOS-5+system&rft.au=Ham%2C+Yoo-Geun%3BSchubert%2C+Siegfried%3BVikhliaev%2C+Yury%3BSuarez%2C+Max+J&rft.aulast=Ham&rft.aufirst=Yoo-Geun&rft.date=2014-11-01&rft.volume=43&rft.issue=9-10&rft.spage=2415&rft.isbn=&rft.btitle=&rft.title=Climate+Dynamics&rft.issn=09307575&rft_id=info:doi/10.1007%2Fs00382-014-2063-2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Number of references - 53 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Satellite sensing; El Nino; Westerlies; River discharge; Ocean-atmosphere system; Ocean circulation; Lead; El Nino phenomena; Southern Oscillation; Climate models; Ocean models; Correlations; Seasonal forecasts; Atmospheric circulation-oceanic circulation coupled models; Data assimilation; Ocean currents; Global climate; Atmosphere-ocean coupled models; El Nino-Southern Oscillation event; Seasonal variability; Sea surface temperature forecasting; Degradation; Assessments; Oceans; Climates; Roots; Errors; Model Studies; ISW, Indian Ocean; Marine; Freshwater DO - http://dx.doi.org/10.1007/s00382-014-2063-2 ER - TY - JOUR T1 - Early-phase musculoskeletal adaptations to different levels of eccentric resistance after 8 weeks of lower body training AN - 1622608748; 20873281 AB - Purpose: Eccentric muscle actions are important to the development of muscle mass and strength and may affect bone mineral density (BMD). This study's purpose was to determine the relative effectiveness of five different eccentric:concentric load ratios to increase musculoskeletal parameters during early adaptations to resistance training. Methods: Forty male subjects performed a supine leg press and calf press training program 3 days week super(-1) for 8 weeks. Subjects were matched for pre-training leg press 1-repetition maximum strength (1-RM) and randomly assigned to one of five training groups. Concentric training load (% 1-RM) was constant across groups, but within groups, eccentric load was 0, 33, 66, 100, or 138 % of concentric load. Muscle mass (dual energy X-ray absorptiometry; DXA), strength (1-RM), and BMD (DXA) were measured pre- and post-training. Markers of bone metabolism were assessed pre-, mid- and post-training. Results: The increase in leg press 1-RM in the 138 % group (20 plus or minus 4 %) was significantly greater (P < 0.05) than the 0 % (8 plus or minus 3 %), 33 % (8 plus or minus 5 %) and 66 % (8 plus or minus 4 %) groups, but not the 100 % group (13 plus or minus 6 %; P = 0.15). All groups, except the 0 % group, increased calf press 1-RM (P < 0.05). Leg lean mass and greater trochanter BMD were increased only in the 138 % group (P < 0.05). Conclusions: Early-phase adaptations to eccentric overload training include increases in muscle mass and site-specific increases in BMD and muscle strength which are not present or are less with traditional and eccentric underload training. Eccentric overload provides a robust musculoskeletal stimulus that may benefit bedridden patients, individuals recovering from injury or illness, and astronauts during spaceflight. JF - European Journal of Applied Physiology AU - English, Kirk L AU - Loehr, James A AU - Lee, Stuart MC AU - Smith, Scott M AD - JES Tech, LLC, 16870 Royal Crest Dr., Houston, TX, 77058, USA, kirk.english-1@nasa.gov Y1 - 2014/11// PY - 2014 DA - Nov 2014 SP - 2263 EP - 2280 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 114 IS - 11 SN - 1439-6319, 1439-6319 KW - Physical Education Index KW - Muscles (size) KW - Bone mineral density KW - Bones KW - Training (programs) KW - Legs KW - Work load KW - Strength (training) KW - Metabolism KW - PE 030:Exercise, Health & Physical Fitness UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622608748?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aphysicaleducation&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=European+Journal+of+Applied+Physiology&rft.atitle=Early-phase+musculoskeletal+adaptations+to+different+levels+of+eccentric+resistance+after+8+weeks+of+lower+body+training&rft.au=English%2C+Kirk+L%3BLoehr%2C+James+A%3BLee%2C+Stuart+MC%3BSmith%2C+Scott+M&rft.aulast=English&rft.aufirst=Kirk&rft.date=2014-11-01&rft.volume=114&rft.issue=11&rft.spage=2263&rft.isbn=&rft.btitle=&rft.title=European+Journal+of+Applied+Physiology&rft.issn=14396319&rft_id=info:doi/10.1007%2Fs00421-014-2951-5 LA - English DB - Physical Education Index N1 - Date revised - 2014-11-01 N1 - Number of references - 112 N1 - Last updated - 2014-11-12 N1 - SubjectsTermNotLitGenreText - Bones; Bone mineral density; Muscles (size); Training (programs); Work load; Legs; Metabolism; Strength (training) DO - http://dx.doi.org/10.1007/s00421-014-2951-5 ER - TY - JOUR T1 - BAT2 and BAT3 polymorphisms as novel genetic risk factors for rejection after HLA-related SCT AN - 1620028381; 25111513; 25369760 AB - The genetic background of donor and recipient is an important factor determining the outcome of allogeneic hematopoietic SCT (allo-HSCT). We applied whole-genome analysis to investigate genetic variants-other than HLA class I and II-associated with negative outcome after HLA-identical sibling allo-HSCT in a cohort of 110 [beta]-Thalassemic patients. We identified two single-nucleotide polymorphisms (SNPs) in BAT2 (A/G) and BAT3 (T/C) genes, SNP rs11538264 and SNP rs10484558, both located in the HLA class III region, in strong linkage disequilibrium between each other (R(2)=0.92). When considered as single SNP, none of them reached a significant association with graft rejection (nominal P<0.00001 for BAT2 SNP rs11538264, and P<0.0001 for BAT3 SNP rs10484558), whereas the BAT2/BAT3 A/C haplotype was present at significantly higher frequency in patients who rejected as compared to those with functional graft (30.0% vs 2.6%, nominal P=1.15 × 10(-8); and adjusted P=0.0071). The BAT2/BAT3 polymorphisms and specifically the A/C haplotype may represent a novel immunogenetic factor associated with graft rejection in patients undergoing allo-HSCT. JF - Bone Marrow Transplantation AU - Piras, I S AU - Angius, A AU - Andreani, M AU - Testi, M AU - Lucarelli, G AU - Floris, M AU - Marktel, S AU - Ciceri, F AU - Nasa, G La AU - Fleischhauer, K AU - Roncarolo, M G AU - Bulfone, A AU - Gregori, S AU - Bacchetta, R Y1 - 2014/11// PY - 2014 DA - Nov 2014 SP - 1400 EP - 4 CY - London PB - Nature Publishing Group VL - 49 IS - 11 SN - 02683369 KW - Medical Sciences--Experimental Medicine, Laboratory Technique UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1620028381?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthcompleteshell&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bone+Marrow+Transplantation&rft.atitle=BAT2+and+BAT3+polymorphisms+as+novel+genetic+risk+factors+for+rejection+after+HLA-related+SCT&rft.au=Piras%2C+I+S%3BAngius%2C+A%3BAndreani%2C+M%3BTesti%2C+M%3BLucarelli%2C+G%3BFloris%2C+M%3BMarktel%2C+S%3BCiceri%2C+F%3BNasa%2C+G+La%3BFleischhauer%2C+K%3BRoncarolo%2C+M+G%3BBulfone%2C+A%3BGregori%2C+S%3BBacchetta%2C+R&rft.aulast=Piras&rft.aufirst=I&rft.date=2014-11-01&rft.volume=49&rft.issue=11&rft.spage=1400&rft.isbn=&rft.btitle=&rft.title=Bone+Marrow+Transplantation&rft.issn=02683369&rft_id=info:doi/10.1038%2Fbmt.2014.177 LA - English DB - ProQuest Central N1 - Copyright - Copyright Nature Publishing Group Nov 2014 N1 - Last updated - 2014-11-13 DO - http://dx.doi.org/10.1038/bmt.2014.177 ER - TY - JOUR T1 - The worst North American drought year of the last millennium; 1934 AN - 1707521194; 2015-083706 AB - During the summer of 1934, over 70% of western North America experienced extreme drought, placing this summer far outside the normal range of drought variability and making 1934 the single worst drought year of the last millennium. Strong atmospheric ridging along the West Coast suppressed cold season precipitation across the Northwest, Southwest, and California, a circulation pattern similar to the winters of 1976-1977 and 2013-2014. In the spring and summer, the drying spread to the Midwest and Central Plains, driven by severe precipitation deficits downwind from regions of major dust storm activity, consistent with previous work linking drying during the Dust Bowl to anthropogenic dust aerosol forcing. Despite a moderate La Nina, contributions from sea surface temperature forcing were small, suggesting that the anomalous 1934 drought was primarily a consequence of atmospheric variability, possibly amplified by dust forcing that intensified and spread the drought across nearly all of western North America. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Cook, Benjamin I AU - Seager, Richard AU - Smerdon, Jason E Y1 - 2014/10/28/ PY - 2014 DA - 2014 Oct 28 SP - 7298 EP - 7305 PB - American Geophysical Union, Washington, DC VL - 41 IS - 20 SN - 0094-8276, 0094-8276 KW - United States KW - dust storms KW - North America KW - clastic sediments KW - atmospheric precipitation KW - climate change KW - drought KW - atmospheric circulation KW - Canada KW - transport KW - dust KW - sediments KW - seasonal variations KW - wind transport KW - meteorology KW - winds KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707521194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=The+worst+North+American+drought+year+of+the+last+millennium%3B+1934&rft.au=Cook%2C+Benjamin+I%3BSeager%2C+Richard%3BSmerdon%2C+Jason+E&rft.aulast=Cook&rft.aufirst=Benjamin&rft.date=2014-10-28&rft.volume=41&rft.issue=20&rft.spage=7298&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL061661 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. incl. sketch maps N1 - Last updated - 2015-08-27 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - atmospheric circulation; atmospheric precipitation; Canada; clastic sediments; climate change; drought; dust; dust storms; meteorology; North America; seasonal variations; sediments; transport; United States; wind transport; winds DO - http://dx.doi.org/10.1002/2014GL061661 ER - TY - JOUR T1 - Constraints on the recent rate of lunar ejecta breakdown and implications for crater ages AN - 1637532594; 2014-102344 AB - We present a new empirical constraint on the rate of breakdown of large ejecta blocks on the Moon based on observations from the Lunar Reconnaissance Orbiter (LRO) Diviner thermal radiometer. We find that the rockiness of fresh crater ejecta can be quantified using the Diviner-derived rock abundance data set, and we present a strong inverse correlation between the 95 (super th) percentile value of the ejecta rock abundance (RA (sub 95/5) ) and crater age. For nine craters with published model ages derived from crater counts on their continuous ejecta, RA (sub 95/5) decreases with crater age, as (age [m.y.]) (super -0.46) . This result implies shorter rock survival times than predicted based on downward extrapolation of 100 m crater size-frequency distributions, and represents a new empirical constraint on the rate of comminution of large rocks not previously analyzed experimentally or through direct observation. In addition, our result provides a new method for dating young lunar craters. JF - Geology (Boulder) AU - Ghent, Rebecca R AU - Hayne, Paul O AU - Bandfield, Joshua L AU - Campbell, Bruce A AU - Allen, Carlton C AU - Carter, Lynn M AU - Paige, David A Y1 - 2014/10/24/ PY - 2014 DA - 2014 Oct 24 SP - 1059 EP - 1062 PB - Geological Society of America (GSA), Boulder, CO VL - 42 IS - 12 SN - 0091-7613, 0091-7613 KW - relative age KW - Moon KW - statistical analysis KW - rates KW - satellite methods KW - ejecta KW - regression analysis KW - regolith KW - lunar craters KW - remote sensing KW - Lunar Reconnaisance Orbiter KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637532594?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Constraints+on+the+recent+rate+of+lunar+ejecta+breakdown+and+implications+for+crater+ages&rft.au=Ghent%2C+Rebecca+R%3BHayne%2C+Paul+O%3BBandfield%2C+Joshua+L%3BCampbell%2C+Bruce+A%3BAllen%2C+Carlton+C%3BCarter%2C+Lynn+M%3BPaige%2C+David+A&rft.aulast=Ghent&rft.aufirst=Rebecca&rft.date=2014-10-24&rft.volume=42&rft.issue=12&rft.spage=1059&rft.isbn=&rft.btitle=&rft.title=Geology+%28Boulder%29&rft.issn=00917613&rft_id=info:doi/10.1130%2FG35926.1 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 - 25 N1 - PubXState - CO N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-12-18 N1 - CODEN - GLGYBA N1 - SubjectsTermNotLitGenreText - ejecta; lunar craters; Lunar Reconnaisance Orbiter; Moon; rates; regolith; regression analysis; relative age; remote sensing; satellite methods; statistical analysis DO - http://dx.doi.org/10.1130/G35926.1 ER - TY - CPAPER T1 - Curiosity on Mars - Inspiring the Young Generation T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645183860; 6318255 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Tavernier, Lyle 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/1645183860?accountid=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=Curiosity+on+Mars+-+Inspiring+the+Young+Generation&rft.au=Tavernier%2C+Lyle&rft.aulast=Tavernier&rft.aufirst=Lyle&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 - Implications of Erosion Rates for Mars Climate T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645183786; 6318744 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Golombek, M AU - Warner, N AU - Ganti, V AU - Lamb, M Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Erosion KW - Climate UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645183786?accountid=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=Implications+of+Erosion+Rates+for+Mars+Climate&rft.au=Golombek%2C+M%3BWarner%2C+N%3BGanti%2C+V%3BLamb%2C+M&rft.aulast=Golombek&rft.aufirst=M&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 - Long Term Orbital Observations of the World'S Active Volcanoes with the Aster Volcano Archive: The Challenges and Opportunities of a 100tb Data Set T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645183752; 6318197 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Pieri, David AU - Linick, Justin Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Data processing KW - Volcanoes KW - Archives KW - Aster UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645183752?accountid=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=Long+Term+Orbital+Observations+of+the+World%27S+Active+Volcanoes+with+the+Aster+Volcano+Archive%3A+The+Challenges+and+Opportunities+of+a+100tb+Data+Set&rft.au=Pieri%2C+David%3BLinick%2C+Justin&rft.aulast=Pieri&rft.aufirst=David&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 - A Marine Origin for the Opportunity Landing Site in Meridiani Planum T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645183729; 6318745 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Parker, Timothy AU - Bills, Bruce AU - Grant, John Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Landing statistics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645183729?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+Geological+Society+of+America+%28GSA+2014%29&rft.atitle=A+Marine+Origin+for+the+Opportunity+Landing+Site+in+Meridiani+Planum&rft.au=Parker%2C+Timothy%3BBills%2C+Bruce%3BGrant%2C+John&rft.aulast=Parker&rft.aufirst=Timothy&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 - Heterotrophic Bacterial Alkaline Phosphatases Determined C/N/P Ratios in Devonian Black Shales T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645176728; 6317114 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Tuite Jr, Michael Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Alkaline phosphatase KW - Devonian KW - Shale KW - Phosphatase UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645176728?accountid=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=Heterotrophic+Bacterial+Alkaline+Phosphatases+Determined+C%2FN%2FP+Ratios+in+Devonian+Black+Shales&rft.au=Tuite+Jr%2C+Michael&rft.aulast=Tuite+Jr&rft.aufirst=Michael&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 - Enceladus'S Diverse Ridge Terrains T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645168756; 6316843 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Patthoff, D AU - Pappalardo, Robert AU - Chilton, Heather AU - Thomas, Peter Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Ridges UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645168756?accountid=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=Enceladus%27S+Diverse+Ridge+Terrains&rft.au=Patthoff%2C+D%3BPappalardo%2C+Robert%3BChilton%2C+Heather%3BThomas%2C+Peter&rft.aulast=Patthoff&rft.aufirst=D&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 - Labyrinth Terrain on Titan T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645168520; 6316839 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Malaska, Michael AU - Radebaugh, Jani AU - Lopes, Rosaly AU - Mitchell, Karl AU - Hayes, Alexander AU - Le Gall, Alice AU - Turtle, Elizabeth AU - Solomonidou, Anezina AU - Lorenz, Ralph 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/1645168520?accountid=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=Labyrinth+Terrain+on+Titan&rft.au=Malaska%2C+Michael%3BRadebaugh%2C+Jani%3BLopes%2C+Rosaly%3BMitchell%2C+Karl%3BHayes%2C+Alexander%3BLe+Gall%2C+Alice%3BTurtle%2C+Elizabeth%3BSolomonidou%2C+Anezina%3BLorenz%2C+Ralph&rft.aulast=Malaska&rft.aufirst=Michael&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 - Ridge and Trough Terrains on Icy Worlds T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645165959; 6316842 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Pappalardo, Robert Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Ridges UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645165959?accountid=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=Ridge+and+Trough+Terrains+on+Icy+Worlds&rft.au=Pappalardo%2C+Robert&rft.aulast=Pappalardo&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 - CPAPER T1 - Unraveling the Spatial and Temporal Histories of Faults Associated with the Claritas Rise Region, Mars T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645165786; 6316479 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Anderson, Robert AU - Dohm, James AU - Buczkowski, Debra AU - Wyrick, Danielle Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - Historical account UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645165786?accountid=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=Unraveling+the+Spatial+and+Temporal+Histories+of+Faults+Associated+with+the+Claritas+Rise+Region%2C+Mars&rft.au=Anderson%2C+Robert%3BDohm%2C+James%3BBuczkowski%2C+Debra%3BWyrick%2C+Danielle&rft.aulast=Anderson&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 - CPAPER T1 - Curiosity Connections with Pre-College Robotics Competitions T2 - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AN - 1645159126; 6318260 JF - 2014 Annual Meeting of the Geological Society of America (GSA 2014) AU - Brinza, David AU - Steele, Robert AU - Leon, Mark AU - Lavery, David Y1 - 2014/10/19/ PY - 2014 DA - 2014 Oct 19 KW - robotics KW - Competition UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645159126?accountid=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=Curiosity+Connections+with+Pre-College+Robotics+Competitions&rft.au=Brinza%2C+David%3BSteele%2C+Robert%3BLeon%2C+Mark%3BLavery%2C+David&rft.aulast=Brinza&rft.aufirst=David&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 - Sensing biodiversity AN - 1827932651; PQ0003451427 AB - Biodiversity loss is a global change with consequences that may exceed those of climate change (1). Yet, limited data on key aspects of biodiversity continue to constrain conservation efforts. Effective biodiversity conservation will require rapidly increasing understanding of the elements of biodiversity (such as the condition of ecosystems or the number and identities of species) and how they are changing through time. Satellite and airborne remote sensing are key to this effort but will only achieve their conservation potential when networked with in situ sensors (see the figure). JF - Science AU - Turner, Woody AD - Earth Science Division, NASA Headquarters, Washington, DC 20546-0001, USA Y1 - 2014/10/17/ PY - 2014 DA - 2014 Oct 17 SP - 301 EP - 302 PB - American Association for the Advancement of Science, 1200 New York Avenue, NW Washington DC 20005 United States VL - 346 IS - 6207 SN - 0036-8075, 0036-8075 KW - Ecology Abstracts KW - Data processing KW - Climatic changes KW - Remote sensing KW - Biodiversity KW - Conservation KW - Satellites KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1827932651?accountid=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=Science&rft.atitle=Sensing+biodiversity&rft.au=Turner%2C+Woody&rft.aulast=Turner&rft.aufirst=Woody&rft.date=2014-10-17&rft.volume=346&rft.issue=6207&rft.spage=301&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1256014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Last updated - 2016-10-12 N1 - SubjectsTermNotLitGenreText - Data processing; Climatic changes; Remote sensing; Conservation; Biodiversity; Satellites DO - http://dx.doi.org/10.1126/science.1256014 ER - TY - CPAPER T1 - Effective dispersion of boron nitride nanotubes T2 - 66th Southeastern Regional Meeting of the American Chemical Society (SERMACS 2014) AN - 1645173418; 6325086 JF - 66th Southeastern Regional Meeting of the American Chemical Society (SERMACS 2014) AU - Tiano, Amanda AU - Gibbons, Luke AU - Tsui, Michelle AU - Park, Cheol AU - Fay, Catharine Y1 - 2014/10/16/ PY - 2014 DA - 2014 Oct 16 KW - nanotubes KW - Boron KW - Dispersion KW - Nanotechnology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645173418?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=66th+Southeastern+Regional+Meeting+of+the+American+Chemical+Society+%28SERMACS+2014%29&rft.atitle=Effective+dispersion+of+boron+nitride+nanotubes&rft.au=Tiano%2C+Amanda%3BGibbons%2C+Luke%3BTsui%2C+Michelle%3BPark%2C+Cheol%3BFay%2C+Catharine&rft.aulast=Tiano&rft.aufirst=Amanda&rft.date=2014-10-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=66th+Southeastern+Regional+Meeting+of+the+American+Chemical+Society+%28SERMACS+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://abstracts.acs.org/chem/sermacs2014/program/divisionindex.php?act=session&val=289700&prog=289700 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - JOUR T1 - Constraints on the secular variation of Mercury's magnetic field from the combined analysis of MESSENGER and Mariner 10 data AN - 1629947765; 2014-097271 AB - Observations of Mercury's internal magnetic field from the Magnetometer on the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft have revealed a dipole moment of 190 nT R (sub M) (super 3) offset about 480 km northward from the planetary equator, where R (sub M) is Mercury's radius. We have reanalyzed magnetic field observations acquired by the Mariner 10 spacecraft during its third flyby of Mercury (M10-III) in 1975 to constrain the secular variation in the internal field over the past 40 years. With the application of techniques developed in the analysis of MESSENGER data, we find that the dipole moment that best fits the M10-III data is 188 nT R (sub M) (super 3) offset 475 km northward from the equator. Our results are consistent with no secular variation, although variations of up to 10%, 16%, and 35%, respectively, are permitted in the zonal coefficients g (sub 1) (super 0) , g (sub 2) (super 0) , and g (sub 3) (super 0) in a spherical harmonic expansion of the internal field. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Philpott, Lydia C AU - Johnson, Catherine L AU - Winslow, Reka M AU - Anderson, Brian J AU - Korth, Haje AU - Purucker, Michael E AU - Solomon, Sean C Y1 - 2014/10/16/ PY - 2014 DA - 2014 Oct 16 SP - 6627 EP - 6634 PB - American Geophysical Union, Washington, DC VL - 41 IS - 19 SN - 0094-8276, 0094-8276 KW - terrestrial planets KW - spherical harmonic analysis KW - Messenger Mission KW - planets KW - secular variations KW - Mercury Planet KW - Mariner Program KW - Mariner 10 KW - paleomagnetism KW - magnetic field KW - dipole moment KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629947765?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Constraints+on+the+secular+variation+of+Mercury%27s+magnetic+field+from+the+combined+analysis+of+MESSENGER+and+Mariner+10+data&rft.au=Philpott%2C+Lydia+C%3BJohnson%2C+Catherine+L%3BWinslow%2C+Reka+M%3BAnderson%2C+Brian+J%3BKorth%2C+Haje%3BPurucker%2C+Michael+E%3BSolomon%2C+Sean+C&rft.aulast=Philpott&rft.aufirst=Lydia&rft.date=2014-10-16&rft.volume=41&rft.issue=19&rft.spage=6627&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL061401 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 27 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-12-04 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - dipole moment; magnetic field; Mariner 10; Mariner Program; Mercury Planet; Messenger Mission; paleomagnetism; planets; secular variations; spherical harmonic analysis; terrestrial planets DO - http://dx.doi.org/10.1002/2014GL061401 ER - TY - JOUR T1 - Images of surface volatiles in Mercury's polar craters acquired by the MESSENGER spacecraft AN - 1637532742; 2014-102332 AB - Images acquired by NASA's MESSENGER spacecraft haverevealed the morphology of frozen volatiles in Mercury's permanentlyshadowed polar craters and provide insight into the mode of emplacementand evolution of the polar deposits. The images show extensive,spatially continuous regions with distinctive reflectance properties. Asite within Prokofiev crater identified as containing widespread surfacewater ice exhibits a cratered texture that resembles the neighboringsunlit surface except for its uniformly higher reflectance, indicatingthat the surficial ice was emplaced after formation of the underlyingcraters. In areas where water ice is inferred to be present but coveredby a thin layer of dark, organic-rich volatile material, regions withuniformly lower reflectance extend to the edges of the shadowed areasand terminate with sharp boundaries. The sharp boundaries indicatethat the volatile deposits at Mercury's poles are geologically young,relative to the time scale for lateral mixing by impacts, and either arerestored at the surface through an ongoing process or were deliveredto the planet recently. JF - Geology (Boulder) AU - Chabot, Nancy L AU - Ernst, Carolyn M AU - Denevi, Brett W AU - Nair, Hari AU - Deutsch, Ariel N AU - Blewett, David T AU - Murchie, Scott L AU - Neumann, Gregory A AU - Mazarico, Erwan AU - Paige, David A AU - Harmon, John K AU - Head, James W AU - Solomon, Sean C Y1 - 2014/10/15/ PY - 2014 DA - 2014 Oct 15 SP - 1051 EP - 1054 PB - Geological Society of America (GSA), Boulder, CO VL - 42 IS - 12 SN - 0091-7613, 0091-7613 KW - polar regions KW - imagery KW - laser methods KW - satellite methods KW - terrestrial planets KW - case studies KW - planets KW - volatiles KW - craters KW - ice KW - Mercury Planet KW - MESSENGER Mission KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637532742?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Images+of+surface+volatiles+in+Mercury%27s+polar+craters+acquired+by+the+MESSENGER+spacecraft&rft.au=Chabot%2C+Nancy+L%3BErnst%2C+Carolyn+M%3BDenevi%2C+Brett+W%3BNair%2C+Hari%3BDeutsch%2C+Ariel+N%3BBlewett%2C+David+T%3BMurchie%2C+Scott+L%3BNeumann%2C+Gregory+A%3BMazarico%2C+Erwan%3BPaige%2C+David+A%3BHarmon%2C+John+K%3BHead%2C+James+W%3BSolomon%2C+Sean+C&rft.aulast=Chabot&rft.aufirst=Nancy&rft.date=2014-10-15&rft.volume=42&rft.issue=12&rft.spage=1051&rft.isbn=&rft.btitle=&rft.title=Geology+%28Boulder%29&rft.issn=00917613&rft_id=info:doi/10.1130%2FG35916.1 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 - 26 N1 - PubXState - CO N1 - Document feature - illus. N1 - SuppNotes - GSA Data Repository item 2014363 N1 - Last updated - 2014-12-18 N1 - CODEN - GLGYBA N1 - SubjectsTermNotLitGenreText - case studies; craters; ice; imagery; laser methods; Mercury Planet; MESSENGER Mission; planets; polar regions; remote sensing; satellite methods; terrestrial planets; volatiles DO - http://dx.doi.org/10.1130/G35916.1 ER - TY - JOUR T1 - Ground-based multiwavelength observations of Comet 103P/Hartley 2 AN - 1849303108; 2016-108245 AB - The Jupiter-family comet 103P/Hartley 2 (103P) was the target of the NASA EPOXI mission. In support of this mission, we conducted observations from radio to submillimeter wavelengths of comet 103P in the three weeks preceding the spacecraft rendezvous on UT 2010 November 4.58. This time period included the passage at perihelion and the closest approach of the comet to the Earth. Here, we report detections of HCN, H (sub 2) CO, CS, and OH and upper limits for HNC and DCN toward 103P using the Arizona Radio Observatory Kitt Peak 12 m telescope (ARO 12 m) and submillimeter telescope (SMT), the James Clerk Maxwell Telescope (JCMT), and the Green Bank Telescope (GBT). The water production rate, Q (sub H20) = (0.67-1.07) X 10 (super 28) s (super -1) , was determined from the GBT OH data. From the average abundance ratios of HCN and H (sub 2) CO relative to water (0.13 + or - 0.03% and 0.14 + or - 0.03%, respectively), we conclude that H (sub 2) CO is depleted and HCN is normal with respect to typically observed cometary mixing ratios. However, the abundance ratio of HCN with water shows a large diversity with time. Using the JCMT data, we measured an upper limit for the DCN/HCN ratio 8 K (2sigma ). Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Gicquel, Adeline AU - Milam, Stefanie N AU - Villanueva, Geronimo L AU - Coulson, I M AU - Chuang, Y L AU - Charnley, S B AU - Cordiner, M A AU - Kuan, Y J Y1 - 2014/10/10/ PY - 2014 DA - 2014 Oct 10 EP - Paper no. 1 PB - IOP Publishing for American Astronomical Society, Bristol VL - 794 IS - 1 SN - 0004-637X, 0004-637X KW - water KW - hydrogen isocyanide KW - Earth-based observations KW - telescope methods KW - isotopes KW - isotope ratios KW - formaldehyde KW - stable isotopes KW - hydroxyl ion KW - organic compounds KW - Hartley 2 Comet KW - comets KW - D/H KW - hydrogen KW - Jupiter-family comets KW - hydrogen cyanide KW - carbo monosulfide KW - EPOXI Mission KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849303108?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Astrophysical+Journal&rft.atitle=Ground-based+multiwavelength+observations+of+Comet+103P%2FHartley+2&rft.au=Gicquel%2C+Adeline%3BMilam%2C+Stefanie+N%3BVillanueva%2C+Geronimo+L%3BCoulson%2C+I+M%3BChuang%2C+Y+L%3BCharnley%2C+S+B%3BCordiner%2C+M+A%3BKuan%2C+Y+J&rft.aulast=Gicquel&rft.aufirst=Adeline&rft.date=2014-10-10&rft.volume=794&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F794%2F1%2F1 L2 - http://iopscience.iop.org/0004-637X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 78 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - carbo monosulfide; comets; D/H; Earth-based observations; EPOXI Mission; formaldehyde; Hartley 2 Comet; hydrogen; hydrogen cyanide; hydrogen isocyanide; hydroxyl ion; isotope ratios; isotopes; Jupiter-family comets; organic compounds; stable isotopes; telescope methods; water DO - http://dx.doi.org/10.1088/0004-637X/794/1/1 ER - TY - JOUR T1 - On the frequency of potential Venus analogs from Kepler data AN - 1849301251; 2016-108255 AB - The field of exoplanetary science has seen a dramatic improvement in sensitivity to terrestrial planets over recent years. Such discoveries have been a key feature of results from the Kepler mission which utilizes the transit method to determine the size of the planet. These discoveries have resulted in a corresponding interest in the topic of the Habitable Zone and the search for potential Earth analogs. Within the solar system, there is a clear dichotomy between Venus and Earth in terms of atmospheric evolution, likely the result of the large difference (approximately a factor of two) in incident flux from the Sun. Since Venus is 95% of the Earth's radius in size, it is impossible to distinguish between these two planets based only on size. In this Letter we discuss planetary insolation in the context of atmospheric erosion and runaway greenhouse limits for planets similar to Venus. We define a "Venus Zone" in which the planet is more likely to be a Venus analog rather than an Earth analog. We identify 43 potential Venus analogs with an occurrence rate (eta (planet Venus symbol)) of 0.32 (sub -0.07) (super +0.05) and 0.45 (sub -0.09) (super +0.05) for M dwarfs and GK dwarfs, respectively. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal. Letters AU - Kane, Stephen R AU - Kopparapu, Ravi Kumar AU - Domagal-Goldman, Shawn D Y1 - 2014/10/10/ PY - 2014 DA - 2014 Oct 10 EP - Paper no. L5 PB - IOP Publishing, Bristol VL - 794 IS - 1 SN - 2041-8205, 2041-8205 KW - extrasolar planets KW - Venus KW - GK dwarfs KW - M dwarfs KW - atmosphere KW - astrobiology KW - habitable zone KW - size KW - terrestrial planets KW - planets KW - detection KW - stars KW - dwarf stars KW - insolation KW - greenhouse effect KW - atmospheric escape KW - Kepler Mission KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849301251?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Astrophysical+Journal.+Letters&rft.atitle=On+the+frequency+of+potential+Venus+analogs+from+Kepler+data&rft.au=Kane%2C+Stephen+R%3BKopparapu%2C+Ravi+Kumar%3BDomagal-Goldman%2C+Shawn+D&rft.aulast=Kane&rft.aufirst=Stephen&rft.date=2014-10-10&rft.volume=794&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal.+Letters&rft.issn=20418205&rft_id=info:doi/10.1088%2F2041-8205%2F794%2F1%2FL5 L2 - http://iopscience.iop.org/2041-8205 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 40 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - astrobiology; atmosphere; atmospheric escape; detection; dwarf stars; extrasolar planets; GK dwarfs; greenhouse effect; habitable zone; insolation; Kepler Mission; M dwarfs; planets; size; stars; terrestrial planets; Venus DO - http://dx.doi.org/10.1088/2041-8205/794/1/L5 ER - TY - JOUR T1 - Direct observations of evolving subglacial drainage beneath the Greenland ice sheet AN - 1648906137; 2015-009608 JF - Nature (London) AU - Andrews, Lauren C AU - Catania, Ginny A AU - Hoffman, Matthew J AU - Gulley, Jason D AU - Luthi, Martin P AU - Ryser, Claudia AU - Hawley, Robert L AU - Neumann, Thomas A Y1 - 2014/10/02/ PY - 2014 DA - 2014 Oct 02 SP - 80 EP - 83 PB - Macmillan Journals, London VL - 514 IS - 7520 SN - 0028-0836, 0028-0836 KW - hydrology KW - subglacial environment KW - pressure KW - Arctic region KW - drainage KW - Paakitsoq KW - Greenland ice sheet KW - glaciers KW - ice sheets KW - Greenland KW - melting KW - hydraulic head KW - boreholes KW - dynamics KW - velocity KW - seasonal variations KW - glacial geology KW - meltwater KW - 24:Quaternary geology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648906137?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+%28London%29&rft.atitle=Direct+observations+of+evolving+subglacial+drainage+beneath+the+Greenland+ice+sheet&rft.au=Andrews%2C+Lauren+C%3BCatania%2C+Ginny+A%3BHoffman%2C+Matthew+J%3BGulley%2C+Jason+D%3BLuthi%2C+Martin+P%3BRyser%2C+Claudia%3BHawley%2C+Robert+L%3BNeumann%2C+Thomas+A&rft.aulast=Andrews&rft.aufirst=Lauren&rft.date=2014-10-02&rft.volume=514&rft.issue=7520&rft.spage=80&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature13796 L2 - http://www.nature.com/nature/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 47 N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2015-04-16 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - Arctic region; boreholes; drainage; dynamics; glacial geology; glaciers; Greenland; Greenland ice sheet; hydraulic head; hydrology; ice sheets; melting; meltwater; Paakitsoq; pressure; seasonal variations; subglacial environment; velocity DO - http://dx.doi.org/10.1038/nature13796 ER - TY - JOUR T1 - Structure and evolution of the lunar Procellarum region as revealed by GRAIL gravity data AN - 1648905519; 2015-009607 JF - Nature (London) AU - Andrews-Hanna, Jeffrey C AU - Besserer, Jonathan AU - Head, James W, III AU - Howett, Carly J A AU - Kiefer, Walter S AU - Lucey, Paul J AU - McGovern, Patrick J AU - Melosh, H Jay AU - Neumann, Gregory A AU - Phillips, Roger J AU - Schenk, Paul M AU - Smith, David E AU - Solomon, Sean C AU - Zuber, Maria T Y1 - 2014/10/02/ PY - 2014 DA - 2014 Oct 02 SP - 68 EP - 71 PB - Macmillan Journals, London VL - 514 IS - 7520 SN - 0028-0836, 0028-0836 KW - patterns KW - rift zones KW - Moon KW - magmatism KW - thermal properties KW - geophysical methods KW - Oceanus Procellarum KW - GRAIL KW - gravity methods KW - gravity anomalies KW - KREEP KW - intrusions KW - dikes KW - lunar crust KW - Bouguer anomalies KW - tectonics KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648905519?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Structure+and+evolution+of+the+lunar+Procellarum+region+as+revealed+by+GRAIL+gravity+data&rft.au=Andrews-Hanna%2C+Jeffrey+C%3BBesserer%2C+Jonathan%3BHead%2C+James+W%2C+III%3BHowett%2C+Carly+J+A%3BKiefer%2C+Walter+S%3BLucey%2C+Paul+J%3BMcGovern%2C+Patrick+J%3BMelosh%2C+H+Jay%3BNeumann%2C+Gregory+A%3BPhillips%2C+Roger+J%3BSchenk%2C+Paul+M%3BSmith%2C+David+E%3BSolomon%2C+Sean+C%3BZuber%2C+Maria+T&rft.aulast=Andrews-Hanna&rft.aufirst=Jeffrey&rft.date=2014-10-02&rft.volume=514&rft.issue=7520&rft.spage=68&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature13697 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 - 72 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-04-16 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - Bouguer anomalies; dikes; geophysical methods; GRAIL; gravity anomalies; gravity methods; intrusions; KREEP; lunar crust; magmatism; Moon; Oceanus Procellarum; patterns; rift zones; tectonics; thermal properties DO - http://dx.doi.org/10.1038/nature13697 ER - TY - JOUR T1 - The photochemistry of pyrimidine in realistic astrophysical ices and the production of nucleobases AN - 1832603964; 712951-46 AB - Nucleobases, together with deoxyribose/ribose and phosphoric acid, are the building blocks of DNA and RNA for all known life. The presence of nucleobase-like compounds in carbonaceous chondrites delivered to the Earth raises the question of an extraterrestrial origin for the molecules that triggered life on our planet. Whether these molecules are formed in interstellar/protostellar environments, in small parent bodies in the solar system, or both, is currently unclear. Recent experiments show that the UV irradiation of pyrimidine (C (sub 4) H (sub 4) N (sub 2) ) in H (sub 2) O-rich ice mixtures that contain NH (sub 3) , CH (sub 3) OH, or CH (sub 4) leads to the formation of the pyrimidine-based nucleobases uracil, cytosine, and thymine. In this work, we discuss the low-temperature UV irradiation of pyrimidine in realistic astrophysical ice mixtures containing H (sub 2) O, CH (sub 3) OH, and NH (sub 3) , with or without CH (sub 4) , to search for the production of nucleobases and other prebiotic compounds. These experiments show the presence of uracil, urea, glycerol, hexamethylenetetramine, small amino acids, and small carboxylic acids in all samples. Cytosine was only found in one sample produced from ices irradiated with a higher UV dose, while thymine was not found in any sample, even after irradiation with a higher UV dose. Results are discussed to evaluate the role of the photochemistry of pyrimidine in the inventory of organic molecules detected in meteorites and their astrophysical/astrobiological implications. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Nuevo, Michel AU - Materese, Christopher K AU - Sandford, Scott A Y1 - 2014/10/01/ PY - 2014 DA - 2014 Oct 01 EP - Paper no. 125 PB - IOP Publishing for American Astronomical Society, Bristol VL - 793 IS - 2 SN - 0004-637X, 0004-637X KW - ammonium KW - irradiation KW - nucleobases KW - prebiotic chemistry KW - aliphatic hydrocarbons KW - astrobiology KW - temperature KW - urea KW - electromagnetic radiation KW - ice KW - amino acids KW - carboxylic acids KW - alcohols KW - pyrimidine KW - water KW - experimental studies KW - methane KW - organic minerals KW - photochemistry KW - cosmochemistry KW - alkanes KW - ultraviolet radiation KW - methanol KW - organic compounds KW - organic acids KW - nucleic acids KW - RNA KW - low temperature KW - hydrocarbons KW - DNA KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832603964?accountid=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=The+photochemistry+of+pyrimidine+in+realistic+astrophysical+ices+and+the+production+of+nucleobases&rft.au=Nuevo%2C+Michel%3BMaterese%2C+Christopher+K%3BSandford%2C+Scott+A&rft.aulast=Nuevo&rft.aufirst=Michel&rft.date=2014-10-01&rft.volume=793&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%2F793%2F2%2F125 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 - 55 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - alcohols; aliphatic hydrocarbons; alkanes; amino acids; ammonium; astrobiology; carboxylic acids; cosmochemistry; DNA; electromagnetic radiation; experimental studies; hydrocarbons; ice; irradiation; low temperature; methane; methanol; nucleic acids; nucleobases; organic acids; organic compounds; organic minerals; photochemistry; prebiotic chemistry; pyrimidine; RNA; temperature; ultraviolet radiation; urea; water DO - http://dx.doi.org/10.1088/0004-637X/793/2/125 ER - TY - JOUR T1 - Satellite-altitude horizontal magnetic gradient anomalies used to define the Kursk magnetic anomaly AN - 1832599009; 712382-14 AB - The Kursk Magnetic Anomaly (KMA), Russia, is one of the world's largest magnetic anomalies. We used satellite altitude horizontal gradient magnetic anomaly data to study this feature. There are two main objectives of our research; the first, to determine if the technique of the horizontal magnetic anomaly gradient analysis can be applied to CHAMP satellite altitude data to define the outline of the source of the Kursk Magnetic Anomaly (KMA). Another objective is to use the ten years of CHAMP data to reproduce the horizontal magnetic anomaly gradient data that will be measured by the two lower orbiting ESA/Swarm mission. We will be able to evaluate the application of these newer satellite altitude data for studying large areas with significant crustal magnetization. While we have acquired sufficient CHAMP orbital data to compute a horizontal gradient anomaly map from these ten years of data; the future ESA/Swarm mission will, however, allow us to compute directly the horizontal magnetic anomaly without orbital altitude and/or magnetic secular variations; however the east-west gradient that the Swarm is measuring will minimize, but not eliminate, the difference in external fields between the two lower satellites. One will still need to use relatively quiet data (e.g., K (sub p) < 1) for crustal field mapping. Our results, developed from interpreting the satellite horizontal magnetic anomaly data, indicate that the source of the KMA is bowl shaped body open to the northwest covering an area of approximately 190,000 km (super 2) . Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Applied Geophysics AU - Taylor, P T AU - Kis, K I AU - Wittmann, G Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 133 EP - 139 PB - Elsevier, Amsterdam VL - 109 SN - 0926-9851, 0926-9851 KW - Kursk magnetic anomaly KW - Commonwealth of Independent States KW - geophysical methods KW - CHAMP KW - magnetic methods KW - Europe KW - Russian Federation KW - satellite methods KW - remote sensing KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832599009?accountid=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+Applied+Geophysics&rft.atitle=Satellite-altitude+horizontal+magnetic+gradient+anomalies+used+to+define+the+Kursk+magnetic+anomaly&rft.au=Taylor%2C+P+T%3BKis%2C+K+I%3BWittmann%2C+G&rft.aulast=Taylor&rft.aufirst=P&rft.date=2014-10-01&rft.volume=109&rft.issue=&rft.spage=133&rft.isbn=&rft.btitle=&rft.title=Journal+of+Applied+Geophysics&rft.issn=09269851&rft_id=info:doi/10.1016%2Fj.jappgeo.2014.07.018 L2 - http://www.sciencedirect.com/science/journal/09269851 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 - 34 N1 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - CHAMP; Commonwealth of Independent States; Europe; geophysical methods; Kursk magnetic anomaly; magnetic methods; remote sensing; Russian Federation; satellite methods DO - http://dx.doi.org/10.1016/j.jappgeo.2014.07.018 ER - TY - JOUR T1 - Using EOS Data to Improve Aerosol Forecasting: The International Cooperative for Aerosol Prediction (ICAP) AN - 1705078099; PQ0001809049 AB - Aerosols are airborne particles and droplets so tiny that they can remain suspended in the atmosphere for long periods of time and be transported over long distances-even circumnavigating the globe. Their sources are both natural and man-made, and include windblown dust from deserts, smoke from wildfires, sulfurous particles from volcanic eruptions, and sulfurous and carbonaceous particles produced by fossil fuel combustion. Aerosols affect Earths climate by reflecting and absorbing incoming solar radiation, and by interacting with clouds and hence changing their radiative properties and dynamics. Near Earth's surface, aerosol particles are pollutants that exacerbate air quality problems. Higher in the atmosphere, aerosols ejected from volcanoes can disrupt air traffic-as the 2010 eruption of the Eyjafjallajokull volcano in Iceland made dramatically clear. JF - Earth Observer AU - Colarco, Peter AU - Benedetti, Angela AU - Reid, Jeffrey AU - Tanaka, Taichu AD - NASA's Goddard Space Flight Center, peter.r.colarco@nasa.gov Y1 - 2014/10// PY - 2014 DA - Oct 2014 SP - 14 EP - 19 PB - EOS Project Science Office, NASA Goddard Space Flight Center Greenbelt MD 20771 USA VL - 26 IS - 5 KW - Pollution Abstracts KW - Prediction KW - Aerosols KW - Eruptions KW - Fossil fuels KW - Climate KW - ANE, Atlantic, Iceland KW - Volcanoes KW - Air quality KW - Particulates KW - Solar radiation KW - Atmosphere KW - Dust KW - Combustion KW - Clouds KW - Smoke KW - P 0000:AIR POLLUTION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1705078099?accountid=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=Earth+Observer&rft.atitle=Using+EOS+Data+to+Improve+Aerosol+Forecasting%3A+The+International+Cooperative+for+Aerosol+Prediction+%28ICAP%29&rft.au=Colarco%2C+Peter%3BBenedetti%2C+Angela%3BReid%2C+Jeffrey%3BTanaka%2C+Taichu&rft.aulast=Colarco&rft.aufirst=Peter&rft.date=2014-10-01&rft.volume=26&rft.issue=5&rft.spage=14&rft.isbn=&rft.btitle=&rft.title=Earth+Observer&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Prediction; Aerosols; Eruptions; Fossil fuels; Climate; Volcanoes; Air quality; Particulates; Solar radiation; Atmosphere; Dust; Combustion; Smoke; Clouds; ANE, Atlantic, Iceland ER - TY - JOUR T1 - Growth of Jupiter; enhancement of core accretion by a voluminous low-mass envelope AN - 1696877974; 2015-069017 JF - Icarus AU - D'Angelo, Gennaro AU - Weidenschilling, Stuart J AU - Lissauer, Jack J AU - Bodenheimer, Peter Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 298 EP - 312 PB - Elsevier, New York, NY VL - 241 SN - 0019-1035, 0019-1035 KW - fragmentation KW - accretion KW - numerical models KW - density KW - orbits KW - sedimentation KW - Jupiter KW - planetesimals KW - impacts KW - interplanetary dust KW - size KW - giant planets KW - mass KW - planets KW - cosmic dust KW - volume KW - core KW - outer planets KW - coagulation KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877974?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Growth+of+Jupiter%3B+enhancement+of+core+accretion+by+a+voluminous+low-mass+envelope&rft.au=D%27Angelo%2C+Gennaro%3BWeidenschilling%2C+Stuart+J%3BLissauer%2C+Jack+J%3BBodenheimer%2C+Peter&rft.aulast=D%27Angelo&rft.aufirst=Gennaro&rft.date=2014-10-01&rft.volume=241&rft.issue=&rft.spage=298&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.06.029 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 67 N1 - PubXState - NY N1 - Document feature - illus. N1 - Last updated - 2015-07-17 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - accretion; coagulation; core; cosmic dust; density; fragmentation; giant planets; impacts; interplanetary dust; Jupiter; mass; numerical models; orbits; outer planets; planetesimals; planets; sedimentation; size; volume DO - http://dx.doi.org/10.1016/j.icarus.2014.06.029 ER - TY - JOUR T1 - Lunar polar craters; icy, rough or just sloping? AN - 1696876033; 2015-069001 JF - Icarus AU - Eke, Vincent R AU - Bartram, Sarah A AU - Lane, David A AU - Smith, David AU - Teodoro, Luis F A Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 66 EP - 78 PB - Elsevier, New York, NY VL - 241 SN - 0019-1035, 0019-1035 KW - polarization KW - impact features KW - Lunar Reconnaissance Orbiter KW - slopes KW - Mini-SAR instrument KW - Chandrayaan-1 Mission KW - digital terrain models KW - lunar craters KW - temperature KW - topography KW - SAR KW - mosaics KW - ice KW - permanently shadowed regions KW - algorithms KW - surface properties KW - polar regions KW - Moon KW - roughness KW - anomalies KW - pixels KW - depth KW - size KW - impact craters KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696876033?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Lunar+polar+craters%3B+icy%2C+rough+or+just+sloping%3F&rft.au=Eke%2C+Vincent+R%3BBartram%2C+Sarah+A%3BLane%2C+David+A%3BSmith%2C+David%3BTeodoro%2C+Luis+F+A&rft.aulast=Eke&rft.aufirst=Vincent&rft.date=2014-10-01&rft.volume=241&rft.issue=&rft.spage=66&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.06.021 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 44 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-11-19 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - algorithms; anomalies; Chandrayaan-1 Mission; depth; digital terrain models; ice; impact craters; impact features; lunar craters; Lunar Reconnaissance Orbiter; Mini-SAR instrument; Moon; mosaics; permanently shadowed regions; pixels; polar regions; polarization; regolith; roughness; SAR; size; slopes; surface properties; temperature; topography DO - http://dx.doi.org/10.1016/j.icarus.2014.06.021 ER - TY - JOUR T1 - Cassini-VIMS observations of Saturn's main rings; I, Spectral properties and temperature radial profiles variability with phase angle and elevation AN - 1696875636; 2015-069000 JF - Icarus AU - Filacchione, Gianrico AU - Ciarniello, M AU - Capaccioni, F AU - Clark, Roger N AU - Nicholson, P D AU - Hedman, Matthew M AU - Cuzzi, J N AU - Cruikshank, D P AU - Dalle Ore, C M AU - Brown, R H AU - Cerroni, P AU - Altobelli, Nicolas AU - Spilker, L J Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 45 EP - 65 PB - Elsevier, New York, NY VL - 241 SN - 0019-1035, 0019-1035 KW - albedo KW - optical spectra KW - aliphatic hydrocarbons KW - temperature KW - infrared spectra KW - giant planets KW - Saturn KW - photometry KW - Cassini-Huygens Mission KW - phase angle KW - ice KW - spectra KW - outer planets KW - diurnal variations KW - visual and infrared mapping spectrometers KW - water KW - grain size KW - elevation KW - Cassini-VIMS KW - thermal properties KW - atmosphere KW - planets KW - planetary rings KW - organic compounds KW - hydrocarbons KW - polycyclic aromatic hydrocarbons KW - seasonal variations KW - regolith KW - particles KW - aromatic hydrocarbons KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875636?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cassini-VIMS+observations+of+Saturn%27s+main+rings%3B+I%2C+Spectral+properties+and+temperature+radial+profiles+variability+with+phase+angle+and+elevation&rft.au=Filacchione%2C+Gianrico%3BCiarniello%2C+M%3BCapaccioni%2C+F%3BClark%2C+Roger+N%3BNicholson%2C+P+D%3BHedman%2C+Matthew+M%3BCuzzi%2C+J+N%3BCruikshank%2C+D+P%3BDalle+Ore%2C+C+M%3BBrown%2C+R+H%3BCerroni%2C+P%3BAltobelli%2C+Nicolas%3BSpilker%2C+L+J&rft.aulast=Filacchione&rft.aufirst=Gianrico&rft.date=2014-10-01&rft.volume=241&rft.issue=&rft.spage=45&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.06.001 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 75 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-11-19 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - albedo; aliphatic hydrocarbons; aromatic hydrocarbons; atmosphere; Cassini-Huygens Mission; Cassini-VIMS; diurnal variations; elevation; giant planets; grain size; hydrocarbons; ice; infrared spectra; optical spectra; organic compounds; outer planets; particles; phase angle; photometry; planetary rings; planets; polycyclic aromatic hydrocarbons; regolith; Saturn; seasonal variations; spectra; temperature; thermal properties; visual and infrared mapping spectrometers; water DO - http://dx.doi.org/10.1016/j.icarus.2014.06.001 ER - TY - JOUR T1 - Thermophysical property variations across Dione and Rhea AN - 1696875497; 2015-069013 JF - Icarus AU - Howett, C J A AU - Spencer, J R AU - Hurford, T AU - Verbiscer, A AU - Segura, M Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 239 EP - 247 PB - Elsevier, New York, NY VL - 241 SN - 0019-1035, 0019-1035 KW - albedo KW - icy satellites KW - thermal inertia KW - Inktomi Crater KW - Rhea Satellite KW - ejecta KW - infrared spectra KW - Cassini-Huygens Mission KW - thermal anomalies KW - thermomechanical properties KW - spectra KW - Dione Satellite KW - satellites KW - electrons KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875497?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Thermophysical+property+variations+across+Dione+and+Rhea&rft.au=Howett%2C+C+J+A%3BSpencer%2C+J+R%3BHurford%2C+T%3BVerbiscer%2C+A%3BSegura%2C+M&rft.aulast=Howett&rft.aufirst=C+J&rft.date=2014-10-01&rft.volume=241&rft.issue=&rft.spage=239&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.05.047 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 38 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2015-07-17 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - albedo; Cassini-Huygens Mission; Dione Satellite; ejecta; electrons; icy satellites; infrared spectra; Inktomi Crater; Rhea Satellite; satellites; spectra; thermal anomalies; thermal inertia; thermomechanical properties DO - http://dx.doi.org/10.1016/j.icarus.2014.05.047 ER - TY - JOUR T1 - Mapping minerals with light AN - 1680751291; 2015-044276 JF - Earth Imaging Journal AU - Riebeek, Holli Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 26 EP - 27 PB - Earthwide Communications, Greeley, CO VL - 11 IS - 5 SN - 1548-0720, 1548-0720 KW - multispectral analysis KW - mineral exploration KW - imagery KW - Far East KW - northwestern China KW - Asia KW - satellite methods KW - China KW - remote sensing KW - 20:Applied geophysics KW - 26A:Economic geology, general, deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680751291?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Imaging+Journal&rft.atitle=Mapping+minerals+with+light&rft.au=Riebeek%2C+Holli&rft.aulast=Riebeek&rft.aufirst=Holli&rft.date=2014-10-01&rft.volume=11&rft.issue=5&rft.spage=26&rft.isbn=&rft.btitle=&rft.title=Earth+Imaging+Journal&rft.issn=15480720&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Document feature - illus. N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Asia; China; Far East; imagery; mineral exploration; multispectral analysis; northwestern China; remote sensing; satellite methods ER - TY - JOUR T1 - Caterpillar-like ice motion in the ablation zone of the Greenland ice sheet AN - 1656036742; 2015-013699 AB - Current understanding of ice dynamics predicts that increasing availability and variability of meltwater will have an impact on basal motion and therefore on the evolution and future behavior of the Greenland ice sheet. We present measurements of ice deformation, subglacial water pressure, and surface velocity that show periodic and episodic variations on several time scales (seasonal, multiday, and diurnal). These variations, observed with GPS and sensors at different depths throughout the ice column, are not synchronous but show delayed responses of ice deformation with increasing depth and basal water pressure in antiphase with surface velocity. With the help of a Full-Stokes ice flow model, these observations are explained as ice motion in a caterpillar-like fashion. Caused by patches of different basal slipperiness, horizontal stress transfer through the stiff central part of the ice body leads to spatially varying surface velocities and ice deformation patterns. Variation of this basal slipperiness induces characteristic patterns of ice deformation variability that explain the observed behavior. Ice flow in the ablation zone of the Greenland ice sheet is therefore controlled by activation of basal patches by varying slipperiness in the course of a melt season, leading to caterpillar-like ice motion superposed on the classical shear deformation. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Earth Surface AU - Ryser, C AU - Luethi, M P AU - Andrews, L C AU - Catania, G A AU - Funk, M AU - Hawley, R AU - Hoffman, M AU - Neumann, T A Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 2258 EP - 2271 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 10 SN - 2169-9003, 2169-9003 KW - ablation KW - Arctic region KW - Greenland ice sheet KW - ice cover KW - glaciers KW - ice sheets KW - climate change KW - ice movement KW - Greenland KW - mass balance KW - climate effects KW - glacial geology KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036742?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.atitle=Caterpillar-like+ice+motion+in+the+ablation+zone+of+the+Greenland+ice+sheet&rft.au=Ryser%2C+C%3BLuethi%2C+M+P%3BAndrews%2C+L+C%3BCatania%2C+G+A%3BFunk%2C+M%3BHawley%2C+R%3BHoffman%2C+M%3BNeumann%2C+T+A&rft.aulast=Ryser&rft.aufirst=C&rft.date=2014-10-01&rft.volume=119&rft.issue=10&rft.spage=2258&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.issn=21699003&rft_id=info:doi/10.1002%2F2013JF003067 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9011/issues?year=2013 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 40 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - ablation; Arctic region; climate change; climate effects; glacial geology; glaciers; Greenland; Greenland ice sheet; ice cover; ice movement; ice sheets; mass balance DO - http://dx.doi.org/10.1002/2013JF003067 ER - TY - JOUR T1 - The impact of the assimilation of Aquarius sea surface salinity data in the GEOS ocean data assimilation system AN - 1648907714; 2015-011763 AB - Ocean salinity and temperature differences drive thermohaline circulation. These properties also play a key role in the ocean-atmosphere coupling. With the availability of L-band space-borne observations, it becomes possible to provide global scale sea surface salinity (SSS) distribution. This study analyzes globally the along-track (Level 2) Aquarius SSS retrievals obtained using both passive and active L-band observations. Aquarius along-track retrieved SSS are assimilated into the ocean data assimilation component of Version 5 of the Goddard Earth Observing System (GEOS-5) assimilation and forecast model. We present a methodology to correct the large biases and errors apparent in Version 2.0 of the Aquarius SSS retrieval algorithm and map the observed Aquarius SSS retrieval into the ocean model's bulk salinity in the topmost layer. The impact of the assimilation of the corrected SSS on the salinity analysis is evaluated by comparisons with in situ salinity measurements from Argo. The results show a significant reduction of the global biases and RMS of observations-minus-forecast differences at in situ locations. The most striking results are found in the tropics and southern latitudes. Our results highlight the complementary role and problems that arise during the assimilation of salinity information from in situ (Argo) and space-borne SSS retrievals. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Vernieres, G AU - Kovach, R AU - Keppenne, C AU - Akella, S AU - Brucker, L AU - Dinnat, E Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 6974 EP - 6987 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 10 SN - 2169-9275, 2169-9275 KW - ocean circulation KW - sea-surface salinity KW - sea water KW - sea surface water KW - air-sea interface KW - salinity KW - satellite methods KW - temperature KW - thermohaline circulation KW - sea-surface temperature KW - world ocean KW - remote sensing KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648907714?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=The+impact+of+the+assimilation+of+Aquarius+sea+surface+salinity+data+in+the+GEOS+ocean+data+assimilation+system&rft.au=Vernieres%2C+G%3BKovach%2C+R%3BKeppenne%2C+C%3BAkella%2C+S%3BBrucker%2C+L%3BDinnat%2C+E&rft.aulast=Vernieres&rft.aufirst=G&rft.date=2014-10-01&rft.volume=119&rft.issue=10&rft.spage=6974&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2014JC010006 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 45 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-01-29 N1 - SubjectsTermNotLitGenreText - air-sea interface; ocean circulation; remote sensing; salinity; satellite methods; sea surface water; sea water; sea-surface salinity; sea-surface temperature; temperature; thermohaline circulation; world ocean DO - http://dx.doi.org/10.1002/2014JC010006 ER - TY - JOUR T1 - Sea surface salinity variability in the East China Sea observed by the Aquarius Instrument AN - 1648907553; 2015-011766 AB - This study demonstrates that the spaceborne Aquarius instrument is able to monitor the sea surface salinity (SSS) variations in the East China Sea (ECS) with the spatial resolution of about 150 km at 7 day interval, where routine observations are difficult. The two geophysical contaminants enter the sidelobes of the Aquarius antenna and bias the coastal SSS low: the emission from the land surface and the radiofrequency interference (RFI). Away from about one Aquarius pixel (150 km) from the coastline, the Aquarius SSS is fairly insensitive (less than about 0.2 psu) to the radiometric details of the method to correct for the land emission. The ascending orbits appear to be affected by unfiltered RFI much less than the descending tracks. The Aquarius SSS along the ascending tracks is low over the ECS by 0.40-0.93 psu (with respect to the in situ data during the two separate 7 day periods) and is biased low by 0.41-1.07 psu (accuracy, or the time-mean of difference from the regional model along three Aquarius tracks over a 18 month period). The presence of the ascending and descending differences in the Aquarius SSS, and the spatially widespread bias suggest that the bias is attributed to the unfiltered RFI originating from strong point sources (rather than to the land contamination from weak distributed sources, or to other seasonally varying geophysical contaminants). Despite the bias, the Aquarius data describe well the temporal and spatial variability of the ECS SSS. The temporal trend and magnitude of salinity changes agree remarkably between Aquarius and a regional numerical model, during both the freshwater discharge season from the Yangtze river and the rest of the year. The precision of the Aquarius observation in the ECS is comparable with the Aquarius mission requirement (0.2 psu one-sigma for a monthly average over the open ocean). The river discharge rate correlates with the Aquarius SSS with the coefficient of 0.71 on a seasonal scale with the discharge leading the SSS changes. The Aquarius SSS increases away from the coast, in response to the river outflow. The interannual changes in the Aquarius SSS capture the effect of the regional drought in summer 2013. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Kim, Seung-bum AU - Lee, Jae-Hak AU - de Matthaeis, Paolo AU - Yueh, Simon AU - Hong, Chang-Su AU - Lee, Joon-Ho AU - Lagerloef, Gary Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 7016 EP - 7028 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 10 SN - 2169-9275, 2169-9275 KW - East China Sea KW - sea-surface salinity KW - sea water KW - sea surface water KW - salinity KW - satellite methods KW - West Pacific KW - temperature KW - North Pacific KW - Pacific Ocean KW - sea-surface temperature KW - Northwest Pacific KW - remote sensing KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648907553?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Sea+surface+salinity+variability+in+the+East+China+Sea+observed+by+the+Aquarius+Instrument&rft.au=Kim%2C+Seung-bum%3BLee%2C+Jae-Hak%3Bde+Matthaeis%2C+Paolo%3BYueh%2C+Simon%3BHong%2C+Chang-Su%3BLee%2C+Joon-Ho%3BLagerloef%2C+Gary&rft.aulast=Kim&rft.aufirst=Seung-bum&rft.date=2014-10-01&rft.volume=119&rft.issue=10&rft.spage=7016&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2014JC009983 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. 2 tables, sketch map N1 - Last updated - 2015-01-29 N1 - SubjectsTermNotLitGenreText - East China Sea; North Pacific; Northwest Pacific; Pacific Ocean; remote sensing; salinity; satellite methods; sea surface water; sea water; sea-surface salinity; sea-surface temperature; temperature; West Pacific DO - http://dx.doi.org/10.1002/2014JC009983 ER - TY - JOUR T1 - The Orgueil Meteorite; 150 years of history AN - 1645572162; 2015-004283 AB - The goal of this paper is to summarize 150 yr of history of a very special meteorite. The Orgueil meteorite fell near Montauban in southwestern France on May 14, 1864. The bolide, which was the size of the full Moon, was seen across Western France, and almost immediately made the news in local and Parisian newspapers. Within a few weeks of the fall, a great diversity of analyses were performed under the authority of Gabriel Auguste Daubree, geology professor at the Paris Museum, and published in the Comptes Rendus de l'Academie des Sciences. The skilled scientists reported the presence of iron sulfides, hydrated silicates, and carbonates in Orgueil. They also characterized ammonium salts which are now gone, and observed sulfates being remobilized at the surface of the stone. They identified the high water and carbon contents, and noted similarities with the Alais meteorite, which had fallen in 1806, 300 km away. While Daubree and his colleagues noted the similarity of the Orgueil organic matter with some terrestrial humus, they were cautious not to make a direct link with living organisms. One century later, Nagy and Claus were less prudent and announced the discovery of "organized" elements in some samples of Orgueil. Their observations were quickly discredited by Edward Anders and others who also discovered that some pollen grains were intentionally placed into the rock back in the 1860s. Orgueil is now one of the most studied meteorites, indeed one of the most studied rocks of any kind. Not only does it contain a large diversity of carbon-rich compounds, which help address the question of organo-synthesis in the early solar system but its chemical composition is also close to that of the Sun's photosphere and serves as a cosmic reference. Secondary minerals, which make up 99% of the volume of Orgueil, were probably formed during hydrothermal alteration on the parent-body within the first few million years of the solar system; their study is essential to our understanding of fluid-rock interaction in asteroids and comets. Finally, the Orgueil meteorite probably originated from a volatile-rich "cometary" outer solar system body as indicated by its orbit. Because it bears strong similarities to other carbonaceous chondrites that originated on dark asteroids, this cometary connection supports the idea of a continuum between dark asteroids and comets. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Gounelle, Matthieu AU - Zolensky, Michael E Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 1769 EP - 1794 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 10 SN - 1086-9379, 1086-9379 KW - alteration KW - terrestrial environment KW - stony meteorites KW - Orgueil Meteorite KW - asteroids KW - isotopes KW - orbits KW - Europe KW - metasomatism KW - France KW - meteorites KW - Daubree, Gabriel Auguste KW - water-rock interaction KW - hydrothermal alteration KW - chondrites KW - chemical composition KW - Montauban France KW - carbonaceous composition KW - CI chondrites KW - breccia KW - Western Europe KW - sulfates KW - secondary minerals KW - parent bodies KW - trajectories KW - carbonaceous chondrites KW - veins KW - meteorite falls KW - history KW - volatiles KW - comets KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645572162?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Orgueil+Meteorite%3B+150+years+of+history&rft.au=Gounelle%2C+Matthieu%3BZolensky%2C+Michael+E&rft.aulast=Gounelle&rft.aufirst=Matthieu&rft.date=2014-10-01&rft.volume=49&rft.issue=10&rft.spage=1769&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12351 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 - 127 N1 - PubXState - AR N1 - Document feature - illus. N1 - Last updated - 2015-01-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - alteration; asteroids; breccia; carbonaceous chondrites; carbonaceous composition; chemical composition; chondrites; CI chondrites; comets; Daubree, Gabriel Auguste; Europe; France; history; hydrothermal alteration; isotopes; metasomatism; meteorite falls; meteorites; Montauban France; orbits; Orgueil Meteorite; parent bodies; secondary minerals; stony meteorites; sulfates; terrestrial environment; trajectories; veins; volatiles; water-rock interaction; Western Europe DO - http://dx.doi.org/10.1111/maps.12351 ER - TY - JOUR T1 - Regional projections of the likelihood of very large wildland fires under a changing climate in the contiguous Western United States AN - 1642304668; 20849704 AB - Seasonal changes in the climatic potential for very large wildfires (VLWF greater than or equal to 50,000 ac~20,234 ha) across the western contiguous United States are projected over the 21st century using generalized linear models and downscaled climate projections for two representative concentration pathways (RCPs). Significant (p less than or equal to 0.05) increases in VLWF probability for climate of the mid-21st century (2031-2060) relative to contemporary climate are found, for both RCP 4.5 and 8.5. The largest differences are in the Eastern Great Basin, Northern Rockies, Pacific Northwest, Rocky Mountains, and Southwest. Changes in seasonality and frequency of VLWFs d7epend on changes in the future climate space. For example, flammability-limited areas such as the Pacific Northwest show that (with high model agreement) the frequency of weeks with VLWFs in a given year is 2-2.7 more likely. However, frequency of weeks with at least one VLWF in fuel-limited systems like the Western Great Basin is 1.3 times more likely (with low model agreement). Thus, areas where fire is directly associated with hot and dry climate, as opposed to experiencing lagged effects from previous years, experience more change in the likelihood of VLWF in future projections. The results provide a quantitative foundation for management to mitigate the effects of VLWFs. JF - Climatic Change AU - Stavros, ENatasha AU - Abatzoglou, John T AU - McKenzie, Donald AU - Larkin, Narasimhan K AD - Jet Propulsion Laboratory, California Institute of Technology, 4,800 Oak Grove Drive, MS 233-300, Pasadena, CA, 91109-8099, USA natasha.stavros@jpl.nasa.gov Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 455 EP - 468 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 126 IS - 3-4 SN - 0165-0009, 0165-0009 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); ANTE: Abstracts in New Technologies and Engineering (AN) KW - Mountains KW - Fires KW - Projection KW - Northwest KW - Climate KW - Foundations KW - Drying KW - Basins KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642304668?accountid=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=Climatic+Change&rft.atitle=Regional+projections+of+the+likelihood+of+very+large+wildland+fires+under+a+changing+climate+in+the+contiguous+Western+United+States&rft.au=Stavros%2C+ENatasha%3BAbatzoglou%2C+John+T%3BMcKenzie%2C+Donald%3BLarkin%2C+Narasimhan+K&rft.aulast=Stavros&rft.aufirst=ENatasha&rft.date=2014-10-01&rft.volume=126&rft.issue=3-4&rft.spage=455&rft.isbn=&rft.btitle=&rft.title=Climatic+Change&rft.issn=01650009&rft_id=info:doi/10.1007%2Fs10584-014-1229-6 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Number of references - 41 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1007/s10584-014-1229-6 ER - TY - JOUR T1 - A ULF wave driver of ring current energization AN - 1635030746; 20912434 AB - ULF wave radial diffusion plays an important role in the transport of energetic electrons in the outer radiation belt, yet similar ring current transport is seldom considered even though ions satisfy a nearly identical drift resonance condition albeit without the relativistic correction. By examining the correlation between ULF wave power and the response of the ring current, characterized by Dst, we demonstrate a definite correlation between ULF wave power and Dst. Significantly, the lagged correlation peaks such that ULF waves precede the response of the ring current and Dst. We suggest that this correlation is the result of enhanced radial transport and energization of ring current ions through drift resonance and ULF wave radial diffusion of ring current ions. An analysis and comparison of the ion and electron diffusion coefficients further support this conclusion, ULF waves providing an important missing physical transport process explaining Dst underestimation in ring current models. Key Points * ULF waves have an important yet usually neglected role in ring current dynamics * ULF wave ion transport occurs on similar timescales as that of electrons * Important ring current ion ULF wave transport effects must be included in models JF - Geophysical Research Letters AU - Murphy, Kyle R AU - Mann, Ian R AU - Ozeke, Louis G AD - NASA GSFC, Greenbelt, Maryland, USA. Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 6595 EP - 6602 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 41 IS - 19 SN - 0094-8276, 0094-8276 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Ions KW - Diffusion Coefficient KW - Ring current ions KW - Wave power KW - Correlations KW - Radiation belts KW - Wave dynamics KW - Ion Transport KW - Ion transport KW - Current meandering KW - Radiation KW - Resonance KW - Ring current KW - Current rings KW - Waves KW - Diffusion coefficient KW - Ring current models KW - Modelling KW - Wave effects KW - M2 551.521:Radiation (551.521) KW - Q2 09262:Methods and instruments KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1635030746?accountid=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=A+ULF+wave+driver+of+ring+current+energization&rft.au=Murphy%2C+Kyle+R%3BMann%2C+Ian+R%3BOzeke%2C+Louis+G&rft.aulast=Murphy&rft.aufirst=Kyle&rft.date=2014-10-01&rft.volume=41&rft.issue=19&rft.spage=6595&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL061253 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Current meandering; Ion transport; Radiation; Resonance; Wave power; Current rings; Wave dynamics; Wave effects; Modelling; Ring current ions; Ring current; Correlations; Radiation belts; Ring current models; Diffusion coefficient; Ions; Diffusion Coefficient; Waves; Ion Transport DO - http://dx.doi.org/10.1002/2014GL061253 ER - TY - JOUR T1 - Crystal structure of Guinier-Preston zones in orthopyroxene; Z-contrast imaging and ab inito study AN - 1629939310; 2014-099438 AB - Nano-precipitates of Guinier-Preston zones (or G.P. zones) occur in slowly cooled orthopyroxenes (OPX). Due to their nanometer sizes and intergrowth with host OPX, both X-ray diffraction and high-resolution TEM imaging cannot provide a consistent structure model for the G.P. zone precipitates. Combining Z-contrast imaging and density functional theory (DFT) methods, a correct crystal structure for the G.P. zone precipitates can be obtained, because Z-contrast imaging can reveal positions and occupancies of atoms directly. The crystal structure for the G.P. zone has P2 (sub 1) /c symmetry with 4 types of tetrahedral chains (OA1, OA2, OB, OC). The structure can be considered as periodic stacking of half unit cells of enstatite sub-layers and of diopside sub-layers in a twinning-like relationship along a-axis. The G.P. zones that precipitate out from their host Ca-bearing OPX at low temperature are metastable with respect to end-members of enstatite and diopside. JF - American Mineralogist AU - Xu, Huifang AU - Shen, Zhizhang AU - Konishi, Hiromi AU - Luo, Gufeng Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 2043 EP - 2048 PB - Mineralogical Society of America, Washington, DC VL - 99 IS - 10 SN - 0003-004X, 0003-004X KW - silicates KW - high-resolution methods KW - experimental studies KW - X-ray diffraction data KW - density functional theory KW - ab initio KW - unit cell KW - stability KW - crystal structure KW - crystal growth KW - Guinier-Preston zones KW - solid solution KW - twinning KW - TEM data KW - order-disorder KW - pyroxene group KW - clinopyroxene KW - cooling KW - orthopyroxene KW - diopside KW - nanoparticles KW - enstatite KW - chain silicates KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629939310?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/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=Crystal+structure+of+Guinier-Preston+zones+in+orthopyroxene%3B+Z-contrast+imaging+and+ab+inito+study&rft.au=Xu%2C+Huifang%3BShen%2C+Zhizhang%3BKonishi%2C+Hiromi%3BLuo%2C+Gufeng&rft.aulast=Xu&rft.aufirst=Huifang&rft.date=2014-10-01&rft.volume=99&rft.issue=10&rft.spage=2043&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam-2014-4898 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 - 29 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-12-04 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - ab initio; chain silicates; clinopyroxene; cooling; crystal growth; crystal structure; density functional theory; diopside; enstatite; experimental studies; Guinier-Preston zones; high-resolution methods; nanoparticles; order-disorder; orthopyroxene; pyroxene group; silicates; solid solution; stability; TEM data; twinning; unit cell; X-ray diffraction data DO - http://dx.doi.org/10.2138/am-2014-4898 ER - TY - JOUR T1 - Spinel-rich lithologies in the lunar highland crust; linking lunar samples with crystallization experiments and remote sensing AN - 1629939244; 2014-099421 AB - Mg-Al spinel is rare in lunar rocks (Apollo and meteorite collections), and occurs mostly in troctolites and troctolitic cataclastites. Recently, a new lunar lithology, rich in spinel and plagioclase, and lacking abundant olivine and pyroxene, was recognized in visible to near-infrared (VNIR) reflectance spectra by the Moon Mineralogy Mapper (M (super 3) ) instrument on the Chandrayaan-1 spacecraft at the Moscoviense basin. These outcrop-scale areas are inferred to contain 20-30% Mg-Al spinel. Possible explanations for the petrogenesis of spinel-bearing and spinel-rich lithology(s) range from low-pressure near-surface crystallization to a deep-seated origin in the lower lunar crust or upper mantle. Here, we describe 1-bar crystallization experiments conducted on rock compositions rich in olivine and plagioclase that crystallize spinel. This would be equivalent to impact-melting, which is moderately common among lunar plutonic rocks and granulites. To explore possible precursor materials and the maximum amount of spinel that could be crystallized, a lunar troctolitic composition similar to Apollo pink spinel troctolite 65785, and a composition similar to ALHA81005 as analog to the source region of this meteorite have been chosen. The crystallization experiments on the composition of AHLA 81005 did not yield any spinel; experiments on the composition similar to Apollo 65785 crystallized a maximum of approximately 8 wt% spinel, much less than the suggested 20-30% spinel of the new lithology detected by M (super 3) . However, our VNIR spectral reflectance analyses of the experimental run products indicate that the spinel composition of the experimental run products not only appears to be similar to the composition of the spinel lithology detected by M (super 3) (characteristics of the spinel absorption), but also that the modal abundances of coexisting phases (e.g., mafic glass) influence the spectral reflectance properties. Thus, the spinel-rich deposits detected by M (super 3) might not be as spinel-rich as previously thought and could contain as little as 4-5 wt% spinel. However, the effect of space weathering on spinel is unknown and could significantly weaken its 2 mu m absorptions. If this occurs, weathered lunar rocks could contain more spinel than a comparison with our unweathered experimental charges would suggest. JF - American Mineralogist AU - Gross, Juliane AU - Isaacson, Peter J AU - Treiman, Allan H AU - Le, Loan AU - Gorman, Julia K Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 1849 EP - 1859 PB - Mineralogical Society of America, Washington, DC VL - 99 IS - 10 SN - 0003-004X, 0003-004X KW - near-infrared spectra KW - stony meteorites KW - igneous rocks KW - Apollo Program KW - lunar highlands KW - meteorites KW - plutonic rocks KW - spacecraft KW - metamorphic rocks KW - oxides KW - spectra KW - experimental studies KW - Moon KW - spinel KW - achondrites KW - Moscoviense Basin KW - Chandrayaan Program KW - ALHA 81005 KW - lunar samples KW - Allan Hills Meteorites KW - Antarctica KW - troctolite KW - color KW - crystallization KW - gabbros KW - cataclasites KW - reflectance KW - crust KW - remote sensing KW - 04:Extraterrestrial geology KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629939244?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/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=Spinel-rich+lithologies+in+the+lunar+highland+crust%3B+linking+lunar+samples+with+crystallization+experiments+and+remote+sensing&rft.au=Gross%2C+Juliane%3BIsaacson%2C+Peter+J%3BTreiman%2C+Allan+H%3BLe%2C+Loan%3BGorman%2C+Julia+K&rft.aulast=Gross&rft.aufirst=Juliane&rft.date=2014-10-01&rft.volume=99&rft.issue=10&rft.spage=1849&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam-2014-4780 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 - 63 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2014-12-04 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - achondrites; ALHA 81005; Allan Hills Meteorites; Antarctica; Apollo Program; cataclasites; Chandrayaan Program; color; crust; crystallization; experimental studies; gabbros; igneous rocks; lunar highlands; lunar samples; metamorphic rocks; meteorites; Moon; Moscoviense Basin; near-infrared spectra; oxides; plutonic rocks; reflectance; remote sensing; spacecraft; spectra; spinel; stony meteorites; troctolite DO - http://dx.doi.org/10.2138/am-2014-4780 ER - TY - JOUR T1 - Boundary layer regulation in the southeast Atlantic cloud microphysics during the biomass burning season as seen by the A-train satellite constellation AN - 1622611934; 20895504 AB - Solar radiation absorption by biomass burning aerosols has a strong warming effect over the southeast Atlantic. Interactions between the overlying smoke aerosols and low-level cloud microphysics and the subsequent albedo perturbation are, however, generally ignored in biomass burning radiative assessments. In this study, Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) are combined with Aqua satellite observations from Moderate Resolution Imaging Spectroradiometer (MODIS), Advanced Microwave Scanning Radiometer-EOS (AMSR-E), and Clouds and the Earth's Radiant Energy System (CERES) to assess the effect of variations in the boundary layer height and the separation distance between the cloud and aerosol layers on the cloud microphysics. The merged data analyzed at a daily temporal resolution suggest that overlying smoke aerosols modify cloud properties by decreasing cloud droplet size despite an increase in the cloud liquid water as boundary layer deepens, north of 5 degree S. These changes are controlled by the proximity of the aerosol layer to the cloud top rather than increases in the column aerosol load. The correlations are unlikely driven by meteorological factors, as three predictors of cloud variability, lower tropospheric stability, surface winds, and mixing ratio suggest that cloud effective radius, cloud top height, and liquid water path should correlate positively. Because cloud effective radius anticorrelates with cloud liquid water over the region with large microphysical changes-north of 5 degree S-the overall radiative consequence at the top of the atmosphere is a strong albedo susceptibility, equivalent to a 3% albedo increase due to a 10% decrease in cloud effective radius. This albedo enhancement partially offsets the aerosol solar absorption. Our analysis emphasizes the importance of accounting for the indirect effect of smoke aerosols in the cloud microphysics when estimating the radiative impact of the biomass burning at the top of the atmosphere. Key Points * Overlying smoke aerosols modify clouds by decreasing cloud droplet size * Changes are controlled by the proximity of the aerosol layer to the cloud top * Anticorrelation between droplet size and water path not driven by meteorology JF - Journal of Geophysical Research: Atmospheres AU - Painemal, David AU - Kato, Seiji AU - Minnis, Patrick AD - Science Directory, NASA Langley Research Center, Hampton, Virginia, USA. Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 11 EP - 11,302 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 119 IS - 19 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Remote Sensing KW - Combustion products KW - Boundary Layers KW - Remote sensing KW - Correlations KW - Cloud droplet size KW - Atmosphere KW - ASE, Atlantic KW - Microwaves KW - Asteroids KW - Absorption KW - MODIS (Moderate Resolution Imaging Spectrometer) KW - Meteorology KW - Wind variability KW - Satellite Technology KW - Aerosols KW - Aerosols-cloud condensation nuclei relationships KW - Albedo KW - Aerosols-cloud relationships KW - Troposphere KW - Biomass KW - Satellites KW - Ecosystem disturbance KW - Aerosol layers KW - Clouds KW - Smoke KW - Satellite sensing KW - Incineration KW - Satellite data KW - Energy KW - Boundary layers KW - Burning KW - Cloud microphysics KW - Q2 09243:Structure, mechanics and thermodynamics KW - M2 551.510.42:Air Pollution (551.510.42) KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622611934?accountid=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=Boundary+layer+regulation+in+the+southeast+Atlantic+cloud+microphysics+during+the+biomass+burning+season+as+seen+by+the+A-train+satellite+constellation&rft.au=Painemal%2C+David%3BKato%2C+Seiji%3BMinnis%2C+Patrick&rft.aulast=Painemal&rft.aufirst=David&rft.date=2014-10-01&rft.volume=119&rft.issue=19&rft.spage=11&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2014JD022182 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Smoke; Clouds; Satellite sensing; Aerosols; Microwaves; Boundary layers; Albedo; Troposphere; Ecosystem disturbance; Aerosols-cloud condensation nuclei relationships; Aerosols-cloud relationships; Correlations; Cloud droplet size; Aerosol layers; Satellite data; Asteroids; Meteorology; MODIS (Moderate Resolution Imaging Spectrometer); Wind variability; Cloud microphysics; Combustion products; Remote sensing; Biomass; Satellites; Atmosphere; Energy; Absorption; Burning; Remote Sensing; Satellite Technology; Incineration; Boundary Layers; ASE, Atlantic DO - http://dx.doi.org/10.1002/2014JD022182 ER - TY - JOUR T1 - Implementation of an aerosol-cloud-microphysics-radiation coupling into the NASA unified WRF: Simulation results for the 6-7 August 2006 AMMA special observing period AN - 1622608467; 20874237 AB - Aerosols affect the Earth's radiation balance directly and cloud microphysical processes indirectly via the activation of cloud condensation and ice nuclei. These two effects have often been considered separately and independently, hence the need to assess their combined impact given the differing nature of their effects on convective clouds. To study both effects, an aerosol-microphysics-radiation coupling, including Goddard microphysics and radiation schemes, was implemented into the NASA Unified Weather Research and Forecasting model (NU-WRF). Fully coupled NU-WRF simulations were conducted for a mesoscale convective system (MCS) that passed through the Niamey, Niger area on 6-7 August 2006 during an AMMA special observing period. The results suggest that rainfall is reduced when aerosol indirect effects are included, regardless of the aerosol direct effect. Daily mean radiation heating profiles in the area traversed by the MCS showed the aerosol (mainly mineral dust) direct effect had the largest impact near cloud tops just above 200 hPa where short-wave heating increased by about 0.8 K day super(-1); the weakest long-wave cooling was at around 250 hPa. It was also found that more condensation and ice nuclei as a result of higher aerosol/dust concentrations led to increased amounts of all cloud hydrometeors because of the microphysical indirect effect, and the radiation direct effect acts to reduce precipitating cloud particles (rain, snow and graupel) in the middle and lower cloud layers while increasing the non-precipitating particles (ice) in the cirrus anvil. However, when the aerosol direct effect was activated, regardless of the indirect effect, the onset of MCS precipitation was delayed about 2 h, in conjunction with the delay in the activation of cloud condensation and ice nuclei. Overall, for this particular environment, model set-up and physics configuration, the effect of aerosol radiative heating due to mineral dust overwhelmed the effect of the aerosols on microphysics. JF - Quarterly Journal of the Royal Meteorological Society AU - Shi, J J AU - Matsui, T AU - Tao, W-K AU - Tan, Q AU - Peters-Lidard, C AU - Chin, M AU - Pickering, K AU - Guy, N AU - Lang, S AU - Kemp, E M AD - NASA Goddard Space Flight Center, Greenbelt, >MD, USA. Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 2158 EP - 2175 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 140 IS - 684 SN - 0035-9009, 0035-9009 KW - Oceanic Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts; Environment Abstracts KW - Niger, Niamey KW - Prediction KW - Anvils KW - Rainfall KW - Particulates KW - Dust KW - Radiation KW - Meteorology KW - Mesoscale convective systems KW - Radiative heating KW - Modelling KW - Ice KW - Weather KW - Atmospheric particulates KW - Aerosols KW - Simulation Analysis KW - Aerosols-cloud condensation nuclei relationships KW - Snow KW - Ice nuclei KW - Radiation balance KW - Aerosols-cloud relationships KW - Simulation KW - Precipitation KW - Dusts KW - Niger KW - Clouds KW - Cloud particles KW - Numerical simulations KW - Hydrometeors KW - Convective activity KW - Condensation KW - Minerals KW - Eolian dust KW - M2 551.510.42:Air Pollution (551.510.42) KW - SW 0810:General KW - O 4080:Pollution - Control and Prevention KW - Q2 09244:Air-sea coupling KW - ENA 19:Water Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622608467?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Quarterly+Journal+of+the+Royal+Meteorological+Society&rft.atitle=Implementation+of+an+aerosol-cloud-microphysics-radiation+coupling+into+the+NASA+unified+WRF%3A+Simulation+results+for+the+6-7+August+2006+AMMA+special+observing+period&rft.au=Shi%2C+J+J%3BMatsui%2C+T%3BTao%2C+W-K%3BTan%2C+Q%3BPeters-Lidard%2C+C%3BChin%2C+M%3BPickering%2C+K%3BGuy%2C+N%3BLang%2C+S%3BKemp%2C+E+M&rft.aulast=Shi&rft.aufirst=J&rft.date=2014-10-01&rft.volume=140&rft.issue=684&rft.spage=2158&rft.isbn=&rft.btitle=&rft.title=Quarterly+Journal+of+the+Royal+Meteorological+Society&rft.issn=00359009&rft_id=info:doi/10.1002%2Fqj.2286 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Prediction; Atmospheric particulates; Aerosols; Radiation; Snow; Ice nuclei; Dust; Eolian dust; Modelling; Anvils; Aerosols-cloud condensation nuclei relationships; Radiation balance; Aerosols-cloud relationships; Precipitation; Clouds; Cloud particles; Numerical simulations; Hydrometeors; Convective activity; Mesoscale convective systems; Condensation; Radiative heating; Weather; Ice; Rainfall; Simulation; Meteorology; Particulates; Minerals; Simulation Analysis; Dusts; Niger, Niamey; Niger DO - http://dx.doi.org/10.1002/qj.2286 ER - TY - JOUR T1 - Identification of primary amines in Titan tholins using microchip nonaqueous capillary electrophoresis AN - 1618135349; 2014-085106 AB - Titan, the moon of Saturn with a thick atmosphere and an active hydrocarbon-based weather cycle, is considered the best target in the solar system for the study of organic chemistry on a planetary scale. Microfluidic devices that employ liquid phase techniques such as capillary electrophoresis with ultrasensitive laser-induced fluorescence detection offer a unique solution for in situ analysis of complex organics on Titan. We previously reported a protocol for nonaqueous microfluidic analysis of primary aliphatic amines in ethanol, and demonstrated separations of short- and long-chain amines down to -20 degrees C. We have optimized this protocol further, and used it to analyze Titan aerosol analogues (tholins) generated in two separate laboratories under a variety of different conditions. Ethylamine was a major product in all samples, though significant differences in amine content were observed, in particular for long-chain amines (C12-C27). This work validates microfluidic chemical analysis of complex organics with relevance to Titan, and represents a significant first step in understanding tholin composition via targeted functional group analysis. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Cable, M L AU - Horst, S M AU - He, C AU - Stockton, A M AU - Mora, M F AU - Tolbert, M A AU - Smith, M A AU - Willis, P A Y1 - 2014/10/01/ PY - 2014 DA - 2014 Oct 01 SP - 99 EP - 107 PB - Elsevier, Amsterdam VL - 403 SN - 0012-821X, 0012-821X KW - liquid phase KW - tholins KW - icy satellites KW - experimental studies KW - biochemistry KW - separation KW - electrophoresis KW - astrobiology KW - fluid phase KW - laboratory studies KW - ethanol KW - organic compounds KW - organic acids KW - amines KW - detection KW - laser-induced fluorescence KW - amino acids KW - capillary electrophoresis KW - alcohols KW - Titan Satellite KW - aerosols KW - ethylamine KW - satellites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618135349?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Identification+of+primary+amines+in+Titan+tholins+using+microchip+nonaqueous+capillary+electrophoresis&rft.au=Cable%2C+M+L%3BHorst%2C+S+M%3BHe%2C+C%3BStockton%2C+A+M%3BMora%2C+M+F%3BTolbert%2C+M+A%3BSmith%2C+M+A%3BWillis%2C+P+A&rft.aulast=Cable&rft.aufirst=M&rft.date=2014-10-01&rft.volume=403&rft.issue=&rft.spage=99&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.06.028 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 - 64 N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-10-30 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - aerosols; alcohols; amines; amino acids; astrobiology; biochemistry; capillary electrophoresis; detection; electrophoresis; ethanol; ethylamine; experimental studies; fluid phase; icy satellites; laboratory studies; laser-induced fluorescence; liquid phase; organic acids; organic compounds; satellites; separation; tholins; Titan Satellite DO - http://dx.doi.org/10.1016/j.epsl.2014.06.028 ER - TY - JOUR T1 - Olivine in terminal particles of Stardust aerogel tracks and analogous grains in chondrite matrix AN - 1618131882; 2014-086870 AB - The dearth of both major and minor element analyses of anhydrous silicate phases in chondrite matrix has thus far hindered their comparison to the Wild 2 samples. We present 68 analyses of olivine (Fa (sub 0-97) ) in the coarse-grained terminal particles of Stardust aerogel tracks and a comprehensive dataset (>10 (super 3) analyses) of analogous olivine grains (5-30 mu m) isolated in CI, CM, CR, CH, CO, CV3-oxidized, CV3-reduced, C3-ungrouped (Acfer 094 and Ningqiang), L/LL 3.0-4, EH3, and Kakangari chondrite matrix. These compositions reveal that Wild 2 likely accreted a diverse assortment of material that was radially transported from various carbonaceous and ordinary chondrite-forming regions. The Wild 2 olivine includes amoeboid olivine aggregates (AOAs), refractory forsterite, type I and type II chondrule fragments and/or microchondrules, and rare relict grain compositions. In addition, we have identified one terminal particle that has no known compositional analog in the meteorite record and may be a signature of low-temperature, aqueous processing in the Kuiper Belt. The generally low Cr content of FeO-rich olivine in the Stardust samples indicates that they underwent mild thermal metamorphism, akin to a petrologic grade of 3.05-3.15. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Frank, David R AU - Zolensky, Michael E AU - Le, Loan Y1 - 2014/10/01/ PY - 2014 DA - 2014 Oct 01 SP - 240 EP - 259 PB - Elsevier, New York, NY VL - 142 SN - 0016-7037, 0016-7037 KW - silicates KW - Ningqiang Meteorite KW - stony meteorites KW - aerogels KW - Kuiper Belt KW - olivine group KW - electron probe data KW - meteorites KW - mineral composition KW - major elements KW - olivine KW - orthosilicates KW - spectra KW - chondrites KW - chemical composition KW - minor elements KW - Stardust Mission KW - textures KW - matrix KW - Acfer Meteorites KW - thermal metamorphism KW - carbonaceous chondrites KW - metamorphism KW - X-ray spectra KW - TEM data KW - EDS spectra KW - nesosilicates KW - CK chondrites KW - particles KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618131882?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Olivine+in+terminal+particles+of+Stardust+aerogel+tracks+and+analogous+grains+in+chondrite+matrix&rft.au=Frank%2C+David+R%3BZolensky%2C+Michael+E%3BLe%2C+Loan&rft.aulast=Frank&rft.aufirst=David&rft.date=2014-10-01&rft.volume=142&rft.issue=&rft.spage=240&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.05.037 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 - 108 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-10-30 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - Acfer Meteorites; aerogels; carbonaceous chondrites; chemical composition; chondrites; CK chondrites; EDS spectra; electron probe data; Kuiper Belt; major elements; matrix; metamorphism; meteorites; mineral composition; minor elements; nesosilicates; Ningqiang Meteorite; olivine; olivine group; orthosilicates; particles; silicates; spectra; Stardust Mission; stony meteorites; TEM data; textures; thermal metamorphism; X-ray spectra DO - http://dx.doi.org/10.1016/j.gca.2014.05.037 ER - TY - JOUR T1 - Advances in exoplanet science from Kepler AN - 1689591368; 2015-057122 JF - Nature (London) AU - Lissauer, Jack J AU - Dawson, Rebekah I AU - Tremaine, Scott AU - Sage, Leslie Y1 - 2014/09/18/ PY - 2014 DA - 2014 Sep 18 SP - 336 EP - 344 PB - Macmillan Journals, London VL - 513 IS - 7518 SN - 0028-0836, 0028-0836 KW - planets KW - detection KW - extrasolar planets KW - telescope methods KW - stars KW - orbits KW - space photography KW - terrestrial comparison KW - size KW - remote sensing KW - Kepler Space Telescope KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591368?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Advances+in+exoplanet+science+from+Kepler&rft.au=Lissauer%2C+Jack+J%3BDawson%2C+Rebekah+I%3BTremaine%2C+Scott%3BSage%2C+Leslie&rft.aulast=Lissauer&rft.aufirst=Jack&rft.date=2014-09-18&rft.volume=513&rft.issue=7518&rft.spage=336&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature13781 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 - 128 N1 - Document feature - illus. N1 - Last updated - 2015-06-18 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - detection; extrasolar planets; Kepler Space Telescope; orbits; planets; remote sensing; size; space photography; stars; telescope methods; terrestrial comparison DO - http://dx.doi.org/10.1038/nature13781 ER - TY - JOUR T1 - Assessing the origins of aliphatic amines in the Murchison Meteorite from their compound-specific carbon isotopic ratios and enantiomeric composition AN - 1623261209; 2014-089258 AB - The study of meteoritic organic compounds provides a unique window into the chemical inventory of the early Solar System and prebiotic chemistry that may have been important for the origin of life on Earth. Multiple families of organic compounds have been extracted from the Murchison meteorite, which is one of the most thoroughly studied carbonaceous chondrites. The amino acids extracted from Murchison have been extensively analyzed, including measurements of non-terrestrial stable isotopic ratios and discoveries of l-enantiomeric excesses for alpha -dialkyl amino acids, notably isovaline. However, although the isotopic signatures of bulk amine-containing fractions have been measured, the isotopic ratios and enantiomeric composition of individual aliphatic amines, compounds that are structurally related to amino acids, remain unknown. Here, we report a novel method for the extraction, separation, identification and quantitation of aliphatic monoamines extracted from the Murchison meteorite. Our results show a complete suite of structural isomers, with a larger concentration of methylamine and ethylamine and decreasing amine concentrations with increasing carbon number. The carbon isotopic compositions of fourteen meteoritic aliphatic monoamines were measured, with delta (super 13) C values ranging from +21 ppm to +129 ppm, showing a decrease in (super 13) C with increasing carbon number, a relationship that may be consistent with the chain elongation mechanism under kinetic control previously proposed for meteoritic amino acids. We also found the enantiomeric composition of sec-butylamine, a structural analog to isovaline, was racemic within error, while the isovaline extracted from the same Murchison piece showed an l-enantiomeric excess of 9.7%; this result suggested that processes leading to enantiomeric excess in the amino acid did not affect the amine. We used these collective data to assess the primordial synthetic origins of these meteoritic aliphatic amines and their potential linkage to meteoritic amino acids. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Aponte, Jose C AU - Dworkin, Jason P AU - Elsila, Jamie E Y1 - 2014/09/15/ PY - 2014 DA - 2014 Sep 15 SP - 331 EP - 345 PB - Elsevier, New York, NY VL - 141 SN - 0016-7037, 0016-7037 KW - stony meteorites KW - isotopes KW - aliphatic amines KW - gas chromatograms KW - mass spectra KW - stable isotopes KW - Murchison Meteorite KW - meteorites KW - amines KW - enantiomeric composition KW - carbon KW - amino acids KW - spectra KW - chondrites KW - chemical composition KW - synthetic materials KW - solar system KW - isotope ratios KW - biochemistry KW - C-13/C-12 KW - cosmochemistry KW - carbonaceous chondrites KW - molecular structure KW - organic compounds KW - organic acids KW - chromatograms KW - CM chondrites KW - 05B:Petrology of meteorites and tektites KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623261209?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Assessing+the+origins+of+aliphatic+amines+in+the+Murchison+Meteorite+from+their+compound-specific+carbon+isotopic+ratios+and+enantiomeric+composition&rft.au=Aponte%2C+Jose+C%3BDworkin%2C+Jason+P%3BElsila%2C+Jamie+E&rft.aulast=Aponte&rft.aufirst=Jose&rft.date=2014-09-15&rft.volume=141&rft.issue=&rft.spage=331&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.06.035 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 - 88 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-11-13 N1 - SubjectsTermNotLitGenreText - aliphatic amines; amines; amino acids; biochemistry; C-13/C-12; carbon; carbonaceous chondrites; chemical composition; chondrites; chromatograms; CM chondrites; cosmochemistry; enantiomeric composition; gas chromatograms; isotope ratios; isotopes; mass spectra; meteorites; molecular structure; Murchison Meteorite; organic acids; organic compounds; solar system; spectra; stable isotopes; stony meteorites; synthetic materials DO - http://dx.doi.org/10.1016/j.gca.2014.06.035 ER - TY - JOUR T1 - The Vesta gravity field, spin pole and rotation period, landmark positions, and ephemeris from the Dawn tracking and optical data AN - 1623260968; 2014-089030 AB - The Vesta gravity field and related physical parameters have been precisely measured using 10-months of radiometric Doppler and range data and optical landmark tracking from the Dawn spacecraft. The gravity field, orientation parameters, landmark locations, and Vesta's orbit are jointly estimated. The resulting spherical harmonic gravity field has a half-wavelength resolution of 42 km (degree 20). The gravitational mass uncertainty is nearly 1 part in 10 (super 6) . The inertial spin pole location is determined to better than 0.0001 degrees and the uncertainty in the rotation period has been reduced by nearly a factor of 100. The combined precession and nutation of the pole of Vesta has been detected with angular rates about 70% of expected values, but not well enough to constrain the moment of inertia. The optical landmark position estimates reduce the uncertainty in the center-of-mass and center-of-figure offset to 10 m. The Vesta ephemeris uncertainty during the Dawn stay was reduced from 20 km to better than 10 m in the Earth-Vesta direction. JF - Icarus AU - Konopliv, Alexander S AU - Asmar, Sami W AU - Park, Ryan S AU - Bills, Bruce G AU - Centinello, F AU - Chamberlin, A B AU - Ermakov, Anton I AU - Gaskell, R W AU - Rambaux, N AU - Raymond, C A AU - Russell, C T AU - Smith, D E AU - Tricarico, P AU - Zuber, M T Y1 - 2014/09/15/ PY - 2014 DA - 2014 Sep 15 SP - 103 EP - 117 PB - Elsevier, New York, NY VL - 240 SN - 0019-1035, 0019-1035 KW - asteroids KW - Vesta Asteroid KW - orbits KW - pole positions KW - precession KW - Dawn Mission KW - spherical harmonic analysis KW - gravity anomalies KW - gravity field KW - ephemeris KW - detection KW - rotation KW - Bouguer anomalies KW - periodicity KW - nutation KW - uncertainty KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623260968?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+Vesta+gravity+field%2C+spin+pole+and+rotation+period%2C+landmark+positions%2C+and+ephemeris+from+the+Dawn+tracking+and+optical+data&rft.au=Konopliv%2C+Alexander+S%3BAsmar%2C+Sami+W%3BPark%2C+Ryan+S%3BBills%2C+Bruce+G%3BCentinello%2C+F%3BChamberlin%2C+A+B%3BErmakov%2C+Anton+I%3BGaskell%2C+R+W%3BRambaux%2C+N%3BRaymond%2C+C+A%3BRussell%2C+C+T%3BSmith%2C+D+E%3BTricarico%2C+P%3BZuber%2C+M+T&rft.aulast=Konopliv&rft.aufirst=Alexander&rft.date=2014-09-15&rft.volume=240&rft.issue=&rft.spage=103&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.09.005 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 53 N1 - PubXState - NY N1 - Document feature - illus. incl. 7 tables, sketch maps N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - asteroids; Bouguer anomalies; Dawn Mission; detection; ephemeris; gravity anomalies; gravity field; nutation; orbits; periodicity; pole positions; precession; rotation; spherical harmonic analysis; uncertainty; Vesta Asteroid DO - http://dx.doi.org/10.1016/j.icarus.2013.09.005 ER - TY - JOUR T1 - Spectral analysis of the bright materials on the asteroid Vesta AN - 1623260050; 2014-089028 AB - Vesta spectra have prominent near-infrared absorption bands characteristic of pyroxenes, indicating a direct link to the howardite, eucrite and diogenite meteorites. Many localized dark and bright materials are present on Vesta's surface. Here we focus on the bright material (BM) units to determine their spectral properties, their origin, the presence of mineralogical phases different from pyroxenes, and whether different bright units share a common lithology. VIR, the Visible and Infrared spectrometer onboard Dawn, allows us to first do a detailed analysis of the spectral properties of a large number of bright material units on Vesta including examples of the different morphological classes. The spectral parameters used are band centers, band depths, and Band Area Ratio (BAR) for the pyroxene bands at approximately 0.9 and approximately 1.9 mu m. The mineralogies of most bright regions are consistent with those of the howardite, eucrite and diogenite meteorites typical of Vesta's surface. We find that bright material units exhibit the full range of HED pyroxene composition, from eucrites to diogenites. Large part of the bright materials are eucrite-rich, according with the Vesta's mineralogy. In most cases, the bright materials have the same mineralogy of the surrounding terrain, but have larger band depth values. The band depths can be related to the abundance of the absorbing minerals, the abundance of Fe (super 2+) , grain size, and/or to the abundance of opaque materials. We found a positive correlation between albedo and band depth, which suggests that the grain size is not the main factor responsible for the higher albedo. The analysis of the band parameters indicates that most of the bright materials, excluding the few olivine-rich units, represent fresh uncontaminated Vestan pyroxenes from a variety of lithologies exposed from beneath the surface by impacts. JF - Icarus AU - Zambon, Francesca AU - De Sanctis, Maria Cristina AU - Schroeder, Stefan E AU - Tosi, Federico AU - Longobardo, Andrea AU - Ammannito, Eleonora AU - Blewett, David T AU - Mittlefehldt, David W AU - Li, Jian-Yang AU - Palomba, Ernesto AU - Capaccioni, Fabrizio AU - Frigeri, Alessandro AU - Capria, Maria Teresa AU - Fonte, Sergio AU - Nathues, Andreas AU - Pieters, Carle M AU - Russell, Christopher T AU - Raymond, Carol A Y1 - 2014/09/15/ PY - 2014 DA - 2014 Sep 15 SP - 73 EP - 85 PB - Elsevier, New York, NY VL - 240 SN - 0019-1035, 0019-1035 KW - silicates KW - albedo KW - near-infrared spectra KW - stony meteorites KW - asteroids KW - band depth KW - Dawn Mission KW - iron KW - brightness KW - meteorites KW - pyroxene group KW - mineral composition KW - howardite KW - surface features KW - spectra KW - opaque minerals KW - chain silicates KW - Vesta Asteroid KW - grain size KW - diogenite KW - achondrites KW - weathering KW - ferrous iron KW - space weathering KW - metals KW - eucrite KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623260050?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Spectral+analysis+of+the+bright+materials+on+the+asteroid+Vesta&rft.au=Zambon%2C+Francesca%3BDe+Sanctis%2C+Maria+Cristina%3BSchroeder%2C+Stefan+E%3BTosi%2C+Federico%3BLongobardo%2C+Andrea%3BAmmannito%2C+Eleonora%3BBlewett%2C+David+T%3BMittlefehldt%2C+David+W%3BLi%2C+Jian-Yang%3BPalomba%2C+Ernesto%3BCapaccioni%2C+Fabrizio%3BFrigeri%2C+Alessandro%3BCapria%2C+Maria+Teresa%3BFonte%2C+Sergio%3BNathues%2C+Andreas%3BPieters%2C+Carle+M%3BRussell%2C+Christopher+T%3BRaymond%2C+Carol+A&rft.aulast=Zambon&rft.aufirst=Francesca&rft.date=2014-09-15&rft.volume=240&rft.issue=&rft.spage=73&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.04.037 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 75 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - achondrites; albedo; asteroids; band depth; brightness; chain silicates; Dawn Mission; diogenite; eucrite; ferrous iron; grain size; howardite; iron; metals; meteorites; mineral composition; near-infrared spectra; opaque minerals; pyroxene group; silicates; space weathering; spectra; stony meteorites; surface features; Vesta Asteroid; weathering DO - http://dx.doi.org/10.1016/j.icarus.2014.04.037 ER - TY - JOUR T1 - Thermal measurements of dark and bright surface features on Vesta as derived from Dawn/VIR AN - 1623259423; 2014-089026 AB - Remote sensing data acquired during Dawn's orbital mission at Vesta showed several local concentrations of high-albedo (bright) and low-albedo (dark) material units, in addition to spectrally distinct meteorite impact ejecta. The thermal behavior of such areas seen at local scale (1-10 km) is related to physical properties that can provide information about the origin of those materials. We use Dawn's Visible and InfraRed (VIR) mapping spectrometer hyperspectral data to retrieve surface temperatures and emissivities, with high accuracy as long as temperatures are greater than 220 K. Some of the dark and bright features were observed multiple times by VIR in the various mission phases at variable spatial resolution, illumination and observation angles, local solar time, and heliocentric distance. This work presents the first temperature maps and spectral emissivities of several kilometer-scale dark and bright material units on Vesta. Results retrieved from the infrared data acquired by VIR show that bright regions generally correspond to regions with lower temperature, while dark regions correspond to areas with higher temperature. During maximum daily insolation and in the range of heliocentric distances explored by Dawn, i.e. 2.23-2.54 AU, the warmest dark unit found on Vesta rises to a temperature of 273 K, while bright units observed under comparable conditions do not exceed 266 K. Similarly, dark units appear to have higher emissivity on average compared to bright units. Dark-material units show a weak anticorrelation between temperature and albedo, whereas the relation is stronger for bright material units observed under the same conditions. Individual features may show either evanescent or distinct margins in the thermal images, as a consequence of the cohesion of the surface material. Finally, for the two categories of dark and bright materials, we were able to highlight the influence of heliocentric distance on surface temperatures, and estimate an average temperature rate change of 1% following a variation of 0.04 AU in the solar distance. JF - Icarus AU - Tosi, Federico AU - Capria, Maria Teresa AU - De Sanctis, Maria Cristina AU - Combe, Jean-Philippe AU - Zambon, Francesca AU - Nathues, Andreas AU - Schroeder, S E AU - Li, J Y AU - Palomba, Ernesto AU - Longobardo, Andrea AU - Blewett, David T AU - Denevi, B W AU - Palmer, E AU - Capaccioni, Fabrizio AU - Ammannito, Eleonora AU - Titus, T M AU - Mittlefehldt, David W AU - Sunshine, J M AU - Russell, C T AU - Raymond, C A Y1 - 2014/09/15/ PY - 2014 DA - 2014 Sep 15 SP - 36 EP - 57 PB - Elsevier, New York, NY VL - 240 SN - 0019-1035, 0019-1035 KW - albedo KW - spectrophotometry KW - hyperspectral analysis KW - asteroids KW - Vesta Asteroid KW - thermal properties KW - Visible and InfraRed mapping spectrometer KW - Dawn Mission KW - emissivity KW - temperature KW - VIR instrument KW - photometry KW - surface features KW - ground-surface temperature KW - diurnal variations KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623259423?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Thermal+measurements+of+dark+and+bright+surface+features+on+Vesta+as+derived+from+Dawn%2FVIR&rft.au=Tosi%2C+Federico%3BCapria%2C+Maria+Teresa%3BDe+Sanctis%2C+Maria+Cristina%3BCombe%2C+Jean-Philippe%3BZambon%2C+Francesca%3BNathues%2C+Andreas%3BSchroeder%2C+S+E%3BLi%2C+J+Y%3BPalomba%2C+Ernesto%3BLongobardo%2C+Andrea%3BBlewett%2C+David+T%3BDenevi%2C+B+W%3BPalmer%2C+E%3BCapaccioni%2C+Fabrizio%3BAmmannito%2C+Eleonora%3BTitus%2C+T+M%3BMittlefehldt%2C+David+W%3BSunshine%2C+J+M%3BRussell%2C+C+T%3BRaymond%2C+C+A&rft.aulast=Tosi&rft.aufirst=Federico&rft.date=2014-09-15&rft.volume=240&rft.issue=&rft.spage=36&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.03.017 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 60 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - albedo; asteroids; Dawn Mission; diurnal variations; emissivity; ground-surface temperature; hyperspectral analysis; photometry; remote sensing; spectrophotometry; surface features; temperature; thermal properties; Vesta Asteroid; VIR instrument; Visible and InfraRed mapping spectrometer DO - http://dx.doi.org/10.1016/j.icarus.2014.03.017 ER - TY - JOUR T1 - MAGNETIC FIELD FLUCTUATIONS OBSERVED IN THE HELIOSHEATH AND INTERSTELLAR MAGNETIC FIELD BY VOYAGER 1 AT 115.7-124.9 AU DURING 2011-2013 AN - 1709173010; PQ0001859583 AB - We discuss microscale fluctuations of the hour averages of the magnetic field B observed on a scale of one day by Voyager 1 (V1) from 2011.0 to 2012.3143 (when it was within the distant heliosheath, where the average magnetic field strength [left angle bracket]B[right angle bracket] = 0.17 nT) and during the interval from 2012.6503 to 2013.5855 (when it was within the interstellar plasma with [left angle bracket]B[right angle bracket] = 0.47 nT). In both regions, the fluctuations were primarily compressive fluctuations, varying along the average B ([asymptotically =]T direction in RTN coordinates). In the heliosheath, the average of the daily standard deviations (SDs) of the compressive and transverse components of B were [left angle bracket]SD sub(c)[right angle bracket] = 0.010 nT and [left angle bracket]SD sub(t)[right angle bracket] [< or =, slant] 0.005 nT (which is the limit of the measurement). In the distant heliosheath [left angle bracket]SD sub(c)[right angle bracket]/[left angle bracket]B[right angle bracket] = 0.06, and the distributions of SD were skewed and highly kurtotic. The interstellar magnetic field (ISMF) strength was B = 0.48 nT, but the fluctuations were below the limit of measurement: [left angle bracket]SD sub(c)[right angle bracket] = 0.004 nT and [left angle bracket]abs(SD sub(t))[right angle bracket] = 0.004 nT. The distributions of these interstellar SDs have skewness and kurtosis consistent with a Gaussian noise distribution. We also discuss the fluctuations of 48 s averages of B on a scale of 1 day during a 30 day interval when V1 was observing the ISMF. For the fluctuations in all three components of B, SD = 0.010 nT, which gives an upper limit on the fluctuations of the ISMF on the scales observed by V1. This SD rules out the possibility that there is significant power in electromagnetic fluctuations generated by pickup ion ring instabilities at these scales, which strongly constrains models of the IBEX ribbon. JF - Astrophysical Journal AU - BURLAGA, L F AU - Ness, N F AU - FLORINSKI, V AU - HEERIKHUISEN, J AD - NASA Goddard Space Flight Center, Code 673, Greenbelt, MD 20771, USA, lburlagahsp@verizon.net Y1 - 2014/09/10/ PY - 2014 DA - 2014 Sep 10 SP - 1 EP - 10 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 792 IS - 2 SN - 0004-637X, 0004-637X KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - instabilities KW - ISM: kinematics and dynamics KW - solar wind KW - turbulence KW - Magnetic fields KW - Acoustic waves KW - Interstellar magnetic fields KW - Noise pollution KW - Instability KW - P 7000:NOISE KW - M2 550.38:Geomagnetism (550.38) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709173010?accountid=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=MAGNETIC+FIELD+FLUCTUATIONS+OBSERVED+IN+THE+HELIOSHEATH+AND+INTERSTELLAR+MAGNETIC+FIELD+BY+VOYAGER+1+AT+115.7-124.9+AU+DURING+2011-2013&rft.au=BURLAGA%2C+L+F%3BNess%2C+N+F%3BFLORINSKI%2C+V%3BHEERIKHUISEN%2C+J&rft.aulast=BURLAGA&rft.aufirst=L&rft.date=2014-09-10&rft.volume=792&rft.issue=2&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F792%2F2%2F134 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Magnetic fields; Acoustic waves; Interstellar magnetic fields; Noise pollution; Instability DO - http://dx.doi.org/10.1088/0004-637X/792/2/134 ER - TY - CPAPER T1 - Transmission loss and absorption of corrugated core sandwich panels with embedded resonators T2 - 2014 National Conference on Noise Control Engineering (Noise-Con 2014) AN - 1645184229; 6321623 JF - 2014 National Conference on Noise Control Engineering (Noise-Con 2014) AU - Allen, Albert AU - Schiller, Noah AU - Zalewski, Bart AU - Rosenthal, Bruce Y1 - 2014/09/08/ PY - 2014 DA - 2014 Sep 08 KW - Absorption KW - Transmission loss UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645184229?accountid=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+National+Conference+on+Noise+Control+Engineering+%28Noise-Con+2014%29&rft.atitle=Transmission+loss+and+absorption+of+corrugated+core+sandwich+panels+with+embedded+resonators&rft.au=Allen%2C+Albert%3BSchiller%2C+Noah%3BZalewski%2C+Bart%3BRosenthal%2C+Bruce&rft.aulast=Allen&rft.aufirst=Albert&rft.date=2014-09-08&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+National+Conference+on+Noise+Control+Engineering+%28Noise-Con+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.inceusa.org/nc14/documents/NC14_Program_UPDATED9-4-2014.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - An evaluation of the additional acoustic power needed to overcome the effects of a test article's absorption during reverberant chamber acoustic testing of spaceflight hardware T2 - 2014 National Conference on Noise Control Engineering (Noise-Con 2014) AN - 1645184223; 6321624 JF - 2014 National Conference on Noise Control Engineering (Noise-Con 2014) AU - Hozman, Aron AU - Hughes, William Y1 - 2014/09/08/ PY - 2014 DA - 2014 Sep 08 KW - Space flight KW - Acoustics KW - Absorption UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645184223?accountid=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+National+Conference+on+Noise+Control+Engineering+%28Noise-Con+2014%29&rft.atitle=An+evaluation+of+the+additional+acoustic+power+needed+to+overcome+the+effects+of+a+test+article%27s+absorption+during+reverberant+chamber+acoustic+testing+of+spaceflight+hardware&rft.au=Hozman%2C+Aron%3BHughes%2C+William&rft.aulast=Hozman&rft.aufirst=Aron&rft.date=2014-09-08&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+National+Conference+on+Noise+Control+Engineering+%28Noise-Con+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.inceusa.org/nc14/documents/NC14_Program_UPDATED9-4-2014.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Acoustic test results of melamine foam with application to payload fairing acoustic attenuation systems T2 - 2014 National Conference on Noise Control Engineering (Noise-Con 2014) AN - 1645183246; 6321622 JF - 2014 National Conference on Noise Control Engineering (Noise-Con 2014) AU - Hughes, William AU - Mc- Neilis, Anne Y1 - 2014/09/08/ PY - 2014 DA - 2014 Sep 08 KW - Acoustics KW - Foams KW - melamine KW - Fairings UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645183246?accountid=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+National+Conference+on+Noise+Control+Engineering+%28Noise-Con+2014%29&rft.atitle=Acoustic+test+results+of+melamine+foam+with+application+to+payload+fairing+acoustic+attenuation+systems&rft.au=Hughes%2C+William%3BMc-+Neilis%2C+Anne&rft.aulast=Hughes&rft.aufirst=William&rft.date=2014-09-08&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+National+Conference+on+Noise+Control+Engineering+%28Noise-Con+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.inceusa.org/nc14/documents/NC14_Program_UPDATED9-4-2014.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - JOUR T1 - Final reports of the Stardust Interstellar Preliminary Examination AN - 1696877884; 2015-068970 AB - With the discovery of bona fide extraterrestrial materials in the Stardust Interstellar Dust Collector, NASA now has a fundamentally new returned sample collection, after the Apollo, Antarctic meteorite, Cosmic Dust, Genesis, Stardust Cometary, Hayabusa, and Exposed Space Hardware samples. Here, and in companion papers in this volume, we present the results from the Preliminary Examination of this collection, the Stardust Interstellar Preliminary Examination (ISPE). We found extraterrestrial materials in two tracks in aerogel whose trajectories and morphology are consistent with an origin in the interstellar dust stream, and in residues in four impacts in the aluminum foil collectors. While the preponderance of evidence, described in detail in companion papers in this volume, points toward an interstellar origin for some of these particles, alternative origins have not yet been eliminated, and definitive tests through isotopic analyses were not allowed under the terms of the ISPE. In this summary, we answer the central questions of the ISPE: How many tracks in the collector are consistent in their morphology and trajectory with interstellar particles? How many of these potential tracks are consistent with real interstellar particles, based on chemical analysis? Conversely, what fraction of candidates are consistent with either a secondary or interplanetary origin? What is the mass distribution of these particles, and what is their state? Are they particulate or diffuse? Is there any crystalline material? How many detectable impact craters (>100 nm) are there in the foils, and what is their size distribution? How many of these craters have analyzable residue that is consistent with extraterrestrial material? And finally, can craters from secondaries be recognized through crater morphology (e.g., ellipticity)? Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Westphal, Andrew J AU - Bechtel, Hans A AU - Brenker, Frank E AU - Butterworth, Anna L AU - Flynn, George J AU - Frank, David R AU - Gainsforth, Zack AU - Hillier, Jon K AU - Postberg, Frank AU - Simionovici, Alexandre S AU - Sterken, Veerle J AU - Stroud, Rhonda M AU - Allen, Carlton AU - Anderson, David AU - Ansari, Asna AU - Bajt, Sasa AU - Bastien, Ron K AU - Bassim, Nabil AU - Borg, Janet AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Burghammer, Manfred AU - Changela, Hitesh AU - Cloetens, Peter AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Gruen, Eberhard AU - Heck, Philipp R AU - Hoppe, Peter AU - Hudson, Bruce AU - Huth, Joachim AU - Hvide, Brit AU - Kearsley, Anton AU - King, Ashley J AU - Lai, Barry AU - Leitner, Jan AU - Lemelle, Laurence AU - Leroux, Hugues AU - Leonard, Ariel AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Price, Mark C AU - Sandford, Scott A AU - Tresserras, Juan-Angel Sans AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Silversmit, Geert AU - Sole, Vicente A AU - Srama, Ralf AU - Stadermann, Frank J AU - Stephan, Thomas AU - Stodolna, Julien AU - Sutton, Steven AU - Trieloff, Mario AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Tyliszczak, Tolek AU - Vekemans, Bart AU - Vincze, Laszlo AU - Korff, Joshua AU - Wordsworth, Naomi AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1720 EP - 1733 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - particle tracks KW - impact features KW - Stardust Mission KW - trajectories KW - impacts KW - distribution KW - morphology KW - size distribution KW - cosmic dust KW - detection KW - Stardust Interstellar Preliminary Examination KW - identification KW - aluminum foil KW - aerogel KW - impact craters KW - chemical composition KW - interstellar dust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877884?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Final+reports+of+the+Stardust+Interstellar+Preliminary+Examination&rft.au=Westphal%2C+Andrew+J%3BBechtel%2C+Hans+A%3BBrenker%2C+Frank+E%3BButterworth%2C+Anna+L%3BFlynn%2C+George+J%3BFrank%2C+David+R%3BGainsforth%2C+Zack%3BHillier%2C+Jon+K%3BPostberg%2C+Frank%3BSimionovici%2C+Alexandre+S%3BSterken%2C+Veerle+J%3BStroud%2C+Rhonda+M%3BAllen%2C+Carlton%3BAnderson%2C+David%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBastien%2C+Ron+K%3BBassim%2C+Nabil%3BBorg%2C+Janet%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BBurghammer%2C+Manfred%3BChangela%2C+Hitesh%3BCloetens%2C+Peter%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BGruen%2C+Eberhard%3BHeck%2C+Philipp+R%3BHoppe%2C+Peter%3BHudson%2C+Bruce%3BHuth%2C+Joachim%3BHvide%2C+Brit%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLemelle%2C+Laurence%3BLeroux%2C+Hugues%3BLeonard%2C+Ariel%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BTresserras%2C+Juan-Angel+Sans%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSilversmit%2C+Geert%3BSole%2C+Vicente+A%3BSrama%2C+Ralf%3BStadermann%2C+Frank+J%3BStephan%2C+Thomas%3BStodolna%2C+Julien%3BSutton%2C+Steven%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BTyliszczak%2C+Tolek%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3BKorff%2C+Joshua%3BWordsworth%2C+Naomi%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Westphal&rft.aufirst=Andrew&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1720&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12221 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 - 26 N1 - PubXState - AR N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-10-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aerogel; aluminum foil; chemical composition; cosmic dust; detection; distribution; identification; impact craters; impact features; impacts; interstellar dust; morphology; particle tracks; size distribution; Stardust Interstellar Preliminary Examination; Stardust Mission; trajectories DO - http://dx.doi.org/10.1111/maps.12221 ER - TY - JOUR T1 - Stardust interstellar preliminary examination; V, XRF analyses of interstellar dust candidates at ESRF ID13 AN - 1696877624; 2015-068963 AB - Here, we report analyses by synchrotron X-ray fluorescence microscopy of the elemental composition of eight candidate impact features extracted from the Stardust Interstellar Dust Collector (SIDC). Six of the features were unambiguous tracks, and two were crater-like features. Five of the tracks are so-called "midnight" tracks-that is, they had trajectories consistent with an origin either in the interstellar dust stream or as secondaries from impacts on the Sample Return Capsule (SRC). In a companion paper reporting synchrotron X-ray diffraction analyses of ISPE candidates, we show that two of these particles contain natural crystalline materials: the terminal particle of track 30 contains olivine and spinel, and the terminal particle of track 34 contains olivine. Here, we show that the terminal particle of track 30, Orion, shows elemental abundances, normalized to Fe, that are close to CI values, and a complex, fine-grained structure. The terminal particle of track 34, Hylabrook, shows abundances that deviate strongly from CI, but shows little fine structure and is nearly homogenous. The terminal particles of other midnight tracks, 29 and 37, had heavy element abundances below detection threshold. A third, track 28, showed a composition inconsistent with an extraterrestrial origin, but also inconsistent with known spacecraft materials. A sixth track, with a trajectory consistent with secondary ejecta from an impact on one of the spacecraft solar panels, contains abundant Ce and Zn. This is consistent with the known composition of the glass covering the solar panel. Neither crater-like feature is likely to be associated with extraterrestrial materials. We also analyzed blank aerogel samples to characterize background and variability between aerogel tiles. We found significant differences in contamination levels and compositions, emphasizing the need for local background subtraction for accurate quantification. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Brenker, Frank E AU - Westphal, Andrew J AU - Vincze, Laszlo AU - Burghammer, Manfred AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Silversmit, Geert AU - Vekemans, Bart AU - Allen, Carlton AU - Anderson, David AU - Ansari, Asna AU - Bajt, Sasa AU - Bastien, Ron K AU - Bassim, Nabil AU - Bechtel, Hans A AU - Borg, Janet AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Butterworth, Anna L AU - Changela, Hitesh AU - Cloetens, Peter AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Flynn, George J AU - Fougeray, Patrick AU - Frank, David R AU - Gainsforth, Zack AU - Gruen, Eberhard AU - Heck, Philipp R AU - Hillier, Jon K AU - Hoppe, Peter AU - Hudson, Bruce AU - Huth, Joachim AU - Hvide, Brit AU - Kearsley, Anton AU - King, Ashley J AU - Lai, Barry AU - Leitner, Jan AU - Lemelle, Laurence AU - Leroux, Hugues AU - Leonard, Ariel AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Postberg, Frank AU - Price, Mark C AU - Sandford, Scott A AU - Tresserras, Juan-Angel Sans AU - Simionovici, Alexandre S AU - Sole, Vicente A AU - Srama, Ralf AU - Stadermann, Frank J AU - Stephan, Thomas AU - Sterken, Veerle J AU - Stodolna, Julien AU - Stroud, Rhonda M AU - Sutton, Steven AU - Trieloff, Mario AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Tyliszczak, Tolek AU - Korff, Joshua AU - Wordsworth, Naomi AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1594 EP - 1611 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - silicates KW - particle tracks KW - stony meteorites KW - impact features KW - olivine group KW - crystal structure KW - iron KW - synchrotron radiation KW - meteorites KW - Stardust Interstellar Preliminary Examination KW - spacecraft KW - olivine KW - orthosilicates KW - X-ray fluorescence spectra KW - oxides KW - spectra KW - chondrites KW - chemical composition KW - interstellar dust KW - CI chondrites KW - Stardust Mission KW - trajectories KW - spinel KW - carbonaceous chondrites KW - nesosilicates KW - sample preparation KW - cosmic dust KW - metals KW - fine-grained materials KW - aerogel KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877624?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stardust+interstellar+preliminary+examination%3B+V%2C+XRF+analyses+of+interstellar+dust+candidates+at+ESRF+ID13&rft.au=Brenker%2C+Frank+E%3BWestphal%2C+Andrew+J%3BVincze%2C+Laszlo%3BBurghammer%2C+Manfred%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSilversmit%2C+Geert%3BVekemans%2C+Bart%3BAllen%2C+Carlton%3BAnderson%2C+David%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBastien%2C+Ron+K%3BBassim%2C+Nabil%3BBechtel%2C+Hans+A%3BBorg%2C+Janet%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BButterworth%2C+Anna+L%3BChangela%2C+Hitesh%3BCloetens%2C+Peter%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BFlynn%2C+George+J%3BFougeray%2C+Patrick%3BFrank%2C+David+R%3BGainsforth%2C+Zack%3BGruen%2C+Eberhard%3BHeck%2C+Philipp+R%3BHillier%2C+Jon+K%3BHoppe%2C+Peter%3BHudson%2C+Bruce%3BHuth%2C+Joachim%3BHvide%2C+Brit%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLemelle%2C+Laurence%3BLeroux%2C+Hugues%3BLeonard%2C+Ariel%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPostberg%2C+Frank%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BTresserras%2C+Juan-Angel+Sans%3BSimionovici%2C+Alexandre+S%3BSole%2C+Vicente+A%3BSrama%2C+Ralf%3BStadermann%2C+Frank+J%3BStephan%2C+Thomas%3BSterken%2C+Veerle+J%3BStodolna%2C+Julien%3BStroud%2C+Rhonda+M%3BSutton%2C+Steven%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BTyliszczak%2C+Tolek%3BKorff%2C+Joshua%3BWordsworth%2C+Naomi%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Brenker&rft.aufirst=Frank&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1594&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12206 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 - 28 N1 - PubXState - AR N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-10-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aerogel; carbonaceous chondrites; chemical composition; chondrites; CI chondrites; cosmic dust; crystal structure; fine-grained materials; impact features; interstellar dust; iron; metals; meteorites; nesosilicates; olivine; olivine group; orthosilicates; oxides; particle tracks; sample preparation; silicates; spacecraft; spectra; spinel; Stardust Interstellar Preliminary Examination; Stardust Mission; stony meteorites; synchrotron radiation; trajectories; X-ray fluorescence spectra DO - http://dx.doi.org/10.1111/maps.12206 ER - TY - JOUR T1 - Stardust Interstellar Preliminary Examination, VI, Quantitative elemental analysis by synchrotron X-ray fluorescence nanoimaging of eight impact features in aerogel AN - 1696877025; 2015-068964 AB - Hard X-ray, quantitative, fluorescence elemental imaging was performed on the ID22NI nanoprobe and ID22 microprobe beam lines of the European Synchrotron Research facility (ESRF) in Grenoble, France, on eight interstellar candidate impact features in the framework of the NASA Stardust Interstellar Preliminary Examination (ISPE). Three features were unambiguous tracks, and the other five were identified as possible, but not definite, impact features. Overall, we produced an absolute quantification of elemental abundances in the 15 12). Orion was a highly heterogeneous Fe-bearing particle and contained about 59 fg of heavy elements located in hundred nanometer phases, forming an irregular mantle that surrounded a low-Z core. X-ray diffraction (XRD) measurements revealed Sirius to be amorphous, whereas Orion contained partially crystalline material (Gainsforth et al. 2014). Within the mantle, one grain was relatively Fe-Ni-Mn-rich; other zones were relatively Mn-Cr-Ti-rich and may correspond to different spinel populations. For absolute quantification purposes, Orion was assigned to a mineralogical assemblage of forsterite, spinel, and an unknown Fe-bearing phase, while Sirius was most likely composed of an amorphous Mg-bearing material with minor Ni and Fe. Owing to its nearly chondritic abundances of the nonvolatile elements Ca, Ti, Co, and Ni with respect to Fe, in combination with the presence of olivine and spinel as inferred from XRD measurements, Orion had a high probability of being extraterrestrial in origin. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Simionovici, Alexandre S AU - Lemelle, Laurence AU - Cloetens, Peter AU - Sole, Vicente A AU - Tresserras, Juan-Angel Sans AU - Butterworth, Anna L AU - Westphal, Andrew J AU - Gainsforth, Zack AU - Stodolna, Julien AU - Allen, Carlton AU - Anderson, David AU - Ansari, Asna AU - Bajt, Sasa AU - Bassim, Nabil AU - Bastien, Ron K AU - Bechtel, Hans A AU - Borg, Janet AU - Brenker, Frank E AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Burghammer, Manfred AU - Changela, Hitesh AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Flynn, George J AU - Frank, David R AU - Gruen, Eberhard AU - Heck, Philipp R AU - Hillier, Jon K AU - Hoppe, Peter AU - Hudson, Bruce AU - Huth, Joachim AU - Hvide, Brit AU - Kearsley, Anton AU - King, Ashley J AU - Lai, Barry AU - Leitner, Jan AU - Leonard, Ariel AU - Leroux, Hugues AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Postberg, Frank AU - Price, Mark C AU - Sandford, Scott A AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Silversmit, Geert AU - Srama, Ralf AU - Stadermann, Frank J AU - Stephan, Thomas AU - Sterken, Veerle J AU - Stroud, Rhonda M AU - Sutton, Steven AU - Trieloff, Mario AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Tyliszczak, Tolek AU - Vekemans, Bart AU - Vincze, Laszlo AU - Korff, Joshua AU - Wordsworth, Naomi AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1612 EP - 1625 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - silicates KW - alteration KW - particle tracks KW - imagery KW - impact features KW - olivine group KW - iron KW - synchrotron radiation KW - errors KW - quantitative analysis KW - Stardust Interstellar Preliminary Examination KW - orthosilicates KW - X-ray fluorescence spectra KW - oxides KW - spectra KW - chemical composition KW - interstellar dust KW - X-ray fluorescence KW - Stardust Mission KW - spinel KW - forsterite KW - nesosilicates KW - cosmic dust KW - metals KW - nickel KW - aerogel KW - corrections KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877025?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stardust+Interstellar+Preliminary+Examination%2C+VI%2C+Quantitative+elemental+analysis+by+synchrotron+X-ray+fluorescence+nanoimaging+of+eight+impact+features+in+aerogel&rft.au=Simionovici%2C+Alexandre+S%3BLemelle%2C+Laurence%3BCloetens%2C+Peter%3BSole%2C+Vicente+A%3BTresserras%2C+Juan-Angel+Sans%3BButterworth%2C+Anna+L%3BWestphal%2C+Andrew+J%3BGainsforth%2C+Zack%3BStodolna%2C+Julien%3BAllen%2C+Carlton%3BAnderson%2C+David%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBassim%2C+Nabil%3BBastien%2C+Ron+K%3BBechtel%2C+Hans+A%3BBorg%2C+Janet%3BBrenker%2C+Frank+E%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BBurghammer%2C+Manfred%3BChangela%2C+Hitesh%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BFlynn%2C+George+J%3BFrank%2C+David+R%3BGruen%2C+Eberhard%3BHeck%2C+Philipp+R%3BHillier%2C+Jon+K%3BHoppe%2C+Peter%3BHudson%2C+Bruce%3BHuth%2C+Joachim%3BHvide%2C+Brit%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLeonard%2C+Ariel%3BLeroux%2C+Hugues%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPostberg%2C+Frank%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSilversmit%2C+Geert%3BSrama%2C+Ralf%3BStadermann%2C+Frank+J%3BStephan%2C+Thomas%3BSterken%2C+Veerle+J%3BStroud%2C+Rhonda+M%3BSutton%2C+Steven%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BTyliszczak%2C+Tolek%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3BKorff%2C+Joshua%3BWordsworth%2C+Naomi%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Simionovici&rft.aufirst=Alexandre&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1612&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12208 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 - 29 N1 - PubXState - AR N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-10-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aerogel; alteration; chemical composition; corrections; cosmic dust; errors; forsterite; imagery; impact features; interstellar dust; iron; metals; nesosilicates; nickel; olivine group; orthosilicates; oxides; particle tracks; quantitative analysis; silicates; spectra; spinel; Stardust Interstellar Preliminary Examination; Stardust Mission; synchrotron radiation; X-ray fluorescence; X-ray fluorescence spectra DO - http://dx.doi.org/10.1111/maps.12208 ER - TY - JOUR T1 - Stardust Interstellar Preliminary Examination; IV, Scanning transmission X-ray microscopy analyses of impact features in the Stardust Interstellar Dust Collector AN - 1696876720; 2015-068962 AB - We report the quantitative characterization by synchrotron soft X-ray spectroscopy of 31 potential impact features in the aerogel capture medium of the Stardust Interstellar Dust Collector. Samples were analyzed in aerogel by acquiring high spatial resolution maps and high energy-resolution spectra of major rock-forming elements Mg, Al, Si, Fe, and others. We developed diagnostic screening tests to reject spacecraft secondary ejecta and terrestrial contaminants from further consideration as interstellar dust candidates. The results support an extraterrestrial origin for three interstellar candidates: I1043,1,30 (Orion) is a 3 pg particle with Mg-spinel, forsterite, and an iron-bearing phase. I1047,1,34 (Hylabrook) is a 4 pg particle comprising an olivine core surrounded by low-density, amorphous Mg-silicate and amorphous Fe, Cr, and Mn phases. I1003,1,40 (Sorok) has the track morphology of a high-speed impact, but contains no detectable residue that is convincingly distinguishable from the background aerogel. Twenty-two samples with an anthropogenic origin were rejected, including four secondary ejecta from impacts on the Stardust spacecraft aft solar panels, nine ejecta from secondary impacts on the Stardust Sample Return Capsule, and nine contaminants lacking evidence of an impact. Other samples in the collection included I1029,1,6, which contained surviving solar system impactor material. Four samples remained ambiguous: I1006,2,18, I1044,2,32, and I1092,2,38 were too dense for analysis, and we did not detect an intact projectile in I1044,3,33. We detected no radiation effects from the synchrotron soft X-ray analyses; however, we recorded the effects of synchrotron hard X-ray radiation on I1043,1,30 and I1047,1,34. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Butterworth, Anna L AU - Westphal, Andrew J AU - Tyliszczak, Tolek AU - Gainsforth, Zack AU - Stodolna, Julien AU - Frank, David R AU - Allen, Carlton AU - Anderson, David AU - Ansari, Asna AU - Bajt, Sasa AU - Bastien, Ron K AU - Bassim, Nabil AU - Bechtel, Hans A AU - Borg, Janet AU - Brenker, Frank E AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Burghammer, Manfred AU - Changela, Hitesh AU - Cloetens, Peter AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Flynn, George J AU - Gruen, Eberhard AU - Heck, Philipp R AU - Hillier, Jon K AU - Hoppe, Peter AU - Hudson, Bruce AU - Huth, Joachim AU - Hvide, Brit AU - Kearsley, Anton AU - King, Ashley J AU - Lai, Barry AU - Leitner, Jan AU - Lemelle, Laurence AU - Leroux, Hugues AU - Leonard, Ariel AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Postberg, Frank AU - Price, Mark C AU - Sandford, Scott A AU - Tresserras, Juan-Angel Sans AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Silversmit, Geert AU - Simionovici, Alexandre S AU - Sole, Vicente A AU - Srama, Ralf AU - Stadermann, Frank J AU - Stephan, Thomas AU - Sterken, Veerle J AU - Stroud, Rhonda M AU - Sutton, Steven AU - Trieloff, Mario AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Vekemans, Bart AU - Vincze, Laszlo AU - Von Korff, Joshua AU - Wordsworth, Naomi AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1562 EP - 1593 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - silicates KW - particle tracks KW - magnesium KW - magnesian silicates KW - impact features KW - characterization KW - scanning transmission X-ray microscopy KW - olivine group KW - silicon KW - iron KW - XANES spectra KW - quantitative analysis KW - Stardust Interstellar Preliminary Examination KW - aluminum KW - orthosilicates KW - oxides KW - spectra KW - interstellar dust KW - alkaline earth metals KW - Stardust Mission KW - amorphous materials KW - trajectories KW - spinel KW - ejecta KW - X-ray spectra KW - forsterite KW - nesosilicates KW - Stardust Interstellar Dust Collector KW - cosmic dust KW - metals KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696876720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stardust+Interstellar+Preliminary+Examination%3B+IV%2C+Scanning+transmission+X-ray+microscopy+analyses+of+impact+features+in+the+Stardust+Interstellar+Dust+Collector&rft.au=Butterworth%2C+Anna+L%3BWestphal%2C+Andrew+J%3BTyliszczak%2C+Tolek%3BGainsforth%2C+Zack%3BStodolna%2C+Julien%3BFrank%2C+David+R%3BAllen%2C+Carlton%3BAnderson%2C+David%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBastien%2C+Ron+K%3BBassim%2C+Nabil%3BBechtel%2C+Hans+A%3BBorg%2C+Janet%3BBrenker%2C+Frank+E%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BBurghammer%2C+Manfred%3BChangela%2C+Hitesh%3BCloetens%2C+Peter%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BFlynn%2C+George+J%3BGruen%2C+Eberhard%3BHeck%2C+Philipp+R%3BHillier%2C+Jon+K%3BHoppe%2C+Peter%3BHudson%2C+Bruce%3BHuth%2C+Joachim%3BHvide%2C+Brit%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLemelle%2C+Laurence%3BLeroux%2C+Hugues%3BLeonard%2C+Ariel%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPostberg%2C+Frank%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BTresserras%2C+Juan-Angel+Sans%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSilversmit%2C+Geert%3BSimionovici%2C+Alexandre+S%3BSole%2C+Vicente+A%3BSrama%2C+Ralf%3BStadermann%2C+Frank+J%3BStephan%2C+Thomas%3BSterken%2C+Veerle+J%3BStroud%2C+Rhonda+M%3BSutton%2C+Steven%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3BVon+Korff%2C+Joshua%3BWordsworth%2C+Naomi%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Butterworth&rft.aufirst=Anna&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1562&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12220 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 - 33 N1 - PubXState - AR N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-10-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - alkaline earth metals; aluminum; amorphous materials; characterization; cosmic dust; ejecta; forsterite; impact features; interstellar dust; iron; magnesian silicates; magnesium; metals; nesosilicates; olivine group; orthosilicates; oxides; particle tracks; quantitative analysis; scanning transmission X-ray microscopy; silicates; silicon; spectra; spinel; Stardust Interstellar Dust Collector; Stardust Interstellar Preliminary Examination; Stardust Mission; trajectories; X-ray spectra; XANES spectra DO - http://dx.doi.org/10.1111/maps.12220 ER - TY - JOUR T1 - Stardust Interstellar Preliminary Examination; VII, Synchrotron X-ray fluorescence analysis of six Stardust interstellar candidates measured with the Advanced Photon Source 2-ID-D microprobe AN - 1696876094; 2015-068965 AB - The NASA Stardust spacecraft exposed an aerogel collector to the interstellar dust passing through the solar system. We performed X-ray fluorescence element mapping and abundance measurements, for elements 19 < or = Z < or = 30, on six "interstellar candidates," potential interstellar impacts identified by Stardust[at]Home and extracted for analyses in picokeystones. One, I1044,3,33, showed no element hot-spots within the designated search area. However, we identified a nearby surface feature, consistent with the impact of a weak, high-speed particle having an approximately chondritic (CI) element abundance pattern, except for factor-of-ten enrichments in K and Zn and an S depletion. This hot-spot, containing approximately 10 fg of Fe, corresponds to an approximately 350 nm chondritic particle, small enough to be missed by Stardust[at]Home, indicating that other techniques may be necessary to identify all interstellar candidates. Only one interstellar candidate, I1004,1,2, showed a track. The terminal particle has large enrichments in S, Ti, Cr, Mn, Ni, Cu, and Zn relative to Fe-normalized CI values. It has high Al/Fe, but does not match the Ni/Fe range measured for samples of Al-deck material from the Stardust sample return capsule, which was within the field-of-view of the interstellar collector. A third interstellar candidate, I1075,1,25, showed an Al-rich surface feature that has a composition generally consistent with the Al-deck material, suggesting that it is a secondary particle. The other three interstellar candidates, I1001,1,16, I1001,2,17, and I1044,2,32, showed no impact features or tracks, but allowed assessment of submicron contamination in this aerogel, including Fe hot-spots having CI-like Ni/Fe ratios, complicating the search for CI-like interstellar/interplanetary dust. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Flynn, George J AU - Sutton, Steven R AU - Lai, Barry AU - Wirick, Sue AU - Allen, Carlton AU - Anderson, David AU - Ansari, Asna AU - Bajt, Sasa AU - Bastien, Ron K AU - Bassim, Nabil AU - Bechtel, Hans A AU - Borg, Janet AU - Brenker, Frank E AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Burghammer, Manfred AU - Butterworth, Anna L AU - Changela, Hitesh AU - Cloetens, Peter AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Frank, David R AU - Gainsforth, Zack AU - Gruen, Eberhard AU - Heck, Philipp R AU - Hillier, Jon K AU - Hoppe, Peter AU - Hudson, Bruce AU - Huth, Joachim AU - Hvide, Brit AU - Kearsley, Anton AU - King, Ashley J AU - Leitner, Jan AU - Lemelle, Laurence AU - Leroux, Hugues AU - Leonard, Ariel AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Postberg, Frank AU - Price, Mark C AU - Sandford, Scott A AU - Tresserras, Juan-Angel Sans AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Silversmit, Geert AU - Simionovici, Alexandre S AU - Sole, Vicente A AU - Srama, Ralf AU - Stadermann, Frank J AU - Stephan, Thomas AU - Sterken, Veerle J AU - Stodolna, Julien AU - Stroud, Rhonda M AU - Trieloff, Mario AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Tyliszczak, Tolek AU - Vekemans, Bart AU - Vincze, Laszlo AU - Von Korff, Joshua AU - Westphal, Andrew J AU - Wordsworth, Naomi AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1626 EP - 1644 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - zinc KW - particle tracks KW - ion probe data KW - Stardust Mission KW - detection limit KW - enrichment KW - alkali metals KW - mass spectra KW - picokeystones KW - impacts KW - iron KW - synchrotron radiation KW - cosmic dust KW - Stardust Interstellar Preliminary Examination KW - metals KW - potassium KW - X-ray fluorescence spectra KW - sulfur KW - aerogel KW - spectra KW - chemical composition KW - interstellar dust KW - depletion KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696876094?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stardust+Interstellar+Preliminary+Examination%3B+VII%2C+Synchrotron+X-ray+fluorescence+analysis+of+six+Stardust+interstellar+candidates+measured+with+the+Advanced+Photon+Source+2-ID-D+microprobe&rft.au=Flynn%2C+George+J%3BSutton%2C+Steven+R%3BLai%2C+Barry%3BWirick%2C+Sue%3BAllen%2C+Carlton%3BAnderson%2C+David%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBastien%2C+Ron+K%3BBassim%2C+Nabil%3BBechtel%2C+Hans+A%3BBorg%2C+Janet%3BBrenker%2C+Frank+E%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BBurghammer%2C+Manfred%3BButterworth%2C+Anna+L%3BChangela%2C+Hitesh%3BCloetens%2C+Peter%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BFrank%2C+David+R%3BGainsforth%2C+Zack%3BGruen%2C+Eberhard%3BHeck%2C+Philipp+R%3BHillier%2C+Jon+K%3BHoppe%2C+Peter%3BHudson%2C+Bruce%3BHuth%2C+Joachim%3BHvide%2C+Brit%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLeitner%2C+Jan%3BLemelle%2C+Laurence%3BLeroux%2C+Hugues%3BLeonard%2C+Ariel%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPostberg%2C+Frank%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BTresserras%2C+Juan-Angel+Sans%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSilversmit%2C+Geert%3BSimionovici%2C+Alexandre+S%3BSole%2C+Vicente+A%3BSrama%2C+Ralf%3BStadermann%2C+Frank+J%3BStephan%2C+Thomas%3BSterken%2C+Veerle+J%3BStodolna%2C+Julien%3BStroud%2C+Rhonda+M%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BTyliszczak%2C+Tolek%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3BVon+Korff%2C+Joshua%3BWestphal%2C+Andrew+J%3BWordsworth%2C+Naomi%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Flynn&rft.aufirst=George&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1626&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12144 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 - 21 N1 - PubXState - AR N1 - Document feature - illus. N1 - Last updated - 2015-10-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aerogel; alkali metals; chemical composition; cosmic dust; depletion; detection limit; enrichment; impacts; interstellar dust; ion probe data; iron; mass spectra; metals; particle tracks; picokeystones; potassium; spectra; Stardust Interstellar Preliminary Examination; Stardust Mission; sulfur; synchrotron radiation; X-ray fluorescence spectra; zinc DO - http://dx.doi.org/10.1111/maps.12144 ER - TY - JOUR T1 - Stardust Interstellar Preliminary Examination, XI, Identification and elemental analysis of impact craters on Al foils from the Stardust interstellar dust collector AN - 1696876008; 2015-068969 AB - The Stardust Interstellar Preliminary Examination team analyzed thirteen Al foils from the NASA Stardust interstellar collector tray in order to locate candidate interstellar dust (ISD) grain impacts. Scanning electron microscope (SEM) images reveal that the foils possess abundant impact crater and crater-like features. Elemental analyses of the crater features, with Auger electron spectroscopy, SEM-based energy dispersive X-ray (EDX) spectroscopy, and scanning transmission electron microscope-based EDX spectroscopy, demonstrate that the majority are either the result of impacting debris fragments from the spacecraft solar panels, or intrinsic defects in the foil. The elemental analyses also reveal that four craters contain residues of a definite extraterrestrial origin, either as interplanetary dust particles or ISD particles. These four craters are designated level 2 interstellar candidates, based on the crater shapes indicative of hypervelocity impacts and the residue compositions inconsistent with spacecraft debris. Abstract Copyright Published 2014. This article is a U.S. Government work and is in the public domain in the USA. JF - Meteoritics & Planetary Science AU - Stroud, Rhonda M AU - Allen, Carlton AU - Ansari, Asna AU - Anderson, David AU - Bajt, Sasa AU - Bassim, Nabil AU - Bastien, Ron S AU - Bechtel, Hans A AU - Borg, Janet AU - Brenker, Frank E AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Burghammer, Manfred AU - Butterworth, Anna L AU - Changela, Hitesh AU - Cloetens, Peter AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Flynn, George J AU - Frank, David R AU - Gainsforth, Zack AU - Gruen, Eberhard AU - Heck, Philipp R AU - Hillier, Jon K AU - Hoppe, Peter AU - Huth, Joachim AU - Hvide, Brit AU - Kearsley, Anton AU - King, Ashley J AU - Kotula, Paul AU - Lai, Barry AU - Leitner, Jan AU - Lemelle, Laurence AU - Leroux, Hugues AU - Leonard, Ariel AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Postberg, Frank AU - Price, Mark C AU - Sandford, Scott A AU - Tresserras, Juan-Angel Sans AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Schreiber, Kate AU - Silversmit, Geert AU - Simionovici, Alexandre S AU - Sole, Vicente A AU - Srama, Ralf AU - Stephan, Thomas AU - Sterken, Veerle J AU - Stodolna, Julien AU - Sutton, Steven AU - Trieloff, Mario AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Tyliszczak, Tolek AU - Vekemans, Bart AU - Vincze, Laszlo AU - Westphal, Andrew J AU - Von Korff, Joshua AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1698 EP - 1719 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - aluminum foils KW - impact features KW - Stardust Mission KW - electron microscopy data KW - impacts KW - X-ray spectra KW - EDS spectra KW - cosmic dust KW - hypervelocity impacts KW - Stardust Interstellar Preliminary Examination KW - identification KW - impact craters KW - spectra KW - chemical composition KW - interstellar dust KW - SEM data KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696876008?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stardust+Interstellar+Preliminary+Examination%2C+XI%2C+Identification+and+elemental+analysis+of+impact+craters+on+Al+foils+from+the+Stardust+interstellar+dust+collector&rft.au=Stroud%2C+Rhonda+M%3BAllen%2C+Carlton%3BAnsari%2C+Asna%3BAnderson%2C+David%3BBajt%2C+Sasa%3BBassim%2C+Nabil%3BBastien%2C+Ron+S%3BBechtel%2C+Hans+A%3BBorg%2C+Janet%3BBrenker%2C+Frank+E%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BBurghammer%2C+Manfred%3BButterworth%2C+Anna+L%3BChangela%2C+Hitesh%3BCloetens%2C+Peter%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BFlynn%2C+George+J%3BFrank%2C+David+R%3BGainsforth%2C+Zack%3BGruen%2C+Eberhard%3BHeck%2C+Philipp+R%3BHillier%2C+Jon+K%3BHoppe%2C+Peter%3BHuth%2C+Joachim%3BHvide%2C+Brit%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BKotula%2C+Paul%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLemelle%2C+Laurence%3BLeroux%2C+Hugues%3BLeonard%2C+Ariel%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPostberg%2C+Frank%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BTresserras%2C+Juan-Angel+Sans%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSchreiber%2C+Kate%3BSilversmit%2C+Geert%3BSimionovici%2C+Alexandre+S%3BSole%2C+Vicente+A%3BSrama%2C+Ralf%3BStephan%2C+Thomas%3BSterken%2C+Veerle+J%3BStodolna%2C+Julien%3BSutton%2C+Steven%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BTyliszczak%2C+Tolek%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3BWestphal%2C+Andrew+J%3BVon+Korff%2C+Joshua%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Stroud&rft.aufirst=Rhonda&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1698&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12136 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 - 39 N1 - PubXState - AR N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-10-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aluminum foils; chemical composition; cosmic dust; EDS spectra; electron microscopy data; hypervelocity impacts; identification; impact craters; impact features; impacts; interstellar dust; SEM data; spectra; Stardust Interstellar Preliminary Examination; Stardust Mission; X-ray spectra DO - http://dx.doi.org/10.1111/maps.12136 ER - TY - JOUR T1 - Stardust Interstellar Preliminary Examination; III, Infrared spectroscopic analysis of interstellar dust candidates AN - 1696875753; 2015-068961 AB - Under the auspices of the Stardust Interstellar Preliminary Examination, picokeystones extracted from the Stardust Interstellar Dust Collector were examined with synchrotron Fourier transform infrared (FTIR) microscopy to establish whether they contained extraterrestrial organic material. The picokeystones were found to be contaminated with varying concentrations and speciation of organics in the native aerogel, which hindered the search for organics in the interstellar dust candidates. Furthermore, examination of the picokeystones prior to and post X-ray microprobe analyses yielded evidence of beam damage in the form of organic deposition or modification, particularly with hard X-ray synchrotron X-ray fluorescence. From these results, it is clear that considerable care must be taken to interpret any organics that might be in interstellar dust particles. For the interstellar candidates examined thus far, however, there is no clear evidence of extraterrestrial organics associated with the track and/or terminal particles. However, we detected organic matter associated with the terminal particle in Track 37, likely a secondary impact from the Al-deck of the sample return capsule, demonstrating the ability of synchrotron FTIR to detect organic matter in small particles within picokeystones from the Stardust interstellar dust collector. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Bechtel, Hans A AU - Flynn, George J AU - Allen, Carlton AU - Anderson, David AU - Ansari, Asna AU - Bajt, Sasa AU - Bastien, Ron K AU - Bassim, Nabil AU - Borg, Janet AU - Brenker, Frank E AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Burghammer, Manfred AU - Butterworth, Anna L AU - Changela, Hitesh AU - Cloetens, Peter AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Frank, David R AU - Gainsforth, Zack AU - Gruen, Eberhard AU - Heck, Philipp R AU - Hillier, Jon K AU - Hoppe, Peter AU - Hudson, Bruce AU - Huth, Joachim AU - Hvide, Brit AU - Kearsley, Anton AU - King, Ashley J AU - Lai, Barry AU - Leitner, Jan AU - Lemelle, Laurence AU - Leroux, Hugues AU - Leonard, Ariel AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Postberg, Frank AU - Price, Mark C AU - Sandford, Scott A AU - Tresserras, Juan-Angel Sans AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Silversmit, Geert AU - Simionovici, Alexandre S AU - Sole, Vicente A AU - Srama, Ralf AU - Stadermann, Frank J AU - Stephan, Thomas AU - Sterken, Veerle J AU - Stodolna, Julien AU - Stroud, Rhonda M AU - Sutton, Steven AU - Trieloff, Mario AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Tyliszczak, Tolek AU - Vekemans, Bart AU - Vincze, Laszlo AU - Von Korff, Joshua AU - Westphal, Andrew J AU - Wordsworth, Naomi AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1548 EP - 1561 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - methods KW - particle tracks KW - Stardust Mission KW - aliphatic hydrocarbons KW - picokeystones KW - infrared spectra KW - synchrotron radiation KW - FTIR spectra KW - organic compounds KW - cosmic dust KW - detection KW - Stardust Interstellar Preliminary Examination KW - carbon KW - hydrocarbons KW - aerogel KW - spectra KW - organic carbon KW - interstellar dust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875753?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stardust+Interstellar+Preliminary+Examination%3B+III%2C+Infrared+spectroscopic+analysis+of+interstellar+dust+candidates&rft.au=Bechtel%2C+Hans+A%3BFlynn%2C+George+J%3BAllen%2C+Carlton%3BAnderson%2C+David%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBastien%2C+Ron+K%3BBassim%2C+Nabil%3BBorg%2C+Janet%3BBrenker%2C+Frank+E%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BBurghammer%2C+Manfred%3BButterworth%2C+Anna+L%3BChangela%2C+Hitesh%3BCloetens%2C+Peter%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BFrank%2C+David+R%3BGainsforth%2C+Zack%3BGruen%2C+Eberhard%3BHeck%2C+Philipp+R%3BHillier%2C+Jon+K%3BHoppe%2C+Peter%3BHudson%2C+Bruce%3BHuth%2C+Joachim%3BHvide%2C+Brit%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLemelle%2C+Laurence%3BLeroux%2C+Hugues%3BLeonard%2C+Ariel%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPostberg%2C+Frank%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BTresserras%2C+Juan-Angel+Sans%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSilversmit%2C+Geert%3BSimionovici%2C+Alexandre+S%3BSole%2C+Vicente+A%3BSrama%2C+Ralf%3BStadermann%2C+Frank+J%3BStephan%2C+Thomas%3BSterken%2C+Veerle+J%3BStodolna%2C+Julien%3BStroud%2C+Rhonda+M%3BSutton%2C+Steven%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BTyliszczak%2C+Tolek%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3BVon+Korff%2C+Joshua%3BWestphal%2C+Andrew+J%3BWordsworth%2C+Naomi%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Bechtel&rft.aufirst=Hans&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1548&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12125 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 - 30 N1 - PubXState - AR N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-10-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aerogel; aliphatic hydrocarbons; carbon; cosmic dust; detection; FTIR spectra; hydrocarbons; infrared spectra; interstellar dust; methods; organic carbon; organic compounds; particle tracks; picokeystones; spectra; Stardust Interstellar Preliminary Examination; Stardust Mission; synchrotron radiation DO - http://dx.doi.org/10.1111/maps.12125 ER - TY - JOUR T1 - Stardust Interstellar Preliminary Examination; VIII, Identification of crystalline material in two interstellar candidates AN - 1696875666; 2015-068966 AB - Using synchrotron-based X-ray diffraction measurements, we identified crystalline material in two particles of extraterrestrial origin extracted from the Stardust Interstellar Dust Collector. The first particle, I1047,1,34 (Hylabrook), consisted of a mosaiced olivine grain approximately 1 mu m in size with internal strain fields up to 0.3%. The unit cell dimensions were a = 4.85 + or - 0.08 Aa, b = 10.34 + or - 0.16 Aa, c = 6.08 + or - 0.13 Aa (2sigma ). The second particle, I1043,1,30 (Orion), contained an olivine grain nearly equal 2 mu m in length and >500 nm in width. It was polycrystalline with both mosaiced domains varying over nearly equal 20 degrees and additional unoriented domains, and contained internal strain fields Fo (sub 65) (2sigma ). Orion also contained abundant spinel nanocrystals of unknown composition, but unit cell dimension a = 8.06 + or - 0.08 Aa (2sigma ). Two additional crystalline phases were present and remained unidentified. An amorphous component appeared to be present in both these particles based on STXM and XRF results reported elsewhere. Abstract Copyright Published 2014. This article is a U.S. Government work and is in the public domain in the USA. JF - Meteoritics & Planetary Science AU - Gainsforth, Zack AU - Brenker, Frank E AU - Simionovici, Alexandre S AU - Schmitz, Sylvia AU - Burghammer, Manfred AU - Butterworth, Anna L AU - Cloetens, Peter AU - Lemelle, Laurence AU - Tresserras, Juan-Angel Sans AU - Schoonjans, Tom AU - Silversmit, Geert AU - Sole, Vicente A AU - Vekemans, Bart AU - Vincze, Laszlo AU - Westphal, Andrew J AU - Allen, Carlton AU - Anderson, David AU - Ansari, Asna AU - Bajt, Sasa AU - Bastien, Ron K AU - Bassim, Nabil AU - Bechtel, Hans A AU - Borg, Janet AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Changela, Hitesh AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Flynn, George AU - Fougeray, Patrick AU - Frank, David R AU - Gruen, Eberhard AU - Heck, Philipp R AU - Hillier, Jon K AU - Hoppe, Peter AU - Hudson, Bruce AU - Huth, Joachim AU - Hvide, Brit AU - Kearsley, Anton AU - King, Ashley J AU - Lai, Barry AU - Leitner, Jan AU - Leroux, Hugues AU - Leonard, Ariel AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Postberg, Frank AU - Price, Mark C AU - Sandford, Scott A AU - Srama, Ralf AU - Stephan, Thomas AU - Sterken, Veerle J AU - Stodolna, Julien AU - Stroud, Rhonda M AU - Sutton, Steven AU - Trieloff, Mario AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Tyliszczak, Tolek AU - Von Korff, Joshua AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1645 EP - 1665 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - silicates KW - cell dimensions KW - X-ray diffraction data KW - strain KW - Stardust Mission KW - microstructure KW - unit cell KW - spinel KW - olivine group KW - powder method KW - crystallinity KW - synchrotron radiation KW - nesosilicates KW - cosmic dust KW - Stardust Interstellar Preliminary Examination KW - olivine KW - orthosilicates KW - oxides KW - interstellar dust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875666?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stardust+Interstellar+Preliminary+Examination%3B+VIII%2C+Identification+of+crystalline+material+in+two+interstellar+candidates&rft.au=Gainsforth%2C+Zack%3BBrenker%2C+Frank+E%3BSimionovici%2C+Alexandre+S%3BSchmitz%2C+Sylvia%3BBurghammer%2C+Manfred%3BButterworth%2C+Anna+L%3BCloetens%2C+Peter%3BLemelle%2C+Laurence%3BTresserras%2C+Juan-Angel+Sans%3BSchoonjans%2C+Tom%3BSilversmit%2C+Geert%3BSole%2C+Vicente+A%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3BWestphal%2C+Andrew+J%3BAllen%2C+Carlton%3BAnderson%2C+David%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBastien%2C+Ron+K%3BBassim%2C+Nabil%3BBechtel%2C+Hans+A%3BBorg%2C+Janet%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BChangela%2C+Hitesh%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BFlynn%2C+George%3BFougeray%2C+Patrick%3BFrank%2C+David+R%3BGruen%2C+Eberhard%3BHeck%2C+Philipp+R%3BHillier%2C+Jon+K%3BHoppe%2C+Peter%3BHudson%2C+Bruce%3BHuth%2C+Joachim%3BHvide%2C+Brit%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLeroux%2C+Hugues%3BLeonard%2C+Ariel%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPostberg%2C+Frank%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BSrama%2C+Ralf%3BStephan%2C+Thomas%3BSterken%2C+Veerle+J%3BStodolna%2C+Julien%3BStroud%2C+Rhonda+M%3BSutton%2C+Steven%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BTyliszczak%2C+Tolek%3BVon+Korff%2C+Joshua%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Gainsforth&rft.aufirst=Zack&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1645&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12148 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 - 55 N1 - PubXState - AR N1 - Document feature - illus. incl. 7 tables N1 - Last updated - 2015-10-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - cell dimensions; cosmic dust; crystallinity; interstellar dust; microstructure; nesosilicates; olivine; olivine group; orthosilicates; oxides; powder method; silicates; spinel; Stardust Interstellar Preliminary Examination; Stardust Mission; strain; synchrotron radiation; unit cell; X-ray diffraction data DO - http://dx.doi.org/10.1111/maps.12148 ER - TY - JOUR T1 - Stardust Interstellar Preliminary Examination; IX, high-speed interstellar dust analog capture in Stardust flight-spare aerogel AN - 1696875570; 2015-068967 AB - The NASA Stardust mission used silica aerogel slabs to slowly decelerate and capture impinging cosmic dust particles for return to Earth. During this process, impact tracks are generated along the trajectory of the particle into the aerogel. It is believed that the morphology and dimensions of these tracks, together with the state of captured grains at track termini, may be linked to the size, velocity, and density of the impacting cosmic dust grain. Here, we present the results of laboratory hypervelocity impact experiments, during which cosmic dust analog particles (diameters of between 0.2 and 0.4 mu m), composed of olivine, orthopyroxene, or an organic polymer, were accelerated onto Stardust flight-spare low-density (approximately 0.01 g cm (super -3) ) silica aerogel. The impact velocities (3-21 km s (super -1) ) were chosen to simulate the range of velocities expected during Stardust's interstellar dust (ISD) collection phases. Track lengths and widths, together with the success of particle capture, are analyzed as functions of impact velocity and particle composition, density, and size. Captured terminal particles from low-density organic projectiles become undetectable at lower velocities than those from similarly sized, denser mineral particles, which are still detectable (although substantially altered by the impact process) at 15 km s (super -1) . The survival of these terminal particles, together with the track dimensions obtained during low impact speed capture of small grains in the laboratory, indicates that two of the three best Stardust candidate extraterrestrial grains were actually captured at speeds much lower than predicted. Track length and diameters are, in general, more sensitive to impact velocities than previously expected, which makes tracks of particles with diameters of 0.4 mu m and below hard to identify at low capture speeds (<10 km s (super -1) ). Therefore, although captured intact, the majority of the interstellar dust grains returned to Earth by Stardust remain to be found. