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Tidally controlled stick-slip discharge of a West Antarctic ice stream

Citation

Bindschadler, RA and King, MA and Alley, RB and Anandakrishnan, S and Padman, L, Tidally controlled stick-slip discharge of a West Antarctic ice stream, Science, 301, (5636) pp. 1087-1089. ISSN 0036-8075 (2003) [Refereed Article]

DOI: doi:10.1126/science.1087231

Abstract

A major West Antarctic ice stream discharges by sudden and brief periods of very rapid motion paced by oceanic tidal oscillations of about 1 meter. Acceleration to speeds greater than 1 meter per hour and deceleration back to a stationary state occur in minutes or less. Slip propagates at approximately 88 meters per second, suggestive of a shear wave traveling within the subglacial till. A model of an episodically slipping friction-locked fault reproduces the observed quasi-periodic event timing, demonstrating an ice stream's ability to change speed rapidly and its extreme sensitivity to subglacial conditions and variations in sea level.

Item Details

Item Type:Refereed Article
Keywords:Acceleration; Deceleration; Friction; Ocean engineering; Oscillations; Shear waves; Tidal oscillations; Ice; ice; ice stream; sea level; stick-slip; tidal cycle; acceleration; Antarctica; article; calculation; dynamics; motion; ocean environment
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Physical Geography and Environmental Geoscience not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:King, MA (Professor Matt King)
ID Code:81798
Year Published:2003
Web of Science® Times Cited:150
Deposited By:Geography and Environmental Studies
Deposited On:2013-01-08
Last Modified:2013-01-08
Downloads:0

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