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Recent dramatic thinning of largest West Antarctic ice stream triggered by oceans


Payne, Antony J; Vieli, Andreas; Shepherd, Andrew P; Wingham, Duncan J; Rignot, Eric (2004). Recent dramatic thinning of largest West Antarctic ice stream triggered by oceans. Geophysical Research Letters, 31(23):L23401.

Abstract

A growing body of observational data suggests that PineIsland Glacier (PIG) is changing on decadal or shorter timescales. These changes may have far-reaching consequences for the future of the West Antarctic ice sheet (WAIS) and global sea levels because of PIG’s role as the icesheet’s primary drainage portal. We test the hypothesis that these changes are triggered by the adjoining ocean.Specifically, we employ an advanced numerical ice-flowmodel to simulate the effects of perturbations at the groundingline on PIG’s dynamics. The speed at which these changes are propagated upstream implies a tight coupling between ice-sheet interior and surrounding ocean.

Abstract

A growing body of observational data suggests that PineIsland Glacier (PIG) is changing on decadal or shorter timescales. These changes may have far-reaching consequences for the future of the West Antarctic ice sheet (WAIS) and global sea levels because of PIG’s role as the icesheet’s primary drainage portal. We test the hypothesis that these changes are triggered by the adjoining ocean.Specifically, we employ an advanced numerical ice-flowmodel to simulate the effects of perturbations at the groundingline on PIG’s dynamics. The speed at which these changes are propagated upstream implies a tight coupling between ice-sheet interior and surrounding ocean.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Date:2004
Deposited On:27 Mar 2017 14:47
Last Modified:27 Mar 2017 14:48
Publisher:American Geophysical Union
ISSN:0094-8276
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1029/2004GL021284

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