USAP-DC

{"dp_type": "Dataset", "free_text": "Ice Shelf"}

[{"awards": "1443677 Padman, Laurence; 9896041 Padman, Laurence", "bounds_geometry": ["POLYGON((-180 -40.231,-144 -40.231,-108 -40.231,-72 -40.231,-36 -40.231,0 -40.231,36 -40.231,72 -40.231,108 -40.231,144 -40.231,180 -40.231,180 -45.2079,180 -50.1848,180 -55.161699999999996,180 -60.1386,180 -65.1155,180 -70.0924,180 -75.0693,180 -80.0462,180 -85.0231,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85.0231,-180 -80.0462,-180 -75.0693,-180 -70.0924,-180 -65.1155,-180 -60.138600000000004,-180 -55.1617,-180 -50.1848,-180 -45.2079,-180 -40.231))"], "date_created": "Wed, 27 Mar 2024 00:00:00 GMT", "description": "CATS2008_v2023 is an update of the original CATS2008 tide model (Howard et al., 2019 [https://doi.org/10.15784/601235]; Padman et al., 2002 [https://doi.org/10.3189/172756402781817752]). It introduces a new model file format, increased resolution, more accurate coastlines, and a simple scaling for ice shelf flexure near grounding lines. The changes included in the new CATS2008_v2023 model are: (1) The CATS2008 model has been interpolated to a finer grid (2 km for CATS2008_v2023 vs 4 km for CATS2008) to provide a better representation of coastlines and ice shelf grounding lines. (2) Coastlines have been adjusted to match BedMachine Antarctica v3 (Morlighem et al., 2020 [https://doi.org/10.1038/s41561-019-0510-8]; Morlighem, 2022 [https://doi.org/10.5067/FPSU0V1MWUB6]). Areas that were previously grounded and had no tidal constituent data in CATS2008 have been filled using MATLAB\u0027s \u2018regionfill\u2019 function, applied to the real and imaginary components of tidal constituents individually. An ocean mask matching BedMachine Antarctica v3 is provided in the model file to mask out grounded areas. (3) Water depth (water column thickness under ice shelves) has been adjusted to match BedMachine Antarctica v3. (4) An ice shelf flexure model has been included for estimating tidal deflections in grounding zones. Flexure is approximated by a forward 1D linear elastic model applied to BedMachine Antarctica v3 ice geometry, with elastic modulus E=4.8 GPa and Poisson\u0027s ratio nu=0.4. The ice flexure can be included as an option when using TMD3.0 (Greene et al., 2024 [https://doi.org/10.21105/joss.06018]) and pyTMD (Sutterley, 2024 [https://doi.org/10.5281/zenodo.10501349]) software packages. (5) The model is provided as a consolidated NetCDF file that can be used with TMD3.0 and pyTMD, but not with earlier TMD versions. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cryosphere; Inverse Modeling; Model Data; Ocean Currents; Oceans; Sea Surface; Southern Ocean; Tide Model; Tides", "locations": "Antarctica; Sea Surface; Southern Ocean", "north": -40.231, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Howard, Susan L.; Greene, Chad A.; Padman, Laurence; Erofeeva, Svetlana; Sutterley, Tyler", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE); Ocean Tides around Antarctica and in the Southern Ocean", "projects": [{"proj_uid": "p0010116", "repository": "USAP-DC", "title": "Ocean Tides around Antarctica and in the Southern Ocean"}, {"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "CATS2008_v2023: Circum-Antarctic Tidal Simulation 2008, version 2023", "uid": "601772", "west": -180.0}, {"awards": "1841467 MacAyeal, Douglas; 1841607 Banwell, Alison", "bounds_geometry": ["POLYGON((-68.28 -71.1,-68.202 -71.1,-68.124 -71.1,-68.046 -71.1,-67.968 -71.1,-67.89 -71.1,-67.812 -71.1,-67.734 -71.1,-67.656 -71.1,-67.578 -71.1,-67.5 -71.1,-67.5 -71.14999999999999,-67.5 -71.19999999999999,-67.5 -71.25,-67.5 -71.3,-67.5 -71.35,-67.5 -71.39999999999999,-67.5 -71.44999999999999,-67.5 -71.5,-67.5 -71.55,-67.5 -71.6,-67.578 -71.6,-67.656 -71.6,-67.734 -71.6,-67.812 -71.6,-67.89 -71.6,-67.968 -71.6,-68.046 -71.6,-68.124 -71.6,-68.202 -71.6,-68.28 -71.6,-68.28 -71.55,-68.28 -71.5,-68.28 -71.44999999999999,-68.28 -71.39999999999999,-68.28 -71.35,-68.28 -71.3,-68.28 -71.25,-68.28 -71.19999999999999,-68.28 -71.14999999999999,-68.28 -71.1))"], "date_created": "Wed, 20 Mar 2024 00:00:00 GMT", "description": "This dataset contains all of the field data (GNSS, weather station data, timelapse camera images) used in the publication \u0027Banwell et al., 2024\u0027, which documents observations of surface meltwater-induced flexure and fracture at a doline on north George VI Ice Shelf, Antarctic Peninsula. ", "east": -67.5, "geometry": ["POINT(-67.89 -71.35)"], "keywords": "Antarctica; Antarctic Peninsula; AWS; Cryosphere; GNSS; GPS Data; Ice-Shelf Flexure; Ice Shelf Fracture; Ice-Shelf Melt; Timelaps Images", "locations": "Antarctic Peninsula; Antarctica", "north": -71.1, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Banwell, Alison; Willis, Ian; Stevens, Laura; Dell, Rebecca; MacAyeal, Douglas", "project_titles": "NSFGEO-NERC: Ice-shelf Instability Caused by Active Surface Meltwater Production, Movement, Ponding and Hydrofracture", "projects": [{"proj_uid": "p0010449", "repository": "USAP-DC", "title": "NSFGEO-NERC: Ice-shelf Instability Caused by Active Surface Meltwater Production, Movement, Ponding and Hydrofracture"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.6, "title": "Dataset for: Banwell et al. 2024, \u0027Observed meltwater-induced flexure and fracture at a doline on George VI Ice Shelf, Antarctica\u0027, Journal of Glaciology.", "uid": "601771", "west": -68.28}, {"awards": "1149085 Bassis, Jeremy", "bounds_geometry": ["POLYGON((66 -68,66.9 -68,67.8 -68,68.7 -68,69.6 -68,70.5 -68,71.4 -68,72.3 -68,73.2 -68,74.1 -68,75 -68,75 -68.6,75 -69.2,75 -69.8,75 -70.4,75 -71,75 -71.6,75 -72.2,75 -72.8,75 -73.4,75 -74,74.1 -74,73.2 -74,72.3 -74,71.4 -74,70.5 -74,69.6 -74,68.7 -74,67.8 -74,66.9 -74,66 -74,66 -73.4,66 -72.8,66 -72.2,66 -71.6,66 -71,66 -70.4,66 -69.8,66 -69.2,66 -68.6,66 -68))"], "date_created": "Fri, 13 Oct 2023 00:00:00 GMT", "description": "This dataset contains a time series of rift length change for a set of 78 rifts in 13 ice shelves and a time series of rift lengths for 5 rifts in the Amery Ice Shelf for the period 2002-2015.\r\n(This dataset has been transfered from NSIDC (nsidc0652)", "east": 75.0, "geometry": ["POINT(70.5 -71)"], "keywords": "Amery Ice Shelf; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; MODIS", "locations": "Amery Ice Shelf; Antarctica; Amery Ice Shelf", "north": -68.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bassis, Jeremy; Walker, Catherine", "project_titles": "CAREER: Bound to Improve - Improved Estimates of the Glaciological Contribution to Sea Level Rise", "projects": [{"proj_uid": "p0010437", "repository": "USAP-DC", "title": "CAREER: Bound to Improve - Improved Estimates of the Glaciological Contribution to Sea Level Rise"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -74.0, "title": "Antarctic Ice Shelf Rift Propagation Rates", "uid": "601740", "west": 66.0}, {"awards": null, "bounds_geometry": ["POLYGON((-156 -82.5,-155.9 -82.5,-155.8 -82.5,-155.7 -82.5,-155.6 -82.5,-155.5 -82.5,-155.4 -82.5,-155.3 -82.5,-155.2 -82.5,-155.1 -82.5,-155 -82.5,-155 -82.53,-155 -82.56,-155 -82.59,-155 -82.62,-155 -82.65,-155 -82.67999999999999,-155 -82.71,-155 -82.74,-155 -82.77,-155 -82.8,-155.1 -82.8,-155.2 -82.8,-155.3 -82.8,-155.4 -82.8,-155.5 -82.8,-155.6 -82.8,-155.7 -82.8,-155.8 -82.8,-155.9 -82.8,-156 -82.8,-156 -82.77,-156 -82.74,-156 -82.71,-156 -82.67999999999999,-156 -82.65,-156 -82.62,-156 -82.59,-156 -82.56,-156 -82.53,-156 -82.5))"], "date_created": "Tue, 12 Sep 2023 00:00:00 GMT", "description": "Contained in this folder are the raw and processed data files for data collected with the underwater robot Icefin in the ocean cavity beneath Ross Ice Shelf, near the grounding line of Kamb Ice Stream. Most of these data are located within a basal crevasse. They were collected in December 2019 as part of the Aotearoa New Zealand Antarctic Science Platform and Victoria University of Wellington Hot Water Drilling initiative, and the NASA RISEUP grant (NNX16AL07G, PI B. E. Schmidt). The code that converted raw data files to processed can be found at https://zenodo.org/record/8338529. Direct questions to Peter Washam at pwasham@cornell.edu.", "east": -155.0, "geometry": ["POINT(-155.5 -82.65)"], "keywords": "Antarctica; Basal Crevassing; Basal Freezing; Basal Melting; Ice Shelf; Kamb Ice Stream; Oceanography", "locations": "Kamb Ice Stream; Antarctica", "north": -82.5, "nsf_funding_programs": null, "persons": "Washam, Peter", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -82.8, "title": "Direct observations of melting, freezing, and ocean circulation in an ice shelf basal crevasse", "uid": "601733", "west": -156.0}, {"awards": "2139002 Huth, Alexander", "bounds_geometry": ["POLYGON((-67 -66,-66.3 -66,-65.6 -66,-64.9 -66,-64.2 -66,-63.5 -66,-62.8 -66,-62.1 -66,-61.4 -66,-60.7 -66,-60 -66,-60 -66.4,-60 -66.8,-60 -67.2,-60 -67.6,-60 -68,-60 -68.4,-60 -68.8,-60 -69.2,-60 -69.6,-60 -70,-60.7 -70,-61.4 -70,-62.1 -70,-62.8 -70,-63.5 -70,-64.2 -70,-64.9 -70,-65.6 -70,-66.3 -70,-67 -70,-67 -69.6,-67 -69.2,-67 -68.8,-67 -68.4,-67 -68,-67 -67.6,-67 -67.2,-67 -66.8,-67 -66.4,-67 -66))"], "date_created": "Thu, 24 Aug 2023 00:00:00 GMT", "description": "This dataset contains a model (Elmer/Ice Fortran modules) to simulate rifting on ice shelves. The model combines the vertically integrated momentum balance and anisotropic continuum damage mechanics formulations. Additionally, it accounts for rift-flank boundary processes, including pressure on rift-flank walls from seawater, contact between flanks, and ice m\u00e9lange that may also transmit stress between flanks.\r\n\r\nThis dataset also contains the input data (Elmer restart files), input files (Elmer .sifs), and Slurm batch scripts to run five experiments. All experiments aim to simulate the final two years of rift propagation that led to the calving of tabular iceberg A68 from Larsen C ice shelf in 2017. However, each experiment differs in its treatment of rift-flank boundary processes, which affects the rift path.\r\n\r\nFor more information, see the associated publication (Huth et al., 2023).", "east": -60.0, "geometry": ["POINT(-63.5 -68)"], "keywords": "Antarctica; Glaciology; Iceberg; Ice Shelf Dynamics; Larsen C Ice Shelf; Model Data; Modeling", "locations": "Larsen C Ice Shelf; Antarctica", "north": -66.0, "nsf_funding_programs": "Post Doc/Travel", "persons": "Huth, Alexander", "project_titles": "OPP-PRF Calving, Icebergs, and Climate", "projects": [{"proj_uid": "p0010276", "repository": "USAP-DC", "title": "OPP-PRF Calving, Icebergs, and Climate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Simulations of ice-shelf rifting on Larsen C Ice Shelf", "uid": "601718", "west": -67.0}, {"awards": "1543445 Zhang, Jing", "bounds_geometry": ["POLYGON((-70.9 -65,-69.51 -65,-68.12 -65,-66.73 -65,-65.34 -65,-63.95 -65,-62.56 -65,-61.17 -65,-59.78 -65,-58.39 -65,-57 -65,-57 -65.5,-57 -66,-57 -66.5,-57 -67,-57 -67.5,-57 -68,-57 -68.5,-57 -69,-57 -69.5,-57 -70,-58.39 -70,-59.78 -70,-61.17 -70,-62.56 -70,-63.95 -70,-65.34 -70,-66.73 -70,-68.12 -70,-69.51 -70,-70.9 -70,-70.9 -69.5,-70.9 -69,-70.9 -68.5,-70.9 -68,-70.9 -67.5,-70.9 -67,-70.9 -66.5,-70.9 -66,-70.9 -65.5,-70.9 -65))"], "date_created": "Wed, 03 May 2023 00:00:00 GMT", "description": "This dataset includes the 3-km resolution budget terms of surface mass balance (SMB) and surface energy budget (SEB) for the Larsen C Ice Shelf during the melting season of 2017-18. The variables include the SMB budget terms of net surface mass balance, precipitation, runoff, blowing snow erosion, surface sublimation, and blowing snow sublimation, and the SEB budget terms of net surface energy budget, downwelling and upwelling longwave radiation, surface absorbed shortwave radiation, ground heat flux, and sensible / latent heat flux.", "east": -57.0, "geometry": ["POINT(-63.95 -67.5)"], "keywords": "Antarctica; Glaciology; Larsen C Ice Shelf; Model Data; Surface Energy Budget; Surface Mass Balance; WRF Model", "locations": "Antarctica; Larsen C Ice Shelf", "north": -65.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Zhang, Jing; Luo, Liping", "project_titles": "Collaborative Research: Present and Projected Future Forcings on Antarctic Peninsula Glaciers and Ice Shelves using the Weather Forecasting and Research (WRF) Model", "projects": [{"proj_uid": "p0010408", "repository": "USAP-DC", "title": "Collaborative Research: Present and Projected Future Forcings on Antarctic Peninsula Glaciers and Ice Shelves using the Weather Forecasting and Research (WRF) Model"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "3-km Surface Mass and Energy Budget for the Larsen C Ice Shelf", "uid": "601685", "west": -70.9}, {"awards": "1933764 Enderlin, Ellyn; 1643455 Enderlin, Ellyn", "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": "Thu, 06 Apr 2023 00:00:00 GMT", "description": "This dataset includes manually-extracted iceberg geometries and meltwater fluxes from 2011-2022 WorldView digital elevation model time series for 15 study sites around Antarctica. Each file contains the coordinates, median surface elevation, density, volume, surface area, draft, and submerged area estimated for an iceberg on two different observation dates (specified in the file name). The submarine meltwater flux for each iceberg, calculated as the volume change over time corrected for surface mass balance processes and creep thinning between observation dates, is provided for each iceberg. Dates listed in file names are in YYYYMMDDhhmmss format. Site abbreviations in file names are as follows: BG = Blanchard Glacier, CG = Cadman Glacier, FG = Ferrigno Glacier, FI = Filchner Ice Shelf, HG = Heim Glacier, LA = Edgeworth Glacier (Larsen A tributary), LB = Cadman Glacier (Larsen B tributary), LG = Leonardo Glacier, MI = Mertz Ice Tongue, PT = Polar Times, RI = Ronne Ice Shelf, SG = Seller Glacier, TG = Thwaites Glacier, TI = Totten Ice Shelf, and WG = Widdowson Glacier.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Elevation; Glaciology; Iceberg; Meltwater; Submarine Melt", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Enderlin, Ellyn; Dickson, Adam; Miller, Emily; Dryak, Mariama; Oliver, Caitlin; Aberle, Rainey", "project_titles": "Antarctic Submarine Melt Variability from Remote Sensing of Icebergs", "projects": [{"proj_uid": "p0010210", "repository": "USAP-DC", "title": "Antarctic Submarine Melt Variability from Remote Sensing of Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Remotely-sensed iceberg geometries and meltwater fluxes", "uid": "601679", "west": -180.0}, {"awards": "NNX16AL07G TBD", "bounds_geometry": ["POLYGON((-155.3 -82.75,-155.27 -82.75,-155.24 -82.75,-155.21 -82.75,-155.18 -82.75,-155.15 -82.75,-155.12 -82.75,-155.09 -82.75,-155.06 -82.75,-155.03 -82.75,-155 -82.75,-155 -82.76,-155 -82.77,-155 -82.78,-155 -82.78999999999999,-155 -82.8,-155 -82.81,-155 -82.82,-155 -82.83,-155 -82.83999999999999,-155 -82.85,-155.03 -82.85,-155.06 -82.85,-155.09 -82.85,-155.12 -82.85,-155.15 -82.85,-155.18 -82.85,-155.21 -82.85,-155.24 -82.85,-155.27 -82.85,-155.3 -82.85,-155.3 -82.83999999999999,-155.3 -82.83,-155.3 -82.82,-155.3 -82.81,-155.3 -82.8,-155.3 -82.78999999999999,-155.3 -82.78,-155.3 -82.77,-155.3 -82.76,-155.3 -82.75))"], "date_created": "Wed, 14 Dec 2022 00:00:00 GMT", "description": "This work was primarily funded by the NASA-funded RISE-UP: Ross Ice Shelf \u0026 Europa Underwater Probe (PI Britney E. Schmidt) project. Field work at the KIS-1 site during the 2019-2020 season was completed through international collaboration between NASA, NSF/USAP, and Antarctica New Zealand, funded by the Aotearoa New Zealand Antarctic Science Platform (ANTA1801) Antarctic Ice Dynamics Project (ASP02101), and the NZARI-funded Aotearoa New Zealand Ross Ice Shelf Programme, \u201cVulnerability of the Ross Ice Shelf in a Warming World\u201d (grant no. 2014-11).\r\n\r\nThe data contained in this directory are merged and calibrated data files from three missions conducted with ROV Icefin through a borehole drilled through Ross Ice Shelf at KIS1 (-82.78410, -155.26267), near the Kamb Ice Stream grounding zone. Missions were conducted in 2019 on December 16th, 18th, and 21st (UTC). For questions or assistance working with the data please contact Britney Schmidt (britneys@cornell.edu) and Justin Lawrence (jdl287@cornell.edu).", "east": -155.0, "geometry": ["POINT(-155.15 -82.8)"], "keywords": "Antarctica; Grounding Line; Grounding Zone; Ice Shelf; Kamb Ice Stream; Ross Ice Shelf", "locations": "Antarctica; Kamb Ice Stream; Ross Ice Shelf; Kamb Ice Stream; Antarctica", "north": -82.75, "nsf_funding_programs": null, "persons": "Lawrence, Justin; Schmidt, Britney", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -82.85, "title": "KIS-1 ROV Icefin Missions", "uid": "601625", "west": -155.3}, {"awards": "1738913 Scambos, Ted", "bounds_geometry": ["POLYGON((-105.6 -75.05,-105.58 -75.05,-105.56 -75.05,-105.53999999999999 -75.05,-105.52 -75.05,-105.5 -75.05,-105.48 -75.05,-105.46000000000001 -75.05,-105.44 -75.05,-105.42 -75.05,-105.4 -75.05,-105.4 -75.05499999999999,-105.4 -75.06,-105.4 -75.065,-105.4 -75.07,-105.4 -75.07499999999999,-105.4 -75.08,-105.4 -75.085,-105.4 -75.08999999999999,-105.4 -75.095,-105.4 -75.1,-105.42 -75.1,-105.44 -75.1,-105.46000000000001 -75.1,-105.48 -75.1,-105.5 -75.1,-105.52 -75.1,-105.53999999999999 -75.1,-105.56 -75.1,-105.58 -75.1,-105.6 -75.1,-105.6 -75.095,-105.6 -75.08999999999999,-105.6 -75.085,-105.6 -75.08,-105.6 -75.07499999999999,-105.6 -75.07,-105.6 -75.065,-105.6 -75.06,-105.6 -75.05499999999999,-105.6 -75.05))"], "date_created": "Thu, 01 Dec 2022 00:00:00 GMT", "description": "CTD data (date-time, device ID, conductivity, raw temperature, pressure, and salinity) for four CTD units recorded as they were lowered through the ice-shelf boreholes at the two sites and into the underlying ocean during installation. Cavity AMIGOS-III station CTDs were installed on 30-31 December 2019 (earlier data are from a salt-water tank in McMurdo); Channel AMIGOS-III CTDs were installed on 12 January 2020.", "east": -105.4, "geometry": ["POINT(-105.5 -75.07499999999999)"], "keywords": "Amundsen Sea; Antarctica; CTD; Ice Shelf", "locations": "Amundsen Sea; Antarctica", "north": -75.05, "nsf_funding_programs": "Antarctic Glaciology", "persons": "SCAMBOS, Ted", "project_titles": "NSF-NERC The Future of Thwaites Glacier and its Contribution to Sea-level Rise Science Coordination Office", "projects": [{"proj_uid": "p0010127", "repository": "USAP-DC", "title": "NSF-NERC The Future of Thwaites Glacier and its Contribution to Sea-level Rise Science Coordination Office"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.1, "title": "Profile CTD Data During Installation of AMIGOS-III Cavity and Channel On-Ice Moorings", "uid": "601623", "west": -105.6}, {"awards": "1739003 Holland, David", "bounds_geometry": ["POLYGON((-105 -75,-104.9 -75,-104.8 -75,-104.7 -75,-104.6 -75,-104.5 -75,-104.4 -75,-104.3 -75,-104.2 -75,-104.1 -75,-104 -75,-104 -75.042,-104 -75.084,-104 -75.126,-104 -75.168,-104 -75.21000000000001,-104 -75.252,-104 -75.294,-104 -75.336,-104 -75.378,-104 -75.42,-104.1 -75.42,-104.2 -75.42,-104.3 -75.42,-104.4 -75.42,-104.5 -75.42,-104.6 -75.42,-104.7 -75.42,-104.8 -75.42,-104.9 -75.42,-105 -75.42,-105 -75.378,-105 -75.336,-105 -75.294,-105 -75.252,-105 -75.21000000000001,-105 -75.168,-105 -75.126,-105 -75.084,-105 -75.042,-105 -75))"], "date_created": "Thu, 10 Nov 2022 00:00:00 GMT", "description": "Contained in this directory are the raw and processed data files along two transects, T1 and T2, in the grounding zone beneath Thwaites Eastern Ice Shelf, collected in January 2020 as apart of the ITGC MELT project. The code that converted raw data files to processed can be found at https://doi.org/10.5281/zenodo.7278005. Direct questions to Peter Washam at pw389@cornell.edu.", "east": -104.0, "geometry": ["POINT(-104.5 -75.21000000000001)"], "keywords": "Antarctica; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Washam, Peter", "project_titles": null, "projects": null, "repositories": null, "science_programs": "Thwaites (ITGC)", "south": -75.42, "title": "Icefin raw and processed ice, seafloor, and hydrographic data beneath Thwaites Eastern Ice Shelf", "uid": "601618", "west": -105.0}, {"awards": "1644159 Jacobs, Stanley; 1644118 Dunbar, Robert", "bounds_geometry": ["POLYGON((-108 -73,-107.1 -73,-106.2 -73,-105.3 -73,-104.4 -73,-103.5 -73,-102.6 -73,-101.7 -73,-100.8 -73,-99.9 -73,-99 -73,-99 -73.3,-99 -73.6,-99 -73.9,-99 -74.2,-99 -74.5,-99 -74.8,-99 -75.1,-99 -75.4,-99 -75.7,-99 -76,-99.9 -76,-100.8 -76,-101.7 -76,-102.6 -76,-103.5 -76,-104.4 -76,-105.3 -76,-106.2 -76,-107.1 -76,-108 -76,-108 -75.7,-108 -75.4,-108 -75.1,-108 -74.8,-108 -74.5,-108 -74.2,-108 -73.9,-108 -73.6,-108 -73.3,-108 -73))"], "date_created": "Fri, 23 Sep 2022 00:00:00 GMT", "description": "Seawater d18O and hydrographic data (temperature, salinity, oxygen where available) for 5 cruises to the Amundsen Sea in 2000, 2007, 2009, 2019, 2020", "east": -99.0, "geometry": ["POINT(-103.5 -74.5)"], "keywords": "Amundsen Sea; Antarctica; Chemistry:Water; CTD; D18O; NBP0001; NBP0702; NBP0901; NBP1901; NBP2002; Oceans; Oxygen Isotope; R/v Nathaniel B. Palmer; Seawater Isotope; Southern Ocean", "locations": "Amundsen Sea; Antarctica; Southern Ocean; Antarctica", "north": -73.