HR: 0800h
AN: C11A-0092    [Abstracts]
TI: Toward estimating sea level rise contribution from the observed Greenland Ice Sheet volume changes
AU: * Burgess, E W
EM: evanburgess@gmail.com
AF: Department of Geography, University of Utah, 260 S. Central Campus Dr. Rm. 270, Salt Lake City, UT 84112-9155, United States
AU: Forster, R R
EM: rick.forster@geog.utah.edu
AF: Department of Geography, University of Utah, 260 S. Central Campus Dr. Rm. 270, Salt Lake City, UT 84112-9155, United States
AU: Smith, L C
EM: lsmith@geog.ucla.edu
AF: Department of Geography, University of California, 1255 Bunche Hall Box 951524, Los Angeles, CA 90095, United States
AU: Reeh, N
EM: nr@oersted.dtu.dk
AF: Technical University of Denmark, Orsteds Plads, bldg. 348, Lyngby, DK-2800 Kg, Denmark
AU: Box, J E
EM: box.11@osu.edu
AF: Byrd Polar Research Center, Department of Geography, Ohio State University, Scott Hall Room 108, 1090 Carmack Road, Columbus, OH 43210-1002, United States
AB: The Greenland ice sheet is a major contributor to observed and projected global sea level rise. Ice sheet surface elevation changes have been used to estimate this input to sea level change. However, the process of snow surface layer densification, which causes changes in volume (elevation) but not necessarily mass, represents a recognized but poorly quantified uncertainty in estimating true mass losses from surface elevation changes. Our project is using remote sensing, field observations and Polar MM5 climate model data, together with a melt/refreezing densification model to help quantify the magnitude of this effect across the Greenland Ice Sheet. Preliminary results for melt model inputs will be presented. Annual precipitation maps are derived from firn cores and coastal meteorological station data. Surface melt intensity and duration is estimated from microwave remote sensing datasets and compared with Polar MM5.
DE: 0736 Snow (1827, 1863)
DE: 0762 Mass balance (1218, 1223)
DE: 0776 Glaciology (1621, 1827, 1863)
DE: 0798 Modeling
DE: 1641 Sea level change (1222, 1225, 4556)
SC: Cryosphere [C]
MN: 2007 Fall Meeting