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Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica Entry ID: NSIDC-0292 |
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Summary
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Abstract:
This data set includes 5 km gridded data from the Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA) conducted during the 2004-2005 austral summer. Investigators derived maps of the ice sheet surface and subglacial topography, which covers the entire catchments of both the Thwaites Glacier and the Pine Islands Glacier, from airborne survey systems mounted on a Twin Otter aircraft. The surveys had sufficient density to identify critical ice dynamic transitions within the Amundsen Sea Embayment (ASE). The ASE is the only major drainage to exhibit significant elevation change over the period of available satellite observations. Modeling of the Western Antarctic Ice Sheet (WAIS) deglaciation pinpointed the Pine Island Glacier and the Thwaites Glacier, which comprise a major portion of the ASE, as the most vulnerable features of the WAIS. Present knowledge of the ice thickness and subglacial boundary conditions in the ASE are insufficient to understand its evolution or its sensitivity to climatic change, and it is not yet determined whether these changes are evidence of ongoing deglaciation or simply a fluctuation that does not threaten the equilibrium of the ice sheet. This research will support the efforts of a community of United States and international researchers to assess the present and predict the future behavior of the ice sheet in the ASE. These data are available via FTP.
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Related URL
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Link:
GET DATA
Description: FTP site for obtaining these data. Link: GET DATA Link: GET SERVICE > GET WEB MAP SERVICE (WMS) Description: Access these data as map images using the Open Geospatial Consortium (OGC) Web Map Service (WMS). Link: GET SERVICE > GET WEB FEATURE SERVICE (WFS) Description: Access these data in Geography Markup Language (GML) using the Open Geospatial Consortium (OGC) Web Feature Service (WFS). Link: GET SERVICE > ACCESS MAP VIEWER Description: View ice thickness for this data set in NSIDC's Antarctic Cryosphere Access Portal (A-CAP) online map viewer. Link: GET SERVICE > ACCESS MAP VIEWER Description: View bedrock elevation for this data set in NSIDC's Antarctic Cryosphere Access Portal (A-CAP) online map viewer. Link: VIEW PROJECT HOME PAGE Description: Airborne geophysical survey of the Amundsen Sea Embayment, Antarctica (AGASEA) Link: VIEW RELATED INFORMATION Description: Ice Thickness and Surface Elevation, Southeastern Ross Embayment, West Antarctica |
Geographic Coverage
| N: -71.7 | S: -81.7 | E: -84.5 | W: -134.9 |
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Data Set Citation
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Dataset Originator/Creator:
John W. Holt
Dataset Title: Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica Dataset Release Date: 2006-10-25 Dataset Release Place: Boulder, Colorado USA Dataset Publisher: National Snow and Ice Data Center (NSIDC) Data Presentation Form: Digital Media Online Resource: http://nsidc.org/data/nsidc-0292.html |
Temporal Coverage
| Start Date: 2004-11-01 |
| Stop Date: 2005-03-31 |
Location Keywords
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CONTINENT
> ANTARCTICA
> Amundsen Sea Embayment
GEOGRAPHIC REGION > POLAR |
Data Resolution
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Latitude Resolution:
5 km
Longitude Resolution: 5 km |
Science Keywords
| CRYOSPHERE >SNOW/ICE >ICE DEPTH/THICKNESS [Definition] |
| TERRESTRIAL HYDROSPHERE >SNOW/ICE >ICE DEPTH/THICKNESS [Definition] |
| LAND SURFACE >TOPOGRAPHY >TERRAIN ELEVATION [Definition] |
| OCEANS >BATHYMETRY/SEAFLOOR TOPOGRAPHY >SEAFLOOR TOPOGRAPHY [Definition] |
| CRYOSPHERE >GLACIERS/ICE SHEETS >GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY [Definition] |
| TERRESTRIAL HYDROSPHERE >GLACIERS/ICE SHEETS >GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY [Definition] |
ISO Topic Category
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CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION |
Platform
| AIRCRAFT [Information] |
Instrument
| GPS >Global Positioning System [Information] |
| RADAR >Radio Detection and Ranging [Information] |
| RADAR ECHO SOUNDERS |
Keywords
| AGDC |
| Airborne geophysical survey of the Amundsen Sea Embayment, Antarctica (AGASEA) |
| Amundsen Basin |
| Amundsen Sea Embayment |
| Antarctica |
| Ice Sheet Elevation |
| Pine Island Glacier |
| Subglacial Topography |
| Thwaites Glacier |
| WAIS |
| West Antarctic Ice Sheet |
| West Antarctica |
Data Set Progress
| COMPLETE |
Originating Center
| NSIDC_AGDC |
Data Center
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NSIDC Antarctic Glaciological Data Center
[Information]
Data Center URL: http://nsidc.org/agdc/ Dataset ID: NSIDC-0292
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NSIDC U.S. Antarctic Data Coordination Center
[Information]
Data Center URL: http://nsidc.org/usadcc/ Dataset ID: NSIDC-0292
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Distribution
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Distribution_Media:
FTP
Distribution_Size: 1.32 MB Distribution_Format: ASCII text Fees: none |
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Distribution_Media:
FTP
Distribution_Size: 140 KB Distribution_Format: binary Fees: none |
Personnel
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JOHN
W.
