HR: 09:15h
AN: C41C-06    [Abstracts]
TI: Crustal geothermal controls on ice sheet dynamics of Greenland
AU: * Leftwich, T E
EM: leftwich@geology.ohio-state.edu
AF: Center for Remote Sensing of Ice Sheets, University of Kansas, Lawrence, KS 66045, United States
AU: van der Veen, K
EM: cjvdv@ku.edu
AF: Center for Remote Sensing of Ice Sheets, University of Kansas, Lawrence, KS 66045, United States
AU: van der Veen, K
EM: cjvdv@ku.edu
AF: Department of Geography, University of Kansas, Lawrence, KS 66045, United States
AU: von Frese, R R
EM: vonfrese@geology.ohio-state.edu
AF: School of Earth Science, The Ohio State University, Columbus, OH 43210, United States
AU: Csatho, B
EM: bcsatho@buffalo.edu
AF: Department of Geology, State University of Buffalo at New York, Buffalo, NY 14260, United States
AB: Rapid ice flow in the northeast quadrant of the Greenland Ice Sheet is associated with unusually high heat flow. Heat flux can be greatly increased in deep valleys to promote basal melting with additional feedback due to locally increased friction. However, crustal thinning can also enhance heat flow because the relatively thermally conductive mantle is closer to the surface. In addition to incised topography, relatively shallow Moho also occurs beneath the northeast quadrant of the Greenland Ice Sheet. We made regional three-dimensional thermal models that include the effects of topographic and mantle relief. These effects can strongly enhance the heat flux at the base of the ice sheet.
DE: 0726 Ice sheets
DE: 0766 Thermodynamics (1011, 3611, 8411)
DE: 0768 Thermal regime
DE: 0798 Modeling
SC: Cryosphere [C]
MN: 2007 Fall Meeting