HR: 0800h
AN: U41C-0627    [Abstracts]
TI: PRESENT PERMAFROST EXTENT in ALASKA UTILIZING NUMERICAL MODELING
AU: * Busey, R C
EM: fnrcb1@uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks, P.O. Box 757340, Fairbanks, AK 99775, United States
AU: Hinzman, L D
EM: ffldh@uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks, P.O. Box 757340, Fairbanks, AK 99775, United States
AU: Bryan, R
EM: rbryan@iarc.uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks, P.O. Box 757340, Fairbanks, AK 99775, United States
AU: Romanovsky, V E
EM: ffver@uaf.edu
AF: Geophysical Institute, Universit of Alaska Fairbanks, P.O. Box 757320, Fairbanks, AK 99775, United States
AB: Area underlain by permafrost in Alaska varies from continuous in the north through sporadic and warmer ground in the south. A changing climate makes estimating thermal response and predicting changes in extent in the transitional areas valuable for wildlife management as well as human infrastructure resiliency. Out recent research has focused on the Seward Peninsula of Alaska. Where average air temperatures are just below freezing and the permafrost is very warm, an area susceptible to dramatic change in response to a warming climate. In this paper the focus expands to the state of Alaska using two methods of estimating extent: the Geophysical Institute Permafrost Lab method (GIPL model is based on the modified Kudryavtsev approach) and the TTOP method originally derived by Smith and Riseborough. Current meteorological data is based on the present observational record.
DE: 0700 CRYOSPHERE (4540)
DE: 0702 Permafrost (0475)
DE: 0736 Snow (1827, 1863)
DE: 0798 Modeling
SC: Union [U]
MN: 2007 Fall Meeting