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Hennig, Andrew", "project_titles": "Estimation of Antarctic Ice Melt using Stable Isotopic Analyses of Seawater; West Antarctic Ice Shelf- Ocean Interactions ", "projects": [{"proj_uid": "p0010380", "repository": "USAP-DC", "title": "Estimation of Antarctic Ice Melt using Stable Isotopic Analyses of Seawater"}, {"proj_uid": "p0010208", "repository": "USAP-DC", "title": "West Antarctic Ice Shelf- Ocean Interactions "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Antarctic Seawater d18O isotope data from SE Amundsen Sea: 2000, 2007, 2009, 2019, 2020", "uid": "601611", "west": -108.0}, {"awards": "1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-117.45625697487581 -73.79754996487824,-116.50673841062198 -73.79754996487824,-115.55721984636816 -73.79754996487824,-114.60770128211433 -73.79754996487824,-113.6581827178605 -73.79754996487824,-112.70866415360666 -73.79754996487824,-111.75914558935284 -73.79754996487824,-110.80962702509902 -73.79754996487824,-109.86010846084518 -73.79754996487824,-108.91058989659135 -73.79754996487824,-107.96107133233753 -73.79754996487824,-107.96107133233753 -74.04840280405163,-107.96107133233753 -74.29925564322501,-107.96107133233753 -74.5501084823984,-107.96107133233753 -74.80096132157178,-107.96107133233753 -75.05181416074517,-107.96107133233753 -75.30266699991856,-107.96107133233753 -75.55351983909193,-107.96107133233753 -75.80437267826532,-107.96107133233753 -76.0552255174387,-107.96107133233753 -76.30607835661209,-108.91058989659135 -76.30607835661209,-109.86010846084518 -76.30607835661209,-110.80962702509902 -76.30607835661209,-111.75914558935284 -76.30607835661209,-112.70866415360666 -76.30607835661209,-113.6581827178605 -76.30607835661209,-114.60770128211433 -76.30607835661209,-115.55721984636816 -76.30607835661209,-116.50673841062198 -76.30607835661209,-117.45625697487581 -76.30607835661209,-117.45625697487581 -76.0552255174387,-117.45625697487581 -75.80437267826532,-117.45625697487581 -75.55351983909193,-117.45625697487581 -75.30266699991856,-117.45625697487581 -75.05181416074517,-117.45625697487581 -74.80096132157178,-117.45625697487581 -74.5501084823984,-117.45625697487581 -74.29925564322501,-117.45625697487581 -74.04840280405163,-117.45625697487581 -73.79754996487824))"], "date_created": "Thu, 09 Jun 2022 00:00:00 GMT", "description": "This data set includes maps of height above flotation, surface lowering rates, dynamic thickness change, basal melt rates and grounding-line projections from the Dotson-Crosson Ice Shelf System. Furthermore, we included point clouds of migrated ICESat data and ship-based measurents of ocean current and mean potential temperature along the Dotson Ice Shelf\u0027s front.", "east": -107.96107133233753, "geometry": ["POINT(-112.70866415360666 -75.05181416074517)"], "keywords": "Antarctica; Dotson Ice Shelf; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology", "locations": "Dotson Ice Shelf; Antarctica", "north": -73.79754996487824, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wild, Christian; Segabinazzi-Dotto, Tiago", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -76.30607835661209, "title": "Dotson-Crosson Ice Shelf data from a tale of two ice shelves paper", "uid": "601578", "west": -117.45625697487581}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.55 -75.03,-105.53 -75.03,-105.51 -75.03,-105.49 -75.03,-105.47 -75.03,-105.45 -75.03,-105.43 -75.03,-105.41 -75.03,-105.39 -75.03,-105.37 -75.03,-105.35 -75.03,-105.35 -75.033,-105.35 -75.036,-105.35 -75.039,-105.35 -75.042,-105.35 -75.045,-105.35 -75.048,-105.35 -75.051,-105.35 -75.054,-105.35 -75.057,-105.35 -75.06,-105.37 -75.06,-105.39 -75.06,-105.41 -75.06,-105.43 -75.06,-105.45 -75.06,-105.47 -75.06,-105.49 -75.06,-105.51 -75.06,-105.53 -75.06,-105.55 -75.06,-105.55 -75.057,-105.55 -75.054,-105.55 -75.051,-105.55 -75.048,-105.55 -75.045,-105.55 -75.042,-105.55 -75.039,-105.55 -75.036,-105.55 -75.033,-105.55 -75.03))"], "date_created": "Tue, 29 Mar 2022 00:00:00 GMT", "description": "Campbell Scientific data loggers with eight platinum resistance thermometers (PRTs) and an acoustic snow height detector were installed as part of the AMIGOS-III instrumentation (AMIGOS: Automated Meteorology Ice Geophysics Observing System) The data are hourly reports of snow and near-surface air temperatures at different depths. At Cavity AMIGOS site, snow temperatures at ~1.2 meters depth (four PRTs) were used to provide reference temperatures for a coil of Distributed Thermal Sensing (DTS) fiber optic cable. At both sites, PRTs were attached to the tower (wrapped in reflective metal foil tape) as a means of investigating inversion strength and snow burial. At both sites, hourly snow height data using an acoustic sensor placed (initially) at 6.75 meters above the snow on a sensor cross-arm were acquired. A correction based on separately-measured air temperature was applied as per Campbell Scientifics correction algorithm. Both snow height sensors failed after just over one year (Cavity) or 10 months (Channel). Thermistor data continued to be acquired for 13 months (Cavity) or 19 months (Channel) \r\n\r\nThe two sites latest positions (01 Oct, 2021) are:\r\nCavity AMIGOS: 75.037\u00b0S, 105.58\u00b0W\r\nChannel AMIGOS: 75.049\u00b0S, 105.44\u00b0W\r\nboth stations are moving NNE at roughly 850 m.yr, having accelerated from about 650 m/yr in early 2020.", "east": -105.35, "geometry": ["POINT(-105.45 -75.045)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Pine Island Bay; Snow Accumulation; Snow Temperature; Thwaites Glacier", "locations": "Thwaites Glacier; Amundsen Sea; Pine Island Bay; Thwaites Glacier; Antarctica", "north": -75.03, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.06, "title": "AMIGOS-III Cavity and Channel Snow Height and Thermistor Snow Temperature Data", "uid": "601552", "west": -105.55}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.65 -75.04,-105.64 -75.04,-105.63 -75.04,-105.62 -75.04,-105.61 -75.04,-105.6 -75.04,-105.59 -75.04,-105.58 -75.04,-105.57 -75.04,-105.56 -75.04,-105.55 -75.04,-105.55 -75.042,-105.55 -75.044,-105.55 -75.046,-105.55 -75.048,-105.55 -75.05,-105.55 -75.052,-105.55 -75.054,-105.55 -75.056,-105.55 -75.058,-105.55 -75.06,-105.56 -75.06,-105.57 -75.06,-105.58 -75.06,-105.59 -75.06,-105.6 -75.06,-105.61 -75.06,-105.62 -75.06,-105.63 -75.06,-105.64 -75.06,-105.65 -75.06,-105.65 -75.058,-105.65 -75.056,-105.65 -75.054,-105.65 -75.052,-105.65 -75.05,-105.65 -75.048,-105.65 -75.046,-105.65 -75.044,-105.65 -75.042,-105.65 -75.04))"], "date_created": "Mon, 28 Mar 2022 00:00:00 GMT", "description": "Aquadopp 6000m data spanning 14 months (with data gaps) at the Cavity site AMIGOS (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the uncalibrated numbers from the sensors delivered through the inductive modem to the AMIGOS system and uplinked via Iridium. The units were installed two meters below each of the Seabird CTD sensors on the mooring line below the AMIGOS-3a Cavity ice shelf mooring. ", "east": -105.55, "geometry": ["POINT(-105.6 -75.05)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Mooring; Pine Island Bay; Pressure; Temperature; Thwaites Glacier", "locations": "Thwaites Glacier; Amundsen Sea; Pine Island Bay; Antarctica", "north": -75.04, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.06, "title": "AMIGOS-IIIa \"Cavity\" Aquadopp current data Jan 2020 - Mar 2021", "uid": "601547", "west": -105.65}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.55 -75.03,-105.53 -75.03,-105.51 -75.03,-105.49 -75.03,-105.47 -75.03,-105.45 -75.03,-105.43 -75.03,-105.41 -75.03,-105.39 -75.03,-105.37 -75.03,-105.35 -75.03,-105.35 -75.033,-105.35 -75.036,-105.35 -75.039,-105.35 -75.042,-105.35 -75.045,-105.35 -75.048,-105.35 -75.051,-105.35 -75.054,-105.35 -75.057,-105.35 -75.06,-105.37 -75.06,-105.39 -75.06,-105.41 -75.06,-105.43 -75.06,-105.45 -75.06,-105.47 -75.06,-105.49 -75.06,-105.51 -75.06,-105.53 -75.06,-105.55 -75.06,-105.55 -75.057,-105.55 -75.054,-105.55 -75.051,-105.55 -75.048,-105.55 -75.045,-105.55 -75.042,-105.55 -75.039,-105.55 -75.036,-105.55 -75.033,-105.55 -75.03))"], "date_created": "Mon, 28 Mar 2022 00:00:00 GMT", "description": "Visalia WXT520 weather station hourly data spanning 20 months (with data gaps) at the Cavity and Channel AMIGOS-III sites (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the values from the sensors delivered through the Iridium modem via SBD from the AMIGOS. The units were installed at ~6.5m above the surface initially, with snow accumulation gradually reducing that to an estimated 3.5 m after 20 months. The stations report wind direction and speed, air temperature, humidity, pressure, and station power.\r\n\r\nThe two sites latest positions (01 Oct, 2021) are:\r\nCavity AMIGOS: 75.037\u00b0S, 105.58\u00b0W\r\nChannel AMIGOS: 75.049\u00b0S, 105.44\u00b0W\r\nboth stations are moving NNE at roughly 850 m.yr, having accelerated from about 650 m/yr in early 2020.", "east": -105.35, "geometry": ["POINT(-105.45 -75.045)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Pine Island Bay; Thwaites Glacier", "locations": "Thwaites Glacier; Amundsen Sea; Pine Island Bay; Thwaites Glacier; Antarctica", "north": -75.03, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.06, "title": "Visala WXT520 weather station data at the Cavity and Channel AMIGOS-III sites", "uid": "601549", "west": -105.55}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.45 -75.04,-105.44 -75.04,-105.43 -75.04,-105.42 -75.04,-105.41 -75.04,-105.4 -75.04,-105.39 -75.04,-105.38 -75.04,-105.37 -75.04,-105.36 -75.04,-105.35 -75.04,-105.35 -75.042,-105.35 -75.044,-105.35 -75.046,-105.35 -75.048,-105.35 -75.05,-105.35 -75.052,-105.35 -75.054,-105.35 -75.056,-105.35 -75.058,-105.35 -75.06,-105.36 -75.06,-105.37 -75.06,-105.38 -75.06,-105.39 -75.06,-105.4 -75.06,-105.41 -75.06,-105.42 -75.06,-105.43 -75.06,-105.44 -75.06,-105.45 -75.06,-105.45 -75.058,-105.45 -75.056,-105.45 -75.054,-105.45 -75.052,-105.45 -75.05,-105.45 -75.048,-105.45 -75.046,-105.45 -75.044,-105.45 -75.042,-105.45 -75.04))"], "date_created": "Mon, 28 Mar 2022 00:00:00 GMT", "description": "Aquadopp 6000m data spanning 14 months (with data gaps) at the Channel site AMIGOS (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the uncalibrated numbers from the sensors delivered through the inductive modem to the AMIGOS system and uplinked via Iridium. The units were installed two meters below each of the Seabird CTD sensors on the mooring line below the AMIGOS-3a Channel ice shelf mooring. ", "east": -105.35, "geometry": ["POINT(-105.4 -75.05)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Mooring; Pine Island Bay; Pressure; Temperature; Thwaites Glacier", "locations": "Thwaites Glacier; Amundsen Sea; Pine Island Bay; Antarctica", "north": -75.04, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.06, "title": "AMIGOS-IIIc \"Channel\" Aquadopp current data Jan 2020 - Mar 2021", "uid": "601548", "west": -105.45}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.6 -75.045,-105.595 -75.045,-105.59 -75.045,-105.585 -75.045,-105.58 -75.045,-105.575 -75.045,-105.57 -75.045,-105.565 -75.045,-105.56 -75.045,-105.555 -75.045,-105.55 -75.045,-105.55 -75.047,-105.55 -75.049,-105.55 -75.051,-105.55 -75.053,-105.55 -75.055,-105.55 -75.057,-105.55 -75.059,-105.55 -75.061,-105.55 -75.063,-105.55 -75.065,-105.555 -75.065,-105.56 -75.065,-105.565 -75.065,-105.57 -75.065,-105.575 -75.065,-105.58 -75.065,-105.585 -75.065,-105.59 -75.065,-105.595 -75.065,-105.6 -75.065,-105.6 -75.063,-105.6 -75.061,-105.6 -75.059,-105.6 -75.057,-105.6 -75.055,-105.6 -75.053,-105.6 -75.051,-105.6 -75.049,-105.6 -75.047,-105.6 -75.045))"], "date_created": "Sat, 26 Mar 2022 00:00:00 GMT", "description": "Seabird MicroCAT SBE37IMP data spanning two years (with data gaps) at the Cavity site AMIGOS (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the uncalibrated numbers from the sensors delivered through the inductive modem to the AMIGOS system and uplinked via Iridium. Calibration information and test runs against a retrieved CTD unit are provided.", "east": -105.55, "geometry": ["POINT(-105.575 -75.055)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Mooring; Pine Island Bay; Pressure; Salinity; Temperature; Thwaites Glacier", "locations": "Thwaites Glacier; Amundsen Sea; Pine Island Bay; Antarctica", "north": -75.045, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.065, "title": "AMIGOS-IIIa \"Cavity\" Seabird CTD data Jan 2020 - Dec 2021", "uid": "601544", "west": -105.6}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.43 -75.045,-105.425 -75.045,-105.42 -75.045,-105.415 -75.045,-105.41 -75.045,-105.405 -75.045,-105.4 -75.045,-105.395 -75.045,-105.39 -75.045,-105.385 -75.045,-105.38 -75.045,-105.38 -75.047,-105.38 -75.049,-105.38 -75.051,-105.38 -75.053,-105.38 -75.055,-105.38 -75.057,-105.38 -75.059,-105.38 -75.061,-105.38 -75.063,-105.38 -75.065,-105.385 -75.065,-105.39 -75.065,-105.395 -75.065,-105.4 -75.065,-105.405 -75.065,-105.41 -75.065,-105.415 -75.065,-105.42 -75.065,-105.425 -75.065,-105.43 -75.065,-105.43 -75.063,-105.43 -75.061,-105.43 -75.059,-105.43 -75.057,-105.43 -75.055,-105.43 -75.053,-105.43 -75.051,-105.43 -75.049,-105.43 -75.047,-105.43 -75.045))"], "date_created": "Sat, 26 Mar 2022 00:00:00 GMT", "description": "Seabird MicroCAT SBE37IMP data spanning two years (with data gaps) at the Channel site AMIGOS (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the uncalibrated numbers from the sensors delivered through the inductive modem to the AMIGOS system and uplinked via Iridium. Calibration information and test runs against a retrieved CTD unit are provided.", "east": -105.38, "geometry": ["POINT(-105.405 -75.055)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Mooring; Pine Island Bay; Pressure; Salinity; Temperature; Thwaites Glacier", "locations": "Thwaites Glacier; Amundsen Sea; Pine Island Bay; Antarctica", "north": -75.045, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.065, "title": "AMIGOS-IIIc \"Channel\" Seabird CTD data Jan 2020 - Dec 2021", "uid": "601545", "west": -105.43}, {"awards": "1744954 Lubin, Dan", "bounds_geometry": ["POINT(-148.81 -81.65)"], "date_created": "Fri, 18 Mar 2022 00:00:00 GMT", "description": "This data set comprises radiative and turbulent flux components of the surface energy balance at Siple Dome, West Antarctica, measured between 21 December 2019 and 19 January 2020. Radiative fluxes were measured by Kipp \u0026 Zonen pyranometers and pyrgeometers. A Campbell Scientific open path eddy covariance system measured sensible and latent heat fluxes. An Apogee infrared sensor measured surface skin temperature. Sky conditions were observed using an ALCOR System digital all-sky camera. A StellarNet shortwave spectroradiometer system measured downwelling spectral irradiance in the wavelength range 350-1700 nm.", "east": -148.81, "geometry": ["POINT(-148.81 -81.65)"], "keywords": "Antarctica; Siple Dome; Spectroscopy", "locations": "Siple Dome; Antarctica", "north": -81.65, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Lubin, Dan; Ghiz, Madison", "project_titles": "Surface Energy Balance on West Antarctica and the Ross Ice Shelf", "projects": [{"proj_uid": "p0010296", "repository": "USAP-DC", "title": "Surface Energy Balance on West Antarctica and the Ross Ice Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.65, "title": "Siple Dome Surface Energy Flux", "uid": "601540", "west": -148.81}, {"awards": "1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-108 -74.5,-107.6 -74.5,-107.2 -74.5,-106.8 -74.5,-106.4 -74.5,-106 -74.5,-105.6 -74.5,-105.2 -74.5,-104.8 -74.5,-104.4 -74.5,-104 -74.5,-104 -74.6,-104 -74.7,-104 -74.8,-104 -74.9,-104 -75,-104 -75.1,-104 -75.2,-104 -75.3,-104 -75.4,-104 -75.5,-104.4 -75.5,-104.8 -75.5,-105.2 -75.5,-105.6 -75.5,-106 -75.5,-106.4 -75.5,-106.8 -75.5,-107.2 -75.5,-107.6 -75.5,-108 -75.5,-108 -75.4,-108 -75.3,-108 -75.2,-108 -75.1,-108 -75,-108 -74.9,-108 -74.8,-108 -74.7,-108 -74.6,-108 -74.5))"], "date_created": "Thu, 23 Dec 2021 00:00:00 GMT", "description": "This data set includes two grounding-line products of Thwaites Glacier and a series of offshore pinning points for 2014 and 2019/20. The grounding lines where delineated manually from height above flotation calculations using the bathymetry model from Jordan et al. (2020), the REMA digital surface elevation model (Howat et al., 2019) for the 2014 product and ICESat-2 surface altimetry data (Smith et al., 2019) for the 2019/20 product. More details about the processing, corrections and uncertainties can be found in our publication. We would appreciate if users who think the grounding-line products are useful for your own research would cite our manuscript.", "east": -104.0, "geometry": ["POINT(-106 -75)"], "keywords": "Amundsen Sea; Antarctica; Glaciology; Grounding Line; Ice Shelf; Thwaites Glacier", "locations": "Thwaites Glacier; Thwaites Glacier; Amundsen Sea; Antarctica; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Wild, Christian; Alley, Karen; Muto, Atsu; Truffer, Martin; Scambos, Ted; Pettit, Erin", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.5, "title": "Thwaites Glacier grounding lines for 2014 and 2019/20 from height above flotation", "uid": "601499", "west": -108.0}, {"awards": "0732625 Leventer, Amy; 1433140 Domack, Eugene", "bounds_geometry": ["POLYGON((-69 -58,-67.7 -58,-66.4 -58,-65.1 -58,-63.8 -58,-62.5 -58,-61.2 -58,-59.9 -58,-58.6 -58,-57.3 -58,-56 -58,-56 -59,-56 -60,-56 -61,-56 -62,-56 -63,-56 -64,-56 -65,-56 -66,-56 -67,-56 -68,-57.3 -68,-58.6 -68,-59.9 -68,-61.2 -68,-62.5 -68,-63.8 -68,-65.1 -68,-66.4 -68,-67.7 -68,-69 -68,-69 -67,-69 -66,-69 -65,-69 -64,-69 -63,-69 -62,-69 -61,-69 -60,-69 -59,-69 -58))"], "date_created": "Mon, 15 Nov 2021 00:00:00 GMT", "description": "This data set contains an age vs depth model and measurements of magnetic susceptibility, benthic foraminifera Bulimina aculeata d18O and d13C, bulk sediment GDGT data, and diatom assemblage data from USAP LMG13-11 JKC-1 sediment core (0-100 cm) archived at the Oregon State University ACC repository. All stable isotope and GDGT measurements were made at the University of South Florida College of Marine Science. Diatom assemblages were counted at Colgate University. The data set includes all replicate measurements. Details of the entire data set and all relevant methods are provided in Browne et al (submitted, 2021)", "east": -56.0, "geometry": ["POINT(-62.5 -63)"], "keywords": "Antarctica; Antarctic Peninsula; Delta 13C; Delta 18O; Paleoceanography; Temperature", "locations": "Antarctic Peninsula; Antarctica", "north": -58.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Shevenell, Amelia", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -68.0, "title": "LMG13-11 JKC-1 Paleoceanographic data", "uid": "601485", "west": -69.0}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-114 -74,-113 -74,-112 -74,-111 -74,-110 -74,-109 -74,-108 -74,-107 -74,-106 -74,-105 -74,-104 -74,-104 -74.2,-104 -74.4,-104 -74.6,-104 -74.8,-104 -75,-104 -75.2,-104 -75.4,-104 -75.6,-104 -75.8,-104 -76,-105 -76,-106 -76,-107 -76,-108 -76,-109 -76,-110 -76,-111 -76,-112 -76,-113 -76,-114 -76,-114 -75.8,-114 -75.6,-114 -75.4,-114 -75.2,-114 -75,-114 -74.8,-114 -74.6,-114 -74.4,-114 -74.2,-114 -74))"], "date_created": "Mon, 11 Oct 2021 00:00:00 GMT", "description": "This dataset includes GeoTiffs of two-year averages of ice flow velocity (including x- and y-components and flow speed) and longitudinal, transverse, and shear strain rates for the Thwaites Eastern Ice Shelf (TEIS) from 2001-2020. The grids were derived from feature tracking on MODIS, Landsat-7, and Landsat-8 imagery. Each pixel in a grid represents the median value of a stack of all available pixels for each time period. Data are gridded at a 500 m spatial resolution in a polar stereographic (EPSG:3031) projection. Speed units are m/day and strain rates are in units of /day. In addition, we provide videos of each variable (excluding x- and y-velocity components) placed alongside a MODIS image of the same extent and from around the same time to provide context. In addition to the variables noted above, we include videos for flow direction (in degrees from grid north in an EPSG:3031 projection) and a zoomed-in version of flow direction, which were calculated from the provided grids.", "east": -104.0, "geometry": ["POINT(-109 -75)"], "keywords": "Antarctica; Glaciology; Ice Shelf; Ice Velocity; Strain Rate; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -74.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Alley, Karen; Wild, Christian; Scambos, Ted; Muto, Atsu; Pettit, Erin; Truffer, Martin; Wallin, Bruce; Klinger, Marin", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -76.0, "title": "Two-year velocity and strain-rate averages from the Thwaites Eastern Ice Shelf, 2001-2020", "uid": "601478", "west": -114.0}, {"awards": "1644159 Jacobs, Stanley", "bounds_geometry": ["POLYGON((165 -76.5,165.6 -76.5,166.2 -76.5,166.8 -76.5,167.4 -76.5,168 -76.5,168.6 -76.5,169.2 -76.5,169.8 -76.5,170.4 -76.5,171 -76.5,171 -76.65,171 -76.8,171 -76.95,171 -77.1,171 -77.25,171 -77.4,171 -77.55,171 -77.7,171 -77.85,171 -78,170.4 -78,169.8 -78,169.2 -78,168.6 -78,168 -78,167.4 -78,166.8 -78,166.2 -78,165.6 -78,165 -78,165 -77.85,165 -77.7,165 -77.55,165 -77.4,165 -77.25,165 -77.1,165 -76.95,165 -76.8,165 -76.65,165 -76.5))"], "date_created": "Fri, 25 Jun 2021 00:00:00 GMT", "description": "Salinity and temperature at 50 \u0026 100 m intervals from profiles near Ross Island, Antarctica in 1936 and from 1956-57 through 2019-2020.", "east": 171.0, "geometry": ["POINT(168 -77.25)"], "keywords": "Antarctica; CTD; Oceans; Physical Oceanography; Ross Island; Ross Sea; Salinity; Temperature", "locations": "Ross Sea; Ross Island; Antarctica", "north": -76.5, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Jacobs, Stanley; Giulivi, Claudia", "project_titles": "West Antarctic Ice Shelf- Ocean Interactions ", "projects": [{"proj_uid": "p0010208", "repository": "USAP-DC", "title": "West Antarctic Ice Shelf- Ocean Interactions "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Ross Island area DJF salinity and temperature records 1956-57 through 2019-20", "uid": "601458", "west": 165.0}, {"awards": "0732946 Steffen, Konrad", "bounds_geometry": ["POLYGON((-65 -66,-64.5 -66,-64 -66,-63.5 -66,-63 -66,-62.5 -66,-62 -66,-61.5 -66,-61 -66,-60.5 -66,-60 -66,-60 -66.3,-60 -66.6,-60 -66.9,-60 -67.2,-60 -67.5,-60 -67.8,-60 -68.1,-60 -68.4,-60 -68.7,-60 -69,-60.5 -69,-61 -69,-61.5 -69,-62 -69,-62.5 -69,-63 -69,-63.5 -69,-64 -69,-64.5 -69,-65 -69,-65 -68.7,-65 -68.4,-65 -68.1,-65 -67.8,-65 -67.5,-65 -67.2,-65 -66.9,-65 -66.6,-65 -66.3,-65 -66))"], "date_created": "Wed, 19 May 2021 00:00:00 GMT", "description": "As part of IPY-0732946, three automatic weather stations (Larsen 1, 2, 3) were installed along a latitudinal gradient on the Larsen C ice shelf. The stations were installed in December 2008 (Larsen 3 AWS did not come online until 2009) and operated through the end of the project in November 2011.", "east": -60.0, "geometry": ["POINT(-62.5 -67.5)"], "keywords": "Antarctica; Atmosphere; AWS; Foehn Winds; Ice Shelf; Larsen C Ice Shelf; Larsen Ice Shelf; Meteorology; Weather Station Data", "locations": "Larsen C Ice Shelf; Larsen Ice Shelf; Antarctica", "north": -66.