Interfacial water in polar glaciers and glacier sliding at -17 °C

被引：80

作者：

Cuffey, KM

Conway, H

Hallet, B

Gades, AM

Raymond, CF

机构：

[1] Univ Calif Berkeley, Dept Geog, Berkeley, CA 94720 USA

[2] Univ Washington, Quaternary Res Ctr, Dept Geophys, Seattle, WA 98195 USA

[3] Univ Washington, Dept Geol Sci, Seattle, WA 98195 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 1999年 / 26卷 / 06期

关键词：

D O I：

10.1029/1999GL900096

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We have observed sliding at a cold (-17 degrees C) ice-rock interface beneath Meserve Glacier, Antarctica, and the segregation of ice into clean lenses amidst the dirty basal layers of this glacier. We interpret these as manifestations of thin water films at ice-rock interfaces. We use Shreve's theory for sub-freezing sliding to estimate the nominal film thickness to be at least tens of nanometers. Such water films should exist around rocks in most polar ices, and likely have high solute concentrations due to solute rejection during regelation and due to exchange with veins and grain boundaries where impurities reside.

引用

页码：751 / 754

页数：4

共 19 条

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Alley R.., 1986, J. Glaciol, V32, P415

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