HR: 1330h
AN: C32A-0440    [PDF]
TI: Glaciology From ICESat - East Antarctic Megadunes
AU: * Shuman, C A
EM: Christopher.A.Shuman@nasa.gov
AF: Oceans and Ice Branch, Laboratory for Hydrospheric Processes, NASA Goddard Space Flight Center, Code 971, Building 33, Room A210, Greenbelt, MD 20771 United States
AU: Fahnestock, M A
EM: Mark.Fahnestock@unh.edu
AF: Center for the Study of Complex Systems, University of New Hampshire, 225 Morse Hall, Durham, NH 03824 United States
AU: Scambos, T A
EM: teds@icehouse.colorado.edu
AF: National Snow and Ice Data Center, University of Colorado, Campus Box 449, 1540 30th Street, Boulder, CO 80309 United States
AU: Albert, M R
EM: Mary.R.Albert@erdc.usace.army.mil
AF: Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, NH 03755 United States
AU: Bauer, R
EM: bauerr@kryos.colorado.edu
AF: National Snow and Ice Data Center, University of Colorado, Campus Box 449, 1540 30th Street, Boulder, CO 80309 United States
AB: Beginning on February 20, 2003, NASA's Ice, Cloud, and land Elevation Satellite (ICESat) began collecting high-precision elevation data across Antarctica. Using the first of its three lasers, this satellite altimetry mission has rapidly provided an extensive data set of ice sheet elevations as well as meteorological phenomena. This presentation will focus on the elevation profiles from four ascending and four descending tracks taken from the first 6 cycles of ICESat data. As part of an NSF-sponsored field project in a portion of East Antarctica's megadunes, these elevation profiles were used to support and refine our ground-based observations. The eight ICESat tracks that intersect over our field site have been quality controlled to remove the effects of clouds and/or blowing snow and then processed to yield precise repeat track and crossover elevations. Although not yet fully calibrated, ICESat's elevation measurements are sufficiently precise to illustrate the several-meter amplitude and several-kilometer wavelength of these extensive ice sheet features. Additional aspects of this valuable new glaciological data set will also be presented.
UR: http://nsidc.org/antarctica/megadunes/
DE: 0933 Remote sensing
DE: 1243 Space geodetic surveys
DE: 1827 Glaciology (1863)
DE: 1863 Snow and ice (1827)
SC: Cryosphere [C]
MN: 2003 Fall Meeting