USAP-DC

{"dp_type": "Dataset", "free_text": "Ice Sheet Model"}

[{"awards": "1744771 Balco, Gregory", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 02 Sep 2022 00:00:00 GMT", "description": "This dataset is a NetCDF file containing the results of a 5 MA ice sheet model run with parameter settings intended to enhance marine ice sheet instability processes. Uses the Penn State ice sheet model as described in DeConto et al. (2021) and Pollard \u0026 DeConto (2012). The model runs from 5 Ma to present and snapshots are recorded every 2000 years. Model grid resolution is 40 km. Only the model geometry (thickness, height, whether grounded) is saved in each snapshot. The purpose of the model run was to support a study into whether or not it is possible to distinguish models with different marine ice sheet instability parameterizations using geologic data. \r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Modeling; Marine Ice Margin Instability; Model Output", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Balco, Gregory; Buchband, Hannah; Halberstadt, Anna Ruth", "project_titles": "Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogenic-Nuclide Measurements", "projects": [{"proj_uid": "p0010342", "repository": "USAP-DC", "title": "Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogenic-Nuclide Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "5 million year transient Antarctic ice sheet model run with \"sensitized\" marine ice margin instabilities", "uid": "601602", "west": -180.0}, {"awards": "1744771 Balco, Gregory", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 02 Sep 2022 00:00:00 GMT", "description": "This dataset is a NetCDF file containing the results of a 5 MA ice sheet model run with parameter settings intended to suppress marine ice sheet instability processes. Uses the Penn State ice sheet model as described in DeConto et al. (2021) and Pollard \u0026 DeConto (2012). The model runs from 5 Ma to present and snapshots are recorded every 2000 years. Model grid resolution is 40 km. Only the model geometry (thickness, height, whether grounded) is saved in each snapshot. The purpose of the model run was to support a study into whether or not it is possible to distinguish models with different marine ice sheet instability parameterizations using geologic data. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Modeling; Marine Ice Margin Instability; Model Output", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Balco, Gregory; Buchband, Hannah; Halberstadt, Anna Ruth", "project_titles": "Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogenic-Nuclide Measurements", "projects": [{"proj_uid": "p0010342", "repository": "USAP-DC", "title": "Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogenic-Nuclide Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "5 million year transient Antarctic ice sheet model run with \"desensitized\" marine ice margin instabilities", "uid": "601601", "west": -180.0}, {"awards": "1644277 Aschwanden, Andy", "bounds_geometry": null, "date_created": "Thu, 14 Jul 2022 00:00:00 GMT", "description": "The Parallel Ice Sheet Model (PISM) is an open-source ice sheet model distributed under GPL-3.0. This version includes the orographic precipitation module and other improvements produced under NSF award 1644277.", "east": null, "geometry": null, "keywords": "Antarctica", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aschwanden, Andy", "project_titles": "Collaborative Research: Feedbacks between Orographic Precipitation and Ice Dynamics", "projects": [{"proj_uid": "p0010348", "repository": "USAP-DC", "title": "Collaborative Research: Feedbacks between Orographic Precipitation and Ice Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Parallel Ice Sheet Model (PISM) v2", "uid": "601589", "west": null}, {"awards": "1443347 Condron, Alan", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 08 Jun 2021 00:00:00 GMT", "description": "Meltwater and ice discharge from a retreating Antarctic Ice Sheet could have important impacts on future global climate. This dataset contains the results from multi-century (present\u20132250) climate simulations performed using a coupled numerical model integrated under future greenhouse-gas emission scenarios IPCC RCP4.5 and RCP8.5, with meltwater and ice discharge provided by a dynamic-thermodynamic ice sheet model. These results were published in Sadai et al., Science Advances, 2020, Vol. 6, eaaz1169\r\n\r\nPlease note that ALL the raw model data generated for this project is archived at Woods Hole Oceanographic Institution and the University of Massachusetts Amherst and freely available on request. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Meltwater", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Integrated System Science", "persons": "Condron, Alan", "project_titles": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet", "projects": [{"proj_uid": "p0010007", "repository": "USAP-DC", "title": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming", "uid": "601449", "west": -180.0}, {"awards": "1745137 Schroeder, Dustin", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 02 Oct 2019 00:00:00 GMT", "description": "These data accompany the paper \"Antarctic Topographic Realizations and Geostatistical Modeling Used to Map Subglacial Lakes\" (MacKie et al., in review). This dataset contains 100 geostatistically generated subglacial topographic realizations for Antarctica. Data science techniques were used to calculate the probability of the occurrence of radar-detected lakes and altimetry-detected (active) lakes across the continent, using each topographic realization as a parameter. This generated 100 probability maps of the likelihood of radar-detected lake occurrence and 100 probability maps of active lake occurrence. Further statistics were used to generate 100 binary maps showing expected radar-detected lake locations. The ensemble of realizations can be used for uncertainty quantification.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Active Lakes; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; Model Data; Snow/ice; Snow/Ice; Subglacial Lakes; Topography", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacKie, Emma; Schroeder, Dustin; Caers, Jef; Siegfried, Matt; Scheidt, Celine", "project_titles": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations", "projects": [{"proj_uid": "p0010058", "repository": "USAP-DC", "title": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic topographic and subglacial lake geostatistical simulations", "uid": "601213", "west": -180.0}, {"awards": "1443394 Pollard, David", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Mon, 04 Feb 2019 00:00:00 GMT", "description": "The dataset consists of two tar files for two distinct sets of simulations. Each tar file contains a number of Netcdf files with model output for one simulation each, and also contains a DIF file (Directory Interchange Format, in xml form) with information on that part of the dataset.\r\n\r\nSet 1:\r\n\r\nThere are 4 Netcdf files with output from the PSU 3D Antarctic ice sheet model including \r\n ice melange, showing role of melange in potentially providing buttressing and \r\n possibly slowing down ice retreat in strong climate warming scenarios.\r\n \r\nSet two:\r\n\r\nThere are 2 Netcdf files with output from the PSU 3D Antarctic ice sheet model, for two future warming scenarios RCP4.5 and RCP8.5, contributing to oceanic meltwater discharge fields for future climate and ocean model simulations performed at Univ. Massachusetts by other PIs on the NSF project.\r\n \r\nMore details on file names and model fields is provided in \"Data Section\" of the Readme file.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctic; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Ice Sheet Model; Meltwater; Model Data; Modeling; Model Output", "locations": "Antarctica; Antarctic", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Pollard, David", "project_titles": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet", "projects": [{"proj_uid": "p0010007", "repository": "USAP-DC", "title": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Ice Sheet simulations for role of freshwater in future warming scenarios", "uid": "601154", "west": -180.0}, {"awards": "1245899 Kowalewski, Douglas", "bounds_geometry": ["POLYGON((160 -70,168 -70,176 -70,184 -70,192 -70,200 -70,208 -70,216 -70,224 -70,232 -70,240 -70,240 -71.5,240 -73,240 -74.5,240 -76,240 -77.5,240 -79,240 -80.5,240 -82,240 -83.5,240 -85,232 -85,224 -85,216 -85,208 -85,200 -85,192 -85,184 -85,176 -85,168 -85,160 -85,160 -83.5,160 -82,160 -80.5,160 -79,160 -77.5,160 -76,160 -74.5,160 -73,160 -71.5,160 -70))"], "date_created": "Tue, 16 Jan 2018 00:00:00 GMT", "description": "Data here is output from regional climate modeling to shed light on the range of possible environmental conditions in the McMurdo region during periods of grounded ice expansion and recession during the Plio-Pleistocene.", "east": 240.0, "geometry": ["POINT(-160 -77.5)"], "keywords": "Antarctica; Climate Model; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; McMurdo; Paleoclimate; Ross Sea", "locations": "Ross Sea; McMurdo; Antarctica", "north": -70.