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McGrath, Daniel; Bayou, Nicolas; Steffen, Konrad", "project_titles": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate", "projects": [{"proj_uid": "p0000087", "repository": "USAP-DC", "title": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "Larsen C automatic weather station data 2008\u20132011", "uid": "601445", "west": -65.0}, {"awards": "1543325 Landolt, Scott; 1543377 Seefeldt, Mark", "bounds_geometry": ["POLYGON((166.918 -77.877,167.2997 -77.877,167.6814 -77.877,168.0631 -77.877,168.4448 -77.877,168.8265 -77.877,169.2082 -77.877,169.5899 -77.877,169.9716 -77.877,170.3533 -77.877,170.735 -77.877,170.735 -77.99,170.735 -78.103,170.735 -78.216,170.735 -78.329,170.735 -78.442,170.735 -78.555,170.735 -78.668,170.735 -78.781,170.735 -78.894,170.735 -79.007,170.3533 -79.007,169.9716 -79.007,169.5899 -79.007,169.2082 -79.007,168.8265 -79.007,168.4448 -79.007,168.0631 -79.007,167.6814 -79.007,167.2997 -79.007,166.918 -79.007,166.918 -78.894,166.918 -78.781,166.918 -78.668,166.918 -78.555,166.918 -78.442,166.918 -78.329,166.918 -78.216,166.918 -78.103,166.918 -77.99,166.918 -77.877))"], "date_created": "Tue, 04 May 2021 00:00:00 GMT", "description": "The dataset includes precipitation and associated observations at four sites across the northwest Ross Ice Shelf from December 2017 to November 2019. The general instruments at each site include precipitation gauge - installed inside a wind shield, anemometer, thermometer, sonic ranging sensor, optical particle detector, laser disdrometer, shortwave and longwave radiation sensors, and a field camera. The observations from each site include: precipitation (liquid water equivalent), temperature, wind speed, snow surface height, particle count, particle size and speed, upward/downward longwave radiation, upward/downward shortwave radiation, still image photos, and 5-second movies. The data are in comma-delimited text files, jpg photos, and mp4 movies. png plots of the quality-controlled observations are included for quick views of the data.", "east": 170.735, "geometry": ["POINT(168.8265 -78.442)"], "keywords": "Accumulation; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Meteorology; Precipitation; Ross Ice Shelf; Snow; Snow/ice; Snow/Ice; Weatherstation; Weather Station Data", "locations": "Ross Ice Shelf; Antarctica", "north": -77.877, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Seefeldt, Mark", "project_titles": "Collaborative Research: Implementing Low-power, Autonomous Observing Systems to Improve the Measurement and Understanding of Antarctic Precipitation", "projects": [{"proj_uid": "p0010173", "repository": "USAP-DC", "title": "Collaborative Research: Implementing Low-power, Autonomous Observing Systems to Improve the Measurement and Understanding of Antarctic Precipitation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.007, "title": "Precipitation Observations for the Northwest Ross Ice Shelf - 2017-12 to 2019-11", "uid": "601441", "west": 166.918}, {"awards": "1745137 Schroeder, Dustin", "bounds_geometry": ["POLYGON((-130 -72.9,-125.27 -72.9,-120.54 -72.9,-115.81 -72.9,-111.08 -72.9,-106.35 -72.9,-101.62 -72.9,-96.89 -72.9,-92.16 -72.9,-87.43 -72.9,-82.7 -72.9,-82.7 -73.76,-82.7 -74.62,-82.7 -75.48,-82.7 -76.34,-82.7 -77.2,-82.7 -78.06,-82.7 -78.92,-82.7 -79.78,-82.7 -80.64,-82.7 -81.5,-87.43 -81.5,-92.16 -81.5,-96.89 -81.5,-101.62 -81.5,-106.35 -81.5,-111.08 -81.5,-115.81 -81.5,-120.54 -81.5,-125.27 -81.5,-130 -81.5,-130 -80.64,-130 -79.78,-130 -78.92,-130 -78.06,-130 -77.2,-130 -76.34,-130 -75.48,-130 -74.62,-130 -73.76,-130 -72.9))"], "date_created": "Fri, 05 Mar 2021 00:00:00 GMT", "description": "The dataset contains radargrams from the 2004-2005 airborne radar sounding surveys on Pine Island Glacier and Thwaites Glacier as part of the BBAS and AGASEA projects. It also includes basal reflectivity and one-way attenuation rates derived from these radargrams. Radar data from the Pine Island Ice Shelf inland to the Bentley Sublglacial Trench were collected by the British Antarctica Survey (BAS) with the Polarimetric-radar Airborne Science INstrument (PASIN) radar sounder, operating at a center frequency of 150 MHz and 15 MHz bandwidth. Data over Thwaites Glacier were collected by the University of Texas Institute for Geophysics (UTIG) High Capability Airborne Radar Sounder (HiCARS) operating at a center frequency of 60 MHz with 15 MHz of bandwidth. Data are provided as 50km segments in NetCDF files, along with kml location files, and pdf files for browsing radargrams images by flight transect. Details of the processing methods are included in the associated README file. The processed data sets (reflectivity and attenuation) are provided as a single NetCDF file for each flight transect. Details of the calibration and processing procedures are provided in Chu, et al (in review).", "east": -82.7, "geometry": ["POINT(-106.35 -77.2)"], "keywords": "Amundsen Sea; Antarctica; Bed Reflectivity; Ice Penetrating Radar; Radar Echo Sounder", "locations": "Amundsen Sea; Antarctica", "north": -72.9, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Chu, Winnie; Hilger, Andrew M.; Culberg, Riley; Schroeder, Dustin; Jordan, Thomas M.; Seroussi, Helene; Young, Duncan A.; Vaughan, David G.", "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": -81.5, "title": "Radar Sounding Observations of the Amundsen Sea Embayment, 2004-2005", "uid": "601436", "west": -130.0}, {"awards": "0440670 Hulbe, Christina", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,177.5 -86,175 -86,172.5 -86,170 -86,167.5 -86,165 -86,162.5 -86,160 -86,157.5 -86,155 -86,155 -85.1,155 -84.2,155 -83.3,155 -82.4,155 -81.5,155 -80.6,155 -79.7,155 -78.8,155 -77.9,155 -77,157.5 -77,160 -77,162.5 -77,165 -77,167.5 -77,170 -77,172.5 -77,175 -77,177.5 -77,-180 -77))"], "date_created": "Fri, 19 Feb 2021 00:00:00 GMT", "description": "The surface of the Ross Ice Shelf (RIS) is textured by flow stripes, crevasses and other fea- tures related to ice flow and deformation. Here, moderate resolution optical satellite images are used to map and classify regions of the RIS characterized by different surface textures. Because the textures arise from ice deformation, the map is used to identify structural provinces with common deformation history. We classify four province types: regions associated with large outlet glaciers, shear zones, exten- sion downstream of obstacles and suture zones between provinces with different upstream sources. Adjacent provinces with contrasting histories are in some locations deforming at different rates, suggest- ing that our province map is also an ice fabric map. Structural provinces have more complicated shapes in the part of the ice shelf fed by West Antarctic ice streams than in the part fed by outlet glaciers from the Transantarctic Mountains. The map may be used to infer past variations in stress conditions and flow events that cannot be inferred from flow traces alone.", "east": 155.0, "geometry": ["POINT(-177.5 -81.5)"], "keywords": "Antarctica", "locations": "Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina; Ledoux, Christine; Forbes, Martin", "project_titles": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams", "projects": [{"proj_uid": "p0000096", "repository": "USAP-DC", "title": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "MOA-derived Structural Feature Map of the Ross Ice Shelf", "uid": "601432", "west": -150.0}, {"awards": "1842021 Campbell, Seth", "bounds_geometry": ["POLYGON((-168 -82,-162.3 -82,-156.6 -82,-150.9 -82,-145.2 -82,-139.5 -82,-133.8 -82,-128.1 -82,-122.4 -82,-116.7 -82,-111 -82,-111 -82.6,-111 -83.2,-111 -83.8,-111 -84.4,-111 -85,-111 -85.6,-111 -86.2,-111 -86.8,-111 -87.4,-111 -88,-116.7 -88,-122.4 -88,-128.1 -88,-133.8 -88,-139.5 -88,-145.2 -88,-150.9 -88,-156.6 -88,-162.3 -88,-168 -88,-168 -87.4,-168 -86.8,-168 -86.2,-168 -85.6,-168 -85,-168 -84.4,-168 -83.8,-168 -83.2,-168 -82.6,-168 -82))"], "date_created": "Sat, 12 Dec 2020 00:00:00 GMT", "description": "The dataset includes initialization and output files of a numerical ice flow simulation of the Whillans and Mercer Ice Streams . The Ice Sheet System Model (ISSM) model was used to solve a 100-year transient stress balance solution of the region with ~10 kPA/yr friction increase downstream of the shear margin between the Whillans and Mercer ice streams. \r\n", "east": -111.0, "geometry": ["POINT(-139.5 -85)"], "keywords": "Antarctica; Glaciology; Ice Sheet Flow Model; Ice Shelf Dynamics; Mercer Ice Stream; Model Data; Snow/ice; Snow/Ice; Whillans Ice Stream", "locations": "Whillans Ice Stream; Mercer Ice Stream; Antarctica", "north": -82.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kaluzienski, Lynn", "project_titles": "RAPID Proposal: Constraining kinematics of the Whillans/Mercer Ice Stream Confluence", "projects": [{"proj_uid": "p0010145", "repository": "USAP-DC", "title": "RAPID Proposal: Constraining kinematics of the Whillans/Mercer Ice Stream Confluence"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -88.0, "title": "Whillans and Mercer Shear Margin Ice Flow simulation in ISSM", "uid": "601404", "west": -168.0}, {"awards": "1842021 Campbell, Seth", "bounds_geometry": ["POLYGON((-168 -82,-162.3 -82,-156.6 -82,-150.9 -82,-145.2 -82,-139.5 -82,-133.8 -82,-128.1 -82,-122.4 -82,-116.7 -82,-111 -82,-111 -82.5,-111 -83,-111 -83.5,-111 -84,-111 -84.5,-111 -85,-111 -85.5,-111 -86,-111 -86.5,-111 -87,-116.7 -87,-122.4 -87,-128.1 -87,-133.8 -87,-139.5 -87,-145.2 -87,-150.9 -87,-156.6 -87,-162.3 -87,-168 -87,-168 -86.5,-168 -86,-168 -85.5,-168 -85,-168 -84.5,-168 -84,-168 -83.5,-168 -83,-168 -82.5,-168 -82))"], "date_created": "Sat, 12 Dec 2020 00:00:00 GMT", "description": "The dataset includes GPS coordinates for crevasse/fracture locations picked from 350MHz and 400Mhz frequency GPR dataset in the Whillans/Mercer Shear Margin along the SALSA traverse route with associated kinematic outputs for each feature (shear strain rate, vorticity, dilatation). GPS coordinates are in the Antarctic Polar Stereographic projection (EPSG:3031). ", "east": -111.0, "geometry": ["POINT(-139.5 -84.5)"], "keywords": "Antarctica; Crevasses; Glaciology; GPR; GPS; Ice Sheet Flow Model; Ice Shelf Dynamics; Snow/ice; Snow/Ice; Whillans Ice Stream", "locations": "Whillans Ice Stream; Antarctica", "north": -82.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kaluzienski, Lynn", "project_titles": "RAPID Proposal: Constraining kinematics of the Whillans/Mercer Ice Stream Confluence", "projects": [{"proj_uid": "p0010145", "repository": "USAP-DC", "title": "RAPID Proposal: Constraining kinematics of the Whillans/Mercer Ice Stream Confluence"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.0, "title": "2017 GPR Observations of the Whillans and Mercer Ice Streams", "uid": "601403", "west": -168.0}, {"awards": "1745116 Scambos, Ted", "bounds_geometry": ["POLYGON((-72 -70.75,-71.95 -70.75,-71.9 -70.75,-71.85 -70.75,-71.8 -70.75,-71.75 -70.75,-71.7 -70.75,-71.65 -70.75,-71.6 -70.75,-71.55 -70.75,-71.5 -70.75,-71.5 -70.775,-71.5 -70.8,-71.5 -70.825,-71.5 -70.85,-71.5 -70.875,-71.5 -70.9,-71.5 -70.925,-71.5 -70.95,-71.5 -70.975,-71.5 -71,-71.55 -71,-71.6 -71,-71.65 -71,-71.7 -71,-71.75 -71,-71.8 -71,-71.85 -71,-71.9 -71,-71.95 -71,-72 -71,-72 -70.975,-72 -70.95,-72 -70.925,-72 -70.9,-72 -70.875,-72 -70.85,-72 -70.825,-72 -70.8,-72 -70.775,-72 -70.75))"], "date_created": "Wed, 21 Oct 2020 00:00:00 GMT", "description": "This dataset compiles a suite of glaciology (density, stratigraphy), hydrology (slug and dilution tests) and geophysical measurements (GPS, GPR, ApRES) to characterize a firn aquifer observed within the Wilkins Ice Shelf, Antarctica.", "east": -71.5, "geometry": ["POINT(-71.75 -70.875)"], "keywords": "Airborne Radar; Antarctica; Antarctic Peninsula; Firn; Firn Aquifer; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Hydrology; Snow/ice; Snow/Ice; Wilkins Ice Shelf", "locations": "Antarctic Peninsula; Wilkins Ice Shelf; Wilkins Ice Shelf; Antarctica", "north": -70.75, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mi\u00e8ge, Cl\u00e9ment; Montgomery, Lynn; Miller, Julie; Scambos, Ted; Wallin, Bruce; Miller, Olivia; Solomon, Kip; Forster, Richard; Koenig, Lora", "project_titles": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences", "projects": [{"proj_uid": "p0010126", "repository": "USAP-DC", "title": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.0, "title": "Density, hydrology and geophysical measurements from the Wilkins Ice Shelf firn aquifer", "uid": "601390", "west": -72.0}, {"awards": "1644187 Tulaczyk, Slawek", "bounds_geometry": ["POLYGON((161 -76.9,161.75 -76.9,162.5 -76.9,163.25 -76.9,164 -76.9,164.75 -76.9,165.5 -76.9,166.25 -76.9,167 -76.9,167.75 -76.9,168.5 -76.9,168.5 -77.04,168.5 -77.18,168.5 -77.32,168.5 -77.46,168.5 -77.6,168.5 -77.74,168.5 -77.88,168.5 -78.02,168.5 -78.16,168.5 -78.3,167.75 -78.3,167 -78.3,166.25 -78.3,165.5 -78.3,164.75 -78.3,164 -78.3,163.25 -78.3,162.5 -78.3,161.75 -78.3,161 -78.3,161 -78.16,161 -78.02,161 -77.88,161 -77.74,161 -77.6,161 -77.46,161 -77.32,161 -77.18,161 -77.04,161 -76.9))"], "date_created": "Sat, 12 Sep 2020 00:00:00 GMT", "description": " The ANTAEM survey was carried out in the period November 12th to 28th, 2018, with the SkyTEM 312 system. Twenty-one missions (flights) were conducted over 11 production days of helicopter service, resulting in a total of approximately ~3400 line km of data. The SkyTEM system records data from take-off until landing resulting in multiple lines converging to the landing pads in McMurdo and at Marble Point. The production without overlapping lines adds up to approximately 2900 line km. The flight speed was approximately 120 km/h at a target flight altitude of ~50 m (sensor height), but the actual sensor height varies depending on the terrain. The surveys were carried out with a Bell 212 helicopter, which carried the SkyTEM sensor as a sling load. The SkyTEM system was configured in a standard two-moment setup (low moment, LM and high moment, HM). Areas with extremely resistive dry and/or frozen sediment/bedrock, and glacier ice often produce EM-signals with amplitudes below the detection level of the system. Data from these low signal environments cannot be inverted into resistivity models. Data with strong induced polarization effects cannot be inverted for resistivity either. These data were discharged in this standard data delivery. \r\n The EM-data and inversion result (resistivity models) are delivered in the SkyTEM2018_dat.xyz and SkyTEM2018_inv.xyz files respectably. The RECORD number in the two files links data and model together. EM-data and data uncertainty for data entering inversion. Info stated in file Header: NAN value, Data unit, Coordinate system, Gate times. The SkyTEM system uses at High-Low moment data recording cycle, therefore only a subset of the total 40 time gates are preset for each moment. The standard lateral constraints inversion (LCI), delivered in the SkyTEM2018_inv.xyz file, was carried out with a smooth 30 layered resistivity model discretized to a depth of 500 m. A depth of investigation (DOI) was estimated for each resistivity model.\r\n", "east": 168.5, "geometry": ["POINT(164.75 -77.6)"], "keywords": "Antarctica; Dry Valleys; Hydrology; Ice Shelf; Mcmurdo; Permafrost", "locations": "Mcmurdo; Dry Valleys; Antarctica", "north": -76.9, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Tulaczyk, Slawek", "project_titles": "Collaborative Research: Antarctic Airborne ElectroMagnetics (ANTAEM) - Revealing Subsurface Water in Coastal Antarctica", "projects": [{"proj_uid": "p0010129", "repository": "USAP-DC", "title": "Collaborative Research: Antarctic Airborne ElectroMagnetics (ANTAEM) - Revealing Subsurface Water in Coastal Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.3, "title": "ANTAEM project airborne EM resistivity data from McMurdo Region", "uid": "601373", "west": 161.0}, {"awards": "0125602 Padman, Laurence; 0125252 Padman, Laurence; 1443677 Padman, Laurence", "bounds_geometry": ["POLYGON((-180 -53,-144 -53,-108 -53,-72 -53,-36 -53,0 -53,36 -53,72 -53,108 -53,144 -53,180 -53,180 -56.7,180 -60.4,180 -64.1,180 -67.8,180 -71.5,180 -75.2,180 -78.9,180 -82.6,180 -86.3,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -86.3,-180 -82.6,-180 -78.9,-180 -75.2,-180 -71.5,-180 -67.8,-180 -64.1,-180 -60.4,-180 -56.7,-180 -53))"], "date_created": "Fri, 10 Jul 2020 00:00:00 GMT", "description": "The Antarctic Tide Gauge (AntTG) database provides tidal harmonic coefficients (amplitude and phase) for ocean surface height (tide-induced height perturbation relative to the seabed) at many coastal, ocean and ice shelf locations around Antarctica. The coefficients are provided for up to 8 tidal constituents (Q1, O1, P1, K1, N2 , M2, S2, K2) where data is available. These coefficients are primarily intended for users interested in validation of tide models for the Antarctic seas including the areas covered by the floating ice shelves (e.g., King and Padman, 2005; King et al., 2011; Stammer et al., 2014). The database is provided as single files in ASCII text and MATLAB *.mat formats, as well as in a KML package that can be viewed in Google Earth. \r\n\r\nSeveral different measurement systems were used to collect the data. The quality of database entries varies widely, from short records of unknown accuracy to very precise, long-term records from bottom pressure recorders in the ocean and GPS systems installed on ice shelves. This database provides sufficient quality control information (record length, time step, and measurement type) for a user to judge whether a tidal analysis at a particular site is likely to be useful for their application.\r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Oceans; Sea Surface Height; Tide Gauges; Tides", "locations": "Antarctica", "north": -53.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Arctic System Science; Antarctic Ocean and Atmospheric Sciences", "persons": "Howard, Susan L.; Padman, Laurence; King, Matt", "project_titles": "Ocean Tides around Antarctica and in the Southern Ocean", "projects": [{"proj_uid": "p0010116", "repository": "USAP-DC", "title": "Ocean Tides around Antarctica and in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Tide Gauge Database, version 1", "uid": "601358", "west": -180.0}, {"awards": "1141890 Huber, Bruce; 0732651 Gordon, Arnold", "bounds_geometry": ["POLYGON((-63 -60,-62.2 -60,-61.4 -60,-60.6 -60,-59.8 -60,-59 -60,-58.2 -60,-57.4 -60,-56.6 -60,-55.8 -60,-55 -60,-55 -60.5,-55 -61,-55 -61.5,-55 -62,-55 -62.5,-55 -63,-55 -63.5,-55 -64,-55 -64.5,-55 -65,-55.8 -65,-56.6 -65,-57.4 -65,-58.2 -65,-59 -65,-59.8 -65,-60.6 -65,-61.4 -65,-62.2 -65,-63 -65,-63 -64.5,-63 -64,-63 -63.5,-63 -63,-63 -62.5,-63 -62,-63 -61.5,-63 -61,-63 -60.5,-63 -60))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a Sea-Bird SBE 9Plus CTD during Nathaniel B. Palmer expedition NBP1203 conducted in 2012 (Chief Scientist: Dr. Maria Vernet; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement, Salinity, and Temperature data and were processed after data collection. Funding was provided by NSF grant(s): ANT11-41890.", "east": -55.0, "geometry": ["POINT(-59 -62.5)"], "keywords": "Antarctica; Antarctic Peninsula; CTD; CTD Data; LARISSA; Larsen Ice Shelf; NBP1203; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer; Salinity; Temperature", "locations": "Antarctic Peninsula; Larsen Ice Shelf; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Integrated System Science", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Cape Adare Long Term Moorings (CALM): Analysis Phase; Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000495", "repository": "USAP-DC", "title": "Cape Adare Long Term Moorings (CALM): Analysis Phase"}, {"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Processed CTD Data from the Larsen Ice Shelf near Antarctica acquired during the Nathaniel B. Palmer expedition NBP1203", "uid": "601348", "west": -63.0}, {"awards": "0732651 Gordon, Arnold; 1141890 Huber, Bruce", "bounds_geometry": ["POLYGON((-62 -61,-61.3 -61,-60.6 -61,-59.9 -61,-59.2 -61,-58.5 -61,-57.8 -61,-57.1 -61,-56.4 -61,-55.7 -61,-55 -61,-55 -61.44,-55 -61.88,-55 -62.32,-55 -62.76,-55 -63.2,-55 -63.64,-55 -64.08,-55 -64.52,-55 -64.96,-55 -65.4,-55.7 -65.4,-56.4 -65.4,-57.1 -65.4,-57.8 -65.4,-58.5 -65.4,-59.2 -65.4,-59.9 -65.4,-60.6 -65.4,-61.3 -65.4,-62 -65.4,-62 -64.96,-62 -64.52,-62 -64.08,-62 -63.64,-62 -63.2,-62 -62.76,-62 -62.32,-62 -61.88,-62 -61.44,-62 -61))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based LDEO LADCP Sonar during Nathaniel B. Palmer expedition NBP1203 conducted in 2012 (Chief Scientist: Dr. Maria Vernet; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement data and were processed after data collection. Funding was provided by NSF grant(s): ANT11-41890.", "east": -55.0, "geometry": ["POINT(-58.5 -63.2)"], "keywords": "Antarctica; Antarctic Peninsula; Current Measurements; LADCP; LARISSA; Larsen Ice Shelf; NBP1203; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer", "locations": "Antarctic Peninsula; Larsen Ice Shelf; Antarctica", "north": -61.