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Postberg, Frank AU - Hillier, John K AU - Armes, S P AU - Bugiel, S AU - Butterworth, Anna L AU - Dupin, D AU - Fielding, L A AU - Fujii, S AU - Gainsforth, Zack AU - Gruen, Eberhard AU - Li, Y W AU - Srama, Ralf AU - Sterken, Veerle J AU - Stodolna, Julien AU - Trieloff, Mario AU - Westphal, Andrew J AU - Achilles, C AU - Allen, Carlton AU - Ansari, Asna AU - Bajt, Sasa AU - Bassim, Nabil AU - Bastien, Ron K AU - Bechtel, Hans A AU - Borg, Janet AU - Brenker, Frank E AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Burghammer, Manfred AU - Changela, Hitesh AU - Cloetens, Peter AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Flynn, George J AU - Frank, David R AU - Heck, Philipp R AU - Hoppe, Peter AU - Huss, G AU - Huth, Joachim AU - Kearsley, Anton AU - King, Ashley J AU - Lai, Barry AU - Leitner, Jan AU - Lemelle, Laurence AU - Leonard, Ariel AU - Leroux, Hugues AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Price, Mark C AU - Sandford, Scott A AU - Tresserras, Juan-Angel Sans AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Schreiber, Kate AU - Silversmit, Geert AU - Simionovici, Alexandre S AU - Sole, Vicente A AU - Stadermann, Frank J AU - Stephan, Thomas AU - Stroud, Rhonda AU - Sutton, Steven AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Tyliszczak, Tolek AU - Vekemans, Bart AU - Vincze, Laszlo AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1666 EP - 1679 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - silicates KW - particle tracks KW - density KW - acceleration KW - olivine group KW - laboratory studies KW - pyroxene group KW - hypervelocity impacts KW - Stardust Interstellar Preliminary Examination KW - olivine KW - orthosilicates KW - velocity KW - polymers KW - interstellar dust KW - chain silicates KW - experimental studies KW - Stardust Mission KW - trajectories KW - impacts KW - size KW - nesosilicates KW - cosmic dust KW - natural analogs KW - aerogel KW - orthopyroxene KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875570?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stardust+Interstellar+Preliminary+Examination%3B+IX%2C+high-speed+interstellar+dust+analog+capture+in+Stardust+flight-spare+aerogel&rft.au=Postberg%2C+Frank%3BHillier%2C+John+K%3BArmes%2C+S+P%3BBugiel%2C+S%3BButterworth%2C+Anna+L%3BDupin%2C+D%3BFielding%2C+L+A%3BFujii%2C+S%3BGainsforth%2C+Zack%3BGruen%2C+Eberhard%3BLi%2C+Y+W%3BSrama%2C+Ralf%3BSterken%2C+Veerle+J%3BStodolna%2C+Julien%3BTrieloff%2C+Mario%3BWestphal%2C+Andrew+J%3BAchilles%2C+C%3BAllen%2C+Carlton%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBassim%2C+Nabil%3BBastien%2C+Ron+K%3BBechtel%2C+Hans+A%3BBorg%2C+Janet%3BBrenker%2C+Frank+E%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BBurghammer%2C+Manfred%3BChangela%2C+Hitesh%3BCloetens%2C+Peter%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BFlynn%2C+George+J%3BFrank%2C+David+R%3BHeck%2C+Philipp+R%3BHoppe%2C+Peter%3BHuss%2C+G%3BHuth%2C+Joachim%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLemelle%2C+Laurence%3BLeonard%2C+Ariel%3BLeroux%2C+Hugues%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BTresserras%2C+Juan-Angel+Sans%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSchreiber%2C+Kate%3BSilversmit%2C+Geert%3BSimionovici%2C+Alexandre+S%3BSole%2C+Vicente+A%3BStadermann%2C+Frank+J%3BStephan%2C+Thomas%3BStroud%2C+Rhonda%3BSutton%2C+Steven%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BTyliszczak%2C+Tolek%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Postberg&rft.aufirst=Frank&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1666&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12173 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 - 28 N1 - PubXState - AR N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2015-11-19 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - acceleration; aerogel; chain silicates; cosmic dust; density; experimental studies; hypervelocity impacts; impacts; interstellar dust; laboratory studies; natural analogs; nesosilicates; olivine; olivine group; orthopyroxene; orthosilicates; particle tracks; polymers; pyroxene group; silicates; size; Stardust Interstellar Preliminary Examination; Stardust Mission; trajectories; velocity DO - http://dx.doi.org/10.1111/maps.12173 ER - TY - JOUR T1 - Stardust Interstellar Preliminary Examination; X, Impact speeds and directions of interstellar grains on the Stardust dust collector AN - 1696875169; 2015-068968 AB - On the basis of an interstellar dust model compatible with Ulysses and Galileo observations, we calculate and predict the trajectories of interstellar dust (ISD) in the solar system and the distribution of the impact speeds, directions, and flux of ISD particles on the Stardust Interstellar Dust Collector during the two collection periods of the mission. We find that the expected impact velocities are generally low ( 1, and that some of the particles will impact on the cometary side of the collector. If we assume astronomical silicates for particle material and a density of 2 g cm (super -3) , and use the Ulysses measurements and the ISD trajectory simulations, we conclude that the total number of (detectable) captured ISD particles may be on the order of 50. In companion papers in this volume, we report the discovery of three interstellar dust candidates in the Stardust aerogel tiles. The impact directions and speeds of these candidates are consistent with those calculated from our ISD propagation model, within the uncertainties of the model and of the observations. Abstract Copyright The Meteoritical Society, 2014. JF - Meteoritics & Planetary Science AU - Sterken, Veerle J AU - Westphal, Andrew J AU - Altobelli, Nicolas AU - Gruen, Eberhard AU - Hillier, Jon K AU - Postberg, Frank AU - Srama, Ralf AU - Allen, Carlton AU - Anderson, David AU - Ansari, Asna AU - Bajt, Sasa AU - Bastien, Ron S AU - Bassim, Nabil AU - Bechtel, Hans A AU - Borg, Janet AU - Brenker, Frank E AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Burghammer, Manfred AU - Butterworth, Anna L AU - Changela, Hitesh AU - Cloetens, Peter AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Flynn, George J AU - Frank, David R AU - Gainsforth, Zack AU - Heck, Philipp R AU - Hoppe, Peter AU - Hudson, Bruce AU - Huth, Joachim AU - Hvide, Brit AU - Kearsley, Anton AU - King, Ashley J AU - Lai, Barry AU - Leitner, Jan AU - Lemelle, Laurence AU - Leroux, Hugues AU - Leonard, Ariel AU - Lettieri, Robert AU - Marchant, William AU - Nittler, Larry R AU - Ogliore, Ryan AU - Ong, Wei Ja AU - Price, Mark C AU - Sandford, Scott A AU - Tresserras, Juan-Angel Sans AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Silversmit, Geert AU - Simionovici, Alexandre S AU - Sole, Vicente A AU - Stephan, Thomas AU - Stodolna, Julien AU - Stroud, Rhonda M AU - Sutton, Steven AU - Trieloff, Mario AU - Tsou, Peter AU - Tsuchiyama, Akira AU - Tyliszczak, Tolek AU - Vekemans, Bart AU - Vincze, Laszlo AU - Von Korff, Joshua AU - Wordsworth, Naomi AU - Zevin, Daniel AU - Zolensky, Michael E AU - Anonymous Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1680 EP - 1697 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 9 SN - 1086-9379, 1086-9379 KW - solar system KW - density KW - Stardust Mission KW - orbits KW - trajectories KW - Lorentz force KW - impacts KW - simulation KW - models KW - cosmic dust KW - dynamics KW - Stardust Interstellar Preliminary Examination KW - solar radiation KW - velocity KW - aerogel KW - interstellar dust KW - uncertainty KW - particles KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875169?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Stardust+Interstellar+Preliminary+Examination%3B+X%2C+Impact+speeds+and+directions+of+interstellar+grains+on+the+Stardust+dust+collector&rft.au=Sterken%2C+Veerle+J%3BWestphal%2C+Andrew+J%3BAltobelli%2C+Nicolas%3BGruen%2C+Eberhard%3BHillier%2C+Jon+K%3BPostberg%2C+Frank%3BSrama%2C+Ralf%3BAllen%2C+Carlton%3BAnderson%2C+David%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBastien%2C+Ron+S%3BBassim%2C+Nabil%3BBechtel%2C+Hans+A%3BBorg%2C+Janet%3BBrenker%2C+Frank+E%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BBurghammer%2C+Manfred%3BButterworth%2C+Anna+L%3BChangela%2C+Hitesh%3BCloetens%2C+Peter%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BFlynn%2C+George+J%3BFrank%2C+David+R%3BGainsforth%2C+Zack%3BHeck%2C+Philipp+R%3BHoppe%2C+Peter%3BHudson%2C+Bruce%3BHuth%2C+Joachim%3BHvide%2C+Brit%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLemelle%2C+Laurence%3BLeroux%2C+Hugues%3BLeonard%2C+Ariel%3BLettieri%2C+Robert%3BMarchant%2C+William%3BNittler%2C+Larry+R%3BOgliore%2C+Ryan%3BOng%2C+Wei+Ja%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BTresserras%2C+Juan-Angel+Sans%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSilversmit%2C+Geert%3BSimionovici%2C+Alexandre+S%3BSole%2C+Vicente+A%3BStephan%2C+Thomas%3BStodolna%2C+Julien%3BStroud%2C+Rhonda+M%3BSutton%2C+Steven%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTsuchiyama%2C+Akira%3BTyliszczak%2C+Tolek%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3BVon+Korff%2C+Joshua%3BWordsworth%2C+Naomi%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E%3BAnonymous&rft.aulast=Sterken&rft.aufirst=Veerle&rft.date=2014-09-01&rft.volume=49&rft.issue=9&rft.spage=1680&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12219 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 - 38 N1 - PubXState - AR N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-10-15 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - aerogel; cosmic dust; density; dynamics; impacts; interstellar dust; Lorentz force; models; orbits; particles; simulation; solar radiation; solar system; Stardust Interstellar Preliminary Examination; Stardust Mission; trajectories; uncertainty; velocity DO - http://dx.doi.org/10.1111/maps.12219 ER - TY - JOUR T1 - The quest for regolithic howardites; Part 2, Surface origins highlighted by noble gases AN - 1664436100; 2015-023286 AB - We report noble gas data of helium (He), neon (Ne), argon (Ar), krypton (Kr) and xenon (Xe), cosmic ray exposure (CRE) ages and nominal gas retention (K-Ar, U-Th-He) ages for seven howardites (CRE 01400, EET 87513, EET 87518, EET 99400, GRO 95535, GRO 95602, SAN 03472), in continuing research to identify regolithic samples, and better understand the vestan regolith. In our previous work, we found little correlation between suggested regolith parameters of Ni > 300 mu g/g, Al (sub 2) O (sub 3) 8-9 wt% and eucrite/diogenite (E:D) ratio of 2:1 (Warren et al., 2009), and trapped solar wind (SW), fractionated solar wind (FSW) or planetary noble gas components (from impacted material) - noble gas indicators of a regolithic origin. Here, we have expanded our data set to include samples outside of these parameters to further explore composition, and the differences in Ni content as indicators for the presence of non-Vesta material. In addition, our sample set includes two potentially paired meteorites from the GRO suite. Finally, in our petrographic studies, the samples selected showed no evidence for carbonaceous chondrite fragments, which should reduce the effect of "contamination" by planetary noble gas components, and will allow us to better identify SW/FSW components, where present. Of the samples studied here, three howardites GRO 95535, GRO 95602 and EET 87513 show evidence for a regolithic origin, with both isotopic and element noble gas ratios clearly pointing to the presence of trapped components similar to SW/FSW or planetary. The two GRO howardites, GRO 95535 and GRO 95602, show similar noble gas ratios to our previously defined SW/FSW dominated regolithic group (LEW 85313 and MET 00423), suggesting a surface origin for these samples. However, interestingly, the GRO samples show vastly different cosmogenic noble gas abundances, and thus different CRE ages, which suggests that they are not paired. For howardite EET 87513, the data hint to the presence of CM-material, with a neon release pattern similar to our defined planetary/FSW dominated regolithic group (CM-rich samples PRA 04401, SCO 06040). Our petrological investigations found no evidence for CM fragments within EET 87513, though a single clast was reported previously (Buchanan et al., 1993). Aside from the Ne release pattern, the remaining noble gas data show more similarity with SW/FSW components. The remaining four howardites CRE 01400, EET 87518, EET 99400, and SAN 03472 and are dominated by cosmogenic noble gases, and show no evidence for a regolithic origin. Our data suggest that a CM-composition is likely present in all samples to some degree, but that this can be overprinted by SW components or cosmogenic components obtained in situ on the vestan surface or during transit to Earth respectively. The presence of CM material is an important parameter for understanding the evolution of Vesta's surface. While we have uncovered three further regolithic howardites ( approximately 13 regolithic total, of approximately 41 analysed), further noble gas analysis of HED meteorites is needed to not only determine regolithic origins, but to better characterise the abundance of carbonaceous chondrite material and its effect on the noble gas signatures of such samples. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Cartwright, J A AU - Ott, U AU - Mittlefehldt, D W Y1 - 2014/09/01/ PY - 2014 DA - 2014 Sep 01 SP - 488 EP - 508 PB - Elsevier, New York, NY VL - 140 SN - 0016-7037, 0016-7037 KW - stony meteorites KW - isotopes KW - Elephant Moraine Meteorites KW - exposure age KW - (U-Th)/He KW - meteorites KW - radioactive isotopes KW - iron meteorites KW - howardite KW - dates KW - noble gases KW - neon KW - absolute age KW - helium KW - cosmic rays KW - Archean KW - chemical composition KW - EET 87513 KW - Precambrian KW - cosmochemistry KW - xenon KW - krypton KW - GRO 95535 KW - achondrites KW - Santa Clara Meteorite KW - argon KW - Antarctica KW - K/Ar KW - SAN 03472 KW - regolith KW - Grosvenor Mountains Meteorites KW - 05B:Petrology of meteorites and tektites KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664436100?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=The+quest+for+regolithic+howardites%3B+Part+2%2C+Surface+origins+highlighted+by+noble+gases&rft.au=Cartwright%2C+J+A%3BOtt%2C+U%3BMittlefehldt%2C+D+W&rft.aulast=Cartwright&rft.aufirst=J&rft.date=2014-09-01&rft.volume=140&rft.issue=&rft.spage=488&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.05.033 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 - 118 N1 - PubXState - NY N1 - Document feature - illus. incl. 5 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-04-16 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - (U-Th)/He; absolute age; achondrites; Antarctica; Archean; argon; chemical composition; cosmic rays; cosmochemistry; dates; EET 87513; Elephant Moraine Meteorites; exposure age; GRO 95535; Grosvenor Mountains Meteorites; helium; howardite; iron meteorites; isotopes; K/Ar; krypton; meteorites; neon; noble gases; Precambrian; radioactive isotopes; regolith; SAN 03472; Santa Clara Meteorite; stony meteorites; xenon DO - http://dx.doi.org/10.1016/j.gca.2014.05.033 ER - TY - JOUR T1 - Accuracy assessment of global barotropic ocean tide models AN - 1664434613; 2015-023638 AB - The accuracy of state-of-the-art global barotropic tide models is assessed using bottom pressure data, coastal tide gauges, satellite altimetry, various geodetic data on Antarctic ice shelves, and independent tracked satellite orbit perturbations. Tide models under review include empirical, purely hydrodynamic ("forward"), and assimilative dynamical, i.e., constrained by observations. Ten dominant tidal constituents in the diurnal, semidiurnal, and quarter-diurnal bands are considered. Since the last major model comparison project in 1997, models have improved markedly, especially in shallow-water regions and also in the deep ocean. The root-sum-square differences between tide observations and the best models for eight major constituents are approximately 0.9, 5.0, and 6.5 cm for pelagic, shelf, and coastal conditions, respectively. Large intermodel discrepancies occur in high latitudes, but testing in those regions is impeded by the paucity of high-quality in situ tide records. Long-wavelength components of models tested by analyzing satellite laser ranging measurements suggest that several models are comparably accurate for use in precise orbit determination, but analyses of GRACE intersatellite ranging data show that all models are still imperfect on basin and subbasin scales, especially near Antarctica. For the M (sub 2) constituent, errors in purely hydrodynamic models are now almost comparable to the 1980-era Schwiderski empirical solution, indicating marked advancement in dynamical modeling. Assessing model accuracy using tidal currents remains problematic owing to uncertainties in in situ current meter estimates and the inability to isolate the barotropic mode. Velocity tests against both acoustic tomography and current meters do confirm that assimilative models perform better than purely hydrodynamic models. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Reviews of Geophysics AU - Stammer, D AU - Ray, R D AU - Andersen, O B AU - Arbic, B K AU - Bosch, W AU - Carrere, L AU - Cheng, Y AU - Chinn, D S AU - Dushaw, B D AU - Egbert, G D AU - Erofeeva, S Y AU - Fok, H S AU - Green, J A M AU - Griffiths, S AU - King, M A AU - Lapin, V AU - Lemoine, F G AU - Luthcke, S B AU - Lyard, F AU - Morison, J AU - Mueller, M AU - Padman, L AU - Richman, J G AU - Shriver, J F AU - Shum, C K AU - Taguchi, E AU - Yi, Y Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 243 EP - 282 PB - American Geophysical Union, Washington, DC VL - 52 IS - 3 SN - 8755-1209, 8755-1209 KW - ocean circulation KW - global KW - altimetry KW - geodetic networks KW - geodesy KW - satellite methods KW - tides KW - Antarctic ice sheet KW - Antarctica KW - hydrodynamics KW - atmospheric pressure KW - world ocean KW - remote sensing KW - 20:Applied geophysics KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664434613?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reviews+of+Geophysics&rft.atitle=Accuracy+assessment+of+global+barotropic+ocean+tide+models&rft.au=Stammer%2C+D%3BRay%2C+R+D%3BAndersen%2C+O+B%3BArbic%2C+B+K%3BBosch%2C+W%3BCarrere%2C+L%3BCheng%2C+Y%3BChinn%2C+D+S%3BDushaw%2C+B+D%3BEgbert%2C+G+D%3BErofeeva%2C+S+Y%3BFok%2C+H+S%3BGreen%2C+J+A+M%3BGriffiths%2C+S%3BKing%2C+M+A%3BLapin%2C+V%3BLemoine%2C+F+G%3BLuthcke%2C+S+B%3BLyard%2C+F%3BMorison%2C+J%3BMueller%2C+M%3BPadman%2C+L%3BRichman%2C+J+G%3BShriver%2C+J+F%3BShum%2C+C+K%3BTaguchi%2C+E%3BYi%2C+Y&rft.aulast=Stammer&rft.aufirst=D&rft.date=2014-09-01&rft.volume=52&rft.issue=3&rft.spage=243&rft.isbn=&rft.btitle=&rft.title=Reviews+of+Geophysics&rft.issn=87551209&rft_id=info:doi/10.1002%2F2014RG000450 L2 - http://www.agu.org/journals/rg/ 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 - 124 N1 - PubXState - DC N1 - Document feature - illus. incl. 15 tables N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - altimetry; Antarctic ice sheet; Antarctica; atmospheric pressure; geodesy; geodetic networks; global; hydrodynamics; ocean circulation; remote sensing; satellite methods; tides; world ocean DO - http://dx.doi.org/10.1002/2014RG000450 ER - TY - JOUR T1 - Arctic sea ice in transformation; a review of recent observed changes and impacts on biology and human activity AN - 1664434409; 2015-023636 AB - Sea ice in the Arctic is one of the most rapidly changing components of the global climate system. Over the past few decades, summer areal extent has declined over 30%, and all months show statistically significant declining trends. New satellite missions and techniques have greatly expanded information on sea ice thickness, but many uncertainties remain in the satellite data and long-term records are sparse. However, thickness observations and other satellite-derived data indicate a 40% decline in thickness, due in large part to the loss of thicker, older ice cover. The changes in sea ice are happening faster than models have projected. With continued increasing temperatures, summer ice-free conditions are likely sometime in the coming decades, though there are substantial uncertainties in the exact timing and high interannual variability will remain as sea ice decreases. The changes in Arctic sea ice are already having an impact on flora and fauna in the Arctic. Some species will face increasing challenges in the future, while new habitat will open up for other species. The changes are also affecting people living and working in the Arctic. Native communities are facing challenges to their traditional ways of life, while new opportunities open for shipping, fishing, and natural resource extraction. Significant progress has been made in recent years in understanding of Arctic sea ice and its role in climate, the ecosystem, and human activities. However, significant challenges remain in furthering the knowledge of the processes, impacts, and future evolution of the system. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Reviews of Geophysics AU - Meier, Walter N AU - Hovelsrud, Greta K AU - Oort, Bob E H AU - Key, Jeffrey R AU - Kovacs, Kit M AU - Michel, Christine AU - Haas, Christian AU - Granskog, Mats A AU - Gerland, Sebastian AU - Perovich (CRREL), Donald K AU - Makshtas, Alexander AU - Reist, James D Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 185 EP - 217 PB - American Geophysical Union, Washington, DC VL - 52 IS - 3 SN - 8755-1209, 8755-1209 KW - human activity KW - sea ice KW - ice cover KW - global change KW - ecosystems KW - environmental effects KW - climate change KW - observations KW - ice KW - Arctic Ocean KW - ecology KW - biology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664434409?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reviews+of+Geophysics&rft.atitle=Arctic+sea+ice+in+transformation%3B+a+review+of+recent+observed+changes+and+impacts+on+biology+and+human+activity&rft.au=Meier%2C+Walter+N%3BHovelsrud%2C+Greta+K%3BOort%2C+Bob+E+H%3BKey%2C+Jeffrey+R%3BKovacs%2C+Kit+M%3BMichel%2C+Christine%3BHaas%2C+Christian%3BGranskog%2C+Mats+A%3BGerland%2C+Sebastian%3BPerovich+%28CRREL%29%2C+Donald+K%3BMakshtas%2C+Alexander%3BReist%2C+James+D&rft.aulast=Meier&rft.aufirst=Walter&rft.date=2014-09-01&rft.volume=52&rft.issue=3&rft.spage=185&rft.isbn=&rft.btitle=&rft.title=Reviews+of+Geophysics&rft.issn=87551209&rft_id=info:doi/10.1002%2F2013RG000431 L2 - http://www.agu.org/journals/rg/ 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 - 278 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Arctic Ocean; biology; climate change; ecology; ecosystems; environmental effects; global change; human activity; ice; ice cover; observations; sea ice DO - http://dx.doi.org/10.1002/2013RG000431 ER - TY - JOUR T1 - The landscape of Titan as witness to its climate evolution AN - 1645572469; 2015-004229 AB - We investigated the range of Titan climate evolution hypotheses regulated by the role, sources, and availability of methane. We analyzed all available image data (principally synthetic aperture radar (SAR)) of Titan's landscape through the T-86 encounter, starting with focused examinations of terrains that carry the markers of climate evolution. Traditional geologic and geomorphic landscape analysis was used to perform morphometric characterization, establish time-stratigraphic relationships, and interpret local and regional geologic process-oriented evolutionary histories. We then assayed the distribution of terrains we identified with respect to both their latitudinal and altimetric occurrence. Our analysis of the terrain types and distributions was used to evaluate and rank the various climate evolution scenarios. We favor progressive hypotheses, which include a relatively brief period in which precipitation was able to affect geomorphic change in low latitudes at scales perceivable in SAR data, with subsequent gradual decline of precipitation intensity coupled with an increasing poleward restriction. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Moore, Jeffrey M AU - Howard, Alan D AU - Morgan, Alexander M Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 2060 EP - 2077 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 9 SN - 2169-9097, 2169-9097 KW - icy satellites KW - aliphatic hydrocarbons KW - landforms KW - atmospheric precipitation KW - paleoclimatology KW - climate change KW - nitrogen KW - Cassini-Huygens Mission KW - transport KW - SAR KW - Titan Satellite KW - satellites KW - solar system KW - methane KW - elevation KW - atmosphere KW - morphometry KW - altimetry KW - alkanes KW - organic compounds KW - terrains KW - steady-state processes KW - lacustrine environment KW - hydrocarbons KW - fluvial features KW - fluviolacustrine environment KW - latitude KW - geomorphology KW - wind transport KW - landscapes KW - fluvial environment KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645572469?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=The+landscape+of+Titan+as+witness+to+its+climate+evolution&rft.au=Moore%2C+Jeffrey+M%3BHoward%2C+Alan+D%3BMorgan%2C+Alexander+M&rft.aulast=Moore&rft.aufirst=Jeffrey&rft.date=2014-09-01&rft.volume=119&rft.issue=9&rft.spage=2060&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004608 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 98 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; altimetry; atmosphere; atmospheric precipitation; Cassini-Huygens Mission; climate change; elevation; fluvial environment; fluvial features; fluviolacustrine environment; geomorphology; hydrocarbons; icy satellites; lacustrine environment; landforms; landscapes; latitude; methane; morphometry; nitrogen; organic compounds; paleoclimatology; SAR; satellites; solar system; steady-state processes; terrains; Titan Satellite; transport; wind transport DO - http://dx.doi.org/10.1002/2014JE004608 ER - TY - JOUR T1 - Mars Science Laboratory relative humidity observations; initial results AN - 1645571254; 2015-004232 AB - The Mars Science Laboratory (MSL) made a successful landing at Gale crater early August 2012. MSL has an environmental instrument package called the Rover Environmental Monitoring Station (REMS) as a part of its scientific payload. REMS comprises instrumentation for the observation of atmospheric pressure, temperature of the air, ground temperature, wind speed and direction, relative humidity (REMS-H), and UV measurements. We concentrate on describing the REMS-H measurement performance and initial observations during the first 100 MSL sols as well as constraining the REMS-H results by comparing them with earlier observations and modeling results. The REMS-H device is based on polymeric capacitive humidity sensors developed by Vaisala Inc., and it makes use of transducer electronics section placed in the vicinity of the three humidity sensor heads. The humidity device is mounted on the REMS boom providing ventilation with the ambient atmosphere through a filter protecting the device from airborne dust. The final relative humidity results appear to be convincing and are aligned with earlier indirect observations of the total atmospheric precipitable water content. The water mixing ratio in the atmospheric surface layer appears to vary between 30 and 75 ppm. When assuming uniform mixing, the precipitable water content of the atmosphere is ranging from a few to six precipitable micrometers. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Harri, Ari-Matti AU - Genzer, M AU - Kemppinen, O AU - Gomez-Elvira, J AU - Haberle, R AU - Polkko, J AU - Savijarvi, H AU - Renno, N AU - Rodriguez-Manfredi, J A AU - Schmidt, W AU - Richardson, M AU - Siili, T AU - Paton, M AU - de la Torre-Juarez, M AU - Makinen, T AU - Newman, C AU - Rafkin, S AU - Mischna, M AU - Merikallio, S AU - Haukka, H AU - Martin-Torres, J AU - Komu, M AU - Zorzano, M P AU - Peinado, V AU - Vazquez, L AU - Urqui, R Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 2132 EP - 2147 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 9 SN - 2169-9097, 2169-9097 KW - water KW - atmosphere KW - Mars KW - temperature KW - Gale Crater KW - terrestrial planets KW - planets KW - relative humidity KW - humidity KW - Rover Environmental Monitoring Station KW - mixing KW - Mars Science Laboratory KW - atmospheric pressure KW - water content KW - winds KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645571254?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Mars+Science+Laboratory+relative+humidity+observations%3B+initial+results&rft.au=Harri%2C+Ari-Matti%3BGenzer%2C+M%3BKemppinen%2C+O%3BGomez-Elvira%2C+J%3BHaberle%2C+R%3BPolkko%2C+J%3BSavijarvi%2C+H%3BRenno%2C+N%3BRodriguez-Manfredi%2C+J+A%3BSchmidt%2C+W%3BRichardson%2C+M%3BSiili%2C+T%3BPaton%2C+M%3Bde+la+Torre-Juarez%2C+M%3BMakinen%2C+T%3BNewman%2C+C%3BRafkin%2C+S%3BMischna%2C+M%3BMerikallio%2C+S%3BHaukka%2C+H%3BMartin-Torres%2C+J%3BKomu%2C+M%3BZorzano%2C+M+P%3BPeinado%2C+V%3BVazquez%2C+L%3BUrqui%2C+R&rft.aulast=Harri&rft.aufirst=Ari-Matti&rft.date=2014-09-01&rft.volume=119&rft.issue=9&rft.spage=2132&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004514 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 47 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - atmosphere; atmospheric pressure; Gale Crater; humidity; Mars; Mars Science Laboratory; mixing; planets; relative humidity; Rover Environmental Monitoring Station; temperature; terrestrial planets; water; water content; winds DO - http://dx.doi.org/10.1002/2013JE004514 ER - TY - JOUR T1 - Variability of Regional TOA Flux Diurnal Cycle Composites at the Monthly Time Scale AN - 1642331909; 20792004 AB - Diurnal variability is a fundamental component of Earths climate system. Clouds, temperature, and precipitation exhibit robust responses to the daily cycle of solar insolation. Recent work indicates significant variability in the top-of-the-atmosphere (TOA) flux diurnal cycle in the tropics associated with monthly changes in the cloud diurnal cycle evolution. It has been proposed that the observed month-to-month variations in the TOA flux diurnal cycle are caused by anomalies in the atmospheric dynamic and thermodynamic state. This hypothesis is tested using a regression analysis to quantify the relationship between diurnal cycle shape and the atmospheric dynamic and thermodynamic state. TOA radiative fluxes are obtained from Clouds and the Earths Radiant Energy System (CERES) Edition 3 data and the atmospheric dynamic and thermodynamic state is taken from the European Centre for Medium-Range Weather Forecasts (ECMWF) Interim Re-Analysis. Four regions representing traditional diurnal cycle regimes are used in this analysis: North Africa (land nonconvective), central South America (land convective), Peru marine stratocumulus (ocean nonconvective), and Indian Ocean (ocean convective). The results show a statistically significant diurnal cycle shape change and cloud response related to monthly atmospheric state anomalies. Using the single-variable regression relationships to predict monthly diurnal cycle variability shows improvements of 1%18% over assuming a climatological diurnal cycle shape; the most significant gains are found in North Africa. The proposed hypothesis, therefore, contributes to diurnal cycle variability explaining at least 10%-20% of the total monthly-mean diurnal cycle variability. JF - Journal of the Atmospheric Sciences AU - Taylor, Patrick C AD - Climate Science Branch, NASA Langley Research Center, Hampton, Virginia Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 3484 EP - 3498 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 71 IS - 9 SN - 0022-4928, 0022-4928 KW - Advanced Polymers Abstracts (EP); Environmental Engineering Abstracts (EN); Composites Industry Abstracts (ED); Engineered Materials Abstracts, Ceramics (EC); Aerospace & High Technology Database (AH) KW - Clouds KW - Thermodynamics KW - Land KW - Flux KW - Oceans KW - Dynamical systems KW - Atmospherics KW - Dynamics KW - Marine UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642331909?accountid=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+the+Atmospheric+Sciences&rft.atitle=Variability+of+Regional+TOA+Flux+Diurnal+Cycle+Composites+at+the+Monthly+Time+Scale&rft.au=Taylor%2C+Patrick+C&rft.aulast=Taylor&rft.aufirst=Patrick&rft.date=2014-09-01&rft.volume=71&rft.issue=9&rft.spage=3484&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+Atmospheric+Sciences&rft.issn=00224928&rft_id=info:doi/10.1175%2FJAS-D-13-0336.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Number of references - 41 N1 - Last updated - 2016-06-30 N1 - SubjectsTermNotLitGenreText - Marine DO - http://dx.doi.org/10.1175/JAS-D-13-0336.1 ER - TY - JOUR T1 - Decadal trends in global pelagic ocean chlorophyll; a new assessment integrating multiple satellites, in situ data, and models AN - 1637541961; 2014-102285 AB - Quantifying change in ocean biology using satellites is a major scientific objective. We document trends globally for the period 1998-2012 by integrating three diverse methodologies: ocean color data from multiple satellites, bias correction methods based on in situ data, and data assimilation to provide a consistent and complete global representation free of sampling biases. The results indicated no significant trend in global pelagic ocean chlorophyll over the 15 year data record. These results were consistent with previous findings that were based on the first 6 years and first 10 years of the SeaWiFS mission. However, all of the Northern Hemisphere basins (north of 10 degrees latitude), as well as the Equatorial Indian basin, exhibited significant declines in chlorophyll. Trend maps showed the local trends and their change in percent per year. These trend maps were compared with several other previous efforts using only a single sensor (SeaWiFS) and more limited time series, showing remarkable consistency. These results suggested the present effort provides a path forward to quantifying global ocean trends using multiple satellite missions, which is essential if we are to understand the state, variability, and possible changes in the global oceans over longer time scales. Abstract Copyright (2014), . The Authors. JF - Journal of Geophysical Research: Oceans AU - Gregg, Watson W AU - Rousseaux, Cecile S Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 5921 EP - 5933 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 9 SN - 2169-9275, 2169-9275 KW - ocean circulation KW - numerical models KW - in situ KW - time series analysis KW - pigments KW - pelagic environment KW - statistical analysis KW - SeaWiFS KW - satellite methods KW - chlorophyll KW - nutrients KW - organic compounds KW - ecology KW - porphyrins KW - world ocean KW - remote sensing KW - productivity KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637541961?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Decadal+trends+in+global+pelagic+ocean+chlorophyll%3B+a+new+assessment+integrating+multiple+satellites%2C+in+situ+data%2C+and+models&rft.au=Gregg%2C+Watson+W%3BRousseaux%2C+Cecile+S&rft.aulast=Gregg&rft.aufirst=Watson&rft.date=2014-09-01&rft.volume=119&rft.issue=9&rft.spage=5921&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2014JC010158 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 - 40 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - chlorophyll; ecology; in situ; numerical models; nutrients; ocean circulation; organic compounds; pelagic environment; pigments; porphyrins; productivity; remote sensing; satellite methods; SeaWiFS; statistical analysis; time series analysis; world ocean DO - http://dx.doi.org/10.1002/2014JC010158 ER - TY - JOUR T1 - The effects of parent-body hydrothermal heating on amino acid abundances in CI-like chondrites AN - 1629943623; 2014-094191 JF - Polar Science AU - Burton, Aaron S AU - Grunsfeld, Sarah AU - Elsila, Jamie E AU - Glavin, Daniel P AU - Dworkin, Jason P Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 255 EP - 263 PB - Elsevier for National Institute of Polar Research, Japan, Tokyo VL - 8 IS - 3 SN - 1873-9652, 1873-9652 KW - CI chondrites KW - stony meteorites KW - Orgueil Meteorite KW - parent bodies KW - carbonaceous chondrites KW - aqueous solutions KW - Y 980115 KW - temperature KW - meteorites KW - organic compounds KW - organic acids KW - reagents KW - amino acids KW - chondrites KW - chemical composition KW - Y 86029 KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943623?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Polar+Science&rft.atitle=The+effects+of+parent-body+hydrothermal+heating+on+amino+acid+abundances+in+CI-like+chondrites&rft.au=Burton%2C+Aaron+S%3BGrunsfeld%2C+Sarah%3BElsila%2C+Jamie+E%3BGlavin%2C+Daniel+P%3BDworkin%2C+Jason+P&rft.aulast=Burton&rft.aufirst=Aaron&rft.date=2014-09-01&rft.volume=8&rft.issue=3&rft.spage=255&rft.isbn=&rft.btitle=&rft.title=Polar+Science&rft.issn=18739652&rft_id=info:doi/10.1016%2Fj.polar.2014.05.002 L2 - http://www.sciencedirect.com/science/journal/18739652 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 55 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-12-04 N1 - SubjectsTermNotLitGenreText - amino acids; aqueous solutions; carbonaceous chondrites; chemical composition; chondrites; CI chondrites; meteorites; organic acids; organic compounds; Orgueil Meteorite; parent bodies; reagents; stony meteorites; temperature; Y 86029; Y 980115 DO - http://dx.doi.org/10.1016/j.polar.2014.05.002 ER - TY - JOUR T1 - Selection of DNA aptamers against uropathogenic Escherichia coli NSM59 by quantitative PCR controlled Cell-SELEX AN - 1627969140; 20958696 AB - In order to better control nosocomial infections, and facilitate the most prudent and effective use of antibiotics, improved strategies for the rapid detection and identification of problematic bacterial pathogens are required. DNA aptamers have much potential in the development of diagnostic assays and biosensors to address this important healthcare need, but further development of aptamers targeting common pathogens, and the strategies used to obtain specific aptamers are required. Here we demonstrate the application of a quantitative PCR (qPCR) controlled Cell-SELEX process, coupled with downstream secondary-conformation-based aptamer profiling. We used this approach to identify and select DNA aptamers targeted against uropathogenic Escherichia coli, for which specific aptamers are currently lacking, despite the prevalence of these infections. The use of qPCR to monitor the Cell-SELEX process permitted a minimal number of SELEX cycles to be employed, as well as the cycle-by-cycle optimisation of standard PCR amplification of recovered aptamer pools at each round. Identification of useful aptamer candidates was also facilitated by profiling of secondary conformations and selection based on putative aptamer secondary structure. One aptamer selected this way (designated EcA5-27), displaying a guanine-quadruplex sequence motif, was shown to have high affinity and specificity for target cells, and the potential to discriminate between distinct strains of E. coli, highlighting the possibility for development of aptamers selectively recognising pathogenic strains. Overall, the identified aptamers hold much potential for the development of rapid diagnostic assays for nosocomial urinary tract infections caused by E. coli. JF - Journal of Microbiological Methods AU - Savory, Nasa AU - Nzakizwanayo, Jonathan AU - Abe, Koichi AU - Yoshida, Wataru AU - Ferri, Stefano AU - Dedi, Cinzia AU - Jones, Brian V AU - Ikebukuro, Kazunori Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 94 EP - 100 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 104 SN - 0167-7012, 0167-7012 KW - Biotechnology and Bioengineering Abstracts; Microbiology Abstracts B: Bacteriology; Biochemistry Abstracts 2: Nucleic Acids; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Aptamers KW - Cell-SELEX KW - Escherichia coli KW - Nosocomial infections KW - Urinary tract infections KW - Secondary structure KW - Antibiotics KW - Pathogens KW - Urinary tract KW - Biosensors KW - Protein structure KW - Nosocomial infection KW - Polymerase chain reaction KW - Hospitals KW - Conformation KW - W 30955:Biosensors KW - N 14810:Methods KW - A 01300:Methods KW - J 02300:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627969140?accountid=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+Microbiological+Methods&rft.atitle=Selection+of+DNA+aptamers+against+uropathogenic+Escherichia+coli+NSM59+by+quantitative+PCR+controlled+Cell-SELEX&rft.au=Savory%2C+Nasa%3BNzakizwanayo%2C+Jonathan%3BAbe%2C+Koichi%3BYoshida%2C+Wataru%3BFerri%2C+Stefano%3BDedi%2C+Cinzia%3BJones%2C+Brian+V%3BIkebukuro%2C+Kazunori&rft.aulast=Savory&rft.aufirst=Nasa&rft.date=2014-09-01&rft.volume=104&rft.issue=&rft.spage=94&rft.isbn=&rft.btitle=&rft.title=Journal+of+Microbiological+Methods&rft.issn=01677012&rft_id=info:doi/10.1016%2Fj.mimet.2014.06.016 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Protein structure; Biosensors; Aptamers; Secondary structure; Nosocomial infection; Polymerase chain reaction; Antibiotics; Urinary tract; Pathogens; Conformation; Hospitals; Escherichia coli DO - http://dx.doi.org/10.1016/j.mimet.2014.06.016 ER - TY - JOUR T1 - Label-free detection of C-reactive protein using a carbon nanofiber based biosensor AN - 1627956698; 20919268 AB - We report the sensitive detection of C-reactive protein (CRP), a biomarker for cardiac disease, using a carbon nanofiber based biosensor platform. Vertically aligned carbon nanofibers were grown using plasma enhanced chemical vapor deposition to fabricate nanoelectrode arrays in a 33 configuration. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used for the CRP detection. The CV responses show a 25% reduction in redox current upon the immobilization of anti-CRP on the electrode where as a 30% increase in charge transfer resistance is seen from EIS. Further reduction in redox current and increase in charge transfer resistance result from binding of CRP on anti-CRP immobilized surface, proportional to the concentration of the CRP target. The detection limit of the sensor is found to be ~90pM or ~11ng/ml, which is in the clinically relevant range. Control tests using non-specific myoglobin antigen confirmed the specificity of the present approach. JF - Biosensors and Bioelectronics AU - Gupta, Rakesh K AU - Periyakaruppan, Adaikkappan AU - Meyyappan, M AU - Koehne, Jessica E AD - NASA Ames Research Center, Moffett Field, CA 94035, USA Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 112 EP - 119 PB - Elsevier B.V., 660 White Plains Rd. Tarrytown NY 10591-5153 United States VL - 59 SN - 0956-5663, 0956-5663 KW - Biotechnology and Bioengineering Abstracts KW - Biosensors KW - Carbon nanofibers KW - C-reactive protein KW - Nanoelectrode array KW - Electrical impedance spectroscopy etc. KW - Vapors KW - Carbon KW - Electrodes KW - myoglobin KW - Spectroscopy KW - biomarkers KW - Immobilization KW - Heart diseases KW - W 30955:Biosensors UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627956698?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biosensors+and+Bioelectronics&rft.atitle=Label-free+detection+of+C-reactive+protein+using+a+carbon+nanofiber+based+biosensor&rft.au=Gupta%2C+Rakesh+K%3BPeriyakaruppan%2C+Adaikkappan%3BMeyyappan%2C+M%3BKoehne%2C+Jessica+E&rft.aulast=Gupta&rft.aufirst=Rakesh&rft.date=2014-09-01&rft.volume=59&rft.issue=&rft.spage=112&rft.isbn=&rft.btitle=&rft.title=Biosensors+and+Bioelectronics&rft.issn=09565663&rft_id=info:doi/10.1016%2Fj.bios.2014.03.027 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Biosensors; Vapors; Carbon; Electrodes; myoglobin; Spectroscopy; biomarkers; Immobilization; Heart diseases; C-reactive protein DO - http://dx.doi.org/10.1016/j.bios.2014.03.027 ER - TY - JOUR T1 - An estimate of the dust pickup current at Enceladus AN - 1623261089; 2014-089016 AB - We demonstrate that the acceleration of submicron dust originating at Enceladus by a reduced co-rotating E-field is capable of creating a dust pickup current perpendicular to the magnetic field with values ranging from 3 to 15 kA (depending upon the effective grain charge). Such a current represents a new contribution to the total pickup current in the region. As such, we suggest that dust pickup currents, along with ion and electron pickup currents, are all active within the plume. JF - Icarus AU - Farrell, William M AU - Wahlund, J E AU - Morooka, M AU - Gurnett, D A AU - Kurth, R J AU - MacDowall, R J Y1 - 2014/09/01/ PY - 2014 DA - 2014 Sep 01 SP - 217 EP - 221 PB - Elsevier, New York, NY VL - 239 SN - 0019-1035, 0019-1035 KW - icy satellites KW - plumes KW - cosmic dust KW - Cassini-Huygens Mission KW - electrical field KW - Enceladus Satellite KW - satellites KW - ions KW - interplanetary dust KW - size KW - electrons KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623261089?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=An+estimate+of+the+dust+pickup+current+at+Enceladus&rft.au=Farrell%2C+William+M%3BWahlund%2C+J+E%3BMorooka%2C+M%3BGurnett%2C+D+A%3BKurth%2C+R+J%3BMacDowall%2C+R+J&rft.aulast=Farrell&rft.aufirst=William&rft.date=2014-09-01&rft.volume=239&rft.issue=&rft.spage=217&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.05.034 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 28 N1 - PubXState - NY N1 - Document feature - illus. N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - Cassini-Huygens Mission; cosmic dust; electrical field; electrons; Enceladus Satellite; icy satellites; interplanetary dust; ions; plumes; satellites; size DO - http://dx.doi.org/10.1016/j.icarus.2014.05.034 ER - TY - JOUR T1 - The thermal expansion of particles and their secular orbital evolution as they circle a planet AN - 1623256820; 2014-089009 AB - The thermal expansion and contraction of particles orbiting a planet can cause secular orbit evolution. This effect, called here the thermal expansion effect, depends on particles entering and exiting the shadow of the body they orbit. A particle cools off in the shadow and heats up again in the sunshine, suffering thermal contraction and expansion. The changing cross-section that the particle presents to solar radiation pressure, plus a time lag due to thermal inertia, lead to a net along-track force. The effect causes outward drift for rocky particles in circular orbits. For particles in the size range approximately 0.002-0.02 m orbiting the inner planets, particle orbits can outwardly evolve at the rate of approximately 0.1R (sub Plan) per million years for Mars to approximately 1R (sub Plan) per million years for Mercury for distances approximately 2R (sub Plan) from the body, where R (sub Plan) is the planet's radius. Poynting-Robertson dominates thermal expansion beyond a few RPlan for the inner planets. Hence there are distances from a planet where the effects balance, depending on particle size. Orbits evolving outward from the thermal expansion effect would stop there, as well as those inwardly evolving from Poynting-Robertson. Thus particles would accumulate in these places, assuming the absence of other forces. Mars appears to be the best candidate for the operation of the thermal expansion effect. Particles in the size range considered here and orbiting in the Phobos-Deimos region would tend to be collected by the moons, sweeping the particles up and perhaps helping keep the region free of dust. The thermal expansion effect is overwhelmed by Poynting-Robertson for rocky particles orbiting Jupiter and Saturn and thus is unimportant; these planets are not considered here. For particles orbiting small asteroids, the thermal expansion effect is much larger than the Poynting-Robertson effect, but both are overwhelmed by ordinary solar radiation pressure, which increases orbital eccentricities rapidly. Meteoroids in eccentric orbits about the Sun also suffer the thermal expansion effect, but with only approximately 0.0003e (super 2) AU change in semimajor axis over a million years for a 2 m meteoroid orbiting between Mercury and Earth. JF - Icarus AU - Rubincam, David Parry Y1 - 2014/09/01/ PY - 2014 DA - 2014 Sep 01 SP - 96 EP - 104 PB - Elsevier, New York, NY VL - 239 SN - 0019-1035, 0019-1035 KW - thermal inertia KW - asteroids KW - near-Earth asteroids KW - orbits KW - Jupiter KW - Mars KW - meteoroids KW - interplanetary dust KW - giant planets KW - eccentricity KW - Saturn KW - Mercury Planet KW - cooling KW - Poynting-Robertson effect KW - outer planets KW - satellites KW - Deimos Satellite KW - Phobos Satellite KW - near-Earth objects KW - Moon KW - secular variations KW - thermal expansion KW - size KW - terrestrial planets KW - planets KW - cosmic dust KW - contraction KW - solar radiation KW - heating KW - particles KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256820?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+thermal+expansion+of+particles+and+their+secular+orbital+evolution+as+they+circle+a+planet&rft.au=Rubincam%2C+David+Parry&rft.aulast=Rubincam&rft.aufirst=David&rft.date=2014-09-01&rft.volume=239&rft.issue=&rft.spage=96&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.05.025 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 29 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - asteroids; contraction; cooling; cosmic dust; Deimos Satellite; eccentricity; giant planets; heating; interplanetary dust; Jupiter; Mars; Mercury Planet; meteoroids; Moon; near-Earth asteroids; near-Earth objects; orbits; outer planets; particles; Phobos Satellite; planets; Poynting-Robertson effect; satellites; Saturn; secular variations; size; solar radiation; terrestrial planets; thermal expansion; thermal inertia DO - http://dx.doi.org/10.1016/j.icarus.2014.05.025 ER - TY - JOUR T1 - Global distribution of lunar impact melt flows AN - 1623256790; 2014-089010 AB - In this study, we analyzed the distribution and properties of 146 craters with impact melt deposits exterior to their rims. Many of these craters were only recently discovered due to their unusual radar properties in the near-global Mini-RF data set. We find that most craters with exterior deposits of impact melt are small, < or =20 km, and that the smallest craters have the longest melt flows relative to their size. In addition, exterior deposits of impact melt are more common in the highlands than the mare. This may be the result of differing target properties in the highlands and mare, the difference in titanium content, or the greater variation of topography in the highlands. We find that 80% of complex craters and 60% of simple craters have melt directions that are coincident or nearly coincident with the lowest point in their rim, implying that pre-existing topography plays a dominant role in melt emplacement. This is likely due to movement during crater modification (complex craters) or breached crater rims (simple craters). We also find that impact melt flows have very high circular polarization ratios compared to other features on the Moon. This suggests that their surfaces are some of the roughest material on the Moon at the centimeter to decimeter scale, even though they appear smooth at the meter scale. JF - Icarus AU - Neish, C D AU - Madden, J AU - Carter, L M AU - Hawke, B R AU - Giguere, T AU - Bray, V J AU - Osinski, G R AU - Cahill, J T S Y1 - 2014/09/01/ PY - 2014 DA - 2014 Sep 01 SP - 105 EP - 117 PB - Elsevier, New York, NY VL - 239 SN - 0019-1035, 0019-1035 KW - cratering KW - imagery KW - impact features KW - Moon KW - Lunar Reconnaissance Orbiter KW - global KW - radar methods KW - lunar highlands KW - distribution KW - melts KW - lunar craters KW - emplacement KW - flows KW - impact melts KW - topography KW - craters KW - titanium KW - metals KW - surface features KW - Mini-RF instrument KW - impact craters KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256790?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Global+distribution+of+lunar+impact+melt+flows&rft.au=Neish%2C+C+D%3BMadden%2C+J%3BCarter%2C+L+M%3BHawke%2C+B+R%3BGiguere%2C+T%3BBray%2C+V+J%3BOsinski%2C+G+R%3BCahill%2C+J+T+S&rft.aulast=Neish&rft.aufirst=C&rft.date=2014-09-01&rft.volume=239&rft.issue=&rft.spage=105&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.05.049 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 53 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - cratering; craters; distribution; emplacement; flows; global; imagery; impact craters; impact features; impact melts; lunar craters; lunar highlands; Lunar Reconnaissance Orbiter; melts; metals; Mini-RF instrument; Moon; radar methods; surface features; titanium; topography DO - http://dx.doi.org/10.1016/j.icarus.2014.05.049 ER - TY - JOUR T1 - Laboratory observations and simulations of phase reddening AN - 1623256493; 2014-089015 AB - The visible reflectance spectrum of many Solar System bodies changes with changing viewing geometry for reasons not fully understood. It is often observed to redden (increasing spectral slope) with increasing solar phase angle, an effect known as phase reddening. Only once, in an observation of the martian surface by the Viking 1 lander, was reddening observed up to a certain phase angle with bluing beyond, making the reflectance ratio as a function of phase angle shaped like an arch. However, in laboratory experiments this arch-shape is frequently encountered. To investigate this, we measured the bidirectional reflectance of particulate samples of several common rock types in the 400-1000 nm wavelength range and performed ray-tracing simulations. We confirm the occurrence of the arch for surfaces that are forward scattering, i.e. are composed of semi-transparent particles and are smooth on the scale of the particles, and for which the reflectance increases from the lower to the higher wavelength in the reflectance ratio. The arch shape is reproduced by the simulations, which assume a smooth surface. However, surface roughness on the scale of the particles, such as the Hapke and van Horn (Hapke, B., van Horn, H. [1963]. J. Geophys. Res. 68, 4545-4570) fairy castles that can spontaneously form when sprinkling a fine powder, leads to monotonic reddening. A further consequence of this form of microscopic roughness (being indistinct without the use of a microscope) is a flattening of the disk function at visible wavelengths, i.e. Lommel-Seeliger-type scattering. The experiments further reveal monotonic reddening for reflectance ratios at near-IR wavelengths. The simulations fail to reproduce this particular reddening, and we suspect that it results from roughness on the surface of the particles. Given that the regolith of atmosphereless Solar System bodies is composed of small particles, our results indicate that the prevalence of monotonic reddening and Lommel-Seeliger-type scattering for these bodies results from microscopic roughness, both in the form of structures built by the particles and roughness on the surface of the particles themselves. It follows from the singular Viking 1 observation that the surface in front of the lander was composed of semi-transparent particles, and was smooth on the scale of the particle size. JF - Icarus AU - Schroeder, Stefanus E AU - Grynko, Y AU - Pommerol, A AU - Keller, H U AU - Thomas, N AU - Roush, T L Y1 - 2014/09/01/ PY - 2014 DA - 2014 Sep 01 SP - 201 EP - 216 PB - Elsevier, New York, NY VL - 239 SN - 0019-1035, 0019-1035 KW - limestone KW - spectrophotometry KW - bidirectional reflectance KW - volcanic rocks KW - igneous rocks KW - granites KW - Mars KW - simulation KW - laboratory studies KW - photometry KW - sedimentary rocks KW - plutonic rocks KW - phase angle KW - basalts KW - phase reddening KW - radiative transfer KW - roughness KW - geometry KW - wavelength KW - terrestrial planets KW - planets KW - optical properties KW - ray tracing KW - carbonate rocks KW - reflectance KW - regolith KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256493?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Laboratory+observations+and+simulations+of+phase+reddening&rft.au=Schroeder%2C+Stefanus+E%3BGrynko%2C+Y%3BPommerol%2C+A%3BKeller%2C+H+U%3BThomas%2C+N%3BRoush%2C+T+L&rft.aulast=Schroeder&rft.aufirst=Stefanus&rft.date=2014-09-01&rft.volume=239&rft.issue=&rft.spage=201&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.06.010 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 64 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - basalts; bidirectional reflectance; carbonate rocks; geometry; granites; igneous rocks; laboratory studies; limestone; Mars; optical properties; phase angle; phase reddening; photometry; planets; plutonic rocks; radiative transfer; ray tracing; reflectance; regolith; remote sensing; roughness; sedimentary rocks; simulation; spectrophotometry; terrestrial planets; volcanic rocks; wavelength DO - http://dx.doi.org/10.1016/j.icarus.2014.06.010 ER - TY - JOUR T1 - Water delivery and giant impacts in the "Grand Tack" scenario AN - 1623256421; 2014-089007 AB - A new model for terrestrial planet formation (Hansen [2009]. Astrophys. J., 703, 1131-1140; Walsh, K.J., et al. [2011]. Nature, 2011, 206-209) has explored accretion in a truncated protoplanetary disk, and found that such a configuration is able to reproduce the distribution of mass among the planets in the Solar System, especially the Earth/Mars mass ratio, which earlier simulations have generally not been able to match. Walsh et al. (Walsh, K.J., et al. [2011]. Nature, 2011, 206-209) tested a possible mechanism to truncate the disk-a two-stage, inward-then-outward migration of Jupiter and Saturn, as found in numerous hydrodynamical simulations of giant planet formation. In addition to truncating the disk and producing a more realistic Earth/Mars mass ratio, the migration of the giant planets also populates the asteroid belt with two distinct populations of bodies-the inner belt is filled by bodies originating inside of 3 AU, and the outer belt is filled with bodies originating from between and beyond the giant planets (which are hereafter referred to as 'primitive' bodies). One implication of the truncation mechanism proposed in Walsh et al. (Walsh, K.J., et al. [2011]. Nature, 2011, 206-209) is the scattering of primitive planetesimals onto planet-crossing orbits during the formation of the planets. We find here that the planets will accrete on order 1-2% of their total mass from these bodies. For an assumed value of 10% for the water mass fraction of the primitive planetesimals, this model delivers a total amount of water comparable to that estimated to be on the Earth today. The radial distribution of the planetary masses and the dynamical excitation of their orbits are a good match to the observed system. However, we find that a truncated disk leads to formation timescales more rapid than suggested by radiometric chronometers. In particular, the last giant impact is typically earlier than 20 Myr, and a substantial amount of mass is accreted after that event. This is at odds with the dating of the Moon-forming impact and the estimated amount of mass accreted by Earth following that event. However, 5 of the 27 planets larger than half an Earth mass formed in all simulations do experience large late impacts and subsequent accretion consistent with those constraints. JF - Icarus AU - O'Brien, David P AU - Walsh, Kevin J AU - Morbidelli, Alessandro AU - Raymond, Sean N AU - Mandell, Avi M Y1 - 2014/09/01/ PY - 2014 DA - 2014 Sep 01 SP - 74 EP - 84 PB - Elsevier, New York, NY VL - 239 SN - 0019-1035, 0019-1035 KW - water KW - solar system KW - Grand Tack model KW - accretion KW - asteroid belts KW - Moon KW - orbits KW - Jupiter KW - giant impacts KW - impacts KW - simulation KW - protoplanetary disk KW - distribution KW - giant planets KW - terrestrial planets KW - mass KW - planets KW - chronology KW - transport KW - dynamics KW - planetology KW - hydrodynamics KW - outer planets KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256421?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Water+delivery+and+giant+impacts+in+the+%22Grand+Tack%22+scenario&rft.au=O%27Brien%2C+David+P%3BWalsh%2C+Kevin+J%3BMorbidelli%2C+Alessandro%3BRaymond%2C+Sean+N%3BMandell%2C+Avi+M&rft.aulast=O%27Brien&rft.aufirst=David&rft.date=2014-09-01&rft.volume=239&rft.issue=&rft.spage=74&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.05.009 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 81 N1 - PubXState - NY N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - accretion; asteroid belts; chronology; distribution; dynamics; giant impacts; giant planets; Grand Tack model; hydrodynamics; impacts; Jupiter; mass; Moon; orbits; outer planets; planetology; planets; protoplanetary disk; simulation; solar system; terrestrial planets; transport; water DO - http://dx.doi.org/10.1016/j.icarus.2014.05.009 ER - TY - JOUR T1 - Evaluation of CMIP5 dynamic sea surface height multi-model simulations against satellite observations AN - 1566847373; 20646956 AB - We evaluate the representation of dynamic sea surface height (SSH) fields of 33 global coupled models (GCMs) contributed to the fifth phase of the Coupled Model Intercomparison Project (CMIP5). We use observations from satellite altimetry and basic performance metrics to quantify the ability of the GCMs to replicate observed SSH of the time-mean, seasonal cycle, and inter-annual variability patterns. The time-mean SSH representation has markedly improved from CMIP3 to CMIP5, both in terms of overall reduction in root-mean square differences, and in terms of reduced GCM ensemble spread. Biases of the time-mean SSH field in the Indian and Pacific Ocean equatorial regions are consistent with biases in the zonal surface wind stress fields identified with independent measurements. In the Southern Ocean, the latitude of the maximum meridional gradient of the zonal mean SSH CMIP5 models is shifted equatorward, consistent with the GCMs' spatial biases in the maximum of the zonal mean westerly surface wind stress fields. However, while the Southern Ocean SSH gradients correlate well with the maximum Antarctic circumpolar current transports, there is no significant correlation with the maximum zonal mean wind stress amplitudes, consistent with recent findings that the eddy parameterisations in GCMs dominate over wind stress amplitudes in this region. There is considerable spread across the CMIP5 ensemble for the seasonal and interannual SSH variability patterns. Because of the short observational period, the interannual variability patterns depend on the time-period over which they are derived, while no such dependency is found for the time-mean patterns. The model performance metrics for SSH presented here provide insight into GCM shortcoming due to inadequate model physics or processes. While the diagnostics of CMIP5 GCM performance relative to observations reveal that some models are clearly better than others, model performance is sensitive to the spatio-temporal scales chosen. JF - Climate Dynamics AU - Landerer, Felix W AU - Gleckler, Peter J AU - Lee, Tong AD - Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA, felix.w.landerer@jpl.nasa.gov Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1271 EP - 1283 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 43 IS - 5-6 SN - 0930-7575, 0930-7575 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Surface winds KW - Wind stress KW - Satellite altimetry KW - Variability KW - Mean winds KW - Correlations KW - Westerlies KW - Remote sensing KW - Antarctic KW - Current observations KW - Evaluation KW - PS, Antarctic Ocean, Antarctic Circumpolar Current KW - Ocean-atmosphere system KW - Seasonal variations KW - Wind KW - Marine KW - Climate models KW - Climates KW - Stress KW - Oceanic eddies KW - Atmospheric circulation KW - Model Studies KW - Ocean currents KW - Satellite sensing KW - Performance Evaluation KW - Interannual variability KW - Satellite data KW - Numerical simulations KW - Oceans KW - General circulation models KW - PS, Antarctic Ocean KW - M2 551.58:Climatology (551.58) KW - SW 0540:Properties of water KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566847373?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+Dynamics&rft.atitle=Evaluation+of+CMIP5+dynamic+sea+surface+height+multi-model+simulations+against+satellite+observations&rft.au=Landerer%2C+Felix+W%3BGleckler%2C+Peter+J%3BLee%2C+Tong&rft.aulast=Landerer&rft.aufirst=Felix&rft.date=2014-09-01&rft.volume=43&rft.issue=5-6&rft.spage=1271&rft.isbn=&rft.btitle=&rft.title=Climate+Dynamics&rft.issn=09307575&rft_id=info:doi/10.1007%2Fs00382-013-1939-x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 47 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Satellite altimetry; Wind stress; Satellite sensing; Remote sensing; Westerlies; Ocean-atmosphere system; Atmospheric circulation; Current observations; Seasonal variations; Ocean currents; Surface winds; Satellite data; Interannual variability; Mean winds; Climate models; Numerical simulations; General circulation models; Correlations; Oceanic eddies; Evaluation; Performance Evaluation; Variability; Oceans; Climates; Stress; Antarctic; Wind; Model Studies; PS, Antarctic Ocean, Antarctic Circumpolar Current; PS, Antarctic Ocean; Marine DO - http://dx.doi.org/10.1007/s00382-013-1939-x ER - TY - JOUR T1 - Spacecraft Occupant Protection Requirements: A Review of the Recent Changes AN - 1566845929; 20756886 AB - NASA has recently updated spacecraft design requirements for protecting crewmembers during dynamic spaceflight phases. The details of the update are available In a NASA publication (NASA TM-2013-217380) and are summarized here. Previously, NASA's occupant protection requirements relied primarily on the multiaxial dynamic response criterion, which NASA refers to as the Brinkley Dynamic Response Criteria (BDRC). Although simple to implement, there are several important ground rules that must be met for the injury predictions to be applicable. These include proper restraint, flail controls, proper seating support, pressure suit considerations, head protection including consideration of helmet mass, and spaceflight deconditioning. Even if these ground rules are met, there are limitations to the model that must be addressed, including: model validation, sex differences, age effects, anthropometry effects, and differences between the physical fitness of military test subjects and future crewmembers. To address these limitations, new injury assessment reference values (IARV) have been prescribed for the 5 super(th) percentile female and 95 super(th) percentile male Hybrid III anthropomorphic test devices (ATD). These metrics are head-injury criterion, head-rotational acceleration, neck injury criterion, neck-axial-force limits, flail prevention, and lumbar-axial compression force. Using these new ATD IARVs, NASA can have increased confidence that vehicle designs mitigate the risk of injury during dynamic phases of flight. JF - Aviation, Space, and Environmental Medicine AU - Somers, Jeffrey T AU - GOHMERT, DUSTIN M AU - Brinkley, James W AD - Wyle Science, Technology and Engineering Group, and the Crew and Thermal Systems Division, NASA Johnson Space Center, Houston, TX, jeff.somers@nasa.gov Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 940 EP - 948 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 9 SN - 0095-6562, 0095-6562 KW - Risk Abstracts; Health & Safety Science Abstracts KW - injury biomechanics KW - Hybrid III KW - multi-axial dynamic response criterion KW - Brinkley model KW - anthropomorphic test device KW - impact biomechanics KW - Prediction KW - Risk assessment KW - Age KW - Injuries KW - Helmets KW - Spacecraft KW - Health risks KW - Prevention KW - Neck injuries KW - Reviews KW - Hybrids KW - Military KW - R2 23020:Technological risks KW - H 1000:Occupational Safety and Health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566845929?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Spacecraft+Occupant+Protection+Requirements%3A+A+Review+of+the+Recent+Changes&rft.au=Somers%2C+Jeffrey+T%3BGOHMERT%2C+DUSTIN+M%3BBrinkley%2C+James+W&rft.aulast=Somers&rft.aufirst=Jeffrey&rft.date=2014-09-01&rft.volume=85&rft.issue=9&rft.spage=940&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.4004.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 80 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Risk assessment; Prediction; Health risks; Age; Prevention; Neck injuries; Injuries; Helmets; Hybrids; Reviews; Military; Spacecraft DO - http://dx.doi.org/10.3357/ASEM.4004.2014 ER - TY - JOUR T1 - Body Mass Changes During Long-Duration Spaceflight AN - 1566845552; 20756880 AB - Background: During early spaceflights, many crewmembers did not meet their caloric requirements and consequently lost body mass during flight, as assessed by a decrease in postflight body mass. Maintaining body mass during spaceflight is crucial for maintaining crew health and monitoring body mass is thus important to medical operations as well as being a key component of human research. Determining body mass becomes difficult in a microgravity environment. Methods: We report data from two mass measurement devices on the International Space Station (ISS): the Russian body mass measuring device (BMMD), which uses spring oscillation physics, and NASA's Space Linear Acceleration Mass Measurement Device (SLAMMD), which uses Newton's second law of motion (F = ma). Results: For 25 crewmembers whose body mass was measured on both devices, significant body mass loss occurred compared to preflight (gravimetric scale) and averaged -4.4% as assessed by BMMD and -2.8% as assessed by SLAMMD. After an initial loss in the first 30 d of flight, body mass remained constant through the rest of the mission, as determined using either device. The mean difference between the two devices was 1.1 kg when the closest SLAMMD and BMMD measurements were compared (6.9 + or - 6.2 d apart). Dietary intake during flight is approximately 80% of the World Health Organization estimated requirement and the decrease in body mass follows in-flight energy Intake closely on average. Conclusion: Body mass monitoring is important for monitoring crew health during a mission and to help ensure that crewmembers consume adequate energy intake to mitigate the risks of spaceflight. JF - Aviation, Space, and Environmental Medicine AU - Zwart, Sara R AU - Launius, Ryan D AU - Coen, Geoffrey K AU - MORGAN, JINNIFER L L AU - Charles, John B AU - Smith, Scott M AD - NASA Johnson Space Center, Houston, TX, scott.m.smith@nasa.gov Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 897 EP - 904 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 9 SN - 0095-6562, 0095-6562 KW - Health & Safety Science Abstracts; Risk Abstracts KW - body mass KW - energy intake KW - spaceflight KW - weightlessness KW - Risk assessment KW - Diets KW - Body mass KW - Energy KW - Ingestion KW - H 2000:Transportation KW - R2 23060:Medical and environmental health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566845552?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Body+Mass+Changes+During+Long-Duration+Spaceflight&rft.au=Zwart%2C+Sara+R%3BLaunius%2C+Ryan+D%3BCoen%2C+Geoffrey+K%3BMORGAN%2C+JINNIFER+L+L%3BCharles%2C+John+B%3BSmith%2C+Scott+M&rft.aulast=Zwart&rft.aufirst=Sara&rft.date=2014-09-01&rft.volume=85&rft.issue=9&rft.spage=897&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3979.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 21 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Diets; Risk assessment; Energy; Body mass; Ingestion DO - http://dx.doi.org/10.3357/ASEM.3979.2014 ER - TY - JOUR T1 - G-Loading and Vibration Effects on Heart and Respiration Rates AN - 1566844133; 20756887 AB - Background: Operational environments expose pilots and astronauts to sustained acceleration (G loading) and whole-body vibration, alone and in combination. Separately, the physiological effects of G loading and vibration have been well studied; both have effects similar to mild exercise. The few studies of combined G loading and vibration have not reported an Interaction between these factors on physiological responses. Methods: We tested the effects of G loading (+1 and +3.8 G sub(x)) and vibration (0.5 g sub(x) at 8, 12, and 16 Hz), alone and in combination, on heart and respiration rate. Results: We observed an effect of G loading on heart rate (average increase of 23 bpm, SD: 12) and respiration rate (average increase of 5 breaths per minute, SD: 5), an effect of vibration on heart rate, and an interaction on heart rate. With vibration, we observed heart rate increases of 4 bpm (SD: 3) with no increase in respiration rate. In the +1 G sub(x) condition, the largest heart rate increase occurred during low-frequency (8 Hz) vibration, while at +3.8 G sub(x), the largest heart rate increase occurred during high-frequency (16 Hz) vibration, demonstrating interaction. Discussion: Consistent with previous reports, our G-loading and vibration effects are similar to mild exercise. In addition, we observed an interaction between G loading and vibration on heart rate, with maximum heart rates occurring at a higher vibration frequency at +3.8 G sub(x) compared to +1 G sub(x). The observed interaction demonstrates that G-loading and vibration effects are not independent and can only be properly assessed during combined exposure. JF - Aviation, Space, and Environmental Medicine AU - Godinez, Angelica AU - LISTON, DORION B AU - AYZENBERG, RUTHIE AU - Toscano, William B AU - COWINGS, PATRICIA A AU - Stone, Leland S AD - NASA Ames Research Center, Moffett Field, CA, leland.s.stone@nasa.gov Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 949 EP - 953 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 9 SN - 0095-6562, 0095-6562 KW - Health & Safety Science Abstracts KW - stress KW - launch KW - ascent KW - interaction KW - autonomic nervous system KW - Vibration KW - Respiration KW - Heart rate KW - Physiological responses KW - Physiology KW - Pilots KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566844133?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=G-Loading+and+Vibration+Effects+on+Heart+and+Respiration+Rates&rft.au=Godinez%2C+Angelica%3BLISTON%2C+DORION+B%3BAYZENBERG%2C+RUTHIE%3BToscano%2C+William+B%3BCOWINGS%2C+PATRICIA+A%3BStone%2C+Leland+S&rft.aulast=Godinez&rft.aufirst=Angelica&rft.date=2014-09-01&rft.volume=85&rft.issue=9&rft.spage=949&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.1015.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 15 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Respiration; Vibration; Pilots; Physiology; Physiological responses; Heart rate DO - http://dx.doi.org/10.3357/ASEM.1015.2014 ER - TY - JOUR T1 - Comparison of Near-Surface Air Temperatures and MODIS Ice-Surface Temperatures at Summit, Greenland (2008-13) AN - 1566833198; 20727049 AB - Comparisons are described for infrared-derived cloud products retrieved from the Moderate Resolution Imaging Spectroradiometer (MODIS) and the Atmospheric Infrared Sounder (AIRS) using measured spatial response functions obtained from prelaunch AIRS calibration. One full day (1 January 2005) of global collection-5 MODIS and version-5 AIRS retrievals of cloud-top temperature Tc, effective cloud fraction f, and derived effective brightness temperature Tb,e is investigated. Comparisons of Tb,e demonstrate that MODIS and AIRS are essentially radiatively consistent and that MODIS Tb,e is 0.62 K higher than AIRS Tb,e for all scenes, increasing to 1.43 K for cloud described by AIRS as single layer and decreasing to 0.50 K for two-layer clouds. Somewhat larger differences in Tc and f are observed between the two instruments. The magnitudes of differences depend partly on whether MODIS uses a CO2-slicing or 11-m brightness temperature window retrieval method. Some cloud- and regime-type differences and similarities between AIRS and MODIS cloud products are traceable to the assumptions made about the number of cloud layers in AIRS and also to the MODIS retrieval method. This (partially) holistic comparison approach should be useful for ongoing algorithm refinements, rigorous assessments of climate applicability, and establishment of the capability of synergistic MODIS and AIRS retrievals for improved cloud quantities and also should be useful for future observations to be made by the National Polar-Orbiting Operational Environmental Satellite System (NPOESS) Preparatory Project (NPP). JF - Journal of Applied Meteorology and Climatology AU - Shuman, Christopher A AU - Hall, Dorothy K AU - DiGirolamo, Nicolo E AU - Mefford, Thomas K AU - Schnaubelt, Michael J AD - Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Baltimore, and NASA Goddard Space Flight Center, Greenbelt, Maryland Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 2171 EP - 2180 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 53 IS - 9 SN - 1558-8424, 1558-8424 KW - Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; Aqualine Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Climate change KW - Remote sensing KW - Algorithms KW - Surface radiation temperature KW - Air temperature KW - Greenland KW - Assessments KW - Calibrations KW - Meteorology KW - MODIS (Moderate Resolution Imaging Spectrometer) KW - Climatology KW - AN, Greenland KW - Mathematical models KW - Air Temperature KW - Climates KW - Temperature KW - Satellites KW - Imaging techniques KW - Clouds KW - Satellite data KW - Brightness temperature KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - M2 551.576:Clouds (551.576) KW - Q2 09244:Air-sea coupling KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566833198?accountid=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+Applied+Meteorology+and+Climatology&rft.atitle=Comparison+of+Near-Surface+Air+Temperatures+and+MODIS+Ice-Surface+Temperatures+at+Summit%2C+Greenland+%282008-13%29&rft.au=Shuman%2C+Christopher+A%3BHall%2C+Dorothy+K%3BDiGirolamo%2C+Nicolo+E%3BMefford%2C+Thomas+K%3BSchnaubelt%2C+Michael+J&rft.aulast=Shuman&rft.aufirst=Christopher&rft.date=2014-09-01&rft.volume=53&rft.issue=9&rft.spage=2171&rft.isbn=&rft.btitle=&rft.title=Journal+of+Applied+Meteorology+and+Climatology&rft.issn=15588424&rft_id=info:doi/10.1175%2FJAMC-D-14-0023.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 40 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Clouds; Mathematical models; Climate change; Climatology; Air temperature; Imaging techniques; Surface radiation temperature; Satellite data; Algorithms; Brightness temperature; MODIS (Moderate Resolution Imaging Spectrometer); Remote sensing; Temperature; Meteorology; Satellites; Calibrations; Assessments; Air Temperature; Climates; Greenland; AN, Greenland DO - http://dx.doi.org/10.1175/JAMC-D-14-0023.1 ER - TY - JOUR T1 - Calcium kinetics during bed rest with artificial gravity and exercise countermeasures AN - 1560103487; 20609050 AB - Summary: We assessed the potential for countermeasures to lessen the loss of bone calcium during bed rest. Subjects ingested less calcium during bed rest, and with artificial gravity, they also absorbed less calcium. With exercise, they excreted less calcium. To retain bone during bed rest, calcium intake needs to be maintained. Introduction: This study aims to assess the potential for artificial gravity (AG) and exercise (EX) to mitigate loss of bone calcium during space flight. Methods: We performed two studies: (1) a 21-day bed rest (BR) study with subjects receiving 1 h/day AG (n=8) or no AG (n=7) and (2) a 28-day BR study with 1 h/day resistance EX (n=10) or no EX (n=3). In both studies, stable isotopes of Ca were administered orally and intravenously, at baseline and after 10 days of BR, and blood, urine, and feces were sampled for up to 14 days post dosing. Tracers were measured using thermal ionization mass spectrometry. Data were analyzed by compartmental modeling. Results: Less Ca was absorbed during BR, resulting in lower Ca balance in BR+AG (-6.04 plus or minus 3.38 mmol/day, P=0.023). However, Ca balance did not change with BR+EX, even though absorbed Ca decreased and urinary Ca excretion increased, because endogenous excretion decreased, and there was a trend for increased bone deposition (P=0.06). Urinary N-telopeptide excretion increased in controls during BR, but not in the EX group. Markers of bone formation were not different between treatment groups for either study. Ca intake decreased during BR (by 5.4 mmol/day in the AG study and 2.8 mmol/day in the EX study), resulting in lower absorbed Ca. Conclusions: During BR (or space flight), Ca intake needs to be maintained or even increased with countermeasures such as exercise, to enable maintenance of bone Ca. JF - Osteoporosis International AU - Smith, S M AU - Castaneda-Sceppa, C AU - O'Brien, KO AU - Abrams, SA AU - Gillman, P AU - Brooks, N E AU - Cloutier, G J AU - Heer, M AU - Zwart AU - Wastney, ME AD - NASA Lyndon B. Johnson Space Center, Attn: Mail Code SK3, 2101 NASA Parkway, Houston, TX, 77058, USA, scott.m.smith@nasa.gov Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 2237 EP - 2244 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 25 IS - 9 SN - 0937-941X, 0937-941X KW - Physical Education Index; Calcium & Calcified Tissue Abstracts KW - Isotopes KW - Exercise physiology KW - Calcium KW - Bones KW - Gravity KW - Mass spectroscopy KW - Tracers KW - Objectives KW - Feces KW - Balance KW - Osteogenesis KW - Data processing KW - Space flight KW - Osteoporosis KW - Physical training KW - Blood KW - Urine KW - Kinetics KW - Bone loss KW - Excretion KW - Minerals KW - Immobilization KW - Modeling KW - T 2020:Nutrition and Metabolism KW - PE 030:Exercise, Health & Physical Fitness UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560103487?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aphysicaleducation&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Osteoporosis+International&rft.atitle=Calcium+kinetics+during+bed+rest+with+artificial+gravity+and+exercise+countermeasures&rft.au=Smith%2C+S+M%3BCastaneda-Sceppa%2C+C%3BO%27Brien%2C+KO%3BAbrams%2C+SA%3BGillman%2C+P%3BBrooks%2C+N+E%3BCloutier%2C+G+J%3BHeer%2C+M%3BZwart%3BWastney%2C+ME&rft.aulast=Smith&rft.aufirst=S&rft.date=2014-09-01&rft.volume=25&rft.issue=9&rft.spage=2237&rft.isbn=&rft.btitle=&rft.title=Osteoporosis+International&rft.issn=0937941X&rft_id=info:doi/10.1007%2Fs00198-014-2754-x LA - English DB - Physical Education Index N1 - Date revised - 2014-09-01 N1 - Number of references - 27 N1 - Last updated - 2014-11-12 N1 - SubjectsTermNotLitGenreText - Exercise physiology; Bones; Urine; Gravity; Objectives; Balance; Minerals; Modeling; Immobilization; Isotopes; Calcium; Data processing; Space flight; Osteoporosis; Mass spectroscopy; Physical training; Tracers; Blood; Kinetics; Bone loss; Excretion; Feces; Osteogenesis DO - http://dx.doi.org/10.1007/s00198-014-2754-x ER - TY - JOUR T1 - Using satellite remote sensing and household survey data to assess human health and nutrition response to environmental change AN - 1559012838; 4593383 AB - Climate change and degradation of ecosystem services functioning may threaten the ability of current agricultural systems to keep up with demand for adequate and inexpensive food and for clean water, waste disposal and other broader ecosystem services. Human health is likely to be affected by changes occurring across multiple geographic and time scales. Impacts range from increasing transmissibility and the range of vectorborne diseases, such as malaria and yellow fever, to undermining nutrition through deleterious impacts on food production and concomitant increases in food prices. This paper uses case studies to describe methods that make use of satellite remote sensing and Demographic and Health Survey data to better understand individual-level human health and nutrition outcomes. By bringing these diverse datasets together, the connection between environmental change and human health outcomes can be described through new research and analysis. Reprinted by permission of Springer JF - Population and environment AU - Brown, Molly E AU - Grace, Kathryn AU - Shively, Gerald AU - Johnson, Kiersten B AU - Carroll, Mark AD - University of Utah ; Purdue University ; US National Aeronautics and Space Administration Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 48 EP - 72 VL - 36 IS - 1 SN - 0199-0039, 0199-0039 KW - Economics KW - Environmental degradation KW - Environment KW - Climate change KW - Environmental change KW - Environmental effects KW - Surveys KW - Communication satellites KW - Health KW - Nutrition UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1559012838?accountid=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=Population+and+environment&rft.atitle=Using+satellite+remote+sensing+and+household+survey+data+to+assess+human+health+and+nutrition+response+to+environmental+change&rft.au=Brown%2C+Molly+E%3BGrace%2C+Kathryn%3BShively%2C+Gerald%3BJohnson%2C+Kiersten+B%3BCarroll%2C+Mark&rft.aulast=Brown&rft.aufirst=Molly&rft.date=2014-09-01&rft.volume=36&rft.issue=1&rft.spage=48&rft.isbn=&rft.btitle=&rft.title=Population+and+environment&rft.issn=01990039&rft_id=info:doi/10.1007%2Fs11111-013-0201-0 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2014-09-03 N1 - Last updated - 2014-09-03 N1 - SubjectsTermNotLitGenreText - 4309; 5772; 12429; 8808; 2584 11270 12641 2572; 4318 4109 2088 10642 2688 2449 10404; 4313 4309; 2382 2381 8560 9511 4309 4313; 4314 4313 4309 DO - http://dx.doi.org/10.1007/s11111-013-0201-0 ER - TY - JOUR T1 - Broadscale postseismic gravity change following the 2011 Tohoku-Oki earthquake and implication for deformation by viscoelastic relaxation and afterslip AN - 1696877610; 2015-068946 AB - The analysis of GRACE gravity data revealed postseismic gravity increase by 6 mu Gal over a 500 km scale within a couple of years after the 2011 Tohoku-Oki earthquake, which is nearly 40-50% of the coseismic gravity change. It originates mostly from changes in the isotropic component corresponding to the M (sub rr) moment tensor element. The exponential decay with rapid change in a year and gradual change afterward is a characteristic temporal pattern. Both viscoelastic relaxation and afterslip models produce reasonable agreement with the GRACE free-air gravity observation, while their Bouguer gravity patterns and seafloor vertical deformations are distinctly different. The postseismic gravity variation is best modeled by the biviscous relaxation with a transient and steady state viscosity of 10 (super 18) and 10 (super 19) Pa s, respectively, for the asthenosphere. Our calculated higher-resolution viscoelastic relaxation model, underlying the partially ruptured elastic lithosphere, yields the localized postseismic subsidence above the hypocenter reported from the GPS-acoustic seafloor surveying. Abstract Copyright (2014), The Authors. JF - Geophysical Research Letters AU - Han, Shin-Chan AU - Sauber, Jeanne AU - Pollitz, Fred Y1 - 2014/08/28/ PY - 2014 DA - 2014 Aug 28 SP - 5797 EP - 5805 PB - American Geophysical Union, Washington, DC VL - 41 IS - 16 SN - 0094-8276, 0094-8276 KW - Tohoku-Oki earthquake 2011 KW - Far East KW - geophysical surveys KW - geophysical methods KW - GRACE KW - relaxation KW - deformation KW - satellite methods KW - viscoelasticity KW - West Pacific KW - gravity methods KW - North Pacific KW - Pacific Ocean KW - surveys KW - Honshu KW - Northwest Pacific KW - Asia KW - earthquakes KW - Japan KW - 19:Seismology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877610?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Broadscale+postseismic+gravity+change+following+the+2011+Tohoku-Oki+earthquake+and+implication+for+deformation+by+viscoelastic+relaxation+and+afterslip&rft.au=Han%2C+Shin-Chan%3BSauber%2C+Jeanne%3BPollitz%2C+Fred&rft.aulast=Han&rft.aufirst=Shin-Chan&rft.date=2014-08-28&rft.volume=41&rft.issue=16&rft.spage=5797&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL060905 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 40 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2015-07-17 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - Asia; deformation; earthquakes; Far East; geophysical methods; geophysical surveys; GRACE; gravity methods; Honshu; Japan; North Pacific; Northwest Pacific; Pacific Ocean; relaxation; satellite methods; surveys; Tohoku-Oki earthquake 2011; viscoelasticity; West Pacific DO - http://dx.doi.org/10.1002/2014GL060905 ER - TY - JOUR T1 - GRAIL gravity constraints on the vertical and lateral density structure of the lunar crust AN - 1696877466; 2015-068943 AB - We analyzed data from the Gravity Recovery and Interior Laboratory (GRAIL) mission using a localized admittance approach to map out spatial variations in the vertical density structure of the lunar crust. Mare regions are characterized by a distinct decrease in density with depth, while the farside is characterized by an increase in density with depth at an average gradient of approximately 35 kg m (super -3) km (super -1) and typical surface porosities of at least 20%. The Apollo 12 and 14 landing site region has a similar density structure to the farside, permitting a comparison with seismic velocity profiles. The interior of the South Pole-Aitken (SP-A) impact basin appears distinct with a near-surface low-density (porous) layer 2-3 times thinner than the rest of the farside. This result suggests that redistribution of material during the large SP-A impact likely played a major role in sculpting the lunar crust. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Besserer, Jonathan AU - Nimmo, Francis AU - Wieczorek, Mark A AU - Weber, Renee C AU - Kiefer, Walter S AU - McGovern, Patrick J AU - Andrews-Hanna, Jeffrey C AU - Smith, David E AU - Zuber, Maria T Y1 - 2014/08/28/ PY - 2014 DA - 2014 Aug 28 SP - 5771 EP - 5777 PB - American Geophysical Union, Washington, DC VL - 41 IS - 16 SN - 0094-8276, 0094-8276 KW - gravity field KW - seismic profiles KW - geophysical surveys KW - density KW - Moon KW - lunar crust KW - geophysical methods KW - surveys KW - geophysical profiles KW - maria KW - seismic methods KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696877466?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=GRAIL+gravity+constraints+on+the+vertical+and+lateral+density+structure+of+the+lunar+crust&rft.au=Besserer%2C+Jonathan%3BNimmo%2C+Francis%3BWieczorek%2C+Mark+A%3BWeber%2C+Renee+C%3BKiefer%2C+Walter+S%3BMcGovern%2C+Patrick+J%3BAndrews-Hanna%2C+Jeffrey+C%3BSmith%2C+David+E%3BZuber%2C+Maria+T&rft.aulast=Besserer&rft.aufirst=Jonathan&rft.date=2014-08-28&rft.volume=41&rft.issue=16&rft.spage=5771&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL060240 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 - 2015-07-17 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - density; geophysical methods; geophysical profiles; geophysical surveys; gravity field; lunar crust; maria; Moon; seismic methods; seismic profiles; surveys DO - http://dx.doi.org/10.1002/2014GL060240 ER - TY - JOUR T1 - Groundwater depletion during drought threatens future water security of the Colorado River basin AN - 1696875738; 2015-068957 AB - Streamflow of the Colorado River Basin is the most overallocated in the world. Recent assessment indicates that demand for this renewable resource will soon outstrip supply, suggesting that limited groundwater reserves will play an increasingly important role in meeting future water needs. Here we analyze 9 years (December 2004 to November 2013) of observations from the NASA Gravity Recovery and Climate Experiment mission and find that during this period of sustained drought, groundwater accounted for 50.1 km (super 3) of the total 64.8 km (super 3) of freshwater loss. The rapid rate of depletion of groundwater storage (-5.6 + or - 0.4 km (super 3) yr (super -1) ) far exceeded the rate of depletion of Lake Powell and Lake Mead. Results indicate that groundwater may comprise a far greater fraction of Basin water use than previously recognized, in particular during drought, and that its disappearance may threaten the long-term ability to meet future allocations to the seven Basin states. Abstract Copyright (2014), The Authors. JF - Geophysical Research Letters AU - Castle, Stephanie L AU - Thomas, Brian F AU - Reager, John T AU - Rodell, Matthew AU - Swenson, Sean C AU - Famiglietti, James S Y1 - 2014/08/28/ PY - 2014 DA - 2014 Aug 28 SP - 5904 EP - 5911 PB - American Geophysical Union, Washington, DC VL - 41 IS - 16 SN - 0094-8276, 0094-8276 KW - United States KW - hydrology KW - water supply KW - Colorado River basin KW - surface water KW - water management KW - Lake Powell KW - Southwestern U.S. KW - climate change KW - ground water KW - drought KW - streamflow KW - Lake Meade KW - climate effects KW - discharge KW - water resources KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875738?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Groundwater+depletion+during+drought+threatens+future+water+security+of+the+Colorado+River+basin&rft.au=Castle%2C+Stephanie+L%3BThomas%2C+Brian+F%3BReager%2C+John+T%3BRodell%2C+Matthew%3BSwenson%2C+Sean+C%3BFamiglietti%2C+James+S&rft.aulast=Castle&rft.aufirst=Stephanie&rft.date=2014-08-28&rft.volume=41&rft.issue=16&rft.spage=5904&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL061055 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 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-07-17 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - climate change; climate effects; Colorado River basin; discharge; drought; ground water; hydrology; Lake Meade; Lake Powell; Southwestern U.S.; streamflow; surface water; United States; water management; water resources; water supply DO - http://dx.doi.org/10.1002/2014GL061055 ER - TY - JOUR T1 - Accretion and evolution of approximately 2.5 Earth-mass planets with voluminous H/He envelopes AN - 1849300391; 2016-104822 AB - Formation of planets in the Neptune size range with low-mass, but voluminous, H (sub 2) /He gaseous envelopes is modeled by detailed numerical simulations according to the core-nucleated accretion scenario. Formation locations ranging from 0.5 to 4 AU from a star of 1 (Mass compared to the Sun symbol) are considered. The final planets have heavy-element cores of 2.2-2.5 (Mass compared to the Earth) and envelopes in the range 0.037-0.16 (Mass compared to the Earth). After the formation process, which lasts 2 Myr or less, the planets evolve at constant mass up to an age of several Gyr. For assumed equilibrium temperatures of 250, 500, and 1000 K, their calculated final radii are compared with those observed by the Kepler spacecraft. For the particular case of Kepler-11 f, we address the question whether it could have formed in situ or whether migration from a formation location farther out in the disk is required. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Bodenheimer, Peter AU - Lissauer, Jack J Y1 - 2014/08/20/ PY - 2014 DA - 2014 Aug 20 EP - Paper no. 103 PB - IOP Publishing for American Astronomical Society, Bristol VL - 791 IS - 2 SN - 0004-637X, 0004-637X KW - migration KW - accretion KW - numerical models KW - extrasolar planets KW - Kepler-11f extrasolar planet KW - simulation KW - iron KW - temperature KW - size KW - mass KW - planets KW - noble gases KW - mini-Neptunes KW - metals KW - ice KW - hydrogen KW - volume KW - helium KW - core KW - rocks KW - Kepler Mission KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849300391?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Astrophysical+Journal&rft.atitle=Accretion+and+evolution+of+approximately+2.5+Earth-mass+planets+with+voluminous+H%2FHe+envelopes&rft.au=Bodenheimer%2C+Peter%3BLissauer%2C+Jack+J&rft.aulast=Bodenheimer&rft.aufirst=Peter&rft.date=2014-08-20&rft.volume=791&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%2F791%2F2%2F103 L2 - http://iopscience.iop.org/0004-637X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 40 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - accretion; core; extrasolar planets; helium; hydrogen; ice; iron; Kepler Mission; Kepler-11f extrasolar planet; mass; metals; migration; mini-Neptunes; noble gases; numerical models; planets; rocks; simulation; size; temperature; volume DO - http://dx.doi.org/10.1088/0004-637X/791/2/103 ER - TY - JOUR T1 - Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent AN - 1623256540; 2014-089182 AB - Early Holocene summer warmth drove dramatic Greenland ice sheet (GIS) retreat. Subsequent insolation-driven cooling caused GIS margin readvance to late Holocene maxima, from which ice margins are now retreating. We use (super 10) Be surface exposure ages from four locations between 69.4 degrees N and 61.2 degrees N to date when in the early Holocene south to west GIS margins retreated to within these late Holocene maximum extents. We find that this occurred at 11.1 + or - 0.2 ka to 10.6 + or - 0.5 ka in south Greenland, significantly earlier than previous estimates, and 6.8 + or - 0.1 ka to 7.9 + or - 0.1 ka in southwest to west Greenland, consistent with existing (super 10) Be ages. At least in south Greenland, these (super 10) Be ages likely provide a minimum constraint for when on a multicentury timescale summer temperatures after the last deglaciation warmed above late Holocene temperatures in the early Holocene. Current south Greenland ice margin retreat suggests that south Greenland may have now warmed to or above earliest Holocene summer temperatures. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Carlson, Anders E AU - Winsor, Kelsey AU - Ullman, David J AU - Brook, Edward J AU - Rood, Dylan H AU - Axford, Yarrow AU - LeGrande, Allegra N AU - Anslow, Faron S AU - Sinclair, Gaylen Y1 - 2014/08/16/ PY - 2014 DA - 2014 Aug 16 SP - 5514 EP - 5521 PB - American Geophysical Union, Washington, DC VL - 41 IS - 15 SN - 0094-8276, 0094-8276 KW - Quaternary KW - glaciation KW - Arctic region KW - Greenland ice sheet KW - ice cover KW - paleoclimatology KW - Holocene KW - ice sheets KW - deglaciation KW - climate change KW - Cenozoic KW - Greenland KW - glacial geology KW - upper Holocene KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256540?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Earliest+Holocene+south+Greenland+ice+sheet+retreat+within+its+late+Holocene+extent&rft.au=Carlson%2C+Anders+E%3BWinsor%2C+Kelsey%3BUllman%2C+David+J%3BBrook%2C+Edward+J%3BRood%2C+Dylan+H%3BAxford%2C+Yarrow%3BLeGrande%2C+Allegra+N%3BAnslow%2C+Faron+S%3BSinclair%2C+Gaylen&rft.aulast=Carlson&rft.aufirst=Anders&rft.date=2014-08-16&rft.volume=41&rft.issue=15&rft.spage=5514&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL060800 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2014-11-13 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - Arctic region; Cenozoic; climate change; deglaciation; glacial geology; glaciation; Greenland; Greenland ice sheet; Holocene; ice cover; ice sheets; paleoclimatology; Quaternary; upper Holocene DO - http://dx.doi.org/10.1002/2014GL060800 ER - TY - JOUR T1 - Evidence for interstellar origin of seven dust particles collected by the Stardust spacecraft AN - 1618133384; 2014-086853 AB - Seven particles captured by the Stardust Interstellar Dust Collector and returned to Earth for laboratory analysis have features consistent with an origin in the contemporary interstellar dust stream. More than 50 spacecraft debris particles were also identified. The interstellar dust candidates are readily distinguished from debris impacts on the basis of elemental composition and/or impact trajectory. The seven candidate interstellar particles are diverse in elemental composition, crystal structure, and size. The presence of crystalline grains and multiple iron-bearing phases, including sulfide, in some particles indicates that individual interstellar particles diverge from any one representative model of interstellar dust inferred from astronomical observations and theory. JF - Science AU - Westphal, Andrew J AU - Stroud, Rhonda M AU - Bechtel, Hans A AU - Brenker, Frank E AU - Butterworth, Anna L AU - Flynn, George J AU - Frank, David R AU - Gainsforth, Zack AU - Hillier, Jon K AU - Postberg, Frank AU - Simionovici, Alexandre S AU - Sterken, Veerle J AU - Nittler, Larry R AU - Allen, Carlton AU - Anderson, David AU - Ansari, Asna AU - Bajt, Sasa AU - Bastien, Ron K AU - Bassim, Nabil AU - Bridges, John AU - Brownlee, Donald E AU - Burchell, Mark AU - Burghammer, Manfred AU - Changela, Hitesh AU - Cloetens, Peter AU - Davis, Andrew M AU - Doll, Ryan AU - Floss, Christine AU - Gruen, Eberhard AU - Heck, Philipp R AU - Hoppe, Peter AU - Hudson, Bruce AU - Huth, Joachim AU - Kearsley, Anton AU - King, Ashley J AU - Lai, Barry AU - Leitner, Jan AU - Lemelle, Laurence AU - Leonard, Ariel AU - Leroux, Hugues AU - Lettieri, Robert AU - Marchant, William AU - Ogliore, Ryan AU - Ong, Wei Jia AU - Price, Mark C AU - Sandford, Scott A AU - Tresseras, Juan-Angel Sans AU - Schmitz, Sylvia AU - Schoonjans, Tom AU - Schreiber, Kate AU - Silversmit, Geert AU - Sole, Vicente A AU - Srama, Ralf AU - Stadermann, Frank AU - Stephan, Thomas AU - Stodolna, Julien AU - Sutton, Stephen AU - Trieloff, Mario AU - Tsou, Peter AU - Tyliszczak, Tolek AU - Vekemans, Bart AU - Vincze, Laszlo AU - von Korff, Joshua AU - Wordsworth, Naomi AU - Zevin, Daniel AU - Zolensky, Michael E Y1 - 2014/08/15/ PY - 2014 DA - 2014 Aug 15 SP - 786 EP - 791 PB - American Association for the Advancement of Science, Washington, DC VL - 345 IS - 6198 SN - 0036-8075, 0036-8075 KW - experimental studies KW - X-ray diffraction data KW - Stardust Mission KW - crystal structure KW - cosmochemistry KW - interplanetary dust KW - models KW - laboratory studies KW - physical properties KW - debris KW - cosmic dust KW - mineral composition KW - identification KW - X-ray fluorescence spectra KW - spectra KW - geochemistry KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618133384?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Evidence+for+interstellar+origin+of+seven+dust+particles+collected+by+the+Stardust+spacecraft&rft.au=Westphal%2C+Andrew+J%3BStroud%2C+Rhonda+M%3BBechtel%2C+Hans+A%3BBrenker%2C+Frank+E%3BButterworth%2C+Anna+L%3BFlynn%2C+George+J%3BFrank%2C+David+R%3BGainsforth%2C+Zack%3BHillier%2C+Jon+K%3BPostberg%2C+Frank%3BSimionovici%2C+Alexandre+S%3BSterken%2C+Veerle+J%3BNittler%2C+Larry+R%3BAllen%2C+Carlton%3BAnderson%2C+David%3BAnsari%2C+Asna%3BBajt%2C+Sasa%3BBastien%2C+Ron+K%3BBassim%2C+Nabil%3BBridges%2C+John%3BBrownlee%2C+Donald+E%3BBurchell%2C+Mark%3BBurghammer%2C+Manfred%3BChangela%2C+Hitesh%3BCloetens%2C+Peter%3BDavis%2C+Andrew+M%3BDoll%2C+Ryan%3BFloss%2C+Christine%3BGruen%2C+Eberhard%3BHeck%2C+Philipp+R%3BHoppe%2C+Peter%3BHudson%2C+Bruce%3BHuth%2C+Joachim%3BKearsley%2C+Anton%3BKing%2C+Ashley+J%3BLai%2C+Barry%3BLeitner%2C+Jan%3BLemelle%2C+Laurence%3BLeonard%2C+Ariel%3BLeroux%2C+Hugues%3BLettieri%2C+Robert%3BMarchant%2C+William%3BOgliore%2C+Ryan%3BOng%2C+Wei+Jia%3BPrice%2C+Mark+C%3BSandford%2C+Scott+A%3BTresseras%2C+Juan-Angel+Sans%3BSchmitz%2C+Sylvia%3BSchoonjans%2C+Tom%3BSchreiber%2C+Kate%3BSilversmit%2C+Geert%3BSole%2C+Vicente+A%3BSrama%2C+Ralf%3BStadermann%2C+Frank%3BStephan%2C+Thomas%3BStodolna%2C+Julien%3BSutton%2C+Stephen%3BTrieloff%2C+Mario%3BTsou%2C+Peter%3BTyliszczak%2C+Tolek%3BVekemans%2C+Bart%3BVincze%2C+Laszlo%3Bvon+Korff%2C+Joshua%3BWordsworth%2C+Naomi%3BZevin%2C+Daniel%3BZolensky%2C+Michael+E&rft.aulast=Westphal&rft.aufirst=Andrew&rft.date=2014-08-15&rft.volume=345&rft.issue=6198&rft.spage=786&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1252496 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 - 45 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-10-30 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - cosmic dust; cosmochemistry; crystal structure; debris; experimental studies; geochemistry; identification; interplanetary dust; laboratory studies; mineral composition; models; physical properties; spectra; Stardust Mission; X-ray diffraction data; X-ray fluorescence spectra DO - http://dx.doi.org/10.1126/science.1252496 ER - TY - JOUR T1 - Age dating of an extensive thrust system on Mercury; implications for the planet's thermal evolution AN - 1637536476; 2014-105122 AB - The tectonic evolution of Mercury is dominated at a global scale by contractional features such as lobate scarps that are widely distributed across the planet. These structures are thought to be the consequence of the secular cooling of Mercury. Therefore, dating these features is essential to place constraints on the timing of planetary cooling, which is important for understanding the thermal evolution of Mercury. In this work, we date an extended thrust system, which we term the Blossom Thrust System, located between 80 degrees E and 100 degrees E, and 30 degrees N and 15 degrees S, and which consists of several individual lobate scarps exhibiting a north-south orientation and a westward vergence. The age of the system was determined using several different methods. Traditional stratigraphic analysis was accompanied by crater counting of units that overlap the thrust system and by using the buffered crater-counting technique, allowing us to determine an absolute model age for the tectonic feature. These complementary methods give consistent results, implying that activity on the thrust ended between 3.5 and 3.7 Ga, depending on the adopted absolute-age model. These data provide an important insight into this portion of Mercury's crust, which may have implications for models of the thermal evolution of the planet as a whole. JF - Special Publication - Geological Society of London AU - Giacomini, Lorenza AU - Massironi, Matteo AU - Marchi, Simone AU - Fassett, C I AU - Di Achille, G AU - Cremonese, Gabriele Y1 - 2014/08/13/ PY - 2014 DA - 2014 Aug 13 SP - 291 EP - 311, 21 PB - Geological Society of London, London VL - 401 IS - 1 SN - 0305-8719, 0305-8719 KW - relative age KW - MESSENGER MDIS KW - statistical analysis KW - cosmochronology KW - Blossom Rupes KW - terranes KW - stress fields KW - deformation KW - thermal history KW - terrestrial planets KW - planets KW - contraction KW - craters KW - Mercury Planet KW - Blossom thrust system KW - surface features KW - Model Production Function KW - tectonics KW - scarps KW - Neukum Production Function KW - fold and thrust belts KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637536476?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+Geological+Society+of+London&rft.atitle=Age+dating+of+an+extensive+thrust+system+on+Mercury%3B+implications+for+the+planet%27s+thermal+evolution&rft.au=Giacomini%2C+Lorenza%3BMassironi%2C+Matteo%3BMarchi%2C+Simone%3BFassett%2C+C+I%3BDi+Achille%2C+G%3BCremonese%2C+Gabriele&rft.aulast=Giacomini&rft.aufirst=Lorenza&rft.date=2014-08-13&rft.volume=401&rft.issue=1&rft.spage=291&rft.isbn=&rft.btitle=&rft.title=Special+Publication+-+Geological+Society+of+London&rft.issn=03058719&rft_id=info:doi/10.1144%2FSP401.21 L2 - http://sp.lyellcollection.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 71 N1 - Document feature - illus. incl. block diags., 2 tables, geol. sketch map N1 - SuppNotes - Online First N1 - Last updated - 2015-02-19 N1 - CODEN - GSLSBW N1 - SubjectsTermNotLitGenreText - Blossom Rupes; Blossom thrust system; contraction; cosmochronology; craters; deformation; fold and thrust belts; Mercury Planet; MESSENGER MDIS; Model Production Function; Neukum Production Function; planets; relative age; scarps; statistical analysis; stress fields; surface features; tectonics; terranes; terrestrial planets; thermal history DO - http://dx.doi.org/10.1144/SP401.21 ER - TY - CPAPER T1 - Natures's Notebook provides phenology observations for NASA Juniper Phenology and Pollen Transport Project T2 - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AN - 1645180266; 6319780 JF - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AU - Luvall, Jeffrey AU - Crimmins, Theresa AU - Sprigg, William AU - Levetin, Estelle AU - Huete, Alfredo AU - Nickovic, Slobodan AU - Prasad, A AU - Vukovic, Ana AU - Van de Water, Peter AU - Budge, Amy AU - Hudspeth, William AU - Bunderson, Landon AU - Geter, Kenneth Y1 - 2014/08/10/ PY - 2014 DA - 2014 Aug 10 KW - Phenology KW - Pollen UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645180266?accountid=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=Natures%27s+Notebook+provides+phenology+observations+for+NASA+Juniper+Phenology+and+Pollen+Transport+Project&rft.au=Luvall%2C+Jeffrey%3BCrimmins%2C+Theresa%3BSprigg%2C+William%3BLevetin%2C+Estelle%3BHuete%2C+Alfredo%3BNickovic%2C+Slobodan%3BPrasad%2C+A%3BVukovic%2C+Ana%3BVan+de+Water%2C+Peter%3BBudge%2C+Amy%3BHudspeth%2C+William%3BBunderson%2C+Landon%3BGeter%2C+Kenneth&rft.aulast=Luvall&rft.aufirst=Jeffrey&rft.date=2014-08-10&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=99th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://eco.confex.com/eco/2014/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Implementing a decision support system for the Sierra Nevada to monitor, report, and forecast ecological conditions T2 - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AN - 1645179347; 6319749 JF - 99th Annual Meeting of the Ecological Society of America (ESA 2014) AU - Nguyen, Andrew Y1 - 2014/08/10/ PY - 2014 DA - 2014 Aug 10 KW - Artificial intelligence KW - Decision support systems UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645179347?accountid=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=Implementing+a+decision+support+system+for+the+Sierra+Nevada+to+monitor%2C+report%2C+and+forecast+ecological+conditions&rft.au=Nguyen%2C+Andrew&rft.aulast=Nguyen&rft.aufirst=Andrew&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 - A spatially coherent global soil moisture product with improved temporal resolution AN - 1560083105; 2014-069223 AB - Global soil moisture products that are completely independent of any type of ancillary data and solely rely on satellite observations are presented. Additionally, we further develop an existing downscaling technique that enhances the spatial resolution of such products to approximately 11 km. These products are based on internal modules of the Land Parameter Retrieval Model (LPRM), an algorithm that uses the radiative transfer equation to link soil moisture, vegetation optical depth and land surface temperature to observed brightness temperatures. The soil moisture product that is independent of any type of ancillary data uses the internally calculated dielectric constant as a soil moisture proxy. This data product is not influenced by errors associated with coarse-scale global soil property maps or by any other type of forcing (e.g. re-analysis) data and is therefore solely based on satellite microwave observations. The second step builds upon recent developments to increase the spatial resolution of the LPRM retrievals using a smoothing filter downscaling method. With this method we can attain a spatial resolution that can be more useful at the scale of local and regional hydrological studies as well. The steps presented in this paper were applied to observations from the Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E). The newly derived data sets were validated using ground-based observations from the International Soil Moisture Network (ISMN). The internally calculated dielectric constant product results in significantly more days with valid retrievals than the original soil moisture data products, in particular over arid regions. The dielectric constant product resulted in similar correlations with in situ data as the original soil moisture data product. Together, these findings demonstrate the usefulness of this new dielectric constant product for the hydrological modeling community and climate studies. A case study on the Australian Fitzroy catchment demonstrated that the downscaled data product has a more detailed spatial description of soil moisture, especially during wet and dry conditions with more pronounced dry and wet regions within the catchment. The increased resolution data products could therefore improve runoff predictions and this study demonstrated the potential added value of a transitioning from a spatial resolution of 56 km toward a higher resolution of 11 km. The hydrological implications of these newly developed data records are not only linked to AMSR-E satellite data, but also to the next generation Soil Moisture Active and Passive (SMAP) mission where a 9 km spatial resolution is the target resolution for satellite soil moisture products. The new data products will not replace the current LPRM products, but will be added to the existing array of data products and will become publicly available through our data portals. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Hydrology AU - de Jeu, Richard A M AU - Holmes, Thomas R H AU - Parinussa, Robert M AU - Owe, Manfred Y1 - 2014/08/04/ PY - 2014 DA - 2014 Aug 04 SP - 284 EP - 296 PB - Elsevier, Amsterdam VL - 516 SN - 0022-1694, 0022-1694 KW - passive methods KW - International Soil Moisture Network KW - moisture KW - Advanced Microwave Scanning Radiometer-Earth Observing System KW - vegetation KW - temperature KW - ground water KW - microwave methods KW - Lake Maraboon KW - brightness KW - spatial distribution KW - radiometers KW - Queensland Australia KW - drainage basins KW - Australia KW - algorithms KW - soils KW - Fitzroy Basin KW - Australasia KW - Land Parameter Retrieval Model KW - global KW - equations KW - satellite methods KW - dielectric constant KW - models KW - mathematical methods KW - temporal distribution KW - remote sensing KW - 21:Hydrogeology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560083105?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+spatially+coherent+global+soil+moisture+product+with+improved+temporal+resolution&rft.au=de+Jeu%2C+Richard+A+M%3BHolmes%2C+Thomas+R+H%3BParinussa%2C+Robert+M%3BOwe%2C+Manfred&rft.aulast=de+Jeu&rft.aufirst=Richard+A&rft.date=2014-08-04&rft.volume=516&rft.issue=&rft.spage=284&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2014.02.015 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 - 74 N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - Last updated - 2014-11-13 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - Advanced Microwave Scanning Radiometer-Earth Observing System; algorithms; Australasia; Australia; brightness; dielectric constant; drainage basins; equations; Fitzroy Basin; global; ground water; International Soil Moisture Network; Lake Maraboon; Land Parameter Retrieval Model; mathematical methods; microwave methods; models; moisture; passive methods; Queensland Australia; radiometers; remote sensing; satellite methods; soils; spatial distribution; temperature; temporal distribution; vegetation DO - http://dx.doi.org/10.1016/j.jhydrol.2014.02.015 ER - TY - JOUR T1 - Polygonal ground in the McMurdo dry valleys of Antarctica and its relationship to ice-table depth and the recent Antarctic climate history AN - 1756505154; 2016-006828 AB - The occurrence of dry permafrost overlying ice-rich permafrost is unique to the Antarctic Dry Valleys on Earth and to the high latitudes of Mars. The stability and distribution of this ice are poorly understood and fundamental to understanding the Antarctic climate as far back as a few million years. Polygonal patterned ground is nearly ubiquitous in these regions and is integrally linked to the history of the icy permafrost and climate. We examined the morphology of polygonal ground in Beacon Valley and the Beacon Heights region of the Antarctic Dry Valleys, and show that polygon size is correlated with ice-table depth (the boundary between dry and ice-rich permafrost). A numerical model of seasonal stress in permafrost shows that the ice-table depth is a dominant factor. Remote sensing and field observations of polygon size are therefore important tools for investigating subsurface ice. Polygons are long-lived landforms and observed characteristics indicate no major fluctuations in the ice-table depth during their development. We conclude that the Beacon Valley and Beacon Heights polygons have developed for at least 10 (super 4) years to achieve their present mature-stage morphology and that the ice-table depth has been stable for a similar length of time. JF - Antarctic Science AU - Mellon, Michael T AU - McKay, Christopher P AU - Heldmann, Jennifer L Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 413 EP - 426 PB - Cambridge University Press, Cambridge VL - 26 IS - 4 SN - 0954-1020, 0954-1020 KW - Beacon Heights KW - permafrost KW - Quaternary KW - numerical models KW - periglacial features KW - paleoclimatology KW - ice sheets KW - depth KW - size KW - Cenozoic KW - Antarctica KW - ice table KW - McMurdo dry valleys KW - Victoria Land KW - glacial geology KW - geomorphology KW - polygons KW - Beacon Valley KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756505154?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Antarctic+Science&rft.atitle=Polygonal+ground+in+the+McMurdo+dry+valleys+of+Antarctica+and+its+relationship+to+ice-table+depth+and+the+recent+Antarctic+climate+history&rft.au=Mellon%2C+Michael+T%3BMcKay%2C+Christopher+P%3BHeldmann%2C+Jennifer+L&rft.aulast=Mellon&rft.aufirst=Michael&rft.date=2014-08-01&rft.volume=26&rft.issue=4&rft.spage=413&rft.isbn=&rft.btitle=&rft.title=Antarctic+Science&rft.issn=09541020&rft_id=info:doi/10.1017%2FS0954102013000710 L2 - http://journals.cambridge.org/bin/bladerunner?30REQEVENT=&REQAUTH=0&500002REQSUB=&REQSTR1=AntarcticScience LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by Institute of Geological and Nuclear Sciences Limited (GNS Science), Lower Hutt, New Zealand N1 - Date revised - 2016-01-01 N1 - Number of references - 44 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-01-14 N1 - SubjectsTermNotLitGenreText - Antarctica; Beacon Heights; Beacon Valley; Cenozoic; depth; geomorphology; glacial geology; ice sheets; ice table; McMurdo dry valleys; numerical models; paleoclimatology; periglacial features; permafrost; polygons; Quaternary; size; Victoria Land DO - http://dx.doi.org/10.1017/S0954102013000710 ER - TY - JOUR T1 - Interdecadal changes in snow depth on Arctic sea ice AN - 1637542441; 2014-104838 AB - Snow plays a key role in the growth and decay of Arctic sea ice. In winter, it insulates sea ice from cold air temperatures, slowing sea ice growth. From spring to summer, the albedo of snow determines how much insolation is absorbed by the sea ice and underlying ocean, impacting ice melt processes. Knowledge of the contemporary snow depth distribution is essential for estimating sea ice thickness and volume, and for understanding and modeling sea ice thermodynamics in the changing Arctic. This study assesses spring snow depth distribution on Arctic sea ice using airborne radar observations from Operation IceBridge for 2009-2013. Data were validated using coordinated in situ measurements taken in March 2012 during the Bromine, Ozone, and Mercury Experiment (BROMEX) field campaign. We find a correlation of 0.59 and root-mean-square error of 5.8 cm between the airborne and in situ data. Using this relationship and IceBridge snow thickness products, we compared the recent results with data from the 1937, 1954-1991 Soviet drifting ice stations. The comparison shows thinning of the snowpack, from 35.1 + or - 9.4 to 22.2 + or - 1.9 cm in the western Arctic, and from 32.8 + or - 9.4 to 14.5 + or - 1.9 cm in the Beaufort and Chukchi seas. These changes suggest a snow depth decline of 37 + or - 29% in the western Arctic and 56 + or - 33% in the Beaufort and Chukchi seas. Thinning is negatively correlated with the delayed onset of sea ice freezeup during autumn. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Webster, Melinda A AU - Rigor, Ignatius G AU - Nghiem, Son V AU - Kurtz, Nathan T AU - Farrell, Sinead L AU - Perovich (CRREL), Donald K AU - Sturm, Matthew Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 5395 EP - 5406 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 8 SN - 2169-9275, 2169-9275 KW - decadal variations KW - snow cover KW - Arctic region KW - sea ice KW - ice cover KW - salinity KW - climate change KW - temperature KW - spatial distribution KW - ice KW - snow KW - climate effects KW - thickness KW - Arctic Ocean KW - seasonal variations KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542441?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Interdecadal+changes+in+snow+depth+on+Arctic+sea+ice&rft.au=Webster%2C+Melinda+A%3BRigor%2C+Ignatius+G%3BNghiem%2C+Son+V%3BKurtz%2C+Nathan+T%3BFarrell%2C+Sinead+L%3BPerovich+%28CRREL%29%2C+Donald+K%3BSturm%2C+Matthew&rft.aulast=Webster&rft.aufirst=Melinda&rft.date=2014-08-01&rft.volume=119&rft.issue=8&rft.spage=5395&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2014JC009985 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 - 40 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Arctic Ocean; Arctic region; climate change; climate effects; decadal variations; ice; ice cover; salinity; sea ice; seasonal variations; snow; snow cover; spatial distribution; temperature; thickness DO - http://dx.doi.org/10.1002/2014JC009985 ER - TY - JOUR T1 - Surface energy budget and thermal inertia at Gale Crater; calculations from ground-based measurements AN - 1629943827; 2014-094244 AB - The analysis of the surface energy budget (SEB) yields insights into soil-atmosphere interactions and local climates, while the analysis of the thermal inertia (I) of shallow subsurfaces provides context for evaluating geological features. Mars orbital data have been used to determine thermal inertias at horizontal scales of approximately 10 (super 4) m (super 2) to approximately 10 (super 7) m (super 2) . Here we use measurements of ground temperature and atmospheric variables by Curiosity to calculate thermal inertias at Gale Crater at horizontal scales of approximately 10 (super 2) m (super 2) . We analyze three sols representing distinct environmental conditions and soil properties, sol 82 at Rocknest (RCK), sol 112 at Point Lake (PL), and sol 139 at Yellowknife Bay (YKB). Our results indicate that the largest thermal inertia I = 452 J m (super -2) K (super -1) s (super -1/2) (SI units used throughout this article) is found at YKB followed by PL with I = 306 and RCK with I = 295. These values are consistent with the expected thermal inertias for the types of terrain imaged by Mastcam and with previous satellite estimations at Gale Crater. We also calculate the SEB using data from measurements by Curiosity's Rover Environmental Monitoring Station and dust opacity values derived from measurements by Mastcam. The knowledge of the SEB and thermal inertia has the potential to enhance our understanding of the climate, the geology, and the habitability of Mars. Abstract Copyright (2014), . The Authors. JF - Journal of Geophysical Research: Planets AU - Martinez, G M AU - Renno, N AU - Fischer, E AU - Borlina, C S AU - Hallet, B AU - Torre Juarez, M AU - Vasavada, A R AU - Ramos, M AU - Hamilton, V AU - Gomez-Elvira, J AU - Haberle, R M Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 1822 EP - 1838 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 8 SN - 2169-9097, 2169-9097 KW - heat flux KW - thermal inertia KW - impact features KW - numerical analysis KW - techniques KW - Mars KW - landing sites KW - measurement KW - Gale Crater KW - terrestrial planets KW - planets KW - Curiosity Rover KW - impact craters KW - surface energy budget KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943827?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Surface+energy+budget+and+thermal+inertia+at+Gale+Crater%3B+calculations+from+ground-based+measurements&rft.au=Martinez%2C+G+M%3BRenno%2C+N%3BFischer%2C+E%3BBorlina%2C+C+S%3BHallet%2C+B%3BTorre+Juarez%2C+M%3BVasavada%2C+A+R%3BRamos%2C+M%3BHamilton%2C+V%3BGomez-Elvira%2C+J%3BHaberle%2C+R+M&rft.aulast=Martinez&rft.aufirst=G&rft.date=2014-08-01&rft.volume=119&rft.issue=8&rft.spage=1822&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004618 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 - 50 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Curiosity Rover; Gale Crater; heat flux; impact craters; impact features; instruments; landing sites; Mars; measurement; numerical analysis; planets; surface energy budget; techniques; terrestrial planets; thermal inertia DO - http://dx.doi.org/10.1002/2014JE004618 ER - TY - JOUR T1 - Deep dielectric charging of regolith within the Moon's permanently shadowed regions AN - 1629943718; 2014-094243 AB - Energetic charged particles, such as galactic cosmic rays (GCRs) and solar energetic particles (SEPs), can penetrate deep within the lunar surface, resulting in deep dielectric charging. This charging process depends on the GCR and SEP currents, as well as on the regolith's electrical conductivity and permittivity. In permanently shadowed regions (PSRs) near the lunar poles, the discharging timescales are on the order of a lunation ( approximately 20 days). We present the first predictions for deep dielectric charging of lunar regolith. To estimate the resulting subsurface electric fields, we develop a data-driven, one-dimensional, time-dependent model. For model inputs, we use GCR data from the Cosmic Ray Telescope for the Effects of Radiation on board the Lunar Reconnaissance Orbiter and SEP data from the Electron, Proton, and Alpha Monitor on the Advanced Composition Explorer. We find that during the recent solar minimum, GCRs create persistent electric fields up to approximately 700 V/m. We also find that large SEP events create transient but strong electric fields (> or =10 (super 6) V/m) that may induce dielectric breakdown. Such breakdown would likely result in significant modifications to the physical and chemical properties of the lunar regolith within PSRs. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Jordan, A P AU - Stubbs, T J AU - Wilson, J K AU - Schwadron, N A AU - Spence, H E AU - Joyce, C J Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 1806 EP - 1821 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 8 SN - 2169-9097, 2169-9097 KW - electrical properties KW - electrical conductivity KW - Moon KW - Lunar Reconnaissance Orbiter KW - dielectric properties KW - solar wind KW - Advanced Composition Explorer KW - cosmic rays KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943718?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Deep+dielectric+charging+of+regolith+within+the+Moon%27s+permanently+shadowed+regions&rft.au=Jordan%2C+A+P%3BStubbs%2C+T+J%3BWilson%2C+J+K%3BSchwadron%2C+N+A%3BSpence%2C+H+E%3BJoyce%2C+C+J&rft.aulast=Jordan&rft.aufirst=A&rft.date=2014-08-01&rft.volume=119&rft.issue=8&rft.spage=1806&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004648 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 66 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Advanced Composition Explorer; cosmic rays; dielectric properties; electrical conductivity; electrical properties; Lunar Reconnaissance Orbiter; Moon; regolith; solar wind DO - http://dx.doi.org/10.1002/2014JE004648 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 - A multiparameter aerosol classification method and its application to retrievals from spaceborne polarimetry AN - 1566838546; 20720395 AB - Classifying observed aerosols into types (e.g., urban-industrial, biomass burning, mineral dust, maritime) helps to understand aerosol sources, transformations, effects, and feedback mechanisms; to improve accuracy of satellite retrievals; and to quantify aerosol radiative impacts on climate. The number of aerosol parameters retrieved from spaceborne sensors has been growing, from the initial aerosol optical depth (AOD) at one or a few wavelengths to a list that now includes AOD, complex refractive index, single scattering albedo (SSA), and depolarization of backscatter, each at several wavelengths, plus several particle size and shape parameters. Making optimal use of these varied data products requires objective, multidimensional analysis methods. We describe such a method, which makes explicit use of uncertainties in input parameters. It treats an N-parameter retrieved data point and its N-dimensional uncertainty as an extended data point, E. It then uses a modified Mahalanobis distance, D sub(EC), to assign an observation to the class (cluster) C that has minimum D sub(EC) from the point. We use parameters retrieved from the Aerosol Robotic Network (AERONET) to define seven prespecified clusters (pure dust, polluted dust, urban-industrial/developed economy, urban-industrial/developing economy, dark biomass smoke, light biomass smoke, and pure marine), and we demonstrate application of the method to a 5 year record of retrievals from the spaceborne Polarization and Directionality of the Earth's Reflectances 3 (POLDER 3) polarimeter over the island of Crete, Greece. Results show changes of aerosol type at this location in the eastern Mediterranean Sea, which is influenced by a wide variety of aerosol sources. Key Points * The method uses specified classes based on AERONET-retrieved parameters * POLDER aerosol data are assigned to classes using Mahalanobis classification * Aerosol types identified at Crete include dust, marine, urban, and smoke JF - Journal of Geophysical Research: Atmospheres AU - Russell, Philip B AU - Kacenelenbogen, Meloee AU - Livingston, John M AU - Hasekamp, Otto P AU - Burton, Sharon P AU - Schuster, Gregory L AU - Johnson, Matthew S AU - Knobelspiesse, Kirk D AU - Redemann, Jens AU - Ramachandran, S AU - Holben, Brent AD - NASA Ames Research Center, Moffett Field, California, USA. Y1 - 2014/08// PY - 2014 DA - Aug 2014 SP - 9838 EP - 9863 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 16 SN - 2169-897X, 2169-897X KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - Polarimeters KW - Sensors KW - Combustion products KW - Dust KW - Optical analysis KW - Classification KW - Economics KW - Refractive index KW - MED, Eastern Mediterranean KW - Urban areas KW - Aerosol Robotic Network (AERONET) KW - Aerosols KW - Albedo KW - Biomass KW - Polarization KW - Satellites KW - Smoke KW - Greece, Kriti KW - Optical depth of aerosols KW - Burning KW - POLDER (Polarization and Directionality of Earth's Reflectance) KW - M2 551.510.42:Air Pollution (551.510.42) KW - P 0000:AIR POLLUTION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566838546?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Atmospheres&rft.atitle=A+multiparameter+aerosol+classification+method+and+its+application+to+retrievals+from+spaceborne+polarimetry&rft.au=Russell%2C+Philip+B%3BKacenelenbogen%2C+Meloee%3BLivingston%2C+John+M%3BHasekamp%2C+Otto+P%3BBurton%2C+Sharon+P%3BSchuster%2C+Gregory+L%3BJohnson%2C+Matthew+S%3BKnobelspiesse%2C+Kirk+D%3BRedemann%2C+Jens%3BRamachandran%2C+S%3BHolben%2C+Brent&rft.aulast=Russell&rft.aufirst=Philip&rft.date=2014-08-01&rft.volume=119&rft.issue=16&rft.spage=9838&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD021411 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Aerosol Robotic Network (AERONET); Smoke; Polarimeters; Albedo; Optical depth of aerosols; Polarization; POLDER (Polarization and Directionality of Earth's Reflectance); Refractive index; Aerosols; Sensors; Combustion products; Biomass; Satellites; Dust; Optical analysis; Classification; Economics; Burning; Urban areas; Greece, Kriti; MED, Eastern Mediterranean DO - http://dx.doi.org/10.1002/2013JD021411 ER - TY - JOUR T1 - Astronaut Medical Selection During the Shuttle Era: 1981-2011 AN - 1560107222; 20588629 AB - Introduction: U.S. astronauts undergo extensive job-related screening and medical examinations prior to selection in order to identify candidates optimally suited for careers in spaceflight. Screening medical standards evolved over many years and after extensive spaceflight experience. These standards assess health-related risks for each astronaut candidate, minimizing the potential for medical impact on future mission success. This document discusses the evolution of the Shuttle-era medical selection standards and the most common reasons for medical disqualification of applicants. Methods: Data for astronaut candidate finalists were compiled from medical records and NASA archives from the period of 1978 to 2004 and were retrospectively reviewed for medically disqualifying conditions. Results: During Shuttle selection cycles, a total of 372 applicants were disqualified due to 425 medical concerns. The most common disqualifying conditions included visual, cardiovascular, psychiatric, and behavioral disorders. During this time period, three major expert panel reviews resulted in refinements and alterations to selection standards for future cycles. Discussion: Shuttle-era screening, testing, and specialist evaluations evolved through periodic expert reviews, evidence-based medicine, and astronaut medical care experience. The Shuttle medical program contributed to the development and implementation of NASA and international standards, longitudinal data collection, improved medical care, and occupational surveillance models. The lessons learned from the Shuttle program serve as the basis for medical selection for the ISS, exploration-class missions, and for those expected to participate in commercial spaceflight. JF - Aviation, Space, and Environmental Medicine AU - Johnston, Smith L AU - Blue, Rebecca S AU - Jennings, Richard T AU - Tarver, William J AU - Gray, Gary W AD - National Aeronautics and Space Administration, Houston, TX, rsblue@utmb.edu Y1 - 2014/08// PY - 2014 DA - Aug 2014 SP - 823 EP - 827 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 8 SN - 0095-6562, 0095-6562 KW - Risk Abstracts; Health & Safety Science Abstracts KW - spaceflight KW - medical standards KW - crewmembers KW - medical screening KW - Risk assessment KW - Data collection KW - Reviews KW - Careers KW - International standardization KW - R2 23060:Medical and environmental health KW - H 1000:Occupational Safety and Health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560107222?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Astronaut+Medical+Selection+During+the+Shuttle+Era%3A+1981-2011&rft.au=Johnston%2C+Smith+L%3BBlue%2C+Rebecca+S%3BJennings%2C+Richard+T%3BTarver%2C+William+J%3BGray%2C+Gary+W&rft.aulast=Johnston&rft.aufirst=Smith&rft.date=2014-08-01&rft.volume=85&rft.issue=8&rft.spage=823&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3968.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 11 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Risk assessment; Data collection; Reviews; Careers; International standardization DO - http://dx.doi.org/10.3357/ASEM.3968.2014 ER - TY - JOUR T1 - Flight Attendant Radiation Dose from Solar Particle Events AN - 1560106981; 20588630 AB - Introduction: Research has suggested that work as a flight attendant may be related to increased risk for reproductive health effects. Air cabin exposures that may influence reproductive health include radiation dose from galactic cosmic radiation and solar particle events. This paper describes the assessment of radiation dose accrued during solar particle events as part of a reproductive health study of flight attendants. Methods: Solar storm data were obtained from the National Oceanic and Atmospheric Administration Space Weather Prediction Center list of solar proton events affecting the Earth environment to ascertain storms relevant to the two study periods (1992-1996 and 1999-2001). Radiation dose from exposure to solar energetic particles was estimated using the NAIRAS model in conjunction with galactic cosmic radiation dose calculated using the CARI-6P computer program. Results: Seven solar particle events were determined to have potential for significant radiation exposure, two in the first study period and five in the second study period, and over-lapped with 24,807 flight segments. Absorbed (and effective) flight segment doses averaged 6.5 mu Gy (18 mu Sv) and 3.1 mu Gy (8.3 mu Sv) for the first and second study periods, respectively. Maximum doses were as high as 440 mu Gy (1.2 mSv) and 20 flight segments had doses greater than 190 mu Gy (0.5 mSv). Discussion: During solar particle events, a pregnant flight attendant could potentially exceed the equivalent dose limit to the conceptus of 0.5 mSv in a month recommended by the National Council on Radiation Protection and Measurements. JF - Aviation, Space, and Environmental Medicine AU - Anderson, Jeri L AU - Mertens, Christopher J AU - Grajewski, Barbara AU - Luo, Lian AU - Tseng, Chih-yu AU - Cassinelli, Rick T, II AD - Langley Research Center, National Aeronautics and Space Administration, Hampton, VA; National Institute for Occupational Safety and Health, 4676 Columbia Pkwy, MS R-14, Cincinnati, OH 45226, JLAnderson@cdc.gov Y1 - 2014/08// PY - 2014 DA - Aug 2014 SP - 828 EP - 832 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 8 SN - 0095-6562, 0095-6562 KW - Health & Safety Science Abstracts; Risk Abstracts KW - absorbed dose KW - effective dose KW - conceptus KW - reproductive health KW - Prediction KW - Risk assessment KW - Weather KW - Computer programs KW - Radiation KW - Cosmic radiation KW - Reproduction KW - Particulates KW - Storms KW - Councils KW - Pregnancy KW - R2 23020:Technological risks KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560106981?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Flight+Attendant+Radiation+Dose+from+Solar+Particle+Events&rft.au=Anderson%2C+Jeri+L%3BMertens%2C+Christopher+J%3BGrajewski%2C+Barbara%3BLuo%2C+Lian%3BTseng%2C+Chih-yu%3BCassinelli%2C+Rick+T%2C+II&rft.aulast=Anderson&rft.aufirst=Jeri&rft.date=2014-08-01&rft.volume=85&rft.issue=8&rft.spage=828&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3989.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 22 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Risk assessment; Prediction; Computer programs; Weather; Radiation; Cosmic radiation; Reproduction; Particulates; Councils; Storms; Pregnancy DO - http://dx.doi.org/10.3357/ASEM.3989.2014 ER - TY - JOUR T1 - The flux of kilogram-sized meteoroids from lunar impact monitoring AN - 1560086475; 2014-066256 AB - The flashes from meteoroid impacts on the Moon are useful in determining the flux of impactors with masses as low as a few tens of grams. A routine monitoring program at NASA's Marshall Space Flight Center has recorded over 300 impacts since 2006. A selection of 126 flashes recorded during periods of photometric skies was analyzed, creating the largest and most homogeneous dataset of lunar impact flashes to date. Standard CCD photometric techniques were applied to the video and the luminous energy, kinetic energy, and mass are estimated for each impactor. Shower associations were determined for most of the impactors and a range of luminous efficiencies was considered. The flux to a limiting energy of 2.5 X 10 (super -) 6 kT TNT or 1.05 X 10 (super 7) J is 1.03 X 10 (super -7) km (super -2) h (super -1) and the flux to a limiting mass of 30 g is 6.14 X 10 (super -10) m (super -2) yr (super -1) at the Moon. Comparisons made with measurements and models of the meteoroid population indicate that the flux of objects in this size range is slightly lower (but within the error bars) than flux at this size from the power law distribution determined for the near Earth object and fireball population by Brown et al. (Brown, P.G., Spalding, R., ReVelle, D., Tagliaferri, E., Worden, S. [2002]. Nature 420, 294-296). Size estimates for the crater detected by Lunar Reconnaissance Orbiter from a large impact observed on March 17, 2013 are also briefly discussed. JF - Icarus AU - Suggs, R M AU - Moser, D E AU - Cooke, W J AU - Suggs, R J Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 23 EP - 36 PB - Elsevier, New York, NY VL - 238 SN - 0019-1035, 0019-1035 KW - cratering KW - monitoring KW - power law KW - Moon KW - video methods KW - rates KW - meteorite flux KW - calibration KW - meteoroids KW - impacts KW - lunar craters KW - mass KW - photometry KW - meteor showers KW - impact flashes KW - uncertainty KW - energy KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560086475?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+flux+of+kilogram-sized+meteoroids+from+lunar+impact+monitoring&rft.au=Suggs%2C+R+M%3BMoser%2C+D+E%3BCooke%2C+W+J%3BSuggs%2C+R+J&rft.aulast=Suggs&rft.aufirst=R&rft.date=2014-08-01&rft.volume=238&rft.issue=&rft.spage=23&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.04.032 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 63 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-09-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - calibration; cratering; energy; impact flashes; impacts; lunar craters; mass; meteor showers; meteorite flux; meteoroids; monitoring; Moon; photometry; power law; rates; uncertainty; video methods DO - http://dx.doi.org/10.1016/j.icarus.2014.04.032 ER - TY - JOUR T1 - Two numerical models designed to reproduce Saturn ring temperatures as measured by Cassini-CIRS AN - 1560086400; 2014-066267 AB - We present two numerical models designed to reproduce the temperatures of the illuminated Saturn rings as measured by the CASSINI-CIRS instrument. Our models are constrained by all available temperature measurements performed on the illuminated rings since SOI. Both models reproduce well the variations of temperature under any illumination and observation geometry. One model is derived from a purely numerical data mining approach, relying on the implementation of a Neural Network that treats the data set globally. This model is used as a test of coverage completeness of the observational parameter space, driving our ability to characterize the rings thermal response. The second (analytical) model is derived using simple physical considerations, by treating the rings as a surface rather than as a collection of individual particles, combined with an empirical anisotropy function to describe the temperature resulting from the Sun's and Saturn's heating. The thermal response of this ring-surface is parameterized by its Bond albedo and emissivity, thermal relaxation time and a set of geometrical parameters quantifying the anisotropy of the temperature measurements depending on azimuth and elevation of the observer with respect to the ring plane, as well as on the solar elevation. Both models provide formulae to predict the ring temperature, that will ease the benchmarking of future physical models against data. The physical model is applied to fit the temperature of tens of different radial slices, allowing us to constrain the combined emissivity and albedo, thermal relaxation time and anisotropy parameters of the ring slabs with the highest radial resolution achieved so far with CIRS. Using for the first time all observation geometries available for illuminated rings, we are confident that our values are as unbiased as possible against observation geometry. The thermal relaxation time appears to be short, a few tens of minutes, and independent of the radial distance across the whole ring. A study of the temperature anisotropy suggests inter-particle shadowing is important in the B ring and in the outer A ring regions. JF - Icarus AU - Altobelli, Nicolas AU - Lopez-Paz, David AU - Pilorz, S AU - Spilker, Linda J AU - Morishima, R AU - Brooks, S AU - Leyrat, C AU - Deau, E AU - Edgington, S AU - Flandes, A Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 205 EP - 220 PB - Elsevier, New York, NY VL - 238 SN - 0019-1035, 0019-1035 KW - albedo KW - numerical models KW - physical models KW - emissivity KW - temperature KW - infrared spectra KW - giant planets KW - geometry KW - Saturn KW - planets KW - planetary rings KW - Cassini-Huygens Mission KW - spectra KW - outer planets KW - neural networks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560086400?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Two+numerical+models+designed+to+reproduce+Saturn+ring+temperatures+as+measured+by+Cassini-CIRS&rft.au=Altobelli%2C+Nicolas%3BLopez-Paz%2C+David%3BPilorz%2C+S%3BSpilker%2C+Linda+J%3BMorishima%2C+R%3BBrooks%2C+S%3BLeyrat%2C+C%3BDeau%2C+E%3BEdgington%2C+S%3BFlandes%2C+A&rft.aulast=Altobelli&rft.aufirst=Nicolas&rft.date=2014-08-01&rft.volume=238&rft.issue=&rft.spage=205&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.04.031 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 33 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-09-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - albedo; Cassini-Huygens Mission; emissivity; geometry; giant planets; infrared spectra; neural networks; numerical models; outer planets; physical models; planetary rings; planets; Saturn; spectra; temperature DO - http://dx.doi.org/10.1016/j.icarus.2014.04.031 ER - TY - JOUR T1 - Grid-free 2D plasma simulations of the complex interaction between the solar wind and small, near-Earth asteroids AN - 1560085660; 2014-066261 AB - We present results from a new grid-free 2D plasma simulation code applied to a small, unmagnetized body immersed in the streaming solar wind plasma. The body was purposely modeled as an irregular shape in order to examine photoemission and solar wind plasma flow in high detail on the dayside, nightside, terminator and surface-depressed 'pocket' regions. Our objective is to examine the overall morphology of the various plasma interaction regions that form around a small body like a small near-Earth asteroid (NEA). We find that the object obstructs the solar wind flow and creates a trailing wake region downstream, which involves the interplay between surface charging and ambipolar plasma expansion. Photoemission is modeled as a steady outflow of electrons from illuminated portions of the surface, and under direct illumination the surface forms a non-monotonic or "double-sheath" electric potential upstream of the body, which is important for understanding trajectories and equilibria of lofted dust grains in the presence of a complex asteroid geometry. The largest electric fields are found at the terminators, where ambipolar plasma expansion in the body-sized nightside wake merges seamlessly with the thin photoelectric sheath on the dayside. The pocket regions are found to be especially complex, with nearby sunlit regions of positive potential electrically connected to unlit negative potentials and forming adjacent natural electric dipoles. For objects near the surface, we find electrical dissipation times (through collection of local environmental solar wind currents) that vary over at least 5 orders of magnitude: from 39 mu s inside the near-surface photoelectron cloud under direct sunlight to >>1 s inside the particle-depleted nightside wake and shadowed pocket regions. JF - Icarus AU - Zimmerman, Michael I AU - Farrell, W M AU - Poppe, A R Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 77 EP - 85 PB - Elsevier, New York, NY VL - 238 SN - 0019-1035, 0019-1035 KW - near-Earth objects KW - asteroids KW - near-Earth asteroids KW - clastic sediments KW - solar wind KW - electrical field KW - electrostatic properties KW - simulation KW - ions KW - two-dimensional models KW - topography KW - dust KW - sediments KW - photoelectric sheath KW - electrical currents KW - photoelectrons KW - electrons KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560085660?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Grid-free+2D+plasma+simulations+of+the+complex+interaction+between+the+solar+wind+and+small%2C+near-Earth+asteroids&rft.au=Zimmerman%2C+Michael+I%3BFarrell%2C+W+M%3BPoppe%2C+A+R&rft.aulast=Zimmerman&rft.aufirst=Michael&rft.date=2014-08-01&rft.volume=238&rft.issue=&rft.spage=77&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.02.029 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 41 N1 - PubXState - NY N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-09-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - asteroids; clastic sediments; dust; electrical currents; electrical field; electrons; electrostatic properties; ions; near-Earth asteroids; near-Earth objects; photoelectric sheath; photoelectrons; sediments; simulation; solar wind; topography; two-dimensional models DO - http://dx.doi.org/10.1016/j.icarus.2014.02.029 ER - TY - JOUR T1 - Seasonal variations in Mercury's dayside calcium exosphere AN - 1560085509; 2014-066258 AB - The Mercury Atmospheric and Surface Composition Spectrometer on the MESSENGER spacecraft has observed calcium emission in Mercury's exosphere on a near-daily basis since March 2011. During MESSENGER's primary and first extended missions (March 2011 - March 2013) the dayside calcium exosphere was measured over eight Mercury years. We have simulated these data with a Monte Carlo model of exospheric source processes to show that (a) there is a persistent source of energetic calcium located in the dawn equatorial region, (b) there is a seasonal dependence in the calcium source rate, and (c) there are no obvious year-to-year variations in the near-surface dayside calcium exosphere. JF - Icarus AU - Burger, Matthew H AU - Killen, Rosemary M AU - McClintock, William E AU - Merkel, Aimee W AU - Vervack, Ronald J, Jr AU - Cassidy, Timothy A AU - Sarantos, Menelaos Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 51 EP - 58 PB - Elsevier, New York, NY VL - 238 SN - 0019-1035, 0019-1035 KW - calcium KW - alkaline earth metals KW - equatorial region KW - Mercury Atmospheric and Surface Composition Spectrometer KW - Monte Carlo analysis KW - statistical analysis KW - atmosphere KW - exosphere KW - terrestrial planets KW - planets KW - metals KW - Mercury Planet KW - seasonal variations KW - MESSENGER Mission KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560085509?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Seasonal+variations+in+Mercury%27s+dayside+calcium+exosphere&rft.au=Burger%2C+Matthew+H%3BKillen%2C+Rosemary+M%3BMcClintock%2C+William+E%3BMerkel%2C+Aimee+W%3BVervack%2C+Ronald+J%2C+Jr%3BCassidy%2C+Timothy+A%3BSarantos%2C+Menelaos&rft.aulast=Burger&rft.aufirst=Matthew&rft.date=2014-08-01&rft.volume=238&rft.issue=&rft.spage=51&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.04.049 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 27 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-09-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; atmosphere; calcium; equatorial region; exosphere; Mercury Atmospheric and Surface Composition Spectrometer; Mercury Planet; MESSENGER Mission; metals; Monte Carlo analysis; planets; seasonal variations; statistical analysis; terrestrial planets DO - http://dx.doi.org/10.1016/j.icarus.2014.04.049 ER - TY - JOUR T1 - Age relationships of the Rembrandt Basin and Enterprise Rupes, Mercury AN - 1637529841; 2014-105123 AB - The Rembrandt basin is the largest well-preserved impact feature in the southern hemisphere of Mercury. Its smooth volcanic infill hosts wrinkle ridges and graben, and the entire basin is cross-cut by the Enterprise Rupes scarp system. On the basis of the Model Production Function crater chronology, our analysis shows that the formation of the Rembrandt basin occurred at 3.8+ or -0.1 Ga during the Late Heavy Bombardment, consistent with previous studies. We also find that the smooth plains interior to the basin were emplaced between 3.7 and 3.6+ or -0.1 Ga, indicative of a resurfacing event within the Rembrandt basin that is consistent with the presence of partially buried craters. These youngest plains appear temporally unrelated to basin formation, and so we regard their origin as likely to be due to volcanism. We identify the same chronological relationship for the terrain cross-cut by Enterprise Rupes to the west of the basin. Therefore, volcanic activity affected both the basin and its surroundings, but ended prior to the majority of basin- and regional-scale tectonic deformation. If Enterprise Rupes formed prior to the Rembrandt basin, then regional-scale tectonic activity along this structure might have lasted at least 200 myr. JF - Special Publication - Geological Society of London AU - Ferrari, Sabrina AU - Massironi, Matteo AU - Marchi, Simone AU - Byrne, Paul K AU - Klimczak, Christian AU - Martellato, Elena AU - Cremonese, Gabriele Y1 - 2014/07/29/ PY - 2014 DA - 2014 Jul 29 SP - 159 EP - 172, 14 PB - Geological Society of London, London VL - 401 IS - 1 SN - 0305-8719, 0305-8719 KW - relative age KW - MESSENGER MDIS KW - impact features KW - Caloris Basin KW - resurfacing KW - cosmochronology KW - terranes KW - equations KW - deformation KW - Enterprise Rupes KW - terrestrial planets KW - case studies KW - planets KW - Rembrandt Basin KW - craters KW - volcanism KW - Mercury Planet KW - surface features KW - Model Production Function KW - tectonics KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637529841?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+Geological+Society+of+London&rft.atitle=Age+relationships+of+the+Rembrandt+Basin+and+Enterprise+Rupes%2C+Mercury&rft.au=Ferrari%2C+Sabrina%3BMassironi%2C+Matteo%3BMarchi%2C+Simone%3BByrne%2C+Paul+K%3BKlimczak%2C+Christian%3BMartellato%2C+Elena%3BCremonese%2C+Gabriele&rft.aulast=Ferrari&rft.aufirst=Sabrina&rft.date=2014-07-29&rft.volume=401&rft.issue=1&rft.spage=159&rft.isbn=&rft.btitle=&rft.title=Special+Publication+-+Geological+Society+of+London&rft.issn=03058719&rft_id=info:doi/10.1144%2FSP401.20 L2 - http://sp.lyellcollection.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 65 N1 - Document feature - illus. incl. 1 table, geol. sketch maps N1 - SuppNotes - Online First N1 - Last updated - 2015-02-19 N1 - CODEN - GSLSBW N1 - SubjectsTermNotLitGenreText - Caloris Basin; case studies; cosmochronology; craters; deformation; Enterprise Rupes; equations; impact features; Mercury Planet; MESSENGER MDIS; Model Production Function; planets; relative age; Rembrandt Basin; resurfacing; surface features; tectonics; terranes; terrestrial planets; volcanism DO - http://dx.doi.org/10.1144/SP401.20 ER - TY - JOUR T1 - Effect of free-stream turbulence on boundary layer transition AN - 1555014792; 20322782 AB - This paper is concerned with the transition to turbulence in flat plate boundary layers due to moderately high levels of free-stream turbulence. The turbulence is assumed to be generated by an (idealized) grid and matched asymptotic expansions are used to analyse the resulting flow over a finite thickness flat plate located in the downstream region. The characteristic Reynolds number R lambda based on the mesh size lambda and free-stream velocity is assumed to be large, and the turbulence intensity epsilon is assumed to be small. The asymptotic flow structure is discussed for the generic case where the turbulence Reynolds number epsilon R lambda and the plate thickness and are held fixed (at O(1) and O( lambda ), respectively) in the limit as [Formula] and epsilon arrow right 0. But various limiting cases are considered in order to explain the relevant transition mechanisms. It is argued that there are two types of streak-like structures that can play a role in the transition process: (i) those that appear in the downstream region and are generated by streamwise vorticity in upstream flow and (ii) those that are concentrated near the leading edge and are generated by plate normal vorticity in upstream flow. The former are relatively unaffected by leading edge geometry and are usually referred to as Klebanoff modes while the latter are strongly affected by leading edge geometry and are more streamwise vortex-like in appearance. JF - Philosophical Transactions of the Royal Society of London, Series A: Mathematical, Physical and Engineering Sciences AU - Goldstein, ME AD - NASA Glenn Research Center, , 2100 Brookpark Road, Cleveland, 44135 OH, USA, marvin.e.goldstein@nasa.gov Y1 - 2014/07/28/ PY - 2014 DA - 2014 Jul 28 SP - 20130354 PB - Royal Society of London, 6 Carlton House Terrace London SW1Y 5AG United Kingdom VL - 372 IS - 2020 SN - 1364-503X, 1364-503X KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - boundary layer transition KW - free-stream turbulence KW - boundary layer streaks KW - Plate boundaries KW - Reynolds Number KW - Turbulence intensities KW - Boundary Layers KW - Velocity KW - Flow structures KW - turbulence KW - Expansion KW - Boundary layers KW - Vorticity KW - Downstream KW - Reynolds number KW - Structural Engineering KW - Turbulent boundary layer KW - Turbulence KW - Q2 09243:Structure, mechanics and thermodynamics KW - AQ 00006:Sewage KW - SW 0810:General KW - M2 551.511:Mechanics and Thermodynamics of the Atmosphere (551.511) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1555014792?accountid=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=Philosophical+Transactions+of+the+Royal+Society+of+London%2C+Series+A%3A+Mathematical%2C+Physical+and+Engineering+Sciences&rft.atitle=Effect+of+free-stream+turbulence+on+boundary+layer+transition&rft.au=Goldstein%2C+ME&rft.aulast=Goldstein&rft.aufirst=ME&rft.date=2014-07-28&rft.volume=372&rft.issue=2020&rft.spage=20130354&rft.isbn=&rft.btitle=&rft.title=Philosophical+Transactions+of+the+Royal+Society+of+London%2C+Series+A%3A+Mathematical%2C+Physical+and+Engineering+Sciences&rft.issn=1364503X&rft_id=info:doi/10.1098%2Frsta.2013.0354 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Plate boundaries; Boundary layers; Flow structures; Reynolds number; Turbulence; Turbulent boundary layer; Turbulence intensities; Vorticity; Reynolds Number; Boundary Layers; Velocity; Downstream; Expansion; Structural Engineering; turbulence DO - http://dx.doi.org/10.1098/rsta.2013.0354 ER - TY - CPAPER T1 - Large Plant Growth Chambers: Flying Soon on a Space Station Near You! T2 - 2014 Annual Conference of the American Society for Horticultural Science (ASHS 2014) AN - 1541353250; 6288769 JF - 2014 Annual Conference of the American Society for Horticultural Science (ASHS 2014) AU - Massa, Gioia AU - Morrow, Robert AU - Levine, Howard Y1 - 2014/07/28/ PY - 2014 DA - 2014 Jul 28 KW - Flying KW - Plant growth UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1541353250?accountid=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+Conference+of+the+American+Society+for+Horticultural+Science+%28ASHS+2014%29&rft.atitle=Large+Plant+Growth+Chambers%3A+Flying+Soon+on+a+Space+Station+Near+You%21&rft.au=Massa%2C+Gioia%3BMorrow%2C+Robert%3BLevine%2C+Howard&rft.aulast=Massa&rft.aufirst=Gioia&rft.date=2014-07-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Conference+of+the+American+Society+for+Horticultural+Science+%28ASHS+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://ashs.confex.com/ashs/2014/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-27 N1 - Last updated - 2014-06-30 ER - TY - JOUR T1 - The orbit of transneptunian binary Manwe and Thorondor and their upcoming mutual events AN - 1623282011; 2014-071552 AB - A new Hubble Space Telescope observation of the 7:4 resonant transneptunian binary system (385446) Manwe has shown that, of two previously reported solutions for the orbit of its satellite Thorondor, the prograde one is correct. The orbit has a period of 110.18 + or - 0.02 days, semimajor axis of 6670 + or - 40 km, and an eccentricity of 0.563 + or - 0.007. It will be viewable edge-on from the inner Solar System during 2015-2017, presenting opportunities to observe mutual occultation and eclipse events. However, the number of observable events will be small, owing to the long orbital period and expected small sizes of the bodies relative to their separation. This paper presents predictions for events observable from Earth-based telescopes and discusses the associated uncertainties and challenges. JF - Icarus AU - Grundy, W AU - Benecchi, S D AU - Porter, S B AU - Noll, K S Y1 - 2014/07/15/ PY - 2014 DA - 2014 Jul 15 SP - 1 EP - 8 PB - Elsevier, New York, NY VL - 237 SN - 0019-1035, 0019-1035 KW - Earth-based observations KW - telescope methods KW - eclipses KW - orbits KW - Kuiper Belt KW - trans-neptunian objects KW - prediction KW - Manwe Kuiper Belt object KW - observations KW - light curves KW - eccentricity KW - Thorondor Satellite KW - resonance KW - photometry KW - occultation KW - Hubble Space Telescope KW - satellites KW - binary systems KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623282011?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+orbit+of+transneptunian+binary+Manwe+and+Thorondor+and+their+upcoming+mutual+events&rft.au=Grundy%2C+W%3BBenecchi%2C+S+D%3BPorter%2C+S+B%3BNoll%2C+K+S&rft.aulast=Grundy&rft.aufirst=W&rft.date=2014-07-15&rft.volume=237&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.04.021 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 37 N1 - PubXState - NY N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - binary systems; Earth-based observations; eccentricity; eclipses; Hubble Space Telescope; Kuiper Belt; light curves; Manwe Kuiper Belt object; observations; occultation; orbits; photometry; prediction; resonance; satellites; telescope methods; Thorondor Satellite; trans-neptunian objects DO - http://dx.doi.org/10.1016/j.icarus.2014.04.021 ER - TY - JOUR T1 - High water contents in the Siberian cratonic mantle linked to metasomatism; an FTIR study of Udachnaya peridotite xenoliths AN - 1549617358; 2014-060420 AB - The processes that control water distribution in nominally anhydrous minerals from peridotites are twofold. Melt depletion will remove water while metasomatism can potentially add water to these minerals. These processes can lead to a wide range of outcomes in water contents, which in turn could play a role in mantle rheology and long-term cratonic root stability. To examine these complexities, water concentrations in minerals from well-characterized peridotites from the Udachnaya kimberlite in the central Siberian craton were analyzed by FTIR. The peridotites span a complete top to bottom cross-section of typical cratonic lithospheric mantle (2-7GPa and 700-1400 degrees C). Diffusion modeling of water content profiles across olivine grains shows that water loss during decompression is limited to the 100mu m rims of olivines; the cores preserved their mantle water contents. Water contents range from 6 to 323ppm wt H (sub 2) O in olivine, 28-301ppm H (sub 2) O in orthopyroxene (opx), 100-272ppm H (sub 2) O in clinopyroxene (cpx) and 0-23ppm H (sub 2) O in garnet. Melting modeling cannot reproduce the high water contents of cratonic mantle peridotites and any potential partial melting trend must have been erased by later events. The water contents of minerals, however, are correlated with modal abundances of clinopyroxene and garnet, bulk rock FeO, TiO (sub 2) and SiO (sub 2) as well as with light and middle rare earth elements in clinopyroxene and garnet. These relationships are best interpreted as interaction of residual, melt-depleted peridotites with silicate melt, which produced modal and cryptic metasomatism. Importantly, the water enrichment in the Siberian cratonic mantle took place prior to kimberlite magmatism and eruption. Water addition by metasomatism occurred from pressures >4GPa all the way to the base of the cratonic root below central Siberia, but was limited to shallower levels (<5GPa) in the Kaapvaal cratonic lithosphere. The difference in olivine water contents at the deepest levels of the Kaapvaal (<5ppm H (sub 2) O) and Siberian (6-323ppm H (sub 2) O) cratonic roots may be linked to oxygen fugacity and resulting fluid speciation or, alternatively, to reaction with different metasomatic agents. Calculated viscosities for the deepest Udachnaya samples are similar to those inferred for the asthenosphere. If these xenoliths are representative of the deep cratonic lithosphere, water is not as important a parameter as previously thought in the strength of cratonic lithosphere, otherwise the cratonic root beneath Udachnaya would have been delaminated. Alternatively, the metasomatic xenoliths may not be representative of the Siberian cratonic root and kimberlites preferentially sample cratonic mantle lithosphere material located near, and metasomatized by, melt conduits, which served as channels for upward migration of water-rich melts and fluids including kimberlites. In that case, the cratonic root overall still may have relatively low water contents, which in addition to its less metasomatized (more refractory) and thereby buoyant nature, still play a role in making it strong enough to resist delamination by the surrounding asthenosphere. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Doucet, Luc S AU - Peslier, Anne H AU - Ionov, Dmitri A AU - Brandon, Alan D AU - Golovin, Alexander V AU - Goncharov, Aleksey G AU - Ashchepkov, Igor V Y1 - 2014/07/15/ PY - 2014 DA - 2014 Jul 15 SP - 159 EP - 187 PB - Elsevier, New York, NY VL - 137 SN - 0016-7037, 0016-7037 KW - mineral exploration KW - igneous rocks KW - mantle KW - Russian Federation KW - metasomatism KW - infrared spectra KW - FTIR spectra KW - plutonic rocks KW - mineral composition KW - melting KW - Commonwealth of Independent States KW - water-rock interaction KW - phase equilibria KW - inclusions KW - Siberian Platform KW - water content KW - spectra KW - Asia KW - Udachnaya Pipe KW - xenoliths KW - P-T conditions KW - diamond deposits KW - textures KW - basement KW - Yakutia Russian Federation KW - pipes KW - cratons KW - ultramafics KW - models KW - intrusions KW - kimberlite KW - peridotites KW - crystal chemistry 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/1549617358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=High+water+contents+in+the+Siberian+cratonic+mantle+linked+to+metasomatism%3B+an+FTIR+study+of+Udachnaya+peridotite+xenoliths&rft.au=Doucet%2C+Luc+S%3BPeslier%2C+Anne+H%3BIonov%2C+Dmitri+A%3BBrandon%2C+Alan+D%3BGolovin%2C+Alexander+V%3BGoncharov%2C+Aleksey+G%3BAshchepkov%2C+Igor+V&rft.aulast=Doucet&rft.aufirst=Luc&rft.date=2014-07-15&rft.volume=137&rft.issue=&rft.spage=159&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.04.011 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 - 125 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-07-31 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - Asia; basement; Commonwealth of Independent States; cratons; crystal chemistry; diamond deposits; FTIR spectra; igneous rocks; inclusions; infrared spectra; intrusions; kimberlite; mantle; melting; metasomatism; mineral composition; mineral exploration; models; P-T conditions; peridotites; phase equilibria; pipes; plutonic rocks; Russian Federation; Siberian Platform; spectra; textures; Udachnaya Pipe; ultramafics; water content; water-rock interaction; xenoliths; Yakutia Russian Federation DO - http://dx.doi.org/10.1016/j.gca.2014.04.011 ER - TY - NEWS T1 - NASA to Launch Carbon Observatory AN - 1544770655 JF - UPI Space Daily AU - Dr. Tony Phillips for "http://science.nasa.gov/">NASA Science News Y1 - 2014/07/03/ PY - 2014 DA - 2014 Jul 03 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1544770655?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NASA+to+Launch+Carbon+Observatory&rft.au=Dr.+Tony+Phillips+for+%22http%3A%2F%2Fscience.nasa.gov%2F%22%26gt%3BNASA+Science+News&rft.aulast=Dr.+Tony+Phillips+for+%22http%3A%2F%2Fscience.nasa.gov%2F%22%26gt%3BNASA+Science+News&rft.aufirst=&rft.date=2014-07-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-07-14 ER - TY - JOUR T1 - Tidal heating in multilayered terrestrial exoplanets AN - 1849302615; 2016-104709 AB - The internal pattern and overall magnitude of tidal heating for spin-synchronous terrestrial exoplanets from 1 to 2.5 R (sub E) is investigated using a propagator matrix method for a variety of layer structures. Particular attention is paid to ice-silicate hybrid super-Earths, where a significant ice mantle is modeled to rest atop an iron-silicate core, and may or may not contain a liquid water ocean. We find multilayer modeling often increases tidal dissipation relative to a homogeneous model, across multiple orbital periods, due to the ability to include smaller volume low viscosity regions, and the added flexure allowed by liquid layers. Gradations in parameters with depth are explored, such as allowed by the Preliminary Earth Reference Model. For ice-silicate hybrid worlds, dramatically greater dissipation is possible beyond the case of a silicate mantle only, allowing non-negligible tidal activity to extend to greater orbital periods than previously predicted. Surface patterns of tidal heating are found to potentially be useful for distinguishing internal structure. The influence of ice mantle depth and water ocean size and position are shown for a range of forcing frequencies. Rates of orbital circularization are found to be 10-100 times faster than standard predictions for Earth-analog planets when interiors are moderately warmer than the modern Earth, as well as for a diverse range of ice-silicate hybrid super-Earths. Circularization rates are shown to be significantly longer for planets with layers equivalent to an ocean-free modern Earth, as well as for planets with high fractions of either ice or silicate melting. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Henning, Wade G AU - Hurford, Terry, Jr Y1 - 2014/07/01/ PY - 2014 DA - 2014 Jul 01 EP - Paper no. 30 PB - IOP Publishing for American Astronomical Society, Bristol VL - 789 IS - 1 SN - 0004-637X, 0004-637X KW - water KW - silicates KW - magma oceans KW - sea water KW - extrasolar planets KW - orbits KW - tidal heating KW - partial melting KW - mantle KW - terrestrial planets KW - super-Earths KW - models KW - planets KW - melting KW - viscosity KW - ice KW - planetary interiors KW - heating KW - periodicity KW - core KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849302615?