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Kowalewski, Douglas", "project_titles": "Collaborative Research: West Antarctic Ice Sheet stability, Alpine Glaciation, and Climate Variability: a Terrestrial Perspective from Cosmogenic-nuclide Dating in McMurdo Sound", "projects": [{"proj_uid": "p0000391", "repository": "USAP-DC", "title": "Collaborative Research: West Antarctic Ice Sheet stability, Alpine Glaciation, and Climate Variability: a Terrestrial Perspective from Cosmogenic-nuclide Dating in McMurdo Sound"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Region Climate Model Output Plio-Pleistocene", "uid": "601080", "west": 160.0}, {"awards": "1043018 Pollard, David", "bounds_geometry": ["POINT(-85 -82)"], "date_created": "Thu, 03 Dec 2015 00:00:00 GMT", "description": "Ice-sheet model output of Antarctic Ice Sheet simulations spanning 30,000 years BP to 5000+ years in the future.", "east": -85.0, "geometry": ["POINT(-85 -82)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model", "locations": "Antarctica", "north": -82.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Pollard, David", "project_titles": "Collaborative Research: A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea", "projects": [{"proj_uid": "p0000194", "repository": "USAP-DC", "title": "Collaborative Research: A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.0, "title": "Ice Sheet Model Output, West Antarctic Ice Sheet Deglaciation", "uid": "609639", "west": -85.0}, {"awards": "0934534 Sergienko, Olga", "bounds_geometry": ["POLYGON((-75 84,-69.5 84,-64 84,-58.5 84,-53 84,-47.5 84,-42 84,-36.5 84,-31 84,-25.5 84,-20 84,-20 81.6,-20 79.2,-20 76.8,-20 74.4,-20 72,-20 69.6,-20 67.2,-20 64.8,-20 62.4,-20 60,-25.5 60,-31 60,-36.5 60,-42 60,-47.5 60,-53 60,-58.5 60,-64 60,-69.5 60,-75 60,-75 62.4,-75 64.8,-75 67.2,-75 69.6,-75 72,-75 74.4,-75 76.8,-75 79.2,-75 81.6,-75 84))", "POLYGON((-150 -75,-129 -75,-108 -75,-87 -75,-66 -75,-45 -75,-24 -75,-3 -75,18 -75,39 -75,60 -75,60 -76.5,60 -78,60 -79.5,60 -81,60 -82.5,60 -84,60 -85.5,60 -87,60 -88.5,60 -90,39 -90,18 -90,-3 -90,-24 -90,-45 -90,-66 -90,-87 -90,-108 -90,-129 -90,-150 -90,-150 -88.5,-150 -87,-150 -85.5,-150 -84,-150 -82.5,-150 -81,-150 -79.5,-150 -78,-150 -76.5,-150 -75))"], "date_created": "Tue, 07 Jul 2015 00:00:00 GMT", "description": "This data set includes basal shear distributions inferred from surface observations - surface ice velocities (Joughin et al., 2010, Rignot et al., 2011), bed and surface elevations (Fretwell et al., 2013) under ten selected locations in Greenland and Antarctica. In Greenland, the locations were: 79\u00b0 North and Zachariae Glaciers, Jakobshan Isbrae, North East Greenland Ice Stream, Petermann Glacier. The Antarctica locations were Bindschadler Ice Stream, Lambert Ice Stream, MacAyeal Ice Stream, Pine Island Glacier, Thwaites Glacier, and an unnamed location around ~40\u00b0 E 84\u00b0 S.", "east": 60.0, "geometry": ["POINT(-47.5 72)", "POINT(-45 -82.5)"], "keywords": "Antarctica; Arctic; Bindschadler Ice Stream; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Greenland; Lambert Ice Stream; Macayeal Ice Stream; Pine Island Glacier; Thwaites Glacier", "locations": "Thwaites Glacier; Arctic; Lambert Ice Stream; Pine Island Glacier; Macayeal Ice Stream; Greenland; Bindschadler Ice Stream; Antarctica", "north": 84.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sergienko, Olga", "project_titles": "COLLABORATIVE RESEARCH: Enabling ice sheet sensitivity and stability analysis with a large-scale higher-order ice sheet model\u0027s adjoint to support sea level change assessment", "projects": [{"proj_uid": "p0000048", "repository": "USAP-DC", "title": "COLLABORATIVE RESEARCH: Enabling ice sheet sensitivity and stability analysis with a large-scale higher-order ice sheet model\u0027s adjoint to support sea level change assessment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Inverted Basal Shear Stress of Antarctic and Greenland Ice Streams and Glaciers", "uid": "609626", "west": -150.0}, {"awards": "0632198 Anandakrishnan, Sridhar; 0758274 Parizek, Byron; 0732844 Anandakrishnan, Sridhar", "bounds_geometry": ["POLYGON((-110.06 -74.05,-109.582 -74.05,-109.104 -74.05,-108.626 -74.05,-108.148 -74.05,-107.67 -74.05,-107.192 -74.05,-106.714 -74.05,-106.236 -74.05,-105.758 -74.05,-105.28 -74.05,-105.28 -74.31,-105.28 -74.57,-105.28 -74.83,-105.28 -75.09,-105.28 -75.35,-105.28 -75.61,-105.28 -75.87,-105.28 -76.13,-105.28 -76.39,-105.28 -76.65,-105.758 -76.65,-106.236 -76.65,-106.714 -76.65,-107.192 -76.65,-107.67 -76.65,-108.148 -76.65,-108.626 -76.65,-109.104 -76.65,-109.582 -76.65,-110.06 -76.65,-110.06 -76.39,-110.06 -76.13,-110.06 -75.87,-110.06 -75.61,-110.06 -75.35,-110.06 -75.09,-110.06 -74.83,-110.06 -74.57,-110.06 -74.31,-110.06 -74.05))"], "date_created": "Mon, 03 Nov 2014 00:00:00 GMT", "description": "This data set consists of experimental output from a higher-order finite-element model that was utilized in conjunction with existing data sets to isolate essential physical processes affecting Thwaites Glacier (TG) in the Amundsen Sea Embayment (ASE) of West Antarctica.", "east": -105.28, "geometry": ["POINT(-107.67 -75.35)"], "keywords": "Amundsen Sea; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; Thwaites Glacier", "locations": "Amundsen Sea; Thwaites Glacier; Antarctica", "north": -74.05, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Parizek, Byron R.; Blankenship, Donald D.; Dupont, Todd K.; Holt, John W.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System; IPY: Flow Dynamics of the Amundsen Sea Glaciers: Thwaites and Pine Island.", "projects": [{"proj_uid": "p0000699", "repository": "USAP-DC", "title": "IPY: Flow Dynamics of the Amundsen Sea Glaciers: Thwaites and Pine Island."}, {"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.65, "title": "Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "uid": "609619", "west": -110.06}, {"awards": "0838811 Sergienko, Olga", "bounds_geometry": ["POINT(0 -78)"], "date_created": "Mon, 14 Apr 2014 00:00:00 GMT", "description": "This data set consists of outputs of several numerical models simulating ice stream flow over undulated bed, interaction of ice stream flow, and subglacial and supraglacial hydraulic systems. All simulations are performed for idealized geometries using finite-element models.", "east": 0.0, "geometry": ["POINT(0 -78)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; Ice Thickness; Ice Velocity", "locations": "Antarctica", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sergienko, Olga", "project_titles": "Model Investigation of Ice Stream/Subglacial Lake Systems", "projects": [{"proj_uid": "p0000045", "repository": "USAP-DC", "title": "Model Investigation of Ice Stream/Subglacial Lake Systems"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Interaction of Ice Stream Flow with Heterogeneous Beds", "uid": "609583", "west": 0.0}, {"awards": "0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((-125 -73,-121.5 -73,-118 -73,-114.5 -73,-111 -73,-107.5 -73,-104 -73,-100.5 -73,-97 -73,-93.5 -73,-90 -73,-90 -74,-90 -75,-90 -76,-90 -77,-90 -78,-90 -79,-90 -80,-90 -81,-90 -82,-90 -83,-93.5 -83,-97 -83,-100.5 -83,-104 -83,-107.5 -83,-111 -83,-114.5 -83,-118 -83,-121.5 -83,-125 -83,-125 -82,-125 -81,-125 -80,-125 -79,-125 -78,-125 -77,-125 -76,-125 -75,-125 -74,-125 -73))"], "date_created": "Thu, 03 May 2012 00:00:00 GMT", "description": "This data set contains line-based radar-derived ice thickness and bed elevation data, collected as part of the Airborne Geophysical Survey of the Amundsen Embayment (AGASEA) expedition, which took place over Thwaites Glacier in West Antarctica from 2004 to 2005. The data set includes ice thickness, ice sheet bed elevation, and ice sheet surface elevation, derived from ice-penetrating radar and aircraft GPS positions. The data are spaced on a 15 km by 15 km grid over the entire catchment of the glacier, and sampled at approximately 15 meters along track. Most of the radar data used for this dataset has been processed using a 1-D focusing algorithm, to reduce the along track resolution to tens of meters, to improve boundary conditions for ice sheet models. \n\nData are available via FTP in space-delimited ASCII format.", "east": -90.0, "geometry": ["POINT(-107.5 -78)"], "keywords": "AGASEA; Airborne Radar; Amundsen Sea; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness", "locations": "Antarctica; Amundsen Sea", "north": -73.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Young, Duncan A.; Holt, John W.; Kempf, Scott D.