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, 323 (5915), 753

The Sea-Level Fingerprint of West Antarctic Collapse

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The Sea-Level Fingerprint of West Antarctic Collapse

Jerry X Mitrovica et al. Science.

Abstract

Recent projections of sea-level rise after a future collapse of the West Antarctic Ice Sheet (for example, the Fourth Intergovernmental Panel on Climate Change Assessment Report) assume that meltwater will spread uniformly (that is, eustatically) across the oceans once marine-based sectors of the West Antarctic are filled. A largely neglected 1977 study predicted that peak values would be 20% higher than the eustatic in the North Pacific and 5 to 10% higher along the U.S. coastline. We show, with use of a state-of-the-art theory, that the sea-level rise in excess of the eustatic value will be two to three times higher than previously predicted for U.S. coastal sites.

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