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Integrated System Science", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Cape Adare Long Term Moorings (CALM): Analysis Phase; Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000495", "repository": "USAP-DC", "title": "Cape Adare Long Term Moorings (CALM): Analysis Phase"}, {"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.4, "title": "Processed ship-based LADCP Sonar Data from the Larsen Ice Shelf near Antarctica acquired during the Nathaniel B. Palmer expedition NBP1203", "uid": "601347", "west": -62.0}, {"awards": "0732467 Domack, Eugene; 0732651 Gordon, Arnold", "bounds_geometry": ["POLYGON((-68 -60,-66.7 -60,-65.4 -60,-64.1 -60,-62.8 -60,-61.5 -60,-60.2 -60,-58.9 -60,-57.6 -60,-56.3 -60,-55 -60,-55 -60.6,-55 -61.2,-55 -61.8,-55 -62.4,-55 -63,-55 -63.6,-55 -64.2,-55 -64.8,-55 -65.4,-55 -66,-56.3 -66,-57.6 -66,-58.9 -66,-60.2 -66,-61.5 -66,-62.8 -66,-64.1 -66,-65.4 -66,-66.7 -66,-68 -66,-68 -65.4,-68 -64.8,-68 -64.2,-68 -63.6,-68 -63,-68 -62.4,-68 -61.8,-68 -61.2,-68 -60.6,-68 -60))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based LDEO LADCP Sonar during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement data and were processed after data collection. Data were acquired as part of the project(s): Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA), and funding was provided by NSF grant(s): ANT07-32467.", "east": -55.0, "geometry": ["POINT(-61.5 -63)"], "keywords": "Antarctica; Antarctic Peninsula; Current Measurements; LADCP; Larsen Ice Shelf; NBP1001; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer", "locations": "Antarctic Peninsula; Larsen Ice Shelf; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans; Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences", "projects": [{"proj_uid": "p0000841", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences"}, {"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -66.0, "title": "Processed ship-based LADCP Sonar Data from the Larsen Ice Shelf in Antarctica acquired during the Nathaniel B. Palmer expedition NBP1001", "uid": "601346", "west": -68.0}, {"awards": "0732467 Domack, Eugene; 0732651 Gordon, Arnold", "bounds_geometry": ["POLYGON((-68 -60,-66.7 -60,-65.4 -60,-64.1 -60,-62.8 -60,-61.5 -60,-60.2 -60,-58.9 -60,-57.6 -60,-56.3 -60,-55 -60,-55 -60.6,-55 -61.2,-55 -61.8,-55 -62.4,-55 -63,-55 -63.6,-55 -64.2,-55 -64.8,-55 -65.4,-55 -66,-56.3 -66,-57.6 -66,-58.9 -66,-60.2 -66,-61.5 -66,-62.8 -66,-64.1 -66,-65.4 -66,-66.7 -66,-68 -66,-68 -65.4,-68 -64.8,-68 -64.2,-68 -63.6,-68 -63,-68 -62.4,-68 -61.8,-68 -61.2,-68 -60.6,-68 -60))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a Sea-Bird SBE 9Plus CTD during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Temperature, Current Measurement, and Salinity data and were processed after data collection. Data were acquired as part of the project(s): Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA), and funding was provided by NSF grant(s): ANT07-32467.", "east": -55.0, "geometry": ["POINT(-61.5 -63)"], "keywords": "Antarctica; Antarctic Peninsula; CTD; CTD Data; LARISSA; Larsen Ice Shelf; NBP1001; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer; Salinity; Temperature", "locations": "Antarctic Peninsula; Larsen Ice Shelf; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans; Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences", "projects": [{"proj_uid": "p0000841", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences"}, {"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -66.0, "title": "Processed CTD Data from the Larsen Ice Shelf in Antarctica acquired during the Nathaniel B. Palmer expedition NBP1001", "uid": "601345", "west": -68.0}, {"awards": "0732711 Smith, Craig; 1341669 DeMaster, David", "bounds_geometry": ["POLYGON((-61 -64,-60.5 -64,-60 -64,-59.5 -64,-59 -64,-58.5 -64,-58 -64,-57.5 -64,-57 -64,-56.5 -64,-56 -64,-56 -64.1,-56 -64.2,-56 -64.3,-56 -64.4,-56 -64.5,-56 -64.6,-56 -64.7,-56 -64.8,-56 -64.9,-56 -65,-56.5 -65,-57 -65,-57.5 -65,-58 -65,-58.5 -65,-59 -65,-59.5 -65,-60 -65,-60.5 -65,-61 -65,-61 -64.9,-61 -64.8,-61 -64.7,-61 -64.6,-61 -64.5,-61 -64.4,-61 -64.3,-61 -64.2,-61 -64.1,-61 -64))"], "date_created": "Fri, 19 Jun 2020 00:00:00 GMT", "description": "This file contains Pb-210 data from bulk sediments beneath the collapsed Larsen A Ice Shelf and C-14 data from the organic fraction of the same samples.", "east": -56.0, "geometry": ["POINT(-58.5 -64.5)"], "keywords": "Antarctica; Carbon-14; Larsen Ice Shelf; Lead-210; Marine Sediments; Radioisotope Analysis", "locations": "Larsen Ice Shelf; Antarctica", "north": -64.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Organisms and Ecosystems", "persons": "DeMaster, David; Taylor, Richard", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans; Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change", "projects": [{"proj_uid": "p0000382", "repository": "USAP-DC", "title": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change"}, {"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -65.0, "title": "Radioisotope data (C-14 and Pb-210) from bulk sediments, Larsen A Ice Shelf", "uid": "601336", "west": -61.0}, {"awards": "0636773 DeMaster, David; 1341669 DeMaster, David", "bounds_geometry": ["POLYGON((-71 -64,-70.4 -64,-69.8 -64,-69.2 -64,-68.6 -64,-68 -64,-67.4 -64,-66.8 -64,-66.2 -64,-65.6 -64,-65 -64,-65 -64.7,-65 -65.4,-65 -66.1,-65 -66.8,-65 -67.5,-65 -68.2,-65 -68.9,-65 -69.6,-65 -70.3,-65 -71,-65.6 -71,-66.2 -71,-66.8 -71,-67.4 -71,-68 -71,-68.6 -71,-69.2 -71,-69.8 -71,-70.4 -71,-71 -71,-71 -70.3,-71 -69.6,-71 -68.9,-71 -68.2,-71 -67.5,-71 -66.8,-71 -66.1,-71 -65.4,-71 -64.7,-71 -64))"], "date_created": "Mon, 11 May 2020 00:00:00 GMT", "description": "This data set is used to describe a new technique for assessing labile organic carbon (LOC) abundances and mean residence times in marine sediments. Radiocarbon is used to determine abundances of labile organic carbon and then a diagenetic organic carbon model, coupled with sediment biotrubation coefficients, is used to assess LOC mean residence times. ", "east": -65.0, "geometry": ["POINT(-68 -67.5)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Bioturbation Coefficients; Diagenesis; Labile Organic Carbon; LOC Mean Residence Times; Marguerite Bay; Oceans; Organic Carbon Degradation Rates; Sediment Core", "locations": "Antarctic Peninsula; Marguerite Bay; Antarctica", "north": -64.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Earth Sciences", "persons": "DeMaster, David; Taylor, Richard; Smith, Craig; Isla, Enrique; Thomas, Carrie", "project_titles": "Collaborative Research: Benthic Faunal Feeding Dynamics on the Antarctic Shelf and the Effects of Global Climate Change on Bentho-Pelagic Coupling; Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change", "projects": [{"proj_uid": "p0000552", "repository": "USAP-DC", "title": "Collaborative Research: Benthic Faunal Feeding Dynamics on the Antarctic Shelf and the Effects of Global Climate Change on Bentho-Pelagic Coupling"}, {"proj_uid": "p0000382", "repository": "USAP-DC", "title": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.0, "title": "Labile Organic Carbon distributions on the West Antarctic Peninsula Shelf", "uid": "601319", "west": -71.0}, {"awards": null, "bounds_geometry": ["POINT(-168.626 -82.375)"], "date_created": "Tue, 05 May 2020 00:00:00 GMT", "description": "The Ross Ice Shelf Project (RISP) began in 1973, and lasted six field seasons. One of the primary goals for RISP was to drill a hole through the Ross Ice Shelf in order to study the ice, the ocean, and the ocean floor beneath the ice shelf. In late November 1974, during the second field season, the camp at J-9 (82.375S, 168.626W) was established, and this site was chosen for future deep core drilling.\r\nThis datset records ice shelf and sub-ice shelf temperature profiles taken between 1974 and 1977 at the J9 drill site in The Ross Ice Shelf. ", "east": -168.626, "geometry": ["POINT(-168.626 -82.375)"], "keywords": "Antarctica; Ross Ice Shelf", "locations": "Ross Ice Shelf; Antarctica", "north": -82.375, "nsf_funding_programs": null, "persons": "Clough, John", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -82.375, "title": "J-9 Drill Hole Temperatures", "uid": "601316", "west": -168.626}, {"awards": "0732711 Smith, Craig; 1341669 DeMaster, David", "bounds_geometry": ["POLYGON((-61 -62,-60.4 -62,-59.8 -62,-59.2 -62,-58.6 -62,-58 -62,-57.4 -62,-56.8 -62,-56.2 -62,-55.6 -62,-55 -62,-55 -62.34,-55 -62.68,-55 -63.02,-55 -63.36,-55 -63.7,-55 -64.04,-55 -64.38,-55 -64.72,-55 -65.06,-55 -65.4,-55.6 -65.4,-56.2 -65.4,-56.8 -65.4,-57.4 -65.4,-58 -65.4,-58.6 -65.4,-59.2 -65.4,-59.8 -65.4,-60.4 -65.4,-61 -65.4,-61 -65.06,-61 -64.72,-61 -64.38,-61 -64.04,-61 -63.7,-61 -63.36,-61 -63.02,-61 -62.68,-61 -62.34,-61 -62))"], "date_created": "Fri, 01 May 2020 00:00:00 GMT", "description": "Species Abundance Data from the Larsen Ice Shelf Ice acquired during R/V Nathaniel B. Palmer expedition NBP1203. Data were acquired as part of the project(s): Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems (LARISSA); and Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change.", "east": -55.0, "geometry": ["POINT(-58 -63.7)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Box Corer; LARISSA; Larsen Ice Shelf; Macrofauna; Megafauna; NBP1203; Oceans; R/v Nathaniel B. Palmer; Seafloor Sampling; Species Abundance", "locations": "Larsen Ice Shelf; Antarctic Peninsula; Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Earth Sciences", "persons": "Smith, Craig", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems.; Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change", "projects": [{"proj_uid": "p0010135", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems."}, {"proj_uid": "p0000382", "repository": "USAP-DC", "title": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -65.4, "title": "Species Abundance Data from the Larsen Ice Shelf Ice acquired during R/V Nathaniel B. Palmer expedition NBP1203", "uid": "601304", "west": -61.0}, {"awards": "1143836 Leventer, Amy", "bounds_geometry": ["POLYGON((118 -65.5,118.3 -65.5,118.6 -65.5,118.9 -65.5,119.2 -65.5,119.5 -65.5,119.8 -65.5,120.1 -65.5,120.4 -65.5,120.7 -65.5,121 -65.5,121 -65.65,121 -65.8,121 -65.95,121 -66.1,121 -66.25,121 -66.4,121 -66.55,121 -66.7,121 -66.85,121 -67,120.7 -67,120.4 -67,120.1 -67,119.8 -67,119.5 -67,119.2 -67,118.9 -67,118.6 -67,118.3 -67,118 -67,118 -66.85,118 -66.7,118 -66.55,118 -66.4,118 -66.25,118 -66.1,118 -65.95,118 -65.8,118 -65.65,118 -65.5))"], "date_created": "Fri, 01 May 2020 00:00:00 GMT", "description": "This Biology Species Abundance data set was acquired with a ship-based Camera during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator: Dr. Craig Smith). The data file is in XLS format and includes Biology Species Abundance Biology data that has not been processed. The data was acquired as part of the project called Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA).", "east": 121.0, "geometry": ["POINT(119.5 -66.25)"], "keywords": "Antarctica; Benthic Images; Camera; East Antarctica; Marine Geoscience; NBP1402; Photo/video; Photo/Video; R/v Nathaniel B. Palmer; Sabrina Coast; Totten Glacier; Video Data; Yoyo Camera", "locations": "East Antarctica; Totten Glacier; Sabrina Coast; Antarctica", "north": -65.5, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Leventer, Amy; Post, Alexandra; Blankenship, Donald D.; Domack, Eugene Walter; Gulick, Sean; Huber, Bruce; Orsi, Alejandro; Shevenell, Amelia", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Near-bottom Videos from the Southern Ocean acquired during R/V Nathaniel B. Palmer expedition NBP1402", "uid": "601312", "west": 118.0}, {"awards": "0732711 Smith, Craig", "bounds_geometry": ["POLYGON((-69 -61,-67.6 -61,-66.2 -61,-64.8 -61,-63.4 -61,-62 -61,-60.6 -61,-59.2 -61,-57.8 -61,-56.4 -61,-55 -61,-55 -61.68,-55 -62.36,-55 -63.04,-55 -63.72,-55 -64.4,-55 -65.08,-55 -65.76,-55 -66.44,-55 -67.12,-55 -67.8,-56.4 -67.8,-57.8 -67.8,-59.2 -67.8,-60.6 -67.8,-62 -67.8,-63.4 -67.8,-64.8 -67.8,-66.2 -67.8,-67.6 -67.8,-69 -67.8,-69 -67.12,-69 -66.44,-69 -65.76,-69 -65.08,-69 -64.4,-69 -63.72,-69 -63.04,-69 -62.36,-69 -61.68,-69 -61))"], "date_created": "Fri, 01 May 2020 00:00:00 GMT", "description": "This Biology Species Abundance data set was acquired with a ship-based Camera during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator: Dr. Craig Smith). The data file is in XLS format and includes Biology Species Abundance Biology data that has not been processed. The data was acquired as part of the project called Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA).", "east": -55.0, "geometry": ["POINT(-62 -64.4)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Box Corer; LARISSA; Larsen Ice Shelf; Macrofauna; NBP1001; Oceans; R/v Nathaniel B. Palmer; Seafloor Sampling; Species Abundance", "locations": "Antarctic Peninsula; Larsen Ice Shelf; Larsen Ice Shelf; Antarctica", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Smith, Craig", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -67.8, "title": "Macrofauna Species Abundance Raw Data from the Larsen Ice Shelf acquired during the Nathaniel B. Palmer expedition NBP1001", "uid": "601306", "west": -69.0}, {"awards": "0732711 Smith, Craig", "bounds_geometry": ["POLYGON((-69 -61,-67.6 -61,-66.2 -61,-64.8 -61,-63.4 -61,-62 -61,-60.6 -61,-59.2 -61,-57.8 -61,-56.4 -61,-55 -61,-55 -61.68,-55 -62.36,-55 -63.04,-55 -63.72,-55 -64.4,-55 -65.08,-55 -65.76,-55 -66.44,-55 -67.12,-55 -67.8,-56.4 -67.8,-57.8 -67.8,-59.2 -67.8,-60.6 -67.8,-62 -67.8,-63.4 -67.8,-64.8 -67.8,-66.2 -67.8,-67.6 -67.8,-69 -67.8,-69 -67.12,-69 -66.44,-69 -65.76,-69 -65.08,-69 -64.4,-69 -63.72,-69 -63.04,-69 -62.36,-69 -61.68,-69 -61))"], "date_created": "Fri, 01 May 2020 00:00:00 GMT", "description": "This Biology Species Abundance data set was acquired with a ship-based Camera during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator: Dr. Craig Smith). The data file is in XLS format and includes Biology Species Abundance Biology data that has not been processed. The data was acquired as part of the project called Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA).", "east": -55.0, "geometry": ["POINT(-62 -64.4)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Box Corer; LARISSA; Larsen Ice Shelf; Macrofauna; Megafauna; NBP1001; Oceans; R/v Nathaniel B. Palmer; Seafloor Sampling; Species Abundance", "locations": "Antarctic Peninsula; Larsen Ice Shelf; Antarctica", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Smith, Craig", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -67.8, "title": "Megafauna Species Abundance Raw Data from the Larsen Ice Shelf acquired during the Nathaniel B. Palmer expedition NBP1001", "uid": "601305", "west": -69.0}, {"awards": "1443677 Padman, Laurence", "bounds_geometry": ["POLYGON((-180 -68,-175.85 -68,-171.7 -68,-167.55 -68,-163.4 -68,-159.25 -68,-155.1 -68,-150.95 -68,-146.8 -68,-142.65 -68,-138.5 -68,-138.5 -69.7,-138.5 -71.4,-138.5 -73.1,-138.5 -74.8,-138.5 -76.5,-138.5 -78.2,-138.5 -79.9,-138.5 -81.6,-138.5 -83.3,-138.5 -85,-142.65 -85,-146.8 -85,-150.95 -85,-155.1 -85,-159.25 -85,-163.4 -85,-167.55 -85,-171.7 -85,-175.85 -85,180 -85,177.4 -85,174.8 -85,172.2 -85,169.6 -85,167 -85,164.4 -85,161.8 -85,159.2 -85,156.6 -85,154 -85,154 -83.3,154 -81.6,154 -79.9,154 -78.2,154 -76.5,154 -74.8,154 -73.1,154 -71.4,154 -69.7,154 -68,156.6 -68,159.2 -68,161.8 -68,164.4 -68,167 -68,169.6 -68,172.2 -68,174.8 -68,177.4 -68,-180 -68))"], "date_created": "Fri, 14 Feb 2020 00:00:00 GMT", "description": "This dataset contains a regional ocean-ice shelf model used to support and interpret the ROSETTA-Ice field program. A gzipped tar file containing the regional ROMS model code, configuration files, input files, and selected output files. The model simulation covers three years following a ten year spin up. Two sets of output files from the simulation are included. The first is the complete model output (T,S,u,v, etc.) averaged over 30 day intervals. The second is selected variable (T, S, and passive dye tracers) averaged over one day. Included Matlab scripts process these daily passive dye files into water masses and make a simple movie of the time evolution of the water mass distributions. For futher information, see the Supplemental Information of the associated publication (Tinto et al., 2019).\r\n\r\n", "east": 154.0, "geometry": ["POINT(-172.25 -76.5)"], "keywords": "Antarctica; Basal Melt; Ice Shelf; Model Output; Ocean Circulation Model; Ross Ice Shelf; Ross Sea", "locations": "Ross Sea; Ross Sea; Ross Ice Shelf; Antarctica", "north": -68.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Springer, Scott; Howard, Susan L.; Padman, Laurence", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)", "projects": [{"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Ross Sea ocean model simulation used to support ROSETTA-Ice ", "uid": "601255", "west": -138.5}, {"awards": "0839059 Powell, Ross", "bounds_geometry": ["POLYGON((-180 -80,-174 -80,-168 -80,-162 -80,-156 -80,-150 -80,-144 -80,-138 -80,-132 -80,-126 -80,-120 -80,-120 -80.5,-120 -81,-120 -81.5,-120 -82,-120 -82.5,-120 -83,-120 -83.5,-120 -84,-120 -84.5,-120 -85,-126 -85,-132 -85,-138 -85,-144 -85,-150 -85,-156 -85,-162 -85,-168 -85,-174 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -84.5,180 -84,180 -83.5,180 -83,180 -82.5,180 -82,180 -81.5,180 -81,180 -80.5,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,-180 -80))"], "date_created": "Fri, 17 Jan 2020 00:00:00 GMT", "description": "This data set includes counts of palynomorphs from subglacial and sub-ice shelf tills from beneath the West Antarctic Ice Sheet. In addition to counts the biostratigraphic ranges are presented on separate tabs. ", "east": -120.0, "geometry": ["POINT(-150 -82.5)"], "keywords": "Antarctica; Pollen; West Antarctica; WISSARD", "locations": "West Antarctica; West Antarctica; Antarctica", "north": -80.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Coenen, Jason; Baudoin, Patrick; Warny, Sophie; Askin, Rosemary; Scherer, Reed Paul; Casta\u00f1eda, Isla", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WISSARD", "south": -85.0, "title": "Paleogene marine and terrestrial development of the West Antarctic Rift System: Palynomorph Data Set", "uid": "601245", "west": 180.0}, {"awards": "1443534 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"], "date_created": "Fri, 10 Jan 2020 00:00:00 GMT", "description": "This dataset was produced for the manuscript \\\"Multi-decadal basal melt rates and structure of the Ross Ice Shelf, Antarctica using airborne ice penetrating radar\\\" by Das et al., 2020 in Journal of Geophysical Research-Earth Surface. It has total ice thickness, thickness of the LMI layer, strain induced thickness change, basal melt rates and the error estimate for basal melt rates.", "east": 161.0, "geometry": ["POINT(-174.5 -81.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Penetrating Radar; Ice-Shelf Basal Melting; Radar Echo Sounder; Radar Echo Sounding; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Das, Indrani; Padman, Laurence; Bell, Robin; Fricker, Helen; Hulbe, Christina; Siddoway, Christine; Dhakal, Tejendra; Frearson, Nicholas; Mosbeux, Cyrille; Cordero, Isabel; Siegfried, Matt; Tinto, Kirsty", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)", "projects": [{"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Basal Melt, Ice thickness and structure of the Ross Ice Shelf using airborne radar data", "uid": "601242", "west": -150.0}, {"awards": "9896041 Padman, Laurence; 1443677 Padman, Laurence", "bounds_geometry": ["POLYGON((-180 -40.231,-144 -40.231,-108 -40.231,-72 -40.231,-36 -40.231,0 -40.231,36 -40.231,72 -40.231,108 -40.231,144 -40.231,180 -40.231,180 -45.2079,180 -50.1848,180 -55.1617,180 -60.1386,180 -65.1155,180 -70.0924,180 -75.0693,180 -80.0462,180 -85.0231,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85.0231,-180 -80.0462,-180 -75.0693,-180 -70.0924,-180 -65.1155,-180 -60.1386,-180 -55.1617,-180 -50.1848,-180 -45.2079,-180 -40.231))"], "date_created": "Thu, 19 Dec 2019 00:00:00 GMT", "description": "CATS2008 is a regional inverse barotropic tide model for the circum-Antarctic ocean on a 4 km grid. The model domain includes ocean cavities under the floating ice shelves. The coastline is based on the MODIS MOA [Scambos et al., 2007; Remote Sensing of Environment] feature identification files, adjusted to match ICESat-derived grounding lines for the Ross and Filchner-Ronne ice shelves and Interferometric Synthetic Aperture Radar (InSAR) grounding lines. The water depth map for open water is based on the 2007 release update to Smith and Sandwell [1997; Science]. Adjustments to this map have been made in various regions, including the open continental shelf in front of the Larsen-C Ice Shelf which has been blended with GEBCO bathymetry.\r\n\nModel type: Tides only; Inverse (data assimilation); barotropic (no vertical variation of currents). \nGrid: 4-km uniform polar stereographic (centered at 71 degrees S, 70 degrees W) \nConstituents: M2, S2, N2, K2, K1, O1, P1, Q1, Mf, Mm. \nUnits: z (sea surface height; meters); u,v (currents; cm/s); U,V (transports; m2/s). \nCoordinates: Currents (u, v) and depth-integrated transports (U, V) are given as East (u, U) and North (v, V) components. \nCitation: \"\u2026 an update to the inverse model described by Padman et al. [2002].\" \n\nSee CATS2008_README.pdf for further details.\r", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Inverse Modeling; Model Data; Ocean Currents; Sea Surface; Tidal Models; Tides", "locations": "Sea Surface; Antarctica", "north": -40.231, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Howard, Susan L.; Padman, Laurence; Erofeeva, Svetlana", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE); Ocean Tides around Antarctica and in the Southern Ocean", "projects": [{"proj_uid": "p0010116", "repository": "USAP-DC", "title": "Ocean Tides around Antarctica and in the Southern Ocean"}, {"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "CATS2008: Circum-Antarctic Tidal Simulation version 2008", "uid": "601235", "west": -180.0}, {"awards": "1443420 Dodd, Justin", "bounds_geometry": ["POINT(167.083333 -77.888889)"], "date_created": "Sun, 27 Oct 2019 00:00:00 GMT", "description": "The Andrill-1B (AND-1B) sediment core from under the Ross Ice Shelf in McMurdo Sound, Antarctica, recovered a mid to late Pliocene (~4.68 to 3.44 Ma) age diatomite unit with d18Odiatom values that range from +32.6 to +37.6 \u2030 (n=50 ", "east": 167.083333, "geometry": ["POINT(167.083333 -77.888889)"], "keywords": "And-1B; Andrill; Antarctica; Chemistry:sediment; Chemistry:Sediment; Delta 18O; Diatom; Mass Spectrometer; Oxygen Isotope; Paleoclimate; Pliocene; Sediment; Wais Project; West Antarctic Ice Sheet", "locations": "West Antarctic Ice Sheet; Antarctica", "north": -77.888889, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Dodd, Justin; Abbott, Tirzah", "project_titles": "Diatom and Oxygen Isotope Evidence of Pliocene Antarctic Ice Sheet Dynamics and Ross Sea Paleoceanography", "projects": [{"proj_uid": "p0010042", "repository": "USAP-DC", "title": "Diatom and Oxygen Isotope Evidence of Pliocene Antarctic Ice Sheet Dynamics and Ross Sea Paleoceanography"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ANDRILL", "south": -77.888889, "title": "Diatom Oxygen Isotope Evidence of Pliocene (~4.68 to 3.44 Ma) Antarctic Ice Sheet Dynamics and Ross Sea Paleoceanography", "uid": "601220", "west": 167.083333}, {"awards": "0732625 Leventer, Amy; 9714371 Leventer, Amy", "bounds_geometry": ["POLYGON((-64 -63,-63.1 -63,-62.2 -63,-61.3 -63,-60.4 -63,-59.5 -63,-58.6 -63,-57.7 -63,-56.8 -63,-55.9 -63,-55 -63,-55 -63.4,-55 -63.8,-55 -64.2,-55 -64.6,-55 -65,-55 -65.4,-55 -65.8,-55 -66.2,-55 -66.6,-55 -67,-55.9 -67,-56.8 -67,-57.7 -67,-58.6 -67,-59.5 -67,-60.4 -67,-61.3 -67,-62.2 -67,-63.1 -67,-64 -67,-64 -66.6,-64 -66.2,-64 -65.8,-64 -65.4,-64 -65,-64 -64.6,-64 -64.2,-64 -63.8,-64 -63.4,-64 -63))"], "date_created": "Mon, 16 Sep 2019 00:00:00 GMT", "description": "Diatom data from eastern side of Antarctic Peninsula:\r\n\r\nThis file includes quantitative diatom data for surface samples collected on numerous cruises to the eastern side of the Antarctic Peninsula, including NBP0003, NBP0107, LMG0502, NBP0603, and NBP1203. Samples were collected using a variety of tools including Smith-McIntyre Grab, Kasten Core and Jumbo Kasten Core. These data were generated by Amy Leventer (aleventer@colgate.edu) and undergraduate students at Colgate University. All questions regarding the specifics of these data should be directed to Amy Leventer. \r\n\r\nQuantitative diatom slides were prepared according to the settling technique of Scherer (1995). Cover slips were adhered to the slides using Norland Optical Adhesive #61. Slides were observed under Olympus CX31, BX50 and BX60, and Zeiss Primo Star light microscopes, using a 100X oil immersion objective for a total magnification of 1000X. A minimum of 400 valves or 10 transects was counted for each slide, depending on the absolute diatom abundance. Valves were only counted if \u003e50% complete. Diatoms were identified to species level when possible (Crosta et al., 2005; Armand et al., 2005; Cefarelli et al., 2010).