HOLT Role: INVESTIGATOR Phone: 512-471-0489 Fax: 512-471-0999 Email: jack at ig.utexas.edu Contact Address: Institute for Geophysics University of Texas at Austin 4412 Spicewood Springs Rd. #600 City: Austin Province or State: TX Postal Code: 78759-8500 Country: USA |
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DON
BLANKENSHIP Role: INVESTIGATOR Phone: (512) 471-0489 Fax: (512) 471-8844 Email: blank at ig.utexas.edu Contact Address: J.J. Pickle Research Campus, Bldg. 196 | 10100 Burnet Rd. City: Austin Province or State: TX Postal Code: 78758 Country: USA |
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DAVID
L.
MORSE Role: INVESTIGATOR Contact Address: Institute for Geophysics University of Texas at Austin 4412 Spicewood Springs Rd. #600 City: Austin Province or State: TX Postal Code: 78759-8500 Country: USA |
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DAVID
G.
VAUGHN Role: INVESTIGATOR Email: dgv at bas.ac.uk Contact Address: British Antarctic Survey High Cross Madingley Road City: Cambridge Postal Code: CB3 0ET Country: United Kingdom |
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HUGH
F.J.
CORR Role: INVESTIGATOR Email: hfjc at bas.ac.uk Contact Address: British Antarctic Survey High Cross Madingley Road City: Cambridge Postal Code: CB3 0ET Country: United Kingdom |
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DUNCAN
A.
YOUNG Role: INVESTIGATOR Contact Address: J.J. Pickle Research Campus Bldg. 196 10100 Burnet Road (R2200) City: Austin Province or State: Texas Postal Code: 78758-4445 Country: USA |
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NSIDC
USER SERVICES Role: TECHNICAL CONTACT Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA |
Publications/References
Holt, J. W., D. D. Blankenship, D. L. Morse, D. A. Young, M. E. Peters, S. D. Kempf, et. al. 2006. New boundary conditions for the West Antarctic Ice Sheet: subglacial topography of the Thwaites and Smith glacier catchments. Geophysical Research Letters 33, L09502. doi:10.1029/2005GL025561.
Vaughan, D. G., H. F. J. Corr, F. Ferraccioli, N. Frearson, A. O'Hare, D. Mach, J. Holt, et. al. 2006. New boundary conditions for the West Antarctic Ice Sheet: subglacial topography beneath Pine Island Glacier. Geophysical Research Letters 33, L09501. doi:10.1029/2005GL025588.
Vaughan, D. G., H. F. J. Corr, F. Ferraccioli, N. Frearson, A. O'Hare, D. Mach, J. Holt, et. al. 2006. New boundary conditions for the West Antarctic Ice Sheet: subglacial topography beneath Pine Island Glacier. Geophysical Research Letters 33, L09501. doi:10.1029/2005GL025588.
Creation and Review Dates
DIF Creation Date:
2006-10-25
Last DIF Revision Date:
2010-03-09
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