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

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 drain...

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Bibliographic Details
Main Authors: Payne, Antony J, Vieli, Andreas, Shepherd, Andrew P, Wingham, Duncan J, Rignot, Eric
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union 2004
Subjects:
Institute of Geography
910 Geography & travel
Antarctic
West Antarctic Ice Sheet
Antarc*
Ice Sheet
Online Access:https://www.zora.uzh.ch/id/eprint/136437/
https://www.zora.uzh.ch/id/eprint/136437/1/2004_Payne_et_al-2004-Geophysical_Research_Letters.pdf
https://doi.org/10.5167/uzh-136437
https://doi.org/10.1029/2004GL021284
Description
Summary: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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