\r\n\r\nArmand, L.K., X. Crosta, O. Romero, J. J. Pichon (2005), The biogeography of major diatom taxa in Southern Ocean sediments: 1. Sea ice related species, Paleogeography, Paleoclimatology, Paleoecology, 223, 93-126. \r\n\r\nCefarelli, A.O., M. E. Ferrario, G. O. Almandoz, A. G. Atencio, R. Akselman, M. Vernet (2010), Diversity of the diatom genus Fragilariopsis in the Argentine Sea and Antarctic waters: morphology, distribution and abundance, Polar Biology, 33(2), 1463-1484. \r\n\r\nCrosta, X., O. Romero, L. K. Armand, J. Pichon (2005), The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species, Palaeogeography, Palaeoclimatology, Palaeoecology, 223, 66-92. \r\n\r\nScherer, R. P., A new method for the determination of absolute abundance of diatoms and other silt-sized sedimentary particles, J. Paleolimnol., 12, 171\u2013178, 1995.\r\n", "east": -55.0, "geometry": ["POINT(-59.5 -65)"], "keywords": "Antarctica; Antarctic Peninsula; Benthos; Biota; Diatom; Geology/Geophysics - Other; LMG0502; Marine Geoscience; Marine Sediments; Microscope; NBP0003; NBP0107; NBP0603; NBP1203; R/v Nathaniel B. Palmer; Surface Sediment", "locations": "Antarctic Peninsula; Antarctica", "north": -63.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Ocean and Atmospheric Sciences", "persons": "Leventer, Amy", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -67.0, "title": "Easten Antarctic Peninsula Surface Sediment Diatom Data", "uid": "601211", "west": -64.0}, {"awards": "1443552 Paul Winberry, J.; 1443356 Conway, Howard", "bounds_geometry": ["POLYGON((-174.95 -82.65,-174.35 -82.65,-173.75 -82.65,-173.15 -82.65,-172.55 -82.65,-171.95 -82.65,-171.35 -82.65,-170.75 -82.65,-170.15 -82.65,-169.55 -82.65,-168.95 -82.65,-168.95 -82.729,-168.95 -82.808,-168.95 -82.887,-168.95 -82.966,-168.95 -83.045,-168.95 -83.124,-168.95 -83.203,-168.95 -83.282,-168.95 -83.361,-168.95 -83.44,-169.55 -83.44,-170.15 -83.44,-170.75 -83.44,-171.35 -83.44,-171.95 -83.44,-172.55 -83.44,-173.15 -83.44,-173.75 -83.44,-174.35 -83.44,-174.95 -83.44,-174.95 -83.361,-174.95 -83.282,-174.95 -83.203,-174.95 -83.124,-174.95 -83.045,-174.95 -82.966,-174.95 -82.887,-174.95 -82.808,-174.95 -82.729,-174.95 -82.65))"], "date_created": "Mon, 20 May 2019 00:00:00 GMT", "description": "This data set contains radar-detected measurements of surface topography, internal stratigraphy, ice thickness and derived bed topography across Crary Ice Rise in the Ross Sea Embayment.", "east": -168.95, "geometry": ["POINT(-171.95 -83.045)"], "keywords": "Antarctica; Bed Elevation; Crary Ice Rise; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Ice Penetrating Radar; Ice Sheet Elevation; Ice Shelf; Ice Thickness; Internal Stratigraphy; Radar; Ross Ice Shelf; Snow/ice; Snow/Ice; Surface Elevation", "locations": "Ross Ice Shelf; Crary Ice Rise; Antarctica", "north": -82.65, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Conway, Howard; Koutnik, Michelle; Winberry, Paul; Paden, John", "project_titles": "Collaborative Research: Grounding Line Dynamics: Crary Ice Rise Revisited", "projects": [{"proj_uid": "p0010026", "repository": "USAP-DC", "title": "Collaborative Research: Grounding Line Dynamics: Crary Ice Rise Revisited"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.44, "title": "Geophysical data from Crary Ice Rise, Ross Sea Embayment", "uid": "601181", "west": -174.95}, {"awards": "1246378 Shevenell, Amelia", "bounds_geometry": ["POLYGON((70 -68,70.5 -68,71 -68,71.5 -68,72 -68,72.5 -68,73 -68,73.5 -68,74 -68,74.5 -68,75 -68,75 -68.2,75 -68.4,75 -68.6,75 -68.8,75 -69,75 -69.2,75 -69.4,75 -69.6,75 -69.8,75 -70,74.5 -70,74 -70,73.5 -70,73 -70,72.5 -70,72 -70,71.5 -70,71 -70,70.5 -70,70 -70,70 -69.8,70 -69.6,70 -69.4,70 -69.2,70 -69,70 -68.8,70 -68.6,70 -68.4,70 -68.2,70 -68))"], "date_created": "Fri, 10 May 2019 00:00:00 GMT", "description": "This dataset contains 14C data, magnetic susceptibility, relative grain size percentages, 10Be", "east": 75.0, "geometry": ["POINT(72.5 -69)"], "keywords": "Antarctica; Be-10; Glaciers/ice Sheet; Glaciers/Ice Sheet; Grain Size; Late Quaternary; Magnetic Susceptibility; Mass Spectrometry; NBP0101; Paleoenvironment; Prydz Bay; Radiocarbon; R/v Nathaniel B. Palmer; Sediment; Sediment Core; Sediment Core Data", "locations": "Prydz Bay; Antarctica", "north": -68.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Shevenell, Amelia", "project_titles": "Late Quaternary Evolution of the Lambert Glacier/Amery Ice Shelf System, Prydz Bay, Antarctica", "projects": [{"proj_uid": "p0000381", "repository": "USAP-DC", "title": "Late Quaternary Evolution of the Lambert Glacier/Amery Ice Shelf System, Prydz Bay, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Geochemical and sedimentologic data from NBP01-01 JPC-34", "uid": "601180", "west": 70.0}, {"awards": "1822289 Vernet, Maria", "bounds_geometry": ["POLYGON((-59.402149 -62.131908,-58.9639887 -62.131908,-58.5258284 -62.131908,-58.0876681 -62.131908,-57.6495078 -62.131908,-57.2113475 -62.131908,-56.7731872 -62.131908,-56.3350269 -62.131908,-55.8968666 -62.131908,-55.4587063 -62.131908,-55.020546 -62.131908,-55.020546 -62.384829,-55.020546 -62.63775,-55.020546 -62.890671,-55.020546 -63.143592,-55.020546 -63.396513,-55.020546 -63.649434,-55.020546 -63.902355,-55.020546 -64.155276,-55.020546 -64.408197,-55.020546 -64.661118,-55.4587063 -64.661118,-55.8968666 -64.661118,-56.3350269 -64.661118,-56.7731872 -64.661118,-57.2113475 -64.661118,-57.6495078 -64.661118,-58.0876681 -64.661118,-58.5258284 -64.661118,-58.9639887 -64.661118,-59.402149 -64.661118,-59.402149 -64.408197,-59.402149 -64.155276,-59.402149 -63.902355,-59.402149 -63.649434,-59.402149 -63.396513,-59.402149 -63.143592,-59.402149 -62.890671,-59.402149 -62.63775,-59.402149 -62.384829,-59.402149 -62.131908))"], "date_created": "Mon, 29 Apr 2019 00:00:00 GMT", "description": "Marine ecosystems under large ice shelves are thought to contain sparse, low-diversity plankton and seafloor communities due the low supply of food from productive sunlight waters. Past studies have shown sub-ice shelf ecosystems to change in response to altered oceanographic processes resulting from ice-shelve retreat. However, information on community changes and ecosystem structure under ice shelves are limited because sub-ice-shelf ecosystems have either been sampled many years after ice-shelf breakout, or have been sampled through small boreholes, yielding extremely limited spatial information. The recent breakout of the A-68 iceberg from the Larsen C ice shelf in the western Weddell Sea provides an opportunity to use a ship-based study to evaluate benthic communities and water column characteristics in an area recently vacated by a large overlying ice shelf. The opportunity will allow spatial assessments at the time of transition from an under ice-shelf environment to one initially exposed to conditions more typical of a coastal Antarctic marine setting. \r\n\r\n\r\n\r\nThis RAPID project will help determine the state of a coastal Antarctic ecosystem newly exposed from ice-shelf cover and will aid in understanding of rates of community change during transition. The project will conduct a 10-day field program, allowing contrasts to be made of phytoplankton and seafloor megafaunal communities in areas recently exposed by ice-shelf loss to areas exposed for many decades. The project will be undertaken in a collaborative manner with the South Korean Antarctic Agency, KOPRI, by participating in a cruise in March/May 2018. Combining new information in the area of Larsen C with existing observations after the Larsen A and B ice shelf breakups further to the north, the project is expected to generate a dataset that can elucidate fundamental processes of planktonic and benthic community development in transition from food-poor to food-rich ecosystems. The project will provide field experience to two graduate students, a post-doctoral associate and an undergraduate student. Material from the project will be incorporated into graduate courses and the project will communicate daily work and unfolding events through social media and blogs while they explore this area of the world that is largely underexplored.", "east": -55.020546, "geometry": ["POINT(-57.2113475 -63.396513)"], "keywords": "Antarctica; Biota; Chlorophyll; CTD; Glacier; Iceberg; Ice Shelf; Larsen C Ice Shelf; Oceans; Physical Oceanography; Phytoplankton; Sample Location; Sea Ice; Southern Ocean; Station List", "locations": "Larsen C Ice Shelf; Southern Ocean; Antarctica", "north": -62.131908, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Pan, B. Jack; Vernet, Maria", "project_titles": "RAPID: Collaborative Research: Marine Ecosystem Response to the Larsen C Ice-Shelf Breakout: \"Time zero\"", "projects": [{"proj_uid": "p0010029", "repository": "USAP-DC", "title": "RAPID: Collaborative Research: Marine Ecosystem Response to the Larsen C Ice-Shelf Breakout: \"Time zero\""}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.661118, "title": "CTD stations and logs for Araon 2018 ANA08D expedition to Larson C", "uid": "601178", "west": -59.402149}, {"awards": "1743326 Kingslake, Jonathan", "bounds_geometry": null, "date_created": "Fri, 22 Mar 2019 00:00:00 GMT", "description": "In February 2018, we hosted a workshop on Antarctic Surface Hydrology and Future Ice-shelf Stability at Lamont-Doherty Earth Observatory, Palisades, New York. Funding for the workshop was provided by the\r\nU.S. National Science Foundation (NSF) Antarctic Glaciology Program (award number: 1743326). The\r\naims of the workshop were to: (1) establish the state-of-the-science of Antarctic surface hydrology; (2)\r\nidentify key science questions raised by observations and theoretical studies of Antarctic surface\r\nhydrology, and (3) move the community toward answering these questions by bringing together scientists\r\nwith diverse expertise. The workshop was motivated by the premise that significant gains in our\r\nunderstanding can be made if researchers with interests in this field are provided with an opportunity to\r\ncommunicate and develop collaborations across disciplines.\r\n\r\nHere we report on the organisation, attendance, and structure of the workshop, before summarizing key\r\nscience outcomes, research questions, and future priorities that emerged during the workshop within the\r\nfollowing four themes:\r\n1. Surface melting: controls and observations\r\n2. Water ponding and flow\r\n3. Impact of meltwater on ice-shelf stability\r\n4. Ice-sheet/climate modeling\r\n\r\nFinally, building on the emergent science questions, we propose a framework for prioritizing future work,\r\naimed at understanding and predicting the impact that surface meltwater will have on future Antarctic Ice\r\nSheet mass balance.", "east": null, "geometry": null, "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hydrology; Ice Sheet Stability; Ice Shelf; Report; Workshop", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kingslake, Jonathan; Trusel, Luke; Banwell, Alison; Bell, Robin; Das, Indrani; DeConto, Robert; Tedesco, Marco; Lenaerts, Jan; Schoof, Christian", "project_titles": "Workshop on Antarctic Surface Hydrology and Future Ice-shelf Stability", "projects": [{"proj_uid": "p0010021", "repository": "USAP-DC", "title": "Workshop on Antarctic Surface Hydrology and Future Ice-shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Report on Antarctic surface hydrology workshop, LDEO, 2018", "uid": "601170", "west": null}, {"awards": "0838947 Tulaczyk, Slawek", "bounds_geometry": ["POLYGON((-165.28 -84.24,-165.086 -84.24,-164.892 -84.24,-164.698 -84.24,-164.504 -84.24,-164.31 -84.24,-164.116 -84.24,-163.922 -84.24,-163.728 -84.24,-163.534 -84.24,-163.34 -84.24,-163.34 -84.252,-163.34 -84.264,-163.34 -84.276,-163.34 -84.288,-163.34 -84.3,-163.34 -84.312,-163.34 -84.324,-163.34 -84.336,-163.34 -84.348,-163.34 -84.36,-163.534 -84.36,-163.728 -84.36,-163.922 -84.36,-164.116 -84.36,-164.31 -84.36,-164.504 -84.36,-164.698 -84.36,-164.892 -84.36,-165.086 -84.36,-165.28 -84.36,-165.28 -84.348,-165.28 -84.336,-165.28 -84.324,-165.28 -84.312,-165.28 -84.3,-165.28 -84.288,-165.28 -84.276,-165.28 -84.264,-165.28 -84.252,-165.28 -84.24))"], "date_created": "Sun, 09 Sep 2018 00:00:00 GMT", "description": "This dataset contains ice-shelf basal melt rates and vertical strain rates for 11 sites near the Whillans Ice Stream grounding line. These rates were determined using Autonomous Phase-Sensitive Radar. Data processing is described in Begeman et al. 2018, JGR Oceans. These sites are concentrated within an embayment of the Ross Ice Shelf. These melt rates and strain rates were determined over periods ranging from 10 to 38 days in December 2014 to January 2015. ", "east": -163.34, "geometry": ["POINT(-164.31 -84.3)"], "keywords": "Antarctica; Flexure Zone; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Ice-Shelf Basal Melting; Ice-Shelf Strain Rate", "locations": "Antarctica", "north": -84.24, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Begeman, Carolyn", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WISSARD", "south": -84.36, "title": "Basal melt rates of the Ross Ice Shelf near the Whillans Ice Stream grounding line", "uid": "601122", "west": -165.28}, {"awards": null, "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, 05 Sep 2018 00:00:00 GMT", "description": "In this data set we present observations of locations of surface crevasses in Antarctica collected from satellite images for the period between 2011 and 2015 for 46 ice shelf regions.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Crevasses; Fractures; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Ice Shelf; Satellite Remote Sensing", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Emetc, Veronika", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Location of surface crevasses in Antarctica", "uid": "601117", "west": -180.0}, {"awards": "1443126 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((165.911079 -77.872851,165.941267 -77.872851,165.971455 -77.872851,166.001643 -77.872851,166.031831 -77.872851,166.062019 -77.872851,166.092207 -77.872851,166.122395 -77.872851,166.152583 -77.872851,166.182771 -77.872851,166.212959 -77.872851,166.212959 -77.8781411,166.212959 -77.8834312,166.212959 -77.8887213,166.212959 -77.8940114,166.212959 -77.8993015,166.212959 -77.9045916,166.212959 -77.9098817,166.212959 -77.9151718,166.212959 -77.9204619,166.212959 -77.925752,166.182771 -77.925752,166.152583 -77.925752,166.122395 -77.925752,166.092207 -77.925752,166.062019 -77.925752,166.031831 -77.925752,166.001643 -77.925752,165.971455 -77.925752,165.941267 -77.925752,165.911079 -77.925752,165.911079 -77.9204619,165.911079 -77.9151718,165.911079 -77.9098817,165.911079 -77.9045916,165.911079 -77.8993015,165.911079 -77.8940114,165.911079 -77.8887213,165.911079 -77.8834312,165.911079 -77.8781411,165.911079 -77.872851))"], "date_created": "Tue, 04 Sep 2018 00:00:00 GMT", "description": "During the melt seasons of 2015/6 and 2016/7, water pressure gages were deployed on the McMurdo Ice Shelf to observe water depth in supraglacial lakes and streams. This was done in support of research directed toward understanding how filling and draining supraglacial lakes would induce ice-shelf flexure and fracture.", "east": 166.212959, "geometry": ["POINT(166.062019 -77.8993015)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Snow/ice; Snow/Ice; Subglacial And Supraglacial Water Depth; Supraglacial Lake; Supraglacial Meltwater; Water Depth", "locations": "Antarctica", "north": -77.872851, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacAyeal, Douglas; Banwell, Alison", "project_titles": "Impact of Supraglacial Lakes on Ice-Shelf Stability", "projects": [{"proj_uid": "p0000138", "repository": "USAP-DC", "title": "Impact of Supraglacial Lakes on Ice-Shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.925752, "title": "Supraglacial Lake Depths on McMurdo Ice Shelf, Antarctica", "uid": "601116", "west": 165.911079}, {"awards": "1443126 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((166.152184 -77.902339,166.1559273 -77.902339,166.1596706 -77.902339,166.1634139 -77.902339,166.1671572 -77.902339,166.1709005 -77.902339,166.1746438 -77.902339,166.1783871 -77.902339,166.1821304 -77.902339,166.1858737 -77.902339,166.189617 -77.902339,166.189617 -77.9026372,166.189617 -77.9029354,166.189617 -77.9032336,166.189617 -77.9035318,166.189617 -77.90383,166.189617 -77.9041282,166.189617 -77.9044264,166.189617 -77.9047246,166.189617 -77.9050228,166.189617 -77.905321,166.1858737 -77.905321,166.1821304 -77.905321,166.1783871 -77.905321,166.1746438 -77.905321,166.1709005 -77.905321,166.1671572 -77.905321,166.1634139 -77.905321,166.1596706 -77.905321,166.1559273 -77.905321,166.152184 -77.905321,166.152184 -77.9050228,166.152184 -77.9047246,166.152184 -77.9044264,166.152184 -77.9041282,166.152184 -77.90383,166.152184 -77.9035318,166.152184 -77.9032336,166.152184 -77.9029354,166.152184 -77.9026372,166.152184 -77.902339))"], "date_created": "Fri, 31 Aug 2018 00:00:00 GMT", "description": "During the Austral summer melt season of 2016-2017, an automatic camera was placed overlooking a surface lake feature on the McMurdo Ice Shelf. This camera created a time-lapse video (30 minute photograph time intervals) used to observe the filling and draining of the lake called Rift-Tip Lake located approximately 2 km from the McMurdo Ice Shelf ice front. The data was used in support of a field project to measure the flexural response of the McMurdo Ice Shelf (and ice shelves in general) to the filling and draining of supraglacial lakes. The time-lapse video begins 16 November 2016 and ends 27 January 2017.", "east": 166.189617, "geometry": ["POINT(166.1709005 -77.90383)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Photo/video; Photo/Video; Supraglacial Meltwater", "locations": "Antarctica", "north": -77.902339, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "MacAyeal, Douglas; Banwell, Alison", "project_titles": "Impact of Supraglacial Lakes on Ice-Shelf Stability", "projects": [{"proj_uid": "p0000138", "repository": "USAP-DC", "title": "Impact of Supraglacial Lakes on Ice-Shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.905321, "title": "Time-lapse video of McMurdo Ice Shelf surface melting and hydrology", "uid": "601113", "west": 166.152184}, {"awards": "1443126 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((166.02819 -77.887495,166.053634 -77.887495,166.079078 -77.887495,166.104522 -77.887495,166.129966 -77.887495,166.15541 -77.887495,166.180854 -77.887495,166.206298 -77.887495,166.231742 -77.887495,166.257186 -77.887495,166.28263 -77.887495,166.28263 -77.8926145,166.28263 -77.897734,166.28263 -77.9028535,166.28263 -77.907973,166.28263 -77.9130925,166.28263 -77.918212,166.28263 -77.9233315,166.28263 -77.928451,166.28263 -77.9335705,166.28263 -77.93869,166.257186 -77.93869,166.231742 -77.93869,166.206298 -77.93869,166.180854 -77.93869,166.15541 -77.93869,166.129966 -77.93869,166.104522 -77.93869,166.079078 -77.93869,166.053634 -77.93869,166.02819 -77.93869,166.02819 -77.9335705,166.02819 -77.928451,166.02819 -77.9233315,166.02819 -77.918212,166.02819 -77.9130925,166.02819 -77.907973,166.02819 -77.9028535,166.02819 -77.897734,166.02819 -77.8926145,166.02819 -77.887495))"], "date_created": "Tue, 24 Jul 2018 00:00:00 GMT", "description": "Over 2 Austral summer periods in 2015/6 and 2016/17, up to 12 geodetic GPS receivers were deployed on the McMurdo Ice Shelf to study its vertical deflection in response to moving meltwater loads. (5 GPS were deployed in 2015/16, 12 in 2016/17.) The GPS receivers and antennas were supplied by UNAVCO and were Trimble NetR9\u2019s and Zephyr Geodetic, respectively. The GPS receivers were stationary for the entire field seasons (were never moved). Following each field season, the GPS data were processed using MIT software called TRACK, which is part of the GAMIT package. The UNAVCO-run base station at McMurdo Station, approximately 16 km away from the field area, was used as part of the processing.", "east": 166.28263, "geometry": ["POINT(166.15541 -77.9130925)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Ice Flow Velocity; Ice Shelf; Ice-Shelf Flexure; Snow/ice; Snow/Ice; Surface Melt", "locations": "Antarctica", "north": -77.887495, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacAyeal, Douglas; Banwell, Alison", "project_titles": "Impact of Supraglacial Lakes on Ice-Shelf Stability", "projects": [{"proj_uid": "p0000138", "repository": "USAP-DC", "title": "Impact of Supraglacial Lakes on Ice-Shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.93869, "title": "McMurdo Ice Shelf GPS survey of vertical motion", "uid": "601107", "west": 166.02819}, {"awards": "1443126 MacAyeal, Douglas", "bounds_geometry": ["POINT(166.521 -77.936)"], "date_created": "Fri, 20 Jul 2018 00:00:00 GMT", "description": "An automatic weather station was operated on the McMurdo Ice Shelf near Pegasus Air Strip for 365 days from 24 January 2016 to 22 January 2017. The sensors consisted of temperature/RH at 2 m and 8 m (above surface), wind speed at 2 m and 8 m, 4-component radiometer, and wind direction. Time series provides averages for every 30 minutes of a 30 second sample scheme.", "east": 166.521, "geometry": ["POINT(166.521 -77.936)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hydrology; Ice