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Deglaciation and glacial erosion: A joint control on magma productivity by continental unloading

Sternai, Pietro and Caricchi, Luca and Castelltort, Sébastien and Champagnac, Jean-Daniel (2016) Deglaciation and glacial erosion: A joint control on magma productivity by continental unloading. Geophysical Research Letters, 43 (4). pp. 1632-1641. ISSN 0094-8276. http://resolver.caltech.edu/CaltechAUTHORS:20160425-102748323

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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.


Item Type:Article
Related URLs:
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http://dx.doi.org/10.1002/2015GL067285DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/2015GL067285/abstractPublisherArticle
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).
Funders:
Funding AgencyGrant Number
University of OrléansUNSPECIFIED
Swiss National Science Foundation (SNSF)200021_146822
ETH ZürichUNSPECIFIED
Record Number:CaltechAUTHORS:20160425-102748323
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160425-102748323
Official Citation:Sternai, P., L. Caricchi, S. Castelltort, and J.-D. Champagnac (2016), Deglaciation and glacial erosion: A joint control on magma productivity by continental unloading, Geophys. Res. Lett., 43, 1632–1641, doi:10.1002/2015GL067285
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:66443
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:03 May 2016 03:13
Last Modified:02 Sep 2016 19:04

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