Armitage, JJ, Ferguson, DJ orcid.org/0000-0003-0612-6512, Petersen, KD et al. (1 more author) (2019) The importance of Icelandic ice sheet growth and retreat on mantle CO2 flux. Geophysical Research Letters, 46 (12). pp. 6451-6458. ISSN 0094-8276
Abstract
Climate cycles may significantly affect the eruptive behavior of terrestrial volcanoes due to pressure changes caused by glacial loading, which raises the possibility that climate change may modulate CO2 degassing via volcanism. In Iceland, magmatism is likely to have been influenced by glacial activity. To explore if deglaciation therefore impacted CO2 flux we coupled a model of glacial loading over the last ∼120 ka to melt generation and transport. We find that a nuanced relationship exists between magmatism and glacial activity. Enhanced CO2 degassing happened prior to the main phase of late‐Pleistocene deglaciation, and it is sensitive to the duration of the growth of the ice sheet entering into the LGM, as well as the rate of ice loss. Ice sheet growth depresses melting in the upper mantle, creating a delayed pulse of CO2 out‐gassing as the magmatic system recovers from the effects of loading.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2019, American Geophysical Union. All Rights Reserved. This is the published version of a paper published in Geophysical Research Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 Jun 2019 11:14 |
Last Modified: | 28 Nov 2019 01:40 |
Status: | Published |
Publisher: | American Geophysical Union |
Identification Number: | 10.1029/2019GL081955 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:147043 |