Shelf; Snow/ice; Snow/Ice; Surface Hydrology; Surface Mass Balance; Weather Station Data", "locations": "Antarctica", "north": -77.936, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Banwell, Alison; MacAyeal, Douglas", "project_titles": "Impact of Supraglacial Lakes on Ice-Shelf Stability", "projects": [{"proj_uid": "p0000138", "repository": "USAP-DC", "title": "Impact of Supraglacial Lakes on Ice-Shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.936, "title": "McMurdo Ice Shelf AWS data", "uid": "601106", "west": 166.521}, {"awards": "1644159 Jacobs, Stanley", "bounds_geometry": ["POLYGON((-115 -73.5,-114.5 -73.5,-114 -73.5,-113.5 -73.5,-113 -73.5,-112.5 -73.5,-112 -73.5,-111.5 -73.5,-111 -73.5,-110.5 -73.5,-110 -73.5,-110 -73.6,-110 -73.7,-110 -73.8,-110 -73.9,-110 -74,-110 -74.1,-110 -74.2,-110 -74.3,-110 -74.4,-110 -74.5,-110.5 -74.5,-111 -74.5,-111.5 -74.5,-112 -74.5,-112.5 -74.5,-113 -74.5,-113.5 -74.5,-114 -74.5,-114.5 -74.5,-115 -74.5,-115 -74.4,-115 -74.3,-115 -74.2,-115 -74.1,-115 -74,-115 -73.9,-115 -73.8,-115 -73.7,-115 -73.6,-115 -73.5))"], "date_created": "Thu, 12 Jul 2018 00:00:00 GMT", "description": "Collection of CTD and LADCP summer profile observations in front of Dotson ice shelf, West Antarctica, between 2000 and 2016. The data can also be obtained from the various investigators and data centers, including the British Oceanographic Data Centre, the National Oceanographic Data Center, and the Korean Oceanographic Data Center. This dataset is used in the publication by Jenkins and collaborators in Nature Geoscience, 2018, entitled West Antarctic Ice Sheet retreat in the Amundsen Sea driven by decadal oceanic variability.", "east": -110.0, "geometry": ["POINT(-112.5 -74)"], "keywords": "Amundsen Sea; Antarctica; Dotson Ice Shelf; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ocean Properties; Oceans; Physical Oceanography; West Antarctica", "locations": "West Antarctica; Amundsen Sea; Dotson Ice Shelf; Antarctica", "north": -73.5, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Dutrieux, Pierre; Jacobs, Stanley; Jenkins, Adrian; Stammerjohn, Sharon", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -74.5, "title": "CTDP/LADCP profile data along Dotson ice shelf calving front from 2000 to 2016", "uid": "601105", "west": -115.0}, {"awards": "1245915 Ray, Laura", "bounds_geometry": ["POLYGON((168.36 -78.03,168.384 -78.03,168.408 -78.03,168.432 -78.03,168.456 -78.03,168.48 -78.03,168.504 -78.03,168.528 -78.03,168.552 -78.03,168.576 -78.03,168.6 -78.03,168.6 -78.035,168.6 -78.04,168.6 -78.045,168.6 -78.05,168.6 -78.055,168.6 -78.06,168.6 -78.065,168.6 -78.07,168.6 -78.075,168.6 -78.08,168.576 -78.08,168.552 -78.08,168.528 -78.08,168.504 -78.08,168.48 -78.08,168.456 -78.08,168.432 -78.08,168.408 -78.08,168.384 -78.08,168.36 -78.08,168.36 -78.075,168.36 -78.07,168.36 -78.065,168.36 -78.06,168.36 -78.055,168.36 -78.05,168.36 -78.045,168.36 -78.04,168.36 -78.035,168.36 -78.03))"], "date_created": "Thu, 07 Jun 2018 00:00:00 GMT", "description": "This dataset is comprised of ground penetrating radar data (GSSI DZT format with DZG files for GPS location) of a 28 square km area conduced in the heavily crevassed McMurdo Shear Zone in two consecutive field seasons. A radar system comprised of a GSSI SIR-30 32-bit two-channel control unit and model 5103 \u201c400 MHz\u201d and Model 5106A \u201c200 MHz\u201d antenna units were used to conduct the GPR surveys. The radar system was mounted on a sled and towed by a robot. The robot surveyed the 5 x 5.7 km area on lines separated by 50-m and traveled from West to East and return. The 2014 survey was conducted between Oct 29, 2014 and Nov 9, 2014, and the 2015 survey was conducted between Oct 26, 2015 and Nov 1, 2015. The use of identical waypoints in each year provides an Eulerian sampling protocol, where sampled GPS locations remain fixed, but the ice moves between annual surveys. In 2014, the 400 MHz antenna imaged to a depth of 19 meters, and in 2015, the 400 MHz antenna imaged to a depth of 80 meters to examine englacial ice. In both years, the 200 MHz antenna imaged to a depth of 160 meters.", "east": 168.6, "geometry": ["POINT(168.48 -78.055)"], "keywords": "Antarctica; Firn; Folds; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -78.03, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Ray, Laura; Arcone, Steven; Kaluzienski, Lynn; Koons, Peter; Lever, Jim; Walker, Ben", "project_titles": "Collaborative Research: Flow and Fracture Dynamics in an Ice Shelf Lateral Margin: Observations and Modeling of the McMurdo Shear Zone", "projects": [{"proj_uid": "p0000701", "repository": "USAP-DC", "title": "Collaborative Research: Flow and Fracture Dynamics in an Ice Shelf Lateral Margin: Observations and Modeling of the McMurdo Shear Zone"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.08, "title": "Ground Penetrating Radar Grid Survey of the McMurdo Shear Zone", "uid": "601102", "west": 168.36}, {"awards": "1565576 Pettit, Erin", "bounds_geometry": ["POLYGON((-63 -64.75,-62.6 -64.75,-62.2 -64.75,-61.8 -64.75,-61.4 -64.75,-61 -64.75,-60.6 -64.75,-60.2 -64.75,-59.8 -64.75,-59.4 -64.75,-59 -64.75,-59 -64.9,-59 -65.05,-59 -65.2,-59 -65.35,-59 -65.5,-59 -65.65,-59 -65.8,-59 -65.95,-59 -66.1,-59 -66.25,-59.4 -66.25,-59.8 -66.25,-60.2 -66.25,-60.6 -66.25,-61 -66.25,-61.4 -66.25,-61.8 -66.25,-62.2 -66.25,-62.6 -66.25,-63 -66.25,-63 -66.1,-63 -65.95,-63 -65.8,-63 -65.65,-63 -65.5,-63 -65.35,-63 -65.2,-63 -65.05,-63 -64.9,-63 -64.75))"], "date_created": "Tue, 13 Feb 2018 00:00:00 GMT", "description": "Weather and instrument data from the Automated Meterology Ice Geophysics Observation System (AMIGOS) stations installed as part of the LARISSA and RAPID Scar Inlet funded grants from NSF-PLR. The data include temperature, wind, pressure, humidity, station position (coarse), and station health.", "east": -59.0, "geometry": ["POINT(-61 -65.5)"], "keywords": "Antarctica; Antarctic Peninsula; Atmosphere; Automated Weather Station; Flask Glacier; Foehn Winds; Glaciers/ice Sheet; Glaciers/Ice Sheet; LARISSA; Larsen B Ice Shelf; Meteorology; Scar Inlet; Weatherstation; Wind Speed", "locations": "Antarctic Peninsula; Larsen B Ice Shelf; Scar Inlet; Flask Glacier; Antarctica", "north": -64.75, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Integrated System Science", "persons": "Scambos, Ted", "project_titles": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf", "projects": [{"proj_uid": "p0000274", "repository": "USAP-DC", "title": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -66.25, "title": "Weather data from LARISSA / SCAR Inlet Rapid AMIGOS and cGPS stations", "uid": "601084", "west": -63.0}, {"awards": "1341669 DeMaster, David", "bounds_geometry": ["POLYGON((-70 -62,-68.8 -62,-67.6 -62,-66.4 -62,-65.2 -62,-64 -62,-62.8 -62,-61.6 -62,-60.4 -62,-59.2 -62,-58 -62,-58 -62.6,-58 -63.2,-58 -63.8,-58 -64.4,-58 -65,-58 -65.6,-58 -66.2,-58 -66.8,-58 -67.4,-58 -68,-59.2 -68,-60.4 -68,-61.6 -68,-62.8 -68,-64 -68,-65.2 -68,-66.4 -68,-67.6 -68,-68.8 -68,-70 -68,-70 -67.4,-70 -66.8,-70 -66.2,-70 -65.6,-70 -65,-70 -64.4,-70 -63.8,-70 -63.2,-70 -62.6,-70 -62))"], "date_created": "Sat, 03 Feb 2018 00:00:00 GMT", "description": "This file has C-14 data from the organic matter fraction of Antarctic marine sediments, collected from the collapsed Larsen Ice Shelf and the West Antarctic Peninsula", "east": -58.0, "geometry": ["POINT(-64 -65)"], "keywords": null, "locations": null, "north": -62.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "DeMaster, David", "project_titles": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change", "projects": [{"proj_uid": "p0000382", "repository": "USAP-DC", "title": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -68.0, "title": "DeMaster Compiled Larsen Ice Shelf and the West Antarctic Peninsula C14 Data", "uid": "601082", "west": -70.0}, {"awards": "1565576 Pettit, Erin", "bounds_geometry": ["POLYGON((-62.2 -65.5,-62.12 -65.5,-62.04 -65.5,-61.96 -65.5,-61.88 -65.5,-61.8 -65.5,-61.72 -65.5,-61.64 -65.5,-61.56 -65.5,-61.48 -65.5,-61.4 -65.5,-61.4 -65.53,-61.4 -65.56,-61.4 -65.59,-61.4 -65.62,-61.4 -65.65,-61.4 -65.68,-61.4 -65.71,-61.4 -65.74,-61.4 -65.77,-61.4 -65.8,-61.48 -65.8,-61.56 -65.8,-61.64 -65.8,-61.72 -65.8,-61.8 -65.8,-61.88 -65.8,-61.96 -65.8,-62.04 -65.8,-62.12 -65.8,-62.2 -65.8,-62.2 -65.77,-62.2 -65.74,-62.2 -65.71,-62.2 -65.68,-62.2 -65.65,-62.2 -65.62,-62.2 -65.59,-62.2 -65.56,-62.2 -65.53,-62.2 -65.5))"], "date_created": "Wed, 20 Dec 2017 00:00:00 GMT", "description": "A terrestrial radar interferometer was set up at a location overlooking a remnant of the Larsen B iceshelf and the adjacent fast ice. Images were acquired every 4 minutes with a Gamma Portable Radar Interferometer - 2. Data include images from two antennas, to allow the generation of interferometric DEMs, as well as line-of-sight displacement fields between consecutive images. The archived data are single-look complex (SLC) images, together with parameter files.", "east": -61.4, "geometry": ["POINT(-61.8 -65.65)"], "keywords": "Antarctica; Antarctic Peninsula; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Navigation; Radar; Radar Interferometer", "locations": "Antarctic Peninsula; Antarctica", "north": -65.5, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Glaciology", "persons": "Truffer, Martin", "project_titles": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf", "projects": [{"proj_uid": "p0000274", "repository": "USAP-DC", "title": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.8, "title": "Scar Inlet Terrestrial Radar Interferometry", "uid": "601078", "west": -62.2}, {"awards": "0732917 McCormick, Michael", "bounds_geometry": ["POLYGON((299.4 -63.1,299.92 -63.1,300.44 -63.1,300.96 -63.1,301.48 -63.1,302 -63.1,302.52 -63.1,303.04 -63.1,303.56 -63.1,304.08 -63.1,304.6 -63.1,304.6 -63.29,304.6 -63.48,304.6 -63.67,304.6 -63.86,304.6 -64.05,304.6 -64.24,304.6 -64.43,304.6 -64.62,304.6 -64.81,304.6 -65,304.08 -65,303.56 -65,303.04 -65,302.52 -65,302 -65,301.48 -65,300.96 -65,300.44 -65,299.92 -65,299.4 -65,299.4 -64.81,299.4 -64.62,299.4 -64.43,299.4 -64.24,299.4 -64.05,299.4 -63.86,299.4 -63.67,299.4 -63.48,299.4 -63.29,299.4 -63.1))"], "date_created": "Sun, 17 Dec 2017 00:00:00 GMT", "description": "Ice-shelf loss along the east coast of the Antarctic Peninsula over recent decades has brought new sources of carbon and energy to the marine benthos likely affecting sediment geochemistry and microbial community composition. To better understand the long-term effects of ice-shelf loss on benthic microbial communities, we conducted a five-station survey along a 160 km transect following the historic path of retreat of the Larsen A ice shelf. All microbial community sequence data is publicly available through the Metagenomics Analysis Server at Argonne National Laboratory (MG-RAST). The project title is \"Impact of ice-shelf loss on geochemical profiles and microbial community composition in marine sediments of the Larsen A embayment, Antarctic Peninsula\". A key word search using terms from this title at the MG-RAST portal (http://metagenomics.anl.gov/) will return the complete sample list. This submitted dataset summarizes the measured environmental parameters for these same samples (lat., long., water depth, sediment depth, pH, alkalinity, dissolved oxygen, silicate, phosphate, nitrate, nitrite, and ammonium).", "east": 304.6, "geometry": ["POINT(-58 -64.05)"], "keywords": "Antarctica; Antarctic Peninsula; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; LARISSA; Microbiology", "locations": "Antarctic Peninsula; Antarctica", "north": -63.1, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "McCormick, Michael", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems.", "projects": [{"proj_uid": "p0010135", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "LARISSA: Impact of ice-shelf loss on geochemical profiles and microbial community composition in marine sediments of the Larsen A embayment, Antarctic Peninsula", "uid": "601073", "west": 299.4}, {"awards": "1246378 Shevenell, Amelia", "bounds_geometry": ["POLYGON((-65.32 -64.15,-65.309 -64.15,-65.298 -64.15,-65.287 -64.15,-65.276 -64.15,-65.265 -64.15,-65.254 -64.15,-65.243 -64.15,-65.232 -64.15,-65.221 -64.15,-65.21 -64.15,-65.21 -64.186,-65.21 -64.222,-65.21 -64.258,-65.21 -64.294,-65.21 -64.33,-65.21 -64.366,-65.21 -64.402,-65.21 -64.438,-65.21 -64.474,-65.21 -64.51,-65.221 -64.51,-65.232 -64.51,-65.243 -64.51,-65.254 -64.51,-65.265 -64.51,-65.276 -64.51,-65.287 -64.51,-65.298 -64.51,-65.309 -64.51,-65.32 -64.51,-65.32 -64.474,-65.32 -64.438,-65.32 -64.402,-65.32 -64.366,-65.32 -64.33,-65.32 -64.294,-65.32 -64.258,-65.32 -64.222,-65.32 -64.186,-65.32 -64.15))"], "date_created": "Wed, 25 Oct 2017 00:00:00 GMT", "description": "These are unpublished stable isotope data from a series of sediment cores collected during LMG12-11 and LMG13-11 down the axis of Anvers Trough. These records span the LMG to recent.", "east": -65.21, "geometry": ["POINT(-65.265 -64.33)"], "keywords": "Antarctica; Antarctic Peninsula; Anvers Trough; Chemistry:sediment; Chemistry:Sediment; Foraminifera; Geochemistry; Isotope; LMG1211; LMG1311; Marine Sediments; Oceans; Paleoclimate; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Antarctic Peninsula; Anvers Trough; Southern Ocean; Antarctica", "north": -64.15, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Shevenell, Amelia", "project_titles": "Late Quaternary Evolution of the Lambert Glacier/Amery Ice Shelf System, Prydz Bay, Antarctica", "projects": [{"proj_uid": "p0000381", "repository": "USAP-DC", "title": "Late Quaternary Evolution of the Lambert Glacier/Amery Ice Shelf System, Prydz Bay, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.51, "title": "Anvers Trough Foraminifer Stable Isotope data", "uid": "601064", "west": -65.32}, {"awards": "0732946 Steffen, Konrad", "bounds_geometry": ["POLYGON((-66 -66,-65.4 -66,-64.8 -66,-64.2 -66,-63.6 -66,-63 -66,-62.4 -66,-61.8 -66,-61.2 -66,-60.6 -66,-60 -66,-60 -66.4,-60 -66.8,-60 -67.2,-60 -67.6,-60 -68,-60 -68.4,-60 -68.8,-60 -69.2,-60 -69.6,-60 -70,-60.6 -70,-61.2 -70,-61.8 -70,-62.4 -70,-63 -70,-63.6 -70,-64.2 -70,-64.8 -70,-65.4 -70,-66 -70,-66 -69.6,-66 -69.2,-66 -68.8,-66 -68.4,-66 -68,-66 -67.6,-66 -67.2,-66 -66.8,-66 -66.4,-66 -66))"], "date_created": "Wed, 13 Sep 2017 00:00:00 GMT", "description": "We produce a reconstruction of surface mass balance (SMB) (in mm w.e. per year) by adjusting the 1979-2014 RACMO2 SMB to the spatial pattern of ground-penetrating radar observations and to observations of SMB from sonic height rangers.", "east": -60.0, "geometry": ["POINT(-63 -68)"], "keywords": "Antarctica; Antarctic Peninsula; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Larsen C Ice Shelf; Radar", "locations": "Antarctic Peninsula; Larsen C Ice Shelf; Antarctica", "north": -66.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McGrath, Daniel; Steffen, Konrad; Kuipers Munneke, Peter", "project_titles": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate", "projects": [{"proj_uid": "p0000087", "repository": "USAP-DC", "title": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Mean surface mass balance over Larsen C ice shelf, Antarctica (1979-2014), assimilated to in situ GPR and snow height data", "uid": "601056", "west": -66.0}, {"awards": "1245580 Castro, M. Clara", "bounds_geometry": ["POINT(162.3667 -77.7166)", "POINT(163.1833 -77.6767)"], "date_created": "Mon, 30 Jan 2017 00:00:00 GMT", "description": null, "east": 163.1833, "geometry": ["POINT(162.3667 -77.7166)", "POINT(163.1833 -77.6767)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Critical Zone; Geochemistry; Noble Gas; Paleoclimate; Ross Ice Shelf; Ross Sea; Taylor Valley", "locations": "Ross Ice Shelf; Ross Sea; Taylor Valley; Antarctica", "north": -77.6767, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Castro, M. Clara", "project_titles": "Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases", "projects": [{"proj_uid": "p0000388", "repository": "USAP-DC", "title": "Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7166, "title": "Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases", "uid": "600389", "west": 162.3667}, {"awards": "1443444 Yuan, Xiaojun", "bounds_geometry": ["POLYGON((65.4503 -63.5143,67.2063 -63.5143,68.9623 -63.5143,70.7183 -63.5143,72.4743 -63.5143,74.2303 -63.5143,75.9863 -63.5143,77.7423 -63.5143,79.4983 -63.5143,81.2543 -63.5143,83.0103 -63.5143,83.0103 -64.09423,83.0103 -64.67416,83.0103 -65.25409,83.0103 -65.83402,83.0103 -66.41395,83.0103 -66.99388,83.0103 -67.57381,83.0103 -68.15374,83.0103 -68.73367,83.0103 -69.3136,81.2543 -69.3136,79.4983 -69.3136,77.7423 -69.3136,75.9863 -69.3136,74.2303 -69.3136,72.4743 -69.3136,70.7183 -69.3136,68.9623 -69.3136,67.2063 -69.3136,65.4503 -69.3136,65.4503 -68.73367,65.4503 -68.15374,65.4503 -67.57381,65.4503 -66.99388,65.4503 -66.41395,65.4503 -65.83402,65.4503 -65.25409,65.4503 -64.67416,65.4503 -64.09423,65.4503 -63.5143))"], "date_created": "Mon, 02 May 2016 00:00:00 GMT", "description": "This dataset contains inventories and location maps for CTD data acquired by the icebreaker R/V Xue Long in the Prydz Bay- Amery Ice Shelf region. A total of 68 stations were acquired in February 2015 and 24 stations in March 2017, as part of a joint US/China project to study Antarctic Bottom Water (AABW) formation.", "east": 83.0103, "geometry": ["POINT(74.2303 -66.41395)"], "keywords": "CTD Data; Oceans; Physical Oceanography; Prydz Bay; Sample/collection Description; Sample/Collection Description; Southern Ocean; Xue Long", "locations": "Prydz Bay; Southern Ocean", "north": -63.5143, "nsf_funding_programs": null, "persons": "Yuan, Xiaojun", "project_titles": "Collaborative Research: Contribution of Prydz Bay Shelf Water to Antarctic Bottom Water Formation", "projects": [{"proj_uid": "p0000295", "repository": "USAP-DC", "title": "Collaborative Research: Contribution of Prydz Bay Shelf Water to Antarctic Bottom Water Formation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.3136, "title": "CTD Data Acquired by R/V Xue Long in the Prydz Bay- Amery Ice Shelf Region, 2015-2017", "uid": "600174", "west": 65.4503}, {"awards": "0839107 Powell, Ross", "bounds_geometry": ["POLYGON((-163.7 -84,-163.68 -84,-163.66 -84,-163.64 -84,-163.62 -84,-163.6 -84,-163.58 -84,-163.56 -84,-163.54 -84,-163.52 -84,-163.5 -84,-163.5 -84.05,-163.5 -84.1,-163.5 -84.15,-163.5 -84.2,-163.5 -84.25,-163.5 -84.3,-163.5 -84.35,-163.5 -84.4,-163.5 -84.45,-163.5 -84.5,-163.52 -84.5,-163.54 -84.5,-163.56 -84.5,-163.58 -84.5,-163.6 -84.5,-163.62 -84.5,-163.64 -84.5,-163.66 -84.5,-163.68 -84.5,-163.7 -84.5,-163.7 -84.45,-163.7 -84.4,-163.7 -84.35,-163.7 -84.3,-163.7 -84.25,-163.7 -84.2,-163.7 -84.15,-163.7 -84.1,-163.7 -84.05,-163.7 -84))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "The RAGES project (Robotic Access to Grounding zones for Exploration and Science) is one of three research components of the WISSARD (Whillans Ice Stream Subglacial Access Research Drilling) integrative initiative that is being funded by the Antarctic Integrated System Science Program of NSF\u0027s Office of Polar Programs, Antarctic Division. The overarching scientific objective of WISSARD is to assess the role of water beneath a West Antarctic ice stream in interlinked glaciological, geological, microbiological, geochemical, and oceanographic systems. The RAGES component of WISSARD concentrates on the stability of ice stream grounding zones (GZ), the area where the ice, ocean waters and glacial and sea floor sediment interact. Based on our present limited data and modeling efforts, GZs can be perturbed by (i) internal ice stream dynamics, (ii) filling/draining cycles of subglacial lakes, (iii) increased melting by warming ocean waters, and/or (iv) rates of subglacial sediment (till) supply to the GZ. GZs are seen as high priority targets to investigate due to their unknown contributions to ice sheet stability under future global warming scenarios. The three main science goals for RAGES are to assess: (a) West Antarctic Ice Sheet (WAIS) stability relative to the magnitudes of the four main variables listed above; (b) the degree to which grounding-zone sedimentary systems house important records of past WAIS dynamics; and (c) the importance of microbial activity and subglacial geochemical weathering in supplying nutrients to the WAIS grounding zone, the Ross Ice Shelf (RIS) cavity, and the highly productive Southern Ocean that may ultimately influence global biogeochemical cycles. The RAGES field sampling plan integrates surface geophysical surveys with borehole and subglacial sampling and measurements. The boreholes provide: (1) samples of subglacial water, sediments, and basal ice for biological, geochemical, glaciological, sedimentological, and micropaleontological analyses; (2) measures of subglacial and sub-ice-shelf cavity physical and chemical conditions and their spatial variability; and (3) data on sediment types, state and change of the subglacial water discharge, oceanography, and basal ice at the grounding line and within the nearby sub-ice-shelf cavity. Unique tools to be deployed include a multisensor Sub-Ice ROVer (Remotely Operated Vehicle) and long-term, sub-ice oceanographic moorings.\nThe latest report of the Intergovernmental Panel on Climate Change recognized that the greatest uncertainties in assessing future global sea-level change stem from a poor understanding of ice sheet dynamics and ice sheet vulnerability to oceanic and atmospheric warming. Disintegration of the WAIS (West Antarctic Ice Sheet) alone would contribute 3-5 m to global sea-level rise, making WAIS a focus of scientific concern due to its potential susceptibility to internal or ocean-driven instability. The overall WISSARD project will test the overarching hypothesis that active water drainage connects various subglacial environments and exerts major control on ice sheet flow, geochemistry, metabolic and phylogenetic diversity, and biogeochemical transformations.