HR: 0800h
AN: G51C-0617    [Abstracts]
TI: Alaska Glacier Observations with L-band InSAR and Lidar
AU: * Forster, R R
EM: rick.forster@geog.utah.edu
AF: Department of Geography, 260 S. Central Campus Dr. Room 270, Salt Lake City, UT 84112, United States
AU: Sauber, J M
EM: Jeanne.M.Sauber-Rosenberg@nasa.gov
AF: Planetary Geodynamics Lab, Goddard Space Flight Center, NASA, Greenbelt, MD 20771, United States
AB: In anticipation of the NASA DESDynI mission we investigate the use of L-band InSAR and spaceborne lidar to measure glacier velocities and surface elevation change on Alaska glaciers. PALSAR InSAR pairs from JAXA's ALOS satellite are used to produce coherence maps, fringe images, and radar line- of-sight displacement measurements. Speckle tracking is used to produce two-dimensional velocity maps. ICESat data are used to test the ability of spaceborne lidar to measure elevation change due to snow accumulation between October/November and March in high accumulation areas. Our initial study region is the upper Seward Glacier in southern Alaska. ICESat derived elevation change is available from four exact repeat tracks across the Upper Seward. Our previous ERS InSAR results for this area indicate a complex velocity field with speeds ranging from 10 to 100 m/year. Preliminary results from a PALSAR pair show areas of high coherence and wide spread success with speckle tracking.
DE: 0720 Glaciers
DE: 0736 Snow (1827, 1863)
SC: Geodesy [G]
MN: 2007 Fall Meeting