AGASEA-BBAS First Results
Ice thickness and subglacial topography in the Amundsen Sea Embayment
This page presents our first results from the joint field campaign conducted by UTIG and BAS in the austral summer of 2004-05 covering the entire catchments of both Thwaites and Pine Island Glaciers (plus a bit more). Ice thickness measurements based on radar sounding data were prioritized in post-season processing and analysis. In order to construct the most complete bed elevation map possible, we added all other sources of ice thickness data available for the area. We subtracted these ice thicknesses from a surface DEM under development by Jonathan Bamber to generate a new bed elevation map.
And you might find this interesting:
Map of differences in ice thickness between BEDMAP and our new ASE05 grid.
Papers describing these results, including data acquisition and gridding:
Holt, J. W., D. D. Blankenship, D. L. Morse, D. A. Young, M. E. Peters, S. D. Kempf, T. G. Richter, D. G. Vaughan, and H. F. J. Corr (2006), New boundary conditions for the West Antarctic Ice Sheet: Subglacial topography of the Thwaites and Smith glacier catchments, Geophys. Res. Lett., 33, L09502, doi:10.1029/2005GL025561.
Vaughan, D. G., H. F. J. Corr, F. Ferraccioli, N. Frearson, A. O'Hare, D. Mach, J. Holt, D. Blankenship, D. Morse, and D. A. Young (2006), New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier, Geophys. Res. Lett., 33, L09501, doi:10.1029/2005GL025588.
This work was funded by the National Science Foundation Office of Polar Programs (grant OPP-0230197), the British Antarctic Survey, the Jackson School of Geosciences at the University of Texas at Austin, and the G. Unger Vetlesen Foundation.
Data Dissemination Timeline:
Please see our Proposed Survey Objectives page for details regarding our NSF-approved data release plan.