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Astrophysical+Journal&rft.atitle=Tidal+heating+in+multilayered+terrestrial+exoplanets&rft.au=Henning%2C+Wade+G%3BHurford%2C+Terry%2C+Jr&rft.aulast=Henning&rft.aufirst=Wade&rft.date=2014-07-01&rft.volume=789&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F789%2F1%2F30 L2 - http://iopscience.iop.org/0004-637X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 214 N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - core; extrasolar planets; heating; ice; magma oceans; mantle; melting; models; orbits; partial melting; periodicity; planetary interiors; planets; sea water; silicates; super-Earths; terrestrial planets; tidal heating; viscosity; water DO - http://dx.doi.org/10.1088/0004-637X/789/1/30 ER - TY - JOUR T1 - Stratospheric ozone response to a solar irradiance reduction in a quadrupled CO sub(2) environment AN - 1712568897; PQ0001955319 AB - We used the Goddard Space Flight Center (GSFC) global two-dimensional (2D) atmospheric model to investigate the stratospheric ozone response to a proposed geoengineering activity wherein a reduced top-of-atmosphere (TOA) solar irradiance is imposed to help counteract a quadrupled CO sub(2) atmosphere. This study is similar to the Geoengineering Model Intercomparison Project (GeoMIP) Experiment G1. Three primary simulations were completed with the GSFC 2D model to examine this possibility: (A) a pre-industrial atmosphere with a boundary condition of 285 ppmv CO sub(2) ( piControl ); (B) a base future atmosphere with 1140 ppmv CO sub(2) ( abrupt4xCO2 ); and (C) a perturbed future atmosphere with 1140 ppmv CO sub(2) and a 4% reduction in the TOA total solar irradiance ( G1 ). We found huge ozone enhancements throughout most of the stratosphere (up to 40%) as a result of a large computed temperature decrease (up to 18 K) when CO sub(2) was quadrupled (compare simulation abrupt4xCO2 to piControl ). Further, we found that ozone will additionally increase (up to 5%) throughout most of the stratosphere with total ozone increases of 1-2.5% as a result of a reduction in TOA total solar irradiance (compare simulation G1 to abrupt4xCO2 ). Decreases of atomic oxygen and temperature are the main drivers of this computed ozone enhancement from a reduction in TOA total solar irradiance. Key Points * Quadrupling CO sub(2) strongly perturbs the stratosphere * Solar flux reduction in a quadrupled CO sub(2) atmosphere increases total column ozone * Both quadrupled CO sub(2) and reduced solar flux cools the stratosphere and increases ozone JF - Earth's Future AU - Jackman, Charles H AU - Fleming, Eric L AD - NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Y1 - 2014/07// PY - 2014 DA - Jul 2014 SP - 331 EP - 340 PB - Wiley Subscription Services, Inc. VL - 2 IS - 7 SN - 2328-4277, 2328-4277 KW - Meteorological & Geoastrophysical Abstracts; Sustainability Science Abstracts; Environment Abstracts KW - Ozone increase KW - Ozone in stratosphere KW - Temperature KW - Simulation KW - Atmosphere KW - Stratosphere KW - Boundary conditions KW - Ozone layer KW - Solar irradiance KW - Atmospheric models KW - Oxygen KW - Numerical simulations KW - Space exploration KW - Carbon dioxide KW - Ozone KW - M2 551.510.42:Air Pollution (551.510.42) 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/1712568897?accountid=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=Earth%27s+Future&rft.atitle=Stratospheric+ozone+response+to+a+solar+irradiance+reduction+in+a+quadrupled+CO+sub%282%29+environment&rft.au=Jackman%2C+Charles+H%3BFleming%2C+Eric+L&rft.aulast=Jackman&rft.aufirst=Charles&rft.date=2014-07-01&rft.volume=2&rft.issue=7&rft.spage=331&rft.isbn=&rft.btitle=&rft.title=Earth%27s+Future&rft.issn=23284277&rft_id=info:doi/10.1002%2F2014EF000244 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Ozone increase; Ozone in stratosphere; Numerical simulations; Space exploration; Boundary conditions; Stratosphere; Ozone layer; Atmospheric models; Solar irradiance; Oxygen; Temperature; Simulation; Carbon dioxide; Atmosphere; Ozone DO - http://dx.doi.org/10.1002/2014EF000244 ER - TY - JOUR T1 - Diagenetic origin of nodules in the Sheepbed Member, Yellowknife Bay Formation, Gale Crater, Mars AN - 1629943829; 2014-094135 AB - The Sheepbed member of the Yellowknife Bay formation in Gale crater contains millimeter-scale nodules that represent an array of morphologies unlike those previously observed in sedimentary deposits on Mars. Three types of nodules have been identified in the Sheepbed member in order of decreasing abundance: solid nodules, hollow nodules, and filled nodules, a variant of hollow nodules whose voids have been filled with sulfate minerals. This study uses Mast Camera (Mastcam) and Mars Hand Lens Imager (MAHLI) images from the Mars Science Laboratory Curiosity rover to determine the size, shape, and spatial distribution of the Sheepbed nodules. The Alpha Particle X-Ray Spectrometer (APXS) and ChemCam instruments provide geochemical data to help interpret nodule origins. Based on their physical characteristics, spatial distribution, and composition, the nodules are interpreted as concretions formed during early diagenesis. Several hypotheses are considered for hollow nodule formation including origins as primary or secondary voids. The occurrence of concretions interpreted in the Sheepbed mudstone and in several other sedimentary sequences on Mars suggests that active groundwater systems play an important role in the diagenesis of Martian sedimentary rocks. When concretions are formed during early diagenetic cementation, as interpreted for the Sheepbed nodules, they have the potential to create a taphonomic window favorable for the preservation of Martian organics. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Stack, K M AU - Grotzinger, J P AU - Kah, L C AU - Schmidt, M E AU - Mangold, N AU - Edgett, K S AU - Sumner, D Y AU - Siebach, K L AU - Nachon, M AU - Lee, R AU - Blaney, D L AU - Deflores, L P AU - Edgar, L A AU - Fairen, A G AU - Leshin, L A AU - Maurice, S AU - Oehler, Dorothy Z AU - Rice, M S AU - Wiens, R C Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 1637 EP - 1664 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 7 SN - 2169-9097, 2169-9097 KW - secondary structures KW - nodules KW - techniques KW - Mars KW - Sheepbed Member KW - life origin KW - ground water KW - Gale Crater KW - sedimentary rocks KW - alpha-ray spectroscopy KW - Curiosity Rover KW - interpretation KW - sedimentary structures KW - mudstone KW - cementation KW - Yellowknife Bay Formation KW - surface water KW - terrestrial planets KW - planets KW - concretions KW - diagenesis KW - spectroscopy KW - clastic rocks KW - aquatic environment KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943829?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Diagenetic+origin+of+nodules+in+the+Sheepbed+Member%2C+Yellowknife+Bay+Formation%2C+Gale+Crater%2C+Mars&rft.au=Stack%2C+K+M%3BGrotzinger%2C+J+P%3BKah%2C+L+C%3BSchmidt%2C+M+E%3BMangold%2C+N%3BEdgett%2C+K+S%3BSumner%2C+D+Y%3BSiebach%2C+K+L%3BNachon%2C+M%3BLee%2C+R%3BBlaney%2C+D+L%3BDeflores%2C+L+P%3BEdgar%2C+L+A%3BFairen%2C+A+G%3BLeshin%2C+L+A%3BMaurice%2C+S%3BOehler%2C+Dorothy+Z%3BRice%2C+M+S%3BWiens%2C+R+C&rft.aulast=Stack&rft.aufirst=K&rft.date=2014-07-01&rft.volume=119&rft.issue=7&rft.spage=1637&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004617 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 74 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - alpha-ray spectroscopy; aquatic environment; cementation; clastic rocks; concretions; Curiosity Rover; diagenesis; Gale Crater; ground water; instruments; interpretation; life origin; Mars; mudstone; nodules; planets; secondary structures; sedimentary rocks; sedimentary structures; Sheepbed Member; spectroscopy; surface water; techniques; terrestrial planets; Yellowknife Bay Formation DO - http://dx.doi.org/10.1002/2014JE004617 ER - TY - JOUR T1 - Lunar interior properties from the GRAIL Mission AN - 1629943799; 2014-094132 AB - The Gravity Recovery and Interior Laboratory (GRAIL) mission has sampled lunar gravity with unprecedented accuracy and resolution. The lunar GM, the product of the gravitational constant G and the mass M, is very well determined. However, uncertainties in the mass and mean density, 3345.56 + or - 0.40 kg/m (super 3) , are limited by the accuracy of G. Values of the spherical harmonic degree-2 gravity coefficients J (sub 2) and C (sub 22) , as well as the Love number k (sub 2) describing lunar degree-2 elastic response to tidal forces, come from two independent analyses of the 3 month GRAIL Primary Mission data at the Jet Propulsion Laboratory and the Goddard Space Flight Center. The two k (sub 2) determinations, with uncertainties of approximately 1%, differ by 1%; the average value is 0.02416 + or - 0.00022 at a 1 month period with reference radius R = 1738 km. Lunar laser ranging (LLR) data analysis determines (C - A)/B and (B - A)/C, where A < B < C are the principal moments of inertia; the flattening of the fluid outer core; the dissipation at its solid boundaries; and the monthly tidal dissipation Q = 37.5 + or - 4. The moment of inertia computation combines the GRAIL-determined J (sub 2) and C (sub 22) with LLR-derived (C - A)/B and (B - A)/C. The normalized mean moment of inertia of the solid Moon is I (sub s) /MR (super 2) = 0.392728 + or - 0.000012. Matching the density, moment, and Love number, calculated models have a fluid outer core with radius of 200-380 km, a solid inner core with radius of 0-280 km and mass fraction of 0-1%, and a deep mantle zone of low seismic shear velocity. The mass fraction of the combined inner and outer core is < or =1.5%. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Williams, James G AU - Konopliv, Alexander S AU - Boggs, Dale H AU - Park, Ryan S AU - Yuan, Dah-Ning AU - Lemoine, Frank G AU - Goossens, Sander AU - Mazarico, Erwan AU - Nimmo, Francis AU - Weber, Renee C AU - Asmar, Sami W AU - Melosh, H Jay AU - Neumann, Gregory A AU - Phillips, Roger J AU - Smith, David E AU - Solomon, Sean C AU - Watkins, Michael M AU - Wieczorek, Mark A AU - Andrews-Hanna, Jeffrey C AU - Head, James W AU - Kiefer, Walter S AU - Matsuyama, Isamu AU - McGovern, Patrick J AU - Taylor, G Jeffrey AU - Zuber, Maria T Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 1546 EP - 1578 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 7 SN - 2169-9097, 2169-9097 KW - body waves KW - lunar laser ranging KW - Moon KW - mantle KW - elastic waves KW - GRAIL KW - tides KW - outer core KW - Love number KW - gravity field KW - lunar interior KW - velocity KW - core KW - seismic waves KW - S-waves KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943799?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Lunar+interior+properties+from+the+GRAIL+Mission&rft.au=Williams%2C+James+G%3BKonopliv%2C+Alexander+S%3BBoggs%2C+Dale+H%3BPark%2C+Ryan+S%3BYuan%2C+Dah-Ning%3BLemoine%2C+Frank+G%3BGoossens%2C+Sander%3BMazarico%2C+Erwan%3BNimmo%2C+Francis%3BWeber%2C+Renee+C%3BAsmar%2C+Sami+W%3BMelosh%2C+H+Jay%3BNeumann%2C+Gregory+A%3BPhillips%2C+Roger+J%3BSmith%2C+David+E%3BSolomon%2C+Sean+C%3BWatkins%2C+Michael+M%3BWieczorek%2C+Mark+A%3BAndrews-Hanna%2C+Jeffrey+C%3BHead%2C+James+W%3BKiefer%2C+Walter+S%3BMatsuyama%2C+Isamu%3BMcGovern%2C+Patrick+J%3BTaylor%2C+G+Jeffrey%3BZuber%2C+Maria+T&rft.aulast=Williams&rft.aufirst=James&rft.date=2014-07-01&rft.volume=119&rft.issue=7&rft.spage=1546&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004559 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 - PubXState - DC N1 - Document feature - illus. incl. 14 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - body waves; core; elastic waves; GRAIL; gravity field; Love number; lunar interior; lunar laser ranging; mantle; Moon; outer core; remote sensing; S-waves; seismic waves; tides; velocity DO - http://dx.doi.org/10.1002/2013JE004559 ER - TY - JOUR T1 - A blueprint for process-based modeling of uncertain hydrological systems; discussion AN - 1623259182; 2014-088943 JF - Water Resources Research AU - Nearing, Grey Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 6260 EP - 6263 PB - American Geophysical Union, Washington, DC VL - 50 IS - 7 SN - 0043-1397, 0043-1397 KW - hydrology KW - numerical models KW - Bayesian analysis KW - Monte Carlo analysis KW - mathematical methods KW - statistical analysis KW - mathematical models KW - equations KW - uncertainty KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623259182?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+blueprint+for+process-based+modeling+of+uncertain+hydrological+systems%3B+discussion&rft.au=Nearing%2C+Grey&rft.aulast=Nearing&rft.aufirst=Grey&rft.date=2014-07-01&rft.volume=50&rft.issue=7&rft.spage=6260&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR014812 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 - 30 N1 - PubXState - DC N1 - SuppNotes - For reference to original see Montanari, A., Koutsoyiannis, D. Water Resources Research, Vol. 48, W09555, 2012 N1 - Last updated - 2014-11-13 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - Bayesian analysis; equations; hydrology; mathematical methods; mathematical models; Monte Carlo analysis; numerical models; statistical analysis; uncertainty DO - http://dx.doi.org/10.1002/2013WR014812 ER - TY - JOUR T1 - Space Habitation and Microbiology AN - 1566920660 JF - Microbes and Environments AU - AERONAUTICS, NATIONAL AU - ADMINISTRATION (NASA), SPACE AU - Ott, Mark AU - Pierson, Duane AU - AEROSPACE EXPLORATION AGENCY (JAXA), JAPAN AU - Shirakawa, Masaki AU - Tanigaki, Fumiaki AU - Hida, Masamitsu AU - Yamazaki, Takashi AU - Shimazu, Toru AU - Ishioka, Noriaki Y1 - 2014 PY - 2014 DA - 2014 SP - 239 CY - Miyagi PB - Japan Science and Technology Agency VL - 29 IS - 3 SN - 13426311 KW - Biology--Microbiology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566920660?accountid=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=Microbes+and+Environments&rft.atitle=Space+Habitation+and+Microbiology&rft.au=AERONAUTICS%2C+NATIONAL%3BADMINISTRATION+%28NASA%29%2C+SPACE%3BOtt%2C+Mark%3BPierson%2C+Duane%3BAEROSPACE+EXPLORATION+AGENCY+%28JAXA%29%2C+JAPAN%3BShirakawa%2C+Masaki%3BTanigaki%2C+Fumiaki%3BHida%2C+Masamitsu%3BYamazaki%2C+Takashi%3BShimazu%2C+Toru%3BIshioka%2C+Noriaki&rft.aulast=AERONAUTICS&rft.aufirst=NATIONAL&rft.date=2014-07-01&rft.volume=29&rft.issue=3&rft.spage=239&rft.isbn=&rft.btitle=&rft.title=Microbes+and+Environments&rft.issn=13426311&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Copyright - Copyright Japan Science and Technology Agency 2014 N1 - Last updated - 2014-10-02 ER - TY - JOUR T1 - Ocean subsurface studies with the CALIPSO spaceborne lidar AN - 1566809578; 2014-078816 AB - The primary objective of the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) mission is to study the climate impact of clouds and aerosols in the atmosphere. However, recent studies have demonstrated that CALIPSO also collects information about the ocean subsurface. The objective of this study is to estimate the ocean subsurface backscatter from CALIPSO lidar measurements. The effects of the lidar receiver's transient response on the attenuated backscatter were first removed in order to obtain the correct attenuated backscatter profile. The empirical relationship between sea surface lidar backscatter and wind speed was used to estimate the theoretical ocean surface backscatter. Then the two-way atmospheric transmittance was estimated as the ratio between the corrected ocean surface backscatter and the theoretical one. The ocean subsurface backscatter was finally derived from the subsurface attenuated backscatter divided by the two-way atmospheric transmittance. Significant relationships between integrated subsurface backscatter and chlorophyll-a concentration and between integrated subsurface backscatter and particulate organic carbon were found, which indicate a potential use of CALIPSO lidar to estimate global chlorophyll-a and particulate organic carbon concentrations. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Lu, Xiaomei AU - Hu, Yongxiang AU - Trepte, Charles AU - Zeng, Shan AU - Churnside, James H Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 4305 EP - 4317 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 7 SN - 2169-9275, 2169-9275 KW - clouds KW - sea water KW - laser methods KW - pigments KW - atmosphere KW - satellite methods KW - chlorophyll KW - attenuation KW - organic compounds KW - lidar methods KW - theoretical models KW - aerosols KW - porphyrins KW - meteorology KW - world ocean KW - remote sensing KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566809578?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Ocean+subsurface+studies+with+the+CALIPSO+spaceborne+lidar&rft.au=Lu%2C+Xiaomei%3BHu%2C+Yongxiang%3BTrepte%2C+Charles%3BZeng%2C+Shan%3BChurnside%2C+James+H&rft.aulast=Lu&rft.aufirst=Xiaomei&rft.date=2014-07-01&rft.volume=119&rft.issue=7&rft.spage=4305&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2014JC009970 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 - 34 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - aerosols; atmosphere; attenuation; chlorophyll; clouds; laser methods; lidar methods; meteorology; organic compounds; pigments; porphyrins; remote sensing; satellite methods; sea water; theoretical models; world ocean DO - http://dx.doi.org/10.1002/2014JC009970 ER - TY - JOUR T1 - Constraining the carbon tetrachloride (CCl sub(4)) budget using its global trend and inter-hemispheric gradient AN - 1562668425; 20595058 AB - Carbon tetrachloride (CCl sub(4)) is a major anthropogenic ozone-depleting substance and greenhouse gas and has been regulated under the Montreal Protocol. However, the near-zero 2007-2012 emissions estimate based on the UNEP reported production and feedstock usage cannot be reconciled with the observed slow decline of atmospheric concentrations and the inter-hemispheric gradient (IHG) for CCl sub(4). Our 3-D model simulations suggest that the observed IHG (1.5 plus or minus 0.2% for 2000-2012) is primarily caused by ongoing current emissions, while ocean and soil losses and stratosphere-troposphere exchange together contribute a small negative gradient ( similar to 0 - -0.3%). Using the observed CCl sub(4) global trend and IHG, we deduce that the mean global emissions for the 2000-2012 period are 39 super(45) sub(34) Gg/yr ( similar to 30% of the peak 1980s emissions) and a corresponding total lifetime of 35 super(32) sub(37) years. JF - Geophysical Research Letters AU - Liang, Qing AU - Newman, Paul A AU - Daniel, John S AU - Reimann, Stefan AU - Hall, Bradley D AU - Dutton, Geoff AU - Kuijpers, Lambert JM AD - Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 5307 EP - 5315 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 41 IS - 14 SN - 0094-8276, 0094-8276 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Sustainability Science Abstracts; Pollution Abstracts KW - ANW, Canada, Quebec, Montreal KW - Simulation Analysis KW - Climate change KW - Anthropogenic factors KW - Simulation KW - Greenhouse effect KW - Environmental policy KW - Environmental protection KW - International agreements KW - Soil KW - Currents KW - Carbon KW - Oceans KW - Soils KW - Emissions KW - Budgets KW - Greenhouse gases KW - Ozonation KW - Modelling KW - Q2 09262:Methods and instruments KW - P 0000:AIR POLLUTION KW - SW 0810:General KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1562668425?accountid=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=Constraining+the+carbon+tetrachloride+%28CCl+sub%284%29%29+budget+using+its+global+trend+and+inter-hemispheric+gradient&rft.au=Liang%2C+Qing%3BNewman%2C+Paul+A%3BDaniel%2C+John+S%3BReimann%2C+Stefan%3BHall%2C+Bradley+D%3BDutton%2C+Geoff%3BKuijpers%2C+Lambert+JM&rft.aulast=Liang&rft.aufirst=Qing&rft.date=2014-07-01&rft.volume=41&rft.issue=14&rft.spage=5307&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL060754 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Carbon; Soils; Climate change; Anthropogenic factors; Greenhouse effect; Modelling; Soil; Currents; Oceans; Emissions; Simulation; Budgets; Greenhouse gases; Environmental policy; International agreements; Environmental protection; Ozonation; Simulation Analysis; ANW, Canada, Quebec, Montreal DO - http://dx.doi.org/10.1002/2014GL060754 ER - TY - JOUR T1 - Comment on "A blueprint for process-based modeling of uncertain hydrological systems" by Alberto Montanari and Demetris Koutsoyiannis AN - 1560129805; 20548993 AB - Abstract not available JF - Water Resources Research AU - Nearing, Grey AD - NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 6260 EP - 6263 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 50 IS - 7 SN - 0043-1397, 0043-1397 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Hydrologic Models KW - Engineering drawings KW - Water resources KW - Modelling KW - AQ 00006:Sewage KW - SW 0810:General KW - Q2 09161:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560129805?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Comment+on+%22A+blueprint+for+process-based+modeling+of+uncertain+hydrological+systems%22+by+Alberto+Montanari+and+Demetris+Koutsoyiannis&rft.au=Nearing%2C+Grey&rft.aulast=Nearing&rft.aufirst=Grey&rft.date=2014-07-01&rft.volume=50&rft.issue=7&rft.spage=6260&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR014812 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Engineering drawings; Water resources; Modelling; Hydrologic Models DO - http://dx.doi.org/10.1002/2013WR014812 ER - TY - JOUR T1 - Establishment of Exposure Guidelines for Lead in Spacecraft Drinking Water AN - 1560124983; 20501003 AB - Background: Setting Spacecraft Water Exposure Guidelines (SWEGs) for lead (Pb) in spacecraft drinking water has special challenges related to estimating the increase in blood lead levels (PbB) due to the release of lead to systemic circulation via microgravity-induced bone loss. Methods: The effects on the PbB of lead in drinking water (PbW) and lead released from bones, and changes in lead exposure before, during, and after spaceflight, were evaluated using a physiologically based pharmacokinetic model that incorporated environmental lead exposure on Earth and in flight and included temporarily increased rates of osteoporosis during spaceflight. Results: The model predicts that in 2030 (the earliest potential launch date for a long-duration mission), the average American astronaut would have a PbB of 1.7 mu g [miidot] dl super(-1) at launch and that, while in microgravity, PbB levels would decrease at PbW values less than about 9 mu g times L super(-1) because of reduced exposure within the spacecraft to environmental lead. Astronauts with high concentrations of lead stored in bones could experience increases in PbB due to microgravity-accelerated release of lead from bones. While the resultant in-flight PbB would depend on their preflight bone lead levels, their PbB will not be significantly further elevated (< 1 mu g times dl super(-1)) by consuming water with a PbW of [< or =] 9 mu g times dl super(-1). Selection of a SWEG that would not result in an increase in blood lead is prudent given uncertainties about health effects at low exposures. Conclusion: A SWEG of 9 mu g times L super(-1) would protect astronauts on long-duration spaceflights by ensuring that PbB values will not exceed prelaunch levels. JF - Aviation, Space, and Environmental Medicine AU - Garcia, Hector D AU - Tsuji, Joyce S AU - James, John T AD - Wyle Science, Technology and Engineering Group, 1290 Hercules Dr., Ste. 120, Houston, TX 77058, hector.garcia-1@nasa.gov Y1 - 2014/07// PY - 2014 DA - Jul 2014 SP - 715 EP - 720 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 7 SN - 0095-6562, 0095-6562 KW - Health & Safety Science Abstracts KW - lead KW - SWEG KW - spaceflight KW - blood lead KW - bone lead KW - microgravity KW - PBPK models KW - osteoporosis KW - Bone KW - Guidelines KW - Physiology KW - Osteoporosis KW - Spacecraft KW - Drinking water KW - Pharmacokinetics KW - Blood levels KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560124983?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Establishment+of+Exposure+Guidelines+for+Lead+in+Spacecraft+Drinking+Water&rft.au=Garcia%2C+Hector+D%3BTsuji%2C+Joyce+S%3BJames%2C+John+T&rft.aulast=Garcia&rft.aufirst=Hector&rft.date=2014-07-01&rft.volume=85&rft.issue=7&rft.spage=715&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3853.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 31 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Bone; Physiology; Guidelines; Osteoporosis; Drinking water; Spacecraft; Pharmacokinetics; Blood levels DO - http://dx.doi.org/10.3357/ASEM.3853.2014 ER - TY - JOUR T1 - Double bright band observations with high-resolution vertically pointing radar, lidar, and profilers AN - 1560123752; 20554523 AB - On 11 May 2010, an elevated temperature inversion associated with an approaching warm front produced two melting layers simultaneously, which resulted in two distinct bright bands as viewed from the ER-2 Doppler radar system, a vertically pointing, coherent X band radar located in Greenbelt, MD. Due to the high temporal resolution of this radar system, an increase in altitude of the melting layer of approximately 1.2 km in the time span of 4 min was captured. The double bright band feature remained evident for approximately 17 min, until the lower atmosphere warmed enough to dissipate the lower melting layer. This case shows the relatively rapid evolution of freezing levels in response to an advancing warm front over a 2 h time period and the descent of an elevated warm air mass with time. Although observations of double bright bands are somewhat rare, the ability to identify this phenomenon is important for rainfall estimation from spaceborne sensors because algorithms employing the restriction of a radar bright band to a constant height, especially when sampling across frontal systems, will limit the ability to accurately estimate rainfall. Key Points * Elevated temperature inversion produced two bright bands simultaneously * Rapid evolution of freezing levels in response to approaching warm front * Identification of double bright bands important for estimating rainfall JF - Journal of Geophysical Research: Atmospheres AU - Emory, Amber E AU - Demoz, Belay AU - Vermeesch, Kevin AU - Hicks, Micheal AD - NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 8201 EP - 8211 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 13 SN - 2169-897X, 2169-897X KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Prediction KW - Sensors KW - Rainfall KW - Rainfall estimation KW - Algorithms KW - Temperature inversions KW - Melting layer KW - Profilers KW - Melting KW - Sampling KW - Air masses KW - Weather KW - Temperature KW - Freezing KW - Air Masses KW - Doppler radar KW - Fronts KW - Lidar applications KW - Radar KW - LIDAR KW - Evolution KW - Q2 09242:Observations and measurements at sea KW - M2 551.513:General Circulation (551.513) KW - SW 0810:General KW - AQ 00003:Monitoring and Analysis of Water and Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560123752?accountid=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=Double+bright+band+observations+with+high-resolution+vertically+pointing+radar%2C+lidar%2C+and+profilers&rft.au=Emory%2C+Amber+E%3BDemoz%2C+Belay%3BVermeesch%2C+Kevin%3BHicks%2C+Micheal&rft.aulast=Emory&rft.aufirst=Amber&rft.date=2014-07-01&rft.volume=119&rft.issue=13&rft.spage=8201&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD020063 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2016-04-29 N1 - SubjectsTermNotLitGenreText - Prediction; Sensors; Radar; Freezing; Temperature inversions; LIDAR; Profilers; Air masses; Doppler radar; Fronts; Lidar applications; Algorithms; Rainfall estimation; Melting layer; Melting; Weather; Rainfall; Temperature; Air Masses; Sampling; Evolution DO - http://dx.doi.org/10.1002/2013JD020063 ER - TY - JOUR T1 - An examination of the nature of global MODIS cloud regimes AN - 1560104199; 20554519 AB - We introduce global cloud regimes (previously also referred to as "weather states") derived from cloud retrievals that use measurements by the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument aboard the Aqua and Terra satellites. The regimes are obtained by applying clustering analysis on joint histograms of retrieved cloud top pressure and cloud optical thickness. By employing a compositing approach on data sets from satellites and other sources, we examine regime structural and thermodynamical characteristics. We establish that the MODIS cloud regimes tend to form in distinct dynamical and thermodynamical environments and have diverse profiles of cloud fraction and water content. When compositing radiative fluxes from the Clouds and the Earth's Radiant Energy System instrument and surface precipitation from the Global Precipitation Climatology Project, we find that regimes with a radiative warming effect on the atmosphere also produce the largest implied latent heat. Taken as a whole, the results of the study corroborate the usefulness of the cloud regime concept, reaffirm the fundamental nature of the regimes as appropriate building blocks for cloud system classification, clarify their association with standard cloud types, and underscore their distinct radiative and hydrological signatures. Key Points * Cloud systems observed by passive sensors can be decomposed into cloud regimes * The regimes have distinct structures as seen by active sensors * The regimes also have distinct radiative and hydrological signatures JF - Journal of Geophysical Research: Atmospheres AU - Oreopoulos, Lazaros AU - Cho, Nayeong AU - Lee, Dongmin AU - Kato, Seiji AU - Huffman, George J AD - NASA-GSFC, Earth Science Division, Greenbelt, Maryland, USA. Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 8362 EP - 8383 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 13 SN - 2169-897X, 2169-897X KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Clouds KW - Sensors KW - Signatures KW - Hydrology KW - Climatology KW - Atmospheres KW - Precipitation KW - MODIS UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560104199?accountid=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=An+examination+of+the+nature+of+global+MODIS+cloud+regimes&rft.au=Oreopoulos%2C+Lazaros%3BCho%2C+Nayeong%3BLee%2C+Dongmin%3BKato%2C+Seiji%3BHuffman%2C+George+J&rft.aulast=Oreopoulos&rft.aufirst=Lazaros&rft.date=2014-07-01&rft.volume=119&rft.issue=13&rft.spage=8362&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD021409 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1002/2013JD021409 ER - TY - JOUR T1 - International Space Station environmental microbiome - microbial inventories of ISS filter debris AN - 1554944788; 20482906 AB - Despite an expanding array of molecular approaches for detecting microorganisms in a given sample, rapid and robust means of assessing the differential viability of the microbial cells, as a function of phylogenetic lineage, remain elusive. A propidium monoazide (PMA) treatment coupled with downstream quantitative polymerase chain reaction (qPCR) and pyrosequencing analyses was carried out to better understand the frequency, diversity, and distribution of viable microorganisms associated with debris collected from the crew quarters of the International Space Station (ISS). The cultured bacterial counts were more in the ISS samples than cultured fungal population. The rapid molecular analyses targeted to estimate viable population exhibited 5-fold increase in bacterial (qPCR-PMA assay) and 25-fold increase in microbial (adenosine triphosphate assay) burden than the cultured bacterial population. The ribosomal nucleic acid-based identification of cultivated strains revealed the presence of only four to eight bacterial species in the ISS samples, however, the viable bacterial diversity detected by the PMA-pyrosequencing method was far more diverse (12 to 23 bacterial taxa) with the majority consisting of members of actinobacterial genera (Propionibacterium, Corynebacterium) and Staphylococcus. Sample fractions not treated with PMA (inclusive of both live and dead cells) yielded a great abundance of highly diverse bacterial (94 to 118 taxa) and fungal lineages (41 taxa). Even though deep sequencing capability of the molecular analysis widened the understanding about the microbial diversity, the cultivation assay also proved to be essential since some of the spore-forming microorganisms were detected only by the culture-based method. Presented here are the findings of the first comprehensive effort to assess the viability of microbial cells associated with ISS surfaces, and correlate differential viability with phylogenetic affiliation. JF - Applied Microbiology and Biotechnology AU - Venkateswaran, Kasthuri AU - Vaishampayan, Parag AU - Cisneros, Jessica AU - Pierson, Duane L AU - Rogers, Scott O AU - Perry, Jay AD - Biotechnology and Planetary Protection Group, Jet Propulsion Laboratory, California Institute of Technology, M/S 89-2, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA, kjvenkat@jpl.nasa.gov Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 6453 EP - 6466 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 98 IS - 14 SN - 0175-7598, 0175-7598 KW - Microbiology Abstracts B: Bacteriology; Microbiology Abstracts A: Industrial & Applied Microbiology; Biotechnology and Bioengineering Abstracts KW - Phylogeny KW - Filters KW - Inventories KW - Phorbol esters KW - Staphylococcus KW - Microorganisms KW - ATP KW - Polymerase chain reaction KW - Propionibacterium KW - Corynebacterium KW - A 01450:Environmental Pollution & Waste Treatment KW - W 30900:Methods KW - J 02450:Ecology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1554944788?accountid=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+Microbiology+and+Biotechnology&rft.atitle=International+Space+Station+environmental+microbiome+-+microbial+inventories+of+ISS+filter+debris&rft.au=Venkateswaran%2C+Kasthuri%3BVaishampayan%2C+Parag%3BCisneros%2C+Jessica%3BPierson%2C+Duane+L%3BRogers%2C+Scott+O%3BPerry%2C+Jay&rft.aulast=Venkateswaran&rft.aufirst=Kasthuri&rft.date=2014-07-01&rft.volume=98&rft.issue=14&rft.spage=6453&rft.isbn=&rft.btitle=&rft.title=Applied+Microbiology+and+Biotechnology&rft.issn=01757598&rft_id=info:doi/10.1007%2Fs00253-014-5650-6 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Number of references - 58 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Filters; Phylogeny; Inventories; Phorbol esters; Microorganisms; Polymerase chain reaction; ATP; Staphylococcus; Propionibacterium; Corynebacterium DO - http://dx.doi.org/10.1007/s00253-014-5650-6 ER - TY - JOUR T1 - Investigation of pyridine carboxylic acids in CM2 carbonaceous chondrites; potential precursor molecules for ancient coenzymes AN - 1553087658; 2014-062173 AB - The distribution and abundances of pyridine carboxylic acids (including nicotinic acid) in eight CM2 carbonaceous chondrites (ALH 85013, DOM 03183, DOM 08003, EET 96016, LAP 02333, LAP 02336, LEW 85311, and WIS 91600) were investigated by liquid chromatography coupled to UV detection and high resolution Orbitrap mass spectrometry. We find that pyridine monocarboxylic acids are prevalent in CM2-type chondrites and their abundance negatively correlates with the degree of pre-terrestrial aqueous alteration that the meteorite parent body experienced. We also report the first detection of pyridine dicarboxylic acids in carbonaceous chondrites. Additionally, we carried out laboratory studies of proton-irradiated pyridine in carbon dioxide-rich ices (a 1:1 mixture) to serve as a model of the interstellar ice chemistry that may have led to the synthesis of pyridine carboxylic acids. Analysis of the irradiated ice residue shows that a comparable suite of pyridine mono- and dicarboxylic acids was produced, although aqueous alteration may still play a role in the synthesis (and ultimate yield) of these compounds in carbonaceous meteorites. Nicotinic acid is a precursor to nicotinamide adenine dinucleotide, a likely ancient molecule used in cellular metabolism in all of life, and its common occurrence in CM2 chondrites may indicate that meteorites may have been a source of molecules for the emergence of more complex coenzymes on the early Earth. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Smith, Karen E AU - Callahan, Michael P AU - Gerakines, Perry A AU - Dworkin, Jason P AU - House, Christopher H Y1 - 2014/07/01/ PY - 2014 DA - 2014 Jul 01 SP - 1 EP - 12 PB - Elsevier, New York, NY VL - 136 SN - 0016-7037, 0016-7037 KW - stony meteorites KW - Lewis Cliff Meteorites KW - LaPaz Icefield Meteorites KW - Wisconsin Range Meteorites KW - mass spectra KW - Elephant Moraine Meteorites KW - life origin KW - meteorites KW - Dominion Range Meteorites KW - carboxylic acids KW - ultraviolet spectra KW - spectra KW - chondrites KW - interstellar dust KW - coenzymes KW - acids KW - ALH 85013 KW - WIS 91600 KW - biochemistry KW - liquid chromatograms KW - EET 96016 KW - cosmochemistry KW - LAP 02333 KW - carbonaceous chondrites KW - molecular structure KW - models KW - aqueous alteration KW - organic compounds KW - organic acids KW - cosmic dust KW - Allan Hills Meteorites KW - LEW 85311 KW - Antarctica KW - DOM 03183 KW - chromatograms KW - CM chondrites KW - 05B:Petrology of meteorites and tektites KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553087658?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Investigation+of+pyridine+carboxylic+acids+in+CM2+carbonaceous+chondrites%3B+potential+precursor+molecules+for+ancient+coenzymes&rft.au=Smith%2C+Karen+E%3BCallahan%2C+Michael+P%3BGerakines%2C+Perry+A%3BDworkin%2C+Jason+P%3BHouse%2C+Christopher+H&rft.aulast=Smith&rft.aufirst=Karen&rft.date=2014-07-01&rft.volume=136&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.04.001 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 - 61 N1 - PubXState - NY N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-08-14 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - acids; ALH 85013; Allan Hills Meteorites; Antarctica; aqueous alteration; biochemistry; carbonaceous chondrites; carboxylic acids; chondrites; chromatograms; CM chondrites; coenzymes; cosmic dust; cosmochemistry; DOM 03183; Dominion Range Meteorites; EET 96016; Elephant Moraine Meteorites; interstellar dust; LAP 02333; LaPaz Icefield Meteorites; LEW 85311; Lewis Cliff Meteorites; life origin; liquid chromatograms; mass spectra; meteorites; models; molecular structure; organic acids; organic compounds; spectra; stony meteorites; ultraviolet spectra; WIS 91600; Wisconsin Range Meteorites DO - http://dx.doi.org/10.1016/j.gca.2014.04.001 ER - TY - JOUR T1 - Resonant tidal excitation of internal waves in the Earth's fluid core AN - 1553085456; 2014-064492 AB - It has long been speculated that there is a stably stratified layer below the core-mantle boundary, and two recent studies have improved the constraints on the parameters describing this stratification. Here we consider the dynamical implications of this layer using a simplified model. We first show that the stratification in this surface layer has sensitive control over the rate at which tidal energy is transferred to the core. We then show that when the stratification parameters from the recent studies are used in this model, a resonant configuration arrives whereby tidal forces perform elevated rates of work in exciting core flow. Specifically, the internal wave speed derived from the two independent studies (150 and 155 m/s) are in remarkable agreement with the speed (152 m/s) required for excitation of the primary normal mode of oscillation as calculated from full solutions of the Laplace Tidal Equations applied to a reduced-gravity idealized model representing the stratified layer. In evaluating this agreement it is noteworthy that the idealized model assumed may be regarded as the most reduced representation of the stratified dynamics of the layer, in that there are no non-essential dynamical terms in the governing equations assumed. While it is certainly possible that a more realistic treatment may require additional dynamical terms or coupling, it is also clear that this reduced representation includes no freedom for coercing the correlation described. This suggests that one must accept either (1) that tidal forces resonantly excite core flow and this is predicted by a simple model or (2) that either the independent estimates or the dynamical model does not accurately portray the core surface layer and there has simply been an unlikely coincidence between three estimates of a stratification parameter which would otherwise have a broad plausible range. Abstract Copyright (2014) Elsevier, B.V. JF - Physics of the Earth and Planetary Interiors AU - Tyler, Robert H AU - Kuang, Weijia Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 15 EP - 25 PB - Elsevier, Amsterdam VL - 232 SN - 0031-9201, 0031-9201 KW - Earth tides KW - dynamos KW - mantle KW - fluid phase KW - equations KW - Laplace transformations KW - core-mantle boundary KW - layered materials KW - outer core KW - models KW - lower mantle KW - gravity field KW - stratification KW - tidal dissipation KW - mathematical methods KW - core KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553085456?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Resonant+tidal+excitation+of+internal+waves+in+the+Earth%27s+fluid+core&rft.au=Tyler%2C+Robert+H%3BKuang%2C+Weijia&rft.aulast=Tyler&rft.aufirst=Robert&rft.date=2014-07-01&rft.volume=232&rft.issue=&rft.spage=15&rft.isbn=&rft.btitle=&rft.title=Physics+of+the+Earth+and+Planetary+Interiors&rft.issn=00319201&rft_id=info:doi/10.1016%2Fj.pepi.2014.03.006 L2 - http://www.sciencedirect.com/science/journal/00319201 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 - SuppNotes - Includes appendices N1 - Last updated - 2014-11-13 N1 - CODEN - PEPIAM N1 - SubjectsTermNotLitGenreText - core; core-mantle boundary; dynamos; Earth tides; equations; fluid phase; gravity field; Laplace transformations; layered materials; lower mantle; mantle; mathematical methods; models; outer core; stratification; tidal dissipation DO - http://dx.doi.org/10.1016/j.pepi.2014.03.006 ER - TY - JOUR T1 - Natural Fe-bearing oxides and sulfates from the Rio Tinto Mars analog site; critical assessment of VNIR reflectance spectroscopy, laser Raman spectroscopy, and XRD as mineral identification tools AN - 1549617956; 2014-058155 AB - We have characterized complex iron- and sulfate-bearing samples from Rio Tinto (Spain) using X-ray diffraction (XRD), visible-near infrared reflectance (VNIR) spectroscopy, and laser Raman spectroscopy (LRS). Samples were collected for this study from the Pena de Hierro region of Rio Tinto because this site represents a natural acidic environment that is a potential analog for such environments on Mars. We report an evaluation of the capabilities of these three techniques in performing detailed mineralogical characterization of potential Mars-like samples from a natural acidic terrestrial environment. Sulfate minerals found in these samples include gypsum, jarosite, and copiapite, and iron hydroxide bearing minerals found include goethite and ferrihydrite. These sulfate and iron hydroxide/oxyhydroxide minerals were detected by XRD, VNIR, and LRS. Minor quartz was identified in some samples by XRD as well, but was not identified using VNIR spectroscopy. Coordinating the results from these three techniques provides a complete picture of the mineralogical composition of the samples. Field instruments were used for this study to mimic the kinds of analyses that could be performed in the field or on martian rovers. JF - American Mineralogist AU - Sobron, Pablo AU - Bishop, Janice L AU - Blake, David F AU - Chen, Bin AU - Rull, Fernando Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 1199 EP - 1205 PB - Mineralogical Society of America, Washington, DC VL - 99 IS - 7 SN - 0003-004X, 0003-004X KW - near-infrared spectra KW - iron oxides KW - X-ray diffraction data KW - sulfates KW - Pena de Hierro KW - Spain KW - Mars KW - Europe KW - Iberian Peninsula KW - Huelva Spain KW - Southern Europe KW - terrestrial planets KW - planets KW - Raman spectra KW - Andalusia Spain KW - Rio Tinto Spain KW - oxides KW - terrestrial comparison KW - spectra KW - reflectance KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617956?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/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=Natural+Fe-bearing+oxides+and+sulfates+from+the+Rio+Tinto+Mars+analog+site%3B+critical+assessment+of+VNIR+reflectance+spectroscopy%2C+laser+Raman+spectroscopy%2C+and+XRD+as+mineral+identification+tools&rft.au=Sobron%2C+Pablo%3BBishop%2C+Janice+L%3BBlake%2C+David+F%3BChen%2C+Bin%3BRull%2C+Fernando&rft.aulast=Sobron&rft.aufirst=Pablo&rft.date=2014-07-01&rft.volume=99&rft.issue=7&rft.spage=1199&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam.2014.4595 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 - 51 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-11-13 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - Andalusia Spain; Europe; Huelva Spain; Iberian Peninsula; iron oxides; Mars; near-infrared spectra; oxides; Pena de Hierro; planets; Raman spectra; reflectance; Rio Tinto Spain; Southern Europe; Spain; spectra; sulfates; terrestrial comparison; terrestrial planets; X-ray diffraction data DO - http://dx.doi.org/10.2138/am.2014.4595 ER - TY - JOUR T1 - Titan aerosol analog absorption features produced from aromatics in the far infrared AN - 1549617365; 2014-060402 AB - We present results on the formation of Titan aerosol analogs produced via far-UV irradiation of five aromatic precursors: benzene, naphthalene, pyridine, quinoline and isoquinoline. This is the first reported evidence of far-IR emission features observed below 200 cm (super -1) in laboratory-created Titan aerosols. These laboratory studies were motivated by recent analyses of Cassini Composite Infrared Spectrometer (CIRS) spectra that show a broad aerosol emission feature in the far-IR spectral region centered near 140 cm (super -1) , which is unique to Titan's photochemically-produced aerosol (Anderson, C.M., Samuelson, R.E. [2011]. Icarus 212, 762-778). We find that all three of the aerosol analogs formed from nitrogen-containing aromatics have similar broad emission features near that of the observed CIRS far-IR aerosol spectral feature. In addition, the inclusion of 1.5% methane to that of trace amounts of benzene also gives rise to an aerosol with a weak far-IR emission feature located below 200 cm (super -1) . JF - Icarus AU - Sebree, Joshua A AU - Trainer, Melissa G AU - Loeffler, Mark J AU - Anderson, Carrie M Y1 - 2014/07/01/ PY - 2014 DA - 2014 Jul 01 SP - 146 EP - 152 PB - Elsevier, New York, NY VL - 236 SN - 0019-1035, 0019-1035 KW - icy satellites KW - naphthalene KW - photochemistry KW - benzene KW - nitrogen KW - infrared spectra KW - organic compounds KW - Cassini-Huygens Mission KW - hydrocarbons KW - Titan Satellite KW - polycyclic aromatic hydrocarbons KW - aerosols KW - quinoline KW - spectra KW - satellites KW - far infrared spectra KW - aromatic hydrocarbons KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617365?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Titan+aerosol+analog+absorption+features+produced+from+aromatics+in+the+far+infrared&rft.au=Sebree%2C+Joshua+A%3BTrainer%2C+Melissa+G%3BLoeffler%2C+Mark+J%3BAnderson%2C+Carrie+M&rft.aulast=Sebree&rft.aufirst=Joshua&rft.date=2014-07-01&rft.volume=236&rft.issue=&rft.spage=146&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.03.039 L2 - http://www.sciencedirect.com/science/journal/00191035 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 - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-07-31 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - aerosols; aromatic hydrocarbons; benzene; Cassini-Huygens Mission; far infrared spectra; hydrocarbons; icy satellites; infrared spectra; naphthalene; nitrogen; organic compounds; photochemistry; polycyclic aromatic hydrocarbons; quinoline; satellites; spectra; Titan Satellite DO - http://dx.doi.org/10.1016/j.icarus.2014.03.039 ER - TY - JOUR T1 - XANES measurements of Cr valence in olivine and their applications to planetary basalts AN - 1549616898; 2014-058174 AB - In this work we present a series of experiments that examine the relationship between oxygen fugacity and Cr valence ratio in olivine grown from a basaltic liquid. These experiments are specifically targeted for an olivine-rich martian basalt composition that was modeled after the bulk chemistry of the meteorite Yamato 980459 (i.e., Y-98). The chromium valence ratio in the olivine crystals was measured with X-ray absorption near edge spectroscopy (XANES) at the Advanced Photon Source, Argonne National Laboratory. Results from the XANES measurements indicate that the ratio of divalent to trivalent Cr in the olivine is not only systematically correlated with f (sub O2) , but is also reflective of the molar Cr (super 3+) /Cr (super 2+) in the silicate liquid from which it grew. In this way, measurements of Cr valence in olivine phenocrysts can yield important information about the oxygen fugacity and molar Cr (super 3+) /Cr (super 2+) of its parental liquid in the absence of a quenched melt phase. Although the results from the experiments presented in this work specifically apply to the Y-98 parental melt, the concepts and XANES analytical techniques discussed within the text present a novel, generalized methodology that may be applicable to any olivine-bearing basalt. Furthermore, the XANES-based measurements are made on a micrometer-scale, thus potential changes of the Cr (super 3+) /Cr (super 2+) in the melt during crystallization could be examined with a great deal of spatial detail. JF - American Mineralogist AU - Bell, Aaron S AU - Burger, Paul V AU - Le, Loan AU - Shearer, Charles K AU - Papike, James J AU - Sutton, Steve R AU - Newville, Matthew AU - Jones, John Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 1404 EP - 1412 PB - Mineralogical Society of America, Washington, DC VL - 99 IS - 7 SN - 0003-004X, 0003-004X KW - silicates KW - volcanic rocks KW - oxygen KW - igneous rocks KW - olivine group KW - Mars KW - equilibrium KW - X-ray spectra KW - fugacity KW - XANES spectra KW - terrestrial planets KW - nesosilicates KW - planets KW - metals KW - olivine KW - basalts KW - orthosilicates KW - valency KW - spectra KW - Eh KW - chromium KW - 01B:Mineralogy of silicates KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549616898?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/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=XANES+measurements+of+Cr+valence+in+olivine+and+their+applications+to+planetary+basalts&rft.au=Bell%2C+Aaron+S%3BBurger%2C+Paul+V%3BLe%2C+Loan%3BShearer%2C+Charles+K%3BPapike%2C+James+J%3BSutton%2C+Steve+R%3BNewville%2C+Matthew%3BJones%2C+John&rft.aulast=Bell&rft.aufirst=Aaron&rft.date=2014-07-01&rft.volume=99&rft.issue=7&rft.spage=1404&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam.2014.4646 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 - 33 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-07-31 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - basalts; chromium; Eh; equilibrium; fugacity; igneous rocks; Mars; metals; nesosilicates; olivine; olivine group; orthosilicates; oxygen; planets; silicates; spectra; terrestrial planets; valency; volcanic rocks; X-ray spectra; XANES spectra DO - http://dx.doi.org/10.2138/am.2014.4646 ER - TY - NEWS T1 - Airbags Take the Weight in ACTE G-III Loads Tests AN - 1544148752 JF - UPI Space Daily AU - Peter Merlin for Armstrong Flight Research Center Y1 - 2014/07/01/ PY - 2014 DA - 2014 Jul 01 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1544148752?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Airbags+Take+the+Weight+in+ACTE+G-III+Loads+Tests&rft.au=Peter+Merlin+for+Armstrong+Flight+Research+Center&rft.aulast=Peter+Merlin+for+Armstrong+Flight+Research+Center&rft.aufirst=&rft.date=2014-07-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-07-10 ER - TY - CPAPER T1 - True Emission Factors for Western Forest Fires: Better Estimation and Usage T2 - 107th Air and Waste Management Association Annual Conference AN - 1562647379; 6305387 JF - 107th Air and Waste Management Association Annual Conference AU - Chatfield, R Y1 - 2014/06/24/ PY - 2014 DA - 2014 Jun 24 KW - Fires KW - Forest fires KW - Emissions KW - Forests UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1562647379?accountid=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=107th+Air+and+Waste+Management+Association+Annual+Conference&rft.atitle=True+Emission+Factors+for+Western+Forest+Fires%3A+Better+Estimation+and+Usage&rft.au=Chatfield%2C+R&rft.aulast=Chatfield&rft.aufirst=R&rft.date=2014-06-24&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=107th+Air+and+Waste+Management+Association+Annual+Conference&rft.issn=&rft_id=info:doi/ L2 - http://ace2014.awma.org/wp-content/uploads/2013/08/ACE-2014-Final-Program.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-31 N1 - Last updated - 2014-09-18 ER - TY - JOUR T1 - Ice chemistry on outer solar system bodies; carboxylic acids, nitriles, and urea detected in refractory residues produced from the UV photolysis of N (sub 2) :CH (sub 4) :CO-containing ices AN - 1832634009; 704590-14 AB - Radiation processing of the surface ices of outer solar system bodies may result in the production of new chemical species even at low temperatures. Many of the smaller, more volatile molecules that are likely produced by the photolysis of these ices have been well characterized by laboratory experiments. However, the more complex refractory material formed in these experiments remains largely uncharacterized. In this work, we present a series of laboratory experiments in which low-temperature (15-20 K) N (sub 2) :CH (sub 4) :CO ices in relative proportions 100:1:1 are subjected to UV irradiation, and the resulting materials are studied with a variety of analytical techniques including infrared spectroscopy, X-ray absorption near-edge structure spectroscopy, gas chromatography coupled with mass spectrometry, and high-resolution mass spectroscopy. Despite the simplicity of the reactants, these experiments result in the production of a highly complex mixture of molecules from relatively low-mass volatiles (tens of daltons) to high-mass refractory materials (hundreds of daltons). These products include various carboxylic acids, nitriles, and urea, which are also expected to be present on the surface of outer solar system bodies, including Pluto and other transneptunian objects. If these compounds occur in sufficient concentrations in the ices of outer solar system bodies, their characteristic bands may be detectable in the near-infrared spectra of these objects. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Materese, Christopher K AU - Cruikshank, Dale P AU - Sandford, Scott A AU - Imanaka, Hiroshi AU - Nuevo, Michel AU - White, Douglas W Y1 - 2014/06/20/ PY - 2014 DA - 2014 Jun 20 EP - Paper no. 111 PB - IOP Publishing for American Astronomical Society, Bristol VL - 788 IS - 2 SN - 0004-637X, 0004-637X KW - nitriles KW - irradiation KW - refractory materials KW - Kuiper Belt KW - trans-Neptunian objects KW - gas chromatograms KW - aliphatic hydrocarbons KW - mass spectra KW - dwarf planets KW - nitrogen KW - XANES spectra KW - laboratory studies KW - infared spectra KW - urea KW - electromagnetic radiation KW - ice KW - carboxylic acids KW - spectra KW - solar system KW - experimental studies KW - methane KW - organic minerals KW - outer solar system KW - photochemistry KW - alkanes KW - X-ray spectra KW - ultraviolet radiation KW - carbon monoxide KW - organic compounds KW - organic acids KW - photolysis KW - chromatograms KW - hydrocarbons KW - Pluto KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832634009?accountid=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=Ice+chemistry+on+outer+solar+system+bodies%3B+carboxylic+acids%2C+nitriles%2C+and+urea+detected+in+refractory+residues+produced+from+the+UV+photolysis+of+N+%28sub+2%29+%3ACH+%28sub+4%29+%3ACO-containing+ices&rft.au=Materese%2C+Christopher+K%3BCruikshank%2C+Dale+P%3BSandford%2C+Scott+A%3BImanaka%2C+Hiroshi%3BNuevo%2C+Michel%3BWhite%2C+Douglas+W&rft.aulast=Materese&rft.aufirst=Christopher&rft.date=2014-06-20&rft.volume=788&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%2F788%2F2%2F111 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 - 58 N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; carbon monoxide; carboxylic acids; chromatograms; dwarf planets; electromagnetic radiation; experimental studies; gas chromatograms; hydrocarbons; ice; infared spectra; irradiation; Kuiper Belt; laboratory studies; mass spectra; methane; nitriles; nitrogen; organic acids; organic compounds; organic minerals; outer solar system; photochemistry; photolysis; Pluto; refractory materials; solar system; spectra; trans-Neptunian objects; ultraviolet radiation; urea; X-ray spectra; XANES spectra DO - http://dx.doi.org/10.1088/0004-637X/788/2/111 ER - TY - JOUR T1 - The lunar thermal ice pump AN - 1832633806; 704590-72 AB - It has long been suggested that water ice can exist in extremely cold regions near the lunar poles, where sublimation loss is negligible. The geographic distribution of H-bearing regolith shows only a partial or ambiguous correlation with permanently shadowed areas, thus suggesting that another mechanism may contribute to locally enhancing water concentrations. We show that under suitable conditions, water molecules can be pumped down into the regolith by day-night temperature cycles, leading to an enrichment of H (sub 2) O in excess of the surface concentration. Ideal conditions for pumping are estimated and found to occur where the mean surface temperature is below 105 K and the peak surface temperature is above 120 K. These conditions complement those of the classical cold traps that are roughly defined by peak temperatures lower than 120 K. On the present-day Moon, an estimated 0.8% of the global surface area experiences such temperature variations. Typically, pumping occurs on pole-facing slopes in small areas, but within a few degrees of each pole the equator-facing slopes are preferred. Although pumping of water molecules is expected over cumulatively large areas, the absolute yield of this pump is low; at best, a few percent of the H (sub 2) O delivered to the surface could have accumulated in the near-surface layer in this way. The amount of ice increases with vapor diffusivity and is thus higher in the regolith with large pore spaces. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Schorghofer, Norbert AU - Aharonson, Oded Y1 - 2014/06/20/ PY - 2014 DA - 2014 Jun 20 EP - Paper no. 169 PB - IOP Publishing for American Astronomical Society, Bristol VL - 788 IS - 2 SN - 0004-637X, 0004-637X KW - water KW - Moon KW - enrichment KW - cyclic processes KW - pumping KW - Polar regions KW - water vapor KW - temperature KW - cold traps KW - sublimation KW - volatiles KW - ice KW - hydrogen KW - permanently shadowed regions KW - low temperature KW - diurnal variations KW - regolith KW - diffusivity KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832633806?accountid=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=The+lunar+thermal+ice+pump&rft.au=Schorghofer%2C+Norbert%3BAharonson%2C+Oded&rft.aulast=Schorghofer&rft.aufirst=Norbert&rft.date=2014-06-20&rft.volume=788&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%2F788%2F2%2F169 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 - 20 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - cold traps; cyclic processes; diffusivity; diurnal variations; enrichment; hydrogen; ice; low temperature; Moon; permanently shadowed regions; Polar regions; pumping; regolith; sublimation; temperature; volatiles; water; water vapor DO - http://dx.doi.org/10.1088/0004-637X/788/2/169 ER - TY - JOUR T1 - Journal of Geophysical Research: Atmospheres AN - 1618132078; 2014-086463 JF - Journal of Geophysical Research: Atmospheres AU - Schmidt, Anja AU - Thordarson, Thorvaldur AU - Oman, Luke D AU - Robock, Alan AU - Self, Stephen Y1 - 2014/06/16/ PY - 2014 DA - 2014 Jun 16 SP - 6636 EP - 6637 PB - Blackwell Wiley for American Geophysical Union, Washington, DC VL - 119 IS - 11 SN - 2169-897X, 2169-897X KW - Laki KW - Western Europe KW - isotopes KW - isotope ratios KW - Arctic region KW - Europe KW - stable isotopes KW - Greenland KW - S-34/S-32 KW - volcanism KW - Grimsvotn KW - eruptions KW - volcanoes KW - sulfur KW - aerosols KW - Iceland KW - 24:Quaternary geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618132078?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Journal+of+Geophysical+Research%3A+Atmospheres&rft.au=Schmidt%2C+Anja%3BThordarson%2C+Thorvaldur%3BOman%2C+Luke+D%3BRobock%2C+Alan%3BSelf%2C+Stephen&rft.aulast=Schmidt&rft.aufirst=Anja&rft.date=2014-06-16&rft.volume=119&rft.issue=11&rft.spage=6636&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD021440 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 - 23 N1 - PubXState - DC N1 - SuppNotes - For reference to discussion see Cole-Dai, J., et al., J. Geophys. Res., Atmospheres, Vol. 119, D11, pp. 6629-6635, DOI: 10.1002/2013JD019869, 2014; for reference to the original see Schmidt, A., For reference to the original see Schmidt, A., et al., J. Geophys. Res., Atmospheres, Vol. 117, D23116, DOI: 10.1029/2012JD018414, 2012 N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - aerosols; Arctic region; eruptions; Europe; Greenland; Grimsvotn; Iceland; isotope ratios; isotopes; Laki; S-34/S-32; stable isotopes; sulfur; volcanism; volcanoes; Western Europe DO - http://dx.doi.org/10.1002/2013JD021440 ER - TY - RPRT T1 - SPACEX TEXAS LAUNCH SITE, CAMERON COUNTY, TEXAS. AN - 1650957329; 16158 AB - PURPOSE: The issuance of licenses and/or experimental permits that would allow Space Exploration Technologies Corp. (SpaceX) to launch the Falcon 9 and Falcon Heavy orbital vertical launch vehicles and a variety of reusable suborbital launch vehicles from a site on privately owned property in Cameron County, Texas is proposed. Proposed operations would consist of up to 12 launches per year with a maximum of two Falcon Heavy launches, through the year 2022. To support these launches, SpaceX has proposed the construction of a vertical launch area and a control center area at a site approximately 17 miles east-northeast of the Brownsville/South Padre Island International Airport and five miles south of South Padre Island. All facilities would be constructed through private funding, on currently undeveloped privately-owned property that would be purchased or leased by SpaceX. In addition, a new underground power line would be installed in the State Highway 4 road right-of-way from the control center area to the vertical launch area. All Falcon 9 and Falcon Heavy launches would be expected to have commercial payloads, including satellites or experimental payloads. In addition to standard payloads, the Falcon 9 and Falcon Heavy may also carry a capsule, such as the SpaceX Dragon capsule. The Falcon 9 and Falcon Heavy use liquid fuels including liquid oxygen and rocket propellant-1. All launch trajectories would be to the east over the Gulf of Mexico and sonic booms generated by launch events would impact the ocean surface 40 miles off the coast and would not be audible on land. The majority of launches would be conducted between the hours of 7:00 a.m. and 7:00 p.m. However, there could be one nighttime launch per year. SpaceX proposes to limit public access at two pre-defined checkpoints on State Highway 4 for up to 15 hours on launch day, with six hours being the closure time for a nominal launch. In addition to the proposed action, this final EIS considers a No Action Alternative. POSITIVE IMPACTS: Authorization would respond to the statutory direction from Congress under the Commercial Space Launch Act to encourage, facilitate, and promote commercial space launch and reentry activities by the private sector in order to strengthen and expand U.S. space transportation infrastructure. NEGATIVE IMPACTS: Construction would result in direct impact to 3.3 acres of wetlands and indirect impact to 2.9 acres of wetlands. The proposed action would displace 15.7 acres of upland habitat and is likely to adversely affect the piping plover and its critical habitat, the northern aplomado falcon, and the jaguarundi and ocelot. The proposed vertical launch and control center areas would likely have a significant impact on visual resources. Three historic properties within the five-mile area of potential influence may be physically damaged from vibrations caused by high noise levels from a Falcon vehicle launch. Nighttime launch operations would result in considerably higher levels of light emissions than those currently present from Boca Chica Village. JF - EPA number: 140162, Final EIS Volume I--392 pages, Volume II--906, Volume III--278 pages, June 6, 2014 PY - 2014 KW - Research and Development KW - Air Quality Assessments KW - Aircraft KW - Aircraft Noise KW - Birds KW - Historic Sites KW - Noise Assessments KW - Section 106 Statements KW - Section 4(f) Statements KW - Spacecraft KW - Visual Resources KW - Wildlife KW - Wildlife Habitat KW - Texas KW - Commercial Space Launch Act of 2011, Compliance KW - Federal Water Pollution Control Act of 1972, Section 404 Permits KW - River and Harbor Act of 1899, Section 10 Permits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1650957329?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/Environmental+Impact+Statements%3A+Digests&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=report&rft.jtitle=&rft.atitle=&rft.au=&rft.aulast=&rft.aufirst=&rft.date=2014-06-06&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=SPACEX+TEXAS+LAUNCH+SITE%2C+CAMERON+COUNTY%2C+TEXAS.&rft.title=SPACEX+TEXAS+LAUNCH+SITE%2C+CAMERON+COUNTY%2C+TEXAS.&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Name - Department of Transportation, Federal Aviation Administration, Office of Commercial Space Transportation, Washington, District of Columbia; DOT N1 - Date revised - 2015-02-01 N1 - SuppNotes - Final. Preparation date: June 6, 2014 N1 - Last updated - 2015-02-04 ER - TY - RPRT T1 - MARS 2020 MISSION, BREVARD COUNTY, FLORIDA. AN - 16378140; 16159 AB - PURPOSE: A mission to Mars to conduct comprehensive science on the surface of Mars and to demonstrate technological advancements in the exploration of Mars is proposed. This draft EIS for the Mars 2020 mission is a tiered document under the Mars Exploration Program (MEP). The proposed mission would employ new in situ scientific instrumentation in order to seek signs of past life, select and store a promising suite of samples in a returnable cache, and demonstrate technology for future robotic and human exploration of Mars. NASAs proposed Mars 2020 mission would use the proven design and technology developed for the Mars Science Laboratory (MSL) rover Curiosity that arrived on Mars in August 2012. Like Curiosity, the proposed Mars 2020 rover would be powered by a Multi- Mission Radioisotope Thermoelectric Generator (MMRTG). NASA would select a scientifically important landing site based upon data from past and current missions. This second tiered draft EIS analyzes three action alternatives and one no action alternative. Under Alternative 1, the Proposed Action and NASAs Preferred Alternative, NASA proposes to continue preparations for and implement the Mars 2020 mission to the surface of Mars. The proposed Mars 2020 spacecraft would be launched on board an expendable launch vehicle from Kennedy Space Center (KSC) or Cape Canaveral Air Force Station (CCAFS), Brevard County, Florida, during a 20-day launch opportunity that runs from July through August 2020, and would be inserted into a trajectory toward Mars. Should the mission be delayed, the proposed Mars 2020 mission would be launched during the next available launch opportunity in August through September 2022. The rover proposed for the Mars 2020 mission would utilize a radioisotope power system to continually provide heat and electrical power to the rovers battery so that the rover could operate and conduct science on the surface of Mars. Under Alternative 2, NASA would discontinue preparations for the Proposed Action (Alternative 1) and implement an alternative configuration for the Mars 2020 mission to Mars. The Mars 2020 rover would utilize solar power as its source electrical power to operate and conduct science on the surface of Mars. The alternative Mars 2020 spacecraft would still be launched on board an expendable launch vehicle from KSC or CCAFS, Brevard County, Florida, during a 20-day launch opportunity that runs from July through August 2020, and would be inserted into a trajectory toward Mars. Like Alternative 1, should the mission be delayed, the proposed Mars 2020 mission would be launched during the next available launch opportunity in August through September 2022. Under Alternative 3, NASA would discontinue preparations for the Proposed Action (Alternative 1) and implement an alternative configuration for the Mars 2020 mission to Mars. The Mars 2020 rover would utilize solar power as its source of electrical power to operate and conduct science on the surface of Mars. The rover thermal environment would be augmented by the thermal output from Light-Weight Radioisotope Heater Units (LWRHUs) to help keep the rovers onboard systems at proper operating temperatures. The Mars 2020 spacecraft would still be launched on board an expendable launch vehicle from KSC or CCAFS, Brevard County, Florida, during a 20-day launch opportunity that runs from July through August 2020, and would be inserted into a trajectory toward Mars. Should the mission be delayed, the proposed Mars 2020 mission would be launched during the next available launch opportunity in August through September 2022. POSITIVE IMPACTS: The Mars 2020 mission would: (1) characterize the processes that formed and modified the geologic record within a field exploration area on Mars selected for evidence of an astrobiologically relevant ancient environment and geologic diversity; (2) perform astrobiologically-relevant investigations on the geologic materials at the landing site; (3) assemble a returnable cache of samples for possible future return to Earth; and (4) contribute to the preparation for human exploration of Mars by making significant progress towards filling at least one major Strategic Knowledge Gap. NEGATIVE IMPACTS: All action alternatives would include exhaust emissions from the launch vehicle which would include short-term impacts on air quality from the exhaust cloud at and near the launch pad, and short-term acidic deposition on the vegetation and surface water bodies at and near the launch complex. Some short-term ozone degradation would occur along the flight path of the vehicle as the vehicle passes through the stratosphere and deposits ozone-depleting chemicals (primarily hydrogen chloride) from its solid rocket boosters. Non-radiological accidents could occur during preparation for and launch of the Mars 2020 spacecraft at the KSC or CCAFS. JF - EPA number: 140163, Draft EIS--314 pages, June 6, 2014 PY - 2014 KW - Research and Development KW - Aerospace KW - International Programs KW - Research KW - Radioactive Substances KW - Military Facilities (Air Force) KW - Spacecraft KW - Solar Energy KW - Air Quality KW - Mars KW - Florida KW - Kennedy Space Center KW - Cape Canaveral Air Force Station UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16378140?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/Environmental+Impact+Statements%3A+Digests&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=report&rft.jtitle=&rft.atitle=&rft.au=&rft.aulast=&rft.aufirst=&rft.date=2014-06-06&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=MARS+2020+MISSION%2C+BREVARD+COUNTY%2C+FLORIDA.&rft.title=MARS+2020+MISSION%2C+BREVARD+COUNTY%2C+FLORIDA.&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Name - National Aeronautics and Space Administration, Science Mission Directorate, Washington, District of Columbia; NASA N1 - Date revised - 2015-02-01 N1 - SuppNotes - Draft. Preparation date: June 6, 2014 N1 - Last updated - 2015-02-04 ER - TY - NEWS T1 - May the Force (Shoes) Be With You AN - 1532873815 JF - UPI Space Daily AU - Andrea Dunn and Charles W. Lloyd for NASA News Y1 - 2014/06/06/ PY - 2014 DA - 2014 Jun 06 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1532873815?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=May+the+Force+%28Shoes%29+Be+With+You&rft.au=Andrea+Dunn+and+Charles+W.+Lloyd+for+NASA+News&rft.aulast=Andrea+Dunn+and+Charles+W.+Lloyd+for+NASA+News&rft.aufirst=&rft.date=2014-06-06&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-06-06 ER - TY - NEWS T1 - NASA Airborne Research Focuses on Andean Volcanoes AN - 1531441060 JF - UPI Space Daily AU - Beth Hagenauer for Armstrong Flight Research Center Y1 - 2014/06/02/ PY - 2014 DA - 2014 Jun 02 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1531441060?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NASA+Airborne+Research+Focuses+on+Andean+Volcanoes&rft.au=Beth+Hagenauer+for+Armstrong+Flight+Research+Center&rft.aulast=Beth+Hagenauer+for+Armstrong+Flight+Research+Center&rft.aufirst=&rft.date=2014-06-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-06-03 ER - TY - JOUR T1 - Data Management in Astrobiology: Challenges and Opportunities for an Interdisciplinary Community AN - 1837302675; PQ0003746411 AB - Data management and sharing are growing concerns for scientists and funding organizations throughout the world. Funding organizations are implementing requirements for data management plans, while scientists are establishing new infrastructures for data sharing. One of the difficulties is sharing data among a diverse set of research disciplines. Astrobiology is a unique community of researchers, containing over 110 different disciplines. The current study reports the results of a survey of data management practices among scientists involved in the astrobiology community and the NASA Astrobiology Institute (NAI) in particular. The survey was administered over a 2-month period in the first half of 2013. Fifteen percent of the NAI community responded (n=114), and additional (n=80) responses were collected from members of an astrobiology Listserv. The results of the survey show that the astrobiology community shares many of the same concerns for data sharing as other groups. The benefits of data sharing are acknowledged by many respondents, but barriers to data sharing remain, including lack of acknowledgement, citation, time, and institutional rewards. Overcoming technical, institutional, and social barriers to data sharing will be a challenge into the future. Key Words: Data management-Data sharing-Data preservation. Astrobiology 14, 451-461. JF - Astrobiology AU - Aydinoglu, Arsev Umur AU - Suomela, Todd AU - Malone, Jim AD - NASA Astrobiology Institute, NASA Ames Research Center, Moffett Field, California. Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 451 EP - 461 PB - Mary Ann Liebert, Inc., 2 Madison Ave Larchmont NY 10538-1962 United States VL - 14 IS - 6 SN - 1531-1074, 1531-1074 KW - ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts KW - Data processing KW - Barriers KW - Financing KW - Reinforcement KW - Preservation KW - Environment management KW - D 04040:Ecosystem and Ecology Studies KW - Q1 08604:Stock assessment and management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1837302675?accountid=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=Astrobiology&rft.atitle=Data+Management+in+Astrobiology%3A+Challenges+and+Opportunities+for+an+Interdisciplinary+Community&rft.au=Aydinoglu%2C+Arsev+Umur%3BSuomela%2C+Todd%3BMalone%2C+Jim&rft.aulast=Aydinoglu&rft.aufirst=Arsev&rft.date=2014-06-01&rft.volume=14&rft.issue=6&rft.spage=451&rft.isbn=&rft.btitle=&rft.title=Astrobiology&rft.issn=15311074&rft_id=info:doi/10.1089%2Fast.2013.1127 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-11-01 N1 - Number of references - 18 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Barriers; Financing; Environment management; Data processing; Reinforcement; Preservation DO - http://dx.doi.org/10.1089/ast.2013.1127 ER - TY - JOUR T1 - Surface albedo darkening from wildfires in northern sub-Saharan Africa AN - 1709175123; PQ0001859763 AB - Northern sub-Saharan Africa (NSSA) has a wide variety of climate zones or biomes, where albedo dynamics are highly coupled with vegetation dynamics and fire disturbances. Quantifying surface albedo variations due to fire disturbances on time scales of several months to several years is complex and is made worse by lack of accurate and spatially consistent surface albedo data. Here, we estimate the surface albedo effect from wildfires in different land cover types in the NSSA region using Moderate Resolution Imaging Spectroradiometer (MODIS) multi-year observational data (2003-11). The average decrease in albedo after fires at the scale of 1 km MODIS footprint is -0.002 02 + or - 0.000 03 for woody savanna and -0.002 22 + or - 0.000 03 for savanna. These two land cover types together account for > 86% of the total MODIS fire count between 2003 and 2011. We found that only a small fraction of the pixels ([< or =, slanted] 10%) burn in two successive years and about 47% had any fire recurrence in 9 years. The study also derived the trajectories of post-fire albedo dynamics from the percentages of pixels that recover to pre-fire albedo values each year. We found that the persistence of surface albedo darkening in most land cover types in the NSSA region is limited to about 6-7 years, after which at least 99% of the burnt pixels recover to their pre-fire albedo. Our results provide critical information for deriving necessary input to various models used in determining the effects of albedo change due to wild fires in the NSSA region. JF - Environmental Research Letters AU - Gatebe, C K AU - Ichoku, C M AU - Poudyal, R AU - Roman, M O AU - Wilcox, E AD - Universities Space Research Association, Columbia, Maryland 20146, USA, charles.k.gatebe@nasa.gov Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1 EP - 12 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 9 IS - 6 SN - 1748-9326, 1748-9326 KW - Sustainability Science Abstracts KW - surface albedo KW - wildfires KW - sub-Saharan Africa KW - MODIS KW - biomass burning KW - albedo recovery KW - albedo darkening KW - Burns KW - Fires KW - Savannahs KW - Wildfire KW - Albedo KW - Climate KW - Africa KW - Vegetation KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709175123?accountid=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=Surface+albedo+darkening+from+wildfires+in+northern+sub-Saharan+Africa&rft.au=Gatebe%2C+C+K%3BIchoku%2C+C+M%3BPoudyal%2C+R%3BRoman%2C+M+O%3BWilcox%2C+E&rft.aulast=Gatebe&rft.aufirst=C&rft.date=2014-06-01&rft.volume=9&rft.issue=6&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=17489326&rft_id=info:doi/10.1088%2F1748-9326%2F9%2F6%2F065003 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Burns; Savannahs; Fires; Wildfire; Albedo; Climate; Vegetation; Africa DO - http://dx.doi.org/10.1088/1748-9326/9/6/065003 ER - TY - JOUR T1 - Geology, tectonics and topography underlined by L'Aquila earthquake TIR precursors AN - 1623280371; 2014-074032 AB - Anomalous thermal infrared (TIR) emissions have widely been detected by satellite sensors before the major earthquakes. A recent processing technique for geostationary thermal data, developed for the case of the 2009 April 6, magnitude 6.3 L'Aquila earthquake, makes it possible to identify areas of enhanced TIR emissions around the epicentral region at a mean distance of less than 50 km but inside a radius of about 100 km. The index, called Night Thermal Gradient (NTG), derived from 4-D time-series data (two spatial and two temporal coordinates), identifies TIR anomalies by following the temperature trend during night, when the surface of the Earth is expected to cool. Leading up to the L'Aquila earthquake, an anomalous warming trend was observed. In this study, the anomalous NTG pattern is compared to the expected normal trend, taking into account the seismogenic faults, the overall tectonic setting, lithological spatial features, the orography and world stress map near the epicentral region. Main results are that a certain lithological selectivity can be recognized and that the known main stress field and seismogenic faults seem to be less important than certain tectonic lineaments, which are classified as non-seismogenic. The strong correlation between the topography and the TIR anomalies is in agreement with proposed physical mechanism for the generation of TIR anomalies. This relation is, in turn, present mainly in correspondence to two tectonic lineaments which in particular are thrusts: therefore, strong compressive states seem to be a positive condition for the generation of TIR anomalies. The temporary modification of these stress fields have triggered the Paganica Fault to its normal rupture mechanism. It is important to note that the distances, over which the TIR anomalies occurred, are an order of magnitude larger than the estimated length of the main fault rupture. Pixel-by-pixel time-series comparisons between the maximum TIR anomaly area and the epicenter of the main shock show that the increase in radiative emission occurred in the areas of maximum TIR anomalies and did not start by spreading outward from the epicentral region. JF - Geophysical Journal International AU - Piroddi, Luca AU - Ranieri, Gaetano AU - Freund, Friedemann AU - Trogu, Antonio Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1532 EP - 1536 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 197 IS - 3 SN - 0956-540X, 0956-540X KW - precursors KW - geologic hazards KW - thermal infrared spectra KW - Europe KW - Italy KW - Southern Europe KW - thermal analysis KW - L'Aquila earthquake 2009 KW - seismicity KW - earthquake prediction KW - seismic risk KW - natural hazards KW - risk assessment KW - tectonics KW - algorithms KW - earthquakes KW - Abruzzi Italy KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623280371?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geology%2C+tectonics+and+topography+underlined+by+L%27Aquila+earthquake+TIR+precursors&rft.au=Piroddi%2C+Luca%3BRanieri%2C+Gaetano%3BFreund%2C+Friedemann%3BTrogu%2C+Antonio&rft.aulast=Piroddi&rft.aufirst=Luca&rft.date=2014-06-01&rft.volume=197&rft.issue=3&rft.spage=1532&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu123 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 33 N1 - Document feature - illus. incl. 1 table, geol. sketch maps N1 - Last updated - 2014-11-13 N1 - SubjectsTermNotLitGenreText - Abruzzi Italy; algorithms; earthquake prediction; earthquakes; Europe; geologic hazards; Italy; L'Aquila earthquake 2009; natural hazards; precursors; risk assessment; seismic risk; seismicity; Southern Europe; tectonics; thermal analysis; thermal infrared spectra DO - http://dx.doi.org/10.1093/gji/ggu123 ER - TY - JOUR T1 - What does CloudSat reveal about global land precipitation detection by other spaceborne sensors? AN - 1623274420; 2014-091147 AB - Current orbital land precipitation products have serious shortcomings in detecting light rain and snowfall, the most frequent types of global precipitation. The missed precipitation is then propagated into the merged precipitation products that are widely used. Precipitation characteristics such as frequency and intensity and their regional distribution are expected to change in a warming climate. It is important to accurately capture those characteristics to understand and model the current state of the Earth's climate and predict future changes. In this work, the precipitation detection performance of a suite of precipitation sensors, commonly used in generating the merged precipitation products, are investigated. The high sensitivity of CloudSat Cloud Profiling Radar (CPR) to liquid and frozen hydrometeors enables superior estimates of light rainfall and snowfall within 80 degrees S-80 degrees N. Three years (2007-2009) of CloudSat precipitation data were collected to construct a climatology reference for guiding our analysis. In addition, auxiliary data such as infrared brightness temperature, surface air temperature, and cloud types were used for a more detailed assessment. The analysis shows that no more than 50% of the tropical (40 degrees S-40 degrees N) precipitation occurrence is captured by the current suite of precipitation measuring sensors. Poleward of 50 degrees latitude, a combination of various factors such as an abundance of light rainfall, snowfall, shallow precipitation-bearing clouds, and frozen surfaces reduces the space-based precipitation detection rate to less than 20%. This shows that for a better understanding of precipitation from space, especially at higher latitudes, there is a critical need to improve current precipitation retrieval techniques and sensors. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Behrangi, Ali AU - Tian, Yudong AU - Lambrigtsen, Bjorn H AU - Stephens, Graeme L Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 4893 EP - 4905 PB - American Geophysical Union, Washington, DC VL - 50 IS - 6 SN - 0043-1397, 0043-1397 KW - hydrology KW - rainfall KW - global KW - radar methods KW - atmospheric precipitation KW - orbital observations KW - satellite methods KW - remote sensing KW - CloudSat KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623274420?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=What+does+CloudSat+reveal+about+global+land+precipitation+detection+by+other+spaceborne+sensors%3F&rft.au=Behrangi%2C+Ali%3BTian%2C+Yudong%3BLambrigtsen%2C+Bjorn+H%3BStephens%2C+Graeme+L&rft.aulast=Behrangi&rft.aufirst=Ali&rft.date=2014-06-01&rft.volume=50&rft.issue=6&rft.spage=4893&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR014566 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 - 67 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-11-13 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - atmospheric precipitation; CloudSat; global; hydrology; orbital observations; radar methods; rainfall; remote sensing; satellite methods DO - http://dx.doi.org/10.1002/2013WR014566 ER - TY - JOUR T1 - Debates-the future of hydrological sciences; a (common) path forward; using models and data to learn; a systems theoretic perspective on the future of hydrological science AN - 1623274401; 2014-091176 JF - Water Resources Research AU - Gupta, Hoshin V AU - Nearing, Grey S Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 5351 EP - 5359 PB - American Geophysical Union, Washington, DC VL - 50 IS - 6 SN - 0043-1397, 0043-1397 KW - hydrology KW - theoretical studies KW - numerical models KW - research KW - concepts KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623274401?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Debates-the+future+of+hydrological+sciences%3B+a+%28common%29+path+forward%3B+using+models+and+data+to+learn%3B+a+systems+theoretic+perspective+on+the+future+of+hydrological+science&rft.au=Gupta%2C+Hoshin+V%3BNearing%2C+Grey+S&rft.aulast=Gupta&rft.aufirst=Hoshin&rft.date=2014-06-01&rft.volume=50&rft.issue=6&rft.spage=5351&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR015096 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 - 28 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-11-13 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - concepts; hydrology; numerical models; research; theoretical studies DO - http://dx.doi.org/10.1002/2013WR015096 ER - TY - JOUR T1 - Estimating information entropy for hydrological data; one-dimensional case AN - 1623272233; 2014-091152 AB - There has been a recent resurgence of interest in the application of Information Theory to problems of system identification in the Earth and Environmental Sciences. While the concept of entropy has found increased application, little attention has yet been given to the practical problems of estimating entropy when dealing with the unique characteristics of two commonly used kinds of hydrologic data: rainfall and runoff. In this paper, we discuss four important issues of practical relevance that can bias the computation of entropy if not properly handled. The first (zero effect) arises when precipitation and ephemeral streamflow data must be viewed as arising from a discrete-continuous hybrid distribution due to the occurrence of many zero values (e.g., days with no rain/no runoff). Second, in the widely used bin-counting method for estimation of PDF's, significant error can be introduced if the bin width is not carefully selected. The third (measurement effect) arises due to the fact that continuously varying hydrologic variables can typically only be observed discretely to some degree of precision. The Fourth (skewness effect) arises when the distribution of a variable is significantly skewed. Here we present an approach that can deal with all four of these issues, and test them with artificially generated and real hydrological data. The results indicate that the method is accurate and robust. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Gong, Wei AU - Yang, Dawen AU - Gupta, Hoshin V AU - Nearing, Grey S Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 5003 EP - 5018 PB - American Geophysical Union, Washington, DC VL - 50 IS - 6 SN - 0043-1397, 0043-1397 KW - hydrology KW - rainfall KW - entropy KW - statistical analysis KW - ephemeral streams KW - atmospheric precipitation KW - equations KW - information theory KW - probability density function KW - observations KW - errors KW - streamflow KW - runoff KW - mathematical methods KW - streams KW - accuracy KW - rain KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623272233?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Estimating+information+entropy+for+hydrological+data%3B+one-dimensional+case&rft.au=Gong%2C+Wei%3BYang%2C+Dawen%3BGupta%2C+Hoshin+V%3BNearing%2C+Grey+S&rft.aulast=Gong&rft.aufirst=Wei&rft.date=2014-06-01&rft.volume=50&rft.issue=6&rft.spage=5003&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2014WR015874 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 - 40 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-11-13 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - accuracy; atmospheric precipitation; entropy; ephemeral streams; equations; errors; hydrology; information theory; mathematical methods; observations; probability density function; rain; rainfall; runoff; statistical analysis; streamflow; streams DO - http://dx.doi.org/10.1002/2014WR015874 ER - TY - JOUR T1 - Atmospheric NO (sub 2) dynamics and impact on ocean color retrievals in urban nearshore regions AN - 1623271679; 2014-091220 AB - Urban nearshore regions are characterized by strong variability in atmospheric composition, associated with anthropogenic emissions and meteorological processes that influence the circulation and accumulation of atmospheric pollutants at the land-water interface. If not adequately corrected in satellite retrievals of ocean color, this atmospheric variability can impose a false impression of diurnal and seasonal changes in nearshore water quality and biogeochemical processes. Consideration of these errors is important for measurements from polar orbiting ocean color sensors but becomes critical for geostationary satellite missions having the capability for higher frequency and higher spatial resolution observations of coastal ocean dynamics. We examined variability in atmospheric NO (sub 2) over urban nearshore environments in the Eastern US, Europe, and Korea, using a new network of ground-based Pandora spectrometers and Aura-OMI satellite observations. Our measurements in the US and in Europe revealed clear diurnal and day-of-the-week patterns in total column NO (sub 2) (TCNO (sub 2) ), temporal changes as large as 0.8 DU within 4 h, and spatial variability as large as 0.7 DU within an area often covered by just a single OMI pixel. TCNO (sub 2) gradients were considerably stronger over the coastal cities of Korea. With a coarse resolution and an overpass at around 13:30 local time, OMI cannot detect this strong variability in NO (sub 2) , missing pollution peaks from industrial and rush hour activities. Observations were combined with air quality model simulations and radiative transfer calculations to estimate the impact of atmospheric NO (sub 2) variability on satellite retrievals of coastal ocean remote sensing reflectance and biogeochemical variables (i.e., chlorophyll and CDOM). Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Tzortziou, Maria AU - Herman, Jay R AU - Ahmad, Ziauddin AU - Loughner, Christopher P AU - Abuhassan, Nader AU - Cede, Alexander Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 3834 EP - 3854 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 6 SN - 2169-9275, 2169-9275 KW - water quality KW - terrestrial environment KW - sea water KW - pollutants KW - human activity KW - pollution KW - atmosphere KW - nearshore environment KW - satellite methods KW - urban environment KW - transport KW - color KW - atmospheric transport KW - meteorology KW - nitrogen dioxide KW - remote sensing KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623271679?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Atmospheric+NO+%28sub+2%29+dynamics+and+impact+on+ocean+color+retrievals+in+urban+nearshore+regions&rft.au=Tzortziou%2C+Maria%3BHerman%2C+Jay+R%3BAhmad%2C+Ziauddin%3BLoughner%2C+Christopher+P%3BAbuhassan%2C+Nader%3BCede%2C+Alexander&rft.aulast=Tzortziou&rft.aufirst=Maria&rft.date=2014-06-01&rft.volume=119&rft.issue=6&rft.spage=3834&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2014JC009803 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 - 32 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - atmosphere; atmospheric transport; color; human activity; meteorology; nearshore environment; nitrogen dioxide; pollutants; pollution; remote sensing; satellite methods; sea water; terrestrial environment; transport; urban environment; water quality DO - http://dx.doi.org/10.1002/2014JC009803 ER - TY - JOUR T1 - A new stereo topographic map of Io; implications for geology from global to local scales AN - 1618132318; 2014-086499 AB - We use Voyager and Galileo stereo pairs to construct the most complete stereo digital elevation model (DEM) of Io assembled to date, controlled using Galileo limb profiles. Given the difficulty of applying these two techniques to Io due to its anomalous surface albedo properties, we have experimented extensively with the relevant procedures in order to generate what we consider to be the most reliable DEMs. Our final stereo DEM covers approximately 75% of the globe, and we have identified a partial system of longitudinally arranged alternating basins and swells that correlates well to the distribution of mountain and volcano concentrations. We consider the correlation of swells to volcano concentrations and basins to mountain concentrations, to imply a heat flow distribution across Io that is consistent with the asthenospheric tidal heating model of Tackley et al. (2001). The stereo DEM reveals topographic signatures of regional-scale features including Loki Patera, Ra Patera, and the Tvashtar Paterae complex, in addition to previously unrecognized features including an approximately 1000 km diameter depression and a >2000 km long topographic arc comprising mountainous and layered plains material. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - White, Oliver L AU - Schenk, Paul M AU - Nimmo, Francis AU - Hoogenboom, Trudi Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1276 EP - 1301 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 6 SN - 2169-9097, 2169-9097 KW - imagery KW - Galileo Program KW - Tvashtar Paterae KW - Voyager Program KW - Io Satellite KW - mapping KW - Galilean satellites KW - digital terrain models KW - asthenosphere KW - extraterrestrial geology KW - surface features KW - volcanoes KW - stereogrammetry KW - Ra Patera KW - satellites KW - Loki Patera KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618132318?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=A+new+stereo+topographic+map+of+Io%3B+implications+for+geology+from+global+to+local+scales&rft.au=White%2C+Oliver+L%3BSchenk%2C+Paul+M%3BNimmo%2C+Francis%3BHoogenboom%2C+Trudi&rft.aulast=White&rft.aufirst=Oliver&rft.date=2014-06-01&rft.volume=119&rft.issue=6&rft.spage=1276&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004591 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 - 60 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - asthenosphere; digital terrain models; extraterrestrial geology; Galilean satellites; Galileo Program; imagery; Io Satellite; Loki Patera; mapping; Ra Patera; satellites; stereogrammetry; surface features; Tvashtar Paterae; volcanoes; Voyager Program DO - http://dx.doi.org/10.1002/2013JE004591 ER - TY - JOUR T1 - Alteration of the carbon and nitrogen isotopic composition in the Martian surface rocks due to cosmic ray exposure AN - 1618131787; 2014-086504 AB - (super 13) C/ (super 12) C and (super 15) N/ (super 14) N isotopic ratios are pivotal for our understanding of the Martian carbon cycle, history of the Martian atmospheric escape, and origin of the organic compounds on Mars. Here we demonstrate that the carbon and nitrogen isotopic composition of the surface rocks on Mars can be significantly altered by the continuous exposure of Martian surface to cosmic rays. Cosmic rays can effectively produce (super 13) C and (super 15) N isotopes via spallation nuclear reactions on oxygen atoms in various Martian rocks. We calculate that in the top meter of the Martian rocks, the rates of production of both (super 13) C and (super 15) N due to galactic cosmic rays (GCRs) exposure can vary within 1.5-6 atoms/cm (super 3) /s depending on rocks' depth and chemical composition. We also find that the average solar cosmic rays can produce carbon and nitrogen isotopes at a rate comparable to GCRs in the top 5-10 cm of the Martian rocks. We demonstrate that if the total carbon content in a surface Martian rock is <10 ppm, then the "light," potentially "biological" (super 13) C/ (super 12) C ratio would be effectively erased by cosmic rays over 3.5 billion years of exposure. We found that for the rocks with relatively short exposure ages (e.g., 100 million years), cosmogenic changes in (super 15) N/ (super 14) N ratio are still very significant. We also show that a short exposure to cosmic rays of Allan Hills 84001 while on Mars can explain its high-temperature heavy nitrogen isotopic composition ( (super 15) N/ (super 14) N). Applications to Martian meteorites and the current Mars Science Laboratory mission are discussed. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Pavlov, A A AU - Pavlov, A K AU - Ostryakov, V M AU - Vasilyev, G I AU - Mahaffy, P AU - Steele, A Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1390 EP - 1402 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 6 SN - 2169-9097, 2169-9097 KW - alteration KW - volcanic rocks KW - stony meteorites KW - isotopes KW - Martian meteorites KW - igneous rocks KW - Mars KW - exposure age KW - stable isotopes KW - nitrogen KW - meteorites KW - carbon KW - basalts KW - cosmic rays KW - N-15/N-14 KW - isotope ratios KW - C-13/C-12 KW - achondrites KW - geochemical cycle KW - terrestrial planets KW - planets KW - organic compounds KW - Allan Hills Meteorites KW - Antarctica KW - Mars Science Laboratory KW - carbon cycle KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618131787?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Alteration+of+the+carbon+and+nitrogen+isotopic+composition+in+the+Martian+surface+rocks+due+to+cosmic+ray+exposure&rft.au=Pavlov%2C+A+A%3BPavlov%2C+A+K%3BOstryakov%2C+V+M%3BVasilyev%2C+G+I%3BMahaffy%2C+P%3BSteele%2C+A&rft.aulast=Pavlov&rft.aufirst=A&rft.date=2014-06-01&rft.volume=119&rft.issue=6&rft.spage=1390&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2014JE004615 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 - 50 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - achondrites; Allan Hills Meteorites; alteration; Antarctica; basalts; C-13/C-12; carbon; carbon cycle; cosmic rays; exposure age; geochemical cycle; igneous rocks; isotope ratios; isotopes; Mars; Mars Science Laboratory; Martian meteorites; meteorites; N-15/N-14; nitrogen; organic compounds; planets; stable isotopes; stony meteorites; terrestrial planets; volcanic rocks DO - http://dx.doi.org/10.1002/2014JE004615 ER - TY - JOUR T1 - Terrain physical properties derived from orbital data and the first 360 sols of Mars Science Laboratory Curiosity Rover observations in Gale Crater AN - 1618131579; 2014-086501 AB - Physical properties of terrains encountered by the Curiosity rover during the first 360 sols of operations have been inferred from analysis of the scour zones produced by Sky Crane Landing System engine plumes, wheel touch down dynamics, pits produced by Chemical Camera (ChemCam) laser shots, rover wheel traverses over rocks, the extent of sinkage into soils, and the magnitude and sign of rover-based slippage during drives. Results have been integrated with morphologic, mineralogic, and thermophysical properties derived from orbital data, and Curiosity-based measurements, to understand the nature and origin of physical properties of traversed terrains. The hummocky plains (HP) landing site and traverse locations consist of moderately to well-consolidated bedrock of alluvial origin variably covered by slightly cohesive, hard-packed basaltic sand and dust, with both embedded and surface-strewn rock clasts. Rock clasts have been added through local bedrock weathering and impact ejecta emplacement and form a pavement-like surface in which only small clasts (<5 to 10 cm wide) have been pressed into the soil during wheel passages. The bedded fractured (BF) unit, site of Curiosity's first drilling activity, exposes several alluvial-lacustrine bedrock units with little to no soil cover and varying degrees of lithification. Small wheel sinkage values (<1 cm) for both HP and BF surfaces demonstrate that compaction resistance countering driven-wheel thrust has been minimal and that rover slippage while traversing across horizontal surfaces or going uphill, and skid going downhill, have been dominated by terrain tilts and wheel-surface material shear modulus values. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Arvidson, R E AU - Bellutta, P AU - Calef, F J AU - Fraeman, A A AU - Garvin, J B AU - Gasnault, O AU - Grant, J A AU - Grotzinger, J P AU - Hamilton, V E AU - Heverly, M AU - Iagnemma, K A AU - Johnson, J R AU - Lanza, N L AU - Le Mouelic, S AU - Mangold, N AU - Ming, D W AU - Mehta, M AU - Morris, R V AU - Newsom, H E AU - Renno, N AU - Rubin, D AU - Schieber, J AU - Sletten, R AU - Stein, N T AU - Thuillier, F AU - Vasavada, A R AU - Vizcaino, J AU - Wiens, R C Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1322 EP - 1344 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 6 SN - 2169-9097, 2169-9097 KW - impact features KW - techniques KW - Mars KW - landing sites KW - observations KW - Gale Crater KW - terrestrial planets KW - planets KW - physical properties KW - terrains KW - Curiosity Rover KW - Mars Science Laboratory KW - impact craters KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618131579?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Terrain+physical+properties+derived+from+orbital+data+and+the+first+360+sols+of+Mars+Science+Laboratory+Curiosity+Rover+observations+in+Gale+Crater&rft.au=Arvidson%2C+R+E%3BBellutta%2C+P%3BCalef%2C+F+J%3BFraeman%2C+A+A%3BGarvin%2C+J+B%3BGasnault%2C+O%3BGrant%2C+J+A%3BGrotzinger%2C+J+P%3BHamilton%2C+V+E%3BHeverly%2C+M%3BIagnemma%2C+K+A%3BJohnson%2C+J+R%3BLanza%2C+N+L%3BLe+Mouelic%2C+S%3BMangold%2C+N%3BMing%2C+D+W%3BMehta%2C+M%3BMorris%2C+R+V%3BNewsom%2C+H+E%3BRenno%2C+N%3BRubin%2C+D%3BSchieber%2C+J%3BSletten%2C+R%3BStein%2C+N+T%3BThuillier%2C+F%3BVasavada%2C+A+R%3BVizcaino%2C+J%3BWiens%2C+R+C&rft.aulast=Arvidson&rft.aufirst=R&rft.date=2014-06-01&rft.volume=119&rft.issue=6&rft.spage=1322&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004605 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 53 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Curiosity Rover; Gale Crater; impact craters; impact features; instruments; landing sites; Mars; Mars Science Laboratory; observations; physical properties; planets; techniques; terrains; terrestrial planets DO - http://dx.doi.org/10.1002/2013JE004605 ER - TY - JOUR T1 - The Metabolic Cost of an Integrated Exercise Program Performed During 14 Days of Bed Rest AN - 1560120964; 20419339 AB - Background: Exercise countermeasures designed to mitigate muscle atrophy during long-duration spaceflight may not be as effective if crew-members are in negative energy balance (energy output > energy input). This study determined the energy cost of supine exercise (resistance, interval, aerobic) during the spaceflight analogue of bed rest. Methods: Nine subjects (eight men and one woman; 34.5 + or - 8.2 yr) completed 14 d of bed rest and concomitant exercise countermeasures. Body mass and basal metabolic rate (BMR) were assessed before and during bed rest. Exercise energy expenditure was measured during and immediately after [excess post-exercise oxygen consumption (EPOC)] each of five different exercise protocols (30-s, 2-min, and 4-min intervals, continuous aerobic, and a variety of resistance exercises) during bed rest. Results: On days when resistance and continuous aerobic exercise were performed daily, energy expenditure was significantly greater (2879 + or - 280 kcal) than 2-min (2390 + or - 237 kcal), 30-s (2501 + or - 264 kcal), or 4-min (2546 + or - 264 kcal) exercise. There were no significant differences in BMR (prebed rest: 1649 + or - 216 kcal; week 1: 1632 + or - 174 kcal; week 2: 1 657 + or - 176 kcal) or body mass (pre-bed rest: 75.2 + or - 10.1 kg; post-bed rest: 75.2 + or - 9.6 kg). Discussion: These findings highlight the importance of energy balance for long-duration crewmembers completing a high-intensity exercise program with multiple exercise sessions daily. JF - Aviation, Space, and Environmental Medicine AU - Scott, Jessica M AU - Hackney, Kyle AU - Downs, Meghan AU - Guined, Jamie AU - Ploutz-Snyder, Robert AU - Fiedler, James AU - Cunningham, David AU - Ploutz-Snyder, Lori AD - Universities Space Research Association and the NASA Johnson Space Center, Houston, TX, jessica.m.scott@nasa.gov Y1 - 2014/06// PY - 2014 DA - Jun 2014 SP - 612 EP - 617 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 6 SN - 0095-6562, 0095-6562 KW - Physical Education Index; Health & Safety Science Abstracts KW - disuse KW - energy expenditure KW - spaceflight KW - post-exercise oxygen consumption KW - Oxygen consumption KW - Measurement KW - Aerobics KW - Body mass KW - Muscles KW - Energy consumption KW - Resistance exercise KW - Exercise (programs) KW - Energy cost KW - Energy KW - Rest KW - Atrophy KW - Immobilization KW - H 2000:Transportation KW - PE 030:Exercise, Health & Physical Fitness UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560120964?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aphysicaleducation&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=The+Metabolic+Cost+of+an+Integrated+Exercise+Program+Performed+During+14+Days+of+Bed+Rest&rft.au=Scott%2C+Jessica+M%3BHackney%2C+Kyle%3BDowns%2C+Meghan%3BGuined%2C+Jamie%3BPloutz-Snyder%2C+Robert%3BFiedler%2C+James%3BCunningham%2C+David%3BPloutz-Snyder%2C+Lori&rft.aulast=Scott&rft.aufirst=Jessica&rft.date=2014-06-01&rft.volume=85&rft.issue=6&rft.spage=612&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3772.2014 LA - English DB - Physical Education Index; ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 29 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Energy cost; Measurement; Aerobics; Body mass; Rest; Atrophy; Resistance exercise; Exercise (programs); Immobilization; Oxygen consumption; Energy; Muscles; Energy consumption DO - http://dx.doi.org/10.3357/ASEM.3772.2014 ER - TY - JOUR T1 - CMIP5 historical simulations (1850-2012) with GISS ModelE2 AN - 1560104478; 20554338 AB - Observations of climate change during the CMIP5 extended historical period (1850-2012) are compared to trends simulated by six versions of the NASA Goddard Institute for Space Studies ModelE2 Earth System Model. The six models are constructed from three versions of the ModelE2 atmospheric general circulation model, distinguished by their treatment of atmospheric composition and the aerosol indirect effect, combined with two ocean general circulation models, HYCOM and Russell. Forcings that perturb the model climate during the historical period are described. Five-member ensemble averages from each of the six versions of ModelE2 simulate trends of surface air temperature, atmospheric temperature, sea ice and ocean heat content that are in general agreement with observed trends, although simulated warming is slightly excessive within the past decade. Only simulations that include increasing concentrations of long-lived greenhouse gases match the warming observed during the twentieth century. Differences in twentieth-century warming among the six model versions can be attributed to differences in climate sensitivity, aerosol and ozone forcing, and heat uptake by the deep ocean. Coupled models with HYCOM export less heat to the deep ocean, associated with reduced surface warming in regions of deepwater formation, but greater warming elsewhere at high latitudes along with reduced sea ice. All ensembles show twentieth-century annular trends toward reduced surface pressure at southern high latitudes and a poleward shift of the midlatitude westerlies, consistent with observations. Key Points * The model simulates many observed climate trends during the twentieth century * Contrasting warming trends among different model configurations can be related to differences in climate sensitivity, aerosol and ozone forcing, and ocean heat uptake * Total forcing at the end of the CMIP5 historical period is larger than forcing within the previous (CMIP3) version of the model, due to greater greenhouse gas forcing with a smaller aerosol offset JF - Journal of Advances in Modeling Earth Systems AU - Miller, Ron L AU - Schmidt, Gavin A AU - Nazarenko, Larissa S AU - Tausnev, Nick AU - Bauer, Susanne E AU - DelGenio, Anthony D AU - Kelley, Max AU - Lo, Ken K AU - Ruedy, Reto AU - Shindell, Drew T AU - Aleinov, Igor AU - Bauer, Mike AU - Bleck, Rainer AU - Canuto, Vittorio AU - Chen, Yonghua AU - Cheng, Ye AU - Clune, Thomas L AU - Faluvegi, Greg AU - Hansen, James E AU - Healy, Richard J AU - Kiang, Nancy Y AU - Koch, Dorothy AU - Lacis, Andy A AU - LeGrande, Allegra N AU - Lerner, Jean AU - Menon, Surabi AU - Oinas, Valdar AU - Perez Garcia-Pando, Carlos AU - Perlwitz, Jan P AU - Puma, Michael J AU - Rind, David AU - Romanou, Anastasia AU - Russell, Gary L AU - Sato, Makiko AU - Sun, Shan AU - Tsigaridis, Kostas AU - Unger, Nadine AU - Voulgarakis, Apostolos AU - Yao, Mao-Sung AU - Zhang, Jinlun AD - NASA Goddard Institute for Space Studies, New York, New York, USA. Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 441 EP - 477 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 6 IS - 2 SN - 1942-2466, 1942-2466 KW - Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts KW - Historical account KW - Climate change KW - Westerlies KW - Sea ice temperatures KW - Air temperature KW - Surface pressure KW - Exports KW - Climate sensitivity KW - Latitude KW - Atmospheric composition KW - Ozone KW - Sensitivity KW - Aerosols KW - Climate models KW - Simulation KW - Climatic trends KW - Atmosphere-ocean-sea ice coupled models KW - Atmospheric circulation KW - Atmospheric temperature KW - Sea ice KW - Numerical simulations KW - Oceans KW - General circulation models KW - Uptake KW - Temperature trends KW - Greenhouse gases 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/1560104478?accountid=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+Advances+in+Modeling+Earth+Systems&rft.atitle=CMIP5+historical+simulations+%281850-2012%29+with+GISS+ModelE2&rft.au=Miller%2C+Ron+L%3BSchmidt%2C+Gavin+A%3BNazarenko%2C+Larissa+S%3BTausnev%2C+Nick%3BBauer%2C+Susanne+E%3BDelGenio%2C+Anthony+D%3BKelley%2C+Max%3BLo%2C+Ken+K%3BRuedy%2C+Reto%3BShindell%2C+Drew+T%3BAleinov%2C+Igor%3BBauer%2C+Mike%3BBleck%2C+Rainer%3BCanuto%2C+Vittorio%3BChen%2C+Yonghua%3BCheng%2C+Ye%3BClune%2C+Thomas+L%3BFaluvegi%2C+Greg%3BHansen%2C+James+E%3BHealy%2C+Richard+J%3BKiang%2C+Nancy+Y%3BKoch%2C+Dorothy%3BLacis%2C+Andy+A%3BLeGrande%2C+Allegra+N%3BLerner%2C+Jean%3BMenon%2C+Surabi%3BOinas%2C+Valdar%3BPerez+Garcia-Pando%2C+Carlos%3BPerlwitz%2C+Jan+P%3BPuma%2C+Michael+J%3BRind%2C+David%3BRomanou%2C+Anastasia%3BRussell%2C+Gary+L%3BSato%2C+Makiko%3BSun%2C+Shan%3BTsigaridis%2C+Kostas%3BUnger%2C+Nadine%3BVoulgarakis%2C+Apostolos%3BYao%2C+Mao-Sung%3BZhang%2C+Jinlun&rft.aulast=Miller&rft.aufirst=Ron&rft.date=2014-06-01&rft.volume=6&rft.issue=2&rft.spage=441&rft.isbn=&rft.btitle=&rft.title=Journal+of+Advances+in+Modeling+Earth+Systems&rft.issn=19422466&rft_id=info:doi/10.1002%2F2013MS000266 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Climate models; Climate change; Westerlies; Atmosphere-ocean-sea ice coupled models; Climatic trends; Sea ice temperatures; Surface pressure; Sea ice; Numerical simulations; General circulation models; Climate sensitivity; Atmospheric composition; Temperature trends; Greenhouse gases; Historical account; Sensitivity; Aerosols; Simulation; Atmospheric circulation; Atmospheric temperature; Air temperature; Exports; Oceans; Latitude; Uptake; Ozone DO - http://dx.doi.org/10.1002/2013MS000266 ER - TY - JOUR T1 - Energetic particle impact on X-ray imaging with XMM-Newton AN - 1559716750; 20395766 AB - Since energetic protons (100 keV) hinder space-based X-ray imaging, there is a need to characterize the proton environments encountered by a soft X-ray mission when planning missions and operations in the near-Earth environment. Impacts range from enhanced noise in the images to damage to CCD detectors. The high-apogee (17.9 R sub(E)), inclined (40 degree ), and elliptical orbit of European Space Agency's XMM-Newton mission frequently passes through the Earth's Van Allen radiation belts on closed magnetospheric magnetic field lines, the magnetotail lobes on open magnetic field lines, and into the magnetosheath and solar wind on open solar magnetic field lines, four regions with very different energetic proton environments. We use XMM-Newton measurements from 2000 to 2010 to survey the occurrence of proton strikes or "soft proton flares" on the European Photon Imaging Camera pn-junction CCD detector. Proton flares affect 55% of all measurements. Rates vary from 50%at large radial distances in the solar wind and magnetosheath to 25% in the high-latitude magnetotail lobes and increase to 66%of the measurements on closed low-latitude magnetospheric magnetic field lines. Key Points * Energetic protons can cause problems for CCD X-ray imaging * Proton contamination occurs mostly on closed magnetic field lines * On XMM-Newton's orbit, contamination is least likely in the magnetospheric lobes JF - Space Weather AU - Walsh, B M AU - Kuntz, K D AU - Collier, M R AU - Sibeck, D G AU - Snowden, S L AU - Thomas, N E AD - Heliosphysics Division, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Y1 - 2014/06// PY - 2014 DA - Jun 2014 SP - 387 EP - 394 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 12 IS - 6 SN - 1542-7390, 1542-7390 KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - Weather KW - Solar magnetic fields KW - European Space Agency KW - Magnetotail KW - Solar flares KW - Solar wind KW - Acoustic waves KW - X-ray astronomy KW - Noise levels KW - X-ray measurements KW - Particulates KW - Magnetic fields KW - Satellite data KW - Telescopes KW - Radiation KW - Magnetosheath KW - Noise pollution KW - Magnetospheric magnetic field KW - Wind KW - P 7000:NOISE KW - M2 523.62:Solar Wind, Interplanetary Plasma (523.62) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1559716750?accountid=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=Space+Weather&rft.atitle=Energetic+particle+impact+on+X-ray+imaging+with+XMM-Newton&rft.au=Walsh%2C+B+M%3BKuntz%2C+K+D%3BCollier%2C+M+R%3BSibeck%2C+D+G%3BSnowden%2C+S+L%3BThomas%2C+N+E&rft.aulast=Walsh&rft.aufirst=B&rft.date=2014-06-01&rft.volume=12&rft.issue=6&rft.spage=387&rft.isbn=&rft.btitle=&rft.title=Space+Weather&rft.issn=15427390&rft_id=info:doi/10.1002%2F2014SW001046 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Solar magnetic fields; Magnetotail; European Space Agency; Solar wind; Solar flares; Acoustic waves; X-ray astronomy; X-ray measurements; Magnetic fields; Telescopes; Satellite data; Magnetosheath; Noise pollution; Magnetospheric magnetic field; Weather; Radiation; Noise levels; Particulates; Wind DO - http://dx.doi.org/10.1002/2014SW001046 ER - TY - JOUR T1 - Oral histories in meteoritics and planetary science; XXIV, William K. Hartmann AN - 1549617711; 2014-060437 AB - In this interview, William Hartmann (Bill, Fig. 1) describes how he was inspired as a teenager by a map of the Moon in an encyclopedia and by the paintings by Chesley Bonestell. Through the amateur journal "Strolling Astronomer," he shared his interests with other teenagers who became lifelong colleagues. At college, he participated in Project Moonwatch, observing early artificial satellites. In graduate school, under Gerard Kuiper, Bill discovered Mare Orientale and other large concentric lunar basin structures. In the 1960s and 1970s, he used crater densities to study surface ages and erosive/depositional effects, predicted the approximately 3.6 Gyr ages of the lunar maria before the Apollo samples, discovered the intense pre-mare lunar bombardment, deduced the youthful Martian volcanism as part of the Mariner 9 team, and proposed (with Don Davis) the giant impact model for lunar origin. In 1972, he helped found (what is now) the Planetary Science Institute. From the late 1970s to early 1990s, Bill worked mostly with Dale Cruikshank and Dave Tholen at Mauna Kea Observatory, helping to break down the Victorian paradigm that separated comets and asteroids, and determining the approximately 4% albedo of comet nuclei. Most recently, Bill has worked with the imaging teams for several additional Mars missions. He has written three college textbooks and, since the 1970s, after painting illustrations for his textbooks, has devoted part of his time to painting, having had several exhibitions. He has also published two novels. Bill Hartmann won the 2010 Barringer Award for impact studies and the first Carl Sagan Award for outreach in 1997. JF - Meteoritics & Planetary Science AU - Sears, Derek W G Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1119 EP - 1138 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 6 SN - 1086-9379, 1086-9379 KW - asteroids KW - Moon KW - Mare Orientale KW - Mars KW - maria KW - biography KW - lunar craters KW - bibliography KW - terrestrial planets KW - planets KW - Mariner 9 KW - giant impact hypothesis KW - comets KW - crater counts KW - volcanism KW - Mariner Program KW - Hartmann, William K. KW - basins KW - lunar basins KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617711?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Oral+histories+in+meteoritics+and+planetary+science%3B+XXIV%2C+William+K.+Hartmann&rft.au=Sears%2C+Derek+W+G&rft.aulast=Sears&rft.aufirst=Derek+W&rft.date=2014-06-01&rft.volume=49&rft.issue=6&rft.spage=1119&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12298 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 - 2 N1 - PubXState - AR N1 - Document feature - illus. incl. port. N1 - Last updated - 2014-07-31 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - asteroids; basins; bibliography; biography; comets; crater counts; giant impact hypothesis; Hartmann, William K.; lunar basins; lunar craters; Mare Orientale; maria; Mariner 9; Mariner Program; Mars; Moon; planets; terrestrial planets; volcanism DO - http://dx.doi.org/10.1111/maps.12298 ER - TY - JOUR T1 - Reconciliation of halogen-induced ozone loss with the total-column ozone record AN - 1549617374; 2014-060474 JF - Nature Geoscience AU - Shepherd, Theodore G AU - Plummer, D A AU - Scinocca, J F AU - Hegglin, M I AU - Fioletov, V E AU - Reader, M C AU - Remsberg, E AU - von Clarmann, T AU - Wang, H J Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 443 EP - 449 PB - Nature Publishing Group, London VL - 7 IS - 6 SN - 1752-0894, 1752-0894 KW - halogens KW - ecosystems KW - troposphere KW - simulation KW - climate change KW - remediation KW - air pollution KW - atmospheric circulation KW - ozone KW - stratosphere KW - denitrification KW - meteorology KW - clouds KW - chlorine KW - time series analysis KW - human activity KW - Arctic region KW - statistical analysis KW - pollution KW - atmosphere KW - South Pole KW - gases KW - ozone hole KW - Antarctica KW - North Pole KW - eruptions KW - aerosols KW - air KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617374?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Reconciliation+of+halogen-induced+ozone+loss+with+the+total-column+ozone+record&rft.au=Shepherd%2C+Theodore+G%3BPlummer%2C+D+A%3BScinocca%2C+J+F%3BHegglin%2C+M+I%3BFioletov%2C+V+E%3BReader%2C+M+C%3BRemsberg%2C+E%3Bvon+Clarmann%2C+T%3BWang%2C+H+J&rft.aulast=Shepherd&rft.aufirst=Theodore&rft.date=2014-06-01&rft.volume=7&rft.issue=6&rft.spage=443&rft.isbn=&rft.btitle=&rft.title=Nature+Geoscience&rft.issn=17520894&rft_id=info:doi/10.1038%2FNGEO2155 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 - 49 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-07-31 N1 - SubjectsTermNotLitGenreText - aerosols; air; air pollution; Antarctica; Arctic region; atmosphere; atmospheric circulation; chlorine; climate change; clouds; denitrification; ecosystems; eruptions; gases; halogens; human activity; meteorology; North Pole; ozone; ozone hole; pollution; remediation; simulation; South Pole; statistical analysis; stratosphere; time series analysis; troposphere DO - http://dx.doi.org/10.1038/NGEO2155 ER - TY - JOUR T1 - On the Role of SST Forcing in the 2011 and 2012 Extreme U.S. Heat and Drought: A Study in Contrasts AN - 1547866108; 20112368 AB - This study compares the extreme heat and drought that developed over the United States in 2011 and 2012 with a focus on the role of sea surface temperature (SST) forcing. Experiments with the NASA Goddard Earth Observing System, version 5 (GEOS-5), atmospheric general circulation model show that the winter/spring response over the United States to the Pacific SST is remarkably similar for the two years despite substantial differences in the tropical Pacific SST. As such, the pronounced winter and early spring temperature differences between the two years (warmth confined to the south in 2011 and covering much of the continent in 2012) primarily reflect differences in the contributions from the Atlantic and Indian Oceans, with both acting to cool the east and upper Midwest during 2011, while during 2012 the Indian Ocean reinforced the Pacific-driven, continental-wide warming and the Atlantic played a less important role. During late spring and summer of 2011, the tropical Pacific SST forced a continued warming and drying over the southern United States, though considerably weaker than observed. Nevertheless, the observed 2011 anomalies fall well within the models intraensemble spread. In contrast, the observed rapid development of intense heat and drying over the central United States during June and July 2012 falls on the margins of the models intraensemble spread, with the response to the SST giving little indication that 2012 would produce record-breaking precipitation deficits and heat. A diagnosis of the 2012 observed circulation anomalies shows that the most extreme heat and drought was tied to the development of a stationary Rossby wave and an associated anomalous upper-tropospheric high maintained by weather transients. JF - Journal of Hydrometeorology AU - Wang, Hailan AU - Schubert, Siegfried AU - Koster, Randal AU - Ham, Yoo-Geun AU - Suarez, Max AD - Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, Maryland, and Science Systems and Applications, Inc., Hampton, Virginia Y1 - 2014/06// PY - 2014 DA - Jun 2014 SP - 1255 EP - 1273 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 15 IS - 3 SN - 1525-755X, 1525-755X KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - Meteorological data KW - Sea surface KW - Drought KW - IS, Tropical Pacific KW - Stationary Rossby waves KW - Sea surface temperature anomalies KW - Sea surface temperatures KW - Droughts KW - Marine KW - ISW, Indian Ocean KW - Weather KW - Planetary waves KW - Temperature KW - Drying KW - Freak waves KW - Atmospheric circulation KW - Precipitation KW - Extreme values KW - Temperature differences KW - Model Studies KW - Surface temperature KW - Hydrometeorology KW - USA KW - Hydrometeorological research KW - Heat KW - Oceans KW - General circulation models KW - Q2 09243:Structure, mechanics and thermodynamics KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - M2 551.465:Structure/Dynamics/Circulation (551.465) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1547866108?accountid=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+Hydrometeorology&rft.atitle=On+the+Role+of+SST+Forcing+in+the+2011+and+2012+Extreme+U.S.+Heat+and+Drought%3A+A+Study+in+Contrasts&rft.au=Wang%2C+Hailan%3BSchubert%2C+Siegfried%3BKoster%2C+Randal%3BHam%2C+Yoo-Geun%3BSuarez%2C+Max&rft.aulast=Wang&rft.aufirst=Hailan&rft.date=2014-06-01&rft.volume=15&rft.issue=3&rft.spage=1255&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1175%2FJHM-D-13-069.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-07-01 N1 - Number of references - 48 N1 - Last updated - 2014-12-11 N1 - SubjectsTermNotLitGenreText - Sea surface; Planetary waves; Drying; Atmospheric circulation; Temperature differences; Extreme values; Droughts; Surface temperature; Meteorological data; Stationary Rossby waves; Hydrometeorological research; Sea surface temperature anomalies; General circulation models; Freak waves; Precipitation; Drought; Sea surface temperatures; Hydrometeorology; Weather; Heat; Oceans; Temperature; Model Studies; ISW, Indian Ocean; USA; IS, Tropical Pacific; Marine DO - http://dx.doi.org/10.1175/JHM-D-13-069.1 ER - TY - JOUR T1 - Chance and necessity in biochemistry; implications for the search for extraterrestrial biomarkers in Earth-like environments AN - 1545408562; 2014-055629 AB - In this paper, we examine a restricted subset of the question of possible alien biochemistries. That is, we look into how different life might be if it emerged in environments similar to that required for life on Earth. We advocate a principle of chance and necessity in biochemistry. According to this principle, biochemistry is in some fundamental way the sum of two processes: there is an aspect of biochemistry that is an endowment from prebiotic processes, which represents the necessity, plus an aspect that is invented by the process of evolution, which represents the chance. As a result, we predict that life originating in extraterrestrial Earth-like environments will share biochemical motifs that can be traced back to the prebiotic world but will also have intrinsic biochemical traits that are unlikely to be duplicated elsewhere as they are combinatorially path-dependent. Effective and objective strategies to search for biomarkers, and evidence for a second genesis, on planets with Earth-like environments can be built based on this principle. JF - Astrobiology AU - Davila, Alfonso F AU - McKay, Christopher P Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 534 EP - 540 PB - Mary Ann Liebert, Larchmont, NY VL - 14 IS - 6 SN - 1531-1074, 1531-1074 KW - icy satellites KW - Europa Satellite KW - biochemistry KW - prebiotic chemistry KW - astrobiology KW - Mars KW - Galilean satellites KW - biomarkers KW - life origin KW - terrestrial planets KW - planets KW - meteorites KW - organic compounds KW - organic acids KW - nucleic acids KW - RNA KW - amino acids KW - DNA KW - Enceladus Satellite KW - satellites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545408562?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Astrobiology&rft.atitle=Chance+and+necessity+in+biochemistry%3B+implications+for+the+search+for+extraterrestrial+biomarkers+in+Earth-like+environments&rft.au=Davila%2C+Alfonso+F%3BMcKay%2C+Christopher+P&rft.aulast=Davila&rft.aufirst=Alfonso&rft.date=2014-06-01&rft.volume=14&rft.issue=6&rft.spage=534&rft.isbn=&rft.btitle=&rft.title=Astrobiology&rft.issn=15311074&rft_id=info:doi/10.1089%2Fast.2014.1150 L2 - http://www.liebertpub.com/publication.aspx?pub_id=99 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 - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-07-17 N1 - SubjectsTermNotLitGenreText - amino acids; astrobiology; biochemistry; biomarkers; DNA; Enceladus Satellite; Europa Satellite; Galilean satellites; icy satellites; life origin; Mars; meteorites; nucleic acids; organic acids; organic compounds; planets; prebiotic chemistry; RNA; satellites; terrestrial planets DO - http://dx.doi.org/10.1089/ast.2014.1150 ER - TY - JOUR T1 - Field demonstration of an instrument performing automatic classification of geologic surfaces AN - 1545408487; 2014-055626 AB - This work presents a method with which to automate simple aspects of geologic image analysis during space exploration. Automated image analysis on board the spacecraft can make operations more efficient by generating compressed maps of long traverses for summary downlink. It can also enable immediate automatic responses to science targets of opportunity, improving the quality of targeted measurements collected with each command cycle. In addition, automated analyses on Earth can process large image catalogs, such as the growing database of Mars surface images, permitting more timely and quantitative summaries that inform tactical mission operations. We present TextureCam, a new instrument that incorporates real-time image analysis to produce texture-sensitive classifications of geologic surfaces in mesoscale scenes. A series of tests at the Cima Volcanic Field in the Mojave Desert, California, demonstrated mesoscale surficial mapping at two distinct sites of geologic interest. JF - Astrobiology AU - Bekker, Dmitriy L AU - Thompson, David R AU - Abbey, William J AU - Cabrol, Nathalie A AU - Francis, Raymond AU - Manatt, Ken S AU - Ortega, Kevin F AU - Wagstaff, Kiri L Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 486 EP - 501 PB - Mary Ann Liebert, Larchmont, NY VL - 14 IS - 6 SN - 1531-1074, 1531-1074 KW - United States KW - textures KW - data acquisition KW - surficial geology KW - Mars KW - mapping KW - landforms KW - automated analysis KW - terrestrial planets KW - California KW - planets KW - topography KW - TextureCam instrument KW - Mojave Desert KW - classification KW - Cima volcanic field KW - San Bernardino County California KW - instruments KW - image analysis KW - real-time methods KW - field studies KW - 23:Geomorphology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545408487?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Astrobiology&rft.atitle=Field+demonstration+of+an+instrument+performing+automatic+classification+of+geologic+surfaces&rft.au=Bekker%2C+Dmitriy+L%3BThompson%2C+David+R%3BAbbey%2C+William+J%3BCabrol%2C+Nathalie+A%3BFrancis%2C+Raymond%3BManatt%2C+Ken+S%3BOrtega%2C+Kevin+F%3BWagstaff%2C+Kiri+L&rft.aulast=Sappington&rft.aufirst=Brenda+Kaye&rft.date=1995-01-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+relationship+between+discrimination+reversal+learning+and+performance+tasks+in+yearling+and+two-year-old+horses&rft.issn=&rft_id=info:doi/ L2 - http://www.liebertpub.com/publication.aspx?pub_id=99 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 32 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-07-17 N1 - SubjectsTermNotLitGenreText - automated analysis; California; Cima volcanic field; classification; data acquisition; field studies; image analysis; instruments; landforms; mapping; Mars; Mojave Desert; planets; real-time methods; San Bernardino County California; surficial geology; terrestrial planets; TextureCam instrument; textures; topography; United States DO - http://dx.doi.org/10.1089/ast.2014.1172 ER - TY - JOUR T1 - Production and early preservation of lipid biomarkers in iron hot springs AN - 1545408012; 2014-055627 AB - The bicarbonate-buffered anoxic vent waters at Chocolate Pots hot springs in Yellowstone National Park are 51-54 degrees C, pH 5.5-6.0, and are very high in dissolved Fe(II) at 5.8-5.9 mg/L. The aqueous Fe(II) is oxidized by a combination of biotic and abiotic mechanisms and precipitated as primary siliceous nanophase iron oxyhydroxides (ferrihydrite). Four distinct prokaryotic photosynthetic microbial mat types grow on top of these iron deposits. Lipids were used to characterize the community composition of the microbial mats, link source organisms to geologically significant biomarkers, and investigate how iron mineralization degrades the lipid signature of the community. The phospholipid and glycolipid fatty acid profiles of the highest-temperature mats indicate that they are dominated by cyanobacteria and green nonsulfur filamentous anoxygenic phototrophs (FAPs). Diagnostic lipid biomarkers of the cyanobacteria include midchain branched mono- and dimethylalkanes and, most notably, 2-methylbacteriohopanepolyol. Diagnostic lipid biomarkers of the FAPs (Chloroflexus and Roseiflexus spp.) include wax esters and a long-chain tri-unsaturated alkene. Surprisingly, the lipid biomarkers resisted the earliest stages of microbial degradation and diagenesis to survive in the iron oxides beneath the mats. Understanding the potential of particular sedimentary environments to capture and preserve fossil biosignatures is of vital importance in the selection of the best landing sites for future astrobiological missions to Mars. This study explores the nature of organic degradation processes in moderately thermal Fe(II)-rich groundwater springs-environmental conditions that have been previously identified as highly relevant for Mars exploration. JF - Astrobiology AU - Parenteau, Mary N AU - Jahnke, Linda L AU - Farmer, Jack D AU - Cady, Sherry L Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 502 EP - 521 PB - Mary Ann Liebert, Larchmont, NY VL - 14 IS - 6 SN - 1531-1074, 1531-1074 KW - United States KW - degradation KW - iron oxides KW - fatty acids KW - X-ray diffraction data KW - lipids KW - gas chromatograms KW - aliphatic hydrocarbons KW - microbial mats KW - Mars KW - iron KW - temperature KW - alkenes KW - Yellowstone National Park KW - waxes KW - carboxylic acids KW - springs KW - oxides KW - mineralization KW - sedimentary structures KW - pH KW - esters KW - cyanobacteria KW - biogenic structures KW - alkanes KW - ferrihydrite KW - biomarkers KW - thermal waters KW - ferrous iron KW - terrestrial planets KW - planets KW - organic compounds KW - organic acids KW - metals KW - diagenesis KW - chromatograms KW - hydrocarbons KW - hot springs KW - preservation KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545408012?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Astrobiology&rft.atitle=Production+and+early+preservation+of+lipid+biomarkers+in+iron+hot+springs&rft.au=Parenteau%2C+Mary+N%3BJahnke%2C+Linda+L%3BFarmer%2C+Jack+D%3BCady%2C+Sherry+L&rft.aulast=Parenteau&rft.aufirst=Mary&rft.date=2014-06-01&rft.volume=14&rft.issue=6&rft.spage=502&rft.isbn=&rft.btitle=&rft.title=Astrobiology&rft.issn=15311074&rft_id=info:doi/10.1089%2Fast.2013.1122 L2 - http://www.liebertpub.com/publication.aspx?pub_id=99 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 136 N1 - PubXState - NY N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2014-07-17 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; alkenes; biogenic structures; biomarkers; carboxylic acids; chromatograms; cyanobacteria; degradation; diagenesis; esters; fatty acids; ferrihydrite; ferrous iron; gas chromatograms; hot springs; hydrocarbons; iron; iron oxides; lipids; Mars; metals; microbial mats; mineralization; organic acids; organic compounds; oxides; pH; planets; preservation; sedimentary structures; springs; temperature; terrestrial planets; thermal waters; United States; waxes; X-ray diffraction data; Yellowstone National Park DO - http://dx.doi.org/10.1089/ast.2013.1122 ER - TY - JOUR T1 - Organic matter on the Earth's Moon AN - 1545407686; 2014-055472 AB - Carbonaceous matter on the surfaces of black pyroclastic beads, collected from Shorty crater during the Apollo 17 mission, represents the first identification of complex organic material associated with any lunar sample. We report the chemical, physical and isotopic properties of this organic matter that together support a pre-terrestrial origin. We suggest the most probable source is through the accretion of exogenous meteoritic kerogen from micrometeorite impacts into the lunar regolith. Abiotic organic matter has been continuously delivered to the surfaces of the terrestrial planets and their moons by accretion of asteroidal and cometary material. Determining the nature, distribution and evolution of such matter in the lunar regolith has important implications for understanding the prebiotic chemical inventory of the terrestrial planets. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Thomas-Keprta, Kathie L AU - Clemett, Simon J AU - Messenger, Scott AU - Ross, Daniel K AU - Le, Loan AU - Rahman, Zia AU - McKay, David S AU - Gibson, Everett K, Jr AU - Gonzalez, Carla AU - Peabody, William Y1 - 2014/06/01/ PY - 2014 DA - 2014 Jun 01 SP - 1 EP - 15 PB - Elsevier, New York, NY VL - 134 SN - 0016-7037, 0016-7037 KW - volcanic rocks KW - ion probe data KW - asteroids KW - isotopes KW - igneous rocks KW - thermal ionization mass spectra KW - mass spectra KW - meteorites KW - chemical properties KW - spectra KW - satellites KW - chemical composition KW - carbonaceous composition KW - solar system KW - accretion KW - Moon KW - biochemistry KW - cosmochemistry KW - X-ray spectra KW - TEM data KW - EDS spectra KW - terrestrial planets KW - pyroclastics KW - planets KW - physical properties KW - organic compounds KW - lunar samples KW - Raman spectra KW - comets KW - mathematical methods KW - SEM data KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545407686?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Organic+matter+on+the+Earth%27s+Moon&rft.au=Thomas-Keprta%2C+Kathie+L%3BClemett%2C+Simon+J%3BMessenger%2C+Scott%3BRoss%2C+Daniel+K%3BLe%2C+Loan%3BRahman%2C+Zia%3BMcKay%2C+David+S%3BGibson%2C+Everett+K%2C+Jr%3BGonzalez%2C+Carla%3BPeabody%2C+William&rft.aulast=Thomas-Keprta&rft.aufirst=Kathie&rft.date=2014-06-01&rft.volume=134&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.02.047 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 68 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-07-17 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - accretion; asteroids; biochemistry; carbonaceous composition; chemical composition; chemical properties; comets; cosmochemistry; EDS spectra; igneous rocks; ion probe data; isotopes; lunar samples; mass spectra; mathematical methods; meteorites; Moon; organic compounds; physical properties; planets; pyroclastics; Raman spectra; regolith; satellites; SEM data; solar system; spectra; TEM data; terrestrial planets; thermal ionization mass spectra; volcanic rocks; X-ray spectra DO - http://dx.doi.org/10.1016/j.gca.2014.02.047 ER - TY - JOUR T1 - Assessing Impacts of Integrating MODIS Vegetation Data in the Weather Research and Forecasting (WRF) Model Coupled to Two Different Canopy-Resistance Approaches AN - 1544018735; 20181305 AB - The impact of 8-day-averaged data from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensornamely, the 1-km leaf area index, absorbed photosynthetic radiation, and land-use datais investigated for use in the Weather Research and Forecasting (WRF) model for regional weather prediction. These high-resolution, near-real-time MODIS data are hypothesized to enhance the representation of land-atmosphere interactions and to potentially improve the WRF model forecast skill for temperature, surface moisture, surface fluxes, and soil temperature. To test this hypothesis, the impact of using MODIS-based land surface data on surface energy and water budgets was assessed within the Noah land surface model with two different canopy-resistance schemes. An ensemble of six model experiments was conducted using the WRF model for a typical summertime episode over the U.S. southern Great Plains that occurred during the International H2O Project (IHOP_2002) field experiment. The six model experiments were statistically analyzed and showed some degree of improvement in surface latent heat flux and sensible heat flux, as well as surface temperature and moisture, after land use, leaf area index, and green vegetation fraction data were replaced by remotely sensed data. There was also an improvement in the WRF-simulated temperature and boundary layer moisture with MODIS data in comparison with the default U.S. Geological Survey land-use and leaf area index inputs. Overall, analysis suggests that recalibration and improvements to both the input data and the land model help to improve estimation of surface and soil parameters and boundary layer moisture and led to improvement in simulating convection in WRF runs. Incorporating updated land conditions provided the most notable improvements, and the mesoscale model performance could be further enhanced when improved land surface schemes become available. JF - Journal of Applied Meteorology and Climatology AU - Kumar, Anil AU - Chen, Fei AU - Barlage, Michael AU - Ek, Michael B AU - Niyogi, Dev AD - NASA Goddard Space Flight Center, Greenbelt, and Earth System Science Interdisciplinary Center, College Park, Maryland, and Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, Indiana Y1 - 2014/06// PY - 2014 DA - Jun 2014 SP - 1362 EP - 1380 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 53 IS - 6 SN - 1558-8424, 1558-8424 KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts; Sustainability Science Abstracts KW - Prediction KW - Surface temperatures KW - Photosynthesis KW - Water budget KW - Statistical analysis KW - Convection development KW - Soil KW - Climate and vegetation KW - Radiation KW - Surface fluxes KW - Meteorology KW - Climatology KW - MODIS (Moderate Resolution Imaging Spectrometer) KW - Sensible heat flux KW - Sensible heat KW - Weather KW - Soil temperatures KW - Temperature KW - Vegetation KW - Land use KW - Satellite data KW - Energy KW - Boundary layers KW - Geological surveys KW - Mesoscale models KW - Latent heat flux KW - ENA 03:Energy KW - M3 1010:Issues in Sustainable Development KW - M2 551.509.1/.5:Forecasting (551.509.1/.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1544018735?accountid=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+Applied+Meteorology+and+Climatology&rft.atitle=Assessing+Impacts+of+Integrating+MODIS+Vegetation+Data+in+the+Weather+Research+and+Forecasting+%28WRF%29+Model+Coupled+to+Two+Different+Canopy-Resistance+Approaches&rft.au=Kumar%2C+Anil%3BChen%2C+Fei%3BBarlage%2C+Michael%3BEk%2C+Michael+B%3BNiyogi%2C+Dev&rft.aulast=Kumar&rft.aufirst=Anil&rft.date=2014-06-01&rft.volume=53&rft.issue=6&rft.spage=1362&rft.isbn=&rft.btitle=&rft.title=Journal+of+Applied+Meteorology+and+Climatology&rft.issn=15588424&rft_id=info:doi/10.1175%2FJAMC-D-13-0247.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-07-01 N1 - Number of references - 74 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Surface temperatures; Soil temperatures; Statistical analysis; Convection development; Land use; Climate and vegetation; Satellite data; Radiation; Surface fluxes; MODIS (Moderate Resolution Imaging Spectrometer); Climatology; Mesoscale models; Latent heat flux; Sensible heat flux; Prediction; Weather; Photosynthesis; Water budget; Temperature; Vegetation; Soil; Boundary layers; Energy; Geological surveys; Meteorology; Sensible heat DO - http://dx.doi.org/10.1175/JAMC-D-13-0247.1 ER - TY - JOUR T1 - Status of turbulence modeling for hypersonic propulsion flowpaths AN - 1541443249; 19861550 AB - This report provides an assessment of current turbulent flow calculation methods for hypersonic propulsion flowpaths, particularly the scramjet engine. Emphasis is placed on Reynolds-averaged Navier-Stokes (RANS) methods, but some discussion of newer methods such as large eddy simulation (LES) is also provided. The report is organized by considering technical issues throughout the scramjet-powered vehicle flowpath, including laminar-to-turbulent boundary layer transition, shock wave/turbulent boundary layer interactions, scalar transport modeling (specifically the significance of turbulent Prandtl and Schmidt numbers), and compressible mixing. Unit problems are primarily used to conduct the assessment. In the combustor, results from calculations of a direct connect supersonic combustion experiment are also used to address the effects of turbulence model selection and in particular settings for the turbulent Prandtl and Schmidt numbers. It is concluded that RANS turbulence modeling shortfalls are still a major limitation to the accuracy of hypersonic propulsion simulations, whether considering individual components or an overall system. Newer methods such as LES-based techniques may be promising, but are not yet at a maturity to be used routinely by the hypersonic propulsion community. The need for fundamental experiments to provide data for turbulence model development and validation is discussed. JF - Theoretical and Computational Fluid Dynamics AU - Georgiadis, Nicholas J AU - Yoder, Dennis A AU - Vyas, Manan A AU - Engblom, William A AD - NASA Glenn Research Center, Cleveland, OH, 44135, USA, georgiadis@nasa.gov Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 295 EP - 318 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 28 IS - 3 SN - 0935-4964, 0935-4964 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Marine KW - Turbulent flow KW - Turbulent Flow KW - Hydrodynamics KW - Boundary Layers KW - Oceanic eddies KW - turbulence KW - Mixing KW - Model Studies KW - Wave interactions KW - Eddies KW - Assessments KW - Boundary layers KW - Fluid dynamics KW - Waves KW - Turbulent boundary layer KW - Turbulence KW - Modelling KW - SW 5010:Network design KW - Q2 09183:Physics and chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1541443249?accountid=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=Theoretical+and+Computational+Fluid+Dynamics&rft.atitle=Status+of+turbulence+modeling+for+hypersonic+propulsion+flowpaths&rft.au=Georgiadis%2C+Nicholas+J%3BYoder%2C+Dennis+A%3BVyas%2C+Manan+A%3BEngblom%2C+William+A&rft.aulast=Georgiadis&rft.aufirst=Nicholas&rft.date=2014-06-01&rft.volume=28&rft.issue=3&rft.spage=295&rft.isbn=&rft.btitle=&rft.title=Theoretical+and+Computational+Fluid+Dynamics&rft.issn=09354964&rft_id=info:doi/10.1007%2Fs00162-013-0316-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Number of references - 88 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Turbulent flow; Boundary layers; Fluid dynamics; Oceanic eddies; Turbulence; Turbulent boundary layer; Modelling; Wave interactions; Eddies; Turbulent Flow; Hydrodynamics; Assessments; Boundary Layers; Waves; turbulence; Mixing; Model Studies; Marine DO - http://dx.doi.org/10.1007/s00162-013-0316-z ER - TY - JOUR T1 - Characteristics of Precipitation Features and Annual Rainfall during the TRMM Era in the Central Andes AN - 1540238856; 20089539 AB - The central Andes extends from 7DG to 21DGS, with its eastern boundary defined by elevation (1000 m and greater) and its western boundary by the coastline. The authors used a combination of surface observations, reanalysis, and the University of Utah Tropical Rainfall Measuring Mission (TRMM) precipitation features (PF) database to understand the characteristics of convective systems and associated rainfall in the central Andes during the TRMM era, 1998-2012. Compared to other dry (West Africa), mountainous (Himalayas), and dynamically linked (Amazon) regions in the tropics, the central Andes PF population was distinct from these other regions, with small and weak PFs dominating its cumulative distribution functions and annual rainfall totals. No more than 10% of PFs in the central Andes met any of the thresholds used to identify and define deep convection (minimum IR cloud-top temperatures, minimum 85-GHz brightness temperature, maximum height of the 40-dBZ echo). For most of the PFs, available moisture was limited (<35 mm) and instability low (<500 J kg super(-1)). The central Andes represents a largely stable, dry to arid environment, limiting system development and organization. Hence, primarily short-duration events (<60 min) characterized by shallow convection and light to lightmoderate rainfall rates (0.54.0 mm h super(-1)) were found. JF - Journal of Climate AU - Mohr, Karen I AU - Slayback, Daniel AU - Yager, Karina AD - Mesoscale Atmospheric Processes Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 3982 EP - 4001 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 27 IS - 11 SN - 0894-8755, 0894-8755 KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Convection KW - Rainfall KW - Arid environments KW - Pakistan, Himalayas KW - South America, Andes Mts. KW - Convection development KW - Convective systems KW - Data reanalysis KW - Surface radiation temperature KW - Rainfall Rate KW - Annual Distribution KW - USA, Utah KW - Annual rainfall KW - Climates KW - Climate KW - Temperature KW - Precipitation KW - Clouds KW - Dominant species KW - ASE, Africa KW - South America, Amazon R. KW - Elevation KW - Boundaries KW - Tropical Rainfall Measuring Mission (TRMM) KW - Brightness temperature KW - Instability KW - Q2 09148:Palaeo-studies KW - SW 5010:Network design KW - M2 551.58:Climatology (551.58) KW - AQ 00003:Monitoring and Analysis of Water and Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1540238856?accountid=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=Characteristics+of+Precipitation+Features+and+Annual+Rainfall+during+the+TRMM+Era+in+the+Central+Andes&rft.au=Mohr%2C+Karen+I%3BSlayback%2C+Daniel%3BYager%2C+Karina&rft.aulast=Mohr&rft.aufirst=Karen&rft.date=2014-06-01&rft.volume=27&rft.issue=11&rft.spage=3982&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-13-00592.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 70 N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Convection; Dominant species; Rainfall; Climate; Arid environments; Surface radiation temperature; Clouds; Annual rainfall; Tropical Rainfall Measuring Mission (TRMM); Brightness temperature; Convection development; Convective systems; Precipitation; Instability; Data reanalysis; Rainfall Rate; Elevation; Climates; Temperature; Boundaries; Annual Distribution; USA, Utah; ASE, Africa; South America, Amazon R.; Pakistan, Himalayas; South America, Andes Mts. DO - http://dx.doi.org/10.1175/JCLI-D-13-00592.1 ER - TY - JOUR T1 - High-resolution local gravity model of the south pole of the Moon from GRAIL extended mission data AN - 1560086611; 2014-066110 AB - We estimated a high-resolution local gravity field model over the south pole of the Moon using data from the Gravity Recovery and Interior Laboratory's extended mission. Our solution consists of adjustments with respect to a global model expressed in spherical harmonics. The adjustments are expressed as gridded gravity anomalies with a resolution of 1/6 degrees by 1/6 degrees (equivalent to that of a degree and order 1080 model in spherical harmonics), covering a cap over the south pole with a radius of 40 degrees . The gravity anomalies have been estimated from a short-arc analysis using only Ka-band range-rate (KBRR) data over the area of interest. We apply a neighbor-smoothing constraint to our solution. Our local model removes striping present in the global model; it reduces the misfit to the KBRR data and improves correlations with topography to higher degrees than current global models. Abstract Copyright (2014), . The Authors. JF - Geophysical Research Letters AU - Goossens, Sander AU - Sabaka, Terence J AU - Nicholas, Joseph B AU - Lemoine, Frank G AU - Rowlands, David D AU - Mazarico, Erwan AU - Neumann, Gregory A AU - Smith, David E AU - Zuber, Maria T Y1 - 2014/05/28/ PY - 2014 DA - 2014 May 28 SP - 3367 EP - 3374 PB - American Geophysical Union, Washington, DC VL - 41 IS - 10 SN - 0094-8276, 0094-8276 KW - models KW - high-resolution methods KW - gravity anomalies KW - polar regions KW - gravity field KW - topography KW - Moon KW - GRAIL Mission KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560086611?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=High-resolution+local+gravity+model+of+the+south+pole+of+the+Moon+from+GRAIL+extended+mission+data&rft.au=Goossens%2C+Sander%3BSabaka%2C+Terence+J%3BNicholas%2C+Joseph+B%3BLemoine%2C+Frank+G%3BRowlands%2C+David+D%3BMazarico%2C+Erwan%3BNeumann%2C+Gregory+A%3BSmith%2C+David+E%3BZuber%2C+Maria+T&rft.aulast=Goossens&rft.aufirst=Sander&rft.date=2014-05-28&rft.volume=41&rft.issue=10&rft.spage=3367&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL060178 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 40 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-09-05 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - GRAIL Mission; gravity anomalies; gravity field; high-resolution methods; models; Moon; polar regions; topography DO - http://dx.doi.org/10.1002/2014GL060178 ER - TY - JOUR T1 - GRGM900C; a degree 900 lunar gravity model from GRAIL primary and extended mission data AN - 1560085743; 2014-066111 AB - We have derived a gravity field solution in spherical harmonics to degree and order 900, GRGM900C, from the tracking data of the Gravity Recovery and Interior Laboratory (GRAIL) Primary (1 March to 29 May 2012) and Extended Missions (30 August to 14 December 2012). A power law constraint of 3.6 X10 (super -4) /l (super 2) was applied only for degree l greater than 600. The model produces global correlations of gravity, and gravity predicted from lunar topography of > or = 0.98 through degree 638. The model's degree strength varies from a minimum of 575-675 over the central nearside and farside to 900 over the polar regions. The model fits the Extended Mission Ka-Band Range Rate data through 17 November 2012 at 0.13 mu m/s RMS, whereas the last month of Ka-Band Range-Rate data obtained from altitudes of 2-10 km fit at 0.98 mu m/s RMS, indicating that there is still signal inherent in the tracking data beyond degree 900. Abstract Copyright (2014), . The Authors. JF - Geophysical Research Letters AU - Lemoine, Frank G AU - Goossens, Sander AU - Sabaka, Terence J AU - Nicholas, Joseph B AU - Mazarico, Erwan AU - Rowlands, David D AU - Loomis, Bryant D AU - Chinn, Douglas S AU - Neumann, Gregory A AU - Smith, David E AU - Zuber, Maria T Y1 - 2014/05/28/ PY - 2014 DA - 2014 May 28 SP - 3382 EP - 3389 PB - American Geophysical Union, Washington, DC VL - 41 IS - 10 SN - 0094-8276, 0094-8276 KW - spherical harmonic analysis KW - models KW - gravity anomalies KW - polar regions KW - gravity field KW - topography KW - Moon KW - mathematical methods KW - GRAIL Mission KW - information management KW - data management KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560085743?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=GRGM900C%3B+a+degree+900+lunar+gravity+model+from+GRAIL+primary+and+extended+mission+data&rft.au=Lemoine%2C+Frank+G%3BGoossens%2C+Sander%3BSabaka%2C+Terence+J%3BNicholas%2C+Joseph+B%3BMazarico%2C+Erwan%3BRowlands%2C+David+D%3BLoomis%2C+Bryant+D%3BChinn%2C+Douglas+S%3BNeumann%2C+Gregory+A%3BSmith%2C+David+E%3BZuber%2C+Maria+T&rft.aulast=Lemoine&rft.aufirst=Frank&rft.date=2014-05-28&rft.volume=41&rft.issue=10&rft.spage=3382&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL060027 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 36 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-09-05 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - data management; GRAIL Mission; gravity anomalies; gravity field; information management; mathematical methods; models; Moon; polar regions; spherical harmonic analysis; topography DO - http://dx.doi.org/10.1002/2014GL060027 ER - TY - NEWS T1 - Langley Lends Dream Chaser Team Expertise AN - 1526536113 JF - UPI Space Daily AU - Sasha Congiu for Langley Research Center Y1 - 2014/05/21/ PY - 2014 DA - 2014 May 21 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1526536113?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Langley+Lends+Dream+Chaser+Team+Expertise&rft.au=Sasha+Congiu+for+Langley+Research+Center&rft.aulast=Sasha+Congiu+for+Langley+Research+Center&rft.aufirst=&rft.date=2014-05-21&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-05-22 ER - TY - JOUR T1 - DISCOVERY OF FINELY STRUCTURED DYNAMIC SOLAR CORONA OBSERVED IN THE Hi-C TELESCOPE AN - 1664206189; PQ0001216061 AB - In the Summer of 2012, the High-resolution Coronal Imager (Hi-C) flew on board a NASA sounding rocket and collected the highest spatial resolution images ever obtained of the solar corona. One of the goals of the Hi-C flight was to characterize the substructure of the solar corona. We therefore examine how the intensity scales from AIA resolution to Hi-C resolution. For each low-resolution pixel, we calculate the standard deviation in the contributing high-resolution pixel intensities and compare that to the expected standard deviation calculated from the noise. If these numbers are approximately equal, the corona can be assumed to be smoothly varying, i.e., have no evidence of substructure in the Hi-C image to within Hi-C's ability to measure it given its throughput and readout noise. A standard deviation much larger than the noise value indicates the presence of substructure. We calculate these values for each low-resolution pixel for each frame of the Hi-C data. On average, 70% of the pixels in each Hi-C image show no evidence of substructure. The locations where substructure is prevalent is in the moss regions and in regions of sheared magnetic field. We also find that the level of substructure varies significantly over the roughly 160 s of the Hi-C data analyzed here. This result indicates that the finely structured corona is concentrated in regions of heating and is highly time dependent. JF - Astrophysical Journal Letters AU - Winebarger, Amy R AU - CIRTAIN, JONATHAN AU - Golub, Leon AU - DeLuca, Edward AU - Savage, Sabrina AU - Alexander, Caroline AU - Schuler, Timothy AD - NASA Marshall Space Flight Center, ZP 13, Huntsville, AL 35812, USA, amy.r.winebarger@nasa.gov Y1 - 2014/05/20/ PY - 2014 DA - 2014 May 20 SP - 1 EP - 5 PB - IOP Publishing VL - 787 IS - 1 SN - 2041-8205, 2041-8205 KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - Sun: corona KW - Corona KW - Magnetic fields KW - Telescopes KW - Coronal observations KW - Acoustic waves KW - Noise levels KW - Summer KW - Noise pollution KW - P 5000:LAND POLLUTION KW - M2 523.947:Solar Corona (523.947) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664206189?accountid=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+Letters&rft.atitle=DISCOVERY+OF+FINELY+STRUCTURED+DYNAMIC+SOLAR+CORONA+OBSERVED+IN+THE+Hi-C+TELESCOPE&rft.au=Winebarger%2C+Amy+R%3BCIRTAIN%2C+JONATHAN%3BGolub%2C+Leon%3BDeLuca%2C+Edward%3BSavage%2C+Sabrina%3BAlexander%2C+Caroline%3BSchuler%2C+Timothy&rft.aulast=Winebarger&rft.aufirst=Amy&rft.date=2014-05-20&rft.volume=787&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Astrophysical+Journal+Letters&rft.issn=20418205&rft_id=info:doi/10.1088%2F2041-8205%2F787%2F1%2FL10 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Corona; Magnetic fields; Telescopes; Coronal observations; Acoustic waves; Noise pollution; Noise levels; Summer DO - http://dx.doi.org/10.1088/2041-8205/787/1/L10 ER - TY - CPAPER T1 - Swim: A Semi-Analytical Ocean Color Inversion Algorithm for Optically Shallow Waters T2 - 2014 Joint Aquatic Sciences Meeting (JASM 2014) AN - 1548624406; 6293822 JF - 2014 Joint Aquatic Sciences Meeting (JASM 2014) AU - McKinna, L AU - Weeks, S AU - Fearns, P AU - Werdell, P AU - Reichstetter, M AU - Franz, B AU - Feldman, G Y1 - 2014/05/18/ PY - 2014 DA - 2014 May 18 KW - Mathematical models KW - Inversion KW - Shallow water KW - Oceans KW - Algorithms KW - Color UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1548624406?accountid=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+Joint+Aquatic+Sciences+Meeting+%28JASM+2014%29&rft.atitle=Swim%3A+A+Semi-Analytical+Ocean+Color+Inversion+Algorithm+for+Optically+Shallow+Waters&rft.au=McKinna%2C+L%3BWeeks%2C+S%3BFearns%2C+P%3BWerdell%2C+P%3BReichstetter%2C+M%3BFranz%2C+B%3BFeldman%2C+G&rft.aulast=McKinna&rft.aufirst=L&rft.date=2014-05-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Joint+Aquatic+Sciences+Meeting+%28JASM+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.sgmeet.com/jasm2014/sessionlist.asp LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-30 N1 - Last updated - 2014-07-28 ER - TY - JOUR T1 - Compositional evidence of magmatic activity on Vesta AN - 1560085430; 2014-066095 AB - Like the Earth and other terrestrial planets, the asteroid Vesta has a basaltic crust and a large iron core; its surface is dominated by impact craters of all sizes and has tectonic features. The presence of basaltic compositions, olivine, howardite-eucrite-diogenite meteorites, and models of Vesta's formation, suggests that volcanic and/or magmatic activity could have occurred on Vesta. A global search for lobate structures did not find unequivocal evidence of volcanic features. Nevertheless, several morphological properties of Brumalia Tholus on Vestalia Terra suggest that this topographic high most likely formed as a magmatic intrusion. The presence of more orthopyroxene-rich material relative to surrounding terrain in the ejecta of Teia, a fresh impact crater on the northern face of Brumalia Tholus, supports the hypothesis of magmatic intrusions on Vesta. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - De Sanctis, M C AU - Ammannito, E AU - Buczkowski, D AU - Raymond, C A AU - Jaumann, R AU - Mittlefehldt, D W AU - Capaccioni, F AU - Capria, M T AU - Frigeri, A AU - Magni, G AU - Tosi, F AU - Zambon, F AU - Russell, C T Y1 - 2014/05/16/ PY - 2014 DA - 2014 May 16 SP - 3038 EP - 3044 PB - American Geophysical Union, Washington, DC VL - 41 IS - 9 SN - 0094-8276, 0094-8276 KW - Teia Crater KW - asteroids KW - Vesta Asteroid KW - magmatism KW - Brumalia Tholus KW - ejecta KW - volcanic features KW - mineral composition KW - volcanism KW - surface features KW - core KW - basaltic composition KW - crust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560085430?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Compositional+evidence+of+magmatic+activity+on+Vesta&rft.au=De+Sanctis%2C+M+C%3BAmmannito%2C+E%3BBuczkowski%2C+D%3BRaymond%2C+C+A%3BJaumann%2C+R%3BMittlefehldt%2C+D+W%3BCapaccioni%2C+F%3BCapria%2C+M+T%3BFrigeri%2C+A%3BMagni%2C+G%3BTosi%2C+F%3BZambon%2C+F%3BRussell%2C+C+T&rft.aulast=De+Sanctis&rft.aufirst=M&rft.date=2014-05-16&rft.volume=41&rft.issue=9&rft.spage=3038&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL059646 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-09-05 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - asteroids; basaltic composition; Brumalia Tholus; core; crust; ejecta; magmatism; mineral composition; surface features; Teia Crater; Vesta Asteroid; volcanic features; volcanism DO - http://dx.doi.org/10.1002/2014GL059646 ER - TY - JOUR T1 - How Mercury can be the most reduced terrestrial planet and still store iron in its mantle AN - 1553090743; 2014-061933 AB - Mercury is notorious as the most reduced planet with the highest metal/silicate ratio, yet paradoxically data from the MESSENGER spacecraft show that its iron-poor crust is high in sulfur (up to approximately 6 wt%, approximately 80X Earth crust abundance) present mainly as Ca-rich sulfides on its surface. These particularities are simply impossible on the other terrestrial planets. In order to understand the role played by sulfur during the formation of Mercury, we investigated the phase relationships in Mercurian analogs of enstatite chondrite-like composition experimentally under conditions relevant to differentiation of Mercury ( approximately 1 GPa and 1300-2000 degrees C). Our results show that Mg-rich and Ca-rich sulfides, which both contain Fe, crystallize successively from reduced silicate melts upon cooling below 1550 degrees C. As the iron concentration in the reduced silicates stays very low (<<1 wt%), these sulfides represent new host phases for both iron and sulfur in the run products. Extrapolated to Mercury, these results show that Mg-rich sulfide crystallization provides the first viable and fundamental means for retaining iron as well as sulfur in the mantle during differentiation, while sulfides richer in Ca would crystallize at shallower levels. The distribution of iron in the differentiating mantle of Mercury was mainly determined by its partitioning between metal (or troilite) and Mg-Fe-Ca-rich sulfides rather than by its partitioning between metal (or troilite) and silicates. Moreover, the primitive mantle might also be boosted in Fe by a reaction at the core mantle boundary (CMB) between Mg-rich sulfides of the mantle and FeS-rich outer core materials to produce (Fe, Mg)S. The stability of Mg-Fe-Ca-rich sulfides over a large range of depths up to the surface of Mercury would be consistent with sulfur, calcium and iron abundances measured by MESSENGER. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Malavergne, Valerie AU - Cordier, Patrick AU - Righter, Kevin AU - Brunet, Fabrice AU - Zanda, Brigitte AU - Addad, Ahmed AU - Smith, Thomas AU - Bureau, Helene AU - Surble, Suzy AU - Raepsaet, Caroline AU - Charon, Emeline AU - Hewins, Roger H Y1 - 2014/05/15/ PY - 2014 DA - 2014 May 15 SP - 186 EP - 197 PB - Elsevier, Amsterdam VL - 394 SN - 0012-821X, 0012-821X KW - silicates KW - calcium KW - stony meteorites KW - mantle KW - core-mantle boundary KW - melts KW - iron KW - temperature KW - partitioning KW - meteorites KW - Mercury Planet KW - enstatite chondrites KW - chondrites KW - troilite KW - Eh KW - mercury KW - alkaline earth metals KW - experimental studies KW - pressure KW - silicate melts KW - differentiation KW - solubility KW - high pressure KW - terrestrial planets KW - planets KW - metals KW - MErcury Surface, Space ENvironment GEochemistry and Ranging Mission KW - sulfur KW - MESSENGER Mission KW - sulfides KW - high temperature KW - crust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553090743?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=How+Mercury+can+be+the+most+reduced+terrestrial+planet+and+still+store+iron+in+its+mantle&rft.au=Malavergne%2C+Valerie%3BCordier%2C+Patrick%3BRighter%2C+Kevin%3BBrunet%2C+Fabrice%3BZanda%2C+Brigitte%3BAddad%2C+Ahmed%3BSmith%2C+Thomas%3BBureau%2C+Helene%3BSurble%2C+Suzy%3BRaepsaet%2C+Caroline%3BCharon%2C+Emeline%3BHewins%2C+Roger+H&rft.aulast=Malavergne&rft.aufirst=Valerie&rft.date=2014-05-15&rft.volume=394&rft.issue=&rft.spage=186&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.03.028 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 - 50 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2014-08-14 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; calcium; chondrites; core-mantle boundary; crust; differentiation; Eh; enstatite chondrites; experimental studies; high pressure; high temperature; iron; mantle; melts; mercury; Mercury Planet; MErcury Surface, Space ENvironment GEochemistry and Ranging Mission; MESSENGER Mission; metals; meteorites; partitioning; planets; pressure; silicate melts; silicates; solubility; stony meteorites; sulfides; sulfur; temperature; terrestrial planets; troilite DO - http://dx.doi.org/10.1016/j.epsl.2014.03.028 ER - TY - JOUR T1 - Adsorption of l-glutamic acid and l-aspartic acid to y-Al (sub 2) O (sub 3) AN - 1545407701; 2014-055450 AB - The interactions of amino acids with mineral surfaces have potential relevance for processes ranging from pre-biotic chemistry to biomineralization to protein adsorption on biomedical implants in vivo. Here, we report the results of experiments investigating the adsorption of l-glutamic (Glu) and l-aspartic (Asp) acids to gamma -Al (sub 2) O (sub 3) . We examined the extent of Glu and Asp coverage as a function of pH and solution concentration (pH edges and isotherms) in solution-depletion experiments and used in situ Attenuated Total Refkectance Fourier Transform Infrared (ATR-FTIR) spectroscopy to estimate the molecular conformations of the adsorbed molecules. Glu and Asp exhibited similar adsorption behavior on gamma -Al (sub 2) O (sub 3) with respect to pH and solution concentration. In general, adsorption decreased as pH increased. At low and high amino acid concentrations, the isotherms exhibited two apparent saturation coverages, which could be interpreted as 1:4 or 1:2 ratios of adsorbed molecule/surface Al sites. Tetradentate tetranuclear and bidentate binuclear species were the dominant conformations inferred independently from FTIR spectra. In these conformations, both carboxylate groups are involved in bonding to either four or to two Al surface atoms, through direct covalent bonds or via H-bonds. An outer sphere species, in which one carboxylate group interacts with a surface Al atom, could not be ruled out based on the FTIR spectra. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Greiner, Edward AU - Kumar, Kartik AU - Sumit, Madhuresh AU - Giuffre, Anthony AU - Zhao, Weilong AU - Pedersen, Joel AU - Sahai, Nita Y1 - 2014/05/15/ PY - 2014 DA - 2014 May 15 SP - 142 EP - 155 PB - Elsevier, New York, NY VL - 133 SN - 0016-7037, 0016-7037 KW - biomineralization KW - experimental studies KW - glutamic acid KW - medical geology KW - biochemistry KW - adsorption KW - infrared spectra KW - FTIR spectra KW - organic compounds KW - organic acids KW - amino acids KW - spectra KW - pH KW - aspartic acid KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545407701?