Other
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3412501v&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 12, CiteID L12501
Other
2
Cryosphere: Ice Streams, Cryosphere: Glaciology (1621, 1827, 1863), Cryosphere: Thermal Regime, Planetary Sciences: Solid Surface Planets: Heat Flow
Scientific paper
Many of the outlet glaciers in Greenland overlie deep and narrow trenches cut into the bedrock. It is well known that pronounced topography intensifies the geothermal heat flux in deep valleys and attenuates this flux on mountains. Here we investigate the magnitude of this effect for two subglacial trenches in Greenland. Heat flux variations are estimated for idealized geometries using solutions for plane slopes derived by Lachenbruch (1968). It is found that for channels such as the one under Jakobshavn Isbræ, topographic effects may increase the local geothermal heat flux by as much as 100%.
Csatho B. M.
Leftwich T.
Li Jiying
van der Veen C. J.
von Frese Ralph R.
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