Deglaciation and glacial erosion: A joint control on magma productivity by continental unloading
Abstract
Glacial-interglacial cycles affect the processes through which water and rocks are redistributed across the Earth's surface, thereby linking the solid Earth and climate dynamics. Regional and global scale studies suggest that continental lithospheric unloading due to ice melting during the transition to interglacials leads to increased continental magmatic, volcanic, and degassing activity. Such a climatic forcing on the melting of the Earth's interior, however, has always been evaluated regardless of continental unloading by glacial erosion, albeit the density of rock exceeds that of ice by approximately 3 times. Here we present and discuss numerical results involving synthetic but realistic topographies, ice caps, and glacial erosion rates suggesting that erosion may be as important as deglaciation in affecting continental unloading. Our study represents an additional step toward a more general understanding of the links between a changing climate, glacial processes, and the melting of the solid Earth.
Additional Information
© 2016 American Geophysical Union. Received 7 DEC 2015; Accepted 22 JAN 2016; Accepted article online 28 JAN 2016; Published online 19 FEB 2016. P.S. was partially supported by the Laboratoire d'Excellence (LABEX) VOLTAIRE of the University of Orléans. L.C. and S.C. (grant N°200021_146822) acknowledge the Swiss National Science Foundation. J.-D.C. acknowledges the ETH-Z. We thank Jean Braun and two anonymous reviewers for suggesting improvements to an early version of the manuscript. The source code for the model used in this study and the outputs of the reference simulation are included in the supporting information and are freely available at https://sites.google.com/site/pietrosternai1/home/repositories/grl2015. Any additional data can be requested from P.S. (email: pietrosternai@yahoo.it).Attached Files
Published - Sternai_et_al-2016-Geophysical_Research_Letters.pdf
Supplemental Material - grl53997-sup-0001-s01.docx
Supplemental Material - grl53997-sup-0002-s02.pdf
Supplemental Material - grl53997-sup-0003-s03.pdf
Supplemental Material - grl53997-sup-0004-s04.pdf
Supplemental Material - grl53997-sup-0005-s05.pdf
Supplemental Material - grl53997-sup-0006-s06.pdf
Supplemental Material - grl53997-sup-0007-s07.pdf
Supplemental Material - grl53997-sup-0008-s08.mov
Supplemental Material - grl53997-sup-0009-s09.zip
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Additional details
- Eprint ID
- 66443
- Resolver ID
- CaltechAUTHORS:20160425-102748323
- University of Orléans
- 200021_146822
- Swiss National Science Foundation (SNSF)
- ETH Zürich
- Created
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2016-05-03Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field