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Adsorption+of+l-glutamic+acid+and+l-aspartic+acid+to+y-Al+%28sub+2%29+O+%28sub+3%29&rft.au=Greiner%2C+Edward%3BKumar%2C+Kartik%3BSumit%2C+Madhuresh%3BGiuffre%2C+Anthony%3BZhao%2C+Weilong%3BPedersen%2C+Joel%3BSahai%2C+Nita&rft.aulast=Greiner&rft.aufirst=Edward&rft.date=2014-05-15&rft.volume=133&rft.issue=&rft.spage=142&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.01.004 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 - 89 N1 - PubXState - NY N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-07-17 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - adsorption; amino acids; aspartic acid; biochemistry; biomineralization; experimental studies; FTIR spectra; glutamic acid; infrared spectra; medical geology; organic acids; organic compounds; pH; spectra DO - http://dx.doi.org/10.1016/j.gca.2014.01.004 ER - TY - JOUR T1 - Saturn ring seismology; looking beyond first order resonances AN - 1542643842; 2014-046642 AB - Some wave features found in the C-ring of Saturn appear to be excited by resonances with normal mode oscillations of the planet. The waves are found at locations in the rings where the ratio of orbital to oscillation frequencies is given by m:m+1m:m+1 where m is a small integer. I suggest here that it is plausible that ring waves may also be launched at second order resonances where the frequency ratio would be m:m+2m:m+2. Indeed otherwise unassociated wave features are found at such locations in the C-ring. If confirmed the association of planetary modes with additional C-ring wave features would measure additional oscillation frequencies of Saturn and improve the utility of the waves for constraining the internal structure of the planet. Second-order resonances in general do not lie near first order ring resonance locations and thus are not the explanation for the apparent frequency splitting of modes. JF - Icarus AU - Marley, Mark S Y1 - 2014/05/15/ PY - 2014 DA - 2014 May 15 SP - 194 EP - 199 PB - Elsevier, New York, NY VL - 234 SN - 0019-1035, 0019-1035 KW - waves KW - orbits KW - elastic waves KW - giant planets KW - Saturn KW - planets KW - planetary rings KW - resonance KW - gravity field KW - oscillations KW - planetary interiors KW - seismic waves KW - outer planets KW - C-ring KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643842?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Saturn+ring+seismology%3B+looking+beyond+first+order+resonances&rft.au=Marley%2C+Mark+S&rft.aulast=Marley&rft.aufirst=Mark&rft.date=2014-05-15&rft.volume=234&rft.issue=&rft.spage=194&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.02.002 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - PubXState - NY N1 - Last updated - 2014-07-04 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - C-ring; elastic waves; giant planets; gravity field; orbits; oscillations; outer planets; planetary interiors; planetary rings; planets; resonance; Saturn; seismic waves; waves DO - http://dx.doi.org/10.1016/j.icarus.2014.02.002 ER - TY - NEWS T1 - Pioneering Mercury Astronauts Launched America's Future AN - 1524265541 JF - UPI Space Daily AU - Bob Granath for NASA Space History News Y1 - 2014/05/14/ PY - 2014 DA - 2014 May 14 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524265541?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Pioneering+Mercury+Astronauts+Launched+America%27s+Future&rft.au=Bob+Granath+for+NASA+Space+History+News&rft.aulast=Bob+Granath+for+NASA+Space+History+News&rft.aufirst=&rft.date=2014-05-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-05-14 ER - TY - NEWS T1 - Carrington-class CME Narrowly Misses Earth AN - 1523975600 JF - UPI Space Daily AU - Dr Tony Phillips for NASA Science News Y1 - 2014/05/13/ PY - 2014 DA - 2014 May 13 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1523975600?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Carrington-class+CME+Narrowly+Misses+Earth&rft.au=Dr+Tony+Phillips+for+NASA+Science+News&rft.aulast=Dr+Tony+Phillips+for+NASA+Science+News&rft.aufirst=&rft.date=2014-05-13&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-05-13 ER - TY - NEWS T1 - California Faults Moved Quietly After Baja Quake AN - 1523080871 JF - UPI Space Daily AU - Carol Rasmussen for NASA Earth Science News Y1 - 2014/05/12/ PY - 2014 DA - 2014 May 12 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1523080871?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=California+Faults+Moved+Quietly+After+Baja+Quake&rft.au=Carol+Rasmussen+for+NASA+Earth+Science+News&rft.aulast=Carol+Rasmussen+for+NASA+Earth+Science+News&rft.aufirst=&rft.date=2014-05-12&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-05-12 ER - TY - NEWS T1 - NASA Aeronautics Set to Premiere High-Flying Sequel AN - 1522669297 JF - UPI Space Daily AU - Jim Banke for NASA Aeronautics News Y1 - 2014/05/09/ PY - 2014 DA - 2014 May 09 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1522669297?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NASA+Aeronautics+Set+to+Premiere+High-Flying+Sequel&rft.au=Jim+Banke+for+NASA+Aeronautics+News&rft.aulast=Jim+Banke+for+NASA+Aeronautics+News&rft.aufirst=&rft.date=2014-05-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-05-09 ER - TY - CPAPER T1 - Harvey H. Hubbard and his contributions to wind turbine noise (among other things) T2 - 167th Meeting of the Acoustical Society of America AN - 1548628929; 6291236 JF - 167th Meeting of the Acoustical Society of America AU - Shepherd, Kevin Y1 - 2014/05/05/ PY - 2014 DA - 2014 May 05 KW - Turbines KW - Wind energy KW - Noise levels UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1548628929?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=167th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Harvey+H.+Hubbard+and+his+contributions+to+wind+turbine+noise+%28among+other+things%29&rft.au=Shepherd%2C+Kevin&rft.aulast=Shepherd&rft.aufirst=Kevin&rft.date=2014-05-05&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=167th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - http://acousticalsociety.org/sites/default/files/docs/fullprogram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-30 N1 - Last updated - 2014-07-28 ER - TY - JOUR T1 - Evaluation of two crew module boilerplate tests using newly developed calibration metrics AN - 1520386093; 19736176 AB - The paper discusses an application of multi-dimensional calibration metrics to evaluate pressure data from water drop tests of the Max Launch Abort System crew module boilerplate. Specifically, three metrics are discussed: (1) a metric to assess the probability of enveloping the measured data with the model, (2) a multi-dimensional orthogonality metric to assess model adequacy between test and analysis, and (3) a prediction error metric to conduct sensor placement to minimise pressure prediction errors. Data from similar (nearly repeated) capsule drop tests show significant variability in the measured pressure responses. When compared to expected variability using model predictions, it is demonstrated that the measured variability cannot be explained by the model under the current uncertainty assumptions. JF - International Journal of Crashworthiness AU - Horta, Lucas G AU - Reaves, Mercedes C AD - Structural Dynamics Branch, NASA Langley Research Center, Hampton, VA, USA Y1 - 2014/05/04/ PY - 2014 DA - 2014 May 04 SP - 264 EP - 274 PB - Taylor & Francis Group Ltd., 2 Park Square Oxford OX14 4RN United Kingdom VL - 19 IS - 3 SN - 1358-8265, 1358-8265 KW - Health & Safety Science Abstracts KW - Prediction KW - Sensors KW - Crashworthiness KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520386093?accountid=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=International+Journal+of+Crashworthiness&rft.atitle=Evaluation+of+two+crew+module+boilerplate+tests+using+newly+developed+calibration+metrics&rft.au=Horta%2C+Lucas+G%3BReaves%2C+Mercedes+C&rft.aulast=Horta&rft.aufirst=Lucas&rft.date=2014-05-04&rft.volume=19&rft.issue=3&rft.spage=264&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Crashworthiness&rft.issn=13588265&rft_id=info:doi/10.1080%2F13588265.2014.883912 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Prediction; Sensors; Crashworthiness DO - http://dx.doi.org/10.1080/13588265.2014.883912 ER - TY - JOUR T1 - The effect of planets beyond the ice line on the accretion of volatiles by habitable-zone rocky planets AN - 1832649038; 696708-34 AB - Models of planet formation have shown that giant planets have a large impact on the number, masses, and orbits of terrestrial planets that form. In addition, they play an important role in delivering volatiles from material that formed exterior to the snow line (the region in the disk beyond which water ice can condense) to the inner region of the disk where terrestrial planets can maintain liquid water on their surfaces. We present simulations of the late stages of terrestrial planet formation from a disk of protoplanets around a solar-type star and we include a massive planet (from 1 M (sub ⊕) to 1 M (sub J) ) in Jupiter's orbit at approximately 5.2 AU in all but one set of simulations. Two initial disk models are examined with the same mass distribution and total initial water content, but with different distributions of water content. We compare the accretion rates and final water mass fraction of the planets that form. Remarkably, all of the planets that formed in our simulations without giant planets were water-rich, showing that giant planet companions are not required to deliver volatiles to terrestrial planets in the habitable zone. In contrast, an outer planet at least several times the mass of Earth may be needed to clear distant regions of debris truncating the epoch of frequent large impacts. Observations of exoplanets from radial velocity surveys suggest that outer Jupiter-like planets may be scarce, therefore, the results presented here suggest that there may be more habitable planets residing in our galaxy than previously thought. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Quintana, Elisa V AU - Lissauer, Jack J Y1 - 2014/05/01/ PY - 2014 DA - 2014 May 01 EP - Paper no. 33 PB - IOP Publishing for American Astronomical Society, Bristol VL - 786 IS - 1 SN - 0004-637X, 0004-637X KW - power law KW - orbits KW - Jupiter KW - planetesimals KW - simulation KW - protoplanetary disk KW - giant planets KW - mass KW - Saturn KW - N-body simulation KW - Sun KW - Mercury Planet KW - water content KW - outer planets KW - water KW - Earth KW - accretion KW - numerical models KW - extrasolar planets KW - habitable zone KW - terrestrial planets KW - planets KW - volatiles KW - planetology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832649038?accountid=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=The+effect+of+planets+beyond+the+ice+line+on+the+accretion+of+volatiles+by+habitable-zone+rocky+planets&rft.au=Quintana%2C+Elisa+V%3BLissauer%2C+Jack+J&rft.aulast=Quintana&rft.aufirst=Elisa&rft.date=2014-05-01&rft.volume=786&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F786%2F1%2F33 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 - 43 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - accretion; Earth; extrasolar planets; giant planets; habitable zone; Jupiter; mass; Mercury Planet; N-body simulation; numerical models; orbits; outer planets; planetesimals; planetology; planets; power law; protoplanetary disk; Saturn; simulation; Sun; terrestrial planets; volatiles; water; water content DO - http://dx.doi.org/10.1088/0004-637X/786/1/33 ER - TY - JOUR T1 - Sands at Gusev Crater, Mars AN - 1729847275; 2015-105594 AB - Processes, environments, and the energy associated with the transport and deposition of sand at Gusev Crater are characterized at the microscopic scale through the comparison of statistical moments for particle size and shape distributions. Bivariate and factor analyses define distinct textural groups at 51 sites along the traverse completed by the Spirit rover as it crossed the plains and went into the Columbia Hills. Fine-to-medium sand is ubiquitous in ripples and wind drifts. Most distributions show excess fine material, consistent with a predominance of wind erosion over the last 3.8 billion years. Negative skewness at West Valley is explained by the removal of fine sand during active erosion, or alternatively, by excess accumulation of coarse sand from a local source. The coarse to very coarse sand particles of ripple armors in the basaltic plains have a unique combination of size and shape. Their distribution display significant changes in their statistical moments within the approximately 400 m that separate the Columbia Memorial Station from Bonneville Crater. Results are consistent with aeolian and/or impact deposition, while the elongated and rounded shape of the grains forming the ripples, as well as their direction of origin, could point to Ma'adim Vallis as a possible source. For smaller particles on the traverse, our findings confirm that aeolian processes have dominated over impact and other processes to produce sands with the observed size and shape patterns across a spectrum of geologic (e.g., ripples and plains soils) and aerographic settings (e.g., wind shadows). Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Cabrol, Nathalie A AU - Herkenhoff, Kenneth AU - Knoll, Andrew H AU - Farmer, Jack AU - Arvidson, Raymond AU - Grin, Edmond AU - Li, Ronxing AU - Fenton, Lori AU - Cohen, Barbara AU - Bell, James F, III AU - Yingst, R Aileen Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 941 EP - 967 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 5 SN - 2169-9097, 2169-9097 KW - eolian features KW - imagery KW - Spirit Rover KW - erosion KW - factor analysis KW - Mars KW - ripple marks KW - Mars Exploration Rover KW - bedding plane irregularities KW - transport KW - sediments KW - sorting KW - plains KW - basaltic composition KW - sedimentary structures KW - Gusev Crater KW - soils KW - sand KW - bivariate analysis KW - sediment transport KW - clastic sediments KW - textures KW - grain size KW - statistical analysis KW - wind erosion KW - Columbia Hills KW - terrestrial planets KW - provenance KW - planets KW - skewness KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729847275?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Sands+at+Gusev+Crater%2C+Mars&rft.au=Cabrol%2C+Nathalie+A%3BHerkenhoff%2C+Kenneth%3BKnoll%2C+Andrew+H%3BFarmer%2C+Jack%3BArvidson%2C+Raymond%3BGrin%2C+Edmond%3BLi%2C+Ronxing%3BFenton%2C+Lori%3BCohen%2C+Barbara%3BBell%2C+James+F%2C+III%3BYingst%2C+R+Aileen&rft.aulast=Cabrol&rft.aufirst=Nathalie&rft.date=2014-05-01&rft.volume=119&rft.issue=5&rft.spage=941&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004535 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 142 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables, sketch map N1 - Last updated - 2015-11-05 N1 - SubjectsTermNotLitGenreText - basaltic composition; bedding plane irregularities; bivariate analysis; clastic sediments; Columbia Hills; eolian features; erosion; factor analysis; grain size; Gusev Crater; imagery; Mars; Mars Exploration Rover; plains; planets; provenance; ripple marks; sand; sediment transport; sedimentary structures; sediments; skewness; soils; sorting; Spirit Rover; statistical analysis; terrestrial planets; textures; transport; wind erosion DO - http://dx.doi.org/10.1002/2013JE004535 ER - TY - JOUR T1 - Climate trends in the Arctic as observed from space AN - 1712567684; PQ0001958565 AB - The Arctic is a region in transformation. Warming in the region has been amplified, as expected from ice-albedo feedback effects, with the rate of warming observed to be 0.60 plus or minus 0.07 degree C/decade in the Arctic (>64 degree N) compared to 0.17 degree C/decade globally during the last three decades. This increase in surface temperature is manifested in all components of the cryosphere. In particular, the sea ice extent has been declining at the rate of 3.8%/decade, whereas the perennial ice (represented by summer ice minimum) is declining at a much greater rate of 11.5%/decade. Spring snow cover has also been observed to be declining by -2.12%/decade for the period 1967-2012. The Greenland ice sheet has been losing mass at the rate of 34.0Gt/year (sea level equivalence of 0.09mm/year) during the period from 1992 to 2011, but for the period 2002-2011, a higher rate of mass loss of 215Gt/year has been observed. Also, the mass of glaciers worldwide declined at the rate of 226 Gt/year from 1971 to 2009 and 275 Gt/year from 1993 to 2009. Increases in permafrost temperature have also been measured in many parts of the Northern Hemisphere while a thickening of the active layer that overlies permafrost and a thinning of seasonally frozen ground has also been reported. To gain insight into these changes, comparative analysis with trends in clouds, albedo, and the Arctic Oscillation is also presented. For further resources related to this article, please visit the WIREs website . Conflict of interest: The authors have declared no conflicts of interest for this article. JF - Wiley Interdisciplinary Reviews: Climate Change AU - Comiso, Josefino C AU - Hall, Dorothy K AD - Cryospheric Sciences Laboratory, Code 615 Earth Sciences Division, NASA Goddard Space Flight Center, Greenbelt, MD, USA. Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 389 EP - 409 PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 5 IS - 3 SN - 1757-7780, 1757-7780 KW - Meteorological & Geoastrophysical Abstracts; Sustainability Science Abstracts KW - Surface temperatures KW - Sea level KW - Active layer KW - Climate change KW - Greenland ice sheet KW - Permafrost KW - Summer KW - World Wide Web KW - Cryosphere KW - Conflict of interests KW - Ice KW - PN, Greenland, Greenland Ice Sheet KW - Snow KW - Arctic Oscillation KW - Albedo KW - Climate KW - Temperature KW - Climatic trends KW - Polar environments KW - Snow cover KW - PN, Arctic KW - Clouds KW - Thinning KW - Sea ice KW - Permafrost temperatures KW - Reviews 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/1712567684?accountid=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=Wiley+Interdisciplinary+Reviews%3A+Climate+Change&rft.atitle=Climate+trends+in+the+Arctic+as+observed+from+space&rft.au=Comiso%2C+Josefino+C%3BHall%2C+Dorothy+K&rft.aulast=Comiso&rft.aufirst=Josefino&rft.date=2014-05-01&rft.volume=5&rft.issue=3&rft.spage=389&rft.isbn=&rft.btitle=&rft.title=Wiley+Interdisciplinary+Reviews%3A+Climate+Change&rft.issn=17577780&rft_id=info:doi/10.1002%2Fwcc.277 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Surface temperatures; Active layer; Albedo; Arctic Oscillation; Climate change; Greenland ice sheet; Permafrost; Climatic trends; Snow cover; World Wide Web; Clouds; Permafrost temperatures; Sea ice; Cryosphere; Ice; Sea level; Snow; Climate; Temperature; Summer; Polar environments; Thinning; Reviews; Conflict of interests; PN, Arctic; PN, Greenland, Greenland Ice Sheet DO - http://dx.doi.org/10.1002/wcc.277 ER - TY - JOUR T1 - Potential influence of the late Holocene climate on settled farming versus nomadic cattle herding in the Minusinsk Hollow, south-central Siberia AN - 1641011635; 2015-002408 AB - Prehistoric and early historic human cultures are known to be closely connected to and dependent on their natural environments. We test the hypothesis that climate change influenced the means of subsistence of ancient tribes and favored agricultural or cattle herding economic strategies. Our study area is the Khakass-Minusinsk Hollow, located in the foothills of the Sayan Mountains, south-central Siberia, which was, for a few millennia, a buffer zone for human migrations across the Great Eurasian Steppe. Three different methods (the Montane BioClimatic Model, MontBCliM; the biomization method; and the actualizm method) are employed to reconstruct vegetation taken from the fossil pollen of sediment cores in two mountain lakes at eleven time slices related to successive human cultures back to the mid-Holocene. MontBCliM model is used inversely to convert site paleo-vegetation into site paleo-climates. Climate-based regression models are developed and applied to reconstructed climates to evaluate possible pasture and grain crops for these time slices. Pollen-based reconstructions of the climate fluctuations uncovered several dry periods with steppe and forest-steppe and wetter periods with forests since 6000 BP. Grasslands increased by an order of magnitude during the dry periods and provided extensive open space suitable for pastoralism; however, both grain and pasture yields decreased during these dry periods. During wetter climates, both grain and pasture yields increased twofold and supported more fixed human settlements centered around farming and cattle herding. Thus, the dry periods favored pastoralist rather than farming activities. Conversely, tribes that practiced agriculture had some advantage in the wet periods. Copyright (Copyright) 2014 IOP Publishing Ltd JF - Environmental Research Letters AU - Blyakharchuk, T A AU - Tchebakova, N M AU - Parfenova, E I AU - Soja, A J Y1 - 2014/05// PY - 2014 DA - May 2014 EP - Paper no. 065004 PB - IOP Publishing for Institute of Physics, Bristol VL - 9 IS - 6 KW - pastoralism KW - Khakasiya Russian Federation KW - isotopes KW - Siberian fold belt KW - vegetation KW - paleoclimatology KW - Holocene KW - cores KW - Cenozoic KW - Siberia KW - radioactive isotopes KW - pollen KW - carbon KW - Kutuzhekovo Lake KW - sediments KW - miospores KW - Asia KW - forests KW - Quaternary KW - Sayan KW - agriculture KW - Minusinsk Hollow KW - models KW - steppes KW - Dikoe Lake KW - palynomorphs KW - Bronze Age KW - reconstruction KW - C-14 KW - upper Holocene KW - microfossils KW - lake sediments KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011635?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Research+Letters&rft.atitle=Potential+influence+of+the+late+Holocene+climate+on+settled+farming+versus+nomadic+cattle+herding+in+the+Minusinsk+Hollow%2C+south-central+Siberia&rft.au=Blyakharchuk%2C+T+A%3BTchebakova%2C+N+M%3BParfenova%2C+E+I%3BSoja%2C+A+J&rft.aulast=Blyakharchuk&rft.aufirst=T&rft.date=2014-05-01&rft.volume=9&rft.issue=6&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=1748-9326&rft_id=info:doi/10.1088%2F1748-9326%2F9%2F6%2F065004 L2 - http://iopscience.iop.org/1748-9326 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 59 N1 - Document feature - illus. incl. 5 tables, sketch map N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - agriculture; Asia; Bronze Age; C-14; carbon; Cenozoic; cores; Dikoe Lake; forests; Holocene; isotopes; Khakasiya Russian Federation; Kutuzhekovo Lake; lake sediments; microfossils; Minusinsk Hollow; miospores; models; paleoclimatology; palynomorphs; pastoralism; pollen; Quaternary; radioactive isotopes; reconstruction; Sayan; sediments; Siberia; Siberian fold belt; steppes; upper Holocene; vegetation DO - http://dx.doi.org/10.1088/1748-9326/9/6/065004 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 - Prokaryote populations of extant microbialites along a depth gradient in Pavilion Lake, British Columbia, Canada AN - 1629943847; 2014-093867 AB - Pavilion Lake in British Columbia, Canada, is home to modern-day microbialites that are actively growing at multiple depths within the lake. While microbialite morphology changes with depth and previous isotopic investigations suggested a biological role in the formation of these carbonate structures, little is known about their microbial communities. Microbialite samples acquired through the Pavilion Lake Research Project (PLRP) were first investigated for phototrophic populations using Cyanobacteria-specific primers and 16S rRNA gene cloning. These data were expounded on by high-throughput tagged sequencing analyses of the general bacteria population. These molecular analyses show that the microbial communities of Pavilion Lake microbialites are diverse compared to non-lithifying microbial mats also found in the lake. Phototrophs and heterotrophs were detected, including species from the recently described Chloroacidobacteria genus, a photoheterotroph that has not been previously observed in microbialite systems. Phototrophs were shown as the most influential contributors to community differences above and below 25 meters, and corresponding shifts in heterotrophic populations were observed at this interface as well. The isotopic composition of carbonate also mirrored this shift in community states. Comparisons to previous studies indicated this population shift may be a consequence of changes in lake chemistry at this depth. Microbial community composition did not correlate with changing microbialite morphology with depth, suggesting something other than community changes may be a key to observed variations in microbialite structure. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - Geobiology AU - Russell, J A AU - Brady, A L AU - Cardman, Z AU - Slater, G F AU - Lim, D S S AU - Biddle, J F Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 250 EP - 264 PB - Blackwell, Oxford VL - 12 IS - 3 SN - 1472-4677, 1472-4677 KW - limestone KW - communities KW - isotopes KW - nodules KW - stable isotopes KW - Pavilion Lake KW - sedimentary rocks KW - algal mats KW - carbon KW - depositional environment KW - chemical composition KW - sedimentary structures KW - cyanobacteria KW - isotope ratios KW - biogenic structures KW - C-13/C-12 KW - statistical analysis KW - British Columbia KW - algal structures KW - genetics KW - nucleic acids KW - Canada KW - microbialite KW - lacustrine environment KW - DNA KW - Western Canada KW - carbonate rocks KW - 06A:Sedimentary petrology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943847?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Prokaryote+populations+of+extant+microbialites+along+a+depth+gradient+in+Pavilion+Lake%2C+British+Columbia%2C+Canada&rft.au=Russell%2C+J+A%3BBrady%2C+A+L%3BCardman%2C+Z%3BSlater%2C+G+F%3BLim%2C+D+S+S%3BBiddle%2C+J+F&rft.aulast=Russell&rft.aufirst=J&rft.date=2014-05-01&rft.volume=12&rft.issue=3&rft.spage=250&rft.isbn=&rft.btitle=&rft.title=Geobiology&rft.issn=14724677&rft_id=info:doi/10.1111%2Fgbi.12082 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 - 63 N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2014-12-04 N1 - SubjectsTermNotLitGenreText - algal mats; algal structures; biogenic structures; British Columbia; C-13/C-12; Canada; carbon; carbonate rocks; chemical composition; communities; cyanobacteria; depositional environment; DNA; genetics; isotope ratios; isotopes; lacustrine environment; limestone; microbialite; nodules; nucleic acids; Pavilion Lake; sedimentary rocks; sedimentary structures; stable isotopes; statistical analysis; Western Canada DO - http://dx.doi.org/10.1111/gbi.12082 ER - TY - JOUR T1 - Aromatic and aliphatic organic materials on Iapetus; analysis of Cassini VIMS data AN - 1560084088; 2014-069023 JF - Icarus AU - Cruikshank, Dale P AU - Dalle Ore, Cristina M AU - Clark, Roger N AU - Pendleton, Yvonne J Y1 - 2014/05/01/ PY - 2014 DA - 2014 May 01 SP - 306 EP - 315 PB - Elsevier, New York, NY VL - 233 SN - 0019-1035, 0019-1035 KW - albedo KW - icy satellites KW - data processing KW - aliphatic hydrocarbons KW - calibration KW - Phoebe Satellite KW - infrared spectra KW - giant planets KW - cluster analysis KW - Saturn KW - Cassini-Huygens Mission KW - electromagnetic radiation KW - spectra KW - outer planets KW - satellites KW - chemical composition KW - water KW - solar system KW - VIMS instrument KW - Visible and Infrared Mapping Spectrometer KW - statistical analysis KW - hydrogenation KW - Iapetus Satellite KW - ultraviolet radiation KW - solar nebula KW - planets KW - organic compounds KW - planetary interiors KW - hydrocarbons KW - polycyclic aromatic hydrocarbons KW - corrections KW - instruments KW - aromatic hydrocarbons KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560084088?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Aromatic+and+aliphatic+organic+materials+on+Iapetus%3B+analysis+of+Cassini+VIMS+data&rft.au=Cruikshank%2C+Dale+P%3BDalle+Ore%2C+Cristina+M%3BClark%2C+Roger+N%3BPendleton%2C+Yvonne+J&rft.aulast=Cruikshank&rft.aufirst=Dale&rft.date=2014-05-01&rft.volume=233&rft.issue=&rft.spage=306&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.02.011 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 65 N1 - PubXState - NY N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-09-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - albedo; aliphatic hydrocarbons; aromatic hydrocarbons; calibration; Cassini-Huygens Mission; chemical composition; cluster analysis; corrections; data processing; electromagnetic radiation; giant planets; hydrocarbons; hydrogenation; Iapetus Satellite; icy satellites; infrared spectra; instruments; organic compounds; outer planets; Phoebe Satellite; planetary interiors; planets; polycyclic aromatic hydrocarbons; satellites; Saturn; solar nebula; solar system; spectra; statistical analysis; ultraviolet radiation; VIMS instrument; Visible and Infrared Mapping Spectrometer; water DO - http://dx.doi.org/10.1016/j.icarus.2014.02.011 ER - TY - JOUR T1 - Upper limits for a lunar dust exosphere from far-ultraviolet spectroscopy by LRO/LAMP AN - 1560084079; 2014-069007 JF - Icarus AU - Feldman, Paul D AU - Glenar, David A AU - Stubbs, Timothy J AU - Retherford, Kurt D AU - Gladstone, G Randall AU - Miles, Paul F AU - Greathouse, Thomas K AU - Kaufmann, David E AU - Parker, Joel William AU - Stern, S Alan Y1 - 2014/05/01/ PY - 2014 DA - 2014 May 01 SP - 106 EP - 113 PB - Elsevier, New York, NY VL - 233 SN - 0019-1035, 0019-1035 KW - numerical models KW - Moon KW - Lunar Reconnaissance Orbiter KW - clastic sediments KW - atmosphere KW - Apollo Program KW - simulation KW - geometry KW - exosphere KW - brightness KW - Lunar Atmosphere and Dust Environment Explorer KW - Mie scattering KW - dust KW - solar radiation KW - sediments KW - ultraviolet spectra KW - Lyman Alpha Mapping Project KW - spectra KW - orbital observations KW - Apollo 15 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560084079?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Upper+limits+for+a+lunar+dust+exosphere+from+far-ultraviolet+spectroscopy+by+LRO%2FLAMP&rft.au=Feldman%2C+Paul+D%3BGlenar%2C+David+A%3BStubbs%2C+Timothy+J%3BRetherford%2C+Kurt+D%3BGladstone%2C+G+Randall%3BMiles%2C+Paul+F%3BGreathouse%2C+Thomas+K%3BKaufmann%2C+David+E%3BParker%2C+Joel+William%3BStern%2C+S+Alan&rft.aulast=Feldman&rft.aufirst=Paul&rft.date=2014-05-01&rft.volume=233&rft.issue=&rft.spage=106&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.01.039 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 24 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-11-13 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - Apollo 15; Apollo Program; atmosphere; brightness; clastic sediments; dust; exosphere; geometry; Lunar Atmosphere and Dust Environment Explorer; Lunar Reconnaissance Orbiter; Lyman Alpha Mapping Project; Mie scattering; Moon; numerical models; orbital observations; sediments; simulation; solar radiation; spectra; ultraviolet spectra DO - http://dx.doi.org/10.1016/j.icarus.2014.01.039 ER - TY - JOUR T1 - Relationship Between Carbon Dioxide Levels and Reported Headaches on the International Space Station AN - 1547850142; 20285686 AB - Objective: Because of anecdotal reports of CO sub(2)-related symptoms onboard the International Space Station (ISS), the relationship between CO sub(2) and in-flight headaches was analyzed. Methods: Headache reports and CO sub(2) measurements were obtained, and arithmetic means and single-point maxima were determined for 24-hour and 7-day periods. Multiple imputation addressed missing data, and logistic regression modeled the relationship between CO sub(2), headache probability, and covariates. Results: CO sub(2) level, age at launch, time in-flight, and data source were significantly associated with headache. For each 1-mm Hg increase in CO sub(2), the odds of a crew member reporting a headache doubled. To keep the risk of headache below 1%, average 7-day CO sub(2) would need to be maintained below 2.5 mm Hg (current ISS range: 1 to 9 mm Hg). Conclusions: Although headache incidence was not high, results suggest an increased susceptibility to physiological effects of CO sub(2) in-flight. JF - Journal of Occupational and Environmental Medicine AU - Law, Jennifer AU - Van Baalen, Mary AU - Foy, Millennia AU - Mason, Sara S AU - Mendez, Claudia AU - Wear, Mary L AU - Meyers, Valerie E AU - Alexander, David AD - NASA Johnson Space Center, jennifer.t.law@nasa.gov PY - 2014 SP - 477 EP - 483 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 56 IS - 5 SN - 1076-2752, 1076-2752 KW - Risk Abstracts; Health & Safety Science Abstracts KW - Age KW - Physiology KW - Carbon dioxide KW - R2 23080:Industrial and labor KW - H 1000:Occupational Safety and Health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1547850142?accountid=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=Journal+of+Occupational+and+Environmental+Medicine&rft.atitle=Relationship+Between+Carbon+Dioxide+Levels+and+Reported+Headaches+on+the+International+Space+Station&rft.au=Law%2C+Jennifer%3BVan+Baalen%2C+Mary%3BFoy%2C+Millennia%3BMason%2C+Sara+S%3BMendez%2C+Claudia%3BWear%2C+Mary+L%3BMeyers%2C+Valerie+E%3BAlexander%2C+David&rft.aulast=Law&rft.aufirst=Jennifer&rft.date=2014-05-01&rft.volume=56&rft.issue=5&rft.spage=477&rft.isbn=&rft.btitle=&rft.title=Journal+of+Occupational+and+Environmental+Medicine&rft.issn=10762752&rft_id=info:doi/10.1097%2FJOM.0000000000000158 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-07-01 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Age; Physiology; Carbon dioxide DO - http://dx.doi.org/10.1097/JOM.0000000000000158 ER - TY - JOUR T1 - Developing GIOVANNI-based online prototypes to intercompare TRMM-related global gridded-precipitation products AN - 1545406857; 2014-053289 AB - New online prototypes have been developed to extend and enhance the previous effort by facilitating investigation of product characteristics and intercomparison of precipitation products in different algorithms as well as in different versions at different spatial scales ranging from local to global without downloading data and software. Several popular Tropical Rainfall Measuring Mission (TRMM) products and the TRMM Composite Climatology are included. In addition, users can download customized data in several popular formats for further analysis. Examples show product quality problems and differences in several monthly precipitation products. It is seen that differences in daily and monthly precipitation products are distributed unevenly in space and it is necessary to have tools such as those presented here for customized and detailed investigations. A simple time series and two area maps allow the discovery of abnormal values of 3A25 in one of the months. An example shows a V-shaped valley issue in the Version 6 3B43 time series and another example shows a sudden drop in 3A25 monthly rain rate, all of which provide important information when the products are used for long-term trend studies. Future plans include adding more products and statistical functionality in the prototypes. Abstract Copyright (2014) Elsevier, B.V. JF - Computers & Geosciences AU - Liu, Zhong AU - Ostrenga, Dana AU - Teng, William AU - Kempler, Steven AU - Milich, Lenard Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 168 EP - 181 PB - Elsevier, Amsterdam VL - 66 SN - 0098-3004, 0098-3004 KW - hydrology KW - GIOVANNI KW - rainfall KW - data processing KW - Caribbean region KW - atmospheric precipitation KW - satellite methods KW - climate change KW - Tropical Rainfall Measuring Mission KW - algorithms KW - meteorology KW - rain KW - climate KW - remote sensing KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545406857?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Developing+GIOVANNI-based+online+prototypes+to+intercompare+TRMM-related+global+gridded-precipitation+products&rft.au=Liu%2C+Zhong%3BOstrenga%2C+Dana%3BTeng%2C+William%3BKempler%2C+Steven%3BMilich%2C+Lenard&rft.aulast=Liu&rft.aufirst=Zhong&rft.date=2014-05-01&rft.volume=66&rft.issue=&rft.spage=168&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Geosciences&rft.issn=00983004&rft_id=info:doi/10.1016%2Fj.cageo.2013.12.012 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 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 33 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-07-17 N1 - CODEN - GGEOD5 N1 - SubjectsTermNotLitGenreText - algorithms; atmospheric precipitation; Caribbean region; climate; climate change; data processing; GIOVANNI; hydrology; meteorology; rain; rainfall; remote sensing; satellite methods; Tropical Rainfall Measuring Mission DO - http://dx.doi.org/10.1016/j.cageo.2013.12.012 ER - TY - JOUR T1 - The CHAOS-4 geomagnetic field model AN - 1542643621; 2014-046782 AB - We present CHAOS-4, a new version in the CHAOS model series, which aims to describe the Earth's magnetic field with high spatial and temporal resolution. Terms up to spherical degree of at least n = 85 for the lithospheric field, and up to n = 16 for the time-varying core field are robustly determined.More than 14 yr of data from the satellites Orsted, CHAMP and SAC-C, augmented with magnetic observatory monthly mean values have been used for this model. Maximum spherical harmonic degree of the static (lithospheric) field is n = 100. The core field is expressed by spherical harmonic expansion coefficients up to n = 20; its time-evolution is described by order six splines, with 6-month knot spacing, spanning the time interval 1997.0-2013.5. The third time derivative of the squared radial magnetic field component is regularized at the core-mantle boundary. No spatial regularization is applied to the core field, but the high-degree lithospheric field is regularized for n > 85.CHAOS-4 model is derived by merging two submodels: its low-degree part has been derived using similar model parametrization and data sets as used for previous CHAOS models (but of course including more recent data), while its high-degree lithospheric field part is solely determined from low-altitude CHAMP satellite observations taken during the last 2 yr (2008 September-2010 September) of the mission. We obtain a good agreement with other recent lithospheric field models like MF7 for degrees up to n = 85, confirming that lithospheric field structures down to a horizontal wavelength of 500 km are currently robustly determined. JF - Geophysical Journal International AU - Olsen, Nils AU - Luehr, Hermann AU - Finlay, Christopher C AU - Sabaka, Terence J AU - Michaelis, Ingo AU - Rauberg, Jan AU - Toffner-Clausen, Lars Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 815 EP - 827 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 197 IS - 2 SN - 0956-540X, 0956-540X KW - numerical models KW - lithosphere KW - magnetic anomalies KW - CHAOS-4 KW - inverse problem KW - satellite methods KW - magnetic field KW - spherical harmonic analysis KW - models KW - sphericity KW - core KW - algorithms KW - remote sensing KW - 18:Solid-earth geophysics KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643621?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+CHAOS-4+geomagnetic+field+model&rft.au=Olsen%2C+Nils%3BLuehr%2C+Hermann%3BFinlay%2C+Christopher+C%3BSabaka%2C+Terence+J%3BMichaelis%2C+Ingo%3BRauberg%2C+Jan%3BToffner-Clausen%2C+Lars&rft.aulast=Olsen&rft.aufirst=Nils&rft.date=2014-05-01&rft.volume=197&rft.issue=2&rft.spage=815&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggu033 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. 2 tables, sketch maps N1 - Last updated - 2014-07-04 N1 - SubjectsTermNotLitGenreText - algorithms; CHAOS-4; core; inverse problem; lithosphere; magnetic anomalies; magnetic field; models; numerical models; remote sensing; satellite methods; spherical harmonic analysis; sphericity DO - http://dx.doi.org/10.1093/gji/ggu033 ER - TY - JOUR T1 - Waiting for O (sub 2) AN - 1535203597; 2014-039301 AB - Oxygenic photosynthesis appears to be necessary for an oxygen-rich atmosphere like Earth's. However, available geological and geochemical evidence suggests that at least 200 m.y., and possibly as many as 700 m.y., elapsed between the advent of oxygenic photosynthesis and the establishment of an oxygen atmosphere. The interregnum implies that at least one other necessary condition for O (sub 2) needed to be met. Here, we argue that the second condition was the oxidation of the surface and crust to the point where free O (sub 2) became more stable than competing reduced gases such as CH (sub 4) , and that the cause of Earth's surface oxidation was the same cause as it is for other planets with oxidized surfaces: hydrogen escape to space. The duration of the interregnum was determined by the rate of hydrogen escape and by the size of the reduced reservoir that needed to be oxidized before O (sub 2) became favored. We speculate that hydrogen escape determined the history of continental growth, and we are confident that hydrogen escape provided a progressive bias to biological evolution. JF - Special Paper - Geological Society of America AU - Zahnle, Kevin AU - Catling, David Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 37 EP - 48 PB - Geological Society of America (GSA), Boulder, CO VL - 504 SN - 0072-1077, 0072-1077 KW - photosynthesis KW - oxygen KW - isotopes KW - aliphatic hydrocarbons KW - stability KW - mantle KW - continental crust KW - stable isotopes KW - life origin KW - carbon KW - reduction KW - chemical composition KW - geochemistry KW - methane KW - isotope ratios KW - paleoatmosphere KW - oxidation KW - C-13/C-12 KW - photochemistry KW - atmosphere KW - biologic evolution KW - alkanes KW - organic compounds KW - S-34/S-32 KW - Great Oxidation Event KW - hydrogen KW - hydrocarbons KW - sulfur KW - crust KW - 18:Solid-earth geophysics KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535203597?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Paper+-+Geological+Society+of+America&rft.atitle=Waiting+for+O+%28sub+2%29&rft.au=Zahnle%2C+Kevin%3BCatling%2C+David&rft.aulast=Zahnle&rft.aufirst=Kevin&rft.date=2014-05-01&rft.volume=504&rft.issue=&rft.spage=37&rft.isbn=&rft.btitle=&rft.title=Special+Paper+-+Geological+Society+of+America&rft.issn=00721077&rft_id=info:doi/10.1130%2F2014.2504%2807%29 LA - English DB - GeoRef 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 - Number of references - 98 N1 - PubXState - CO N1 - Document feature - illus. N1 - Last updated - 2014-06-13 N1 - CODEN - GSAPAZ N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; atmosphere; biologic evolution; C-13/C-12; carbon; chemical composition; continental crust; crust; geochemistry; Great Oxidation Event; hydrocarbons; hydrogen; isotope ratios; isotopes; life origin; mantle; methane; organic compounds; oxidation; oxygen; paleoatmosphere; photochemistry; photosynthesis; reduction; S-34/S-32; stability; stable isotopes; sulfur DO - http://dx.doi.org/10.1130/2014.2504(07) ER - TY - JOUR T1 - How low can you go; maximum constraints on hydrogen concentrations prior to the Great Oxidation Event AN - 1535203550; 2014-039296 AB - Shaw postulates that Earth's early atmosphere was rich in reducing gases such as hydrogen, brought to Earth via impact events. This commentary seeks to place constraints on this idea through a very brief review of existing geological and geochemical upper limits on the reducing power of Earth's atmosphere prior to the rise of oxygen. While these constraints place tight limits on this idea for rocks younger than 3.8 Ga, few constraints exist prior to that time, due to a paucity of rocks of that age. The time prior to these constraints is also a time frame for which the proposal is most plausible, and for which it carries the greatest potential to explain other mysteries. Given this potential, several tests are suggested for the H (sub 2) -rich early Earth hypothesis. JF - Special Paper - Geological Society of America AU - Domagal-Goldman, Shawn Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 11 EP - 13 PB - Geological Society of America (GSA), Boulder, CO VL - 504 SN - 0072-1077, 0072-1077 KW - Hadean KW - accretion KW - Precambrian KW - oxygen KW - isotopes KW - paleoatmosphere KW - mantle KW - atmosphere KW - impacts KW - gases KW - Great Oxidation Event KW - hydrogen KW - sulfur KW - Archean KW - reduction KW - greenhouse effect KW - chemical composition KW - geochemistry KW - Eh KW - degassing KW - 12:Stratigraphy KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535203550?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Paper+-+Geological+Society+of+America&rft.atitle=How+low+can+you+go%3B+maximum+constraints+on+hydrogen+concentrations+prior+to+the+Great+Oxidation+Event&rft.au=Domagal-Goldman%2C+Shawn&rft.aulast=Domagal-Goldman&rft.aufirst=Shawn&rft.date=2014-05-01&rft.volume=504&rft.issue=&rft.spage=11&rft.isbn=&rft.btitle=&rft.title=Special+Paper+-+Geological+Society+of+America&rft.issn=00721077&rft_id=info:doi/10.1130%2F2014.2504%2802%29 LA - English DB - GeoRef 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 - Number of references - 10 N1 - PubXState - CO N1 - Last updated - 2014-06-13 N1 - CODEN - GSAPAZ N1 - SubjectsTermNotLitGenreText - accretion; Archean; atmosphere; chemical composition; degassing; Eh; gases; geochemistry; Great Oxidation Event; greenhouse effect; Hadean; hydrogen; impacts; isotopes; mantle; oxygen; paleoatmosphere; Precambrian; reduction; sulfur DO - http://dx.doi.org/10.1130/2014.2504(02) ER - TY - JOUR T1 - The upside-down biosphere; "Evidence for the partially oxygenated oceans during the Archean Eon"; discussion AN - 1535203463; 2014-039304 AB - This is a commentary on the preceding chapter by Ohmoto et al., in which it is suggested that oxygen concentrations have been high throughout Earth history. This is a contentious suggestion at odds with the prevailing view in the field, which contends that atmospheric oxygen concentrations rose from trace levels to a few percent of modern-day levels around 2.5 b.y. ago. This comment notes that many of the data sets cited by Ohmoto et al. as evidence for a relatively oxidized environment come from deep-ocean settings. This presents a possibility to reconcile some of these data and suggestions with the overwhelming evidence for an atmosphere free of oxygen at that time. Specifically, it is possible that deep-ocean waters were relatively oxidized with respect to certain redox pairs. These deep-ocean waters would have been more oxidized than surface waters, thus representing an "upside-down biosphere," as originally proposed 25 years ago by Jim Walker. JF - Special Paper - Geological Society of America AU - Domagal-Goldman, Shawn Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 97 EP - 99 PB - Geological Society of America (GSA), Boulder, CO VL - 504 SN - 0072-1077, 0072-1077 KW - sea water KW - oxygen KW - hydrothermal vents KW - deep-sea environment KW - marine sedimentation KW - oxides KW - Archean KW - geochemistry KW - Eh KW - Precambrian KW - iron minerals KW - sea surface water KW - paleoatmosphere KW - oxidation KW - sedimentation KW - solutes KW - hydrochemistry KW - depth KW - siderite KW - Great Oxidation Event KW - dissolved oxygen KW - marine environment KW - hydrogen KW - biosphere KW - anaerobic environment KW - carbonates KW - magnetite KW - bottom water KW - 12:Stratigraphy KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535203463?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Paper+-+Geological+Society+of+America&rft.atitle=The+upside-down+biosphere%3B+%22Evidence+for+the+partially+oxygenated+oceans+during+the+Archean+Eon%22%3B+discussion&rft.au=Domagal-Goldman%2C+Shawn&rft.aulast=Domagal-Goldman&rft.aufirst=Shawn&rft.date=2014-05-01&rft.volume=504&rft.issue=&rft.spage=97&rft.isbn=&rft.btitle=&rft.title=Special+Paper+-+Geological+Society+of+America&rft.issn=00721077&rft_id=info:doi/10.1130%2F2014.2504%2810%29 LA - English DB - GeoRef 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 - SuppNotes - For reference to original see Ohmoto, Hiroshi, et al., Geological Society of America Special Paper 504, p. 55-95, doi:10.1130/2014.2504(09), 2014 N1 - Last updated - 2014-06-13 N1 - CODEN - GSAPAZ N1 - SubjectsTermNotLitGenreText - anaerobic environment; Archean; biosphere; bottom water; carbonates; deep-sea environment; depth; dissolved oxygen; Eh; geochemistry; Great Oxidation Event; hydrochemistry; hydrogen; hydrothermal vents; iron minerals; magnetite; marine environment; marine sedimentation; oxidation; oxides; oxygen; paleoatmosphere; Precambrian; sea surface water; sea water; sedimentation; siderite; solutes DO - http://dx.doi.org/10.1130/2014.2504(10) ER - TY - JOUR T1 - Earth's early atmosphere and surface environment AN - 1535202854; 2014-039302 JF - Special Paper - Geological Society of America AU - Zahnle, Kevin AU - Ohmoto, Hiroshi AU - Kasting, James F AU - Rey, Patrice AU - Domagal-Goldman, Shawn AU - Cavosie, Aaron AU - van Krenendock, Martin J Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 49 EP - 53 PB - Geological Society of America (GSA), Boulder, CO VL - 504 SN - 0072-1077, 0072-1077 KW - serpentinization KW - Precambrian KW - oxygen KW - isotopes KW - isotope ratios KW - oxidation KW - mantle KW - atmosphere KW - continental crust KW - subduction KW - metasomatism KW - stable isotopes KW - ancient ice ages KW - plate tectonics KW - S-34/S-32 KW - hydrogen KW - sulfur KW - Archean KW - glacial geology KW - chemical composition KW - geochemistry KW - crust KW - degassing KW - 18:Solid-earth geophysics KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535202854?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Paper+-+Geological+Society+of+America&rft.atitle=Earth%27s+early+atmosphere+and+surface+environment&rft.au=Zahnle%2C+Kevin%3BOhmoto%2C+Hiroshi%3BKasting%2C+James+F%3BRey%2C+Patrice%3BDomagal-Goldman%2C+Shawn%3BCavosie%2C+Aaron%3Bvan+Krenendock%2C+Martin+J&rft.aulast=Zahnle&rft.aufirst=Kevin&rft.date=2014-05-01&rft.volume=504&rft.issue=&rft.spage=49&rft.isbn=&rft.btitle=&rft.title=Special+Paper+-+Geological+Society+of+America&rft.issn=00721077&rft_id=info:doi/10.1130%2F2014.2504%2808%29 LA - English DB - GeoRef 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 - Number of references - 6 N1 - PubXState - CO N1 - SuppNotes - For reference to original see Zahnle, Kevin and Catling, David, Geological Society of America Special Paper 504, p. 37-48, doi:10.1130/2014.2504(07), 2014 N1 - Last updated - 2014-06-13 N1 - CODEN - GSAPAZ N1 - SubjectsTermNotLitGenreText - ancient ice ages; Archean; atmosphere; chemical composition; continental crust; crust; degassing; geochemistry; glacial geology; hydrogen; isotope ratios; isotopes; mantle; metasomatism; oxidation; oxygen; plate tectonics; Precambrian; S-34/S-32; serpentinization; stable isotopes; subduction; sulfur DO - http://dx.doi.org/10.1130/2014.2504(08) ER - TY - JOUR T1 - Generation of Oligonucleotides Under Hydrothermal Conditions by Non-enzymatic Polymerization AN - 1534831713; 20083210 AB - We previously reported that 5'-mononucleotides organized within a multilamellar lipid matrix can produce oligomers in the anhydrous phase of hydration-dehydration (HD) cycles. However, hydrolysis of oligomers can occur during hydration, and it is important to better understand the steady state in which ester bond synthesis is balanced by hydrolysis. In order to study condensation products of mononucleotides and hydrolysis of their polymers, we established a simulation of HD cycles that would occur on the early Earth when volcanic land masses emerged from the ocean over 4 billion years ago. At this stage on early Earth, precipitation produced hydrothermal fields characterized by small aqueous pools undergoing evaporation and refilling at elevated temperatures. Here, we confirm that under these conditions, the chemical potential made available by cycles of hydration and dehydration is sufficient to drive synthesis of ester bonds. If 5'-mononucleotides are in solution at millimolar concentrations, then oligomers resembling RNA are synthesized and exist in a steady state with their monomers. Furthermore, if the mononucleotides can form complementary base pairs, then some of the products have properties suggesting that secondary structures are present, including duplex species stabilized by hydrogen bonds. JF - Journal of Molecular Evolution AU - DeGuzman, Veronica AU - Vercoutere, Wenonah AU - Shenasa, Hossein AU - Deamer, David AD - Advanced Studies Laboratory, NASA Ames Research Center, Moffett Field, CA, USA, deamer@soe.ucsc.edu Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 251 EP - 262 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 78 IS - 5 SN - 0022-2844, 0022-2844 KW - ASFA 3: Aquatic Pollution & Environmental Quality; Biochemistry Abstracts 2: Nucleic Acids; Genetics Abstracts KW - Hydration KW - Polymerization KW - Evaporation KW - Lipids KW - Oligonucleotides KW - Protein structure KW - Base pairs KW - Temperature effects KW - Atmospheric precipitations KW - molecular evolution KW - Secondary structure KW - Precipitation KW - Water temperature KW - Esters KW - Hydrolysis KW - Monomers KW - Condensation products KW - RNA KW - Hydrogen bonding KW - Oceans KW - Hydrothermal fields KW - Dehydration KW - G 07740:Evolution KW - Q5 08504:Effects on organisms KW - N 14830:RNA UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1534831713?accountid=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=Journal+of+Molecular+Evolution&rft.atitle=Generation+of+Oligonucleotides+Under+Hydrothermal+Conditions+by+Non-enzymatic+Polymerization&rft.au=DeGuzman%2C+Veronica%3BVercoutere%2C+Wenonah%3BShenasa%2C+Hossein%3BDeamer%2C+David&rft.aulast=DeGuzman&rft.aufirst=Veronica&rft.date=2014-05-01&rft.volume=78&rft.issue=5&rft.spage=251&rft.isbn=&rft.btitle=&rft.title=Journal+of+Molecular+Evolution&rft.issn=00222844&rft_id=info:doi/10.1007%2Fs00239-014-9623-2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 31 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Atmospheric precipitations; Hydration; Polymerization; Water temperature; Hydrolysis; Dehydration; Hydrothermal fields; Temperature effects; molecular evolution; Evaporation; Lipids; Secondary structure; Precipitation; Esters; Oligonucleotides; Protein structure; Monomers; Condensation products; RNA; Hydrogen bonding; Oceans; Base pairs DO - http://dx.doi.org/10.1007/s00239-014-9623-2 ER - TY - JOUR T1 - Connecting Satellite Observations with Water Cycle Variables Through Land Data Assimilation: Examples Using the NASA GEOS-5 LDAS AN - 1530975784; 19532896 AB - A land data assimilation system (LDAS) can merge satellite observations (or retrievals) of land surface hydrological conditions, including soil moisture, snow, and terrestrial water storage (TWS), into a numerical model of land surface processes. In theory, the output from such a system is superior to estimates based on the observations or the model alone, thereby enhancing our ability to understand, monitor, and predict key elements of the terrestrial water cycle. In practice, however, satellite observations do not correspond directly to the water cycle variables of interest. The present paper addresses various aspects of this seeming mismatch using examples drawn from recent research with the ensemble-based NASA GEOS-5 LDAS. These aspects include (1) the assimilation of coarse-scale observations into higher-resolution land surface models, (2) the partitioning of satellite observations (such as TWS retrievals) into their constituent water cycle components, (3) the forward modeling of microwave brightness temperatures over land for radiance-based soil moisture and snow assimilation, and (4) the selection of the most relevant types of observations for the analysis of a specific water cycle variable that is not observed (such as root zone soil moisture). The solution to these challenges involves the careful construction of an observation operator that maps from the land surface model variables of interest to the space of the assimilated observations. JF - Surveys in Geophysics AU - Reichle, Rolf H AU - De Lannoy, Gabrieelle JM AU - Forman, Barton A AU - Draper, Clara S AU - Liu, Qing AD - Global Modeling and Assimilation Office (Code 610.1), NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD, 20771, USA, rolf.reichle@nasa.gov Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 577 EP - 606 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 35 IS - 3 SN - 0169-3298, 0169-3298 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts KW - Remote Sensing KW - Remote sensing KW - Soil Water KW - Maps KW - Surface radiation temperature KW - Hydrologic Cycle KW - Hydrologic Models KW - Microwaves KW - Geophysics KW - Satellite Technology KW - Mathematical models KW - Snow KW - Hydrologic cycle KW - Satellite sensing KW - Moisture Content KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 0845:Water in soils KW - AQ 00006:Sewage UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1530975784?accountid=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=Surveys+in+Geophysics&rft.atitle=Connecting+Satellite+Observations+with+Water+Cycle+Variables+Through+Land+Data+Assimilation%3A+Examples+Using+the+NASA+GEOS-5+LDAS&rft.au=Reichle%2C+Rolf+H%3BDe+Lannoy%2C+Gabrieelle+JM%3BForman%2C+Barton+A%3BDraper%2C+Clara+S%3BLiu%2C+Qing&rft.aulast=Reichle&rft.aufirst=Rolf&rft.date=2014-05-01&rft.volume=35&rft.issue=3&rft.spage=577&rft.isbn=&rft.btitle=&rft.title=Surveys+in+Geophysics&rft.issn=01693298&rft_id=info:doi/10.1007%2Fs10712-013-9220-8 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 105 N1 - Last updated - 2015-05-13 N1 - SubjectsTermNotLitGenreText - Satellite sensing; Microwaves; Mathematical models; Snow; Remote sensing; Geophysics; Hydrologic cycle; Surface radiation temperature; Remote Sensing; Satellite Technology; Hydrologic Cycle; Hydrologic Models; Moisture Content; Soil Water; Maps DO - http://dx.doi.org/10.1007/s10712-013-9220-8 ER - TY - JOUR T1 - Invasive pulmonary aspergillosis in an immunocompetent patient with severe dengue fever AN - 1527439308 AB - We report a case of a 65-year-old female diagnosed with sever dengue fever. She started showing recovery from dengue fever with medical management. On day 6 of admission, she had leukocytosis, altered mental sensorium, and hemoptysis. Chest tomography showed air space consolidation with multiple nodules in the left upper and middle lobe sputum and bronchoalveolar lavage cultures were positive for Aspergillus flavus. The patient showed improvement with voriconazole and therapy was continued for 6 weeks. JF - Indian Journal of Critical Care Medicine AU - Nasa, Prashant AU - Yadav, Rohit AU - Nagrani, S AU - Raina, Sanjay AU - Gupta, Ankur AU - Jain, Shakti Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 323 EP - 325 CY - Mumbai PB - Medknow Publications & Media Pvt. Ltd. VL - 18 IS - 5 SN - 09725229 KW - Medical Sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1527439308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthcompleteshell&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Indian+Journal+of+Critical+Care+Medicine&rft.atitle=Invasive+pulmonary+aspergillosis+in+an+immunocompetent+patient+with+severe+dengue+fever&rft.au=Nasa%2C+Prashant%3BYadav%2C+Rohit%3BNagrani%2C+S%3BRaina%2C+Sanjay%3BGupta%2C+Ankur%3BJain%2C+Shakti&rft.aulast=Nasa&rft.aufirst=Prashant&rft.date=2014-05-01&rft.volume=18&rft.issue=5&rft.spage=323&rft.isbn=&rft.btitle=&rft.title=Indian+Journal+of+Critical+Care+Medicine&rft.issn=09725229&rft_id=info:doi/10.4103%2F0972-5229.132505 LA - English DB - ProQuest Central N1 - Copyright - Copyright Medknow Publications & Media Pvt Ltd May 2014 N1 - Last updated - 2016-06-11 DO - http://dx.doi.org/10.4103/0972-5229.132505 ER - TY - JOUR T1 - Northern Eurasian Heat Waves and Droughts AN - 1524410869; 19790023 AB - This article reviews the understanding of the characteristics and causes of northern Eurasian summertime heat waves and droughts. Additional insights into the nature of temperature and precipitation variability in Eurasia on monthly to decadal time scales and into the causes and predictability of the most extreme events are gained from the latest generation of reanalyses and from supplemental simulations with the NASA Goddard Earth Observing System model, version 5 (GEOS-5). Key new results are 1) the identification of the important role of summertime stationary Rossby waves in the development of the leading patterns of monthly Eurasian surface temperature and precipitation variability (including the development of extreme events such as the 2010 Russian heat wave); 2) an assessment of the mean temperature and precipitation changes that have occurred over northern Eurasia in the last three decades and their connections to decadal variability and global trends in SST; and 3) the quantification (via a case study) of the predictability of the most extreme simulated heat wave/drought events, with some focus on the role of soil moisture in the development and maintenance of such events. A literature survey indicates a general consensus that the future holds an enhanced probability of heat waves across northern Eurasia, while there is less agreement regarding future drought, reflecting a greater uncertainty in soil moisture and precipitation projections. Substantial uncertainties remain in the understanding of heat waves and drought, including the nature of the interactions between the short-term atmospheric variability associated with such extremes and the longer-term variability and trends associated with soil moisture feedbacks, SST anomalies, and an overall warming world. JF - Journal of Climate AU - Schubert, Siegfried D AU - Wang AU - Koster, Randal D AU - Suarez, Max J AU - Groisman, Pavel Ya AD - Global Modeling and Assimilation Office, NASA GSFC, Greenbelt, Maryland Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 3169 EP - 3207 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 27 IS - 9 SN - 0894-8755, 0894-8755 KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Variability KW - Soil Water KW - Drought KW - Wave interactions KW - Stationary Rossby waves KW - Sea surface temperature anomalies KW - Predictability KW - Eurasia KW - Waves KW - Sea surface temperatures KW - Droughts KW - Temperature effects KW - Mean temperatures KW - Atmospheric variability KW - Planetary waves KW - Climates KW - Temperature KW - Simulation KW - Freak waves KW - Precipitation KW - Extreme values KW - Wave reflection KW - Numerical simulations KW - Literature reviews KW - Heat KW - Precipitation variability KW - Moisture Content KW - Temperature trends KW - Heat waves KW - Soil moisture KW - Q2 09243:Structure, mechanics and thermodynamics KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - M2 556.14:Infiltration/Soil Moisture (556.14) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524410869?accountid=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=Northern+Eurasian+Heat+Waves+and+Droughts&rft.au=Schubert%2C+Siegfried+D%3BWang%3BKoster%2C+Randal+D%3BSuarez%2C+Max+J%3BGroisman%2C+Pavel+Ya&rft.aulast=Schubert&rft.aufirst=Siegfried&rft.date=2014-05-01&rft.volume=27&rft.issue=9&rft.spage=3169&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-13-00360.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Number of references - 135 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Temperature effects; Literature reviews; Planetary waves; Simulation; Wave reflection; Extreme values; Droughts; Wave interactions; Mean temperatures; Atmospheric variability; Freak waves; Drought; Precipitation; Stationary Rossby waves; Sea surface temperature anomalies; Predictability; Numerical simulations; Precipitation variability; Temperature trends; Heat waves; Soil moisture; Sea surface temperatures; Variability; Heat; Climates; Temperature; Moisture Content; Waves; Soil Water; Eurasia DO - http://dx.doi.org/10.1175/JCLI-D-13-00360.1 ER - TY - JOUR T1 - A Comparison of Climate Signal Trend Detection Uncertainty Analysis Methods AN - 1524409268; 19790028 AB - Two climate signal trend analysis methods are the focus of this paper. The uncertainty of trend estimate from these two methods is investigated using Monte Carlo simulation. Several theoretically and randomly generated series of white noise, first-order autoregressive and second-order autoregressive, are explored. The choice of method that is most appropriate for the time series of interest depends upon the autocorrelation structure of the series. If the structure has its autocorrelation coefficients decreased with increasing lags (i.e., an exponential decay pattern), then the method of Weatherhead et al. is adequate. If the structure exhibits a decreasing sinusoid pattern of coefficient with lags (or a damped sinusoid pattern) or a mixture of both exponential decay and damped sinusoid patterns, then the method of Leroy et al. is recommended. The two methods are then applied to the time series of monthly and globally averaged top-of-the-atmosphere (TOA) irradiances for the reflected solar shortwave and emitted longwave regions, using radiance observations made by Clouds and the Earths Radiant Energy System (CERES) instruments during March 2000 through June 2011. Examination of the autocorrelation structures indicates that the reflected shortwave region has an exponential decay pattern, while the longwave region has a mixture of exponential decay and damped sinusoid patterns. Therefore, it is recommended that the method of Weatherhead et al. is used for the series of reflected shortwave irradiances and that the method of Leroy et al. is used for the series of emitted longwave irradiances. JF - Journal of Climate AU - Phojanamongkolkij, Nipa AU - Kato, Seiji AU - Wielicki, Bruce AU - Taylor, Patrick C AU - Mlynczak, Martin G AD - Systems Engineering and Engineering Methods Branch, NASA Langley Research Center, Hampton, Virginia Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 3363 EP - 3376 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 27 IS - 9 SN - 0894-8755, 0894-8755 KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - Monte Carlo simulation KW - Solar observations KW - Acoustic waves KW - Monte Carlo method KW - Time series analysis KW - Solar irradiance KW - Clouds KW - Asteroids KW - Numerical simulations KW - Energy KW - Decay KW - Noise pollution KW - Solar energy KW - Trend analysis KW - P 7000:NOISE KW - M2 551.58:Climatology (551.58) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524409268?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Climate&rft.atitle=A+Comparison+of+Climate+Signal+Trend+Detection+Uncertainty+Analysis+Methods&rft.au=Phojanamongkolkij%2C+Nipa%3BKato%2C+Seiji%3BWielicki%2C+Bruce%3BTaylor%2C+Patrick+C%3BMlynczak%2C+Martin+G&rft.aulast=Phojanamongkolkij&rft.aufirst=Nipa&rft.date=2014-05-01&rft.volume=27&rft.issue=9&rft.spage=3363&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-13-00400.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Number of references - 18 N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Clouds; Numerical simulations; Asteroids; Solar observations; Acoustic waves; Monte Carlo method; Noise pollution; Time series analysis; Solar energy; Solar irradiance; Trend analysis; Monte Carlo simulation; Energy; Decay DO - http://dx.doi.org/10.1175/JCLI-D-13-00400.1 ER - TY - NEWS T1 - NASA to Conduct Unprecedented Twin Experiment AN - 1518747716 JF - UPI Space Daily AU - Dr. Tony Phillips for NASA Science News Y1 - 2014/04/24/ PY - 2014 DA - 2014 Apr 24 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518747716?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NASA+to+Conduct+Unprecedented+Twin+Experiment&rft.au=Dr.+Tony+Phillips+for+NASA+Science+News&rft.aulast=Dr.+Tony+Phillips+for+NASA+Science+News&rft.aufirst=&rft.date=2014-04-24&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-04-24 ER - TY - NEWS T1 - The Path to Mars AN - 1518747706 JF - UPI Space Daily AU - NASA Administrator Charlie Bolden Y1 - 2014/04/24/ PY - 2014 DA - 2014 Apr 24 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518747706?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=The+Path+to+Mars&rft.au=NASA+Administrator+Charlie+Bolden&rft.aulast=NASA+Administrator+Charlie+Bolden&rft.aufirst=&rft.date=2014-04-24&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-04-24 ER - TY - NEWS T1 - NASA Signs Deal With German, Canadian Partners To Test New Fuels AN - 1517836499 JF - UPI Space Daily AU - Karen Northon for NASA Aerospace News Y1 - 2014/04/20/ PY - 2014 DA - 2014 Apr 20 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1517836499?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NASA+Signs+Deal+With+German%2C+Canadian+Partners+To+Test+New+Fuels&rft.au=Karen+Northon+for+NASA+Aerospace+News&rft.aulast=Karen+Northon+for+NASA+Aerospace+News&rft.aufirst=&rft.date=2014-04-20&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-04-20 ER - TY - JOUR T1 - An Earth-sized planet in the habitable zone of a cool star AN - 1535203559; 2014-039256 AB - The quest for Earth-like planets is a major focus of current exoplanet research. Although planets that are Earth-sized and smaller have been detected, these planets reside in orbits that are too close to their host star to allow liquid water on their surfaces. We present the detection of Kepler-186f, a 1.11 + or - 0.14 Earth-radius planet that is the outermost of five planets, all roughly Earth-sized, that transit a 0.47 + or - 0.05 solar-radius star. The intensity and spectrum of the star's radiation place Kepler-186f in the stellar habitable zone, implying that if Kepler-186f has an Earth-like atmosphere and water at its surface, then some of this water is likely to be in liquid form. JF - Science AU - Quintana, Elisa V AU - Barclay, Thomas AU - Raymond, Sean N AU - Rowe, Jason F AU - Bolmont, Emeline AU - Caldwell, Douglas A AU - Howell, Steve B AU - Kane, Stephen R AU - Huber, Daniel AU - Crepp, Justin R AU - Lissauer, Jack J AU - Ciardi, David R AU - Coughlin, Jeffrey L AU - Everett, Mark E AU - Henze, Christopher E AU - Horch, Elliott AU - Isaacson, Howard AU - Ford, Eric B AU - Adams, Fred C AU - Still, Martin AU - Hunter, Roger C AU - Quarles, Billy AU - Selsis, Franck Y1 - 2014/04/18/ PY - 2014 DA - 2014 Apr 18 SP - 277 EP - 280 PB - American Association for the Advancement of Science, Washington, DC VL - 344 IS - 6181 SN - 0036-8075, 0036-8075 KW - water KW - Kepler 186f KW - extrasolar planets KW - orbits KW - atmosphere KW - astrobiology KW - size KW - exploration KW - planets KW - detection KW - habitability KW - stars KW - terrestrial comparison KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535203559?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=An+Earth-sized+planet+in+the+habitable+zone+of+a+cool+star&rft.au=Quintana%2C+Elisa+V%3BBarclay%2C+Thomas%3BRaymond%2C+Sean+N%3BRowe%2C+Jason+F%3BBolmont%2C+Emeline%3BCaldwell%2C+Douglas+A%3BHowell%2C+Steve+B%3BKane%2C+Stephen+R%3BHuber%2C+Daniel%3BCrepp%2C+Justin+R%3BLissauer%2C+Jack+J%3BCiardi%2C+David+R%3BCoughlin%2C+Jeffrey+L%3BEverett%2C+Mark+E%3BHenze%2C+Christopher+E%3BHorch%2C+Elliott%3BIsaacson%2C+Howard%3BFord%2C+Eric+B%3BAdams%2C+Fred+C%3BStill%2C+Martin%3BHunter%2C+Roger+C%3BQuarles%2C+Billy%3BSelsis%2C+Franck&rft.aulast=Quintana&rft.aufirst=Elisa&rft.date=2014-04-18&rft.volume=344&rft.issue=6181&rft.spage=277&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1249403 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 - 37 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-06-13 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - astrobiology; atmosphere; detection; exploration; extrasolar planets; habitability; Kepler 186f; orbits; planets; size; stars; terrestrial comparison; water DO - http://dx.doi.org/10.1126/science.1249403 ER - TY - JOUR T1 - Isotopic links between atmospheric chemistry and the deep sulphur cycle on Mars AN - 1535203511; 2014-039174 JF - Nature (London) AU - Franz, Heather B AU - Kim, Sang-Tae AU - Farquhar, James AU - Day, James M D AU - Economos, Rita C AU - McKeegan, Kevin D AU - Schmitt, Axel K AU - Irving, Anthony J AU - Hoek, Joost AU - Dottin, James, III Y1 - 2014/04/17/ PY - 2014 DA - 2014 Apr 17 SP - 364 EP - 368 PB - Macmillan Journals, London VL - 508 IS - 7496 SN - 0028-0836, 0028-0836 KW - nakhlite KW - stony meteorites KW - isotopes KW - Martian meteorites KW - isotope ratios KW - atmosphere KW - Mars KW - cosmochemistry KW - achondrites KW - stable isotopes KW - geochemical cycle KW - terrestrial planets KW - SNC Meteorites KW - planets KW - meteorites KW - shergottite KW - S-34/S-32 KW - sulfur cycle KW - sulfur KW - S-33/S-32 KW - geochemistry KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535203511?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Isotopic+links+between+atmospheric+chemistry+and+the+deep+sulphur+cycle+on+Mars&rft.au=Franz%2C+Heather+B%3BKim%2C+Sang-Tae%3BFarquhar%2C+James%3BDay%2C+James+M+D%3BEconomos%2C+Rita+C%3BMcKeegan%2C+Kevin+D%3BSchmitt%2C+Axel+K%3BIrving%2C+Anthony+J%3BHoek%2C+Joost%3BDottin%2C+James%2C+III&rft.aulast=Franz&rft.aufirst=Heather&rft.date=2014-04-17&rft.volume=508&rft.issue=7496&rft.spage=364&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature13175 L2 - http://www.nature.com/nature/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 32 N1 - Document feature - illus. N1 - Last updated - 2014-06-13 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - achondrites; atmosphere; cosmochemistry; geochemical cycle; geochemistry; isotope ratios; isotopes; Mars; Martian meteorites; meteorites; nakhlite; planets; S-33/S-32; S-34/S-32; shergottite; SNC Meteorites; stable isotopes; stony meteorites; sulfur; sulfur cycle; terrestrial planets DO - http://dx.doi.org/10.1038/nature13175 ER - TY - JOUR T1 - Sr, Nd and Pb isotopic and chemical compositions of central Deccan Traps lavas and relation to southwestern Deccan stratigraphy AN - 1612265528; 2014-081104 AB - Sr, Nd and Pb isotopic compositions, and major and trace element abundances of lavas in five central Deccan Traps sections are generally very similar to those of lavas in the southwestern Deccan (Western Ghats escarpment). The combination of strong isotopic and chemical similarities between lavas of the two regions indicates that they shared a closely similar petrogenesis. Our results indicate that, unlike many lavas in the northeastern Deccan, most of the lavas studied in the central Deccan sections can be grouped into different stratigraphic members and chemical types (CTs) belonging to four formations (Thakurvadi, Bhimashankar, Khandala, and Poladpur) present in the type sections of the Western Ghats. Bhimashankar- and Thakurvadi-type lavas are found in a section near Outram, whereas only Khandala-type lavas make up the Mhaishmal, Ellora and Ajanta sections to the east, and only Poladpur-type lavas are present in the easternmost section at Lonar. This west-east sequence is the same as that seen going upward in the Western Ghats stratigraphy, except that Bushe-type lavas, which are located stratigraphically between the Khandala and Poladpur formations in the Western Ghats, have not been found in this study. Overall, our results indicate that the Khandala and Poladpur formations extend over west-east distances of more than 300 km, and some individual members (e.g., the Dhak Dongar) may extend over as much as 500 km. The regional dip from Igatpuri in the southwest to Lonar in the east-central Deccan is less than 0.5 degrees to the east, which is similar to the southward regional dip in the southwestern Deccan. Near-horizontal flows in the central and southwestern Deccan areas suggest that post-Deccan tectonic activity has had limited effects on the studied area. Large volumes of basaltic lavas derived from eruptive centers in the western Deccan may have covered both the central and southwestern Deccan areas. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Asian Earth Sciences AU - Peng, Zhan X AU - Mahoney, John J AU - Vanderkluysen, Loyc AU - Hooper, Peter R Y1 - 2014/04/15/ PY - 2014 DA - 2014 Apr 15 SP - 83 EP - 94 PB - Elsevier, Oxford VL - 84 SN - 1367-9120, 1367-9120 KW - lithostratigraphy KW - flood basalts KW - volcanic rocks KW - isotopes KW - Cretaceous KW - igneous rocks KW - central Deccan Traps KW - geotraverses KW - lead KW - Deccan Traps KW - Outram India KW - India KW - Lonar India KW - Ellora India KW - major elements KW - Indian Peninsula KW - volcanism KW - basalts KW - chemostratigraphy KW - Bhimashankar Formation KW - rare earths KW - depositional environment KW - Thakurvadi Formation KW - chemical composition KW - Asia KW - vents KW - Ajanta India KW - Ghats KW - alkaline earth metals KW - petrology KW - lava flows KW - Poladpur Formation KW - Western Ghats KW - Mesozoic KW - paleoenvironment KW - lava KW - metals KW - eruptions KW - large igneous provinces KW - trace metals KW - neodymium KW - Mhaishmal India KW - Khandala Formation KW - strontium KW - 02C:Geochemistry of rocks, soils, and sediments KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612265528?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Asian+Earth+Sciences&rft.atitle=Sr%2C+Nd+and+Pb+isotopic+and+chemical+compositions+of+central+Deccan+Traps+lavas+and+relation+to+southwestern+Deccan+stratigraphy&rft.au=Peng%2C+Zhan+X%3BMahoney%2C+John+J%3BVanderkluysen%2C+Loyc%3BHooper%2C+Peter+R&rft.aulast=Peng&rft.aufirst=Zhan&rft.date=2014-04-15&rft.volume=84&rft.issue=&rft.spage=83&rft.isbn=&rft.btitle=&rft.title=Journal+of+Asian+Earth+Sciences&rft.issn=13679120&rft_id=info:doi/10.1016%2Fj.jseaes.2013.10.025 L2 - http://www.sciencedirect.com/science/journal/13679120 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 - 38 N1 - Document feature - illus. incl. 2 tables, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-10-16 N1 - SubjectsTermNotLitGenreText - Ajanta India; alkaline earth metals; Asia; basalts; Bhimashankar Formation; central Deccan Traps; chemical composition; chemostratigraphy; Cretaceous; Deccan Traps; depositional environment; Ellora India; eruptions; flood basalts; geotraverses; Ghats; igneous rocks; India; Indian Peninsula; isotopes; Khandala Formation; large igneous provinces; lava; lava flows; lead; lithostratigraphy; Lonar India; major elements; Mesozoic; metals; Mhaishmal India; neodymium; Outram India; paleoenvironment; petrology; Poladpur Formation; rare earths; strontium; Thakurvadi Formation; trace metals; vents; volcanic rocks; volcanism; Western Ghats DO - http://dx.doi.org/10.1016/j.jseaes.2013.10.025 ER - TY - JOUR T1 - Iron isotope fractionation during sulfide-rich felsic partial melting in early planetesimals AN - 1560082643; 2014-068950 AB - New Fe isotope data of feldspar-rich meteorites Graves Nunataks 06128 and 06129 (GRA 06128/9) reveal that they are the only known examples of crustal materials with isotopically light Fe isotope compositions (delta Fe56=-0.08+ or -0.06 ppm; delta (super 56) Fe is defined as the per mille deviation of a sample's (super 56) Fe/ (super 54) Fe ratio from the IRMM-014 standard) in the Solar System. In contrast, associated brachinites, as well as brachinite-like achondrites, have Fe isotope compositions (delta Fe56=+0.01+ or -0.02 ppm) that are isotopically similar to carbonaceous chondrites and the bulk terrestrial mantle. In order to understand the cause of Fe isotope variations in the GRA 06128/9 and brachinite parent body, we also report the Fe isotope compositions of metal, silicate and sulfide fractions from three ordinary chondrites (Semarkona, Kernouve, Saint-Severin). Metals from ordinary chondrites are enriched in the heavier isotopes of Fe (average delta Fe56=0.15 ppm), sulfide fractions are enriched in the lighter isotopes of Fe (average delta Fe56=-0.14 ppm), and the delta (super 56) Fe values of the silicates are coincident with that of the bulk rock (average delta Fe56=0.03 ppm). The enrichment of light isotopes of Fe isotopes in GRA 06128/9 is consistent with preferential melting of sulfides in precursor chondritic source materials leading to the formation of Fe-S-rich felsic melts. Conceptual models show that melt generation to form a GRA 06128/9 parental melt occurred prior to the onset of higher-temperature basaltic melting (<1200C) in a volatile-rich precursor and led to the generation of buoyant felsic melt with a strong Fe-S signature. These models not only reveal the origin of enrichment in light isotopes of Fe for GRA 06128/9, but are also consistent with petrological and geochemical observations, experimental studies for the origin of Fe-S-rich felsic melts, and for the cessation of early melting on some asteroidal parent bodies because of the effective removal of the major radioactive heat-source, (super 26) Al. The mode of origin for GRA 06128/9 contrasts strongly with crust formation on Earth, the Moon, Mars and other asteroids, where mantle differentiation and/or oxygen activity are the major controls on crustal Fe isotope compositions. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Wang, Kun AU - Day, James M D AU - Korotev, Randy L AU - Zeigler, Ryan A AU - Moynier, Frederic Y1 - 2014/04/15/ PY - 2014 DA - 2014 Apr 15 SP - 124 EP - 132 PB - Elsevier, Amsterdam VL - 392 SN - 0012-821X, 0012-821X KW - isotope fractionation KW - andesites KW - volcanic rocks KW - stony meteorites KW - isotopes KW - igneous rocks KW - partial melting KW - mantle KW - planetesimals KW - stable isotopes KW - melts KW - iron KW - meteorites KW - chondrites KW - GRA 06128 KW - isotope ratios KW - parent bodies KW - differentiation KW - GRA 06129 KW - felsic composition KW - achondrites KW - paired meteorites KW - Graves Nunataks Meteorites KW - metals KW - theoretical models KW - brachinite KW - Fe-56/Fe-54 KW - sulfides KW - crust KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560082643?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Iron+isotope+fractionation+during+sulfide-rich+felsic+partial+melting+in+early+planetesimals&rft.au=Wang%2C+Kun%3BDay%2C+James+M+D%3BKorotev%2C+Randy+L%3BZeigler%2C+Ryan+A%3BMoynier%2C+Frederic&rft.aulast=Wang&rft.aufirst=Kun&rft.date=2014-04-15&rft.volume=392&rft.issue=&rft.spage=124&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2014.02.022 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 - 65 N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-09-05 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - achondrites; andesites; brachinite; chondrites; crust; differentiation; Fe-56/Fe-54; felsic composition; GRA 06128; GRA 06129; Graves Nunataks Meteorites; igneous rocks; iron; isotope fractionation; isotope ratios; isotopes; mantle; melts; metals; meteorites; paired meteorites; parent bodies; partial melting; planetesimals; stable isotopes; stony meteorites; sulfides; theoretical models; volcanic rocks DO - http://dx.doi.org/10.1016/j.epsl.2014.02.022 ER - TY - JOUR T1 - Chirality of meteoritic free and IOM-derived monocarboxylic acids and implications for prebiotic organic synthesis AN - 1535201866; 2014-042080 AB - The origin of homochirality and its role in the development of life on Earth are among the most intriguing questions in science. It has been suggested that carbonaceous chondrites seeded primitive Earth with the initial organic compounds necessary for the origin of life. One of the strongest pieces of evidence supporting this theory is that certain amino acids in carbonaceous chondrites display a significant l-enantiomeric excess (ee), similar to those use by terrestrial life. Analyses of ee in meteoritic molecules other than amino acids would shed more light on the origins of homochirality. In this study we investigated the stereochemistry of two groups of compounds: (1) free monocarboxylic acids (MCAs) from CM2 meteorites LON 94101 and Murchison; and (2) the aliphatic side chains present in the insoluble organic matter (IOM) and extracted in the form of monocarboxylic acids (MCAs) from EET 87770 (CR2) and Orgueil (CI1). Contrary to the well-known ee observed for amino acids in meteorites, we found that meteoritic branched free and IOM-derived MCAs with 5-8 carbon atoms are essentially racemic. The racemic nature of these compounds is used to discuss the possible influence of ultraviolet circularly polarized light (UVCPL) and aqueous alterations on the parent body on chirality observed in in carbonaceous chondrites. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Aponte, Jose C AU - Tarozo, Rafael AU - Alexandre, Marcelo R AU - Alexander, Conel M O'D AU - Charnley, Steven B AU - Hallmann, Christian AU - Summons, Roger E AU - Huang, Yongsong Y1 - 2014/04/15/ PY - 2014 DA - 2014 Apr 15 SP - 1 EP - 12 PB - Elsevier, New York, NY VL - 131 SN - 0016-7037, 0016-7037 KW - stony meteorites KW - Orgueil Meteorite KW - isotopes KW - gas chromatograms KW - mass spectra KW - Elephant Moraine Meteorites KW - paleontology KW - life origin KW - Murchison Meteorite KW - meteorites KW - amino acids KW - carboxylic acids KW - ultraviolet spectra KW - EET 87770 KW - spectra KW - synthesis KW - chondrites KW - interstellar dust KW - CI chondrites KW - isotope ratios KW - biochemistry KW - cosmochemistry KW - biologic evolution KW - carbonaceous chondrites KW - solubility KW - molecular structure KW - organic compounds KW - organic acids KW - insoluble organic matter KW - cosmic dust KW - reagents KW - Antarctica KW - chromatograms KW - CM chondrites KW - 05B:Petrology of meteorites and tektites KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535201866?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Chirality+of+meteoritic+free+and+IOM-derived+monocarboxylic+acids+and+implications+for+prebiotic+organic+synthesis&rft.au=Aponte%2C+Jose+C%3BTarozo%2C+Rafael%3BAlexandre%2C+Marcelo+R%3BAlexander%2C+Conel+M+O%27D%3BCharnley%2C+Steven+B%3BHallmann%2C+Christian%3BSummons%2C+Roger+E%3BHuang%2C+Yongsong&rft.aulast=Aponte&rft.aufirst=Jose&rft.date=2014-04-15&rft.volume=131&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.01.035 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 - 62 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-06-13 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - amino acids; Antarctica; biochemistry; biologic evolution; carbonaceous chondrites; carboxylic acids; chondrites; chromatograms; CI chondrites; CM chondrites; cosmic dust; cosmochemistry; EET 87770; Elephant Moraine Meteorites; gas chromatograms; insoluble organic matter; interstellar dust; isotope ratios; isotopes; life origin; mass spectra; meteorites; molecular structure; Murchison Meteorite; organic acids; organic compounds; Orgueil Meteorite; paleontology; reagents; solubility; spectra; stony meteorites; synthesis; ultraviolet spectra DO - http://dx.doi.org/10.1016/j.gca.2014.01.035 ER - TY - NEWS T1 - The Opposition of Mars AN - 1515583808 JF - UPI Space Daily AU - Tony Phillips for NASA Science News Y1 - 2014/04/13/ PY - 2014 DA - 2014 Apr 13 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1515583808?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=The+Opposition+of+Mars&rft.au=Tony+Phillips+for+NASA+Science+News&rft.aulast=Tony+Phillips+for+NASA+Science+News&rft.aufirst=&rft.date=2014-04-13&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-04-13 ER - TY - JOUR T1 - Spectrum-driven planetary deglaciation due to increases in stellar luminosity AN - 1789750500; 2016-039395 AB - Distant planets in globally ice-covered, "snowball," states may depend on increases in their host stars' luminosity to become hospitable for surface life. Using a general circulation model, we simulated the equilibrium climate response of a planet to a range of instellations from an F-, G-, or M-dwarf star. The range of instellation that permits both complete ice cover and at least partially ice-free climate states is a measure of the climate hysteresis that a planet can exhibit. An ice-covered planet with high climate hysteresis would show a higher resistance to the initial loss of surface ice coverage with increases in instellation, and abrupt, extreme ice loss once deglaciation begins. Our simulations indicate that the climate hysteresis depends sensitively on the host star spectral energy distribution. Under fixed CO (sub 2) conditions, a planet orbiting an M-dwarf star exhibits a smaller climate hysteresis, requiring smaller instellation to initiate deglaciation than planets orbiting hotter, brighter stars. This is due to the higher absorption of near-infrared radiation by ice on the surfaces and greenhouse gases and clouds in the atmosphere of an M-dwarf planet. Increases in atmospheric CO (sub 2) further lower the climate hysteresis, as M-dwarf snowball planets exhibit a larger radiative response than G-dwarf snowball planets for the same increase in CO (sub 2) . For a smaller hysteresis, planets near the outer edge of the habitable zone will thaw earlier in their evolutionary history, and will experience a less abrupt transition out of global ice cover. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal. Letters AU - Shields, Aomawa L AU - Bitz, Cecilia M AU - Meadows, Victoria S AU - Joshi, Manoj M AU - Robinson, Tyler D Y1 - 2014/04/10/ PY - 2014 DA - 2014 Apr 10 EP - Paper no. L9 PB - IOP Publishing, Bristol VL - 785 IS - 1 SN - 2041-8205, 2041-8205 KW - general circulation models KW - hysteresis KW - extrasolar planets KW - three-dimensional models KW - stability KW - simulation KW - habitable zone KW - deglaciation KW - temperature KW - carbon dioxide KW - snowball planets KW - planets KW - stars KW - ice KW - dwarf stars KW - luminosity KW - climate KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789750500?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Astrophysical+Journal.+Letters&rft.atitle=Spectrum-driven+planetary+deglaciation+due+to+increases+in+stellar+luminosity&rft.au=Shields%2C+Aomawa+L%3BBitz%2C+Cecilia+M%3BMeadows%2C+Victoria+S%3BJoshi%2C+Manoj+M%3BRobinson%2C+Tyler+D&rft.aulast=Shields&rft.aufirst=Aomawa&rft.date=2014-04-10&rft.volume=785&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal.+Letters&rft.issn=20418205&rft_id=info:doi/10.1088%2F2041-8205%2F785%2F1%2FL9 L2 - http://iopscience.iop.org/2041-8205 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 43 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-05-19 N1 - SubjectsTermNotLitGenreText - carbon dioxide; climate; deglaciation; dwarf stars; extrasolar planets; general circulation models; habitable zone; hysteresis; ice; luminosity; planets; simulation; snowball planets; stability; stars; temperature; three-dimensional models DO - http://dx.doi.org/10.1088/2041-8205/785/1/L9 ER - TY - JOUR T1 - THE TIME-DEPENDENT CHEMISTRY OF COMETARY DEBRIS IN THE SOLAR CORONA AN - 1701487446; PQ0001795666 AB - Recent improvements in solar observations have greatly progressed the study of sungrazing comets. They can now be imaged along the entirety of their perihelion passage through the solar atmosphere, revealing details of their composition and structure not measurable through previous observations in the less volatile region of the orbit further from the solar surface. Such comets are also unique probes of the solar atmosphere. The debris deposited by sungrazers is rapidly ionized and subsequently influenced by the ambient magnetic field. Measuring the spectral signature of the deposited material highlights the topology of the magnetic field and can reveal plasma parameters such as the electron temperature and density. Recovering these variables from the observable data requires a model of the interaction of the cometary species with the atmosphere through which they pass. The present paper offers such a model by considering the time-dependent chemistry of sublimated cometary species as they interact with the solar radiation field and coronal plasma. We expand on a previous simplified model by considering the fully time-dependent solutions of the emitting species' densities. To compare with observations, we consider a spherically symmetric expansion of the sublimated material into the corona and convert the time-dependent ion densities to radial profiles. Using emissivities from the CHIANTI database and plasma parameters derived from a magnetohydrodynamic simulation leads to a spatially dependent emission spectrum that can be directly compared with observations. We find our simulated spectra to be consistent with observation. JF - Astrophysical Journal AU - Pesnell, W D AU - Bryans, P AD - NASA Goddard Space Flight Center, Code 671, Greenbelt, MD 20771, USA Y1 - 2014/04/10/ PY - 2014 DA - 2014 Apr 10 SP - 1 EP - 10 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 785 IS - 1 SN - 0004-637X, 0004-637X KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - comets: general KW - comets: individual (C/2011 W3) KW - Sun: corona KW - Sun: general KW - Corona KW - Solar atmospheric composition KW - Electron temperatures KW - Atmospheric pollution models KW - Coronal studies KW - Solar observations KW - Chemistry of comets KW - Temperature KW - Simulation KW - Solar radiation KW - Solar probes KW - Atmosphere KW - Comets KW - Emissivity KW - Magnetic fields KW - Numerical simulations KW - Magnetohydrodynamics KW - Atmospheric chemistry KW - Atmospheric chemistry models KW - Emissions KW - P 0000:AIR POLLUTION KW - M2 523.64:Comets (523.64) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701487446?accountid=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=THE+TIME-DEPENDENT+CHEMISTRY+OF+COMETARY+DEBRIS+IN+THE+SOLAR+CORONA&rft.au=Pesnell%2C+W+D%3BBryans%2C+P&rft.aulast=Pesnell&rft.aufirst=W&rft.date=2014-04-10&rft.volume=785&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%2F785%2F1%2F50 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Corona; Solar atmospheric composition; Coronal studies; Atmospheric pollution models; Electron temperatures; Solar observations; Chemistry of comets; Solar probes; Solar radiation; Comets; Magnetic fields; Numerical simulations; Magnetohydrodynamics; Atmospheric chemistry models; Emissivity; Atmospheric chemistry; Emissions; Temperature; Simulation; Atmosphere DO - http://dx.doi.org/10.1088/0004-637X/785/1/50 ER - TY - JOUR T1 - THE CONTRIBUTION OF z [lap] 6 SOURCES TO THE SPATIAL COHERENCE IN THE UNRESOLVED COSMIC NEAR-INFRARED AND X-RAY BACKGROUNDS AN - 1701479602; PQ0001795654 AB - A spatial clustering signal has been established in Spitzer/JRAC measurements of the unresolved cosmic near-infrared background (CIB) out to large angular scales, ~1[degrees]. This CIB signal, while significantly exceeding the contribution from the remaining known galaxies, was further found to be coherent at a highly statistically significant level with the unresolved soft cosmic X-ray background (CXB). This measurement probes the unresolved CXB to very faint source levels using deep near-IR source subtraction. We study contributions from extragalactic populations at low to intermediate redshifts to the measured positive cross-power signal of the CIB fluctuations with the CXB. We model the X-ray emission from active galactic nuclei (AGNs), normal galaxies, and hot gas residing in virialized structures, calculating their CXB contribution including their spatial coherence with all infrared emitting counterparts. We use a halo model framework to calculate the auto and cross-power spectra of the unresolved fluctuations based on the latest constraints of the halo occupation distribution and the biasing of AGNs, galaxies, and diffuse emission. At small angular scales ([lap]1'), the 4.5 mu m versus 0.5-2 keV coherence can be explained by shot noise from galaxies and AGNs. However, at large angular scales (~10'), we find that the net contribution from the modeled populations is only able to account for ~3% of the measured CIB x CXB cross-power. The discrepancy suggests that the CIB x CXB signal originates from the same unknown source population producing the CIB clustering signal out to ~1[degrees]. JF - Astrophysical Journal AU - Helgason, K AU - Cappelluti, N AU - HASINGER, G AU - KASHLINSKY, A AU - Ricotti, M AD - Department of Astronomy, University of Maryland, College Park, MD 20742, USA; Observational Cosmology Laboratory, Code 665, NASA Goddard Space Flight Center, Greenbelt MD 20771, USA, kari@astro.umd.edu Y1 - 2014/04/10/ PY - 2014 DA - 2014 Apr 10 SP - 1 EP - 16 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 785 IS - 1 SN - 0004-637X, 0004-637X KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - cosmic background radiation KW - dark ages, reionization, first stars KW - diffuse radiation KW - large-scale structure of universe KW - Active galactic nuclei KW - Halos KW - X-ray emissions KW - Acoustic waves KW - Galactic models KW - Emissions KW - Galaxies KW - Black holes KW - Statistical analysis KW - Galactic emissions KW - Noise pollution KW - P 0000:AIR POLLUTION KW - M2 524:Stars, Universe (524) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701479602?accountid=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=THE+CONTRIBUTION+OF+z+%5Blap%5D+6+SOURCES+TO+THE+SPATIAL+COHERENCE+IN+THE+UNRESOLVED+COSMIC+NEAR-INFRARED+AND+X-RAY+BACKGROUNDS&rft.au=Helgason%2C+K%3BCappelluti%2C+N%3BHASINGER%2C+G%3BKASHLINSKY%2C+A%3BRicotti%2C+M&rft.aulast=Helgason&rft.aufirst=K&rft.date=2014-04-10&rft.volume=785&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%2F785%2F1%2F38 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Halos; Active galactic nuclei; X-ray emissions; Acoustic waves; Galactic models; Statistical analysis; Black holes; Galaxies; Noise pollution; Galactic emissions; Emissions DO - http://dx.doi.org/10.1088/0004-637X/785/1/38 ER - TY - NEWS T1 - NSIDC, NASA Say Arctic Melt Season Lengthening, Ocean Rapidly Warming AN - 1513732798 JF - UPI Space Daily AU - Maria-Jose Vinas for NASA Earth Science News Y1 - 2014/04/09/ PY - 2014 DA - 2014 Apr 09 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1513732798?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NSIDC%2C+NASA+Say+Arctic+Melt+Season+Lengthening%2C+Ocean+Rapidly+Warming&rft.au=Maria-Jose+Vinas+for+NASA+Earth+Science+News&rft.aulast=Maria-Jose+Vinas+for+NASA+Earth+Science+News&rft.aufirst=&rft.date=2014-04-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-04-09 ER - TY - NEWS T1 - A Tetrad of Lunar Eclipses AN - 1513257030 JF - UPI Space Daily AU - Dr. Tony Phillips for NASA Science News Y1 - 2014/04/07/ PY - 2014 DA - 2014 Apr 07 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1513257030?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=A+Tetrad+of+Lunar+Eclipses&rft.au=Dr.+Tony+Phillips+for+NASA+Science+News&rft.aulast=Dr.+Tony+Phillips+for+NASA+Science+News&rft.aufirst=&rft.date=2014-04-07&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-04-08 ER - TY - NEWS T1 - Advancing the Technology Readiness Of SLS Adaptive Controls AN - 1511696887 JF - UPI Space Daily AU - Leslie Williams for NASA Armstrong Flight Research Center Y1 - 2014/04/02/ PY - 2014 DA - 2014 Apr 02 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1511696887?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Advancing+the+Technology+Readiness+Of+SLS+Adaptive+Controls&rft.au=Leslie+Williams+for+NASA+Armstrong+Flight+Research+Center&rft.aulast=Leslie+Williams+for+NASA+Armstrong+Flight+Research+Center&rft.aufirst=&rft.date=2014-04-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-04-02 ER - TY - JOUR T1 - Resolving the stellar sources of isotopically rare presolar silicate grains through Mg and Fe isotopic analyses AN - 1832600019; 693820-41 AB - We conducted multi-element isotopic analyses of 11 presolar silicate grains from the Acfer 094 meteorite having unusual O isotopic compositions. Eight grains are (super 18) O-rich, one is (super 16) O-rich, and two are extremely (super 17) O-rich. We constrained the grains' stellar sources by measuring their Si and Mg isotopic ratios, and also the (super 54) Fe/ (super 56) Fe and (super 57) Fe/ (super 56) Fe ratios for five grains. The Mg and Fe isotopic measurements were conducted after surrounding matrix grains were removed for more accurate ratios. Most of the (super 18) O-rich silicates had anomalous Mg isotopic ratios, and their combined isotopic constraints are consistent with origins in low-mass Type II supernovae (SNe II) rather than high-metallicity stars. The isotopic ratios of the (super 16) O-rich silicate are also consistent with an SN origin. Mixing small amounts of interior stellar material with the stellar envelope replicated all measured isotopic ratios except for (super 29) Si/ (super 28) Si and (super 54) Fe/ (super 56) Fe in some grains. The (super 29) Si/ (super 28) Si ratios of all SN-derived grains are matched by doubling the (super 29) Si yield in the Ne- and Si-burning zones. The (super 54) Fe/ (super 56) Fe ratios of the grains imply elemental fractionation in the Si/S zone, or introduction of isotopically solar Fe by secondary processing. The two highly (super 17) O-rich silicates exhibited significant (super 25) Mg and/or (super 26) Mg enrichments and their isotopic ratios are best explained by strong dilution of 1.15 M (sub �) CO nova matter. We estimate that approximately 12% and 1% of presolar silicates have SN and nova origins, respectively, similar to presolar SiC and oxides. This implies that asymptotic giant branch stars are the dominant dust producers in the galaxy. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Nguyen, Ann N AU - Messenger, Scott Y1 - 2014/04/01/ PY - 2014 DA - 2014 Apr 01 EP - Paper no. 149 PB - IOP Publishing for American Astronomical Society, Bristol VL - 784 IS - 2 SN - 0004-637X, 0004-637X KW - silicates KW - magnesium KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - mass spectra KW - Acfer 094 KW - silicon KW - stable isotopes KW - iron KW - asymptotic giant branch stars KW - meteorites KW - red giant stars KW - presolar grains KW - Mg-25/Mg-24 KW - spectra KW - chondrites KW - O-17/O-16 KW - alkaline earth metals KW - galactic chemical evolution KW - Si-29/Si-28 KW - isotope ratios KW - supernovas KW - Fe-57/Fe-56 KW - cosmochemistry KW - Acfer Meteorites KW - O-18/O-16 KW - carbonaceous chondrites KW - stars KW - Mg-26/Mg-24 KW - metals KW - NanoSIMS KW - Si-30/Si-28 KW - Fe-56/Fe-54 KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832600019?accountid=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=Resolving+the+stellar+sources+of+isotopically+rare+presolar+silicate+grains+through+Mg+and+Fe+isotopic+analyses&rft.au=Nguyen%2C+Ann+N%3BMessenger%2C+Scott&rft.aulast=Nguyen&rft.aufirst=Ann&rft.date=2014-04-01&rft.volume=784&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%2F784%2F2%2F149 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 - 83 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - Acfer 094; Acfer Meteorites; alkaline earth metals; asymptotic giant branch stars; carbonaceous chondrites; chondrites; cosmochemistry; Fe-56/Fe-54; Fe-57/Fe-56; galactic chemical evolution; ion probe data; iron; isotope ratios; isotopes; magnesium; mass spectra; metals; meteorites; Mg-25/Mg-24; Mg-26/Mg-24; NanoSIMS; O-17/O-16; O-18/O-16; oxygen; presolar grains; red giant stars; Si-29/Si-28; Si-30/Si-28; silicates; silicon; spectra; stable isotopes; stars; stony meteorites; supernovas DO - http://dx.doi.org/10.1088/0004-637X/784/2/149 ER - TY - JOUR T1 - The Drive to Life on Wet and Icy Worlds AN - 1827883504; PQ0003681241 AB - This paper presents a reformulation of the submarine alkaline hydrothermal theory for the emergence of life in response to recent experimental findings. The theory views life, like other self-organizing systems in the Universe, as an inevitable outcome of particular disequilibria. In this case, the disequilibria were two: (1) in redox potential, between hydrogen plus methane with the circuit-completing electron acceptors such as nitrite, nitrate, ferric iron, and carbon dioxide, and (2) in pH gradient between an acidulous external ocean and an alkaline hydrothermal fluid. Both CO2 and CH4 were equally the ultimate sources of organic carbon, and the metal sulfides and oxyhydroxides acted as protoenzymatic catalysts. The realization, now 50 years old, that membrane-spanning gradients, rather than organic intermediates, play a vital role in life's operations calls into question the idea of "prebiotic chemistry." It informs our own suggestion that experimentation should look to the kind of nanoengines that must have been the precursors to molecular motors-such as pyrophosphate synthetase and the like driven by these gradients-that make life work. It is these putative free energy or disequilibria converters, presumably constructed from minerals comprising the earliest inorganic membranes, that, as obstacles to vectorial ionic flows, present themselves as the candidates for future experiments. Key Words: Methanotrophy-Origin of life. Astrobiology 14, 308-343. The fixation of inorganic carbon into organic material (autotrophy) is a prerequisite for life and sets the starting point of biological evolution. (Fuchs, 2011) Further significant progress with the tightly membrane-bound H+-PPase family should lead to an increased insight into basic requirements for the biological transport of protons through membranes and its coupling to phosphorylation. (Baltscheffsky et al., 1999) JF - Astrobiology AU - Russell, Michael J AU - Barge, Laura M AU - Bhartia, Rohit AU - Bocanegra, Dylan AU - Bracher, Paul J AU - Branscomb, Elbert AU - Kidd, Richard AU - McGlynn, Shawn AU - Meier, David H AU - Nitschke, Wolfgang AU - Shibuya, Takazo AU - Vance, Steve AU - White, Lauren AU - Kanik, Isik AD - NASA Astrobiology Institute, JPL Icy Worlds, USA. Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 308 EP - 343 PB - Mary Ann Liebert, Inc., 2 Madison Ave Larchmont NY 10538-1962 United States VL - 14 IS - 4 SN - 1531-1074, 1531-1074 KW - ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts KW - Nitrate KW - Heavy metals KW - Organic carbon KW - Carbon sources KW - Hydrogen KW - Sulphides KW - Carbon KW - Phosphorylation KW - Autotrophy KW - Catalysts KW - Nitrite KW - pH effects KW - pyrophosphates KW - Methane KW - Protons KW - Biogeochemical cycle KW - Free energy KW - Sulfide KW - Vocalization behavior KW - Oceans KW - Carbon dioxide KW - Iron KW - Minerals KW - Evolution KW - Redox potential KW - Q1 08563:Fishing gear and methods KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1827883504?accountid=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=Astrobiology&rft.atitle=The+Drive+to+Life+on+Wet+and+Icy+Worlds&rft.au=Russell%2C+Michael+J%3BBarge%2C+Laura+M%3BBhartia%2C+Rohit%3BBocanegra%2C+Dylan%3BBracher%2C+Paul+J%3BBranscomb%2C+Elbert%3BKidd%2C+Richard%3BMcGlynn%2C+Shawn%3BMeier%2C+David+H%3BNitschke%2C+Wolfgang%3BShibuya%2C+Takazo%3BVance%2C+Steve%3BWhite%2C+Lauren%3BKanik%2C+Isik&rft.aulast=Russell&rft.aufirst=Michael&rft.date=2014-04-01&rft.volume=14&rft.issue=4&rft.spage=308&rft.isbn=&rft.btitle=&rft.title=Astrobiology&rft.issn=15311074&rft_id=info:doi/10.1089%2Fast.2013.1110 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Number of references - 472 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Sulphides; Methane; Biogeochemical cycle; Organic carbon; Autotrophy; Carbon dioxide; Free energy; Evolution; Redox potential; Nitrate; Heavy metals; Protons; Hydrogen; Carbon sources; Sulfide; Carbon; Vocalization behavior; Phosphorylation; Oceans; Catalysts; Nitrite; Minerals; pH effects; Iron; pyrophosphates DO - http://dx.doi.org/10.1089/ast.2013.1110 ER - TY - JOUR T1 - Management and climate contributions to satellite-derived active fire trends in the contiguous United States AN - 1703693717; 2015-075182 AB - Fires in croplands, plantations, and rangelands contribute significantly to fire emissions in the United States, yet are often overshadowed by wildland fires in efforts to develop inventories or estimate responses to climate change. Here we quantified decadal trends, interannual variability, and seasonality of Terra Moderate Resolution Imaging Spectroradiometer (MODIS) observations of active fires (thermal anomalies) as a function of management type in the contiguous U.S. during 2001-2010. We used the Monitoring Trends in Burn Severity database to identify active fires within the perimeter of large wildland fires and land cover maps to identify active fires in croplands. A third class of fires defined as prescribed/other included all residual satellite active fire detections. Large wildland fires were the most variable of all three fire types and had no significant annual trend in the contiguous U.S. during 2001-2010. Active fires in croplands, in contrast, increased at a rate of 3.4% per year. Cropland and prescribed/other fire types combined were responsible for 77% of the total active fire detections within the U.S and were most abundant in the south and southeast. In the west, cropland active fires decreased at a rate of 5.9% per year, likely in response to intensive air quality policies. Potential evaporation was a dominant regulator of the interannual variability of large wildland fires, but had a weaker influence on the other two fire types. Our analysis suggests it may be possible to modify landscape fire emissions within the U.S. by influencing the way fires are used in managed ecosystems. Abstract Copyright (2014), The Authors. JF - Journal of Geophysical Research: Biogeosciences AU - Lin, Hsiao-Wen AU - McCarty, Jessica L AU - Wang, Dongdong AU - Rogers, Brendan M AU - Morton, Douglas C AU - Collatz, G James AU - Jin, Yufang AU - Randerson, James T Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 645 EP - 660 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 4 SN - 2169-8953, 2169-8953 KW - United States KW - land cover KW - monitoring KW - statistical analysis KW - agriculture KW - ecosystems KW - satellite methods KW - climate change KW - observations KW - fires KW - spatial distribution KW - evaporation KW - land management KW - air KW - climate KW - remote sensing KW - MODIS KW - 20:Applied geophysics KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703693717?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Biogeosciences&rft.atitle=Management+and+climate+contributions+to+satellite-derived+active+fire+trends+in+the+contiguous+United+States&rft.au=Lin%2C+Hsiao-Wen%3BMcCarty%2C+Jessica+L%3BWang%2C+Dongdong%3BRogers%2C+Brendan+M%3BMorton%2C+Douglas+C%3BCollatz%2C+G+James%3BJin%2C+Yufang%3BRanderson%2C+James+T&rft.aulast=Lin&rft.aufirst=Hsiao-Wen&rft.date=2014-04-01&rft.volume=119&rft.issue=4&rft.spage=645&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Biogeosciences&rft.issn=21698953&rft_id=info:doi/10.1002%2F2013JG002382 L2 - http://www.wiley.com/WileyCDA/WileyTitle/productCd-JGRG.html 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 - 73 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-08-13 N1 - SubjectsTermNotLitGenreText - agriculture; air; climate; climate change; ecosystems; evaporation; fires; land cover; land management; MODIS; monitoring; observations; remote sensing; satellite methods; spatial distribution; statistical analysis; United States DO - http://dx.doi.org/10.1002/2013JG002382 ER - TY - JOUR T1 - Small fresh impact craters on asteroid 4 Vesta; a compositional and geological fingerprint AN - 1692744187; 2015-059409 AB - Small morphologically fresh impact craters (<10 km in diameter) on Vesta's surface with a photometrically distinct ejecta blanket are expected to represent fresh surface material and thus provide the opportunity to study the composition of the unweathered surface. Dawn-Framing Camera and Visual and Infrared Spectrometer (VIR) data reveal impact craters with bright, dark, and mixed, i.e., partly bright and dark, ejecta existing on Vesta's surface, which not only differ in the visible albedo from their surroundings but also in their composition. Differences in the composition are related to the visible albedo and/or the geographic location of the impact craters. Bright ejecta, only seen in the southern Vestan hemisphere, are dominated by howardite/eucrite-like material as expected for Vesta's upper crust. Dark ejecta associated with dark impact craters are dominated by a strongly absorbing, spectrally neutral compound, supporting an origin from carbon-rich impactors. Few impact craters of intermediate albedo in Vesta's southern hemisphere contain material resembling diogenites, which are expected to exist in the deeper parts of Vesta's interior. The geological settings suggest that the diogenite-like material represents a part of a layer of diogenitic material surrounding the Rheasilvia basin or local concentrations of diogenitic material as part of the ejecta excavated during the latter stage of the Rheasilvia impact event. The spectral differences between eucrite- and diogenite-dominated materials also could be verified due to spin-forbidden absorptions in the visible spectral range, which are known from laboratory spectra of pyroxenes, but, which have been identified in the VIR spectra of Vesta for the first time. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Stephan, Katrin AU - Jaumann, R AU - De Sanctis, Maria Cristina AU - Tosi, F AU - Ammannito, E AU - Krohn, K AU - Zambon, F AU - Marchi, S AU - Ruesch, O AU - Matz, K D AU - Preusker, F AU - Roatsch, T AU - Raymond, C A AU - Russell, C T Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 771 EP - 797 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 4 SN - 2169-9097, 2169-9097 KW - albedo KW - stony meteorites KW - impact features KW - asteroids KW - Rheasilvia Basin KW - optical spectra KW - Dawn Mission KW - infrared spectra KW - brightness KW - meteorites KW - photometry KW - howardite KW - carbon KW - spectra KW - carbonaceous composition KW - Vesta Asteroid KW - HED meteorites KW - diogenite KW - ejecta KW - achondrites KW - depth KW - size KW - morphology KW - Framing Camera KW - classification KW - eucrite KW - impact craters 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/1692744187?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Small+fresh+impact+craters+on+asteroid+4+Vesta%3B+a+compositional+and+geological+fingerprint&rft.au=Stephan%2C+Katrin%3BJaumann%2C+R%3BDe+Sanctis%2C+Maria+Cristina%3BTosi%2C+F%3BAmmannito%2C+E%3BKrohn%2C+K%3BZambon%2C+F%3BMarchi%2C+S%3BRuesch%2C+O%3BMatz%2C+K+D%3BPreusker%2C+F%3BRoatsch%2C+T%3BRaymond%2C+C+A%3BRussell%2C+C+T&rft.aulast=Stephan&rft.aufirst=Katrin&rft.date=2014-04-01&rft.volume=119&rft.issue=4&rft.spage=771&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004388 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 94 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2015-11-19 N1 - SubjectsTermNotLitGenreText - achondrites; albedo; asteroids; brightness; carbon; carbonaceous composition; classification; crust; Dawn Mission; depth; diogenite; ejecta; eucrite; Framing Camera; HED meteorites; howardite; impact craters; impact features; infrared spectra; meteorites; morphology; optical spectra; photometry; Rheasilvia Basin; size; spectra; stony meteorites; Vesta Asteroid DO - http://dx.doi.org/10.1002/2013JE004388 ER - TY - JOUR T1 - Atmospheric science: Desert dust and monsoon rain AN - 1618152523; 20109013 JF - Nature Geoscience AU - Lau, William AD - Earth Science Division of the NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 255 EP - 256 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 7 IS - 4 SN - 1752-0894, 1752-0894 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Atmospheric sciences KW - Dusts KW - Dust KW - Deserts KW - Rain KW - Monsoons KW - Q2 09243:Structure, mechanics and thermodynamics KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618152523?accountid=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=Nature+Geoscience&rft.atitle=Atmospheric+science%3A+Desert+dust+and+monsoon+rain&rft.au=Lau%2C+William&rft.aulast=Lau&rft.aufirst=William&rft.date=2014-04-01&rft.volume=7&rft.issue=4&rft.spage=255&rft.isbn=&rft.btitle=&rft.title=Nature+Geoscience&rft.issn=17520894&rft_id=info:doi/10.1038%2Fngeo2115 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Atmospheric sciences; Deserts; Dust; Monsoons; Rain; Dusts DO - http://dx.doi.org/10.1038/ngeo2115 ER - TY - JOUR T1 - Zircon U-Pb geochronology of the Mount Givens Granodiorite; implications for the genesis of large volumes of eruptible magma AN - 1618131900; 2014-086383 AB - The Mount Givens Granodiorite, a large pluton in the central Sierra Nevada batholith, California, is similar in area to zoned intrusive suites yet is comparatively chemically and texturally homogenous. New zircon U-Pb geochronology indicates that the pluton was constructed over at least 7 Ma from 97.92 + or - 0.06 Ma to 90.87 + or - 0.05 Ma. Combining the new geochronology with the exposed volume of the pluton yields an estimated magma flux of <0.001 km (super 3) /a. The geochronologic data are at odds with the previously speculated links between plutons such as the Mount Givens Granodiorite and large-volume homogeneous ignimbrites (often termed monotonous intermediates). Existing data indicate that large plutons accumulate at rates of < or =0.001 km (super 3) /a, 1-2 orders of magnitude less than fluxes calculated for dated monotonous intermediates. If monotonous intermediates are remobilized, erupted plutons accumulated at rates comparable to dated examples, they should preserve a record of zircon growth of up to 10 Ma. Alternatively, the long history of zircon growth recorded in plutons may be erased during the processes of reheating and remobilization that precede supervolcano eruption. However, zircon dissolution modeling, based on hypothetical temperature-time histories for preeruptive monotonous intermediates, indicates that rejuvenation events would not sufficiently dissolve zircon. We suggest that eruptions of monotonous intermediates occur during high magmatic flux events, leaving little behind in the intrusive rock record, whereas low fluxes favor pluton accumulation. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Frazer, Ryan E AU - Coleman, Drew S AU - Mills, Ryan D Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 2907 EP - 2924 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 4 SN - 2169-9313, 2169-9313 KW - zircon group KW - United States KW - silicates KW - U/Pb KW - igneous rocks KW - magmatism KW - Central California KW - zircon KW - Paleogene KW - Mount Givens Granodiorite KW - nesosilicates KW - Cenozoic KW - California KW - Tertiary KW - plutonic rocks KW - dates KW - granodiorites KW - orthosilicates KW - absolute age KW - 03:Geochronology KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618131900?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Zircon+U-Pb+geochronology+of+the+Mount+Givens+Granodiorite%3B+implications+for+the+genesis+of+large+volumes+of+eruptible+magma&rft.au=Frazer%2C+Ryan+E%3BColeman%2C+Drew+S%3BMills%2C+Ryan+D&rft.aulast=Frazer&rft.aufirst=Ryan&rft.date=2014-04-01&rft.volume=119&rft.issue=4&rft.spage=2907&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2013JB010716 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 - 32 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables, geol. sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - absolute age; California; Cenozoic; Central California; dates; granodiorites; igneous rocks; magmatism; Mount Givens Granodiorite; nesosilicates; orthosilicates; Paleogene; plutonic rocks; silicates; Tertiary; U/Pb; United States; zircon; zircon group DO - http://dx.doi.org/10.1002/2013JB010716 ER - TY - JOUR T1 - Ice surface morphology and flow on Malaspina Glacier, Alaska; implications for regional tectonics in the Saint Elias Orogen AN - 1545408469; 2014-053639 AB - The Saint Elias Mountains in southern Alaska are located at a structural syntaxis where the coastal thrust and fold belt of the Fairweather plate boundary intersects thrust faults and folds generated by collision of the Yakutat Terrane. The axial trace of this syntaxis extends southeastward out of the Saint Elias Mountains and beneath Malaspina Glacier where it is hidden from view and cannot be mapped using conventional methods. Here we examine the surface morphology and flow patterns of Malaspina Glacier to infer characteristics of the bedrock topography and organization of the syntaxis. Faults and folds beneath the eastern part of the glacier trend northwest and reflect dextral transpression near the terminus of the Fairweather fault system. Those beneath the western part of the glacier trend northeast and accommodate folding and thrust faulting during collision and accretion of the Yakutat Terrane. Mapping the location and geometry of the structural syntaxis provides important constraints on spatial variations in seismicity, fault kinematics, and crustal shortening beneath Malaspina Glacier, as well as the position of the collisional deformation front within the Yakutat Terrane. We also speculate that the geometrical complexity of intersecting faults within the syntaxis formed a barrier to rupture propagation during two regional Mw 8.1 earthquakes in September 1899. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Tectonics AU - Cotton, Michelle M AU - Bruhn, Ronald L AU - Sauber, Jeanne AU - Burgess, Evan AU - Forster, Richard R Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 581 EP - 595 PB - American Geophysical Union, Washington, DC VL - 33 IS - 4 SN - 0278-7407, 0278-7407 KW - United States KW - Malaspina Glacier KW - neotectonics KW - SAR KW - ice KW - syntaxis KW - propagation KW - tectonics KW - active faults KW - Fairweather Fault KW - seismotectonics KW - faults KW - systems KW - North America KW - Yakutat Terrane KW - plate collision KW - plate boundaries KW - magnitude KW - radar methods KW - glaciers KW - orogenic belts KW - glacial features KW - kinematics KW - crustal shortening KW - rupture KW - Agassiz Glacier KW - thrust faults KW - Saint Elias Mountains KW - Alaska KW - geomorphology KW - fold and thrust belts KW - earthquakes KW - remote sensing KW - 24:Quaternary geology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545408469?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Ice+surface+morphology+and+flow+on+Malaspina+Glacier%2C+Alaska%3B+implications+for+regional+tectonics+in+the+Saint+Elias+Orogen&rft.au=Cotton%2C+Michelle+M%3BBruhn%2C+Ronald+L%3BSauber%2C+Jeanne%3BBurgess%2C+Evan%3BForster%2C+Richard+R&rft.aulast=Cotton&rft.aufirst=Michelle&rft.date=2014-04-01&rft.volume=33&rft.issue=4&rft.spage=581&rft.isbn=&rft.btitle=&rft.title=Tectonics&rft.issn=02787407&rft_id=info:doi/10.1002%2F2013TC003381 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 - 55 N1 - PubXState - DC N1 - Document feature - illus. incl. geol. sketch map N1 - Last updated - 2014-07-17 N1 - CODEN - TCTNDM N1 - SubjectsTermNotLitGenreText - active faults; Agassiz Glacier; Alaska; crustal shortening; earthquakes; Fairweather Fault; faults; fold and thrust belts; geomorphology; glacial features; glaciers; ice; kinematics; magnitude; Malaspina Glacier; neotectonics; North America; orogenic belts; plate boundaries; plate collision; propagation; radar methods; remote sensing; rupture; Saint Elias Mountains; SAR; seismotectonics; syntaxis; systems; tectonics; thrust faults; United States; Yakutat Terrane DO - http://dx.doi.org/10.1002/2013TC003381 ER - TY - JOUR T1 - Using Jacobian sensitivities to assess a linearization of the relaxed Arakawa-Schubert convection scheme AN - 1540228395; 20139240 AB - The inclusion of linearized moist physics can increase the accuracy of 4D-Var data assimilation and adjoint-based sensitivity analysis. Moist processes such as convection can exhibit nonlinear behaviour. As a result, representation of these processes in a linear way requires much care; a straightforward linearization may yield a poor approximation to the behaviour of perturbations of interest and could contain numerical instability. Here, an extensive numerical study of the Jacobian of the relaxed Arakawa-Schubert (RAS) convection scheme is shown. A Jacobian based on perturbations at individual model levels can be used to understand the physical behaviour of the RAS scheme, predict how sensitive that behaviour is to the prognostic variables and determine the stability of a linearization of the scheme. The linearity of the scheme is also considered by making structured perturbations, constructed from the principle components of the model variables. Based on the behaviour of the Jacobian operator and the results when using structured perturbations, a suitable method for linearizing the RAS scheme is determined. For deep, strong convection, the structures of the RAS Jacobian are reasonably simple, the rate at which finite-amplitude estimates of the structures change with respect to input perturbations is small and the eigenmodes of the Jacobian are not prohibitively unstable. For deep convection, an exact linearization is therefore suitable. For shallow convection, the RAS scheme can be more sensitive to the input prognostic variables due to the faster time-scales and proximity to switches. Linearization of the RAS therefore requires some simplifications to smooth the behaviour for shallow convection. It is noted that the physical understanding of the scheme gained from examining the Jacobian provides a useful tool to the developers of nonlinear physical parametrizations. JF - Quarterly Journal of the Royal Meteorological Society AU - Holdaway, D AU - Errico, R AD - Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, MD, USA. Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 1319 EP - 1332 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 140 IS - 681 SN - 0035-9009, 0035-9009 KW - Oceanic Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Sensitivity Analysis KW - Convection KW - Yield KW - Sensitivity analysis KW - Convection development KW - Data assimilation KW - Instability KW - RAS KW - Modelling KW - M2 551.558:Vertical Air Motion (551.558) KW - SW 0810:General KW - O 4080:Pollution - Control and Prevention KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1540228395?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Quarterly+Journal+of+the+Royal+Meteorological+Society&rft.atitle=Using+Jacobian+sensitivities+to+assess+a+linearization+of+the+relaxed+Arakawa-Schubert+convection+scheme&rft.au=Holdaway%2C+D%3BErrico%2C+R&rft.aulast=Holdaway&rft.aufirst=D&rft.date=2014-04-01&rft.volume=140&rft.issue=681&rft.spage=1319&rft.isbn=&rft.btitle=&rft.title=Quarterly+Journal+of+the+Royal+Meteorological+Society&rft.issn=00359009&rft_id=info:doi/10.1002%2Fqj.2210 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Convection; RAS; Modelling; Sensitivity analysis; Convection development; Instability; Data assimilation; Sensitivity Analysis; Yield DO - http://dx.doi.org/10.1002/qj.2210 ER - TY - JOUR T1 - Simulations of Gravitational Stress on Normovolemic and Hypovolemic Men and Women AN - 1540228220; 20141602 AB - Background: Earth-based simulations of physiologic responses to space mission activities are needed to develop prospective countermeasures. To determine whether upright lower body positive pressure (LBPP) provides a suitable space mission simulation, we investigated the cardiovascular responses of normovolemic and hypovolemic men and women to supine and orthostatic stress induced by head-up tilt (HUT) and upright LBPP, representing standing in lunar, Martian, and Earth gravities. Methods: Six men and six women were tested in normovolemic and hypovolemic (furosemide, intravenous, 0.5 mg [middot] kg super(-1)) conditions. Continuous electrocardiogram, blood pressure, segmental bioimpedance, and stroke volume (echocardiography) were recorded supine and at lunar, Martian, and Earth gravities (10[degrees], 20[degrees], and 80[degrees] HUT vs. 20%, 40%, and 100% bodyweight upright LBPP), respectively. Cardiovascular responses were assessed from mean values, spectral powers, and spontaneous baroreflex parameters. Results: Hypovolemia reduced plasma volume by ~10% and stroke volume by ~25% at supine, and increasing orthostatic stress resulted in further reductions. Upright LBPP induced more plasma volume losses at simulated lunar and Martian gravities compared with HUT, while both techniques induced comparable central hypovolemia at each stress. Cardiovascular responses to orthostatic stress were comparable between HUT and upright LBPP in both normovolemic and hypovolemic conditions; however, hypovolemic blood pressure was greater during standing at 100% bodyweight compared to 80[degrees] HUT due to a greater increase of total peripheral resistance. Conclusions: The comparable cardiovascular response to HUT and upright LBPP support the use of upright LBPP as a potential model to simulate activity in lunar and Martian gravities. JF - Aviation, Space, and Environmental Medicine AU - Zhang, Qingguang AU - Knapp, Charles F AU - Stenger, Michael B AU - Patwardhan, Abhijit R AU - ELAYI, SAMY C AU - Wang, Siqi AU - Kostas, Vladimir I AU - Evans, Joyce M AD - Department of Biomedical Engineering, the Department of Cardiovascular Medicine, and Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, KY, and Wyle Science, Technology and Engineering Group, NASA Johnson Space Center, Houston, TX, jevans1@uky.edu Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 407 EP - 413 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 4 SN - 0095-6562, 0095-6562 KW - Health & Safety Science Abstracts KW - blood pressure regulation KW - hypovolemia KW - baroreflex KW - Males KW - Stress KW - Simulation KW - Females KW - Blood pressure KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1540228220?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Simulations+of+Gravitational+Stress+on+Normovolemic+and+Hypovolemic+Men+and+Women&rft.au=Zhang%2C+Qingguang%3BKnapp%2C+Charles+F%3BStenger%2C+Michael+B%3BPatwardhan%2C+Abhijit+R%3BELAYI%2C+SAMY+C%3BWang%2C+Siqi%3BKostas%2C+Vladimir+I%3BEvans%2C+Joyce+M&rft.aulast=Zhang&rft.aufirst=Qingguang&rft.date=2014-04-01&rft.volume=85&rft.issue=4&rft.spage=407&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3828.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 24 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Males; Simulation; Stress; Females; Blood pressure DO - http://dx.doi.org/10.3357/ASEM.3828.2014 ER - TY - JOUR T1 - Bungee Force Level, Stiffness, and Variation During Treadmill Locomotion in Simulated Microgravity AN - 1540228173; 20141609 AB - Introduction: Crewmembers performing treadmill exercise on the International Space Station must wear a harness with an external gravity replacement force that is created by elastomer bungees. The quantification of the total external force, displacement, stiffness, and force variation is important for understanding the forces applied to the crewmember during typical exercise. Methods: Data were collected during static trials in the laboratory from a single subject and four subjects were tested while walking at 1.34 m [middot] s super(-1) and running at 2.24 m [middot] s super(-1) and 3.13 m [middot] s super(-1) on a treadmill during simulated microgravity in parabolic flight. The external force was provided by bungees and carabiner clips in configurations commonly used by crewmembers. Total external force, displacement, and force variation in the bungee system were measured, from which stiffness was computed. Results: Mean external force ranged from 431 to 804 N (54-131% bodyweight) across subjects and conditions. Mean displacement was 4 to 8 cm depending upon gait speed. Mean stiffness was affected by bungee configuration and ranged from 1.73 to 29.20 N [middot] cm super(-1). Force variation for single bungee configurations was 2.61-4.48% of total external force and between 4.30-57.5% total external force for two-bungee configurations. Conclusions: The external force supplied to crew-members by elastomer bungees provided a range of loading levels with variations that occur throughout the gait cycle. The quantification of bungee-loading characteristics is important to better define the system currently used by crewmembers during exercise. JF - Aviation, Space, and Environmental Medicine AU - De Witt, John K AU - Schaffner, Grant AU - Ploutz-Snyder, Lori L AD - Universities Space Research Association, Houston, TX; University of Cincinnati, Cincinnati, OH; NASA Johnson Space Center, Houston, TX; Wyle Science, Technology and Engineering Group, 1290 Hercules, Ste. 120, Houston, TX 77058, john.k.dewitt@nasa.gov Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 449 EP - 455 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 4 SN - 0095-6562, 0095-6562 KW - Health & Safety Science Abstracts KW - exercise KW - treadmill KW - bungee force KW - countermeasures KW - Wear KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1540228173?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Bungee+Force+Level%2C+Stiffness%2C+and+Variation+During+Treadmill+Locomotion+in+Simulated+Microgravity&rft.au=De+Witt%2C+John+K%3BSchaffner%2C+Grant%3BPloutz-Snyder%2C+Lori+L&rft.aulast=De+Witt&rft.aufirst=John&rft.date=2014-04-01&rft.volume=85&rft.issue=4&rft.spage=449&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3217.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 10 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Wear DO - http://dx.doi.org/10.3357/ASEM.3217.2014 ER - TY - JOUR T1 - Cardiovascular Models of Simulated Moon and Mars Gravities: Head-Up Tilt vs. Lower Body Unweighting AN - 1540226583; 20141604 AB - Introduction: In this study we compare two models [head-up tilt (HUT) vs. body unweighting using lower body positive pressure (LBPP)] to simulate Moon, Mars, and Earth gravities. A literature search did not reveal any comparisons of this type performed previously. We hypothesized that segmental fluid volume shifts (thorax, abdomen, upper and lower leg), cardiac output, and blood pressure (BP), heart rate (HR), and total peripheral resistance to standing would be similar in the LBPP and HUT models. Methods: There were 21 subjects who were studied while supine (simulation of spaceflight) and standing at 100% (Earth), 40% (Mars), and 20% (Moon) bodyweight produced by LBPP in Alter-G and while supine and tilted at 80[degrees], 20[degrees], and 10[degrees] HUT (analogues of Earth, Mars, and Moon gravities, respectively). Results: Compared to supine, fluid shifts from the chest to the abdomen, increases in HR, and decreases in stroke volume were greater at 100% bodyweight than at reduced weights in response to both LBPP and HUT. Differences between the two models were found for systolic BP, diastolic BP, mean arterial BP, stroke volume, total peripheral resistance, and thorax and abdomen impedances, while HR, cardiac output, and upper and lower leg impedances were similar. Conclusions: Bodyweight unloading via both LBPP and HUT resulted in cardiovascular changes similar to those anticipated in actual reduced gravity environments. The LBPP model/Alter-G has the advantage of providing an environment that allows dynamic activity at reduced body-weight; however, the significant increase in blood pressures in the Alter-G may favor the HUT model. JF - Aviation, Space, and Environmental Medicine AU - Kostas, Vladimir I AU - Stenger, Michael B AU - Knapp, Charles F AU - Shapiro, Robert AU - Wang, Siqi AU - Diedrich, Andre AU - Evans, Joyce M AD - University of Kentucky, Lexington, KY; Wyle Science, Technology & Engineering Group, NASA-JSC, Houston, TX; Vanderbilt University School of Medicine, Nashville, TN, jevans1@uky.edu Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 414 EP - 419 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 4 SN - 0095-6562, 0095-6562 KW - Health & Safety Science Abstracts KW - alter-G KW - LBPP KW - orthostatic intolerance KW - Heart rate KW - Simulation KW - Blood pressure KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1540226583?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Cardiovascular+Models+of+Simulated+Moon+and+Mars+Gravities%3A+Head-Up+Tilt+vs.+Lower+Body+Unweighting&rft.au=Kostas%2C+Vladimir+I%3BStenger%2C+Michael+B%3BKnapp%2C+Charles+F%3BShapiro%2C+Robert%3BWang%2C+Siqi%3BDiedrich%2C+Andre%3BEvans%2C+Joyce+M&rft.aulast=Kostas&rft.aufirst=Vladimir&rft.date=2014-04-01&rft.volume=85&rft.issue=4&rft.spage=414&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3687.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 21 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Heart rate; Simulation; Blood pressure DO - http://dx.doi.org/10.3357/ASEM.3687.2014 ER - TY - JOUR T1 - Application of spectral analysis techniques in the intercomparison of aerosol data: Part III. Using combined PCA to compare spatiotemporal variability of MODIS, MISR, and OMI aerosol optical depth AN - 1529946523; 19790274 AB - Satellite measurements of global aerosol properties are very useful in constraining aerosol parameterization in climate models. The reliability of different data sets in representing global and regional aerosol variability becomes an essential question. In this study, we present the results of a comparison using combined principal component analysis (CPCA), applied to monthly mean, mapped (Level 3) aerosol optical depth (AOD) product from Moderate Resolution Imaging Spectroradiometer (MODIS), Multiangle Imaging Spectroradiometer (MISR), and Ozone Monitoring Instrument (OMI). This technique effectively finds the common space-time variability in the multiple data sets by decomposing the combined AOD field. The results suggest that all of the sensors capture the globally important aerosol regimes, including dust, biomass burning, pollution, and mixed aerosol types. Nonetheless, differences are also noted. Specifically, compared with MISR and OMI, MODIS variability is significantly higher over South America, India, and the Sahel. MODIS deep blue AOD has a lower seasonal variability in North Africa, accompanied by a decreasing trend that is not found in either MISR or OMI AOD data. The narrow swath of MISR results in an underestimation of dust variability over the Taklamakan Desert. The MISR AOD data also exhibit overall lower variability in South America and the Sahel. OMI does not capture the Russian wild fire in 2010 nor the phase shift in biomass burning over East South America compared to Central South America, likely due to cloud contamination and the OMI row anomaly. OMI also indicates a much stronger (boreal) winter peak in South Africa compared with MODIS and MISR. Key Points * CPCA successfully extracts coupled modes in multiple data sets * The comparison suggests good agreement among the three data sets * Differences in the CPCA modes are discussed and explained JF - Journal of Geophysical Research: Atmospheres AU - Li, Jing AU - Carlson, Barbara E AU - Lacis, Andrew A AD - NASA Goddard Institute for Space Studies, New York, New York, USA. Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 4017 EP - 4042 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 7 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; Aqualine Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources; Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - combined principal component analysis KW - aerosol data intercomparison KW - spatiotemporal variability KW - MODIS KW - MISR KW - OMI KW - Sensors KW - Contamination KW - Principal Component Analysis KW - Parameterization KW - India KW - Seasonal variability KW - Monitoring instruments KW - Principal component analysis KW - Aerosols KW - Biomass KW - Clouds KW - Principal components analysis KW - Burning KW - Eolian dust KW - Pollution monitoring KW - Variability KW - Ozone monitoring KW - Combustion products KW - China, People's Rep., Xinjiang, Taklamakan Desert KW - Dust KW - Optical analysis KW - Sulfur dioxide KW - MODIS (Moderate Resolution Imaging Spectrometer) KW - South Africa KW - Fires KW - Atmospheric particulates KW - Climate models KW - Pollution detection KW - Climates KW - Spectral analysis KW - Dusts KW - Satellites KW - Imaging techniques KW - Air pollution KW - South America KW - Incineration KW - Satellite data KW - Deserts KW - Optical depth of aerosols KW - Global aerosols KW - AQ 00001:Water Resources and Supplies KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 5080:Evaluation, processing and publication KW - P 0000:AIR POLLUTION KW - M2 551.581:Latitudinal Influences (551.581) KW - Q5 08502:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529946523?accountid=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=Application+of+spectral+analysis+techniques+in+the+intercomparison+of+aerosol+data%3A+Part+III.+Using+combined+PCA+to+compare+spatiotemporal+variability+of+MODIS%2C+MISR%2C+and+OMI+aerosol+optical+depth&rft.au=Li%2C+Jing%3BCarlson%2C+Barbara+E%3BLacis%2C+Andrew+A&rft.aulast=Li&rft.aufirst=Jing&rft.date=2014-04-01&rft.volume=119&rft.issue=7&rft.spage=4017&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD020538 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Pollution monitoring; Atmospheric particulates; Aerosols; Pollution detection; Contamination; Spectral analysis; Parameterization; Imaging techniques; Eolian dust; Clouds; Principal component analysis; Fires; Ozone monitoring; Satellite data; Climate models; Global aerosols; Optical depth of aerosols; Seasonal variability; MODIS (Moderate Resolution Imaging Spectrometer); Sensors; Combustion products; Biomass; Satellites; Dust; Optical analysis; Air pollution; Sulfur dioxide; Deserts; Principal components analysis; Burning; Monitoring instruments; Incineration; Variability; Principal Component Analysis; Climates; Dusts; South America; South Africa; China, People's Rep., Xinjiang, Taklamakan Desert; India DO - http://dx.doi.org/10.1002/2013JD020538 ER - TY - JOUR T1 - A multiple cave deposit assessment of suitability of speleothem isotopes for reconstructing palaeo-vegetation and palaeo-temperature AN - 1529795721; 2014-035147 AB - The suitability of speleothems for interpreting palaeoclimate is typically determined by using either the Hendy Test, overlapping analysis or long-term cave environment monitoring. However, in many cases, these methods are not applicable, because a speleothem lacks clearly traceable layers for the Hendy Test, it is difficult to obtain an overlapping speleothem nearby, or long-term cave monitoring is impractical. The authors propose a multiple cave deposit approach to assess the suitability of speleothems for palaeoclimate study. Speleothems collected from two sites within Raccoon Mountain Cave, Tennessee (USA) exhibit remarkable spatial variation (delta (super 13) C: -10.3 ppm to -2.2 ppm) over a relatively short distance (ca 260 m). Drip water delta (super 18) O values exhibit a seasonal precipitation signal at Site 1 and an annual signal at Site 2. Combining field observations, water isotope analysis and trace-element data, the authors propose that the speleothem formation at Site 1 and Site 2 tapped distinct sources of CO (sub 2) : (i) CO (sub 2) derived from overlying soils for Site 1; and (ii) limestone dissolved inorganic carbon induced by ground water dissolution for Site 2. Using fresh cave deposits (modern speleothem) delta (super 13) C (100% C3 vegetation) as an analogue, a simple model was developed to estimate land surface vegetation for speleothems. The speleothem formation temperature estimated using fresh cave deposit delta (super 18) O values generally reflects the mean annual temperature in this region. This study indicates that spatial variations in carbon isotopes could be caused by different carbon sources dominating in different parts of the cave, which should be taken into consideration by researchers when using speleothem delta (super 13) C values to reconstruct temporal palaeo-vegetation changes. This study demonstrates a practical sampling strategy for verifying suitability of speleothems for palaeo-vegetation and palaeo-temperature reconstructions by analysing multiple cave deposits, especially for cases in which the Hendy Test, parallel sampling and long-term monitoring of cave environment are not feasible. Abstract Copyright (2013), International Association of Sedimentologists. JF - Sedimentology AU - Li, Zhenghua AU - Driese, Steven G AU - Cheng, Hai Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 749 EP - 766 PB - Wiley-Blackwell, Oxford VL - 61 IS - 3 SN - 0037-0746, 0037-0746 KW - United States KW - Hamilton County Tennessee KW - terrestrial environment KW - oxygen KW - isotopes KW - stalactites KW - vegetation KW - paleoclimatology KW - stable isotopes KW - cave environment KW - geochemical indicators KW - Cenozoic KW - stalagmites KW - paleotemperature KW - carbon KW - Tennessee KW - depositional environment KW - geochemistry KW - speleothems KW - Quaternary KW - modern analogs KW - isotope ratios KW - C-13/C-12 KW - Raccoon Mountain Cave KW - O-18/O-16 KW - Pleistocene KW - reconstruction KW - solution features KW - 24:Quaternary geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529795721?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Sedimentology&rft.atitle=A+multiple+cave+deposit+assessment+of+suitability+of+speleothem+isotopes+for+reconstructing+palaeo-vegetation+and+palaeo-temperature&rft.au=Li%2C+Zhenghua%3BDriese%2C+Steven+G%3BCheng%2C+Hai&rft.aulast=Li&rft.aufirst=Zhenghua&rft.date=2014-04-01&rft.volume=61&rft.issue=3&rft.spage=749&rft.isbn=&rft.btitle=&rft.title=Sedimentology&rft.issn=00370746&rft_id=info:doi/10.1111%2Fsed.12078 L2 - http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-3091/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 - 2014-01-01 N1 - Number of references - 65 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2016-09-16 N1 - CODEN - SEDIAT N1 - SubjectsTermNotLitGenreText - C-13/C-12; carbon; cave environment; Cenozoic; depositional environment; geochemical indicators; geochemistry; Hamilton County Tennessee; isotope ratios; isotopes; modern analogs; O-18/O-16; oxygen; paleoclimatology; paleotemperature; Pleistocene; Quaternary; Raccoon Mountain Cave; reconstruction; solution features; speleothems; stable isotopes; stalactites; stalagmites; Tennessee; terrestrial environment; United States; vegetation DO - http://dx.doi.org/10.1111/sed.12078 ER - TY - JOUR T1 - The Doppler Aerosol Wind (DAWN) Airborne, Wind-Profiling Coherent-Detection Lidar System: Overview and Preliminary Flight Results AN - 1524414812; 19752501 AB - The first airborne wind measurements of a pulsed, 2-m solid-state, high-energy, wind-profiling lidar system for airborne measurements are presented. The laser pulse energy is the highest to date in an eye-safe airborne wind lidar system. This energy, the 10-Hz laser pulse rate, the 15-cm receiver diameter, and dual-balanced coherent detection together have the potential to provide much-improved lidar sensitivity to low aerosol backscatter levels compared to earlier airborne-pulsed coherent lidar wind systems. Problems with a laser-burned telescope secondary mirror prevented a full demonstration of the lidars capability, but the hardware, algorithms, and software were nevertheless all validated. A lidar description, relevant theory, and preliminary results of flight measurements are presented. JF - Journal of Atmospheric and Oceanic Technology AU - Kavaya, Michael J AU - Beyon, Jeffrey Y AU - Koch, Grady J AU - Petros, Mulugeta AU - Petzar, Paul J AU - Singh, Upendra N AU - Trieu, Bo C AU - Yu, Jirong AD - NASA Langley Research Center, Hampton, Virginia Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 826 EP - 842 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 31 IS - 4 SN - 0739-0572, 0739-0572 KW - Meteorological & Geoastrophysical Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Marine KW - Sensitivity KW - Aerosols KW - Backscatter KW - Wind measurement KW - Algorithms KW - Lidar KW - Computer programs KW - Telescopes KW - Wind measurements KW - Energy KW - Lidar applications KW - Lasers KW - LIDAR KW - Wind KW - M2 52:C. Astrophysics (52) KW - Q2 09244:Air-sea coupling KW - O 6020:Offshore Engineering and Operations KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524414812?accountid=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+Atmospheric+and+Oceanic+Technology&rft.atitle=The+Doppler+Aerosol+Wind+%28DAWN%29+Airborne%2C+Wind-Profiling+Coherent-Detection+Lidar+System%3A+Overview+and+Preliminary+Flight+Results&rft.au=Kavaya%2C+Michael+J%3BBeyon%2C+Jeffrey+Y%3BKoch%2C+Grady+J%3BPetros%2C+Mulugeta%3BPetzar%2C+Paul+J%3BSingh%2C+Upendra+N%3BTrieu%2C+Bo+C%3BYu%2C+Jirong&rft.aulast=Kavaya&rft.aufirst=Michael&rft.date=2014-04-01&rft.volume=31&rft.issue=4&rft.spage=826&rft.isbn=&rft.btitle=&rft.title=Journal+of+Atmospheric+and+Oceanic+Technology&rft.issn=07390572&rft_id=info:doi/10.1175%2FJTECH-D-12-00274.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Number of references - 35 N1 - Last updated - 2016-04-29 N1 - SubjectsTermNotLitGenreText - Aerosols; Backscatter; Wind measurement; LIDAR; Telescopes; Wind measurements; Lidar applications; Algorithms; Lasers; Computer programs; Sensitivity; Energy; Lidar; Wind; Marine DO - http://dx.doi.org/10.1175/JTECH-D-12-00274.1 ER - TY - JOUR T1 - Opportunities to Intercalibrate Radiometric Sensors from International Space Station AN - 1524414795; 19752515 AB - Highly accurate measurements of Earths thermal infrared and reflected solar radiation are required for detecting and predicting long-term climate change. Consideration is given to the concept of using the International Space Station to test instruments and techniques that would eventually be used on a dedicated mission, such as the Climate Absolute Radiance and Refractivity Observatory (CLARREO). In particular, a quantitative investigation is performed to determine whether it is possible to use measurements obtained with a highly accurate (0.3%, with 95% confidence) reflected solar radiation spectrometer to calibrate similar, less accurate instruments in other low Earth orbits. Estimates of numbers of samples useful for intercalibration are made with the aid of yearlong simulations of orbital motion. Results of this study support the conclusion that the International Space Station orbit is ideally suited for the purpose of intercalibration between spaceborne sensors. JF - Journal of Atmospheric and Oceanic Technology AU - Roithmayr, C M AU - Lukashin, C AU - Speth, P W AU - Young, D F AU - Wielicki, BA AU - Thome, K J AU - Kopp, G AD - NASA Langley Research Center, Hampton, Virginia Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 890 EP - 902 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 31 IS - 4 SN - 0739-0572, 0739-0572 KW - Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Marine KW - Sensors KW - Earth orbit KW - Climate change KW - Simulation KW - Intercalibration KW - Solar radiation KW - Space stations KW - Radiance KW - Numerical simulations KW - Refractive index KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development KW - Q2 09244:Air-sea coupling KW - O 6020:Offshore Engineering and Operations KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524414795?accountid=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+Atmospheric+and+Oceanic+Technology&rft.atitle=Opportunities+to+Intercalibrate+Radiometric+Sensors+from+International+Space+Station&rft.au=Roithmayr%2C+C+M%3BLukashin%2C+C%3BSpeth%2C+P+W%3BYoung%2C+D+F%3BWielicki%2C+BA%3BThome%2C+K+J%3BKopp%2C+G&rft.aulast=Roithmayr&rft.aufirst=C&rft.date=2014-04-01&rft.volume=31&rft.issue=4&rft.spage=890&rft.isbn=&rft.btitle=&rft.title=Journal+of+Atmospheric+and+Oceanic+Technology&rft.issn=07390572&rft_id=info:doi/10.1175%2FJTECH-D-13-00163.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Number of references - 22 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Radiance; Sensors; Earth orbit; Climate change; Intercalibration; Solar radiation; Refractive index; Space stations; Numerical simulations; Simulation; Marine DO - http://dx.doi.org/10.1175/JTECH-D-13-00163.1 ER - TY - JOUR T1 - Unfiltering Earth Radiation Budget Experiment (ERBE) Scanner Radiances Using the CERES Algorithm and Its Evaluation with Nonscanner Observations AN - 1524410862; 19752505 AB - The NOAA-9 Earth Radiation Budget Experiment (ERBE) scanner measured broadband shortwave, longwave, and total radiances from February 1985 through January 1987. These scanner radiances are reprocessed using the more recent Clouds and the Earths Radiant Energy System (CERES) unfiltering algorithm. The scene information, including cloud properties, required for reprocessing is derived using Advanced Very High Resolution Radiometer (AVHRR) data on board NOAA-9, while no imager data were used in the original ERBE unfiltering. The reprocessing increases the NOAA-9 ERBE scanner unfiltered longwave radiances by 1.4%-2.0% during daytime and 0.2%-0.3% during nighttime relative to those derived from the ERBE unfiltering algorithm. Similarly, the scanner unfiltered shortwave radiances increase by similar to 1% for clear ocean and land and decrease for all-sky ocean, land, and snow/ice by similar to 1%. The resulting NOAA-9 ERBE scanner unfiltered radiances are then compared with NOAA-9 nonscanner irradiances by integrating the ERBE scanner radiance over the nonscanner field of view. The comparison indicates that the integrated scanner radiances are larger by 0.9% for shortwave and 0.7% smaller for longwave. A sensitivity study shows that the one-standard-deviation uncertainties in the agreement are -2.5%, -1.2%, and -1.8% for the shortwave, nighttime longwave, and daytime longwave irradiances, respectively. The NOAA-9 and ERBS nonscanner irradiances are also compared using 2 years of data. The comparison indicates that the NOAA-9 nonscanner shortwave, nighttime longwave, and daytime longwave irradiances are 0.3% larger, 0.6% smaller, and 0.4% larger, respectively. The longer observational record provided by the ERBS nonscanner plays a critical role in tying the CERES-like NOAA-9 ERBE scanner dataset from the mid-1980s to the present-day CERES scanner data record. JF - Journal of Atmospheric and Oceanic Technology AU - Shrestha, Alok K AU - Kato, Seiji AU - Wong, Takmeng AU - Rutan, David A AU - Miller, Walter F AU - Rose, Fred G AU - Smith, GLouis AU - Bedka, Kristopher M AU - Minnis, Patrick AU - Fernandez, Jose R AD - Science Systems and Applications Inc., and NASA Langley Research Center, Hampton, Virginia Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 843 EP - 859 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 31 IS - 4 SN - 0739-0572, 0739-0572 KW - Meteorological & Geoastrophysical Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Marine KW - Ice KW - Sensitivity KW - Ocean-ice-atmosphere system KW - Mathematical models KW - Snow KW - Algorithms KW - Clouds KW - Radiometers KW - Radiation budget KW - Sea ice KW - Radiance KW - Radiation KW - Asteroids KW - Oceans KW - Energy KW - AVHRR (Advanced Very High Resolution Radiometer) KW - Budgets KW - Cloud properties KW - Q2 09243:Structure, mechanics and thermodynamics KW - M2 551.521:Radiation (551.521) KW - O 6020:Offshore Engineering and Operations KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524410862?accountid=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+Atmospheric+and+Oceanic+Technology&rft.atitle=Unfiltering+Earth+Radiation+Budget+Experiment+%28ERBE%29+Scanner+Radiances+Using+the+CERES+Algorithm+and+Its+Evaluation+with+Nonscanner+Observations&rft.au=Shrestha%2C+Alok+K%3BKato%2C+Seiji%3BWong%2C+Takmeng%3BRutan%2C+David+A%3BMiller%2C+Walter+F%3BRose%2C+Fred+G%3BSmith%2C+GLouis%3BBedka%2C+Kristopher+M%3BMinnis%2C+Patrick%3BFernandez%2C+Jose+R&rft.aulast=Shrestha&rft.aufirst=Alok&rft.date=2014-04-01&rft.volume=31&rft.issue=4&rft.spage=843&rft.isbn=&rft.btitle=&rft.title=Journal+of+Atmospheric+and+Oceanic+Technology&rft.issn=07390572&rft_id=info:doi/10.1175%2FJTECH-D-13-00072.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Number of references - 35 N1 - Last updated - 2015-08-19 N1 - SubjectsTermNotLitGenreText - Radiometers; Radiance; Ocean-ice-atmosphere system; Sea ice; Mathematical models; Snow; Clouds; Radiation budget; Asteroids; AVHRR (Advanced Very High Resolution Radiometer); Algorithms; Cloud properties; Sensitivity; Ice; Radiation; Energy; Oceans; Budgets; Marine DO - http://dx.doi.org/10.1175/JTECH-D-13-00072.1 ER - TY - JOUR T1 - The Fast Longwave and Shortwave Flux (FLASHFlux) Data Product: Single-Scanner Footprint Fluxes AN - 1520387571; 19715397 AB - The Clouds and the Earths Radiant Energy Systems (CERES) project utilizes radiometric measurements taken aboard the Terra and Aqua spacecrafts to derive the world-class data products needed for climate research. Achieving the exceptional fidelity of the CERES data products, however, requires a considerable amount of processing to assure quality and to verify accuracy and precision, which results in the CERES data being released more than 6 months after the satellite observations. For most climate studies such delays are of little consequence; however, there are a significant number of nearreal time uses for CERES data products. The Fast Longwave and Shortwave Radiative Flux (FLASHFlux) data product was therefore developed to provide a rapid release version of the CERES results, which could be made available to the research and applications communities within 1 week of the satellite observations by exchanging some accuracy for speed. FLASHFlux has both achieved this 1-week processing objective and demonstrated the ability to provide remarkably good agreement when compared with the CERES data products for both the instantaneous single-scanner footprint (SSF) fluxes and the time- and space-averaged (TISA) fluxes. This paper describes the methods used to expedite the production of the FLASHFlux SSF fluxes by utilizing data from the CERES and Moderate Resolution Imaging Spectroradiometer instruments, as well as other meteorological sources. This paper also reports on the validation of the FLASHFlux SSF results against ground-truth measurements and the intercomparison of FLASHFlux and CERES SSF results. A complementary paper will discuss the production and validation of the FLASHFlux TISA fluxes. JF - Journal of Applied Meteorology and Climatology AU - Kratz, David P AU - Stackhouse, Paul W, Jr AU - Gupta, Shashi K AU - Wilber, Anne C AU - Sawaengphokhai, Parnchai AU - McGarragh, Greg R AD - Science Directorate, NASA Langley Research Center, Hampton, Virginia Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 1059 EP - 1079 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 53 IS - 4 SN - 1558-8424, 1558-8424 KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts KW - Meteorological data KW - Remote sensing KW - Spacecraft KW - Satellites KW - Clouds KW - Satellite data KW - Asteroids KW - Energy KW - Meteorology KW - Climatology KW - ENA 03:Energy KW - M2 551.58:Climatology (551.58) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520387571?accountid=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+Applied+Meteorology+and+Climatology&rft.atitle=The+Fast+Longwave+and+Shortwave+Flux+%28FLASHFlux%29+Data+Product%3A+Single-Scanner+Footprint+Fluxes&rft.au=Kratz%2C+David+P%3BStackhouse%2C+Paul+W%2C+Jr%3BGupta%2C+Shashi+K%3BWilber%2C+Anne+C%3BSawaengphokhai%2C+Parnchai%3BMcGarragh%2C+Greg+R&rft.aulast=Kratz&rft.aufirst=David&rft.date=2014-04-01&rft.volume=53&rft.issue=4&rft.spage=1059&rft.isbn=&rft.btitle=&rft.title=Journal+of+Applied+Meteorology+and+Climatology&rft.issn=15588424&rft_id=info:doi/10.1175%2FJAMC-D-13-061.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Number of references - 59 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Clouds; Meteorological data; Satellite data; Asteroids; Climatology; Energy; Remote sensing; Meteorology; Spacecraft; Satellites DO - http://dx.doi.org/10.1175/JAMC-D-13-061.1 ER - TY - JOUR T1 - An Experimental Study of Spatial Variability of Rainfall AN - 1520374280; 19715427 AB - Spatial variability of rainfall was studied through a gauge network on the Delmarva Peninsula. The gauge network consists of 11 dual- or triple-tipping-bucket sites ranging from 1- to 150-km separation distances. The time of the tip (0.254 mm) was recorded to a datalogger, and a continuous dataset was available from all sites for over 5 yr (May 2005-July 2010). A three-parameter exponential function was fitted to the paired correlations and the resultant correlation distance was 8-13 km during summer and 51-85 km during winter. The correlation distances showed pronounced year-to-year variability as being 8-43 km and 13-67 km during spring and autumn, respectively. The airmass convection was the main weather system during summer while noreasters played an important role during winter. The 30-min integration and two-tip rain/no-rain threshold was selected for the base of this study. The correlation distance increased with longer integration periods and was 17 and 32 km for 30 min and 1 h, respectively. JF - Journal of Hydrometeorology AU - Tokay, Ali AU - Roche, Rigoberto J AU - Bashor, Paul G AD - Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, and NASA Goddard Space Flight Center, Greenbelt, Maryland Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 801 EP - 812 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 15 IS - 2 SN - 1525-755X, 1525-755X KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - Convection KW - Variability KW - Rainfall KW - Correlations KW - Convection development KW - Spatial variations KW - Networks KW - Spatial variability KW - Rain gauge networks KW - Weather KW - USA, Delaware, Delmarva Peninsula KW - Bases KW - Hydrometeorology KW - Hydrometeorological research KW - Rain KW - Q2 09243:Structure, mechanics and thermodynamics KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - M2 551.579.1:Water supply from precipitation (551.579.1) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520374280?accountid=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+Hydrometeorology&rft.atitle=An+Experimental+Study+of+Spatial+Variability+of+Rainfall&rft.au=Tokay%2C+Ali%3BRoche%2C+Rigoberto+J%3BBashor%2C+Paul+G&rft.aulast=Tokay&rft.aufirst=Ali&rft.date=2014-04-01&rft.volume=15&rft.issue=2&rft.spage=801&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1175%2FJHM-D-13-031.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Number of references - 17 N1 - Last updated - 2014-12-11 N1 - SubjectsTermNotLitGenreText - Convection; Spatial variations; Rainfall; Rain gauge networks; Hydrometeorological research; Correlations; Convection development; Spatial variability; Hydrometeorology; Weather; Variability; Bases; Networks; Rain; USA, Delaware, Delmarva Peninsula DO - http://dx.doi.org/10.1175/JHM-D-13-031.1 ER - TY - JOUR T1 - Effects of extreme obliquity variations on the habitability of exoplanets AN - 1520104113; 2014-030401 AB - We explore the impact of obliquity variations on planetary habitability in hypothetical systems with high mutual inclination. We show that large-amplitude, high-frequency obliquity oscillations on Earth-like exoplanets can suppress the ice-albedo feedback, increasing the outer edge of the habitable zone. We restricted our exploration to hypothetical systems consisting of a solar-mass star, an Earth-mass planet at 1 AU, and 1 or 2 larger planets. We verified that these systems are stable for 10 (super 8) years with N-body simulations and calculated the obliquity variations induced by the orbital evolution of the Earth-mass planet and a torque from the host star. We ran a simplified energy balance model on the terrestrial planet to assess surface temperature and ice coverage on the planet's surface, and we calculated differences in the outer edge of the habitable zone for planets with rapid obliquity variations. For each hypothetical system, we calculated the outer edge of habitability for two conditions: (1) the full evolution of the planetary spin and orbit and (2) the eccentricity and obliquity fixed at their average values. We recovered previous results that higher values of fixed obliquity and eccentricity expand the habitable zone, but we also found that obliquity oscillations further expand habitable orbits in all cases. Terrestrial planets near the outer edge of the habitable zone may be more likely to support life in systems that induce rapid obliquity oscillations as opposed to fixed-spin planets. Such planets may be the easiest to directly characterize with space-borne telescopes. K JF - Astrobiology AU - Armstrong, J C AU - Barnes, R AU - Domagal-Goldman, S AU - Breiner, J AU - Quinn, T R AU - Meadows, V S Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 277 EP - 291 PB - Mary Ann Liebert, Larchmont, NY VL - 14 IS - 4 SN - 1531-1074, 1531-1074 KW - albedo KW - obliquity of the ecliptic KW - extrasolar planets KW - orbits KW - astrobiology KW - torque KW - simulation KW - variations KW - temperature KW - eccentricity KW - terrestrial planets KW - planets KW - habitat KW - oscillations KW - N-body simulation KW - rotation KW - ice KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520104113?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Astrobiology&rft.atitle=Effects+of+extreme+obliquity+variations+on+the+habitability+of+exoplanets&rft.au=Armstrong%2C+J+C%3BBarnes%2C+R%3BDomagal-Goldman%2C+S%3BBreiner%2C+J%3BQuinn%2C+T+R%3BMeadows%2C+V+S&rft.aulast=Armstrong&rft.aufirst=J&rft.date=2014-04-01&rft.volume=14&rft.issue=4&rft.spage=277&rft.isbn=&rft.btitle=&rft.title=Astrobiology&rft.issn=15311074&rft_id=info:doi/10.1089%2Fast.2013.1129 L2 - http://www.liebertpub.com/publication.aspx?pub_id=99 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 44 N1 - PubXState - NY N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2014-05-01 N1 - SubjectsTermNotLitGenreText - albedo; astrobiology; eccentricity; extrasolar planets; habitat; ice; N-body simulation; obliquity of the ecliptic; orbits; oscillations; planets; rotation; simulation; temperature; terrestrial planets; torque; variations DO - http://dx.doi.org/10.1089/ast.2013.1129 ER - TY - JOUR T1 - Follow the plume; the habitability of Enceladus AN - 1520102717; 2014-030405 AB - The astrobiological exploration of other worlds in our Solar System is moving from initial exploration to more focused astrobiology missions. In this context, we present the case that the plume of Enceladus currently represents the best astrobiology target in the Solar System. Analysis of the plume by the Cassini mission indicates that the steady plume derives from a subsurface liquid water reservoir that contains organic carbon, biologically available nitrogen, redox energy sources, and inorganic salts. Furthermore, samples from the plume jetting out into space are accessible to a low-cost flyby mission. No other world has such well-studied indications of habitable conditions. Thus, the science goals that would motivate an Enceladus mission are more advanced than for any other Solar System body. The goals of such a mission must go beyond further geophysical characterization, extending to the search for biomolecular evidence of life in the organic-rich plume. This will require improved in situ investigations and a sample return. JF - Astrobiology AU - McKay, Christopher P AU - Anbar, Ariel D AU - Porco, Carolyn AU - Tsou, Peter Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 352 EP - 355 PB - Mary Ann Liebert, Larchmont, NY VL - 14 IS - 4 SN - 1531-1074, 1531-1074 KW - icy satellites KW - ammonium KW - plumes KW - aliphatic hydrocarbons KW - astrobiology KW - Mars KW - life origin KW - nitrogen KW - exploration KW - Cassini-Huygens Mission KW - sampling KW - carbon KW - satellites KW - Eh KW - water KW - protection KW - methane KW - alkanes KW - biomarkers KW - terrestrial planets KW - planets KW - habitat KW - organic compounds KW - detection KW - hydrocarbons KW - Enceladus Satellite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520102717?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Astrobiology&rft.atitle=Follow+the+plume%3B+the+habitability+of+Enceladus&rft.au=McKay%2C+Christopher+P%3BAnbar%2C+Ariel+D%3BPorco%2C+Carolyn%3BTsou%2C+Peter&rft.aulast=McKay&rft.aufirst=Christopher&rft.date=2014-04-01&rft.volume=14&rft.issue=4&rft.spage=352&rft.isbn=&rft.btitle=&rft.title=Astrobiology&rft.issn=15311074&rft_id=info:doi/10.1089%2Fast.2014.1158 L2 - http://www.liebertpub.com/publication.aspx?pub_id=99 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 27 N1 - PubXState - NY N1 - Last updated - 2014-05-01 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; ammonium; astrobiology; biomarkers; carbon; Cassini-Huygens Mission; detection; Eh; Enceladus Satellite; exploration; habitat; hydrocarbons; icy satellites; life origin; Mars; methane; nitrogen; organic compounds; planets; plumes; protection; sampling; satellites; terrestrial planets; water DO - http://dx.doi.org/10.1089/ast.2014.1158 ER - TY - JOUR T1 - Microclimate influences on vegetation water availability and net primary production in coastal ecosystems of Central California AN - 1516753203; 19532507 AB - Field sampling and satellite remote sensing were used to test the hypothesis that site microclimate variability leading to divergent soil water use by vegetation types is closely associated with variability in annual net primary productivity (NPP) at the landscape scale. A simulation model based on satellite observations of seasonal phenology was used to estimate NPP of grassland, shrubland, and conifer forest vegetation types on the Central California coast near Big Sur. Daily microclimate at the soil surface was monitored over 4 years (2008-2011) for each vegetation type to infer soil moisture controls on plant production. Grassland soils were found to have lower soil organic matter content and were subjected to extreme radiation and wind events, and thereby dry-down faster with daily spring-summer warming than do shrubland or redwood forest soils. This reduced moisture microclimate affected the water stress on grassland plants to reduce NPP fluxes from April to October each year on the Central Coast far sooner than for shrubland or redwood stands. Results from this study suggested that the satellite-observed canopy greenness variations represented can be used to quantify plant production in coastal ecosystems at the landscape scale of defined microclimate variation. JF - Landscape Ecology AU - Potter, Christopher AD - NASA Ames Research Center, Moffett Field, CA, 94035, USA, chris.potter@nasa.gov Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 677 EP - 687 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 29 IS - 4 SN - 0921-2973, 0921-2973 KW - ASFA 1: Biological Sciences & Living Resources; Oceanic Abstracts; Ecology Abstracts KW - Vegetation type KW - Remote sensing KW - Forests KW - Water availability KW - Primary production KW - Models KW - Radiation KW - Phenology KW - Microclimate KW - Sampling KW - Canopies KW - Wind KW - Coasts KW - Organic matter KW - Landscape KW - Vegetation KW - Soils (organic) KW - Satellites KW - Conifers KW - Grasslands KW - Water use KW - Coastal zone KW - INE, USA, California, Big Sur KW - Water stress KW - Soil moisture KW - O 1070:Ecology/Community Studies KW - Q1 08463:Habitat community studies KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1516753203?accountid=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=Landscape+Ecology&rft.atitle=Microclimate+influences+on+vegetation+water+availability+and+net+primary+production+in+coastal+ecosystems+of+Central+California&rft.au=Potter%2C+Christopher&rft.aulast=Potter&rft.aufirst=Christopher&rft.date=2014-04-01&rft.volume=29&rft.issue=4&rft.spage=677&rft.isbn=&rft.btitle=&rft.title=Landscape+Ecology&rft.issn=09212973&rft_id=info:doi/10.1007%2Fs10980-014-0002-6 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Number of references - 34 N1 - Last updated - 2015-08-19 N1 - SubjectsTermNotLitGenreText - Water use; Coastal zone; Phenology; Organic matter; Remote sensing; Canopies; Primary production; Vegetation type; Landscape; Vegetation; Forests; Soils (organic); Water availability; Satellites; Models; Conifers; Grasslands; Water stress; Radiation; Microclimate; Sampling; Soil moisture; Wind; Coasts; INE, USA, California, Big Sur DO - http://dx.doi.org/10.1007/s10980-014-0002-6 ER - TY - JOUR T1 - Global characteristics of porosity and density stratification within the lunar crust from GRAIL gravity and Lunar Orbiter Laser Altimeter topography data AN - 1560082648; 2014-069054 AB - The Gravity Recovery and Interior Laboratory (GRAIL) mission is providing unprecedentedly high-resolution gravity data. The gravity signal in relation to topography decreases from 100 km to 30 km wavelength, equivalent to a uniform crustal density of 2450 kg/m (super 3) that is 100 kg/m (super 3) smaller than the density required at 100 km. To explain such frequency-dependent behavior, we introduce rock compaction models under lithostatic pressure that yield radially stratified porosity (and thus density) and examine the depth extent of porosity. Our modeling and analysis support the assertion that the crustal density must vary from surface to deep crust by up to 500 kg/m (super 3) . We found that the surface density of megaregolith is around 2400 kg/m (super 3) with an initial porosity of 10-20%, and this porosity is eliminated at 10-20 km depth due to lithostatic overburden pressure. Our stratified density models provide improved fits to both GRAIL primary and extended mission data. