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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 |
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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 |
UTAS Author: | King, MA (Professor Matt King) |
ID Code: | 81798 |
Year Published: | 2003 |
Web of Science® Times Cited: | 179 |
Deposited By: | Geography and Environmental Studies |
Deposited On: | 2013-01-08 |
Last Modified: | 2013-01-08 |
Downloads: | 0 |
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