✦ LIBER ✦

TOWARDS A HYDROLOGICAL MODEL FOR COMPUTERIZED ICE-SHEET SIMULATIONS

✍ Scribed by RICHARD B. ALLEY

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 1007 KB
Volume: 10
Category: Article
ISSN: 0885-6087
DOI: 10.1002/(sici)1099-1085(199604)10:4<649::aid-hyp397>3.0.co;2-1

No coin nor oath required. For personal study only.

✦ Synopsis

Ice-sheet modelling typically uses grid cells 10 km or more on a side, so any hydrological and sliding model must average or parameterize processes that vary over shorter distances than this. Observations and theory suggest that basally produced water remains in a distributed, high-pressure system unless it encounters low-pressure channels fed by surface melt. Such distributed systems appear to exhibit increasing water storage, water transmission and water lubrication of sliding with increasing water pressure. A model based on these assumptions successfully simulates some aspects of the non-steady response of mountain glaciers to externally forced channel-pressure variations; it merits testing in ice-sheet modelling.

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