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.0, "title": "AGASEA Ice Thickness Profile Data from the Amundsen Sea Embayment, Antarctica", "uid": "609517", "west": -125.0}, {"awards": "0739781 Blythe, Ann", "bounds_geometry": ["POLYGON((155.77667 -79.793335,156.208836 -79.793335,156.641002 -79.793335,157.073168 -79.793335,157.505334 -79.793335,157.9375 -79.793335,158.369666 -79.793335,158.801832 -79.793335,159.233998 -79.793335,159.666164 -79.793335,160.09833 -79.793335,160.09833 -79.8578345,160.09833 -79.922334,160.09833 -79.9868335,160.09833 -80.051333,160.09833 -80.1158325,160.09833 -80.180332,160.09833 -80.2448315,160.09833 -80.309331,160.09833 -80.3738305,160.09833 -80.43833,159.666164 -80.43833,159.233998 -80.43833,158.801832 -80.43833,158.369666 -80.43833,157.9375 -80.43833,157.505334 -80.43833,157.073168 -80.43833,156.641002 -80.43833,156.208836 -80.43833,155.77667 -80.43833,155.77667 -80.3738305,155.77667 -80.309331,155.77667 -80.2448315,155.77667 -80.180332,155.77667 -80.1158325,155.77667 -80.051333,155.77667 -79.9868335,155.77667 -79.922334,155.77667 -79.8578345,155.77667 -79.793335))"], "date_created": "Sun, 01 Jan 2012 00:00:00 GMT", "description": "This project studies formation of the TransAntarctic Mountains (TAM) through numerical modeling based on cooling histories of apatite mineral grains. The TAM are the highest and longest rift-related mountain range in the world. Various models for their uplift have been proposed, the most provocative of which is that they are not uplifted, but instead are the eroded remnant of a plateau. This project evaluates that hypothesis by collecting apatites from around Byrd Glacier for fission track thermochronology. Results will be combined with a kinematic and thermal model to determine the TAM\u0027s structural evolution. The plateau model, if correct, implies that the Byrd Glacier originated not as a glacier-carved valley through the TAM, but as a river system flowing in the opposite direction. Given that the Byrd Glacier is a key drainage for the East Antarctic ice sheet, this result has important implications for ice sheet models and interpretation of both regional geology and sediment records. The main broader impacts are undergraduate research and a new collaboration between a primarily undergraduate and a research institution. Students will be involved in the field program, sample analyses, and numerical modeling.", "east": 160.09833, "geometry": ["POINT(157.9375 -80.1158325)"], "keywords": "Antarctica; Fission Track Thermochronology; Geochemistry; Solid Earth; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -79.793335, "nsf_funding_programs": null, "persons": "Blythe, Ann Elizabeth; Huerta, Audrey D.", "project_titles": "Collaborative Research: Thermochronologic and modelling test for a Mesozoic West Antarctic Plateau", "projects": [{"proj_uid": "p0000677", "repository": "USAP-DC", "title": "Collaborative Research: Thermochronologic and modelling test for a Mesozoic West Antarctic Plateau"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.43833, "title": "Thermochronologic and modelling test for a Mesozoic West Antarctic Plateau", "uid": "600082", "west": 155.77667}, {"awards": "0632168 Hulbe, Christina", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Sat, 30 May 2009 00:00:00 GMT", "description": "This data set provides the results of predictive modeling experiments on the Amundsen Sea Embayment region of Antarctica. The models examine how interactions between basal processes and ice sheet dynamics can result in abrupt reconfigurations of ice-sheets, and how those reconfigurations impact other Earth systems. The models were developed by a collaborative effort called the Community Ice Sheet Model (CISM).\n\nThe data set contains a MATLAB (.mat) native format file with time evolution of basal temperature fields from a generic ice sheet model with uniform and non-uniform heat flux, a MATLAB script for performing singular value decomposition and analysis of the model fields, and a summary of experimental results in Portable Document Format (.pdf). Data are available via FTP.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Community Ice Sheet Model; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina; Daescu, Dacian N.", "project_titles": "Collaborative Research: IPY, The Next Generation: A Community Ice Sheet Model for Scientists and Educators With Demonstration Experiments in Amundsen Sea Embayment Region", "projects": [{"proj_uid": "p0000756", "repository": "USAP-DC", "title": "Collaborative Research: IPY, The Next Generation: A Community Ice Sheet Model for Scientists and Educators With Demonstration Experiments in Amundsen Sea Embayment Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Singular Value Decomposition Analysis of Ice Sheet Model Output Fields", "uid": "609396", "west": -180.0}]

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