Entry_ID: NSIDC-0292
Entry_Title: Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica
Group: Data_Set_Citation
   Dataset_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: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/nsidc-0292.html
   Dataset DOI: http://dx.doi.org/10.7265/N59W0CDC
End_Group
Group: Personnel
   Role: Investigator
   First_Name: John
   Middle_Name: W.
   Last_Name: Holt
   Group: Contact_Address
      Address: University of Texas at Austin
      Address: Institute for Geophysics
      Address: 4412 Spicewood Springs Rd. #600
      City: Austin
      Province_or_State: TX
      Postal_Code:  78759-850
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Donald
   Middle_Name: D.
   Last_Name: Blankenship
   Email: blank@ig.utexas.edu
   Group: Contact_Address
      Address: University of Texas at Austin
      Address: Institute for Geophysics
      Address: 4412 Spicewood Springs Rd. #600
      City: Austin
      Province_or_State: TX
      Postal_Code: 78759-8500
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: David
   Middle_Name: L.
   Last_Name: Morse
   Group: Contact_Address
      Address: University of Texas at Austin
      Address: Institute for Geophysics
      City: Austin
      Province_or_State: TX
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: David
   Middle_Name: G.
   Last_Name: Vaughan
   Email: dgv@bas.ac.uk
   Group: Contact_Address
      Address: British Antarctic Survey
      Address: High Cross, Madingley Road
      Address: CAMBRIDGE
      Address: CB3 0ET
      Address: United Kingdom
      City: Cambridge
      Country: United Kingdom
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Hugh
   Middle_Name: F. J.
   Last_Name: Corr
   Email: hfjc@bas.ac.uk
   Group: Contact_Address
      Address: British Antarctic Survey
      Address: High Cross

      Address: Madingley Road

      Address: Cambridge

      Address: CB3 0ET

      Address: United Kingdom
      City: Cambridge
      Country: United Kingdom
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Duncan
   Middle_Name: A.
   Last_Name: Young
   Group: Contact_Address
      Address: University of Texas at Austin
      Address: Jackson School of Geosciences, Institute for Geophysics
      Address: J.J. Pickle Research Campus
      Address: Bldg. 196
      Address: 10100 Burnet Road (R2200)
      Address: Austin, TX 78758-4445
      City: Austin
      Province_or_State: Texas
      Postal_Code: 78758-4445
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Technical Contact
   First_Name: NSIDC
   Last_Name: User Services
   Email: nsidc@nsidc.org
   Phone: 1 303 492-6199 x
   Fax: 1 303  492-2468 x
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Glacier Topography/Ice Sheet Topography
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Ice Depth/Thickness
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Land Surface
   Term: Topography
   Variable_Level_1: Terrain Elevation
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Bathymetry/Seafloor Topography
   Variable_Level_1: Seafloor Topography
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Glacier Topography/Ice Sheet Topography
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Ice Depth/Thickness
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
ISO_Topic_Category: Geoscientific Information
Keyword: AGDC
Keyword: Airborne geophysical survey of the Amundsen Sea Embayment, Antarctica (AGASEA)
Keyword: Amundsen Basin
Keyword: Amundsen Sea Embayment
Keyword: Antarctica
Keyword: Ice Sheet Elevation
Keyword: Pine Island Glacier
Keyword: Subglacial Topography
Keyword: Thwaites Glacier
Keyword: WAIS
Keyword: West Antarctica
Keyword: West Antarctic Ice Sheet
Sensor_Name: GPS > Global Positioning System
Sensor_Name: RADAR > Radio Detection and Ranging
Sensor_Name: RADAR ECHO SOUNDERS
Source_Name: AIRCRAFT
Group: Temporal_Coverage
   Start_Date: 2004-11-01
   Stop_Date: 2005-03-31
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: -81.7
   Northernmost_Latitude: -71.7
   Westernmost_Longitude: -134.9
   Easternmost_Longitude: -84.5
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
   Detailed_Location: AMUNDSEN SEA EMBAYMENT
End_Group
Group: Data_Resolution
   Latitude_Resolution: 5 km
   Longitude_Resolution: 5 km
End_Group
Data_Set_Language: English
Originating_Center: AGDC
Group: Data_Center
   Data_Center_Name: NSIDC > National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Data_Center
   Data_Center_Name: AGDC > Antarctic Glaciological Data Center
   Data_Center_URL: http://nsidc.org/agdc/
   Group: Personnel
      Role: Data Center Contact
      First_Name: AGDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 x
      Fax: 1 303  492-2468 x
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 140 KB
   Distribution_Format: Binary
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 1.32 MB
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: Reference

   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.

End_Group
Group: Summary

   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.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://www.ig.utexas.edu/research/projects/agasea/
   Description: Airborne geophysical survey of the Amundsen Sea Embayment, Antarctica (AGASEA)
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://www.ig.utexas.edu/research/projects/agasea/
   Description: University of Texas, Institute for Geophysics (UTIG) Web site
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0099.html
   Group: Description

      Ice Thickness and Surface Elevation, Southeastern Ross Embayment, West 
      Antarctica

   End_Group
End_Group
IDN_Node: AMD/US
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2006-10-25
Last_DIF_Revision_Date: 2014-03-14
DIF_Revision_History: Removed USADCC logo for Search cleanup.