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Will present day glacier retreat increase volcanic activity? Stress induced by recent glacier retreat and its effect on magmatism at the Vatnajokull ice cap, Iceland

Pagli, C. and Sigmundsson, F. (2008) Will present day glacier retreat increase volcanic activity? Stress induced by recent glacier retreat and its effect on magmatism at the Vatnajokull ice cap, Iceland. Geophysical Research Letters, 35 (9). Art.No L09304. ISSN 0094-8276

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Abstract

Global warming causes retreat of ice caps and ice sheets. Can melting glaciers trigger increased volcanic activity? Since 1890 the largest ice cap of Iceland, Vatnajokull, with an area of similar to 8000 km(2), has been continuously retreating losing about 10% of its mass during last century. Present-day uplift around the ice cap is as high as 25 mm/yr. We evaluate interactions between ongoing glacio-isostasy and current changes to mantle melting and crustal stresses at volcanoes underneath Vatnajokull. The modeling indicates that a substantial volume of new magma, similar to 0.014 km(3)/yr, is produced under Vatnajokull in response to current ice thinning. Ice retreat also induces significant stress changes in the elastic crust that may contribute to high seismicity, unusual focal mechanisms, and unusual magma movements in NW-Vatnajokull.

Item Type: Article
Copyright, Publisher and Additional Information: © 2008 American Geophysical Union. This is an author produced version of a paper published in Geophysical Research Letters. Uploaded in accordance with the publisher's self archiving policy.
Academic Units: The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds)
Depositing User: Repository Administrator York
Date Deposited: 30 Jul 2008 17:07
Last Modified: 08 Feb 2013 17:05
Published Version: http://dx.doi.org/10.1029/2008GL033510
Status: Published
Publisher: American Geophysical Union
Refereed: Yes
Identification Number: 10.1029/2008GL033510
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/4094

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