Basal perturbations under ice streams: form drag and surface expression
Author: Schoof, Christian
Source: Journal of Glaciology, Volume 48, Number 162, June 2002 , pp. 407-416(10)
Publisher: International Glaciological Society
Abstract:Classical sliding theories consider ice sliding over obstacles which are much shorter than the thickness of overlying ice. Here we present a theory which considers ''form drag'' generated under ice streams by large obstacles such as subglacial bedforms, which may have lengths comparable to ice thickness. We also investigate how perturbations at the surface of an ice stream can be generated by such bedforms, and develop a mathematical framework for separating the effects of such local (kilometre-scale) variations in ice flow from the bulk flow of the ice stream.
Document Type: Research Article
Publication date: 2002-06-01
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