HR: 0800h
AN: C31A-1103    [Abstracts]
TI: Dynamics and Evolution of Taylor Glacier, Antarctica
AU: * Cuffey, K M
EM: kcuffey@berkeley.edu
AF: Department of Geography, University of California, 507 McCone Hall, Berkeley, CA 94720-4740 United States
AU: * Cuffey, K M
EM: kcuffey@berkeley.edu
AF: Department of Earth and Planetary Science, U. California, 307 McCone Hall, Berkeley, CA 94720-4767 United States
AU: Kavanaugh, J L
EM: jeff_kavanaugh@yahoo.com
AF: Department of Geography, University of California, 507 McCone Hall, Berkeley, CA 94720-4740 United States
AU: Kavanaugh, J L
EM: jeff_kavanaugh@yahoo.com
AF: Department of Earth and Atmospheric Sciences, U. Alberta, Earth Sciences Building, Edmonton, AB T6G 2E3 Canada
AU: Morse, D L
EM: morse@utig.ig.utexas.edu
AF: Institute for Geophysics, University of Texas, 4412 Spicewood Springs Road, Austin, TX 78759-8500 United States
AU: Aciego, S
EM: aciego@uclink.berkeley.edu
AF: Department of Earth and Planetary Science, U. California, 307 McCone Hall, Berkeley, CA 94720-4767 United States
AU: Bliss, A
EM: abliss@seismo.berkeley.edu
AF: Department of Geography, University of California, 507 McCone Hall, Berkeley, CA 94720-4740 United States
AB: Taylor Glacier is a high-stress outlet glacier of East Antarctica. It originates on the Taylor Dome, flows eastward through the Transantarctic Mountains, and terminates in the famous Dry Valleys of Victoria Land. Here we summarize results from extensive new studies on its 80 km long ablation zone. Radar surveys show the basal topography is dominated by a deeply eroded central trough. Force balance and flow analyses yield estimates for basal temperature and demonstrate that basal motion of this glacier is non-existent or minor. A full-stress three-dimensional model of ice flow with no approximations in the mathematical framework is used to examine in detail how the glacier negotiates the complex mountainous topography and how the nonlinearity of ice deformation is manifest. We have also measured the stable isotope profile of surface ice along the lower 27 km of the central flowline, and thereby inferred ages of the ice at some locations. Analysis of these data reveal time-dependent behavior of the glacier over millennial timescales. Time-dependent planview models of the system are used to explore past incursions of ice into Taylor Valley.
DE: 0776 Glaciology (1621, 1827, 1863)
DE: 1621 Cryospheric change (0776)
SC: Cryosphere [C]
MN: Fall Meeting 2005