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Han, Shin-Chan AU - Schmerr, Nicholas AU - Neumann, Gregory AU - Holmes, Simon Y1 - 2014/03/28/ PY - 2014 DA - 2014 Mar 28 SP - 1882 EP - 1889 PB - American Geophysical Union, Washington, DC VL - 41 IS - 6 SN - 0094-8276, 0094-8276 KW - Lunar Orbiter Laser Altimeter KW - laser methods KW - density KW - Moon KW - GRAIL Mission KW - geophysical methods KW - altimetry KW - porosity KW - gravity methods KW - Gravity Recovery and Interior Laboratory Mission KW - topography KW - stratification KW - lunar crust KW - LOLA KW - lithostatic pressure KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560082648?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Global+characteristics+of+porosity+and+density+stratification+within+the+lunar+crust+from+GRAIL+gravity+and+Lunar+Orbiter+Laser+Altimeter+topography+data&rft.au=Han%2C+Shin-Chan%3BSchmerr%2C+Nicholas%3BNeumann%2C+Gregory%3BHolmes%2C+Simon&rft.aulast=Han&rft.aufirst=Shin-Chan&rft.date=2014-03-28&rft.volume=41&rft.issue=6&rft.spage=1882&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL059378 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-09-05 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - altimetry; density; geophysical methods; GRAIL Mission; gravity methods; Gravity Recovery and Interior Laboratory Mission; laser methods; lithostatic pressure; LOLA; lunar crust; Lunar Orbiter Laser Altimeter; Moon; porosity; stratification; topography DO - http://dx.doi.org/10.1002/2014GL059378 ER - TY - JOUR T1 - The atmospheres of earthlike planets after giant impact events AN - 1859791077; 2017-003136 AB - It is now understood that the accretion of terrestrial planets naturally involves giant collisions, the moon-forming impact being a well-known example. In the aftermath of such collisions, the surface of the surviving planet is very hot and potentially detectable. Here we explore the atmospheric chemistry, photochemistry, and spectral signatures of post-giant-impact terrestrial planets enveloped by thick atmospheres consisting predominantly of CO (sub 2) and H (sub 2) O. The atmospheric chemistry and structure are computed self-consistently for atmospheres in equilibrium with hot surfaces with composition reflecting either the bulk silicate Earth (which includes the crust, mantle, atmosphere, and oceans) or Earth's continental crust. We account for all major molecular and atomic opacity sources including collision-induced absorption. We find that these atmospheres are dominated by H (sub 2) O and CO (sub 2) , while the formation of CH (sub 4) and NH (sub 3) is quenched because of short dynamical timescales. Other important constituents are HF, HCl, NaCl, and SO (sub 2) . These are apparent in the emerging spectra and can be indicative that an impact has occurred. The use of comprehensive opacities results in spectra that are a factor of two lower brightness temperature in the spectral windows than predicted by previous models. The estimated luminosities show that the hottest post-giant-impact planets will be detectable with near-infrared coronagraphs on the planned 30 m class telescopes. The 1-4 mu m will be most favorable for such detections, offering bright features and better contrast between the planet and a potential debris disk. We derive cooling timescales on the order of 10 (super 5-6) yr on the basis of the modeled effective temperatures. This leads to the possibility of discovering tens of such planets in future surveys. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Lupu, R E AU - Zahnle, Kevin AU - Marley, Mark S AU - Schaefer, Laura AU - Fegley, Bruce AU - Morley, Caroline AU - Cahoy, Kerri AU - Freedman, Richard AU - Fortney, Jonathan J Y1 - 2014/03/20/ PY - 2014 DA - 2014 Mar 20 EP - Paper no. 27 PB - IOP Publishing for American Astronomical Society, Bristol VL - 784 IS - 1 SN - 0004-637X, 0004-637X KW - ammonium ion KW - aliphatic hydrocarbons KW - mantle KW - continental crust KW - temperature KW - carbon dioxide KW - brightness KW - photometry KW - dynamics KW - hydrofluoric acid KW - greenhouse effect KW - chemical composition KW - inorganic acids KW - water KW - clouds KW - sulfur dioxide KW - sodium chloride KW - methane KW - accretion KW - extrasolar planets KW - telescope methods KW - photochemistry KW - atmosphere KW - alkanes KW - early solar system KW - terrestrial planets KW - models KW - planets KW - Earth-Moon couple KW - volatiles KW - organic compounds KW - giant impact hypothesis KW - hydrochloric acid KW - hydrocarbons KW - crust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859791077?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Astrophysical+Journal&rft.atitle=The+atmospheres+of+earthlike+planets+after+giant+impact+events&rft.au=Lupu%2C+R+E%3BZahnle%2C+Kevin%3BMarley%2C+Mark+S%3BSchaefer%2C+Laura%3BFegley%2C+Bruce%3BMorley%2C+Caroline%3BCahoy%2C+Kerri%3BFreedman%2C+Richard%3BFortney%2C+Jonathan+J&rft.aulast=Lupu&rft.aufirst=R&rft.date=2014-03-20&rft.volume=784&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F784%2F1%2F27 L2 - http://iopscience.iop.org/0004-637X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 125 N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2017-01-19 N1 - SubjectsTermNotLitGenreText - accretion; aliphatic hydrocarbons; alkanes; ammonium ion; atmosphere; brightness; carbon dioxide; chemical composition; clouds; continental crust; crust; dynamics; early solar system; Earth-Moon couple; extrasolar planets; giant impact hypothesis; greenhouse effect; hydrocarbons; hydrochloric acid; hydrofluoric acid; inorganic acids; mantle; methane; models; organic compounds; photochemistry; photometry; planets; sodium chloride; sulfur dioxide; telescope methods; temperature; terrestrial planets; volatiles; water DO - http://dx.doi.org/10.1088/0004-637X/784/1/27 ER - TY - JOUR T1 - Lunar mare volcanism; lateral heterogeneities in volcanic activity and relationship with crustal structure AN - 1656034493; 2014-027267 AB - Lunar mare basalts are spatially unevenly distributed, and their abundances differ between the nearside and farside of the Moon. Although mare asymmetry has been attributed to thickness variations in the low-density anorthositic crust, the eruptive mechanism of lunar magma remains unknown. In this study, we investigate the relationship between mare distribution and crustal thickness using geological and geophysical data obtained by the SELENE (Kaguya) and the Gravity Recovery and Interior Laboratory spacecraft, and quantitatively re-evaluate the influence of the anorthositic crust on magma eruption. We identify a lateral heterogeneity in the upper limit of crustal thickness that allows magma extrusion to the surface. In the Procellarum KREEP Terrane, where the surface abundances of heat-producing elements are extremely high, magmas can erupt in regions of crustal thickness below about 30 km. In contrast, magma eruptions are limited to regions of crustal thickness below about 20 km in other nearside regions, around 10 km in the South Pole-Aitken Basin and approximately 5 km in the farside Felspathic Highland Terrane. Such heterogeneity may result from lateral variations in magma production in the lunar mantle and/or crustal density. JF - Special Publication - Geological Society of London AU - Morota, Tomokatsu AU - Ishihara, Yoshiaki AU - Sasaki, Sho AU - Goossens, Sander AU - Matsumoto, Koji AU - Noda, Hirotomo AU - Araki, Hiroshi AU - Hanada, Hideo AU - Tazawa, Seiichi AU - Kikuchi, Fuyuhiko AU - Ishikawa, Toshiaki AU - Tsuruta, Seiitsu AU - Kamata, Shunichi AU - Otake, Hisashi AU - Haruyama, Junichi AU - Ohtake, Makiko Y1 - 2014/03/20/ PY - 2014 DA - 2014 Mar 20 SP - 127 EP - 138 PB - Geological Society of London, London VL - 401 IS - 1 SN - 0305-8719, 0305-8719 KW - volcanic rocks KW - density KW - igneous rocks KW - partial melting KW - lunar highlands KW - plutonic rocks KW - farside KW - volcanism KW - basalts KW - thickness KW - heterogeneity KW - geochemistry KW - Moon KW - magmatism KW - Oceanus Procellarum KW - SELENE KW - GRAIL KW - maria KW - Imbrian KW - anorthosite KW - South Pole-Aitken Basin KW - KREEP KW - magmas KW - eruptions KW - lunar crust KW - lunar mantle KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656034493?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Special+Publication+-+Geological+Society+of+London&rft.atitle=Lunar+mare+volcanism%3B+lateral+heterogeneities+in+volcanic+activity+and+relationship+with+crustal+structure&rft.au=Morota%2C+Tomokatsu%3BIshihara%2C+Yoshiaki%3BSasaki%2C+Sho%3BGoossens%2C+Sander%3BMatsumoto%2C+Koji%3BNoda%2C+Hirotomo%3BAraki%2C+Hiroshi%3BHanada%2C+Hideo%3BTazawa%2C+Seiichi%3BKikuchi%2C+Fuyuhiko%3BIshikawa%2C+Toshiaki%3BTsuruta%2C+Seiitsu%3BKamata%2C+Shunichi%3BOtake%2C+Hisashi%3BHaruyama%2C+Junichi%3BOhtake%2C+Makiko&rft.aulast=Morota&rft.aufirst=Tomokatsu&rft.date=2014-03-20&rft.volume=401&rft.issue=1&rft.spage=127&rft.isbn=&rft.btitle=&rft.title=Special+Publication+-+Geological+Society+of+London&rft.issn=03058719&rft_id=info:doi/10.1144%2FSP401.11 L2 - http://sp.lyellcollection.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 60 N1 - Document feature - illus. N1 - SuppNotes - Online First N1 - Last updated - 2015-02-19 N1 - CODEN - GSLSBW N1 - SubjectsTermNotLitGenreText - anorthosite; basalts; density; eruptions; farside; geochemistry; GRAIL; heterogeneity; igneous rocks; Imbrian; KREEP; lunar crust; lunar highlands; lunar mantle; magmas; magmatism; maria; Moon; Oceanus Procellarum; partial melting; plutonic rocks; remote sensing; SELENE; South Pole-Aitken Basin; thickness; volcanic rocks; volcanism DO - http://dx.doi.org/10.1144/SP401.11 ER - TY - JOUR T1 - Soil Dust Aerosols and Wind as Predictors of Seasonal Meningitis Incidence in Niger AN - 1551625388; 20395142 AB - Background: Epidemics of meningococcal meningitis are concentrated in sub-Saharan Africa during the dry season, a period when the region is affected by the Harmattan, a dry and dusty northeasterly trade wind blowing from the Sahara into the Gulf of Guinea. Objectives: We examined the potential of climate-based statistical forecasting models to predict seasonal incidence of meningitis in Niger at both the national and district levels. Data and methods: We used time series of meningitis incidence from 1986 through 2006 for 38 districts in Niger. We tested models based on data that would be readily available in an operational framework, such as climate and dust, population, and the incidence of early cases before the onset of the meningitis season in January-May. Incidence was used as a proxy for immunological state, susceptibility, and carriage in the population. We compared a range of negative binomial generalized linear models fitted to the meningitis data. Results: At the national level, a model using early incidence in December and averaged November-December zonal wind provided the best fit (pseudo-R2 = 0.57), with zonal wind having the greatest impact. A model with surface dust concentration as a predictive variable performed indistinguishably well. At the district level, the best spatiotemporal model included zonal wind, dust concentration, early incidence in December, and population density (pseudo-R2 = 0.41). Conclusions: We showed that wind and dust information and incidence in the early dry season predict part of the year-to-year variability of the seasonal incidence of meningitis at both national and district levels in Niger. Models of this form could provide an early-season alert that wind, dust, and other conditions are potentially conducive to an epidemic. Citation: Perez Garcia-Pando C, Stanton MC, Diggle PJ, Trzaska S, Miller RL, Perlwitz JP, Baldasano JM, Cuevas E, Ceccato P, Yaka P, Thomson MC. 2014. Soil dust aerosols and wind as predictors of seasonal meningitis incidence in Niger. Environ Health Perspect 122:679-686; http://dx.doi.org/10.1289/ehp.1306640 JF - Environmental Health Perspectives AU - Garcia-Pando, Carlos Perez AU - Stanton, Michelle C AU - Diggle, Peter J AU - Trzaska, Sylwia AU - Miller, Ron L AU - Perlwitz, Jan P AU - Baldasano, Jose M AU - Cuevas, Emilio AU - Ceccato, Pietro AU - Yaka, Pascal AU - Thomson, Madeleine C AD - NASA Goddard Institute for Space Studies, New York, New York, USA Y1 - 2014/03/17/ PY - 2014 DA - 2014 Mar 17 SP - 679 EP - 686 PB - US Government Printing Office, Superintendent of Documents, P.O. Box 371954 Pittsburgh PA 15250-7954 United States VL - 122 IS - 7 SN - 0091-6765, 0091-6765 KW - Water Resources Abstracts; Aqualine Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts; Health & Safety Science Abstracts KW - Prediction KW - Trade winds KW - Variability KW - Population density KW - Statistical analysis KW - Neisseria meningitidis KW - Model Testing KW - Time series analysis KW - Gulfs KW - Dust KW - Soil KW - Sulfur dioxide KW - Guinea KW - Seasonal variations KW - Wind KW - Atmospheric particulates KW - Aerosols KW - Epidemics KW - Climates KW - Climate KW - Dusts KW - Model Studies KW - Niger KW - Africa KW - Dry season KW - Wind data KW - Eolian dust KW - ASW, Caribbean Sea, Greater Antilles, Puerto Rico, Mona I., Cueva KW - SW 5010:Network design KW - Q5 08503:Characteristics, behavior and fate KW - Q2 09181:General KW - AQ 00008:Effects of Pollution KW - ENA 12:Oceans & Estuaries KW - H 12000:Epidemiology and Public Health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1551625388?accountid=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=Environmental+Health+Perspectives&rft.atitle=Soil+Dust+Aerosols+and+Wind+as+Predictors+of+Seasonal+Meningitis+Incidence+in+Niger&rft.au=Garcia-Pando%2C+Carlos+Perez%3BStanton%2C+Michelle+C%3BDiggle%2C+Peter+J%3BTrzaska%2C+Sylwia%3BMiller%2C+Ron+L%3BPerlwitz%2C+Jan+P%3BBaldasano%2C+Jose+M%3BCuevas%2C+Emilio%3BCeccato%2C+Pietro%3BYaka%2C+Pascal%3BThomson%2C+Madeleine+C&rft.aulast=Garcia-Pando&rft.aufirst=Carlos&rft.date=2014-03-17&rft.volume=122&rft.issue=7&rft.spage=679&rft.isbn=&rft.btitle=&rft.title=Environmental+Health+Perspectives&rft.issn=00916765&rft_id=info:doi/10.1289%2Fehp.1306640 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Last updated - 2015-05-13 N1 - SubjectsTermNotLitGenreText - Prediction; Atmospheric particulates; Aerosols; Epidemics; Statistical analysis; Population density; Dry season; Wind data; Eolian dust; Soil; Trade winds; Sulfur dioxide; Climate; Time series analysis; Seasonal variations; Dust; Wind; Variability; Climates; Model Testing; Gulfs; Dusts; Model Studies; Neisseria meningitidis; Niger; Guinea; Africa; ASW, Caribbean Sea, Greater Antilles, Puerto Rico, Mona I., Cueva DO - http://dx.doi.org/10.1289/ehp.1306640 ER - TY - JOUR T1 - Evaluation of linear, inviscid, viscous, and reduced-order modelling aeroelastic solutions of the AGARD 445.6 wing using root locus analysis AN - 1629354737; 20825186 AB - Reduced-order modelling (ROM) methods are applied to the Computational Fluid Dynamics (CFD)-based aeroelastic analysis of the AGARD 445.6 wing in order to gain insight regarding well-known discrepancies between the aeroelastic analyses and the experimental results. The results presented include aeroelastic solutions using the inviscid Computational Aeroelasticity Programme-Transonic Small Disturbance (CAP-TSD) code and the FUN3D code (Euler and Navier-Stokes). Full CFD aeroelastic solutions and ROM aeroelastic solutions, computed at several Mach numbers, are presented in the form of root locus plots in order to better reveal the aeroelastic root migrations with increasing dynamic pressure. Important conclusions are drawn from these results including the ability of the linear CAP-TSD code to accurately predict the entire experimental flutter boundary (repeat of analyses performed in the 1980s), that the Euler solutions at supersonic conditions indicate that the third mode is always unstable, and that the FUN3D Navier-Stokes solutions stabilize the unstable third mode seen in the Euler solutions. JF - International Journal of Computational Fluid Dynamics AU - Silva, Walter A AU - Chwalowski, Pawel AU - Perry, Boyd III AD - Aeroelasticity Branch, NASA, Hampton, VA, USA Y1 - 2014/03/16/ PY - 2014 DA - 2014 Mar 16 SP - 122 EP - 139 PB - Taylor & Francis Group Ltd., 2 Park Square Oxford OX14 4RN United Kingdom VL - 28 IS - 3-4 SN - 1061-8562, 1061-8562 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Evaluation KW - Hydrodynamics KW - Boundaries KW - Wings KW - Fluid dynamics KW - Roots KW - Migration KW - Model Studies KW - Modelling KW - Q2 09183:Physics and chemistry KW - SW 0540:Properties of water UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629354737?accountid=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=Evaluation+of+linear%2C+inviscid%2C+viscous%2C+and+reduced-order+modelling+aeroelastic+solutions+of+the+AGARD+445.6+wing+using+root+locus+analysis&rft.au=Silva%2C+Walter+A%3BChwalowski%2C+Pawel%3BPerry%2C+Boyd+III&rft.aulast=Silva&rft.aufirst=Walter&rft.date=2014-03-16&rft.volume=28&rft.issue=3-4&rft.spage=122&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Computational+Fluid+Dynamics&rft.issn=10618562&rft_id=info:doi/10.1080%2F10618562.2014.922179 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Fluid dynamics; Wings; Modelling; Evaluation; Hydrodynamics; Boundaries; Roots; Migration; Model Studies DO - http://dx.doi.org/10.1080/10618562.2014.922179 ER - TY - JOUR T1 - A GRACE-based water storage deficit approach for hydrological drought characterization AN - 1560084004; 2014-069045 AB - We present a quantitative approach for measuring hydrological drought occurrence and severity based on terrestrial water storage observations from NASA's Gravity Recovery and Climate Experiment (GRACE) satellite mission. GRACE measurements are applied by calculating the magnitude of the deviation of regional, monthly terrestrial water storage anomalies from the time series' monthly climatology, where negative deviations represent storage deficits. Monthly deficits explicitly quantify the volume of water required to return to normal water storage conditions. We combine storage deficits with event duration to calculate drought severity. Drought databases are referenced to identify meteorological drought events in the Amazon and Zambezi River basins and the southeastern United States and Texas regions. This storage deficit method clearly identifies hydrological drought onset, end, and duration; quantifies instantaneous severity and peak drought magnitude; and compares well with the meteorological drought databases. It also reveals information about the hydrological effects of meteorological drought on regional water storage. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Thomas, Alys C AU - Reager, John T AU - Famiglietti, James S AU - Rodell, Matthew Y1 - 2014/03/16/ PY - 2014 DA - 2014 Mar 16 SP - 1537 EP - 1545 PB - American Geophysical Union, Washington, DC VL - 41 IS - 5 SN - 0094-8276, 0094-8276 KW - hydrology KW - water storage KW - monthly variations KW - time series analysis KW - Zambezi Valley KW - surface water KW - statistical analysis KW - GRACE KW - satellite methods KW - drought KW - South America KW - Amazon River KW - Zambezi River KW - hydrodynamics KW - Africa KW - remote sensing KW - 21:Hydrogeology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560084004?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+GRACE-based+water+storage+deficit+approach+for+hydrological+drought+characterization&rft.au=Thomas%2C+Alys+C%3BReager%2C+John+T%3BFamiglietti%2C+James+S%3BRodell%2C+Matthew&rft.aulast=Thomas&rft.aufirst=Alys&rft.date=2014-03-16&rft.volume=41&rft.issue=5&rft.spage=1537&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2014GL059323 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 22 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-09-05 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - Africa; Amazon River; drought; GRACE; hydrodynamics; hydrology; monthly variations; remote sensing; satellite methods; South America; statistical analysis; surface water; time series analysis; water storage; Zambezi River; Zambezi Valley DO - http://dx.doi.org/10.1002/2014GL059323 ER - TY - JOUR T1 - Greenland ice sheet melt from MODIS and associated atmospheric variability AN - 1560082802; 2014-069048 AB - Daily June-July melt fraction variations over the Greenland ice sheet (GIS) derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) (2000-2013) are associated with atmospheric blocking forming an omega-shape ridge over the GIS at 500 hPa height. Blocking activity with a range of time scales, from synoptic waves breaking poleward ( or =5 days), brings warm subtropical air masses over the GIS controlling daily surface temperatures and melt. The temperature anomaly of these subtropical air mass intrusions is also important for melting. Based on the years with the greatest melt (2002 and 2012) during the MODIS era, the area-average temperature anomaly of 2 standard deviations above the 14 year June-July mean results in a melt fraction of 40% or more. Though the summer of 2007 had the most blocking days, atmospheric temperature anomalies were too small to instigate extreme melting. Abstract Copyright (2014), The Authors. JF - Geophysical Research Letters AU - Haekkinen, Sirpa AU - Hall, Dorothy K AU - Shuman, Christopher A AU - Worthen, Denise L AU - DiGirolamo, Nicolo E Y1 - 2014/03/16/ PY - 2014 DA - 2014 Mar 16 SP - 1600 EP - 1607 PB - American Geophysical Union, Washington, DC VL - 41 IS - 5 SN - 0094-8276, 0094-8276 KW - subglacial processes KW - Arctic region KW - Greenland ice sheet KW - atmosphere KW - satellite methods KW - ice sheets KW - temperature KW - Greenland KW - atmospheric circulation KW - melting KW - geographic information systems KW - information systems KW - glacial geology KW - remote sensing KW - MODIS KW - meltwater KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560082802?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Greenland+ice+sheet+melt+from+MODIS+and+associated+atmospheric+variability&rft.au=Haekkinen%2C+Sirpa%3BHall%2C+Dorothy+K%3BShuman%2C+Christopher+A%3BWorthen%2C+Denise+L%3BDiGirolamo%2C+Nicolo+E&rft.aulast=Haekkinen&rft.aufirst=Sirpa&rft.date=2014-03-16&rft.volume=41&rft.issue=5&rft.spage=1600&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2013GL059185 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 38 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2014-09-05 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - Arctic region; atmosphere; atmospheric circulation; geographic information systems; glacial geology; Greenland; Greenland ice sheet; ice sheets; information systems; melting; meltwater; MODIS; remote sensing; satellite methods; subglacial processes; temperature DO - http://dx.doi.org/10.1002/2013GL059185 ER - TY - JOUR T1 - Alluvial fans and megafans along the southern side of the Alps AN - 1529797484; 2014-036891 AB - The foreland basin of the southern European Alps is characterized by large fan-shaped alluvial systems fed by the main montane valleys and these depositional systems present an extent of 300-3000 km (super 2) , with a length of 30-70km. Most of them are megafans, characterized by evident longitudinal differentiation in which steep piedmont sector consists of amalgamated gravels, while the distal portion has a gradient <2 ppm and is dominated by fine sediments. The major depositional phase occurred between 26 and 19 kyr cal BP during the Last Glacial Maximum (LGM) marine lowstand, when the Alpine glaciers reached the plain and fed the related fluvioglacial systems. The easternmost megafans also partly extended on the Adriatic shelf whereas, west from Garda Lake, their downstream development was limited by the Po River plain. The thickness of LGM alluvial sedimentation ranges between 30 and 15m and pinches out about 25km off the present coast. Soon after ice decay, after 19-17 kyr cal BP, sediment delivery from Alpine catchments to the plain dramatically decreased and in the central Alps large intramontane lakes formed, trapping almost all the bedload. Thus, the ratio between sediment and water discharge dramatically decreased and an erosive phase affected the LGM megafans and fans, leading the rivers to entrench for tens of meters. The funneling effect created by the fluvial incisions allowed the gravels to arrive tens of kilometers further downstream than in the LGM. In the Venetian-Friulian megafans a single valley formed in the piedmont sector, while 2-5 incised valleys developed in the distal sector. These latter valleys have been almost completely filled by a depositional lobe formed in the last 8 kyr, partly triggered by Holocene sea-level rise. The Alpine tributaries of the river Po still flow along a single incised valley from their megafan apex to the junction with the Po and they have not yet been affected by sea-level influence. Abstract Copyright (2014) Elsevier, B.V. JF - Sedimentary Geology AU - Fontana, Alessandro AU - Mozzi, Paolo AU - Marchetti, Mauro Y1 - 2014/03/15/ PY - 2014 DA - 2014 Mar 15 SP - 150 EP - 171 PB - Elsevier, Amsterdam VL - 301 SN - 0037-0738, 0037-0738 KW - last glacial maximum KW - isotopes KW - northern Italy KW - Alps KW - Europe KW - digital terrain models KW - Holocene KW - Po Valley KW - Italy KW - Friuli-Venezia Giulia Italy KW - Southern Europe KW - Adriatic region KW - upper Pleistocene KW - Cenozoic KW - radioactive isotopes KW - Lombardy Italy KW - carbon KW - glacial environment KW - absolute age KW - Trentino-Alto Adige Italy KW - Quaternary KW - interglacial environment KW - cyclic processes KW - radar methods KW - Carnic Alps KW - size KW - Piemonte Italy KW - alluvial fans KW - Veneto Italy KW - Shuttle Radar Topography Mission KW - Pleistocene KW - C-14 KW - Eastern Alps KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529797484?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Sedimentary+Geology&rft.atitle=Alluvial+fans+and+megafans+along+the+southern+side+of+the+Alps&rft.au=Fontana%2C+Alessandro%3BMozzi%2C+Paolo%3BMarchetti%2C+Mauro&rft.aulast=Fontana&rft.aufirst=Alessandro&rft.date=2014-03-15&rft.volume=301&rft.issue=&rft.spage=150&rft.isbn=&rft.btitle=&rft.title=Sedimentary+Geology&rft.issn=00370738&rft_id=info:doi/10.1016%2Fj.sedgeo.2013.09.003 L2 - http://www.sciencedirect.com/science/journal/00370738 LA - English DB - GeoRef N1 - Conference title - AGU fall meeting 2012 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 - 177 N1 - Document feature - illus. incl. sects., 1 table, geol. sketch maps N1 - Last updated - 2014-08-14 N1 - CODEN - SEGEBX N1 - SubjectsTermNotLitGenreText - absolute age; Adriatic region; alluvial fans; Alps; C-14; carbon; Carnic Alps; Cenozoic; cyclic processes; digital terrain models; Eastern Alps; Europe; Friuli-Venezia Giulia Italy; glacial environment; Holocene; interglacial environment; isotopes; Italy; last glacial maximum; Lombardy Italy; northern Italy; Piemonte Italy; Pleistocene; Po Valley; Quaternary; radar methods; radioactive isotopes; Shuttle Radar Topography Mission; size; Southern Europe; Trentino-Alto Adige Italy; upper Pleistocene; Veneto Italy DO - http://dx.doi.org/10.1016/j.sedgeo.2013.09.003 ER - TY - JOUR T1 - Shallow subsurface stratigraphy and alluvial architecture of the Kosi and Gandak Megafans in the Himalayan foreland basin, India AN - 1529797284; 2014-036890 AB - The Kosi and the Gandak are two major Himalayan tributaries of the Ganga River in the north Bihar plains India. With a large hinterland in the Nepal Himalaya, both these rivers have generated megafans in the plains over the Quaternary time scale. Both these rivers are known to be highly dynamic and sediment-charged. A few conceptual models and limited field data suggested that these megafans have produced thick sand sheets over Late Quaternary period but these ideas have remained speculative and there is no data on the size and dimension of these sand bodies. This paper attempts to reconstruct the subsurface stratigraphy and alluvial architecture for the upper approximately 100m of the megafans based on electrical resistivity soundings, borehole data and drill cores. Alluvial architecture of the Kosi megafan shows significant variability from proximal to medial parts of the fan in terms of sediment grain size and layer thicknesses. While the medial part shows approximately 20-30m thick medium to coarse sand sheets which are laterally stacked, the proximal part of the fan has a dominantly gravel unit below approximately 15m depth that is underlain and overlain by medium to coarse sand units. Further, the medial fan also shows significant vertical and lateral variability in alluvial stratigraphy. The near-surface (<20m depth) deposits from the Kosi megafan have pockets of clay and silt within large amalgamated sand bodies whereas the shallow sub-surface (50-100m depth) sediments are largely sandy and devoid of clay and silt pockets. Alluvial architecture of the Gandak megafan shows two major lithounits; the upper fan succession has a higher stacking density of smaller sand bodies perhaps reflecting the migratory behavior of the river whereas the lower succession shows narrow but thick sand fills reflecting incised channels. The western part of the Gandak megafan has more abundant sand bodies compared to the eastern side of the river along both transects. There are no significant differences between proximal and medial transects across the Gandak megafan. The absence of gravel deposits in the shallow subsurface of the Gandak megafan may be attributed to the presence of a prominent intermontane valley in the hinterland of the Gandak river which has acted as a 'sediment filter' thereby trapping most of the coarser fraction. On the other hand, the Kosi river exits directly through the mountain front, and therefore, has been able to transport gravels into the plains in pre-historic times. Our study thus suggests significant variability in subsurface stratigraphy of the Kosi and the Gandak megafans even though they are located in similar geographic region. Such differences are attributed to the geomorphic diversity of the mountain exits of these megafans and their sediment transport history. Abstract Copyright (2014) Elsevier, B.V. JF - Sedimentary Geology AU - Sinha, Rajiv AU - Ahmad, Jawed AU - Gaurav, Kumar AU - Morin, Guillaume Y1 - 2014/03/15/ PY - 2014 DA - 2014 Mar 15 SP - 133 EP - 149 PB - Elsevier, Amsterdam VL - 301 SN - 0037-0738, 0037-0738 KW - geophysical surveys KW - well-logging KW - geotraverses KW - Gandak Fan KW - foreland basins KW - India KW - ground water KW - Cenozoic KW - transport KW - Indian Peninsula KW - sediments KW - basins KW - Himalayas KW - Asia KW - sequence stratigraphy KW - Kosi River KW - Quaternary KW - three-dimensional models KW - sediment transport KW - clastic sediments KW - Bihar Plains KW - sedimentation KW - geophysical methods KW - electrical methods KW - megafans KW - resistivity KW - fluvial sedimentation KW - Kosi Fan KW - electrical sounding KW - boreholes KW - alluvial fans KW - fluvial features KW - surveys KW - Gandak River KW - geomorphology KW - Ganges River basin KW - Bihar India KW - facies KW - 24:Quaternary geology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529797284?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Sedimentary+Geology&rft.atitle=Shallow+subsurface+stratigraphy+and+alluvial+architecture+of+the+Kosi+and+Gandak+Megafans+in+the+Himalayan+foreland+basin%2C+India&rft.au=Sinha%2C+Rajiv%3BAhmad%2C+Jawed%3BGaurav%2C+Kumar%3BMorin%2C+Guillaume&rft.aulast=Sinha&rft.aufirst=Rajiv&rft.date=2014-03-15&rft.volume=301&rft.issue=&rft.spage=133&rft.isbn=&rft.btitle=&rft.title=Sedimentary+Geology&rft.issn=00370738&rft_id=info:doi/10.1016%2Fj.sedgeo.2013.06.008 L2 - http://www.sciencedirect.com/science/journal/00370738 LA - English DB - GeoRef N1 - Conference title - AGU fall meeting 2012 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. sects., geol. sketch maps N1 - Last updated - 2014-05-29 N1 - CODEN - SEGEBX N1 - SubjectsTermNotLitGenreText - alluvial fans; Asia; basins; Bihar India; Bihar Plains; boreholes; Cenozoic; clastic sediments; electrical methods; electrical sounding; facies; fluvial features; fluvial sedimentation; foreland basins; Gandak Fan; Gandak River; Ganges River basin; geomorphology; geophysical methods; geophysical surveys; geotraverses; ground water; Himalayas; India; Indian Peninsula; Kosi Fan; Kosi River; megafans; Quaternary; resistivity; sediment transport; sedimentation; sediments; sequence stratigraphy; surveys; three-dimensional models; transport; well-logging DO - http://dx.doi.org/10.1016/j.sedgeo.2013.06.008 ER - TY - JOUR T1 - Channel arrangements and depositional styles in the Sao Lourenco fluvial megafan, Brazilian Pantanal Wetland AN - 1529794414; 2014-036892 AB - The Brazilian Pantanal is an extensive lowland tropical basin characterized by the presence of fluvial megafans and seasonally-inundated savanna floodplain wetlands. With an area of about 16,000 km (super 2) , the Sao Lourenco is the second largest megafan in the Pantanal. Three distinct fluvial channel styles that formed at different times during the late Quaternary are found here. A geomorphological and sedimentary assessment of these depositional patterns provides valuable insight on the environmental context of their evolution. New optically stimulated luminescence data indicate that the upper five meters of sediment in the Sao Lourenco megafan has been accumulating since the late Pleistocene. Ancient fan lobes, located in upper and intermediate fan settings, consist of medium- and coarse-grained fluvial sands and exhibit well-preserved distributary braided paleochannels on their surfaces. As the megafan evolved through time, Pleistocene lobes were incised by a prominent valley filled with Holocene-aged meander belt deposits, which consist of silts interbedded with very fine sands and clays. Currently, the incised valley is a zone of sediment bypass. Modern deposition occurs along the distal toe of the megafan system, where lobes characterized by distributary channel-levee ridges are widespread. These features formed by progradation of avulsion belts into a broad swampy floodbasin, which caused the lower portion of the meander belt to be abandoned. The significant differences observed in intra-fan morphology appear to be linked to the variability in effective precipitation. Fan lobes deposited with braided distributary channels occurred under relatively dry conditions in the late Pleistocene. By contrast, aggradational meander belt deposits and lobes with distributary channel-levee ridges formed during fluctuating precipitation conditions of the Holocene, when the Pantanal emerged from deglacial aridity. Modern lobes form under heavy seasonal flooding and deposition occurs in response to very rapid and common avulsion events. These results have implications for interpreting the complexity of megafan facies in similar continental basins. Abstract Copyright (2014) Elsevier, B.V. JF - Sedimentary Geology AU - Assine, Mario Luis AU - Corradini, Fabricio Anibal AU - Pupim, Fabiano do Nascimento AU - McGlue, Michael Matthew Y1 - 2014/03/15/ PY - 2014 DA - 2014 Mar 15 SP - 172 EP - 184 PB - Elsevier, Amsterdam VL - 301 SN - 0037-0738, 0037-0738 KW - avulsion KW - thematic mapper KW - imagery KW - floodplains KW - Paraguay Fan KW - Holocene KW - climate change KW - upper Pleistocene KW - Cenozoic KW - fan lobes KW - depositional environment KW - multispectral scanner KW - Sao Lourenco Fan KW - Pantanal Wetland KW - meanders KW - Quaternary KW - drainage patterns KW - channels KW - satellite methods KW - Mato Grosso Brazil KW - South America KW - Landsat KW - wetlands KW - deposition KW - Brazil KW - alluvial fans KW - upper Quaternary KW - fluvial features KW - Pleistocene KW - geomorphology KW - incised valleys KW - = KW - Cuiaba Fan KW - remote sensing KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529794414?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Sedimentary+Geology&rft.atitle=Channel+arrangements+and+depositional+styles+in+the+Sao+Lourenco+fluvial+megafan%2C+Brazilian+Pantanal+Wetland&rft.au=Assine%2C+Mario+Luis%3BCorradini%2C+Fabricio+Anibal%3BPupim%2C+Fabiano+do+Nascimento%3BMcGlue%2C+Michael+Matthew&rft.aulast=Assine&rft.aufirst=Mario&rft.date=2014-03-15&rft.volume=301&rft.issue=&rft.spage=172&rft.isbn=&rft.btitle=&rft.title=Sedimentary+Geology&rft.issn=00370738&rft_id=info:doi/10.1016%2Fj.sedgeo.2013.11.007 L2 - http://www.sciencedirect.com/science/journal/00370738 LA - English DB - GeoRef N1 - Conference title - AGU fall meeting 2012 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. incl. 1 table, geol. sketch maps N1 - Last updated - 2014-08-14 N1 - CODEN - SEGEBX N1 - SubjectsTermNotLitGenreText - alluvial fans; avulsion; Brazil; Cenozoic; channels; climate change; Cuiaba Fan; deposition; depositional environment; drainage patterns; fan lobes; floodplains; fluvial features; geomorphology; Holocene; imagery; incised valleys; Landsat; Mato Grosso Brazil; meanders; multispectral scanner; Pantanal Wetland; Paraguay Fan; Pleistocene; Quaternary; remote sensing; Sao Lourenco Fan; =; satellite methods; South America; thematic mapper; upper Pleistocene; upper Quaternary; wetlands DO - http://dx.doi.org/10.1016/j.sedgeo.2013.11.007 ER - TY - JOUR T1 - One-dimensional numerical modeling of the long-term morphodynamic evolution of a tidally-dominated estuary; the Lower Fly River (Papua New Guinea) AN - 1529794238; 2014-036888 AB - We use a one-dimensional morphodynamic model to analyze the long-term evolution of the lower reaches of the Fly River, Papua New Guinea, from the Everill Junction to the delta mouth. The model shows how the break in the exponential trend of river width triggers deposition, thus producing a tidal region characterized by a higher bed elevation with respect to the river-dominated one. Numerical simulations indicate that the river attains a dynamic equilibrium configuration in which the amount of sediment entering upstream is flushed seaward. A sensitivity analysis is performed, in which the effect of varying solid discharge, tidal harmonics, and initial conditions is discussed. The model shows that an equilibrium configuration results from a delicate balance between the aggrading effect associated with channel divergence (acting mainly during neap tide and at slack water) and the opposite effect of tidal flushing driven by residual water discharge. A physically meaningful morphodynamic equilibrium occurs only for a small range of values of sediment discharge prescribed at the upstream boundary. In particular, an increase in sediment discharge leads to aggradation, while a decrease triggers extensive scour and a deepening of the estuary. Abstract Copyright (2014) Elsevier, B.V. JF - Sedimentary Geology AU - Canestrelli, Alberto AU - Lanzoni, Stefano AU - Fagherazzi, Sergio Y1 - 2014/03/15/ PY - 2014 DA - 2014 Mar 15 SP - 107 EP - 119 PB - Elsevier, Amsterdam VL - 301 SN - 0037-0738, 0037-0738 KW - bedload KW - Fly River KW - numerical models KW - Australasia KW - sediment transport KW - erosion KW - Price-C scheme KW - one-dimensional models KW - landform evolution KW - elevation KW - sedimentation KW - equations KW - fluvial sedimentation KW - depth KW - estuaries KW - intertidal environment KW - transport KW - Papua New Guinea KW - hydrodynamics KW - coastal environment KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529794238?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Sedimentary+Geology&rft.atitle=One-dimensional+numerical+modeling+of+the+long-term+morphodynamic+evolution+of+a+tidally-dominated+estuary%3B+the+Lower+Fly+River+%28Papua+New+Guinea%29&rft.au=Canestrelli%2C+Alberto%3BLanzoni%2C+Stefano%3BFagherazzi%2C+Sergio&rft.aulast=Canestrelli&rft.aufirst=Alberto&rft.date=2014-03-15&rft.volume=301&rft.issue=&rft.spage=107&rft.isbn=&rft.btitle=&rft.title=Sedimentary+Geology&rft.issn=00370738&rft_id=info:doi/10.1016%2Fj.sedgeo.2013.06.009 L2 - http://www.sciencedirect.com/science/journal/00370738 LA - English DB - GeoRef N1 - Conference title - AGU fall meeting 2012 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 - 63 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2014-05-29 N1 - CODEN - SEGEBX N1 - SubjectsTermNotLitGenreText - Australasia; bedload; coastal environment; depth; elevation; equations; erosion; estuaries; fluvial sedimentation; Fly River; hydrodynamics; intertidal environment; landform evolution; numerical models; one-dimensional models; Papua New Guinea; Price-C scheme; sediment transport; sedimentation; transport DO - http://dx.doi.org/10.1016/j.sedgeo.2013.06.009 ER - TY - JOUR T1 - Mediative adjustment of river dynamics; the role of chute channels in tropical sand-bed meandering rivers AN - 1529794101; 2014-036887 AB - This paper examines processes of chute channel formation in four tropical sand-bed meandering rivers; the Strickland and Ok Tedi in Papua New Guinea, the Beni in Bolivia, and the lower Paraguay on the Paraguay/Argentina border. Empirical planform analyses highlight an association between meander bend widening and chute initiation that is consistent with recent physics-based modelling work. GIS analyses indicate that bend widening may be driven by a variety of mechanisms, including scour and cutbank bench formation at sharply-curving bends, point bar erosion due to cutbank impingement against cohesive terrace material, rapid cutbank erosion at rapidly extending bends, and spontaneous mid-channel bar formation. Chute channel initiation is observed to be predominantly associated with two of these widening mechanisms; i) an imbalance between cutbank erosion and point bar deposition associated with rapid bend extension, and ii) bank erosion forced by spontaneous mid-channel bar development. The work extends previous empirical analyses, which highlighted the role of bend extension (elongation) in driving chute initiation, with the observation that the frequency of chute initiation increases once bend extension rates and/or widening ratios exceed a reach-scale threshold. A temporal pattern of increased chute initiation frequency on the Ok Tedi, in response to channel steepening and mid-channel bar development following the addition of mine tailings, mirrors the inter- and intra-reach spatial patterns of chute initiation frequency on the Paraguay, Strickland and Beni Rivers, where increased stream power and sediment load are associated with increased bend extension and chute initiation rates. The process of chute formation is shown to be rate-dependent, and the threshold values of bend extension and widening ratio for chute initiation are shown to scale with measures of river energy, reminiscent of slope-ratio thresholds in river avulsion. Furthermore, Delft3D simulations suggest that chute formation can exert negative feedback on shear stress and bank erosion in the adjacent mainstem bifurcate, such that the process of chute formation may also be rate-limiting. Chute formation is activated iteratively in space and time in response to changes in river energy (and sediment load), predominantly affecting sites of rapid channel elongation, and thereby mediating the river response. Abstract Copyright (2014) Elsevier, B.V. JF - Sedimentary Geology AU - Grenfell, M C AU - Nicholas, A P AU - Aalto, R Y1 - 2014/03/15/ PY - 2014 DA - 2014 Mar 15 SP - 93 EP - 106 PB - Elsevier, Amsterdam VL - 301 SN - 0037-0738, 0037-0738 KW - tropical environment KW - chute channels KW - mining KW - Ok Tedi River KW - Paraguay KW - erosion KW - ArcGIS KW - rivers and streams KW - mechanism KW - Holocene KW - Bolivia KW - modern KW - Cenozoic KW - spatial variations KW - platform analysis KW - geographic information systems KW - quantitative analysis KW - Papua New Guinea KW - Beni River KW - hydrology KW - bedload KW - Paraguay River KW - meanders KW - Quaternary KW - Australasia KW - statistical analysis KW - sedimentation KW - drainage patterns KW - bends KW - water erosion KW - Strickland River KW - ArcInfo KW - fluvial sedimentation KW - South America KW - sand-bed streams KW - Argentina KW - channel geometry KW - fluvial features KW - streams KW - information systems KW - upper Holocene KW - braided streams KW - regression analysis KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529794101?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Sedimentary+Geology&rft.atitle=Mediative+adjustment+of+river+dynamics%3B+the+role+of+chute+channels+in+tropical+sand-bed+meandering+rivers&rft.au=Grenfell%2C+M+C%3BNicholas%2C+A+P%3BAalto%2C+R&rft.aulast=Grenfell&rft.aufirst=M&rft.date=2014-03-15&rft.volume=301&rft.issue=&rft.spage=93&rft.isbn=&rft.btitle=&rft.title=Sedimentary+Geology&rft.issn=00370738&rft_id=info:doi/10.1016%2Fj.sedgeo.2013.06.007 L2 - http://www.sciencedirect.com/science/journal/00370738 LA - English DB - GeoRef N1 - Conference title - AGU fall meeting 2012 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 - 75 N1 - Document feature - illus. N1 - Last updated - 2014-08-14 N1 - CODEN - SEGEBX N1 - SubjectsTermNotLitGenreText - ArcGIS; ArcInfo; Argentina; Australasia; bedload; bends; Beni River; Bolivia; braided streams; Cenozoic; channel geometry; chute channels; drainage patterns; erosion; fluvial features; fluvial sedimentation; geographic information systems; Holocene; hydrology; information systems; meanders; mechanism; mining; modern; Ok Tedi River; Papua New Guinea; Paraguay; Paraguay River; platform analysis; quantitative analysis; Quaternary; regression analysis; rivers and streams; sand-bed streams; sedimentation; South America; spatial variations; statistical analysis; streams; Strickland River; tropical environment; upper Holocene; water erosion DO - http://dx.doi.org/10.1016/j.sedgeo.2013.06.007 ER - TY - JOUR T1 - Influence of growth faults on coastal fluvial systems; examples from the late Miocene to Recent Mississippi River delta AN - 1529794091; 2014-036889 AB - The details of how fluvial systems respond to spatial changes in land-surface subsidence produced by active faulting remain incompletely understood. Here, we examine the degree to which the positioning of individual channels and channel-belts is affected by local maxima in subsidence associated with the hanging walls of growth faults. The channel forms and faults are imaged using a seismic volume covering 1400 km (super 2) of Breton Sound and Barataria Bay in southern Louisiana, USA. We look at the consequences of interactions between channels, channel-belts, and faults in late Miocene to Recent strata. More than fifty individual channels that crossed the traces of active growth faults were examined. Of these channels, only three appear to have been redirected by the faults. There also appeared to be no systematic change in the cross-sectional geometries of channels or channel-belts associated with crossing a fault, though the orientation of the channel-belts appears to be more influenced by faulting than the orientation of individual channels. Seven out of ten mapped channel-belts appear to have been steered by growth faults. We propose that channel belts are more likely to be influenced by faults than individual channels because channel-belts are longer lived features, unlikely to shift their overall position before experiencing a discrete faulting event. In addition, the style of influence in the few cases where an individual channel is affected by a fault is different from that of larger systems. While downstream of a fault channel-belts generally become oriented perpendicular to fault strike, the individual channels are directed along the hanging wall of the fault, running parallel to the fault trace. We relate this to the ratio of the length-scale of fault rollover relative to the channel or channel-belt width. Fluvial-fault interactions with higher values for this ratio are more likely to be carried parallel to the fault trace than systems with lower ratio values. Abstract Copyright (2014) Elsevier, B.V. JF - Sedimentary Geology AU - Armstrong, Christopher AU - Mohrig, David AU - Hess, Thomas AU - George, Terra AU - Straub, Kyle M Y1 - 2014/03/15/ PY - 2014 DA - 2014 Mar 15 SP - 120 EP - 132 PB - Elsevier, Amsterdam VL - 301 SN - 0037-0738, 0037-0738 KW - United States KW - imagery KW - fluvial stratigraphy KW - geophysical surveys KW - upper Pliocene KW - subsidence KW - Lafourche Parish Louisiana KW - Holocene KW - Jefferson Parish Louisiana KW - Cenozoic KW - neotectonics KW - Quarantine Bay KW - tectonics KW - Louisiana KW - active faults KW - faults KW - North America KW - Quaternary KW - three-dimensional models KW - deltaic sedimentation KW - sedimentation KW - Mississippi Delta KW - geophysical methods KW - structural controls KW - channels KW - growth faults KW - Gulf Coastal Plain KW - Barataria Bay KW - fluvial sedimentation KW - Breton Sound KW - Miocene KW - seismic methods KW - case studies KW - Black Bay KW - Tertiary KW - southern Louisiana KW - Plaquemines Parish Louisiana KW - Neogene KW - volume KW - surveys KW - Pliocene KW - upper Miocene KW - deltaic environment KW - Grand Lake KW - 23:Geomorphology KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529794091?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Sedimentary+Geology&rft.atitle=Influence+of+growth+faults+on+coastal+fluvial+systems%3B+examples+from+the+late+Miocene+to+Recent+Mississippi+River+delta&rft.au=Armstrong%2C+Christopher%3BMohrig%2C+David%3BHess%2C+Thomas%3BGeorge%2C+Terra%3BStraub%2C+Kyle+M&rft.aulast=Armstrong&rft.aufirst=Christopher&rft.date=2014-03-15&rft.volume=301&rft.issue=&rft.spage=120&rft.isbn=&rft.btitle=&rft.title=Sedimentary+Geology&rft.issn=00370738&rft_id=info:doi/10.1016%2Fj.sedgeo.2013.06.010 L2 - http://www.sciencedirect.com/science/journal/00370738 LA - English DB - GeoRef N1 - Conference title - AGU fall meeting 2012 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 - 20 N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2014-05-29 N1 - CODEN - SEGEBX N1 - SubjectsTermNotLitGenreText - active faults; Barataria Bay; Black Bay; Breton Sound; case studies; Cenozoic; channels; deltaic environment; deltaic sedimentation; faults; fluvial sedimentation; fluvial stratigraphy; geophysical methods; geophysical surveys; Grand Lake; growth faults; Gulf Coastal Plain; Holocene; imagery; Jefferson Parish Louisiana; Lafourche Parish Louisiana; Louisiana; Miocene; Mississippi Delta; Neogene; neotectonics; North America; Plaquemines Parish Louisiana; Pliocene; Quarantine Bay; Quaternary; sedimentation; seismic methods; southern Louisiana; structural controls; subsidence; surveys; tectonics; Tertiary; three-dimensional models; United States; upper Miocene; upper Pliocene; volume DO - http://dx.doi.org/10.1016/j.sedgeo.2013.06.010 ER - TY - JOUR T1 - AGU fall meeting 2012 AN - 1529793989; 2014-036886 JF - Sedimentary Geology Y1 - 2014/03/15/ PY - 2014 DA - 2014 Mar 15 SP - 91 EP - 184 PB - Elsevier, Amsterdam VL - 301 SN - 0037-0738, 0037-0738 KW - hydrology KW - Quaternary KW - landform evolution KW - sedimentation KW - rivers and streams KW - megafans KW - channels KW - rivers KW - fluvial sedimentation KW - size KW - Cenozoic KW - case studies KW - Tertiary KW - alluvial fans KW - fluvial features KW - 24:Quaternary geology KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529793989?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&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=Sedimentary+Geology&rft.atitle=AGU+fall+meeting+2012&rft.au=&rft.aulast=&rft.aufirst=&rft.date=2014-03-15&rft.volume=301&rft.issue=&rft.spage=91&rft.isbn=&rft.btitle=&rft.title=Sedimentary+Geology&rft.issn=00370738&rft_id=info:doi/ L2 - http://www.sciencedirect.com/science/journal/00370738 LA - English DB - GeoRef N1 - Conference title - AGU fall meeting 2012 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 - Document feature - illus. N1 - SuppNotes - Individual papers are cited separately N1 - Last updated - 2014-05-29 N1 - CODEN - SEGEBX N1 - SubjectsTermNotLitGenreText - alluvial fans; case studies; Cenozoic; channels; fluvial features; fluvial sedimentation; hydrology; landform evolution; megafans; Quaternary; rivers; rivers and streams; sedimentation; size; Tertiary ER - TY - NEWS T1 - NASA Goes Down Under to Tap High-Altitude Ice AN - 1505370308 JF - UPI Space Daily AU - Kathy Barnstorff for Langley Research Center Y1 - 2014/03/10/ PY - 2014 DA - 2014 Mar 10 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1505370308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NASA+Goes+Down+Under+to+Tap+High-Altitude+Ice&rft.au=Kathy+Barnstorff+for+Langley+Research+Center&rft.aulast=Kathy+Barnstorff+for+Langley+Research+Center&rft.aufirst=&rft.date=2014-03-10&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-03-10 ER - TY - NEWS T1 - NASA Satellites See Arctic Surface Darkening Faster AN - 1505128249 JF - UPI Space Daily AU - Maria-Jose Vinas for NASA Earth News Y1 - 2014/03/10/ PY - 2014 DA - 2014 Mar 10 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1505128249?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NASA+Satellites+See+Arctic+Surface+Darkening+Faster&rft.au=Maria-Jose+Vinas+for+NASA+Earth+News&rft.aulast=Maria-Jose+Vinas+for+NASA+Earth+News&rft.aufirst=&rft.date=2014-03-10&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-03-10 ER - TY - CPAPER T1 - A Five-Year Performance Study of Low VOC Coatings over Zinc Thermal Spray for the Protection of Carbon Steel at the Kennedy Space Center T2 - 2014 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2014) AN - 1518616790; 6286511 JF - 2014 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2014) AU - Kolody, Mark AU - Curran, Jerry AU - Calle, Luz Y1 - 2014/03/09/ PY - 2014 DA - 2014 Mar 09 KW - Carbon KW - Sprays KW - Coating materials KW - Zinc KW - Steel KW - Volatile organic compounds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518616790?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2014%29&rft.atitle=A+Five-Year+Performance+Study+of+Low+VOC+Coatings+over+Zinc+Thermal+Spray+for+the+Protection+of+Carbon+Steel+at+the+Kennedy+Space+Center&rft.au=Kolody%2C+Mark%3BCurran%2C+Jerry%3BCalle%2C+Luz&rft.aulast=Kolody&rft.aufirst=Mark&rft.date=2014-03-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://events.nace.org/conferences/C2014/images_welcome/C2014FinalProgram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - NEWS T1 - LADEE Sends Its First Images of the Moon Back to Earth AN - 1503497452 JF - UPI Space Daily AU - Rachel Hoover for Ames Research Center Y1 - 2014/03/02/ PY - 2014 DA - 2014 Mar 02 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1503497452?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=LADEE+Sends+Its+First+Images+of+the+Moon+Back+to+Earth&rft.au=Rachel+Hoover+for+Ames+Research+Center&rft.aulast=Rachel+Hoover+for+Ames+Research+Center&rft.aufirst=&rft.date=2014-03-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-03-03 ER - TY - JOUR T1 - Influence of stellar multiplicity on planet formation; I, Evidence of suppressed planet formation due to stellar companions within 20 Au and validation of four planets from the Kepler multiple planet candidates AN - 1832661922; 691131-4 AB - The planet occurrence rate for multiple stars is important in two aspects. First, almost half of stellar systems in the solar neighborhood are multiple systems. Second, the comparison of the planet occurrence rate for multiple stars to that for single stars sheds light on the influence of stellar multiplicity on planet formation and evolution. We developed a method of distinguishing planet occurrence rates for single and multiple stars. From a sample of 138 bright (K (sub P) < 13.5) Kepler multi-planet candidate systems, we compared the stellar multiplicity rate of these planet host stars to that of field stars. Using dynamical stability analyses and archival Doppler measurements, we find that the stellar multiplicity rate of planet host stars is significantly lower than field stars for semimajor axes less than 20 AU, suggesting that planet formation and evolution are suppressed by the presence of a close-in companion star at these separations. The influence of stellar multiplicity at larger separations is uncertain because of search incompleteness due to a limited Doppler observation time baseline and a lack of high-resolution imaging observation. We calculated the planet confidence for the sample of multi-planet candidates and find that the planet confidences for KOI 82.01, KOI 115.01, KOI 282.01, and KOI 1781.02 are higher than 99.7% and thus validate the planetary nature of these four planet candidates. This sample of bright Kepler multi-planet candidates with refined stellar and orbital parameters, planet confidence estimation, and nearby stellar companion identification offers a well-characterized sample for future theoretical and observational study. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Wang, Ji AU - Xie, Ji-Wei AU - Barclay, Thomas AU - Fischer, Debra A Y1 - 2014/03/01/ PY - 2014 DA - 2014 Mar 01 EP - Paper no. 4 PB - IOP Publishing for American Astronomical Society, Bristol VL - 783 IS - 1 SN - 0004-637X, 0004-637X KW - extrasolar planets KW - iterative methods KW - Doppler effect KW - orbits KW - statistical analysis KW - stability KW - planets KW - stellar multiplicity KW - multi-planet systems KW - dynamics KW - stars KW - stellar systems KW - algorithms KW - Kepler Mission KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832661922?accountid=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=Influence+of+stellar+multiplicity+on+planet+formation%3B+I%2C+Evidence+of+suppressed+planet+formation+due+to+stellar+companions+within+20+Au+and+validation+of+four+planets+from+the+Kepler+multiple+planet+candidates&rft.au=Wang%2C+Ji%3BXie%2C+Ji-Wei%3BBarclay%2C+Thomas%3BFischer%2C+Debra+A&rft.aulast=Wang&rft.aufirst=Ji&rft.date=2014-03-01&rft.volume=783&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F783%2F1%2F4 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 - 88 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - algorithms; Doppler effect; dynamics; extrasolar planets; iterative methods; Kepler Mission; multi-planet systems; orbits; planets; stability; stars; statistical analysis; stellar multiplicity; stellar systems DO - http://dx.doi.org/10.1088/0004-637X/783/1/4 ER - TY - JOUR T1 - mBAND analysis of early and late damages in the chromosome of human lymphocytes after exposures to gamma rays and Fe ions AN - 1793230972; PQ0002617214 AB - Stable-type chromosome aberrations that survive multiple generations of cell division include translocation and inversions. An efficient method to detect an inversion is multi-color banding fluorescent in situ hybridization (mBAND) which allows identification of both inter- and intra-chromosome aberrations simultaneously. This study was aimed at investigating stable or late-arising chromosome aberrations in human lymphocytes induced after low- and high-LET radiation exposure. Human lymphocytes were exposed in vitro to gamma ray doses of 2 or 4 Gy using a 137Cs source at a dose rate of 0.5 Gy/min. Chromosomes were collected at 48 h which represented the first mitosis, and 7 and 14 days after irradiation using a premature chromosome condensation (PCC) technique as described previously. With gamma irradiation, about half of the damages observed at first mitosis remained after 7- and 14-day culture, suggesting transmissibility of damages to the surviving progeny. The break-point distribution for human lymphocytes after radiation exposure was different from the previously published distribution for human mammary epithelial cells, indicating that inter-phase chromatin folding structures play a role in the distribution of radiation-induced breaks. JF - Journal of Radiation Research AU - Yuasa-Sunagawa, Mayumi AU - Zhang, Ye AU - Yeshitla, Samrawit A AU - Kadhim, Munira A AU - Wilson, Bobby L AU - Wu, Honglu AD - NASA Johnson Space Center, 2101 NASA Parkway, Houston, TX 77058, USA Y1 - 2014/03// PY - 2014 DA - March 2014 SP - i87 EP - i88 PB - Japan Science and Technology Agency VL - 55 SN - 0449-3060, 0449-3060 KW - Solid State and Superconductivity Abstracts (SO); Environmental Engineering Abstracts (EN) KW - heavy ion KW - genomic instability KW - chromosome aberrations KW - mBAND KW - Damage KW - Aberration KW - Chromosomes KW - Gamma rays KW - Radiation effects KW - Human KW - Lymphocytes KW - Inversions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793230972?accountid=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+Radiation+Research&rft.atitle=mBAND+analysis+of+early+and+late+damages+in+the+chromosome+of+human+lymphocytes+after+exposures+to+gamma+rays+and+Fe+ions&rft.au=Yuasa-Sunagawa%2C+Mayumi%3BZhang%2C+Ye%3BYeshitla%2C+Samrawit+A%3BKadhim%2C+Munira+A%3BWilson%2C+Bobby+L%3BWu%2C+Honglu&rft.aulast=Yuasa-Sunagawa&rft.aufirst=Mayumi&rft.date=2014-03-01&rft.volume=55&rft.issue=&rft.spage=i87&rft.isbn=&rft.btitle=&rft.title=Journal+of+Radiation+Research&rft.issn=04493060&rft_id=info:doi/10.1093%2Fjrr%2Frrt182 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-06-01 N1 - Last updated - 2016-08-08 DO - http://dx.doi.org/10.1093/jrr/rrt182 ER - TY - JOUR T1 - Chromosomal aberrations in human lymphocytes and fibroblasts after exposure to very low doses of high-LET radiation AN - 1793226064; PQ0002617196 AB - The relationship between biological effects and low doses of radiation is still uncertain, especially for high-LET radiation exposures. In this study, we determined the dose-response for chromosome damage after exposure to very low doses of high-LET radiation and assessed the radiation qualities of Fe, Si and Oxygen ions. Chromosomal aberrations (CA) were measured in human peripheral blood lymphocytes and normal skin fibroblasts after exposure to very low doses of 77-MeV/u oxygen, 170-MeV/u [sup 28] Si, or [sup 56]Fe ions with energies of 600- or 450-MeV/u. The results show a non-linear dose-response for CA in fibroblasts after very low doses of high-LET exposure. Possible explanations for this could involve non-targeted effects due to aberrant cell signaling, perhaps involving nitric oxide and TGF- beta , or could be due to delta-ray dose fluctuations where CA are induced in cells that receive a significant dose from delta-rays emanating from the multiple ion tracks that do not directly traverse cell nuclei. JF - Journal of Radiation Research AU - Hada, Megumi AU - George, Kerry AU - Chappell, Lori AU - Cucinotta, Francis A AD - Universities Space Research Association, Houston, USA megumi.hada-1@nasa.gov Y1 - 2014/03// PY - 2014 DA - March 2014 SP - i50 EP - i51 PB - Japan Science and Technology Agency VL - 55 SN - 0449-3060, 0449-3060 KW - Solid State and Superconductivity Abstracts (SO); Environmental Engineering Abstracts (EN) KW - low dose KW - heavy ion KW - chromosome aberrations KW - Aberration KW - Silicon KW - Quality assessment KW - Human KW - Exposure KW - Lymphocytes KW - Fibroblasts KW - Energy measurement UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793226064?accountid=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+Radiation+Research&rft.atitle=Chromosomal+aberrations+in+human+lymphocytes+and+fibroblasts+after+exposure+to+very+low+doses+of+high-LET+radiation&rft.au=Hada%2C+Megumi%3BGeorge%2C+Kerry%3BChappell%2C+Lori%3BCucinotta%2C+Francis+A&rft.aulast=Hada&rft.aufirst=Megumi&rft.date=2014-03-01&rft.volume=55&rft.issue=&rft.spage=i50&rft.isbn=&rft.btitle=&rft.title=Journal+of+Radiation+Research&rft.issn=04493060&rft_id=info:doi/10.1093%2Fjrr%2Frrt212 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-06-01 N1 - Last updated - 2016-08-08 DO - http://dx.doi.org/10.1093/jrr/rrt212 ER - TY - JOUR T1 - Coulomb stress, surface displacement and seismic rate changes associated with ice mass fluctuations as seasonal, annual, and decadal time scales in south central Alaska AN - 1756506809; 2015-120497 JF - Seismological Research Letters AU - Sauber, Jeanne M AU - Ruppert, N A Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 447 EP - 448 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - North America KW - Yakutat Terrane KW - Cordova Quadrangle KW - stress KW - seismicity KW - ice KW - south-central Alaska KW - Alaska KW - seasonal variations KW - faults KW - crust KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506809?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Coulomb+stress%2C+surface+displacement+and+seismic+rate+changes+associated+with+ice+mass+fluctuations+as+seasonal%2C+annual%2C+and+decadal+time+scales+in+south+central+Alaska&rft.au=Sauber%2C+Jeanne+M%3BRuppert%2C+N+A&rft.aulast=Sauber&rft.aufirst=Jeanne&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=447&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Alaska; Cordova Quadrangle; crust; faults; ice; North America; seasonal variations; seismicity; south-central Alaska; stress; United States; Yakutat Terrane ER - TY - JOUR T1 - Atomic hydrogen in the mesopause region derived from SABER: Algorithm theoretical basis, measurement uncertainty, and results AN - 1642311580; 19719091 AB - Atomic hydrogen (H) is a fundamental component in the photochemistry and energy balance of the terrestrial mesopause region (80-100 km). H is generated primarily by photolysis of water vapor and participates in a highly exothermic reaction with ozone. This reaction is a significant source of heat in the mesopause region and also creates highly vibrationally excited hydroxyl (OH) from which the Meinel band radiative emission features originate. Concentrations (cm super(-3)) and volume mixing ratios of H are derived from observations of infrared emission from the OH ( upsilon =9+8, Delta upsilon =2) vibration-rotation bands near 2.0 mu m made by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument on the NASA Thermosphere Ionosphere Mesosphere Energetics and Dynamics satellite. The algorithms for deriving day and night H are described herein. Day and night concentrations exhibit excellent agreement between 87 and 95 km. SABER H results also exhibit good agreement with observations from the Solar Mesosphere Explorer made nearly 30 years ago. An apparent inverse dependence on the solar cycle is observed in the SABER H concentrations, with the H increasing as solar activity decreases. This increase is shown to be primarily due to the temperature dependence of various reaction rate coefficients for H photochemistry. The SABER H data, coupled with SABER atomic oxygen, ozone, and temperature, enable tests of mesospheric photochemistry and energetics in atmospheric models, studies of formation of polar mesospheric clouds, and studies of atmospheric evolution via escape of hydrogen. These data and studies are made possible by the wide range of parameters measured simultaneously by the SABER instrument. Key Points * Long-term mesopause region atomic hydrogen data set spanning a solar cycle * Atomic hydrogen exhibits inverse relationship with solar cycle * Solar cycle dependence due to inverse temperature dependence of chemistry JF - Journal of Geophysical Research: Atmospheres AU - Mlynczak, Martin G AU - Hunt, Linda A AU - Marshall, BThomas AU - Mertens, Christopher J AU - Marsh, Daniel R AU - Smith, Anne K AU - Russell, James M AU - Siskind, David E AU - Gordley, Larry L AD - NASA Langley Research Center, Hampton, Virginia, USA. Y1 - 2014/03// PY - 2014 DA - Mar 2014 SP - 3516 EP - 3526 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 6 SN - 2169-897X, 2169-897X KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Atomic hydrogen KW - mesopause region KW - photochemistry KW - energy balance KW - odd-hydrogen KW - Photochemistry KW - Mesopause KW - Mathematical models KW - Polar mesospheric clouds KW - Inverse KW - Atmospheres KW - Emission KW - Solar cycles UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642311580?accountid=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=Atomic+hydrogen+in+the+mesopause+region+derived+from+SABER%3A+Algorithm+theoretical+basis%2C+measurement+uncertainty%2C+and+results&rft.au=Mlynczak%2C+Martin+G%3BHunt%2C+Linda+A%3BMarshall%2C+BThomas%3BMertens%2C+Christopher+J%3BMarsh%2C+Daniel+R%3BSmith%2C+Anne+K%3BRussell%2C+James+M%3BSiskind%2C+David+E%3BGordley%2C+Larry+L&rft.aulast=Mlynczak&rft.aufirst=Martin&rft.date=2014-03-01&rft.volume=119&rft.issue=6&rft.spage=3516&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD021263 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-07-01 N1 - Last updated - 2015-04-09 DO - http://dx.doi.org/10.1002/2013JD021263 ER - TY - JOUR T1 - Tracking elevated pollution layers with a newly developed hyperspectral Sun/Sky spectrometer (4STAR): Results from the TCAP 2012 and 2013 campaigns AN - 1642306042; 19634386 AB - Total columnar water vapor (CWV), nitrogen dioxide (NO sub(2)), and ozone (O sub(3)) are derived from a newly developed, hyperspectral airborne Sun-sky spectrometer (4STAR) for the first time during the two intensive phases of the Two-Column Aerosol Project (TCAP) in summer 2012 and winter 2013 aboard the DOE G-1 aircraft. We compare results with coincident measurements. We find 0.045g/cm super(2) (4.2%) negative bias and 0.28g/cm super(2) (26.3%) root-mean-square difference (RMSD) in water vapor layer comparison with an in situ hygrometer and an overall RMSD of 1.28g/m super(3) (38%) water vapor amount in profile by profile comparisons, with differences distributed evenly around zero. RMSD for O sub(3) columns average to 3%, with a 1% negative bias for 4STAR compared with the Ozone Measuring Instrument along aircraft flight tracks for 14 flights during both TCAP phases. Ground-based comparisons with Pandora spectrometers at the Goddard Space Flight Center, Greenbelt, Maryland, showed excellent agreement between the instruments for both O sub(3) (1% RMSD and 0.1% bias) and NO sub(2) (17.5% RMSD and -8% bias). We apply clustering analysis of the retrieved products as a case study during the TCAP summer campaign to identify variations in atmospheric composition of elevated pollution layers and demonstrate that combined total column measurements of trace gas and aerosols can be used to define different pollution layer sources, by comparing our results with trajectory analysis and in situ airborne miniSPLAT (single-particle mass spectrometer) measurements. Our analysis represents a first step in linking sparse but intense in situ measurements from suborbital campaigns with total column observations from space. JF - Journal of Geophysical Research: Atmospheres AU - Segal-Rosenheimer, M AU - Russell, P B AU - Schmid, B AU - Redemann, J AU - Livingston, J M AU - Flynn, C J AU - Johnson, R R AU - Dunagan, SE AU - Shinozuka, Y AU - Herman, J AU - Cede, A AU - Abuhassan, N AU - Comstock, J M AU - Hubbe, J M AU - Zelenyuk, A AU - Wilson, J AD - NASA Ames Research Center, Moffett Field, California, USA. Y1 - 2014/03// PY - 2014 DA - Mar 2014 SP - 2611 EP - 2628 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 5 SN - 2169-897X, 2169-897X KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - air-pollution KW - Biomass-burning KW - sunphotometery KW - hyperspectral KW - trace-gases KW - Nitrogen dioxide KW - Aerosols KW - Water vapor KW - Pollution abatement KW - Bias KW - Water pollution KW - Spectrometers KW - Elevated UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642306042?accountid=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=Tracking+elevated+pollution+layers+with+a+newly+developed+hyperspectral+Sun%2FSky+spectrometer+%284STAR%29%3A+Results+from+the+TCAP+2012+and+2013+campaigns&rft.au=Segal-Rosenheimer%2C+M%3BRussell%2C+P+B%3BSchmid%2C+B%3BRedemann%2C+J%3BLivingston%2C+J+M%3BFlynn%2C+C+J%3BJohnson%2C+R+R%3BDunagan%2C+SE%3BShinozuka%2C+Y%3BHerman%2C+J%3BCede%2C+A%3BAbuhassan%2C+N%3BComstock%2C+J+M%3BHubbe%2C+J+M%3BZelenyuk%2C+A%3BWilson%2C+J&rft.aulast=Segal-Rosenheimer&rft.aufirst=M&rft.date=2014-03-01&rft.volume=119&rft.issue=5&rft.spage=2611&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD020884 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Last updated - 2015-03-03 DO - http://dx.doi.org/10.1002/2013JD020884 ER - TY - JOUR T1 - Measurements of the neutron spectrum on the Martian surface with MSL/RAD AN - 1618132829; 2014-084343 AB - The Radiation Assessment Detector (RAD), onboard the Mars Science Laboratory (MSL) rover Curiosity, measures the energetic charged and neutral particles and the radiation dose rate on the surface of Mars. An important factor for determining the biological impact of the Martian surface radiation is the specific contribution of neutrons, with their deeper penetration depth and ensuing high biological effectiveness. This is very difficult to measure quantitatively, resulting in considerable uncertainties in the total radiation dose. In contrast to charged particles, neutral particles (neutrons and gamma rays) are generally only measured indirectly. Measured spectra are a complex convolution of the incident particle spectrum with the detector response function and must be unfolded. We apply an inversion method (based on a maximum likelihood estimation) to calculate the neutron and gamma spectra from the RAD neutral particle measurements. Here we show the first spectra on the surface of Mars and compare them to theoretical predictions. The measured neutron spectrum (ranging from 8 to 740 MeV) translates into a radiation dose rate of 14+ or -4mu Gy/d and a dose equivalent rate of 61+ or -15mu Sv/d. This corresponds to 7% of the measured total surface dose rate and 10% of the biologically relevant surface dose equivalent rate on Mars. Measuring the Martian neutron and gamma spectra is an essential step for determining the mutagenic influences to past or present life at or beneath the Martian surface as well as the radiation hazard for future human exploration, including the shielding design of a potential habitat. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Koehler, J AU - Zeitlin, C AU - Ehresmann, Bent AU - Wimmer-Schweingruber, Robert F AU - Hassler, Donald M AU - Reitz, G AU - Brinza, David E AU - Weigle, G AU - Appel, J AU - Boettcher, Stephan AU - Boehm, Eckart AU - Burmeister, Soenke AU - Guo, J AU - Martin, Cesar AU - Posner, A AU - Rafkin, Scot C R AU - Kortmann, O Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 594 EP - 603 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 3 SN - 2169-9097, 2169-9097 KW - dosimetry KW - power law KW - Mars KW - calibration KW - measurement KW - terrestrial planets KW - Radiation Assessment Detector KW - planets KW - neutrons KW - neutron probe data KW - gamma rays KW - background radiation KW - Curiosity Rover KW - natural hazards KW - Mars Science Laboratory KW - gamma-ray spectra KW - spectra KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618132829?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Measurements+of+the+neutron+spectrum+on+the+Martian+surface+with+MSL%2FRAD&rft.au=Koehler%2C+J%3BZeitlin%2C+C%3BEhresmann%2C+Bent%3BWimmer-Schweingruber%2C+Robert+F%3BHassler%2C+Donald+M%3BReitz%2C+G%3BBrinza%2C+David+E%3BWeigle%2C+G%3BAppel%2C+J%3BBoettcher%2C+Stephan%3BBoehm%2C+Eckart%3BBurmeister%2C+Soenke%3BGuo%2C+J%3BMartin%2C+Cesar%3BPosner%2C+A%3BRafkin%2C+Scot+C+R%3BKortmann%2C+O&rft.aulast=Koehler&rft.aufirst=J&rft.date=2014-03-01&rft.volume=119&rft.issue=3&rft.spage=594&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004539 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 - 23 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - background radiation; calibration; Curiosity Rover; dosimetry; gamma rays; gamma-ray spectra; Mars; Mars Science Laboratory; measurement; natural hazards; neutron probe data; neutrons; planets; power law; Radiation Assessment Detector; spectra; terrestrial planets DO - http://dx.doi.org/10.1002/2013JE004539 ER - TY - JOUR T1 - Preliminary interpretation of the REMS pressure data from the first 100 sols of the MSL mission AN - 1618132818; 2014-084334 AB - We provide a preliminary interpretation of the Rover Environmental Monitoring Station (REMS) pressure data from the first 100 Martian solar days (sols) of the Mars Science Laboratory mission. The pressure sensor is performing well and has revealed the existence of phenomena undetected by previous missions that include possible gravity waves excited by evening downslope flows, relatively dust-free convective vortices analogous in structure to dust devils, and signatures indicative of the circulation induced by Gale Crater and its central mound. Other more familiar phenomena are also present including the thermal tides, generated by daily insolation variations, and the CO (sub 2) cycle, driven by the condensation and sublimation of CO (sub 2) in the polar regions. The amplitude of the thermal tides is several times larger than those seen by other landers primarily because Curiosity is located where eastward and westward tidal modes constructively interfere and also because the crater circulation amplifies the tides to some extent. During the first 100 sols tidal amplitudes generally decline, which we attribute to the waning influence of the Kelvin wave. Toward the end of the 100 sol period, tidal amplitudes abruptly increased in response to a nearby regional dust storm that did not expand to global scales. Tidal phases changed abruptly during the onset of this storm suggesting a change in the interaction between eastward and westward modes. When compared to Viking Lander 2 data, the REMS daily average pressures show no evidence yet for the 1-20 Pa increase expected from the possible loss of CO (sub 2) from the south polar residual cap. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Haberle, Robert M AU - Gomez-Elvira, J AU - Torre Juarez, M AU - Harri, A M AU - Hollingsworth, J L AU - Kahanpaa, H AU - Kahre, M A AU - Lemmon, M T AU - Martin-Torres, F J AU - Mischna, M AU - Moores, J E AU - Newman, C AU - Rafkin, S C R AU - Renno, N AU - Richardson, M I AU - Rodriguez-Manfredi, J A AU - Vasavada, A R AU - Zorzano-Mier, M P Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 440 EP - 453 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 3 SN - 2169-9097, 2169-9097 KW - impact features KW - Mars KW - simulation KW - dust devils KW - polar caps KW - Gale Crater KW - carbon dioxide KW - sublimation KW - atmospheric circulation KW - oscillations KW - Curiosity Rover KW - diurnal variations KW - dust storms KW - general circulation models KW - pressure KW - condensation KW - cyclic processes KW - vorticity KW - convection KW - REMS pressure sensor KW - tides KW - terrestrial planets KW - planets KW - Rover Environmental Monitoring Station KW - gravity waves KW - Mars Science Laboratory KW - insolation KW - impact craters KW - seasonal variations KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618132818?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Preliminary+interpretation+of+the+REMS+pressure+data+from+the+first+100+sols+of+the+MSL+mission&rft.au=Haberle%2C+Robert+M%3BGomez-Elvira%2C+J%3BTorre+Juarez%2C+M%3BHarri%2C+A+M%3BHollingsworth%2C+J+L%3BKahanpaa%2C+H%3BKahre%2C+M+A%3BLemmon%2C+M+T%3BMartin-Torres%2C+F+J%3BMischna%2C+M%3BMoores%2C+J+E%3BNewman%2C+C%3BRafkin%2C+S+C+R%3BRenno%2C+N%3BRichardson%2C+M+I%3BRodriguez-Manfredi%2C+J+A%3BVasavada%2C+A+R%3BZorzano-Mier%2C+M+P&rft.aulast=Haberle&rft.aufirst=Robert&rft.date=2014-03-01&rft.volume=119&rft.issue=3&rft.spage=440&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004488 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 - 34 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - atmospheric circulation; carbon dioxide; condensation; convection; Curiosity Rover; cyclic processes; diurnal variations; dust devils; dust storms; Gale Crater; general circulation models; gravity waves; impact craters; impact features; insolation; instruments; Mars; Mars Science Laboratory; oscillations; planets; polar caps; pressure; REMS pressure sensor; Rover Environmental Monitoring Station; seasonal variations; simulation; sublimation; terrestrial planets; tides; vorticity DO - http://dx.doi.org/10.1002/2013JE004488 ER - TY - JOUR T1 - How well do we know the polar hydrogen distribution on the Moon? AN - 1618132498; 2014-084342 AB - A detailed comparison is made of results from the Lunar Prospector Neutron Spectrometer (LPNS) and the Lunar Exploration Neutron Detector Collimated Sensors for Epithermal Neutrons (LEND CSETN). Using the autocorrelation function and power spectrum of the polar count rate maps produced by these experiments, it is shown that the LEND CSETN has a footprint that is at least as big as would be expected for an omnidirectional detector at an orbital altitude of 50 km. The collimated flux into the field of view of the collimator is negligible. A dip in the count rate in Shoemaker crater is found to be consistent with being a statistical fluctuation superimposed on a significant, larger-scale decrease in the count rate, providing no evidence for high spatial resolution of the LEND CSETN. The maps of lunar polar hydrogen with the highest contrast, i.e., spatial resolution, are those resulting from pixon image reconstructions of the LPNS data. These typically provide weight percentages of water-equivalent hydrogen that are accurate to 30% within the polar craters. Abstract Copyright (2013), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Teodoro, L F A AU - Eke, V R AU - Elphic, R C AU - Feldman, W C AU - Lawrence, D J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 574 EP - 593 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 3 SN - 2169-9097, 2169-9097 KW - water KW - polar regions KW - Lunar Prospector Neutron Spectrometer KW - Moon KW - statistical analysis KW - Lunar Prospector Program KW - mapping KW - Lunar Exploration Neutron Detector KW - distribution KW - lunar craters KW - measurement KW - Shoemaker Crater KW - neutrons KW - hydrogen KW - epithermal neutrons KW - autocorrelation KW - orbital observations KW - instruments KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618132498?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=How+well+do+we+know+the+polar+hydrogen+distribution+on+the+Moon%3F&rft.au=Teodoro%2C+L+F+A%3BEke%2C+V+R%3BElphic%2C+R+C%3BFeldman%2C+W+C%3BLawrence%2C+D+J&rft.aulast=Teodoro&rft.aufirst=L+F&rft.date=2014-03-01&rft.volume=119&rft.issue=3&rft.spage=574&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004421 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 - 46 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - autocorrelation; distribution; epithermal neutrons; hydrogen; instruments; lunar craters; Lunar Exploration Neutron Detector; Lunar Prospector Neutron Spectrometer; Lunar Prospector Program; mapping; measurement; Moon; neutrons; orbital observations; polar regions; remote sensing; Shoemaker Crater; statistical analysis; water DO - http://dx.doi.org/10.1002/2013JE004421 ER - TY - JOUR T1 - Global inventory and characterization of pyroclastic deposits on Mercury; new insights into pyroclastic activity from MESSENGER orbital data AN - 1618132329; 2014-084345 AB - We present new observations of pyroclastic deposits on the surface of Mercury from data acquired during the orbital phase of the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission. The global analysis of pyroclastic deposits brings the total number of such identified features from 40 to 51. Some 90% of pyroclastic deposits are found within impact craters. The locations of most pyroclastic deposits appear to be unrelated to regional smooth plains deposits, except some deposits cluster around the margins of smooth plains, similar to the relation between many lunar pyroclastic deposits and lunar maria. A survey of the degradation state of the impact craters that host pyroclastic deposits suggests that pyroclastic activity occurred on Mercury over a prolonged interval. Measurements of surface reflectance by MESSENGER indicate that the pyroclastic deposits are spectrally distinct from their surrounding terrain, with higher reflectance values, redder (i.e., steeper) spectral slopes, and a downturn at wavelengths shorter than approximately 400 nm (i.e., in the near-ultraviolet region of the spectrum). Three possible causes for these distinctive characteristics include differences in transition metal content, physical properties (e.g., grain size), or degree of space weathering from average surface material on Mercury. The strength of the near-ultraviolet downturn varies among spectra of pyroclastic deposits and is correlated with reflectance at visible wavelengths. We suggest that this interdeposit variability in reflectance spectra is the result of either variable amounts of mixing of the pyroclastic deposits with underlying material or inherent differences in chemical and physical properties among pyroclastic deposits. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Goudge, Timothy A AU - Head, James W AU - Kerber, Laura AU - Blewett, David T AU - Denevi, Brett W AU - Domingue, Deborah L AU - Gillis-Davis, Jeffrey J AU - Gwinner, Klaus AU - Helbert, Joern AU - Holsclaw, Gregory M AU - Izenberg, Noam R AU - Klima, Rachel L AU - McClintock, William E AU - Murchie, Scott L AU - Neumann, Gregory A AU - Smith, David E AU - Strom, Robert G AU - Xiao, Zhiyong AU - Zuber, Maria T AU - Solomon, Sean C Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 635 EP - 658 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 3 SN - 2169-9097, 2169-9097 KW - degradation KW - volcanic rocks KW - impact features KW - igneous rocks KW - characterization KW - volcanism KW - Mansurian KW - Mercury Planet KW - age KW - ultraviolet spectra KW - spectra KW - orbital observations KW - Calorian KW - vents KW - MErcury Surface, Space ENvironment, GEochemistry, and Ranging Mission KW - global KW - morphometry KW - weathering KW - terrestrial planets KW - pyroclastics KW - planets KW - space weathering KW - physical properties KW - metals KW - inventory KW - impact craters KW - MESSENGER Mission KW - reflectance KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618132329?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Global+inventory+and+characterization+of+pyroclastic+deposits+on+Mercury%3B+new+insights+into+pyroclastic+activity+from+MESSENGER+orbital+data&rft.au=Goudge%2C+Timothy+A%3BHead%2C+James+W%3BKerber%2C+Laura%3BBlewett%2C+David+T%3BDenevi%2C+Brett+W%3BDomingue%2C+Deborah+L%3BGillis-Davis%2C+Jeffrey+J%3BGwinner%2C+Klaus%3BHelbert%2C+Joern%3BHolsclaw%2C+Gregory+M%3BIzenberg%2C+Noam+R%3BKlima%2C+Rachel+L%3BMcClintock%2C+William+E%3BMurchie%2C+Scott+L%3BNeumann%2C+Gregory+A%3BSmith%2C+David+E%3BStrom%2C+Robert+G%3BXiao%2C+Zhiyong%3BZuber%2C+Maria+T%3BSolomon%2C+Sean+C&rft.aulast=Goudge&rft.aufirst=Timothy&rft.date=2014-03-01&rft.volume=119&rft.issue=3&rft.spage=635&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004480 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 - 88 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables, sketch maps N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - age; Calorian; characterization; degradation; global; igneous rocks; impact craters; impact features; inventory; Mansurian; Mercury Planet; MErcury Surface, Space ENvironment, GEochemistry, and Ranging Mission; MESSENGER Mission; metals; morphometry; orbital observations; physical properties; planets; pyroclastics; reflectance; space weathering; spectra; terrestrial planets; ultraviolet spectra; vents; volcanic rocks; volcanism; weathering DO - http://dx.doi.org/10.1002/2013JE004480 ER - TY - JOUR T1 - Charged particle spectra obtained with the Mars Science Laboratory Radiation Assessment Detector (MSL/RAD) on the surface of Mars AN - 1618131996; 2014-084336 AB - The Radiation Assessment Detector (RAD)-situated inside the Mars Science Laboratory's Curiosity rover-is the first ever instrument to measure the energetic particle radiation environment on the surface of Mars. To fully understand the influence of this surface radiation field in terms of potential hazard to life, a detailed knowledge of its composition is necessary. Charged particles are a major component of this environment, both galactic cosmic rays propagating to the Martian surface and secondary particles created by interactions of these cosmic rays with the atoms of the Martian atmosphere and soil. Here we present particle fluxes for a wide range of ion species, providing detailed energy spectra in the low-energy range (up to several hundred MeV/nucleon particle energy), and integral fluxes for higher energies. In addition to being crucial for the understanding of the hazards of this radiation to possible future manned missions to Mars, the data reported here provide valuable input for evaluating and validating particle transport models currently used to estimate the radiation environment on Mars and elsewhere in space. It is now possible for the first time to compare model results for expected surface particle fluxes with actual ground-based measurements. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Ehresmann, Bent AU - Zeitlin, Cary AU - Hassler, Donald M AU - Wimmer-Schweingruber, Robert F AU - Boehm, Eckart AU - Boettcher, Stephan AU - Brinza, David E AU - Burmeister, Soenke AU - Guo, Jingnan AU - Koehler, Jan AU - Martin, Cesar AU - Posner, Arik AU - Rafkin, Scot C R AU - Reitz, Guenther Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 468 EP - 479 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 3 SN - 2169-9097, 2169-9097 KW - soils KW - galactic cosmic rays KW - in situ KW - atmosphere KW - Mars KW - simulation KW - ions KW - measurement KW - energetic particles KW - terrestrial planets KW - Radiation Assessment Detector KW - planets KW - background radiation KW - Curiosity Rover KW - natural hazards KW - Mars Science Laboratory KW - risk assessment KW - spectra KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618131996?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Charged+particle+spectra+obtained+with+the+Mars+Science+Laboratory+Radiation+Assessment+Detector+%28MSL%2FRAD%29+on+the+surface+of+Mars&rft.au=Ehresmann%2C+Bent%3BZeitlin%2C+Cary%3BHassler%2C+Donald+M%3BWimmer-Schweingruber%2C+Robert+F%3BBoehm%2C+Eckart%3BBoettcher%2C+Stephan%3BBrinza%2C+David+E%3BBurmeister%2C+Soenke%3BGuo%2C+Jingnan%3BKoehler%2C+Jan%3BMartin%2C+Cesar%3BPosner%2C+Arik%3BRafkin%2C+Scot+C+R%3BReitz%2C+Guenther&rft.aulast=Ehresmann&rft.aufirst=Bent&rft.date=2014-03-01&rft.volume=119&rft.issue=3&rft.spage=468&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004547 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 - 27 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - atmosphere; background radiation; Curiosity Rover; energetic particles; galactic cosmic rays; in situ; instruments; ions; Mars; Mars Science Laboratory; measurement; natural hazards; planets; Radiation Assessment Detector; risk assessment; simulation; soils; spectra; terrestrial planets DO - http://dx.doi.org/10.1002/2013JE004547 ER - TY - JOUR T1 - Thermal tides during the 2001 Martian global-scale dust storm AN - 1618131309; 2014-084338 AB - The 2001 (Mars Year 25) global dust storm radically altered the dynamics of the Martian atmosphere. Using observations from the Thermal Emission Spectrometer onboard the Mars Global Surveyor spacecraft and MarsWRF general circulation model simulations, we examine the changes to thermal tides and planetary waves caused by the storm. We find that the extratropical diurnal migrating tide is dramatically enhanced during the storm, particularly in the southern hemisphere, reaching amplitudes of more than 20 K. The tropical diurnal migrating tide is weakened to almost undetectable levels. The diurnal Kelvin waves are also significantly weakened, particularly during the period of global expansion at L (sub s) = 200 degrees -210 degrees . In contrast, the westward propagating diurnal wavenumber 2 tide strengthens to 4-8 K at altitudes above 30 km. The wavenumber 1 stationary wave reaches amplitudes of 10-12 K at 50 degrees -70 degrees N, far larger than is typically seen during this time of year. The phase of this stationary wave and the enhancement of the diurnal wavenumber 2 tide appear to be responses to the high-altitude westward propagating equatorial wavenumber 1 structure in dust mixing ratio observed during the storm in previous works. This work provides a global picture of dust storm wave dynamics that reveals the coupling between the tropics and high-latitude wave responses. We conclude that the zonal distribution of thermotidal forcing from atmospheric aerosol concentration is as important to understanding the atmospheric wave response as the total global mean aerosol optical depth. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Guzewich, Scott D AU - Wilson, R John AU - McConnochie, Timothy H AU - Toigo, Anthony D AU - Banfield, Donald J AU - Smith, Michael D Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 506 EP - 519 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 3 SN - 2169-9097, 2169-9097 KW - Rossby waves KW - dust storms KW - general circulation models KW - clastic sediments KW - thermal tides KW - atmosphere KW - Mars KW - simulation KW - temperature KW - tides KW - terrestrial planets KW - planets KW - dynamics KW - mixing KW - dust KW - Thermal Emission Spectrometer KW - sediments KW - Mars Global Surveyor Program KW - storms KW - latitude KW - diurnal variations KW - optical depth KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618131309?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Thermal+tides+during+the+2001+Martian+global-scale+dust+storm&rft.au=Guzewich%2C+Scott+D%3BWilson%2C+R+John%3BMcConnochie%2C+Timothy+H%3BToigo%2C+Anthony+D%3BBanfield%2C+Donald+J%3BSmith%2C+Michael+D&rft.aulast=Guzewich&rft.aufirst=Scott&rft.date=2014-03-01&rft.volume=119&rft.issue=3&rft.spage=506&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004502 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 - 48 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - atmosphere; clastic sediments; diurnal variations; dust; dust storms; dynamics; general circulation models; latitude; Mars; Mars Global Surveyor Program; mixing; optical depth; planets; Rossby waves; sediments; simulation; storms; temperature; terrestrial planets; Thermal Emission Spectrometer; thermal tides; tides DO - http://dx.doi.org/10.1002/2013JE004502 ER - TY - JOUR T1 - The meteoroid fluence at Mars due to Comet C/2013 A1 (Siding Spring) AN - 1560084085; 2014-068966 JF - Icarus AU - Moorhead, Althea V AU - Wiegert, Paul A AU - Cooke, William J Y1 - 2014/03/01/ PY - 2014 DA - 2014 Mar 01 SP - 13 EP - 21 PB - Elsevier, New York, NY VL - 231 SN - 0019-1035, 0019-1035 KW - Siding Spring Comet KW - numerical models KW - Stardust Mission KW - Mars KW - meteoroids KW - comae KW - terrestrial planets KW - models KW - spatial distribution KW - planets KW - size distribution KW - meteoroid fluence KW - comets KW - micrometeoroids KW - Halley's Comet KW - Giotto Mission KW - spacecraft KW - natural hazards KW - Wild 2 Comet KW - cometary dust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560084085?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+meteoroid+fluence+at+Mars+due+to+Comet+C%2F2013+A1+%28Siding+Spring%29&rft.au=Moorhead%2C+Althea+V%3BWiegert%2C+Paul+A%3BCooke%2C+William+J&rft.aulast=Moorhead&rft.aufirst=Althea&rft.date=2014-03-01&rft.volume=231&rft.issue=&rft.spage=13&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.11.028 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 42 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-09-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - comae; cometary dust; comets; Giotto Mission; Halley's Comet; Mars; meteoroid fluence; meteoroids; micrometeoroids; models; natural hazards; numerical models; planets; Siding Spring Comet; size distribution; spacecraft; spatial distribution; Stardust Mission; terrestrial planets; Wild 2 Comet DO - http://dx.doi.org/10.1016/j.icarus.2013.11.028 ER - TY - JOUR T1 - The formation of sulfate, nitrate and perchlorate salts in the Martian atmosphere AN - 1560083075; 2014-068969 JF - Icarus AU - Smith, Megan L AU - Claire, Mark W AU - Catling, David C AU - Zahnle, Kevin J Y1 - 2014/03/01/ PY - 2014 DA - 2014 Mar 01 SP - 51 EP - 64 PB - Elsevier, New York, NY VL - 231 SN - 0019-1035, 0019-1035 KW - perchloric acid KW - Mars Phoenix Lander KW - one-dimensional models KW - halogens KW - Mars KW - nitrogen KW - chemical reactions KW - Amazonian KW - volcanism KW - sensitivity analysis KW - mixing KW - soils KW - chlorine KW - sulfate ion KW - sulfates KW - photochemistry KW - nitrates KW - atmosphere KW - rates KW - pernitrate KW - pernitric acid KW - perchlorate KW - gases KW - terrestrial planets KW - models KW - planets KW - deposition KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560083075?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+formation+of+sulfate%2C+nitrate+and+perchlorate+salts+in+the+Martian+atmosphere&rft.au=Smith%2C+Megan+L%3BClaire%2C+Mark+W%3BCatling%2C+David+C%3BZahnle%2C+Kevin+J&rft.aulast=Smith&rft.aufirst=Megan&rft.date=2014-03-01&rft.volume=231&rft.issue=&rft.spage=51&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.11.031 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 114 N1 - PubXState - NY N1 - Document feature - illus. incl. 7 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-09-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - Amazonian; atmosphere; chemical reactions; chlorine; deposition; gases; halogens; Mars; Mars Phoenix Lander; mixing; models; nitrates; nitrogen; one-dimensional models; perchlorate; perchloric acid; pernitrate; pernitric acid; photochemistry; planets; rates; sensitivity analysis; soils; sulfate ion; sulfates; terrestrial planets; volcanism DO - http://dx.doi.org/10.1016/j.icarus.2013.11.031 ER - TY - JOUR T1 - The distribution of methane in Titan's stratosphere from Cassini/CIRS observations AN - 1560082814; 2014-068991 JF - Icarus AU - Lellouch, E AU - Bezard, B AU - Flasar, F M AU - Vinatier, S AU - Achterberg, R AU - Nixon, C A AU - Bjoraker, G L AU - Gorius, N Y1 - 2014/03/01/ PY - 2014 DA - 2014 Mar 01 SP - 323 EP - 337 PB - Elsevier, New York, NY VL - 231 SN - 0019-1035, 0019-1035 KW - icy satellites KW - methane KW - nadir observations KW - aliphatic hydrocarbons KW - troposphere KW - alkanes KW - convection KW - distribution KW - limb observations KW - infrared spectra KW - organic compounds KW - Cassini-Huygens Mission KW - stratosphere KW - mixing KW - hydrocarbons KW - Titan Satellite KW - Composite Infrared Spectrometer KW - spectra KW - latitude KW - satellites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560082814?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=The+distribution+of+methane+in+Titan%27s+stratosphere+from+Cassini%2FCIRS+observations&rft.au=Lellouch%2C+E%3BBezard%2C+B%3BFlasar%2C+F+M%3BVinatier%2C+S%3BAchterberg%2C+R%3BNixon%2C+C+A%3BBjoraker%2C+G+L%3BGorius%2C+N&rft.aulast=Lellouch&rft.aufirst=E&rft.date=2014-03-01&rft.volume=231&rft.issue=&rft.spage=323&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.12.016 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 58 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-09-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; Cassini-Huygens Mission; Composite Infrared Spectrometer; convection; distribution; hydrocarbons; icy satellites; infrared spectra; latitude; limb observations; methane; mixing; nadir observations; organic compounds; satellites; spectra; stratosphere; Titan Satellite; troposphere DO - http://dx.doi.org/10.1016/j.icarus.2013.12.016 ER - TY - JOUR T1 - Rotational variation of daughter species production rates in comet 103P/Hartley; implications for the progeny of daughter species and the degree of chemical heterogeneity AN - 1560082695; 2014-068981 JF - Icarus AU - McKay, Adam J AU - Chanover, Nancy J AU - DiSanti, Michael A AU - Morgenthaler, Jeffrey P AU - Cochran, Anita L AU - Harris, Walter M AU - Dello Russo, Neil Y1 - 2014/03/01/ PY - 2014 DA - 2014 Mar 01 SP - 193 EP - 205 PB - Elsevier, New York, NY VL - 231 SN - 0019-1035, 0019-1035 KW - water KW - carbonaceous composition KW - high-resolution methods KW - ammonium KW - optical spectra KW - photochemistry KW - cometary nuclei KW - comae KW - sublimation KW - organic compounds KW - Hartley 2 Comet KW - comets KW - rotation KW - photolysis KW - mixing KW - ice KW - carbon KW - hydrocarbons KW - hydrogen cyanide KW - spectra KW - heterogeneity KW - cyanides KW - chemical composition KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560082695?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Rotational+variation+of+daughter+species+production+rates+in+comet+103P%2FHartley%3B+implications+for+the+progeny+of+daughter+species+and+the+degree+of+chemical+heterogeneity&rft.au=McKay%2C+Adam+J%3BChanover%2C+Nancy+J%3BDiSanti%2C+Michael+A%3BMorgenthaler%2C+Jeffrey+P%3BCochran%2C+Anita+L%3BHarris%2C+Walter+M%3BDello+Russo%2C+Neil&rft.aulast=McKay&rft.aufirst=Adam&rft.date=2014-03-01&rft.volume=231&rft.issue=&rft.spage=193&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.11.029 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 26 N1 - PubXState - NY N1 - Document feature - illus. incl. 7 tables N1 - Last updated - 2014-09-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - ammonium; carbon; carbonaceous composition; chemical composition; comae; cometary nuclei; comets; cyanides; Hartley 2 Comet; heterogeneity; high-resolution methods; hydrocarbons; hydrogen cyanide; ice; mixing; optical spectra; organic compounds; photochemistry; photolysis; rotation; spectra; sublimation; water DO - http://dx.doi.org/10.1016/j.icarus.2013.11.029 ER - TY - JOUR T1 - The influence of slope breaks on lava flow surface disruption AN - 1535205419; 2014-039023 AB - Changes in the underlying slope of a lava flow impart a significant fraction of rotational energy beyond the slope break. The eddies, circulation, and vortices caused by this rotational energy can disrupt the flow surface, having a significant impact on heat loss and thus the distance the flow can travel. A basic mechanics model is used to compute the rotational energy caused by a slope change. The gain in rotational energy is deposited into an eddy of radius R whose energy is dissipated as it travels downstream. A model of eddy friction with the ambient lava is used to compute the time-rate of energy dissipation. The key parameter of the dissipation rate is shown to be rho R (super 2) /mu , where rho is the lava density and mu is the viscosity, which can vary by orders of magnitude for different flows. The potential spatial disruption of the lava flow surface is investigated by introducing steady state models for the main flow beyond the steepening slope break. One model applies to slow-moving flows with both gravity and pressure as the driving forces. The other model applies to fast-moving, low-viscosity, turbulent flows. These models provide the flow velocity that establishes the downstream transport distance of disrupting eddies before they dissipate. The potential influence of slope breaks is discussed in connection with field studies of lava flows from the 1801 Hualalai and 1823 Keaiwa Kilauea, Hawaii, and 2004 Etna eruptions. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Glaze, Lori S AU - Baloga, Stephen M AU - Fagents, Sarah A AU - Wright, Robert Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 1837 EP - 1850 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 3 SN - 2169-9313, 2169-9313 KW - United States KW - Hawaii Island KW - volcanic rocks KW - density KW - slopes KW - igneous rocks KW - Europe KW - Italy KW - Southern Europe KW - topography KW - pyroclastic flows KW - volcanism KW - velocity KW - Kilauea KW - numerical models KW - lava flows KW - Hawaii County Hawaii KW - textures KW - Mount Etna KW - flow mechanism KW - Hawaii KW - mathematical models KW - East Pacific Ocean Islands KW - pyroclastics KW - Sicily Italy KW - lava KW - eruptions KW - Oceania KW - volcanoes KW - Polynesia KW - flow texture KW - 24:Quaternary geology KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535205419?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+influence+of+slope+breaks+on+lava+flow+surface+disruption&rft.au=Glaze%2C+Lori+S%3BBaloga%2C+Stephen+M%3BFagents%2C+Sarah+A%3BWright%2C+Robert&rft.aulast=Glaze&rft.aufirst=Lori&rft.date=2014-03-01&rft.volume=119&rft.issue=3&rft.spage=1837&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2013JB010696 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 - 22 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - density; East Pacific Ocean Islands; eruptions; Europe; flow mechanism; flow texture; Hawaii; Hawaii County Hawaii; Hawaii Island; igneous rocks; Italy; Kilauea; lava; lava flows; mathematical models; Mount Etna; numerical models; Oceania; Polynesia; pyroclastic flows; pyroclastics; Sicily Italy; slopes; Southern Europe; textures; topography; United States; velocity; volcanic rocks; volcanism; volcanoes DO - http://dx.doi.org/10.1002/2013JB010696 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 - Nebulized Liposomal Amphotericin B for Treating Aspergillus Empyema with Bronchopleural Fistula AN - 1508767080; 24579838 JF - American Journal of Respiratory and Critical Care Medicine AU - Hanada, Shigeo, MD AU - Uruga, Hironori, MD AU - Takaya, Hisashi, MD AU - Miyamoto, Atsushi, MD AU - Morokawa, Nasa, MD, PhD AU - Kurosaki, Atsuko, MD AU - Kishi, Kazuma, MD, PhD Y1 - 2014/03/01/ PY - 2014 DA - 2014 Mar 01 SP - 607 EP - 8 CY - New York PB - American Thoracic Society VL - 189 IS - 5 SN - 1073449X KW - Medical Sciences--Respiratory Diseases KW - Antifungal Agents KW - liposomal amphotericin B KW - Amphotericin B KW - Pulmonary Aspergillosis -- complications KW - Pulmonary Aspergillosis -- diagnosis KW - Humans KW - Empyema -- diagnosis KW - Empyema -- complications KW - Middle Aged KW - Administration, Inhalation KW - Male KW - Amphotericin B -- therapeutic use KW - Antifungal Agents -- therapeutic use KW - Aspergillus fumigatus -- isolation & purification KW - Bronchial Fistula -- microbiology KW - Pleural Diseases -- microbiology KW - Pulmonary Aspergillosis -- drug therapy KW - Empyema -- drug therapy KW - Amphotericin B -- administration & dosage KW - Antifungal Agents -- administration & dosage UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1508767080?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthcompleteshell&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Journal+of+Respiratory+and+Critical+Care+Medicine&rft.atitle=Nebulized+Liposomal+Amphotericin+B+for+Treating+Aspergillus+Empyema+with+Bronchopleural+Fistula&rft.au=Hanada%2C+Shigeo%2C+MD%3BUruga%2C+Hironori%2C+MD%3BTakaya%2C+Hisashi%2C+MD%3BMiyamoto%2C+Atsushi%2C+MD%3BMorokawa%2C+Nasa%2C+MD%2C+PhD%3BKurosaki%2C+Atsuko%2C+MD%3BKishi%2C+Kazuma%2C+MD%2C+PhD&rft.aulast=Hanada&rft.aufirst=Shigeo&rft.date=2014-03-01&rft.volume=189&rft.issue=5&rft.spage=607&rft.isbn=&rft.btitle=&rft.title=American+Journal+of+Respiratory+and+Critical+Care+Medicine&rft.issn=1073449X&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright American Thoracic Society Mar 1, 2014 N1 - Last updated - 2017-01-07 ER - TY - JOUR T1 - On the ratio between shifts in the eddy-driven jet and the Hadley cell edge AN - 1505338714; 19347567 AB - This study explores the relationship between latitudinal shifts in the eddy-driven jet and in the Hadley cell edge as depicted in models and reanalyses. We calculate an interannual shift ratio of approximately 1.5:1 between the eddy-driven jet and the Hadley cell edge over the Southern Hemisphere during austral summer in model data. We further find that the ratio varies from season to season, with similarities between corresponding seasons over each hemisphere. Ratios are broadly consistent between models in this study, and appear to be realistic when compared to those from reanalyses. Mean tropical SSTs and the strength of zonal winds in the tropics appear to be critical to determining the ratio, while sea surface temperature variability is not. We argue that conditions in the tropics act to modulate the effect of midlatitude eddies on the Hadley cell, and the action of eddies in turn explains most of the correlated shifts from year to year. In contrast, the mean state of the tropics is a poor predictor of both the ratio of observed trends in reanalyses and the ratio of modeled externally forced shifts. We show that the ratios of modeled shifts are dependent on the type of external forcing. JF - Climate Dynamics AU - Staten, Paul W AU - Reichler, Thomas AD - Department of Atmospheric Sciences, University of Utah, 135 South 1460 East Room 819, Salt Lake City, UT, 84112-0110, USA, paul.w.staten@jpl.nasa.gov Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 1229 EP - 1242 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 42 IS - 5-6 SN - 0930-7575, 0930-7575 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Marine KW - Variability KW - Climate models KW - Sea surface temperature variability KW - Climates KW - Temperature KW - Hadley cells KW - Zonal winds KW - Oceanic eddies KW - Data reanalysis KW - Model Studies KW - Strength KW - Eddies KW - Latitudinal variations KW - Seasonal variability KW - Sea surface temperatures KW - Wind KW - SW 5010:Network design KW - M2 551.58:Climatology (551.58) KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1505338714?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+Dynamics&rft.atitle=On+the+ratio+between+shifts+in+the+eddy-driven+jet+and+the+Hadley+cell+edge&rft.au=Staten%2C+Paul+W%3BReichler%2C+Thomas&rft.aulast=Staten&rft.aufirst=Paul&rft.date=2014-03-01&rft.volume=42&rft.issue=5-6&rft.spage=1229&rft.isbn=&rft.btitle=&rft.title=Climate+Dynamics&rft.issn=09307575&rft_id=info:doi/10.1007%2Fs00382-013-1905-7 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-01 N1 - Number of references - 47 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Latitudinal variations; Oceanic eddies; Climate models; Sea surface temperature variability; Hadley cells; Zonal winds; Seasonal variability; Sea surface temperatures; Data reanalysis; Strength; Variability; Eddies; Climates; Temperature; Wind; Model Studies; Marine DO - http://dx.doi.org/10.1007/s00382-013-1905-7 ER - TY - JOUR T1 - Simultaneous improvement of specificity and affinity of aptamers against Streptococcus mutans by in silico maturation for biosensor development AN - 1492268398 AB - In silico evolution with an in vitro system can facilitate the development of functional aptamers with high specificity and affinity. Although a general technique known as systematic evolution of ligand by exponential enrichment (SELEX) is an efficient method for aptamer selection, it sometimes fails to identify aptamers with sufficient binding properties. We have previously developed in silico maturation (ISM) to improve functions of aptamers based on genetic algorithms. ISM represents an intelligent exploitation of a random search within a defined sequence space to optimize aptamer sequences and improve their function of interest. Here we demonstrated a successful application of ISM of aptamers to simultaneously improve specificity and affinity for Streptococcus mutans with discovery of a core sequence, which was required to form a polymerized guanine quadruplex structure for target binding. We applied ISM to aptamers selected by whole-cell SELEX and identified an aptamer with up to 16-fold improvement in affinity compared to its parent aptamers, and specificity was increased to show 12-fold more binding to S. mutans than to Lactobacillus acidophilus. Furthermore, we demonstrated a specific flow-through detection of S. mutans at a concentration range of 1 x 10^sup 5^-10^sup 8^ CFU/mL using the evolved aptamer immobilized on gold colloids. [PUBLICATION ABSTRACT] JF - Biotechnology and Bioengineering AU - Savory, Nasa AU - Takahashi, Yayoi AU - Tsukakoshi, Kaori AU - Hasegawa, Hijiri AU - Takase, Madoka AU - Abe, Koichi AU - Yoshida, Wataru AU - Ferri, Stefano AU - Kumazawa, Shizuko AU - Sode, Koji AU - Ikebukuro, Kazunori Y1 - 2014/03// PY - 2014 DA - Mar 2014 SP - 454 CY - New York PB - Wiley Subscription Services, Inc. VL - 111 IS - 3 SN - 00063592 KW - Biology--Biochemistry KW - Peptides KW - Gram-positive bacteria KW - Computer simulation KW - Biosensors KW - Genetic algorithms KW - Maturation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492268398?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biotechnology+and+Bioengineering&rft.atitle=Simultaneous+improvement+of+specificity+and+affinity+of+aptamers+against+Streptococcus+mutans+by+in+silico+maturation+for+biosensor+development&rft.au=Savory%2C+Nasa%3BTakahashi%2C+Yayoi%3BTsukakoshi%2C+Kaori%3BHasegawa%2C+Hijiri%3BTakase%2C+Madoka%3BAbe%2C+Koichi%3BYoshida%2C+Wataru%3BFerri%2C+Stefano%3BKumazawa%2C+Shizuko%3BSode%2C+Koji%3BIkebukuro%2C+Kazunori&rft.aulast=Savory&rft.aufirst=Nasa&rft.date=2014-03-01&rft.volume=111&rft.issue=3&rft.spage=454&rft.isbn=&rft.btitle=&rft.title=Biotechnology+and+Bioengineering&rft.issn=00063592&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright John Wiley and Sons, Limited Mar 2014 N1 - Last updated - 2014-11-22 N1 - CODEN - BIBIAU ER - TY - NEWS T1 - California Drought AN - 1501650707 JF - UPI Space Daily AU - Dr. Tony Phillips for NASA Science News Y1 - 2014/02/25/ PY - 2014 DA - 2014 Feb 25 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1501650707?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=California+Drought&rft.au=Dr.+Tony+Phillips+for+NASA+Science+News&rft.aulast=Dr.+Tony+Phillips+for+NASA+Science+News&rft.aufirst=&rft.date=2014-02-25&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-02-25 ER - TY - NEWS T1 - Putting Rovers to the Test AN - 1501143141 JF - UPI Space Daily AU - Nancy Smith Kilkenny for Glenn Research Center Y1 - 2014/02/23/ PY - 2014 DA - 2014 Feb 23 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1501143141?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Putting+Rovers+to+the+Test&rft.au=Nancy+Smith+Kilkenny+for+Glenn+Research+Center&rft.aulast=Nancy+Smith+Kilkenny+for+Glenn+Research+Center&rft.aufirst=&rft.date=2014-02-23&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-02-23 ER - TY - NEWS T1 - NASA Study Points to Infrared-Herring in Apparent Amazon Green-Up AN - 1501142916 JF - UPI Space Daily AU - Kathryn Hansen for NASA Earth Science News Y1 - 2014/02/23/ PY - 2014 DA - 2014 Feb 23 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1501142916?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NASA+Study+Points+to+Infrared-Herring+in+Apparent+Amazon+Green-Up&rft.au=Kathryn+Hansen+for+NASA+Earth+Science+News&rft.aulast=Kathryn+Hansen+for+NASA+Earth+Science+News&rft.aufirst=&rft.date=2014-02-23&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-02-23 ER - TY - JOUR T1 - EXPERIMENTAL STUDIES ON THE FORMATION OF D sub(2)O AND D sub(2)O sub(2) BY IMPLANTATION OF ENERGETIC D super(+) IONS INTO OXYGEN ICES AN - 1701492471; PQ0001795398 AB - The formation of water (H sub(2)O) in the interstellar medium is intrinsically linked to grain-surface chemistry; thought to involve reactions between atomic (or molecular) hydrogen with atomic oxygen (O), molecular oxygen (O sub(2)), and ozone (O sub(3)). Laboratory precedent suggests that H sub(2)O is produced efficiently when O sub(2) ices are exposed to H atoms (~100K). This leads to the sequential generation of the hydroxyperoxyl radical (HO sub(2)), then hydrogen peroxide (H sub(2)O sub(2)), and finally H sub(2)O and a hydroxyl radical (OH); despite a barrier of ~2300 K for the last step. Recent detection of the four involved species toward [rho] Oph A supports this general scenario; however, the precise formation mechanism remains undetermined. Here, solid O sub(2) ice held at 12 K is exposed to a monoenergetic beam of 5 keV D super(+) ions. Products formed during the irradiation period are monitored through FTIR spectroscopy. O sub(3) is observed through seven archetypal absorptions. Three additional bands found at 2583, 2707, and 1195 cm super(-1) correspond to matrix isolated DO sub(2) (v sub(1)) and D sub(2)O sub(2) (v sub(1), V sub(5)), and D sub(2)O (v sub(2)), respectively. During subsequent warming, the O sub(2) ice sublimates, revealing a broad band at 2472 cm super(-1) characteristic of amorphous D sub(2)O (v sub(1), v sub(3)). Sublimating D sub(2), D sub(2)O, D sub(2)O sub(2), and O sub(3) products were confirmed through their subsequent detection via quadrupole mass spectrometry. Reaction schemes based on both thermally accessible and suprathermally induced chemistries were developed to fit the observed temporal profiles are used to elucidate possible reaction pathways for the formation of D sub(2)-water. Several alternative schemes to the hydrogenation pathway (O sub(2) arrow right HO sub(2) arrow right H sub(2)O sub(2) arrow right H sub(2 )O) were identified; their astrophysical implications are briefly discussed. JF - Astrophysical Journal AU - Bennett, Chris J AU - Ennis, Courtney P AU - Kaiser, Ralf I AD - Department of Chemistry, University of Hawai'i at Manoa, Honolulu, HI 96822, USA; Institute for Astronomy and NASA Astrobiology Institute, 2680 Woodlawn Drive, University of Hawai'i, Honolulu, HI 96822, USA; Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA 30332-0400, USA, ralfk@hawaii.edu Y1 - 2014/02/20/ PY - 2014 DA - 2014 Feb 20 SP - 1 EP - 13 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 782 IS - 2 SN - 0004-637X, 0004-637X KW - Meteorological & Geoastrophysical Abstracts; Biotechnology and Bioengineering Abstracts KW - astrochemistry KW - cosmic rays KW - ISM: molecules KW - methods: laboratory: solid state KW - molecular processes KW - radiation mechanisms: non-thermal KW - Ice KW - Ions KW - Free radicals KW - Mass spectrometry KW - Hydrogenation KW - Hydrogen KW - Spectroscopy KW - Mass spectroscopy KW - Oxygen KW - Interstellar medium KW - Radiation KW - Hydrogen peroxide KW - I.R. spectroscopy KW - Radicals KW - Ozone KW - M2 52:C. Astrophysics (52) KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701492471?accountid=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=Astrophysical+Journal&rft.atitle=EXPERIMENTAL+STUDIES+ON+THE+FORMATION+OF+D+sub%282%29O+AND+D+sub%282%29O+sub%282%29+BY+IMPLANTATION+OF+ENERGETIC+D+super%28%2B%29+IONS+INTO+OXYGEN+ICES&rft.au=Bennett%2C+Chris+J%3BEnnis%2C+Courtney+P%3BKaiser%2C+Ralf+I&rft.aulast=Bennett&rft.aufirst=Chris&rft.date=2014-02-20&rft.volume=782&rft.issue=2&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F782%2F2%2F63 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Ions; Oxygen; Ice; Radiation; I.R. spectroscopy; Hydrogen peroxide; Free radicals; Hydrogen; Hydrogenation; Mass spectroscopy; Ozone; Radicals; Interstellar medium; Mass spectrometry; Spectroscopy DO - http://dx.doi.org/10.1088/0004-637X/782/2/63 ER - TY - NEWS T1 - NASA Extends Moon Exploring Satellite Mission AN - 1498335932 JF - UPI Space Daily AU - Rachel Hoover for Ames Research Center Y1 - 2014/02/16/ PY - 2014 DA - 2014 Feb 16 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1498335932?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=NASA+Extends+Moon+Exploring+Satellite+Mission&rft.au=Rachel+Hoover+for+Ames+Research+Center&rft.aulast=Rachel+Hoover+for+Ames+Research+Center&rft.aufirst=&rft.date=2014-02-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-02-16 ER - TY - JOUR T1 - Mars Global Digital Dune Database (MGD (super 3) ); global dune distribution and wind pattern observations AN - 1524613897; 2014-033347 AB - The Mars Global Digital Dune Database (MGD (super 3) ) is complete and now extends from 90 degrees N to 90 degrees S latitude. The recently released south pole (SP) portion (MC-30) of MGD3 adds approximately 60,000 km (super 2) of medium to large-size dark dune fields and approximately 15,000 km (super 2) of sand deposits and smaller dune fields to the previously released equatorial (EQ, approximately 70,000 km (super 2) ), and north pole (NP, approximately 845,000 km (super 2) ) portions of the database, bringing the global total to approximately 975,000 km (super 2) . Nearly all NP dunes are part of large sand seas, while the majority of EQ and SP dune fields are individual dune fields located in craters. Despite the differences between Mars and Earth, their dune and dune field morphologies are strikingly similar. Bullseye dune fields, named for their concentric ring pattern, are the exception, possibly owing their distinctive appearance to winds that are unique to the crater environment. Ground-based wind directions are derived from slipface (SF) orientation and dune centroid azimuth (DCA), a measure of the relative location of a dune field inside a crater. SF and DCA often preserve evidence of different wind directions, suggesting the importance of local, topographically influenced winds. In general however, ground-based wind directions are broadly consistent with expected global patterns, such as polar easterlies. Intriguingly, between 40 degrees S and 80 degrees S latitude both SF and DCA preserve their strongest, though different, dominant wind direction, with transport toward the west and east for SF-derived winds and toward the north and west for DCA-derived winds. JF - Icarus AU - Hayward, R K AU - Fenton, Lori K AU - Titus, T N Y1 - 2014/02/15/ PY - 2014 DA - 2014 Feb 15 SP - 38 EP - 46 PB - Elsevier, New York, NY VL - 230 SN - 0019-1035, 0019-1035 KW - eolian features KW - orientation KW - patterns KW - THEMIS KW - global KW - Mars KW - ergs KW - Mars Global Digital Dune Database KW - terrestrial planets KW - spatial distribution KW - planets KW - topography KW - transport KW - data bases KW - latitude KW - wind transport KW - sand seas KW - dune fields KW - winds KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524613897?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mars+Global+Digital+Dune+Database+%28MGD+%28super+3%29+%29%3B+global+dune+distribution+and+wind+pattern+observations&rft.au=Hayward%2C+R+K%3BFenton%2C+Lori+K%3BTitus%2C+T+N&rft.aulast=Hayward&rft.aufirst=R&rft.date=2014-02-15&rft.volume=230&rft.issue=&rft.spage=38&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.04.011 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Conference title - Third international planetary dunes workshop N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 57 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2014-05-15 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - data bases; dune fields; eolian features; ergs; global; latitude; Mars; Mars Global Digital Dune Database; orientation; patterns; planets; sand seas; spatial distribution; terrestrial planets; THEMIS; topography; transport; wind transport; winds DO - http://dx.doi.org/10.1016/j.icarus.2013.04.011 ER - TY - JOUR T1 - Morpho-stratigraphic characterization of a tufa mound complex in the Spanish Pyrenees using ground penetrating radar and trenching, implications for studies in Mars AN - 1520102780; 2014-028269 AB - The Isona tufa mound complex (ITMC), associated with artesian springs of the Areny-Montsec aquifer, Spanish Pyrenees, is a potential analog for water constructed landforms on Mars. We used Ground Penetrating Radar (GPR), trenching, sedimentological description of exposures, and radiocarbon and U-series dating methods for the geological characterization of the ITMC. Preliminary geomorphological mapping combined with sedimentological analyses permitted the recognition of the different facies and their spatial distribution. GPR surveys conducted next to an outcrop and a trench provided electromagnetic wave velocity in tufas (0.09 and 0.11 m ns (super -1) ) and determined the correspondence of the radar signatures with facies types. This was used to reconstruct the tufas internal structure and the depositional stages for two different contexts: (1) an upper unit representing the morpho-stratigraphic record of paleosprings - Tufa 1 - composed of relict tufa mounds older than 350 ka BP; and (2) a lower unit - Tufa 3 - associated with groundwater aquifer outlets (Basturs Lakes). The GPR data allowed depicting the signatures for the vent, pool, rimstone, palustrine, dam, cascade and slope facies. A relationship was inferred between the age of the tufas and the radar signature, in terms of relative amplitude and signal attenuation. Older dry tufas with advanced diagenesis and karstification are characterized by well-defined GPR reflectors and lower attenuation than younger tufas, associated with aquifer discharge and shallower water tables. U-series and radiocarbon ages obtained from the Basturs Lakes tufas indicate that these have been active since 106 ka BP during both cold and mild Marine Isotopic Stages (MIS). We hypothesize that tufas related to the deep-seated Areny-Montsec confined karst aquifer were insensitive to climate variations. Landforms reminiscent of the ITMC have been detected during the last decade on Mars. Since GPR will be part of the ExoMars Rover of the European Space Agency (ESA) mission projected for 2018, we anticipate that our results may be able to constrain the interpretation of landforms possibly related to water on Mars. Abstract Copyright (2014) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Pellicer, X M AU - Linares, R AU - Gutierrez, F AU - Comas, X AU - Roque, C AU - Carbonel, D AU - Zarroca, M AU - Rodriguez, J A P Y1 - 2014/02/15/ PY - 2014 DA - 2014 Feb 15 SP - 197 EP - 210 PB - Elsevier, Amsterdam VL - 388 SN - 0012-821X, 0012-821X KW - Areny-Montsec Aquifer KW - Spain KW - ground-penetrating radar KW - Mars KW - landforms KW - karst KW - Europe KW - elastic waves KW - Iberian Peninsula KW - uranium disequilibrium KW - Southern Europe KW - Cenozoic KW - sedimentary rocks KW - Basturs Lakes KW - springs KW - chemically precipitated rocks KW - trenching KW - Quaternary KW - confined aquifers KW - geophysical methods KW - radar methods KW - mounds KW - aquifers KW - terrestrial planets KW - planets KW - diagenesis KW - Spanish Pyrenees KW - traveltime KW - tufa KW - Pyrenees KW - Isona tufa mound KW - facies KW - 24:Quaternary geology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520102780?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Morpho-stratigraphic+characterization+of+a+tufa+mound+complex+in+the+Spanish+Pyrenees+using+ground+penetrating+radar+and+trenching%2C+implications+for+studies+in+Mars&rft.au=Pellicer%2C+X+M%3BLinares%2C+R%3BGutierrez%2C+F%3BComas%2C+X%3BRoque%2C+C%3BCarbonel%2C+D%3BZarroca%2C+M%3BRodriguez%2C+J+A+P&rft.aulast=Pellicer&rft.aufirst=X&rft.date=2014-02-15&rft.volume=388&rft.issue=&rft.spage=197&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2013.11.052 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. incl. sects., 2 tables, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-05-01 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - aquifers; Areny-Montsec Aquifer; Basturs Lakes; Cenozoic; chemically precipitated rocks; confined aquifers; diagenesis; elastic waves; Europe; facies; geophysical methods; ground-penetrating radar; Iberian Peninsula; Isona tufa mound; karst; landforms; Mars; mounds; planets; Pyrenees; Quaternary; radar methods; sedimentary rocks; Southern Europe; Spain; Spanish Pyrenees; springs; terrestrial planets; traveltime; trenching; tufa; uranium disequilibrium DO - http://dx.doi.org/10.1016/j.epsl.2013.11.052 ER - TY - NEWS T1 - ISS MAXI-mizing our understanding of the universe AN - 1494524773 JF - UPI Space Daily AU - Jessica Nimon - International Space Station Program Science Office, NASA's Johnson Space Center Y1 - 2014/02/05/ PY - 2014 DA - 2014 Feb 05 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1494524773?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=ISS+MAXI-mizing+our+understanding+of+the+universe&rft.au=Jessica+Nimon+-+International+Space+Station+Program+Science+Office%2C+NASA%27s+Johnson+Space+Center&rft.aulast=Jessica+Nimon+-+International+Space+Station+Program+Science+Office&rft.aufirst=NASA%27s+Johnson+Space&rft.date=2014-02-05&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-02-05 ER - TY - CPAPER T1 - AWIPS II Application Development, a SPoRT Perspective T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518616403; 6282138 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Burks, Jason AU - Smith, M AU - McGrath, K Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Sports UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518616403?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=AWIPS+II+Application+Development%2C+a+SPoRT+Perspective&rft.au=Burks%2C+Jason%3BSmith%2C+M%3BMcGrath%2C+K&rft.aulast=Burks&rft.aufirst=Jason&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Ocean surface and subsurface studies from space-based lidar measurements T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518616130; 6282190 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Lu, Xiaomei AU - Hu, Y. Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Oceans KW - Lidar UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518616130?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Ocean+surface+and+subsurface+studies+from+space-based+lidar+measurements&rft.au=Lu%2C+Xiaomei%3BHu%2C+Y.&rft.aulast=Lu&rft.aufirst=Xiaomei&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Validation of Weather Research and Forecasting (WRF) Model Simulations of the South American Climate during the Austral Summer of 2003-2004 T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518616029; 6282338 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Nicholls, Stephen AU - Mohr, K Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Prediction KW - Climate KW - Simulation KW - Summer KW - Weather forecasting KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518616029?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Validation+of+Weather+Research+and+Forecasting+%28WRF%29+Model+Simulations+of+the+South+American+Climate+during+the+Austral+Summer+of+2003-2004&rft.au=Nicholls%2C+Stephen%3BMohr%2C+K&rft.aulast=Nicholls&rft.aufirst=Stephen&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Community Coordinated Modeling Center: Models and Applications for Space Weather Forecasting and Analysis T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615987; 6282331 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Kuznetsova, M Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Weather forecasting KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615987?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Community+Coordinated+Modeling+Center%3A+Models+and+Applications+for+Space+Weather+Forecasting+and+Analysis&rft.au=Kuznetsova%2C+M&rft.aulast=Kuznetsova&rft.aufirst=M&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - MISR Satellite Observations of Environmental Factors Affecting Human Health in California, from the San Joaquin Valley to the Salton Sea T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615922; 6282173 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Garay, Michael AU - Kalashnikova, O Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - USA, California, San Joaquin Valley KW - Remote sensing KW - USA, California KW - Environmental factors KW - Valleys KW - Satellites KW - Public health KW - USA, California, Salton Sea UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615922?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=MISR+Satellite+Observations+of+Environmental+Factors+Affecting+Human+Health+in+California%2C+from+the+San+Joaquin+Valley+to+the+Salton+Sea&rft.au=Garay%2C+Michael%3BKalashnikova%2C+O&rft.aulast=Garay&rft.aufirst=Michael&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - NASA Earth Observation Systems and Applications for Health: Moving from Research to Operational End Users T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615905; 6282171 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Haynes, John AU - Estes, S Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Meteorology KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615905?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=NASA+Earth+Observation+Systems+and+Applications+for+Health%3A+Moving+from+Research+to+Operational+End+Users&rft.au=Haynes%2C+John%3BEstes%2C+S&rft.aulast=Haynes&rft.aufirst=John&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Lessons Learned in Transitioning Research to Operations: Applications to Space Weather T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615762; 6282329 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Jedlovec, Gary Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Weather UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615762?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Lessons+Learned+in+Transitioning+Research+to+Operations%3A+Applications+to+Space+Weather&rft.au=Jedlovec%2C+Gary&rft.aulast=Jedlovec&rft.aufirst=Gary&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Impact of Aerosols on Convective Clouds and Precipitation T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615706; 6282305 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Tao, Wei-Kuo AU - Li, X. AU - Wu, D. AU - Shi, J Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Clouds KW - Aerosols KW - Precipitation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615706?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Impact+of+Aerosols+on+Convective+Clouds+and+Precipitation&rft.au=Tao%2C+Wei-Kuo%3BLi%2C+X.%3BWu%2C+D.%3BShi%2C+J&rft.aulast=Tao&rft.aufirst=Wei-Kuo&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Integration of the total lightning jump algorithm into current operational warning environment conceptual models T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615546; 6282254 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Schultz, Christopher AU - Carey, L AU - Schultz, E AU - Stano, G AU - Blakeslee, R AU - Goodman, S Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Integration KW - Mathematical models KW - Lightning KW - Algorithms KW - Electricity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615546?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Integration+of+the+total+lightning+jump+algorithm+into+current+operational+warning+environment+conceptual+models&rft.au=Schultz%2C+Christopher%3BCarey%2C+L%3BSchultz%2C+E%3BStano%2C+G%3BBlakeslee%2C+R%3BGoodman%2C+S&rft.aulast=Schultz&rft.aufirst=Christopher&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Characterizing the Impact of Hyperspectral Infrared Radiances near Clouds on Global Atmospheric Analysis T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615338; 6282992 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - McCarty, Will Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Clouds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615338?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Characterizing+the+Impact+of+Hyperspectral+Infrared+Radiances+near+Clouds+on+Global+Atmospheric+Analysis&rft.au=McCarty%2C+Will&rft.aulast=McCarty&rft.aufirst=Will&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Effect of ENSO on Clouds and Cloud Radiative Effects in CMIP5 Models T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615333; 6282891 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Wang, Hailan AU - Su, W. Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Clouds KW - Models KW - El Nino phenomena KW - Southern Oscillation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615333?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Effect+of+ENSO+on+Clouds+and+Cloud+Radiative+Effects+in+CMIP5+Models&rft.au=Wang%2C+Hailan%3BSu%2C+W.&rft.aulast=Wang&rft.aufirst=Hailan&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Genesis of Hurricane Sandy (2012) Simulated with a Global Mesoscale Model T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615186; 6283104 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Shen, Bo-Wen AU - DeMaria, M AU - Li, J. AU - Cheung, S Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Hurricanes KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615186?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Genesis+of+Hurricane+Sandy+%282012%29+Simulated+with+a+Global+Mesoscale+Model&rft.au=Shen%2C+Bo-Wen%3BDeMaria%2C+M%3BLi%2C+J.%3BCheung%2C+S&rft.aulast=Shen&rft.aufirst=Bo-Wen&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - The Role of Calibration in Large-Scale Averages Computed from Multi-satellite Precipitation Datasets T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615093; 6282870 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Huffman, George AU - Bolvin, D AU - Nelkin, E Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Precipitation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615093?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=The+Role+of+Calibration+in+Large-Scale+Averages+Computed+from+Multi-satellite+Precipitation+Datasets&rft.au=Huffman%2C+George%3BBolvin%2C+D%3BNelkin%2C+E&rft.aulast=Huffman&rft.aufirst=George&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Infusing NASA satellite data to model air-quality for Southeast United States: A wildfire, aerosol transport, and respiratory health case study T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518615063; 6282908 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Kc, Binita Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Aerosols KW - Data processing KW - Wildfire KW - Case studies KW - Respiration KW - Remote sensing KW - Air quality KW - USA, Southeast KW - Satellites KW - Metabolism KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615063?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Infusing+NASA+satellite+data+to+model+air-quality+for+Southeast+United+States%3A+A+wildfire%2C+aerosol+transport%2C+and+respiratory+health+case+study&rft.au=Kc%2C+Binita&rft.aulast=Kc&rft.aufirst=Binita&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Preparing to assimilate current and future land surface products at GMAO, AFWA, NCEP, and NRL using a common data assimilation infrastructure T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518614951; 6282924 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Peters-Lidard, Christa Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Infrastructure KW - Data collection KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518614951?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Preparing+to+assimilate+current+and+future+land+surface+products+at+GMAO%2C+AFWA%2C+NCEP%2C+and+NRL+using+a+common+data+assimilation+infrastructure&rft.au=Peters-Lidard%2C+Christa&rft.aulast=Peters-Lidard&rft.aufirst=Christa&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Does the tropical circulation strengthened or weakened due to global warming? T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518614946; 6282893 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Lau, William AU - Kim, K Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Climatic changes KW - Global warming KW - Greenhouse gases UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518614946?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Does+the+tropical+circulation+strengthened+or+weakened+due+to+global+warming%3F&rft.au=Lau%2C+William%3BKim%2C+K&rft.aulast=Lau&rft.aufirst=William&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - The Radiation, Interplanetary Shocks, and Coronal Sources (RISCS) Toolset T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518614733; 6281947 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Spann, James AU - Zank, G Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Shock KW - Radiation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518614733?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=The+Radiation%2C+Interplanetary+Shocks%2C+and+Coronal+Sources+%28RISCS%29+Toolset&rft.au=Spann%2C+James%3BZank%2C+G&rft.aulast=Spann&rft.aufirst=James&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Preparing for GPM: Inclusion of linearized moist physics in NASA's Data Assimilation Tools T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518614003; 6282927 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Holdaway, Daniel Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Data collection KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518614003?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Preparing+for+GPM%3A+Inclusion+of+linearized+moist+physics+in+NASA%27s+Data+Assimilation+Tools&rft.au=Holdaway%2C+Daniel&rft.aulast=Holdaway&rft.aufirst=Daniel&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Multi-satellite aerosol observations in the vicinity of clouds T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613942; 6283088 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Marshak, Alexander AU - Varnai, T an AU - Wen, G Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Clouds KW - Aerosols UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613942?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Multi-satellite+aerosol+observations+in+the+vicinity+of+clouds&rft.au=Marshak%2C+Alexander%3BVarnai%2C+T+an%3BWen%2C+G&rft.aulast=Marshak&rft.aufirst=Alexander&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - SPoRT transition of JPSS VIIRS Imagery for Night-time Applications T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613714; 6283100 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Stano, Geoffrey Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Sports UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613714?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=SPoRT+transition+of+JPSS+VIIRS+Imagery+for+Night-time+Applications&rft.au=Stano%2C+Geoffrey&rft.aulast=Stano&rft.aufirst=Geoffrey&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Real-time Volcanic Cloud Products for Aviation Alerts T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613687; 6281885 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Krotkov, Nickolay AU - Habib, S AU - Brentzel, K AU - Coronado, P AU - Seftor, C AU - Linda, M AU - Li, J. AU - Heinrichs, T AU - Cable, J AU - Macfarlane, S AU - Schneider, D AU - Hassinen, S AU - Yang, K AU - Hughes, E Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Clouds KW - Volcanoes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613687?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Real-time+Volcanic+Cloud+Products+for+Aviation+Alerts&rft.au=Krotkov%2C+Nickolay%3BHabib%2C+S%3BBrentzel%2C+K%3BCoronado%2C+P%3BSeftor%2C+C%3BLinda%2C+M%3BLi%2C+J.%3BHeinrichs%2C+T%3BCable%2C+J%3BMacfarlane%2C+S%3BSchneider%2C+D%3BHassinen%2C+S%3BYang%2C+K%3BHughes%2C+E&rft.aulast=Krotkov&rft.aufirst=Nickolay&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Enhancing Floodplain Management in the Lower Mekong River Basin Using Vegetation and Water Cycle Satellite Observations T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613670; 6282145 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Bolten, John Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Flood plains KW - Water management KW - Asia, Mekong R. basin KW - Remote sensing KW - Vegetation KW - Hydrologic cycle KW - Satellites KW - River basin management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613670?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Enhancing+Floodplain+Management+in+the+Lower+Mekong+River+Basin+Using+Vegetation+and+Water+Cycle+Satellite+Observations&rft.au=Bolten%2C+John&rft.aulast=Bolten&rft.aufirst=John&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Analyzing methane emissions from the San Joaquin Valley, California using combined airborne and tower measurements T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613650; 6282114 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Yates, Emma Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Methane KW - USA, California, San Joaquin Valley KW - Emissions KW - Emission measurements KW - USA, California KW - Valleys UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613650?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Analyzing+methane+emissions+from+the+San+Joaquin+Valley%2C+California+using+combined+airborne+and+tower+measurements&rft.au=Yates%2C+Emma&rft.aulast=Yates&rft.aufirst=Emma&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Climate drift induced by the introduction of dynamic vegetation phenology T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613647; 6281981 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Koster, Randal AU - Walker, G Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Phenology KW - Drift KW - Climate KW - Vegetation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613647?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Climate+drift+induced+by+the+introduction+of+dynamic+vegetation+phenology&rft.au=Koster%2C+Randal%3BWalker%2C+G&rft.aulast=Koster&rft.aufirst=Randal&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Observation Impacts for Longer Forecast Lead-Times T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613621; 6281648 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Gelaro, Ronald AU - Mahajan, R AU - Todling, R Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Meteorology KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613621?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Observation+Impacts+for+Longer+Forecast+Lead-Times&rft.au=Gelaro%2C+Ronald%3BMahajan%2C+R%3BTodling%2C+R&rft.aulast=Gelaro&rft.aufirst=Ronald&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Lightning Tracking Tool for Assessment of Total Cloud Lightning within AWIPS II T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613595; 6281975 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Burks, Jason AU - Stano, G AU - Sperow, K Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Clouds KW - Lightning KW - Electricity KW - Tracking UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613595?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Lightning+Tracking+Tool+for+Assessment+of+Total+Cloud+Lightning+within+AWIPS+II&rft.au=Burks%2C+Jason%3BStano%2C+G%3BSperow%2C+K&rft.aulast=Burks&rft.aufirst=Jason&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Use of an OSSE to evaluate background error covariances estimated by the "NMC method" T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613573; 6281840 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Errico, Ronald AU - Prive, N AU - Gu, W. Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Meteorology KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613573?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Use+of+an+OSSE+to+evaluate+background+error+covariances+estimated+by+the+%22NMC+method%22&rft.au=Errico%2C+Ronald%3BPrive%2C+N%3BGu%2C+W.&rft.aulast=Errico&rft.aufirst=Ronald&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Real-time Global Flood Monitoring and Forecasting using an Enhanced Land Surface Model with Satellite and NWP model based Precipitation T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613558; 6282045 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Wu, Huan AU - Adler, R AU - Tian, Y Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Prediction KW - Floods KW - Remote sensing KW - Precipitation KW - Satellites KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613558?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Real-time+Global+Flood+Monitoring+and+Forecasting+using+an+Enhanced+Land+Surface+Model+with+Satellite+and+NWP+model+based+Precipitation&rft.au=Wu%2C+Huan%3BAdler%2C+R%3BTian%2C+Y&rft.aulast=Wu&rft.aufirst=Huan&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - High-Resolution Vertical Profiles of NO2 in the Lower Troposphere During DISCOVER-AQ: Using Measured Profile Shapes to Improve OMI NO2 Retrievals and Better Understand Models T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613520; 6282112 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Stein Zweers, Deborah Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Troposphere KW - Models KW - Vertical profiles UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613520?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=High-Resolution+Vertical+Profiles+of+NO2+in+the+Lower+Troposphere+During+DISCOVER-AQ%3A+Using+Measured+Profile+Shapes+to+Improve+OMI+NO2+Retrievals+and+Better+Understand+Models&rft.au=Stein+Zweers%2C+Deborah&rft.aulast=Stein+Zweers&rft.aufirst=Deborah&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Impact of diurnal cycle simulation on mean state and interannual variability in a CMIP5 model: CanAM4 T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613514; 6281905 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Taylor, Patrick AU - Cole, J Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Diurnal variations KW - Simulation KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613514?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Impact+of+diurnal+cycle+simulation+on+mean+state+and+interannual+variability+in+a+CMIP5+model%3A+CanAM4&rft.au=Taylor%2C+Patrick%3BCole%2C+J&rft.aulast=Taylor&rft.aufirst=Patrick&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Estimate of Radiation Exposure to Commercial Air Travelers and Avionic Systems During an Extreme Space Weather Event T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613476; 6281830 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Mertens, Christopher AU - Xu, X. AU - Kress, B AU - Tobiska, W Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Air exposure KW - Weather KW - Radiation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613476?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Estimate+of+Radiation+Exposure+to+Commercial+Air+Travelers+and+Avionic+Systems+During+an+Extreme+Space+Weather+Event&rft.au=Mertens%2C+Christopher%3BXu%2C+X.%3BKress%2C+B%3BTobiska%2C+W&rft.aulast=Mertens&rft.aufirst=Christopher&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Food Price Seasonality and Drought in Developing Countries T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613431; 6281944 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Brown, Molly AU - Adhikari, P AU - Lukyanenko, P AU - de Beurs, K Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Food KW - Developing countries KW - Droughts KW - Seasonal variations UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613431?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Food+Price+Seasonality+and+Drought+in+Developing+Countries&rft.au=Brown%2C+Molly%3BAdhikari%2C+P%3BLukyanenko%2C+P%3Bde+Beurs%2C+K&rft.aulast=Brown&rft.aufirst=Molly&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Assimilation of SMOS Brightness Temperature to Improve Surface and Root-Zone Soil Moisture T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613388; 6281989 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - De Lannoy, Gabrielle AU - Reichle, R AU - Liu, Q Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Brightness KW - Temperature KW - Soil temperature KW - Soil moisture KW - Surface radiation temperature UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613388?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Assimilation+of+SMOS+Brightness+Temperature+to+Improve+Surface+and+Root-Zone+Soil+Moisture&rft.au=De+Lannoy%2C+Gabrielle%3BReichle%2C+R%3BLiu%2C+Q&rft.aulast=De+Lannoy&rft.aufirst=Gabrielle&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Taking Extreme Space Weather to the Extreme T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613310; 6281829 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Pesnell, W Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Weather UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613310?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Taking+Extreme+Space+Weather+to+the+Extreme&rft.au=Pesnell%2C+W&rft.aulast=Pesnell&rft.aufirst=W&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Information-Based Analysis of Data Assimilation T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613257; 6281990 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Nearing, Grey AU - Gupta, H AU - Crow, W AU - Gong, W Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Data collection KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613257?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Information-Based+Analysis+of+Data+Assimilation&rft.au=Nearing%2C+Grey%3BGupta%2C+H%3BCrow%2C+W%3BGong%2C+W&rft.aulast=Nearing&rft.aufirst=Grey&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - How Heliophysics Scientific Research Missions Support Space Weather Prediction T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613116; 6281673 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Chenette, David Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Prediction KW - Weather forecasting UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613116?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=How+Heliophysics+Scientific+Research+Missions+Support+Space+Weather+Prediction&rft.au=Chenette%2C+David&rft.aulast=Chenette&rft.aufirst=David&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Observations of Equatorial Pacific Planetary Boundary Layer Wind Shear During February 2000-November 2009 T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613101; 6281957 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Halpern, David AU - Garay, M AU - Mueller, K Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Wind shear KW - Boundary layers KW - Equatorial Pacific UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613101?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Observations+of+Equatorial+Pacific+Planetary+Boundary+Layer+Wind+Shear+During+February+2000-November+2009&rft.au=Halpern%2C+David%3BGaray%2C+M%3BMueller%2C+K&rft.aulast=Halpern&rft.aufirst=David&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Applied Remote Sensing Training (ARSET) Program: Building Capacity for Water Resources and Flood Monitoring using NASA Earth Science T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613095; 6282143 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Mehta, Amita AU - Prados, A Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Floods KW - Training KW - Remote sensing KW - Water resources KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613095?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Applied+Remote+Sensing+Training+%28ARSET%29+Program%3A+Building+Capacity+for+Water+Resources+and+Flood+Monitoring+using+NASA+Earth+Science&rft.au=Mehta%2C+Amita%3BPrados%2C+A&rft.aulast=Mehta&rft.aufirst=Amita&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Use of machine learning techniques for identification of robust teleconnections to East African rainfall variability in observations and models T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613087; 6281915 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Roberts, J AU - Robertson, F AU - Funk, C Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Rainfall KW - Africa KW - Learning algorithms KW - Models KW - Teleconnections UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613087?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Use+of+machine+learning+techniques+for+identification+of+robust+teleconnections+to+East+African+rainfall+variability+in+observations+and+models&rft.au=Roberts%2C+J%3BRobertson%2C+F%3BFunk%2C+C&rft.aulast=Roberts&rft.aufirst=J&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - The Use of NASA's Modern Era Retrospective-analysis for Research and Applications (MERRA) Data For Assessment of Building Climate Zone Change and Variability Over the Last 30 Years T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518613085; 6281738 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Stackhouse Jr, Paul Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Data processing KW - Climatic changes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518613085?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=The+Use+of+NASA%27s+Modern+Era+Retrospective-analysis+for+Research+and+Applications+%28MERRA%29+Data+For+Assessment+of+Building+Climate+Zone+Change+and+Variability+Over+the+Last+30+Years&rft.au=Stackhouse+Jr%2C+Paul&rft.aulast=Stackhouse+Jr&rft.aufirst=Paul&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Impacts of dust and black carbon on accelerated melting of seasonal snowpack over the Himalayas--Causes and Consequences T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518611836; 6281768 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Lau, William Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Melting KW - Sulfur dioxide KW - Black carbon KW - black carbon KW - Seasonal variations KW - Dust UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518611836?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Impacts+of+dust+and+black+carbon+on+accelerated+melting+of+seasonal+snowpack+over+the+Himalayas--Causes+and+Consequences&rft.au=Lau%2C+William&rft.aulast=Lau&rft.aufirst=William&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Monitoring and Forecasting Floods over North Africa based on Satellite data: Uncertainties and Challenges T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518611805; 6281858 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Thengumthara, Kunhikrishnan Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Prediction KW - Data processing KW - Floods KW - Remote sensing KW - Africa KW - Satellites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518611805?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Monitoring+and+Forecasting+Floods+over+North+Africa+based+on+Satellite+data%3A+Uncertainties+and+Challenges&rft.au=Thengumthara%2C+Kunhikrishnan&rft.aulast=Thengumthara&rft.aufirst=Kunhikrishnan&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Impact of Very Large Solar Particle Events on the Mesosphere and Stratosphere T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518611765; 6282072 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Jackman, Charles Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Particulates KW - Stratosphere UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518611765?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Impact+of+Very+Large+Solar+Particle+Events+on+the+Mesosphere+and+Stratosphere&rft.au=Jackman%2C+Charles&rft.aulast=Jackman&rft.aufirst=Charles&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Simulation and Analysis of GOES-R Geostationary Lightning Mapper Detection Algorithm Performance T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610713; 6282687 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Clark, Loren Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Mathematical models KW - Lightning KW - Algorithms KW - Simulation KW - Electricity KW - Mapping UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610713?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Simulation+and+Analysis+of+GOES-R+Geostationary+Lightning+Mapper+Detection+Algorithm+Performance&rft.au=Clark%2C+Loren&rft.aulast=Clark&rft.aufirst=Loren&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Causes of extreme dry conditions over the western United States during early 2013 T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610634; 6282499 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Wang, Hailan AU - Schubert, S Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - USA KW - Meteorology KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610634?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Causes+of+extreme+dry+conditions+over+the+western+United+States+during+early+2013&rft.au=Wang%2C+Hailan%3BSchubert%2C+S&rft.aulast=Wang&rft.aufirst=Hailan&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Elusive Elements of Evaporation and Runoff Behavior Hidden Within Traditional Hydrological Measurements T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610626; 6282645 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Koster, Randal Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Evaporation KW - Runoff UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610626?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Elusive+Elements+of+Evaporation+and+Runoff+Behavior+Hidden+Within+Traditional+Hydrological+Measurements&rft.au=Koster%2C+Randal&rft.aulast=Koster&rft.aufirst=Randal&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Applications of Satellite Remote Sensing for Response to and Recovery from Meteorological Disasters T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610609; 6282702 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Molthan, Andrew Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Disasters KW - Remote sensing KW - Meteorology KW - Satellites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610609?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Applications+of+Satellite+Remote+Sensing+for+Response+to+and+Recovery+from+Meteorological+Disasters&rft.au=Molthan%2C+Andrew&rft.aulast=Molthan&rft.aufirst=Andrew&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Development of Super Ensemble-based Aviation Turbulence Information and Guidance (SEATIG) and its Application to the Advanced Air Traffic Management (ATM) T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610596; 6282748 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Kim, Jung-Hoon AU - Chan, W AU - Sridhar, B AU - Sharman, R Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Traffic management KW - Air traffic control KW - Turbulence UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610596?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Development+of+Super+Ensemble-based+Aviation+Turbulence+Information+and+Guidance+%28SEATIG%29+and+its+Application+to+the+Advanced+Air+Traffic+Management+%28ATM%29&rft.au=Kim%2C+Jung-Hoon%3BChan%2C+W%3BSridhar%2C+B%3BSharman%2C+R&rft.aulast=Kim&rft.aufirst=Jung-Hoon&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Information-Theoretic Perspective on Benchmarking with Inductive Models T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610332; 6282349 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Nearing, Grey AU - Gupta, H Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610332?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Information-Theoretic+Perspective+on+Benchmarking+with+Inductive+Models&rft.au=Nearing%2C+Grey%3BGupta%2C+H&rft.aulast=Nearing&rft.aufirst=Grey&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Benchmarking the next phase of the North American Land Data Assimilation System (NLDAS) using the Land Verification Toolkit (LVT) T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610326; 6282347 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Mocko, David AU - Peters-Lidard, C AU - Kumar, S AU - Xia, Y AU - Ek, M. AU - Dong, J Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - North America KW - Data collection KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610326?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Benchmarking+the+next+phase+of+the+North+American+Land+Data+Assimilation+System+%28NLDAS%29+using+the+Land+Verification+Toolkit+%28LVT%29&rft.au=Mocko%2C+David%3BPeters-Lidard%2C+C%3BKumar%2C+S%3BXia%2C+Y%3BEk%2C+M.%3BDong%2C+J&rft.aulast=Mocko&rft.aufirst=David&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Impact of the Assimilation of Hyperspectral Infrared Retrieved Profiles on Advanced Weather and Research Model Simulations of a Non-Convective Wind Event T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610279; 6282588 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Berndt, Emily AU - Zavodsky, B AU - Jedlovec, G Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Simulation KW - Weather forecasting KW - Wind KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610279?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Impact+of+the+Assimilation+of+Hyperspectral+Infrared+Retrieved+Profiles+on+Advanced+Weather+and+Research+Model+Simulations+of+a+Non-Convective+Wind+Event&rft.au=Berndt%2C+Emily%3BZavodsky%2C+B%3BJedlovec%2C+G&rft.aulast=Berndt&rft.aufirst=Emily&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Hurricane Imaging Radiometer (HIRAD) T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610210; 6282590 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Cecil, Daniel Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Radiometers KW - Hurricanes KW - Imaging techniques UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610210?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Hurricane+Imaging+Radiometer+%28HIRAD%29&rft.au=Cecil%2C+Daniel&rft.aulast=Cecil&rft.aufirst=Daniel&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Impact of NASA EOS instrument data on the scientific literature: 10 years of published research results from Terra, Aqua, and Aura T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610208; 6282635 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Major, Gene Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610208?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Impact+of+NASA+EOS+instrument+data+on+the+scientific+literature%3A+10+years+of+published+research+results+from+Terra%2C+Aqua%2C+and+Aura&rft.au=Major%2C+Gene&rft.aulast=Major&rft.aufirst=Gene&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Ensemble Kalman Assimilation of Global-Hawk-based Data from Tropical Cyclones T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610197; 6282589 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Sippel, Jason AU - Zhang, F AU - Weng, Y AU - Heymsfield, G AU - Tian, L AU - Braun, S Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Cyclones KW - Hurricanes KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610197?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Ensemble+Kalman+Assimilation+of+Global-Hawk-based+Data+from+Tropical+Cyclones&rft.au=Sippel%2C+Jason%3BZhang%2C+F%3BWeng%2C+Y%3BHeymsfield%2C+G%3BTian%2C+L%3BBraun%2C+S&rft.aulast=Sippel&rft.aufirst=Jason&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - ICESat-2 Mission Applications: Improving Science Application Tools and Research T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610179; 6282667 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Escobar, Vanessa Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Meteorology KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610179?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=ICESat-2+Mission+Applications%3A+Improving+Science+Application+Tools+and+Research&rft.au=Escobar%2C+Vanessa&rft.aulast=Escobar&rft.aufirst=Vanessa&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - The Transition of Atmospheric Infrared Sounder Total Ozone Products to Operations T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610074; 6282658 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Berndt, Emily AU - Zavodsky, B AU - Jedlovec, G Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Ozone UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610074?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=The+Transition+of+Atmospheric+Infrared+Sounder+Total+Ozone+Products+to+Operations&rft.au=Berndt%2C+Emily%3BZavodsky%2C+B%3BJedlovec%2C+G&rft.aulast=Berndt&rft.aufirst=Emily&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Quantifying the regional and global tropospheric ozone variability driven by ENSO using the GEOS-5 Ozone Assimilation T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518610054; 6282419 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Olsen, Mark Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Troposphere KW - El Nino phenomena KW - Southern Oscillation KW - Ozone UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518610054?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Quantifying+the+regional+and+global+tropospheric+ozone+variability+driven+by+ENSO+using+the+GEOS-5+Ozone+Assimilation&rft.au=Olsen%2C+Mark&rft.aulast=Olsen&rft.aufirst=Mark&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Development of web mapping service capabilities to support NASA disasters applications/app development T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518609986; 6282703 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Burks, Jason AU - Molthan, A AU - McGrath, K Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - Disasters KW - Mapping UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518609986?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Development+of+web+mapping+service+capabilities+to+support+NASA+disasters+applications%2Fapp+development&rft.au=Burks%2C+Jason%3BMolthan%2C+A%3BMcGrath%2C+K&rft.aulast=Burks&rft.aufirst=Jason&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - CMAQ Simulation of the January-February 2013 DISCOVER-AQ Field Campaign Period in the San Joaquin Valley of California and Comparison with Observations T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518609981; 6282545 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Pickering, Kenneth Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - USA, California, San Joaquin Valley KW - Simulation KW - USA, California KW - Valleys UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518609981?