\nSocietal Relevance: Global warming, melting of ice sheets and consequential sea-level rise are of high societal relevance. Science Resource Development: After a 9-year hiatus WISSARD will provide the US-science community with a renewed capability to access and study sub-ice sheet environments. Developing this technological infrastructure will benefit the broader science community and assets will be accessible for future use through the NSF-OPP drilling contractor. The RAGES project represents a significant advance in polar technology by incorporating the use of complex new instrumentation like the Sub-Ice ROVer and subglacial ocean/lake mooring systems. Furthermore, these projects will pioneer an approach implementing recommendations from the National Research Council committee on Principles of Environmental Stewardship for the Exploration and Study of Subglacial Environments (2007). Education and Outreach (E/O): These activities are grouped into four categories: i) increasing student participation in polar research by fully integrating them in our research programs; ii) introducing new investigators to the polar sciences by incorporating promising young investigators in our programs, iii) promotion of K-12 teaching and learning programs by incorporating various teachers and NSTA programs, and iv) reaching a larger public audience through such venues as popular science magazines, museum based activities and videography and documentary films. In summary, WISSARD will promote scientific exploration of Antarctica by conveying to the public the excitement of accessing and studying what may be some of the last unexplored aquatic environments on Earth, and which represent a potential analogue for extraterrestrial life habitats on Europa and Mars.", "east": -163.5, "geometry": ["POINT(-163.6 -84.25)"], "keywords": "Antarctica; Glaciology; Oceans; Southern Ocean; WISSARD", "locations": "Southern Ocean; Antarctica", "north": -84.0, "nsf_funding_programs": null, "persons": "Powell, Ross", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.5, "title": "Integrative Study of Marine Ice Sheet Stability and Subglacial Life Habitats - Robotic Access to Grounding-zones for Exploration and Science (RAGES)", "uid": "600155", "west": -163.7}, {"awards": "1042883 Mayewski, Paul", "bounds_geometry": ["POINT(-161.53 -79.39)"], "date_created": "Tue, 29 Sep 2015 00:00:00 GMT", "description": "This data set includes three Roosevelt Island Climate Evolution (RICE) ice core samples drilled on Roosevelt Island, Ross Ice Shelf, Antarctica. The RICE elements analyzed were: Sr, Cd, Cs, Ba, La, Ce, Pr, Pb, Bi, U, As, Li, I, Al, S, Ca, Ti, V, Cr, Mn, Fe, Co, Na, Mg, Cu, Zn, and K verses depth.", "east": -161.53, "geometry": ["POINT(-161.53 -79.39)"], "keywords": "Antarctica; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; ICP-MS; Roosevelt Island; Ross Ice Shelf", "locations": "Ross Ice Shelf; Roosevelt Island; Antarctica", "north": -79.39, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mayewski, Paul A.; Kurbatov, Andrei V.", "project_titles": "Roosevelt Island Climate Evolution Project (RICE): US Deep Ice Core Glaciochemistry Contribution (2011- 2014)", "projects": [{"proj_uid": "p0000193", "repository": "USAP-DC", "title": "Roosevelt Island Climate Evolution Project (RICE): US Deep Ice Core Glaciochemistry Contribution (2011- 2014)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.39, "title": "Roosevelt Island Climate Evolution Ice Core ICP-MS data", "uid": "609621", "west": -161.53}, {"awards": "0732730 Truffer, Martin", "bounds_geometry": ["POINT(-100.5 -75.1)"], "date_created": "Fri, 31 Jul 2015 00:00:00 GMT", "description": "This data set is a time series of borehole temperatures at different depths from three thermistor strings deployed in three boreholes drilled through the Pine Island Glacier ice shelf, Antarctica.", "east": -100.5, "geometry": ["POINT(-100.5 -75.1)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Pine Island Glacier; Temperature", "locations": "Pine Island Glacier; Antarctica", "north": -75.1, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Truffer, Martin; Stanton, Timothy", "project_titles": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica", "projects": [{"proj_uid": "p0000043", "repository": "USAP-DC", "title": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.1, "title": "Borehole Temperatures at Pine Island Glacier, Antarctica", "uid": "609627", "west": -100.5}, {"awards": "1043154 Tyler, Scott; 1043395 Holland, David; 1043217 Zagorodnov, Victor", "bounds_geometry": ["POINT(167.5333 -77.76667)"], "date_created": "Tue, 05 May 2015 00:00:00 GMT", "description": "Fiber-optic equipped moorings for Raman backscatter Distributed Temperature Sensing (DTS) were installed at Windless Bight, Antarctica in November 2011. Continuous-in-space measurements of temperature were recorded every meter along the mooring.", "east": 167.5333, "geometry": ["POINT(167.5333 -77.76667)"], "keywords": "Antarctica; Ice Shelf; Mcmurdo Sound; Mooring; Oceans; Physical Oceanography; Ross Ice Shelf; Southern Ocean", "locations": "Ross Ice Shelf; Mcmurdo Sound; Southern Ocean; Antarctica", "north": -77.76667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Holland, David; Tyler, Scott W.; Zagorodnov, Victor", "project_titles": "Collaborative Research: Application of Distributed Temperature Sensors (DTS) for Antarctic Ice Shelves and Cavities", "projects": [{"proj_uid": "p0000183", "repository": "USAP-DC", "title": "Collaborative Research: Application of Distributed Temperature Sensors (DTS) for Antarctic Ice Shelves and Cavities"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.76667, "title": "Fiber-Optic Distributed Temperature Sensing at Windless Bight", "uid": "609604", "west": 167.5333}, {"awards": "0944248 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((-63 -63,-62.2 -63,-61.4 -63,-60.6 -63,-59.8 -63,-59 -63,-58.2 -63,-57.4 -63,-56.6 -63,-55.8 -63,-55 -63,-55 -63.4,-55 -63.8,-55 -64.2,-55 -64.6,-55 -65,-55 -65.4,-55 -65.8,-55 -66.2,-55 -66.6,-55 -67,-55.8 -67,-56.6 -67,-57.4 -67,-58.2 -67,-59 -67,-59.8 -67,-60.6 -67,-61.4 -67,-62.2 -67,-63 -67,-63 -66.6,-63 -66.2,-63 -65.8,-63 -65.4,-63 -65,-63 -64.6,-63 -64.2,-63 -63.8,-63 -63.4,-63 -63))"], "date_created": "Tue, 29 Apr 2014 00:00:00 GMT", "description": "This data set addresses why surface melt water lakes on ice shelves and ice sheets are notably influential in triggering ice-shelf break-up and modulating seasonal ice flow, and are thus principle avenues by which environmental change can be transmitted to the ice sheets of Antarctica and Greenland. A comparative analysis is performed of lake geometry and derived depth (using Landsat image reflectance) in two distinct regions, one a collapsing ice shelf and the other an ablation zone of a land terminating ice sheet, to better characterize the range of surface lake variability.", "east": -55.0, "geometry": ["POINT(-59 -65)"], "keywords": "Antarctica; Antarctic Peninsula; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Larsen B Ice Shelf; Sample/collection Description; Sample/Collection Description; Supraglacial Meltwater", "locations": "Antarctic Peninsula; Larsen B Ice Shelf; Antarctica", "north": -63.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacAyeal, Douglas", "project_titles": "Model Studies of Surface Water Behavior on Ice Shelves", "projects": [{"proj_uid": "p0000052", "repository": "USAP-DC", "title": "Model Studies of Surface Water Behavior on Ice Shelves"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Standing Water Depth on Larsen B Ice Shelf", "uid": "609584", "west": -63.0}, {"awards": "0732983 Vernet, Maria", "bounds_geometry": ["POLYGON((-66 -62,-65.3 -62,-64.6 -62,-63.9 -62,-63.2 -62,-62.5 -62,-61.8 -62,-61.1 -62,-60.4 -62,-59.7 -62,-59 -62,-59 -62.8,-59 -63.6,-59 -64.4,-59 -65.2,-59 -66,-59 -66.8,-59 -67.6,-59 -68.4,-59 -69.2,-59 -70,-59.7 -70,-60.4 -70,-61.1 -70,-61.8 -70,-62.5 -70,-63.2 -70,-63.9 -70,-64.6 -70,-65.3 -70,-66 -70,-66 -69.2,-66 -68.4,-66 -67.6,-66 -66.8,-66 -66,-66 -65.2,-66 -64.4,-66 -63.6,-66 -62.8,-66 -62))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems. A profound transformation in ecosystem structure and function is occurring in coastal waters of the western Weddell Sea, with the collapse of the Larsen B ice shelf. This transformation appears to be yielding a redistribution of energy flow between chemoautotrophic and photosynthetic production, and to be causing the rapid demise of the extraordinary seep ecosystem discovered beneath the ice shelf. This event provides an ideal opportunity to examine fundamental aspects of ecosystem transition associated with climate change. We propose to test the following hypotheses to elucidate the transformations occurring in marine ecosystems as a consequence of the Larsen B collapse: (1) The biogeographic isolation and sub-ice shelf setting of the Larsen B seep has led to novel habitat characteristics, chemoautotrophically dependent taxa and functional adaptations. (2) Benthic communities beneath the former Larsen B ice shelf are fundamentally different from assemblages at similar depths in the Weddell sea-ice zone, and resemble oligotrophic deep-sea communities. Larsen B assemblages are undergoing rapid change. (3) The previously dark, oligotrophic waters of the Larsen B embayment now support a thriving phototrophic community, with production rates and phytoplankton composition similar to other productive areas of the Weddell Sea. To document rapid changes occurring in the Larsen B ecosystem, we will use a remotely operated vehicle, shipboard samplers, and moored sediment traps. We will characterize microbial, macrofaunal and megafaunal components of the seep community; evaluate patterns of surface productivity, export flux, and benthic faunal composition in areas previously covered by the ice shelf, and compare these areas to the open sea-ice zone. These changes will be placed within the geological, glaciological and climatological context that led to ice-shelf retreat, through companion research projects funded in concert with this effort. Together these projects will help predict the likely consequences of ice-shelf collapse to marine ecosystems in other regions of Antarctica vulnerable to climate change. The research features international collaborators from Argentina, Belgium, Canada, Germany, Spain and the United Kingdom. The broader impacts include participation of a science writer; broadcast of science segments by members of the Jim Lehrer News Hour (Public Broadcasting System); material for summer courses in environmental change; mentoring of graduate students and postdoctoral fellows; and showcasing scientific activities and findings to students and public through podcasts.\n", "east": -59.0, "geometry": ["POINT(-62.5 -66)"], "keywords": "Antarctica; Antarctic Peninsula; Araon1304; Biota; LARISSA; Larsen B Ice Shelf; NBP1001; NBP1203; Oceans; Physical Oceanography; Southern Ocean; Weddell Sea", "locations": "Antarctic Peninsula; Weddell Sea; Larsen B Ice Shelf; Southern Ocean; Antarctica", "north": -62.0, "nsf_funding_programs": null, "persons": "Vernet, Maria", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -70.0, "title": "Abrupt Environmental Change in the Larsen Ice Shelf System (LARISSA) - Marine Ecosystems", "uid": "600073", "west": -66.0}, {"awards": "0732804 McPhee, Miles", "bounds_geometry": ["POINT(166.25 -77.42)"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "The Office of Polar Programs, Antarctic Integrated and System Science Program has made this award to support an interdisciplinary study of the effects of the ocean on the stability of glacial ice in the most dynamic region the West Antarctic Ice Sheet, namely the Pine Island Glacier in the Amundsen Sea Embayment. The collaborative project builds on the knowledge gained by the highly successful West Antarctic Ice Sheet program and is being jointly sponsored with NASA. Recent observations indicate a significant ice loss, equivalent to 10% of the ongoing increase in sea-level rise, in this region. These changes are largest along the coast and propagate rapidly inland, indicating the critical impact of the ocean on ice sheet stability in the region. While a broad range of remote sensing and ground-based instrumentation is available to characterize changes of the ice surface and internal structure (deformation, ice motion, melt) and the shape of the underlying sediment and rock bed, instrumentation has yet to be successfully deployed for observing boundary layer processes of the ocean cavity which underlies the floating ice shelf and where rapid melting is apparently occurring. Innovative, mini ocean sensors that can be lowered through boreholes in the ice shelf (about 500 m thick) will be developed and deployed to automatically provide ocean profiling information over at least three years. Their data will be transmitted through a conducting cable frozen in the borehole to the surface where it will be further transmitted via satellite to a laboratory in the US. Geophysical and remote sensing methods (seismic, GPS, altimetry, stereo imaging, radar profiling) will be applied to map the geometry of the ice shelf, the shape of the sub ice-shelf cavity, the ice surface geometry and deformations within the glacial ice. To integrate the seismic, glaciological and oceanographic observations, a new 3-dimensional coupled ice-ocean model is being developed which will be the first of its kind. NASA is supporting satellite based research and the deployment of a robotic-camera system to explore the environment in the ocean cavity underlying the ice shelf and NSF is supporting all other aspects of this study. \n\nBroader impacts: This project is motivated by the potential societal impacts of rapid sea level rise and should result in critically needed improvements in characterizing and predicting the behavior of coupled ocean-ice systems. It is a contribution to the International Polar Year and was endorsed by the International Council for Science as a component of the \u0027Multidisciplinary Study of the Amundsen Sea Embayment\u0027 proposal #258 of the honeycomb of endorsed IPY activities. The research involves substantial international partnerships with the British Antarctic Survey and the University of Bristol in the UK. The investigators will partner with the previously funded \u0027Polar Palooza\u0027 education and outreach program in addition to undertaking a diverse set of outreach activities of their own. Eight graduate students and one undergraduate as well as one post doc will be integrated into this research project.\n", "east": 166.25, "geometry": ["POINT(166.25 -77.42)"], "keywords": "Antarctica; Atmosphere; Mcmurdo; Meteorology; Oceans; Ross Island; Southern Ocean", "locations": "Mcmurdo; Ross Island; Southern Ocean; Antarctica", "north": -77.42, "nsf_funding_programs": null, "persons": "McPhee, Miles G.", "project_titles": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica", "projects": [{"proj_uid": "p0000043", "repository": "USAP-DC", "title": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.42, "title": "Ocean-Ice Interaction in the Amundsen Sea Sector of West Antarctica", "uid": "600072", "west": 166.25}, {"awards": "0732655 Mosley-Thompson, Ellen", "bounds_geometry": ["POLYGON((-63 -60,-62.6 -60,-62.2 -60,-61.8 -60,-61.4 -60,-61 -60,-60.6 -60,-60.2 -60,-59.8 -60,-59.4 -60,-59 -60,-59 -60.5,-59 -61,-59 -61.5,-59 -62,-59 -62.5,-59 -63,-59 -63.5,-59 -64,-59 -64.5,-59 -65,-59.4 -65,-59.8 -65,-60.2 -65,-60.6 -65,-61 -65,-61.4 -65,-61.8 -65,-62.2 -65,-62.6 -65,-63 -65,-63 -64.5,-63 -64,-63 -63.5,-63 -63,-63 -62.5,-63 -62,-63 -61.5,-63 -61,-63 -60.5,-63 -60))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Like no other region on Earth, the northern Antarctic Peninsula represents a spectacular natural laboratory of climate change and provides the opportunity to study the record of past climate and ecological shifts alongside the present-day changes in one of the most rapidly warming regions on Earth. This award supported the cryospheric and oceanographic components of an integrated multi-disciplinary program to address these rapid and fundamental changes now taking place in Antarctic Peninsula (AP). By making use of a marine research platform (the RV NB Palmer and on-board helicopters) and additional logistical support from the Argentine Antarctic program, the project brought together glaciologists, oceanographers, marine geologists and biologists who have worked collaboratively to address fundamental interdisciplinary questions regarding climate change.", "east": -59.0, "geometry": ["POINT(-61 -62.5)"], "keywords": "Antarctica; Antarctic Peninsula; Bruce Plateau; Glaciology; Ice Core Records; Isotope; LARISSA; Paleoclimate; Sample/collection Description; Sample/Collection Description; Snow Accumulation", "locations": "Antarctic Peninsula; Bruce Plateau; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Thompson, Lonnie G.; Mosley-Thompson, Ellen", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -65.0, "title": "Abrupt Environmental Change in the Larsen Ice Shelf System (LARISSA) - Cryosphere and Oceans", "uid": "600167", "west": -63.0}, {"awards": "0125754 Hulbe, Christina; 0440670 Hulbe, Christina", "bounds_geometry": ["POLYGON((-86.557 -74.355,-80.5124 -74.355,-74.4678 -74.355,-68.4232 -74.355,-62.3786 -74.355,-56.334 -74.355,-50.2894 -74.355,-44.2448 -74.355,-38.2002 -74.355,-32.1556 -74.355,-26.111 -74.355,-26.111 -75.3874,-26.111 -76.4198,-26.111 -77.4522,-26.111 -78.4846,-26.111 -79.517,-26.111 -80.5494,-26.111 -81.5818,-26.111 -82.6142,-26.111 -83.6466,-26.111 -84.679,-32.1556 -84.679,-38.2002 -84.679,-44.2448 -84.679,-50.2894 -84.679,-56.334 -84.679,-62.3786 -84.679,-68.4232 -84.679,-74.4678 -84.679,-80.5124 -84.679,-86.557 -84.679,-86.557 -83.6466,-86.557 -82.6142,-86.557 -81.5818,-86.557 -80.5494,-86.557 -79.517,-86.557 -78.4846,-86.557 -77.4522,-86.557 -76.4198,-86.557 -75.3874,-86.557 -74.355))"], "date_created": "Fri, 15 Jul 2011 00:00:00 GMT", "description": "This data set provides a structural feature map of the Ronne Ice Shelf in Antarctica (also known as the Filchner-Ronne Ice Shelf). The map was developed as part of a project to study fracture propagation in the Ronne Ice Shelf, with special focus on the Evans Ice Stream. Features were digitized from the MODIS Mosaic of Antartica (MOA), a composite of individual Moderate Resolution Imaging Spectradiometer (MODIS) images taken between 20 November 2003 and 29 February 2004, with an effective resolution of 125 m. The data set includes estimates of the shelf boundary, including ice stream grounding zones, outlets of glaciers feeding the shelf, extents of islands and ice rises, and the location of the shelf front, and features observed within the shelf, including suture zones between ice streams, streaklines, fractures (crevasses and rifts), and fold-like features. Individual features can be extracted as a group of points and grouping is used to facilitate identification and plotting. \n\nData files are available via FTP in ASCII text (.txt) format. One image file, in Portable Document Format (.pdf), shows the data included in the dataset, plotted using MATLAB. The data set also provides a MATLAB script which can be used to plot the data.", "east": -26.111, "geometry": ["POINT(-56.334 -79.517)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; MOA; MODIS; Ronne Ice Shelf", "locations": "Ronne Ice Shelf; Antarctica", "north": -74.355, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina; Ledoux, Christine", "project_titles": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams", "projects": [{"proj_uid": "p0000096", "repository": "USAP-DC", "title": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.679, "title": "MOA-derived Structural Feature Map of the Ronne Ice Shelf", "uid": "609497", "west": -86.557}, {"awards": "0540915 Scambos, Ted", "bounds_geometry": ["POLYGON((-60 -47,-55.5 -47,-51 -47,-46.5 -47,-42 -47,-37.5 -47,-33 -47,-28.5 -47,-24 -47,-19.5 -47,-15 -47,-15 -50.3,-15 -53.6,-15 -56.9,-15 -60.2,-15 -63.5,-15 -66.8,-15 -70.1,-15 -73.4,-15 -76.7,-15 -80,-19.5 -80,-24 -80,-28.5 -80,-33 -80,-37.5 -80,-42 -80,-46.5 -80,-51 -80,-55.5 -80,-60 -80,-60 -76.7,-60 -73.4,-60 -70.1,-60 -66.8,-60 -63.5,-60 -60.2,-60 -56.9,-60 -53.6,-60 -50.3,-60 -47))"], "date_created": "Mon, 31 Jan 2011 00:00:00 GMT", "description": "This data set includes a variety of station data from two Antarctic icebergs. In 2006, researchers installed specialized weather stations called Automated Meteorological Ice Geophysical Observing Stations (AMIGOS) on two icebergs, A22A and UK211 (nicknamed Amigosberg), near Marambio Station in Antarctica.The AMIGOS stations were outfitted with Global Positioning System (GPS) sensors, cameras, and an electronic thermometer. They collected data from their installation in March 2006 until the icebergs crumbled into the ocean, in 2006 (Amigosberg) and 2007 (A22A). Available data include GPS, temperature and ablation measurements, and photographs of the station base and of flag lines extending out to the edges of the icebergs. Snow pit data from iceberg A22A is also included.\n\nThis data set was collected as part of a National Science Foundation Office of Polar Programs Special Grant for Exploratory Research, to explore the possibility of using drfting icebergs to investigate ice shelf evolution caused by climate change. The expedition, nicknamed IceTrek, was conducted jointly with Argentine scientists. The data are available via FTP in ASCII text (.txt) and Joint Photographic Experts Group (.jpg) formats.", "east": -15.0, "geometry": ["POINT(-37.5 -63.5)"], "keywords": "Ablation; Atmosphere; Glaciology; GPS; Meteorology; Oceans; Photo/video; Photo/Video; Sea Ice; Southern Ocean; Temperature", "locations": "Southern Ocean", "north": -47.