文章基本信息

标题：Basal perturbations under ice streams: form drag and surface expression
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作者：Christian Schoof
期刊名称：Journal of Glaciology
印刷版ISSN：0022-1430
电子版ISSN：1727-5652
出版年度：2002
卷号：48
期号：162
页码：407-416
DOI：10.3189/172756502781831269
出版社：Cambridge University Press
摘要：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.