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=CMAQ+Simulation+of+the+January-February+2013+DISCOVER-AQ+Field+Campaign+Period+in+the+San+Joaquin+Valley+of+California+and+Comparison+with+Observations&rft.au=Pickering%2C+Kenneth&rft.aulast=Pickering&rft.aufirst=Kenneth&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - A WRF-Chem flash rate parameterization scheme and LNOx analysis of the 29-30 May 2012 convective event in Oklahoma during DC3 T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518609869; 6282547 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Cummings, Kristin Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - USA, Oklahoma KW - Meteorology KW - Earth sciences UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518609869?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=A+WRF-Chem+flash+rate+parameterization+scheme+and+LNOx+analysis+of+the+29-30+May+2012+convective+event+in+Oklahoma+during+DC3&rft.au=Cummings%2C+Kristin&rft.aulast=Cummings&rft.aufirst=Kristin&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - CPAPER T1 - Colorado Lightning Mapping Array Collaborations through the GOES-R Visiting Scientist Program T2 - 94th American Meteorological Society Annual Meeting (AMS 2014) AN - 1518608873; 6282688 JF - 94th American Meteorological Society Annual Meeting (AMS 2014) AU - Stano, Geoffrey AU - Szoke, E AU - Rydell, N AU - Cox, R AU - Mazur, R Y1 - 2014/02/02/ PY - 2014 DA - 2014 Feb 02 KW - USA, Colorado KW - Lightning KW - Electricity KW - Mapping UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518608873?accountid=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=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.atitle=Colorado+Lightning+Mapping+Array+Collaborations+through+the+GOES-R+Visiting+Scientist+Program&rft.au=Stano%2C+Geoffrey%3BSzoke%2C+E%3BRydell%2C+N%3BCox%2C+R%3BMazur%2C+R&rft.aulast=Stano&rft.aufirst=Geoffrey&rft.date=2014-02-02&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=94th+American+Meteorological+Society+Annual+Meeting+%28AMS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/94Annual/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - JOUR T1 - Masses, radii, and orbits of small Kepler planets; the transition from gaseous to rocky planets AN - 1832669366; 691134-6 AB - We report on the masses, sizes, and orbits of the planets orbiting 22 Kepler stars. There are 49 planet candidates around these stars, including 42 detected through transits and 7 revealed by precise Doppler measurements of the host stars. Based on an analysis of the Kepler brightness measurements, along with high-resolution imaging and spectroscopy, Doppler spectroscopy, and (for 11 stars) asteroseismology, we establish low false-positive probabilities (FPPs) for all of the transiting planets (41 of 42 have an FPP under 1%), and we constrain their sizes and masses. Most of the transiting planets are smaller than three times the size of Earth. For 16 planets, the Doppler signal was securely detected, providing a direct measurement of the planet's mass. For the other 26 planets we provide either marginal mass measurements or upper limits to their masses and densities; in many cases we can rule out a rocky composition. We identify six planets with densities above 5 g cm (super -3) , suggesting a mostly rocky interior for them. Indeed, the only planets that are compatible with a purely rocky composition are smaller than ~2 R (sub ⊕) . Larger planets evidently contain a larger fraction of low-density material (H, He, and H (sub 2) O). Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal. Supplement Series AU - Marcy, Geoffrey W AU - Isaacson, Howard AU - Howard, Andrew W AU - Rowe, Jason F AU - Jenkins, Jon M AU - Bryson, Stephen T AU - Latham, David W AU - Howell, Steve B AU - Gautier, Thomas N AU - Batalha, Natalie M AU - Rogers, Leslie AU - Ciardi, David AU - Fischer, Debra A AU - Gilliland, Ronald L AU - Kjeldsen, Hans AU - Christensen-Dalsgaard, Jorgen AU - Huber, Daniel AU - Chaplin, William J AU - Basu, Sarbani AU - Buchhave, Lars A AU - Quinn, Samuel N AU - Borucki, William J AU - Koch, David G AU - Hunter, Roger AU - Caldwell, Douglas A AU - Van Cleve, Jeffrey AU - Kolbl, Rea AU - Weiss, Lauren M AU - Petigura, Erik AU - Seager, Sara AU - Morton, Timothy AU - Johnson, John Asher AU - Ballard, Sarah AU - Burke, Chris AU - Cochran, William D AU - Endl, Michael AU - MacQueen, Phillip AU - Everett, Mark E AU - Lissauer, Jack J AU - Ford, Eric B AU - Torres, Guillermo AU - Fressin, Francois AU - Brown, Timothy M AU - Steffen, Jason H AU - Charbonneau, David AU - Basri, Gibor S AU - Sasselov, Dimitar D AU - Winn, Joshua AU - Sanchis-Ojeda, Roberto AU - Christiansen, Jessie AU - Adams, Elisabeth AU - Henze, Christopher AU - Dupree, Andrea AU - Fabrycky, Daniel C AU - Fortney, Jonathan J AU - Tarter, Jill AU - Holman, Matthew J AU - Tenenbaum, Peter AU - Shporer, Avi AU - Lucas, Philip W AU - Welsh, William F AU - Orosz, Jerome A AU - Bedding, T R AU - Campante, T L AU - Davies, G R AU - Elsworth, Y AU - Handberg, R AU - Hekker, S AU - Karoff, C AU - Kawaler, S D AU - Lund, M N AU - Lundkvist, M AU - Metcalfe, T S AU - Miglio, A AU - Aguirre, V Silva AU - Stello, D AU - White, T R AU - Boss, Alan AU - Devore, Edna AU - Gould, Alan AU - Prsa, Andrej AU - Agol, Eric AU - Barclay, Thomas AU - Coughlin, Jeff AU - Brugamyer, Erik AU - Mullally, Fergal AU - Quintana, Elisa V AU - Still, Martin AU - Thompson, Susan E AU - Morrison, David AU - Twicken, Joseph D AU - Desert, Jean-Michel AU - Carter, Josh AU - Crepp, Justin R AU - Hebrard, Guillaume AU - Santerne, Alexandre AU - Moutou, Claire AU - Sobeck, Charlie AU - Hudgins, Douglas AU - Haas, Michael R AU - Robertson, Paul AU - Lillo-Box, Jorge AU - Barrado, David Y1 - 2014/02/01/ PY - 2014 DA - 2014 Feb 01 EP - Paper no. 20 PB - University of Chicago Press for the American Astronomical Society, Chicago, IL VL - 210 IS - 2 SN - 0067-0049, 0067-0049 KW - extrasolar planets KW - density KW - orbits KW - gaseous planets KW - size KW - mass KW - brightness KW - planets KW - photometry KW - detection KW - transiting planets KW - planetary interiors KW - rocky planets KW - radius KW - planetary systems KW - Kepler Mission KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832669366?accountid=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.+Supplement+Series&rft.atitle=Masses%2C+radii%2C+and+orbits+of+small+Kepler+planets%3B+the+transition+from+gaseous+to+rocky+planets&rft.au=Marcy%2C+Geoffrey+W%3BIsaacson%2C+Howard%3BHoward%2C+Andrew+W%3BRowe%2C+Jason+F%3BJenkins%2C+Jon+M%3BBryson%2C+Stephen+T%3BLatham%2C+David+W%3BHowell%2C+Steve+B%3BGautier%2C+Thomas+N%3BBatalha%2C+Natalie+M%3BRogers%2C+Leslie%3BCiardi%2C+David%3BFischer%2C+Debra+A%3BGilliland%2C+Ronald+L%3BKjeldsen%2C+Hans%3BChristensen-Dalsgaard%2C+Jorgen%3BHuber%2C+Daniel%3BChaplin%2C+William+J%3BBasu%2C+Sarbani%3BBuchhave%2C+Lars+A%3BQuinn%2C+Samuel+N%3BBorucki%2C+William+J%3BKoch%2C+David+G%3BHunter%2C+Roger%3BCaldwell%2C+Douglas+A%3BVan+Cleve%2C+Jeffrey%3BKolbl%2C+Rea%3BWeiss%2C+Lauren+M%3BPetigura%2C+Erik%3BSeager%2C+Sara%3BMorton%2C+Timothy%3BJohnson%2C+John+Asher%3BBallard%2C+Sarah%3BBurke%2C+Chris%3BCochran%2C+William+D%3BEndl%2C+Michael%3BMacQueen%2C+Phillip%3BEverett%2C+Mark+E%3BLissauer%2C+Jack+J%3BFord%2C+Eric+B%3BTorres%2C+Guillermo%3BFressin%2C+Francois%3BBrown%2C+Timothy+M%3BSteffen%2C+Jason+H%3BCharbonneau%2C+David%3BBasri%2C+Gibor+S%3BSasselov%2C+Dimitar+D%3BWinn%2C+Joshua%3BSanchis-Ojeda%2C+Roberto%3BChristiansen%2C+Jessie%3BAdams%2C+Elisabeth%3BHenze%2C+Christopher%3BDupree%2C+Andrea%3BFabrycky%2C+Daniel+C%3BFortney%2C+Jonathan+J%3BTarter%2C+Jill%3BHolman%2C+Matthew+J%3BTenenbaum%2C+Peter%3BShporer%2C+Avi%3BLucas%2C+Philip+W%3BWelsh%2C+William+F%3BOrosz%2C+Jerome+A%3BBedding%2C+T+R%3BCampante%2C+T+L%3BDavies%2C+G+R%3BElsworth%2C+Y%3BHandberg%2C+R%3BHekker%2C+S%3BKaroff%2C+C%3BKawaler%2C+S+D%3BLund%2C+M+N%3BLundkvist%2C+M%3BMetcalfe%2C+T+S%3BMiglio%2C+A%3BAguirre%2C+V+Silva%3BStello%2C+D%3BWhite%2C+T+R%3BBoss%2C+Alan%3BDevore%2C+Edna%3BGould%2C+Alan%3BPrsa%2C+Andrej%3BAgol%2C+Eric%3BBarclay%2C+Thomas%3BCoughlin%2C+Jeff%3BBrugamyer%2C+Erik%3BMullally%2C+Fergal%3BQuintana%2C+Elisa+V%3BStill%2C+Martin%3BThompson%2C+Susan+E%3BMorrison%2C+David%3BTwicken%2C+Joseph+D%3BDesert%2C+Jean-Michel%3BCarter%2C+Josh%3BCrepp%2C+Justin+R%3BHebrard%2C+Guillaume%3BSanterne%2C+Alexandre%3BMoutou%2C+Claire%3BSobeck%2C+Charlie%3BHudgins%2C+Douglas%3BHaas%2C+Michael+R%3BRobertson%2C+Paul%3BLillo-Box%2C+Jorge%3BBarrado%2C+David&rft.aulast=Marcy&rft.aufirst=Geoffrey&rft.date=2014-02-01&rft.volume=210&rft.issue=2&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal.+Supplement+Series&rft.issn=00670049&rft_id=info:doi/10.1088%2F0067-0049%2F210%2F2%2F20 L2 - http://iopscience.iop.org/0067-0049/ 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 - 120 N1 - PubXState - IL N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - brightness; density; detection; extrasolar planets; gaseous planets; Kepler Mission; mass; orbits; photometry; planetary interiors; planetary systems; planets; radius; rocky planets; size; transiting planets DO - http://dx.doi.org/10.1088/0067-0049/210/2/20 ER - TY - JOUR T1 - GPS approach detecting tsunami energy scales in real-time for early warnings AN - 1807505319; 2016-063707 JF - Ocean Sciences Meeting AU - Song, Y Tony AU - Sharp, Jonathan AU - Briscoe, Mel AU - Itsweire, Eric Y1 - 2014/02// PY - 2014 DA - February 2014 EP - Abstract 13906 PB - American Geophysical Union (AGU), [varies] VL - 17 KW - tsunamis KW - Global Positioning System KW - Tohoku-Oki earthquake 2011 KW - technology KW - Far East KW - early warning systems KW - geologic hazards KW - Indian Ocean tsunami 2004 KW - Chile earthquake 2010 KW - magnitude KW - Chile KW - South America KW - Indian Ocean KW - warning systems KW - Nias earthquake 2005 KW - natural hazards KW - seismic energy KW - Asia KW - earthquakes KW - Japan KW - faults KW - energy KW - 19:Seismology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807505319?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=GPS+approach+detecting+tsunami+energy+scales+in+real-time+for+early+warnings&rft.au=Song%2C+Y+Tony%3BSharp%2C+Jonathan%3BBriscoe%2C+Mel%3BItsweire%2C+Eric&rft.aulast=Song&rft.aufirst=Y&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 - Asia; Chile; Chile earthquake 2010; early warning systems; earthquakes; energy; Far East; faults; geologic hazards; Global Positioning System; Indian Ocean; Indian Ocean tsunami 2004; Japan; magnitude; natural hazards; Nias earthquake 2005; seismic energy; South America; technology; Tohoku-Oki earthquake 2011; tsunamis; warning systems ER - TY - JOUR T1 - High-resolution simulations of Chesapeake and Delaware Bays under past and future climates AN - 1803777176; 2016-061197 JF - Ocean Sciences Meeting AU - Ross, A C AU - Li, M AU - Najjar, R G AU - Herrmann, Masha AU - Sharp, Jonathan AU - Briscoe, Mel AU - Itsweire, Eric Y1 - 2014/02// PY - 2014 DA - February 2014 EP - Abstract 14917 PB - American Geophysical Union (AGU), [varies] VL - 17 KW - United States KW - high-resolution methods KW - Chesapeake Bay KW - Quaternary KW - paleohydrology KW - paleo-oceanography KW - simulation KW - paleoclimatology KW - Holocene KW - time scales KW - models KW - Cenozoic KW - sea-level changes KW - evaporation KW - transgression KW - streamflow KW - runoff KW - Delaware Bay KW - upper Holocene KW - accuracy KW - Atlantic Coastal Plain KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803777176?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=High-resolution+simulations+of+Chesapeake+and+Delaware+Bays+under+past+and+future+climates&rft.au=Ross%2C+A+C%3BLi%2C+M%3BNajjar%2C+R+G%3BHerrmann%2C+Masha%3BSharp%2C+Jonathan%3BBriscoe%2C+Mel%3BItsweire%2C+Eric&rft.aulast=Ross&rft.aufirst=A&rft.date=2014-02-01&rft.volume=17&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Ocean+Sciences+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 2014 ocean sciences meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-07-14 N1 - CODEN - #07653 N1 - SubjectsTermNotLitGenreText - accuracy; Atlantic Coastal Plain; Cenozoic; Chesapeake Bay; Delaware Bay; evaporation; high-resolution methods; Holocene; models; paleo-oceanography; paleoclimatology; paleohydrology; Quaternary; runoff; sea-level changes; simulation; streamflow; time scales; transgression; United States; upper Holocene ER - TY - JOUR T1 - Preventing Tracking-Tube False Detections in Occupancy Modeling of Southeastern Beach Mouse AN - 1694975254; PQ0001620677 AB - Quantifying habitat occupancy of the southeastern beach mouse Peromyscus polionotus niveiventris is important for managing this threatened species throughout its limited range. Tracking tubes were used to detect the southeastern beach mouse in coastal areas on the federal lands of the Kennedy Space Center, Cape Canaveral Air Force Station, and Canaveral National Seashore. Because this method relied on observations of footprints, detections of beach mice were confounded by the cooccurrence of cotton mice Peromyscus gossypinus, which have wider but slightly overlapping footprint widths. Mice of both species were captured and footprinted using tracking tubes to collect a database of footprints of known identity. These data were used to develop a Bayesian hierarchical model of the cutoff width at which a print could be assigned as a beach mouse with a known probability of error. The proportion of vegetated habitat at a site had a negative influence on detection probability. No ecological covariates had a measurable influence on beach mouse occupancy, probably due to the limited range of environmental variation in the sampled region. JF - Journal of Fish and Wildlife Management AU - Stolen, Eric D AU - Oddy, Donna M AU - Legare, Mike L AU - Breininger, David R AU - Gann, Shanon L AU - Legare, Stephanie A AU - Weiss, Stephanie K AU - Holloway-Adkins, Karen G AU - Schaub, Ron AD - Ecological Programs, Mail Code:, IHA-300, Kennedy Space Center, Florida 32899, eric.d.stolen@nasa.gov PY - 2014 SP - 270 EP - 281 PB - U.S. Fish & Wildlife Service (Conservation Genetics Laboratory), 1011 E. Tudor Rd. Anchorage AK 99503 United States VL - 5 IS - 2 SN - 1944-687X, 1944-687X KW - Ecology Abstracts KW - Bayesian KW - hierarchical model KW - cotton mice KW - habitat occupancy KW - footprints KW - Peromyscus gossypinus KW - Databases KW - Beaches KW - Wildlife management KW - Mathematical models KW - Data processing KW - Cotton KW - Bayesian analysis KW - Habitat KW - Peromyscus polionotus niveiventris KW - D 04060:Management and Conservation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1694975254?accountid=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+Fish+and+Wildlife+Management&rft.atitle=Preventing+Tracking-Tube+False+Detections+in+Occupancy+Modeling+of+Southeastern+Beach+Mouse&rft.au=Stolen%2C+Eric+D%3BOddy%2C+Donna+M%3BLegare%2C+Mike+L%3BBreininger%2C+David+R%3BGann%2C+Shanon+L%3BLegare%2C+Stephanie+A%3BWeiss%2C+Stephanie+K%3BHolloway-Adkins%2C+Karen+G%3BSchaub%2C+Ron&rft.aulast=Stolen&rft.aufirst=Eric&rft.date=2014-02-01&rft.volume=5&rft.issue=2&rft.spage=270&rft.isbn=&rft.btitle=&rft.title=Journal+of+Fish+and+Wildlife+Management&rft.issn=1944687X&rft_id=info:doi/10.3996%2F032014JFWM025 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2016-01-21 N1 - SubjectsTermNotLitGenreText - Databases; Wildlife management; Beaches; Cotton; Data processing; Mathematical models; Bayesian analysis; Habitat; Peromyscus polionotus niveiventris; Peromyscus gossypinus DO - http://dx.doi.org/10.3996/032014JFWM025 ER - TY - JOUR T1 - NASA Satellite Sees Increase of India's Sulfur Dioxide Emissions AN - 1547852300; 20161385 AB - Power-plant emissions of sulfur dioxide (SO sub(2))-an atmospheric pollutant with both health and climate impacts- have increased across India in recent years, according to a new analysis of data from a NASA satellite. JF - Earth Observer AU - Hansen, Kathryn AD - NASA's Goddard Space Flight Center, Earth Science News Team, kathryn.h.hansen@nasa.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 39 EP - 40 PB - EOS Project Science Office, NASA Goddard Space Flight Center Greenbelt MD 20771 USA VL - 26 IS - 1 KW - Pollution Abstracts KW - Air pollution KW - Sulfur dioxide KW - Remote sensing KW - Emissions KW - Environmental impact KW - Satellites KW - India KW - P 0000:AIR POLLUTION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1547852300?accountid=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=Earth+Observer&rft.atitle=NASA+Satellite+Sees+Increase+of+India%27s+Sulfur+Dioxide+Emissions&rft.au=Hansen%2C+Kathryn&rft.aulast=Hansen&rft.aufirst=Kathryn&rft.date=2014-02-01&rft.volume=26&rft.issue=1&rft.spage=39&rft.isbn=&rft.btitle=&rft.title=Earth+Observer&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-07-01 N1 - Last updated - 2015-08-05 N1 - SubjectsTermNotLitGenreText - Air pollution; Sulfur dioxide; Environmental impact; Emissions; Remote sensing; Satellites; India ER - TY - JOUR T1 - Improved discrimination of volcanic complexes, tectonic features, and regolith properties in Mare Serenitatis from Earth-based radar mapping AN - 1542643510; 2014-046592 AB - Radar images at 70 cm wavelength show 4-5 dB variations in backscatter strength within regions of relatively uniform spectral reflectance properties in central and northern Mare Serenitatis, delineating features suggesting lava flow margins, channels, and superposition relationships. These backscatter differences are much less pronounced at 12.6 cm wavelength, consistent with a large component of the 70 cm echo arising from the rough or blocky transition zone between the mare regolith and the intact bedrock. Such deep probing is possible because the ilmenite content, which modulates microwave losses, of central Mare Serenitatis is generally low (2-3% by weight). Modeling of the radar returns from a buried interface shows that an average regolith thickness of 10 m could lead to the observed shifts in 70 cm echo power with a change in TiO (sub 2) content from 2% to 3%. This thickness is consistent with estimates of regolith depth (10-15 m) based on the smallest diameter for which fresh craters have obvious blocky ejecta. The 70 cm backscatter differences provide a view of mare flow-unit boundaries, channels, and lobes unseen by other remote sensing methods. A localized pyroclastic deposit associated with Rima Calippus is identified based on its low radar echo strength. Radar mapping also improves delineation of units for crater age dating and highlights a 250 km long, east-west trending feature in northern Mare Serenitatis that we suggest is a large graben flooded by late-stage mare flows. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Campbell, Bruce A AU - Hawke, B Ray AU - Morgan, Gareth A AU - Carter, Lynn M AU - Campbell, Donald B AU - Nolan, Michael Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 313 EP - 330 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 2 SN - 2169-9097, 2169-9097 KW - systems KW - volcanic rocks KW - lava flows KW - Moon KW - igneous rocks KW - radar methods KW - channels KW - mapping KW - hydrogen sulfide KW - analysis KW - Mare Serenitatis KW - grabens KW - gases KW - pyroclastics KW - dielectric properties KW - volcanism KW - tectonics KW - spectra KW - Rima Calippus KW - reflectance KW - regolith KW - faults KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643510?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Improved+discrimination+of+volcanic+complexes%2C+tectonic+features%2C+and+regolith+properties+in+Mare+Serenitatis+from+Earth-based+radar+mapping&rft.au=Campbell%2C+Bruce+A%3BHawke%2C+B+Ray%3BMorgan%2C+Gareth+A%3BCarter%2C+Lynn+M%3BCampbell%2C+Donald+B%3BNolan%2C+Michael&rft.aulast=Campbell&rft.aufirst=Bruce&rft.date=2014-02-01&rft.volume=119&rft.issue=2&rft.spage=313&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004486 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 - 63 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - analysis; channels; dielectric properties; faults; gases; grabens; hydrogen sulfide; igneous rocks; lava flows; mapping; Mare Serenitatis; Moon; pyroclastics; radar methods; reflectance; regolith; remote sensing; Rima Calippus; spectra; systems; tectonics; volcanic rocks; volcanism DO - http://dx.doi.org/10.1002/2013JE004486 ER - TY - JOUR T1 - Sulfur-bearing phases detected by evolved gas analysis of the Rocknest aeolian deposit, Gale Crater, Mars AN - 1542640467; 2014-046595 AB - The Sample Analysis at Mars (SAM) instrument suite detected SO (sub 2) , H (sub 2) S, OCS, and CS (sub 2) from approximately 450 to 800 degrees C during evolved gas analysis (EGA) of materials from the Rocknest aeolian deposit in Gale Crater, Mars. This was the first detection of evolved sulfur species from a Martian surface sample during in situ EGA. SO (sub 2) ( approximately 3-22 mu mol) is consistent with the thermal decomposition of Fe sulfates or Ca sulfites, or evolution/desorption from sulfur-bearing amorphous phases. Reactions between reduced sulfur phases such as sulfides and evolved O (sub 2) or H (sub 2) O in the SAM oven are another candidate SO (sub 2) source. H (sub 2) S ( approximately 41-109 nmol) is consistent with interactions of H (sub 2) O, H (sub 2) and/or HCl with reduced sulfur phases and/or SO (sub 2) in the SAM oven. OCS ( approximately 1-5 nmol) and CS (sub 2) ( approximately 0.2-1 nmol) are likely derived from reactions between carbon-bearing compounds and reduced sulfur. Sulfates and sulfites indicate some aqueous interactions, although not necessarily at the Rocknest site; Fe sulfates imply interaction with acid solutions whereas Ca sulfites can form from acidic to near-neutral solutions. Sulfides in the Rocknest materials suggest input from materials originally deposited in a reducing environment or from detrital sulfides from an igneous source. The presence of sulfides also suggests that the materials have not been extensively altered by oxidative aqueous weathering. The possibility of both reduced and oxidized sulfur compounds in the deposit indicates a nonequilibrium assemblage. Understanding the sulfur mineralogy in Rocknest materials, which exhibit chemical similarities to basaltic fines analyzed elsewhere on Mars, can provide insight in to the origin and alteration history of Martian surface materials. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - McAdam, Amy C AU - Franz, Heather B AU - Sutter, Brad AU - Archer, Paul D, Jr AU - Freissinet, Caroline AU - Eigenbrode, Jennifer L AU - Ming, Douglas W AU - Atreya, Sushil K AU - Bish, David L AU - Blake, David F AU - Bower, Hannah E AU - Brunner, Anna AU - Buch, Arnaud AU - Glavin, Daniel P AU - Grotzinger, John P AU - Mahaffy, Paul R AU - McLennan, Scott M AU - Morris, Richard V AU - Navarro-Gonzalez, Rafael AU - Rampe, Elizabeth B AU - Squyres, Steven W AU - Steele, Andrew AU - Stern, Jennifer C AU - Sumner, Dawn Y AU - Wray, James J Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 373 EP - 393 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 2 SN - 2169-9097, 2169-9097 KW - eolian features KW - sediment-water interface KW - impact features KW - sulfite ion KW - Mars KW - Rocknest landing site KW - aqueous solutions KW - analysis KW - Gale Crater KW - spacecraft KW - sediments KW - acidic composition KW - mineral assemblages KW - basaltic composition KW - water KW - sulfur dioxide KW - sand KW - sulfates KW - clastic sediments KW - weathering KW - samples KW - terrestrial planets KW - aqueous alteration KW - planets KW - sulfur KW - impact craters KW - sulfides KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542640467?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Sulfur-bearing+phases+detected+by+evolved+gas+analysis+of+the+Rocknest+aeolian+deposit%2C+Gale+Crater%2C+Mars&rft.au=McAdam%2C+Amy+C%3BFranz%2C+Heather+B%3BSutter%2C+Brad%3BArcher%2C+Paul+D%2C+Jr%3BFreissinet%2C+Caroline%3BEigenbrode%2C+Jennifer+L%3BMing%2C+Douglas+W%3BAtreya%2C+Sushil+K%3BBish%2C+David+L%3BBlake%2C+David+F%3BBower%2C+Hannah+E%3BBrunner%2C+Anna%3BBuch%2C+Arnaud%3BGlavin%2C+Daniel+P%3BGrotzinger%2C+John+P%3BMahaffy%2C+Paul+R%3BMcLennan%2C+Scott+M%3BMorris%2C+Richard+V%3BNavarro-Gonzalez%2C+Rafael%3BRampe%2C+Elizabeth+B%3BSquyres%2C+Steven+W%3BSteele%2C+Andrew%3BStern%2C+Jennifer+C%3BSumner%2C+Dawn+Y%3BWray%2C+James+J&rft.aulast=McAdam&rft.aufirst=Amy&rft.date=2014-02-01&rft.volume=119&rft.issue=2&rft.spage=373&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004518 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 - 157 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - acidic composition; analysis; aqueous alteration; aqueous solutions; basaltic composition; clastic sediments; eolian features; Gale Crater; impact craters; impact features; Mars; mineral assemblages; planets; Rocknest landing site; samples; sand; sediment-water interface; sediments; spacecraft; sulfates; sulfides; sulfite ion; sulfur; sulfur dioxide; terrestrial planets; water; weathering DO - http://dx.doi.org/10.1002/2013JE004518 ER - TY - JOUR T1 - Onset of Positional Vertigo During Exposure to Combined G Loading and Chest-to-Spine Vibration AN - 1534830895; 19974504 AB - Background: Aerospace environments commonly expose pilots to vibration and sustained acceleration, alone and in combination. Case Reports: Of 16 experimental research participants, 3 reported symptoms of vertigo and signs of torsional nystagmus during or shortly following exposure to sustained chest-to-spine (+3.8 G sub(x)) acceleration (G loading) and chest-to-spine (0.5 g sub(x)) vibration in the 8-16 Hz band. Two of the participants reported intermittent vertigo for up to 2 wk, were diagnosed with benign paroxysmal positional vertigo (BPPV), and were treated successfully with the Epley Maneuver. On a follow-up survey, a third participant reported transient BPPV-like vertigo, which resolved spontaneously. The follow-up survey also prompted participants to self-report other effects following research protocol exposure to vibration and G loading, revealing details about other minor and transient, but more common, effects that resolved within 3 h. Discussion: Our studies indicated a significantly elevated incidence of BPPV following exposure to vibration plus G loading compared to vibration alone that was positively correlated with participant age. One mechanism for the rolling sensation in BPPV involves broken or dislodged otoconia floating within one of the posterior semicircular canals, making the canal gravity-sensitive. Our observations highlight a heretofore unforeseen risk of otolith damage sustained during launch, undetectable in space, potentially contributing to vertigo and perceived tumbling upon re-entry from microgravity. JF - Aviation, Space, and Environmental Medicine AU - LISTON, DORION B AU - Adelstein, Bernard D AU - Stone, Leland S AD - From the NASA Ames Research Center, Moffett Field, CA; NASA Ames Research Center, Mail Stop 262-2, Moffett Field, CA 94035, dorion.b.liston@nasa.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 183 EP - 186 PB - Aerospace Medical Association, 320 S. Henry St. Alexandria VA 22314-3579 United States VL - 85 IS - 2 SN - 0095-6562, 0095-6562 KW - Health & Safety Science Abstracts; Risk Abstracts KW - BPPV KW - tumbling KW - wobblies KW - Canals KW - Age KW - Otoliths KW - Perception KW - Vibration KW - Pilots KW - Experimental research KW - H 2000:Transportation KW - R2 23010:General: Models, forecasting UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1534830895?accountid=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=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.atitle=Onset+of+Positional+Vertigo+During+Exposure+to+Combined+G+Loading+and+Chest-to-Spine+Vibration&rft.au=LISTON%2C+DORION+B%3BAdelstein%2C+Bernard+D%3BStone%2C+Leland+S&rft.aulast=LISTON&rft.aufirst=DORION&rft.date=2014-02-01&rft.volume=85&rft.issue=2&rft.spage=183&rft.isbn=&rft.btitle=&rft.title=Aviation%2C+Space%2C+and+Environmental+Medicine&rft.issn=00956562&rft_id=info:doi/10.3357%2FASEM.3784.2014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Number of references - 18 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Canals; Age; Otoliths; Perception; Vibration; Pilots; Experimental research DO - http://dx.doi.org/10.3357/ASEM.3784.2014 ER - TY - JOUR T1 - Long-period tidal variations in the length of day AN - 1529801923; 2014-035196 AB - A new model of long-period tidal variations in length of day is developed. The model comprises 80 spectral lines with periods between 18.6 years and 4.7 days, and it consistently includes effects of mantle anelasticity and dynamic ocean tides for all lines. The anelastic properties follow Wahr and Bergen; experimental confirmation for their results now exists at the fortnightly period, but there remains uncertainty when extrapolating to the longest periods. The ocean modeling builds on recent work with the fortnightly constituent, which suggests that oceanic tidal angular momentum can be reliably predicted at these periods without data assimilation. This is a critical property when modeling most long-period tides, for which little observational data exist. Dynamic ocean effects are quite pronounced at shortest periods as out-of-phase rotation components become nearly as large as in-phase components. The model is tested against a 20 year time series of space geodetic measurements of length of day. The current international standard model is shown to leave significant residual tidal energy, and the new model is found to mostly eliminate that energy, with especially large variance reduction for constituents Sa, Ssa, Mf, and Mt. Abstract Copyright (2014). American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Ray, Richard D AU - Erofeeva, Svetlana Y Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 1498 EP - 1509 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 2 SN - 2169-9313, 2169-9313 KW - tides KW - models KW - currents KW - laboratory studies KW - ocean circulation KW - experimental studies KW - mantle KW - anelasticity KW - length of day KW - ocean currents KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529801923?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Long-period+tidal+variations+in+the+length+of+day&rft.au=Ray%2C+Richard+D%3BErofeeva%2C+Svetlana+Y&rft.aulast=Ray&rft.aufirst=Richard&rft.date=2014-02-01&rft.volume=119&rft.issue=2&rft.spage=1498&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2013JB010830 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 - 22 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - anelasticity; currents; experimental studies; laboratory studies; length of day; mantle; models; ocean circulation; ocean currents; tides DO - http://dx.doi.org/10.1002/2013JB010830 ER - TY - JOUR T1 - Autotrophic and heterotrophic associated biosignatures in modern freshwater microbialites over seasonal and spatial gradients AN - 1524613393; 2014-031913 AB - Phospholipid fatty acid (PLFA) profiles and isotopic biosignatures associated with autotrophic and heterotrophic microbial processes in freshwater microbialites exposed to seasonal and spatial gradients in Pavilion Lake, British Columbia were investigated. The PLFA biosignature profiles of the microbialite associated microbial communities were dominated by saturated and monoenoic PLFAs and showed no resolvable response to variation in light or temperature down to a water depth of 33m and across seasons. Microbialite mean delta (super 13) C (sub org) values (-26.0+ or -3.8 ppm) and Delta delta (super 13) C (sub DIC-org) discrimination of ca. 25 ppm supported non-CO (sub 2) limited photosynthesis. More abundant and (super 13) C-depleted PLFAs (Delta delta (super 13) C 7-14 ppm vs. bulk organic matter) were indicative of autotrophic microbes. Less abundant and (super 13) C-depleted PLFAs (Delta delta (super 13) C 3-4 ppm) were indicative of heterotrophic organisms, particularly branched (iso/anteiso15:0 and 10me16:0) PLFAs. Dark coloured microbialites from the bottom of the lake (below 46 m water depth) had comparatively low biomass and a higher proportion of branched PLFAs, including biomarkers for sulfate reducing bacteria. Bulk delta (super 13) C (sub carb) values of microbialite carbonate at 6 and 11 m water depth were up to ca. 2 ppm more (super 13) C enriched than the value predicted for precipitation from ambient dissolved inorganic carbon and had increased biomass in summer, indicating a preserved biosignature of photosynthetic activity. Other delta (super 13) C (sub carb) values were generally within the range predicted for equilibrium precipitation. Estimated precipitation temperature values from delta (super 18) O (sub carb) were consistent with measured late summer water values. While both autotrophic and heterotrophic processes occurred at all depths, preservation of an enriched (super 13) C biosignature was only detected at shallow depths where photosynthetic activity and biomass production were relatively high. Abstract Copyright (2014) Elsevier, B.V. JF - Organic Geochemistry AU - Brady, Allyson L AU - Laval, Bernard AU - Lim, Darlene S S AU - Slater, Greg F Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 8 EP - 18 PB - Elsevier VL - 67 SN - 0146-6380, 0146-6380 KW - limestone KW - photosynthesis KW - fresh-water sedimentation KW - fatty acids KW - lipids KW - isotopes KW - biomass KW - stable isotopes KW - Pavilion Lake KW - sedimentary rocks KW - carbon KW - sediments KW - carboxylic acids KW - organic carbon KW - geochemistry KW - isotope ratios KW - C-13/C-12 KW - sedimentation KW - photochemistry KW - solutes KW - British Columbia KW - hydrochemistry KW - biomarkers KW - organic compounds KW - organic acids KW - biogenic processes KW - phospholipids KW - Canada KW - microbialite KW - lacustrine environment KW - Western Canada KW - carbonate rocks KW - microorganisms KW - lake sediments KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524613393?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Autotrophic+and+heterotrophic+associated+biosignatures+in+modern+freshwater+microbialites+over+seasonal+and+spatial+gradients&rft.au=Brady%2C+Allyson+L%3BLaval%2C+Bernard%3BLim%2C+Darlene+S+S%3BSlater%2C+Greg+F&rft.aulast=Brady&rft.aufirst=Allyson&rft.date=2014-02-01&rft.volume=67&rft.issue=&rft.spage=8&rft.isbn=&rft.btitle=&rft.title=Organic+Geochemistry&rft.issn=01466380&rft_id=info:doi/10.1016%2Fj.orggeochem.2013.11.013 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 - 72 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-05-15 N1 - SubjectsTermNotLitGenreText - biogenic processes; biomarkers; biomass; British Columbia; C-13/C-12; Canada; carbon; carbonate rocks; carboxylic acids; fatty acids; fresh-water sedimentation; geochemistry; hydrochemistry; isotope ratios; isotopes; lacustrine environment; lake sediments; limestone; lipids; microbialite; microorganisms; organic acids; organic carbon; organic compounds; Pavilion Lake; phospholipids; photochemistry; photosynthesis; sedimentary rocks; sedimentation; sediments; solutes; stable isotopes; Western Canada DO - http://dx.doi.org/10.1016/j.orggeochem.2013.11.013 ER - TY - JOUR T1 - Petrographic, chemical and spectroscopic evidence for thermal metamorphism in carbonaceous chondrites; I, CI and CM chondrites AN - 1520105288; 2014-028218 AB - We present a comprehensive description of petrologic, chemical and spectroscopic features of thermally metamorphosed CI-like and CM (and CM-like) chondrites. Only two such CI chondrites have so far been discovered i.e. Y-86029 and Y-82162. Thermal metamorphism in these chondrites is apparent in their low contents of H (sub 2) O, C and the most thermally labile trace elements, partial dehydration of matrix phyllosilicates and abundance of thermally decomposed Ca-Mg-Fe-Mn carbonates, which apparently resulted from heating of Mg-Fe carbonate precursors. The CM chondrites exhibit a wide range of aqueous and thermal alteration characteristics. This alteration was almost complete in Y-86720 and Y-86789, which also escaped alternating episodes of oxidation and sulfidization experienced by the others. Thermal metamorphism in the CM chondrites is apparent in loss of thermally labile trace elements and also in partial to almost complete dehydration of matrix phyllosilicates: heating was less uniform in them than in CI chondrites. This dehydration is also evident in strength and shapes of integrated intensities of the 3mu m bands except in PCA 91008, which experienced extensive terrestrial weathering. Tochilinite is absent in all but Y-793321 probably due to heating. Textural evidence for thermal metamorphism is conspicuous in blurring or integration/fusion of chondrules with matrix in the more extensively heated (> or =600 degrees C) CM chondrites like PCA 91008 and B-7904. TEM and XRD analyses reveal that phyllosilicate transformation to anhydrous phases proceeds via poorly crystalline, highly desiccated and disordered 'intermediate' phases in the least and moderately heated (400-600 degrees C) carbonaceous chondrites like WIS 91600, PCA 91008 and Y-86029. These findings are significant in that they confirm that these phases occur in meteorites as well as terrestrial samples. Thermal alteration in these meteorites can be used to identify other carbonaceous chondrites that were thermally metamorphosed in their parent bodies. Combining RNAA trace element data for experimentally heated Murchison CM2 samples with petrographic and spectroscopic data, these thermally metamorphosed carbonaceous chondrites can be ordered by severity of open system heating as 400 degrees C or =700 degrees C. Nearly all heated carbonaceous chondrites discovered so far have been found in Antarctica, which is known to have sampled the flux of near-Earth material for much longer than exemplified by current falls. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Tonui, Eric AU - Zolensky, Mike AU - Hiroi, Takahiro AU - Nakamura, Tomoki AU - Lipschutz, Michael E AU - Wang, Ming-Sheng AU - Okudaira, Kyoko Y1 - 2014/02/01/ PY - 2014 DA - 2014 Feb 01 SP - 284 EP - 306 PB - Elsevier, New York, NY VL - 126 SN - 0016-7037, 0016-7037 KW - stony meteorites KW - X-ray diffraction data KW - Y 82162 KW - Murchison Meteorite KW - infrared spectra KW - electron probe data KW - meteorites KW - FTIR spectra KW - mineral composition KW - major elements KW - spectra KW - chondrites KW - chemical composition KW - CI chondrites KW - Yamato Meteorites KW - experimental studies KW - textures KW - cosmochemistry KW - thermal metamorphism KW - carbonaceous chondrites KW - metamorphism KW - TEM data KW - Antarctica KW - heating KW - CM chondrites KW - Y 86029 KW - SEM data KW - 05B:Petrology of meteorites and tektites KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520105288?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Petrographic%2C+chemical+and+spectroscopic+evidence+for+thermal+metamorphism+in+carbonaceous+chondrites%3B+I%2C+CI+and+CM+chondrites&rft.au=Tonui%2C+Eric%3BZolensky%2C+Mike%3BHiroi%2C+Takahiro%3BNakamura%2C+Tomoki%3BLipschutz%2C+Michael+E%3BWang%2C+Ming-Sheng%3BOkudaira%2C+Kyoko&rft.aulast=Tonui&rft.aufirst=Eric&rft.date=2014-02-01&rft.volume=126&rft.issue=&rft.spage=284&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2013.10.053 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 - 54 N1 - PubXState - NY N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2014-08-14 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - Antarctica; carbonaceous chondrites; chemical composition; chondrites; CI chondrites; CM chondrites; cosmochemistry; electron probe data; experimental studies; FTIR spectra; heating; infrared spectra; major elements; metamorphism; meteorites; mineral composition; Murchison Meteorite; SEM data; spectra; stony meteorites; TEM data; textures; thermal metamorphism; X-ray diffraction data; Y 82162; Y 86029; Yamato Meteorites DO - http://dx.doi.org/10.1016/j.gca.2013.10.053 ER - TY - JOUR T1 - Transient climate effects of large impacts on Titan AN - 1510397468; 2014-021920 AB - Titan's thick atmosphere and volatile-rich surface cause it to respond to big impacts in a somewhat Earth-like manner. Here we construct a simple globally-averaged model that tracks the flow of energy through the environment in the weeks, years, and millenia after a big comet strikes Titan. The model Titan is endowed with 1.4 bars of N (sub 2) and 0.07 bars of CH (sub 4) , methane lakes, a water ice crust, and enough methane underground to saturate the regolith to the surface. We find that a nominal Menrva impact is big enough to raise the surface temperature by approximately 80 K and to double the amount of methane in the atmosphere. The extra methane drizzles out of the atmosphere over hundreds of years. An upper-limit Menrva is just big enough to raise the surface to water's melting point. The putative Hotei impact (a possible 800-1200 km diameter basin, Soderblom et al., 2009) is big enough to raise the surface temperature to 350-400 K. Water rain must fall and global meltwaters might range between 50 m to more than a kilometer deep, depending on the size of the event and how rapidly bedrock ice warms and founders. Global meltwater oceans do not last more than a few decades or centuries at most, but are interesting to consider given Titan's organic wealth. Significant near-surface clathrate formation is possible as Titan cools but faces major kinetic barriers. JF - Icarus AU - Zahnle, Kevin J AU - Korycansky, Donald G AU - Nixon, Conor A Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 378 EP - 391 PB - Elsevier, New York, NY VL - 229 SN - 0019-1035, 0019-1035 KW - icy satellites KW - lakes KW - aliphatic hydrocarbons KW - atmospheric precipitation KW - freezing KW - crater lakes KW - temperature KW - Menrva Crater KW - ice KW - cooling KW - Titan Satellite KW - satellites KW - rain KW - hydrology KW - methane KW - Hotei Crater KW - atmosphere KW - alkanes KW - impacts KW - clathrates KW - volatiles KW - organic compounds KW - transient phenomena KW - hydrocarbons KW - heating KW - regolith KW - meltwater KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397468?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Transient+climate+effects+of+large+impacts+on+Titan&rft.au=Zahnle%2C+Kevin+J%3BKorycansky%2C+Donald+G%3BNixon%2C+Conor+A&rft.aulast=Zahnle&rft.aufirst=Kevin&rft.date=2014-02-01&rft.volume=229&rft.issue=&rft.spage=378&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.11.006 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 68 N1 - PubXState - NY N1 - Document feature - illus. N1 - Last updated - 2014-03-27 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; atmosphere; atmospheric precipitation; clathrates; cooling; crater lakes; freezing; heating; Hotei Crater; hydrocarbons; hydrology; ice; icy satellites; impacts; lakes; meltwater; Menrva Crater; methane; organic compounds; rain; regolith; satellites; temperature; Titan Satellite; transient phenomena; volatiles DO - http://dx.doi.org/10.1016/j.icarus.2013.11.006 ER - TY - JOUR T1 - Sedimentology and climatic environment of alluvial fans in the martian Saheki Crater and a comparison with terrestrial fans in the Atacama Desert AN - 1510397308; 2014-021901 AB - The deflated surfaces of the alluvial fans in Saheki crater reveal the most detailed record of fan stratigraphy and evolution found, to date, on Mars. During deposition of at least the uppermost 100 m of fan deposits, discharges from the source basin consisted of channelized flows transporting sediment (which we infer to be primarily sand- and gravel-sized) as bedload coupled with extensive overbank mud-rich flows depositing planar beds of sand-sized or finer sediment. Flow events are inferred to have been of modest magnitude (probably less than approximately 60 m (super 3) /s), of short duration, and probably occupied only a few distributaries during any individual flow event. Occasional channel avulsions resulted in the distribution of sediment across the entire fan. A comparison with fine-grained alluvial fans in Chile's Atacama Desert provides insights into the processes responsible for constructing the Saheki crater fans: sediment is deposited by channelized flows (transporting sand through boulder-sized material) and overbank mudflows (sand size and finer) and wind erosion leaves channels expressed in inverted topographic relief. The most likely source of water was snowmelt released after annual or epochal accumulation of snow in the headwater source basin on the interior crater rim during the Hesperian to Amazonian periods. We infer the Saheki fans to have been constructed by many hundreds of separate flow events, and accumulation of the necessary snow and release of meltwater may have required favorable orbital configurations or transient global warming. JF - Icarus AU - Morgan, A M AU - Howard, A D AU - Hobley, D E J AU - Moore, J M AU - Dietrich, W E AU - Williams, R M E AU - Burr, D M AU - Grant, J A AU - Wilson, S A AU - Matsubara, Y Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 131 EP - 156 PB - Elsevier, New York, NY VL - 229 SN - 0019-1035, 0019-1035 KW - Saheki Crater KW - impact features KW - erosion KW - Mars KW - global change KW - atmospheric precipitation KW - Hesperian KW - Chile KW - outflow channels KW - paleoclimatology KW - mudflows KW - Atacama Desert KW - Amazonian KW - snow KW - mass movements KW - surface features KW - sediments KW - discharge KW - global warming KW - clastic sediments KW - wind erosion KW - channels KW - terrestrial planets KW - planets KW - South America KW - alluvial fans KW - runoff KW - fluvial features KW - terrestrial comparison KW - impact craters KW - overbank sediments KW - meltwater KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Sedimentology+and+climatic+environment+of+alluvial+fans+in+the+martian+Saheki+Crater+and+a+comparison+with+terrestrial+fans+in+the+Atacama+Desert&rft.au=Morgan%2C+A+M%3BHoward%2C+A+D%3BHobley%2C+D+E+J%3BMoore%2C+J+M%3BDietrich%2C+W+E%3BWilliams%2C+R+M+E%3BBurr%2C+D+M%3BGrant%2C+J+A%3BWilson%2C+S+A%3BMatsubara%2C+Y&rft.aulast=Morgan&rft.aufirst=A&rft.date=2014-02-01&rft.volume=229&rft.issue=&rft.spage=131&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.11.007 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 128 N1 - PubXState - NY N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - Last updated - 2014-03-27 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - alluvial fans; Amazonian; Atacama Desert; atmospheric precipitation; channels; Chile; clastic sediments; discharge; erosion; fluvial features; global change; global warming; Hesperian; impact craters; impact features; Mars; mass movements; meltwater; mudflows; outflow channels; overbank sediments; paleoclimatology; planets; runoff; Saheki Crater; sediments; snow; South America; surface features; terrestrial comparison; terrestrial planets; wind erosion DO - http://dx.doi.org/10.1016/j.icarus.2013.11.007 ER - TY - JOUR T1 - Extensive liquid meltwater storage in firn within the Greenland ice sheet AN - 1510397280; 2014-022134 JF - Nature Geoscience AU - Forster, Richard R AU - Box, Jason E AU - van den Broeke, Michiel R AU - Miege, Clement AU - Burgess, Evan W AU - van Angelen, Jan H AU - Lenaerts, Jan T M AU - Koenig, Lora S AU - Paden, John AU - Lewis, Cameron AU - Gogineni, S Prasad AU - Leuschen, Carl AU - McConnell, Joseph R Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 95 EP - 98 PB - Nature Publishing Group, London VL - 7 IS - 2 SN - 1752-0894, 1752-0894 KW - water storage KW - ice cores KW - ground-penetrating radar KW - Arctic region KW - firn KW - Greenland ice sheet KW - geophysical methods KW - radar methods KW - energy balance KW - ice sheets KW - ground water KW - aquifers KW - models KW - Greenland KW - mass balance KW - runoff KW - glacial geology KW - climate KW - meltwater KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397280?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Extensive+liquid+meltwater+storage+in+firn+within+the+Greenland+ice+sheet&rft.au=Forster%2C+Richard+R%3BBox%2C+Jason+E%3Bvan+den+Broeke%2C+Michiel+R%3BMiege%2C+Clement%3BBurgess%2C+Evan+W%3Bvan+Angelen%2C+Jan+H%3BLenaerts%2C+Jan+T+M%3BKoenig%2C+Lora+S%3BPaden%2C+John%3BLewis%2C+Cameron%3BGogineni%2C+S+Prasad%3BLeuschen%2C+Carl%3BMcConnell%2C+Joseph+R&rft.aulast=Forster&rft.aufirst=Richard&rft.date=2014-02-01&rft.volume=7&rft.issue=2&rft.spage=95&rft.isbn=&rft.btitle=&rft.title=Nature+Geoscience&rft.issn=17520894&rft_id=info:doi/10.1038%2FNGE02043 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 - 24 N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2014-03-27 N1 - SubjectsTermNotLitGenreText - aquifers; Arctic region; climate; energy balance; firn; geophysical methods; glacial geology; Greenland; Greenland ice sheet; ground water; ground-penetrating radar; ice cores; ice sheets; mass balance; meltwater; models; radar methods; runoff; water storage DO - http://dx.doi.org/10.1038/NGE02043 ER - TY - JOUR T1 - Spectral absorptions on Phobos and Deimos in the visible/near infrared wavelengths and their compositional constraints AN - 1510397197; 2014-021906 AB - Absorption features on Phobos and Deimos in the visible/near infrared wavelength region (0.4-3.9 mu m) are mapped using observations from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM). Fe (super 2+) electronic absorptions diagnostic of olivine and pyroxene are not detected. A broad absorption centered around 0.65 mu m within the red spectral units of both moons is detected, and this feature is also evident in telescopic, Pathfinder, and Phobos-2 observations of Phobos. A 2.8 mu m metal-OH combination absorption on both moons is also detected in the CRISM data, and this absorption is shallower in the Phobos blue unit than in the Phobos red unit and Deimos. The strength, position, and shape of both of the 0.65 mu m and 2.8 mu m absorptions are similar to features seen on red-sloped, low-albedo primitive asteroids. Two end-member hypotheses are presented to explain the spectral features on Phobos and Deimos. The first invokes the presence of highly desiccated Fe-phyllosilicate minerals indigenous to the bodies, and the second invokes Rayleigh scattering and absorption of small iron particles formed by exogenic space weathering processing, coupled with implantation of H from solar wind. Both end-member hypotheses may play a role, and in situ exploration will be needed to ultimately determine the underlying causes for the pair of spectral features observed on Phobos and Deimos. JF - Icarus AU - Fraeman, A A AU - Murchie, Scott L AU - Arvidson, R E AU - Clark, R N AU - Morris, R V AU - Rivkin, A S AU - Vilas, F Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 196 EP - 205 PB - Elsevier, New York, NY VL - 229 SN - 0019-1035, 0019-1035 KW - silicates KW - albedo KW - near-infrared spectra KW - optical spectra KW - solar wind KW - data processing KW - olivine group KW - mapping KW - Compact Reconnaissance Imaging Spectrometer for Mars KW - iron KW - absorption KW - pyroxene group KW - olivine KW - orthosilicates KW - spectra KW - satellites KW - Deimos Satellite KW - chain silicates KW - Phobos Satellite KW - CRISM KW - weathering KW - ferrous iron KW - desiccation KW - nesosilicates KW - hydroxyl ion KW - space weathering KW - metals KW - hydrogen KW - sheet silicates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397197?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Spectral+absorptions+on+Phobos+and+Deimos+in+the+visible%2Fnear+infrared+wavelengths+and+their+compositional+constraints&rft.au=Fraeman%2C+A+A%3BMurchie%2C+Scott+L%3BArvidson%2C+R+E%3BClark%2C+R+N%3BMorris%2C+R+V%3BRivkin%2C+A+S%3BVilas%2C+F&rft.aulast=Fraeman&rft.aufirst=A&rft.date=2014-02-01&rft.volume=229&rft.issue=&rft.spage=196&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.11.021 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 60 N1 - PubXState - NY N1 - Document feature - illus. N1 - Last updated - 2014-03-27 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - absorption; albedo; chain silicates; Compact Reconnaissance Imaging Spectrometer for Mars; CRISM; data processing; Deimos Satellite; desiccation; ferrous iron; hydrogen; hydroxyl ion; iron; mapping; metals; near-infrared spectra; nesosilicates; olivine; olivine group; optical spectra; orthosilicates; Phobos Satellite; pyroxene group; satellites; sheet silicates; silicates; solar wind; space weathering; spectra; weathering DO - http://dx.doi.org/10.1016/j.icarus.2013.11.021 ER - TY - JOUR T1 - Soil Moisture Initialization Error and Subgrid Variability of Precipitation in Seasonal Streamflow Forecasting AN - 1505345119; 19296946 AB - Offline simulations over the conterminous United States (CONUS) with a land surface model are used to address two issues relevant to the forecasting of large-scale seasonal streamflow: (i) the extent to which errors in soil moisture initialization degrade streamflow forecasts, and (ii) the extent to which a realistic increase in the spatial resolution of forecasted precipitation would improve streamflow forecasts. The addition of error to a soil moisture initialization field is found to lead to a nearly proportional reduction in large-scale seasonal streamflow forecast skill. The linearity of the response allows the determination of a lower bound for the increase in streamflow forecast skill achievable through improved soil moisture estimation, for example, through the assimilation of satellite-based soil moisture measurements. An increase in the resolution of precipitation is found to have an impact on large-scale seasonal streamflow forecasts only when evaporation variance is significant relative to precipitation variance. This condition is met only in the western half of the CONUS domain. Taken together, the two studies demonstrate the utility of a continental-scale land surfacemodeling system as a tool for addressing the science of hydrological prediction. JF - Journal of Hydrometeorology AU - Koster, Randal D AU - Walker, Gregory K AU - P Mahanama, Sarith P AU - Reichle, Rolf H AD - Global Modeling and Assimilation Office, NASA/GSFC, Greenbelt, Maryland Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 69 EP - 88 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 15 IS - 1 SN - 1525-755X, 1525-755X KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Prediction KW - Marine KW - Variability KW - Evaporation KW - Streamflow KW - Soil Water KW - Precipitation KW - Errors KW - Stream flow KW - USA KW - Hydrologic Models KW - Marine molluscs KW - Moisture Content KW - SW 5010:Network design KW - Q2 09171:Dynamics of lakes and rivers KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1505345119?accountid=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+Hydrometeorology&rft.atitle=Soil+Moisture+Initialization+Error+and+Subgrid+Variability+of+Precipitation+in+Seasonal+Streamflow+Forecasting&rft.au=Koster%2C+Randal+D%3BWalker%2C+Gregory+K%3BP+Mahanama%2C+Sarith+P%3BReichle%2C+Rolf+H&rft.aulast=Koster&rft.aufirst=Randal&rft.date=2014-02-01&rft.volume=15&rft.issue=1&rft.spage=69&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1175%2FJHM-D-13-050.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-01 N1 - Number of references - 40 N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Prediction; Marine molluscs; Stream flow; Variability; Hydrologic Models; Evaporation; Moisture Content; Streamflow; Precipitation; Soil Water; Errors; USA; Marine DO - http://dx.doi.org/10.1175/JHM-D-13-050.1 ER - TY - JOUR T1 - Simulation of a Flash Flooding Storm at the Steep Edge of the Himalayas* AN - 1505334828; 19296927 AB - A flash flood and landslide in the Leh region of the Indus Valley in the Indian state of Jammu and Kashmir on 56 August 2010 resulted in hundreds of deaths and great property damage. Observations have led to the hypothesis that the storm, which formed over the Tibetan Plateau, was steered over the steep edge of the plateau by 500-hPa winds and then energized by the ingestion of lower-level moist air, which was approaching from the Arabian Sea and Bay of Bengal and rose up the Himalayan barrier. A coupled land surface and atmospheric model simulation validates this hypothesized storm scenario, with the model storm taking the form of a traveling mesoscale squall line with a leading convective line, trailing stratiform region, and midlevel inflow jet. In this region, the development of a mesoscale storm over high terrain is highly unusual, especially one in the form of a propagating squall line system. This unusual storm occurrence and behavior could serve as a warning sign in flash flood prediction. The coupled atmosphere and land surface model showed that the excessive runoff leading to the flood and landslide were favored by the occurrence of this unusual meteorological event coinciding temporally and spatially with favorable hydrologic conditions. Additionally, the model simulations showed that previous rainstorms had moistened the soil during the entire season and especially over the few days leading up to the Leh flood, so the normally arid mountainsides were likely not able to rapidly absorb the additional rainfall of the sudden 5 August squall line. JF - Journal of Hydrometeorology AU - Kumar, Anil AU - Houze, Robert A, Jr AU - Rasmussen, Kristen L AU - Peters-Lidard, Christa AD - NASA Goddard Space Flight Center, Greenbelt, and Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, Maryland Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 212 EP - 228 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 15 IS - 1 SN - 1525-755X, 1525-755X KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - Prediction KW - Flash floods KW - Barriers KW - ISW, Arabian Sea KW - Pakistan, Himalayas KW - Storms KW - Squalls KW - Flood forecasting KW - Hydrologic Models KW - Floods KW - Seasonal variability KW - Simulation KW - ISW, Bangladesh, Bengal Bay KW - Mesoscale storms KW - Hydrometeorology KW - Atmosphere-hydrologic coupled models KW - Landslides KW - China, People's Rep., Xizang, Tibetan Plateau KW - Hydrometeorological research KW - India, Jammu and Kashmir KW - Numerical simulations KW - Convective activity KW - Flooding KW - Rainfall-runoff modeling KW - Flash Floods KW - Mesoscale models KW - Squall lines KW - Runoff KW - Oceanographic data KW - SW 5010:Network design KW - AQ 00006:Sewage KW - M2 556.16:Runoff (556.16) KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1505334828?accountid=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+Hydrometeorology&rft.atitle=Simulation+of+a+Flash+Flooding+Storm+at+the+Steep+Edge+of+the+Himalayas*&rft.au=Kumar%2C+Anil%3BHouze%2C+Robert+A%2C+Jr%3BRasmussen%2C+Kristen+L%3BPeters-Lidard%2C+Christa&rft.aulast=Kumar&rft.aufirst=Anil&rft.date=2014-02-01&rft.volume=15&rft.issue=1&rft.spage=212&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1175%2FJHM-D-12-0155.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-01 N1 - Number of references - 49 N1 - Last updated - 2014-12-11 N1 - SubjectsTermNotLitGenreText - Landslides; Flood forecasting; Barriers; Flooding; Simulation; Storms; Runoff; Flash floods; Mesoscale storms; Atmosphere-hydrologic coupled models; Hydrometeorological research; Numerical simulations; Floods; Convective activity; Rainfall-runoff modeling; Seasonal variability; Mesoscale models; Squall lines; Oceanographic data; Hydrometeorology; Prediction; Squalls; Hydrologic Models; Flash Floods; China, People's Rep., Xizang, Tibetan Plateau; India, Jammu and Kashmir; ISW, Arabian Sea; Pakistan, Himalayas; ISW, Bangladesh, Bengal Bay DO - http://dx.doi.org/10.1175/JHM-D-12-0155.1 ER - TY - JOUR T1 - The Impact of Different Absolute Solar Irradiance Values on Current Climate Model Simulations AN - 1500763847; 19066900 AB - Simulations of the preindustrial and doubled CO sub(2) climates are made with the GISS Global Climate Middle Atmosphere Model 3 using two different estimates of the absolute solar irradiance value: a higher value measured by solar radiometers in the 1990s and a lower value measured recently by the Solar Radiation and Climate Experiment. Each of the model simulations is adjusted to achieve global energy balance; without this adjustment the difference in irradiance produces a global temperature change of 0.4 degree C, comparable to the cooling estimated for the Maunder Minimum. The results indicate that by altering cloud cover the model properly compensates for the different absolute solar irradiance values on a global level when simulating both preindustrial and doubled CO sub(2) climates. On a regional level, the preindustrial climate simulations and the patterns of change with doubled CO sub(2) concentrations are again remarkably similar, but there are some differences. Using a higher absolute solar irradiance value and the requisite cloud cover affects the models depictions of high-latitude surface air temperature, sea level pressure, and stratospheric ozone, as well as tropical precipitation. In the climate change experiments it leads to an underestimation of North Atlantic warming, reduced precipitation in the tropical western Pacific, and smaller total ozone growth at high northern latitudes. Although significant, these differences are typically modest compared with the magnitude of the regional changes expected for doubled greenhouse gas concentrations. Nevertheless, the model simulations demonstrate that achieving the highest possible fidelity when simulating regional climate change requires that climate models use as input the most accurate (lower) solar irradiance value. JF - Journal of Climate AU - Rind, David H AU - Lean, Judith L AU - Jonas, Jeffrey AD - NASA GISS, New York, New York Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 1100 EP - 1120 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 27 IS - 3 SN - 0894-8755, 0894-8755 KW - Meteorological & Geoastrophysical Abstracts; Sustainability Science Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Sea level KW - Ozone in stratosphere KW - Rainfall KW - Climate change KW - Regional climates KW - Solar radiation KW - IS, Tropical Pacific KW - Air temperature KW - Radiometers KW - Solar radiometers KW - Latitude KW - Ozone KW - Marine KW - Climate models KW - Simulation KW - Greenhouse effect KW - Precipitation KW - Cloud cover KW - AN, North Atlantic KW - Stratosphere KW - Sea level pressure KW - Maunder minimum KW - Solar irradiance KW - Currents KW - Sea level pressures KW - Numerical simulations KW - Energy balance KW - Energy KW - Global temperature changes KW - Greenhouse gases KW - Carbon dioxide KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development KW - Q2 09167:Tides, surges and sea level KW - O 2050:Chemical Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1500763847?accountid=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=The+Impact+of+Different+Absolute+Solar+Irradiance+Values+on+Current+Climate+Model+Simulations&rft.au=Rind%2C+David+H%3BLean%2C+Judith+L%3BJonas%2C+Jeffrey&rft.aulast=Rind&rft.aufirst=David&rft.date=2014-02-01&rft.volume=27&rft.issue=3&rft.spage=1100&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-13-00136.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 24 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Radiometers; Energy balance; Climate change; Greenhouse effect; Cloud cover; Carbon dioxide; Air temperature; Sea level pressure; Ozone; Climate models; Ozone in stratosphere; Regional climates; Precipitation; Solar radiation; Solar irradiance; Maunder minimum; Sea level pressures; Numerical simulations; Solar radiometers; Global temperature changes; Sea level; Rainfall; Simulation; Stratosphere; Currents; Energy; Latitude; Greenhouse gases; AN, North Atlantic; IS, Tropical Pacific; Marine DO - http://dx.doi.org/10.1175/JCLI-D-13-00136.1 ER - TY - JOUR T1 - Quantifying how territory quality and sociobiology affect recruitment to inform fire management AN - 1496884020; 19017814 AB - The combined effects of habitat quality, breeder experience and sociobiology on population demography are poorly understood. Natural fire regimes, which influence habitat quality and sociobiology, have been replaced by controlled fire management in most ecosystems. Managing fire mosaics (vegetation at different ages since fire) can be important to sustain species in fire-maintained habitats, but requirements are usually poorly defined. Source-sink theory provides a foundation to quantify such habitat heterogeneity, but source-sink applications are largely focused on modeling. We quantified how habitat quality, breeder experience and non-breeding adult helpers affected Florida scrub-jay (Aphelocoma coerulescens) recruitment to describe source-sink heterogeneity within local populations. We used 22 years of census data of uniquely marked Florida scrub-jays to measure recruitment at 36 sites and combined that data with habitat-specific survival to characterize habitat-specific demography. To define habitat quality at the territory scale, we used static habitat features (soils, scrub oak cover) and dynamic habitat states (shrub heights and open sandy patches) that resulted from fire mosaics. Habitat quality most affected recruitment followed by the presence of helpers; fire mosaics, described by habitat states, determined whether territories functioned as strong sources, weak sources or sinks. Subdividing landscapes into habitat states allowed quantification of the fire mosaic at the territory scale and population scale, as the proportions of habitat states can predict local population growth rates. Our approach provides an example of how characterizing habitat quality at the territory scale, relative to source-sink categories, can explain habitat heterogeneity within local populations and inform fire management. JF - Animal Conservation AU - Breininger AU - Stolen, ED AU - Carter, G M AU - Oddy, D M AU - Legare, SA AD - NASA Ecological Programs. InoMedic Health Applications Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 72 EP - 79 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 17 IS - 1 SN - 1367-9430, 1367-9430 KW - Sustainability Science Abstracts; Ecology Abstracts KW - Sociobiology KW - Age KW - USA, Florida KW - Ecosystems KW - Population growth KW - Survival KW - Territory KW - Scrub KW - Soil KW - Demography KW - Shrubs KW - Fires KW - Data processing KW - Landscape KW - Recruitment KW - Vegetation KW - Habitat KW - Aphelocoma coerulescens KW - Mosaics KW - Conservation KW - Census KW - M3 1010:Issues in Sustainable Development KW - D 04060:Management and Conservation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1496884020?accountid=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=Animal+Conservation&rft.atitle=Quantifying+how+territory+quality+and+sociobiology+affect+recruitment+to+inform+fire+management&rft.au=Breininger%3BStolen%2C+ED%3BCarter%2C+G+M%3BOddy%2C+D+M%3BLegare%2C+SA&rft.aulast=Breininger&rft.aufirst=&rft.date=2014-02-01&rft.volume=17&rft.issue=1&rft.spage=72&rft.isbn=&rft.btitle=&rft.title=Animal+Conservation&rft.issn=13679430&rft_id=info:doi/10.1111%2Facv.12059 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-08-05 N1 - SubjectsTermNotLitGenreText - Shrubs; Fires; Age; Data processing; Population growth; Recruitment; Landscape; Vegetation; Survival; Territory; Habitat; Scrub; Demography; Soil; Mosaics; Conservation; Census; Sociobiology; Ecosystems; Aphelocoma coerulescens; USA, Florida DO - http://dx.doi.org/10.1111/acv.12059 ER - TY - GEN T1 - Cancer therapy-induced autonomic dysfunction in early breast cancer: implications for aerobic exercise training. AN - 1492676965; 24365613 JF - International journal of cardiology AU - Scott, Jessica M AU - Jones, Lee W AU - Hornsby, Whitney E AU - Koelwyn, Graeme J AU - Khouri, Michel G AU - Joy, Anil A AU - Douglas, Pamela S AU - Lakoski, Susan G Y1 - 2014/02/01/ PY - 2014 DA - 2014 Feb 01 SP - e50 EP - e51 VL - 171 IS - 2 KW - Antineoplastic Agents KW - 0 KW - Index Medicus KW - Autonomic function KW - Breast cancer KW - Cardiotoxicity KW - Exercise KW - Cardiovascular disease KW - Humans KW - Aged KW - Female KW - Breast Neoplasms -- drug therapy KW - Breast Neoplasms -- mortality KW - Exercise Therapy -- methods KW - Autonomic Nervous System Diseases -- therapy KW - Autonomic Nervous System Diseases -- chemically induced KW - Autonomic Nervous System Diseases -- mortality KW - Antineoplastic Agents -- adverse effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492676965?accountid=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=International+journal+of+cardiology&rft.atitle=Cancer+therapy-induced+autonomic+dysfunction+in+early+breast+cancer%3A+implications+for+aerobic+exercise+training.&rft.au=Scott%2C+Jessica+M%3BJones%2C+Lee+W%3BHornsby%2C+Whitney+E%3BKoelwyn%2C+Graeme+J%3BKhouri%2C+Michel+G%3BJoy%2C+Anil+A%3BDouglas%2C+Pamela+S%3BLakoski%2C+Susan+G&rft.aulast=Scott&rft.aufirst=Jessica&rft.date=2014-02-01&rft.volume=171&rft.issue=2&rft.spage=e50&rft.isbn=&rft.btitle=&rft.title=International+journal+of+cardiology&rft.issn=1874-1754&rft_id=info:doi/10.1016%2Fj.ijcard.2013.11.113 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-09-23 N1 - Date created - 2014-01-22 N1 - Date revised - 2017-01-14 N1 - SuppNotes - Cited By: J Clin Oncol. 2001 May 15;19(10):2746-53 [11352968] Pharmacol Rev. 2004 Jun;56(2):185-229 [15169927] Hypertension. 2009 Sep;54(3):652-8 [19652084] Am Heart J. 2010 Sep;160(3):487.e1-7 [20826257] Cancer Prev Res (Phila). 2013 Sep;6(9):925-37 [23842792] Breast Cancer Res. 2011;13(3):R64 [21689398] J Clin Oncol. 2012 Jul 10;30(20):2530-7 [22614980] Am J Physiol Endocrinol Metab. 2013 Jul 15;305(2):E243-53 [23695218] Metabolism. 2011 Aug;60(8):1115-21 [21306747] N1 - Last updated - 2017-01-19 DO - http://dx.doi.org/10.1016/j.ijcard.2013.11.113 ER - TY - JOUR T1 - Carbon-Temperature-Water change analysis for peanut production under climate change: a prototype for the AgMIP Coordinated Climate-Crop Modeling Project (C3MP) AN - 1492655966; 18968158 AB - Climate change is projected to push the limits of cropping systems and has the potential to disrupt the agricultural sector from local to global scales. This article introduces the Coordinated Climate-Crop Modeling Project (C3MP), an initiative of the Agricultural Model Intercomparison and Improvement Project (AgMIP) to engage a global network of crop modelers to explore the impacts of climate change via an investigation of crop responses to changes in carbon dioxide concentration ([ CO sub(2) ]), temperature, and water. As a demonstration of the C3MP protocols and enabled analyses, we apply the Decision Support System for Agrotechnology Transfer (DSSAT) CROPGRO-Peanut crop model for Henry County, Alabama, to evaluate responses to the range of plausible [ CO sub(2) ], temperature changes, and precipitation changes projected by climate models out to the end of the 21st century. These sensitivity tests are used to derive crop model emulators that estimate changes in mean yield and the coefficient of variation for seasonal yields across a broad range of climate conditions, reproducing mean yields from sensitivity test simulations with deviations of ca. 2% for rain-fed conditions. We apply these statistical emulators to investigate how peanuts respond to projections from various global climate models, time periods, and emissions scenarios, finding a robust projection of modest (20%) losses and larger uncertainty at the end of the century under the more severe representative concentration pathway (RCP8.5). This projection is not substantially altered by the selection of the AgMERRA global gridded climate dataset rather than the local historical observations, differences between the Third and Fifth Coupled Model Intercomparison Project (CMIP3 and CMIP5), or the use of the delta method of climate impacts analysis rather than the C3MP impacts response surface and emulator approach. JF - Global Change Biology AU - Ruane, Alex C AU - McDermid, Sonali AU - Rosenzweig, Cynthia AU - Baigorria, Guillermo A AU - Jones, James W AU - Romero, Consuelo C AU - DeWayne Cecil, L AD - Climate Impacts Group, NASA Goddard Institute for Space Studies, New York, NY, USA. Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 394 EP - 407 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 20 IS - 2 SN - 1354-1013, 1354-1013 KW - Pollution Abstracts; Sustainability Science Abstracts; Ecology Abstracts KW - AgMIP KW - agriculture KW - C3MP KW - climate change KW - climate impacts KW - crop model KW - carbon dioxide, temperature, and water KW - impacts response surface KW - Arachis hypogaea KW - Statistics KW - ASW, USA, Alabama KW - Rainfall KW - Climate change KW - Climatic changes KW - Statistical analysis KW - Nuts KW - Crops KW - Models KW - Sulfur dioxide KW - Emissions KW - Seasonal variations KW - Temperature effects KW - Artificial intelligence KW - Sensitivity KW - Decision support systems KW - Environmental impact KW - Temperature KW - Simulation KW - Precipitation KW - Water temperature KW - Air pollution forecasting KW - Carbon dioxide KW - P 0000:AIR POLLUTION KW - M3 1010:Issues in Sustainable Development KW - D 04030:Models, Methods, Remote Sensing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492655966?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Global+Change+Biology&rft.atitle=Carbon-Temperature-Water+change+analysis+for+peanut+production+under+climate+change%3A+a+prototype+for+the+AgMIP+Coordinated+Climate-Crop+Modeling+Project+%28C3MP%29&rft.au=Ruane%2C+Alex+C%3BMcDermid%2C+Sonali%3BRosenzweig%2C+Cynthia%3BBaigorria%2C+Guillermo+A%3BJones%2C+James+W%3BRomero%2C+Consuelo+C%3BDeWayne+Cecil%2C+L&rft.aulast=Ruane&rft.aufirst=Alex&rft.date=2014-02-01&rft.volume=20&rft.issue=2&rft.spage=394&rft.isbn=&rft.btitle=&rft.title=Global+Change+Biology&rft.issn=13541013&rft_id=info:doi/10.1111%2Fgcb.12412 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Temperature effects; Statistics; Climatic changes; Statistical analysis; Nuts; Water temperature; Precipitation; Carbon dioxide; Crops; Models; Sensitivity; Artificial intelligence; Rainfall; Decision support systems; Climate change; Temperature; Environmental impact; Simulation; Air pollution forecasting; Sulfur dioxide; Emissions; Seasonal variations; Arachis hypogaea; ASW, USA, Alabama DO - http://dx.doi.org/10.1111/gcb.12412 ER - TY - JOUR T1 - Synthesis of Pt Nanoparticles in Water-in-Oil Microemulsion: Effect of HCl on Their Surface Structure. AN - 1507191898; 24422507 AB - The synthesis of shape-controlled nanoparticles is currently a hot research topic. However, from an applied point of view, there is still a lack of easy, cheap, and scalable methodologies. In this communication we report, for the first time, the synthesis of cubic platinum nanoparticles with a very high yield using a water-in-oil microemulsion method, which unlike others, such as the colloidal method, fulfills the previous requirements. This shape/surface structure control is determined by the concentration of HCl in the water phase of the microemulsion. The results reported here show that the optimal HCl percentage in the water phase is about 25% to obtain the highest amount of cubic nanostructures. Ammonia electro-oxidation is used as a surface structure sensitive reaction to illustrate HCl surface structure effects. Moreover, in situ electrochemical characterization has been performed to study the nanoparticle surface structure. JF - Journal of the American Chemical Society AU - Martínez-Rodríguez, Roberto A AU - Vidal-Iglesias, Francisco J AU - Solla-Gullón, José AU - Cabrera, Carlos R AU - Feliu, Juan M AD - NASA-URC Center for Advanced Nanoscale Materials (CANM), Department of Chemistry, University of Puerto Rico , Rı́o Piedras Campus, P.O. Box 23346, San Juan 00931-3346, Puerto Rico. Y1 - 2014/01/29/ PY - 2014 DA - 2014 Jan 29 SP - 1280 EP - 1283 VL - 136 IS - 4 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1507191898?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+American+Chemical+Society&rft.atitle=Synthesis+of+Pt+Nanoparticles+in+Water-in-Oil+Microemulsion%3A+Effect+of+HCl+on+Their+Surface+Structure.&rft.au=Mart%C3%ADnez-Rodr%C3%ADguez%2C+Roberto+A%3BVidal-Iglesias%2C+Francisco+J%3BSolla-Gull%C3%B3n%2C+Jos%C3%A9%3BCabrera%2C+Carlos+R%3BFeliu%2C+Juan+M&rft.aulast=Mart%C3%ADnez-Rodr%C3%ADguez&rft.aufirst=Roberto&rft.date=2014-01-29&rft.volume=136&rft.issue=4&rft.spage=1280&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+American+Chemical+Society&rft.issn=1520-5126&rft_id=info:doi/10.1021%2Fja411939d LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-09-23 N1 - Date created - 2014-01-30 N1 - Date revised - 2017-01-14 N1 - Last updated - 2017-01-19 DO - http://dx.doi.org/10.1021/ja411939d ER - TY - JOUR T1 - A habitable fluvio-lacustrine environment at Yellowknife Bay, Gale Crater, Mars AN - 1520104963; 2014-030206 AB - The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of an environment that would have been suited to support a martian biosphere founded on chemolithoautotrophy. This aqueous environment was characterized by neutral pH, low salinity, and variable redox states of both iron and sulfur species. Carbon, hydrogen, oxygen, sulfur, nitrogen, and phosphorus were measured directly as key biogenic elements; by inference, phosphorus is assumed to have been available. The environment probably had a minimum duration of hundreds to tens of thousands of years. These results highlight the biological viability of fluvial-lacustrine environments in the post-Noachian history of Mars. JF - Science AU - Grotzinger, John P AU - Sumner, D Y AU - Kah, L C AU - Stack, K AU - Gupta, S AU - Edgar, L A AU - Rubin, D AU - Lewis, K W AU - Schieber, J AU - Mangold, N AU - Milliken, R E AU - Conrad, P G AU - Des Marais, D J AU - Farmer, J D AU - Siebach, K AU - Calef, F, III AU - Hurowitz, J A AU - McLennan, S M AU - Ming, D W AU - Vaniman, D T AU - Crisp, J A AU - Vasavada, A AU - Edgett, K S AU - Malin, M AU - Blake, D F AU - Gellert, R AU - Mahaffy, P R AU - Wiens, R C AU - Maurice, S AU - Grant, J A AU - Wilson, S AU - Anderson, R C AU - Beegle, L AU - Arvidson, R E AU - Hallet, B AU - Sletten, R S AU - Rice, M S AU - Bell, J F, III AU - Griffes, J AU - Ehlmann, B L AU - Anderson, R B AU - Bristow, T F AU - Dietrich, W E AU - Dromart, G AU - Eigenbrode, Jennifer L AU - Fraeman, A AU - Hardgrove, C AU - Herkenhoff, K E AU - Jandura, L AU - Kocurek, G AU - Lee, S AU - Leshin, L A AU - Leveille, R AU - Limonadi, D AU - Maki, J AU - McCloskey, S AU - Meyer, M AU - Minitti, M AU - Newsom, H E AU - Oehler, D AU - Okon, A AU - Palucis, M AU - Parker, T AU - Rowland, S AU - Schmidt, M AU - Squyres, S W AU - Steele, A AU - Stolper, E M AU - Summons, R E AU - Treiman, A H AU - Williams, R AU - Yingst, R A Y1 - 2014/01/24/ PY - 2014 DA - 2014 Jan 24 SP - 388 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6169 SN - 0036-8075, 0036-8075 KW - Yellowknife Bay KW - Noachian KW - astrobiology KW - Mars KW - cosmochemistry KW - salinity KW - Gale Crater KW - terrestrial planets KW - planets KW - sedimentary rocks KW - paleoenvironment KW - habitability KW - biosphere KW - Curiosity Rover KW - lacustrine environment KW - chemical composition KW - geochemistry KW - fluvial environment KW - pH KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520104963?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science&rft.atitle=A+habitable+fluvio-lacustrine+environment+at+Yellowknife+Bay%2C+Gale+Crater%2C+Mars&rft.au=Grotzinger%2C+John+P%3BSumner%2C+D+Y%3BKah%2C+L+C%3BStack%2C+K%3BGupta%2C+S%3BEdgar%2C+L+A%3BRubin%2C+D%3BLewis%2C+K+W%3BSchieber%2C+J%3BMangold%2C+N%3BMilliken%2C+R+E%3BConrad%2C+P+G%3BDes+Marais%2C+D+J%3BFarmer%2C+J+D%3BSiebach%2C+K%3BCalef%2C+F%2C+III%3BHurowitz%2C+J+A%3BMcLennan%2C+S+M%3BMing%2C+D+W%3BVaniman%2C+D+T%3BCrisp%2C+J+A%3BVasavada%2C+A%3BEdgett%2C+K+S%3BMalin%2C+M%3BBlake%2C+D+F%3BGellert%2C+R%3BMahaffy%2C+P+R%3BWiens%2C+R+C%3BMaurice%2C+S%3BGrant%2C+J+A%3BWilson%2C+S%3BAnderson%2C+R+C%3BBeegle%2C+L%3BArvidson%2C+R+E%3BHallet%2C+B%3BSletten%2C+R+S%3BRice%2C+M+S%3BBell%2C+J+F%2C+III%3BGriffes%2C+J%3BEhlmann%2C+B+L%3BAnderson%2C+R+B%3BBristow%2C+T+F%3BDietrich%2C+W+E%3BDromart%2C+G%3BEigenbrode%2C+Jennifer+L%3BFraeman%2C+A%3BHardgrove%2C+C%3BHerkenhoff%2C+K+E%3BJandura%2C+L%3BKocurek%2C+G%3BLee%2C+S%3BLeshin%2C+L+A%3BLeveille%2C+R%3BLimonadi%2C+D%3BMaki%2C+J%3BMcCloskey%2C+S%3BMeyer%2C+M%3BMinitti%2C+M%3BNewsom%2C+H+E%3BOehler%2C+D%3BOkon%2C+A%3BPalucis%2C+M%3BParker%2C+T%3BRowland%2C+S%3BSchmidt%2C+M%3BSquyres%2C+S+W%3BSteele%2C+A%3BStolper%2C+E+M%3BSummons%2C+R+E%3BTreiman%2C+A+H%3BWilliams%2C+R%3BYingst%2C+R+A&rft.aulast=Grotzinger&rft.aufirst=John&rft.date=2014-01-24&rft.volume=343&rft.issue=6169&rft.spage=388&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1242777 L2 - http://www.sciencemag.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 100 N1 - PubXState - DC N1 - Document feature - illus. incl. strat. col., sketch maps N1 - SuppNotes - Full text available only online N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - astrobiology; biosphere; chemical composition; cosmochemistry; Curiosity Rover; fluvial environment; Gale Crater; geochemistry; habitability; lacustrine environment; Mars; Noachian; paleoenvironment; pH; planets; salinity; sedimentary rocks; terrestrial planets; Yellowknife Bay DO - http://dx.doi.org/10.1126/science.1242777 ER - TY - JOUR T1 - In situ radiometric and exposure age dating of the Martian surface AN - 1520104709; 2014-030211 AB - We determined radiogenic and cosmogenic noble gases in a mudstone on the floor of Gale Crater. A K-Ar age of 4.21 + or - 0.35 billion years represents a mixture of detrital and authigenic components and confirms the expected antiquity of rocks comprising the crater rim. Cosmic-ray-produced (super 3) He, (super 21) Ne, and (super 36) Ar yield concordant surface exposure ages of 78 + or - 30 million years. Surface exposure occurred mainly in the present geomorphic setting rather than during primary erosion and transport. Our observations are consistent with mudstone deposition shortly after the Gale impact or possibly in a later event of rapid erosion and deposition. The mudstone remained buried until recent exposure by wind-driven scarp retreat. Sedimentary rocks exposed by this mechanism may thus offer the best potential for organic biomarker preservation against destruction by cosmic radiation. JF - Science AU - Farley, K A AU - Malespin, C AU - Mahaffy, P R AU - Grotzinger, John P AU - Vasconcelos, P M AU - Milliken, R E AU - Malin, M AU - Edgett, K S AU - Pavlov, A A AU - Hurowitz, J A AU - Grant, J A AU - Miller, H B AU - Arvidson, R E AU - Beegle, L AU - Calef, F, III AU - Conrad, P G AU - Dietrich, W E AU - Eigenbrode, Jennifer L AU - Gellert, R AU - Gupta, S AU - Hamilton, V AU - Hassler, Donald M AU - Lewis, K W AU - McLennan, S M AU - Ming, D W AU - Navarro-Gonzalez, R AU - Schwenzer, S P AU - Steele, A AU - Stolper, E M AU - Sumner, D Y AU - Vaniman, D T AU - Vasavada, A AU - Williford, K AU - Wimmer-Schweingruber, Robert F Y1 - 2014/01/24/ PY - 2014 DA - 2014 Jan 24 SP - 389 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6169 SN - 0036-8075, 0036-8075 KW - Hadean KW - relative age KW - Precambrian KW - Cretaceous KW - Mars KW - exposure age KW - Upper Cretaceous KW - Mesozoic KW - Gale Crater KW - terrestrial planets KW - planets KW - K/Ar KW - geochronology KW - dates KW - absolute age KW - cosmic rays KW - 03:Geochronology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520104709?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=In+situ+radiometric+and+exposure+age+dating+of+the+Martian+surface&rft.au=Farley%2C+K+A%3BMalespin%2C+C%3BMahaffy%2C+P+R%3BGrotzinger%2C+John+P%3BVasconcelos%2C+P+M%3BMilliken%2C+R+E%3BMalin%2C+M%3BEdgett%2C+K+S%3BPavlov%2C+A+A%3BHurowitz%2C+J+A%3BGrant%2C+J+A%3BMiller%2C+H+B%3BArvidson%2C+R+E%3BBeegle%2C+L%3BCalef%2C+F%2C+III%3BConrad%2C+P+G%3BDietrich%2C+W+E%3BEigenbrode%2C+Jennifer+L%3BGellert%2C+R%3BGupta%2C+S%3BHamilton%2C+V%3BHassler%2C+Donald+M%3BLewis%2C+K+W%3BMcLennan%2C+S+M%3BMing%2C+D+W%3BNavarro-Gonzalez%2C+R%3BSchwenzer%2C+S+P%3BSteele%2C+A%3BStolper%2C+E+M%3BSumner%2C+D+Y%3BVaniman%2C+D+T%3BVasavada%2C+A%3BWilliford%2C+K%3BWimmer-Schweingruber%2C+Robert+F&rft.aulast=Farley&rft.aufirst=K&rft.date=2014-01-24&rft.volume=343&rft.issue=6169&rft.spage=389&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1247166 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 - 67 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Full text available only online N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - absolute age; cosmic rays; Cretaceous; dates; exposure age; Gale Crater; geochronology; Hadean; K/Ar; Mars; Mesozoic; planets; Precambrian; relative age; terrestrial planets; Upper Cretaceous DO - http://dx.doi.org/10.1126/science.1247166 ER - TY - JOUR T1 - Mineralogy of a mudstone at Yellowknife Bay, Gale Crater, Mars AN - 1520104619; 2014-030207 AB - Sedimentary rocks at Yellowknife Bay (Gale crater) on Mars include mudstone sampled by the Curiosity rover. The samples, John Klein and Cumberland, contain detrital basaltic minerals, calcium sulfates, iron oxide or hydroxides, iron sulfides, amorphous material, and trioctahedral smectites. The John Klein smectite has basal spacing of approximately 10 angstroms, indicating little interlayer hydration. The Cumberland smectite has basal spacing at both approximately 13.2 and approximately 10 angstroms. The larger spacing suggests a partially chloritized interlayer or interlayer magnesium or calcium facilitating H (sub 2) O retention. Basaltic minerals in the mudstone are similar to those in nearby eolian deposits. However, the mudstone has far less Fe-forsterite, possibly lost with formation of smectite plus magnetite. Late Noachian/Early Hesperian or younger age indicates that clay mineral formation on Mars extended beyond Noachian time. JF - Science AU - Vaniman, D T AU - Bish, D L AU - Ming, D W AU - Bristow, T F AU - Morris, R V AU - Blake, D F AU - Chipera, S J AU - Morrison, S M AU - Treiman, A H AU - Rampe, E B AU - Rice, M S AU - Achilles, C N AU - Grotzinger, John P AU - McLennan, S M AU - Williams, J AU - Bell, J F, III AU - Newsom, H E AU - Downs, R T AU - Maurice, S AU - Sarrazin, P AU - Yen, A S AU - Morookian, J M AU - Farmer, J D AU - Stack, K AU - Milliken, R E AU - Ehlmann, B L AU - Sumner, D Y AU - Berger, G AU - Crisp, J A AU - Hurowitz, J A AU - Anderson, R B AU - Des Marais, D J AU - Stolper, E M AU - Edgett, K S AU - Gupta, S AU - Spanovich, N Y1 - 2014/01/24/ PY - 2014 DA - 2014 Jan 24 SP - 388 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6169 SN - 0036-8075, 0036-8075 KW - Yellowknife Bay KW - silicates KW - Noachian KW - mudstone KW - smectite KW - Mars KW - Hesperian KW - Gale Crater KW - exploration KW - clay minerals KW - terrestrial planets KW - planets KW - sedimentary rocks KW - mineral composition KW - Curiosity Rover KW - terrestrial comparison KW - sheet silicates KW - geochemistry KW - clastic rocks KW - 06A:Sedimentary petrology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520104619?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mineralogy+of+a+mudstone+at+Yellowknife+Bay%2C+Gale+Crater%2C+Mars&rft.au=Vaniman%2C+D+T%3BBish%2C+D+L%3BMing%2C+D+W%3BBristow%2C+T+F%3BMorris%2C+R+V%3BBlake%2C+D+F%3BChipera%2C+S+J%3BMorrison%2C+S+M%3BTreiman%2C+A+H%3BRampe%2C+E+B%3BRice%2C+M+S%3BAchilles%2C+C+N%3BGrotzinger%2C+John+P%3BMcLennan%2C+S+M%3BWilliams%2C+J%3BBell%2C+J+F%2C+III%3BNewsom%2C+H+E%3BDowns%2C+R+T%3BMaurice%2C+S%3BSarrazin%2C+P%3BYen%2C+A+S%3BMorookian%2C+J+M%3BFarmer%2C+J+D%3BStack%2C+K%3BMilliken%2C+R+E%3BEhlmann%2C+B+L%3BSumner%2C+D+Y%3BBerger%2C+G%3BCrisp%2C+J+A%3BHurowitz%2C+J+A%3BAnderson%2C+R+B%3BDes+Marais%2C+D+J%3BStolper%2C+E+M%3BEdgett%2C+K+S%3BGupta%2C+S%3BSpanovich%2C+N&rft.aulast=Vaniman&rft.aufirst=D&rft.date=2014-01-24&rft.volume=343&rft.issue=6169&rft.spage=388&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1243480 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 - 70 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Full text available only online N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - clastic rocks; clay minerals; Curiosity Rover; exploration; Gale Crater; geochemistry; Hesperian; Mars; mineral composition; mudstone; Noachian; planets; sedimentary rocks; sheet silicates; silicates; smectite; terrestrial comparison; terrestrial planets; Yellowknife Bay DO - http://dx.doi.org/10.1126/science.1243480 ER - TY - JOUR T1 - Mars' surface radiation environment measured with the Mars Science Laboratory's Curiosity Rover AN - 1520104611; 2014-030209 AB - The Radiation Assessment Detector (RAD) on the Mars Science Laboratory's Curiosity rover began making detailed measurements of the cosmic ray and energetic particle radiation environment on the surface of Mars on 7 August 2012. We report and discuss measurements of the absorbed dose and dose equivalent from galactic cosmic rays and solar energetic particles on the martian surface for approximately 300 days of observations during the current solar maximum. These measurements provide insight into the radiation hazards associated with a human mission to the surface of Mars and provide an anchor point with which to model the subsurface radiation environment, with implications for microbial survival times of any possible extant or past life, as well as for the preservation of potential organic biosignatures of the ancient martian environment. JF - Science AU - Hassler, Donald M AU - Zeitlin, Cary AU - Wimmer-Schweingruber, Robert F AU - Ehresmann, Bent AU - Rafkin, Scot AU - Eigenbrode, Jennifer L AU - Brinza, David E AU - Weigle, Gerald AU - Boettcher, Stephan AU - Boehm, Eckart AU - Burmeister, Soenke AU - Guo, Jingnan AU - Koehler, Jan AU - Martin, Cesar AU - Reitz, Guenther AU - Cucinotta, Francis A AU - Kim, Myung-Hee AU - Grinspoon, David AU - Bullock, Mark A AU - Posner, Arik AU - Gomez-Elvira, Javier AU - Vasavada, Ashwin AU - Grotzinger, John P Y1 - 2014/01/24/ PY - 2014 DA - 2014 Jan 24 SP - 389 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6169 SN - 0036-8075, 0036-8075 KW - astrobiology KW - Mars KW - measurement KW - exploration KW - terrestrial planets KW - models KW - planets KW - habitability KW - Curiosity Rover KW - solar radiation KW - Mars Science Laboratory KW - cosmic rays KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520104611?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mars%27+surface+radiation+environment+measured+with+the+Mars+Science+Laboratory%27s+Curiosity+Rover&rft.au=Hassler%2C+Donald+M%3BZeitlin%2C+Cary%3BWimmer-Schweingruber%2C+Robert+F%3BEhresmann%2C+Bent%3BRafkin%2C+Scot%3BEigenbrode%2C+Jennifer+L%3BBrinza%2C+David+E%3BWeigle%2C+Gerald%3BBoettcher%2C+Stephan%3BBoehm%2C+Eckart%3BBurmeister%2C+Soenke%3BGuo%2C+Jingnan%3BKoehler%2C+Jan%3BMartin%2C+Cesar%3BReitz%2C+Guenther%3BCucinotta%2C+Francis+A%3BKim%2C+Myung-Hee%3BGrinspoon%2C+David%3BBullock%2C+Mark+A%3BPosner%2C+Arik%3BGomez-Elvira%2C+Javier%3BVasavada%2C+Ashwin%3BGrotzinger%2C+John+P&rft.aulast=Hassler&rft.aufirst=Donald&rft.date=2014-01-24&rft.volume=343&rft.issue=6169&rft.spage=389&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1244797 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 - 70 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - astrobiology; cosmic rays; Curiosity Rover; exploration; habitability; instruments; Mars; Mars Science Laboratory; measurement; models; planets; solar radiation; terrestrial planets DO - http://dx.doi.org/10.1126/science.1244797 ER - TY - JOUR T1 - Volatile and organic compositions of sedimentary rocks in Yellowknife Bay, Gale Crater, Mars AN - 1520103892; 2014-030210 AB - H (sub 2) O, CO (sub 2) , SO (sub 2) , O (sub 2) , H (sub 2) , H (sub 2) S, HCl, chlorinated hydrocarbons, NO, and other trace gases were evolved during pyrolysis of two mudstone samples acquired by the Curiosity rover at Yellowknife Bay within Gale crater, Mars. H (sub 2) O/OH-bearing phases included 2:1 phyllosilicate(s), bassanite, akaganeite, and amorphous materials. Thermal decomposition of carbonates and combustion of organic materials are candidate sources for the CO (sub 2) . Concurrent evolution of O (sub 2) and chlorinated hydrocarbons suggests the presence of oxychlorine phase(s). Sulfides are likely sources for sulfur-bearing species. Higher abundances of chlorinated hydrocarbons in the mudstone compared with Rocknest windblown materials previously analyzed by Curiosity suggest that indigenous martian or meteoritic organic carbon sources may be preserved in the mudstone; however, the carbon source for the chlorinated hydrocarbons is not definitively of martian origin. JF - Science AU - Ming, D W AU - Archer, P D, Jr AU - Glavin, D P AU - Eigenbrode, Jennifer L AU - Franz, H B AU - Sutter, B AU - Brunner, A E AU - Stern, J C AU - Freissinet, C AU - McAdam, A C AU - Mahaffy, P R AU - Cabane, M AU - Coll, P AU - Campbell, J L AU - Atreya, S K AU - Niles, P B AU - Bell, J F, III AU - Bish, D L AU - Brinckerhoff, W B AU - Buch, A AU - Conrad, P G AU - Des Marais, D J AU - Ehlmann, B L AU - Fairen, A G AU - Farley, K A AU - Flesch, G J AU - Francois, P AU - Gellert, R AU - Grant, J A AU - Grotzinger, John P AU - Gupta, S AU - Herkenhoff, K E AU - Hurowitz, J A AU - Leshin, L A AU - Lewis, K W AU - McLennan, S M AU - Miller, K E AU - Moersch, J AU - Morris, R V AU - Navarro-Gonzalez, R AU - Pavlov, A A AU - Perrett, G M AU - Pradler, I AU - Squyres, S W AU - Summons, R E AU - Steele, A AU - Stolper, E M AU - Sumner, D Y AU - Szopa, C AU - Teinturier, S AU - Trainer, M G AU - Treiman, A H AU - Vaniman, D T AU - Vasavada, A R AU - Webster, C R AU - Wray, J J AU - Yingst, R A Y1 - 2014/01/24/ PY - 2014 DA - 2014 Jan 24 SP - 389 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6169 SN - 0036-8075, 0036-8075 KW - Yellowknife Bay KW - silicates KW - mudstone KW - Mars KW - cosmochemistry KW - Gale Crater KW - terrestrial planets KW - planets KW - volatiles KW - organic compounds KW - sedimentary rocks KW - mineral composition KW - carbon KW - Curiosity Rover KW - hydrocarbons KW - sheet silicates KW - trace elements KW - organic carbon KW - chemical composition KW - geochemistry KW - clastic rocks KW - 02C:Geochemistry of rocks, soils, and sediments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520103892?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Volatile+and+organic+compositions+of+sedimentary+rocks+in+Yellowknife+Bay%2C+Gale+Crater%2C+Mars&rft.au=Ming%2C+D+W%3BArcher%2C+P+D%2C+Jr%3BGlavin%2C+D+P%3BEigenbrode%2C+Jennifer+L%3BFranz%2C+H+B%3BSutter%2C+B%3BBrunner%2C+A+E%3BStern%2C+J+C%3BFreissinet%2C+C%3BMcAdam%2C+A+C%3BMahaffy%2C+P+R%3BCabane%2C+M%3BColl%2C+P%3BCampbell%2C+J+L%3BAtreya%2C+S+K%3BNiles%2C+P+B%3BBell%2C+J+F%2C+III%3BBish%2C+D+L%3BBrinckerhoff%2C+W+B%3BBuch%2C+A%3BConrad%2C+P+G%3BDes+Marais%2C+D+J%3BEhlmann%2C+B+L%3BFairen%2C+A+G%3BFarley%2C+K+A%3BFlesch%2C+G+J%3BFrancois%2C+P%3BGellert%2C+R%3BGrant%2C+J+A%3BGrotzinger%2C+John+P%3BGupta%2C+S%3BHerkenhoff%2C+K+E%3BHurowitz%2C+J+A%3BLeshin%2C+L+A%3BLewis%2C+K+W%3BMcLennan%2C+S+M%3BMiller%2C+K+E%3BMoersch%2C+J%3BMorris%2C+R+V%3BNavarro-Gonzalez%2C+R%3BPavlov%2C+A+A%3BPerrett%2C+G+M%3BPradler%2C+I%3BSquyres%2C+S+W%3BSummons%2C+R+E%3BSteele%2C+A%3BStolper%2C+E+M%3BSumner%2C+D+Y%3BSzopa%2C+C%3BTeinturier%2C+S%3BTrainer%2C+M+G%3BTreiman%2C+A+H%3BVaniman%2C+D+T%3BVasavada%2C+A+R%3BWebster%2C+C+R%3BWray%2C+J+J%3BYingst%2C+R+A&rft.aulast=Ming&rft.aufirst=D&rft.date=2014-01-24&rft.volume=343&rft.issue=6169&rft.spage=389&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1245267 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 - 65 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Full text available only online N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - carbon; chemical composition; clastic rocks; cosmochemistry; Curiosity Rover; Gale Crater; geochemistry; hydrocarbons; Mars; mineral composition; mudstone; organic carbon; organic compounds; planets; sedimentary rocks; sheet silicates; silicates; terrestrial planets; trace elements; volatiles; Yellowknife Bay DO - http://dx.doi.org/10.1126/science.1245267 ER - TY - JOUR T1 - Elemental geochemistry of sedimentary rocks at Yellowknife Bay, Gale Crater, Mars AN - 1520103769; 2014-030208 AB - Sedimentary rocks examined by the Curiosity rover at Yellowknife Bay, Mars, were derived from sources that evolved from an approximately average martian crustal composition to one influenced by alkaline basalts. No evidence of chemical weathering is preserved, indicating arid, possibly cold, paleoclimates and rapid erosion and deposition. The absence of predicted geochemical variations indicates that magnetite and phyllosilicates formed by diagenesis under low-temperature, circumneutral pH, rock-dominated aqueous conditions. Analyses of diagenetic features (including concretions, raised ridges, and fractures) at high spatial resolution indicate that they are composed of iron- and halogen-rich components, magnesium-iron-chlorine-rich components, and hydrated calcium sulfates, respectively. Composition of a cross-cutting dike-like feature is consistent with sedimentary intrusion. The geochemistry of these sedimentary rocks provides further evidence for diverse depositional and diagenetic sedimentary environments during the early history of Mars. JF - Science AU - McLennan, S M AU - Anderson, R B AU - Bell, J F, III AU - Bridges, J C AU - Calef, F, III AU - Campbell, J L AU - Clark, B C AU - Clegg, S AU - Conrad, P G AU - Cousin, A AU - Des Marais, D J AU - Dromart, G AU - Dyar, M D AU - Edgar, L A AU - Ehlmann, B L AU - Fabre, C AU - Forni, O AU - Gasnault, O AU - Gellert, R AU - Gordon, S AU - Grant, J A AU - Grotzinger, John P AU - Gupta, S AU - Herkenhoff, K E AU - Hurowitz, J A AU - King, P L AU - Le Mouelic, S AU - Leshin, L A AU - Leveille, R AU - Lewis, K W AU - Mangold, N AU - Maurice, S AU - Ming, D W AU - Morris, R V AU - Nachon, M AU - Newsom, H E AU - Ollila, A M AU - Perrett, G M AU - Rice, M S AU - Schmidt, M E AU - Schwenzer, S P AU - Stack, K AU - Stolper, E M AU - Sumner, D Y AU - Treiman, A H AU - VanBommel, S AU - Vaniman, D T AU - Vasavada, A AU - Wiens, R C AU - Yingst, R A Y1 - 2014/01/24/ PY - 2014 DA - 2014 Jan 24 SP - 388 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6169 SN - 0036-8075, 0036-8075 KW - Yellowknife Bay KW - silicates KW - chemical weathering KW - erosion KW - Mars KW - weathering KW - variations KW - Gale Crater KW - exploration KW - terrestrial planets KW - planets KW - sedimentary rocks KW - mineral composition KW - diagenesis KW - Curiosity Rover KW - sheet silicates KW - chemical composition KW - geochemistry KW - 02C:Geochemistry of rocks, soils, and sediments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520103769?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science&rft.atitle=Elemental+geochemistry+of+sedimentary+rocks+at+Yellowknife+Bay%2C+Gale+Crater%2C+Mars&rft.au=McLennan%2C+S+M%3BAnderson%2C+R+B%3BBell%2C+J+F%2C+III%3BBridges%2C+J+C%3BCalef%2C+F%2C+III%3BCampbell%2C+J+L%3BClark%2C+B+C%3BClegg%2C+S%3BConrad%2C+P+G%3BCousin%2C+A%3BDes+Marais%2C+D+J%3BDromart%2C+G%3BDyar%2C+M+D%3BEdgar%2C+L+A%3BEhlmann%2C+B+L%3BFabre%2C+C%3BForni%2C+O%3BGasnault%2C+O%3BGellert%2C+R%3BGordon%2C+S%3BGrant%2C+J+A%3BGrotzinger%2C+John+P%3BGupta%2C+S%3BHerkenhoff%2C+K+E%3BHurowitz%2C+J+A%3BKing%2C+P+L%3BLe+Mouelic%2C+S%3BLeshin%2C+L+A%3BLeveille%2C+R%3BLewis%2C+K+W%3BMangold%2C+N%3BMaurice%2C+S%3BMing%2C+D+W%3BMorris%2C+R+V%3BNachon%2C+M%3BNewsom%2C+H+E%3BOllila%2C+A+M%3BPerrett%2C+G+M%3BRice%2C+M+S%3BSchmidt%2C+M+E%3BSchwenzer%2C+S+P%3BStack%2C+K%3BStolper%2C+E+M%3BSumner%2C+D+Y%3BTreiman%2C+A+H%3BVanBommel%2C+S%3BVaniman%2C+D+T%3BVasavada%2C+A%3BWiens%2C+R+C%3BYingst%2C+R+A&rft.aulast=McLennan&rft.aufirst=S&rft.date=2014-01-24&rft.volume=343&rft.issue=6169&rft.spage=388&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1244734 L2 - http://www.sciencemag.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 72 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Full text available only online N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - chemical composition; chemical weathering; Curiosity Rover; diagenesis; erosion; exploration; Gale Crater; geochemistry; Mars; mineral composition; planets; sedimentary rocks; sheet silicates; silicates; terrestrial planets; variations; weathering; Yellowknife Bay DO - http://dx.doi.org/10.1126/science.1244734 ER - TY - JOUR T1 - Ancient aqueous environments at Endeavour Crater, Mars AN - 1520103620; 2014-030212 AB - Opportunity has investigated in detail rocks on the rim of the Noachian age Endeavour crater, where orbital spectral reflectance signatures indicate the presence of Fe (super +3) -rich smectites. The signatures are associated with fine-grained, layered rocks containing spherules of diagenetic or impact origin. The layered rocks are overlain by breccias, and both units are cut by calcium sulfate veins precipitated from fluids that circulated after the Endeavour impact. Compositional data for fractures in the layered rocks suggest formation of Al-rich smectites by aqueous leaching. Evidence is thus preserved for water-rock interactions before and after the impact, with aqueous environments of slightly acidic to circum-neutral pH that would have been more favorable for prebiotic chemistry and microorganisms than those recorded by younger sulfate-rich rocks at Meridiani Planum. JF - Science AU - Arvidson, R E AU - Squyres, S W AU - Bell, J F, III AU - Catalano, J G AU - Clark, B C AU - Crumpler, L S AU - de Souza, P A, Jr AU - Fairen, A G AU - Farrand, W H AU - Fox, V K AU - Gellert, R AU - Ghosh, A AU - Golombek, M P AU - Grotzinger, John P AU - Guinness, E A AU - Herkenhoff, K E AU - Jolliff, B L AU - Knoll, A H AU - Li, R AU - McLennan, S M AU - Ming, D W AU - Mittlefehldt, David W AU - Moore, J M AU - Morris, R V AU - Murchie, S L AU - Parker, T J AU - Paulsen, G AU - Rice, J W AU - Ruff, S W AU - Smith, M D AU - Wolff, M J Y1 - 2014/01/24/ PY - 2014 DA - 2014 Jan 24 SP - 387 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6169 SN - 0036-8075, 0036-8075 KW - silicates KW - breccia KW - Noachian KW - Opportunity Rover KW - smectite KW - astrobiology KW - Mars KW - clay minerals KW - terrestrial planets KW - Mars Exploration Rover KW - planets KW - sedimentary rocks KW - paleoenvironment KW - diagenesis KW - sheet silicates KW - aquatic environment KW - pH KW - microorganisms KW - Endeavour Crater KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520103620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Ancient+aqueous+environments+at+Endeavour+Crater%2C+Mars&rft.au=Arvidson%2C+R+E%3BSquyres%2C+S+W%3BBell%2C+J+F%2C+III%3BCatalano%2C+J+G%3BClark%2C+B+C%3BCrumpler%2C+L+S%3Bde+Souza%2C+P+A%2C+Jr%3BFairen%2C+A+G%3BFarrand%2C+W+H%3BFox%2C+V+K%3BGellert%2C+R%3BGhosh%2C+A%3BGolombek%2C+M+P%3BGrotzinger%2C+John+P%3BGuinness%2C+E+A%3BHerkenhoff%2C+K+E%3BJolliff%2C+B+L%3BKnoll%2C+A+H%3BLi%2C+R%3BMcLennan%2C+S+M%3BMing%2C+D+W%3BMittlefehldt%2C+David+W%3BMoore%2C+J+M%3BMorris%2C+R+V%3BMurchie%2C+S+L%3BParker%2C+T+J%3BPaulsen%2C+G%3BRice%2C+J+W%3BRuff%2C+S+W%3BSmith%2C+M+D%3BWolff%2C+M+J&rft.aulast=Arvidson&rft.aufirst=R&rft.date=2014-01-24&rft.volume=343&rft.issue=6169&rft.spage=387&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1248097 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 - 46 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch map N1 - SuppNotes - Full text available only online N1 - Last updated - 2014-05-01 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - aquatic environment; astrobiology; breccia; clay minerals; diagenesis; Endeavour Crater; Mars; Mars Exploration Rover; microorganisms; Noachian; Opportunity Rover; paleoenvironment; pH; planets; sedimentary rocks; sheet silicates; silicates; smectite; terrestrial planets DO - http://dx.doi.org/10.1126/science.1248097 ER - TY - NEWS T1 - UAS Test Site Selection Good News for NASA Langley, Wallops AN - 1490837945 JF - UPI Space Daily AU - Kathy Barnstorff for Langley Research Center Y1 - 2014/01/22/ PY - 2014 DA - 2014 Jan 22 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490837945?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=UAS+Test+Site+Selection+Good+News+for+NASA+Langley%2C+Wallops&rft.au=Kathy+Barnstorff+for+Langley+Research+Center&rft.aulast=Kathy+Barnstorff+for+Langley+Research+Center&rft.aufirst=&rft.date=2014-01-22&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-01-22 ER - TY - JOUR T1 - The discovery of cometary activity in near-Earth asteroid (3552) Don Quixote AN - 1832584860; 689287-25 AB - The near-Earth object (NEO) population, which mainly consists of fragments from collisions between asteroids in the main asteroid belt, is thought to include contributions from short-period comets as well. One of the most promising NEO candidates for a cometary origin is near-Earth asteroid (3552) Don Quixote, which has never been reported to show activity. Here we present the discovery of cometary activity in Don Quixote based on thermal-infrared observations made with the Spitzer Space Telescope in its 3.6 and 4.5 mu m bands. Our observations clearly show the presence of a coma and a tail in the 4.5 mu m but not in the 3.6 mu m band, which is consistent with molecular band emission from CO (sub 2) . Thermal modeling of the combined photometric data on Don Quixote reveals a diameter of 18.4 (sub -0.4) (super 0.3) km and an albedo of 0.03 (sub -0.01) (super 0.02) , which confirms Don Quixote to be the third-largest known NEO. We derive an upper limit on the dust production rate of 1.9 kg s (super -1) and derive a CO (sub 2) gas production rate of (1.1 + or - 0.1) X 10 (super 26) molecules s (super -1) . Spitzer Infrared Spectrograph spectroscopic observations indicate the presence of fine-grained silicates, perhaps pyroxene rich, on the surface of Don Quixote. Our discovery suggests that CO (sub 2) can be present in near-Earth space over a long time. The presence of CO (sub 2) might also explain that Don Quixote's cometary nature remained hidden for nearly three decades. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Mommert, Michael AU - Hora, Joseph L AU - Harris, Alan W AU - Reach, William T AU - Emery, Joshua P AU - Thomas, Cristina A AU - Mueller, Michael AU - Cruikshank, Dale P AU - Trilling, David E AU - Delbo, Marco AU - Smith, Howard A Y1 - 2014/01/20/ PY - 2014 DA - 2014 Jan 20 EP - Paper no. 25 PB - IOP Publishing for American Astronomical Society, Bristol VL - 781 IS - 1 SN - 0004-637X, 0004-637X KW - silicates KW - near-Earth objects KW - asteroids KW - telescope methods KW - Spitzer Space Telescope KW - near-Earth asteroids KW - comae KW - infrared spectra KW - gases KW - carbon dioxide KW - models KW - photometry KW - pyroxene group KW - comets KW - Don Quixote Asteroid KW - classification KW - spectra KW - cometary dust KW - chain silicates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832584860?accountid=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=The+discovery+of+cometary+activity+in+near-Earth+asteroid+%283552%29+Don+Quixote&rft.au=Mommert%2C+Michael%3BHora%2C+Joseph+L%3BHarris%2C+Alan+W%3BReach%2C+William+T%3BEmery%2C+Joshua+P%3BThomas%2C+Cristina+A%3BMueller%2C+Michael%3BCruikshank%2C+Dale+P%3BTrilling%2C+David+E%3BDelbo%2C+Marco%3BSmith%2C+Howard+A&rft.aulast=Mommert&rft.aufirst=Michael&rft.date=2014-01-20&rft.volume=781&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F781%2F1%2F25 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 - 61 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - asteroids; carbon dioxide; chain silicates; classification; comae; cometary dust; comets; Don Quixote Asteroid; gases; infrared spectra; models; near-Earth asteroids; near-Earth objects; photometry; pyroxene group; silicates; spectra; Spitzer Space Telescope; telescope methods DO - http://dx.doi.org/10.1088/0004-637X/781/1/25 ER - TY - JOUR T1 - Initial in situ measurements of perennial meltwater storage in the Greenland firn aquifer AN - 1553090045; 2014-061912 AB - A perennial storage of water in a firn aquifer was discovered in southeast Greenland in 2011. We present the first in situ measurements of the aquifer, including densities and temperatures. Water was present at depths between approximately 12 and 37 m and amounted to 18.7 + or - 0.9 kg in the extracted core. The water filled the firn to capacity at approximately 35 m. Measurements show the aquifer temperature remained at the melting point, representing a large heat reservoir within the firn. Using model results of liquid water extent and aquifer surface depth from radar measurements, we extend our in situ measurements to the Greenland ice sheet. The estimated water volume is 140 + or - 20 Gt, representing approximately 0.4 mm of sea level rise (SLR). It is unknown if the aquifer temporary buffers SLR or contributes to SLR through drainage and/or ice dynamics. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Koenig, Lora S AU - Miege, Clement AU - Forster, Richard R AU - Brucker, Ludovic Y1 - 2014/01/16/ PY - 2014 DA - 2014 Jan 16 SP - 81 EP - 85 PB - American Geophysical Union, Washington, DC VL - 41 IS - 1 SN - 0094-8276, 0094-8276 KW - hydrology KW - water storage KW - subglacial processes KW - Arctic region KW - firn KW - Greenland ice sheet KW - ice sheets KW - ground water KW - aquifers KW - Greenland KW - glacial geology KW - meltwater KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553090045?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Initial+in+situ+measurements+of+perennial+meltwater+storage+in+the+Greenland+firn+aquifer&rft.au=Koenig%2C+Lora+S%3BMiege%2C+Clement%3BForster%2C+Richard+R%3BBrucker%2C+Ludovic&rft.aulast=Koenig&rft.aufirst=Lora&rft.date=2014-01-16&rft.volume=41&rft.issue=1&rft.spage=81&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2013GL058083 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 36 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2014-08-14 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - aquifers; Arctic region; firn; glacial geology; Greenland; Greenland ice sheet; ground water; hydrology; ice sheets; meltwater; subglacial processes; water storage DO - http://dx.doi.org/10.1002/2013GL058083 ER - TY - JOUR T1 - Infrared spectra and optical constants of astronomical ices; I, Amorphous and crystalline acetylene AN - 1510397590; 2014-021886 AB - Here we report recent measurements on acetylene (C (sub 2) H (sub 2) ) ices at temperatures applicable to the outer Solar System and the interstellar medium. New near- and mid-infrared data, including optical constants (n, k), absorption coefficients (alpha ), and absolute band strengths (A), are presented for both amorphous and crystalline phases of C (sub 2) H (sub 2) that exist below 70 K. Comparisons are made to earlier work. Electronic versions of the data are made available, as is a computer routine to use our reported n and k values to simulate the observed IR spectra. Suggestions are given for the use of the data and a comparison to a spectrum of Makemake is made. JF - Icarus AU - Hudson, R L AU - Ferrante, R F AU - Moore, M H Y1 - 2014/01/15/ PY - 2014 DA - 2014 Jan 15 SP - 276 EP - 287 PB - Elsevier, New York, NY VL - 228 SN - 0019-1035, 0019-1035 KW - solar system KW - acetylene KW - outer solar system KW - amorphous materials KW - aliphatic hydrocarbons KW - interstellar medium KW - crystallinity KW - temperature KW - infrared spectra KW - laboratory studies KW - absorption KW - organic compounds KW - ice KW - alkynes KW - optical constants KW - low temperature KW - hydrocarbons KW - spectra KW - Trans-neptunian objects KW - refractive index KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397590?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Infrared+spectra+and+optical+constants+of+astronomical+ices%3B+I%2C+Amorphous+and+crystalline+acetylene&rft.au=Hudson%2C+R+L%3BFerrante%2C+R+F%3BMoore%2C+M+H&rft.aulast=Hudson&rft.aufirst=R&rft.date=2014-01-15&rft.volume=228&rft.issue=&rft.spage=276&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.08.029 L2 - http://www.sciencedirect.com/science/journal/00191035 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 - NY N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2014-03-27 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - absorption; acetylene; aliphatic hydrocarbons; alkynes; amorphous materials; crystallinity; hydrocarbons; ice; infrared spectra; interstellar medium; laboratory studies; low temperature; optical constants; organic compounds; outer solar system; refractive index; solar system; spectra; temperature; Trans-neptunian objects DO - http://dx.doi.org/10.1016/j.icarus.2013.08.029 ER - TY - JOUR T1 - Olivine-dominated asteroids; mineralogy and origin AN - 1510397324; 2014-021887 AB - Olivine-dominated asteroids are a rare type of objects formed either in nebular processes or through magmatic differentiation. The analysis of meteorite samples suggest that at least 100 parent bodies in the main belt experienced partial or complete melting and differentiation before being disrupted. However, only a few olivine-dominated asteroids, representative of the mantle of disrupted differentiated bodies, are known to exist. Due to the paucity of these objects in the main belt their origin and evolution have been a matter of great debate over the years. In this work we present a detailed mineralogical analysis of twelve olivine-dominated asteroids. We have obtained near-infrared (NIR) spectra (0.7-2.4 mu m) of asteroids (246) Asporina, (289) Nenetta, (446) Aeternitas, (863) Benkoela, (4125) Lew Allen and (4490) Bamberry. Observations were conducted with the Infrared Telescope Facility (IRTF) on Mauna Kea, Hawai'i. This sample was complemented with spectra of six other olivine-dominated asteroids including (354) Eleonora, (984) Gretia, (1951) Lick, (2501) Lohja, (3819) Robinson and (5261) Eureka obtained by previous workers. Within our sample we distinguish two classes, one that we call monomineralic-olivine asteroids, which are those whose spectra only exhibit the 1 mu m feature, and another referred to as olivine-rich asteroids, whose spectra exhibit the 1 mu m feature and a weak (Band II depth approximately 4%) 2 mu m feature. For the monomineralic-olivine asteroids the olivine chemistry was found to range from approximately Fo (sub 49) to Fo (sub 70) , consistent with the values measured for brachinites and R chondrites. In the case of the olivine-rich asteroids we determined their olivine and low-Ca pyroxene abundance using a new set of spectral calibrations derived from the analysis of R chondrites spectra. We found that the olivine abundance for these asteroids varies from 0.68 to 0.93, while the fraction of low-Ca pyroxene to total pyroxene ranges from 0.6 to 0.9. A search for dynamical connections between the olivine-dominated asteroids and asteroid families found no genetic link (of the type core-mantel-crust) between these objects. JF - Icarus AU - Sanchez, Juan A AU - Reddy, Vishnu AU - Kelley, Michael S AU - Cloutis, Edward A AU - Bottke, William F AU - Nesvorny, David AU - Lucas, Michael P AU - Hardersen, Paul S AU - Gaffey, Michael J AU - Abell, Paul A AU - Le Corre, Lucille Y1 - 2014/01/15/ PY - 2014 DA - 2014 Jan 15 SP - 288 EP - 300 PB - Elsevier, New York, NY VL - 228 SN - 0019-1035, 0019-1035 KW - silicates KW - calcium KW - near-infrared spectra KW - magmatic differentiation KW - stony meteorites KW - asteroids KW - Bamberry Asteroid KW - partial melting KW - Nenetta Asteroid KW - olivine group KW - calibration KW - meteorites KW - pyroxene group KW - mineral composition KW - olivine KW - Aeternitas Asteroid KW - orthosilicates KW - spectra KW - chondrites KW - chain silicates KW - alkaline earth metals KW - parent bodies KW - Infrared Telescope Facility KW - Lew Allen Asteroid KW - Benkoela Asteroid KW - Asporina Asteroid KW - achondrites KW - nesosilicates KW - metals KW - rumurutiites KW - brachinite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510397324?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Olivine-dominated+asteroids%3B+mineralogy+and+origin&rft.au=Sanchez%2C+Juan+A%3BReddy%2C+Vishnu%3BKelley%2C+Michael+S%3BCloutis%2C+Edward+A%3BBottke%2C+William+F%3BNesvorny%2C+David%3BLucas%2C+Michael+P%3BHardersen%2C+Paul+S%3BGaffey%2C+Michael+J%3BAbell%2C+Paul+A%3BLe+Corre%2C+Lucille&rft.aulast=Sanchez&rft.aufirst=Juan&rft.date=2014-01-15&rft.volume=228&rft.issue=&rft.spage=288&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2013.10.006 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 82 N1 - PubXState - NY N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2014-08-14 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - achondrites; Aeternitas Asteroid; alkaline earth metals; Asporina Asteroid; asteroids; Bamberry Asteroid; Benkoela Asteroid; brachinite; calcium; calibration; chain silicates; chondrites; Infrared Telescope Facility; Lew Allen Asteroid; magmatic differentiation; metals; meteorites; mineral composition; near-infrared spectra; Nenetta Asteroid; nesosilicates; olivine; olivine group; orthosilicates; parent bodies; partial melting; pyroxene group; rumurutiites; silicates; spectra; stony meteorites DO - http://dx.doi.org/10.1016/j.icarus.2013.10.006 ER - TY - JOUR T1 - Transient water vapor at Europa's south pole AN - 1502298270; 2014-014654 AB - In November and December 2012, the Hubble Space Telescope (HST) imaged Europa's ultraviolet emissions in the search for vapor plume activity. We report statistically significant coincident surpluses of hydrogen Lyman-alpha and oxygen OI 130.4-nanometer emissions above the southern hemisphere in December 2012. These emissions were persistently found in the same area over the 7 hours of the observation, suggesting atmospheric inhomogeneity; they are consistent with two 200-km-high plumes of water vapor with line-of-sight column densities of about 10 (super 20) per square meter. Nondetection in November 2012 and in previous HST images from 1999 suggests varying plume activity that might depend on changing surface stresses based on Europa's orbital phases. The plume was present when Europa was near apocenter and was not detected close to its pericenter, in agreement with tidal modeling predictions. JF - Science AU - Roth, Lorenz AU - Saur, Joachim AU - Retherford, Kurt D AU - Strobel, Darrell F AU - Feldman, Paul D AU - McGrath, Melissa A AU - Nimmo, Francis Y1 - 2014/01/10/ PY - 2014 DA - 2014 Jan 10 SP - 171 EP - 174 PB - American Association for the Advancement of Science, Washington, DC VL - 343 IS - 6167 SN - 0036-8075, 0036-8075 KW - icy satellites KW - polar regions KW - imagery KW - Europa Satellite KW - atmosphere KW - water vapor KW - Galilean satellites KW - observations KW - morphology KW - models KW - surface features KW - Hubble Space Telescope KW - satellites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502298270?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Transient+water+vapor+at+Europa%27s+south+pole&rft.au=Roth%2C+Lorenz%3BSaur%2C+Joachim%3BRetherford%2C+Kurt+D%3BStrobel%2C+Darrell+F%3BFeldman%2C+Paul+D%3BMcGrath%2C+Melissa+A%3BNimmo%2C+Francis&rft.aulast=Roth&rft.aufirst=Lorenz&rft.date=2014-01-10&rft.volume=343&rft.issue=6167&rft.spage=171&rft.isbn=&rft.btitle=&rft.title=Science&rft.issn=00368075&rft_id=info:doi/10.1126%2Fscience.1247051 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 - 28 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-02-27 N1 - CODEN - SCIEAS N1 - SubjectsTermNotLitGenreText - atmosphere; Europa Satellite; Galilean satellites; Hubble Space Telescope; icy satellites; imagery; models; morphology; observations; polar regions; satellites; surface features; water vapor DO - http://dx.doi.org/10.1126/science.1247051 ER - TY - NEWS T1 - Enormous Aquifer Discovered Under Greenland Ice Sheet AN - 1476216870 JF - UPI Space Daily AU - Maria-Jose Vinas for NASA Earth Science News Y1 - 2014/01/09/ PY - 2014 DA - 2014 Jan 09 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1476216870?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Enormous+Aquifer+Discovered+Under+Greenland+Ice+Sheet&rft.au=Maria-Jose+Vinas+for+NASA+Earth+Science+News&rft.aulast=Maria-Jose+Vinas+for+NASA+Earth+Science+News&rft.aufirst=&rft.date=2014-01-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-01-10 ER - TY - NEWS T1 - Electric-Blue Clouds Appear over Antarctica AN - 1475233202 JF - UPI Space Daily AU - Dr Tony Phillips for NASA Science News Y1 - 2014/01/08/ PY - 2014 DA - 2014 Jan 08 CY - Washington KW - Aeronautics And Space Flight UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475233202?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apqrl&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=UPI+Space+Daily&rft.atitle=Electric-Blue+Clouds+Appear+over+Antarctica&rft.au=Dr+Tony+Phillips+for+NASA+Science+News&rft.aulast=Dr+Tony+Phillips+for+NASA+Science+News&rft.aufirst=&rft.date=2014-01-08&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=UPI+Space+Daily&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright (c) by United Press International. All Rights Reserved. N1 - Last updated - 2014-01-08 ER - TY - JOUR T1 - Functional group compositions of carbonaceous materials of Hayabusa-returned samples AN - 1863567182; 2017-008143 JF - Annual Meeting of the Meteoritical Society AU - Yabuta, H AU - Uesugi, M AU - Naraoka, H AU - Ito, M AU - Kilcoyne, D AU - Sandford, S A AU - Kitajima, F AU - Mita, H AU - Takano, Y AU - Yada, T AU - Karouji, Y AU - Ishibashi, Y AU - Okada, T AU - Abe, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5263 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - carbonaceous composition KW - Itokawa Asteroid KW - asteroids KW - X-ray spectra KW - samples KW - nitrogen KW - XANES spectra KW - organic compounds KW - Hayabusa Mission KW - carbon KW - composition KW - S-type asteroids KW - spectra KW - ketones KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1863567182?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Functional+group+compositions+of+carbonaceous+materials+of+Hayabusa-returned+samples&rft.au=Yabuta%2C+H%3BUesugi%2C+M%3BNaraoka%2C+H%3BIto%2C+M%3BKilcoyne%2C+D%3BSandford%2C+S+A%3BKitajima%2C+F%3BMita%2C+H%3BTakano%2C+Y%3BYada%2C+T%3BKarouji%2C+Y%3BIshibashi%2C+Y%3BOkada%2C+T%3BAbe%2C+M%3BAnonymous&rft.aulast=Yabuta&rft.aufirst=H&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/5263.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 Aug. 2, 2016 N1 - Last updated - 2017-02-02 N1 - SubjectsTermNotLitGenreText - asteroids; carbon; carbonaceous composition; composition; Hayabusa Mission; Itokawa Asteroid; ketones; nitrogen; organic compounds; S-type asteroids; samples; spectra; X-ray spectra; XANES spectra ER - TY - JOUR T1 - X-ray micro-computed tomography of Apollo samples as a curation technique enabling better research AN - 1863566958; 2017-008150 JF - Annual Meeting of the Meteoritical Society AU - Zeigler, R A AU - Almeida, N V AU - Sykes, D AU - Smith, C L AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5436 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - methods KW - Sample 15205 KW - breccia KW - impactites KW - Moon KW - textures KW - lunar breccia KW - Apollo Program KW - Sample 15404 KW - impact breccia KW - clasts KW - research KW - X ray micro-computed tomography KW - curation KW - Sample 14321 KW - lunar samples KW - X-ray data KW - Sample 60639 KW - metamorphic rocks KW - computed tomography data KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1863566958?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=X-ray+micro-computed+tomography+of+Apollo+samples+as+a+curation+technique+enabling+better+research&rft.au=Zeigler%2C+R+A%3BAlmeida%2C+N+V%3BSykes%2C+D%3BSmith%2C+C+L%3BAnonymous&rft.aulast=Zeigler&rft.aufirst=R&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/5436.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 - 4 N1 - SuppNotes - Accessed on Aug. 3, 2016 N1 - Last updated - 2017-02-02 N1 - SubjectsTermNotLitGenreText - Apollo Program; breccia; clasts; computed tomography data; curation; impact breccia; impactites; lunar breccia; lunar samples; metamorphic rocks; methods; Moon; regolith; research; Sample 14321; Sample 15205; Sample 15404; Sample 60639; textures; X ray micro-computed tomography; X-ray data ER - TY - JOUR T1 - Systematic satellite observations of the impact of aerosols from passive volcanic degassing on local cloud properties AN - 1855318376; 2017-000342 AB - The impact of volcanic emissions, especially from passive degassing and minor explosions, is a source of uncertainty in estimations of aerosol indirect effects. Observations of the impact of volcanic aerosol on clouds contribute to our understanding of both present-day atmospheric properties and of the pre-industrial baseline necessary to assess aerosol radiative forcing. We present systematic measurements over several years at multiple active and inactive volcanic islands in regions of low present-day aerosol burden. The time-averaged indirect aerosol effects within 200 km downwind of island volcanoes are observed using Moderate Resolution Imaging Spectroradiometer (MODIS, 2002-2013) and Advanced Along-Track Scanning Radiometer (AATSR, 2002-2008) data. Retrievals of aerosol and cloud properties at Kilauea (Hawai'i), Yasur (Vanuatu) and Piton de la Fournaise (la Reunion) are rotated about the volcanic vent to be parallel to wind direction, so that upwind and downwind retrievals can be compared. The emissions from all three volcanoes - including those from passive degassing, Strombolian activity and minor explosions - lead to measurably increased aerosol optical depth downwind of the active vent. Average cloud droplet effective radius is lower downwind of the volcano in all cases, with the peak difference ranging from 2-8 mu m at the different volcanoes in different seasons. Estimations of the difference in Top of Atmosphere upward Short Wave flux upwind and downwind of the active volcanoes from NASA's Clouds and the Earth's Radiant Energy System (CERES) suggest a downwind elevation of between 10 and 45 Wm (super -2) at distances of 150-400 km from the volcano, with much greater local (<80 km) effects. Comparison of these observations with cloud properties at isolated islands without degassing or erupting volcanoes suggests that these patterns are not purely orographic in origin. Our observations of unpolluted, isolated marine settings may capture processes similar to those in the pre-industrial marine atmosphere. JF - Atmospheric Chemistry and Physics AU - Ebmeier, S K AU - Sayer, A M AU - Grainger, R G AU - Mather, T A AU - Carboni, E Y1 - 2014 PY - 2014 DA - 2014 SP - 10601 EP - 10618 PB - Copernicus, Katlenburg-Lindau VL - 14 IS - 19 SN - 1680-7316, 1680-7316 KW - Hawaii Island KW - effusion KW - data processing KW - droplets KW - topography KW - radiometers KW - Fiji KW - diurnal variations KW - degassing KW - extrapolation KW - annual variations KW - Samoa KW - global KW - atmosphere KW - effects KW - East Pacific Ocean Islands KW - Yasur KW - satellite methods KW - volcanology KW - measurement KW - Atlantic Ocean Islands KW - Piton de la Fournaise KW - Oceania KW - aerosols KW - Melanesia KW - Mascarene Islands KW - data retrieval KW - seasonal variations KW - optical depth KW - Indian Ocean Islands KW - instruments KW - MODIS KW - United States KW - AATSR KW - Tristan da Cunha KW - mountains KW - sampling KW - Reunion KW - volcanism KW - Vanuatu KW - dimensions KW - Kilauea KW - uncertainty KW - water KW - liquid phase KW - clouds KW - Hawaii County Hawaii KW - Hawaii KW - South Pacific KW - eruptions KW - Pacific Ocean KW - volcanoes KW - temporal distribution KW - Polynesia KW - Ofu-olosega KW - remote sensing KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855318376?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Atmospheric+Chemistry+and+Physics&rft.atitle=Systematic+satellite+observations+of+the+impact+of+aerosols+from+passive+volcanic+degassing+on+local+cloud+properties&rft.au=Ebmeier%2C+S+K%3BSayer%2C+A+M%3BGrainger%2C+R+G%3BMather%2C+T+A%3BCarboni%2C+E&rft.aulast=Ebmeier&rft.aufirst=S&rft.date=2014-01-01&rft.volume=14&rft.issue=19&rft.spage=10601&rft.isbn=&rft.btitle=&rft.title=Atmospheric+Chemistry+and+Physics&rft.issn=16807316&rft_id=info:doi/ L2 - http://www.atmos-chem-phys.net/14/10601/2014/acp-14-10601-2014.pdf http://www.atmospheric-chemistry-and-physics.net/home.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2017-01-01 N1 - Number of references - 78 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2017-01-05 N1 - SubjectsTermNotLitGenreText - AATSR; aerosols; annual variations; Atlantic Ocean Islands; atmosphere; clouds; data processing; data retrieval; degassing; dimensions; diurnal variations; droplets; East Pacific Ocean Islands; effects; effusion; eruptions; extrapolation; Fiji; global; Hawaii; Hawaii County Hawaii; Hawaii Island; Indian Ocean Islands; instruments; Kilauea; liquid phase; Mascarene Islands; measurement; Melanesia; MODIS; mountains; Oceania; Ofu-olosega; optical depth; Pacific Ocean; Piton de la Fournaise; Polynesia; radiometers; remote sensing; Reunion; Samoa; sampling; satellite methods; seasonal variations; South Pacific; temporal distribution; topography; Tristan da Cunha; uncertainty; United States; Vanuatu; volcanism; volcanoes; volcanology; water; Yasur ER - TY - JOUR T1 - Optical, microphysical and compositional properties of the Eyjafjallajokull volcanic ash AN - 1855317881; 2017-000343 AB - Better characterization of the optical properties of aerosol particles are an essential step to improve atmospheric models and satellite remote sensing, reduce uncertainties in predicting particulate transport, and estimate aerosol forcing and climate change. Even natural aerosols such as mineral dust or particles from volcanic eruptions require better characterization in order to define the background conditions from which anthropogenic perturbations emerge. We present a detailed laboratorial study where the spectral optical properties of the ash from the April-May (2010) Eyjafjallajokull volcanic eruption were derived over a broad spectral range, from ultra-violet (UV) to near-infrared (NIR) wavelengths. Samples of the volcanic ash taken on the ground in the vicinity of the volcano were sieved, re-suspended, and collected on filters to separate particle sizes into fine and mixed (coarse and fine) modes. We derived the spectral mass absorption efficiency alpha (sub abs) [m (super 2) g (super -1) ] for fine and mixed modes particles in the wavelength range from 300 to 2500 nm from measurements of optical reflectance. We retrieved the imaginary part of the complex refractive index Im(m) from alpha (sub abs) , using Mie-Lorenz and T-matrix theories and considering the size distribution of particles obtained by scanning electron microscopy (SEM), and the grain density of the volcanic ash measured as rho = 2.16 + or - 0.13 g cm (super -3) . Im(m) was found to vary from 0.001 to 0.005 in the measured wavelength range. The dependence of the retrieval on the shape considered for the particles were found to be small and within the uncertainties estimated in our calculation. Fine and mixed modes were also analyzed by X-ray fluorescence, exhibiting distinct elemental composition supporting the optical differences we found between the modes. This is a comprehensive and consistent characterization of spectral absorption and imaginary refractive index, density, size, shape and elemental composition of volcanic ash, which will help constrain assumptions of ash particles in models and remote sensing, thereby narrowing uncertainties in representing these particles both for short-term regional forecasts and long-term climate change. JF - Atmospheric Chemistry and Physics AU - Rocha-Lima, A AU - Martins, J V AU - Remer, L A AU - Krotkov, N A AU - Tabacniks, M H AU - Ben-Ami, Y AU - Artaxo, P Y1 - 2014 PY - 2014 DA - 2014 SP - 10649 EP - 10661 PB - Copernicus, Katlenburg-Lindau VL - 14 IS - 19 SN - 1680-7316, 1680-7316 KW - power law KW - Eyjafjallajokull KW - density KW - Europe KW - laboratory studies KW - absorption KW - size distribution KW - sampling KW - volcanism KW - X-ray fluorescence spectra KW - spectra KW - volcanic ash KW - chemical composition KW - concentration KW - experimental studies KW - Western Europe KW - grain size KW - shape analysis KW - suspension KW - electron microscopy data KW - samplers KW - Vik Iceland KW - physical properties KW - optical properties KW - eruptions KW - volcanoes KW - aerosols KW - Iceland KW - reflectance KW - SEM data KW - refractive index KW - particles KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855317881?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Atmospheric+Chemistry+and+Physics&rft.atitle=Optical%2C+microphysical+and+compositional+properties+of+the+Eyjafjallajokull+volcanic+ash&rft.au=Rocha-Lima%2C+A%3BMartins%2C+J+V%3BRemer%2C+L+A%3BKrotkov%2C+N+A%3BTabacniks%2C+M+H%3BBen-Ami%2C+Y%3BArtaxo%2C+P&rft.aulast=Rocha-Lima&rft.aufirst=A&rft.date=2014-01-01&rft.volume=14&rft.issue=19&rft.spage=10649&rft.isbn=&rft.btitle=&rft.title=Atmospheric+Chemistry+and+Physics&rft.issn=16807316&rft_id=info:doi/ L2 - http://www.atmos-chem-phys.net/14/10649/2014/acp-14-10649-2014.pdf http://www.atmospheric-chemistry-and-physics.net/home.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2017-01-01 N1 - Number of references - 57 N1 - Document feature - illus. N1 - Last updated - 2017-01-05 N1 - SubjectsTermNotLitGenreText - absorption; aerosols; chemical composition; concentration; density; electron microscopy data; eruptions; Europe; experimental studies; Eyjafjallajokull; grain size; Iceland; laboratory studies; optical properties; particles; physical properties; power law; reflectance; refractive index; samplers; sampling; SEM data; shape analysis; size distribution; spectra; suspension; Vik Iceland; volcanic ash; volcanism; volcanoes; Western Europe; X-ray fluorescence spectra ER - TY - JOUR T1 - Clay and magnetite formation at Yellowknife Bay, Mars AN - 1849311032; 2016-109000 JF - Annual Meeting of the Meteoritical Society AU - Bridges, J C AU - Schwenzer, S P AU - Leveille, R AU - Westall, F AU - Wiens, R C AU - Mangold, N AU - Bristow, T AU - Edwards, P AU - Berger, G AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5344 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - olivine group KW - Mars KW - solution KW - Gale Crater KW - sedimentary rocks KW - olivine KW - Curiosity Rover KW - orthosilicates KW - oxides KW - heterogeneity KW - Yellowknife Bay KW - mudstone KW - secondary minerals KW - amorphous materials KW - saponite KW - Sheepbed Mudstone KW - clay minerals KW - terrestrial planets KW - nesosilicates KW - models KW - planets KW - diagenesis KW - Mars Science Laboratory KW - sheet silicates KW - clastic rocks KW - pore water KW - magnetite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849311032?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Clay+and+magnetite+formation+at+Yellowknife+Bay%2C+Mars&rft.au=Bridges%2C+J+C%3BSchwenzer%2C+S+P%3BLeveille%2C+R%3BWestall%2C+F%3BWiens%2C+R+C%3BMangold%2C+N%3BBristow%2C+T%3BEdwards%2C+P%3BBerger%2C+G%3BAnonymous&rft.aulast=Bridges&rft.aufirst=J&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5344.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 8 N1 - SuppNotes - Accessed on May 13, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - amorphous materials; clastic rocks; clay minerals; Curiosity Rover; diagenesis; Gale Crater; heterogeneity; magnetite; Mars; Mars Science Laboratory; models; mudstone; nesosilicates; olivine; olivine group; orthosilicates; oxides; planets; pore water; saponite; secondary minerals; sedimentary rocks; Sheepbed Mudstone; sheet silicates; silicates; solution; terrestrial planets; Yellowknife Bay ER - TY - JOUR T1 - Using meteorites to find the age of the Moon-forming event AN - 1849310997; 2016-108993 JF - Annual Meeting of the Meteoritical Society AU - Bottke, W F AU - Swindle, T D AU - Marchi, S AU - Scott, Edward R D AU - Vokrouhlicky, D AU - Weirich, J R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5360 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - Ar/Ar KW - ordinary chondrites KW - stony meteorites KW - asteroids KW - Moon KW - parent bodies KW - impacts KW - metamorphism KW - ejecta KW - achondrites KW - melts KW - early solar system KW - meteorites KW - impact melts KW - giant impact hypothesis KW - dates KW - absolute age KW - velocity KW - thermochronology KW - eucrite KW - chondrites KW - main-belt asteroids KW - shock metamorphism KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310997?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Using+meteorites+to+find+the+age+of+the+Moon-forming+event&rft.au=Bottke%2C+W+F%3BSwindle%2C+T+D%3BMarchi%2C+S%3BScott%2C+Edward+R+D%3BVokrouhlicky%2C+D%3BWeirich%2C+J+R%3BAnonymous&rft.aulast=Bottke&rft.aufirst=W&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/5360.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 May 11, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; Ar/Ar; asteroids; chondrites; dates; early solar system; ejecta; eucrite; giant impact hypothesis; impact melts; impacts; main-belt asteroids; melts; metamorphism; meteorites; Moon; ordinary chondrites; parent bodies; shock metamorphism; stony meteorites; thermochronology; velocity ER - TY - JOUR T1 - Experimentally shocked and altered basalt; laboratory analogs for calibration of Mars remote sensing and in situ data AN - 1849310993; 2016-108973 JF - Annual Meeting of the Meteoritical Society AU - Bell, M S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5323 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - United States KW - alteration KW - Hawaii Island KW - volcanic rocks KW - igneous rocks KW - Mauna Kea KW - Mars KW - laboratory studies KW - basalts KW - acidic composition KW - basaltic composition KW - experimental studies KW - pressure KW - Hawaii County Hawaii KW - Hawaii KW - East Pacific Ocean Islands KW - metamorphism KW - terrestrial planets KW - aqueous alteration KW - pyroclastics KW - planets KW - natural analogs KW - Oceania KW - Polynesia KW - shock metamorphism KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310993?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Experimentally+shocked+and+altered+basalt%3B+laboratory+analogs+for+calibration+of+Mars+remote+sensing+and+in+situ+data&rft.au=Bell%2C+M+S%3BAnonymous&rft.aulast=Bell&rft.aufirst=M&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5323.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - SuppNotes - Accessed on May 6, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - acidic composition; alteration; aqueous alteration; basaltic composition; basalts; East Pacific Ocean Islands; experimental studies; Hawaii; Hawaii County Hawaii; Hawaii Island; igneous rocks; laboratory studies; Mars; Mauna Kea; metamorphism; natural analogs; Oceania; planets; Polynesia; pressure; pyroclastics; shock metamorphism; terrestrial planets; United States; volcanic rocks ER - TY - JOUR T1 - High-resolution imaged-based 3D reconstruction combined with X-ray CT data enables comprehensive non-destructive documentation and targeted research of astromaterials AN - 1849310942; 2016-108987 JF - Annual Meeting of the Meteoritical Society AU - Blumenfeld, E H AU - Evans, C A AU - Oshel, E R AU - Liddle, D A AU - Beaulieu, K AU - Zeigler, R A AU - Righter, K AU - Hanna, R D AU - Ketcham, R A AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5391 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - meteorites KW - curation KW - lunar samples KW - imagery KW - X-ray data KW - three-dimensional models KW - reconstruction KW - computed tomography data KW - non-destructive methods KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310942?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=High-resolution+imaged-based+3D+reconstruction+combined+with+X-ray+CT+data+enables+comprehensive+non-destructive+documentation+and+targeted+research+of+astromaterials&rft.au=Blumenfeld%2C+E+H%3BEvans%2C+C+A%3BOshel%2C+E+R%3BLiddle%2C+D+A%3BBeaulieu%2C+K%3BZeigler%2C+R+A%3BRighter%2C+K%3BHanna%2C+R+D%3BKetcham%2C+R+A%3BAnonymous&rft.aulast=Blumenfeld&rft.aufirst=E&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/5391.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 - 3 N1 - SuppNotes - Accessed May 10, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - computed tomography data; curation; imagery; lunar samples; meteorites; non-destructive methods; reconstruction; three-dimensional models; X-ray data ER - TY - JOUR T1 - Mass spectum imaging of organics injected into Stardust aerogel by cometary impacts AN - 1849310926; 2016-109017 JF - Annual Meeting of the Meteoritical Society AU - Clemett, S J AU - Nakamura-Messenger, K AU - Messenger, S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5419 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - ammonium KW - vacuum ultraviolet KW - particle tracks KW - imagery KW - Stardust Mission KW - aliphatic hydrocarbons KW - mass spectra KW - impacts KW - volatiles KW - organic compounds KW - microprobe two-step laser desorption KW - comets KW - photoionization KW - hypervelocity impacts KW - hydrocarbons KW - aerogel KW - spectra KW - aromatic hydrocarbons KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310926?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mass+spectum+imaging+of+organics+injected+into+Stardust+aerogel+by+cometary+impacts&rft.au=Clemett%2C+S+J%3BNakamura-Messenger%2C+K%3BMessenger%2C+S%3BAnonymous&rft.aulast=Clemett&rft.aufirst=S&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/5419.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 - 9 N1 - SuppNotes - Accessed on May 18, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - aerogel; aliphatic hydrocarbons; ammonium; aromatic hydrocarbons; comets; hydrocarbons; hypervelocity impacts; imagery; impacts; mass spectra; microprobe two-step laser desorption; organic compounds; particle tracks; photoionization; spectra; Stardust Mission; vacuum ultraviolet; volatiles ER - TY - JOUR T1 - A classification table for achondrites (2) AN - 1849310759; 2016-109014 JF - Annual Meeting of the Meteoritical Society AU - Chennaoui-Aoudjehane, H AU - Larouci, N AU - Jambon, A AU - Mittlefehldt, D W AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5173 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - stony irons KW - lunar meteorites KW - stony meteorites KW - textures KW - HED meteorites KW - angrite KW - aubrite KW - ureilite KW - achondrites KW - magnetic properties KW - meteorites KW - mineral composition KW - magnetic susceptibility KW - classification KW - mesosiderite KW - brachinite KW - geochemistry KW - pallasite KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310759?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+classification+table+for+achondrites+%282%29&rft.au=Chennaoui-Aoudjehane%2C+H%3BLarouci%2C+N%3BJambon%2C+A%3BMittlefehldt%2C+D+W%3BAnonymous&rft.aulast=Chennaoui-Aoudjehane&rft.aufirst=H&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/5173.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - SuppNotes - Accessed on May 17, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - achondrites; angrite; aubrite; brachinite; classification; geochemistry; HED meteorites; lunar meteorites; magnetic properties; magnetic susceptibility; mesosiderite; meteorites; mineral composition; pallasite; stony irons; stony meteorites; textures; ureilite ER - TY - JOUR T1 - New meteorite type NWA 8159 augite basalt; specimen from a previously unsampled location on Mars? AN - 1849310615; 2016-108952 JF - Annual Meeting of the Meteoritical Society AU - Agee, C B AU - Muttik, N AU - Ziegler, K AU - Walton, E L AU - Herd, C D K AU - McCubbin, F M AU - Santos, A R AU - Burger, P V AU - Simon, Justin I AU - Peters, T J AU - Tappa, M J AU - Sanborn, M E AU - Yin, Q Z AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5397 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - Northwest Africa Meteorites KW - volcanic rocks KW - stony meteorites KW - oxygen KW - Martian meteorites KW - igneous rocks KW - augite KW - Mars KW - fugacity KW - SNC Meteorites KW - meteorites KW - pyroxene group KW - clinopyroxene KW - Amazonian KW - basalts KW - rare earths KW - heterogeneity KW - chain silicates KW - NWA 8159 KW - achondrites KW - terrestrial planets 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/1849310615?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+meteorite+type+NWA+8159+augite+basalt%3B+specimen+from+a+previously+unsampled+location+on+Mars%3F&rft.au=Agee%2C+C+B%3BMuttik%2C+N%3BZiegler%2C+K%3BWalton%2C+E+L%3BHerd%2C+C+D+K%3BMcCubbin%2C+F+M%3BSantos%2C+A+R%3BBurger%2C+P+V%3BSimon%2C+Justin+I%3BPeters%2C+T+J%3BTappa%2C+M+J%3BSanborn%2C+M+E%3BYin%2C+Q+Z%3BAnonymous&rft.aulast=Agee&rft.aufirst=C&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/5397.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 - 3 N1 - SuppNotes - Accessed on May 3, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - achondrites; Amazonian; augite; basalts; chain silicates; clinopyroxene; fugacity; heterogeneity; igneous rocks; Mars; Martian meteorites; metals; meteorites; Northwest Africa Meteorites; NWA 8159; oxygen; planets; pyroxene group; rare earths; shergottite; silicates; SNC Meteorites; stony meteorites; terrestrial planets; volcanic rocks ER - TY - JOUR T1 - Towards a general equation for the survival of microbes transferred between solar system bodies AN - 1840622151; 2016-098266 JF - Annual Meeting of the Meteoritical Society AU - Fries, Marc D AU - Steele, A AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5434 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - mass KW - solar system KW - meteorites KW - transport KW - astrobiology KW - equations KW - ejecta KW - microorganisms KW - adaptation KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840622151?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Towards+a+general+equation+for+the+survival+of+microbes+transferred+between+solar+system+bodies&rft.au=Fries%2C+Marc+D%3BSteele%2C+A%3BAnonymous&rft.aulast=Fries&rft.aufirst=Marc&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/5434.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 - 4 N1 - SuppNotes - Accessed on May 27, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - adaptation; astrobiology; ejecta; equations; mass; meteorites; microorganisms; solar system; transport ER - TY - JOUR T1 - Don Juan Basin, Wright Valley, Antarctica; model for surface processes on Mars AN - 1840622115; 2016-098253 JF - Annual Meeting of the Meteoritical Society AU - Englert, P AU - Bishop, J L AU - Gibson, E K AU - Patel, S AU - Koeberl, C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5206 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - calcium KW - calcium chloride KW - Mars KW - Don Juan Pond KW - cores KW - sedimentary rocks KW - Ferrar Group KW - Wright Valley KW - saline composition KW - soils KW - chemical weathering KW - alkaline earth metals KW - chemically precipitated rocks KW - Jurassic KW - solutes KW - evaporites KW - weathering KW - Mesozoic KW - depth KW - terrestrial planets KW - models KW - provenance KW - ponds KW - planets KW - Antarctica KW - metals KW - McMurdo dry valleys KW - Victoria Land KW - reflectance KW - 06A:Sedimentary petrology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840622115?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Don+Juan+Basin%2C+Wright+Valley%2C+Antarctica%3B+model+for+surface+processes+on+Mars&rft.au=Englert%2C+P%3BBishop%2C+J+L%3BGibson%2C+E+K%3BPatel%2C+S%3BKoeberl%2C+C%3BAnonymous&rft.aulast=Englert&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/5206.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - SuppNotes - Accessed on May 26, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Antarctica; calcium; calcium chloride; chemical weathering; chemically precipitated rocks; cores; depth; Don Juan Pond; evaporites; Ferrar Group; Jurassic; Mars; McMurdo dry valleys; Mesozoic; metals; models; planets; ponds; provenance; reflectance; saline composition; sedimentary rocks; soils; solutes; terrestrial planets; Victoria Land; weathering; Wright Valley ER - TY - JOUR T1 - Diversity in C-XANES spectra obtained from carbonaceous solid inclusions from Monahans halite AN - 1840622060; 2016-098342 JF - Annual Meeting of the Meteoritical Society AU - Kebukawa, K AU - Zolensky, M E AU - Fries, Marc D AU - Kilcoyne, A L D AU - Rahman, Z AU - Cody, G D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5141 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - halides KW - carbonaceous composition KW - ordinary chondrites KW - stony meteorites KW - H chondrites KW - X-ray spectra KW - halite KW - XANES spectra KW - solid phase KW - meteorites KW - organic compounds KW - Monahans Meteorite KW - carbon KW - inclusions KW - chlorides KW - spectra KW - organic carbon KW - heterogeneity KW - chondrites KW - carbonates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840622060?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Diversity+in+C-XANES+spectra+obtained+from+carbonaceous+solid+inclusions+from+Monahans+halite&rft.au=Kebukawa%2C+K%3BZolensky%2C+M+E%3BFries%2C+Marc+D%3BKilcoyne%2C+A+L+D%3BRahman%2C+Z%3BCody%2C+G+D%3BAnonymous&rft.aulast=Kebukawa&rft.aufirst=K&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/5141.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 - 3 N1 - SuppNotes - Accessed on June 15, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - carbon; carbonaceous composition; carbonates; chlorides; chondrites; H chondrites; halides; halite; heterogeneity; inclusions; meteorites; Monahans Meteorite; ordinary chondrites; organic carbon; organic compounds; solid phase; spectra; stony meteorites; X-ray spectra; XANES spectra ER - TY - JOUR T1 - A FIB/TEM/NanoSIMS study of a Wark-Lovering rim on an Allende CAI AN - 1840621891; 2016-098344 JF - Annual Meeting of the Meteoritical Society AU - Keller, Lindsay P AU - Needham, A W AU - Messenger, S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5428 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - calcium-aluminum inclusions KW - microstructure KW - spinel KW - mass spectra KW - electron microscopy data KW - carbonaceous chondrites KW - CV chondrites KW - Wark-Lovering rim KW - TEM data KW - Allende Meteorite KW - solar nebula KW - meteorites KW - focused ion beam KW - inclusions KW - petrography KW - oxides KW - NanoSIMS KW - spectra KW - chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621891?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+FIB%2FTEM%2FNanoSIMS+study+of+a+Wark-Lovering+rim+on+an+Allende+CAI&rft.au=Keller%2C+Lindsay+P%3BNeedham%2C+A+W%3BMessenger%2C+S%3BAnonymous&rft.aulast=Keller&rft.aufirst=Lindsay&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/5428.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 - 4 N1 - SuppNotes - Accessed on June 16, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - Allende Meteorite; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; CV chondrites; electron microscopy data; focused ion beam; inclusions; ion probe data; isotopes; mass spectra; meteorites; microstructure; NanoSIMS; oxides; oxygen; petrography; solar nebula; spectra; spinel; stony meteorites; TEM data; Wark-Lovering rim ER - TY - JOUR T1 - Correlations between surficial sulfur and a crustal assimilation signature in Martian shergottites AN - 1840621868; 2016-098333 JF - Annual Meeting of the Meteoritical Society AU - Jones, J H AU - Franz, H B AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5076 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - stony meteorites KW - isotopes KW - Martian meteorites KW - isotope ratios KW - Mars KW - achondrites KW - stable isotopes KW - terrestrial planets KW - SNC Meteorites KW - assimilation KW - planets KW - meteorites KW - lanthanum KW - shergottite KW - metals KW - magmas KW - sulfur KW - samarium KW - S-33/S-32 KW - rare earths KW - crust KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621868?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Correlations+between+surficial+sulfur+and+a+crustal+assimilation+signature+in+Martian+shergottites&rft.au=Jones%2C+J+H%3BFranz%2C+H+B%3BAnonymous&rft.aulast=Jones&rft.aufirst=J&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5076.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 - 1 N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 13, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - achondrites; assimilation; crust; isotope ratios; isotopes; lanthanum; magmas; Mars; Martian meteorites; metals; meteorites; planets; rare earths; S-33/S-32; samarium; shergottite; SNC Meteorites; stable isotopes; stony meteorites; sulfur; terrestrial planets ER - TY - JOUR T1 - Microstructures of hibonite from an ALHA 77307 (CO3.0) CAI; evidence for evaporative loss of calcium AN - 1840621402; 2016-098298 JF - Annual Meeting of the Meteoritical Society AU - Han, Jangmi AU - Brearley, Adrian J AU - Keller, Lindsay P AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5440 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - calcium KW - alkaline earth metals KW - magnesium KW - stony meteorites KW - calcium-aluminum inclusions KW - microstructure KW - electron microscopy data KW - hibonite KW - carbonaceous chondrites KW - defects KW - X-ray spectra KW - TEM data KW - EDS spectra KW - CO chondrites KW - meteorites KW - evaporation KW - Allan Hills Meteorites KW - metals KW - inclusions KW - ALHA 77307 KW - oxides KW - spectra KW - chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621402?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Microstructures+of+hibonite+from+an+ALHA+77307+%28CO3.0%29+CAI%3B+evidence+for+evaporative+loss+of+calcium&rft.au=Han%2C+Jangmi%3BBrearley%2C+Adrian+J%3BKeller%2C+Lindsay+P%3BAnonymous&rft.aulast=Han&rft.aufirst=Jangmi&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/5440.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - SuppNotes - Accessed on June 7, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - ALHA 77307; alkaline earth metals; Allan Hills Meteorites; calcium; calcium-aluminum inclusions; carbonaceous chondrites; chondrites; CO chondrites; defects; EDS spectra; electron microscopy data; evaporation; hibonite; inclusions; magnesium; metals; meteorites; microstructure; oxides; spectra; stony meteorites; TEM data; X-ray spectra ER - TY - JOUR T1 - D/H and water sources in Tissint AN - 1840621112; 2016-098296 JF - Annual Meeting of the Meteoritical Society AU - Hallis, L J AU - Huss, G R AU - Nagashima, K AU - Taylor, G J AU - Stoeffler, D AU - Smith, C L AU - Lee, M R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5149 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - stony meteorites KW - ion probe data KW - isotopes KW - Martian meteorites KW - mass spectra KW - Mars KW - stable isotopes KW - SNC Meteorites KW - meteorites KW - polymorphism KW - water content KW - spectra KW - degassing KW - water KW - pressure KW - isotope ratios KW - metamorphism KW - high pressure KW - achondrites KW - terrestrial planets KW - planets KW - Tissint Meteorite KW - shergottite KW - D/H KW - magmas KW - hydrogen KW - shock metamorphism KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621112?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=D%2FH+and+water+sources+in+Tissint&rft.au=Hallis%2C+L+J%3BHuss%2C+G+R%3BNagashima%2C+K%3BTaylor%2C+G+J%3BStoeffler%2C+D%3BSmith%2C+C+L%3BLee%2C+M+R%3BAnonymous&rft.aulast=Hallis&rft.aufirst=L&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/5149.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 - 9 N1 - SuppNotes - Accessed on June 7, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - achondrites; D/H; degassing; high pressure; hydrogen; ion probe data; isotope ratios; isotopes; magmas; Mars; Martian meteorites; mass spectra; metamorphism; meteorites; planets; polymorphism; pressure; shergottite; shock metamorphism; SNC Meteorites; spectra; stable isotopes; stony meteorites; terrestrial planets; Tissint Meteorite; water; water content ER - TY - JOUR T1 - Space weathering of olivine in lunar soils; a comparison to Itokawa regolith samples AN - 1840620278; 2016-098343 JF - Annual Meeting of the Meteoritical Society AU - Keller, Lindsay P AU - Berger, E L AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5088 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - Itokawa Asteroid KW - asteroids KW - Moon KW - solar wind KW - microstructure KW - olivine group KW - impacts KW - weathering KW - Sample 71501 KW - nesosilicates KW - space weathering KW - hypervelocity impacts KW - Sample 10084 KW - Hayabusa Mission KW - olivine KW - Sample 71061 KW - orthosilicates KW - S-type asteroids KW - regolith KW - lunar soils KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840620278?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Space+weathering+of+olivine+in+lunar+soils%3B+a+comparison+to+Itokawa+regolith+samples&rft.au=Keller%2C+Lindsay+P%3BBerger%2C+E+L%3BAnonymous&rft.aulast=Keller&rft.aufirst=Lindsay&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/5088.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 - 3 N1 - SuppNotes - Accessed on June 15, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - asteroids; Hayabusa Mission; hypervelocity impacts; impacts; Itokawa Asteroid; lunar soils; microstructure; Moon; nesosilicates; olivine; olivine group; orthosilicates; regolith; S-type asteroids; Sample 10084; Sample 71061; Sample 71501; silicates; solar wind; space weathering; weathering ER - TY - JOUR T1 - Ejecta from targets strong and weak; experimental measurements of strength controlled and strengthless craters AN - 1840620061; 2016-098306 JF - Annual Meeting of the Meteoritical Society AU - Hermalyn, B AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5445 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - cratering KW - experimental studies KW - impact features KW - strength KW - video methods KW - photogrammetry KW - ejecta KW - measurement KW - gravity field KW - scale models KW - transient phenomena KW - oblique orientation KW - velocity KW - impact craters KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840620061?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Ejecta+from+targets+strong+and+weak%3B+experimental+measurements+of+strength+controlled+and+strengthless+craters&rft.au=Hermalyn%2C+B%3BAnonymous&rft.aulast=Hermalyn&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/5445.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 - 3 N1 - SuppNotes - Accessed on June 8, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - cratering; ejecta; experimental studies; gravity field; impact craters; impact features; measurement; oblique orientation; photogrammetry; scale models; strength; transient phenomena; velocity; video methods ER - TY - JOUR T1 - Impact-induced chondrule deformation and aqueous alteration of CM2 Murchison AN - 1840619674; 2016-098299 JF - Annual Meeting of the Meteoritical Society AU - Hanna, Romy D AU - Zolensky, M E AU - Ketcham, R A AU - Behr, W M AU - Martinez, J E AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5094 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - serpentine KW - stony meteorites KW - microstructure KW - olivine group KW - Murchison Meteorite KW - meteorites KW - fractures KW - pyroxene group KW - clinopyroxene KW - serpentine group KW - orthosilicates KW - chondrites KW - chain silicates KW - lineation KW - carbonaceous chondrites KW - impacts KW - deformation KW - forsterite KW - nesosilicates KW - aqueous alteration KW - clinoenstatite KW - tochilinite KW - chondrules KW - optical extinction KW - sheet silicates KW - foliation KW - CM chondrites KW - sulfides KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840619674?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Impact-induced+chondrule+deformation+and+aqueous+alteration+of+CM2+Murchison&rft.au=Hanna%2C+Romy+D%3BZolensky%2C+M+E%3BKetcham%2C+R+A%3BBehr%2C+W+M%3BMartinez%2C+J+E%3BAnonymous&rft.aulast=Hanna&rft.aufirst=Romy&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/5094.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 8 N1 - SuppNotes - Accessed on June 7, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - aqueous alteration; carbonaceous chondrites; chain silicates; chondrites; chondrules; clinoenstatite; clinopyroxene; CM chondrites; deformation; foliation; forsterite; fractures; impacts; lineation; meteorites; microstructure; Murchison Meteorite; nesosilicates; olivine group; optical extinction; orthosilicates; pyroxene group; serpentine; serpentine group; sheet silicates; silicates; stony meteorites; sulfides; tochilinite ER - TY - JOUR T1 - Worldwide weather radar imagery may allow substantial increase in meteorite fall recovery AN - 1840619510; 2016-098267 JF - Annual Meeting of the Meteoritical Society AU - Fries, Marc D AU - Matson, Robert AU - Schaefer, Jacob AU - Fries, Jeffrey AU - Hankey, Mike AU - Anderson, Lindsay AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5443 PB - Meteoritical Society, [varies] VL - 77 SN - 0735-049X, 0735-049X KW - United States KW - networks KW - meteorites KW - imagery KW - NEXRAD KW - global KW - radar methods KW - recovery KW - meteorite falls KW - Nest-Generation Radar KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840619510?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Worldwide+weather+radar+imagery+may+allow+substantial+increase+in+meteorite+fall+recovery&rft.au=Fries%2C+Marc+D%3BMatson%2C+Robert%3BSchaefer%2C+Jacob%3BFries%2C+Jeffrey%3BHankey%2C+Mike%3BAnderson%2C+Lindsay%3BAnonymous&rft.aulast=Fries&rft.aufirst=Marc&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/5443.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 - 3 N1 - SuppNotes - Accessed on May 31, 2016 N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - global; imagery; meteorite falls; meteorites; Nest-Generation Radar; networks; NEXRAD; radar methods; recovery; United States ER - TY - JOUR T1 - Working with clouds and supercomputers, public and private AN - 1832726728; 2016-088544 JF - Open-File Report - U. S. Geological Survey AU - Beyer, Ross A AU - Alexandrov, Oleg AU - Moratto, Zachary AU - Nefian, Ara V AU - Scharff, Ted AU - Gaddis, Lisa R AU - Hare, Trent M Y1 - 2014 PY - 2014 DA - 2014 SP - 35 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - government agencies KW - data processing KW - cloud data storage KW - information management KW - data management KW - supercomputers KW - computer programs KW - NASA KW - planetology KW - applications KW - data storage KW - USGS KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832726728?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Working+with+clouds+and+supercomputers%2C+public+and+private&rft.au=Beyer%2C+Ross+A%3BAlexandrov%2C+Oleg%3BMoratto%2C+Zachary%3BNefian%2C+Ara+V%3BScharff%2C+Ted%3BGaddis%2C+Lisa+R%3BHare%2C+Trent+M&rft.aulast=Beyer&rft.aufirst=Ross&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=35&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/ L2 - http://pubs.usgs.gov/of/2014/1056/ https://pubs.er.usgs.gov/browse/usgs-publications/OFR LA - English DB - GeoRef N1 - Conference title - Planetary data workshop N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - VA N1 - SuppNotes - Accessed on April 23, 2014 N1 - Last updated - 2016-10-27 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - applications; cloud data storage; computer programs; data management; data processing; data storage; government agencies; information management; NASA; planetology; supercomputers; USGS ER - TY - JOUR T1 - Multiple view correlator for orbital images AN - 1832726721; 2016-088573 JF - Open-File Report - U. S. Geological Survey AU - Kim, T AU - Husmann, K AU - Gaddis, Lisa R AU - Hare, Trent M AU - Beyer, Ross A Y1 - 2014 PY - 2014 DA - 2014 SP - 93 EP - 96 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - imagery KW - Lunar Mapping and Modeling Project KW - three-dimensional models KW - Moon KW - multiple view correlator KW - government agencies KW - data processing KW - space photography KW - mapping KW - Apollo Program KW - digital terrain models KW - computer programs KW - NASA KW - orbital observations KW - Apollo 15 KW - USGS KW - image analysis KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832726721?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Multiple+view+correlator+for+orbital+images&rft.au=Kim%2C+T%3BHusmann%2C+K%3BGaddis%2C+Lisa+R%3BHare%2C+Trent+M%3BBeyer%2C+Ross+A&rft.aulast=Kim&rft.aufirst=T&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=93&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/ L2 - http://pubs.usgs.gov/of/2014/1056/ https://pubs.er.usgs.gov/browse/usgs-publications/OFR LA - English DB - GeoRef N1 - Conference title - Planetary data workshop N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 4 N1 - PubXState - VA N1 - Document feature - illus. incl. sketch maps N1 - SuppNotes - Accessed on April 29, 2014 N1 - Last updated - 2016-10-27 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - Apollo 15; Apollo Program; computer programs; data processing; digital terrain models; government agencies; image analysis; imagery; Lunar Mapping and Modeling Project; mapping; Moon; multiple view correlator; NASA; orbital observations; remote sensing; space photography; three-dimensional models; USGS ER - TY - JOUR T1 - Planetary nomenclature; a review AN - 1832726647; 2016-088613 JF - Open-File Report - U. S. Geological Survey AU - Blue, J AU - Gaddis, Lisa R AU - Schulz, R AU - Aksnes, K AU - Burba, G AU - Consolmagno, G AU - Lopes, R AU - Masson, P AU - McGrath, M AU - Meech, K AU - Smith, B A AU - Williams, G AU - Wood, C AU - Hare, Trent M AU - Beyer, Ross A Y1 - 2014 PY - 2014 DA - 2014 SP - 193 EP - 196 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - planets KW - nomenclature KW - asteroids KW - data processing KW - data bases KW - planetology KW - standardization KW - satellites KW - USGS KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832726647?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Planetary+nomenclature%3B+a+review&rft.au=Blue%2C+J%3BGaddis%2C+Lisa+R%3BSchulz%2C+R%3BAksnes%2C+K%3BBurba%2C+G%3BConsolmagno%2C+G%3BLopes%2C+R%3BMasson%2C+P%3BMcGrath%2C+M%3BMeech%2C+K%3BSmith%2C+B+A%3BWilliams%2C+G%3BWood%2C+C%3BHare%2C+Trent+M%3BBeyer%2C+Ross+A&rft.aulast=Blue&rft.aufirst=J&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=193&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/ L2 - https://pubs.er.usgs.gov/browse/usgs-publications/OFR LA - English DB - GeoRef N1 - Conference title - Planetary data workshop N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 2 N1 - PubXState - VA N1 - Document feature - 1 table N1 - Last updated - 2016-10-27 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - asteroids; data bases; data processing; nomenclature; planetology; planets; satellites; standardization; USGS ER - TY - JOUR T1 - Trajectory Browser website AN - 1832726562; 2016-088557 JF - Open-File Report - U. S. Geological Survey AU - Foster, Cyrus AU - Gaddis, Lisa R AU - Hare, Trent M AU - Beyer, Ross A Y1 - 2014 PY - 2014 DA - 2014 SP - 57 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - orbits KW - government agencies KW - data processing KW - World Wide Web KW - exploration KW - computer programs KW - NASA KW - Trajectory Browser KW - planetology KW - applications KW - computer networks KW - USGS KW - Internet KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832726562?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Trajectory+Browser+website&rft.au=Foster%2C+Cyrus%3BGaddis%2C+Lisa+R%3BHare%2C+Trent+M%3BBeyer%2C+Ross+A&rft.aulast=Foster&rft.aufirst=Cyrus&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=57&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/ L2 - http://pubs.usgs.gov/of/2014/1056/ https://pubs.er.usgs.gov/browse/usgs-publications/OFR LA - English DB - GeoRef N1 - Conference title - Planetary data workshop N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - VA N1 - Document feature - illus. N1 - SuppNotes - Accessed on April 24, 2014 N1 - Last updated - 2016-10-27 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - applications; computer networks; computer programs; data processing; exploration; government agencies; Internet; NASA; orbits; planetology; Trajectory Browser; USGS; World Wide Web ER - TY - JOUR T1 - Lunar albedo reconstruction from Apollo Metric Camera imagery AN - 1832726495; 2016-088587 JF - Open-File Report - U. S. Geological Survey AU - Nefian, Ara V AU - Alexandrov, Oleg AU - Moratto, Zack AU - Kim, Taemin AU - Beyer, Ross A AU - Fong, Terry AU - Gaddis, Lisa R AU - Hare, Trent M Y1 - 2014 PY - 2014 DA - 2014 SP - 132 EP - 134 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - albedo KW - imagery KW - stereographic projection KW - Moon KW - mathematical models KW - Apollo Program KW - digital terrain models KW - Apollo Metric Camera KW - mathematical methods KW - reconstruction KW - orbital observations KW - Apollo 15 KW - USGS KW - Apollo 17 KW - Apollo 16 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832726495?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Lunar+albedo+reconstruction+from+Apollo+Metric+Camera+imagery&rft.au=Nefian%2C+Ara+V%3BAlexandrov%2C+Oleg%3BMoratto%2C+Zack%3BKim%2C+Taemin%3BBeyer%2C+Ross+A%3BFong%2C+Terry%3BGaddis%2C+Lisa+R%3BHare%2C+Trent+M&rft.aulast=Nefian&rft.aufirst=Ara&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=132&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/ L2 - https://pubs.er.usgs.gov/browse/usgs-publications/OFR LA - English DB - GeoRef N1 - Conference title - Planetary data workshop N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 3 N1 - PubXState - VA N1 - Document feature - illus. N1 - Last updated - 2016-10-27 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - albedo; Apollo 15; Apollo 16; Apollo 17; Apollo Metric Camera; Apollo Program; digital terrain models; imagery; mathematical methods; mathematical models; Moon; orbital observations; reconstruction; stereographic projection; USGS ER - TY - JOUR T1 - Combination of high-resolution images and multiple topographic datasets to investigate inverted fluvial features on Mars AN - 1832725427; 2016-088578 JF - Open-File Report - U. S. Geological Survey AU - Lefort, A AU - Burr, D M AU - Beyer, Ross A AU - Gaddis, Lisa R AU - Hare, Trent M Y1 - 2014 PY - 2014 DA - 2014 SP - 110 EP - 112 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - high-resolution methods KW - imagery KW - THEMIS KW - paleochannels KW - data processing KW - Mars KW - digital terrain models KW - two-dimensional models KW - terrestrial planets KW - planets KW - topography KW - surface features KW - fluvial features KW - USGS KW - image analysis KW - remote sensing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832725427?