HR: 0800h
AN: C11A-0089    [Abstracts]
TI: Greenland Ice Sheet Outlet Glacier Calf Ice Production Reconstruction: 1958-2006
AU: * Yang, L
EM: yang.998@osu.edu
AF: Byrd Polar Research Center, 1090 Carmack Rd, Scott Hall Rm 108, Columbus, OH 43210, United States
AU: Box, J
EM: box.11@osu.edu
AF: Byrd Polar Research Center, 1090 Carmack Rd, Scott Hall Rm 108, Columbus, OH 43210, United States
AB: Several Greenland outlet glaciers have been observed in a state of significant thinning, acceleration and retreat in the recent decade. Accompanying with glacier acceleration and retreat, the rate of the ice loss to the ocean also increased. Ice discharge variability could be related to many factors, among which climate variability seems of greatest concern. Glaciers south of 70 degrees N have been shown to be sensitive to melt with higher sensitivity from those at southwest. A melt sensitivity model is used to reconstruct long term total ice discharge from Greenland ice sheet. Glacier surface melt rates are found to explain up to 60-90% of ice discharge variance depending on the location of the glacier. The flow-temperature sensitivity is used to estimate that Greenland outlet glaciers contributed calf ice to global sea level rise 0.6 mm/yr during 1958-2006, which accounts for two thirds of the "unexplained" sea level contribution of 1 mm/yr during last 50 years.
DE: 0720 Glaciers
DE: 0726 Ice sheets
DE: 0774 Dynamics
DE: 0776 Glaciology (1621, 1827, 1863)
DE: 0798 Modeling
SC: Cryosphere [C]
MN: 2007 Fall Meeting