NSIDC-0292
Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica
John W. Holt
Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica
2006-10-25
Boulder, Colorado USA
NSIDC: National Snow and Ice Data Center
http://nsidc.org/data/nsidc-0292.html
http://dx.doi.org/10.7265/N59W0CDC
Investigator
John
W.
Holt
University of Texas at Austin
Institute for Geophysics
4412 Spicewood Springs Rd. #600
Austin
TX
78759-850
USA
Investigator
Donald
D.
Blankenship
blank@ig.utexas.edu
University of Texas at Austin
Institute for Geophysics
4412 Spicewood Springs Rd. #600
Austin
TX
78759-8500
USA
Investigator
David
L.
Morse
University of Texas at Austin
Institute for Geophysics
Austin
TX
Investigator
David
G.
Vaughan
dgv@bas.ac.uk
British Antarctic Survey
High Cross, Madingley Road
CAMBRIDGE
CB3 0ET
United Kingdom
Cambridge
United Kingdom
Investigator
Hugh
F. J.
Corr
hfjc@bas.ac.uk
British Antarctic Survey
High Cross
Madingley Road
Cambridge
CB3 0ET
United Kingdom
Cambridge
United Kingdom
Investigator
Duncan
A.
Young
University of Texas at Austin
Jackson School of Geosciences, Institute for Geophysics
J.J. Pickle Research Campus
Bldg. 196
10100 Burnet Road (R2200)
Austin, TX 78758-4445
Austin
Texas
78758-4445
USA
Technical Contact
NSIDC
User Services
nsidc@nsidc.org
1 303 492-6199 x
1 303 492-2468 x
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
EARTH SCIENCE
Cryosphere
Glaciers/Ice Sheets
Glacier Topography/Ice Sheet Topography
EARTH SCIENCE
Cryosphere
Snow/Ice
Ice Depth/Thickness
EARTH SCIENCE
Land Surface
Topography
Terrain Elevation
EARTH SCIENCE
Oceans
Bathymetry/Seafloor Topography
Seafloor Topography
EARTH SCIENCE
Terrestrial Hydrosphere
Glaciers/Ice Sheets
Glacier Topography/Ice Sheet Topography
EARTH SCIENCE
Terrestrial Hydrosphere
Snow/Ice
Ice Depth/Thickness
Climatology/Meteorology/Atmosphere
Geoscientific Information
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 Antarctica
West Antarctic Ice Sheet
GPS
Global Positioning System
RADAR
Radio Detection and Ranging
RADAR ECHO SOUNDERS
AIRCRAFT
2004-11-01
2005-03-31
complete
-81.7
-71.7
-134.9
-84.5
CONTINENT
ANTARCTICA
AMUNDSEN SEA EMBAYMENT
5 km
5 km
English
NSIDC_AGDC
NSIDC
National Snow and Ice Data Center
http://nsidc.org
Data Center Contact
NSIDC
User Services
nsidc@nsidc.org
1 303 492-6199
1 303 492-2468
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
NSIDC_AGDC
NSIDC Antarctic Glaciological Data Center
http://nsidc.org/agdc/
Data Center Contact
NSIDC AGDC
User Services
nsidc@nsidc.org
1 303 492-6199
1 303 492-2468
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
NSIDC_USADCC
NSIDC U.S. Antarctic Data Coordination Center
http://nsidc.org/usadcc/
Data Center Contact
NSIDC USADCC
User Services
nsidc@nsidc.org
1 303 492-6199
1 303 492-2468
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
FTP
1.32 MB
ASCII Text
FTP
140 KB
Binary
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.
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.
VIEW PROJECT HOME PAGE
http://www.ig.utexas.edu/research/projects/agasea/
Airborne geophysical survey of the Amundsen Sea Embayment, Antarctica (AGASEA)
VIEW PROJECT HOME PAGE
http://www.ig.utexas.edu/research/projects/agasea/
University of Texas, Institute for Geophysics (UTIG) Web site
VIEW RELATED INFORMATION
http://nsidc.org/data/nsidc-0099.html
Ice Thickness and Surface Elevation, Southeastern Ross Embayment, West Antarctica
AMD/US
CEOS IDN DIF
9.7
2006-10-25
2013-03-18
Added DOI