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Thermomechanical coupling of ice flow with the bedrock

Hindmarsh, Richard C.A.. 2003 Thermomechanical coupling of ice flow with the bedrock. Annals of Glaciology, 37. 390-396. 10.3189/172756403781815988

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Abstract/Summary

Two aspects of thermal coupling with bedrock are considered: the coupled time-dependent problem of co-evolving temperatures in lithosphere and ice; and the influence of basal topography on steady temperature distribution within the ice. The nature of the time-dependent coupling is found to depend on the horizontal velocity. As has been suggested, there is a cooling of steady temperatures on bedrock highs, but this is phase-shifted downstream when horizontal velocities increase. This observation may have consequences for geomorphological processes such as plucking and protection. The effect of bedrock channelling on steady temperature is considered. The positive anomaly of basal temperature due to channelling increases as the transverse wavelength decreases, but not monotonically, reaching a plateau when both the wavelengths of the basal topography are around 100 km.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.3189/172756403781815988
Programmes: BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Global Interactions of the Antarctic Ice Sheet
ISSN: 0260-3055
Date made live: 11 Apr 2012 09:52
URI: http://nora.nerc.ac.uk/id/eprint/17643

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