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Atmospheric forcing of rapid marine-terminating glacier retreat in the Canadian Arctic Archipelago.

Cook, A.J. and Copland, L. and Noel, B.P.Y. and Stokes, C.R. and Bentley, M.J. and Sharp, M.J. and Bingham, R.G. and van den Broeke, M.R. (2019) 'Atmospheric forcing of rapid marine-terminating glacier retreat in the Canadian Arctic Archipelago.', Science advances., 5 (3). eaau8507.

Abstract

The Canadian Arctic Archipelago contains >300 glaciers that terminate in the ocean, but little is known about changes in their frontal positions in response to recent changes in the ocean-climate system. Here, we examine changes in glacier frontal positions since the 1950s and investigate the relative influence of oceanic temperature versus atmospheric temperature. Over 94% of glaciers retreated between 1958 and 2015, with a region-wide trend of gradual retreat before ~2000, followed by a fivefold increase in retreat rates up to 2015. Retreat patterns show no correlation with changes in subsurface ocean temperatures, in clear contrast to the dominance of ocean forcing in western Greenland and elsewhere. Rather, significant correlations with surface melt indicate that increased atmospheric temperature has been the primary driver of the acceleration in marine-terminating glacier frontal retreat in this region.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1126/sciadv.aau8507
Publisher statement:Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
Date accepted:29 January 2019
Date deposited:21 March 2019
Date of first online publication:13 March 2019
Date first made open access:21 March 2019

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