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Combination+of+high-resolution+images+and+multiple+topographic+datasets+to+investigate+inverted+fluvial+features+on+Mars&rft.au=Lefort%2C+A%3BBurr%2C+D+M%3BBeyer%2C+Ross+A%3BGaddis%2C+Lisa+R%3BHare%2C+Trent+M&rft.aulast=Lefort&rft.aufirst=A&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=110&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/ L2 - http://pubs.usgs.gov/of/2014/1056/ https://pubs.er.usgs.gov/browse/usgs-publications/OFR LA - English DB - GeoRef N1 - Conference title - Planetary data workshop N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 18 N1 - PubXState - VA N1 - SuppNotes - Accessed on April 29, 2014 N1 - Last updated - 2016-10-27 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - data processing; digital terrain models; fluvial features; high-resolution methods; image analysis; imagery; Mars; paleochannels; planets; remote sensing; surface features; terrestrial planets; THEMIS; topography; two-dimensional models; USGS ER - TY - JOUR T1 - LOLA primary topographic datasets, special products, and LRO combined data products AN - 1832725404; 2016-088540 JF - Open-File Report - U. S. Geological Survey AU - Barker, Michael K AU - Neumann, Gregory A AU - Gaddis, Lisa R AU - Hare, Trent M AU - Beyer, Ross A Y1 - 2014 PY - 2014 DA - 2014 SP - 27 EP - 28 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - high-resolution methods KW - Moon KW - Lunar Reconnaissance Orbiter KW - elevation KW - mapping KW - geodesy KW - information management KW - measurement KW - data management KW - models KW - topography KW - surface features KW - LOLA KW - USGS KW - accuracy KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832725404?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=LOLA+primary+topographic+datasets%2C+special+products%2C+and+LRO+combined+data+products&rft.au=Barker%2C+Michael+K%3BNeumann%2C+Gregory+A%3BGaddis%2C+Lisa+R%3BHare%2C+Trent+M%3BBeyer%2C+Ross+A&rft.aulast=Barker&rft.aufirst=Michael&rft.date=2014-01-01&rft.volume=&rft.issue=&rft.spage=27&rft.isbn=&rft.btitle=&rft.title=Open-File+Report+-+U.+S.+Geological+Survey&rft.issn=01961497&rft_id=info:doi/ L2 - http://pubs.usgs.gov/of/2014/1056/ https://pubs.er.usgs.gov/browse/usgs-publications/OFR LA - English DB - GeoRef N1 - Conference title - Planetary data workshop N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 2 N1 - PubXState - VA N1 - Document feature - illus. incl. sketch map N1 - SuppNotes - Accessed on April 23, 2014 N1 - Last updated - 2016-10-27 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - accuracy; data management; elevation; geodesy; high-resolution methods; information management; LOLA; Lunar Reconnaissance Orbiter; mapping; measurement; models; Moon; surface features; topography; USGS ER - TY - JOUR T1 - Planetary data workshop AN - 1832725387; 2016-088533 JF - Open-File Report - U. S. Geological Survey AU - Gaddis, Lisa R AU - Hare, Trent M AU - Beyer, Ross A Y1 - 2014 PY - 2014 DA - 2014 SP - 199 PB - U. S. Geological Survey, Reston, VA SN - 0196-1497, 0196-1497 KW - models KW - symposia KW - NASA KW - government agencies KW - data processing KW - data bases KW - planetology KW - USGS KW - research KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832725387?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Planetary+data+workshop&rft.au=Gaddis%2C+Lisa+R%3BHare%2C+Trent+M%3BBeyer%2C+Ross+A&rft.aulast=Gaddis&rft.aufirst=Lisa&rft.date=2014-01-01&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/ L2 - http://pubs.usgs.gov/of/2014/1056/ https://pubs.er.usgs.gov/browse/usgs-publications/OFR LA - English DB - GeoRef N1 - Conference title - Planetary data workshop N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - VA N1 - SuppNotes - Individual abstracts are cited separately N1 - Last updated - 2016-10-27 N1 - CODEN - XGROAG N1 - SubjectsTermNotLitGenreText - data bases; data processing; government agencies; models; NASA; planetology; research; symposia; USGS ER - TY - JOUR T1 - Alteration of sedimentary clasts in Martian meteorite Northwest Africa 7034 AN - 1832687156; 768619-65 JF - Annual Meeting of the Meteoritical Society AU - Mccubbin, F M AU - Tartese, R AU - Santos, A R AU - Domokos, G AU - Muttik, N AU - Szabo, T AU - Vazquez, J AU - Boyce, J W AU - Keller, L P AU - Jerolmack, D J AU - Anand, M AU - Moser, D E AU - Delhaye, T AU - Shearer, C K AU - Agee, C B AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5099 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - zircon group KW - silicates KW - Northwest Africa Meteorites KW - alteration KW - breccia KW - U/Pb KW - stony meteorites KW - textures KW - Martian meteorites KW - matrix KW - zircon KW - fluid phase KW - clasts KW - achondrites KW - nesosilicates KW - meteorites KW - sedimentary rocks KW - NWA 7034 KW - grain boundaries KW - dates KW - orthosilicates KW - absolute age KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832687156?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Alteration+of+sedimentary+clasts+in+Martian+meteorite+Northwest+Africa+7034&rft.au=Mccubbin%2C+F+M%3BTartese%2C+R%3BSantos%2C+A+R%3BDomokos%2C+G%3BMuttik%2C+N%3BSzabo%2C+T%3BVazquez%2C+J%3BBoyce%2C+J+W%3BKeller%2C+L+P%3BJerolmack%2C+D+J%3BAnand%2C+M%3BMoser%2C+D+E%3BDelhaye%2C+T%3BShearer%2C+C+K%3BAgee%2C+C+B%3BAnonymous&rft.aulast=Mccubbin&rft.aufirst=F&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/5099.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 5 N1 - SuppNotes - Accessed on July 1, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; alteration; breccia; clasts; dates; fluid phase; grain boundaries; Martian meteorites; matrix; meteorites; nesosilicates; Northwest Africa Meteorites; NWA 7034; orthosilicates; sedimentary rocks; silicates; stony meteorites; textures; U/Pb; zircon; zircon group ER - TY - JOUR T1 - Water content of lunar alkali feldspar AN - 1832687004; 768619-80 JF - Annual Meeting of the Meteoritical Society AU - Mills, R D AU - Simon, J I AU - Wang, J AU - Hauri, E H AU - Alexander, C M O'D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5373 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - ion probe data KW - Moon KW - igneous rocks KW - granites KW - alkali metals KW - mass spectra KW - Sample 15405 KW - lunar samples KW - KREEP KW - plutonic rocks KW - alkali feldspar KW - metals KW - potassium KW - water content KW - NanoSIMS KW - framework silicates KW - spectra KW - heterogeneity KW - feldspar group KW - degassing KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832687004?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Water+content+of+lunar+alkali+feldspar&rft.au=Mills%2C+R+D%3BSimon%2C+J+I%3BWang%2C+J%3BHauri%2C+E+H%3BAlexander%2C+C+M+O%27D%3BAnonymous&rft.aulast=Mills&rft.aufirst=R&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/5373.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 10 N1 - SuppNotes - Accessed on July 6, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - alkali feldspar; alkali metals; degassing; feldspar group; framework silicates; granites; heterogeneity; igneous rocks; ion probe data; KREEP; lunar samples; mass spectra; metals; Moon; NanoSIMS; plutonic rocks; potassium; Sample 15405; silicates; spectra; water content ER - TY - JOUR T1 - Coordinated mineralogical and isotopic analysis of a cosmic symplectite identified in a stardust terminal particle AN - 1832686807; 768619-94 JF - Annual Meeting of the Meteoritical Society AU - Nguyen, A N AU - Berger, E L AU - Nakamura-Messenger, K AU - Messenger, S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5388 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - stony meteorites KW - oxygen KW - ion probe data KW - isotopes KW - pentlandite KW - mass spectra KW - Acfer 094 KW - meteorites KW - pyroxene group KW - mineral composition KW - Wild 2 Comet KW - oxides KW - spectra KW - chondrites KW - chain silicates KW - sulfidation KW - Stardust Mission KW - parent bodies KW - oxidation KW - Acfer Meteorites KW - carbonaceous chondrites KW - hydration KW - comets KW - NanoSIMS KW - symplectite KW - sulfides KW - maghemite KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832686807?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Coordinated+mineralogical+and+isotopic+analysis+of+a+cosmic+symplectite+identified+in+a+stardust+terminal+particle&rft.au=Nguyen%2C+A+N%3BBerger%2C+E+L%3BNakamura-Messenger%2C+K%3BMessenger%2C+S%3BAnonymous&rft.aulast=Nguyen&rft.aufirst=A&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/5388.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 8 N1 - SuppNotes - Accessed on July 8, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - Acfer 094; Acfer Meteorites; carbonaceous chondrites; chain silicates; chondrites; comets; hydration; ion probe data; isotopes; maghemite; mass spectra; meteorites; mineral composition; NanoSIMS; oxidation; oxides; oxygen; parent bodies; pentlandite; pyroxene group; silicates; spectra; Stardust Mission; stony meteorites; sulfidation; sulfides; symplectite; Wild 2 Comet ER - TY - JOUR T1 - Formation of heterocycles from the UV irradiation of polycyclic aromatic hydrocarbons in ices AN - 1832686561; 768620-49 JF - Annual Meeting of the Meteoritical Society AU - Sandford, S A AU - Materese, C K AU - Nuevo, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5070 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - experimental studies KW - irradiation KW - naphthalene KW - photochemistry KW - cosmochemistry KW - benzene KW - ultraviolet radiation KW - organic compounds KW - electromagnetic radiation KW - ice KW - heterocycles KW - hydrocarbons KW - polycyclic aromatic hydrocarbons KW - quinoline KW - cosmic rays KW - aromatic hydrocarbons KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832686561?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Formation+of+heterocycles+from+the+UV+irradiation+of+polycyclic+aromatic+hydrocarbons+in+ices&rft.au=Sandford%2C+S+A%3BMaterese%2C+C+K%3BNuevo%2C+M%3BAnonymous&rft.aulast=Sandford&rft.aufirst=S&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/5070.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 7 N1 - SuppNotes - Accessed on Aug. 4, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aromatic hydrocarbons; benzene; cosmic rays; cosmochemistry; electromagnetic radiation; experimental studies; heterocycles; hydrocarbons; ice; irradiation; naphthalene; organic compounds; photochemistry; polycyclic aromatic hydrocarbons; quinoline; ultraviolet radiation ER - TY - JOUR T1 - Experimental crystallization of iron martensite in the Almahata Sitta ureilite AN - 1832686482; 768619-78 JF - Annual Meeting of the Meteoritical Society AU - Mikouchi, T AU - Aoyagi, Y AU - Sugiyama, K AU - Yokoyama, Y AU - Goodrich, C A AU - Zolensky, M E AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5069 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - alpha iron KW - experimental studies KW - stony meteorites KW - martensite KW - olivine group KW - ureilite KW - thermal history KW - achondrites KW - iron KW - temperature KW - nesosilicates KW - meteorites KW - pyroxene group KW - metals KW - olivine KW - orthosilicates KW - low temperature KW - crystallization KW - Almahata Sitta Meteorite KW - alloys KW - chemical composition KW - chain silicates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832686482?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Experimental+crystallization+of+iron+martensite+in+the+Almahata+Sitta+ureilite&rft.au=Mikouchi%2C+T%3BAoyagi%2C+Y%3BSugiyama%2C+K%3BYokoyama%2C+Y%3BGoodrich%2C+C+A%3BZolensky%2C+M+E%3BAnonymous&rft.aulast=Mikouchi&rft.aufirst=T&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/5069.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 4 N1 - SuppNotes - Accessed on July 6, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - achondrites; alloys; Almahata Sitta Meteorite; alpha iron; chain silicates; chemical composition; crystallization; experimental studies; iron; low temperature; martensite; metals; meteorites; nesosilicates; olivine; olivine group; orthosilicates; pyroxene group; silicates; stony meteorites; temperature; thermal history; ureilite ER - TY - JOUR T1 - Contemporary cosmic dust arriving at the Earth's surface; initial results from the Kwajalein micrometeorite collection AN - 1832686317; 768621-34 JF - Annual Meeting of the Meteoritical Society AU - Wozniakiewicz, P J AU - Bradley, J P AU - Price, M C AU - Zolensky, M E AU - Ishii, H A AU - Brownlee, D E AU - Russell, S S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5274 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - impact features KW - reefs KW - size KW - micrometeorites KW - meteorites KW - sampling KW - atolls KW - Pacific Ocean KW - Oceania KW - Micronesia KW - Marshall Islands KW - impact craters KW - Kwajalein Atoll KW - particles KW - filters KW - collections KW - spherules KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832686317?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Contemporary+cosmic+dust+arriving+at+the+Earth%27s+surface%3B+initial+results+from+the+Kwajalein+micrometeorite+collection&rft.au=Wozniakiewicz%2C+P+J%3BBradley%2C+J+P%3BPrice%2C+M+C%3BZolensky%2C+M+E%3BIshii%2C+H+A%3BBrownlee%2C+D+E%3BRussell%2C+S+S%3BAnonymous&rft.aulast=Wozniakiewicz&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/5274.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 6 N1 - SuppNotes - Accessed on Aug. 1, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - atolls; collections; filters; impact craters; impact features; Kwajalein Atoll; Marshall Islands; meteorites; micrometeorites; Micronesia; Oceania; Pacific Ocean; particles; reefs; sampling; silicates; size; spherules ER - TY - JOUR T1 - The highly primitive ALH 81189 EH3 chondrite AN - 1832685460; 768621-25 JF - Annual Meeting of the Meteoritical Society AU - Weisberg, M K AU - Zolensky, M E AU - Kimura, M AU - Ebel, D S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5357 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - stony meteorites KW - thermal alteration KW - amorphous materials KW - matrix KW - olivine group KW - ALH 81189 KW - nesosilicates KW - meteorites KW - EH chondrites KW - Allan Hills Meteorites KW - pyroxene group KW - mineral composition KW - presolar grains KW - silica KW - fine-grained materials KW - olivine KW - orthosilicates KW - petrography KW - enstatite chondrites KW - chondrites KW - chain silicates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832685460?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=The+highly+primitive+ALH+81189+EH3+chondrite&rft.au=Weisberg%2C+M+K%3BZolensky%2C+M+E%3BKimura%2C+M%3BEbel%2C+D+S%3BAnonymous&rft.aulast=Weisberg&rft.aufirst=M&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5357.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 14 N1 - SuppNotes - Accessed on July 29, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - ALH 81189; Allan Hills Meteorites; amorphous materials; chain silicates; chondrites; EH chondrites; enstatite chondrites; fine-grained materials; matrix; meteorites; mineral composition; nesosilicates; olivine; olivine group; orthosilicates; petrography; presolar grains; pyroxene group; silica; silicates; stony meteorites; thermal alteration ER - TY - JOUR T1 - Measuring volatile/solid carbon branching ratios for Fischer-Tropsch-type reactions AN - 1832685375; 768619-97 JF - Annual Meeting of the Meteoritical Society AU - Nuth, Joseph A AU - Johnson, Natasha M AU - Carayon, Alicia AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5019 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - experimental studies KW - methane KW - gaseous phase KW - aliphatic hydrocarbons KW - alkanes KW - geochemical cycle KW - solar nebula KW - carbon monoxide KW - volatiles KW - organic compounds KW - catalysis KW - hydrogen KW - carbon KW - hydrocarbons KW - carbon cycle KW - Fischer-Tropsch type reactions KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832685375?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Measuring+volatile%2Fsolid+carbon+branching+ratios+for+Fischer-Tropsch-type+reactions&rft.au=Nuth%2C+Joseph+A%3BJohnson%2C+Natasha+M%3BCarayon%2C+Alicia%3BAnonymous&rft.aulast=Nuth&rft.aufirst=Joseph&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/5019.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 7 N1 - SuppNotes - Accessed on July 8, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; carbon; carbon cycle; carbon monoxide; catalysis; experimental studies; Fischer-Tropsch type reactions; gaseous phase; geochemical cycle; hydrocarbons; hydrogen; methane; organic compounds; solar nebula; volatiles ER - TY - JOUR T1 - (super 40) Ar/ (super 39) Ar ages of anorthositic lunar rock 64435 AN - 1832682850; 768620-12 JF - Annual Meeting of the Meteoritical Society AU - Park, J AU - Nyquist, L E AU - Herzog, G F AU - Turrin, B D AU - Lindsay, F N AU - Delaney, J S AU - Swisher, C C, III AU - Shih, C Y AU - Shirai, N AU - Yamaguchi, A AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5197 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - plutons KW - Ar/Ar KW - magma oceans KW - Moon KW - igneous rocks KW - magmatism KW - clasts KW - melts KW - anorthosite KW - Sample 64435 KW - Late Heavy Bombardment KW - impact melts KW - lunar samples KW - intrusions KW - plutonic rocks KW - dates KW - lunar crust KW - absolute age KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832682850?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=%28super+40%29+Ar%2F+%28super+39%29+Ar+ages+of+anorthositic+lunar+rock+64435&rft.au=Park%2C+J%3BNyquist%2C+L+E%3BHerzog%2C+G+F%3BTurrin%2C+B+D%3BLindsay%2C+F+N%3BDelaney%2C+J+S%3BSwisher%2C+C+C%2C+III%3BShih%2C+C+Y%3BShirai%2C+N%3BYamaguchi%2C+A%3BAnonymous&rft.aulast=Park&rft.aufirst=J&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5197.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Number of references - 9 N1 - SuppNotes - Accessed on June 30, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - absolute age; anorthosite; Ar/Ar; clasts; dates; igneous rocks; impact melts; intrusions; Late Heavy Bombardment; lunar crust; lunar samples; magma oceans; magmatism; melts; Moon; plutonic rocks; plutons; Sample 64435 ER - TY - JOUR T1 - Nano-scale 3D observation of GEMS grains AN - 1832682807; 768619-63 JF - Annual Meeting of the Meteoritical Society AU - Matsuno, J AU - Miyake, A AU - Tsuchiyama, A AU - Nakamura-Messenger, K AU - Messenger, S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 579 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - tomography KW - condensation KW - glass with embedded metal and sulfides KW - electron tomography KW - electron microscopy data KW - interplanetary dust KW - X-ray spectra KW - TEM data KW - iron KW - EDS spectra KW - cosmic dust KW - metals KW - spectra KW - sulfides KW - GEMS grains KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832682807?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Nano-scale+3D+observation+of+GEMS+grains&rft.au=Matsuno%2C+J%3BMiyake%2C+A%3BTsuchiyama%2C+A%3BNakamura-Messenger%2C+K%3BMessenger%2C+S%3BAnonymous&rft.aulast=Matsuno&rft.aufirst=J&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5079.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Number of references - 5 N1 - SuppNotes - Accessed on July 1, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - condensation; cosmic dust; EDS spectra; electron microscopy data; electron tomography; GEMS grains; glass with embedded metal and sulfides; interplanetary dust; iron; metals; spectra; sulfides; TEM data; tomography; X-ray spectra ER - TY - JOUR T1 - Noble gases in two fragments of different lithologies from the Almahata Sitta Meteorite AN - 1832682507; 768619-90 JF - Annual Meeting of the Meteoritical Society AU - Nagao, K AU - Haba, M K AU - Zolensky, M AU - Jenniskens, P AU - Shaddad, M H AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5204 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - Ne-21 KW - stony meteorites KW - isotopes KW - isotope ratios KW - mass spectra KW - Ne-22/Ne-21 KW - He-3 KW - ureilite KW - xenon KW - krypton KW - achondrites KW - stable isotopes KW - meteorite falls KW - argon KW - meteorites KW - noble gases KW - neon KW - fragments KW - helium KW - Almahata Sitta Meteorite KW - spectra KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832682507?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Noble+gases+in+two+fragments+of+different+lithologies+from+the+Almahata+Sitta+Meteorite&rft.au=Nagao%2C+K%3BHaba%2C+M+K%3BZolensky%2C+M%3BJenniskens%2C+P%3BShaddad%2C+M+H%3BAnonymous&rft.aulast=Nagao&rft.aufirst=K&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/5204.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Number of references - 12 N1 - SuppNotes - Accessed on July 8, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - achondrites; Almahata Sitta Meteorite; argon; fragments; He-3; helium; isotope ratios; isotopes; krypton; mass spectra; meteorite falls; meteorites; Ne-21; Ne-22/Ne-21; neon; noble gases; spectra; stable isotopes; stony meteorites; ureilite; xenon ER - TY - JOUR T1 - Current status of the consortium study of the largest Itokawa particle RA-QD02-0136-01 AN - 1832682423; 768621-5 JF - Annual Meeting of the Meteoritical Society AU - Uesugi, M AU - Tsuchiyama, A AU - Uesugi, K AU - Takeuchi, A AU - Suzuki, Y AU - Park, J AU - Nagao, K AU - Nishiizumi, K AU - Nakashima, D AU - Kita, N AU - Langenhorst, F AU - Keller, L AU - Karouji, Y AU - Nakato, A AU - Yada, T AU - Kumagai, K AU - Okada, T AU - Abe, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5226 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - plagioclase KW - Itokawa Asteroid KW - asteroids KW - olivine group KW - synchrotron radiation KW - nesosilicates KW - mass KW - pyroxene group KW - mineral composition KW - olivine plagioclase KW - Hayabusa Mission KW - olivine KW - consortium studies KW - orthosilicates KW - S-type asteroids KW - framework silicates KW - computed tomography data KW - feldspar group KW - particles KW - chain silicates KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832682423?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Current+status+of+the+consortium+study+of+the+largest+Itokawa+particle+RA-QD02-0136-01&rft.au=Uesugi%2C+M%3BTsuchiyama%2C+A%3BUesugi%2C+K%3BTakeuchi%2C+A%3BSuzuki%2C+Y%3BPark%2C+J%3BNagao%2C+K%3BNishiizumi%2C+K%3BNakashima%2C+D%3BKita%2C+N%3BLangenhorst%2C+F%3BKeller%2C+L%3BKarouji%2C+Y%3BNakato%2C+A%3BYada%2C+T%3BKumagai%2C+K%3BOkada%2C+T%3BAbe%2C+M%3BAnonymous&rft.aulast=Uesugi&rft.aufirst=M&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5226.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Number of references - 8 N1 - SuppNotes - Accessed on July 26, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - asteroids; chain silicates; computed tomography data; consortium studies; feldspar group; framework silicates; Hayabusa Mission; Itokawa Asteroid; mass; mineral composition; nesosilicates; olivine; olivine group; olivine plagioclase; orthosilicates; particles; plagioclase; pyroxene group; S-type asteroids; silicates; synchrotron radiation ER - TY - JOUR T1 - The dumbbell, layered internal schlieren tektite from China AN - 1832681742; 768620-23 JF - Annual Meeting of the Meteoritical Society AU - Povenmire, H AU - Lehrman, N AU - Zolensky, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5342 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - strewn fields KW - Far East KW - Australasia KW - atmospheric entry KW - layered materials KW - electron probe data KW - splash form tektites KW - schlieren KW - Guang Dong China KW - heterogeneity KW - Asia KW - China KW - tektites KW - muong nong-type tektites KW - dumbbell shape KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832681742?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=The+dumbbell%2C+layered+internal+schlieren+tektite+from+China&rft.au=Povenmire%2C+H%3BLehrman%2C+N%3BZolensky%2C+M%3BAnonymous&rft.aulast=Povenmire&rft.aufirst=H&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/5342.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Number of references - 1 N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on July 7, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - Asia; atmospheric entry; Australasia; China; dumbbell shape; electron probe data; Far East; Guang Dong China; heterogeneity; layered materials; muong nong-type tektites; schlieren; splash form tektites; strewn fields; tektites ER - TY - JOUR T1 - Investigating protostellar carbon reservoirs with high-resolution spectroscopy toward massive young stellar objects AN - 1832681733; 768620-66 JF - Annual Meeting of the Meteoritical Society AU - Smith, R L AU - Blake, G A AU - Boogert, A C A AU - Pontoppidan, K M AU - Lockwood, A C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5435 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - near-infrared spectra KW - high-resolution methods KW - isotopes KW - isotope ratios KW - C-13/C-12 KW - cosmochemistry KW - stable isotopes KW - gases KW - young stellar objects KW - carbon monoxide KW - ice KW - carbon KW - spectra KW - heterogeneity KW - spectroscopy KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832681733?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Investigating+protostellar+carbon+reservoirs+with+high-resolution+spectroscopy+toward+massive+young+stellar+objects&rft.au=Smith%2C+R+L%3BBlake%2C+G+A%3BBoogert%2C+A+C+A%3BPontoppidan%2C+K+M%3BLockwood%2C+A+C%3BAnonymous&rft.aulast=Smith&rft.aufirst=R&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/5435.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Number of references - 9 N1 - SuppNotes - Accessed on Aug. 24, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - C-13/C-12; carbon; carbon monoxide; cosmochemistry; gases; heterogeneity; high-resolution methods; ice; isotope ratios; isotopes; near-infrared spectra; spectra; spectroscopy; stable isotopes; young stellar objects ER - TY - JOUR T1 - Hydrothermal organic synthesis on Mars; evidence from the Tissint Meteorite AN - 1832681651; 768620-72 JF - Annual Meeting of the Meteoritical Society AU - Steele, A AU - Mccubbin, F M AU - Benning, L G AU - Siljestrom, S AU - Cody, G D AU - Goreva, Y AU - Hauri, E H AU - Wang, J AU - Kilcoyne, A L D AU - Grady, M AU - Verchovsky, A AU - Sabbah, H AU - Smith, C AU - Freissinet, C AU - Glavin, D P AU - Burton, A S AU - Fries, M D AU - Blanco, J D Rodriguez AU - Glamoclija, M AU - Rogers, K L AU - Mikhail, S AU - Zare, R N AU - Wu, Q AU - Ismail, A AU - Dworkin, J P AU - Bhartia, R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5331 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - anhydrite KW - stony meteorites KW - isotopes KW - Martian meteorites KW - aliphatic hydrocarbons KW - Mars KW - clay mienrals KW - stable isotopes KW - SNC Meteorites KW - meteorites KW - catalysis KW - carbon KW - oxides KW - synthesis KW - organic carbon KW - pyrrhotite KW - sulfates KW - achondrites KW - hydrothermal conditions KW - clay minerals KW - terrestrial planets KW - planets KW - Tissint Meteorite KW - organic compounds KW - shergottite KW - hydrocarbons KW - sheet silicates KW - sulfides KW - aromatic hydrocarbons KW - magnetite KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832681651?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Hydrothermal+organic+synthesis+on+Mars%3B+evidence+from+the+Tissint+Meteorite&rft.au=Steele%2C+A%3BMccubbin%2C+F+M%3BBenning%2C+L+G%3BSiljestrom%2C+S%3BCody%2C+G+D%3BGoreva%2C+Y%3BHauri%2C+E+H%3BWang%2C+J%3BKilcoyne%2C+A+L+D%3BGrady%2C+M%3BVerchovsky%2C+A%3BSabbah%2C+H%3BSmith%2C+C%3BFreissinet%2C+C%3BGlavin%2C+D+P%3BBurton%2C+A+S%3BFries%2C+M+D%3BBlanco%2C+J+D+Rodriguez%3BGlamoclija%2C+M%3BRogers%2C+K+L%3BMikhail%2C+S%3BZare%2C+R+N%3BWu%2C+Q%3BIsmail%2C+A%3BDworkin%2C+J+P%3BBhartia%2C+R%3BAnonymous&rft.aulast=Steele&rft.aufirst=A&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/5331.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - achondrites; aliphatic hydrocarbons; anhydrite; aromatic hydrocarbons; carbon; catalysis; clay mienrals; clay minerals; hydrocarbons; hydrothermal conditions; isotopes; magnetite; Mars; Martian meteorites; meteorites; organic carbon; organic compounds; oxides; planets; pyrrhotite; sheet silicates; shergottite; silicates; SNC Meteorites; stable isotopes; stony meteorites; sulfates; sulfides; synthesis; terrestrial planets; Tissint Meteorite ER - TY - JOUR T1 - Detecting and distinguishing metamorphic gradients of unequilibrated (type 3) ordinary chondrites using infrared reflectance spectra AN - 1832681585; 768620-99 JF - Annual Meeting of the Meteoritical Society AU - Trivedi, M AU - Smith, H D AU - Sears, D W G AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5451 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - methods KW - near-infrared spectra KW - ordinary chondrites KW - stony meteorites KW - unequilibrated ordinary chondrites KW - metamorphism KW - infrared spectra KW - meteorites KW - pyroxene group KW - detection KW - clinopyroxene KW - classification KW - petrography KW - spectra KW - orthopyroxene KW - chondrites KW - reflectance KW - chain silicates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832681585?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Detecting+and+distinguishing+metamorphic+gradients+of+unequilibrated+%28type+3%29+ordinary+chondrites+using+infrared+reflectance+spectra&rft.au=Trivedi%2C+M%3BSmith%2C+H+D%3BSears%2C+D+W+G%3BAnonymous&rft.aulast=Trivedi&rft.aufirst=M&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5451.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Number of references - 4 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - chain silicates; chondrites; classification; clinopyroxene; detection; infrared spectra; metamorphism; meteorites; methods; near-infrared spectra; ordinary chondrites; orthopyroxene; petrography; pyroxene group; reflectance; silicates; spectra; stony meteorites; unequilibrated ordinary chondrites ER - TY - JOUR T1 - Howardites and mesosiderites; contrasting polymict breccias from two similar differentiated asteroids AN - 1832680334; 768619-81 JF - Annual Meeting of the Meteoritical Society AU - Mittlefehldt, D W AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5313 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - stony irons KW - silicates KW - breccia KW - stony meteorites KW - asteroids KW - Vesta Asteroid KW - parent bodies KW - differentiation KW - anomalies KW - clasts KW - achondrites KW - meteorites KW - howardite KW - mixing KW - mesosiderite KW - polymict breccia KW - regolith KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832680334?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Howardites+and+mesosiderites%3B+contrasting+polymict+breccias+from+two+similar+differentiated+asteroids&rft.au=Mittlefehldt%2C+D+W%3BAnonymous&rft.aulast=Mittlefehldt&rft.aufirst=D&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/5313.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Number of references - 12 N1 - SuppNotes - Accessed on July 7, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - achondrites; anomalies; asteroids; breccia; clasts; differentiation; howardite; mesosiderite; meteorites; mixing; parent bodies; polymict breccia; regolith; silicates; stony irons; stony meteorites; Vesta Asteroid ER - TY - JOUR T1 - Surviving high-temperature components in CI chondrites AN - 1832679625; 768621-49 JF - Annual Meeting of the Meteoritical Society AU - Zolensky, M AU - Frank, D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5205 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - silicates KW - serpentine KW - stony meteorites KW - calcium-aluminum inclusions KW - olivine group KW - microchondrules KW - meteorites KW - pyroxene group KW - mineral composition KW - serpentine group KW - olivine KW - inclusions KW - orthosilicates KW - relict materials KW - chondrites KW - chain silicates KW - CI chondrites KW - saponite KW - electron microscopy data KW - carbonaceous chondrites KW - TEM data KW - early solar system KW - clay minerals KW - nesosilicates KW - aqueous alteration KW - chondrules KW - sheet silicates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832679625?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Surviving+high-temperature+components+in+CI+chondrites&rft.au=Zolensky%2C+M%3BFrank%2C+D%3BAnonymous&rft.aulast=Zolensky&rft.aufirst=M&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5202.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 3 N1 - Document feature - illus. N1 - SuppNotes - Accessed on Aug. 3, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aqueous alteration; calcium-aluminum inclusions; carbonaceous chondrites; chain silicates; chondrites; chondrules; CI chondrites; clay minerals; early solar system; electron microscopy data; inclusions; meteorites; microchondrules; mineral composition; nesosilicates; olivine; olivine group; orthosilicates; pyroxene group; relict materials; saponite; serpentine; serpentine group; sheet silicates; silicates; stony meteorites; TEM data ER - TY - JOUR T1 - Northwest Africa 8159; an approximately 2.3 billion year old Martian olivine-bearing augite basalt AN - 1832679548; 768620-59 JF - Annual Meeting of the Meteoritical Society AU - Simon, J I AU - Peters, T J AU - Tappa, M J AU - Agee, C B AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5363 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - Northwest Africa Meteorites KW - volcanic rocks KW - stony meteorites KW - Martian meteorites KW - igneous rocks KW - thermal ionization mass spectra KW - mass spectra KW - NWA 8159 KW - achondrites KW - meteorites KW - Sm/Nd KW - dates KW - mixing KW - basalts KW - absolute age KW - leachate KW - spectra KW - Sr/Rb KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832679548?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Northwest+Africa+8159%3B+an+approximately+2.3+billion+year+old+Martian+olivine-bearing+augite+basalt&rft.au=Simon%2C+J+I%3BPeters%2C+T+J%3BTappa%2C+M+J%3BAgee%2C+C+B%3BAnonymous&rft.aulast=Simon&rft.aufirst=J&rft.date=2014-01-01&rft.volume=77&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2014/pdf/5363.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 4 N1 - SuppNotes - Accessed on Aug. 24, 2016 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - absolute age; achondrites; basalts; dates; igneous rocks; leachate; Martian meteorites; mass spectra; meteorites; mixing; Northwest Africa Meteorites; NWA 8159; Sm/Nd; spectra; Sr/Rb; stony meteorites; thermal ionization mass spectra; volcanic rocks ER - TY - JOUR T1 - Search for fluid inclusions in a carbonaceous chondrite using a new X-ray micro-tomography technique combined with FIB sampling AN - 1832679494; 768620-100 JF - Annual Meeting of the Meteoritical Society AU - Tsuchiyama, A AU - Miyake, A AU - Zolensky, M E AU - Uesugi, K AU - Nakano, T AU - Takeuchi, A AU - Suzuki, Y AU - Yoshida, K AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 5152 PB - The Society, [United States] VL - 77 SN - 0735-049X, 0735-049X KW - stony meteorites KW - bubbles KW - Sutter's Mill Meteorite KW - carbonaceous chondrites KW - calcite KW - meteorites KW - focused ion beam KW - X-ray data KW - inclusions KW - fluid inclusions KW - CM chondrites KW - computed tomography data KW - chondrites KW - X-ray micro-tomography KW - sulfides KW - carbonates KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832679494?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Search+for+fluid+inclusions+in+a+carbonaceous+chondrite+using+a+new+X-ray+micro-tomography+technique+combined+with+FIB+sampling&rft.au=Tsuchiyama%2C+A%3BMiyake%2C+A%3BZolensky%2C+M+E%3BUesugi%2C+K%3BNakano%2C+T%3BTakeuchi%2C+A%3BSuzuki%2C+Y%3BYoshida%2C+K%3BAnonymous&rft.aulast=Tsuchiyama&rft.aufirst=A&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/5152.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 77th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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N1 - Number of references - 4 N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - bubbles; calcite; carbonaceous chondrites; carbonates; chondrites; CM chondrites; computed tomography data; fluid inclusions; focused ion beam; inclusions; meteorites; stony meteorites; sulfides; Sutter's Mill Meteorite; X-ray data; X-ray micro-tomography ER - TY - JOUR T1 - LASER micro Raman spectroscopy on returned particles from the asteroid Itokawa (JAXA Hayabusa mission) AN - 1832677497; 778255-52 JF - NIPR Symposium on Polar Science AU - Hoffmann, V H AU - Kaliwoda, M AU - Hochleitner, R AU - Mikouchi, T AU - Komatsu, M AU - Hagiya, K AU - Ohsumi, K AU - Zolensky, M AU - Martinez, J AU - Terada, Y AU - Yagi, N AU - Takata, M AU - Satake, W AU - Aoyagi, Y AU - Takenouchi, A AU - Karouji, Y AU - Uesugi, M AU - Yada, T AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - unpaginated PB - National Institute of Polar Research, Tokyo VL - 5 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832677497?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=NIPR+Symposium+on+Polar+Science&rft.atitle=LASER+micro+Raman+spectroscopy+on+returned+particles+from+the+asteroid+Itokawa+%28JAXA+Hayabusa+mission%29&rft.au=Hoffmann%2C+V+H%3BKaliwoda%2C+M%3BHochleitner%2C+R%3BMikouchi%2C+T%3BKomatsu%2C+M%3BHagiya%2C+K%3BOhsumi%2C+K%3BZolensky%2C+M%3BMartinez%2C+J%3BTerada%2C+Y%3BYagi%2C+N%3BTakata%2C+M%3BSatake%2C+W%3BAoyagi%2C+Y%3BTakenouchi%2C+A%3BKarouji%2C+Y%3BUesugi%2C+M%3BYada%2C+T%3BAnonymous&rft.aulast=Hoffmann&rft.aufirst=V&rft.date=2014-01-01&rft.volume=5&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=NIPR+Symposium+on+Polar+Science&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - The 5th symposium on polar science N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 2 N1 - Last updated - 2017-01-24 N1 - CODEN - #07980 ER - TY - JOUR T1 - Aerosol microphysics simulations of the Mt. Pinatubo eruption with the UM-UKCA composition-climate model AN - 1832653762; 715935-17 AB - We use a stratosphere-troposphere composition-climate model with interactive sulfur chemistry and aerosol microphysics, to investigate the effect of the 1991 Mount Pinatubo eruption on stratospheric aerosol properties. Satellite measurements indicate that shortly after the eruption, between 14 and 23 Tg of SO (sub 2) (7 to 11.5 Tg of sulfur) was present in the tropical stratosphere. Best estimates of the peak global stratospheric aerosol burden are in the range 19 to 26 Tg, or 3.7 to 6.7 Tg of sulfur assuming a composition of between 59 and 77 % H (sub 2) SO (sub 4) . In light of this large uncertainty range, we performed two main simulations with 10 and 20 Tg of SO (sub 2) injected into the tropical lower stratosphere. Simulated stratospheric aerosol properties through the 1991 to 1995 period are compared against a range of available satellite and in situ measurements. Stratospheric aerosol optical depth (sAOD) and effective radius from both simulations show good qualitative agreement with the observations, with the timing of peak sAOD and decay timescale matching well with the observations in the tropics and mid-latitudes. However, injecting 20 Tg gives a factor of 2 too high stratospheric aerosol mass burden compared to the satellite data, with consequent strong high biases in simulated sAOD and surface area density, with the 10 Tg injection in much better agreement. Our model cannot explain the large fraction of the injected sulfur that the satellite-derived SO (sub 2) and aerosol burdens indicate was removed within the first few months after the eruption. We suggest that either there is an additional alternative loss pathway for the SO (sub 2) not included in our model (e.g. via accommodation into ash or ice in the volcanic cloud) or that a larger proportion of the injected sulfur was removed via cross-tropopause transport than in our simulations. We also critically evaluate the simulated evolution of the particle size distribution, comparing in detail to balloon-borne optical particle counter (OPC) measurements from Laramie, Wyoming, USA (41 degrees N). Overall, the model captures remarkably well the complex variations in particle concentration profiles across the different OPC size channels. However, for the 19 to 27 km injection height-range used here, both runs have a modest high bias in the lowermost stratosphere for the finest particles (radii less than 250 nm), and the decay timescale is longer in the model for these particles, with a much later return to background conditions. Also, whereas the 10 Tg run compared best to the satellite measurements, a significant low bias is apparent in the coarser size channels in the volcanically perturbed lower stratosphere. Overall, our results suggest that, with appropriate calibration, aerosol microphysics models are capable of capturing the observed variation in particle size distribution in the stratosphere across both volcanically perturbed and quiescent conditions. Furthermore, additional sensitivity simulations suggest that predictions with the models are robust to uncertainties in sub-grid particle formation and nucleation rates in the stratosphere. JF - Atmospheric Chemistry and Physics AU - Dhomse, S S AU - Emmerson, K M AU - Mann, G W AU - Bellouin, N AU - Carslaw, K S AU - Chipperfield, M P AU - Hommel, R AU - Abraham, N L AU - Telford, P AU - Braesicke, P AU - Dalvi, M AU - Johnson, C E AU - O'Connor, F AU - Morgenstern, O AU - Pyle, J A AU - Deshler, T AU - Zawodny, J M AU - Thomason, L W Y1 - 2014 PY - 2014 DA - 2014 SP - 11221 EP - 11246 PB - Copernicus, Katlenburg-Lindau VL - 14 IS - 20 SN - 1680-7316, 1680-7316 KW - Far East KW - GLOMAP KW - troposphere KW - variations KW - size distribution KW - stratosphere KW - sensitivity analysis KW - mixing KW - specific surface KW - water content KW - Asia KW - climate KW - experimental studies KW - gaseous phase KW - time series analysis KW - global KW - atmosphere KW - satellite methods KW - distribution KW - measurement KW - models KW - physical properties KW - UM-UKCA model KW - Philippine Islands KW - atmospheric transport KW - optical extinction KW - aerosols KW - optical depth KW - particles KW - Luzon KW - density KW - water vapor KW - simulation KW - Mount Pinatubo KW - transport KW - volcanism KW - sulfur cycle KW - dimensions KW - chemical composition KW - chemical ratios KW - concentration KW - pressure KW - condensation KW - grain size KW - statistical analysis KW - geochemical cycle KW - optical properties KW - eruptions KW - volcanoes KW - sulfur KW - 05A:Igneous and metamorphic petrology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832653762?accountid=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=Atmospheric+Chemistry+and+Physics&rft.atitle=Aerosol+microphysics+simulations+of+the+Mt.+Pinatubo+eruption+with+the+UM-UKCA+composition-climate+model&rft.au=Dhomse%2C+S+S%3BEmmerson%2C+K+M%3BMann%2C+G+W%3BBellouin%2C+N%3BCarslaw%2C+K+S%3BChipperfield%2C+M+P%3BHommel%2C+R%3BAbraham%2C+N+L%3BTelford%2C+P%3BBraesicke%2C+P%3BDalvi%2C+M%3BJohnson%2C+C+E%3BO%27Connor%2C+F%3BMorgenstern%2C+O%3BPyle%2C+J+A%3BDeshler%2C+T%3BZawodny%2C+J+M%3BThomason%2C+L+W&rft.aulast=Dhomse&rft.aufirst=S&rft.date=2014-01-01&rft.volume=14&rft.issue=20&rft.spage=11221&rft.isbn=&rft.btitle=&rft.title=Atmospheric+Chemistry+and+Physics&rft.issn=16807316&rft_id=info:doi/ L2 - http://www.atmos-chem-phys.net/14/11221/2014/acp-14-11221-2014.pdf http://www.atmospheric-chemistry-and-physics.net/home.html LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. 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Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Number of references - 111 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aerosols; Asia; atmosphere; atmospheric transport; chemical composition; chemical ratios; climate; concentration; condensation; density; dimensions; distribution; eruptions; experimental studies; Far East; gaseous phase; geochemical cycle; global; GLOMAP; grain size; Luzon; measurement; mixing; models; Mount Pinatubo; optical depth; optical extinction; optical properties; particles; Philippine Islands; physical properties; pressure; satellite methods; sensitivity analysis; simulation; size distribution; specific surface; statistical analysis; stratosphere; sulfur; sulfur cycle; time series analysis; transport; troposphere; UM-UKCA model; variations; volcanism; volcanoes; water content; water vapor ER - TY - JOUR T1 - Dispersion of the Nabro volcanic plume and its relation to the Asian summer monsoon AN - 1832633389; 704402-35 AB - We use nighttime measurements from the Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite, together with a Lagrangian trajectory model, to study the initial dispersion of volcanic aerosol from the eruption of Mt. Nabro (Ethiopia/Eritrea) in June 2011. The Nabro eruption reached the upper troposphere and lower stratosphere (UTLS) directly, and the plume was initially entrained by the flow surrounding the Asian anticyclone, which prevails in the UTLS from the Mediterranean Sea to East Asia during boreal summer. CALIPSO detected aerosol layers, with optical properties consistent with sulfate, in the lower stratosphere above the monsoon convective region in South and Southeast Asia within 10 days of the eruption. We show that quasi-isentropic differential advection in the vertically sheared flow surrounding the Asian anticyclone explains many of these stratospheric aerosol layers. We use Meteosat-7 data to examine the possible role of deep convection in the Asian monsoon in transporting volcanic material to the lower stratosphere during this time, but find no evidence that convection played a direct role, in contrast with claims made in earlier studies. On longer timescales, we use CALIPSO data to illustrate diabatic ascent of the Nabro aerosol in the lower stratosphere at rates of approximately 10 K per month for the first two months after the eruption, falling to approximately 3 K per month after the Asian anticyclone dissipates. Maps of stratospheric aerosol optical depth (AOD) show local peaks of approximately 0.04-0.06 in July in the region of the Asian anticyclone; we find associated estimates of radiative forcing small, approximately 5-10% of those reported for the eruption of Mt. Pinatubo in 1991. Additionally, we find no clear response in outgoing shortwave (SW) flux due to the presence of Nabro aerosol viewed in the context of SW flux variability as measured by CERES (Clouds and Earth Radiant Energy System). JF - Atmospheric Chemistry and Physics AU - Fairlie, T D AU - Vernier, J -P AU - Natarajan, M AU - Bedka, K M Y1 - 2014 PY - 2014 DA - 2014 SP - 7045 EP - 7057 PB - Copernicus, Katlenburg-Lindau VL - 14 IS - 13 SN - 1680-7316, 1680-7316 KW - laser methods KW - East Africa KW - Asian Anticyclone KW - data processing KW - solar forcing KW - troposphere KW - simulation KW - atmospheric circulation KW - monsoons KW - Ethiopia KW - stratosphere KW - transport KW - volcanism KW - CALIOP KW - Southeast Asia KW - climate forcing KW - Asia KW - meteorology KW - sulfur dioxide KW - Lagrangian Trajectory model KW - ground methods KW - correlation KW - CALIPSO KW - convection KW - advection KW - Mount Nabro KW - provenance KW - lidar methods KW - atmospheric transport KW - eruptions KW - Africa KW - aerosols KW - ash clouds KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832633389?accountid=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=Atmospheric+Chemistry+and+Physics&rft.atitle=Dispersion+of+the+Nabro+volcanic+plume+and+its+relation+to+the+Asian+summer+monsoon&rft.au=Fairlie%2C+T+D%3BVernier%2C+J+-P%3BNatarajan%2C+M%3BBedka%2C+K+M&rft.aulast=Fairlie&rft.aufirst=T&rft.date=2014-01-01&rft.volume=14&rft.issue=13&rft.spage=7045&rft.isbn=&rft.btitle=&rft.title=Atmospheric+Chemistry+and+Physics&rft.issn=16807316&rft_id=info:doi/ L2 - http://www.atmos-chem-phys.net/14/7045/2014/acp-14-7045-2014.pdf http://www.atmospheric-chemistry-and-physics.net/home.html LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Number of references - 38 N1 - Document feature - illus. incl. sects. N1 - SuppNotes - The Supplement related to this article is available online at DOI: 10.5194/acp-14-7045-2014-supplement N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - advection; aerosols; Africa; ash clouds; Asia; Asian Anticyclone; atmospheric circulation; atmospheric transport; CALIOP; CALIPSO; climate forcing; convection; correlation; data processing; East Africa; eruptions; Ethiopia; ground methods; Lagrangian Trajectory model; laser methods; lidar methods; meteorology; monsoons; Mount Nabro; provenance; simulation; solar forcing; Southeast Asia; stratosphere; sulfur dioxide; transport; troposphere; volcanism ER - TY - JOUR T1 - Source of carbonaceous materials from hayabusa-returned samples; evaluation from XANES study AN - 1832626592; 778255-75 JF - NIPR Symposium on Polar Science AU - Yabuta, H AU - Uesugi, M AU - Naraoka, H AU - Kilcoyne, D AU - Sandford, S A AU - Kitajima, F AU - Mita, H AU - Takano, Y AU - Yada, T AU - Karouji, Y AU - ishibashi, Y AU - Okada, T AU - Abe, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - unpaginated PB - National Institute of Polar Research, Tokyo VL - 5 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832626592?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=NIPR+Symposium+on+Polar+Science&rft.atitle=Source+of+carbonaceous+materials+from+hayabusa-returned+samples%3B+evaluation+from+XANES+study&rft.au=Yabuta%2C+H%3BUesugi%2C+M%3BNaraoka%2C+H%3BKilcoyne%2C+D%3BSandford%2C+S+A%3BKitajima%2C+F%3BMita%2C+H%3BTakano%2C+Y%3BYada%2C+T%3BKarouji%2C+Y%3Bishibashi%2C+Y%3BOkada%2C+T%3BAbe%2C+M%3BAnonymous&rft.aulast=Yabuta&rft.aufirst=H&rft.date=2014-01-01&rft.volume=5&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=NIPR+Symposium+on+Polar+Science&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - The 5th symposium on polar science N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 4 N1 - Last updated - 2017-01-24 N1 - CODEN - #07980 ER - TY - JOUR T1 - Aqueous fluid inclusion candidates in Sutter's Mill meteorite (CM) and their 3D micro-textures using x-ray micro-tomography combined with FIB sampling AN - 1832625866; 778255-74 JF - NIPR Symposium on Polar Science AU - Tsuchiyama, A AU - Miyake, A AU - Zolensky, M E AU - Uesugi, K AU - Nakano, T AU - Takeuchi, A AU - Suzuki, Y AU - Yoshida, K AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - unpaginated PB - National Institute of Polar Research, Tokyo VL - 5 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832625866?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=NIPR+Symposium+on+Polar+Science&rft.atitle=Aqueous+fluid+inclusion+candidates+in+Sutter%27s+Mill+meteorite+%28CM%29+and+their+3D+micro-textures+using+x-ray+micro-tomography+combined+with+FIB+sampling&rft.au=Tsuchiyama%2C+A%3BMiyake%2C+A%3BZolensky%2C+M+E%3BUesugi%2C+K%3BNakano%2C+T%3BTakeuchi%2C+A%3BSuzuki%2C+Y%3BYoshida%2C+K%3BAnonymous&rft.aulast=Tsuchiyama&rft.aufirst=A&rft.date=2014-01-01&rft.volume=5&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=NIPR+Symposium+on+Polar+Science&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - The 5th symposium on polar science N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 6 N1 - Last updated - 2017-01-24 N1 - CODEN - #07980 ER - TY - JOUR T1 - Microbial Fe(III) oxide reduction potential in Chocolate Pots hot springs, Yellowstone National Park AN - 1832584361; 697186-25 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Fortney, Nathaniel W AU - Roden, Eric E AU - Boyd, Eric S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 725 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - iron oxides KW - isotopes KW - Geobacter metallireducens KW - Thermodesulfovibrio KW - stable isotopes KW - iron KW - temperature KW - ferric iron KW - controls KW - Yellowstone National Park KW - oxides KW - reduction KW - pH KW - Eh KW - Desulfohalobium KW - isotope ratios KW - oxidation KW - nucleic acids KW - RNA KW - metals KW - Chocolate Pots hot springs KW - bacteria KW - Fe-57/Fe-54 KW - DNA KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832584361?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Microbial+Fe%28III%29+oxide+reduction+potential+in+Chocolate+Pots+hot+springs%2C+Yellowstone+National+Park&rft.au=Fortney%2C+Nathaniel+W%3BRoden%2C+Eric+E%3BBoyd%2C+Eric+S%3BAnonymous&rft.aulast=Fortney&rft.aufirst=Nathaniel&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=725&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 in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - bacteria; Chocolate Pots hot springs; controls; Desulfohalobium; DNA; Eh; Fe-57/Fe-54; ferric iron; Geobacter metallireducens; iron; iron oxides; isotope ratios; isotopes; metals; nucleic acids; oxidation; oxides; pH; reduction; RNA; stable isotopes; temperature; Thermodesulfovibrio; United States; Yellowstone National Park ER - TY - JOUR T1 - Characterizing the purple Earth; modeling the globally integrated spectral variability of the Archean Earth AN - 1832583956; 689285-52 AB - Ongoing searches for exoplanetary systems have revealed a wealth of planets with diverse physical properties. Planets even smaller than the Earth have already been detected and the efforts of future missions are aimed at the discovery, and perhaps characterization, of small rocky exoplanets within the habitable zone of their stars. Clearly, what we know about our planet will be our guideline for the characterization of such planets. However, the Earth has been inhabited for at least 3.8 Gyr and its appearance has changed with time. Here, we have studied the Earth during the Archean eon, 3.0 Gyr ago. At that time, one of the more widespread life forms on the planet was purple bacteria. These bacteria are photosynthetic microorganisms and can inhabit both aquatic and terrestrial environments. Here, we use a radiative transfer model to simulate the visible and near-infrared radiation reflected by our planet, taking into account several scenarios regarding the possible distribution of purple bacteria over continents and oceans. We find that purple bacteria have a reflectance spectrum that has a strong reflectivity increase, similar to the red edge of leafy plants, although shifted redward. This feature produces a detectable signal in the disk-averaged spectra of our planet, depending on cloud amount and purple bacteria concentration/distribution. We conclude that by using multi-color photometric observations, it is possible to distinguish between an Archean Earth in which purple bacteria inhabit vast extensions of the planet and a present-day Earth with continents covered by deserts, vegetation, or microbial mats. Copyright (Copyright) 2014. The American Astronomical Society. All rights reserved. JF - The Astrophysical Journal AU - Sanroma, E AU - Palle, E AU - Parenteau, M N AU - Kiang, N Y AU - Gutierrez-Navarro, A M AU - Lopez, R AU - Montanes-Rodriguez, P Y1 - 2014/01/01/ PY - 2014 DA - 2014 Jan 01 EP - Paper no. 52 PB - IOP Publishing for American Astronomical Society, Bristol VL - 780 IS - 1 SN - 0004-637X, 0004-637X KW - albedo KW - photosynthesis KW - near-infrared spectra KW - optical spectra KW - astrobiology KW - microbial mats KW - vegetation KW - simulation KW - deserts KW - photometry KW - Archean KW - spectra KW - radiative transfer KW - sedimentary structures KW - clouds KW - surface properties KW - Earth KW - Precambrian KW - extrasolar planets KW - biogenic structures KW - photochemistry KW - atmosphere KW - purple bacteria KW - biomarkers KW - terrestrial planets KW - models KW - planets KW - physical properties KW - optical properties KW - bacteria KW - reflectance KW - microorganisms KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832583956?accountid=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=Characterizing+the+purple+Earth%3B+modeling+the+globally+integrated+spectral+variability+of+the+Archean+Earth&rft.au=Sanroma%2C+E%3BPalle%2C+E%3BParenteau%2C+M+N%3BKiang%2C+N+Y%3BGutierrez-Navarro%2C+A+M%3BLopez%2C+R%3BMontanes-Rodriguez%2C+P&rft.aulast=Sanroma&rft.aufirst=E&rft.date=2014-01-01&rft.volume=780&rft.issue=1&rft.spage=&rft.isbn=&rft.btitle=&rft.title=The+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F780%2F1%2F52 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 - 81 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - albedo; Archean; astrobiology; atmosphere; bacteria; biogenic structures; biomarkers; clouds; deserts; Earth; extrasolar planets; microbial mats; microorganisms; models; near-infrared spectra; optical properties; optical spectra; photochemistry; photometry; photosynthesis; physical properties; planets; Precambrian; purple bacteria; radiative transfer; reflectance; sedimentary structures; simulation; spectra; surface properties; terrestrial planets; vegetation DO - http://dx.doi.org/10.1088/0004-637X/780/1/52 ER - TY - JOUR T1 - Hydrogen production and habitability in non-ultramafic geologic systems AN - 1832583473; 697186-41 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Fristad, Kirsten E AU - Som, Sanjoy M AU - Hoehler, Tori M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 741 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - serpentinization KW - igneous rocks KW - Lassen Volcanic National Park KW - ecosystems KW - metasomatism KW - California KW - Oregon KW - plutonic rocks KW - water-rock interaction KW - Yellowstone National Park KW - springs KW - dihydrogen KW - Mono County California KW - metabolism KW - host rocks KW - surface water KW - Long Valley Caldera KW - ultramafics KW - measurement KW - models KW - Idaho Batholith KW - Cascade Range KW - hydrogen KW - biosphere KW - field studies KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832583473?accountid=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=Hydrogen+production+and+habitability+in+non-ultramafic+geologic+systems&rft.au=Fristad%2C+Kirsten+E%3BSom%2C+Sanjoy+M%3BHoehler%2C+Tori+M%3BAnonymous&rft.aulast=Fristad&rft.aufirst=Kirsten&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=741&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 in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - biosphere; California; Cascade Range; dihydrogen; ecosystems; field studies; host rocks; hydrogen; Idaho Batholith; igneous rocks; Lassen Volcanic National Park; Long Valley Caldera; measurement; metabolism; metasomatism; models; Mono County California; Oregon; plutonic rocks; serpentinization; springs; surface water; ultramafics; United States; water-rock interaction; Yellowstone National Park ER - TY - JOUR T1 - Geologic history of Asteroid 4 Vesta AN - 1815669659; 2016-073566 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Mittlefehldt, David W AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1705 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - magnesium KW - stony meteorites KW - asteroids KW - isotopes KW - igneous rocks KW - Mg-26 KW - mafic composition KW - harzburgite KW - thermal history KW - stable isotopes KW - meteorites KW - plutonic rocks KW - howardite KW - boundary layer KW - plutons KW - alkaline earth metals KW - magma oceans KW - Vesta Asteroid KW - homogenization KW - differentiation KW - sills KW - achondrites KW - ultramafics KW - intrusions KW - dikes KW - metals KW - magmas KW - peridotites KW - eucrite KW - crystallization KW - crust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815669659?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Geologic+history+of+Asteroid+4+Vesta&rft.au=Mittlefehldt%2C+David+W%3BAnonymous&rft.aulast=Mittlefehldt&rft.aufirst=David&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1705&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 - 5 N1 - Last updated - 2016-09-01 N1 - SubjectsTermNotLitGenreText - achondrites; alkaline earth metals; asteroids; boundary layer; crust; crystallization; differentiation; dikes; eucrite; harzburgite; homogenization; howardite; igneous rocks; intrusions; isotopes; mafic composition; magma oceans; magmas; magnesium; metals; meteorites; Mg-26; peridotites; plutonic rocks; plutons; sills; stable isotopes; stony meteorites; thermal history; ultramafics; Vesta Asteroid ER - TY - JOUR T1 - Compositional diversity of the Vestan regolith derived from howardite compositions and Dawn VIR spectra AN - 1815669404; 2016-073567 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Mittlefehldt, David W AU - Ammannito, E AU - Hiroi, T AU - De Angelis, S AU - Moriarty, D P AU - Di Iorio, T AU - Pieters, C M AU - De Sanctis, M C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1706 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - calcium KW - alkaline earth metals KW - stony meteorites KW - asteroids KW - Vesta Asteroid KW - mapping KW - Dawn Mission KW - achondrites KW - infrared spectra KW - meteorites KW - quantitative analysis KW - howardite KW - metals KW - aluminum KW - composition KW - spectra KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815669404?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Compositional+diversity+of+the+Vestan+regolith+derived+from+howardite+compositions+and+Dawn+VIR+spectra&rft.au=Mittlefehldt%2C+David+W%3BAmmannito%2C+E%3BHiroi%2C+T%3BDe+Angelis%2C+S%3BMoriarty%2C+D+P%3BDi+Iorio%2C+T%3BPieters%2C+C+M%3BDe+Sanctis%2C+M+C%3BAnonymous&rft.aulast=Mittlefehldt&rft.aufirst=David&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1706&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 - 6 N1 - Last updated - 2016-09-01 N1 - SubjectsTermNotLitGenreText - achondrites; alkaline earth metals; aluminum; asteroids; calcium; composition; Dawn Mission; howardite; infrared spectra; mapping; metals; meteorites; quantitative analysis; regolith; spectra; stony meteorites; Vesta Asteroid ER - TY - JOUR T1 - Measuring the habitability potential of Mars; an evolving state of the art AN - 1812220420; 2016-071763 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Conrad, Pamela G AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 451 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - terrestrial planets KW - surface properties KW - planets KW - physical properties KW - habitability potential KW - chemical properties KW - Mars KW - thermodynamic properties KW - kinetics KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812220420?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Measuring+the+habitability+potential+of+Mars%3B+an+evolving+state+of+the+art&rft.au=Conrad%2C+Pamela+G%3BAnonymous&rft.aulast=Conrad&rft.aufirst=Pamela&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=451&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 - 3 N1 - Last updated - 2016-08-18 N1 - SubjectsTermNotLitGenreText - chemical properties; habitability potential; kinetics; Mars; physical properties; planets; surface properties; terrestrial planets; thermodynamic properties ER - TY - JOUR T1 - Light absorbing carbonaceous aerosols; sources, spatial distributions, and impacts AN - 1812210071; 2016-071728 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Chin, Mian AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 416 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - carbonaceous composition KW - biomass KW - atmosphere KW - properties KW - simulation KW - environmental effects KW - climate change KW - urban environment KW - measurement KW - models KW - fires KW - spatial distribution KW - carbon KW - aerosols KW - organic carbon KW - heterogeneity KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812210071?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Light+absorbing+carbonaceous+aerosols%3B+sources%2C+spatial+distributions%2C+and+impacts&rft.au=Chin%2C+Mian%3BAnonymous&rft.aulast=Chin&rft.aufirst=Mian&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=416&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-08-18 N1 - SubjectsTermNotLitGenreText - aerosols; atmosphere; biomass; carbon; carbonaceous composition; climate change; environmental effects; fires; heterogeneity; measurement; models; organic carbon; properties; simulation; spatial distribution; urban environment ER - TY - JOUR T1 - Integration of stable carbon isotope, microbial community, dissolved hydrogen gas, and (super 2) H (sub H2O) tracer data to assess bioaugmentation for chlorinated ethene degradation in fractured rocks AN - 1800393046; 2016-054648 AB - An in situ bioaugmentation (BA) experiment was conducted to understand processes controlling microbial dechlorination of trichloroethene (TCE) in groundwater at the Naval Air Warfare Center (NAWC), West Trenton, NJ. In the BA experiment, an electron donor (emulsified vegetable oil and sodium lactate) and a chloro-respiring microbial consortium were injected into a well in fractured mudstone of Triassic age. Water enriched in (super 2) H was also injected as a tracer of the BA solution, to monitor advective transport processes. The changes in concentration and the delta (super 13) C of TCE, cis-dichloroethene (cis-DCE), and vinyl chloride (VC); the delta (super 2) H of water; changes in the abundance of the microbial communities; and the concentration of dissolved H (sub 2) gas compared to pre-test conditions, provided multiple lines of evidence that enhanced biodegradation occurred in the injection well and in two downgradient wells. For those wells where the biodegradation was stimulated intensively, the sum of the molar chlorinated ethene (CE) concentrations in post-BA water was higher than that of the sum of the pre-BA background molar CE concentrations. The concentration ratios of TCE/(cis-DCE+VC) indicated that the increase in molar CE concentration may result from additional TCE mobilized from the rock matrix in response to the oil injection or due to desorption/diffusion. The stable carbon isotope mass-balance calculations show that the weighted average (super 13) C isotope of the CEs was enriched for around a year compared to the background value in a two year monitoring period, an effective indication that dechlorination of VC was occurring. Insights gained from this study can be applied to efforts to use BA in other fractured rock systems. The study demonstrates that a BA approach can substantially enhance in situ bioremediation not only in fractures connected to the injection well, but also in the rock matrix around the well due to processes such as diffusion and desorption. Because the effect of the BA was intensive only in wells where an amendment was distributed during injection, it is necessary to adequately distribute the amendments throughout the fractured rock to achieve substantial bioremediation. The slowdown in BA effect after a year is due to some extend to the decrease abundant of appropriate microbes, but more likely the decreased concentration of electron donor. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Contaminant Hydrology AU - Revesz, Kinga M AU - Sherwood Lollar, Barbara AU - Kirshtein, Julie D AU - Tiedeman, Claire R AU - Imbrigiotta, Thomas E AU - Goode, Daniel J AU - Shapiro, Allen M AU - Voytek, Mary A AU - Lacombe, Pierre J AU - Busenberg, Eurybiades Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 62 EP - 77 PB - Elsevier, Amsterdam VL - 156 SN - 0169-7722, 0169-7722 KW - United States KW - fractured materials KW - chlorinated hydrocarbons KW - isotopes KW - gas chromatograms KW - mass spectra KW - ecosystems KW - stable isotopes KW - reservoir rocks KW - ground water KW - sedimentary rocks KW - carbon KW - tracers KW - halogenated hydrocarbons KW - spectra KW - water pollution KW - Trenton New Jersey KW - Naval Air Warfare Center KW - biodegradation KW - experimental studies KW - in situ KW - gaseous phase KW - pollutants KW - isotope ratios KW - C-13/C-12 KW - dehalogenation KW - pollution KW - aquifers KW - organic compounds KW - Mercer County New Jersey KW - D/H KW - hydrogen KW - dechlorination KW - chromatograms KW - bacteria KW - chlorinated ethene KW - testing KW - reservoir properties KW - New Jersey KW - microorganisms KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800393046?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Integration+of+stable+carbon+isotope%2C+microbial+community%2C+dissolved+hydrogen+gas%2C+and+%28super+2%29+H+%28sub+H2O%29+tracer+data+to+assess+bioaugmentation+for+chlorinated+ethene+degradation+in+fractured+rocks&rft.au=Revesz%2C+Kinga+M%3BSherwood+Lollar%2C+Barbara%3BKirshtein%2C+Julie+D%3BTiedeman%2C+Claire+R%3BImbrigiotta%2C+Thomas+E%3BGoode%2C+Daniel+J%3BShapiro%2C+Allen+M%3BVoytek%2C+Mary+A%3BLacombe%2C+Pierre+J%3BBusenberg%2C+Eurybiades&rft.aulast=Revesz&rft.aufirst=Kinga&rft.date=2014-01-01&rft.volume=156&rft.issue=&rft.spage=62&rft.isbn=&rft.btitle=&rft.title=Journal+of+Contaminant+Hydrology&rft.issn=01697722&rft_id=info:doi/10.1016%2Fj.jconhyd.2013.10.004 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 - 80 N1 - Document feature - illus. incl. 1 table, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - aquifers; bacteria; biodegradation; C-13/C-12; carbon; chlorinated ethene; chlorinated hydrocarbons; chromatograms; D/H; dechlorination; dehalogenation; ecosystems; experimental studies; fractured materials; gas chromatograms; gaseous phase; ground water; halogenated hydrocarbons; hydrogen; in situ; isotope ratios; isotopes; mass spectra; Mercer County New Jersey; microorganisms; Naval Air Warfare Center; New Jersey; organic compounds; pollutants; pollution; reservoir properties; reservoir rocks; sedimentary rocks; spectra; stable isotopes; testing; tracers; Trenton New Jersey; United States; water pollution DO - http://dx.doi.org/10.1016/j.jconhyd.2013.10.004 ER - TY - JOUR T1 - The superaggregate form of soot from wildfires and its impact on direct forcing AN - 1793205855; 2016-048268 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Chakrabarty, Rajan K AU - Beres, Nicholas D AU - Moosmueller, Hans AU - China, Swarup AU - Mazzoleni, Claudio AU - Dubey, Manvendra K AU - Liu, Li AU - Mishchenko, Michael I AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 374 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - global change KW - New Mexico KW - India KW - air pollution KW - soot KW - fires KW - California KW - monsoons KW - Mexico state KW - melting KW - Indian Peninsula KW - Federal District Mexico KW - Asia KW - fractals KW - global warming KW - patterns KW - Mexico City Mexico KW - pollution KW - glaciers KW - atmosphere KW - models KW - physical properties KW - Mexico KW - particles KW - public health KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793205855?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=The+superaggregate+form+of+soot+from+wildfires+and+its+impact+on+direct+forcing&rft.au=Chakrabarty%2C+Rajan+K%3BBeres%2C+Nicholas+D%3BMoosmueller%2C+Hans%3BChina%2C+Swarup%3BMazzoleni%2C+Claudio%3BDubey%2C+Manvendra+K%3BLiu%2C+Li%3BMishchenko%2C+Michael+I%3BAnonymous&rft.aulast=Chakrabarty&rft.aufirst=Rajan&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=374&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-06-02 N1 - SubjectsTermNotLitGenreText - air pollution; Asia; atmosphere; California; Federal District Mexico; fires; fractals; glaciers; global change; global warming; India; Indian Peninsula; melting; Mexico; Mexico City Mexico; Mexico state; models; monsoons; New Mexico; particles; patterns; physical properties; pollution; public health; soot; United States ER - TY - JOUR T1 - Mechanisms of microbial carbon sequestration in the ocean; future research directions AN - 1773797887; 2016-022556 AB - This paper reviews progress on understanding biological carbon sequestration in the ocean with special reference to the microbial formation and transformation of recalcitrant dissolved organic carbon (RDOC), the microbial carbon pump (MCP). We propose that RDOC is a concept with a wide continuum of recalcitrance. Most RDOC compounds maintain their levels of recalcitrance only in a specific environmental context (RDOC (sub t) ). The ocean RDOC pool also contains compounds that may be inaccessible to microbes due to their extremely low concentration (RDOC (sub c) ). This differentiation allows us to appreciate the linkage between microbial source and RDOC composition on a range of temporal and spatial scales. Analyses of biomarkers and isotopic records show intensive MCP processes in the Proterozoic oceans when the MCP could have played a significant role in regulating climate. Understanding the dynamics of the MCP in conjunction with the better constrained biological pump (BP) over geological timescales could help to predict future climate trends. Integration of the MCP and the BP will require new research approaches and opportunities. Major goals include understanding the interactions between particulate organic carbon (POC) and RDOC that contribute to sequestration efficiency, and the concurrent determination of the chemical composition of organic carbon, microbial community composition and enzymatic activity. Molecular biomarkers and isotopic tracers should be employed to link water column processes to sediment records, as well as to link present-day observations to paleo-evolution. Ecosystem models need to be developed based on empirical relationships derived from bioassay experiments and field investigations in order to predict the dynamics of carbon cycling along the stability continuum of POC and RDOC under potential global change scenarios. We propose that inorganic nutrient input to coastal waters may reduce the capacity for carbon sequestration as RDOC. The nutrient regime enabling maximum carbon storage from combined POC flux and RDOC formation should therefore be sought. JF - Biogeosciences AU - Jiao, N AU - Robinson, C AU - Azam, F AU - Thomas, H AU - Baltar, F AU - Dang, H AU - Hardman-Mountford, N J AU - Johnson, M AU - Kirchman, D L AU - Koch, B P AU - Legendre, L AU - Li, C AU - Liu, J AU - Luo, T AU - Luo, Y W AU - Mitra, A AU - Romanou, A AU - Tang, K AU - Wang, X AU - Zhang, C AU - Zhang, R Y1 - 2014 PY - 2014 DA - 2014 SP - 5285 EP - 5306 PB - Copernicus GmbH on behalf of the European Union, Katlenburg-Lindau VL - 11 IS - 19 SN - 1726-4170, 1726-4170 KW - respiration KW - paleo-oceanography KW - mechanism KW - global change KW - paleoclimatology KW - climate change KW - paleoecology KW - environmental management KW - future KW - carbon KW - particulate materials KW - organic carbon KW - climate KW - processes KW - surface properties KW - monitoring KW - sea surface water KW - human activity KW - biochemistry KW - trophic analysis KW - solutes KW - bioassays KW - current research KW - nutrients KW - models KW - nutrition KW - marine environment KW - coastal environment KW - acidification KW - carbon cycle KW - microorganisms KW - sea water KW - upper Precambrian KW - ecosystems KW - environmental effects KW - controls KW - biological pump KW - tracers KW - ecology KW - microbial carbon pump KW - chemical composition KW - geochemistry KW - productivity KW - recalcitrance KW - concentration KW - carbon sequestration KW - Precambrian KW - geomicrobiology KW - Proterozoic KW - molecular biology KW - hydrochemistry KW - biomarkers KW - geochemical cycle KW - paleoenvironment KW - efficiency KW - transformations KW - storage KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773797887?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biogeosciences&rft.atitle=Mechanisms+of+microbial+carbon+sequestration+in+the+ocean%3B+future+research+directions&rft.au=Jiao%2C+N%3BRobinson%2C+C%3BAzam%2C+F%3BThomas%2C+H%3BBaltar%2C+F%3BDang%2C+H%3BHardman-Mountford%2C+N+J%3BJohnson%2C+M%3BKirchman%2C+D+L%3BKoch%2C+B+P%3BLegendre%2C+L%3BLi%2C+C%3BLiu%2C+J%3BLuo%2C+T%3BLuo%2C+Y+W%3BMitra%2C+A%3BRomanou%2C+A%3BTang%2C+K%3BWang%2C+X%3BZhang%2C+C%3BZhang%2C+R&rft.aulast=Jiao&rft.aufirst=N&rft.date=2014-01-01&rft.volume=11&rft.issue=19&rft.spage=5285&rft.isbn=&rft.btitle=&rft.title=Biogeosciences&rft.issn=17264170&rft_id=info:doi/ L2 - http://www.biogeosciences.net/11/5285/2014/bg-11-5285-2014.pdf http://www.biogeosciences.net LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 205 N1 - Document feature - illus. N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - acidification; bioassays; biochemistry; biological pump; biomarkers; carbon; carbon cycle; carbon sequestration; chemical composition; climate; climate change; coastal environment; concentration; controls; current research; ecology; ecosystems; efficiency; environmental effects; environmental management; future; geochemical cycle; geochemistry; geomicrobiology; global change; human activity; hydrochemistry; marine environment; mechanism; microbial carbon pump; microorganisms; models; molecular biology; monitoring; nutrients; nutrition; organic carbon; paleo-oceanography; paleoclimatology; paleoecology; paleoenvironment; particulate materials; Precambrian; processes; productivity; Proterozoic; recalcitrance; respiration; sea surface water; sea water; solutes; storage; surface properties; tracers; transformations; trophic analysis; upper Precambrian ER - TY - JOUR T1 - Strong response in absorption by black carbon to hygroscopic growth AN - 1765876802; 2016-011337 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Fierce, Laura AU - Mena, Francisco AU - Bond, Tami AU - Riemer, Nicole AU - Bauer, Susanne AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 695 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - models KW - absorption KW - relative humidity KW - black carbon KW - aerosols KW - chemical composition KW - climate KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765876802?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Strong+response+in+absorption+by+black+carbon+to+hygroscopic+growth&rft.au=Fierce%2C+Laura%3BMena%2C+Francisco%3BBond%2C+Tami%3BRiemer%2C+Nicole%3BBauer%2C+Susanne%3BAnonymous&rft.aulast=Fierce&rft.aufirst=Laura&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=695&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 - Document feature - sketch maps N1 - Last updated - 2016-02-18 N1 - SubjectsTermNotLitGenreText - absorption; aerosols; black carbon; chemical composition; climate; models; relative humidity ER - TY - JOUR T1 - Observed and simulated black carbon and absorption profiles during the TCAP campaign AN - 1765873793; 2016-011312 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Fast, Jerome AU - Berg, Larry AU - Chand, Duli AU - Liu, Ying AU - Sedlacek, Art AU - Ferrare, Richard AU - Hostetler, Chris AU - Mueller, Detlef AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 670 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - high-resolution methods KW - Cape Cod KW - laser methods KW - three-dimensional models KW - global KW - solar forcing KW - properties KW - simulation KW - variations KW - observations KW - measurement KW - models KW - absorption KW - Barnstable County Massachusetts KW - lidar methods KW - black carbon KW - Massachusetts KW - mixing KW - aerosols KW - climate forcing KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873793?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Observed+and+simulated+black+carbon+and+absorption+profiles+during+the+TCAP+campaign&rft.au=Fast%2C+Jerome%3BBerg%2C+Larry%3BChand%2C+Duli%3BLiu%2C+Ying%3BSedlacek%2C+Art%3BFerrare%2C+Richard%3BHostetler%2C+Chris%3BMueller%2C+Detlef%3BAnonymous&rft.aulast=Fast&rft.aufirst=Jerome&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=670&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 - absorption; aerosols; Barnstable County Massachusetts; black carbon; Cape Cod; climate forcing; global; high-resolution methods; laser methods; lidar methods; Massachusetts; measurement; mixing; models; observations; properties; simulation; solar forcing; three-dimensional models; United States; variations ER - TY - JOUR T1 - NASA's Mars 2020 rover mission AN - 1765873736; 2016-011305 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Farley, K A AU - Schulte, M AU - Beaty, D AU - Bass, D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 663 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - terrestrial planets KW - programs KW - planets KW - sampling KW - NASA KW - government agencies KW - Mars KW - cores KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873736?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=NASA%27s+Mars+2020+rover+mission&rft.au=Farley%2C+K+A%3BSchulte%2C+M%3BBeaty%2C+D%3BBass%2C+D%3BAnonymous&rft.aulast=Farley&rft.aufirst=K&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=663&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/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 - cores; government agencies; Mars; NASA; planets; programs; sampling; terrestrial planets ER - TY - JOUR T1 - Signs Of Life Detector (SOLID); searching for evidence of past life on Mars AN - 1756507790; 2016-004271 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Parro, V AU - Stoker, Carol AU - Davila, A F AU - Quinn, Richard C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2653 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - lipids KW - astrobiology KW - Mars KW - Signs of Life Detector KW - biomarkers KW - terrestrial planets KW - planets KW - meteorites KW - organic compounds KW - organic acids KW - detection KW - carbon KW - amino acids KW - immunoassays KW - hydrocarbons KW - polycyclic aromatic hydrocarbons KW - organic carbon KW - instruments KW - aromatic hydrocarbons KW - SOLID instrument KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756507790?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Signs+Of+Life+Detector+%28SOLID%29%3B+searching+for+evidence+of+past+life+on+Mars&rft.au=Parro%2C+V%3BStoker%2C+Carol%3BDavila%2C+A+F%3BQuinn%2C+Richard+C%3BAnonymous&rft.aulast=Parro&rft.aufirst=V&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2653.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Aug. 4, 2015 N1 - Last updated - 2016-06-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - amino acids; aromatic hydrocarbons; astrobiology; biomarkers; carbon; detection; hydrocarbons; immunoassays; instruments; lipids; Mars; meteorites; organic acids; organic carbon; organic compounds; planets; polycyclic aromatic hydrocarbons; Signs of Life Detector; SOLID instrument; terrestrial planets ER - TY - JOUR T1 - The tethered Moon AN - 1752578419; 2016-002744 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Zahnle, Kevin J AU - Lupu, R E AU - Dobrovolskis, A R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2818 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - water KW - angular momentum KW - Moon KW - mantle KW - atmosphere KW - impacts KW - temperature KW - nitrogen KW - carbon dioxide KW - genesis KW - carbon monoxide KW - viscosity KW - cooling KW - sulfur KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752578419?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+tethered+Moon&rft.au=Zahnle%2C+Kevin+J%3BLupu%2C+R+E%3BDobrovolskis%2C+A+R%3BAnonymous&rft.aulast=Zahnle&rft.aufirst=Kevin&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2818&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 - 2015-12-31 N1 - SubjectsTermNotLitGenreText - angular momentum; atmosphere; carbon dioxide; carbon monoxide; cooling; genesis; impacts; mantle; Moon; nitrogen; sulfur; temperature; viscosity; water ER - TY - JOUR T1 - Nondestructive analysis of Apollo samples by micro-CT and micro-XRF analysis; a PET style examination AN - 1752577866; 2016-000469 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Zeigler, Ryan A AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2665 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - tomography KW - breccia KW - impactites KW - X-ray fluorescence KW - Moon KW - preliminary examination team KW - lunar breccia KW - Apollo Program KW - impact breccia KW - non-destructive methods KW - Sample 14305 KW - Sample 14321 KW - lunar samples KW - computed tomography KW - metamorphic rocks KW - micro-CT KW - Apollo 14 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752577866?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Nondestructive+analysis+of+Apollo+samples+by+micro-CT+and+micro-XRF+analysis%3B+a+PET+style+examination&rft.au=Zeigler%2C+Ryan+A%3BAnonymous&rft.aulast=Zeigler&rft.aufirst=Ryan&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/2665.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 - 3 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Apr. 14, 2015 N1 - Last updated - 2016-05-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Apollo 14; Apollo Program; breccia; computed tomography; impact breccia; impactites; lunar breccia; lunar samples; metamorphic rocks; micro-CT; Moon; non-destructive methods; preliminary examination team; Sample 14305; Sample 14321; tomography; X-ray fluorescence ER - TY - JOUR T1 - Mapping variations in sediment thickness in the Chryse impact basin using quasi-circular depressions from MOLA data AN - 1752576844; 2016-002507 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Miller, Moira K AU - Frey, Herbert V AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 1102 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - impact features KW - Mars KW - mapping KW - variations KW - terrestrial planets KW - planets KW - sediments KW - depressions KW - basins KW - thickness KW - MOLA KW - impact craters KW - Chryse Planitia KW - buried features KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576844?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mapping+variations+in+sediment+thickness+in+the+Chryse+impact+basin+using+quasi-circular+depressions+from+MOLA+data&rft.au=Miller%2C+Moira+K%3BFrey%2C+Herbert+V%3BAnonymous&rft.aulast=Miller&rft.aufirst=Moira&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/1102.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 8 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jun. 30, 2015 N1 - Last updated - 2015-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - basins; buried features; Chryse Planitia; depressions; impact craters; impact features; mapping; Mars; MOLA; planets; sediments; terrestrial planets; thickness; variations ER - TY - JOUR T1 - Diagenetic features in Yellowknife Bay, Gale Crater, Mars; implications for substrate rheology and potential gas release AN - 1734269502; 2015-087446 AB - Multiple diagenetic features have been observed in clay-bearing mudstone exposed within Yellowknife Bay, Gale Crater, Mars. These features occurred during at least two separate episodes: an early generation of spheroidal concretions that co-occur with a dense networks of mineralized fractures, and a later generation of mineralized veins. Concretions consist of mm-sized spheroids (0.4 to 8.0 mm, mean diameter of 1.2 mm) that are distinctly more resistant than the encompassing mudstone. Dissected spheroids suggest an origin via compaction and incipient lithification of the substrate at the perimeter of syndepositional void space. Concretions are generally patchy in their distribution within clay-bearing mudstone, but in places can be the dominant fabric element. Locally dense networks of mineralized fractures occur in regions of low concretion abundance. These consist of short (< 50 cm), curvilinear to planar mineralized voids that occur across a range of orientations from vertical to subhorizontal. Fractures are filled by multi-phase cement consisting of two isopachous, erosionally resistant outer bands, and a central less resistant fill. Physical relationships suggests that original fractures may have formed as both interconnected voids and as discrete cross-cutting features. Co-occurrence of early diagenetic concretions and fracture networks suggests a common origin via gas release within a subaqueous, shallow substrate. We suggest that gas release within weakly cohesive subsurface sediments resulted in substrate dewatering and an increase in the cohesive strength of the substrate. Local differences in substrate strength and rate of gas production would have result in formation of either discrete voids or fracture networks. A second generation of mineralized veins is characterized by a regionally low spatial density, predominantly vertical or horizontal orientations, and a single phase of Ca-sulfate mineral fill. These veins cross-cut the early diagenetic elements and intersect a greater thickness of stratigraphy within Yellowknife Bay, suggesting a later-diagenetic origin via hydraulic fracturing. JF - Abstracts: Annual Meeting - American Association of Petroleum Geologists AU - Kah, Linda C AU - Stack, Katie AU - Siebach, Kirsten AU - Grotzinger, John AU - Sumner, Dawn AU - Fairen, Alberto AU - Oehler, Dorothy AU - Schieber, Juergen AU - Leveille, Richard AU - Edgar, Lauren AU - Rice, Melissa AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 PB - American Association of Petroleum Geologists and Society for Sedimentary Geology, Tulsa, OK VL - 2014 KW - Yellowknife Bay KW - secondary structures KW - mudstone KW - gaseous phase KW - Mars KW - fracturing KW - veins KW - Gale Crater KW - terrestrial planets KW - substrates KW - planets KW - fractures KW - concretions KW - sedimentary rocks KW - rheology KW - diagenesis KW - mineralization KW - dehydration KW - sedimentary structures KW - clastic rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734269502?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Diagenetic+features+in+Yellowknife+Bay%2C+Gale+Crater%2C+Mars%3B+implications+for+substrate+rheology+and+potential+gas+release&rft.au=Kah%2C+Linda+C%3BStack%2C+Katie%3BSiebach%2C+Kirsten%3BGrotzinger%2C+John%3BSumner%2C+Dawn%3BFairen%2C+Alberto%3BOehler%2C+Dorothy%3BSchieber%2C+Juergen%3BLeveille%2C+Richard%3BEdgar%2C+Lauren%3BRice%2C+Melissa%3BAnonymous&rft.aulast=Kah&rft.aufirst=Linda&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/1839718.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 - Last updated - 2015-11-19 N1 - CODEN - #06983 N1 - SubjectsTermNotLitGenreText - clastic rocks; concretions; dehydration; diagenesis; fractures; fracturing; Gale Crater; gaseous phase; Mars; mineralization; mudstone; planets; rheology; secondary structures; sedimentary rocks; sedimentary structures; substrates; terrestrial planets; veins; Yellowknife Bay ER - TY - JOUR T1 - Constraints on transport and emplacement mechanisms of labile fractions in lunar cold traps AN - 1734269025; 2015-111501 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Rickman, Doug AU - Gertsch, L AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2695 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - water KW - Moon KW - Cabeus Crater KW - Lunar Crater observation and Sensing Satellite KW - GRAIL KW - impacts KW - LCROSS Mission KW - cold traps KW - volatiles KW - neutrons KW - hypervelocity impacts KW - transport KW - deposition KW - epithermal neutrons KW - Gravity Recovery and Interior Laboratory KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734269025?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Constraints+on+transport+and+emplacement+mechanisms+of+labile+fractions+in+lunar+cold+traps&rft.au=Rickman%2C+Doug%3BGertsch%2C+L%3BAnonymous&rft.aulast=Rickman&rft.aufirst=Doug&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/2695.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 - 21 N1 - PubXState - TX N1 - SuppNotes - Accessed on Apr. 7, 2015 N1 - Last updated - 2015-11-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Cabeus Crater; cold traps; deposition; epithermal neutrons; GRAIL; Gravity Recovery and Interior Laboratory; hypervelocity impacts; impacts; LCROSS Mission; Lunar Crater observation and Sensing Satellite; Moon; neutrons; regolith; transport; volatiles; water ER - TY - JOUR T1 - SOFIA FORCAST far-IR photometry of Comet ISON and constraints on the coma size distribution AN - 1734266424; 2015-108211 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Wooden, D H AU - de Buizer, J M AU - Kelley, M S AU - Woodward, C E AU - Harker, D E AU - Reach, W T AU - Sitko, M L AU - Russell, R W AU - Gehrz, R D AU - de Pater, Imke AU - Kolokolova, Ludmilla AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2906 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - Comet ISON KW - olivine group KW - far-infrared photometry KW - size distribution KW - photometry KW - pyroxene group KW - mineral composition KW - carbon KW - olivine KW - orthosilicates KW - thermal emission KW - Oort cloud KW - chain silicates KW - amorphous materials KW - FORCAST instrument KW - grain size KW - Stratospheric Observatory for Infrared Astronomy KW - porosity KW - comae KW - nesosilicates KW - models KW - comets KW - cometary dust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734266424?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=SOFIA+FORCAST+far-IR+photometry+of+Comet+ISON+and+constraints+on+the+coma+size+distribution&rft.au=Wooden%2C+D+H%3Bde+Buizer%2C+J+M%3BKelley%2C+M+S%3BWoodward%2C+C+E%3BHarker%2C+D+E%3BReach%2C+W+T%3BSitko%2C+M+L%3BRussell%2C+R+W%3BGehrz%2C+R+D%3Bde+Pater%2C+Imke%3BKolokolova%2C+Ludmilla%3BAnonymous&rft.aulast=Wooden&rft.aufirst=D&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/2906.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 Jun. 12, 2015 N1 - Last updated - 2015-11-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - amorphous materials; carbon; chain silicates; comae; Comet ISON; cometary dust; comets; far-infrared photometry; FORCAST instrument; grain size; mineral composition; models; nesosilicates; olivine; olivine group; Oort cloud; orthosilicates; photometry; porosity; pyroxene group; silicates; size distribution; Stratospheric Observatory for Infrared Astronomy; thermal emission ER - TY - JOUR T1 - Continuous venovenous hemodiafiltration along with charcoal hemoperfusion for the management of life-threatening lercanidipine and amlodipine overdose AN - 1732102115 AB - Overdose with calcium channel blockers is uncommon, but is associated with high mortality. The management includes fluid resuscitation, calcium gluconate, glucagon, vasopressors, and high-dose insulin-euglycemia therapy. We describe a rare case of massive overdose of lercanidipine with shock, refractory to conventional therapies and multi-organ failure. Charcoal hemoperfusion with continuous venovenous hemodiafiltration was then used successfully and the patient showed remarkable recovery. JF - Saudi Journal of Kidney Diseases and Transplantation AU - Nasa, Prashant AU - Singh, Akhilesh AU - Juneja, Deven AU - Singh, Omender AU - Javeri, Yash Y1 - 2014 PY - 2014 DA - 2014 CY - Riyadh PB - Medknow Publications & Media Pvt. Ltd. VL - 25 IS - 6 SN - 13192442 KW - Medical Sciences--Urology And Nephrology KW - Drug overdose KW - Rodents KW - Cardiovascular disease KW - Proteins KW - Metabolism KW - Drug dosages KW - Metabolites KW - Urine KW - Dopamine KW - Mortality KW - Insulin KW - Polyethylene glycol KW - Smooth muscle KW - Charcoal UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732102115?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthcompleteshell&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=Saudi+Journal+of+Kidney+Diseases+and+Transplantation&rft.atitle=Continuous+venovenous+hemodiafiltration+along+with+charcoal+hemoperfusion+for+the+management+of+life-threatening+lercanidipine+and+amlodipine+overdose&rft.au=Nasa%2C+Prashant%3BSingh%2C+Akhilesh%3BJuneja%2C+Deven%3BSingh%2C+Omender%3BJaveri%2C+Yash&rft.aulast=Nasa&rft.aufirst=Prashant&rft.date=2014-01-01&rft.volume=25&rft.issue=6&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Saudi+Journal+of+Kidney+Diseases+and+Transplantation&rft.issn=13192442&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - Copyright Medknow Publications & Media Pvt Ltd 2014 N1 - Last updated - 2015-11-18 ER - TY - JOUR T1 - Constraints on exposure ages of lunar and asteroidal regolith particles AN - 1729849592; 2015-103648 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Berger, Eve L AU - Keller, Lindsay P AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 180 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - processes KW - Itokawa Asteroid KW - asteroids KW - Moon KW - solar wind KW - techniques KW - electron microscopy data KW - Apollo Program KW - exposure age KW - weathering KW - TEM data KW - space weathering KW - Hayabusa Mission KW - particulate materials KW - weathering rates KW - regolith KW - particles KW - solar activity KW - lunar soils KW - Apollo 16 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729849592?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+exposure+ages+of+lunar+and+asteroidal+regolith+particles&rft.au=Berger%2C+Eve+L%3BKeller%2C+Lindsay+P%3BAnonymous&rft.aulast=Berger&rft.aufirst=Eve&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=180&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 - 2015-11-05 N1 - SubjectsTermNotLitGenreText - Apollo 16; Apollo Program; asteroids; electron microscopy data; exposure age; Hayabusa Mission; Itokawa Asteroid; lunar soils; Moon; particles; particulate materials; processes; regolith; solar activity; solar wind; space weathering; techniques; TEM data; weathering; weathering rates ER - TY - JOUR T1 - The role of endolithic cyanobacteria in stromatolite lithified laminae AN - 1729849507; 2015-103617 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Prufert-Bebout, Lee AU - Reid, R Pamela AU - Macintyre, Ian G AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 149 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - erosion KW - bioerosion KW - oolite KW - Australia KW - sedimentary structures KW - processes KW - cyanobacteria KW - borings KW - modern analogs KW - Exuma Sound KW - Australasia KW - laminations KW - biogenic structures KW - West Indies KW - Solentia KW - Caribbean region KW - Shark Bay KW - Highborne Cay KW - stromatolites KW - planar bedding structures KW - biogenic processes KW - Bahamas KW - North Atlantic KW - endolithic taxa KW - Atlantic Ocean KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729849507?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=The+role+of+endolithic+cyanobacteria+in+stromatolite+lithified+laminae&rft.au=Prufert-Bebout%2C+Lee%3BReid%2C+R+Pamela%3BMacintyre%2C+Ian+G%3BAnonymous&rft.aulast=Prufert-Bebout&rft.aufirst=Lee&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=149&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 - 2015-11-05 N1 - SubjectsTermNotLitGenreText - Atlantic Ocean; Australasia; Australia; Bahamas; bioerosion; biogenic processes; biogenic structures; borings; Caribbean region; cyanobacteria; endolithic taxa; erosion; Exuma Sound; Highborne Cay; laminations; modern analogs; North Atlantic; oolite; planar bedding structures; processes; sedimentary structures; Shark Bay; Solentia; stromatolites; West Indies ER - TY - JOUR T1 - Global assessment of aerosol-ice cloud interactions with the NASA Goddard Earth Observing System (GEOS-5) AN - 1729849339; 2015-103584 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Barahona, Donifan AU - Molod, Andrea AU - Nenes, Athanasios AU - Phillips, Vaughan AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 116 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - GEOS KW - clastic sediments KW - global KW - ice clouds KW - Goddard Earth Observing System KW - GEOS-5 KW - soot KW - dust KW - sediments KW - climate effects KW - aerosols KW - particles KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729849339?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Global+assessment+of+aerosol-ice+cloud+interactions+with+the+NASA+Goddard+Earth+Observing+System+%28GEOS-5%29&rft.au=Barahona%2C+Donifan%3BMolod%2C+Andrea%3BNenes%2C+Athanasios%3BPhillips%2C+Vaughan%3BAnonymous&rft.aulast=Barahona&rft.aufirst=Donifan&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=116&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 - aerosols; clastic sediments; climate effects; dust; GEOS; GEOS-5; global; Goddard Earth Observing System; ice clouds; particles; sediments; soot ER - TY - JOUR T1 - Training with oxygen; abiotic sources of reactive oxygen species on the early Earth AN - 1729848546; 2015-103573 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Balk, Melike AU - Mason, Paul AU - Stams, Alfons J M AU - Freund, Friedmann AU - Rothschild, Lynn AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 105 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - processes KW - anions KW - oxygen KW - igneous rocks KW - oxidation KW - hydrolysis KW - biologic evolution KW - weathering KW - metamorphic rocks KW - anaerobic environment KW - pyrite KW - reduction KW - sulfides KW - microorganisms KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729848546?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Training+with+oxygen%3B+abiotic+sources+of+reactive+oxygen+species+on+the+early+Earth&rft.au=Balk%2C+Melike%3BMason%2C+Paul%3BStams%2C+Alfons+J+M%3BFreund%2C+Friedmann%3BRothschild%2C+Lynn%3BAnonymous&rft.aulast=Balk&rft.aufirst=Melike&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=105&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 - 2015-11-05 N1 - SubjectsTermNotLitGenreText - anaerobic environment; anions; biologic evolution; hydrolysis; igneous rocks; metamorphic rocks; microorganisms; oxidation; oxygen; processes; pyrite; reduction; sulfides; weathering ER - TY - JOUR T1 - Evidence for mixotrophy and metabolic switching in chemotrophic hot spring microbial communities AN - 1729846796; 2015-105508 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Urschel, Matthew R AU - Kubo, Mike K AU - Hoehler, Tori M AU - Peters, John W AU - Boyd, Eric S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2535 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - communities KW - in situ KW - metabolism KW - solutes KW - rates KW - thermal waters KW - temperature KW - measurement KW - ground water KW - Wyoming KW - substrates KW - quantitative analysis KW - carbon KW - Yellowstone National Park KW - springs KW - mineralization KW - organic carbon KW - hot springs KW - chemosynthesis KW - pH KW - high temperature KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729846796?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Evidence+for+mixotrophy+and+metabolic+switching+in+chemotrophic+hot+spring+microbial+communities&rft.au=Urschel%2C+Matthew+R%3BKubo%2C+Mike+K%3BHoehler%2C+Tori+M%3BPeters%2C+John+W%3BBoyd%2C+Eric+S%3BAnonymous&rft.aulast=Urschel&rft.aufirst=Matthew&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2535&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 - carbon; chemosynthesis; communities; ground water; high temperature; hot springs; in situ; measurement; metabolism; mineralization; organic carbon; pH; quantitative analysis; rates; solutes; springs; substrates; temperature; thermal waters; United States; Wyoming; Yellowstone National Park ER - TY - JOUR T1 - Hydrocarbons on Mars; subtle signals at Yellowknife Bay AN - 1722155993; 2015-099875 AB - There has been much interest in the potential for Mars sedimentary rocks to host organic matter that, in turn, might hold clues to processes concerned with its formation, transport and preservation. Like the search for organics in ancient sediments on Earth, these endeavors are technically challenging because of the inherent instability of carbon compounds under conditions that exist in the regolith of both planets. Exposure to ionizing radiation and the heat associated with burial and tectonism are the main obstacles to organic matter preservation in early Earth sediments. On Mars, radiation and chemical oxidation are seen as the prime threats. Also, there could be diagenetic processes peculiar to Mars, for which no terrestrial analogs are presently known. Further, the presence of oxychlorine compounds that release O2 during pyrolysis could lead to combustion of organics during thermal desorption analyses. Fluvio-lacustrine sediments of Yellowknife Bay in Gale Crater, when analyzed by SAM using its pyrolysis with evolved gas analysis (EGA) and gas chromatography mass spectrometry (GC-MS) capability, have afforded suites of chlorohydrocarbons including chloromethane, dichloromethane, trichloromethane, chloromethylpropene, and chlorobenzene. It can be argued that known SAM instrument background, formed from organic materials within the chromatographic columns, hydrocarbon traps and wet chemistry capability of SAM, can react with gases released from hydrated perchlorates present in the sediments to yield the observed mixtures. However, two compounds, chloromethane and dichloromethane, were also identified by the GC-MS instruments on the 1976 Viking missions suggesting that some proportion of the observed organics could be derived from precursors present in the Mars regolith as supported from terrestrial analog studies. To address these alternatives, the SAM science team is devising and conducting experiments on Mars that involve varying how sediment samples are transferred to, and analyzed by, SAM. Simultaneously, we are conducting laboratory analog experiments to discriminate between the various possible sources of the chlorohydrocarbons identified so far. JF - Abstracts: Annual Meeting - American Association of Petroleum Geologists AU - Summons, Roger E AU - Glavin, Daniel P AU - Eigenbrode, Jennifer L AU - Freissinet, Caroline AU - Miller, Kristen E AU - Navarro-Gonzalez, Rafael AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 PB - American Association of Petroleum Geologists and Society for Sedimentary Geology, Tulsa, OK VL - 2014 KW - Yellowknife Bay KW - chlorinated hydrocarbons KW - chromatography KW - experimental studies KW - oxidation KW - SAM KW - Mars KW - Gale Crater KW - terrestrial planets KW - planets KW - gas chromatography KW - Sample Analysis at Mars KW - organic compounds KW - chemical reactions KW - sampling KW - pyrolysis KW - lacustrine environment KW - hydrocarbons KW - halogenated hydrocarbons KW - fluviolacustrine environment KW - fluvial environment KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722155993?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Hydrocarbons+on+Mars%3B+subtle+signals+at+Yellowknife+Bay&rft.au=Summons%2C+Roger+E%3BGlavin%2C+Daniel+P%3BEigenbrode%2C+Jennifer+L%3BFreissinet%2C+Caroline%3BMiller%2C+Kristen+E%3BNavarro-Gonzalez%2C+Rafael%3BAnonymous&rft.aulast=Summons&rft.aufirst=Roger&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/1840938.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 - Last updated - 2015-10-15 N1 - CODEN - #06983 N1 - SubjectsTermNotLitGenreText - chemical reactions; chlorinated hydrocarbons; chromatography; experimental studies; fluvial environment; fluviolacustrine environment; Gale Crater; gas chromatography; halogenated hydrocarbons; hydrocarbons; lacustrine environment; Mars; organic compounds; oxidation; planets; pyrolysis; regolith; SAM; Sample Analysis at Mars; sampling; terrestrial planets; Yellowknife Bay ER - TY - JOUR T1 - The 1500 m South Pole ice core; recovering a 40 ka environmental record AN - 1722152944; 2015-098015 AB - Supported by the US National Science Foundation, a new 1500 m, approximately 40 ka old ice core will be recovered from South Pole during the 2014/15 and 2015/16 austral summer seasons using the new US intermediate-depth drill. The combination of low temperatures, relatively high accumulation rates and low impurity concentrations at South Pole will yield detailed records of ice chemistry and trace atmospheric gases. The South Pole ice core will provide a climate history record of a unique area of the East Antarctic plateau that is partly influenced by weather systems that cross the West Antarctic ice sheet. The ice at South Pole flows at approximately 10 ma (super -1) and the South Pole ice-core site is a significant distance from an ice divide. Therefore, ice recovered at depth originated progressively farther upstream of the coring site. New ground-penetrating radar collected over the drill site location shows no anthropogenic influence over the past approximately 50 years or upper 15 m. Depth-age scale modeling results show consistent and plausible annual-layer thicknesses and accumulation rate histories, indicating that no significant stratigraphic disturbances exist in the upper 1500 m near the ice-core drill site. JF - Annals of Glaciology AU - Casey, Kimberly A AU - Fudge, T J AU - Neumann, T A AU - Steig, E J AU - Cavitte, M G P AU - Blankenship, D D AU - Wilhelms, Frank Y1 - 2014 PY - 2014 DA - 2014 SP - 137 EP - 146 PB - International Glaciological Society, Cambridge VL - 55 IS - 68 SN - 0260-3055, 0260-3055 KW - ice cores KW - Quaternary KW - interglacial environment KW - paleoclimatology KW - ice sheets KW - climate change KW - South Pole KW - Cenozoic KW - Antarctic ice sheet KW - paleoenvironment KW - Antarctica KW - glacial environment KW - glacial geology KW - drilling KW - instruments KW - design KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722152944?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annals+of+Glaciology&rft.atitle=The+1500+m+South+Pole+ice+core%3B+recovering+a+40+ka+environmental+record&rft.au=Casey%2C+Kimberly+A%3BFudge%2C+T+J%3BNeumann%2C+T+A%3BSteig%2C+E+J%3BCavitte%2C+M+G+P%3BBlankenship%2C+D+D%3BWilhelms%2C+Frank&rft.aulast=Casey&rft.aufirst=Kimberly&rft.date=2014-01-01&rft.volume=55&rft.issue=68&rft.spage=137&rft.isbn=&rft.btitle=&rft.title=Annals+of+Glaciology&rft.issn=02603055&rft_id=info:doi/10.3189%2F2014AoG68A016 L2 - http://www.igsoc.org/annals/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 70 N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2015-10-15 N1 - SubjectsTermNotLitGenreText - Antarctic ice sheet; Antarctica; Cenozoic; climate change; design; drilling; glacial environment; glacial geology; ice cores; ice sheets; instruments; interglacial environment; paleoclimatology; paleoenvironment; Quaternary; South Pole DO - http://dx.doi.org/10.3189/2014AoG68A016 ER - TY - JOUR T1 - Recycling of oceanic lithosphere; water, fO (sub 2) and Fe-isotope constraints AN - 1718053926; 2015-095323 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Bizimis, M AU - Peslier, Anne H AU - McCammon, Catherine A AU - Keshav, S AU - Williams, H M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 211 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - electrical conductivity KW - volcanic rocks KW - oxygen KW - isotopes KW - igneous rocks KW - oceanic lithosphere KW - mantle KW - qualitative analysis KW - stable isotopes KW - melts KW - iron KW - fugacity KW - variations KW - cerium KW - ferric iron KW - plutonic rocks KW - mineral composition KW - melting KW - cumulates KW - inclusions KW - basalts KW - rare earths KW - heterogeneity KW - xenoliths KW - water KW - garnet pyroxenite KW - pressure KW - lithosphere KW - isotope ratios KW - Hawaii KW - East Pacific Ocean Islands KW - high pressure KW - ultramafics KW - spinel peridotite KW - models KW - pyroxenite KW - metals KW - mid-ocean ridge basalts KW - peridotites KW - Oceania KW - Fe-57/Fe-54 KW - Polynesia KW - ocean-island basalts KW - 18:Solid-earth geophysics KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718053926?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Recycling+of+oceanic+lithosphere%3B+water%2C+fO+%28sub+2%29+and+Fe-isotope+constraints&rft.au=Bizimis%2C+M%3BPeslier%2C+Anne+H%3BMcCammon%2C+Catherine+A%3BKeshav%2C+S%3BWilliams%2C+H+M%3BAnonymous&rft.aulast=Bizimis&rft.aufirst=M&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=211&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 - 2015-10-01 N1 - SubjectsTermNotLitGenreText - basalts; cerium; cumulates; East Pacific Ocean Islands; electrical conductivity; Fe-57/Fe-54; ferric iron; fugacity; garnet pyroxenite; Hawaii; heterogeneity; high pressure; igneous rocks; inclusions; iron; isotope ratios; isotopes; lithosphere; mantle; melting; melts; metals; mid-ocean ridge basalts; mineral composition; models; ocean-island basalts; Oceania; oceanic lithosphere; oxygen; peridotites; plutonic rocks; Polynesia; pressure; pyroxenite; qualitative analysis; rare earths; spinel peridotite; stable isotopes; ultramafics; United States; variations; volcanic rocks; water; xenoliths ER - TY - JOUR T1 - Mineralogical analysis of drilled mudstone at Yellowknife Bay, Gale Crater, Mars AN - 1718053776; 2015-095325 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Blake, David F AU - Vaniman, D AU - Bristow, T AU - Bish, D L AU - Rampe, E AU - Morris, R AU - Treiman, A H AU - Ming, D AU - Chipera, S AU - Morrison, S AU - Downs, R T AU - Farmer, J D AU - Crisp, J AU - Achilles, C N AU - Morookian, J M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 213 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - Yellowknife Bay KW - mudstone KW - in situ KW - X-ray diffraction data KW - Yellowknife Bay Formation KW - Mars KW - Sheepbed Mudstone KW - Gale Crater KW - terrestrial planets KW - planets KW - sedimentary rocks KW - mineral composition KW - alluvial fans KW - lacustrine environment KW - X-ray fluorescence spectra KW - CheMin KW - spectra KW - saponitization KW - clastic rocks KW - chemosynthesis KW - pH KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718053776?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mineralogical+analysis+of+drilled+mudstone+at+Yellowknife+Bay%2C+Gale+Crater%2C+Mars&rft.au=Blake%2C+David+F%3BVaniman%2C+D%3BBristow%2C+T%3BBish%2C+D+L%3BRampe%2C+E%3BMorris%2C+R%3BTreiman%2C+A+H%3BMing%2C+D%3BChipera%2C+S%3BMorrison%2C+S%3BDowns%2C+R+T%3BFarmer%2C+J+D%3BCrisp%2C+J%3BAchilles%2C+C+N%3BMorookian%2C+J+M%3BAnonymous&rft.aulast=Blake&rft.aufirst=David&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=213&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 - 2015-10-01 N1 - SubjectsTermNotLitGenreText - alluvial fans; CheMin; chemosynthesis; clastic rocks; Gale Crater; in situ; instruments; lacustrine environment; Mars; mineral composition; mudstone; pH; planets; saponitization; sedimentary rocks; Sheepbed Mudstone; spectra; terrestrial planets; X-ray diffraction data; X-ray fluorescence spectra; Yellowknife Bay; Yellowknife Bay Formation ER - TY - JOUR T1 - Understanding of crop phenology using satellite-based retrievals and climate factors - a case study on spring maize in Northeast China plain AN - 1717501394; PQ0002001263 AB - Land surface phenology is an efficient bio-indicator for monitoring terrestrial ecosystem variation in response to climate change. Numerous studies point out climate change plays an important role in modulating vegetation phenological events, especially in agriculture. In turn, surface changes caused by geo-biological processes can affect climate transition regionally and perhaps globally, as concluded by Intergovernmental Panel on Climate Change (IPCC) in 2001. Large amounts of research concluded that crops, as one of the most sensitive bio-indicators for climate change, can be strongly influenced by local weather such as temperature, moisture and radiation. Thus, investigating the details of weather impact and the feedback from crops can help improve our understanding of the interaction between crops and climate change at satellite scale. Our efforts start from this point, via case studies over the famous agriculture region in the Northeast China's plain to examine the response of spring maize under temperature and moisture stress. MODIS-based daily green vegetation information together with frequent field specification of the surface phenology as well as continuous measurements of the routine climatic factors during seven years (2003-2009) is used in this paper. Despite the obvious difference in scale between satellite estimations and field observations, the inter- and intra-annual variation of maize in seven-years' growth was captured successfully over three typical spring maize regions (Fuyu, Changling, and Hailun) in Northeast China. The results demonstrate that weather conditions such as changes of temperature and moisture stress provide considerable contribution to the year-to-year variations in the timing of spring maize phenological events. JF - IOP Conference Series: Earth and Environmental Science AU - Shuai, Yanmin AU - Xie, Donghui AU - Wang, Peijuan AU - Wu, Menxin AD - ERT Inc. at Biospheric Sciences laboratory (Code 618) NASA Goddard Space Flight Center, Greenbelt, MD 20771, Yanmin.Shuai@ertcorp.com Y1 - 2014///0, PY - 2014 DA - 0, 2014 SP - 1 EP - 6 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 17 SN - 1755-1307, 1755-1307 KW - Sustainability Science Abstracts; Aqualine Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts KW - Agriculture KW - Climate change KW - Remote sensing KW - Crops KW - Growth KW - Case studies KW - Phenology KW - Radiation KW - Zea mays KW - Corn KW - Environmental effects KW - Bioindicators KW - Temperature effects KW - Weather KW - Conferences KW - Case Studies KW - Moisture Stress KW - Climate KW - Temperature KW - Vegetation KW - Stress KW - Satellites KW - Ecosystem disturbance KW - China, People's Rep. KW - AQ 00001:Water Resources and Supplies KW - M3 1010:Issues in Sustainable Development KW - SW 0810:General KW - Q5 08502:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1717501394?accountid=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=IOP+Conference+Series%3A+Earth+and+Environmental+Science&rft.atitle=Understanding+of+crop+phenology+using+satellite-based+retrievals+and+climate+factors+-+a+case+study+on+spring+maize+in+Northeast+China+plain&rft.au=Shuai%2C+Yanmin%3BXie%2C+Donghui%3BWang%2C+Peijuan%3BWu%2C+Menxin&rft.aulast=Shuai&rft.aufirst=Yanmin&rft.date=2014-01-01&rft.volume=17&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=IOP+Conference+Series%3A+Earth+and+Environmental+Science&rft.issn=17551307&rft_id=info:doi/10.1088%2F1755-1315%2F17%2F1%2F012037 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Temperature effects; Growth; Radiation; Phenology; Climate change; Environmental effects; Ecosystem disturbance; Bioindicators; Agriculture; Weather; Conferences; Climate; Temperature; Remote sensing; Stress; Vegetation; Satellites; Crops; Case studies; Moisture Stress; Case Studies; Corn; Zea mays; China, People's Rep. DO - http://dx.doi.org/10.1088/1755-1315/17/1/012037 ER - TY - JOUR T1 - MAXIMIZING THE ExoEarth CANDIDATE YIELD FROM A FUTURE DIRECT IMAGING MISSION AN - 1717495257; PQ0002002231 AB - ExoEarth yield is a critical science metric for future exoplanet imaging missions. Here we estimate exoEarth candidate yield using single visit completeness for a variety of mission design and astrophysical parameters. We review the methods used in previous yield calculations and show that the method choice can significantly impact yield estimates as well as how the yield responds to mission parameters. We introduce a method, called Altruistic Yield Optimization, that optimizes the target list and exposure times to maximize mission yield, adapts maximally to changes in mission parameters, and increases exoEarth candidate yield by up to 100% compared to previous methods. We use Altruistic Yield Optimization to estimate exoEarth candidate yield for a large suite of mission and astrophysical parameters using single visit completeness. We find that exoEarth candidate yield is most sensitive to telescope diameter, followed by coronagraph inner working angle, followed by coronagraph contrast, and finally coronagraph contrast noise floor. We find a surprisingly weak dependence of exoEarth candidate yield on exozodi level. Additionally, we provide a quantitative approach to defining a yield goal for future exoEarth-imaging missions. JF - Astrophysical Journal AU - Stark, Christopher C AU - Roberge, Aki AU - Mandell, Avi AU - Robinson, Tyler D AD - NASA Goddard Space Flight Center, Exoplanets & Stellar Astrophysics Laboratory, Code 667, Greenbelt, MD 20771, USA, christopher.c.stark@nasa.gov PY - 2014 SP - 1 EP - 20 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 795 IS - 2 SN - 0004-637X, 0004-637X KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - methods: numerical KW - planetary systems KW - telescopes KW - Telescopes KW - Coronal observations KW - Reviews KW - Acoustic waves KW - Noise pollution KW - P 7000:NOISE KW - M2 523.947:Solar Corona (523.947) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1717495257?accountid=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=MAXIMIZING+THE+ExoEarth+CANDIDATE+YIELD+FROM+A+FUTURE+DIRECT+IMAGING+MISSION&rft.au=Stark%2C+Christopher+C%3BRoberge%2C+Aki%3BMandell%2C+Avi%3BRobinson%2C+Tyler+D&rft.aulast=Stark&rft.aufirst=Christopher&rft.date=2014-01-01&rft.volume=795&rft.issue=2&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F795%2F2%2F122 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Telescopes; Coronal observations; Acoustic waves; Noise pollution; Reviews DO - http://dx.doi.org/10.1088/0004-637X/795/2/122 ER - TY - JOUR T1 - Mass dependency of isotope fractionation of gases under thermal gradient AN - 1707524984; 2015-080820 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Sun, Tao AU - Niles, Paul AU - Bao, Huiming AU - Socki, Richard AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2415 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - processes KW - isotope fractionation KW - experimental studies KW - diffusion KW - oxygen KW - thermal properties KW - convection KW - nitrogen KW - carbon dioxide KW - carbon monoxide KW - heat flow KW - geothermal gradient KW - kinetics KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707524984?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mass+dependency+of+isotope+fractionation+of+gases+under+thermal+gradient&rft.au=Sun%2C+Tao%3BNiles%2C+Paul%3BBao%2C+Huiming%3BSocki%2C+Richard%3BAnonymous&rft.aulast=Sun&rft.aufirst=Tao&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2415&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 - 2015-08-27 N1 - SubjectsTermNotLitGenreText - carbon dioxide; carbon monoxide; convection; diffusion; experimental studies; geothermal gradient; heat flow; isotope fractionation; kinetics; nitrogen; oxygen; processes; thermal properties ER - TY - JOUR T1 - Variability in the biological potential of serpentinizing systems AN - 1707521690; 2015-083333 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Hoehler, Tori M AU - Sanjoy, Som AU - McCollom, Tom AU - Cardace, Dawn AU - Schrenk, Matt AU - Alperin, Marc AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1011 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - alteration KW - serpentinization KW - communities KW - isotopes KW - metasomatism KW - stable isotopes KW - variations KW - temperature KW - models KW - mineral composition KW - chemical reactions KW - hydrogen KW - carbon KW - deuterium KW - pH KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707521690?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Variability+in+the+biological+potential+of+serpentinizing+systems&rft.au=Hoehler%2C+Tori+M%3BSanjoy%2C+Som%3BMcCollom%2C+Tom%3BCardace%2C+Dawn%3BSchrenk%2C+Matt%3BAlperin%2C+Marc%3BAnonymous&rft.aulast=Hoehler&rft.aufirst=Tori&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1011&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 - 2015-08-27 N1 - SubjectsTermNotLitGenreText - alteration; carbon; chemical reactions; communities; deuterium; hydrogen; isotopes; metasomatism; mineral composition; models; pH; serpentinization; stable isotopes; temperature; variations ER - TY - JOUR T1 - Biomass-burning aerosol emissions from measurement to modeling AN - 1707520914; 2015-083405 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Ichoku, Charles AU - Ellison, Luke AU - Wang, Jun AU - Yue, Yun AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1083 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - biomass KW - ecosystems KW - combustion KW - simulation KW - environmental effects KW - measurement KW - cerium KW - models KW - fires KW - transport KW - metals KW - carbon KW - aerosols KW - seasonal variations KW - rare earths KW - particulate materials KW - accuracy KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707520914?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Biomass-burning+aerosol+emissions+from+measurement+to+modeling&rft.au=Ichoku%2C+Charles%3BEllison%2C+Luke%3BWang%2C+Jun%3BYue%2C+Yun%3BAnonymous&rft.aulast=Ichoku&rft.aufirst=Charles&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1083&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 - 2015-08-27 N1 - SubjectsTermNotLitGenreText - accuracy; aerosols; biomass; carbon; cerium; combustion; ecosystems; environmental effects; fires; measurement; metals; models; particulate materials; rare earths; seasonal variations; simulation; transport ER - TY - JOUR T1 - Impact of core-shell optical properties on photolysis and chemistry AN - 1703689920; 2015-078418 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - MacIntyre, H L AU - Bian, H AU - Steenrod, S D AU - Alvarado, M J AU - Wang, C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1560 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - sulfate ion KW - pollutants KW - photochemistry KW - pollution KW - rates KW - troposphere KW - variations KW - carbon dioxide KW - air pollution KW - models KW - controls KW - ozone KW - organic compounds KW - chemical reactions KW - photolysis KW - aerosols KW - geochemistry KW - particles KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703689920?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Impact+of+core-shell+optical+properties+on+photolysis+and+chemistry&rft.au=MacIntyre%2C+H+L%3BBian%2C+H%3BSteenrod%2C+S+D%3BAlvarado%2C+M+J%3BWang%2C+C%3BAnonymous&rft.aulast=MacIntyre&rft.aufirst=H&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1560&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 - 4 N1 - Last updated - 2015-08-13 N1 - SubjectsTermNotLitGenreText - aerosols; air pollution; carbon dioxide; chemical reactions; controls; geochemistry; models; organic compounds; ozone; particles; photochemistry; photolysis; pollutants; pollution; rates; sulfate ion; troposphere; variations ER - TY - JOUR T1 - Mineralogical constraints on diagenesis of the Sheepbed Mudstone, Gale Crater, Mars, as determined by the CheMin XRD instrument and examples of the use of NASA spinoff technology in the oil and gas industry AN - 1703687279; 2015-077932 AB - Sediments of the Yellowknife Bay formation (Gale crater, Mars) include the Sheepbed member, a mudstone cut by light-toned veins. Two drill samples, John Klein and Cumberland, were collected and analyzed by the CheMin XRD/XRF instrument during Curiosity's Yellowknife Bay campaign. The CheMin XRD analysis shows that the mudstone contains basaltic minerals (Fe-forsterite, augite, pigeonite, plagioclase), as well as Fe-oxide/hydroxides, Fe-sulfides, nearly equal 20% trioctahedral phyllosilicates and nearly equal 20-30% amorphous materials. The light-toned veins that intersect the drill hole contain Ca-sulfates; anhydrite and bassanite are detected by XRD but gypsum is also indicated from Mastcam spectral mapping. These sulfates appear to be almost entirely restricted to late-diagenetic veins. The presence of phyllosilicates indicates that the activity of water was high during their formation and/or transport & deposition (should they have been detrital). Lack of chlorite places limits on the maximum temperature of alteration (likely <100 C). The presence of Ca-sulfates rather than Mg- or Fe-sulfates suggests that the pore water pH was near-neutral and of relatively low ionic strength. The presence of a surplus of magnetite ( nearly equal 7-9%) and the near absence of olivine ( nearly equal 0-3%) when compared to previous CheMin soil measurements and Mars normative basalts suggests that saponitization of olivine (a process analogous to serpentinization) could have occurred. All of these early diagenetic features appear to have been preserved in this more than 3 billion year old rock with minimal alteration since their formation, as indicated by the ease of drilling (weak lithification, lack of cementing phases), the presence of amorphous material, and the late-stage fracturing with emplacement of calcium sulfate veins. The CheMin XRD/XRF now operating robotically on Mars is the product of a 22-year NASA technology development effort. CheMin is 30X30X30 cm, weighs 10 kg, has only one moving part (the wheel which holds the transmission-geometry sample cells) and operates on 50 watts. Commercial spinoff instruments have been developed using CheMin technology that are now widely used in the oil & gas industries. One example is the Terra XRD/XRF, a battery powered field portable unit that can assist in real-time mudlogging to provide full mineralogical information useful in the geosteering of horizontal wells. Terra is currently being deployed at the well site by some of the major service companies. JF - Abstracts: Annual Meeting - American Association of Petroleum Geologists AU - Blake, David AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 PB - American Association of Petroleum Geologists and Society for Sedimentary Geology, Tulsa, OK VL - 2014 KW - silicates KW - X-ray diffraction data KW - petroleum KW - Mars KW - Sheepbed Member KW - Gale Crater KW - sedimentary rocks KW - mineral composition KW - X-ray fluorescence spectra KW - spectra KW - basaltic composition KW - real-time methods KW - chemical analysis KW - mudstone KW - sulfates KW - Yellowknife Bay Formation KW - veins KW - terrestrial planets KW - planets KW - boreholes KW - diagenesis KW - sheet silicates KW - clastic rocks KW - pore water KW - instruments KW - 29A:Economic geology, geology of energy sources KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703687279?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mineralogical+constraints+on+diagenesis+of+the+Sheepbed+Mudstone%2C+Gale+Crater%2C+Mars%2C+as+determined+by+the+CheMin+XRD+instrument+and+examples+of+the+use+of+NASA+spinoff+technology+in+the+oil+and+gas+industry&rft.au=Blake%2C+David%3BAnonymous&rft.aulast=Blake&rft.aufirst=David&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/1832966.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 8, 2014 N1 - Last updated - 2015-08-13 N1 - CODEN - #06983 N1 - SubjectsTermNotLitGenreText - basaltic composition; boreholes; chemical analysis; clastic rocks; diagenesis; Gale Crater; instruments; Mars; mineral composition; mudstone; petroleum; planets; pore water; real-time methods; sedimentary rocks; Sheepbed Member; sheet silicates; silicates; spectra; sulfates; terrestrial planets; veins; X-ray diffraction data; X-ray fluorescence spectra; Yellowknife Bay Formation ER - TY - JOUR T1 - The isotopic composition of Martian atmospheric CO (sub 2) ; measurements with the Sample Analysis at Mars (SAM) quadrupole mass spectrometer AN - 1703686778; 2015-077770 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Franz, Heather B AU - Mahaffy, P R AU - Wong, M H AU - Stern, J C AU - Atreya, S K AU - Conrad, P G AU - Flesch, G J AU - Leshin, L A AU - Manning, H L K AU - McKay, C P AU - Owen, T C AU - Trainer, M G AU - Webster, C R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2194 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - oxygen KW - isotopes KW - isotope ratios KW - C-13/C-12 KW - data processing KW - mass spectra KW - atmosphere KW - Mars KW - O-18/O-16 KW - stable isotopes KW - Gale Crater KW - carbon dioxide KW - terrestrial planets KW - planets KW - Sample Analysis at Mars KW - carbon KW - composition KW - spectra KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703686778?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+isotopic+composition+of+Martian+atmospheric+CO+%28sub+2%29+%3B+measurements+with+the+Sample+Analysis+at+Mars+%28SAM%29+quadrupole+mass+spectrometer&rft.au=Franz%2C+Heather+B%3BMahaffy%2C+P+R%3BWong%2C+M+H%3BStern%2C+J+C%3BAtreya%2C+S+K%3BConrad%2C+P+G%3BFlesch%2C+G+J%3BLeshin%2C+L+A%3BManning%2C+H+L+K%3BMcKay%2C+C+P%3BOwen%2C+T+C%3BTrainer%2C+M+G%3BWebster%2C+C+R%3BAnonymous&rft.aulast=Franz&rft.aufirst=Heather&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/2194.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 - 13 N1 - PubXState - TX N1 - SuppNotes - Accessed on Mar. 18, 2015 N1 - Last updated - 2015-08-13 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - atmosphere; C-13/C-12; carbon; carbon dioxide; composition; data processing; Gale Crater; isotope ratios; isotopes; Mars; mass spectra; O-18/O-16; oxygen; planets; Sample Analysis at Mars; spectra; stable isotopes; terrestrial planets ER - TY - JOUR T1 - Investigating lunar crustal melting; implications for genesis of silicic volcanism on the Moon AN - 1696875453; 2015-068826 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Gullikson, A L AU - Hagerty, Justin J AU - Reid, M R AU - Rapp, J F AU - Draper, D S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 883 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - experimental studies KW - protoliths KW - pressure KW - Moon KW - igneous rocks KW - granites KW - data processing KW - siliceous composition KW - models KW - computer programs KW - plutonic rocks KW - MELTS model KW - melting KW - immiscibility KW - volcanism KW - mixing KW - lunar crust KW - thermodynamic properties KW - monzodiorite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875453?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Investigating+lunar+crustal+melting%3B+implications+for+genesis+of+silicic+volcanism+on+the+Moon&rft.au=Gullikson%2C+A+L%3BHagerty%2C+Justin+J%3BReid%2C+M+R%3BRapp%2C+J+F%3BDraper%2C+D+S%3BAnonymous&rft.aulast=Gullikson&rft.aufirst=A&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=883&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 - 2015-11-19 N1 - SubjectsTermNotLitGenreText - computer programs; data processing; experimental studies; granites; igneous rocks; immiscibility; lunar crust; melting; MELTS model; mixing; models; monzodiorite; Moon; plutonic rocks; pressure; protoliths; siliceous composition; thermodynamic properties; volcanism ER - TY - JOUR T1 - Worldwide meteorite fall recovery using weather radars AN - 1696875409; 2015-068684 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Fries, Marc AU - Matson, Robert AU - Schaefer, Jacob AU - Fries, Jeffrey AU - Hankey, Michael AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 740 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - meteorites KW - seismometry KW - radar methods KW - recovery KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696875409?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Worldwide+meteorite+fall+recovery+using+weather+radars&rft.au=Fries%2C+Marc%3BMatson%2C+Robert%3BSchaefer%2C+Jacob%3BFries%2C+Jeffrey%3BHankey%2C+Michael%3BAnonymous&rft.aulast=Fries&rft.aufirst=Marc&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=740&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 - 2015-07-17 N1 - SubjectsTermNotLitGenreText - meteorites; radar methods; recovery; seismometry ER - TY - JOUR T1 - Isotopic compositions of asteroidal liquid water trapped in fluid inclusions of chondrites AN - 1696874127; 2015-067338 AB - Determination of isotopic composition of extraterrestrial liquid water provides important information regarding the origin of water on Earth and the terrestrial planets. Fluid inclusions in halite of ordinary chondrites are the only direct samples of extraterrestrial liquid water available for laboratory measurements. We determined H and O isotopic compositions of this water by secondary ion mass spectrometry equipped with a cryogenic apparatus for sample cooling. Isotopic compositions of the fluid inclusion fluids (brines) were highly variable among individual inclusions, -400 3%, in line with element abundance results. The mineral composition of core DJ42 is complex including high alteration product abundance within the upper 10 cm. High abundances of gypsum are found in almost all samples. Other cores show fewer alteration products and less or no gypsum. DJ42 also shows comparatively high thorium (12 ppm) and associated REE element abundances at a depth of 4-7 cm. The variability of analytical results across the relatively small and confined area of Don Juan Basin suggests that both surface and groundwater alteration and movement of sediment constituents have operated long term, strongly influenced by local geochemical conditions. JF - Abstracts with Programs - Geological Society of America AU - Englert, P AU - Bishop, Janice L AU - Patel, S AU - Gibson, Everett K AU - Koeberl, Christian AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 428 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 06A:Sedimentary petrology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686058459?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Don+Juan+Basin+sediments%3B+surface+and+subsurface+chemistry+and+mineralogy&rft.au=Englert%2C+P%3BBishop%2C+Janice+L%3BPatel%2C+S%3BGibson%2C+Everett+K%3BKoeberl%2C+Christian%3BAnonymous&rft.aulast=Englert&rft.aufirst=P&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=428&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 - Number of references - 5 N1 - PubXState - CO N1 - Last updated - 2015-06-05 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Mineralogical evidence for water-rock interactions in Gale Crater, Mars; CheMin's perspective AN - 1686057483; 2015-051382 AB - The Mars Science Laboratory (MSL) Rover, Curiosity, has delivered powders of three fine-grained sedimentary rocks to the CheMin XRD instrument. All contain minerals indicative of water-rock reactions, in addition to high-T basalt minerals and a significant proportion of X-ray amorphous material. The first two samples, Cumberland and John_Klein from the Sheepbed mudstone stratum, contain approximately 20% (weight) of phyllosilicate minerals, recognized by broad 001 diffraction peaks at approximately 1.3 nm and approximately 1.0 nm respectively and 02L diffraction bands. These peaks are most consistent with smectite clay minerals with different interlayer cations: Mg for Cumberland, and Na or K for John_Klein. The 02L band locations imply that they are trioctahedral. Detections of phyllosilicates in the central mound of Gale crater from VNIR orbtial reflectance spectra are inferred to represent the dioctahedral smectite nontronite; however, the reflectance spectrum of a terrestrial trioctahedral smectite is similar to that of nontronite, so the clay mineral(s) of the mound may include trioctahedral smectite. The smectites in Cumberland and John_Klein are likely to be diagenetic because: (1) the samples are from the same stratum, only a few decimeters apart, implying that their difference reflect local processes; and (2) the mineral proportions of both rocks are similar to that of local windblown sand, except for containing: the smectite, more magnetite, and much less olivine. This relationship suggests that the mudstone, as deposited, was like the windblown sand, and that much of its original olivine reacted with water to form smectite + magnetite. Parallel with this reaction, dissolution of olivine can release Fe (super 2+) ions, which (with a CO (sub 2) atmosphere) could provide energy for chemolithoautotrophic microbial life. The third rock sample, Windjana, is a basaltic sandstone rich in K-feldspar. It contains small proportions of phyllosilicates, seen as a broad diffraction rise at approximately 1.3 nm, and a low sharper peak at approximately 1.0 nm. The rise is comparable to the diffraction pattern of Cumberland and can be interpreted as smectite; little more can be discerned because its 02L band is obscured by peaks from other minerals. The latter peak is consistent with illite or mica, which could form by alteration of K-feldspar. Thanks to the whole CheMin and MSL teams! JF - Abstracts with Programs - Geological Society of America AU - Treiman, A H AU - Rampe, E B AU - Bristow, Thomas F AU - Morris, Richard V AU - Vaniman, David AU - Bish, David L AU - Ming, Douglas W AU - Blake, David F AU - Achilles, Cherie N AU - Morrison, Shaunna M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 427 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686057483?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Mineralogical+evidence+for+water-rock+interactions+in+Gale+Crater%2C+Mars%3B+CheMin%27s+perspective&rft.au=Treiman%2C+A+H%3BRampe%2C+E+B%3BBristow%2C+Thomas+F%3BMorris%2C+Richard+V%3BVaniman%2C+David%3BBish%2C+David+L%3BMing%2C+Douglas+W%3BBlake%2C+David+F%3BAchilles%2C+Cherie+N%3BMorrison%2C+Shaunna+M%3BAnonymous&rft.aulast=Treiman&rft.aufirst=A&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=427&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 - 2015-06-05 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Reconstruction of limnology and microbialite formation conditions from carbonate clumped isotope paleothermometry; a test case from Pavilion and Kelly lakes AN - 1680755936; 2015-043912 AB - Quantitative tools for deciphering the environment of microbialite formation are relatively limited. For example, the carbonate-water geothermometer requires assumptions about the isotopic composition of the water of formation. This study explores the utility of using "clumped" isotope thermometry to study microbialite formation conditions. We measured freshwater microbialites from Pavilion and Kelly Lake (British Columbia) in order to determine the temperature of precipitation and the (super 18) O/ (super 16) O ratio of the waters of formation. Microbialites span the thermocline in both lakes, ranging from depths of 10-55 m in Pavilion Lake, and 10-25 m in Kelly Lake. Isotopic ratios were determined for each sample, and used to reconstruct limnology. Results were then compared to current limnological data from the lake in order to reconstruct the history of microbialite formation. Microbialites collected at shallow depths ( approximately 10 m) in Pavilion Lake and Kelly Lake yield clumped isotope-based temperature of formation of 20.8 + or -2.8 degrees C and 15.9 + or -2.5 degrees C (1 s.e.) respectively. Similar temperatures are also found for microbialites collected from deeper parts of both lakes. The data for the shallower depths match the current measured temperature profiles, however the clumped isotope-based temperature estimates from the deeper microbialites do not match the present limnological characteristics. The deepest microbialites ( approximately 50 m) yield radioisotope ages indicating they primarily formed earlier in the Holocene, when pollen data and our reconstructed water (super 18) O/ (super 16) O ratios indicate a period of aridity, with lower lake levels. Given the deepest microbialites are receiving <1% of photosynthetically active radiation (PAR), it is likely that the deepest microbialites primarily formed when lower lake levels resulting in these microbialites being located higher in the photic zone. JF - Abstracts with Programs - Geological Society of America AU - Petryshyn, Victoria A AU - Lim, Darlene S S AU - Laval, Bernard AU - Brady, Allyson L AU - Slater, Gregory F AU - Tripati, Aradhna AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 683 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680755936?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Reconstruction+of+limnology+and+microbialite+formation+conditions+from+carbonate+clumped+isotope+paleothermometry%3B+a+test+case+from+Pavilion+and+Kelly+lakes&rft.au=Petryshyn%2C+Victoria+A%3BLim%2C+Darlene+S+S%3BLaval%2C+Bernard%3BBrady%2C+Allyson+L%3BSlater%2C+Gregory+F%3BTripati%2C+Aradhna%3BAnonymous&rft.aulast=Petryshyn&rft.aufirst=Victoria&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=683&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 - Volcano-ice interactions in the Askja region, central Iceland; high-resolution remote sensing analyses AN - 1676586964; 2015-039079 AB - The Askja volcanic system is located at 16.75 W, 65.02N, in the central highlands of Iceland, and rests upon a NE-SW-trending fissure swarm forming the boundary of the Atlantic and European plates. Fissure-fed and point-source volcanism have occurred throughout glacial and interglacial periods, resulting in some of the best examples of subglacial volcanic landforms such as Herdubreid, a well-developed tuya and the "tail of Herdubreid" a classic moberg ridge. Smaller scale moberg ridges and tindars are found in the region as well. In recent years, high-resolution remote sensing data have become available, enabling new insights into the geology of the region from remote geomorphic and compositional mapping. We are using remote sensing data from: 1) IKONOS, which provides monochromatic data at 1 m/pixel spatial resolution (4 m/pixel color), 2) Hyperion, which provides hyperspectral (220 spectral bands) near infrared data at 30 m/pixel spatial resolution, 3) ASTER, which provide multispectral data at 15-90 m/pixel, and 4) the Shuttle Radar Topography Mission (SRTM) data, which provide topographic data. We are using the data to map the geology of the greater Askja region at meter-scale in order to better understand the complicated interplay of sedimentary and volcanic processes associated with volcano-ice interactions, and to evaluate how the mineralogy of subglacial volcanic structures can be used to reconstruct an ancient hydrothermal environment. In fact, similar landforms have been identified on Mars, therefore remote sensing studies of classical features on Earth might help to evaluate evidence for volcano-ice interactions on other planets. JF - Abstracts with Programs - Geological Society of America AU - Michalski, Joseph AU - Bleacher, Jacob E AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 575 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/1676586964?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Volcano-ice+interactions+in+the+Askja+region%2C+central+Iceland%3B+high-resolution+remote+sensing+analyses&rft.au=Michalski%2C+Joseph%3BBleacher%2C+Jacob+E%3BAnonymous&rft.aulast=Michalski&rft.aufirst=Joseph&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=575&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 - 2015-04-30 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Source- to- sink of crater fill deposits in arid hydroclimatic conditions (Ubehebe Volcanic Field, Death Valley, CA) AN - 1676586827; 2015-037402 AB - We present here novel results from a set of multi-component investigations to characterize intra-crater clay-rich sediments in relation to surface hydroclimatic conditions (2009-current) at Ubehebe Volcanic Field (UVF) in Death Valley National Park. The UVF ( approximately 15 Km (super 2) ) includes a dozen craters formed during hydro magmatic explosions occurred sometime between 1 thousand (Ka) and 6 Ka years ago. A conceptual model of sources-to sinks for Ubehebe Crater (UC), the larger and deeper within UVF, involves 1) pre-eruption (fluvio-lacustrine sandstone, siltstone and mudstone); 2) sin-eruption (base surge, vitric tuff); and 3) and post-eruption (smectite-rich mud) materials. Detrital minerals (quartz, carbonates, plagioclase, K-feldspar) in the Miocene wall deposits are over-represented relative to the modern floor deposits (mud: approximately 99 wt.%, N=5), the latter containing proportionally more smectites (montmorillonite) than detrital components (volcanic glass, feldspar, and quartz). To date, deposition of intracrater deposits involves: a) approximately 50 mm to >250 mm/y rainfall in water years (WY) 2004-current with Summer rainfalls accounting for up to approximately 30% and approximately 50% of the total annual precipitation (WY 2011, 2012, and 2013). These values are representative of the climatic context as they encompass the wettest (2005, 2011) and driest years (2002, 2007, 2012, 2013 record driest) of the last approximately 120 years (Western Regional Climate Center, www.wrcc.dri.edu). b) Sediment deposition approximately 1-5 mm/y to approximately 40 cm/y. c) Surface ground moisture ranging from dry-very dry (1-3% to <10% Wt. water content) to wet-saturated (10-60% Wt.). Ephemeral ponds appear to form once a year and can last for one-two weeks (2009-2011 study years). Results from this cross-disciplinary and multi-component investigation are relevant to understanding sedimentary processes in extreme arid environments and in the broad areas of climate change and water resources monitoring. JF - Abstracts with Programs - Geological Society of America AU - Bonaccorsi, Rosalba AU - Baker, Leslie L AU - Zent, Aaron P AU - Valdre, Giovanni AU - Willson, David AU - Friese, Richard AU - McKay, Chris AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 437 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676586827?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Source-+to-+sink+of+crater+fill+deposits+in+arid+hydroclimatic+conditions+%28Ubehebe+Volcanic+Field%2C+Death+Valley%2C+CA%29&rft.au=Bonaccorsi%2C+Rosalba%3BBaker%2C+Leslie+L%3BZent%2C+Aaron+P%3BValdre%2C+Giovanni%3BWillson%2C+David%3BFriese%2C+Richard%3BMcKay%2C+Chris%3BAnonymous&rft.aulast=Bonaccorsi&rft.aufirst=Rosalba&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=437&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 - 2015-04-30 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - H diffusion in olivine and pyroxene from peridotite xenoliths and a Hawaiian magma speedometer AN - 1676585953; 2015-038739 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Peslier, Anne H AU - Bizimis, M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1942 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - silicates KW - upwelling KW - volcanic rocks KW - igneous rocks KW - mantle KW - olivine group KW - solution KW - metasomatism KW - infrared spectra KW - FTIR spectra KW - pyroxene group KW - plutonic rocks KW - melting KW - volcanism KW - olivine KW - inclusions KW - orthosilicates KW - spectra KW - xenoliths KW - chain silicates KW - diffusion KW - Honolulu County Hawaii KW - Oahu KW - Hawaii KW - East Pacific Ocean Islands KW - ultramafics KW - nesosilicates KW - models KW - mineral inclusions KW - magmas KW - hydrogen KW - peridotites KW - Oceania KW - decompression KW - Polynesia KW - nephelinite KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676585953?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=H+diffusion+in+olivine+and+pyroxene+from+peridotite+xenoliths+and+a+Hawaiian+magma+speedometer&rft.au=Peslier%2C+Anne+H%3BBizimis%2C+M%3BAnonymous&rft.aulast=Peslier&rft.aufirst=Anne&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1942&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 - 6 N1 - Last updated - 2015-04-30 N1 - SubjectsTermNotLitGenreText - chain silicates; decompression; diffusion; East Pacific Ocean Islands; FTIR spectra; Hawaii; Honolulu County Hawaii; hydrogen; igneous rocks; inclusions; infrared spectra; magmas; mantle; melting; metasomatism; mineral inclusions; models; nephelinite; nesosilicates; Oahu; Oceania; olivine; olivine group; orthosilicates; peridotites; plutonic rocks; Polynesia; pyroxene group; silicates; solution; spectra; ultramafics; United States; upwelling; volcanic rocks; volcanism; xenoliths ER - TY - JOUR T1 - Lipid biomarkers in acidic ecosystems; relevance to early Earth AN - 1676585632; 2015-038700 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Parenteau, M N AU - Jahnke, L L AU - Bristow, T AU - Carlson, M AU - Harris, R AU - Farmer, J D AU - Des Marais, D J AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1903 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - terrestrial environment KW - communities KW - upper Precambrian KW - lipids KW - isotopes KW - Paleoproterozoic KW - Lassen Volcanic National Park KW - ecosystems KW - stable isotopes KW - paleoecology KW - California KW - carbon KW - Yellowstone National Park KW - acidic composition KW - Archean KW - pH KW - methylbacteriohopanepolyols KW - Precambrian KW - isotope ratios KW - C-13/C-12 KW - Proterozoic KW - biomarkers KW - habitat KW - organic compounds KW - marine environment KW - acidophiles KW - 12:Stratigraphy KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676585632?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Lipid+biomarkers+in+acidic+ecosystems%3B+relevance+to+early+Earth&rft.au=Parenteau%2C+M+N%3BJahnke%2C+L+L%3BBristow%2C+T%3BCarlson%2C+M%3BHarris%2C+R%3BFarmer%2C+J+D%3BDes+Marais%2C+D+J%3BAnonymous&rft.aulast=Parenteau&rft.aufirst=M&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1903&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 - acidic composition; acidophiles; Archean; biomarkers; C-13/C-12; California; carbon; communities; ecosystems; habitat; isotope ratios; isotopes; Lassen Volcanic National Park; lipids; marine environment; methylbacteriohopanepolyols; organic compounds; paleoecology; Paleoproterozoic; pH; Precambrian; Proterozoic; stable isotopes; terrestrial environment; United States; upper Precambrian; Yellowstone National Park ER - TY - JOUR T1 - Studying the response to deglaciation through the prokaryotic diversity and metabolisms in the sediments of oligotrophic Andean lakes AN - 1676585379; 2015-038702 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Parro, Victor AU - Blanco, Yolanda AU - Rivas, Luis A AU - Puente-Sanchez, Fernando AU - Echeverria, Alex AU - Demergasso, Cecilia AU - Cabrol, Nathalie AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1905 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - communities KW - prokaryotes KW - Chile KW - deglaciation KW - climate change KW - electromagnetic radiation KW - sediments KW - Lo Encanado Lake KW - species diversity KW - Laguna Negra KW - processes KW - Andes KW - monitoring KW - metabolism KW - biochemistry KW - sedimentation KW - Santiago Chile KW - biomarkers KW - assays KW - ultraviolet radiation KW - geochemical cycle KW - models KW - South America KW - oligotrophic environment KW - lacustrine environment KW - lake sediments KW - 09:Paleobotany UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676585379?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Studying+the+response+to+deglaciation+through+the+prokaryotic+diversity+and+metabolisms+in+the+sediments+of+oligotrophic+Andean+lakes&rft.au=Parro%2C+Victor%3BBlanco%2C+Yolanda%3BRivas%2C+Luis+A%3BPuente-Sanchez%2C+Fernando%3BEcheverria%2C+Alex%3BDemergasso%2C+Cecilia%3BCabrol%2C+Nathalie%3BAnonymous&rft.aulast=Parro&rft.aufirst=Victor&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1905&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 - Andes; assays; biochemistry; biomarkers; Chile; climate change; communities; deglaciation; electromagnetic radiation; geochemical cycle; lacustrine environment; Laguna Negra; lake sediments; Lo Encanado Lake; metabolism; models; monitoring; oligotrophic environment; processes; prokaryotes; Santiago Chile; sedimentation; sediments; South America; species diversity; ultraviolet radiation ER - TY - JOUR T1 - Using Earth/Mars comparisons to assess habitability in the field; educator symposium and field trip for K-12 educators AN - 1673367587; 2015-035602 AB - Basic geological concepts are best learned by applying them to solve problems in the field. We have followed this approach during two recent national educator trainings for K-12 STEM teachers in which we modeled ways to use Mars as a platform for teaching basic science, math and engineering principles. The goal of this immersive educational experience was to bring teachers together with 6 practicing scientists (members the NASA Curiosity Rover CheMin science team and other Mars science experts) and 5 STEM education specialists to help them infuse current examples of the Next Generation Science Standards (NGSS) practices and content into their teaching. Each symposium/fieldtrip consisted of approximately 35 teachers from across the U.S. and other countries. The symposium began with a morning session at the Arizona State University Mars Space Flight Facility. Basic geological and astrobiological concepts were presented in the session, with a focus on how these concepts are applied to the geological record to assess the habitability and in the exploration of past geological environments for preserved fossil biosignatures. This was followed by an introduction to NGSS and essential questions to highlight approaches for connecting and implementing the field experience in their classrooms. We then headed to the field for 3.5 days to visit key analog sites for Mars (including sites of evaporite deposition, basaltic volcanism, meteor impact and ancient fluvial-lacustrine deposition). Each fieldtrip stop presented unique opportunities to apply key astrobiological concepts. Fieldtrip stops emphasized using outcrop-scale observations over a range of spatial scales to assess the potential for past habitability and biosignature preservation. During and after the fieldtrip, teachers used social media to maintain a background dialog and to pass along questions and observations to the field trip mentors. High-resolution Gigapan images were also obtained for each field trip stop and made available to teachers online, thus allowing them to create important aspects of the field experience for the classroom. Upon our return to ASU, we headed back to the classroom for more instruction focused on gaining practice with classroom implementation of key geological and astrobiological concepts through NGSS-aligned curriculum. JF - Abstracts with Programs - Geological Society of America AU - Farmer, Jack D AU - Blake, David AU - Klug, Sheri L AU - Boonstra, Don AU - Ming, Douglas W AU - Lavery, David B AU - Lafuente, Barbara AU - Manfredi, Leon AU - Swann, Jessica AU - Downs, Robert AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 633 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673367587?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+Earth%2FMars+comparisons+to+assess+habitability+in+the+field%3B+educator+symposium+and+field+trip+for+K-12+educators&rft.au=Farmer%2C+Jack+D%3BBlake%2C+David%3BKlug%2C+Sheri+L%3BBoonstra%2C+Don%3BMing%2C+Douglas+W%3BLavery%2C+David+B%3BLafuente%2C+Barbara%3BManfredi%2C+Leon%3BSwann%2C+Jessica%3BDowns%2C+Robert%3BAnonymous&rft.aulast=Farmer&rft.aufirst=Jack&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=633&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 - MarsFest events and on site outreach activities in Death Valley National Park; a journey into a crater AN - 1673367432; 2015-035603 AB - We summarize outcomes of public Mars festival events in Death Valley National Park, and give examples of outreach activities in Ubehebe Crater as an analog of Martian Gale Crater mudstones. MarsFest events in 2012, 2013, and 2014 were a collaborative effort between the National Park Service, the SETI Institute, NASA Ames Research Center, NASA Goddard Space Flight Center, and JPL. The E/PO Team of Sample Analysis at Mars (SAM) was a key partner. The MarsFest's goal was to bring together scientists, Park staff, and the public to elevate awareness about the fascinating research being done in Death Valley in support of the NASA's Curiosity Mission to Mars. Events included planetary science talks, scientist- and ranger-led field trips to Martian analog sites (Badwater, Ubehebe Crater, Mars Hill), and an expo with mini-rover demonstrations and booths from various organizations (NASA, Mars Society and Planetary Society). Talks showcased Mars Science Laboratory (MSL) Curiosity Rover planning (in 2012) and its exciting results (in 2013 and 2014). Several Curiosity scientists and engineers from NASA Ames and Goddard were involved. Additional speakers and participants came from the SETI Institute, JPL, the Desert Research Institute, and several universities. Over 40 volunteers, including undergraduate, graduate students, and junior scientists staffed exhibits and interacted with the public. Our research activities in Death Valley plus our close working relationship with the Park are an important component of the Mars program. Informal education activities conducted year round at individual research sites are a fundamental part of communicating to the public what NASA missions are doing and showing the connection to life on Earth. Annual events such as MarsFest enhance the Park's understanding of the NASA research conducted within its borders and foster cooperative efforts. Death Valley MarsFest events can be a model for other parks and public lands with planetary analog sites. JF - Abstracts with Programs - Geological Society of America AU - Bonaccorsi, Rosalba AU - Baldino, Terry AU - Jones, Andrea J P AU - Kyriazis, Stephanie F AU - DeVore, Edna AU - Fuhrmann, Kelly K AU - McKay, Christopher P AU - Willson, David AU - Mahaffy, Paul R AU - Bleacher, Lora V AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 633 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673367432?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=MarsFest+events+and+on+site+outreach+activities+in+Death+Valley+National+Park%3B+a+journey+into+a+crater&rft.au=Bonaccorsi%2C+Rosalba%3BBaldino%2C+Terry%3BJones%2C+Andrea+J+P%3BKyriazis%2C+Stephanie+F%3BDeVore%2C+Edna%3BFuhrmann%2C+Kelly+K%3BMcKay%2C+Christopher+P%3BWillson%2C+David%3BMahaffy%2C+Paul+R%3BBleacher%2C+Lora+V%3BAnonymous&rft.aulast=Bonaccorsi&rft.aufirst=Rosalba&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=633&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 - Curiosity connections with pre-college robotics competitions AN - 1673367426; 2015-035604 AB - The Mars Science Laboratory Curiosity rover has special connections with programs engaging pre-college students with the field of robotics. For example, "For Inspiration and Recognition of Science and Technology" (FIRST) offers a series of progressive challenges, beginning with elementary school students and extending through high school. Their keystone program, FIRST Robotics Competition (FRC) connects high school students with engineering, science and business mentors to design and build robots which play a new and different game every year. FRC exposes students to a full product development cycle, in which technical, teamwork, management, and marketing skills are fostered. NASA recognizes the importance of developing a motivated, skilled technical workforce from the ground up. The Agency has provided significant support to FRC since 1995, in both funding and volunteers. Current support from NASA for FRC was competitively awarded via a cooperative agreement notice. The NASA HQ Program Executive responsible for Curiosity supports FIRST at the Executive Advisory Board level. The NASA Robotics Alliance Program, based at NASA Ames Research Center, administers grants to hundreds of FRC teams in the USA. Across NASA, hundreds of staff members volunteer their time and expertise to inspire students to excel in Science, Technology, Engineering and Mathematics (STEM) and explore career options in technical fields. The Curiosity mission has deep connections with the FRC program, as thousands of students were captivated by the "Seven Minutes of Terror" landing and subsequent surface operations. This connection is especially close because mentors involved with development and operations work directly with FRC students. More significantly, the benefits of NASA's investment in FRC alumni are being realized, as early career staff and college interns are currently working with the Curiosity team. FRC and Curiosity is truly inspiring the next generation of Mars explorers. JF - Abstracts with Programs - Geological Society of America AU - Brinza, David E AU - Steele, Robert D AU - Leon, Mark J AU - Lavery, David B AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 633 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673367426?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Curiosity+connections+with+pre-college+robotics+competitions&rft.au=Brinza%2C+David+E%3BSteele%2C+Robert+D%3BLeon%2C+Mark+J%3BLavery%2C+David+B%3BAnonymous&rft.aulast=Brinza&rft.aufirst=David&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=633&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 - G.K. Gilbert Awardee; how was Ganymede resurfaced? AN - 1673366986; 2015-035612 AB - Ganymede, the Solar System's largest satellite, underwent a profound resurfacing event in the geologic past, transforming 2/3 of its ancient, dark, heavily cratered terrain into much brighter, presumably more ice-rich, smooth and grooved terrains. These latter descriptors are Voyager-era, and in those days Ganymede geology took center stage as the fundamental icy satellite problem to be understood (Voyager images of Europa were far poorer). The Galileo mission changed all that, with its focus on Europa and with a limited amount of new Ganymede imaging contributing to a reassessment of resurfacing mechanisms. Seemingly scrapped were concepts of rifting, infill by water, slush, or warm ice, and further tectonic imbrication. The latter alone was deemed sufficient to turn darkness into light, and indeed, examples of rifted and extended dark terrain exist, although whether they are sufficiently "bright" is unclear. All clear examples of grooved terrain have well defined bounding faults, which may be extensional breakaway margins, although the specific conditions and material parameters that lead to this tectonic expression are unclear (numerical work is ongoing). Particularly enigmatic are the smooth (or "subdued" grooved) terrains. We argue that not only is it difficult to make smooth bright terrain from rough dark terrain by tectonic resurfacing alone, it is simply impossible. We are left with two alternatives: 1) smooth terrains are the product rift infilling after all, with very modest subsequent tectonic extension, or 2) they represent Europa-style crustal separation and band formation. Limited evidence for the first comes from topographic studies, embayment relationships, and the structural associations of smooth terrains and caldera-like features (themselves certainly not the product of tectonic resurfacing) (e.g., at Sippar Sulcus). Limited evidence for the second comes from Arbela Sulcus and other "band-like" features on Ganymede (e.g., at Sippar Sulcus as well), although this structural interpretation has been questioned. Europan bands are topographically subdued, yet lineated, so with age and mass wasting could very easily resemble Ganymede smooth terrains. Nor should we be surprised that Ganymede, in its high heat flow days, could resemble Europa in terms of tectonics or eruptions to its surface. JF - Abstracts with Programs - Geological Society of America AU - McKinnon, William B AU - Schenk, Paul M AU - Moore, Jeffrey M AU - Bland, Michael AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 634 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366986?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=G.K.+Gilbert+Awardee%3B+how+was+Ganymede+resurfaced%3F&rft.au=McKinnon%2C+William+B%3BSchenk%2C+Paul+M%3BMoore%2C+Jeffrey+M%3BBland%2C+Michael%3BAnonymous&rft.aulast=McKinnon&rft.aufirst=William&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=634&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 - Implications of a crustal recycling stress state on Io for magma ascent pathways, large mountains, and thickness of the lithosphere AN - 1673366779; 2015-035616 AB - While Jupiter's moon Io is the most volcanically active body in the solar system, the largest mountains seen on Io are created by tectonic forces rather than volcanic construction. Pervasive compression, brought about by subsidence induced by sustained volcanic resurfacing and aided by thermal stress, creates the mountains, but at the same time inhibits magma ascent in vertical conduits (dikes). However, the superposition of stress states from crustal resurfacing/recycling and mountain loading can result in viable pathways of magma ascent through nearly the entire lithosphere. The viability of these pathways appears to be strongly related to the thickness of the mechanical lithosphere on Io, which is thought to correspond closely to the thickness of Io's crust (pervasive melt generation in Io's upper mantle limits the strength of any mantle contribution to the lithosphere). We superpose stress solutions for subsidence and thermal stress (from resurfacing) in Io's lithosphere with stresses from Io mountain-sized loads (in a shallow spherical shell solution) in order to evaluate magma ascent pathways. We use stress orientation (least compressive stress horizontal) and stress gradient (compression decreasing upwards) criteria to identify ascent pathways through the lithosphere. For resurfacing stress states alone, the ascent criteria are satisfied only in a narrow (5 km or so), roughly mid-lithosphere band. When these stresses are superposed with those from loading of a 150-km-radius, 15-km-tall (pre-flexure) mountain on a lithosphere with elastic lithosphere thickness Te = 50 km, a U-shaped ascent-favorable (AF) zone is produced connecting the deep lithosphere beneath the center of the mountain with the surface at the mountain's periphery. Such zones are seen over a range of mountain radii and heights at Te = 50 km. However, AF zones are disrupted or absent entirely for thinner (Te = 25 km) or thicker (Te = 75 km) lithospheres: for the former, high-magnitude compressive mountain-loading stresses in the upper lithosphere inhibit magma ascent, while for the latter mountain-loading stresses are too low to change the crustal recycling stress state appreciably. Thus, we conclude that there is an optimum lithospheric (and thus, crustal) thickness that facilitates magma ascent pathways associated with Io's mountains. JF - Abstracts with Programs - Geological Society of America AU - McGovern, Patrick J AU - Kirchoff, Michelle R AU - White, Oliver Luke AU - Schenk, Paul M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 635 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366779?