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Bohlander, Jennifer; Bauer, Rob; Yermolin, Yevgeny; Thom, Jonathan", "project_titles": "Investigating Iceberg Evolution During Drift and Break-Up: A Proxy for Climate-Related Changes in Antarctic Ice Shelves", "projects": [{"proj_uid": "p0000003", "repository": "USAP-DC", "title": "Investigating Iceberg Evolution During Drift and Break-Up: A Proxy for Climate-Related Changes in Antarctic Ice Shelves"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Climate, Drift, and Image Data from Antarctic Icebergs A22A and UK211, 2006-2007", "uid": "609466", "west": -60.0}, {"awards": "0338163 Leventer, Amy", "bounds_geometry": ["POLYGON((-70.90391 -52.35262,-68.130917 -52.35262,-65.357924 -52.35262,-62.584931 -52.35262,-59.811938 -52.35262,-57.038945 -52.35262,-54.265952 -52.35262,-51.492959 -52.35262,-48.719966 -52.35262,-45.946973 -52.35262,-43.17398 -52.35262,-43.17398 -53.75776,-43.17398 -55.1629,-43.17398 -56.56804,-43.17398 -57.97318,-43.17398 -59.37832,-43.17398 -60.78346,-43.17398 -62.1886,-43.17398 -63.59374,-43.17398 -64.99888,-43.17398 -66.40402,-45.946973 -66.40402,-48.719966 -66.40402,-51.492959 -66.40402,-54.265952 -66.40402,-57.038945 -66.40402,-59.811938 -66.40402,-62.584931 -66.40402,-65.357924 -66.40402,-68.130917 -66.40402,-70.90391 -66.40402,-70.90391 -64.99888,-70.90391 -63.59374,-70.90391 -62.1886,-70.90391 -60.78346,-70.90391 -59.37832,-70.90391 -57.97318,-70.90391 -56.56804,-70.90391 -55.1629,-70.90391 -53.75776,-70.90391 -52.35262))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "The NSF-supported research icebreaker Nathaniel B. Palmer operates year-round in support of the U.S. Antarctic Program, carrying out global change studies in biological, chemical, physical, and oceanographic disciplines. \n This data set consists of underway data from leg NBP0603 on the R/V Nathaniel B. Palmer. This leg started at Punta Arenas, Chile and ended at Punta Arenas, Chile.", "east": -43.17398, "geometry": ["POINT(-57.038945 -59.37832)"], "keywords": "ADCP Acoustic Doppler Current Profiler; Antarctic Peninsula; Biota; Diatom; Electromagnetic Data; Flask Glacier; Foehn Winds; Larsen Ice Shelf; Marine Sediments; NBP0603; Oceans; Physical Ice Properties; R/v Nathaniel B. Palmer; Scar Inlet; Southern Ocean", "locations": "Larsen Ice Shelf; Antarctic Peninsula; Scar Inlet; Flask Glacier; Southern Ocean", "north": -52.35262, "nsf_funding_programs": null, "persons": "Domack, Eugene Walter", "project_titles": "Collaborative Research: Paleohistory of the Larsen Ice Shelf System: Phase II", "projects": [{"proj_uid": "p0000215", "repository": "USAP-DC", "title": "Collaborative Research: Paleohistory of the Larsen Ice Shelf System: Phase II"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.40402, "title": "R/V Nathaniel B. Palmer NBP0603 - Paleohistory of the Larsen Ice Shelf System", "uid": "600027", "west": -70.90391}, {"awards": "0840375 Costa, Daniel", "bounds_geometry": ["POLYGON((-64 -60,-63 -60,-62 -60,-61 -60,-60 -60,-59 -60,-58 -60,-57 -60,-56 -60,-55 -60,-54 -60,-54 -60.4,-54 -60.8,-54 -61.2,-54 -61.6,-54 -62,-54 -62.4,-54 -62.8,-54 -63.2,-54 -63.6,-54 -64,-55 -64,-56 -64,-57 -64,-58 -64,-59 -64,-60 -64,-61 -64,-62 -64,-63 -64,-64 -64,-64 -63.6,-64 -63.2,-64 -62.8,-64 -62.4,-64 -62,-64 -61.6,-64 -61.2,-64 -60.8,-64 -60.4,-64 -60))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Long-lived animals such as elephant seals may endure variation in food resources over large spatial and temporal scales. Understanding how they respond to these fluctuations requires knowledge of how their foraging behavior and habitat utilization varies over time. Advances in satellite-linked data logging have made it possible to correlate the foraging behavior of marine mammals with their physical and chemical environment and provide insight into the mechanisms controlling at-sea movements, foraging behavior and, ultimately, reproductive success of these pelagic predators. In addition, these technological advances enable marine mammals to be used as highly cost-effective platforms from which detailed oceanographic data can be collected on a scale not possible with conventional methods. The project will extend the four-year-time-series collected on the foraging behavior and habitat utilization of southern elephant seal (Mirounga leonina) foraging in the Western Antarctic Peninsula. It also will extend the oceanographic time-series of CTD profiles collected by the elephant seals foraging from the Livingston Island rookery. Seals have been collecting CTD profiles in the vicinity of the Wilkins Ice Shelf (WIS) since 2005. We thus have a 4 year data set that preceding and during the breakup of the WIS that occurred during March 2008. Deployment of additional tags on seals will provide a unique opportunity to collect oceanographic data after the ice shelf has collapsed.", "east": -54.0, "geometry": ["POINT(-59 -62)"], "keywords": "Biota; CTD Data; Oceans; Physical Oceanography; Seals; Southern Ocean", "locations": "Southern Ocean", "north": -60.0, "nsf_funding_programs": null, "persons": "Goebel, Michael; Costa, Daniel", "project_titles": "SGER: Foraging Patterns of Elephant Seals in the Vicinity of the WIlkins Ice Shelf", "projects": [{"proj_uid": "p0000158", "repository": "USAP-DC", "title": "SGER: Foraging Patterns of Elephant Seals in the Vicinity of the WIlkins Ice Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "SGER: Foraging Patterns of Elephant Seals in the Vicinity of the WIlkins Ice Shelf", "uid": "600108", "west": -64.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(-178 -78)"], "date_created": "Mon, 15 Dec 2008 00:00:00 GMT", "description": "Since November of 2006, 12 thermistors were planted in the upper 16 meters of the firn on the Ross Ice Shelf near its calving front. Temperature data are collected every 20 minutes and are transmitted via ARGOS satellite relay. Data are intended to provide a view of how firn temperatures change as the ice shelf evolves. Data are available in comma-delimited ASCII format. Data are available via FTP.", "east": -178.0, "geometry": ["POINT(-178 -78)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ross Ice Shelf; Snow/ice; Snow/Ice; Temperature", "locations": "Ross Ice Shelf; Antarctica", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Muto, Atsu; Sergienko, Olga; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Ross Ice Shelf Firn Temperature, Antarctica", "uid": "609354", "west": -178.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(168 -78)"], "date_created": "Fri, 28 Nov 2008 00:00:00 GMT", "description": "Since November of 2005, 12 thermistors were planted in the upper 2.5 meters of the firn on iceberg C16, Antarctica. Temperature data are collected every 20 minutes and are transmitted via ARGOS satellite relay. Data are intended to provide a view of how firn temperatures change as an iceberg moves north into warmer climate.", "east": 168.0, "geometry": ["POINT(168 -78)"], "keywords": "Glaciology; Iceberg; Oceans; Ross Ice Shelf; Sea Ice; Snow/ice; Snow/Ice; Southern Ocean; Temperature", "locations": "Ross Ice Shelf; Southern Ocean", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Thom, Jonathan; Sergienko, Olga; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Iceberg Firn Temperatures, Antarctica", "uid": "609352", "west": 168.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(168 -77)"], "date_created": "Tue, 25 Nov 2008 00:00:00 GMT", "description": "Time series of tiltmeter observations (tilt about two horizontal axes in microradians) for a 34 day period on iceberg C16 while it was aground near Ross Island in late 2001 to early 2002. Data shows tilts associated with differential basal melting of the iceberg, tidal motion and short-term tilts induced by iceberg tremor phenomena triggered by collisions between B15A and C16. The sample rate was 5 seconds. Data are available in comma-delimited ASCII format. Data are available via FTP.", "east": 168.0, "geometry": ["POINT(168 -77)"], "keywords": "Glaciology; Iceberg; Oceans; Ross Ice Shelf; Sea Ice; Southern Ocean; Tiltmeter", "locations": "Ross Ice Shelf; Southern Ocean", "north": -77.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kim, Young-Jin; Bliss, Andrew; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Iceberg Tiltmeter Measurements, Antarctica", "uid": "609353", "west": 168.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(-178 -78)"], "date_created": "Tue, 11 Nov 2008 00:00:00 GMT", "description": "From November 2004 to March 2005, on the Ross Ice Shelf, Antarctica, an automated \"web cam\" was operated on the southward facing lip of a large ice-shelf rift to produce a photographic record of processes active in ice-shelf rift systems. Four times each day, the camera took a photograph in four repeating directions.", "east": -178.0, "geometry": ["POINT(-178 -78)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Photo/video; Photo/Video; Ross Ice Shelf", "locations": "Ross Ice Shelf; Antarctica", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brunt, Kelly; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Ice Shelf Rift Time-Lapse Photography, Antarctica", "uid": "609351", "west": -178.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(-178 -78)"], "date_created": "Wed, 01 Oct 2008 00:00:00 GMT", "description": "In October 2005, three geodetic GPS receivers were deployed on the Ross Ice Shelf near the ice front to observe short-term fluctuations in ice-shelf velocity associated with tidal forcing and other phenomena. Two stations were placed on either side of a large rift that is expected to eventually create the next iceberg to calve from the Ross Ice Shelf (called \"Nascent Iceberg\"). One station was established at a location near station R13, occupied in 1979 during the RIGGS project (Thomas et al., 1984), to determine if the near-ice-front part of the Ross Ice Shelf has significantly changed its long-term flow since the late 1970s.", "east": -178.0, "geometry": ["POINT(-178 -78)"], "keywords": "Antarctica; Geodesy; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Ross Ice Shelf; Southern Ocean", "locations": "Ross Ice Shelf; Southern Ocean; Antarctica", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brunt, Kelly; King, Matthew; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Continuous GPS (static) Data from the Ross Ice Shelf, Antarctica", "uid": "609347", "west": -178.0}, {"awards": "0338359 Saltzman, Eric", "bounds_geometry": ["POINT(-148.81 -81.65)"], "date_created": "Wed, 16 Nov 2005 00:00:00 GMT", "description": "This data set is part of the WAISCORES (West Antarctic Ice Sheet cores) project, research funded by the National Science Foundation (NSF) and designed to improve understanding of how the West Antarctic ice sheet influences climate and sea level change. WAISCORES investigators acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica. These data provide researchers with a record of natural climatic variability and anthropogenic influence on biogeochemical cycles. Because ice cores contain an archive of preindustrial air, a baseline can be established, and the extent of human impact on the climate can be ascertained. \n\nThis data set includes mixing ratios of carbonyl sulfide (COS), methyl chloride (CH3Cl), and methyl bromide (CH3Br). Data samples were retrieved from the Siple C ice core, which was drilled at 81.65\u00b0 S, 148.81\u00b0 W in December 1995. The core site sits 620 m above sea level near the edge of the Ross Ice Shelf where there is a mean annual temperature of -25.4 \u00b0C.\n\nData are available via FTP.", "east": -148.81, "geometry": ["POINT(-148.81 -81.65)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Siple Dome; Antarctica", "north": -81.65, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric; Aydin, Murat", "project_titles": "Methyl chloride and methyl bromide in Antarctic ice cores", "projects": [{"proj_uid": "p0000032", "repository": "USAP-DC", "title": "Methyl chloride and methyl bromide in Antarctic ice cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.65, "title": "Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)", "uid": "609279", "west": -148.81}, {"awards": "9319379 Blankenship, Donald; 9120464 Blankenship, Donald; 9319369 Blankenship, Donald; 9911617 Blankenship, Donald", "bounds_geometry": ["POLYGON((-90 -68.73,-72 -68.73,-54 -68.73,-36 -68.73,-18 -68.73,0 -68.73,18 -68.73,36 -68.73,54 -68.73,72 -68.73,90 -68.73,90 -69.357,90 -69.984,90 -70.611,90 -71.238,90 -71.865,90 -72.492,90 -73.119,90 -73.746,90 -74.373,90 -75,72 -75,54 -75,36 -75,18 -75,0 -75,-18 -75,-36 -75,-54 -75,-72 -75,-90 -75,-90 -74.373,-90 -73.746,-90 -73.119,-90 -72.492,-90 -71.865,-90 -71.238,-90 -70.611,-90 -69.984,-90 -69.357,-90 -68.73))"], "date_created": "Tue, 13 Jul 2004 00:00:00 GMT", "description": "The data that the Support Office for Aerogeophysical Research (SOAR) provides include various aerogeophysical measurements taken in the West Antarctic Ice Shelf (WAIS) from 1994 to 2001. \n\nThe instruments used in experiments include ice-penetrating radar, laser altimetry and magnetics, and an integrated aerogeophysical platform that includes airborne gravity with carrier-phase GPS to support kinematic differential positioning.\n\nSOAR is a part of the University of Texas Institute for Geophysics (UTIG) and provides several types of data associated with various campaigns over the years. This material is based on work supported by the National Science Foundation under Grants: OPP-9120464, 9319369, 9319379, and 9911617.", "east": 90.0, "geometry": ["POINT(-180 -71.865)"], "keywords": "Airborne Radar; Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Navigation; Potential Field; SOAR; Solid Earth", "locations": "Antarctica", "north": -68.73, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Morse, David L.; Holt, John W.; Dalziel, Ian W.", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.0, "title": "Antarctic Aerogeophysics Data", "uid": "609240", "west": -90.0}, {"awards": "0338151 Raymond, Charles", "bounds_geometry": ["POLYGON((-157 -71,-154.9 -71,-152.8 -71,-150.7 -71,-148.6 -71,-146.5 -71,-144.4 -71,-142.3 -71,-140.2 -71,-138.1 -71,-136 -71,-136 -71.9,-136 -72.8,-136 -73.7,-136 -74.6,-136 -75.5,-136 -76.4,-136 -77.3,-136 -78.2,-136 -79.1,-136 -80,-138.1 -80,-140.2 -80,-142.3 -80,-144.4 -80,-146.5 -80,-148.6 -80,-150.7 -80,-152.8 -80,-154.9 -80,-157 -80,-157 -79.1,-157 -78.2,-157 -77.3,-157 -76.4,-157 -75.5,-157 -74.6,-157 -73.7,-157 -72.8,-157 -71.9,-157 -71))"], "date_created": "Wed, 10 Dec 2003 00:00:00 GMT", "description": "This data set provides surface elevation and ice thickness data for a portion of the Marie Byrd Land sector of West Antarctica, including the Ford Ranges, the Sulzberger Ice Shelf, much of the Edward VII Peninsula, and the Shirase Coast region of the eastern Ross Ice Shelf. The investigators used radar sounding and laser altimetry from a Twin Otter aircraft flying at varying altitudes, at least 300 m above the surface, at an air speed of about 130 knots. Surveys were accomplished with 64 flights in December 1998 and January 1999. This research was funded by the National Science Foundation (NSF) contract NSF OPP 9615281.", "east": -136.0, "geometry": ["POINT(-146.5 -75.5)"], "keywords": "Airborne Radar; Airplane; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marie Byrd Land", "locations": "Marie Byrd Land; Antarctica", "north": -71.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Luyendyk, Bruce P.; Wilson, Douglas S.", "project_titles": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data", "projects": [{"proj_uid": "p0000017", "repository": "USAP-DC", "title": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Surface Elevation and Ice Thickness, Western Marie Byrd Land, Antarctica", "uid": "609119", "west": -157.0}, {"awards": "9909469 Scambos, Ted", "bounds_geometry": ["POLYGON((-158 -82.2,-155.63 -82.2,-153.26 -82.2,-150.89 -82.2,-148.52 -82.2,-146.15 -82.2,-143.78 -82.2,-141.41 -82.2,-139.04 -82.2,-136.67 -82.2,-134.3 -82.2,-134.3 -82.33,-134.3 -82.46,-134.3 -82.59,-134.3 -82.72,-134.3 -82.85,-134.3 -82.98,-134.3 -83.11,-134.3 -83.24,-134.3 -83.37,-134.3 -83.5,-136.67 -83.5,-139.04 -83.5,-141.41 -83.5,-143.78 -83.5,-146.15 -83.5,-148.52 -83.5,-150.89 -83.5,-153.26 -83.5,-155.63 -83.5,-158 -83.5,-158 -83.37,-158 -83.24,-158 -83.11,-158 -82.98,-158 -82.85,-158 -82.72,-158 -82.59,-158 -82.46,-158 -82.33,-158 -82.2))"], "date_created": "Fri, 01 Aug 2003 00:00:00 GMT", "description": "This data set includes ice motion and topography measurements that were taken by measuring movement and altitude of poles set in the West Antarctic Ice Shelf. The data was acquired by Global Positioning System (GPS) measurements of poles. The position of the poles was measured twice; once in 2000, and again in 2002. Movement of the poles in that time show the ice motion velocity and direction.\n GPS pole positions are given in latitude and longitude, and elevations are given in meters above the WGS1984 ellipsoid. The data are presented as tables in ASCII text files. Three maps of the area are included with the data tables.\n\nThe National Science Foundation (NSF) funded this work under grant number OPP-9909469.", "east": -134.3, "geometry": ["POINT(-146.15 -82.85)"], "keywords": "Antarctica; Geodesy; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Kamb Ice Stream", "locations": "Kamb Ice Stream; Antarctica", "north": -82.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Catania, Ginny; Conway, Howard; Gades, Anthony; Raymond, Charles", "project_titles": "Collaborative Research: History and Evolution of the Siple Coast Ice Stream System as Recorded by Former Shear-Margin Scars", "projects": [{"proj_uid": "p0000165", "repository": "USAP-DC", "title": "Collaborative Research: History and Evolution of the Siple Coast Ice Stream System as Recorded by Former Shear-Margin Scars"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.5, "title": "Ice Motion and Topography Near Margin Areas of Kamb Ice Stream, Antarctica", "uid": "609141", "west": -158.0}, {"awards": "9615347 Conway, Howard", "bounds_geometry": ["POLYGON((-161.5307 -79.3539,-161.3584 -79.3539,-161.1861 -79.3539,-161.0138 -79.3539,-160.8415 -79.3539,-160.6692 -79.3539,-160.4969 -79.3539,-160.3246 -79.3539,-160.1523 -79.3539,-159.98 -79.3539,-159.8077 -79.3539,-159.8077 -79.37757,-159.8077 -79.40124,-159.8077 -79.42491,-159.8077 -79.44858,-159.8077 -79.47225,-159.8077 -79.49592,-159.8077 -79.51959,-159.8077 -79.54326,-159.8077 -79.56693,-159.8077 -79.5906,-159.98 -79.5906,-160.1523 -79.5906,-160.3246 -79.5906,-160.4969 -79.5906,-160.6692 -79.5906,-160.8415 -79.5906,-161.0138 -79.5906,-161.1861 -79.5906,-161.3584 -79.5906,-161.5307 -79.5906,-161.5307 -79.56693,-161.5307 -79.54326,-161.5307 -79.51959,-161.5307 -79.49592,-161.5307 -79.47225,-161.5307 -79.44858,-161.5307 -79.42491,-161.5307 -79.40124,-161.5307 -79.37757,-161.5307 -79.3539))"], "date_created": "Fri, 23 May 2003 00:00:00 GMT", "description": "This data set consists of bedrock and surface elevation readings taken by ground penetrating radar and Global Positioning System (GPS) on Roosevelt Island, an ice dome within the Ross Ice Shelf. Locations were validated by GPS readings of poles set in the surface snow. The data was collected between November and December, 1997.\n\nData are available via ftp, and are provided in a text file with an accompanying file that provides GPS locations. Surface and bedrock elevations are given in meters above WGS84.", "east": -159.8077, "geometry": ["POINT(-160.6692 -79.47225)"], "keywords": "Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Roosevelt Island; Solid Earth", "locations": "Roosevelt Island; Antarctica", "north": -79.3539, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C", "projects": [{"proj_uid": "p0000164", "repository": "USAP-DC", "title": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.5906, "title": "Roosevelt Island Bedrock and Surface Elevations", "uid": "609140", "west": -161.5307}, {"awards": "9615347 Conway, Howard", "bounds_geometry": ["POLYGON((-161.5667 -79.3889,-161.44836 -79.3889,-161.33002 -79.3889,-161.21168 -79.3889,-161.09334 -79.3889,-160.975 -79.3889,-160.85666 -79.3889,-160.73832 -79.3889,-160.61998 -79.3889,-160.50164 -79.3889,-160.3833 -79.3889,-160.3833 -79.41168,-160.3833 -79.43446,-160.3833 -79.45724,-160.3833 -79.48002,-160.3833 -79.5028,-160.3833 -79.52558,-160.3833 -79.54836,-160.3833 -79.57114,-160.3833 -79.59392,-160.3833 -79.6167,-160.50164 -79.6167,-160.61998 -79.6167,-160.73832 -79.6167,-160.85666 -79.6167,-160.975 -79.6167,-161.09334 -79.6167,-161.21168 -79.6167,-161.33002 -79.6167,-161.44836 -79.6167,-161.5667 -79.6167,-161.5667 -79.59392,-161.5667 -79.57114,-161.5667 -79.54836,-161.5667 -79.52558,-161.5667 -79.5028,-161.5667 -79.48002,-161.5667 -79.45724,-161.5667 -79.43446,-161.5667 -79.41168,-161.5667 -79.3889))"], "date_created": "Wed, 14 May 2003 00:00:00 GMT", "description": "This data set measures the radioactive decay of nuclear material from Northern and Southern hemisphere nuclear testing. Firn cores were taken from three locations on Roosevelt Island, an ice dome within the Ross Ice Shelf, and were measured at increasing depth for density in kilograms per cubic meter, and for beta counts per hour per kilogram.\n\nThe data were collected between November and December of 1997. Measurements were taken incrementally down to approximately 17 meters for each of the three cores. Data are available in text format via ftp.", "east": -160.3833, "geometry": ["POINT(-160.975 -79.5028)"], "keywords": "Antarctica; Beta Count; Density; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Physical Properties; Roosevelt Island", "locations": "Roosevelt Island; Antarctica", "north": -79.3889, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C", "projects": [{"proj_uid": "p0000164", "repository": "USAP-DC", "title": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.6167, "title": "Roosevelt Island Ice Core Density and Beta Count Data", "uid": "609139", "west": -161.5667}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": null, "date_created": "Mon, 01 Jan 2001 00:00:00 GMT", "description": "Recent changes in the extent and stability of ice shelves in the Antarctic Peninsula prompted NSIDC to begin a monitoring program using data from the AVHRR Polar 1 km Data Set. NSIDC regularly reviews images of those ice shelves considered susceptible to rapid change due to climatic warming, and of several other major shelves that occasionally calve major icebergs.\n\nThe images in this site represent a selected subset of the available scenes, generally the clearest and most informative scenes available. The scenes are derived from either the AVHRR visible (vis) or thermal (temp) channels, enhanced by combining two channels using principal components processing. In the thermal images, bright areas are colder areas. A few additional scenes from other sensors (MODIS, Landsat) are included to provide some supplemental information on ice shelf structure and events.\n\nIf you wish to save an image, you can do so through the \u0027Save image as\u0027 option of the browser\u0027s pop-up menu. For more information contact NSIDC User Services.", "east": null, "geometry": null, "keywords": "Antarctica; AVHRR; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Sample/collection Description; Sample/Collection Description; Sea Ice", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Raup, Bruce H.; Bohlander, Jennifer", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Images of Antarctic Ice Shelves", "uid": "609102", "west": null}]

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