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Implications+of+a+crustal+recycling+stress+state+on+Io+for+magma+ascent+pathways%2C+large+mountains%2C+and+thickness+of+the+lithosphere&rft.au=McGovern%2C+Patrick+J%3BKirchoff%2C+Michelle+R%3BWhite%2C+Oliver+Luke%3BSchenk%2C+Paul+M%3BAnonymous&rft.aulast=McGovern&rft.aufirst=Patrick&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=635&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 - Landform evolution modeling of sedimentary processes on icy worlds; the cases of Hyperion and Helene AN - 1673366653; 2015-035608 AB - Sedimentary activity (erosion, transportation and deposition) is a major landscape-shaping process on many icy worlds of the outer solar system for which an understanding of this process is central to their geologic characterizations. Several recent studies, lead by the authors, have identified the effects of sedimentary activity on icy satellite landforms and recognized the role of mass wasting and volatile loss and redistribution in the evolution of these features. We apply state of the art, physics based, landform evolution modeling to icy satellite sedimentary landforms in order to fully quantitatively characterize how their morphologies change with time, and what their present appearances imply for the initial abundance and distribution of loose material, volatiles, and refractories in original pristine landforms. We will present results of our landform evolution modeling to the development of the landscapes of the Saturnian moons of Hyperion and Helene. Our current conclusions for Hyperion are that its unique appearance can be explained in part by the loss to space of ballistic ejecta during impact events. In order to create the smooth surfaces and the reticulate, honeycomb pattern of narrow divides between old craters, appreciable subsequent modification of crater morphology must occur through mass-wasting processes accompanied by sublimation, probably facilitated by the loss of CO (sub 2) as a component of the relief-supporting matrix of the bedrock. This mass wasting effectively destroys small craters, at least in part accounting for the paucity of sub-kilometer craters on Hyperion. Helene's unusual morphology consists of broad depressions (modified large craters) and a generally smooth surface patterned with streaks and grooves. The streaks appear to be oriented down-gradient, as are the grooves. This pattern suggests intensive mass-wasting as a dominant process. Our initial modeling of this surface suggests a Bingham-like rheological behavior for the loose down-slope-moving material. Interestingly, as a Bingham flow, the models indicate that aperiodic "intermittent" behavior to be present, suggesting that periods of quiet steady landform evolution are punctuated short periods of active surface readjustment. JF - Abstracts with Programs - Geological Society of America AU - Moore, Jeffrey M AU - Howard, Alan D AU - Umurhan, Orkan Mehmet AU - White, Oliver Luke AU - Schenk, Paul M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 634 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366653?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Landform+evolution+modeling+of+sedimentary+processes+on+icy+worlds%3B+the+cases+of+Hyperion+and+Helene&rft.au=Moore%2C+Jeffrey+M%3BHoward%2C+Alan+D%3BUmurhan%2C+Orkan+Mehmet%3BWhite%2C+Oliver+Luke%3BSchenk%2C+Paul+M%3BAnonymous&rft.aulast=Moore&rft.aufirst=Jeffrey&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=634&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 - Helene, Calypso, and Telesto; shrinking satellites with deep-seated mass wasting AN - 1673366553; 2015-035609 AB - These small, Lagrangian co-orbital satellites of Dione and Tethys feature generally smooth, relatively young surfaces and degraded impact basins. The otherwise smooth surfaces of Helene and Calypso display shallow, parallel tracks often extending several kilometers; these appear to trend downslope from source regions near crater rims into low points. These tracks are locally separated by slightly higher ridges also trending down-gradient. They record mass transport over surprisingly long distances on these tiny ( approximately 30 km diameter) satellites. Some of the flows are slightly convex in cross section, suggesting deep-seated mass transport. We model these flows as glacier-like flows derived from degradation of crater rims. The rheological properties and speed of emplacement (rapid to very slow) of these flows is uncertain. Saucer-like depressions stand in positive, mesa-like relief on these satellites, which we interpret to be the floors of highly degraded impact craters, implying long-term mass loss from the satellites. JF - Abstracts with Programs - Geological Society of America AU - Howard, Alan D AU - Umurhan, Orkan Mehmet AU - Moore, Jeffrey M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 634 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366553?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Helene%2C+Calypso%2C+and+Telesto%3B+shrinking+satellites+with+deep-seated+mass+wasting&rft.au=Howard%2C+Alan+D%3BUmurhan%2C+Orkan+Mehmet%3BMoore%2C+Jeffrey+M%3BAnonymous&rft.aulast=Howard&rft.aufirst=Alan&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=634&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 - Exploring ancient Mars with the Curiosity Rover; the Mount Sharp expedition in Gale Crater AN - 1673365707; 2015-033855 AB - The instruments of the Curiosity Rover work together to interrogate Mars as this robotic laboratory on wheels moves from site to site in an ancient crater. Cameras, microscopes, and elemental analyzers all work together to find soils to scoop and rocks to drill that will tell us more about ancient Mars. Once a target is identified small samples of powdered material are then delivered to two instruments in the interior of the Curiosity Rover where even more detailed chemical analysis takes place. Mission challenges include not only navagating to Mars and landing a one ton six wheel vehicle safely on the surface, but also designing instruments and rover systems to operate robustly in the harsh radiation and temperature environment of the red planet. A prime exploration target for the Curiosity rover is the central mound (Mt. Sharp) in Gale crater that shows a diverse mineralogy and layered structures from orbital infrared spectroscopy and high resolution imaging. However, many sites of interest including an ancient lake bed have been found along the way. The composition of minerals and the isotopic composition of gases in the atmosphere and of atoms and compounds released from rocks tells us much about how conditions on present Mars have changed from the distant past. We will discuss how results from Curiosity on Mars have revealed the age of rocks and wind erosion rates of surface materials. We will compare Curiosity results with studies of meteorites that have made their way from Mars to Earth following crater-forming impacts on Mars. We will tell the story of the search for organic compounds with Curiosity and its organics analyzer SAM. All these studies are designed to study the potential of ancient Mars to support microbial life and better understand why our sister planet is so different from Earth. JF - Abstracts with Programs - Geological Society of America AU - Mahaffy, Paul R AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 632 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673365707?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Exploring+ancient+Mars+with+the+Curiosity+Rover%3B+the+Mount+Sharp+expedition+in+Gale+Crater&rft.au=Mahaffy%2C+Paul+R%3BAnonymous&rft.aulast=Mahaffy&rft.aufirst=Paul&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=632&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 - An introduction to the Mars Science Laboratory Curiosity Rover Mission and the sample analysis at Mars Instrument Suite and Education and Public Outreach Program AN - 1673365642; 2015-033857 AB - The Mars Science Laboratory Curiosity rover landed in Gale Crater in August 2012. Curiosity is the largest rover with the most advanced suite of scientific instruments ever to explore another planet. Its size and mass required engineers to devise an entirely new landing technique to land Curiosity safely, and it became the first Mars rover to land with its wheels on the ground, ready to go. The primary science goal for this mission is to quantitatively assess the habitability of environments preserved in Gale Crater to determine whether they could have supported life at some time in the past, or even today. Instruments onboard Curiosity are collecting data that enable scientists to analyze the geology and geochemistry of Gale Crater, including the role that water has played in shaping and influencing this landscape, and characterize the surface radiation environment. These investigations provide context for the environments recorded in Gale Crater, helping scientists better understand how they formed, how they evolved, and what effect that might have had on the preservation of evidence of life, if it ever existed in the crater. Curiosity has allowed scientists to make a number of important discoveries during its primary mission. Data from its instruments reveal abundant evidence of past water in Gale Crater. It has confirmed that Mars's atmosphere is enriched in heavy isotopes, indicating that much of the martian atmosphere has been lost. Curiosity enabled the determination of the first age and surface exposure dates for rocks on Mars, from the surface of Mars. And, Curiosity data shows evidence of an ancient habitable environment in Gale Crater. At the time of writing, Curiosity is exploring The Kimberley formation, an interesting intersection of multiple terrain types along the path to Curiosity's ultimate destination: a 5-km-high mountain in the middle of Gale Crater called Mount Sharp. I will provide a brief overview of the Mars Science Laboratory Curiosity rover mission to set the stage for the 'Curiosity on Mars' session. I will highlight the Sample Analysis at Mars (SAM) instrument suite, a powerful trio of instruments onboard Curiosity that analyze rock, soil, and atmospheric samples, and will share information about the SAM Education and Public Outreach program. JF - Abstracts with Programs - Geological Society of America AU - Jones, Andrea J P AU - Bleacher, Lora V AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 632 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673365642?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=An+introduction+to+the+Mars+Science+Laboratory+Curiosity+Rover+Mission+and+the+sample+analysis+at+Mars+Instrument+Suite+and+Education+and+Public+Outreach+Program&rft.au=Jones%2C+Andrea+J+P%3BBleacher%2C+Lora+V%3BAnonymous&rft.aulast=Jones&rft.aufirst=Andrea+J&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=632&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 - Martian impact structures exposed in cross-section; windows into the subsurface AN - 1673365197; 2015-033865 AB - Using stereo pairs of images from the High Resolution Imaging Science Experiment (HiRISE) camera on MRO, we have conducted a systematic survey of impact craters along the edges of the Valles Marinaris canyon system that have been cut by a combination of tectonism and erosion and are now exposed in cross-section. These 'cut craters' permit unique access into the subsurface structure of impact craters, and provide better exposure than is typically available for terrestrial impact structures. Here we directly assess elements of both exterior and interior crater geometry. Quantifiable exterior elements include the radial decay of eject thickness and degree of rim uplift. Exposed interior elements include the depth of layer disruption and nature of crater infill, which is expected to vary in response to the style of sedimentation responsible for the infill (e.g., mass wasting, eolian, or fluvial processes). Results from ejecta measurements are broadly consistent with predictions of a (r/R) (super (-3)) dependence. Crater interior fill indicates numerous flat-lying layers in some older, larger exposed structures, suggestive of a past epoch of enchanced crater gradation in which fluvial processes may have played a role. JF - Abstracts with Programs - Geological Society of America AU - Thomson, Bradley James AU - Beyer, Ross AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 761 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673365197?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Martian+impact+structures+exposed+in+cross-section%3B+windows+into+the+subsurface&rft.au=Thomson%2C+Bradley+James%3BBeyer%2C+Ross%3BAnonymous&rft.aulast=Thomson&rft.aufirst=Bradley&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=761&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 - Heat-pipe cooling as a universal process of hot terrestrial planets AN - 1668232374; 2015-031555 AB - On all terrestrial bodies other than Earth, endogenic resurfacing has been dominated by volcanic landforms. When volcanism dominates heat transport, a terrestrial body enters a heat-pipe mode, in which hot magma moves through the lithosphere in narrow channels. Even at high heat flow, a heat-pipe planet develops a thick, cold, downward-advecting lithosphere dominated by mafic/ultra-mafic flows and contractional deformation at the surface. Active heat-pipe cooling controls the tectonics of Jupiter's moon Io, the hottest terrestrial body in the Solar system due to tidal heating. Recent work suggests that the geologic record of early Earth is consistent with first-order predictions of heat-pipe cooling until approximately 3.2 Ga. Here, we review the geological constraints of the other terrestrial bodies in the Solar system: Mercury, Venus, the Moon, and Mars. We demonstrate that these geologic records are also consistent with early heat-pipe cooling, followed by transitions to single-plate, rigid-lid convective phases. We conclude that heat-pipe cooling is a universal process experienced by all terrestrial bodies of sufficient size. Terrestrial exoplanets appreciably larger than Earth may remain in heat-pipe mode for much of the lifespan of a Sun-like star. JF - Abstracts with Programs - Geological Society of America AU - Webb, A Alexander G AU - Moore, William B AU - Simon, Justin I AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 282 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 18:Solid-earth geophysics KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668232374?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Heat-pipe+cooling+as+a+universal+process+of+hot+terrestrial+planets&rft.au=Webb%2C+A+Alexander+G%3BMoore%2C+William+B%3BSimon%2C+Justin+I%3BAnonymous&rft.aulast=Webb&rft.aufirst=A+Alexander&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=282&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 - Turbulent concentration of mm-size particles in the protoplanetary nebula; scale-dependent multiplier functions AN - 1668231042; 2015-027401 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Cuzzi, Jeffrey N AU - Hartlep, T AU - Weston, B AU - Shariff, K AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2764 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - scale factor KW - Stokes number KW - accretion KW - statistical analysis KW - turbulence KW - planetesimals KW - simulation KW - protoplanetary disk KW - physical models KW - multiplier KW - probability density function KW - models KW - spatial distribution KW - size distribution KW - cosmic dust KW - dust cloud KW - nebulae KW - eddies KW - chondrules KW - probability KW - particles KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668231042?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Turbulent+concentration+of+mm-size+particles+in+the+protoplanetary+nebula%3B+scale-dependent+multiplier+functions&rft.au=Cuzzi%2C+Jeffrey+N%3BHartlep%2C+T%3BWeston%2C+B%3BShariff%2C+K%3BAnonymous&rft.aulast=Cuzzi&rft.aufirst=Jeffrey&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/2764.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 14 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Aug. 22, 2014 N1 - Last updated - 2015-08-13 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - accretion; chondrules; cosmic dust; dust cloud; eddies; models; multiplier; nebulae; particles; physical models; planetesimals; probability; probability density function; protoplanetary disk; scale factor; simulation; size distribution; spatial distribution; statistical analysis; Stokes number; turbulence ER - TY - JOUR T1 - Estimating daily NO (sub 2) concentrations using OMI NO (sub 2) and land use regression AN - 1668229666; 2015-027992 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Lee, Yung Joo AU - Koutrakis, Petros AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1385 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - monitoring KW - pollutants KW - pollution KW - effects KW - nitrogen dioxide KW - land use KW - public health KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229666?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Estimating+daily+NO+%28sub+2%29+concentrations+using+OMI+NO+%28sub+2%29+and+land+use+regression&rft.au=Lee%2C+Yung+Joo%3BKoutrakis%2C+Petros%3BAnonymous&rft.aulast=Lee&rft.aufirst=Yung&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1385&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 - effects; land use; monitoring; nitrogen dioxide; pollutants; pollution; public health ER - TY - JOUR T1 - Refining the chemistry of Mars; comparing VNIR and TIR spectra of clay-bearing rocks AN - 1668229417; 2015-029301 AB - Aqueous processes are inferred on Mars in numerous locations where clays have been identified using OMEGA and CRISM data. While most studies use lab spectra of pure minerals as a basis for identification of clays, we have measured visible/near-infrared (VNIR) reflectance spectra, thermal region infrared (TIR) emissivity spectra, and gathered x-ray diffraction (XRD) data of clay-bearing terrestrial rocks. This process will allow coordinated analysis of multiple data sets for comparison with Martian spectra and CheMin data. Stretching overtone bands of OH near 1.4 mu m and of H (sub 2) 0 near 1.9 mu m, as well as OH stretching and bending combination bands near 2.20-2.21 mu m for Al/Si, 2.29 mu m for Fe3+, and 2.30-2.31 mu m for Mg are VNIR signatures indicative of clay minerals. TIR signatures include a doublet near 450-600 cm (super -1) for dioctahedral phyllosilicates and a single band near 475 cm (super -1) for trioctahedral phyllosilicates. For this study three Al-rich clay-bearing rocks, two Fe-rich clay-bearing rocks, and two altered quartz-bearing rocks were measured for VNIR, TIR, and XRD analyses. An example of the usefulness of these comparisons can be seen in the Delamar Mine beidellite-bearing rock. The Delamar mine rock exhibits bands near 1.4, 1.9 and 2.2 mu m, correlating with the XRD analysis showing that the rock is primarily smectite. The XRD data also shows that the Delamar mine rock is approximately 5-10% quartz, which does not exhibit features in the VNIR region but can be seen in the TIR data as an Si-O stretching vibration doublet with endpoints in the 1078-1212 cm (super -1) range. However, montmorillonite and opal (both typical components of smectite bearing rocks) exhibit endpoints near this region as well. Obtaining library data sets for rocks that contain key components of minerals that are found on Mars may enable more refined and accurate spectroscopy data analysis than modeling alone, allowing for a better interpretation of the history of the nearest habitable planet to Earth. JF - Abstracts with Programs - Geological Society of America AU - Davis, April C AU - Bishop, Janice L AU - Veto, Michael AU - Ruff, Steven W AU - Bristow, Thomas F AU - Gates, Will P AU - Blake, David AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 339 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 06A:Sedimentary petrology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229417?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Refining+the+chemistry+of+Mars%3B+comparing+VNIR+and+TIR+spectra+of+clay-bearing+rocks&rft.au=Davis%2C+April+C%3BBishop%2C+Janice+L%3BVeto%2C+Michael%3BRuff%2C+Steven+W%3BBristow%2C+Thomas+F%3BGates%2C+Will+P%3BBlake%2C+David%3BAnonymous&rft.aulast=Davis&rft.aufirst=April&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=339&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 - Number of references - 3 N1 - PubXState - CO N1 - Last updated - 2015-04-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - A review of low velocity impacts on Phobos AN - 1668229041; 2015-029297 AB - For this research we review the morphology and distribution of craters on Phobos. We describe crater characteristics and ejecta features of the differentiated layers resulting from low-velocity impacts. We compared spacecraft imagery from Viking to MRO as a technique to determine changes in surface features on Phobos. JF - Abstracts with Programs - Geological Society of America AU - Smith, Heather AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 338 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229041?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=A+review+of+low+velocity+impacts+on+Phobos&rft.au=Smith%2C+Heather%3BAnonymous&rft.aulast=Smith&rft.aufirst=Heather&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=338&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 - High resolution correlation of Eocene lake deposits (Green River Formation, Wyoming) using Sr-isotope chemostratigraphy AN - 1664439083; 2015-024089 AB - Lacustrine deposits are often difficult to accurately correlate, due to their intrinsically high spatial and temporal variability. In this study we investigate the use of Sr-isotope chemostratigraphy to develop a high-resolution correlation between two rock cores of the Eocene Green River Formation (Black Fork core #1 and White Mountain core #1). In the Black Forks core #1, (super 87) Sr/ (super 86) Sr ratios range from 0.71156 to 0.71482, with an average of 0.71252. In the White Mountain core #1, (super 87) Sr/ (super 86) Sr ratios range from 0.71154 to 0.71504, with an average of 0.71268. Lower ratios consistently correspond to deeper (profundal) lacustrine facies, and higher ratios correspond to shallower (littoral and lake plain) facies. (super 87) Sr/ (super 86) Sr ratios do not correlate to sample mineralogy. We therefore conclude that they record changing provenance of Eocene Lake Gosiute waters during lake level fluctuations, rather than fractionation during carbonate precipitation. We infer from these results that Sr was well mixed in the central part of Eocene Lake Gosiute, across spatial scales of at least tens of km. (super 87) Sr/ (super 86) Sr in the carbonate-rich lake deposits therefore provides a unique means of establishing temporal correlations within lacustrine strata, based on changes in lake water provenance through time. JF - Abstracts with Programs - Geological Society of America AU - Baddouh, M'bark AU - Carroll, Alan R AU - Meyers, Stephen R AU - Beard, Brian L AU - Johnson, Clark AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 379 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664439083?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=High+resolution+correlation+of+Eocene+lake+deposits+%28Green+River+Formation%2C+Wyoming%29+using+Sr-isotope+chemostratigraphy&rft.au=Baddouh%2C+M%27bark%3BCarroll%2C+Alan+R%3BMeyers%2C+Stephen+R%3BBeard%2C+Brian+L%3BJohnson%2C+Clark%3BAnonymous&rft.aulast=Baddouh&rft.aufirst=M%27bark&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=379&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-03-19 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Deep subsurface sulfate reduction and methanogenesis in the Iberian pyrite belt revealed through geochemistry and molecular biomarkers AN - 1664433572; 2015-022862 AB - The Iberian Pyrite Belt (IPB, southwest of Spain), the largest known massive sulfide deposit, fuels a rich chemolithotrophic microbial community in the Rio Tinto area. However, the geomicrobiology of its deep subsurface is still unexplored. Herein, we report on the geochemistry and prokaryotic diversity in the subsurface (down to a depth of 166 m) of the Iberian Pyritic belt using an array of geochemical and complementary molecular ecology techniques. Using an antibody microarray, we detected polymeric biomarkers (lipoteichoic acids and peptidoglycan) from Gram-positive bacteria throughout the borehole. DNA microarray hybridization confirmed the presence of members of methane oxidizers, sulfate-reducers, metal and sulfur oxidizers, and methanogenic Euryarchaeota. DNA sequences from denitrifying and hydrogenotrophic bacteria were also identified. FISH hybridization revealed live bacterial clusters associated with microniches on mineral surfaces. These results, together with measures of the geochemical parameters in the borehole, allowed us to create a preliminary scheme of the biogeochemical processes that could be operating in the deep subsurface of the Iberian Pyrite Belt, including microbial metabolisms such as sulfate reduction, methanogenesis and anaerobic methane oxidation. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - Geobiology AU - Puente-Sanchez, F AU - Moreno-Paz, M AU - Rivas, L A AU - Cruz-Gil, P AU - Garcia-Villadangos, M AU - Gomez, M J AU - Postigo, M AU - Garrido, P AU - Gonzalez-Toril, E AU - Briones, C AU - Fernandez-Remolar, D AU - Stoker, C AU - Amils, R AU - Parro, V Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 34 EP - 47 PB - Wiley, Oxford VL - 12 IS - 1 SN - 1472-4677, 1472-4677 KW - Iberian pyrite belt KW - sulfates KW - living taxa KW - Spain KW - metabolism KW - Europe KW - Iberian Peninsula KW - biomarkers KW - Huelva Spain KW - Southern Europe KW - organic compounds KW - nucleic acids KW - boreholes KW - Andalusia Spain KW - ion chromatograms KW - chromatograms KW - bacteria KW - DNA KW - Rio Tinto Spain KW - reduction KW - polymers KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664433572?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Deep+subsurface+sulfate+reduction+and+methanogenesis+in+the+Iberian+pyrite+belt+revealed+through+geochemistry+and+molecular+biomarkers&rft.au=Puente-Sanchez%2C+F%3BMoreno-Paz%2C+M%3BRivas%2C+L+A%3BCruz-Gil%2C+P%3BGarcia-Villadangos%2C+M%3BGomez%2C+M+J%3BPostigo%2C+M%3BGarrido%2C+P%3BGonzalez-Toril%2C+E%3BBriones%2C+C%3BFernandez-Remolar%2C+D%3BStoker%2C+C%3BAmils%2C+R%3BParro%2C+V&rft.aulast=Puente-Sanchez&rft.aufirst=F&rft.date=2014-01-01&rft.volume=12&rft.issue=1&rft.spage=34&rft.isbn=&rft.btitle=&rft.title=Geobiology&rft.issn=14724677&rft_id=info:doi/10.1111%2Fgbi.12065 L2 - http://www.blackwellpublishing.com/journal.asp?ref=1472-4677 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 45 N1 - Document feature - illus. incl. strat. col. N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Andalusia Spain; bacteria; biomarkers; boreholes; chromatograms; DNA; Europe; Huelva Spain; Iberian Peninsula; Iberian pyrite belt; ion chromatograms; living taxa; metabolism; nucleic acids; organic compounds; polymers; reduction; Rio Tinto Spain; Southern Europe; Spain; sulfates DO - http://dx.doi.org/10.1111/gbi.12065 ER - TY - JOUR T1 - Toward a more aquatic future; rising seas and coastal storms in New York City AN - 1664433179; 2015-023773 AB - Following Hurricane Sandy (October 2012), New York City launched the Special Initiative for Rebuilding and Resiliency (SIRR) program to protect against current and future climate hazards. In support of this work, the New York City Panel on Climate Change (NPCC) developed a new methodology for projecting future sea level rise tailored to localized conditions, up to the year 2100, in order to provide decision-makers with updated climate risk information to safeguard coastal residents and critical infrastructure. Sea level rise (SLR) components include global thermal expansion and local dynamic ocean heights from AR5 IPCC 2013 CMIP5 RCP4.5 and 8.5 data, revised estimates of ice mass loss from glaciers and ice sheets, gravitational/rotational/isostatic "fingerprints", glacial isostatic adjustments, and land water storage. The projections simulate future sea level for three time slices, using two representative concentration pathways and 24 GCM models. The SLR projections, closely linked to hydrodynamic surge models, yield improved estimates of future coastal flooding probabilities. Sea levels at the Battery, lower Manhattan could reach 20 and 76 cm by the 2050s, and 33 and 147 cm by the 2080s for the 10th and 90th percentiles, respectively. Assuming no change in storm characteristics, higher sea levels would sharply increase the frequency and intensity of coastal flooding. Flood heights for the 100-year storm (stillwater) would rise from 3.4 m in the 2000s to 3.8-4.9 m by the 2080s (10-90 percentile), above NAVD88. The annual chance of today's 100-year flood would increase from 1 to 1.7-12.7 percent by the 2080s. Future sea levels would significantly increase the area potentially at risk to flooding. Providing planners with a broad range of science-based potential outcomes informs decision-making on different types of climate change adaptation, including infrastructure, taking into account adaptation lifetime and uncertainty estimates. JF - Abstracts with Programs - Geological Society of America AU - Gornitz, Vivien AU - Horton, Radley AU - Bader, D A AU - Little, C AU - Rosenzweig, Cynthia AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 179 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664433179?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Toward+a+more+aquatic+future%3B+rising+seas+and+coastal+storms+in+New+York+City&rft.au=Gornitz%2C+Vivien%3BHorton%2C+Radley%3BBader%2C+D+A%3BLittle%2C+C%3BRosenzweig%2C+Cynthia%3BAnonymous&rft.aulast=Gornitz&rft.aufirst=Vivien&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=179&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/2014AM/webprogram/Paper243742.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-03-19 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Mission applications support at NASA; the Gravity Recovery and Climate Experiment (GRACE) Missions AN - 1660632784; 2015-019202 AB - GRACE is an international success story in cooperative satellite remote sensing science that has revolutionized the understanding of decadal- and sub-decadal-scale water movement across the globe. With over 12 years of monthly data on global mass variations, it is providing unprecedented observations of global change. The relevance of GRACE for hydrologic research is significant and growing. GRACE data are currently being used operationally by the NOAA Drought Mitigation Center, and in the State of California 2013 Water Plan. A recent study points to the utility of GRACE for flood forecasting. Along with German space agency partners, NASA plans to launch the GRACE Follow On (GRACE-FO) mission in 2017 to extend this important time series of global gravity data. Enhanced technologies on the proposed GRACE-2 mission would carry this important data into the next decade. This series of space gravimetry missions are, therefore, one of the most utilitarian of NASA's missions for observing climate change and record trends in the global hydrosphere and cryosphere. The NASA Applied Sciences Program actively promotes a formalized applications program to support Earth science missions in the flight planning process. The goal is to engage applications-oriented users and organizations and to promote applied uses of the mission data. This includes integrating end-user needs into processing strategies for level-2 data product development, thus increasing the benefits of the space program to the nation. Successful strategies to enhance science and practical applications of current and future GRACE missions data streams will require engaging with representatives in the science, societal applications, and mission planning communities. Some key objectives include: . Engage a core current user community for data from the GRACE missions, . Coordinate an applications team, including GRACE Project leads, data experts and international partners . Optimize access to information about the GRACE missions capabilities, as well as base and higher level data products in order to effectively engage all potential users Our focus: engage the science community, identify applications and users, develop infrastructure (plan, printed products, etc.), conduct user workshops, assess user data needs and access, and provide decision support. JF - Abstracts with Programs - Geological Society of America AU - Srinivasan, Margaret M AU - Ivins, Erik R AU - Jasinski, Michael F AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 68 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660632784?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Mission+applications+support+at+NASA%3B+the+Gravity+Recovery+and+Climate+Experiment+%28GRACE%29+Missions&rft.au=Srinivasan%2C+Margaret+M%3BIvins%2C+Erik+R%3BJasinski%2C+Michael+F%3BAnonymous&rft.aulast=Srinivasan&rft.aufirst=Margaret&rft.date=2014-01-01&rft.volume=46&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, 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 - Microbial influence on pyrite and iron oxide in the Prairie Bluff Formation, Starkville Mississippi AN - 1660632753; 2015-019328 AB - The objective of this study was to determine if microbes were associated with pyrite, gypsum, and iron oxide found in the Prairie Bluff Formation in Starkville, Mississippi and if so, to determine if associated chemical processes contributed to the formation of these minerals. Gray to black nodules (1-3 cm) were composed of quartz and calcite, and burrows (10-100 cm) were delineated by layers of iron oxide, gypsum, and pyrite. Students collected samples in the field and prepared them for XRD analysis, SEM, confocal, and petrographic microscopy. In the collected samples, chains of bacilliform bacteria were discovered as well as fungal hyphae >10 microns wide, bacilliform microbes and filamentous bacteria <5 microns wide. Organic matter was abundant in the form of fungal filaments, bacilliform microbes, and amorphous desiccated organic matter. Evidence of dissolution was also abundant throughout all the samples. Dissolution seemed to be associated with abundant microbial material and seemed to be greater along marked zones. Organic substances likely played a role in dissolution and probably contributed to precipitation; however, the results are inconclusive as to whether or not organic matter played a role in crystallization. JF - Abstracts with Programs - Geological Society of America AU - Testa, Maurice P AU - Babineaux, Claire AU - Bise, Robert D AU - Kirkland, Brenda AU - Hollis, Laura AU - Murray, Bonnie AU - Bychowski, Matthew AU - Wise Bellard, Michelle AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 357 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660632753?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Microbial+influence+on+pyrite+and+iron+oxide+in+the+Prairie+Bluff+Formation%2C+Starkville+Mississippi&rft.au=Testa%2C+Maurice+P%3BBabineaux%2C+Claire%3BBise%2C+Robert+D%3BKirkland%2C+Brenda%3BHollis%2C+Laura%3BMurray%2C+Bonnie%3BBychowski%2C+Matthew%3BWise+Bellard%2C+Michelle%3BAnonymous&rft.aulast=Testa&rft.aufirst=Maurice&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=357&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 - Gypsum, pyrite, and iron oxides in the Ripley Formation, Oktibbeha County, Mississippi AN - 1660631752; 2015-019327 AB - The intent of this study was to determine if microbes within the Ripley Formation in Oktibbeha County, Mississippi play a role in the formation of 2-3 cm thick layers of gypsum crystals, calcite, pyrite, and iron oxide. Students collected samples in the field and prepared them for petrographic and confocal imaging, as well as scanning electron microscopy (SEM) and XRD analysis. The outcrop studied was approximately 50X16 m exposing roughly 6.5 m of silty chalk. Gypsum crystals found near the base of the Ripley Formation at the surface of the outcrop appear to have formed in situ based on delicate crystal orientation. Pyrite nodules are abundant at the base of the outcrop as well as large (10-20 cm) Exogyra cancellata. XRD analysis revealed that pyrite nodules contain gypsum and quartz. Using SEM, gypsum crystals appeared to form underneath Cretaceous coccolith fragments. Pronounced dissolution of gypsum and pyrite crystal remnants is common, sometimes occurring along sharp interfaces directly opposite abundant amorphous organic matter. SEM images indicate an abundance of microorganisms. Fungal hyphae (>10 mu m wide), filamentous bacteria (<5 mu m wide), and dehydrated biofilm were found along with possible coccoid bacteria. XRD data show the presence of pyrite and gypsum, which suggest microbial influences on their formation. This research is applicable to studies of sulfate reducing bacteria, descriptive research on Mars, environmental hazards, mine waste, coal scrubbing, and acidic soils. JF - Abstracts with Programs - Geological Society of America AU - Killian, Courtney AU - Bridges, Susan AU - Kirkland, Brenda AU - Meeks, Christina AU - Olsson, Ola AU - Pierce, Patrick AU - Tavernier, Lyle AU - Weremeichik, Jeremy M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 356 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660631752?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Gypsum%2C+pyrite%2C+and+iron+oxides+in+the+Ripley+Formation%2C+Oktibbeha+County%2C+Mississippi&rft.au=Killian%2C+Courtney%3BBridges%2C+Susan%3BKirkland%2C+Brenda%3BMeeks%2C+Christina%3BOlsson%2C+Ola%3BPierce%2C+Patrick%3BTavernier%2C+Lyle%3BWeremeichik%2C+Jeremy+M%3BAnonymous&rft.aulast=Killian&rft.aufirst=Courtney&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=356&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 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 - ENSO Teleconnection Pattern Changes over the Southeastern United States under a Climate Change Scenario in CMIP5 Models AN - 1660386737; PQ0001138261 AB - A strong teleconnection exists between the sea surface temperature (SST) over the tropical Pacific and the winter precipitation in the southeastern United States (SE US). This feature is adopted to validate the fidelity of Coupled Model Intercomparison Project Phase 5 (CMIP5) in this study. In addition, the authors examine whether the teleconnection pattern persists in the future under a global warming scenario. Generally, most of the eight selected models show a positive correlation between November SST over Nino 3 region and December-February (DJF) mean daily precipitation anomalies over the SE US, consistent with the observation. However, the models with poor realization of skewness of Nino indices fail to simulate the realistic teleconnection pattern in the historical simulation. In the Representative Concentration Pathways 8.5 (RCP8.5) run, all of the models maintain positive and slightly increased correlation patterns. It is noteworthy that the region with strong teleconnection pattern shifts northward in the future. Increased variance of winter precipitation due to the SST teleconnection is shown over Alabama and Georgia rather than over Florida under the RCP8.5 scenario in most of the models, differing from the historical run in which the precipitation in Florida is the most attributable to the eastern Pacific SST. JF - Advances in Meteorology AU - Oh, Ji-Hyun AU - Shin, D W AU - Cocke, Steven D AU - Baigorria, Guillermo A AD - Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, CA 90095-7228, USA, ji-hyun.oh@jpl.nasa.gov Y1 - 2014/01// PY - 2014 DA - January 2014 PB - Hindawi Publishing Corporation, P.O. Box 3079 Cuyahoga Falls OH 44223 United States VL - 2014 SN - 1687-9309, 1687-9309 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts; Sustainability Science Abstracts KW - Historical account KW - Sea surface KW - ASW, USA, Alabama KW - Rainfall KW - Climate change KW - Correlations KW - USA, Southeast KW - IS, Tropical Pacific KW - Winter KW - Teleconnection patterns KW - Sea surface temperature anomalies KW - Meteorology KW - Sea surface temperatures KW - Daily precipitation KW - Teleconnections KW - Modelling KW - Atmospheric precipitations KW - Marine KW - ASW, USA, Florida KW - Climate models KW - Temperature KW - Brackish KW - Simulation KW - Greenhouse effect KW - Precipitation KW - Water temperature KW - Southern Oscillation KW - ASW, USA, Georgia KW - Atmosphere-ocean coupled models KW - Numerical simulations KW - El Nino-Southern Oscillation event KW - Global warming KW - Winter precipitation KW - Climate change scenarios KW - O 8010:Books KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development KW - Q2 09244:Air-sea coupling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660386737?accountid=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=Advances+in+Meteorology&rft.atitle=ENSO+Teleconnection+Pattern+Changes+over+the+Southeastern+United+States+under+a+Climate+Change+Scenario+in+CMIP5+Models&rft.au=Oh%2C+Ji-Hyun%3BShin%2C+D+W%3BCocke%2C+Steven+D%3BBaigorria%2C+Guillermo+A&rft.aulast=Oh&rft.aufirst=Ji-Hyun&rft.date=2014-01-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Advances+in+Meteorology&rft.issn=16879309&rft_id=info:doi/10.1155%2F2014%2F648197 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Atmospheric precipitations; Sea surface; Climate change; Meteorology; Greenhouse effect; Water temperature; Southern Oscillation; Modelling; Teleconnections; Climate models; Correlations; Precipitation; Teleconnection patterns; Sea surface temperature anomalies; Atmosphere-ocean coupled models; Numerical simulations; El Nino-Southern Oscillation event; Global warming; Winter precipitation; Daily precipitation; Sea surface temperatures; Climate change scenarios; Historical account; Rainfall; Temperature; Simulation; Winter; ASW, USA, Florida; ASW, USA, Georgia; ASW, USA, Alabama; USA, Southeast; IS, Tropical Pacific; Marine; Brackish DO - http://dx.doi.org/10.1155/2014/648197 ER - TY - JOUR T1 - Modeling of sublimation-driven erosion and ice Pinnacle Formation on Callisto AN - 1656039327; 2015-016023 AB - Most of the areas observed at high resolution on the Galilean satellite Callisto have a morphology that implies sublimation-driven landform modification and mass wasting is at work [Moore et al., 1999]. These areas comprise rolling dark plains with interspersed bright pinnacles. Howard and Moore [2008], using the MARSSIM landform evolution model, simulated evolution of this landscape as a combination of bedrock volatile sublimation, mass wasting of the dark, non-coherent residue, and redeposition of ice at high-elevation cold traps sheltered from thermal re-radiation to form the pinnacles. Howard and Moore [2008] was essentially a feasibility study that showed that formation of the pinnacles through sublimation and redeposition of bedrock volatiles was a viable process. The goal of our study is to further investigate the details of pinnacle formation by refining this model, and by constraining values for the variable environmental parameters within the model such that they are consistent with the current understanding of Callisto's surface environment. We present the results of the updated model and our experimentation with varying key parameters. Our refinement of the model has caused us to revise the result of Howard and Moore [2008] that the pinnacles represent an ice cover of several tens to hundreds of meters. Instead, our results indicate an ice coverage reaching several meters at most, a figure that is consistent with the prediction of Moore et al. [2004]. We have also modified the model such that ice contained within the pinnacles is now subject to sublimation itself. Using Fick's Law to solve for the diffusive transport rate between a volatile table and an atmosphere [Moore et al., 1996], we have determined that the loss rate of H (sub 2) O ice from the volatile-refractory bedrock through sublimation is too slow ( approximately 10 (super -20) kg m (super -2) s (super -1) ) to account for the formation of the ice pinnacles, and that a volatile mixture that contains H (sub 2) O ice is necessary to facilitate its loss. We find that CO (sub 2) hydrate fulfills this role well: loss rates of CO (sub 2) .6H (sub 2) O ( approximately 10 (super -10) kg m (super -2) s (super -1) ) are sufficient to produce deposited ice thicknesses reaching several meters, with the volatile CO (sub 2) resulting from dissociation remaining in the tenuous atmosphere [Carlson, 1999; Liang et al., 2005]. JF - Abstracts with Programs - Geological Society of America AU - White, Oliver Luke AU - Umurhan, Orkan Mehmet AU - Howard, Alan D AU - Moore, Jeffrey AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 218 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039327?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+sublimation-driven+erosion+and+ice+Pinnacle+Formation+on+Callisto&rft.au=White%2C+Oliver+Luke%3BUmurhan%2C+Orkan+Mehmet%3BHoward%2C+Alan+D%3BMoore%2C+Jeffrey%3BAnonymous&rft.aulast=White&rft.aufirst=Oliver&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=218&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 - Magnetic and gravity surveys for imaging the geology of the South Pole-Aitken Basin on the Moon AN - 1656036900; 2015-013677 AB - Magnetic and gravity anomalies on the Earth are often the consequence of igneous activity, and provide insight into the processes active during that igneous activity. An abundance of dikes should exist in the crust of the Moon, just as on the Earth. It is expected that most dikes were probably emplaced early in the Moon's history, before compressive stress reached present levels, and that most of those dikes reside in the lower crust. Dike swarms are common in the Earth's crust and they often have magnetic signatures acquired as their magnetic minerals cool below their Curie temperature. We report and interpret observations over the South Pole-Aitken (SPA) basin from three satellite missions to map the magnetic and gravity fields of the Moon. This far-side basin is one of the largest and oldest in the solar system, and it's impact origin set the stage for many of the Moon's first-order characteristics. A set of WNW-trending linear to arcuate magnetic features, evident in both the radial and scalar magnetic field observations, covers much of a 1000 km wide region centered on the NW portion of SPA. We infer that the magnetic features represent dike swarms that served as feeders for mare basalts on the surface. Gravity observations also reveal the presence of dikes in the SPA region, but those dikes have a variety of trends, and are not identical with the magnetically identified dikes. We discuss possible scenarios to explain these observations. JF - Abstracts with Programs - Geological Society of America AU - Purucker, Michael AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 60 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036900?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Magnetic+and+gravity+surveys+for+imaging+the+geology+of+the+South+Pole-Aitken+Basin+on+the+Moon&rft.au=Purucker%2C+Michael%3BAnonymous&rft.aulast=Purucker&rft.aufirst=Michael&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=60&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 - Teaching geoscience and astrobiology at Lassen Volcanic National Park AN - 1656036759; 2015-013583 AB - The Lassen Astrobiology Intern Program was established six years ago as a partnership between the NASA Ames Astrobiology Institute, Red Bluff High School, and the Lassen Volcanic National Park Service. The program is set up as an extracurricular course for juniors and seniors at Red Bluff High School and taught by scientists at NASA Ames and Park Rangers from Lassen Volcanic National Park. The aim of the program is to give students hands-on experience utilizing the scientific method to investigate the habitability of hydrothermal systems at Lassen. The program is based on geologic, hydrologic, and biologic fieldwork at Lassen Volcanic National Park and associated laboratory experiments and sample analyses. The program develops students' skills in observation, note-taking, measurement, data analysis and synthesis, while exposing them to natural environments they have not previously experienced and potential career paths in the natural sciences. The 'extreme' environments that exist in the hydrothermal systems at Lassen highlight the key processes at play in determining habitability in the present day as well as on the early Earth and Mars. As such, we have found this 'place-based approach' to be very engaging for students, piquing their interest via the exotic locale as well as the high contrast in conditions between the hydrothermal sites and more clement environments. As educators, basing the course on a complex and dynamic field locale encourages us to continually revise and adapt the course to changing field conditions, keeping the driving scientific questions fresh for both us and the students. JF - Abstracts with Programs - Geological Society of America AU - Fristad, Kirsten E AU - Des Marais, David J AU - Dueck, Sandra AU - Kubo, Michael AU - Parenteau, Mary N AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 44 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/1656036759?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Teaching+geoscience+and+astrobiology+at+Lassen+Volcanic+National+Park&rft.au=Fristad%2C+Kirsten+E%3BDes+Marais%2C+David+J%3BDueck%2C+Sandra%3BKubo%2C+Michael%3BParenteau%2C+Mary+N%3BAnonymous&rft.aulast=Fristad&rft.aufirst=Kirsten&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=44&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 - Effects of urban and biomass burning sources on aerosol and trace-gases; regional scale simulations combined with airborne remote sensing measurements during TCAP and their link to spaceborne observations AN - 1656036749; 2015-017003 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Segal-Rosenheimer, Michal AU - Yohei, Shinozuka AU - Fast, Jerome AU - Berg, Larry AU - Shilling, John AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2244 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - in situ KW - biomass KW - pollution KW - effects KW - simulation KW - satellite methods KW - urban environment KW - measurement KW - gases KW - models KW - aerosols KW - nitrogen dioxide KW - remote sensing KW - airborne methods KW - 20:Applied geophysics KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036749?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Effects+of+urban+and+biomass+burning+sources+on+aerosol+and+trace-gases%3B+regional+scale+simulations+combined+with+airborne+remote+sensing+measurements+during+TCAP+and+their+link+to+spaceborne+observations&rft.au=Segal-Rosenheimer%2C+Michal%3BYohei%2C+Shinozuka%3BFast%2C+Jerome%3BBerg%2C+Larry%3BShilling%2C+John%3BAnonymous&rft.aulast=Segal-Rosenheimer&rft.aufirst=Michal&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2244&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 - 2 N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - aerosols; airborne methods; biomass; effects; gases; in situ; measurement; models; nitrogen dioxide; pollution; remote sensing; satellite methods; simulation; urban environment ER - TY - JOUR T1 - EarthEd2YC; NASA-NAGT Earth education resources for two-year college faculty AN - 1656036646; 2015-013622 AB - EarthEd2YC is a monthly webinar series for two-year college faculty sponsored by the NASA Science Mission Directorate Education and Public Outreach (SMD E/PO) Earth Forum and the Two Year College Division of the National Association of Geoscience Teachers (NAGT-Geo2YC). EarthEd2YC launched Spring 2014 in response to a documented need for resource dissemination and access for faculty who rarely attend national meetings where educational materials are routinely shared by NASA SMD E/PO professionals. EarthEd2YC is designed to serve both online and traditional classroom faculty. This initiative connects two-year faculty nationwide and provides educational leadership, mentoring, professional development, and community building, while simultaneously disseminating NASA E/PO products and programs to a broader underserved audience. Webinars are 30 minutes long, split equally between presentation and discussion. The pilot will continue through 2014, when EarthEd2YC outcomes will be evaluated. Two year colleges educate more diverse and first generation college students than any other sector in higher education. They also provide STEM coursework for the majority of our Nation's preservice teachers. EarthEd2YC is a venue for E/PO professionals who want to share resources with this important education sector, and a way for Geo2YC and the Earth SMD E/PO Forum to support Earth science faculty that have been historically underserved. We are seeking ideas, participants and collaborators. JF - Abstracts with Programs - Geological Society of America AU - Metlay, Suzanne T AU - Low, Russanne AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 51 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/1656036646?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=EarthEd2YC%3B+NASA-NAGT+Earth+education+resources+for+two-year+college+faculty&rft.au=Metlay%2C+Suzanne+T%3BLow%2C+Russanne%3BAnonymous&rft.aulast=Metlay&rft.aufirst=Suzanne&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=51&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 - Aircraft-based assessment of relationships between CCN concentration and aerosol optical depth AN - 1656036584; 2015-017053 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Shinozuka, Yohei AU - Clarke, Antony D AU - Nenes, Athanasios AU - Lathem, Terry L AU - Redemann, Jens AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2294 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - clouds KW - aerosols KW - satellite methods KW - remote sensing KW - airborne methods KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036584?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Aircraft-based+assessment+of+relationships+between+CCN+concentration+and+aerosol+optical+depth&rft.au=Shinozuka%2C+Yohei%3BClarke%2C+Antony+D%3BNenes%2C+Athanasios%3BLathem%2C+Terry+L%3BRedemann%2C+Jens%3BAnonymous&rft.aulast=Shinozuka&rft.aufirst=Yohei&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2294&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 - aerosols; airborne methods; clouds; remote sensing; satellite methods ER - TY - JOUR T1 - Aberration-corrected Z-contrast imaging and ab initio study of structures and defects in nano-minerals AN - 1656033716; 2015-015346 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Xu, Huifang AU - Shen, Zhizhang AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2754 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - silicates KW - X-ray diffraction data KW - oxyhydroxides KW - oxidation KW - olivine group KW - crystal structure KW - defects KW - TEM data KW - nesosilicates KW - hydroxides KW - dolomite KW - olivine KW - orthosilicates KW - oxides KW - sulfides KW - carbonates KW - minerals KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656033716?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Aberration-corrected+Z-contrast+imaging+and+ab+initio+study+of+structures+and+defects+in+nano-minerals&rft.au=Xu%2C+Huifang%3BShen%2C+Zhizhang%3BAnonymous&rft.aulast=Xu&rft.aufirst=Huifang&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2754&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 - carbonates; crystal structure; defects; dolomite; hydroxides; minerals; nesosilicates; olivine; olivine group; orthosilicates; oxidation; oxides; oxyhydroxides; silicates; sulfides; TEM data; X-ray diffraction data ER - TY - JOUR T1 - Microbial EPS- and polysaccharide-catalyzed crystallization of dolomite and Ca-Mg-carbonates AN - 1656033675; 2015-015347 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Xu, Huifang AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2755 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - alkaline earth metals KW - magnesium KW - polysaccharides KW - solutes KW - adsorption KW - ions KW - order-disorder KW - dolomite KW - hydration KW - organic compounds KW - catalysis KW - precipitation KW - metals KW - bacteria KW - crystallization KW - carbohydrates KW - magnesian calcite KW - carbonates KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656033675?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Microbial+EPS-+and+polysaccharide-catalyzed+crystallization+of+dolomite+and+Ca-Mg-carbonates&rft.au=Xu%2C+Huifang%3BAnonymous&rft.aulast=Xu&rft.aufirst=Huifang&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2755&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 - adsorption; alkaline earth metals; bacteria; carbohydrates; carbonates; catalysis; crystallization; dolomite; hydration; ions; magnesian calcite; magnesium; metals; order-disorder; organic compounds; polysaccharides; precipitation; solutes ER - TY - JOUR T1 - Modeling the Terrestrial Biosphere AN - 1647024747; 21193967 AB - The land surface comprises the smallest areal fraction of the Earth system's major components (e.g., versus atmosphere or ocean with cryosphere). As such, how is it that some of the largest sources of uncertainty in future climate projections are found in the terrestrial biosphere? This uncertainty stems from how the terrestrial biosphere is modeled with respect to the myriad of biogeochemical, physical, and dynamic processes represented (or not) in numerous models that contribute to projections of Earth's future. Here, we provide an overview of the processes included in terrestrial biosphere models (TBMs), including various approaches to representing any one given process, as well as the processes that are missing and/or uncertain. We complement this with a comprehensive review of individual TBMs, marking the differences, uniqueness, and recent and planned developments. To conclude, we summarize the latest results in benchmarking activities, particularly as linked to recent model intercomparison projects, and outline a path forward to reducing uncertainty in the contribution of the terrestrial biosphere to global atmospheric change. JF - Annual Review of Environment and Resources AU - Fisher, Joshua B AU - Huntzinger, Deborah N AU - Schwalm, Christopher R AU - Sitch, Stephen AD - Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, jbfisher@jpl.nasa.gov PY - 2014 SP - 91 EP - 123 PB - Annual Reviews, Inc., 4139 El Camino Way Palo Alto CA 94303-0139 United States VL - 39 SN - 1543-5938, 1543-5938 KW - Environment Abstracts KW - biogeochemical KW - carbon KW - cycle KW - ecosystem KW - land surface KW - model KW - nutrients KW - plant KW - terrestrial biosphere KW - vegetation KW - water KW - Cryosphere KW - Biogeochemistry KW - Reviews KW - Oceans KW - Biosphere KW - Atmosphere KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1647024747?accountid=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=Annual+Review+of+Environment+and+Resources&rft.atitle=Modeling+the+Terrestrial+Biosphere&rft.au=Fisher%2C+Joshua+B%3BHuntzinger%2C+Deborah+N%3BSchwalm%2C+Christopher+R%3BSitch%2C+Stephen&rft.aulast=Fisher&rft.aufirst=Joshua&rft.date=2014-01-01&rft.volume=39&rft.issue=&rft.spage=91&rft.isbn=9780824323394&rft.btitle=&rft.title=Annual+Review+of+Environment+and+Resources&rft.issn=15435938&rft_id=info:doi/10.1146%2Fannurev-environ-012913-093456 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-01 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Cryosphere; Biogeochemistry; Oceans; Reviews; Biosphere; Atmosphere DO - http://dx.doi.org/10.1146/annurev-environ-012913-093456 ER - TY - JOUR T1 - Volcanism at Olympus Mons, Mars; results from geologic mapping AN - 1645573718; 2015-007203 AB - We have completed a NASA-funded project to map the morphology and structure of the Olympus Mons (OM) shield volcano on Mars, using ArcGIS (super TM) software by ESRI. This geologic map, to be published at a scale of 1:1,000,000, was made using Mars Reconnaissance Orbiter Context Camera (CTX) and Mars Express High Resolution Stereo Camera (HRSC) image mosaics as the mapping base. To address our science questions we also conducted mapping at the approximately 1:300,000 scale, which enables a distinction between sinuous rilles and leveed channels, which is fundamental for interpreting abundances among, and changes between, tube- and channel-forming eruptions. The scientific questions upon which this mapping project is based include understanding the volcanic development, including identification of volcanic unit source areas, and subsequent modification by structural, aeolian, and possibly glacial processes. We have combined our map with a map of the Olympus Mons Caldera that was produced at 1:200,000 scale, which provides additional detail on the summit region. We identified 27 units that are divided among Flank Units, Scarp and Apron Units, Plains Units, and Crater Materials. The Flank Units include 13 units, plus 7 caldera units. The basic morphological difference across the flank involves mottled and channeled units. The channel unit is typified by sub-parallel linear flows with levee structures. The mottled unit is hilly at the horizontal scale of 10s to 100s of meters. Because a motivating question involves the identification of flank unit sources we subdivided channels and mottled units according to their apparent origin. These include Fan-sourced, Ridge-sourced, and Flank units (which can be traced to the caldera or have a source that is unclear). Fans and ridges are up to 100 m in height. Fans are delta-shaped whereas ridges are elongate, generally radial to the caldera. The geologic contacts between morphologic units are now completely mapped. Small vent structures in the plains to the SE and lava fans on the volcano's flank have been cross referenced with the Catalog of Small Volcanic Vents in the Tharsis Province. The final map draft will be submitted to the USGS shortly for review upon completion of the Correlation of Map Units and Description of Map Units. JF - Abstracts with Programs - Geological Society of America AU - Williams, David A AU - Bleacher, Jacob E AU - Mouginis-Mark, Peter J AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 84 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645573718?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Volcanism+at+Olympus+Mons%2C+Mars%3B+results+from+geologic+mapping&rft.au=Williams%2C+David+A%3BBleacher%2C+Jacob+E%3BMouginis-Mark%2C+Peter+J%3BAnonymous&rft.aulast=Williams&rft.aufirst=David&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=84&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-01-15 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Silicic nonmare volcanism at the Moon's Compton-Belkovich volcanic complex AN - 1645573594; 2015-007198 AB - The Compton-Belkovich Volcanic Complex (CBVC), a 25X35 km feature located at 100 degrees E and 60 degrees N, has elevated topography, high reflectance, and high thorium and silica contents. Morphologies revealed by LRO's Narrow Angle Camera (NAC) include volcanic cones and small domes or bulges, and irregular depressions. The overall topographic feature is elevated, has a large, irregular central depression, and coincides with the area of high reflectance. Volcanic construction occurred along the eastern and western flanks of the structure, and a cumulo dome with a 7 km wide base, 2 km wide summit, 1 km height, and a summit crater, occurs in the northern part of the complex. CBVC topography consists of eroded volcanic features, small cones of one to several km bases, irregular depressions, and several degraded impact craters with approximately 0.5 to 1.5 km diameters. NAC-derived photometry indicates that areas within the CBVC are more reflective than surroundings by 15-30%. High-reflectance material extends 7-8 km E-SE, beyond the topographically elevated terrain, possibly a result of pyroclastic activity. The surroundings are feldspathic, similar to the Apollo 16 site. Areas within the CBVC have reflectance values that are as high or higher than other suspected silicic volcanic features such as the Gruithuisen Domes and Hansteen Alpha. Diviner data indicate that the CBVC has a silicic composition, thus we infer the mineralogy to be dominated by an SiO (sub 2) phase and K-feldspar, and/or Si-K-rich glass. Analysis of the crater size-frequency distributions of the CBVC using NAC and WAC data yield model ages for the CBVC, surrounding regions, and nearby large craters. The age of Compton Crater (160 km diameter) is well constrained to approximately 3.6 Ga and is stratigraphically older than the CBVC. The young bounding age constraint is the superposition of secondary impact craters from nearby Hayn (87 km diameter) or Belkovich-K (47 km diameter), both Copernican craters. Our preferred model age for volcanic activity at the CBVC is 3.4-3.5 Ga. M (super 3) spectra are interpreted to indicate that the CBVC surface may be enriched in endogenic OH, possibly associated with pyroclastics. We infer that the CBVC formed by extrusion of lava from a near-surface magma chamber coupled with local collapse, emplacement of late silicic segregations, and possibly silicic pyroclastics. JF - Abstracts with Programs - Geological Society of America AU - Jolliff, Bradley L AU - Clegg, Ryan N AU - Shirley, Katherine A AU - Zanetti, Michael AU - Hiesinger, Harald AU - Van der Bogert, Carolyn H AU - Lawrence, Samuel J AU - Petro, Noah E AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 83 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645573594?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Silicic+nonmare+volcanism+at+the+Moon%27s+Compton-Belkovich+volcanic+complex&rft.au=Jolliff%2C+Bradley+L%3BClegg%2C+Ryan+N%3BShirley%2C+Katherine+A%3BZanetti%2C+Michael%3BHiesinger%2C+Harald%3BVan+der+Bogert%2C+Carolyn+H%3BLawrence%2C+Samuel+J%3BPetro%2C+Noah+E%3BAnonymous&rft.aulast=Jolliff&rft.aufirst=Bradley&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=83&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-01-15 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Tomographic reconstruction of a sequence of eruptive events in Elysium Planitia, Mars AN - 1641011600; 2015-002261 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Morgan, G A AU - Campbell, B A AU - Carter, L M AU - Plaut, J J AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2377 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - lava flows KW - three-dimensional models KW - SHARAD KW - radar methods KW - Mars Reconnaissance Orbiter KW - Mars KW - terrestrial planets KW - visualization KW - planets KW - Amazonian KW - volcanism KW - eruptions KW - Elysium KW - volume KW - MOLA KW - basaltic composition KW - buried features KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011600?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Tomographic+reconstruction+of+a+sequence+of+eruptive+events+in+Elysium+Planitia%2C+Mars&rft.au=Morgan%2C+G+A%3BCampbell%2C+B+A%3BCarter%2C+L+M%3BPlaut%2C+J+J%3BAnonymous&rft.aulast=Morgan&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/2377.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 May 29, 2014 N1 - Last updated - 2015-04-16 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Amazonian; basaltic composition; buried features; Elysium; eruptions; lava flows; Mars; Mars Reconnaissance Orbiter; MOLA; planets; radar methods; SHARAD; terrestrial planets; three-dimensional models; visualization; volcanism; volume ER - TY - JOUR T1 - Distribution of amino acids in lunar regolith AN - 1641011465; 2015-002315 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Elsila, Jamie E AU - Callahan, M P AU - Glavin, Daniel P AU - Dworkin, J P AU - Noble, S K AU - Gibson, E K, Jr AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1127 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - experimental studies KW - maturity KW - Moon KW - solar wind KW - kyanite KW - hydrolysis KW - distribution KW - nesosilicates KW - laboratory studies KW - curation KW - organic compounds KW - organic acids KW - lunar samples KW - detection KW - amino acids KW - orthosilicates KW - hydrogen cyanide KW - regolith KW - lunar soils KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011465?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Distribution+of+amino+acids+in+lunar+regolith&rft.au=Elsila%2C+Jamie+E%3BCallahan%2C+M+P%3BGlavin%2C+Daniel+P%3BDworkin%2C+J+P%3BNoble%2C+S+K%3BGibson%2C+E+K%2C+Jr%3BAnonymous&rft.aulast=Elsila&rft.aufirst=Jamie&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/1127.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 12 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on June 3, 2014 N1 - Last updated - 2014-12-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - amino acids; curation; detection; distribution; experimental studies; hydrogen cyanide; hydrolysis; kyanite; laboratory studies; lunar samples; lunar soils; maturity; Moon; nesosilicates; organic acids; organic compounds; orthosilicates; regolith; silicates; solar wind ER - TY - JOUR T1 - Transformations and fates of lipid biomarkers in microbial mat ecosystems AN - 1637543415; 2014-101765 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Jahnke, Linda L AU - Lee, C AU - Parenteau, M N AU - Carlson, M AU - Kudo, M D AU - Love, G D AU - Des Marais, D J AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1112 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - steranes KW - silicification KW - lipids KW - hopanoids KW - ecosystems KW - steroids KW - sedimentary rocks KW - pyrolysis KW - alcohols KW - triterpanes KW - sedimentary structures KW - processes KW - cyanobacteria KW - chemically precipitated rocks KW - Precambrian KW - biogenic structures KW - biochemistry KW - sterols KW - evaporites KW - biomarkers KW - stromatolites KW - organic compounds KW - diagenesis KW - paleobiology KW - hydrocarbons KW - hopanic acid KW - hopanes KW - aromatic hydrocarbons KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637543415?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Transformations+and+fates+of+lipid+biomarkers+in+microbial+mat+ecosystems&rft.au=Jahnke%2C+Linda+L%3BLee%2C+C%3BParenteau%2C+M+N%3BCarlson%2C+M%3BKudo%2C+M+D%3BLove%2C+G+D%3BDes+Marais%2C+D+J%3BAnonymous&rft.aulast=Jahnke&rft.aufirst=Linda&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1112&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 - alcohols; aromatic hydrocarbons; biochemistry; biogenic structures; biomarkers; chemically precipitated rocks; cyanobacteria; diagenesis; ecosystems; evaporites; hopanes; hopanic acid; hopanoids; hydrocarbons; lipids; organic compounds; paleobiology; Precambrian; processes; pyrolysis; sedimentary rocks; sedimentary structures; silicification; steranes; steroids; sterols; stromatolites; triterpanes ER - TY - JOUR T1 - Vaporization studies of olivine via Knudsen effusion mass spectrometry AN - 1637543214; 2014-101761 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Jacobson, Nathan S AU - Costa, Gustavo C C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1108 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - silicates KW - processes KW - experimental studies KW - condensation KW - mass spectra KW - olivine group KW - cosmochemistry KW - vaporization KW - forsterite KW - nesosilicates KW - olivine KW - orthosilicates KW - spectra KW - geochemistry KW - instruments KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637543214?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Vaporization+studies+of+olivine+via+Knudsen+effusion+mass+spectrometry&rft.au=Jacobson%2C+Nathan+S%3BCosta%2C+Gustavo+C+C%3BAnonymous&rft.aulast=Jacobson&rft.aufirst=Nathan&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1108&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 - Number of references - 5 N1 - Last updated - 2014-12-18 N1 - SubjectsTermNotLitGenreText - condensation; cosmochemistry; experimental studies; forsterite; geochemistry; instruments; mass spectra; nesosilicates; olivine; olivine group; orthosilicates; processes; silicates; spectra; vaporization ER - TY - JOUR T1 - Impacts on the Hubble Space Telescope Wide Field and Planetary Camera 2; experimental simulation of micrometeoroid capture AN - 1637542822; 2014-101617 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Price, M C AU - Kearsley, A T AU - Wozniakiewicz, P J AU - Spratt, J AU - Burchell, M J AU - Cole, M J AU - Anz-Meador, P AU - Liou, J C AU - Ross, D K AU - Opiela, J AU - Grime, G W AU - Colaux, J L AU - Palitsin, V V AU - Jeynes, C AU - Webb, R P AU - Griffin, T AU - Gerlach, L AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1466 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - impact features KW - olivine group KW - meteoroids KW - simulation KW - meteorites KW - hypervelocity impacts KW - spacecraft KW - olivine KW - orthosilicates KW - alloys KW - spectra KW - pyrrhotite KW - experimental studies KW - Wide Field and Planetary Camera 2 KW - paint KW - impacts KW - X-ray spectra KW - EDS spectra KW - nesosilicates KW - micrometeorites KW - micrometeoroids KW - Hubble Space Telescope KW - sulfides KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542822?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Impacts+on+the+Hubble+Space+Telescope+Wide+Field+and+Planetary+Camera+2%3B+experimental+simulation+of+micrometeoroid+capture&rft.au=Price%2C+M+C%3BKearsley%2C+A+T%3BWozniakiewicz%2C+P+J%3BSpratt%2C+J%3BBurchell%2C+M+J%3BCole%2C+M+J%3BAnz-Meador%2C+P%3BLiou%2C+J+C%3BRoss%2C+D+K%3BOpiela%2C+J%3BGrime%2C+G+W%3BColaux%2C+J+L%3BPalitsin%2C+V+V%3BJeynes%2C+C%3BWebb%2C+R+P%3BGriffin%2C+T%3BGerlach%2C+L%3BAnonymous&rft.aulast=Price&rft.aufirst=M&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2014/pdf/1466.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 - 5 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 - alloys; EDS spectra; experimental studies; Hubble Space Telescope; hypervelocity impacts; impact features; impacts; meteorites; meteoroids; micrometeorites; micrometeoroids; nesosilicates; olivine; olivine group; orthosilicates; paint; pyrrhotite; silicates; simulation; spacecraft; spectra; sulfides; Wide Field and Planetary Camera 2; X-ray spectra ER - TY - JOUR T1 - Cracks in inflation features of the McCartys lava flow, Zuni-Bandera volcanic field, New Mexico, and potential applications to the Elysium volcanic province, Mars AN - 1637542606; 2014-104935 AB - Substantial series of cracks are observed in the Lava Falls area on the southern edge of the McCartys Lava flow, part of the Zuni-Bandera Volcanic field in New Mexico. The topographic features of Lava Falls displaying the crack series, specifically monoclines, plateaus, and depressions, are interpreted as being formed by inflation of pahoehoe flows, as evidenced by uniformity in height, squeeze-out blades, large en echelon cracks at the flow margins, and monoclinal tilting. Crack types fall into three approximate categories: 1) planar, with one main horizontal fracture near the top, hinge-like, 2) concave with concentric, similar-sized fractures, and 3) convex, polygonal plates, fractures in all directions. Field observations of cracks suggests a dominance of a particular category for specific topographic features of the flow. Plateau edges and monoclines are dominated by type 1 cracks, specifically horizontal fractures resembling hinges, while depressions exhibit type 2 cracks that are concentric. Numerous transects of the area were taken using a differential GPS unit linked to field measurements of crack widths and depths. Early interpretations of the data suggest the current categorization of cracks is acceptable and possible relationships between crack depths and widths and their locations on the flow. Depending on the success of this interpretation, application to suspected inflation features within the Elysium Volcanic Province of Mars is desired. JF - Abstracts with Programs - Geological Society of America AU - Wise, Charles AU - de Wet, Andrew P AU - Hamilton, Christopher W AU - Garry, W Brent AU - McHale, Jessica C AU - Konkol, Susan AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 68 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 2 SN - 0016-7592, 0016-7592 KW - 23:Geomorphology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542606?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Cracks+in+inflation+features+of+the+McCartys+lava+flow%2C+Zuni-Bandera+volcanic+field%2C+New+Mexico%2C+and+potential+applications+to+the+Elysium+volcanic+province%2C+Mars&rft.au=Wise%2C+Charles%3Bde+Wet%2C+Andrew+P%3BHamilton%2C+Christopher+W%3BGarry%2C+W+Brent%3BMcHale%2C+Jessica+C%3BKonkol%2C+Susan%3BAnonymous&rft.aulast=Wise&rft.aufirst=Charles&rft.date=2014-01-01&rft.volume=46&rft.issue=2&rft.spage=68&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2014NE/webprogram/Paper236586.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 49th annual meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-12-18 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Inflation features associated with the McCartys lava flow, ZBVF, NM AN - 1637542592; 2014-104934 AB - Detailed mapping of the Lava Falls area of the 3900 year old McCartys Lava flow, part of the Zuni-Bandera volcanic field in New Mexico, reveals a complex emplacement history. The southern part of the flow is dominated by pahoehoe flows with features that have been interpreted as formed by lava inflation processes (Mabery et al. 1999). A series of at least 4 plateaus, are separated by steep escarpments with numerous deep cracks formed as lava injection inflated the flow from below. The plateaus also include numerous circular and elongate depressions , with approximately concentric crack patterns surrounding pits between 5 and 15 m deep. These pits are interpreted to be inflation features formed above topographic highs as the surrounding lava preferentially thickened by inflation. Crack depths suggest a minimum of several months for the emplacement of the flow, but depending on the whether the whole flow was one more or less continuous flow or a series of discreet pulses or eruptive phases, the actual duration of the emplacement may have been much longer. This raises an important issue regarding the origin of terracing within pahoehoe flow fields. Are the plateaus, the result of successive flows stacking on top of one another in a "layer cake" fashion? Are they the result of a single sheet-like lobe with differential inflation occurring due to the development of preferred lava emplacement? Or is the construction process more complicated, with initial lobes helping to confine subsequent flows that in turn invert the topography through inflation and create new barriers for later flows? Mapping of flow units exposed in the Lava Falls area provides evidence in support of the latter scenario, with at least 10 phases of lava emplacement that can be distinguished on the basis of cross-cutting relationships, crack patterns, and surface textures. The later phases of lava emplacement produced small flows and lobes that originated from different levels within the extensive plateaus implying a complex emplacement and cooling history of the overall flow. This implies that partial burial of plateaus margins by younger breakouts may obscure the true thickness of the each plateau and that the overall duration of emplacement was much longer than the crack depths at any one location would suggest. JF - Abstracts with Programs - Geological Society of America AU - de Wet, Andrew P AU - Bleacher, Jacob E AU - Hamilton, Christopher W AU - Garry, W Brent AU - McHale, Jessica C AU - Wise, Charles AU - Switzer, Megan AU - Konkol, Susan AU - von Meerscheidt, Hester AU - Samuels, Ryan C AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 68 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 2 SN - 0016-7592, 0016-7592 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542592?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Inflation+features+associated+with+the+McCartys+lava+flow%2C+ZBVF%2C+NM&rft.au=de+Wet%2C+Andrew+P%3BBleacher%2C+Jacob+E%3BHamilton%2C+Christopher+W%3BGarry%2C+W+Brent%3BMcHale%2C+Jessica+C%3BWise%2C+Charles%3BSwitzer%2C+Megan%3BKonkol%2C+Susan%3Bvon+Meerscheidt%2C+Hester%3BSamuels%2C+Ryan+C%3BAnonymous&rft.aulast=de+Wet&rft.aufirst=Andrew&rft.date=2014-01-01&rft.volume=46&rft.issue=2&rft.spage=68&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2014NE/webprogram/Paper236286.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 49th annual meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-12-18 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Basalt plateau escarpment crack patterns-field, GIS and analog modeling of the McCartys Flow and implications for Mars AN - 1637542246; 2014-104933 AB - Fluvial and volcanic features on Mars are often difficult to distinguish just based on morphological observations. A better understanding of the possible processes that form features such as cracks that are associated with undifferentiated flows on Mars might be helpful in determining the geological processes involved. The study of Earth analogs is one approach to better understand these features. The 3900 year old McCartys basalt is the youngest flow in the late Cenozoic Zuni-Bandera volcanic field in New Mexico (Dunbar & Phillips, 2004). The southern part of the flow includes numerous extensive plateaus with pits and surrounded by escarpments and mounds. Cracks are widely distributed, but are particularly prevalent where slope changes occur. Previous workers have attributed many of these features to the process of inflation, or the rising of an already solidified basaltic crust due to further magma injection from below (Mabery et al., 1999). The goal of this study is to quantify these features within the context of the inflation model through detailed field observations, GIS mapping, and physical modeling. We distinguished three types of inflation crack patterns based on shape, crack density and crack size, that are consistent over all of the McCartys' escarpments. Physical modeling using polyethylene glycol 600 complimented the field observations and remote sensing and explored the inflation model by examining the formation of cracks through the lava inflation process. This study enhances our understanding of crack formation by lava inflation and may aid in the identification of lava flow processes on Mars. JF - Abstracts with Programs - Geological Society of America AU - McHale, Jessica C AU - Bleacher, Jacob E AU - Dewet, Andrew P AU - Garry, W Brent AU - Hamilton, Christopher W AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 68 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 2 SN - 0016-7592, 0016-7592 KW - 23:Geomorphology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542246?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Basalt+plateau+escarpment+crack+patterns-field%2C+GIS+and+analog+modeling+of+the+McCartys+Flow+and+implications+for+Mars&rft.au=McHale%2C+Jessica+C%3BBleacher%2C+Jacob+E%3BDewet%2C+Andrew+P%3BGarry%2C+W+Brent%3BHamilton%2C+Christopher+W%3BAnonymous&rft.aulast=McHale&rft.aufirst=Jessica&rft.date=2014-01-01&rft.volume=46&rft.issue=2&rft.spage=68&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2014NE/webprogram/Paper236308.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 49th annual meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-12-18 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - The slow decay of aftershocks triggered by the August 2011, Mineral, Virginia earthquake AN - 1637535444; 2014-105043 AB - On August 23, 2011, a M (sub w) 5.8 earthquake, one of the larger earthquakes in the eastern U.S. in over a century, struck near the town of Mineral, Virginia. A multi-institution deployment of seismometers in the epicentral region of the Mineral earthquake yielded the best recorded aftershock sequence in the eastern U.S. and has offered a rare opportunity to study the decay of aftershocks in an intraplate setting. The Mineral earthquake was a reverse faulting event, and comparison with two reverse faulting earthquakes in California (the 1985 M (sub w) 6.1 Kettleman Hills and 1987 M (sub w) 5.9 Whittier Narrows earthquakes) has revealed variations in the rate and duration of aftershock sequences. The rate in the California aftershock sequences decreased to two or fewer events per day 20 days after the mainshock. Aftershocks of the Mineral earthquake decreased in a power law decay fashion for the first 10 days after the mainshock, but then increased to more than two events per day at about approximately 25 and 100 days after the mainshock. Each catalog was constrained using a M (sub c) = 2.2 and to events located <15 km from the mainshock. Modified Omori's law curves fit to each sequence yielded a low p-value of 0.76 for the Mineral earthquake compared to p-values of 1.13 and 1.25 for the Kettleman Hills and Whittier Narrows earthquakes (respectively), indicating a significantly slower decay of aftershocks from the Mineral earthquake. This slow decay rate can be attributed in part to the delayed occurrence of earthquakes along the aftershock-delineated Fredericks Hall ( approximately 25 days after the mainshock) and late northwest ( approximately 100 days after the mainshock) faults. Structural heterogeneities, stress, and temperature in the crust are all cited as factors responsible for causing variations in p-value. The crust in the eastern U.S. is older and colder than in many tectonically active regions. These characteristics could explain its prolonged aftershock decay rate. The slow decay of aftershocks from the Mineral earthquake may also support the hypothesis that aftershock duration is inversely proportional to fault stress rate, according to which aftershocks in active tectonic margins may last only a few years whereas aftershocks in intraplate regions may endure much longer. JF - Abstracts with Programs - Geological Society of America AU - Walsh, Lisa Schleicher AU - Sauber, Jeanne M AU - Martin, Aaron J AU - Montesi, Laurent G AU - McNamara, Daniel E AU - Horton, J Wright, Jr AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 33 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 3 SN - 0016-7592, 0016-7592 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637535444?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+slow+decay+of+aftershocks+triggered+by+the+August+2011%2C+Mineral%2C+Virginia+earthquake&rft.au=Walsh%2C+Lisa+Schleicher%3BSauber%2C+Jeanne+M%3BMartin%2C+Aaron+J%3BMontesi%2C+Laurent+G%3BMcNamara%2C+Daniel+E%3BHorton%2C+J+Wright%2C+Jr%3BAnonymous&rft.aulast=Walsh&rft.aufirst=Lisa&rft.date=2014-01-01&rft.volume=46&rft.issue=3&rft.spage=33&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Southeastern Section, 63rd 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 - 2014-12-18 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Future Antarctic bed topography and its implications for ice sheet dynamics AN - 1629943950; 2014-093760 AB - The Antarctic bedrock is evolving as the solid Earth responds to the past and ongoing evolution of the ice sheet. A recently improved ice loading history suggests that the Antarctic Ice Sheet (AIS) has generally been losing its mass since the Last Glacial Maximum. In a sustained warming climate, the AIS is predicted to retreat at a greater pace, primarily via melting beneath the ice shelves. We employ the glacial isostatic adjustment (GIA) capability of the Ice Sheet System Model (ISSM) to combine these past and future ice loadings and provide the new solid Earth computations for the AIS. We find that past loading is relatively less important than future loading for the evolution of the future bed topography. Our computations predict that the West Antarctic Ice Sheet (WAIS) may uplift by a few meters and a few tens of meters at years AD 2100 and 2500, respectively, and that the East Antarctic Ice Sheet is likely to remain unchanged or subside minimally except around the Amery Ice Shelf. The Amundsen Sea Sector in particular is predicted to rise at the greatest rate; one hundred years of ice evolution in this region, for example, predicts that the coastline of Pine Island Bay will approach roughly 45 mm yr (super -1) in viscoelastic vertical motion. Of particular importance, we systematically demonstrate that the effect of a pervasive and large GIA uplift in the WAIS is generally associated with the flattening of reverse bed slope, reduction of local sea depth, and thus the extension of grounding line (GL) towards the continental shelf. Using the 3-D higher-order ice flow capability of ISSM, such a migration of GL is shown to inhibit the ice flow. This negative feedback between the ice sheet and the solid Earth may promote stability in marine portions of the ice sheet in the future. JF - Solid Earth (SE, Gottingen) AU - Adhikari, S AU - Ivins, E R AU - Larour, E AU - Seroussi, H AU - Morlighem, M AU - Nowicki, S Y1 - 2014 PY - 2014 DA - 2014 SP - 569 EP - 584 PB - Copernicus Publications, Gottingen VL - 5 IS - 1 SN - 1869-9510, 1869-9510 KW - bedrock KW - last glacial maximum KW - Quaternary KW - loading KW - Amery Ice Shelf KW - ice shelves KW - glaciomarine environment KW - Holocene KW - ice sheets KW - deglaciation KW - feedback KW - Cenozoic KW - Antarctic ice sheet KW - topography KW - Antarctica KW - marine environment KW - glacial environment KW - glacial geology KW - Amundsen Sea KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943950?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Solid+Earth+%28SE%2C+Gottingen%29&rft.atitle=Future+Antarctic+bed+topography+and+its+implications+for+ice+sheet+dynamics&rft.au=Adhikari%2C+S%3BIvins%2C+E+R%3BLarour%2C+E%3BSeroussi%2C+H%3BMorlighem%2C+M%3BNowicki%2C+S&rft.aulast=Adhikari&rft.aufirst=S&rft.date=2014-01-01&rft.volume=5&rft.issue=1&rft.spage=569&rft.isbn=&rft.btitle=&rft.title=Solid+Earth+%28SE%2C+Gottingen%29&rft.issn=18699510&rft_id=info:doi/10.5194%2Fse-5-569-2014 L2 - http://www.solid-earth.net/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 61 N1 - Document feature - illus. incl. sects. N1 - Last updated - 2014-12-04 N1 - SubjectsTermNotLitGenreText - Amery Ice Shelf; Amundsen Sea; Antarctic ice sheet; Antarctica; bedrock; Cenozoic; deglaciation; feedback; glacial environment; glacial geology; glaciomarine environment; Holocene; ice sheets; ice shelves; last glacial maximum; loading; marine environment; Quaternary; topography DO - http://dx.doi.org/10.5194/se-5-569-2014 ER - TY - JOUR T1 - Initial (super 87) Sr/ (super 86) Sr ratios of 3.2 Ga barite reveal input of Sr derived from weathering of Archean crust AN - 1629943881; 2014-094031 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Satkoski, Aaron M AU - Beard, Brian L AU - Coleman, Max L AU - Johnson, Clark M AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2189 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - alkaline earth metals KW - sea water KW - Precambrian KW - sulfates KW - isotopes KW - isotope ratios KW - Barite Valley KW - continental crust KW - weathering KW - stable isotopes KW - Rb/Sr KW - Sr-87/Sr-86 KW - Fig Tree Group KW - metals KW - diagenesis KW - Southern Africa KW - Africa KW - Archean KW - South Africa KW - barite KW - Barberton greenstone belt KW - strontium KW - crust KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943881?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Initial+%28super+87%29+Sr%2F+%28super+86%29+Sr+ratios+of+3.2+Ga+barite+reveal+input+of+Sr+derived+from+weathering+of+Archean+crust&rft.au=Satkoski%2C+Aaron+M%3BBeard%2C+Brian+L%3BColeman%2C+Max+L%3BJohnson%2C+Clark+M%3BAnonymous&rft.aulast=Satkoski&rft.aufirst=Aaron&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2189&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 3 N1 - Last updated - 2014-12-04 N1 - SubjectsTermNotLitGenreText - Africa; alkaline earth metals; Archean; Barberton greenstone belt; barite; Barite Valley; continental crust; crust; diagenesis; Fig Tree Group; isotope ratios; isotopes; metals; Precambrian; Rb/Sr; sea water; South Africa; Southern Africa; Sr-87/Sr-86; stable isotopes; strontium; sulfates; weathering ER - TY - JOUR T1 - Very efficient high-order hyperbolic schemes for time-dependent advection-diffusion problems: Third-, fourth-, and sixth-order AN - 1629358929; 20876199 AB - In this paper, we construct very efficient high-order schemes for general time-dependent advection-diffusion problems, based on the first-order hyperbolic system method. Extending the previous work on the second-order time-dependent hyperbolic advection-diffusion scheme (Mazaheri and Nishikawa, NASA/TM-2014-218175, 2014), we construct third-, fourth-, and sixth-order accurate schemes by modifying the source term discretization. In this paper, two techniques for the source term discretization are proposed; (1) reformulation of the source terms with their divergence forms and (2) correction to the trapezoidal rule for the source term discretization. We construct spatially third- and fourth-order schemes from the former technique. These schemes require computations of the gradients and second-derivatives of the source terms. From the latter technique, we construct spatially third-, fourth-, and sixth-order schemes by using the gradients and second-derivatives for the source terms, except the fourth-order scheme, which does not require the second derivatives of the source term and thus is even less computationally expensive than the third-order schemes. We then construct high-order time-accurate schemes by incorporating a high-order backward difference formula as a source term. These schemes are very efficient in that high-order accuracy is achieved for both the solution and the gradient only by the improved source term discretization. A very rapid Newton-type convergence is achieved by a compact second-order Jacobian formulation. The numerical results are presented for both steady and time-dependent linear and nonlinear advection-diffusion problems, demonstrating these powerful features. JF - Computers & Fluids AU - Mazaheri, Alireza AU - Nishikawa, Hiroaki AD - NASA Langley Research Center, Hampton, VA 23681, USA, ali.r.mazaheri@nasa.gov Y1 - 2014///0, PY - 2014 DA - 0, 2014 SP - 131 EP - 147 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 102 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Higher-order KW - Residual distribution KW - Unsteady KW - Nonlinear KW - Navier-Stokes KW - Computers KW - Fluids KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629358929?accountid=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=Very+efficient+high-order+hyperbolic+schemes+for+time-dependent+advection-diffusion+problems%3A+Third-%2C+fourth-%2C+and+sixth-order&rft.au=Mazaheri%2C+Alireza%3BNishikawa%2C+Hiroaki&rft.aulast=Mazaheri&rft.aufirst=Alireza&rft.date=2014-01-01&rft.volume=102&rft.issue=&rft.spage=131&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/10.1016%2Fj.compfluid.2014.06.020 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Fluids; Computers DO - http://dx.doi.org/10.1016/j.compfluid.2014.06.020 ER - TY - JOUR T1 - Morphologic characteristics of pebble and cobble-sized clasts along the Curiosity Rover traverse AN - 1623260595; 2014-089466 AB - Clast characteristics record primary and secondary processes as a function of time, distance, or both. Documenting variation in clast characteristics from location to location is fundamental to defining the effects of clast transport, and to deconvolving the effects of clast emplacement from those of secondary modification. Regular measurements with consistent, well-modeled parameters are required to document the changes along the rover traverse. Utilizing an imaging campaign designed to systematically examine clast characteristics as they varied along a traverse, we have assessed the characteristics of clasts along Curiosity's traverse to shed light on the processes important in the genesis, modification and transportation of surface materials. Each Mastcam clast survey image pair was used to determine the range and distribution of clast sizes. These data were then used to calculate the degree of sorting. We also estimated clast size, shape (sphericity, or how closely a clast profile resembles a sphere), roundness (a measure of corner sharpness), and texture (qualitative variation from a flat surface at scales smaller than the corners). Elements of texture also include the size, morphology and dispersion of grains within an individual clast, where the term "grain" is limited to features observed within clasts. Pebble- to cobble-sized clasts at Bradbury Landing, and subsequently along Curiosity's traverse to Yellowknife Bay, reflect a mixing of two endmember transport mechanisms. The general clast population likely represents material deposited via impact processes, including meteorite fragments, ejecta from distant craters, and impactites consisting of shocked and shock melted materials from within Gale Crater, which resulted predominantly in larger, angular clasts. A subset of rounded pebble-sized clasts has likely been modified by intermittent alluvial or fluvial processes. The morphology of this rounded clast population indicates that water was a more important transporting agent here than at other Mars sites that have been studied in situ. Finally, we identified populations of basalt clasts and porphyritic clasts of undetermined composition by their morphologic and textural characteristics; basalts are confirmed by geochemical data provided by ChemCam. JF - Abstracts with Programs - Geological Society of America AU - Yingst, R Aileen AU - Garvin, James AU - Hamilton, Victoria E AU - Jensen, J K AU - Kah, Linda C AU - Meslin, P Y AU - Palucis, Marisa C AU - Pilleri, A AU - Williams, Rebecca M E AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 40 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 2 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623260595?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Morphologic+characteristics+of+pebble+and+cobble-sized+clasts+along+the+Curiosity+Rover+traverse&rft.au=Yingst%2C+R+Aileen%3BGarvin%2C+James%3BHamilton%2C+Victoria+E%3BJensen%2C+J+K%3BKah%2C+Linda+C%3BMeslin%2C+P+Y%3BPalucis%2C+Marisa+C%3BPilleri%2C+A%3BWilliams%2C+Rebecca+M+E%3BAnonymous&rft.aulast=Yingst&rft.aufirst=R&rft.date=2014-01-01&rft.volume=46&rft.issue=2&rft.spage=40&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2014NE/webprogram/Paper236201.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 49th annual meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-11-13 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Supervolcanoes in the Arabia Terra region of Mars and their relationship to layered sedimentary units AN - 1623259530; 2014-089471 AB - Several large (10s km in diameter) and irregularly shaped depressions within Arabia Terra, Mars represent an explosive type of highland volcanic construct. As a group these volcanoes constitute a previously unrecognized martian volcanic province. These low-relief volcanoes, or paterae, display a range of geomorphic features related to structural collapse, effusive volcanism, and explosive eruptions. Extruded lavas contributed to the formation of enigmatic highland ridged plains in Arabia Terra. Outgassed sulfur and erupted fine-grained pyroclastics from these calderas likely fed the formation of currently altered, layered sedimentary rocks and fretted terrain found throughout the equatorial region of Mars. Discovery of a new type of volcanic construct in the Arabia volcanic province fundamentally changes the picture of ancient volcanism and climate evolution on Mars. Other eroded topographic basins in the ancient Martian highlands that have been dismissed as degraded impact craters should be reconsidered as possible volcanic constructs formed in an early phase of widespread, disseminated magmatism on Mars. JF - Abstracts with Programs - Geological Society of America AU - Bleacher, Jacob E AU - Michalski, Joseph AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 41 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 2 SN - 0016-7592, 0016-7592 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623259530?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Supervolcanoes+in+the+Arabia+Terra+region+of+Mars+and+their+relationship+to+layered+sedimentary+units&rft.au=Bleacher%2C+Jacob+E%3BMichalski%2C+Joseph%3BAnonymous&rft.aulast=Bleacher&rft.aufirst=Jacob&rft.date=2014-01-01&rft.volume=46&rft.issue=2&rft.spage=41&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2014NE/webprogram/Paper236345.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 49th annual meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-11-13 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Channel and tube flow features associated with the Twin Craters lava flow, Zuni-Bandera volcanic field, NM; insights into similar features on Mars AN - 1623256824; 2014-089472 AB - In this study, we combined detailed field observations and mapping with remote sensing to better understand variations in morphology along the channel system of the 18,000 year old Twin Craters Lava Flow (part of the Zuni-Bandera Volcanic Field, NM). The Twin Craters flow is an aa and tube-fed pahoehoe flow with braided or branching tubes and channels; and associated aa and pahoehoe break-outs. Extensive shatter features occur along the channel system. It is likely that the variations in morphology along the channel are related to variations in the pre-flow valley morphology including valley width and slope changes, and interactions with several ridges of bedrock outcropping within the valley. Deeper and bifurcating channels are related to steeper slopes while shatter features occur where slopes are more gentle. Over-pressurization of the tube resulting in shatter features might be related to changes in local discharge rate associated with the ponding and release of lava within the channel system that may be due to interactions between the lava and obstacles along the flow's path. Many of these features are similar to features present in the Tharsis Montes region of Mars and particularly on the southern apron of Ascraeus Mons. The detailed description of the morphology of the Twin Craters Lava Flow and the understanding of the emplacement mechanisms will be crucial in identifying the processes that formed the Ascraeus flows and channels. JF - Abstracts with Programs - Geological Society of America AU - Samuels, Ryan C AU - Dewet, Andrew P AU - Bleacher, Jacob E AU - Hamilton, Christopher W AU - Garry, W Brent AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 41 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 2 SN - 0016-7592, 0016-7592 KW - 23:Geomorphology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256824?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Channel+and+tube+flow+features+associated+with+the+Twin+Craters+lava+flow%2C+Zuni-Bandera+volcanic+field%2C+NM%3B+insights+into+similar+features+on+Mars&rft.au=Samuels%2C+Ryan+C%3BDewet%2C+Andrew+P%3BBleacher%2C+Jacob+E%3BHamilton%2C+Christopher+W%3BGarry%2C+W+Brent%3BAnonymous&rft.aulast=Samuels&rft.aufirst=Ryan&rft.date=2014-01-01&rft.volume=46&rft.issue=2&rft.spage=41&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2014NE/webprogram/Paper236188.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Northeastern Section, 49th annual meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-11-13 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Economic and Ecological Crisis in Greece: The Global Context and Syriza's Solution AN - 1622293352; 201423773 AB - Many misconceptions still exist in the mainstream about the ongoing economic crisis in Southern Europe. First, the crisis is often considered a direct result of the 2008 banking sector collapse in the United States, but it is becoming abundantly clear that it is a by-product, an expected outcome, of the current economic system, capitalism, which relies on continuing growth and competition, profit maximization, power and wealth accumulation by the oligarchy, commodification of public goods and resources, and the voracious exploitation of the environment. ln the late 2000s the system reached a serious downturn, a situation that persists in Southern Europe in particular. A second misconception has to do with the impact ofthe crisis on our societies. Discourse and response typically focus on the economic impacts alone, where the most immediate emergency is created by rising unemployment, severe wage cuts, and deteriorating conditions and benefits for the working class. Adapted from the source document. JF - New Politics AU - Romanou, Natassa AD - NASA-Goddard Institute for Space Studies at Columbia University Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 37 EP - 40 PB - New Politics Associates, New York NY VL - 24 IS - 4 SN - 0028-6494, 0028-6494 KW - Profits KW - Emergencies KW - Europe KW - Exploitation KW - Economic Crises KW - Banking KW - Working Class KW - Accumulation KW - Commodification KW - article KW - 9003: history and theory; political theories and philosophy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622293352?accountid=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=New+Politics&rft.atitle=Economic+and+Ecological+Crisis+in+Greece%3A+The+Global+Context+and+Syriza%27s+Solution&rft.au=Romanou%2C+Natassa&rft.aulast=Romanou&rft.aufirst=Natassa&rft.date=2014-01-01&rft.volume=24&rft.issue=4&rft.spage=37&rft.isbn=&rft.btitle=&rft.title=New+Politics&rft.issn=00286494&rft_id=info:doi/ LA - English DB - Worldwide Political Science Abstracts N1 - Date revised - 2014-11-01 N1 - Last updated - 2016-09-28 N1 - CODEN - NEPOEM N1 - SubjectsTermNotLitGenreText - Europe; Accumulation; Emergencies; Economic Crises; Profits; Banking; Working Class; Commodification; Exploitation ER - TY - JOUR T1 - High-order methods for computational fluid dynamics: A brief review of compact differential formulations on unstructured grids AN - 1567104790; 20556695 AB - Popular high-order schemes with compact stencils for Computational Fluid Dynamics (CFD) include Discontinuous Galerkin (DG), Spectral Difference (SD), and Spectral Volume (SV) methods. The recently proposed Flux Reconstruction (FR) approach or Correction Procedure using Reconstruction (CPR) is based on a differential formulation and provides a unifying framework for these high-order schemes. Here we present a brief review of recent progress in FR/CPR research as well as some pacing items and future challenges. JF - Computers & Fluids AU - Huynh, H T AU - Wang, Z J AU - Vincent, P E AD - NASA Glenn Research Center, Cleveland, OH 44135, USA, huynh@grc.nasa.gov Y1 - 2014///0, PY - 2014 DA - 0, 2014 SP - 209 EP - 220 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 98 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Discontinuous Galerkin KW - High-order methods KW - Conservation laws KW - Flux Reconstruction KW - Correction procedure using reconstruction KW - Hydrodynamics KW - Reviews KW - Computers KW - Fluid dynamics KW - Fluctuations KW - Methodology KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567104790?accountid=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+methods+for+computational+fluid+dynamics%3A+A+brief+review+of+compact+differential+formulations+on+unstructured+grids&rft.au=Huynh%2C+H+T%3BWang%2C+Z+J%3BVincent%2C+P+E&rft.aulast=Huynh&rft.aufirst=H&rft.date=2014-01-01&rft.volume=98&rft.issue=&rft.spage=209&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/10.1016%2Fj.compfluid.2013.12.007 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Fluid dynamics; Methodology; Hydrodynamics; Computers; Reviews; Fluctuations DO - http://dx.doi.org/10.1016/j.compfluid.2013.12.007 ER - TY - JOUR T1 - Observation of mountain lee waves with MODIS NIR column water vapor AN - 1559693733; 19433427 AB - Mountain lee waves have been previously observed in data from the Moderate Resolution Imaging Spectroradiometer (MODIS) "water vapor" 6.7 mu m channel which has a typical peak sensitivity at 550hPa in the free troposphere. This paper reports the first observation of mountain waves generated by the Appalachian Mountains in the MODIS total column water vapor (CWV) product derived from near-infrared (NIR) (0.94 mu m) measurements, which indicate perturbations very close to the surface. The CWV waves are usually observed during spring and late fall or some summer days with low to moderate CWV (below 2cm). The observed lee waves display wavelengths from 3-4 to 15km with an amplitude of variation often comparable to 50-70% of the total CWV. Since the bulk of atmospheric water vapor is confined to the boundary layer, this indicates that the impact of these waves extends deep into the boundary layer, and these may be the lowest level signatures of mountain lee waves presently detected by remote sensing over the land. JF - Geophysical Research Letters AU - Lyapustin, A AU - Alexander, MJ AU - Ott, L AU - Molod, A AU - Holben, B AU - Susskind, J AU - Wang, Y AD - NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Y1 - 2014/01// PY - 2014 DA - Jan 2014 SP - 710 EP - 716 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 41 IS - 2 SN - 0094-8276, 0094-8276 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - water vapor KW - mountain waves KW - MODIS KW - Atmospheric Water KW - Remote Sensing KW - Water Vapor KW - Mountain waves KW - Water vapor in the atmosphere KW - Boundary Layers KW - Remote sensing KW - Troposphere KW - Lee waves KW - Wave amplitude KW - Imaging techniques KW - Wavelengths KW - Mountains KW - Channels KW - Satellite data KW - Boundary layers KW - Waves KW - MODIS (Moderate Resolution Imaging Spectrometer) KW - Radiosondes KW - Stability Analysis KW - Q2 09263:Topography and morphology KW - SW 5040:Data acquisition KW - M2 551.510.5:General Description of Atmospheric Structure (551.510.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1559693733?accountid=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=Observation+of+mountain+lee+waves+with+MODIS+NIR+column+water+vapor&rft.au=Lyapustin%2C+A%3BAlexander%2C+MJ%3BOtt%2C+L%3BMolod%2C+A%3BHolben%2C+B%3BSusskind%2C+J%3BWang%2C+Y&rft.aulast=Lyapustin&rft.aufirst=A&rft.date=2014-01-01&rft.volume=41&rft.issue=2&rft.spage=710&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2F2013GL058770 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Boundary layers; Remote sensing; Troposphere; Radiosondes; Imaging techniques; Wave amplitude; Lee waves; Satellite data; Mountain waves; Water vapor in the atmosphere; MODIS (Moderate Resolution Imaging Spectrometer); Remote Sensing; Atmospheric Water; Channels; Mountains; Water Vapor; Boundary Layers; Waves; Stability Analysis; Wavelengths DO - http://dx.doi.org/10.1002/2013GL058770 ER - TY - JOUR T1 - Reassessing the approach to informed consent: the case of unrelated hematopoietic stem cell transplantation in adult thalassemia patients AN - 1554366480; 25115172 AB - Doc number: 13 Abstract Introduction: The informed consent process is the legal embodiment of the fundamental right of the individual to make decisions affecting his or her health., and the patient's permission is a crucial form of respect of freedom and dignity, it becomes extremely important to enhance the patient's understanding and recall of the information given by the physician. This statement acquires additional weight when the medical treatment proposed can potentially be detrimental or even fatal. This is the case of thalassemia patients pertaining to class 3 of the Pesaro classification where Allogenic hematopoietic stem cell transplantation (HSCT) remains the only potentially curative treatment. Unfortunately, this kind of intervention is burdened by an elevated transplantation-related mortality risk (TRM: all deaths considered related to transplantation), equal to 30% according to published reports. In thalassemia, the role of the patient in the informed consent process leading up to HSCT has not been fully investigated. This study investigated the hypothesis that information provided by physicians in the medical scenario of HSCT is not fully understood by patients and that misunderstanding and communication biases may affect the clinical decision-making process. Methods: A questionnaire was either mailed or given personally to 25 patients. A second questionnaire was administered to the 12 physicians attending the patients enrolled in this study. Descriptive statistics were used to evaluate the communication factors. Results: The results pointed out the difference between the risks communicated by physicians and the risks perceived by patients. Besides the study highlighted the mortality risk considered to be acceptable by patients and that considered to be acceptable by physicians. Conclusions: Several solutions have been suggested to reduce the gap between communicated and perceived data. A multi-disciplinary approach may possibly help to attenuate some aspects of communication bias. Several tools have also been proposed to fill or to attenuate the gap between communicated and perceived data. But the most important tool is the ability of the physician to comprehend the right place of conscious consent in the relationship with the patient. JF - Philosophy, Ethics and Humanities in Medicine : PEHM AU - Pisu, Salvatore AU - Caocci, Giovanni AU - d'Aloja, Ernesto AU - Efficace, Fabio AU - Vacca, Adriana AU - Piras, Eugenia AU - Orofino, Maria Grazia AU - Addari, Carmen AU - Pintor, Michela AU - Demontis, Roberto AU - Demuru, Federica AU - Pittau, Maria Rita AU - Collins, Gary S AU - La Nasa, Giorgio Y1 - 2014 PY - 2014 DA - 2014 EP - 13 CY - London PB - BioMed Central VL - 9 KW - Philosophy KW - Informed consent KW - Transplants & implants KW - Bone marrow KW - Stem cells KW - Mortality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1554366480?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthcompleteshell&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Philosophy%2C+Ethics+and+Humanities+in+Medicine+%3A+PEHM&rft.atitle=Reassessing+the+approach+to+informed+consent%3A+the+case+of+unrelated+hematopoietic+stem+cell+transplantation+in+adult+thalassemia+patients&rft.au=Pisu%2C+Salvatore%3BCaocci%2C+Giovanni%3Bd%27Aloja%2C+Ernesto%3BEfficace%2C+Fabio%3BVacca%2C+Adriana%3BPiras%2C+Eugenia%3BOrofino%2C+Maria+Grazia%3BAddari%2C+Carmen%3BPintor%2C+Michela%3BDemontis%2C+Roberto%3BDemuru%2C+Federica%3BPittau%2C+Maria+Rita%3BCollins%2C+Gary+S%3BLa+Nasa%2C+Giorgio&rft.aulast=Pisu&rft.aufirst=Salvatore&rft.date=2014-01-01&rft.volume=9&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Philosophy%2C+Ethics+and+Humanities+in+Medicine+%3A+PEHM&rft.issn=&rft_id=info:doi/10.1186%2F1747-5341-9-13 LA - English DB - ProQuest Central N1 - Copyright - © 2014 Pisu et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. N1 - Last updated - 2015-09-03 DO - http://dx.doi.org/10.1186/1747-5341-9-13 ER - TY - JOUR T1 - Using palaeo-climate comparisons to constrain future projections in CMIP5 AN - 1553087431; 2014-061873 AB - We present a selection of methodologies for using the palaeo-climate model component of the Coupled Model Intercomparison Project (Phase 5) (CMIP5) to attempt to constrain future climate projections using the same models. The constraints arise from measures of skill in hindcasting palaeo-climate changes from the present over three periods: the Last Glacial Maximum (LGM) (21 000 yr before present, ka), the mid-Holocene (MH) (6 ka) and the Last Millennium (LM) (850-1850 CE). The skill measures may be used to validate robust patterns of climate change across scenarios or to distinguish between models that have differing outcomes in future scenarios. We find that the multi-model ensemble of palaeo-simulations is adequate for addressing at least some of these issues. For example, selected benchmarks for the LGM and MH are correlated to the rank of future projections of precipitation/temperature or sea ice extent to indicate that models that produce the best agreement with palaeo-climate information give demonstrably different future results than the rest of the models. We also explore cases where comparisons are strongly dependent on uncertain forcing time series or show important non-stationarity, making direct inferences for the future problematic. Overall, we demonstrate that there is a strong potential for the palaeo-climate simulations to help inform the future projections and urge all the modelling groups to complete this subset of the CMIP5 runs. JF - Climate of the Past AU - Schmidt, Gavin A AU - Annan, J D AU - Bartlein, P J AU - Cook, B I AU - Guilyardi, E AU - Hargreaves, J C AU - Harrison, S P AU - Kageyama, M AU - LeGrande, A N AU - Konecky, Bronwen AU - Lovejoy, S AU - Mann, M E AU - Masson-Delmotte, V AU - Risi, C AU - Thompson, D AU - Timmermann, A AU - Tremblay, L B AU - Yiou, P Y1 - 2014 PY - 2014 DA - 2014 SP - 221 EP - 250 PB - Copernicus, Katlenburg-Lindau VL - 10 IS - 1 SN - 1814-9324, 1814-9324 KW - hydrology KW - general circulation models KW - CMIP5 KW - last glacial maximum KW - Quaternary KW - rainfall KW - sea ice KW - global KW - data processing KW - prediction KW - atmospheric precipitation KW - simulation KW - paleoclimatology KW - Holocene KW - climate change KW - temperature KW - models KW - Cenozoic KW - intertropical convergence zone KW - ice KW - Pleistocene KW - reconstruction KW - 24:Quaternary geology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553087431?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+of+the+Past&rft.atitle=Using+palaeo-climate+comparisons+to+constrain+future+projections+in+CMIP5&rft.au=Schmidt%2C+Gavin+A%3BAnnan%2C+J+D%3BBartlein%2C+P+J%3BCook%2C+B+I%3BGuilyardi%2C+E%3BHargreaves%2C+J+C%3BHarrison%2C+S+P%3BKageyama%2C+M%3BLeGrande%2C+A+N%3BKonecky%2C+Bronwen%3BLovejoy%2C+S%3BMann%2C+M+E%3BMasson-Delmotte%2C+V%3BRisi%2C+C%3BThompson%2C+D%3BTimmermann%2C+A%3BTremblay%2C+L+B%3BYiou%2C+P&rft.aulast=Schmidt&rft.aufirst=Gavin&rft.date=2014-01-01&rft.volume=10&rft.issue=1&rft.spage=221&rft.isbn=&rft.btitle=&rft.title=Climate+of+the+Past&rft.issn=18149324&rft_id=info:doi/10.5194%2Fcp-10-221-2014 L2 - http://www.copernicus.org/EGU/cp/cp.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 157 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-08-14 N1 - SubjectsTermNotLitGenreText - atmospheric precipitation; Cenozoic; climate change; CMIP5; data processing; general circulation models; global; Holocene; hydrology; ice; intertropical convergence zone; last glacial maximum; models; paleoclimatology; Pleistocene; prediction; Quaternary; rainfall; reconstruction; sea ice; simulation; temperature DO - http://dx.doi.org/10.5194/cp-10-221-2014 ER - TY - JOUR T1 - Abundances and implications of volatile-bearing species from evolved gas analysis of the Rocknest aeolian deposit, Gale Crater, Mars AN - 1553085307; 2014-064371 AB - The Sample Analysis at Mars (SAM) instrument on the Mars Science Laboratory (MSL) rover Curiosity detected evolved gases during thermal analysis of soil samples from the Rocknest aeolian deposit in Gale Crater. Major species detected (in order of decreasing molar abundance) were H (sub 2) O, SO (sub 2) , CO (sub 2) , and O (sub 2) , all at the mu mol level, with HCl, H (sub 2) S, NH (sub 3) , NO, and HCN present at the tens to hundreds of nmol level. We compute weight % numbers for the major gases evolved by assuming a likely source and calculate abundances between 0.5 and 3 wt.%. The evolution of these gases implies the presence of both oxidized (perchlorates) and reduced (sulfides or H-bearing) species as well as minerals formed under alkaline (carbonates) and possibly acidic (sulfates) conditions. Possible source phases in the Rocknest material are hydrated amorphous material, minor clay minerals, and hydrated perchlorate salts (all potential H (sub 2) O sources), carbonates (CO (sub 2) ), perchlorates (O (sub 2) and HCl), and potential N-bearing materials (e.g., Martian nitrates, terrestrial or Martian nitrogenated organics, ammonium salts) that evolve NH (sub 3) , NO, and/or HCN. We conclude that Rocknest materials are a physical mixture in chemical disequilibrium, consistent with aeolian mixing, and that although weathering is not extensive, it may be ongoing even under current Martian surface conditions. Abstract Copyright (2013), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Archer, Paul Douglas, Jr AU - Franz, Heather B AU - Sutter, Brad AU - Arevalo, Ricardo D, Jr AU - Coll, Patrice AU - Eigenbrode, Jennifer L AU - Glavin, Daniel P AU - Jones, John J AU - Leshin, Laurie A AU - Mahaffy, Paul R AU - McAdam, Amy C AU - McKay, Christopher P AU - Ming, Douglas W AU - Morris, Richard V AU - Navarro-Gonzalez, Rafael AU - Niles, Paul B AU - Pavlov, Alex AU - Squyres, Steven W AU - Stern, Jennifer C AU - Steele, Andrew AU - Wray, James J Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 237 EP - 254 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 1 SN - 2169-9097, 2169-9097 KW - eolian features KW - ammonium KW - water vapor KW - techniques KW - Mars KW - Rocknest landing site KW - landing sites KW - analysis KW - Gale Crater KW - carbon dioxide KW - mineral composition KW - Curiosity Rover KW - sediments KW - soils KW - sulfur dioxide KW - sulfates KW - nitrates KW - samples KW - perchlorate KW - gases KW - terrestrial planets KW - planets KW - volatiles KW - Mars Science Laboratory KW - soil gases KW - carbonates KW - instruments KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553085307?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Abundances+and+implications+of+volatile-bearing+species+from+evolved+gas+analysis+of+the+Rocknest+aeolian+deposit%2C+Gale+Crater%2C+Mars&rft.au=Archer%2C+Paul+Douglas%2C+Jr%3BFranz%2C+Heather+B%3BSutter%2C+Brad%3BArevalo%2C+Ricardo+D%2C+Jr%3BColl%2C+Patrice%3BEigenbrode%2C+Jennifer+L%3BGlavin%2C+Daniel+P%3BJones%2C+John+J%3BLeshin%2C+Laurie+A%3BMahaffy%2C+Paul+R%3BMcAdam%2C+Amy+C%3BMcKay%2C+Christopher+P%3BMing%2C+Douglas+W%3BMorris%2C+Richard+V%3BNavarro-Gonzalez%2C+Rafael%3BNiles%2C+Paul+B%3BPavlov%2C+Alex%3BSquyres%2C+Steven+W%3BStern%2C+Jennifer+C%3BSteele%2C+Andrew%3BWray%2C+James+J&rft.aulast=Archer&rft.aufirst=Paul&rft.date=2014-01-01&rft.volume=119&rft.issue=1&rft.spage=237&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004493 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 - 65 N1 - PubXState - DC N1 - Document feature - illus. incl. 7 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - ammonium; analysis; carbon dioxide; carbonates; Curiosity Rover; eolian features; Gale Crater; gases; instruments; landing sites; Mars; Mars Science Laboratory; mineral composition; nitrates; perchlorate; planets; Rocknest landing site; samples; sediments; soil gases; soils; sulfates; sulfur dioxide; techniques; terrestrial planets; volatiles; water vapor DO - http://dx.doi.org/10.1002/2013JE004493 ER - TY - JOUR T1 - Geochemical diversity in first rocks examined by the Curiosity Rover in Gale Crater; evidence for and significance of an alkali and volatile-rich igneous source AN - 1553085306; 2014-064364 AB - The first four rocks examined by the Mars Science Laboratory Alpha Particle X-ray Spectrometer indicate that Curiosity landed in a lithologically diverse region of Mars. These rocks, collectively dubbed the Bradbury assemblage, were studied along an eastward traverse (sols 46-102). Compositions range from Na- and Al-rich mugearite Jake_Matijevic to Fe-, Mg-, and Zn-rich alkali-rich basalt/hawaiite Bathurst_Inlet and span nearly the entire range in FeO* and MnO of the data sets from previous Martian missions and Martian meteorites. The Bradbury assemblage is also enriched in K and moderately volatile metals (Zn and Ge). These elements do not correlate with Cl or S, suggesting that they are associated with the rocks themselves and not with salt-rich coatings. Three out of the four Bradbury rocks plot along a line in elemental variation diagrams, suggesting mixing between Al-rich and Fe-rich components. ChemCam analyses give insight to their degree of chemical heterogeneity and grain size. Variations in trace elements detected by ChemCam suggest chemical weathering (Li) and concentration in mineral phases (e.g., Rb and Sr in feldspars). We interpret the Bradbury assemblage to be broadly volcanic and/or volcaniclastic, derived either from near the Gale crater rim and transported by the Peace Vallis fan network, or from a local volcanic source within Gale Crater. High Fe and Fe/Mn in Et_Then likely reflect secondary precipitation of Fe (super 3+) oxides as a cement or rind. The K-rich signature of the Bradbury assemblage, if igneous in origin, may have formed by small degrees of partial melting of metasomatized mantle. Abstract Copyright (2013), The Authors. JF - Journal of Geophysical Research: Planets AU - Schmidt, M E AU - Campbell, John L AU - Gellert, R AU - Perrett, G M AU - Treiman, A H AU - Blaney, D L AU - Olilla, A AU - Calef, F J, III AU - Edgar, L AU - Elliott, B E AU - Grotzinger, John P AU - Hurowitz, J AU - King, P L AU - Minitti, M E AU - Sautter, Violaine AU - Stack, K AU - Berger, J A AU - Bridges, John C AU - Ehlmann, B L AU - Forni, Olivier AU - Leshin, Laurie A AU - Lewis, K W AU - McLennan, Scott M AU - Ming, Douglas W AU - Newsom, H AU - Pradler, I AU - Squyres, Steven W AU - Stolper, E M AU - Thompson, L AU - VanBommel, S AU - Wiens, Roger C Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 64 EP - 81 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 1 SN - 2169-9097, 2169-9097 KW - silicates KW - stony meteorites KW - iron oxides KW - Martian meteorites KW - olivine group KW - Gale Crater KW - mugearite KW - meteorites KW - mineral composition KW - clinopyroxene KW - alkali feldspar KW - basalts KW - orthosilicates KW - X-ray analysis KW - ChemCam KW - framework silicates KW - chain silicates KW - Peace Vallis KW - apatite KW - plagioclase KW - chromite KW - alkalic composition KW - terrestrial planets KW - planets KW - orthoclase KW - nepheline KW - X-ray spectroscopy KW - potassium KW - Mars Science Laboratory KW - spectroscopy KW - feldspar group KW - strontium KW - ilmenite KW - alkali basalts KW - zinc KW - volcanic rocks KW - igneous rocks KW - partial melting KW - mantle KW - Mars KW - landing sites KW - metasomatism KW - manganese KW - iron KW - pyroxene group KW - alpha-ray spectroscopy KW - olivine KW - Curiosity Rover KW - oxides KW - nepheline group KW - diopside KW - chemical composition KW - alkaline earth metals KW - Bradbury Landing KW - rubidium KW - alkali metals KW - phosphates KW - achondrites KW - ferrous iron KW - nesosilicates KW - volatiles KW - metals KW - germanium KW - magnetite KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553085306?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Geochemical+diversity+in+first+rocks+examined+by+the+Curiosity+Rover+in+Gale+Crater%3B+evidence+for+and+significance+of+an+alkali+and+volatile-rich+igneous+source&rft.au=Schmidt%2C+M+E%3BCampbell%2C+John+L%3BGellert%2C+R%3BPerrett%2C+G+M%3BTreiman%2C+A+H%3BBlaney%2C+D+L%3BOlilla%2C+A%3BCalef%2C+F+J%2C+III%3BEdgar%2C+L%3BElliott%2C+B+E%3BGrotzinger%2C+John+P%3BHurowitz%2C+J%3BKing%2C+P+L%3BMinitti%2C+M+E%3BSautter%2C+Violaine%3BStack%2C+K%3BBerger%2C+J+A%3BBridges%2C+John+C%3BEhlmann%2C+B+L%3BForni%2C+Olivier%3BLeshin%2C+Laurie+A%3BLewis%2C+K+W%3BMcLennan%2C+Scott+M%3BMing%2C+Douglas+W%3BNewsom%2C+H%3BPradler%2C+I%3BSquyres%2C+Steven+W%3BStolper%2C+E+M%3BThompson%2C+L%3BVanBommel%2C+S%3BWiens%2C+Roger+C&rft.aulast=Schmidt&rft.aufirst=M&rft.date=2014-01-01&rft.volume=119&rft.issue=1&rft.spage=64&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004481 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 114 N1 - PubXState - DC N1 - Document feature - illus. incl. 8 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - achondrites; alkali basalts; alkali feldspar; alkali metals; alkalic composition; alkaline earth metals; alpha-ray spectroscopy; apatite; basalts; Bradbury Landing; chain silicates; ChemCam; chemical composition; chromite; clinopyroxene; Curiosity Rover; diopside; feldspar group; ferrous iron; framework silicates; Gale Crater; germanium; igneous rocks; ilmenite; iron; iron oxides; landing sites; magnetite; manganese; mantle; Mars; Mars Science Laboratory; Martian meteorites; metals; metasomatism; meteorites; mineral composition; mugearite; nepheline; nepheline group; nesosilicates; olivine; olivine group; orthoclase; orthosilicates; oxides; partial melting; Peace Vallis; phosphates; plagioclase; planets; potassium; pyroxene group; rubidium; silicates; spectroscopy; stony meteorites; strontium; terrestrial planets; volatiles; volcanic rocks; X-ray analysis; X-ray spectroscopy; zinc DO - http://dx.doi.org/10.1002/2013JE004481 ER - TY - JOUR T1 - Fresh shallow valleys in the Martian midlatitudes as features formed by meltwater flow beneath ice AN - 1553085100; 2014-064366 AB - Significant numbers of valleys have been identified in the Martian midlatitudes (30-60 degrees N/S), spatially associated with extant or recent ice accumulations. Many of these valleys date to the Amazonian, but their formation during these cold, dry epochs is problematic. In this study, we look in detail at the form, distribution, and quantitative geomorphology of two suites of these valleys and their associated landforms in order to better constrain the processes of their formation. Since the valleys themselves are so young and thus well preserved, uniquely, we can constrain valley widths and courses and link these to the topography from the Mars Orbiter Laser Altimeter and High-Resolution Stereo Camera data. We show that the valleys are both qualitatively and quantitatively very similar, despite their being >5000 km apart in different hemispheres and around 7 km apart in elevation. Buffered crater counting indicates that the ages of these networks are statistically identical, probably forming during the Late Amazonian, approximately 100 Ma. In both localities, at least tens of valleys cross local drainage divides, apparently flowing uphill. We interpret these uphill reaches to be characteristic of flow occurring beneath a now absent, relatively thin (order 10 (super 1) -10 (super 2) m), regionally extensive ice cover. Ridges and mounds occasionally found at the foot of these valley systems are analogous to eskers and aufeis-like refreezing features. On the basis of their interaction with these aufeis-like mounds, we suggest that this suite of landforms may have formed in a single, short episode (perhaps order of days), probably forced by global climate change. Abstract Copyright (2014), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Hobley, Daniel E J AU - Howard, Alan D AU - Moore, Jeffrey M Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 128 EP - 153 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 1 SN - 2169-9097, 2169-9097 KW - high-resolution methods KW - valleys KW - erosion KW - subglacial processes KW - drainage KW - water erosion KW - Mars KW - laser ranging KW - altimetry KW - Mars Orbiter Camera KW - ice sheets KW - climate change KW - terrestrial planets KW - planets KW - Amazonian KW - ice KW - surface features KW - fluvial features KW - ground ice KW - glacial geology KW - geomorphology KW - remote sensing KW - meltwater KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553085100?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Fresh+shallow+valleys+in+the+Martian+midlatitudes+as+features+formed+by+meltwater+flow+beneath+ice&rft.au=Hobley%2C+Daniel+E+J%3BHoward%2C+Alan+D%3BMoore%2C+Jeffrey+M&rft.aulast=Hobley&rft.aufirst=Daniel+E&rft.date=2014-01-01&rft.volume=119&rft.issue=1&rft.spage=128&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004396 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 - 121 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - altimetry; Amazonian; climate change; drainage; erosion; fluvial features; geomorphology; glacial geology; ground ice; high-resolution methods; ice; ice sheets; laser ranging; Mars; Mars Orbiter Camera; meltwater; planets; remote sensing; subglacial processes; surface features; terrestrial planets; valleys; water erosion DO - http://dx.doi.org/10.1002/2013JE004396 ER - TY - JOUR T1 - Trace element geochemistry (Li, Ba, Sr, and Rb) using Curiosity's ChemCam; early results for Gale Crater from Bradbury landing site to Rocknest AN - 1553084508; 2014-064372 AB - The ChemCam instrument package on the Mars rover, Curiosity, provides new capabilities to probe the abundances of certain trace elements in the rocks and soils on Mars using the laser-induced breakdown spectroscopy technique. We focus on detecting and quantifying Li, Ba, Rb, and Sr in targets analyzed during the first 100 sols, from Bradbury Landing Site to Rocknest. Univariate peak area models and multivariate partial least squares models are presented. Li, detected for the first time directly on Mars, is generally low (100 ppm and >1000 ppm, respectively. These analysis locations tend to have high Si and alkali abundances, consistent with a feldspar composition. Together, these trace element observations provide possible evidence of magma differentiation and aqueous alteration. Abstract Copyright (2013), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Planets AU - Ollila, Ann M AU - Newsom, Horton E AU - Clark, Benton, III AU - Wiens, Roger C AU - Cousin, Agnes AU - Mangold, Nicolas AU - Sautter, Violaine AU - Maurice, Sylvestre AU - Clegg, Samuel M AU - Gasnault, Olivier AU - Forni, Olivier AU - Tokar, Robert AU - Lewin, Eric AU - Dyar, M Darby AU - Lasue, Jeremie AU - Anderson, Ryan AU - McLennan, Scott M AU - Bridges, John C AU - Vaniman, Dave AU - Lanza, Nina AU - Fabre, Cecile AU - Melikechi, Noureddine AU - Perrett, Glynis M AU - Campbell, John L AU - King, Penelope L AU - Barraclough, Bruce AU - Delapp, Dorothea AU - Johnstone, Stephen AU - Meslin, Pierre-Yves AU - Rosen-Gooding, Anya AU - Williams, Josh Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 255 EP - 285 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 1 SN - 2169-9097, 2169-9097 KW - magmatic differentiation KW - laser-induced breakdown spectroscopy KW - pebbles KW - Mars KW - Rocknest landing site KW - landing sites KW - Gale Crater KW - barium KW - Curiosity Rover KW - sediments KW - ChemCam KW - trace elements KW - Bathurst Inlet KW - sand KW - alkaline earth metals KW - chemical analysis KW - clastic sediments KW - lithium KW - Bradbury Landing KW - rubidium KW - alkali metals KW - trace-element analyses KW - emission spectroscopy KW - terrestrial planets KW - aqueous alteration KW - planets KW - metals KW - magmas KW - Mars Science Laboratory KW - spectroscopy KW - strontium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553084508?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Planets&rft.atitle=Trace+element+geochemistry+%28Li%2C+Ba%2C+Sr%2C+and+Rb%29+using+Curiosity%27s+ChemCam%3B+early+results+for+Gale+Crater+from+Bradbury+landing+site+to+Rocknest&rft.au=Ollila%2C+Ann+M%3BNewsom%2C+Horton+E%3BClark%2C+Benton%2C+III%3BWiens%2C+Roger+C%3BCousin%2C+Agnes%3BMangold%2C+Nicolas%3BSautter%2C+Violaine%3BMaurice%2C+Sylvestre%3BClegg%2C+Samuel+M%3BGasnault%2C+Olivier%3BForni%2C+Olivier%3BTokar%2C+Robert%3BLewin%2C+Eric%3BDyar%2C+M+Darby%3BLasue%2C+Jeremie%3BAnderson%2C+Ryan%3BMcLennan%2C+Scott+M%3BBridges%2C+John+C%3BVaniman%2C+Dave%3BLanza%2C+Nina%3BFabre%2C+Cecile%3BMelikechi%2C+Noureddine%3BPerrett%2C+Glynis+M%3BCampbell%2C+John+L%3BKing%2C+Penelope+L%3BBarraclough%2C+Bruce%3BDelapp%2C+Dorothea%3BJohnstone%2C+Stephen%3BMeslin%2C+Pierre-Yves%3BRosen-Gooding%2C+Anya%3BWilliams%2C+Josh&rft.aulast=Ollila&rft.aufirst=Ann&rft.date=2014-01-01&rft.volume=119&rft.issue=1&rft.spage=255&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Planets&rft.issn=21699097&rft_id=info:doi/10.1002%2F2013JE004517 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9100 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 140 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; aqueous alteration; barium; Bathurst Inlet; Bradbury Landing; ChemCam; chemical analysis; clastic sediments; Curiosity Rover; emission spectroscopy; Gale Crater; landing sites; laser-induced breakdown spectroscopy; lithium; magmas; magmatic differentiation; Mars; Mars Science Laboratory; metals; pebbles; planets; Rocknest landing site; rubidium; sand; sediments; spectroscopy; strontium; terrestrial planets; trace elements; trace-element analyses DO - http://dx.doi.org/10.1002/2013JE004517 ER - TY - JOUR T1 - Modeling hypersonic entry with the fully-implicit Navier-Stokes (FIN-S) stabilized finite element flow solver AN - 1551063709; 20081356 AB - In this paper, we present a novel scheme for modeling the hypersonic atmospheric entry of large vehicles with an ablative thermal protection system. The Favre-averaged thermochemical nonequilibrium Navier-Stokes equations with Spalart-Allmaras turbulence closure, thermodynamic, chemical kinetic, and quasi-steady ablation model are presented. The numerical method is based on a streamline upwind Petrov-Galerkin (SUPG) stabilized finite element formulation. The formulation and implementation of the finite element approximation are discussed in detail. The performance of the scheme is investigated through a series of increasingly complex applications, culminating in the simulation of a three-dimensional ablating heatshield in transitioning flow. JF - Computers & Fluids AU - Kirk, Benjamin S AU - Stogner, Roy H AU - Bauman, Paul T AU - Oliver, Todd A AD - NASA Lyndon B. Johnson Space Center, Houston, TX 77058, United States, benjamin.kirk@nasa.gov Y1 - 2014///0, PY - 2014 DA - 0, 2014 SP - 281 EP - 292 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 92 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Stabilized finite elements KW - Compressible flow KW - Hypersonic flow KW - Reentry KW - Surface ablation KW - Thermodynamics KW - Computers KW - Protection KW - turbulence KW - Chemical kinetics KW - Model Studies KW - Navier-Stokes equations KW - Kinetics KW - Finite Element Method KW - Ablation 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/1551063709?accountid=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=Modeling+hypersonic+entry+with+the+fully-implicit+Navier-Stokes+%28FIN-S%29+stabilized+finite+element+flow+solver&rft.au=Kirk%2C+Benjamin+S%3BStogner%2C+Roy+H%3BBauman%2C+Paul+T%3BOliver%2C+Todd+A&rft.aulast=Kirk&rft.aufirst=Benjamin&rft.date=2014-01-01&rft.volume=92&rft.issue=&rft.spage=281&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/10.1016%2Fj.compfluid.2013.10.003 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Thermodynamics; Navier-Stokes equations; Chemical kinetics; Ablation; Modelling; Computers; Kinetics; Finite Element Method; Protection; turbulence; Model Studies DO - http://dx.doi.org/10.1016/j.compfluid.2013.10.003 ER - TY - JOUR T1 - A TEM investigation of the fine-grained matrix of the Martian basaltic breccia NWA 7034 AN - 1549618630; 2014-060108 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Muttik, N AU - Keller, L P AU - Agee, C B AU - McCubbin, F M AU - Santos, A R AU - Rahman, Z AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 2763 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - Northwest Africa Meteorites KW - stony meteorites KW - thermal alteration KW - Martian meteorites KW - microstructure KW - meteorites KW - pyroxene group KW - NWA 7034 KW - oxides KW - framework silicates KW - basaltic composition KW - chain silicates KW - plagioclase KW - textures KW - matrix KW - achondrites KW - TEM data KW - aqueous alteration KW - fine-grained materials KW - brecciation KW - sheet silicates KW - maghemite KW - feldspar group KW - magnetite KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549618630?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+TEM+investigation+of+the+fine-grained+matrix+of+the+Martian+basaltic+breccia+NWA+7034&rft.au=Muttik%2C+N%3BKeller%2C+L+P%3BAgee%2C+C+B%3BMcCubbin%2C+F+M%3BSantos%2C+A+R%3BRahman%2C+Z%3BAnonymous&rft.aulast=Muttik&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/2763.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 May 1, 2014 N1 - Last updated - 2014-07-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - achondrites; aqueous alteration; basaltic composition; brecciation; chain silicates; feldspar group; fine-grained materials; framework silicates; maghemite; magnetite; Martian meteorites; matrix; meteorites; microstructure; Northwest Africa Meteorites; NWA 7034; oxides; plagioclase; pyroxene group; sheet silicates; silicates; stony meteorites; TEM data; textures; thermal alteration ER - TY - JOUR T1 - Assessing the impact of Laurentide ice sheet topography on glacial climate AN - 1549618437; 2014-060253 AB - Simulations of past climates require altered boundary conditions to account for known shifts in the Earth system. For the Last Glacial Maximum (LGM) and subsequent deglaciation, the existence of large Northern Hemisphere ice sheets caused profound changes in surface topography and albedo. While ice-sheet extent is fairly well known, numerous conflicting reconstructions of ice-sheet topography suggest that precision in this boundary condition is lacking. Here we use a high-resolution and oxygen-isotope-enabled fully coupled global circulation model (GCM) (GISS ModelE2-R), along with two different reconstructions of the Laurentide Ice Sheet (LIS) that provide maximum and minimum estimates of LIS elevation, to assess the range of climate variability in response to uncertainty in this boundary condition. We present this comparison at two equilibrium time slices: the LGM, when differences in ice-sheet topography are maximized, and 14 ka, when differences in maximum ice-sheet height are smaller but still exist. Overall, we find significant differences in the climate response to LIS topography, with the larger LIS resulting in enhanced Atlantic Meridional Overturning Circulation and warmer surface air temperatures, particularly over northeastern Asia and the North Pacific. These up- and downstream effects are associated with differences in the development of planetary waves in the upper atmosphere, with the larger LIS resulting in a weaker trough over northeastern Asia that leads to the warmer temperatures and decreased albedo from snow and sea-ice cover. Differences between the 14 ka simulations are similar in spatial extent but smaller in magnitude, suggesting that climate is responding primarily to the larger difference in maximum LIS elevation in the LGM simulations. These results suggest that such uncertainty in ice-sheet boundary conditions alone may significantly impact the results of paleoclimate simulations and their ability to successfully simulate past climates, with implications for estimating climate sensitivity to greenhouse gas forcing utilizing past climate states. JF - Climate of the Past AU - Ullman, D J AU - LeGrande, A N AU - Carlson, Anders E AU - Anslow, F S AU - Licciardi, J M Y1 - 2014 PY - 2014 DA - 2014 SP - 487 EP - 507 PB - Copernicus, Katlenburg-Lindau VL - 10 IS - 2 SN - 1814-9324, 1814-9324 KW - albedo KW - sea water KW - Laurentide ice sheet KW - last glacial maximum KW - oxygen KW - glaciation KW - isotopes KW - sea ice KW - paleo-oceanography KW - simulation KW - paleoclimatology KW - stable isotopes KW - deglaciation KW - Atlantic meridional overturning circulation KW - Cenozoic KW - intertropical convergence zone KW - atmospheric circulation KW - hydrologic cycle KW - topography KW - paleotemperature KW - ice KW - ground-surface temperature KW - climate forcing KW - uncertainty KW - climate KW - hydrology KW - general circulation models KW - ocean circulation KW - CMIP5 KW - Quaternary KW - sea surface water KW - isotope ratios KW - O-18/O-16 KW - ice sheets KW - boundary conditions KW - paleosalinity KW - Pleistocene KW - greenhouse gases KW - glacial geology KW - sea-surface temperature KW - Atlantic Ocean KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549618437?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+of+the+Past&rft.atitle=Assessing+the+impact+of+Laurentide+ice+sheet+topography+on+glacial+climate&rft.au=Ullman%2C+D+J%3BLeGrande%2C+A+N%3BCarlson%2C+Anders+E%3BAnslow%2C+F+S%3BLicciardi%2C+J+M&rft.aulast=Ullman&rft.aufirst=D&rft.date=2014-01-01&rft.volume=10&rft.issue=2&rft.spage=487&rft.isbn=&rft.btitle=&rft.title=Climate+of+the+Past&rft.issn=18149324&rft_id=info:doi/10.5194%2Fcp-10-487-2014 L2 - http://www.climate-of-the-past.net/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 152 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-06-18 N1 - SubjectsTermNotLitGenreText - albedo; Atlantic meridional overturning circulation; Atlantic Ocean; atmospheric circulation; boundary conditions; Cenozoic; climate; climate forcing; CMIP5; deglaciation; general circulation models; glacial geology; glaciation; greenhouse gases; ground-surface temperature; hydrologic cycle; hydrology; ice; ice sheets; intertropical convergence zone; isotope ratios; isotopes; last glacial maximum; Laurentide ice sheet; O-18/O-16; ocean circulation; oxygen; paleo-oceanography; paleoclimatology; paleosalinity; paleotemperature; Pleistocene; Quaternary; sea ice; sea surface water; sea water; sea-surface temperature; simulation; stable isotopes; topography; uncertainty DO - http://dx.doi.org/10.5194/cp-10-487-2014 ER - TY - JOUR T1 - Uncertainties in the modelled CO (sub 2) threshold for Antarctic glaciation AN - 1549618419; 2014-060251 AB - A frequently cited atmospheric CO (sub 2) threshold for the onset of Antarctic glaciation of approximately 780 ppmv is based on the study of DeConto and Pollard (2003) using an ice sheet model and the GENESIS climate model. Proxy records suggest that atmospheric CO (sub 2) concentrations passed through this threshold across the Eocene-Oligocene transition approximately 34 Ma. However, atmospheric CO (sub 2) concentrations may have been close to this threshold earlier than this transition, which is used by some to suggest the possibility of Antarctic ice sheets during the Eocene. Here we investigate the climate model dependency of the threshold for Antarctic glaciation by performing offline ice sheet model simulations using the climate from 7 different climate models with Eocene boundary conditions (HadCM3L, CCSM3, CESM1.0, GENESIS, FAMOUS, ECHAM5 and GISS_ER). These climate simulations are sourced from a number of independent studies, and as such the boundary conditions, which are poorly constrained during the Eocene, are not identical between simulations. The results of this study suggest that the atmospheric CO (sub 2) threshold for Antarctic glaciation is highly dependent on the climate model used and the climate model configuration. A large discrepancy between the climate model and ice sheet model grids for some simulations leads to a strong sensitivity to the lapse rate parameter. JF - Climate of the Past AU - Gasson, E AU - Lunt, D J AU - DeConto, R AU - Goldner, A AU - Heinemann, M AU - Huber, M AU - LeGrande, A N AU - Pollard, D AU - Sagoo, N AU - Siddall, M AU - Winguth, A AU - Valdes, P J Y1 - 2014 PY - 2014 DA - 2014 SP - 451 EP - 466 PB - Copernicus, Katlenburg-Lindau VL - 10 IS - 2 SN - 1814-9324, 1814-9324 KW - glaciation KW - paleoclimatology KW - HadCM3L KW - carbon dioxide KW - Cenozoic KW - atmospheric circulation KW - topography KW - climate forcing KW - uncertainty KW - bedrock KW - general circulation models KW - Eocene KW - atmosphere KW - Paleogene KW - paleogeography KW - GENESIS model KW - ice sheets KW - boundary conditions KW - models KW - Antarctic ice sheet KW - Tertiary KW - Antarctica KW - glacial geology KW - Oligocene KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549618419?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climate+of+the+Past&rft.atitle=Uncertainties+in+the+modelled+CO+%28sub+2%29+threshold+for+Antarctic+glaciation&rft.au=Gasson%2C+E%3BLunt%2C+D+J%3BDeConto%2C+R%3BGoldner%2C+A%3BHeinemann%2C+M%3BHuber%2C+M%3BLeGrande%2C+A+N%3BPollard%2C+D%3BSagoo%2C+N%3BSiddall%2C+M%3BWinguth%2C+A%3BValdes%2C+P+J&rft.aulast=Gasson&rft.aufirst=E&rft.date=2014-01-01&rft.volume=10&rft.issue=2&rft.spage=451&rft.isbn=&rft.btitle=&rft.title=Climate+of+the+Past&rft.issn=18149324&rft_id=info:doi/10.5194%2Fcp-10-451-2014 L2 - http://www.copernicus.org/EGU/cp/cp.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 73 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-07-31 N1 - SubjectsTermNotLitGenreText - Antarctic ice sheet; Antarctica; atmosphere; atmospheric circulation; bedrock; boundary conditions; carbon dioxide; Cenozoic; climate forcing; Eocene; general circulation models; GENESIS model; glacial geology; glaciation; HadCM3L; ice sheets; models; Oligocene; paleoclimatology; Paleogene; paleogeography; Tertiary; topography; uncertainty DO - http://dx.doi.org/10.5194/cp-10-451-2014 ER - TY - JOUR T1 - Experimental constraints on a Vesta magma ocean AN - 1549617832; 2014-060089 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Hoff, C AU - Jones, John H AU - Le, Loan AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1634 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - silicates KW - calcium KW - magmatic differentiation KW - magnesium KW - stony meteorites KW - oxygen KW - asteroids KW - olivine group KW - melts KW - fugacity KW - temperature KW - partitioning KW - meteorites KW - pyroxene group KW - phase equilibria KW - cumulates KW - olivine KW - orthosilicates KW - chain silicates KW - alkaline earth metals KW - magma oceans KW - experimental studies KW - Vesta Asteroid KW - diogenite KW - achondrites KW - nesosilicates KW - metals KW - magmas KW - eucrite KW - crystallization KW - orthopyroxene KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617832?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Experimental+constraints+on+a+Vesta+magma+ocean&rft.au=Hoff%2C+C%3BJones%2C+John+H%3BLe%2C+Loan%3BAnonymous&rft.aulast=Hoff&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/1634.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 - 9 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on Apr. 30, 2014 N1 - Last updated - 2014-07-31 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - achondrites; alkaline earth metals; asteroids; calcium; chain silicates; crystallization; cumulates; diogenite; eucrite; experimental studies; fugacity; magma oceans; magmas; magmatic differentiation; magnesium; melts; metals; meteorites; nesosilicates; olivine; olivine group; orthopyroxene; orthosilicates; oxygen; partitioning; phase equilibria; pyroxene group; silicates; stony meteorites; temperature; Vesta Asteroid ER - TY - JOUR T1 - Holocene freshwater carbonate structures in the hyper-arid Gebel Uweinat region of the Sahara Desert (southwestern Egypt) AN - 1529793436; 2014-034782 AB - The eastern part of the Sahara is at present the driest region of the desert. Yet the extensive animal rock art in the area, presumed to depict real activities in the lives of the painters, suggests that environmental conditions were significantly different when the rock art was produced. Here we report on exploration of the area, which led to the discovery of morphologically-distinct carbonate structures that line the walls of two valleys in Gebel Uweinat, and were likely formed in standing water. The carbonate structures comprise what appear to be shoreline carbonate formations, and date back to 8100 and 9400 years BP. The chemical and morphological similarity of these formations to carbonate structures from modern lakes suggests that these lakes contained fresh, standing water suitable for human and animal use. However, the significant quartz content suggests that windblown sand was pervasive, and thus the vegetation cover may have been sparse. This discovery supports the possibility of grasslands in the area, which may have been able to support human habitation, and adds to the evidence for a wetter climate in the area in the early Holocene. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of African Earth Sciences AU - Marinova, Margarita M AU - Meckler, A Nele AU - McKay, Christopher P Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 50 EP - 55 PB - Elsevier, Oxford VL - 89 SN - 1464-343X, 1464-343X KW - southwestern Egypt KW - Quaternary KW - North Africa KW - fresh-water environment KW - paleoclimatology KW - Holocene KW - Gebel Uweinat KW - Egypt KW - Cenozoic KW - sedimentary rocks KW - Africa KW - Sahara KW - carbonate rocks KW - sedimentary structures KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529793436?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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+African+Earth+Sciences&rft.atitle=Holocene+freshwater+carbonate+structures+in+the+hyper-arid+Gebel+Uweinat+region+of+the+Sahara+Desert+%28southwestern+Egypt%29&rft.au=Marinova%2C+Margarita+M%3BMeckler%2C+A+Nele%3BMcKay%2C+Christopher+P&rft.aulast=Marinova&rft.aufirst=Margarita&rft.date=2014-01-01&rft.volume=89&rft.issue=&rft.spage=50&rft.isbn=&rft.btitle=&rft.title=Journal+of+African+Earth+Sciences&rft.issn=1464343X&rft_id=info:doi/10.1016%2Fj.jafrearsci.2013.10.003 L2 - http://www.sciencedirect.com/science/journal/1464343X 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 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2014-05-29 N1 - SubjectsTermNotLitGenreText - Africa; carbonate rocks; Cenozoic; Egypt; fresh-water environment; Gebel Uweinat; Holocene; North Africa; paleoclimatology; Quaternary; Sahara; sedimentary rocks; sedimentary structures; southwestern Egypt DO - http://dx.doi.org/10.1016/j.jafrearsci.2013.10.003 ER - TY - JOUR T1 - Effects of 3-D clouds on atmospheric transmission of solar radiation: Cloud type dependencies inferred from A-train satellite data AN - 1520383916; 19625772 AB - Three-dimensional (3-D) effects on broadband shortwave top of atmosphere (TOA) nadir radiance, atmospheric absorption, and surface irradiance are examined using 3-D cloud fields obtained from one hour's worth of A-train satellite observations and one-dimensional (1-D) independent column approximation (ICA) and full 3-D radiative transfer simulations. The 3-D minus ICA differences in TOA nadir radiance multiplied by pi , atmospheric absorption, and surface downwelling irradiance, denoted as pi Delta I, Delta A, and Delta T, respectively, are analyzed by cloud type. At the 1 km pixel scale, pi Delta I, Delta A, and Delta T exhibit poor spatial correlation. Once averaged with a moving window, however, better linear relationships among pi Delta I, Delta A, and Delta T emerge, especially for moving windows larger than 5km and large theta sub(0). While cloud properties and solar geometry are shown to influence the relationships amongst pi Delta I, Delta A, and Delta T, once they are separated by cloud type, their linear relationships become much stronger. This suggests that ICA biases in surface irradiance and atmospheric absorption can be approximated based on ICA biases in nadir radiance as a function of cloud type. JF - Journal of Geophysical Research: Atmospheres AU - Ham, Seung-Hee AU - Kato, Seiji AU - Barker, Howard W AU - Rose, Fred G AU - Sun-Mack, Sunny AD - NASA Langley Research Center, Hampton, Virginia, USA. Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 943 EP - 963 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 2 SN - 2169-897X, 2169-897X KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - 3D KW - ICA KW - CERES KW - MODIS KW - CloudSat KW - CALIPSO KW - Clouds KW - Three dimensional KW - Radiance KW - Irradiance KW - Atmospherics KW - Atmospheres KW - Approximation KW - Surface chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520383916?accountid=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=Effects+of+3-D+clouds+on+atmospheric+transmission+of+solar+radiation%3A+Cloud+type+dependencies+inferred+from+A-train+satellite+data&rft.au=Ham%2C+Seung-Hee%3BKato%2C+Seiji%3BBarker%2C+Howard+W%3BRose%2C+Fred+G%3BSun-Mack%2C+Sunny&rft.aulast=Ham&rft.aufirst=Seung-Hee&rft.date=2014-01-01&rft.volume=119&rft.issue=2&rft.spage=943&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD020683 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Last updated - 2017-01-05 DO - http://dx.doi.org/10.1002/2013JD020683 ER - TY - JOUR T1 - Impact of radiatively interactive dust aerosols in the NASA GEOS-5 climate model: Sensitivity to dust particle shape and refractive index AN - 1520371972; 19625795 AB - The radiative effects of Saharan dust aerosols are investigated in the NASA GEOS-5 atmospheric general circulation model. A sectional aerosol microphysics model (CARMA) is run online in GEOS-5. CARMA treats the dust aerosol lifecycle, and its tracers are radiatively coupled to GEOS-5. A series of AMIP-style simulations are performed, in which input dust optical properties (particle shape and refractive index) are varied. Simulated dust distributions for summertime Saharan dust compare well to observations, with best results found when the most absorbing dust optical properties are assumed. Dust absorption leads to a strengthening of the summertime Hadley cell circulation, increased dust lofting to higher altitudes, and a strengthening of the African easterly jet, resulting in increased dust atmospheric lifetime and farther northward and westward transport. We find a positive feedback of dust radiative forcing on emissions, in contrast with previous studies, which we attribute to our having a relatively strong longwave forcing caused by our simulating larger effective particle sizes. This longwave forcing reduces the magnitude of midday net surface cooling relative to other studies, and leads to a nighttime warming that results in higher nighttime wind speeds and dust emissions. The radiative effects of dust particle shape have only minor impact on transport and emissions, with small ( similar to 5%) impact on top of atmosphere shortwave forcing, in line with previous studies, but relatively more pronounced effects on shortwave atmospheric heating and surface forcing ( similar to 20% increase in atmospheric forcing for spheroids). Shape effects on longwave heating terms are of order similar to 10%. JF - Journal of Geophysical Research: Atmospheres AU - Colarco, Peter R AU - Nowottnick, Edward P AU - Randles, Cynthia A AU - Yi, Bingqi AU - Yang, Ping AU - Kim, Kyu-Myong AU - Smith, Jamison A AU - Bardeen, Charles G AD - Atmospheric Chemistry and Dynamics Laboratory, NASA GSFC, Greenbelt, Maryland, USA. Y1 - 2014/01// PY - 2014 DA - Jan 2014 SP - 753 EP - 786 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 119 IS - 2 SN - 2169-897X, 2169-897X KW - Water Resources Abstracts; Aqualine Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - dust KW - aerosols KW - radiative forcing KW - modeling KW - nonsphericity KW - Atmospheric heating KW - Optical properties KW - Particle Shape KW - Hadley cells KW - Positive feedback KW - Dust particles KW - Atmospheric circulation-oceanic circulation coupled models KW - Dust emission KW - Wind speed KW - Altitude KW - Radiative forcing KW - Absorption KW - Optical Properties KW - Refractive index KW - Particle size KW - Atmospheric particulates KW - Aerosols KW - Climate models KW - Saharan dust KW - Climates KW - Climate KW - Atmospheric circulation KW - Dusts KW - Model Studies KW - Heating KW - Numerical simulations KW - General circulation models KW - Atmospheric forcing KW - Africa, Sahara Desert KW - Africa KW - Eolian dust KW - AQ 00001:Water Resources and Supplies KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 5010:Network design KW - Q5 08503:Characteristics, behavior and fate KW - M2 551.581:Latitudinal Influences (551.581) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520371972?accountid=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=Impact+of+radiatively+interactive+dust+aerosols+in+the+NASA+GEOS-5+climate+model%3A+Sensitivity+to+dust+particle+shape+and+refractive+index&rft.au=Colarco%2C+Peter+R%3BNowottnick%2C+Edward+P%3BRandles%2C+Cynthia+A%3BYi%2C+Bingqi%3BYang%2C+Ping%3BKim%2C+Kyu-Myong%3BSmith%2C+Jamison+A%3BBardeen%2C+Charles+G&rft.aulast=Colarco&rft.aufirst=Peter&rft.date=2014-01-01&rft.volume=119&rft.issue=2&rft.spage=753&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2F2013JD020046 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Particle size; Atmospheric particulates; Aerosols; Optical properties; Climate; Atmospheric forcing; Atmospheric circulation; Refractive index; Eolian dust; Climate models; Saharan dust; Atmospheric heating; Hadley cells; Positive feedback; Dust particles; Atmospheric circulation-oceanic circulation coupled models; Dust emission; Wind speed; Radiative forcing; Numerical simulations; General circulation models; Altitude; Heating; Climates; Absorption; Particle Shape; Optical Properties; Dusts; Model Studies; Africa, Sahara Desert; Africa DO - http://dx.doi.org/10.1002/2013JD020046 ER - TY - JOUR T1 - Dust production of comet 21P/Giacobini-Zinner using broadband photometry AN - 1520105134; 2014-028410 AB - Presented here are results from photometric analysis on broadband images taken of comet 21P/Giacobini-Zinner from May 24, 2011 to October 24, 2011. As the parent body of the Draconids, a meteor shower known for outbursting, 21P was studied for its dust production activity, Afrho , focusing on how it changes with heliocentric distance. An expected increase in dust production with a decrease in heliocentric distance was observed. The comet went from heliocentric distance of 3.05 -1.77 AU during the observed time that corresponded to an apparent magnitude of 19.61 to 15.72 and Afrho of 16.48 cm to 284.17 cm. These values can be extrapolated to estimate a peak Afrho value at perihelion of 3824 cm. The images were obtained using a 0.5-meter f/8.1 Ritchey-Chretien telescope located in Mayhill, New Mexico. Abstract Copyright The Meteoritical Society, 2013. JF - Meteoritics & Planetary Science AU - Blaauw, Rhiannon C AU - Suggs, Robert M AU - Cooke, William J Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 45 EP - 51 PB - Meteoritical Society, Fayetteville, AR VL - 49 IS - 1 SN - 1086-9379, 1086-9379 KW - telescope methods KW - parent bodies KW - apparent magnitude KW - production KW - observations KW - Jupiter family comets KW - photometry KW - cosmic dust KW - comets KW - meteor showers KW - Draconids KW - absolute magnitude KW - temporal distribution KW - Giacobini-Zinner Comet KW - cometary dust KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520105134?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info: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=Dust+production+of+comet+21P%2FGiacobini-Zinner+using+broadband+photometry&rft.au=Blaauw%2C+Rhiannon+C%3BSuggs%2C+Robert+M%3BCooke%2C+William+J&rft.aulast=Blaauw&rft.aufirst=Rhiannon&rft.date=2014-01-01&rft.volume=49&rft.issue=1&rft.spage=45&rft.isbn=&rft.btitle=&rft.title=Meteoritics+%26+Planetary+Science&rft.issn=10869379&rft_id=info:doi/10.1111%2Fmaps.12115 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 - 22 N1 - PubXState - AR N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-05-01 N1 - CODEN - MERTAW N1 - SubjectsTermNotLitGenreText - absolute magnitude; apparent magnitude; cometary dust; comets; cosmic dust; Draconids; Giacobini-Zinner Comet; Jupiter family comets; meteor showers; observations; parent bodies; photometry; production; telescope methods; temporal distribution DO - http://dx.doi.org/10.1111/maps.12115 ER - TY - JOUR T1 - MLS and CALIOP Cloud Ice Measurements in the Upper Troposphere: A Constraint from Microwave on Cloud Microphysics AN - 1496887350; 19024024 AB - This study examines the consistency and microphysics assumptions among satellite ice water content (IWC) retrievals in the upper troposphere with collocated A-Train radiances from Microwave Limb Sounder (MLS) and lidar backscatters from CloudAerosol Lidar with Orthogonal Polarization (CALIOP). For the cases in which IWC values are small (<10 mg m3), the cloud ice retrievals are constrained by both MLS 240- and 640-GHz radiances and CALIOP 532-nm backscatter 532. From the observed relationships between MLS cloud-induced radiance Tcir and the CALIOP backscatter integrated 532 along the MLS line of sight, an empirical linear relation between cloud ice and the lidar backscatter is found: IWC/532 = 0.58 - 0.11. This lidar cloud ice relation is required to satisfy the cloud ice emission signals simultaneously observed at microwave frequencies, in which ice permittivity is relatively well known. This empirical relationship also produces IWC values that agree well with the CALIOP, version 3.0, retrieval at values <10 mg m3. Because the microphysics assumption is critical in satellite cloud ice retrievals, the agreement found in the IWC532 relationships increase fidelity of the assumptions used by the lidar and microwave techniques for upper-tropospheric clouds. JF - Journal of Applied Meteorology and Climatology AU - Wu, Dong L AU - Lambert, Alyn AU - Read, William G AU - Eriksson, Patrick AU - Gong, Jie AD - NASA Goddard Space Flight Center, Greenbelt, Maryland Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 157 EP - 165 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 53 IS - 1 SN - 1558-8424, 1558-8424 KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Backscatter KW - Troposphere KW - Satellite instrumentation KW - Polarization KW - Clouds KW - Radiance KW - Microwaves KW - Lidar applications KW - Lidar backscatter KW - Climatology KW - Microwave techniques KW - LIDAR KW - Cloud microphysics KW - Q2 09150:Ice KW - M2 551.576:Clouds (551.576) KW - AQ 00005:Underground Services and Water Use KW - SW 0820:Snow, ice and frost UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1496887350?accountid=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+Applied+Meteorology+and+Climatology&rft.atitle=MLS+and+CALIOP+Cloud+Ice+Measurements+in+the+Upper+Troposphere%3A+A+Constraint+from+Microwave+on+Cloud+Microphysics&rft.au=Wu%2C+Dong+L%3BLambert%2C+Alyn%3BRead%2C+William+G%3BEriksson%2C+Patrick%3BGong%2C+Jie&rft.aulast=Wu&rft.aufirst=Dong&rft.date=2014-01-01&rft.volume=53&rft.issue=1&rft.spage=157&rft.isbn=&rft.btitle=&rft.title=Journal+of+Applied+Meteorology+and+Climatology&rft.issn=15588424&rft_id=info:doi/10.1175%2FJAMC-D-13-041.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 26 N1 - Last updated - 2016-04-29 N1 - SubjectsTermNotLitGenreText - Radiance; Microwaves; Backscatter; Troposphere; Climatology; Polarization; LIDAR; Clouds; Lidar backscatter; Lidar applications; Microwave techniques; Satellite instrumentation; Cloud microphysics DO - http://dx.doi.org/10.1175/JAMC-D-13-041.1 ER - TY - JOUR T1 - Pan-Continental Droughts in North America over the Last Millennium* AN - 1496884505; 19002772 AB - Regional droughts are common in North America, but pan-continental droughts extending across multiple regions, including the 2012 event, are rare relative to single-region events. Here, the tree-ring-derived North American Drought Atlas is used to investigate drought variability in four regions over the last millennium, focusing on pan-continental droughts. During the Medieval Climate Anomaly (MCA), the central plains (CP), Southwest (SW), and Southeast (SE) regions experienced drier conditions and increased occurrence of droughts and the Northwest (NW) experienced several extended pluvials. Enhanced MCA aridity in the SW and CP manifested as multidecadal megadroughts. Notably, megadroughts in these regions differed in their timing and persistence, suggesting that they represent regional events influenced by local dynamics rather than a unified, continental-scale phenomena. There is no trend in pan-continental drought occurrence, defined as synchronous droughts in three or more regions. SW, CP, and SE (SW+CP+SE) droughts are the most common, occurring in 12% of all years and peaking in prevalence during the twelfth and thirteenth centuries; patterns involving three other regions occur in about 8% of years. Positive values of the Southern Oscillation index (La Nina conditions) are linked to SW, CP, and SE (SW+CP+SE) droughts and SW, CP, and NW (SW+CP+NW) droughts, whereas CP, NW, and SE (CP+NW+SE) droughts are associated with positive values of the Pacific decadal oscillation and Atlantic multidecadal oscillation. While relatively rare, pan-continental droughts are present in the paleo record and are linked to defined modes of climate variability, implying the potential for seasonal predictability. Assuming stable drought teleconnections, these events will remain an important feature of future North American hydroclimate, possibly increasing in their severity in step with other expected hydroclimate responses to increased greenhouse gas forcing. JF - Journal of Climate AU - Cook, Benjamin I AU - Smerdon, Jason E AU - Seager, Richard AU - Cook, Edward R AD - NASA Goddard Institute for Space Studies, New York, and Lamont-Doherty Earth Observatory, Palisades, New York Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 383 EP - 397 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 27 IS - 1 SN - 0894-8755, 0894-8755 KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Variability KW - Dendroclimatology KW - Palaeo studies KW - La Nina KW - Climate change KW - Drought KW - IS, Pacific KW - Paleoclimates KW - Predictability KW - Climatic variability KW - Hydroclimate KW - Ocean-atmosphere system KW - Tree ring analysis KW - Aridity KW - Droughts KW - Teleconnections KW - Timing KW - Marine KW - North America KW - Climates KW - Greenhouse effect KW - Palaeoclimate KW - Pacific Decadal Oscillation KW - A, Atlantic KW - Southern Oscillation KW - Southern Oscillation Index KW - Greenhouse gases KW - AQ 00001:Water Resources and Supplies KW - Q2 09148:Palaeo-studies KW - SW 5010:Network design KW - M2 551.583:Variations (551.583) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1496884505?accountid=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=Pan-Continental+Droughts+in+North+America+over+the+Last+Millennium*&rft.au=Cook%2C+Benjamin+I%3BSmerdon%2C+Jason+E%3BSeager%2C+Richard%3BCook%2C+Edward+R&rft.aulast=Cook&rft.aufirst=Benjamin&rft.date=2014-01-01&rft.volume=27&rft.issue=1&rft.spage=383&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-13-00100.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 74 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Palaeo studies; Climate change; Hydroclimate; Ocean-atmosphere system; Greenhouse effect; Palaeoclimate; Droughts; Southern Oscillation; Teleconnections; Dendroclimatology; Climatic variability; Predictability; La Nina; Southern Oscillation Index; Drought; Aridity; Pacific Decadal Oscillation; Tree ring analysis; Greenhouse gases; Paleoclimates; Timing; Variability; Climates; North America; IS, Pacific; A, Atlantic; Marine DO - http://dx.doi.org/10.1175/JCLI-D-13-00100.1 ER - TY - JOUR T1 - Reactivation of hepatitis B virus infection following ruxolitinib treatment in a patient with myelofibrosis AN - 1475125161; 23929216 JF - Leukemia AU - Caocci, G AU - Murgia, F AU - Podda, L AU - Solinas, A AU - Atzeni, S AU - La Nasa, G Y1 - 2014/01// PY - 2014 DA - Jan 2014 SP - 225 EP - 7 CY - London PB - Nature Publishing Group VL - 28 IS - 1 SN - 08876924 KW - Medical Sciences--Oncology KW - INCB018424 KW - Pyrazoles KW - Janus Kinases KW - Janus Kinases -- antagonists & inhibitors KW - Humans KW - Hepatitis B -- complications KW - Pyrazoles -- therapeutic use KW - Virus Activation KW - Primary Myelofibrosis -- complications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475125161?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthcompleteshell&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Leukemia&rft.atitle=Reactivation+of+hepatitis+B+virus+infection+following+ruxolitinib+treatment+in+a+patient+with+myelofibrosis&rft.au=Caocci%2C+G%3BMurgia%2C+F%3BPodda%2C+L%3BSolinas%2C+A%3BAtzeni%2C+S%3BLa+Nasa%2C+G&rft.aulast=Caocci&rft.aufirst=G&rft.date=2014-01-01&rft.volume=28&rft.issue=1&rft.spage=225&rft.isbn=&rft.btitle=&rft.title=Leukemia&rft.issn=08876924&rft_id=info:doi/10.1038%2Fleu.2013.235 LA - English DB - ProQuest Central N1 - Copyright - Copyright Nature Publishing Group Jan 2014 N1 - Last updated - 2014-03-25 DO - http://dx.doi.org/10.1038/leu.2013.235 ER -